Dynamic compensation device and compensation method for clearance of heavy-load transmission structure

Abstract

The invention discloses a dynamic clearance compensation device and method for a heavy-load transmission structure, and the device comprises a stamping device, the stamping device is provided with a stamping die for stamping forming, and the stamping die comprises a male die unit and a female die unit. The stamping die is provided with a detection device used for monitoring the forming degree and an adjusting device used for adjusting a forming cavity, and the detection device comprises a telescopic top contact piece and a recognition device. According to the gap dynamic compensation device and method for the heavy-load transmission structure, the forming state of a product can be recognized through the detection device and the recognition device, then the male die unit is dynamically adjusted to continue or stop forming operation, the situation that product forming is unqualified due to transmission errors of a stamping device is avoided, and the product quality is improved. And meanwhile, equipment with errors can be continuously used, and the utilization rate of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of heavy-duty transmission technology, and in particular to a dynamic compensation device and method for clearance in heavy-duty transmission structures. Background Technology

[0002] Punch presses are key equipment widely used in metal forming and processing. They are mainly used for cold stamping processes such as punching, blanking, bending, and stretching of sheet metal, strip, or profiles.

[0003] However, in actual operation, large-tonnage punch presses inevitably introduce small but not negligible positional deviations during the downward punching stroke of the slide due to manufacturing tolerances and assembly clearances in the transmission system, coupled with wear and tear over long-term use. Although these deviations may only be on the order of tens to hundreds of micrometers in a single punching stroke, in high-precision stamping applications (such as the manufacture of precision electronic components, automotive structural parts, or micro connectors), they are sufficient to cause serious problems such as incomplete punching, excessive burrs, part deformation, or even die jamming.

[0004] More importantly, the fluctuations in the stamping endpoint position caused by transmission backlash are non-repeatable and time-varying—meaning that the actual downward endpoint of each stamping is not exactly the same and cannot be eliminated by simple preset stroke compensation. Relying solely on static settings or periodic calibration is insufficient to address the accumulation of dynamic errors caused by factors such as temperature changes, lubrication conditions, and load fluctuations during production. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a dynamic compensation device and method for clearance in heavy-duty transmission structures. This application determines the transmission clearance by monitoring the clearance between the molded product and the mold cavity, and adjusts and compensates for this clearance by adjusting the height of the cam module.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a dynamic compensation device and method for clearance in heavy-duty transmission structures, comprising a stamping device, wherein the stamping device is equipped with a stamping die for stamping, the stamping die comprising a punch unit and a die unit, the stamping die being equipped with a detection device for monitoring the degree of forming and an adjustment device for adjusting the forming cavity, the detection device comprising a telescopic top contact and an identification device, the telescopic top contact being disposed on the stamping die for contacting the forming plate surface during forming, the identification device being used to identify the retraction amount of the telescopic top contact, and the control unit controlling the punch unit to continue or stop the forming operation based on the retraction amount of the top contact.

[0007] Its beneficial effects are that the forming state of the product can be identified through the detection and identification devices, and then the punch unit can be dynamically adjusted to continue or stop the forming operation, thereby avoiding the situation where the product is unqualified due to the transmission error of the stamping device, improving the qualification rate of the formed product, and at the same time, the equipment with errors can continue to be used, improving the utilization rate of the equipment.

[0008] In the above scheme, preferably, the telescopic top contact is disposed at the bottom of the mold cavity of the die unit, and multiple telescopic top contacts are disposed thereon. The telescopic top contact includes a piston tube and a piston rod that is slidably disposed in the piston tube. The upper end of the piston rod extends out of the mold cavity surface to contact the molded sheet.

[0009] In the above scheme, preferably, the piston tube is filled with hydraulic oil, the identification device includes a collection pipe and an identification element, the rear ends of all piston tubes are connected to the collection pipe through pipes, and the identification element determines the stroke error of the punch unit by identifying the volume of hydraulic oil in the collection pipe.

[0010] In the above scheme, preferably, the punch unit includes a first housing and a punch module that is guided and slidably disposed on the first housing. The first housing also has a first wedge block that is laterally slidably disposed to limit the position of the punch module, so that the punch module remains stationary relative to the die unit when the punch unit exceeds the stroke amount.

[0011] In the above scheme, preferably, the concave mold unit includes a concave module for forming in cooperation with the convex module. A first sliding block is slidably arranged on the mold cavity sidewall of the concave module to cooperate with the sidewall of the convex module to form the sidewall of the product after forming in the vertical direction.

