A multi-station punching device

Abstract

The present application relates to a multi-station punching device, which relates to the technical field of stamping equipment, and includes a frame, an upper die frame, and a driving member that drives the upper die frame to rise and fall; it is characterized in that it also includes a trigger mechanism, which includes a trigger support installed on the upper die frame, a punching rod slidably installed on the trigger support, an intermediate connecting rod hinged at one end to the top of the punching rod, a trigger connecting rod hinged at the other end of the intermediate connecting rod, and an abutment block installed on the frame and arranged corresponding to the trigger connecting rod; the trigger connecting rod is hinged to the upper die frame and includes a first hinged section located on one side of the hinge and hinged to the intermediate connecting rod, and a second hinged section located on the other side of the hinge and used to abut against the abutment block; the abutment block has a trigger surface for the second hinged section to abut and drive the trigger connecting rod to rotate; in the process of the upper die frame moving from the second station to the first station, the second hinged section always abuts against the trigger surface and drives the punching rod to move downward. The present application has the effect of facilitating demoulding.

Description

Technical Field

[0001] The present application relates to the technical field of stamping equipment, and in particular to a multi-station punching device. Background Art

[0002] The material strip can be punched through a press to change its surface shape and realize the processing of the workpiece. The principle of the existing stamping die is to directly press down the upper die to hit the workpiece, and the change of the shape of the workpiece is also achieved through the bottom surface of the upper die that matches the changed shape.

[0003] The existing punching device comprises an upper die and a lower die, wherein the lower die is provided with a punch and the upper die is provided with a cavity for forming a product.

[0004] With respect to the above-mentioned related technologies, the inventor believes that the product may remain in the cavity after being punched into the cavity by the punch, making it inconvenient to demold. Summary of the invention

[0005] In order to facilitate demoulding, the present application provides a workstation punching device.

[0006] The multi-station punching device provided in this application adopts the following technical solution:

[0007] A multi-station punching device comprises a frame, an upper mold frame, and a driving member that drives the upper mold frame to rise and fall, and the upper mold frame has a first station and a second station located below the first station after being driven by the driving member; it is characterized in that it also includes a trigger mechanism, the trigger mechanism comprises a trigger support installed on the upper mold frame, a punching rod slidably installed on the trigger support, an intermediate connecting rod hinged at one end to the top of the punching rod, a trigger connecting rod hinged at the other end of the intermediate connecting rod, and an abutment block installed on the frame and arranged corresponding to the trigger connecting rod; the trigger connecting rod is hinged to the upper mold frame and comprises a first hinged section located on one side of the hinge and hinged to the intermediate connecting rod, and a second hinged section located on the other side of the hinge and used to abut against the abutment block; the abutment block has a trigger surface for the second hinged section to abut and drive the trigger connecting rod to rotate; in the process of the upper mold frame moving from the second station to the first station, the second hinged section always abuts against the trigger surface and drives the punching rod to move downward.

[0008] By adopting the above technical solution, the driving member drives the upper mold frame to move upward, so that the upper mold frame moves from the second station to the first station, the second hinged section abuts against the firing surface, the second hinged section rotates to drive the first hinged section to rotate, the first hinged section moves the knockout rod downward, the knockout rod pushes the product out, and facilitates the demolding of the product.

[0009] Optionally, a roller is rotatably provided at one end of the second hinged section away from the first hinged section.

[0010] By adopting the above technical solution and setting a roller, the second hinged section can use the roller to contact the contact surface when moving, thereby converting the original sliding friction into rolling friction, reducing the friction force, making the movement of the second hinged section more stable, thereby making the sliding of the punching rod more stable and smoother, thereby making the ejection of the product more stable, and reducing the risk of wear of the second hinged section, thereby increasing the life of the second hinged section.

[0011] Optionally, the trigger surface includes a first abutting surface, a second abutting surface located above the first abutting surface, and an inclined surface arranged between the first abutting surface and the second abutting surface, and the inclined surface is gradually increased from one end close to the first abutting surface to an end close to the second abutting surface.

