Forming die of shock absorber guider

Abstract

The utility model discloses a forming die of a shock absorber guider, which comprises a middle die, the axial position of the middle die is provided with a step hole in a penetrating way, the step hole comprises an upper forming hole and a lower forming hole, a step surface is formed between the inner wall of the upper forming hole and the inner wall of the lower forming hole, and the step surface is provided with a plurality of convex parts; the lower punching assembly comprises an inner lower punch and an outer lower punch; the upper punch assembly comprises an inner upper punch and an outer upper punch, and a forming surface is arranged at the lower end of the inner upper punch; the inner lower punch is arranged on the core rod in a sleeved mode, a forming column is arranged at the upper end of the core rod, and the inner upper punch is arranged on the forming column in a sleeved mode. According to the forming die for the guider of the shock absorber, the punching procedure is reduced, circulating holes in a formed guider body keep good consistency, the production efficiency is improved, and the finished product quality of the formed guider body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of guide manufacturing, in particular to a forming die for a shock absorber guide. Background Art

[0002] When a car passes over an uneven road, although the shock-absorbing spring in the shock-absorbing system can filter the vibration of the road, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this reciprocating spring jump. The structure of the shock absorber is that the piston rod with a piston is inserted into the cylinder, and the cylinder is filled with oil. There is a throttle hole on the piston so that the oil in the two parts of the space separated by the piston can complement each other. Among them, the guide is one of the important parts in the shock absorber. It plays a good guiding and sealing role for the movement of the piston rod in the shock absorber, ensuring the smoothness of the piston during operation, and no air or oil leakage.

[0003] In the prior art, the guide is usually an integrated structure. When manufacturing the guide, the guide and the through hole in the middle are formed by a forming mold. For example, the utility model patent with the announcement number CN203635901U discloses a guide mold, including an inner upper punch, an outer upper punch, a forming middle die, a lower punch, and a forming core rod; the outer upper punch is crimped on the upper part of the forming middle die, the inner upper punch is assembled through the axial position of the outer upper punch, the lower punch is installed at the lower part of the forming middle die, and the forming core rod is assembled through the axial position of the forming middle die. However, after the guide is formed, the radial flow hole that penetrates the guide is generally machined and drilled. In actual production, there may be defects such as burrs falling off and problems with inconsistent aperture sizes, which not only affect the installation accuracy of the guide, but also may reduce the service life and performance stability of the finished product. Utility Model Content

[0004] The purpose of the utility model is to design a forming mold for a shock absorber guide in order to solve the deficiencies of the above-mentioned technology, reduce the punching process, so that the flow holes on the guide body after molding maintain good consistency, improve production efficiency, and ensure the finished product quality of the guide body after molding.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a forming die of a shock absorber guide, comprising:

[0006] A middle die, wherein a step hole is provided through the axial position of the middle die, wherein the step hole comprises an upper forming hole and a lower forming hole which are coaxially arranged, wherein the inner diameter of the upper forming hole is larger than the inner diameter of the lower forming hole, and a step surface is formed between the inner wall of the upper forming hole and the inner wall of the lower forming hole, wherein a plurality of protrusions evenly distributed along an annular array are provided on the step surface, and the inner side wall of each protrusion matches the inner wall of the lower forming hole;

[0007] A lower punch assembly, the lower punch assembly comprising an inner lower punch and an outer lower punch coaxially arranged, the outer lower punch being sleeved on the inner lower punch, and the outer lower punch being press-connected to the inner wall of the lower forming hole;

[0008] An upper punch assembly, the upper punch assembly comprising an inner upper punch and an outer upper punch coaxially arranged, the outer upper punch being sleeved on the inner upper punch, the outer upper punch being press-connected to the inner wall of the upper forming hole, the lower end of the inner upper punch extending out of the outer upper punch and being provided with a forming surface that abuts against the inner side wall of the protrusion;

[0009] The inner lower punch is sleeved on the core rod, the upper end of the core rod extends out of the inner lower punch and is coaxially provided with a forming column, and the inner upper punch is sleeved on the forming column.

[0010] Preferably, the inner diameter of the inner upper punch is smaller than the inner diameter of the inner lower punch.

[0011] Preferably, the step surface is an inner conical surface.

