Steel platform stand column welding perpendicularity calibration tool

Abstract

The invention relates to the technical field of steel platform stand column welding, in particular to a steel platform stand column welding perpendicularity calibration tool which comprises a positioning mechanism, a thermal driving mechanism and a compensation mechanism. The positioning mechanism comprises a fixed assembly and a movable assembly; the fixing assembly is installed on the fixing base. The movable assembly is slidably installed on the sliding guide groove. The thermal driving mechanism is connected with the fixing assembly; the compensation mechanism is connected between the thermal driving mechanism and the movable assembly; the thermal driving mechanism can drive the compensation mechanism through heat change in the welding process to adjust the movable clamping plate to make inclined upward microspur motion, the movable clamping plate is matched with the fixed clamping plate, so that opposite force borne by the stand column is not in a unified straight line, compensation torque opposite to the deviation direction is generated on the stand column, deviation generated by the stand column is corrected, and welding quality is improved. The welding perpendicularity is ensured to reach the standard; the problem that due to the fact that local stress concentration is intensified through a traditional tool, perpendicularity is out of tolerance due to thermal deformation in the welding process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel platform column welding, and particularly relates to a welding perpendicularity calibration tool for steel platform columns. Background Art

[0002] The welding perpendicularity calibration tool for steel platform columns belongs to a kind of welding tooling. It mainly ensures that the column can reach the correct position by fixing, positioning, and adjusting the welding workpiece, so as to meet the engineering perpendicularity requirements. And the welding tooling can avoid potential safety hazards caused by component instability during construction through rigid fixation and dynamic balance.

[0003] Currently, when welding steel structure platform columns, a crane is usually used in combination with guy ropes for welding. The column is transported to the initial position by the crane, and then a guy rope adjustable tension grid is formed to adjust the perpendicularity of the column. When the perpendicularity is adjusted in place, welding will be carried out. However, changes in wind force and temperature will affect the tension of the guy ropes, resulting in changes in the position of the column, and further affecting the perpendicularity. Moreover, the adjustment of the guy ropes depends on manual operation. When using a wire tightener for fine adjustment, multiple measurements and adjustments are required, wasting time and energy and it is difficult to meet the high-precision requirements. The prior art has proposed good solutions to this problem. For example, a steel column perpendicularity adjustment device with the patent publication number CN112096097B slides a sliding bracket on a support, uses a jack to push the sliding bracket to rise, and applies a correction force to the steel column through a pull rod and an adjustment plate to achieve fine adjustment of the perpendicularity, which can improve the perpendicularity accuracy, avoid interference from environmental factors such as wind force, and can also significantly improve the construction efficiency by accelerating the adjustment speed.

[0004] Although the prior art has solved the problems that the traditional guy rope adjustment of perpendicularity is troublesome and the perpendicularity will decrease due to the influence of wind force, there are still the following problems: During the welding process, due to local heating and local cooling, thermal stress will be generated, resulting in shrinkage deformation at the welded part of the column. For example, when welding one side wall of a cuboid column, the temperature of the opposite side wall is lower than that of the side wall being welded. At this time, the expansion amount on the welded side will increase, causing it to bend towards the un-welded side and resulting in perpendicularity deviation. And the traditional guy ropes, jacks, or welding jigs can only adjust and fix the column before welding, unable to cope with the dynamic deformation during welding and will exacerbate the local stress concentration during welding, unable to preset the reverse deformation amount or offset the welding thermal stress in real time, resulting in out-of-tolerance perpendicularity after welding and unable to meet the perpendicularity requirements of steel structure platform columns.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs a welding perpendicularity calibration tool for steel platform columns. Summary of the Invention

[0006] The present invention provides a welding verticality calibration tool for a steel platform column, which solves the problem that traditional tools will exacerbate local stress concentration, resulting in out-of-tolerance verticality caused by thermal deformation during the welding process. By setting a thermal drive mechanism and a compensation mechanism, during welding, one side of the fixed clamping plate is welded first, and the fixed clamping plate can transfer the heat generated by welding to the thermal drive mechanism. The thermal drive mechanism can drive the compensation mechanism through the heat change during the welding process to adjust the movable clamping plate to perform a micro-movement inclined upward, and cooperate with the fixed clamping plate, so that the opposing forces received by the column are not in the same straight line, thereby generating a compensation moment opposite to the deviation direction on the column to correct the deviation generated by the column and ensure that the welding verticality meets the standard.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A welding verticality calibration tool for a steel platform column includes a fixed seat; it also includes a positioning mechanism, a thermal drive mechanism and a compensation mechanism; the positioning mechanism includes a fixed component and a movable component; the fixed component is installed on the fixed seat; a sliding guide groove is provided on the fixed seat; the movable component is slidably installed on the sliding guide groove; the thermal drive mechanism is connected to the fixed component, and when welding the side where the column contacts the fixed component, the fixed component transfers the welding heat to the thermal drive mechanism; the compensation mechanism is connected between the thermal drive mechanism and the movable component, and the thermal drive mechanism drives the movable component to perform an inclined upward movement toward the fixed component side through the compensation mechanism when heated.

