US1517491A - Forming tool for channeler bits - Google Patents

Description

Dec. $1 24 1,517,491

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L. c. BAYLES FORMING TOOL FOR CHANNEL-ER BITS Filed Jan. 24, 1924 2 Shaets-Sheet. 2

h I I I an'uawtoz I Zea/7'6 C Be les Patented Dec. 2, 1924.

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LEWIS C. BAYLES, OFEASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL- RAND COM- PANY, 0F JERSEY CITY, NEW J ERSEY, A CORPORATION OF NEW JERSEY.

FORMING TOOL FOR CHANNELER BITS.-

Application filed January 24, 1924. Serial No. 688,175.

T 0 (all whom it may concern:

Be it known that I, LEWIS C. BAYLES, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a. certain Forming Tool for Channeler Bits, of which the following is a specification accompanied by drawings;

' This invention relates to rock drilling and more particularly to devices for forming or sharpening the bits of channeler steels.

In certain types of channeler machines, the cutting is done by gangisteels assembled from a number of steels laid side by side and having edges of various forms and in clined at various angles. A not uncommon arrangement of steels is that in which alternate steels are provided with cutting edges parallel to one face of the shank while the intermediate cutting edges are arranged diagonally. The cutting edges of these bits areusually longer than the corresponding dimensions of the shank. That is to say, they are flared out in forming, so as to cut a channel in the rock slightly wider than the shanks, to provide a desirable clearance. Preferably the shanks of the individual drill steels are rectangular in cross section, somewhat narrower than they are deep.

In forming the diagonally disposed bits, it is desired that the shank be held rigidly against rotation and this has been diflicult to do by a machine, on account of the inclination of the cutting edge of the diagonal of the shank. The couple formed by the force of the swaging dies against the corners, tends to rotate the steel and produces errors in the shape of the bit. If the shank is held ina stationary vise or other fixed device during the swaging process, it is difiicult to produce exactly the right inclination in the flattened faces of the bit.

It is accordingly an object of this invention to enable a person. forming bits on the steels of this character to hold the steel against rotation without interfering wiih the lateral or up or down movement with respect to the swaging dies.

Other objects of the invention become apparent from the following description, taken in connection with the drawings showing one embodiment, and in which Figure 1 is a perspective view showing a number of steels grouped together to form part of a gang steel for use in a channeling machine;

Figure 2 is a cross section of one of the steels having an angularly disposed cutting edge;

Figure 3 is a perspective view in vertical longitudinal section of the swaging dies and a member for holding the channeler steel against rotation;

Figure 4 is a perspective view in longitudinal vertical section showing a steel in position between the dies and indicating the manner in which steel is permitted to move downwardly during the process of forging or swaging;

Figure 5 is a perspective view of the lower dies and a member for holding a channeler steel against rotation;

Figure 6 is a perspective view of a bit having its cutting edge diagonally disposed in one direction, and

Figure 7 is a perspective View having its cutting edge diagonally in theother direction.

Referring to the drawings, Figure 1 shows an ass'emblyot steel for use in the channeling which comprises a plurality of steels A, havingcutting edges parallel to the longer faces of the shank while the steels B, C and D, which are placed between the steels A are each provided with a bit having a cutting edge diagonally disposed. As shown in Figure 1, the edges 13, C and D are alternately right and left hand. That is to say, the diagonals alternate their inclination. The reason for arranging the steels in this Inanner,'is sothat the entire group of steels moving gradually along the channel present cutting edges which are inclined at various angles of the faces of the rock and more easily cut the width therein.

In Figure 2 there is shown a cross section of one of the diagonal edges, such as for instance B, the edge being shown at broken lines E. In forming such a bit, the steel must, be laid on the forming dies or anvil with its diagonal F-Fparallel to the faces of the die. Blows are struck against the steel at the corners G to form the flattened faces H of the bit. When the steel is in this position, blows struck in this manner tend to rotate the steel.

