Roll extrusion forming device for variable-wall-thickness cylinder part
A technology of changing wall thickness and cylinder body, applied in the field of metal precision plastic forming, can solve the problems of difficult to remove flash parts, difficult to remove flash, affecting production efficiency, etc., to ensure continuity, accurate forming, automatic accurate reset. Effect
Inactive Publication Date: 2014-01-08
ZHONGBEI UNIV
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Problems solved by technology
In order to improve the life of the roller in the rolling process, it is necessary to set up flash grooves. However, the billet is generally high-strength alloy steel, and the generated flash is difficult to remove by mechanical processing.
The method of secondary rolling extrusion can remove the flash, but the rolling forming is thermal deformation, and the temperature of the flash part drops rapidly. If the method of forming twice is used, it will not only affect the production efficiency, but also cause flashing due to insufficient deformation temperature. The edge parts are difficult to remove, and even have defects such as folding and breaking
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[0012] Such as figure 1 , figure 2 , image 3 As shown, the device of the present invention is divided into upper and lower layers, and each layer includes three parts: a roller, a frame, and a reset device. Among them, the upper roller extrusion mechanism has three flash grooves in the closed part of the roller, the middle part of the lower roller is facing the closed part of the upper roller (the position where the two rollers intersect), and the three rollers of the lower roller extrusion mechanism After rotating 60 degrees, the two closed parts are facing the closed parts of the upper roller, and the upper and lower positions of the upper and lower rollers correspond one by one. The driving rollers of the squeezing mechanism and the driving rollers of the lower rolling mechanism are on the same vertical plane, and the driven rollers of the upper rolling mechanism and the driven rollers of the lower rolling mechanism are on the same vertical plane. During a rolling extr...
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The invention belongs to a metal precision plastic forming technology, and in particular relates to a roll extrusion forming device for a variable-wall-thickness cylinder part. The roll extrusion forming device for the variable-wall-thickness cylinder part consists of an upper layer of roll extrusion mechanism and a lower layer of roll extrusion mechanism, wherein each layer comprises a driving roller, two driven rollers which are meshed with the driving roller through bevel gears, and a reset device; each reset device comprises an air cylinder, a rack and a piston; in the same layer of roll extrusion mechanism, a reset gear on the driving roller is meshed with the rack, the rack is connected with the piston, and the piston is arranged on the air cylinder. According to the roll extrusion forming device for the variable-wall-thickness cylinder part, the two layers of roll extrusion mechanism are packaged, so that a fin-free variable-wall-thickness cylindrical part can be quickly and accurately formed at one time.
Description
technical field [0001] The invention belongs to metal precision plastic forming technology, in particular to a roll extrusion forming device for variable-wall-thickness cylinder parts. Background technique [0002] Most of the cylindrical parts with variable wall thickness are made of high-strength alloy steel. The traditional production method adopts the "pressing-punching-extension" process to form a straight-walled cylinder, and then machine cutting to process different wall thicknesses. The material utilization rate is extremely high. Low (40%), high tool consumption and high production costs. In addition, the method of powerful spinning can also form this kind of parts, but there are disadvantages such as many times of spinning, long production cycle, low production efficiency, and difficulty in releasing the cylinder from the mandrel after spinning. Therefore can't satisfy this part this product multi-species, the requirement of mass production. [0003] At present, ...
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IPC IPC(8): B21C37/00
Inventor 张治民赵熹张宝红薛勇孟模
Owner ZHONGBEI UNIV