Position degree and flatness testing fixture

Abstract

The utility model discloses a position degree and flatness testing fixture, which comprises a plurality of contour supporting strips, a go-no go gauge, an edge folding block, a plug gauge and a positioning jig for detecting an assembly hole at the upper end of a cover plate, the plurality of contour supporting strips are connected end to end to form an outer contour shape of a flange surface of the cover plate to be detected, and a plurality of positioning pins are arranged on the contour supporting strips. The go-no go gauge carries out passing or stopping perforation detection on a positioning hole of a flange face of a cover plate to be detected, the edge folding block is used for being attached to the outer side of the contour supporting strip to slide, the plug gauge is inserted between the contour supporting strip and the positioned cover plate in a penetrating mode, the positioning jig is erected in a kidney-shaped hole of the cover plate, and assembling pins are arranged on the two sides of the lower end face of the positioning jig. According to the detection tool, the peripheral normal flatness, the location degree, the positioning aperture and the assembly hole precision of the cover plate to be detected are synchronously detected through the go-no go gauge, the edge folding block and the plug gauge as a positioning jig, and the detection can be rapidly completed aiming at the cover plates which are formed by stamping and punching in batches and have partial flaws and defective products.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of jig and inspection equipment, in particular to a jig that is convenient for inspecting the position and flatness of a controller cover. Background Art

[0002] The inverter electric control box of new energy vehicles is an important box structure to ensure moisture and water resistance of internal components. It is widely used in the new energy vehicle market. The cover of the box, as a structural part, also needs to have good hardness and sealing. Figure 1 A number of through holes are set at different intervals around the flange of the cover plate. After the through holes are located at the corresponding screw holes of the box body, they are fixed by screws. Since the cover plate is thin, warping and bending are inevitable in the stamping of metal sheets. Moreover, due to the large number of through holes, the error of hole spacing exceeding the standard is inevitable after stamping and bending. Therefore, for the cover plates formed by batch stamping and punching, there are some defective products. For the technical needs of multiple detection of parameters including flatness, position, aperture size, etc., it is necessary for us to design a gauge that can simultaneously implement detection in multiple aspects. Utility Model Content

[0003] The purpose of the utility model is to design a kind of inspection equipment that can carry out inspections in many aspects at the same time in view of the technical needs of multiple inspections including flatness, position, aperture size and other parameters for the cover plates formed by batch stamping and punching in the background technology, which have some defects and defective products.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A position and flatness inspection tool comprises a plurality of contour support strips arranged on a base, a go / no-go gauge, a folding block and a plug gauge for inspecting the peripheral through holes of a cover plate, and a positioning fixture for inspecting the assembly holes at the upper end of the cover plate.

[0006] The plurality of contour support strips are arranged flatly on the base, and are connected at the ends to surround the outer contour shape of the flange surface of the cover plate to be measured. The contour support strips are provided with a plurality of positioning pins, and the positioning pins are positioned at the flange holes of the flange surface of the cover plate to be measured. The contour support strips are also provided with a plurality of through holes, and the through holes are matched with the positioning holes of the flange surface of the cover plate to be measured, and the aperture of the positioning hole is smaller than the aperture of the through hole.

[0007] The go / no-go gauge is used to perform a pass or stop perforation test on the positioning hole of the flange surface of the cover plate to be tested, wherein the go gauge can pass through the positioning hole, while the no-go gauge cannot pass through the positioning hole.

[0008] The folding block is used to slide on the outside of the contour support strip, and the detection surface set on the fitting surface touches the outer contour of the positioned cover plate. If there is no contact interference between the detection surface and the outer contour of the cover plate, it is qualified.

[0009] The plug gauge is inserted between the contour support strip and the positioned cover plate. If there is no clamping interference after sliding one circle, the flatness of the cover plate is judged to be qualified.

[0010] The positioning fixture is mounted in the waist-shaped hole of the cover plate, and assembly pins are arranged on both sides of the lower end surface of the positioning fixture. The assembly pins are sleeved into the assembly holes on both sides of the waist-shaped hole. If the shaft holes can be sleeved, the position accuracy of the assembly holes is qualified.

[0011] Furthermore, arc-shaped detection platforms are provided on both sides of the lower end surface of the positioning fixture, and the arc-shaped detection platforms are fitted with the inner wall of the waist-shaped hole of the cover plate to ensure accurate positioning.

[0012] Furthermore, the qualified size range of the plug gauge thickness is 0.5 to 1.0 mm.

[0013] Furthermore, the external contour shape size is larger than the contour size of the flange surface of the cover plate to be tested, and the upper surface flatness of several contour support strips reaches the qualified standard.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] This position and flatness inspection tool uses go and no-go gauges, folding blocks and plug gauges as well as special positioning fixtures to simultaneously complete the inspection of the outer peripheral flatness, position, positioning hole diameter and assembly hole accuracy on both sides of the waist-shaped hole of the cover plate to be tested. It can quickly complete the inspection of defective cover plates that have been formed by batch stamping and punching, which is practical and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the cover plate described in this embodiment.

[0017] Figure 2 It is a left side top view of the position and flatness checking fixture of this embodiment.

[0018] Figure 3 It is a top view of the right side of the position and flatness inspection tool of this embodiment.

[0019] Figure 4 It is a side view of the positioning fixture described in this embodiment.

[0020] In the figure: 1-flange surface, 2-flange hole, 3-waisted hole, 4-go and no-go gauge, 5-second go and no-go gauge, 6-contour support bar, 7-locating pin, 8-plug gauge, 9-base, 10-locating fixture, 11-folding block, 12-arc detection table, 13-assembly pin. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model will be described clearly and completely in the following in conjunction with the accompanying drawings in the form of embodiments.

