Stamping equipment with function of adjusting stroke and speed

Abstract

The application provides a stamping equipment with a stroke and speed adjusting function, and relates to the technical field of stamping. The equipment comprises a main frame, a stamping driving part, an upper die part, a lower die part and a pressing part. The upper die part comprises a sliding block and an upper die. The stamping driving part comprises a center wheel, a motor, a first connecting rod and a second connecting rod. The center wheel is provided with a plurality of stroke hole groups. Each stroke hole group comprises two stroke holes. The center distances of the two stroke holes in different stroke hole groups are different. The lower die part comprises a lower die. The upper side and the lower side of the lower die are respectively provided with a blank holder and a push-up plate. The blank holder and the push-up plate are connected through a supporting pin. The pressing part comprises a bottom plate, a sliding plate and a driving oil cylinder for driving the sliding plate. A top rod is slidably arranged on a guide support. The roller at the lower end of the top rod is matched with a speed adjusting groove on the sliding plate. The equipment can not only adjust the stamping stroke, but also shorten the stamping beat on the basis of reducing the impact of the blank holder collision.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, specifically to a stamping device with adjustable stroke and speed functions. Background Technology

[0002] As a core piece of equipment in metal forming and processing, the motion characteristics of mechanical presses directly affect the forming quality and production efficiency of workpieces. Traditional mechanical presses typically use a crank-slider mechanism as the main transmission method, and the stamping stroke of the crank-slider mechanism is generally fixed. However, this fixed stamping stroke cannot adapt to the processing requirements of workpieces with different thicknesses. Especially in the field of precision stamping, a fixed stamping stroke not only reduces the quality of stamped products and creates quality defects, but also significantly increases the maintenance costs and damage risks of equipment and molds.

[0003] In addition, the blank holder used to press sheet metal in existing mechanical presses usually moves up and down at a constant speed. When the blank holder moves at a high speed, although the stamping cycle can be shortened and the work efficiency improved, the impact force during the pressing process is large, increasing the risk of equipment damage and noise pollution. When the blank holder moves at a low speed, although the degree of impact and noise problems can be effectively reduced, the production efficiency will be reduced. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a stamping equipment with adjustable stroke and speed functions. This equipment can not only adjust the stamping stroke according to the thickness of the sheet metal, but also effectively shorten the stamping cycle and improve production efficiency while solving the problems of pressure ring collision and noise.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A stamping device with adjustable stroke and speed functions includes a main frame. From top to bottom, a stamping drive assembly, an upper die assembly, and a lower die assembly are arranged in the main frame. The upper die assembly includes a slider that is slidably connected to the main frame. An upper mold is arranged on the slider.

[0007] The stamping drive assembly includes a center wheel and a motor for driving the center wheel to rotate. One end of the first connecting rod is hinged to the adjustment hole on the center wheel, the other end of the first connecting rod is hinged to the upper end of the second connecting rod, and the lower end of the second connecting rod is connected to the slider.

[0008] The central wheel is provided with several sets of adjustment holes. Each set of adjustment holes includes two adjustment holes symmetrically arranged about the center of the central wheel. The center distance between the two adjustment holes in different sets of adjustment holes is different, and the line connecting the centers of the two adjustment holes in several sets of adjustment holes bisects the central wheel.

[0009] The lower mold assembly includes a lower mold mounted on the main frame. The upper and lower sides of the lower mold are respectively provided with a pressure ring and a push plate. The push plate is provided with a support pin. The upper end of the support pin passes through the lower mold and is connected to the pressure ring. The lower mold is provided with a third guide hole that cooperates with the support pin.

[0010] A clamping component is provided below the lower mold assembly;

[0011] The clamping assembly includes a base plate, a sliding plate slidably mounted on the base plate, a drive cylinder between the base plate and the sliding plate, a guide support on the base plate, a push rod slidably mounted on the guide support, a roller at the lower end of the push rod, and a speed regulating groove on the sliding plate that cooperates with the roller. The speed regulating groove is divided into a first slow stroke section, a fast stroke section, and a second slow stroke section from bottom to top.

[0012] When the slide plate reciprocates relative to the base plate under the drive of the hydraulic cylinder, the push rod can drive the pressure ring to move up and down under the drive of the slide plate. When the roller is engaged with the first slow stroke section and the second slow stroke section, the lifting speed of the push rod is less than the lifting speed of the push rod when the roller is engaged with the fast stroke section.

