Plate pressing machine for workpiece straightening
By introducing an adjusting slider and a tapered cylinder limiting sleeve into the press, the press achieves flexible adjustment and precise positioning, solving the problems of limited straightening range and low precision of traditional presses, and improving the applicability and accuracy of workpiece straightening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG XIHE MASCH CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional platen presses have difficulty adjusting straightening parameters during the straightening process, resulting in poor straightening effects on workpieces of different specifications and degrees of deformation. Furthermore, the limiting is not precise enough, which can easily lead to workpiece offset and shaking, affecting straightening accuracy and efficiency.
A workpiece straightening press plate machine was designed. Adjustment grooves are provided on the inner walls of the left and right sides of the straightening frame, adjustment sliders are installed, and a conical cylinder and a limiting sleeve are set on the straightening roller assembly. Precise positioning and guidance are achieved by using the bolt body and the limiting screw groove. Combined with electric push rod and drive motor, the height and position can be flexibly adjusted.
It expands the applicability of the equipment, improves the straightening accuracy and efficiency, and can adapt to the needs of workpieces with different thicknesses and degrees of deformation, preventing the workpieces from shifting and shaking during the straightening process.
Smart Images
Figure CN224195638U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure plate machine technology, specifically a pressure plate machine for workpiece straightening. Background Technology
[0002] In industries such as machinery manufacturing and metallurgical processing, workpieces are prone to bending and deformation during production, transportation, or storage due to external impacts, temperature changes, and other factors. If these deformed workpieces are used directly, they will not only affect subsequent assembly accuracy and product quality but may also pose safety hazards during use. Therefore, straightening deformed workpieces is one of the key processes for ensuring product quality.
[0003] Currently, there are many types of workpiece straightening equipment on the market, among which the pressure plate machine is one of the commonly used straightening devices. However, traditional pressure plate machines have many shortcomings in use. On the one hand, the position and spacing of the straightening rollers are mostly fixed, making it difficult to flexibly adjust them according to workpieces of different specifications and degrees of deformation, resulting in a limited straightening range and poor straightening effect for some special-shaped or sized workpieces. On the other hand, the workpiece limiting during the straightening process is not precise enough, which can easily lead to workpiece offset and shaking, affecting the straightening accuracy. In addition, the adjustment structure of some straightening equipment is complex and inconvenient to operate, reducing the efficiency of the straightening work.
[0004] To address the aforementioned issues, a workpiece straightening press is needed that can flexibly adjust straightening parameters and improve straightening accuracy and efficiency to meet the straightening requirements of different workpieces. Utility Model Content
[0005] The purpose of this utility model is to provide a workpiece straightening press machine to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a workpiece straightening press plate machine, comprising a press plate machine base, a straightening frame mounted on the upper front side of the press plate machine base, and a press plate frame mounted on the upper rear side of the press plate machine base; straightening roller assemblies are mounted at both the upper and lower ends of the straightening frame, and adjustment grooves are provided on the upper ends of the inner walls on both the left and right sides of the straightening frame; an adjustment slider is installed inside each adjustment groove, and the upper straightening roller assembly is mounted between the two adjustment sliders; the straightening roller assembly includes a straightening roller, and two conical cylinders are fitted around the straightening roller, with the two conical cylinders arranged opposite to each other; a press plate plate is mounted inside the press plate frame.
[0007] As a preferred embodiment of the workpiece straightening press of this utility model, the rear sidewalls of the two conical cylinders are each equipped with a limiting sleeve, the outer walls of both sides of the straightening roller are provided with a set of limiting screw grooves, the sidewalls of the limiting sleeves are provided with limiting screw holes, and the internal parts of the limiting screw holes and limiting screw grooves are screwed with bolt bodies.
[0008] As a preferred embodiment of the workpiece straightening press plate machine of this utility model, the bottom end of the bolt body is provided with a circular groove, and a bolt rod is installed inside the circular groove. The bolt rod is screwed into the limiting screw hole and the limiting screw groove.
