US1812366A - Taper turner - Google Patents

Description

June 30, 1931. Y Q A PERRY 1,812,366

TAPER TURNER Filed Dec. 21, 1928 3 Sheets-Sheet l June 30, 1931. G. A. PERRY l TAPER TURNER Filed Dec.\` 2l, 1928 3 Sheets-Sheet 2 June 30, 1931. G, A PERRY '1,812,366

' TAPER TURNER I Filed Dec. 21. 1928 3 Sheets-Sheet I5i l: I r... l

WMMMWM Patented June 30, 1931 NETE@ STATES PATENT OFFIC GEORGE A. PERRY, OF SPRINGFIELD, VERMONT, ASSIGNOR TO JONES & LAMSON MA- CHINE OOMPANY, OF SPRINGFIELD, VERMONT, A CORFORATION OF VERMONT TAPER TURNER Application filed December 21, 1928.

It kis sometimes desired to turn a. taper from rough stock, and in order that springing of the work under pressure of the tool `may be minimized, it is desirable and often necessary to support the work substantially this smooth surface is tapering, the support must be controlled to move relative to the axis of the work to follow the taper as the tool and support are moved axially of the work.

There are times, however, when it is desirable to turn the taper after the work has first been turned cylindrical. The support may then precede the tool axially, being guided by the cylindrical part of the work and being lixed in its distance from the work axis.

This invention has for one object, therefore, to produce a taper turner in which either method of supporting the work may be used as desired, the support preceding the tool and being held at a fixed distance from the work axis when-turned cylindrical work is being turned taper, and following the tool on the tapered part of the work and moving relative to the axis of the work as it is moved longitudinally thereof to follow the taper 0 when rough work is being turned taper. To

this end the support for the work, which preferably comprises a pair of work engaging elements angularly spaced about the work axis substantially opposite to the tool is so constructed that the work engaging elements may selectively be so controlled as to be moved relative to the work axis in accordance with the taper as they are moved axially,

or to be held at a fixed distance from the axis,

and the tool is so arranged relatively to these engaging elements that it precedes or follows these elements in axial movement in accordance with the element control selected.

Further objects and advantageous con- 5 structions will more fully appear from a more complete description of an embodiment thereof illustrated in the accompanying drawings in which Figure l is an end elevation of the mecha-- nism, the taper controlling cam and the work Serial No. 327,566.

being shown in section, the tool and work supporting element being retracted.

Figure la is a detail section on line lez-la of Figure l.

Figure 2 is a top plan of the same mechamsm.

Figure 3 is a vertical section on line 3-3 of Figure 2 showing the parts adjusted for taper guiding engagement.

Figure el is a fragmentary view similar to a portion of Figure 3 but with the parts adjusted to cylindrical guiding engagement, the tool being retracted.

Figure 5 is a rear elevation of the mechanism.

Figure 6 is a horizontal section on line 6 6 of Figure 3, the tool slide spring being omitted.

Figures 7 and 8 are fragmentary views partly in section showing relative positions of one of the work guiding elements and the tool for taper and cylindrical work-guiding, respectively.

Figures 9 and 10 are detail perspectives of certain parts of the mechanism.

Figure 1l is a section on the plane of lines ll-ll of Figure 9.

Figure l2 is a section similar to a portion of Figure 6, but showing the parts adjusted for cylindrical work guiding.

Referring to these drawings, at 1 is indicated a traversing member for carrying a tool 2 and the work supports, which, as shown, comprise a pair of rolls 3 and 4. This traversing member is mounted on the lathe or other machine in place of or fixed to the usual traversing tool carriage so that it may be traversed axially of the work which is shown at 5. A cam bar as at 6 is employed to control the pattern of the taper to which the tool shall cut the work, this cam as shown being fixed to the machine frame as by means of the bolt 7 (see Figure 5) and extending is shown as perforated for the slidable recep tion of a threaded shank portion 15 of a cam follower bar 16 having a follower portion 17 engageable with the outer edge of the cam bar 6. This follower portion is held against the cam as by a leaspring170 having its upper end bearing aga-mst the end of the slide 11` adjacent tothe followerportmn, and