[0012] In the above scheme, preferably, the convex module is provided with a guide post, the guide post is provided with a locking hole, and the concave module is provided with a locking block, which is used to lock the convex module by inserting it into the locking hole after the convex module and the concave module are fully engaged.

[0013] In the above scheme, preferably, the rear end of the first slider is equipped with a first hydraulic component for pushing it into the mold cavity, and the side wall groove of the convex module is also equipped with a detection device for identifying and detecting the forming state of the first slider on the product side wall.

[0014] In the above scheme, preferably, the first housing is provided with a guide rod, the concave module is provided with a second piston and is located below the guide rod, the piston chamber of the second piston is provided with hydraulic oil and is connected to the first hydraulic component through a pipe, and the guide rod presses against the second piston to press the hydraulic oil inside into the first hydraulic component so that the first slider extends.

[0015] In the above scheme, preferably, a return spring is also provided in the piston chamber of the second piston member, so that the hydraulic oil in the first hydraulic member flows back to the second piston member after the guide rod is disengaged from the pressure contact.

[0016] Dynamic compensation method for backlash in heavy-duty transmission structures: S1: Place the sheet metal on the stamping die, and the stamping device performs the stamping operation.

[0017] S2: The telescopic top contact abuts against the formed plate, and the telescopic top contact synchronously shows different retraction amounts according to the degree of forming.

[0018] S3: The control unit controls the punch unit to continue or stop the molding operation based on the retraction amount of the top contact.

[0019] The beneficial effects of the present invention are as follows: The present invention provides a dynamic compensation device and method for clearance in heavy-duty transmission structures. It can identify the forming state of the product through a detection device and an identification device, and then dynamically adjust the punch unit to continue or stop the forming operation, thereby avoiding the situation where the product forming is unqualified due to the transmission error of the stamping device, improving the qualification rate of the formed product, and at the same time allowing the equipment with errors to continue to be used, thereby improving the utilization rate of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention.

[0021] Figure 2 This is a front view of the present invention.

[0022] Figure 3 This is a schematic diagram of the stamping die of the present invention.

[0023] Figure 4 This is a cross-sectional view of the stamping die of the present invention.

[0024] Figure 5 This is a cross-sectional view of the bottom of the present invention after it has been molded.

[0025] Figure 6 This is a cross-sectional view of the punch unit of the present invention.

[0026] Figure 7 This is a cross-sectional view of the guide rod and the second piston component of the present invention.

[0027] Figure 8 This is a partial enlarged view of the detection device of the present invention.

[0028] Figure 9 This is a cross-sectional view of the sidewall forming state in Embodiment 2 of the present invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1:

[0030] See Figures 1-9 A dynamic compensation device for clearance in a heavy-duty transmission structure includes a stamping device 1, a stamping die 2, a detection device 3, and a control unit. The stamping device 1 includes a base plate 11 and a sliding stroke plate 12. The sliding stroke plate 12 can slide up and down to complete stamping or forming operations. The stamping die 2 includes a punch unit 21 and a die unit 22. The punch unit 21 is fixedly arranged on the sliding stroke plate 12 and is driven to move by the sliding stroke plate 12. The die unit 22 is fixedly arranged on the base plate 11 and, when the punch unit 21 moves downward, it closes with the die unit 22 to complete stamping or forming operations.

[0031] The punch unit 21 includes a first housing 211, a punch module 212, and a first inclined block 213. The first housing 211 is fixedly mounted on the sliding stroke plate 12 by bolts. The punch module 212 is equipped with a guide block 2123, and a sliding cavity 2112 is formed inside the first housing 211. The punch module 212 is slidably positioned within the sliding cavity 2112 of the first housing 211 by a guide, and the punch portion on the punch module 212 extends downward from the lower end of the first housing 211. A second cavity is formed on the side wall of the sliding cavity 2112 of the first housing 211. The first inclined block 213, which is guided and slidably controlled by hydraulic components, is located within the second cavity. The first inclined block 213 is provided with a first inclined surface 2131, and the guide block 2123 is provided with a second inclined surface. In the initial state, the first inclined surface 2131 on the first inclined block 213 abuts against the second inclined surface on the convex module 212, and the lower end face of the guide block 2123 presses against the bottom surface of the sliding cavity 2112, thereby locking the convex module 212 onto the first housing 211. At the same time, a first spring member 2113 is provided in the sliding cavity 2112. The two ends of the first spring member 2113 abut against the upper end face of the guide block 2123 and the upper end face of the sliding cavity 2112, respectively, giving the guide block 2123 a downward pressing force.

