69results about How to "Improve straightness" patented technology

The application provides a double-station worktable for CNC, and particularly relates to the technical field of CNC machine tool auxiliary equipment, and comprises a CNC main body, an inner platform and a tool head unit, and further comprises a double-shaft switching mechanism arranged between the outer side of the CNC main body and the inner platform, wherein the double-station worktable for CNC; the double-shaft switching mechanism composed of an X-axis displacement component, a Y-axis displacement component and a sinking fastening component is arranged, so as to solve the defects of the existing technology, such as the jamming misplacement caused by the single guide rail alignment of the multi-station switching, the lack of special connection structure, the non-separation of the carrier and the guide rail during the processing, the vibration transmission affecting the precision, and the like, to realize the cooperative action of the X-direction bearing movement of the jig table, the Y-direction smooth connection and the locking of the processing position sinking, and the double-station switching does not need complex debugging, so that the equipment downtime is greatly reduced, and the processing precision and stability are ensured.

This invention relates to a method for producing thin-gauge low-density steel sheets using a lap-rolling process. The chemical composition of the steel sheet, by mass percentage, is: C: 0.70–1.20%, Si: 0.10–0.50%, Mn: 16.00–24.00%, P: ≤0.015%, S: ≤0.003%, Al: 7.00–10.00%, Ni: 4.00–8.00%, Nb+Ti: 0.02–0.20%, with the balance being iron and unavoidable impurities. The method includes the following steps: billet preparation, billet compositing, billet welding, compositing billet heating, compositing billet rolling, steel sheet separation, and compositing billet straightening. A low-density steel intermediate billet of a certain thickness and identical length and width is selected as the lap-rolling billet. After welding, thin-gauge low-density steel sheets with a thickness of 3–6 mm and a width of 2000–3500 mm are produced on a medium-thick plate mill. The steel plate has an Fe-Mn-Al-C series composition and a density of 6.90-7.10 g / cm³. 3 The finished steel plate has a yield strength ≥1000MPa, tensile strength ≥1100MPa, elongation ≥20%, and Charpy V impact energy ≥20J at -40℃. The rolled steel plate has good uniformity in shape, thickness tolerance ≤±0.25mm, and flatness ≤4mm / m.

The present application relates to the technical field of archery equipment, and particularly relates to a metal mixed carbon fiber arrow shaft, which comprises a middle carbon fiber pipe, a head stainless steel pipe, a tail metal pipe and a solid connecting piece, the head stainless steel pipe is arranged at the front end of the middle carbon fiber pipe, the tail metal pipe is arranged at the rear end of the middle carbon fiber pipe, and the two are connected and fixed through the solid connecting piece arranged in the middle carbon fiber pipe, and the outside is wrapped with carbon cloth and is formed through high-temperature curing. The present application adopts a segmented metal mixed structure, replaces a long-size metal inner core with a short metal accessory matched with a carbon fiber main pipe, and greatly reduces the difficulty of straightness control. The thickened head stainless steel pipe effectively bears the impact force, the solid connecting piece is in surface contact with the inner wall of the carbon pipe to disperse the stress, and the service life of the arrow shaft is significantly prolonged. The present application has reasonable structure, low cost and high efficiency, and is suitable for manufacturing various archery equipment.

This invention provides a high-strength and high-toughness seamless steel tube for automotive bumper poles and its manufacturing method. The high-strength and high-toughness seamless steel tube for automotive bumper poles comprises an Fe base and chemical elements dispersed in the Fe base in the following mass percentages: C: 0.08–0.22, Si: 0.1–0.45, Mn: 1–1.8, Ni: 0.1–0.6, Cr: 0.05–1, Ti: 0.01–0.05, B: 0.005–0.02, Cu: 0.05–0.5, Al: 0.015–0.06, Nb: 0.01–0.1, N: 0.005–0.015. The high-strength and high-toughness seamless steel tube for automotive bumper poles of this invention exhibits good comprehensive mechanical properties and high dimensional accuracy, especially good straightness, enabling accurate fit with connecting components.

