Title of Invention

" A DOUBLE STROKE/BLOW COLD HEADING MACHINE"

Abstract

This invention relates to an improved double stroke blow cold heading machine (1 A) comprises frame (1). forging slide assembly (2). wire box assembh (3). cutter box assembly (4). and wheel shall (6) chracterized in that the frame is provided with an additional bore (B) lor accommodating clutch shaft (6) which is connected with the pneumatic clutch assembly (5) at its one end mounted on a clutch wheel (71) and a pinion (8) at its other end engaged with a gear (9). said forging slide assembly comprises over am ram (10A) and a wedge (14). provided in front of upsetting slide.

Full Text

FIELD OF INVENTION This invention relates to an improved double stroke blow cold heading machine for the manufacture of head at one end of a rod like comoonent so as to produce holts and screws. PRIOR ART The double stroke cold heading machine for the manufacture of bolts and screws is as such known in the art. The machine comprises a pai of big and heavy momentum wheels mounted on a crank shaft in order to provide to an fro movement to the forging ram provided to make a head at one end of a rod like component. The forging ram is mounted on the wearing surfaces provided at the front end of the main frame cf the machine. The motive driving means are provided with the main frame of the machine so as to provide rotational movement to one of the momentum wheels. Punch pressure adjusting wedge is provided at the rear end of the forging ram. There are disadvantages associated with the eold heading machine as such known in the art. One of the main disadvantages is that the motive means of large power is required to start the machine as the wheels are big and heavy. Another disadvantage is that a lot of time is required to bring the machine into the running conditions. Similarly to stop the machine it takes a long time due to the momentum produced by the big and heavy wheels. Still another disadvantage is that more skilled labour is required to operate the machine. Yet another disadvantage is that wear and tear of the forging ram is more as the waste material from the die falls on the wearing surface. j A further disadvantage is that the raw material is wasted as the cut piece cannot be placed in the die manually and easily due to long start/stop time of the machine. Still another disadvantage is that when ever one safety pin out of another safety pin provide at different load taking points get sheared, the machine remains in motion which results raw mate wastage and tooling breakage/dam ages. Yet another disadvantage is that the Forging Slide is fitted in such a way that the bearing/wearing surfaces are exposed to dust, chips of raw material and drawing powder stuck to raw material, which play a role of an abrasive mass to ruin/deface the bearing/wearing surfaces resulting in poor quality of bolts and screws forged on the machine. Another disadvantage is that the length of bearing/wearing surfaces of Forging Slide is so short that it is unable to keep itself as well as punch (mounted on the front side of Forging Slide) aligned with Die so as to get accurate forged bolts/screws. Therefore the main object of this invention is to provide a double stroke cold heading machine which obviates the disadvantages associated with the prior art. Another object of the invention is to provide a double stroke/blow cold heading machine having the bearing/wearing surfaces at the front as well as the rear end more importantly at the top surface of forging slide and higher than the level where the raw material is fed into the machine. Yet another object of this invention is to provide a double stroke/blow heading machine having punch pressure wedge at the front end of forging slide means and behind the punch portion/area which is nearer and easily accessible to operator avoiding extra labour to adjust the pressure on the punch easily and quickly. Still another object of this invention is to provide a double stroke cold heading machine wherein the use of big and heavy momentum wheels has been avoided. Another object of this invention is to provide a double stroke cold heading machine having the pinion and gear arrangement provided at the other end of the crank shaft which results in less power consumption. Another object of this invention is to provide a cold heading machine having a pneumatic clutch system provided with a driving wheel/fly wheel of the machine so as to connect and disconnect the operation of the machine from the driving wheel as and when required which facilitates the operator to bring the machine in motion and break/stop the motion within fraction of second. Apart from this machine take a little time for adjustments at the- time of loading next job on machine. Another object of the invention is it provide a Double Stroke/blow C'old Heading Machine having a longer bearing/wearing surfaces to forging slide with " 1" section & over arm within the available space in the main frame of the machine withoui covering extra space than conventional machine. Another object of the invention is to piovide a double stroke;hlow cold heading machine having the automatic safely system which is possible only because of uniquely fitted pneumatic clutch which disengages and stop whole machine in case of any saielv pin shearing provided at different load taking points like cutting knife and kick out system of forged components. STATEMENT OF THE INVENTION According to this invention there is provided an improved double stroke blow cold heading machine comprises frame, forging slide assembly, wire box assembly, cutler box assembly, and wheel shaft chraclerized in that the frame is provided wish an additional bore (B) for accommodating clutch shall which is coniueted with the pneumatic clutch assembly at its one end mounted on a clutch wheel and a pinion at its other end engaged with a gear, said forging slide assembly comprises over arm rani and a wedge, provided in front of upsetting slide. BRIEF PESCRITP1ON OF THE ACCOMPANYING DRAWINGS. Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein: Fig.l shows: the machine of the present invent on Fig. 2 show: frame of the present invention Fig. 3 shows: Forging Slide Sub assemblv of the oresent invention Fig. 4 shows: Pneumatic clutch sub assembly of the present invention Fig. 5 shows: clutch shaft of the present invent on DESCRITPION OF THE INVENTION WITH REFERENCE TO ACCOMPANYING DRAWINGS According to this invention there is provided a double stroke/blow cold heading machine (1A), which comprises frame (1), Forging Slide Sub Assembly (2), Wire Box Sub Assembly (3), Cutter Box Sub Assembly (4), Pneumatic Clutch Sub Assembly (5), Wheel Shaft (6). Reference is made to figs 1-6. The machine of the present invention comprising a driving wheel (5) provided at one side of an axle mounted at the rear end of the main frame (1) of the machine, a pinion (8) being mounted on the other end of the axle such that to be engaged with a gear (9) (with a noticeable gear ratio 1:4), mounted on the crank shaft (7) of the machine provided for giving movement to the forging ram (because higher the ratio of gear and the pinion lesser the power is required), bearing surfaces (10A) are provided at the front as well as at the rear end near the top surface of the forging ram (10), punch pressure adjusting wedge (14) being provided just behind the die area so as to adjust the punch pressure of the forging ram. In accordance with this invention the double stroke/blow stroke cold heading machine has a main frame (1) for supporting a driving wheel (5) mounted on one side of an axle (6) provided rotatably at the rear end of the frame. A pinion/driving gear is secured at the other end of the axle such that to be engaged with a driven gear (9) mounted on the crank shaft (7) supported rotatably on the main frame of the machine for providing to and fro movement to a forging ram (10). Wearing surfaces are provided at the front and rear ends of the forging ram and main frame of the machine near the top surfaces thereof. Punch pressure adjusting means (14) are provided just behind the forging rain so as to adjust the punch pressure of the forging ram as and when required by the operator of the machine. A pneumatic clutch arrangement is provided with the driving wheel of the machine so as to connect and disconnect the driving wheel with the axle so as to stop and start the operation of the machine as and when required by the operator. Fig. 2 shows main frame (1) also called Body. It is made of for example Cast Iron. Gun Metal/Cast Iron Bushes are fitted in each bore after grinding/polishing of boring faces. Every working faces are scrapped before the assembly. The present invention is provided with an extra bore. Fig. 1 shows the machine of the present invention wherein shaft (6) connects pneumatic clutch at one end and pinion (8) at the other end. The clutch gets engaged when wheel rotates due to the supply of air and electricity. The pinion is engaged with gear (9), which is mounted on a crank shaft (7). The crank shaft is connected to connecting rod (11) with the motion of the connecting rod, the whole forging slide sub assembly starts moving. Forging slide moves to and fro and upsetting slide moves up and down. The machine is provided with gear and pinion to reduce electricity consumption and thus economize the operations. Fig. 3 shows forging slide sub assembly. Forging slide (10) is mounted with connecting rod (11) with the help of Forging Slide Pin (12). Forging Slide travels in the main frame with the help of connecting rod (11). The connecting rod is having for example Phosphorus Bronze bushes for extra strength. The connecting rod is connected with Crank shaft (7). Forging slide bottom face and side face slides with main frame. Hard plates (not illustrated) are mounted in the main frame on bottom and side surfaces of forging slides. Up setting slide (13) travels vertically in forging slide. A Gun metal Gib (16) is also provided for setting the up setting slide. 1st punch (22) and 2nd punch (21) are mounted in Punch holder (15) holes and locked from top face with fasteners. The punch holder is mounted on up setting slide with the help of four studs (20). Adjustment clamp (19) is mounted on up setting slide for horizontal adjustment and the vertical adjustment which is done by wedge (14). The machine is provided with over arm T-type ram (10A) which has got three times more bearing surfaces than that of conventional. Therefore, the headers are most suitable for forging precision parts. Forging slide gets more guidance due to more bearing surface. This leads to improved quality of final product. Further, the wedge (14) is provided in front of upsetting slide (13). The wedge is used to move first and second punch (22 and 21) for required setting, whereas in prior art the wedge is placed in front of the connecting rod. To move the punch, the whole forging slide is required to be moved along with the wedge which needs more time and energy. The present invention involves easy setting which requires less time and energy. Fig. 4 shows a pneumatic clutch which comprises: 1. Wheel (71) 2. Ring (72) 