87 results about "Stock removal" patented technology

The invention relates to the field of machining, in particular to a method for machining a stainless steel deep-hole thin-wall part. The method comprises the following steps that a proper blank material is selected, annealing treatment is carried out, and the cutting machining performance of the material is improved; rough turning is carried out, wherein working allowance of a blank is removed, and a workpiece inner hole is machined in dedicated equipment through a corresponding deep hole inner ejector drill; heat treatment and quenching are carried out; the appearance of a workpiece is clamped, and the end faces of the workpiece are turned; lead hole turning and chamfering are carried out; pull-boring and pull-hinging are carried out, the number of times of pull-boring and pull-hinging can be determined according to the working allowance, the number is generally two to four, pull-boring is carried out two times on a dedicated deep hole drilling and boring machine according to the characteristic of the part, after pull-boring is carried out once, the inner hole is machined with certain working allowance reserved, the inner hole is machined to the required size finally, and cooling lubricating oil is adopted in the machining process. According to the method, the precision requirement of the workpiece can be guaranteed, quality is stable and reliable, machining difficulty can be reduced, production efficiency can be improved, and the labor intensity of workers can be reduced.

A stock removal workshop for the production of a dental restoration product includes a stock removal machine operable to remove stock material from a blank such that there remains a dental product having the desired geometry requisitioned by a dental practice or a dental laboratory. A stock removal plotter controls the stock removal machine operation and converts requisition data received from the dental practice or the dental laboratory which characterizes a virtual model of the requisitioned dental product into control data for controlling the stock removal machine operation. A geometry following assembly characterizes the geometry of the produced dental product via a geometry following operation and a comparison device compares the geometry characterizing data relating to the produced dental product with the requisition data to determine deviations therebetween.

The invention discloses a surface treatment method of a piston for a quartering hammer, which comprises the following steps: raw materials are forged and pressed to form a bar stock for the piston and then isothermal annealing is conducted; rough treatment is conducted on a plain lathe and finishing allowance of 2mm is left on a circumferential surface and a scope of attack; the piston is carburized to lead the depth of a carburized layer to be up to 3mm; the circumferential surface of the piston is cut by 1.5mm on a numerically controlled lathe and the scope of attack thereof is cut by 2mm for fine treatment; the piston is quenched and tempered; and the circumferential surface of the piston is grinded, and the like. The surface treatment method of the piston for the quartering hammer firstly utilizes carbonization and then machining, and uses a more removal of the scope of attack to cause the scope of attack to become a low-carbon martensite, thereby enhancing the surface hardness of the scope of attack so as to be capable of improving the shock resistance of the scope of attack. In addition, the method for firstly conducting carbonization and then machining and finally quenching is adopted to reduce the deformation of the piston, thus being capable of greatly reducing the stock removal, and increasing the qualification rate of products.

The invention discloses an automatic panel production line. The automatic panel production line comprises a cutting device, an edge sealing device and a packaging device which are arranged in the panel machining direction, an automatic panel carrying device is arranged between each upstream machining device and the corresponding downstream machining device and comprises a panel conveyed-out area, a storage guide rail, a storage location area, a stock removal guide rail and a panel conveyed-in area; roller conveying machines are arranged in the panel conveyed-out areas and the panel conveyed-in areas respectively; a plurality of roller conveying machines are arranged in the storage location areas and are arranged to be in at least one row; two conveying trolleys are arranged on the storage guide rails and the stock removal guide rails respectively and are each provided with a traveling motor, a rotary encoder and a roller conveying machine; each roller conveying machine is provided with a drum motor, and a photoelectric sensor used for panel in-place detection is arranged at the output end of each roller conveying machine. The device further comprises a master controller which is electrically connected with drum motors, the photoelectric sensors, the traveling motors and the rotary encoders. The automatic panel production line is reasonable in design; the automatic panel carrying devices are introduced, so that the manpower is released, and the yield and the production safety performance are improved.

A kind of polishing composition is provided, the material removal rate of its silicon nitride layer is higher than the material removal rate of silicon oxide layer, has no adverse effect to polishing planarization substantially, can reach sufficient silicon nitride layer removal rate, also provides A polishing method using the composition. A polishing composition comprising silicon oxide abrasive grains, an acid additive and water, when the acid additive forms an 85% by weight aqueous solution, the chemical etching rate of a silicon nitride layer is at most 0.1 nm/hour in an atmosphere of 80°C . A particularly preferred composition is one wherein the silica abrasive particles have an average particle size of 1-50 nm and a pH of 3.5-6.5.

