Automobile rear seat six-point backrest back panel mounting hole welding surface inspection fixture

Abstract

In order to solve the problems of low efficiency, high labor intensity, and easy misdetection or missed detection in the existing detection methods of the six-part backrest backboard mounting holes of the rear seat of the automobile, the utility model proposes a welding surface inspection fixture for the six-part backrest backboard mounting holes of the rear seat of the automobile, including a base plate, a side panel, a positioning column, a reference column, a fixing device, a detection seat and a control mechanism; the base plate is a rectangular plate; the side panel is fixed on the surface of the base plate; the positioning column is fixed on the surface of the base plate on the inner side of the side panel; the reference column is fixed at intervals on the surface of the base plate of the three rectangular sides inside the side panel; the fixing device is fixed at intervals on the surface of the base plate of the three rectangular sides outside the side panel; there are several detection seats; and the control mechanism is arranged in parallel at the corners of the base plate. The beneficial technical effect of the utility model is that the hole positions of all mounting holes can be detected at one time while ensuring that the six-part backrest backboard is flat, and the method is simple and the result is reliable.

Description

Technical Field

[0001] The utility model relates to a welding surface detection technology for mounting holes of a six-part backrest backboard of a rear-row seat of an automobile, in particular to a welding surface detection tool for mounting holes of a six-part backrest backboard of a rear-row seat of an automobile. Background Art

[0002] The six-part backrest of the rear seat of the car is a stamped sheet metal part, which is used on the backrest of the rear seat of the car. It is the main frame of the rear seat of the car. Other parts of the seat are welded or bolted to this part; its main function is to improve the strength of the rear seat, prevent the rear seat from being torn or deformed by the impact of luggage, causing injuries to the rear passengers, and at the same time, prevent the rear seat from being pierced by sharp luggage. The six-part backrest of the rear seat of the car is made of metal sheet by stamping technology. It needs to go through the stamping process of drawing, punching and trimming, flanging, pre-rolling and rolling before it can be completed. The contour shape of the stamped six-part backrest of the rear seat of the car is a rectangle, with arc-shaped flanging around it, and a number of convex steps with a flat surface are arranged at the edges of the four sides, and a number of reinforcing strip steps are arranged obliquely in the middle of the left side. There are more than 20 mounting holes of different shapes and sizes at the edges and in the middle (see the attached Figure 1 , in the figure, a is a convex step, b is a reinforced strip step, and c is a through hole of various shapes and sizes). The mounting holes of various shapes and sizes are mainly used to connect or fix the parts of the seat. Since the six-point backrest backboard is made by stamping process and is a metal sheet, it is inevitable to form curling or warping during the manufacturing process. Therefore, after the stamping is completed, it is necessary to detect whether the hole positions of more than 20 mounting holes of various shapes and sizes meet the design requirements. The prior art automobile rear seat six-point backrest backboard mounting hole detection method is to fix the processed six-point backrest backboard horizontally through the bottom lining plate (the corresponding positions of the bottom lining plate and more than 20 mounting holes of various shapes and sizes are provided with holes of shape and size matching the corresponding mounting holes), and use a plug gauge to detect the mounting holes one by one. The plug gauge is a rigid straight bar, and the cross-sectional shape and size of its detection section match the mounting hole to be detected. During the detection, the plug gauge is inserted into the corresponding mounting hole. If it can be inserted, it is considered that the hole position of the mounting hole meets the design requirements; otherwise, it is considered not to meet the design requirements. Since the six-point backrest has a large number of mounting holes in different shapes and sizes, and manual inspection of each mounting hole is not only inefficient and labor-intensive, but also prone to false detection or missed detection.

[0003] Obviously, the existing method for detecting the welding surface of the six-point backrest mounting hole of the rear seat of an automobile has the problems of low efficiency, high labor intensity, and easy to cause false detection or missed detection. Summary of the invention

[0004] In order to solve the problems of low efficiency, high labor intensity, and easy misdetection or missed detection in the existing method for detecting the welding surface of the six-part backrest backboard mounting holes of the rear seat of an automobile, the utility model proposes a welding surface inspection tool for the six-part backrest backboard mounting holes of the rear seat of an automobile.

