Tool for calibrating and deburring pipe ends

• US 5,427,477 A
• Filed: 05/05/1994
• Issued: 06/27/1995
• Est. Priority Date: 05/14/1993
• Status: Expired due to Fees

• Current Assignee: NEC Tokin Corporation (Yageo Corporation)
• Original Assignee: Geberit Technik AG
• Inventors: Weiss, Paul
• Primary Examiner(s): Howell, Daniel W.
• Application Number:
  US08/238,502
• Time in Patent Office: 418 Days
• Field of Search: 7/157, 82/113, 408/223, 408/224, 408/225, 408/1 R, 408/80, 408/81, 408/82, 408/201
• US Class Current: 408/1.00R
• CPC Class Codes: B23B 2270/16 Constructions comprising three or more similar components
• CPC Class Codes: B23B 5/168 with guiding devices
• CPC Class Codes: B23B 51/009 Stepped drills
• CPC Class Codes: Y10T 408/03 Processes
• CPC Class Codes: Y10T 408/906 Axially spaced

Abstract

A tool provided with a head tapering stepwise toward a front side. Each step of the head has a cylindrical area for calibrating a pipe end and, joining it, a conical area for deburring the pipe end. Each step of the head corresponds to a usual pipe size. When the head is pushed into a pipe end to be processed, the pipe end is first calibrated and subsequently deburred in one operation. The pipe end is centered in relation to the longitudinal axis of the head due to the calibration at the cylindrical area, which guarantees accurate deburring at the conical area. Each conical area has a plurality of cutting edges, which are formed by chip grooves. The tool is especially suitable for preparing pressed connections on composite pipes.

Claims

1. Tool for calibrating and deburring pipe ends, comprising:

a single head including calibrating means with a cylindrical area for calibration and deburring means with a conical area for deburring, said conical area being disposed behind said cylindrical area to position said conical area with respect to said cylindrical area such that when said head is introduced into a pipe end to be processed, said cylindrical area can first be brought into contact with said pipe end and said conical area can subsequently be brought into contact with said pipe end; and

a shoulder, connected to said conical area and extending radially outwardly therefrom, said shoulder forming a stop for engaging a front face of the pipe end to center said pipe end and to provide uniform deburring.

2. Tool according to claim 1, wherein said head includes a plurality of cylindrical areas, each cylindrical area having an associated said conical area, said plurality of cylindrical areas being provided with different diameters to form a stepped head for deburring a pipe of one of various different defined internal diameters.

3. Tool according to claim 1, wherein said conical area has at least one cutting edge formed adjacent to a chip groove.

4. Tool according to claim 2, wherein each of said conical areas include an associated cutting edge formed adjacent to a chip groove.

5. Tool in according to claim 3, wherein said chip groove extends into an outside of said head and extends in a circumferential direction of said head.

6. Tool in according to claim 4, wherein said chip groove extends into an outside of said head and extends in a circumferential direction of said head.

7. Tool according to claim 6, wherein a plurality of radially arranged chip grooves extend into said head for each conical area.

8. Tool according to claim 1, wherein said head has a broad end fastened to a handle.

9. A process for deburring composite pipes or plastic pipes for interior installation, comprising the steps of:

providing a tool with a head having a cylindrical area for calibration and a conical area for deburring, said conical area being arranged behind said cylindrical area and a shoulder connected to said conical area and extending radially outwardly therefrom, said shoulder forming a stop;

introducing said head into a pipe end to be processed including

first bringing said cylindrical area into contact with said pipe end; and

subsequently bringing said conical area into contact with said pipe end and deburring said pipe end with said conical area and subsequently engaging a front face of the pipe end with said stop to center said pipe end and to provide uniform deburring.

10. A process according to claim 9, wherein said tool is provided with a plurality of cylindrical areas, each of said cylindrical areas having a corresponding one of said conical areas, said cylindrical areas having different diameters to define a stepped head;

and employing one of said cylindrical areas based on a diameter of one of said cylindrical areas corresponding to a defined pipe internal diameter.

11. Tool for calibrating and deburring pipe ends, comprising:

a single head including calibration means with a cylindrical area for calibration and deburring means with a conical area for deburring, said cylindrical area including a cylindrical portion extending uninterrupted about said head, said conical area being disposed behind said cylindrical area such that when said head is introduced into a pipe end to be processed, said cylindrical area can first be brought into contact with said pipe end and said conical area can subsequently be brought into contact with said pipe end;

a shoulder, connected to said conical area and extending radially outwardly therefrom, said shoulder forming a stop for engaging a front face of the pipe end to center said pipe end and to provide uniform deburring, said conical area including an associated cutting edge formed adjacent to chip groove means, said chip groove means including a chip groove extending into an outside of said head and being radially arranged adjacent to said uninterrupted cylindrical portion for removing chips of the pipe to an outside of the pipe, said uninterrupted cylindrical portion preventing said chips from entering the pipe.

12. Tool according to claim 11, wherein said head includes a plurality of cylindrical areas, each cylindrical area having an associated said conical area with said shoulder, said plurality of cylindrical areas being provided with different diameters to form a stepped head for deburring a pipe of one of various different defined internal diameters.