A high-precision punching mechanism

Abstract

This invention provides a high-precision punching mechanism, including a tool clamping assembly and a tool changing mechanism. The tool clamping assembly includes an adjusting base, a connecting seat, a tool holder, a punching head, a drive block, a compression spring, an adjusting screw, and a locking screw. The tool changing mechanism includes a mounting plate, a tool holder, a rotating block, a rotation drive assembly, a lifting drive assembly, and a tool holder assembly. The compression spring corresponds to the mounting cavity, and its left and right ends are respectively fixed to the left ends of the adjusting base and the drive block. The adjusting screw is threaded to the right end of the adjusting base, and its left end corresponds to the mounting cavity and contacts the right end of the drive block. The locking screw is threaded to the adjusting base, and its inner end abuts against the outer end face of the tool holder. Its advantages are: after the tool wears out, it is not necessary to replace the entire tool; the extension length can be controlled by fine-tuning the punching head, thereby enabling continued use, reducing manufacturing costs, and facilitating daily calibration of the tool head.

Description

Technical Field

[0001] This invention relates to the field of flexible material punching technology, and in particular to a high-precision punching mechanism. Background Technology

[0002] In the actual production process of punching equipment for flexible materials, the punching tool is a core vulnerable component. When punching flexible materials continuously for a long time, the tool will inevitably experience continuous wear. As the wear of the punching tool gradually increases, the effective working length of the tool is continuously reduced, which directly leads to the punching depth of the flexible material being difficult to meet the requirements of the process standard. This results in quality defects such as insufficient hole diameter and poor processing consistency, which seriously affects the overall processing accuracy and yield of the product.

[0003] Currently, most punching equipment for flexible materials uses a fixed, one-piece punching tool that lacks an adjustable tool extension length, making it impossible to fine-tune and compensate for tool wear. When the tool wear reaches its critical limit, it must be completely disassembled and replaced with a brand new tool; simple adjustments are insufficient for continued use. This frequent tool replacement undoubtedly increases tool consumption and manufacturing costs. Therefore, it is necessary to develop a high-precision punching mechanism to address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision punching mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-precision punching mechanism includes a tool clamping assembly and a tool changing mechanism. The tool clamping assembly includes an adjusting base, a connecting seat, a tool holder, a punching head, a drive block, a compression spring, an adjusting screw, and a locking screw. The connecting seat is fixed above the adjusting base. The adjusting base has a mounting cavity and a sliding cavity. The sliding cavity vertically penetrates the adjusting base and its upper end communicates with the mounting cavity. The tool holder is slidably connected to the sliding cavity and can slide vertically. The upper end of the tool holder corresponds to the mounting cavity. The punching head is fixed to the lower end of the tool holder. The drive block corresponds to the mounting cavity. The upper end of the drive block is slidably connected to the adjusting base and can slide horizontally. The upper end of the tool holder... The device includes a first inclined surface and a second inclined surface at the lower end of the drive block. The first and second inclined surfaces are in contact. A compression spring is located within the mounting cavity, with its left and right ends fixed to the left ends of the adjusting base and the drive block, respectively. An adjusting screw is threaded to the right end of the adjusting base, with its left end corresponding to the mounting cavity and contacting the right end of the drive block. A locking screw is threaded to the adjusting base, with its inner end abutting against the outer end face of the tool holder. Two sets of locking screws are provided, corresponding to the left and right sides of the tool holder, respectively. The tool changing mechanism includes a mounting plate, a tool holder, a rotating block, a rotating drive assembly, a lifting drive assembly, and a tool holder assembly. The tool holder is fixed to the lower side of the mounting plate. The rotating block is rotatably mounted on the upper end of the tool holder. The power output end of the rotary drive assembly is connected to the rotating block, and the rotary drive assembly drives the rotating block to rotate. The lifting drive assembly is fixed on the upper side of the mounting plate. The tool holder assembly includes a connecting vertical rod and a tool changing component. The upper end of the connecting vertical rod is rotatably mounted on the power output end of the lifting drive assembly. The connecting vertical rod passes through the rotating block and the tool holder. The connecting vertical rod is slidably connected to the rotating block and can slide in the vertical direction. The tool changing component is fixed to the lower end of the connecting vertical rod and corresponds to the lower end of the connecting vertical rod. The tool changing component includes a tool changing seat, a ball-head plunger, and a locking boss. The tool changing seat has a downward-opening circular blind hole. The ball-head plunger is fixed to the tool changing seat. The upper elastic telescopic end corresponds to the circular blind hole. The fastening boss is fixed on the tool changer and corresponds to the circular blind hole. The fastening boss corresponds to the lower part of the ball plunger. The connecting seat corresponds to the circular blind hole. The connecting seat includes a circular base plate, a support column, a locking boss, an arc groove, and a clearance groove. The support column is fixed in the upper middle part of the circular base plate. The locking boss is fixed at the upper end of the support column and protrudes outward. There is a gap between the lower end of the locking boss and the circular base plate, forming an arc groove. The clearance groove vertically penetrates the locking boss and its lower end communicates with the arc groove. A positioning groove is provided on the outer side of the locking boss. The elastic telescopic end of the ball plunger corresponds to the positioning groove, and the fastening boss corresponds to the arc groove.

