75results about How to "Uniform wall thickness" patented technology

The invention relates to a die forging forming method for spherical shell type forgings, which belongs to the technical field of forging and comprises the following steps: determining a small strain area of the spherical shell type forgings in the die forging forming process; a mold is manufactured, the mold comprises an upper mold body and a lower mold body, the upper mold body is provided with a cavity matched with the contour of the spherical shell type forge piece, the cavity wall of the cavity comprises a target area, and a groove is formed in the target area; placing the blank on a lower die; the upper die is driven to press downwards, the cavity wall of the cavity is used for extruding the blank so that the blank can be formed into a preformed forge piece, and a protrusion is formed in a small strain area of the preformed forge piece; the upper die is driven to ascend, and the preformed forge piece is driven to rotate on the lower die, so that the protrusions and the grooves are staggered; the upper die is driven to press downwards again, the old protrusion is flattened through the cavity wall of the cavity, and a new protrusion is formed in the small strain area of the preformed forge piece; repeating the two steps for multiple times to obtain a final forge piece with a bulge on the outer surface; and the protrusions on the outer surface of the final forging are removed through machining, and the spherical shell type forging is obtained.

The utility model discloses a pipe mold and relates to the technical field of molds. The die comprises a feeding end core die, a discharging end core die, a die fixing sleeve, a discharging opening die, a feeding outer die and a feeding end die plate. The feeding end core mold is sleeved with the feeding outer mold, the feeding end core mold and the feeding outer mold are fixed to the feeding end mold plate through bolts respectively, a feeding port is formed in the side wall of the feeding outer mold, a spiral guide-in groove is formed in the position, below the feeding port, of the outer wall of the feeding end core mold in the direction towards the discharging end, and the spiral guide-in groove is communicated with the feeding end mold plate. The discharging end core mold is fixed to the feeding end core mold through a bolt, the discharging end core mold is sleeved with a discharging opening mold, a mold fixing sleeve is arranged between the discharging opening mold and the feeding outer mold, and the discharging opening mold, the feeding outer mold and the mold fixing sleeve are connected through bolts. Internal pressure is reduced in a spiral feeding mode, meanwhile, the core mold at the feeding end is of a hollow pipe structure, the mass of the core mold is reduced, the consistency of the heating temperature of the inner mold and the heating temperature of the outer mold can be effectively kept, the wall thickness is uniform, the product percent of pass is increased, and the production cost is reduced.

The utility model discloses a stator assembly, a linear motor, a suspension system and a vehicle, the stator assembly comprises a stator core shaft, the stator core shaft comprises a shaft wall, the shaft wall is internally provided with a first cooling water channel, the peripheral wall of the stator core shaft is provided with a positioning groove, and the first cooling water channel is arranged in the positioning groove in the circumferential direction of the stator core shaft. The first cooling water channels and the positioning grooves are arranged at intervals; the stator core is sleeved outside the stator core shaft, the first cooling water channel exchanges heat with the stator core, the inner circumferential wall of the stator core is provided with a positioning protrusion, and the positioning protrusion is located in the positioning groove. According to the utility model, the positions of the first cooling water channels and the positioning grooves in the stator core shaft are arranged more reasonably, the structural strength of the stator core shaft is high, the cooling effect on the stator core is good, and the working performance of the stator assembly can be improved.

The utility model discloses a low-voltage contact pin sheath structure, and relates to the technical field of low-voltage board end sockets, the low-voltage contact pin sheath structure comprises a PCB and a low-voltage contact pin protection assembly, the low-voltage contact pin protection assembly is connected to the top of the PCB, the PCB comprises a board body, the end face of the board body is provided with a contact pin mounting hole, four corners of the board body are respectively provided with a positioning hole, and the low-voltage contact pin protection assembly is connected to the bottom of the board body. According to the scheme, the low-voltage contact pin sheath structure is designed, the structural stability and the operation reliability of the board end connector are effectively improved, the rigidity of the contact pins is particularly improved, bending deformation possibly occurring in the using process is prevented, due to the design that the contact pins and the insulator are pre-fixed, the assembling process is simplified, installation is more rapid and convenient, and the cost is reduced. The gap design between the bottom of the insulator and the end face of the PCB prevents overflow of soldering tin, so that equipment damage possibly caused by short circuit is avoided, the fabrication holes ensure uniform wall thickness of the insulator, conditions are provided for forming of a mold, and the key effect on improving the overall quality of products and the machining efficiency is achieved.

