49results about How to "Reduce machining time" patented technology

A method of constructing a preform for use in forming a machined structural assembly is provided. The method includes determining the dimensions of the machined structural assembly. First and second structural members are selected based on the predetermined dimensions of the machined structural assembly. The first structural member is positioned adjacent the second structural member so as to define at least two contact surfaces. The contact surfaces of the first and second structural members are friction welded to construct the preform such that the preform has dimensions approximating the dimensions of the machined structural assembly to thereby reduce material waste when forming the machined structural assembly. A machined structural assembly having predetermined dimensions is formed from the preform by machining away excess material.

Method of grinding a concentrically clamped crankshaft, a crankshaft grinding machine for carrying out the method, and a crankshaft of high-alloy steel or cast material. The method provides for pin journals and main journals of the crankshaft to be ground in one set-up such that first, at least the main journals are rough-ground and then the pin journals are finish-ground and after that the main journals are finish-ground. The crankshaft grinding machine forms a machining center by means of which corresponding rough-grinding and finish-grinding is possible in a single set-up.

The invention relates to a method for a welding cut surface joint formed by assembling cut surface ports, in particular to a method for welding a cut surface butt joint formed by thin welding base materials in nuclear power engineering, and aims to solve the problems that the machining period of tubes and welding period are relatively long, the welding cost is high, and part of the materials are not completely welded in the prior art. According to the method, the thickness of each welding base material is less than or equal to 6.0mm. The method comprises the following steps of: selecting protective gas and a tungsten electrode; assembling craters; overlapping an ultrasonic electrical signal on pulse welding current to generate a stable ultrasonic- tungsten inert gas (TIG) combined weld electric arc by taking ultrasonic waves and TIG combined electric arc welding machine as a welding power supply of automatic welding equipment, and performing backing welding on the surface butt joints without feeding wires; performing cosmetic welding, and finishing welding. By the welding method, the processing step of forming a groove is eliminated, so that the welding workload, the consumption of welding filling materials and the welding cost are reduced, and the welding efficiency is improved.

The invention provides a device and a method for controlling an exhalation valve, the device for controlling the exhalation valve comprises: a film disk (9); an electromagnetic valve which is positioned at first side of the film disk (9); a first exhaust chamber (11) and an air inlet chamber (10), which are positioned at second side of the film disk (9), and the film disk (9) can selectively block off the air inlet chamber (10) and a channel between the first exhaust chamber (11) and the air inlet chamber (10) by a valve rod (2) of the electromagnetic valve. The method for controlling the exhalation valve comprises that: the electromagnetic valve is controlled to lead the film disk (9) to move towards the direction of an electromagnet under the input pressure function of the air inlet chamber (10); the input air flow of the air inlet chamber (10) is exhausted from the first exhaust chamber (11) from an air flow channel; the air flow is controlled to be directly flowed into an air containing chamber of the exhalation valve, thus pushing an exhalation valve body of the exhalation valve to block off an exhalation chamber of the exhalation valve. The device has fast response time and high control precision.

The invention discloses a multi-wire (solid or flux-cored) bead welding system adopting an inert gas protection or submerged arc method, and a process of the multi-wire bead welding system. The multi-wire bead welding system and the process of the multi-wire bead welding system are used for replacing surfacing with band-electrode to obtainer higher production efficiency. The multi-wire bead welding system comprises a welding gun swing mechanism (11), a multi-wire welding gun (6), a wire-feeding pipe (4) and at least two wire-feeding machines (5). Compared with traditional bead welding, the multi-wire bead welding is higher in deposition rate. Due to the fact that a lap joint area of multi-wire bead welding is soother than that of traditional bead welding, the machining time needed to obtain a smooth surface is largely shortened. A machine head of the multi-wire bead welding system can swing in the welding process, the fusion ratio between bead welding materials and wood is improved while a wider weld joint is obtained, and the unique swing function can guarantee a bead welding layer to be more uniform.

