16 results about "Adhesive wear" patented technology

The invention belongs to the technical field of drilling tools, and discloses a coating drilling tool and a machining method.The coating drilling tool comprises a drill tip part, the drill tip part comprises a front tool face and two tool end faces, the two tool end faces intersect to form a chisel edge, each tool end face comprises a first rear tool face, and the first rear tool faces intersect with the front tool face to form a main cutting edge; the drill tip part further comprises a first machining area, the first machining area is arranged on the front tool face and intersects with the main cutting edge, a first micro-texture is arranged in the first machining area, and / or the drill tip part further comprises a second machining area, the second machining area is arranged on the first rear tool face and intersects with the chisel edge and the main cutting edge, and a second micro-texture is arranged in the second machining area. A second microstructure is arranged in the second machining area. The first microtextures and the second microtextures can improve the surface roughness of the front tool face and the first rear tool face, improve the coating binding force, slow down tool abrasion, improve the cutting performance and reduce abrasive particle abrasion and bonding abrasion between interfaces.

The application discloses a high-speed current-carrying friction in-situ test system and relates to the technical field of precision instruments, which comprises a macro-micro power loading module, a constant force loading module, a current loading module, a force monitoring module and an in-situ detection module. The macro-micro power loading module controls the relative motion of the friction pair to be tested. The current loading module is used for loading current between friction amplitudes. The in-situ monitoring module comprises three in-situ monitoring means, namely acoustic emission, infrared thermal imaging and a high-speed camera. The application can support the test of high-speed current-carrying friction conditions such as multi-angle and multi-posture macro-micro-motion-static coupling, and can simultaneously acquire time sequence information of temperature fields, optics, acoustics and vibration, and further acquire time sequence information of thermal energy, arc intensity, adhesive wear degree, fatigue wear degree and deformation energy of the friction pair, which helps to deeply understand the failure mechanism and modification mechanism of high-speed multi-condition current-carrying friction amplitude and accelerates the optimization work of the current-carrying friction performance of the current-carrying friction pair.

The invention discloses alloy powder for repairing an H13 steel piercing needle and a repairing method of the alloy powder, and belongs to the technical field of extrusion die repairing. The alloy powder is a Co-based high-temperature alloy and comprises the following components in percentage by mass: 45.0 to 50.0 percent of Co, 15.0 to 20.0 percent of Cr, 26.0 to 29.0 percent of Mo, 0.1 to 0.3 percent of Ni, 2.0 to 4.0 percent of Si, 1.0 to 3.0 percent of B and 0.05 to 0.1 percent of C. During repairing, firstly, the surface of the perforating needle is pretreated, then the GH4169 alloy transition layer and the Co-based alloy functional layer are sequentially cladded through the laser cladding technology, and a hard-soft-hard three-layer gradient structure is formed. Through special alloy component design and gradient structure innovation, cracking of a repairing layer is effectively restrained, high-strength metallurgical bonding of the repairing layer and a base body is achieved, the repaired perforating needle has excellent high-temperature resistance, adhesive wear resistance and deformation resistance, the service life of the perforating needle is remarkably prolonged, and the repairing cost is reduced. The method is suitable for repairing and strengthening the copper alloy extrusion die.

The invention discloses a nano alternating coherent growth composite coating special for honeycomb composite material processing and a preparation method thereof. The nano alternating coherent growth composite coating sequentially comprises an AlTiSiN / ZrN alternating layer, an AlTiSiN functional layer and a TiAlN transition layer from outside to inside. The mismatch degree mismatch value between the ZrN layer and the AlTiSiN layer is delta < lt >; the formed AlTiSiN / ZrN alternating layer coating has the characteristics of high surface toughness, excellent adhesion resistance and excellent wear resistance; the TiAlN transition layer is deposited in a gradient mode, the coating structure is in continuous gradient transition through gradient target current, matrix bias voltage and gas flow, the residual stress of the coating is low, and the bonding strength is high; the high Al and Zr elements are doped in the coating, the oxidation resistance of the coating can be guaranteed, the friction coefficient of the coating can be reduced, in the honeycomb composite material cutting process, adhesive abrasion is reduced, the TiAlN transition layer and the AlTiSiN functional layer which are of a compact continuous gradual change structure serve as supports of the multiple nanometer alternating layers AlTiSiN / ZrN, and therefore the honeycomb composite material cutting performance is improved. And the bonding strength, fracture toughness, wear resistance and oxidation resistance of the coating are improved, so that the service life of the cutter is prolonged.

