US1085800A - Box-tool. - Google Patents

Description

W. GRANDALL.

' BOX TOOL.

A APPLIATION FILED NOV. l5,- 1912. 1,085,800. Patented Feb;3-, 1914.

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W. CRANDALL.

BOX TOOL.

' APPLICATION FILED Nov.15, 1912.

Patented Feb. 3, 1914.

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N TEI) STATES PATENT OFFICE.

WILLIAM CRANDALL, 0F CLEVELAND, OHIO, ASSIGNOR TO THE NATIONAL-ACME MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

BOX-TOOL.

Specification of Letters Patent. j

Application led November 15, 1912. Serial No. 731,488.

from the work so that when the tool moves away from the work it will not score or mark the same, but leave the work with a clean cut.

In the drawings accompanying and form-i ing part of this specification Figure 1 is a top view of this improved box tool; Fig. 2 is an end view thereof; Fig. 3 is a diagrammatic view illustrating in full lines the position of the tool when at work and in dotted lines the position of the tool when free of the work; Figs. 1 and 5 are detail views illustrating the supports for the tools; and Fig. 6 is a view illustrating the end working tool and its means of adjustment.

Similar characters of reference indicate corresponding parts throughout the figures of the drawings.

The box tool comprises the usual holder 2 having a shank 3 for attachment to the turret head or other means of support, the usual stock or work engaging rolls 4 and 5, the holder being bored as at 6 in the usual manner. Carried at one side of the bore of this holder is the tool support comprising in the present instance a compound slide 7, one member or block, as 8, of which is supported for vertical adjustment on a lateral projection 9 of the holder 2. This projection is provided with a perpendicularly disposed slide-way 10 for the reception of a tongue 11 of such slide 8. This projection 9 is provided with an elongated slot 12 through which extends a threaded rod 13 carrying a clamping nut 14C at its end. For vertically adjusting this slide 8 to thereby set the tool for different sizes of work it is provided at one side of its slide-way with a curved recess into which fits the edge of an adjustable washer 15 which is adjusted up and down by means of a screw 16 extending into an opening in the projection 9. Supported by the slide 8 is another slide member or `block 17 which carries the tool or blade 18. This slide 17 is provided with an inclined slideway 19 adapted to t an inclined tongue 2O carried by the slide member 8. This tongue and slide-way, 2O and 19, extend upwardly as it were from the outer to the inner ends adjacent to the bore of the tool holder. The sliding member 17 is provided with a tool receiving opening 21 located at an angle or inclined to the axis of the tool holder so that the tool will be supported in such position as to bring its outer end in position adjacent to the work or stock supporting rolls hereinbefore mentioned. The tool is secured in position by means of an adjustable clamping screw 22. For securing the slide member 17 to the slide member 8 a headed screw 23 projects into a shouldered or countersunk smooth bored opening 24 of the slide member 17, the threaded end of said screw extending into the threaded opening 25 of the slide member 8. The diameter of this screw or bolt 23 is less than that of its opening 211, so that the slide block 17 can have a sliding back and forth movement by reason of the slide-way between this block and its companion block 8. Located at right angles to the opening 24 is an opening 26 in which is located a spring pressed plunger 27 in position to engage the side of the screw bolt 23. For adjusting the slide member 17 relatively to this bolt an adjustable screw 28 extends through a threaded opening into engagement with the bolt at the other side thereof opposite to the location of the spring pressed plunger. This plunger is located at the forward side of the bolt 23, that is to say at that side thereof nearest to the cutting end of the tool.

In the present instance the tool is so oarried that it will make what is known as an over-cut, being set to cut on the center of the face of the work, and as hereinbefore stated is located at an angle by reason of the angular location of the tool receiving opening. The tendency of the spring plunger hereinbefore referred to is to lift or hold the tool up slightly from the work by reason of its engagement with the bolt 23, in other words the tendency of the spring, by reason of such engagement .with the bolt 23, is to move the slide 17 toward the work, thus carrying the tool forward beyond the center of the work, as shown by the dotted lines a, F ig. 3.

ln practice the cutting tool is set a little ahead of the center of the work as shown at ai, Fig. 3. In consequence, when the work is rotated it engages the end of the tool, and by reason of the spring plunger hereinbefore described the tool and its slide block 17 are forced back on its slide way and therefore downwardly, by reason of the inclination of such slide-way, and thus the tool is forced back into -a position where it is on the center, as at Z) 7, Fig. `3, so thatthe tool will make a shearing' over-cut on the center of the work. 'Vhen the stock has been cutdown from c to d and the entire chip or'chips removed so as to leave the stock of the diameter shown at d, Fig. 3, the spring' will force the tool block 17 and thereby the tool forward and leave it, by reason of the inclined slide-way, in the position shown at a dotted lines, thus lifting it from the `finished piece so that the tool can be backed oif without scoring or marking or injuring or otherwise mutilat* ing the work.

