Diamond tin-plating die for tin-plated wire

Abstract

The utility model discloses a tinned wire special diamond tinning mould, including mould cover, diamond mould core, sintered body and mould cover, the mould cover one side inner wall is established with annular embedding groove, sintered body outer wall and annular embedding groove interference fit, the mould cover is fixed with mould cover one end inner wall screw thread, and mould cover inner wall and sintered body end face abut tightly, diamond mould core sets up in the center of sintered body, and diamond mould core inside is mould hole, and the mould hole is provided with lubricating section, compression section and sizing section in proper order from entry end to export end, the compression angle of compression section is - degree, and compression section and sizing section are connected through arc transition. The utility model discloses through optimizing mould core material quality, pass design and assembly structure, improves mould precision, wear resistance and service life, guarantees the size accuracy and surface quality after tinned wire drawing.

Description

Technical Field

[0001] This utility model relates to the field of metal wire processing mold technology, specifically to a diamond tin plating mold for tin-plated wire. Background Technology

[0002] Existing tin-plating wire drawing dies are mostly made of cemented carbide, which suffers from insufficient wear resistance of the die core, surface scratches or dimensional inaccuracies due to unreasonable hole design during wire drawing, and poor stability of the die assembly structure, affecting service life and processing efficiency. To address these shortcomings, this invention proposes a high-precision, high-wear-resistant diamond tin-plating die specifically for tin-plating wire, thus overcoming the deficiencies of existing technologies. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a diamond tin-plating mold specifically for tin-plating wire. By optimizing the mold core material, hole design, and assembly structure, the mold's precision, wear resistance, and service life are improved, ensuring the dimensional accuracy and surface quality of the tin-plated wire after drawing.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a diamond tin plating mold for tin plating wire, comprising a mold sleeve, a diamond mold core, a sintered body, and a mold cover. An annular embedding groove is provided on one side of the inner wall of the mold sleeve. The outer wall of the sintered body is interference-fitted with the annular embedding groove. The mold cover is threaded to the inner wall of one end of the mold sleeve, and the inner wall of the mold cover abuts against the end face of the sintered body. The diamond mold core is located at the center of the sintered body. The interior of the diamond mold core is a mold hole. The mold hole is provided with a lubrication section, a compression section, and a sizing section in sequence from the inlet end to the outlet end. The compression angle of the compression section is -°. The compression section and the sizing section are connected by an arc transition.

[0005] Preferably, the length of the sizing section is 0.2-0.3 times the diameter of the wire.

[0006] Preferably, the diamond mold core is made of synthetic diamond with a surface finish of Ra0.02μm.

[0007] Preferably, the sintered body is a copper-based powder metallurgy ring structure, with its central mold core mounting hole and diamond mold core interference fit.

[0008] Preferably, the mold sleeve is a stainless steel mold sleeve.

[0009] Preferably, the outer wall of the mold sleeve is provided with anti-slip texture, the texture depth is 0.5-1mm and the width is 1-2mm.

[0010] Preferably, the end face of the mold cover is provided with an annular oil injection groove, which is filled with high-temperature resistant grease, and the oil injection groove is connected to the outer wall of the sintered body through a radial through hole.

[0011] The beneficial effects of this utility model are:

[0012] 1. The core is made of artificial diamond with a hardness of HV10000 or higher. Its wear resistance is 5-8 times higher than that of traditional cemented carbide cores. Combined with ultrasonic grinding and wire diameter polishing processes, the inner hole of the core has a surface finish of Ra0.02μm, which effectively avoids surface scratches during wire drawing.

[0013] 2. The compression section has an angle of 18°±1° and the sizing section has a 0.2-0.3D arc transition design, which is suitable for the soft characteristics of tin-plated wire, reduces the concentration of pulling stress, and ensures the dimensional accuracy of the wire (±0.001mm) and the surface finish (Ra ≤0.1μm).

[0014] 3. The sintered body and the mold sleeve are interference-fitted through an annular embedded groove, and the mold cover is pressed and fixed to the end face of the sintered body, forming a three-in-one embedded structure of "mold sleeve-sintered body-mold cover". The assembly gap is ≤0.002mm, which avoids the mold core displacement caused by vibration during mold operation and improves structural stability and service life. Attached Figure Description

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the mold hole of this utility model. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Reference Figure 1-2 The specific embodiment adopts the following technical solution: a diamond tin plating mold for tin plating wire, including a mold sleeve 1, a diamond mold core 2, a sintered body 3, and a mold cover 4. An annular embedding groove 5 is provided on one side of the inner wall of the mold sleeve 1. The outer wall of the sintered body 3 is interference-fitted with the annular embedding groove 5 to realize the embedding of the sintered body 3 with one side of the mold sleeve 1. The mold cover 4 is threaded to the inner wall of one end of the mold sleeve 1, and the inner wall of the mold cover 4 abuts against the end face of the sintered body 3 to realize the embedding of the mold cover 4 with the sintered body 3. The diamond mold core 2 is located at the center of the sintered body 3. The interior of the diamond mold core 2 is a mold hole 6. The mold hole 6 is provided with a lubrication section 8, a compression section 9, and a sizing section 10 in sequence from the inlet end to the outlet end. The compression angle of the compression section 9 is 17-19°. The compression section 9 and the sizing section 10 are connected by an arc transition.

