162results about How to "Guaranteed dimensional accuracy" patented technology

The utility model discloses an anti-deformation bearing thin-wall part machining supporting and fixing structure which comprises a base and a supporting assembly, a machining table is connected to the top of the base, clamping blocks are arranged on the two sides of the top of the machining table, and the supporting assembly is arranged in the machining table and comprises a bevel gear ring and a plurality of bevel gears meshed with the bevel gear ring. A lead screw is arranged in the machining table through a plurality of rotating frames, the surface of the lead screw is in transmission connection with a supporting plate through a lead screw nut, the supporting and fixing structure is provided with a supporting assembly, a driving motor drives a bevel gear ring to rotate, a plurality of bevel gears rotate synchronously, then the lead screw is driven to rotate, and the supporting plate ascends to support the interior of the thin-wall part; by means of the internal supporting mode, pressure and friction force borne by the inner wall of the thin-wall part during polishing can be effectively dispersed, deformation caused by lack of supporting is avoided, the size precision, the shape precision and the surface quality of the bearing thin-wall part are guaranteed, the product percent of pass is increased, and waste products are reduced.

The invention discloses an automatic material nail removing device for a groove type commutator and a using method, and the device comprises a machine table, a main shaft box is arranged on the upper side of the machine table, a feeding sliding table module is installed on the opposite side of the main shaft box, a commutator feeding vibration disc is installed on the front side of the machine table, and a commutator conveying line assembly in butt joint with the commutator feeding vibration disc is installed on the machine table; a feeding manipulator module and a discharging module which synchronously and transversely move are arranged on the feeding sliding table module in a driving mode, an XY-axis bidirectional sliding table assembly is installed on the rear side of the machine table, a cutting tool is installed on the XY-axis bidirectional sliding table assembly, and a material receiving component corresponding to the discharging module is arranged on the side portion of the spindle box. An unloading conveying belt is mounted on the machine table below the receiving part; and the feeding manipulator module is used for putting a groove-shaped commutator on the commutator conveying line assembly into a main shaft chuck on the main shaft box. According to the invention, various technical problems generated by adopting a manual processing mode at present can be solved.

This utility model discloses a self-locking intermediate tensioning device for installing bridge housing parts, relating to the technical field of workpiece processing auxiliary devices. It includes a worktable, fixed seats, a fixed frame, fixed plates, a tensioning mechanism, and a fixing mechanism. Two symmetrically distributed fixed seats are fixedly connected to the upper surface of the worktable, and a fixed frame is fixedly connected between the two fixed seats. Two symmetrically distributed fixed plates are fixedly connected to the inner end face of the fixed frame. The fixed plates are fixedly connected to the upper surface of the worktable, and a tensioning mechanism is provided between the two fixed plates. The tensioning mechanism includes a hydraulic cylinder, a wedge-shaped tensioning plate, a moving block, and a central tensioning plate. This utility model features a tensioning mechanism where the hydraulic cylinder drives the wedge-shaped tensioning plate. Through the guidance of the T-shaped groove and the T-shaped plate, the vertical movement is converted into the horizontal expansion of the moving block and the central tensioning plate, thereby applying an adjustable tensioning force to the inner hole of the workpiece. This effectively ensures the dimensional stability and accuracy of the workpiece during subsequent processing such as press-fitting.

The utility model discloses a boring tool for an inner spherical surface of a flange hole, and belongs to the field of machining. A boring tool for the inner spherical surface of a flange hole comprises a boring tool rod and a molded surface boring tool. The boring cutter rod comprises a conical boring cutter rod handle and a rotary cutter rod connected with the boring cutter rod handle, a screw hole matched with the blind rivet is formed in the end of the boring cutter rod handle, a square hole used for installing the molded surface boring cutter is formed in the rotary cutter rod, a bolt used for fastening the molded surface boring cutter is arranged on one side of the square hole, and a threaded hole matched with the threaded hole is formed in the other side of the square hole. The profile boring cutter is specially designed in structure according to the inner spherical surface of a flange hole. Complex machining of the inner spherical surface of the flange hole can be completed at a time, multi-procedure errors are avoided, the size and shape precision is guaranteed, the requirement of a drawing is met, traditional step-by-step machining can be replaced, the tool changing frequency and the clamping time are reduced, efficiency is greatly improved, and production cost is reduced.

