Combined welding device for three metal parts

Abstract

The invention discloses a combined welding device for three metal parts. The combined welding device comprises a driving rotating mechanism, a driven rotating mechanism, a part adsorption mechanism and a pressing mechanism. The center line of the driving rotating mechanism and the center line of the driven rotating mechanism are located on the same axis, the bottom end of the driving rotating mechanism is fixedly connected to the upper end face of the working machine table, the driven rotating mechanism comprises an adaptive tool and a driven fixing support, the cross section of the adaptive tool is circular, and the driven fixing support is fixedly connected to the upper end face of the working machine table. The driven fixing support is provided with a mounting hole penetrating in the horizontal direction, the adaptive tool is arranged in the mounting hole and rotationally connected with the driven fixing support, the bottom end of the driven fixing support is fixedly connected with a movable sliding block, and the movable sliding block is slidably connected with a movable guide rail. The movable guide rail is fixed to the upper end face of the working machine table. The technical problems that in the technical field of combined welding, three workpieces are difficult to weld, and the welding quality is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of combined welding, and in particular to a combined welding device for three metal parts. Background Art

[0002] As a key manufacturing process, welding plays an indispensable role in industrial production. It is mainly used to permanently fix parts of metal or other materials together. Welding technology has a wide range of applications, from small parts of daily necessities to large building structures and heavy machinery. Different welding application scenarios have different requirements for welding technology, but no matter in which field, the quality of welding will directly affect the overall performance and service life of the product.

[0003] Already assembled components, that is, these components have been positioned and fixed in the correct position before welding so that the welder can weld accurately on the joint surface. However, another common situation is to place two parts that have not yet been assembled together directly for welding. In this case, additional fixtures or supports are required to ensure that the parts maintain the correct relative position during the welding process to avoid welding defects caused by movement.

[0004] When three or more parts that are not pre-assembled are involved, the complexity and challenges of the welding process increase significantly. First, positioning multiple parts to achieve the ideal contact surface is a huge challenge, because each part needs to be precisely placed and fixed to ensure that all seams can obtain uniform and consistent welding. This means that high-precision positioning devices and complex fixture systems are required to ensure that the position and angle of each part in three-dimensional space meet the design requirements. Any slight deviation may cause the entire structure to be asymmetric or unstable. Secondly, in a mass production environment, the consistency and repeatability of this multi-part welding are very high. Any slight change may cause fluctuations in the quality of the finished product. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a three-metal parts combined welding device to solve the technical problems of difficulty in welding three workpieces and poor welding quality in the field of combined welding technology.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides a three-metal parts combined welding device, comprising:

[0007] Active rotating mechanism, driven rotating mechanism, parts adsorption mechanism and clamping mechanism. The center lines of the active rotating mechanism and the driven rotating mechanism are on the same axis, and the structure includes an adapting tool and a driven fixed bracket. The cross section of the adapting tool is circular, and the driven fixed bracket is provided with a mounting hole penetrating in the horizontal direction. The adapting tool is built-in and rotatably connected with the mounting hole and the driven fixed bracket. The bottom end of the fixed bracket is fixedly connected with a moving slider, and the moving slider is slidably connected with a moving guide rail, and the moving guide rail is fixed to the upper end surface of the working machine.

[0008] Compared with the prior art, the beneficial effects of the present invention include:

[0009] 1. Multi-station synchronous work: welding three workpieces at the same time, greatly improving production efficiency and shortening production cycle.

[0010] 2. Ensure welding quality: Since welding parameters and process flow can be uniformly set and controlled, the welding quality of each workpiece is ensured to be consistent and the influence of human factors is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view structural schematic diagram of the three metal parts combined welding device provided by the present invention when not welded;

[0012] Figure 2 It is a front view structural schematic diagram of the three metal parts combined welding device provided by the present invention during welding;

[0013] Figure 3 It is a schematic diagram of the top view of the structure of the three metal parts combined welding device provided by the present invention;

[0014] Figure 4 It is a schematic cross-sectional structural diagram of an adaptor tool in a three-metal parts combined welding device provided by the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0018] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 This embodiment provides a three-metal parts combined welding device, including: an active rotating mechanism 1, a driven rotating mechanism 2, a parts adsorption mechanism 3 and a clamping mechanism 4.

[0019] In this embodiment, the first part 5 and the second part 6 are both punched hollow cylinders, the second part 6 has through holes 6a around its periphery, and the third part 7 is a circular solid sheet.

