Table 4.
Shift capacity and quantity of selected equipment.
|
Equipment identification |
Shift productivity, average |
Specified shift capacity |
Estimated amount of equipment, PC |
|
1. Straightening and cutting machine SMZh-357 |
4,15T 16,73T | ||
|
We accept | |||
|
2. Cutting sheet steel and long products C-229A |
We accept according to the technical characteristics of the machine |
||
|
3. Bending of individual rods SMZh-212 |
0,96T |
1,59T | |
|
We accept | |||
|
4. Welding narrow meshes MT-1206 |
369.60 linear meters 1133.99 linear meters 1224.94 linear meters |
634.4 linear meters 512.4 linear meters 805.2 linear meters | |
|
We accept | |||
|
5. Machine for bending individual meshes SMZh-353 l= 1760 mm 2bending | |||
|
l= 1350 mm 1died | |||
|
We accept | |||
The SMZh-357 installation is designed for preparing measuring rods from coils of reinforcing steel.
The SMZh-357 installation for straightening and cutting reinforcing steel (Fig. 1) includes an unwinding device (coil holder), a fence with a device for filling reinforcement, a machine tool, electrical equipment, a receiving and dumping device and a stockpile for rods.
The unwinding device is designed for installing coils (coils) of reinforcement with a diameter of up to 1500 mm. When installing coils with different internal diameters, the guide posts of the device shift accordingly.
An adjustable friction brake is installed at the bottom of the device.
The guard with a device for threading the fittings ensures the safety of the operating personnel and is equipped with a pincer grip to facilitate threading the ends of the fittings into the correct drum.
The machine has a welded frame on which the feeding and cutting mechanisms and a straightening drum are mounted.
The feed mechanism is used to unwind reinforcing steel from a coil, pull it through a straightening drum and feed the straightened reinforcement into the receiving device. The mechanism is driven from the engine through a V-belt drive to the input shaft of the gearbox (Fig. 2).
The upper and lower pulling rollers are attached to the ends of the shafts coming out of the gearbox. The upper pulling roller, through a cage swinging on an axis, can be moved by a preload mechanism when adjusting the machine to supply reinforcement of a given diameter.
The machine has two pairs of replaceable pulling rollers, each of which has two different grooves for fittings of corresponding diameters.
The cutting mechanism of the machine is driven by a cam sitting at the end of the upper knife shaft. The force is transmitted through a roller and a lever swinging around an axis to a rod with a spring to return it to its original position. The upper end of the spring rests against the plug, and the lower end rests against a pin fixedly fixed in the body.
A movable knife made in the form of a plate is fixed to the lower part of the rod. A fixed sleeve replaceable knife is installed in the housing glass. The gap between the knives is adjusted by a threaded bushing.
A cam is installed on the lower knife shaft, which, through a roller and levers, opens the channel of the receiving device. To put the mechanisms into operation, appropriate mechanisms are provided in the gearbox, and one of the gears is designed to rotate freely on the shaft and transmits rotation when connected by a movable half-coupling moving along the splines of the shaft. The straightening drum is a hollow shaft rotating in bearings. Rotation from the engine is transmitted through a V-belt drive. At the inlet and outlet ends of the drum, two and one fixed dies (cams) are installed along its axis, respectively. In the middle part of the drum, three adjustable dies are installed in the glasses. The position of the glasses with dies is adjusted using two levers from one screw.
The receiving and discharging device consists of two-meter sections connected in series to each other. The section consists of a cylindrical guide with two longitudinal channels of different sizes, a folding rail, a shaft connected to it, brackets and racks. The rack returns to its original position after it is opened to reset the bars using a spring, a rod and a lever attached to the shaft. The shafts and guides of adjacent sections are connected by couplings.
To work with reinforcement with a diameter of up to 6 mm, one guide channel is used, and over 6 mm, another. The required channel is put into operation by turning the guide when setting up the machine.
Depending on the required length of the rods, a measuring mechanism can be installed on any section, including a ramrod, the end of which is affected by the supplied reinforcement. The ramrod is mounted on a spring-loaded slider that carries a flag to act on the limit switch, after which the travel of the slider is limited by inertia by an adjustable stop. The installation is powered from a mains voltage of 220/380 V, frequency 50 Hz. Voltage of power circuits 380 V, control circuits 220 V.
