A multifunctional composite inspection tool for automobile interior door panels and its use method

Abstract

A multifunctional composite inspection tool for automobile interior door panels and a method for using the same belong to the field of detection technology, and overcome the problem that the prior art cannot realize the three-coordinate full-size front and back detection function of the automobile interior injection molded door panel body and the door panel assembly. The invention is characterized in that a door panel iron door sheet metal profiling block, a positioning and locking mechanism, a door panel substrate main positioning block, a Y-direction limit mechanism and a Z-direction limit mechanism are installed in front of the inspection tool bottom plate, and a door panel assembly back profiling block, a back positioning and clamping spring sheet, a door panel assembly back handle profiling block and a door panel substrate back positioning block are installed behind the inspection tool bottom plate. The beneficial effect is that only one set of inspection tools needs to be developed, and the three-coordinate full-size front and back full-size detection functions of the injection molded door panel body and the door panel assembly and the imitation car door sheet metal matching gap measurement function are realized through the disassembly, assembly and switching of different mechanisms, thereby reducing the inspection tool development cost, realizing rapid installation and rapid disassembly, and improving the detection accuracy and the efficiency of the detection process.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile interior decoration part detection, and in particular relates to a multifunctional composite inspection tool for automobile interior decoration door panels and a use method thereof. Background Art

[0002] In the production of automobile interior door panels, in order to control the three-dimensional geometric full size and outline size of automobile interior door panels, it is necessary to test the geometric size of the injection molded door panel body and the welded door panel assembly respectively. Among them, the geometric size detection of the injection molded door panel body is to detect the deviation of the injection molded door panel itself, and the detection of the welded door panel assembly is to detect the outline size of the welded door panel assembly. The outline size detection of the door panel assembly is to simulate the matching size detection of the actual assembly of the automobile interior door panel between the door sheet metals. The existing automobile door panel inspection fixtures cannot simultaneously achieve the above-mentioned functional detection requirements.

[0003] Example 1, the utility model with application number CN201420107784.3 discloses a detection tool for automobile door interior panels, which includes a door panel inspection fixture bottom plate, a detection contour reference and a clamping mechanism, wherein the clamping mechanism includes an operating mechanism and a plurality of clamping heads, wherein the clamping heads are evenly arranged on the inner side of the detection contour reference through the clamping base, the operating mechanism is fixed to the upper part of the door panel inspection fixture bottom plate, and the loosening or tightening action of the plurality of clamping heads is controlled by a pull rope, and a closed hole is formed at the front end of the upper and lower clamping heads when they are closed. The utility model has a simple structure and is easy to operate, which reduces the labor intensity of workers and improves work efficiency. However, the utility model has a single function, which is to detect the front of the automobile interior door panel and can only realize the matching size detection function of the assembly door panel and the door sheet metal, and cannot realize the three-coordinate full-size detection of the injection-molded door panel body and the door panel assembly. In addition, the operating mechanism of the utility model is connected to the clamping head by a pull rope, and the movement of the upper and lower clamps of multiple clamping heads is controlled by the pull rope. Since the pull rope is easy to loosen, measurement errors will occur, affecting the measurement accuracy.

[0004] Example 2, the utility model with application number CN201320894183.7 discloses a rear door panel inspection fixture, which includes a bottom plate, two vertical plates respectively fixed on both sides of the bottom plate, a base plate rotatably arranged between the vertical plates, a measuring block arranged on the base plate, and a gauge with a measuring end fixedly connected to the base plate at the rear end and extending into the confined space of the measuring block. The measuring block includes a U-shaped edge measuring block fixedly connected to the base plate and a door panel top edge measuring block. The door panel top edge measuring block is integrally formed with a connecting plate and is detachably fixedly connected to the base plate through the connecting plate. The rear door panel inspection fixture of the utility model is used to simulate the position of the rear door of the vehicle body in the whole vehicle, so as to realize the inspection of the parts matching with the rear door panel in the non-installed state. However, the utility model can only realize the matching front size inspection function of the rear door assembly panel and the door sheet metal. The base plate rotatably arranged between the two vertical plates of the utility model can be flipped arbitrarily, which is only for the convenience of inspection and improving the convenience of large-volume rear door panel inspection. Therefore, the utility model cannot realize the inspection function of the three-coordinate full-size front and back sides of the injection-molded door panel body and the door panel assembly.

[0005] Example 3, the invention with application number CN201010263469.6 discloses a car door panel inspection fixture that can be rotated on two sides, including a trolley, a base plate, and a latch. The car door panel inspection fixture that can be rotated on two sides described in the invention is to respectively install a left door panel inspection fixture and a right door panel inspection fixture on the two sides of a base plate; a rotating positioning arm provided with a rotating shaft and a pin hole is respectively fixedly provided at the center of the two side walls of the base plate; the base plate is mounted on the pivot of the bracket of the trolley provided with casters through the rotating shaft, and the bracket insertion hole and the pin hole of the rotating positioning arm are pinned and fixed by a latch. The technical solution only solves the problems and shortcomings of high cost, large space occupied for use and storage, and inconvenience in moving and rotating the assembly detection, and facilitates the movement and rotation of the assembly detection. The so-called rotation refers to rotating the base plate to make the base plate upright during assembly detection, and inserting the latch into the pin hole of the standing foot of the rotating positioning arm and the pin hole of the standing foot of the rotating positioning arm. The bracket is fixed with a pin in the socket for assembly inspection; when inspecting the left door panel or the right door panel body, the bottom plate is rotated, the left door panel or the right door panel body on the side to be inspected is horizontally facing upward, and a pin is inserted into the pin hole of the cross arm of the rotating positioning arm and fixed with the bracket socket for left door panel or the right door panel body inspection. In other words, no matter how it is rotated, only the front of the left door panel or the right door panel is inspected, and the back of the left door panel or the right door panel cannot be inspected, and the three-dimensional geometric full-size inspection function of the injection molded door panel body and the door panel assembly cannot be realized. Moreover, the left door panel or the right door panel body inspection is a flat inspection, which is inconsistent with the actual state of the automobile door panel when it is installed. There is a measurement error and the measurement accuracy will also be reduced.

