Rear seat cover plate detection device

Abstract

The utility model provides a rear seat cover plate detection device, which comprises a detection device, the detection device comprises a rack, a positioning mechanism, a quick clamping mechanism and a detection appliance, the rack comprises a base, a reference surface, a reference hole and a detection piece placement seat, and the upper surface of the base is a platform with a cuboid structure. X-direction coordinate lines and Y-direction coordinate lines in an RPS coordinate system are engraved in the longitudinal and transverse directions of the platform, and three reference surfaces and reference holes are formed in three corners of the platform respectively; the number of the detection piece installation seats is seven, the detection piece installation seats respectively comprise a go-no go gauge installation seat, two positioning pin installation seats, three detection pin installation seats and a flush gauge installation seat, the go-no go gauge installation seat is located right in front of the X-direction coordinate line of the platform, the two positioning pin installation seats are located on the two sides of the Y-direction coordinate line of the platform respectively, and the three detection pin installation seats are located right in front of the Y-direction coordinate line of the platform. And the three detection pin mounting seats are respectively a mounting via hole detection pin mounting seat positioned right in front of the X-direction coordinate line of the platform and a mounting hole detection pin mounting seat positioned on the rear side of the X-direction coordinate line of the platform.

Description

Technical Field

[0001] The utility model relates to the field of stamping part manufacturing measurement, in particular to a rear seat cover plate detection device. Background Art

[0002] The rear seat cover is located at the upper end of the battery compartment below the rear seat of the electric vehicle. In addition to the battery, there are many electrical control modules in the battery compartment. After installing the battery and related modules, fit the mounting surface of the side of the rear seat cover with the rubber strip to the mounting surface of the upper end of the battery compartment, and ensure that the rectangular mounting holes of the harness sheaths on both sides match correctly, and then fix it with several mounting screws. The rear seat cover acts as a door cover. After closing, it can be opened again by unscrewing the screws. On the one hand, it can ensure that the batteries and modules in the battery compartment will not be damaged by other unexpected factors, and on the other hand, it is convenient for the maintenance and replacement of the battery and control module. In order to ensure that the rear seat cover is correctly matched and installed with the battery compartment, the rear seat cover drawing has corresponding requirements for the surface contour of the installation matching surface and the position and size of each installation hole. The rear seat cover is made of 0.7 mm thick galvanized sheet through drawing, trimming, punching and shaping. Therefore, in the production process of the rear seat cover of the car, the surface contour of the installation matching surface and the position and size of each installation hole must be controlled by the "three inspections" inspection method of the first piece, patrol inspection and last piece. At present, the detection of the surface contour of the rear seat cover installation matching surface and the position and size of each installation hole can be carried out through the three-coordinate detection in the laboratory. Although the three-coordinate detection has high detection accuracy, it takes a long time to detect and must be placed in a constant temperature laboratory. This cannot meet the "three-inspection system" requirements in the production process, and the detection accuracy cannot be achieved using general conventional measuring tools. In order to ensure the quality control of the rear seat cover in the manufacturing process and improve the work efficiency of workers, it is necessary to design and manufacture a rear seat cover detection device. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a rear seat cover detection device to solve at least one of the above technical problems.

[0004] The technical solution of the utility model is: a rear seat cover plate detection device, comprising a detection device, characterized in that the detection device comprises a stand, a positioning mechanism, a quick clamping mechanism and a detection device, the stand comprises a base, a reference surface, a reference hole and a detection piece placement seat, the upper surface of the base is a platform with a rectangular structure, the vertical and horizontal directions of the platform are engraved with X-direction coordinate lines and Y-direction coordinate lines in the RPS coordinate system, and three reference surfaces and reference holes are respectively provided on the three corners of the platform;

[0005] There are seven detection piece mounting seats, and the detection piece mounting seats respectively include a go / no-go gauge mounting seat, two positioning pin mounting seats, three detection pin mounting seats and a flush gauge mounting seat. The go / no-go gauge mounting seat is located directly in front of the X-axis coordinate line of the platform, and the two positioning pin mounting seats are respectively located on both sides of the Y-axis coordinate line of the platform, and the three detection pin mounting seats are respectively a mounting through-hole detection pin mounting seat located directly in front of the X-axis coordinate line of the platform, a mounting hole detection pin mounting seat located on the rear side of the X-axis coordinate line of the platform, and a rectangular mounting hole detection pin mounting seat;

[0006] The positioning mechanism includes a mold seat, the upper surface of which is provided with a go / no-go gauge detection reference surface and a flush gauge detection reference surface, and five Z-direction positioning blocks are provided on the mold seat. The Z-direction positioning blocks are fixed to the corresponding positions of the mold seat by screws through the coordinate values ​​of the five RPS positioning points on the rear seat cover mounting matching surface, thereby determining the five RPS positioning points in the Z direction of the rear seat cover, namely A1, A2, A3, A4 and A5, and the small planes formed by each of the five RPS positioning points are the Z-direction positioning surfaces that limit the three degrees of freedom of Z-direction movement, rotation around the X-axis, and rotation around the Y-axis.

[0007] Further preferably, the base is made of aluminum alloy after casting and precision machining, four feet are evenly distributed under the four corners of the base, and four handles are fixed at both ends of the long side of the base by screws. The platform is used for subsequent installation, commissioning and calibration of the detection device. The bottom corners are used to support the entire detection device, and the handles are used for manual transportation of the detection device.

[0008] Further preferably, the reference surface and the reference hole are embedded in the platform through a stepped sleeve, the small outer circle of the stepped sleeve is interference fit with the hole on the platform, and the stepped sleeve is covered with a protective cover. The upper end surface of the stepped sleeve is the reference surface, and the inner hole is the reference hole. The coordinate values ​​of the reference surface and the reference hole directly intercept the coordinate coefficient value of the vehicle body, and a coordinate value nameplate is installed next to the reference. The reference surface and the reference hole are intended to be accurately and quickly fixed on the machine tool or measuring machine table during processing or measurement using three coordinates. In order to protect the reference surface and the reference hole, protective covers are added to the three stepped sleeves.

