Punching tool

Abstract

The utility model discloses a punching tool. The punching tool comprises an upper die frame, a lower die frame, a pushing positioning mechanism connected to the lower end of the upper die frame and a side punching mechanism connected to the upper end of the lower die frame and located below the pushing positioning mechanism. The side punching mechanism comprises a female die, a workpiece carrier block arranged on the outer ring of the female die and two sets of male die assemblies symmetrically distributed on the left side and the right side of the female die. A discharging cavity is further formed in the female die, and two female die punched holes distributed in a bilateral symmetry mode are formed in the side wall of the female die. The discharging cavity is communicated with the female die punched hole. Each male die assembly comprises a male die fixing block, a male die, a sliding groove block, a male die side pushing block, a reset pull rod and a side check block. And the pushing positioning mechanism comprises a workpiece pushing part positioned above the workpiece carrying block and a side pushing block pushing rod positioned above the male die side pushing block. The male dies in the two male die assemblies on the left side and the right side of the female die can be centered to punch towards the female die, and two punching holes are formed in the side wall of the workpiece. The blanking device is simple in structure and high in blanking efficiency.

Description

Technical Field

[0001] This utility model relates to the field of punching technology, and in particular to a punching tool. Background Technology

[0002] During the processing of a workpiece, a punching process is required to create pre-defined holes. When the workpiece is a rotating body with a hollow interior and a circular outer wall, and several holes need to be punched radially into its circular outer wall, existing punching fixtures often employ a top-down punching method. This involves a die extending horizontally, with the punch holes on the die pendant extending vertically, and a punch connected to an upper die holder. During operation, the workpiece is fitted onto the outer ring of the die, and the lower end of the punch, driven by the upper die holder, is aligned with the die hole and punched vertically downwards, creating punch holes on the arc-shaped outer wall of the workpiece.

[0003] To punch a pair of symmetrical punch holes on the side wall of a workpiece, the final result should look like this. Figure 1 The punched workpiece A shown is shown. Figure 1 It contains a pair of symmetrically distributed punching holes A1. Using existing punching fixtures and performing the above punching method, only one punching hole can be formed on the side wall of the workpiece after each punching operation. After each punching operation, the workpiece needs to be rotated circumferentially to align the next punching face on the outer wall of the workpiece with the lower end of the punch before performing the second punching operation. This results in relatively low punching efficiency. Utility Model Content

[0004] Technical problems to be solved

[0005] The purpose of this invention is to provide a punching fixture that solves the technical problem that when using existing punching fixtures to punch holes in the sidewalls of rotating workpieces, only one punching hole can be formed on the workpiece per punching operation. This invention has a simple structure and lower cost.

[0006] Technical solution

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A punching fixture includes an upper die set, a lower die set, a push-positioning mechanism connected to the lower end of the upper die set, and a side punching mechanism connected to the upper end of the lower die set and located below the push-positioning mechanism.

[0009] The side punching mechanism includes a die cavity, a workpiece carrier block disposed on the outer ring of the die cavity, and two sets of punch assemblies symmetrically distributed on the left and right sides of the die cavity.

[0010] The die cavity is also provided with a discharge chamber, and two die holes are symmetrically distributed on the side wall of the die cavity; the discharge chamber is connected to the die holes.

[0011] Each punch assembly includes a punch fixing block, a punch, a slide block, a punch side push block, a reset pull rod, and a side stop block; the punch is connected to the punch fixing block and extends towards the punching direction of the die; the slide block has a slide groove for the punch fixing block to slide laterally, and the punch fixing block is placed in the slide groove; the punch side push block is located between the side stop block and the punch fixing block, the punch fixing block has a first guide slope at one end facing the punch side push block, and the punch side push block has a second guide slope corresponding to the first guide slope at one end facing the punch fixing block; the lower end of the punch side push block is also connected to a longitudinally telescopic side push block spring; one end of the reset pull rod is fixedly connected to the punch fixing block.

[0012] The push-positioning mechanism includes a workpiece pressing component located above the workpiece carrier block and a side-push block pressing rod located above the punch side-push block; the upper end of the workpiece pressing component and the upper end of the side-push block pressing rod are both connected to the lower end of the upper mold frame; a side-push block pressing rod is provided above each punch side-push block.

