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.

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.

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 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.