98results about How to "Small grinding force" patented technology

The invention provides a three-dimensional spiral line grinding method through ultrasonic vibration, which is applicable to high-efficiency precision machining of difficult-to-cut materials. Two-dimensional ultrasonic vibration is applied to a workpiece in the axial direction of a grinding wheel and in the radial direction of the grinding wheel on a common grinder by an ultrasonic transducer, so that the workpiece is in ultrasonic elliptic vibration. As the grinding direction is perpendicular to a plane of ultrasonic elliptic vibration, cutting tracks of abrasive particles relative to the workpiece are three-dimensional spiral lines. The tracks of the abrasive particles on the surface of the workpiece interfere with each other by the aid of the ultrasonic vibration in the axial direction of the grinding wheel, so that roughness is reduced. Besides, the maximum cutting depth of the abrasive particles is increased by the aid of the ultrasonic vibration in the radial direction of the grinding wheel, and the abrasive particles function in intermittent cutting, so that grinding force is reduced, and material removing rate is increased. The method can be used for improving machining surface quality, decreasing surface damage and improving production efficiency, thereby being applicable to high-efficiency precision machining of the difficult-to-cut materials.

The invention discloses a modified diamond abrasive tool and a manufacturing method of the modified diamond abrasive tool. The modified diamond abrasive tool comprises a base body and diamond abrasive materials arranged in a work area on the surface of the base body, wherein the work area on the surface of the base body is a step surface provided with a plurality of steps, each step is composed of a vertical surface and a horizontal surface, the step surfaces gradually decrease from the working direction, the horizontal surface of each step is provided with at least one installation groove used for containing the lower portions of the diamond abrasive materials, the diamond abrasive materials are embedded in the installation grooves and sequentially distributed on the step surfaces, the topmost end of each diamond abrasive material is a sharp end or an edge, the diamond abrasive material at the topmost part of the step surfaces works firstly, and after the diamond abrasive material at the topmost part of the step surfaces is blunt, the diamond abrasive materials at the other parts gradually work. The sharp end or the edge of each diamond abrasive material is the topmost end of the diamond abrasive material, so that the diamond abrasive materials are used in an optimized mode. The contacting area between the diamond abrasive materials and a machined object is reduced, the grinding force is small, machining efficiency is high, and the service life of the modified diamond abrasive tool is prolonged.

The invention discloses a diamond grinding wheel with a micro structure and a manufacturing method for the diamond grinding wheel, and relates to the technical field of ultra-precision machining. Thediamond grinding wheel can solve the problems that existing diamond grinding wheel abrasive particles limit grinding quality, and reduce grinding efficiency, a chip space of the diamond grinding wheelis small, and the like. The diamond grinding wheel utilizes a chemical vapour-phase deposition method to manufacture a diamond abrasive material layer, and the micro structure is manufactured on thediamond abrasive material layer surface. The diamond grinding wheel with the micro structure and the manufacturing method for the diamond grinding wheel disclosed by the invention can be mainly applied to the ultra-precision machining field of hard and brittle material optical surfaces.

The invention belongs to the technical field of hard and brittle material ultrasonic precision machining, and particularly relates to a rotary ultrasonic grinding machine tool. The rotary ultrasonic grinding machine tool comprises a rotary ultrasonic grinding main shaft, an ultrasonic wave power transmission device, a main shaft clamping and lifting device and a part clamping and feeding device. The rotary ultrasonic grinding main shaft comprises a grinding wheel, wherein the grinding wheel is installed at the output end of an amplitude-change pole, an amplitude-change pole flange is arranged in the middle of the amplitude-change pole and connected with the end face of a hollow sleeve, and a large-end mandrel of the amplitude-change pole stretches into the hollow sleeve and is connected with the output end face of an energy converter. A copper sheet is arranged on the energy converter, a positioning flange is arranged in the middle of the outer surface of the energy converter, the energy converter is connected with the inner surface of the hollow sleeve in a transition fit mode through the positioning flange, the hollow sleeve is installed in a support, and the tail end of the hollow sleeve is connected with an electric main shaft through a coupling. According to the rotary ultrasonic grinding machine tool, the grinding main shaft is directly driven by the electric main shaft, so that the grinding efficiency is improved, the grinding force and the grinding heat are reduced, and the part machining quality is improved.

