WO2011104720A1

WO2011104720A1 - Insert type hand deburring blade/tool

Info

Publication number: WO2011104720A1
Application number: PCT/IN2010/000113
Authority: WO
Inventors: Chetan Prabhakar Purav
Original assignee: Chetan Prabhakar Purav
Priority date: 2010-02-26
Filing date: 2010-02-26
Publication date: 2011-09-01

Abstract

A crank-shaped deburring cutting holder is provided having a cutting edge insert being easily mounted on the holder and an arrangement provided at the front of the holder thereby providing of a circular movement of the cutting edge insert while deburring metal and plastic uniformly with high efficiency. In some embodiments of the invention, the cutting edge insert (a) can be set in different positions in order to bring forth a desired cutting edge, (b) can easily be replaced on the holder, (c) comprises at least one cutting edge having at least one insert profile and at least one cutting angle, (d) can be mounted one behind another insert on the holder thereby allowing possibility of deburring two different types of metal and plastic materials and (e) has different geometric shape of cutting angles thereby allowing the insert to cover deburring application on many types of metal and plastic materials.

Description

TITLE Insert Type Hand Deburring Blade/Tool

PREAMBLE OF INVENTION- This invention in particular describes the nature of the invention and the manner in which it is to be performed.

FIELD OF INVENTION - The disclosures made herein relate generally to an insert type hand deburring cutting tool consisting of multiple cutting edges, one side of which is having cutting edge portion called-insert and the other end is having crank shaped tool holder provided with a groove for fitting in to handle for easy working by means of the rotatary motion while cutting which will, be beneficial for the operation for deburring the edges holes, curvature of various metaUand- plastic uniformly with high efficiency. The insert portion of the tool can be set in different positi^ns¾^'ri order to bring forth the cutting edge to be used. The insert can easily be replaced on holder and iave single or multiple cutting edges in single or multiple profiles and cutting angles. The cutting tool is designed in such a manner as to enable one or more inserts to be mounted one behind another on the single holder thereby allowing possibility of deburring two different types of metal application. Also provided is a multi point insert having different geometric shape of cutting angles thereby allowing a single insert to cover deburring application on many type of materials.

PRIOR ART-

In the existing system as given in Indian Patent Application No. 1715/KOLNP/2007 - Patent Application wherein the said invention relates to a deburring tool having an indexable cutting insert having four cutting edges. The cutting insert has a main body portion and a guide groove. The cutting insert is slidably retained in an insert pocket with the main body portion of the insert located in a generally rectangular slot of the insert pocket and with the guide groove located and engaging a guide member portion of the insert pocket. The cutting insert is moveable between a retracted position and an extended position by means of a spring which biases the cutting insert towards the extended position. The sliding movement of the cutting insert is performed by the sliding of the guide member within the guide groove.

In the existing system as given in Indian Patent Application No. 134/KOL/2007 - Patent Application wherein said invention relates to an elliptical shaped formed tool for metal cutting of recess /radius forming comprises:- - a tool shank to which the cutting head is secured; - the formed tool cutting head provided with a cutting means constituted integrally with a high stiff and flexible string twisted wire and -the cutting head is provided with a aperture having a geometry matching the contour of the formable recess/radius.

In the existing system as given in Indian Patent Application No. 123/DEL/1998 - Granted Patent wherein said invention relates to deburring tool for deburring the edges of boreholes. The tool has a base body in which at least one recess aligned across the longitudinal axis of the base body is provided, where at least one blade is arranged in said recess so it can be displaced under spring load via the- longitudinal direction of the recess. A compression spring is provided in the longitudinal bore of the base body and comes in contact with one end of a control pin whose other end engages in a control recess in the blade to provide atleast a holding power to the blade in the direction of displacement.

In the existing system as given in Indian Patent Application No. 134/KOL/2007 - Patent Application wherein said invention relates to a deburring cutter for a deburring tool for deburring the edges of through-bores of a workpiece, which extends radially outward and is pushed radially outward against an elastic force, the deburring cutter having an approximately wedge-shaped cutting edge, which is connected by means of a control surface to a front face. The invention is characterized in that the cutting face on the deburring cutter is disposed at a negative angle toward the surface of the workpiece.

