US834877A - Automatic cutting-tool. - Google Patents

Description

110,934,877.; PATENTTD Nov. e, l190e. w. D.. ALLEN an G. A. JOHNSON.

AUTOMATIC CUTTING TooL; APPLICATION FILED DBO. 1. 1903'. l

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UNITED STATES PATENT oEEIoE., T

VVILLIAM- D.,ALLEN AND yGrUSTAVE A. JOHNSON, OF NEW HAVEN, CON- NECTICUT, ASSIGNORS TO .THE MARLIN FIREARMS COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

No. 834,877. l l

Specification Vof Letters Patent.

Patented Nev. e, 190e.

Application led December 7, 1903. `Seriell No. 184,038.

Lo a/ZZ whom/zit may concern.'

Be it known that we, WILLIAM D. ALLEN and GUSTAvE A. JOHNSON, citizens of the United States, residing at New Haven, in the county of New Haven, State of Connecticut,

have invented certain new and useful Improvements inAutomatic Cutting-Tools, of which the following is a full, clear, and exact description. i

Our invention relates to improvements in tools, andparticularlyto a taper-cutting tool for automatic screw-machines. Constructions of this character are valuable only in so far astheir operation is reliable. This depends not onl upon the construction and cooperationof tfie parts, but upon their accessibility and freedomfrom likelihood of cloggingduring the operation, as well as the ease withwhichalubricant may be applied. Itis the object of this invention to construct a cutter of such a form, arrangement, and method of operation that the parts may be freelylubricated during the cutting operation and so Athat the chi s will not clog up the tool and prevent its e ective operation and to perfect the arrangement of cutter 'and abutmentl or saddle forvthe work, so vthat the operationmay be reliable and efficient at all times, andso that the movement of the cutterk may besty conform to the angle of taper also provided-to serve as a support for the stock during the cutting operation. This Saddle is connected by a pivoted lever and link with the cutter, so as to approach and recede from the axialcenter ofthe tool as the cutter moves in its corres onding manner. Means are provided for e ecting the initial position of the cutter and the saddle. This tool when in. operation is carried by a turret,l

whichis fed towardthe head-stockof the mament of the saddle.

`tion ofthe tool. Fig. 3 isa plan view of the chine, as is common in tools ofthis character, but is adapted to coact witha guide which has a suitable movement for effecting the `proper movement ofthe cutter to give the desired taper. The mechanism for controlling the movement of the guide with which this rtool coacts is shown more fully and claimed in our Patent No. 831,816, dated September I, 1906. This particular invention relates to the cutting-tool, and it will be more fully seen on an inspection of the accompanying two sheets fof drawings', in which- Figure 1 is an end elevationof the tool em- Ebodying the improvements of our invention,

suggesting also -inl fragmentary details thev cross-slide and guide for eifectingpthe cutting movement ofthe cntter and the radial move- Fig. 2 is a side elevatool, suggesting fragments of the turret7 having a horizontal axis at right angles lto the direction of movement of the stock and thev cross-slide with guidevattached for coacting with the cutter. Fig. 4 is a rear view of the the lplane of the line X X, Fig. 4, looking to the eft. Fig. 6 is a bottom view ofthe tool,

cutting machine, which extends from-.left tol right and affords a guide for the turret-support as it is fed toward and away fromv the stock 30.

The turret in this form ofconstruction is mounted on a horizontal axis at right angles to the bed.

4 is afragment of thefront cross-slide which carries one of the cutting-off tools and alsov the guide for effecting the proper-movement of the cutter. 5 indicates the bed of the crossslide, and 6' indicates the guide. p

7 is a block whichlfits closely in a guideway lin the body of the tool and carries the cutter 8. This cutter is slotted and securedv inv place in the cutter-block by a screw 9. When this screw is loosened, the position of the cut- `ter may be adjusted by the screw 1,0. The cutter-block is mounted so as to, guide the Fig. 5 is a cross-section -of the tool on` Fig. 7 is a cross-section onthe plane of'the IOO `tion, as it may be termed, is shown particularly in Figs. 3, 4, and 6. Although Fig. 5 is a crossfsection on the line X X, the bottom `of the guide for the block 7 is shown as if it were entirely in this plane. It really has a slight forward inclination. The block is normally held in the position shown in Fig. 1 by means of the spring 11, which engages a projection 12, carried by the block.

