A welding and inspection integrated machine for shock absorbers

Abstract

The present invention relates to a welding and inspection integrated machine for shock absorbers, comprising a housing, a welding robot and a rotating station, wherein the welding robot and the rotating station are arranged in the housing, and further comprising a chassis, a tensioning assembly, a spring disk positioning clamping assembly and a U-shaped part positioning assembly, wherein the chassis is installed on the rotating station, the tensioning assembly is vertically installed at the hollow part of the chassis, a workpiece is sleeved on the tensioning assembly, a spring disk is installed in the middle of the workpiece, a U-shaped part is installed on the top of the workpiece, the spring disk positioning clamping assembly is used to clamp the spring disk, the U-shaped part positioning assembly is used to position the U-shaped part, and the spring disk positioning clamping assembly and the U-shaped part positioning assembly cooperate to make the center line of the spring disk and the center line of the U-shaped part be in the same vertical plane. By using the spring disk positioning clamping assembly and the U-shaped part positioning assembly to cooperate, the spring disk and the U-shaped part preliminarily assembled on the workpiece are subjected to orientation detection, thereby realizing a welding and inspection integrated design, avoiding welding of workpieces that do not meet the assembly accuracy, and reducing costs.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to an integrated welding and inspection machine for a shock absorber. Background Art

[0002] Automobile shock absorbers, also known as shock absorbers or shock absorbers, are key components of the automobile suspension system. Their main function is to absorb and reduce the impact and vibration caused by uneven road surfaces during driving, thereby improving ride comfort and increasing vehicle stability.

[0003] The shock absorber is generally composed of a shock absorber cylinder, a spring disk and a U-shaped frame welded together. For example, application number 202410702089.X discloses a fully automatic welding processing line and processing method for shock absorber parts. However, the above welding structure can only realize the normal automatic welding of the shock absorber cylinder, spring disk and U-shaped parts. The existing welding equipment is similar. Its defect is that the automatic or manual primary assembly of a large number of shock absorbers, spring disks and U-shaped frames has a large precision deviation. After the shock absorber is assembled, it is sent to the welding to weld the shock absorber cylinder, spring disk and U-shaped frame into one. During the inspection process, the scrap rate is extremely high, which increases the cost of the customer's welding process. It is unacceptable for the customer's cost control and precision control, so it needs further improvement. Summary of the invention

[0004] Based on this, it is necessary to provide an all-in-one welding inspection machine for shock absorbers to address the above problems.

[0005] A welding and inspection integrated machine for shock absorbers comprises a casing, a welding robot and a rotating station, wherein the welding robot and the rotating station are arranged in the casing, and the welding robot and the rotating station are arranged in a one-to-one correspondence, and further comprises a chassis, a tightening assembly, a spring disk positioning clamping assembly and a U-shaped part positioning assembly, wherein the chassis is installed on the rotating station, the middle of the chassis is hollowed out, the tightening assembly is vertically installed in the hollow part of the chassis, a workpiece is sleeved on the tightening assembly, the middle part of the workpiece is equipped with a spring disk, the top of the workpiece is equipped with a U-shaped part, the spring disk positioning clamping assembly is used to clamp the spring disk, the U-shaped part positioning assembly is used to position the U-shaped part, the spring disk is arranged obliquely, and the spring disk positioning clamping assembly and the U-shaped part positioning assembly cooperate so that the center line of the spring disk and the center line of the U-shaped part are in the same vertical plane.

[0006] Preferably, the spring disk positioning and clamping assembly includes a positioning pin, a plurality of distance sensors and a plurality of clamps, wherein the positioning pin and the plurality of distance sensors are vertically mounted on the chassis, the positioning pin passes through the positioning hole on the spring disk, the sensing head of the distance sensor is located directly below the spring disk, and a plurality of clamps are mounted on the edge of the chassis, and the clamps are used to clamp the edge of the spring disk.