[0013] Furthermore, a return spring for the push rod is also connected between the upper end of the workpiece push rod and the upper mold frame.

[0014] Furthermore, the workpiece carrier has a through-hole die sleeve hole, which is fitted onto the outer ring of the die; the workpiece carrier and the die are movably connected; and a carrier return spring is provided below the workpiece carrier.

[0015] Furthermore, a limiting component is also provided above the workpiece carrier to restrict the workpiece carrier from moving further upward.

[0016] Furthermore, the upper end of the workpiece carrier is provided with two parallel upward protruding ends; the limiting component consists of two parallel limiting pressure strips, the limiting pressure strips are located between the two protruding ends, and the die sleeve hole is located between the two limiting pressure strips; the limiting pressure strips extend laterally and are fixedly connected to the side stop block.

[0017] Furthermore, the push-positioning mechanism also includes a block pressing rod, the upper end of which is connected to the upper mold frame, and the lower end of which is located above the workpiece block.

[0018] Furthermore, the reset pull rod extends laterally, with one end of the reset pull rod passing through the side stop block and the punch side push block in sequence and then connecting to the punch fixing block; the other end of the reset pull rod is provided with a rear blocking part, and the side stop block is also provided with a front blocking part, and a pull rod reset spring is connected between the front blocking part and the rear blocking part.

[0019] Furthermore, the push-positioning mechanism also includes a guide pin connected to the lower end of the upper mold frame; the upper end of the workpiece carrier is also provided with a limiting slot; the limiting slot is located directly below the lower end of the guide pin; the number of limiting slots is the same as the number of guide pins.

[0020] Furthermore, the punch fixing block includes a punch pressing block and a punch fixing seat, the punch is placed between the punch pressing block and the punch fixing seat, and the punch pressing block and the punch fixing seat are detachably connected.

[0021] Beneficial effects

[0022] Compared with the prior art, the present invention provides a punching fixture, which has the following beneficial effects:

[0023] The punching fixture of this utility model includes two punches and two punch side push blocks; after the upper die frame is pressed down, the two punch side push blocks move down at the same time, and the two punches are aligned and punched laterally towards the die direction, which can punch two punching holes on the side wall of the workpiece at the same time, and the two punching holes are symmetrical. The punching fixture has a simple structure and high efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a workpiece that completes the punching operation of a pair of punching holes in a utility model.

[0025] Figure 2 This is an exploded view of the punching fixture in this utility model (excluding the upper mold frame).

[0026] Figure 3 This is a cross-sectional view of the punching fixture in use in this utility model.

[0027] Figure 4 This is a sectional view (including the lower die frame) of the side punching mechanism in this utility model.

[0028] Figure 5 This is a schematic diagram showing the structural distribution of the two sets of punch assemblies (excluding the side stop, reset pull rod, and side push block spring) in the side punching mechanism of this utility model.

[0029] Figure 6 This is a schematic diagram of the second punch assembly in the side punching mechanism of the present invention.

[0030] Figure 7 This is a schematic diagram of the punch assembly in the side punching mechanism of the present invention.

[0031] Figure 8 This is a schematic diagram of the structure of the punch side push block one in this invention.

[0032] Figure 9 This is a schematic diagram of the structure of the punch fixing block 1 in this invention.

[0033] In the picture:

[0034] 100-Upper mold frame, 101-Upper mounting block one, 102-Upper mounting block two, 200-Lower mold frame, 201-Lower mounting block, 300-Die, 301-Die punch one, 302-Die punch two, 303-Unloading cavity, 400-Punch one, 401-Punch pressure block one, 402-Punch fixing seat one, 403-Punch side push block one, 404-Side push block spring one, 405-Slide block one, 406-Side stop block one, 407-Spring limit plate one, 408-Reset pull rod one, 409-Pull rod reset spring one, 4012-Guide slope one, 4031-Upper part of side push block, 4032-Lower part of side push block, 4033-Through hole, 4034-Guide slope two;

[0035] 500-Punch II, 501-Punch Pressing Block II, 502-Punch Fixing Seat II, 503-Punch Side Push Block II, 504-Side Push Block Spring II, 505-Slide Block II, 506-Side Stop Block II, 507-Spring Limiting Plate II, 508-Reset Pull Rod II, 509-Pull Rod Reset Spring II;

