Auxiliary frame assembly production line

Abstract

The auxiliary frame assembling production line comprises a first side line, a second side line, a third side line and a fourth side line which are connected in sequence and define a square frame, and conveying belt conveying units are arranged on the side lines. Rotary tables capable of adjusting the orientation of the auxiliary frame are arranged at the intersection positions of the side lines. A discharging station and a feeding station are arranged on the first side line, a vibration absorber preassembling station is arranged on the second side line, a transverse bolt tightening station and a swing arm bolt tightening station are arranged on the third side line, and a hinge bolt tightening station and a paint scratching station are arranged on the fourth side line. And a transverse straight conveying line for conveying the vibration absorbers and a first robot unit are arranged corresponding to the vibration absorber preassembling station. And a second robot unit and a third robot unit are correspondingly arranged corresponding to the transverse bolt tightening station and the swing arm bolt tightening station respectively. And a fourth robot unit and a fifth robot unit are correspondingly arranged corresponding to the hinge bolt tightening station and the paint scratching station respectively. The assembly efficiency can be improved, the labor intensity of workers is reduced, the assembly quality is improved, and the error rate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile subframe assembly, and particularly relates to a subframe assembly production line. Background Art

[0002] As Figure 1 、 Figure 2 shown in the automobile subframe (or called automobile subframe plate), which includes a subframe main body 100, a pair of swing arms 200, a pair of hinges 300 and a shock absorber 400. The two swing arms 200 are arranged on the left and right sides of the subframe main body 100. The two hinges 300 respectively correspond to and are installed on the free end sides of the two swing arms 200. The shock absorber 400 is fixed at the middle position of the rear side of the subframe main body 100 and is fixed on the subframe main body 100 with two first bolts 100. On the front side of the subframe main body 100, the two swing arms 200 are respectively fixed on the subframe main body 100 with two second bolts 200. At the same time, on the front side of the subframe main body 100, there is also a third bolt 30 connecting the swing arm 200 and the subframe main body 100. The swing arms 200 and the hinges 300 are respectively fixedly connected by three fourth bolts 40. The axes of the first bolts 10 and the second bolts 20 extend in the horizontal plane and can be called transverse bolts; the axis of the third bolt 30 extends in the vertical direction and can be called a vertical bolt or a swing arm bolt; the axis extension direction of the fourth bolt 40 has a certain deviation relative to the vertical direction and can be called a hinge bolt.

[0003] In the assembly operation of the subframe, it is necessary to manually install the shock absorber 400, the swing arms 200 and the hinges 300 one by one, and fix each component on the subframe main body 100 with bolts in sequence. The entire operation process requires adjusting the orientation of the subframe main body 100 multiple times and switching positions, resulting in problems such as low assembly operation efficiency, high labor intensity of workers, and easy existence of bolts that are not tightened, and relatively high assembly error rate. Summary of the Invention

[0004] To overcome the above technical problems, the present invention provides a subframe assembly production line, which can not only improve the assembly efficiency of the subframe, reduce the labor intensity of workers, but also improve the assembly quality and reduce the error rate of bolts that are not tightened.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a subframe assembly production line, including a first side line, a second side line, a third side line and a fourth side line that are sequentially connected and can form a square. At least one independent conveyor belt conveying unit is arranged on each side line. The square formed by the four side lines can be in the shape of a square or a rectangle.

[0006] In the clockwise direction, a discharging station and a feeding station are successively arranged on side line 1, a shock absorber pre-assembly station is arranged on side line 2, a transverse bolt tightening station and a swing arm bolt tightening station are successively arranged on side line 3, and a hinge bolt tightening station and a painting marking station are successively arranged on side line 4.

[0007] Corresponding to the shock absorber pre-assembly station, a horizontal and vertical conveyor line for conveying shock absorbers is arranged outside side line 2, and a first robot unit is arranged inside side line 2. The first robot unit can grab the shock absorber from the horizontal and vertical conveyor line, send it to the rear side of the subframe body, and pre-fix the shock absorber on the subframe body with the first bolt.

[0008] Corresponding to the transverse bolt tightening station and the swing arm bolt tightening station, a second robot unit and a third robot unit are correspondingly arranged inside side line 3. The second robot unit and the third robot unit can respectively complete the tightening operations of the transverse bolts and the swing arm bolts, and spray paint on the bolts at the same time.

