Cable drawing process

Abstract

The invention discloses a cable drawing process. The cable drawing process comprises the following steps: 1, preparing raw materials; 2, a wire drawing process; 3, wire drawing post-treatment is conducted, wire drawing equipment comprises a wire drawing roller fixed to the support and a driving belt wheel in transmission with the wire drawing roller through a transmission belt, and the driving belt wheel is fixed to the power output end of a motor set; the wire drawing roller comprises an outer sleeve, supporting cylinders rotationally arranged at the two ends of the outer sleeve through bearings, and a wire drawing die fixedly arranged in the outer sleeve. The roundness and burr treatment technological process is set in the wire drawing procedure, the roundness of the cable blank can be adjusted in the wire drawing process, and therefore the situation that after the wire drawing procedure is finished, reworking occurs due to the fact that the roundness of the cable blank does not meet the requirement is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of cable production, and in particular to a cable wire drawing process. Background Art

[0002] Cables need to be drawn during production. The cable blank is put into a wire drawing machine and processed by the wire drawing machine so that the cable meets the usage requirements. When drawing, wire drawing dies of different specifications are usually used to draw the blank. After wire drawing, post-processing processes are carried out to test and package the cables. However, when processing cables in existing cable drawing processes, their appearance is usually determined by the dies in the wire drawing machine. Since the cables have requirements for shape and roundness, and there is no special processing process for roundness during the wire drawing process, some cables are often reworked during the testing process because the roundness does not meet the standards. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cable wire drawing process.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A cable drawing process comprises the following steps:

[0006] The first step is to prepare raw materials: Material selection: According to the purpose and performance requirements of wires and cables, select appropriate copper or aluminum as raw materials; Material inspection: Inspect the raw materials to ensure that they meet national standards and requirements; Equipment inspection: Check whether the wire drawing machine, mold, lubrication system and other equipment are operating normally to ensure the stability and continuity of the production process;

[0007] The second step is the wire drawing process: Feeding: Feed the prepared raw materials into the feeding port of the wire drawing machine to ensure that the raw materials can enter the wire drawing machine smoothly and continuously; Wire drawing: Rough drawing: Perform preliminary stretching through a larger die hole to draw the raw materials into thicker wires; Medium and fine drawing: Stretch the material gradually through smaller die holes to draw the wire into the required diameter and shape; During this process, the wire will undergo multiple stretching and die extrusion, gradually become thinner and achieve the required dimensional accuracy and surface quality; Roundness and burr treatment: Put the thinned wire into the wire drawing equipment, turn on the wire drawing equipment, and use the wire drawing equipment to correct the roundness and remove burrs on the thinned wire;

[0008] The third step is wire drawing post-processing:

[0009] Cooling: The wire needs to be cooled after drawing to stabilize its structure and performance. The cooling method can be natural cooling or forced cooling, and the specific method depends on the production conditions and the performance requirements of the wire. Inspection: The wire after drawing is inspected, including inspections of diameter, shape, surface quality, etc. to ensure that the wire meets production requirements.

[0010] Preferably, in the second step, lubricants need to be used properly to reduce friction between metals, reduce heat and energy loss, and extend the service life of molds and equipment.

[0011] Preferably, in the second step, when processing the roundness and burrs, the material needs to be heated to 300°C-600°C before being put into the wire drawing equipment. By preheating the wire in advance, the roundness processing and burr processing process are facilitated.

[0012] Preferably, in the second step, during wire drawing, the temperature should be controlled within a certain range. A temperature that is too high will cause oxidation and deformation of the wire, while a temperature that is too low may not achieve the desired wire drawing effect.

[0013] Preferably, in the second step, when drawing the wire, the selection of the die of the wire drawing machine should be based on the specifications and performance requirements of the wire to ensure that the hole shape, size and precision of the die meet the production requirements.

[0014] The present invention has the following beneficial effects:

[0015] 1. The present invention sets a roundness and burr treatment process in the wire drawing process, so that the roundness of the cable blank can be adjusted during the wire drawing process, thereby preventing rework due to the cable blank roundness not meeting the requirements after the wire drawing process is completed.