A kind of copper clad steel grounding wire is used to straightening device, it is related to copper clad steel grounding wire straightening technical field, including mounting plate and the support frame for supporting mounting plate, a group of straightening rollers for extruding grounding wire is rotationally arranged on mounting plate, and once straightening area is formed between two straightening rollers, which can be passed through by grounding wire, first sliding plate capable of sliding along the direction perpendicular to the movement direction of grounding wire is arranged on mounting plate, and another straightening roller is rotationally connected with first sliding plate;Multiple auxiliary rollers are arranged on the side of straightening roller away from the entry of grounding wire, and multiple auxiliary rollers are respectively located at the two sides of grounding wire, so that secondary straightening area is formed between the two sides of auxiliary roller of grounding wire, which can be passed through by grounding wire, multiple second sliding plates capable of sliding along the direction perpendicular to the movement direction of grounding wire are arranged on mounting plate, and second sliding plate is located at the same side with first sliding plate, corresponding second sliding plate is rotationally connected with the side auxiliary roller, and the interval between straightening rollers can be adjusted to adapt to grounding wire of different diameters.

The invention provides a correction jig, a correction method, a rotating shaft cover plate and foldable electronic equipment. The correction jig is used for correcting the straightness of a long-strip-shaped part and is provided with a first groove, and the first groove extends in the first direction; in the second direction, the range of the difference value w1-w1'between the width w1 of the first groove and the width w1 'of the long-strip-shaped part is larger than or equal to 0.05 mm and smaller than or equal to 0.1 mm, and the first direction intersects with the second direction. The correction jig is simple in structure.

The invention relates to the technical field of oriented silicon steel cold rolling production, in particular to a cold continuous rolling method and equipment for efficiently producing low-temperature high-magnetic-induction oriented silicon steel. According to the method, efficient and stable production of the thin-gauge low-temperature high-magnetic-induction oriented silicon steel can be achieved, and meanwhile the excellent plate shape and the high-magnetic-induction performance are guaranteed; through cooperative control of targeted roll shape design and process parameters, the problems of edge drop and convexity of the steel strip can be accurately regulated and controlled, the strip shape defect easily occurring in the rolling process of the thin-gauge steel strip is effectively avoided, the finished steel strip has excellent straightness, and the rolling quality of the thin-gauge steel strip is improved. A good foundation is provided for smooth proceeding of subsequent procedures and stacking use of final products; meanwhile, by optimizing texture orientation control in the cold rolling process and combining with an efficient inhibitor formed through subsequent nitriding treatment, the magnetic induction intensity of the finished low-temperature high-magnetic-induction oriented silicon steel is remarkably improved, meanwhile, iron loss is reduced, the magnetic performance of the product is more excellent, and the use requirement of power equipment for efficient soft magnetic materials can be better met.

The application discloses a high-frequency pulse compound direct-current precise micro-TIG arc spot welding power supply and a spot welding method, wherein the power supply comprises a first direct-current power supply, a second direct-current power supply, a high-frequency switching circuit and a control system; the second direct-current power supply is connected with the high-frequency switching circuit, and a pulse current output by the switching circuit is superimposed with direct current output by the first direct-current power supply to provide the arc load; and the control system comprises a DSP controller, a driving circuit, a sampling circuit, a fault detection circuit and the like. The power supply can provide high-frequency pulse current for the micro-TIG arc, improve the transient current density of the micro-TIG arc, and greatly reduce the occurrence of defects such as micro-TIG arc anode spot jumping and easy arc breaking, so that the arc current of stable welding can be reduced to 2A, the stability of the micro-TIG arc and the quality of the spot welding joint are obviously improved, and the application range of the micro-TIG arc welding process is expanded. The application can be widely applied to arc welding power supply equipment.

The present application relates to a kind of 900MPa level magnetic yoke steel plate and its preparation method, wherein the preparation method includes rolling blank into steel strip, and the rolling temperature of final rolling is 820~900 ℃;Two-stage cooling process is used to cool the steel strip after final rolling, wherein, the first stage cooling is to cool the steel strip after final rolling to intermediate temperature 650~750 ℃ according to the cooling speed of 20~40 ℃ / S, the second stage cooling is to cool the steel strip to 250~350 ℃ according to the cooling speed of 90~110 ℃ / S;And the steel strip cooled to 250~350 ℃ is treated to obtain 900MPa level magnetic yoke steel plate.The microstructure of the magnetic yoke steel plate prepared by the present application is two-phase structure of ferrite and martensite, and the strength and toughness are better matched;The magnetic yoke steel plate prepared by the present application has good magnetism.