Control is carried out from a panel built into the machine. The installation works as follows. After threading from the coil into the machine, the reinforcement, under the action of the pulling rollers of the machine feed mechanism, is unwound from the coil holder and enters the correct drum of the machine, where it is straightened under the action of multiple alternating bends on its dies. The straightened reinforcement passes through the stationary knife, enters the channel of the receiving and discharging device, which is closed from below by a rack, and at the end of the feed presses the end onto the ramrod of the measuring mechanism. At the same time, the final switch of the mechanism is triggered and gives a command to turn on the movable knife of the machine. While the cutting mechanism is turned on, the ramrod reaches the hard stop of the measuring mechanism and stops along with the reinforcement, which ensures the accuracy of the prepared rods in length.
When triggered, the electromagnet of the cutting mechanism pulls out the thrust wedge, which, moving with the fork, engages the knife shaft coupling halves. A full cutting cycle occurs in half a revolution of the knife shafts, after which they are stopped in their original position by a locking mechanism. At the moment of cutting, the cam located on the first shaft, turning, presses the lever of the cutting mechanism and sets in motion the movable knife, cutting the reinforcement. The cam located on the second shaft, with some delay, turns the receiving shaft through a system of levers. In this case, the rail moves, opening the guide channel of the receiving device, and the cut rod falls out of the channel into the storage tank. At the moment of fixing both shafts of the cutting mechanism, the mechanism for opening the channel of the receiving device and the cleaning rod return to their original position under the action of springs.
Fig. 1. General view of the CSF installation - 357:
1 – storage tank (collection) of rods; 2 – receiving and discharging device; 3 – electrical equipment; 4 – machine; 5 – fencing with a device for filling fittings; 6 – unwinding device.
Fig.2. Kinematic diagram of the installation of CSF - 357:
1 – feed mechanism motor; 2.30 – V-belt drives; 3 – input shaft; 4 – camshaft; 5 – shaft of the lower pulling roller; 6 – clip; 7 – holder axis; 8 – mechanism for pressing the pulling rollers; 9 – pulling rollers; 10 – lower shaft; 11 – movable coupling half; 12 – fork; 13 – traction; 14 – switching mechanism with an electromagnet; 15 – upper knife shaft; 16.24 – cams; 17 – roller; 18 – lever; 19 – lever axis; 20 – rod with knife; 21 – spring; 22 – fixed knife; 23 – glass; 25 – roller; 26,27,28 – levers; 29 – straightening drum motor; 31 – correct drum; 32 – cleaning rod of the measuring device; 33 – limit switch; 34 – wedge; 35 – knife shaft coupling half; 36 – fittings.
* To cut rods from 6 to 12 m in length, additional sections of the receiving device must be installed.
* Weight and overall dimensions are given for installation with a receiving device for cutting rods up to 6 m long
| Machine SMZh-357 |
| Correct drum SMF357.10.12.00.000 |
| Bushing SMZh-357.10.13.00.816 |
| Bushing SMZh-357.10.13.00.878 |
| Bushing SMZh-357.10.13.30.803 |
| Cam SMF357.10.13.00.086 |
| Mesanism measuring SMF-357.20.02A.00.000 |
| Cutting mechanism SMF-357.10.14.00.000 |
| Gear coupling SMZh-357 |
| Tip SMF.357.10.14.00.002 |
| Guide SMZh357.10.14.00.023 |
| Knife SMZh-357 diameter 11mm |
| Knife SMZh-357 diameter 12mm |
| Knife SMZh-357.10.14.00.014 |
| Knife SMZh-357.10.14.00.014-01 |
| Knife SMZh-357.10.14.00.014-02 |
| Knife SMZh357.10.14.00.016 |
| Axle 6-16ф11х90.45.1.280 GOST 9650-80 |
| Spring SMZh-357.10.13.00.062 |
| Spring SMZh-357.10.14.00.004 |
| Roller SMZh-357.10.13.00.004A |
| Roller SMZh-357.10.13.00.004A-01 |
| Roller SMZh-357.10.13.00.004A-02 |
| Roller SMZh-357.10.13.00.004A-03 |
| Roller SMZh357.10.14.15.000SB assembled |
| Section of the receiving device SMZh-357 |
| Glass of SMF-357.00.00.00.021 |
| Glass SMZh-357.10.12.00.020 |
| Glass SMZh-357.10.12.00.022 |
| Cleaning rod SMZh357.20.00.00.013-02 |
| Rod SMZh357.10.14.00.006 assembled |
The automatic straightening-cutting model SMZH 357 is designed for straightening and cutting reinforcing steel of smooth and periodic profiles, BP and OK wire supplied in coils. Marks from the tool and dents at the cutting sites are allowed on the surface of the rods. The machine can be used in hardware and calibration shops of metallurgical plants, as well as in construction industry enterprises and in procurement shops of machine-building plants. Climatic use category UHL4.
