A pre-spot welding type girth welding machine

Abstract

This utility model discloses a pre-spot welding ring welding machine, relating to the field of welding machine technology. It includes a base with a sliding mechanism inside. Two mounting boxes are located on the top of the sliding mechanism, each containing a rotating spindle. One mounting box contains a drive mechanism. The ends of the two rotating spindles, close to each other, pass through the mounting boxes and are fixedly mounted with pressure plates. A clamping mechanism is located on the outside of the rotating spindles. Top mounting brackets are fixedly mounted on the top of both mounting boxes. The advantages of this utility model are: by using pre-spot welding before ring welding, the workpieces to be welded are pre-welded at multiple points, thereby increasing the stability between the workpieces during welding. Furthermore, it eliminates the need for a continuously fixed posture during welding, avoiding relative movement between the workpieces during ring welding, making welding more convenient and stable.

Description

Technical Field

[0001] This utility model relates to the field of welding machine technology, specifically a pre-spot welding ring welding machine. Background Technology

[0002] A circumferential welding machine is a general-purpose automatic welding device used for welding circular and circumferential welds. It can weld materials such as carbon steel, stainless steel, aluminum and its alloys, and supports various welding processes including argon arc welding, plasma welding, submerged arc welding, TIG welding, and MIG welding. According to the workpiece shape, it is divided into vertical and horizontal welding machines, as well as welding positioners and manipulators.

[0003] Currently used horizontal circumferential welding machines require pre-positioning of the workpieces before welding to ensure that the centers of the two workpieces being welded are on the same horizontal line. However, during welding, the workpieces need to be kept in a clamped state at all times to ensure the stability of the circumferential welding. This means that the influence of the clamping and alignment mechanisms needs to be considered during the welding process. To address this, we propose a pre-spot welding type circumferential welding machine. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a pre-spot welding ring welding machine, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pre-spot welding ring welding machine, comprising a base, a sliding mechanism inside the base, two mounting boxes on the top of the sliding mechanism, a rotating spindle rotatably connected inside each of the two mounting boxes, a driving mechanism inside one of the mounting boxes, a clamping plate fixedly mounted on one end of each of the two rotating spindles that is close to each other, and a clamping mechanism on the outside of the rotating spindle. A top mounting frame is fixedly mounted on the top of each of the two mounting boxes, a ring welding mechanism and a spot welding mechanism are provided on the outside of the top mounting frame, two branch pipe mechanisms are provided on the top of the base, and a ring welding workpiece is placed above the branch pipe mechanisms. The circumferential welding mechanism includes a first fixed mounting plate, which is fixedly mounted on one side of a top mounting bracket. A first inner sliding groove is formed inside the first fixed mounting plate. Two second sliding rails are fixedly mounted on one side of the first fixed mounting plate. A third slider is slidably connected to the outer side of each of the second sliding rails. A first movable mounting plate is fixedly mounted on one side of the two third sliders. A first sliding plate is fixedly mounted on one side of the first movable mounting plate. The first sliding plate is inserted into and slidably connected to the first inner sliding groove. A fourth cylinder is fixedly mounted on the top of the first fixed mounting plate. The output end of the fourth cylinder is fixedly connected to the first sliding plate. The first movable mounting plate is located away from the third slider. A fourth slide rail is fixedly installed on one side, and a fourth slider is slidably connected to the outer side of the fourth slide rail. A second movable mounting plate is fixedly installed on the outer side of several fourth sliders. A fifth slider is fixedly installed on the side of the second movable mounting plate near the fourth slider. A second servo motor is fixedly installed on the top of the first movable mounting plate. A transmission screw is fixedly installed on the output end of the second servo motor. The transmission screw is rotatably connected to the first movable mounting plate. The transmission screw is inserted into the interior of the fifth slider and threadedly connected to it. A side mounting plate is fixedly installed on one side of the second movable mounting plate. A circumferential welding mounting bracket is fixedly installed on the bottom of the side mounting plate. A circumferential welding torch is fixedly installed on one side of the circumferential welding mounting bracket.

