Composite cold extrusion steering yoke die with long female shaft hole

Abstract

The utility model relates to the field of stamping dies, in particular to a composite cold extrusion steering yoke die with a long female shaft hole, which comprises a base and a punch, a lower die hole is arranged on the base, an extrusion column and a floating block are arranged on the punch, the extrusion column is fixedly connected with the punch, and the floating block is fixedly connected with the lower die hole. The extrusion column is arranged in the lower die hole, the central axis of the extrusion column coincides with the central axis of the lower die hole, the floating block is connected with the punch in a sliding mode, an upper die hole is formed in the floating block, the upper die hole corresponds to the lower die hole, and the punch penetrates through the upper die hole. Through the arrangement of the floating block, the extrusion column, the upper die hole and the lower die hole, a cylindrical raw material can be vertically extruded to form a fork-shaped structure on the cylindrical raw material, so that unqualified products caused by uneven stress possibly caused by contact between the side wall of the cylindrical raw material and the extrusion column are avoided, and the yield is improved.

Description

Technical Field

[0001] The utility model relates to the field of stamping dies, in particular to a composite cold extrusion steering yoke die with a relatively long mother shaft hole. Background Art

[0002] Cold extrusion is a common cold forging technology, which mainly utilizes the ductility of metals and applies pressure to the materials to fill the metal materials into the mold or change the original shape of the metal materials. However, the existing stamping for fork-shaped structures with a hollow middle part often uses a long mother shaft and a head yoke to be separately forged and formed separately, and then the two parts are welded together. This greatly reduces the overall structural strength, and the force applied by the punch is uneven when in contact with the cylindrical surface, so it is very difficult to stamp the fork-shaped structure of cylindrical materials; and the closed positive extrusion using the punch to directly leave the fork-shaped part of the head in the lower die cavity increases the difficulty of metal material filling the entire lower die cavity, which is easy to form a suffocation phenomenon, resulting in a short die life.

[0003] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a composite cold extrusion steering yoke die with a longer mother shaft hole. The utility model is achieved through the following technical solutions:

[0005] A composite cold extrusion steering yoke die with a longer mother shaft hole comprises a base and a punch, wherein the base is provided with a lower die hole, the punch is provided with an extrusion column and a floating block, the extrusion column is fixedly connected to the punch, and the central axis of the extrusion column coincides with the central axis of the lower die hole, the floating block is slidably connected to the punch, the floating block is provided with an upper die hole, the upper die hole corresponds to the lower die hole, and the punch passes through the upper die hole.

[0006] In the above technical solution: the base is used to set up the remaining structure; the punch is used to set up part of the structure; the lower die hole is used to place the semi-finished product and cooperate with the upper die hole to form the semi-finished product; the extrusion column is used to extrude so that the semi-finished product is deformed to achieve plasticity; the floating block is used to make contact with the base in advance before the extrusion column and the finished product are extruded, so as to close the upper die hole and the lower die hole.

[0007] The utility model is further configured as follows: the base further comprises a lifting rod, the lifting rod is slidably arranged in the lower die hole, and the diameter of the lifting rod is consistent with the diameter of the lower die hole.

[0008] In the above technical solution: the lifting rod is used to push out the formed product.

[0009] The utility model is further configured as follows: a placement groove is provided on the punch, at least three nitrogen springs are fixedly arranged in the placement groove, and the output end of the nitrogen spring is connected to the floating block.

[0010] In the above technical solution: the nitrogen spring is used to realize the up and down movement and resetting of the floating block.

[0011] The utility model is further configured as follows: a clearance hole is provided at the bottom of the upper die hole, one end of the punch is fixedly connected to the bottom surface of the placement groove, and the other end passes through the clearance hole and extends into the upper die hole.

[0012] In the above technical solution: the clearance hole is used for the punch to pass through, so that the punch can transmit pressure without affecting the floating block.

[0013] The utility model is further configured as follows: the diameter of the clearance hole is consistent with the diameter of the extrusion column.

[0014] In the above technical solution: the diameter of the clearance hole is consistent with the diameter of the extrusion column, so that the extrusion column will not shake.

[0015] The utility model is further configured as follows: a limiting step is further provided on the side wall surface of the placement groove, a limiting flange is provided on the floating block, and the limiting step cooperates with the limiting flange to prevent the floating block from falling out of the placement groove.

[0016] In the above technical solution: the limiting step is used to limit the floating block from falling out of the placement groove.

[0017] The utility model discloses a composite cold extrusion steering yoke die with a longer mother shaft hole. Compared with the prior art:

[0018] 1. The utility model can vertically extrude the cylindrical raw material to form a fork-shaped structure on the cylindrical raw material by arranging the floating block, the extrusion column, the upper die hole and the lower die hole, thereby avoiding the unqualified product caused by the uneven force caused by the contact between the side wall of the cylindrical raw material and the extrusion column, thereby improving the yield rate;

[0019] 2. The utility model also sets a lifting rod, so that the metal material can be filled into the upper die cavity when the yoke is reversely extruded, so that the upper and lower die cavities both contain the fork-shaped part of the head, thereby evenly distributing the extrusion forming force to the upper and lower dies, and completing a composite extrusion when the cold forging machine reaches the bottom dead point. After the three-needle feeder is set, the product is lifted up for easy removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the utility model;

[0021] Figure 2It is a partial enlarged view of the utility model.