[0012] Preferably, the lower end of the inner upper punch includes a punch column structure and a plurality of punch block structures uniformly arranged along the circumference of the punch column structure, the outer diameter of the punch column structure is smaller than the outer diameter of the inner upper punch, and the outer side wall of the punch block structure forms the molding surface.

[0013] Preferably, the punch column structure is integrally formed with each of the punch block structures, and the end surface edge of the punch column structure is a curved surface structure.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a forming die for a shock absorber guide. When the forming die is in use, a workpiece to be processed is placed on a stepped hole of a middle die, an upper punch assembly is pressed downward, and a lower punch assembly and a core rod are pressed upward, so as to directly die-cast a guide body. At the same time, the inner side walls of each protrusion respectively abut against and cooperate with each forming surface of the inner upper punch, so that the forming die forms each flow hole of the guide body when forming the guide body, thereby reducing the punching process, so that the flow holes on the formed guide body maintain good consistency, thereby improving production efficiency and ensuring the quality of the finished product of the formed guide body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the molding die in the embodiment;

[0017] Figure 2 is a cross-sectional view of the molding die in the embodiment Figure 1 ;

[0018] Figure 3 is a cross-sectional view of the molding die in the embodiment Figure 2 ;

[0019] Figure 4 It is a structural schematic diagram of the middle mold in the embodiment;

[0020] Figure 5 is a schematic structural diagram of a lower punch assembly and a core rod in an embodiment;

[0021] Figure 6 is a schematic structural diagram of an upper punch assembly in an embodiment;

[0022] Figure 7 It is a schematic diagram of the structure of the guide body formed by the forming mold in the embodiment.

[0023] In the figure: 1. middle die; 2. step hole; 21. upper forming hole; 22. lower forming hole; 3. step surface; 4. raised portion; 5. lower punch assembly; 51. inner lower punch; 52. outer lower punch; 6. upper punch assembly; 61. inner upper punch; 62. outer upper punch; 7. forming surface; 8. core rod; 801. forming column; 9. punch column structure; 10. punch block structure; 11. guide body; 1101. flow hole. DETAILED DESCRIPTION

[0024] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0025] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 A forming die for a shock absorber guide comprises a middle die 1, a lower punch assembly 5, an upper punch assembly 6 and a core rod 8. A step hole 2 is provided through the axial position of the middle die 1. The step hole 2 comprises an upper forming hole 21 and a lower forming hole 22 which are coaxially arranged. The inner diameter of the upper forming hole 21 is larger than the inner diameter of the lower forming hole 22. A step surface 3 is formed between the inner wall of the upper forming hole 21 and the inner wall of the lower forming hole 22. The step surface 3 is an inner conical surface. Four protrusions 4 evenly distributed along a ring array are provided on the step surface 3. The inner side wall of each protrusion 4 matches the inner wall of the lower forming hole 22.

[0026] refer to Figure 5 , Figure 6 The lower punch assembly 5 includes an inner lower punch 51 and an outer lower punch 52 which are coaxially arranged. The outer lower punch 52 is sleeved on the inner lower punch 51. The outer lower punch 52 is crimped on the inner wall of the lower forming hole 22. The end face edge of the inner lower punch 51 is a curved surface structure.

[0027] The upper punch assembly 6 includes an inner upper punch 61 and an outer upper punch 62 which are coaxially arranged. The outer upper punch 62 is sleeved on the inner upper punch 61, and the outer upper punch 62 is crimped on the inner wall of the upper forming hole 21. The lower end of the inner upper punch 61 extends out of the outer side of the outer upper punch 62, and the lower end of the inner upper punch 61 includes a punch column structure 9 and four punch block structures 10 evenly arranged along the circumference of the punch column structure 9. The outer diameter of the punch column structure 9 is smaller than the outer diameter of the inner upper punch 61. The inner wall of the punch column structure 9 cooperates with the inner wall of the inner upper punch 61. The punch column structure 9 is integrally formed with each punch block structure 10. The end face edge of the punch column structure 9 is a curved surface structure. The outer wall of the punch block structure 10 is formed with a forming surface 7, and each forming surface 7 is respectively in contact with the inner side wall of each protrusion 4.

[0028] The inner lower punch 51 is sleeved on the core rod 8 , the upper end of the core rod 8 extends out of the inner lower punch 51 and is coaxially provided with a forming column 801 , the inner upper punch 61 is sleeved on the forming column 801 , and the inner diameter of the inner upper punch 61 is smaller than the inner diameter of the inner lower punch 51 .

