A fast switching positioning locking device for welding fixture and welding workstation

Abstract

The present invention discloses a fast switching positioning locking device and a welding workstation for a welding fixture, and belongs to the field of welding equipment. The fast switching positioning locking device of the present invention comprises a left positioning locking assembly and a right positioning locking assembly, and both the left and right positioning locking assemblies comprise a support seat, a flip seat, a positioning plate and a pneumatic locking pin, and a zero point positioning seat, a first correction positioning plate, a second correction positioning plate and a photoelectric sensor are provided on the side of the positioning plate away from the lateral locking cylinder; accordingly, the fixture assembly comprises a fixture bracket, a left positioning ear plate assembly and a right positioning ear plate assembly, and the positioning ear plate assembly comprises an ear plate vertical portion and an ear plate horizontal portion, and an ear plate locking hole is provided on the ear plate vertical portion, and a zero point rivet, a first positioning tooth plate and a second positioning tooth plate are provided on the lower side of the ear plate horizontal portion. The present invention greatly improves the clamping accuracy of the welding fixture, ensures the welding accuracy, and the clamping and replacement efficiency of the welding fixture is higher, and the electrical and pipeline connections can be quickly realized, and the operation is simple and convenient.

Description

Technical Field

[0001] The invention relates to welding equipment, and more particularly to a fast switching positioning locking device for a welding fixture and a welding workstation. Background Art

[0002] With the rapid development of intelligent manufacturing technology, the level of industrial production automation is getting higher and higher. In fields such as automobile production, the application of welding workstations is becoming more and more extensive, which plays an important role in reducing the labor intensity of manual welding and improving product welding accuracy and production efficiency.

[0003] Due to the complexity of the part structure, it is often necessary to adopt a split design and weld to form an integral part. In order to ensure the welding accuracy of the parts, each component of the part needs to be strictly and accurately positioned before welding, which often requires a special welding fixture to complete. In the actual welding production process, different parts require welding fixtures with different structures, so it is necessary to replace the corresponding welding fixtures in the welding workstation for different parts. The clamping accuracy of the welding fixture directly affects the positioning accuracy of the parts, thereby affecting the welding accuracy of the product, so it is necessary to ensure the clamping accuracy of the welding fixture on the welding workstation. At the same time, since the structure of the welding fixture itself is relatively complex and there are many pneumatic clamping mechanisms on it, when replacing the welding fixture, not only precise positioning is required, but also complex pipeline and line connections are required, which makes the clamping efficiency of the welding fixture low and affects the welding production progress.

[0004] In response to the above-mentioned technical problems, relevant solutions have also been disclosed in the prior art, such as the "A quick-change automotive component flip welding table structure" disclosed in Chinese Patent No. ZL202121699083.X (authorization announcement date is April 12, 2022), which includes a main frame structure and a quick-change fixture structure arranged on the main frame structure. The quick-change fixture structure includes a fixed fixture table structure connected to one of the side end connecting table structures, a fixture connecting frame structure connected to the lower part of the fixed fixture table structure, and a mobile fixture table structure connected to the other side end connecting table structure and arranged on the connecting frame structure. For example, the “A quick-change base for tooling fixtures of a welding workstation” disclosed in Chinese patent No. ZL202322561971.0 (authorization announcement date is July 26, 2024) includes: two groups of parallel arranged X-axis seat arms, connected by a Y-axis connecting body, and two groups of locating pins are arranged on each group of X-axis seat arms; the two groups of locating pins of the same group of seat arms are connected by a connecting rod; a driving cylinder, a group of driving cylinders is arranged on each group of X-axis seat arms, and the driving cylinder is used to drive a group of locating pins on the X-axis seat arms to move along the X-direction; and a group of fixture limit blocks are arranged at the connection between each group of X-axis seat arms and the Y-axis connecting body. Another example is the "Multi-angle Pneumatic Axial Flip Platform for Automobile Welding" disclosed in Chinese Patent Application No. 202010735278.9 (the application publication date is October 9, 2020), which includes a bracket and an axial flip limit mechanism arranged above the bracket for positioning and flipping the automobile sheet metal assembly, the axial flip limit mechanism is composed of an active flip limit mechanism and a driven flip limit mechanism, and the active flip limit mechanism and the driven flip limit mechanism are installed at the upper ends of the two ends of the bracket facing each other; the active flip limit mechanism includes an active flip plate, a strip limit plate, a limit block at a 0° angle position, a pressure monitoring assembly at a 0° angle position, an oblique limit cylinder, a telescopic assembly and its transmission assembly, and the driven flip limit mechanism includes a driven flip plate, a limit slot group and its lateral telescopic limit assembly.

[0005] The above patent application solves the problem of rapid clamping and positioning of welding fixtures to a certain extent. However, due to the manufacturing accuracy errors of different welding fixtures, it is easy to cause positioning errors and make it difficult to clamp the welding fixture. Conventional pin positioning and limit block positioning can only achieve rough positioning. When replacing different fixtures, it is easy to produce clamping positioning errors, resulting in poor clamping positioning accuracy and affecting the final welding quality. In addition, most of the existing technologies ignore the problem of cumbersome pipeline connection operations of welding fixtures, which makes it difficult to quickly complete the replacement clamping and pipeline connection of welding fixtures, reducing the replacement efficiency of welding fixtures. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art such as low replacement efficiency and poor clamping accuracy of welding fixtures, and to provide a quick-switching positioning and locking device for welding fixtures and a welding workstation. The technical scheme of the present invention is adopted to position and lock the welding fixture on two different surfaces, and the zero-point positioning fixture and the two-way correction positioning plate on the left and right positioning plates are used to realize the precise positioning and correction of the left and right positioning ear plates of the fixture, thereby ensuring the repeated positioning accuracy of replacing different welding fixtures; at the same time, a photoelectric sensor is used to detect the installation status of the welding fixture, and the upper and lower pipeline connection components are used to realize the quick connection of the pipeline after the welding fixture is locked, and the pneumatic aviation plug locking component is used to realize the quick connection of the electrical circuit of the welding fixture, without the need for cumbersome and complicated electrical and pipeline connection operations, which not only greatly improves the clamping accuracy of the welding fixture and ensures the welding accuracy, but also the clamping and replacement efficiency of the welding fixture is higher, and the electrical and pipeline connections can be quickly realized, and the operation is simple and convenient.

[0008] 2. Technical solution

[0009] In order to achieve the above object, the technical solution provided by the present invention is:

[0010] A fast-switching positioning and locking device for a welding fixture of the present invention comprises a left positioning and locking assembly and a right positioning and locking assembly which are relatively arranged on a welding workbench, wherein a welding station for installing a fixture assembly is formed between the left positioning and locking assembly and the right positioning and locking assembly;

[0011] The left positioning and locking assembly includes a left supporting seat mounted on the welding workbench, a left flipping seat rotatably mounted on the left supporting seat, a left positioning plate vertically fixed on the left flipping seat, and a left pneumatic locking pin mounted on the lower part of the left positioning plate. The left positioning plate is provided with a left zero-point positioning seat, a left first correction positioning plate, a left second correction positioning plate and a left photoelectric sensor on a side facing away from the left pneumatic locking pin.