[0006] Preferably, the sliding mechanism includes a bidirectional lead screw located inside and rotatably connected to the base. A first sliding groove is provided on the top of the base, and two second sliders are slidably connected inside the first sliding groove. A bottom mounting plate is fixedly installed on the top of each of the two second sliders. The mounting box is fixedly installed on the top of the bottom mounting plate. A reduction motor is fixedly installed on the outside of the base, and the output end of the reduction motor is fixedly connected to one end of the bidirectional lead screw.

[0007] Preferably, the drive mechanism includes a first servo motor, which is fixedly installed inside one of the mounting boxes. A first synchronous pulley is fixedly installed at the output end of the first servo motor. A second synchronous transmission pulley is fixedly installed on the outer side of one of the rotating spindles. A synchronous transmission belt is provided between the first synchronous pulley and the second synchronous transmission pulley, and the first synchronous pulley is connected to the second synchronous transmission pulley through the synchronous transmission belt. One end of the rotating spindle extends out of the outer side of the mounting box and is fixedly installed with a rotary encoder. The angle of rotation of the rotating spindle can be determined by the rotary encoder.

[0008] Preferably, the clamping mechanism includes a main mounting plate with two limiting grooves inside. Two limiting strips are fixedly installed on the outer side of the rotating spindle, and the limiting strips are located inside the limiting grooves and slidably connected thereto. An inner rotating disk is slidably connected to the outer side of the rotating spindle and inside the mounting box. A connecting rod is fixedly installed on one side of the main mounting plate, and the connecting rod passes through the mounting box and is fixedly installed with an annular slider. An annular groove is opened on one side of the main mounting plate, and the annular slider is inserted into the annular groove and slidably connected thereto. A third cylinder is fixedly installed on one side of the inner wall of the mounting box, and the output end of the third cylinder is fixedly connected to the inner rotating disk. Two outer mounting brackets are fixedly installed on the outer side of the main mounting plate. A second cylinder is fixedly installed on the top and bottom of each outer mounting bracket. A pre-limiting plate is fixedly installed on the output end of each of the two second cylinders. The pre-limiting plate has spot weld holes inside.

[0009] Preferably, the spot welding mechanism includes a second fixed mounting plate, which is fixedly mounted on one side of the top mounting frame. Two fifth guide rails are fixedly mounted on one side of the second fixed mounting plate. A sixth slider is slidably connected to the outer side of the fifth guide rails. A movable mounting frame is fixedly mounted on one side of the two sixth sliders. A second sliding plate is fixedly mounted on one side of the movable mounting frame. A second inner sliding groove is formed inside the second fixed mounting plate. The second sliding plate is inserted into the inner sliding groove and slidably connected thereto. A fifth cylinder is fixedly mounted on the top of the second fixed mounting plate. The output end of the fifth cylinder is fixedly connected to the second sliding plate. A mounting rod is fixedly mounted inside the movable mounting frame. A spot welding mounting frame is fixedly mounted on one side of the mounting rod. Two spot welding guns are fixedly mounted on one side of the spot welding mounting frame.

[0010] Preferably, the branch pipe mechanism includes a support mounting plate, which is fixedly mounted on the top of the base. A sixth cylinder is fixedly mounted on the top of the support mounting plate, and a support mounting bracket is fixedly mounted on the output end of the sixth cylinder. A support arc plate is fixedly mounted on one side of the support mounting bracket by screws. The liftable support arc plate can support the circumferential welded workpiece from the bottom.

[0011] Preferably, a first slide rail is fixedly installed on each of the corresponding sides of the top of the base, and a first slider is fixedly installed on the bottom of the bottom mounting plate. The first slide rail and the first slider are slidably connected, which increases the stability of the bottom mounting plate sliding on the top of the base.

[0012] Preferably, a stop mounting bracket is slidably connected to the top of the base and outside the first slide rail, the stop mounting bracket is provided with a first cylinder, and a stop block is fixedly installed on the top of the base.