[0009] As a preferred embodiment of the workpiece straightening press plate machine of this utility model, a fixing ring is installed on the outer upper end of the bolt rod, and an annular pressure plate, a spring and an annular rubber sheet are fitted on the circumferential surface of the bolt rod, with an extrusion block installed at the upper edge of the annular rubber sheet.
[0010] As a preferred embodiment of the workpiece straightening press of this utility model, the outer wall of the bolt body is provided with an arc surface, and the surface of the arc surface is provided with anti-slip texture.
[0011] As a preferred embodiment of the workpiece straightening press of this utility model, guide columns are installed at both ends of the inner side of the adjusting groove, and guide holes are opened on both sides of the top of the adjusting slider. The adjusting slider is sleeved on the outside of the guide columns through the guide holes. An electric push rod is installed at the top of the inner side of the adjusting groove, and the driving end of the electric push rod is connected to the adjusting slider.
[0012] As a preferred embodiment of the workpiece straightening press of this utility model, a drive motor is installed at the lower end of the outer wall of the straightening frame, and the straightening roller in the lower straightening roller assembly is connected to the drive end of the drive motor.
[0013] Compared with the prior art, the beneficial effects of this utility model are: the setting of the workpiece straightening pressure plate machine has a reasonable structural design;
[0014] The straightening frame of this press has adjustment grooves on the upper part of the inner walls on both sides. Adjusting sliders are installed in these grooves, and the upper straightening roller assembly is mounted between two adjusting sliders. By moving the adjusting sliders within the adjustment grooves, the height of the upper straightening roller assembly can be easily adjusted, thereby changing the distance between the upper and lower straightening roller assemblies. This structural design allows the equipment to adapt to the straightening needs of workpieces of different thicknesses and degrees of deformation, expanding its applicability.
[0015] The straightening roller assembly consists of two conical cylinders positioned opposite each other, with a limiting sleeve installed on the rear side wall of each cylinder. A set of limiting screw grooves is formed on the outer walls of both sides of the straightening roller. The limiting screw holes on the side walls of the limiting sleeves are screwed into the limiting screw grooves via bolts. By adjusting the screw positions of the bolts within different limiting screw grooves, the position of the conical cylinders on the straightening roller can be adjusted, allowing for precise positioning of the conical cylinders according to the shape and size of the workpiece. The two oppositely positioned conical cylinders provide excellent guidance and limiting for the workpiece, effectively preventing workpiece displacement and wobbling during the straightening process, thus significantly improving straightening accuracy. Attached Figure Description
[0016] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;
[0017] Figure 2 This is a schematic diagram of the straightening roller assembly of this utility model;
[0018] Figure 3 This is a schematic diagram of part A of the present utility model;
[0019] Figure 4 This is a schematic diagram of the bolt body of this utility model.
[0020] In the diagram: 1. Press machine base; 2. Straightening frame; 3. Press plate frame; 4. Drive motor; 5. Straightening roller assembly; 51. Straightening roller; 52. Conical cylinder; 53. Limiting sleeve; 54. Limiting screw groove; 55. Limiting screw hole; 56. Bolt body; 561. Circular groove; 562. Annular rubber sheet; 563. Bolt rod; 564. Extrusion block; 565. Annular pressing plate; 567. Spring; 6. Press plate plate; 7. Adjusting groove; 8. Adjusting slider; 9. Guide post; 10. Guide hole; 11. Electric push rod. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-4 This utility model provides a technical solution:
[0023] In this technical solution, a workpiece straightening press plate machine includes a press plate machine base 1. A straightening frame 2 is mounted on the upper front side of the press plate machine base 1, and a press plate frame 3 is mounted on the upper rear side of the press plate machine base 1. Straightening roller assemblies 5 are mounted on both the upper and lower ends of the straightening frame 2. Adjustment grooves 7 are opened on the upper ends of the inner walls on both the left and right sides of the straightening frame 2. An adjustment slider 8 is installed inside each adjustment groove 7. The upper straightening roller assembly 5 is mounted between two adjustment sliders 8. The straightening roller assembly 5 includes a straightening roller 51. Two conical cylinders 52 are fitted on the outside of the straightening roller 51, and the two conical cylinders 52 are arranged opposite to each other. A press plate plate 6 is mounted inside the press plate frame 3.
