104results about How to "Avoid machining" patented technology

The control valve according to the invention is for use in liquid carrying systems. It comprises a valve housing (1) having an inlet side (17) and an outlet side (18), said valve housing being provided with a pressure maintaining arrangement for maintaining a constant differential pressure between the inlet and outlet sides, as well as an amount control arrangement for setting the maximum flow amount through the valve and adjustment of it. The control arrangement comprises two cylinder shell elements (2 and 3) cooperating in the flow path, both having material removed from otherwise overlapping areas, thereby generating an uncovered area (25) in the flow path of the control valve. The outer cylinder shell element (3) is stationary rotatable relative to the valve housing, while the inner cylinder shell element (2) may be rotated by means of a rotatable handle (13), whereby a larger or smaller opening (25) between the cooperating cylinder shell elements (2 and 3) may be provided. Both cylinder shell elements (2 and 3), which cooperate with the seat hole (8) of the valve housing, may also be displaced (26) in the axial direction, resulting in an increase or a decrease of the generated opening (25). Thereby, the flow amount may be adjusted prior to the presetting, e.g. by means of an actuator.

A laser machining device machines a workpiece having a machining portion where a hole is machined and a non-machining portion positioned on an extension of the hole. The laser machining device includes a nozzle that jets a column of liquid towards the hole of the machining portion and a laser head that introduces a laser beam into the column of liquid jetted towards the hole. The workpiece is held by a holding member. A laser beam blocking member is disposed in the non-machining portion. The laser beam blocking member blocks the laser beam that passes through the hole. Furthermore, a discharge path that discharges the liquid reaching the hole is provided in the laser beam blocking member.

The invention discloses a method for preparing a Grignard reagent. In the conventional method for preparing the Grignard reagent by using magnesium powder, the magnesium content of the common magnesium ingot can reach over 99 percent; after the magnesium ingot forms the magnesium powder by cutting processing, the magnesium content of the magnesium powder is about 95 percent; 4 percent of metal magnesium is oxidized during the cutting processing; an oxidation film of the oxidized magnesium can delay the occurrence of a Grignard reaction to cause initiation difficulty; and if the dropping speed of halogenated hydrocarbon is increased, instant reaction is generated to release a great deal of reaction heat and a production accident occurs. The method for preparing the Grignard reagent is characterized in that: large-particle magnesium or magnesium ingot with nominal diameter of more than 1 mm serves a raw material; and the Grignard reaction is performed in a kettle reaction mode or an external circulation reaction mode. The large-particle magnesium or magnesium ingot serves the raw material, so the quantity of magnesium oxide in the magnesium is greatly reduced, proportion of byproducts formed by the magnesium oxide and an initiator is reduced, the quality of the Grignard regent is improved, and utilization ratio of the metal magnesium and utilization ratio of the halogenated hydrocarbon are increased.

The invention discloses a 3D printing repair method of a chain wheel. The method comprises following steps: firstly, scanning, wherein the chain wheel is scanned, and space coordinates of the chain wheel surface are obtained; secondly, model processing and code generation, wherein the space coordinates of the chain wheel surface are compared with standard space coordinates of the chain wheel surface, a three-dimensional model required to be repaired is obtained, and the three-dimensional model is sliced to generate numerical control codes; thirdly, 3D printing; wherein the initial stage is printed, power of a laser device is set to range from 1200 W to 1500 W, and after 0.5 mm to 1.5 mm is printed, the power of the laser device is set to range from 600 W to 800 W; and fourthly, aftertreatment, wherein the chain wheel obtained after 3D printing is subject to sand blasting and polishing processing. According to the repair method, the wear portion can be precisely repaired, a double-coating cladding method is adopted, it is ensured that a cladding layer and a base body are completely in metallurgical bonding, and meanwhile hardness and wear resistance of the surface of the repaired position of the chain wheel can be superior to those of a new product.