[0007] Further description of the invention: Both the first inclined plane and the second inclined plane slope downward to the right.

[0008] Further description of the present invention: A waste discharge cavity is vertically provided inside the tool holder, the upper end of the waste discharge cavity penetrates through the tool holder, and at least one set of columnar cutters is provided at the lower end of the punching cutter head. A waste discharge through hole is vertically provided in the middle of the columnar cutter, and the upper end of the waste discharge through hole communicates with the waste discharge cavity.

[0009] Further description of the present invention: The adjusting base is provided with a first fixing plate, a second fixing plate, a first fixing screw, and a second fixing screw. The first fixing plate and the second fixing plate are respectively corresponding to the left and right sides of the mounting cavity. The first fixing screw is threadedly connected to the adjusting base and its inner end contacts the first fixing plate. Multiple sets of the first fixing screw are provided and are respectively corresponding to the front and rear sides of the first fixing plate. The second fixing screw is threadedly connected to the adjusting base and its inner end contacts the second fixing plate. Multiple sets of the second fixing screw are provided and are respectively corresponding to the front and rear sides of the second fixing plate. The left end of the compression spring is fixed to the first fixing plate, and the adjusting screw is threadedly connected to the second fixing plate.

[0010] Further description of the present invention: an arc-shaped groove surrounds the outer periphery of the support column; two sets of clearance grooves are provided and correspond to the front and rear sides of the support column respectively; two sets of positioning grooves are provided and correspond to the left and right sides of the locking boss respectively; two sets of ball-head plungers and latching bosses are provided and correspond to the left and right sides of the tool changing component respectively.

[0011] Further description of the present invention: The locking boss is also provided with a sliding groove and a guide groove. The sliding groove is provided on the left and right sides of the positioning groove and is connected to the positioning groove. The sliding groove is horizontally arranged and one end near the clearance groove is connected to one end of the guide groove. The other end of the guide groove is connected to the clearance groove. The guide groove is inclined along the inner side of the support column towards the clearance groove.

[0012] Further description of the invention: It also includes a height correction fixture for correcting the tool clamping assembly. The height correction fixture includes a fixture base, a vertical guide rod, a clamping block, a return spring, a rotating handle, a drive protrusion, a height gauge, and a probe limiting assembly. The fixture base includes a placement base plate, a support plate, and a mounting top plate. The upper and lower ends of the support plate are respectively fixed to the rear ends of the mounting top plate and the placement base plate. The vertical guide rod corresponds to the front side of the support plate, and its upper and lower ends are respectively fixed to the mounting top plate and the placement base plate. The clamping block is slidably connected to the vertical guide rod and can slide in the vertical direction. The return spring is sleeved on the upper end of the vertical guide rod, and its upper and lower ends abut against the mounting top plate and the clamping block, respectively. The rotating handle is rotatably mounted on the support plate, and its front end protrudes beyond the front side of the support plate. The driving protrusion is horizontally positioned with one end fixed to the front end of the rotating handle. The upper end of the driving protrusion abuts against the clamping block, and the rear end of the driving protrusion abuts against the front end face of the supporting plate. The clamping block has a first U-shaped groove with a forward opening. The height gauge is fixed to the mounting top plate and has an elastic probe and a detection pressure plate at its lower end. The probe limiting assembly includes a limiting baffle and a limiting ring. The limiting baffle corresponds to the upper part of the first U-shaped groove and is fixed to the clamping block at both ends. The limiting baffle has a second U-shaped groove with a forward opening, which corresponds to the upper part of the first U-shaped groove. The lower end of the elastic probe passes through the second U-shaped groove and corresponds to the inside of the first U-shaped groove. The detection pressure plate is fixed to the lower end of the elastic probe. The limiting ring is fixed to the elastic probe by screws and corresponds to the upper part of the limiting baffle.

[0013] Further description of the invention: The height correction fixture also includes a limiting stud, the upper end of which is threadedly connected to the mounting top plate, and the lower end face of which corresponds to the upper part of the clamping block.

[0014] Further description of the invention: Two sets of vertical guide rods are provided, respectively corresponding to the left and right sides of the supporting plate.

