US2626533A - Manufacture of bits for mining drills - Google Patents
Manufacture of bits for mining drills Download PDFInfo
- Publication number
- US2626533A US2626533A US120998A US12099849A US2626533A US 2626533 A US2626533 A US 2626533A US 120998 A US120998 A US 120998A US 12099849 A US12099849 A US 12099849A US 2626533 A US2626533 A US 2626533A
- Authority
- US
- United States
- Prior art keywords
- bit
- bits
- manufacture
- blank
- prongs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 9
- 238000005065 mining Methods 0.000 title description 5
- 238000005520 cutting process Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229940116024 aftera Drugs 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
- A01B35/02—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools
- A01B35/10—Other machines for working soil not specially adapted for working soil on which crops are growing with non-rotating tools mounted on tractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Definitions
- This invention relates generally to mining drills, and bits therefor.
- the object of the present invention is to provide a more economical process of manufacturing Y-bits, and toprovide a bit which will disintegrate the central core in a borehole without being subject to a high degree of breakage.
- Figure '1 is a'perspective view of the strip of bit stock from which the bits of the present invention are blanked;
- Figure 2 is a perspective view of an individual blank, cut from the strip shown in Figure 1, and showing in dotted lines the manner in which the prongs of the Y are diverged from the blank;
- Figures 3, 4, and 5 are, respectively, end, front, and side elevations of the blank after the first step of deformation, as shown in dotted lines in Figure 2;
- Figures 5, 6, and '7 are, respectively, end, front, and side elevations of the bit blank aftera further step of deformation;
- Figure 9 is a perspective view of the completed bit.
- the present invention contemplates the manufacture of Y-bits from a strip of bit stock whose cross-sectional dimension is the same as the cross-sectional dimension of the shank of the fill-1. ished Y-bit.
- a blank is cut from such a strip of stock; it is centrally slit for part of its length, and the slit portions then spread apart to form a Y-shaped blank, the spreading being preferably in the plane of the slit.
- the prongs thus formed are then further deformed and sharpened to provide the desired cutting edges.
- right angular cutting edges are provided at the b-ight between the prongs. which effectively disintegrate the central core in the borehole.
- a strip of steel stock I whose cross-sectional dimension corresponds to that desired for the shank portion of the Y-bit to be manufactured, is provided and a succession of blanks 2 is stamped from the strip l.
- the blanks 2 have one end tapered, as shown at 3, and the opposite end rounded, as shown at 4. Concentric with the rounded end 4 is a hole 5. Accordingly, in stamping the blanks from the strip I, the only waste is represented by the two opposite chips 6 adiacent the tapered and rounded portions. and the core from hole 5.
- the blank 2 is then slit lengthwise along line 1, shown in Figure 2, which is the longitudinal central axis of the bit.
- the slitting may be accomplished with a suitable shear. and terminates substantially short of the end of the blank wherein hole 5 is provided.
- the portions thereof which are separated by the slit are bent in opposite directions, as shown in Figure 2, to form prongs 8 and 9.
- the faces of the prongs 8 and 9, which were formed in the slitting operation be maintained substantially parallel.
- the blank is in the form shown in Figures 3, 4, and 5.
- the Y-shaped blank is then further deformed by bending the prongs 8 and 9 about the longitudinal axis of the unslit, or shank, portion, i. e. athwart the direction in which the prongs 8 and 9 diverge from the unslit portion, as shown in Figures 6, 7, and 8.
- the direction of the latter bending is preferably such as to tend to close, rather than to further open, the slit 1
- the tips l8 and II of the arms 8 and 9 are sharpened by grinding, to provide cutting edges at the extremities of the prong, and at the face which was formed by the slitting operation.
- the completed bit is shown in Figure 9, and consists of the prongs 8 and 9, having tips l and l l the said prongs being integrally connected with the unitary shank l2, which latter is adapted to be received in the head of an auger.
- edges I 3 and I4 formed by the slitting operation adjacent the bight, constitute cutting surfaces for disintegrating any central core left standing in the hole.
