Powder metallurgy die with punch capable of being rapidly maintained

Abstract

The utility model relates to a powder metallurgy die with a punch capable of being rapidly maintained, which comprises an upper forming punch, the upper end face of the upper forming punch is a forming end face, a through hole is formed in the upper forming punch in an up-down penetrating mode, and a core rod is detachably installed in the through hole. The upper end of the core rod extends out of the forming end face to form a forming boss. According to the forming upper punch, some thin, long and easily-broken forming bosses are designed into a split type, if the forming bosses are broken, only the core rod needs to be taken out and replaced, the whole forming upper punch does not need to be maintained or replaced, the maintenance difficulty of workers is reduced, the production cost of enterprises is greatly reduced, meanwhile, the production efficiency is improved to a certain degree, and the production cost is reduced. Popularization and application are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy molds, in particular to a powder metallurgy mold with a punch capable of rapid maintenance. Background Art

[0002] Powder metallurgy is a process that uses metal or metal powder as raw material to manufacture metal materials, composites and various types of products through molding and sintering. The molding die is a key equipment in the production process of powder metallurgy products. Powder metallurgy iron powder is molded in the molding die by pressure. The size of the molded part guarantees the size of the finished part. Therefore, the molding punch is an important tool to ensure the accuracy of the product.

[0003] In the prior art, Figure 4 As shown, there are multiple forming bosses 5 protruding from the forming end face. Due to the thin and long bosses, the mold is very prone to breakage during use. Once one of them breaks, according to the normal one-piece mold design structure in the past, the entire upper punch can only be repaired or even scrapped, which will increase the maintenance cost for the company and affect the production efficiency. Utility Model Content

[0004] The utility model aims to solve one of the problems existing in the existing related technologies to at least a certain extent. To this end, the utility model provides a powder metallurgy die with a punch that can be quickly repaired.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A powder metallurgy die with a quickly repairable punch includes a forming upper punch, the upper end face of the forming upper punch being a forming end face, a through hole passing through the forming upper punch from top to bottom, a core rod being detachably installed in the through hole, and the upper end of the core rod extending out of the forming end face to form a forming boss.

[0007] In some embodiments, the lower end of the through hole is connected to a limiting groove, the limiting groove is coaxially arranged with the through hole and the diameter of the limiting groove is larger than the diameter of the through hole, the lower end of the core rod is provided with a connecting rod, the connecting rod is arranged in the limiting groove, and a pressure plate is installed at the lower end of the forming upper punch.

[0008] In some embodiments, the connecting rod is penetrated by through holes at the top and bottom for inserting the core rod, and a plurality of threaded countersunk holes connected to the through holes are symmetrically arranged on the outside of the connecting rod, and screws are threadedly connected in the threaded countersunk holes, and the threaded ends of the screws are tightened against the side walls of the core rod.

[0009] In some embodiments, the through holes and the core rods are arranged in multiple groups corresponding to each other.

[0010] In some embodiments, the core rod is made of tungsten carbide.

[0011] In some embodiments, the forming upper punch is made of SKH9 steel.

[0012] In some embodiments, the connecting rod is made of S45C steel.

[0013] Compared with the prior art, the beneficial effect of the present invention is that some thin, long and easily broken forming bosses are designed to be split, that is, through holes are passed through the upper and lower parts of the forming upper punch, and a core rod is detachably installed in the through hole, and the upper end of the core rod extends out of the forming end face to form a forming boss. If the forming boss is broken, only the core rod needs to be taken out and replaced, and the entire forming upper punch does not need to be repaired or replaced, which reduces the maintenance difficulty of the staff, greatly reduces the production cost of the enterprise, and at the same time improves the production efficiency to a certain extent, making it suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a top view of the upper punch for forming the present invention;

[0015] Figure 2 For this utility model Figure 1 AA cross-sectional view;

[0016] Figure 3 This is a schematic structural diagram of the core rod and the connecting rod of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure in which the forming boss and the upper punch are integrally formed in the prior art. DETAILED DESCRIPTION

[0018] The following detailed description provides various embodiments or examples for implementing the present invention. These are, of course, merely examples and are not intended to be limiting. Furthermore, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. This repetition is for simplicity and clarity in describing the present invention and does not imply a specific relationship between the various embodiments and / or configurations discussed.

[0019] like Figures 1-4 The powder metallurgy mold shown in the figure has a punch that can be quickly repaired, and includes a forming upper punch 1, the upper end face of the forming upper punch 1 is a forming end face 2, a through hole 3 is passed through the forming upper punch 1 from top to bottom, a core rod 4 is detachably installed in the through hole 3, and the upper end of the core rod 4 extends out of the forming end face 2 to form a forming boss 5.

