9 results about "Contact strength" patented technology

The application discloses a special thread oil sleeve selection method, device, equipment and medium, including the following steps: obtaining special thread oil sleeve specification parameters; obtaining the CEE curve of the special thread oil sleeve according to the equivalent yield model; obtaining the high anti-extrusion level, and obtaining the extrusion curve according to the high anti-extrusion level and the pipe body extrusion model; obtaining the VME curve and the distribution curve diagram of the sealing surface contact pressure on the sealing width at different load points according to the CEE curve and the extrusion curve; then obtaining the sealing contact strength value at different load points in combination with the sealing contact strength calculation model; grading the sealing contact strength; determining the sealing performance grade; and selecting the special thread oil sleeve of the corresponding grade according to the downhole service temperature and pressure to make the material selection plate. The special thread oil sleeve of the similar grade is selected in combination according to the downhole service temperature and pressure, and the best economic special thread oil sleeve is selected according to different well depths, so that the cost is reduced.

The invention relates to an efficient polishing method for aluminum products, which belongs to the technical field of bathroom aluminum products, and comprises the following steps: dividing a surface to be polished into a first surface area, a second surface area and a third surface area covering the whole surface, and respectively setting pre-polishing and fine polishing parameters with different strengths; in the pre-polishing stage, the machining track of the third surface area is in lap joint with the first surface area and the second surface area so as to weaken the machining difference at the boundary, and in the fine polishing stage, the first surface area is subjected to high brightness at the rotating speed of 1700 r / min-1800 r / min of a main polishing head which is set through speed increase of a belt speed change mechanism; and meanwhile, lower contact strength or shorter contact time or an intermittent mode is adopted for the second surface area to restrain heat generated by friction to avoid burning loss, so that high brightness and efficiency of the plane are guaranteed, the risk of burning loss of the edge is reduced, and connecting marks and gloss mutation between the plane and the edge are eliminated.

The application provides a method and system for measuring the contact strength of an adjustable diameter bolt. The test method involves installing a cone sleeve assembly into a test fixture, then fixing and installing it into a torsion testing machine. A rotating torque is applied by the torsion testing machine. The contact surface parameters, including the contact surface strength, are measured and calculated by combining the locking torque and the test complex structure parameters. By controlling a variable, the correlation between the contact surface strength and the variable is analyzed, thereby avoiding the influence of other factors and improving the accuracy of the test. The system involves a test sleeve, a locking nut, an adjusting ring, a guide rod and other simple tools and tooling. The contact surface parameters of the cone sleeve assembly are measured, and the correlation between the contact surface parameters and other factors is analyzed. Standard tools and equipment are used for installation and testing, and the method can be used for comparative testing of various specifications, diameters and different parameters.

The utility model discloses a high-strength wear-resistant change gear set, and belongs to the technical field of gears. The gear set comprises a multi-stage speed change gear, a gear set center shaft and a speed regulation gear ring which are all made of carburized and quenched alloy steel. The gear tooth middle section of the change gear is provided with an oil passing groove to improve lubrication, tooth surface bevel angles are machined at the two ends of the tooth crest to reduce meshing impact, and a tooth bottom groove is plated with a hard chromium wear-resistant layer to improve wear resistance; shaft hole oblique angles are arranged on two sides of the central shaft hole and are matched with transition oblique angles of the central shaft to reduce assembly friction; and the contact area of the adjacent gears is reduced by the annular tooth surface grooves at the spokes. Through structural optimization and surface strengthening, the wear resistance and the contact strength of the gear are remarkably improved, the service life of a change gear set is prolonged, and the gear set is suitable for a high-load gearbox system.

The utility model relates to the technical field of touch switches, in particular to a high-durability touch switch, which comprises a base, a contact fixed at the bottom of the inner side of the base, a fixed frame fixed at the bottom of the base, an elastic sheet sleeved at the top end of the fixed frame, a plunger placed at the top end of the elastic sheet, and a spring arranged between the bottom of the plunger and the inner side wall of the base. The top end of the plunger is provided with a switch cover, four corners of the switch cover are fixed in the base, a fixing groove is formed in the middle of the top end of the fixing frame, a table body structure is formed between a bent part on the outer side of the top end and an elastic piece, a fixing frame structure at the bottom can limit a single-time downward pressing stroke, and if the force is large, the elastic piece can be directly compressed to make contact with the top end of the fixing frame. Compared with the existing structure, the device has the function of preventing the loosening of the switch or the displacement of internal parts caused by equipment vibration or external force impact, the influence on the normal work of the device and the shortening of the service life are avoided, and the durability is prolonged.

