Automatic assembling and welding device for sensor assembly

Abstract

The invention belongs to the technical field of sensor assembly welding and discloses an automatic sensor assembly assembling and welding device which comprises a machine body, a supporting component is arranged on the right side of a driving box and comprises a fixing seat fixedly connected to the output end of the driving box, and electric push rods are fixedly connected to the front side and the rear side of the interior of the fixing seat. According to the welding device for the sensor shell, the reinforcing ribs are arranged to promote air circulation in the welding process of the sensor shell, heat loss is accelerated, and the influence of thermal stress on the shell structure is reduced; the honeycomb-shaped grid structure serves as a centrifugal fan blade in the rotating process, air in the shell is forcibly stirred to form turbulent flow, shell materials can be rapidly heated and cooled, uneven thermal expansion and thermal stress accumulation of metal materials can be caused, the influence of thermal stress on the shell structure is reduced, and the service life of the shell is prolonged. And thus, the possibility that the sensor shell cracks due to residual stress is reduced.

Description

Technical Field

[0001] This invention relates to the field of sensor assembly welding technology, and more specifically, to an automated assembly and welding apparatus for sensor assemblies. Background Technology

[0002] A sensor typically consists of three parts: a sensing element, a conversion element, and a signal conditioning and conversion circuit. Sometimes, an external auxiliary power supply is required to provide the conversion energy. The sensing element is the part of the sensor that directly senses or responds to the measured quantity. The conversion element is the part of the sensor that converts the measured quantity sensed or responded to by the sensing element into an electrical signal suitable for transmission or measurement. Since the sensor output signal is generally very weak, the sensor output signal usually needs to undergo signal conditioning and conversion, amplification, calculation, and modulation before it can be displayed and used for control. These circuit components need to be protected by a housing.

[0003] Sensor component welding is a crucial step in ensuring sensor performance and reliability, involving multiple technologies, each with its unique advantages and applicable scenarios. Among them, laser welding utilizes a high-energy-density laser beam as a heat source. The high temperature generated by the focused laser spot rapidly melts the workpiece surface and forms a weld. The laser beam can be focused into a very small spot, achieving high-precision welding positioning. Due to the extremely fast heating and cooling rate of laser welding and the small heat-affected zone, welding deformation and damage to internal components are reduced. At the same time, laser welding can weld a variety of metal materials, including stainless steel and titanium alloys, and the welding quality is high, making it suitable for welding sensor housings. In the prior art, during the welding process of the sensor housing, local high-temperature heating and rapid cooling can cause uneven shrinkage and expansion inside the material, resulting in residual stress. If these residual stresses are not reduced in time, they will be gradually released during subsequent use, causing deformation of the sensor housing. At the same time, residual stress is an important driving force for crack initiation and propagation. After cracks are generated, the fatigue resistance of the housing will decrease. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide an automated assembly and welding device for sensor components.

[0005] To address the aforementioned problems, the present invention employs the following technical solution, which enables the sensor housing to promote airflow and accelerate heat dissipation during the welding process by utilizing reinforcing ribs with a honeycomb structure, thereby reducing the impact of thermal stress on the housing structure and ultimately lowering the possibility of cracks appearing in the sensor housing due to residual stress.

[0006] An automated assembly and welding device for sensor components includes a body and welding parts disposed on the upper side of the body. A drive box is slidably connected to the left side of the interior of the body, and a support component is provided on the right side of the drive box. The supporting component includes a fixed base fixedly connected to the output end of the drive box. Electric push rods are fixedly connected to both the front and rear sides inside the fixed base. A movable plate is fixedly connected to the telescopic end of the electric push rod. A fixed rod is fixedly connected to one side of the opposite face of the movable plate on both the front and rear sides. A pressing plate is slidably sleeved on the outer side of the fixed rod. A first pressure spring is fixedly connected in a circular array between the adjacent movable plates and the pressing plate. A reinforcing rib is fixedly connected to the outer side of the fixed rod. The outer diameter of the reinforcing rib is tightly fitted with the inner diameter of the sensor housing.

