US1118342A - Metal-working machine. - Google Patents

Description

B. M. W. HANSON.

METAL WORKING MACHINE.

APPLICATION FILED FEB.4,1914.

1,118,342,, Patented Nov. 24, 1914,

2 SHEETSSHEET 1. F797. 2.

B. M. W. HANSON.

METAL WORKING MACHINE.

APPLICATION FILED 1mm. 1914.

1 1 1 8, 342 Patented Nov. 24, 1914.

2 SHEETS -SHEET 2.

Wtnesses': Irv/aerator:

unrrnn srnrusrn rnnrr ouruen BENGT M. W. HANSON, OF HARTFORD. CONNECTICUT. ASSIGNOR TO PRATT & WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF NEW JERSEY.

METAL-WORKING MACHINE.

Application filed February 4, 1914.

b all whom it may concern:

Be it known that I, BENGT M. W. HAN- son, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in MetallVorking Machines, of which the following is a specification.

This invention relates to metal working machines.

A metal working machine involving the inventionvcan be employed with advantage in various connections. As shown in the accompanying drawings forming part of the present specification, it is organized for shaping and hence the machine thus illustrated constitutes what shaper. As will be inferred the invention is not limited in this particular.

The invention involves several features of novelty and advantage, one the provision of means by which the angular relation of a moving tool with respect to the work can be varied, which is of advantage in cutting the work along angles such as the formation of reliefs on articles of various kinds.

' Another equally important feature is the provision of means by which rotary adjust ment of the tool or its head can be secured which is of utility in making cuts on different faces of work, in that 1n this respect the tool can be adjusted with regard to the work without changing any other adjustment in such manner as to first cut on one face of the work and then on another face whether these faces be at right angles to each other or in any other disposition.

The invention comprises other features of novelty an d advantage which with the foregoing will be stated at length in the following description wherein will be set forth in detail that one of the several forms of embodiment of the invention which have been selected for illustration in the drawings. From this it will be clear that the inveir tion is not limited to the showing thus made; there may be radical departures there from within the scope of the invention dcfincd by the claims following said description.

Referring to said drawings: Figure l is a side elevation of a metal working machine ii'ivolving the invention. Fig. 2 is a horizontal section on the line Q-2 of Fig. 1,

Specification of Letters Patent.

is known as a- Patented Nov. 24, 1914.

Serial No. 816,437.

and, Fig. 3 is a vertical section of the line 33 of Fig. 2.

Like characters refer to throughout the several figures.

The different parts of the machine may be -supportcd upon any suitable framework. When the improvements are incorporated in a shaper the framing at present in use in such a machine may be followed. This framing involves a base or bed and a column rising therefrom. The base or bed of the machine is not shown, but the column is. being denoted in a general way by 2 and being wholly and in this respect like that shown in Letters Patent No. 1,084,544 of January 13, 1914.

The machine constituting the subject matter of the present case whether it be used as a shaper or in some other manner comprises a carrier for a suitable tool, and this carrier has a compound movement, one of which is utilized in making a cut and the other to effect variations in angular presentation of the tool to the work. A carrier such as meets the necessary conditions may consist of a slide as 3. The angular adjustment of the slide 3, if a tool carrier of this character is provided, may be secured in several different ways, for instance by mounting the tool carrier or slide 3 on a swinging support as 4:, the support 4t as illustrated being sustained by a horizontal pivot as 5 supported near the upper side of the overhanging portion of the column or upright 2 and having ways to support the tool slide 3. By swinging the support at the angular position of the tool (hereinafter described) on the slide 3 may be varied. As shown the support 4 is mounted for movement about a horizontal axis, but although this is advantageous, it is not necessarily material nor is it required that in all cases the slide 3 be carried on the support. As a matter of fact there may be instances where a slide is not necessary, the essential thing being to have a tool carrier which has a back and forth movement, so that the tool can make a cut and then return and to also secure the angular adjustment of the tool carrier with respect to the tool to obtain an angular cut.

The angular adjustment of the support 4 may be secured in any desirable manner,

for instance by the bolts 5' extending like parts through arcuate slots 6 on the opposite side walls of the support 4 and which bolts pass through perforations in the opposite walls 7 of the overhanging portion of the column 2, the bolts being equipped with nuts 8 on the outer side faces of said column. The slots 6 are located at what is shown as being the lower part of the support 4 and are struck from the center of oscillation of said support. By loosening the nuts of the bolts the support 4 can be adjusted about its center of motion and when the necessary adjustment is obtained said nuts will be set up to maintain the adjustment. In the present case the slide 3 is power operated, and this result can be obtained in any desirable manner for instance through the agency of the rock lever 9 pivoted as at 10 in the column 2, the forward branch of the lever extending,

through registering slots in the front of the column 2 and in the rear of the adjustable support 4. Between the front end of the lever 9 and the block 11 hereinafter more particularly described is a link 12 pivoted to the respective parts. It might be noted at this time that the block 11 is rigidly yet adjustably connected with the slide 3 for a purpose that will be hereinafter explained, so that normally when the lever 9 is rocked or oscillated the slide 3 will through the intermediate parts be reciprocated to cause the tool hereinafter described to first cut through the work and to then return.