[0020] It is worth noting that the length of the sizing section 10 is 0.2-0.3 times the diameter of the wire.

[0021] It is worth noting that the diamond mold core 2 is made of artificial diamond with a surface finish of Ra0.02μm.

[0022] It is worth noting that the sintered body 3 is a copper-based powder metallurgy ring structure, and its central mold core mounting hole is interference-fitted with the diamond mold core 2.

[0023] It is worth noting that the mold sleeve 1 is a stainless steel mold sleeve.

[0024] It is worth noting that the outer wall of the mold sleeve 1 is provided with anti-slip texture, the texture depth is 0.5-1mm and the width is 1-2mm.

[0025] In addition, the end face of the mold cover 4 is provided with an annular oil injection groove, which is filled with high-temperature resistant grease, and the oil injection groove is connected to the outer wall of the sintered body 3 through a radial through hole.

[0026] In this specific embodiment, during assembly, the sintered body 3 is first pressed into the annular embedding groove 5 of the die sleeve 1, then the diamond die core 2 is cooled and shrunk before being inserted into the die core mounting hole of the sintered body 3, and finally the die cover 4 is tightened to complete the fixation. During use, the tin-plated wire (made of T2 copper, 5mm in diameter) enters through the lubrication section 8 of the die hole 6, and is sequentially pulled out through the compression section 9 (the diameter is compressed from 5.0mm to 5.0mm, achieving micro-shaping through the compression angle) and the sizing section 10 (ensuring a final diameter of 5.000±0.001mm). During operation, the grease in the annular oil injection groove continuously penetrates into the interface between the die core and the wire through the radial through-hole, reducing the coefficient of friction to below 0.08. The high wear resistance (service life ≥ 100,000 pulls) and optimized hole design of the diamond die core 2 ensure that the tin-plated wire surface is free of scratches and indentations, achieving a surface finish of Ra0.08μm.

[0027] This specific embodiment utilizes an embedded combination structure of a stainless steel die sleeve, a synthetic diamond die core, and a copper-based sintered body, along with an 18° compression angle and a 0.3D sizing section design, to significantly improve the precision, wear resistance, and stability of the die. It is suitable for high-precision drawing of tin-plated wire with a diameter of 3-8mm.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A diamond tin plating mold for tin plating wire, characterized in that, The assembly includes a mold sleeve (1), a diamond mold core (2), a sintered body (3), and a mold cover (4). The inner wall of one side of the mold sleeve (1) is provided with an annular embedding groove (5). The outer wall of the sintered body (3) is press-fitted with the annular embedding groove (5). The mold cover (4) is threaded to the inner wall of one end of the mold sleeve (1), and the inner wall of the mold cover (4) is pressed against the end face of the sintered body (3). The diamond mold core (2) is located at the center of the sintered body (3). The interior of the diamond mold core (2) is a mold hole (6). The mold hole (6) is provided with a lubrication section (8), a compression section (9), and a sizing section (10) in sequence from the inlet end to the outlet end. The compression angle of the compression section (9) is 17-19°. The compression section (9) and the sizing section (10) are connected by a circular arc transition.

2. The diamond tin plating mold for tin plating wire according to claim 1, characterized in that, The length of the sizing section (10) is 0.2-0.3 times the diameter of the wire.

3. The diamond tin plating mold for tin plating wire according to claim 1, characterized in that, The diamond core (2) is made of artificial diamond and has a surface finish of Ra0.02μm.

4. The diamond tin plating mold for tin plating wire according to claim 1, characterized in that, The sintered body (3) is a copper-based powder metallurgy ring structure, with its central mold core mounting hole and diamond mold core (2) having an interference fit.

5. The diamond tin plating mold for tin plating wire according to claim 1, characterized in that, The mold sleeve (1) is a stainless steel mold sleeve.

6. The diamond tin plating mold for tin plating wire according to claim 1, characterized in that, The outer wall of the mold sleeve (1) is provided with anti-slip texture, the texture depth is 0.5-1mm and the width is 1-2mm.

7. The diamond tin plating mold for tin plating wire according to claim 1, characterized in that, The end face of the mold cover (4) is provided with an annular oil injection groove, which is filled with high temperature resistant grease, and the oil injection groove is connected to the outer wall of the sintered body (3) through a radial through hole.

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