The straightening and cutting machine SMZH 357 for straightening and cutting reinforcing steel consists of the following main components:
The SMZH 357 machine consists of
The frame of the SMZH 357 machine is welded; all components of the machine are placed and secured on it. There are holes in the base for fastening the machine with anchor bolts. The feeding mechanism is designed to unwind wire and reinforcement from the coil, pull it through the correct drum and feed the straightened reinforcement rod into the receiving device. The mechanism is driven by an electric motor through a belt drive and a pulley sitting on the output shaft. With the help of a gear pair, rotation is transmitted to the camshaft. A gear sitting on the shaft transmits rotation through a gear to the lower shaft of the traction rollers. The shaft of the upper pulling roller rotates in the cage bearings and is connected to the shaft of the lower pulling roller using a gear pair. The clip swings around an axis that sits motionless in the body. The other end of the holder is connected through an axis to the mechanism for preloading the upper pulling roller. The pulling rollers are interchangeable with several grooves for reinforcing steel of different diameters. At the same time, the gear is engaged with a gear wheel that rotates freely on the shaft together with the coupling half. The movable half-coupling is mounted on the shaft splines and can move along it using a fork and rod. The clutch position is controlled by an activation mechanism with an electromagnet. In this case, the shafts of the cutting mechanism are coupled using a gear pair. The cutting mechanism is driven by a cam located at the end of the upper knife shaft. The force is transmitted through the roller and lever, swinging around an axis, to the rod. There is a spring inside the rod that serves to return the rod to its original position. The upper end of the spring rests against the plug, and its lower end rests against a finger fixedly fixed in the body. At the bottom of the rod there is a movable knife. The fixed knife is pressed against the movable threaded guide. A cam is installed on the lower knife shaft, which, through a roller and a lever, opens the channel of the receiving device. The lever swings around an axle, a rod, and a lever swings on the axle.
The correct drum of the SMZH357 machine is a shaft rotating in bearings. The bearings are installed in housings mounted on the frame. The drum is driven by an electric motor through a V-belt drive and a pulley. 
At the ends of the drum, fixed dies are installed along the axis. The dies are secured in the drum with adjustable bushings and a nut. In the middle part of the drum, adjustable dies are installed in the glasses. The glasses are shifted in the radial direction using levers and a roller with an adjusting screw. The drum is adjusted with one screw. The receiving device is used to receive straightened pieces of reinforcement, measure and collect cut rods. Consists of a two-meter section. The rack tilts back with the help of an electromagnet, opening the channel of the receiving device for ejecting rods. The rack is returned to its original position using springs, rods and levers attached to the rack. The shaft and guide are mounted in brackets attached to the rack with bolts and a pin. Around the finger, any of the sections following the first can be folded back. The shafts and guides of adjacent sections are connected by couplings. The unwinding device is designed for installing coils with a diameter of up to 1400 mm. In order to reduce wear on the inlet hole, a die made of a hard alloy (die) is inserted into it.