[0007] Furthermore, an extrusion column is fixedly connected to the right side of the machine body, and the moving plates on the front and rear sides respectively make extrusion contact with the front and rear sides of the fixed seat before moving, and the fixed rod is located at the center of the extrusion plate.

[0008] Furthermore, the reinforcing ribs are honeycomb-shaped, the fixing rod is located at the center of the reinforcing ribs, the diameter of the reinforcing ribs is smaller than the diameter of the extrusion disc, and the reinforcing ribs on the front and rear sides are located between the front and rear extrusion discs.

[0009] Furthermore, a striking component is provided on the right side of the drive box, the striking component including a fixed frame fixedly connected to the front end of the fixed rod on the back side.

[0010] Furthermore, an electromagnet is fixedly connected to the inner left side of the fixed frame, an impact frame is slidably connected to the inner right side of the fixed frame, a second pressure spring is fixedly connected between the inner left side of the fixed frame and the left side of the impact frame, and a magnetic block is fixedly connected to the right side of the impact frame.

[0011] Furthermore, the impact frame is made of hard alloy, and the shape of the impact frame is adapted to the shape of the inner cavity of the fixed frame. The electromagnet and the magnetic block are magnetically attracted to each other. Slide grooves are provided on both the front and rear sides of the fixed frame, and sliders are fixedly connected to both the front and rear sides of the impact frame. The sliders are slidably connected inside the slide grooves.

[0012] Furthermore, a positioning component is provided on the right side of the drive box, the positioning component including a fixing bracket fixedly connected to the lower right side of the drive box.

[0013] Furthermore, the fixing frame is L-shaped, and a groove is provided through the right side of the vertical part of the fixing frame. The groove is frustum-shaped and its shape is adapted to the shape of the extrusion column. After the fixing frame moves, it is fitted onto the outside of the extrusion column through the groove. A support ring is fixedly connected to the left side of the vertical part of the fixing frame. The support ring is arc-shaped.

[0014] Furthermore, the outer side of the fixing frame is provided with a pressing component, which includes columns fixedly connected to the front and rear sides of the upper end of the horizontal part of the fixing frame.

[0015] Furthermore, the inclined surface at the top of the column is connected with rolling balls, and after the columns on the front and rear sides move, they are located on the front and rear sides of the extrusion column. The support ring is located between the front and rear columns, and the axial position of the reinforcing rib corresponds to the position of the external rolling balls.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention promotes air circulation and accelerates heat dissipation during the welding process of the sensor housing by setting the reinforcing ribs, thereby reducing the impact of thermal stress on the housing structure. During the welding process, the drive box drives the sensor housing to rotate at high speed. The honeycomb grid structure acts as the centrifugal fan blade during the rotation, forcibly stirring the air inside the housing to form turbulence. This causes the housing material to undergo rapid heating and cooling, which leads to uneven thermal expansion of the metal material and accumulation of thermal stress. This reduces the impact of thermal stress on the housing structure and reduces the possibility of cracks in the sensor housing due to residual stress.

[0017] (2) The present invention uses an impact frame to repeatedly impact the heat-affected zone inside the sensor housing after welding. Since the heat-affected zone of the sensor housing can be repeatedly impacted by the impact frame made of hard alloy after welding, the surface metal can undergo plastic deformation and form a compressive stress layer. The compressive stress layer will refine the grains and increase the hardness of the material surface, while inhibiting the initiation of microcracks, thereby reducing material spalling during the wear process, so that the quality of the sensor housing after welding is guaranteed.

[0018] (3) The present invention provides double support for the welding end by setting a support ring and extrusion column to ensure the tightness between the sensor housing and the welding end. Since the welding end of the sensor housing can be guaranteed to be tightly attached to the welding end by the double support of the extrusion column and support ring, the tight attachment can ensure that the energy of the welding heat source is concentrated on the joint area, reduce heat loss, make the temperature distribution of the molten pool more uniform, and further ensure the welding quality of the sensor housing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the drive box of the present invention; Figure 3 This is a cross-sectional view of the fixing frame of the present invention; Figure 4 This is a schematic diagram of the reinforcing rib structure of the present invention; Figure 5 This is a schematic diagram of the structure of the fixing base of the present invention; Figure 6 This is a schematic diagram of the extrusion disc of the present invention; Figure 7 This is a schematic diagram of the structure of the fixing frame of the present invention; Figure 8 This is a cross-sectional view of the fixing frame of the present invention.