[0009] Preferably, the fixed seat further includes a base, an adjusting bolt and a mounting plate; the base is placed on the ground; the adjusting bolt is installed on the base; the mounting plate is connected to the adjusting bolt;

[0010] In the above solution, the height of the fixed component and the movable component on the mounting plate can be changed through the adjusting bolt and the mounting plate. For columns of different heights, the stability of the column can be maintained by different clamping heights, so as to ensure that the verticality of the column after clamping meets the requirements.

[0011] Preferably, the fixed component includes a fixed pillar, a fixed bolt, a fixed clamping plate and a disc spring group; the fixed pillar is vertically arranged on the fixed seat; the fixed bolt is connected to the fixed pillar; the fixed clamping plate is movably connected to the fixed bolt; the disc spring group is sleeved on the fixed bolt and connected to the fixed clamping plate.

[0012] In the above solution, the fixed clamping plate can serve as a reference. After the column is fixed by cooperating with the movable component, a clamping force can be generated on the column to ensure that the column will not shift during the welding process. In the pre-tightened state, the disc spring group will not be compressed. When welding is carried out on the other side after the welding work on one side of the fixed clamping plate is completed, as the temperature on the side of the fixed clamping plate drops, the thermal driving mechanism and the compensation mechanism gradually reduce the clamping force on the side of the movable component. At this time, the disc spring group can release elastic force, and the distance that the disc spring group can push is relatively small. Therefore, it can cooperate with the already welded part to help stabilize the column and make fine adjustments until the column returns to its initial fixed state, thereby reducing the influence of thermal deformation on the perpendicularity and ensuring that the perpendicularity meets the requirements.

[0013] Preferably, the movable component includes a movable support, a movable clamping plate, a tension spring, and a pre-tightening bolt; the movable support is slidably installed on the sliding guide groove, a pre-tightening screw hole is provided in the upper part of the movable support, and a limiting screw hole is provided in the lower part; the movable clamping plate is connected to the movable support; the tension spring is connected between the movable clamping plate and the movable support; the pre-tightening bolt is rotatably installed in the pre-tightening screw hole.

[0014] In the above solution, the movable support can slide freely before welding, which is convenient for fixing and correcting the position. After placing the column between the movable clamping plate and the fixed clamping plate during use, move the movable support to a suitable position and then connect the movable support and the compensation mechanism through the limiting screw hole. Since the compensation mechanism can only move in one direction, it will limit the movable support at this time to ensure that the movable support will not move in the reverse direction during the welding process. After the limiting is completed, turning the pre-tightening bolt can freely adjust the pre-tightening force in the initial state to prevent the pre-tightening clamping force from being too large or too small, so that the compensation clamping force generated during the subsequent welding process can cooperate with the initial pre-tightening clamping force to correct the perpendicularity deviation of the column.

[0015] Preferably, both the fixed clamping plate and the movable clamping plate are of right-angled structures; both the fixing bolts and the fixed clamping plate are made of high thermal conductivity materials.

[0016] In the above solution, both being of right-angled structures can simultaneously fix two faces of the cuboid column during the welding process. When welding the fixed clamping plate side first, the movable clamping plate side can automatically adjust the clamping force according to the temperature change to ensure that when the fixed clamping plate side expands during welding and causes the column to bend towards the movable clamping plate side, the movable clamping plate can stably adjust the perpendicularity of the column. Moreover, the right-angled structure can restrict all four faces, ensuring that stable clamping force can be provided regardless of which face bends or shifts, thereby ensuring that the perpendicularity meets the requirements; the fixing bolts and the fixed clamping plate made of high thermal conductivity materials can ensure that heat is transferred to the thermal driving mechanism during the welding process to achieve automatic compensation according to the heat change.

[0017] Preferably, the thermal driving mechanism includes a thermal driving cavity, a transmission cavity, a rack chute, a driving sliding plug, a return spring, a driving gear, a driving rack and a thermal offset pushing block; the thermal driving cavity is opened in the fixed support column, and the thermal driving cavity is filled with a thermal expansion material; the transmission cavity is opened on the left side of the thermal driving cavity; the rack chute is opened on the lower side of the transmission cavity; the driving sliding plug is slidably installed in the thermal driving cavity; the return spring is connected to the driving sliding plug; the driving gear is rotatably installed in the transmission cavity; the driving rack is engaged with the driving gear; the thermal offset pushing block is connected between the driving gear and the driving sliding plug.

[0018] In the above solution, the expansion displacement generated by the thermal expansion material in the thermal expansion cavity can be linearly amplified or linearly reduced by the driving gear and the driving rack. By using the heat change, while realizing the driving compensation mechanism to generate a compensation force, the magnitude of the compensation force can be adjusted. Before batch welding, by measuring the magnitude of the compensation force required by a certain specific material at different temperatures or the offset amount to be compensated, the transmission ratio of the driving gear and the driving rack is adjusted to achieve the purpose of precise compensation, further improving the compensation effect and ensuring the lowest perpendicularity error after welding.

[0019] Preferably, the sliding guide groove is of an inclined structure, and the inclination opening faces the side of the fixed clamping plate.

[0020] In the above solution, since the sliding guide groove can enable the movable clamping plate to move obliquely, the lateral driving force of the compensation mechanism is converted into an oblique compensation force of the movable clamping plate against the column, and the direction of the oblique thrust is opposite to the deformation direction of the column under thermal deformation, thereby achieving the compensation effect. At this time, the height of the movable clamping plate is higher than that of the fixed clamping plate, so that the forces received by the column are not on the same straight line, forming a moment opposite to the offset direction to help correct the offset, and further avoiding the problem of perpendicularity out-of-tolerance caused by welding thermal deformation.

[0021] Preferably, the compensation mechanism includes a transverse movement groove, a compensation groove, a transverse movement pushing block, a return pushing block, a return spring and a limit bolt; the transverse movement groove is opened inside the mounting plate and is located below the rack chute; the compensation groove is opened inside the mounting plate and is communicated with the transverse movement groove; the transverse movement pushing block is slidably installed in the transverse movement groove; the return pushing block is slidably installed in the compensation groove, the tail of the return pushing block is of a telescopic structure and is provided with a fixed screw hole; the return spring is connected between the compensation groove and the return pushing block; the limit bolt is installed in the fixed screw hole and the limit screw hole simultaneously during welding.

[0022] In the above solution, the transverse pushing block is driven to move horizontally by the extrusion of the driving rack, and then the backward pushing block is pulled towards the fixed clamping plate through the horizontal movement of the transverse pushing block. At this time, the backward pushing block will drive the movable support to slide through the connection between the limit bolt and the movable support, so that the movable support can drive the movable clamping plate to increase the clamping force on the column.

[0023] Preferably, a downward pressing inclined surface is provided at the lower end of the driving rack; a pressure-receiving inclined surface is provided at one end of the transverse pushing block in contact with the driving rack, and a driving inclined surface is provided at the other end; a backward pushing groove is formed on the backward pushing block; a backward pushing inclined surface is provided on the backward pushing groove; the downward pressing inclined surface, the pressure-receiving inclined surface, the driving inclined surface, and the backward pushing inclined surface are all 45 degrees.

[0024] In the above solution, the angles of the four inclined surfaces are all 45 degrees. On the one hand, it is convenient for processing, and on the other hand, it can ensure that the displacement generated by the driving rack will not change during the transmission process, so that the displacement generated by the driving rack is equal to the displacement of the movable clamping plate, which is convenient for calculating the displacement, making the compensated displacement accurate and error-free, and ensuring that the welding perpendicularity meets the requirements.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. Compared with the existing column welding tooling, the present invention corrects the perpendicularity deviation caused by thermal deformation by setting a thermal driving mechanism and a compensation mechanism. During welding, the wall surface on the side where the column contacts the fixed clamping plate is welded first. The fixed clamping plate will serve as a fixed reference and transfer the heat generated by welding to the thermal driving mechanism. The thermal driving mechanism drives the compensation mechanism to change the displacement of the movable clamping plate according to the change of heat, so as to correct the perpendicularity deviation caused by thermal deformation. And an inclined sliding guide groove is provided. Through the sliding guide groove, the movable clamping plate can perform an inclined movement, so as to convert the horizontal driving force of the compensation mechanism into an inclined compensation force of the movable clamping plate on the column. At this time, the height of the movable clamping plate is higher than the height of the fixed clamping plate, so that the forces received by the column are not on the same straight line, forming a moment opposite to the offset direction to help correct the offset, thereby avoiding the perpendicularity out-of-tolerance caused by welding thermal deformation.

