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Moulds and methods for forming blanks of worm shafts rolled with roller wedge laterally

A technology for forming molds and worm shafts, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of waste of materials, low efficiency, and high production costs, and achieve the effects of reducing processing procedures, reducing production costs, and low production costs

Inactive Publication Date: 2007-11-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional manufacturing method of the worm shaft is that the step shaft part is processed by turning or forging, and the helical tooth part is processed by milling, which has the disadvantages of wasting materials, low efficiency and high production cost.

Method used

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  • Moulds and methods for forming blanks of worm shafts rolled with roller wedge laterally
  • Moulds and methods for forming blanks of worm shafts rolled with roller wedge laterally
  • Moulds and methods for forming blanks of worm shafts rolled with roller wedge laterally

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Embodiment Construction

[0038] 1 to 20 are specific embodiments of the present invention.

[0039] First cut the round bar with a diameter of 58mm into 260mm long, then heat the bar to 1100~1150C in the medium frequency induction heating furnace, and send it into the cross wedge rolling mill through the feeding device, as shown in Figure 2, and install it on the rolling mill The upper mold 1 and the lower mold 3 with cavities on the two surfaces rotate in the same direction, and the heated metal circular bar 2 rotates in the opposite direction under the action of the mold to realize continuous radial compression and axial extension deformation. The spiral tooth-shaped part in the middle of the worm shaft blank is made, and then the stepped shaft parts at both ends of the worm shaft are gradually formed. One worm shaft blank is produced per roll revolution (Fig. 11). Forming example The helix angle of the upper and lower molds of the worm shaft blank is γ=4.75°, the rising angle of the top surface of...

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Abstract

The invention is concerned with forming mould and its method for rolling cross wedge rolling worm axis roughcast, belonging to metal plastic metal forming technology field. Set mould on the rolling cross wedge rolling and send the heated stick stuff into the cross wedge roller through feeding equipment. The upper mould and down mould with model cavity on their surface to the roller move to same direction and the heated metal round stick stuff moves to the different direction with the action of mould. This realizes continuous radial condensation and extending distortion along axis to form the each step including the shape of worm tooth. The part of spiral tooth shape of the worm axis roughcast is finished through the spiral groove tooth shape of the mould, and the part of step axis is finished through the wedge part of mould. The roller moves around to produce a roughcast of worm axis. The invention has high single machine productivity and availability with low cost, less machining process and excellent quality of production.

Description

technical field [0001] The invention belongs to the technical field of metal plastic forming, and in particular provides a forming die for a roll-type cross wedge rolling worm shaft blank and a method thereof. technical background: [0002] Cross-wedge rolling technology is an advanced technology for plastic forming of shaft parts. Its working principle is: two rolls with wedge-shaped molds rotate in the same direction, driving the circular bar to rotate in the opposite direction, and the bar is driven by the wedge-shaped pass. , Rolling and forming various stepped shafts. Its main deformation is radial compression and axial extension. This technology is mainly used for the production of large-volume shaft parts, including: shaft parts on automobiles, tractors, motorcycles, internal combustion engines, hardware tools, construction machinery, power fittings, etc. This technology has the characteristics of high efficiency, material saving and low consumption, and is an advan...

Claims

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Application Information

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IPC IPC(8): B21H8/02B21H8/00B21H1/22B21B27/02B21B1/08
Inventor 刘晋平胡正寰闫华军杨翠苹潘广文
Owner UNIV OF SCI & TECH BEIJING
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