54results about How to "Precise processing size" patented technology

The invention provides a formwork structure for sealing of cast-in-situ stairs and a reversed concrete pouring construction method of the formwork structure. The construction method comprises steps as follows: laying of a stair plate bottom formwork, mounting of ladder beams and platform plate formworks, erection of supporting frames, binding of steel bars for the stairs, layout of split heads, mounting of outer holding plates, mounting of horizontal and longitudinal step formworks, mounting of angle steel, reinforcement through upper and lower formworks of the stairs, reinforcement through side formworks of the stairs, concrete pouring and curing and detachment and circulating use of the bottom formwork and the outer holding plates. The formwork structure and the construction method have the benefits as follows: the upper surfaces of the stair steps are sealed through the formworks, concrete can be effectively prevented from overflowing, and materials are saved; concrete pouring is performed from the bottoms to the tops of the stairs, and vibration for compaction is performed during pouring.

The invention discloses the technical field of water treatment, and particularly relates to a spacer member in an electrodialysis device. An electrodialysis spacer comprises a board frame, a water distribution flow passage, liquid guide holes and a board-core grid, wherein half of the liquid guide holes are elliptical, and half of the liquid guide holes are semi-elliptical, connected with the water distribution flow passage and communicated with the inner cavity of the board frame; the elliptical liquid guide holes are arranged at one end of the board frame; and the board-core grid is distributed in the inner cavity of the board frame. The electrodialysis spacer has the advantages that the flow capacity can be improved and the resistance is reduced in the water flow process; and the electrodialysis spacer has the characteristics of being good in elasticity, resistant to strong acid, strong base and organic solvent, easy to seal and good in leak tightness.

The invention discloses a turning clamp. The turning clamp comprises a clamp body, a locating block, a pressing mechanism and a safety screw, wherein the clamp body is provided with a hollow cavity, one end of the clamp body is fixedly connected with a flange plate, and the flange plate is used for being fixedly connected with a machine tool; the locating block is fixed into the cavity of the clamp body through a pin, a certain angle is formed between the locating block and the central axis of the clamp body, the locating block is provided with a locating and supporting surface which is matched with the outline of a workpiece to be machined, and after the workpiece is fixed into the locating and supporting surface, the central axis of a round-ring-shaped machined factor on the workpiece and a spindle of the machine tool coincide; the pressing mechanism comprises a first-direction pressing mechanism body and a second-direction pressing mechanism body, and the first-direction pressing mechanism body and the second-direction pressing mechanism body are used for locking the workpiece in the first direction and the second direction; the safety screw penetrates through the cavity of the clamp body and is fixed to the two opposite side faces, and the safety screw is used for preventing the workpiece in the cavity from disengaging and flying out. The invention further discloses a method of the turning clamp. By the adoption of the turning clamp and the method of the turning clamp, turning of the round-ring-shaped machined factor with the inclined central axis can be achieved, and the problems that at present, the structures of machined workpieces are limited, the clamping stability is poor, and potential safety hazards exist are solved.

The invention discloses a production technology of a carbon fiber composite aircraft. The production technology comprises the steps that a product drawing is determined; a latex airbag inner container and an EPS central spindle are designed according to the drawing; an aircraft manufacturing mold and an EPS central spindle manufacturing mold are designed and manufactured; the EPS central spindle and the latex airbag inner container are manufactured; forming materials are prepared; carbon yarn fabric is cut according to an arranging and stacking sheet; the shape of the aircraft is rolled on the surface of the latex airbag inner container in advance; the latex airbag inner container is placed in an aircraft forming mold, the mold is closed and fed to a furnace stage to be heated, meanwhile, air pressure is provided for the interior of the latex airbag inner container through a charging port, a product is fed to be cooed after being formed, finally, the mold is opened, and the formed aircraft is taken out; trimming and cutting are carried out; other components which cannot be integrally formed are bonded and fixed to the aircraft; and polishing and puttying are carried out on the surface of the aircraft. The latex airbag inner container is inflated with high-pressure air for pressurization, extrusion forming is achieved, and the finished carbon fiber composite aircraft with steps on the inner wall of a shell can be obtained.

The invention discloses a die for machining a powder metallurgy multi-step part. The die comprises a female die and a puncher pin die assembly. The female die comprises a female die body and a die sleeve for fixing the part. A first through hole is formed in the die sleeve. The puncher pin die assembly comprises a first puncher pin die, a second puncher pin die, a third puncher pin die, a fourth puncher pin die and a fifth puncher pin die, wherein the second puncher pin die is located above the first through hole and provided with a second through hole which the first puncher pin die is allowed to enter, the third puncher pin die is located below the first through hole and provided with a third through hole which the fourth puncher pin die is allowed to enter, and the fourth puncher pin die is provided with a fourth through hole which the fifth puncher pin die is allowed to enter. According to the die, the powder metallurgy multi-step part can be simultaneously machined and formed at a time, the machining size is precise, and the cost is reduced.