Under the force of the pulling rollers, the reinforcing wire unwinds from the unwinding device and, after passing through the fence, enters the correct drum, where, subjected to repeated alternating bending, it is straightened. The straightened wire is fed by pulling rollers through a knife bushing (fixed knife) into the channel of the receiving device, closed by a rail, to the flag of the measuring mechanism, which is installed in accordance with the required length of the rod to be cut. When the wire is pressed on the flag, the limit switch of the measuring mechanism is triggered, giving a signal to turn on the electromagnet of the cutting mechanism. While the cutting mechanism is turned on, the flag reaches the hard stop of the measuring mechanism and stops along with the reinforcing wire.
Designed for unwinding reinforcing steel from coil, pulling it through a straightening drum and feeding the straightened reinforcement bar into the receiving device. The mechanism is driven by electric power. engine through a belt drive and a pulley sitting on the output shaft.
Included in the package and price of the SMF 357 machine
Included in delivery for an additional fee
Supplied upon customer request for an additional fee
The straightening and cutting machine SMZH 357 for straightening and cutting reinforcing steel consists of the following main components:
The SMZH 357 machine consists of
The frame of the SMZH 357 machine is welded; all components of the machine are placed and secured on it. There are holes in the base for fastening the machine with anchor bolts. The feeding mechanism is designed to unwind wire and reinforcement from the coil, pull it through the correct drum and feed the straightened reinforcement rod into the receiving device. The mechanism is driven by an electric motor through a belt drive and a pulley sitting on the output shaft. With the help of a gear pair, rotation is transmitted to the camshaft. A gear sitting on the shaft transmits rotation through a gear to the lower shaft of the traction rollers. The shaft of the upper pulling roller rotates in the cage bearings and is connected to the shaft of the lower pulling roller using a gear pair. The clip swings around an axis that sits motionless in the body. The other end of the holder is connected through an axis to the mechanism for preloading the upper pulling roller. The pulling rollers are interchangeable with several grooves for reinforcing steel of different diameters. At the same time, the gear is engaged with a gear wheel that rotates freely on the shaft together with the coupling half. The movable half-coupling is mounted on the shaft splines and can move along it using a fork and rod. The clutch position is controlled by an activation mechanism with an electromagnet. In this case, the shafts of the cutting mechanism are coupled using a gear pair. The cutting mechanism is driven by a cam located at the end of the upper knife shaft. The force is transmitted through the roller and lever, swinging around an axis, to the rod. There is a spring inside the rod that serves to return the rod to its original position. The upper end of the spring rests against the plug, and its lower end rests against a finger fixedly fixed in the body. At the bottom of the rod there is a movable knife. The fixed knife is pressed against the movable threaded guide. A cam is installed on the lower knife shaft, which, through a roller and a lever, opens the channel of the receiving device. The lever swings around an axle, a rod, and a lever swings on the axle.
The correct drum of the SMZH357 machine is a shaft rotating in bearings. The bearings are installed in housings mounted on the frame. The drum is driven by an electric motor through a V-belt drive and a pulley. 
At the ends of the drum, fixed dies are installed along the axis. The dies are secured in the drum with adjustable bushings and a nut. In the middle part of the drum, adjustable dies are installed in the glasses. The glasses are shifted in the radial direction using levers and a roller with an adjusting screw. The drum is adjusted with one screw. The receiving device is used to receive straightened pieces of reinforcement, measure and collect cut rods. Consists of a two-meter section. The rack tilts back with the help of an electromagnet, opening the channel of the receiving device for ejecting rods. The rack is returned to its original position using springs, rods and levers attached to the rack. The shaft and guide are mounted in brackets attached to the rack with bolts and a pin. Around the finger, any of the sections following the first can be folded back. The shafts and guides of adjacent sections are connected by couplings. The unwinding device is designed for installing coils with a diameter of up to 1400 mm. In order to reduce wear on the inlet hole, a die made of a hard alloy (die) is inserted into it.
Under the force of the pulling rollers, the reinforcing wire unwinds from the unwinding device and, after passing through the fence, enters the correct drum, where, subjected to repeated alternating bending, it is straightened. The straightened wire is fed by pulling rollers through a knife bushing (fixed knife) into the channel of the receiving device, closed by a rail, to the flag of the measuring mechanism, which is installed in accordance with the required length of the rod to be cut. When the wire is pressed on the flag, the limit switch of the measuring mechanism is triggered, giving a signal to turn on the electromagnet of the cutting mechanism. While the cutting mechanism is turned on, the flag reaches the hard stop of the measuring mechanism and stops along with the reinforcing wire.