The invention relates to the technical field of precision casting, in particular to a method for controlling the wall thickness of a wax mold of a complex hollow single crystal turbine blade and the wax mold. According to the method, ceramic cores are screened by obtaining the profile size of the sections, corresponding to the wall thickness points of the wax mold, of the ceramic cores; then, positioning bosses are matched with positioning holes, the screened ceramic mold cores are placed in a wax mold for positioning, wax is injected into the wax mold, and a blade wax mold is manufactured; detecting the wall thickness of a blade wax mold and the wall thickness of a corresponding casting, and obtaining a wall thickness change value; and finally, according to the wall thickness change value, the maximum value and the minimum value of the wall thickness of each detection point of the wax mold are obtained, so that the wall thickness of the wax mold produced subsequently is accurately controlled, the casting wall thickness out-of-tolerance caused by improper wax mold wall thickness control requirements is avoided, and the casting wall thickness qualification rate is increased. The problem that in the prior art, due to shrinkage of a ceramic core, the wall thickness of a wax mold of the single-crystal turbine working blade cannot meet the process requirement is solved.

This invention belongs to the field of drilling tool technology, specifically relating to a device for ensuring uniform rubber wall thickness after adhesive injection in a stator with equal wall thickness. The device includes inner and outer spiral positioning heads, a connecting rod, a base, a mandrel, an upper plug, a lower plug, an upper baffle, a lower baffle, a positioning bolt, an upper nut, a first nut, and a second nut. The inner and outer spiral positioning heads are connected to the base via the connecting rod. The inner side of each positioning head has an inner spiral that engages with the threaded surface of the mandrel. The upper plug is fitted onto one end of the mandrel, the upper baffle is fitted onto the mandrel and fixed by the upper nut, and the lower plug is fitted onto the other end of the mandrel. The first nut is threadedly connected to the other end of the mandrel and presses against the lower plug. The lower baffle is threadedly connected to the other end of the mandrel and fixed by the second nut. The positioning bolt passes through the side of the stator housing with equal wall thickness. This device ensures uniform rubber wall thickness after adhesive injection in the stator of a screw drilling tool with equal wall thickness, thus improving the service life of the stator.

The invention relates to the technical field of glass tube machining, in particular to a borosilicate glass tube forming outer diameter precise regulation and control device and a regulation and control method thereof.The borosilicate glass tube forming outer diameter precise regulation and control device comprises a polishing machine body, a polishing assembly, a gas collection assembly and a heat energy conversion assembly, and a supporting piece is arranged on an output shaft of the polishing machine body; a first grinding piece is arranged on one side of the workbench, a second grinding piece is arranged on the other side of the workbench, the gas collection assembly comprises an exhaust groove and a gas suction groove, and the heat energy conversion assembly comprises a heat transfer piece. According to the device, heat of the borosilicate glass tube can be absorbed through the heat energy conversion assembly, so that the first grinding piece and the second grinding piece grind the borosilicate glass tube after the glass tube is cooled to a certain temperature, and the problems that the wall thickness distribution is uneven and the outer wall is not smooth in the standing and cooling process of the borosilicate glass tube are solved.

The invention relates to a receiver dryer barrel, which belongs to the field of automobile air conditioner heat pump systems, and comprises a barrel (1) and a sleeve (2), the barrel (1) is arranged in the sleeve (2), the wall thickness of the barrel (1) is uniform, the barrel (1) is an extrusion molding pipe, the liquid storage and pressure resistance performances are achieved, and the weight of the barrel is reduced; a water outlet (4), a connector (5) and a fixing opening (6) are formed in the outer wall of the barrel (1), the water outlet (4) is provided with a pipeline (10) connected with a condenser pipeline, the connector (5) is provided with a positioning pin (9) which can prevent the barrel (1) and the sleeve (2) from moving relatively, the fixing opening (6) achieves fixation of the receiver-drier, the receiver-drier is integrally of an integrated structure, stability is good, an argon arc welding rear cover plate is adopted for the rear cover portion (8), sealing performance is good, and the receiver-drier is convenient to assemble and disassemble. The positions of the water outlet (4) and the connector (5) are matched with the position of a condenser flow channel, so that the condenser flow channel is convenient to change.