The invention discloses a 45-degree corner cutting device for a New Year picture mounting frame, and relates to the field of woodworking equipment. The 45-degree corner cutting device comprises a rack, a motor, lockable universal wheels, a workbench, a sliding guide rail, sliding blocks, limiting blocks, longitudinal ribbed plates, a belt, a saw web, a protection cover and a switch. The 45-degree corner cutting device is characterized in that blue paint is sprayed to the rack, the lockable universal wheels are arranged at the bottom of the rack, the sliding guide rail is arranged at the upper portion of the rack and connected with the rack through screws, and the sliding guide rail is provided with the sliding blocks; the workbench is located above the sliding blocks and connected with the limiting blocks, and the limiting blocks are provided with scales; and the motor is fixed in the rack through bolts. The 45-degree corner cutting device is novel in structure, convenient to operate and suitable for conducting inclined cutting on the New Year picture mounting frame, a cross-stitch frame, a photo frame, a wood strip, furniture, a plastic strip and a door frame.

The invention discloses a positioning device for a woodworker sawing machine to fast cut a batten. The positioning device comprises a fixing trough plate; connection plates are respectively arranged at two ends of the fixing trough plate; a movable positioning ruler is arranged on each connection plate; each positioning ruler is provided with a connection seat I for tightly compressing the positioning ruler onto the corresponding connection plate; each connection seat I is provided with a connection seat II; each connection seat II is provided with a trough end surface with a downward opening and clamps two side end surfaces of the corresponding connection seat I by the trough end surface; the bottom of the trough end surface of each connection seat II is provided with an edge connected with the corresponding connection plate; the initial ends of the two positioning rulers are fixed on one playwood. By the positioning device, a cutting operator can be helped to fast position and cut the batten, the machining size is accurate, the cutting quality is favorably improved, and the positioning device is particularly suitable for the cutting machining in batch, and an enterprise is helped to save production cost and improve the competitiveness.

The invention provides for a clamp for rotation milling machining of a gas compressor blade profile. The clamp for rotation milling machining of the gas compressor blade profile can solve the problems that when a common three-jaw chuck is adopted, blade clamping is not stable, and the machining size is out of tolerance. The clamp for rotation milling machining of the gas compressor blade profile comprises a rotation disk which is fixedly provided with a clamp body; a blade handle portion positioning and clamping assembly is installed on the clamp body and comprises a pressing plate and a positioning base fastened and installed on the clamp body; the positioning base is provided with a V-shaped positioning groove; one outer side end, located on the V-shaped positioning groove, of the positioning base is provided with a supporting block;, and the other outer side end is provided with a locking threaded rod; one end of the pressing plate is movably connected with the supporting block, and the other end of the pressing plate is fastened on the locking threaded rod through a locking nut; an inverted-V-shaped pressing block is arranged at the bottom of the pressing plate; and the inverted-V-shaped pressing block and the V-shaped positioning groove are right opposite to each other in an up-down manner.

The invention relates to a quick workpiece positioning and clamping device capable of adjusting the clamping force. A shaft seat is arranged at the rear end on the upper surface of a base; a guide seat is arranged on one side of the front end, and the upper surface of the other side of the front end is connected with a rear fixed baffle in an adjustable manner through a locking screw; an adjustment boss is arranged on the rear end face of the base; an adjustment screw is arranged between the adjustment boss and the rear fixed baffle; the interior of the guide seat is movably connected with a guide shaft; a distance adjustment bolt is screwed into the rear end of the guide shaft; the rear end of a clamping handle is connected with the shaft seat through a bolt and an adjustment nut; a clamping plate is arranged at the lower end of the clamping handle; an upper wedged surface and a lower wedged surface are arranged on the head contact area of the clamping plate and the distance adjustment bolt; a compression spring is arranged between the distance adjustment bolt and the guide seat. The quick workpiece positioning and clamping device can quickly position and clamp a workpiece through the clamping handle; due to the upper wedged surface and the lower wedged surface on the clamping plate of the clamping handle, fine adjustment on the positioning position and the clamping force is realized; the clamping force on the clamped workpiece can be adjusted by adjusting the position of the rear fixed baffle; the compression spring is used for eliminating an adjustment clearance and resetting the guide shaft.

The invention provides a turning technique for a long spoke portion of an integral impeller and belongs to the technical field of machine manufacturing. The turning technique comprises the following steps that firstly, a novel clamp is used for clamping a part; secondly, a rhombus cutter is used for conducting turning from inside to outside, and turning is conducted according to the processes of rough turning, primary semi-fine turning, secondary semi-fine turning and fine turning. The novel clamp used in the first step comprises a machine frame. A reversely hooking compressing block and an auxiliary supporting block are arranged on the machine frame, wherein the reversely hooking compressing block can be matched with the outer edge of the long spoke portion of the integral impeller, and the auxiliary supporting block can be matched with the spoke navel portion of the long spoke portion of the integral impeller. By the adoption of the turning technique for the long spoke portion of the integral impeller, the machined long spoke portion of the integral impeller is high in machining quality and accurate in machining size.

