66results about How to "Increase clamping force" patented technology

The invention belongs to the technical field of high-speed rotary tables, and discloses a high-stability high-speed rotary table for a milling machine and an operation method thereof.The high-stability high-speed rotary table comprises a rotary table top disc and a rotary table base, the rotary table base is located below the rotary table top disc, and a sleeve hole and a first groove are formed in the top face of the rotary table top disc. The upper portions of the adjusting assemblies which are in relative spiral sleeve connection are made to independently move upwards, the multiple clamping assemblies are driven to move upwards, in cooperation with forming of first grooves, the first clamping rods for actually clamping a workpiece at the top of the rotary table top disc can be accurately adjusted up and down, and therefore when the workpiece is actually clamped, according to the height condition of the top machining end of the workpiece, the machining efficiency is improved. The actual clamping position is adjusted, so that the workpiece is stabilized at the gravity center distribution position of the workpiece during clamping and fixing, better stability is achieved when the workpiece is matched with high-speed rotation and external stress machining under clamping, the application range of workpiece clamping rotation is widened, and meanwhile the stability of a high-machining workpiece under actual high-speed rotation is further improved.

A saddle with a backrest capable of being adjusted in multiple directions comprises a supporting frame, the bottom of the supporting frame is connected with a cushion through an installation base, the two sides of the lower portion of the installation base are connected with an upper adjusting base and a lower adjusting base, the upper adjusting base and the lower adjusting base define an adjusting hole, and the supporting frame is installed in the adjusting hole in a sliding mode; locking holes are formed in the upper adjusting seat and the lower adjusting seat in a penetrating mode, and a locking screw is inserted into the two locking holes in a penetrating mode to lock the relative position between the cushion and the supporting frame. And a backrest is movably connected to the upper part of the support frame. The multi-direction and multi-degree-of-freedom adjustable seat has the advantages that the seat cushion and the backrest can be adjusted in multiple directions and multiple degrees of freedom, a user can adjust the seat cushion and the backrest in multiple directions according to requirements, personalized comfortable support is provided, adaptability is high, and riding safety is improved. Meanwhile, adjusting operation is convenient and fast, the adjusting difficulty is low, a user can quickly and easily complete the adjusting operation, and the use convenience is improved.

The utility model belongs to the technical field of power tool turrets, and particularly relates to a numerical control machine tool slant bed power tool turret turning and milling composite machine tool which comprises a numerical control turning and milling composite machine tool body, a power tool turret is arranged on the inner wall of the numerical control turning and milling composite machine tool body, and a motor installation groove is formed in the inner wall of the power tool turret. Servo motors are installed on the inner wall of the power tool turret, one servo motor is installed on the inner wall of the motor installation groove, a thermal shrinkage tool handle is installed at the output end of the servo motor, and a tool bit is movably connected to the inner wall of the thermal shrinkage tool handle. By arranging the thermal shrinkage cutter handle and utilizing the principle of thermal expansion and cold contraction, the cutter head is installed during heating and tightly held after cooling, vibration transmission can be reduced, the machining precision can be improved, errors can be automatically compensated, the coaxiality is ensured, the service life of the cutter head is prolonged, the surface quality is improved, the clamping force is higher, the cutter head can be effectively prevented from loosening, and the machining yield of fragile materials is improved.

The utility model relates to the technical field of clamps, in particular to a windproof clamp for awning cloth. The awning cloth windproof clamp comprises a concave frame, a clamping plate is placed on the top of the inner side wall of the concave frame, fixing columns are evenly arranged at the bottom of the clamping plate, second fixing teeth are evenly arranged on the left side of the bottom of the clamping plate, and fourth fixing teeth are evenly arranged on the right side of the bottom of the clamping plate. Fixing holes are uniformly formed in the bottom of the inner side wall of the concave frame in a penetrating manner; according to the utility model, through the fixing teeth and the fixing columns which are uniformly distributed in the concave frame, the contact area between the tarpaulin and the clamp can be greatly increased, and meanwhile, the hand-screwing bolts which are uniformly distributed on the clamping plates are matched, so that stable downward pressure can be provided for the clamping plates, and the clamping force of the clamp on the tarpaulin is further increased; and then the hand-screwing bolt is fixed through the anti-loosening assembly, so that the clamping stability of the clamp on the awning cloth is improved, and the windproof performance of the awning cloth fixed by the clamp is improved.

The utility model provides a kind of special pipe-laying device for roof gas drilling, including main gasket, the conical gasket is fixedly installed in main gasket front side, the mounting bracket is fixedly installed in main gasket side wall, the first bolt is penetrated and set in mounting bracket inside, and is threadedly connected with it, the clamping assembly is arranged in main gasket inside, for clamping hole sealing pipe, sliding limiting assembly in mounting bracket inside, for increasing the stability of device, through independent clamping assembly pertinence solution φ73mm drill rod and the radius difference problem of φ63mm hole sealing pipe, double locking of cooperation block and card slot and the anti-channeling design of wedge structure, make hole sealing pipe clamping force effectively promote, eliminate down channeling risk of hurting people, clamping assembly is convenient for quick dismounting, it is convenient for staff to install and replace, guarantee the clamping effect of device, the sliding adaptation design of connecting frame is compatible with different drilling machine chuck, increase the practicability of device.

The utility model discloses a kind of flat steel clamping assembly structure, including assembly groove and clamp, clamp includes two clamping pieces oppositely arranged along assembly groove extension direction, each clamping piece sequentially includes locking portion, clamping portion and with the stop portion of assembly groove cooperation, the clamping space for fixing flat steel is enclosed between the clamping portion of two clamping pieces and assembly groove;Clamping portion is L-shaped as a whole, including the first clamping section and the second clamping section of mutual connection, the end of first clamping section away from the second clamping section is connected with locking portion, the end of second clamping section away from first clamping section is connected with stop portion, locking portion and stop portion extend in direction of away from first clamping section, the end of first clamping section and locking portion compared with the end of first clamping section and second clamping section connection is inclined to the inside of clamping space. The above structure effectively improves the convenience, flexibility, reliability and versatility of flat steel clamping structure / device actual use.

This invention relates to the field of connector technology, and more particularly to an FPC connector assembly, including a male end and a female end. The male end includes a male terminal and a male socket for mounting the male terminal. The female end includes a female terminal that inserts into the male terminal and a female socket for mounting the female terminal. The front end of the female terminal is provided with an elastic element for elastically clamping the front end of the male terminal. When the front end of the male terminal is inserted into the female terminal, the elastic element undergoes elastic deformation to maintain the clamping force on the male terminal. The female socket is provided with a constraint mechanism corresponding to the female terminal. When the front end of the male terminal is inserted into the female terminal, the male terminal drives the constraint mechanism to compress the corresponding elastic element to increase the clamping force of the elastic element on the male terminal. This solution, by auxiliaryly pressing the free end of the arc-shaped spring, can prevent the decrease in clamping force caused by the decrease in the elasticity of the arc-shaped spring, effectively improving the clamping force of the arc-shaped spring of the female terminal on the male terminal and maintaining good contact between the male and female terminals.

The utility model discloses a self-plugging rivet, which belongs to the technical field of rivet connecting pieces and aims to solve the problem that a rivet sleeve of an existing self-plugging rivet swells and is specially shaped in the installation process, the self-plugging rivet comprises a core rod (1) and the rivet sleeve (2) which are sleeved inside and outside, and the inner circumferential surface of the rivet sleeve (2) comprises an inner large-diameter section (23), a rear circular ring surface (24) and an inner small-diameter section (25) which are sequentially connected from front to back. The inner diameter of the inner large-diameter section (23) is larger than the inner diameter of the inner small-diameter section (25) by 8%-16%, and the length of the inner large-diameter section (23) is 1.1-1.3 times of the outer diameter of the body section (27). The inner circumferential face of the front portion of the rivet sleeve of the self-plugging rivet is designed to be of the step-shaped structure, the local softening difficulty of the rivet sleeve is reduced, bulge deformation formed after the rivet sleeve is pressed can become ideal large-curvature deformation more easily, the occurrence of the bulge special-shaped situation can be reduced, the contact area between a bulge and an interlayer can be increased, and the service life of the self-plugging rivet is prolonged. Therefore, the riveting pre-tightening force and the riveting stability are improved.

The utility model belongs to the technical field of high-speed motorized spindle production and machining, and particularly relates to a pressing and locking device for drilling in high-speed motorized spindle production and machining, which comprises a mounting plate, a toggle clamp pressing mechanism and a pressing supplementing mechanism, and the pressing supplementing mechanism is mounted on the toggle clamp pressing mechanism and vertically corresponds to a groove seat. The groove seat is fixed on the mounting plate, and the toggle clamp pressing mechanism is mounted on the mounting plate. Through linkage matching of the toggle clamp downward pressing mechanism and the downward pressing supplementing mechanism, rapid clamping and fixing of the electric spindle can be achieved, the toggle clamp downward pressing mechanism provides main clamping force, and the requirement of industrial production for clamping efficiency is met; and the downward pressing supplementing mechanism adjusts and enhances the clamping force through a pressure compensation mechanism when the fixed groove pressing plate is abraded, so that the positioning stability in long-term use is ensured, and the positioning precision in the drilling process is also ensured. According to the design, the adaptability of the device to motorized spindle machining is remarkably improved, and meanwhile operation convenience and process reliability are both considered.

The application discloses a 505 / 95R29 special high-load radial tire for nonferrous mine and a production process thereof, and relates to the technical field of tires. The application is characterized in that a concave V-shaped structure is arranged at the tire shoulder and the tire side, the transverse pattern groove of the tire tread extends to the tire side and is provided with a heat dissipation groove; the ring part is designed with full interference and is provided with anti-skid protrusions; a five-layer belt structure is adopted, the B1 belt layer is a two-piece small-angle split structure, and nylon reinforcing layers are arranged on both sides of the tire body. The application fills the design and development blank of the 505 / 95R29 special high-load radial tire for nonferrous mine by developing a new 505 / 95R29 special high-load radial tire for nonferrous mine and adopting a new production process, and solves the problems of insufficient load capacity of the current product of the large-tonnage wide-body vehicle and high failure.

The utility model belongs to battery shell injection moulding technical field especially a injection moulding mechanical hand for battery shell injection moulding industry, including frame, the inside of frame is provided with rotating device, rotating device includes detection sensor, detection sensor passes through high speed camera and combines image processing algorithm and judges battery shell placement direction, through setting clamping device, the clamping of battery shell is carried out, the telescopic rod of electric push rod telescopic drive slider to lift, when slider rises, the compressed stainless steel spring makes the clamping block reset, thereby makes two clamping blocks relative motion, clamps the battery shell, and the silicon layer is fixedly bonded, and the silicon layer is contacted with the battery shell, improves the clamping force and avoids the damage to the battery shell surface, the descending of slider, drives the clamping block to move back, thereby releases the clamping fixation to the battery shell.

The utility model relates to the technical field of feeding of chip mounters, in particular to an automatic feeding mechanism of a chip mounter, which comprises a clamping frame, two clamping plates, a feeding tray and a driving piece, the two clamping plates are symmetrically arranged in the clamping frame, the opposite sides of the two clamping plates are respectively and fixedly connected with a first elastic plate, and the two clamping plates are arranged in the clamping frame. Clamping plates are arranged on the clamping frame, two second elastic plates are installed on the opposite sides of each clamping plate at intervals, clamping grooves are formed in the two sides of the feeding tray correspondingly, limiting grooves are formed in the inner walls of the two sides of each clamping groove correspondingly, guide faces tangent to the limiting grooves are formed in the inner walls of the limiting grooves, and a driving part is arranged on the clamping frame and is in driving connection with the two clamping plates; the driving part is used for driving the two clamping plates to move oppositely, and when the driving part pushes the clamping plates to move towards the feeding tray, the first elastic plates elastically abut against the inner walls of the corresponding clamping grooves. According to the utility model, under the condition of bidirectional limiting, through a buffer mechanism, the situation that the tray or components are damaged due to mechanical impact is avoided.

The utility model discloses a special fixture for a multi-station sample milling machine, which comprises a support, a supporting mechanism and a clamping mechanism, and the supporting mechanism realizes self-adaptive supporting and resetting of an aluminum sample through a vertical plate, a transverse plate, a guide shaft and a spring; the clamping mechanism drives a movable clamping plate through a first air cylinder, multi-station synchronous clamping is achieved in cooperation with a V-shaped clamping groove and an anti-skid groove of a fixed clamping plate, and the clamping state is monitored in real time through a front sensor and a rear sensor. The clamp can clamp aluminum samples with different diameters and heights, the supporting plate can adjust the heights of the aluminum samples to keep consistent, follow-up sample milling is facilitated, the problems that traditional clamping is low in efficiency, poor in stability and poor in adaptability to the aluminum samples with different specifications are solved, and the clamp has the advantages of being reliable in state detection, high in specification adaptability and the like. The aluminum sample milling device is suitable for efficient and safe milling of aluminum samples, and the consistency of the milling effect can be guaranteed.

This utility model discloses a large-diameter pipe installation and handling device, including a mobile lifting frame for moving the pipe. The mobile lifting frame includes: four columns with rollers at the bottom, a horizontal beam plate fixedly connected to the four columns, a gripping mechanism for gripping the pipe wall, and a lifting mechanism for lifting the pipe. The lifting mechanism includes a lifting plate and a lifting drive mechanism for driving the lifting plate to move up and down. Two or more vertical guide columns are fixedly connected to the beam plate, extending downwards from the bottom of the beam plate. The lifting plate is located below the beam plate and has guide holes that slide with the guide columns. The lifting drive mechanism includes a fixed part and a movable part that moves relative to the fixed part. The lifting plate is fixedly connected to the movable part, and the beam plate is fixedly connected to the fixed part. The lower surface of the lifting plate has double slide rails with the axis in the front-back direction. The double slide rails face each other left and right. This utility model can lift and fix the pipe, achieving a hoisting function, thus enabling the handling of large-diameter pipes in situations where a crane is unavailable.

The wrench comprises a shell, a driving wheel, driven wheels and a handle, a plurality of round holes are formed in one side of the shell, the round holes are evenly distributed in the circumferential direction of the shell, a connecting hole is formed in the center of the other side of the shell, a plurality of driven wheels are arranged, the edge of one side of each driven wheel is fixedly connected with a clamping rod, and the handle is fixedly connected with the clamping rod. The clamping rods are evenly distributed in the circumferential direction of the driving wheel, the handle is rotationally arranged in the connecting hole in a sleeved mode and fixedly connected with the driving wheel, through the arrangement of the clamping rods, a clamping structure of a water pipe connector (a bolt pipe) is formed, and through a transmission structure of the driving wheel and the driven wheel, the water pipe connector (the bolt pipe) is clamped. The clamping rods can clamp the outer wall of the water pipe connector or extend into a water pipe to clamp a broken part, the clamping force can be continuously improved along with continuous rotation of the driving wheel until the water pipe connector or the broken part is driven to rotate, the water pipe cannot be abutted in the process, namely, internal threads of the water pipe cannot be damaged, and the dismounting efficiency is improved.

The utility model provides a clamping tool for stator machining, which comprises a base plate, an adjusting mechanism is arranged on the base plate, a clamping assembly is arranged on the adjusting mechanism, the clamping assembly comprises a pair of clamping plates arranged on the adjusting mechanism, and the adjusting mechanism can adjust the two clamping plates to move oppositely. According to the utility model, the two clamping plates can be conveniently and efficiently adjusted in opposite directions through the adjusting mechanism, so that the clamping and fixing operations of stators with different specifications and diameters are realized, the fixing efficiency in stator processing is greatly improved, and the working efficiency is improved. And the processing quality is improved.

This invention relates to the field of measurement probe technology and discloses a probe mounting structure for a hot and cold stage. The structure includes a hot and cold stage, with several probe arms inside. An adjustable displacement stage is mounted on the outside of the stage, with its moving end connected to one of the probe arms. A probe body is detachably mounted on each probe arm, and a mounting hole is provided in the probe arm. A clamp is installed in the mounting hole, and a mounting groove is provided at the upper end of the probe body. The probe arm is clamped and fixed by the clamp, and the mounting groove engages with the clamp. The annular clamping structure composed of the first and second clamping plates in this design can restrict the probe body at all angles, effectively preventing the probe body from shaking due to external forces, temperature changes, or its own vibration during use. This ensures that the probe body maintains a precise position and orientation during measurement and detection operations, improving the accuracy and reliability of the measurement data.

The utility model provides a press-fitting conducting ring and a motor, and belongs to the technical field of conducting rings, the press-fitting conducting ring comprises an annular piece, and the annular piece is provided with at least one press-fitting hole; one part of the conductive fiber bundle is arranged in the metal pipe in a penetrating manner, the metal pipe tightly hoops the conductive fiber bundle, the inner pipe wall of the metal pipe is attached to the conductive fiber bundle, the metal pipe is inserted into the press-fitting hole, and the metal pipe is in interference fit with the press-fitting hole; the beneficial effects of the utility model are that the conductive fiber bundle can be implanted into the metal tube and forms the conductive brush in a pre-riveting manner, then the conductive brush can be pressed into the press-fitting hole, and in the press-fitting process, the metal tube shrinks and deforms due to the radial extrusion force of the press-fitting hole, so that the metal tube is in interference fit with the press-fitting hole, and the press-fitting effect is improved. The metal pipe and the annular piece are fixed together, the deformed metal pipe firmly hoops the conductive fiber bundle, and the metal pipe and the conductive fiber bundle are combined together in a surface contact mode, so that the conductive performance and the riveting strength are ensured, and the conductive fiber bundle cannot be broken.