The application provides a cleaving device and a cleaving method, and relates to the technical field of semiconductors. The first platform and the second platform are arranged, and when the first platform and the second platform move to contact each other, the first platform and the second platform can be used for fixing a product to be cleaved. A cutter can be used to draw a test line on the upper surface of the product to be cleaved. A CCD camera can be used to shoot the test line and display a scratch diagram of the test line. An angle adjusting mechanism can adjust the pitch angle and the rotation angle of the cutter according to the scratch diagram, so that the cutter tip contacts the upper surface of the product to be cleaved at an optimal line drawing angle. The optimal line drawing angle can also be referred to as the angle at which the cutter tip is perpendicular to the product to be cleaved. Therefore, a cleaving line with high precision, good flatness and good stability can be drawn on the product to be cleaved. Even if the cutter is worn, the pitch angle and the rotation angle of the cutter can be adjusted, so that the cutter tip contacts the product to be cleaved at the optimal line drawing angle, and the stability of the cleaving effect is good.

The invention provides a mounting tool for a pin shaft, and relates to the technical field of assembly tools, the mounting tool for the pin shaft comprises a moving trolley, and the moving trolley comprises a base; the support frame is mounted on the base in a lifting manner; the jacking mechanism is installed on the supporting frame and used for jacking the pin shaft to be assembled; wherein the supporting frame has a working state and a moving state, in the working state, the supporting frame descends to make contact with an external supporting body, and in the moving state, the supporting frame ascends and is fixed to the moving trolley. According to the scheme, the pin shaft is stably pressed into the coaxial mounting hole of the frame through the mounting tool, the assembling efficiency and safety of the pin shaft are improved, and the labor intensity of operators is reduced. Meanwhile, when the installation tool is in press-fitting operation, the supporting frame is separated from the moving trolley, trundles of the moving trolley are not pressed, the situation that the trundles of the trolley are damaged by press-fitting counter force is avoided, and the service life of the installation tool is prolonged.

The utility model belongs to the technical field of processing platform, concretely relates to a precision marble platform for full -automatic special -shaped slicing processing, including X -axis, Y -axis and vacuum adsorption platform, X -axis includes X -axis marble base, X -axis linear guide rail, X -axis slide and X -axis linear motor, Y -axis includes Y -axis marble base, Y -axis linear guide rail, Y -axis slide and Y -axis linear motor, X -axis marble base is gantry marble base, and the gantry marble base is fixed on Y -axis marble base, and the perpendicularity of Y -axis and X -axis is less than 5um, and the vacuum adsorption platform is fixed on Y -axis slide, overcome the deficiency of prior art, solve the problem of special -shaped slicing efficiency and precision, easy to maintain, and the response speed of platform can be improved greatly.

The utility model discloses a kind of vehicle body assembly and vehicle, it is related to vehicle technical field, wherein, vehicle body assembly includes: side window sheet metal, for fixing side window glass and setting close to the top of vehicle;Interior roof, with side window sheet metal at the same side of side window glass, the periphery of interior roof close to side window sheet metal is equipped with bending part, bending part is bent towards the direction close to side window sheet metal;Mounting seat, fixed in interior roof;And clamping piece, one end of clamping piece is connected with mounting seat, the other end of clamping piece clamps side window sheet metal, so that interior roof is installed in side window sheet metal by mounting seat and clamping piece.The technical scheme provided by the utility model improves the convenience of interior roof and side window sheet metal assembly, and improves the yield and the aesthetic degree of vehicle.

The application discloses a forming method and device for thick-wall corrosion-resistant alloy pipe with yield strength of 100 steel grade, which comprises the following steps: smelting an electroslag ingot by an electric arc furnace and electroslag remelting; taking scrap steel and alloy as raw materials, smelting an electrode billet by EAF+AOD+LF+VD, and then smelting the electroslag ingot by electroslag remelting. The forming method and device for thick-wall corrosion-resistant alloy pipe with yield strength of 100 steel grade adopts the process route of combining optimized components, electroslag ingot, hot expanding, hot extrusion and cold working to produce thick-wall corrosion-resistant alloy seamless pipe, so that the purity of the alloy is improved, the grain is refined, the solid solution treatment of the strong cold process optimizes the organization and straightness, and the hot expanding and hot extrusion improve the surface quality and the qualified rate of the hollow pipe. The thick-wall corrosion-resistant alloy seamless pipe with yield strength of 100 steel grade produced by the application has high size precision, good surface quality, small internal grain, stable mechanical properties, high strength and high toughness and good corrosion resistance.

