US2346297A

US2346297A - Pressure actuated tool

Info

Publication number: US2346297A
Application number: US461493A
Authority: US
Inventors: Rudolph H Garbe
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1942-10-09
Filing date: 1942-10-09
Publication date: 1944-04-11
Anticipated expiration: 1961-04-11

Description

April 11, 1944.

R. H. GARBE PRESSURE ACTUATED TOOL Filed Oct. 9, 1942 7af I 7gg 72 i L 73 70- 7 68 6j 66 6 La o 59 6 35 .56 5.5 54 53 l 55 57 .se l l 33 El? 38 8/" 39 i m I 45 Q G: 48 E er E t @I t /A E 47 n 50` e: E @I m @I E Si 30 49 G: I t @2 5/ y as J2 /A/VfA/To/' f j E. H; GARE k j l j Patented Apr. 1 1, 194e PRESSURE ACTUATED TOOL Rudolph H. Garbe, Forest Park, lll., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application October 9, 1942,' Serial No. 461,493

11 Claims.

This invention relates to pressure actuated tools and more particularly to a punch press actuated thread tapping apparatus.

It is an object of the present invention to provide a simple and inexpensive apparatus for operating rotary tools.

In accordance with one embodiment of the invention, tapping tools are driven by the ram of a punch press to tap holes in an article while other tools in the press are performing other operations. A large piston driven by the press applies pressure to drive a smaller piston for actuating a tap driving member through a greater distance than the stroke of the ram.

A better understanding of the invention may be had by reference to the detailed description when considered in conjunction with the accompanying drawing, wherein the single gure shows, in section, the ram of a punch press and the mechanisms driven thereby for driving tapping tools and comprises an illustration of one embodiment of the present invention.

In the drawing, the ram of a punch press I has formed intgerally with it a punch supporting plate 2, in which punches 3 and 4 may be suitably fixed for cooperation with a die block 5 mounted upon an interposer plate 6, which, in turn, rests upon a bed 1 of the punch press. The punch supporting plate 2 carries other tools in addition to the punches 3 and 4, which are not of interest in connection with the present invention and which are, therefore, not shown, but it will -be understood that the punch press is of the type using the usual progressive tools whereby a series of operations may be performed on a strip of material in any suitable manner and that the material 8 may be fed through the apparatus by any7 suitable means (not shown). It will be further understood that the punches 3 and 4 are simply to urge the plate I3 downwardly against the strip of material 8.

Threaded into the punch supporting plate 2, and adjustably located in position therein by a lock nut 22, is a piston actuating rod 23, which extends through the bed 1 of the press and abuts at its lower end a piston 24. The piston 24 is movable within a. cylinder 26, in which there is contained a supply of oil or other suitable uid which will be forced through a port 21 in the cylinder into a pipe 28 when the piston actuating rod 23 is moved downwardly by the punch supporting plate 2 of the punch press. The Iluid forced downwardly through the pipe 28 will be carried through suitable piping 29 and through a port 30 into a cylinder 3|, which is of an appreciably smaller diameter than the cylinder 26 and which is correspondingly appreciably deeper than the cylinder 26, whereby when the uid under pressure is displaced from the cylinder 26 by the downward movement of the piston 24, a piston 32 in the cylinder 3| will be driven upwardly a much greater distance than the piston 24 is driven downwardly.

The cylinder 26 is connected directly to the underside of the bed 1 of the punch press, whereas the cylinder 3l is mounted upon a plate 33 positioned beneath the bed 1 and attached to the lbed by means of

support rods

34 and 35. The

support rods

34 and 35 are reduced at their ends and are threaded into the bed 1 of the press and also have shoulders 36 and 31 against which the plate 33 is held by

nuts

38 and 39 threaded onto the reduced ends of the

rods

34 and 35. Thus, the plate 33 is rigidly secured in position beneath the bed 1 of the press.

The piston 32 has xed to it a piston rod 46 having a slidable plate 46 attached to its upper end for recipocation with the piston rod under the influence of the piston 32. The plate 46 is vnormally urged downwardly by compression springs 41 and 43 surrounding rods 49 and 50,

side walls of which holes are to be threaded by I taps II and I2, respectively.

In the preferred embodiment of the invention,

a stripper plate I3 is attached to the punch supporting plate 2 by means of pins I4 and I5 threaded into the stripper plate I3 and having heads which are threaded into the plate 46 and are provided with retaining nuts 5I and 52 at their lower endsY between which retaining nuts and the under side of the plate 33 the springs 41 and 48 are compressed. Thus, the springs 41 and 48 will tend to drive the rods 49 and 50 downwardly to draw the plate 46 downwardly with them.

Set into the plate 46 are a pair of threaded bushings 53 and 54, which may be secured in the plate 46 in any suitable manner and which engage the threads of a pair of

spindles

55 and 56 to impart rotary motion to the spindlesv 55 and 56 as the plate 46 is reciprocated vertically. The

spindles IU and 53 bear in thrust bearings i1 and Il formed in the plate 33 and in bearings 53 and li formed in a bearing plate 63, which is held on the underside of the bed 1 of the press by shoulders 6I and I2 at the end of the reduced portions of the supporting

rods

34 and 35. The spindles l and 56 extend upwardly through the bed 1 of the press and are provided at their upper end with sockets S5 and 66, respectively, which are rectangular in cross section and are adapted to receive the Shanks 61 and 68 of tap holders 69 and 10, respectively, in which the taps I2 and II are ilxed by means of set screws 1I and 12, the lower ends of the taps being cut away, as shown, for example, at 13, to lock against rotation in the tap holders 69 and 10.