The invention discloses a plastic electric-spraying throttle valve body assembly, comprising a throttle valve body (1), a throttle valve spindle (2), a throttle valve piece (3), a torsion spring (4), a swing frame (5), a position sensor (6), a stepping motor (7), a flange plate metal insert (10), an idle screw mounting hole metal insert (11), stepping motor and position sensor mounting hole metal inserts (12), a card (14) and an idle adjusting screw (17), wherein a main channel (8) and an idle side channel (9) are arranged inside the throttle valve body (1), and a base of the throttle valve body (1) is provided with a flange plate (18). The plastic electric-spraying throttle valve body assembly has the beneficial effects that the defect of easy deformation of the main channel of the plastic throttle valve body can be effectively overcome, the fast interchange of a metal throttle valve body assembly and a plastic throttle valve body assembly in the process of assembly and after-sale maintenance of an engine is realized, and the leak problem of the side channel of the throttle valve body caused by different coefficients of thermal expansion is solved.

A process for repairing a compressor rear frame of a gas turbine engine. The process entails removing a seal flange from the inner casing wall of the frame to define an annular face on the casing wall, and fabricating a replacement flange to have an annular face with a radial width greater than the radial width of the annular face of the casing wall. The faces of the flange and wall are mated to form a joint, a penetration-enhancing flux is deposited adjacent the joint, and a single-pass gas tungsten arc welding operation is performed to form a root weldment that extends completely through the joint. The flux is then removed and a gas tungsten arc welding operation is performed to deposit a filler on the root weldment and form a second weldment that completely overlays but does not penetrate through the root weldment.

The invention relates to a method for preparing a silicon-aluminum alloy electronic packaging material by virtue of rapid injection molding. The silicon-aluminum alloy comprises the following components in percentage by weight: 10%-60% of Si and the balance of Al. The method comprises the following steps of preparing according to the components of the alloy, mixing the prepared silicon-aluminum alloy powder and a binder at a certain ratio in an internal mixer to obtain a uniform compound feedstock, carrying out injection molding on the feedstock to obtain a green body, removing the binder from the green body and sintering to obtain the silicon-aluminum alloy electronic packaging material of which the relative density is greater than 99%. The silicon-aluminum alloy material has the advantages of uniform alloy components and uniform and dense microstructures and can be prepared into the silicon-aluminum alloy electronic packaging material which has continuously adjustable thermal expansion coefficient range of (6-12)*10<-6>/K, the thermal conductivity range of 110-150W/mK and the specific gravity of 1.7-2.6g/cm<3> and complex and diversiform structure, the complicated machining processes such as lathing, milling, planing and grinding are avoided and the method has the advantages of high production efficiency, simple process, low cost, excellent product performance and the like.

A cam follower including a plunger intended to execute a reciprocating movement in an exterior body. The plunger includes a plunger body having a cylindrical exterior surface, an anti-rotation device extending radially beyond the cylindrical exterior surface of the pusher body and engaging via a matching structure in the exterior body, a roller providing the contact with a cam, and a sleeve rotatably supporting the roller in the plunger body. The plunger body includes at least one lateral bore and the sleeve is inserted in the bore. In order to avoid additional components and assembly steps to constitute the anti-rotation device, the present invention proposes to use one end of the sleeve as the anti-rotation device.

The invention relates to a thermal cutting device for chemical fabric. The device comprises a tank body, a first motor is fixedly connected to the portion, close to a first supporting column, of the bottom of an inner cavity of the tank body, and a first belt wheel is connected with the outer surface of a second belt wheel through a first belt in a sliding mode; a first gear is meshed with the outer surface of a second gear through a gear belt in a transmission mode, a pressing device is fixedly connected with the side, away from the tank body, of the bottom of a supporting plate, and a lifting device is fixedly connected with the middle of one side of the top, away from the inner cavity of the tank body, of a connection block; a horizontal mobile device is fixedly connected to the side, away from the connection block, of the lifting device, and a thermal cutting device body is fixedly connected to the side, away from the lifting device, of the horizontal mobile device. The invention relates to the technical field of chemical fabric processing. The device can process chemical fabric products of various specifications, replacement and further cutting processing are avoided, the timeis saved, the cost is lowered, wrinkles are prevented, and the situation is avoided that the phenomenon of easy silk falling-off of cutting edges of the chemical fabric happens and accordingly the processing quality is influenced.