Any suitable means may be provided for oscillating or rocking the lever 9. The means shown for this purpose will now be described. Within the hollow column 2 supported by suitable bearings therein is the rotary shaft 13 provided with a crank 14 furnished with a pin 15 near its free end to pivotally receive the block 16 disposed within the longitudinal slot 17 of the long arm of the lever 9 which is usually made counterbalanced as in the patent set forth. Fastened to the shaft 13 is the spur gear 18 in mesh with the pinion 19 carried by the shaft 20 supported by the column 2 and furnished with a suitable driver as the cone pulley 21. It will, therefore, be evident that on the r0- tation of this cone pulley 21, the lever 9 through the intermediate described parts will be rocked to effect through the elements already described the reciprocation of the slide 3 on the angularly adjustable support 4. The purpose of the adjustable block or its equivalent is to govern the time at which the tool should start its work. Normally the block 11 is clamped to theslide 3 for example by the clamping part 22, the hub and cam portion of which is threaded onto the stud 23 projecting forwardly from the block 11. By loosening the clamping part 22 or analogous member the block 11. can be adjusted on the slide to secure the function set forth. Any desirable means may be provided for thus adjusting the block, although those shown and now to be described have been found satisfactory. The slide 3 has a bearing 24 at its upper end for rotatively supporting the shaft 25 which as in the patent already mentioned is longitudinally immovable. This shaft 25 which is made in the form of a screw is tapped through a bore in the block 11. Fastened to the upper end of the screw shaft 25 is the spur gear 26 in mesh with the companion spur gear 27 on the shaft 28 supported by the bearing 24 and equipped with a hand wheel or similar device 29 by which the shaft 28 and therefore the screw shaft 25 through the intermediate gears 27 and 26 can be rotated to thereby adjust the block 11 provided the clamping member 22 be in its releasing position. When the adjustment of the block is obtained the clamping member 22 will be set. The tool will be of a character adapted to the particular work; that shown is denoted by 30 and is supported by the head 31 which consists of several sections, as will be hereinafter I more particularly described. This head 31 is mounted for rotary movement, turning in the construction shown about an axis extending in the direction of the path of movement of the slide 3 which is up and down in the present case. In the organization illustrated this head moves through a complete circle, although there may be instances where this is not always so. There is an advantage, however, in the construction represented, in that the head 31 can be adjusted to permit the tool 30 to cut on all four sides of a square object, or so that the head can be adjusted to enable the tool to cut any portion of the circumference of a cylindrical object. To thus swivelly mount the tool head 31 any desirable means may be provided, the pivot 32 being shown for this purpose, the cylindrical shank of the plvot extending through a bore 33 in the lower end of the slide 3 and the head 34: of said pivot being situated in a chamber 35 of said tool head 31, the roof or top of the chamber having a counterbore to receive the "pivot head 34. Supported for rocking movement by the slide 3 near the lower end thereof is the pin 36 constituting a convenient clamping member and extending through a transverse perforation37 in the shank of the pivot 32, said pin 36 having in said perforation a cam portion 38 which acts against the wall of the perforation 37 to elevate the pivot 34 and therefore cause said p vot to draw'the head 31 solidly against the slide 3 when the pin or shaft 36 is turned 1n one direction. By oppositely turning the pin 36 the head 31 will be unclamped fromthe slide 3, so that it can be rotated the requis te extent. and when thus adjusted the pin or shaft 36 will be manipulated to rigidly secure said tool head in its ad usted position.

To facilitate rocking motion of the clamping member or pin 36 the same may be equipped with a handle 39.

The tool head 31 comprises a main or relatively stationary section 40 and an auxiliary or swinging section 41, the main member 40 being directly clamped to the slide 3 while the auxiliary section 41 directly carries the tool and is pivoted as at 41' to said main section 40. The shank of the tool extends thr ough a slot 42 in the enlarged part of the tool post 43 which enlarged part has a sliding movement in the chamber 44 in said swinging section 41. The enlarged part of the tool post 43 projects forwardly from the open front side of the chamber 44, while the reduced part 45 of said tool post extends rearwardly through a perforation in the back part of the swinging section 41; the perforation in question opens into the chamber 44. The rear end of the reduced portion 45 is equipped with a nut 46. It will be noticed that the width of the slot 42 is greater than the width of the shank of the tool 30 so as to provide for the clamping and unclamping of the tool 30 through the turning of the nut 46. When said nut 46 is turned to the right (if it have a right thread) the tool post 43 will be drawn backward so as to draw the shank of the tool 30 into solid engagement with the swinging section 41 or against the hard metal facings 47 thereon which can be pinned or otherwisesuitably fastened in place. Opposite movement of the nut 46 effects the forward movement of the tool post 43 and the consequent freeing of the tool 30, so that it can be dismounted and a substitute if necessary, put in its place. It will be noted that the forward end of the tool post 43 or its equivalent is back of the cutting edge or point of the tool 30 and therefore back of the cutting plane, by virtue of which the tool can cut entirely through the work without interference no matter what the depth or thickness of the out be within certain limitations. In making a maximum cut with a shaping or analogous tool, how ever, the tool securing means of whatever character the same may be do not come in contact with the work.