[0027] 2. Before welding, the movable support of the present invention can slide freely, facilitating fixation and position correction. After placing the column between the movable clamping plate and the fixed clamping plate during use, move the movable support to a suitable position and then connect the movable support and the compensation mechanism through the limit screw holes. Since the compensation mechanism can only move in one direction, it will limit the movable support at this time, ensuring that the movable support will not move in the reverse direction during the welding process. After the limit is completed, turning the pre-tightening bolt can freely adjust the pre-tightening force in the initial state; and by adjusting the bolt and the mounting plate, the heights of the fixed components and the movable components on the mounting plate can be changed, and for columns of different heights, the stability of the column can be maintained by different clamping heights; making the overall clamping more flexible, being able to perform more precise verticality adjustment for columns of different sizes and specifications, thereby ensuring that the welding verticality of the column meets the requirements.

[0028] 3. The present invention drives the driving gear to rotate by driving the sliding plug to slide under the change of heat, and drives the driving rack to transmit through the rotation of the driving gear. Through the driving gear and the driving rack, the expansion displacement generated by the thermal expansion substance in the thermal expansion cavity can be linearly amplified or linearly reduced. Before batch welding, by measuring the magnitude of the compensation force required or the offset amount to be compensated for a certain specific material at different temperatures, the transmission ratio of the driving gear and the driving rack is adjusted to achieve the purpose of precise compensation, further improving the compensation effect and ensuring the lowest verticality error after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 is the overall structure diagram of the present invention;

[0031] Figure 2 is the schematic diagram of the internal structure of the fixed column of the present invention;

[0032] Figure 3 is Figure 2 the enlarged view of the structure at A in

[0033] Figure 4 is the cross-sectional view of the present invention;

[0034] Figure 5 is Figure 2 the enlarged view of the structure at B in

[0035] Figure 6 Perspective view of the compensation mechanism of the present invention;

[0036] Figure 7 is Figure 6 Enlarged view of the structure at position C in

[0037] Figure 8 Internal structure sectional view of the mounting plate of the present invention;

[0038] In the figure: 1, fixed seat; 11, sliding guide groove; 12, base; 13, adjusting bolt; 14, mounting plate; 2, positioning mechanism; 21, fixing component; 211, fixing pillar; 212, fixing bolt; 213, fixing clamping plate; 214, disc spring group; 22, moving component; 221, moving support; 2211, pre-tightening screw hole; 2212, limiting screw hole; 222, moving clamping plate; 223, tension spring; 224, pre-tightening bolt; 3, thermal driving mechanism; 31, thermal driving cavity; 32, transmission cavity; 33, rack chute; 34, driving sliding plug; 35, return spring; 36, driving gear; 37, driving rack; 371, downward pressing inclined surface; 38, thermal offset push block; 4, compensation mechanism; 41, transverse movement groove; 42, compensation groove; 43, transverse movement push block; 431, pressed inclined surface; 432, driving inclined surface; 44, pushing-back block; 441, fixing screw hole; 442, pushing-back groove; 4421, pushing-back inclined surface; 45, pulling-back spring; 46, limiting bolt. Detailed implementation manners

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0040] Please refer to Figures 1 to 8 , the present invention provides a verticality calibration tool for welding steel platform columns, and the technical solution is as follows:

[0041] As a specific implementation manner of the present invention, referring to Figure 1 and Figure 2 , a verticality calibration tool for welding steel platform columns includes a fixed seat 1; it further includes a positioning mechanism 2, a thermal driving mechanism 3 and a compensation mechanism 4; the positioning mechanism 2 includes a fixing component 21 and a moving component 22; the fixing component 21 is installed on the fixed seat 1; a sliding guide groove 11 is opened on the fixed seat 1; the moving component 22 is slidably installed on the sliding guide groove 11; the thermal driving mechanism 3 is connected to the fixing component 21, and when welding on the side where the column contacts the fixing component 21, the fixing component 21 transfers the welding heat to the thermal driving mechanism 3; the compensation mechanism 4 is connected between the thermal driving mechanism 3 and the moving component 22, and when the thermal driving mechanism 3 is heated, it drives the moving component 22 to perform an inclined upward movement toward the fixing component 21 through the compensation mechanism 4.

[0042] As a specific embodiment of the present invention, referring to Figure 2 , the fixing base 1 further includes a base 12, an adjusting bolt 13, and a mounting plate 14; the base 12 is placed on the ground during use; the adjusting bolt 13 is installed on the base 12; the mounting plate 14 is connected to the adjusting bolt 13; by means of the adjusting bolt 13 and the mounting plate 14, the height of the fixing component 21 and the movable component 22 on the mounting plate 14 can be changed, and for columns of different heights, the stability of the column can be maintained by different clamping heights, so as to ensure that the perpendicularity of the column after clamping meets the requirements.

[0043] As a specific embodiment of the present invention, referring to Figure 1 , Figure 2 and Figure 4 , the fixing component 21 includes a fixing pillar 211, a fixing bolt 212, a fixing clamping plate 213, and a disc spring group 214; the fixing pillar 211 is vertically arranged on the mounting plate 14; the fixing bolt 212 is connected to the fixing pillar 211; the fixing clamping plate 213 is movably connected to the fixing bolt 212; the disc spring group 214 is sleeved on the fixing bolt 212 and is connected to the fixing clamping plate 213. The fixing clamping plate 213 can be used as a reference. After the column is fixed in cooperation with the movable component 22, a clamping force can be generated on the column to ensure that the column does not shift during the welding process. In the pre-tightening state, the disc spring group 214 will not be compressed. When the welding work on one side of the fixing clamping plate 213 is completed and the welding on the other side is carried out, as the temperature on one side of the fixing clamping plate 213 drops, the thermal driving mechanism 3 and the compensation mechanism 4 gradually reduce the clamping force on the side of the movable component 22. At this time, the disc spring group 214 can release elastic force, and the distance that the disc spring group 214 can push is relatively small, so it can cooperate with the already welded part to help stabilize the column and perform fine adjustment, adjusting to the initial fixed state of the column, thereby reducing the influence of thermal deformation on the perpendicularity and ensuring that the perpendicularity meets the requirements.

[0044] As a specific embodiment of the present invention, referring to Figure 1 , Figure 2 , Figure 4 and Figure 6, the movable component 22 includes a movable support 221, a movable clamping plate 222, a tension spring 223, and a pre-tightening bolt 224; the movable support 221 is slidably mounted on the sliding guide groove 11, a pre-tightening screw hole 2211 is formed in the upper part of the movable support 221, and a limiting screw hole 2212 is formed in the lower part; the movable clamping plate 222 is connected to the movable support 221; the tension spring 223 is connected between the movable clamping plate 222 and the movable support 221; the pre-tightening bolt 224 is rotatably mounted in the pre-tightening screw hole 2211. The movable support 221 can slide freely before welding, which is convenient for fixing and correcting the position. After placing the column between the movable clamping plate 222 and the fixed clamping plate 213 during use, move the movable support 221 to a suitable position and then connect the movable support 221 and the compensation mechanism 4 through the limiting screw hole 2212. Since the compensation mechanism 4 can only move in one direction, at this time, the movable support 221 will be limited, ensuring that the movable support 221 will not move in the reverse direction during the welding process. After the limiting is completed, turning the pre-tightening bolt 224 can freely adjust the pre-tightening force in the initial state, preventing the pre-tightening clamping force from being too large or too small, so that the compensation clamping force generated during the subsequent welding process can cooperate with the initial pre-tightening clamping force to correct the verticality deviation of the column.

[0045] As a specific embodiment of the present invention, referring to Figure 2 and Figure 6 , both the fixed clamping plate 213 and the movable clamping plate 222 are right-angled structures; both the fixing bolt 212 and the fixed clamping plate 213 are made of high thermal conductivity materials. In the above solution, both being right-angled structures can simultaneously fix two surfaces of the cuboid column during the welding process. When welding one side of the fixed clamping plate 213 first, the movable clamping plate 222 can automatically adjust the clamping force with the change of temperature on one side, so as to ensure that when the column bends towards the movable clamping plate 222 due to expansion during the welding of one side of the fixed clamping plate 213, the movable clamping plate 222 can stably adjust the verticality of the column. Moreover, the right-angled structure can limit all four surfaces, ensuring that stable clamping force can be provided no matter which surface bends and deviates, thus ensuring that the verticality meets the requirements; the fixing bolt 212 and the fixed clamping plate 213 being made of high thermal conductivity materials can ensure that heat is transferred to the thermal drive mechanism 3 during the welding process, realizing automatic compensation with the change of heat.

[0046] As a specific embodiment of the present invention, referring to Figure 2 , Figure 4 and Figure 6, the sliding guide groove 11 is of an inclined structure, and the inclination opening faces the side of the fixed clamping plate 213. Since the sliding guide groove 11 can enable the movable clamping plate 222 to perform an oblique movement, thereby converting the lateral driving force of the compensation mechanism 4 into an oblique compensation force of the movable clamping plate 222 against the column, and the direction of the oblique thrust is opposite to the deformation direction of the column under thermal deformation, thus achieving the compensation effect. At this time, the height of the movable clamping plate 222 is higher than that of the fixed clamping plate 213, so that the forces received by the column are not on the same straight line, forming a moment opposite to the offset direction to help correct the offset generated by the column under thermal deformation, thereby avoiding the perpendicularity out-of-tolerance caused by welding thermal deformation.

[0047] As a specific embodiment of the present invention, referring to Figure 3 , Figure 4 and Figure 6 , the thermal driving mechanism 3 includes a thermal driving cavity 31, a transmission cavity 32, a rack chute 33, a driving slide plug 34, a return spring 35, a driving gear 36, a driving rack 37 and a thermal offset push block 38; the thermal driving cavity 31 is opened in the fixed support column 211, and the thermal driving cavity 31 is filled with a thermal expansion substance; the transmission cavity 32 is opened on the left side of the thermal driving cavity 31; the rack chute 33 is opened on the lower side of the transmission cavity 32; the driving slide plug 34 is slidably installed in the thermal driving cavity 31; the return spring 35 is connected to the driving slide plug 34; the driving gear 36 is rotatably installed in the transmission cavity 32; the driving rack 37 is engaged with the driving gear 36; the thermal offset push block 38 is connected between the driving gear 36 and the driving slide plug 34, and the thermal offset push block 38 is slidably connected to the driving slide plug 34. A notch for the thermal offset push block 38 to slide in the vertical direction is opened on the driving slide plug 34. When the thermal expansion substance absorbs heat and expands, the driving slide plug 34 moves towards the driving gear 36. At this time, the driving gear 36 will be pushed to rotate by the thermal offset push block 38. The rotation of the driving gear 36 drives the driving rack 37 to move vertically downward, and the downward pressure of the driving rack 37 drives the compensation mechanism 4 to increase the compensation force. When the temperature decreases, the driving slide plug 34 can be pulled back again under the elastic force of the return spring 35. At this time, the compensation force will be reduced, so as to adjust the size of the compensation force according to the temperature change, and then correct the perpendicularity of the column. Through the driving gear 36 and the driving rack 37, the expansion displacement generated by the thermal expansion substance in the thermal expansion cavity can be linearly amplified or linearly reduced. By using the heat change to drive the compensation mechanism 4 to generate a compensation force and at the same time adjust the size of the compensation force, before batch welding, by measuring the size of the compensation force required by a certain specific material at different temperatures or the offset amount to be compensated, the transmission ratio of the driving gear 36 and the driving rack 37 is adjusted to achieve the purpose of precise compensation, further improving the compensation effect and ensuring the lowest perpendicularity error after welding.

[0048] As a specific embodiment of the present invention, referring to Figure 6 , Figure 7 and Figure 8 , the compensation mechanism 4 includes a transverse movement groove 41, a compensation groove 42, a transverse movement push block 43, a return push block 44, a return spring 45 and a limit bolt 46; the transverse movement groove 41 is opened inside the mounting plate 14 and is located below the rack chute 33; the compensation groove 42 is opened inside the mounting plate 14 and is communicated with the transverse movement groove 41; the transverse movement push block 43 is slidably installed in the transverse movement groove 41; the return push block 44 is slidably installed in the compensation groove 42, the tail of the return push block 44 is a telescopic structure and is provided with a fixing screw hole 441. Since the movable support 221 performs an oblique movement on the sliding guide groove 11, the return push block 44 is provided as a telescopic structure to enable the compensation process to proceed smoothly; the return spring 45 is connected between the compensation groove 42 and the return push block 44; the limit bolt 46 is installed in the fixing screw hole 441 and the limit screw hole 2212 during welding. The transverse movement push block 43 is driven to move transversely by the extrusion of the driving rack 37, and then the transverse movement of the transverse movement push block 43 pulls the return push block 44 towards the fixed clamping plate 213. At this time, the return push block 44 will drive the movable support 221 to slide through the connection between the limit bolt 46 and the movable support 221, so that the movable support 221 can drive the movable clamping plate 222 to increase the clamping force on the column. The lower end of the driving rack 37 is provided with a downward pressing inclined surface 371; one end of the transverse movement push block 43 in contact with the driving rack 37 is provided with a pressure-receiving inclined surface 431, and the other end is provided with a driving inclined surface 432; a return push groove 442 is opened on the return push block 44, and the width of the return push groove 442 is greater than the width of the transverse movement push block 43 to ensure that the transverse movement push block 43 can be pressed into the return push groove 442 and press the return push block 44 towards the return spring 45; a return push inclined surface 4421 is provided on the return push groove 442; the downward pressing inclined surface 371, the pressure-receiving inclined surface 431, the driving inclined surface 432 and the return push inclined surface 4421 are all 45 degrees. When the driving rack 37 is pressed downwards, the downward pressing inclined surface 371 will squeeze the pressure-receiving inclined surface 431 of the transverse movement push block 43, so that the transverse movement push block 43 moves towards the return push block 44. At this time, the driving inclined surface 432 of the transverse movement push block 43 will squeeze the return push inclined surface 4421 of the return push block 44. At this time, the return push block 44 compresses the return spring 45 and drives the movable support 221 to move through the limit bolt 46. The four inclined surface angles are all 45 degrees. On the one hand, it is convenient for processing, and on the other hand, it can ensure that the displacement generated by the driving rack 37 will not change during the transmission process, so that the displacement generated by the driving rack 37 is equal to the displacement of the movable clamping plate 222, which is convenient for calculating the displacement amount, making the compensation displacement amount accurate and error-free, and ensuring that the welding perpendicularity meets the requirements.

