An automatic assembly production line and process for automobile door hinges

Abstract

The present invention discloses an automatic assembly production line and process for automobile door hinges, including a frame. An assembly device, a punching device, a locating pin installation device, and a product assembly function testing device are sequentially arranged on the frame from left to right. The assembly device includes an annular circulating conveyor line, a number of toolings driven by the annular circulating conveyor line to move between various workstations, a rivet feeding mechanism, a bushing feeding mechanism, an artificial position, a bushing flanging mechanism, a first spin riveting mechanism, a forging turning mechanism, a gasket feeding mechanism, a second spin riveting mechanism, an angle correction mechanism, and a blanking conveyor mechanism arranged in sequence around the annular circulating conveyor line. By the above method, the structure of the present invention is compact and the layout is reasonable. It can automatically assemble automobile door hinges, ensure the consistency of product assembly, can automatically punch holes and install locating pins, and can conduct function testing on the finished products to ensure product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of automated production equipment, and particularly to an automatic assembly production line and process for automotive door hinges. Background Art

[0002] Automotive doors are mainly fixed to the vehicle body by hinges. During use, high requirements are placed on their static and vertical rigidity strength, and they are closely related to personal safety. Automotive door hinges involve many parts and complex assembly processes, including the assembly and riveting of forged rivets, the flanging of the assembly of stamped parts and bushings, the rotational connection of forged parts and stamped parts, and the assembly of gaskets and positioning pins. Most traditional automotive door hinges are assembled using multiple devices in cooperation, which occupies a large space, has cumbersome operations, requires manual handling and repositioning multiple times, and the multiple repositioning processes are likely to affect the installation accuracy of the finished product, and the assembly efficiency is low. In addition, functional testing of the assembled finished product is required. The stamped part needs to be able to rotate smoothly within a certain angle relative to the forged part. Currently, most are manually detected, making it difficult to ensure the accuracy of the detection. In addition, before discharging, there are requirements for the angle between the vertical planes of the stamped part and the forged part.

[0003] Based on the above defects and deficiencies, it is necessary to improve the existing technology and design an automatic assembly production line and process for automotive door hinges. Summary of the Invention

[0004] The main technical problem to be solved by the present invention is to provide an automatic assembly production line and process for automotive door hinges, which has a compact structure and a reasonable layout, can automatically assemble automotive door hinges, ensure the consistency of product assembly, can automatically punch holes for installing positioning pins, and can perform functional tests on the finished product to ensure product quality.

[0005] To solve the above technical problem, one technical solution adopted by the present invention is: to provide an automatic assembly production line for automotive door hinges, which includes a frame. An assembly device, a punching device, a positioning pin installation device, and a product assembly function testing device are sequentially arranged on the frame from left to right. The assembly device includes an annular circulating conveyor line, a number of toolings driven by the annular circulating conveyor line to move between workstations, a rivet feeding mechanism, a bushing feeding mechanism, an artificial position, a bushing flanging mechanism, a first riveting mechanism, a forged part flipping mechanism, a gasket feeding mechanism, a second riveting mechanism, an angle correction mechanism, and a blanking conveyor mechanism arranged in sequence around the annular circulating conveyor line.

[0006] Preferably, the tooling includes a bottom plate, a mounting sleeve installed on the bottom plate for positioning the rivet, a clamping structure for positioning the forged part, a lifting column for positioning the bushing, and a profiling mounting plate for positioning the stamped part. The lifting column and the profiling mounting plate are elastically arranged through elastic columns.

[0007] Preferably, the bushing flanging mechanism includes a flanging bracket, a flanging cylinder installed on the flanging bracket, a lifting plate driven downward by the flanging cylinder, a pressing sleeve installed below the lifting plate, and a pressing head elastically connected to the pressing sleeve through a spring, and the lower part of the pressing head is provided with a socket part and a flanging part that can be inserted into the bushing in sequence with increasing axial diameter from bottom to top.

[0008] Preferably, the forging flipping mechanism includes a side extension structure, a lifting structure, a material picking robot and a rotating device, the side extension structure and the lifting structure are extended to open the clamping structure on the tooling, the material picking robot includes a clamping cylinder for grabbing the forging and a Z-axis drive module for driving the clamping cylinder to move upward, the Z-axis drive module is installed on the X-axis drive module, and the X-axis drive module is fixed to the frame through a bracket, the rotating device includes a first push-pull cylinder, a first push plate, a follow-up turntable, a second push-pull cylinder, a second push plate, a profiling clamp block and a rotating motor, the first push-pull cylinder drives the first push plate to move toward the plane of the forging, the follow-up turntable is installed on the first push plate, the second push-pull cylinder drives the second push plate to move toward the curved surface of the forging, the profiling clamp block is installed on the second push plate through a bearing, and the rotating motor on the second push plate drives the profiling clamp block to rotate.

