Positioning tool for the detection of tubular parts for automotive vehicles

Abstract

The application relates to the technical field of automobile pipe machining, in particular to a positioning tool for detecting automobile tubular parts, which comprises a workbench composed of frame plate one, frame plate two and a plurality of groups of roller shafts. The positioning tool is simple in limiting mode, can effectively reduce the off-track condition during pipe conveying and detection, and improves the detection efficiency; the setting of the abutting plate, the clamping mechanism and the exhaust passage can not only observe whether the pipe surface appears the condition of leaking smoke to judge whether the pipe surface has holes and the like, but also further press and clamp the pipe, so that the compression resistance of the pipe can be detected and judged, and the diversity of pipe detection can be realized; finally, the setting of the rectangular long box, the gear three and the cross-shaped rotating rod structure, which are matched with the clamping mechanism, can facilitate the all-around observation of the outer surface of the pipe, and further improve the pipe detection and observation efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, specifically to a positioning fixture for inspecting tubular automotive parts. Background Technology

[0002] Automotive pipe fittings are mostly rigid pipe fittings, which are usually manufactured by casting. To ensure the quality and performance of the pipes, after the pipes are formed, they usually need to be tested in many ways. In addition to the usual tests on the shape and size of the pipe fittings, the most important tests for the staff are the pipe fittings’ ability to recover from compression and whether there are any holes on the surface, which directly affect the performance of automotive pipe fittings. In the actual testing process, the connection between the workpiece clamping and air circuit of the existing testing equipment and the pipe is relatively cumbersome, which can easily lead to long initial operation time. However, if the workpiece clamping is too simple, the pipe can easily deviate from the testing track during the transport process, resulting in low overall clamping efficiency of the equipment and affecting the efficiency of subsequent testing. In addition, the existing testing equipment can usually only perform one of the above-mentioned specific tests on the pipe, which is a single testing function. Moreover, in order to improve the comprehensiveness of pipe inspection and observation and reduce the occurrence of blind spots, the pipe needs to be rotated repeatedly. A series of operation steps consume a lot of time and manpower, thereby reducing the testing efficiency of the pipe. Summary of the Invention

[0003] The purpose of this invention is to improve testing efficiency by setting up a frame plate 1, a frame plate 2, a clamping plate, and several sets of clamping mechanisms. This limiting method is simple and can effectively reduce the occurrence of pipe fittings derailing during transport and testing. Furthermore, by setting a stop plate on the inner wall of the frame plate 2, which cooperates with the clamping mechanism and the exhaust channel, it can not only observe whether there is leakage of smoke on the surface of the pipe fitting to determine whether there are holes, but also further press and clamp the pipe fitting, which is convenient for testing and judging the compressive strength of the pipe fitting and is conducive to realizing the diversity of pipe fitting testing. Finally, by setting up a rectangular box, a gear 3, and a cross rotating rod structure, which cooperates with the clamping mechanism, it is convenient to observe the outer surface of the pipe fitting from all directions, further improving the efficiency of pipe fitting testing and observation.

[0004] The objective of this invention can be achieved through the following technical solution: A positioning fixture for inspecting tubular automotive parts, comprising a worktable, the worktable being composed of a frame plate one, a frame plate two, and several sets of rollers. The frame plate one is located at the rear end of the frame plate two, and both ends of the frame plate one extend to the sides of the frame plate two. A bracket is fixedly connected to the bottom of both the frame plate one and the frame plate two. A backing plate is fixedly installed on one side of the frame plate two opposite to the frame plate one, near the upper middle end, and both sides of the backing plate are arc-shaped. Several sets of rollers are rotatably connected to the middle section of the front end face of the frame plate one. One end of the roller overlapping the rear end face of the frame plate two is rotatably connected to the frame plate two. An inclined feeding frame is fixedly installed on the rear end face of the frame plate one. A fixed plate is fixedly installed on one side, and a gear is rotatably connected to the center of the front end of the fixed plate. The central bearing of the gear passes through the fixed plate and is fixedly connected to a motor. A clamping plate is slidably connected between frame plate one and frame plate two and located at the upper ends of several sets of rollers. A rack is fixedly installed on the rear end face of the clamping plate. The rear edge of the rack and the front edge of the clamping plate are slidably connected in the transverse grooves opened on the opposite sides of frame plate two and frame plate one, and the rack meshes with gear one. A locking strip is horizontally fixedly installed at the center of the upper end face of the clamping plate, and several sets of U-shaped slots are fixedly installed at equal intervals on the upper end face of the locking strip. Several sets of clamping mechanisms are fixedly installed at equal intervals on the upper end face of the clamping plate, and the clamping mechanisms correspond to the front and rear of the several sets of slots.

[0005] Furthermore, the two clamping mechanisms corresponding to the front and rear are a group, and the two are symmetrical about the card slot. An exhaust channel is provided at the rear clamping mechanism.

[0006] Furthermore, the clamping mechanism includes a limiting frame, which is fixedly installed on the upper surface of the clamping plate. Insert rods are fixedly installed on both sides of the limiting frame opposite to the clamping strip. Insert cylinders are fixedly installed on one side of the clamping strip at corresponding positions to the two sets of insert rods. One end of each insert rod is inserted into the cylinder. A spring-damped shock absorber is fixedly connected between the insert rod and the inner wall of the cylinder. A second gear is rotatably connected inside the limiting frame. The top of the second gear extends to the outside of the limiting frame, and a ventilation pipe is fixedly connected to the center of the second gear.

[0007] Furthermore, the front and rear ends of the ventilation pipe extend to the outside of the limiting frame, and the rear end of the ventilation pipe is fixedly connected to the exhaust channel. A stop cylinder is provided at the center of one side of the limiting frame near the card strip, and the front end of the ventilation pipe extends into the inside of the stop cylinder.

[0008] Furthermore, a retaining seat is fixedly installed at the center of the front and rear inner walls of the retaining cylinder, and a retaining rod is hinged inside the retaining seat. The retaining rod is inclined with one side higher than the other. The two sets of retaining rods are symmetrical about the center of the retaining cylinder. A push rod is hinged to one end of the retaining rod near the opening of the retaining cylinder, and one end of the push rod extends to the outside of the retaining cylinder. The through-hole of the retaining cylinder is larger than the width of the push rod, and an inclined elastic retaining piece is hinged to the inner wall of the through-hole.

[0009] Furthermore, a rectangular box is fixedly installed on the upper surface of the frame plate near the center, and a rotating shaft is rotatably connected to the inside of the rectangular box near both sides. The front and rear ends of the rotating shaft extend to the outside of the rectangular box, and a gear three is fixedly installed at the front end of the rotating shaft. The gear three is adapted to the rack.

[0010] Furthermore, the rear end of the rotating shaft extends to the upper opening of the feeding frame and is fixedly installed with a cross rotating rod, and one end of the cross rotating rod penetrates into the inside of the feeding frame.

[0011] A positioning fixture for inspecting tubular automotive parts, the operation method of which specifically includes the following steps: Step 1: First, several sets of automotive pipe fittings are transported to near the ground through the inclined surface of the feeding frame. Then, the pipe fittings are clamped and placed on the surface of the clamping plate. When clamping the pipe fittings, the middle section of the pipe fitting is engaged in the slot, and the front and rear ends are inserted into the corresponding abutment cylinders. At this time, the front and rear pipe openings of the pipe fittings are respectively connected to the ventilation pipe. The distance between the front and rear abutment cylinders is adjusted and moved according to the length of the pipe fittings. Multiple sets of pipe fittings are used to limit the upper part of the clamping plate in the above manner for subsequent inspection. Step 2: Insert the front and rear ends of the pipe fitting into the support cylinder. The pipe end section of the pipe fitting passes over the two sets of retainers and presses against the adjacent ends of the two sets of support rods. Then, under the hinge action of the support rods and retainers, the two sets of support rods lift up, forcing their other ends to move towards the outer wall of the pipe fitting along with the push rod until one end of the push rod presses against the outer wall of the pipe fitting. During this process, the push rod is inserted into the support cylinder, its position changes, and it presses against the elastic support plate on the through-hole side. The front and rear ends of the pipe fitting are both limited in the same way, which can effectively reduce the situation of the pipe fitting derailing during transport and testing. Step 3: Next, start the motor. Its drive gear one rotates counterclockwise. The rack meshing with gear one moves towards the gap between frame plate one and frame plate two, simultaneously driving the clamping plate and several sets of pipe fittings held on its surface to move. Among them, the pipe fitting closest to the gap between frame plate one and frame plate two, and the clamping mechanism at the front end of the set of pipe fittings, abuts against the curved surface on one side of the abutment plate. The limiting frame at the front end of the set of pipe fittings slides along the curved surface to the front end of the abutment plate. Due to the abutment, the limiting frame is pushed towards the locking strip, and the insertion rod is inserted into the insertion cylinder. The spring damping shock absorber is compressed, thereby realizing the parallel movement of the limiting frame. The movement reduces offset and assists in the later return of the limit frame, forcing the pipe ends to be inserted deeper into the cylinder, so that the ventilation pipes can be inserted into the pipe ends respectively. Then, colored non-toxic smoke is sent in through the exhaust channel to observe whether there is any leakage of smoke on the surface of the pipe and to determine whether there are holes on the surface of the pipe. Pipes with surface leakage of smoke are marked. Furthermore, as the front and rear clamping mechanisms advance, the front and rear ends of the pipe are pressed and clamped, which also facilitates the detection and judgment of the compressive strength of the pipe and helps to realize the diversity of pipe inspection. Step 4: As the clamping plate continues to be pushed in, when the clamping mechanism at the rear end of the pipe moves to gear three along with the clamping plate, gear three moves parallel to gear two and meshes with it, thereby achieving synchronous rotation of gear two and gear three. Gear two drives the cylinder and the pipe to rotate, thus facilitating all-round observation of the outer surface of the pipe and further improving the efficiency of pipe inspection and observation. When gear three drives the rotating shaft and the cross rod to rotate synchronously, the cross rod alternately rotates into the feeding frame, realizing intermittent feeding of the feeding frame and improving feeding efficiency. Step 5: After inspection, the pipe fittings and their associated clamping mechanisms are pushed past frame plate 2 by the clamping plate, and the restrained limit frame loses the pressure of the restraining plate and resets under the rebound force of the spring damping shock absorber, forcing the distance between the front and rear clamping mechanisms to increase, so as to facilitate the removal of all the pipe fittings that are found to be defective and those that are of good quality for classification.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention comprises a frame plate 1, a frame plate 2, a clamping plate, and several sets of clamping mechanisms. Several sets of pipe fittings are constrained on the surface of the clamping plate by the clamping mechanisms. The distance between the front and rear clamping structures is adjusted according to the length of the pipe fittings. The two sets of pipe openings are respectively inserted into the corresponding abutment cylinders. The pipe opening section of the pipe fitting passes over the two sets of clamping seats and presses against the adjacent ends of the two sets of abutment rods. The two sets of abutment rods lift up, forcing their other ends to move together with the push rods towards the outer wall of the pipe fittings until one end of the push rod presses against the outer wall of the pipe fittings. This limiting method is simple and can effectively reduce the occurrence of pipe fittings derailing during transport and testing, thereby improving testing efficiency.