[0005] The utility model discloses a welding surface inspection fixture for mounting holes of six-point backrest panels of rear seats of automobiles, comprising a base plate, side panels, positioning columns, reference columns, fixing devices, a detection seat and a control mechanism; the base plate is a rectangular plate; the side panels are rectangular frames fixed on the surface of the base plate, and the shape and size of the inner side of the side panel frames match the outer shape of a qualified six-point backrest panel; there are two positioning columns, comprising a base I and a positioning shaft; the base I is a rectangular column fixed on the surface of the base plate on the inner side of the side panels; the positioning shaft is arranged on the surface of the base I; there are fourteen reference columns, comprising a base II and a reference step; the base II is an L-shaped column fixed at intervals on the surface of the base plate at three rectangular sides on the inner side of the side panels; the reference step is cylindrical and fixed on the surface of the base II; there are fourteen fixing devices, comprising a base III, a flip mechanism and a clamping mechanism; the base III is a rectangular cylinder, which is fixed at intervals on the surface of the substrate of the three rectangular sides outside the side enclosure; the flip mechanism includes an articulated seat, a rocker, a locking column, a locking pin and a wrench I; the articulated seat is fixed on the surface of the base III, a hinge shaft is provided at the rear end of the articulated seat, and a locking through hole is provided at the front end; the rocker is a long strip rod, the rear end of which is hinged to the rear end of the articulated seat, and a through hole is provided at the front end; the locking column is a circular cylinder, which is inserted into the locking through hole at the front end of the articulated seat, and a spiral groove is provided on the outer circle of the locking column; the locking pin is fixed to the upper part of the spiral groove of the locking column through the through hole above the articulated seat; the wrench I is fixed to the outer end of the locking column; the clamping mechanism is fixed in the through hole at the front end of the rocker; the detection seat is a plurality of, including a base IV, a detection rod, a cover plate, a spring, Cable and fixed pulley; the base IV is a Z-shaped or T-shaped column with a rectangular cross section, and a through hole with an internal step is vertically arranged in the transverse extension section at the upper part of the base IV; the detection rod is inserted into the through hole of the base IV, and a detection head is arranged at its upper end, and the size and shape of the detection head match the installation hole to be detected; the shape of the cover plate matches the surface of the through hole of the base IV, and the inner hole matches the shape and size of the detection head; the spring is sleeved on the rod part of the detection rod, the upper end contacts the bottom of the detection head, and the lower end contacts the step of the through hole of the base IV; the cable is connected between the bottom of the detection rod and the control mechanism; there are several fixed pulleys, which are arranged between the base IV and the control mechanism The position where the cable between them needs to change direction; in addition, the structures of the detection seats are basically the same, and the only difference is that one or two detection rods are arranged on the same base IV, and the shape of the base IV; the total number of the detection rods is the same as the number of mounting holes of the six-point backrest back plate to be detected; the control mechanisms are three, which are arranged in parallel at the corners of the base plate, including a base V, a hollow screw rod I, a fastening nut I, a sliding rod I, a wrench II, a connecting rod I and a pull plate; the base V is a U-shaped structure, a plurality of through holes are arranged on the front vertical plate, and a through hole is arranged in the middle of the rear vertical plate; the rear end of the hollow screw rod I is extended with a hinged cap, and the threaded section is inserted from the outside to the inside into the through hole of the rear vertical plate of the base V;The fastening nut I is screwed onto the hollow screw rod I from the inner side of the rear vertical plate of the base V, thereby fixing the hollow screw rod I on the rear vertical plate of the base V; the sliding rod I is sleeved into the through hole of the hollow screw rod I; the front end of the wrench II is provided with a U-shaped opening with two parallel sides bent into an L shape, and the front end of the short side of the L-shaped bend is narrowed inward; and hinge holes are provided at the front and rear ends of the short side of the L-shaped bend; the rear end head of the sliding rod I is hinged to the front end of the short side of the L-shaped bend; The connecting rod I is a parallel structure, one end of which is hinged to the rear end of the short side of the L-shaped bend, and the other end is hinged to the rear end of the hollow screw I; the pull plate is a rectangular plate, on which a cable fixing hole corresponding to the through hole of the front vertical plate of the base V is provided, and is fixedly connected to the front end head of the slide rod I; wherein, the fixing position and height of the reference column are such that the convex step of the qualified six-point backrest backboard is placed upward in the side enclosure frame, and the inner surface of the convex step is tightly connected to the upper surface of the corresponding reference column reference step The fixed position and height of the positioning column are based on the condition that the inner surface of the convex step of the qualified six-point backrest is in close contact with the upper surface of the corresponding reference column reference step, and the two through holes at the diagonal position in the middle of the six-point backrest are respectively inserted on the positioning shaft; the fixed position and height of the clamping mechanism are based on the clamping surface of each clamping mechanism coinciding with and in close contact with the upper surface of the corresponding reference step after the fixing device is in the clamping state; the fixed position and height of the detection rod are based on the condition that the qualified six-point backrest is inserted on the positioning shaft, and after all the fixing devices are in the clamping state, each detection rod is aligned with the mounting hole detected by itself; the cables of all detection rods are divided into three groups after being collected and turned by the fixed pulley, and are respectively fixed in the corresponding cable fixing holes on the pull plate through the through holes of the front vertical plate of the base V, and each cable is ensured to be in a tensioned state, that is, the spring of the detection seat is in a compressed state. ;