[0015] Further description of the invention: The rotating handle includes a roller and a rocker arm. The rocker arm is rotatably mounted on the support plate. Two sets of rocker arms are provided and correspond to the left and right sides of the support plate, respectively. Two sets of driving protrusions are provided and are rotatably mounted on the inner front end of the two sets of rocker arms, respectively. The left and right ends of the roller are rotatably mounted on the rear end of the two sets of rocker arms, respectively.

[0016] The beneficial effects of this invention are as follows: The connecting seat is used to fix the tool holder assembly. During punching operations, the locking screw is tightened to firmly fix the tool holder to the adjusting base. When the punching head is worn or needs calibration, and the extension length of the punching head needs to be fine-tuned, the connecting seat is first removed from the tool holder, then the entire punching tool is inverted. Next, the locking screw is loosened with a screwdriver, allowing the tool holder to slide within the sliding cavity. Then, the adjusting screw is rotated, causing the inner end of the adjusting screw to move horizontally. This, combined with the compression spring, causes the drive block to move horizontally. Through the cooperation of the first and second inclined surfaces, the tool holder is vertically raised and lowered within the sliding cavity, thereby fine-tuning the extension length of the punching head. Finally, the locking screw is tightened again. The advantage of this design is that after the tool wears out, there is no need to replace the entire tool. The extension length can be controlled by fine-tuning the punching head, allowing it to continue to be used. This reduces tool consumables and manufacturing costs, and also facilitates daily calibration of the tool head. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural view of the tool clamping assembly in this invention;

[0018] Figure 2 This is a front view of the tool clamping assembly in this invention;

[0019] Figure 3 This is a front sectional view of the tool clamping assembly in this invention;

[0020] Figure 4 This is a front sectional view of the tool holder and the punching head in this invention;

[0021] Figure 5 This is a structural diagram of the connector in this invention;

[0022] Figure 6 This is a structural diagram of the tool changing mechanism in this invention;

[0023] Figure 7 This is a structural diagram of the tool changing component in this invention;

[0024] Figure 8 This is an assembly structure diagram of the tool changing component and the tool clamping assembly in this invention (with the tool changing component in cross section).

[0025] Figure 9 This is a three-dimensional structural view of the height correction fixture in this invention;

[0026] Figure 10 This is a front view of the height correction fixture in this invention;

[0027] Figure 11 This is a right view of the structure of the height correction fixture in this invention;

[0028] Figure 12 This is a structural diagram of the combined height correction fixture and tool clamping assembly in this invention;

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Tool clamping assembly; 11. Adjusting base; 111. Mounting cavity; 112. Sliding cavity; 113. First fixing plate; 114. Second fixing plate; 115. First fixing screw; 116. Second fixing screw; 12. Connecting seat; 121. Circular base plate; 122. Support column; 123. Locking boss; 1231. Positioning groove; 1232. Sliding groove; 1233. Guide groove; 124. Arc groove; 125. Clearance groove; 13. Tool holder; 131. First inclined surface; 132. Waste discharge cavity; 14. Punching head; 141. Columnar cutter; 1411. Waste discharge through hole; 15. Drive block; 151. Second inclined surface; 16. Compression spring; 17. Adjusting screw; 18. Locking screw; 2. Tool changing mechanism; 21. Mounting upright plate; 22. 23. Tool holder; 24. Rotary block; 25. Rotary drive assembly; 26. Lifting drive assembly; 27. Tool holder assembly; 28. Connecting vertical rod; 29. ​​Tool changing component; 20. Tool changing seat; 21. Circular blind hole; 20. Ball plunger; 21. Snap-fit ​​boss; 30. Height correction fixture; 31. Fixture seat; 32. Placement base plate; 33. Support plate; 34. Mounting top plate; 35. Vertical guide rod; 36. Clamping block; 37. First U-shaped groove; 38. Return spring; 39. Rotating handle; 30. Roller; 31. Swing rod; 32. Drive protrusion; 33. Altimeter; 34. Elastic probe; 35. Detection pressure plate; 36. Probe limiting assembly; 37. Limiting baffle; 38. Limiting retaining ring; 39. Limiting stud. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings:

