Turnover positioning tool for automatic welding of automobile seat slide rail

Abstract

The utility model discloses a turnover positioning tool of automobile seat slide rail automatic welding relates to automobile parts welding tool technical field, including frame seat, one end of frame seat is equipped with control system, the upper end of frame seat is provided with turnover mechanism, the upper end of turnover mechanism is provided with positioning mechanism. The utility model discloses, adopt servo variable speed motor cooperation gear transmission pair to realize turnover drive, transmission ratio precision and deceleration increase the torsional effect is remarkable, and the closed -loop control of absolute value angle sensor is combined, has improved the precision of turnover angle, has effectively ensured the accuracy of welding position, secondly, realizes the continuous adjustable of positioning width, adapts the positioning demand of different models, different width's automobile seat slide rail, positioning wheel adopts polyurethane material and slide rail flexible adhesion, and the buffer protection of cooperation backing plate can ensure positioning accuracy, can avoid slide rail surface damage, improves product pass rate.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts welding tooling technology, and in particular to a flipping and positioning tooling for automatic welding of automotive seat slide rails. Background Technology

[0002] As a core component of the seat adjustment system, the welding quality of automotive seat slide rails directly determines the smoothness and stability of seat adjustments, as well as safety during driving. Therefore, the automatic welding process in slide rail production has extremely stringent requirements for positioning accuracy and tilting stability. With the diversification of automobile models, the models and sizes of seat slide rails used in different models vary significantly, placing higher demands on the compatibility and adaptability of welding tooling.

[0003] However, in the existing technology, the flip positioning fixture for welding automotive seat slide rails has exposed many technical defects in practical applications. The positioning compatibility is poor. Traditional fixtures are mostly fixed positioning structures, and the positioning width corresponds one-to-one with the slide rail model. When switching to different models of slide rails, it is necessary to disassemble and replace positioning blocks, adjustment brackets and other components. The replacement process is time-consuming and seriously affects production efficiency. Therefore, a flip positioning fixture for automatic welding of automotive seat slide rails has been proposed. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a flip-and-position tooling for automatic welding of automotive seat slide rails.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flipping and positioning fixture for automatic welding of automotive seat slide rails, comprising a frame base, a control system installed at one end of the frame base, a flipping mechanism provided at the upper end of the frame base, and a positioning mechanism provided at the upper end of the flipping mechanism. The flipping mechanism includes a fixed base, a variable speed motor is installed on the inner wall of the groove of the frame base, a transmission rod is fixedly installed on the output end of the variable speed motor, a rotating shaft is rotatably installed through one end of the fixed base, a large gear is installed on the outer wall of the rotating shaft, a small gear is installed on the outer wall of the transmission rod, and a long rod is installed on one end of the rotating shaft. The positioning mechanism includes a mounting frame, on the upper end of which are two sets of telescopic cylinders arranged symmetrically. Each set of telescopic cylinders has a guide seat at its upper end, and each set of guide seats has a positioning plate at its upper end. Each set of positioning plates has a slide at its lower end, and each set of positioning plates has a pad at one bottom. Each set of positioning plates has two sets of positioning wheels fixedly mounted at its upper end, and each set of guide seats has a connecting push plate at one end.

[0006] Preferably, an angle sensor is installed on the outer wall of the long rod, and the lower end of the fixing seat is fixed to the upper end of the frame seat.

[0007] Preferably, the large gear is located inside the fixed base, and the upper teeth of the small gear pass through the lower opening of the fixed base and mesh with the outer teeth of the large gear.

[0008] Preferably, the variable speed motor is connected to the control system signal, and the angle sensor is connected to the control system signal.

[0009] Preferably, the inner wall of the mounting bracket is fixed to the outer wall of the long rod, and the two sets of slide blocks are slidably installed inside the two sets of guide seats respectively.