[0013] This invention, by setting a backing plate, which cooperates with a clamping mechanism and an exhaust channel, allows several sets of pipe fittings clamped on the clamping plate and its surface to move. Among them, the pipe fitting closest to the distance between frame plate one and frame plate two, and the clamping mechanism located at the front end of the set of pipe fittings, abut against the curved surface of one side of the backing plate. The limiting frame at the front end of the set of pipe fittings slides along the curved surface to the front end of the backing plate, and the distance between the two sets of backing cylinders becomes closer, forcing the pipe ends to be inserted deeper into the backing cylinders, so that ventilation pipes can be inserted at the pipe ends respectively. Then, colored non-toxic smoke is sent in through the exhaust channel to observe whether there is any leakage of smoke on the surface of the pipe fittings, and to determine whether there are holes, etc., on the surface of the pipe fittings. Pipe fittings with leakage of smoke are marked. Furthermore, as the two sets of clamping mechanisms advance, the front and rear ends of the pipe fittings are pressed and clamped, which also facilitates the detection and judgment of the compressive strength of the pipe fittings, and is conducive to realizing the diversity of pipe fitting detection.

[0014] This invention features a rectangular box, a three-pronged gear, and a cross-shaped rotating rod structure. These components work in conjunction with a clamping mechanism. As the clamping plate is continuously pushed in, the clamping mechanism at the rear end of the pipe moves to the three-pronged gear. The three-pronged gear moves parallel to and meshes with the two-pronged gear, thus achieving synchronous rotation of the two-pronged gear. The two-pronged gear drives the cylinder and the pipe to rotate, facilitating comprehensive observation of the outer surface of the pipe and further improving the efficiency of pipe inspection and observation. When the three-pronged gear drives the rotating shaft and the cross-shaped rotating rod to rotate synchronously, the cross-shaped rotating rod alternately rotates into the feeding frame, enabling intermittent feeding from the feeding frame and improving feeding efficiency. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a rear view of the frame plate of the present invention; Figure 4 For the present invention Figure 1 Enlarged view of details in area A in the middle; Figure 5 For the present invention Figure 2 Enlarged view of details in area B; Figure 6 This is a side view of the clamping plate and clamping mechanism of the present invention combined. Figure 7 This is a top cross-sectional view of the clamping mechanism and the exhaust channel of the present invention. Figure 8 This is a three-dimensional structural diagram of the rectangular elongated box of the present invention.

