CN116786689A - Stamping die head and stamping die frame thereof - Google Patents

Abstract

The invention discloses a stamping die head and a stamping mold frame, and relates to the technical field of stamping equipment. It includes: a rotating shaft fixedly connected to the center of the turntable, and the rotating shaft is rotationally connected to the mounting plate; the rotating sleeve is rotationally connected to the turntable, and the punching knife The coaxial sliding connection is in the rotating sleeve. When the rotating sleeve rotates relative to the turntable, it has a broaching station and a retraction station. When the punching knife slides relative to the rotating rod sleeve, it has a front punching station and a rear punching station. , the first elastic member drives the punching knife to move to the punching station; the punching rod is slidably arranged on the mounting plate in a direction parallel to the axis of the rotation shaft, and any stamping unit has a selected round hole coaxial with the punching rod. station; the sliding stroke of the punch rod has: a punching section, where the punch rod drives the punching knife in the rotating sleeve of the broaching station to switch between the pre-punching station and the post-punching station; the tool changing interval, where the punch rod passes through a The tool changing mechanism drives the turntable to rotate to switch any stamping unit to the selected station.

Description

A kind of stamping die head and stamping mold frame

Technical field

The invention relates to the technical field of stamping equipment, specifically a stamping die head and a stamping mold frame thereof.

Background technique

The stamping die head is a kind of process equipment for processing materials into parts in cold stamping processing. It uses the mold (punch knife, punch) installed on the press to exert pressure on the material, causing the material to separate or plastically deform, thereby obtaining the desired result. A pressure processing method that requires parts. In order to produce different types of separation or plastic deformation of the material, the punch knives need to be replaced. Currently, the punch knives are mainly replaced manually.

The publication number is CN111804806B, and the patent is titled "A high-speed stamping mold that facilitates the replacement of the mold head". It includes an upper template, a conversion device, an auxiliary device and a collection device. The top of the upper template is fixedly connected to a hydraulic mechanism. A pressure bar is fixedly connected to the center of the bottom end face of the formwork. A conversion device is provided on the inside of the pressure bar. A sleeve rod is slidingly connected to the outside of the pressure rod. A middle template is fixedly connected to the bottom end of the sleeve rod. The bottom of the upper template is Buffering mechanisms are fixedly connected to the left and right sides of the end. In the present invention, through the provided clamping block, this arrangement cooperates with the fixed connection between the clamping block and the support shaft, the elastic force of the first spring on the supporting shaft, the pressure rod, the clamping block and the support. The sliding connection of the shaft and the fixed connection of the supporting shaft with the cutting knife and punching knife. When using the device, by pulling and turning the handle, the mold head can be quickly replaced. The operation is simple, convenient and fast, ensuring the normal use of the stamping mold.

In the prior art such as the above-mentioned patent, the replacement of the punch knife requires manual or mechanical hands to remove the old punch knife from the equipment and then replace it with another punch knife, or actively pull and turn the handle to replace the spare punch knife, whether it is In that case, the operation is cumbersome and not convenient enough, and the efficiency of changing the punch knife needs to be improved.

Contents of the invention

The object of the present invention is to provide a stamping die head and a stamping die frame thereof to solve the above-mentioned deficiencies in the prior art.

In order to achieve the above object, the present invention provides the following technical solution: a stamping die head, including: a mounting plate; a turntable, the center of which is fixedly connected with a rotating shaft, and the rotating shaft is rotationally connected to the mounting plate; a plurality of stamping units, The turntable is arranged in a circular array around the axis of the rotating shaft. Each stamping unit includes a round hole, a rotating sleeve, a punching knife and a first elastic member. The round hole penetrates the turntable in a direction parallel to the axis of the rotating shaft. On the top, the rotating sleeve is rotatably connected to the turntable, and the punching knife is coaxially and slidingly connected in the rotating sleeve. When the rotating sleeve rotates relative to the turntable, it has a broaching station coaxial with the round hole and a tool withdrawal station that is everted toward the outside of the disc. position, when the punching knife slides relative to the rotating rod sleeve, there is a pre-punching station that has not been punched and a post-punching station that has been punched. The deformation recovery process of the first elastic member drives the punching knife to move to the front-punching station; punching The rod is slidably installed on the mounting plate in a direction parallel to the axis of the rotation shaft. During the rotation of the turntable, any punching unit has a selected station whose circular hole is coaxial with the punch rod; the driving device is installed on the installation The plate is used to drive the punch to slide. The sliding stroke of the punch has: a stamping interval. The punch drives the punch knife located in the rotating sleeve of the broach station to switch between the pre-punch station and the post-punch station; In the tool section, the punch drives the turntable to rotate through a tool changing mechanism to switch any stamping unit to the selected station.