[0010] Preferably, the extended ends of the two sets of telescopic cylinders are respectively fixed to one end of the two sets of connecting push plates, and the protruding parts of one end of the two sets of connecting push plates are respectively fixed to one end of the two sets of slides.

[0011] Preferably, one end of each of the two sets of connecting push plates is fixed to one end of each of the two sets of positioning plates, and both sets of telescopic cylinders are connected to the control system signal.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the flipping accuracy is high and the stability is strong: the flipping drive is achieved by using a servo speed change motor in combination with a gear transmission pair. The transmission ratio is accurate and the speed reduction and torque increase effect is significant. Combined with the closed-loop control of the absolute angle sensor, the accuracy of the flipping angle is improved, effectively ensuring the accuracy of the welding position.

[0013] 2. This utility model has excellent positioning compatibility and adaptability: It adopts a symmetrical adjustable positioning structure, and the positioning plate is driven to slide synchronously by two sets of telescopic cylinders to realize continuous adjustment of the positioning width, which can adapt to the positioning needs of different models and widths of car seat slide rails; the positioning wheel is made of polyurethane material and flexibly bonded to the slide rail, and with the cushioning protection of the pad, it can not only ensure positioning accuracy, but also avoid damage to the slide rail surface and improve the product qualification rate.

[0014] 3. This utility model features a high degree of automation and convenient operation: It uses a PLC control system as its core, integrating motor drive, sensor acquisition, and cylinder control functions. Parameter setting and automatic operation can be completed through the touch screen, eliminating the need for manual adjustment of positioning width and flipping angle, thus significantly reducing the labor intensity of operators. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the flipping and positioning fixture for automatic welding of automotive seat slide rails proposed in this utility model. Figure 2 This is a front structural diagram of the flipping and positioning fixture for automatic welding of automotive seat slide rails proposed in this utility model. Figure 3 A bottom view of a portion of the flipping mechanism of the flipping and positioning fixture for automatic welding of car seat slide rails proposed in this utility model. Figure 4 This is an exploded view of the positioning mechanism of the flipping and positioning fixture for automatic welding of automotive seat slide rails proposed in this utility model.

[0016] Legend: 1. Frame base; 11. Control system; 2. Tilting mechanism; 21. Fixed base; 22. Variable speed motor; 23. Transmission rod; 24. Rotating shaft; 25. Large gear; 26. Small gear; 27. Long rod; 28. Angle sensor; 3. Positioning mechanism; 31. Mounting bracket; 32. Guide seat; 33. Positioning plate; 34. Slide; 35. Pad; 36. Positioning wheel; 37. Telescopic cylinder; 38. Connecting push plate. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a flipping and positioning fixture for automatic welding of automotive seat slide rails, including a frame base 1, a control system 11 installed at one end of the frame base 1, a flipping mechanism 2 provided at the upper end of the frame base 1, and a positioning mechanism 3 provided at the upper end of the flipping mechanism 2. The flipping mechanism 2 includes a fixed base 21. A variable speed motor 22 is installed on the inner wall of the groove of the frame base 1. A transmission rod 23 is fixedly installed on the output end of the variable speed motor 22. A rotating shaft 24 is rotatably installed through one end of the fixed base 21. A large gear 25 is installed on the outer wall of the rotating shaft 24. A small gear 26 is installed on the outer wall of the transmission rod 23. A long rod 27 is installed on one end of the rotating shaft 24. An angle sensor 28 is installed on the outer wall of the long rod 27. The lower end of the fixed base 21 is fixed to the upper end of the frame base 1. The large gear 25 is located inside the fixed base 21. The upper teeth of the small gear 26 pass through the lower opening of the fixed base 21 and mesh with the teeth on the outer wall of the large gear 25. The variable speed motor 22 is connected to the control system 11. The angle sensor 28 is also connected to the control system 11. The positioning mechanism 3 includes a mounting frame 31. Two sets of telescopic cylinders 37 are symmetrically arranged on the upper end of the mounting frame 31. Guide seats 32 are mounted on the upper end of each set of telescopic cylinders 37. Positioning plates 33 are mounted on the upper end of each set of guide seats 32. Slides 34 are mounted on the lower end of each set of positioning plates 33. A pad 35 is mounted on the bottom of one end of each set of positioning plates 33. Two sets of positioning wheels 36 are fixedly mounted on the upper end of each set of positioning plates 33. A connecting rod is provided at one end of each set of guide seats 32. The inner wall of the connecting push plate 38 and the mounting bracket 31 is fixed to the outer wall of the long rod 27. The two sets of sliding blocks 34 are slidably installed inside the two sets of guide seats 32. The protruding ends of the two sets of telescopic cylinders 37 are fixed to one end of the two sets of connecting push plates 38. The protruding parts of one end of the two sets of connecting push plates 38 are fixed to one end of the two sets of sliding blocks 34. One end of the two sets of connecting push plates 38 is fixed to one end of the two sets of positioning plates 33. Both sets of telescopic cylinders 37 are connected to the control system 11 via signals.