[0017] In the diagram: 1. Workbench; 2. Frame plate one; 3. Frame plate two; 4. Roller; 5. Support plate; 6. Feeding frame; 7. Fixing plate; 8. Gear one; 9. Motor; 10. Clamping plate; 11. Rack; 12. Locking bar; 13. Locking slot; 14. Clamping mechanism; 141. Limiting frame; 142. Insert rod; 143. Insert cylinder; 144. Spring damping shock absorber; 145. Gear two; 146. Ventilation pipe; 15. Exhaust channel; 16. Support cylinder; 161. Locking seat; 162. Support rod; 163. Push rod; 164. Elastic support piece; 17. Rectangular box; 171. Rotating shaft; 172. Gear three; 173. Cross rotating rod. Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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. Example

[0019] Please see Figure 1-8 As shown, a positioning fixture for inspecting tubular automotive parts includes a worktable 1. The worktable 1 consists of a first frame plate 2, a second frame plate 3, and several sets of rollers 4. The first frame plate 2 is located at the rear end of the second frame plate 3, and both ends of the first frame plate 2 extend to the sides of the second frame plate 3. A bracket is fixedly connected to the bottom of both the first frame plate 2 and the second frame plate 3. A backing plate 5 is fixedly installed near the upper middle part of the side of the second frame plate 3 opposite to the first frame plate, and both sides of the backing plate 5 are arc-shaped. Several sets of rollers 4 are rotatably connected to the middle section of the front end face of the first frame plate 2. One end of the roller 4 that overlaps with the rear end face of the second frame plate 3 is rotatably connected to the second frame plate 3. An inclined feeding frame 6 is fixedly installed on the rear end face of the first frame plate 2. A fixing plate 7 is fixedly installed on one side of the first frame plate 2, and the front of the fixing plate 7... A gear 8 is rotatably connected at the center of the end face. The central bearing of gear 8 passes through the fixed plate 7 and is fixedly connected to a motor 9. A clamping plate 10 is slidably connected between frame plate 2 and frame plate 3, located at the upper ends of several sets of roller shafts 4. A rack 11 is fixedly installed on the rear end face of the clamping plate 10. The rear edge of the rack 11 and the front edge of the clamping plate 10 are slidably connected in the transverse grooves opened on the opposite sides of frame plate 2 and frame plate 2, respectively. The rack 11 meshes with gear 8. A retaining strip 12 is horizontally fixedly installed at the center of the upper end face of the clamping plate 10. Several sets of U-shaped retaining grooves 13 are fixedly installed at equal intervals on the upper end face of the retaining strip 12. Several sets of clamping mechanisms 14 are fixedly installed at equal intervals on the upper end face of the clamping plate 10. The clamping mechanisms 14 correspond to the several sets of retaining grooves 13. Two clamping mechanisms 14 that correspond to each other form a group, and the two are symmetrical about the retaining grooves 13. An exhaust channel 15 is provided at the rear end of the clamping mechanism 14.

[0020] First, several sets of automotive pipe fittings are sequentially transported to near the ground via the inclined surface of the feeding frame 6. Then, the pipe fittings are clamped and placed on the surface of the clamping plate 10. When clamping the pipe fittings, the middle section of the pipe fitting is engaged in the slot 13, and its front and rear ends are respectively inserted into the corresponding clamping mechanism 14. The front and rear pipe openings of the pipe fitting are respectively connected to the ventilation pipe 146. The distance between the two sets of clamping mechanisms 14 is adjusted and moved according to the length of the pipe fitting. Multiple sets of pipe fittings are constrained at the upper end of the clamping plate 10 in the above manner for subsequent inspection. Example