[0009] Preferably, the gasket feeding mechanism includes a rotary unloading manipulator for picking up and placing stamping parts, a gasket direct vibration feeder for providing gaskets, and a gasket pressing device for installing gaskets, the gasket pressing device includes a pressing frame, a pen-shaped cylinder, a first push plate, a first pressing cylinder, a second push plate, a fixed block, a clamping claw, a second pressing cylinder and a pressing head, the pressing frame is equipped with a pen-shaped cylinder, the pen-shaped cylinder drives the first push plate to move horizontally, and the first push plate is equipped with a first pressing cylinder. Cylinder, the first press-fitting cylinder drives the second push plate to move in the vertical direction, a fixed block is installed on the second push plate, two clamping jaws are installed in the fixed block, the outer ends of the clamping jaws are against the fixed block through a reset spring, the clamping jaws extend downward and a gasket placement groove is provided at the lower part, and a second press-fitting cylinder is also installed on the second push plate, a press-fitting head is installed on the piston rod of the second press-fitting cylinder, the lower part of the press-fitting head is located between the two clamping jaws, the lower part of the press-fitting head is in a cone shape, and the downward movement of the press-fitting head can drive the two clamping jaws to move in opposite directions.

[0010] Preferably, the angle correction mechanism includes a correction bracket, a lifting cylinder, a correction lower pressure plate, a rotating motor and a rotating dial head. The correction bracket is equipped with a lifting cylinder, which drives the correction lower pressure plate to move up and down. The correction lower pressure plate is equipped with a rotating motor, which drives the rotating dial head to rotate.

[0011] Preferably, the punching device includes a punching frame, a tooling base plate, a stamping part clamp, a spinning cylinder, a puncher and a waste collection box. The tooling base plate is placed docked on the workbench of the punching frame, and the tooling base plate is equipped with a stamping part clamp for clamping the stamping part. Two spinning cylinders for pressing the forging are also installed on the tooling base plate. A puncher for punching holes is installed in the punching frame, and a waste collection box is docked below the workbench of the punching frame.

[0012] Preferably, the locating pin installation device includes a locating pin rack, a floating tool installed on the locating pin rack for clamping and fixing the product, a locating pin feeding device for providing locating pins, a locating pin pressing device for pressing the locating pins onto the product, and a supporting device for fixing the product.

[0013] Preferably, the product assembly function testing device includes a detection frame, a transfer tool, a light curtain, a stamping part angle testing device, a pneumatic marking machine, a press-fitting structure, a position change robot and a discharge structure. The detection frame is installed with a transfer tool, and a product placement groove is provided on the transfer plate of the transfer tool, and a positioning hole cooperating with the positioning pin is provided in the product placement groove. Light curtains are installed in the protective covers on the front and rear sides of the transfer tool, and a stamping part angle testing device and a pneumatic marking machine are sequentially arranged on one side along the transfer direction of the transfer tool, and a press-fitting structure is installed on the other side of the transfer tool. A position change robot is docked at the conveying end of the transfer tool, and a discharge structure is docked at the lower end of the position change robot; the stamping part angle testing device includes a servo motor rotating assembly, a detection head and a torque sensor, the servo motor rotating assembly drives the detection head to rotate, and the detection head is used to move the stamping part installed on the forging, and a torque sensor is also installed between the servo motor rotating assembly and the detection head.

[0014] An automobile door hinge assembly production process, characterized in that it includes the following steps:

[0015] S1. Install rivets and bushings, insert the rivets into the installation sleeves of the tooling, position the rivets, insert the bushings into the jacking columns of the tooling, and position the bushings;

[0016] S2, install forgings and stampings, manually hold the forgings, put the forgings on the rivets, clamp the forgings in the clamping structure, manually hold the stampings, put the stampings on the bushings, and support the stampings with the profiling mounting plate;

[0017] S3, primary bushing flanging, the bushing flanging mechanism moves downward, and the upper and lower parts of the bushing passing through the stamping part are horizontally bent toward the surrounding areas to complete the flanging;

[0018] S4, one-time riveting, the first riveting mechanism moves downward to rivet the forging and the upper part of the rivet together;

[0019] S5. The forging is flipped, and the side extension structure and the lifting structure extend to open the clamping structure on the tooling, release the forging, the material taking manipulator grabs the forging and rivets that are rotationally riveted together at the upper part, the rotating device extends to drive the forging and the rivets to rotate, and then the material taking manipulator places them on the tooling for clamping and positioning;