[0024] The base 1 of the pressure plate machine serves as the fundamental support structure for the entire equipment. It is typically made of high-strength steel, such as Q345B, and its dimensions are determined based on the overall equipment design and the maximum size and weight of the workpiece to be straightened. For example, for common pressure plate machines used for straightening small workpieces, the base length may be 1-2 meters, the width 0.8-1.5 meters, and the thickness 0.1-0.2 meters to ensure sufficient stability and load-bearing capacity. The straightening frame 2 and the pressure plate frame 3 are fixed to the base 1 of the pressure plate machine by welding or bolting. Welded connections offer higher connection strength and stability, suitable for applications requiring high equipment rigidity; bolted connections facilitate installation and disassembly, making equipment transportation, debugging, and maintenance easier. In practical applications, if the straightening frame 2 and the pressure plate frame 3 bear a large load and the equipment experiences minimal vibration during operation, welding connections are preferred; if the equipment requires frequent structural adjustments or maintenance, bolted connections are more suitable.
[0025] The straightening frame 2 and the pressure plate frame 3 are made of high-strength steel similar to that of the base to ensure the overall structural strength. Rubber shock-absorbing pads are installed at the four corners of the bottom of the base. The hardness and thickness of the rubber shock-absorbing pads can be selected according to the vibration frequency and amplitude of the equipment during operation. Generally, the hardness is between Shore A50-70 and the thickness is 2-5 cm.
[0026] The straightening roller assembly 5 is a key component for workpiece straightening. Its quantity and arrangement depend on the shape, size, and straightening requirements of the workpiece. For slender shaft-like workpieces, multiple sets of straightening roller assemblies 5 may be used for segmented straightening to ensure straightening accuracy. The straightening roller assembly 5 is usually mounted on the straightening frame 2 via bearings to reduce frictional resistance during rotation and improve straightening efficiency. The adjusting groove 7 is generally a rectangular groove with high dimensional accuracy requirements. The groove width tolerance is controlled within ±0.1-±0.2 mm, and the groove depth tolerance is controlled within ±0.2-±0.3 mm to ensure that the adjusting slider 8 can slide smoothly within the groove and has good positioning accuracy. The length of the adjusting groove 7 is determined based on the maximum stroke that the upper straightening roller assembly 5 needs to adjust. For example, if the upper straightening roller assembly 5 needs to be adjusted by 50-100 mm in the vertical direction, then the length of the adjusting groove 7 should be increased by a certain margin, such as 120-150 mm.
[0027] The straightening roller assembly 5 is made of wear-resistant alloy steel, such as 42CrMo. After heat treatment processes such as quenching and tempering, the surface hardness can reach HRC50-55, thereby improving the wear resistance and service life of the straightening roller. The surface roughness requirement of the adjusting groove 7 is generally controlled at Ra value of 1.6-3.2μm to reduce the friction between the adjusting slider 8 and the adjusting groove 7.
[0028] The adjusting slider 8 and the adjusting groove 7 are fitted with a clearance, which is generally controlled between 0.05 and 0.15 mm. This ensures that the adjusting slider 8 can slide freely within the adjusting groove 7 while preventing wobbling due to excessive clearance, which would affect the straightening accuracy. The adjusting slider 8 is connected to the upper straightening roller assembly 5 by bolts or pins. The connection should have sufficient strength and rigidity to ensure that the upper straightening roller assembly 5 can stably follow the adjusting slider 8 during adjustment and straightening. For example, high-strength bolts of M10-M16 can be used for connection. The tightening torque of the bolts can be determined according to the bolt specifications and material properties according to relevant standards, generally between 50 and 100 N·m.
[0029] The material of the adjusting slider 8 is the same or similar steel as that of the straightening frame 2, such as Q235, and it undergoes appropriate surface treatment, such as galvanizing, to improve its rust resistance.