Designed for unwinding reinforcing steel from coil, pulling it through a straightening drum and feeding the straightened reinforcement bar into the receiving device. The mechanism is driven by electric power. engine through a belt drive and a pulley sitting on the output shaft.
The SMZH 357 (SPR-12) installation for straightening and cutting reinforcing steel consists of the following main components: a machine, receiving and unwinding devices, a straightening drum, electrical equipment, and a ruler.
The machine consists of a bed, feeding and cutting mechanisms, and a straightening drum.
The machine bed is welded; all machine components are placed and secured on it.
There are holes in the base for fastening the machine with anchor bolts.
The feeding mechanism is designed to unwind wire and reinforcement from the coil, pull it through the correct drum and feed the straightened reinforcement rod into the receiving device. The mechanism is driven by an electric motor through a belt drive and a pulley sitting on the output shaft.
With the help of a gear pair, rotation is transmitted to the camshaft. A gear sitting on the shaft transmits rotation through a gear to the lower shaft of the traction rollers. The shaft of the upper pulling roller rotates in the cage bearings and is connected to the shaft of the lower pulling roller using a gear pair. The clip swings around an axis that sits motionless in the body. The other end of the holder is connected through an axis to the mechanism for preloading the upper pulling roller.
The pulling rollers are interchangeable with several grooves for reinforcing steel of different diameters. At the same time, the gear is engaged with a gear wheel that rotates freely on the shaft together with the coupling half.
Diameter of processed rods, mm 3…….10
Smooth profile 3…….10
Periodic profile AI, AII, AIII 3…….8
Editing speed, m/min 31.5; 45
Length of cut rods, m 0.5….12
Drum rotation frequency, s-1 40/20
Length tolerance
cut rods, mm +1…-1
Installed power, kW 8.4/12.7
Dimensions. mm
Length 6100
Width 1500
Height 1250
Total weight, kg no more than 1700
Manufacturer of straightening machine model SMZh-357 enterprise - Unitech Novocheboksarsk.
On the Russian construction equipment market there are several domestic developers and manufacturers of machines for straightening and cutting reinforcement, and many foreign companies from China, Turkey, Bulgaria, Italy, etc.
The most famous Russian manufacturers of cutting and straightening machines:
Straightening machines can be reduced to two basic diagrams. The schemes cover modern and previously produced machines of domestic and foreign models.
The reinforcing wire is unwound from a coil 1 and pulled through a straightening device 2 or 3 by means of a pulling mechanism 4 or 5, measured to a given length by a measuring roller 6 or a limit switch 7 and cut by parallel (lever) knives 8 or rotating knives 9. To ensure high cutting accuracy All modern domestic machines are equipped with limit switches 7 and lever knives 8, but in operation there is a large fleet of machines with rotating knives 9, equipped with both a measuring roller 6 and limit switches 7, which replaced the measuring rollers. On some of these machines, rotating knives are replaced by lever knives with pneumatic drive.
Roller straightening devices 2 do not provide high-quality straightening of round bars and are not used on modern domestic straightening machines. As independent roller mechanisms are used in combination with machines for welding meshes and flat frames, in bending lines, as well as on both foreign and domestic machines for cutting short rods. In such machines, insufficient quality straightening is compensated by periodic welding, which gives a plastic hinge, or by the short length of the prepared rod, or by plastic deformation of bending.
Refilling the roller truing mechanisms and adjusting the pressure elements takes a long time and is carried out using the trial and error method. On multi-point mesh welding machines, each longitudinal rod has its own multi-roller straightening mechanism. Some difference in the lengths of the rods in the skeins makes it difficult to simultaneously thread all the longitudinal rods.
