A welding auxiliary positioning device for sheet metal part machining

Abstract

The application provides a welding auxiliary positioning device for sheet metal part machining, and belongs to the technical field of sheet metal part machining. The device comprises a positioning and clamping mechanism and a centering and limiting mechanism. The positioning and clamping mechanism is provided with a clamping table, the clamping table is provided with a positioning groove, the two sides of the positioning groove are provided with a first electric cylinder with a first piston rod, the piston rod is connected with a clamping plate, and a cavity is formed in the clamping table. The centering and limiting mechanism comprises a fixing frame, a movable plate, a fixed plate, a sliding assembly, a driving assembly and a centering assembly. The centering plate of the centering assembly forms a 90° angle with the fixed plate. The application solves the problem that the existing device lacks an automatic centering mechanism, the manual centering efficiency is low, the precision is insufficient, and it is difficult to meet the high-precision welding requirements of right-angle butt joint plates, bent plates and other workpieces. The driving assembly is linked to realize automatic centering and front and rear limiting, the positioning and clamping mechanism is used for left and right clamping, automatic operation is realized throughout the process except for initial piece placing, the positioning is accurate, the efficiency is high, and the adaptability is strong.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal part processing, in particular to a welding auxiliary positioning device for sheet metal part processing. BACKGROUND

[0002] Sheet metal part welding processing is a widely used process in modern manufacturing industry, especially in the fields of automobiles, aerospace, electronic equipment, etc. The welding of sheet metal parts such as bent plates and right-angle butt plates is particularly common. However, during the welding process, the weld area undergoes rapid thermal expansion and contraction, and the weld will produce significant shrinkage stress. This stress directly causes the two plate parts to "tighten" (i.e. angular deformation), causing the preset butt angle to be misaligned; at the same time, for thin plate parts, thermal stress is also prone to cause "wavy deformation", resulting in uneven wrinkles on the plate surface, which seriously affects the dimensional accuracy and appearance quality of the product. These deformation problems not only reduce the functionality of the welded parts, but also increase the cost of subsequent finishing processes, limiting production efficiency.

[0003] To overcome the above welding deformation problems, fixtures are usually used to forcibly position the workpieces to be welded to limit the free movement of the plate parts and maintain the preset butt angle and plate flatness as much as possible. For example, the prior art (Chinese utility model patent, application number CN202322773689.9) discloses a positioning auxiliary device for sheet metal part processing, which uses the clamping block and auxiliary clamping plate on the fixed seat to achieve clamping and positioning of the sheet metal part by driving the bidirectional screw rod and air cylinder with the forward and reverse motor. The device can adapt to the clamping needs of some special-shaped sheet metal parts through the groove design on the clamping block, and to some extent, improve the positioning stability.

[0004] However, the device has the following obvious defects: the device relies on manual placement of the sheet metal part and uses mechanical movement of the clamping block and auxiliary clamping plate to achieve positioning, lacking an automatic or semi-automatic centering mechanism. The operator needs to manually adjust the position of the sheet metal part to align the clamping point, especially for workpieces such as bent plates or right-angle butt plates that require precise angle control. Manual centering is time-consuming and inefficient, and requires high skills from the operator, which is prone to human error. SUMMARY

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above and / or existing problems in the prior art, the present application is proposed.

[0007] Therefore, the present application aims to solve the technical problem that the existing sheet metal welding positioning device lacks automatic or semi-automatic centering mechanism, resulting in low efficiency and insufficient precision of manual centering, and is difficult to meet the demand for high-precision welding of workpieces such as bent plates or right-angle butt plates.

[0008] To solve the above technical problems, the present application provides the following technical scheme: A welding auxiliary positioning equipment for sheet metal machining, comprising a positioning and clamping mechanism, including a clamping table, a positioning groove is opened on the upper surface of the clamping table, first electric cylinders are symmetrically installed on the left and right sides outside the positioning groove, a first piston rod is movably connected inside each of the two first electric cylinders, a clamping plate is fixedly connected inside the positioning groove from the opposite sides of the two first piston rods and extending into the positioning groove, and a cavity is opened at the center of the inside of the clamping table.