The invention relates to an electronic beam welding method of a sealing thin-wall aluminium alloy frame, which comprises the following steps that: a, before a cover board and the upper opening of a cavity are welded, a circular table is firstly added around the opening of the cavity, and the cover board is assembled in the circuit table in an interference fit way; b, during welding, welding parameters are adjusted, then, positioned welding of positioned welding points is carried out along the interval of 5-10mm of a welding seam, during the positioned welding, the mode of firstly temporarily welding shot welding seams and then temporarily welding long welding seams is taken as a principle; and c, during electronic beam welding, a circle of welding is carried out clockwise or anticlockwise along the welding seams from the positioned welding points of a short side, and scanning welding is added in the electronic beam welding parameters, the welding seams which are subject to butt welding are subject to secondary modified welding so as to reduce welding defects. The invention has the beneficial effects that the purposes of reducing welding deformation quantity and shortening following mechanical processing time are realized; and by carrying out modified welding to the welding area, the quality of the welding seams is improved, the intergranular structure of the heat influence area is improved, the skeleton strength of the sealing thin-wall aluminium alloy frame is ensured, and the production efficiency is greatly improved.

The invention discloses a metallic material and a method for forming same. The invention solves the technical problem of enhancing the shock resistance and the abrasion resistance of the metallic material and lowering cost. The metallic material disclosed by the invention is made from the following materials in percentage by mass: 0.5-2.1% of C, 0.2-0.9% of Si, 0.69-3.3% of Mn, 0.015-0.05% of S, 0.015-0.05% of P, 0.8-4.6% of Cr, 0.6-3.8% of W, 0.6-6% of Ni, 0.69-1.5% of Mo, 0.05-0.8% of Co, 0.3-2.8% of Cu and the rest percent of Fe. Forming is casting; and demolding of the metallic material is realized by being put in heat-preserving medium or a heat-preserving box body for cooling to room temperature and annealing. Compared with the prior art, the metallic material is once formed by casting without quenching or nitriding, thus the shock resistance and the abrasion resistance of the metallic material are enhanced, the time for mechanically machining of metallic parts or dies is saved and the manufacturing cost is lowered.

An electrode is provided for use in a plasma arc torch. The electrode includes a body having an elongated forward portion and a ring-shaped aft portion. The forward portion is configured to provide an electrically conductive path from the distal end to the proximal end. The forward portion comprises a first conductive material. The ring-shaped aft portion, defining a hollow center, is configured to substantially surround a portion of the forward portion when the forward portion is located inside of the hollow center. The aft portion includes a pneumatic reaction region for receiving a biasing flow of a pressurized gas. The aft portion comprises a second material. In some embodiments, the first conductive material is the same as the second material.

A mold device and a method of manufacturing a cylinder block. The mold device comprises a split core having two first split cores formed so that the tip parts thereof may be in a tapering shape, two second split cores installed between the first spilt cores, and an inner core is installed at the center part and pushing out the first split cores in the direction receding from the center axis thereof. When the inner core is pushed out to push out and position the first spilt cores, both end parts of the second split cores are brought into contact with the tip parts of the adjacent first split cores, and the outer side-faces of the first split cores and the outer side-faces of the second split cores form a cylindrical shape. When the inner core is raised, the first split cores and the second split cores are pulled to the axial center by first engagement pieces and second engagement pieces.

A machining apparatus and method of machining a work piece are provided. The method generally includes machining a plurality of independent surfaces of the work piece as the work piece travels along a work path and through a plurality of machining stations in a single pass. The machining apparatus includes a frame and first and second machining stations mounted to the frame. Each machining station is configured to form an independent surface in a work piece passed through the machining apparatus. The machining apparatus also includes a feed arrangement for feeding the work piece through the apparatus along a feed path and relative to the first and second machining stations and the frame while machining is performed on the work piece.

A tool changing unit moves between a magazine position and a changing position to transfer a tool. A machine tool has a plurality of tool changing positions. One of the tool changing positions is selected in advance for changing the tools next time. The tool changing unit and the tool mounted on a tool spindle move to the selected changing position for changing the tools in the selected changing position. Accordingly, the tool changing unit and the tool spindle move respective short distances for changing the tools, thereby shortening the non-machining time of a machine tool combined with the automatic tool changer.