[0009] Further preferably, the mold seat is fixed on the platform by screws and positioning pins, and the mold seat is made of aluminum casting. The mold seat concave body is directly made on the CNC machine tool by CAD / CAM means completely according to the rear seat cover plate outer curved surface body, including the simultaneous milling of various detection surfaces.

[0010] Further preferably, the go / no-go gauge detection reference surface is the detection reference surface for the profile of the mounting matching surface, and the flush gauge detection reference surface is the detection reference surface for the profile of the trimming line. The mounting matching surface profile detection reference surface is the detection reference for detecting the profile of the rear seat cover mounting matching surface (twill shadow surface), and the trimming line profile detection reference surface is used to detect the detection reference for all peripheral trimming line profiles (grid shadow surface).

[0011] Further preferably, the height of the Z-direction positioning block is 5 mm, and its value determines the size of the go / no-go gauge for installing the matching surface inspection.

[0012] Further preferably, the positioning mechanism also includes positioning pin reference holes, which are RPS1 positioning pin reference holes and RPS2 positioning pin reference holes, respectively. The RPS1 positioning pin reference holes and the RPS2 positioning pin reference holes are respectively arranged on both sides of the Y-axis coordinate line of the mold seat, and the positions of the RPS1 positioning pin reference holes and the RPS2 positioning pin reference holes match the coordinate positions of the rear seat cover reference B and reference C.

[0013] The RPS1 reference hole corresponds to the rear seat cover reference B, and matching the RPS1 locating pin can limit two degrees of freedom of movement in the X direction and the Y direction. The RPS2 reference hole corresponds to the rear seat cover reference C, and matching the RPS2 locating pin can limit one degree of freedom of rotation around the Z axis. In this way, the positioning reference of this detection device is consistent with the requirements of the drawing. This positioning method using 5 RPS positioning points on 5 positioning blocks, two locating pin reference holes and two locating pins can completely limit six degrees of freedom. In this way, the rear seat cover is placed on this detection device, and the positioning is accurate and reliable, ensuring the accuracy and stability of the detection.

[0014] Further preferably, the reference hole of the positioning pin adopts a sleeve structure to prevent the reference hole from being worn, thereby extending the service life of the detection device and facilitating subsequent calibration and maintenance.

[0015] Further preferably, the positioning mechanism also includes a detection pin reference hole, which includes four mounting hole detection pin reference holes, four mounting through-hole detection pin reference holes and two rectangular mounting hole detection pin reference holes, the four mounting hole detection pin reference holes are located on the rear side of the X-axis coordinate line of the body seat, the mounting through-hole detection pin reference holes are located on the front side of the X-axis coordinate line of the body seat, the rectangular mounting hole detection pin reference holes are located on two symmetrical sides of the rear side of the X-axis coordinate line of the body seat, the opening positions of the detection pin reference holes are consistent with the RPS coordinate values ​​of the four mounting holes, four mounting through-holes and two rectangular mounting holes corresponding to the rear seat cover, and the shape and size of the detection pin reference holes are matched with the corresponding detection pins, the rectangular mounting hole detection pin reference holes are chamfered holes, and the other detection pin reference holes are round holes.

[0016] Further preferably, the reference holes of the detection pins all adopt a sleeve structure, which is also to prevent the reference holes from being worn, extend the service life of the detection device, and facilitate subsequent calibration and maintenance.

[0017] Further preferably, five quick clamping mechanisms are respectively provided on the front and rear sides of the mold base, each quick clamping mechanism includes a quick clamping base, a quick clamp and a quick clamping plate, the quick clamping base is fixed to the platform by screws, the quick clamp is fixed to the upper end of the quick clamping base, the quick clamping plate and the quick clamp are connected to the quick clamp by quick clamp connecting screws, a U-shaped opening is provided at the head of the quick clamping plate, and the clamping point of each quick clamping plate is exactly on the small plane formed by the positioning points of the five positioning blocks.

[0018] The U-shaped opening is used to avoid the interference of the positioning pin or the detection pin. The quick clamp mechanism plays the role of pressing the rear seat cover so that the position of the rear seat cover will not be offset during the detection process, ensuring the accuracy and precision of the detection. Among them, the quick clamp is a universal hardware part with many specifications to choose from. It is widely used in the production of mold inspection fixtures. It is based on the dead point clamping principle in the mechanics of the double rocker structure in the planar four-bar mechanism to achieve clamping and self-locking. It has the characteristics of easy installation, convenient loading and unloading, stable clamping force, and high work efficiency. The head shape of each quick clamp pressure plate is designed and manufactured in combination with the requirements of the clamping force point position. When the quick clamp handle is in a horizontal position, it is the quick clamp mechanism loose position. When the quick clamp handle is in a vertical position, it is the quick clamp mechanism clamping position.

[0019] Further preferably, the detection instrument includes an RPS locating pin, a detection pin, a go / no-go gauge and a flush gauge. There are two RPS locating pins, namely, an RPS1 locating pin and an RPS2 locating pin. There are three detection pins, namely, a mounting through-hole detection pin, a mounting hole detection pin and a rectangular mounting hole detection pin. The lower end of the rectangular mounting hole detection pin is a chamfered cylinder, and the lower end of the rectangular mounting hole detection pin matches the chamfered reference hole of the rectangular mounting hole detection pin on the body seat. There is one go / no-go gauge, the go gauge size of the go / no-go gauge is φ4.5, and the no-go gauge size is φ5.5. A 145° cylinder is formed between the go gauge and the no-go gauge at both ends of the go / no-go gauge. There is one flush gauge, the go and no-go ends of the flush gauge are L-shaped, and the L-shaped long side of the flush gauge fits the flush gauge detection reference surface. The concave end of the flush gauge is the go end, and the convex end of the flush gauge is the no-go end. The depth of the concave end is 1.5, and the height of the convex end is 1.5.