From the foregoing it will be thus observed that the tool is supported for shiftable movement relatively to the tool holder, so that when the chip has been completely taken from the work the tool will be alitomatically lifted and shifted slightly forward of the center of the work, so that it will be free of the work, the work itself constantly holding the tool back into its pro-per center cutting position through the medium of the inclined slide-way. Thus it will be observed that the strain of the cutting maintains the tool in its proper center position and that as soon as the strain is off the tool the to-ol immediately shifts forward by reason of the spring so as to clear the work. The amount that the tool is set beyond the center depends on the difference or clear'- ance between the diameter of the screw bolt 23 and the diameter of its opening 24. It will also be observed that in the present construction the tool recedes backward to its cutting position, and the block which carries it is supported throughout practically the entire length of that block, so that 'there is no opportunity for the tool to vibrate, while at the same time by reason of such support a heavier cut may be made by the tool, which would not be the case if the block vas only supported by a pivot remote from the cutting point. In the present improvement the box tool holder also carries an end cutting' tool 30 which is supported for adjustment toward and from the work by means of a slide block 3l having an clon gated slot 32 therein for the passage of a clamping screw 33, this slide block being carried in a recessed portion 34 of the hol der and is provided at its tool supporting end with an angular recess 35 opening at one side of the block 3l. One side of this angular recess is cut away to form an inclined wall 36 and located therein is a wedgeshaped member 37, the straight edge of which 3S is in position to engage one side of the tool 39. An adjusting screw passes through the holder 3l and into the wedgeshaped member37 whereby on adjusting this screw downwardly the wedge-shaped portion or block 37 is `drawn up and so more hrmly holds the tool in its slot.

I clai-m as my invention l. A box tool holder having a blade supported to make an over-cut on the center, and means including an inclinedly supported part for automatically lifting and moving it forward from the work when the cutting operation is completed.

2. A boX tool holder having a cutting blade supported to make an over-cut on the center, and means including an inolinedly supported vpart for maintaining the working end set beyond the center and effective to permit the work to move the tool backward to its cutting position to'center it.

3. A box tool holder having a cutting blade, a slide for supporting it, one of said parts being carried by an inclined part and means for moving said slide to project the cutting edge of the tool beyond the center of the work and effective to permit the movement of the tool and its slide to center the tool when in engagement with the work.

l. A box tool holder having a blade supported `to make an over-cut on the center, and means for automatically lifting it from the work when the cutting operation is completed, and including a tool supporting block, an inclined slide-way, and a spring.

A box tool holder having a blade supported to make and over-cut on the center, and mea-ns for automatically lifting it from the work when the cutting operation is coinpleted, and including a compound slide having an inclined slide-way and a spring.

6. A box tool holder having a blade supported to make an over-cut on the center, and means for automatically lifting it from the work when the cutting operation is co1npleted, and including a compound slide having an inclined slide-way, a bolt connecting the members of said compound slide and having less diameter than the opening for said bolt, and a spring carried by one of the members of said compound slide to engage said bolt.

7 A box tool holder having a cutting blade, a compound slide for supporting it, means for adjusting said slide according to the size of the work, said compound slide having between the members thereof an inclined slide-way, a threaded bolt connecting' the members of said compound slide and having less diameter than the opening therefor, through one of the members of said` compound slide, and resilient means carried by one of the members of said compound slide for engaging said bolt whereby the cutting end of the tool will be projected beyond the center of the work and whereby the work will center the tool when in engagement with the work.`

8. A box tool holder having a cutting blade supported to make an over-cut on the center, and means for supporting said blade and comprising a compound slide, means for adjusting said Slide according to the size of the work, said compound slide having an inclined slide-way between the members thereof and inclined upwardly toward the end of the cutting tool, the outer slidey member having an angular opening .for the reception of the cutting blade, means connecting said slide members, and means carried by the outer slide member and. in engagement with said connecting means for permitting the movement of the blade and its supporting member relatively to the work.

9. A box tool holder having a cutting blade, and means for supporting said blade and automatically operative to lift the blade from the work when the cutting operation is completed and effective to permit the tool to recede to its cutting position, and an inclined way for supporting one of said parts.

10. A box tool holder having a cutting blade, and means for supporting said blade and automatically operative to lift the blade from the work when the cutting operation is completed, and including a supporting block movable in an inclined plane relatively to the axis of the work.

11. A box tool holder having a cutting blade, and means for supporting said blade and automatically operative to lift the blade from the work when the cutting operation is completed, and including a supporting block movable in an inclined plane relatively to the axis of the work, and means for pressing said block toward the work.

l2. A box tool holder having a blade, means for supporting it and comprising a block movable in an inclined plane relatively to the axis of the work, and means for shifting said block toward the work.

13. A box tool holder having a blade, means for supporting it and comprising a block movable in an inclined plane relatively to the axis of the work, and means for shifting said block toward the work and comprising a spring pressed plunger carried by the block and a fastening device pro jecting through the block for engagement with said plunger and having less diameter than the opening in said block.

14. A box tool holder having a blade, means for supporting it and comprising a block movable in an inclined plane relatively to the axis of the work, means for shifting said block toward the work and comprising a spring pressed plunger c-arried by the block, a fastening device projecting through the block for engagement with said plunger and having less diameter than the opening in said block, and means for adjusting the block relatively to said fastening device.

15. A box tool holder having a blade supported to make an overcut on the center, and means for supporting said tool and effective to permit it to recede to its cutting position, one of said parts being carried by an inclined part.

16. A box tool holder having a blade supported to make an overcut on the center, and means including a sliding block for carrying said tool, and effective to permit the tool to recede to its cutting position.

17. A box tool holder having a blade supported to make an overcut on the center, and sliding means for supporting said tool and effective to permit it to move forward and upward from its cutting position, and to recede backward and downward to its cutting position.

18. A box tool holder having a blade supported to make an overcut on the center, and means for supporting said tool and effective to permit it to move forward and upward from its cutting position, and to recede backward and downward to its cutting position, said supporting means including a movable block supported at various points along the same throughout the various positions of the tool.

19. A box tool holder having a blade supported to make an overcut on the center and means for supporting said tool, and including a movable means having a continuous point of support throughout. substantially its entire length, and effective to permit the tool to recede to its cutting position.

ILLIAM CRANDALL.

Vitnesses PAUL E. RYAN, Oso-lu A. SMITH.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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