[0049] Workflow: After adjusting the mounting plate 14 to an appropriate height, place the column to be welded between the fixed clamping plate 213 and the movable clamping plate 222, adjust the position of the movable clamping plate 222 and complete pre-tightening; after the initial fixation, start welding from one side of the fixed clamping plate 213. The heat generated during the welding process will be transferred to the thermal drive mechanism 3, and the thermal drive mechanism 3 drives the compensation mechanism 4 through the change in heat to drive the movable clamping plate 222 to apply a compensation force, dynamically calibrating the perpendicularity of the column, thereby preventing the phenomenon of out-of-tolerance perpendicularity caused by welding thermal deformation.

[0050] Specifically, during the initial fixation process, according to columns of different heights, adjust the distance between the mounting plate 14 and the base 12 by adjusting the bolts 13, change the heights of the fixed component 21 and the movable component 22 on the mounting plate 14. For columns of different heights, the stability of the column can be maintained by different clamping heights, so as to ensure that the perpendicularity of the column after clamping meets the requirements; after the height adjustment is completed, first make the side wall of the column fit with the fixed clamping plate 213, and then slide the movable clamping plate 222 to adjust the column to a vertical state. At this time, screw the limit bolts 46 into the fixed screw holes 441 and the limit screw holes 2212 at the same time. At this time, the movable clamping plate 222 will be limited and cannot move horizontally away from the column. After the limitation is completed, tighten the pre-tightening bolts 224 to adjust the pre-tightening force in the initial fixed state. At this time, the initial fixation is completed.

[0051] Welding starts after the initial fixation is completed. During the welding process, the column wall surface on the side that fits the fixed clamping plate 213 is welded first. The heat generated by the welding will be transferred to the thermal expansion material in the thermal drive cavity 31 through the fixed clamping plate 213. After the thermal expansion material absorbs heat and expands, the drive plug 34 moves towards the drive gear 36. At this time, the drive gear 36 will be pushed to rotate by the thermal offset push block 38. The rotation of the drive gear 36 drives the drive rack 37 to move vertically downward. The adjustment of the compensation displacement amount is achieved through the transmission ratio between the drive gear 36 and the drive rack 37. When the drive rack 37 is pressed down, the downward pressing slope 371 will squeeze the pressed slope 431 of the transverse movement push block 43, causing the transverse movement push block 43 to move towards the return push block 44. At this time, the drive slope 432 of the transverse movement push block 43 will squeeze the return push slope 4421 of the return push block 44. At this time, the return push block 44 compresses the return spring 45 and drives the movable support 221 through the limit bolt 46. Under the restriction of the sliding guide groove 11, the movable support 221 will drive the movable clamping plate 222 to move obliquely along the path of the sliding guide groove 11, thereby converting the transverse driving force of the return push block 44 into an oblique compensation force of the movable clamping plate 222 on the column. Since the movable clamping plate 222 performs an inclined upward compensation displacement, the height of the movable clamping plate 222 is higher than that of the fixed clamping plate 213 at this time, so that the forces received by the column are not on the same straight line, forming a moment opposite to the offset direction to help correct the offset generated by the column under thermal deformation (the thermal deformation offset can be approximately regarded as a clockwise deflection, and the compensation moment is a counterclockwise moment), thereby avoiding the out-of-tolerance of the perpendicularity caused by the welding thermal deformation.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A welding verticality calibration tool for the steel platform column, comprising a fixed seat (1); characterized in that: It also includes a positioning mechanism (2), a thermal drive mechanism (3) and a compensation mechanism (4); the positioning mechanism (2) includes a fixed component (21) and a movable component (22); the fixed component (21) is installed on the fixed seat (1); a sliding guide groove (11) is provided on the fixed seat (1); the movable component (22) is slidably installed on the sliding guide groove (11); the thermal drive mechanism (3) is connected to the fixed component (21), and when welding is performed on the side where the column contacts the fixed component (21), the fixed component (21) transfers the welding heat to the thermal drive mechanism (3); the compensation mechanism (4) is connected between the thermal drive mechanism (3) and the movable component (22), and when the thermal drive mechanism (3) is heated, it drives the movable component (22) to move obliquely upward toward the fixed component (21) through the compensation mechanism (4).

