| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Method of manufacturing mechanical parts from metal scrap | US911221 | 1978-05-31 | US4272877A | 1981-06-16 | Keizo Takeuchi; Yoshio Iwai; Tadashi Yamanaka; Tatsuo Miura |
| A method of manufacturing mechanical parts from the raw material of metal scrap such as shavings and turnings of castings and steel and press chips of steel, includes the steps of: preparing the metal scrap including shavings and turnings; forming a billet by pressing metal scrap; heating the billet to the forging temperature, whereby a satisfactory plasticity is given to the billet for plastic deformation of metal scrap in the succeeding process; and forming the heated billet into a forged workpiece by use of a semi-closed forging die. The shape of the billet is determined such that, in this forging step, the respective portions of the billet are subjected to plastic deformation having a given plastic deformation rate, whereby material flow sufficient to generate metallic bond at the respective portions is caused, and burred portions are formed on portions of the forged workpiece mainly subjected to extrusion press during die-forging. | ||||||
| 142 | Method and apparatus for drying and preheating small metallic particles | US766489 | 1977-02-07 | US4133635A | 1979-01-09 | John R. Fellnor; William J. Love, Jr. |
| A system for drying and preheating small metallic particles such as chips, turnings, borings and the like to remove volatiles therefrom which includes a dryer working in conjunction with a briquetting press. The dryer includes a drying and preliminary combustion chamber including a revolving drum therein through which the chips pass. The drying and preliminary combustion is heated and is atmospherically sealed and operated with a reducing atmosphere. The volatiles driven from the metallic particles are passed to a combustion completion chamber which is maintained at a temperature sufficient to burn the combustibles and into which air is injected to complete the combustion. The hot metallic particles are thermally insulated and sealed from the atmosphere while being conveyed from the drying and preliminary combustion chamber to the briquetting press where they are compressed into briquettes for subsequent introduction into induction furnaces and the like. | ||||||
| 143 | Method for improving the sinterability of iron powder derived from comminuted scrap metal | US735468 | 1976-10-26 | US4129443A | 1978-12-12 | Sydney M. Kaufman |
| Methods are disclosed for embrittling scrap metal for comminution and for subsequent or simultaneous treatment of the comminuted metal powder to improve sintering kinetics and prevent oxidation of alloying ingredients. A first embrittling method impacts the scrap metal at a temperature below its ductile-brittle transition temperature to cryogenically provide scrap metal powder. The scrap metal is subjected to two impacting operations (such as by use of a ball milling machine), the first operation being carried out simultaneously with the cryogenic medium and the second impacting operation is carried out at ambient temperature conditions utilizing milling elements which impart cold work to at least a portion of the cryogenic powder. An anti-oxidation agent, such as copper or iron, is mechanically transferred to substantially each particle of said cryogenic powder during the second operation to form a continuous copper or iron envelope thereabout. The coated cryogenic powder is then compacted and sintered; the sintered product may be subjected to hardening or tempering treatments if desired. Also disclosed is a continuous method for carrying out both cryogenic embrittlement impaction, and coating. A mass of liquid N.sub.2 and metal pieces are circulated in a properly oriented tube so that in one zone a true slurry exists with liquid N.sub.2 in intimate contact with the metal pieces; in another zone the metal pieces are withdrawn from the slurry to momentarily increase in temperature. Fragmenting occurs substantially in said one zone and cold-working substantially in said another zone, while progressive anti-oxidation coating of the comminuted particles occurs in both zones.A second embrittling method involves dissolving the carbon in ferrous scrap metal having a critical predetermined carbon content, quenching the metal to produce substantially all martensite, and impacting the treated metal while simultaneously coating with an anti-oxidizing agent. | ||||||
| 144 | Apparatus for manufacturing extruded structural profiles from aluminum based metal scraps | US801910 | 1977-05-31 | US4117703A | 1978-10-03 | Toshiro Takahashi; Toshihiro Nagano; Shozo Iguchi; Masaru Kikuchi; Katsuhiko Nakamura; Atsushi Mochizuki |
| Aluminum or aluminum alloy scraps or wastes are broken into chips and extruded under a high temperature to produce extruded structural profiles. The method is characterized by the fact that the interior of the extruder is evacuated prior to or simultaneously with the extrusion step so as to exhaust air entrapped in the body of the chips. There is also disclosed apparatus suitable for performing the method. | ||||||
| 145 | Method for improving the sinterability of cryogenically-produced iron powder | US703881 | 1976-07-09 | US4090874A | 1978-05-23 | Sydney M. Kaufman |