[0020] Furthermore, the center lines of the active rotating mechanism 1 and the driven rotating mechanism 2 are on the same axis, and the bottom end of the active rotating mechanism 1 is fixedly connected to the upper end surface of the working machine 8 .

[0021] Furthermore, the active rotating mechanism 1 adopts the existing technology - machine tool chuck. The machine tool chuck is an important component used to fix the workpiece on the machine tool to ensure that the workpiece can be stable and immobile during the processing. The chuck usually consists of the following main parts: a main body, a clamping jaw, a driving mechanism, a locking device and an adjusting mechanism. The main body of the chuck is a cylindrical structure with internal or external threads, which is used to connect to the main shaft of the machine tool; the clamping jaw is a movable part on the chuck, which is responsible for directly contacting and clamping the workpiece. According to different needs, the clamping jaw can be a straight jaw that moves radially or a helical jaw that moves along a spiral line; the driving mechanism includes mechanical parts such as a worm and a gear to convert the rotational motion into the linear motion of the clamping jaw, thereby clamping or loosening the workpiece; the locking device is used to fix the position of the clamping jaw to prevent the clamping jaw from loosening due to vibration and other reasons during the processing; the adjusting mechanism allows the user to adjust the position of the clamping jaw to adapt to workpieces of different sizes and shapes.

[0022] Furthermore, the clamping jaws have high machining accuracy consistency requirements, and the circumferential and radial runouts of the parts after clamping must be within a very small range, usually within 0.15 mm. Standard parts can be used for runout detection, and the standard parts are the same size as the first part 5, and the overall dimensional accuracy is controlled within 0.01 mm.

[0023] Furthermore, the driven rotating mechanism 2 includes an adapting fixture 21 and a driven fixed bracket 22. The cross section of the adapting fixture 21 is circular, the driven fixed bracket 22 is provided with a mounting hole penetrating in the horizontal direction, the adapting fixture 21 is built into the mounting hole and is rotatably connected to the driven fixed bracket 22, the bottom end of the driven fixed bracket 22 is fixedly connected with a moving slider 23, the moving slider 23 is slidably connected with a moving guide rail 24, and the moving guide rail 24 is fixed to the upper end surface of the working machine 8.

[0024] Furthermore, a bearing is provided between the adapting fixture 21 and the driven fixing bracket 22 for rotational connection between the adapting fixture 21 and the driven fixing bracket 22 .

[0025] Furthermore, the movable guide rail 24 and the movable slider 23 are used for the horizontal movement of the driven rotating mechanism 2 , so that the driven rotating mechanism 2 moves away from or close to the active rotating mechanism 1 .

[0026] Furthermore, the design of the movable guide rail 24 and the movable slider 23 can ensure that the driven rotating mechanism 2 performs very smooth and precise linear motion along a predetermined path. For the welding process, the active rotating mechanism 1 and the driven rotating mechanism 2 require high positioning accuracy, and the selection of the movable guide rail 24 and the movable slider 23 is particularly important. The movable guide rail 24 and the movable slider 23 are made of high-quality materials with good wear resistance, and their surfaces are treated with special surface treatment technology (such as plating, hardening treatment), which further enhances their durability and service life.

[0027] Furthermore, the adaptor 21 is provided with an adsorption groove 211 and a gas circulation channel 212 in the horizontal direction, the adsorption groove is connected to the gas circulation channel, the cross-sectional diameter of the gas circulation channel is smaller than the cross-sectional diameter of the adsorption groove, and the adsorption groove and the gas circulation channel pass through the adaptor.

[0028] Furthermore, the adsorption groove 211 includes a limit section 2111, an expansion section 2112 and a main section 2113 which are interconnected. The cross-sectional diameter of the limit section 2111 is equal to the outer diameter of the second part 6, and the cross-sectional diameter of the expansion section 2112 gradually increases in the horizontal direction to the cross-sectional diameter of the main section 2113.

[0029] Furthermore, the designs of the limiting section 2111 , the expansion section 2112 , and the main section 2113 minimize the internal air-avoiding space of the adapter tooling 21 , thereby reducing the power requirement of the vacuum generator 32 in the part adsorption mechanism 3 .

[0030] Furthermore, the inner diameter of the adapting fixture 21 of the driven rotating mechanism 2 is designed according to the outer diameter of the second part 6, ensuring that the second part 6 does not shake obviously up and down after being inserted, and ensuring that the flange part of the second part 6 cannot be entered.

[0031] Furthermore, the flatness and roughness of the end face of the adapting fixture 21 need to ensure that the flange surface of the second part 6 fits tightly after being placed.

