34results about How to "No trimming required" patented technology

The invention relates to a roller type electric needle moving device, and belongs to the carpet machinery field. The roller type electric needle moving device includes: a gear motor, a roller, and a frame, and is characterized in that the gear motor is arranged on the frame and the gear motor is connected with the roller. The motor drives the roller to match an operation speed with a needle speed so as to realize automatic moving. Needle steps are uniform and a carpet surface is flat without worker finishing.

The invention discloses a diamond grinding and polishing method; while the surfaces of diamond particles are ground and polished by the high-speed rotation of a grinding plate, a clamping device for clamping the diamond particles is driven by a driving device to rotate by means of the vertical line of the grinding and polishing surface of the grinding plate as an axis. With adoption of the technical scheme in the diamond grinding and polishing method, a plurality of diamond particles are rotated for 360 degrees around the vertical line of the grinding and polishing surface of the grinding plate, so that the grinding plate is capable of grinding the diamond particles in each crystal orientation; on one hand, the step of determining the grinding crystal orientations of the diamond particles in the prior art is omitted and the working efficiency is improved effectively; on the other hand, the uniform consumption of the grinding plate can be maintained, so that the service life of the tool is prolonged without repairing.

The invention belongs to the field of welding materials, in particular to a highly-antiwear drill pipe wear-resisting belt flux-cored wire. With the development of the petroleum drilling technology, the abrasion of casing pipes is more and more prominent. The wear of the casing pipes may reduce the collapse pressure strength and internal pressure strength of casing strings, and more seriously, cause to the collapsing, deformation and leakage of the casing strings and even scrapping of a whole well. The invention provides a highly-antiwear drill pipe wear-resisting belt flux-cored wire, which comprises the following deposited metal chemical components in percentage by mass: 15.0 to 16.0 percent of Cr, 5.5 to 6.0 percent of Mo, 3.5 to 4.0 percent of W, 0.9 to 1.1 percent of Y, 0.7 to 0.9 percent of C, 3.5 to 4.5 percent of B, 1.5 to 2.0 percent of Si, 0.8 to 1.0 percent of Mn and the balance of Fe. Compared with the friction coefficient of the ordinary welding wire, the friction coefficient of the highly-antiwear drill pipe wear-resisting belt flux-cored wire is reduced by 24 percent, and the abrasion of the casing pipes is reduced by 62 percent substantially; and the manufacturability is good. By the highly-antiwear drill pipe wear-resisting belt flux-cored wire, the abrasion of the casing pipes in drilling wells can be reduced substantially; and the highly-antiwear drill pipe wear-resisting belt flux-cored wire can be widely applied to the wear prevention and wear resistance of sliding friction dual components under other harsh operating conditions besides the highly-antiwear drill pipe wear-resisting belt flux-cored wire can be used for overlaying metal wear-resisting belts on petroleum drilling pipes.

The invention belongs to the field of grinding tools, and discloses a diamond grinding wheel and a preparation method thereof. The diamond grinding wheel comprises a base body and an abrasion block, and a raw material of the abrasion block contains a ceramic binding agent made of the follow raw materials: SiO2 of 40-46wt%, Al2O3 of 8-13%, B2O3 of 18-22%, Na2O of 8-10%, CaF2 of 11-15 wt%, Li2O of 4-6wt% and TiO2 of 1-2wt%. The diamond grinding wheel can effectively improve processing efficiency of gorilla glass, reduce processing cost, reduce pollution to environment, and meets the requirements for grinding and processing the gorilla glass. In addition, according to the diamond grinding wheel, firing temperature of a binding agent is low, holding force on an abrasion material is strong, damage on diamond is greatly reduced under a process system, and the grinding wheel does not need to be repaired in the grinding process.

The invention relates to a lower slide block stitch adjusting device, and belongs to the carpet machinery field. The lower slide block stitch adjusting device includes a slide block, an angle adjusting plate, a small shaft, a lower cover, a spring, an adjusting screw, a stitch adjusting knob member, and a slideway, and is characterized in that the small shaft is arranged on the slide block; the angle adjusting plate is connected to the small shaft; the lower cover is arranged on the angle adjusting plate; the adjusting screw traverses the spring and is connected to the slide block; the stitch adjusting knob member is arranged on the slideway; and the slide block is arranged on the slideway. The automatic moving is realized by adjusting lower cover tracks, and the stitch is uniform and carpet surfaces are flat without finishing by workers.

The invention relates to a preparation method of a grinding wheel applied to coaxiality grinding of a ceramic ferrule, and belongs to the technical field of ultra-precision machining of optical fiberconnecting material. The u preparation method comprises the following steps of 1, a diluted modified phenolic resin solution, a zirconium oxide hollow microsphere and calcium fluoride are added into ethyl acetate, and are stirred for 1 -3 hours at the temperature of 50-90 DEG C a sodium chloride solution is added, a mixture is heated for 45-90 minutes for at the temperature of 75-85 DEG C, a blockmixture is obtained, then modified polyimide resin is added, ball milling is carried out, and sieving is carried out to obtain a binding agent; 2, diamond and the binding agent prepared in the step 1are weighted according to the mass ratio of 1 to 3-8, sieving is carried out, pressing is carried out at the temperature of 280 DEG C with the pressure of 5 MPa to 15 MPa, the pressure maintaining time is 30-80 minutes, so that a grinding layer is obtained; 3, the grinding layer is bonded to fluorosilicone rubber, the fluorosilicone rubber is adhered to a grinding wheel base body to obtain a grinding wheel semi-finished product; and 4, feeding hole and the discharging hole chamfering of the semi-finished grinding wheel is carried out to obtain a finished product.

The invention discloses a heating stamping and riveting process for a gear gearbox. The heating stamping and riveting process comprises the following steps that a, integration blanking, punching and edge deburring are conducted to obtain a first semi-finished product; b, heating stamping and flanging are conducted, specifically, a heated flanging die stamps the heated first semi-finished product to enable the first semi-finished product to be provided with turned edges to obtain a second semi-finished product; and c, gear shafts are riveted, the second semi-finished product is subjected to heat preservation control, a riveting clamp clamps the gear shafts and heats the riveting parts of the gear shafts, the riveting clamp enables the heated gear shafts to be embedded into the second semi-finished product, and a riveting die enables the riveting parts of the gear shafts and the second semi-finished product to be connected in a pressed mode to obtain a third semi-finished product. Blanking, punching and deburring are finished through integration stamping, the steps are simplified, the machining accuracy of bending and gear shaft riveting is improved, the riveting parts of the gear shafts do not protrude out of the gearbox surface, thus dressing is not needed, and the riveting strength is high.