Drawing die fixing structure of combined drawing machine

Abstract

The utility model discloses a kind of drawing die fixing structure of combined drawing bench, it is related to combined drawing bench technical field, including substrate, the substrate outside is equipped with die holder, the die holder is fixed with die body in, the both sides of die holder are fixed with fixed plate, the fixed plate is inserted with the inserted rod in substrate, the inserted rod top end is inserted with fixed sleeve, the fixed sleeve is equipped with clamping block, the clamping block is provided with multiple groups and outer wall is all connected with push spring, the inserted rod outer wall is equipped with clamping groove, the clamping groove is provided with multiple groups and respectively with multiple clamping blocks, the fixed sleeve outer wall is equipped with sliding slot, the sliding slot is provided with multiple groups and slidingly connected with push ring, the push ring outer wall is fixed with sliding sleeve, the fixed sleeve outer wall is rotatably equipped with rotating sleeve, the rotating sleeve bottom is fixed with rotating rod, and the device is realized the automatic locking function of die by setting multiple movable grooves in fixed sleeve inside and cooperating with push spring and clamping block.

Description

Technical Field

[0001] This utility model relates to the field of combined drawing machine technology, and more specifically, it relates to a drawing die fixing structure for a combined drawing machine. Background Technology

[0002] In combined drawing machine processing, drawing dies need to be frequently changed according to different wire specifications and processing requirements. Traditional die fixing methods mostly use bolt fastening or pressure plate clamping structures. During installation, tools such as wrenches are needed to tighten the fasteners one by one, and during disassembly, tools are needed to loosen them one by one. The operation steps are cumbersome and time-consuming. Especially in the case of continuous processing of multi-specification wires that requires frequent die changes, it seriously affects production efficiency. At the same time, traditional fastening methods cannot guarantee that the pre-tightening force is consistent for each installation. Insufficient locking force can easily cause the die to loosen, affecting the drawing accuracy, or excessive locking force can damage the die.

[0003] During the high-speed operation of the drawing machine, the wire generates a large pulling force and vibration when passing through the die. Traditional locking structures are prone to loosening of fasteners after long-term operation and lack the function of locking the fastening state. Operators may accidentally touch the fasteners during operation, causing the die to loosen unexpectedly and resulting in production accidents. Traditional fixing structures also lack the function of axial pre-tightening of the die, making it difficult to ensure that the die maintains a stable installation position under vibration conditions. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a drawing die fixing structure for a combined drawing machine to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a drawing die fixing structure for a combined drawing machine, comprising a base plate, a die holder on the outer side of the base plate, a die body fixedly disposed within the die holder, fixing plates fixedly disposed on both sides of the die holder, a rod inserted into the fixing plate and the base plate, a fixing sleeve inserted at the top of the rod, a locking block disposed within the fixing sleeve, multiple sets of locking blocks, each with a push spring connected to its outer wall, a slot formed on the outer wall of the rod, multiple sets of slots engaging with multiple sets of locking blocks, a sliding groove formed on the outer wall of the fixing sleeve, multiple sets of sliding grooves slidably connected to a push ring, a sliding sleeve fixedly disposed on the outer wall of the push ring, a rotating sleeve rotatably disposed on the outer wall of the fixing sleeve, a rotating rod fixedly disposed on the bottom surface of the rotating sleeve, multiple sets of rotating rods, each with a mating hole on its outer wall, and a slanted arc rod fixedly disposed on the outer wall of the sliding sleeve, multiple sets of slanted arc rods slidably connected to multiple sets of mating holes.

[0008] The present invention is further configured such that a fixing hole is provided on the outer wall of the fixing plate, and an insertion hole is provided on the outer wall of the substrate. The insertion rod is inserted into the insertion hole and the fixing hole. The positioning connection between the mold base and the substrate is achieved through the insertion and cooperation of the insertion rod with the fixing hole and the insertion hole to ensure accurate mold installation position.