One of the principal objectives is to provide a loose mass of single crystalline minute diamond particles for abrasive uses, which is prepared from a coarser crystalline product of a common static ultra high-pressure process. The novel particle abrasive can achieve improvement in both machining efficiency (stock removal per time) and worked surface roughness. An effective method for its production is also provided. The diamond particles of the invention, which have a D50 average size of over 5 mum but not exceeding 40 mum, have an explicit effect of a heat treament on either crystal structure or collective properties. The particles are further deposited on the surface with non-diamond carbon, amounting 0.5% or more by weight in relation to the diamond as a whole. Such diamond particles can be effectively obtained by heating diamond particles having said D50 particle size, in a non-oxidizing environment at a treatment temperature of 600° C., in order to convert the surface of diamond particle to non-diamond carbon.

The invention discloses a method for manufacturing a bronze pipe, specifically comprising the following steps: selecting and melting raw materials; casting copper water into copper ingots; decladding the copper ingots and squeezing the copper ingots into various blank pipes; reducing one end of the blank pipe, removing oxide skins of the surface of the blank pipe; annealing the copper pipe to be softened; stretching the pipe materials to reach the requirement of customers through a frequency conversion stretcher; correcting the stretched copper pipe to the best straightness by a straightener; sawing the copper pipe into various lengths by a saw bit; removing burrs at two ends of the copper pipe; and testing to obtain finished goods. The method of manufacturing the bronze pipe provided by the invention has strong maneuverability, high efficiency, rational process design and high quality of the obtained bronze pipe.

The invention relates to a power battery self-discharge detecting and grading process. The process comprises the following steps of: carrying out capacity grading on formed batteries and recording discharge capacities as C1; carrying out high-temperature aging on the capacity graded batteries at a temperature of 40-80 DEG C for 3-7 days; carrying out capacity keeping rate test on the high-temperature aged batteries, recording the discharge capacities as C2, calculating ratios K of C2 to C1, selecting batteries with relative large self-discharge through the K and grading the other batteries, wherein the batteries, the K of which is smaller than or equal to R, are batteries with large self-discharge, namely, unqualified batteries, and the batteries, the K of which is between R and 100, are divided into N grades according to the K; and carrying out stock removal on the graded batteries according to the grades. According to the process, batteries with relatively large self-discharge can berapidly and effectively selected, and the batteries are divided into different grades during the detection, so that the grading process of module grouping sections is saved.

A turbine wheel (10) for a turbocharger includes a hub (12) extending in an axial direction between a nose (14) and a back-wall (22). The hub (12) defines an axis of rotation (28) extending in the axial direction and the back-wall (22) includes a peripheral edge (20). A plurality of turbine blades (26) is coupled to the hub (12) and is disposed in a circumferential direction generally at equal intervals around the axis of rotation (28). At least one scallop (44, 48) is formed in the peripheral edge (20) of the back-wall (22) for balancing the turbine wheel (10). The at least one scallop (44, 48) is positioned along the peripheral edge (20) such that the peripheral edge (20) is not symmetrical in the circumferential direction about the axis of rotation (28).

The invention discloses a machining method for a specially-shaped thin-wall shell body part. The machining method for the specially-shaped thin-wall shell body part comprises the steps of plate preparation, rough milling, alignment, aging treatment, finish machining for an end surface of a cavity, finish milling for a bottom surface and a shape, finish milling for the cavity, and blank removal. According to the machining method for the specially-shaped thin-wall shell body part, accurate location is carried out in a machining process through a location pin hole, the part is installed on a fixed clamp in a clamping manner to be fixed, and the effects of supporting and preventing vibration are acted by reserving a process cylinder in the cavity, so that complete machining for the specially-shaped thin-wall shell body part can be realized; and the machining method for the specially-shaped thin-wall shell body part has the advantages of facilitating to clamping, and being capable of preventing the part from being deformed, saving production for a special fixture, and increasing the machining efficiency, the machining accuracy, the production efficiency and the product qualification ratio.