[0020] Explanation of the labels in the diagram: 1. Machine body; 11. Welded parts; 12. Drive box; 13. Extrusion column; 2. Supporting components; 21. Fixed base; 22. Electric push rod; 23. Moving plate; 24. Fixed rod; 25. Extrusion disc; 26. First pressure spring; 27. Reinforcing rib; 28. Impact assembly; 281. Fixed frame; 282. Electromagnet; 283. Second pressure spring; 284. Impact frame; 285. Magnetic block; 286. Slide groove; 287. Slider; 29. ​​Positioning assembly; 291. Fixed frame; 292. Groove; 293. Support ring; 3. Extrusion components; 31. Column; 32. Ball bearing. Detailed Implementation

[0021] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 8 An automated assembly and welding device for sensor components includes a body 1 and a welding component 11 disposed on the upper side of the body 1. A drive box 12 is slidably connected to the left side of the interior of the body 1, and a support component 2 is provided on the right side of the drive box 12. The support component 2 includes a fixed base 21 fixedly connected to the output end of the drive box 12. Electric push rods 22 are fixedly connected to both the front and rear sides inside the fixed base 21. A movable plate 23 is fixedly connected to the telescopic end of the electric push rod 22. A fixed rod 24 is fixedly connected to one side of the opposite face of the movable plates 23 on both the front and rear sides. A pressing plate 25 is slidably sleeved on the outside of the fixed rod 24. A first pressure spring 26 is fixedly connected between the adjacent movable plates 23 and the pressing plate 25 in a circular array. A reinforcing rib 27 is fixedly connected to the outside of the fixed rod 24. The outer diameter of the reinforcing rib 27 is tightly fitted with the inner diameter of the sensor housing.

[0023] An extrusion column 13 is fixedly connected to the right side of the machine body 1. Before the front and rear moving plates 23 move, they respectively make extrusion contact with the front and rear sides of the fixed seat 21. The fixed rod 24 is located at the center of the extrusion plate 25.

[0024] The reinforcing rib 27 is honeycomb shaped, the fixing rod 24 is located at the center of the reinforcing rib 27, the diameter of the reinforcing rib 27 is smaller than the diameter of the extrusion plate 25, and the reinforcing ribs 27 on the front and rear sides are located between the front and rear extrusion plates 25.

[0025] By adopting the above technical solution, when welding of the sensor housing is required, one end of the sensor housing can be fitted onto the outside of one of the reinforcing ribs 27. Then, the two electric push rods 22 inside the fixed base 21 of the machine body 1 pull the moving plate 23. After the moving plate 23 moves, it will drive the reinforcing rib 27 to move through the fixed rod 24. When both reinforcing ribs 27 are inside the sensor housing, the extrusion plate 25 fitted onto the outside of the fixed rod 24 will extrude pressure on both ends of the sensor housing. As the electric push rod 22 continues to pull the moving plate 23, the moving plate 23 will extrude pressure on the extrusion plate 25 through the first pressure spring 26, so that the extrusion plate 25 is always in contact with the end of the sensor housing. The elasticity of the first pressure spring 26 can be adapted to sensor housings of different lengths. When the sensor housing is locked... Afterwards, the machine body 1 controls the drive box 12 to move to the right. When the welded part on the outside of the sensor housing contacts the extrusion column 13, the sensor housing and its welded part will be locked. At this time, it can be welded by the welding part 11. The drive box 12 can drive the sensor housing to rotate during the welding process. During the welding process, the drive box 12 drives the sensor housing to rotate at high speed. The honeycomb grid structure acts as the blade of a centrifugal fan during the rotation, forcibly stirring the air inside the housing to form turbulence. This causes the housing material to undergo rapid heating and cooling, which will lead to uneven thermal expansion of the metal material and accumulation of thermal stress. The honeycomb-like reinforcing ribs 27 can promote air circulation, accelerate heat dissipation, reduce the impact of thermal stress on the housing structure, and thus reduce the possibility of cracks in the sensor housing due to residual stress.