[0006] Example 4, the utility model with application number CN201720012331.6 discloses a vertical automobile interior door panel inspection fixture, including a vehicle frame, a door panel fixing frame for mounting the interior door panel is detachably provided on the vehicle frame, and the plane where the door panel fixing frame is located is perpendicular to the horizontal plane, so that the interior door panel is in a vertical state when installed on the door panel fixing frame, a door panel detection mechanism is hinged on the door panel fixing frame, which can be flipped forward and backward to approach or move away from the door panel fixing frame, and a plurality of detection holes for inserting a dial indicator are provided on the door panel detection mechanism, and the positions of the detection holes correspond to the positions of the points to be detected on the interior door panel. The utility model inspection fixture adopts a vertical structure, which is completely consistent with the loading state, but the utility model can only realize the matching size detection function of the assembly door panel and the door sheet metal, and the dial indicator dot detection can only measure fixed measurement points, and cannot realize the three-coordinate full-size detection function of the injection molded door panel body and the door panel assembly.

[0007] Example 5. The invention with application number CN201710690070.8 discloses a composite inspection fixture, including an inspection fixture base plate, on which a detection component for detecting the door hole position is provided, including a positioning pin, the positioning pin including a positioning section at the bottom, an adjustment section in the middle and an operating section at the top, the adjustment section is axially provided with a first adjustment groove, and its bottom end is connected to one end of a second adjustment groove arranged circumferentially, a fixed seat, a locking plate is installed on the top, and a detection reference plate is installed on the bottom; a locking hole is opened on the locking plate; a detection hole is provided on the detection reference plate, and the adjustment section freely passes through along the middle of the fixed seat; the fixed pin is a spring pin slidably installed in the first adjustment groove, which supports the adjustment section on the base; a rotating pin, which is used to drive the positioning pin to rotate; the detection part extends into the detection reference plate along the detection hole, and is used to detect the distance between the adjustment section and the detection reference plate when the adjustment section moves. The invention realizes accurate measurement of the detected hole by adopting a positioning pin that can move up and down and rotate in cooperation with an external detection part. The axial first adjustment groove and the circumferential second adjustment groove on the positioning pin of the invention form an L-shaped adjustment groove, wherein the axial first adjustment groove is used to install a fixing pin that can move axially up and down, and the fixing pin is a spring pin slidably installed in the first adjustment groove. The outer end of the spring pin passes through the locking hole and supports the base on the adjustment section, which is used to axially adjust the fixed seat and then axially adjust the detection part; the circumferential second adjustment groove is used to install a rotating pin, one end of the rotating pin is slidably installed in the second adjusting groove, and the other end extends radially to the side opposite to the adjustment section. The detection pin is circumferentially adjusted by the rotating pin, and the second adjustment groove is circumferentially arranged to limit the axial movement of the fixed seat. Furthermore, the locating pin of the invention is provided with a fixed pin which can move axially up and down; the bottom of the locating pin is provided with a rotating pin for driving the locating pin to rotate, and the two are used at the same time. During detection, the locating pin is detected in both axial and circumferential directions to ensure that the reference holes of the inner and outer panels are accurately detected. In other words, the L-shaped adjustment groove of the invention is respectively installed with a locating pin and a rotating pin, which has both detection and positioning functions, but the L-shaped adjustment groove does not work for clamping or loosening the interior door panel.

[0008] Example 6, the invention with application number CN201510840889.9 discloses a combined multifunctional door inspection fixture, including a base plate and an inspection body arranged on the base plate and matching the front and rear doors, a front door front detection unit is arranged at the front of the outer side of the inspection body, and a front door rear upper detection unit, a front door rear lower detection unit, a rear door front upper detection unit and a rear door front lower detection unit are arranged at the inner side of the inspection body. The detection unit can be rotated and folded, and a hinge nut detection support is movably arranged on the inspection body. This invention can perform a joint inspection on the front and rear doors at the same time. In addition, a function for measuring the position deviation of the door hinge nuts is added. However, it can be seen from the attached drawings that this invention is a multifunctional inspection of the front and rear doors of the automobile exterior door panels, not an inspection of the automobile interior door panels. When in use, the front exterior door and the rear exterior door are separately fixed on the inspection body for positioning inspection, or the front exterior door and the rear exterior door are simultaneously fixed on the inspection body for inspection. The multifunctionality only overcomes the problem of mutual interference between the inspection unit and the door to be inspected and the inspection unit. It can perform a joint inspection on the front and rear doors at the same time, but cannot realize the three-coordinate full-size inspection function of the automobile interior door panel assembly. Summary of the invention

[0009] The problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multifunctional composite inspection tool for automobile interior door panels, which is consistent with the actual state of automobile interior door panels when installed, has the function of three-coordinate full-size measurement of the front and back sides of the injection-molded door panel body and the door panel assembly, and is a multifunctional inspection tool for measuring the gap between imitation car door sheet metal matching, and has high measurement accuracy, low manufacturing cost, and convenient storage and use of the inspection tool. A method for using the inspection tool is provided.