[0009] Further, a centering and limiting mechanism is provided, comprising a fixed frame fixedly installed at the bottom of the cavity, an activity plate is slidably connected to the front end of the fixed frame, a fixed plate is fixedly installed at the rear end of the fixed frame, the top ends of the activity plate and the fixed plate both penetrate the inner top wall of the cavity and extend into the positioning groove, sliding assemblies are symmetrically installed on the left and right sides of the top ends of the activity plate and the fixed plate, a receiving plate is slidably connected to the middle of the fixed frame, the bottom end of the fixed frame is drivingly connected to the receiving plate and the activity plate through a driving assembly, vertical plates are symmetrically installed on the left and right sides of the top end of the receiving plate, and a centering assembly is drivingly connected to the opposite sides of the two vertical plates through a driving block.

[0010] As a preferred scheme of the welding auxiliary positioning equipment for sheet metal machining, the front side of the top end of the cavity is provided with an open mouth, the upper part of the activity plate is slidably connected in the open mouth, a limiting groove is opened at the rear end of the open mouth, a limiting plate is slidably connected inside the limiting groove, a baffle is fixedly connected to the front end of the limiting plate, the front end of the baffle extends into the open mouth and is fixedly connected to the rear wall of the activity plate, and the baffle and the activity plate jointly shield the open mouth.

[0011] As a preferred scheme of the welding auxiliary positioning equipment for sheet metal machining, a support column is fixedly installed at the top of the rear end of the cavity, and a support plate is fixedly connected to the bottom end of the support column.

[0012] As a preferred scheme of the welding auxiliary positioning equipment for sheet metal machining, the centering assembly comprises a lifting plate slidably sleeved outside the support column, the bottom end of the lifting plate is fixedly connected to the support plate through a telescopic spring, transmission plates are symmetrically installed on the left and right sides of the top end of the lifting plate, a centering plate is fixedly installed at the rear side of the lifting plate, and the top end of the centering plate penetrates the cavity and extends into the positioning groove.

[0013] As a preferred scheme of the welding auxiliary positioning device for sheet metal part machining, the centering plate is arranged vertically with the fixed plate, the back wall of the centering plate is attached to the front wall of the fixed plate, is located in the middle of the fixed plate, and forms an included angle with the two sides of the fixed plate to achieve accurate centering of the right-angle butt joint plate or the bent plate.

[0014] As a preferred scheme of the welding auxiliary positioning device for sheet metal part machining, the front side of each of the two transmission plates is provided with an oblique slot with a low front end and a high rear end, the rear end of the oblique slot is connected to a straight slot, and the two drive blocks are respectively connected to the lowest end of the front end of the oblique slot in a sliding manner.

[0015] As a preferred scheme of the welding auxiliary positioning device for sheet metal part machining, the drive assembly comprises a second electric cylinder fixedly connected to the bottom of the fixed plate, a second piston rod movably connected to the inside of the second electric cylinder, and a bottom wall of the receiving plate fixedly connected to the front end of the second piston rod.

[0016] As a preferred scheme of the welding auxiliary positioning device for sheet metal part machining, the drive assembly further comprises a rotating shaft rotatably connected to the center of the upper surface of the receiving plate, and an active rod is hingedly connected to the front and rear ends of the rotating shaft, the front side of the active rod at the front end is hingedly connected to the back wall of the movable plate, and the rear side of the active rod at the rear end is hingedly connected to the front wall of the fixed plate.

[0017] As a preferred scheme of the welding auxiliary positioning device for sheet metal part machining, the sliding assembly comprises a plurality of rotating shafts rotatably connected to the front side of the fixed plate, a gear fixedly installed on the outer surface of each of the rotating shafts, and a sliding belt meshingly connected to the outer surfaces of the gears.

[0018] As a preferred scheme of the welding auxiliary positioning device for sheet metal part machining, the four groups of sliding assemblies are each composed of a rotating shaft, a gear, and a sliding belt, and the front two groups of sliding assemblies are arranged on the rear side of the movable plate, and the rear two groups of sliding assemblies are arranged on the front side of the fixed plate.

[0019] The present application has the following advantages:

[0020] The 90° included angle formed by the centering plate and the fixed plate provides a natural positioning reference, and the linkage control of the drive mechanism realizes the automatic centering of workpieces such as right-angle butt joint plates and bent plates. The worker only needs to simply place the workpiece, and the device can accurately complete the centering and limiting through mechanical transmission without the need for manual repeated calibration and observation. Not only is the positioning accuracy improved to the millimeter level, but also the alignment deviation caused by human operation is completely avoided, and the skill level requirement for the operator is significantly reduced.

[0021] With the help of the double fixing structure of "front and rear limit + left and right clamping", the device realizes the stable fixing of sheet metal parts. The front and rear sliding assembly can not only prevent the front and rear deviation of the workpiece due to thermal stress through flexible contact, but also allow the workpiece to smoothly slide in the left and right directions to adapt to the alignment requirements; the left and right clamping mechanism can adapt to workpieces of different thicknesses through precise pressure adjustment, and can avoid scratching caused by clamping. This design not only adapts to right-angle workpieces, but also is compatible with rectangular sheet metal parts of various sizes, greatly improving the versatility and positioning reliability of the device.

[0022] In addition to the initial workpiece placement, the device automatically completes the centering, limiting and clamping throughout the process, each action seamlessly connects, the positioning time is shortened to tens of seconds, and the efficiency is 3-5 times higher than traditional manual positioning. At the same time, high-strength base material, wear-resistant transmission components and closed internal structure design reduce the erosion of welding impurities and mechanical wear and tear, prolong the equipment maintenance cycle, reduce the failure rate and maintenance cost, and further ensure the production continuity and long-term use benefits. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Among them:

[0025] Fig. 1 It is a perspective view of the overall structure of the present application;

[0026] Fig. 2 It is a perspective side view of the present application;

[0027] Fig. 3 It is a perspective view of the centering and limiting mechanism of the present application;

[0028] Fig. 4 It is a perspective view of the connection state of the driving assembly and the bearing plate, fixed plate of the present application;

[0029] Fig. 5 It is a perspective view of the connection between the centering assembly and the clamping table of the present application;

[0030] Fig. 6 It is a perspective view of the connection between the sliding assembly and the fixed plate of the present application;

[0031] In the figure:

[0032] 100, positioning and clamping mechanism; 101, clamping table; 101a, cavity; 101b, open mouth; 101c, limiting groove; 102, positioning groove; 103, first electric cylinder; 104, first piston rod; 105, clamping plate; 106, support column; 107, support plate;

[0033] 200, centering and limiting mechanism; 201, fixed frame; 202, movable plate; 203, fixed plate; 204, sliding assembly; 204a, rotating shaft; 204b, gear; 204c, sliding belt; 205, receiving plate; 206, driving assembly; 206a, second electric cylinder; 206b, second piston rod; 206c, rotating lever; 206d, movable lever; 207, vertical plate; 208, driving block; 209, centering assembly; 209a, lifting plate; 209b, extension spring; 209c, transmission plate; 209c1, oblique slot; 209c2, straight slot; 209d, centering plate; 210, limiting plate; 211, baffle. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] In the following description, a lot of specific details are set forth in order to give a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0036] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0037] Embodiments

[0038] Reference Figs. 1-6 The disclosed welding auxiliary positioning equipment for sheet metal machining mainly consists of two parts, positioning and clamping mechanism 100 and centering and limiting mechanism 200, which cooperates to realize automatic centering and accurate positioning of sheet metal, greatly improving the precision and efficiency of welding machining.

[0039] The positioning and clamping mechanism 100 is the bearing and left and right clamping core of the device, and its basic component is a clamping table 101 made of high-strength cast iron material. The surface is subjected to aging treatment to eliminate internal stress, which can provide a stable support matrix for the entire device and avoid structural deviation caused by welding vibration. The positioning groove 102 is provided on the upper surface of the clamping table 101, and the groove depth and width can be adapted to various common specifications of bent plates, right-angle butt plates and other sheet metal parts. The inner side wall of the groove is polished to reduce friction damage when the workpiece is placed. At the same time, the groove boundary limits the initial placement range of the workpiece, reducing the subsequent centering difficulty. The first electric cylinder 103 is symmetrically installed on the left and right sides outside the positioning groove 102, which adopts a precision cylinder structure driven by a servo motor, and can realize millimeter-level regulation and control of the piston rod extension amount, providing stable and controllable power for the clamping action. The first piston rod 104 is movably connected inside the first electric cylinder 103 and is made of chromium-plated alloy material, which has rigidity and wear resistance, and can smoothly transfer the cylinder power to the clamping plate 105 inside the positioning groove 102. The opposite surfaces of the two clamping plates 105 are pasted with polyurethane elastic non-slip pad layers, which can tightly fit the surface of the sheet metal part during clamping, enhance the clamping stability to resist welding stress, and avoid hard contact and scratch the appearance of the workpiece. The cavity 101a is provided at the center of the clamping table 101, which not only provides a sealed installation space for all components of the centering and limiting mechanism 200, but also can isolate the welding slag and high temperature caused by welding spatter, protecting the internal precision transmission components from damage.

[0040] The centering and limiting mechanism 200 is the key to realize automatic centering, and its core support component is a fixed frame 201 fixedly installed at the bottom of the cavity 101a. The fixed frame is made of an integral alloy steel structure, and the surface is milled to ensure flatness, providing precise sliding guide rails for movable components such as the movable plate 202 and the receiving plate 205, ensuring the consistency of the movement trajectories of the components. The fixed plate 203 is fixed at the rear end of the fixed frame 201, and the front end surface is subjected to precise grinding treatment as a fixed reference surface for front and rear limiting of the workpiece, providing a reliable reference for the centering action. The movable plate 202 is slidably connected to the front end of the fixed frame 201, and a ball slide is provided at the sliding connection between the bottom of the movable plate and the fixed frame, which can greatly reduce the sliding resistance, allowing the movable plate to move flexibly forward and backward along the length direction of the fixed frame. In combination with the fixed plate 203, a front and rear limiting structure with adjustable spacing is formed, which is suitable for different lengths of sheet metal part processing requirements.

[0041] The open mouth 101b at the top front side of the cavity 101a is a passage of the upper part of the movable plate 202 extending to the positioning groove 102, and the inner side wall is inlaid with a wear-resistant copper sleeve to reduce wear and prolong service life when the movable plate slides; the limiting plate 210 connected to the limiting groove 101c at the rear end of the open mouth 101b forms a linkage protection structure with the baffle 211 fixedly connected to the rear wall of the movable plate 202, and when the limiting plate 210 synchronously slides along the limiting groove 101c, the movable plate 202 can be provided with additional guiding support to avoid left and right deflection when it slides a long distance, and meanwhile, the combined design of the baffle 211 and the movable plate 202 can completely shield the open mouth 101b and completely block the path of impurities such as slag and dust into the cavity 101a, thereby ensuring the cleanliness and smooth operation of the internal components.

[0042] The support column 106 fixedly installed at the top rear end of the cavity 101a adopts a solid cylindrical structure and is subjected to chrome plating hardening treatment, and has low surface roughness, thereby providing smooth vertical guidance for the lifting plate 209a slidingly sleeved thereon; the support plate 107 fixedly connected to the bottom end of the support column 106 is made of thickened steel plate, which not only provides a stable lower support point for the extension spring 209b, but also enhances the anti-overturning ability of the support column 106 through the connection structure with the inner wall of the cavity 101a, thereby avoiding shaking of the assembly 209 during operation.

[0043] The centering assembly 209 undertakes the core function of automatic centering: the lifting plate 209a sleeved outside the support column 106 slides, realizes strict vertical lifting movement through the rigid guide of the support column, ensures the movement direction of the centering plate 209d to be accurate and correct; the extension spring 209b connected between the bottom end of the lifting plate 209a and the support plate 107 is made of stainless steel with high elastic coefficient, has good fatigue resistance and reset performance, and can quickly drive the lifting plate 209a and the centering plate 209d to reset to the initial position after the centering action is completed, so as to prepare for the next centering operation; the transmission plate 209c symmetrically installed at the top end of the lifting plate 209a, the oblique slot 209c1 with the front end low and the rear end high opened in the front side of the transmission plate 209c, the smooth curve design adopted by the oblique slot 209c1 can efficiently convert the horizontal backward movement of the driving block 208 into the vertical downward movement of the transmission plate, and the force transmission process is stable and free of impact, while the straight slot 209c2 connected with the rear end of the oblique slot 209c1 can make the centering assembly 209 stop lifting when the driving block 208 moves to the intersection of the two, so as to ensure that the upper surface of the centering plate 209d always keeps the same horizontal plane with the upper surface of the positioning groove 102, and avoid affecting the alignment accuracy of the sheet metal part due to the protrusion or depression of the centering plate; the centering plate 209d fixedly installed at the rear side of the lifting plate 209a is made of high-strength aluminum alloy, is vertically arranged with the fixed plate 203 and tightly abuts against the rear wall of the fixed plate 203, and is located at the central position of the fixed plate 203, so that the two sides form a 90° angle with the two sides of the fixed plate 203, which is specially adapted to the welding seam positioning of the right-angle butt joint plate or the bent plate, can make the butt joint edges of the workpiece accurately abut against the vertex of the angle, and eliminate the positional deviation easily caused by manual centering from the source.

[0044] The driving assembly 206 provides power transmission and conversion for the centering and limiting action: the second electric cylinder 206a fixedly connected at the bottom of the fixed plate 203 is of the same model as the first electric cylinder 103, and can realize precise regulation and control of the extension and retraction speed and stroke through the control system. The second piston rod 206b movably connected inside the second electric cylinder 206a is fixedly connected with the bottom wall of the receiving plate 205 at the front end, and can directly transmit the linear power of the cylinder to the receiving plate to drive the receiving plate to move stably forward and backward along the fixed frame 201. The driving assembly 206 further comprises a rotating shaft 206c rotatably connected to the center of the upper surface of the receiving plate 205. The rotating shaft 206c is connected with the receiving plate 205 by a wear-resistant bearing and can rotate flexibly to adapt to the power transmission demand. The front and rear ends of the rotating shaft 206c are hingedly connected with the front and rear ends of the movable rods 206d. The front side of the front movable rod 206d is hingedly connected with the rear wall of the movable plate 202, and the rear side of the rear movable rod 206d is hingedly connected with the front wall of the fixed plate 203, forming a parallel link transmission mechanism. When the receiving plate 205 moves backward, the rotating shaft 206c moves backward synchronously with the receiving plate 205, and simultaneously drives the front and rear movable rods 206d to rotate around the hinge points. The front movable rod can pull the movable plate 202 to slide backward along the fixed frame 201. This transmission mode can ensure that the moving speed of the movable plate 202 and the receiving plate are in a suitable proportional relationship, and the movement process is linear and stable, avoiding sudden stop and rapid movement.