[0036] 600-Workpiece top pressure rod, 601-Side push block top pressure rod, 602-Guide pin, 603-Carrier block top pressure rod, 604-Rod sleeve, 605-Top pressure rod buffer spring, 606-Top head, 607-Receiving cavity;

[0037] 700-Workpiece carrier block, 701-Limit rod, 702-Carrier block reset spring, 703-Limit pressure bar, 800-Workpiece. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] like Figure 2-8 As shown, this utility model provides a punching fixture, which includes an upper die holder 100, a lower die holder 200, a push-positioning mechanism connected to the lower end of the upper die holder 100, and a side punching mechanism connected to the upper end of the lower die holder 200 and located below the push-positioning mechanism.

[0040] The cross-sectional view of the side punch mechanism connected to the upper end of the lower die set 200 is shown in the figure below. Figure 4 As shown; a cross-sectional view of the punching fixture in its working state is shown below. Figure 3 As shown; in Figure 3In the middle, located above the side punching mechanism are the top pushing positioning mechanism and the upper mold frame 100.

[0041] like Figure 4 As shown, in this embodiment, the side punching mechanism includes a die 300, a workpiece carrier block 700 disposed on the outer ring of the die 300, and two sets of punch assemblies symmetrically distributed on the left and right sides of the die 300.

[0042] like Figure 2 , 4 As shown, a set of punch assemblies is provided on each of the left and right sides of the die 300. Figure 4 In the middle, the punch assembly located to the left of the die cavity 300 is punch assembly one (e.g. Figure 7 As shown), the punch assembly located to the right of the die 300 is punch assembly two (as shown). Figure 6 (As shown); and punch assembly one and punch assembly two have the same structure and dimensions, and are symmetrically distributed on both sides of die 300, as shown. Figure 4 , 5 As shown. Specifically, the cross-sectional view of punch assembly one is as follows. Figure 7 As shown, the cross-sectional view of punch assembly two is as follows. Figure 6 As shown.

[0043] The structure and operation of punch assembly one are explained using this example. The structure and operation of punch assembly two are the same as those of punch assembly one. Figure 7 The diagram shows a schematic of the punch assembly located on the left side of the die cavity 300, which includes a punch fixing block (such as...). Figure 9 (As shown), punch 400, slide block 405, punch side push block 403, reset pull rod 408, and side stop block 406; punch 400 is connected to punch fixing block 1 and extends toward die punch hole 301; slide block 405 is provided with a slide groove 1 for punch fixing block 1 to slide laterally (as shown). Figure 2 As shown), the punch fixing block is placed in the slide groove; as Figure 7-9 As shown, the punch side push block 403 is located between the side stop block 406 and the punch fixing block 403. The punch fixing block 403 has a guide slope 4012 at one end facing the punch side push block 403, and the punch side push block 403 has a guide slope 4034 corresponding to the guide slope 4012 at one end facing the punch fixing block 403. The lower end of the punch side push block 403 is also connected to a longitudinally telescopic side push block spring 404. One end of the reset pull rod 408 is fixedly connected to the punch fixing block 403.

[0044] like Figure 2As shown, in this embodiment, the punch fixing block is composed of a punch fixing seat 401 and a punch pressing block 402, and the punch fixing seat 401 and the punch pressing block 402 are detachably connected. The punch 400 is fixed between the punch fixing seat 401 and the punch pressing block 402. Simultaneously, the punch 400 extends laterally towards the die punching hole 301 provided on the side wall of the die 300, as shown... Figure 4 As shown. Accordingly, the second punch 500 extends laterally toward the direction of the second die punch 302 provided on the side wall of the die 300.

[0045] In this embodiment, the side punching mechanism includes a die cavity 300 and two sets of punch assemblies. The die cavity 300 also has a discharge cavity 303, and the side wall of the die cavity 300 has two symmetrically distributed die punch holes (die punch hole one 301 and die punch hole two 302, respectively). Figure 4 (As shown); the unloading cavity 303 is connected to both die holes. After the blanking operation, the scrap material will enter the unloading cavity 303.