[0009] Corresponding to the hinge bolt tightening station and the painting marking station, a fourth robot unit and a fifth robot unit are correspondingly arranged inside side line 4. The fourth robot unit can complete the tightening operation of the hinge bolts and spray paint on the bolts at the same time. The fifth robot unit can perform marking operations on the positions where paint has been sprayed on each bolt.

[0010] Rotary tables capable of rotating around a vertical axis are arranged at the intersections of the two side lines. The side line relatively located upstream of the rotary table can convey the subframe to the rotary table, and after the orientation of the subframe is adjusted on the rotary table, the side line relatively located downstream of the rotary table can convey the subframe to the next station.

[0011] Optionally, a buffer station is arranged on side line 1 and downstream of the feeding station, and a barcode scanner is arranged beside the buffer station. When the pre-assembled subframe is conveyed from the feeding station to the buffer station, the barcode scanner can automatically scan the steel code printed on the subframe body.

[0012] Optionally, a buffer station is respectively arranged on side line 2, upstream and downstream of the shock absorber pre-assembly station.

[0013] Optionally, a buffer station is arranged on side line 3, between the transverse bolt tightening station and the swing arm bolt tightening station.

[0014] Optionally, buffer stations are arranged on side line 4, upstream of the hinge bolt tightening station and between the hinge bolt tightening station and the painting marking station.

[0015] Optionally, a safety guardrail is arranged around the four side lines, and a cross-line ladder is arranged on the safety guardrail.

[0016] The beneficial effects of the present invention are as follows: The present invention can not only improve the assembly efficiency of the subframe, reduce the labor intensity of workers, but also improve the assembly quality and reduce the error rate of missed bolt tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic axonometric structure of the subframe Figure 1 .

[0018] Figure 2 is a schematic axonometric structure of the subframe Figure 2 (partial top-down view).

[0019] Figure 3 is a schematic top view structure of the present invention.

[0020] Figure 4 is a schematic application scenario diagram of the present invention.

[0021] Figure 5 is Figure 4 a schematic top view structure of the scenario.

[0022] In the figure: 100 subframe main body, 200 swing arm, 300 hinge, 400 shock absorber;

[0023] 10 first bolt, 20 second bolt, 30 third bolt, 40 fourth bolt;

[0024] 001 line one, 002 line two, 003 line three, 004 line four;

[0025] 01 turnover rack, 02 first robot unit, 03 second robot unit, 04 third robot unit, 05 fourth robot unit, 06 fifth robot unit, 07 suspension arm unit, 08 cross-line ladder, 09 safety guardrail;

[0026] 1 feeding station, 2 shock absorber pre-assembly station, 2.1 horizontal and vertical conveyor line, 2.2 first repair station, 3 horizontal bolt tightening station, 4 swing arm bolt tightening station, 5 hinge bolt tightening station, 6 painting station, 7 discharging station, 7.1 second repair station, 8 rotating table, 9 buffer station. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The structures, proportions, sizes, etc. shown in the accompanying drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0028] Such as Figures 3 to 5 The subframe assembly production line shown in the figure includes a first side line 001, a second side line 002, a third side line 003, and a fourth side line 004 that are sequentially connected and can form a square. At least one independent conveyor belt conveying unit is arranged on each of the side lines 001, 002, 003, and 004. The conveyor belt conveying unit can bidirectionally convey the subframe in the front and rear or left and right directions corresponding to the side lines 001, 002, 003, and 004.

[0029] In the clockwise direction, an unloading station 7 and a loading station 1 are sequentially arranged on the first side line 001, a shock absorber pre-assembly station 2 is arranged at the middle position of the second side line 002, a transverse bolt tightening station 3 and a swing arm bolt tightening station 4 are sequentially arranged on the third side line 003, and a hinge bolt tightening station 5 and a painting station 6 are sequentially arranged on the fourth side line 004. The loading station 1, the shock absorber pre-assembly station 2, the transverse bolt tightening station 3, the swing arm bolt tightening station 4, the hinge bolt tightening station 5, the painting station 6, and the unloading station 7 are all working stations.