[0012] The right positioning and locking assembly includes a right supporting seat mounted on the welding workbench, a right flipping seat rotatably mounted on the right supporting seat, a right positioning plate vertically fixed on the right flipping seat, and a right pneumatic locking pin mounted on the lower part of the right positioning plate, and a right zero point positioning seat, a right first correction positioning plate, a right second correction positioning plate and a right photoelectric sensor are provided on a side of the right positioning plate away from the right pneumatic locking pin;

[0013] The correction direction of at least one of the four positioning plates, namely, the first correction positioning plate on the left side, the second correction positioning plate on the left side, the first correction positioning plate on the right side and the second correction positioning plate on the right side, is perpendicular to the correction directions of the other positioning plates; the left positioning plate and / or the right positioning plate are also provided with a pneumatic aviation plug locking assembly and a lower pipe connection assembly; the left support seat or the right support seat is also provided with a flip motor for driving the flip seat on the corresponding side to perform a flip movement;

[0014] The clamp assembly includes a clamp bracket, a left positioning ear plate assembly and a right positioning ear plate assembly arranged at the left and right ends of the clamp bracket, and a plurality of clamping cylinders arranged on the clamp bracket; wherein,

[0015] The left positioning ear plate assembly comprises a left ear plate vertical portion and a left ear plate horizontal portion arranged on the upper part of the left ear plate vertical portion, the left ear plate vertical portion is provided with a left ear plate locking hole matched with the above-mentioned left pneumatic locking pin, and the lower side surface of the left ear plate horizontal portion is respectively provided with a left zero point pull nail matched with the above-mentioned left zero point positioning seat, a left first positioning tooth plate matched with the above-mentioned left first correction positioning plate, and a left second positioning tooth plate matched with the above-mentioned left second correction positioning plate;

[0016] The right positioning ear plate assembly comprises a right ear plate vertical portion and a right ear plate horizontal portion arranged on the upper part of the right ear plate vertical portion, the right ear plate vertical portion is provided with a right ear plate locking hole matched with the above-mentioned right pneumatic locking pin, and the lower side surface of the right ear plate horizontal portion is respectively provided with a right zero point pull nail matched with the above-mentioned right zero point positioning seat, a right first positioning tooth plate matched with the above-mentioned right first correction positioning plate, and a right second positioning tooth plate matched with the above-mentioned right second correction positioning plate;

[0017] The left positioning ear plate assembly and / or the right positioning ear plate assembly are also provided with an upper aviation plug docking assembly corresponding to the above-mentioned pneumatic aviation plug locking assembly, and an upper pipeline connection assembly corresponding to the above-mentioned lower pipeline connection assembly; after the clamp assembly is positioned and locked on the left positioning locking assembly and the right positioning locking assembly on the corresponding side, the pneumatic aviation plug locking assembly is docked with the upper aviation plug docking assembly to achieve electrical connection, and the lower pipeline connection assembly is docked with the upper pipeline connection assembly to achieve pipeline connection.

[0018] Furthermore, the pneumatic aviation plug locking assembly includes an aviation plug cylinder and a lower aviation plug locking block, the lower aviation plug locking block is installed on the driving end of the aviation plug cylinder, and the upper aviation plug docking assembly includes an upper aviation plug module opposite to the lower aviation plug locking block, and the aviation plug cylinder drives the lower aviation plug locking block to dock and lock with the upper aviation plug module according to the detection signals of the left photoelectric sensor and / or the right photoelectric sensor to achieve quick electrical connection.

[0019] Furthermore, the lower pipe connection assembly includes a left lower pipe connection seat arranged on one side of the left positioning plate and / or a right lower pipe connection seat arranged on one side of the right positioning plate, the left lower pipe connection seat is provided with a left pipe socket consistent with the plug-in direction of the left zero-point positioning seat, and the right lower pipe connection seat is provided with a right pipe socket consistent with the plug-in direction of the right zero-point positioning seat; the upper pipe connection assembly includes a left upper pipe connection seat arranged on one side of the horizontal part of the left ear plate and / or a right upper pipe connection seat arranged on one side of the horizontal part of the right ear plate, the lower side surface of the left upper pipe connection seat is provided with a left pipe plug matching with the left pipe socket, and the lower side surface of the right upper pipe connection seat is provided with a right pipe plug matching with the right pipe socket.

[0020] Furthermore, the left flip seat is provided with a left seat plate positioning groove, the left positioning plate is positioned and installed in the left seat plate positioning groove of the left flip seat through the left mounting plate, the left flip seat is also provided with a left rough positioning guide block perpendicular to the left positioning plate, and the outer side of the horizontal part of the left ear plate is provided with a left ear plate slot adapted to the left rough positioning guide block;

[0021] The right flip seat is provided with a right seat plate positioning groove, and the right positioning plate is positioned and installed in the right seat plate positioning groove of the right flip seat through the right mounting plate. The right flip seat is also provided with a right coarse positioning guide block perpendicular to the right positioning plate, and the outer side of the horizontal part of the right ear plate is provided with a right ear plate slot adapted to the right coarse positioning guide block.

[0022] Furthermore, one of the left support seat and the right support seat is provided with a flip locking cylinder, and the other is provided with a positioning locking pin. The left flip seat and the right flip seat are correspondingly provided with circumferentially distributed flip positioning holes, and the locking pin and the positioning locking pin of the flip locking cylinder respectively cooperate with the corresponding flip positioning holes. The flip locking cylinder and the positioning locking pin are used to position and lock the left flip seat and the right flip seat when replacing the fixture assembly.

[0023] Furthermore, the positioning locking pin is also provided with a sensor for detecting its current state, so as to control whether the welding work is started according to the position of the positioning locking pin.

[0024] Furthermore, the left-side zero-point positioning seat is located between the left-side first correction positioning plate and the left-side second correction positioning plate, and the left-side first correction positioning plate and the left-side second correction positioning plate are rack plates with correction directions perpendicular to each other, which are respectively used to guide and limit the welding fixture in the X-direction and Y-direction; the right-side zero-point positioning seat is located between the right-side first correction positioning plate and the right-side second correction positioning plate, and the right-side first correction positioning plate and the right-side second correction positioning plate are rack plates with consistent correction directions, which are used to guide and limit the welding fixture in the X-direction.

[0025] Furthermore, the left support seat is fixed on the welding workbench through the left connecting seat, and the right support seat is fixed on the welding workbench through the right connecting seat; the welding workbench is installed on a rotating base.

[0026] A welding workstation of the present invention comprises a welding robot and the above-mentioned rapid switching positioning and locking device of the welding fixture, wherein the welding robot is installed on a welding workbench.

[0027] Furthermore, a pair of left positioning locking assemblies and a right positioning locking assembly are respectively provided on both sides of the welding workbench, forming a first welding station and a second welding station on both sides of the welding workbench, and two welding robots are correspondingly provided on the welding workbench.

[0028] 3. Beneficial effects

[0029] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0030] (1) A quick-switching positioning and locking device for a welding fixture of the present invention comprises a left positioning and locking assembly and a right positioning and locking assembly which are relatively arranged on a welding workbench, and a welding station for installing a fixture assembly is formed between the left positioning and locking assemblies; the left and right positioning and locking assemblies each comprise a support seat installed on the welding workbench, a flip seat rotatably installed on the support seat, a positioning plate vertically fixed on the flip seat, and a pneumatic locking pin installed at the lower part of the positioning plate, and a zero-point positioning seat, a first correction positioning plate, a second correction positioning plate and a photoelectric sensor are provided on a side of the positioning plate away from the lateral locking cylinder; a pneumatic aviation plug locking component and a Lower pipeline connecting assembly; accordingly, the clamp assembly includes a clamp bracket, a left positioning ear plate assembly and a right positioning ear plate assembly arranged at the left and right ends of the clamp bracket, and a plurality of clamping cylinders arranged on the clamp bracket, the positioning ear plate assembly includes an ear plate vertical portion and an ear plate horizontal portion arranged on the upper part of the ear plate vertical portion, the ear plate vertical portion has an ear plate locking hole matched with a pneumatic locking pin, and the lower side surface of the ear plate horizontal portion is respectively provided with a zero point pull nail matched with a zero point positioning seat, a first positioning tooth plate matched with the above-mentioned first correction positioning plate, and a second positioning tooth plate matched with the above-mentioned second correction positioning plate; the left positioning ear plate assembly and / or the right positioning ear plate assembly are also provided with an upper An aerial plug docking assembly, and an upper pipe connection assembly corresponding to the above-mentioned lower pipe connection assembly; the quick-switching positioning and locking device positions and locks the welding fixture on two different surfaces, and uses the zero-point positioning fixture and the two-way correction positioning plate on the left and right side positioning plates to achieve precise positioning and correction of the left and right positioning ear plates of the fixture, thereby ensuring the repeated positioning accuracy of replacing different welding fixtures; at the same time, a photoelectric sensor is used to detect the installation status of the welding fixture, and the upper and lower pipe connection assemblies are used to achieve quick connection of the pipeline after the welding fixture is locked, and the pneumatic aerial plug locking assembly is used to achieve quick connection of the electrical circuit of the welding fixture, without the need for cumbersome and complicated electrical and pipeline connection operations, which not only greatly improves the clamping of the welding fixture The precision is improved, which ensures the welding precision, and the clamping and replacement efficiency of the welding fixture is higher, the electrical and pipeline connections can be quickly realized, the operation is simple and convenient, and it can be adapted to different welding fixtures, thereby improving the adaptability and versatility of the fixture; in addition, since the correction direction of at least one of the four positioning plates, namely the first correction positioning plate on the left, the second correction positioning plate on the left, the first correction positioning plate on the right, and the second correction positioning plate on the right, is perpendicular to the correction direction of the other positioning plates, the welding fixture can be quickly and accurately positioned in two directions, and the locking and positioning of the zero-point positioning fixture and the pneumatic locking pin are coordinated, so that the welding fixture can be firmly fixed and accurately positioned, thereby overcoming the problem of low repeated clamping precision in the prior art.