[0006] Furthermore, the clamping mechanism includes a hollow screw II, a fastening nut II, a slide rod II, a wrench III, a connecting rod II, a screw, a cylindrical pressure head, a spring and an adjusting nut; the rear end of the hollow screw II is extended to be provided with a hinged cap, and the threaded section is inserted into the through hole of the front end of the rocker; the fastening nut II is screwed onto the hollow screw, thereby fixing the hollow screw to the front end of the rocker; the slide rod II is sleeved into the through hole of the hollow screw II; the front end of the wrench III is provided with a U-shaped opening with two parallel sides bent into an L shape , and the front end of the short side of the L-shaped bend is narrowed inward; and hinge holes are provided at the front and rear ends of the short side of the L-shaped bend; the rear end head of the sliding rod II is hinged to the front end of the short side of the L-shaped bend; the connecting rod II is a parallel structure, one end of which is hinged to the rear end of the short side of the L-shaped bend, and the other end is hinged to the rear end of the hollow screw; the screw is screwed on the lower end of the sliding rod II; the spring is sleeved between the adjusting nut of the screw and the cylindrical pressure head; the spring is sleeved on the screw; the cylindrical pressure head is installed at the lower end of the screw.

[0007] Furthermore, the size and shape of the detection head match the detected mounting hole, including that the outer contour of the detection head is 0.5-1.0 mm smaller than the inner contour of the detected mounting hole.

[0008] The beneficial technical effect of the welding surface inspection fixture for the mounting holes of the six-part backrest backboard of the rear seat of the automobile is that the hole positions of all mounting holes can be inspected at one time while ensuring that the six-part backrest backboard is flat, and the method is simple and the result is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a three-dimensional schematic diagram of the six-part backrest of the rear seat of the car;

[0010] Attached Figure 2 It is a three-dimensional schematic diagram of the welding surface inspection fixture for mounting holes of the six-point backrest backboard of the rear seat of the automobile of the utility model;

[0011] Attached Figure 3 It is a three-dimensional schematic diagram of the positioning column of the utility model;

[0012] Attached Figure 4 It is a three-dimensional schematic diagram of the reference column of the utility model;

[0013] Attached Figure 5 It is a three-dimensional schematic diagram of the fixing device of the utility model;

[0014] Attached Figure 6 It is an exploded three-dimensional schematic diagram of the flipping mechanism of the fixing device of the utility model;

[0015] Attached Figure 7 It is an exploded three-dimensional schematic diagram of the clamping mechanism of the fixing device of the utility model;

[0016] Attached Figure 8 It is a three-dimensional schematic diagram of the detection seat of the utility model;