[0032] Furthermore, the part adsorption mechanism 3 includes a rotary joint 31 and a vacuum generator 32 .

[0033] Furthermore, the vacuum generator 32 is a device that uses compressed air to generate vacuum, and is widely used in the fields of automated production, packaging, semiconductor manufacturing, etc. Its working principle is based on the Venturi effect, that is, the phenomenon that the speed of a fluid increases and the pressure decreases when it passes through a narrow area.

[0034] Furthermore, the fixed end of the vacuum generator 32 is fixedly arranged on the end surface of the working machine 8, the output end of the vacuum generator 32 is connected to the air pipe 33, the end of the air pipe 33 away from the vacuum generator 32 is connected to the rotary joint 31, and the end of the rotary joint 31 away from the vacuum generator 32 is connected to the gas flow channel 212 of the adapter tooling 21.

[0035] Furthermore, the second part 6 is barrel-shaped; a through hole 6a is provided on the second part 6; and the third part 7 is pancake-shaped.

[0036] Furthermore, when welding the first part 5, the second part 6 and the third part 7, the vacuum generator 32 is first started to connect the adsorption groove 211 with the gas flow channel 212 for vacuum treatment. When the vacuum generator 32 is in working state, the second part 6 is placed in the adsorption groove 211. Since a through hole 6a is provided on the second part 6, a certain negative pressure is generated at the entrance of the second part 6 under the action of the vacuum generator 32. Secondly, the third part 7 is placed close to the entrance of the second part 6. Under the condition of negative pressure, the third part 7 is adsorbed on the second part 6.

[0037] Furthermore, the clamping mechanism 4 includes a clamping drive source 41, a buffer bracket 42 and a buffer unit 43. The fixed end of the clamping drive source 41 is arranged on the upper end surface of the working machine 8. The working machine 8 is located on the side of the driven rotating mechanism 2 away from the active rotating mechanism 1. The output end of the clamping drive source 41 is fixedly connected to a clamping block 44.

[0038] Furthermore, the clamping drive source 41 is used to drive the driven rotating mechanism 2 away from or close to the active rotating mechanism 1, one end of the output shaft of the clamping drive source 41 is fixedly connected to the clamping block 44, and the clamping block 44 is fixedly connected to one side of the driven fixed bracket 22. When the output shaft of the clamping drive source 41 is extended, the driven rotating mechanism 2 is driven to move toward the active rotating mechanism 1; when the output shaft of the clamping drive source 41 is shortened, the driven rotating mechanism 2 is driven to move away from the active rotating mechanism 1.

[0039] Furthermore, the clamping drive source 41 is a pneumatic drive source, which has the following advantages in this embodiment: 1. Strong explosion-proof performance: the pneumatic system will not generate electric sparks, so it is safer to use in flammable and explosive environments; 2. Fast start-up: the pneumatic system can start and stop instantly, and the response speed is fast; 3. Large output torque: the pneumatic system can provide greater thrust and torque, suitable for heavy-load operations.

[0040] Furthermore, the bottom end of the buffer bracket 42 is fixedly arranged on the upper end surface of the working machine 8, the buffer bracket 42 is arranged on the side of the driven rotating mechanism 2 close to the active rotating mechanism 1, and the upper end of the buffer bracket 42 is provided with the buffer unit 43. When welding work is performed, the output end of the buffer unit 43 abuts against one side of the driven fixed bracket 22.

[0041] Furthermore, the buffer unit 43 uses a hydraulic buffer. In this embodiment, the hydraulic buffer has the following advantages: good buffering effect: the hydraulic buffer can effectively absorb and disperse the impact energy, reduce the impact and vibration of the mechanical equipment, and extend the service life of the equipment. By controlling the flow of hydraulic oil, the hydraulic buffer can achieve a smooth deceleration process and avoid the impact caused by sudden stop; high stability: the physical properties of the hydraulic oil are less affected by temperature, and the hydraulic buffer can maintain stable performance under different temperature environments. The hydraulic buffer is usually made of corrosion-resistant materials and can work normally in a humid or dusty environment.

[0042] Furthermore, the buffer unit 43 also has a limiting function. When the buffering effect of the buffer unit 43 reaches its limit, the clamping drive source 41 pushes the driven rotating mechanism 2 to move toward the active rotating mechanism 1 to reach the working position, and further movement is limited. In the working position, the first part 5, the second part 6 and the third part 7 can be just in close contact.

