Electrochemical drawing process and electrochemical drawing device for metal wire material

A technology of drawing device and drawing process, which is applied in the field of metal drawing to achieve the effects of low equipment cost, high production safety and low current density

Active Publication Date: 2015-06-24
LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the device and method of preparing wire by electrochemical drawing

Method used

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  • Electrochemical drawing process and electrochemical drawing device for metal wire material

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Embodiment 1

[0032] An electrochemical drawing device for metal wire, such as figure 1 As mentioned above, a DC power supply 1 and an electrolytic cell 3 filled with electrolyte 2 are added on the basis of the traditional drawing device (composed of wire drawing machines 9 and 10 ); 5, the negative electrode of the DC power supply is communicated with the electrolyte 2 through the cathode stainless steel sheet 6; at the same time, insulating blocks 7 are respectively provided at both ends of the electrolytic cell 3, the wire drawing die 8 and the electrolytic cell 3 are insulated and separated, the wire material 5 and the electrolytic cell 3 Insulation and separation; the inner wall of the electrolytic cell 3 is coated with a layer of insulating epoxy resin to isolate the electrolyte 2 and the electrolytic cell 3 from each other.

Embodiment 2

[0034] This embodiment is an electrochemical drawing process of 4043 aluminum alloy, and the aluminum wire is drawn from Φ9.5 to Φ5 through 7 passes. In the example, the electrolyte formula is 20g / L NaOH, 25g / L Mobilbaosu 67 emulsified oil, and the remainder is distillation; the current density introduced in the drawing process is 40mA / cm 2 , the drawing speed is 0.10 m / s.

[0035] Compared with traditional drawing, the cumulative deformation of 4043 aluminum alloy in electrochemical drawing increases, and the drawing force decreases. 4043 aluminum alloy traditionally drawn to Φ5.8 needs to be annealed before drawing, while 4043 aluminum alloy can be drawn to Φ5 without annealing electrochemically. The drawing force during the drawing process decreased by 8%-18%, and the surface hardness of the wire after drawing decreased by 20%. Compared with electroplastic drawing, the introduced current density is extremely small.

Embodiment 3

[0037] This embodiment is an electrochemical drawing process of 2024 aluminum alloy, and the aluminum wire is drawn from Φ9.5 to Φ5 through 7 passes. In the example, the electrolyte formula is 40g / L NaOH, 30g / L Mobilbaosu 67 emulsified oil, and the remainder is distillation; the current density introduced in the drawing process is 50mA / cm 2 , the drawing speed is 0.17m / s.

[0038] Compared with traditional drawing, the electrochemical drawing of 2024 aluminum alloy reduces the number of annealing, the drawing force during the drawing process decreases by about 26%, and the surface hardness of the wire after drawing decreases by 21%. Compared with electroplastic drawing, the introduced current density is extremely small.

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Abstract

The invention discloses an electrochemical drawing device for a metal wire material. According to the electrochemical drawing device, a direct-current power supply 1 and an electrolytic cell 3 in which an electrolyte 2 is contained are additionally arranged, wherein a positive electrode of the direct-current power supply is connected to the metal wire material 5 through a power connection post 4; a negative electrode of the direct-current power supply is communicated with the electrolyte 2 through a cathode stainless steel sheet 6; insulation blocks 7 are respectively arranged at the two ends of the electrolytic cell 3 and used for insulating and separating a wiredrawing mould 8 from the electrolytic cell 3, and insulating and separating the metal wire material 5 from the electrolytic cell 3. Compared with the conventional drawing, the electrochemical drawing process has the advantages that the surface hardness of the wire material can be reduced, the surface quality is improved, various scratches and cracks on the surface of the material are effectively reduced, the middle annealing times of the wire material are reduced, and the wire material preparation efficiency is improved; under the same process condition, the surface-layer hardness of the aluminum alloy material is reduced by 10%-20%, the drawing force is reduced by 8%-18%, and the drawing force of the copper alloy is reduced by 10%-27%.

Description

technical field [0001] The invention belongs to the technical field of metal drawing, and in particular relates to an electrochemical drawing process for increasing the surface plasticity of wire materials. Background technique [0002] Drawing is a common plastic processing method that forces metal to pass through the die hole under the action of external tension to obtain wire products of corresponding shape and size. Drawing is generally carried out at room temperature. For some metal wires with better plasticity, the plasticity decreases due to work hardening after repeated drawing, and the next drawing can only be continued after annealing. What annealing brings is the improvement of production cost, the reduction of production efficiency and other problems. For some metal wires with high strength and poor plasticity at room temperature, due to the characteristics of two-way compression and one tension during drawing, cracks are prone to occur during drawing and lead t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/02C25D7/06
CPCB21C1/02C25D7/0607
Inventor 傅开武阎峰云马颖李先施正国陈体军刘洪军李小慧
Owner LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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