[0017] Attached Fig. 9 It is a schematic diagram of the decomposition of the detection seat of the utility model;

[0018] Attached Fig.10 It is a three-dimensional schematic diagram of another structure of the utility model;

[0019] Attached Fig.11 This is a three-dimensional schematic diagram of another structure of the detection seat of the utility model;

[0020] Attached Fig.12 It is a three-dimensional schematic diagram of the control mechanism of the utility model;

[0021] Attached Fig.13 It is an exploded three-dimensional schematic diagram of the control mechanism of the utility model;

[0022] Attached Fig.14 It is a three-dimensional schematic diagram of the detection state of the welding surface inspection fixture of the six-part backrest backboard mounting holes of the rear seat of the automobile according to the utility model.

[0023] In the figure, 1 is a base plate; 2 is a side panel; 3 is a positioning column, 3-1 is a base Ⅰ, 3-2 is a positioning shaft; 4 is a reference column, 4-1 is a base Ⅱ, 4-2 is a reference step; 5 is a fixing device, 5-1 is a base Ⅲ, 5-2 is a flip mechanism, 5-3 is a clamping mechanism; 5-2-1 is an articulated seat, 5-2-2 is a rocker, 5-2-3 is a locking column, 5-2-4 is a locking pin, 5-2-5 is a wrench Ⅰ; 5-3-1 is a hollow screw Ⅱ, 5-3-2 is a fastening nut Ⅱ, 5-3-3 is a slide bar Ⅱ, 5-5-4 is a locking pin, 5-5-5 is a locking pin, 5-5-6 is a locking pin, 5-5-7 is a locking pin, 5-6-8 is a locking pin, 5-7-9 is a locking pin, 5-8-10 is a locking pin, 5-8-11 is a locking pin, 5-8-12 is a locking pin, 5-8-13 is a locking pin, 5-8-14 is a locking pin, 5-8-15 is a locking pin, 5-8-16 is a locking pin, 5-8-17 is a locking pin, 5-8-18 is a locking pin, 5-8-19 is a locking pin, 5-9-20 is a locking pin, 5-9-30 is a locking pin, 5-9-40 is a locking pin, 5-9-50 is a locking pin, 5-9-60 is a locking pin, 5-9-7 is a locking pin, 5-9-8 is a locking pin, 5-9-9 is a locking pin, 5-10-11 is a locking pin, 5-10-20 is a locking pin -3-4 is wrench III, 5-3-5 is connecting rod II, 5-3-6 is screw rod, 5-3-7 is cylindrical pressure head, 5-3-8 is spring, 5-3-9 is adjusting nut; 6 is detection seat, 6-1 is base IV, 6-2 is detection rod, 6-3 is cover plate, 6-4 is spring, 6-5 is cable, 6-6 is fixed pulley, 7 is control mechanism, 7-1 is base V, 7-2 is hollow screw rod I, 7-3 is fastening nut I, 7-4 is sliding rod I, 7-5 is wrench II, 7-6 is connecting rod I, 7-7 is pull plate.