Set into the die block 5 is a guide plate 14, which serves to guide the taps I I and I2 into the holes 3 and I0 punched in the strip of material 8, so that as the taps II and I2 are advanced toward the strip of material 3, there will be no tendency for them to improperly engage with the holes 9 and I0. The stripper plate I3 is also provided with

apertures

15 and 16 coaxial with the taps II and I2, respectively, so that the taps may freely pass through the stripper plate I3. The tap holders 69 and 10 have external threads formed thereon of the same pitch as the threads on the taps I2 and II, respectively, for engaging internal threads formed in

apertures

11 and 18 formed in the die block 5 so that as the taps rotate with the spindles 55 and 53, the rate of advance of the taps will be controlled by the cooperating threads on the tap holders 69 and 1l and in the

apertures

11 and 18, respectively, whereby, although the spindles do not reciprocate, the taps will advance with the tap holders 63 and 10 and carry the square shanks 61 and S8 of the tap holders 83 and 10 upwardly at the same rate that the thread is to be cut in the holes 9 and I 0.

In the operation of the apparatus, two holes 9 and I0 will be tapped simultaneously for each stroke of the punch press ram I and the travel of the plate 46 will be greater than the travel of the ram I, whereby the desired amount o! rotation may be imparted to the

spindles

55 and 56, although the stroke of the punch press is relativeb' small due to the fact that the large amount of fluid displaced by the piston 24 in its short travel downwardly will impart a relatively great amount of travel to the smaller piston 32. Ii it is desired to change the amount of rotation of the taps I I and I2, the position of the rod 23 may be adjusted with respect to the plate 2 so that the rod 23 will strike and actuate the piston 24 either earlier or later in the stroke of the ram I and impart more or less travel to the piston.

What is claimed is:

l. A press-operated article-forming apparatus comprising a rotatable tool, a spindle for imparting rotation to said tool, means reciprocable with respect to the spindle for rotating it, a piston for driving said reciprocable means, a second piston larger in diameter than the first mentioned piston, connecting means for conning a supply of fluid between said pistons, and a press driven ram for actuating the second piston.

2. The combination of a positively driven ram with a rotary tool to be driven thereby comprising a piston of relatively large diameter driven by said ram, a second piston of relatively small size with respect to the first mentioned piston and having a longer stroke than the rst-mentioned piston, connecting means for coniining a supply of fluid between the first-mentioned piston and the second-mentioned piston whereby movement imparted to one piston will be transmitted to the other piston, means driven by said second piston, a spindle rotatable by said means and driven by the second piston, and means interconnecting said spindle and the rotary tool.

3. In a punch press actuated apparatus, a rotary tool, a press actuated ram, a piston driven by said ram, a second piston, connecting means for confining a supply of fluid between the firstmentioned piston and the second-mentioned piston whereby movement will be imparted to one piston when the other piston is moved, and means actuated by the second piston for rotating the tool.

4. In a punch press actuated apparatus, a rotary tool, a press actuated ram, a piston driven by said ram, a second piston having a smaller diameter and longer stroke than the rst mentioned piston, connecting means for conning a supply of fluid between the pistons whereby motion imparted to one piston will be transmitted to the other piston and means actuated by the second piston for rotating the tool.

5. In a punch press actuated apparatus, a rotary tool, a press actuated ram, a piston driven by said ram, a second piston, connecting means for conning a supply of uid between said pistons. a threaded plate carried by said second pisP ton, and a spindle threadedly engaging the threads in the plate for rotation thereby and carrying said rotary tool.

6. In a punch press actuated apparatus, a rotary tool, a press actuated ram, a piston driven by said ram, a second piston, connecting means for confining a supply of iluid between s aid pistons, a plate carried by said second piston for reciprocation thereby, means for urging said plate in a predetermined direction, a kspindle threaded in said plate for rotation by said plate upon reciprocation of the plate, means for holding the spindle against longitudinal movement, and a tool carrier rotatable with and slidable longitudinally of the spindle for driving the rotary tool.

7. In a punch press actuated apparatus, a rotary tool, a press actuated ram, a piston driven by said ram, a second piston, connecting means for confining a supply of fluid between said pistons, a plate carried by said second piston for reciprocation thereby, means for urging said plate in a predetermined direction, a spindle threaded in said plate for rotation by said plate upon reciprocation of the plate, means for holding the spindle against longitudinal movement, a tool carrier rotatable with and slidable longitudinally of the spindle for driving the rotary tool, and a xed plate threadedly engaging the tool carrier to determine its rate of longitudinal movement.

8. In a punch press actuated apparatus, a rotary tool, a press actuated ram, a piston driven by said ram, a second piston, connecting means for conm'ng a supply of uid between said pistons, a plate carried by said second piston for reciprocation thereby, a spindle threaded in said plate for rotation by said plate upon reciprocation of the plate, bearings for holding the spindle against longitudinal movement and permitting rotation thereof, and a tool carrier rotatable with and slidable longitudinally of the spindle for driving the rotary tool.

q, In a punch press actuated apparatus, a rotary tool, a Jpress actuated ram, a piston driven by said ram, a second piston, connecting means for confining a supply of fluid between said pistous. a plate carried by said second piston for reciprocation thereby, means for urging said plate in a predetermined direction, a spindle threaded in said plate for rotation by said plate upon reciprocation of the plate, means for holding the spindle against longitudinal movement, a tool carrier rotatable with and slidable longitudinally of the spindle for driving the rotary tool, and means for determining the rate of advance of the tool.

10. A punch press actuated apparatus comprising a reciprocating ram having a predetermined length of stroke, a rotary tool, and means interconnecting the ram and tool for rotating the tool including a reciprocal member for rotating 15 the tool and means actuated by the ram for reciprocating the reciprocal member a greater dis- RUDOLPH H. GARBE.