GB1579999A - Annular metal cutting die of titanium carbide coating tool steel and method of shaving metal rods - Google Patents
Annular metal cutting die of titanium carbide coating tool steel and method of shaving metal rods Download PDFInfo
- Publication number
- GB1579999A GB1579999A GB20496/78A GB2049678A GB1579999A GB 1579999 A GB1579999 A GB 1579999A GB 20496/78 A GB20496/78 A GB 20496/78A GB 2049678 A GB2049678 A GB 2049678A GB 1579999 A GB1579999 A GB 1579999A
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- United Kingdom
- Prior art keywords
- annular
- annular cutting
- rod
- cutting blade
- die
- 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
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- 238000005520 cutting process Methods 0.000 title claims abstract description 143
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 31
- 239000002184 metal Substances 0.000 title claims abstract description 31
- 239000011248 coating agent Substances 0.000 title claims abstract description 28
- 238000000576 coating method Methods 0.000 title claims abstract description 28
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 23
- 229910001315 Tool steel Inorganic materials 0.000 title claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 20
- 229910000919 Air-hardening tool steel Inorganic materials 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000005058 metal casting Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910000822 Cold-work tool steel Inorganic materials 0.000 description 1
- 229910001263 D-2 tool steel Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
- B23D79/12—Machines or devices for peeling bars or tubes making use of cutting bits arranged around the workpiece, otherwise than by turning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The peeling tool (10) has a base part (14) and a head part (18). Passing through both is an inner passage (12). The metal bar to be machined is pulled through this inner passage (12) and is peeled at its circumferential surface on an annular cutting edge (24). The cutting edge (24) is formed by one outer and one inner tapered surface (20, 22) each of the head part (18). The tapered surfaces (20, 22) converge at the cutting edge (24). The cutting edge and the adjoining areas have a titanium carbide coating (34). The disposal of chips during the peeling is improved by bevels (26) made on the outer tapered surface (20). <IMAGE>
Description
(54) ANNULAR METAL CUTTING DIE OF TITANIUM CARBIDE
COATED TOOL STEEL, AND METHOD OF SHAVING METAL RODS
(71) We, GENERAL ELECTRIC COMPANY, a Corporation organized and existing under the laws of the State of New York, United
States of America, of 1 River Road,
Schenectady, State of New York, United
States of America, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to an annular cutting die for shaving metal rods or bar stock of the type disclosed in U. S. patent 2,233,928, issued March 4, 1941, and comprises an improvement in such annular cutting dies, and also an improved method of circumferentially shaving or cutting away the peripheral surface portions from metal rods or bar stock, and like cylindrical bodies.
Annular cutting dies of the type of which this invention relates are used to cut or shave away the peripheral surface portions from metal rods or bar stock thereby to provide such rods or bars with clean or "new" surfaces free of oxides or other contaminants and thus better prepare such materials for subsequent processing, such as in the manufacture of wire for electrical conductors as set forth in the aforesaid U. S. patent 2,233,928, or for the preparation'of core or seed rod for continuous metal casting operations such as disclosed in U. S. patent 3,060,054, and related U. S. patents.
In that this invention comprises improvements in the apparatus and method disclosed in the aforesaid United States patents, the disclosures of said U. S. patents 2,233,928 and 3,060,054 are expressly incorporated herein by reference.
Prior art annular cutting dies for this service, such as those shown in U. S. patent 2,233,928, have been frequently composed of a High Speed Tool Steel of the M Type, which is specifically designed for use in cutting tools. Such prior art annular cutting dies possess high strength and structural integrity, but they are subject to very rapid rates of wear on and about their cutting edges in this service. For instance, when cutting the surface from and around rods of substantially pure copper metal, the conventional prior art annular cutting dies of
Fagersta WKE4 Super High Speed Steel commonly are worn-out after an average service life of about 12 hours of continuous cutting service or operation.
