Method and device for forming internal gear

An internal gear and tooth profile technology, applied in the field of internal gear forming and forming devices, can solve the problems of poor strength and durability of parts, unqualified, and high degree of
CN101376153AInactive Publication Date: 2009-03-04NIHON SPINDLE MFG CO LTD
2 Cites 12 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NIHON SPINDLE MFG CO LTD
Publication Date
2009-03-04
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A inner gear forming method can ensure no shortened cycle caused by material shortage even in inner gear forming to thin walled blank by plastic working. In the inner gear (W) forming method for forming cylindrical inner gear (W) by mounting blank (P) on the mandrel (2) which has gear form (2C) on circumference and pushing the depth drawing roller (1) to the blank (P), a depth drawing roller (1), which has arc sections (R1, R2) contacting with the blank (P) on two positions while the outside diameter (D2) of the second contacting arc section (R2) is smaller than that of the first contacting one, is used to form the cylindrical inner gear (W) by moving it along the direction along the axes (M) of the mandrel (2).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a forming method and a forming device of an internal gear, and particularly to a method and a forming device capable of forming a good internal gear without lack of material even by plastic working. Background technique

[0002] Among the existing methods of forming internal gears, the method of plastic working generally adopts the method of using a cup-shaped blank in advance to cover the outer peripheral surface with teeth. It is mounted on a mandrel with a shape, and is plastically processed by pushing with a drawing roll. However, in this case, steps such as press working are required as a step of forming the blank into a cup shape, and there is a problem that it takes a lot of time to manufacture each product.

[0003] Therefore, as a method of forming an internal gear while directly forming a cup shape from a circular plate-shaped blank by plastic working using a spinning device, there has been adopted a method ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More