[0031] (2) A quick switching positioning and locking device for a welding fixture of the present invention, wherein the pneumatic aviation plug locking assembly comprises an aviation plug cylinder and a lower aviation plug locking block, wherein the lower aviation plug locking block is mounted on the driving end of the aviation plug cylinder, and the upper aviation plug docking assembly comprises an upper aviation plug module opposite to the lower aviation plug locking block, wherein the aviation plug cylinder drives the lower aviation plug locking block to dock and lock with the upper aviation plug module according to the detection signal of the left photoelectric sensor and / or the right photoelectric sensor to realize quick electrical connection; the upper and lower pipeline connection assemblies can realize quick and stable plug-in connection of the air pipeline by plugging the pipeline plug into the pipeline jack; the above-mentioned design can ensure the quick and stable plug-in of the aviation plug and the air pipeline, and ensure the connection reliability and stability; when replacing the welding fixture, the pipeline connection can also be quickly disconnected without complicated pipeline disassembly and assembly work, and the replacement time of the welding fixture is compressed from the original more than 20 minutes to about 2 minutes. While ensuring the clamping and positioning accuracy, the replacement efficiency of the welding fixture can be increased by more than 10 times.

[0032] (3) The quick-switching positioning and locking device of a welding fixture of the present invention comprises a seat plate positioning groove on the flip seat, the positioning plate is positioned and installed in the seat plate positioning groove of the flip seat through the mounting plate, the flip seat is also provided with a coarse positioning guide block perpendicular to the positioning plate, the outer side of the horizontal portion of the ear plate is provided with an ear plate slot matched with the coarse positioning guide block, the seat plate positioning groove of the flip seat is utilized to ensure the installation accuracy and firmness of the positioning plate, and the high precision of the quick-switching positioning and locking device itself can be ensured; the guiding cooperation of the coarse positioning guide block and the ear plate slot allows the welding fixture to be quickly aligned during installation, so that the zero-point positioning fixture and each positioning pin and the correction positioning plate can be quickly and accurately aligned, further ensuring the convenience and accuracy of the clamping operation of the welding fixture.

[0033] (4) A quick-switching positioning and locking device for a welding fixture of the present invention, wherein a flip locking cylinder is provided on one of the left support seat and the right support seat, and a positioning locking pin is provided on the other. The left flip seat and the right flip seat are correspondingly provided with circumferentially distributed flip positioning holes, and the locking pin and the positioning locking pin of the flip locking cylinder respectively cooperate with the corresponding flip positioning holes. The flip locking cylinder and the positioning locking pin are used to position and lock the left flip seat and the right flip seat when replacing the fixture assembly. The flip locking cylinder and the positioning locking pin can be used to position and fix the flip seat, thereby ensuring the safety of replacing the welding fixture; and the flip locking cylinder and the positioning locking pin are used to cooperate, so that the flip locking cylinder can move quickly to achieve rapid locking or unlocking of the flip seat, and the positioning locking pin needs to be manually unlocked to remind manual inspection, thereby further ensuring the safety of replacing the welding fixture and the reliability of clamping.

[0034] (5) The quick-switching positioning locking device of a welding fixture of the present invention is also provided with a sensor for detecting its current state on the positioning locking pin, which is used to control whether the welding work is started according to the position of the positioning locking pin. This can effectively avoid equipment failure or safety hazards caused by the operator forgetting to operate the positioning locking pin, and encourage the operator to strictly follow the safety operation specifications.

[0035] (6) A quick-switching positioning and locking device for a welding fixture of the present invention, wherein the left zero-point positioning seat is located between the left first correction positioning plate and the left second correction positioning plate, the left first correction positioning plate and the left second correction positioning plate are rack plates with correction directions perpendicular to each other, and are used to guide and limit the welding fixture in the X direction and the Y direction, respectively; the right zero-point positioning seat is located between the right first correction positioning plate and the right second correction positioning plate, the right first correction positioning plate and the right second correction positioning plate are rack plates with the same correction direction, and are used to guide and limit the welding fixture in the X direction, and the mutual engagement of the rack plates can achieve precise positioning, and can ensure the stability of the installation, and avoid the welding fixture from loosening during welding or flipping; at the same time, the rack plates with two perpendicular directions can simultaneously achieve precise positioning in the X direction and the Y direction, ensuring that the fixture has higher clamping accuracy.

[0036] (7) The present invention provides a quick-switching positioning and locking device for a welding fixture, wherein the left support seat is fixed to the welding workbench via the left connecting seat, and the right support seat is fixed to the welding workbench via the right connecting seat; the welding workbench is installed on a rotating base; the connecting seat is used to realize the connection between the support seat and the welding workbench, the structure has high strength, and the connection is stable and reliable; and the welding workbench can be rotated as a whole, and the welding position can be flexibly switched, and high-precision welding of complex parts can be flexibly realized in conjunction with welding equipment.

[0037] (8) A welding workstation of the present invention has a pair of left positioning locking assemblies and a right positioning locking assembly respectively disposed on both sides of the welding workbench, forming a first welding station and a second welding station on both sides of the welding workbench. Two welding robots are correspondingly disposed on the welding workbench, which can realize dual-station synchronous welding and greatly improve the efficiency of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of a quick-switching positioning and locking device for a welding fixture of the present invention;

[0039] Figure 2 It is a three-dimensional structural schematic diagram of the left positioning and locking assembly in the rapid switching positioning and locking device of the present invention;

[0040] Figure 3It is a schematic diagram of the positioning and locking structure of the left positioning and locking assembly in the fast switching positioning and locking device of the present invention;

[0041] Figure 4 It is a three-dimensional structural schematic diagram of the right positioning and locking assembly in the fast switching positioning and locking device of the present invention;

[0042] Figure 5 It is a schematic diagram of the positioning and locking structure of the right positioning and locking assembly in the fast switching positioning and locking device of the present invention;

[0043] Figure 6 It is a three-dimensional structural schematic diagram of the clamp assembly in the quick-switching positioning and locking device of the present invention;

[0044] Figure 7 It is a schematic diagram of the matching structure of the left positioning ear plate component and the left positioning locking assembly in the present invention;

[0045] Figure 8 It is a schematic diagram of the matching structure of the right positioning ear plate component and the right positioning locking assembly in the present invention;

[0046] Fig. 9 It is a schematic diagram of the installation structure of the clamp assembly on the left and right positioning and locking assemblies in the present invention;

[0047] Fig.10 It is a structural schematic diagram of the left positioning ear plate assembly installed on the left positioning locking assembly in the present invention;

[0048] Fig.11 It is a structural schematic diagram of the right positioning ear plate assembly in the present invention being installed on the right positioning locking assembly;

[0049] Fig.12 It is a schematic diagram of the overall structure of a welding workstation of the present invention;

[0050] Fig.13 It is a three-dimensional structural schematic diagram of a fixture assembly installed with parts to be welded in the present invention;

[0051] Fig.14 It is a schematic diagram of the installation state of the clamp assembly on the welding workstation in the present invention.

