34results about How to "Reduce uneven wear" patented technology

The invention relates to a welding method. The method is for subjecting a pair of track rail steels to flash- butt welding, which is provided with a preheating step for causing a current to flow for a predetermined time period in a state in which the welding surfaces of the pair of the track rail steels are forced into contact with each other, and heating the vicinity of the welding surfaces by means of resistance heating, a previous flash step for partially generating flash on the welding surfaces, and heating the welding surfaces by means of the resistance heating and electric-arc heating of the flash, and a later flash step for further generating the flash on the entire welding surfaces, and uniformly applying heat to the entire welding surfaces by means of the resistance heating and electric-arc heating of the flash, wherein the later flash speed in the later flash step is 2.1-2.8 mm / sec inclusive.

A cleaning blade includes a cleaning layer facing an image holding body, and a back layer wich is disposed at a side opposite to the image holding body and removes discharge products and developer residues that are stuck to a surface of the image holding body in such a manner that an edge of the cleaning layer comes into contact with the surface of the image holding body, and the back layer and the cleaning layer are molded integrally and a surface roughness Ra of the cleaning layer is lower than or equal to 0.12 mum.

Disclosed is a door suspension apparatus that is capable of adjusting the position of a door in the open-close direction thereof without adjusting the positions of a latching part and a part being latched in a locking device. A drive connection unit (21) is provided with one from among the latching part (17) and the part being latched (18) in the locking device (13) that locks the door (11) to a structure in a fully-closed position through the latching of the latching part (17) and the part being latched (18), and is connected to an open-close drive mechanism (12). A door roller unit (22) is connected to the door (11) and provided with door rollers (36a, 36b, 36c) that run on a rail (19) fixed on the structure, and supports the door (11) in a suspended state freely sliding on the rail (19). A variable connection unit (23) connects the drive connection unit (21) and the door roller unit (22) in a manner enabling the alteration of the relative positions of the drive connection unit (21) and the door roller unit (22) in a direction along the lengthwise direction of the rail (19).

A treadmill and a control method for controlling the treadmill belt thereof are provided. The treadmill includes a treadmill belt, a first sensor, an image sensor and a controller. The first sensor retrieves a light pattern or the image sensor measures the characteristic properties of the image of the user so as to control the treadmill belt. The light pattern can be generated by a signal member, which can be disposed on a side or both sides of the treadmill belt.

The invention discloses a guide rail current collector and belongs to the technical field of track mobile device power supply apparatuses. The guide rail current collector includes a collector brush which is in sliding fit with a conductor rail, a yoke plate mechanism which is hinged to the collector brush, and a fixing rack which is hinged to the yoke plate mechanism and serves to connect a walking device. The collector brush has two ends that are along the sliding direction of the conductor rail separately provided in an oblique downward manner with a bevel [gamma] which tilts inwardly. The yoke plate mechanism includes a front pin which is hinged to the collector brush, a defining short rod which is connected to one side of the front pin in an oblique upward manner, and a yoke plate which is connected to the other side of the front pin in an oblique upward manner. The defining short rod and the yoke plate constitute an obtuse angle therebetween. The yoke plate is hinged to the fixing rack through a back pin. The collector brush and the fixing rack are connected to a braided wire for conducting electric energy therebetween. An included angle a constituted by the defining short rod and the collector brush constitute an included angle therebetween and an included angle b constituted by the yoke plate and the collector brush therebetween both range from 10 DEG to 30 DEG. According to the invention, the guide rail current collector has the characteristics of simple structure, wear resistance, long service life and deformation resistance.

The invention provides a wearing plate and a bogie with the wearing plate. The wearing plate comprises a wearing plate body and a limiting part. The wearing plate body comprises a first side board, a second side board and a bottom board connected between the first side board and the second side board, wherein the first side board and the second side board are oppositely arranged. An installation hole is formed in the bottom board. An installation space used for installing a wearing block is formed among the first side board, the second side board and the bottom board. The first end, in the length direction of the bottom board, of the limiting part is connected to the inner wall of the installation hole. The second end of the limiting part is a free end. The free end extends into the installation space to reduce the gap between the wearing block and the bottom board. By the adoption of the technical scheme, the problem that a braking device is likely to move transversely, and consequently wheels are worn unevenly in the prior art is effectively solved.