In complex, continuous manufacturing procedures such as the continuous metal casting operation and system disclosed in
U. S. patent 3,060,054, and related U. S.
patents, wherein the continuous shaving away of the surface portion of a rod to continuously supply a core or seed rod for the continuous casting operation is an essential preliminary step, the repeated interruption of operations with downtime production losses and involved start-up procedures on an average of every 12 hours for replacement of the worn-out annular cutting die constitutes a very costly and significant shortcoming attributable to the prior art cutting dies.
According to the invention we provide an annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a metal rod passing therethrough, comprising an annular body of tool steel hardened to at least Rc 55 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade, and a coating of titanium carbide covering said annular cutting blade. The titanium carbide coated steel cutting dies of this invention are durable and lasting notwithstanding the extensive differences in the modulus of elasticity of the steel substrate and titanium carbide coating.
Also according to the invention we provide a method of circumferentially shaving away the peripheral surface portion of a metal rod, comprising providing an annular cutting die of a smaller circumference than the rod to be shaved, said cutting die comprising an annular body of tool steel hardened to at least Re 55 having an outer annular tapered
surface and an inner annular tapered surface which converge to form an annular cutting blade with a coating of titanium carbide thereon, and passing a metal rod through said die to circumferentially cut away the peripheral surface portion from around the metal rod passing therethrough.
The invention is particularly concerned with the continuous circumferential shaving away of the peripheral surface portion of copper-containing metal rods moving longitudinally through an annular cutting die for the preparation of core or seed rod for use in a continuous metal casting operation.
Additionally, the invention is also concerned with providing an annular cutting die for the circumferential cutting or shaving away of the peripheral surface portion of a metal rod continuously passing longitudinally therethrough which retains its high strength and structural and required dimensional stability thereby preserving its cutting edge or blade and resistance to wear while exposed to the high temperatures generated and incurred during prolonged, continuous cutting operations of up to 50 hours or more at speeds of faster than 275 feet per minute and cutting to depths of about 6 to 9 thousandths of an inch deep into the metal rod.
A constructional form of the invention is shown by way of example in the accompanying diagrammatical drawing which is a perspective view of a cutting die made in accordance with the invention.
Referring to the drawing, the annular cutting die member 10, comprises a generally hollow cylindrical or sleevelike body such as in the prior art embodiment illustrated in the above noted U. S. patents 2,233,928 and 3,060,054. The die member 10 is provided with an internal axial passage 12 extending lengthwise therethrough for the longitudinal movement of a rod or bar through the die member to thereby circumferentially impose the annular cutting blade of the die member 10 into the peripheral surface portion of the rod or bar as it moves longitudinally into and through the passage 12 of the die member 10.
Annular cutting die member 10, as is conventional, is preferably provided with a slightly tapered base portion 14 to facilitate its secure mounting and centering in a supporting base (not shown). The tapered base portion enables the die member 10 to be centrally wedged securely in a fixed position by means of the opposing direction of the force attributable to the mechanical effort applied to longitudinally advance a rod or bar through the annular cutting means comprising an annular blade having a knife edge of smaller diameter than the overall diameter of the rod or bar forced into and therethrough.
Additionally, the axial internal passage 12 extending through the die member 10 is appropriately tapered or flared outward away from the annular cutting to facilitate the unencumbered passage of the rod or bar longitudinally through the balance of the die member after the circumferential cutting or shaving away of the peripheral surface portion thereof by the annular cutting blade of the die member is effected.
In a preferred embodiment of the annular cutting die, the end of die member 10 containing the annular cutting blade, is formed with a reduced area or necked-down section such as is provided by a shoulder 16 and a head portion 18 of smaller diameter than the remainder of the die member body. This arrangement provides ample mass for great strength in the die member base 14, while also providing a reduced or minimal surface area for exposure to rubbing or abrading contact by the generally radial or lateral movement of the cut away portions or shavings from the rod or bar passing thereover in moving away from the cutting blade, to thereby minimize abrasion, wear and heat generated due to friction.
