Bar conveying machine and its control method

Abstract

To provide a bar-stock feeder by which the maximum number of parts can be machined from a piece of bar stock by sending and feeding a long bar stock to the end without any problem of vibration and noise. This bar-stock feeder is characterized by feeding the bar stock while pushing a bar-stock pushing member , which has a first step pushing member for pushing the bar stock W when the rear end of the bar stock is positioned at the rear of a tubular passage in a bar-stock processing machine, and a second step pushing member for pushing the bar stock W when the rear end of the bar stock W is positioned in the tubular passage. The first step pushing member has a retaining portion for receiving and retaining the rear end of the bar stock W, and the second step pushing member has an outer diameter smaller than an inner diameter of the tubular passage in the bar-stock processing machine and extends co-axially with a feeding axial line. The second step pushing portion is provided so as to project from the inside of the retaining portion of the first step pushing member along the feeding axial line when used to push the bar stock W into the tubular passage.

Description

technical field [0001] The present invention relates to a rod feeding device for feeding rods to a rod processing machine. Background technique [0002] In order to automatically transfer the rods to the rod processing machine, a rod feeder is used. The bar processing machine has a main shaft extending straight along the conveying axis of the bar, and a collet for holding the bar is provided at the front end of the main shaft. The high-speed rotation of the main shaft makes the bar held by the collet chuck rotate at a high speed. In order to prevent the bar from vibrating during high-precision machining, the main shaft of the bar processing machine is equipped with an inner tube that rotates at high speed with the main shaft, or a pipe member called a fixed tube that does not rotate with the main shaft. The pipe member is extended over the entire main axis, and a tubular passage through which the rod passes is formed inside. To keep the bar from vi...

AI Technical Summary

Problems solved by technology

Since the rear end of the bar is not held by a propulsion member, the rear end of the bar vibrates when the bar rotates at a high speed during bar processing, not only making it impossible to perform high-precision machining, but also causing vibration and noise.

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