| A method is disclosed of making sintered parts with cryogenically-produced powder derived from scrap metal, such as machine turnings. The scrap metal is subjected to two impacting operations (such as by use of a ball milling machine). The first operation is carried out with the use of a refrigerating agent (to lower the temperature of the scrap metal below its ductile-brittle transition temperature) thereby resulting in comminution of the scrap to a cryogenic powder. The second impacting operation is carried out at ambient temperature conditions utilizing milling elements which impart cold work to at least a portion of the cryogenic powder; simultaneously, copper is mechanically transferred to substantially each particle of said cryogenic powder to form a continuous copper envelope thereabout. The coated cryogenic powder is then compacted and sintered; the sintered product may be subjected to hardening or tempering treatments if desired. | ||||||
| 146 | Process for producing dense machinable alloys from particulate scrap | US667521 | 1976-03-16 | US4077108A | 1978-03-07 | Guy Mathern; Jean Lefevre; Roland Tricot; Andre Guessier |
| The invention relates to a process for obtaining steels having improved machinability. This process provides for the upgrading of divided metallurgical products, which are consolidated without fusion, with incorporation of a dispersed phase.This process is used in particular for scrap consisting of sheet metal or turnings, which is mixed in the desired proportion with an additive such as for example sulfur or lead. After it has been compressed the mixture is extruded in a press in the form of bars and the like.This process is particularly suitable for producing stainless steels containing sulfur or lead. The lead stainless steels thus prepared have an excellent corrosion resistance, in addition to their machinability characteristics. | ||||||
| 147 | Process for converting aluminum scrap into useful products | US701578 | 1976-07-01 | US4059896A | 1977-11-29 | Akira Asari; Kenzou Tatsuno |
| A process for converting aluminum scrap into finished articles by compaction, heating and extrusion. The process comprises the steps of compacting the aluminum scrap at ambient temperature into a billet having a density between 1.8 and 2.4 g/cm.sup.3, heating the compacted billet to a temperature between 350.degree. and 550.degree. C, compacting the heated billet into a dense mass having a density about 2.4 g/cm.sup.3 either in an extrusion container, while maintaining conditions under which the air pressure at the outer periphery of the billet is lower than that in the central portion of the billet, or externally of the extrusion container, and subsequently, after completion of the second compaction, consolidating the secondly compacted billet by extrusion through an extrusion die fitted to the container while maintaining the above mentioned conditions, whereby void-free and scab-free finished articles of good quality are efficiently produced with a small apparatus using little energy. | ||||||
| 148 | Novel apparatus and solid state method for converting small pieces of metal to a workpiece | US379781 | 1973-07-16 | US3943617A | 1976-03-16 | Mark E. Whalen; Norman W. Trepanier; Robert A. Kraus; Joseph W. Malleck |
| A method of converting scrap or other small pieces of metal into a useful, commercial product while maintaining the metal in a solid state. According to the process, the pieces are maintained together for further processing. They are impacted, while heated, to produce a metal body and thereafter subjected to continued impaction so that the pieces forming the body are welded together into a cohesive, homogeneous slab. There is also disclosure of a novel press and method of operating the press. The press is of the harmonic type. Its novel aspects include control of movement of novel platens during rotation of shafts which drive the platens and perimetral constraint of a workpiece being forged to achieve rapid impaction and self feed of a workpiece.There is also disclosure of a novel method for making flakes of steel, a novel furnace including seals for maintaining the furnace gas-tight, a novel method in which the pieces of metal are scrap steel and baled together into a bale in which the scrap pieces of random size and shape become intertwined together and novel processes and apparatus for cleaning scrap or other metal pieces. | ||||||
| 149 | Solid state method for converting small pieces of steel to a workpiece | US16478971 | 1971-07-21 | US3802932A | 1974-04-09 | WHALEN M; MALLECK J |
| A method is disclosed for converting scrap or other small pieces of steel into a useful, commercial product while maintaining the steel in a solid state. According to the process, pieces of scrap steel are baled together into a bale in which the scrap pieces of random size and shape become intertwined together. The bales are heated in a reducing atmosphere so that carbon migrates from the scrap steel. The heated bales are impacted, while heated, to produce a steel body which is thereafter subjected to continued impaction so that the pieces forming the body are welded together into cohesive, homogeneous slab of low carbon steel.
|
||||||
| 150 | Method of repetitively impacting small pieces of metal in order to produce a densified continuous body | US3783494D | 1971-07-21 | US3783494A | 1974-01-08 | WHALEN M; MALLECK J |
| A method and apparatus for forming metal products from scrap or other small pieces. Pieces of scrap metal are bonded together by baling into bales of from 20 percent to 50 percent metal by volume. The bales are then heated from 1,200*F. to 2,350*F. and fed through a feed magazine into a harmonic impacting press. Deformation of bales prior to reaching the impacting station in the harmonic press is controlled by control of the press and by peripheral confinement of the bales prior to being fed into the impacting station in the press. There is also a disclosure of a means to fuse bales together through use of a thermal powder.