[0029] refer to Figures 1 to 7 When the molding die is in use, the workpiece to be processed is placed on the step hole 2 of the middle mold 1. The step surface 3 is an inner cone surface, and the inner cone surface can play a good positioning role for the workpiece during the molding process. When the workpiece is placed on the middle mold 1, the inner cone surface gradually fits with the outer surface of the workpiece, limiting the movement of the workpiece in multiple directions, ensuring the accurate position of the workpiece in the mold, thereby improving the molding accuracy and ensuring the size consistency of each part. After the workpiece is placed, the upper punch assembly 6 is pressed down, and the lower punch assembly 5 and the core rod 8 are pressed up. The upper end part of the molding column 801 of the core rod 8 cooperates with the inner wall sleeve of the inner upper punch 61, thereby die-casting the middle through hole of the guide body 11, the outer wall of the outer lower punch 52 is in conflict with the inner wall of the lower molding hole 22, the outer wall of the outer upper punch 62 is in conflict with the inner wall of the upper molding hole 21, the lower end of the inner upper punch 61 extends out of the lower end of the outer upper punch 62, and the punch column structure 9 at the lower end of the inner upper punch 61 is in conflict with the inner wall of the core rod 8. The mold column 801 is inserted and matched, thereby directly die-casting the guide body 11. At the same time, the inner side walls of each protrusion 4 respectively abut and cooperate with the molding surfaces 7 of the inner upper punch 61, so that the molding mold can form the flow holes 1101 of the guide body 11 when molding the guide body 11, reducing the punching process, so that the flow holes 1101 on the guide body 11 after molding maintain good consistency, improve production efficiency, and ensure the quality of the finished product of the guide body 11 after molding.

[0030] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A forming die for a shock absorber guide, characterized in that: include: A middle die (1), wherein a stepped hole (2) is provided through the axial position of the middle die (1), wherein the stepped hole (2) comprises an upper forming hole (21) and a lower forming hole (22) which are coaxially arranged, wherein the inner diameter of the upper forming hole (21) is larger than the inner diameter of the lower forming hole (22), and a stepped surface (3) is formed between the inner wall of the upper forming hole (21) and the inner wall of the lower forming hole (22), wherein a plurality of protrusions (4) evenly distributed along an annular array are provided on the stepped surface (3), and the inner side wall of each protrusion (4) matches the inner wall of the lower forming hole (22); A lower punch assembly (5), the lower punch assembly (5) comprising an inner lower punch (51) and an outer lower punch (52) which are coaxially arranged, the outer lower punch (52) being sleeved on the inner lower punch (51), and the outer lower punch (52) being pressed against the inner wall of the lower forming hole (22); An upper punch assembly (6), the upper punch assembly (6) comprising an inner upper punch (61) and an outer upper punch (62) which are coaxially arranged, the outer upper punch (62) being sleeved on the inner upper punch (61), the outer upper punch (62) being crimped onto the inner wall of the upper forming hole (21), the lower end of the inner upper punch (61) extending out of the outer upper punch (62) and being provided with a forming surface (7) which abuts against the inner side wall of the protruding portion (4); A core rod (8), the inner lower punch (51) is sleeved on the core rod (8), the upper end of the core rod (8) extends out of the inner lower punch (51) and is coaxially provided with a forming column (801), and the inner upper punch (61) is sleeved on the forming column (801).

2. The forming die of the shock absorber guide according to claim 1, characterized in that: The inner diameter of the inner upper punch (61) is smaller than the inner diameter of the inner lower punch (51).

3. The forming die of the shock absorber guide according to claim 1, characterized in that: The step surface (3) is an inner conical surface.

4. The forming die of the shock absorber guide according to claim 1, characterized in that: The lower end of the inner upper punch (61) comprises a punch column structure (9) and a plurality of punch block structures (10) uniformly arranged along the circumference of the punch column structure (9); the outer diameter of the punch column structure (9) is smaller than the outer diameter of the inner upper punch (61); and the outer side wall of the punch block structure (10) is formed with the forming surface (7).

5. The forming die of the shock absorber guide according to claim 4, characterized in that: The punch column structure (9) and each punch block structure (10) are integrally formed, and the end face edge of the punch column structure (9) is a curved surface structure.

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