43results about How to "Dimensionally stable and reliable" patented technology

The invention relates to the technical field of welding, particularly to a device and a process for backstep welding of a damping spring disk. The device comprises a rotary table, a locating plate, a vertical plate, a rotating cylinder, a liquid storage cylinder pressing plate, a spring disk locating pin long seat locating plate, a spring disk locating pin long seat, a spring disk locating pin, a spring disk pressing plate, a spring disk locating round pin, a spring disk locating long pin, a spring disk locating pin seat, a liquid storage cylinder locating plate, and a reinforcement plate. Compared with the prior art, the disk is three-point located by the aid of a tooling and fixedly clamped through the rotating cylinder, welding thermal deformation after welding is reduced, dimensions after the welding are stable and reliable, and adjustment is convenient. The structure of the device for the backstep welding of the spring disk is simple and stable, the maintenance cost is low, and the device is convenient to maintain.

One kind of hydraulic pressure valve end shielding ramming take shape method, is realized according to the following steps,the initially take shape; Separately install the raised membrane and the concave membrane on the punch press work table and on the drift, starts the punch press, ram the sheet to become the sphere semifinished material; Reduces takes shape;installs the spread membrane which is the size shape with inner hole of the work, separately in the punch press work table and the drift, starts the punch press, presses evenly sphere crown of the sphere round hat semifinished materials, and reduces the lower part of the sphere, ramming full circle tubular, also hat brim presses evenly the sphere round hat semifinished materials circular, forms outside the belt along circle tubular semifinished materials; Stereotypia;install the work piece the hole size, the shape same raised membrane and with the work piece outer diameter size, the shape same concave membrane separately in the punch press work table and the drift, will start the punch press side,ramming the circle tubular semifinished material to the shape, the size tallies the request work piece semifinished materials, cutsthe work piece semifinished materials, namely will get the work piece which is conformed to the request.

The invention provides an ultrasonic wave motor rotor surface texture and a production method thereof. The surface texture is provided with recesses, and the diameter of each recess is in a range from 200 (mu)m to 400 (mu)m, the depth of each recess is in a range from 89.77 (mu)m to 108.5 (mu)m, and the area density of each recess is in a range from 3.14% to 12.55%. The production method is characterized in that a polyimide composite material is cut into slices and polished to be a material having the roughness less than 0.1(mu)m; the forming of the surface recesses of the polished surface of the material produced by the step A is carried out by adopting a laser etching technology, and at last, the back surface of the polyimide composite material is attached to the ultrasonic motor aluminum alloy rotor surface in an adhesive manner. The surface micro-structure produced by adopting the above mentioned technical scheme is advantageous in that the production is simple and effective, the cost is low, the size is reliable, the distribution is uniform, and operation stability of an ultrasonic motor contact interface is effectively improved, and service lifetime of a rotor friction material is prolonged.

The invention discloses a special machining fixture for round caps of special-shaped integrated components. The special machining fixture comprises a flat cylindrical fixture body, a positioning block, a balance bolt and a balance block. The positioning block, the balance bolt and the balance block are arranged on the upper surface of the fixture body, the positioning block and the balance block are respectively arranged on the left side and the right side of the balance bolt, a workpiece round cap accommodating station is formed between the positioning block and the balance block, the balance bolt is arranged in the middle of the upper surface of the fixture body and corresponds to a boss of a workpiece round cap, the positioning block comprises a block-shaped body, a workpiece shaft positioning hole and a seam, the workpiece shaft positioning hole is perforated through the block-shaped body in the left-right direction, the seam is perforated through the rear side surface of the workpiece shaft positioning hole and the rear side surface of the block-shaped body, a clamping screw hole which is perpendicularly perforated through the seam is formed in the block-shaped body, and a clamping bolt is arranged in the clamping screw hole. The special machining fixture has the advantages that the special machining fixture is reasonable and simple in structure, low in cost, high in clamping force, easy to maintain in follow-up procedures and applicable to large-scale production, and brings convenience for clamping operation, to-be-machined workpieces can be quickly clamped by the special machining fixture, machined workpieces are dimensionally stable and reliable, and the production cost can be effectively reduced.