|
||||||
| 151 | Solid state method for converting small pieces of metal into a void-free workpiece | US3768139D | 1971-03-08 | US3768139A | 1973-10-30 | WHALEN M; TREPAINIER N; KRAUS R; MALLECK J |
| A method of converting scrap or other small pieces of metal into a useful, commercial product while maintaining the metal in a solid state. According to the process, the pieces are maintained together for further processing. They are impacted, while heated, to produce a metal body and thereafter subjected to continued impaction so that the pieces forming the body are welded together into a cohesive, homogeneous slab. There is also disclosure of a novel press and method of operating the press. The press is of the harmonic type. Its novel aspects include control of movement of novel platens during rotation of shafts which drive the platens and perimetral constraint of a workpiece being forged to achieve rapid impaction and self feed of a workpiece. There is also disclosure of a novel method for making flakes of steel, a novel furnace including seals for maintaining the furnace gas-tight, a novel method in which the pieces of metal are scrap steel and baled together into a bale in which the scrap pieces of random size and shape become intertwined together and novel processes and apparatus for cleaning scrap or other metal pieces.
|
||||||
| 152 | Method for manufacturing compacted tubes and rods | US3629929D | 1969-07-03 | US3629929A | 1971-12-28 | WESSEL OTTO |
| The disclosure relates to utilization of metallic shavings, usually regarded as waste. The shavings are compressed to billets and extruded. Prior to extrusion the shavings and/or the billets may be annealed. To control composition the shavings may be mixed with particular powder at selected ratios prior to compression.
|
||||||
| 153 | Deoiling and briquetting apparatus | US3627288D | 1970-02-24 | US3627288A | 1971-12-14 | MACDONALD WARD D |
| This disclosure relates to an apparatus for making metal briquettes for foundry operations from oily particulate material. The briquettes are made, for example, from oily metal particles, such as metal turnings, which are fed to a furnace to burn the oil therefrom. In the furnace, the particles are heated to a high temperature of, for example, 1,200* to 1,400* F. The heated and deoiled particles are passed directly to a hopper which feeds the briquetting mechanism. The temperature of the deoiled particles is sensed and is maintained within a predetermined range for briquetting by adjusting the feed to the furnace in accordance with the sensed temperature. The amount of deoiled particles in the feed hopper is controlled to prevent overflow of the feed hopper and to maintain the density of the briquettes by sensing the level of deoiled particles in the feed hopper and adjusting the speed of the briquetting rolls accordingly to maintain the proper level.
|
||||||
| 154 | Metal briquette compacting method and machine therefor | US3450529D | 1968-03-19 | US3450529A | 1969-06-17 | MACDONALD WARD D |
| 155 | Process of producing iron powder from cheap source material | US44508442 | 1942-05-29 | US2381024A | 1945-08-07 | JOHN WULFF |
| 156 | Process of producing iron and steel bars | US28011519 | 1919-03-01 | US1354492A | 1920-10-05 | LLEWELLYN JONES |
| 157 | Treatment of scrap iron or steel. | US1896610262 | 1896-10-28 | US644719A | 1900-03-06 | MCDOWELL MALCOLM |
| 158 | Improvement in reworking steel | US160209D | US160209A | 1875-02-23 | ||
| 159 | MATERIAL HANDLING IN ADDITIVE MANUFACTURING | US15607055 | 2017-05-26 | US20180339466A1 | 2018-11-29 | Eahab Nagi EL NAGA; John Russell BUCKNELL; Kevin Robert CZINGER |
| Systems and methods for material handling in additive manufacturing systems are provided. Environmental control can decrease exposure of a powder to substances that change a material property of the powder and/or that change a property of a build piece formed from fusing the powder. Powders can be mixed for use in PBF systems. For example, a powder that has been through a printing operation can be reused by mixing the reuse powder with new powder. Powder can be recovered after a printing operation and reused, recycled into new powder, etc. Powder can be decontaminated for better reusability. | ||||||
| 160 | Method for sorting a collection of bodies comprising cemented carbide bodies and non-cemented carbide bodies | US14730279 | 2015-06-04 | US09770720B2 | 2017-09-26 | Ulf Jutterstrom |
| The disclosure relates to a method for sorting a collection of bodies including cemented carbide bodies and non-cemented carbide bodies. A melt having one or more of bismuth, tin and lead and having a density in the range of 7.0-12.0 g/cm3 is provided. The collection is subjected to a sorting process based on density difference by providing the collection in the melt and allowing the bodies to be sorted into a first group at a top surface of the melt and a second group at a bottom of the melt. The first group includes non-cemented carbide bodies having a density lower than the density of the melt and the second group includes cemented carbide bodies having a density higher than the density of the melt. The present disclosure also relates to a method for recycling of cemented carbides comprising the sorting method and recycling of the second group. | ||||||
QQ群二维码
意见反馈
意见反馈