A welding machine for machining castings of reducers for robotic articulated arms

Abstract

This invention discloses a welding machine for processing castings of robot articulated arm reducers, belonging to the field of casting processing technology. It includes a table with a welding arm for welding castings mounted on it. An electric guide rail is mounted on the upper surface of the table, and a movable plate slides along the guide rail. A placement platform for placing the casting is mounted on the upper surface of the movable plate. In this welding machine for processing castings of robot articulated arm reducers, when the casting is placed, the limiting rod moves downward, simultaneously compressing an air bladder. The deformed air bladder can transport the gas stored inside to the interior of an auxiliary box through a connecting pipe. At this time, the second electrical contact piece gradually approaches the first electrical contact piece inside the fixing ring. When the two contact and adhere, the circuit is activated, causing the electromagnetic suction block to become magnetic. The magnetically charged electromagnetic suction block generates a magnetic attraction force on the placed casting. The magnetic attraction force and the mechanical limiting action of the limiting rod work together to form a dual stability guarantee mechanism.

Description

Technical Field

[0001] This invention relates to the field of casting processing technology, specifically a welding machine for processing castings of robot articulated arm reducers. Background Technology

[0002] The machining of robot articulated arm reducer castings is a core part of robot manufacturing. Its quality directly affects the accuracy, lifespan, and reliability of the reducer. When machining the castings, welding machines are often used to weld them to ensure the structural strength, sealing performance, and subsequent machining accuracy of the castings.

[0003] Existing technology 1 (Chinese patent with announcement number CN212350928U and announcement date of 2021-01-15) discloses a welding device for casting processing, including a working platform. Support columns are fixedly connected to the four corners of the lower surface of the working platform. A T-shaped slide rail is fixedly connected to the upper surface of the working platform. A telescopic component is slidably connected to the T-shaped slide rail, and a clamping component is slidably connected to the telescopic component. A first fixing rod is fixedly connected to the upper surface of the working platform, and a second fixing rod is fixedly connected to the right side of the first fixing rod. A welding head is fixedly connected to the right end of the second fixing rod. The clamping component prevents displacement of the casting during welding, thus avoiding changes in the welding position and preventing casting waste. The telescopic component enables precise welding of the casting, facilitates adjustment, saves time, and enables welding of castings of different sizes, improving work efficiency, reducing processing costs, and enhancing practicality.

[0004] There is also prior art 2 (Chinese patent CN117206804A, published on 2023-12-12) which describes a welding device for metal casting processing, including a top plate. A placement plate is provided on the top of the top plate, and limiting structures are provided on both sides of the top of the placement plate. A motor is fixedly connected to the surface of the top plate, and a lead screw is fixedly connected to the output end of the motor. A slider is threadedly connected to the surface of the lead screw, and the top of the slider is fixedly connected to the bottom of the placement plate through a fixing plate. This invention relates to the field of metal casting processing technology. By limiting the metal casting through the limiting structure, displacement can be avoided during welding, thus preventing it from affecting the welding effect. The placement plate as a whole can move under the drive of the motor, replacing the manual welding method. The electric control can improve the flatness and stability of the welding, thereby improving the welding effect. The limiting structure can be adjusted in position to adapt to metal castings of different sizes, and has a wide range of applications.

[0005] While existing technologies can prevent workpiece displacement during welding, their limiting structures are mostly simple and can only use one method to limit the workpiece. When the shape of the workpiece changes, a single form of limiting will not be able to stably limit the workpiece, which has certain limitations.

[0006] Therefore, we propose a welding machine for machining the castings of robot articulated arm reducers in order to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a welding machine for processing castings of reducers for robot articulated arms, in order to solve the problem that most of the current limiting structures on the market are relatively simple and can only use one method to limit the workpiece. When the shape of the workpiece changes, the single form of limiting will not be able to stably limit the workpiece, which has certain limitations.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a welding machine for processing castings of robot articulated arm reducers, comprising a table, a welding arm for welding castings is provided on the table, an electric guide rail is provided on the upper surface of the table, a movable plate is slidably provided on the electric guide rail, and a placement platform for placing castings is provided on the upper surface of the movable plate. A limiting rod for limiting the castings is slidably connected to the upper surface of the placement platform. An auxiliary box is fixedly connected to the upper surface of the movable plate, and a reinforcing mechanism is provided inside the auxiliary box. The reinforcing mechanism achieves strong limiting of the castings by the movement of the limiting rod. A fixed frame is fixedly connected to the side of the auxiliary box, and a monitoring instrument for monitoring the welding effect is fixedly connected to the fixed frame. A protective mechanism is provided on the fixed frame, and the protective mechanism achieves synchronous operation of the monitoring operation of the monitoring instrument by activating the reinforcing mechanism.