[0009] The present invention is further configured such that a guide plate is fixedly provided on the inner side of the push ring, and a guide groove is provided on the outer wall of the insertion rod. Multiple sets of guide plates and guide grooves are provided. The guide plate slides along the guide groove to guide the insertion direction of the fixed sleeve to ensure that the card block and the card groove can be accurately aligned.

[0010] The present invention is further configured such that a compression spring is connected to the inner side of the fixed sleeve, and a compression block is fixed at the bottom end of the compression spring. The compression spring pushes the compression block to apply an axial preload to the fixed plate to ensure that the mold base remains firmly installed under vibration conditions.

[0011] The present invention is further configured such that a mounting block is fixedly provided on the top surface of the rotating sleeve, the mounting block is provided in multiple sets and a return spring is connected to the inner side of each set, a positioning block is connected to the bottom end of each set of return springs, a positioning sleeve is fixedly provided on the outer wall of the fixed sleeve, and a positioning hole is provided on the outer wall of the positioning sleeve. The positioning hole is provided in multiple sets and abuts against the positioning blocks of each set. The positioning block is pushed into the positioning hole by the return spring to realize the automatic position locking of the rotating sleeve to prevent accidental rotation during operation and mold loosening.

[0012] The present invention is further configured such that each of the multiple sets of positioning blocks has a fixed abutment block at its top, and the multiple sets of abutment blocks are slidably connected to the multiple sets of mounting blocks respectively. By pressing the abutment block, the positioning block is driven to slide away from the positioning hole along the mounting block to realize the unlocking function of the rotating sleeve.

[0013] The present invention is further configured such that a limiting sleeve is slidably provided on the outer wall of the fixed sleeve, the inner side of the limiting sleeve abuts against multiple sets of abutting blocks, and a compression spring is provided between the limiting sleeve and the fixed sleeve. The limiting sleeve abuts against the outer side of the abutting block to form a double lock to prevent the abutting block from being accidentally pressed, which would cause the rotating sleeve to be accidentally unlocked.

[0014] The present invention is further configured such that the fixed sleeve has a movable groove, and the movable groove is provided with multiple sets, and multiple sets of locking blocks are rotatably installed in the movable groove. The top surface of each set of locking blocks is set to be arc-shaped and is slidably connected to the multiple sets of movable grooves. The arc-shaped structure of the top surface of the locking block facilitates the insertion rod to smoothly push the locking block into the inner cavity of the fixed sleeve to achieve the automatic locking function.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a drawing die fixing structure for a combined drawing machine, which has the following beneficial effects:

[0017] 1. This device achieves automatic mold locking by setting multiple sets of movable slots on the inner side of the fixed sleeve and cooperating with push springs and locking blocks. When the fixed sleeve is inserted into the insertion rod, the arc-shaped structure on the top surface of the locking block facilitates the insertion rod to enter smoothly. After the fixed sleeve is in place, the push spring automatically pushes the locking block into the slot to complete the locking. The entire installation process does not require any tools and the push spring can provide a consistent locking force, avoiding mold loosening or damage caused by uneven tightening force, and greatly improving mold replacement efficiency.

[0018] 2. This device achieves unlocking with a single rotation operation through the linkage of the rotating sleeve, the inclined arc rod, and the sliding sleeve. The rotating sleeve converts the rotational motion into linear sliding motion of the sliding sleeve through the sliding hole and the inclined arc rod, pushing the push ring to disengage the locking block from the slot. The mold can be quickly disassembled without loosening the fasteners one by one. At the same time, the cooperation of the guide plate and the guide groove provides precise guidance for the insertion direction of the fixed sleeve, ensuring that the locking block and the slot can be accurately aligned during installation.

[0019] 3. This device achieves automatic position locking of the rotating sleeve by using the positioning block inside the mounting block in conjunction with the positioning spring and the positioning hole of the positioning sleeve. The limiting sleeve abuts against the outside of the abutting block under the action of the compression spring to form a double lock, effectively preventing the rotating sleeve from accidentally rotating due to vibration during operation and causing the mold to loosen. At the same time, the extrusion spring pushes the extrusion block to apply a stable axial preload to the fixed plate to ensure that the mold base remains firmly installed under vibration conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the drawing die fixing structure of a combined drawing machine according to the present invention.