- the method comprising, providing a strip of bit stock having a cross-section corresponding to thatof the shank of the bit to be made, cutting 4 blanks from said stock of a length corresponding to that of one prong plus that of the shank, slitting the blank along its longitudinal central axis for a distance from one end corresponding to the length of a prong to provide two equisized parallel prong parts coextensive with the slit, said prong parts having free ends at said one end of the blank and having their opposite ends making root with a shank part beyond the slit, spreading the free ends of said prong parts apart until said prong parts are in substantially right-angular relationship with each other on the plane of said slit, and then turning the free ends of said prong parts oppositely across the plane of slitting so that the free end of each prong is
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Description
Jan. 27, 1953 E. J. HUCKSHOLD 2,626,533
MANUFACTURE BITS FOR MINING DRILLS Filed 001;. 12, 1949 INVENTOR'. ELMER J. HUCKS'HOLD Patented Jan. 27, 1953 2,626,533 MANUFACTURE (I)? BITS FOR MINING ILLS Elmer J. Huckshold, St. Louis, Mo., assignor to Central Mine Equipment Company, St. Louis, Mo., a corporation of Missouri Application October 12, 1949, Serial No. 120,998
This invention relates generally to mining drills, and bits therefor.
In United States patent to Stogsdill, No.
2372,6'12 and United States patent to Phipps, No. 2,341,237, there is disclosed a bit of generally Y-shape, adapted particularly for use in connection with augers in the mining of coal and other minerals. In such Stogsdill and Phipps patents, the Y-bit was formed from a long strip of stock, bent double to provide a shank from which the two arms of the Y extended in opposite directions. Experience in the field with bits of the character shown in said patents demionstrated that the shank portion of such a bit was inherently weak, apparently due to the stresses set up therein in deforming the same. The incidence of breakage of the shank portions of such bits was found to be too high for practical and commercial consideration. An effort to overcome the inherent weakness of such Y-bits is disclosed in the cQ-pending application of James M. Patterson, Serial No. 633,633, filed December 8, 1945. In said Patterson application, Y-shaped stampings were cut from a strip of stock, so that the shank portion of the bit was unitary. The arms of the Y-shaped stamping were then deformed and sharpened, so as to provide a bit of the same general configuration as 1 Claim. (Cl. 76-108) that shown by the aforesaid Stogsdill and Phipps patents. The bit of the Patterson application, while representing a substantial improvement over the previous art, was costly to manufacture because of the great waste of stock involved in stamping out the blanks, and as a bit was deficient in mining operations upon hard minerals because a cylindrical core arose between the prongs of the bit. and was not disintegrated at the bifurcation with the uniformity desirable in mining operations.
The object of the present invention, generally stated, is to provide a more economical process of manufacturing Y-bits, and toprovide a bit which will disintegrate the central core in a borehole without being subject to a high degree of breakage. Other objects will become apparent to those skilled in the art when the following description is read in connection with the accompanying drawings, in which:
Figure '1 is a'perspective view of the strip of bit stock from which the bits of the present invention are blanked;
Figure 2 is a perspective view of an individual blank, cut from the strip shown in Figure 1, and showing in dotted lines the manner in which the prongs of the Y are diverged from the blank;
2 Figures 3, 4, and 5 are, respectively, end, front, and side elevations of the blank after the first step of deformation, as shown in dotted lines in Figure 2; Figures 5, 6, and '7 are, respectively, end, front, and side elevations of the bit blank aftera further step of deformation; and
Figure 9 is a perspective view of the completed bit.
'The present invention contemplates the manufacture of Y-bits from a strip of bit stock whose cross-sectional dimension is the same as the cross-sectional dimension of the shank of the fill-1. ished Y-bit. After a blank is cut from such a strip of stock; it is centrally slit for part of its length, and the slit portions then spread apart to form a Y-shaped blank, the spreading being preferably in the plane of the slit. The prongs thus formed are then further deformed and sharpened to provide the desired cutting edges. As a result of the slitting operation and the initial spreading of the prongs in the plane of the slit, right angular cutting edges are provided at the b-ight between the prongs. which effectively disintegrate the central core in the borehole.