In the existing system as given in United States Patent Application No. 4777725 - Patent Application wherein said invention relates to a blade-holder capable of holding two different deburring blades and a deburring tool utilizing the blade-holder. The blade-holder comprises of a rod, two longitudinal bores, one at each end of the rod and releasable locking means situated in the regions of the longitudinal bores.

In the existing system as given in United States Patent Application No. 5135338 - Patent Application wherein said invention relates to a deburring tool with tilt blade for deburring bore edges whereby the tilt blade swings into the tool holder in a vertical direction when travelling through the bore. It features a locking device designed as bar spring which engages in a curve like recess at the outer periphery of the deburring blade or blade holder, whereby the deburring blade holder are arranged on a tilt bolt on the basic body.

In the existing system as given in United States Patent Application No. 4860453 - Patent Application wherein said invention relates to deburring tool that is provided having two sets of blades for use in simultaneously deburring the inner and outer edges of a piece of tubing, further including adjustment capability allowing the use of the tool in deburring tubing of different sizes, further including a cap recess cleaning tool, a cleaning brush and a base for mounting the deburring tool on a bench, table or the like.

In the existing system as given in United States Patent Application No. 7062858 - Patent Application wherein said invention relates to a hand tool for deburring is provided, as well as a cutting blade to be inserted into the tool, the tool comprising a housing, and a rotatable holding device, the holding device being positioned in and being rotatable in the housing and having a chamber for releasably holding a cutting blade, the chamber running obliquely to the axis of rotation (z) of the holding device. In the existing system as given in United States Patent Application No. 7524149 - Patent Application wherein said invention relates to a tool for countersinking, deburring and spindling out holes is described, consisting of a blade holder driven rotationally about its longitudinal axis, in which, at an angle to its longitudinal axis, at least one recess is arranged, in which one or more cutting blades or their holders are held as exchangeably and/or displaceably load-transmitting. In order to guarantee better protection against tilting and breaking of the cutting blade out of the recess in the blade holder it is provided that the recess is formed from radii substantially blending into one another.

In the existing system as given in European Patent Application No. EP 1579937 - Patent Application wherein said invention relates to deburring blade for deburring bore edges on workpieces containing at least one cutting blade , which has at least one cutting portion with at least one cutting edge and at least one control face, wherein the cutting blade is received in a tool holder, which can be rotated about a rotational axis in at least one rotational direction, characterized in that the at least one cutting portion has a first cutting edge, adjoined directly or indirectly by a second cutting edge, adjoined indirectly, via a transition, by a non-cutting free edge, which is set back radially with respect to the rotational axis in relation to the second cutting edge, the first cutting edge enclosing with the rotational axis an angle in the range of about 45° to 120°, typically 90°, and the second cutting edge, on the one hand, enclosing with the rotational axis an angle in the range of 0° to 90°, typically 45°, and, on the other hand, enclosing with the first cutting edge an exterior angle of greater than 180°.

OBJECT OF THE INVENTION - Traditionally, hand deburring cutting tool on swivel blade design have been in existence since past 40 years. These types of tools are one piece construction, normally made out of cutting tool material such as High Speed Steel. They are made by bending the tool blank in a crank shape, heat - treating them and then grinding in different profiles. These tools have been made in 2.6, 3.17 & 6 mm diameter. They generally have single cutting edge. But this invention provides for an innovative insert type hand deburring cutting tool consisting of multiple cutting edges and the other end is having crank shaped deburring cutting holder provided with a crank shaped tool holder provided with a groove for fitting in to handle for easy working by means of the rotatary motion while cutting which will be beneficial for the operation for deburring the edges holes, curvature of various metal and plastic uniformly with high efficiency. Thus instead of single cutting edge, this tool will have multiple cutting edges mounting on the same tool holder. This blade/tool can be used in any of the existing handles which take either 3.17 mm or 6 mm size of blades. The tool design is such that one or more inserts can be mounted one behind another on the single holder, thereby allowing possibility of deburring two different types of metal application. The multipoint insert have different geometric shape of cutting angles, thereby allowing a single inster to cover deburring application on many types of material.