[0032] By controlling the position of the first inclined block 213, the locking force at the upper end of the convex module 212 is eliminated, thereby allowing the convex module 212 to move upward relative to the guide block 2123. After the first inclined block 213 completely leaves the travel range of the guide block 2123, when the convex module 212 is subjected to force at its lower end, it can slide upward relative to the sliding cavity 2112.

[0033] The convex module 212 is provided with multiple guide posts. In this embodiment, a guide post 2121 is provided at each of the four corners, and a locking hole 2122 for locking is provided on the guide post 2121. The concave mold unit 22 includes a concave module 221 for cooperating with the convex module 212 to perform molding operations. The concave module 221 is fixedly disposed on the base plate 11. The concave module 221 is provided with a guide hole 2211 adapted to the guide post 2121. The guide post 2121 of the convex module 212 is guided and slidably disposed in the guide hole 2211. A second sliding cavity is provided on the side wall of the guide hole 2211. A locking block 223 is elastically guided and slidably disposed in the second sliding cavity. The lower end of the locking block 223 is an arc surface and the upper end is a plane.

[0034] When the stamping die 2 is installed on the stamping device 1, and the sliding stroke plate 12 moves upward to its highest position, the convex module 212 and the concave module 221 separate. The guide post 2121 of the convex module 212 is still slidably connected to the guide hole 2211, and the front end of the locking block 223 touches the side wall of the guide post 2121. When the sliding stroke plate 12 moves downward, i.e., when the mold is closed, the guide post 2121 moves downward. When the mold is fully closed, i.e. when the forming is completed, the locking hole 2122 and the locking block 223 are aligned. Under the action of elastic force, the locking block 223 is inserted forward into the locking hole 2122. The upper end of the locking block 223 limits the guide post 2121, so that the convex module 212 can no longer move downward. At the same time, this is also the correct mold closing position of the convex module 212 and the concave module 221.

[0035] Due to the presence of transmission gaps, the sliding stroke plates 12 all have slight deviations, so they need to be inspected during the molding process.

[0036] The detection device 3 includes a telescopic top contact 31 and an identification device 32. The telescopic top contact 31 includes a piston tube 311 and a piston rod 312 that is slidably disposed in the piston tube 311. The upper end of the piston rod 312 is designed with a round head. A second elastic element is disposed in the piston tube 311 to allow the piston rod 312 to extend outward and reset. Hydraulic oil is disposed in the piston tube 311.

[0037] The telescopic top contact 31 is disposed in the concave surface of the bottom surface of the mold cavity on the concave module 221. When the sheet metal is formed, the concave surface of the bottom surface of the mold cavity is often the last position to contact the sheet metal surface. Therefore, placing the telescopic top contact 31 in this position can clearly reflect the connection between the convex module 212 and the concave module 221. There are multiple telescopic top contacts 31, and the rear end of each piston tube 311 is connected to the collection pipe 321 on the identification device 32 through a pipe. The collection pipe 321 is also a piston tube with a piston ring 3211 on it. During the forming process, the hydraulic oil in the telescopic top contact 31 converges into the collection pipe 321, thereby pushing the piston ring 3211 to move. By identifying the movement distance of the piston ring 3211, the connection between the convex module 212 and the concave module 221 can be determined.

[0038] The identification element 322 can be a displacement sensor, which identifies the movement displacement of the piston ring 3211, or it can be a sliding rheostat, with the sliding head of the rheostat connected to the piston ring 3211. When the piston ring 3211 moves, the resistance change on the sliding rheostat is detected, and then control is performed.

[0039] The control unit initially sets the downward distance of the sliding stroke plate 12 to the normal mold closing downward value plus an excess value. The excess value is greater than the clearance deviation value of the equipment. The excess value can be set according to the situation of the stamping device, preferably 0.1-0.5mm. Therefore, each downward movement of the sliding stroke plate 12 can make the convex module 211 and the concave module 221 completely close the mold. The complete mold closing state of the two is determined by the moving distance of the piston ring 3211.

[0040] Its working principle or usage method is as follows: During stamping, the robot or operator positions the sheet metal on the die unit 22. At this time, the punch unit 211 is locked by the first inclined block 213, and all the telescopic top contacts 31 are in the extended state. The sliding stroke plate 12 moves downward, driving the punch unit 21 to move downward.

[0041] During the pressing process, the sheet metal is formed into a product by the cooperation of the convex module 211 and the concave module 221. Then, the telescopic top contact 31 contacts the sheet metal surface and is pressed and retracted into the mold cavity surface. At this time, the piston ring 3211 in the collection tube 321 moves.