[0020] S6. Gasket installation: The rotating material placing manipulator grabs the stamped part with a bushing after being processed in step S3 and sleeves it on the rivet after being flipped in step S5. The gasket pressing device vibrates and feeds the gaskets straight, grabs the gaskets and sleeves them on the protruding rivets. At this time, there is a gap between the flanged bushing below the stamped part and the forging. The clamping jaws of the gasket pressing device first place the gasket, and the pressing head continues to move downwards, driving the two clamping jaws to move away from each other. The two clamping jaws press the stamped part and apply pressure to remove the gap;

[0021] S7. Secondary rotational riveting: The second rotational riveting mechanism rotates and rivets the other unriveted end of the rivet. At this time, the forging and the stamped part are installed together, and the stamped part can rotate relative to the forging through the bushing;

[0022] S8. Angle correction: The rotating motor of the angle correction mechanism drives the rotating dial head to rotate. The moving rotating dial head drives the stamped part to rotate, first reversely and then forward by a small angle to ensure that the vertical plane angles of the stamped part and the forging are the same and meet the predetermined angle;

[0023] S9. Drilling the bottom surface of the forging: The blanking and conveying mechanism discharges the materials. At this time, the operator takes the assembled product to the drilling device for positioning and clamping, and the drilling machine drills the bottom surface of the forging;

[0024] S10. Installing the positioning pins: The operator takes the product after drilling to the floating tooling for positioning and clamping. The positioning pin feeding device blows the positioning pins below the installation holes of the forging. The supporting device presses down to fix the bottom of the forging, and the positioning pin pressing device ejects to press the positioning pins into the installation holes on the bottom surface of the forging;

[0025] S11. Functional testing of the product assembly: The operator takes out the product and places it on the transfer tooling. The positioning pins at the bottom of the product are inserted into the positioning holes for positioning. The light curtain detects the product. The transfer tooling drives the product to the next station. The pressing structure presses the casting from the rear side and above. The stamped part angle testing device works. The servo motor rotating assembly rotates to drive the detection head to toggle the stamped part to rotate forward and backward by 20 degrees. The torque sensor identifies the torque magnitude during the toggling process. If the torque is too large, the stamped part rotates smoothly and is restricted, and it is a defective product. The transfer tooling drives the product to the next station. The pneumatic marking machine marks the qualified products detected, and the transposition manipulator takes the marked products to the discharging structure for output.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The tooling can position and fix each part of the automotive door hinge and prepare for the subsequent processes;

[0028] The rivet feeding mechanism and the bushing feeding mechanism share the three-axis material taking manipulator for feeding, which saves costs. The direct vibration feeding and discharging ports all adopt the cutting structure to avoid material piling.

[0029] The lifting column and the contoured mounting plate on the tooling are elastically set by the elastic column and used in conjunction with the bushing flanging mechanism. The bushing flanging mechanism can automatically flanging the upper and lower edges of the bushing on the stamping part. The stamping part can rotate relative to the bushing, and the elastic setting avoids damage to the product.

[0030] The angle correction mechanism can adjust the relative angles of stampings and forgings to ensure the consistency of assembled products;

[0031] The punching device and the positioning pin installation device cooperate to automatically punch holes and install positioning pins;

[0032] The product assembly function test device can detect the function of assembled products. The servo motor rotating component drives the detection head to rotate the stamping part 20 degrees forward and backward. The torque sensor identifies the torque size during the toggling process. If the torque is too large, the rotation of the stamping part is restricted and it is a defective product. To ensure the accuracy of the detection, qualified products can be automatically marked and materials can be automatically unloaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A top view of an automatic assembly line for automobile door hinges.

[0034] Figure 2 The figure is a schematic diagram of the tooling structure of an automatic assembly production line for automobile door hinges.

[0035] Figure 3 The figure is a schematic diagram of the structure of the rivet and bushing feeding mechanism of an automatic assembly production line for automobile door hinges.

[0036] Figure 4 The figure is a cross-sectional view of a bushing flanging mechanism of an automatic assembly production line for automobile door hinges.

[0037] Figure 5 The figure is a schematic diagram of the bushing flanging of an automatic assembly production line for automobile door hinges.

[0038] Figure 6 The figure is a schematic diagram of the forging turning mechanism structure of an automatic assembly production line for automobile door hinges.

[0039] Figure 7 The figure is a schematic diagram of the structure of a gasket feeding mechanism for an automatic assembly production line of automobile door hinges.

[0040] Figure 8 The present invention is a schematic diagram of the structure of a gasket pressing device for an automatic assembly production line of automobile door hinges.

[0041] Figure 9 Schematic diagram of the angle correction mechanism structure of an automatic assembly production line for automotive door hinges.

[0042] Figure 10 Schematic diagram of the punching device structure of an automatic assembly production line for automotive door hinges.