This application provides a control method for a stick-slip piezoelectric actuator throughout its entire lifecycle, comprising: obtaining a contact force reference value using the equation of the driving characteristic surface; acquiring contact force data from a database; calculating a contact force compensation value and converting it into a compensation voltage for the vertical piezoelectric stack; acquiring step displacement and actual contact force data; obtaining the total wear volume using the Archard adhesive wear model based on the step displacement and voltage data of the vertical piezoelectric stack; proportionally allocating the total wear volume to the slider and driving foot using a wear distribution method based on material hardness; storing the obtained slider wear data, driving foot wear data, and actual contact force data in a contact force database; and predicting contact force data for non-cyclic working ranges based on slider wear data and driving foot wear data within the cyclic working range, and storing this prediction in the database. This method can effectively improve the driving stability of the stick-slip piezoelectric actuator throughout its entire working stroke and lifecycle.

An end face anti-sticking torque sucker rod comprises a rod body, rod heads, couplings, threaded portions and shoulders, the rod heads are arranged at the two ends of the rod body, the couplings are connected to the rod heads in a screwed mode, the threaded portions are arranged in the couplings, and the shoulders are arranged at the positions, close to the rod heads, of the rod body. The torque sucker rod has the advantages that adhesion abrasion of the contact surface is reduced, abrasion of the end surface is reduced, the service life of the torque sucker rod is prolonged, the reliability of rod-column connection is improved, the end surface of the external thread shoulder of the torque sucker rod is hardened, a phosphating film on the end surface of the coupling is removed, and the adhesion abrasion of the contact surface can be reduced.

The application discloses a kind of oxidized coal pitch nanocarbon material modified water-related polymer friction pair materials and preparation method, belong to polymer material technical field.The water-related polymer friction pair material of the present application is made of soluble oxidized pitch nanomaterial of formic acid / hydrogen peroxide oxidation system oxidation coal pitch and ultra-high molecular weight polyethylene matrix.The present application utilizes the gap of polymer molecular chain of soluble oxidized pitch nanomaterial of ultra-small structure, and plastic rheology and adhesive wear of material are reduced in friction process by steric hindrance and interface anchoring effect;Combination of the "nanometer reinforcing network" formed by uniform dispersion can effectively transfer friction stress, avoid the matrix cracking caused by local stress concentration;While the nanometer size of soluble oxidized pitch nanomaterial and carbon-based characteristics give it unique dynamic lubrication function, its surface abundant functional groups can form high density, strong adhesion transfer film, significantly improve the wear resistance and service life of composite material.

Provided is a ball screw in which the occurrence of adhesive wear can be reduced and stable driving can be maintained even in severe environments for lubricating, such as an underwater environment or an environment constantly exposed to water. The ball screw includes: a stainless steel screw shaft (21) having an outer circumferential screw groove (21a) formed in the outer circumferential surface; a stainless steel nut (22) having an inner circumferential screw groove (22a) formed in the inner circumferential surface; a plurality of balls (23) accommodated in a rolling path formed with the outer circumferential screw groove (21a) and the inner circumferential screw groove (22a); and a circulation part for circulating the plurality of balls (23) in the rolling path. The plurality of balls (23) includes a plurality of load balls (23a) and spacer balls (23b) disposed between adjacent load balls (23a). The load balls (23a) are made of ceramic. The spacer balls (23b) are made of stainless steel having a hardness lower than the material constituting the load balls. The diameter of the spacer balls (23b) is smaller than the diameter of the load balls (23a).