[0024] The welding surface inspection fixture for mounting holes of six-part backrest backboard of rear seat of automobile of the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0025] As can be seen from the accompanying drawings, the utility model of the welding surface inspection fixture for the mounting holes of the six-point backrest backboard of the rear seat of the automobile comprises a base plate 1, a side enclosure 2, a positioning column 3, a reference column 4, a fixing device 5, a detection seat 6 and a control mechanism 7; the base plate is a rectangular plate; the side enclosure is a rectangular frame fixed on the surface of the base plate, and the shape and size of the inner side of the side enclosure frame match the outer shape of a qualified six-point backrest backboard; there are two positioning columns, including a base I 3-1 and a positioning shaft 3-2; the base I is a rectangular cylinder fixed on the surface of the base plate on the inner side of the side enclosure; the positioning shaft is arranged on the surface of the base I; there are fourteen reference columns, including a base II 4-1 and a reference step 4-2; the base II is an L-shaped column fixed at intervals on the surface of the base plate of the three rectangular sides on the inner side of the side enclosure; the reference step is cylindrical and fixed on the surface of the base II; there are fourteen fixing devices, including a base III 5-1, a flipping mechanism 5-2 and a clamping mechanism 5-3; the base III is a rectangular column, fixed at intervals on the surface of the substrate of the three rectangular sides outside the side enclosure; the flip mechanism includes an articulated seat 5-2-1, a rocker 5-2-2, a locking column 5-2-3, a locking pin 5-2-4 and a wrench I 5-2-5; the articulated seat is fixed on the surface of the base III, a hinge shaft is provided at the rear end of the articulated seat, and a locking through hole is provided at the front end; the rocker is a long strip, the rear end of which is hinged to the rear end of the articulated seat, and the front end is provided There is a through hole; the locking column is a circular cylinder, inserted into the locking through hole at the front end of the hinge seat, and a spiral groove is provided on the outer circle of the locking column; the locking pin is fixed to the upper part of the spiral groove of the locking column through the through hole above the hinge seat; the wrench I is fixed to the outer end of the locking column; the clamping mechanism is fixed in the through hole at the front end of the rocker; the detection seat is a plurality of, including, base IV 6-1, detection rod 6-2, cover plate 6-3, spring 6-4, Cable 6-5 and fixed pulley 6-6; the base IV is a Z-shaped or T-shaped column with a rectangular cross section, and a through hole with an internal step is vertically arranged in the lateral extension section of the upper part of the base IV; the detection rod is inserted into the through hole of the base IV, and a detection head is arranged at its upper end, and the size and shape of the detection head match the installation hole to be detected; the shape of the cover plate matches the surface of the through hole of the base IV, and the inner hole matches the shape and size of the detection head; the spring is sleeved on the rod part of the detection rod, the upper end contacts the bottom of the detection head, and the lower end contacts the step of the through hole of the base IV; the cable is connected between the bottom of the detection rod and the control mechanism; there are several fixed pulleys, which are arranged at the position where the cable between the base IV and the control mechanism needs to change direction; in addition, the structure of the detection seat is basically the same, and the only difference is that one or two detection rods are arranged on the same base IV, and the shape of the base IV; the total number of the detection rods is the same as the number of installation holes of the six-point backrest backboard to be detected;There are three control mechanisms, which are arranged in parallel at the corners of the base plate, including a base V7-1, a hollow screw rod I7-2, a fastening nut I7-3, a sliding rod I7-4, a wrench II7-5, a connecting rod I7-6 and a pull plate 7-7; the base V is a U-shaped structure, with a plurality of through holes on the front vertical plate and a through hole in the middle of the rear vertical plate; a hinged cap is extended from the rear end of the hollow screw rod I, and the threaded section is inserted into the through hole of the rear vertical plate of the base V from the outside to the inside; the fastening nut I is screwed onto the hollow screw rod I from the inside of the rear vertical plate of the base V, thereby fixing the hollow screw rod I to the rear of the base V. The vertical plate; the slide bar I is sleeved in the through hole of the hollow screw rod I; the front end of the wrench II is provided with a U-shaped opening with two parallel sides bent into an L shape, and the front end of the short side of the L-shaped bend is narrowed inward; and hinge holes are provided at the front and rear ends of the short side of the L-shaped bend; the rear end head of the slide bar I is hinged to the front end of the short side of the L-shaped bend; the connecting rod I is a parallel structure, one end of which is hinged to the rear end of the short side of the L-shaped bend, and the other end is hinged to the rear end of the hollow screw rod I; the pull plate is a rectangular plate, and a cable fixing hole corresponding to the through hole of the front vertical plate of the base V is provided on the pull plate, and the fixing hole is fixed to the front end of the L-shaped bend. Connected to the front end of the slide rod I; wherein, the fixed position and height of the reference column are based on the convex step of the qualified six-point backrest backboard being placed in the side frame body with the inner surface of the convex step in close contact with the upper surface of the corresponding reference step of the reference column and the upper surfaces of all the reference steps being on the same plane; the fixed position and height of the positioning column are based on the two through holes at the diagonal positions in the middle of the six-point backrest backboard being respectively inserted on the positioning shaft when the inner surface of the convex step of the qualified six-point backrest backboard is in close contact with the upper surface of the corresponding reference step of the reference column; the fixed position and height of the clamping mechanism are based on the The degree is based on the fact that after the fixing device is in the clamping state, the clamping surfaces of each clamping mechanism coincide with the upper surface of the corresponding reference step and are in close contact; the fixed position and height of the detection rod are based on the fact that a qualified six-point backrest backboard is inserted on the positioning shaft, and after all the fixing devices are in the clamping state, each detection rod is aligned with the mounting hole it detects; the cables of all detection rods are divided into three groups after being collected and diverted by the fixed pulley, and are respectively fixed in the corresponding cable fixing holes on the pull plate through the through holes of the front vertical plate of the base V, and each cable is ensured to be in a tensioned state, that is, the spring of the detection seat is in a compressed state. During the specific inspection, the convex step of the six-part backrest to be inspected is placed on the positioning column and the reference column with the convex step facing upwards. At this time, the two through holes at the diagonal positions in the middle of the six-part backrest to be inspected should be respectively inserted on the positioning shaft, and the inner surface of the convex step of the six-part backrest to be inspected should be in close contact with the upper surface of the corresponding reference step; the rocker of each fixing device is rotated to the inner side of the side enclosure and perpendicular to the respective base III, and the wrench I is pulled to put the locking column in the locking position; each clamping mechanism is set to the clamping position;At this time, the six-part backrest to be tested is fixed flat on the reference column. Pull the wrench II of the control mechanism in turn, the cable is relaxed, and the detection rods controlled by each cable move upward under the action of the spring. Since the size and shape of the detection head at the upper end of the detection rod match the installation hole to be detected, the detection head should enter the corresponding installation hole. At this time, looking down from the six-part backrest to be tested, you can see that each detection head emerges from the installation hole. If the detection head emerges from the installation hole, it is considered that the hole position of the installation hole meets the design requirements; otherwise, it is considered not to meet the design requirements. Since the cables of all detection rods are fixed on the control mechanism, when all the control mechanism wrenches II are pulled down to the relaxed position, the detection of the hole positions of all installation holes is completed. It can be seen that the beneficial technical effect of the welding surface inspection fixture for the installation holes of the six-part backrest backboard of the rear seat of the automobile of the utility model is that it can detect the hole positions of all installation holes at one time while ensuring that the six-part backrest backboard is flat, and the method is simple and the results are reliable. ;