[0013] Furthermore, the main frame includes a base, a workbench, uprights, a guide plate, and a crossbeam. The base includes two support plates. The workbench is located above the support plates, and both ends of the workbench are fixedly connected to the support plates. Two uprights are arranged above the workbench, and a crossbeam is arranged directly above the two uprights. The guide plate is located between the crossbeam and the workbench, and both ends of the guide plate are fixedly connected to the uprights.

[0014] Furthermore, the slider is provided with a guide rod, and the guide plate is provided with a first guide hole that cooperates with the guide rod.

[0015] Furthermore, a first vertical plate and a second vertical plate are provided on the lower side of the crossbeam, the motor is provided on the first vertical plate, and a rotating shaft is rotatably provided on the second vertical plate. The power output shaft of the motor is connected to one end of the rotating shaft through a coupling, and the center wheel is connected to the other end of the rotating shaft.

[0016] Furthermore, a third vertical plate is provided on the side of the crossbeam opposite to the first vertical plate, and a guide block is provided between the second vertical plate and the third vertical plate. The two ends of the guide block are fixedly connected to the second vertical plate and the third vertical plate, respectively. A second guide hole is provided on the guide block to cooperate with the second connecting rod.

[0017] Furthermore, a fixing block is provided at the lower end of the second connecting rod, and a groove for accommodating the fixing block is provided on the lower side of the slider, and a pad is provided on the lower side of the fixing block.

[0018] Furthermore, a guide frame is provided on the base plate, the guide frame includes a horizontal bar and vertical bars located at both ends of the horizontal bar, a guide rod is provided on the base plate between the two vertical bars, the two ends of the guide rod are respectively connected to the base plate through brackets, a first guide groove is provided on the lower side of the horizontal bar, the upper end of the slide plate forms a guide engagement with the first guide groove, and the lower end of the slide plate is provided with a second guide groove that engages with the guide rod.

[0019] Furthermore, the base plate is provided with two parallel sliding plates, the driving cylinder is located between the two sliding plates, the base plate is provided with two guide supports that correspond one-to-one with the sliding plates, and the guide supports are located on the outside of the corresponding sliding plates, the two push rods are respectively connected to the connecting plate, and the connecting plate is connected to the push plate.

[0020] Furthermore, a plurality of oil storage ring grooves are provided on the inner sidewall of the third guide hole, the support pin and the lower mold adopt a transition fit, and the oil storage ring grooves are filled with lubricating grease.

[0021] The beneficial effects of this invention are:

[0022] 1. The stamping equipment with stroke and speed adjustment functions provided in this application embodiment is provided by setting multiple stroke adjustment hole groups on the center wheel, and the distance from the stroke adjustment hole in each stroke adjustment hole group to the center of the center wheel is different. When the first connecting rod is connected to the stroke adjustment hole of different stroke adjustment hole groups, the stroke of the second connecting rod moving up and down will change, thereby realizing the adjustment of the slide stroke to meet the stamping requirements of plates of different thicknesses.

[0023] 2. The stamping equipment with adjustable stroke and speed functions provided in this application embodiment achieves a slow-fast-slow motion characteristic by setting up a clamping component and changing the motion characteristics of the pressure ring's up-and-down movement through the clamping component. The slow strokes at both ends ensure smooth start and stop of the pressure ring, reducing collision impact and noise pollution, while the fast stroke increases the movement speed in the middle movement stage, thereby shortening the stamping cycle and improving production efficiency. Attached Figure Description

[0024] Figure 1 This application provides an overall structural schematic diagram of a stamping device with adjustable stroke and speed functions, as shown in the embodiments of the present application.

[0025] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0026] Figure 3 A schematic diagram of the stamping drive assembly;

[0027] Figure 4 This is a structural diagram of the central wheel;

[0028] Figure 5 This is a schematic diagram of the pressure ring structure;

[0029] Figure 6 A three-dimensional structural diagram of the clamping assembly;

[0030] Figure 7 This is a cross-sectional view of the clamping assembly;

[0031] Figure 8 This is a schematic diagram of the skateboard's mounting structure.

[0032] Figure 9 for Figure 8 BB section view in the middle;

[0033] Figure 10 This is a schematic diagram of the speed regulating groove.

[0034] Figure 11 A schematic diagram of the installation structure for supporting pins.