[0016] 2. The wire drawing equipment provided in the present invention is used in the wire drawing process. The wire drawing drum is driven to rotate by the motor group so that the balls rotate with it. The cable blank passing through the processing cavity is squeezed by several groups of balls, so that the roundness of the cable blank meets the corresponding requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a process flow chart of the present invention;

[0018] Figure 2 A process flow chart for preparing raw materials in the cable drawing process of the present invention;

[0019] Figure 3 It is a process flow chart of the wire drawing process in the cable wire drawing process of the present invention;

[0020] Figure 4 This is a process flow chart of post-wire drawing processing in the cable wire drawing process of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the wire drawing equipment of the present invention;

[0022] Figure 6 It is a schematic diagram of the explosion structure of the wire drawing drum of the present invention;

[0023] Figure 7 It is a schematic diagram of the cross-sectional structure of the wire drawing drum of the present invention;

[0024] Figure 8 for Figure 7 A schematic diagram of the enlarged local structure in the middle.

[0025] In the figure: 1. drawing roller; 101. outer sleeve; 102. bearing; 103. support cylinder; 104. driven belt ring; 105. drawing die; 105a. fixed cylinder; 105b. outer mold; 105c. heat dissipation cavity; 105d. inner mold; 105e. inner mold cavity; 105e1. guide cavity; 105e2. buffer cavity; 105e3. processing cavity; 106. square cylinder; 107. support part; 108. elastic part; 109. block; 110. inner cavity; 111. ball; 112. opening; 2. bracket; 3. transmission belt; 4. driving pulley; 5. motor unit. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Example 1

[0028] Reference Figure 1-4 , a cable wire drawing process, the cable wire drawing process comprises the following steps:

[0029] The first step is to prepare the raw materials:

[0030] Material selection: Choose appropriate copper or aluminum as raw material according to the purpose and performance requirements of wires and cables;

[0031] Material inspection: inspect raw materials to ensure they meet national standards and requirements;

[0032] Equipment inspection: Check whether the wire drawing machine, die, lubrication system and other equipment are operating normally to ensure the stability and continuity of the production process;

[0033] The second step is wire drawing process:

[0034] Feeding: Feed the prepared raw materials into the feeding port of the wire drawing machine to ensure that the raw materials can enter the wire drawing machine smoothly and continuously;

[0035] Wire drawing: Rough drawing: preliminary drawing through a larger die hole to draw the raw material into a thicker wire; Medium drawing and fine drawing: the material is gradually drawn through smaller die holes to draw the wire into the required diameter and shape; in this process, the wire will undergo multiple stretching and die extrusion, gradually becoming thinner and achieving the required dimensional accuracy and surface quality;

[0036] Roundness and burr treatment: put the drawn wire into the wire drawing equipment, turn on the wire drawing equipment, and use the wire drawing equipment to trim the roundness and remove the burrs of the drawn wire;

[0037] The third step is wire drawing post-processing:

[0038] Cooling: The wire needs to be cooled after drawing to stabilize its structure and performance. The cooling method can be natural cooling or forced cooling, and the specific method depends on the production conditions and the performance requirements of the wire.

[0039] Inspection: The wire after drawing is inspected, including the diameter, shape, surface quality and other aspects to ensure that the wire meets the production requirements.

[0040] In this embodiment, in the second step, lubricants need to be used reasonably to reduce friction between metals, reduce heat and energy loss, and extend the service life of molds and equipment.

[0041] In this embodiment, in the second step, when processing the roundness and burrs, the material needs to be heated to 300°C-600°C before being put into the wire drawing equipment.

[0042] In this embodiment, in the second step, during wire drawing, the temperature should be controlled within a certain range. If it is too high, the wire will be oxidized and deformed, while if it is too low, the expected wire drawing effect may not be achieved.

[0043] In this embodiment, in the second step, when drawing the wire, the selection of the die of the wire drawing machine should be based on the specifications and performance requirements of the wire to ensure that the hole shape, size and precision of the die meet the production requirements.

[0044] In the wire drawing process, adding roundness and burr treatment technology can ensure the roundness of the wire after the wire drawing process and remove burrs, thereby preventing the wire from having insufficient roundness or excessive burrs after the wire drawing process.

[0045] Example 2

[0046] Reference Figure 5-8 , a cable drawing device, comprising a drawing drum 1 fixed on a bracket 2 and a driving pulley 4 driven by the drawing drum 1 through a transmission belt 3, wherein the driving pulley 4 is fixed to a power output end of a motor group 5;

[0047] The wire drawing drum 1 comprises an outer sleeve 101, a support sleeve 103 rotatably arranged at both ends of the outer sleeve 101 through bearings 102, and a wire drawing die 105 fixedly arranged inside the outer sleeve 101;

[0048] It also includes a square cylinder 106 inserted into the surface of the wire drawing die 105 and extending to the inside of the wire drawing die 105, a support portion 107 is fixed in the square cylinder 106, the support portion 107 is elastically connected to a block 109 through an elastic member 108, an inner cavity 110 is opened on the block 109, a ball 111 is arranged in the inner cavity 110, and the ball 111 is placed in the inner cavity 110 and can rotate.