The invention provides a root digging type gear and a gearbox, belongs to the technical field of gearboxes, and aims to solve the technical problem that the bending strength of a gear in a wind power gearbox is limited and the contact strength is rich. The area between every two adjacent teeth is a tooth groove, each tooth groove comprises a rear side tooth surface line located on the front tooth, a front side tooth surface line located on the rear tooth and a tooth root transition line connected to the bottom of the rear side tooth surface line and the bottom of the front side tooth surface line, and the rear side tooth surface line and the front side tooth surface line are both cut with the tooth root transition line. The technical effects of reducing the stress concentration coefficient of the tooth root and improving the comprehensive bending strength are achieved.

The utility model relates to the technical field of headband wire assemblies, in particular to a high-performance headband wire assembly, which comprises a wiring end and a cable connected with the wiring end, limiting plates are fixed on two sides of the front end of the wiring end, empty grooves are formed in the middle parts of the two groups of limiting plates, and reeds are fixed in the empty grooves. The limiting plate structure with the curved protrusion can be in interference contact with an external structure, the outer side of the limiting plate with the larger thickness can be bent outwards to achieve the buckling and pressing effect, the curved protrusion structure can achieve the functions of adapting to interfaces of different sizes and improving the fixing effect, the reed structure is arranged in the limiting plate, and therefore the fixing effect of the limiting plate is improved. When the spring piece is in contact with an external structure, the protruding spring piece structure can clamp the external structure through self deformation, and the bent spring piece structure is matched with the limiting plate structure on the outer side, so that the contact strength and the clamping effect can be improved.

The invention discloses a cable joint connector which comprises a conductive pipe body, the section of the inner wall of the pipe body is circular, and convex parts and concave parts which are alternately arranged at intervals are arranged in the circumferential direction of the outer wall of the pipe body. Materials of the convex parts of the pipe body are extruded and flow to the adjacent concave parts through applied pressure F of up-down involution of an external mold and first partial pressure F11 and F12 which are parallel to the tangent line of the most convex point and are opposite in direction, the outer wall of the pipe body forms a quasi-circular shape, corner and tip discharge is avoided, and secondary corner and tip polishing work is not needed. Meanwhile, in the extrusion flowing process of materials of the convex parts, pressure F acting on the convex parts generates second partial pressure F2 pointing to the circle center of the inner wall, after the second partial pressure F2 of each convex part is crimped, the inner wall of the pipe body extrudes and is attached to a wire in the inner wall, and due to the fact that stress is uniform, the inner wall of the crimped pipe body is similar to a circle, the contact area is increased, and the contact strength of the wire is improved. And the working resistance of the crimped connector is reduced.

The utility model relates to the technical field of dies, and provides a die structure which comprises a lower die, an upper die is arranged above the lower die, a hinge is arranged between the lower die and the upper die, and a fixing mechanism is arranged above one side of the lower die. According to the mold structure, the inserting plate, the inserting groove and the connecting assembly are adopted, the upper mold body and the lower mold body can be preliminarily connected, follow-up fixing of the upper mold body and the lower mold body is facilitated, and the fixing mechanism is adopted to fix the upper mold body and the lower mold body under the cooperation effect of the bending plate, the rectangular strip, the positioning assembly, the threaded rod, the guide rod, the lower connecting plate, the abutting plate and the positioning block. The upper mold and the lower mold can be tightly attached, the situation that the mold is ejected open due to raw material expansion in the forming process, and raw material waste is caused is prevented, meanwhile, under the action of a reset spring, the contact strength of an abutting plate and the upper mold can be further improved, connection between the upper mold and the lower mold is effectively enhanced, and the practicability of the device is improved.