[0020] The RPS locating pin is used for positioning and testing of parts. When not in use, it is placed on the locating pin installation seat. When the rear seat cover is placed, the RPS1 locating pin is inserted into the RPS1 locating pin reference hole on the body seat, and the RPS2 locating pin is inserted into the RPS2 locating pin reference hole on the body seat. On the one hand, it plays the role of positioning the rear seat cover RPS, and on the other hand, it is also used to detect the position and size of the RPS1 locating hole and the RPS2 locating hole on the rear seat cover. The two locating holes on the rear seat cover are also mounting bolt holes. If they can be inserted normally, the hole position is determined to be qualified, otherwise it is unqualified. The detection pin is used to detect the position and size of 4 mounting holes, 4 mounting holes and 2 rectangular mounting holes. When the rear seat cover is placed, positioned and pressed, as long as the detection pin is inserted into the corresponding detection pin reference hole on the body seat, it can be determined whether the position and size of the corresponding hole of the rear seat cover are qualified. The go and no-go gauge is used to detect the contour of the installation matching surface of the rear seat cover and the contour of the end surface of the two rectangular mounting holes. When not in use, it is placed on the go and no-go gauge installation seat. Since the clearance of the reference surface of the go and no-go gauge, i.e. the height of the five positioning blocks, is a standard value of 5 mm, and the installation matching surface profile on the drawing is 1.0, i.e. the tolerance is ±0.5, this determines that the go gauge size is φ4.5 and the no-go gauge size is φ5.5. In order to facilitate the insertion of the go and no-go gauge into the gap between the installation surface and the detection surface, an inclined cylinder is added. The flush gauge is used to detect the contour of all peripheral trimming lines of the rear seat cover. When not in use, it is placed on the flush gauge mounting seat. During detection, the concave end is the through end and the convex end is the stop end. The flush gauge detection surface on the body, i.e. the trimming line profile detection reference surface, is on the same plane as the trimming line of the rear seat cover to be detected. Combined with the contour of all trimming lines on the drawing, i.e. the tolerance is ±1.5, this determines the size of the flush gauge.

[0021] Further preferably, the rectangular boss at the lower end of the rectangular mounting hole detection pin and the contoured surfaces of the lower end surfaces of the corresponding two rectangular mounting holes on the body seat constitute an auxiliary reference mechanism.

[0022] The mounting matching surfaces on the outer sides of the two rectangular mounting holes on the left and right sides of the rear seat cover are located at the bottom of the inner concave surface, so that the profiling surfaces of the corresponding two rectangular mounting holes on the body seat are also the bottom of the concave surface. In this way, according to a similar method for detecting the profile of the mounting matching surface, the go / no-go gauge cannot contact the detection surface, i.e., the lower end faces of the two rectangular mounting holes, and thus cannot detect the surface profile of the two rectangular mounting holes. The auxiliary reference mechanism added in the utility model is used to cooperate with the go / no-go gauge to detect the surface profile of the two rectangular mounting holes. The rear seat cover is gently placed on the concave profiling body of the body seat according to the positioning requirements on the body seat. After positioning and pressing, the detection pin of the rectangular mounting hole is inserted into the detection pin reference hole of the corresponding rectangular mounting hole on one side of the body seat, and the lower end face of the rectangular boss is fitted with the profiling surface of the corresponding rectangular mounting hole end face on the body seat. At this time, the rectangular mounting hole The stepped surface on the rectangular boss of the detection pin is located at the upper end of the rectangular mounting hole of the rear seat cover. This stepped surface on the rectangular boss is the auxiliary reference surface. Since the surface profile of the end face of the rectangular mounting hole of the rear seat cover is the same as the surface profile tolerance of the mounting matching surface, both are ±0.5, in order to share a through and no-go gauge, according to the thickness of the part of 0.7, the height of the lower end face of the rectangular mounting hole of the rear seat cover and the corresponding rectangular mounting hole end face profiling surface on the body seat is 5, and the height of the upper end face of the rectangular mounting hole of the rear seat cover and the stepped surface on the rectangular boss, i.e., the auxiliary reference surface, is also 5. The height of the rectangular boss is designed to be 10.7. At this time, a through and no-go gauge is inserted between the upper end face of the rectangular mounting hole of the rear seat cover and the stepped surface on the rectangular boss, i.e., the auxiliary reference surface. If the through gauge is through and the no-go gauge is not, the surface profile of the end face of the rectangular mounting hole is qualified. On the contrary, if the through gauge is not or the no-go gauge is through, the rear seat cover is unqualified. Similarly, the surface profile of the end face of the rectangular mounting hole of the rear seat cover on the other side can be tested.

[0023] Further preferably, all locating pin reference hole sleeves, detection pin reference hole sleeves, locating pins, detection pins, go and no-go gauges and flush gauges are made of Cr12MoV cold working die steel material, and are quenched heat treated to HRC52-60 and hard chrome plated on the surface. In this way, these parts are wear-resistant and have no deformation, making the detection accuracy of the detection device stable and the service life long.

[0024] The detection device of the utility model has a compact structure, ingenious design and easy operation. The device can be moved and placed at the production site. During the production and manufacturing process of the rear seat cover, it can quickly and accurately determine whether the contour of the installation matching surface and the position size of each hole meet the requirements of the drawing, and fully meet the requirements of the "three-inspection system" for quality control in the manufacturing process of the rear seat cover, thereby improving work efficiency and reducing production costs.