Further, the tool changing mechanism includes: a collar, which is coaxially fixedly sleeved on the rotating shaft. A plurality of spiral guide grooves are provided on the circumferential side of the collar, and each spiral guide groove corresponds to each stamping unit one by one. , the first positions of adjacent spiral guide grooves coincide in the axis direction of the rotating shaft; the guide rail is fixedly connected to the punch; the sliding rod is slidably arranged on the guide rail, and the sliding rod is provided with a protrusion, and the protrusion can It is slidingly matched with the spiral guide groove; the sliding part is fixedly connected to the sliding rod; the first guide piece, the second guide piece and the limiting rod are all fixedly connected to the mounting plate, and the first guide piece has a first slope , the second guide member has a second inclined surface, the length direction of the limiting rod is parallel to the axial direction of the punch, and the limiting rod is located between the first inclined surface and the second inclined surface, between the limiting rod and the first inclined surface There is an interval between the limiting rod and the second inclined surface that allows the sliding part to pass.

Further, a plurality of limiting grooves are provided on the circumferential side of the rotating shaft, and each limiting groove corresponds to each stamping unit one by one. A ball head is slidably provided on the mounting plate, and a pressure is provided between the ball head and the mounting plate. The elastic force of the compression spring can make the ball head slide into the limit groove corresponding to the stamping unit located at the selected station.

Further, the turntable is provided with a plurality of through holes for avoiding the sliding rods.

Further, the first elastic member includes a tension spring, which is sleeved on the punch knife. One end of the tension spring is fixedly connected to the punch knife, and the other end is fixedly connected to the corresponding rotating sleeve.

Furthermore, it also includes a broaching mechanism, which is driven by the movement of the punch rod in the tool changing section to drive the rotation sleeve of the stamping unit located at the selected station to switch between the broaching station and the tool withdrawal station.

Further, the broaching mechanism includes: a pressing rod, which is fixedly connected to the punch rod. When the punch rod slides, the pressing rod is in sliding contact with the rotating sleeve of the stamping unit located at the selected station, so that the rotating sleeve The second elastic member rotates from the broaching station to the broaching station; the deformation recovery process of the second elastic member drives the rotating sleeve to rotate from the broaching station to the broaching position.

Further, the second elastic member includes a torsion spring. The torsion spring is sleeved on the rotating shaft between the rotating sleeve and the rotating disk. One end of the torsional spring is fixedly connected to the rotating sleeve and the other end is fixedly connected to the rotating disk.

Further, the driving device includes a hydraulic cylinder, the cylinder base of the hydraulic cylinder is fixedly connected to the mounting plate, and the hydraulic rod and the punch rod of the hydraulic cylinder are coaxially fixedly connected.

The invention also provides a stamping mold frame, which includes a workbench, a movable frame and the above-mentioned stamping die head. The mounting plate of the stamping die head is fixedly connected to the movable frame, and the movable frame is movably arranged on the workbench.

In the above technical solution, the present invention provides a stamping die head, the punch rod moves in the stamping interval, and the punch rod drives the punching knife located in the rotating sleeve of the broaching station between the pre-punching station and the post-punching station. switching to achieve stamping operation and reset; the punch moves within the tool change interval, and the punch drives the turntable to rotate through the tool change mechanism to switch any stamping unit to the selected station, thereby enabling automatic tool replacement and convenient operation. Tool changing efficiency is high.

Since the above-mentioned stamping die head has the above-mentioned technical effects, the stamping mold frame including the stamping die head should also have corresponding technical effects.

Description of the drawings

In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description only describe the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings.

Figures 1-2 are schematic structural diagrams of the punch rod provided by the embodiment of the present invention when it is located in the stamping section and the punch knife is located in the pre-punching station;

Figures 3-4 are partial structural schematic diagrams of the stamping die head provided by the embodiment of the present invention;

Figure 5 is an enlarged view of the partial structure in Figure 4 provided by an embodiment of the present invention;

Figures 6-7 are schematic structural diagrams of the punch rod provided by the embodiment of the present invention when it is located in the punching section and the punching knife is in the punching back position;

Figures 8-9 are schematic structural diagrams of the punch provided by the embodiment of the present invention when it is located at one end of the tool change interval;

Figures 10-11 are schematic structural diagrams of the punch provided by the embodiment of the present invention when it is located at the other end of the tool change interval;

Figure 12 is a schematic structural diagram of the cooperation between the ball head and the limiting groove provided by the embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a stamping mold base provided by an embodiment of the present invention.

