33results about How to "Improved Wall Thickness Accuracy" patented technology

The invention discloses a seamless thin-walled pipe drawing die for integrated circuits, comprising a drawing die set, an inner die set, a mandrel, a fixed-diameter inner die, a reduced-diameter inner die, an oil-coated die post, and an oil-coated ring groove , Oil storage tank, oil guide channel, reducing die groove, fixed diameter die groove, annular oiling mechanism, heat conduction channel and heat conduction copper pipe. The invention enables the mold to inject drawing oil into the pipe during the drawing process to form a protective oil film, reduce friction, improve the surface smoothness of the material, protect the mold, and prolong the service life. Rotating under the action effectively prevents Zhongtong from thinning and thickening the wall thickness beyond the control range, thereby improving the accuracy of the wall thickness and improving the production quality.

The invention provides a metallurgical slag basin modelless casting method, which comprises the following steps: using a corner core box to make sand cores at the four corner ends of the slag basin, obtaining the outer contours of the four corner ends of the casting slag basin, and molding the slag basin by means of a scraper, Form the sand mold of the outer contour of the slag basin casting; mend the skin: use multi-layer boards or molding sand to fill and assemble the cavity part of the mold to form the outline of the slag basin sand mold; lower the sand to form a sand core box; lower the core and close the box, compared The original method of casting by making molds. In this method, the length, width and wall thickness of the slag basin can be adjusted arbitrarily, so the slag basin of any size can be made, replacing multiple sets of molds, which can be reused and greatly reduces the At the same time, the problem of uneven wall thickness of castings is avoided, and the wall thickness accuracy of slag basin castings is improved.

The invention provides a finish rolling technique for a large diameter skew rolling reeling seamless steel tube, and the technique is carried out under a temperature being higher than 900 DEG C. The finish rolling technique includes the following processes: a. a blank is perforated by a piercer; b. the blank after being perforated in the above process is subject to tube rolling by a tube mill to form a crude tube; c. the crude tube formed in the above process is evenly reeled by a reeling mill, wherein, between the process b and the process c, the process of pre-rotating the crude tube is carried out, and in the process, the crude tube is pre-rotated at a speed lower than a rolling speed by a pre-rotating device, thus leading the crude tube to move toward the direction of the reeling millwhile pre-rotating, and meanwhile, the crude tube is pushed into the reeling mill by a pushing device; thus perfectly solving the rolling process of crude tube biting, fully exerting reeling function, raising the wall thickness accuracy to minus or plus 1-3 percent, saving 5 percent of energy; and increasing metal yield by 2 percent.

A surface-strengthened inner step shaft precision forming process, first design the blank, and then pump lubricant into the inner area formed by the lubricant-filled main flow channel and the lubricant branch channel of the mandrel; then assemble the mandrel and the blank, Install the rotary forging machine through the installation hole at the back of the mandrel, the mandrel and the blank are subjected to the high-frequency forging of the forging die, and the rotary forging forms a large inner hole; then adjust the position of the mandrel and the blank, from the raised part of the blank Start rotary forging, rotary forging to form a small inner hole; replace the mold for strengthening, assemble the rotary forging machine, reduce the motor speed of the rotary forging machine to reduce the impact energy of the mold, and forge the entire surface of the billet after the inner hole rotary forging, Add uniform compressive stress on the surface of the blank to achieve a secondary surface strengthening effect similar to shot peening impact; finally remove the workpiece; the invention can not only ensure the formation of the inner hole, but also effectively strengthen the surface of the shaft and improve the fatigue strength.

A large-width aluminum alloy ribbed plate, a production method thereof and an extrusion perforating needle belong to the field of aluminum alloy material processing. In the production method of the large-width aluminum alloy ribbed plate, casting, preheating, and extrusion are made into an aluminum alloy ribbed pipe material, which is cut and flattened after quenching, and then heat-treated to obtain an ultra-wide and high-strength pipe that meets the requirements of the hull. 1. A large and wide aluminum alloy ribbed plate with high corrosion resistance; and an extrusion perforation needle is provided for extrusion, and the performance can be further improved compared with the aluminum alloy solid ingot extrusion. This production method can avoid the welding passes of friction stir welding used in the existing process in order to realize the mass production of large and wide aluminum alloy ship plates, reduce the number of welds, greatly improve the overall strength and sealing of ships, reduce production costs, and improve production efficiency.

The invention discloses a control system for a push rod trolley mechanism. The control system includes: a hydraulic cylinder, a servo valve control assembly, a directional valve control assembly, a detection module and a control module; one of the fixed end and the output end of the hydraulic cylinder is connected to the base of the ejector trolley mechanism, and the other is connected to the positioning seat of the trolley; The servo valve control component and the directional valve control component are respectively connected to the two inner chambers of the hydraulic cylinder, and form a hydraulic control circuit with the system pressure oil, system return oil and system drain oil, which are used to control the position and moving speed of the output end; the detection module is used It is used to detect the position and moving speed of the head of the ejector trolley mechanism; the control module is respectively connected to the servo valve control component, the directional valve control component and the detection module, and is used to control the servo valve control component and the directional valve control component according to the detection results of the detection module. The ejector trolley mechanism control system of the present invention can perform on-line and off-line adjustments to the position of the rotary expansion machine head according to the requirements of the rolling process.

