US3252363A

US3252363A - Parallel guiding structure for templets on machine tools

Info

Publication number: US3252363A
Application number: US392153A
Authority: US
Inventors: Eugen A Matthias
Original assignee: Georg Fischer AG
Current assignee: Georg Fischer AG
Priority date: 1963-09-26
Filing date: 1964-08-26
Publication date: 1966-05-24
Anticipated expiration: 1983-05-24
Also published as: CH428375A; DE1934418U

Description

May 24, 1966 E. A. MATTHIAS PARALLEL GUIDING STRUCTURE FOR TEMPLETS ON MACHINE TOOLS Filed Aug. 26, 1964 Fig. I

5 Sheets-Sheet l 39 l I0 I! 12 I3 6 i 5 L -16 x I 27 I4 '17 l /5* l8 g2 20 I :3 V -2/ 1 r 40 I 0 -23 i 3 o. F 25 3] 9 25 INVENTOR A a 0e 4 Ma/ff/as BY 2 i May 24, 1966 E. A. MATTHIAS 3,252,363

PARALLEL GUIDING STRUCTURE FOR TEMPLETS ON MACHINE TOOLS Filed Aug. 26, 1964 5 Sheets-Sheet 2 May 24, 1966 E. A. MATTHIAS 3,252,363

PARALLEL GUIDING STRUCTURE FOR TEMPLETS ON MACHINE TOOLS Filed Aug. 26, 1964- 5 Sheets-Sheet 5 Fig.3

INVENTOR A-"ye n /7- /Va//} z'ar United States Patent 3,252,363 PARALLEL GUIDING STRUCTURE FOR TEMPLETS 0N MACHINE TOOLS Eugen A. Matthias, Schatl'hausen, Switzerland, assignor to Gieorg Fischer Aktiengesellschaft, Schaifhausen, Switzer an Filed Aug. 26, 1964, Ser. No. 392,153 Claims priority, application Switzerland, Sept. 26, 1963,

11,889/ 63 Claims. (CI. 82-14) The present invention relates to a device for parallelly guiding a templet holder on a chip-removing machine tool with copying device, in which the templet holder is arranged on lateral supporting members of a support which is tiltably journalled for adjusting the copy templet.

A tilting device for a copy templet has become known according to which the templets are arranged in a support which is tiltable about pivots mounted on the machine. The said support carries adjusting means for adjusting the templet to the desired work piece diameter. If, with such an arrangement, for purposes of adjusting the tool, large adjusting strokes, i.e. adjusting angles are necessary, the angle of inclination of the templet contour to be scanned changes with regard to the contact surface of the feeler, which may result in copying errors.

In extreme instances, the deviation brought about by the required correction may be so great that the control edge of the copy templet will be located outside the contact range of the feeler.

It is, therefore, an object of the present invention to provide a device for parallelly guiding a templet holder on chip-removing machine tools with copying device, which will overcome the above-mentioned drawbacks. 1

It is another object of this invention to provide a device as set forth in the preceding paragraph, in which the copy templet may be adjusted to a relatively large extent without the necessity of changing the angular position of said copy templet.

It is a further object of this invention to provide a tiltable templet holder which may be adjusted to two or more positions.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, inwhich:

FIGURE 1 diagrammatically illustrates an elevation partly in section through a copy lathe equipped with a copy templet holder according to the present invention;

FIGURE 2 is a perspective view of a portion of the arrangement of FIGURE 1 and, more specifically, the upper right-hand portion of FIGURE 1;

FIGURE 3 is a diagrammatic illustration partially in section of another embodiment of the present invention provided with a tiltable templet holder.

The device according to the present-invention is characterized primarily in that the parallel guiding arrangement comprises two pivot points on elements of the machine, on which pivot points two arms are tiltably journalled. These arms have one of their ends provided with a movable pivot while the same movable pivots are interconnected by a further arm which, in its turn and more specifically at one end thereof, carries a rigidly arranged templet holder. The invention is furthermore characterized in that one of the arms journalled on pivots of the machine is rigidly connected with a support carrying a fixed pivot associated with a respective arm, the said support representing an adjusting lever which is adapted to be affected by an adjusting screw.