[0042] When the piston ring 3211 moves to the set value, that is, when the mold is fully closed, the control unit controls the first inclined block 213 to retract, that is, the upper limit lock of the convex module 212 is canceled. Then, as the sliding stroke plate 12 continues to move downward, the convex module 212 remains stationary relative to the concave module 221 and slides relative to the first housing 211.

[0043] When the sliding travel plate 12 moves upward to reset, the first inclined block 213 extends again to lock the convex module 212. At the same time, after the product is removed, the telescopic top contact 31 automatically resets.

[0044] This overcomes the deviation of the sliding stroke plate 12 during downward movement, ensuring that qualified products are obtained each time the molding process is completed.

[0045] Example 2:

[0046] See Figures 1-8 This embodiment makes the following further improvements based on embodiment 1: A second sliding cavity 2212 is provided on the side wall of the cavity of the concave module 221. A first sliding block 222 is slidably arranged in the second sliding cavity 2212. The first sliding block 222 is used to cooperate with the groove on the side wall of the convex module 212 to form the side wall of the molded product. The rear end of the first sliding block 222 is connected to a first hydraulic component 2221 used to push it forward and backward into and out of the side wall of the cavity. A guide rod 2111 is arranged on the first housing 211. Module 221 has a guide hole adapted to the guide rod 2111, and a second piston 224 is provided at the bottom of the guide hole. The piston chamber of the second piston 224 is filled with hydraulic oil and is connected to the rear end of the first hydraulic component 2221 through a pipe. A return spring 2241 is also provided in the piston chamber of the second piston 224. When the second piston 224 is not pressed, the hydraulic oil in the first hydraulic component 2221 flows back into the second piston 224, thereby causing the first sliding block 222 to automatically retract into the second sliding chamber 2212. The convex module 212 is also equipped with a detection device 3, which is used to identify and detect the forming state of the first sliding block 222 on the side wall of the product. Multiple telescopic top contacts 31 are arranged in the side wall groove of the convex module 212, and all the telescopic top contacts 31 on the side wall are also connected to the collection pipe 321 on the second identification device 32 through the pipe. After the piston ring 3211 of the control unit moves to the set value, it controls the sliding stroke plate 12 to stop descending.

[0047] One method of quick demolding is to independently separate an assembly block below the middle position of the groove on the side wall of the convex module 212. During demolding, the assembly block is magnetically or quickly connected to the convex module 212. After all molding is completed, when demolding, the first housing 211 moves upward first, and the first sliding block 222 retracts. After the convex module 212 and the first housing 211 are reset, the convex module 212 moves the molded product upward together and leaves the mold cavity. The operator removes the molded product from the convex module 212, and the assembly block is removed together. The operator then quickly or magnetically attaches the assembly block to the convex module 212.

[0048] The first sliding block 222 can also be a punch block, and the side wall groove of the convex module 212 can be a punch or groove that cooperates with it. Thus, when the first sliding block 222 extends, punching or grooving operations are performed on the side wall of the product. When it is a punch block, the detection device 3 does not need to be configured on the convex module 212.

[0049] Its working principle or usage method is as follows: During stamping, the robot or operator positions the sheet metal on the die unit 22. At this time, the punch unit 211 is locked by the first inclined block 213, and all the telescopic top contacts 31 are in the extended state. The sliding stroke plate 12 moves downward, driving the punch unit 21 to move downward.

[0050] During the pressing process, the sheet metal is formed into a product by the cooperation of the convex module 211 and the concave module 221. Then, the telescopic top contact 31 contacts the sheet metal surface and is pressed and retracted into the mold cavity surface. At this time, the piston ring 3211 in the collection tube 321 moves.

[0051] When the piston ring 3211 of the detection device 3 in the mold cavity moves to the set value, that is, when the mold is fully closed, the control unit controls the first inclined block 213 to retract, so that the first inclined block 213 is completely retracted into the second cavity, completely canceling the upper limit of the convex module 212. At this time, the sliding stroke plate 12 continues to move downward, and the convex module 212 remains stationary relative to the concave module 221. At this time, the locking block 223 is inserted into the locking hole 2122, thereby preventing the convex module 212 from moving downward. The first spring member 2113 presses against the upper end of the convex module 212, so the groove on the side wall of the convex module 212 is aligned with the first sliding block 222.

[0052] As the sliding travel plate 12 continues to descend, the guide rod 2111 on the first housing 211 presses against the second piston 224, thereby pressing the hydraulic fluid in the second piston 224 into the first hydraulic component 2221, causing the first sliding block 222 to extend out and cooperate with the groove on the side wall of the convex module 212 to perform the forming operation on the side wall of the product.