[0021] Figure 2 This is a structural diagram of the mold base in the disassembled state in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the insert rod and the fixing sleeve in this utility model;

[0023] Figure 4 This is a cross-sectional view of the fixing sleeve in this utility model;

[0024] Figure 5 This is a cross-sectional view of the rotating sleeve in this utility model.

[0025] In the diagram: 1. Base plate; 2. Mold base; 3. Mold body; 4. Fixing plate; 5. Insert rod; 6. Fixing sleeve; 7. Clamping block; 8. Push spring; 9. Clamping groove; 10. Slide groove; 11. Push ring; 12. Slide sleeve; 13. Rotating sleeve; 14. Rotating rod; 15. Mating hole; 16. Inclined arc rod; 17. Fixing hole; 18. Insertion hole; 19. Guide plate; 20. Guide groove; 21. Compression spring; 22. Compression block; 23. Mounting block; 24. Reset spring; 25. Positioning block; 26. Positioning sleeve; 27. Positioning hole; 28. Abutment block; 29. ​​Limiting sleeve; 30. Compression spring; 31. Movable groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A drawing die fixing structure for a combined drawing machine includes a base plate 1, a die holder 2 on the outer side of the base plate 1, a die body 3 fixed inside the die holder 2, fixing plates 4 fixed on both sides of the die holder 2, a rod 5 inserted into the fixing plate 4 and the base plate 1, a fixing sleeve 6 inserted into the top of the rod 5, a locking block 7 inside the fixing sleeve 6, multiple sets of locking blocks 7, each with a push spring 8 connected to its outer wall, a slot 9 on the outer wall of the rod 5, multiple sets of slots 9 engaging with multiple sets of locking blocks 7, a sliding groove 10 on the outer wall of the fixing sleeve 6, multiple sets of sliding grooves 10 slidably connected to a push ring 11, a sliding sleeve 12 fixed to the outer wall of the push ring 11, a rotating sleeve 13 rotatably mounted on the outer wall of the fixing sleeve 6, a rotating rod 14 fixed to the bottom surface of the rotating sleeve 13, multiple sets of rotating rods 14, each with a mating hole 15 on its outer wall, and a slanted arc rod 16 fixed to the outer wall of the sliding sleeve 12, multiple sets of slanted arc rods 16 slidably connected to multiple sets of mating holes 15.

[0030] In this embodiment, during mold installation, the mold body 3 is first fixedly installed inside the mold base 2. The fixing plates 4 on both sides of the mold base 2 are fixedly connected to the mold base 2 to form an integral assembly. Then, the insertion rod 5 is sequentially passed through the insertion hole 18 on the outer wall of the substrate 1 and the fixing hole 17 on the outer wall of the fixing plate 4 to complete the positioning connection between the mold base 2 and the substrate 1. Next, the fixing sleeve 6 is aligned with the top of the insertion rod 5 and inserted downwards. During the insertion process, the outer wall of the insertion rod 5 pushes the multiple sets of locking blocks 7 in the movable groove 31 inside the fixing sleeve 6 to rotate outwards and compress the push spring 8. The arc-shaped structure on the top surface of the multiple sets of locking blocks 7 facilitates the insertion rod 5 to smoothly push the locking blocks 7 into the inner cavity of the fixing sleeve 6. When the fixing sleeve 6 is inserted into place, the push spring 8 releases elastic potential energy to push the multiple sets of locking blocks 7 to automatically engage in the multiple sets of locking slots 9 on the outer wall of the insertion rod 5 to complete the locking. The guide plate 19 on the inner side of the push ring 11 slides along the guide groove 20 on the outer wall of the insertion rod 5 to guide the insertion direction of the fixing sleeve 6 to ensure accurate installation. The compression spring 21 inside the fixed sleeve 6 pushes the compression block 22 downward to press the fixed plate 4 and apply axial preload to ensure that the mold base 2 is installed firmly. At the same time, the positioning block 25 inside the mounting block 23 on the top surface of the rotating sleeve 13 automatically springs into the positioning hole 27 of the positioning sleeve 26 on the outer wall of the fixed sleeve 6 under the action of the reset spring 24 to lock the position of the rotating sleeve 13. The limiting sleeve 29 abuts against the outside of multiple sets of abutment blocks 28 under the action of the compression spring 30 to form a double lock to prevent accidental rotation during operation that could cause the mold to loosen.