[0032] like Figures 1 to 12As shown, a high-precision punching mechanism includes a tool clamping assembly 1 and a tool changing mechanism 2. The tool clamping assembly 1 includes an adjusting base 11, a connecting seat 12, a tool holder 13, a punching head 14, a driving block 15, a compression spring 16, an adjusting screw 17, and a locking screw 18. The connecting seat 12 is fixed above the adjusting base 11. The adjusting base 11 has a mounting cavity 111 and a sliding cavity 112. The sliding cavity 112 vertically penetrates the adjusting base 11 and its upper end communicates with the mounting cavity 111. The tool holder 13 is slidably connected to the sliding cavity 112 and can slide vertically. The upper end of the tool holder 13 corresponds to the mounting cavity 111. The punching head 14 is fixed to the lower end of the tool holder 13. The driving block 15 corresponds to the mounting cavity 111. Inside cavity 111, the upper end of drive block 15 is slidably connected to adjustment base 11 and can slide horizontally. The upper end of tool holder 13 is provided with a first inclined surface 131, and the lower end of drive block 15 is provided with a second inclined surface 151. The first inclined surface 131 contacts the second inclined surface 151. Compression spring 16 corresponds to the mounting cavity 111, and its left and right ends are respectively fixed to the left ends of adjustment base 11 and drive block 15. Adjustment screw 17 is threadedly connected to the right end of adjustment base 11, and its left end corresponds to the mounting cavity 111 and contacts the right end of drive block 15. Locking screw 18 is threadedly connected to adjustment base 11, and its inner end abuts against the outer end face of tool holder 13. Two sets of locking screws 18 are provided. Corresponding to the left and right sides of the tool holder 13, the tool changing mechanism 2 includes a mounting plate 21, a tool holder 22, a rotating block 23, a rotary drive assembly 24, a lifting drive assembly 25, and a tool holder assembly 26. The tool holder 22 is fixed to the lower side of the mounting plate 21. The rotating block 23 is rotatably mounted on the upper end of the tool holder 22. The power output end of the rotary drive assembly 24 is connected to the rotating block 23, and the rotary drive assembly 24 drives the rotating block 23 to rotate. The lifting drive assembly 25 is fixed to the upper side of the mounting plate 21. The tool holder assembly 26 includes a connecting vertical rod 261 and a tool changing component 262. The upper end of the connecting vertical rod 261 is rotatably mounted on the power output end of the lifting drive assembly 25. The connecting vertical rod 261 passes through the rotating block 23 and the tool holder. The base 22 is slidably connected to the vertical rod 261 and the rotating block 23 and can slide vertically. The tool changing component 262 is fixed to the lower end of the vertical rod 261 and corresponds to the lower end of the vertical rod 261. The tool changing component 262 includes a tool changing seat 2621, a ball-head plunger 2622, and a fastening boss 2623. The tool changing seat 2621 has a downward-opening circular blind hole 26211. The ball-head plunger 2622 is fixed on the tool changing seat 2621 and its elastic extension end corresponds to the circular blind hole 26211. The fastening boss 2623 is fixed on the tool changing seat 2621 and corresponds to the circular blind hole 26211. The fastening boss 2623 is located below the ball-head plunger 2622. The connecting seat 12 corresponds to the circular blind hole 26211.The connecting seat 12 includes a circular base plate 121, a support column 122, a locking boss 123, an arc-shaped groove 124, and a clearance groove 125. The support column 122 is fixed to the upper center of the circular base plate 121. The locking boss 123 is fixed to the upper end of the support column 122 and protrudes outward. There is a gap between the lower end of the locking boss 123 and the circular base plate 121, forming an arc-shaped groove 124. The clearance groove 125 vertically penetrates the locking boss 123 and its lower end communicates with the arc-shaped groove 124. A positioning groove 1231 is provided on the outer side of the locking boss 123. The elastic extension end of the ball-head plunger 2622 corresponds to the positioning groove 1231, and the locking boss 2623 corresponds to the arc-shaped groove 124.

[0033] The connecting seat 12 is used to fix the tool holder assembly 26 of the tool changing mechanism 2. During punching operation, the locking screw 18 is tightened and the tool holder 13 is firmly fixed on the adjusting base 11. When the punching head is worn or needs to be checked, the extension length of the punching head needs to be finely adjusted. First, the connecting seat 12 is removed from the tool holder, and then the entire punching tool is turned upside down. Then, the locking screw 18 is loosened with a screwdriver so that the tool holder 13 can slide in the sliding cavity 112. Then, the adjusting screw 17 is rotated so that the inner end of the adjusting screw 17 moves horizontally. With the cooperation of the compression spring 16, the driving block 15 moves horizontally. Through the cooperation of the first inclined surface 131 and the second inclined surface 151, the tool holder 13 is raised and lowered vertically on the sliding cavity 112, thereby finely adjusting the extension length of the punching head 14. Finally, the locking screw 18 is tightened again. The advantage of this design is that after the tool wears out, there is no need to replace the entire tool. The extension length can be controlled by fine-tuning the punch head 14, thus enabling continued use, reducing tool consumables and manufacturing costs, and facilitating daily calibration of the tool head.