[0012] By adopting the above technical solution, by setting the first abutting surface, the second abutting surface and the inclined surface, when the second hinged section moves with the movement of the upper mold frame, the second hinged section slides from the first abutting surface to the inclined surface, and since the inclined surface is gradually increased from one end close to the first abutting surface to the end close to the second abutting surface, the second hinged section will rotate along the rotation axis when moving from the first abutting surface to the second abutting surface, and the second hinged section drives the first hinged section to rotate. The first hinged section is driven by the intermediate connecting rod to move the punching rod downward to eject the product, thereby facilitating the demolding of the product.

[0013] Optionally, the trigger support includes a mounting sleeve rotatably mounted on the upper mold frame, a base mounted on the outside of the mounting sleeve and threadedly connected to the mounting sleeve, and a tensioning assembly connected to the top of the base and used to tighten the base on the upper mold frame; the base is rotatably mounted with a sleeve vertically slidably connected to the inside of the mounting sleeve and circumferentially locked with the mounting sleeve, and a driving assembly driving the sleeve to rotate; the mounting sleeve has a first guide hole for sliding cooperation with the upper portion of the knocking rod; the sleeve has a second guide hole for sliding cooperation with the lower portion of the knocking rod.

[0014] By adopting the above technical solution, the driving assembly drives the sleeve to rotate, and the sleeve drives the mounting sleeve to rotate. Since the base is threadedly connected to the mounting sleeve and is tightened on the upper mold frame through the tightening assembly, the base moves to the side away from the upper mold frame or to the side close to the upper mold frame, and the distance between the base and the upper mold frame is adjusted, thereby adjusting the mold height to accommodate products of different heights.

[0015] Optionally, the tensioning assembly includes a fixing rod threadedly connected to the top of the base and passing through the upper mold frame, a fixing cover rotatably sleeved on the peripheral side wall of the fixing rod, and a first elastic member arranged between the base and the fixing cover.

[0016] By adopting the above technical solution, by setting a fixing rod, a fixing cover and a first elastic member, by passing the fixing rod through the upper mold frame, the first elastic member is sleeved on the fixing rod, and the fixing cover presses the first elastic member toward the base, so that the two ends of the spring are always pressed toward the ends that are away from each other, so that the base is fixed on the upper mold frame, which facilitates the adjustment of the mold height.

[0017] Optionally, a second elastic member is further provided between the fixed cover and the upper mold frame, and the second elastic member is located inside the first elastic member.

[0018] By adopting the above technical solution and providing the second elastic member, the base can be fixed more stably.

[0019] Optionally, the driving assembly includes a worm wheel vertically slidably connected to the outside of the sleeve and axially locked with the sleeve, and a worm screw rotatably disposed in the base and drivingly connected to the worm wheel.

[0020] By adopting the above technical solution, a worm and a worm wheel are provided, and the rotation of the worm drives the worm wheel to rotate. Since the worm wheel is arranged on the outer peripheral wall of the sleeve and is axially locked with the sleeve, the sleeve is driven to rotate, and the sleeve drives the installation sleeve to rotate, and the installation sleeve drives the base to slide, thereby facilitating the adjustment of the mold height.

[0021] Optionally, the knocking rod includes an upper ejector rod and a lower ejector rod, the lower ejector rod is threadedly connected to the bottom of the upper ejector rod, and the lower ejector rod is slidably connected to the inner side of the sleeve and is circumferentially locked with the sleeve.

[0022] By adopting the above technical solution, an upper push rod and a lower push rod are set, and the lower push rod is circumferentially locked with the sleeve. When the sleeve moves, the lower push rod is driven to rotate. Since the lower push rod is threadedly connected to the upper push rod, the lower push rod moves with the movement of the base, reducing the probability of deviation between the lower push rod and the bottom end of the base.

[0023] Optionally, the pitch of the upper push rod is consistent with the pitch of the mounting sleeve.

[0024] By adopting the above technical solution, by setting the pitch of the upper ejector rod and the pitch of the mounting sleeve to be consistent, the moving distance of the base and the moving distance of the upper ejector rod are kept consistent, and the distance between the lower ejector rod and the bottom surface of the base is kept consistent, thereby reducing the risk of the lower ejector rod failing to eject the product.

[0025] Optionally, the upper mold frame has an empty groove for the base to slide.