A main machine vise has a second auxiliary vise having independently movable clamping jaws attached to it with the auxiliary vise set to one side of the main machine vise and above a supporting surface of a machine tool table on which the main machine vise is mounted. The auxiliary vise has a movable jaw that moves in a plane generally perpendicular to the tool table on which it is mounted, while the main machine vise has a movable jaw that moves in a plane parallel to the tool table or surface on which it is mounted. The auxiliary vise is mounted on a bracket that offsets the clamping jaws of the auxiliary vise from the main machine vise so that work pieces can be independently clamped in each of the vises. The auxiliary vise includes a vibration reducing stabilizer for attaching to the tool table or support.

A profiled frame, as a component of a window or door, for holding a plate-like panel supported in a circumferential frame, and comprising a profiled frame member having a profiled chamber that extends over at least a portion of the longitudinal length of the profiled frame member; molded elements to be inserted into, and positively held by, the profiled chamber; a hinge shaft for insertion through bores of the molded elements; and at least one monolithic hinge to be disposed between molded elements for mounting the profiled frame on a supporting component, wherein the hinge has a hinge bore via which the hinge can be threaded onto the hinge shaft, and wherein the hinge is fixed in position on the hinge shaft via adjoining molded elements.

The invention relates to a T-shaped valve rod, a processing method thereof and a special forging and pressing die. The valve rod is a rod-like body and comprises a head, a central polish rod part and a threaded part; a trapezoidal slot is formed in each of the left and right sides of the head, a sealing surface is formed at the junction of the head and the polish rod part, the upper and lower ends of the trapezoidal slots, the junctions of the polish rod part and the threaded part and the ends of the threaded part are arc chamfers, and the sealing surface is arc-shaped; and the upper end surface of the head is an arc-shaped convex surface. The processing method of the valve assembly sequentially comprises the steps: shearing and blanking, heating, die forging, finishing, threaded part forming and head processing. The T-shaped valve rod disclosed by the invention has the advantages of simple processing process, capability of realizing little cutting and even no cutting, reducing the cost and increasing the production efficiency of a product and low material consumption.

The invention belongs to the technical field of mechanical part design and manufacturing, and relates to a manufacturing tool for a universal double-lug-ring connecting rod, in particular to a semi-automatic welding positioner of a double-lug-ring connecting rod. A lug ring positioning assembly of an air cylinder drive is used for precisely positioning two lug rings, and a planar four-bar linkagemechanism with a dead point is used for precisely positioning and clamping a middle connecting rod; and a servo motor drives a workpiece to rotate through a gear-rack transmission mechanism, so that full-welding during rotating is performed. The semi-automatic welding positioner disclosed by the invention is efficient and intelligent, saves labor power, is small in welding seam dimension, is smallin specification of a needed machine tool, and saves materials.

The invention provides an automatic quantitative weighing device and quantitative weighing method for molten metal. The automatic quantitative weighing device for molten metal comprises a support, a balance plate, a pouring bucket, a weight storage box and a pouring bucket driving mechanism, wherein the balance plate is movably arranged on the support through a rotating shaft, the pouring bucket is movably arranged at one end of the balance plate, the weight storage box is arranged at the other end of the balance plate, and the pouring bucket driving mechanism is connected with the pouring bucket; the pouring bucket is eccentrically arranged on the balance plate through the rotating shaft, and the center of gravity of the pouring bucket is located outside the balance plate; and the pouring bucket driving mechanism comprises a positioning assembly used for limiting turning of the pouring bucket, a triggering assembly used for releasing the limiting assembly, and a metal ball circulating mechanism used in cooperation with the triggering assembly. The automatic quantitative weighing device and quantitative weighing method for molten metal have the beneficial effects that molten metal can be quantitatively weighed accurately, the working efficiency is improved, the quality of castings is improved, and materials are saved.