[0034] During tool changing, the lifting drive assembly 25 drives the tool holder assembly 26 to move downward, causing the connecting seat 12 of the tool clamping assembly 1 to extend into the circular blind hole 26211 of the tool changer 2621. The locking boss 2623 passes through the clearance groove 125 and enters the arc groove 124. Subsequently, the rotation drive assembly 24 drives the rotating block 23 to rotate the connecting vertical rod 261 and the tool changing component 262. The locking boss 2623 moves circumferentially within the arc groove 124. The ball plunger 2622 is pressed against the side of the locking boss 123 and retracts, finally locking into the positioning groove 1231, completing the automatic locking and positioning of the tool without the need for screw fastening. During disassembly, the rotation drive assembly 24 rotates in the opposite direction, the ball plunger 2622 exits the positioning groove 1231, the locking boss 2623 rotates to the position of the clearance groove 125, the lifting drive assembly 25 moves upward, and the tool changing component 262 separates from the tool clamping assembly 1. It enables rapid tool release and removal, with the entire process fully automated, eliminating the need for manual screw removal and installation. Multiple tool clamping assemblies are provided on the equipment, allowing for quick replacement of tools of different specifications to rapidly punch holes of various sizes into the workpiece.

[0035] Mounting plate 21 provides fixed support for the overall mechanism. During the punching operation, the lifting mechanism on the equipment drives the mounting plate 21 to rise and fall, thereby driving the cutter to rise and fall to punch holes.

[0036] Both the first inclined plane 131 and the second inclined plane 151 slope downward to the right.

[0037] When the adjusting screw 17 moves inward into the adjusting base 11, the drive block 15 further compresses the compression spring 16 and presses the first inclined surface 131 through the second inclined surface 151, causing the tool holder 13 and the punching head 14 to extend outward. Alternatively, the first inclined surface 131 and the second inclined surface 151 can both be set to tilt upward to the right, so that when the adjusting screw 17 moves outward from the adjusting base 11, the tool holder 13 and the punching head 14 will extend outward.

[0038] The tool holder 13 is vertically provided with a waste discharge cavity 132, the upper end of which penetrates the tool holder 13. The lower end of the punching head 14 is provided with at least one set of columnar cutters 141, and the middle of the columnar cutter is vertically provided with a waste discharge through hole 1411, the upper end of which is connected to the waste discharge cavity 132.

[0039] During the punching operation, the waste material after punching enters the waste discharge through hole 1411 and gradually accumulates and is compressed, eventually entering the waste discharge cavity 132 for temporary storage. After a specific production cycle, the waste material in the waste discharge cavity 132 is cleaned. During cleaning, the locking screw 18 is loosened, and the tool holder 13 and the punching cutter head 14 are removed to clean the waste material.

[0040] The adjusting base 11 is provided with a first fixing plate 113, a second fixing plate 114, a first fixing screw 115, and a second fixing screw 116. The first fixing plate 113 and the second fixing plate 114 correspond to the left and right sides of the mounting cavity 111, respectively. The first fixing screw 115 is threaded to the adjusting base 11 and its inner end contacts the first fixing plate 113. Multiple sets of the first fixing screw 115 are provided and correspond to the front and rear sides of the first fixing plate 113, respectively. The second fixing screw 116 is threaded to the adjusting base 11 and its inner end contacts the second fixing plate 114. Multiple sets of the second fixing screw 116 are provided and correspond to the front and rear sides of the second fixing plate 114, respectively. The left end of the compression spring 16 is fixed to the first fixing plate 113, and the adjusting screw 17 is threaded to the second fixing plate 114.

[0041] The first fixing plate 113 is fixed to the adjusting base 11 by the first fixing screw 115, and the second fixing plate 114 is fixed to the adjusting base 11 by the second fixing screw 116, which facilitates the disassembly and installation of the drive block 15 and the compression spring 16 in the mounting cavity 111.

[0042] The arc-shaped groove 124 surrounds the outer periphery of the support column 122. Two sets of clearance grooves 125 are provided and correspond to the front and rear sides of the support column 122 respectively. Two sets of positioning grooves 1231 are provided and correspond to the left and right sides of the locking boss 123 respectively. Two sets of ball-head plunger 2622 and latching boss 2623 are provided and correspond to the left and right sides of the tool changing component 262 respectively.

[0043] The surrounding arc groove 124 provides a circumferential sliding track for the locking boss 2623, ensuring smooth rotation and locking; the two sets of symmetrical clearance grooves 125 at the front and rear facilitate the quick entry or exit of the locking boss 2623 into or out of the arc groove 124; the symmetrical positioning grooves 1231 on the left and right cooperate with the ball plunger 2622 to achieve bidirectional positioning after the tool is clamped, improving clamping stability; the two sets of ball plungers 2622 and the locking boss 2623 are symmetrically arranged, and the force is evenly distributed to avoid tool deflection.

[0044] The locking boss 123 is also provided with a sliding groove 1232 and a guide groove 1233. The sliding groove 1232 is provided on the left and right sides of the positioning groove 1231 and is connected to the positioning groove 1231. The sliding groove is horizontally arranged and one end near the clearance groove 125 is connected to one end of the guide groove 1233. The other end of the guide groove 1233 is connected to the clearance groove 125. The guide groove 1233 is inclined along the inner side of the support column 122 towards the clearance groove 125.