[0026] By adopting the above technical solution, by providing an empty groove for the base to slide on the upper mold frame, the sliding of the base is made more stable, thereby improving the accuracy of mold height adjustment, and further making the ejection of the product more stable.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. A multi-station punching device is provided with a trigger mechanism so that the lower ejector rod can eject the product, which facilitates the demoulding of the product;

[0029] 2. A multi-station punching device adjusts the distance between the base and the upper mold frame by setting a trigger support, thereby adjusting the mold height to accommodate products of different heights;

[0030] 3. A multi-station ejection device sets an upper ejector rod and a lower ejector rod so that the distance between the lower ejector rod and the bottom surface of the base remains consistent, reducing the risk of the lower ejector rod failing to eject the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a multi-station punching device;

[0032] Figure 2 is a cross-sectional view of the upper die frame and the trigger mechanism;

[0033] Figure 3 is a cross-sectional view of the trigger support;

[0034] Figure 4 is a cross-sectional view of the abutment block and adjustment assembly.

[0035] Description of reference numerals: 1, frame; 2, upper mold frame; 21, first side plate; 22, second side plate; 221, make way groove; 222, hinge seat; 23, connecting plate; 231, through hole; 232, guide sleeve; 2321, empty groove; 233, embedded groove; 24, top plate; 25, bottom plate; 3, trigger mechanism; 31, trigger support; 311, mounting sleeve; 3111, threaded section; 3112, nut; 3113, first guide hole; 3114, second guide hole; 312, base; 3121, mounting groove; 3122, fixing groove; 31221, fixing ring; 31222, abutting ring; 3123, rotating hole; 313, tensioning assembly; 3131, fixing rod; 3132, fixing cover; 31321, cover groove; 3133, limiting piece; 31 34. first elastic member; 3135. second elastic member; 314. sleeve; 315. drive assembly; 3151. worm wheel; 3152. worm; 32. punching rod; 321. upper ejector rod; 322. lower ejector rod; 3221. connecting rod; 3222. punch rod; 33. intermediate connecting rod; 34. trigger connecting rod; 341. first hinge section; 342. second hinge section; 35. abutment block; 351. trigger surface; 3511. first abutment surface; 3512. inclined surface; 3513. second abutment surface; 4. drive member; 3421. roller; 5. adjustment assembly; 51. first support plate; 52. second support plate; 521. waist-shaped hole; 53. first fixing plate; 54. second fixing plate; 55. fixing bolt; 56. support plate; 561. adjustment screw. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-4 This application is described in further detail.

[0037] The embodiment of the present application discloses a multi-station punching device.

[0038] Reference Figure 1 A multi-station punching device includes a frame 1, an upper mold frame 2, a driving member 4 and a trigger mechanism 3.

[0039] Reference Figure 2 The upper mold frame 2 includes a first side plate 21, a second side plate 22 arranged parallel to one side of the first side plate 21, a connecting plate 23 vertically arranged between the first side plate 21 and the second side plate 22 by bolts, a top plate 24 fixed to one end of the first side plate 21 and the second side plate 22 by bolts, and a bottom plate 25 fixed to the first side plate 21 and the second side plate 22 by bolts at one end away from the top plate 24.

[0040] The driving member 4 is arranged in the frame 1, and the output end of the driving member 4 protrudes from the frame 1. The driving member 4 can be set as a cylinder or an oil cylinder. In this embodiment, it is preferably set as an oil cylinder. The end of the top plate 24 away from the bottom plate 25 is fixed to the oil rod of the driving member 4 by bolts. The oil rod of the driving member 4 can drive the upper mold frame 2 to slide back and forth along the height direction of the frame 1, so that the upper mold frame 2 has a first station and a second station located below the first station.

[0041] The trigger mechanism 3 is provided with multiple groups, and the multiple groups of trigger mechanisms 3 are evenly spaced along the length direction of the connecting plate 23. The trigger mechanism 3 includes a trigger support 31, a punching rod 32, an intermediate connecting rod 33, a trigger connecting rod 34 and an abutment block 35.

