High-precision guiding die special for automobile lane keeping

Abstract

The utility model discloses a kind of high-precision guiding die special for automobile wiring harness, it relates to automobile wiring harness processing technical field. Including die sleeve, die core and stepped die hole, die sleeve inner one end is provided with die core by thread, die sleeve and die core are provided with stepped die hole, die core adopts the polycrystal layer and tungsten steel layer of brazing inlay, the die hole is sequentially provided with horn into line port, straight line guide slot, conical guide slot and line outlet along wire feeding direction;Die sleeve other end outer wall is provided with positioning key groove. The utility model is through composite structure, stepped die hole, high -efficient heat dissipation and modularization design, solve the problem such as low precision, short life, poor compatibility of traditional guiding die.

Description

Technical Field

[0001] This utility model relates to the field of automotive wiring harness processing technology, specifically to a high-precision guide mold for automotive wiring harnesses. Background Technology

[0002] Automotive wiring harnesses form the core of a vehicle's electrical network. During manufacturing, they require precise guidance using a guide mold to ensure dimensional consistency and surface quality. Existing guide molds have the following drawbacks:

[0003] Insufficient structural stability: Traditional guide molds often use a single material or a simple splicing structure, which can easily lead to a decrease in guiding accuracy due to welding failure or mold sleeve wear after long-term use;

[0004] Difficulty in wire feeding: An unreasonable die inlet design can cause metal wire to get stuck when passing through the die, resulting in surface scratches or reduced processing efficiency;

[0005] Installation and debugging are cumbersome: the concentricity error between the die hole and the taper is large, requiring repeated adjustments during installation, and the wire shakes significantly during processing, affecting product accuracy;

[0006] Poor heat dissipation performance: During high-speed processing, the friction between the wire and the die hole generates heat. The accumulation of heat can easily lead to die hole deformation or wire annealing, affecting processing accuracy.

[0007] Insufficient compatibility: Traditional guide molds are only compatible with a single specification of wire. When changing the wire, the entire mold needs to be replaced, increasing production costs.

[0008] In summary, this utility model designs a high-precision guide mold specifically for automotive wiring harnesses. Utility Model Content

[0009] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a high-precision guide mold for automotive wiring harnesses. Through a composite structure, stepped die holes, efficient heat dissipation, and modular design, it solves the problems of low precision, short lifespan, and poor compatibility of traditional guide molds.

[0010] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-precision guide mold for automotive wiring harnesses, comprising a mold sleeve, a mold core, and a stepped mold hole. The mold core is threaded into one end of the mold sleeve, and the stepped mold hole is provided inside the mold sleeve and the mold core. The mold core is made of a polycrystalline layer and a tungsten steel layer brazed together. The mold hole is provided with a horn-shaped wire inlet, a straight guide groove, a conical guide groove, and a wire outlet in sequence along the wire feeding direction. A positioning keyway is provided on the outer wall of the other end of the mold sleeve.

[0011] Preferably, the outer wall taper of the mold sleeve 1 is 4.5-5.5°.

[0012] Preferably, the concentricity between the mold sleeve and the stepped mold hole is ≤0.01mm.

[0013] Preferably, the outer wall of the mold sleeve is provided with a spiral heat dissipation groove with a depth of 2-3mm and a pitch of 8-10mm. A graphene heat-conducting sheet with a thickness of 0.2mm is embedded in the groove.

[0014] Preferably, the polycrystalline layer, the tungsten steel layer, and the mold hole constitute a modular replaceable mold core. The mold core is connected to the mold steel mold sleeve through an M20×1.5 precision thread, which is suitable for wire diameters ranging from 0.5 to 5 mm.

[0015] Preferably, the spiral direction of the spiral heat dissipation groove is opposite to the wire feeding direction, and the groove is provided with a 0.5mm wide guide rib.

[0016] The beneficial effects of this utility model are:

[0017] 1. The mold steel sleeve and the polycrystalline tungsten steel composite layer are bonded together by copper welding, resulting in high bonding strength. The surface hardness of the mold sleeve reaches HRC58-62, improving wear resistance by 50% and extending service life to 2-3 times that of traditional molds.

[0018] 2. The stepped die hole design increases the wire threading speed by 40%, avoids jamming and scratches, and the straight section structure reduces die hole wear, with dimensional accuracy stably controlled within ±0.008mm;

[0019] 3. The high-precision concentricity design enables installation without adjustment, and the wire vibration amplitude during processing is ≤0.02mm. The pass rate of the produced automotive wiring harness products is increased to over 99.5%, meeting the precision processing requirements of high-end automotive wiring harnesses.

[0020] 4. The spiral heat dissipation grooves and graphene heat-conducting sheets work together to improve heat dissipation efficiency by 60%, prevent the die holes from deforming due to high temperature, and ensure the stability of continuous processing.