[0052] Explanation of the symbols in the schematic diagram:

[0053] 100, left positioning and locking assembly; 101, left supporting seat; 102, left connecting seat; 103, left flip seat; 103-1, left seat plate positioning groove; 104, flip locking cylinder; 104-1, locking pin; 105, left mounting plate; 106, left positioning plate; 107, left zero-point positioning seat; 108, left first correction positioning plate; 109, left second correction positioning plate; 110, left locking seat plate; 111, left pneumatic locking pin; 111-1, left locking pin guide seat; 112, left coarse positioning guide block; 113, left lower pipeline connecting seat; 113-1, left pipeline jack; 114, left photoelectric sensor; 115, air plug cylinder; 116, lower air plug locking block;

[0054] 200, right positioning and locking assembly; 201, right supporting seat; 202, right connecting seat; 203, right flip seat; 203-1, right seat plate positioning groove; 204, positioning and locking pin; 205, right mounting plate; 206, right positioning plate; 207, right zero-point positioning seat; 208, right first correction positioning plate; 209, right second correction positioning plate; 210, right locking seat plate; 211, right pneumatic locking pin; 211-1, right locking pin guide seat; 212, right rough positioning guide block; 213, right lower pipe connecting seat; 213-1, right pipeline jack; 214, right photoelectric sensor; 215, flip motor;

[0055] 300. Welding workbench;

[0056] 400, fixture assembly; 41, fixture bracket; 42, left positioning ear plate assembly; 421, left ear plate vertical part; 421-1, left ear plate locking hole; 422, left ear plate horizontal part; 422-1, left ear plate slot; 423, left zero point rivet; 424, left first positioning tooth plate; 425, left second positioning tooth plate; 426, left upper pipe connection seat; 426-1, left pipe plug; 427, upper Aviation plug module; 427-1, guide column; 43, right positioning ear plate assembly; 431, right ear plate vertical part; 431-1, right ear plate locking hole; 432, right ear plate horizontal part; 432-1, right ear plate slot; 433, right zero point rivet; 434, right first positioning tooth plate; 435, right second positioning tooth plate; 436, right upper pipeline connection seat; 436-1, right pipeline plug; 44, clamping cylinder;

[0057] 500. Rotating base; 600. Welding robot; 700. Parts to be welded; A. First welding station; B. Second welding station. DETAILED DESCRIPTION

[0058] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0059] [Example]

[0060] Combination Figure 1 As shown, a quick-switching positioning and locking device for a welding fixture of the present embodiment includes a left positioning and locking assembly 100 and a right positioning and locking assembly 200 which are relatively arranged on a welding workbench 300, and a welding station for installing a fixture assembly 400 is formed between the left positioning and locking assembly 100 and the right positioning and locking assembly 200. The left positioning and locking assembly 100 is used to position and lock the left side of the fixture assembly 400, and the right positioning and locking assembly 200 is used to position and lock the right side of the fixture assembly 400, thereby realizing large-span clamping of the fixture assembly 400 and ensuring sufficient welding space.

[0061] Figure 2 and Figure 3 The structure of the left positioning locking assembly 100 is shown. Figure 4 and Figure 5 The structure of the right positioning locking assembly 200 is shown. Figure 2 and Figure 3 As shown, the left positioning and locking assembly 100 comprises a left support seat 101 mounted on the welding workbench 300, a left flip seat 103 rotatably mounted on the left support seat 101, a left positioning plate 106 vertically fixed on the left flip seat 103, and a left pneumatic locking pin 111 mounted on the lower part of the left positioning plate 106. The left positioning plate 106 is provided with a left zero point positioning seat 107, a left first correction positioning plate 108, a left second correction positioning plate 109 and a left photoelectric sensor 114 on one side away from the left pneumatic locking pin 111. Figure 4 and Figure 5As shown, similar to the structure of the above-mentioned left positioning and locking assembly 100, the above-mentioned right positioning and locking assembly 200 includes a right side support seat 201 installed on the welding workbench 300, a right side flip seat 203 rotatably installed on the right side support seat 201, a right side positioning plate 206 vertically fixed on the right side flip seat 203, and a right side pneumatic locking pin 211 installed at the lower part of the right side positioning plate 206, and the right side positioning plate 206 is provided with a right side zero point positioning seat 207, a right side first correction positioning plate 208, a right side second correction positioning plate 209 and a right side photoelectric sensor 214 on the side away from the right side pneumatic locking pin 211. The left positioning and locking assembly 100 and the right positioning and locking assembly 200 are opposite in direction, and the clamp assembly 400 can be placed on the left positioning and locking assembly 100 and the right positioning and locking assembly 200 for locking and fixing. Among them, the correction direction of at least one of the above-mentioned first correction positioning plate 108 on the left, the second correction positioning plate 109 on the left, the first correction positioning plate 208 on the right and the second correction positioning plate 209 is perpendicular to the correction directions of the other positioning plates. Therefore, the welding fixture 400 can be quickly and accurately positioned in two directions. Combined with the locking and positioning of the zero-point positioning fixture and the pneumatic locking pin, the welding fixture can be firmly fixed and accurately positioned, overcoming the problem of low repeated clamping accuracy in the prior art. In addition, a pneumatic aviation plug locking assembly and a lower pipeline connection assembly are also provided on the left positioning plate 106 and / or the right positioning plate 206 to realize the electrical and pipeline connection on the welding fixture 400; a flip motor 215 is also provided on the left support seat 101 or the right support seat 201 to drive the flip seat on the corresponding side to flip, so that the clamp assembly 400 clamped between the left positioning locking assembly 100 and the right positioning locking assembly 200 can flip axially to change the welding angle and ensure the flexibility and high precision of welding. The side with the flip motor 215 can be called the active flip locking seat, and the other side can be called the driven flip locking seat. When the active flip locking seat flips, it can drive the driven flip locking seat to follow the flip movement through the clamp assembly 400.

