US1438324A - Machine for cutting key seats - Google Patents

Description

R. J. MILLER. MACHINE FOR CUTTING KEY SEATS.

v APPLICATION men me. I6. 1920. 1,438,324, Patented Dec. 12, 1922.

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APPLICATION FILED AUGJB. I920.

Patented Dec. 12, 1922.

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J Y M' ATTORNEY B. I. MILLER. MACHINE FOR CUTTING KEY SEATS.

APPLICATION FILED AUG. I6. 1920.

Patented Dec. 12, 1922.

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I APPLICATION FILED AUG. 16,- 1920. 1,488,324, Patented Dec. 12, 1922.

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hddd i MACHINE FOR CUTTING KEY SEATS.

Application filed August 16, 1920.

To aZZ whom it may concern:

Beit known that I, RAYMOND J. MILLER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Machines for Cutting Key Seats; and I do hereby declare the following to be a full clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference numerals marked thereon My invention relates to metal, working machinery and more particularly to slot-ting machines and it has for its object to provide an improved machine of this character for accurately cutting a key slot in a gear or other member, and which is adapted for cutting such a slot on a taper, that is, with a bottom inclined to the aXis of the workpiece. A further object of the invention is to pro vide a simple, convenient, and serviceable machine for cutting such slots which shall be of rigid construction to enable quick and accurate operation thereof and which shall be capable of cutting a slot the bottom of which is parallel or at any desired angle to the axis of the work in which such slot is made. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel. features being pointed out in the claims at the end of the specification.

In'the drawings:

Figure 1 shows a side elevation of my machine;

Figure 2 a right hand end view of the machine shown in Figure 1;

Figure 3 is a top plan view:

Figure 1 is a left hand end view of the top of the machine shown by Figure 1;

Figure 5 is a view similar to Figure 3 with the pressure arm and work clamping means removed from cooperation with the work;

Figure 6 is a section on the line 66 of Figure 7;

Figure 7 is a section on the line 'Z*7 of Figure 3;

Figure 8 is a section on the line 88 of Figure 10;

Figure 9 is a view similar to Figure 7 but with the work table in an inclined position;

Figure 10 is a section on the line 10 10 of Figure 7,

Serial No. 403,793.

Similar reference numerals throughout the several views indicate the same parts.

Machines of the class described may comprise a reciprocating tool frequently with a serrated edge, a work table through which the cutting tool operates, and a reciprocal driving member for the tool located beneath thework table, which driving member affords the only guiding means for the cutter. Among the principal features of my invention may be enumerated the facility of adjustment, ease of operation and accuracy of result of the machine, whether the bottom of the slot cut thereby be parallel with or at any angle to the axis of the work.

Referring to the drawings, numeral 10 indicates a pedestal support of cast iron or other suitable material provided on one side thereof with a door 9 to afford ready access for adjustment and lubrication of the parts within. The power for operating the machine may be transmitted to a fixed and loose pulley 11 on one end of a shaft 12 mounted in the bearing 13, and on the other end of which is provided a gear 14 in cooperation with another gear 15 mounted on a spindle 16 within a bearing 17. Projecting from the gear 15 is a pin 18 surrounded by a bushing 19 adapted to move back and forth in the slot 20 to produce a reciprocation of the cross head 21 carried by the guides 22 which in the embodiment shown by Figure 6 is a part of the frame containing the bearings 13 I and 17. To position the cross head in the guides 22 end strips 23 are secured to the guides by means of bolts 24 or other fastening means. Located adjacent the top of the cross head and guided thereby is the cutting tool 25 secured thereto by the clamping device 26 and adjusting screw 27. In order to move the clamping means 26 and cutting tool laterally of the cross head to properly aline the tool with the slot 29 in the work 30 the adjusting screw 28 is provided in'the cross head and in cooperation with the clamping means 26. Pivoted to the top of the pedestal 10 about the rod 31 by means of the depending lugs 32 is the guide frame which is adjustably secured in position by means of the clamping bolts 34 cooperating with the arcuate shaped slots in the depending members 35 at the other end of the guide frame from the pivot 31. As a further means to insure the guide frame being held in adjusted position, a stop or limiting device is shown as comprising a threaded rod. extending from the pedestal and provided thereon with a lOLf nut to secure the stop device and guide frame 53% in position should for any reason the bolt; l become loose. idably mounted upon the snide f rune i tie work table 39 which in my embodiment shown is movable slot-1g; the guide frame by means of a rack 621 and pinion l secrred respectively to the work table and guide frame and provided with a handle 42 by means oi? which the work may be moved into or out coopera ion with the cutting the other or e of the work table operating handle 1s provided a or limiting; mechan sm therefor coman adjustable pin 5'? and lock nut d into a depending edge of the and Int-ed to cooperate with the adiacent edege o itate in adjustably and guide frame the deamount when the key slot is t be out n angle, graduations 38 be provided on the end or the depending}; members as i .hown in Figure 4:.

