Cold drawing die
A cold drawing and die technology, applied in the direction of wire drawing die, etc., to achieve uniform and stable metal flow and eliminate uneven metal flow.
Active Publication Date: 2017-05-24
JIANGYIN ELECTRICAL ALLOY
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- Application Information
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Problems solved by technology
[0015] The purpose of the present invention is to overcome the above disadvantages and provide a cold drawing die, which can effectively eliminate product defects caused by uneven distribution of metal flow due to different compression ratios during the drawing process, thereby improving the processing success rate of special-shaped copper bars
Method used
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Embodiment 1
[0066] The structure of mold A is as follows: Figure 12 , Figure 13 , Figure 14 As shown, the angle of the compression zone 2 is 6°, the angle of the transition zone 3 is 6°, each side wall of the compression zone 2 is flat and forms the same angle with the axis line of the mold body 1, each side wall of the transition zone 3 Flat and at the same angle as the axis of the mold body 1, the cross section of the compression zone 2 is 1mm larger than the corresponding cross section of the transition zone 3, and the transition zone and the sizing zone have a circular arc transition and smooth connection.
Embodiment 2
[0068] The structure of mold B is: such as Figure 15 , Figure 16 , Figure 17 As shown, the difference between mold structure B and the corresponding parts of mold structure A is that the section of compression zone 2 is 0.6mm larger than the corresponding dimension of the section of transition zone 3
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Abstract
The invention relates to a cold-drawing mould. The mould comprises a mould body (1), which is characterized in that from the rear end to the front end of the mould body (1), a compressing area (2) for carrying out first pre-moulding of metal profiles, a transition area (3) for further moulding, and a diameter fixing area (4) for final draw-moulding are arranged in sequence. The compressing area (2), the transition area (3), and the diameter fixing area (4) are connected thoroughly. The compressing area (2) extends externally in a direction towards the front end of the mould body (1), and the front end of the transition area (3) extends externally towards to the compression area (2). The provided cold-drawing mould can effectively eliminate the product defects caused by the metal flowing non-uniform distribution, which is due to the different compression ratios, and thus improves the processing success rate of abnormal copper bars.
Description
technical field [0001] The invention relates to the field of cold plastic forming, in particular to a special-shaped copper row cold drawing die. Background technique [0002] Copper bars have good electrical conductivity, good mechanical properties, good ductility and reliability, so copper bars, as a high-current conductive product, are suitable for high and low voltage electrical appliances, switch contacts, power distribution equipment, bus ducts and other electrical appliances It is also widely used in ultra-high current electrolytic smelting projects such as metal smelting, electrochemical plating, chemical caustic soda, etc. [0003] At present, the production of special-shaped copper bars mainly adopts the process of horizontal extrusion or continuous extrusion of profiles and then drawing finished products. In the drawing process, due to the unreasonable design of the current mold, the distribution of metal flow is uneven, and folds, line marks, etc. often appear. ...
Claims
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IPC IPC(8): B21C3/02
CPCB21C3/02
Inventor 张光亮张涛赵强赵永好冯岳军
Owner JIANGYIN ELECTRICAL ALLOY