[0025] During the inspection, the quick clamp handles on the 5 quick clamp mechanisms are in a horizontal position, so that the 5 quick clamp mechanisms are in a loose state, and the rear seat cover is gently placed on the concave contoured body of the body seat according to the positioning requirements on the body seat. At this time, the 5 RPS positioning points on the mounting surface of the rear seat cover are respectively fitted to the 5 Z-direction positioning points on the 5 positioning blocks on the body seat, that is, limiting the three degrees of freedom of Z-direction movement, rotation around the X-axis, and rotation around the Y-axis. Insert the RPS1 locating pin through the B reference locating hole of the rear seat cover into the RPS1 locating pin reference hole on the body seat, that is, limit the two degrees of freedom of movement in the X direction and the Y direction, and then insert the RPS2 locating pin through the C reference locating hole of the rear seat cover into the RPS2 locating pin reference hole on the body seat, that is, limit the rotation around the Z axis by one degree of freedom. In this process, if one of the RPS1 and RPS2 locating pins cannot be smoothly inserted into the corresponding hole, interference will occur, and the rear seat cover will be judged to be unqualified, and the test will end. If there is no interference, it can be judged that the position and size of the two RPS holes of the rear seat cover are qualified, that is, the B reference hole and C reference hole positions on the installation surface of the rear seat cover are qualified. Then put the quick clamp handles on the 5 quick clamp mechanisms in a vertical position, and the 5 quick clamp mechanisms are in a clamping state, thus completing the positioning and clamping of the rear seat cover, ensuring that the rear seat cover is well positioned and will not shake.

[0026] At this time, the contour of the installation matching surface of the rear seat cover is tested with a through gauge, and the contour of the cutting edge line is tested with a flush gauge. If the through gauge is passed and the no-go gauge is stopped, it can be determined that the contour of the installation matching surface or the cutting edge line is qualified. Otherwise, if the through gauge is stopped or the no-go gauge is passed, it can be determined that the contour of the installation matching surface or the cutting edge line is unqualified.

[0027] The hole position detection uses a detection pin. If the detection pin can pass through the corresponding hole of the rear seat cover and smoothly insert into the corresponding detection pin reference hole on the body seat, it is qualified. Otherwise, it is unqualified. In the specific detection, the installation hole detection pin, installation hole detection pin, and rectangular installation hole detection pin are used to detect the position and size of 4 installation holes, 4 installation holes, and 2 rectangular installation holes.

[0028] Insert the rectangular mounting hole detection pin through the rectangular mounting hole of the rear seat cover into the corresponding reference hole of the profile seat, and make the lower end face of the rectangular boss fit with the corresponding rectangular mounting hole end face profiling surface on the profile seat. At this time, insert the through and stop gauge between the upper end face of the rectangular mounting hole of the rear seat cover and the upper step surface of the rectangular boss, i.e. the auxiliary reference surface. If the through gauge is through and the stop gauge is not, the surface profile of the rectangular mounting hole end face is qualified. On the contrary, if the through gauge is not or the stop gauge is through, it is unqualified. Similarly, the surface profile of the rectangular mounting hole end face of the rear seat cover on the other side can be tested.

[0029] After the inspection is completed, place all the inspection pins, go / no-go gauges and flush gauges on their respective seats, repeat the action of opening all quick-clamp mechanisms at the beginning of the inspection, and carefully remove the rear seat cover. This will quickly complete the inspection and determination of the contour of the rear seat cover installation matching surface, the contour of the trimming line and the position and size of each hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional schematic diagram of the rear seat cover detection device opened without the parts placed;

[0031] Figure 2 It is a three-dimensional schematic diagram of the rear seat cover detection device placing parts and pressing them;

[0032] Figure 3 It is a partial three-dimensional schematic diagram of the rear seat cover detection device for placing parts and pressing them;

[0033] Figure 4 It is a three-dimensional schematic diagram of a rectangular detection pin;

[0034] Figure 5 It is a partial cross-sectional schematic diagram of a rectangular detection pin inserted without a placed part;

[0035] Figure 6 It is a partial cross-sectional diagram of the rectangular detection pin inserted after the part is placed.

[0036] Figure 7 This is a schematic diagram of the rear seat cover.

[0037] In the figure: 1, rear seat cover; 2, stand; 21, base; 22, foot; 23, handle; 24, reference surface; 25, reference hole; 211, platform; 212, X-axis coordinate line; 213, Y-axis coordinate line; 26, go / no-go gauge seat; 27, locating pin seat; 28, detection pin seat; 29, flush gauge seat; 30, body seat; 31, RPS1 locating pin reference hole; 32, RPS2 locating pin reference hole; 33, Z-axis locating block; 34, mounting hole detection pin reference hole; 35, mounting hole Detection pin reference hole; 36, rectangular mounting hole detection pin reference hole; 37, go / no-go gauge detection reference surface; 38, flush gauge detection reference surface; 41, quick clamp base; 42, quick clamp; 43, quick clamp clamping plate; 51, RPS1 locating pin; 52, RPS2 locating pin; 53, mounting hole detection pin; 54, mounting through-hole detection pin; 55, rectangular mounting hole detection pin; 551, chamfered cylinder; 552, rectangular boss; 553, lower end surface of rectangular boss; 554, auxiliary reference surface; 56, go / no-go gauge; 57, flush gauge. DETAILED DESCRIPTION

[0038] The utility model is further described below in conjunction with the accompanying drawings.

