Fastener positioning and forming die assembly

Abstract

The utility model relates to a fastener positioning and forming die assembly, which comprises a first-station die, a second-station die, a third-station die, a fourth-station die and a fifth-station die which are mutually replaced, a main die cavity of the third-station die is a combination of a round hole and a concave T-shaped block die cavity, the end of a punching die is in a conical opening shape, a positioning block blank is sealed in the punching die and the main die cavity, and the positioning block blank is sealed in the main die cavity. The positioning block blank is pushed into a T-shaped block die cavity of the main die cavity through a punching die punching needle, so that a T-shaped positioning block is formed on the end face of the positioning block blank; the end face of the stamping die upsets the end face of the positioning block blank, so that the positioning block blank is attached to the T block die cavity. According to the utility model, a cold forming continuous extrusion technology is adopted to replace a machining procedure.

Description

Technical Field

[0001] This utility model relates to the field of fastener manufacturing technology, specifically a fastener positioning and forming mold assembly. Background Technology

[0002] With the rapid development of modern manufacturing, especially in the automotive, aerospace, and electronic equipment industries, the demand for high-precision, high-strength, and lightweight parts is increasing. Traditional fastener processing methods are no longer sufficient to meet the requirements of efficient, low-cost, and high-quality production. Traditional fastener processing typically involves multiple steps such as casting, forging, and machining, which are not only complex and energy-intensive but also prone to material waste and environmental pollution.

[0003] As key components connecting mechanical structures, positioning fasteners directly affect the performance and safety of the entire system in terms of their accuracy, strength, and reliability. Traditional positioning fastener manufacturing often relies on machining methods such as turning, milling, and drilling. These processes are not only time-consuming but also prone to introducing problems such as stress concentration and dimensional deviations during manufacturing, affecting the fastener's performance.

[0004] In recent years, cold forming technology has been widely used in the fastener manufacturing industry due to its advantages such as high efficiency, energy saving, and environmental friendliness. Cold forming technology uses molds to plastically deform metal materials, achieving the required shape and size of parts without heating. This not only preserves the metal flow lines of the raw material and improves the strength and toughness of the parts, but also significantly reduces material waste and processing costs.

[0005] However, existing cold forming processes still present some challenges in the manufacturing of positioning fasteners. The conventional process involves cold heading to create a semi-finished product with pre-existing machining allowances, followed by machining to achieve the required precision. This method suffers from low material utilization, poor performance stability, long machining times per piece, and low efficiency. For example, challenges include how to achieve efficient and stable automated production while ensuring fastener precision and strength; how to optimize mold design to reduce mold wear and improve production efficiency and product quality; and how to adjust cold forming process parameters to achieve optimal processing results for different material properties.

[0006] Therefore, it is necessary to develop a cold forming process technology for positioning fasteners, and achieve efficient, high-precision, and low-cost fastener production by optimizing mold design and adjusting process parameters. Summary of the Invention

[0007] The present invention aims to overcome the defects of the prior art and provide a fastener positioning and forming mold assembly to solve problems such as accurate positioning, optimized metal material flow, mold wear resistance and extended life in the cold forming process of positioning fasteners.

[0008] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0009] A fastener positioning and forming mold assembly includes five interchangeable molds: a first-station mold, a second-station mold, a third-station mold, a fourth-station mold, and a fifth-station mold. Each mold includes a punch, a punch located within the punch, a main mold, and an ejector pin with one end located within the main mold. A positioning block blank is placed within the cavity of the main mold. One end of the ejector pin abuts against the positioning block blank, and the punch presses the positioning block blank, causing the positioning block blank in the cavity of the main mold to be cold-forged into a workpiece. The five molds realize different stages of the cold-forging forming process.

[0010] The feature is that the three-station mold has a main mold cavity that is a combination of a round hole and an inwardly recessed T-block mold cavity, a punch end that is conical, and a positioning block blank that is enclosed in the punch and the main mold cavity. The positioning block blank is pushed into the T-block mold cavity of the main mold cavity by the punch punch, so that the end face of the positioning block blank forms a T-shaped positioning block.

[0011] The five-station mold has a die end face that upsets the end face of the positioning block blank, so that the positioning block blank fits into the T-block mold cavity.

[0012] The fastener positioning and forming mold assembly is characterized in that it further includes a transfer mechanism for automatically transferring materials, and each station mold is configured on a cold heading machine with a transfer mechanism.

