Wire stranding die

Abstract

The utility model relates to the technical field of cable processing, and provides a wire stranding die which is provided with a through hole for a lead to pass through, one end of the through hole is a wire inlet, and the other end of the through hole is a wire outlet; the die comprises a wire inlet section, a pre-deformation section, a deformation diameter bearing section and a wire outlet section. The wire inlet section faces the wire inlet, the wire outlet section faces the wire outlet, and the wire inlet section, the pre-deformation section, the deformation diameter bearing section and the wire outlet section are sequentially connected; the inner wall of the line segment is horn-shaped, the big end of the horn-shaped opening faces the line inlet, and the inner wall of the horn-shaped opening is a straight line segment; the inner wall of the pre-deformation section is in an arc shape, and the two sides of the pre-deformation section are in smooth transition with the line inlet section and the deformation diameter bearing section respectively. The inner wall of the deformation diameter bearing section is a linear section, and the linear section is parallel to the central axis of the through hole. According to the wire stranding die provided by the utility model, the resistance entering the deformation diameter-bearing section is reduced, the stress concentration of the wire is reduced, the wire can be fully plastically deformed at the deformation diameter-bearing section especially during high-speed wire stranding, and the forming quality of the wire is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable processing, in particular to a stranding die. Background Art

[0002] The stranding die is an important tool used in the production of electric wires and cables, mainly for stranding and compacting cable conductors. Multiple conductors of the cable enter the stranding die and are stranded into a unified single conductor for output. During high-speed stranding, when the stranding speed exceeds a certain value, it will cause insufficient plastic deformation degree of the compacted conductors, affecting the quality of the cable. Summary of the Utility Model

[0003] The utility model provides a stranding die to solve the problem that during high-speed stranding in the prior art, the plastic deformation degree of the compacted conductors is insufficient, thus affecting the quality of the cable.

[0004] The utility model provides a stranding die, which is provided with a through hole for the conductor to pass through. One end of the through hole is an inlet, and the other end is an outlet;

[0005] The die includes an inlet section, a pre-deformation section, a deformation bearing diameter section and an outlet section;

[0006] The inlet section faces the inlet, the outlet section faces the outlet, and the inlet section, the pre-deformation section, the deformation bearing diameter section and the outlet section are connected in sequence;

[0007] The inner wall of the inlet section is in the shape of a flared mouth. The large end of the flared mouth faces the inlet, and the inner wall of the flared mouth is a straight section;

[0008] The inner wall of the pre-deformation section is arc-shaped, and both sides of the pre-deformation section are smoothly transitioned with the inlet section and the deformation bearing diameter section respectively;

[0009] The inner wall of the deformation bearing diameter section is a straight section, and the straight section is arranged parallel to the central axis of the through hole;

[0010] Wherein, the arc-shaped inner wall of the pre-deformation section can smoothly pre-extrude multiple conductors, reduce the resistance of the conductors entering the deformation bearing diameter section, and reduce the stress concentration of the conductors; for the production process of high-speed stranding, the pre-deformation section can pre-compact the conductors. When the stranding speed of the conductors is relatively fast, the conductors can also be compacted in stages, so that the conductors can also undergo stable plastic deformation during high-speed stranding.

[0011] According to a stranding die provided by the utility model, the arc radius of the pre-deformation section is 25 mm to 34 mm;

[0012] The length of the pre-deformation section is 7 mm to 7.2 mm.

[0013] According to a wire stranding die provided by the present utility model, the die includes a body and a nano-coating;

[0014] The nano-coating is coated on a partial area of the inner wall of the body;

[0015] The inlet section, the pre-deformation section and the deformation bearing diameter section are all located in the area corresponding to the nano-coating;

[0016] The outlet section is located in the area corresponding to the body.

[0017] According to a wire stranding die provided by the present utility model, arc chamfers are provided at both ends of the through hole located in the nano-coating;

[0018] The arc chamfers are connected in a transitional manner with the area corresponding to the through hole and the body.

[0019] According to a wire stranding die provided by the present utility model, the interface between the nano-coating and the body is parallel to the outer side surface of the body;

[0020] The inner wall height of the interface between the nano-coating and the body is 2.5 to 3.5 times the inner wall height of the deformation bearing diameter section.

[0021] According to a wire stranding die provided by the present utility model, the inclination angle of the flare of the inlet section is 30°;

[0022] And / or, the inner wall of the outlet section is in the shape of a flare, the large end of the flare faces the outlet, and the inner wall of the flare is a straight section;

[0023] The inclination angle of the flare of the outlet section is 60°.