A method for manufacturing a gear having a plurality of gear teeth includes the steps of: determining a desired finished gear characteristic, determining a reference feature on the gear to establish an origin on the gear, determining an unfinished dimension of a surface of at least one of the plurality of gear teeth relative to the origin, estimating a desired stock removal that will achieve the desired finished gear characteristic, finishing the gear using a finishing tool, determining a finished dimension of the surface of the at least one of the plurality of gear teeth relative to the origin, determining actual stock removal by comparing the unfinished dimension with the finished dimension, and comparing the actual stock removal with the desired stock removal.

The present invention provides a wafer polishing method and a polishing apparatus which are capable of preventing peripheral sags of a wafer due to polishing and then manufacturing the wafer, especially an SOI wafer at a high flatness level. There is provided a wafer polishing method using a polishing apparatus which comprises a rotatable table having a polishing cloth adhered thereon and a polishing head equipped with a wafer holding plate opposing to the table and in which the back surface of the wafer is held by a holding surface of the wafer holding plate and the front surface of the wafer is pressed to and polished by the polishing pad, comprising a polishing step of polishing the front surface of the wafer to a predetermined total polishing stock removal without changing the polishing apparatus, wherein the polishing step is divided into plural sub-steps and a holding position of the wafer in a subsequent sub-step is different from a holding position of the wafer in a previous sub-step.

A gear shaper machine system drives and maneuvers a hone tool to generate teeth geometry in a manner the teeth were machined prior to a hardening process. After heat treatment, the hone tool is indexed to the teeth geometry spacing of the workpiece so as to divide the stock removal evenly between the drive and coast sides. The hone tool may be driven with rotational and reciprocating synchronous teeth generating motion in which the hone tool reciprocates along the length of the teeth parallel to the centerline of the workpiece while the workpiece and hone tool rotate with synchronous motion.

The invention relates to a self-tapping and self-boring osteosynthesis screw for compressive orthopaedic surgery, characterised in that, in the bone engagement regions, at both the distal portion (A1a) and at the proximal portion (A2a), the sum of the angles defining the outer taper of the shank (f) and the taper of the crest line of the screw thread pitch (P) is higher than 45°, and in that the leading portion (i.e. the most distal one) of each thread includes a plurality of cutting edges (AR) obtained by stock removal.

The present invention is directed to a method for polishing a silicon wafer, the method comprising: polishing the silicon wafer by bringing the silicon wafer into sliding contact with a polishing pad attached to a turn table while supplying a polishing agent stored in a tank to the polishing pad; and circulating the polishing agent to recover the supplied polishing agent in the tank, wherein the silicon wafer is polished while adjusting a concentration of silicate ions contained in the polishing agent in the tank to be within a predetermined range. The present invention provides a polishing agent having a high polishing rate that enables the polishing rate to be kept constant among polishing batches, and a method for polishing a silicon wafer accurately with a target polishing stock removal or a target finishing thickness by using the polishing agent.

The invention discloses a technology for extruding a specially-shaped aluminum barrel with a square head. The technology comprises the following steps: a blanking step: selecting a square aluminum bar, and cutting the square aluminum bar into a blank according to set length and weight; a blank deburring step; a blank abrasive blasting step; a blank surface lubricating step; an extrusion molding step: putting the blank in an extrusion die, molding the blank into an extrusion for the specially-shaped barrel with the square head through a one-step extrusion technology, forming a barrel body blank, a square head blank and an ellipsoidal projection blank by the extrusion, and deflecting the central lines of the square head blank for 3.5-4.5 degrees relative to the symmetric axis of two projecting ribs on the barrel body blank; respectively overlapping a long axis and a short axis of the ellipsoidal projection blank with the two central lines of the square head blank; a finish processing step. The extruding technology has the characteristics of few procedures, short process, low cost, convenience in operation, stable product quality and great product consistency and is suitable for massive production.