[0046] Furthermore, the punches within each punch assembly are aligned with a die cavity for punching. For example... Figure 4 As shown, punch 400 extends laterally toward die hole 301, and punch 500 extends laterally toward die hole 302. Since punch 400 and punch 500 are symmetrically distributed on both sides of die 300, during operation, punch 400 and punch 500 will move horizontally to center for punching.

[0047] like Figure 7 The diagram shown is a cross-sectional view of the punch assembly. In this embodiment, guide ramp 4012 and guide ramp 4034 are in contact with each other. Figure 8 As shown, the punch side push block 403 comprises two parts: an upper part 4031 with a trapezoidal cross-section, and a lower part 4032 with a long strip cross-section. The upper part 4031 also has through holes 4033 extending through both ends, and the height of these through holes 4033 is greater than the thickness of the reset pull rod 408. Figure 7 As shown, when the reset pull rod 408 is inserted laterally into the through hole 4033, there is still a gap between the reset pull rod 408 and the side wall of the through hole 4033. That is, when the reset pull rod 408 is fixed vertically, the punch side push block 403 can move relative to the reset pull rod 408 in the vertical direction.

[0048] Similarly, as Figure 7As shown, in this embodiment, the reset pull rod 408 sequentially passes through the side stop block 406, the spring limiting plate 407, and the through hole 4033 before being fixedly connected to the punch fixing seat 401. Furthermore, the reset pull rod 408 can be slidably connected to the side stop block 406, the spring limiting plate 407, and the through hole 4033. Figure 8 As shown, a mounting hole 4011 is provided on the guide slope 4012. In this embodiment, the right end of the reset pull rod 408 is inserted into the mounting hole 4011 and fixedly connected to the punch fixing block. Thus, when the punch fixing block moves laterally along the slide groove, the reset pull rod 408 will be driven to move laterally synchronously. Furthermore, since the reset pull rod 408 passes laterally through the side stop block 406, and one end of the reset pull rod 408 is fixedly connected to the punch fixing block, the vertical movement of the reset pull rod 408 is restricted, which in turn also restricts the vertical displacement of the punch fixing block.

[0049] The left end of the reset lever 408 is located on the left side of the side stop block 406, and a limiting protrusion is provided on the left end. A lever reset spring 409 is provided between the limiting protrusion and the spring limiting plate 407. The lever reset spring 409 is sleeved on the outer ring of the reset lever 408. Figure 6 As shown. When the punch side push block 403 is pressed down by a downward force, the side push block spring 404 is compressed by the force, and at the same time, the punch side push block 403 will push the punch fixing block 1 to move towards the die 300. At this time, the pull rod return spring 409 is compressed by the force. After the punch fixing block 1 moves towards the die 300, the punch 400 can be aligned with the die punch hole 301 for punching.

[0050] When the downward force on the punch side push block 403 is removed, the side push block spring 404 returns to its original position and extends, the punch side push block 403 returns to its original position and moves upward, the return spring 409 returns to its original position and extends, and the return pull rod 408 returns to its original position and moves to the left under the action of the return spring 409, thereby driving the punch fixing block 1 to return to its original position and move away from the die 300, and the punch 400 exits the die punch hole 301.

[0051] In this embodiment, a workpiece carrier block 700 is also connected to the outer ring of the die 300 to support the workpiece 800. The structure of the workpiece carrier block 700 is as follows: Figure 2 As shown in the diagram, the workpiece carrier block 700 is movably connected to the die cavity 300, and four limiting rods 701 are connected to the lower end of the workpiece carrier block 700. Each limiting rod 701 has a carrier block return spring 702 fitted around its outer ring. The upper end of the carrier block return spring 702 is fixedly connected to the lower end of the workpiece carrier block 700, and the length of the limiting rod 701 is shorter than the length of the carrier block return spring 702. Since the carrier block return spring 702 is fitted around the outer ring of the limiting rod 701, and the limiting rod 701 is a longitudinally extending straight rod, it provides a certain limiting effect on the carrier block return spring 702.