3. Fabricated rotor (78) 4. Internal Clutch Plate (75) 5. External Clutch Plate (76) 6. Pressure Plate Assy (73) 7. Bearing (79) 8. Bearing Cover (80) 9. Bearing Cover (81) 10. Hex Bolt (82) 11. Hex bolt (77) 12. Dowel Pin (83) 13. Allen Bolt (74) The Pneumatic clutch has been designed for immediate action of braking and releasing system. Pneumatic clutch mounted on the wheel shaft. Wheel (71) rotates with the help of motor (mounted on motor mounting stand). Air pressure goes in the clutch. Air pressure tightens the pressure plates (75 & 76) so that inner and outer clutch plates are engaged with clutch ring (72). The clutch ring is mounted on the clutch wheel by bolts and dowels. So that wheel shaft rotates and the machine works. When air pressure is released from clutch, clutch plates get disengaged to stop machine, immediately. Internal clutch plate is having teeth inside its bore and external clutch plate is having teeth around its circumference. Pressure plate assembly (73) is major part of clutch (5). Through the pressure plate assembly Pressure goes to pressure plates (75 and 76). At that time clutch gets engaged to bring the machine into motion. When pressure is released through (73), the clutch is disengaged and the pressure plate assembly works as a brake to machine. The ring (72) gives movement to the outer plates (76) which after being given pressure brings the inner plates (75) in to motion. Clutch rotor (78) is provided around the shaft (6). When inner plates get engaged, it gives motion to the rotor to make the machine work. The machine is equipped with the pneumatic clutch brake, and special safety system which stops the machine instantaneously in case of air pressure failure, low level of lubricants or any other irregularity. Fig. 5 shows: Wheel shaft (6) also called a back shaft. The clutch wheel and pinion are mounted on this shaft. Bearings are provided on the shaft (6) to smoothen movement of the shaft. Fig. 6 shows Crankshaft (7) which gives to and fro motion to the forging slide. Connecting rod is also mounted on this crankshaft. Thus it is seen that the big/heavy momentum/fly wheels are not used in the machine of the present invention and therefore the motive/driving means of the large power is not required. Further, as the clutch arrangement is provided the machine can he stopped with in no time and similarly the machine can be brought to the running condition in a very little time. Hence, accident can be prevented immediately. Further, as the punch pressure adjusting means are provided just behind the punch area of the forging ram the punch pressure is adjusted very easily and quickly avoiding additional worker. The machine has got more accuracy due to long forging slide. Also the machine can be stopped easily and the rod like iron/steel piece can be put into the die manually and thus the wastage of the raw material is minimized. The whole machine is perfectly covered for safety, longer machine-life and lesser maintenance costs. The machine is constructed for high stability. For longer life of bearing surfaces and bushes automatic centralized lubrication system provides adequate quantity of lubricant. The invention results in increased productivity at lower operational cost and man power. It is to be noted that the present invention is susceptible modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:- I CLAIM 1. An improved double stroke blow cold heading machine (1A) comprises frame (1), forging slide assembly (2), wire box assembly (3), cutter box assembly (4). and wheel shaft (6) chracterized in that the frame is provided with an additional bore (B) for accommodating clutch shaft (6) which is connected with the pneumatic clutch assembly (5) at its one end mounted on a clutch wheel (71) and a pinion (8) at its other end engaged with a gear (9), said forging slide assembly comprises over arm ram (10A) and a wedge (14). provided in front of upsetting slide. 2. An improved double stroke blow cold reading machine as claimed in claim 1 wherein the said frame is made of cast iron. 3. An improved double stroke blow cold reading machine as claimed in claim 1 wherein the said bore is fitted with gun metal or cassion bush. 4. An improved double stroke blow cold 1 etding machine as claimed in claim 1 wherein the said over arm ram is T-type. 5. An improved double stroke blow clod 1 etding machine as claimed in claim 1 wherein the said pneumatic clutch assembly comprises clutch wheel (71). clutch ring (72), pressure plate assembly (73). internal and external clutch plate (75 and 76) and clutch rotor (78). 6. An improved double stoke blow cold heading machine as claimed in claim 5 wherein said clutch ring (72) is mounted on the clutch wheel by bolts and dowels (82. 77. 74. 83). 7. An improved double stroke blow cold reading machine as claimed in claim 5 wherein the said clutch rotor is provided around the said clutch shaft. 8. An improved double stroke blow cold reading machine as claimed in claim 5 wherein the said internal and external clutch plate s having teeth inside its said bore and around its circumference. 9. An improved double stroke blow cold leading machine substantially as herein described with reference to accompanying drawirgs.

Documents:

2561-del-2004-abstract.pdf

2561-del-2004-claims.pdf

2561-del-2004-correspondence-others.pdf

2561-del-2004-correspondence-po.pdf

2561-del-2004-description (complete).pdf

2561-del-2004-drawings.pdf

2561-del-2004-form-1.pdf

2561-del-2004-form-18.pdf

2561-del-2004-form-2.pdf

2561-del-2004-form-3.pdf

2561-del-2004-form-9.pdf

2561-del-2004-gpa.pdf