[0026] As one of the preferred schemes, the clamping mechanism includes a hollow screw rod II 5-3-1, a fastening nut II 5-3-2, a sliding rod II 5-3-3, a wrench III 5-3-4, a connecting rod II 5-3-5, a screw rod 5-3-6, a cylindrical pressure head 5-3-7, a spring 5-3-8 and an adjusting nut 5-3-9; the rear end of the hollow screw rod II is extended with a hinged cap, and the threaded section is inserted into the through hole of the front end of the rocker; the fastening nut II is screwed onto the hollow screw rod, thereby fixing the hollow screw rod to the front end of the rocker rod; the sliding rod II is sleeved in the through hole of the hollow screw rod II; The front end of the wrench III is provided with a U-shaped opening with two parallel sides bent into an L shape, and the front end of the short side of the L-shaped bend is narrowed inward; and hinge holes are provided at the front and rear ends of the short side of the L-shaped bend; the rear end head of the slide rod II is hinged to the front end of the short side of the L-shaped bend; the connecting rod II is a parallel structure, one end is hinged to the rear end of the short side of the L-shaped bend, and the other end is hinged to the rear end of the hollow screw; the screw is screwed on the lower end of the slide rod II; the spring is sleeved between the adjusting nut of the screw and the cylindrical pressure head; the spring is sleeved on the screw; the cylindrical pressure head is installed at the lower end of the screw. The connecting rod clamping structure is not only simple in structure and easy to operate, but also low in cost. The spring is set between the adjusting nut and the cylindrical pressure head to avoid "hard contact" between the cylindrical pressure head and the six-point backrest backboard to be tested when the backboard is curled or warped, which may cause damage to the inspection fixture; at the same time, it is ensured that the pressing force of all cylindrical pressure heads on the six-point backrest backboard to be tested is basically the same. The setting of the adjusting nut can adjust the pressing force and pressing stroke of the cylindrical pressure head to ensure the inspection quality.