In the manufacture of bits in accordance with the present invention, a strip of steel stock I, whose cross-sectional dimension corresponds to that desired for the shank portion of the Y-bit to be manufactured, is provided and a succession of blanks 2 is stamped from the strip l. The blanks 2 have one end tapered, as shown at 3, and the opposite end rounded, as shown at 4. Concentric with the rounded end 4 is a hole 5. Accordingly, in stamping the blanks from the strip I, the only waste is represented by the two opposite chips 6 adiacent the tapered and rounded portions. and the core from hole 5.
The blank 2 is then slit lengthwise along line 1, shown in Figure 2, which is the longitudinal central axis of the bit. The slitting may be accomplished with a suitable shear. and terminates substantially short of the end of the blank wherein hole 5 is provided.
Having thus slit the blank, the portions thereof which are separated by the slit are bent in opposite directions, as shown in Figure 2, to form prongs 8 and 9. In thus bending the slit blank, it is preferable that the faces of the prongs 8 and 9, which were formed in the slitting operation, be maintained substantially parallel. After the prongs are thus bent, the blank is in the form shown in Figures 3, 4, and 5.
The Y-shaped blank is then further deformed by bending the prongs 8 and 9 about the longitudinal axis of the unslit, or shank, portion, i. e. athwart the direction in which the prongs 8 and 9 diverge from the unslit portion, as shown in Figures 6, 7, and 8. As shown, the direction of the latter bending is preferably such as to tend to close, rather than to further open, the slit 1, Thereafter the tips l8 and II of the arms 8 and 9 are sharpened by grinding, to provide cutting edges at the extremities of the prong, and at the face which was formed by the slitting operation. The completed bit is shown in Figure 9, and consists of the prongs 8 and 9, having tips l and l l the said prongs being integrally connected with the unitary shank l2, which latter is adapted to be received in the head of an auger.
From the foregoing description, those skilled in the art should readily understand the process of manufacturing the Y-bit in accordance with the present invention, and should realize that the edges I 3 and I4, formed by the slitting operation adjacent the bight, constitute cutting surfaces for disintegrating any central core left standing in the hole.
While one embodiment of the invention has been describedin detail, it is not to be understood that the invention is limited precisely thereto.
Having thus described the invention, what is claimed and desired to be secured by Le ters Patent is:
In the manufacture of V-shaped bits wherein two prongs diverge from their root with a shank of substantially rectangularcross-section to a distance substantially radially outward from said shank, the method comprising, providing a strip of bit stock having a cross-section corresponding to thatof the shank of the bit to be made, cutting 4 blanks from said stock of a length corresponding to that of one prong plus that of the shank, slitting the blank along its longitudinal central axis for a distance from one end corresponding to the length of a prong to provide two equisized parallel prong parts coextensive with the slit, said prong parts having free ends at said one end of the blank and having their opposite ends making root with a shank part beyond the slit, spreading the free ends of said prong parts apart until said prong parts are in substantially right-angular relationship with each other on the plane of said slit, and then turning the free ends of said prong parts oppositely across the plane of slitting so that the free end of each prong is on the opposite side of said plane from the root thereof.
ELMER J. HUCKSHOLD.