- In a shaper the cut usually occurs on the advance of the tool carrying slide and during the cutting operation by a tool as 30, the thrust against the 'tool is in the opposite direction and this effect is transferred to the swinging section 41 and in turn is transferred to the relatively fixed section 40, the two sections having engaging flat surfaces 48 and 49 respectively which engage during the cut so that at this time the effect is as though the swinging section 41 were rigid or integral with the body or main section 40. It will be perceived that the engaging thrust faces 48 and 49 have their contact approximately diagonally opposite the center of movement of the swinging or auxiliary section 41. During retractive movement of the parts the swinging member 41 permits the cutting portion of the tool 30 to travel lightly in contact with the work without cutting and if any obstruction is encountered during this particular motion the swinging member can of course, move away from the work, and in view of this condition the work will not be marred or otherwise injured. In the organization shown the swinging section 41 is adapted to yieldingly receive thrusts on the retractive movement of the slide 3 or similar member, and for this purpose any desirable means may be provided the spring 50 being shown for the purpose. Said spring is of coiled type and encircles the pin 52 disposed in the chamber 35 and rigidly connected with the body or main section 40. One end of said spring bears against said body or main section and the other bears against a lug or ear as 53 rising from the back upper portion of the swinging section 41. Should the tool on the backward or upward movement of the slide 3 strike any obstruction, the shock is taken up by the spring. There may be cases where it is desirable to prevent swinging movement of the section 41 on the retractive movement'of a shaping tool. such for instance as when a very long tool is being used and the screw 54 answers satisfactorily in this connection. Asshown said screw 54 is tapped through the In 53. Normally its inner end is SGPlifitGt from the pin 52. It may be operated, however, so that said inner end will engage the adjacent terminal of the relatively fixed pin and in such an event the section 41 will be held against movement with respect to the companion section 40. It will be noticed that the tool post 43 is situated between the axis of oscillation of the swinging member 41 and the hearing or abutment faces 48 and 49 so as to obtain the maximum holding efficiency of said swinging section 41 by the relatively rigid section 40 during cutting.

\Vhat I claim is:

1. A machine of the class described comprising a swinging support. means for holding said support in an adjusted position, a tool carrying slide on said support. and means extending through the support and operatively connected with the slide for reciprocating the latter.

2. A machine of the class described comprising a swinging support. means for holding said support in an adjusted position, a tool carrying slide on said support, and means extending through the support, and adjustably connected with the slide for reciprocating the latter.

3. A machine of the class described comprising a swinging support, means for holding said support in an adjusted position, a tool carrying slide on said support, and an oscillatory power operated member extending through the support and operatively connected with the slide for reciproeating the same.

4:. A machine of the class described com prising a tool carrying slide, a support on which the slide is mounted for reciprocation, means sustaining the support for swinging movement, means for holding the support in an adjusted position, and means acting against the slide between the points which the support is sustained and adjustably'" held, for reciprocating said slide.

5. A machine of the class described comprising a swinging support, a tool carrying slide mounted for reciprocation on said support, a block on the support adjustably connected with said slide, and means connected with said block for operating the slide.

6. A machine of the class described comprising a swinging support, a tool carrying slide on the support, a lever sustained inde pendently of the support, extending intov 1,11 i eas projecting through the same and operatively connected with the slide for reciprocating the latter.

8. A machine of the class described comlinkbetween the oscillatory member and the slide for securing the reciprocation of said slide.

9. A machine of the class described com prising a tool-supporting head provided with a' bearing surface and also with a swinging member which engages said bear ing surface during cutting, said swinging member having means for directly carrying a tool, situated between the axis of movement of the swinging member and said bearing surface, a pin carried by the body of said head, a spring surrounding said pin and engaging said body and swinging member respectively, and a screw carried by the swinging member and movable into engagement with said pin to prevent movement of said swinging member with respect to said body.

in testimony whereof I affix my signature in presence of two witnesses.

BENGT M. W. HANSON. Witnesses W. M. Sronns, W. H. MILLER.

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