Method for producing rotationally symmetrical, undercut contours

A rotationally symmetric and symmetrical technology, applied in the field of workpieces, can solve the problems affecting the wear resistance of the final product, the structure of the workpiece is not firm, and the high degree of debris, etc., to increase the strength and service life of the material, reduce cracks, and improve performance.

Inactive Publication Date: 2007-11-14
CARL DAN PEDDINGHAUS
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of these known methods is on the one hand the high level of chipping, especially in the case of internal contours of mass-produced items such as pistons, which have to be machined in one piece, and on the other hand the concomitant occurrence in conventionally manufactured products Particle interruption of
This interruption results in a structurally weak workpiece, which adversely affects wear resistance, service life, and cost of the final product

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing rotationally symmetrical, undercut contours
  • Method for producing rotationally symmetrical, undercut contours
  • Method for producing rotationally symmetrical, undercut contours

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Using the method shown in Figures 1-3, a rotationally symmetrical undercut outer profile can be formed on a forged steel piston for a high performance diesel engine. The method according to the invention is carried out with the device illustrated in FIG. 1 , comprising a collet 11 for holding a workpiece 13, a tool 12 for machining the workpiece, and a collet for attaching the collet to the workpiece 13. A device (not shown) for feeding the workpieces 13 together to the tool 12 . Here, the tool 12 includes a circumferential rim for radially restricting the flow of material generated during machining. The steel piston used in the exemplary embodiment as workpiece 13 comprises a hollow rotationally symmetrical section 14 which forms the end of the steel piston to be machined. The machining tool 12 abuts against this segment under the action of the axial pressure required for machining by means of a feed movement.

[0026] The collet 11 is rotatable about a rotational ax...

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

PUM

No PUM Login to view more

Abstract

The invention relates to a method for producing essentially rotationally symmetrical, undercut contours on workpieces (13) that can for example be produced by forging or casting, said workpieces having at least one sub-section (14) to be machined with an essentially symmetrical initial contour. The workpiece (13) is braced by the end that is not to be machined in a recess (11) and when in said recess (11) the sub-section (14) of the workpiece that is to be machined is placed against a tool (12). The tool (12) rotates with a constant or variable speed in relation to the sub-section (14) of the workpiece (13) that is to be machined. An undercut contour is thus produced on the sub-section (14) of the workpiece (13) by machining under an axial pressure.

Description

technical field [0001] The present invention relates to a method for chipless, non-cutting production of a substantially rotationally symmetrical undercut contour on a workpiece, and to workpieces produced by the method. Such undercut contours can be formed in particular on segments of workpieces produced by forging, casting or cutting. Background technique [0002] The methods known in the prior art so far all manufacture rotationally symmetric undercut profiles by cutting, such as cooling channels on a piston of a diesel engine of a commercial vehicle. That is, an initial workpiece manufactured, for example, by forging or casting, is machined by a material removal method such as turning, grinding, or cutting to produce an undercut profile. [0003] The disadvantage of these known methods is, on the one hand, the high level of chipping, especially in the case of the internal contours of mass-produced items such as pistons, which require integral machining, and, on the othe...

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

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/18B21K21/12
CPCB21J5/063B21K21/12Y10T409/303808B21K1/185B21K1/18
Inventor 拉尔夫·伯恩哈德马蒂亚斯·普鲁萨克
Owner CARL DAN PEDDINGHAUS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap