A welding shaping tool for office table frame

Abstract

The application discloses a kind of office table rack's welding setting tool, belong to table rack processing tool technical field;This tool includes the tool one and tool two by pin shaft two hinged cooperation, two groups of tool main body can be rotated ninety degrees relative switching parallel and vertical state, adapt to the multi-dimensional welding setting demand of table rack;Each group of tool main body is equipped with integrated base, positioning clamping assembly and reversible processing mould.Positioning clamping assembly integrates gravity self-locking linkage structure, can realize automatic clamping by the weight of steel pipe, cooperate motor-driven slip adjustment structure, can accurately adjust pipe welding position, while multiple telescopic connecting rods and elastic structure realize pipe flexible clamping, effectively avoid workpiece extrusion deformation and welding deviation;The application compact structure, strong universality, adapt to straight seam, right angle, tee, T type and other various office table rack pipe welding working condition, reduce artificial calibration cost, improve table rack welding precision and production efficiency, have good industrial application value.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a welding fixture for an office desk frame. Background Technology

[0002] As a core piece of furniture in daily office settings, metal desk frames are widely used in modern office furniture manufacturing due to their advantages such as high structural strength, good load-bearing capacity, resistance to deformation, and long service life. Metal desk frames are typically formed by splicing and welding multiple steel pipe profiles of different specifications and angles. The welding precision and shaping stability of the frame directly determine the overall flatness, assembly accuracy, and safety of the desk. Therefore, the positioning, clamping, and shaping effects of the welding fixtures are core processes for ensuring the quality of desk frame production.

[0003] Currently, the welding of metal desk frames in China mostly employs traditional, simple welding fixtures or manual-assisted positioning welding methods. Existing fixtures have numerous substantial defects in actual production applications, severely restricting the welding quality and production efficiency of desk frames. Firstly, traditional fixtures have fixed structures and limited functions, mostly only providing a single fixed positioning function, unable to achieve flexible angle switching and adjustment. This makes them difficult to adapt to the marking, cutting, and welding requirements of steel pipe profiles with different angles and specifications in desk frame production. The desk frame welding process requires processing and connecting pipes at various angles such as 30°, 45°, and 60°. Existing fixtures cannot handle multi-angle adaptation processing, requiring the replacement of multiple sets of different fixtures or manual adjustment of the pipe angles. This is not only cumbersome and time-consuming, but also prone to manual positioning errors, resulting in poor pipe connection accuracy. Consequently, the welded desk frame is prone to problems such as skewing, misalignment, and dimensional deviations.

[0004] Secondly, the existing welding fixtures have rudimentary clamping structures with extremely poor clamping stability and adaptability. Most traditional fixtures use fixed rigid clamping or simple bolt clamping structures, making it difficult to accurately control the clamping force. During clamping, pipe loosening and slippage are prone to occur. The thermal stress generated by the high temperature of welding will further aggravate pipe displacement, causing quality problems such as welding deformation, uneven welds, and excessive gaps in the butt joints, significantly increasing the product rework rate and scrap rate. At the same time, traditional clamping structures cannot adaptively adjust the clamping state according to pipe specifications, resulting in poor clamping adaptability. They can only be used for the production of single-size pipes, with extremely low versatility, and cannot meet the production and processing needs of batch and multi-specification table frames.

[0005] Furthermore, existing conventional tooling is mostly a one-piece fixed structure, which cannot achieve angle flipping and switching of the tooling body. The overall shape of the tooling is fixed, and it can only complete the positioning and welding operation in a single state. It cannot achieve flexible conversion and shaping between parallel and vertical states, making it difficult to adapt to the process requirements of multi-dimensional splicing and welding of table frames. In the process of welding the three-dimensional frame of the table frame, the workpiece placement posture needs to be adjusted multiple times. Traditional tooling cannot cooperate with the workpiece to complete multi-angle shaping, and can only rely on manual repeated movement and calibration of the workpiece. This not only greatly increases the labor intensity of operators, but also leads to chaotic production rhythm and low production efficiency, making it unsuitable for modern assembly line mass production operations.

[0006] In addition, most existing welding fixtures only have a single welding positioning function. Pre-treatment processes such as angle scribing and dimensional cutting of pipes before welding need to be completed separately using independent equipment. The separation of pipe pre-treatment and welding shaping processes results in poor process continuity, increases the workload of material transfer and secondary positioning, and further accumulates dimensional errors through multiple positioning and calibration, ultimately leading to inconsistent precision of the finished table frame. At the same time, traditional fixtures lack an adaptive buffer clamping structure, and rigid clamping can easily cause extrusion damage to the surface of the steel pipe profile, damaging the integrity of the workpiece's appearance and increasing the processing costs of subsequent grinding and repair, which is not conducive to enterprises reducing costs and increasing production efficiency.

[0007] Therefore, we propose a welding fixture for office desk frames. Summary of the Invention

[0008] One of the technical problems that this application aims to solve is that existing equipment generally suffers from low positioning accuracy, poor adaptability, cumbersome processes, low production efficiency, and insufficient stability of finished product quality, making it difficult to meet the production and processing needs of high-quality, mass-produced office desk frames.

[0009] To solve the above-mentioned technical problems, embodiments of this application provide two sets of tooling bodies that can be flipped and fitted relative to each other, and a second hinge pin for hinged connection of the two sets of tooling bodies. Both sets of tooling bodies can rotate relative to each other via hinge pins, enabling switching between parallel and vertical placement states; Each tooling unit includes a base, a positioning and clamping assembly for adaptive positioning and clamping of the steel pipes of the table frame, and a processing mold for pre-processing the pipes. The base consists of an integrated bottom plate and a vertical plate, with positioning and clamping components symmetrically assembled in the assembly slots of the bottom plate and the vertical plate.

[0010] In some embodiments, the vertical plate is an L-shaped structure with varying heights, and the top surface of the bottom plate and the side surface of the vertical plate are symmetrically provided with assembly slots for assembling positioning and clamping components. The mounting groove of the base plate is provided with a sliding guide structure, and the end of the vertical plate is provided with a mounting groove. A telescopic connecting rod is installed in the mounting groove. A spring is sleeved on the connecting rod. A clamping plate for auxiliary clamping and positioning is fixedly connected to the end of the connecting rod. The spring is normally in a compressed and energy-storing state.

[0011] In some embodiments, the positioning and clamping assembly includes a driving mechanism, a transmission connection mechanism, a clamping execution mechanism, and a sliding guide mechanism; The drive mechanism includes a motor fixed inside the mounting slot of the base plate and a push rod that is driven to extend and retract by the motor; The push rod end is connected to a connecting plate 1, which is fixedly connected to the connecting box through multiple sets of connecting rods 2. The connecting rods 2 are equipped with a buffer rebound structure.

[0012] In some embodiments, the other end of the connecting box is connected to a connecting plate 2 via multiple sets of connecting rods 4, and a spring 4 is sleeved on the connecting rods 4. Connecting plate one and connecting rod two are arranged symmetrically with respect to the length centerline of the connecting box, forming a symmetrical transmission buffer structure.

[0013] In some embodiments, clamping execution structures are symmetrically assembled on the front and rear sides of the connecting box. The clamping execution structures include a connecting rod three, a spring three, and a clamping plate two. One end of the connecting rod three is fixedly connected to the clamping plate two, and the other end of the connecting rod three is fixedly connected to the side wall of the connecting box. The spring three is sleeved on the outside of the connecting rod three. The connecting rod three can cooperate with the spring three to extend and retract, thereby driving the clamping plate two to complete the clamping and releasing action.

[0014] In some embodiments, the top of the connecting box is covered with a cover, and a vertically sliding connecting block passes through the center of the cover; A connecting plate four is fixed to the bottom of the connecting block. The connecting plate four is hinged to the connecting plate three via the connecting rod five. The connecting plate three is fixedly connected to the connecting rod three. The connecting block is connected to the bottom wall of the connecting box via the spring five. A guide block is provided at the bottom of the connecting box, and the guide block slides in conjunction with the sliding guide structure of the base plate.

[0015] In some embodiments, the processing mold is hinged to the top of the vertical plate via a pin, and the processing mold can rotate around the pin to change its posture. The processing mold plate has groove structures of various specifications. The processing mold can be rotated to be parallel or perpendicular to the vertical plate to adapt to the scribing and cutting pre-processing operations of steel pipes.

[0016] In some embodiments, the positioning and clamping assembly adopts a gravity-linked self-locking clamping structure; When the steel pipe is placed above the connecting block, it can press down on the connecting block by its own weight, which will drive the connecting plate four to move down and compress the spring five. The connecting rod five and the connecting plate three will then move together to achieve automatic clamping of the steel pipe. After the steel pipe is lifted, the spring five will rebound and reset, which will reset the transmission structure and release the steel pipe from the clamping state.

[0017] In some embodiments, the motor can drive the push rod to extend and retract, thereby causing the connecting plate and the connecting box to slide linearly along the sliding guide structure of the base plate through the guide block. This can drive the steel pipe material after clamping and fixing to move precisely, complete the adjustment and positioning of the pipe welding position, and adapt to the butt welding operations of various types of pipe materials.

[0018] In some embodiments, connecting rod one, connecting rod two, connecting rod three, and connecting rod four are all configured as telescopic structures to adapt to the clamping and processing needs of table frame steel pipes of different specifications.

