12results about How to "Reduce casting difficulty" patented technology

A method for manufacturing a large-scale balance weight of a steel sheet pile ship lift, which simplifies the processing flow of the large-scale balance weight. The method first cuts a continuous casting steel blank into single pieces of steel sheet pile with grooves, and measures and marks the steel sheet pile. Then, two groups of steel sheet pile are assembled together by processing and pre-installing gap pads. After the preliminary assembly is completed, the balance weight is marked again, and then the locking bolt holes, pin shaft holes and lifting lug holes are drilled and processed, and the holes are counterbored. The next step is to cut and install the edge plates at the top and bottom of the grooves. The trial lifting is performed and the lifting shaft hole reinforcing plates are pre-installed to ensure the stability of the structure. The stop seat plates are further processed and installed to provide protection for the final stability. Finally, the overall performance of the balance weight is verified by the second trial lifting, and the remaining edge plates are pre-installed. The present application can realize efficient processing of large-scale steel sheet pile balance weight by using conventional general equipment.

The utility model relates to a door lock handle assembly. The door lock handle assembly comprises a pipe fitting, a casting part and a plate part, wherein the casting part and the plate part are matched with a pipe opening of the pipe fitting in shape; the casting part is embedded in a pipe opening in one end of the pipe fitting and fixedly connected with the pipe fitting. A pipe orifice at the other end of the pipe fitting is fixedly connected with the plate; the casting part comprises a cover body and at least one column body which are integrally formed, and the cover body is fixedly connected with a pipe opening in one end of the pipe fitting. The column body vertically penetrates through the surface of the cover body, and the length of the column body is smaller than that of the pipe fitting; and each column body is provided with a door handle mounting hole. The problem that no narrow groove or blind hole exists in a casting part is achieved, the casting difficulty is effectively reduced, and the casting yield is increased; the weight of the handle assembly is effectively reduced, and the material cost is effectively reduced.

The invention discloses a manufacturing method of a stacked and spliced steel plate type ship lift balancing weight. The machining process of a large complex balancing weight is simplified. The method comprises the following steps: firstly, cutting a continuous casting steel billet into a single laminated steel plate with a groove, and measuring and scribing the single laminated steel plate; and then, the two groups of overlapped and spliced steel plates are assembled together by machining and preassembling gap cushion blocks. After primary assembly is completed, secondary scribing is conducted on the balancing weight, then locking bolt holes, pin shaft holes and lifting lug holes are drilled and machined, and counter bore treatment is conducted on the locking bolt holes, the pin shaft holes and the lifting lug holes. And the next step is blanking and mounting edge sealing plates at the top and the bottom of the groove. And carrying out trial hoisting and preassembling a hoisting shaft hole reinforcing plate to ensure the structural stability. And the locking seat plate is machined and mounted, so that a guarantee is provided for final stability. And finally, the overall performance of the balancing weight is verified through secondary trial hoisting, and the remaining edge sealing plates are pre-installed. According to the method, efficient machining of the large stacked steel plate type balancing weight can be achieved by adopting conventional general equipment.

This invention provides a rolling process for eliminating noise during flaw detection of high-strength aluminum alloy sheets with low alloy content. The process employs a three-stage homogenization heat treatment: heating at 40℃ / h to 400-405℃ and holding for 3 hours; heating at 40℃ / h to 445-460℃ and holding for 10-24 hours; heating at 10℃ / h to 492-496℃ and holding for 8-24 hours; and then rolling at 420℃. The rolling process uses 9-15 passes, with the first three passes being rapid rolling and the last three passes using a large reduction (greater than 17% reduction per pass) for rapid rolling. The middle passes use a large reduction for rapid rolling, while the remaining passes use a small reduction for slow rolling. The final rolling temperature is not lower than 410℃. The thick plates obtained by this rolling process have a uniform microstructure along the thickness direction, small grain size, pass non-destructive testing, and possess high strength, plasticity, and fracture toughness.

The utility model discloses an engine air cylinder body oil return channel which comprises an air cylinder cover, an oil pan and an air cylinder body, an air cylinder cover oil return cavity is formed in the air cylinder cover, the air cylinder body is provided with an air cylinder body oil return channel in butt joint with the air cylinder cover oil return cavity, the lower end of the air cylinder body oil return channel is connected with the oil pan, and the engine air cylinder body oil return channel further comprises an oil return guide pipe. The oil return guide pipe is used for replacing an air cylinder body oil return channel, the upper end of the oil return guide pipe is connected with the air cylinder cover oil return cavity, and the lower end of the oil return guide pipe is connected with the oil pan or the air cylinder body. The utility model has the advantages of light weight, low cost and the like, and is favorable for improving the casting qualification rate of the cylinder body.

The utility model relates to the technical field of turbochargers, in particular to an integrated bearing shell structure of an axial flow turbocharger. Comprising an air compression impeller, a pressure end bearing seat, an integrated bearing shell, turbine blades and a turbine shaft, the pressure end bearing seat is fixedly connected with the integrated bearing shell and located in the integrated bearing shell, the turbine shaft is movably connected with the integrated bearing shell and located in the integrated bearing shell, and the turbine shaft is further movably connected with the pressure end bearing seat and penetrates through the pressure end bearing seat. The turbine blades are fixedly connected with the turbine shaft and located at one end of the turbine shaft, the compressor impeller is fixedly connected with the turbine shaft and located at the other end of the turbine shaft, and through the arrangement of the structure, the bearing shell can be suitable for a large-size axial flow supercharger, the reliability of the bearing shell is greatly improved, and the convenient installation requirement is met; and the casting and machining difficulty and technological procedures are reduced, and the bearing shell can be used easily.

