9results about How to "Reduce work hardening" patented technology

The invention discloses an expansion forming method for a socket and spigot type flexible connector steel pipe, and belongs to the technical field of socket and spigot type pipeline forming. The invention discloses a socket and spigot type flexible connector steel pipe expansion forming method. The method comprises the following steps that the end of a steel pipe is treated; one end of the steel pipe is inserted into an expanding mechanism of the expanding device, and the inner die moves outwards to conduct expanding flaring forming on the end of the steel pipe; flattening the flaring end of the steel pipe through a flattening device; a socket end is formed through a socket forming mechanism arranged at one end of the forming device, and a socket end is formed through a socket forming mechanism arranged at the other end of the forming device; and feeding the formed steel pipe into an inspection bench for inspection. By the adoption of the expansion forming method for the socket-and-spigot type flexible connector steel pipe, the problems that an existing socket-and-spigot type flexible connector steel pipe is low in forming efficiency, poor in socket forming quality and prone to cracking can be solved.

A single crystal seamless copper tube production equipment and process for air conditioning and refrigeration, belonging to the technical field of metal processing equipment. The equipment consists of a melting furnace, an induction body, a casting furnace, a casting mold, a heating device, a cooling device, a coiler and a coiling machine. The process is to put the copper billet into the melting furnace, and the induction body at the bottom of the melting furnace performs induction heating on the copper billet to melt it to form copper liquid, and keep it warm; under the action of the communicating vessel, the copper liquid enters the furnace chamber of the casting furnace and stands for a specified time, when the copper tube is extruded from the casting mold, it enters the heating device for gradient heating, so that the grains grow in one direction to form a single crystal structure, and is further cooled in the cooling device. Finally, after being coiled and fixed to length by the coiler, the copper tube is transferred to the coiling machine for high-speed stretching and forming. The equipment of the present invention is simple, energy-saving, and has high production efficiency; it can directly carry out reprocessing processes such as drawing and forming; thereby solving the shortcomings of too long a process and high energy consumption.

The invention belongs to the technical field of rolling, and relates to a rolling process for preparing ER50-6E welding wire steel with the tensile strength not larger than 1360 MPa and application of the ER50-6E welding wire steel. Billet steel is continuously fed, the in-furnace time is controlled to be not shorter than 110 minutes, the heating temperature is 1100-1150 DEG C, and the soaking temperature is 1170-1220 DEG C; the initial rolling temperature is 1070 DEG C to 1120 DEG C; the finish rolling temperature is not lower than 960 DEG C; and the water amount of finish rolling cooling water is reduced so that the finish rolling outlet temperature can be increased to be not lower than 1050 DEG C, the spinning temperature can be 920-950 DEG C, a heat preservation cover is completely closed, the roller way speed is low, and the cover outlet temperature is controlled to be 650 DEG C or below. The tensile strength of a hot-rolled wire rod does not exceed 500 MPa, the yield strength does not exceed 310 MPa, the yield ratio does not exceed 0.63, the hot-rolled wire rod is suitable for drawing a 0.8 mm welding wire from a phi 6.5 mm wire rod, the tensile strength of the welding wire is not larger than 1360 MPa, and the hot-rolled wire rod has good wire feeding performance.

This utility model relates to a high-precision stainless steel stretching forming mold, belonging to the field of stretching mold technology. The initial stretching mold realizes the blanking and stretching, and then the cleaning component cleans the initial part. After cleaning, the heat treatment component performs heat treatment to reduce the hardness of the initial part and eliminate internal stress. Then, the initial part is stretched and thinned a second time through the secondary stretching mold to form the intermediate part. Then, the 45-degree flanging mold and the 90-degree flanging mold are used to shape the angle of the intermediate part. Finally, the edge trimming mold removes the excess edges and corners of the intermediate part to form the finished part. This production process can reduce the cold work hardening of stainless steel and prevent surface scratches and cracks. After stretching and forming, the product can meet the requirements for surface roughness and flatness of the parts.

The invention provides a total synthesis titanium alloy cutting fluid and a preparation method thereof. The total synthesis titanium alloy cutting fluid is prepared from the following raw materials in parts by weight: 55 to 60 parts of deionized water, 22 to 26 parts of sulfonate type ionic liquid, 7 to 9 parts of extreme pressure additive, 4.5 to 5.5 parts of antirust agent, 2.5 to 3.0 parts of catalase, 1.2 to 1.6 parts of antibacterial agent, 1.2 to 1.6 parts of stabilizer and 1.0 to 1.5 parts of defoaming agent. The prepared fully-synthesized titanium alloy cutting fluid can effectively lubricate titanium alloy for a long time under the conditions of high speed and high temperature, so that the abrasion of a tool in the machining process is remarkably reduced, and the service life of the tool is prolonged. And meanwhile, the surface machining quality of the titanium alloy workpiece is also remarkably improved, so that the workpiece is smoother and more accurate.