[0042] Reference Figure 2 and Figure 3 The trigger support 31 includes a mounting sleeve 311, a base 312 and a tensioning assembly 313. A threaded section 3111 is integrally provided at one end of the mounting sleeve 311, and a through hole 231 is provided on the connecting plate 23 for the threaded section 3111 to pass through. One end of the mounting sleeve 311 close to the threaded section 3111 abuts against one end of the connecting plate 23 close to the bottom plate 25. A plurality of nuts 3112 are threadedly connected to the threaded section 3111. In this embodiment, the number of nuts 3112 is preferably 3, and the three nuts 3112 are axially arranged along the threaded section 3111. The nut 3112 at the bottom abuts against one end of the connecting plate 23 away from the bottom plate 25, thereby limiting the axial sliding of the threaded section 3111 along the through hole 231, thereby fixing the mounting sleeve 311. The base 312 is threadedly connected to the outer wall of the mounting sleeve 311. A guide sleeve 232 is vertically arranged between the connecting plate 23 and the bottom plate 25. A slot 2321 is provided on the guide sleeve 232. The slot 2321 is axially arranged along the guide sleeve 232. The base 312 is slidably inserted into the slot 2321. The slot 2321 limits the base 312 to slide only along the axial direction of the guide sleeve 232.

[0043] Reference Figure 2The base 312 is tightened on the connecting plate 23 through the tightening assembly 313. The tightening assembly 313 includes a fixing rod 3131, a fixing cover 3132, a limiting piece 3133, a first elastic member 3134 and a second elastic member 3135. The fixing rod 3131 is threadedly connected to one end of the base 312 close to the connecting plate 23, the fixing rod 3131 vertically passes through the connecting plate 23, the fixing cover 3132 is located on a side of the connecting plate 23 away from the base 312, the fixing cover 3132 vertically passes through the fixing rod 3131, and a cover groove 31321 is provided at one end of the fixing cover 3132 close to the connecting plate 23. The first elastic member 3134 is sleeved on the outer wall of the fixing rod 3131, one end of the first elastic member 3134 is embedded in the cover groove 31321, and the other end of the first elastic member 3134 abuts against the connecting plate 23. The second elastic member 3135 is sleeved on the outer wall of the fixing rod 3131, and one end of the second elastic member 3135 is embedded in the cover groove 31321. The end of the connecting plate 23 close to the fixing cover 3132 is provided with an embedding groove 233 for the other end of the second elastic member 3135 to be embedded. The first elastic member 3134 and the second elastic member 3135 are preferably configured as springs. The limiting piece 3133 is threadedly connected to the fixing rod 3131, and the limiting piece 3133 is located at the end of the fixing cover 3132 away from the connecting plate 23. By rotating the limiting piece 3133, the fixing cover 3132 is driven to move toward the connecting plate 23, and the fixing cover 3132 presses the first elastic member 3134 and the second elastic member 3135, so that the base 312 can move downward but always has a tendency to be locked upward.

[0044] Reference Figure 3 The punching rod 32 includes an upper ejector rod 321 and a lower ejector rod 322. A first guide hole 3113 is provided at one end of the threaded section 3111 away from the bottom plate 25. The first guide hole 3113 is axially arranged along the base 312. The upper ejector rod 321 is slidably inserted into the first guide hole 3113. A second guide hole 3114 is provided at one end of the mounting sleeve 311 away from the connecting plate 23. The second guide hole 3114 is axially arranged along the base 312. The second guide hole 3114 and the first guide hole 3113 are connected to each other. The lower ejector rod 322 is slidably inserted into the second guide hole 3114. The diameter of the lower ejector rod 322 is greater than the diameter of the upper ejector rod 321. A screw hole is provided at one end of the lower ejector rod 322 close to the upper ejector rod 321. The lower ejector rod 322 is threadedly connected to the side wall of the upper ejector rod 321 through the screw hole.

[0045] Reference Figure 2, one end of the intermediate connecting rod 33 is hinged to the end of the upper push rod 321 away from the lower push rod 322. The trigger connecting rod 34 includes a first hinged section 341 and a second hinged section 342 which is integrally and vertically arranged at one end of the first hinged section 341. One end of the first hinged section 341 away from the second hinged section 342 is hinged to the end of the intermediate connecting rod 33 away from the upper push rod 321 through a rotating shaft, and a clearance groove 221 for the first hinged section 341 to pass through is provided on the second side plate 22. An articulated seat 222 is provided at one end of the second side plate 22 away from the first side plate 21 through bolts, and the connection between the first articulated section 341 and the second articulated section 342 is hinged to the articulated seat 222 through a rotating shaft. A roller 3421 is provided at one end of the second articulated section 342 away from the first articulated section 341 through a rotating shaft.