[0030] The straightening roller 51 is typically cylindrical, with its diameter and length determined by the workpiece size and straightening requirements. For smaller workpieces, the diameter of the straightening roller 51 may be 30-50 mm, and the length 100-200 mm; for larger workpieces, the diameter and length of the straightening roller 51 are correspondingly increased. The straightening roller 51 requires a high surface roughness, generally with an Ra value controlled between 0.4-0.8 μm, to reduce scratches on the workpiece surface. Two opposing conical cylinders 52 can be adjusted according to the shape and size of the workpiece, with their taper typically between 1:5 and 1:10. By adjusting the position of the conical cylinders 52 on the straightening roller 51, the straightening requirements of workpieces with different diameter ranges can be accommodated. For example, when straightening a workpiece with a diameter of 20-30 mm, the distance between the two conical cylinders 52 is adjusted to approximately 25 mm, ensuring good contact between their conical surfaces and the workpiece surface, providing guidance and limiting.
[0031] The pressure plate 6 is used for further flattening of the straightened workpiece. Its shape is generally circular or rectangular, and its size is determined by the maximum size of the workpiece, ensuring complete coverage of the flattened area. The pressure plate 6 is typically connected to the pressure plate frame 3 via a hydraulic or pneumatic cylinder to move up and down and apply pressure to the workpiece. For example, a hydraulic cylinder with a stroke of 100-200 mm can be used to drive the pressure plate 6. The working pressure of the hydraulic cylinder can be adjusted according to the material and thickness of the workpiece, generally between 5-10 MPa. A rubber pad or other flexible material can be installed on the bottom surface of the pressure plate 6 to increase the contact area with the workpiece and prevent damage to the workpiece surface during flattening. The thickness of the rubber pad is generally 5-10 mm.
[0032] The connection between the pressure plate 6 and the drive unit uses a flange connection to ensure reliable connection. The motion accuracy requirement for the pressure plate 6 is that the straightness error in the vertical direction should be controlled within ±0.1-±0.2 mm to ensure uniform and consistent flattening effect on the workpiece.
[0033] In some technical solutions, limit sleeves 53 are installed on the rear side walls of the two conical cylinders 52, and a set of limit screw grooves 54 are opened on both outer walls of the straightening roller 51. Limit screw holes 55 are opened on the side walls of the limit sleeves 53, and bolt bodies 56 are screwed into the interior of the limit screw holes 55 and the limit screw grooves 54.
[0034] The limiting sleeve 53 is generally made of the same or similar material as the conical cylinder 52 and is fixed to the rear wall of the conical cylinder 52 by welding or tight fitting. The number and spacing of the limiting screw grooves 54 are designed according to the straightening requirements. Generally, there are 5-10 limiting screw grooves 54 in each group, and the spacing between adjacent screw grooves is 10-20 mm. The bolt body 56 is usually made of high-strength bolts, such as grade 8.8 or 10.9 bolts. Its specifications are determined according to the size of the straightening roller 51 and the limiting sleeve 53, generally M8-M12. By screwing the bolt body 56 into the limiting screw grooves 54 and limiting screw holes 55 at different positions, the position of the conical cylinder 52 on the straightening roller 51 can be precisely adjusted, thereby adapting to the straightening requirements of workpieces of different sizes. For example, when straightening a workpiece with a diameter of 40 mm, the bolt body 56 is screwed into the limiting screw groove 54 at a certain distance from the center of the straightening roller 51, so that the distance between the two conical cylinders 52 is adjusted to about 42 mm, so as to ensure good limiting and guiding effect on the workpiece.
[0035] In some technical solutions, a circular groove 561 is provided at the bottom end of the bolt body 56, and a bolt rod 563 is installed inside the circular groove 561. The bolt rod 563 is screwed into the limiting screw hole 55 and the limiting screw groove 54.