[0013] Preferably, a control box is fixedly mounted on the top of one of the mounting boxes for controlling the electrical and pneumatic equipment on the circumferential welding device and for operation by the user.

[0014] This utility model provides a pre-spot welding ring welding machine, which has the following beneficial effects: 1. This pre-spot welding ring welding machine pre-spot welds the workpieces to be welded in multiple points before ring welding, thereby increasing the stability between the workpieces during welding. Moreover, it does not require continuous fixed posture during welding, avoiding relative movement between the workpieces during ring welding, making welding more convenient and more stable.

[0015] 2. This pre-spot welding ring welding machine uses a dual fixing method of clamping and holding to secure the workpiece to be welded. It employs a rotating structure and a retractable clamping assembly, allowing the clamping mechanism to retract after spot welding, thus preventing any impact on the workpiece during the ring welding process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a partial sectional view of the base of this utility model; Figure 4 This utility model Figure 3 Enlarged view of point A in the image; Figure 5 This is a schematic diagram of the interior of the mounting box of this utility model; Figure 6 This is a schematic diagram of the clamping mechanism of this utility model; Figure 7 This is a partial unfolded schematic diagram of the clamping mechanism of this utility model. Figure 8 This is a cross-sectional view of the main mounting disk of this utility model; Figure 9 This is a schematic diagram of the structure of the rotating spindle of this utility model; Figure 10 This utility model Figure 6 Enlarged view of point B in the image; Figure 11 This is a partial structural schematic diagram of the present invention; Figure 12 This is a schematic diagram of the spot welding mechanism of this utility model; Figure 13 This is a schematic diagram of the top mounting bracket of this utility model; Figure 14 This is a schematic diagram of the ring welding mechanism of this utility model. Figure 15 This is a schematic diagram showing the ring welding mechanism of this utility model from another perspective.

