Method and device for manufacturing gears together with clamping mechanism

A clamping mechanism and gear technology, applied in the direction of gears, applications, household appliances, etc., can solve the problem of reducing the quality of the teeth, and achieve the effect of ensuring positioning, reliable clamping, and reducing production costs

Active Publication Date: 2018-03-13
GKN POWDER METALLURGY ENG GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, said method is not suitable for sufficiently supporting the ends of the teeth which are thinner in the direction of force to ensure sufficient compression and to prevent springback of the tooth ends when rolling gears with especially helical teeth
Due to the only elastic deformation during the recompression, the tooth flanks are staggered and thus lead to a reduction in the quality of the toothing or an increased hardness finish due to undesired additional machining allowances.

Method used

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  • Method and device for manufacturing gears together with clamping mechanism
  • Method and device for manufacturing gears together with clamping mechanism
  • Method and device for manufacturing gears together with clamping mechanism

Examples

Experimental program
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Embodiment Construction

[0045] figure 1 An exemplary rolling apparatus is shown schematically. The first rolling tool 10 with the first toothing 12 is mounted rotatably about a first axis 14 in a direction of rotation 16 . During rolling, the direction of rotation can be changed once or also several times. The first rotational orientation may also be indicated in a direction opposite to that shown. The first toothing 12 is in engagement with the second toothing 18 of the gear blank 20 . The gear blank 20 is mounted rotatably about a second axis 22 . Correspondingly, the second direction of rotation 24 is formed. Furthermore, the second toothing 18 is engaged with the third toothing 26 of the second tool 28 . The second tool 28 is mounted rotatably about a third axis 30 in a third direction of rotation 32 . With such a rolling device, for example, in the region of the machining allowance, at least the surrounding tools 10 and 28 with the counter toothing 12 and 26 engaging in the toothing 18 of ...

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PUM

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Abstract

The invention relates to a method for producing at least one gear, in particular a helically toothed gear, wherein the gear is produced from a gear blank pressed and sintered with an oversize in the region of the set of teeth, wherein the gear blank has two opposite end faces and a circumference. In the method, the gear blank is clamped in a clamping means. The gear blank is compressed in the region of the oversize by means of the engagement of at least one circumferential tool having a set of mating teeth that engages with the set of teeth of the gear blank, wherein the gear blank is radially clamped over the circumference by the clamping means at both end faces during the compression of the gear blank, wherein each individual tooth of the set of teeth of the gear blank is supported by the clamping means substantially over the entire tooth height. In this way, the quality of the set of teeth can be improved. The invention further relates to a device and to a clamping means.

Description

technical field [0001] The invention relates to a method for producing at least one gear wheel, a device for producing at least one gear wheel and a clamping mechanism therefor. Background technique [0002] European patent EP 1 694 452 B1 describes a method for manufacturing gears. In order to avoid a lower bending fatigue strength in the region of the dedendum and a lower wear resistance in gears produced by powder metallurgy, it is known to compress the sintered powder of the gear in the flank region as well as in the root region The metallurgical blanks result in a largely pore-free surface layer which significantly increases the permissible load carrying capacity in the engagement region of the gears. The compression of the surface layer is achieved by means of at least one pressing tool in the form of a gear which either has external toothing which engages into the toothing of the powder metallurgy blank or which has tooth flanks by means of which the powder metallurg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21H5/02
CPCB21H5/022B22F5/08B22F5/085
Inventor G.科特霍夫B.洛伊波尔德F.瓦滕贝格
Owner GKN POWDER METALLURGY ENG GMBH
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