The invention relates to the field of liquid or fluid sampling devices, in particular to an automatic loading and unloading device for a temperature measurement sampling probe and a using method thereof. The automatic loading and unloading device for the temperature measurement sampling probe comprises a robot (1) and a probe (2), a gripper (12) is arranged at the outer end of an operating arm (11) of the robot (1), the gripper (12) holds the probe (2), and the automatic loading and unloading device is characterized by further comprising a bottom plate (3), a guide cone (4) and a clamping device (5), and the bottom plate (3) is vertically arranged; the guide cone (4) is in a horn shape, the small round end of the guide cone (4) serves as the bottom to be fixed to the bottom plate (3), and the connector (13) is arranged above the top of the guide cone (4). The clamping devices (5) are movably buckled on the two sides of the bottom plate (3) through the inner ends and arranged below the bottoms of the guide cones (4), the spring shifting pieces (51) and the anti-skid plates (52) are sequentially embedded in the middles of the clamping devices (5), and anti-skid teeth (521) are arranged on the side faces of the anti-skid plates (52). The application method of the automatic loading and unloading device for the temperature measurement sampling probe comprises the steps of mounting and dismounting. The device is high in automation degree and reliable in assembly and disassembly.

The utility model discloses a hydraulic pressure oil cylinder processing automatic turnover equipment, including the processing platform, the middle part fixed bearing seat of processing platform has, bearing seat is connected with the first pivot of rotation, is connected with the support column on the first pivot, the upper end of support column is connected with the second pivot of rotation, and the upper end of second pivot is connected with the inner wall clamping mechanism. The both ends of processing platform can install processing equipment, through the inner wall clamping mechanism and clamps the oil cylinder after, through the control first pivot rotation, can adjust the angle of oil cylinder, through the work of second motor, can drive the inner wall clamping mechanism rotation to drive the oil cylinder rotation to adjust the processing surface of oil cylinder, realizes the multi -direction, multi -angle processing to the oil cylinder.

This application relates to a friction braking system for a vehicle. The proposed friction braking system includes a first gear unit having a first component and a second component. The first gear unit is configured to convert rotational motion of the first component into braking motion of the second component. Furthermore, the first component is configured such that the rotational motion can be driven by an electric motor. The braking system also includes a second gear unit having a spindle and a nut for converting the rotational motion into linear motion for brake pad wear compensation. The spindle can be connected to a brake pad. The second component of the first gear unit and the nut of the second gear unit are or can be mechanically connected such that during braking motion, the second component of the first gear unit pushes against the nut of the second gear unit to press the brake pad against a friction surface. Furthermore, the first gear unit and the second gear unit are or can be arranged such that the second gear unit at least partially penetrates the first gear unit.

The embodiment of the utility model discloses a hoisting tool and a hoisting assembly. The hoisting tool comprises a plurality of toggle clips, the multiple toggle clips are provided with circumferential side walls, and the inner surface of at least one circumferential side wall is provided with a limiting section which extends in the circumferential direction. When in the clamping working condition, the multiple toggle clips are sequentially connected, so that the multiple circumferential side walls define a containing cavity used for containing a workpiece, the containing cavity is at least provided with an opening in one side, and the limiting section is located in the containing cavity and used for clamping the workpiece. The hoisting tool is provided with a plurality of split type toggle clips, the multiple toggle clips can be matched with one another to form the containing cavity under the clamping working condition, the limiting section in the containing cavity is connected with the workpiece in a clamped mode so as to clamp the workpiece, the workpiece does not need to be additionally machined, the manufacturing cost is reduced, and meanwhile, the machining efficiency is improved. The reasonable structural design can avoid hoisting failure and workpiece falling caused by vacant connection.

This utility model discloses a rotary joint with a foolproof structure and a robot. The rotary joint includes a joint housing, the interior of which forms an assembly cavity. A joint motor is interference-fitted into the assembly cavity. A cylindrical hole is provided on the side wall of the joint housing, and a cylindrical pin is disposed in the cylindrical hole, extending upward from the opening of the cylindrical hole. In this utility model, by providing a cylindrical pin and extending it upward from the opening of the cylindrical hole, a foolproof positioning structure can be formed, enabling foolproof positioning during the assembly of the joint motor and the safety brake.

The utility model relates to the technical field of welding, in particular to an anti-sparking ground wire clamp of an electric welding machine, which comprises an upper clamping plate, a lower clamping plate, an adjusting bolt, a fixing rod, a rotating handle and a wire clamping component. An adjusting unthreaded hole and an installing unthreaded hole are formed in the lower clamping plate corresponding to the adjusting screw hole and the fixing rod respectively, an adjusting bolt with the upper portion fixedly installed in the adjusting screw hole through threaded connection is arranged in the adjusting unthreaded hole, a rotating handle is fixedly installed at the upper end of the adjusting bolt, and the lower portion of the fixing rod is located in the installing unthreaded hole; a clamping area capable of clamping a to-be-welded weldment is formed between the lower side of the left portion of the upper clamping plate and the upper side of the left portion of the lower clamping plate, and a wire clamping assembly capable of being connected with a grounding wire is arranged at the right end of the upper clamping plate. The device is reasonable and compact in structure and convenient to use, the distance between the upper clamping plate and the lower clamping plate is adjusted through the adjusting bolt by rotating the rotating handle, and therefore the upper clamping plate and the lower clamping plate are clamped on a weldment to be welded; by arranging the anti-skid teeth, the overall clamping force of the tool is enhanced, it is ensured that a weldment can be firmly clamped in the welding process, and the tool has the advantages of being stable, efficient and good in noise reduction effect.

The utility model relates to water quality detection technical field especially relates to a sampling appearance for chemical industrial sewage water quality detection, a sampling appearance for chemical industrial sewage water quality detection, including sampling box and clamping unit, the top of sampling box is equipped with handheld part, sampling box is hollow and one side open structure, is equipped with a plurality of water holes on every lateral wall, clamping unit sets up in sampling box, and it is used for clamping sampling bottle, a sampling appearance for chemical industrial sewage water quality detection of the utility model, the fixed ring is driven under the electric telescopic link, and it is convenient to seal and cover sampling bottle, avoids the situation of manual sealing and cover as far as possible, and convenient clamping operation uses, is favorable to the improvement device sampling's work efficiency, is favorable to the improvement device's clamping capacity, is favorable to reducing the labor intensity of staff.

The utility model discloses a large cross-section conductor resistance test fixture, which comprises a fixture table, an upper chuck, a lower chuck and an operation box, the top surface of the fixture table is fixedly connected with the lower chuck, the interior of the operation box is slidably connected with a lifting platform, the lifting platform is in threaded connection with a lead screw, an input shaft at the top end of the lead screw is fixedly connected with a main operation board, and the main operation board is connected with an output shaft. A moving column is fixedly connected to the lifting table, an upper chuck is fixedly connected to the bottom end of the moving column, in addition, a gear is fixedly connected to the input shaft, a moving shaft is rotationally connected to the operation box, a pusher dog is fixedly connected to the moving shaft, the pusher dog can rotationally abut against gear teeth of the gear, and a worm gear is fixedly connected to the bottom end of the moving shaft; a worm is rotationally connected into the operation box and is in meshed connection with the worm gear, and one end of the worm penetrates out of the operation box and is fixedly connected with an auxiliary operation board. The utility model relates to the technical field of clamps, and has the characteristics of large clamping force and stable clamping.

The conveyor rack welding platform comprises a workbench and stand column supports arranged on the periphery of the workbench, a connecting supporting plate is arranged at the upper ends of the stand column supports, the connecting supporting plate is connected with the workbench through fasteners, a groove is formed in the workbench, a material supporting piece is arranged in the groove in a sliding mode, and the material supporting piece is connected with the workbench through fasteners. A connecting lug plate is arranged on a side plate of the material supporting piece, the connecting lug plate is connected with a lead screw driving base arranged on the upper surface of the workbench, the material supporting piece is in linkage with the lead screw driving base through the connecting lug plate, and high-precision position adjustment can be achieved; the rotating directions of the two lead screws are opposite, so that synchronous and symmetrical movement of the material supporting pieces on the two sides is ensured, workpieces with different widths are quickly adapted, stress is uniform, jamming or deviation is avoided, the problems that a traditional fixed welding platform is inconvenient to adjust and large in positioning error are solved, the welding platform is suitable for batch welding of workpieces of multiple specifications, and production efficiency and welding consistency are greatly improved.