[0027] As one of the preferred solutions, the size and shape of the detection head match the detected mounting hole, including that the outer contour of the detection head is 0.5-1.0 mm smaller than the inner contour of the detected mounting hole. Therefore, after all the detection heads emerge from the mounting holes, the gap between the detection heads and the mounting holes is observed to estimate the offset of the mounting holes. The gap width can be measured with a gauge to quantitatively analyze the offset of the mounting holes.

[0028] Obviously, the beneficial technical effect of the welding surface inspection fixture for the mounting holes of the six-part backrest backboard of the rear seat of the automobile of the utility model is that it can detect the hole positions of all mounting holes at one time while ensuring that the six-part backrest backboard is flat, and the method is simple and the result is reliable.

Claims

1. A welding surface inspection tool for mounting holes of six-point backrest backboard of rear seat of automobile, characterized in that: The inspection tool includes a base plate, a side enclosure, a positioning column, a reference column, a fixing device, a detection seat and a control mechanism; the base plate is a rectangular plate; the side enclosure is a rectangular frame fixed on the surface of the base plate, and the shape and size of the inner side of the side enclosure frame match the outer shape of a qualified six-point backrest backboard; there are two positioning columns, including a base I and a positioning shaft; the base I is a rectangular cylinder fixed on the surface of the base plate on the inner side of the side enclosure; the positioning shaft is arranged on the surface of the base I; there are fourteen reference columns, including a base II and a reference step; the base II is an L-shaped cylinder fixed at intervals on the surface of the base plate at three rectangular sides on the inner side of the side enclosure; the reference step is cylindrical and fixed on the surface of the base II; there are fourteen fixing devices, including a base III, a flipping mechanism and a clamping mechanism; the base III is A rectangular cylinder is fixed at intervals on the surface of the substrate of the three rectangular sides outside the side enclosure; the flip mechanism includes an articulated seat, a rocker, a locking column, a locking pin and a wrench I; the articulated seat is fixed on the surface of the base III, a hinge shaft is provided at the rear end of the articulated seat, and a locking through hole is provided at the front end; the rocker is a long strip rod, the rear end of which is hinged to the rear end of the articulated seat, and a through hole is provided at the front end; the locking column is a circular cylinder, which is inserted into the locking through hole at the front end of the articulated seat, and a spiral groove is provided on the outer circle of the locking column; the locking pin is fixed directly above the spiral groove of the locking column through the through hole above the articulated seat; the wrench I is fixed to the outer end of the locking column; the clamping mechanism is fixed in the through hole at the front end of the rocker; the detection seat is a plurality of, including a base IV, a detection rod, a cover plate, a spring, Cable and fixed pulley; the base IV is a Z-shaped or T-shaped column with a rectangular cross section, and a through hole with an internal step is vertically arranged in the transverse extension section at the upper part of the base IV; the detection rod is inserted into the through hole of the base IV, and a detection head is arranged at its upper end, and the size and shape of the detection head match the installation hole to be detected; the shape of the cover plate matches the surface of the through hole of the base IV, and the inner hole matches the shape and size of the detection head; the spring is sleeved on the rod part of the detection rod, the upper end contacts the bottom of the detection head, and the lower end contacts the step of the through hole of the base IV; the cable is connected between the bottom of the detection rod and the control mechanism; there are several fixed pulleys, which are arranged between the base IV and the control mechanism The position where the cable between them needs to change direction; in addition, the structures of the detection seats are basically the same, and the only difference is that one or two detection rods are arranged on the same base IV, and the shape of the base IV; the total number of the detection rods is the same as the number of mounting holes of the six-point backrest back plate to be detected; the control mechanisms are three, which are arranged in parallel at the corners of the base plate, including a base V, a hollow screw rod I, a fastening nut I, a sliding rod I, a wrench II, a connecting rod I and a pull plate; the base V is a U-shaped structure, a plurality of through holes are arranged on the front vertical