[0035] In the diagram: 11. Support plate; 12. Workbench; 13. Vertical plate; 14. Horizontal beam; 141. First vertical plate; 142. Second vertical plate; 143. Third vertical plate; 144. Guide block; 15. Guide plate;

[0036] 21. Motor; 22. Center wheel; 221. First adjustment hole; 222. Second adjustment hole; 223. Third adjustment hole; 224. Fourth adjustment hole; 23. First connecting rod; 24. Second connecting rod; 241. Fixing block; 242. Pad; 25. First hinge shaft; 251. First limit nut; 26. Second hinge shaft; 261. Second limit nut; 27. Rotating shaft; 28. Coupling; 29. ​​Locking screw;

[0037] 31. Slider; 311. Guide rod; 312. Connecting block; 313. Groove; 32. Upper mold; 33. First set screw;

[0038] 41. Lower mold; 411. Third guide hole; 412. Oil reservoir ring groove; 42. Pressure ring; 43. Support pin; 44. Push plate;

[0039] 51. Base plate; 52. Slide plate; 521. Speed ​​regulating groove; 5211. First slow stroke section; 5212. Fast stroke section; 5213. Second slow stroke section; 53. Drive cylinder; 531. Mounting bracket; 54. Guide support; 55. Top rod; 551. Roller; 56. Guide frame; 561. First guide groove; 57. Guide rod; 571. Bracket; 58. Connecting rod; 59. Connecting plate. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0041] like Figure 1 As shown, a stamping device with adjustable stroke and speed functions includes a main frame, and the main frame is provided with a stamping drive assembly, an upper die assembly, a lower die assembly and a pressing assembly arranged sequentially from top to bottom.

[0042] In one specific embodiment, the main frame in this example includes a base, a workbench 12, upright plates 13, guide plates 15, and a crossbeam 14. The base includes two support plates 11, and the workbench 12 is located above the support plates 11, with both ends of the workbench 12 fixedly connected to the support plates 11 by welding. Two upright plates 13 are disposed above the workbench 12, and the lower ends of the two upright plates 13 are fixedly connected to the workbench 12 by welding. Preferably, the two upright plates 13 correspond one-to-one with the two support plates 11, and the upright plates 13 are located above the corresponding support plates 11. A crossbeam 14 is disposed directly above the two upright plates 13, and both ends of the crossbeam 14 are fixedly connected to the upper surface of the upright plates 13 by welding. The guide plate 15 is located between the crossbeam 14 and the workbench 12, and both ends of the guide plate 15 are fixedly connected to the upright plates 13 by welding.

[0043] The upper mold assembly includes a slider 31, which is slidably connected to the main frame and can slide up and down relative to the main frame. An upper mold 32 is provided on the lower side of the slider 31, and the upper mold 32 is fixedly connected to the slider 31 in a detachable manner.

[0044] In one specific embodiment, a guide rod 311 is fixedly provided on the upper side of the slider 31 by welding, and the upper end of the guide rod 311 extends through the guide plate 15 to the top of the guide plate 15. The guide plate 15 is provided with a first guide hole that cooperates with the guide rod 311.

[0045] In one specific embodiment, the lower side of the slider 31 is provided with a mounting groove. The mounting groove has a U-shaped cross-section with the opening facing downwards and extends horizontally through the slider 31. Preferably, the extension direction of the mounting groove is parallel to the upright plate 13. A plurality of connecting blocks 312 with inverted T-shaped cross-sections are provided on the upper side wall of the mounting groove. The upper side of the upper mold 32 is provided with connecting grooves that mate with the connecting blocks 312. A first set screw 33 is provided between the upper mold 32 and the slider 31. Under the tightening action of the first set screw 33, the upper mold 32 and the slider 31 can be locked and fixed.

[0046] Here, the first set screw 33 can be disposed on the upper mold 32, with its end pressing against the slider 31; alternatively, the first set screw 33 can be disposed on the slider 31, with its end pressing against the upper mold 32. In one specific embodiment, in this embodiment, a plurality of first set screws 33 are respectively disposed on two sides of the slider 31 parallel to the mounting groove. The slider 31 is provided with threaded holes that mate with the first set screws 33, and the ends of the first set screws 33 press against the side of the upper mold 32.