[0043] Figure 11 Schematic diagram of the positioning pin installation device structure of an automatic assembly production line for automotive door hinges.

[0044] Figure 12 Schematic diagram of the product assembly function testing device structure of an automatic assembly production line for automotive door hinges.

[0045] Figure 13 Schematic diagram of the stamping part angle testing device structure of an automatic assembly production line for automotive door hinges.

[0046] Figure 14 Schematic diagram of the state during the assembly process of automotive door hinges.

[0047] Figure 15 Schematic diagram of the structure of an automotive door hinge.

[0048] Figure 16 Schematic diagram of the structure of an automotive door hinge from another perspective. Detailed implementation manners

[0049] The following combines the accompanying drawings to elaborate on the preferred embodiments of the present invention in detail, so that the advantages and features of the invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0050] Please refer to Figures 1 to 16 , the embodiments of the present invention include:

[0051] An automatic assembly production line for automotive door hinges and its process. This automatic assembly production line for automotive door hinges includes a frame 1. An assembly device 2, a punching device 3, a positioning pin installation device 4, and a product assembly function testing device 5 are sequentially arranged on the frame 1 from left to right. The assembly device 2 includes a circular circulating conveyor 21, a number of toolings 22 driven by the circular circulating conveyor 21 to move between each work station, a rivet feeding mechanism 23, a bushing feeding mechanism 24, a manual station 25, a bushing flanging mechanism 26, a first spin riveting mechanism 27, a forging part flipping mechanism 28, a gasket feeding mechanism 29, a second spin riveting mechanism 210, an angle correction mechanism 211, and a blanking conveyor 212 that are sequentially arranged around the circular circulating conveyor 21.

[0052] The tooling 22 includes a bottom plate 221, a mounting sleeve 222 mounted on the bottom plate 221 for positioning rivets, a clamping structure 223 for positioning forgings, a lifting column 224 for positioning bushings, and a profiling mounting plate 225 for positioning stamped parts. The lifting column 224 and the profiling mounting plate 225 are elastically arranged through elastic columns.

[0053] Both the rivet feeding mechanism 23 and the bushing feeding mechanism 24 adopt vibrating bowl direct vibration feeding. The direct vibration feeding discharge ports both adopt a cutting structure 234-1 to avoid material accumulation. The rivet feeding mechanism 23 and the bushing feeding mechanism 24 share a three-axis picking manipulator 234-2 for feeding.

[0054] The bushing flanging mechanism 26 includes a flanging bracket 261, a flanging cylinder 262 mounted on the flanging bracket 261, a lifting plate 263 driven by the flanging cylinder 262 to move downward, a pressure sleeve 264 mounted below the lifting plate 263, and a pressure head 265 elastically connected to the inside of the pressure sleeve 264 through a spring. The lower part of the pressure head 265 is successively provided with a socket part 2651 and a flanging part 2652 that can be inserted into the bushing from bottom to top with an increasing shaft diameter. When the bushing is flanged, the flanging cylinder 262 drives the pressure sleeve 264 on the lifting plate 263 to move downward to press the stamped part. Continuing to move downward, the lower part of the pressure head 265 is inserted into the socket part 2651 of the bushing, and the lower cross-section of the flanging part 2652 flanges the upper part of the bushing, as Figure 5 shown.

[0055] The first riveting mechanism 27 and the second riveting mechanism 210 adopt automatic riveting machines.

[0056] The forging flipping mechanism 28 includes a side extending structure 281, a lifting structure 282, a material taking manipulator 283, and a rotating device 284. The side extending structure 281 and the lifting structure 282 extend to open the clamping structure 223 on the tooling 22 and release the forging. The material taking manipulator 283 includes a jaw cylinder 2831 for gripping the forging and a Z-axis driving module 2832 for driving the jaw cylinder 2831 to move upward. The Z-axis driving module 2832 is installed on the X-axis driving module 2833, and the X-axis driving module 2833 is fixed to the frame 1 through a bracket. The rotating device 284 includes a first push-pull cylinder 2841, a first push plate 2842, a follower turntable 2843, a second push-pull cylinder 2844, a second push plate 2845, a profiling clamping block 2846, and a rotating motor 2847. The first push-pull cylinder 2841 drives the first push plate 2842 to move towards the plane direction of the forging. The follower turntable 2843 is installed on the first push plate 2842. The second push-pull cylinder 2844 drives the second push plate 2845 to move towards the curved surface direction of the forging. The profiling clamping block 2846 is installed on the second push plate 2845 through a bearing. The rotating motor 2847 on the second push plate 2845 drives the profiling clamping block 2846 to rotate. The tooling 22 is moved to the station of the forging flipping mechanism 28. The material taking manipulator 283 extends to clamp the forging. The side extending structure 281 and the lifting structure 282 extend to open the clamping structure 223 on the tooling 22, and the clamping structure 223 releases the forging. The material taking manipulator 283 moves the forging upward to the middle of the rotating device 284. The first push-pull cylinder 2841 drives the follower turntable 2843 to closely adhere to the side plane of the forging. The second push-pull cylinder 2844 drives the profiling clamping block 2846 to extend and clamp the side curved surface of the forging. The material taking manipulator 283 releases. The rotating motor 2847 drives the forging to rotate 180 degrees. The material taking manipulator 283 places the rotated forging back on the tooling 22 again.