[0021] Please see Figure 2 , Figure 5 - Figure 7 As shown, the clamping mechanism 14 includes a limiting frame 141, which is fixedly installed on the upper surface of the clamping plate 10. Insert rods 142 are fixedly installed on both sides of the limiting frame 141 opposite to the clamping strip 12. Insert cylinders 143 are fixedly installed on one side of the clamping strip 12 at corresponding positions to the front and rear of the two sets of insert rods 142. One end of the insert rod 142 is inserted into the inside of the insert cylinder 143. A spring damping shock absorber 144 is fixedly connected to the inner wall of the insert rod 142 and the insert cylinder 143. A gear 145 is rotatably connected inside the limiting frame 141. The top of the gear 145 extends to the outside of the limiting frame 141, and a ventilation pipe 146 is fixedly connected to the center of the gear 145. The front and rear ends of the ventilation pipe 146 extend to the outside of the limiting frame 141, and the rear end of the ventilation pipe 146 is fixedly connected to the exhaust channel 15. A stop cylinder 16 is provided at the center of one side of the limiting frame 141 near the card strip 12, and the front end of the ventilation pipe 146 extends into the inside of the stop cylinder 16. By starting the motor 9, the drive gear 8 rotates counterclockwise. The rack 11, which meshes with the gear 8, moves towards the gap between frame plate 2 and frame plate 3, and simultaneously moves several sets of pipe fittings clamped on the surface of the clamping plate 10. Among them, the pipe fitting closest to the gap between frame plate 2 and frame plate 3, and the clamping mechanism 14 located at the front end of the set of pipe fittings, abut against the curved surface of one side of the abutment plate 5. The limiting frame 141 at the front end of the set of pipe fittings slides along the curved surface to the front end of the abutment plate 5. Due to the abutment, the limiting frame 141 is pushed towards the locking strip 12, and the insertion rod 142 is inserted into the insertion cylinder 143. The spring damping shock absorber 144 is compressed, thereby achieving the limiting effect. The parallel movement of the positioning frame 141 reduces offset and assists in the later return of the positioning frame 141, forcing the pipe ends to be inserted deeper into the cylinder 16 so that the ventilation pipes 146 can be inserted into the pipe ends respectively. Then, colored non-toxic smoke is sent in through the exhaust channel 15 to observe whether there is any leakage of smoke on the surface of the pipe and to determine whether there are holes on the surface of the pipe. Pipes with surface leakage of smoke are marked. Furthermore, as the two sets of clamping mechanisms 14 advance, the front and rear ends of the pipe are pressed and clamped, which also facilitates the detection and judgment of the compressive strength of the pipe and helps to realize the diversity of pipe inspection. Example

[0022] Please see Figure 7 As shown, a retaining seat 161 is fixedly installed at the center of the front and rear inner walls of the retaining cylinder 16, and a retaining rod 162 is hinged inside the retaining seat 161. The retaining rod 162 is inclined with one side higher than the other. The two sets of retaining rods 162 are symmetrical about the center of the retaining cylinder 16. A push rod 163 is hinged to one end of the retaining rod 162 near the opening of the retaining cylinder 16, and one end of the push rod 163 extends to the outside of the retaining cylinder 16. The through-hole of the retaining cylinder 16 is larger than the width of the push rod 163, and an inclined elastic retaining piece 164 is hinged to the inner wall of its through-hole.

[0023] The front and rear ends of the pipe fitting are inserted into the cavity 16. The pipe end section of the pipe fitting passes over the two sets of retainers 161 and presses against the close-to-each end of the two sets of retaining rods 162. Then, under the hinge action of the retaining rods 162 and retainers 161, the two sets of retaining rods 162 are lifted up, forcing their other ends to move towards the outer wall of the pipe fitting along with the push rod 163 until one end of the push rod 163 presses against the outer wall of the pipe fitting. During this process, the push rod 163 is inserted into the cavity 16, its position changes, and it presses against the elastic retaining piece 164 on the through-hole side. The front and rear ends of the pipe fitting are limited in the same way. This limiting method is simple and can effectively reduce the situation of the pipe fitting derailing during transportation and testing. Example

[0024] Please see Figure 2 , Figure 3 and Figure 8 As shown, a rectangular box 17 is fixedly installed near the center of the upper surface of the frame plate 2. Rotary shafts 171 are rotatably connected to the inside of the rectangular box 17 near both sides. The front and rear ends of the rotating shafts 171 extend to the outside of the rectangular box 17, and a gear 3 172 is fixedly installed at the front end of the rotating shaft 171, which is compatible with the rack 11. The rear end of the rotating shaft 171 extends to the upper opening of the feeding frame 6 and a cross-shaped rotating rod 173 is fixedly installed thereon, with one end of the cross-shaped rotating rod 173 penetrating into the inside of the feeding frame 6.