[0045] During tool changing rotation, the ball plunger 2622 can move smoothly along the sliding groove 1232, disengaging from or entering the positioning groove 1231; the inclined guide groove 1233 plays a guiding transition role, allowing the ball plunger 2622 to enter the sliding groove 1232 and positioning groove 1231 more smoothly from the clearance groove 125 area, reducing jamming, improving the smoothness of tool changing action, and ensuring that the locking and unlocking process is accurate and reliable.

[0046] This design also includes a height correction fixture 3 for correcting the tool clamping assembly 1. The height correction fixture 3 includes a fixture base 31, a vertical guide rod 32, a clamping block 33, a return spring 34, a rotating handle 35, a drive protrusion 36, a height gauge 37, and a probe limiting assembly 38. The fixture base 31 includes a base plate 311, a support plate 312, and a mounting top plate 313. The upper and lower ends of the support plate 312 are respectively fixed to the rear end of the mounting top plate 313 and the rear end of the base plate 311. The vertical guide rod 32 corresponds to the front side of the support plate 312, and its upper and lower ends are fixed to the mounting top plate 313 and the placement bottom plate 311, respectively. The clamping block 33 is slidably connected to the vertical guide rod 32 and can slide in the vertical direction. The return spring 34 is sleeved on the upper end of the vertical guide rod 32, and its upper and lower ends abut against the mounting top plate 313 and the clamping block 33, respectively. The rotating handle 35 is rotatably mounted on the support plate 312, and its front end protrudes from the front side of the support plate 312, driving the convex... The column 36 is horizontally positioned and one end is fixed to the front end of the rotating handle 35. The upper end of the driving protrusion 36 abuts against the clamping block 33, and the rear end of the driving protrusion 36 abuts against the front end face of the supporting upright plate 312. The clamping block 33 is provided with a first U-shaped groove 331 that opens forward. The height gauge 37 is fixed on the mounting top plate 313 and has an elastic probe 371 and a detection pressure plate 372 at its lower end. The probe limiting assembly 38 includes a limiting baffle 381 and a limiting retaining ring 382. The limiting baffle 381 corresponds to... The first U-shaped groove 331 is fixed above the left and right ends of the clamping block 33. The limiting baffle 381 is provided with a second U-shaped groove that opens forward. The second U-shaped groove corresponds to the upper part of the first U-shaped groove 331. The lower end of the elastic probe 371 passes through the second U-shaped groove and corresponds to the inside of the first U-shaped groove 331. The detection pressure plate 372 is fixed to the lower end of the elastic probe 371. The limiting ring 382 is fixed to the elastic probe 371 by screws. The limiting ring 382 corresponds to the upper part of the limiting baffle 381.

[0047] When the calibration fixture is not in use, the return spring 34 pushes the clamping block 33 down under the action of elastic force. The clamping block 33 presses down on the driving protrusion 36, causing the rotating handle 35 to rotate until the driving protrusion 36 contacts the support plate 312. Before the tool needs to be calibrated, the mounting height of the height gauge 37 on the mounting top plate 313 is adjusted according to the required tool height, thereby adjusting the height position of the elastic probe 371 and setting it to the zero position. During calibration, the rear end of the rotating handle 35 is pressed down, causing the driving protrusion 36 to push the clamping block 33 upward. After the limiting baffle 381 contacts the limiting ring 382, ​​it also pushes the limiting ring 382 upward a certain distance, providing space for the subsequent insertion of the tool. Next, invert the tool clamping assembly 1, place the adjusting base 11 on the placement base plate 311 and push it backward so that the punching head corresponds to the first U-shaped groove 331. Release the rotating handle 35, and under the action of the return spring 34, the clamping block 33 presses the upper end face of the clamping base. At this time, the detection plate 372 contacts the upper end of the punching head. Manually adjust the height of the punching head and observe the reading on the height gauge 37 in real time, and compare it with the zero point position reading until the required height is reached. Then, fix the punching head on the clamping base, and then open the clamping block 33 and take out the tool clamping assembly 1. This design can quickly fix the clamping base and display the height data of the punching head in real time during the adjustment process, thereby avoiding repeated manual measurement of the cutting head height and improving the efficiency of tool calibration.

[0048] The height correction fixture 3 also includes a limiting stud 39, the upper end of which is threadedly connected to the mounting top plate 313, and the lower end face of the limiting stud 39 corresponds to the upper part of the clamping block 33.

[0049] The height of the lower end of the limiting stud 39 can be adjusted by rotating it, which limits the maximum upward stroke of the clamping block 33 and prevents the elastic probe 371 from being damaged due to excessive upward distance when driving the clamping block 33 to rise.