[0017] In the diagram: 1. Base; 2. First slide groove; 3. First slide rail; 4. First slider; 5. Bottom mounting plate; 6. Two-way lead screw; 7. Second slider; 8. Gear motor; 9. Mounting box; 10. Control box; 11. Ring-welded workpiece; 12. Rotary spindle; 13. First servo motor; 14. First synchronous pulley; 15. Synchronous transmission belt; 16. Second synchronous transmission pulley; 17. Clamping mechanism; 18. Pressure plate; 19. Top mounting bracket; 20. Ring-welding mechanism; 23. Stop mounting bracket; 24. First cylinder; 25. Stop block; 1701. Main mounting plate; 1702. External mounting bracket; 1703. Second cylinder; 1704. Pre-limiting plate; 1705. Spot weld hole; 1706. Third cylinder; 1707. Inner rotating plate; 1708. Connecting rod; 1709. Annular slider; 1710. Annular groove; 1711. Limiting strip; 1712. Limiting groove; 2001, First fixed mounting plate; 2002, First inner slide groove; 2003, Second slide rail; 2004, Third slider; 2005, First movable mounting plate; 2006, First sliding plate; 2007, Fourth cylinder; 2008, Fourth slide rail; 2009, Fourth slider; 2010, Second movable mounting plate; 2011, Transmission screw; 2012, Second servo motor; 2013, Fifth slider; 2014, Side mounting plate; 2015, Ring welding mounting bracket; 2016, Ring welding torch; 2101. Second fixed mounting plate; 2102. Fifth guide rail; 2103. Sixth slider; 2104. Movable mounting bracket; 2105. Second sliding plate; 2106. Fifth cylinder; 2107. Mounting rod; 2108. Spot welding mounting bracket; 2109. Spot welding torch; 2110. Second inner sliding groove; 21. Spot welding mechanism; 22. Branch pipe mechanism; 2201. Support mounting plate; 2202. Sixth cylinder; 2203. Support mounting frame; 2204. Support arc plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1 to 15This utility model provides a technical solution: a pre-spot welding ring welding machine, including a base 1, a sliding mechanism is provided inside the base 1, two mounting boxes 9 are provided on the top of the sliding mechanism, a rotating spindle 12 is rotatably connected inside the two mounting boxes 9, a driving mechanism is provided inside one of the mounting boxes 9, a pressure plate 18 is fixedly installed at one end of the two rotating spindles 12 that are close to each other, and a clamping mechanism 17 is provided on the outside of the rotating spindle 12, a top mounting frame 19 is fixedly installed on the top of the two mounting boxes 9, and a ring welding mechanism 20 and a spot welding mechanism 21 are provided on the outside of the top mounting frame 19; The circumferential welding mechanism 20 includes a first fixed mounting plate 2001, which is fixedly mounted on one side of the top mounting bracket 19. The first fixed mounting plate 2001 has a first inner sliding groove 2002 inside. Two second slide rails 2003 are fixedly mounted on one side of the first fixed mounting plate 2001. A third slider 2004 is slidably connected to the outer side of each of the second slide rails 2003. A first movable mounting plate 2005 is fixedly mounted on one side of the two third sliders 2004. A first sliding plate 2006 is fixedly mounted on one side of the first movable mounting plate 2005. The first sliding plate 2006 is inserted into and slidably connected to the first inner sliding groove 2002. The top of the first fixed mounting plate 2001 is fixedly mounted... A fourth cylinder 2007 is installed, and its output end is fixedly connected to a first sliding plate 2006. A fourth slide rail 2008 is fixedly installed on the side of a first movable mounting plate 2005 away from the third slider 2004. A fourth slider 2009 is slidably connected to the outer side of the fourth slide rail 2008. A second movable mounting plate 2010 is fixedly installed on the outer sides of several fourth sliders 2009. A fifth slider 2013 is fixedly installed on the side of the second movable mounting plate 2010 near the fourth sliders 2009. A second servo motor 2012 is fixedly installed on the top of the first movable mounting plate 2005. A transmission screw 2011 is fixedly installed on the output end of the second servo motor 2012. The transmission screw 2011 is connected to... The first movable mounting plate 2005 is rotatably connected, and the transmission screw 2011 is inserted into the interior of the fifth slider 2013 and threadedly connected thereto. A side mounting plate 2014 is fixedly mounted on one side of the second movable mounting plate 2010, and a circumferential welding mounting bracket 2015 is fixedly mounted on the bottom of the side mounting plate 2014. A circumferential welding torch 2016 is fixedly mounted on one side of the circumferential welding mounting bracket 2015. The spot welding mechanism 21 includes a second fixed mounting plate 2101, which is fixedly mounted on one side of the top mounting bracket 19. Two fifth guide rails 2102 are fixedly mounted on one side of the second fixed mounting plate 2101, and a sixth slider 2103 is slidably connected to the outer side of the fifth guide rails 2102. The two sixth sliders 2103... A movable mounting bracket 2104 is fixedly installed on one side. A second sliding plate 2105 is fixedly installed on one side of the movable mounting bracket 2104. A second inner sliding groove 2110 is opened inside the second fixed mounting plate 2101. The second sliding plate 2105 is inserted into the second inner sliding groove 2110 and slidably connected to it. A fifth cylinder 2106 is fixedly installed on the top of the second fixed mounting plate 2101. The output end of the fifth cylinder 2106 is fixedly connected to the second sliding plate 2105. An installation rod 2107 is fixedly installed inside the movable mounting bracket 2104. A spot welding mounting bracket 2108 is fixedly installed on one side of the installation rod 2107. Two spot welding guns 2109 are fixedly installed on one side of the spot welding mounting bracket 2108.

[0020] The sliding mechanism includes a bidirectional lead screw 6, which is located inside the base 1 and rotatably connected to it. A first sliding groove 2 is provided on the top of the base 1. Two second sliders 7 are slidably connected inside the first sliding groove 2. A bottom mounting plate 5 is fixedly installed on the top of each of the two second sliders 7. A mounting box 9 is fixedly installed on the top of the bottom mounting plate 5. A reduction motor 8 is fixedly installed on the outside of the base 1. The output end of the reduction motor 8 is fixedly connected to one end of the bidirectional lead screw 6.

