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1. 发明专利

DE1752125A1 未知
公开(公告)号：DE1752125A1
公开(公告)日：1971-09-30
申请号：DE1752125
申请日：1968-04-05
申请人： CLEVELAND TWIST DRILL CO
发明人： WALTER BROCKMAN ROBERT
IPC分类号： B23Q1/00 , F16L27/087

2. 发明专利

GB936871A Improvements in or relating to the electrolytic machining of metals 未知
公开(公告)号：GB936871A
公开(公告)日：1963-09-18
申请号：GB1978260
申请日：1960-06-03
申请人： CLEVELAND TWIST DRILL CO
发明人： FAUST CHARLES LAWSON , CLIFFORD JOHN EDWARD
IPC分类号： B23H3/08
摘要： 936,871. Electro-machining metals. CLEVELAND TWIST DRILL CO. June 3, 1960, No. 19782/60. Class 41. Bodies of cemented metal carbides are electro-machined using as electrolyte an aqueous solution containing free hydroxy] ions and a dissolving agent for the cementing material and consisting of a saturated polybasic organic acid, an ammonium halide, or an organic amine. In examples, the following compounds are added to an alkali hydroxide solution, sodium oxalate, citrate, tartrate, or gluconate; tri-ethanolamine, tetrasodium ethylene diamine tetraacetate, ethylene diamine, ammonium chloride, bromide or iodide, and combinations of these. Tungsten carbide cemented with cobalt and silver soldered to steel, and similar metal bodies may be shaped, and sharpened to form tools by applying the electrolyte in an apparatus as described in Specification 854,541. Where silver solder is present, e.g. in a workpiece of a cemented carbide, steel and silver solder, the electrolyte preferably includes a cyanide or an amine, which will then also dissolve other impurities present, e.g. tungsten and cobalt oxides, and compounds of Ag, Cu, Zn, Cd, Fe, and nickel. A range of electrolyte compositions are described for cemented metal carbides, and may include other alkali metal salts e.g. Na 2 CO 3 , NaCl, and KF.

3. 发明专利

GB467895A Improvements in or relating to alloy steels 未知
公开(公告)号：GB467895A
公开(公告)日：1937-06-18
申请号：GB3514935
申请日：1935-12-18
申请人： CLEVELAND TWIST DRILL CO
摘要： An iron alloy for tools and other purposes contains 0,15-1,6 per cent of carbon, 3,25-6 per cent of chromium, 8-20 per cent of tungsten, 1-5,6 per cent of molybdenum and up to 3 per cent of silicon, with or without up to 6 per cent of vanadium and up to 16 per cent of cobalt, and with or without small amounts of the following elements as impurities: manganese, nickel, titanium, tantalum, uranium, copper, aluminium, sulphur, phosphorus, arsenic, and tin. The molybdenum content is 12,5-28 per cent of the tungsten content. Heat treatments for hardening, tempering, carburizing, and nitrogenizing may be applied, and the tempering and nitrogenizing operations may be carried out simultaneously. Specification 411,321 is referred to.

4. 发明专利

FR799561A 未知
公开(公告)号：FR799561A
公开(公告)日：1936-06-15
申请号：FR799561D
申请日：1935-12-18
申请人： CLEVELAND TWIST DRILL CO

5. 发明专利

GB411321A Improvements in or relating to molybdenum steels 未知
公开(公告)号：GB411321A
公开(公告)日：1934-06-07
申请号：GB2237233
申请日：1933-08-10
申请人： CLEVELAND TWIST DRILL CO
摘要： Steel alloys, particularly for tools, contain 0,6-15 per cent of molybdenum, and tungsten in amount between 10 and 40 per cent of the proportion of molybdenum, the minimum tungsten being 0,2 per cent. When the molybdenum is below 6 per cent, the silicon is below 0,45 per cent, which is also the preferable maximum of silicon for higher molybdenum contents. The alloys may contain 0,5-1,3 per cent of carbon, 0,1-1 per cent of manganese, 0,2-5 per cent of chromium, 0,2-4 per cent of tungsten, 0,1-1,5 per cent of vanadium, 0,6-10 per cent of molybdenum, and minor amounts of cobalt, nickel, tantalum, and uranium. Particular alloys may be hardened at 2000-2235 DEG F. and tempered at 940-1150 DEG F.

6. 发明专利

GB984614A Improvements in extrusion die 未知
公开(公告)号：GB984614A
公开(公告)日：1965-02-24
申请号：GB196964
申请日：1964-01-16
申请人： CLEVELAND TWIST DRILL CO
IPC分类号： B21C23/14 , B21C25/02 , B21K5/02
摘要： 984,614. Extruding; making twist drills. CLEVELAND TWIST DRILL CO. Jan. 16, 1964 [Jan. 21, 1963], No. 1969/64. Headings B3A and B3P. An extrusion die 5, particularly for forming twist drills, has a generally cylindrical bore 5a, with a smoothly contoured entrance 15 and at least one helical land 13 having along one side an axial relief 20. For forming twist drills from heated billets 10 of cast high speed tool steel, the die has two opposite lands 13, 14, Fig. 3 (not shown) whose entrance edges are relieved at 16-19, Fig. 3 (not shown). Die 5 is preferably made of molybdenum-tungsten high speed steel or sintered metal carbides and is mounted in a die holder 4 located in a housing 3 which also receives the billet container 6 whose conical end 9 is engaged by a cap 7. Extrusion pressure is applied by a ram 12 acting through a dummy block 11 of friable material such as compressed carbon, molybdenum disulphide or glass which ensures complete extrusion.

7. 发明专利

DE1127174B 未知
公开(公告)号：DE1127174B
公开(公告)日：1962-04-05
申请号：DEC0018485
申请日：1959-02-26
申请人： CLEVELAND TWIST DRILL CO
发明人： WAGNER WILLIAM ALLAN
IPC分类号： B23B51/04
摘要： 852,711. Drills; making drills. CLEVELAND TWIST DRILL CO. Jan. 28, 1959 [Aug. 25, 1958], No. 3068/59. Classes 83 (2) and 83 (3). In a drill produced from a thin-walled tube 13, the straight or helical flutes 2, 3 are formed by crimping, swaging, &c. and a tip 20 is inserted in a slot 17 and brazed on to the drill. The tip is supported by faces 18, 19, 18a, 19a and coolant is supplied to the tip through apertures 9, 11. Wear-strips 22, 23 may be brazed on to the drill.

8. 发明专利

CA385208A FERROUS ALLOY 未知
公开(公告)号：CA385208A
公开(公告)日：1939-11-21
申请号：CA385208D
申请人： CLEVELAND TWIST DRILL CO
发明人： EMMONS JOSEPH VICTOR

9. 发明专利

CA364032A FERROUS ALLOY 未知
公开(公告)号：CA364032A
公开(公告)日：1937-02-09
申请号：CA364032D
申请人： CLEVELAND TWIST DRILL CO
发明人： EMMONS JOSEPH V

10. 发明专利

FR800098A 未知
公开(公告)号：FR800098A
公开(公告)日：1936-06-26
申请号：FR800098D
申请日：1935-12-28
申请人： CLEVELAND TWIST DRILL CO
IPC分类号： C22C38/12 , C22C38/22

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