Design method of low energy consumption guide plate of two-high rotary piercer
A cross-rolling piercing and design method technology, applied in metal rolling, guiding/positioning/alignment devices, etc., can solve the problems of high energy consumption in piercing and rolling, achieve considerable process costs, increase service life, and reduce rolling load Effect
Inactive Publication Date: 2018-09-28
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0004] In order to solve the problem of high energy consumption of piercing and rolling caused by the existing design of the guide plate of the two-roll cross-rolling piercer, the invention provides a design method of the guide plate to realize rolling with low energy consumption
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[0019] Example: In the production of a barrel roll cross-rolling and piercing unit in a certain factory, a tube blank with a diameter of 180mm is used to actually produce a pierced and rolled 210*12mm capillary tube. The nominal diameter of the roll is 720mm, the length of the roll body is 590mm, the entrance angle is 3 degrees, the exit angle is 3.5 degrees, the feed angle is 6 degrees, and the diameter of the top is 174mm. The side cone angle αA angle is 3 degrees, the outlet side cone angle αB angle is 4 degrees, the total length of the guide plate is 445mm, and the radius RCC of the arc surface at the hole throat of the guide plate is 108mm.
[0020] Under the condition that the piercing and rolling deformation specifications, roll and plug specifications, and production conditions are unchanged, only the improved guide plate is replaced for production practice. Taking the motor ammeter data during on-site stable piercing and rolling as the consideration index of energy co...
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The invention provides a design method of a low energy consumption guide plate of a two-high rotary piercer. The design method is characterized in that, on the working surface of frictional contact between a guide plate and a steel pipe, and taking the projection line of a rolling centerline on the guide plate surface as a boundary, the surface of the side, that a pipe body is rotated to enter, ofthe guide plate is an arc surface, and the surface of the side, that the pipe body is rotated to leave, of the guide plate is a plane. The position where the circle center of the arc surface of the guide plate is located has an eccentric distance relative to the rolling centerline, and the eccentric distance Le is (0-0.2)*diameter value of a pipe blank. According to the design method, the rollingload during rolling of the two-high rotary piercer can be reduced effectively, and the service life of the guide plate is prolonged; the considerable economic benefits are produced from the process cost, and meanwhile the conditions are created for further mining of equipment potential and development of high-grade steel products which are hard to deform.
Description
technical field [0001] The invention relates to a design method for a guide plate of a two-roll cross-rolling piercer. In particular, it relates to a guide plate design method for realizing rolling with low energy consumption in a two-roll cross rolling piercer. Background technique [0002] In the production of seamless steel pipes, the piercing machine is one of the important main deformation equipment. In the rolling process of the piercing machine, the solid tube blank is rolled through a pass composed of rolls, guide plates and plugs to obtain a hollow capillary tube. In the pass structure of the piercer, the roll is the main drive external deformation tool, the plug is the internal deformation tool that rotates with the deformed metal, and the guide plate is the fixed external deformation tool. The guide plate plays the role of guiding the deformed steel pipe, limiting the lateral deformation of the capillary tube and closing the pass in the pass rolling, and is an i...
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IPC IPC(8): B21B39/16B21B19/04
CPCB21B19/04B21B39/165
Inventor 魏朝辉路浩煜吴春京
Owner UNIV OF SCI & TECH BEIJING