[0031] Please see Figures 3-5 As a further implementation of the overall equipment: the outer wall of the fixing plate 4 is provided with fixing holes 17, the outer wall of the base plate 1 is provided with insertion holes 18, and the insertion rod 5 is inserted into the insertion holes 18 and fixing holes 17.

[0032] A guide plate 19 is fixedly provided on the inner side of the push ring 11, and a guide groove 20 is provided on the outer wall of the insertion rod 5. Multiple sets of guide plates 19 and guide grooves 20 are provided.

[0033] A compression spring 21 is connected to the inner side of the fixed sleeve 6, and a compression block 22 is fixedly provided at the bottom end of the compression spring 21.

[0034] The top surface of the rotating sleeve 13 is fixedly provided with an installation block 23. The installation block 23 is provided with multiple sets and each of them is connected to a return spring 24. The bottom end of each of the multiple sets of return springs 24 is connected to a positioning block 25. The outer wall of the fixed sleeve 6 is fixedly provided with a positioning sleeve 26. The outer wall of the positioning sleeve 26 is provided with a positioning hole 27. The positioning hole 27 is provided with multiple sets and abuts against the multiple sets of positioning blocks 25 respectively.

[0035] Each of the multiple positioning blocks 25 has a fixed abutment block 28 at its top, and the multiple abutment blocks 28 are slidably connected to the multiple mounting blocks 23 respectively.

[0036] A limiting sleeve 29 is slidably provided on the outer wall of the fixed sleeve 6. The inner side of the limiting sleeve 29 abuts against multiple sets of abutting blocks 28. A compression spring 30 is provided between the limiting sleeve 29 and the fixed sleeve 6.

[0037] The fixed sleeve 6 has a movable groove 31. Multiple sets of movable grooves 31 are provided. Multiple sets of locking blocks 7 are rotatably installed in the movable grooves 31. The top surfaces of the multiple sets of locking blocks 7 are all arc-shaped and are slidably connected to the multiple sets of movable grooves 31.

[0038] More specifically, when it is necessary to disassemble and replace the mold, first push the limiting sleeve 29 upward to compress the compression spring 30 so that the limiting sleeve 29 is disengaged from the abutment state of the multiple sets of abutment blocks 28. The multiple sets of compression springs 30 are reset to pull the positioning block 25 so that it is disengaged from the positioning hole 27 to release the positioning of the rotating sleeve 13. Then rotate the rotating sleeve 13. The rotating sleeve 13 drives the multiple sets of rotating rods 14 fixed on its bottom surface to rotate synchronously. The mating hole 15 on the outer wall of the rotating rod 14 slides with the inclined arc rod 16 on the outer wall of the sliding sleeve 12. The inclined arc rod 16 converts the rotational motion of the rotating sleeve 13 into the sliding of the sliding sleeve 12 along the straight upward sliding groove 10 on the outer wall of the fixed sleeve 6 through the inclined arc trajectory. The sliding sleeve 12 drives the push ring 11 to move upward synchronously. The push ring 11 pushes the multiple sets of locking blocks 7 in the movable groove 31 inside the fixed sleeve 6 to rotate along the movable groove 31 and compress the push spring 8, so that the multiple sets of locking blocks 7 are disengaged from the locking groove 9 on the outer wall of the insert rod 5 to release the locking state. At this point, lifting the fixing sleeve 6 upwards will remove it from the insert rod 5. The compression spring 21 and the compression block 22 will be removed together with the fixing sleeve 6 to release the axial compression on the fixing plate 4. Then the insert rod 5 can be pulled out from the fixing hole 17 and the insertion hole 18 to separate the mold base 2 from the base plate 1 and complete the disassembly. After replacing the new mold, the above installation process can be repeated.