[0057] The gasket feeding mechanism 29 includes a rotary material placing manipulator 291 for picking and placing stamping parts, a gasket linear vibratory feeder 292 for providing gaskets, and a gasket pressing device 293 for installing gaskets. The gasket pressing device 293 includes a pressing machine frame 2931, a pen-shaped cylinder 2932, a first push plate 2933, a first pressing cylinder 2934, a second push plate 2935, a fixed block 2936, clamping jaws 2937, a second pressing cylinder 2938, and a pressing head 2939. A pen-shaped cylinder 2932 is installed on the pressing machine frame 2931. The pen-shaped cylinder 2932 drives the first push plate 2933 to move horizontally. A first pressing cylinder 2934 is installed on the first push plate 2933. The first pressing cylinder 2934 drives the second push plate 2935 to move in the vertical direction. A fixed block 2936 is installed on the second push plate 2935. Two clamping jaws 2937 are installed in the fixed block 2936. The outer ends of the clamping jaws 2937 are abutted against the fixed block 2936 through return springs. The clamping jaws 2937 extend downward and a gasket placement groove is provided at the lower part. A second pressing cylinder 2938 is also installed on the second push plate 2935. A pressing head 2939 is installed on the piston rod of the second pressing cylinder 2938. The lower part of the pressing head 2939 is located between the two clamping jaws 2937. The lower part of the pressing head 2939 is conical. When the pressing head 2939 moves downward, it can drive the two clamping jaws 2937 to move away from each other.

[0058] The angle correction mechanism 211 includes a correction support 2111, a lifting cylinder 2112, a correction lower pressing plate 2113, a rotary motor 2114, and a rotary dial 2115. A lifting cylinder 2112 is installed on the correction support 2111. The lifting cylinder 2112 drives the correction lower pressing plate 2113 to move in the up and down direction. A rotary motor 2114 is installed on the correction lower pressing plate 2113. The rotary motor 2114 drives the rotary dial 2115 to rotate.

[0059] The punching device 3 includes a punching machine frame 31, a tooling bottom plate 32, a stamping part clamping jaw 33, a spinning cylinder 34, a punching machine 35, and a waste collection box 36. The tooling bottom plate 32 is placed butt-jointed on the workbench of the punching machine frame 31. A stamping part clamping jaw 33 for clamping stamping parts is installed on the tooling bottom plate 32. Two spinning cylinders 34 for pressing forgings are also installed on the tooling bottom plate 32. A punching machine 35 for punching is installed inside the punching machine frame 31. A waste collection box 36 is arranged butt-jointed below the workbench of the punching machine frame 31.

[0060] The positioning pin installation device 4 includes a positioning pin frame 41, a floating tooling 42 installed on the positioning pin frame 41 for clamping and fixing products, a positioning pin feeding device 43 for providing positioning pins, a positioning pin pressing device 44 for pressing the positioning pins onto the products, and a support device 45 for fixing the products.

[0061] The product assembly function testing device 5 includes a detection frame 51, a transfer tooling 52, a light curtain 53, a stamping part angle testing device 54, a pneumatic marking machine 55, a press-fitting structure 56, a transposition manipulator 57 and a discharging structure 58. A transfer tooling 52 is installed on the detection frame 51. A product placement groove is provided on the transfer plate of the transfer tooling 52, and positioning holes that cooperate with positioning pins 06 are provided in the product placement groove for positioning the product. Light curtains 53 are installed in the shields on both the front and rear sides of the transfer tooling 52. A stamping part angle testing device 54 and a pneumatic marking machine 55 are sequentially arranged along one side of the transfer direction of the transfer tooling 52. A press-fitting structure 56 is installed on the other side of the transfer tooling 52. The transfer end of the transfer tooling 52 is docked with a transposition manipulator 57, and a discharging structure 58 is docked at the lower end of the transposition manipulator 57. The stamping part angle testing device 54 includes a servo motor rotation assembly 541, a detection head 542 and a torque sensor 543. The servo motor rotation assembly 541 is installed on the workbench of the detection frame 51 through a bracket. The servo motor rotation assembly 541 drives the detection head 542 to rotate. The detection head 542 is used to toggle the stamping part installed on the forging. A torque sensor 543 is also installed between the servo motor rotation assembly 541 and the detection head 542. During operation, the servo motor rotation assembly 541 rotates to drive the detection head 542 to toggle the stamping part to rotate forward and backward by 20 degrees. The torque sensor 543 identifies the torque magnitude during the toggling process. If the torque is too large, the rotation of the stamping part is restricted, and it is a defective product.