The device for swaging the bit on the steel is shown in Figures 3, l and 5, in which there is provided a pair of dies J and K which are adapted to reciprocate toward each other in any suitable manner such as in the drill steel sharpener, a drop hammer Or other forging machines. The lower die K is provided with a flat face L and the upper die J is provided with a similar flat face 0, opposed to the face L and inclined thereto at an angle corresponding to the desired inclination of the face .H of the bit.

Preferably the lower die K is stationary and .is provided with a rearward extension P having a T-slot Q extending laterally therein. Means for holding the shank of the steel is provided andcomprises aholding member or block R having a dove-tail S on its lower face by which the block R is freely slidable laterally in the T-slot Q. In the upper portion of the block it there are provided slots T and U angularly disposed with respect to each other, each of the slots being just wide enough to receive the rectangular shank of the steel. If it is desired to form a right handed bit as for instance C, a steel is inserted in the slot U. If it is desired to form the left hand bit, such asshown at B, the steel is inserted in the slot T which is at an angle to the slot U and therefore forms the bit with its cuttingedges inclined in the opposite direction. The slots T'and U are sufliciently deep so that the shank of the steel does not quite reach the bottom when the bit has been completely forged. It is noted that when the steel is first placed between the die and in one of the slots, such as for instance U, the steel extends a considerable distance in the slot and away from the bottom. thereof, but'as the swaging. proceeds the steel sinks down into the slot and the depth thereof is sufficiently deep so that the steel may never rest at the-bottom of the slot. The process of forming-the steel bit is indicated in Figures 3, 4, and 5. Referrin to Figure 3, unformed steel is fitted in the slot, as for instance U in the block or holding member R so as to extend well in between the dies J and K. With the steel in this position, blows are struck on the steel by means of-the upper die J which gradually flattens out the end of the steel to the shape shown in Figures 4 and 5. As the end of the steel is flattened out, its shank drops down in the slot U and the holding member R slides laterally in the T-slot Q so as to permit the lowering of the steel. If desired the block It may be arranged to move vertically with respect to the die K so as to drop the steel vertically without permitting rotation. In swaging the steel, a feather Vmay be formed on the extreme end of the bit which may be thereafter cut off, and the bit sharpened in any desired manner.

I claim:

1. A device for forming channeler bits, comprising a pair of swaging dies adapted to reciprocate toward and away from each other, the opposing faces of said dies being angularly disposed with respect to each other, and means for holding the bit against rotation only, while in position between the dies, whereby free lateral and vertical movement thereof is permitted.

2. A device for forming channeler bits, comprising a pair of swaging dies adapted to reciprocate toward and away from. each other, the opposing faces of said dies being angularly disposed with respect to each other, and means for holding the bit against rotation only, while in position between the dies, comprising a holding member slotted to cooperate with the sidesof the drill bit and slid ably mounted on one of said dies.

3. A device for forming channeler bits, comprising a pair of swaging dies adapted to reciprocate toward and away from each other, the opposing. faces of said dies being angular-1y disposed with respect to each other, and means for holding the bit against rotation only, while in position between the dies, comprising a holding, member slidably mounted on one of said dies to permit the lateral movement, and slotted to cooperate with the sides of the said bit whereby said bit is permitted vertical and lateral movement.

at. A device for forming channeler bits, comprising a pair of swaging dies adapted to reciprocate toward and away from each other, the opposing faces of said dies being angularly disposed with respect to each other, means for holding a rectangular bit against rotation only, while in position on a diagonal of the bit between the dies.

A device for forming channeler bits comprising a pair of dies adapted to reciprocate toward and away from each other, said dies being angularly disposed with respect to each other, th lowermost die being provided with a T-slot, a holding member slid-able laterally in said T-slot, and apertured to receive the drill steel for holding the latter against rotation only whereby said channeler bit is permitted to move vertically and laterally with respect to said swaging dies.

In testimony whereof I have signed this specification.

LEWIS O BAYLES.

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