[0045] The sliding assembly 204 is provided with four groups, each group comprising a rotating shaft 204a, a gear 204b and a sliding belt 204c. The front two groups of sliding assemblies 204 are symmetrically arranged on the rear side of the movable plate 202, and the rear two groups of sliding assemblies 204 are symmetrically arranged on the front side of the fixed plate 203. The plurality of rotating shafts 204a in each group of sliding assemblies are uniformly distributed, and the stepped shaft structure is adopted to enhance the support stability. The gears 204b fixedly installed on the outer surface of the rotating shafts 204a are in precise engagement with the inner teeth of the sliding belts 204c, ensuring smooth operation of the sliding belts 204c with the gears 204b. The sliding belts 204c are made of wear-resistant rubber material and have a fiber reinforced layer, and have a slight elasticity on the surface. When the movable plate 202 moves backward to the point where the sliding belt 204c on the rear wall of the movable plate 202 abuts against the front wall of the metal part and the sliding belt 204c at the front end of the fixed plate 203 abuts against the rear wall of the metal part, the sliding belt 204c can limit the forward and backward displacement of the workpiece by friction with the surface of the workpiece, and can allow the workpiece to slide slightly along the surface of the sliding belt 204c during subsequent left and right clamping, providing a moving space for the alignment of the two metal parts. The elastic sliding belt 204c can also avoid causing pressure marks or scratches on the surface of the metal part.

[0046] The specific operation process of the device is as follows: first, the workers abut the right angles of the two sheet metal parts to be welded at the two 90° angles formed by the centering plate 209d and the fixed plate 203, respectively, by means of the precise vertical relationship between the centering plate 209d and the fixed plate 203, the side of the two sheet metal parts that needs to be welded can be quickly in a relatively parallel state, this step does not need to be repeated by manual calibration, greatly simplifying the initial positioning process. Then the workers start the second electric cylinder 206a, the second electric cylinder 206a drives the second piston rod 206b at the front end to stretch back and move to the inside of the cylinder, the second piston rod 206b pulls the receiving plate 205 to slide smoothly along the middle of the fixed frame 201 back. During the movement of the receiving plate 205, the rotating rod 206c on it moves backward synchronously, the movable rod 206d at the front and back ends pulls the movable plate 202 at the front end to slide back along the opening 101b, at the same time, the baffle 211 on the rear wall of the movable plate 202 drives the limiting plate 210 to move along the limiting groove 101c synchronously, always shielding the gap of the opening 101b, preventing impurities from entering the cavity 101a.

[0047] In the initial stage of the movement of the receiving plate 205 back, the vertical plate 207 at the top end of it drives the driving block 208 to move horizontally backward synchronously. Since the driving block 208 is initially located at the lowest end of the oblique slot 209c1 at the front end, the horizontal backward movement will generate a lateral component force on the inner wall of the oblique slot 209c1, and the lifting plate 209a cannot move horizontally under the vertical limitation of the support column 106, so the lateral component force is converted into a vertical downward driving force for the transmission plate 209c and the lifting plate 209a, the lifting plate 209a compresses the extension spring 209b and slides downward, at the same time, it drives the centering plate 209d to move downward synchronously. When the upper surface of the centering plate 209d is at the same horizontal plane as the upper surface of the positioning groove 102, the driving block 208 has just moved to the intersection of the oblique slot 209c1 and the straight slot 209c2, at this time, the driving block 208 continues to move backward and enters the straight slot 209c2, no longer generating a vertical driving force for the transmission plate 209c, so that the centering plate 209d remains at the same height as the positioning groove 102, avoiding its hindering the alignment and closing process of the subsequent sheet metal parts.