[0039] like Figure 1-Figure 7 As shown, a rear seat cover detection device includes a detection device, the detection device includes a stand 2, a positioning mechanism, a quick clamping mechanism and a detection device, the stand includes a base 21, a reference surface 24, a reference hole 25 and a detection piece placement seat, the upper surface of the base is a rectangular platform 211, the vertical and horizontal directions of the platform are engraved with X-axis coordinate lines 212 and Y-axis coordinate lines 213 in the RPS coordinate system, and three reference surfaces and reference holes are respectively provided at the three corners of the platform; there are seven detection piece placement seats, and the detection piece placement seats respectively include a go / no-go gauge placement seat 26, two positioning pin placement seats 27, three detection pin placement seats 28 and a flush gauge placement seat 29, a go / no-go gauge placement seat 29, and a go / no-go gauge placement seat 210. The gauge mounting seat is located in front of the X-axis coordinate line of the platform, the two positioning pin mounting seats are respectively located on both sides of the Y-axis coordinate line of the platform, and the three detection pin mounting seats are respectively a mounting through-hole detection pin mounting seat located in front of the X-axis coordinate line of the platform, a mounting hole detection pin mounting seat located on the rear side of the X-axis coordinate line of the platform, and a rectangular mounting hole detection pin mounting seat; the positioning mechanism includes a mold seat 30, the upper surface of the mold seat is provided with a through-and-no-go gauge detection reference surface 37 and a flush gauge detection reference surface 38, and the mold seat is provided with five Z-axis positioning blocks 33, and the Z-axis positioning blocks are fixed to the corresponding positions of the mold seat with screws through the coordinate values ​​of the 5 RPS positioning points on the mounting matching surface of the rear seat cover.

[0040] The rear seat cover has five RPS positioning points in the Z direction, namely A1, A2, A3, A4 and A5. The small planes formed by these five RPS positioning points are the limited Z-direction positioning surfaces, that is, the three degrees of freedom of movement in the Z direction, rotation around the X axis, and rotation around the Y axis. The two RPS holes, namely the B reference hole and the C reference hole, the four mounting holes K, the four mounting holes H and the two rectangular mounting holes all have position requirements. The profile tolerance of the mounting matching surface (twill shadow surface) and the end face of the rectangular mounting hole (dotted twill shadow surface) is ±0.5, the profile tolerance of all trimming lines is ±1.5, and the material thickness is 0.7.

[0041] Further preferably, the base is made of aluminum alloy after being cast and then precisely processed, four feet 22 are evenly distributed under the four corners of the base, and four handles 23 are fixed at both ends of the long side of the base by screws. The platform is used for subsequent installation, commissioning and calibration of the detection device. The bottom corners are used to support the entire detection device, and the handles are used for manual transportation of the detection device.

[0042] Further preferably, the reference surface and the reference hole are embedded in the platform through a stepped sleeve, the small outer circle of the stepped sleeve is interference fit with the hole on the platform, and the stepped sleeve is covered with a protective cover. The upper end surface of the stepped sleeve is the reference surface, and the inner hole is the reference hole. The coordinate values ​​of the reference surface and the reference hole directly intercept the coordinate coefficient value of the vehicle body, and a coordinate value nameplate is installed next to the reference. The reference surface and the reference hole are intended to be accurately and quickly fixed on the machine tool or measuring machine table during processing or measurement using three coordinates. In order to protect the reference surface and the reference hole, protective covers are added to the three stepped sleeves.

[0043] Further preferably, the body seat is fixed on the platform by screws and positioning pins, and the body seat is made of aluminum casting. The concave body of the body seat is directly made on the CNC machine tool by CAD / CAM means in full accordance with the rear seat cover plate outer curved surface body, including the simultaneous milling of various detection surfaces.

[0044] Further preferably, the detection reference surface of the go / no-go gauge is the detection reference surface of the installation matching surface profile, and the detection reference surface of the flush gauge is the detection reference surface of the trimming line profile. The detection reference surface of the installation matching surface profile is the detection reference (twill shadow surface) for detecting the profile of the rear seat cover installation matching surface, and the trimming line profile detection reference surface is used to detect the detection reference (grid shadow surface) of all peripheral trimming line profiles.

[0045] Further preferably, the height of the Z-axis positioning block is 5 mm, which determines the size of the go / no-go gauge for installing the matching surface detection.

[0046] Further preferably, the positioning mechanism also includes positioning pin reference holes, which are RPS1 positioning pin reference hole 31 and RPS2 positioning pin reference hole 32, respectively. The RPS1 positioning pin reference hole and the RPS2 positioning pin reference hole are respectively arranged on both sides of the Y-axis coordinate line of the mold seat, and the positions of the RPS1 positioning pin reference hole and the RPS2 positioning pin reference hole match the coordinate positions of the rear seat cover reference B and reference C.

[0047] The RPS1 reference hole corresponds to the rear seat cover reference B, and matching the RPS1 locating pin can limit two degrees of freedom of movement in the X direction and the Y direction. The RPS2 reference hole corresponds to the rear seat cover reference C, and matching the RPS2 locating pin can limit one degree of freedom of rotation around the Z axis. In this way, the positioning reference of this detection device is consistent with the requirements of the drawing. This positioning method using 5 RPS positioning points on 5 positioning blocks, two locating pin reference holes and two locating pins can completely limit six degrees of freedom. In this way, the rear seat cover is placed on this detection device, and the positioning is accurate and reliable, ensuring the accuracy and stability of the detection.

[0048] Further preferably, the reference hole of the positioning pin adopts a sleeve structure to prevent the reference hole from being worn, extend the service life of the detection device and facilitate subsequent calibration and maintenance.

[0049] Further preferably, the positioning mechanism also includes detection pin reference holes, the detection pin reference holes include four mounting hole detection pin reference holes 34, four mounting through-hole detection pin reference holes 35 and two rectangular mounting hole detection pin reference holes 36, the four mounting hole detection pin reference holes are located on the rear side of the X-axis coordinate line of the body seat, the mounting through-hole detection pin reference holes are located on the front side of the X-axis coordinate line of the body seat, the rectangular mounting hole detection pin reference holes are located on two symmetrical sides of the rear side of the X-axis coordinate line of the body seat, the opening positions of the detection pin reference holes are consistent with the RPS coordinate values ​​of the four mounting holes, four mounting through-holes and two rectangular mounting holes corresponding to the rear seat cover, and the shape and size of the detection pin reference holes are matched with the corresponding detection pins, the rectangular mounting hole detection pin reference holes are chamfered holes, and the other detection pin reference holes are round holes.