[0019] This invention has at least the following beneficial effects: This fixture employs a combined structure where fixture one and fixture two are hinged together via pin two. It can rotate 90 degrees clockwise or counterclockwise according to the welding process requirements of the desk frame, flexibly switching between parallel and perpendicular positions. This effectively adapts to the splicing and welding needs of multi-dimensional three-dimensional office desk frames. Traditional fixtures are fixed, one-piece structures that cannot switch positions, requiring repeated manual adjustments to workpiece positions and calibration of docking angles, resulting in cumbersome procedures and significant positioning errors. This structure, through the posture adjustment of the fixture itself, allows for multi-angle and multi-directional welding and shaping operations without frequent workpiece movement, significantly reducing manual calibration procedures and completely solving the problem of traditional fixtures being unable to adapt to three-dimensional welding processes, effectively improving the overall welding accuracy of the desk frame. Furthermore, the matching and symmetrical arrangement of connecting slots two and five between fixture one and fixture two further ensures assembly stability and positioning consistency after switching positions, preventing fixture misalignment during welding from affecting processing quality.

[0020] This application features an adaptive positioning clamping component, overcoming the shortcomings of traditional tooling's rigid clamping, uncontrollable force, and easy slippage, significantly improving the stability and adaptability of steel pipe clamping. This tooling utilizes the steel pipe's own weight to trigger a self-locking clamping action. After the pipe is placed, the connecting block is pressed down, and through the linkage of the connecting rod and connecting plate, the clamping plate automatically completes the clamping and fixing, eliminating the need for manual locking. The clamping operation is convenient and efficient. When removing the pipe, the weight is removed, and the spring automatically resets to release the clamping state, simplifying the unloading process and effectively streamlining the clamping and unloading procedures. Simultaneously, the clamping component achieves precise sliding displacement based on the base plate groove and guide block, allowing for precise fine-tuning of the workpiece position according to the pipe's welding location. Combined with multiple sets of telescopic connecting rods and a buffer spring structure, it ensures clamping tightness, preventing pipe loosening, displacement, and deformation caused by welding thermal stress, avoiding quality defects such as uneven welds and misalignment, while also achieving flexible clamping to avoid rigid compression damage to the pipe surface, ensuring the integrity of the workpiece's appearance and reducing subsequent repair costs.

[0021] This tooling integrates multi-functional processing molds, enabling integrated pipe pretreatment and welding shaping, breaking the limitations of traditional processes that separate procedures and dispersed equipment. The processing mold can be rotated 90 degrees via a pin to adapt to different processing postures. The mold surface integrates grooves at various angles (30°, 45°, 60°, etc.) as well as semi-circular and straight grooves, allowing for multi-angle scribing and cutting pretreatment of table frame steel pipes in a single operation. This eliminates the need for multiple processing equipment and tooling changes, effectively reducing material handling and secondary positioning workload, avoiding cumulative errors from multiple positioning steps, and significantly improving pipe pretreatment accuracy and process integration efficiency. It solves the problems of traditional tooling's single function, poor adaptability, and cumbersome processing procedures, and can adapt to the processing needs of multi-specification and multi-angle office desk frame pipes, significantly improving the tooling's versatility. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning and clamping component structure of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the positioning and clamping component structure of the present invention. Figure 2 ; Figure 4 This is a top view of the positioning and clamping assembly of the present invention; Figure 5 for Figure 4 Sectional view of AA in the middle; Figure 6 for Figure 5 Enlarged view of point B; Figure 7 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention; Figure 10 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention.

[0023] In the diagram: 100-Tooling 1; 101-Base plate; 102-Vertical plate; 103-Through groove 1; 104-Connecting groove 2; 105-Connecting groove 3; 106-Connecting groove 4; 107-Pin 1; 108-Slide groove; 109-Connecting rod 1; 110-Spring 1; 111-Clamping plate 1; 200-Tooling 2; 201-Connecting groove 5; 300-Positioning and clamping assembly; 301-Motor; 302-Push rod; 303-Connecting plate 1; 304-Connecting rod 2; 305-Spring 2; 306-Connecting rod 3; 307-Spring 3; 308-Clamping plate 2; 309-Cover; 310-Connecting... Connecting block; 311-Spring 4; 312-Connecting rod 4; 313-Connecting plate 2; 314-Connecting rod 5; 315-Connecting plate 3; 316-Connecting plate 4; 317-Spring 5; 318-Guide block; 319-Connecting box; 400-Processing mold; 401-30-degree groove; 402-45-degree groove; 403-60-degree groove; 404-Semi-circular groove 1; 405-Semi-circular groove 2; 406-Straight groove 1; 407-Straight groove 2; 500-Pin 2; 600-Butt steel pipe; 700-Right angle steel pipe; 800-Right angle tee steel pipe; 900-T-shaped steel pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figure 1-6 The present invention provides a technical solution comprising two sets of tooling bodies that can be flipped and fitted relative to each other, and a hinge pin 500 for hinged to the two sets of tooling bodies. Both sets of tooling bodies can rotate relative to each other via hinge pin 2500, enabling switching between parallel and vertical placement states; Each tooling unit includes a base, a positioning and clamping assembly 300 for adaptive positioning and clamping of the steel pipe of the table frame, and a processing mold 400 for pre-processing of the pipe. The base is composed of an integrated base plate 101 and a vertical plate 102, and the positioning and clamping components 300 are symmetrically assembled in the assembly slots of the base plate 101 and the vertical plate 102.

[0026] The vertical plate 102 has an overall L-shaped structure with varying heights. The top surface of the bottom plate 101 and the side surface of the vertical plate 102 are symmetrically provided with assembly slots for assembling the positioning and clamping assembly 300. The mounting groove of the base plate 101 is provided with a sliding guide structure, and the end of the vertical plate 102 is provided with a mounting groove. A telescopic connecting rod 109 is installed in the mounting groove. A spring 110 is sleeved on the connecting rod 109. A clamping plate 111 for auxiliary clamping and positioning is fixedly connected to the end of the connecting rod 109. The spring 110 is normally in a compressed and energy-storing state.

[0027] Furthermore, the positioning and clamping assembly 300 includes a drive mechanism, a transmission connection mechanism, a clamping execution mechanism, and a sliding guide mechanism; The drive mechanism includes a motor 301 fixed inside the mounting slot of the base plate 101 and a push rod 302 driven to extend and retract by the motor 301. The end of the push rod 302 is connected to a connecting plate 303. The connecting plate 303 is fixedly connected to the connecting box 319 through multiple sets of connecting rods 304. A buffer rebound structure is provided on the connecting rods 304.

[0028] The other end of the connecting box 319 is connected to the connecting plate 313 via multiple sets of connecting rods 312, and a spring 311 is sleeved on the connecting rods 312. Connecting plate 1 303, connecting rod 2 304, connecting plate 2 313, and connecting rod 4 312 are arranged symmetrically around the length centerline of connecting box 319, forming a symmetrical transmission buffer structure.

[0029] The front and rear sides of the connecting box 319 are symmetrically equipped with clamping and actuating structures, which include connecting rod 306, spring 307 and clamping plate 2 308. One end of the connecting rod 306 is fixedly connected to the clamping plate 308, and the other end of the connecting rod 306 is fixedly connected to the side wall of the connecting box 319. The spring 307 is sleeved on the outside of the connecting rod 306. The connecting rod 306 can cooperate with the spring 307 to extend and retract, thereby driving the clamping plate 308 to complete the clamping and releasing action.

[0030] The top of the connecting box 319 is covered with a cover 309, and a vertically sliding connecting block 310 is inserted through the middle of the cover 309; Connecting block 310 has a connecting plate 4 316 fixed at its bottom end. Connecting plate 4 316 is hinged to connecting plate 315 via connecting rod 5 314. Connecting plate 315 is fixedly connected to connecting rod 306. Connecting block 310 is connected to the bottom wall of connecting box 319 via spring 5 317. A guide block 318 is provided at the bottom of the connecting box 319, and the guide block 318 slides in cooperation with the sliding guide structure of the base plate 101.

[0031] The processing mold 400 is hinged to the top of the vertical plate 102 via a pin 107. The processing mold 400 can rotate around the pin 107 to switch postures. The processing mold 400 has grooves of various specifications on its surface. The processing mold 400 can be rotated to be parallel or perpendicular to the vertical plate 102 to adapt to the scribing and cutting pre-processing operations of steel pipes.

[0032] The positioning and clamping assembly 300 adopts a gravity-linked self-locking clamping structure; When the steel pipe is placed above the connecting block 310, it can press down on the connecting block 310 by its own weight, which will drive the connecting plate 316 to move down and compress the spring 317. The connecting rod 314 and the connecting plate 315 will then move together to close the inner side of the connecting rod 306, thus achieving automatic clamping of the steel pipe. After the steel pipe is lifted, the spring 317 will spring back to its original position, and all transmission structures will be reset, releasing the steel pipe from the clamping state.

[0033] The motor 301 can drive the push rod 302 to extend and retract, thereby causing the connecting plate 303 and the connecting box 319 to slide linearly along the sliding guide structure of the base plate 101 through the guide block 318. This can drive the steel pipe material after clamping and fixing to move precisely, complete the adjustment and positioning of the pipe welding position, and adapt to the butt welding operation of multiple types of pipe materials.

[0034] Connecting rod 1 (109), connecting rod 2 (304), connecting rod 3 (306), and connecting rod 4 (312) are all designed to be telescopic, adapting to the clamping and processing needs of different specifications of table frame steel pipes.

[0035] Specifically, the design of this fixture's overall structure primarily addresses the practical production problems encountered in the welding process of existing office desk metal frames, such as fixed fixture posture, limited functionality, poor pipe positioning stability, inconvenient welding position adjustment, and the disconnect between pretreatment and welding processes. Two sets of fixture main bodies form a relatively rotatable combination structure via hinge pin 2500, allowing free switching between parallel and vertical placement. This aims to adapt to the multi-dimensional splicing and welding needs of office desk frame structures, overcoming the limitations of traditional fixed fixtures that can only be shaped in one direction. It avoids frequent workpiece disassembly and reassembly and repeated position calibration during processing, reducing positioning deviations caused by manual intervention and ensuring the verticality and flatness of the overall frame splicing. Each set of fixture main bodies is equipped with a positioning clamping component 300 and a processing mold 400 integrated on the same base. The base adopts an integrated molding structure of bottom plate 101 and vertical plate 102, effectively improving the overall structural strength and stability of the fixture. It is less prone to structural deformation during long-term welding operations, ensuring the consistency of product dimensions during mass production. The pre-reserved assembly slots on the base surface can form a regular assembly and limit constraint on the positioning and clamping component 300, ensuring that the component will not deviate or shake during operation, and providing basic structural support for the accurate positioning and stable clamping of the pipe.

[0036] The vertical plate 102 adopts an L-shaped structure with varying heights, which can accommodate the placement and positioning of pipes of different diameters and heights, expanding the adaptability of the tooling. The sliding guide structure set inside the mounting slot of the base plate 101 provides precise guidance and constraint for the overall sliding movement of the positioning clamping assembly 300, ensuring smooth and stable displacement. The connecting rod 109 and spring 110 mounted inside the mounting slot at the end of the vertical plate 102 form an auxiliary clamping structure with the clamping plate 111. The spring 110 is normally kept in a compressed and energy-storing state, which can continuously provide a pressing constraint force to the clamping plate 111, and provide auxiliary limiting and fixing of the side of the pipe, avoiding lateral displacement of the pipe during clamping, sliding and welding, further improving the overall stability of pipe positioning and reducing workpiece misalignment caused by welding thermal deformation.

[0037] The positioning and clamping assembly 300 is composed of a drive mechanism, a transmission connection mechanism, a clamping execution mechanism, and a sliding guide mechanism. The entire structure works in tandem to achieve automated positioning, clamping, and position adjustment of the pipe. The motor 301 is fixed inside the mounting slot of the base plate 101, providing stable driving force. The extension and retraction of the push rod 302 provides power support for the displacement adjustment of the overall clamping structure. The connecting plate 303 connected to the end of the push rod 302 is fixed to the connecting box 319 via multiple connecting rods 304. The buffer and spring-loaded structure on the connecting rods 304 provides a buffering and shock-absorbing effect during clamping and displacement, preventing structural vibration and pipe compression damage caused by rigid transmission, making the clamping and adjustment process smoother. The other end of the connecting box 319 is connected to the connecting plate 313 via a connecting rod 312. A spring 311 sleeved on the outside of the connecting rod 312 works in conjunction with the buffer and spring-loaded structure to create a bidirectional buffering effect, further optimizing the overall transmission stability. Connecting plate 1 303, connecting rod 2 304, connecting plate 2 313, and connecting rod 4 312 are symmetrically arranged along the center line of the length of connecting box 319. This ensures that the overall structure is subjected to uniform force, avoids structural tilting and positioning deviation caused by unilateral force, and improves the symmetry and stability of the structure during operation.

[0038] The core clamping and actuation structure consists of connecting rods 306, springs 307, and clamping plates 308 symmetrically arranged on both sides of the connecting box 319. The symmetrical arrangement of multiple clamping structures allows for simultaneous application of clamping force from both sides of the pipe, ensuring the pipe is centered after clamping and preventing unilateral offset. Connecting rods 306, in conjunction with springs 307, can extend and retract, thereby driving clamping plates 308 to move closer and further away, achieving both clamping and releasing of the pipe. This flexible clamping, achieved through the elastic extension and retraction of the mechanical structure, can accommodate pipes with slight dimensional differences while avoiding surface indentations and deformation caused by rigid clamping, effectively protecting the integrity of the workpiece's appearance.

[0039] The cover 309 on top of the connecting box 319 provides a sealed protection for the internal transmission structure, preventing welding fumes, iron filings, and other impurities from entering the structure. This avoids structural jamming and movement failure caused by impurities, extending the tooling's service life. The connecting block 310, which passes through the center of the cover 309, can slide vertically. The bottom-fixed connecting plate 316 forms a hinged linkage structure with the connecting plate 315 via the connecting rod 314. The connecting plate 315 is fixedly connected to the connecting rod 306, and together with the spring 317 mounted at the bottom of the connecting block 310, a complete gravity-driven linkage transmission system is formed. In actual use, this structure relies on the pipe's own weight for self-locking clamping. After the pipe is placed, the connecting block 310 is pressed down, causing the connecting plate 316 to move downwards and compress the spring 317. The hinged connecting rod 314 then pulls the connecting plate 315 inwards, causing the clamping plate 308 to automatically clamp the pipe. This eliminates the need for manual locking, simplifying the clamping process and reducing manual labor intensity. After the pipe is removed, the external pressure disappears, and the spring 317 rebounds and resets, causing all linkage structures to reset and open, automatically releasing the clamping state. This makes material handling convenient and efficient, effectively improving loading and unloading efficiency and adapting to batch continuous production operations.

[0040] The guide block 318 at the bottom of the connecting box 319 matches the sliding guide structure of the base plate 101, allowing the entire clamping assembly to slide precisely in a straight line along the groove direction. This ensures a smooth and accurate pipe position adjustment process without any offset, jamming, or tilting, providing structural support for precise positioning of the pipe for butt welding. The processing mold 400, hinged to the top of the vertical plate 102 via pin 107, can freely rotate around pin 107, switching between parallel and vertical states to adapt to different pipe pretreatment requirements. The various specifications of grooves on the surface of the processing mold 400 allow for direct marking and cutting pretreatment of the pipe before welding, integrating the pipe pretreatment process with the welding shaping process. This eliminates the need for separate pretreatment equipment, reduces material transfer and secondary positioning, avoids cumulative errors from multiple positioning steps, and significantly improves pipe processing accuracy and process connection efficiency.

[0041] The adjustable mechanism of the extension and retraction of the push rod 302 driven by motor 301 allows for synchronous displacement of the overall clamping structure and the clamped and fixed pipe, precisely adjusting the pipe's docking position. This meets the positioning requirements for butt welding and contact welding of multiple pipes, adapts to the welding and forming requirements of different table frame structures, and enhances the versatility and adaptability of the tooling. Connecting rods 109, 304, 306, and 312 all adopt a telescopic structure, adaptively adjusting their length and clamping distance according to the actual specifications of the pipe. This allows for the processing of office desk frame pipes of different diameters and sizes, overcoming the limitation of traditional tooling that can only accommodate single-specification workpieces. This significantly reduces enterprise tooling procurement costs and changeover / adjustment time, effectively improving the overall processing accuracy, production efficiency, and finished product qualification rate of office desk frames.

[0042] The following is combined Figures 1 to 6 The process of using this fixture for butt welding of steel pipes is described in detail as follows: First, the steel pipe to be processed is placed on the base plate 101. Under its own weight, the steel pipe presses down on the connecting block 310, causing the connecting block 310 to move downwards. Simultaneously, this causes the connecting plate 316 to move downwards and compress the spring 317. During the downward movement of the connecting plate 316, the hinged end of the connecting rod 314 moves downwards synchronously with the hinged end of the connecting plate 316. This causes the hinged end of the connecting rod 314 to move closer to the connecting plate 316, thereby causing the connecting plate 315 and the connecting rod 306 to move inwards synchronously, ultimately completing the automatic clamping and positioning of the steel pipe to be processed.

[0043] After the steel pipe is clamped, the motor 301 is started, which drives the push rod 302 to extend, and the push rod 302 pushes the connecting plate 303 to move as a whole. The connecting plate 303 drives the connecting box 319 and the connecting plate 313 to move synchronously. The whole thing slides smoothly along the length of the slide groove 108 and the connecting groove 105 through the guide block 318 at the bottom. After the steel pipe moves to the preset welding position, the motor 301 is turned off to lock the processing position.

[0044] Subsequently, welding operations are performed on the joint of the butt-joint steel pipes 600, sequentially completing the welding processes for the upper surface joint and the right side joint of the butt-joint steel pipes 600. After the welding on one side is completed, the butt-joint steel pipes 600 are lifted from above the connecting block 310. The connecting block 310 is no longer under vertical pressure, and spring five 317 rebounds from its compressed state, driving connecting plate four 316 to reset from bottom to top. Connecting plate four 316 drives the hinged end of connecting rod five 314 upward, causing the hinged end of connecting rod five 314 and connecting plate three 315 to open away from connecting plate four 316. Simultaneously, connecting plate three 315 and connecting rod three 306 reset outward, releasing the clamping constraint on the steel pipe, allowing the butt-joint steel pipes 600 to be removed. The workpiece is rotated 90 degrees clockwise and repositioned for clamping, completing the welding operations for the remaining two joints, ultimately completing the butt-joint welding process of the steel pipes.

[0045] Example 2: Combination Figures 1 to 6 , Figure 8 The welding process of the right-angle seam of the steel pipe using this tooling is described. The difference between this embodiment and Embodiment 1 lies in the tooling posture and the pipe pretreatment process. Before welding, tooling 200 is rotated 90 degrees clockwise along pin 2500, so that tooling 100 and tooling 200 form a right-angle fit structure to accommodate the welding forming requirements of the right-angle steel pipe 700. For the processing requirements of the right-angle steel pipe 700, a 45-degree angle cut needs to be pre-processed on the pipe surface. Before cutting, the right-angle steel pipe 700 is clamped and positioned according to the positioning method in Embodiment 1.

[0046] After the pipe is positioned, the processing mold 400 is rotated 90 degrees clockwise or counterclockwise along the pin 107 until it is in contact with the outer wall of the right-angle steel pipe 700. The 45-degree groove 402 on the processing mold 400 is then used to precisely scribing and pre-cut the right-angle steel pipe 700. After cutting, the motor 301 is started according to the operation method in Example 1 to complete the pipe docking displacement adjustment and positioning fixation.

[0047] Subsequently, the joints of the right-angle steel pipe 700 are welded. First, on the inner side of the right angle formed by fixture 100 and fixture 200, the welding work on the upper surface joint and the right side joint of the workpiece is completed. After the inner side welding is completed, the right-angle steel pipe 700 is removed, the workpiece is rotated 180 degrees clockwise, and placed on the outer side of the fixture to complete the welding of the remaining joints. The workpiece disassembly process is the same as in Example 1, and finally the overall welding work of the right-angle steel pipe 700 is completed.

[0048] Example 3: Combination Figures 1 to 6 , Figure 9 , Figure 10 The welding process of the right-angle tee steel pipe 800 is described below. First, referring to the operation method of Example 2, the tooling 100 and tooling 200 are switched from a parallel straight line form to a right-angle mating form. The square steel pipe to be processed is selected, and the square steel pipe is clamped and fixed according to the positioning and clamping process of Example 1. Then, referring to the operation method of Example 2, the processing mold 400 is flipped, and the 45-degree groove 402 is used to complete the 45-degree cutting process on the top and left side of the square steel pipe, respectively, to obtain the pipe shape suitable for the tee welding structure.

[0049] After the pipe is cut, the clamping assembly is slidable by motor 301 to complete the horizontal pipe docking and positioning. Then, the cut square steel pipe is placed vertically, and the clamping plate 111 at the vertical plate 102 is manually pulled outwards, causing the connecting rod 109 and spring 110 to extend outwards, further stretching and storing energy in spring 110. After releasing clamping plate 111, the stretched spring 110 generates a rebound force, pulling clamping plate 111 to automatically reset and clamp the vertical square steel pipe, completing the auxiliary positioning and fixing of the vertical pipe.

[0050] After positioning, the joint between the inner right angle of tooling 100 and tooling 200 is welded first. After the inner weld is processed, the workpiece is placed in a different position, and the right-angle tee steel pipe 800 is placed outside the right angle of the tooling to complete the welding of the remaining joints. Finally, the welding and forming of the whole right-angle tee steel pipe 800 is completed.

[0051] Example 4: Combination Figures 1 to 6 , Figure 10 The welding process of T-shaped steel pipe 900 is described in this embodiment, which is applicable to the butt welding of T-shaped structural pipes. Unlike the previous embodiment, this embodiment requires tooling 100 and tooling 200 to be kept in a parallel straight line shape, forming two sets of straight tooling components. The two sets of tooling components are then arranged vertically on the surface of the permanent magnet chuck. The permanent magnet chuck is used to fix and limit the overall tooling, preventing tooling offset and shaking during processing.

[0052] The horizontal and vertical square steel pipes are placed on two sets of tooling components respectively. The subsequent operation process, such as gravity self-locking clamping of the pipe, motor-driven alignment, joint welding, and workpiece disassembly, is the same as that in Examples 1, 2, and 3. The pipe is positioned and welded at multiple angles by the cooperation of two sets of vertical tooling, and finally the T-shaped steel pipe is welded into a whole at 90°.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A welding fixture for an office desk frame, characterized in that: It includes two sets of tooling bodies that can be flipped and fitted relative to each other, and a second hinge pin (500) for hinged to the two sets of tooling bodies. Both sets of tooling bodies can rotate relative to each other via the second hinge pin (500), enabling switching between parallel and vertical placement states; Each set of tooling bodies includes a base, a positioning and clamping assembly (300) for adaptive positioning and clamping of the table frame steel pipe, and a processing mold (400) for pipe pretreatment processing. The base is composed of an integrated base plate (101) and a vertical plate (102), and the positioning and clamping assembly (300) is symmetrically assembled in the assembly slots of the base plate (101) and the vertical plate (102).