plate, and a through hole is arranged in the middle of the rear vertical plate; the rear end of the hollow screw rod I is extended with a hinged cap, and the threaded section is inserted from the outside to the inside into the through hole of the rear vertical plate of the base V;The fastening nut I is screwed onto the hollow screw rod I from the inner side of the rear vertical plate of the base V, thereby fixing the hollow screw rod I on the rear vertical plate of the base V; the sliding rod I is sleeved into the through hole of the hollow screw rod I; the front end of the wrench II is provided with a U-shaped opening with two parallel sides bent into an L shape, and the front end of the short side of the L-shaped bend is narrowed inward; and hinge holes are provided at the front and rear ends of the short side of the L-shaped bend; the rear end head of the sliding rod I is hinged to the front end of the short side of the L-shaped bend; The connecting rod I is a parallel structure, one end of which is hinged to the rear end of the short side of the L-shaped bend, and the other end is hinged to the rear end of the hollow screw I; the pull plate is a rectangular plate, on which a cable fixing hole corresponding to the through hole of the front vertical plate of the base V is provided, and is fixedly connected to the front end head of the slide rod I; wherein, the fixing position and height of the reference column are such that the convex step of the qualified six-point backrest backboard is placed upward in the side enclosure frame, and the inner surface of the convex step is tightly connected to the upper surface of the corresponding reference column reference step The fixed position and height of the positioning column are based on the condition that the inner surface of the convex step of the qualified six-point backrest is in close contact with the upper surface of the corresponding reference column reference step, and the two through holes at the diagonal position in the middle of the six-point backrest are respectively inserted on the positioning shaft; the fixed position and height of the clamping mechanism are based on the clamping surface of each clamping mechanism coinciding with and in close contact with the upper surface of the corresponding reference step after the fixing device is in the clamping state; the fixed position and height of the detection rod are based on the condition that the qualified six-point backrest is inserted on the positioning shaft, and after all the fixing devices are in the clamping state, each detection rod is aligned with the mounting hole detected by itself; the cables of all detection rods are divided into three groups after being collected and turned by the fixed pulley, and are respectively fixed in the corresponding cable fixing holes on the pull plate through the through holes of the front vertical plate of the base V, and each cable is ensured to be in a tensioned state, that is, the spring of the detection seat is in a compressed state. ; 2. According to claim 1, the welding surface inspection fixture for the six-point backrest mounting hole of the rear seat of the automobile is characterized in that: The clamping mechanism, The invention comprises a hollow screw II, a fastening nut II, a sliding rod II, a wrench III, a connecting rod II, a screw, a cylindrical pressure head, a spring and an adjusting nut; the rear end of the hollow screw II is extended with a hinged cap, and the threaded section is inserted into the through hole of the front end of the rocker; the fastening nut II is screwed on the hollow screw, thereby fixing the hollow screw to the front end of the rocker; the sliding rod II is sleeved in the through hole of the hollow screw II; the front end of the wrench III is provided with a U-shaped opening with two parallel sides bent into an L shape, and the L-shaped bending The front end of the short side of the L-shaped bend is narrowed inward; and hinge holes are provided at the front and rear ends of the short side of the L-shaped bend; the rear end head of the sliding rod II is hinged to the front end of the short side of the L-shaped bend; the connecting rod II is a parallel structure, one end of which is hinged to the rear end of the short side of the L-shaped bend, and the other end is hinged to the rear end of the hollow screw; the screw is screwed on the lower end of the sliding rod II; the spring is sleeved between the adjusting nut of the screw and the cylindrical pressure head; the spring is sleeved on the screw; the cylindrical pressure head is installed at the lower end of the screw.

3. The welding surface inspection fixture for the six-part backrest mounting hole of the rear seat of the automobile according to claim 1 or 2, characterized in that: The size and shape of the detection head match the detected mounting hole, including that the outer contour of the detection head is 0.5-1.0 mm smaller than the inner contour of the detected mounting hole.

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