[0052] When the workpiece carrier block 700 is pressed down, the limiting rod 701 moves down synchronously, and the carrier block return spring 702 contracts under force. When the downward pressure on the upper end of the carrier block return spring 702 disappears, the carrier block return spring 702 returns to its original position and extends, driving the workpiece carrier block 700 to return to its original position and move upward. In the above process, when the workpiece carrier block 700 moves down, it makes room for the space between punch 400 and die hole 301, as well as the space between punch 500 and die hole 302. This allows punch 400 and punch 500 to move towards the die 300 and punch into die hole 301 and die hole 302 respectively. At the same time, after punch 400 and punch 500 return to their original position, the workpiece carrier block 700 returns to its original position and moves upward, moving the workpiece 800 located at the upper end of the workpiece carrier block 700 back to its initial height. At this time, the workpiece carrier block 700 is also at its initial height.

[0053] like Figure 4 As shown in the figure, the workpiece carrier block 700 is in the initial height state. At the same time, in order to limit the upward movement height of the workpiece carrier block 700, this embodiment also adds a limiting component to restrict the workpiece carrier block from moving further upward, namely two parallel limiting pressure strips 703.

[0054] like Figure 2 , 4 As shown, the upper end of the workpiece carrier block 700 is provided with a through-hole die sleeve and two parallel upward-protruding ends; the upper end of the die 300 is inserted upward into the die sleeve, and two limiting pressure strips 703 are located between the two protruding ends, with the die sleeve located between the two limiting pressure strips 703; the limiting pressure strips 703 extend laterally, and both ends of the limiting pressure strips 703 are fixedly connected to the side stop block 406 and the side stop block 506, respectively. The limiting pressure strips 703 are connected above the workpiece carrier block 700, which can prevent the workpiece carrier block 700 from continuing to move upward under the action of the carrier block return spring 702, thereby limiting the movable height of the workpiece carrier block 700.

[0055] At the same time, the two limiting strips 703 extend laterally and are parallel to each other and spaced apart, such as Figure 3 As shown, the upper part of punch fixing block one and the upper part of punch fixing block two are both limited between the two limiting pressure strips 703.

[0056] In this punching fixture, during the punching operation, the punch moves laterally to perform side punching, rather than punching downwards towards the die. Furthermore, we simultaneously arrange two sets of punch assemblies with identical structure and dimensions on both symmetrical sides of a die. Through a push-positioning mechanism, punch side push block 403 and punch side push block 503 are simultaneously pressed down, causing punch 400 and punch 500 to be aligned and punched synchronously. This allows for the simultaneous punching of two symmetrical holes on the outer wall of the workpiece 800 in one operation, enabling rapid punching operations on rotating bodies.

[0057] The push-positioning mechanism in this embodiment includes a workpiece pressing component above the workpiece carrier block 700 and a side-push block pressing rod located above the punch side-push block. Specifically, a side-push block pressing rod 601 is connected above the first punch side-push block 403 and the second punch side-push block 503, respectively.

[0058] At the same time, such as Figure 3 As shown, in this embodiment, the workpiece pressing component includes a workpiece pressing rod 600, a pressing rod buffer spring 605, a rod sleeve 604 extending through both the upper and lower ends, and a top head 606 connected to the lower end of the workpiece pressing rod 600.

[0059] like Figure 2 , 3 As shown, the lower end of the workpiece pressing rod 600 is inserted into the rod sleeve 604 and is fastened to the rod sleeve 604 through the mandrel 606. Specifically, the mandrel 606 is threaded to the lower end of the workpiece pressing rod 600, and the outer wall of the mandrel 606 is threaded to the inner wall of the lower end of the rod sleeve 604. Meanwhile, the upper mold frame 100 and the upper mounting blocks (upper mounting block one 101 and upper mounting block two 102) are provided with a receiving cavity 607 for accommodating the top pressure rod buffer spring 605 and the upper part of the rod sleeve 604. The receiving cavity 607 is vertically continuous, with the upper part of the rod sleeve 604 placed in the receiving cavity 607, and the lower end of the rod sleeve 604 extending downward outside the receiving cavity 607. Above the rod sleeve 604 inside the receiving cavity 607 is the top pressure rod buffer spring 605, which is sleeved on the outer ring of the workpiece top pressure rod 600. The upper end of the rod sleeve 604 is provided with a transverse protrusion around its circumference to prevent the rod sleeve 604 from falling downward out of the receiving cavity 607. Figure 3 As shown, the lower end of the transverse protrusion is engaged with the upper end of the upper mounting block 101, while the lower end of the top pressure rod buffer spring 605 is positioned above the transverse protrusion, thus preventing the top pressure rod buffer spring 605 from falling downwards. Simultaneously, the workpiece top pressure rod 600 is movably connected to the upper through hole on the upper mold frame 100, and the rod sleeve 604 is movably connected to the upper mounting block 101. When the upper mold frame 100 is pressed down, the top head 606 contacts the upper end of the workpiece 800, and the top pressure rod buffer spring 605 contracts under pressure, achieving a certain buffering and force-relieving effect.