[0046] Reference Figure 4 The end of the abutment block 35 away from the second side plate 22 is provided with an adjustment assembly 5. The adjustment assembly 5 includes a first support plate 51, a second support plate 52 arranged parallel to one side of the first support plate 51, a first fixing plate 53 welded and fixed to one end of the first support plate 51 and the second support plate 52, and a second fixing plate 54 welded and fixed to one side of the first support plate 51 and the second support plate 52 away from the first fixing plate 53. The first fixing plate 53 is fixed to the frame 1 by bolts. The first support plate 51 and the second support plate 52 are both vertically provided with waist-shaped holes 521, which penetrate the plate surface of the first support plate 51 / the second support plate 52. There are two groups of waist-shaped holes 521, which are arranged along the length direction of the first support plate 51. The abutment block 35 is provided with screw holes corresponding to the waist-shaped holes 521, and the inner threads of the screw holes are connected with fixing bolts 55 passing through the waist-shaped holes 521. The height of the abutment block 35 can be adjusted by adjusting the position of the fixing bolts 55 on the waist-shaped holes 521, so as to adapt to products of different heights. The adjustment assembly 5 also includes a support plate 56 welded to the end of the second fixed plate 54 away from the first fixed plate 53 and an adjustment screw 561 threadedly connected to the support plate 56. The rod portion of the adjustment screw 561 passes through the support plate 56 and abuts against the abutment block 35. By rotating the adjustment screw 561, the abutment block 35 is moved along the length direction of the first support plate 51, which facilitates the adjustment of the abutment block 35 and makes the adjustment of the abutment block 35 more precise.

[0047] The abutment block 35 is located at one side of the second hinge section 342. The abutment block 35 has a trigger surface 351 for the roller 3421 to continuously abut. The trigger surface 351 includes a first abutment surface 3511, a second abutment surface 3513 located on the upper side of the first abutment surface 3511, and an inclined surface 3512 disposed between the first abutment surface 3511 and the second abutment surface 3513. The inclined surface 3512 is disposed with a gradually increasing inclination from one end close to the first abutment surface 3511 to one end close to the second abutment surface 3513.

[0048] When the driving member 4 drives the upper mold frame 2 to move from the second station to the first station, the roller 3421 moves with the movement of the upper mold frame 2. When the roller 3421 rolls along the first abutting surface 3511 to the inclined surface 3512, it gradually moves from the first inclined surface 3512 to the second abutting surface 3513. The roller 3421 gradually moves toward the second side plate 22 during the rolling process. The roller 3421 drives the first hinge section 341 to rotate along the hinge axis, so that the first hinge section 341 moves toward the connecting plate 23, so that the upper ejector rod 321 moves axially along the first guide hole 3113, and the upper ejector rod 321 drives the lower ejector rod 322 to move toward the opening of the second guide hole 3114, so as to eject the product.

[0049] Reference Figure 3 The trigger support 31 also includes a sleeve 314 and a drive assembly 315. The sleeve 314 is inserted into the second guide hole 3114. The sleeve 314 is vertically slidably connected to the inner side of the mounting sleeve 311 and is circumferentially locked with the mounting sleeve 311. In this embodiment, the sleeve 314 and the mounting sleeve 311 are connected by a key. A key slot is provided on the outer wall of the sleeve 314. The key is fixed in the key slot by bolts. A sliding groove is provided on the inner wall of the mounting sleeve 311, so that the sleeve 314 and the mounting sleeve 311 are circumferentially locked and axially slidable.