[0062] An assembly production process for an automotive door hinge, characterized by comprising the following steps:

[0063] S1. Install rivets and bushings. Insert the rivet 01 into the installation sleeve 222 of the tooling 22 to position the rivet, and insert the bushing 02 onto the lifting column 224 of the tooling 22 to position the bushing.

[0064] S2. Install forgings and stamping parts. Manually hold the forging 03 and put the forging 03 on the rivet 01. The clamping structure 223 clamps and positions the forging. Manually hold the stamping part 04 and put the stamping part 04 on the bushing 02. The profiling mounting plate 225 supports the stamping part 04 by profiling.

[0065] S3. First bushing flanging. The bushing flanging mechanism 26 works and moves downward to horizontally bend the areas where the upper and lower parts of the bushing 02 pass through the stamping part 04 around to complete the flanging, as Figure 5 shown;

[0066] S4. First spin riveting. The first spin riveting mechanism 27 works and moves downward to spin rivet the upper parts of the forging 03 and the rivet 01 together;

[0067] S5. The forging is flipped, and the side extension structure 281 and the lifting structure 282 extend to open the clamping structure 223 on the tooling 22, loosen the forging 03, and the material taking manipulator 283 grabs the forging 03 and the rivet 01 that are rotationally riveted together at the upper part. The rotating device 284 extends to drive the forging 03 and the rivet 01 to rotate 180°, and then the material taking manipulator 283 places them on the tooling 22 for clamping and positioning;

[0068] S6. Gasket installation: The rotating material placing manipulator 291 grabs the stamped part 04 with a bushing processed in step S3 and slews it over the rivet 01 after being flipped in step S5. The gasket pressing device 293 grabs the gasket vibrated and fed by the straight vibratory feeder 292 and slews it over the extended rivet 01. At this time, there is a gap between the flanged bushing 02 below the stamped part 04 and the forging 03. The jaws 2937 of the gasket pressing device 293 first place the gasket 05, and the pressing head 2939 continues to move downwards, driving the two jaws 2937 to move away from each other. The two jaws 2937 press the stamped part 04 and apply pressure to remove the gap;

[0069] S7. Secondary rotational riveting: The second rotational riveting mechanism 210 performs rotational riveting on the other unriveted end of the rivet 01. At this time, the forging 03 and the stamped part 04 are installed together, and the stamped part 04 can rotate relative to the forging 03 through the bushing 02;

[0070] S8. Angle correction: The rotation motor 2114 of the angle correction mechanism 211 drives the rotating dial 2115 to rotate. The moving rotating dial 2115 drives the stamped part 04 to rotate, first reversely and then forward by a small angle to ensure that the vertical plane angles between the stamped part 04 and the forging 03 are the same and meet the predetermined angle;

[0071] S9. Drilling the bottom surface of the forging: The blanking and conveying mechanism 212 performs blanking. At this time, the operator takes the assembled product to the drilling device 3 for positioning and clamping, and the drilling machine 35 drills the bottom surface of the forging 03;

[0072] S10. Installing the positioning pin: The operator takes the drilled product to the floating tooling 42 for positioning and clamping. The positioning pin feeding device 43 blows the positioning pin 06 below the installation hole of the forging 03. The supporting device 45 presses down to fix the bottom of the forging, and the positioning pin pressing device 44 ejects to press the positioning pin into the installation hole at the bottom surface of the forging;

[0073] S11, product assembly function test, manually take out the product and place it on the transfer fixture 52, insert the positioning pin at the bottom of the product into the positioning hole for positioning, the light curtain 53 detects the product, the transfer fixture 52 drives the product to the next station, the press-fitting structure 56 presses the casting from the back and top, the stamping angle testing device 54 works, the servo motor rotating component 541 drives the detection head 542 to move the stamping part forward and reverse rotation 20 degrees, the torque sensor 543 identifies the torque size during the movement, if the torque is too large, the stamping part 04 will not rotate smoothly and is restricted, and it is a defective product, the transfer fixture 52 drives the product to the next station, the pneumatic marking machine 55 marks the qualified products, and the transposition robot 57 takes the marked products to the discharge structure 58 for output.