[0060] Of course, we can also use a solution of workpiece top pressure rod plus elastic component, that is, the upper end of the workpiece top pressure rod is connected to the elastic component, and the elastic component is connected to the lower end of the upper mold frame. The elastic component can also achieve the buffering and force relief function.

[0061] At the same time, such as Figure 2 , 3 As shown, we have also added four block pressing rods 603 to the push-positioning mechanism. The block pressing rods 603 are connected to the lower end of the upper mold frame 100 through the upper mounting block, and the lower end of the block pressing rods 603 is located above the workpiece block 700. During operation, the pressed-down block pressing rods 603 can be used to push the workpiece block 700 downward.

[0062] The operation steps of the punching fixture in this utility model are briefly as follows:

[0063] First, the workpiece 800 is located on the upper end of the workpiece carrier block 700, and the lower end of the workpiece 800 is located above the die 300. The pressure device drives the upper die frame 100 to press down, and the top head 606 presses down on the upper end of the workpiece 800 located on the workpiece carrier block 700 from top to bottom. The four carrier block pressing rods 603 press down on the upper end of the workpiece carrier block 700.

[0064] Then, the upper die holder 100 continues to press down. Under the push of the workpiece push rod 606, the workpiece 800 and the workpiece carrier block 700 are pressed downward. The workpiece 800 moves downward and its side wall is pressed against the outside of the die punch hole. At the same time, the punch side push block 1 403 and the punch side push block 2 503 move downward under the push of the push block push rod 601, which drives the punch fixing block 1 (composed of punch pressure block 1 401 and punch fixing seat 1 402) and the punch fixing block 2 (composed of punch pressure block 2 501 and punch fixing seat 2 502) to move in the center, thereby driving the punch 1 400 and the punch 2 500 to move laterally in the center and push. When the side wall of workpiece 800 is located between the die hole and the punch (i.e., the side wall of workpiece 800 is against the outside of the die hole), punch 400 and punch 500 are aligned and punched to create two symmetrical punching holes on the side wall of workpiece 800. The scrap material is cut off and falls into the unloading chamber 303.

[0065] Finally, the pressure device drives the upper die holder 100 to reset and move upward, and the components in the punching module reset and move. For example, the punch side push block resets and moves upward under the action of the corresponding side push block spring, the punch fixing block resets and moves under the action of the corresponding tie rod reset spring, and the workpiece carrier block 700 resets and moves upward under the action of the carrier block reset spring 702.

[0066] In this embodiment, as Figure 2-3As shown, a lower mounting block 201 is added above the upper end of the lower mold frame 200. The lower mounting block 201 is located below the slide block 405 and the slide block 505. At the same time, the lower ends of the side push block spring 404 and the side push block spring 504 pass downward through the lower mounting block 201 and are placed in the groove provided on the lower mold frame 200.

[0067] In this embodiment, the push-positioning mechanism also includes two guide pins 602 fixedly connected to the lower end of the upper mold frame 100 via an upper mounting block 101. A limiting hole corresponding to the guide pins 602 is provided on the upper end of the workpiece carrier block 700, with the guide pins 602 located directly above the limiting hole. During operation, the workpiece 800 is placed on the upper end of the workpiece carrier block 700, and the existing holes on the workpiece 800 are aligned with the limiting holes. When the guide pins 602 move down, they are sequentially inserted into the holes and limiting holes on the workpiece 800, preventing radial movement of the workpiece 800 and locking its position. In this embodiment, holes are already formed on the workpiece 800 before side punching. When the workpiece 800 is placed on the upper end of the workpiece carrier block 700 (e.g., ...), the holes are fixedly connected to the lower end of the upper mold frame 100 via an upper mounting block 101. Figure 3 As shown, the hole is through the top and bottom and can be aligned with the limiting insertion hole.