Explanation of reference symbols:

1. Mounting plate; 1.1. Ball head; 1.2. Compression spring; 2. Turntable; 3. Rotating shaft; 3.1. Limiting groove; 4. Stamping unit; 4.1. Round hole; 4.2. Rotating sleeve; 4.3. Punching knife; 4.4. First elastic member; 5. Punch rod; 6. Driving device; 7. Tool changing mechanism; 7.1. Collar; 7.2. Spiral guide groove; 7.3. Guide rail; 7.4. Sliding rod; 7.5. Protrusion; 7.6. Sliding part; 7.7, first guide; 7.71, first slope; 7.8, second guide; 7.81, second slope; 7.9, limit rod; 8, pressure rod; 9, second elastic member; 10, Workbench; 11. Mobile stand.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be introduced in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1-13, an embodiment of the present invention provides a stamping die head, which includes a mounting plate 1, a turntable 2, a plurality of stamping units 4, punch rods 5 and a driving device 6. The center of the turntable 2 is fixedly connected with a The rotating shaft 3 is rotatably connected to the mounting plate 1; each stamping unit 4 is arranged on the turntable 2 in a circular array around the axis of the rotating shaft 3. Each stamping unit 4 includes a circular hole 4.1, a rotating sleeve 4.2, a punching The knife 4.3 and the first elastic member 4.4, the circular hole 4.1 are opened on the turntable 2 in a direction parallel to the axis of the rotating shaft 3, the rotating sleeve 4.2 is rotatably connected to the rotating disk 2, and the punching knife 4.3 is coaxially and slidingly connected to the rotating sleeve 4.2 Inside, when the rotating sleeve 4.2 rotates relative to the rotating disk 2, it has a broaching station coaxial with the circular hole 4.1 and a retracting station that is everted toward the outside of the disk. When the punching knife 4.3 slides relative to the rotating rod sleeve, it has an unfinished tool station. In the pre-punching station and a post-punching station, the deformation recovery process of the first elastic member 4.4 drives the punching knife 4.3 to move to the pre-punching station. The first elastic member 4.4 is preferably a tension spring, and the tension spring is sleeved On the punch knife 4.3, one end of the tension spring is fixedly connected to the punch knife 4.3, and the other end is fixedly connected to the corresponding rotating sleeve 4.2; the punch rod 5 is slidably arranged on the mounting plate 1 in a direction parallel to the axis of the rotating shaft 3, and the turntable 2 During the rotation process, any stamping unit 4 has a selected station whose circular hole 4.1 is coaxial with the punch 5; the driving device 6 is installed on the mounting plate 1 and is used to drive the punch 5 to slide. The sliding stroke has a stamping section and a tool-changing section. In the stamping section, the punch rod 5 drives the punching knife 4.3 located in the rotating sleeve 4.2 of the broaching station to switch between the pre-punching station and the post-punching station; in the tool-changing section , the punch rod 5 drives the turntable 2 to rotate through a tool change mechanism 7 to switch any stamping unit 4 to the selected station.

In the above technical solution, the invention provides a stamping die head, the punch 5 moves in the stamping interval, and the punch 5 drives the punch 4.3 located in the rotating sleeve 4.2 of the broach station to move between the pre-punching station and the post-punching station. Switch between stations to achieve stamping operation and reset; the punch 5 moves within the tool change interval, and the punch 5 drives the turntable 2 to rotate through the tool change mechanism 7 to switch any stamping unit 4 to the selected station, thereby It can realize automatic tool change, convenient operation and high tool change efficiency.