[0024] According to a wire stranding die provided by the present utility model, the length of the deformation bearing diameter section is 5.3 mm to 5.6 mm.

[0025] According to a wire stranding die provided by the present utility model, the die is a tungsten steel part.

[0026] According to a wire stranding die provided by the present utility model, the die is provided with a cooling cavity and a liquid inlet and a liquid outlet communicated with the cooling cavity.

[0027] According to a wire stranding die provided by the present utility model, the height of the cooling cavity does not exceed 1 / 3 of the height of the die.

[0028] The stranding die provided by the present utility model is provided with a pre-deformation section before the deformation bearing diameter section, and the inner wall of the pre-deformation section is smoothly transitioned by an arc inner wall, so that the wire is preliminarily deformed and compacted in the pre-deformation section and then sent into the deformation bearing diameter section, reducing the resistance to entering the deformation bearing diameter section and reducing the stress concentration of the wire. Especially during the high-speed stranding process, the wire can undergo sufficient plastic deformation in the deformation bearing diameter section, improving the forming quality of the wire. Brief Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a cross-sectional schematic diagram of the stranding die provided by the present utility model.

[0031] Reference Numerals:

[0032] 1, nano-coating; 2, body; 3, liquid inlet; 4, liquid outlet; 11, inlet section; 12, pre-deformation section; 13, deformation bearing diameter section; 21, outlet section;

[0033] 100, inlet port; 200, outlet port. Detailed Description of the Embodiments

[0034] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model with reference to the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0035] The following will be combined with Figure 1 , and the stranding die provided by the embodiments of the present utility model will be described in detail through specific embodiments and their application scenarios.

[0036] As Figure 1 shown, this embodiment provides a stranding die. The die is provided with a through hole for the wire to pass through. One end of the through hole is the inlet port 100, and the other end is the outlet port 200.

[0037] The stranding die includes an inlet section 11, a pre-deformation section 12, a deformation bearing diameter section 13, and an outlet section 21.

[0038] The inlet section 11 faces the inlet port 100, and the outlet section 21 faces the outlet port 200. The inlet section 11, the pre-deformation section 12, the deformation diameter-bearing section 13, and the outlet section 21 are connected in sequence.

[0039] The inner wall of the inlet section 11 is in the shape of a flared mouth, with the large end of the flared mouth facing the inlet port 100, and the inner wall of the flared mouth being a straight section.

[0040] The inner wall of the pre-deformation section 12 is arc-shaped, and both sides of the pre-deformation section 12 are smoothly transitioned with the inlet section 11 and the deformation diameter-bearing section 13 respectively.

[0041] The inner wall of the deformation diameter-bearing section 13 is a straight section, and the straight section is arranged parallel to the central axis of the through hole.

[0042] The wire passes through the through hole from the inlet port 100, is stranded and pressed tightly inside the through hole, and then passes out from the outlet port 200.

[0043] The inlet section 11 of the stranding die in this embodiment is used to guide the wire to pass through and enter the deformation diameter-bearing section 13 for tight stranding. The inner wall of the inlet section 11 is flared, with the large end facing the inlet port 100 and the small end facing the pre-deformation section 12. As the wire enters the inlet section 11 from the inlet port 100, the cross-sectional area of the through hole gradually shrinks, and the wires are gradually gathered during the movement, which is beneficial for the further operation of the pre-deformation section 12 on the wires. Moreover, the inner wall of the flared mouth is a straight section, which can reduce the deformation and wear of the wire when passing through the flared mouth, and is more convenient for replacement and maintenance.

[0044] The pre-deformation section 12 adopts a smooth transition with an arc-shaped inner wall, so that the wire passing through the inlet section 11 is initially deformed and pressed tightly, and then sent into the deformation diameter-bearing section 13 for further extrusion. Since the wire has undergone preliminary deformation in the pre-deformation section 12, the tight pressing of the wire in the stranding die can be carried out step by step in stages, and the wire bears a relatively small tight pressure in the pre-deformation section 12. The arc-shaped inner wall of the pre-deformation section 12 can perform smooth pre-extrusion on multiple wires, reduce the resistance of the wires entering the deformation diameter-bearing section 13, and reduce the stress concentration of the wires. The arc-shaped setting also helps to reduce the wrinkles and scratches on the surface of the wire and improve the forming quality of the wire. Further, since both sides of the pre-deformation section 12 are smoothly transitioned with the inlet section 11 and the deformation diameter-bearing section 13 respectively, it can reduce the wear of the stranding die and extend the service life of the stranding die. By optimizing and reducing stress concentration, the pre-deformation section 12 can improve production efficiency and reduce material waste. Moreover, the pre-deformation section 12 can also more precisely control the size of the wire, making the size of the wire entering the deformation diameter-bearing section 13 controllable. Especially for the production process of high-speed stranding, the pre-deformation section 12 can pre-press the wire, and when the stranding speed of the wire is relatively fast, it can also make the wire be pressed tightly in stages, so that the wire can undergo stable plastic deformation during high-speed stranding.