[0068] Using the punching fixture in this embodiment, the punch can be punched laterally on the side. During a single downward press of the upper die holder 100, two punching holes are simultaneously punched out, symmetrically distributed on the left and right side walls of the workpiece. This operation is convenient and efficient. Furthermore, after the upper die holder 100 resets and moves upward, the punch can automatically reset and move.

Claims

1. A punching fixture, characterized in that: It includes an upper mold frame, a lower mold frame, a push-positioning mechanism connected to the lower end of the upper mold frame, and a side punching mechanism connected to the upper end of the lower mold frame and located below the push-positioning mechanism; The side punching mechanism includes a die cavity, a workpiece carrier block disposed on the outer ring of the die cavity, and two sets of punch assemblies symmetrically distributed on the left and right sides of the die cavity. The die cavity is also provided with a discharge chamber, and two die holes are symmetrically distributed on the side wall of the die cavity; the discharge chamber is connected to the die holes. Each punch assembly includes a punch fixing block, a punch, a sliding block, a punch side push block, a reset pull rod, and a side stop block; the punch is connected to the punch fixing block and extends towards the punching direction of the die; the sliding block has a sliding groove for the punch fixing block to slide laterally, and the punch fixing block is placed in the sliding groove; the punch side push block is located between the side stop block and the punch fixing block, the punch fixing block has a first guide slope at one end facing the punch side push block, and the punch side push block has a second guide slope corresponding to the first guide slope at one end facing the punch fixing block; the lower end of the punch side push block is also connected to a longitudinally telescopic side push block spring; one end of the reset pull rod is fixedly connected to the punch fixing block; The push-positioning mechanism includes a workpiece pressing component located above the workpiece carrier block and a side-push block pressing rod located above the punch side-push block; the upper end of the workpiece pressing component and the upper end of the side-push block pressing rod are both connected to the lower end of the upper mold frame; a side-push block pressing rod is provided above each punch side-push block.

2. The punching fixture according to claim 1, characterized in that: A return spring for the top pressure rod is also connected between the upper end of the workpiece top pressure rod and the upper mold frame.

3. A punching fixture according to claim 2, characterized in that: The workpiece carrier has a through-hole for the die sleeve, which is fitted onto the outer ring of the die; the workpiece carrier and the die are movably connected; a carrier return spring is also provided below the workpiece carrier.

4. A punching fixture according to claim 3, characterized in that: A limiting component is also provided above the workpiece carrier to restrict the workpiece carrier from moving further upward.

5. A punching fixture according to claim 4, characterized in that: The upper end of the workpiece carrier is also provided with two parallel upward protruding ends; the limiting component is two parallel limiting pressure strips, the limiting pressure strips are located between the two protruding ends, and the die sleeve hole is located between the two limiting pressure strips; the limiting pressure strips extend laterally and are fixedly connected to the side stop block.

6. A punching fixture according to claim 5, characterized in that: The push-positioning mechanism also includes a block pressing rod, the upper end of which is connected to the upper mold frame, and the lower end of which is located above the workpiece block.

7. A punching fixture according to any one of claims 1-6, characterized in that: The reset pull rod extends laterally, with one end passing through the side stop block and the punch side push block in sequence and then connecting to the punch fixing block; the other end of the reset pull rod is provided with a rear blocking part, and the side stop block is also provided with a front blocking part, and a pull rod reset spring is connected between the front blocking part and the rear blocking part.

8. A punching fixture according to claim 7, characterized in that: The push-positioning mechanism also includes a guide pin connected to the lower end of the upper mold frame; the upper end of the workpiece carrier is also provided with a limiting slot; the limiting slot is located directly below the lower end of the guide pin; the number of limiting slots is the same as the number of guide pins.

9. A punching fixture according to claim 8, characterized in that: The punch fixing block includes a punch pressing block and a punch fixing seat. The punch is placed between the punch pressing block and the punch fixing seat, and the punch pressing block and the punch fixing seat are detachably connected.

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