This application provides a fixture and method for clamping and machining thin-walled welded parts, relating to the field of fixture and tooling technology. The fixture includes a base mechanism, a central positioning mechanism, an angular positioning structure, an auxiliary support mechanism, and a clamping mechanism. The base mechanism uses a disc and multiple circumferentially arranged elongated plates to form a support surface; the central positioning mechanism mates with the positioning inner hole of the part to achieve central positioning; the angular positioning structure mates with the angular hole of the part to achieve angular positioning; the auxiliary support mechanism is set for each lug to be machined, using V-shaped supports and lateral limiting components to provide auxiliary support and limit the lugs to be machined; the clamping mechanism clamps the part to the clamping reference surface. This solution can improve the clamping stability, positioning accuracy, and local rigidity during machining of thin-walled welded parts, reduce vibration and lateral displacement of the lugs to be machined, and reduce the risk of cracking at the weld joint.

This invention belongs to the field of aerospace structural component manufacturing technology, specifically relating to an arc-shaped cap and its integrated bending forming method and application. The integrated bending forming method includes the following steps: S1, blanking to obtain a cap plate blank or cap frame blank; S2, milling to machine the external dimensions and hole positions before bending, obtaining a flat, non-arc semi-finished product; S3, bending, placing the flat semi-finished product between the punch and die of a bending die, and applying pressure to press it into an arc-shaped part with a predetermined curvature; S4, stress-relieving treatment of the bent arc-shaped part to eliminate its internal residual stress; S5, shaping, bending and shaping again to stabilize its curvature shape, obtaining the final arc-shaped cap product. This invention effectively solves the problem of springback during sheet metal bending by introducing a combination of bending die design, graded pressure control, and stress-relieving and shaping processes, ensuring the accuracy of the final product's curvature and external dimensions.

The utility model relates to the technical field of vehicle-mounted electric control cover plate die-casting, and discloses a new energy vehicle-mounted electric control cover plate die-casting device which comprises a die-casting device body, a baffle is fixedly connected to the left side of the top of the die-casting device body, a die-casting mechanism is arranged at the top of the die-casting device body, and a base is fixedly connected to the bottom of the die-casting device body. A collecting mechanism is arranged at the bottom of the die-casting device body, the die-casting mechanism comprises a die-casting assembly and a stirring assembly, the die-casting assembly is arranged at the top of the die-casting device body, and during use, through the arranged die-casting mechanism, when a vehicle-mounted electric control cover plate needs to be subjected to die-casting work, a first servo motor drives a first threaded rod to rotate; the hydraulic cylinder pushes the push plate, raw materials in the conveying pipe stably and accurately enter the first die, the right side of the second die makes close contact with the left side of the first die, and the sealing performance of the dies in the die casting process is guaranteed.

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 provides a kind of supporting leg riveting tool, including underframe;Two columns, the opposite side of two described columns is provided with positioning pin, the positioning pin can be inserted to the preset hole site of support plate both sides to position support plate, the same side of two described columns is protruded and set first support platform;Second support platform, the upper end of second support platform is provided with V-shaped positioning slot;After assembly ends, when lifting supporting leg structure from shaft sleeve, support plate can be turned up around positioning pin, and by adjusting the spacing of two columns, so that column avoids and supporting leg vertical plate of support plate exist in the first direction and offset, avoid interference, when supporting leg structure is lifted to vertical, positioning pin can be removed, or continue to adjust the distance of two columns, so that positioning pin and support plate separate, supporting leg structure is smoothly lifted away.

