US2659906A

US2659906A - Heading and like machine

Info

Publication number: US2659906A
Application number: US294434A
Authority: US
Inventors: Watt Alexander Basil
Original assignee: GKN Group Services Ltd
Current assignee: GKN Group Services Ltd
Priority date: 1952-06-19
Filing date: 1952-06-19
Publication date: 1953-11-24
Anticipated expiration: 1970-11-24

Description

Nov; 24, 1953 A, WATT 2,659,906

HEADING AND LIKE MACHINE Filed June 19, 1952 4 Sheets$heet 1 FIG.

INVENTOE Nov. 24, 1953 WATT 2,659,906

HEADING AND LIKE MACHINE Filed June 19, 1952 4 Sheets-Sheet 2 INVENTOK a& Hu Alzaf BY MWSBw AW Nov. 24, 1953 WATT 2,659,906

' HEADING AND LIKE MACHINE File d June 19, 1952 v 4 Sheets-Sheet 5 kg m o :1 m l ba 8 8 xBY" 1 AGENTS V Nov. 24, 1953 A. B. WATT $659 906 HEADING AND LIKE MACHINE Filed June 19, 1952 4 Sheets-Sheet 4 v INVENTOE I g I BY W QM QMM i AENTG Patented Nov. 24, 1953 HEADING AND LIKE MACHINE Alexander Basil Watt, Handsworth, Birmingham, England, assignor to G. K. N. Group Services Limited, Smethwick, England, a British com- Application June 19, 1952, Serial No. 294,434

6 Claims.

i This invention relates to heading and like machines of the kind having a body in the face of which is an opening containing a die into which the work is fed, and a reciprocating ram having a head upon which is mounted a movable punch carrier carrying two spaced punches, the carrier being movable transversely to the movement of the ram so as to make it possible to bring the punches into action alternately, automatic means being provided for so moving the carrier. In such machines the punches may be shaped to form a head upon the work, or to form a recess in the end of the work, and the operation is unusually carried out at room temperatures.

Hitherto in such machines the means for producing the transverse movement of the carrier has included a spring-loaded block sliding in a slot in an oscillating lever. In such mechanism the friction between the sliding block and the slot in the lever in the course of time produces wear, with the result that the machines have to be taken out of service from time to time for repair. Further in such mechanism the stresses applied to some of the working parts are bending stresses so that these parts have to be of robust and relatively heavy construction. In the construction in accordance with the present invention the stresses applied to the working parts are mainly in the form of tension or compression with the result that such parts can be of lighter construction than hitherto thus enabling the machine to be driven at a higher speed than is the case with existing constructions.

The object of the present invention is to provide improved automatic means for producing the transverse movement of the carrier.

According to the present invention the transverse movement of the carrier is produced by mechanism including a floating member which is moved by a pair of parallel links of equal length, the floating member being connected to the ram and to the carrier, or to carrier-actuating mechanism by further links, the parallel links being operable at any position of the ram to move the carrier from one end of its travel to the other. Such movement takes place dur ing the periods when the punches are not in engagement with the work.

Further, the mechanism for producing the movement of the carrier may comprise a floating member to which are pivoted a pair of primary links and a pair of secondary links all operating in the same or parallel planes at right angles to the face of the body and parallel to the direction of movement of the ram, the two primary links being of the same length and being parallel'to each other, one of the primary links being pivotally connected to the carrier, or to carrieractuating mechanism, and the other being pivoted to the ram, the two secondary links being of the same length and being parallel to each other and pivoted to the floating member at one pair of ends, and the other end of one of them being pivotally mounted at a'fixed point and the other end of the secondary line being pivoted to a lever which is caused to oscillate about the said fixed point. With this arrangement the carrier can be moved from one position to the other at any position of the ram by turning the lever.

Stops may be provided on the head adapted to be engaged by a projecting lug on the carrier at each end of its movement.