The invention relates to the technical field of steel plate processing, and discloses a petroleum pipeline thick-wall steel plate pre-bending and edge rolling all-in-one machine which comprises a machine base, a supporting edge rolling mechanism installed in the machine base and a steel plate sample arranged above the machine base and further comprises two side frames symmetrically arranged on the two sides of the machine base. A synchronous pre-bending mechanism is arranged at the top of the side frame; synchronous and symmetrical pre-bending of the two ends of a steel plate is achieved through the synchronous pre-bending mechanisms arranged on the two sides of the machine base, a lifting autorotation roller and a pitched roof rotating roller which are installed in a trapezoid frame can apply accurate and adjustable bending force to the two ends of the steel plate at the same time, and procedure interruption and reference deviation caused by turning around and secondary clamping in the traditional technology are eliminated; it is ensured that the curvature radius of pre-bending at the two ends is highly consistent with the forming quality, the overall roundness and straightness of the barrel are remarkably improved, and a fundamental guarantee is provided for subsequent efficient edge rolling and high-quality girth welding.

A display device includes conductive layers including wires and conductive patterns in a display area and a pad area, a via layer on the conductive layers, a first electrode and a second electrode on the via layer in the display area and spaced apart from each other, a first insulating layer on the first electrode and the second electrode, light emitting elements on the first electrode and the second electrode spaced apart from each other on the first insulating layer, and a first connection electrode on the first electrode and electrically contacting the light emitting elements, and a second connection electrode on the second electrode and electrically contacting the light emitting elements, each of the conductive layers includes a first metal layer and a second metal layer on the first metal layer, and the second metal layer contains copper and has a grain size of about 155 nm or less.

The application provides a trimming tool. The trimming tool comprises a housing, a cutting mechanism and a driving mechanism, wherein the cutting mechanism has a cutting plane, the driving mechanism is configured to drive the cutting mechanism to operate, and a guard plate is arranged on the housing; an indicating mechanism is arranged on the guard plate, and the indicating mechanism is configured to indicate a deflection state of the cutting plane relative to a reference plane; wherein a straight line extending along the length direction of the cutting plane and parallel to the reference plane is taken as a deflection axis, and the deflection state is a state that the cutting plane is deflected relative to the reference plane around the deflection axis.

The application provides a centerless grinding machine for surface treatment of alloy shaft workpieces, which comprises a centerless grinding machine body, a support frame, an equidistant moving device and a limiting mechanism, and relates to the alloy shaft machining technical field. The support frame and the equidistant moving device are matched and arranged on the feeding side of the centerless grinding machine body. The installation spacing of each group of guide units can be flexibly adjusted according to alloy shaft workpieces of different lengths, the machining requirements of workpieces of various specifications can be met, and through the mutual cooperation of the guide units, the transmission units and the driving units, the bidirectional movement of the alloy shaft workpiece self-rotation and axial advancement can be compatible on the basis of stable multi-point support and limiting of the alloy shaft workpiece, the workpiece stable feeding operation is realized, the problems of workpiece head warping, deviation and grinding vibration in the traditional machining process are effectively eliminated, the workpiece machining radial runout is greatly reduced, and the roundness, straightness and surface smoothness of the alloy shaft workpiece after machining are effectively improved.

This invention discloses a telescopic sleeve for a loading and unloading machine and its processing method. First, the upper flange, lower flange, guide rails, mounting supports, and sleeve tube are rough-machined. Next, two rows of mounting supports are welded to the two opposite sides of the sleeve tube where the straightness is relatively small. Then, a CNC gantry milling machine is used to align and machine concave straight grooves. Next, two guide rails are welded into the two rows of concave straight grooves. Then, the upper and lower flanges are fitted onto the outer stops at both ends of the sleeve tube and positioned and welded. Finally, the entire assembly is precision-machined to complete the processing of the telescopic sleeve for the loading and unloading machine. The telescopic sleeve processed by this invention meets the requirements for straightness, symmetry, and flatness, ensuring the accuracy and tolerance requirements of the design drawings and satisfying the various functional requirements for equipment debugging.

This utility model discloses a user-friendly guide and unhooking clamp for horizontal directional drilling rigs, comprising a base plate. Lifting components are symmetrically arranged at the front and rear ends of the base plate. A guide block is positioned above each of the lifting components. The guide block has an arc-shaped groove inside, and a roller groove is formed along the outer side of the arc-shaped groove inside the guide block. An auxiliary roller is rotatably mounted inside the roller groove of the guide block. A vertical plate is fixedly mounted on one side of the base plate, and a mounting plate base is fixedly mounted on one side of the vertical plate. A unhooking mechanism is provided on one side of the mounting plate base. This design enables the support and guidance of the drill rod, increasing its practicality and solving the problem of insufficient support and guidance for the drill rod in horizontal directional drilling rigs, resulting in poor usability.

