# US 4,394,007 A · Deburring chamber for thermal deburring

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- Number: US 4,394,007 A
- Document ID: US4394007A
- Status: Granted
- Kind: A
- Application number: 06/253,843
- Filed: 1981-04-23
- Granted: 1983-07-19
- Earliest claimed: 1979-09-27
- Assignees: Robert Bosch GmbH
- Inventors: Ernst Leisner
- Web page: https://patentgrep.com/patent/US4394007A

## CPC

- B22D 31/00: Cutting-off surplus material, e.g. gates; {Cleaning and working on castings (B22D17/2076 takes precedence)}
- B23D 79/005: {for thermal deburring (B23D79/025 takes precedence)}
- B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22)
- B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q)

## Abstract

A thermal deburring chamber has interchangeable inner parts exposed to wear backed by permanent parts providing support and cooling. The inner parts fit so as to permit some expansion without transmitting excessive thermal or mechanical shock to the backing members.

## Claims

### Claim 1

A chamber for thermal deburring of work pieces comprising readily replaceable parts (11,12,13) fitting together to provide respectively the internal lateral, tip and bottom walls of said chamber and more permanent backing parts (17,15,23) assuring support and shock-resisting integrity for the chamber.

### Claim 2 (depends on 1)

A deburring chamber as defined in claim 1, in which said readily replaceable parts comprise an inner sleeve-like ring (11) encircling the enclosed space of the chamber, an inner top cover (12) fitting on the ring and an inner bottom cover fitting the ring.

### Claim 3 (depends on 2)

A deburring chamber as defined in claim 2, in which the fit of said inner top cover (12) to said ring (11) is of such shape that some deformation of said top cover without loss of fit to the ring is possible by internal pressure.

### Claim 4 (depends on 2)

A deburring chamber as defined in claim 2, in which said backing parts include a cooling sleeve-like ring (14) surrounding said inner ring (11) and providing a clearance fit between said inner and cooling rings.

### Claim 5 (depends on 4)

A deburring chamber is defined in claim 4, in which said backing parts include an adapter (17) above said inner top cover equipped for cooling said top cover and having a connection (18) for circulation of a coolant medium, said adapter (17) providing a supporting transition to a machine frame.

### Claim 6 (depends on 5)

A deburring chamber as defined in claim 5, in which prestressed tension bolts (19) are provided for connecting said adapter (17) with cooling sleeve-like rings (14).

### Claim 7 (depends on 5)

A deburring chamber as defined in claim 5, in which the lower surface of said adapter (17), being provided for abutment of said top cover (12) under internal pressure, has a concave shape.

### Claim 8 (depends on 2)

A deburring chamber as defined in claim 2, in which said readily replaceable parts are made of materials chosen for wear and erosion resistance while said backing parts are made of materials chosen for withstanding forces generated by pressure and shock in the course of deburring operations.