[0020] In the present invention, some thin, long and easily broken forming bosses 5 are designed to be split, that is, a through hole 3 is passed through the upper and lower parts of the forming upper punch 1, and a core rod 4 is detachably installed in the through hole 3. The upper end of the core rod 4 extends out of the forming end face 2 to form a forming boss 5. If the forming boss 5 is broken, it is only necessary to take out the core rod 4 and replace it. There is no need to repair or replace the entire forming upper punch 1, which reduces the maintenance difficulty of the staff, greatly reduces the production cost of the enterprise, and at the same time improves the production efficiency to a certain extent, which is suitable for promotion and application.

[0021] Furthermore, the lower end of the through hole 3 is connected to a limiting groove 21, the limiting groove 21 is coaxially arranged with the through hole 3 and the diameter of the limiting groove 21 is larger than the diameter of the through hole 3, the lower end of the core rod 4 is provided with a connecting rod 22, the connecting rod 22 is arranged in the limiting groove 21, and a pressure plate 23 is installed at the lower end of the forming upper punch 1.

[0022] During installation, first, the core rod 4 is fixedly connected to the connecting rod 22, and then the core rod 4 is punched through the limiting groove 21 to penetrate into the through hole 3. When the connecting rod 22 is arranged in the limiting groove 21, the upper end of the core rod 4 extends out of the forming end face 2 to form a forming boss 5. Finally, the pressure plate 23 is fixedly installed on the lower end of the forming upper punch 1 by bolts, blocking the limiting groove 21, thereby fixing the connecting rod 22.

[0023] See also Figure 3 As shown, the connecting rod 22 is penetrated by a through hole 31 for inserting the core rod 4 at the top and bottom. A plurality of threaded countersunk holes 32 connected to the through hole 31 are symmetrically provided on the outside of the connecting rod 22. A screw 33 is threadedly connected in the threaded countersunk hole 32. The threaded end of the screw 33 is tightened on the side wall of the core rod 4. During installation, the core rod 4 is inserted into the through hole 31, then extended to the required length, and finally the screw 33 is locked. The core rod 4 is fixed by the screw 33. The structure is simple and the installation is convenient.

[0024] It is worth mentioning that the depth of the core rod 4 inserted into the through hole 31 can be adjusted according to the protruding height of the forming boss 5. In addition, when the forming boss 5 is broken, the upper end of the broken core rod 4 can also be processed so that it can be reused, reducing the maintenance cost.

[0025] In the present invention, multiple groups of through holes 3 and core rods 4 are correspondingly provided.

[0026] Furthermore, the core rod 4 is made of tungsten carbide, which has the characteristics of high hardness, high melting point, high wear resistance and high corrosion resistance.

[0027] Furthermore, the material of the forming upper punch 1 is SKH9 steel, which has relatively balanced wear resistance and leatherability. In particular, because it only increases or decreases the carbon content, the high-temperature characteristics are not damaged, and the properties of the steel can be continuously and significantly changed. It has rich hot and cold working plasticity, and is also good in machinability and grindability.

[0028] Furthermore, the connecting rod 22 is made of S45C steel, which has the main characteristics of high hardness, high strength, good plasticity and good welding performance.

[0029] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above in conjunction with the accompanying drawings. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy die with a punch capable of rapid maintenance, comprising a forming upper punch (1), wherein the upper end surface of the forming upper punch (1) is a forming end surface (2), and characterized in that: A through hole (3) is provided in the upper forming punch (1) and penetrates therethrough. A core rod (4) is detachably mounted in the through hole (3). The upper end of the core rod (4) extends out of the forming end surface (2) to form a forming boss (5).

2. The powder metallurgy die with a punch capable of rapid maintenance according to claim 1, characterized in that: The lower end of the through hole (3) is connected to a limiting groove (21), the limiting groove (21) is coaxially arranged with the through hole (3), and the diameter of the limiting groove (21) is larger than the diameter of the through hole (3), the lower end of the core rod (4) is provided with a connecting rod (22), and the connecting rod (22) is arranged in the limiting groove (21), and a pressing plate (23) is installed at the lower end of the forming upper punch (1).

3. The powder metallurgy die with a quickly repairable punch according to claim 2, characterized in that: The connecting rod (22) is penetrated by a through hole (31) for inserting the core rod (4) at the top and bottom. A plurality of threaded countersunk holes (32) connected to the through holes (31) are symmetrically arranged on the outside of the connecting rod (22). Screws (33) are connected to the inner threads of the threaded countersunk holes (32). The threaded ends of the screws (33) are pressed tightly against the side walls of the core rod (4).

4. The powder metallurgy die with a quickly repairable punch according to claim 1, characterized in that: The through holes (3) and the core rods (4) are arranged in multiple groups corresponding to each other.

5. A powder metallurgy die with a punch that can be quickly repaired according to any one of claims 1 to 4, characterized in that: The core rod (4) is made of tungsten carbide.

6. A powder metallurgy die with a punch that can be quickly repaired according to any one of claims 1 to 4, characterized in that: The material of the forming upper punch (1) is SKH9 steel.

7. The powder metallurgy die with a quickly repairable punch according to claim 2, characterized in that: The connecting rod (22) is made of S45C steel.

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