[0010] The technical solution adopted by the multifunctional composite inspection tool for automobile interior door panels of the present invention includes a base, a inspection tool bottom plate is connected to the base, a positioning and locking mechanism is installed on the inspection tool bottom plate, a door panel iron door sheet metal profiling block is installed in front of the inspection tool bottom plate, and the inner wall and outer wall of the door panel iron door sheet metal profiling block are respectively provided with front lugs which are integrated with the door panel iron door sheet metal profiling block, a screw hole is provided on the front lug and a door panel iron door sheet metal simulation block locking nut is installed therein, and a screw hole for locking the door panel iron door sheet metal simulation block with the door panel is made on the upper surface of the door panel iron door sheet metal profiling block. The iron door sheet metal profiling hole simulates the iron door sheet metal hole with a snap fit. A positioning locking mechanism mounting seat is installed in front of the bottom plate of the inspection fixture. A positioning locking mechanism that can be installed simulated with the door panel is installed on the positioning locking mechanism mounting seat. The main positioning block of the door panel base plate and the Y-axis positioning reference block are installed on the inspection fixture bottom plate in the middle of the door panel iron door sheet metal profiling block. Measuring positioning locking rods are installed at both ends of the Y-axis positioning reference block. The front pressing spring of the door panel assembly is installed on the main positioning block of the door panel base plate. Y and Z are also installed in front of the bottom plate of the inspection fixture. A direction limiting mechanism is provided, wherein a coordinate system reference hole is also installed on the bottom plate of the inspection fixture, and a coordinate system reference circle for establishing a measuring coordinate system is installed therein; a back profiling block of a door panel assembly and a back positioning and pressing spring piece are installed behind the bottom plate of the inspection fixture, a Y-direction positioning column of a door panel substrate is installed on the back profiling block of the door panel assembly, a back lug which is integrated with the back profiling block of the door panel assembly is provided on the back profiling block of the door panel assembly, a back positioning pin of the door panel assembly is installed on the back lug, a back handle profiling block of the door panel assembly and a back positioning block of the door panel substrate are installed on the inspection fixture bottom plate at the middle position of the back profiling block of the door panel assembly, and a back pressing spring piece of the door panel assembly is installed on the back positioning block of the door panel substrate.

[0011] Three front lugs are respectively arranged on the inner and outer sides of the door panel iron door sheet metal profiling block, which are integrated with the door panel iron door sheet metal profiling block. A screw hole is arranged on each front lug, and a door panel iron door sheet metal simulation block locking nut is installed therein. Four simulation block handles for facilitating the installation or removal of the door panel iron door sheet metal profiling block are also installed on the outer wall of the door panel iron door sheet metal profiling block, and 10 iron door sheet metal profiling holes simulating iron door sheet metal holes are made on the upper side of the door panel iron door sheet metal profiling block.

[0012] Ten door panel base plate Y-direction positioning columns are installed around the back profiling block of the door panel assembly, three back lugs that are integrated with the back profiling block of the door panel assembly are provided at the bottom and lower left corner of the back profiling block of the door panel assembly, a back positioning pin of the door panel assembly is installed on each back lug, and seven back positioning and clamping springs are installed at the back of the inspection fixture bottom plate.

[0013] The positioning and locking mechanism comprises a T-shaped hook sleeve, a positioning seat is provided at the right end of the T-shaped hook sleeve, an axial pin hole for connecting with the bottom plate of the inspection tool is processed on the positioning seat, a through axial through hole is processed in the center of the T-shaped hook sleeve, a U-shaped groove is processed in the axial middle position of the cylindrical sleeve at the left end of the T-shaped hook sleeve, the bottom end of the U-shaped groove is perpendicular to the axis to form a radial slideway, and the two ends of the U-shaped groove form two axial limiting grooves parallel to the axis, a rotary switch control rod is installed in the U-shaped groove of the T-shaped hook sleeve, a left groove is processed at the left end of the T-shaped hook sleeve, a right groove is processed at the right end of the T-shaped hook sleeve, and the axial through hole of the T-shaped hook sleeve is processed. A reverse tensioning positioning hook is installed in the middle, a positioning hook head is provided at the left end of the reverse tensioning positioning hook, a positioning shoulder for limiting the limit nut is provided at the right end of the reverse tensioning positioning hook, a positioning groove cooperating with the rotary switch control rod is provided in the middle of the reverse tensioning positioning hook, a hook sleeve is installed in the left groove of the T-shaped hook sleeve, a spring is installed in the right groove of the T-shaped hook sleeve, a spring seat and a limit nut are installed on the reverse tensioning positioning hook at the right end of the spring, the rotary switch control rod is simultaneously inserted into the positioning groove of the reverse tensioning positioning hook, and a spherical head for easy manual operation is installed on the rotary switch control rod.

[0014] One of the methods for using the multifunctional composite inspection fixture for automobile interior door panels described in the present invention is that when preparing to carry out a matching inspection of an automobile interior door panel assembly and a front sheet metal of a vehicle body, the main positioning block and the positioning locking mechanism of the door panel substrate are removed, the front of the automobile interior door panel assembly to be tested is aligned with the door panel iron door sheet metal profiling block installed in front of the inspection fixture bottom plate, the buckle of the automobile interior door panel assembly is snapped into the iron door sheet metal profiling hole, the product is hung and pressed by the Y and Z direction limit mechanisms, the positioning locking rod is measured at both ends of the Y direction positioning reference block to press the product, and the gap surface difference requirements between the door panel assembly parts and the door panel iron door sheet metal profiling block are inspected by a special go / no-go gauge, a feeler gauge and a break gauge.

[0015] A second method of using the multifunctional composite inspection fixture for automobile interior door panels described in the present invention is that, when preparing to inspect the front dimension of the automobile interior door panel assembly, the main positioning block of the door panel substrate and the door panel iron door sheet metal profiling block are removed, the front of the automobile interior door panel to be inspected is aligned and installed on the positioning and locking mechanism in front of the inspection fixture bottom plate, the position of the product to be inspected is adjusted so that the product to be inspected can be smoothly loaded according to the positioning position on the inspection fixture, and then the product to be inspected is pressed by the positioning and locking mechanism, the product is hung and pressed by the Y and Z direction limit mechanisms, and then the product is pressed by measuring the positioning and locking rods at both ends of the Y-direction positioning reference block, and the product is inspected on the surface to be inspected using three coordinates. If the tolerance is within the range, the product is qualified, otherwise it is deemed unqualified.