An arithmetic processing unit divides a modified NC program into a plurality of segments and determines a machining time estimation target segment among the plurality of divided segments. When estimating the machining time required for the machining of a machine tool controlled based on the modified NC program, the arithmetic processing unit shortens the time required for the machining time estimation process by reutilizing an estimated machining time for an NC program before modification with respect to segments other than the machining time estimation target segment.

In an apparatus for multiple-bearing grinding of workpieces, such as crankshafts, wherein a support element seat occurs at a bearing point at the same time as the grinding of the main bearing, a grinding-supporting unit is used that contains a grinding spindle head having at least one grinding disk and support elements in the form of support jaws or support bodies that can be swiveled in. After the support point seat is ground, the support elements are brought into contact there-with and support the workpiece during the further machining. The simultaneous grinding of the support point seat and several, bearing points results in a reduction in the machining time in the grinding of the workpiece compared to the prior art.

The invention discloses a novel method for stamping a back door avoiding part at the rear part of a car top cover product, and belongs to the field of automobile accessory machining. The method sequentially comprises the steps of OP10 drawing, OP20 trimming and punching side shaping, OP30 trimming and punching flanging shaping and OP40 trimming and punching side punching side flanging. According to the method, due to the fact that the shape is increased at the position of the drawing die male die in the side shaping area, so that the length of the shaping area line is improved so that the sideshaping required material can be stored enough for the OP20 side shaping area, the problems of dark cracking, slippage and wrinkling in the side shaping step are solved, and the die debugging time isshortened, so that the cost of the whole product in the die development stage is reduced; during mass production, the probability of unqualified products can be effectively avoided, and the generatedeconomic benefits are not neglected. The competitiveness of an enterprise in market economy is improved when the market competition is fierce; and the method is simple, practical, stable, reliable, and is convenient to popularize.

The invention discloses a production process for evaporative pattern centrifugal casting. The production process comprises the following steps of S1, designing of a pouring gate; S2, designing of a riser; S3, a box loading (manufacturing) process; and S4, a pouring process. Meanwhile, a space with the size reduced due to solidification is filled with molten metal under the action of centrifugal force, and the feeding effect is good; meanwhile, a large number of crystal nuclei are generated through fracture of regrowth dendritic crystals under the action of the centrifugal force and exciting force, crystal grains are refined, and the density of a product is further improved; and the molten metal in the pouring gate and the riser (a slag collecting riser or a feeding riser) moves towards theinterior of a casting model under the action of the centrifugal force, the utilization rate of the molten metal is increased, the yield of centrifugal casting is also increased, and the machining amount of a centrifugal casting machine is reduced.

A gas turbine ring segment for a gas turbine. The gas turbine ring segment includes an impingement target wall having an impingement target surface formed in one side, in a direction of a main cavity, and a hot side surface formed on the other side, in which the main cavity is located in a central portion in an axial direction. Cooling holes allowing an inside to communicate with an outside are arranged along the outer circumferential surface at predetermined distances from each other, each of the cooling holes having a straight structure communicating with the main cavity located in the central portion in the axial direction. This configuration consequently omits the structure comprised of a plurality of cooling holes, which has been necessary in the related art, such that the ceramic core that has been necessarily used during machining is unnecessary, thereby significantly reducing machining time and costs.

A gear machining apparatus includes a machining tool having a plurality of protruding tool edges on an outer periphery of the machining tool, and driving apparatuses that form a tooth on a work piece by rotating the machining tool around a central axis thereof, rotating the work piece W around a central axis thereof, and moving the machining tool relative to the work piece. Radial outer faces of the protruding tool edges form multiple steps that are parallel to the central axis of the machining tool such that the diameter of the machining tool increases in a stepwise manner from a tool leading end toward a tool base end of the machining tool.