[0036] The diameter and depth of the circular groove 561 are designed according to the dimensions of the bolt rod 563. Generally, the diameter is 1-2 mm larger than the diameter of the bolt rod 563, and the depth is 1 / 3-1 / 2 of the length of the bolt rod 563. The bolt rod 563 is made of the same or similar material as the bolt body 56, and its thread specification matches the limiting screw hole 55 and the limiting screw groove 54. By installing the bolt rod 563 in the circular groove 561 and screwing it into the limiting screw hole 55 and the limiting screw groove 54, the connection between the bolt body 56 and the limiting sleeve 53 and the straightening roller 51 can be achieved. This structural design facilitates the adjustment of the position of the conical cylinder 52 by simply rotating the bolt body 56 without directly operating the bolt rod 563, thus improving the convenience of operation. For example, when adjusting the position of the conical cylinder 52, a wrench is used to rotate the bolt body 56, and the bolt rod 563 rotates accordingly in the limiting screw hole 55 and the limiting screw groove 54, achieving fine adjustment of the position of the conical cylinder 52.
[0037] In some technical solutions, a retaining ring 566 is installed on the upper outer end of the bolt rod 563, and an annular pressure plate 565, a spring 567 and an annular rubber sheet 562 are fitted on the circumferential surface of the bolt rod 563. An extrusion block 564 is installed at the upper edge of the annular rubber sheet 562.
[0038] The retaining ring 566 is fixed to the upper outer end of the bolt rod 563 by welding or clamping, and is used to limit the axial movement of the annular pressure plate 565, spring 567, and annular rubber sheet 562. The annular pressure plate 565 is generally made of metal, such as stainless steel or carbon steel, with an inner diameter slightly larger than the diameter of the bolt rod 563. Its outer diameter is determined according to the outer diameter of the spring 567, and is generally 5-10 mm larger than the outer diameter of the spring 567. The spring 567 is a compression spring, and its elastic coefficient is selected according to the actual required clamping force, generally between 5-15 N / mm. The annular rubber sheet 562 is made of rubber material, such as nitrile rubber or fluororubber, which has good elasticity and sealing properties, and its thickness is generally 3-5 mm. The extrusion block 564 is installed at the upper edge of the annular rubber sheet 562, and can be made of the same material as the annular pressure plate 565. Its function is to tightly press the annular rubber sheet 562 against the side wall of the limiting sleeve 53 under the elastic force of the spring 567, enhancing the sealing and fastening effect. For example, when the bolt body 56 is tightened, the spring 567 is compressed, and the resulting elastic force is transmitted to the annular rubber sheet 562 through the annular pressure plate 565, so that the annular rubber sheet 562 fits tightly against the side wall of the limiting sleeve 53. The extrusion block 564 further increases the contact pressure, effectively preventing the bolt body 56 from loosening.
[0039] In some technical solutions, the outer wall of the bolt body 56 is provided with an arc surface 568, and the surface of the arc surface 568 is provided with anti-slip texture.
[0040] The arc surface 568 is designed to facilitate the operator's grip on the bolt body 56 for turning. Its radius is generally designed according to ergonomic principles, between 10-20 mm, to provide a comfortable grip. The anti-slip texture can be straight, diagonal, or mesh-like, with a depth of 0.5-1 mm and a width of 1-2 mm. By increasing the friction between the outer wall of the bolt body 56 and the operator's hand, it makes turning the bolt body 56 easier and more stable, and facilitates quick adjustment of the position of the tapered cylinder 52. For example, using straight anti-slip texture with a depth of 0.8 mm and a width of 1.5 mm can effectively prevent the wrench from slipping when the operator uses it to turn the bolt body 56, improving operating efficiency.
[0041] In some technical solutions, guide posts 9 are installed at both ends of the inner side of the adjusting groove 7, and guide holes 10 are opened on both sides of the top of the adjusting slider 8. The adjusting slider 8 is sleeved on the outside of the guide posts 9 through the guide holes 10. An electric push rod 11 is installed at the top of the inner side of the adjusting groove 7, and the driving end of the electric push rod 11 is connected to the adjusting slider 8.