Head portion 18 of the annular cutting die member 10 is provided with an outer annular tapered surface 20, and an inner annular tapered surface 22 which converge upon each other at the one axial end to form an annular cutting blade 24 axially projecting from the head portion 18 of the die member 10 and providing a leading edge thereon. Annular cutting blade 24 is designed to be constructed of a suitably smaller circumference or diameter than the overall outer diameter of the rods or bars which are to be circumferentially cut or shaved whereby the longitudinal movement of such rods or bars centrally into and through the internal passage 12 of the die member in a direction counter to the leading edge with the axially projecting annular cutting blade 24 results in the peripheral surface portion of the rods or bars being circumferentially cut or shaved away progessively along the length thereof.
Also, in a preferred embodiment of the annular cutting die, the face of the outer annular tapered surface 20 of the die member 10 is provided with a plurality of facets 26 approximately equally or symmetrically spaced thereabout, and generally radially extending thereon from the annular blade 24.
Facets 26 can be formed in the face of the outer annular tapered surface 20 by machining or grinding the conical face or plane of solid annular tapered surface 20 to a substantially flat plane or concave contour, or of another distinctive contour differing from that of the conical face or plane of the outer annular tapered surface 20. The plurality of facets 26 should be provided in the outer annular tapered surface 20 of the annular cutting blade 24 with each of said facets having both of its borders 28 adjoining the border 28 of another facet at a location adjacent to the annular cutting blade 24. Thus, the adjoining borders 28 of the facets 26 on the face of the outer annular tapered surface 20 adjacent to the annular cutting blade 24 provide a multiplicity of cutting or splitting wedge-like edges 30, substantially equally spaced about the annular cutting blade 24 and projecting therefrom in a generally radial direction on the face of the outer annular tapered surface 20.
The cutting or splitting edges 30 spaced about the annular cutting blade 24 split or divide the circumferentially cut or shaved away peripheral surface portion of the rod or bar moving longitudinally therethrough, into a plurality of lengthwise sections or shavings, and thereby enabling the surface portion which has been circumferentially cut away from the bar or rod to be disposed of in a laterel or radial movement as a plurality of separated individual continuous strips or sections.
In accordance with the improvements of this invention, the annular cutting die member 10 comprises a composite construction of a foundation or substructure body 32 of air hardening tool steel having a coating layer of titanium carbide 34 (illustrated as the darkened portion) covering the annular cutting blade 24 thereof and the portions adjacent thereto such as inner annular tapered surface 22, and the like surfaces or areas which may be exposed to moving contact with the material being cut or shaved.
Foundation or substructure body 32 is provided in the preferred configuration as described above and illustrated in the drawing, or in other apt form or shape, and consists of an air hardening AISI tool steel such as D2, D7 or A7 types of tool steel, also referred to as air-hardening cold work tool steel and high-carbon high-chromium cold work steels.
The steel body should be hardened or austenitized after coating by heating up to at least approximately 1010"C (1850OF) and air cooled, with the attainment of a hardness of at least 55 Rockwell C, and preferably a hardness of 58 to 63 Rockwell C, for optimum performance.
The titanium carbide superimposed coating 34 on the substructure body 32, or critical surface portions thereof, is formed thereon in situ by vapor deposition in accordance with known and commercially available prior art technology. In general, the substructure body 32 or a portion thereof is exposed to vaporized titanium and carbon in an environment of about 982"C to about 1032"C (about 1800 to about 19000F) for a period of approximately 2 hours, or until a layer or coating from 0.0002 to 0.0004 inches thick, or other suitable or desired thickness has been deposited thereon. If the coating film or layer is rough or if otherwise apt, the coating can be polished to reduce the roughness or peaks and smooth the same.
In that the titanuim carbide vapor deposition temperatures of about 982 -- 1050"C approximates or encompasses the hardening or austenitizing conditions of about 1010"C, the steel hardening treatment can be combined with the vapor deposition process by simply depositing the titanium carbide on the steel body or surface portions thereof in an unhardened state whereupon the steel is aptly heated to an appropriate temperature level, and thereafter pre mitred to cool faster than its critical cooling rate in an inert atmosphere.