[0021] The drive mechanism includes a first servo motor 13, which is fixedly installed inside one of the mounting boxes 9. A first synchronous pulley 14 is fixedly installed at the output end of the first servo motor 13. A second synchronous transmission pulley 16 is fixedly installed on the outside of one of the rotating spindles 12. A synchronous transmission belt 15 is provided between the first synchronous pulley 14 and the second synchronous transmission pulley 16, and the first synchronous pulley 14 is connected to the second synchronous transmission pulley 16 through the synchronous transmission belt 15. One end of the rotating spindle 12 extends out of the outside of the mounting box 9 and is fixedly installed with a rotary encoder. The angle of rotation of the rotating spindle 12 can be determined by the rotary encoder.

[0022] The clamping mechanism 17 includes a main mounting plate 1701. Two limiting grooves 1712 are formed inside the main mounting plate 1701. Two limiting strips 1711 are fixedly installed on the outer side of the rotating spindle 12. The limiting strips 1711 are located inside the limiting grooves 1712 and are slidably connected to them. An inner rotating disk 1707 is slidably connected to the outer side of the rotating spindle 12 and inside the mounting box 9. A connecting rod 1708 is fixedly installed on one side of the main mounting plate 1701. The connecting rod 1708 passes through the mounting box 9 and is fixedly installed with an annular slider 1709. An annular... The slide groove 1710 and the annular slider 1709 are inserted into the annular slide groove 1710 and slidably connected thereto. A third cylinder 1706 is fixedly installed on one side of the inner wall of the mounting box 9. The output end of the third cylinder 1706 is fixedly connected to the inner rotating disk 1707. Two outer mounting brackets 1702 are fixedly installed on the outer side of the main mounting disk 1701. A second cylinder 1703 is fixedly installed on the top and bottom of the outer mounting bracket 1702. A pre-limiting disk 1704 is fixedly installed on the output end of each of the two second cylinders 1703. A spot weld hole 1705 is opened inside the pre-limiting disk 1704.

[0023] Two branch pipe mechanisms 22 are provided on the top of the base 1. A ring welded workpiece 11 is provided above the branch pipe mechanism 22. The branch pipe mechanism 22 includes a support mounting plate 2201. The support mounting plate 2201 is fixedly installed on the top of the base 1. A sixth cylinder 2202 is fixedly installed on the top of the support mounting plate 2201. A support mounting bracket 2203 is fixedly installed on the output end of the sixth cylinder 2202. A support arc plate 2204 is fixedly installed on one side of the support mounting bracket 2203 by screws. The ring welded workpiece 11 can be supported from the bottom by the liftable support arc plate 2204.

[0024] The base 1 has a first slide rail 3 fixedly installed on both sides of the top. The bottom of the base mounting plate 5 has a first slider 4 fixedly installed on the bottom. The first slide rail 3 and the first slider 4 are slidably connected, which increases the stability of the bottom mounting plate 5 sliding on the top of the base 1. The top of the base 1 and the outside of the first slide rail 3 are slidably connected to a stop mounting bracket 23. The stop mounting bracket 23 is equipped with a first cylinder 24. The top of the base 1 is fixedly installed with a stop block 25. The top of one of the mounting boxes 9 is fixedly installed with a control box 10, which is used to control the electrical and pneumatic equipment on the ring welding device and to be operated by the user.