[0025] As the clamping plate 10 is continuously pushed in, when the clamping mechanism 14 located at the rear end of the pipe moves to the gear 172 along with the clamping plate 10, the gear 172 moves parallel to and meshes with the gear 145, thereby realizing the synchronous rotation of the gear 145 and the gear 172. The gear 145 drives the cylinder 16 and the pipe to rotate, thus facilitating all-round observation of the outer surface of the pipe and further improving the efficiency of pipe inspection and observation. When the gear 172 drives the rotating shaft 171 and the cross rod 173 to rotate synchronously, the cross rod 173 rotates alternately into the feeding frame 6, realizing intermittent feeding of the feeding frame 6 and improving the feeding efficiency. After inspection, the pipe fittings and their associated clamping mechanisms 14 are pushed over the frame plate 2 3 by the clamping plate 10. The restrained limiting frame 141 loses the pressure of the abutment plate 5 and resets under the rebound force of the spring damping shock absorber 144. This forces the distance between the front and rear clamping mechanisms 14 to increase, thereby facilitating the removal of all pipe fittings that are found to be defective or of good quality for classification. As an embodiment of the present invention, a positioning fixture for inspecting tubular automotive parts is provided. The operation method of the device specifically includes the following steps: Step 1: First, several sets of automotive pipe fittings are transported to near the ground through the inclined surface of the feeding frame 6. Then, the pipe fittings are clamped and placed on the surface of the clamping plate 10. When clamping the pipe fittings, the middle section of the pipe fitting is engaged in the slot 13, and its front and rear ends are inserted into the corresponding abutment cylinders 16. At this time, the front and rear pipe openings of the pipe fittings are respectively connected to the ventilation pipe 146. The distance between the front and rear abutment cylinders 16 is adjusted and moved according to the length of the pipe fittings. Multiple sets of pipe fittings are constrained at the upper end of the clamping plate 10 in the above manner for subsequent inspection. Step 2: The front and rear ends of the pipe fitting are inserted into the cavity 16. The pipe opening section passes over the two sets of retainers 161 and presses against the close-to-each ends of the two sets of retainers 162. Then, under the hinge action of the retainers 162 and retainers 161, the two sets of retainers 162 lift up, forcing their other ends to move towards the outer wall of the pipe fitting along with the push rod 163 until one end of the push rod 163 presses against the outer wall of the pipe fitting. During this process, the push rod 163 is inserted into the cavity 16, its position changes, and it presses against the elastic retainer 164 on the through-hole side. The front and rear ends of the pipe fitting are limited in the same way. This limiting method is simple and can effectively reduce the situation of the pipe fitting derailing during transport and inspection. Step 3: Next, start the motor 9, which drives the gear 8 to rotate counterclockwise. The rack 11, which meshes with the gear 8, moves towards the gap between the frame plate 2 and the frame plate 3, and simultaneously drives the clamping plate 10 and several sets of pipe fittings clamped on its surface to move. Among them, the pipe fitting closest to the gap between the frame plate 2 and the frame plate 3, and the clamping mechanism 14 located at the front end of the set of pipe fittings, abut against the curved surface of one side of the abutment plate 5. The limiting frame 141 at the front end of the set of pipe fittings slides along the curved surface to the front end of the abutment plate 5. Due to the abutment, the limiting frame 141 is pushed towards the locking strip 12, and the insertion rod 142 is inserted into the insertion cylinder 143. The spring damping shock absorber 144 is compressed, thereby realizing... The parallel movement of the current limiting frame 141 reduces offset and assists in the later return of the limiting frame 141, forcing the pipe ends to be inserted deeper into the cylinder 16 so that the ventilation pipe 146 can be inserted into the pipe ends respectively. Then, colored non-toxic smoke is sent in through the exhaust channel 15 to observe whether there is any leakage of smoke on the surface of the pipe and to determine whether there are holes on the surface of the pipe. Pipes with surface leakage of smoke are marked. Furthermore, as the front and rear clamping mechanisms 14 advance, the front and rear ends of the pipe are pressed and clamped, which also facilitates the detection and judgment of the compressive strength of the pipe and helps to realize the diversity of pipe detection. Step 4: As the clamping plate 10 is continuously pushed in, when the clamping mechanism 14 located at the rear end of the pipe moves to gear 3 172 along with the clamping plate 10, gear 3 172 moves parallel to and meshes with gear 2 145, thereby realizing the synchronous rotation of gear 2 145 and gear 3 172. Gear 2 145 drives the abutment cylinder 16 and the pipe to rotate, thereby facilitating all-round observation of the outer surface of the pipe and further improving the efficiency of pipe inspection and observation. When gear 3 172 drives the rotating shaft 171 and the cross rotating rod 173 to rotate synchronously, the cross rotating rod 173 rotates alternately into the feeding frame 6, realizing intermittent feeding of the feeding frame 6 and improving feeding efficiency. Step 5: After inspection, the pipe fittings and the associated clamping mechanism 14 are pushed over the frame plate 2 3 by the clamping plate 10, and the restrained limiting frame 141 loses the pressure of the abutment plate 5 and resets under the rebound force of the spring damping shock absorber 144, forcing the distance between the front and rear clamping mechanisms 14 to be widened, so as to facilitate the removal of all the pipe fittings that are found to be defective and those that are of good quality for classification.