To evaluate and demonstrate the relative effectiveness of the new and improved composite annular cutting die of this invention in terms of longevity of satisfactory performance, a number of annular cutting dies of the composite structure and composition of this invention were tested as replacements for prior art dies under identical conditions in circumferentially cutting away the peripheral surface portion of copper rod in a continuous casting production operation of the type disclosed in U. S. patent 3,060,054, and related U. S.
patents.
The annular cutting die samples used as examples of this invention consisted of a foundation or substructure body 32 of AISI
D2 tool steel having the composition, in percent by weight, of approximately: carbon - 1.55; chromium - 11.50; molybdenum -- 0.80; vanadium - 0.90; and the balance iron. A vapor deposited coating of about 0.0003 inch was formed on the annular cutting blade 24, the outer annular tapered surface 20 and facets 26, and the inner annular tapered surface 22 at a temperature of approximately 1010"C (1850OF) over a period of about 2 hours. The thus coated and heated dies were then air cooled and then hardened to a hardness of approximately 60 Rockwell C, i.e. within the range 58 62.
The prior art annular cutting die samples of identical configuration and dimensions as the examples of the invention used as standards for the test consisted of Fagersta
WKE-4 Super Hiqh Speed Steel, an alloy similar to M42 High Speed Tool Steel, and having the composition, in percent by weight, of approximately: carbon - 1.25; chromium - 4.0; molybdenum - 3.5; vanadium 3.5; cobalt -- 9.0; tungsten -- 9.0; and the balance iron. The standard dies were hardened to Rc 58 to 65.
Test die samples, both examples of this invention and prior art standards, were produced with the annular cutting blade 24 having an opening diameter of 0.377 to 0.282 inches, and any die sample was considered to be spent when the wear on the annular cutting blade increased the drag on the rod being pulled therethrough up to the rated current capacity of the electric drive motor pulling the rod through the annular cutting die, whereupon the term of the test run for the die sample was ended and the time of its service measured.
Operating under identical conditions, and in accordance with the above-described criterion, 66 standard annular cutting die samples of the prior art composition served for an average of 11.73 hours while casting copper at a rate of 5.85 tons per hour before becoming spent due to wear, whereas 39 annular cutting die samples of this invention served an average of 50.8 hours while casting copper at a higher rate of 6.14 tons per hour before becoming spent due to wear.
Thus, the annular cutting dies of this invention provided an improvement of about 4 to 5 times longer performance life over the prior art annular cutting dies, thereby eliminating 4 or 5 costly and complex production terminations, down-time, and start-ups required for the replacement of worn out cutting dies.
WHAT WE CLAIM IS:- 1. An annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a metal rod passing therethrough, comprising an annular body of tool steel hardened to at least Rc 55 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade, and a coating of titanium carbide covering said annular cutting blade.
2. The annular cutting die of claim 1, wherein the coating of titanium carbide covering said annular cutting blade is at least 0.0002 inch thick.
3. The annular cutting die of claim 1, wherein the annular body of tool steel is air hardened to Re 58 to Re 62.
4. The annular cutting die of claim 1, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annular tapered surface.
5. An annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a coppercontaining rod passing therethrough, comprising an annular body of an air hardening tool steel hardened to Re 58 to Re 62 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade, and a vapor deposited coating of titanuim carbide of at least 0.0002 inch thick covering said annular cutting blade.
6. The annular cutting die of claim 5, wherein the vapor deposited coating of titanium carbide covering said annular cutting blade is 0.0002 inch to 0.0004 inch thick.
7. The annular cutting die of claim 5, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annular tapered surface.
8. An annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a copper rod passing therethrough, comprising an annular body of an air hardening tool steel hardened to approximately Re 60 having an outer annular tapered surface with a plurality of symmetrical, radially extending facets formed therein and an inner annular tapered surface which converge to form an annular cutting blade, and a vapor deposited coating of titanium carbide of 0.0002 inch to 0.0004 inch thick covering said annular cutting blade.
9. The annular cutting die of claim 8, wherein the air hardening tool steel hardened to approximately Re 60 is a tool steel selected from those of the AISI designation D-2, D-7 and A-7.