The invention provides a universal internal rotation machine device for engineering wheels. The universal internal rotation machine device for engineering wheels comprises a frame, a sliding block, a spinning roller mechanism, a pressing mechanism and a rotating platform are arranged in the frame, and the upper end of the sliding block is connected with an axial feeding mechanism. The lower end of the sliding block is connected with the spinning roller mechanism, and a spinning roller is arranged at the bottom of the spinning roller mechanism. A mold is fixed on the rotating platform, and the rotating platform is connected with a transmission mechanism through a main shaft. The pressing mechanism is connected with a pressing cylinder, and a workpiece is fixed in the mold through the pressing mechanism. The spinning roller mechanism is further connected with a radial feeding mechanism, and the axial feeding mechanism and the radial feeding mechanism are matched with an automatic control numerical control system to achieve feeding machining according to a product curve. The invention further provides a method for machining wheels through the universal internal rotation machine device for engineering wheels. The method specifically comprises the steps of mold fixing, feeding, spinning roller internal spinning, returning and workpiece taking and the like, unequal-thickness extension machining on engineering wheels can be completed, and the universal internal rotation machine device can be widely applied to the field of machining of rims of engineering wheels.

The invention provides a machining method for the hard surface of a screw drill and a device for achieving the method. Firstly, it is creatively designed that the shape of hard alloy bars is not square, gaps between the hard alloy bars are in a curve shape, in other words, welding lines are in a curve shape, so that most action force is decomposed to the hard alloy bars when erosion of slurry and drilling fluid occurs, and the abrasion resistance of a centering device and a TC bearing is improved. A device positioning trough plate adaptive to fast forming of the hard surface of the screw drill through the hard alloy bars is further provided, trough holes are formed in the positioning trough plate, and the shape of the trough holes is not square and is matched with that of the hard alloy bars. The positioning trough plate is used for orderly and evenly arranging the hard alloy bars as required, bonding of the mass hard alloy bars at a time is simply and easily achieved with the combination use of adhesive tape, the bonding efficiency is greatly improved, the situations that in manual operation, bonding angles are not uniform, the bonding intervals are not even are relieved, the bonding accuracy is improved, and the abrasion resistance of the hard surface of the product is effectively guaranteed and improved.

The invention relates to the technical field of valves, and more particularly relates to a quick-repair wash-free dual-valve-element shut-off valve convenient to replace. The quick-repair wash-free dual-valve-element shut-off valve convenient to replace comprises a valve body, a valve base, a primary valve element, a limit disc, a secondary valve element, a valve base sleeve, a valve cover, a packing gland, a valve rod and a valve drive mechanism, wherein when the shut-off valve is in the opening and closing states, an assembling unit formed by the primary valve element, the limit disc and thesecondary valve element vertically move, free stroke set in the primary valve element enables the position of the primary valve element to be automatically corrected under the action of the fluid pressure, the secondary valve element does not apply pushing force on the primary valve element downward after the valve elements are all closed in place, the condition that one valve element influencesthe sealing performance of the other valve element is completely avoided, and the distance between a secondary valve sealing surface and a secondary sealing surface of the valve base is larger when the shut-off valve is in a micro-open state, so that the secondary valve sealing surface and the secondary sealing surface of the valve base are not damaged by the impact of water flow, and the integrity of the secondary valve element sealing surface is guaranteed to the greatest extent. According to the quick-repair wash-free dual-valve-element shut-off valve convenient to replace, the service lifeis long, the sealing effect is good, and maintenance and replacement are convenient.

The invention belongs to the technical field of mechanical devices, and particularly relates to a machining device for a high-temperature blade. The machining device mainly solves the problems that an existing machining device is low in grinding efficiency, too quick in grinding wheel loss and high in machining cost. The machining device for the high-temperature blade is composed of a linear cutting device set, a creep grinding device set, a blade tool and a working platform. A linear cutting machine tool is arranged on the upper left portion of the working platform. A blade tool fixing frame is arranged on a working table of the linear cutting machine tool. A wire electrode is arranged in a wire winding mechanism of the linear cutting machine tool to conduct electrical discharge machining. The creep grinding device set is composed of a creep grinding machine, a working grinding wheel, a blade tool base fixing frame and a blade tool base.

The invention relates to the technical field of bearing machining, in particular to an adjustable bearing machining fixing device. The adjustable bearing machining fixing device comprises a box body,wherein fixing discs are symmetrically arranged on the left inner wall and the right inner wall of the box body; telescopic rods are connected to the fixing discs; a working box is arranged in the boxbody; hole grooves are formed in the left inner wall and the right inner wall of the working box; the telescopic rods penetrate through the hole grooves to be connected to connecting plates; a movable plate is connected to each connecting plate; the upper end of the movable plate penetrates through the upper end face of the working box to be provided with a connecting rod; a fixing clamp is connected to the connecting rod; movable teeth are arranged at the lower end of the movable plate; fixing bases are arranged in the working box; a lantern ring is arranged at the upper end of each fixing base; motors are arranged on the rear portion of the inner side of the working box; transmission shafts are rotatably connected to the motors; rotating discs are rotatably connected to the transmissionshafts; rotating teeth are uniformly distributed on the rotating discs; the problem that the device is single in machining is solved; the application range is enlarged; the sliding phenomenon of a bearing can be prevented in the machining process; and the machining size is more accurate.