[0039] In summary, during the use or operation of the overall equipment: When installing the mold, firstly, the mold body 3 is fixedly installed inside the mold base 2. The fixing plates 4 on both sides of the mold base 2 are fixedly connected to the mold base 2 to form an integral component. Then, the insertion rod 5 is sequentially passed through the insertion hole 18 on the outer wall of the base plate 1 and the fixing hole 17 on the outer wall of the fixing plate 4 to complete the positioning connection between the mold base 2 and the base plate 1. Next, the fixing sleeve 6 is aligned with the top of the insertion rod 5 and inserted downwards. During the insertion process, the outer wall of the insertion rod 5 pushes the multiple sets of locking blocks 7 in the movable groove 31 inside the fixing sleeve 6 to rotate outwards and compress the push spring 8. The arc-shaped structure on the top surface of the multiple sets of locking blocks 7 facilitates the insertion rod 5 to smoothly push the locking blocks 7 into the inner cavity of the fixing sleeve 6. After the fixing sleeve 6 is inserted into place, the push spring 8 releases its elastic potential energy to push the multiple sets of locking blocks 7 to automatically engage in the corresponding multiple sets of locking slots 9 on the outer wall of the insertion rod 5 to complete the locking. The guide plate 19 on the inner side of the push ring 11 slides along the guide groove 20 on the outer wall of the insertion rod 5 to guide the insertion direction of the fixing sleeve 6 to ensure accurate installation. The compression spring 21 inside the fixed sleeve 6 pushes the compression block 22 downward to press the fixed plate 4 and apply axial preload to ensure that the mold base 2 is installed firmly. At the same time, the positioning block 25 inside the mounting block 23 on the top surface of the rotating sleeve 13 automatically springs into the positioning hole 27 of the positioning sleeve 26 on the outer wall of the fixed sleeve 6 under the action of the reset spring 24 to lock the position of the rotating sleeve 13. The limiting sleeve 29 abuts against the outside of multiple sets of abutment blocks 28 under the action of the compression spring 30 to form a double lock to prevent accidental rotation during operation that could cause the mold to loosen.

[0040] When the mold needs to be disassembled and replaced, first push the limiting sleeve 29 upward to compress the compression spring 30 so that the limiting sleeve 29 is disengaged from the abutment state of the multiple sets of abutment blocks 28. The multiple sets of compression springs 30 are reset to pull the positioning block 25 so that it is disengaged from the positioning hole 27 to release the positioning of the rotating sleeve 13. Then rotate the rotating sleeve 13. The rotating sleeve 13 drives the multiple sets of rotating rods 14 fixed on its bottom surface to rotate synchronously. The mating hole 15 on the outer wall of the rotating rod 14 slides with the inclined arc rod 16 on the outer wall of the sliding sleeve 12. The inclined arc rod 16 converts the rotational motion of the rotating sleeve 13 into the sliding of the sliding sleeve 12 along the straight upward sliding groove 10 on the outer wall of the fixed sleeve 6 through the inclined arc trajectory. The sliding sleeve 12 drives the push ring 11 to move upward synchronously. The push ring 11 pushes the multiple sets of locking blocks 7 in the movable groove 31 inside the fixed sleeve 6 to rotate along the movable groove 31 and compress the push spring 8, so that the multiple sets of locking blocks 7 are disengaged from the locking groove 9 on the outer wall of the insert rod 5 to release the locking state. At this point, lifting the fixing sleeve 6 upwards will remove it from the insert rod 5. The compression spring 21 and the compression block 22 will be removed together with the fixing sleeve 6 to release the axial compression on the fixing plate 4. Then the insert rod 5 can be pulled out from the fixing hole 17 and the insertion hole 18 to separate the mold base 2 from the base plate 1 and complete the disassembly. After replacing the new mold, the above installation process can be repeated.