[0020] The specific settings and functions of this embodiment are described in detail below. The frame base 1 is an integrated casting structure, forged from high-strength aluminum alloy, which combines lightweight and high rigidity. It can effectively bear the weight of the flipping mechanism 2 and the positioning mechanism 3, as well as the vibration load during the welding process. One end of the frame base 1 is fixedly installed with a control system 11 by bolts. The control system 11 adopts a PLC programmable logic controller, equipped with a 7-inch touch screen, and supports functions such as manual parameter setting, automatic operation and fault alarm. It integrates a motor drive module, a sensor signal acquisition module and a cylinder control module, providing core control support for the automated operation of the entire tooling. The upper end face of the frame base 1 is provided with an installation groove that matches the flipping mechanism 2. The inner wall of the groove is provided with positioning pin holes and threaded holes to ensure the accuracy of the installation and positioning of the flipping mechanism 2.

[0021] The flipping mechanism 2 is a gear-driven flipping structure; the fixed base 21 is a hollow rectangular shell structure, made of gray cast iron, with a gear mounting cavity and bearing mounting holes inside. The lower end is connected to the upper end face of the frame base 1 by a double fixing method of positioning pin and bolt. Shock-absorbing pads are set between the connecting surfaces to reduce the impact of welding vibration on the gear transmission accuracy. Drive components: A variable speed motor 22 is fixedly mounted on the inner wall of the groove of the frame seat 1 via a motor mounting base, supporting stepless speed regulation; a transmission rod 23 is fixedly mounted on the output end of the variable speed motor 22 via a key connection, and the other end of the transmission rod 23 is rotatably connected to the inner wall of the frame seat 1 via a deep groove ball bearing to ensure transmission stability; a pinion 26 is fixedly mounted on the outer wall of the transmission rod 23 via a flat key. The tilting transmission assembly: A rotating shaft 24 is rotatably mounted on one end of the fixed base 21 through a tapered roller bearing. A skeleton oil seal is provided at the mating point between the rotating shaft 24 and the fixed base 21 to prevent welding fumes from entering the bearing and affecting its service life. A large gear 25 is installed on the outer wall of the rotating shaft 24 inside the fixed base 21 through an interference fit. The large gear 25 and the small gear 26 are a meshing transmission pair, which can achieve a speed reduction and torque increase effect, ensuring a smooth and powerful tilting process. Connection and detection components: One end of the rotating shaft 24 is fixedly mounted with a long rod 27 via a flange. The long rod 27 is a hollow stainless steel tube structure, and an angle sensor 28 is fixedly mounted on its outer wall via a bracket. The angle sensor 28 is an absolute encoder that can collect the flip angle signal in real time. The variable speed motor 22 is connected to the motor drive module of the control system 11 via a power cable, and the angle sensor 28 is connected to the signal acquisition module of the control system 11 via a signal line, forming a closed-loop control of the flip angle.

[0022] Positioning mechanism 3 is a symmetrical adjustable positioning structure, which can adapt to the positioning requirements of different types of slide rails; Installation foundation: The mounting frame 31 is a rectangular frame structure, which is welded from steel plates. After welding, it is subjected to aging treatment to eliminate internal stress. The inner wall of the mounting frame 31 is fixed to the outer wall of the long rod 27 by welding. A reinforcing rib is set between the two to improve the connection rigidity and ensure the synchronous movement of the positioning mechanism 3 and the flipping mechanism 2 during the flipping process. Drive and guide components: Two sets of telescopic cylinders 37 are symmetrically fixedly mounted on the upper end of the mounting bracket 31 via cylinder mounting seats, and equipped with pressure regulating valves to precisely control the telescopic force; guide seats 32 are fixedly mounted on the upper end of both sets of telescopic cylinders 37 via bolts, and T-shaped sliding grooves are opened inside the guide seats 32 to reduce sliding friction resistance. Positioning execution components: Positioning plates 33 are provided at the upper ends of both sets of guide seats 32. The positioning plates 33 are made of wear-resistant steel plate with a hardened surface. Slide seats 34 are bolted to the lower ends of both sets of positioning plates 33. The slide seats 34 have a T-shaped structure and slide smoothly into the T-shaped grooves of the guide seats 32, ensuring smooth sliding without any movement. A pad 35, made of rubber, is fixed to the bottom of one end of each set of positioning plates 33, providing cushioning and protection for the bottom of the slide rail. Two sets of positioning wheels 36 are fixed to the upper ends of both sets of positioning plates 33 via bearing seats. The positioning wheels 36 are made of polyurethane, and the spacing between the positioning wheels 36 can be finely adjusted by adjusting the position of the bearing seats. Connecting transmission components: Each of the two sets of guide seats 32 is provided with a connecting push plate 38 at one end, and the connecting push plate 38 is an L-shaped steel plate structure; the extended ends of the two sets of telescopic cylinders 37 are fixed to one end of the two sets of connecting push plates 38 respectively through floating joints; the protruding parts of one end of the two sets of connecting push plates 38 are fixed to one end of the two sets of slide seats 34 respectively through bolts, and at the same time, one end of the two sets of connecting push plates 38 is fixed to one end of the two sets of positioning plates 33 respectively by welding, so as to effectively transmit the driving force of the telescopic cylinders 37 to the positioning plates 33; both sets of telescopic cylinders 37 are connected to the cylinder control module of the control system 11 through air pipes to realize synchronous telescopic control.

[0023] The usage method and working principle of this device: Parameter setting: According to the model of the car seat slide rail to be welded, the positioning width parameter and the flip angle parameter are set through the touch screen of the control system 11. The control system 11 automatically calculates the extension stroke of the telescopic cylinder 37 and the rotation angle of the variable speed motor 22. Positioning adjustment: The control system 11 controls the two sets of telescopic cylinders 37 to extend or retract synchronously. Through the connecting push plate 38, the slide block 34 is driven to slide along the T-shaped slide groove of the guide seat 32, thereby driving the two sets of positioning plates 33 to move closer or further away synchronously until the spacing of the positioning wheels 36 matches the width of the slide rail. After the adjustment is completed, the telescopic cylinders 37 maintain a pressure state to lock the positioning width.

[0024] Slide rail placement: Place the car seat slide rail to be welded on the pad 35 of the two sets of positioning plates 33. The two sides of the slide rail are in close contact with the positioning wheels 36. The positioning wheels 36 achieve the initial positioning of the slide rail by rolling and contacting. The cushioning effect of the pad 35 avoids damage to the bottom of the slide rail. Flip welding: According to the welding process requirements, the control system 11 starts the variable speed motor 22, which drives the small gear 26 to rotate through the transmission rod 23. The small gear 26 drives the large gear 25 and the rotating shaft 24 to rotate, which in turn drives the positioning mechanism 3 and the slide rail to rotate synchronously through the long rod 27. The angle sensor 28 collects the flip angle signal in real time and feeds it back to the control system 11. When the flip reaches the preset angle, the control system 11 controls the variable speed motor 22 to stop rotating and lock it. The welding robot performs welding operations on the corresponding position of the slide rail. Multi-directional welding: After welding at a single angle is completed, the control system 11 repeats the above flipping process, driving the slide rail to flip to each preset welding angle in sequence until all welding processes are completed; Reset of part: After welding is completed, the control system 11 controls the variable speed motor 22 to drive the positioning mechanism 3 to reset to the initial horizontal position, and then controls the telescopic cylinder 37 to retract, driving the positioning plates 33 to move away from each other, releasing the positioning of the slide rail, and the operator takes out the welded slide rail, and the tooling completes one work cycle.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A flipping and positioning fixture for automatic welding of automotive seat slide rails, comprising a frame base (1), characterized in that: A control system (11) is installed at one end of the frame base (1), a flipping mechanism (2) is provided at the upper end of the frame base (1), and a positioning mechanism (3) is provided at the upper end of the flipping mechanism (2). The flipping mechanism (2) includes a fixed base (21), a variable speed motor (22) is installed on the inner wall of the groove of the frame base (1), a transmission rod (23) is fixedly installed on the output end of the variable speed motor (22), a rotating shaft (24) is rotatably installed through one end of the fixed base (21), a large gear (25) is installed on the outer wall of the rotating shaft (24), a small gear (26) is installed on the outer wall of the transmission rod (23), and a long rod (27) is installed on one end of the rotating shaft (24). The positioning mechanism (3) includes a mounting frame (31). Two sets of telescopic cylinders (37) are symmetrically arranged on the upper end of the mounting frame (31). Guide seats (32) are installed on the upper end of each set of telescopic cylinders (37). Positioning plates (33) are provided on the upper end of each set of guide seats (32). Slide seats (34) are installed on the lower end of each set of positioning plates (33). Pads (35) are installed on the bottom of one end of each set of positioning plates (33). Two sets of positioning wheels (36) are fixedly installed on the upper end of each set of positioning plates (33). Connecting push plates (38) are provided on one end of each set of guide seats (32).

2. The flipping and positioning fixture for automatic welding of automotive seat slide rails according to claim 1, characterized in that: An angle sensor (28) is installed on the outer wall of the long rod (27), and the lower end of the fixed seat (21) is fixed to the upper end of the frame seat (1).

3. The flipping and positioning fixture for automatic welding of automotive seat slide rails according to claim 2, characterized in that: The large gear (25) is located inside the fixed seat (21), and the upper teeth of the small gear (26) pass through the lower opening of the fixed seat (21) and mesh with the outer teeth of the large gear (25).

4. The flipping and positioning fixture for automatic welding of automotive seat slide rails according to claim 3, characterized in that: The variable speed motor (22) is connected to the control system (11) by signal, and the angle sensor (28) is connected to the control system (11) by signal.

5. The flipping and positioning fixture for automatic welding of automotive seat slide rails according to claim 1, characterized in that: The inner wall of the mounting bracket (31) is fixed to the outer wall of the long rod (27), and the two sets of sliding blocks (34) are respectively slidably installed inside the two sets of guide seats (32).

6. The flipping and positioning fixture for automatic welding of automotive seat slide rails according to claim 5, characterized in that: The extended ends of the two sets of telescopic cylinders (37) are respectively fixed to one end of the two sets of connecting push plates (38), and the protruding parts of one end of the two sets of connecting push plates (38) are respectively fixed to one end of the two sets of sliding blocks (34).

7. The flipping and positioning fixture for automatic welding of automotive seat slide rails according to claim 6, characterized in that: One end of each of the two sets of connecting push plates (38) is fixed to one end of each of the two sets of positioning plates (33), and both sets of telescopic cylinders (37) are connected to the control system (11) via signal.

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