Star-shaped sleeve reverse extrusion die

Abstract

The utility model discloses a reverse extrusion die for a starlike sleeve, which relates to the technical field of metal precision forging and comprises a base, a bearing plate is fixedly mounted at the top of the base through a support column, a guide sleeve is fixedly mounted on the inner side of the base, a stamping head is arranged in the guide sleeve, and a demoulding plate is arranged on one side, far away from the base, of the bearing plate. A connecting rod is fixedly installed at the bottom of the demolding plate, a lifting plate is fixedly installed at the end, penetrating through the bearing plate, of the connecting rod, and a female die is arranged on the side, away from the bearing plate, of the demolding plate. According to the reverse extrusion die for the starlike sleeve, the stamping head protrudes out of the guide sleeve, penetrates through the bearing plate and the demolding plate and then is located in the female die, reverse stamping molding of the starlike sleeve is completed in cooperation with the female die, and when demolding is needed, the height of the lifting plate is increased, so that the demolding effect is improved. The demolding plate connected through the connecting rod moves upwards in the state of being parallel to the bearing plate, and when the demolding plate is separated from the bearing plate, the starlike sleeve adhering to the stamping head is separated.

Description

Technical Field

[0001] The utility model relates to the technical field of metal precision forging, in particular to a star-shaped sleeve reverse extrusion die. Background Art

[0002] A star sleeve is a mechanical part that is usually used to connect and transmit rotary motion. It has a star-shaped structure with multiple joints (usually three to six) and a hollow center where another shaft or connector can be inserted.

[0003] A star-shaped sleeve reverse extrusion die is specifically designed for producing star-shaped sleeves and similarly shaped parts. The Chinese patent publication number CN205146915U discloses a star-shaped sleeve reverse extrusion die. This die utilizes a larger guide sleeve with a central opening for easy material removal, improving production efficiency and reducing costs. The extended guide sleeve also allows for high-precision extrusion, better balancing product wall thickness differences and significantly improving product quality.

[0004] It forms parts of complex shapes by making the material flow in the mold in a reverse manner. During production, the material is heated to a molten state, injected into the mold through a screw extruder, and then cooled and formed in the mold. However, due to the high pressure during hot melt stamping, the adhesion between the finished product and the punch head is too large, and the finished star sleeve sticks to the punch head after molding and is difficult to remove. Utility Model Content

[0005] In view of the problem that the above-mentioned existing device has a large pressure during hot melt stamping, which makes the adhesion between the finished product and the punching head too large, and the finished star-shaped sleeve is difficult to remove after being formed.

[0006] Therefore, the purpose of the present invention is to provide a star-shaped sleeve reverse extrusion die, the purpose of which is: the stripper plate connected by a connecting rod remains parallel to the supporting plate and moves upward, and when the stripper plate is separated from the supporting plate, the star-shaped sleeve stuck on the punching head is separated.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a star-shaped sleeve reverse extrusion die, comprising a base, a bearing plate fixedly mounted on the top of the base via a support, a guide sleeve fixedly mounted on the inner side of the base, a punch head provided in the guide sleeve, the punch head passing through one end of the guide sleeve and protruding from the bearing plate;

[0008] A stripping plate is provided on one side of the carrying plate away from the base, a connecting rod is fixedly installed on the bottom of the stripping plate, and a lifting plate is fixedly installed on one end of the connecting rod passing through the carrying plate, and the lifting plate is movably connected to the top of the base;

[0009] A concave die is provided on one side of the stripping plate away from the carrying plate, and the punching head passes through one end of the stripping plate and extends into the concave die.

[0010] As a preferred solution of the star-shaped sleeve back-extrusion die of the utility model, wherein: a lifting column is fixedly installed on the side of the lifting plate close to the base, one end of the lifting column extends into the base, and a deflection rod is provided on the side of the lifting column away from the lifting plate, the deflection rod is hinged in the base through a rotating shaft, and a foot pedal is fixedly installed on the side of the deflection rod away from the lifting column.

[0011] As a preferred solution of the star-shaped sleeve reverse extrusion die of the present invention, springs are provided on the outsides of the connecting rods, the springs are located between the bearing plate and the lifting plate, and correspond one to one with the connecting rods.

[0012] As a preferred solution of the star-shaped sleeve reverse extrusion die of the utility model, a limiting column is fixedly installed on one side of the stripping plate close to the supporting plate, and the limiting column is symmetrically distributed on both sides of the stripping plate, and one end extends into the supporting plate.