2. The verticality calibration tool for welding of the steel platform column according to claim 1, characterized in that: The fixed seat (1) further includes a base (12), an adjusting bolt (13) and a mounting plate (14); the base (12) is placed on the ground during use; the adjusting bolt (13) is installed on the base (12); the mounting plate (14) is connected to the adjusting bolt (13).

3. A welding perpendicularity calibration tool for the steel platform column according to claim 2, characterized in that: The fixed component (21) includes a fixed pillar (211), a fixed bolt (212), a fixed clamping plate (213) and a disc spring group (214); the fixed pillar (211) is vertically arranged on the mounting plate (14); the fixed bolt (212) is connected to the fixed pillar (211); the fixed clamping plate (213) is movably connected to the fixed bolt (212); the disc spring group (214) is sleeved on the fixed bolt (212) and connected to the fixed clamping plate (213).

4. A welding verticality calibration tooling for the steel platform column according to claim 3, characterized in that: The movable component (22) includes a movable support (221), a movable clamping plate (222), a tension spring (223) and a pre-tightening bolt (224); the movable support (221) is slidably installed on the sliding guide groove (11), a pre-tightening screw hole (2211) is provided in the upper part of the movable support (221), and a limiting screw hole (2212) is provided in the lower part; the movable clamping plate (222) is connected to the movable support (221); the tension spring (223) is connected between the movable clamping plate (222) and the movable support (221); the pre-tightening bolt (224) is rotatably installed in the pre-tightening screw hole (2211).

5. The welding verticality calibration tooling for the steel platform column according to claim 4, characterized in that: Both the fixed clamping plate (213) and the movable clamping plate (222) are of right-angled structures; both the fixed bolt (212) and the fixed clamping plate (213) are made of high heat-conducting materials.

6. A verticality calibration tool for welding steel platform columns according to claim 3, characterized in that: The sliding guide groove (11) is of an inclined structure, and the inclination opening faces the side of the fixed clamping plate (213).

7. A welding verticality calibration tooling for the steel platform column according to claim 4, characterized in that: The thermal drive mechanism (3) includes a thermal drive chamber (31), a transmission chamber (32), a rack chute (33), a drive slider (34), a return spring (35), a drive gear (36), a drive rack (37), and a thermal offset push block (38); the thermal drive chamber (31) is formed in the fixed support column (211), and the thermal drive chamber (31) is filled with a thermally expandable substance; the transmission chamber (32) is formed on the left side of the thermal drive chamber (31); the rack chute (33) is formed on the lower side of the transmission chamber (32); the drive slider (34) is slidably installed in the thermal drive chamber (31); the return spring (35) is connected to the drive slider (34); the drive gear (36) is rotatably installed in the transmission chamber (32); the drive rack (37) meshes with the drive gear (36); the thermal offset push block (38) is connected between the drive gear (36) and the drive slider (34), and the thermal offset push block (38) is slidably connected to the drive slider (34).

8. A welding verticality calibration tooling for a steel platform column according to claim 7, characterized in that: The compensation mechanism (4) includes a transverse movement groove (41), a compensation groove (42), a transverse movement push block (43), a return push block (44), a return spring (45), and a limit bolt (46); the transverse movement groove (41) is formed inside the mounting plate (14) and is located below the rack chute (33); the compensation groove (42) is formed inside the mounting plate (14) and communicates with the transverse movement groove (41); the transverse movement push block (43) is slidably installed in the transverse movement groove (41); the return push block (44) is slidably installed in the compensation groove (42), the tail of the return push block (44) is a telescopic structure and is provided with a fixing screw hole (441); the return spring (45) is connected between the compensation groove (42) and the return push block (44); the limit bolt (46) is installed in the fixing screw hole (441) and the limit screw hole (2212) during welding at the same time.

9. A welding verticality calibration tooling for a steel platform column according to claim 8, characterized in that: The lower end of the drive rack (37) is provided with a downward pressure inclined surface (371); one end of the transverse movement push block (43) in contact with the drive rack (37) is provided with a pressure-receiving inclined surface (431), and the other end is provided with a drive inclined surface (432); a return push groove (442) is formed on the return push block (44); a return push inclined surface (4421) is provided on the return push groove (442); the downward pressure inclined surface (371), the pressure-receiving inclined surface (431), the drive inclined surface (432), and the return push inclined surface (4421) are all 45 degrees.

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