[0042] The guide post 9 typically uses a chrome-plated optical shaft. Its diameter is determined based on the size and load-bearing capacity requirements of the adjusting slider 8, generally between 10-20 mm. Its length is slightly greater than the length of the adjusting groove 7 to ensure good guidance for the adjusting slider 8 throughout its stroke. The guide hole 10 and the guide post 9 are fitted with a clearance, typically controlled between 0.02-0.05 mm. This ensures the adjusting slider 8 slides freely on the guide post 9 while effectively limiting its horizontal sway, thus improving its motion accuracy. The thrust of the electric push rod 11 is determined based on the weight of the upper straightening roller assembly 5 and the frictional forces to be overcome during adjustment, generally between 1000-3000 N. The stroke is determined based on the length of the adjusting groove 7 and the maximum adjustment distance required for the upper straightening roller assembly 5. For example, if the length of the adjusting groove 7 is 150 mm and the maximum adjustment distance required for the upper straightening roller assembly 5 is 100 mm, then the stroke of the electric push rod 11 can be selected as 120-150 mm. The electric actuator 11 is connected to the adjusting slider 8 by bolts or pins. The connection should have sufficient strength to withstand the thrust of the electric actuator 11. For example, high-strength bolts of M12-M16 can be used for connection. The tightening torque of the bolts can be determined according to relevant standards, generally between 80-120 N·m.
[0043] In some technical solutions, a drive motor 4 is installed at the lower end of the outer wall of the straightening frame 2, and the straightening roller 51 in the lower straightening roller assembly 5 is connected to the drive end of the drive motor 4.
[0044] The drive motor 4 serves as the power source for the straightening roller 51, and its power selection needs to be determined based on the size of the straightening roller 51, the material of the workpiece, and the straightening speed requirements. For small straightening machines, the power of the drive motor 4 is typically between 0.75-2.2kW; for straightening machines handling large or high-strength workpieces, the power can be increased to 3-5kW. The motor speed is generally 1450r / min (asynchronous motor), and it is connected to the lower straightening roller 51 via a coupling or belt drive. If a coupling is used, the coaxiality error between the motor output shaft and the axis of the straightening roller 51 must not exceed 0.1mm / m to reduce vibration and noise during operation. If a belt drive is used, the pulley diameter ratio can be adjusted according to the required straightening roller speed. For example, when the motor pulley diameter is 100mm and the straightening roller pulley diameter is 200mm, the straightening roller speed can be reduced to 725r / min, which is suitable for scenarios with high straightening accuracy requirements.
[0045] Overall equipment layout parameters: The distance between the straightening frame 2 and the pressure plate frame 3 on the base 1 needs to be designed according to the workpiece straightening process, usually 500-1000mm, to ensure that the workpiece can smoothly enter the working area of the pressure plate 6 after being output from the straightening roller assembly 5. Anchor bolt holes with a diameter of 16-24mm and a spacing of 500-800mm can be set at the bottom of the base 1 for fixing the equipment and preventing displacement during operation.
[0046] Safety protection structure: All rotating parts (such as straightening roller 51, motor pulley) must be equipped with protective covers. The protective covers are made of steel plate or high-strength plastic, with a thickness of 2-3mm. The safe distance between the protective cover and the rotating parts shall not be less than 50mm. An emergency stop button can be installed in the operating area. The button is red and installed at a height of 1.2-1.5m. Pressing it will immediately cut off the main power supply to the equipment.
[0047] Lubrication system: Lubrication points need to be set for moving parts such as bearings, adjusting sliders 8 and guide columns 9 of the straightening roller assembly 5. Lithium-based grease (NLGI2 grade) is applied using grease nipples. The lubrication cycle is once every 8 working hours. The amount of grease added each time should be such that it overflows from the gaps to reduce wear on the parts.
[0048] Control system integration: A PLC control system can be added to integrate the control of the electric push rod 11, drive motor 4, and pressure plate 6 drive device (such as hydraulic cylinder). Straightening parameters (such as straightening roller spacing, pressure plate pressure, and motor speed) can be set through the touch screen. The parameter adjustment accuracy can reach ±0.1mm (spacing) and ±0.05MPa (pressure). It also has a parameter memory function and can store straightening programs for 10-20 commonly used workpieces, improving changeover efficiency.