As a preferred technical solution of the present invention, the tool change mechanism 7 includes a collar 7.1, a guide rail 7.3, a sliding rod 7.4, a sliding part 7.6, a first guide 7.7, a second guide 7.8 and a limiting rod 7.9, wherein the collar 7.1 The coaxial fixed sleeve is connected to the rotating shaft 3. A plurality of spiral guide grooves 7.2 are provided on the circumferential side of the collar 7.1. Each spiral guide groove 7.2 corresponds to each stamping unit 4 one by one. The first position of the adjacent spiral guide groove 7.2 rotates The axis directions of the shafts 3 coincide with each other; the guide rail 7.3 is fixedly connected to the punch 5; the sliding rod 7.4 is slidably provided on the guide rail 7.3, and the sliding rod 7.4 is provided with a protrusion 7.5, and the protrusion 7.5 can slide with the spiral guide groove 7.2; The sliding part 7.6 is fixedly connected to the sliding rod 7.4, and the turntable 2 is provided with multiple through holes to avoid the sliding rod 7.4; the first guide part 7.7, the second guide part 7.8 and the limiting rod 7.9 are all fixedly connected to the installation plate 1 , the first guide member 7.7 has a first inclined surface 7.71, the second guide member 7.8 has a second inclined surface 7.81, the length direction of the limiting rod 7.9 is parallel to the axial direction of the punch 5, and the limiting rod 7.9 is located at the first There is an interval between the inclined surface 7.71 and the second inclined surface 7.81, between the limiting rod 7.9 and the first inclined surface 7.71, and between the limiting rod 7.9 and the second inclined surface 7.81 for the sliding part 7.6 to pass.

As a preferred technical solution, refer to Figure 12, a plurality of limiting grooves 3.1 are provided on the circumferential side of the rotating shaft 3. Each limiting groove 3.1 corresponds to each stamping unit 4 one by one. The sliding grooves provided on the mounting plate 1 slide inside. A ball head 1.1 is provided, and a compression spring 1.2 is provided between the ball head 1.1 and the mounting plate 1. The elastic force of the compression spring 1.2 can make the ball head 1.1 slide into the limit groove 3.1 corresponding to the stamping unit 4 located at the selected station. .

As a further preferred technical solution of the present invention, it also includes a broach mechanism. The broach mechanism is driven by the movement of the punch 5 in the tool change interval to drive the rotating sleeve 4.2 of the stamping unit 4 located at the selected station to move between the broach station and Switch between retraction stations. Specifically, the broach mechanism includes a pressure rod 8 and a second elastic member 9. The pressure rod 8 is fixedly connected to the punch rod 5. When the punch rod 5 slides, it communicates with the stamping unit 4 located at the selected station through the pressure rod 8. The rotating sleeve 4.2 has a sliding contact fit, so that the rotating sleeve 4.2 rotates from the tool retracting station to the broaching station; the deformation recovery process of the second elastic member 9 drives the rotating sleeve 4.2 to rotate from the broaching station to the tool retracting position; preferably, the first The two elastic members 9 include torsion springs, which are sleeved on the rotating shaft between the rotating sleeve 4.2 and the turntable 2. One end of the torsion spring is fixedly connected to the rotating sleeve 4.2, and the other end is fixedly connected to the turntable 2.

As a preferred technical solution of the present invention, the driving device 6 includes a hydraulic cylinder or a pneumatic cylinder, the cylinder base of the hydraulic cylinder or pneumatic cylinder is fixedly connected to the mounting plate 1 , and the hydraulic rod of the hydraulic cylinder or the air rod of the pneumatic cylinder is coaxially fixedly connected to the punch rod 5 .