Referring now to the drawing in detail, the copying lathe illustrated therein with a hydraulic copying device as, for instance, described in U.S. Patent No. 2,645,084,

has mounted therein a workpiece 2 rotatable on a Work means 39. The arrangement according to the invention furthermore comprises a base 8 to which is connected the machine bed 7 and two lateral walls 9 (only one of said lateral walls being visible in FIG. 1viz. the righthand one). Also visible from the drawing are parts of a hydraulic copying control including a copy templet holder 21 having connected thereto a copy templet 23, a feeler lever 25 rotatably journalled on pivot 26 on copy carriage 5, said feeler lever 25 carrying a feeler 24. When copy turning, said feeler 24 slides along copy templet 23. A control member such as a valve 29 which is displaceable relative to a stationary control edge 28 4 of the copy turning device is, through a rod 30 and a connection 31, connected to the feeler lever 25. The arrangement also comprises a pressure spring 27 acting upon control member 29. The copy carriage 5 moves along guide means 39.

The templet holder 21 is by means of pivots 20 rotatably suspended on two arms 22 (one only being visible). Said two arms 22 form a part of a support 18 which is turnable about a pivot 19 on said side walls 9. Templet holder 21 is rigidly connected to a lever arm 17 which in its turn, by means of a pivot 13, is pivotally connected to an arm 12 rotatably journalled on a pivot 11 in a U-shaped support 10. U-shaped support 10 is rigidly connected to side wall 9 and comprises an adjusting screw 16 and a pressure spring 14, which are adapted to act upon an adjusting lever arm 15 rigidly connected to support 18. FIG. 2 shows in perspective, the location of the various elements described above in connection with FIG. 1.

Operation of the embodiment of FIGS, 1 and 2 In the parallelogram-like four-joint train which serves for parallelly guiding the templet holder 21 and consists primarily of

elements

12 and 17 and arm 22, each two 7 of the respective oppositely located members of the four-joint train have the same length. Since the two

joint pivots

11 and 19, which are located above each other, are anchored to the side plate 9, the first member of the four-joint train is formed by the side plate 9 itself, whereas arm 22 rigidly connected to support 18 represents a further member. the pivot 11 and in view of the pivot 13 connection will continuously during tilting movements of support 18 hold member 17 parallel to the connecting line of

pivots

11 and 19. As a result thereof, the copy templet 23 may be adjusted to any customary extent without a change in its angular position. This adjustment is effected by means of adjusting screw 16 acting upon adjusting lever arm 15 which is under the effect of a pressure spring 14, and also through the intervention of support 18.

Embodiment of FIG. 3

The embodiment of FIG. 3 represents a further development of the device illustrated in FIGS. 1 and 2. The pivot 11 of FIG. 1 has its equivalent in the pivot 11a of FIG. 3 but in contrast to the arrangement of FIGS.

Member 12 turns about 3 of FIG. 1 has been replaced by a titable templet holder 38 having connected thereto two copy templets 23a and 23b. Adjusting screw 16 and pressure spring 14 which act upon adjusting lever arm 15 which is rigidly connected to support 18 and arm 22 are held in two arms 36 and 37 on side plate 9. The adjusting device pro vides for two predetermined axially shifted positions of rod 33.

The function of this device consists in that templet holder 38 is guided parallelly not only in the manner described in connnection with FIGS. 1 and 2 but its tiltable adjustment is effected by a suitable displacement of the pivot 11a by means of said four-joint train. In the position illustrated in the drawing, copy templet 23a can be scanned by the copy system. Copy templet 23b is in tended for a second machining operation. To this end, the adjusting device 35, which is adapted to be actuated mechanically, hydraulically, pneumatically or electrically,

displaces pivot 11a to position 11b whereby the pivot 13a moves to position 13b. As a result thereof, tiltable templet holder 38 is so adjusted that the copy templet 2312 may be scanned by feeler 24. It will be obvious for geometrical reasons that this tiltable adjustment will function also when arm 22 and thereby link 12 are not horizontal. When displacing the pivot 11a to position 11b, link 12 does not move in its longitudinal direction but parallel to itself.

It is, of course, to be understood that the present invention is, by no means, limited to the particular construction shown in the drawing but also comprises any modifications within the scope of the appended claims.

What is claimed is:

1. In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide and a copy slide moveable on the base and templet to control said templet operated means, a parallelogram linkage on said base comprising pivotally interconnected arms, said templet holder being fixed to one of said arms, and means for adjusting the angularity of said arms relative to each other.

2. In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide on the base; a templet holder for receiving a templet to control said templet operated means, a linkage comprising pairs of parallel pivotally interconnected arms forming parallelogram means, one of said arms comprising a portion of said base whereby a second of said arms opposite thereto takes a motion parallel to a fixed reference plane, said templet holder being fixed to said second. arm and being adapted to support a templet having its effective-contour in a plane parallel to said fixed plane, and means for adjusting said arms to predetermined positions of angularity relative to each other.

