Title of Invention

MULTIPURPOSE MACHINE FOR INTERNAL & EXTERNAL THREAD FORMING

Abstract

A multipurpose machine for internal and external thread forming and cutting of hollow profiles comprising a cutting tool (1) which is fixed on a roller support (2) form both sides and the component (3) is mounted on the fixture (4) driven by two synchronize eccentric (5) generating motion, eccentricity altered through differential motion (6) thereby forming internal and external threads without dimple, without burr, without scrap and without deformation, wherein the prome mover moves to the two eccentric through the differential motion through a train of gears.

Full Text

FORM 2 THE PATENTS ACT, 197 0 (39 of 1970) COMPLETE SPECIFICATION [See Section 10, rule 13) A MULTIPURPOSE MACHINE FOR INTERNAL & EXTERNAL THREAD FORMING; SUDERSHAN MADHOPRASAD SARAF of 3 0 RAZAT APARTMENT, MOUNT PLESANT ROAD, MUMBAI - 4 00 0 06, INDIA, INDIAN national The following specification particularly describes the nature of the invention and the manner in which it is to be performed : - 30 MAR 2005 The invention relates to a device for forming of threads and cutting of hollow profile. More particularly the invention relates to a device where there is a versatile use for cutting any shape round, square, oval, rectangular. The invention provides no formation of dimple or burr or forming as well as profile cutting whereas in the conventional process of tube-cutting on tube-mill adopts any of the following techniques. 1) Cold Saw : Here the disadvantages is the formation of burr and scrap generation. 2) Friction Saw : The disadvantages associated with this type of process is formation of burr and scrap formation. 3) Slitting Cutter : In this method it is suitable for round section and inside diameter deforms while cutting. 4) Single Die : Formation of dimple and suitable for cutting only of round section. 5) Double die : Scrap generation and only suitable for cutting round section. The main, object of the invention is to provide a device for forming of threads and cutting of hollow profile which is versatile in nature can be used for all types of section cutting whether round, square, oval. The another object of the invention of a device for forming of threads and cutting of hollow profile which produce negligible scrap. - : 2 :- Still further object of the invention is to provide cut surface where there are no dimple formation and no burn formation and no scrap generation. Another object of the invention is to provide wherein the job will not deform inside and produce smooth cut surface. The device can be used for section cutting, internal and external thread forming without need of any rotary tool. The component profile is held on to a fixture on a ram and the tool movement with respect to the component is out of generation which is decided by two synchronised eccentrics. This generates cutting motion or forming motion without need of rotating tools in feeding into component as in conventional processes. Same machine as for cutting can be used to generate internal and external threads in component by metal forming. This greatly improves tool life as tool does not rotate on a spindle but it is fixed such as any press tool. Therefore, over hangs inevitable in rotary tools are greatly reduced and rigidity is greatly enhanced. Description for Thread Forming Tool is a fixed roller supported from both ends and component is mounted on a fixture on a ram that is driven by two synchronize eccentrics. Generating motion is shown in Fig. 2 and threads shall be formed internally and unlike conventional process. Neither tool nor the component rotate about their own axis or even about any other axis. All other existing process require tool or component or both to rotate about their axis. - : 3 :- Accordingly there is provided a multipurpose machine for internal and external thread forming and cutting of hollow profiles comprising a cutting tool (1) which is fiexd on a roller support (2) form both sides and the component (3) is mounted on the fixture (4) driven by two synchronize eccentric (5) generating motion, eccentricity althered through differential motion (6) thereby forming internal and external threads without dimple, without burr, without scrap and without deformation wherein the' prome mover moves to the two eccentric through the differential motion through a train of gears. Description for Tool Cutting Device for profile cutting and thread forming comprising a cuttinh tool (1) which is fixed on a roller support (2) from both the side and the component (3) is mounted on a fixture on a ram (4) driven by 2 synchronize eccenties (5) generating motion, eccentricity altered through differential mechanism (6) threads internally formed, unlike conventional processes, neither the tool nor the component rotate their own axis or even about any other axis. The invention will now be clear from the following descriptions : In Fig. 1, 2, 3 and 4 of the accompanying drawing. : Fig. 1 is a plan and elevation of thread generating machine of a device for forming of threads. Fig. 2 shows various stages and sequence of thread generation of a device for forming of threads. Fig. 3 is a plan elevation of machine of pipe/hollow profile section cutting. Fig. 4 shows various stages and segments of cutting mechanism by generating motion for profile cutting. - 4 - Referring to Fig. 1 to 4 both the eccentrics are driven by prime mover and differential motion is given through a train of gears to alter . eccentricity and forming of threads and cutting of profiles is due to the generating mechanism as shown in Fig. 2 and 4. The tool is fixed on a housing sliding in case of thread forming and fixed in case of profile cutting and component is inserted on fixture which is mounted on a ram having X and Y axis movement which is generated through two eccentrics thereby thread is formed or the profile is cut. The cutting of smooth profile of any shape is carried out easily without any difficulty by the improve device; no burr formation, no scrap no dimple formation thereby the profile cutting is smooth and sharp. Forming of thread is purely by generation method without and rotary motion of tools or components thereby tool is more rigid and can be rigidly supported from both end. The inventor has done a unique invention of developing economic method of carrying out the forming of threads and profile cutting on same machine. The prime mover with the help of differential motion through the train of gears give motion to the ram by the help of two eccentrics. This is an embodiment of the invention, several modifications are possible may be considered within the ambit and spirit of this invention. Since many modifications, variations and changes in detail may be made to the above described embodiments, it is intended that all matters described in the foregoing description as described in the accompanying specification. - : 5 : - I CLAIM: 1. A multipurpose machine for internal and external thread forming and cutting of hollow profiles comprising a cutting tool (1) which is fixed on a roller support (2) form both sides and the component (3) is mounted on the fixture (4) driven by two synchronize eccentric (5) generating motion, eccentricity altered through differential motion (6) thereby forming internal and external threads without dimple, without burr, without scrap and without deformation, wherein the prome mover moves to the two eccentric through the differential motion through a train of gears. 2. A device for forming threads and cutting of hollow profile as claimed in claim 1 substentially herein described and illustrated in Fig. 1 to 3 in the accompanying drawings. Dated this 18th day of February, 2002. HIRAL CHANDRAKANT JOSHI AGENT FOR SUDARSHAN MADHOPRASAD SARAF 6

Documents:

170-mum-2002-cancelled pages(30-03-2005).pdf

170-mum-2002-claims(granted)-(30-03-2005).doc

170-mum-2002-claims(granted)-(30-03-2005).pdf

170-mum-2002-correspondence(05-04-2005).pdf

170-mum-2002-correspondence(ipo)-(21-03-2005).pdf

170-mum-2002-drawings(21-02-2002).pdf

170-mum-2002-form 1(30-03-2005).pdf

170-mum-2002-form 19(16-02-2004).pdf

170-mum-2002-form 2(granted)-(30-03-2005).doc

170-mum-2002-form 2(granted)-(30-03-2005).pdf

170-mum-2002-form 3(21-02-2002).pdf

170-mum-2002-power of attorney(21-02-2002).pdf

abstract1.jpg