Bending machine is divided into manual bending machine, hydraulic bending machine and numerical control bending machine. According to the synchronization mode, hydraulic bending machine can be divided into: torsion shaft synchronization, mechanical hydraulic synchronization and electro-hydraulic synchronization. According to the movement mode, hydraulic bending machine can be divided into: upward movement type and downward movement type. Comprises a bracket, a workbench and a splint, wherein the workbench is arranged on the bracket; The workbench consists of a base and a pressure plate; The base is connected with the splint through a hinge; The base consists of a seat shell, a coil and a cover plate; The coil is arranged in the groove of the seat shell; And the top of the groove is covered with a cover plate. When in use, the coil is electrified through the wire, and after electrification, attractive force is generated on the pressure plate, thereby clamping the thin plate between the pressure plate and the base. Due to the electromagnetic force clamping, the pressure plate can be made into various workpiece requirements, and the workpiece with side wall can be processed. Bending machine can meet the needs of various workpieces by changing the die of bending machine! Juquan numerical control Bangui
Working principle of bending machine
The bending machine comprises a bracket, a workbench and a splint, wherein the workbench is arranged on the bracket; The workbench consists of a base and a pressure plate; The base is connected with the splint through a hinge; The base consists of a seat shell, a coil and a cover plate; The coil is arranged in the groove of the seat shell; And the top of the groove is covered with a cover plate. When in use, the coil is electrified through the wire, and after electrification, attractive force is generated on the pressure plate, thereby clamping the thin plate between the pressure plate and the base. Due to the electromagnetic force clamping, the pressure plate can be made into various workpiece requirements, and the workpiece with side wall can be processed, and the operation is very simple.
Bending machine procurement
Potential buyers should carefully consider what to buy from the end use of the machine, the known possible deflection of the machine and the bending radius of the parts before paying. The first thing to consider is the parts you want to produce. The key point is to buy a machine that can complete the processing task with the shortest workbench and the smallest tonnage. Carefully consider the material grade and the maximum processing thickness and length. If most of the works are low carbon steel, the thickness is 16, and the maximum length is 10 feet, the free bending force need not be greater than 50 tons. But if you are engaged in forming a large number of concave dies with bottoms, maybe you should consider a 150 tonnage machine tool. Well, suppose the thickest material is 65,438+0/4 inch, the free bending at 65,438+000 feet is 65,438+065 tons, and the bending (correction bending) with the bottom die is at least 600 tons. If most of the workpieces are 5 feet or shorter, the tonnage will be almost halved, thus greatly reducing the procurement cost. The length of the parts is very important to determine the specifications of the new machine. Under the same load, the deflection of the workbench and slider of the 10 foot machine is four times that of the 5 foot machine. In other words, shorter machines require less gasket adjustment to produce qualified parts. Reducing gasket adjustment shortens the preparation time. Material grade is also a key factor. Compared with low carbon steel, the load required by stainless steel usually increases by about 50%, while the soft aluminum of most brands decreases by about 50%. You can always get the tonnage table of the machine from the manufacturer of the bending machine, which shows the tonnage estimation required per foot length under different thicknesses and materials. When the bending radius of the part is free bending, the bending radius is 0. 156 times of the mold opening distance. In the process of free bending, the opening distance of the female die should be 8 times of the thickness of the metal material. For example, when 16 mild steel is formed with an opening distance of 1/2 inches, the bending radius of the part is about 0.078 inches. If the bending radius is almost as small as the thickness of the material, it must be formed by female die with a bottom. However, the pressure required to form a female die with a bottom is about 4 times greater than that required for free bending. If the bending radius is less than the thickness of the material, a punch with the radius of the front fillet less than the thickness of the material should be adopted and the stamping bending method should be resorted to. Thus, a free bending pressure of 10 times is required. As far as free bending is concerned, the punch and die are machined at an angle of 85 or less (the smaller the better). When using this set of dies, we should pay attention to the clearance between the punch and the die at the bottom of the stroke and the excessive bending enough to compensate the rebound, and keep the material at about 90. Generally, the springback angle of the free bending die on the new bending machine is ≤ 2, and the bending radius is equal to 0. 