[0026] like Figures 1 to 5 and Figure 7 and Figure 8 As shown, a striking component 28 is provided on the right side of the drive box 12. The striking component 28 includes a fixed frame 281 fixedly connected to the front end of the fixed rod 24 on the back side.

[0027] An electromagnet 282 is fixedly connected to the left side of the inside of the fixed frame 281, and an impact frame 284 is slidably connected to the right side of the inside of the fixed frame 281. A second pressure spring 283 is fixedly connected between the left side of the inside of the fixed frame 281 and the left side of the impact frame 284, and a magnet 285 is fixedly connected to the right side of the impact frame 284.

[0028] The impact frame 284 is made of hard alloy. The shape of the impact frame 284 is adapted to the shape of the inner cavity of the fixed frame 281. The electromagnet 282 and the magnetic block 285 are magnetically attracted to each other. Slide grooves 286 are provided on both the front and rear sides of the fixed frame 281. Slide blocks 287 are fixedly connected to both the front and rear sides of the impact frame 284. The slide blocks 287 are slidably connected inside the slide grooves 286.

[0029] By adopting the above technical solution, after the sensor housing is welded, the welded part 11 stops working. At this time, the machine body 1 will control the electromagnet 282 inside the fixed frame 281. Because the electromagnet 282 is magnetically attracted to the magnetic block 285 on the right side of the impact frame 284 after it runs, the impact frame 284 is quickly pulled into the interior of the fixed frame 281. At this time, the impact frame 284 squeezes the second pressure spring 283 and completes the energy storage with the help of the elastic force of the second pressure spring 283. When the electromagnet 282 stops working, the second pressure spring 283 will quickly push the impact frame 284 with its own elastic force, so that the impact frame 284 impacts the interior of the welded position of the sensor housing. Every time the electromagnet 282 runs once, the impact frame 284 will also impact the interior of the sensor housing once. It should be noted that the impact force of the impact frame 284 can be precisely controlled by the current of the electromagnet 282, and the impact frame 284 is above the yield strength critical point of the metal material, which can refine the grains without damaging the overall shape of the shell. After welding is completed and while the rolling process is in progress, the electromagnet is activated to relieve stress.

[0030] After the sensor housing is welded, the heat-affected zone of the sensor housing can be repeatedly impacted by the impact frame 284 made of hard alloy, which can cause plastic deformation of the surface metal and form a compressive stress layer. The compressive stress layer will refine the grains and increase the hardness of the material surface, while inhibiting the initiation of microcracks, thereby reducing material spalling during the wear process, so as to ensure the quality of the sensor housing after welding.

[0031] like Figures 1 to 3 As shown, a positioning component 29 is provided on the right side of the drive box 12. The positioning component 29 includes a fixing bracket 291 fixedly connected to the lower right side of the drive box 12.

[0032] The fixing frame 291 is L-shaped. A groove 292 is provided through the right side of the vertical part of the fixing frame 291. The groove 292 is frustum-shaped and its shape matches the shape of the extrusion column 13. After the fixing frame 291 moves, it is fitted onto the outside of the extrusion column 13 through the groove 292. A support ring 293 is fixedly connected to the left side of the vertical part of the fixing frame 291. The support ring 293 is arc-shaped.

[0033] By adopting the above technical solution, when the machine body 1 controls the drive box 12 to move, it will drive the fixed frame 291 to move together. When the vertical part of the fixed frame 291 moves to the outside of the extrusion column 13, the vertical part of the fixed frame 291 will be fitted onto the outside of the extrusion column 13 through the groove 292. The extrusion column 13 will still extrude the welding end of the sensor housing. At the same time, the support ring 293 on the left side of the vertical part of the fixed frame 291 will also support the welding end of the sensor housing, so that the welding end of the sensor housing will always rotate inside the support ring 293 during the welding process. Since the welding end of the sensor housing can be guaranteed to be tightly attached to the sensor housing and the welding end by the double support of the extrusion column 13 and the support ring 293, the tight attachment can ensure that the energy of the welding heat source is concentrated on the joint area, reduce heat loss, make the temperature distribution of the molten pool more uniform, and further ensure the welding quality of the sensor housing.