The utility model discloses a novel roll bending inner chamber filling structure relates to the field of roll -in technology, including device platform, the device platform upper surface is established with the mounting groove, the inboard of mounting groove is provided with filling assembly and pull assembly respectively, the filling assembly is including fixed base, the fixed base upper end fixedly connected with the filling groove, the filling groove lower surface fixedly connected with spring box and is provided with the through groove with spring box upper surface through -setting, the utility model discloses the filling assembly of setting, pull rod and draw a rope realize soft and hard link, thereby realize the matching of product and draw a rope, and the middle position of core mould increases a limit ring and product inner width surface effective flow contact, has reduced product and the cooperation clearance and contact area of filling, has effectively solved the problem of filling local deviation, has effectively improved the work efficiency of filling, has improved practicality.

The invention relates to the technical field of model prediction control, in particular to a cooling capacity balanced cooling control method and system for toothbrush injection molding, and the method comprises the steps: calculating a first cooling rate compensation coefficient of the upper and lower surfaces of a mold according to the area difference between the contact area of an upper mold and the contact area of a lower mold of a toothbrush; heat conduction parameters of the upper die and the lower die are collected; calculating a second cooling rate compensation coefficient of the upper and lower surfaces of the mold based on the obtained heat conduction parameters; and inputting the temperature of the cooling liquid, the flow velocity of the upper mold cooling fluid, the first cooling rate compensation coefficient and the second cooling rate compensation coefficient into a pre-constructed lower mold cooling flow velocity prediction model, and outputting the flow velocity of the lower mold cooling fluid. The prediction model is introduced to calculate the optimal flow velocity of the lower die under the condition that the reference flow velocity of the upper die and the temperature of the cooling liquid are given, in this way, the cooling rates of the upper surface and the lower surface tend to be consistent, and section temperature difference and shrinkage difference caused by non-synchronous solidification are avoided.

This invention provides a core box mold for casting large motor bases, belonging to the field of casting mold technology. The core box mold is manufactured based on the five-part structure of a large motor base sand core. The core box mold includes an inner cavity air hole sand core 1# core box for manufacturing inner cavity air hole sand core 1#, an outer cavity sand core 2# core box for manufacturing outer cavity sand core 2#, an outer cavity sand core 3# core box for manufacturing outer cavity sand core 3#, an outer cavity sand core 4# core box for manufacturing outer cavity sand core 4#, and an outer cavity sand core 5# core box for manufacturing outer cavity sand core 5#. These five core boxes are independent of each other. This invention provides a corresponding core box mold comprising five parts for the new integrated sand core structure of large motor bases, solving the manufacturing problem of the new integrated sand core and creating conditions for achieving boxless casting of the base.

This invention relates to the field of metal surface strengthening technology, specifically a method for in-situ generation of TiC-TiN ceramic materials using a titanium-containing substrate and an atmosphere-assisted high-energy beam. This method utilizes the titanium-containing substrate itself as a titanium source. Under a specific atmosphere, high-energy beam irradiation causes the Ti element in the substrate to react in-situ with C and N elements in the atmosphere, generating a TiC and / or TiN ceramic strengthening layer on the substrate surface. Specifically, the method includes: pretreating the titanium-containing substrate; placing it in a reaction chamber and introducing an auxiliary gas containing C and / or N; scanning and irradiating the substrate surface with a high-energy beam, controlling process parameters to allow Ti to react with C and N, generating a 0.5-1.2 mm thick metallurgically bonded strengthening layer. The advantages are: this invention eliminates the need for additional titanium powder or carbon powder, resulting in a simple and low-cost process; the strengthened layer exhibits high bonding strength with the substrate with no risk of detachment; and it significantly improves the surface hardness, wear resistance, and corrosion resistance of the substrate, making it widely applicable in military, aerospace, and marine equipment fields.