REFERENCES CITED The following references are of record in the file'of this patent:
UNITED STATES PATENTS Number
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US120998A US2626533A (en) | 1949-10-12 | 1949-10-12 | Manufacture of bits for mining drills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US120998A US2626533A (en) | 1949-10-12 | 1949-10-12 | Manufacture of bits for mining drills |
Publications (1)
Publication Number | Publication Date |
---|---|
US2626533A true US2626533A (en) | 1953-01-27 |
Family
ID=22393822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US120998A Expired - Lifetime US2626533A (en) | 1949-10-12 | 1949-10-12 | Manufacture of bits for mining drills |
Country Status (1)
Country | Link |
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US (1) | US2626533A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2831661A (en) * | 1953-08-26 | 1958-04-22 | Security Rock Bits Ltd | Rock drilling bits |
US2846902A (en) * | 1956-02-06 | 1958-08-12 | American Saw & Tool Company | Drill elements |
US2883888A (en) * | 1951-08-17 | 1959-04-28 | Arthur H Stewart | Boring tool and method for making same |
US4776241A (en) * | 1984-02-13 | 1988-10-11 | Bernard Pollington | Cutting tool |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US217182A (en) * | 1879-07-01 | Improvement in manufacture of rotary cutters for moldings | ||
US222970A (en) * | 1879-12-23 | Improvement in wood-molding machines | ||
US855108A (en) * | 1904-11-25 | 1907-05-28 | Charles C Lockhart | Mining-auger. |
US877892A (en) * | 1907-03-20 | 1908-01-28 | Gregory Jennings | Drill. |
US1323988A (en) * | 1919-12-02 | Composite drill and method of making same | ||
US1371137A (en) * | 1918-04-29 | 1921-03-08 | Henry J Albers | Miner's bit |
US1409258A (en) * | 1920-03-29 | 1922-03-14 | Willebald C Stenger | Carving tool |
US2003019A (en) * | 1930-09-16 | 1935-05-28 | Stoody Co | Method of protectively facing surfaces with abrasion resisting material |
US2297983A (en) * | 1939-03-09 | 1942-10-06 | Detachable Bit Company | Method of making detachable bits for rock drills |
US2341237A (en) * | 1943-07-28 | 1944-02-08 | Central Mine Equipment Co | Mining drill |
US2372612A (en) * | 1942-03-07 | 1945-03-27 | Central Mine Equipment Co | Mining drill and bit |
US2387983A (en) * | 1943-10-25 | 1945-10-30 | Ingersoll Rand Co | Manufacture of detachable drill bits |
-
1949
- 1949-10-12 US US120998A patent/US2626533A/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US217182A (en) * | 1879-07-01 | Improvement in manufacture of rotary cutters for moldings | ||
US222970A (en) * | 1879-12-23 | Improvement in wood-molding machines | ||
US1323988A (en) * | 1919-12-02 | Composite drill and method of making same | ||
US855108A (en) * | 1904-11-25 | 1907-05-28 | Charles C Lockhart | Mining-auger. |
US877892A (en) * | 1907-03-20 | 1908-01-28 | Gregory Jennings | Drill. |
US1371137A (en) * | 1918-04-29 | 1921-03-08 | Henry J Albers | Miner's bit |
US1409258A (en) * | 1920-03-29 | 1922-03-14 | Willebald C Stenger | Carving tool |
US2003019A (en) * | 1930-09-16 | 1935-05-28 | Stoody Co | Method of protectively facing surfaces with abrasion resisting material |
US2297983A (en) * | 1939-03-09 | 1942-10-06 | Detachable Bit Company | Method of making detachable bits for rock drills |
US2372612A (en) * | 1942-03-07 | 1945-03-27 | Central Mine Equipment Co | Mining drill and bit |
US2341237A (en) * | 1943-07-28 | 1944-02-08 | Central Mine Equipment Co | Mining drill |
US2387983A (en) * | 1943-10-25 | 1945-10-30 | Ingersoll Rand Co | Manufacture of detachable drill bits |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2883888A (en) * | 1951-08-17 | 1959-04-28 | Arthur H Stewart | Boring tool and method for making same |
US2831661A (en) * | 1953-08-26 | 1958-04-22 | Security Rock Bits Ltd | Rock drilling bits |
US2846902A (en) * | 1956-02-06 | 1958-08-12 | American Saw & Tool Company | Drill elements |
US4776241A (en) * | 1984-02-13 | 1988-10-11 | Bernard Pollington | Cutting tool |
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