[0062] Correspondingly, the clamp assembly 400 has a structure that matches the above-mentioned left and right positioning and locking assemblies. Figure 6 The overall structure of the fixture assembly 400 is shown, and the fixture assembly 400 includes a fixture bracket 41, a left positioning ear plate assembly 42 and a right positioning ear plate assembly 43 arranged at the left and right ends of the fixture bracket 41, and a plurality of clamping cylinders 44 (such as Fig.13As shown in the figure, the clamp bracket 41 is generally a frame structure, and the left positioning ear plate assembly 42 and the right positioning ear plate assembly 43 are both roughly inverted "L"-shaped structures. The left positioning ear plate assembly 42 is provided with a positioning and locking structure compatible with the above-mentioned left positioning and locking assembly 100, and the right positioning ear plate assembly 43 is provided with a positioning and locking structure compatible with the above-mentioned right positioning and locking assembly 200. Figure 7 The left positioning ear plate assembly 42 is shown to cooperate with the left positioning locking assembly 100. The left positioning ear plate assembly 42 includes a left ear plate vertical portion 421 and a left ear plate horizontal portion 422 arranged on the upper part of the left ear plate vertical portion 421. The left ear plate vertical portion 421 and the left ear plate horizontal portion 422 can form an integrated "L"-shaped angle plate. The left ear plate vertical portion 421 has a left ear plate locking hole 421-1 that cooperates with the above-mentioned left pneumatic locking pin 111. The left pneumatic locking pin 111 is provided on the left ear plate vertical portion 421. The locking pins 111 are provided with two groups, which can be installed on the left locking seat plate 110 through the left locking pin guide seat 111-1. The left locking seat plate 110 is fixed to the lower part of the left positioning plate 106. The left pneumatic locking pin 111 can pass through the through hole on the left locking seat plate 110. Two left ear plate locking holes 421-1 are correspondingly provided on the left ear plate vertical portion 421. The diameter of the left ear plate locking hole 421-1 is equal to or slightly larger than the diameter of the left pneumatic locking pin 111. The butt joint ends of the locking hole and the latch pin are provided with corresponding chamfered structures, so that the left pneumatic locking pin 111 can be accurately inserted into the corresponding left ear plate locking hole 421-1 for locking; the lower side surface of the left ear plate horizontal portion 422 is respectively provided with a left zero point rivet 423 that cooperates with the above-mentioned left zero point positioning seat 107, a left first positioning tooth plate 424 that cooperates with the above-mentioned left first correction positioning plate 108, and a left second positioning tooth plate 425 that cooperates with the above-mentioned left second correction positioning plate 109; the height of the left zero point rivet 423 is greater than the left first positioning tooth plate 424 and the left second positioning tooth plate 425, so that the left zero point rivet 423 and the left zero point positioning seat 107 are preferentially connected before the positioning tooth plate and the corresponding correction positioning plate are connected, so that the left zero point rivet 423 can be used for preliminary positioning, so that the positioning tooth plate and the corresponding correction positioning plate can be preliminarily aligned, and then the positioning tooth plate and the corresponding correction positioning plate can be used for precise positioning. The lower end of the left zero-point pull pin 423 can be designed to be conical, so as to facilitate the accurate introduction of the left zero-point pull pin 423 and the left zero-point positioning seat 107. The first positioning tooth plate 424 on the left and the second positioning tooth plate 425 on the left have trapezoidal or triangular tooth profiles, and the first correction positioning plate 108 on the left and the second correction positioning plate 109 on the left also have corresponding trapezoidal or triangular tooth profiles. When the positioning tooth plate cooperates with the corresponding correction positioning plate, the tooth-shaped inclined surface can be used for bite positioning, thereby ensuring the positioning accuracy of the positioning tooth plate and the corresponding correction positioning plate.

[0063] Figure 8The figure shows the matching structure of the right positioning ear plate assembly 43 and the right positioning locking assembly 200. Similar to the structure of the left positioning ear plate assembly 42, the right positioning ear plate assembly 43 includes a right ear plate vertical portion 431 and a right ear plate horizontal portion 432 arranged on the upper part of the right ear plate vertical portion 431. The right ear plate vertical portion 431 and the right ear plate horizontal portion 432 form an integrated "L"-shaped angle plate. The right ear plate vertical portion 431 is provided with a right ear plate locking hole 431-1 matching with the above-mentioned right pneumatic locking pin 211. The right pneumatic locking pin 211 is provided with two groups, The right locking pin guide seat 211-1 can be installed on the right locking seat plate 210, and the right locking seat plate 210 is fixed to the lower part of the right positioning plate 206. The right pneumatic locking pin 211 can pass through the through hole on the right locking seat plate 210. Two right ear plate locking holes 431-1 are correspondingly arranged on the right ear plate vertical portion 431. The diameter of the right ear plate locking hole 431-1 is equal to or slightly larger than the diameter of the right pneumatic locking pin 211. The docking end is provided with a corresponding chamfered structure to facilitate the right pneumatic locking pin 211 to be accurately inserted into the corresponding right ear plate locking hole 431-1 for locking; the lower side surface of the right ear plate horizontal part 432 is respectively provided with a right zero point rivet 433 that cooperates with the above-mentioned right zero point positioning seat 207, the right first positioning tooth plate 434 that cooperates with the above-mentioned right first correction positioning plate 208, and the right second positioning tooth plate 435 that cooperates with the above-mentioned right second correction positioning plate 209; the height of the right zero point rivet 433 is greater than the right first positioning tooth plate 434 and the right second positioning tooth plate 435, so that the docking of the right zero point rivet 433 with the right zero point positioning seat 207 takes precedence over the docking of the positioning tooth plate with the corresponding correction positioning plate, so that the right zero point rivet 433 can be used for preliminary positioning, so that the positioning tooth plate and the corresponding correction positioning plate can be preliminarily aligned, and then the positioning tooth plate and the corresponding correction positioning plate can be used for precise positioning. The lower end of the right zero-point pull pin 433 can be designed to be conical, so as to facilitate the accurate introduction of the right zero-point pull pin 433 into the right zero-point positioning seat 207. The right first positioning tooth plate 434 and the right second positioning tooth plate 435 both have trapezoidal or triangular tooth profiles, and the right first correction positioning plate 208 and the right second correction positioning plate 209 also have corresponding trapezoidal or triangular tooth profiles. When the positioning tooth plate cooperates with the corresponding correction positioning plate, the tooth-shaped inclined surface can be used for bite positioning, thereby ensuring the positioning accuracy of the positioning tooth plate and the corresponding correction positioning plate.

[0064] The above-mentioned zero-point positioning seat and the corresponding zero-point pull nail form a zero-point positioning fixture. The specific structure of the zero-point positioning fixture is similar to the prior art. The zero-point positioning seat adopts a pneumatic clamping structure, which has a locking steel ball inside, which can lock the zero-point pull nail, ensuring high precision of repeated positioning. In this embodiment, the zero-point positioning seat also has a locking action feedback circuit. When the above-mentioned photoelectric sensors 114 and 214 detect the welding fixture, the pneumatic actuator of the zero-point positioning seat is activated to lock the zero-point pull nail. At the same time, the locking action feedback circuit sends a signal to control the pneumatic locking pins 111 and 211 on both sides to extend and lock the welding fixture.

[0065] The quick-switching positioning and locking device positions and locks the welding fixture on two different surfaces, and utilizes the zero-point positioning fixture and the two-way correction positioning plate on the left and right side positioning plates to achieve precise positioning and correction of the left and right positioning ear plates of the fixture, thereby ensuring the repeated positioning accuracy when replacing different welding fixtures. It can adapt to different welding fixtures, and improves the adaptability and versatility of the fixture. In addition, an upper aviation plug docking assembly corresponding to the above-mentioned pneumatic aviation plug locking assembly and an upper pipeline connection assembly corresponding to the above-mentioned lower pipeline connection assembly are also provided on the left positioning ear plate assembly 42 and / or the right positioning ear plate assembly 43; after the clamp assembly 400 is positioned and locked on the left positioning locking assembly 100 and the right positioning locking assembly 200 on the corresponding side, the pneumatic aviation plug locking assembly is docked with the upper aviation plug docking assembly to achieve electrical connection, and the lower pipeline connection assembly is docked with the upper pipeline connection assembly to achieve pipeline connection, that is: after the welding fixture 400 is installed in place, the pneumatic aviation plug locking assembly can be docked with the upper aviation plug docking assembly, and the lower pipeline connection assembly is docked with the upper pipeline connection assembly synchronously to achieve electrical and pipeline connection in the welding fixture. Compared with the prior art, there is no need for cumbersome and complicated electrical and pipeline connection operations, which not only greatly improves the clamping accuracy of the welding fixture and ensures the welding accuracy, but also the clamping and replacement efficiency of the welding fixture is higher, and the operation is simple and convenient.

[0066] Reference Figure 2 , Figure 3 and Figure 7As shown, in this embodiment, the above-mentioned pneumatic aviation plug locking assembly includes an aviation plug cylinder 115 and a lower aviation plug locking block 116, and the lower aviation plug locking block 116 is installed on the driving end of the aviation plug cylinder 115, and the aviation plug cylinder 115 drives the lower aviation plug locking block 116 to move up and down; the upper aviation plug docking assembly includes an upper aviation plug module 427 opposite to the lower aviation plug locking block 116, and both the lower aviation plug locking block 116 and the upper aviation plug module 427 have aviation electrical plugs. The aviation plug cylinder 115 can drive the lower aviation plug locking block 116 to dock and lock with the upper aviation plug module 427 according to the detection signal of the left photoelectric sensor 114 and / or the right photoelectric sensor 214 to achieve a quick electrical connection. The pneumatic drive design of the aviation plug cylinder 115 is adopted, and the action response is fast, which can ensure the fast and stable insertion of the aviation plug, and ensure the reliability and stability of the connection. In order to ensure the accurate alignment of the lower aviation plug locking block 116 and the upper aviation plug module 427, a guide column 427-1 is also provided at the lower part of the upper aviation plug module 427, and a corresponding guide hole is provided on the lower aviation plug locking block 116. When the lower aviation plug locking block 116 is docked with the upper aviation plug module 427, the guide column 427-1 is used to achieve guiding cooperation, thereby improving the docking accuracy of the lower aviation plug locking block 116 and the upper aviation plug module 427.