[0022] The corresponding component names represented by the numbers and letters in the figure are: 10-base; 101-lower die hole; 102-lifting rod; 20-punch; 201-extrusion column; 202-floating block; 202a-upper die hole; 202b-allowance hole; 202c-limiting flange; 203-placing groove; 203a-limiting step; 30-nitrogen spring. DETAILED DESCRIPTION

[0023] The following is a detailed description of an embodiment of the utility model. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0024] like Figure 1-2 As shown, the utility model proposes a composite cold extrusion steering yoke die with a relatively long mother shaft hole, comprising a base 10 and a punch 20, wherein the base 10 is provided with a lower die hole 101, and the punch 20 is provided with an extrusion column 201 and a floating block 202, wherein the extrusion column 201 is fixedly connected to the punch 20, and the central axis of the extrusion column 201 coincides with the central axis of the lower die hole 101, and the floating block 202 is slidably connected to the punch 20, and an upper die hole 202a is provided on the floating block 202, wherein the upper die hole 202a corresponds to the lower die hole 101, and the punch 20 passes through the upper die hole 202a. The punch 20 comprises two profiles, and the two profiles are symmetrically arranged so that the inner surface of the formed fork-shaped structure is a plane; the diameter at the opening of the lower die hole 101 is consistent with the diameter at the opening of the upper die hole 202a.

[0025] like Figure 1-2 As shown, the utility model proposes a composite cold extrusion steering yoke die with a longer mother shaft hole, the base 10 also includes a lifting rod 102, the lifting rod 102 is slidably arranged in the lower die hole 101, and the diameter of the lifting rod 102 is consistent with the diameter of the lower die hole 101. Among them, the lifting rod 102 is provided with a connecting part, the diameter of the connecting part is smaller than the diameter of the lifting rod 102, and the diameter of the connecting part is consistent with the diameter of the bottom hole on the semi-finished product.

[0026] like Figure 1-2 As shown, the utility model proposes a composite cold extrusion steering yoke die with a relatively long female shaft hole, wherein the punch 20 is provided with a placement groove 203, wherein at least three nitrogen springs 30 are fixedly arranged in the placement groove 203, and the output end of the nitrogen spring 30 is connected to the floating block 202. The cross-sectional shape of the placement groove 203 is circular; and the single-curved springs are evenly arranged.

[0027] like Figure 1-2 As shown, the utility model proposes a composite cold extrusion steering yoke die with a longer mother shaft hole, and a clearance hole 202b is provided at the bottom of the upper die hole 202a, one end of the punch 20 is fixedly connected to the bottom surface of the placement groove 203, and the other end passes through the clearance hole 202b and extends into the upper die hole 202a.

[0028] like Figure 1-2 As shown, the utility model proposes a composite cold extrusion steering yoke die with a longer mother shaft hole, and the diameter of the clearance hole 202b is consistent with the diameter of the extrusion column 201.

[0029] like Figure 1-2 As shown, the utility model proposes a composite cold extrusion steering yoke die with a relatively long female shaft hole, a limiting step 203a is further provided on the side wall surface of the placement groove 203, a limiting flange 202c is provided on the floating block 202, and the limiting step 203a cooperates with the limiting flange 202c to prevent the floating block 202 from falling out of the placement groove 203. The major diameter of the limiting flange 202c is consistent with the diameter of the placement groove 203; the minor diameter of the limiting flange 202c is consistent with the minor diameter of the limiting step 203a.

[0030] The working principle of the utility model is:

[0031] a) Place the cylindrical finished product in the lower die groove;

[0032] b) connecting the ejector column to the bottom hole of the finished product;

[0033] c) Punch descends;

[0034] d) The floating block contacts the base first, and the nitrogen spring is compressed;

[0035] e) The upper die hole and the lower die hole are closed;

[0036] f) the extrusion column contacts the top of the cylindrical semi-finished product;

[0037] g) The semi-finished product is squeezed and deformed, filling into the upper die hole;

[0038] h) and becomes a fork shape under the obstruction of the extrusion column;

[0039] i) After forming, the lifting column rises to eject the product.

[0040] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A composite cold extrusion steering yoke die with a relatively long female shaft hole, characterized in that: The invention comprises a base (10) and a punch (20), wherein the base (10) is provided with a lower die hole (101), the punch (20) is provided with an extrusion column (201) and a floating block (202), the extrusion column (201) is fixedly connected to the punch (20), and the central axis of the extrusion column (201) coincides with the central axis of the lower die hole (101), the floating block (202) is slidably connected to the punch (20), the floating block (202) is provided with an upper die hole (202a), the upper die hole (202a) corresponds to the lower die hole (101), and the punch (20) passes through the upper die hole (202a).

2. A composite cold extrusion steering yoke die with a relatively long female shaft hole according to claim 1, characterized in that: The base (10) further comprises a lifting rod (102), wherein the lifting rod (102) is slidably disposed in the lower die hole (101), and the diameter of the lifting rod (102) is consistent with the diameter of the lower die hole (101).

3. A composite cold extrusion steering yoke die with a relatively long female shaft hole according to claim 2, characterized in that: The punch (20) is provided with a placement groove (203), in which at least three nitrogen springs (30) are fixedly arranged, and the output end of the nitrogen spring (30) is connected to the floating block (202).

4. The composite cold extrusion steering yoke die with a relatively long female shaft hole according to claim 3, characterized in that: A clearance hole (202b) is provided at the bottom of the upper die hole (202a); one end of the punch (20) is fixedly connected to the bottom surface of the placement groove (203), and the other end passes through the clearance hole (202b) and extends into the upper die hole (202a).

5. The composite cold extrusion steering yoke die with a relatively long female shaft hole according to claim 4, characterized in that: The diameter of the clearance hole (202b) is consistent with the diameter of the extrusion column (201).

6. The composite cold extrusion steering yoke die with a relatively long female shaft hole according to claim 5, characterized in that: A limiting step (203a) is also provided on the side wall surface of the placement groove (203), and a limiting flange (202c) is provided on the floating block (202), and the limiting step (203a) cooperates with the limiting flange (202c) to prevent the floating block (202) from falling out of the placement groove (203).

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