[0016] A third method of using the multifunctional composite inspection fixture for automobile interior door panels described in the present invention is that, when preparing to inspect the front dimension of the automobile interior door panel frame, the Y-axis positioning reference block and the door panel iron door sheet metal profiling block are removed, and the front of the automobile interior door panel frame to be tested is aligned and installed on the positioning and locking mechanism in front of the inspection fixture bottom plate, and the position of the product to be tested is adjusted so that the product to be tested can be smoothly loaded according to the positioning position on the inspection fixture, and then the product to be tested is pressed by the positioning and locking mechanism, and then the product is pressed by the Y and Z direction limit mechanisms, and then the product to be tested is pressed by the front pressing spring of the door panel assembly on the main positioning block of the door panel substrate, and the product is inspected on the surface to be inspected using three coordinates. If the tolerance is within the range, the product is qualified, otherwise it is deemed unqualified.

[0017] A fourth method of using the multifunctional composite inspection fixture for automobile interior door panels described in the present invention is that, when preparing to inspect the back dimensions of an automobile interior door panel frame, the handle profiling block on the back of the door panel assembly is removed, the back of the automobile interior door panel frame to be inspected is aligned and installed on the back profiling block of the door panel assembly behind the inspection fixture bottom plate, the door panel assembly is positioned by the back locating pin, and the door panel frame is positioned on the back locating block of the door panel substrate, the product to be inspected is compressed by the back compression spring sheet of the door panel frame, and the back of the automobile interior door panel frame is compressed and positioned by the back positioning compression spring sheet, and the back dimensions of the door panel frame are measured by using three coordinates.

[0018] A fifth method of using the multifunctional composite inspection fixture for automobile interior door panels described in the present invention is to remove the back positioning block of the door panel substrate when preparing to inspect the back dimensions of the automobile interior door panel assembly, align the back of the automobile interior door panel assembly to be tested on the back profiling block of the door panel assembly behind the inspection fixture bottom plate, position it using the back positioning pin of the door panel assembly, attach the door panel handle to the back handle profiling block of the door panel assembly, press and position the back of the automobile interior door panel using the back positioning and clamping spring sheet, and measure the back dimensions of the assembly door panel by using three coordinates.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention adopts a multifunctional inspection fixture design concept. Inspection tools for the front and back of the automobile interior door panel are installed on the front and back of the inspection fixture base plate respectively. Different functions are realized by disassembly, assembly and switching of different mechanisms. The three-coordinate full-size front and back inspection functions of the injection-molded door panel body and the door panel assembly and the matching gap measurement function of the simulated door sheet metal are realized. The full-size measurement requirements of the automobile interior door panel are met, and the installation state of the interior door panel assembly and the whole vehicle door sheet metal are consistent in the simulated vehicle loading state, and the effect is consistent, which reduces the manufacturing cost, reduces the footprint of the inspection fixture, and can also avoid personnel from moving the inspection fixture frequently.

[0021] (2) The present invention realizes the functions of detecting the matching between the front face of the interior door panel assembly and the front face sheet metal of the vehicle body, detecting the front face size of the interior door panel assembly, detecting the front face size of the interior door panel frame, detecting the back face size of the interior door panel frame and detecting the back face size of the interior door panel assembly through the disassembly, assembly and switching of different mechanisms. If the development is carried out according to the traditional development model, five sets of inspection fixtures will be developed for the above-mentioned automobile interior door panel inspection project. According to the technical solution adopted by the present invention, only one set of inspection fixtures needs to be developed to meet different functional requirements, thereby reducing the development cost of the inspection fixtures.

[0022] (3) The present invention provides front lugs integrated with the door panel iron door sheet metal profiling block on the inner wall and the outer wall of the door panel iron door sheet metal profiling block, and a door panel iron door sheet metal simulation block locking nut is installed on each front lug, a positioning locking mechanism is installed on the bottom plate of the inspection fixture, and a back lug integrated with the door panel assembly back profiling block is provided on the back profiling block of the door panel assembly, and a door panel assembly back positioning pin is installed on each back lug, thereby realizing quick installation and quick disassembly. After installation, the locking and positioning effect of the tested automobile interior door panel is good, the inspection can be quickly carried out, and the measurement accuracy is improved. After disassembly, the inspection fixture is convenient to store and use, thereby improving the utilization rate of the inspection fixture.

[0023] (3) The positioning and locking mechanism of the present invention realizes the integration of positioning and opening and closing, and realizes the composite functions of positioning and opening and closing of the interior door panel with the same mechanism. It is easy to operate, helps to realize the rapid installation and rapid disassembly of the inspection fixture, and improves the accuracy of the inspection results and the efficiency of the inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG. 1 is a front view of the present invention,

[0025] Figure 2 is Figure 1 The rear view of

[0026] Figure 3 is Figure 2 The left view of

[0027] Figure 4 This is a schematic diagram of the matching detection structure of the front of the interior door panel assembly and the front sheet metal of the vehicle body of the present invention.

[0028] Figure 5 It is a schematic diagram of the front dimension detection structure of the interior door panel assembly of the present invention,

[0029] Figure 6 This is a schematic diagram of the front dimension detection structure of the interior door panel frame of the present invention.

[0030] Figure 7 This is a schematic diagram of the back size detection structure of the interior door panel frame of the present invention.

[0031] Figure 8It is a schematic diagram of the overall back size detection structure of the interior door panel of the present invention,

[0032] Fig. 9 is a three-dimensional schematic diagram of the positioning and locking mechanism of the present invention,

[0033] Fig.10 is a schematic diagram of the internal structure of the positioning and locking mechanism of the present invention,

[0034] Fig.11 It is a three-dimensional schematic diagram of the Y and Z direction limiting mechanism of the present invention.