The invention provides an ultra-precision shaft part electric grinding processing device and a processing technology thereof; the ultra-precision shaft part electric grinding processing device comprises a pedestal, a column, a crossbeam, a work platform, a transverse gas static pressure guide rail, a lengthwise gas static pressure guide rail, a vertical gas static pressure guide rail, a slide carriage, a slide plate, a transverse drive motor, a lengthwise drive motor, a vertical drive motor, a main shaft, a rotary table, a positive electrode, a negative electrode, a pulse power supply and a CNC control system; the processing technology comprises the four steps: procedure compiling; workpiece clamping; grinding process; dismounting the workpiece and resetting. Compared with the prior art, the ultra-precision shaft part electric grinding processing device is high in processing precision, good in antivibration energy-absorbing capability, and realizes non-contact processing between a cutter and the workpiece, thus preventing contacting problems between the cutter and the workpiece in the prior art, improving control precision of processing stock removal, realizing ultra-precision processing of superhard and crisp material, and expanding superfinishing processing scope.

The present invention discloses forming process of large conic roller blank, and belongs to the field of cold extrusion forming technology. The forming process includes the steps of: cutting the metal rod into the material sections in required size, external grinding to required size, extruding in an extruder at pressure of 200-800 tons, and pushing out the extruded large conic roller blank. The forming process is superior to turning process, and has high steel material utilization rate, high production efficiency, improved material structure and other advantages.

The invention relates to an automatic connection system used for detection of a single-phase electric energy meter broadband power carrier module. A circulation box containing the single-phase electric energy meter broadband power carrier module to be detected sequentially carries out conveying through a feeding assembly line, an unstacker, an electromagnetic shielded box, a conveying line and a stacking machine, a detection module is arranged in the electromagnetic shielded box and is used for carrying out multi-property detection on the single-phase electric energy meter broadband power carrier module, the detection frequency band of the detection module ranges from 2 MHz to 20 MHz, stock removal and automatic splitting of the whole single-phase electric energy meter broadband power carrier module can be achieved, qualified products are automatically stacked and connected with a storage system, manpower resource input in the module de-stacking and stacking process can be reduced, labor intensity is reduced, the system is suitable for batched module detection, and guarantee is provided for improving efficiency of the whole module detection system.

The invention relates to a casting method for a thermal powder ultra-supercritical valve cover. The method is characterized by arranging the positions of the casting head and pouring water ports reasonably, so that shrinkage area at the center of a casting head is guaranteed to diverge from a circular truncated cone, and partial of the circular truncated cone is exposed to be used as a cutting datum; arranging two layer pouring water ports at the positions of a cylinder and a flange respectively, so that pouring rate at the flange is increased; employing a single-tank-double-hole pouring, with a pouring temperature of 1575-1585 DEG C; adopting a covering agent for heat-preservation after the casting head is poured full; and by using a hot-knockout process and loading the poured casting head on a furnace for full annealing heat treatment. Compared with a conventional method, the method provided by the invention has the beneficial effects that 1) the casting head employs eccentric arrangement, so that shrinkage defects at the position of the circular truncated cone on the flange is solved; 2) inclusion defects caused by splash generated by too fast bottom casting speed can be prevented by arranging the two layer pouring water ports; 3) crack defects are solved thoroughly, repair welding amount is decreased, and production cost is reduced; and 4) stock removal of the casting head is reduced, labor intensity and pollution of the cutting to environment is reduced, utilization rate of the furnace is increased, and the quality of a casting member is improved.

A method for chemical mechanical polishing of a substrate includes polishing the substrate at a stock removal rate of greater than about 2.5 Angstrom/min to achieve a Ra of not greater than about 5.0 Angstrom. The substrate can be a III-V substrate or a SiC substrate. The polishing utilizes a chemical mechanical polishing slurry comprising ultra-dispersed diamonds and at least 80 wt% water.

The invention discloses a preparation method for a polyurethane polishing material by using network interpenetration. A secondary hydroxyl group and an epoxy group in polymer polyol and an epoxy resin are allowed to react with isocyanate by using an interpenetrating polymer network (IPN) method, then polishing powder is interpenetrated and filled into a polyurethane network, so pressure resistance, heat resistance and hydrolytic stability of the polyurethane polishing material can be improved, and wear resistance of a substrate material is appropriately reduced at the same time; meanwhile, since a part of organic dispersions are filled in the structure of the material, wear resistance of a polyurethane foam substrate is reduced, which enables the substrate and a polishing powder filling material to fall off synchronously, so the problems of great possibility of passivation and reduction of a stock removal rate of a polishing gasket with high wear resistance are solved.