[0025] In summary, when using this pre-spot welding ring welding machine, the ring welding workpiece 11 is first placed on the supporting arc plate 2204. Then, the sixth cylinder 2202 is activated, which drives the supporting mounting frame 2203 and the supporting arc plate 2204 to rise, moving the ring welding workpiece 11 to the welding position. The workpiece to be welded is then placed on both ends of the ring welding workpiece 11. Next, the reduction motor 8 is activated, which drives the bidirectional lead screw 6 to rotate, thereby driving the second slider 7 to move inside the first slide groove 2. This causes the bottom mounting plate 5 and the mounting box 9 installed on the first slide groove 2 to approach and contact the ring welding workpiece 11 and the workpiece to be welded, and to limit their position by compression. Then, the output end of the second cylinder 1703 extends, causing the pre-limiting plate to... 1704 contacts and clamps the outer surface of the ring weld workpiece 11, performing secondary fixation. After clamping, the sixth cylinder 2202 retracts its output end to avoid interference with the subsequent rotation of the ring weld workpiece 11. Then, spot welding is performed. During spot welding, the output end of the fifth cylinder 2106 extends, thereby driving the second sliding plate 2105 to slide inside the second inner sliding groove 2110. This causes the movable mounting bracket 2104, mounting rod 2107, spot welding mounting bracket 2108, and spot welding torch 2109 to move simultaneously towards the pre-limiting plate 1704, allowing the spot welding torch 2109 to pass through the spot welding hole 1705 and contact the surface of the workpiece to be welded, completing the pre-spot welding of the ring weld workpiece 11 and the workpiece to be welded, and then performing spot welding. After the welding torch 2109 retracts and spot welding is completed at one location, the first servo motor 13 is started. The first servo motor 13 drives the first synchronous pulley 14 to rotate, and the synchronous transmission belt 15 and the second synchronous transmission pulley 16 work together to drive the rotating spindle 12 to rotate. Since it is in a clamped state at this time, when one side of the rotating spindle 12 rotates, the other side of the rotating spindle 12 rotates simultaneously through the drive of the ring-welded workpiece 11, so that the ring-welded workpiece 11 can rotate to the next position. The above process is repeated to spot weld at the next position until one revolution is completed. When the rotating spindle 12 is rotating, the main mounting plate 1701 rotates synchronously under the cooperation of the limiting slide groove 1712 and the limiting strip 1711, and the annular slide groove 1701 rotates synchronously. The cooperation between the groove 1710 and the annular slider 1709 ensures that the connecting rod 1708 does not affect the normal rotation of the main mounting plate 1701. After spot welding is completed, the output end of the third cylinder 1706 retracts, pulling the inner rotating plate 1707 and the connecting rod 1708 towards the side closer to the mounting box 9. Utilizing the annular groove 1710 with its T-shaped internal cross-section, the main mounting plate 1701 is pulled towards the side closer to the mounting box 9. Simultaneously, the output end of the second cylinder 1703 retracts, releasing the clamp on the ring-welded workpiece 11, and moves backward as the main mounting plate 1701 shifts, thus returning to a position after the spot welding location for easier ring welding. During ring welding, the output end of the fourth cylinder 2007 moves downward.The first sliding plate 2006 slides inside the first inner sliding groove 2002, causing the first movable mounting plate 2005 to descend. Then, the second servo motor 2012 is activated, and its output rotation drives the transmission screw 2011 to rotate. This, in conjunction with the fifth slider 2013, causes the second movable mounting plate 2010 and the side mounting plate 2014 to move downwards. At this point, the circumferential welding torch 2016 contacts the area requiring circumferential welding, and simultaneously, the first servo motor 13 is activated, causing the circumferentially welded workpiece 11 to rotate, thus performing circumferential welding on the workpiece 11. After welding, the supporting arc plate 2204 returns to its initial position under the action of the sixth cylinder 2202, receiving the circumferentially welded workpiece 11. The reduction motor 8 is then activated, driving the bidirectional lead screw 6 to rotate in the opposite direction, thereby releasing the clamping and fixing of the circumferentially welded workpiece 11, allowing it to be removed.