[0050] Further preferably, the reference holes of the detection pins all adopt a sleeve structure, which is also to prevent the reference holes from being worn, extend the service life of the detection device, and facilitate subsequent calibration and maintenance.

[0051] Further preferably, five quick clamping mechanisms are respectively provided on the front and rear sides of the mold base, each quick clamping mechanism includes a quick clamping base 41, a quick clamp 42 and a quick clamping plate 43, the quick clamping base is fixed to the platform by screws, the quick clamp is fixed to the upper end of the quick clamping base, the quick clamping plate and the quick clamp are connected to the quick clamp by quick clamp connecting screws, a U-shaped opening is provided on the head of the quick clamping plate, and the clamping point of each quick clamping plate is exactly on the small plane formed by the positioning points of the five positioning blocks.

[0052] The U-shaped opening is used to avoid the interference of the positioning pin or the detection pin. The quick clamp mechanism plays the role of pressing the rear seat cover so that the position of the rear seat cover will not be offset during the detection process, ensuring the accuracy and precision of the detection. Among them, the quick clamp is a universal hardware part with many specifications to choose from. It is widely used in the production of mold inspection fixtures. It is based on the dead point clamping principle in the mechanics of the double rocker structure in the planar four-bar mechanism to achieve clamping and self-locking. It has the characteristics of easy installation, convenient loading and unloading, stable clamping force, and high work efficiency. The head shape of each quick clamp pressure plate is designed and manufactured in combination with the requirements of the clamping force point position. When the quick clamp handle is in a horizontal position, it is the quick clamp mechanism loose position. When the quick clamp handle is in a vertical position, it is the quick clamp mechanism clamping position.

[0053] Further preferably, the detection instrument includes an RPS locating pin, a detection pin, a go / no-go gauge 56 and a flush gauge 57. There are two RPS locating pins, namely, an RPS1 locating pin 51 and an RPS2 locating pin 52. There are three detection pins, namely, an installation through-hole detection pin 54, a mounting hole detection pin 53 and a rectangular mounting hole detection pin 55. The lower end of the rectangular mounting hole detection pin is a chamfered cylinder 551, and the lower end of the rectangular mounting hole detection pin matches the chamfered reference hole of the rectangular mounting hole detection pin on the body seat. There is one go / no-go gauge, the go gauge size of the go / no-go gauge is φ4.5, the no-go gauge size is φ5.5, and a 145° cylinder is formed between the go gauge and the no-go gauge at both ends of the go / no-go gauge. There is one flush gauge, the go and no-go ends of the flush gauge are L-shaped, and the L-shaped long side of the flush gauge fits the flush gauge detection reference surface, the concave end of the flush gauge is the go end, and the convex end of the flush gauge is the no-go end. The depth of the concave end is 1.5, and the height of the convex end is 1.5.

[0054] The RPS locating pin is used for positioning and testing of parts. When not in use, it is placed on the locating pin installation seat. When the rear seat cover is placed, the RPS1 locating pin is inserted into the RPS1 locating pin reference hole on the body seat, and the RPS2 locating pin is inserted into the RPS2 locating pin reference hole on the body seat. On the one hand, it plays the role of positioning the rear seat cover RPS, and on the other hand, it is also used to detect the position and size of the RPS1 locating hole and the RPS2 locating hole on the rear seat cover. The two locating holes on the rear seat cover are also mounting bolt holes. If they can be inserted normally, the hole position is determined to be qualified, otherwise it is unqualified. The detection pin is used to detect the position and size of 4 mounting holes, 4 mounting holes and 2 rectangular mounting holes. When the rear seat cover is placed, positioned and pressed, as long as the detection pin is inserted into the corresponding detection pin reference hole on the body seat, it can be determined whether the position and size of the corresponding hole of the rear seat cover are qualified. The go and no-go gauge is used to detect the contour of the installation matching surface of the rear seat cover and the contour of the end surface of the two rectangular mounting holes. When not in use, it is placed on the go and no-go gauge installation seat. Since the clearance of the reference surface of the go and no-go gauge, i.e. the height of the five positioning blocks, is a standard value of 5 mm, and the installation matching surface profile on the drawing is 1.0, i.e. the tolerance is ±0.5, this determines that the go gauge size is φ4.5 and the no-go gauge size is φ5.5. In order to facilitate the insertion of the go and no-go gauge into the gap between the installation surface and the detection surface, an inclined cylinder is added. The flush gauge is used to detect the contour of all peripheral trimming lines of the rear seat cover. When not in use, it is placed on the flush gauge mounting seat. During detection, the concave end is the through end and the convex end is the stop end. The flush gauge detection surface on the body, i.e. the trimming line profile detection reference surface, is on the same plane as the trimming line of the rear seat cover to be detected. Combined with the contour of all trimming lines on the drawing, i.e. the tolerance is ±1.5, this determines the size of the flush gauge.

[0055] Further preferably, the rectangular boss 552 at the lower end of the rectangular mounting hole detection pin and the contoured surfaces of the lower end surfaces of the corresponding two rectangular mounting holes on the body seat constitute an auxiliary reference mechanism.