156 times the die opening distance. For the bending of a concave die with a bottom, the die angle is generally 86 ~ 90. At the bottom of the stroke, there should be a gap slightly larger than the thickness of the material between the convex and concave dies. The forming angle is increased, because the tonnage of bottom die bending is large (about 4 times that of free bending), which reduces the stress that usually causes springback within the bending radius. The stamping bending is the same as that of the bottomed female die, except that the front end of the punch is machined to the required bending radius, and the gap between the punch and the female die at the bottom of the stroke is less than the material thickness. Because enough pressure (about 10 free bending) is applied to force the front end of the punch to contact the material, rebound is basically avoided. In order to choose the specification with the lowest tonnage, it is best to plan the bending radius larger than the material thickness and adopt the free bending method as far as possible. When the bending radius is large, it often does not affect the quality of finished products and future use. The precision requirement of precision bending is a factor that needs careful consideration. It is this factor that determines whether you need to consider CNC bending machine or manual bending machine. If the bending accuracy requires 1 and cannot be changed, you must focus on CNC machine tools. The repetitive precision of the slider of the CNC bending machine is 0.0004 inch, so it is necessary to use such precision and a good mold to form an accurate angle. The repetitive precision of the slide block of the manual bending machine is 0.002 inch, and the deviation of 2 ~ 3 will generally occur when the appropriate die is used. In addition, the CNC bending machine is ready for rapid mold assembly, which is undoubtedly considered when you need to bend many small batch parts. Moulds Even if you have a shelf full of moulds, don't think that these moulds are suitable for newly bought machines. The wear of each die must be checked by measuring the length from the front end of the male die to the shoulder and the length between the shoulders of the female die. For traditional molds, the deviation per foot should be about 0.00 1 inch, and the total length deviation should not exceed 0.005 inch. As for the fine grinding mold, the accuracy per foot should reach 0.0004 inch, and the total accuracy should not be greater than 0.002 inch. It is best to use fine grinding die for numerical control bending machine and conventional die for manual bending machine. It is assumed that the side length of the bending piece is bent 90 degrees along the 5× 10 low carbon steel plate. The bending machine must apply 7.5 tons of extra pressure to jack up the steel plate, and the operator must be prepared to drop the 280-pound ruler. It may take several strong workers or even a crane to make this part. Bending machine operators often need to bend long parts, but they don't realize how hard their work is. At present, there is a material supporting device suitable for workshops engaged in this kind of work, which can be improved according to the needs of new and old machines. With this device, only one person is needed to operate the long side part.
How to use the bending machine
Brief introduction of processing Q235 plate with common hydraulic bending machine: 1. First turn on the power supply, turn on the key switch on the control panel, and then press the oil pump to start, so that you can hear the rotation sound of the oil pump. (The machine is not moving at this time) 2. Travel adjustment. When using the bending machine, you must pay attention to adjusting the stroke and try it before bending. When the upper die of the bending machine goes down to the bottom, the gap of plate thickness must be ensured. Otherwise, the mold and machine will be damaged. The adjustment of stroke also includes electric quick adjustment and manual gastric adjustment. 3. The choice of bending notch, generally should choose 8 times the width of the plate thickness notch. If you bend a 4 mm sheet, you need to select about 32 cuts. 4. General rear gear adjustment includes electric quick adjustment and manual fine adjustment, and the method is the same as that of shearing machine. 5. Press the foot switch to start bending. Unlike the shearing machine, the bending machine can be released at any time. When the foot switch is released, the bender will stop and continue to descend.