[0026] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The installation methods between equipment are also the same as conventional installation methods in the prior art. For example, the two ends of the shaft-shaped parts are connected by bearings, the connection position of the valve component is provided with anti-leakage rubber strips, the outside of the threaded rod or screw is provided with dust cover, and the equipment can be driven by either built-in battery or external power supply. The control method is automatic control by a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, this utility model will not explain the control method and circuit connection in detail. The external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pre-spot welding ring welding machine, comprising a base (1), characterized in that: The base (1) is provided with a sliding mechanism inside. The top of the sliding mechanism is provided with two mounting boxes (9). The two mounting boxes (9) are rotatably connected to a rotating spindle (12). One of the mounting boxes (9) is provided with a driving mechanism. The ends of the two rotating spindles (12) that are close to each other pass through the mounting box (9) and are fixedly installed with a pressure plate (18). The outside of the rotating spindle (12) is provided with a clamping mechanism (17). The top of the two mounting boxes (9) is fixedly installed with a top mounting bracket (19). The outside of the top mounting bracket (19) is provided with a ring welding mechanism (20) and a spot welding mechanism (21). The top of the base (1) is provided with two branch pipe mechanisms (22). The ring welding workpiece (11) is provided above the branch pipe mechanism (22). The ring welding mechanism (20) includes a first fixed mounting plate (2001), which is fixedly mounted on one side of the top mounting bracket (19). The first fixed mounting plate (2001) has a first inner sliding groove (2002) inside. Two second slide rails (2003) are fixedly mounted on one side of the first fixed mounting plate (2001). A third slider (2004) is slidably connected to the outer side of the second slide rails (2003). A third slider (2004) is fixedly mounted on one side of both third sliders (2004). A movable mounting plate (2005) is provided, on one side of which a first sliding plate (2006) is fixedly mounted. The first sliding plate (2006) is inserted into and slidably connected to the interior of a first inner sliding groove (2002). A fourth cylinder (2007) is fixedly mounted on the top of a first fixed mounting plate (2001). The output end of the fourth cylinder (2007) is fixedly connected to the first sliding plate (2006). The side of the first movable mounting plate (2005) away from the third slider (2004) is also provided. A fourth slide rail (2008) is fixedly installed. A fourth slider (2009) is slidably connected to the outer side of the fourth slide rail (2008). A second movable mounting plate (2010) is fixedly installed on the outer sides of several fourth sliders (2009). A fifth slider (2013) is fixedly installed on the side of the second movable mounting plate (2010) near the fourth slider (2009). A second servo motor (2012) is fixedly installed on the top of the first movable mounting plate (2005). The second servo motor (2012) outputs... A transmission screw (2011) is fixedly installed at the outlet end. The transmission screw (2011) is rotatably connected to the first movable mounting plate (2005). The transmission screw (2011) is inserted into the interior of the fifth slider (2013) and threadedly connected to it. A side mounting plate (2014) is fixedly installed on one side of the second movable mounting plate (2010). A ring welding mounting bracket (2015) is fixedly installed at the bottom of the side mounting plate (2014). A ring welding torch (2016) is fixedly installed on one side of the ring welding mounting bracket (2015).

2. The pre-spot welding type ring welding machine according to claim 1, characterized in that: The sliding mechanism includes a bidirectional lead screw (6), which is located inside the base (1) and rotatably connected to it. A first sliding groove (2) is provided on the top of the base (1). Two second sliders (7) are slidably connected inside the first sliding groove (2). A bottom mounting plate (5) is fixedly installed on the top of each of the two second sliders (7). The mounting box (9) is fixedly installed on the top of the bottom mounting plate (5). A reduction motor (8) is fixedly installed on the outside of the base (1). The output end of the reduction motor (8) is fixedly connected to one end of the bidirectional lead screw (6).

3. The pre-spot welding ring welding machine according to claim 1, characterized in that: The drive mechanism includes a first servo motor (13), which is fixedly installed inside one of the mounting boxes (9). A first synchronous pulley (14) is fixedly installed at the output end of the first servo motor (13). A second synchronous transmission pulley (16) is fixedly installed on the outer side of one of the rotating spindles (12). A synchronous transmission belt (15) is provided between the first synchronous pulley (14) and the second synchronous transmission pulley (16). The first synchronous pulley (14) is connected to the second synchronous transmission pulley (16) through the synchronous transmission belt (15). One end of the rotating spindle (12) extends out of the outer side of the mounting box (9) and is fixedly installed with a rotary encoder.