[0049] I. Preparation stage before direct establishment
[0050] Before starting the equipment to straighten the workpiece, a series of preparatory work needs to be completed according to the size, material, and degree of deformation of the workpiece to be straightened. First, the operator inputs the workpiece parameters, including the workpiece diameter, length, and straightening accuracy requirements, through the touch screen of the PLC control system. The system automatically adjusts the key components of the equipment according to the parameters or prompts the operator: for the height adjustment of the upper straightening roller assembly 5, the control system drives the electric push rod 11 in the adjustment groove 7 to move. The driving end of the electric push rod 11 pushes the adjusting slider 8 to move along the guide post 9 in the adjustment groove 7 until the distance between the upper and lower straightening roller assemblies 5 reaches the set value (adjustment accuracy ±0.1mm). The precise fit between the guide post 9 and the guide hole 10 ensures no deviation during the adjustment process.
[0051] To adjust the position of the conical cylinder 52, the operator uses a wrench to tighten the bolt body 56 (utilizing the anti-slip texture of its outer arc surface 568 to increase friction). The bolt rod 563 rotates within the limiting screw hole 55 and the limiting screw groove 54, causing the conical cylinder 52 to slide on the straightening roller 51. By selecting different positions of the limiting screw groove 54, the distance between the two relatively positioned conical cylinders 52 can be adjusted to suit the workpiece diameter (e.g., a workpiece with a diameter of 20-30mm corresponds to a conical cylinder distance of 22-32mm). After adjustment, the spring 567 inside the bolt body 56 applies pressure to the annular rubber sheet 562 through the annular pressure plate 565. The compression block 564 enhances the sealing effect, while the fixing ring 566 restricts the axial displacement of the components, ensuring that the conical cylinder 52 remains stable and does not loosen.
[0052] II. Workpiece Straightening Processing Stage
[0053] After preparation, the deformed workpiece is placed on the lower straightening roller assembly 5 within the straightening frame 2. Both ends of the workpiece rest on the conical surfaces of the two conical cylinders 52. The tapered design of the conical cylinders 52 (typically 1:5-1:10) provides centering guidance for the workpiece, preventing it from deviating during transport. The drive motor 4 is started. The motor drives the lower straightening roller 51 through a coupling or belt drive (the pulley diameter ratio can adjust the straightening roller speed, such as 725 r / min for high-precision straightening). The IP56 protection rating of the drive motor 4 ensures stable operation in dusty workshop environments, and the fan cooling system maintains the motor's operating temperature within permissible limits.
[0054] When the lower straightening roller 51 rotates, it drives the workpiece forward through friction. Simultaneously, the upper straightening roller assembly 5 applies downward pressure to the workpiece under the influence of gravity and the preload of the electric push rod 11. When the deformed workpiece passes between the upper and lower straightening roller assemblies 5, the straightening roller 51 generates a continuous bending correction force on the workpiece: for bent sections, the straightening roller, through the reaction force generated by elastic deformation, gradually restores the workpiece to straightness. The distance between the upper and lower straightening rollers is set slightly smaller than the theoretical diameter of the workpiece, creating a certain correction allowance. The rigid connection between the limiting sleeve 53 of the conical cylinder 52 and the bolt body 56 ensures that the conical cylinder does not shift under load, preventing secondary deformation of the workpiece during the straightening process.
[0055] III. Flattening and Finishing Stage
[0056] The workpiece, initially straightened by the straightening roller assembly 5, is conveyed into the pressure plate frame 3 and enters the working area of the pressure plate 6. At this time, the PLC control system starts the drive device (such as a hydraulic cylinder) of the pressure plate 6 according to the preset program. The hydraulic cylinder drives the pressure plate 6 to move downward, applying vertical pressure to the workpiece (pressure adjustment accuracy ±0.05MPa). The bottom surface of the pressure plate 6 is covered with a rubber pad to increase the contact area with the workpiece and avoid damage to the workpiece surface during the flattening process.
[0057] The flattening pressure is determined based on the workpiece material. For example, for low-carbon steel workpieces, the pressure can be set at 5-8 MPa; for high-strength alloy steel workpieces, the pressure can be increased to 8-12 MPa. After the pressure is applied for a certain period of time (usually 1-3 seconds), the hydraulic cylinder drives the pressure plate 6 to reset, completing the flattening and finishing process. During this process, the rigid structure of the pressure plate frame 3 ensures stable pressure transmission and avoids affecting the flattening accuracy due to frame deformation.