The invention is illustrated in the accompanying drawings wherein:

Figure 1 is a section in side elevation of one type of heading machine embodying the present invention.

Figure 2 is a section on the line 2-2 in Figure 1.

Figure 3 is a view of the head of this type of machine showing a modification.

Figure 4 is a section in side elevation of another type of heading machine embodying the present invention.

Figure 5 is a section on the line 5-5in Figure 4.

Figure 6 is a view showing the mechanism of Figure 4 in the other extreme position.

Figure 7 is a section on the line '|-1 in Figure 6. f v

In the constructions shown in Figures 1 to 3 the body, die, ram and head are constructed as usual, the body ID having a die H with an opening l2 into which the stock is fed and the, ram [3 being mounted in guides. H! for reciprocation by crank and pitman 15 from the shaft 16.. The carrier is in the form of a slide I! mounted for rectilinear reciprocating movement on thehead [8 of the ram. t

The operating mechanism for producing the reciprocating movement of the slide H incorpo rates a floating member IS which may be formed as a metal plate, or may be fabricated, and which may be of approximately triangular shape as shown, although this is for convenience only, the actual shape of the plate being of no major importance as regards the working of the mechanism.

The head I8 of the ram is provided with a projecting lug 26 and the slide ll is also provided with projecting lugs 2| and these lugs are con- 3 nected to the floating member [9 by a pair of spaced

links

22 and 23, which are of the same length. In the construction of Figure 1 these links are pivotally connected at one pair of ends to the said lugs and at the other pair of ends to the floating member l9 and are parallel.

In the alternative construction shown in Figure 3 these two links, which are the primary links, are connected by a third link 24 pivotally connected between the ends of the primary links which are adjacent to the head andslide, andin this arrangement a third link 25 is pivoted at one end to the lug 2| on the slide and at the opposite end it is pivoted to the primary link 2-3.

In both constructions the floating member it is moved by a pair of secondary links 26 and 2'? which are always parallel and are of. the same length, and one of these links, namely 28, is pivoted to a fixed bracket 28 upon which is pivoted, about the same axis, a control lever 29 to which'is-alsc. pivoted the other of these secondary links, namely 21. The control lever 29 isoscillated by providing its opposite end with a roller 30- which engages a rotating cam 3|, the roller 30 being kept in contact with the periphery of the cam 3'! by suitable spring means, such as spring 3-2 acting onthe arm 33 fixed onthe pivotalaxis 34.

The cam is fixed upon a shaft 55 on which isfixed a gear wheel 35 meshing with a gear wheel 31. on the shaft l6; the ratio between these wheels being 2:1.

The operation of the mechanism is as follows: commencing from the position shown in Figure l the roller 30 travels the dwell portion 38 whilst the ram moves from right to left and the upper punch 35 engagesthe. stock in the die I l. On the return stroke the rise portion 5'0 of cam 3! causes the link mechanism to move the punch slide ll vertically so that the lower punch ll is brought intoline with the die for the next forward (right to left.) stroke when the roller 35 travelsthe dwell portion 42. On the next return stroke the roller 30' travels thefall portion of cam 3i and the link. mechanism returns the slide to its original position.

Limiting stops 43 are preferably provided on the head l8 to be engaged by a lug M on the slide I1 and there may also be positioning means, such: as generally indicated at 45.

In the construction shown in Figures 4 to '7, the invention is shown applied to a heading machine of the type in which the punches are mounted in a carrier which is rotated about an axis parallel to the direction of reciprocating of the ram.

tobringthe punches alternatively into the operative position. The arrangement of the body, die, ram: and ram operating mechanism is the same as in the previous construction but in this construction the punch carrier 45, carrying the. punches 41 and 48: is mounted on the end of a which meshes with a bevel gear 58 on the end of the shaft 49. The link mechanism is similar to that shown in the previous construction and comi prises a floating member 59 to which are connected the primary links 60, BI and the secondary links 62, 63.