The utility model discloses an auxiliary chamfering mechanism of an edge grinding machine. The auxiliary chamfering mechanism comprises a base; the X-axis motor is mounted on the base and is connected with the lathe head through a screw rod; the lathe head is installed on the base through a guide rail sliding block and can move in the X direction along a guide rail; the left shaft is mounted in a left shaft hole of the lathe head, and the left chuck is mounted at the shaft end of the left shaft; the right shaft is mounted in a right shaft hole of the lathe head, and the right chuck is mounted at the shaft end of the right shaft; the grinding wheel is mounted on the base and can move back and forth; the displacement sensor is mounted on the headstock; the stop block is mounted on the right shaft; the mounting seat is mounted on the stop block; the handle mechanism is installed on the lathe head and used for controlling the right shaft to slide along the shaft hole. The position of the right shaft clamping the product is detected in real time through the displacement sensor, so that the change of the thickness of the product is detected, compensation is carried out in the control system, and the problem of inconsistent chamfers caused by the thickness error of the product is solved.

This invention relates to the field of machining fixture technology, specifically to a rapid clamping device for preventing deformation of thin-walled parts. The device includes a base plate with four support columns on its top side wall. The outer side walls of the four support columns are fixedly connected to the same support plate. The support plate has two sliding strips at its top. One side wall of the support plate has a guiding mechanism for guiding the part. The outer side walls of the support columns are slidably connected to a clamping and positioning mechanism for holding and positioning the part. This rapid clamping device for preventing deformation of thin-walled parts employs an integrated design with the guiding mechanism and the clamping and positioning mechanism working in tandem. The guiding mechanism can precisely and quickly transport the thin-walled part to the designated workstation via transmission. The limiting block and the flipping plate work together to prevent offset and slippage during part transport, ensuring accurate part transport posture.

The utility model discloses a cabinet board fixed distance cutting mechanism, and a plurality of pulleys are equidistantly arranged on the workbench, a scale is arranged on the right top of the workbench, a clamping structure is arranged at the bottom center of the workbench, and a driving fixing structure is arranged on the back side of the workbench. The utility model relates to the technical field of board processing mechanical equipment, and the scale arranged on the right side of the workbench can quickly and accurately measure the board, the first lead screw, the light shaft and the sliding block are combined in the driving fixing structure, the lifting frame can stably walk up and down along the straight line, the driving fixing structure integrates the driving motor, the lead screw and the cutting motor, realizes the mechanization and automation of the cutting process, and the operator only needs to push the walking base to move left and right to complete the cutting. The clamping structure at the bottom of the workbench drives the second lead screw by rotating the handle, moves the clamping plate, and tightly presses the board on the workbench from the left and right sides.

The utility model relates to the technical field of dies, in particular to a forming die of an oxide ceramic product, which comprises a base, a die mechanism is arranged on the base and used for forming the oxide ceramic product, the die mechanism comprises a lower die, an upper die and a lower die, the lower die comprises a lower die holder fixed at the top of the base, and an inner cavity is arranged at the upper end in the lower die holder; four straight grooves distributed circumferentially are formed in the lower end of the interior of the inner cavity, sliding blocks are slidably installed in the straight grooves, a shaping plate is fixed to the upper ends of the sliding blocks, a circular plate is rotatably installed at the lower end of the interior of the lower die base, four arc grooves distributed circumferentially are formed in the outer edge of the upper end of the circular plate, cams are rotatably installed at the lower ends of the sliding blocks, and the cams are located in the arc grooves; a driving piece is mounted on the lower die holder and is used for driving the circular plate to rotate; the upper mold is arranged above the lower mold and is used for compacting the filler in the lower mold; the outer wall of the product and the shaping plate are free of contact friction during demolding, internal damage is avoided, it is guaranteed that no hidden defect exists after sintering, and the quality and yield of finished products are remarkably improved.

The utility model belongs to the technical field of molds, and relates to an injection mold for a storage box body with imitation sewing leather patterns. The storage box body forming mold comprises a storage box body forming lower mold and a storage box body forming upper mold, and an injection molding piece is arranged above the storage box body forming upper mold. In the using process, the pattern forming grooves and the stitch-imitating leather pattern forming protrusions are correspondingly arranged on the upper mold and the lower mold, stitch-imitating leather patterns can be accurately formed on the surface of the storage box body, and then due to the optimized design of the rotating shaft forming structure, the pattern forming efficiency is improved. The rotating shaft positioning convex block is matched with the rotating shaft positioning groove, and the rotating shaft forming middle cavity is matched with the rotating shaft forming middle bulge, so that the main body, the rotating shaft and the surface with unique textures of the storage box body can be integrally formed, the production efficiency is improved, the subsequent processing procedures are reduced, the production cost is reduced, and meanwhile, the product quality is improved. And the size precision and the forming quality of the product are guaranteed through precise matching of all the parts.