[0026] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning fixture for inspecting tubular automotive parts, characterized in that: The system includes a workbench (1), which is composed of a frame plate one (2), a frame plate two (3), and several sets of rollers (4). The frame plate one (2) is located at the rear end of the frame plate two (3), and both ends of the frame plate one (2) extend to the sides of the frame plate two (3). The bottom of the frame plate one (2) and the frame plate two (3) are fixedly connected to a bracket. A support is fixedly installed on the side of the frame plate two (3) opposite to the frame plate one (2) near the middle and upper end. Plate (5), and both sides of the abutment plate (5) are arc-shaped. Several sets of roller shafts (4) are rotatably connected to the middle section of the front end face of the first frame plate (2). One end of the roller shaft (4) that overlaps with the rear end face of the second frame plate (3) is rotatably connected to the second frame plate (3). An inclined feeding frame (6) is fixedly installed on the rear end face of the first frame plate (2). A fixing plate (7) is fixedly installed on one side of the first frame plate (2). A gear (8) is rotatably connected at the center of the front end face of the fixing plate (7). The central bearing of the gear (8) passes through the fixing plate (7) and is fixedly connected to a motor (9). A clamping plate (10) is slidably connected between the first frame plate (2) and the second frame plate (3) and at the upper end of several sets of roller shafts (4). A rack (11) is fixedly installed on the rear end face of the clamping plate (10). The rear edge of the rack (11) and the front edge of the clamping plate (10) are slidably connected to the second frame plate (3). The rack (11) meshes with the gear (8) in the horizontal groove opened on the opposite side of the frame plate (2). A clip (12) is fixedly installed horizontally at the center of the upper end face of the clamping plate (10). Several sets of U-shaped slots (13) are fixedly installed at equal distances on the upper end face of the clip (12). Several sets of clamping mechanisms (14) are fixedly installed at equal distances on the upper end face of the clamping plate (10). The clamping mechanisms (14) correspond to the front and back of the several sets of slots (13). The clamping mechanism (14) includes a limiting frame (141), which is fixedly installed on the upper surface of the clamping plate (10). A plug rod (142) is fixedly installed on both sides of the limiting frame (141) opposite to the clamping strip (12). A plug cylinder (143) is fixedly installed on one side of the clamping strip (12) and at the corresponding front and rear positions of the two sets of plug rods (142). One end of the plug rod (142) is inserted into the inside of the plug cylinder (143). A spring damping shock absorber (144) is fixedly connected to the inner wall of the plug rod (142) and the plug cylinder (143). A gear two (145) is rotatably connected inside the limiting frame (141). The top of the gear two (145) extends to the outside of the limiting frame (141), and a ventilation pipe (146) is fixedly connected to the center of the gear two (145).

2. The positioning fixture for inspecting tubular automotive parts according to claim 1, characterized in that, The two clamping mechanisms (14) corresponding to the front and rear are a group, and the two are symmetrical about the slot (13). An exhaust channel (15) is provided at the rear clamping mechanism (14).

3. A positioning fixture for inspecting tubular automotive parts according to claim 2, characterized in that, The front and rear ends of the ventilation pipe (146) extend to the outside of the limiting frame (141), and the rear end of the ventilation pipe (146) is fixedly connected to the exhaust channel (15). A stop cylinder (16) is provided at the center of one side of the limiting frame (141) near the card strip (12), and the front end of the ventilation pipe (146) extends into the inside of the stop cylinder (16).

4. A positioning fixture for inspecting tubular automotive parts according to claim 3, characterized in that, A retainer (161) is fixedly installed at the center of the front and rear inner walls of the abutment cylinder (16), and a retainer (162) is hinged inside the retainer (161). The retainer (162) is inclined with one side higher than the other. The two sets of retainers (162) are symmetrical about the center of the abutment cylinder (16). A push rod (163) is hinged to one end of the retainer (162) near the opening of the abutment cylinder (16), and one end of the push rod (163) extends to the outside of the abutment cylinder (16). The through-hole of the abutment cylinder (16) is larger than the width of the push rod (163), and an inclined elastic retainer (164) is hinged to the inner wall of its through-hole.

5. A positioning fixture for inspecting tubular automotive parts according to claim 4, characterized in that, A rectangular box (17) is fixedly installed on the upper surface of the frame plate (2) near the center. The rectangular box (17) is rotatably connected to the two sides of the interior. The front and rear ends of the rotating shaft (171) extend to the outside of the rectangular box (17). A gear (172) is fixedly installed at the front end of the rotating shaft (171). The gear (172) is adapted to the rack (11).