The utility model discloses an ice maker which comprises a pre-cooling water path plate, an evaporator and a spraying water path plate, the evaporator comprises an evaporation pipe and a plurality of ice fingers which are fixedly connected with the evaporation pipe and extend downwards, and the evaporation pipe is clamped between the pre-cooling water path plate and the spraying water path plate; the pre-cooling water path plate is provided with a raw water inlet, a pre-cooling cavity communicated with the raw water inlet and a pre-cooling water outlet communicated with the pre-cooling cavity, and the spraying water path plate is provided with a pre-cooling water inlet communicated with the pre-cooling water outlet, a spraying cavity communicated with the pre-cooling water inlet and a spraying opening communicated with the spraying cavity. The spraying waterway plate is further provided with a through hole for the ice finger to penetrate through, and the spraying openings are arranged around the through hole. The interlayer design of the pre-cooling water path plate, the evaporator and the spraying water path plate can protect the evaporator on one hand, and on the other hand, the cooling capacity of the evaporator can be fully utilized to pre-cool raw water, so that the ice making efficiency is improved.

The utility model discloses a plate spring support which comprises a support body used for connecting a girder and a plate spring body and a limiting assembly, the support body is provided with a side extending plate capable of supporting the bottom wall of the girder, the support body is provided with a first wall and a second wall which are arranged in parallel, and the first wall is perpendicular to the side extending plate and attached to the side wall of the girder. The limiting assembly is installed on the frame body and connected with the girder and the plate spring body. The weight of the support can be reduced while the structural strength is guaranteed, and the dead weight of the whole vehicle is reduced.

The application relates to the technical field of pipe extrusion, in particular to a power-saving furnace for seven-hole plum-blossom pipe extrusion forming with adjustable extrusion pipes, which comprises an extrusion furnace for melting materials and a pipe die set coaxially connected to the discharge end of the extrusion furnace, a storage rack is arranged outside the discharge end of the extrusion furnace, and a plurality of pipe die sets with different specifications are arranged for staggered sliding switching; the pipe die set is coaxially composed of an extrusion pipe, a pipe sleeve die and a plurality of pipe hole dies from outside to inside, a central shaft die is sleeved on the central shaft of the extrusion pipe, and a pipe material channel is formed between the extrusion pipe and the plurality of pipe hole dies and the central shaft die; and the plurality of pipe die sets are slidingly clamped on the storage shaft. The application can complete the quick disassembly of old dies and the accurate positioning and installation of new dies by suspending a plurality of pipe die sets with different specifications on the storage rack in a staggered mode; the technical effect that only the screw extrusion function needs to be stopped when plum-blossom pipes with different aperture specifications are replaced, and the extrusion furnace heating function does not need to be stopped is achieved; and the power-saving benefit is realized.

The utility model discloses a light-weight plastic bottle which comprises a bottle body, the bottle body is made of PET (polyethylene terephthalate) materials, and the wall thickness of the bottle body is uniform and does not exceed 0.5 mm. The bottle body comprises an upper bottle body, a lower bottle body and a bottle bottom, a first groove is formed between the upper bottle body and the lower bottle body, a bottle opening is formed in the top of the upper bottle body and is in threaded connection with a bottle cap, and a second groove is formed between the lower bottle body and the bottle bottom; and a plurality of first reinforcing ribs which are uniformly distributed at equal angles are arranged on the outer side wall of the bottle bottom. According to the light-weight plastic bottle, the wall thickness of the bottle body is uniform and does not exceed 0.5 mm, the overall weight is effectively reduced, meanwhile, the structural strength and stability of the bottle bottom, the upper bottle body and the lower bottle body are improved through the first reinforcing rib, the second reinforcing rib and the third reinforcing rib, and the sealing ring made of silica gel materials is arranged, so that the sealing effect is good. And the sealing performance between the bottle cap and the upper bottle body is ensured.