Safety operation procedures of bending machine
1. Strictly abide by the safety operation rules of machine tool workers and wear labor protection articles as required. 2. Before starting the machine, carefully check whether the motor, switch, line and grounding are normal and firm, and check whether the operating parts and buttons of the equipment are stuck in the correct position. 3. Check the consistency and firmness of the upper and lower molds; Check whether each positioning device meets the processing requirements. 4. When the upper slide plate and the positioning shafts are not at the origin, run the program of returning to the origin. 5. Idle after the equipment is started 1-2 minutes, and skateboard for 2-3 times. If abnormal sound or fault is found, stop the machine immediately and the fault will be eliminated. Only when everything is normal can it work. 6. At work, 1 person should be under unified command, so that the operator can closely cooperate with the feeding and pressing personnel, and then signal bending after ensuring that the cooperating personnel are in a safe position. 7. When the metal plate is bent, it must be pressed tightly to prevent the metal plate from tilting and hurting people. 8. The power supply must be cut off when adjusting the mold, and it shall be carried out after stopping the operation. 9. When changing the opening of the variable lower die, no material is allowed to contact the lower die. 10. People are not allowed to stand behind the machine tool when it is working. 1 1. It is strictly forbidden to press the folded plate at one end alone. 12. If it is found that the workpiece or die is not straight during operation, the machine should be stopped for correction. It is forbidden to correct by hand during operation to prevent hand injury. 13. It is forbidden to fold ultra-thick iron plate or quenched steel plate, advanced alloy steel, square steel and plates exceeding the performance of the bending machine, so as not to damage the machine tool. 14. Always check the coincidence degree of the upper and lower molds; Whether the indication of pressure gauge meets the requirements. 15. In case of any abnormal situation, stop the machine immediately, check the reason and eliminate it in time. 16. Before stopping, put a pad on the lower die below the oil cylinders on both sides, and lower the upper slide plate onto the pad. 17. Exit the control system program first, and then cut off the power supply.
Maintenance and maintenance of bending machine
Before machine tool maintenance or cleaning, the upper die should be aligned with the lower die, and then put down and closed until the work is completed. If startup or other operations are needed, manual mode should be selected to ensure safety. Its maintenance contents are as follows: 1, hydraulic oil circuit A. Check the oil level of the oil tank every week, and if the hydraulic system is repaired, check it. If the oil level is lower than the oil window, add hydraulic oil; B. The hydraulic oil used in this machine is ISO HM46 or mobildte25c. The oil should be changed after the new machine works for 2000 hours, and then the oil tank should be cleaned every 4000 ~ 6000 hours. D the system oil temperature should be between 35℃ and 60℃, and should not exceed 70℃. If it is too high, it will lead to deterioration and damage of oil quality and accessories. 2. Filter element A. Replace the filter element or thoroughly clean it every time you change the oil; B. The machine tool has related alarms or other filter abnormalities such as unclean oil quality, and should be replaced; C check and clean the air filter on the fuel tank every 3 months, and it is best to replace it every 1 year. 3. Hydraulic components A. Clean hydraulic components (bottom plate, valves, motors, pumps, etc.). ) prevent dirt from entering the system every month, and do not use cleaning agents; B. After the new machine is used for one month, check whether there is any deformation at each bend. If it is abnormal, it should be replaced. After two months of use, all fittings should be fastened. When doing this work, it should be shut down and the system has no pressure.
cnc bending machine
Structure and characteristics: 1. All-steel welded structure with sufficient strength and rigidity. 2. Hydraulic transmission, in which the cylinders at both ends of the machine tool are placed on the slider to directly drive the sliding work. 3. The slider synchronization mechanism adopts torsion shaft for forced synchronization. 4. Adopt mechanical stop structure, which is stable and reliable. 5. The slider stroke can be adjusted quickly, fine-tuned manually and displayed by the counter. 6. Inclined wedge deflection compensation mechanism to ensure high bending accuracy. The bending machine comprises a bracket, a workbench and a splint, wherein the workbench is arranged on the bracket; The workbench consists of a base and a pressure plate; The base is connected with the splint through a hinge; The base consists of a seat shell, a coil and a cover plate; The coil is arranged in the groove of the seat shell; And the top of the groove is covered with a cover plate. When in use, the coil is electrified through the wire, and after electrification, attractive force is generated on the pressure plate, thereby clamping the thin plate between the pressure plate and the base. Due to the electromagnetic force clamping, the pressure plate can be made into various workpiece requirements, and the workpiece with side wall can be processed.
