48results about How to "No folding" patented technology

The invention relates to a processing method for a high-precision U-shaped titanium nail. The method comprises the following steps that a straightening mechanism is manufactured by utilizing cork materials; titanium wires are conveyed in the straightening mechanism, the rotating speed of a straightening raw is controlled to be 2800-3200 revolutions / min, the wire discharging speed is 2-3.5 circles / min, the wire winding speed of a wire winding mechanism is controlled to be 6-7circles / min for wire winding; and the titanium wires wound by the wire winding mechanism are convoyed into a cutter die,a die core is attached to cutters, after a forming mechanism presses down, a pressure spring and a pre-pressing block press the titanium wires tightly, then double cutters on the two sides act to cuttitanium wires on the two sides of the cutter die at the same time, the titanium wires are bent and formed, and a titanium nail with a U-shaped structure is formed. Compared with the prior art, the process of one-time punching forming has the advantages that the process is greatly simplified, the production efficiency is improved, and the processing mode is unique, so that products are greatly improved in terms of quality, performance and processing flexibility.

The invention discloses a continuous tapered upsetting die and upsetting method for a bar material with the superhigh height-diameter ratio. The method comprises the steps that 1, the height of the bar material is obtained according to the diameter of the bar material and the size of a forge piece; 2, the taper degree of a forming wall surface of a male die and the taper degree of a forming wall surface of a female die are selected, and the upsetting frequency, the layer number of the male die, the layer number of the female die, the height of each layer of male die modules and the height of each layer of female die modules are determined according to the taper angles of the forming wall surfaces, the height of the bar material and the upsetting ratio every time; 3, after the bar material, the female die and the male die are heated, first-time upsetting forming is conducted; 4, after first-time upsetting forming is completed, the male die module with the minimum average outer diameter and the female die module with the minimum average inner diameter are removed, second-time upsetting is conducted, and in this way, the steps are conducted till the height-diameter ratio of an upsetting part is smaller than the maximum height-diameter ratio of non-instable upsetting. According to the die, the female die is designed into multiple layered modules of which the inner walls have the certain taper degree, instability of blanks is constrained through the oblique wall of the female die, and then a folding phenomenon cannot be generated.

The invention relates to a novel technology for forging a spline shaft of a transmission shaft. The novel technology includes following steps: (1), blanking; (2), medium-frequency heating; (3), pre-forging: after the medium-frequency heating, a blank material is placed in a cavity of a pre-forging die body of a spline shaft hammer forging die on a hammer forging machine, the hammer forging machine is controlled, a power drive end drives the pre-forging die body to stamp the blank material, and the blank material is stamped into a pre-forging piece of the spline shaft; (4), finish-forging: the pre-forging piece is placed in a cavity of a finish-forging die body of the spline shaft hammer forging die on the hammer forging machine, the hammer forging machine is controlled, the power drive end drives the finish-forging die body to stamp the pre-forging piece, and the pre-forging is stamped into a finish-forging piece. The novel technology is reasonable in design and simple in structure, forging pieces are easy to be formed, and rejection rate of the forging pieces is greatly lowered. Gathering process is eliminated, production efficiency is improved, and production cost and die making cost are lowered. Inner diameters of shaft body cavities of a pre-forging cavity and a finish-forging cavity are reduced, and processing amount of a machine is reduced and raw material is saved.