Deburring tool

• US 4,678,380 A
• Filed: 01/17/1986
• Issued: 07/07/1987
• Est. Priority Date: 01/17/1986
• Status: Expired due to Fees

• Current Assignee: Crawford Fitting Co.
• Original Assignee: Crawford Fitting Co.
• Inventors: Zahuranec, Emery J., Musil, James C.
• Primary Examiner(s): Weidenfeld, Gil
• Assistant Examiner(s): Bishop, Steven C.
• Application Number:
  US06/819,722
• Time in Patent Office: 536 Days
• Field of Search: 407/33, 407/56, 407/57, 408/211, 408/227, 408/228, 29/1.32, 76/101 A, 82/4 C
• US Class Current: 408/211
• CPC Class Codes: B23B 5/167 Tools for chamfering the ends of bars or tubes
• CPC Class Codes: Y10T 407/1906 including holder [i.e., head] having seat for inserted tool
• CPC Class Codes: Y10T 407/1954 Axially tapering tool
• CPC Class Codes: Y10T 408/899 Having inversely angled cutting edge
• CPC Class Codes: Y10T 408/909 Having peripherally spaced cutting edges

Abstract

A deburring tool for reaming inner and outer diameter end portions of tube and pipe-like workpieces includes a cast housing having an integrally formed conical support member therein. The conical support member has a base portion disposed adjacent one end of the housing and an apex area spaced toward the other end of the housing. Radially disposed apertures having a predetermined width dimension divide the conical support member into a plurality of wedge portions. A blade assembly is comprised of a plurality of separate blades which are fixedly secured to each other in a pattern identical to the pattern of apertures in the support member. The blades have a thickness dimension which is greater than the width dimension of the apertures in order that the blade assembly will be retained in the conical support member by a press-fit relationship established between the blades and apertures. Each blade includes first and second cutting surfaces protruding axially from the support member and adapted for deburring engagement with the inner and/or outer diameter end portions of an associated workpiece.

Claims

1. A hand tool for deburring peripheral end portions of a generally cylindrical workpiece, said tool comprising:

a generally cylindrical housing having a longitudinal axis extending axially thereof, said housing having first and second open ends;

a generally conical blade support means disposed in said housing so as to have a base area adjacent said housing first end and an apex area spaced toward said housing second end at said longitudinal axis, said support means including plural apertures extending radially outward from said apex area in a first predetermined pattern and each having a predetermined unstressed width dimension;

a blade assembly mountingly supported by said support means, said blade assembly including a plurality of individual blades fixedly connected together so as to define a second predetermined pattern identical to said first pattern and received therein, each of said blades having first and second cutting surfaces spaced axially outward from inner and outer surfaces of said support means, each blade further having a predetermined thickness dimension which is substantially greater than said unstressed aperture width dimension whereby said blade assembly is retained in a desired supported position relative to said support means by a presss fit relationship generated between each of said blades and respective apertures.

2. The deburring tool as defined in claim 1 wherein said cylindrical housing includes means for gripping an exterior surface of the housing.

3. The deburring tool as defined in claim 1 wherein said individual blades are fastened together.

4. The deburring tool as defined in claim 1 wherein said cylindrical housing and support means are formed by casting.

5. The deburring tool as defined in claim 1 wherein said first and second cutting surfaces of each blade are bevelled for positive cutting action.

6. A deburring tool particularly for use in deburring inner and outer end portions of a generally tubular workpiece, said tool comprising:

a generally thin-walled cylindrical housing having a longitudinal axis extending between spaced apart first and second open ends;

a generally conical blade support integral with said housing at a housing interior surface, said blade support extending radially inward from said interior surface and terminating in an apex area at said longitudinal axis, said conical blade support including first and second opposed surfaces generally facing said housing first and second open ends, respectively;

said blade support having a plurality of apertures extending radially thereof and communicating between said first and second surfaces for defining a plurality of wedge portions, said apertures being generally equiangularly spaced apart from each other and each having an unstressed first predetermined width dimension;

a blade assembly comprised of a plurality of blades equal in number to said plurality of apertures, each blade being fixedly secured to the other blades at an apex zone in a generally equiangular spaced relationship to extend angularly away from said apex zone at substantially the same angle as said blade support extends from said apex area;

each of said blades having a second thickness dimension which is substantially greater than the unstressed first predetermined width dimension of each of said apertures, the individual blades of said blade assembly each being received in a press fit relationship by an associated aperture in said blade support such that said second blade thickness dimension is substantially equal to a stressed third predetermined width dimension of the apertures; and

,

each blade further including generally parallel first and second cutting surfaces, said first cutting surface being spaced axially outward from said blade support first surface and adapted for engaging an outer end portion of a generally tubular workpiece, and said second cutting surface being spaced outwardly from said blade support second surface and adapted for engaging an inner end portion of a generally tubular workpiece.

7. The deburring tool as defined in claim 6 wherein said cylindrical housing has means for gripping along an exterior surface thereof.

8. The deburring tool as defined in claim 6 wherein said cylindrical housing and conical blade support are cast from a zinc material.

9. The deburring tool as defined in claim 6 wherein said blade cutting surfaces are bevelled for positive cutting action.

10. The deburring tool as defined in claim 6 wherein said blades are fastened together.

11. A deburring tool for reaming inner and outer diameter surfaces of an associated workpiece comprising:

a generally cylindrical housing having first and second open ends spaced along a longitudinal axis;

a generally conical support member extending radially inward from a housing interior surface, said support member having a base portion disposed adjacent said first end and an apex adjacent said second end at said longitudinal axis;

said conical support member having plural, equal-sized, wedge-shaped members, said wedge-shaped members being spaced by apertures, each aperture having a first predetermined dimension;

a blade assembly including,

a plurality of substantially identical blades integrally joined together, each blade having a predetermined thickness dimension and parallel first and second angularly disposed cutting surfaces;

said first cutting surface of each blade spaced outwardly from said conical support member in generally facing relation with said first end and adapted for reaming an associated workpiece;

said second cutting surface of each blade spaced outwardly from an opposed surface of said conical support member in generally facing relation with said second end and adapted for reaming an inner diameter surface of an associated workpiece; and

,

said predetermined thickness dimension of each blade being substantially greater than said aperture first dimension and each blade being press fit into tight engaging relationship with said cylindrical housing.

12. The deburring tool as defined in claim 11 further comprising circumferentially spaced raised areas extending radially outwardly from a housing exterior surface facilitating grasping the deburring tool.

13. The deburring tool as defined in claim 11 wherein said blades are four in number.

14. The deburring tool as defined in claim 11 wherein said blades are fastened together.