[0035] In the figure:

[0036] 1. Checking fixture bottom plate, 2. Door panel iron door sheet metal profiling block,

[0037] 3. Y-axis positioning reference block, 4. Y and Z-axis limit mechanisms,

[0038] 41.Y and Z direction limit mechanism base,

[0039] 42. YZ limit block, 43. Upper end positioning and pressing spring limit sleeve,

[0040] 44. Spring piece installation rod, 45. Upper end positioning and pressing spring piece,

[0041] 5. Door panel base plate main positioning block, 6. Coordinate system reference hole,

[0042] 7.Measurement and positioning locking rod, 8.Positioning locking mechanism,

[0043] 81.T-shaped hook sleeve,

[0044] 811. Positioning seat, 812. U-shaped groove,

[0045] 813. Axial pin hole, 814. Left groove, 815. Axial through hole,

[0046] 816. Right groove, 82. Reverse tension positioning hook,

[0047] 821. Positioning hook head, 822. Positioning shoulder, 823. Positioning groove,

[0048] 83.Hook, 84.Spring,

[0049] 85. Spring seat, 86. Limit nut,

[0050] 87. Rotary switch lever, 88. Ball head.

[0051] 9. Simulation block handle, 10. Door panel base plate Y-axis positioning column,

[0052] 11. Rear positioning and pressing spring, 12. Rear profiling block of door panel assembly,

[0053] 13. Handle profiling block on the back of the door panel assembly, 14. Positioning block on the back of the door panel base plate,

[0054] 15. Check fixture base, 16. Door panel assembly back positioning pin,

[0055] 17. Locking nut for door panel, iron door sheet metal simulation block, 18. Iron door sheet metal profiling hole,

[0056] 19. The front of the door panel assembly presses the spring piece, 20. The back of the door panel assembly presses the spring piece,

[0057] 21. Position the locking mechanism mounting seat. DETAILED DESCRIPTION

[0058] The present invention will be described in detail below in conjunction with the accompanying drawings. Specific implementation method 1

[0060] like Figure 1 to Figure 5As shown, the technical solution adopted by the multifunctional composite inspection fixture for automobile interior door panels of the present invention includes two left and right inspection fixture bases 15, and the inspection fixture bottom plates 1 are connected to the two left and right inspection fixture bases 15. A door panel iron door sheet metal profiling block 2 is installed in front of the inspection fixture bottom plate 1. The door panel iron door sheet metal profiling block 2 is a profiling simulation block made by completely simulating the iron door sheet metal of the vehicle body. Three front lugs that are integrated with the door panel iron door sheet metal profiling block 2 are respectively arranged on the inner wall and the outer wall of the door panel iron door sheet metal profiling block 2, and a screw hole is arranged on each front lug, and a door panel iron door sheet metal simulation block locking nut 17 is installed therein. Four screw holes are installed on the outer wall of the door panel iron door sheet metal profiling block 2 to facilitate the installation of the door panel iron door sheet metal profiling block 2. Or disassembled simulation block handle 9, on the door panel iron door sheet metal profiling block 2, there are made 10 iron door sheet metal profiling holes 18 for simulating iron door sheet metal holes for buckling with the door panel; a positioning locking mechanism mounting seat 21 is installed in front of the inspection fixture bottom plate 1, and a positioning locking mechanism 8 that can be simulated and installed with the door panel is installed on the positioning locking mechanism mounting seat 21; a door panel base plate main positioning block 5 and a Y-direction positioning reference block 3 are installed on the inspection fixture bottom plate 1 in the middle position of the door panel iron door sheet metal profiling block 2, and a measuring positioning locking rod 7 is installed at both ends of the Y-direction positioning reference block 3, and three door panel assembly front pressing springs 19 are installed on the door panel base plate main positioning block 5, and a plurality of Y and Z are also installed in front of the inspection fixture bottom plate 1. A direction limiting mechanism 4 is provided with four coordinate system reference holes 6 processed at the four corners of the inspection fixture bottom plate 1 and a tubular coordinate system reference circle for establishing a measuring coordinate system is installed therein; a back profiling block 12 of a door panel assembly with rounded corners is installed behind the inspection fixture bottom plate 1, 10 Y-direction positioning columns 10 of a door panel substrate are installed around the back profiling block 12 of the door panel assembly, 7 back positioning and clamping springs 11 are installed behind the inspection fixture bottom plate 1, and three back lugs which are integrated with the back profiling block 12 of the door panel assembly are provided at the bottom and lower left corner of the back profiling block 12 of the door panel assembly, and a back positioning pin 16 of the door panel assembly is installed on each back lug, a back handle profiling block 13 of the door panel assembly and a back positioning block 14 of the door panel substrate are installed on the inspection fixture bottom plate 1 at the middle position of the back profiling block 12 of the door panel assembly, and three back clamping springs 20 of the door panel assembly are installed on the back positioning block 14 of the door panel substrate.

[0061] like Fig. 9 and Fig.10As shown, the positioning locking mechanism 8 includes a T-shaped hook sleeve 81, a positioning seat 811 is provided at the right end of the T-shaped hook sleeve 81, and four axial pin holes 813 for connecting with the inspection tool base plate 1 are processed on the positioning seat 811, and a through axial through hole 815 is processed in the center of the T-shaped hook sleeve 81, and a U-shaped groove 812 is processed in the axial middle position of the cylindrical sleeve at the left end of the T-shaped hook sleeve 81. The bottom end of the U-shaped groove 812 is perpendicular to the axis to form a radial slideway, and the two ends of the U-shaped groove 812 form two axial limiting grooves parallel to the axis. A rotary switch control rod 87 is installed in the U-shaped groove 812 of the T-shaped hook sleeve 81, a left groove 814 is processed at the left end of the T-shaped hook sleeve 81, and a right groove 816 is processed at the right end of the T-shaped hook sleeve 81. 15 is provided with a reverse tensioning positioning hook 82, a positioning hook head 821 is provided at the left end of the reverse tensioning positioning hook 82, a positioning shoulder 822 for limiting the limiting nut 86 is provided at the right end of the reverse tensioning positioning hook 82, a positioning groove 823 cooperating with the rotary switch control rod 87 is provided in the middle of the reverse tensioning positioning hook 82, a hook sleeve 83 is installed in the left groove 814 of the T-shaped hook sleeve 81, a spring 84 is installed in the right groove 816 of the T-shaped hook sleeve 81, a spring seat 85 and a limiting nut 86 are installed on the reverse tensioning positioning hook 82 at the right end of the spring 84, the rotary switch control rod 87 is simultaneously inserted into the positioning groove 823 of the reverse tensioning positioning hook 82, and a spherical head 88 for convenient manual operation is installed on the rotary switch control rod 87; The spring 84 and the spring seat 85 are sleeved on the reverse tensioning positioning hook 82 and inserted into the positioning seat 811 together, and are controlled by the rotary switch control rod 87. The tension of the reverse tensioning positioning hook is required to be above 40N, which completely simulates the actual vehicle assembly to make the measurement more accurate. When in use, the rotating control rod 87 is operated by the spherical head 88 to make the rotating control rod 87 leave the positioning groove 823, and the spring 84 pushes the reverse tensioning positioning hook 82 to move to the left in the axial through hole 815 of the T-shaped hook sleeve 81, so that the positioning hook head 821 presses the measured object, and then the rotating control rod 87 is slid downward along the radial slide of the U-shaped groove 812 to the lower axial groove to limit the positioning hook head 821 to lock the measured object in position, and then measurement can be carried out; when the measurement is completed, the rotating control rod 87 is operated by the spherical head 88 to retract the spring 84, so that the reverse tensioning positioning hook head 821 is separated from the measured object, and then the rotating control rod 87 is slid upward along the radial slide of the U-shaped groove 812 to the upper axial groove 814 to limit the position.

[0062] like Fig.11 As shown, the Y and Z direction limiting mechanism 4 includes a Y and Z direction limiting mechanism base 41, on which a spring mounting rod 44 and a YZ direction limiting block 42 are mounted, and on which an upper end positioning and pressing spring 45 and an upper end positioning and pressing spring limiting sleeve 43 are mounted. Specific implementation method 2

[0064] like Figure 4 As shown, one of the methods for using a multifunctional composite inspection fixture for automobile interior door panels as described in Specific Embodiment 1 is that when preparing to conduct a matching test between an automobile interior door panel assembly and a front sheet metal of a vehicle body, the main positioning block 5 and 10 positioning and locking mechanisms 8 of the door panel substrate are removed, the front of the automobile interior door panel assembly to be tested is aligned with the door panel iron door sheet metal profiling block 2 installed in front of the inspection fixture bottom plate 1, the buckle of the automobile interior door panel assembly is snapped into the iron door sheet metal profiling hole 18, the product is hung by the YZ direction limiting block 42 on the Y and Z direction limiting mechanism 4 and the product is pressed by the upper end positioning and pressing spring piece 45, and then the product is pressed by measuring the positioning and locking rod 7 at both ends of the Y direction positioning reference block 3, and the gap surface difference requirements between the door panel assembly parts and the door panel iron door sheet metal profiling block are detected by a special go / no-go gauge, a feeler gauge and a break gauge, so as to achieve the detection purpose of measuring the matching gap of the imitation door sheet metal. Specific implementation method 3

[0066] like Figure 5 As shown, the second method of using a multifunctional composite inspection fixture for automobile interior door panels as described in the specific embodiment 1 is that when preparing to detect the front size of the automobile interior door panel assembly, the main positioning block 5 of the door panel substrate and the door panel iron door sheet metal profiling block 2 are removed, and it can be seen that a positioning and locking mechanism mounting seat 21 is installed on the inspection fixture bottom plate 1, and the positioning and locking mechanism 8 is installed on the positioning and locking mechanism mounting seat 21, and the front of the automobile interior door panel to be tested is aligned with the positioning and locking mechanism 8 installed in front of the inspection fixture bottom plate 1, and the position of the product to be tested is adjusted so that the product to be tested can be smoothly loaded according to the positioning position on the inspection fixture, and then the product to be tested is pressed by 10 positioning and locking mechanisms 8, and the product is hung and pressed by the upper end positioning and pressing spring sheet 45 on the Y and Z direction limit mechanism 4, and then the product is pressed by measuring the positioning and locking rod 7 at both ends of the Y-direction positioning reference block 3, and the product is inspected on the surface to be inspected by three coordinates. If the tolerance is within the range, the product is qualified, otherwise it is deemed unqualified. Specific implementation method 4

[0068] like Figure 6As shown, the third method of using a multifunctional composite inspection fixture for automobile interior door panels as described in Specific Embodiment 1 is that when preparing to detect the front size of the automobile interior door panel skeleton, the Y-axis positioning reference block 3 and the door panel iron door sheet metal profiling block 2 are removed, and it can be seen that a positioning and locking mechanism mounting seat 21 is installed on the inspection fixture bottom plate 1, and the positioning and locking mechanism 8 is installed on the positioning and locking mechanism mounting seat 21, and the front of the automobile interior door panel skeleton to be tested is aligned with the positioning and locking mechanism 8 installed in front of the inspection fixture bottom plate 1, and the position of the product to be tested is adjusted so that the product to be tested can be smoothly loaded according to the positioning position on the inspection fixture, and then the product to be tested is pressed by 10 positioning and locking mechanisms 8, and then the product is pressed by the positioning and pressing springs 45 on the Y and Z direction limit mechanisms 4, and then the product is pressed by the 3 door panel assembly front pressing springs 19 on the door panel substrate main positioning block 5, and the product is detected on the surface to be detected using three coordinates. If the tolerance is within the range, the product is qualified, otherwise it is deemed unqualified. Specific implementation method 5