[0022] See also Figures 1 to 4 In the embodiment of the utility model, a position and flatness inspection tool is provided, comprising five contour support strips 6 arranged on a base 9, a go / no-go gauge 4 for inspecting the through holes on the outer periphery of the cover plate, a folding block 11 and a plug gauge 8, and a positioning fixture 10 for inspecting the assembly holes on the upper end of the cover plate. The five contour support strips 6 are arranged flatly on the base 9, and the ends are connected to form the outer contour shape of the flange surface 1 of the cover plate to be measured. The contour support strips 6 are provided with a plurality of positioning pins 7, and the positioning pins 7 are positioned on the flange hole 2 of the flange surface 1 of the cover plate to be measured. The contour support strips 6 are also provided with a plurality of through holes, and the through holes are matched with the positioning holes on the flange surface 1 of the cover plate to be measured, and the aperture of the positioning hole is smaller than the aperture of the through hole.

[0023] See also Figure 2 and Figure 3 The go / no-go gauge 4 is used to perform a pass or cut-off perforation test on the positioning hole of the flange surface 1 of the cover plate to be tested, wherein the go gauge can pass through the positioning hole, while the no-go gauge cannot pass through the positioning hole.

[0024] See also Figure 3 The folding block 11 is used to slide outside the contour support strip 6, and the detection surface set on the fitting surface touches the outer contour of the positioned cover plate. If there is no contact interference between the detection surface and the outer contour of the cover plate, it is qualified.

[0025] In particular, the plug gauge 8 is inserted between the contour support strip 6 and the positioned cover plate. If there is no clamping interference after sliding one circle, the flatness of the cover plate is judged to be qualified. If there is clamping and difficulty in sliding, it is proved that the flatness at that location is unqualified.

[0026] See also Figure 4 The positioning fixture 10 is set in the waist-shaped hole 3 of the cover plate, and assembly pins 13 are set on both sides of the lower end surface of the positioning fixture 10. The assembly pins 13 are inserted into the assembly holes on both sides of the waist-shaped hole 3. If the shaft hole can be inserted into the sleeve, the position accuracy of the assembly hole is qualified.

[0027] See also Figure 4The two sides of the lower end surface of the positioning fixture 10 are provided with arc-shaped detection platforms 12, and the arc-shaped detection platforms 12 are fitted with the inner wall of the waist-shaped hole 3 of the cover plate to ensure accurate positioning.

[0028] See also Figure 3 The thickness of the plug gauge 8 is selected to be 0.8 mm.

[0029] A further embodiment is that the external contour shape size is larger than the contour size of the flange surface 1 of the cover plate to be tested, and the upper surface flatness of the five contour support strips 6 reaches a qualified standard.

[0030] The above describes in detail the implementation modes of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes. Various changes, modifications, substitutions and variations can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A position and flatness gauge, characterized by: The invention comprises a plurality of contour support strips (6) arranged on a base (9), a go / no-go gauge (4) for detecting the through holes on the outer periphery of the cover plate, a folding block (11) and a plug gauge (8), and a positioning jig (10) for detecting the assembly holes on the upper end of the cover plate. The plurality of contour support strips (6) are evenly arranged on the base (9) and connected at their ends to surround the outer contour shape of the flange surface (1) of the cover plate to be measured. The contour support strips (6) are provided with a plurality of positioning pins (7), and the positioning pins (7) are positioned directly on the flange holes (2) of the flange surface (1) of the cover plate to be measured. The contour support strips (6) are also provided with a plurality of through holes. The go / no-go gauge (4) is used to perform a pass or stop perforation test on the positioning hole of the flange surface (1) of the cover plate to be tested, wherein the go gauge can pass through the positioning hole, while the no-go gauge cannot pass through the positioning hole. The folding block (11) is used to slide on the outside of the contour support strip (6), and the detection surface set on the fitting surface touches the outer contour of the cover plate that has been positioned. If there is no contact interference between the detection surface and the outer contour of the cover plate, it is qualified. The plug gauge (8) is inserted between the contour support strip (6) and the positioned cover plate, and if there is no clamping interference after sliding one circle, it is determined that the flatness of the cover plate is qualified. The positioning fixture (10) is mounted in the waist-shaped hole (3) of the cover plate. Assembly pins (13) are arranged on both sides of the lower end surface of the positioning fixture (10). The assembly pins (13) are sleeved into the assembly holes on both sides of the waist-shaped hole (3). If the shaft holes can be sleeved, the assembly hole position accuracy is qualified.

2. The position and flatness gauge according to claim 1, characterized in that: The external contour shape dimensions are larger than the contour dimensions of the flange surface (1) of the cover plate to be tested, and the upper surface flatness of a plurality of contour support strips (6) meets the qualified standard.

3. The position and flatness gauge according to claim 1, characterized in that: The through hole is matched with a positioning hole on the flange surface (1) of the cover plate to be tested, and the aperture of the positioning hole is smaller than the aperture of the through hole.

4. The position and flatness gauge according to claim 1, characterized in that: Arc-shaped detection platforms (12) are arranged on both sides of the lower end surface of the positioning fixture (10), and the arc-shaped detection platform (12) is in contact with the inner wall of the waist-shaped hole (3) of the cover plate.

5. The position and flatness gauge according to claim 1, characterized in that: The qualified thickness size range of the plug gauge (8) is 0.5 to 1.0 mm.

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