The invention provides an aluminum alloy foil for a temperature control element as well as a preparation method and application of the aluminum alloy foil. The aluminum alloy foil comprises the following components in percentage by weight: 1.7 to 1.9 percent of Mn, 0.2 to 0.5 percent of Cr, 0.1 to 0.3 percent of Ti, 0.05 to 0.2 percent of V, 0.1 to 0.2 percent of Fe, 0.5 to 1.5 percent of Si, less than or equal to 0.2 percent of other inevitable impurity elements and the balance of Al; the preparation method comprises the steps that alloy raw materials are smelted and then poured into a copper mold with a water cooling system, an obtained cast ingot is subjected to cold rolling with the single-pass deformation of 20-40%, and then annealing and foil rolling are conducted. The aluminum alloy foil for the temperature control element, which is high in resistivity and easy to process, is obtained by adding metal elements in a specific proportion and casting a casting blank by adopting a copper mold in which cooling water is introduced, so that a large amount of effective elements are dissolved in a matrix, and by combining single-pass small cold rolling deformation, precipitation of the effective elements is reduced, and the aluminum alloy foil is suitable for a resistance heating element.

The invention relates to the technical field of external field auxiliary machining, in particular to an electric pulse treatment machining device and method based on a lathe. The machining device comprises a lathe structure, a positioning assembly and a carbon brush holder assembly. The lathe structure comprises a head chuck and a tail chuck, the head chuck is installed on a spindle chuck of a lathe in an insulated mode, and the tail chuck is installed on a tailstock of the lathe in an insulated mode. The positioning assembly comprises a positioning plate and a fixing plate, the positioning plate and a protective cover of the lathe are installed in an insulating mode, and the fixing plate and the positioning plate are in sliding connection in the axial direction of the lathe. The carbon brush holder assembly comprises a connecting frame and a carbon brush block, the connecting frame is installed on the lower side of the fixing plate and can ascend and descend relative to the fixing plate, the connecting frame is externally connected with a power source, the carbon brush block is installed on the lower side of the connecting frame, and the bottom of the carbon brush block is an arc-shaped face which is connected to the head chuck or the tail chuck in a pressed mode. The machining hardening in the machining process is weakened through the electroplastic effect, the machining difficulty is lowered, and the surface performance of the workpiece is remarkably improved.

The invention discloses a bell-and-spigot type flexible connector steel pipe punch forming method, and belongs to the technical field of bell-and-spigot type pipeline forming. The invention discloses a bell and spigot type flexible connector steel pipe punch forming method. The method comprises the following steps that the end of a steel pipe is treated; the steel pipe is fed into a stamping device, a punch is inserted into the heated end of the steel pipe, and stamping flaring forming is conducted on one end of the steel pipe; the steel pipe is fed into a flattening device, and the flaring end of the steel pipe is flattened; the steel pipe subjected to end flattening treatment is fed into a forming device, a bell end is formed through a bell end forming mechanism arranged at one end of the forming device, and a spigot end is formed through a spigot forming mechanism arranged at the other end of the forming device; and the formed steel pipe is fed into an inspection bench to be inspected, burrs at the two ends of the steel pipe are removed, polishing is conducted, and the socket type flexible connector steel pipe is obtained. By the adoption of the punch forming method for the socket type flexible connector steel pipe, the problems that an existing socket type flexible connector steel pipe is low in forming quality and high in defective rate can be solved.

The utility model relates to the technical field of silencers, and discloses a silencer assembly which comprises a cylinder body, stamping end covers are fixed at two ends of the cylinder body, pressing grooves are arranged on outer side surfaces of the stamping end covers in an array mode, connecting sleeves are fixed on the stamping end covers, silencing hole pipes are fixed in the connecting sleeves, red copper transition terminals are fixed at one ends of the silencing hole pipes, and the red copper transition terminals are fixed at the other ends of the silencing hole pipes. Silencing holes are formed in the silencing hole pipe in an array mode, and the stamping end cover is connected with the cylinder body in a welded mode. After the silencer assembly and the cylinder body are integrally formed, the stamping end covers which are independently formed are arranged at the two ends of the cylinder body, cold hardening in the material spinning process is reduced, the material cracking defect is avoided, the silencer avoids repeated spinning and rolling, the production cost is reduced, the machining efficiency is improved, the combination modes of the two ends of the cylinder body are diversified, and the practicability is high. The silencer assembly is suitable for various silencer structures, the stamping end cover is independently connected with the silencing hole pipe and the barrel in a welded mode, operation is easy, the production difficulty is lowered, and the service life of the silencer assembly is prolonged.