15results about How to "Reduce welding distortion" patented technology

The application provides a straddle type bogie frame and a straddle type monorail vehicle, the straddle type bogie frame comprising a combined beam and a down bending beam, the combined beam comprising a high side beam, a low side beam, a traction beam connecting the high side beam and the low side beam, and an end beam connecting the high side beam and the low side beam, the number of the down bending beams being two, and the two down bending beams being connected with the high side beam and the low side beam respectively, and the combined beam and the down bending beam being connected in a T joint fillet welding and V type butt joint welding mode. The straddle type bogie frame and the straddle type monorail vehicle are formed by combining and welding the combined beam and the down bending beam formed in a split mode, the air chamber is independently formed in the down bending beam, the low side beam and the high side beam are decoupled, the structure is better in stress bearing, and the weld accessibility is better; the combined beam serves as a base, and when the combined beam is combined with the down bending beam, the overall welding deformation is small, the combined beam is not prone to twisting, and the size after welding is easy to control.

The utility model relates to the technical field of cylinder welding supporting, and discloses a cylinder welding hydraulic circle supporting device which comprises a rotating cylinder, an air cylinder is fixedly connected to the interior of the rotating cylinder, a fixing ring is fixedly connected to the outer wall of the air cylinder, a pushing piece is fixedly connected to the output end of the air cylinder, and a first rotating shaft is rotationally connected to the interior of the pushing piece. A first rotating block is fixedly connected to the outer wall of the first rotating shaft, a second rotating shaft is rotatably connected to the interior of the first rotating block, an inner supporting plate is fixedly connected to the outer wall of the second rotating shaft, a first rotating rod is fixedly connected to the interior of the inner supporting plate, and a second rotating block is rotatably connected to the outer wall of the first rotating rod. According to the welding device, the air cylinder is started to push the push piece to slide, the first rotating shaft, the first rotating block, the second rotating shaft, the inner supporting plates, the first rotating rod and the second rotating rod are matched, the four inner supporting plates are used for supporting the cylinder body, and the effects that pressure is evenly applied through the inner supporting plates, and it is guaranteed that the cylinder body is always kept round in the welding process are achieved.

The application discloses a construction method of a space special-shaped tree column structure, which comprises the following steps: after a layer of steel rod members are installed and a first layer closed loop structure is formed, the steel rod members are continuously assembled to the next layer; after the steel rod members of the next layer form a second layer closed loop structure, butt joints of vertical rod members of the steel rod members of the first layer closed loop structure are welded; after the butt joints of the vertical rod members are welded, butt joints of horizontal rod members of the layer of steel rod members are welded; after the butt joints of the horizontal rod members are welded, the next layer of steel rod members is continuously assembled on the basis of the second layer closed loop structure; after a third layer closed loop structure is formed, the butt joints of the steel rod members of the second layer closed loop structure are welded; and the welding is sequentially and intervally performed until the last layer of steel rod members is welded. The application can reduce or avoid the welding seam deformation of the complex space special-shaped structure, and greatly improves the construction quality.

This invention discloses a method for unsteady-state ultrasonic standing wave-assisted control of fusion welding. It utilizes dual ultrasonic transducers to perform dual-wave interference, forming an ultrasonic standing wave. This ultrasonic standing wave is introduced into the fusion welding process, and its action on the welding area allows for real-time control of the microstructure and properties of different parts of the weld joint. This forms a unsteady-state ultrasonic standing wave with controlled directional movement of the wave packet nodes, which is then used to regulate the microstructure and properties of the weld joint. This invention enables control over the direction and speed of movement of the unsteady-state ultrasonic standing wave wave packet nodes, allowing for regional control of the microstructure and properties of different parts of the weld joint, resulting in a more uniform joint composition and microstructure. It can solve problems such as undercut, burn-through, high residual stress, severe deformation, and columnar crystals that reduce joint performance during the welding of thin materials or fine wires, refining grains and improving joint performance. It can achieve controllable connections from the centimeter scale to the micrometer scale.

