Cold extrusion die for parking arm

Abstract

The utility model discloses a parking arm cold extrusion die which comprises an upper die and a lower die, an upper extrusion die rod protruding downwards is arranged at the lower end of the upper die, and the lower end face of the upper extrusion die rod is an extrusion forming face. The lower die comprises a die sleeve, a first extrusion die core and a second extrusion die core, after the first extrusion die core is connected to the die sleeve in a sleeving mode, a first-order extrusion lower die is formed, and after the second extrusion die core is connected to the die sleeve in a sleeving mode, a second-order extrusion lower die is formed; a through hole corresponding to the upper extrusion die rod is formed in the middle of each of the first extrusion die core and the second extrusion die core; each through hole consists of a forging stock feeding hole, a forging stock extrusion forming hole and a finished product blanking hole which are communicated with one another; the forging stock extrusion forming holes of the first extrusion die core and the second extrusion die core are vertical holes with the same vertical width, and the size of the forging stock extrusion forming hole of the first extrusion die core is larger than that of the forging stock extrusion forming hole of the second extrusion die core; and the shape and the size of a forging stock extrusion forming hole of the second extrusion die core are consistent with the design size of the parking arm.

Description

Technical Field

[0001] The utility model relates to the field of parking arm processing, in particular to a parking arm cold extrusion die. Background Art

[0002] The parking arm is an important part of the parking mechanism, and its processing accuracy and roughness have high requirements. The existing parking arm processing adopts rough forging and milling, which has low processing efficiency and requires the replacement of milling cutters every once in a while, which has high processing costs. At the same time, the surface profile and surface roughness of the working surface of the parking arm produced by the above processing method cannot meet the design requirements.

[0003] To solve the above problems, the Chinese patent application number 202010014149.0 discloses a parking arm manufacturing mold structure and manufacturing method, the mold structure includes an extrusion mold, the extrusion mold is arranged between a fixed mold sleeve and a vertically movable upper mold base, the extrusion mold has a cavity to be pressed and an extrusion working section that are connected up and down and pass through the extrusion mold; the extrusion mold is arranged on the mold sleeve, and the upper mold base is connected with an upper extrusion mold rod that can be inserted into the extrusion mold; a push rod that can be inserted into the extrusion mold is provided through the mold sleeve to extend to the cavity to be pressed for receiving materials when it is to be extruded, and the push rod is connected to a telescopic cylinder that drives its vertical movement to drop to the lower end of the extrusion working section during the extrusion process and provide back pressure; the extrusion mold includes two halves of the mold separated in half on the left and right, and the two halves of the mold can be slidably arranged on the mold sleeve for loading and unloading, and the cavity to be pressed and the extrusion working section are also processed in half on the two halves of the mold. The above invention extrude the forging billet after rough forging by cold extrusion to finally form the desired finished product. However, the extrusion die used is a two-piece die divided into left and right halves. Although it is convenient for cutting, it has a high production cost and requires high production precision. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a parking arm cold extrusion die to solve the problems that the existing parking arm extrusion die has a complex structure, high production cost, high production precision requirements, and is not easy to promote and maintain.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A parking arm cold extrusion die, comprising an upper die and a lower die, wherein a downwardly protruding upper extrusion die rod is provided at the lower end of the upper die, and the lower end surface of the upper extrusion die rod is an extrusion molding surface; the lower die comprises a die sleeve, a first extrusion die core and a second extrusion die core, wherein the first extrusion die core is sleeved on the die sleeve to form an extrusion first-order lower die, and the second extrusion die core is sleeved on the die sleeve to form an extrusion second-order lower die; a through hole corresponding to the upper extrusion die rod is provided in the middle of the first extrusion die core and the second extrusion die core, wherein the through hole is composed of a forging blank feeding hole, a forging blank extrusion molding hole and a finished product blanking hole which are interconnected ; The forging billet extrusion forming holes of the first extrusion die core and the second extrusion die core are both vertical holes with the same upper and lower widths, and the size of the forging billet extrusion forming hole of the first extrusion die core is larger than the size of the forging billet extrusion forming hole of the second extrusion die core, and the shape and size of the forging billet extrusion forming hole of the second extrusion die core are consistent with the design size of the parking arm; the forging billet feed holes of the first extrusion die core and the second extrusion die core and the finished product blanking holes of the first extrusion die core and the second extrusion die core have the same shape and size, wherein the forging billet feed hole is a feed hole that is wide at the top and narrow at the bottom, and the finished product blanking hole is a blanking hole that is narrow at the top and wide at the bottom. In this way, the extrusion die cores used are provided with two, which are used in the first extrusion sequence and the second extrusion sequence respectively. At the same time, the extrusion die core is divided into three sections, one end of the upper end is used to put in the forging billet, the middle section is used for extrusion molding, and the lower section is used for unloading after extrusion molding. The section for putting in the forging billet is wide at the top and narrow at the bottom, so that the size of the entrance is larger than the size of the forging billet, which is convenient for the forging billet to be put in; the size of the upper end of the blanking end is similar to the molding size, and the lower end gradually increases, so that it is convenient for the product to fall after molding. The billet extrusion molding hole is located in the middle, and the first extrusion die core is placed in the die sleeve in the first extrusion sequence to form the lower die of the first extrusion sequence, and the size of the billet extrusion molding hole of the first extrusion die core is larger than the size of the forging billet extrusion molding hole of the second extrusion die core, so that the forging billet is finally formed into a finished product after only two extrusions, and the size of the forging billet after the first extrusion is still slightly larger than the size of the finished product. This two-time extrusion method can meet the requirements of the roughness of the extruded end surface of the product. At the same time, the method of using two extrusion die cores for two extrusions can also meet the requirements of the extrusion accuracy of the parking arm.

[0007] Furthermore, the angle between the connecting line of the upper and lower ends of the forging billet feed hole and the extension line of the hole wall of the forging billet extrusion forming hole is 3-5 degrees. In this way, the inclination angle of the hole wall of the forging billet feed hole is small, which is convenient for the forging billet to be put in and for the forging billet to fall quickly to the middle forging billet extrusion forming hole.

[0008] Furthermore, the upper edge of the forging blank feeding hole is rounded, so that when the forging blank is put in, the edge is rounded and is not easy to be worn by the forging blank due to friction.

[0009] Furthermore, the angle between the connecting line of the upper and lower ends of the upper end of the finished blanking hole and the extension line of the hole wall of the forging blank extrusion forming hole is 2.5-3.5 degrees. In this way, after the forging blank is extruded, the hole wall of the blanking hole at the lower end of the extrusion section gradually increases, which is convenient for blanking.

[0010] Furthermore, a tapered hole is provided in the middle of the die sleeve, and the outer end surface of the first extrusion die core or the second extrusion die core matches the tapered hole. In this way, the setting of the tapered hole facilitates the matching of the extrusion die core and the die sleeve, so that the extrusion die core and the die sleeve match closely. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the upper die and the lower die of the extrusion sequence in the embodiment;

[0012] Figure 2 A bottom view of the upper die in the embodiment;

[0013] Figure 3 It is a structural schematic diagram of the second-order lower die for extrusion in the embodiment;

[0014] Figure 4 It is a forming profile diagram of the forging blank after two extrusions in the embodiment. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0016] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] like Figure 1-Figure 4As shown, the parking arm cold extrusion die provided in this embodiment comprises an upper die 1 and a lower die, wherein a downwardly protruding upper extrusion die rod 11 is provided at the lower end of the upper die 1, and the lower end surface of the upper extrusion die rod 11 is an extrusion molding surface; the lower die comprises a die sleeve 2, a first extrusion die core 3 and a second extrusion die core 4, wherein the first extrusion die core 3 is sleeved on the die sleeve 2 to form an extrusion first-order lower die, and the second extrusion die core 4 is sleeved on the die sleeve 2 to form an extrusion second-order lower die; a through hole 5 corresponding to the upper extrusion die rod 11 is provided in the middle of the first extrusion die core 3 and the second extrusion die core 4, wherein the through hole 5 is composed of a forging billet feeding hole 51, a forging billet extrusion molding hole 52 and a finished product drop hole which are interconnected. The forging blank extrusion forming hole 52 of the first extrusion die core 3 and the second extrusion die core 4 are both vertical holes with the same width from top to bottom, and the size of the forging blank extrusion forming hole 52 of the first extrusion die core 3 is larger than the size of the forging blank extrusion forming hole 52 of the second extrusion die core 4, and the shape and size of the forging blank extrusion forming hole 52 of the second extrusion die core 4 are consistent with the design size of the parking arm; the forging blank feed hole 51 of the first extrusion die core 3 and the second extrusion die core 4 and the finished product blanking hole of the first extrusion die core 3 and the second extrusion die core 4 are the same in shape and size, wherein the forging blank feed hole 51 is a feed hole that is wide at the top and narrow at the bottom, and the finished product blanking hole 53 is a blanking hole that is narrow at the top and wide at the bottom. In this way, the extrusion die cores used are provided with two, which are used in the first extrusion sequence and the second extrusion sequence respectively. At the same time, the extrusion die core is divided into three sections, one end of the upper end is used to put in the forging billet, the middle section is used for extrusion molding, and the lower section is used for unloading after extrusion molding. The section for putting in the forging billet is wide at the top and narrow at the bottom, so that the size of the entrance is larger than the size of the forging billet, which is convenient for the forging billet to be put in; the size of the upper end of the blanking end is similar to the molding size, and the lower end gradually increases, so that it is convenient for the product to fall after molding. The billet extrusion molding hole is located in the middle, and the first extrusion die core 3 is placed in the die sleeve 2 in the first extrusion sequence to form the lower die of the first extrusion sequence, and the size of the billet extrusion molding hole of the first extrusion die core 3 is larger than the size of the forging billet extrusion molding hole 52 of the second extrusion die core 4, so that the forging billet is finally formed into a finished product after only two extrusions, and the size of the forging billet after the first extrusion is still slightly larger than the size of the finished product. This two-time extrusion method can meet the requirements of the roughness of the extruded end surface of the product. At the same time, the method of using two extrusion die cores for two extrusions can also meet the requirements of the extrusion accuracy of the parking arm.