[0045] The deformed diameter-bearing section 13 is used to tightly twist multiple single wires together to form an integral body twisted in a certain direction and rule, so as to obtain a formed cable. The straight section is arranged parallel to the central axis of the through hole, enabling the wires to undergo stable plastic deformation in the deformed diameter-bearing section 13, thereby obtaining a cable with a preset outer diameter. The straight section helps the wires to be effectively extruded and shaped when passing through the stranding cavity, improving the quality and efficiency of stranding.

[0046] For the stranding die provided by the present utility model, a pre-deformation section 12 is arranged before the deformed diameter-bearing section 13, and the inner wall of the pre-deformation section 12 is smoothly transitioned with an arc-shaped inner wall. After the wires are preliminarily deformed and tightly pressed in the pre-deformation section 12, they are then sent into the deformed diameter-bearing section 13, reducing the resistance when entering the deformed diameter-bearing section 13 and reducing the stress concentration of the wires. Especially during the process of high-speed stranding, it enables the wires to undergo sufficient plastic deformation in the deformed diameter-bearing section 13, improving the forming quality of the wires.

[0047] As Figure 1 shown, the arc radius of the pre-deformation section 12 in this embodiment is 25 mm to 34 mm.

[0048] The length of the pre-deformation section 12 is 7 mm to 7.2 mm.

[0049] The arc radius R of the pre-deformation section 12 in this embodiment is 25 mm to 34 mm. Compared with the obtuse-angle guiding surface before entering the deformed diameter-bearing section 13 in the past, the arc surface in this embodiment is smoother for the preliminary pressing of the wires, avoiding damage to the wires caused by rigid contact.

[0050] The length L2 of the pre-deformation section 12 in this embodiment is 7 mm to 7.2 mm. As a transition section between the inlet section 11 and the deformed diameter-bearing section 13, the length of the pre-deformation section 12 can ensure that the wires are preliminarily tightly pressed without affecting the tight twisting of the wires by the deformed diameter-bearing section 13.

[0051] As Figure 1 shown, the stranding die of this embodiment includes a body 2 and a nano-coating 1.

[0052] The nano-coating 1 is coated on a partial area of the inner wall of the body 2.

[0053] The inlet section 11, the pre-deformation section 12, and the deformed diameter-bearing section 13 are all located in the area corresponding to the nano-coating 1.

[0054] The outlet section 21 is located in the area corresponding to the body 2.

[0055] In this embodiment, the inlet section 11, the pre-deformation section 12, and the deformed diameter-bearing section 13 are all coated with the nano-coating 1, and the outlet section 21 is not coated with the nano-coating 1 and is located in the area where the body 2 is located.

[0056] The hardness of the nano - coating 1 is relatively high, more than three times that of traditional steel, enhancing the wear resistance of the stranding die, reducing the time for maintaining and repairing the stranding die, and improving production efficiency. The nano - coating 1 is delicate and smooth, with a small friction coefficient with steel, which helps to improve the surface quality of the wire. Moreover, the nano - coating 1 is not easily sticky to the wire and can prevent chip accumulation. Setting the inlet section 11, pre - deformation section 12, and deformation bearing diameter section 13 that have extrusion or contact with the wire in the corresponding area of the nano - coating 1 can significantly improve the performance of the inlet section 11, pre - deformation section 12, and deformation bearing diameter section 13, extend the service life of the stranding die, and improve the product quality of wire stranding.

[0057] As Figure 1 shown, arc chamfers are provided at both ends of the through - hole of this embodiment located in the nano - coating 1.

[0058] The arc chamfers are transitionally connected to the area corresponding to the through - hole and the body 2.