A lever 64 is fixed to the end of shaft 55 and the link 6| is pivotally connected to the end of said lever. The other link 60 is pivotally connected to the end of shaft 55. The mechanism is operated as before by a cam and the movement of the mechanism caused by the cam causes oscillation of the shaft 49 so as to bring the

punches

47, 48, successively into the operative position for acting on the stock which is in the die. Figure 4 shows the mechanism in one extreme position at the beginning of a forward stroke of the ram and Figure 6 shows the mechanism in the other extreme position at the beginning: of the next forward stroke, the shaft 49 having been turned to bring the other punch into the operative position.

In either construction the movement of the carrier in one direction may be produced by the action of spring means as shewn or alternatively a cam may be used having a groove on its periphcry or face for producing the movement inboth directions. In a further alternative two cams may be used, one producing it in the reverse direction.

What I claim then is:

1. In a heading machine of the kind having a die through which stock is fedand a reciprocating ram having a head'upon which is mounted a movable punch carrier carrying two spaced punches, the carrier being movable transversely to the direction of movement of' the rain to bring the punches into action alternately; mechanism for moving the carrier transversely comprising, a member mounted for floating movement, a pair of primary links, parallel and of equal length, one connecting said floating member to the ram and one connecting said floating memher to the punch carrier, a pair of secondary links, parallel and of equal length acting at one pair of ends on said member and operating means acting on the other pair of ends of said parallel links said operating means being driven in timed relationship with the reciprocation of the ram tocause periodic movement of the punch carrier from one end of its travel to the other.

2.v In a headingv machineof the kind having a die through which stock. is fed. anda reciprocating ram having a head. upon which is mounted a movable punch carrier carrying two spaced punches, the carrier being. movable transversely to the direction of. movement of the rain to bring the punches into. action alternately; mechanism for moving the carrier transversely comprising, a member mounted forfloatingv movement, a pair of primary links anda pair of secondary links, said links being disposed. in the. same or parallel planes all parallel to the direction of movement of the ram, the twoprimary links being of equal length and parallel. to each. other. and being pivotally connected atone pair of ends to said floating member, at the other end, one primary link being pivotally connected to: the carrier and the other being pivotally connected to the ram, said two secondary links being of. equal length and parallel to each other. and pivotally connected to the floating member at one pair of ends, at the other end, one of' said secondary links being pivotally mounted at a point fixed in relation tothe fixed parts of the machine, an operating. lever pivotally connected to the other secondary link. at this other end and means for causing oscillation of said: operating lever about 5 the axis of said fixed point in timed relationship with the reciprocation of the ram.

3. A heading machine according to claim 2 wherein the operating lever is moved by means of a rotatable cam which is driven in timed relationship with the reciprocation of the ram.

4. A heading machine according to claim 2 wherein the carrier is in the form of a slide mounted on the head of the ram for reciprocation thereon in a direction at right angles to the direction-0f movement of the ram, one of the primary links being pivotally connected to the head of the ram and the other being pivotally connected to the slide.

5. A heading machine according to claim 2 wherein the carrier is in the form of a slide mounted on the head of the ram for reciprocation thereon in a direction at right angles to the direction of movement of the ram, one of the primary links being pivotally connected at one end to the head of the ram, the other primary link being pivotally connected at one end to one end of a link the other end of which is pivotally connected to the slide and a further link pivotally connected at its ends to the said ends of the primary links.

6. A heading machine according to claim 2 wherein the carrier is mounted on the end of a shaft which is rotatably mounted in or on the ram parallel to the direction of movement of the ram, said shaft being adapted to be oscillated by a further shaft carried by the ram one of said primary links being pivoted at one end on said further shaft and the other primary link being pivotally connected to one end of a lever the other end of which is fixed to said further shaft.

ALEXANDER BASIL WATT.

References Cited in the file of this patent UNITED STATES PATENTS Number