'having its lower end fixed to the member 10 as by the screw 171. rlhe opposite edge of ina-ybeclamped to the hub 21 -sothatiby turn- 4ing the sleeve 22the nut 19 willalsobe'turned. The sleeve 22 is provdedat its outer end with a handle portion v25. Adjacent to its inner ,end this sleeve 22 is provided with an outwardly extending pin 26 which may beengaged with a pin 27 projecting outwardly from the member 11. rlhis construction forms an adjustable connection betweenthe cani follower bar 16 and the tool slide 11 so that Ithe position of the tool 2 may be adjusted as desired and when once adjusted v.may vbe re-set withffexactness. rlhis may be done by loosening the sleeve-22 `from the nut, bringmg `the camy follower 17 Iup against the cam and `the tool carried by the tool slide .up tothe face of a standard piece of turned work and then screwing the nut 19 until it contacts with the tace ,of the tool slide 11. The sleeve 22 is then adjusted until the pin 26 makes contact with the pin 27 and is secured in position by the clamp bolt 2e to the nut. rvlhe nut then be lturned bac-hwardly to loosen the cam follower bar 16 wheneverdesired and .when zit is thereafter desired to set the tool tothe proper position, it is only necessary to Atightenthe nut .by turningethesleeve 22 `until the pin 26 y contacts with the pin 27. L.Onetace of the pin 2.6 may be cutaway in order that on the next .complete revolution of the nut in a direction to loosen the cani follower bar it l may clear :outer end .of the pin 27 so that it may he turned in the looseningdirection more than a single turn when desired.

' f The member 1 in its ,cover plate 8O is pro- Yidedwith a .slideway 30 .out of the plane of themainfp'ortion of Athe slide 11 but within 69 which; may ride a vertical slide 31 carrying on aqsuitable joulal 32 ,at its lower .end the worlrfengaging roll l. As shown 'best in Figures'9 and v11 this slide 31 hasa'wedge block 3d on rear lfacew-ithi-wh-iehmay be lengaged the inclined face 35 of awedgfe element 36. This wedge element 36 is'slidable in a horizontal slot 40 in the slide 11 and its outer end may be engaged by an adjusting abutment screw 41 threaded at its outer portion through a portion l2 of the slide 11. As the slide 11 is moved laterally to feed the tool toward the axis of the work, t-he inclined tace 35 of the .wedge element 36 acting on the Vwedge portion 34 of the slide 31, forces this slide downwardly so as to causea correspond ing` movement toward the worl; axis butin a 'direction substantially at right angles to -thatoi the tool toward the work axis. .The slide 31 is caused to be retracted when the .tool is retracted, which relieves the pressure of the wedge element 36 on the block 34e, as Lby means of a spring engaging atits lower end with a pin 51 fixed in an opening'52 in the slide member 31. YT he upper endof v,this spring engages a short bar 53, ltheendslof whiclrride in a counterbored portion 54 at the upper endot a sleeve 55 threaded'through acover plate 56 which is yfixed as `by means of acap screw 57 to the .upper edge ofthe inember 1. VrEhe sleeve may thusbe turned without twisting the spring..

A second ywork supporting slide carrying the work engaging roll `element 3 is mounted in the member v1, this beingshown at 60. This slide as shown is mounted horizontally substantially opposite to .the stool 2 .in a groove inthe portion 10. It is `normally urged a-way from ,the work axis as by meansotI lthe plunger .61 pressed youtwardly by :the lspring 62 ridingtherein and engaging at its inner end against the base 63 of a hole 6i within which the plunger 61 is slidable. 'The outer end ot this plunger engages a downturned portion 65 at theouter end of the slide 60. "This slide '.60 may be moved inwardly in accordance witn the position .of the tool 2 vand for this purpose it is shown as having f the lower. end portion 66 ot a lever `67 bearing thereagainst. This'lever is shown as iixed to an axially kadjustable, pivot shaft 70. In one axial position of this pivot shaft 7 O, as shown in Figures 2, 3, and Y6, the other arm 72 of the lever 67 bears with an extension 7 3 against the .headvot an abutment screw 74 threaded into the slide 11 on the opposite side of the axis ot the work 5k fromthe tool72. 'ilhus as the slide is moved to bring the tool toward the work ax`is,the lever is rocked to press the slide 60 in 4thelz'reyerse direction -toward'the work? axis, and as theslide 11 is moved outwardly the pressure of theQlower end of' thelever 67 is Vrelie-vedl so that the spring 62 may retract the slide 60 to a correspending extent. 4The slides 11 and'60 are retained in their respective slideways Vby means of the cover plate which has the slideway for the slide 31, and which may be secured to the outer face ofthe member 10 as by means of the screws 81. The rolls 3 and 4 be retained in position on their respective slides by means of this cover plate and as shown each one is carried by its pivot shaft in a suitable socket such as 85 in one face of its respective yslide without the necessity of any means for xing it in position. The outer edge portion of each of the rollers 3 and 4 is preferably rounded as at 86 to avoid any possibility of the work being marred thereby.

When rough work is to be turned taper the parts are adjusted as just described, the slides 31 and 60 being arranged to move with the tool toward and from the axis of the work with the tool. The tool used at this time is related to the work and the work-supporting elementas shown in Figure 7, having its cutting face at 90, and the work-supporting elements engaging' the work back of the line of cut on the work which has been turned by the tool 2, the operating traverse direction of the work being shown by the arrow A.