[0067] like Figures 2 to 8 As shown, in this embodiment, the above-mentioned lower pipeline connection assembly includes a left lower pipeline connection seat 113 arranged on one side of the left positioning plate 106 and / or a right lower pipeline connection seat 213 arranged on one side of the right positioning plate 206, the left lower pipeline connection seat 113 is provided with a left pipeline plug hole 113-1 consistent with the plug-in direction of the left zero point positioning seat 107, and the right lower pipeline connection seat 213 is provided with a right pipeline plug hole 213-1 consistent with the plug-in direction of the right zero point positioning seat 207; the upper pipeline connection assembly includes a left upper pipeline connection seat 426 arranged on one side of the horizontal portion 422 of the left ear plate and / or a right upper pipeline connection seat 436 arranged on one side of the horizontal portion 432 of the right ear plate, the lower side surface of the left upper pipeline connection seat 426 is provided with a left pipeline plug 426-1 matched with the left pipeline plug hole 113-1, and the lower side surface of the right upper pipeline connection seat 436 is provided with a right pipeline plug 436-1 matched with the right pipeline plug hole 213-1. When installing the welding fixture 400, the corresponding pipeline plug can be simultaneously inserted into the corresponding pipeline jack to achieve the connection and conduction of the pipeline. Whether the upper and lower pipeline connection seats are arranged in one group on one side or in one group on both sides depends on the number of gas circuits on the fixture assembly 400. In this embodiment, the lower pipeline connection assembly includes a left lower pipeline connection seat 113 arranged on one side of the left positioning plate 106 and a right lower pipeline connection seat 213 arranged on one side of the right positioning plate 206, and the upper pipeline connection assembly includes a left upper pipeline connection seat 426 arranged on one side of the left ear plate horizontal portion 422 and a right upper pipeline connection seat 436 arranged on one side of the right ear plate horizontal portion 432, which can meet the needs of rapid connection of complex pipelines.

[0068] Through the above-mentioned quick aviation plug and pipeline docking design, the electrical connection and air pipeline connection of the welding fixture are realized, which can ensure the quick and stable docking of the aviation plug and the air pipeline, and ensure the connection reliability and stability. When replacing the welding fixture, the connection of the pipeline can also be quickly disconnected without cumbersome pipeline disassembly and assembly work. The replacement time of the welding fixture is compressed from more than 20 minutes to about 2 minutes. Without sacrificing the clamping and positioning accuracy, the replacement efficiency of the welding fixture can be increased by more than 10 times.

[0069] As Figure 2 and Figure 3 shown, in this embodiment, a left seat plate positioning groove 103-1 is provided on the left turning seat 103. The left positioning plate 106 is positioned and installed in the left seat plate positioning groove 103-1 of the left turning seat 103 through the left mounting plate 105. The left mounting plate 105 is positioned and embedded in the left seat plate positioning groove 103-1. The seat plate positioning groove of the turning seat ensures the installation accuracy and firmness of the positioning plate, and can ensure the high self-precision of the quick-switching positioning and locking device. A left rough positioning guide block 112 perpendicular to the left positioning plate 106 is also provided on the left turning seat 103. An ear plate slot 422-1 adapted to the left rough positioning guide block 112 is provided on the outer side of the horizontal part 422 of the left ear plate (as Figure 7 shown). The ear plate slot 422-1 can be in a "U" shape, and the upper end of the left rough positioning guide block 112 can be provided with an inclined chamfer to facilitate the cooperation between the ear plate slot 422-1 and the left rough positioning guide block 112. Similarly, as Figure 4 and Figure 5 shown, in this embodiment, a right seat plate positioning groove 203-1 is provided on the right turning seat 203. The right positioning plate 206 is positioned and installed in the right seat plate positioning groove 203-1 of the right turning seat 203 through the right mounting plate 205. The right positioning plate 206 is positioned and embedded in the right seat plate positioning groove 203-1. The seat plate positioning groove of the turning seat ensures the installation accuracy and firmness of the positioning plate, and can ensure the high self-precision of the quick-switching positioning and locking device. A right rough positioning guide block 212 perpendicular to the right positioning plate 206 is also provided on the right turning seat 203. An ear plate slot 432-1 adapted to the right rough positioning guide block 212 is provided on the outer side of the horizontal part 432 of the right ear plate (as Figure 8 shown). The ear plate slot 432-1 can be in a "U" shape, and the upper end of the right rough positioning guide block 212 can be provided with an inclined chamfer to facilitate the cooperation between the ear plate slot 432-1 and the right rough positioning guide block 212. By adopting the guiding cooperation of the above-mentioned rough positioning guide block and the ear plate slot, the welding fixture can be quickly aligned during installation, so that the zero-point positioning fixture, each positioning pin, and the calibration positioning plate can be quickly and accurately aligned, further ensuring the convenience and accuracy of the clamping operation of the welding fixture.

[0070] catch Figures 9 to 11 As shown, in this embodiment, a flip locking cylinder 104 is provided on one of the left support seat 101 and the right support seat 201, and a positioning locking pin 204 is provided on the other. The left flip seat 103 and the right flip seat 203 are correspondingly provided with circumferentially distributed flip positioning holes, and the locking pin 104-1 of the flip locking cylinder 104 and the positioning locking pin 204 are respectively matched with the corresponding flip positioning holes. The flip locking cylinder 104 and the positioning locking pin 204 are used to position and lock the left when replacing the fixture assembly 400. The side flip seat 103 and the right flip seat 203 can be positioned and fixed by using the flip locking cylinder 104 and the positioning locking pin 204, thereby ensuring the safety of the replacement of the welding fixture; and the flip locking cylinder 104 and the positioning locking pin 204 cooperate, the flip locking cylinder 104 can move quickly to achieve the rapid locking or unlocking of the flip seat, and the positioning locking pin 204 requires manual unlocking operation, which can remind manual inspection, further ensuring the replacement safety and clamping reliability of the welding fixture. Furthermore, the positioning locking pin 204 is also provided with a sensor for detecting its current state, which is used to control whether the welding work is started according to the position of the positioning locking pin 204. When replacing the welding fixture, the locking pin 104-1 of the flip locking cylinder 104 is inserted into the corresponding flip positioning hole, and the manually operated positioning locking pin 204 is also inserted into the corresponding flip positioning hole to fix the flip seat; then the welding fixture is replaced on the left and right positioning locking assemblies, and after the welding fixture is positioned and locked, the locking pin 104-1 of the flip locking cylinder 104 is automatically retracted, and the positioning locking pin 204 is unlocked after manual inspection and confirmation. After the unlocking operation is recognized by the sensor, welding can be carried out; if the positioning locking pin 204 is not unlocked manually, the welding system cannot work at this time. The manual operation of the positioning locking pin 204 can remind the manual inspection, further ensuring the replacement safety and clamping reliability of the welding fixture.