[0013] As a preferred solution of the star-shaped sleeve reverse extrusion die of the present invention, wherein: a punch sleeve is movably connected in the guide sleeve, and one end of the punch head located in the guide sleeve is fixedly connected to the punch sleeve.

[0014] As a preferred solution of the star-shaped sleeve reverse extrusion die of the present invention, an inner ring is provided on the inner side of the die, and one end of the punch protruding from the stripper plate is located in the inner ring.

[0015] As a preferred solution of the star-shaped sleeve reverse extrusion die of the utility model, wherein: the top of the die is respectively provided with a feeding plate and a top cover, the feeding plate is located between the die and the top cover, a partition shaft is fixedly installed on the bottom of the top cover, the partition shaft passes through one end of the feeding plate and is located in the die, and a feeding port is opened on the inner side of the top cover.

[0016] Beneficial effects of the utility model:

[0017] 1. The punch head protrudes from the guide sleeve and is located in the die after passing through the carrier plate and the stripper plate. It cooperates with the die to complete the reverse stamping and shaping of the star sleeve. When demoulding is required, the height of the lifting plate is increased so that the stripper plate connected by the connecting rod remains parallel to the carrier plate and moves upward. When the stripper plate is separated from the carrier plate, the star sleeve stuck on the punch head is separated.

[0018] 2. The extended spring pushes the lifting plate to move toward the side close to the base so that the stripping plate always keeps in contact with the load-bearing plate under the restriction of the limit column, and enters the load-bearing plate through the limit column, so that the stripping plate is not easy to loosen or deflect during the stamping process, so that good stability can be maintained when stamping or demoulding the star-shaped sleeve on the punch head.

[0019] 3. After the inner ring of the star-shaped sleeve outer ring is sealed by fitting the stripper plate and the die, the star-shaped sleeve is shaped by the punching head. When the star-shaped sleeve sticks to the inner ring, the pusher rod in the feeding port moves along the feeding port to remove the star-shaped sleeve stuck to the inner ring, thereby ensuring the smooth operation of the star-shaped sleeve shaping work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0021] Figure 1 It is a schematic diagram of the overall structure of the star-shaped sleeve reverse extrusion die of the present invention.

[0022] Figure 2 It is a schematic diagram of the explosion structure of the star-shaped sleeve reverse extrusion die of the utility model.

[0023] Figure 3 This is a schematic structural diagram of the supporting plate and stripping plate of the star-shaped sleeve reverse extrusion die of the utility model.

[0024] Figure 4 This is a schematic diagram of the related structures of the punch head and punch sleeve of the star-shaped sleeve reverse extrusion die of the present invention.

[0025] Figure 5 This is a schematic cross-sectional view of the structure of the die box and the material taking plate of the star-shaped sleeve reverse extrusion die of the present invention.

[0026] Description of reference numerals:

[0027] 1. Base; 2. Pillar; 3. Loading plate; 4. Guide sleeve; 5. Punch head; 6. Stripper plate; 7. Connecting rod; 8. Lifting plate; 9. Lifting column; 10. Deflection rod; 11. Rotating shaft; 12. Pedal; 13. Spring; 14. Limiting column; 15. Punch sleeve; 16. Die; 17. Inner ring; 18. Removal plate; 19. Top cover; 20. Partition shaft; 21. Removal port. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] Reference Figure 1-5 , which is the first embodiment of the present utility model, provides a star-shaped sleeve reverse extrusion die, which includes a base 1, a supporting plate 3 is fixedly installed on the top of the base 1 through a pillar 2, a guide sleeve 4 is fixedly installed on the inner side of the base 1, a punching head 5 is provided in the guide sleeve 4, and the punching head 5 passes through one end of the guide sleeve 4 and protrudes from the supporting plate 3, a stripping plate 6 is provided on the side of the supporting plate 3 away from the base 1, a connecting rod 7 is fixedly installed on the bottom of the stripping plate 6, and a lifting plate 8 is fixedly installed on one end of the connecting rod 7 passing through the supporting plate 3, and the lifting plate 8 is movably connected to the top of the base 1, and a concave die 16 is provided on the side of the stripping plate 6 away from the supporting plate 3. One end of the stripper plate 6 extends into the die 16. The supporting plate 3 provides support for the formed star-shaped sleeve through the pillar 2 and the base 1 when the device is in use. The punch head 5 can move in the guide sleeve 4 and, by protruding from the guide sleeve 4, reversely punch the star-shaped sleeve molten liquid on the stripper plate 6 to cooperate with the die 16 to complete the stamping of the sleeve. The stripper plate 6 is arranged parallel to the supporting plate 3 through the connecting rod 7 and fits with the supporting plate 3 when the device is stamping. The lifting plate 8 is arranged parallel to the stripper plate 6 through the connecting rod 7, and when the height of the lifting plate 8 is increased, the connected stripper plate 6 is separated from the supporting plate 3, and the star-shaped sleeve stuck on the punch head 5 is detached.

[0031] A lifting column 9 is fixedly installed on the side of the lifting plate 8 close to the base 1, and one end of the lifting column 9 extends into the base 1. A deflection rod 10 is provided on the side of the lifting column 9 away from the lifting plate 8. The deflection rod 10 is hinged in the base 1 through a rotating shaft 11, and a footrest 12 is fixedly installed on the side of the deflection rod 10 away from the lifting column 9. A groove that is adapted to the deflection rod 10 is provided at one end of the lifting column 9, so that the deflection rod 10 is always located under the restriction of the lifting column 9. When the deflection rod 10 deflects in the base 1, the rotating shaft 11 is used as the center of the circle. An anti-slip strip is provided on the footrest 12, and when the device is stamped, the side of the deflection rod 10 close to the footrest 12 tilts upward, so that the height of the footrest 12 is at the maximum value.

[0032] A spring 13 is provided on the outside of the connecting rod 7. The spring 13 is located between the supporting plate 3 and the lifting plate 8, and corresponds to the connecting rod 7 one by one. When the spring 13 is in an extended state, it pushes the lifting plate 8 to move toward the side close to the base 1, so that the stripping plate 6 is tightly fitted with the supporting plate 3.

[0033] A limiting column 14 is also fixedly installed on one side of the stripping plate 6 close to the supporting plate 3. The limiting columns 14 are symmetrically distributed on both sides of the stripping plate 6, and one end extends into the supporting plate 3. The stripping plate 6 can move in a state parallel to the supporting plate 3 under the restriction of the limiting columns 14, so that stability is maintained when the star-shaped sleeve on the punch head 5 is demolded.

[0034] A punch sleeve 15 is movably connected to the guide sleeve 4, and one end of the punch head 5 located in the guide sleeve 4 is fixedly connected to the punch sleeve 15. One end of the punch sleeve 15 is connected to a hydraulic push rod to provide punching power for the punch head 5, and the punch sleeve 15 moves in the groove in the guide sleeve 4, thereby avoiding position displacement of the punch head 5 during the punching process.

[0035] An inner ring 17 is provided on the inner side of the die 16, and one end of the punch head 5 protruding from the stripper plate 6 is located in the inner ring 17. The inner ring 17 is in the shape of the outer ring of the star sleeve. After the inner ring 17 is closed by the fitting of the stripper plate 6 and the die 16, the star sleeve is shaped by the punching of the punch head 5.

[0036] The top of the die 16 is respectively provided with a feeding plate 18 and a top cover 19. The feeding plate 18 is located between the die 16 and the top cover 19. A partition shaft 20 is fixedly installed on the bottom of the top cover 19. The partition shaft 20 passes through one end of the feeding plate 18 and is located in the die 16. A feeding port 21 is provided on the inner side of the top cover 19. The feeding plate 18 can follow the die 16 and the top cover 19 to move synchronously through the partition shaft 20, and fit together during stamping to ensure the airtightness of the star-shaped sleeve molten liquid transportation. A pushing rod can be provided in the feeding port 21. When the star-shaped sleeve sticks to the inner ring 17, the pushing rod moves along the feeding port 21 to remove the star-shaped sleeve stuck on the inner ring 17, thereby ensuring the smooth operation of the star-shaped sleeve shaping work.