The present invention discloses an automatic queen bee base making device and a method for using the same, comprising a cabinet body, a manipulator assembly is mounted on the top surface of the cabinet body, a fixing plate is provided at the working end of the manipulator assembly, a plurality of equidistantly arranged metal fingers are fixed on the bottom surface of the fixing plate, the metal fingers are made of a thermosensitive bimetallic material, the queen base is detachably connected to the outer side of the metal fingers, a water surface depth sensor and a wax liquid depth sensor are penetrated on the fixing plate; the metal fingers made of a thermosensitive bimetallic material are sensitive to changes according to the temperature of a wax tank, the metal fingers are easy to detach from the queen base after shrinking at room temperature, and the success rate of the queen base sticking to the base strip is improved, the wax liquid in the wax tank can be kept at a constant temperature through the temperature control assembly, and the production size of the queen base is guaranteed to reach a uniform specification.

This invention relates to a method for preparing capillary seamless steel tubes, comprising the following sequential steps: S100. Selecting austenitic stainless steel seamless tubes as tube blanks, the outer diameter of the tube blanks being 8mm-15mm, the wall thickness being 0.5mm-1.2mm, and the wall thickness accuracy being ±0.015mm; S200. Using a drawing machine with a long mandrel, cold-drawing the tube blanks from S100, when the deformation compression rate of a single cold drawing is 30%-75%, performing internal and external surface cleaning and solution treatment; repeating the above treatment until a capillary seamless steel tube with an outer diameter of 3.8mm-4.2mm and a wall thickness of 0.125mm-0.3mm is obtained. Drawing the billet; wherein the hardness of the long mandrel is 780HV-860HV, and the diameter accuracy of the long mandrel is ±0.005μm; S300. Using a drawing machine with a moving mandrel, the moving drawing billet obtained in S200 is cold drawn. When the deformation compression rate of a single cold drawing is 30%-75%, the inner and outer surfaces are cleaned and solution treated; repeat the above treatment to obtain a capillary seamless steel tube with an outer diameter of 0.59mm-1mm, a wall thickness of 0.05mm-0.09mm, and a wall thickness accuracy of ±0.003mm; S400. The capillary seamless steel tube obtained in S300 is subjected to external grinding treatment to obtain the final product.

The invention relates to a flywheel device (1, 20) formed from a flywheel ring (2), cages (3, 24), clamping elements (4) and springs (5), sliding shoes (7) being oriented on the flywheel ring (2) and clamping ramps (6) being oriented between two adjacent sliding shoes (9), in each case one sliding shoe (7) being received in one of the cages (9), and in each case one clamping element (4) being received in the other cage (3, 24). Wherein the retainers (3, 24) are guided on both sides (11, 12) of the respective sliding shoe (9), and wherein at least one of the retainers (9) is provided with two projections (13, 14, 25, 26), the invention relates to a sliding shoe (9) having two projections (11, 12) which are arranged axially adjacent to each other, parallel to the axial direction of the flywheel axis (10) and together project from the cage (3, 24) into the holder (9) in the direction of one of the sides (11, 12) of the respective sliding shoe (9).

The invention discloses a plate pre-drawing and dieless mirror image loading composite forming process and a product, and belongs to the technical field of metal component forming and manufacturing. The method is used for solving the problems of cracking, ultra-poor thinning, low dimensional precision and the like in the forming process of the high-strength aluminum alloy thin-wall component with local continuous large-area bulge and local large wall angle characteristics in the aerospace field. According to the method, through two-stage area expansion distribution, the thinning amount of each stage is effectively controlled, and the cracking problem caused by one-time large deformation in a single process is avoided. And mirror images are cooperatively loaded on the local part of the plate to form a three-dimensional stress state, so that the forming limit is improved. And in-mold constraint aging synchronously realizes strengthening and shape righting, and is obviously superior to the traditional process.