[0059] Arc chamfers are provided at one end of the through - hole of this embodiment facing the inlet 100 of the inlet section 11 and at one end of the deformation bearing diameter section 13 facing the outlet section 21. When the wire enters and leaves the nano - coating 1, the arc surface of the arc chamfer has no sharp corners, so that the contact between the wire and the nano - coating 1 is smooth contact. The arc surface can guide the wire to safely enter or leave the nano - coating 1 and avoid damage to the wire caused by rigid flanges.

[0060] Specifically, the arc chamfer can have a fillet radius of 3 mm.

[0061] As Figure 1 shown, the interface between the nano - coating 1 and the body 2 of this embodiment is parallel to the outer side surface of the body 2.

[0062] The inner wall height of the interface between the nano - coating 1 and the body 2 is 2.5 - 3.5 times the inner wall height of the deformation bearing diameter section 13.

[0063] The cross - section of the body 2 of this embodiment is a regular strip - shaped structure. By controlling the size of the coating, the trumpet - shaped structure of the inlet section 11, the arc - shaped structure of the pre - deformation section 12, and the straight - line segment structure of the deformation bearing diameter section 13 are realized. Therefore, the interface between the nano - coating 1 and the body 2 is parallel to the outer side surface of the body 2 to facilitate the production of a regular body 2 structure.

[0064] The inner wall height of the interface between the nano - coating 1 and the body 2 of this embodiment is D, and the inner wall height of the deformation bearing diameter section 13 is d. . Since there are certain proportional requirements for the pressing and stranding of the wire, there is a multiple relationship between the height of the deformation bearing diameter section 13 and the inner wall height of the interface between the nano - coating 1 and the body 2, which can better control the pressing and stranding degree of the wire and is beneficial to controlling the stranding quality of the cable.

[0065] As shown Figure 1 in the figure, the inclination angle of the bell mouth of the incoming line segment 11 in this embodiment is 30°.

[0066] The inclination angle β of the bell mouth of the incoming line segment 11 in this embodiment is 30°, which is beneficial to the incoming operation of multiple wires and can guide the wires to enter the pre-deformation section 12.

[0067] As shown Figure 1 in the figure, the inner wall of the outgoing line segment 21 in this embodiment is in the shape of a bell mouth, the large end of the bell mouth faces the outgoing line port 200, and the inner wall of the bell mouth is a straight line segment.

[0068] The inclination angle of the bell mouth of the outgoing line segment 21 is 60°.

[0069] The outgoing line port 200 is in the shape of a bell, which can reduce the bending or breaking of the cable when leaving the stranding die, protect the cable from damage. And the bell shape can also reduce the friction between the cable and the stranding die when the cable is outgoing, and can guide the cable to smoothly exit from the stranding die, reducing the disorder or twist of the cable during the outgoing process.

[0070] Specifically, the inclination angle α of the bell mouth of the outgoing line segment 21 in this embodiment is 60°.

[0071] As shown Figure 1 in the figure, the length of the deformation bearing diameter section 13 in this embodiment is 5.3 mm to 5.6 mm.

[0072] The length L1 of the deformation bearing diameter section 13 in this embodiment is 5.3 mm to 5.6 mm. Inside the deformation bearing diameter section 13, the wires are further pressed and stranded. The deformation bearing diameter section of the previous die is usually about 4 mm. The length of the deformation bearing diameter section 13 in this embodiment is lengthened compared with the previous die to ensure that during high-speed stranding production, the effective residence time of the wires in the die is more than that of the original die, so as to ensure that the wires can undergo stable plastic deformation during pressing and stranding, thus ensuring the quality of wire stranding.

[0073] As shown Figure 1 in the figure, the stranding die in this embodiment is made of tungsten steel.

[0074] Tungsten steel has high hardness, good wear resistance, can withstand large mechanical loads and is not easy to break during the stranding process. And tungsten steel can also withstand high temperatures and is not easy to deform at high temperatures, having good adaptability to the temperature generated during the stranding process. Therefore, using tungsten steel to make the stranding die has high wear resistance and good temperature adaptability.

[0075] As shown Figure 1As shown in the figure, the stranding die of this embodiment is provided with a cooling cavity, an inlet 3 and an outlet 4 communicating with the cooling cavity.

[0076] The cooling cavity of this embodiment is arranged in a ring along the outer wall of the stranding die, and the coolant can circulate in the ring-shaped cooling cavity to continuously cool the ring structure of the stranding die.