[0037] When in use, the die 16 is moved close to one side of the stripping plate 6 to form a closed state, so that the supporting plate 3 provides support for the stripping plate 6, and the punch head 5 protrudes from the guide sleeve 4, and is located in the die 16 after passing through the supporting plate 3 and the stripping plate 6, and cooperates with the die 16 to complete the reverse stamping shaping of the star sleeve, and when demoulding is required, the height of the lifting plate 8 is increased, so that the stripping plate 6 connected by the connecting rod 7 remains parallel to the supporting plate 3 and moves upward, and when the stripping plate 6 is separated from the supporting plate 3, the star sleeve stuck on the punch head 5 is detached, and when the height of the lifting plate 8 is raised, it is necessary to step down on the pedal 12 to make the deflection rod 10 deflect in the base 1 with the rotating shaft 11 as the center of the circle, thereby lifting the lifting plate 8 connected to the lifting column 9 at the other end. During the stamping process, the stretched spring 13 pushes the lifting plate 8 to move to the side close to the base 1 to release the stripping plate 6. Under the restriction of the limiting column 14, the template 6 always keeps in contact with the supporting plate 3 and enters the supporting plate 3 through the limiting column 14, so that the stripping plate 6 is not easy to loosen or deviate during the stamping process, so that it can maintain good stability when stamping or demolding the star-shaped sleeve on the punch head 5. In this process, the feeding plate 18 follows the synchronous movement of the die 16 and the top cover 19 through the partition shaft 20, and fits together during stamping to ensure the airtightness of the star-shaped sleeve molten liquid transportation. After the inner ring 17 in the shape of the outer ring of the star-shaped sleeve is closed by the fitting of the stripping plate 6 and the die 16, the star sleeve is shaped by the punching of the punch head 5. When the star sleeve sticks to the inner ring 17, the pushing rod is moved along the feeding port 21 through the feeding port 21 to remove the star sleeve stuck on the inner ring 17, thereby ensuring the smooth operation of the star sleeve shaping work.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A star-shaped sleeve reverse extrusion die, comprising a base (1), characterized in that: A bearing plate (3) is fixedly mounted on the top of the base (1) via a support (2), a guide sleeve (4) is fixedly mounted on the inner side of the base (1), a punching head (5) is provided in the guide sleeve (4), and the punching head (5) passes through one end of the guide sleeve (4) and protrudes from the bearing plate (3); A stripping plate (6) is provided on one side of the bearing plate (3) away from the base (1); a connecting rod (7) is fixedly installed on the bottom of the stripping plate (6); a lifting plate (8) is fixedly installed on one end of the connecting rod (7) passing through the bearing plate (3); and the lifting plate (8) is movably connected to the top of the base (1); A die (16) is provided on the side of the stripper plate (6) away from the carrier plate (3), and the punch head (5) passes through one end of the stripper plate (6) and extends into the die (16).

2. A star-shaped sleeve reverse extrusion die according to claim 1, characterized in that: A lifting column (9) is fixedly mounted on the side of the lifting plate (8) close to the base (1), one end of the lifting column (9) extends into the base (1), a deflecting rod (10) is provided on the side of the lifting column (9) away from the lifting plate (8), the deflecting rod (10) is hinged to the base (1) via a rotating shaft (11), and a footrest (12) is fixedly mounted on the side of the deflecting rod (10) away from the lifting column (9).

3. A star-shaped sleeve reverse extrusion die according to claim 2, characterized in that: A spring (13) is provided on the outer side of each connecting rod (7). The spring (13) is located between the bearing plate (3) and the lifting plate (8) and corresponds to the connecting rod (7) one by one.

4. A star-shaped sleeve reverse extrusion die according to claim 3, characterized in that: A limiting column (14) is also fixedly mounted on one side of the stripping plate (6) close to the bearing plate (3). The limiting column (14) is symmetrically distributed on both sides of the stripping plate (6), and one end of the limiting column extends into the bearing plate (3).

5. The star-shaped sleeve reverse extrusion die according to claim 4, characterized in that: A punch sleeve (15) is movably connected to the guide sleeve (4), and one end of the punch head (5) located in the guide sleeve (4) is fixedly connected to the punch sleeve (15).

6. The star-shaped sleeve reverse extrusion die according to claim 1, characterized in that: An inner ring (17) is provided on the inner side of the die (16), and one end of the punch head (5) protruding from the stripper plate (6) is located in the inner ring (17).

7. The star-shaped sleeve reverse extrusion die according to claim 6, characterized in that: The top of the die (16) is provided with a feeding plate (18) and a top cover (19), respectively. The feeding plate (18) is located between the die (16) and the top cover (19). A partition shaft (20) is fixedly installed at the bottom of the top cover (19). One end of the partition shaft (20) passes through the feeding plate (18) and is located in the die (16). A feeding port (21) is opened on the inner side of the top cover (19).

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