STATEMENT OF INVENTION- The inventor has invented an innovative insert type hand deburring cutting tool consisting of multiple cutting edges, one side of which is having cutting edge portion called insert and the other end is having crank shaped tool holder provided with a groove for fitting in to handle for easy working by means of the rotatary motion while cutting which will be beneficial for the operation for deburring the edges holes, curvature of various metal and plastic uniformly with high efficiency

DETAILED DESCRIPTION OF INVENTION-

Accordingly, in one aspect, this invention provides for an innovative insert type hand deburring cutting tool consisting of multiple cutting edges, one side of which is having cutting edge portion called insert and the other end is having crank shaped tool holder provided with a groove for fitting in to handle for easy working by means of the rotatary motion while cutting which will be beneficial for the operation for deburring the edges holes, curvature of various metal and plastic uniformly with high efficiency. The insert portion of the tool can be set in different positions in order to bring forth the cutting edge to be used. The insert can easily be replaced on holder and have single or multiple cutting edges in single or multiple profiles and cutting angles. The cutting tool is designed in such a manner as to enable one or more inserts to be mounted one behind another on the single holder thereby allowing possibility of deburring two different types of metal application. Also provided is a multi point insert having different geometric shape of cutting angles thereby allowing a single insert to cover deburring application on many type of materials. The blade/tool can be used in any of the existing handles which take either 3.17 mm or 6 mm size of blades. The shape of the insert in this tool can be in any profile such as round or polygon. The tool is extremely cost effective in comparison to the existing single cutting edge deburring blades/tools because of multiple cutting edges and the common holder on which the insert can be replaced

Description of Tool :

Insert type Hand Deburring Tools / Blades Consists of

1. Crank Tool Holder

2. Insert

3. Washer

4. Lock Nut / Screw

Features of each part

Crank Tool holder

• Crank Tool holder can be one piece construction - bent in a crank shape, or it can be in multi-piece construction in a crank shape.

• The material of the crank tool holder is of steel or combination of steel & Engg. Plastics.

• The shaft of the crank tool holder can be in different diameters such as 6 mm (Crank Tool Holder 1) or 3.17 mm diameter (Crank Tool Holder 2) (Fig.: 5 & 6), such that it can be held in the handles which can hold these sizes of deburring blades resp.

• The shaft of the crank tool holder has a groove.

• The tool holder is held in the handle such that it can rotate around the axis of the handle.

• The Insert holder portion of the crank tool holder has the guide portion for the inserts.

• The insert holder portion has either threaded hole (Crank Holder 1 & 2) (Fig.: 5 & 6) or guide shaft with threads on front end (Crank Holder 3 & 4) (Fig.: 7 & 8) for positioning & clamping of inserts.

• The 'Guide Surface' has profile to match with the profile of the 'Insert'.

• Crank Tool Holder is a common holder on which Inserts can be replaced. Insert

• The 'Insert' is a cutting tool.

• The shape of the Insert can be Round or Polygon with hole in the centre.

• The insert can be indexed on the axis of Insert Holder portion of Crank Tool holder.

• The insert has one or more cutting edges.

• For the insert having more than one cutting edge, the cutting edge profile (Included angles), can be different, allowing deburring of different material application using the same insert.

• Sketch shows profile of some of the inserts. (Fig.: 9 & 10)

• One or more inserts can be mounted on the insert holder portion of the crank tool holder using the lock nut or screw.

• The material of the insert can be High Speed Steel (HSS), Carbide or Ceramic.

• The inserts can be coated for higher wear resistance & for less friction.

• The inserts are heat treated & ground and/or sintered.

• Once the cutting edge in use gets blunt, the insert can be indexed to bring forth the unused cutting edge.

• Usually cutting edge of approximately 2 mm (Cutting edge Portion 1 & 2) (Shown in Fig.:

11 & 12) near the face is useful for deburring purpose. The insert can be reversed on its face to utilize the entire length of the cutting edge.

• More than one insert can be mounted on the insert holder portion, interspaced with washer.

If two Inserts are mounted then the Tool/Blade can be used from 2 cutting edge portions without indexing the insert. After both these cutting edge portions get blunt, then the insert can be indexed to bring forth the new cutting edge.

• The two inserts mounted can be of different cutting edge profile. In this case the 2 cutting edge portions of the tool/blade can be used for deburring of 2 different materials.

Washer

• The 'Washer' is made out of steel or engineering plastics.

• They serve 2 purposes :

a) To interspace the 'Inserts' i.e. to separate the cutting edge portions of the inserts and b) To provide notch effect which prevents slipping out of tool/blade while deburring.

