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Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
  • B21K5/00—Making tools or tool parts, e.g. pliers
  • B21K5/02—Making tools or tool parts, e.g. pliers drilling-tools or other for making or working on holes
  • B21K5/06—Dressing, e.g. sharpening rock drills

Definitions

• My invention relates to improvementsin means for shaping and sharpening the bits of machine rock-drills, my object being to make it practicable to form the wings of the drillbit thicker at their outer edges than near the center, since the outer edges of the wings have the greater part of the work to perform; and to this end'the invention consists of the features hereinafter described and claimed, all of which will be fullyunderstood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.
• Figure 1 is aplan view of myimproved device shown in connection with suitable operating mechanism
• Fig. 2 is a section taken through the same on the line a; :13, Fig. 1.
• Fig. 3 is a detail View of one of my improved die-blocks viewed in the direction of the arrow in Fig. 1 and shown'on a larger scale.
• Fig. & is a view looking in the same direction, showing both die-blocks with their hinged members open.
• Fig.- 5 is a face view of one of the die memberslooking at Fig. 3 in the direction of the arrow.
• Fig. 6 is a face view'of the sharpening and shaping tool or dolly.
• Fig. 7. is a side view of the same.
• Fig. 1 is aplan view of myimproved device shown in connection with suitable operating mechanism
• Fig. 2 is a section taken through the same on the line a; :13, Fig. 1.
• Fig. 3 is a detail
• FIG. 8 is a detail view of the wedge-shaped or beveled device for closing the hinged members of the die-blocks. of the drill-bit after it has been acted on by my improved device.
• Fig. 10 is a detail view showing the normal shape of the metal bar before it has been subjected to the action of my improved device.
• Figill is an end view of the device shown in Fig. 8.
• Fig. 9 is a detail view- Let the numeral 5 designate each of two cooperating die-blocks, which are so fashioned that when brought together face to face they form a sort of mold or matrix shaped to fit the head or cutting extremity of a drill-bit of dies are shaped to give the cutting extremity of the drill the shape shown in Fig. 9-that is to say, with their edges farthest from the axis or center of the bit thickest, as they have the most work to perform, as aforesaid.
• die-blocks 5 were solid, it is evident that the two wings occupying the grooves or re- I therefore provide each die-block with a member 5 hinged to the body of the block, as shown at 5* and adapted to open'to the position shown in full ines in Fig. 4: to allow the re lease of the drill-bit when the die-blocks are separated.
• These die-blocks maybe operated by any suitable mechanism.
• a suitable form of'operating construction is shown in Figs. 1' and 2, in which die-blocks 5 are shown as formed integral with a larger block A, slidably mounted in the frameB and operated by, cam members'Q-hinged to pitmen D, as shownat E.
• cam members are beveled or inclined on opposite sides and engage a recess formed in the topof'the block, which projects upwardly on opposite sides of the cam members and carries antifriction-rollers, which are engaged by the inclined faces of thecams duringthe operation of the latter.
• the pitmenare operated by eccentrics mounted on a" shaft F.
• a cross-head H is also mounted on the frame and connected with the eccentric-shaft byapitman I.
• Thiscrosshead carries adevice J, havingabeveledjextremity J, adapted to engage the hinged members 5 and close them and hold them in the closed position until the drill-bit has been shaped and sharpened by a dolly K, also carried by the cross-head.
• the bar When the blocks A are separated, the bar, shaped as shown in Fig. of the drawings, is placed in position between the parts 5 of the die-blocks, which as the shaft F is rotated are brought together, the hinged mem; bers 5 being in the position shown by dotted lines in Fig. 4 by virtue of the action of the part J.
• the dolly then engages one extremity of the bar and upsets it, spreading it out to fill the recesses 5 and5 of the die-blocks and at the same time sharpening the engaged extremity of the bit.
• said blocks having hinged members adapted to open to allow the wing of the bit to be removed after it has been shaped to conform to the shape of the recess.
• each block having a recess adapted to conform to the shape of a part of-a drill-bit or other tool
• the said blocks having movable members respectively adapted to open to allow the said parts of the tool held thereby, to be removed after they have been shaped to conform to the shape of the recesses of the said blocks.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Earth Drilling (AREA)

Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=2774664

Family Applications (1)

Country Status (1)

• 1901
  • 1901-09-26 US US7663501A patent/US706135A/en not_active Expired - Lifetime

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