[0018] like Figure 4As shown, the extrusion process of the forging blank 6 of the parking arm in this embodiment includes: the first extrusion, first assembling the first extrusion die core 3 on the die sleeve 2, then placing the cut forging blank into the first extrusion die core 3, controlling the upper die 1 to move downward, and after the upper die 1 moves downward, the upper extrusion die rod 11 enters into the forging blank feed hole 51, and in the process of continuing to move downward, the lower end abuts against the forging blank 6, and the forging blank 6 is extruded into the forging blank extrusion forming hole 52, until the forging blank is extruded out of the forging blank extrusion forming hole 52, and then falls out of the lower die through the finished product drop hole 53. For the second extrusion, the second extrusion die core 4 is placed into the die sleeve 2 to form the second-order extrusion lower die. Then, after the forging billet extruded in the first order is placed into the second extrusion die core 4, the upper die 1 is controlled to move downward until the upper extrusion die rod 11 at the lower end of the upper die 1 enters the forging billet feed hole 51 and then abuts against the forging billet, and the forging billet is extruded into the forging billet extrusion forming hole 52 for the second extrusion, until the forging billet is extruded out of the forging billet extrusion forming hole 52, and the extruded finished product falls out of the lower die.

[0019] Furthermore, the angle between the connecting line of the upper and lower ends of the forging billet feeding hole 51 and the extension line of the hole wall of the forging billet extrusion forming hole 52 is 3-5 degrees. In this way, the inclination angle of the hole wall of the forging billet feeding hole 51 is small, which is convenient for the forging billet to be put in and for the forging billet to fall quickly to the forging billet extrusion forming hole 52 in the middle.

[0020] Furthermore, the upper edge of the forging blank feeding hole 51 is rounded, so that when the forging blank is put in, the edge is rounded and is not easy to be worn by the forging blank due to friction.

[0021] Furthermore, the angle between the connecting line of the upper and lower ends of the upper end of the finished blanking hole 53 and the extension line of the hole wall of the forging blank extrusion forming hole 52 is 2.5-3.5 degrees. In this way, after the forging blank is extruded, the hole wall of the blanking hole at the lower end of the extrusion section gradually increases, which is convenient for blanking.

[0022] Furthermore, a tapered hole is provided in the middle of the die sleeve 2, and the outer end surface of the first extrusion die core 3 or the second extrusion die core 4 matches the tapered hole. In this way, the setting of the tapered hole facilitates the matching of the extrusion die core and the die sleeve 2, so that the extrusion die core and the die sleeve 2 are closely matched.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A parking arm cold extrusion die, comprising an upper die and a lower die, wherein a downwardly protruding upper extrusion die rod is provided at the lower end of the upper die, and the lower end surface of the upper extrusion die rod is an extrusion molding surface; characterized in that: The lower die comprises a die sleeve, a first extrusion die core and a second extrusion die core, the first extrusion die core is sleeved on the die sleeve to form an extrusion first-order lower die, and the second extrusion die core is sleeved on the die sleeve to form an extrusion second-order lower die; a through hole corresponding to the upper extrusion die rod is provided in the middle of the first extrusion die core and the second extrusion die core, and the through hole consists of a forging billet feed hole, a forging billet extrusion forming hole and a finished product blanking hole that are interconnected; the forging billet extrusion forming holes of the first extrusion die core and the second extrusion die core are both vertical holes with the same upper and lower widths, and the size of the forging billet extrusion forming hole of the first extrusion die core is larger than the size of the forging billet extrusion forming hole of the second extrusion die core, and the shape and size of the forging billet extrusion forming hole of the second extrusion die core are consistent with the design size of the parking arm; the forging billet feed holes of the first extrusion die core and the second extrusion die core and the finished product blanking holes of the first extrusion die core and the second extrusion die core have the same appearance and size, wherein the forging billet feed hole is a feed hole that is wide at the top and narrow at the bottom, and the finished product blanking hole is a blanking hole that is narrow at the top and wide at the bottom.

2. The parking arm cold extrusion die according to claim 1, characterized in that: The angle between the connecting line of the upper and lower ends of the forging billet feeding hole and the extension line of the hole wall of the forging billet extrusion forming hole is 3-5°.

3. The parking arm cold extrusion die according to claim 1 or 2, characterized in that: The upper edge of the forging blank feeding hole is rounded.

4. The parking arm cold extrusion die according to claim 3, characterized in that: The angle between the connecting line of the upper and lower ends of the upper end of the blanking hole and the extension line of the hole wall of the forging blank extrusion forming hole is 2.5-3.5°.

5. The parking arm cold extrusion die according to claim 1, 2 or 4, characterized in that: A tapered hole is arranged in the middle of the die sleeve, and the outer end surface of the first extrusion die core or the second extrusion die core matches the tapered hole.

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