The utility model discloses a kind of concrete hexahedron steel formworks, it is related to formwork technical field for concrete pouring construction, including formwork main body, horizontal bracing rib and vertical bracing rib;Hoist ring reserved hole is opened in the top center of formwork main body, and the two side surfaces of formwork main body are symmetrically opened with first reserved hole and second reserved hole, and four corner positions of the bottom surface of formwork main body are all welded with reinforcing gasket;The symmetry welding design of horizontal bracing rib and vertical bracing rib is passed through in the design, cooperate the reinforcing gasket of corner of bottom surface, substantially improve the overall structural strength of formwork, can effectively resist lateral pressure when concrete pouring, guarantee the dimensional accuracy of the concrete hexahedron after forming, and two reserved holes can be embedded PVC pipe before pouring, meet hoisting demand, and multiple hexahedrons can be quickly connected between them;In addition, top hoist ring reserved hole is convenient for formwork self hoisting and transfer.

The invention discloses a three-dimensional model reconstruction method based on a sheet metal bent part expansion drawing, and the method is characterized in that the method comprises the following steps: S1, analyzing a sheet metal expansion drawing, classifying the analyzed primitive entities, and storing the primitive entities in corresponding primitive sets; s2, primitive preprocessing: performing de-weighting, breaking and discrete processing on the primitive, and screening out a metal plate bending line; s3, closed contour searching; s4, judging whether a closed contour exists or not, if not, repeating S3, and if yes, entering S5; s5, contour segmentation and topology construction: performing inner row segmentation on the outer contour and the inner contour by using a bending line, and establishing a geometric adjacency relation between the inner contour and the outer contour; s6, bending deduction is conducted, specifically, a deduction value is calculated according to the workpiece and bending information, and contour deduction is conducted on the contour; and S7, performing three-dimensional reconstruction, and constructing a three-dimensional entity model. According to the method, the technical defects that three-dimensional model reconstruction cannot be correctly carried out on a complex sheet metal expansion drawing and the model size error is large are overcome.

The present application relates to the field of paper barrel manufacturing, and discloses an expanded-mouth straight-wall type hot-melt adhesive storage paper barrel and a bottom sealing method thereof, which comprises the following steps: S1, a metal ring is sleeved on a paper barrel body, and an end portion sleeved with the metal ring is placed in a diameter expanding machine to expand the diameter, so as to form an expanded end on the paper barrel body; S2, a bottom plate is placed on a tray in a bottom sealing crimping machine, and then the paper barrel body is placed on the bottom sealing crimping machine, the bottom sealing crimping machine clamps the paper barrel body, and the tray sends the bottom plate upward into the expanded end; S3, a crimping die in the bottom sealing crimping machine moves upward, the crimping die crimps the expanded end, the crimping abuts against the bottom plate, the crimping cooperates with an inner top wall of the expanded end to seal the bottom plate, and the bottom sealing is completed. The present application has the advantages of convenient operation, good bottom sealing quality, and the fact that the inner wall of the paper barrel body is a straight wall with a uniform and consistent inner diameter, so that the pressure disc piston can be lowered to the bottom plate, thereby discharging all the hot-melt adhesive, and preventing waste of the adhesive.

The utility model relates to the technical field of building formwork positioning devices, and discloses an assembly type building formwork positioning device which comprises a first fixing frame, one side of the first fixing frame is fixedly connected with a positioning and clamping assembly, and the top of the first fixing frame is fixedly connected with an assembly convenient to assemble. The positioning and clamping assembly comprises a first hydraulic rod fixedly connected to one side of the first fixing frame, a second hydraulic rod is fixedly connected to one side of the first fixing frame, an oil tank is fixedly connected to one side of the first fixing frame, and an oil pump is fixedly connected to one side of the oil tank. The assembly convenient to assemble comprises a fixing buckle fixedly connected to one side of the first fixing frame. According to the fabricated building formwork positioning device, through the arrangement of the positioning and clamping assembly, the position of a formwork is conveniently fixed, the formwork is prevented from deviating or loosening in the construction process, the size precision and the structural stability of concrete pouring are guaranteed, the construction efficiency is improved, and the manual adjustment time is shortened.