The invention discloses a high-wear-resistance copper-based friction material for urban light rails and a preparation method of the high-wear-resistance copper-based friction material, and belongs to the field of metal-based friction materials. The basic composition of the friction material is Ni, Cu and V metal elements, the atomic percent of Ni is 31%-48%, the atomic percent of Cu is 27%-63%, and the atomic percent of V is 6%-24%. The preparation method comprises the following steps: melting all the components into a whole through a vacuum argon arc melting technology, uniformly annealing in a vacuum annealing furnace at 1200 DEG C for 432 hours, and quenching in water to obtain the required copper-based friction material. Compared with the prior art, the prepared copper-based friction material has the following advantages that (1) the Ni-Cu solid solution formed in the material can effectively improve the strength and plasticity of the material; (2) the V element in solid solution in the Ni-Cu matrix can refine material grains due to the existence of a pinning effect, so that the strength and the toughness of the material are further improved; and the V element can form V2O5 under the conditions of high temperature generated by friction and exposure to air, can be used as a wear-resistant phase, and can act together with a Ni-Cu matrix, so that the adhesive wear is reduced, and the wear rate is remarkably reduced. And (3) raw materials are easy to obtain, preparation is convenient, and the copper-based friction material has good application potential in the field of copper-based friction materials for urban light rails.

This invention belongs to the field of control valve technology and discloses a control valve for an aircraft bleed air precooler that resists airflow impact. It includes a controller, a guide valve body mounted on the controller, and a valve core assembly disposed inside the guide valve body. This invention achieves a sealing effect by using a valve core body with an outer diameter smaller than the inner diameter of the guide valve body and compressing the support clip. This avoids long-term metal-to-metal friction between the valve core body and the guide valve body, preventing the gradual occurrence of adhesive wear, abrasive wear, and other combined wear phenomena. Furthermore, it prevents multiple failures caused by wear exceeding the allowable tolerance range over service life. It also avoids incomplete closure due to deterioration of the geometric sealing surface tolerances, which could lead to increased internal leakage. This ensures pressure regulation accuracy, prevents chain reactions such as system pressure oscillations or control failures, improves the service life of the control valve, and guarantees system stability and safety.

This application belongs to the field of wear-resistant and anti-corrosion coating technology, specifically relating to a wear-resistant, friction-reducing, and corrosion-resistant coating, its preparation method, and its application. The wear-resistant, friction-reducing, and corrosion-resistant coating of this application comprises a support layer with gradient porosity, a composite functional layer, a metal layer, a chromium nitride layer, and a diamond-like carbon layer, sequentially stacked. The support layer with gradient porosity is in contact with the substrate, and the porosity of the support layer gradually decreases from the contact surface between the support layer and the substrate to the contact surface between the support layer and the composite functional layer. The composite functional layer comprises Cr3C2-NiCr and NiCrSiB. The beneficial effects of this application include: the wear-resistant, friction-reducing, and corrosion-resistant coating of this application can not only prevent common abrasive wear and adhesive wear, but also prevent impact fatigue wear, three-body wear, and electrochemical corrosion, and has a self-lubricating effect that reduces the coefficient of friction, significantly improving the operating performance and service life of this structure.

According to an aspect of the disclosure a tool steel consists of, in % weight: C: 0.8 – 1.5%, Si: 1.1 – 2.3%, Cr: 6 – 10%, Mo: 0.5 - 4%, Al: 1.1 – 2.3%, Ni: 0.6 – 2.3%, and optionally one or more of Co: < 3%, Mn: < 0.8%, V: < 0.8%, Ti: < 0.3%, Nb: < 0.3%, Cu: < 0.3%, W: < 0.3%, the balance being Fe and incidental impurities.