2. The welding fixture for an office desk frame according to claim 1, characterized in that: The vertical plate (102) has an overall L-shaped structure with varying heights. The top surface of the bottom plate (101) and the side surface of the vertical plate (102) are symmetrically provided with assembly slots for assembling the positioning clamping assembly (300). The mounting groove of the base plate (101) is provided with a sliding guide structure, and the end of the vertical plate (102) is provided with an installation groove. A telescopic connecting rod (109) is installed in the installation groove. A spring (110) is sleeved on the connecting rod (109). A clamping plate (111) for auxiliary clamping and positioning is fixedly connected to the end of the connecting rod (109). The spring (110) is normally in a compressed and energy-storing state.

3. The welding fixture for an office desk frame according to claim 1, characterized in that: The positioning and clamping assembly (300) includes a drive mechanism, a transmission connection mechanism, a clamping execution mechanism, and a sliding guide mechanism; The driving mechanism includes a motor (301) fixed inside the mounting slot of the base plate (101) and a push rod (302) that is driven to extend and retract by the motor (301). The push rod (302) is connected to a connecting plate (303) at its end. The connecting plate (303) is fixedly connected to the connecting box (319) through multiple sets of connecting rods (304). The connecting rods (304) are equipped with a buffer rebound structure.

4. The welding fixture for an office desk frame according to claim 3, characterized in that: The other end of the connecting box (319) is connected to the connecting plate (313) via multiple sets of connecting rods (312), and a spring (311) is sleeved on the connecting rods (312). The connecting plate 1 (303), the connecting rod 2 (304), the connecting plate 2 (313), and the connecting rod 4 (312) are arranged symmetrically with respect to the length center line of the connecting box (319) to form a symmetrical transmission buffer structure.

5. The welding fixture for an office desk frame according to claim 4, characterized in that: The connecting box (319) is symmetrically equipped with clamping execution structures on its front and rear sides. The clamping execution structures include connecting rod three (306), spring three (307) and clamping plate two (308). One end of the connecting rod three (306) is fixedly connected to the clamping plate two (308), and the other end of the connecting rod three (306) is fixedly connected to the side wall of the connecting box (319). The spring three (307) is sleeved on the outside of the connecting rod three (306). The connecting rod three (306) can cooperate with the spring three (307) to stretch and deform, thereby driving the clamping plate two (308) to complete the clamping and releasing action.

6. The welding fixture for an office desk frame according to claim 5, characterized in that: The top of the connecting box (319) is covered with a cover (309), and a vertically sliding connecting block (310) is inserted through the middle of the cover (309). The bottom end of the connecting block (310) is fixed with a connecting plate four (316), and the connecting plate four (316) is hinged to a connecting plate three (315) through a connecting rod five (314). The connecting plate three (315) is fixedly connected to the connecting rod three (306); the connecting block (310) is connected to the bottom wall of the connecting box (319) through a spring five (317). The bottom of the connecting box (319) is provided with a guide block (318), which slides in cooperation with the sliding guide structure of the base plate (101).

7. The welding fixture for an office desk frame according to claim 1, characterized in that: The processing mold (400) is hinged to the top of the vertical plate (102) via a pin (107), and the processing mold (400) can rotate around the pin (107) to switch postures; The processing mold (400) has a variety of groove structures on its surface. The processing mold (400) can be rotated to be parallel or perpendicular to the vertical plate (102) to adapt to the scribing and cutting pretreatment operations of steel pipes.

8. The welding fixture for an office desk frame according to claim 6, characterized in that: The positioning and clamping assembly (300) adopts a gravity-linked self-locking clamping structure; When the steel pipe is placed above the connecting block (310), it can press down on the connecting block (310) by its own weight, which will drive the connecting plate four (316) to move down and compress the spring five (317). The connecting rod five (314) and the connecting plate three (315) will be linked together to close the inner side of the connecting rod three (306), thereby realizing the automatic clamping of the steel pipe. After the steel pipe is lifted, the spring five (317) will rebound and reset, and the transmission structure will be reset to release the clamping state of the steel pipe.

9. The welding fixture for an office desk frame according to claim 8, characterized in that: The motor (301) can drive the push rod (302) to extend and retract, thereby driving the connecting plate (303) and the connecting box (319) to slide linearly along the sliding guide structure of the base plate (101) through the guide block (318). This can drive the steel pipe material after clamping and fixing to move precisely, complete the adjustment and positioning of the pipe welding position, and adapt to the butt welding operation of multiple types of pipe materials.

10. The welding fixture for an office desk frame according to claim 9, characterized in that: The first connecting rod (109), the second connecting rod (304), the third connecting rod (306), and the fourth connecting rod (312) are all designed to be telescopic to adapt to the clamping and processing needs of different specifications of table frame steel pipes.

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