[0034] like Figure 2 and Figure 3 As shown, the outer side of the fixing frame 291 is provided with a pressing component 3, which includes columns 31 fixedly connected to the front and rear sides of the upper end of the horizontal part of the fixing frame 291.

[0035] The inclined surface at the top of the column 31 is connected to the ball bearing 32. After the front and rear columns 31 are moved, they are located on the front and rear sides of the extrusion column 13. The support ring 293 is located between the front and rear columns 31. The position of the reinforcing rib 27 in the axial direction corresponds to the position of the external ball bearing 32.

[0036] By adopting the above technical solution, the drive box 12 will drive the sensor housing to rotate continuously during welding. After welding, the sensor housing will form a weld. As the weld passes the ball 32 on the upper side of the column 31, the two ball 32 will continuously squeeze the weld. After the ball 32 contacts the weld, it will cause plastic deformation of the metal surface through high pressure, the grains will be elongated and refined, forming a continuous fiber structure and producing a work hardening effect. It should be noted that when the ball bearing 32 applies pressure to the weld for rolling and shaping, the internal reinforcing rib 27 provides radial counter-support force, forming a clamping structure of 'ball bearing-shell-reinforcing rib', which prevents the thin-walled shell from undergoing elliptical deformation or collapse during the rolling process. The plastic deformation generated by the rolling of the ball bearing 32 introduces residual compressive stress on the surface, which can offset the residual tensile stress of the weld, reduce the risk of crack initiation and propagation. The extrusion of the ball bearing 32 can repair the micro-geometry of the weld surface, fill pits, eliminate burrs, and form a mirror-level surface, further ensuring the welding quality of the sensor shell.

[0037] Working principle: When welding is required on the sensor housing, the sensor housing is fitted onto the outside of the fixed frame 281, while the two reinforcing ribs 27 are located on the left and right sides of the fixed frame 281. Subsequently, the machine body 1 activates the two electric push rods 22 inside the fixed base 21 to pull the moving plate 23, causing the fixed rod 24 to move the reinforcing ribs 27. The extrusion plate 25, fitted onto the outside of the fixed rod 24, extrudes the front and rear ends of the sensor housing through the first pressure spring 26. When the sensor housing is locked and its outer welding point contacts the extrusion column 13, it can be welded by the welding part 11. After the sensor housing is welded, the welding part 11 stops working. At this time, the electromagnet 282 inside the fixed frame 281 can be controlled, so that the impact frame 284 is quickly drawn into the interior of the fixed frame 281 to complete the energy storage. When the electromagnet 282... After 82 stops working, the second pressure spring 283 will quickly push the impact frame 284 with its own elastic force, so that the impact frame 284 impacts the inside of the welding position of the sensor housing. Every time the electromagnet 282 runs once, the impact frame 284 will also impact the inside of the sensor housing once. After the machine body 1 controls the drive box 12 to move, it will drive the fixed frame 291 to move together, so that it is fitted on the outside of the extrusion column 13 through the groove 292. At the same time, the support ring 293 on the left side of the vertical part of the fixed frame 291 will also support the welding end of the sensor housing, so that the welding end of the sensor housing will always rotate inside the support ring 293 during the welding process. Because the drive box 12 will drive the sensor housing to rotate continuously during welding, as the weld passes the ball 32 on the upper side of the column 31, the two ball 32 will continuously extrude pressure on the weld.