6. A positioning fixture for inspecting tubular automotive parts according to claim 5, characterized in that, The rear end of the rotating shaft (171) extends to the upper opening of the feeding frame (6) and is fixedly installed with a cross rotating rod (173), and one end of the cross rotating rod (173) penetrates into the inside of the feeding frame (6).

7. A positioning fixture for inspecting tubular automotive parts according to claim 6, characterized in that, The specific operation method of this positioning fixture includes the following steps: Step 1: First, several sets of automotive pipe fittings are transported to near the ground through the inclined surface of the feeding frame (6). Then, the pipe fittings are clamped and placed on the surface of the clamping plate (10). When clamping the pipe fittings, the middle section of the pipe fitting is clamped in the slot (13), and its front and rear ends are inserted into the corresponding abutment cylinder (16). At this time, the front and rear pipe openings of the pipe fittings are respectively connected to the ventilation pipe (146). The distance between the front and rear abutment cylinders (16) is adjusted and moved according to the length of the pipe fittings. Multiple sets of pipe fittings are used to limit the upper end of the clamping plate (10) in the above manner for subsequent inspection. Step 2: The front and rear ends of the pipe fitting are inserted into the inside of the abutment cylinder (16). The pipe opening section of the pipe fitting passes over the two sets of retainers (161) and presses against the close-to-each end of the two sets of abutment rods (162). Then, under the hinge action of the abutment rods (162) and retainers (161), the two sets of abutment rods (162) lift up, forcing their other ends to move towards the outer wall of the pipe fitting along with the push rod (163) until one end of the push rod (163) presses against the outer wall of the pipe fitting. During this process, the push rod (163) is inserted into the inside of the abutment cylinder (16), its position changes, and it presses against the elastic abutment plate (164) on the side of the through-hole. The front and rear ends of the pipe fitting are limited in the same way. This limiting method is simple and can effectively reduce the situation of the pipe fitting derailing during the conveying and testing process. Step 3: Next, start the motor (9), which drives the gear 1 (8) to rotate counterclockwise. The rack (11) meshing with the gear 1 (8) moves towards the gap between the frame plate 1 (2) and the frame plate 2 (3), and simultaneously drives the clamping plate (10) and several sets of pipe fittings clamped on its surface to move. Among them, the pipe fitting closest to the distance between the frame plate 1 (2) and the frame plate 2 (3) and the clamping mechanism (14) located at the front end of the set of pipe fittings abut against the curved surface on one side of the abutment plate (5). The limiting frame (141) at the front end of the set of pipe fittings slides along the curved surface to the front end of the abutment plate (5). Because the limiting frame (141) is abutted, it is pushed towards the locking strip (12). The insertion rod (142) is inserted into the insertion cylinder (143). The spring damping shock absorber (144) is compressed to achieve parallel movement of the limit frame (141), reduce offset, and assist the limit frame (141) in the later return to its original position, forcing the pipe ends to be inserted into the inner depth of the cylinder (16) so that the ventilation pipe (146) can be inserted into the pipe ends respectively. Then, colored non-toxic smoke is sent in through the exhaust channel (15) to observe whether there is any leakage of smoke on the surface of the pipe and to determine whether there are any holes on the surface of the pipe. Pipes with leakage of smoke on the surface are marked. As the two sets of clamping mechanisms (14) advance, the front and rear ends of the pipe are pressed and clamped, which also makes it convenient to test and judge the compressive strength of the pipe and facilitates the diversification of pipe testing. Step 4: As the clamping plate (10) is continuously pushed in, when the clamping mechanism (14) located at the rear end of the pipe moves to the gear three (172) along with the clamping plate (10), the gear three (172) moves in parallel and meshes with the gear two (145), thereby realizing the synchronous rotation of the gear two (145) and the gear three (172). The gear two (145) drives the cylinder (16) and the pipe to rotate, thus facilitating the all-round observation of the outer surface of the pipe and further improving the efficiency of pipe inspection and observation. When the gear three (172) drives the rotating shaft (171) and the cross rotating rod (173) to rotate synchronously, the cross rotating rod (173) rotates alternately to the inside of the feeding frame (6), realizing the intermittent feeding of the feeding frame (6) and improving the feeding efficiency. Step 5: After inspection, the pipe fittings and the associated clamping mechanism (14) are pushed over the frame plate 2 (3) by the clamping plate (10), and the restrained limit frame (141) loses the pressure of the abutment plate (5) and resets under the rebound force of the spring damping shock absorber (144), forcing the distance between the front and rear clamping mechanisms (14) to be widened, so as to facilitate the removal of all the pipe fittings that are found to be defective and those that are of good quality for classification.

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