[0043] Working principle: The three metal parts combined welding devices provided by the invention include: an active rotating mechanism 1, a driven rotating mechanism 2, a parts adsorption mechanism 3 and a clamping mechanism 4. The driven rotating mechanism 2 includes an adaptor 21 and a driven fixed bracket 22. The cross section of the adaptor 21 is circular, and the driven fixed bracket 22 is provided with a mounting hole that runs through in the horizontal direction. The adaptor 21 is built into the mounting hole and is rotatably connected to the driven fixed bracket 22. The bottom end of the driven fixed bracket 22 is fixedly connected with a moving slider 23, and the moving slider 23 is slidably connected with a moving guide rail 24, and the moving guide rail 24 is fixed to the upper end surface of the working machine 8. A bearing is provided between the adaptor 21 and the driven fixed bracket 22 for the rotational connection between the adaptor 21 and the driven fixed bracket 22. The moving guide rail 24 and the moving slider 23 are used for the horizontal movement of the driven rotating mechanism 2, so that the driven rotating mechanism 2 is away from or close to the active rotating mechanism 1.

[0044] Specifically, when welding the first part 5, the second part 6 and the third part 7, the vacuum generator 32 works to provide vacuum suction. First, after the second part 6 is placed in the adsorption groove 211, the third part 7 is placed on the surface of the second part 6, and the two are adsorbed and fixed under negative pressure conditions; secondly, the first part 5 is fixed by using the claws, and the clamping drive source 41 is started to push the driven rotating mechanism 2 to move toward the active rotating mechanism 1 to reach the working position, so that the first part 5, the second part 6 and the third part 7 can be just close to each other; finally, the active rotating mechanism 1 is started to drive the first part 5, the second part 6 and the third part 7 to rotate together, and welding is performed under the laser welding gun 9.

[0045] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A three-metal parts combined welding device, used for welding a first part, a second part and a third part; characterized in that: include: An active rotating mechanism, a driven rotating mechanism, a parts adsorption mechanism and a pressing mechanism; the center lines of the active rotating mechanism and the driven rotating mechanism are on the same axis; The bottom end of the active rotating mechanism is fixedly connected to the upper end surface of the working machine; the driven rotating mechanism includes an adapting tooling and a driven fixed bracket; the cross-section of the adapting tooling is circular; the driven fixed bracket is provided with a mounting hole that passes through in the horizontal direction; the adapting tooling is built into the mounting hole and is rotatably connected to the driven fixed bracket; the bottom end of the driven fixed bracket is fixedly connected to a moving slider; the moving slider is slidably connected to a moving guide rail; the moving guide rail is fixed to the upper end surface of the working machine.

2. The three metal parts combined welding device according to claim 1 is characterized in that: The adapting tooling is provided with an adsorption groove and a gas circulation channel in the horizontal direction; the adsorption groove is connected with the gas circulation channel; the cross-sectional diameter of the gas circulation channel is smaller than the cross-sectional diameter of the adsorption groove; the adsorption groove and the gas circulation channel pass through the adapting tooling.

3. The three metal parts combined welding device according to claim 2 is characterized in that: The adsorption groove includes a limiting section, an expansion section and a main section which are interconnected; the cross-sectional diameter of the limiting section is equal to the outer diameter of the second part; the cross-sectional diameter of the expansion section gradually increases in the horizontal direction to the cross-sectional diameter of the main section.

4. The three metal parts combined welding device according to claim 3 is characterized in that: The parts adsorption mechanism includes a rotary joint and a vacuum generator; the fixed end of the vacuum generator is fixedly arranged on the end surface of the working machine; the output end of the vacuum generator is connected to the air pipe; the end of the air pipe away from the vacuum generator is connected to the rotary joint; the end of the rotary joint away from the vacuum generator is connected to the gas flow channel of the adapter tooling.

5. The three metal parts combined welding device according to claim 4 is characterized in that: The clamping mechanism includes a clamping drive source, a buffer bracket and a buffer unit; the fixed end of the clamping drive source is arranged at the upper end of the working machine; the working machine is located on the side of the driven rotating mechanism away from the active rotating mechanism; the output end of the clamping drive source is fixedly connected to a clamping block.

6. The three metal parts combined welding device according to claim 5 is characterized in that: The bottom end of the buffer bracket is fixedly arranged on the upper end surface of the working machine; the buffer bracket is arranged on the side of the driven rotating mechanism close to the active rotating mechanism; the buffer unit is arranged on the upper end of the buffer bracket; when welding work is performed, the output end of the buffer unit abuts against one side of the driven fixed bracket.

7. The three metal parts combined welding device according to claim 6 is characterized in that: The second part is barrel-shaped; a through hole is formed on the second part; and the third part is pancake-shaped.

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