[0070] like Figure 7 As shown, the fourth method of using a multifunctional composite inspection fixture for automobile interior door panels as described in Specific Embodiment 1 is that when preparing to detect the back size of the automobile interior door panel frame, the back handle profiling block 13 of the door panel assembly is removed, the back of the automobile interior door panel frame to be tested is aligned and installed on the back profiling block 12 of the door panel assembly behind the inspection fixture bottom plate 1, and is positioned by three back locating pins 16 of the door panel assembly, and the door panel frame is positioned on the back locating block 14 of the door panel substrate, the product is pressed by three back pressing springs 20 of the door panel frame, and the back of the automobile interior door panel is pressed and positioned by seven back positioning pressing springs 11, and the back size of the door panel frame is measured by using three coordinates. Specific implementation method 6

[0072] like Figure 8 As shown, the fifth method of using a multifunctional composite inspection fixture for automobile interior door panels as described in Specific Embodiment 1 is that when preparing to detect the back size of the automobile interior door panel assembly, the back positioning block 14 of the door panel substrate is removed, and the back of the automobile interior door panel assembly to be tested is aligned and installed on the back profiling block 12 of the door panel assembly behind the inspection fixture bottom plate 1, and is positioned by three back positioning pins 16 of the door panel assembly, and the door panel handle is attached to the back handle profiling block 13 of the door panel assembly, and the back of the automobile interior door panel is pressed and positioned by seven back positioning and clamping springs 11, and the back size of the assembly door panel is measured by using three coordinates.

Claims

1. A multifunctional composite inspection tool for automobile interior door panels, comprising a base (15), a inspection tool bottom plate (1) connected to the base (15), and a positioning locking mechanism (8) installed on the inspection tool bottom plate (1), characterized in that: A door plate iron door sheet metal profiling block (2) is installed in front of the inspection fixture bottom plate (1), and front lugs which are integrated with the door plate iron door sheet metal profiling block (2) are respectively provided on the inner wall and the outer wall of the door plate iron door sheet metal profiling block (2), and screw holes are provided on the front lugs and door plate iron door sheet metal simulation block locking nuts (17) are installed therein, and iron door sheet metal profiling holes (18) simulating iron door sheet metal holes for engaging with door plate buckles are made on the upper surface of the door plate iron door sheet metal profiling block (2), and a positioning locking mechanism is installed in front of the inspection fixture bottom plate (1). A positioning and locking mechanism mounting seat (21) is provided on the positioning and locking mechanism mounting seat (21), and a positioning and locking mechanism (8) that can be installed in a simulated manner with a door panel is installed. A door panel base plate main positioning block (5) and a Y-direction positioning reference block (3) are installed on the inspection fixture bottom plate (1) at the middle position of the door panel iron door sheet metal profiling block (2). A measuring positioning and locking rod (7) is installed at both ends of the Y-direction positioning reference block (3). A door panel assembly front pressing spring (19) is installed on the door panel base plate main positioning block (5). Y and Z direction positioning reference blocks (3) are also installed in front of the inspection fixture bottom plate (1). A direction limiting mechanism (4) is provided, wherein a coordinate system reference hole (6) is also installed on the inspection jig bottom plate (1) and a coordinate system reference circle for establishing a measurement coordinate system is installed therein; a door panel assembly back profile block (12) and a back positioning and clamping spring sheet (11) are installed behind the inspection jig bottom plate (1); a door panel base plate Y-direction positioning column (10) is installed on the door panel assembly back profile block (12); a back lug which is integral with the door panel assembly back profile block (12) is provided on the door panel assembly back profile block (12); a door panel assembly back positioning pin (16) is installed on the back lug; a door panel assembly back handle profile block (13) and a door panel base plate back positioning block (14) are installed on the inspection jig bottom plate (1) at a middle position of the door panel assembly back profile block (12); and a door panel assembly back clamping spring sheet (20) is installed on the door panel base plate back positioning block (14).

2. The multifunctional composite inspection tool for automobile interior door panels according to claim 1 is characterized in that: Three front lugs are provided on the inner and outer sides of the door panel iron door sheet metal profiling block (2) and are integrated with the door panel iron door sheet metal profiling block (2). A screw hole is provided on each front lug and a door panel iron door sheet metal simulation block locking nut (17) is installed therein. Four simulation block handles (9) are also installed on the outer wall of the door panel iron door sheet metal profiling block (2) for facilitating the installation or removal of the door panel iron door sheet metal profiling block (2). Ten iron door sheet metal profiling holes (18) simulating iron door sheet metal holes are made on the upper surface of the door panel iron door sheet metal profiling block (2).

3. The multifunctional composite inspection fixture for automobile interior door panels according to claim 1 is characterized in that: Ten door panel base plate Y-direction positioning columns (10) are installed around the back profiling block (12) of the door panel assembly, three back protrusions which are integrated with the back profiling block (12) of the door panel assembly are provided at the bottom and lower left corner of the back profiling block (12) of the door panel assembly, and a back positioning pin (16) of the door panel assembly is installed on each back protrusion, and seven back positioning and clamping springs (11) are installed at the rear of the inspection fixture bottom plate (1).