High quality of straightening due to volumetric multiple plastic bending is achieved on drum straightening mechanisms 3, used on almost all straightening machines in combination with roller pulling devices 5 and lever knives 8, which, while ensuring high accuracy of the length of the cut rods, reduces the reliability of the machines. On such machines, the rod stops while cutting, and the drum continues to rotate. If the drum has 3000 rpm, and the stopping time is only 0.5 s, then during this time 25 alternating bends will occur under the pressure elements in the areas of the pressure elements in which, except for the extreme ones, the stresses will exceed the yield strength. This can be avoided by using flying shears, which accompany the moving rod during the cutting process and return to its original position. The accumulation of low-cycle fatigue phenomena on machines where, while the rod is stopped, the drum is given a reciprocating motion along its axis, is reduced. Such technical solutions significantly complicate the design of machine tools.
Drum straightening mechanisms are equipped with pressure elements in the form of dies and dies, which leads to the emergence of sliding friction forces when pulling the rod and rotating the drum around it. This, in turn, leads to increased wear, which increases when switching to straightening of periodic profile rods (in this case, partial cutting of the profile protrusions is observed), as well as with an increase in the strength of the processed rods due to an increase in the interaction forces between the rod and the pressure elements. The use of carbide dies significantly increased their durability, but the forces generated during the straightening process remained the same, and the durability of the remaining machine components was low.
Filling drum mechanisms with rods requires great physical effort, especially when filling with rods of increased strength and large diameters. The time for filling and adjusting the eccentricities of the pressure elements by an experienced machine operator is 3 – 5 minutes. for rods of small diameters, 5 – 8 min. and more for rods of large diameters. When straightening coils weighing 80–100 kg, this takes 10–50% of the working time. The use of the machine improves with increasing weight of skeins (skeins weighing up to 1000 kg are received). The duration of adjustment of the straightening mechanism is explained by the uncertainty of wear of the pressure elements. The adjustment is carried out by trial selection of the eccentricities of the pressure elements. As a rule, the first few rods of each skein have a curvature greater than the permissible one and cannot be used. Increasing the mass of skeins reduces the amount of scrap, but in the process of straightening large skeins, due to wear of dies or dies (not carbide), the quality of straightening may be impaired, and in this case it is necessary to stop the machine and additionally adjust the pressure elements of the drum straightening mechanism.
The main disadvantages can be eliminated by improving the straightening mechanism, in which it is necessary to maintain volumetric plastic bending, but eliminate sliding friction. This is achieved by replacing drum straightening mechanisms with vibration ones equipped with roller pressure elements. The moving sections of the straightening mechanism perform plane-parallel movement along a circular path and provide deformation of the rod of the same nature as in the drum mechanism. When pulling the rod through vibrating straightening mechanisms, sliding friction is replaced by rolling friction, which makes it possible to reduce the pulling force by almost an order of magnitude. The sliding friction that occurred in drum straightening mechanisms, which was caused by the rotation of the pressure elements around the rod, is completely eliminated. The use of vibration straightening mechanisms instead of drum ones on straightening machines reduces the energy consumption of the machines or ensures straightening of large diameter rods and periodic profile rods without increasing the power of the machine, while eliminating the partial cutting of profile protrusions that occurs in drum mechanisms.
The SMZh-357 machine was developed in 1973 and has been mass-produced since 1975. Developed by PromStroyMash, Moscow.
The straightening and cutting machine SMZH357 is designed for straightening and cutting reinforcing steel (class A-II and A III) of smooth and periodic profiles supplied in coils in enclosed spaces at enterprises producing reinforced concrete products.
Installation for straightening and cutting of reinforcing steel - straightening and cutting machine works as follows:
Under the force of the pulling rollers, the reinforcing wire unwinds from the unwinding device and, after passing through the fence, enters the correct drum, where, subjected to repeated alternating bending, it is straightened. The straightened wire is fed by pulling rollers through a knife bushing (fixed knife) into the channel of the receiving device, closed by a rail, to the ramrod of the measuring mechanism, which is installed in accordance with the required length of the rod to be cut. When the wire is pressed onto the ramrod, the limit switch of the measuring mechanism is triggered, giving a signal to turn on the electromagnet of the cutting mechanism. During the activation of the cutting mechanism, the ramrod reaches the hard stop of the measuring mechanism and stops along with the reinforcing wire.