Lock Nut / Screw

• The lock Nut / Screw made out of steel is used to lock the inserts & washer on the inserts holder portion of the crank tool holder.

• The inserts & washer can be indexed around the axis of the screw /guide shaft.

Claims

CLAIMS I claim,

1. A insert type hand deburring cutting tool consisting of multiple cutting edges; cutting edge portion called insert being easily mounted on same crank-shaped deburring cutting holder; arrangement provided at the front of the extended holder portion thereby providing of a circular movement of cutting tool while deburring edge / holes / curvature of metal and plastic uniformly with high efficiency; insert portion of the tool that can be set in different positions in order to bring forth the cutting edge to be used; insert that can easily be replaced on holder; insert having single or multiple cutting edges in single or multiple profiles and cutting angles; tool designed in such a manner as to enable one or more inserts to be mounted one behind another on the single holder thereby allowing possibility of deburring two different types of metal application; multi point insert having different geometric shape of cutting angles thereby allowing a single insert to cover deburring application on many type of materials.

2. An insert type hand deburring cutting tool as cited in claim 1 , consisting of 1. Crank tool

Holder, 2. Insert 3. Washer and 4. Lock Nut / Screw

3. An insert type hand deburring cutting tool as cited in claim 1 , wherein the crank tool holder is either one piece construction bent in a crank shape, or multi-piece construction in a crank shape made up from steel or combination of steel & Engineering Plastics.

4. An insert type hand deburring cutting tool as cited in claim 1 , wherein the insert holder portion of the crank tool holder has the guide portion for the inserts and the guide portion has the profile to match with the profile of the insert.

5. An insert type hand deburring cutting tool as cited in claim 1 , wherein the insert holder portion has either threaded hole or guide shaft with threads on front end for positioning & clamping of inserts.

6. An insert type hand deburring cutting tool as cited in claim 1 , wherein the crank tool Holder is a common holder on which Inserts can be replaced.

7. An insert type hand deburring cutting tool as cited in claim 1, wherein the 'Insert' is a cutting tool having Round or Polygon shape with hole in the centre.

8. An insert type hand deburring cutting tool as cited in claim 1, wherein the 'Insert' is made up of High Speed Steel (HSS), Carbide or Ceramic and can be coated for higher wear resistance & for less friction. The inserts are heat-treated & ground and/or sintered.

9. An insert type hand deburring cutting tool as cited in claim 1 , wherein the 'Insert' can be

indexed on the axis of Insert Holder portion of Crank Tool holder.

10. An insert type hand deburring cutting tool as cited in claim 1, wherein the insert has one or more cutting edges,

11. An insert type hand deburring cutting tool as cited in claim 1 , wherein, for the insert having more than one cutting edge, the cutting edge profile (Included angles), can be different, allowing deburring of different material application using the same insert.

12. An insert type hand deburring cutting tool as cited in claim 1, wherein one or more inserts can be mounted on the insert holder portion of the crank tool holder using the lock nut or screw.

13. An insert type hand deburring cutting tool as cited in claim 1, wherein, once the cutting edge in use gets blunt, the insert can be indexed to bring forth the unused cutting edge.

14. An insert type hand deburring cutting tool as cited in claim 1, wherein the insert can be reversed on its face to utilize the entire length of the cutting edge.

15. An insert type hand deburring cutting tool as cited in claim 1, wherein more than one insert can be mounted on the insert holder portion, interspaced with washer.

16. An insert type hand deburring cutting tool as cited in claim 1, wherein incase two Inserts are mounted then the Tool/Blade can be used from 2 cutting edge portions without indexing the insert and after both these cutting edge portions get blunt, then the insert can be indexed to bring forth the new cutting edge.

17. An insert type hand deburring cutting tool as cited in claim 1, wherein two inserts mounted can be of different cutting edge profile, wherein the 2 cutting edge portions of the tool/blade can be used for deburring of 2 different materials.

18. An insert type hand deburring cutting tool as cited in claim 1, wherein the 'Washer' is made out of steel or engineering plastics serving two purpose, namely, interspacing the 'Inserts' i.e. to separate the cutting edge portions of the inserts and providing notch effect which prevents slipping out of tool/blade while deburring.

19. An insert type hand deburring cutting tool as cited in claim 1, wherein the inserts & washer can be indexed around the axis of the screw.