The invention relates to an electric spark milling and mechanical grinding combined machining tool electrode, and belongs to the field of non conventional machining. The tool electrode consists of two parts, namely a metal tool electrode 1 and a grinding body 2, wherein the metal tool electrode 1 is cylindrical, and the periphery of the metal tool electrode 1 is provided with a spiral groove; thegrinding body 2 is an insulated sand-containing rubbing block; and the grinding body 2 is filled and consolidated in the spiral groove of the metal tool electrode 1, and the diameter of the grinding body 2 is the same as that of the metal tool electrode 1. When the tool electrode performs processing, the tool electrode of the invention and a workpiece are connected with two poles of a pulse powersource, and the tool electrode realizes electric spark milling and mechanical grinding combined machining for the workpiece through electric spark milling of the metal tool electrode 1 and the mechanical grinding of the grinding body 2. The electric spark milling and mechanical grinding combined machining tool electrode has the advantages of simple structure, high processing efficiency and precision, low cost, and the like.

The invention discloses a super-hard abrasive grinding wheel with a head face having abrasives in a phyllotaxis arrangement, comprising a grinding wheel basal body. The working surface of the grinding wheel basal body is provided with a plurality of abrasive particles or abrasive particle groups fitting with the biological phyllotaxis theory. The plurality of abrasive particles or abrasive particle groups are fixed on the grinding wheel basal body through a metal bonding agent. According to the biological phyllotaxis theory, the plurality of abrasive particles or abrasive particle groups forma plurality of anticlockwise leaf column line grooves and a plurality of clockwise leaf column line grooves. By means of the invention, the arrangement of the abrasive particles or the abrasive particle groups on the working surface of the grinding wheel fits with the H.Vogel model of the phyllotaxis theory so as to realize the physiographic controllability of the working surface of the grinding wheel. Nickel or nickel-cobalt alloy is adopted to serve as the bonding agent so as to fixedly bond the abrasives. The grinding wheel is capable of controlling the cutting state of the abrasive particles in a grinding region, the cooling liquid distribution and the grinding temperature distribution, and achieving lowest grinding force and specific energy consumption, lowest grinding temperature and burn, lowest abrasion of the grinding wheel, optimal work-surface surface integrity, and the like. The comprehensive grinding performance of the head face grinding of the super-hard abrasive grinding wheel is improved.

The invention discloses a diamond grinding tool of a ceramic-metallic bond and a preparation method of the grinding tool. The preparation method comprises the following steps of: firstly, preparing the ceramic-metallic bond by ball milling the following components in percentage by weight: 40 to 50 percent of silicon dioxide (SiO2), 8 to 15 percent of aluminium oxide (Al2O3), 12 to 20 percent of diboron trioxide (B2O3), 3 to 6 percent of lithium oxide (Li2O), 6 to 12 percent of sodium oxide (Na2O), 3 to 6 percent of potassium oxide (K2O), 2 to 8 percent of zinc oxide (ZnO), 1 to 10 percent of titanium (Ti) and 1 to 5 percent of aluminium (Al); secondly, mixing the ceramic-metallic bond with a diamond abrasive to obtain a mixed material, and then adding 3 to 5 mass percent of wetting agent into the mixed material to obtain a raw material of the grinding tool; and finally, carrying out hot-forming and cooling de-moulding on the raw material of the grinding tool respectively to obtain thediamond grinding tool of the ceramic-metallic bond. The diamond grinding tool of the ceramic-metallic bond provided by the invention has the advantages of the diamond grinding tool of a metallic bondand the grinding tool of a ceramic bond.

The present invention discloses one kind of plain grinding machine capable of grinding both plate and shaft and with widened application range. Structurally, the plain grinding machine includes one grinding machine body, one workbench capable of moving in X-direction, two racks set on the workbench, one fixture set on the racks for longitudinal motion for installing shaft workpiece and connected via a driving set to the power set, and one grinding set capable of moving in both Y-direction and Z-direction set over the shaft workpiece.

The invention discloses a vibration grinding steel rail grinding method, and belongs to the technical field of grinding. The method comprises the following steps that a, vibration is generated when a grinding wheel grinds a steel rail to form vibration grinding; b, a vibration generator is arranged at any position of a grinding wheel-main shaft system, and the vibration form, the vibration power, the amplitude frequency and the like are adjusted according to the grinding process requirements; and c, the vibration direction can be any direction such as the longitudinal direction, the transverse direction, the vertical direction and the inclined direction of the steel rail or the composite disordered vibration direction. According to the vibration grinding method, vibration is provided for the grinding wheel, the grinding efficiency and the feeding speed of the steel rail are improved, and the grinding depth is increased, so that the grinding efficiency is improved, the maintenance time is shortened, the grinding vibration effect is achieved, the grinding force is reduced, meanwhile, the residual stress of the grinding surface is reduced, grinding burn is avoided, the surface quality of the steel rail is improved, and the service life of the steel rail is prolonged.