This invention relates to the field of marine engineering and shipbuilding technology, and in particular to a construction process for the pile legs of a self-elevating wind power installation platform. The unfolded cutting length of the cylindrical steel plate is L1 = DP + δ1 + δ2 - δ4. The allowance on both sides of the steel plate is L2 = L3 + δ1 + δ2 = L3 + 4 based on the width of a single cylindrical section. The cutting must ensure that the straightness error is no greater than 1 / 1000 and ≤5mm, the perpendicularity error in the plate thickness direction is no greater than 1mm, the cutting bevel angle error is ±1°, the cutting depth is no greater than 0.5mm, and the parallelism of the unfolded cutting line is less than 2mm. Thin-layer, narrow-channel, multi-pass welding is used during welding, which can effectively reduce welding deformation and avoid incomplete fusion and slag inclusion defects in full penetration fillet welds. The welding qualification rate is over 98%, which not only has good quality, but also reduces deformation caused by repair welding, reduces costs, and shortens the construction period.

This invention relates to a method for controlling welding deformation of the rear floor assembly of an aluminum alloy body-in-white. The invention designs a method for controlling welding deformation of the rear floor assembly of an aluminum alloy body-in-white by controlling welding process parameters, clamping positions, and welding sequence, thereby reducing the degree of deformation of the aluminum alloy rear floor assembly profile during welding. After optimization, the average absolute value of the final welding deformation of the aluminum alloy rear floor assembly is reduced from 1.659 mm to 0.735 mm, a reduction of 56%, significantly lowering welding deformation. The significantly reduced welding deformation of the aluminum alloy rear floor assembly of this invention ensures welding quality and dimensional accuracy.

The present application relates to the technical field of automobile differential, and particularly relates to an assembling method of a laser-welded differential assembly, a welding groove is formed along an axial direction at a connecting position of a main reduction driven gear and a differential housing, the main reduction driven gear and the differential housing are welded at the welding groove by a laser filler wire welding mode, and the welding groove is provided as an asymmetric structure, wherein a welding wire in the laser filler wire welding is a nickel-based welding wire, the welding groove is a Y-shaped groove in an asymmetric structure, the Y-shaped groove comprises a gear side slope surface and a housing side slope surface at an opening end, and the gear side slope surface and the housing side slope surface meet into a welding through hole extending along the axial direction at a side away from the opening. The present application provides a relationship of welding performance of the differential housing material, a method for calculating a carbon equivalent of spheroidal graphite cast iron welding, and a welding guidance method. The assembling between the differential housing and the main reduction driven gear is performed by the laser filler wire welding technology, so that the cost can be reduced, the light weight can be realized, and the reliability can be enhanced.

This invention discloses a welding device for automotive rear axle housings, belonging to the field of rear axle housing welding technology. It includes a base, with a chuck fixing seat fixedly mounted on one side of the top of the base. A stepper motor is fixedly mounted inside the chuck fixing seat, and the output end of the stepper motor extends out of one side of the chuck fixing seat and is fixedly connected to an electric chuck. By setting the chuck fixing seat and the internal stepper motor and electric chuck on the top of the base, and cooperating with the first electric telescopic rod, rotating seat, and clamping sleeve on the clamping frame, precise clamping of both ends of the rear axle body is achieved. Simultaneously, the two third electric telescopic rods and the pre-clamping frame in the pre-clamping mechanism pre-position and support the middle section of the rear axle body, forming a three-point positioning structure of "fixed ends + middle section support." This structure significantly improves the positioning accuracy and stability of the rear axle body, effectively reduces welding deformation, and improves the quality of the welded joint and the overall strength of the rear axle housing.

The application discloses a flared X-shaped groove welding joint and a process method, wherein the joint comprises a front groove and a back groove in a symmetrical structure; a land is arranged in the direction of the front groove from the back groove root face cleaning starting position; the back groove is locally provided with a platform; the platform is provided with an opening, and the root face cleaning operation is facilitated. The welding depth of the front groove is h1=t / 2+x-c / 2; the welding depth of the back groove is h2=t / 2-x+c / 2; wherein t is the plate thickness, x is the root face cleaning depth, and c is the land thickness. The process method comprises joint design, joint assembly, front groove and back groove welding; the flared X-shaped groove welding joint and the process method have the advantages of fewer root face cleaning steps, unchanged root face angle after root face cleaning, fewer internal defects of the welding seam, high angle trimming efficiency, and the welding quality and the welding operation efficiency are remarkably improved.