The invention discloses a clamping method for processing a rocker arm swash plate on a dual-spindle chuck turning and milling compound machine tool, comprising the following steps: the first step is to manufacture a mold-type soft jaw according to the shape structure of the rocker arm swash plate; the second step is to install two mold-type soft jaws on a two-jaw chuck, and use the two-jaw chuck to drive the mold-type soft jaws to clamp the rocker arm swash plate blank; the third step is to process a limiting threaded hole on the side of the mold-type soft jaw, and use a limiting screw to realize the positioning of the rocker arm swash plate blank in the direction of the ear shaft hole; the fourth step is to process the corresponding position of the rocker arm swash plate blank to obtain a semi-finished rocker arm swash plate machined part; the fifth step is to manufacture a post-processing fixture according to the structure of the semi-finished rocker arm swash plate machined part; the sixth step is to use the post-processing fixture to position and clamp the semi-finished rocker arm swash plate machined part, and then process the semi-finished rocker arm swash plate machined part to obtain a finished rocker arm swash plate. The invention has the characteristics of being able to effectively improve the rigidity of the product and stabilize the processing quality.

The utility model provides an electronic throttle valve body which comprises a throttle valve shell and a throttle valve piece used for driving a throttle valve shaft to rotate, and a rotating shaft driving mechanism used for driving the throttle valve shaft to rotate is arranged in the shell. The rotating shaft driving mechanism comprises a direct-current motor, a motor gear, an intermediate gear, a sector gear assembly, a magnetic core assembly and a torsion spring, the direct-current motor is installed on one side of the throttle body, the motor gear is installed on an output shaft of the direct-current motor, the intermediate gear is rotatably installed on the throttle shell and meshed with the motor gear, and the sector gear assembly is connected with the magnetic core assembly. The sector gear is connected to the end of the throttle valve shaft through laser welding, the sector gear is meshed with the intermediate gear, the torsion spring is arranged on the sector gear in a sleeved mode, and the two ends of the torsion spring are fixed to sector gear limiting supporting legs. The electronic throttle valve body has the advantages of being simple in structure, low in cost, good in consistency of flow of a lower dead center of an assembly machine and flow of a default position, and capable of greatly improving reliability and stability of the electronic throttle valve body.

The application provides a design method and system for an internal-external flow coupling structure of a full-shield turbine rear support plate, which can ensure uniform wall thickness and stress distribution by respectively modeling cooling chambers for characteristic sections with different blade heights; the two-dimensional modeling of each characteristic section is defined according to the relative axial chord length position, offset distance and chamber length of each cooling chamber; the three-dimensional modeling of each cooling chamber is obtained through a skin method and Boolean operation; the positioning of film holes and impact holes in each characteristic section is determined through the relative arc length position of the inner cavity wall surface, the spatial positioning of each cooling hole is determined through the distance from the hub and the casing and the number of cooling holes, and the geometric configuration design of each cooling hole is completed in combination with the hole diameter and the inclination angle, and the three-dimensional cooling structure modeling is obtained by rounding the edges of each chamber, so that the design method and system have the advantages of fewer design variables, strong adaptability to blade shapes, high automation degree and the like, and are helpful to the efficient and agile design of a full-shield turbine rear support plate with an impact-film combined cooling structure.

The application discloses a 46120 type cylindrical battery shell drawing process, which comprises the following steps: drawing a blank with a diameter of 145mm-150mm and a thickness of 0.6mm±0.06mm, the drawing coefficient ranges from 0.54 to 0.56, the first concave die entering mode radius ranges from 7mm to 10mm, the first convex die radius ranges from 7mm to 10mm, the edge pressing mode is flat edge pressing, the edge pressing force ranges from 2.5T to 3.0T, and a hollow cylindrical first semi-finished product is formed after drawing. The 46120 type cylindrical battery shell drawing process can realize the forming of the cylindrical battery shell through four drawing processes, and greatly improves the drawing efficiency.

