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Inverse conical forming mould for automobile gearbox gear combining tooth

A combination technology of automobile transmission and gear, applied in the direction of manufacturing tools, forging/pressing/hammer devices, forging/pressing/hammering machinery, etc., can solve the problem of increasing the axial size and weight of the transmission, low production efficiency, and limited applicability, etc. question

Active Publication Date: 2006-08-23
JIANGSU PACIFIC PRECISION FORGING
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  • Application Information

AI Technical Summary

Problems solved by technology

The traditional reverse taper angle of the combined tooth is realized by cutting the gear shaper. This method has low production efficiency, poor product accuracy, and is labor-intensive. The metal flow line is cut off, which significantly reduces the strength of the combined tooth and interrupts the use. Tooth phenomenon occurs from time to time; and there must be an undercut, which increases the axial size and weight of the transmission, and limits the applicability
The advanced processing method is to pre-forge the combined teeth and then use the inverted cone forming die to complete the inverted cone forming on the press instantly. However, the existing inverted cone forming die has a complex structure, inconvenient operation and adjustment, and high processing costs.

Method used

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  • Inverse conical forming mould for automobile gearbox gear combining tooth
  • Inverse conical forming mould for automobile gearbox gear combining tooth

Examples

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Effect test

example 1

[0011] Example 1: There is a combined tooth mold 2 inside the ring-shaped pressure sleeve 1. The mating surface of the two is a conical surface with a slope α = 12°. The upper port of the tooth mold cavity is the tooth part 4, and the tooth part is provided with 21 There are two axial teeth 9 and tooth grooves, each tooth has a slope on both sides, and the upper tooth width is greater than the lower tooth width. The upper and lower grooves on the inner wall of the tooth mold are respectively provided with radial tension springs 3, and the upper and lower grooves on the outer wall of the tooth mold Limiting rings 5 ​​are respectively arranged in the two grooves, and the tooth mold is divided into 21 equal tooth blocks along the circumferential direction, and each tooth block has a tooth. Adjustment pad 7 and four back-moving springs 6 evenly distributed are arranged below the pressure sleeve. The pressure sleeve and the adjustment pad are installed on the base plate 8 with bolt...

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Abstract

The inverse cone forming mold for combining tooth of automobile gearbox gear belongs to the field of pressurized metal machining mold technology. The combined tooth mold is set inside the ring pressure sleeve through conic surface fitting of obliquity 8-14 deg. The tooth mold is divided into tooth blocks with axial tooth possessing inclined side along the circumferential direction. There are tensional springs in the outer wall of the tooth mold, limiting ring in the outer wall repositioning spring and regulating pad below the pressure sleeve. The present invention is used in the finish forging of inverse cone for combining tooth of automobile gearbox gear, has simple structure, convenient operation and regulation, low machining cost, high precision and high product quality, and is superior to traditional gear shaping apparatus and available extrusion mold.

Description

technical field [0001] The invention relates to a processing die for an automobile transmission gear, in particular to a precision forging forming die for an automobile transmission gear combined with a back-cone tooth. Background technique [0002] The various speeds of the car are realized through the connection between the gears in the transmission and the coupling teeth. In order to prevent the car from being out of gear during driving, it is usually necessary to design the coupling teeth with a reverse taper angle, that is, the width of the outer teeth of the coupling teeth in the axial direction is greater than the width of the inner teeth. The traditional reverse taper angle of the combined tooth is realized by cutting the gear shaper. This method has low production efficiency, poor product accuracy, and is labor-intensive. The metal flow line is cut off, which significantly reduces the strength of the combined tooth and interrupts the use. Tooth phenomenon occurs fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J13/02
Inventor 夏汉关刘庆相周稳龙朱正斌董毅
Owner JIANGSU PACIFIC PRECISION FORGING
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