[0049] In this embodiment, the wire drawing die 105 includes a fixed cylinder 105a, an outer die 105b is sleeved inside the fixed cylinder 105a, and an inner die 105d is fixed inside the outer die 105b.

[0050] In this embodiment, a heat dissipation cavity 105c is provided between the outer mold 105b and the inner mold 105d, and the outer mold 105b and the fixing tube 105a are made of metal material with strong heat conduction capability.

[0051] In this embodiment, an inner mold cavity 105e is formed inside the inner mold 105d. The inner mold cavity 105e is a symmetrical structure. The inner mold cavity 105e includes a guide cavity 105e1 arranged at both ends, a buffer cavity 105e2 in the middle position, and a processing cavity 105e3 located between the two buffer cavities 105e2.

[0052] In this embodiment, a plurality of openings 112 are formed on the surface of the inner mold 105d close to the processing cavity 105e3, and the balls 111 pass through the openings 112 and are placed in the processing cavity 105e3.

[0053] In this embodiment, a driven belt loop 104 is provided on the outer sleeve 101 , and the driven belt loop 104 and the transmission belt 3 match each other.

[0054] The cable wire is passed through the inner mold cavity 105e, and the motor group 5 drives the wire drawing roller 1 to rotate, and the wire drawing roller 1 drives the wire drawing die 105 to rotate, and the wire drawing die 105 drives the square cylinder 106 to rotate. At the same time, the ball 111 on the square cylinder 106 starts to rotate. When the ball 111 contacts the wire, the rotating ball 111 will apply pressure to the surface of the wire under the action of the elastic member 108. When the roundness of the wire is not enough, several rotating balls 111 squeeze the wire, so as to process the wire into a circle. When there are burrs on the surface of the wire, the burrs will be compressed and fit with the wire or fall off directly through the friction and pressure of the ball 111, thereby achieving the effect of eliminating the burrs.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cable wire drawing process and wire drawing equipment, characterized in that: The cable drawing process comprises the following steps: The first step is to prepare the raw materials: Material selection: Choose appropriate copper or aluminum as raw material according to the purpose and performance requirements of wires and cables; Material inspection: inspect raw materials to ensure they meet national standards and requirements; Equipment inspection: Check whether the wire drawing machine, die, lubrication system and other equipment are operating normally to ensure the stability and continuity of the production process; The second step is wire drawing process: Feeding: Feed the prepared raw materials into the feeding port of the wire drawing machine to ensure that the raw materials can enter the wire drawing machine smoothly and continuously; Wire drawing: Rough drawing: preliminary drawing through a larger die hole to draw the raw material into a thicker wire; Medium and fine drawing: The material is drawn through progressively smaller die holes to draw the wire into the desired diameter and shape; During this process, the wire will be stretched and extruded through the die multiple times, gradually becoming thinner and achieving the required dimensional accuracy and surface quality; Roundness and burr treatment: put the drawn wire into the wire drawing equipment, turn on the wire drawing equipment, and use the wire drawing equipment to trim the roundness and remove the burrs of the drawn wire; The third step is wire drawing post-processing: Cooling: The wire needs to be cooled after drawing to stabilize its structure and performance. The cooling method can be natural cooling or forced cooling, and the specific method depends on the production conditions and the performance requirements of the wire. Inspection: The wire after drawing is inspected, including the diameter, shape, surface quality and other aspects to ensure that the wire meets the production requirements.

2. A cable wire drawing process and wire drawing equipment according to claim 1, characterized in that: In the second step, lubricants need to be used properly to reduce friction between metals, reduce heat and energy loss, and extend the service life of molds and equipment.

3. A cable wire drawing process and wire drawing equipment according to claim 1, characterized in that: In the second step, when processing the roundness and burrs, the material needs to be heated to 300°C-600°C before being put into the wire drawing equipment.

4. A cable wire drawing process and wire drawing equipment according to claim 1, characterized in that: In the second step, the temperature should be controlled within a certain range during wire drawing. A temperature that is too high will cause oxidation and deformation of the wire, while a temperature that is too low may not achieve the desired wire drawing effect.

5. A cable wire drawing process and wire drawing equipment according to claim 1, characterized in that: In the second step, when drawing the wire, the selection of the die of the wire drawing machine should be based on the specifications and performance requirements of the wire to ensure that the hole shape, size and precision of the die meet the production requirements.

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