The invention provides a method for producing a seamless steel tube with a heat preservation cover of a pilger mill, which comprises the following steps sequentially: conveying a blank tube to the pilger mill to produce a crude tube; providing the heat preservation cover to carry out heat preservation and temperature rise on the crude tube in the process of rolling the crude tube; cutting off a leather head of the crude tube which is subjected to heat preservation and temperature rise; and providing a reeling mill to carry out reeling on the crude tube the leather head of which is cut off. Due to the characteristics of the pilger mill and the combination allocation of the pilger mill and the reeling mill, the method for producing the seamless steel tube of the invention utilizes the heat preservation cover to carry out random rolling, heat preservation and temperature rise on the crude tube, can solve the oxidation problem of the inner surface, saves energy, reduces consumption and reduces investment.

The invention discloses a method for manufacturing a cylinder barrel for a hydraulic cylinder, which uses a hot-rolled coil as a raw material and undergoes the following steps in order to obtain it: (1) cutting the coil into strip steel; (2) cutting the coil into strip steel; ERW welding to form welded pipes; (3) Quenching and tempering heat treatment for welded pipes; (4) Cold reduction for welded pipes; (5) Precision straightening for welded pipes; (6) Non-destructive testing for welded pipes; Cut to length; (8) Finish the inner and outer surfaces of the welded pipe. This method makes full use of the high precision of the outer diameter and wall thickness of the ERW welded pipe, the high strength and high toughness of the quenched and tempered heat-treated material, the high precision of the cold reduction diameter, the high surface finish and high efficiency, and the precision straightening to improve the straightness and roundness of the steel pipe without damage. The detection improves the reliability of the cylinder. When used as a multi-stage cylinder, the machining allowance of the outer circle is small and the efficiency is high. The high concentricity of the welded pipe and the machining allowance of the scraping and rolling of the inner hole are small, high-precision and high-efficiency.

The invention relates to the technical field of seamless steel pipe perforation, in particular to an ejector rod of a seamless steel pipe perforating machine. The ejector rod comprises a hollow conical ejector head, a cylindrical connecting rod with an internal cylindrical hollow cavity, a connecting section, a three-roller guiding apparatus and a cooling water pipe, wherein the connecting rod is connected with the ejector head by virtue of a bolt, the connecting section is connected with the connecting rod by virtue of a bolt, the three-roller guiding apparatus is installed at the outer side of the connecting section, the connecting section consists of a first connecting section, a second connecting section, a combination of N third connecting sections and the second connecting section and a tail rod section, which are successively connected with one another. The connecting section of a traditional ejector rod is divided into a plurality of sections, a bearing is installed on the second connecting section, so that the second connecting section and the third connecting section can be increased according to a perforating length, and the dynamic unstable contact between the ejector rod and a guiding rod when in rolling can be effectively solved.

The invention relates to an omnidirectional multi-functional disk type elongating mill, the diameters of an upper and a lower guide disk are increased; the lifting of the upper guide disk adopts a turbine, a worm and a leading screw device; the lifting of the lower guide disk adopts a standard spiral elevator; and the axial direction adjustment is realized by the standard spiral elevator; the positive direction location, lateral direction location and upper and lower direction location are realized by a hydraulic cylinder. The axial direction adjustment of the roller is realized by the standard spiral elevator; the radial direction is adjusted by the combination of a non-standard spiral elevator and the hydraulic cylinder; the locking device adopts the hydraulic cylinder and an adjusting wedge mechanism. Guide bushes of an outlet and an inlet port adopt the upper-pressing and lower-locking of the hydraulic cylinder. The reliability is increased by adopting the hydraulic system; the enlarged diameters of guide disks can improve the locking condition of the roller, the elongation coefficient is increased, screw threads in the steel tube are reduced after rolling, and the variety of products is enlarged; gaps of the axial direction and radial direction of the guide disks and the roller are reduced, and the stability of the rolling is strengthened; the structure of the side pressure oil cylinder of the roller is simple, and the running is reliable; the guide bushes of the outlet and inlet port adopt the upper-pressing and lower-locking device to realize the double-assurance.

The invention discloses a four-roller continuous pipe rolling mill, which comprises a tunnel-type archway, rolling frames sequentially arranged along the central axis of the tunnel-type archway, roll assembly located in the rolling frame, and a device for driving the assembly and rotation of each roll. Transmission system, each rolling stand is equipped with four sets of roll assemblies, and each roll assembly is respectively connected to a set of roll gap adjustment devices for adjusting the roll gap. The roll gap adjustment devices are fixed on the tunnel-type archway. The rolling frame is also equipped with a roll changing device for the rolling frame to move back and forth along the central axis of the tunnel-type archway; the four rolls are driven independently, which can make the circumferential speed of the steel pipe consistent, the deformation uniform, and the hole The type is more closed, which improves the wall thickness accuracy of the product, reduces rolling defects, and expands the range of product specifications that can be rolled.