Automatic coil wall-thickness reduction and drawing device and drawing method of small-diameter capillary tube

Abstract

The invention relates to an automatic coil wall-thickness reduction drawing device and drawing method of a small-diameter capillary tube. The drawing device comprises a feeding tray, an electric motor and a gear box controlled by the electric motor, wherein the power take-off shaft of the gear box is fixed connected with a drawing mechanism; the drawing device also comprises a mould box, wherein moulds are arranged in the mould box, a raw material tube inlet and a finished tube outlet are separately processed on the opposite side walls of the mould box, a start-stop sensor is arranged at the finished tube outlet, and the start-stop sensor is connected with a control system. The drawing method of the invention adopts oil bath type lubrication, the auxiliary materials can be recycled, the small-diameter capillary tube meeting the drawing quality requirements of the straight pipe can be drawn, the quality controllability is high, the machining condition is not needed to monitor frequently, the work efficiency is greatly increased, the input-output ratio are improved, and the consumption of auxiliary materials is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal cold drawing processing, and relates to a device for processing capillary tubes with an outer diameter of less than 8 mm, in particular to an automatic coil wall-reducing stretching device for small-diameter capillary tubes. The stretching device is a method for stretching a small-diameter capillary. Background technique [0002] At present, the small-diameter capillary tube with an outer diameter of less than 8 mm is processed on an ordinary straight tube stretching machine by using the method of straight tube reduction and wall stretching. This method has the following advantages: 1) Strong quality controllability, stable wall size, and wall thickness The value consistency is good; 2) The measurement can be monitored and measured at any time during single processing, which can prevent batch defects caused by mold wear in time. But this method also has the following disadvantages simultaneously: 1...

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Problems solved by technology

But this method also has the following disadvantages simultaneously: 1) Straight pipe stretching is a single stretching method, and the good product rate after single stretching is about 95%. The output rate is about 78%, the loss is high, and the input-output rate is low; 2) Each tube needs to be repeatedly oiled, molded and stretched, which is inefficient; 3) Each tube needs to be cleaned and cleaned manually. Apply lubricating oil, resulting in large consumption of auxiliary materials

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