[0071] like Figure 2 As shown, specifically in this embodiment, the left zero point positioning seat 107 is located between the left first correction positioning plate 108 and the left second correction positioning plate 109. The left first correction positioning plate 108 and the left second correction positioning plate 109 are rack plates with correction directions perpendicular to each other, and are used to guide and limit the welding fixture in the X direction and the Y direction respectively. Figure 4As shown, the right zero point positioning seat 207 is located between the right first correction positioning plate 208 and the right second correction positioning plate 209. The right first correction positioning plate 208 and the right second correction positioning plate 209 are rack plates with the same correction direction, which are used to guide and limit the welding fixture in the X direction. The left first correction positioning plate 108 and the left second correction positioning plate 109 are respectively arranged along the length direction and width direction of the fixture assembly 400. The right first correction positioning plate 208 and the right second correction positioning plate 209 are both arranged along the length direction of the fixture assembly 400, that is, the left first correction positioning plate 108 is an X-direction guide limit block, and the left second correction positioning plate 109, the right first correction positioning plate 208 and the right second correction positioning plate 209 are all Y-direction guide limit blocks. The mutual engagement of the rack plates can achieve precise positioning and ensure the stability of the installation, avoiding loosening of the welding fixture during welding or flipping; at the same time, the rack plates in two perpendicular directions can achieve precise positioning in both the X and Y directions, ensuring that the fixture has higher clamping accuracy.

[0072] Reference Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the left support seat 101 is fixed to the welding workbench 300 through the left connecting seat 102, and the right support seat 201 is fixed to the welding workbench 300 through the right connecting seat 202; the welding workbench 300 is installed on the rotating base 500 (such as Fig.12 ). The left connecting seat 102 and the right connecting seat 202 are both welded metal plates with high structural strength, which can ensure the firmness and reliability of the connection between the support seat and the welding workbench 300. The rotating base 500 allows the welding workbench 300 to rotate as a whole, and the welding position can be flexibly switched. With the welding equipment, high-precision welding of complex parts can be flexibly achieved. A driving motor and a reduction mechanism can be set in the rotating base 500. The driving motor drives the welding workbench 300 to rotate after being decelerated by the reduction mechanism.

[0073] This embodiment also relates to a welding workstation. Figure 12 to Figure 14As shown, the welding workstation includes a welding robot 600 and a fast switching positioning and locking device of the welding fixture. The welding robot 600 is installed on the welding workbench 300. The welding robot 600 welds the parts to be welded 700 on the fixture assembly 400, thereby realizing the automatic welding of the parts. In order to improve the welding efficiency, a pair of left positioning and locking assemblies 100 and a right positioning and locking assembly 200 are respectively provided on both sides of the welding workbench 300, and a first welding station A and a second welding station B are formed on both sides of the welding workbench 300. Two welding robots 600 are correspondingly provided on the welding workbench 300, one for the welding operation of the first welding station A, and the other for the welding operation of the second welding station B, which can realize the synchronous welding of the double stations, thereby greatly improving the efficiency of the welding process.

[0074] like Fig.13 and Fig.14 As shown, in the welding workstation of this embodiment, when replacing the fixture assembly 400, the flip seats on both sides are fixed by the flip locking cylinder 104 and the positioning locking pin 204, and the fixture assembly 400 is hoisted to the first welding station A or the second welding station B, and the left positioning ear plate assembly 42 and the right positioning ear plate assembly 43 on both sides of the fixture assembly 400 are docked and positioned with the left positioning locking assembly 100 and the right positioning locking assembly 200 on the corresponding side respectively. The process uses the coarse positioning guide blocks on both sides for guidance to ensure that the zero-point pull nail can be accurately inserted into the zero-point positioning seat, and the corresponding positioning tooth plate can be aligned with the calibration plate. The positive positioning plate is accurately engaged; after the photoelectric sensor detects that the fixture assembly 400 is installed in place, the zero-point positioning seats on both sides position and lock the zero-point pull nails, and cooperate with each correction positioning plate and positioning tooth plate to achieve precise positioning in the X and Y directions; after the zero-point positioning seat is locked, a locking signal is issued, and the pneumatic locking pins on both sides are actuated to further fix the fixture assembly 400. At this time, the upper and lower pipeline connection seats complete the pipeline docking to achieve rapid connection of each gas circuit; after the pneumatic locking pin is laterally locked, the aviation plug cylinder 115 drives the lower aviation plug locking block 116 to dock and lock with the upper aviation plug module 427 to achieve electrical connection. At this point, the replacement of the fixture assembly 400 is completed. After that, the part 700 to be welded is installed on the fixture bracket 41 of the fixture assembly 400, and the part 700 to be welded is clamped and fixed by the clamping cylinder 44. Finally, the flip locking cylinder 104 is retracted to unlock the flip seat on one side, and the positioning locking pin 204 is unlocked after manual inspection and confirmation, and the flip motor 215 is used to drive the entire fixture assembly 400 to flip, and cooperate with the welding robot 600 to perform welding operations on the parts to be welded 700. The first welding station A and the second welding station B can be welded independently, or they can be welded in cooperation with different welding equipment. After welding at one station is completed, the rotating base 500 can be used to drive the welding table 300 to rotate a certain angle and switch to a different welding station for welding, and multiple welding equipment can cooperate to complete the welding work.

[0075] The invention discloses a quick-switching positioning and locking device for a welding fixture and a welding workstation, which positions and locks the welding fixture on two different surfaces, and utilizes the zero-point positioning fixture and the two-way correction positioning plate on the left and right positioning plates to realize the precise positioning and correction of the left and right positioning ear plates of the fixture, thereby ensuring the repeated positioning accuracy of replacing different welding fixtures; at the same time, a photoelectric sensor is utilized to detect the installation status of the welding fixture, and the upper and lower pipeline connection components are utilized to realize the quick connection of the pipeline after the welding fixture is locked, and the pneumatic aviation plug locking component is utilized to realize the quick connection of the electrical circuit of the welding fixture, without the need for tedious and complicated electrical and pipeline connection operations, and the replacement time of the welding fixture is compressed from the original more than 20 minutes to about 2 minutes, which not only greatly improves the clamping accuracy of the welding fixture and ensures the welding accuracy, but also the clamping and replacement efficiency of the welding fixture is higher, and the electrical and pipeline connections can be quickly realized, the operation is simple and convenient, and the welding fixture can be adapted to different welding fixtures, thereby improving the adaptability and versatility of the fixture. In addition, since the correction direction of at least one of the four positioning plates, namely the first correction positioning plate on the left, the second correction positioning plate on the left, the first correction positioning plate on the right and the second correction positioning plate on the right, is perpendicular to the correction directions of the other positioning plates, the welding fixture can be quickly and accurately positioned in two directions. Combined with the locking and positioning of the zero-point positioning fixture and the pneumatic locking pin, the welding fixture can be firmly fixed and accurately positioned, overcoming the problem of low repeated clamping accuracy in the prior art.