[0013] The fastener positioning and forming mold assembly is characterized in that: the first-station mold, the second-station mold, the third-station mold, the fourth-station mold and the fifth-station mold are all made of cemented carbide.

[0014] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a fastener for use as a positioning fastener in passenger vehicles. The original process requires machining to ensure the product's shape and position tolerances. This application uses cold forming extrusion technology to design a cold heading mold assembly. This invention does not require other machining methods, and improves the stability of product quality, increases batch production efficiency, and greatly improves material utilization.

[0015] This application employs cold forming continuous extrusion technology to replace machining processes (machining 5 pieces / minute), achieving a material utilization rate of up to 98%. It significantly improves production efficiency (cold heading over 50 pieces / minute), and the product dimensions and mechanical properties are relatively stable. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of a three-station mold.

[0018] Figure 2This is a schematic diagram of a five-station mold.

[0019] Figure 3 This is a schematic diagram of the positioning block structure. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0021] like Figure 1-3 As shown: A fastener positioning and forming mold assembly includes five interchangeable molds: a first-station mold, a second-station mold, a third-station mold, a fourth-station mold, and a fifth-station mold. Each of the five molds includes a punch 1, a punch 2 located within the punch 1, a main mold 3, and an ejector pin 4 with one end located within the main mold. A positioning block blank 5 is disposed within the cavity of the main mold. One end of the ejector pin abuts against the positioning block blank, and the punch presses the positioning block blank, causing the positioning block blank located in the cavity of the main mold to be cold-forged into a workpiece. The five molds realize different stages of the cold-forging forming process.

[0022] The three-station mold has a main mold cavity that is a combination of a round hole and an inwardly recessed T-block mold cavity. The end of the punch is tapered. The positioning block blank is enclosed in the punch and the main mold cavity. The positioning block blank is pushed into the T-block mold cavity of the main mold cavity by the punch needle, so that the end face of the positioning block blank forms a T-shaped positioning block.

[0023] The five-station mold has a die end face that upsets the end face of the positioning block blank, so that the positioning block blank fits into the T-block mold cavity.

[0024] Furthermore, it also includes a transfer mechanism for automatically transferring materials, with each station mold mounted on a cold heading machine equipped with a transfer mechanism.

[0025] Furthermore, the first-station mold, second-station mold, third-station mold, fourth-station mold, and fifth-station mold are all made of cemented carbide.

[0026] The cold heading machine can reach a speed of 50 times per minute during product production, and no subsequent machining process is required.

[0027] This application, through its precise positioning design, ensures the accurate placement of the positioning fasteners during the cold forming process, thereby improving the precision and consistency of the product and meeting the needs of high-precision parts manufacturing.

[0028] This application reduces material waste and processing costs, improves the manufacturing quality and production efficiency of positioning fasteners, and lowers costs.

[0029] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fastener positioning and forming mold assembly, comprising a first-station mold, a second-station mold, a third-station mold, a fourth-station mold, and a fifth-station mold that are interchangeable with each other. Each of the five molds includes a punch, a punch located within the punch, a main mold, and an ejector pin with one end located within the main mold. A positioning block blank is disposed within the cavity of the main mold, one end of the ejector pin abuts against the positioning block blank, and the punch extrudes the positioning block blank, causing the positioning block blank located in the cavity of the main mold to be cold-forged into a workpiece. The five molds realize different stages of cold forging forming process. Its features are: The three-station mold has a main mold cavity that is a combination of a round hole and an inwardly recessed T-block mold cavity. The end of the punch is tapered. The positioning block blank is enclosed in the punch and the main mold cavity. The positioning block blank is pushed into the T-block mold cavity of the main mold cavity by the punch needle, so that the end face of the positioning block blank forms a T-shaped positioning block. The five-station mold has a die end face that upsets the end face of the positioning block blank, so that the positioning block blank fits into the T-block mold cavity.

2. The fastener positioning and forming mold assembly according to claim 1, characterized in that: It also includes a transfer mechanism for automatically transferring materials, with each station mold mounted on a cold heading machine equipped with the transfer mechanism.

3. The fastener positioning and forming mold assembly according to claim 1, characterized in that: The molds for the first, second, third, fourth, and fifth workstations are all made of cemented carbide.

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