When it is desired to turn work tapered which has previously been turned cylindrical, the work-engaging elements may be held in fixed relation to the work axis, their connections to the tool to follow the taper being rendered inoperative. For this purpose the screw 41 is retracted, as shown in Figure 4, so that it will not engage the rear end of the wedge block 36 and the sleeve 55 is turned downwardly until its lower end engages the upper end of the slide 31, thus holding the slide against upward movement. The spring holds the upper end of this slide against the lower end of the sleeve which thus acts as a stop to limit its upward movement so that the roll 4 is held at the desired distance from the work axis to bear on the cylindrical portion thereof. The pivot shaft 70 is also adjusted from the position shown in Figures 3, 6 and 7 to the position shown in Figures 4 and 12, with a bearing portion 88 at the upper end of the lever 67 in axial alinement with an adjusting abutment screw 89 threaded into the member 1. This abutment screw 89 is adjusted so that the upper lever end bears thereon at the proper position so that the lower end of the lever presses the slide inwardly to hold the roll 3 at the desired distance from the work axis to bear on the cylindrical portion thereof. In this arrangement of the parts the tool 2a, as shown in Figure 8, has its cutting edge 91 substantially half way back from its forward edge so that it may cut back of the engagement of the work-supporting lrollers on the work, the direction of operative traverse of the turner being shown by the arrows B. Thus with this adjustment of the parts the work supporting rollers are held xed distances from the work axis and do not partake of the motion of the tool toward and from the axis of the work as determined by the contour of the cam bar 6. The pivot shaft 70 may be retained in either of its adjusted positions by means of a set screw 95 which may be engaged in either of a pair of annular grooves 96 and 97 in the pivot shaft, engagement of the set screw 95 in the groove 96 retaining the lever in position to hold the slide 60 in fixed position and engagement of the screw 95 in the groove 97 causing the lever to be held in position for the movement of the tool slide l1 to be effective in moving the work support slide 60.

Having thus described an embodiment of this invention it should be evident to those skilled in the art that various changes and modifications might be made therein without departing from its spirit or scope as defined by the appended claims.

I claim:

1. A taper turner comprising a work traversing member, a slide on said traversing member movable transversely to the direction of traverse of said member, a cam bar along which said member traverses for controlling the position of said slide, a tool carrier on said slide for holding a tool in operative relation to the work relative to the axis of which said member traverses, a work supporting device carried by said member and movable at an .angle to the direction of movement of said slide, a pair of cooperating wedge elements one of which is carried by said device, means for operatively connecting or disconnecting vthe other of said elements to said slide, whereby movement of said slide to bring the tool toward said work causes said elements to effect the corresponding movement of said device, a spring normally pressing said device away from said axis, and an adjustable stop for limiting the extent of such movement in response to said spring.

2. A taper turner comprising a work traversing member, a slide onv said traversing member movable transversely to the direction of traverse of said member, a cam bar along which said member traverses for controlling the position of said slide, a tool carrier on said slide for holding a tool inoperative relation to the work relative to the axis of which said member traverses, a work supporting device carried by said member and movable toward and from the axis of the work, a lever for transmitting motion of said slide to said device, and means for supporting said lever movable to bring said lever into and out of operative position.

3. A taper turner comprising a work traversing member, a slide on said traversing member movable transversely to the directior of traverse of said member, a cam bar along which said member traverses for controlling the position of said slide, a tool carrier on said slide for holding a tool in operative relation to the work relative to the axis of which said member traverses, a Work supporting device carried by said member and movable toward and from the axis of the work, a lever for transmitting motion of said slide to said de- CLT vice, means for supporting saidv lever VInovable to bring said lever into and out of operative position, and means forretaining said device in fixed position When said lever is out of operative position.

4. A taper turner comprising a Work traversing member, a Vslide on said vtraversing member movable transversely to the direction of traverse ofi said mem-ber, a Cani bar valong which said member traverses for controlling the position of said slide, a tool carrier on said slide for holding a tool in operative relation to the-Work relative to the axis of Which saidv member traverses, a Work supf porting device carried by said member and movable toward and from the axis of the Work, a lever for transmitting'motion of said slide to said device, a spring pressing said Vdevice away from the Work aXis and against one arm of said lever, means for supporting 'said lever for movement into and out of operative relation to said slide, and an adjustable stop vinto operative relation with Which said lever end may be engaged when said lever is moved out of operative relation to said slide to dene a position fory said device ,fixed With respect to said traversing member.

' In testimony whereof I have affixed my signature.

GEORGE A. PERRY.

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