[0050] The driving assembly 315 includes a worm wheel 3151 and a worm 3152. The base 312 is provided with a mounting groove 3121 at the opening of the second guide hole 3114. The mounting groove 3121 is arranged axially along the base 312. The worm wheel 3151 is embedded in the mounting groove 3121. The worm wheel 3151 is vertically slidably connected to the outside of the sleeve 314 and is circumferentially locked with the sleeve 314. In this embodiment, the worm wheel 3151 and the sleeve 314 are connected by a key. The outer wall of the sleeve 314 is provided with a corresponding keyway. The key is fixed in the keyway of the sleeve 314 by bolts. The inner wall of the worm wheel 3151 is provided with a sliding groove for the keyway to slide, so that the worm wheel 3151 and the sleeve 314 are circumferentially locked and the worm wheel 3151 and the sleeve 314 are axially slidable. A fixing groove 3122 is provided on the bottom surface of the base 312. The fixing groove 3122 is arranged along the axial direction of the base 312 and is communicated with the mounting groove 3121. A fixing ring 31221 is fixed in the fixing groove 3122 by bolts. An abutment ring 31222 is integrally provided at one end of the fixing ring 31221 close to the worm gear 3151. The abutment ring 31222 abuts against the worm gear 3151, thereby limiting the axial movement of the worm gear 3151 along the sleeve 314 and fixing the worm gear 3151.

[0051] A rotating hole 3123 is formed on the base 312 . The rotating hole 3123 is communicated with the mounting groove 3121 . The worm 3152 is rotatably connected in the rotating hole 3123 , and the worm 3152 is drivingly connected with the worm wheel 3151 .

[0052] The worm 3152 drives the worm wheel 3151 to rotate. Since the worm wheel 3151 and the sleeve 314 are connected by a key, the worm wheel 3151 drives the sleeve 314 to rotate. Since the sleeve 314 and the mounting sleeve 311 are connected by a key, the sleeve 314 drives the mounting sleeve 311 to rotate. Since the base 312 and the mounting sleeve 311 are threadedly connected, and the base 312 is tightened on the connecting plate 23, the base 312 can move away from the connecting plate 23, thereby adjusting the distance between the bottom surface of the base 312 and the bottom plate 25, and then adjusting the mold height. Since the trigger mechanism 3 is provided with multiple groups, each trigger mechanism 3 can be adjusted individually during the production process, which facilitates production.

[0053] Reference Figure 3 The lower push rod 322 includes a connecting rod 3221 threadedly connected to the upper push rod 321 and a punch rod 3222 integrally coaxially arranged at one end of the connecting rod 3221 away from the upper push rod 321. The diameter of the punch rod 3222 is smaller than the diameter of the connecting rod 3221. The punch rod 3222 is slidably inserted into the inner side of the sleeve 314, and the punch rod 3222 and the sleeve 314 are circumferentially locked. In this embodiment, the punch rod 3222 and the sleeve 314 are connected by a key, and a key slot is provided on the sleeve 314. The key is fixed in the key slot by bolts. The side wall of the punch rod 3222 is vertically provided with a sliding groove for the key to slide, so that the punch rod 3222 and the sleeve 314 are circumferentially locked, and the punch rod 3222 and the sleeve 314 can slide axially. The pitch of the upper push rod 321 is consistent with the pitch of the mounting sleeve 311. When the sleeve 314 rotates, since the punch rod 3222 and the sleeve 314 are connected by a key, the sleeve 314 drives the punch rod 3222 to rotate. Since the connecting rod 3221 is threadedly connected to the upper punch rod 3222, the punch rod 3222 moves synchronously with the movement of the base 312 during the movement of the base 312. Since the pitch of the upper ejector rod 321 is consistent with the pitch of the mounting sleeve 311, the moving distance of the punch rod 3222 is consistent with the moving distance of the base 312, and the distance between the punch rod 3222 and the bottom surface of the base 312 is consistent, so that the demoulding of the product is more stable.