The invention discloses a roll pass optimizing method capable prolonging shaped roll service life. The method is characterized by including the steps of firstly, building a mathematic model to calculate the rolling state of a rolled piece under a target rolling process; secondly, predicting roll abrasion condition under current production process conditions, evaluating roll abrasion state, and converting roll abrasion quantity into roll repairing quantity; thirdly, optimizing roll passes and the rolling process by evaluating roll cutting quantity. By the method, roll abrasion state is effectively changed during profile rolling, roll uneven abrasion is reduced, cutting nonuniformity during roll repairing is improved, turning quantity required by each roll pass recovery is reduced by 3-10mm, roll turning times are increased by 1-2, and the service life of shaped rolls is prolonged.

A fixing member, including a releasing layer, wherein the releasing layer contains a fluoropolymer and a polysiloxane having a cross-linked structure, and wherein the fixing member is used in a process for heating a toner image on a recording medium to thereby fix the toner image onto the recording medium.

This welding method is a flash butt welding method of a pair of track rail steel pieces, having: a preheating process in which electric current is made to flow for a predetermined time in a state in which the welding surfaces of a pair of track rail steel pieces are forcibly brought into contact with each other, and vicinities of the welding surfaces are heated by resistance heating; a former flashing process in which flashing is partially caused in the welding surfaces, and the welding surfaces are heated by the resistance heating and arc heating of the flashing; and a latter flashing process in which the flashing is furthermore caused throughout the entire welding surfaces, and the entire welding surfaces are uniformly heated by the resistance heating and arc heating of the flashing, in which a latter flashing velocity is 2.1 mm / sec to 2.8 mm / sec in the latter flashing process.

The invention belongs to the technical field of zirconium alloy processing, and particularly relates to a Zr-Nb alloy bar material and an extruding and processing method thereof. The extruding and processing method comprises the following steps of performing pretreatment: coating a lubricating film outside a Zr-2.5Nb semi-finished material free from surface defects, so as to obtain a pretreated Zr-2.5Nb semi-finished material; performing heating: heating the pretreated Zr-2.5Nb semi-finished material to an extruding temperature, and performing temperature insulating; and performing extruding:performing extruding on the heated Zr-2.5Nb semi-finished material according to a pre-set extrusion ratio, so as to obtain the Zr-Nb alloy bar material of target specification. According to the extruding and processing method disclosed by the invention, through the extruding temperature and the extrusion ratio, Zr-Nb alloy bar material tissues are controlled; the finally-obtained Zr-Nb alloy bar material is uniform and tiny in tissue, has 10 or more grain sizes; and when the Zr-Nb alloy bar material is transplanted and applied in human bodies, non-uniform wear can be effectively reduced, and then the service life is prolonged.

The invention discloses a method for detecting the abrasion difference of cutter teeth of high-speed milling cutters under the action of vibration. The method is technically characterized by comprising the steps that firstly, the cutter tooth cutting motion speed and cutter skill contact relation under the action of vibration is built; secondly, a rear angle calculating equation under the action of vibration is calculated; thirdly, a cutter tooth friction contact point position calculating model and a cutter tooth friction contact point friction speed calculating model are constructed; fourthly, cutter tooth friction contact point positions and the cutter tooth friction contact point friction speed are analyzed, and the change rules of the cutter tooth friction contact point positions and the cutter tooth friction contact point friction speed are obtained; fifthly, an abrasion cutting test of the high-speed milling cutters is carried out; sixthly, cutting vibration signals are extracted and processed; seventhly, milling cutter abrasion cutting test data obtained in the fifth step is extracted; eighthly, the test results of the cutter tooth rear cutter face friction contact point positions and the friction contact point friction speed are obtained; and ninthly, a cutter tooth rear cutter face friction contact state model is verified. According to the method, bases are provided for relieving uneven abrasion and weakening fluctuating load excitation, and initial sample cutters are provided for efficient and high-precision cutting.