The working principle of the stamping die head provided by the present invention is as follows: the movement of the punch 5 in the stamping interval includes the downward movement distance D1 and the upward movement reset distance D2. At the beginning of the D1 process (as shown in Figure 1-5), the punch 5 The bottom of the rod 5 is in contact with the top of the punching knife 4.3 in the rotating sleeve 4.2 of the broaching station. At this time, the punching knife 4.3 is located at the pre-punching station. The D1 process of the punching rod 5 presses the punching knife 4.3 downward, causing the punching knife 4.3 to punch. The knife 4.3 drops to the post-punching station, and the punch knife 4.3 completes the stamping operation on the workpiece below (as shown in Figure 6-7). Then the punch rod 5 resets upward D2, and the elastic force of the first elastic member 4.4 is released, causing the punch knife 4.3 to move upward. Resetting to the pre-punching station means that one stamping cycle is completed, and the operation of the next stamping cycle can be continued, and so on; in the stamping interval, except for the rotating sleeve 4.2 of the stamping unit 4 of the selected station, it is in the broaching station In addition, other stamping units 4 are all in the retracting position, and other stamping units 4 will not hinder the stamping operation; in the stamping interval, the punch rod 5 is finally inserted into the corresponding round hole 4.1. When it is necessary to replace the punching knife 4.3, first make the punching rod 5 located at the beginning of the D1 process, and the punching knife 4.3 in the rotating sleeve 4.2 of the broaching station is located at the punching front station, and then the punching rod 5 moves in the tool changing interval. The movement of the punch 5 in the tool change interval includes the upward movement distance D3 and the downward movement reset distance D4. The starting point of the D3 process is the starting point of the D1 process and the end of the D2 process. In the D3 process, the punch The rod 5 drives the guide rail 7.3, the sliding rod 7.4, the protrusion 7.5, the sliding part 7.6 and the pressure rod 8 to move upward together. On the one hand, the upward movement of the pressure rod 8 makes the second elasticity of the stamping unit 4 at the selected station The elastic force of the component 9 is released, and the second elastic component 9 causes the rotating sleeve 4.2 of the stamping unit 4 of the selected station to rotate to the retracting position. At this time, all the stamping units 4 are in the retracting position. On the other hand, when punching When the bottom of the rod 5 moves to no lower than the upper surface of the turntable 2 (that is, the punch 5 comes out of the circular groove), the protrusion 7.5 on the sliding rod 7.4 enters the opposite spiral guide groove 7.2 (as shown in the figure) 8-9), the protrusion 7.5 is in sliding fit with the spiral guide groove 7.2 (the limiting rod 7.9 limits the sliding part 7.6 to keep the protrusion 7.5 in the spiral guide groove 7.2), driving the collar 7.1 to rotate, and the collar 7.1 drives the The rotating shaft 3, the turntable 2 and all the stamping units 4 rotate together. When the protrusion 7.5 moves up to the top of the corresponding spiral guide groove 7.2 and breaks away from the spiral guide groove 7.2, the next stamping unit 4 rotates to the selected station (such as Figure 10-11), and then the charging rod continues to move upward to end D3. During this period, the sliding part 7.6 on the sliding rod 7.4 is in sliding contact with the second inclined surface 7.81 of the second guide member 7.8, so that the sliding rod 7.4 slides along the guide rail 7.3. As a result, the protrusion 7.5 is completely staggered from the spiral guide groove 7.2 in the vertical direction; then the punch 5 returns downward and moves D4. On the one hand, the protrusion 7.5 does not contact the spiral guide groove 7.2 until the height of the protrusion 7.5 is lower than In the spiral guide groove 7.2, at the end of D4, the sliding part 7.6 is in sliding contact with the first inclined surface 7.71 of the first guide part 7.7, so that the sliding rod 7.4 slides back along the guide rail 7.3 in the reverse direction, and the protrusion 7.5 moves in the vertical direction. The top coincides with the bottom of the corresponding spiral groove at this time. On the other hand, the pressure rod 8 is in sliding contact with the rotating sleeve 4.2 of the stamping unit 4 located at the selected station, so that the rotating sleeve 4.2 rotates to Broaching station; next, if the required punching tool 4.3 has been selected, the punch 5 will enter the stamping section for punching. If the required punching tool 4.3 is not selected, the punch 5 will continue to enter the tool changing section. Change the tool until a suitable punching tool is found 4.3.

The present invention also provides a stamping mold frame. Refer to Figure 13. It includes a workbench 10, a movable frame 11 and the above-mentioned stamping die head. The mounting plate 1 of the stamping die head is fixedly connected to the movable frame 11. The movable frame 11 is movable and disposed on On workbench 10. The stamping die base has all the technical effects of the stamping die head, and the stamping die head can adjust its position relative to the workbench 10 by moving the bracket, and perform multi-station stamping operations with the stamping die head on the workpiece placed on the workbench 10 .

Certain exemplary embodiments of the present invention have been described above only by way of illustration. It goes without saying that those skilled in the art can implement various embodiments in various ways without departing from the spirit and scope of the present invention. The described embodiments are modified. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims (10)