[0038] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. An automated assembly and welding device for sensor components, comprising a body (1) and a welding component (11) disposed on the upper side of the body (1), wherein a drive box (12) is slidably connected to the left side inside the body (1), characterized in that: The drive box (12) is provided with a support component (2) on the right side; The support component (2) includes a fixed base (21) fixedly connected to the output end of the drive box (12). Electric push rods (22) are fixedly connected to both the front and rear sides inside the fixed base (21). A moving plate (23) is fixedly connected to the telescopic end of the electric push rod (22). A fixed rod (24) is fixedly connected to one side of the opposite face of the moving plate (23) on both the front and rear sides. A pressing plate (25) is slidably sleeved on the outside of the fixed rod (24). A first pressure spring (26) is fixedly connected between the adjacent moving plates (23) and the pressing plate (25) in a ring array. A reinforcing rib (27) is fixedly connected to the outside of the fixed rod (24). The outer diameter of the reinforcing rib (27) is tightly fitted with the inner diameter of the sensor housing.

2. The automated assembly and welding device for sensor components according to claim 1, characterized in that: The extrusion column (13) is fixedly connected to the right side of the body (1). Before the moving plates (23) on the front and rear sides move, they respectively press against the front and rear sides of the fixed seat (21). The fixed rod (24) is located at the center of the extrusion plate (25).

3. The automated assembly and welding device for sensor components according to claim 1, characterized in that: The reinforcing rib (27) is honeycomb shaped, the fixing rod (24) is located at the center of the reinforcing rib (27), the diameter of the reinforcing rib (27) is smaller than the diameter of the extrusion plate (25), and the reinforcing rib (27) on the front and rear sides is located between the extrusion plates (25) on the front and rear sides.

4. The automated assembly and welding device for sensor components according to claim 1, characterized in that: The right side of the drive box (12) is provided with a striking component (28), which includes a fixed frame (281) fixedly connected to the front end of the back fixing rod (24).

5. The automated assembly and welding device for sensor components according to claim 4, characterized in that: An electromagnet (282) is fixedly connected to the left side of the inside of the fixed frame (281), and an impact frame (284) is slidably connected to the right side of the inside of the fixed frame (281). A second pressure spring (283) is fixedly connected between the left side of the inside of the fixed frame (281) and the left side of the impact frame (284). A magnet (285) is fixedly connected to the right side of the impact frame (284).

6. The automated assembly and welding device for sensor components according to claim 5, characterized in that: The impact frame (284) is made of hard alloy. The shape of the impact frame (284) is adapted to the shape of the inner cavity of the fixed frame (281). The electromagnet (282) and the magnetic block (285) are magnetically attracted to each other. The front and rear sides of the fixed frame (281) are provided with sliding grooves (286). The front and rear sides of the impact frame (284) are fixedly connected with sliders (287). The sliders (287) are slidably connected inside the sliding grooves (286).

7. The automated assembly and welding device for sensor components according to claim 1, characterized in that: The right side of the drive box (12) is provided with a positioning component (29), which includes a fixing bracket (291) fixedly connected to the lower right side of the drive box (12).

8. The automated assembly and welding device for sensor components according to claim 7, characterized in that: The fixing frame (291) is L-shaped. A groove (292) is provided through the right side of the vertical part of the fixing frame (291). The groove (292) is frustum-shaped. The shape of the groove (292) is adapted to the shape of the extrusion column (13). After the fixing frame (291) moves, it is fitted onto the outside of the extrusion column (13) through the groove (292). A support ring (293) is fixedly connected to the left side of the vertical part of the fixing frame (291). The support ring (293) is arc-shaped.

9. The automated assembly and welding device for sensor components according to claim 8, characterized in that: The outer side of the fixing frame (291) is provided with a pressing component (3), which includes a column (31) fixedly connected to the front and rear sides of the upper end of the horizontal part of the fixing frame (291).

10. The automated assembly and welding device for sensor components according to claim 9, characterized in that: The inclined surface at the top of the column (31) is connected to a ball bearing (32). After the columns (31) on the front and rear sides are moved, they are located on the front and rear sides of the extrusion column (13). The support ring (293) is located between the columns (31) on the front and rear sides. The position of the reinforcing rib (27) in the axial direction corresponds to the position of the external ball bearing (32).

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