42results about How to "Improve the passing rate of one-time inspection" patented technology

The invention discloses a wire / cable spinning mould, comprising a base, a thrust self-aligning roller bearing, a gear sleeve, a stranding die, an upper pressing cover, a signal pick-up device, a controller and a servo motor, wherein the thrust self-aligning roller bearing is arranged in each of the base and the upper pressing cover, the thrust self-aligning roller bearing is in interference fit with the gear sleeve, an external gear is arranged at one end of the gear sleeve, fastening antiskid bolts are arranged at the other end of the gear sleeve, the stranding die is in fixed connection with the gear sleeve by means of the fastening antiskid bolt, an in-die hole, a stranding tapered hole and a die exit are formed in the stranding die, and base fastening bolts are arranged at the lower part of the base. According to the wire / cable spinning mould disclosed by the invention, as the controller and the signal pick-up device are employed to acquire a spinning speed of an equipment stranding body, and a frictional force that is exerted by the stranding die in a tangential direction is eliminated by means of a synchronous and homodromous rotation of the servo motor and the spinning mould; the spinning mould has the advantages of small volume, low cost and long service life; material wastage is reduced by 15-20%; the one-time delivery qualification rate can reach 98-100%; and the product quality is improved greatly.

Disclosed is a method for protecting a paint spraying figurative protected zone. According to the method, before a part is sprayed with paint, protection is quickly and accurately carried out on a circular protected zone by using paper adhesive tape and two types of tools, namely two concentric-circle punches made of high-temperature alloy or stainless steel, and a circular punch made of high-temperature alloy or stainless steel; a bottom lamp is arranged at the bottom of a worktable, the surface of the worktable is made of transparent resin or transparent glass, and the bottom lamp irradiates on the part on the surface of the worktable through the worktable. The method includes the following specific technological processes: adhering the paper adhesive tape to rubber or plastic, punching a paper bag by using the concentric-circle punches and the circular punch to remove the rest surface adhesive tape, taking down the punched figurative adhesive tape, adhering the concentric-circle adhesive tape to the surface of the part, aligning small holes by using the bottom lamp, and covering the concentric-circle adhesive tape with the circular adhesive tape. The method for protecting the paint spraying figurative protected zone has the advantages that a protected zone on the periphery of a part hole can be made neat, circular shapes are regular, moving is prevented, and the qualification ratio under one-time acceptance check of products is improved.

The invention discloses a front axle seamless segment roll forging front axle beam forming process, which includes the following process steps: S1, blank: using a sawing machine to cut the material, and intercepting the round steel that meets the requirements of the process size; S2, heating: using 1500kW intermediate frequency induction Heating to make the temperature of the round steel reach 1200±20℃; S3, one roll forging: through the top hat-shaped hole system on one roll forging die, the forced widening of the two spring plate positions of the front axle beam is realized, and at the same time, one roll forging is carried out. The rectangular hole pattern system on the die deforms other parts except the position of the leaf spring, so that the width and height meet the requirements of the second roll forging process; S4, roll forging second pass: after the first roll forging, the front The axle beam is rotated 90° into the second pass, and the roll forging forming of the two spring plates of the front axle beam and the transition position of the spring plate to the fist and the pre-forming of the middle I-shape are realized through the two roll forging dies. The present invention has strong practicability. and features that eliminate roll forging and forming defects.

The invention discloses a low-alloy high-strength high-impact-energy extra-large special-shaped ring forging. Low-alloy high-strength steel comprises, by weight, 0.08-0.12% of C, 0.5-0.6% of Mn, lessthan or equal to 0.006% of P, less than or equal to 0.006% of S, 0.5-0.65% of Si, 1.4-1.5% of Cr, 0. 55-0.65% of Mo, 0.1-0.2% of Ni, less than or equal to 0.15% of Cu, less than or equal to 0.04% of V, 0.03-0.04% of Nb, 0.02-0.04% of Al, less than or equal to 0.01% of Sn, less than or equal to 0.01% of As, less than or equal to 0.0012% of Sb and the balance Fe and impurities, then through nozzle cold sawing, riser collection, riser heat chopping, then three times of upsetting and two times drawing, broaching chambering, special-shaped ring rolling, preparatory heat treatment, rough turning, sawing, preheating and arc finishing. In this way, chemical compositions of raw materials are optimized, a reasonable matching heat treatment system is adopted, the stability of the impact work can be improved through maximum simulated post-weld heat treatment of the materials, the product once inspection pass rate is increased to 100%, energy waste caused by rework and repair is avoided, the production cycle is shortened, the manufacturing cost is reduced, and the competitiveness of enterprises is improved.

The invention discloses an upper bending die for forging a round crank shaft. The upper bending die is provided with a die cavity for forging a crank throw in the round crank shaft, wherein the crank throw comprises two round cranks and a connecting rod neck located between the two round cranks. The upper bending die is also provided with a flash groove communicated with the die cavity and used for containing forging flashes of the mounting surfaces of the round cranks. By using the upper bending die for forging the round crank shaft, the forging flashes easily generated in extrusion molding of forging can exactly enter the flash groove, so that each crank throw can be extruded in place when being forged, the single-throw forging size can be controlled and conform to a design size, the length of the whole shaft is favorably controlled, the disposable delivery-check qualified rate of rough forgings is increased, and the quality of each forging is improved.

The invention relates to a method for improving the adhesion of a metal film layer of a high dielectric constant ceramic substrate, belonging to the technical field of fine processing of microwave integrated circuits. The surface layer of the above-mentioned substrate is roughened by array scribe etching with a specific performance ultraviolet laser, and the above-mentioned roughened substrate is calcined under high temperature conditions by using a specific temperature curve, so that the roughness obtained on the surface of the substrate is The Ra value is stable in the range of 0.25-0.3mm, and has good roughening uniformity, which improves the adhesion between the metal film layer and the substrate in the process of making microwave integrated thin film circuits when the substrate with high dielectric constant is used as the substrate.

The invention belongs to a composite material molding technology, and relates to helicopter composite material paddle fatigue test piece molding technological process which is suitable for helicopter composite material technological process molding. According to the invention, a platform thickness spacing tool is adopted, an interval between two splints of a paddle fatigue test piece is effectively ensured, and simultaneously the positioning of the spacing tool can insure symmetry of the two splints; and a working procedure of numerical control processing is directly omitted from a technical process, furthermore a manufacturing cycle is also shortened, once alternating detection qualification rate of the paddle fatigue test piece is improved, the rejection rate of the paddle fatigue test piece is zero, and the stability and the smoothness of the assembly process of the paddle fatigue test piece are ensured.