[0047] like Figure 1 and Figure 3 As shown, the stamping drive assembly includes a motor 21, a center wheel 22, a first connecting rod 23, and a second connecting rod 24. The motor 21 is detachably fixed to the crossbeam 14 of the main frame, and its power output shaft is connected to the center wheel 22, driving the center wheel 22 to rotate around its own axis. One end of the first connecting rod 23 is connected to the center wheel 22 via a first hinge shaft 25, and the center wheel 22 has an adjustment hole that mates with the first hinge shaft 25. The other end of the first connecting rod 23 is connected to the upper end of the second connecting rod 24 via a second hinge shaft 26. The lower end of the second connecting rod 24 passes through the guide plate 15 and connects to the slider 31. The guide plate 15 has a first clearance hole that allows the second connecting rod 24 to pass through.

[0048] like Figure 4As shown, a number of stroke adjustment hole groups are provided on the central gear 22. Each stroke adjustment hole group includes two stroke adjustment holes symmetrically arranged about the center of the central gear 22. The center distances of the two stroke adjustment holes in different stroke adjustment hole groups are different, and the connecting lines of the centers of the two stroke adjustment holes in a number of stroke adjustment hole groups divide the central gear 22 into a number of fan-shaped regions.

[0049] As a specific implementation manner, in this embodiment, four stroke adjustment hole groups are provided on the central gear 22. For the convenience of understanding the specific implementation manner of the present application, the four stroke adjustment hole groups are sequentially named as the first stroke adjustment hole group, the second stroke adjustment hole group, the third stroke adjustment hole group, and the fourth stroke adjustment hole group in ascending order of the center distance. Correspondingly, the stroke adjustment holes in the first stroke adjustment hole group are the first stroke adjustment holes 221, and the connecting line of the centers of the two first stroke adjustment holes 221 is the first center connecting line; the stroke adjustment holes in the second stroke adjustment hole group are the second stroke adjustment holes 222, and the connecting line of the centers of the two second stroke adjustment holes 222 is the second center connecting line; the stroke adjustment holes in the third stroke adjustment hole group are the third stroke adjustment holes 223, and the connecting line of the centers of the two third stroke adjustment holes 223 is the third center connecting line; the stroke adjustment holes in the fourth stroke adjustment hole group are the fourth stroke adjustment holes 224, and the connecting line of the centers of the two fourth stroke adjustment holes 224 is the fourth center connecting line. Among them, the center distance of the first stroke adjustment hole group (i.e., the distance between the two first stroke adjustment holes 221) is R1, the center distance of the second stroke adjustment hole group (i.e., the distance between the two second stroke adjustment holes 222) is R2, the center distance of the third stroke adjustment hole group (i.e., the distance between the two third stroke adjustment holes 223) is R3, the center distance of the fourth stroke adjustment hole group (i.e., the distance between the two fourth stroke adjustment holes 224) is R4, and R1 < R2 < R3 < R4. The first center connecting line, the second center connecting line, the third center connecting line, and the fourth center connecting line divide the central gear 22 into eight fan-shaped regions, and the central angle of each fan-shaped region is 45°.

[0050] This design not only makes the centrifugal force evenly distributed when the central gear 22 rotates, avoids extra vibration caused by uneven mass, and ensures the operation stability of the equipment, but also can select different stroke adjustment holes according to the plate thickness, improving the practicability. When the first connecting rod 23 is installed in the stroke adjustment hole groups with different center distances, during the rotation of the central gear 22, the movement trajectory of the end point of the first connecting rod 23 will change. At the same rotation angle of the central gear 22, for the stroke adjustment hole group with a larger center distance, the swing amplitude of the end point of the first connecting rod 23 is greater; while for the stroke adjustment hole group with a smaller center distance, the swing amplitude of the end point of the first connecting rod 23 is smaller, thereby realizing the stroke adjustment function for the upper die 32 and improving the adaptability to various processing tasks.

[0051] In one specific embodiment, a first vertical plate 141 and a second vertical plate 142 are sequentially fixed to the lower side of the crossbeam 14 by welding. The motor 21 is fixed to the first vertical plate 141 by bolt assembly, and the power output shaft of the motor 21 extends through the first vertical plate 141 to the side of the first vertical plate 141 facing the second vertical plate 142. A rotating shaft 27 is provided on the second vertical plate 142, and the rotating shaft 27 is rotatably connected to the second vertical plate 142 by a bearing assembly. The power output shaft of the motor 21 is connected to one end of the rotating shaft 27 by a coupling 28, and the rotating shaft 27 can rotate around its own axis under the drive of the motor 21. The center wheel 22 is detachably fixed to the other end of the rotating shaft 27. The first connecting rod 23 is located on the side of the center wheel 22 facing away from the second vertical plate 142, and the second connecting rod 24 is located on the side of the first connecting rod 23 facing away from the center wheel 22.