This utility model discloses a welding assembly fixture for a standard section assembly of a tower crane, specifically relating to the field of tower crane manufacturing technology. It includes a base, a main chord angle steel member on the top of the base, a support plate fixedly mounted on the top of the base, a node plate on the top of the support plate, and a positioning mechanism on one side of the support plate. The positioning mechanism includes a fixing block fixedly mounted on one side of the support plate, and support frames fixedly mounted on both sides of the fixing block. A small stepper motor is fixedly mounted on the top of one support frame, and a rotating shaft is fixedly mounted on the output end of the small stepper motor. The other support frame is rotatably connected to one end of the rotating shaft, and multiple positioning plates are fixedly mounted on the outside of the rotating shaft. This utility model ensures precise installation of the node plate and enhances stability. The insertion of the positioning pins into the fixing holes restricts the displacement of the node plate, providing a stable foundation for welding. It is flexible in operation and has versatility.

The utility model relates to a split type frame structure of motorcycle belongs to motorcycle frame technical field. Including front frame, the rear end at front frame is equipped with the connecting pipe, the both sides of front frame are composed by left side beam pipe and right side beam pipe, the both ends of connecting pipe are fixed link with the inboard of left side beam pipe and right side beam pipe, the both ends at connecting pipe are equipped with the fixed link's first connecting portion, the last end at left side beam pipe and right side beam pipe is equipped with the fixed link's second connecting portion, be equipped with rear frame on first connecting portion and second connecting portion, the junction of rear frame and first connecting portion and second connecting portion carries out the connection through bolt, in this scheme, welding is carried out separately to front frame and rear frame, then two frames are assembled together through bolt structure, solve the technical problem that the whole frame in the prior art is too long, lead to the technical problem that easy deformation after welding, reduce welding deformation, improve dimensional accuracy, can also increase the whole frame elasticity.

The application provides a method and device for double-kidney-shaped light spot laser narrow-gap welding, and the method comprises the following steps: (1) performing base layer welding in the welding space of a workpiece to be welded, and performing weld cleaning to obtain a first welding piece; the weld of the workpiece to be welded comprises a weld surface and a groove surface on the weld surface; (2) performing double-kidney-shaped light spot laser welding in the welding space of the first welding piece, wherein the light spot of the double-kidney-shaped light spot laser welding simultaneously acts on the side wall of the groove surface and the corner of the weld surface of the workpiece to be welded, the welding wire is swung in the process, the first pass of the filling layer is completed, and then the weld is cleaned; and (3) repeating step (2) until the welding is completed. The application has excellent welding effect for low-temperature steel with a narrow gap, and can be applied to the welding of nuclear fusion steel.

The present application relates to the technical field of automobile seat production equipment, and particularly relates to a welding device for automobile seat production, which comprises a welding console and an automobile seat framework, the automobile seat framework is placed at the middle part of the top end of the welding console, the two ends of the top end of the welding console are respectively slidably connected with horizontal translation tables, the outer sides of the horizontal translation tables are provided with horizontal clamping limiting mechanisms for accurately positioning the two sides of the automobile seat framework, the top parts of the two horizontal translation tables and the ends far from the centers are fixed with mechanical arm sliding rails, the top end of each mechanical arm sliding rail is slidably connected with a mechanical base, and the upper part of the mechanical base is assembled with a welding head for welding the automobile seat framework; the three-dimensional positioning system of "horizontal, back and leg support" is adopted to solve the limitation of the single two-side pressing of the existing device, and the three-point clamping of the back positioning mechanism is adopted when welding the backrest connecting part, so that the back positioning is accurate.

This invention discloses a welding method for long straight welds on the main structural components of mining excavators. A reverse-deformation hydraulic tool is used to hydraulically compress and reverse-deform the base plate of the main structural component by 7-9mm, offsetting the deformation of the base plate caused by the welding of the four long straight welds. This achieves the machining flatness requirement of less than or equal to 3mm for the base plate after welding, eliminating the need for a post-weld shaping process. The preheating temperature for each weld layer of the long straight welds is 100℃-150℃, and the interlayer temperature must be maintained above 100℃ during welding. A symmetrical welding sequence is used. After the main structural component is fully welded, it undergoes vibration aging treatment, followed by ultrasonic impact treatment of the weld toes of the long straight welds, and finally magnetic particle testing. This invention solves the problems of base plate deformation caused by welding long straight welds on the main structural components and the increased residual stress and significantly reduced fatigue life of the welds due to reverse-deformation welding.