The utility model belongs to the technical field of dies, and particularly relates to a draft-free die for a synchronous pulley, which comprises a movable module, a fixed module is arranged on one side of the movable module, a surrounding structure is arranged on the movable module and comprises a turntable and a plurality of first guide grooves, the turntable is rotatably connected onto the movable module, and the first guide grooves are arranged on the turntable. The movable module is slidably connected with a plurality of sliding blocks, one end of each sliding block is fixedly connected with a first guide shaft, each first guide shaft extends into the corresponding adjacent first guide groove and is slidably connected with the rotating disc, the other end of each sliding block is fixedly connected with a check block, the adjacent check blocks abut against each other, and the fixed module is provided with a pushing structure; and during mold opening, the multiple stop blocks move away from the synchronous belt wheel, so that demolding of the synchronous belt wheel can be achieved without pattern draft, and high-precision die-casting forming of the synchronous belt wheel is achieved.

The utility model provides a quick-assembly type casting mould opening mechanism, which relates to the technical field of casting mould opening and comprises a lead screw, one end of the lead screw is rotatably connected with a dovetail plate for movable supporting, the top ends of the two dovetail plates are fixedly provided with supports for supporting connection, and the supports are fixedly connected with the lead screw. A left mold fixing plate and a right mold fixing plate which are used for supporting and fixing a mold are fixedly installed at one ends of the two supports correspondingly. Compared with the prior art, the mould has the advantages that the T-shaped groove is matched with the T-shaped block, so that the mould can be quickly assembled and disassembled, the mould replacement time is greatly shortened, the equipment shutdown time caused by mould replacement is reduced, the overall efficiency of casting production is improved, the mould can be accurately positioned through the positioning pin, stable guidance is provided in the mould opening process, and the production efficiency is improved. Deviation of the mold in the moving process is avoided, so that the size precision and surface quality of a casting are guaranteed, the defective rate is reduced, all parts are tightly matched, and long-term stable operation of the mechanism can be guaranteed.

The utility model relates to aluminium bar processing technical field, concretely is adjustable aluminium bar processing and draws the device, including base, through replacing the component selection suitable mould and install fixed, the one end of aluminium bar is positioned through the round hole of mould, the other end is put into the clamp between movable block, through the control switch and start electric push rod, electric push rod is the market product, and electric push rod output end promotes T type block movement, and T type block drives two clamps to be close to each other to hold firmly aluminium bar, and then starts the motor, and the motor is the market product, and the motor output end drives screw rod rotation, since screw rod is connected with movable block screw thread, and movable block is through the sliding rail and the base sliding engagement, and the rotation of screw rod converts into movable block linear motion along the sliding rail far away from the pedestal, and movable block drives aluminium bar to stretch through the clamp, when stretching to the required degree, through the control switch and close the motor and electric push rod, and electric push rod resets and makes the clamp loose, and the stretching processing of aluminium bar is completed.

This utility model discloses a sand mold manufacturing equipment for casting water glass. A molding base plate is sequentially conveyed to a coating component, a sand filling component, a compaction component, a hardening component, and a demolding component via a conveying assembly to complete the sand mold manufacturing. During the manufacturing process, the mold surface is covered with a thin film, improving the surface smoothness of the mold and thus enhancing the surface quality of the sand mold cavity, thereby improving the surface quality of the casting. The thin film also separates the sand mold from the model, significantly reducing demolding resistance. Therefore, the draft angle can be appropriately reduced, improving the dimensional accuracy of the casting. Furthermore, during demolding, issues such as scratching the cavity or localized damage to the cavity are avoided, reducing the workload of subsequent sand mold repair. Improving the surface quality of the sand mold further enhances the surface quality of the casting, while simultaneously reducing wear on the model from the sand mold, ensuring the dimensional accuracy of the model, extending the model's service life, and further improving the dimensional accuracy of the casting.