[0058] IV. Equipment Operation and Maintenance Principles
[0059] Throughout the entire operation, multiple structural designs of the equipment work together to ensure straightening accuracy and stability. The lubrication system applies NLGI2 grade lithium-based grease to the moving parts such as the bearings, adjusting sliders 8, and guide columns 9 of the lower straightening roller assembly 5 through grease nipples. Grease is applied every 8 hours of operation. The grease overflows from the gaps to form an oil film, reducing the coefficient of friction to below 0.02, reducing component wear and lowering energy consumption.
[0060] In terms of safety protection, the protective cover (2-3mm thick) of the rotating parts maintains a safe distance of more than 50mm from the rotating parts to prevent operators from contacting dangerous parts; the emergency stop button can immediately cut off the main power supply in an emergency, and the overload protection device of drive motor 4 automatically cuts off the power when the load exceeds 1.2 times the rated value to avoid equipment damage. The parameter memory function of the PLC control system can store 10-20 commonly used workpiece programs, eliminating the need for repeated adjustments during model changeovers and greatly improving work efficiency.
[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0062] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A workpiece straightening press, comprising a press base (1), characterized in that, A straightening frame (2) is mounted on the front side of the upper end of the press machine base (1), and a press plate frame (3) is mounted on the rear side of the upper end of the press machine base (1). The straightening frame (2) is equipped with straightening roller assemblies (5) at both the upper and lower ends, and adjustment grooves (7) are opened on the upper ends of the inner walls on both the left and right sides of the straightening frame (2). Each of the adjustment slots (7) is equipped with an adjustment slider (8), and the upper straightening roller assembly (5) is assembled between two adjustment sliders (8); The straightening roller assembly (5) includes a straightening roller (51), and two conical cylinders (52) are fitted around the outside of the straightening roller (51), and the two conical cylinders (52) are arranged opposite to each other; The pressure plate frame (3) is equipped with a pressure plate disc (6) inside.
2. A workpiece straightening press machine according to claim 1, characterized in that, The rear sidewalls of the two conical cylinders (52) are equipped with limit sleeves (53), and the outer sidewalls of the straightening roller (51) are provided with a set of limit screw grooves (54). The sidewalls of the limit sleeves (53) are provided with limit screw holes (55), and the inside of the limit screw holes (55) and the limit screw grooves (54) are screwed with bolt bodies (56).
3. A workpiece straightening press machine according to claim 2, characterized in that, The bottom end of the bolt body (56) is provided with a circular groove (561), and a bolt rod (563) is installed inside the circular groove (561). The bolt rod (563) is screwed into the limiting screw hole (55) and the limiting screw groove (54).
4. A workpiece straightening press machine according to claim 3, characterized in that, A retaining ring (566) is installed on the upper outer end of the bolt rod (563). An annular pressure plate (565), a spring (567) and an annular rubber sheet (562) are fitted on the circumferential surface of the bolt rod (563). An extrusion block (564) is installed at the upper edge of the annular rubber sheet (562).
5. A workpiece straightening press machine according to claim 2, characterized in that, The outer wall of the bolt body (56) is provided with an arc surface (568), and the surface of the arc surface (568) is provided with anti-slip texture.
6. A workpiece straightening press machine according to claim 1, characterized in that, Guide posts (9) are installed at both ends of the inner side of the adjustment groove (7). Guide holes (10) are opened on both sides of the top of the adjustment slider (8). The adjustment slider (8) is sleeved on the outside of the guide post (9) through the guide hole (10). An electric push rod (11) is installed at the top of the inner side of the adjustment groove (7). The driving end of the electric push rod (11) is connected to the adjustment slider (8).
7. A workpiece straightening press machine according to claim 1, characterized in that, The lower end of the outer wall of the straightening frame (2) is equipped with a drive motor (4), and the straightening roller (51) in the lower straightening roller assembly (5) is connected to the drive end of the drive motor (4).