The utility model discloses an LED display screen box body frame and die-casting mould, the LED display screen box body frame comprises a shell and a mounting plate, the shell comprises a containing cavity, the mounting plate is used for being contacted with a power supply located in the containing cavity, the shell is formed by liquid metal die-casting, one part of the shell is located on one side of the mounting plate and is contacted with the mounting plate, and the other part of the shell is located on the other side of the mounting plate. And one part of the shell surrounds the peripheral side of the mounting plate and is in contact with the mounting plate. The shell is enclosed on the outer side of the mounting plate in a die composite forming mode, alloy made of different materials is integrally formed in a composite mode, the problem of sand holes caused by the fact that the wall thickness of a power source mounting portion of an LED display screen box frame is too large is solved, the surface of the mounting plate is smooth and free of sand holes, the contact area with a power source is increased, and the service life of the LED display screen box frame is prolonged. Therefore, the heat dissipation area is increased, and the heat dissipation effect is improved; meanwhile, the wall thickness of the die-casting metal forming part is uniform, the problem of sink marks on the appearance surface is solved, and the attractiveness is improved.

The utility model relates to the field of motors, in particular to a rotor casing, an external rotor motor and an electronic fan, the rotor casing comprises a cylindrical outer casing and a shaft sleeve assembly coaxially arranged in the outer casing, and an accommodating cavity is formed in the shaft sleeve assembly and used for mounting a rotating shaft of a rotor; the shaft sleeve assembly comprises a shaft sleeve body and a connecting part, the connecting part is arranged on the surface of the shaft sleeve body and extends outwards in the radial direction of the shaft sleeve body, the connecting part is welded and fixed to one end of the outer shell, and the connecting part is arranged at the end, adjacent to the outer shell, of the shaft sleeve body; the connecting part is in an annular plate shape, and an inner ring of the connecting part is welded and fixed with the surface of the shaft sleeve body. The integral stretching forming mode of the rotor casing in the prior art is changed into welding and fixing through the outer casing, the shaft sleeve body and the connecting part, high die cost and working hours are saved, unit price is reduced, and the rotor casing is high in product size consistency, uniform in wall thickness and small in unbalance amount.

The present application relates to the technical field of bellows preparation, and particularly relates to a cathode device for preparing an electrodeposited bellows and a preparation method, which comprises a frame body, a core mold assembly, a cathode wire assembly and a power transmission assembly. The frame body is internally provided with the core mold assembly, part of the cathode wire assembly and the power transmission assembly. The inner wall of the cylindrical groove of the frame body is provided with annular sawteeth. The core mold assembly comprises a horizontal connecting rod and a core mold body, the other end of the core mold body extends into the frame body, and each aluminum alloy core mold of the core mold body is detachably connected with a nylon external gear meshing with the annular sawteeth at the end away from the horizontal connecting rod. The present application can effectively control the rotating speed of a single core mold during the electrodeposition process, ensure the stable and uniform rotation of the core mold in the circumferential direction, thereby improving the imbalance of the circumferential current density and ion transmission conditions during the electrodeposition process, and ensuring that the prepared single-layer or multi-layer bellows has a uniform wall thickness in the circumferential direction.

This disclosure provides a cooling device for a battery assembly, the cooling device comprising: a cooling plate extending longitudinally along a first direction, the cooling plate including a cooling outer tube for conducting coolant; wherein the cooling outer tube is formed by bending and closing a single sheet material. Furthermore, this disclosure also provides a battery assembly and a vehicle.

The application relates to the technical field of sheath processing, and discloses a sheath forming device, which comprises a rack, a mounting rack arranged on the rack, a forming structure and a turnover structure for driving the forming structure to turn over, a lifting structure arranged on the rack and used for driving the mounting rack to lift, and a storage structure arranged below the forming structure and used for storing raw materials; the forming structure comprises a die plate arranged on the mounting rack, the die plate is provided with a forming column, the turnover structure comprises two mounting plates rotatably connected to the mounting rack, the die plate is arranged between the two mounting plates, and the mounting plates are provided with rotating structures used for driving the forming column to rotate, and the application has the effect of improving the yield of PVC sheaths.