The invention belongs to the technical field of straight seam steel pipe machining, particularly relates to a straight seam steel pipe machining method, a straight seam steel pipe manufactured through the straight seam steel pipe machining method, a welding core and a welding flux, and aims to solve the problem of the forming quality of the two sides of a welding seam of the straight seam steel pipe. The processing method of the straight seam steel pipe is characterized by comprising the following steps: rolling for the first time; welding for the first time; rolling for the second time; and welding for the second time. According to the technical scheme, the problem of straight edges on the two sides of a welding seam can be effectively solved, welding seam angular distortion is reduced, and the roundness and straightness of a steel pipe are improved.

A sealed battery gas bag carrying battery device and its mechanical hand mechanism and driving mechanism. The driving mechanism is connected to the end of the module through four columns, three movable modules, reducers and motors, so that the mechanical hand can move in three-dimensional space. The mechanical bottom plate of the mechanical hand mechanism is slidably connected to the two groups of mechanical clamps for clamping the battery through the bidirectional screw rod. The two groups of mechanical clamps are used for clamping the battery, and the front and rear spacing can be changed by adjusting the cylinder and the movable plate connected to the clamp cylinder, and the left and right spacing can be changed by the bidirectional screw rod; the movable plate is provided with a sealing clamp mechanism, the sealing clamp mechanism can move up and down, and the battery and gas bag are clamped and heated by the sealing heating fixed plate provided with a heating rod. The device replaces manual carrying by mechanical carrying, and completes the sealing of the gas bag in the carrying process, optimizes the battery production process, thereby improving the production efficiency, optimizing the battery flatness, and more conducive to improving the equipment production automation level.

The utility model discloses a kind of straightening device for shaft workpiece machining, it includes base, two support frames, measuring piece and straightening piece, two The support frame, the measuring piece and the straightening piece are located on the base, two The support frame is symmetrically arranged, the measuring piece is located above between two The support frame, the straightening piece is located above between two The support frame, the straightening piece and the measuring piece are horizontally placed. The present application has the effect of improving the working efficiency of straightening shaft workpiece.

The utility model belongs to the technical field of steel rolling, and relates to a single-piece feeding device for a rolling mill, which comprises a fixed sliding rail, a fixed sliding rail, a fixed sliding rail and a movable sliding rail, the sliding frame body is arranged on the fixed sliding rail in a sliding manner; the conveying belt is arranged on the sliding frame body in a surrounding manner so as to convey the plate strip to a rolling mill inlet; the embossing roller pressing device is mounted above the conveying belt and is arranged at one end, close to the rolling mill, of the conveying belt; the elastic sliding plate is arranged below the pressing embossing roller device and installed in the sliding frame body, and a clamping space is formed by the elastic sliding plate and the pressing embossing roller device so as to clamp the conveying belt. The fixed sliding seat is mounted on a rack of the rolling mill; the two ends of the push-pull oil cylinder are connected with the fixed sliding base and the sliding frame body correspondingly so as to drive the sliding frame body to move close to or away from the rolling mill along the fixed sliding rail. The single plate strip is firmly pressed on the conveying belt through the pressing embossing roller device, so that the friction force between the plate strip and the belt is obviously increased, and the conveying force is enhanced.

The present application relates to tape measure technical field, provide a kind of thin type coil spring manufacturing process and tape measure, including the following steps, quenching treatment, cryogenic treatment, tempering treatment, roll forming treatment, and the thin type coil spring is prepared;Tape measure includes tape housing, tape reel, thin type coil spring, tape band, mandrel and center nail, thin type coil spring is made by above-mentioned process;Center nail is fixedly connected with tape housing, tape reel can be rotatably set on the outside of center nail, mandrel is fixedly arranged in the inside of tape reel, and mandrel is coaxially arranged with center nail;The inner end of thin type coil spring is clamped and fixed on the outside wall of tape reel, and the outer end of thin type coil spring is hung and fixed on tape band, the space utilization of tape housing is improved in the present application, and the tape band of thickness meeting the use demand can be put in, and the length of tape band is increased.