3. In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide on the base; a templet holder for receiving a templet to control said templet operated means, spaced first pivot means on said base, parallel first arm means pivoted at one end to respective ones of said first pivot means, second pivot means in the other end of said first arm means and disposed on a line parallel to a line passing through said first pivot means, second arm means connected to said second pivot means, said templet holder being connected to said second arm means, and means between said base and one of said first arm means for adjusting said one of said first arm means angnlarly thereby to effect movement of said templet holder in parallelism with itself in an are about one of said first pivot means.

4. In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide on the base; a templete holder for receiving a templet to control said templet operated means, spaced first pivot means on said base, parallel first arm means pivoted at one end to respective Ones of said first pivot means, second pivot means in the other end of said first arm means and disposed on a line parallel to a line passing through said first pivot means, second arm means connected to said second pivot means, said templet holder being connected to said second arm means, a lever fixed to one of said first arm means, a screw on the base abutting said lever so that adjustment of the screw will adjust said one of said first arm means angularly thereby to effect movement of said templet holder in parallelism with itself in an are about one of said first pivot means.

5. In a templet controlled machine tool according to claim 4- in which said screw forms an abutment for said lever when the linkage moves to move the templet holder in a direction toward the contoured edge of a templet therein, and a spring bearing on the lever and biasing it toward said screw.

6. In a templet controlled machine tool according to claim 3 in which said templet holder is adapted to receive a templet having a contoured control edge formed in a plane parallel to the said lines passing through said first and second pivot means.

7. In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide on the base; a templet holder for receiving a templet to control said templet operated means, spaced first pivot means on said base, parallel first arm means pivoted at one end to respective ones of said first pivot means, second 'pivotmeans in the other end of said first arm means and disposed on a line parallel to a line passing through said first pivot means, second arm means connected to said second pivot means, said templet holder being connected to said second arm means, and means between said base and one of said first arm means for adjusting said one of said first arm means angularly thereby to effect movement of said templet holder in parallelism with itself in an are about one of said first pivot means, said templet holder having means for supporting at least two templets in parallel spaced relation, and means for tilting said templet holder to present the control edges of respective ones of said templets to a templet follower.

8. In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide on the base; a templet holder for receiving a templet to control said templet operated means, spaced first pivot means on said 'base, parallel first arm means pivoted at one end to respective ones of said first pivot means, second pivot means in the other end of said first arm means and disposed on a line parallel to a line passing through said first pivot means, second arm means connected to said second pivot means, said templet holder being connected to said second arm means, and means between said base and one of said first arm means for adjusting said one of said first arm means angularly thereby to eifect movement of said templet holder in parallelism with itself in an are about one of said first pivot means, said templet holder having means for supporting at least two templets in parallel spaced relation, and means for adjusting one of said first arm means in the direction of its'length thereby to 'tilt said second arm means to tilt said templet holder to present the control edges of respective ones of said templets to a templet follower.

9, In a templet controlled machine tool having a base and a copy slide moveable on the base and templet operated means controlling the movement of the slide on the base; an elongated first :bar forming a templet holder,

an elongated second bar in spaced parallel relation to said first bar and pivoted to said base, first arms fixed to said second bar and extending to and pivoted to said first bar, second arms fixed to said first bar and extending therefrom at an angle to said first arms, third pivoted to said second arms at points remote from said first bar and extending parallel to said first arms, means pivotally connecting said third arms to said base, the pivotal connections of said second bar and third arms with said base lying in a plane parallel with a plane containing the pivots pertaining to said second arms, a lever fixed to said second bar, a spring between the base and lever urging the lever in one direction, and means screw threadedly connected to the base and forming an adjustable abutment for said lever.

10. In a templet controlled machine tool according to claim 9 in which said means pivotally connecting said third arms to said base includes means for adjusting the pivotal connection of said third arms to said base to cause tilting of said second arms and first bar withoutchanging the condition of parallelism of said first and' third arms.

No references cited.

WILLIAM W. DYER, IR., Primary Examiner.

G. A. DOST, Assistant Examiner.

Claims

1. IN A TEMPLET CONTROLLED MACHINE TOOL HAVING A BASE AND A COPY SLIDE MOVEABLE ON THE BASE AND TEMPLET OPERATED MEANS CONTROLLING THE MOVEMENT OF THE SLIDE AND A COPY SLIDE MOVEABLE ON THE BASE AND TEMPLET TO CONTROL SAID TEMPLET OPERATED MEANS, A PARALLELOGRAM LINKAGE ON SAID BASE COMPRISING PIVOTALLY INTERCONNECTED ARMS,