[0052] In one specific embodiment, the central wheel 22 in this embodiment has a mounting hole on the side facing the second vertical plate 142. This mounting hole is a blind hole. The end of the rotating shaft 27 is inserted into the mounting hole and connected to the central wheel 22 via a flat key (not shown in the figure), thereby achieving synchronous rotation of the rotating shaft 27 and the central wheel 22. The central wheel 22 is connected to the end face of the rotating shaft 27 via a locking screw 29. The side of the central wheel 22 facing away from the second vertical plate 142 has a countersunk hole for accommodating the locking screw 29, and the end face of the rotating shaft 27 has a threaded hole that mates with the locking screw 29.

[0053] In one specific embodiment, one end of the first hinge shaft 25 is fixedly connected to the first connecting rod 23 by welding, and a first limiting nut 251 is provided on the first hinge shaft 25 on the side of the central wheel 22 facing away from the first connecting rod 23. One end of the second hinge shaft 26 is fixedly connected to the first connecting rod 23 by welding, and a second limiting nut 261 is provided on the second hinge shaft 26 on the side of the second connecting rod 24 facing away from the first connecting rod 23.

[0054] Furthermore, such as Figure 1 and Figure 3As shown, a third vertical plate 143 is provided on the side of the crossbeam 14 opposite to the first vertical plate 141, located on the side of the second vertical plate 142. The upper end face of the third vertical plate 143 is fixedly connected to the lower side face of the crossbeam 14 by welding. A guide block 144 is provided between the second vertical plate 142 and the third vertical plate 143, and both ends of the guide block 144 are fixedly connected to the second vertical plate 142 and the third vertical plate 143, respectively. The guide block 144 is provided with a second guide hole that cooperates with the second connecting rod 24, and the second connecting rod 24 can slide up and down along the second guide hole.

[0055] As one specific implementation method, such as Figure 1 and Figure 2 As shown, in this embodiment, a fixing block 241 is welded to the lower end of the second connecting rod 24, and a groove 313 for accommodating the fixing block 241 is provided on the lower side of the slider 31. A pad 242 is provided on the lower side of the fixing block 241. This design achieves a reliable connection and buffer between the slider 31 and the second connecting rod 24. That is, through the cooperation of the groove 313 and the fixing block 241, the impact load of the upper mold 32 is transferred to the pad 242, reducing direct rigid contact and thus reducing vibration and wear during movement. In addition, the combination of the fixing block 241 and the pad 242 not only plays a role in stabilizing the connection, but the elastic deformation of the pad 242 can also absorb some of the impact energy and extend the service life of the equipment.

[0056] like Figure 1 As shown, the lower mold assembly includes a lower mold 41, a pressure ring 42, a support pin 43, and a push plate 44. The lower mold 41 is detachably fixed to the worktable 12. The pressure ring 42 is located on the upper side of the lower mold 41, the push plate 44 is located on the lower side of the worktable 12, and the support pin 43 is located between the pressure ring 42 and the push plate 44. The lower end of the support pin 43 is fixedly connected to the push plate 44 by welding, and the upper end of the support pin 43 passes through the worktable 12 and the lower mold 41 in sequence and is detachably connected to the pressure ring 42. The lower mold 41 is provided with a third guide hole 411 that cooperates with the support pin 43, and the worktable 12 is provided with a second clearance hole for avoiding the support pin 43. The pressure ring 42, support pin 43 and push plate 44 together form a rigid frame and can move up and down relative to the lower mold 41 and worktable 12.

[0057] As one specific implementation method, such as Figure 5 As shown, in this embodiment, six support pins 43 are evenly distributed along the circumference of the pressure ring 42 between the pressure ring 42 and the push plate 44.

[0058] The pressure ring 42 has a circular ring structure, with six circumferentially distributed support pins 43 beneath it. This design ensures stable support and uniform stress distribution for the pressure ring 42. Specifically, the six circumferentially distributed support pins 43 disperse the load pressure, thereby improving the uniformity of the pressure ring 42's load-bearing capacity. Furthermore, the six support pins 43 not only support the pressure ring 42, but their symmetrical arrangement also prevents the pressure ring 42 from tilting.

[0059] The clamping part is located below the push plate 44 and is used to drive the rigid frame to move up and down.