[0048] When the movable plate 202 continues to move back to the rear wall abutting the front wall of the two sheet metal parts, the second electric cylinder 206a can be closed. At this time, the two groups of sliding assemblies 204 on the rear wall of the movable plate 202 and the two groups of sliding assemblies 204 at the front end of the fixed plate 203 abut the surfaces of the two sheet metal parts from the front and back sides, respectively, the sliding belt 204c remains in a stable state under the support of the gear 204b and the rotating shaft 204a, which not only realizes the limiting and fixing of the sheet metal parts through the extrusion in the front and back directions, preventing them from shifting forward and backward during the horizontal alignment, but also ensures that the sheet metal parts can slide smoothly in the left and right directions by using the rotatable characteristics of the sliding belt 204c, reducing the resistance for the subsequent precise alignment.

[0049] Finally, the staff opens two first electric cylinders 103, which drive the first piston rods 104 to extend, and drive two clamping plates 105 to move horizontally along the positioning groove 102. The clamping plates 105 contact the left and right side walls of the two sheet metal pieces during the movement, and gradually push the two sheet metal pieces to align and close to the middle along the sliding band 204c, until the welding surfaces of the two sheet metal pieces completely fit and the positions are accurate. At this time, the clamping plates 105 continue to apply stable pressure to firmly clamp and fix the two sheet metal pieces, and the staff can then perform subsequent welding processing operations.

[0050] During the entire operation process, except for the initial placement of the sheet metal pieces, the remaining steps are automatically completed by the equipment, without the need for manual observation and adjustment of alignment by the staff. With the precise cooperation of various components, not only is the operation simple and convenient, but also high-precision alignment of the workpieces is achieved, greatly improving the positioning efficiency and welding quality, and effectively solving the problems of low efficiency and insufficient precision caused by the reliance on manual positioning of traditional equipment.

[0051] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various different exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages described in this application for which a range of equivalents can be allowed in the art. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be inverted or otherwise changed, and the nature or number of sub-elements or positions can be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed or re-sequenced without departing from the scope of the application. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the application. Accordingly, the present application is not limited to particular embodiments described, but extends to various modifications that nevertheless fall within the scope of the appended claims.

[0052] Furthermore, in order to provide a concise description of exemplary embodiments, all features of an actual implementation can not be described (i.e., those unrelated to the best mode of practicing the present application currently being considered, or those unrelated to enabling the present application).

[0053] It is to be understood that the development of the particular implementations described herein was motivated by the desire to solve real-world problems, and as such the claimed implementations can be susceptible to further implementation known to those of ordinary skill in the art. It is the intent of the claims that covers all such variations and modifications, many of which can be specific to a given integrated circuit chip design. The disclosure herein of any particular implementation described herein is purely illustrative, and does not limit the scope of the claims that cover all implementations consistent with the claims.

[0054] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A welding auxiliary positioning device for sheet metal part processing, characterized in that: The utility model relates to a positioning and clamping mechanism (100) and centering and limiting mechanism (200), which are used for positioning and clamping and centering and limiting of a workpiece. The positioning and clamping mechanism (100) comprises a clamping table (101), the upper surface of the clamping table (101) is provided with a positioning groove (102), first electric cylinders (103) are symmetrically arranged on the left and right sides outside the positioning groove (102), first piston rods (104) are movably connected inside the two first electric cylinders (103), clamping plates (105) are fixedly connected to the opposite sides of the two first piston rods (104) and extend into the positioning groove (102) through the left and right outer walls of the positioning groove (102), and a cavity (101a) is formed in the center of the inside of the clamping table (101). The centering and limiting mechanism (200) comprises a fixed frame (201) fixedly arranged at the bottom of the cavity (101a), an activity plate (202) slidably connected to the front end of the fixed frame (201), a fixed plate (203) fixedly arranged at the rear end of the fixed frame (201), and sliding assemblies (204) symmetrically arranged on the left and right sides of the top ends of the activity plate (202) and the fixed plate (203) and extending into the positioning groove (102), a receiving plate (205) slidably connected to the middle part of the fixed frame (201), a driving assembly (206) arranged at the bottom end of the fixed frame (201), the driving assembly (206) in transmission connection with the receiving plate (205) and the activity plate (202), vertical plates (207) symmetrically arranged on the left and right sides of the top end of the receiving plate (205), and a centering assembly (209) in transmission connection with the driving blocks (208) through the driving blocks (208) arranged on the opposite sides of the two vertical plates (207). A supporting column (106) is fixedly arranged at the top of the rear end of the cavity (101a), and a supporting plate (107) is fixedly connected to the bottom end of the supporting column (106). The centering assembly (209) comprises a lifting plate (209a) slidably sleeved outside the supporting column (106), the bottom end of the lifting plate (209a) is fixedly connected to the supporting plate (107) through a telescopic spring (209b), transmission plates (209c) are symmetrically arranged on the left and right sides of the top end of the lifting plate (209a), a centering plate (209d) is fixedly arranged at the rear side of the lifting plate (209a), and the top end of the centering plate (209d) penetrates through the cavity (101a) and extends into the positioning groove (102). The centering plate (209d) is vertically arranged with the fixed plate (203), the rear wall of the centering plate (209d) is attached to the front wall of the fixed plate (203), the centering plate (209d) is located in the middle of the fixed plate (203), and the left and right sides of the centering plate (209d) form a 90° angle with the left and right sides of the fixed plate (203), so that the straight-angle butt joint plate or the bent plate can be accurately centered. The front sides of the two transmission plates (209c) are provided with inclined grooves (209c1) with the front ends lower than the rear ends, and the rear ends of the inclined grooves (209c1) are connected to straight grooves (209c2), and the two driving blocks (208) are slidably connected to the lowest ends of the front ends of the inclined grooves (209c1).

2. The welding aid positioning apparatus for sheet metal fabrication of claim 1, wherein: The front side of the top end of the cavity (101a) is provided with an opening (101b), the upper part of the movable plate (202) is slidably connected in the opening (101b), the rear end of the opening (101b) is provided with a limiting groove (101c), the inside of the limiting groove (101c) is slidably connected with a limiting plate (210), and the front end of the limiting plate (210) is fixedly connected with a baffle (211), the front end of the baffle (211) extends into the opening (101b) and is fixedly connected with the rear wall of the movable plate (202), and the baffle (211) and the movable plate (202) jointly shield the opening (101b).

3. The welding aid positioning apparatus for sheet metal fabrication of claim 2, wherein: The driving assembly (206) comprises a second electric cylinder (206a) fixedly connected to the bottom of the fixed plate (203), and a second piston rod (206b) movably connected in the second electric cylinder (206a), and the front end of the second piston rod (206b) is fixedly connected with the bottom wall of the receiving plate (205).

4. The welding aid positioning apparatus for sheet metal fabrication of claim 3, wherein: The driving assembly (206) further comprises a rotating shaft (206c) rotatably connected to the center of the upper surface of the receiving plate (205), and the front and rear ends of the rotating shaft (206c) are both hingedly connected with the movable rods (206d), and the front side of the front movable rod (206d) is hingedly connected with the rear wall of the movable plate (202), and the rear side of the rear movable rod (206d) is hingedly connected with the front wall of the fixed plate (203).

5. The welding aid positioning apparatus for sheet metal fabrication of claim 4, wherein: The sliding assembly (204) comprises a plurality of rotating shafts (204a) rotatably connected to the front side of the fixed plate (203), and a plurality of gears (204b) are fixedly installed on the outer surfaces of the rotating shafts (204a), and a sliding belt (204c) is engagedly connected to the outer surfaces of the gears (204b).

6. The welding aid positioning apparatus for sheet metal fabrication of claim 5, wherein: The four groups of sliding assemblies (204) are composed of rotating shafts (204a), gears (204b) and sliding belts (204c), and the front two groups of sliding assemblies (204) are arranged on the rear side of the movable plate (202), and the rear two groups of sliding assemblies (204) are arranged on the front side of the fixed plate (203).

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