4. A pre-spot welding ring welding machine according to claim 1, characterized in that: The clamping mechanism (17) includes a main mounting plate (1701), which has two limiting grooves (1712) inside. Two limiting strips (1711) are fixedly installed on the outside of the rotating spindle (12). The limiting strips (1711) are located inside the limiting grooves (1712) and are slidably connected to them. An inner rotating disk (1707) is slidably connected on the outside of the rotating spindle (12) and inside the mounting box (9). A connecting rod (1708) is fixedly installed on one side of the main mounting plate (1701). The connecting rod (1708) passes through the mounting box (9) and is fixedly installed with an annular slider (1709). A... There is an annular groove (1710), and the annular slider (1709) is inserted into the annular groove (1710) and slidably connected to it. A third cylinder (1706) is fixedly installed on one side of the inner wall of the mounting box (9). The output end of the third cylinder (1706) is fixedly connected to the inner rotating disk (1707). Two outer mounting brackets (1702) are fixedly installed on the outer side of the main mounting disk (1701). A second cylinder (1703) is fixedly installed on the top and bottom of the outer mounting bracket (1702). A pre-limiting disk (1704) is fixedly installed on the output end of each of the two second cylinders (1703). The pre-limiting disk (1704) has spot welding holes (1705) inside.

5. A pre-spot welding ring welding machine according to claim 1, characterized in that: The spot welding mechanism (21) includes a second fixed mounting plate (2101), which is fixedly mounted on one side of the top mounting bracket (19). Two fifth guide rails (2102) are fixedly mounted on one side of the second fixed mounting plate (2101). A sixth slider (2103) is slidably connected to the outer side of the fifth guide rails (2102). A movable mounting bracket (2104) is fixedly mounted on one side of the two sixth sliders (2103). A second sliding plate (2105) is fixedly mounted on one side of the movable mounting bracket (2104). The interior of the second fixed mounting plate (2101) is opened... There is a second inner groove (2110), the second sliding plate (2105) is inserted into the second inner groove (2110) and slidably connected to it, the top of the second fixed mounting plate (2101) is fixedly mounted with a fifth cylinder (2106), the output end of the fifth cylinder (2106) is fixedly connected to the second sliding plate (2105), the movable mounting bracket (2104) is fixedly mounted with a mounting rod (2107), a spot welding mounting bracket (2108) is fixedly mounted on one side of the mounting rod (2107), and two spot welding guns (2109) are fixedly mounted on one side of the spot welding mounting bracket (2108).

6. A pre-spot welding ring welding machine according to claim 1, characterized in that: The branch pipe mechanism (22) includes a support mounting plate (2201), which is fixedly mounted on the top of the base (1). A sixth cylinder (2202) is fixedly mounted on the top of the support mounting plate (2201). A support mounting bracket (2203) is fixedly mounted on the output end of the sixth cylinder (2202). A support arc plate (2204) is fixedly mounted on one side of the support mounting bracket (2203) by screws.

7. A pre-spot welding ring welding machine according to claim 2, characterized in that: The base (1) has a first slide rail (3) fixedly installed on both sides of the top, and the bottom mounting plate (5) has a first slider (4) fixedly installed on the bottom. The first slide rail (3) and the first slider (4) are slidably connected.

8. A pre-spot welding ring welding machine according to claim 7, characterized in that: A stop mounting bracket (23) is slidably connected to the top of the base (1) and outside the first slide rail (3). A first cylinder (24) is provided inside the stop mounting bracket (23). A stop block (25) is fixedly installed on the top of the base (1).

9. A pre-spot welding ring welding machine according to claim 1, characterized in that: A control box (10) is fixedly mounted on the top of one of the mounting boxes (9).

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