[0060] like Figure 6 , Figure 7 and Figure 8 As shown, the clamping assembly includes a base plate 51. Both ends of the base plate 51 can be fixedly connected to the support plate 11, or they can be left unconnected. A sliding plate 52 is slidably mounted on the base plate 51. The sliding plate 52 can reciprocate horizontally relative to the base plate 51, and a driving cylinder 53 is provided between the base plate 51 and the sliding plate 52 to drive the sliding plate 52 to reciprocate relative to the base plate 51. A guide support 54 is provided on the base plate 51, and a push rod 55 is provided on the guide support 54, capable of sliding up and down relative to the guide support 54. The upper end of the push rod 55 is detachably fixedly connected to the push plate 44, and the lower end of the push rod 55 is provided with a roller 551. The sliding plate 52 is provided with a speed regulating groove 521 that cooperates with the roller 551. The roller 551 is located in the speed regulating groove 521. When the slide plate 52 reciprocates relative to the base plate 51 under the drive of the drive cylinder 53, the top rod 55 can be driven to move up and down through the cooperation of the speed regulating groove 521 and the roller 551, thereby driving the rigid frame to move up and down.

[0061] like Figure 10As shown, the speed regulating groove 521 is divided into a first slow stroke section 5211, a fast stroke section 5212, and a second slow stroke section 5213 from bottom to top. The curvature of each section of the speed regulating groove 521 is different, and the transition between adjacent sections is smooth. When the slide plate 52 moves at a constant speed under the drive of the hydraulic cylinder 53, the lifting speed of the push rod 55 is slow when the roller 551 is engaged with the first slow stroke section 5211 and the second slow stroke section 5213, and fast when the roller 551 is engaged with the fast stroke section 5212. This design achieves adjustment and process optimization of the movement speed of the pressure ring 42. Specifically, by using arc-shaped groove sections with different curvatures, the movement process of the pressure ring 42 is divided into three stages: slow-fast-slow. The first slow stroke section 5211 and the second slow stroke section 5213 ensure smooth start and stop of the pressure ring 42, reducing the degree of collision impact. The fast stroke section 5212 improves stroke efficiency, shortens the stamping cycle, and increases production efficiency. In addition, the differentiated design of curvature in each section not only meets the speed requirements, but its smooth transition groove structure can also effectively reduce mechanical vibration and extend the service life of the equipment.

[0062] As one specific implementation method, such as Figure 8 and Figure 9 As shown, in this embodiment, a guide frame 56 is provided on the base plate 51. The guide frame 56 includes a horizontal bar and vertical bars located at both ends of the horizontal bar. The lower ends of the vertical bars are fixedly connected to the base plate 51 by welding, and the upper ends of the vertical bars are fixedly connected to the horizontal bar by welding. The horizontal bar and the vertical bars together form a gantry structure. A guide rod 57 is provided on the base plate 51 between the two vertical bars. The guide rod 57 is located directly below the horizontal bar, and both ends of the guide rod 57 are connected to the base plate 51 by brackets 571. A first guide groove 561 is provided on the lower side of the horizontal bar. The upper end of the slide plate 52 extends into the first guide groove 561 and forms a guiding engagement with the first guide groove 561. A second guide groove is provided at the lower end of the slide plate 52 to engage with the guide rod 57. The cross-section of the second guide groove is arc-shaped and forms a guiding engagement with the guide rod 57.

[0063] The lower end of the slide plate 52 is mounted on the guide rod 57, and the upper end of the slide plate 52 is mounted in the first guide groove 561. This design constitutes a spatial constraint structure, which can make the force on the slide plate 52 more balanced, effectively prevent the slide plate 52 from deviating or shaking during the movement, and ensure its movement accuracy.

[0064] In one specific embodiment, the bracket 571 in this embodiment includes a mounting sleeve sleeved on the outside of the guide rod 57. A support column is provided below the mounting sleeve. The upper end of the support column is fixedly connected to the mounting sleeve by welding. The lower end of the support column is fixedly connected to the base plate 51 by detachment. A second set screw (not shown in the figure) is provided on the mounting sleeve for tightening the guide rod 57.