[0030] Corresponding to the shock absorber pre-assembly station 2, a horizontal and straight conveyor line 2.1 for conveying the shock absorber 400 is arranged outside the second side line 002, and a first robot unit 02 is arranged inside the second side line 002. The first robot unit 02 can grab the shock absorber 400 from the horizontal and straight conveyor line 2.1, send it to the rear side of the subframe main body 100, and pre-fix the shock absorber 400 on the subframe main body 100 with the first bolt 10.

[0031] Corresponding to the transverse bolt tightening station 3 and the swing arm bolt tightening station 4, a second robot unit 03 and a third robot unit 04 are respectively provided inside the third side line 003. The second robot unit 03 and the third robot unit 04 can respectively complete the tightening operations of the transverse bolts (i.e., the first bolt 10 and the second bolt 20) and the swing arm bolts (i.e., the third bolt 30), and can spray paint on each bolt at the same time.

[0032] Corresponding to the hinge bolt tightening station 5 and the paint marking station 6, a fourth robot unit 05 and a fifth robot unit 06 are respectively provided inside the fourth side line 004. The fourth robot unit 05 can complete the tightening operation of the hinge bolts (i.e., the fourth bolt 40) and spray paint on each bolt at the same time. The fifth robot unit 06 can respectively perform paint marking operations at the positions where paint has been sprayed on each bolt.

[0033] At the feeding station 1, workers suspend the swing arm 200, the hinge 300 and the subframe body 100 which are pre-assembled together to the conveyor belt on the first side line 001 through the suspension arm unit 07. At the discharging station 7, workers use the suspension arm unit 07 to lift the subframe that has completed the tightening assembly from the conveyor belt on the first side line 001. A turnover rack 01 is placed beside the feeding station 1, and pre-assembled subframes (subframes without the shock absorber 400 assembled) are placed on the turnover rack 01. During operation, workers take a subframe from the turnover rack 01, place it on the feeding station 1, and then press the start button. The conveyor belt on the first side line 001 can convey the subframe to the buffer station 9 on the downstream side of the feeding station 1 for scanning and recording.

[0034] Rotary tables 8 are provided at the intersection positions of the two side lines 001, 002, 003, 004 (i.e., the corner positions of the square), enabling the rotary tables 8 to perform rotary motions around the vertical axis, and the orientation / direction of the subframe can be adjusted by means of the rotary tables 8. The side lines 001, 002, 003, 004 located upstream of a certain rotary table 8 can convey the subframe onto this rotary table 8, and after the orientation / direction of the subframe is adjusted by this rotary table 8, the side lines 001, 002, 003, 004 located downstream of this rotary table 8 can convey the subframe to the next station. As Figure 3 shown, on the rotary table 8, a linear notch is formed in the diameter direction passing through the axis line, and when this linear notch rotates to be in the same direction as a certain side line 001, 002, 003, 004 located downstream of it, the side line 001, 002, 003, 004 located downstream of it can take the subframe off the rotary table 8 and send it to the next station (including the operation station and the buffer station 9).

[0035] A buffer station 9 is provided on the first side line 001 and on the downstream side of the feeding station 1, and a barcode scanner is provided beside the buffer station 9. When the pre-assembled subframe (without the shock absorber 400 assembled) is conveyed from the feeding station 1 to this buffer station, the barcode scanner automatically scans the steel code printed on the subframe body 100 to complete the electronic record. At the same time, a repair station two 7.1 can be provided in the reverse extension direction of the first side line 001.

[0036] On the second side line 002, a buffer station 9 is provided respectively on the upstream and downstream sides of the shock absorber pre-installation station 2. The subframe (referred to as the No. I frame) on the rotary table 8 conveyed to its downstream side by the first side line 001, after being adjusted to face the correct direction, is first carried by the conveyor belt on the second side line 002 to the buffer station 9 on the upstream side of the shock absorber pre-installation station 2; after the shock absorber pre-installation station 2 completes the pre-installation operation of the shock absorber 400, the conveyor belt on the second side line 002 can synchronously transfer the No. I frame and the subframe that has just completed the pre-installation operation of the shock absorber 400 to the shock absorber pre-installation station 2 and the buffer station 9 on the downstream side of the shock absorber pre-installation station 2 respectively.

[0037] On the third side line 003, a buffer station 9 is provided between the transverse bolt tightening station 3 and the swing arm bolt tightening station 4. In the reverse extension direction of the third side line 003, a repair station one 2.2 is formed.