How to use the bending machine
Brief introduction of processing Q235 plate with common hydraulic bending machine: 1. First turn on the power supply, turn on the key switch on the control panel, and then press the oil pump to start, so that you can hear the rotation sound of the oil pump. (The machine is not moving at this time) 2. Travel adjustment. When using the bending machine, you must pay attention to adjusting the stroke and try it before bending. When the upper die of the bending machine goes down to the bottom, the gap of plate thickness must be ensured. Otherwise, the mold and machine will be damaged. The adjustment of stroke also includes electric quick adjustment and manual gastric adjustment. 3. The choice of bending notch, generally should choose 8 times the width of the plate thickness notch. If you bend a 4 mm sheet, you need to select about 32 cuts. 4. General rear gear adjustment includes electric quick adjustment and manual fine adjustment, and the method is the same as that of shearing machine. 5. Press the foot switch to start bending. Unlike the shearing machine, the bending machine can be released at any time. When the foot switch is released, the bender will stop and continue to descend. Maintenance and repair of bending machine: Before the machine tool is maintained or wiped, the upper die should be aligned with the lower die, and then it should be put down and stopped until the work is finished. If startup or other operations are needed, manual mode should be selected to ensure safety. Its maintenance contents are as follows: 1, hydraulic oil circuit A. Check the oil level of the oil tank every week, and if the hydraulic system is repaired, check it. If the oil level is lower than the oil window, add hydraulic oil; B. The hydraulic oil used in this machine is ISO HM46 or mobildte25c. The oil should be changed after the new machine works for 2000 hours, and then the oil tank should be cleaned every 4000 ~ 6000 hours. D the system oil temperature should be between 35℃ and 60℃, and should not exceed 70℃. If it is too high, it will lead to deterioration and damage of oil quality and accessories. 2. Filter element A. Replace the filter element or thoroughly clean it every time you change the oil; B. The machine tool has related alarms or other filter abnormalities such as unclean oil quality, and should be replaced; C check and clean the air filter on the fuel tank every 3 months, and it is best to replace it every 1 year. 3. Hydraulic components A. Clean hydraulic components (bottom plate, valves, motors, pumps, etc.). ) prevent dirt from entering the system every month, and do not use cleaning agents; B. After the new machine is used for one month, check whether there is any deformation at each bend. If it is abnormal, it should be replaced. After two months' use, the joints of all accessories should be fastened, and the machine should be shut down when doing this work. The pressureless hydraulic bending machine of the system includes a bracket, a workbench and a splint. The workbench is placed on the bracket, and the workbench consists of a base and a pressure plate. The base is connected with the splint through a hinge. The base consists of a shell, a coil and a cover plate. The coil is placed in the groove of the housing. When in use, the coil is electrified through the wire, and after electrification, attractive force is generated on the pressure plate, thereby clamping the thin plate between the pressure plate and the base. Due to the electromagnetic force clamping, the pressure plate can be made into various workpiece requirements, and the workpiece with side wall can be processed. Structure and characteristics: 1. All-steel welded structure with sufficient strength and rigidity. 2. Hydraulic transmission, in which the cylinders at both ends of the machine tool are placed on the slider to directly drive the sliding work. 3. The slider synchronization mechanism adopts torsion shaft for forced synchronization. 4. Adopt mechanical stop structure, which is stable and reliable. 5. The slider stroke can be adjusted quickly, fine-tuned manually and displayed by the counter. 6. Inclined wedge deflection compensation mechanism to ensure high bending accuracy. How to use the bending machine: According to the common hydraulic bending machine for processing Q235 plate: 1, make a brief introduction. First turn on the power supply, turn on the key switch on the control panel, and then press the oil pump to start, so that you can hear the rotation sound of the oil pump. (The machine is not moving at this time) 2. Travel adjustment. When using the bending machine, you must pay attention to adjusting the stroke and try it before bending. When the upper die of the bending machine goes down to the bottom, the gap of plate thickness must be ensured. Otherwise, the mold and machine will be damaged. The adjustment of stroke also includes electric quick adjustment and manual gastric adjustment. 3. The choice of bending notch, generally should choose 8 times the width of the plate thickness notch. If you bend a 4 mm sheet, you need to select about 32 cuts. 4. General rear gear adjustment includes electric quick adjustment and manual fine adjustment, and the method is the same as that of shearing machine. 5. Press the foot switch to start bending. Unlike the shearing machine, the bending machine can be released at any time. When the foot switch is released, the bender will stop and continue to descend.
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