[0077] Specifically, this embodiment further includes a coolant tank, an inlet pipe, an outlet pipe and a delivery pump. One end of the inlet pipe communicates with the inlet 3, and the other end of the inlet pipe communicates with the coolant tank. One end of the outlet pipe communicates with the outlet 4, and the other end of the outlet pipe communicates with the coolant tank. The delivery pump is installed on the inlet pipe, and the coolant is transported into the cooling cavity of the stranding die through the delivery pump, and the heat-exchanged coolant is sent back to the coolant tank. The coolant forms a cycle in the pipeline, continuously bringing the heat generated by the stranding die during the stranding process back to the coolant tank. Since the coolant is used to cool the stranding die during the stranding process, it can prevent the stranding die from being damaged due to excessive temperature, or the volume change caused by the thermal expansion and contraction of the stranding die from affecting the quality of the stranding, thereby ensuring the stability and reliability of the stranding die during the stranding process and ensuring the quality of the stranding.

[0078] Optionally, the coolant can be cooling water or ice brine.

[0079] As Figure 1 shown in the figure, the height of the cooling cavity of this embodiment does not exceed 1 / 3 of the height of the stranding die.

[0080] Since the stranding die includes a body 2 and a nano-coating 1, in order to avoid through holes and the nano-coating 1, the height of the cooling cavity is less than 1 / 3 of the height of the stranding die. The coolant in the cooling cavity exchanges heat with the body 2 to cool the body 2, so that the stranding die can perform high-speed stranding operations.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stranding die, characterized in that: The mold is provided with a through hole for the wire to pass through, one end of the through hole is a wire inlet, and the other end is a wire outlet; The mold includes an inlet section, a pre-deformation section, a deformation bearing section and an outlet section; The inlet section faces the inlet port, the outlet section faces the outlet port, and the inlet section, the pre-deformation section, the deformation bearing section and the outlet section are connected in sequence; The inner wall of the line inlet section is in a bell-mouth shape, the large end of the bell-mouth faces the line inlet, and the inner wall of the bell-mouth is a straight line segment; The inner wall of the pre-deformation section is in an arc shape, and the two sides of the pre-deformation section are smoothly transitioned to the line entry section and the deformation bearing diameter section respectively; The inner wall of the deformation bearing diameter section is a straight line section, and the straight line section is arranged parallel to the central axis of the through hole; Among them, the arc-shaped inner wall of the pre-deformation section can smoothly pre-extrude the multiple wires, reduce the resistance of the wires entering the deformation diameter-bearing section, and reduce the stress concentration of the wires; for the production process of high-speed stranded wires, the pre-deformation section can pre-tighten the wires, and when the stranding speed of the wires is fast, the wires can also be compacted in stages, so that the wires can also undergo stable plastic deformation during high-speed stranding.

2. The stranding die according to claim 1, characterized in that: The arc radius of the pre-deformation section is 25 mm to 34 mm; The length of the pre-deformation section is 7 mm to 7.2 mm.

3. The stranding die according to claim 1, characterized in that: The mold includes a body and a nano coating; The nano coating is applied to a partial area of ​​the inner wall of the body; The line entry section, the pre-deformation section and the deformation bearing section are all located in the area corresponding to the nano coating; The outlet line section is located in an area corresponding to the main body.

4. The stranding die according to claim 3, characterized in that: Both ends of the through hole located on the nano coating are provided with arc chamfers; The arc chamfer is transitionally connected to the area corresponding to the through hole and the body.

5. The stranding die according to claim 3, characterized in that: The interface between the nano coating and the body is parallel to the outer side surface of the body; The inner wall height of the interface between the nano coating and the body is 2.5 to 3.5 times the inner wall height of the deformation bearing diameter section.

6. The wire stranding die according to claim 1, characterized in that: The inclination angle of the bell mouth of the incoming line section is 30°; And / or, the inner wall of the line outlet segment is in a bell-mouth shape, the large end of the bell-mouth faces the line outlet, and the inner wall of the bell-mouth is a straight line segment; The inclination angle of the bell mouth of the outlet section is 60°.

7. The wire stranding die according to claim 1, characterized in that: The length of the deformation bearing diameter section is 5.3 mm to 5.6 mm.

8. The wire stranding die according to claim 1, characterized in that: The mold is a tungsten steel part.

9. The wire stranding die according to claim 1, characterized in that: The mold is provided with a cooling cavity and a liquid inlet and a liquid outlet communicated with the cooling cavity.

10. The wire stranding die according to claim 9, characterized in that: The height of the cooling cavity does not exceed 1 / 3 of the height of the mold.

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