[0009] Preferably, the limiting rods are arranged in a rectangular array about the placement platform, and a first spring is fixedly connected between the lower end of the limiting rod and the lower surface of the placement platform, and the limiting rod and the placement platform form an elastic structure through the first spring.

[0010] Preferably, the reinforcing mechanism includes an electromagnetic suction block, which is fixedly connected to the upper end of the limiting rod. An airbag is fixedly connected to the center of the upper surface of the moving plate, and the size of the airbag is the same as the distribution range of the limiting rod. A connecting pipe is provided through the periphery of the airbag, and the other end of the connecting pipe is connected to the auxiliary box.

[0011] Preferably, an adjustment plate is slidably connected inside the auxiliary box. The adjustment plate slides along the inside of the auxiliary box under the action of gas inside the airbag. A second spring is fixedly connected between the adjustment plate and the inner wall of the auxiliary box, and an adjustment rod is fixedly connected to the adjustment plate.

[0012] Preferably, the adjusting rod is slidably connected to the outer side wall of the auxiliary box, and the outer side wall of the auxiliary box is fixedly connected to a fixing ring that communicates with the auxiliary box. The first electrical contact piece is fixedly connected inside the fixing ring, and the first electrical contact piece is electrically connected to the electromagnetic suction block.

[0013] Preferably, a second electrical contact piece is fixedly connected to the outer side of the adjusting rod. When the casting is not placed on the placement platform, the first electrical contact piece and the second electrical contact piece do not contact each other, and the second electrical contact piece is adjacent to the first electrical contact piece.

[0014] Preferably, the protective mechanism includes a linkage rod, which is fixedly connected to the outer end of the adjusting rod and is arranged in an inverted "L" shape. Furthermore, an abutment rod is fixedly connected to the upper end of the linkage rod and is arranged in a "V" shape.

[0015] Preferably, a limiting groove is provided on the upper side of the fixing frame, and an abutment rod is slidably connected inside the limiting groove, and a protective plate for protecting the front side of the monitor is fixedly connected to the lower end of the abutment rod.

[0016] Preferably, the inner side of the abutment rod is provided with an abutment groove, and the abutment groove is arranged in an inclined structure, and the upper end of the abutment rod is slidably connected to the inside of the abutment groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The welding arm and the electric guide rail work together. Through the precise cooperation mechanism between the two, the multi-angle welding operation of the casting is achieved, which effectively improves the welding quality and effect of the casting. When the casting is placed on the platform, under the action of the casting's own weight, some of the limiting rods can slide down adaptively according to the actual shape and size of the casting. Through the unmoved side limiting rods, the casting can be effectively blocked and limited to prevent it from shifting during the welding process. Through the movement state of the limiting rods, the castings of different shapes and sizes can be effectively fixed, thereby ensuring the stability of the castings in the subsequent welding process and providing a reliable guarantee for high-quality welding.

[0019] (2) A first spring is provided at the lower end of the limiting rod. When the casting is placed, causing the limiting rod to move down, the lower end of the limiting rod will pull the first spring to undergo elastic deformation. After the casting is welded and processed, the casting is removed. Driven by the elastic force of the first spring, the limiting rod can move upward to reset, thereby restoring multiple sets of limiting rods to their original state, which is convenient for subsequent processing of the workpiece.

[0020] (3) When the casting is placed, the limiting rod moves down and the airbag is squeezed synchronously, causing the airbag to deform. The deformed airbag can transport the gas stored inside to the inside of the auxiliary box through the connecting pipe. At this time, the second electrical contact piece will gradually approach the first electrical contact piece set inside the fixing ring. When the two are in contact and attached, the circuit is turned on and the electromagnetic suction block carries magnetism. The electromagnetic suction block carrying magnetism generates magnetic attraction force on the placed casting. The magnetic attraction force and the mechanical limiting action of the limiting rod cooperate with each other to form a dual stability guarantee mechanism.

[0021] (4) When the equipment is not in use, the two sets of protective plates will automatically close to provide reliable protection for the front end of the monitor. In the closed state, the protective plates can effectively block external collisions and scratches, and prevent dust, water vapor and other substances from entering the monitor.