10. A method of circumferentially shaving away the peripheral surface portion of a metal rod, comprising providing an annular cutting die of a smaller circumference than the rod to be shaved, said cutting die comprising an annular body of tool steel hardened to at least Re 55 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade with a coating of titanuim carbide thereon, and passing a metal rod through said die to circumferentially cut away the peripheral surface portion from around the metal rod passing therethrough.
11. The method of circumferentially shaving away the peripheral surface portion of a metal rod of claim 10, wherein the coating of titanium carbide covering said annular cutting blade is at least 0.0002 inch thick.
12. The method of circumferentially shaving away the peripheral surface portion of a metal rod of claim 10, wherein the annular body of tool steel is air hardened to Re 58 to Re 62.
13. The method of circumferentially shaving away the peripheral surface portion of a metal rod of claim 10, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annalar tapered surface.
14. A method of circumferentially
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (21)
1. An annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a metal rod passing therethrough, comprising an annular body of tool steel hardened to at least Rc 55 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade, and a coating of titanium carbide covering said annular cutting blade.
2. The annular cutting die of claim 1, wherein the coating of titanium carbide covering said annular cutting blade is at least 0.0002 inch thick.
3. The annular cutting die of claim 1, wherein the annular body of tool steel is air hardened to Re 58 to Re 62.
4. The annular cutting die of claim 1, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annular tapered surface.
5. An annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a coppercontaining rod passing therethrough, comprising an annular body of an air hardening tool steel hardened to Re 58 to Re 62 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade, and a vapor deposited coating of titanuim carbide of at least 0.0002 inch thick covering said annular cutting blade.
6. The annular cutting die of claim 5, wherein the vapor deposited coating of titanium carbide covering said annular cutting blade is 0.0002 inch to 0.0004 inch thick.
7. The annular cutting die of claim 5, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annular tapered surface.
8. An annular cutting die of improved cutting life for the circumferential shaving away of the surface portion of a copper rod passing therethrough, comprising an annular body of an air hardening tool steel hardened to approximately Re 60 having an outer annular tapered surface with a plurality of symmetrical, radially extending facets formed therein and an inner annular tapered surface which converge to form an annular cutting blade, and a vapor deposited coating of titanium carbide of 0.0002 inch to 0.0004 inch thick covering said annular cutting blade.
9. The annular cutting die of claim 8, wherein the air hardening tool steel hardened to approximately Re 60 is a tool steel selected from those of the AISI designation D-2, D-7 and A-7.
10. A method of circumferentially shaving away the peripheral surface portion of a metal rod, comprising providing an annular cutting die of a smaller circumference than the rod to be shaved, said cutting die comprising an annular body of tool steel hardened to at least Re 55 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade with a coating of titanuim carbide thereon, and passing a metal rod through said die to circumferentially cut away the peripheral surface portion from around the metal rod passing therethrough.
11. The method of circumferentially shaving away the peripheral surface portion of a metal rod of claim 10, wherein the coating of titanium carbide covering said annular cutting blade is at least 0.0002 inch thick.
12. The method of circumferentially shaving away the peripheral surface portion of a metal rod of claim 10, wherein the annular body of tool steel is air hardened to Re 58 to Re 62.
13. The method of circumferentially shaving away the peripheral surface portion of a metal rod of claim 10, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annalar tapered surface.
14. A method of circumferentially
shaving away the peripheral surface portion of a copper-containing rod, comprising providing an annular cutting die of a smaller circumference than the rod to be shaved, said cutting die comprising an annular body of an air hardening tool steel hardened to Re 58 to Re 62 having an outer annular tapered surface and an inner annular tapered surface which converge to form an annular cutting blade with a vapor deposited coating of titanium carbide of at least 0.0002 inch thick thereon, and passing a copper-containing rod longitudinally through said die to circumferentially cut away the peripheral surface portion from around the coppercontaining rod passing therethrough.
15. The method of circumferentially shaving away the peripheral surface portion of a copper-containing rod of claim 14, wherein the vapor deposited coating of titanuim carbide covering said annular cutting blade is 0.0002 inch to 0.0004 inch thick.