[0056] The mounting matching surfaces on the outer sides of the two rectangular mounting holes on the left and right sides of the rear seat cover are located at the bottom of the inner concave surface, so that the profiling surfaces of the corresponding two rectangular mounting holes on the body seat are also the bottom of the concave surface. In this way, according to a similar method for detecting the contour of the mounting matching surface, the go / no-go gauge cannot contact the detection surface, i.e., the lower end faces of the two rectangular mounting holes, and thus cannot detect the contour of the end faces of the two rectangular mounting holes. The auxiliary reference mechanism added in the utility model is used to cooperate with the go / no-go gauge to detect the contour of the end faces of the two rectangular mounting holes. The rear seat cover is gently placed on the concave profiling body of the body seat according to the positioning requirements on the body seat. After positioning and pressing, the detection pin of the rectangular mounting hole is inserted into the detection pin reference hole of the corresponding rectangular mounting hole on one side of the body seat, and the lower end face 553 of the rectangular boss is fitted with the profiling surface of the corresponding rectangular mounting hole end face on the body seat. At this time, the rectangular mounting hole The stepped surface on the rectangular boss of the detection pin is located at the upper end of the rectangular mounting hole of the rear seat cover. This stepped surface on the rectangular boss is the auxiliary reference surface 554. Since the surface profile of the end face of the rectangular mounting hole of the rear seat cover is the same as the surface profile tolerance of the mounting matching surface, both are ±0.5, in order to share a through and no-go gauge, according to the thickness of the part of 0.7, the height of the lower end face of the rectangular mounting hole of the rear seat cover and the corresponding rectangular mounting hole end face profiling surface on the body seat is 5, and the height of the upper end face of the rectangular mounting hole of the rear seat cover and the stepped surface on the rectangular boss, i.e., the auxiliary reference surface, is also 5. The height of the rectangular boss is designed to be 10.7. At this time, a through and no-go gauge is inserted between the upper end face of the rectangular mounting hole of the rear seat cover and the stepped surface on the rectangular boss, i.e., the auxiliary reference surface. If the through gauge is through and the no-go gauge is not, the surface profile of the end face of the rectangular mounting hole is qualified. On the contrary, if the through gauge is not or the no-go gauge is through, the rear seat cover is unqualified. Similarly, the surface profile of the end face of the rectangular mounting hole of the rear seat cover on the other side can be tested.

[0057] Further preferably, all locating pin reference hole sleeves, detection pin reference hole sleeves, locating pins, detection pins, go and no-go gauges and flush gauges are made of Cr12MoV cold working die steel material, and are quenched heat treated to HRC52-60 and hard chrome plated on the surface. In this way, these parts are wear-resistant and have no deformation, making the detection accuracy of the detection device stable and the service life long.

[0058] The detection device of the utility model has a compact structure, ingenious design and easy operation. The device can be moved and placed at the production site. During the production and manufacturing process of the rear seat cover, it can quickly and accurately determine whether the contour of the installation matching surface and the position size of each hole meet the requirements of the drawing, and fully meet the requirements of the "three-inspection system" for quality control in the manufacturing process of the rear seat cover, thereby improving work efficiency and reducing production costs.

[0059] During the inspection, the quick clamping handles on the five quick clamping mechanisms are in a horizontal position, so that the five quick clamping mechanisms are in a loose state, and the rear seat cover 1 is gently placed on the concave contoured body of the mold seat according to the positioning requirements on the mold seat. At this time, the five RPS positioning points on the mounting surface of the rear seat cover are respectively fitted to the five Z-direction positioning points on the five positioning blocks on the mold seat, that is, limiting the three degrees of freedom of Z-direction movement, rotation around the X-axis, and rotation around the Y-axis. Insert the RPS1 locating pin through the B reference locating hole of the rear seat cover into the RPS1 locating pin reference hole on the body seat, that is, limit the two degrees of freedom of movement in the X direction and the Y direction, and then insert the RPS2 locating pin through the C reference locating hole of the rear seat cover into the RPS2 locating pin reference hole on the body seat, that is, limit the rotation around the Z axis by one degree of freedom. In this process, if one of the RPS1 and RPS2 locating pins cannot be smoothly inserted into the corresponding hole, interference will occur, and the rear seat cover will be judged to be unqualified, and the test will end. If there is no interference, it can be judged that the position and size of the two RPS holes of the rear seat cover are qualified, that is, the B reference hole and C reference hole positions on the installation surface of the rear seat cover are qualified. Then put the quick clamp handles on the 5 quick clamp mechanisms in a vertical position, and the 5 quick clamp mechanisms are in a clamping state, thus completing the positioning and clamping of the rear seat cover, ensuring that the rear seat cover is well positioned and will not shake.

[0060] At this time, the contour of the installation matching surface of the rear seat cover is tested with a through gauge, and the contour of the cutting edge line is tested with a flush gauge. If the through gauge is passed and the no-go gauge is stopped, it can be determined that the contour of the installation matching surface or the cutting edge line is qualified. Otherwise, if the through gauge is stopped or the no-go gauge is passed, it can be determined that the contour of the installation matching surface or the cutting edge line is unqualified.

[0061] The hole position detection uses a detection pin. If the detection pin can pass through the corresponding hole of the rear seat cover and smoothly insert into the corresponding detection pin reference hole on the body seat, it is qualified. Otherwise, it is unqualified. In the specific detection, the installation hole detection pin, installation hole detection pin, and rectangular installation hole detection pin are used to detect the position and size of 4 installation holes, 4 installation holes, and 2 rectangular installation holes.

[0062] Insert the rectangular mounting hole detection pin through the rectangular mounting hole of the rear seat cover into the corresponding reference hole of the profile seat, and make the lower end face of the rectangular boss fit with the corresponding rectangular mounting hole end face profiling surface on the profile seat. At this time, insert the through and stop gauge between the upper end face of the rectangular mounting hole of the rear seat cover and the upper step surface of the rectangular boss, i.e. the auxiliary reference surface. If the through gauge is through and the stop gauge is not, the surface profile of the rectangular mounting hole end face is qualified. On the contrary, if the through gauge is not or the stop gauge is through, it is unqualified. Similarly, the surface profile of the rectangular mounting hole end face of the rear seat cover on the other side can be tested.