[0007] Preferably, the clamp includes a bracket, a first cylinder and a flip clamp, the bracket is installed on the side of the chassis, the first cylinder is installed on the bracket, and the output end faces upward and is connected to the flip clamp, and the flip clamp clamps the edge of the spring disk.

[0008] Preferably, a welding chip stopper is installed on the flip clamp.

[0009] Preferably, the expansion assembly includes a driving member, a sleeve, a lifting rod, and a plurality of expansion blocks. The driving member is installed in the chassis, the sleeve is installed on the chassis, the lifting rod is movably inserted in the sleeve, the output end of the driving member is connected to the lifting rod, driving the lifting rod to rise and fall in the sleeve, an avoidance groove is provided on the upper end side wall of the sleeve, a plurality of expansion blocks are movably installed in the avoidance groove in a one-to-one correspondence, a ring spring is sleeved on the outer side of the expansion block, the upper end of the lifting rod is in a pointed cone shape, and the upper end of the lifting rod is movably abutted against the inner side of the expansion block.

[0010] Preferably, the sleeve has an air inlet at the bottom and an air outlet at the top, and the air inlet and the air outlet are connected.

[0011] Preferably, the sleeve is rotatable.

[0012] Preferably, the U-shaped part positioning assembly includes a second cylinder, a steering gear, a bracket and a pad. The second cylinder is connected to the chassis, and the output end of the second cylinder is connected to the bracket through the steering gear to drive the bracket to rotate. The pad is installed at the front end of the bracket, and the pad is embedded in the U-shaped part.

[0013] Preferably, a third cylinder is installed on the bracket, and the output end of the third cylinder is connected to the cushion block through a connecting rod to drive the cushion block to approach or move away from the U-shaped piece.

[0014] Preferably, a sensor is arranged on the cushion block, a spring head is arranged on the side of the cushion block, and the sensing rod passes through the cushion block and is connected to the spring head.

[0015] The benefit of the present invention lies in that the spring disk positioning clamping assembly cooperates with the U-shaped part positioning assembly, which can not only clamp the workpiece during the welding process, but also cooperate with each other to perform orientation detection on the spring disk and U-shaped part preliminarily assembled on the workpiece, thereby realizing an integrated welding and inspection design. While not increasing the tooling cost, it improves the detection function of the welding incoming workpiece, avoids welding of workpieces that do not meet the assembly accuracy, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of a shock absorber welding and inspection integrated machine according to one embodiment;

[0017] Figure 2It is a schematic diagram of the assembly of a partial welding and inspection machine for shock absorbers and a workpiece;

[0018] Figure 3 It is a schematic side view of the workpiece;

[0019] Figure 4 It is a top view of the workpiece;

[0020] Figure 5 A schematic diagram of a partial explosion of a welding inspection machine for shock absorbers;

[0021] Figure 6 is a three-dimensional schematic diagram of the fixture;

[0022] Figure 7 It is a three-dimensional schematic diagram of the U-shaped piece positioning assembly;

[0023] Reference numerals:

[0024] 100- housing, 200- welding robot, 300- rotating station, 400- workpiece, 401- spring disk, 402- U-shaped part, 1- chassis, 2- expansion assembly, 21- driving part, 22- sleeve, 221- avoidance groove, 222- air inlet, 223- air outlet, 23- lifting rod, 24- expansion block, 3- spring disk positioning clamping assembly, 31- positioning pin, 32- distance sensor, 33- fixture, 331- bracket, 332- first cylinder, 333- flip clamp, 3331- welding chip stopper, 4- U-shaped part positioning assembly, 41- second cylinder, 42- steering gear, 43- bracket, 431- third cylinder, 44- pad, 441- sensor, 442- spring head, 443- sensor rod. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] like Figures 1 to 5As shown, a shock absorber welding and inspection integrated machine includes a housing 100, a welding robot 200 and a rotating station 300, wherein the welding robot 200 and the rotating station 300 are arranged in the housing 100, and the welding robot 200 and the rotating station 300 are arranged one by one, and further includes a chassis 1, an expansion assembly 2, a spring disk positioning clamping assembly 3 and a U-shaped member positioning assembly 4, wherein the chassis 1 is installed on the rotating station 300, the spring disk positioning clamping assembly 3 and the U-shaped member positioning assembly 4 are installed on the edge of the chassis 1, the middle of the chassis 1 is hollow, and the expansion assembly 2 is arranged on the rotating station 300. The tightening assembly 2 is vertically installed in the hollow part of the chassis 1, and the workpiece 400 is sleeved on the tightening assembly 2. The middle part of the workpiece 400 is equipped with a spring disk 401, and the top of the workpiece 400 is equipped with a U-shaped part 402. The spring disk positioning clamping assembly 3 is used to clamp the spring disk 401, and the U-shaped part positioning assembly 4 is used to position the U-shaped part 402. The spring disk 401 is tilted, and the spring disk positioning clamping assembly 3 and the U-shaped part positioning assembly 4 cooperate to make the center line of the spring disk 401 and the center line of the U-shaped part 402 in the same vertical plane. Specifically, in this embodiment, the welding and inspection integrated machine is a double-station design, that is, there are two sets of welding robots 200 and rotating stations 300, and the welding robots 200 and the rotating stations 300 are arranged one by one, which is convenient for welding the workpiece 400 thereon, and the double-station operation improves the welding efficiency. In other embodiments, other numbers of stations can also be designed according to needs, which are not specifically limited here. The rotating station 300 can drive the chassis 1 installed thereon to rotate, and then drive the workpiece 400 to rotate, so as to facilitate manual or mechanical insertion or removal of the workpiece 400. The chassis 1 is hollowed out in the middle, so as to facilitate the placement of the expansion assembly 2. When loading, the workpiece 400 is directly mounted on the expansion assembly 2, and the functional part of the expansion assembly 2 is expanded outward, so as to expand the workpiece 400, so as to prevent the workpiece 400 from being displaced by vibration during the welding process, resulting in reduced welding accuracy. The top of the workpiece 400 is equipped with a U-shaped part 402, and the middle is equipped with a spring disk 401. When assembling, they are assembled by relying on the stress of the U-shaped part 402 and the spring disk 401 themselves, which is relatively loose, so welding operations are required to weld the spring disk 401 and the U-shaped part 402 to the barrel of the workpiece 400 as a whole. It should be noted that the top of the barrel of the workpiece 400 is provided with a sealing gasket, which is welded to the barrel of the workpiece to seal the upper end of the workpiece 400. Therefore, three welding operations are required.Before welding, because the spring disk 401 is assembled at an angle, it is necessary to detect and ensure that the center line of the spring disk 401 and the center line of the U-shaped part 402 are in the same vertical plane. We use the spring disk positioning clamping assembly 3 to clamp the spring disk 401 and the U-shaped part positioning assembly 4 to position the U-shaped part 402. When the spring disk positioning clamping assembly 3 and the U-shaped part positioning assembly 4 cooperate to detect that the center lines of the spring disk 401 and the U-shaped part 402 are in the same vertical plane, it indicates that there is no assembly misalignment between the spring disk 401 and the U-shaped part 402, and subsequent welding operations can be performed. If not, the background controller issues a warning message, and the spring disk positioning clamping assembly 3 and the U-shaped part positioning assembly 4 are separated from the workpiece 400, and the material is unloaded to avoid welding operations on the defective semi-finished workpiece 400 with assembly misalignment, thereby saving welding costs, avoiding wasting welding time on the defective workpiece 400, and ensuring the welding efficiency of the good workpiece 400.

