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Quality monitoring method in a push belt making process

A technology for manufacturing process and push-type belt, applied in the field of monitoring the quality of the push-type belt manufacturing process, can solve the problems of labor consumption, inability to provide a nitriding layer, time-consuming and other problems, and achieve the effect of reducing labor and time.

Active Publication Date: 2008-03-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the applicant has used this known method for many years with satisfactory results, it is considered to be very labor intensive and time consuming
In addition, although this method is preferably suitable for comparing the measured thickness of the nitrided layer with predetermined standards, it does not provide a well-defined characterization of the nitrided layer itself, for example in terms of its absolute thickness or in maraging steels. Nitrogen concentration in the matrix

Method used

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  • Quality monitoring method in a push belt making process
  • Quality monitoring method in a push belt making process
  • Quality monitoring method in a push belt making process

Examples

Experimental program
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Embodiment Construction

[0018] FIG. 1 shows an intermediate part of a known continuously variable transmission commonly used in a motor vehicle in a drive train between an engine and its drive wheels. The variator comprises two pulleys 1, 2, each provided with two pulley discs (disck) 4, 5, between which there is a drive belt 3 of push type for driving from one The pulley 1 , 2 transmits a rotational movement M and a concomitant torque to the other pulley 2 , 1 . The pulley disks 4, 5 are shaped substantially conical and at least one pulley disk 4 is incorporated in the transmission axially movable along a respective pulley shaft 6, 7 on which the two disks 4, 5 are arranged 6, 7 on. The variator usually also comprises an activation device which exerts an axially directed clamping force on said at least one movable disc 4 towards the corresponding other pulley disc 5 so that the push-type belt 3 where it is clamped between them.

[0019] The push belt 3 comprises an endless stretching device 31 an...

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Abstract

A method for monitoring the quality of a process for manufacturing a ring part (30) of a push-type belt (3) of a continuously variable transmission comprising a plurality of relatively thin transverse metal elements (32 ), the metal element (32) is slidably bonded to one or more layered cyclic stretching devices (31), each of which includes a set of flat metal rings (30) nested in each other, particularly is the thickness (T) of the nitrided surface layer (9) of the measuring ring part (30), wherein, by evaporating the ring material, a small indentation (14) is formed in the ring (30) and relative to the ring (30 ) of the outer surface (16) of the notch (14) with reference to the depth (D) of the indentation (14), the nitrogen concentration ([N]) in the evaporated material is measured.

Description

technical field [0001] The present invention relates to a method for monitoring the quality of a push belt manufacturing process, in particular of its endless parts. Such a push-type belt is mainly used as a means of power transmission between two adjustable pulleys of a known continuously variable transmission, which is mainly used in motor vehicles. Background technique [0002] Push-type belts are well known and comprise a plurality of relatively thin transverse metal elements slidably bonded to one or more layered endless (endless) tensioning devices each comprising A set of nested flat metal rings, alternatively the strap rings indicated. Such rings are usually made of maraging steel which combines good tensile strength with good durability, protection against tensile stress and bending fatigue, and has the ability to process the steel from the sheet towards the desired shape Relatively good feasibility, and with the material properties of the final product ring, said...

Claims

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Application Information

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IPC IPC(8): G01N21/67F16G5/16
CPCG01N21/67F16G5/16
Inventor N·C·W·库伊佩尔斯
Owner ROBERT BOSCH GMBH