[0050] Two sets of vertical guide rods 32 are provided, corresponding to the left and right sides of the supporting plate 312 respectively.

[0051] Two sets of vertical guide rods 32 are symmetrically distributed to provide stable guidance for the clamping block 33, ensuring that the clamping block 33 does not wobble left or right when sliding up and down, and ensuring uniform contact between the detection pressure plate 372 and the tip of the tool, thereby improving the height detection accuracy. At the same time, the two sets of vertical guide rods 32 can also serve as a limiting structure for the clamping base. When the rear end face of the clamping base contacts the two sets of vertical guide rods 32, the tool tip is exactly aligned with the first U-shaped groove 331, avoiding collision between the tool tip and the inner wall of the first U-shaped groove 331.

[0052] The rotating handle 35 includes a roller 351 and a rocker arm 352. The rocker arm 352 is rotatably mounted on the support plate 312. Two sets of rocker arms 352 are provided and correspond to the left and right sides of the support plate 312 respectively. Two sets of driving protrusions 36 are provided and are rotatably mounted on the inner front end of the two sets of rocker arms 352 respectively. The left and right ends of the roller 351 are rotatably mounted on the rear end of the two sets of rocker arms 352 respectively.

[0053] By pressing down or lifting the roller 351, the two sets of swing rods 352 rotate synchronously, driving the protrusion 36 to push or release the clamping block 33 as the swing rods 352 rotate. The operation is labor-saving and the force is evenly distributed, and the clamping and resetting actions can be completed with one hand.

[0054] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the technical scope of the present invention.

Claims

1. A high-precision punching mechanism, characterized in that: The device includes a tool clamping assembly and a tool changing mechanism. The tool clamping assembly includes an adjusting base, a connecting seat, a tool holder, a punching head, a drive block, a compression spring, an adjusting screw, and a locking screw. The connecting seat is fixed above the adjusting base. The adjusting base has a mounting cavity and a sliding cavity. The sliding cavity vertically penetrates the adjusting base and its upper end communicates with the mounting cavity. The tool holder is slidably connected to the sliding cavity and can slide vertically. The upper end of the tool holder corresponds to the mounting cavity. The punching head is fixed to the lower end of the tool holder. The drive block corresponds to the mounting cavity. The upper end of the drive block is slidably connected to the adjusting base and can slide horizontally. The upper end of the tool holder has a first inclined... The lower end of the drive block is provided with a second inclined surface, and the first inclined surface contacts the second inclined surface. The compression spring corresponds to the mounting cavity. The left and right ends of the compression spring are respectively fixed to the adjusting base and the left end of the drive block. The adjusting screw is threaded to the right end of the adjusting base. The left end of the adjusting screw corresponds to the mounting cavity and contacts the right end of the drive block. The locking screw is threaded to the adjusting base and its inner end abuts against the outer end face of the tool holder. Two sets of locking screws are provided and correspond to the left and right sides of the tool holder respectively. The tool changing mechanism includes a mounting plate, a tool holder, a rotating block, a rotating drive assembly, a lifting drive assembly, and a tool holder assembly. The tool holder is fixed to the mounting plate. On the lower side of the plate, the rotating block is rotatably mounted on the upper end of the tool holder seat. The power output end of the rotary drive assembly is connected to the rotating block, and the rotary drive assembly drives the rotating block to rotate. The lifting drive assembly is fixed on the upper side of the mounting plate. The tool holder assembly includes a connecting vertical rod and a tool changing component. The upper end of the connecting vertical rod is rotatably mounted on the power output end of the lifting drive assembly. The connecting vertical rod passes through the rotating block and the tool holder seat. The connecting vertical rod is slidably connected to the rotating block and can slide in the vertical direction. The tool changing component is fixed to the lower end of the connecting vertical rod and corresponds to the lower end of the connecting vertical rod. The tool changing component includes a tool changing seat, a ball-head plunger, and a locking boss. The tool changing seat has an opening. A downward-facing circular blind hole is provided. The ball-head plunger is fixed to the tool changer and its elastic telescopic end corresponds to the inside of the circular blind hole. The fastening boss is fixed to the tool changer and corresponds to the inside of the circular blind hole. The fastening boss is located below the ball-head plunger. The connecting seat is located inside the circular blind hole. The connecting seat includes a circular base plate, a support column, a locking boss, an arc-shaped groove, and a clearance groove. The support column is fixed to the upper center of the circular base plate. The locking boss is fixed to the upper end of the support column and protrudes outward. There is a gap between the lower end of the locking boss and the circular base plate, forming the arc-shaped groove. The clearance groove vertically penetrates the locking boss and its lower end communicates with the arc-shaped groove. A positioning groove is provided on the outer side of the locking boss.The elastic telescopic end of the ball-head plunger corresponds to the positioning groove, and the snap-fit ​​boss corresponds to the arc-shaped groove.

2. The high-precision punching mechanism according to claim 1, characterized in that: Both the first and second inclined planes slope downwards to the right.

3. The high-precision punching mechanism according to claim 1, characterized in that: The tool holder is vertically provided with a waste discharge cavity, the upper end of which penetrates the tool holder. The lower end of the punching head is provided with at least one set of columnar cutting blades. The middle part of the columnar cutting blades is provided with a waste discharge through hole, the upper end of which communicates with the waste discharge cavity.

4. The high-precision punching mechanism according to claim 1, characterized in that: The adjusting base is provided with a first fixing plate, a second fixing plate, a first fixing screw, and a second fixing screw. The first fixing plate and the second fixing plate are respectively corresponding to the left and right sides of the mounting cavity. The first fixing screw is threaded to the adjusting base and its inner end contacts the first fixing plate. Multiple sets of the first fixing screw are provided and are respectively corresponding to the front and rear sides of the first fixing plate. The second fixing screw is threaded to the adjusting base and its inner end contacts the second fixing plate. Multiple sets of the second fixing screw are provided and are respectively corresponding to the front and rear sides of the second fixing plate. The left end of the compression spring is fixed to the first fixing plate, and the adjusting screw is threaded to the second fixing plate.

5. A high-precision punching mechanism according to claim 1, characterized in that: The arc-shaped groove surrounds the outer periphery of the support column. Two sets of clearance grooves are provided, corresponding to the front and rear sides of the support column respectively. Two sets of positioning grooves are provided, corresponding to the left and right sides of the locking boss respectively. Two sets of ball-head plungers and latching bosses are provided, corresponding to the left and right sides of the tool changing component respectively.

6. A high-precision punching mechanism according to claim 5, characterized in that: The locking boss is also provided with a sliding groove and a guide groove. The sliding groove is located on the left and right sides of the positioning groove and is connected to the positioning groove. The sliding groove is horizontally arranged and one end near the clearance groove is connected to one end of the guide groove. The other end of the guide groove is connected to the clearance groove. The guide groove is inclined along the inner side of the support column towards the clearance groove.

7. A high-precision punching mechanism according to claim 1, characterized in that: It also includes a height correction fixture for correcting the tool clamping assembly. The height correction fixture includes a fixture base, a vertical guide rod, a clamping block, a return spring, a rotating handle, a drive protrusion, a height gauge, and a probe limiting assembly. The fixture base includes a base plate, a support plate, and a mounting top plate. The upper and lower ends of the support plate are respectively fixed to the rear ends of the mounting top plate and the base plate. The vertical guide rod corresponds to the front side of the support plate, and its upper and lower ends are respectively fixed to the mounting top plate and the base plate. The clamping block is slidably connected to the vertical guide rod and can slide vertically. The return spring is sleeved on the upper end of the vertical guide rod, and its upper and lower ends abut against the mounting top plate and the clamping block, respectively. The rotating handle is rotatably mounted on the support plate, and its front end protrudes from the front side of the support plate. The drive protrusion is horizontal. The drive protrusion is positioned with one end fixed to the front end of the rotating handle. The upper end of the drive protrusion abuts against the clamping block, and the rear end of the drive protrusion abuts against the front end face of the support plate. The clamping block has a first U-shaped groove with a forward opening. The altimeter is fixed to the mounting top plate and has an elastic probe and a detection pressure plate at its lower end. The probe limiting assembly includes a limiting baffle and a limiting ring. The limiting baffle corresponds to the upper part of the first U-shaped groove and is fixed to the clamping block at both ends. The limiting baffle has a second U-shaped groove with a forward opening, which corresponds to the upper part of the first U-shaped groove. The lower end of the elastic probe passes through the second U-shaped groove and corresponds to the inside of the first U-shaped groove. The detection pressure plate is fixed to the lower end of the elastic probe. The limiting ring is fixed to the elastic probe by screws and corresponds to the upper part of the limiting baffle.

8. A high-precision punching mechanism according to claim 7, characterized in that: The height correction fixture also includes a limiting stud, the upper end of which is threadedly connected to the mounting top plate, and the lower end face of which corresponds to the upper part of the clamping block.

9. A high-precision punching mechanism according to claim 7, characterized in that: Two sets of vertical guide rods are provided, corresponding to the left and right sides of the supporting plate, respectively.

10. A high-precision punching mechanism according to claim 7, characterized in that: The rotating handle includes rollers and rocker arms. The rocker arms are rotatably mounted on the support plate. Two sets of rocker arms are provided and correspond to the left and right sides of the support plate, respectively. Two sets of driving protrusions are provided and are rotatably mounted on the inner front end of the two sets of rocker arms, respectively. The left and right ends of the rollers are rotatably mounted on the rear end of the two sets of rocker arms, respectively.

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