The work 30 may be positioned and clamped upon the table 39 by any well known HEQEIHS, but for purposes of illustration I have shown erode centering and bracket for the work which is slidable in the groove adjiiistable along the. table by means 01 the clamping bolt 44 in cooperation with the under cut groove 45 in the .top of the table. To enable gears or other work. 30 of diflt'erent size to be slotted with out changing the position of the guide bracket e3 and to enable slots 29 of dili erent depths to be cut in. the work. I have shown the table 39 as provided with a longitudidisposed. perforation 4-6 and although, the embodiment shown, this perforation is closed on all four sides by the table it will nevertheless be understood that other terms of grooves or perforations may be used with equal facility For purposes of clamping the work upon the table, threaded posts d7 are provided and. between which entends the clamping; brace 4-8 provided with a work clamp 49 4 ads adjustable to fit different heights of work by means of the threaded. stem 50 in cooperation with the clamping brace 48. v Adjacent one end ot the guide frame is provided the upstanding: post 51 to which is secured the adjustable carrier 52 for receiving; the pressure arm 53 made adjustable in length by threaded cooperaprovided with a hardened point 54 adapted to cooperate with the rear, of the cutting tooland press or hold. the same in engagement with the work. In the form of my invention illustrated, the arm 53 does not guide the cutting tool prevent lateral movement thereof. but merely presses the tool into eng g'agei'nent with the work while the cross head 21 is the sole means allerded for guiding the cutting tool. in Figure 5, the clamping brace is shown out of cooperation with one of the threaded rods 4:? to enable the work to be removed. For this same purpose, the pressure rod is made jointed by having); the outer end pivotally supported at 55 to enable the work to be withdrawn over the cutting tool and a new piece inserted. In order to give the pressure arm 53 the necessary rigidity and yet have it jointed as shown the sleeve 56 is provided over the pivoted joint to securely hold both parts of the arm in alinement. When it is desired to remove the outer end from cooperation with the cutter 25, the sleeve 56 may be easily slid out of engagement with the joint 55 while stop or pin 60 is provided on the arm 53 for holding; the sleeve in position over the pivot.

In operatiom power received by the pulley 11 is transmitted through the shaft 12 gears M- and 15, pin 18 to the cross head 21. which reciprocates the cutting tool 25. To enable the slot 29 to be cut at any desired angle, the guide frame is tilted and adjusted in the correct inclined posh tion by means of the clamping bolts and.

the additional stop mechanism 36, it desired. fitter arranging the parts in the manner shown by Figures and 7, the operating handle 4.2 may be moved to give the work 30 any -:lesired rate of feed and the stop mechanism 5? which has been previously set to limit the depth of cut enables the depth of slot to be given to a number of pieces of work. To remove the work and insert a new piece in position it is only of adjustment whereby a key slot may be cut with its bottom parallel to or at an angle with the axis of the work, and the degree or" incline or slant tobe given tothe bottom of the key slot may be easily determined by the graduations 38; The simplicity of: this type of hand operation enables" 1 ,aeaeea any desired rate of feed to be obtained, while the stop mechanism 57 insures the same amount of out being given to a number of different pieces of work. The facility with which the clamp 49 and the pressure arm may be removed to enable the work to be removed and a new piece of work inserted, is an advantageous time saver. The adjustment 28 which is made easily accessible by means of the door 9 enables cutting tools of diiterent widths to be used and enables the center line of the difierent tools to be always alined with the same center line of the work or slot to be cut. Because of the rigidity of the cutting tool, a better and more accurate slot can be obtained than is possible with the older, slower, and less reliable machines inwhich the taper is cut by tilting the tool instead of the work and its bed.

I claim as my invention:

1. In a slot cutting machine, the combination with a work table provided with an aperture and a reciprocatory tool operatingmember movable in substantial alinement with said aperture and provided with a transverse guide, of a tool holder for clamping a tool in operative position to work through the aperture, and means for adjusting the tool holder in the transverse guide.

2. In a slot cutting machine, the combination with a slidable work table provided with a perforation, of a cutting tool mounted for reciprocation through said perforation, operating mechanism for said tool, a holder for clamping the tool in operative position, said holder being adjustable to fit tools of different widths and means for adjusting the holder transversely to aline the tool with the slot to be out.

3. In a slot cutting machine, the combination with a support, of a tilting work table and guide therefor adj ustably pivoted to the support, a cutter mounted on one side of said work table and a pressure arm of adjointed to swing upon itself and being provided with a sliding sleeve for holding the jointed portion in operative position.

l. In a slotting machine, the combination with an adjustably tilting work table, of a cutting tool mounted for reciprocating movement relative to the table, a driving member for the cutting tool attached thereto and means for securing the tool to the driv ing member, said securing means embodying a clamping member adapted to fit different widths of tools and being laterally movable relative to the driving member to aline the tool with the center line of the work, and means independent of said clamping member for so moving the securing means laterally.

5. In a key slot cutting machine, the combination with a support, of a tilting guide member adjustably pivoted thereto, a work table slidable on the guide member, means for clamping the work on the table, a serrated cutter, adjustable stop devices for limiting movement of the work table and of the guide member, a hand operated feed mechanism for sliding the work table over the guide member, a jointed pressure arm adjustable as to length and height in cooperation with one side of the cutter for holding the same against the work, a reciprocat-- ing driving member for the cutter located beneath the work table and adjustable clamping means on the driving member adapted to receive cutters of different widths, said clamping means being adjusta ble relative to the driving member to aline the cutter with the transverse axis of the work.

RAYMOND J. MILLER.

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