When triggered, the electromagnet of the cutting mechanism pulls out the wedge 45 of the rod 42 (see Fig. 4), which, moving with the fork, engages the knife shaft coupling half. A full cutting cycle occurs in half a revolution of the knife shafts, after which they are stopped in their original position by a locking mechanism. At the moment of cutting, the cam 40 located on shaft VI, turning, presses the cutting mechanism lever 52 and sets in motion the movable knife 53, which cuts the wire. Cam 36, located on shaft V, with some delay, through a system of levers, turns the shaft of the receiving device. In this case, the rail 56 moves, opening the channel of the receiving device, and the cut rod falls out. At the moment of fixation of shafts VI and V, the cutting mechanism, the mechanism for opening the channel of the receiving device and the cleaning rod return to their original position under the action of springs.
The installation for straightening and cutting reinforcing steel (Fig. 2) consists of the following main components:
The machine consists of a bed, feeding and cutting mechanisms and a straightening drum.
bed welded machine; All components of the machine are placed and secured on it. There are four holes in the base for fastening the machine with anchor bolts.
Feed mechanism(Fig. 3) is designed for unwinding reinforcing steel from coil, pulling it through a straightening drum and feeding the straightened reinforcement bar into the receiving device.
The mechanism is driven by an electric motor through a belt drive and a pulley 12 sitting on the output shaft 16.
Using a gear pair 14, 15, rotation is transmitted to the camshaft 4. The gear 13 sitting on the shaft, through a gear 11, transmits rotation to the lower shaft 10 of the pulling rollers 5. The shaft 6 of the upper pulling roller rotates in the bearings of the cage 7 and is connected to the shaft of the lower pulling roller using a gear pair 8, 9. Clip 7 swings around axis 3, stationary in the body. The other end of the holder is connected through axis 2 to the mechanism for preloading the upper pulling roller 1.
The pulling rollers are interchangeable with several grooves for reinforcing steel of different diameters.
At the same time, gear 23 (Fig. 4, item 13 in Fig. 3) is engaged with gear 32, which rotates freely on shaft V together with coupling half 33. The movable coupling half 34 is installed on the splines of shaft V and can move along it using a fork and rod 42. The position of the clutch is controlled by an activation mechanism with an electromagnet 48. Shafts V and VI are coupled using a gear pair 35, 39.
Cutting mechanism(Fig. 5) is driven from cam 9, sitting at the end of the upper knife shaft. The force is transmitted through the roller 8 and the lever 7, swinging around the axis 6, to the rod 5. Inside the rod 5 there is a spring 15, which serves to return the rod to its original position. Spring 15 with its upper end rests against plug 14, and with its lower end rests against pin 16, fixedly fixed in housing 13. At the bottom of rod 5 there is a movable knife 4. Fixed knife 3 is installed in glass 2, fixedly fixed in housing 13. Fixed knife is pressed against the movable threaded guide 12. A cam 10 is installed on the lower knife shaft, which, through a roller 11 and a lever 20, opens the channel of the receiving device. Lever 20 swings around axis 1, rod 19 and lever 18, swinging on axis 17.
Correct drum(Fig. 6) is a shaft 6 rotating in bearings 5. The bearings are installed in housings 4, mounted on the frame. The drum is driven by an electric motor through a V-belt drive and pulley 3. At the ends of the drum, fixed dies 2 are installed along the axis (1 piece on the output side, 2 pieces on the input side). The dies are secured in the drum by adjustable bushings 13 and nut 1.
In the middle part of the drum, adjustable dies 15 are installed in glasses 7, 10, 12. The glasses are shifted in the radial direction using levers 8 and 11, a roller 9 and an adjusting screw 14. The drum is adjusted using one screw 14.
Receiver(Fig. 7 shows its first section) is used to receive a straightened piece of reinforcement, measure and collect the cut rods. It consists of three two-meter sections connected in series. The section consists of a guide 2 with two channels, a folding rail 3, a shaft 4, brackets 13, 7 and racks 6.