[0076] The present invention and its embodiments are described schematically above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and creatively designs a structure and an embodiment similar to the technical solution without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A fast-switching positioning and locking device for a welding fixture, comprising a left positioning and locking assembly (100) and a right positioning and locking assembly (200) arranged on a welding workbench (300) in a relative manner, wherein a welding station for installing a fixture assembly (400) is formed between the left positioning and locking assembly (100) and the right positioning and locking assembly (200), and characterized in that: The left positioning and locking assembly (100) comprises a left supporting seat (101) mounted on the welding workbench (300), a left flipping seat (103) rotatably mounted on the left supporting seat (101), a left positioning plate (106) vertically fixed on the left flipping seat (103), and a left pneumatic locking pin (111) mounted on the lower part of the left positioning plate (106); a left zero point positioning seat (107), a left first correction positioning plate (108), a left second correction positioning plate (109) and a left photoelectric sensor (114) are provided on a side of the left positioning plate (106) facing away from the left pneumatic locking pin (111); The right positioning and locking assembly (200) comprises a right supporting seat (201) mounted on the welding workbench (300), a right flipping seat (203) rotatably mounted on the right supporting seat (201), a right positioning plate (206) vertically fixed on the right flipping seat (203), and a right pneumatic locking pin (211) mounted on the lower part of the right positioning plate (206); a right zero point positioning seat (207), a right first correction positioning plate (208), a right second correction positioning plate (209) and a right photoelectric sensor (214) are provided on a side of the right positioning plate (206) facing away from the right pneumatic locking pin (211); The correction direction of at least one of the four positioning plates, namely, the first correction positioning plate (108) on the left side, the second correction positioning plate (109) on the left side, the first correction positioning plate (208) on the right side, and the second correction positioning plate (209) on the right side, is perpendicular to the correction directions of the other positioning plates; the left positioning plate (106) and / or the right positioning plate (206) are also provided with a pneumatic aviation plug locking assembly and a lower pipe connection assembly; the left support seat (101) or the right support seat (201) is also provided with a flip motor (215) for driving the flip seat on the corresponding side to perform a flipping movement; The clamp assembly (400) comprises a clamp support (41), a left positioning ear plate assembly (42) and a right positioning ear plate assembly (43) arranged at the left and right ends of the clamp support (41), and a plurality of clamping cylinders (44) arranged on the clamp support (41); wherein: The left positioning ear plate assembly (42) comprises a left ear plate vertical portion (421) and a left ear plate horizontal portion (422) arranged on the upper portion of the left ear plate vertical portion (421); the left ear plate vertical portion (421) is provided with a left ear plate locking hole (421-1) matched with the above-mentioned left pneumatic locking pin (111); the lower side surface of the left ear plate horizontal portion (422) is respectively provided with a left zero point rivet (423) matched with the above-mentioned left zero point positioning seat (107), a left first positioning tooth plate (424) matched with the above-mentioned left first correction positioning plate (108), and a left second positioning tooth plate (425) matched with the above-mentioned left second correction positioning plate (109); The right positioning ear plate assembly (43) comprises a right ear plate vertical portion (431) and a right ear plate horizontal portion (432) arranged on the upper portion of the right ear plate vertical portion (431); the right ear plate vertical portion (431) is provided with a right ear plate locking hole (431-1) matching with the above-mentioned right pneumatic locking pin (211); the lower side surface of the right ear plate horizontal portion (432) is respectively provided with a right zero point pull nail (433) matching with the above-mentioned right zero point positioning seat (207), a right first positioning tooth plate (434) matching with the above-mentioned right first correction positioning plate (208), and a right second positioning tooth plate (435) matching with the above-mentioned right second correction positioning plate (209); The left positioning ear plate assembly (42) and / or the right positioning ear plate assembly (43) are also provided with an upper aviation plug docking assembly corresponding to the above-mentioned pneumatic aviation plug locking assembly, and an upper pipeline connection assembly corresponding to the above-mentioned lower pipeline connection assembly; after the clamp assembly (400) is positioned and locked on the left positioning locking assembly (100) and the right positioning locking assembly (200) on the corresponding side, the pneumatic aviation plug locking assembly is docked with the upper aviation plug docking assembly to achieve electrical connection, and the lower pipeline connection assembly is docked with the upper pipeline connection assembly to achieve pipeline connection.

2. The rapid switching positioning and locking device for a welding fixture according to claim 1, characterized in that: The pneumatic aviation plug locking assembly comprises an aviation plug cylinder (115) and a lower aviation plug locking block (116), wherein the lower aviation plug locking block (116) is mounted on the driving end of the aviation plug cylinder (115), and the upper aviation plug docking assembly comprises an upper aviation plug module (427) opposite to the lower aviation plug locking block (116), and the aviation plug cylinder (115) drives the lower aviation plug locking block (116) to dock and lock with the upper aviation plug module (427) according to the detection signal of the left photoelectric sensor (114) and / or the right photoelectric sensor (214) to realize electrical quick connection.

3. The rapid switching positioning and locking device for a welding fixture according to claim 1, characterized in that: The lower pipe connection assembly comprises a left lower pipe connection seat (113) arranged on one side of the left positioning plate (106) and / or a right lower pipe connection seat (213) arranged on one side of the right positioning plate (206); the left lower pipe connection seat (113) is provided with a left pipe plug hole (113-1) which is consistent with the plugging direction of the left zero point positioning seat (107); the right lower pipe connection seat (213) is provided with a right pipe plug hole (213-1) which is consistent with the plugging direction of the right zero point positioning seat (207); The upper pipe connection assembly comprises a left upper pipe connection seat (426) arranged on one side of the horizontal portion (422) of the left ear plate and / or a right upper pipe connection seat (436) arranged on one side of the horizontal portion (432) of the right ear plate, wherein the lower side surface of the left upper pipe connection seat (426) is provided with a left pipe plug (426-1) matching with the left pipe plug hole (113-1), and the lower side surface of the right upper pipe connection seat (436) is provided with a right pipe plug (436-1) matching with the right pipe plug hole (213-1).

4. The rapid switching positioning and locking device for a welding fixture according to claim 1, characterized in that: The left flip seat (103) is provided with a left seat plate positioning groove (103-1), the left positioning plate (106) is positioned and installed in the left seat plate positioning groove (103-1) of the left flip seat (103) through the left mounting plate (105), the left flip seat (103) is also provided with a left rough positioning guide block (112) perpendicular to the left positioning plate (106), and the outer side of the left ear plate horizontal part (422) is provided with a left ear plate slot (422-1) adapted to the left rough positioning guide block (112); The right flip seat (203) is provided with a right seat plate positioning groove (203-1), the right positioning plate (206) is positioned and installed in the right seat plate positioning groove (203-1) of the right flip seat (203) through the right mounting plate (205), the right flip seat (203) is also provided with a right rough positioning guide block (212) perpendicular to the right positioning plate (206), and the outer side of the right ear plate horizontal part (432) is provided with a right ear plate slot (432-1) adapted to the right rough positioning guide block (212).

5. The rapid switching positioning and locking device for a welding fixture according to claim 1, characterized in that: One of the left support seat (101) and the right support seat (201) is provided with a flip locking cylinder (104), and the other is provided with a positioning locking pin (204). The left flip seat (103) and the right flip seat (203) are correspondingly provided with circumferentially distributed flip positioning holes. The locking pin (104-1) and the positioning locking pin (204) of the flip locking cylinder (104) are respectively matched with the corresponding flip positioning holes. The flip locking cylinder (104) and the positioning locking pin (204) are used to position and lock the left flip seat (103) and the right flip seat (203) when replacing the fixture assembly (400).

6. The rapid switching positioning and locking device for a welding fixture according to claim 5, characterized in that: The positioning locking pin (204) is also provided with a sensor for detecting its current state, so as to control whether the welding work is started according to the position of the positioning locking pin (204).

7. The rapid switching positioning and locking device for a welding fixture according to claim 1, characterized in that: The left zero point positioning seat (107) is located between the left first correction positioning plate (108) and the left second correction positioning plate (109); the left first correction positioning plate (108) and the left second correction positioning plate (109) are rack plates with correction directions perpendicular to each other, and are used to guide and limit the welding fixture in the X direction and the Y direction respectively; the right zero point positioning seat (207) is located between the right first correction positioning plate (208) and the right second correction positioning plate (209); the right first correction positioning plate (208) and the right second correction positioning plate (209) are rack plates with correction directions consistent with each other, and are used to guide and limit the welding fixture in the X direction.

8. The rapid switching positioning and locking device for a welding fixture according to claim 1, characterized in that: The left support seat (101) is fixed on the welding workbench (300) via the left connecting seat (102), and the right support seat (201) is fixed on the welding workbench (300) via the right connecting seat (202); the welding workbench (300) is installed on a rotating base (500).

9. A welding workstation, comprising a welding robot (600), characterized in that: It also comprises a quick-switching positioning and locking device for a welding fixture as claimed in any one of claims 1 to 8, and the welding robot (600) is installed on a welding workbench (300).

10. The welding workstation according to claim 9, characterized in that: A pair of left positioning and locking assemblies (100) and a right positioning and locking assemblies (200) are respectively provided on both sides of the welding workbench (300), a first welding station (A) and a second welding station (B) are formed on both sides of the welding workbench (300), and two welding robots (600) are correspondingly provided on the welding workbench (300).

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