[0022] (5) When the adjusting rod moves outward, it can simultaneously drive the linkage rod to move outward. At this time, the linkage rod can drive the contact plate to move outward synchronously. At the same time, under the action of the contact plate, the contact rod can make the protective plate move to both sides, so as not to block the monitoring instrument. The protective plate will automatically open after the casting is placed, so that the monitoring instrument can monitor the processing of the casting and further improve the welding efficiency. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the placement platform of the present invention;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the limiting rod of the present invention;

[0026] Figure 4 This is a three-dimensional cross-sectional view of the auxiliary box of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the airbag of the present invention;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the monitoring device of the present invention;

[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the fixing ring of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the protective plate in its closed state according to the present invention;

[0032] Figure 10 This is a three-dimensional structural diagram of the protective plate of the present invention in the open state;

[0033] Figure 11 This is a schematic diagram of the electrical contact structure between the electromagnetic suction block and the first electrical contact piece of the present invention.

[0034] In the diagram: 1. Tabletop; 2. Welding arm; 3. Electric guide rail; 4. Moving plate; 5. Placement platform; 6. Limiting rod; 7. Electromagnetic suction block; 8. Fixing frame; 9. Auxiliary box; 10. First spring; 11. Airbag; 12. Connecting pipe; 13. Adjusting plate; 14. Adjusting rod; 15. Fixing ring; 16. First electrical contact piece; 17. Second electrical contact piece; 18. Monitoring instrument; 19. Protective plate; 20. Abutment groove; 21. Limiting groove; 22. Abutment plate; 23. Linkage rod; 24. Abutment rod; 25. Second spring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: To improve the stability of castings during welding, a downward sliding limiting rod 6 is provided. The movement of the limiting rod 6 limits the castings of different models, such as... Figures 1-4 The present invention provides the following technical solution: a welding machine for processing castings of robot articulated arm reducers, comprising: a welding arm 2 for welding castings is provided on a table 1, an electric guide rail 3 is provided on the upper surface of the table 1, a moving plate 4 is slidably provided on the electric guide rail 3, and a placement platform 5 for placing castings is provided on the upper surface of the moving plate 4. A limiting rod 6 for limiting the castings is slidably connected to the upper surface of the placement platform 5. An auxiliary box 9 is fixedly connected to the upper surface of the moving plate 4. The limiting rods 6 are arranged in a rectangular array about the placement platform 5, and a first spring 10 is fixedly connected between the lower end of the limiting rod 6 and the lower surface of the placement platform 5. The limiting rods 6 and the placement platform 5 form an elastic structure through the first spring 10.

[0037] Welding arm 2 and electric guide rail 3 work together to complete multi-angle welding of the casting. Through their tacit cooperation, welding arm 2 can flexibly adjust the welding angle and position to achieve uniform welding of various parts of the casting, thereby effectively improving the welding effect and reducing welding defects. In the casting placement stage, when the casting is placed above the placement table 5, it will first contact the limiting rod 6. Under the action of the casting's gravity, the limiting rod 6 will slide downward along a specific direction and make corresponding adjustments according to the shape and size of the casting to adapt to the contour of the casting. At the same time, the side limiting rods 6, since they are not directly pressured by the casting, will not move downward. The side limiting rods 6 can block and limit the casting, thereby restricting the horizontal movement of the casting and ensuring that the casting is accurately positioned on the placement table 5. The movable limiting rods 6 can adapt to castings of different shapes and sizes. This design significantly improves the versatility and flexibility of the welding equipment, while also ensuring that the castings do not shake or shift during subsequent welding operations, thus guaranteeing the stability and reliability of the welding quality. During the placement of the casting, when the casting contacts the limiting rod 6 and moves downward, the lower end of the limiting rod 6 precisely applies tension to the first spring 10, causing the first spring 10 to undergo elastic deformation. After the casting completes the welding process, it is removed from the working area. At this time, the elastic potential energy stored in the first spring 10 begins to be released. Driven by the elastic force, the limiting rod 6 moves upward until it returns to its initial position. This reset process ensures that multiple sets of limiting rods 6 synchronously return to their original neat state, thereby ensuring the consistency of the equipment's state after each processing, improving the equipment's versatility and reusability, and providing a strong guarantee for efficient and precise processing of different workpieces in the future.