[0054] The implementation principle of a multi-station punching device in an embodiment of the present application is as follows: when it is necessary to demold the product, the driving member 4 drives the upper mold frame 2 to move from the second station to the first station, and the roller 3421 slides from the second abutting surface 3513 to the first abutting surface 3511 as the upper mold frame 2 moves, so that the second hinged section 342 rotates, and the second hinged section 342 drives the first hinged section 341 to rotate, and the first hinged section 341 moves toward the connecting plate 23, and the first hinged section 341 drives the upper ejector rod 321 to move along the axis of the first guide hole 3113 toward the fixing ring 31221, and the upper ejector rod 321 drives the lower ejector rod 322 to move toward the fixing ring 31221, and the lower ejector rod 322 punches the product out from the opening of the second guide hole 3114, thereby facilitating demolding.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-station punching device, comprising a frame (1), an upper mold frame (2), and a driving member (4) for driving the upper mold frame (2) to move up and down, wherein the upper mold frame (2) has a first station and a second station located below the first station after being driven by the driving member (4); characterized in that: The machine frame (1) further comprises a trigger mechanism (3), the trigger mechanism (3) comprising a trigger support (31) mounted on the upper mold frame (2), a punching rod (32) slidably mounted on the trigger support (31), an intermediate connecting rod (33) hinged at one end to the top end of the punching rod (32), a trigger connecting rod (34) hinged at the other end of the intermediate connecting rod (33), and an abutment block (35) mounted on the frame (1) and arranged corresponding to the trigger connecting rod (34); the trigger connecting rod (34) is hinged to the upper mold frame (2) and comprises a contact block (35) at the hinge. The first hinged section (341) is located on the side of the hinge and is hinged to the middle connecting rod (33), and the second hinged section (342) is located on the other side of the hinge and is used to abut against the abutment block (35); the abutment block (35) has a trigger surface (351) for the second hinged section (342) to abut against and drive the trigger connecting rod (34) to rotate; during the process of the upper mold frame (2) moving from the second station to the first station, the second hinged section (342) always abuts against the trigger surface (351) and drives the punching rod (32) to move downward; A mounting sleeve (311) mounted on the upper die frame (2), a base (312) mounted on the outside of the mounting sleeve (311) and threadedly connected to the mounting sleeve (311), and a tensioning assembly (313) connected to the top of the base (312) and used for tightening the base (312) on the upper die frame (2); the base (312) is rotatably mounted with a sleeve (314) vertically slidably connected to the inside of the mounting sleeve (311) and circumferentially locked with the mounting sleeve (311), and a driving assembly (315) for driving the sleeve (314) to rotate; the mounting sleeve (311) has a first guide hole (3113) for slidingly engaging the upper portion of the punching rod (32); the sleeve (314) has a second guide hole (3114) for slidingly engaging the lower portion of the punching rod (32); The tensioning assembly (313) comprises a fixing rod (3131) threadedly connected to the top of the base (312) and passing through the upper mold frame (2), a fixing cover (3132) rotatably sleeved on the peripheral side wall of the fixing rod (3131), and a first elastic member (3134) arranged between the base (312) and the fixing cover (3132); A second elastic member (3135) is also provided between the fixed cover (3132) and the upper mold frame (2), and the second elastic member (3135) is located on the inner side of the first elastic member (3134).

2. A multi-station punching device according to claim 1, characterized in that: A roller (3421) is rotatably provided at one end of the second hinged section (342) away from the first hinged section (341).

3. A multi-station punching device according to claim 1, characterized in that: The trigger surface (351) comprises a first abutting surface (3511), a second abutting surface (3513) located on the upper side of the first abutting surface (3511), and an inclined surface (3512) arranged between the first abutting surface (3511) and the second abutting surface (3513), wherein the inclined surface (3512) is gradually increased from one end close to the first abutting surface (3511) to one end close to the second abutting surface (3513).

4. A multi-station punching device according to claim 1, characterized in that: The driving assembly (315) comprises a worm wheel (3151) vertically slidably connected to the outside of the sleeve (314) and axially locked with the sleeve (314), and a worm (3152) rotatably disposed in the base (312) and drivingly connected to the worm wheel (3151).

5. The multi-station punching device according to claim 1, characterized in that: The knocking rod (32) comprises an upper ejector rod (321) and a lower ejector rod (322), wherein the lower ejector rod (322) is threadedly connected to the bottom of the upper ejector rod (321), and the lower ejector rod (322) is slidably connected to the inner side of the sleeve (314) and is circumferentially locked with the sleeve (314).

6. A multi-station punching device according to claim 5, characterized in that: The thread pitch of the upper push rod (321) is consistent with the thread pitch of the mounting sleeve (311).

7. The multi-station punching device according to claim 1, characterized in that: The upper mold frame (2) has an empty slot (2321) for the base (312) to slide.

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