The invention relates to the technical field of aluminum profile extrusion dies, in particular to a continuous aluminum profile extrusion die for a multi-cavity ultra-thin-walled tube and an upper and lower die closing method thereof.The continuous aluminum profile extrusion die comprises an upper die and a lower die, the lower end of the upper die is connected with the lower die through a pin hole and a positioning pin, and a disassembly groove is formed in the edge of the lower end of the upper die; a positioning table is fixedly connected between the bottoms of the pin holes; the positioning pin comprises a pin body, and an adjusting mechanism is installed on the inner side of the pin body through a driving mechanism. The pin body comprises a cylindrical shell, a hollow hole is formed in the upper end of the cylindrical shell, a bottom hole is formed in the bottom end of the cylindrical shell, and side square holes annularly distributed at equal intervals are formed in the outer side of the cylindrical shell. According to the multi-cavity ultra-thin-walled tube mold, after mold closing of the upper mold and the lower mold is about to be completed, the transverse pressure of the adjusting plate is utilized to make contact with the pin holes, positioning is achieved, pin abrasion caused by pulling and inserting can be effectively avoided, then deviation caused by mold closing of the upper mold and the lower mold can be avoided, and the quality of a multi-cavity ultra-thin-walled tube can be effectively improved.

The application discloses a torsion bar shaft, a lightweight anti-rolling torsion bar and a metal pipe hole processing technology. The torsion bar shaft comprises a metal pipe and a fiber layer which is bonded to the outer periphery of the metal pipe. The lightweight anti-rolling torsion bar comprising the torsion bar shaft further comprises torsion arms at both ends of the torsion bar shaft and an end connecting body. The torsion arms are formed by extending and bending the metal pipe of the torsion bar shaft. The end connecting body comprises a swing arm connecting part and a pull rod connecting part. The swing arm connecting part is connected with the end of the torsion arm, and the pull rod connecting part is connected with the pull rod. The metal pipe hole processing technology comprises the following steps: S1, performing cylindrical processing on a rod to be processed; S2, clamping the rod by reversing the direction, and drilling a hole one and a hole two which are communicated from the A end and the B end of the rod respectively; and S3, positioning and clamping the rod with the axis line one and the axis line two as the pipe hole axis lines, and performing turning on the outer periphery of the rod to make the wall thickness uniform.

The present invention discloses a fully enclosed roto-molding machine and method for polymer material molding, which relates to the technical field of roto-molding machines, including a transmission mechanism, a rotating rod is arranged inside the transmission mechanism, a driving mechanism is arranged at one end of the rotating rod, a heat collecting mechanism for focusing heat energy is arranged at both upper and lower ends of the driving mechanism, a mold shell is arranged inside the heat collecting mechanism, and a pressurizing mechanism extending to the inside of the mold shell and increasing the internal air pressure is arranged on the outer surface of the heat collecting mechanism. The high-pressure gas discharged by the pressurizing mechanism provided in the present invention can effectively reduce bubbles in the plastic solution, improve the density and surface quality of the product, and the reduction of bubbles means that the structure of the product is more uniform, reducing potential defects, and the high-pressure gas can evenly squeeze the plastic solution onto the inner wall of the mold shell, especially in some corners and parts with complex shapes, ensuring that the shape of the product is clear and without defects.

The invention discloses a smelting and machining method for a high-toughness non-magnetic steel pipe in the field of petroleum drilling tools, and solves the problems existing in non-magnetic steel pipe manufacturing in the prior art. (1) high alloy components are adjusted again, the alloy element ratio is strictly controlled, the manganese element is highly controlled, and it is ensured that the steel is non-magnetic; the low-control chromium element ensures the corrosion resistance of the steel, and meanwhile, high chromium is prevented from forming ferrite to influence the magnetism; the nitrogen element is accurately controlled, and high nitrogen is prevented from generating cracks and low nitrogen is prevented from influencing magnetism; (2) a bar drilling process is replaced by an extrusion and cold rolling process in the processing process, so that the yield is improved, and time and processing cost are saved; carrying out gradient heating on the round billet through a secondary heating furnace; a two-pass rolling process is adopted, the wall thickness is increased and decreased in the first pass, and then the product performance is controlled through second-pass rolling. The technology has the technical advantages that the blank is subjected to hot extrusion forming and two-pass cold rolling, the pipe meeting the requirement is obtained, and the product obtained through the technology has the characteristic of high toughness on the non-magnetic basis.