[0041] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option.

[0042] In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail.

[0043] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be described in detail in this utility model.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drawing die fixing structure for a combined drawing machine, comprising a base plate (1), characterized in that: A mold base (2) is provided on the outer side of the substrate (1). A mold body (3) is fixedly provided inside the mold base (2). Fixing plates (4) are fixed on both sides of the mold base (2). A rod (5) is inserted into the fixing plate (4) and the substrate (1). A fixing sleeve (6) is inserted into the top of the rod (5). A locking block (7) is provided inside the fixing sleeve (6). Multiple sets of locking blocks (7) are provided, and each of them is connected to a push spring (8). A slot (9) is opened on the outer wall of the rod (5). Multiple sets of slots (9) are provided and each of them engages with multiple sets of locking blocks (7). The outer wall of the fixed sleeve (6) is provided with a sliding groove (10), the sliding groove (10) is provided with multiple sets and is slidably connected with a push ring (11), the outer wall of the push ring (11) is fixedly provided with a sliding sleeve (12), the outer wall of the fixed sleeve (6) is rotatably provided with a rotating sleeve (13), the bottom surface of the rotating sleeve (13) is fixedly provided with a rotating rod (14), the rotating rod (14) is provided with multiple sets and each of the rotating rods (14) is provided with a mating hole (15) on its outer wall, the outer wall of the sliding sleeve (12) is fixedly provided with a slanted arc rod (16), the slanted arc rod (16) is provided with multiple sets and is slidably connected to multiple sets of mating holes (15).

2. The drawing die fixing structure of a combined drawing machine according to claim 1, characterized in that: The outer wall of the fixing plate (4) is provided with a fixing hole (17), and the outer wall of the base plate (1) is provided with an insertion hole (18). The insertion rod (5) is inserted into the insertion hole (18) and the fixing hole (17).

3. The drawing die fixing structure of a combined drawing machine according to claim 2, characterized in that: The inner side of the push ring (11) is fixedly provided with a guide plate (19), and the outer wall of the insert rod (5) is provided with a guide groove (20). Multiple sets of guide plates (19) and guide grooves (20) are provided.

4. The drawing die fixing structure of a combined drawing machine according to claim 3, characterized in that: A compression spring (21) is connected to the inner side of the fixed sleeve (6), and a compression block (22) is fixed at the bottom end of the compression spring (21).

5. The drawing die fixing structure of a combined drawing machine according to claim 4, characterized in that: The rotating sleeve (13) is fixedly provided with an installation block (23) on its top surface. The installation block (23) is provided with multiple sets and each set is connected to a return spring (24) on its inner side. The bottom end of each set of return springs (24) is connected to a positioning block (25). The outer wall of the fixed sleeve (6) is fixedly provided with a positioning sleeve (26). The outer wall of the positioning sleeve (26) is provided with a positioning hole (27). The positioning hole (27) is provided with multiple sets and abuts against each of the multiple sets of positioning blocks (25).

6. The drawing die fixing structure of a combined drawing machine according to claim 5, characterized in that: multiple sets Each of the positioning blocks (25) is fixedly provided with an abutment block (28) at its top, and multiple sets of abutment blocks (28) are slidably connected to multiple sets of mounting blocks (23).

7. The drawing die fixing structure of a combined drawing machine according to claim 6, characterized in that: The outer wall of the fixed sleeve (6) is provided with a limiting sleeve (29), the inner side of the limiting sleeve (29) abuts against multiple sets of abutting blocks (28), and a compression spring (30) is provided between the limiting sleeve (29) and the fixed sleeve (6).

8. The drawing die fixing structure of a combined drawing machine according to claim 7, characterized in that: The fixed sleeve (6) has an open movable groove (31) with multiple sets of movable grooves (31). Multiple sets of locking blocks (7) are rotatably installed in the movable grooves (31). The top surfaces of the multiple sets of locking blocks (7) are all arc-shaped and are slidably connected to the multiple sets of movable grooves (31).

Images