The present application belongs to the technical field of valve stem precision manufacturing, and particularly relates to a valve stem manufacturing process. The valve stem manufacturing process provided by the present application adopts five-step axial cold extrusion step forming: S1, a cylindrical blank is extruded into a second blank with a lower end lower convex arc shape through a first die; S2, an arc necking section is formed through a second die, and a third blank with different upper and lower diameters is obtained; S3, a fourth blank with three sections of decreasing diameters is formed through twice taper necking of a third die; S4, the upper end is formed into an arc convex surface and a gradually expanding structure through extrusion of a fourth die, and a fifth blank is obtained; and S5, the target valve stem containing three stepped disc bodies and sunken tables, annular extended edges and other details is finally extruded through a fifth die. The valve stem manufacturing process of the present application controls material flow in steps, reasonably designs die cavity section structure to cooperatively control material flow, guarantees valve stem forming precision and quality, avoids stress concentration, and is suitable for batch production.

The invention relates to the technical field of plastic production cooling, in particular to an efficient cooling device for plastic bucket production, a pushing structure is used for pushing a plurality of positioning blocks to move, and a plastic bucket placed on a positioning disc body is positioned; a first lifting air cylinder of the shaping assembly is fixed to the upper portion of a positioning disc body, a supporting rod is fixed to the lower portion of a lifting plate, a plurality of parallel rotating rods are rotationally arranged on the supporting rod, a plurality of vertical supporting plates are rotationally connected with the parallel rotating rods correspondingly, and a pulling structure is used for driving the parallel rotating rods to rotate. The cooling assembly comprises an internal cooling spray head set and an external cooling spray head set, the heat exchange efficiency is remarkably improved through simultaneous action of the internal and external spray head sets, and the problem of shrinkage deformation in the plastic cooling process is effectively solved by actively supporting the inner wall of a bucket through an internal supporting plate and cooperating with clamping of an external positioning block; and the size precision and the roundness of the product are ensured.

The utility model discloses an automatic cutting machine for circuit board production, which comprises a base, vertical plates are fixedly mounted on two sides of the top of the base, a fixing frame is fixedly mounted on the front sides of the vertical plates, a motor is fixedly mounted on the right side of the vertical plate on the left side, and a threaded rod is fixedly mounted at the output end of the motor. The outer portion of the threaded rod is in threaded connection with a threaded block, a movable frame is fixedly installed on the front side of the threaded block, a grinding roller is rotationally connected into the movable frame through a bearing, a rotating shaft is fixedly installed on the front side of the grinding roller, and the front end of the rotating shaft penetrates into the fixed frame to be fixedly connected with a gear. And the bottom of the gear is movably engaged with a toothed plate. Through the matching of the structures, the circuit board after cutting is polished, so that burrs on the circuit board can be removed, the surface smoothness of the circuit board can be improved, the size precision can be ensured, and the product reliability can be enhanced.

This application relates to the field of mechanical parts processing technology, specifically disclosing a grinding device for excavator parts, including a main body and a grinding robotic arm. The grinding robotic arm is provided on the outer surface of the main body. The grinding robotic arm includes a robotic arm, a drive motor, and a grinding disc. The output end of the drive motor is sleeved with the grinding disc. This invention can clean the worktable in a timely manner through a dust removal component, preventing debris from affecting subsequent grinding work, ensuring that the parts are placed stably and positioned accurately. Keeping the worktable clean reduces the flying of debris and dust, improves the working environment, and protects the respiratory health of operators. The clamping component can stably clamp the parts, and can promptly issue an alarm when the parts deviate in the clamp, preventing unqualified products from entering the market. In addition, it can detect the parallelism of the clamping arm and issue an alarm when the clamping arm tilts, preventing uneven distribution of clamping force during grinding.