[0021] 5. The modular and interchangeable mold core design supports quick switching between 0.5-5mm wires, reducing mold replacement costs by 70% and adapting to multi-variety, small-batch production scenarios. Attached Figure Description

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1 The specific implementation adopts the following technical solution: a high-precision guide mold for automotive wiring harnesses, including a mold sleeve 1, a mold core 2, and a stepped mold hole. The mold core 2 is threaded into one end of the mold sleeve 1. The stepped mold hole is provided in both the mold sleeve 1 and the mold core 2. The mold core 2 is made of a polycrystalline layer 21 and a tungsten steel layer 22 with copper solder inlay. The mold hole is provided with a horn-shaped wire inlet 3, a straight guide groove 4, a conical guide groove 5, and a wire outlet 6 in sequence along the wire feeding direction. A positioning keyway 7 is provided on the outer wall of the other end of the mold sleeve 1.

[0026] It is worth noting that the outer wall taper of the mold sleeve 1 is 4.5-5.5°. The tapered structure design of the outer wall increases the contact area between the mold sleeve and the mounting base, improves the structural stability after assembly, and plays a guiding role during installation, which facilitates quick positioning, reduces concentricity error caused by installation deviation, ensures high-precision alignment between the mold hole and the spindle of the equipment, thereby reducing the vibration amplitude of the wire during processing and ensuring the processing accuracy of the wire harness.

[0027] It is worth noting that the concentricity between the mold sleeve 1 and the stepped mold hole is ≤0.01mm.

[0028] It is worth noting that the outer wall of the mold sleeve 1 is provided with a spiral heat dissipation groove with a depth of 2-3mm and a pitch of 8-10mm. Graphene heat-conducting sheets are embedded in the groove with a thickness of 0.2mm.

[0029] It is worth noting that the polycrystalline layer, tungsten steel layer and mold hole constitute a modular replaceable mold core. The mold core is connected to the mold steel mold sleeve through M20×1.5 precision thread, and is suitable for wire diameter range of 0.5-5mm.

[0030] In addition, the spiral direction of the spiral heat dissipation groove is opposite to the wire feeding direction, and the groove is provided with a 0.5mm wide guide rib.

[0031] This specific implementation consists of a mold steel sleeve, polycrystalline silicon, and tungsten carbide brazing inlay. The mold sleeve is made of mold steel, which has a hard surface that is not easily damaged. After grinding, the surface finish is good, and it better integrates with the taper inside the distributor. The use of polycrystalline silicon and tungsten carbide brazing inlay makes it more secure and prevents weld detachment. The mold hole is designed with a flared opening to facilitate the introduction of metal wires, and the straightness is used to control the stability of the mold hole size and increase the service life of the mold. By controlling the machining accuracy to ≤0.01 for the concentricity of the 5° taper and the mold hole, the mold can be installed without adjustment, the wire vibration during processing is reduced, and the quality of the produced automotive wiring harness products is guaranteed to be higher.

[0032] This specific implementation method solves the problems of low precision, short life and poor compatibility of traditional guide molds through composite structure, stepped mold holes, high-efficiency heat dissipation and modular design, and is suitable for precision machining scenarios of high-end automotive wiring harnesses (such as high-voltage wiring harnesses of new energy vehicles and autonomous driving signal lines).

[0033] 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 high-precision guide mold for automotive wiring harnesses, characterized in that: It includes a mold sleeve (1), a mold core (2) and a stepped mold hole. The mold core (2) is threaded into one end of the mold sleeve (1). The mold sleeve (1) and the mold core (2) are provided with stepped mold holes. The mold core (2) is made of a polycrystalline layer (21) and a tungsten steel layer (22) with copper solder inlay. The mold hole is provided with a horn-shaped wire inlet (3), a straight guide groove (4), a conical guide groove (5) and a wire outlet (6) in sequence along the wire feeding direction. The outer wall of the other end of the mold sleeve (1) is provided with a positioning keyway (7).

2. The high-precision guide mold for automotive wiring harnesses according to claim 1, characterized in that, The outer wall taper of the mold sleeve (1) is 4.5-5.5°.

3. The high-precision guide mold for automotive wiring harnesses according to claim 1, characterized in that, The concentricity of the mold sleeve (1) and the stepped mold hole is ≤0.01mm.

4. The high-precision guide mold for automotive wiring harnesses according to claim 1, characterized in that, The outer wall of the mold sleeve (1) is provided with a spiral heat dissipation groove with a depth of 2-3mm and a pitch of 8-10mm. A graphene heat-conducting sheet with a thickness of 0.2mm is embedded in the groove.

5. The high-precision guide mold for automotive wiring harnesses according to claim 1, characterized in that, The polycrystalline layer (21), tungsten steel layer (22) and mold hole constitute a modular replaceable mold core. The mold core is connected to the mold steel mold sleeve through M20×1.5 precision thread, and is suitable for wire diameter range of 0.5-5mm.

6. The high-precision guide mold for automotive wiring harnesses according to claim 4, characterized in that, The spiral direction of the spiral heat dissipation groove is opposite to the wire feeding direction, and the groove is provided with a 0.5mm wide guide rib.

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