[0029] like Figure 2 , 5 As shown, the spring disk positioning and clamping assembly 3 includes a positioning pin 31, a plurality of distance sensors 32 and a plurality of clamps 33. The positioning pin 31 and the plurality of distance sensors 32 are vertically mounted on the chassis 1. The positioning pin 31 passes through the positioning hole on the spring disk 401. The sensing head of the distance sensor 32 is located directly below the spring disk 401. The plurality of clamps 33 are mounted on the edge of the chassis 1. The clamps 33 are used to clamp the edge of the spring disk 401. Specifically, in this embodiment, when the workpiece 400 is loaded and assembled, the positioning pin 31 passes through the positioning hole on the disk surface of the spring disk 401 to locate and determine the orientation of the spring disk 401. In this embodiment, because the disk surface of the spring disk 401 is inclined, we use three distance sensors 32, which are distributed in a ring shape below the spring disk 401. The distance sensor 32 is used to detect the height of the lower disk surface of the spring disk 401, and feed back the detection information to the background controller. If the distance between the disk surface of the spring disk 401 and the distance sensor 32 is within the preset range, it means that the primary assembly of the spring disk 401 is qualified. At this time, the background controller controls the clamp 33 to clamp the spring disk 401 to avoid displacement of the spring disk 401 during subsequent welding operations. If not, it means that the spring disk 401 is unqualified and misaligned, and the workpiece 400 needs to be cut and reassembled to avoid welding operations on unqualified workpieces, avoid wasting semi-finished raw materials, and reduce costs.

[0030] like Figures 5 and 6As shown, the clamp 33 includes a bracket 331, a first cylinder 332 and a flip clamp 333. The bracket 331 is installed on the side of the chassis 1, and the first cylinder 332 is installed on the bracket 331, and the output end faces upward and is connected to the flip clamp 333. The flip clamp 333 clamps the edge of the spring disk 401. Specifically, in this embodiment, the output end of the first cylinder 332 is extended and retracted, which can drive the flip clamp 333 to rotate, and cooperate with the boss on the top of the bracket 331 to clamp the edge of the spring disk 401. This type of tooling clamping structure is relatively simple and will not be described in detail here.

[0031] like Figure 6 As shown, a welding chip stopper 3331 is installed on the flip clamp 333. Specifically, the welding chip stopper 3331 is used to prevent sparks from flying during welding.

[0032] like Figure 5 As shown, the expansion assembly 2 includes a driving member 21, a sleeve 22, a lifting rod 23, and a plurality of expansion blocks 24. The driving member 21 is installed in the chassis 1, the sleeve 22 is installed on the chassis 1, the lifting rod 23 is movably inserted in the sleeve 22, the output end of the driving member 21 is connected to the lifting rod 23, driving the lifting rod 23 to rise and fall in the sleeve 22, the upper end side wall of the sleeve 22 is provided with an avoidance groove 221, and a plurality of expansion blocks 24 are movably installed in the avoidance groove 221 in a one-to-one correspondence, the outer side of the expansion block 24 is sleeved with a ring spring, the upper end of the lifting rod 23 is in a pointed cone shape, and the upper end of the lifting rod 23 is movably abutted against the inner side of the expansion block 24. Specifically, in this embodiment, the driving member 21 can be a cylinder, or an electric push rod, etc., as long as it can drive the lifting rod 23 to rise and fall in the sleeve 22. When the lifting rod 23 rises, the pointed cone at the top contacts the inner side of the expansion block 24. If it continues to rise, it can squeeze the expansion block 24 and expand it outward along the radial direction of the sleeve 22. In order to prevent the expansion block 24 from falling out of the avoidance groove 221, we use a ring spring clamp on the outside of several expansion blocks 24. When it expands outward, the ring spring is stressed and stretches synchronously. The expansion block 24 can be used to expand the barrel of the workpiece 400 from the inside to avoid vibration displacement of the workpiece 400 during welding, and maintain the suspended height of the workpiece 400 without the need for other clamping fixtures.