4. The multifunctional composite inspection tool for automobile interior door panels according to claim 1 is characterized in that: The positioning locking mechanism (8) comprises a T-shaped hook sleeve (81), a positioning seat (811) is provided at the right end of the T-shaped hook sleeve (81), an axial pin hole (813) for connecting with the inspection tool base plate (1) is processed on the positioning seat (811), a through axial through hole (815) is processed at the center of the T-shaped hook sleeve (81), and a U-shaped groove (812) is processed at the axial middle position of the cylindrical sleeve at the left end of the T-shaped hook sleeve (81). The U-shaped groove (81 2) is perpendicular to the axis to form a radial slideway, and the two ends of the U-shaped groove (812) form two axial limit grooves parallel to the axis. A rotary switch control rod (87) is installed in the U-shaped groove (812) of the T-shaped hook sleeve (81), a left groove (814) is processed at the left end of the T-shaped hook sleeve (81), and a right groove (816) is processed at the right end of the T-shaped hook sleeve (81). The axial through hole (815) of the T-shaped hook sleeve (81) is installed A reverse tensioning positioning hook (82) is provided, wherein a positioning hook head (821) is provided at the left end of the reverse tensioning positioning hook (82), a positioning shoulder (822) for limiting a limiting nut (86) is provided at the right end of the reverse tensioning positioning hook (82), a positioning groove (823) cooperating with a rotary switch control rod (87) is provided in the middle of the reverse tensioning positioning hook (82), a hook sleeve (83) is installed in the left groove (814) of the T-shaped hook sleeve (81), a spring (84) is installed in the right groove (816) of the T-shaped hook sleeve (81), a spring seat (85) and a limiting nut (86) are installed on the reverse tensioning positioning hook (82) at the right end of the spring (84), the rotary switch control rod (87) is simultaneously inserted into the positioning groove (823) of the reverse tensioning positioning hook (82), and a spherical head (88) for facilitating manual operation is installed on the rotary switch control rod (87).

5. The method for using a multifunctional composite inspection tool for automobile interior door panels according to claim 1, 2, 3 or 4, characterized in that: When preparing to test the matching between the automobile interior door panel assembly and the front sheet metal of the vehicle body, the main positioning block (5) and the positioning locking mechanism (8) of the door panel base plate are removed, and the front of the automobile interior door panel assembly to be tested is aligned and mounted on the door panel iron door sheet metal profiling block (2) in front of the inspection fixture bottom plate (1). The buckle of the automobile interior door panel assembly is snapped into the iron door sheet metal profiling hole (18), and the product is hung and pressed by the Y and Z direction limit mechanisms (4). Then, the positioning locking rod (7) is measured at both ends of the Y direction positioning reference block (3) to press the product, and the gap surface difference requirements between the door panel assembly parts and the door panel iron door sheet metal profiling block are tested by a special go / no-go gauge, feeler gauge and cross gauge.

6. The method for using a multifunctional composite inspection tool for automobile interior door panels according to claim 1, 2, 3 or 4, characterized in that: When preparing to inspect the front dimensions of the automobile interior door panel assembly, the door panel base plate main positioning block (5) and the door panel iron door sheet metal profiling block (2) are removed, and the front of the automobile interior door panel to be inspected is aligned and mounted on the positioning locking mechanism (8) in front of the inspection fixture bottom plate (1). The position of the product to be inspected is adjusted so that the product to be inspected can be smoothly loaded according to the positioning position on the inspection fixture. The product to be inspected is then pressed by the positioning locking mechanism (8), and the product is hung and pressed by the Y and Z direction limit mechanisms (4). The product is then pressed by measuring the positioning locking rods (7) at both ends of the Y direction positioning reference block (3). The product is inspected on the surface to be inspected using three coordinates. If the tolerance is within the range, the product is qualified, otherwise it is considered unqualified.

7. The method for using a multifunctional composite inspection tool for automobile interior door panels according to claim 1, 2, 3 or 4, characterized in that: When preparing to inspect the front dimensions of the automobile interior door panel frame, the Y-axis positioning reference block (3) and the door panel iron door sheet metal profiling block (2) are removed, and the front face of the automobile interior door panel frame to be inspected is aligned and mounted on the positioning locking mechanism (8) in front of the inspection fixture bottom plate (1). The position of the product to be inspected is adjusted so that the product to be inspected can be smoothly loaded according to the positioning position on the inspection fixture. The product to be inspected is then pressed by the positioning locking mechanism (8), and then the product is pressed by the Y and Z direction limit mechanisms (4). The product to be inspected is then pressed by the front face pressing spring (19) of the door panel assembly on the main positioning block (5) of the door panel base plate. The product is inspected on the surface to be inspected using three coordinates. If the tolerance is within the range, the product is qualified. Otherwise, it is considered unqualified.

8. The method for using a multifunctional composite inspection tool for automobile interior door panels according to claim 1, 2, 3 or 4, characterized in that: When preparing to inspect the back dimensions of the automobile interior door panel frame, the handle profiling block (13) on the back of the door panel assembly is removed, the back of the automobile interior door panel frame to be inspected is aligned and mounted on the back profiling block (12) of the door panel assembly behind the bottom plate (1) of the inspection fixture, and the back of the door panel frame is positioned by the back positioning pin (16) of the door panel assembly, and the door panel frame is positioned on the back positioning block (14) of the door panel base plate, the product to be inspected is pressed by the back pressing spring sheet (20) of the door panel frame, and the back of the automobile interior door panel frame is pressed and positioned by the back positioning pressing spring sheet (11), and the back dimensions of the door panel frame are measured by using three-coordinate measurement.

9. The method for using a multifunctional composite inspection tool for automobile interior door panels according to claim 1, 2, 3 or 4, characterized in that: When preparing to inspect the back dimensions of the automobile interior door panel assembly, the back positioning block (14) of the door panel base plate is removed, the back of the automobile interior door panel assembly to be inspected is aligned and mounted on the back profiling block (12) of the door panel assembly behind the bottom plate (1) of the inspection fixture, and the door panel assembly is positioned by the back positioning pin (16), and the door panel handle is attached to the back handle profiling block (13) of the door panel assembly, and the back of the automobile interior door panel is pressed and positioned by the back positioning and pressing spring (11), and the back dimensions of the assembly door panel are measured by using three-coordinate measurement.

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