16. The method of circumferentially shaving away the peripheral surface portion of a copper-containing rod of claim 14, wherein the annular cutting blade is provided with a plurality of symmetrical, radially extending facets formed in the outer annular tapered surface.
17. A method of circumferentially shaving away the peripheral surface portion of a copper rod, comprising providing an annular cutting die of a smaller circumference than the copper rod to be shaved, said cutting die comprising an annular body of an air hardening tool steel hardened to approximately Re 60 having an outer annular tapered surface with a plurality of symmetrical, radially extending facets formed therein and an inner annular tapered surface which converge to form an annular cutting blade with a vapor deposited coating of titanium carbide of 0.0002 inch to 0.0004 inch thick thereon, and passing a copper rod longitudinally through said die to circumferentially cut away the peripheral surface portion from around the copper rod passing therethrough.
18. The method of circumferentially shaving away the peripheral surface portion of a copper rod of claim 17, wherein the air hardening tool steel hardened to approximately Re 60 is a tool steel selected from those of the AISI designation D-2, D-7 and A-7.
19. The method of circumferentially shaving away the peripheral surface portion of a copper rod of claim 17, wherein the copper rod is passed through said annular cutting die at a linear rate of at least 275 feet per minute.
20. An annular cutting die substantially as illustrated in the accompanying drawing.
21. A method of circumferentially shaving away the peripheral surface portion of a metal rod substantially as described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83208777A | 1977-09-12 | 1977-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1579999A true GB1579999A (en) | 1980-11-26 |
Family
ID=25260649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20496/78A Expired GB1579999A (en) | 1977-09-12 | 1978-05-18 | Annular metal cutting die of titanium carbide coating tool steel and method of shaving metal rods |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5455886A (en) |
| AU (1) | AU3910578A (en) |
| BR (1) | BR7805380A (en) |
| CH (1) | CH636786A5 (en) |
| DE (1) | DE2827548A1 (en) |
| ES (1) | ES473213A1 (en) |
| FR (1) | FR2402508A1 (en) |
| GB (1) | GB1579999A (en) |
| HU (1) | HU179187B (en) |
| IN (1) | IN150082B (en) |
| MX (1) | MX150631A (en) |
| SE (1) | SE7809548L (en) |
| YU (1) | YU204378A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2247693A (en) * | 1990-08-23 | 1992-03-11 | Kabelmetal Electro Gmbh | Peeling tool process involving machining prior to coating |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3160281A1 (en) | 2024-03-13 | 2025-09-19 | Nidec Psa Emotors | Device and method for protection during the discharge of a capacitor |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1065442B (en) * | 1959-09-17 | Metallgesellschaft Aktiengesellschaft, Frankfurt/M | Process for hardening workpieces and tools made of steel with coatings of titanium carbide or nitride | |
| US3093897A (en) * | 1963-06-18 | Metallurgy | ||
| US2233928A (en) * | 1939-02-16 | 1941-03-04 | Gen Electric | Wire shaving process and fixture |
| GB679254A (en) * | 1950-06-23 | 1952-09-17 | British Thomson Houston Co Ltd | Improvements in and relating to dies for planing metal wires |
| DE960449C (en) * | 1952-08-01 | 1957-03-21 | Siemens Ag | Device on metal extrusion presses for peeling off the oxide skin |