Rail 3, using brackets 13, is connected to shaft 4, fixed in bushings 1 and 5, when rotated, the rail tilts back, opening the channel of the receiving device for discharging the rod. The rack is returned to its original position using a spring 9, a rod 10 and a lever 11 mounted on a shaft 4. The shaft and guide 2 are installed in brackets 7, attached to the rack with bolts 12 and a pin 8. Around the pin, any of the sections following the first can be folded back.
Shafts and guides adjacent sections are connected by couplings.
A measuring mechanism can be installed at the end of any section (Fig. 8); To do this, the body 8 of the mechanism is put on the end of the guide and clamped with bolts 9 so that the cleaning rod 4, fixed in the slider 3, freely fits into the channel of the receiving device. The slider slides along axis 7 and is spring-loaded by spring 1. The travel of the slider is limited by an adjustable stop 2. A flag 6 is attached to the bottom of the slider, acting on the limit switch 5.
Unwinding device(see Fig. 2, item 6) is intended for installation of coils with a diameter of up to 1500 mm. Sliding racks allow you to install reinforcement steel coils with different internal diameters.
There is an adjustable friction brake at the bottom of the device.
Guardrail with refilling device(see Fig. 2 and 5) is designed to ensure the safety of the operating personnel and has a device made in the form of a pincer gripper to facilitate filling the fittings into the correct drum.
In order to reduce wear on the inlet hole, a die made of a hard alloy (die) is inserted into it.
In the electrical circuit diagram (Fig. 9), power supply is provided from a four-wire three-phase network with a voltage of 220/380 V, 50 Hz. Power circuit voltage 330 V. Control circuit voltage 220 V, power consumption (maximum) 14.4 kW, duty cycle = 100%.
Control provided using a button panel built into the machine.
Switching motor speeds provided using switches B4, B5 located in the electrical cabinet.
By pressing the Kn2 button with the mnemonic designation 0/0, the circuit of the starter coils P1, RZ is closed. The RZ contacts bypass the braking resistance of the feed motor. The electric motors of the drum Ml and feed M2 are turned on by the contacts of the starter PL
When the fittings reach the limit switch B8, the circuit of the coil P4 is closed. Contacts P4 close the circuit of the electromagnet coil of the knife shafts - cutting is carried out, while the limit switch B9 closes the circuit of the coil P5, and contacts P5 opens the circuit of the electromagnet coil of the electromagnet. The next cut occurs after limit switch B8 is released and pressed again.
In addition, a cut can be made by pressing the KnZ button with the mnemonic symbol V. If the cut does not occur during the installation of the P8 time relay, which is set depending on the length of the reinforcement being cut and the feed speed, the P8 contacts will open the control circuit (similar to the “stop” button).
Limit switch B8 is connected to the control circuit through plug connectors Ш1...Ш4, located: Ш1 on the rear wall of the electrical cabinet; Ш2...Ш4 on the corresponding sections of the receiving device.
Stopping electric motors is carried out by pressing the mushroom button, which opens the circuit of the coils of the starters P1 and RZ.
The speed control relay Pks is connected to the shaft of the drum electric motor. When the electric motor of the drum reaches a speed close to the maximum, contacts Pks and P1 close the circuit of the coil P6.
After the starter P1 is turned off, contacts P6 and P1 close the coil circuit of the starter P2 and the electric motors Ml, M2 are braked in the back-off mode. With a drop in the speed of the drum electric motor, the Pks contacts in the P6 coil circuit open. Contacts P6 opens the circuit of coil P2 - stop.
| Parameter name | SMZh-357 | |
|---|---|---|
| Basic machine parameters | ||
| Maximum diameter of smooth profile rods processed, mm | 4..10 | |
| The largest diameter of processed rods of periodic profile, mm | 6..8 | |
| Editing speed, m/min | 31,5; 45; 63; 90 | |
| Length of cut rods, m | 2..9 | |
| Permissible deviations in the length of cut rods, mm | +3..-5 | |
| Drum rotation frequency, 1/s | 40/ 20 | |
| Electric motor, kW | 12,7/ 16,6 | |
| Dimensions and weight of the machine | ||
| Machine dimensions (length x width x height), mm | 2093 x 330 x 932 | |
| Machine weight, kg | 1900 |
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