This utility model relates to the field of sewing machines, specifically to a FIBC (Flexible Intermediate Bulk Container) feeding and sewing machine, including a support table. A sewing machine is mounted on the top of the support table, and a transmission device is mounted on one side of the sewing machine on the top of the support table. A movable plate is mounted on the top of the transmission device. This utility model utilizes a cooperative structure between an arc-shaped block and a connecting frame, and employs a telescopic device to drive the movable plate, which in turn moves the connecting frame. This allows for flexible adjustment of the arc-shaped block's position, facilitating quick installation and adjustment of the FIBC and improving operational convenience. A drive motor rotates a threaded rod, causing the movable block to slide along a guide rail. The contact head on the movable block presses against the inner wall of the FIBC, effectively supporting and positioning the bag. During sewing, this effectively prevents wrinkles or displacement of the bag due to uneven force, ensuring sewing quality. A power drive rotates a drive wheel, which in turn rotates a control turntable, ensuring synchronous operation of the entire device.

The utility model relates to the technical field of laser processing, more specifically, the utility model relates to a kind of honeycomb jacket laser welding equipment, comprising: welding workstation, its first direction's both sides are respectively connected with feeding mechanism and discharging mechanism;Welding mechanism, it has two welding heads, the welding head is located above the welding workstation, and two the welding head can be moved along the second direction perpendicular to the first direction;Pressing mechanism, it is set above the welding workstation, to the plate on the welding workstation is pressed tightly.The utility model provides a kind of honeycomb jacket laser welding equipment that can realize double welding head simultaneous welding, and through the feeding mechanism and discharging mechanism of towed type guarantee the quick feeding and discharging of plate, realize the quick movement of plate, to improve the welding efficiency of honeycomb jacket.

This invention belongs to the field of metallurgical technology, and particularly relates to a 420MPa grade galvanized low-alloy high-strength steel and its production method. The steel composition by mass percentage is as follows: C: 0.06%~0.08%, Si: 0.05%~0.08%, Mn: 0.95%~1.15%, P≤0.025%, S≤0.010%, Al: 0.015%~0.060%, O≤0.0060%, N≤0.0060%, V: 0.01%~0.03%, Ti: 0.01%~0.03%, with the balance being Fe and unavoidable impurities. The advantages are: through V-Ti composite microalloying and controlled hot and cold rolling processes, synergistic effects of fine grain strengthening and precipitation strengthening are achieved. The ferrite grain size is 2~5μm, the (Ti,V)C precipitate size is 20~30nm, the steel plate yield strength is ≥420MPa, and the elongation is maintained above 20%.

This application relates to the field of aerospace manufacturing process equipment technology, specifically to a flexible paperclip winding machine for anodizing aerospace aluminum alloys, and particularly to a specialized tooling with adjustable dimensions for the efficient manufacture of paperclip fixtures. The positioning block is adjustable, allowing for rapid adaptation to the manufacturing needs of paperclip fixtures of different specifications; the guiding system ensures the straightness of the aluminum wire, and mechanical forming guarantees product consistency; manual operation is simple, reducing the skill requirements for operators; it can handle aluminum wire materials of different diameters and is suitable for various aerospace aluminum alloy materials; the winding machine adopts a modular design, allowing for quick replacement of key components, reducing equipment maintenance time and costs.

The utility model discloses a multi-point pressure regulating mechanism of a square and rectangular tube straightening machine, which comprises a bottom plate, a support plate is fixedly mounted at the top of the bottom plate, guide rollers for conveying square and rectangular tubes are respectively and rotatably connected to two ends of the lower part of the front side of the support plate, and a square hole is formed above the middle part of the front side of the support plate; a vertical straightening assembly used for being matched with the guide rollers to straighten the square tubes in the vertical direction is connected to an inner cavity of the square hole in an up-down sliding mode, and transverse straightening assemblies used for straightening the square tubes in the transverse direction are arranged on the positions, located on the two sides of the straightening assembly, of the rear side of the supporting plate. Through the arrangement of the vertical straightening assembly and the transverse straightening assembly, the square tubes are straightened in the vertical direction and the transverse direction at the same time, compared with independent vertical or transverse straightening, straightening work in multiple directions can be completed in one-time operation, the straightening procedures are reduced, the straightening time is shortened, the production efficiency is improved, and the production cost is reduced. And the device is especially suitable for batch production of square and rectangular pipes.