[0033] like Figure 5 As shown, the sleeve 22 has an air inlet 222 at the bottom, and an air outlet 223 at the top, and the air inlet 222 is connected to the air outlet 223. Specifically, during welding, the external air pipe passes nitrogen into the sleeve 22 through the air inlet 222, and the nitrogen is discharged from the air outlet 223 at the top of the sleeve 22, thereby reducing the oxidation of the weld of the gasket used for sealing the top of the welding workpiece 400, which helps to reduce the oxidation corrosion problem during welding and improve the welding quality.

[0034] like Figure 5 As shown, the sleeve 22 is rotatable. Specifically, the sleeve 22 can be driven to rotate by an external drive through a belt or gear structure, thereby driving the workpiece 400 to rotate, and fine-tuning the orientation of the workpiece 400 so that the U-shaped part 402 is aligned with the U-shaped part positioning assembly 4. It can be understood that when the workpiece 400 is tensioned by the expansion block 24, the inner side of the expansion block 24 is provided with radial support by the top of the lifting rod 23. When the expansion block 24 rotates with the sleeve 22, the lifting rod 23 remains stationary. In order to reduce the friction force generated when the expansion block 24 rotates relative to the lifting rod 23, we set a circle of balls on the outer periphery of the lifting rod 23, so that the expansion block 24 is in rolling friction contact with the outer periphery of the lifting rod 23, which can not only ensure the support of the expansion block 24, but also reduce the friction resistance.

[0035] like Figure 5 , 7 As shown, the U-shaped member positioning assembly 4 includes a second cylinder 41, a steering gear 42, a bracket 43 and a cushion block 44. The second cylinder 41 is connected to the chassis 1. The output end of the second cylinder 41 is connected to the bracket 43 through the steering gear 42, driving the bracket 43 to rotate. The cushion block 44 is installed at the front end of the bracket 43, and the cushion block 44 is embedded in the U-shaped member 402. Specifically, in this embodiment, when the output end of the second cylinder 41 is extended and retracted, the steering gear 42 is used to convert the linear motion into rotational motion, so that the bracket 43 is turned over, and the bracket 43 rotates. When the bracket 43 is kept horizontal, the cushion block 44 installed at the front end of the bracket 43 can be embedded in the U-shaped member 402 to perform primary positioning on the U-shaped member 402.

[0036] like Figure 5 , 7 As shown, the bracket 43 is installed with a third cylinder 431, and the output end of the third cylinder 431 is connected to the cushion block 44 through a connecting rod, driving the cushion block 44 to move closer to or away from the U-shaped member 402. Specifically, the third cylinder 431 drives the cushion block 44 to fine-tune the displacement forward and backward through the connecting rod, so that the cushion block 44 moves closer to or away from the U-shaped member 402, and avoids the cushion block 44 from colliding with the top of the U-shaped member 402 during the swinging process of the bracket 43.

[0037] like Figure 5 , 7As shown, a sensor 441 is provided on the cushion block 44, a spring head 442 is provided on the side of the cushion block 44, and a sensing rod 443 penetrates the cushion block 44 and is connected to the spring head 442. Specifically, when the cushion block 44 moves toward the bottom of the U-shaped member 402, the spring head 442 is squeezed by the side wall of the U-shaped member 402, and retracts into the cushion block 44, driving the sensing rod 443 to move horizontally. When the sensing rod 443 moves to the sensing route directly facing the sensor 441, the sensor 441 sends a signal to the background controller, and the background controller then controls the third cylinder 431 to stop working, and the cushion block 44 stops moving. The spring head 442, the sensing rod 443 cooperate with the sensor 441 to accurately control the position of the cushion block 44, so as to avoid the cushion block 44 from squeezing the inner bottom of the hard top U-shaped member 402.