[0038] Example 2: To further improve the stability of the casting after placement, an electromagnetic chuck 7 is provided. The electromagnetic chuck 7 uses its adsorption effect to hold and limit the casting, ensuring that the casting does not shift position. Figure 4 , Figure 5 , Figure 6 and Figure 11The present invention provides the following technical solution: a welding machine for processing castings of robot articulated arm reducers, comprising: a reinforcing mechanism provided inside the auxiliary box 9, the reinforcing mechanism achieving strong limiting of the casting by the movement of the limiting rod 6, the reinforcing mechanism including an electromagnetic suction block 7 fixedly connected to the upper end of the limiting rod 6, an airbag 11 fixedly connected at the center of the upper surface of the moving plate 4, the size of the airbag 11 being the same as the distribution range of the limiting rod 6, and a connecting pipe 12 being provided through the periphery of the airbag 11, the other end of the connecting pipe 12 being connected to the auxiliary box 9, an adjusting plate 13 being slidably connected inside the auxiliary box 9, the adjusting plate 13 being activated by the gas inside the airbag 11 The adjustment plate 13 slides along the inside of the auxiliary box 9, and a second spring 25 is fixedly connected between the adjustment plate 13 and the inner wall of the auxiliary box 9. An adjustment rod 14 is fixedly connected to the adjustment plate 13, and the adjustment rod 14 is slidably connected to the outer wall of the auxiliary box 9. A fixing ring 15 connected to the auxiliary box 9 is fixedly connected to the outer wall of the auxiliary box 9, and a first electrical contact piece 16 is fixedly connected inside the fixing ring 15. The first electrical contact piece 16 is electrically connected to the electromagnetic suction block 7. A second electrical contact piece 17 is fixedly connected to the outer side of the adjustment rod 14. When the casting is not placed on the placement platform 5, the first electrical contact piece 16 and the second electrical contact piece 17 do not contact each other, and the second electrical contact piece 17 is adjacent to the first electrical contact piece 16.

[0039] When the casting contacts the limiting rod 6 and causes it to move downward, the downward-moving limiting rod 6 simultaneously applies pressure to the airbag 11, causing it to deform in a controllable manner. After being compressed, the gas stored inside the airbag 11 can be directionally transported to the auxiliary box 9 through the connecting pipe 12. As the gas continuously flows in, the air pressure inside the auxiliary box 9 gradually increases. Under the action of the air pressure, the adjusting plate 13, which is slidably set inside the auxiliary box 9, begins to slide outward smoothly. The adjusting rod 14 slides outward under the drive of the adjusting plate 13. When it slides to a specific position, the second electrical contact piece 17 set on its outer side contacts the fixing ring 1. The first electrical contact piece 16 inside the 5 is precisely in contact with the electromagnetic block 7. When the two are in contact, the circuit is turned on and the current flows into the electromagnetic block 7 through the first electrical contact piece 16. At this time, the electromagnetic block 7 generates a magnetic field under the action of the current, which generates a magnetic attraction force on the placed casting. This attraction force works together with the mechanical limiting action of the limiting rod 6 to form a double stability guarantee, which greatly improves the stability of the casting placement and ensures that the casting will not shift even if it is subjected to external forces such as vibration and impact during the subsequent welding process, thereby ensuring the accuracy and quality of the welding process.

[0040] Example 3: A monitoring device 18 is installed to monitor the welding operation. A protective mechanism is also installed to protect the monitoring device 18 when not in use, such as... Figures 7-10The present invention provides the following technical solution: a welding machine for processing castings of robot articulated arm reducers, comprising: a fixed frame 8 fixedly connected to the side of the auxiliary box 9, and a monitoring instrument 18 for monitoring the welding effect fixedly connected to the fixed frame 8; and a protective mechanism provided on the fixed frame 8, the protective mechanism achieving synchronous operation of the monitoring operation of the monitoring instrument 18 by activating the reinforcing mechanism; the protective mechanism includes a linkage rod 23, the linkage rod 23 being fixedly connected to the outer end of the adjusting rod 14, and the linkage rod 23 being in a certain position. The device has an inverted "L" shaped structure, and the upper end of the linkage rod 23 is fixedly connected to the abutment rod 24, which is also "V" shaped. The upper side of the fixing frame 8 has a limit groove 21, and the abutment rod 24 is slidably connected inside the limit groove 21. The lower end of the abutment rod 24 is fixedly connected to a protective plate 19 for protecting the front of the monitor 18. The inner side of the abutment rod 24 has an abutment groove 20, which is inclined. The upper end of the abutment rod 24 is slidably connected inside the abutment groove 20.