[0065] Furthermore, the base plate 51 is provided with two parallel sliding plates 52, and the two sliding plates 52 are slidably connected to the base plate 51 through guide frames 56 and guide rods 57, respectively. The driving cylinder 53 is located between the two sliding plates 52. The cylinder body of the driving cylinder 53 is fixedly connected to the base plate 51 through a mounting bracket 531. The piston rod end of the driving cylinder 53 is detachably connected to a connecting rod 58. The two ends of the connecting rod 58 are respectively connected and fixed to the sliding plates 52. The base plate 51 is provided with two guide supports 54, which correspond one-to-one with the two sliding plates 52, and the guide supports 54 are located on the outer side of the corresponding sliding plate 52 (with the side of the two sliding plates 52 facing each other as the inner side). The roller 551 at the lower end of the push rod 55 on the guide support 54 is located in the speed adjustment groove 521 of the corresponding slide plate 52. When the drive cylinder 53 is activated, it can drive the two slide plates 52 to slide back and forth relative to the base plate 51 at the same time, thereby driving the two push rods 55 to move up and down synchronously.

[0066] Furthermore, a connecting plate 59 is provided between the two push rods 55. The upper end of the push rod 55 is fixedly connected to the connecting plate 59 by means of a flange connection. The connecting plate 59 is fixedly connected to the push plate 44 in a detachable manner.

[0067] By setting two slide plates 52 and placing the drive cylinder 53 between the two slide plates 52, the force balance can be ensured, avoiding the problem of jamming or even seizing due to uneven load.

[0068] Furthermore, such as Figure 11As shown, the inner wall of the third guide hole 411 of the lower mold 41 has several oil storage ring grooves 412 with a semi-circular cross-section arranged from top to bottom. The support pin 43 and the lower mold 41 are fitted with a transition fit, and the oil storage ring grooves 412 are filled with grease. The support pin 43 has C1 and C2 scale markings arranged from top to bottom. When the scale marking C1 is aligned with the upper side of the lower mold 41, the pressure ring 42 is at its lowest point. The horizontality of the pressure ring 42 can be determined by observing whether the C1 scale marking of each support pin 43 is aligned with the upper side of the lower mold 41. When the scale marking C2 is aligned with the upper side of the lower mold 41, the pressure ring 42 presses the sheet metal tightly against the upper mold 32. This design allows the travel range of the pressure ring 42 to be visualized. In addition, the grease in the oil storage ring groove 412 of the lower mold 41 reduces the frictional resistance when the support pin 43 slides, and stores the sheet metal debris in the oil storage ring groove 412 to prevent the debris from affecting the positioning accuracy.

[0069] During operation, the sheet metal is first placed on the pressure ring 42. Then, the driving cylinder 53 of the clamping unit actuates, causing the pressure ring 42 and the sheet metal to move upward together until the sheet metal is pressed against the upper mold 32. Next, the motor 21 of the stamping drive unit actuates, driving the center wheel 22 to rotate, thereby causing the slider 31 to move downward. Simultaneously, the pressure ring 42, pressed against the upper mold 32, moves downward together with the slider 31 and the upper mold 32 until the upper mold 32 and the lower mold 41 close, completing the stamping of the sheet metal. During the downward movement of the pressure ring 42 along with the slider 31 and the upper mold 32, the rodless chamber of the driving cylinder 53 maintains a certain pressure. This pressure, through the pressure ring 42, presses the sheet metal against the upper mold 32, preventing separation of the sheet metal from the upper mold 32. Furthermore, as the slider 31 moves downward, the piston rod of the driving cylinder 53 passively retracts.

[0070] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0071] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A stamping device with adjustable stroke and speed functions, comprising a main frame, wherein a stamping drive assembly, an upper die assembly, and a lower die assembly are arranged sequentially from top to bottom within the main frame, characterized in that: The upper die assembly comprises a slider (31) slidingly connected with the main frame, and an upper die (32) arranged on the slider (31); The stamping driving assembly comprises a center wheel (22) and a motor (21) for driving the center wheel (22) to rotate, one end of a first connecting rod (23) is hingedly connected with a pitch hole on the center wheel (22), the other end of the first connecting rod (23) is hingedly connected with an upper end of a second connecting rod (24), and a lower end of the second connecting rod (24) is connected with the slider (31); The center wheel (22) is provided with a plurality of pitch hole groups, each pitch hole group comprises two pitch holes arranged symmetrically about the center of the center wheel (22), the centers of the two pitch holes in different pitch hole groups are different, and the centers of the two pitch holes in the plurality of pitch hole groups are connected and the center wheel (22) is divided into two parts; The lower die assembly comprises a lower die (41) arranged on the main frame, a pressure ring (42) and a push-up plate (44) arranged on the upper and lower sides of the lower die (41) respectively, a support pin (43) arranged on the push-up plate (44), the upper end of the support pin (43) penetrating through the lower die (41) and connected with the pressure ring (42), and a third guide hole (411) arranged on the lower die (41) and matched with the support pin (43); A pressing assembly is arranged below the lower die assembly; The pressing assembly comprises a bottom plate (51), a sliding plate (52) slidingly arranged on the bottom plate (51), a driving oil cylinder (53) arranged between the bottom plate (51) and the sliding plate (52), a guide support (54) arranged on the bottom plate (51), a top rod (55) slidingly arranged on the guide support (54), a roller (551) arranged on the lower end of the top rod (55), a speed adjusting groove (521) arranged on the sliding plate (52) and matched with the roller (551), the speed adjusting groove (521) is divided into a first slow stroke section (5211), a fast stroke section (5212) and a second slow stroke section (5213) from bottom to top, when the sliding plate (52) reciprocates relative to the bottom plate (51) under the driving of the driving oil cylinder (53), the top rod (55) can drive the pressure ring (42) to move up and down under the driving of the sliding plate (52), and the lifting speed of the top rod (55) when the roller (551) is matched with the first slow stroke section (5211) and the second slow stroke section (5213) is less than the lifting speed of the top rod (55) when the roller (551) is matched with the fast stroke section (5212).

2. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 1, characterized in that: The main frame comprises a base, a workbench (12), a vertical plate (13), a guide plate (15) and a crossbeam (14), the base comprises two support plates (11), the workbench (12) is above the support plates (11), and the two ends of the workbench (12) are fixedly connected with the support plates (11) respectively, two vertical plates (13) are arranged above the workbench (12), a crossbeam (14) is arranged above the two vertical plates (13), the guide plate (15) is between the crossbeam (14) and the workbench (12), and the two ends of the guide plate (15) are fixedly connected with the vertical plates (13) respectively.

3. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 2, characterized in that: A guide rod (311) is arranged on the sliding block (31), and a first guide hole matched with the guide rod (311) is arranged on the guide plate (15).

4. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 2, characterized in that: A first vertical plate (141) and a second vertical plate (142) are arranged on the lower side of the crossbeam (14), the motor (21) is arranged on the first vertical plate (141), a rotating shaft (27) is rotatably arranged on the second vertical plate (142), the power output shaft of the motor (21) is connected with one end of the rotating shaft (27) through a shaft coupling (28), and the central wheel (22) is connected with the other end of the rotating shaft (27).

5. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 4, characterized in that: A third vertical plate (143) is arranged on the side of the crossbeam (14) away from the first vertical plate (141) and located on the second vertical plate (142), a guide block (144) is arranged between the second vertical plate (142) and the third vertical plate (143), the two ends of the guide block (144) are fixedly connected with the second vertical plate (142) and the third vertical plate (143) respectively, and a second guide hole matched with the second connecting rod (24) is arranged on the guide block (144).

6. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 1, characterized in that: The lower end of the second connecting rod (24) is provided with a fixed block (241), the lower side of the sliding block (31) is provided with a groove (313) for accommodating the fixed block (241), and the lower side of the fixed block (241) is provided with a backing plate (242).

7. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 1, characterized in that: The bottom plate (51) is provided with a guide frame (56), the guide frame (56) comprises a horizontal rod and vertical rods located at the two ends of the horizontal rod, guide rods (57) are arranged on the bottom plate (51) between the two vertical rods, the two ends of the guide rods (57) are connected with the bottom plate (51) through supports (571) respectively, a first guide groove (561) is arranged on the lower side of the horizontal rod, the upper end of the sliding plate (52) is in guide cooperation with the first guide groove (561), and the lower end of the sliding plate (52) is provided with a second guide groove matched with the guide rods (57).

8. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 1, characterized in that: The bottom plate (51) is provided with two parallel sliding plates (52), the driving oil cylinder (53) is located between the two sliding plates (52), the bottom plate (51) is provided with two guide supports (54) corresponding to the sliding plates (52), the guide supports (54) are located outside the corresponding sliding plates (52), two top rods (55) are connected with the connecting plates (59) respectively, and the connecting plates (59) are connected with the push top plate (44).

9. The stamping apparatus having the function of adjusting the stroke and the speed according to claim 1, characterized in that: A plurality of oil storage ring grooves (412) are arranged on the inner side wall of the third guide hole (411), the support pin (43) is in transition fit with the lower mold (41), and the oil storage ring grooves (412) are filled with lubricating grease.

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