13 is an adjustable screw which takes into the block and, coacting with a shoulder on the block, affords a stop to prevent the outward retraction of the block and also to enable the operator to adjust the block against the action of the spring 11.v If it should be desired to operate the cutter without the automatic tapering mechanism, the block is provided with a bearing member 14, of specially-hardened Steel, so that it may coact with the guide 6.

15 is a companion block which is mounted to slide in a radial direction and carry the saddle 16, which forms an abutment or shoulder for the stock to hold it in place as a cutter is operated.

l 17 is a'screw which'passes through this saddle and secures it to the block.

18 is an adjusting-screw which may be employed to adjust the position of. the saddlewhen the screw 17 is loosened.

The saddleblock is connected with the cutter-block, so as to movetoward the center as the cutter advances and to be retracted from the center as the cutter is retracted, so as to afford an abutment or bearing for the stock at all times during the cutting operation. The cutter and the saddle, therefore, are caused to move in` accordance with the taper desired. (The cutter and the saddleblock are connected by the mechanism shown particularly in Fig. 1.

-19 is a lever` which is pivotally secured to the body of the tool by the screw 20.

21 is a pin carried ,by the cutter-block 7, which forms a means of connection between the lever and the cutter-block, the lever being slotted to afford a slight sliding engagement, since the block has a straight line movement andthe lever rocks on its axis.

22 is a link which is connected to the rock ing lever by the pin 23 and which engages a pin 24, carried by the saddleeblock. link and lever may both be removed readily by simply releasing the screw 20.

During the operation of a device of this character it is advantageous to afford ready means of very free lubrication. This we ef'- fect by cutting away the top of the body of .the tool.

The l We also provide for the ready escape of the lubricant, together with the chips and cuttings, through the two large outlets 25 and 26, as shown particularly in Figs. 3, 5, 6, and 7 The operation of our invention is substantially as follows and will be readily understood by one familiar with the art of taper cutting. The stock is held against longitudinal movement and is rotated in any suitable manner. The turret is then advanced toward the stock with the tool in the proper position. When the bearing member 14 of the cutter-block engages the guide 6, which is carried by the cross-slide, the cutter is forced inwardly to the position which will effect the cutting of the stock into the smallest diameter of the taper desired, the adjustment being properly effected. The guide 6 is then allowed to recede graduallyT or move toward the front by means of suitable mechanism, as set forth in our other patent referred to, as the cutter continues toward the head-stock.V This allows the cutter to recede and approach the largest diameter of the taper desired. The longitudinal movement of the turret, the stopping of it in its proper positions, and the feeding of the cross-slide, except the receding of the guide while tapering, is common to other constructions. As soon as the cross-slide moves sufficiently far the guide 6 is disengaged from the cutter-block .and allows the spring to throw the cutter-block entirely out of engagement with the work. As the cutter approaches the stock the saddle in like manner follows up on the other side to correspend, so as to always afford a steady bearing. It will be noted in this particular that the cutting-point of the cutter 8 is always slightly in advance of the saddle 16, so that the bearing of the saddle comes upon a surface which has already been finished by the cutter. It will be apparent to those skilled in this art that our invention is susceptible of modifications or changes Without departing from its spirit or scope.

This invention has been used on an automatic screw-machine and found effective. Tn such use the general operation of the machines is in no way different than with old devices except the slight receding movement of the cross-slide and guide while thc taper is being cut.

What we claim is- 1. An automatic cutting-tool com )rising a body portion, a cutter-carrying bloc i slidably mounted therein, a spring for normally retracting said block and an adjustable screw taking into a tapped hole in said body and coacting with said block for advancing said block against the action of said spring.

2. An automatic cutting-tool comprising a body portion, a cutter-supporting block slidably mounted therein, a bearing member car- TIO ried by said block, 'a spring mounted in said body portion and coacting with said block to retract the same and an adjustable screw af- ,rality of guideways7 a cutter-carrying block mounted to slide in one of said gudeways, a saddle-carrying block mounted to slide in another of said guideways, operative means of connection between said blocks to cause them to approach and recede from the axis of said tool simultaneously, a spring for normally retracting said blocks and causing them to move away from the axis of said tool and adjustable means Jfor limiting the outward retraction of said blocks.

WILLIAM D. ALLEN. GUSTAVE A. JOHNSON.

Witnesses:

MAHLON H. MARLIN,

M. L. Postr.

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