[0041] The monitoring device 18 is installed on the side of the auxiliary box 9. The monitoring device 18 can monitor the welding operation, thereby ensuring the welding quality of the castings. When the equipment is not in use, the two sets of protective plates 19 are in a closed state, protecting the front end of the monitoring device 18 from damage and preventing subsequent monitoring operations from being interrupted. When the adjusting rod 14 moves outward, it simultaneously drives the linkage rod 23 outward. During the movement, the linkage rod 23 pulls the contact plate 22 outward simultaneously. At this time, the contact plate 22... The inclined contact groove 20 inside the device will contact the contact rod 24 and generate a contacting effect. Guided by the inclined surface of the contact groove 20, the contact rod 24 will slide steadily and accurately along the limiting groove 21. As the contact rod 24 slides, it will drive the protective plates 19 on both sides to unfold outward, thereby removing the obstruction to the monitor 18 and putting it in an unobstructed monitoring state. This process is automatically completed after the casting is placed, ensuring that the monitor 18 can monitor the casting processing process in real time and clearly, effectively improving welding efficiency.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding machine for processing robot joint arm reducer castings, comprising a table top (1), a welding arm (2) for welding the castings is arranged on the table top (1), and an electric guide rail (3) is arranged on the upper surface of the table top (1), a moving plate (4) is slidably arranged on the electric guide rail (3), and a placing table (5) for placing the castings is arranged on the upper surface of the moving plate (4), characterized in that, The upper surface of the placement table (5) is slidably connected with a limiting rod (6) for limiting the casting, the upper surface of the moving plate (4) is fixedly connected with an auxiliary box (9), the inside of the auxiliary box (9) is provided with a reinforcing mechanism, the reinforcing mechanism realizes the strong limiting of the casting by the movement of the limiting rod (6), the side of the auxiliary box (9) is fixedly connected with a fixed frame (8), the fixed frame (8) is fixedly connected with a monitoring instrument (18) for monitoring the welding effect, and the fixed frame (8) is provided with a protection mechanism, the protection mechanism realizes the synchronous operation of the monitoring operation of the monitoring instrument (18) by the starting of the reinforcing mechanism. The reinforcing mechanism comprises an electromagnetic suction block (7), the electromagnetic suction block (7) is fixedly connected to the upper end of the limiting rod (6), the upper surface of the moving plate (4) is fixedly connected with an air bag (11) at the center, the size of the air bag (11) is the same as the distribution range of the limiting rod (6), the periphery of the air bag (11) is provided with a communication pipe (12) penetrating through, the other end of the communication pipe (12) is communicated with the auxiliary box (9), the inside of the auxiliary box (9) is slidably connected with an adjusting plate (13), the adjusting plate (13) slides in the inside of the auxiliary box (9) under the action of the gas in the air bag (11), the second spring (25) is fixedly connected between the adjusting plate (13) and the inner wall of the auxiliary box (9), the adjusting rod (14) is fixedly connected to the adjusting plate (13), the adjusting rod (14) is slidably connected to the outer side wall of the auxiliary box (9), the outer side wall of the auxiliary box (9) is fixedly connected with a fixed ring (15) communicated with the auxiliary box (9), the first electric contact piece (16) is fixedly connected to the inside of the fixed ring (15), the first electric contact piece (16) is electrically connected with the electromagnetic suction block (7), the second electric contact piece (17) is fixedly connected to the outside of the adjusting rod (14), when the placement table (5) is not placed with the casting, the first electric contact piece (16) is not in contact with the second electric contact piece (17), and the second electric contact piece (17) is adjacent to the first electric contact piece (16).

2. The robot joint arm reduction gear casting machining welding machine according to claim 1, characterized in that: The limiting rod (6) is arranged in a rectangular array about the placement table (5), the lower end of the limiting rod (6) is fixedly connected with the first spring (10) between the lower surface of the placement table (5), and the limiting rod (6) and the placement table (5) constitute an elastic structure through the first spring (10).

3. The robot joint arm reduction gear casting machining welding machine according to claim 2, characterized in that: The protection mechanism comprises a linkage rod (23), the linkage rod (23) is fixedly connected to the outer end of the adjusting rod (14), the linkage rod (23) is arranged in an inverted "L" shape, and the upper end of the linkage rod (23) is fixedly connected with a resisting rod (24), and the resisting rod (24) is arranged in a "V" shape.

4. The robot joint arm reduction gear casting machining welding machine according to claim 3, characterized in that: The upper side of the fixed frame (8) is provided with a limiting groove (21), the inside of the limiting groove (21) is slidably connected with the resisting rod (24), and the lower end of the resisting rod (24) is fixedly connected with a protection plate (19) for protecting the front side of the monitoring instrument (18).

5. The robot joint arm reduction gear casting machining welding machine according to claim 4, characterized in that: The inner side of the abutting rod (24) is provided with an abutting groove (20), and the abutting groove (20) is arranged in an inclined structure, and the upper end of the abutting rod (24) is slidingly connected in the inside of the abutting groove (20).

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