The invention discloses a coating pressure sieve, comprising a sieve body which is a hollow structure; a hollow cavity is internally provided with a sieve drum which can rotate around a central shaft;the sieve drum is arranged on the sieve body by the central shaft; a driver is arranged outside the sieve body; the output end of the driver is connected with the sieve drum; the surface of the sievedrum is provided with a spiral guide plate, the external side of which is provided with a scraper; a sieve net is arranged outside the sieve drum; the clearance between the sieve net and the sieve drum forms an internal sieve chamber; and the scraper is arranged inside the internal sieve chamber and closely contacts with the surface of the sieve net. The coating pressure sieve adopts an active type to carry out filtration operation, uses the self-power to drive the sieve drum to rotate, uses the spiral guide plate and the scraper on the sieve drum for effectively scraping and removing the grains attached to the sieve net, so as to prevent the sieve net from being blocked and to generate a downward pushing force simultaneously, thus being beneficial for the coating to flow out of the sievequickly after filtration; full sealing typed pressure sieving is adopted in the whole process, thus avoiding the coating from drying or generating air bubbles after the coating thinner is evaporated;and the coating pressure sieve is convenient for use and can effectively improve the coating quality and coating efficiency.

The invention discloses a sliding bearing of a spiral floating bushing, comprising a bearing outer ring (1), a shaft neck (2) and a floating bushing (3), wherein the floating bushing (3) is mounted between the shaft neck (2) and the bearing outer ring (1) and provided with a spiral groove (4) which is through along the radial direction. The invention can ensure that the shaft neck, a shaft hole and the floating bushing of the bearing are loaded more uniformly and worn almost at the same time to reduce uneven abrasion, can improve the floating capability of the floating bushing and the lubricating condition of the bearing, improve the load distribution of the bearing and prolong the service life of the bearing.

The invention relates to a coating pressure sieve for producing tissue paper. The coating pressure sieve comprises a cylindrical sieve mesh and a sieve drum, wherein the sieve drum and the sieve mesh are coaxially installed by a main shaft; the sieve drum comprises a top surface and a peripheral surface; a plurality of conical surfaces are arranged on the top surface; the peripheral surface is provided with a spiral guiding plate and a scraper arranged along the axis; the scraper is connected with the peripheral surface of the sieve drum by an elastic hinge; and the inner side surface of the sieve mesh is provided with a plurality of ribs which extend along the axis direction. The coating pressure sieve for producing the tissue paper adopts an active mode for filtering; the driver and the sieve drum capable of rotating with the driver are arranged, the spiral guiding plate is arranged on the sieve drum, the scraper is arranged at the outer side of the guiding plate, and in rotation, coating particles without passing through the sieve mesh can be scraped off by the scraper on the sieve drum, so that the particles can be effectively prevented from adhering or accumulating on the surface of the sieve mesh 20 and further blocking the sieve mesh, and the coating quality and the coating efficiency can be effectively improved.

The invention provides a machining electrode for annular holes and a machining method. The electrode comprises an electrode rod, a connecting rod and an electrode head, wherein one end of the connecting rod is connected with the electrode rod, the electrode head is arranged at the other end of the connecting rod, and the end of the connecting rod, which is connected with the electrode head is of a circular arc; in the machining electrode for the annular holes and the machining method, the electrode head is made of red copper material, the consumption of red copper is reduced, and the materialcost is reduced; furthermore, rough machining and fine machining share one electrode rod, so the electrode rod can be reused by replacing the electrode head, the operation is simple, and the non-uniform abrasion of the electrode is reduced; furthermore, the machining of a whole part is completed during one-time clamping, so batching of the part or secondary alignment of the electrode is avoided, the alignment time is reduced and the uniformity of the fine machining allowance is ensured.