[0074] The invention discloses an automatic assembly production line for automobile door hinges and a process thereof, which have a compact structure and a reasonable layout, can automatically assemble automobile door hinges to ensure product assembly consistency, can automatically punch holes to install locating pins, can perform functional tests on finished products, and ensure product quality.

[0075] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automatic assembly production line for automobile door hinges, characterized in that: It includes a frame, on which an assembly device, a punching device, a dowel pin installation device, and a product assembly function testing device are sequentially arranged from left to right. The assembly device includes an annular circulating conveyor line, several toolings driven by the annular circulating conveyor line to move between workstations, a rivet feeding mechanism, a bushing feeding mechanism, a manual workstation, a bushing flanging mechanism, a first riveting mechanism, a forging turning mechanism, a gasket feeding mechanism, a second riveting mechanism, an angle correction mechanism, and a blanking conveyor mechanism arranged successively around the annular circulating conveyor line; The angle correction mechanism includes a correction bracket, a lifting cylinder, a correction lower pressing plate, a rotating motor, and a rotating dial head. The lifting cylinder is installed on the correction bracket, and the lifting cylinder drives the correction lower pressing plate to move in the up and down direction. The rotating motor is installed on the correction lower pressing plate, and the rotating motor drives the rotating dial head to rotate; The punching device includes a punching frame, a tooling bottom plate, a stamping part clamp, a spinning cylinder, a punching machine, and a waste collection box. The tooling bottom plate is placed butt-joint on the workbench of the punching frame. The stamping part clamp for clamping the stamping part is installed on the tooling bottom plate. Two spinning cylinders for pressing the forging are also installed on the tooling bottom plate. The punching machine for punching is installed inside the punching frame. The waste collection box is arranged butt-joint under the workbench of the punching frame; The product assembly function testing device includes a detection frame, a transfer tooling, a light curtain, a stamping part angle testing device, a pneumatic marking machine, a pressing structure, a transposition manipulator, and a discharging structure. The transfer tooling is installed on the detection frame. A product placement groove is arranged on the transfer plate of the transfer tooling. A positioning hole for cooperating with the dowel pin is arranged in the product placement groove. The light curtains are installed in the shields on the front and rear sides of the transfer tooling. The stamping part angle testing device and the pneumatic marking machine are sequentially arranged on one side along the transfer direction of the transfer tooling. The pressing structure is installed on the other side of the transfer tooling. The transposition manipulator is butt-jointed at the end of the transfer of the transfer tooling. The discharging structure is butt-jointed at the lower end of the transposition manipulator. The stamping part angle testing device includes a servo motor rotating assembly, a detection head, and a torque sensor. The servo motor rotating assembly drives the detection head to rotate. The detection head is used to dial the stamping part installed on the forging. The torque sensor is also installed between the servo motor rotating assembly and the detection head.

2. The automatic assembly production line for an automobile door hinge according to claim 1, wherein: The tooling includes a bottom plate, a mounting sleeve installed on the bottom plate for positioning the rivet, a clamping structure for positioning the forging, a lifting column for positioning the bushing, and a profiling mounting plate for positioning the stamping part. The lifting column and the profiling mounting plate are elastically arranged through an elastic column.

3. The automatic assembly production line for an automobile door hinge according to claim 1, wherein: The bushing flanging mechanism includes a flanging bracket, a flanging cylinder installed on the flanging bracket, a lifting plate driven by the flanging cylinder to move downward, a pressing sleeve installed under the lifting plate, and a pressing head elastically connected to the pressing sleeve through a spring. The lower part of the pressing head is successively provided with a socket part and a flanging part that can be inserted into the bushing from bottom to top with an increasing shaft diameter.

4. An automatic assembly production line for an automobile door hinge according to claim 1, characterized in that: The forging flipping mechanism includes a side extension structure, a lifting structure, a material picking robot and a rotating device. The side extension structure and the lifting structure are extended to open the clamping structure on the tooling. The material picking robot includes a clamping cylinder for grabbing the forging and a Z-axis driving module for driving the clamping cylinder to move upward. The Z-axis driving module is installed on the X-axis driving module, and the X-axis driving module is fixed to the frame through a bracket. The rotating device includes a first push-pull cylinder, a first push plate, a follow-up turntable, a second push-pull cylinder, a second push plate, a profiling clamp and a rotating motor. The first push-pull cylinder drives the first push plate to move toward the plane of the forging, and the follow-up turntable is installed on the first push plate. The second push-pull cylinder drives the second push plate to move toward the curved surface of the forging. The profiling clamp is installed on the second push plate through a bearing, and the rotating motor on the second push plate drives the profiling clamp to rotate.