[0038] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A welding and inspection integrated machine for shock absorbers, comprising a housing, a welding robot and a rotating station, wherein the welding robot and the rotating station are arranged in the housing, and the welding robot and the rotating station are arranged one by one, characterized in that: The invention also includes a chassis, a tensioning assembly, a spring disk positioning clamping assembly and a U-shaped part positioning assembly, the chassis is installed on a rotating workstation, the middle of the chassis is hollowed out, the tensioning assembly is vertically installed at the hollow part of the chassis, the workpiece is sleeved on the tensioning assembly, the middle part of the workpiece is equipped with a spring disk, the top of the workpiece is equipped with a U-shaped part, the spring disk positioning clamping assembly is used to clamp the spring disk, the U-shaped part positioning assembly is used to position the U-shaped part, the spring disk is tilted, the spring disk positioning clamping assembly and the U-shaped part positioning assembly cooperate so that the center line of the spring disk and the center line of the U-shaped part are in the same vertical plane, the spring disk positioning clamping assembly includes a positioning pin, a plurality of distance sensors and a plurality of clamps, the positioning pin and the plurality of distance sensors are vertically installed on the chassis, the positioning pin passes through the positioning hole on the spring disk, the distance sensor The sensing head of the device is located directly below the spring disk, and a number of clamps are installed on the edge of the chassis, and the clamps are used to clamp the edge of the spring disk. The U-shaped part positioning assembly includes a second cylinder, a steering gear, a bracket and a pad. The second cylinder is connected to the chassis, and the output end of the second cylinder is connected to the bracket through the steering gear to drive the bracket to rotate. The pad is installed at the front end of the bracket, and the pad is embedded in the U-shaped part. Three distance sensors are used, which are distributed in a ring shape below the spring disk. The distance sensor is used to detect the height of the lower disk surface of the spring disk and feed back the detection information to the background controller. If the distance between the disk surface of the spring disk and the distance sensor is within the preset range, it means that the primary assembly of the spring disk is qualified, and the background controller controls the clamp to clamp the spring disk; if not, it means that the spring disk assembly is unqualified and there is misalignment, and the workpiece needs to be cut for reassembly.

2. The integrated welding and inspection machine for shock absorbers according to claim 1, characterized in that: The clamp comprises a bracket, a first cylinder and a flip clamp, wherein the bracket is mounted on the side of the chassis, the first cylinder is mounted on the bracket, and the output end faces upward and is connected to the flip clamp, and the flip clamp clamps the edge of the spring disk.

3. The integrated welding and inspection machine for shock absorbers according to claim 2, characterized in that: A welding chip blocking plate is installed on the flip clamp.

4. The integrated welding and inspection machine for shock absorbers according to claim 1, characterized in that: The expansion assembly includes a driving member, a sleeve, a lifting rod, and a plurality of expansion blocks. The driving member is installed in the chassis, the sleeve is installed on the chassis, the lifting rod is movably inserted in the sleeve, the output end of the driving member is connected to the lifting rod, driving the lifting rod to rise and fall in the sleeve, an avoidance groove is provided on the upper end side wall of the sleeve, a plurality of expansion blocks are movably installed in the avoidance groove in a one-to-one correspondence, a ring spring is sleeved on the outer side of the expansion block, the upper end of the lifting rod is in a pointed cone shape, and the upper end of the lifting rod is movably abutted against the inner side of the expansion block.

5. The integrated welding and inspection machine for shock absorbers according to claim 4, characterized in that: The lower part of the sleeve is provided with an air inlet hole, and the top of the sleeve is provided with an air outlet hole, and the air inlet hole is connected with the air outlet hole.

6. The integrated welding and inspection machine for shock absorbers according to claim 5, characterized in that: The sleeve is rotatable.

7. The integrated welding and inspection machine for shock absorbers according to claim 1, characterized in that: A third cylinder is installed on the bracket, and an output end of the third cylinder is connected to a cushion block through a connecting rod, so as to drive the cushion block to approach or move away from the U-shaped piece.

8. The integrated welding and inspection machine for shock absorbers according to claim 1, characterized in that: The cushion block is provided with a sensor, a spring head is provided on the side of the cushion block, and a sensing rod penetrates the cushion block and is connected with the spring head.

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