[0063] After the inspection is completed, place all the inspection pins, go / no-go gauges and flush gauges on their respective seats, repeat the action of opening all quick-clamp mechanisms at the beginning of the inspection, and carefully remove the rear seat cover. This will quickly complete the inspection and determination of the contour of the rear seat cover installation matching surface, the contour of the trimming line and the position and size of each hole.

[0064] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A rear seat cover detection device, comprising a detection device, characterized in that: The detection device includes a stand, a positioning mechanism, a quick clamping mechanism and a detection tool. The stand includes a base, a reference surface, a reference hole and a detection component placement seat. The upper surface of the base is a platform with a rectangular structure. The vertical and horizontal directions of the platform are engraved with X-direction coordinate lines and Y-direction coordinate lines in the RPS coordinate system. Three reference surfaces and reference holes are respectively provided at the three corners of the platform. There are seven detection piece mounting seats, and the detection piece mounting seats respectively include a go / no-go gauge mounting seat, two positioning pin mounting seats, three detection pin mounting seats and a flush gauge mounting seat. The go / no-go gauge mounting seat is located directly in front of the X-axis coordinate line of the platform, and the two positioning pin mounting seats are respectively located on both sides of the Y-axis coordinate line of the platform, and the three detection pin mounting seats are respectively a mounting through-hole detection pin mounting seat located directly in front of the X-axis coordinate line of the platform, a mounting hole detection pin mounting seat located on the rear side of the X-axis coordinate line of the platform, and a rectangular mounting hole detection pin mounting seat; The positioning mechanism includes a mold seat, the upper surface of which is provided with a go / no-go gauge detection reference surface and a flush gauge detection reference surface, and the mold seat is provided with five Z-direction positioning blocks, which are fixed to the corresponding positions of the mold seat by screws through the coordinate values ​​of the five RPS positioning points on the mounting matching surface of the rear seat cover.

2. A rear seat cover detection device according to claim 1, characterized in that: The base is made of aluminum alloy after being cast and then processed precisely. Four feet are evenly distributed under the four corners of the base. Four handles are fixed at both ends of the long side of the base by screws.

3. A rear seat cover detection device according to claim 1, characterized in that: The reference surface and the reference hole are embedded in the platform through a stepped sleeve, the small outer circle of the stepped sleeve is interference fit with the hole on the platform, and the stepped sleeve is covered with a protective cover.

4. A rear seat cover detection device according to claim 1, characterized in that: The positioning mechanism also includes positioning pin reference holes, which are RPS1 positioning pin reference holes and RPS2 positioning pin reference holes. The RPS1 positioning pin reference holes and the RPS2 positioning pin reference holes are respectively arranged on both sides of the Y-axis coordinate line of the mold seat, and the positions of the RPS1 positioning pin reference holes and the RPS2 positioning pin reference holes match the coordinate positions of the rear seat cover reference B and reference C.

5. A rear seat cover detection device according to claim 4, characterized in that: The positioning mechanism also includes a detection pin reference hole, which includes four mounting hole detection pin reference holes, four mounting through-hole detection pin reference holes and two rectangular mounting hole detection pin reference holes. The four mounting hole detection pin reference holes are located on the rear side of the X-axis coordinate line of the body seat, the mounting through-hole detection pin reference hole is located on the front side of the X-axis coordinate line of the body seat, and the rectangular mounting hole detection pin reference hole is located on two symmetrical sides of the rear side of the X-axis coordinate line of the body seat. The opening positions of the detection pin reference holes are consistent with the RPS coordinate values ​​of the four mounting holes, four mounting through-holes and two rectangular mounting holes corresponding to the rear seat cover, and the shape and size of the detection pin reference holes are matched with the corresponding detection pins. The rectangular mounting hole detection pin reference holes are chamfered holes, and the other detection pin reference holes are round holes.

6. A rear seat cover detection device according to claim 4, characterized in that: Five quick clamping mechanisms are respectively provided on the front and rear sides of the mold base, each quick clamping mechanism includes a quick clamping base, a quick clamp and a quick clamping plate, the quick clamping base is fixed on the platform by screws, the quick clamp is fixed to the upper end of the quick clamping base, the quick clamping plate and the quick clamp are connected with quick clamp connecting screws, a U-shaped opening is provided on the head of the quick clamping plate, and the clamping point of each quick clamping plate is exactly on the small plane formed by the positioning points of the five positioning blocks.

7. The rear seat cover detection device according to claim 1, characterized in that: The detection instrument includes an RPS locating pin, a detection pin, a go / no-go gauge and a flush gauge. There are two RPS locating pins, namely the RPS1 locating pin and the RPS2 locating pin. There are three detection pins, namely the mounting through-hole detection pin, the mounting hole detection pin and the rectangular mounting hole detection pin. The lower end of the rectangular mounting hole detection pin is a chamfered cylinder, and the lower end of the rectangular mounting hole detection pin matches the chamfered reference hole of the rectangular mounting hole detection pin on the body seat. There is one go / no-go gauge, the go gauge size of the go / no-go gauge is φ4.5, and the no-go gauge size is φ5.

5. A 145° cylinder is formed between the go gauge and the no-go gauge at both ends of the go / no-go gauge. There is one flush gauge, the go / no-go ends of the flush gauge are L-shaped, and the L-shaped long side of the flush gauge fits the flush gauge detection reference surface. The concave end of the flush gauge is the go end, and the convex end of the flush gauge is the no-go end. The depth of the concave end is 1.5, and the height of the convex end is 1.

5.

8. The rear seat cover detection device according to claim 7, characterized in that: The rectangular boss at the lower end of the rectangular mounting hole detection pin and the contoured surfaces at the lower end surfaces of the corresponding two rectangular mounting holes on the profile seat constitute an auxiliary reference mechanism.

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