[0038] On the fourth side line 004, buffer stations 9 are provided on the upstream side of the hinge bolt tightening station 5 and between the hinge bolt tightening station 5 and the paint marking station 6.

[0039] A safety guardrail 09 is provided around the four side lines 001, 002, 003, 004, and a cross-line ladder 08 is provided on the safety guardrail 09. Staff can enter from outside the safety guardrail 09 (i.e., outside the square) into the safety guardrail 09 (i.e., inside the square) via the cross-line ladder 08.

[0040] A visual recognition system is provided on the second robot unit 03, the third robot unit 04, and the fourth robot unit 05. With the configured visual recognition system, the position of the bolt to be tightened can be accurately recognized. At the same time, a visual recognition system can also be set on the first robot unit 02 and the fifth robot unit 06, and with the configured visual recognition system, the position of the bolt to be assembled or the bolt to be painted can be accurately recognized.

[0041] In the technical solution of the present invention, after the pre-assembled subframe is placed on the feeding station 1, subsequent pre-installation of the shock absorber 400 can be automatically completed, as well as the tightening, painting of the two first bolts 10 and the two second bolts 20, the tightening and painting of the two third bolts 30, the tightening and painting of the six fourth bolts 40 and other operation steps. After the tightening operation of all bolts is completed, a paint marking is made through the paint marking station 6, which is convenient for subsequent inspection and is not easy to miss.

[0042] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. There are many aspects of the present invention that can be improved without departing from the overall idea. Those familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A subframe assembly production line, characterized in that: It includes side line 1, side line 2, side line 3 and side line 4 which are connected in sequence and can form a square frame; each side line is equipped with at least one independent conveyor belt transport unit; In clockwise direction, a discharging station and a feeding station are arranged in sequence on the first edge, a vibration absorber pre-installation station is arranged on the second edge, a transverse bolt tightening station and a swing arm bolt tightening station are arranged in sequence on the third edge, and a hinge bolt tightening station and a painting station are arranged in sequence on the fourth edge; Corresponding to the vibration absorber pre-installation station, a horizontal and vertical conveyor line for conveying the vibration absorber is provided on the outer side of the second side line, and a first robot unit is provided on the inner side of the second side line; the first robot unit can grab the vibration absorber from the horizontal and vertical conveyor line, convey it to the rear side of the sub-frame body, and pre-fix the vibration absorber on the sub-frame body with a first bolt; Corresponding to the transverse bolt tightening station and the swing arm bolt tightening station, a second robot unit and a third robot unit are provided on the inner side of the edge line three; the second robot unit and the third robot unit can respectively complete the tightening operation of the transverse bolt and the tightening operation of the swing arm bolt, and spray paint on the bolt at the same time; Corresponding to the hinge bolt tightening station and the painting station, a fourth robot unit and a fifth robot unit are provided on the inner side of the fourth edge; the fourth robot unit can complete the tightening operation of the hinge bolts and spray paint on the bolts at the same time; the fifth robot unit can perform marking operations at the positions where paint is sprayed on each bolt; A rotating table capable of rotating around a vertical axis is provided at the intersection of the two side lines; the side line located on the upstream side of the rotating table can transport the sub-frame to the rotating table, and after the rotating table adjusts the orientation of the sub-frame, the side line located on the downstream side of the rotating table can transport the sub-frame to the next workstation.

2. The subframe assembly line according to claim 1, characterized in that: A buffer station is provided on the first side line and on the downstream side of the feeding station, and a barcode scanner is provided next to the buffer station; when the preassembled sub-frame is transferred from the feeding station to the buffer station, the barcode scanner can automatically scan the steel code printed on the main body of the sub-frame.

3. The subframe assembly line according to claim 1, characterized in that: A buffer station is respectively arranged on the second side line and on the upstream and downstream sides of the vibration absorber pre-installation station.

4. The subframe assembly line according to claim 1, characterized in that: On side line three, a buffer station is provided between the transverse bolt tightening station and the swing arm bolt tightening station.

5. The subframe assembly line according to claim 1, characterized in that: On side line four, buffer stations are provided on the upstream side of the hinge bolt tightening station and between the hinge bolt tightening station and the painting station.

6. The subframe assembly line according to claim 1, characterized in that: Safety guardrails are installed on the four outer side lines, and cross-line ladders are installed on the safety guardrails.

Images