摘要:
A method of producing an anchor bonded composite plate. Anchor cavities are formed in a base plate by placing a forming plate with a circular hole therethrough over the base plate at a selected anchor cavity location. A punch placed through the circular hole then applies a punching force to the base plate, thereby forming in the base plate an annular mound with a concentrically punched hole. The mound is next pressed with a leveling plate to cause the material of the mound to flow inside the punched hole forming an anchor cavity with an overhanging internally tapered surface. A cladding plate with a plurality of anchor holes is then placed on the base plate with its holes aligned with the cavities of the base plate. An anchor pin is inserted in the thus aligned openings and is plastically deformed to mechanically bond the plates together. The cladding plate and the base plate may be made of an aluminum alloy and a hard steel, respectively. The composite plate thus produced is applicable as a reaction plate for a linear motor vehicle and as a tank material for a liquid natural gas holder.
摘要:
A composite structure is manufactured by joining a first material, preferably made of a magnetically permeable material and having a first joining surface in which a recess having an overhang surface is formed, to a second material, preferably made of an electrically conductive material and having a second joining surface to be joined to the first joining surface of the first material. On the second joining surface is integrally formed a protrusion having an outer configuration substantially corresponding to the inner shape of the recess. The first and second materials are firmly mechanically joined to each other by, for example, a casting method, a rolling method, a pressing method, or a method utilizing plastic flow of the second material.
摘要:
A composite structure is manufactured by joining a first material, preferably made of a magnetically permeable material having a first joining surface in which a recess having an overhang surface is formed, to a second material, preferably made of an electrically conductive material having a second joining surface to be joined to the first joining surface of the first material. On the second joining surface is integrally formed a protrusion having an outer configuration substantially corresponding to the inner shape of the recess. The first and second materials are firmly mechanically joined to each other by, for example, a casting method, a rolling method, a pressing method, or a method utilizing plastic flow of the second material.
摘要:
A composite bar structure is composed of at least outer and inner members extending parallelly in the longitudinal direction of the structure and joined mechanically at an interface therebetween in an interlocked. The structure is fabricated by forming a plurality of projections on the inner member over the entire interface, preparing the outer member in a tubular shape to readily encompass the inner member, relatively positioning the members to place the inner member within the outer member in telescoped state, and applying a constrictive compression force on the outer member so that it undergoes plastic deformation and reduction in diameter, whereby the projections bite into the inner surface of the outer member. The members are thus joined tightly to form the integral composite bar structure.
摘要:
For reducing the diameter of any axially limited part of a metal tube, that part is heated externally by an annular heater while at least the adjacent part or parts of the metal tube are being cooled and held at a temperature sufficiently low to limit the free thermal expanison of the heated part. On cooling, the part that has been heated becomes less in diameter than the other portions of the metal tube. The complete length of the metal tube can likewise be reduced in diameter by moving the annular heater and the metal tube relative to each other in the longitudinal direction of the tube from one end to the other while at least the adjacencies of the part being heated are being cooled as by water. The same method is adaptable for the fabrication of wear-resistant dual wall pipe for the transportation of fluids, as is also disclosed herein.
摘要:
A composite structure is manufactured by joining a first material, preferably made of a magnetically permeable material and having a first joining surface in which a recess having an overhang surface is formed, to a second material preferably made of an electrically conductive material and having a second joining surface to be joined to the first joining surface of the first material. On the second joining surface is integrally formed a protrusion having an outer configuration substantially corresponding to the inner shape of the recess. The first and second materials are firmly mechanically joined to each other by, for example, a casting method, a rolling method, a pressing method, or a method utilizing plastic flow of the second material.
摘要:
A pair of soft-metal blocks are placed side by side constrainingly on a stationary platen with a space therebetween such that the opposing flank surfaces of the blocks confront each other. Into the space is pressed downward by a movable platen a hard-metal block which has opposing flank surfaces having sharp edges at the lower ends thereof, respectively, the opposing flank surfaces also tapering correspondingly. As the hard-metal block is moved forcibly into the space, the edges operate to pare or peel respective surface layers of the opposing flank surfaces of the soft-metal blocks thereby to create respective fresh surfaces of the soft-metal blocks. The opposing flank surfaces of the hard-metal block are therefore pressed strongly against the fresh surfaces, respectively, as the hard-metal block advances, and strong diffusion welded joints are produced. The method is carried out at elevated temperature.
摘要:
A composite cylinder head of an internal-combustion engine includes a bottom wall part to face the combustion chamber and a reinforcement part disposed on the side of the bottom wall part opposite to the combustion chamber and functioning as a back-up reinforcement of the bottom wall part. The two parts of the cylinder head are joined into a single integral structure. The bottom wall part is formed from a metal of higher high-temperature strength and lower thermal conductivity than those of the material of the reinforcement part. This cylinder head makes possible the use of a higher maximum pressure within the cylinder than that in the case of a conventional cylinder head.
摘要:
In an electron beam excited ion irradiation apparatus which irradiates ions to a material, an electrical discharge changes an inert gas into a plasma. Electrons are drawn from this plasma and are made into electron beams. The electron beams are passed through an active gas to create ion. When the ion is irradiated to a material, electron components of the electron beams, which are irradiated vertically to a surface of the material are changed their irradiation direction. Control of the range of electron beam irradiation is performed by a magnetic filed formed so as to surround the ion beams.
摘要:
A process for producing a silane-modified cationized polymeric compound, the process including the steps of: (1) cationizing a water-soluble polymeric compound in a mixed solvent of a water-miscible organic solvent and water in the presence of an alkali to produce a slurry containing a cationized polymeric compound, (2) adding an aminosilane compound to the slurry or a cake produced therefrom, thereby treating the cationized polymeric compound with the aminosilane compound, (3) optionally adding an acid to the slurry obtained in step (1) or a product obtained in step (2), and (4) drying a product obtained in step (2) or a product obtained by performing step (3) after step (2), wherein the drying step (4) includes a primary drying treatment step of performing drying at a temperature of 50 to 140° C. under a degree of vacuum of 4.0 to 53.3 kPa, and a secondary drying treatment step of drying the product obtained following the primary drying treatment at a temperature of 90 to 155° C. The process enables a silane-modified cationized polymeric compound having excellent water dispersibility to be produced with good efficiency.