An ultra-fine wire drawing die elongation testing device

Abstract

The invention belongs to the field of wire production, and particularly relates to a testing device of elongation of an ultramicro filament wire-drawing die for testing. The testing device provided by the invention at least comprises a wire pressing part and a testing mold, wherein the wire pressing part is used for clamping and fixing one end part of a to-be-stretched ultramicro filament; the testing mold can perform linear motion along the to-be-stretched direction of the ultramicro filament; a through hole penetrating through a mold body is formed in the testing mold, and the axis direction of the through hole is coincided with the to-be-stretched direction of the ultramicro filament; the diameter of the through hole is equal to the mold hole diameter of a to-be-matched mold, and the to-be-stretched ultramicro filament passes through the through hole, and extends straightly and is fixed at the wire pressing part. The device is also provided with a measurement component for measuring and calculating the elongation length of the ultramicro filament, and the measuring and calculating path of the measurement component at least is configured at the extending path of the to-be-stretched ultramicro filament. The device provided by the invention integrates theory measurement and calculation and actual practice, can directly obtain the elongation numerical value and the actual mold matching result, and also guarantees the high production efficiency of the ultramicro filament while the production cost is reduced effectively.

Description

technical field [0001] The invention belongs to the field of wire rod production, and in particular relates to an ultrafine wire drawing die elongation testing device. Background technique [0002] In the production of wire rods, whether the die matching is reasonable or not has an important impact on the actual use of parameters such as product breakage rate, die life, and wire drawing wheel wear; If the line is disconnected due to a ratio problem, the trailer must be disconnected immediately, and the production efficiency and work efficiency will inevitably be greatly reduced. As for the multi-channel drawing of the multi-head wire drawing machine, the selection of the mold matching is particularly important. Therefore, the diameter of the copper wire must be known before the mold matching, and the diameter of the copper wire must be used to calculate the speed ratio of the wire drawing and the sliding coefficient formula. The optimal elongation ratio is obtained, and fin...

AI Technical Summary

Problems solved by technology

[0002] In the production of wire rods, whether the die matching is reasonable or not has an important impact on the actual use of parameters such as product breakage rate, die life, and wire drawing wheel wear; If the line is disconnected due to a ratio problem, the trailer must be disconnected immediately, and the production efficiency and work efficiency will inevitably be greatly reduced.

As for the multi-channel drawing of the multi-head wire drawing machine, the selection of the mold matching is particularly important. Therefore, the diameter of the copper wire must be known before the mold matching, and the diameter of the copper wire must be used to calculate the speed ratio of the wire drawing and the sliding coefficient formula. The optimal elongation ratio is obtained, and finally the size of the mold is obtained; however, in actual operation, it is found that for copper wires with thick wire diameters, the measurement range is relatively large compared with thick wire diameters, and it is indeed possible to measure the wire diameter with The method is used to achieve mold matching, and its error can be guaranteed to be within 1%, which is acceptable, but for ultra-fine wire copper wire, that is, copper wire whose wire diameter is not greater than 0.05mm, measuring its wire diameter At the same time, since the readable size range is often several digits after the decimal point, the reading error itself is high. After calculating the product of the formula, the error is even as high as 3% or more. However, this method is still used in China to measure wire diameter. This method is used to match the mold, which is also the root cause of the low efficiency of producing ultra-fine wires

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