1. A stamping die head, comprising:

a mounting plate;

the center of the turntable is fixedly connected with a rotating shaft which is rotatably connected to the mounting plate;

the punching device comprises a rotary table, a plurality of punching units, a rotary sleeve, a punching cutter and a first elastic piece, wherein the rotary table is arranged on the rotary table in a circumferential array around the axis of the rotary table, the round hole is penetrated and formed in the rotary table along the direction parallel to the axis of the rotary table, the rotary sleeve is rotationally connected to the rotary table, the punching cutter is coaxially and slidingly connected in the rotary sleeve, a broach station coaxial with the round hole and a retracting station outwards turned towards the outer side of the rotary table are arranged in the rotary sleeve rotating process relative to the rotary table, an un-punched pre-punching station and a punched post-punching station are arranged in the sliding process of the punching cutter relative to the rotary rod sleeve, and the first elastic piece is used for driving the punching cutter to move to the pre-punching station in the deformation recovery process;

the punch rod is arranged on the mounting plate in a sliding manner along the direction parallel to the axis of the rotating shaft, and any punching unit is provided with a selected station with a round hole coaxial with the punch rod in the rotating process of the turntable;

and a driving device mounted on the mounting plate for driving the plunger to slide, the plunger having in a sliding stroke:

in the punching interval, a punching rod drives a punching cutter in a rotating sleeve of a broach station to switch between a pre-punching station and a post-punching station;

in the tool changing section, the punch rod drives the turntable to rotate through a tool changing mechanism so as to switch any punching unit to a selected station.

2. The stamping die head of claim 1, wherein the tool changing mechanism comprises:

the sleeve ring is coaxially and fixedly sleeved on the rotating shaft, a plurality of spiral guide grooves are formed in the periphery of the sleeve ring, each spiral guide groove corresponds to each stamping unit one by one, and the first positions of adjacent spiral guide grooves are overlapped in the axis direction of the rotating shaft;

the guide rail is fixedly connected to the punch rod;

the sliding rod is arranged on the guide rail in a sliding way, and is provided with a protrusion which can be in sliding fit with the spiral guide groove;

a sliding part fixedly connected to the sliding rod;

the first guide piece, the second guide piece and the limiting rod are all fixedly connected to the mounting plate, the first guide piece is provided with a first inclined plane, the second guide piece is provided with a second inclined plane, the length direction of the limiting rod is parallel to the axial direction of the punch rod, the limiting rod is located between the first inclined plane and the second inclined plane, and a space capable of enabling the sliding part to pass through is reserved between the limiting rod and the first inclined plane and between the limiting rod and the second inclined plane.

3. The stamping die head according to claim 2, wherein a plurality of limit grooves are formed in the peripheral side face of the rotating shaft, each limit groove corresponds to each stamping unit one by one, a ball head is slidably arranged on the mounting plate, a pressure spring is arranged between the ball head and the mounting plate, and the ball head can slide into the limit groove corresponding to the stamping unit located at the selected station by the aid of elasticity of the pressure spring.

4. The stamping die head of claim 2, wherein the turntable is provided with a plurality of through holes for avoiding the slide bar.

5. The stamping die head according to claim 1, wherein the first elastic member comprises a tension spring, the tension spring is sleeved on the stamping knife, one end of the tension spring is fixedly connected with the stamping knife, and the other end of the tension spring is fixedly connected with the corresponding rotating sleeve.

6. A stamping die head as claimed in claim 1 or claim 2, further comprising a broaching mechanism which is driven by movement of the ram in the tool change region to drive the rotating sleeve of the stamping unit at the selected station to switch between the broaching station and the retracting station.

7. The stamping die head as defined in claim 6, wherein the broaching mechanism comprises:

the pressing rod is fixedly connected to the punch rod, and the punch rod is in sliding contact fit with the rotating sleeve of the punching unit positioned at the selected station through the pressing rod when in sliding, so that the rotating sleeve rotates from the tool retracting station to the tool pulling station;

and the second elastic piece drives the rotating sleeve to rotate from the broach station to the tool retracting station in the process of recovering deformation.

8. The stamping die head of claim 7, wherein the second elastic member comprises a torsion spring, the torsion spring is sleeved on the rotating shaft between the rotating sleeve and the turntable, one end of the torsion spring is fixedly connected with the rotating sleeve, and the other end of the torsion spring is fixedly connected with the turntable.

9. The stamping die head of claim 1, wherein the driving device comprises a hydraulic cylinder, a cylinder seat of the hydraulic cylinder is fixedly connected to the mounting plate, and a hydraulic rod of the hydraulic cylinder is coaxially and fixedly connected with the punch rod.

10. A stamping die carrier, comprising a workbench, a movable frame and the stamping die head of any one of claims 1-9, wherein the mounting plate of the stamping die head is fixedly connected to the movable frame, and the movable frame is movably arranged on the workbench.