[0053] After the detection device 3 detects that the forming is in place, that is, when the piston ring 3211 moves to the set value, the control unit controls the sliding stroke plate 12 to continue to move downward.

[0054] At this point, the forming process for the bottom and side walls of the product is completed.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dynamic compensation device for backlash in heavy-duty transmission structures, characterized in that: It includes a stamping device (1), on which a stamping die (2) for stamping is disposed, the stamping die (2) including a punch unit (21) and a die unit (22). The stamping die (2) is equipped with a detection device (3) for monitoring the degree of forming and an adjustment device (4) for adjusting the forming cavity. The detection device (3) includes a telescopic top contact (31) and an identification device (32). The telescopic top contact (31) is disposed on the stamping die (2) and is used to contact the forming plate surface during forming. The identification device (32) is used to identify the retraction amount of the telescopic top contact (31). The control unit controls the punch unit (21) to continue or stop the molding operation based on the retraction amount of the top contact (31).

2. The dynamic compensation device for backlash in heavy-duty transmission structures according to claim 1, characterized in that: The telescopic top contact (31) is disposed at the bottom of the mold cavity of the die unit (22), and there are multiple of them. The telescopic top contact (31) includes a piston tube (311) and a piston rod (312) that is slidably disposed in the piston tube (311). The upper end of the piston rod (312) extends out of the mold cavity surface to contact the molded sheet.

3. The dynamic compensation device for backlash in a heavy-duty transmission structure according to claim 2, characterized in that: The piston tube (311) is filled with hydraulic oil. The identification device (32) includes a collection pipe (321) and an identification element (322). The rear ends of all piston tubes (311) are connected to the collection pipe (321) through pipes. The identification element (322) determines the stroke error of the punch unit (21) by identifying the capacity of the hydraulic oil in the collection pipe (321).

4. The dynamic compensation device for backlash in heavy-duty transmission structures according to any one of claims 1-3, characterized in that: The punch unit (21) includes a first housing (211) and a punch module (212) that is guided and slidably disposed on the first housing (211). A first wedge block (213) is also laterally slidably disposed in the first housing (211) to limit the position of the punch module (212) so that the punch module (212) remains stationary relative to the die unit (22) when the punch unit (21) exceeds the stroke amount.

5. The dynamic compensation device for backlash in a heavy-duty transmission structure according to claim 4, characterized in that: The concave mold unit (22) includes a concave module (221) for forming in conjunction with the convex module (212). A first sliding block (222) is slidably arranged on the mold cavity sidewall of the concave module (221) to form the sidewall of the product in conjunction with the sidewall of the convex module (212) after forming in the vertical direction.

6. The dynamic compensation device for backlash in a heavy-duty transmission structure according to claim 5, characterized in that: The convex module (212) is provided with a guide post (2121), and the guide post (2121) is provided with a locking hole (2122). The concave module (221) is provided with a locking block (223), which is used to lock the convex module (212) after the convex module (212) and the concave module (221) are fully engaged.

7. The dynamic compensation device for backlash in a heavy-duty transmission structure according to claim 6, characterized in that: The rear end of the first slider (222) is equipped with a first hydraulic component (2221) for pushing it into the mold cavity. The side wall groove of the convex module (212) is also equipped with a detection device (3) for identifying and detecting the forming state of the first slider (222) on the side wall of the product.

8. The dynamic compensation device for backlash in a heavy-duty transmission structure according to claim 7, characterized in that: The first housing (211) is provided with a guide rod (2111), and the recessed module (221) is provided with a second piston (224) located below the guide rod (2111). The piston chamber of the second piston (224) is provided with hydraulic oil and is connected to the first hydraulic component (2221) through a pipe. The guide rod (2111) presses against the second piston (224) to press the hydraulic oil inside into the first hydraulic component (2221) so that the first slider extends.

9. The dynamic compensation device for backlash in a heavy-duty transmission structure according to claim 8, characterized in that: The piston chamber of the second piston (224) is also equipped with a return spring (2241) so that after the guide rod (2111) is disengaged from the pressure contact, the hydraulic oil in the first hydraulic component (2221) flows back to the second piston (224).

10. A compensation method using the dynamic compensation device for backlash in a heavy-duty transmission structure as described in claim 1, characterized in that: S1: Place the sheet metal on the stamping die (2), and the stamping device (1) performs the stamping operation; S2: The telescopic top contact (31) abuts against the formed plate, and the telescopic top contact (31) synchronously shows different retraction amounts according to the degree of forming; S3: The control unit controls the punch unit (21) to continue or stop the molding operation according to the retraction amount of the top contact (31).

Images