A single-head computerized embroidery machine comprises an embroidery machine head, a shuttle box body, a main transmission mechanism, a fixing frame, an auxiliary transmission mechanism and a rack, the embroidery machine head and the shuttle box body are installed on the rack, the main transmission mechanism is connected with the embroidery machine head and the shuttle box body, the main transmission mechanism drives the embroidery mechanism and the shuttle box body to work at the same time, and the thread locking action in the embroidery process is completed. Therefore, the embroidering operation is completed; the fixed frame is detachably installed on the auxiliary transmission mechanism, the fixed frame is located between the embroidery machine head and the shuttle box body, the fixed frame is driven by the auxiliary transmission mechanism to move between the embroidery machine head and the shuttle box body, and different types of fixed frames are installed on the auxiliary transmission mechanism; therefore, the embroidery machine can conveniently embroider different parts to be embroidered.

The utility model relates to the technical field of automobiles, and discloses an engine water outlet pipe structure, an engine cooling system and an automobile, the engine water outlet pipe structure comprises a pipe body, the pipe body is provided with a plurality of water inlets, a water intake, a water return port and a water outlet, the multiple water inlets are located between the water intake and the water return port, and the water return port is located between the water intake and the water outlet. The first sealing element is used for sealing the water intake and can be detachably connected with the pipe body; the second sealing piece is used for sealing the water return opening and can be detachably connected with the pipe body; the baffle is used for separating a channel between the water inlets and the water return port in the pipe body, and the baffle is detachably connected with the pipe body. The engine water outlet pipe is simple and uniform in structure, casting difficulty is reduced, yield can be increased, weight is reduced, and production cost is reduced.

The invention belongs to the technical field of magnesium alloy preparation, and particularly relates to a ternary magnesium alloy with high plasticity and high corrosion resistance and a preparation method of the ternary magnesium alloy, and the magnesium alloy comprises the following element components in percentage by mass: 3-5% of Mn, 0.5-2% of Y and the balance of Mg and inevitable impurity elements such as Fe, Cu and Ni. The high-plasticity and high-corrosion-resistance magnesium alloy is finally obtained through smelting, casting, solid solution treatment and aging heat treatment. The method is simple in operation process, uniform in structure, fine in crystal grain, excellent in corrosion resistance and mechanical property, and theoretically has large-scale application conditions.

The utility model relates to the technical field of electric drive axles, in particular to a light truck new energy electric drive axle which comprises an axle housing, a speed reducer driven by a motor is fixed in the middle of the axle housing through bolts, the speed reducer is in gear transmission with a differential mechanism in the axle housing, and the differential mechanism is in transmission connection with hubs at the two ends of the axle housing through half shafts. A brake drum is fixed to the hub, a brake system fixed to the axle housing is sleeved with the brake drum, steel plate spring seats are arranged at the positions, with the same distance from the hub, of the two ends of the axle housing, and damping supports are arranged on the steel plate spring seats. According to the utility model, the conventional axle assembly is fully utilized, the cost for transforming an oil vehicle into an electric vehicle is reduced, the casting difficulty of the axle housing is reduced by adopting the combined axle housing, and the damping bracket is integrated to the steel plate spring seat, so that the welding damage to the axle housing is reduced, and the position of the damping bracket is convenient to adjust when a vehicle body is assembled.

The application provides an engine air intake unit structure, an air intake assembly structure and an engine. The engine air intake unit structure comprises an air intake header and a methanol injector. The air intake header comprises an air intake pipe section with open ends and a mixing pipe section in communication with the air intake pipe section. The air intake pipe section extends along a first direction, and the mixing pipe section extends along a second direction. The first direction is perpendicular to the second direction. An end of the mixing pipe section away from the air intake pipe section is used to be in butt joint with an engine cylinder head. At least two injection positions are arranged on the mixing pipe section. The methanol injectors are arranged at the injection positions. Multiple methanol injectors inject methanol into the mixing pipe section. The injection directions of the multiple methanol injectors intersect with each other in a plane perpendicular to the second direction. The technical scheme of the application integrates the methanol injectors and the air intake header into an independent unit module, avoids direct corrosion of the methanol on the cylinder head, reduces the difficulty of improvement of the cylinder head, prolongs the mixing path of the methanol and air, and improves the uniformity and optimizes the combustion by cooperating with the cross injection of the methanol injectors.

The invention relates to a double-shell multistage pump split face connecting structure which comprises an inner shell and an outer barrel arranged on the outer side of the inner shell in a sleeving mode, the outer barrel is provided with an inlet flange and an outlet flange, the outer barrel and a pump cover jointly form a sealing cavity, and the inner shell is sealed in the sealing cavity; the rotor part is arranged in the inner shell and forms a flow passage part of the pump together with the transition flow channel of the inner shell; the inner shell comprises an upper shell body and a lower shell body, and the upper shell body and the lower shell body are arranged in a central symmetry mode. An axially split flange face is arranged between the upper shell and the lower shell, and connecting devices are arranged on the two sides of the axially split flange face; the four corners of the middle opening face are each provided with a limiting mechanism. An inner shell anti-rotation positioning block is arranged on the end face of the high-pressure side of the inner shell, and an inner shell circumferential positioning block is arranged on the middle plane of the upper shell and the middle plane of the lower shell. The radial size of the inner shell is reduced, so that the radial size of the whole pump is small, and the transportation and installation space is reduced; the weight of the pump body and the cost are reduced. According to the connecting mode of the middle open face, the casting difficulty of the middle open face of the inner shell is reduced.