5. An automatic assembly production line for an automotive door hinge according to claim 1, characterized in that: The gasket feeding mechanism includes a rotary unloading manipulator for picking up and placing stamping parts, a gasket direct vibration feeder for providing gaskets, and a gasket pressing device for installing gaskets. The gasket pressing device includes a pressing frame, a pen-shaped cylinder, a first push plate, a first pressing cylinder, a second push plate, a fixed block, a clamping claw, a second pressing cylinder and a pressing head. The pressing frame is equipped with a pen-shaped cylinder, which drives the first push plate to move horizontally. The first push plate is equipped with a first pressing cylinder. The first pressing cylinder drives the second push plate to move in the vertical direction, and a fixed block is installed on the second push plate. Two clamping jaws are installed in the fixed block. The outer ends of the clamping jaws are against the fixed block through a reset spring, and the clamping jaws extend downward and a gasket placement groove is provided at the lower part. A second pressing cylinder is also installed on the second push plate, and a pressing head is installed on the piston rod of the second pressing cylinder. The lower part of the pressing head is located between the two clamping jaws, and the lower part of the pressing head is in a cone shape. The downward movement of the pressing head can drive the two clamping jaws to move in opposite directions.

6. The automatic assembly production line for an automobile door hinge according to claim 1, wherein: The positioning pin installation device includes a positioning pin rack, a floating tool installed on the positioning pin rack for clamping and fixing products, a positioning pin feeding device for providing positioning pins, a positioning pin pressing device for pressing the positioning pins onto the products, and a supporting device for fixing the products.

7. A production process of an automatic assembly line for an automobile door hinge according to any one of claims 1-6, characterized in that: The following steps are involved: S1. Install rivets and bushings, insert the rivets into the installation sleeves of the tooling, position the rivets, insert the bushings into the jacking columns of the tooling, and position the bushings; S2, install forgings and stampings, manually hold the forgings, put the forgings on the rivets, clamp the forgings in the clamping structure, manually hold the stampings, put the stampings on the bushings, and support the stampings with the profiling mounting plate; S3, primary bushing flanging, the bushing flanging mechanism moves downward, and the upper and lower parts of the bushing passing through the stamping part are horizontally bent toward the surrounding areas to complete the flanging; S4, one-time riveting, the first riveting mechanism moves downward to rivet the forging and the upper part of the rivet together; S5, the forging is turned over, the side extension structure and the jacking structure are extended to open the clamping structure on the tooling, the forging is loosened, the material taking manipulator grabs the forging and rivets riveted together on the upper part, the rotating device is extended to drive the forging and rivets to rotate, and then the material taking manipulator places them on the tooling for clamping and positioning; S6. Gasket installation: The rotating discharging robot grabs the stamped part with a bushing after the processing in step S3 and slews it onto the rivet after flipping in step S5. The gasket pressing device vibrates and feeds the gaskets straight, grabs the gaskets and slews them onto the protruding rivets. At this time, there is a gap between the flanged bushing under the stamped part and the forging. The jaws of the gasket pressing device first release the gaskets, and the pressing head continues to move downwards, driving the two jaws to move away from each other. The two jaws press the stamped part and apply pressure to remove the gap. S7. Secondary riveting: The second riveting mechanism rivets the other unriveted end of the rivet. At this time, the forging and the stamped part are assembled together, and the stamped part can rotate relative to the forging through the bushing. S8. Angle correction: The rotation motor of the angle correction mechanism drives the rotating dial to rotate. The rotating dial drives the stamped part to rotate, first in reverse and then forward by a small angle to ensure that the vertical plane angles between the stamped part and the forging are the same and meet the predetermined angle. S9. Drilling the bottom surface of the forging: The blanking and conveying mechanism discharges the materials. At this time, the operator takes the assembled product to the drilling device for positioning and clamping, and the drilling machine drills the bottom surface of the forging. S10. Installing the positioning pins: The operator takes the drilled product to the floating tooling for positioning and clamping. The positioning pin feeding device blows the positioning pins to the lower part of the installation holes of the forging. The supporting device presses down to fix the bottom of the forging, and the positioning pin pressing device ejects to press the positioning pins into the installation holes on the bottom surface of the forging. S11. Functional testing of the product assembly: The operator takes out the product and places it on the transfer tooling, inserts the bottom positioning pins of the product into the positioning holes for positioning. The light curtain detects the product, and the transfer tooling drives the product to the next station. The pressing structure presses the casting from the rear and above. The stamped part angle testing device works. The servo motor rotation assembly rotates to drive the detection head to toggle the stamped part to rotate forward and backward by 20 degrees. The torque sensor identifies the torque magnitude during the toggling process. If the torque is too large, the stamped part rotates smoothly and is restricted, and it is a defective product. The transfer tooling drives the product to the next station. The pneumatic marking machine marks the qualified products after testing. The transposition robot takes the marked products to the discharging structure for output.

Images