The invention discloses a sulfur nitrocarburizing process method for surface treatment of a cylinder body and a plunger, which comprises the following steps: S1, cleaning the cylinder body or the plunger to clean up oil dirt; s2, the cylinder body or the plunger is put into a preheating furnace to be preheated; s3, the cylinder body or the plunger is subjected to salt bath nitriding treatment to form a sulfur-nitrogen carbide layer; s4, the cylinder body or the plunger is subjected to salt bath oxidation treatment, so that an oxidation layer is formed on the surface of the cylinder body or the plunger; and S5, the cylinder body or the plunger is cleaned. By adopting the process method to treat the cylinder body and the plunger, the surface microstructures of the cylinder body and the plunger are more uniform and continuous, and the sulfur-nitrogen carbide layer and the nitrogen-carbon compound layer are formed on the surfaces of the cylinder body and the plunger, so that the wear resistance, the fatigue resistance, the lubricating property and the seizure resistance of the cylinder body and the plunger are remarkably improved, and the adhesive wear resistance is enhanced; the stress between the cylinder body and the plunger is more uniform, the friction coefficient of the surfaces of the cylinder body and the plunger is reduced, and the phenomenon that the cylinder body and the plunger are strained and stuck can be avoided.

The invention discloses a toothless eccentric single planet wheel driven diaphragm pump, which belongs to the technical field of diaphragm pumps, and comprises a pump body, a driving system is arranged in the pump body, the driving system comprises a driving shaft, at least one main roller and a steel ring, the main roller is sleeved on the periphery of the driving shaft, and the steel ring is sleeved on the main roller. The central axis of the main pin roller is parallel to the central axis of the driving shaft but has an eccentric distance, the steel ring is sleeved on the periphery of the main pin roller, and the inner wall surface of the steel ring is contacted with the outer cylindrical surface of the main pin roller; the elastic body acts on the periphery of the steel ring; a traditional gear, a cam or a crank connecting rod mechanism is omitted, the structure is greatly simplified, pure rolling friction transmission efficiency is high, abrasion is small, the problems of tooth surface abrasion, pitting corrosion and adhesion abrasion of a sliding friction pair in traditional meshing transmission are theoretically solved, the service life of transmission parts is prolonged, and further, the transmission mode is stable in operation, small in impact and high in reliability. And vibration and noise of the whole pump are greatly reduced.

This invention discloses a method, system, and apparatus for calculating the wear characteristics of a spring-storage seal ring, comprising: S1: establishing a hybrid lubrication numerical model of the spring-storage seal to obtain a hybrid lubrication factor; S2: deforming a simple adhesive wear model based on the hybrid lubrication factor to obtain a wear calculation formula suitable for the spring-storage seal ring; S3: establishing a finite element model of the seal ring and the liquid slip ring based on the wear calculation formula, the geometric parameters and material properties of the spring-storage seal ring; S4: simulating the finite element model and plotting a wear displacement trend diagram; S5: analyzing the failure performance of the seal ring based on the wear displacement trend diagram and evaluation criteria to obtain the wear resistance performance level of the seal ring. This method for calculating the wear characteristics of a spring-storage seal ring achieves a closed-loop analysis from theoretical modeling to simulation verification, overcoming the problem that traditional empirical methods are difficult to accurately predict the wear behavior of seal rings under complex working conditions.

This application provides a compressor and a refrigeration device, relating to the field of compressor technology. The compressor includes: a cylinder with a compression chamber formed within it, and a vane groove on the cylinder; a piston disposed in the compression chamber; a first hinge portion on the outer circumferential surface of the piston; a vane slidably disposed within the vane groove; a second hinge portion at one end of the vane extending into the compression chamber and hinged to the first hinge portion; the second hinge portion having a second contact surface for contacting the first hinge portion, and the first hinge portion having a first contact surface for contacting the second contact surface; wherein the ratio of the hardness of the first contact surface to the hardness of the second contact surface is in the range of 0.28 to 0.63. This suppresses adhesive wear and controls uneven wear damage, thereby transforming the wear mode between the vane and the piston into uniform, slow, benign wear, thus improving the reliability and lifespan of the compressor and improving its operating conditions.