Method for determining rotating speed of main shaft expanded by cold rolling

A technology of spindle speed and rolling, applied in the field of cold rolling of rings, can solve the problems of lack of scientific basis, long process cycle of new products and high cost, and achieve the effect of shortening process cycle, reducing the number of tests and high processing efficiency

Inactive Publication Date: 2007-02-21
WUHAN UNIV OF TECH
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Problems solved by technology

At present, the determination of the spindle speed of the cold ring rolling machine is based on repeated tests and

Method used

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  • Method for determining rotating speed of main shaft expanded by cold rolling
  • Method for determining rotating speed of main shaft expanded by cold rolling
  • Method for determining rotating speed of main shaft expanded by cold rolling

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specific Embodiment

[0043] Ring blank size is: R 0 =33.6mm, r 0 =23.9mm, radius R of the main roller 1 =103.61mm, v f =2mm / s, the wall thickness of the ring blank is 9.7mm, and the wall thickness of the finished ring is h min =7.7mm, when rotating speed N (unit: rpm) is 5, 10, 30, 100, 130, 150, 170, 190, 240, 800 respectively, bring into formula (12), get diameter growth rate with respect to spindle speed and rolling graphs of the wall thickness of the rings in the process, which are a set of curves such as figure 2 shown. It can be seen from the figure that when the speed is above 150rpm, the five curves basically overlap (the relative difference of the diameter growth rate corresponding to two adjacent curves at the same wall thickness is within 1%), and 150rpm is the most reasonable as the spindle speed.

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Abstract

A method for determining the rotation speed of mainshaft used for cold rolling of a ring blank includes such steps as measuring the external and internal diameters of ring blank and the radius of main rolling wheel, calculating the wall thickness of ring blank, setting up the feeding speed to be 2, inserting said values in a disclosed equation to obtain a function, drawing the function graphics of diameter increasing rate, finding out a N value where the relative difference between two diameter increasing rates for two curves is less than 1% at the position with same wall thickness, and determining the N value is the target rotation speed.

Description

technical field [0001] The invention belongs to the field of cold rolling processing of ring parts, and in particular relates to a method for determining the rotating speed of a main shaft of cold rolling expansion. Background technique [0002] In the process of cold rolling, the spindle speed is an important process parameter, which is related to the feed speed and processing efficiency, and is also related to the cost of the equipment. At present, the determination of the spindle speed of the cold ring rolling machine is based on repeated experiments and experience accumulation, lacking scientific basis, therefore, the new product has a long process cycle and high cost. Contents of the invention [0003] In view of the above shortcomings, the object of the present invention is to provide a simple and accurate method for determining the rotational speed of the cold rolling spindle. [0004] In order to achieve the above object, the present invention adopts the following...

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Application Information

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IPC IPC(8): B21H1/06B21B37/00B21B37/46
Inventor 华林鄢奉林
Owner WUHAN UNIV OF TECH
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