| DE1056449B (en) * | 1954-03-12 | 1959-04-30 | Metallgesellschaft Ag | Process for the production of coatings from hard carbides |
| US3055102A (en) * | 1956-10-11 | 1962-09-25 | Lasalle Steel Co | Metal finishing means and method for use of same |
| GB908061A (en) * | 1957-10-22 | 1962-10-17 | Lasalle Steel Co | An improved method of processing metal bars |
| US3058197A (en) * | 1960-06-14 | 1962-10-16 | Westinghouse Electric Corp | Die shaving wrought copper and its alloys |
| US3060054A (en) * | 1960-09-12 | 1962-10-23 | Gen Electric | Method and apparatus for accreting molten material on a moving member |
| US3557588A (en) * | 1968-04-18 | 1971-01-26 | Crucible Inc | Method and apparatus for shaving wire |
| DE1924639B2 (en) * | 1969-05-14 | 1976-10-07 | Metallgesellschaft Ag, 6000 Frankfurt | PROCESS FOR MANUFACTURING COATINGS FROM TITANIUM CARBIDE |
| US3791852A (en) * | 1972-06-16 | 1974-02-12 | Univ California | High rate deposition of carbides by activated reactive evaporation |
| US3900592A (en) * | 1973-07-25 | 1975-08-19 | Airco Inc | Method for coating a substrate to provide a titanium or zirconium nitride or carbide deposit having a hardness gradient which increases outwardly from the substrate |
| DE2400591A1 (en) * | 1974-01-07 | 1975-07-17 | Kabel Metallwerke Ghh | Pipe wall thickness control device - incorporate concentric mandrel spindle, inserted into pipe end |
| AT328254B (en) * | 1974-06-25 | 1976-03-10 | Plansee Metallwerk | HOBBING CUTTERS |
| CH601100A5 (en) * | 1974-08-05 | 1978-06-30 | Hoffmann La Roche | |
| JPS5123458A (en) * | 1974-08-14 | 1976-02-25 | Hitachi Ltd | REIKANATSUEN SETSUBI |
| JPS5124982A (en) * | 1974-08-24 | 1976-02-28 | Tdk Electronics Co Ltd | Dengensochino anteikakairo |
| CH590338A5 (en) * | 1975-03-14 | 1977-08-15 | Battelle Memorial Institute | |
| BR7604418A (en) * | 1975-07-09 | 1978-01-31 | Teledyne Ind | MATERIAL COMPOSITION AND PROCESS FOR ITS FORMATION |
| US4076441A (en) * | 1976-09-27 | 1978-02-28 | General Electric Company | Annular cutting die, and method of circumferentially shaving away the surface portion of a rod |
-
1978
- 1978-05-18 GB GB20496/78A patent/GB1579999A/en not_active Expired
- 1978-06-23 DE DE19782827548 patent/DE2827548A1/en active Granted
- 1978-06-28 IN IN716/CAL/78A patent/IN150082B/en unknown
- 1978-07-12 HU HU78GE1037A patent/HU179187B/en unknown
- 1978-08-07 CH CH839278A patent/CH636786A5/en not_active IP Right Cessation
- 1978-08-18 BR BR7805380A patent/BR7805380A/en unknown
- 1978-08-21 AU AU39105/78A patent/AU3910578A/en active Pending
- 1978-08-29 YU YU02043/78A patent/YU204378A/en unknown
- 1978-09-08 ES ES473213A patent/ES473213A1/en not_active Expired
- 1978-09-11 SE SE7809548A patent/SE7809548L/en unknown
- 1978-09-12 FR FR7826066A patent/FR2402508A1/en not_active Withdrawn
- 1978-09-12 JP JP11136678A patent/JPS5455886A/en active Pending
- 1978-09-12 MX MX174856A patent/MX150631A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2247693A (en) * | 1990-08-23 | 1992-03-11 | Kabelmetal Electro Gmbh | Peeling tool process involving machining prior to coating |
Also Published As
| Publication number | Publication date |
|---|---|
| IN150082B (en) | 1982-07-17 |
| FR2402508A1 (en) | 1979-04-06 |
| SE7809548L (en) | 1979-03-13 |
| BR7805380A (en) | 1979-05-02 |
| CH636786A5 (en) | 1983-06-30 |
| DE2827548C2 (en) | 1987-09-03 |
| YU204378A (en) | 1983-01-21 |
| ES473213A1 (en) | 1979-10-16 |
| AU3910578A (en) | 1980-03-20 |
| JPS5455886A (en) | 1979-05-04 |
| HU179187B (en) | 1982-09-28 |
| DE2827548A1 (en) | 1979-03-22 |
| MX150631A (en) | 1984-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |