A detection jig for detecting an arc of a part

Abstract

This utility model relates to the field of inspection fixture technology, specifically to an inspection fixture for detecting the curvature of a part, comprising: a base plate, a positioning component disposed on the base plate, a curvature measuring component disposed on the base plate, and a replaceable curvature gauge disposed on the base plate; the positioning component is provided with a positioning pin, the curvature measuring component includes an arc-shaped slide rail disposed on the base plate and a measuring instrument slidably disposed on the arc-shaped slide rail, and the replaceable curvature gauge includes a curvature detection gauge and a mounting block, the curvature detection gauge being slidable relative to the base plate. By sliding the measuring instrument on the arc-shaped slide rail, the curvature position on the part to be inspected is measured, the actual deviation of each inspection point is calculated, and the actual deviation is compared with the allowable error to draw a conclusion, and the error points and error values ​​can be recorded; simultaneously, for the bottom curvature part, by checking whether the slidable standard curvature detection gauge fits the bottom curvature surface, it is possible to intuitively determine whether the bottom curvature surface of the part to be inspected is qualified.

Description

Technical Field

[0001] This utility model belongs to the field of inspection tool technology, and specifically relates to an inspection fixture for detecting the curvature of parts. Background Technology

[0002] Parts inspection fixtures are specialized tools used in industrial production to measure and inspect the dimensions, shape, position, and other parameters of parts. They can quickly and accurately determine whether parts meet standards, promptly identify non-conforming products, reduce scrap and rework, and thus ensure product quality.

[0003] Curved part inspection fixtures are specifically designed for inspecting parts with curved features. They can efficiently and accurately determine whether curved parts meet design requirements. Generally, the curvature of the part being tested is compared with a standard curved model to determine its compliance. The part is placed on the fixture, its position is fixed using the fixture's positioning device, and then direct contact comparison is performed. However, for the inspection of batches of parts or high-precision parts, it is necessary to know the specific dimensional deviations of each part to adjust the processing technology. Furthermore, for parts with a curved bottom surface, it is difficult to observe whether this part completely fits the curved model, which can easily lead to defective products affecting subsequent processes. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a testing fixture for detecting the curvature of parts. It is reasonably designed and has a simple structure, and can quickly and accurately determine whether the parts meet the standards.

[0005] Technical solution: In order to achieve the above objectives, this utility model provides a testing fixture for detecting the curvature of a part, including: a base plate, a positioning component disposed on the base plate, a curvature measuring component disposed on the base plate, and a replaceable curvature gauge disposed on the base plate.

[0006] The positioning component is provided with a positioning pin for positioning the part. The arc measurement component includes an arc-shaped slide rail on the base plate and a measuring instrument slidably mounted on the arc-shaped slide rail. The replaceable arc gauge includes an arc detection gauge and a mounting block. The arc detection gauge is detachably mounted on the mounting block and can slide relative to the base plate.

[0007] As a further limitation of the above solution, the positioning assembly also includes a column vertically mounted on the base plate, a positioning pin disposed on the top surface of the column, and an elbow clamp disposed on the column, with a rubber pad at the pressing end of the elbow clamp. The column provides support for the part to be inspected, the positioning pin on the top surface of the column positions the part to be inspected, the elbow clamp presses the part to be inspected, and the rubber pad at the end of the elbow clamp effectively prevents hard contact between metals from damaging the part to be inspected.

[0008] As a further limitation of the above solution, the arc measurement assembly also includes a universal adjustment bracket, the bottom of which is provided with an arc-shaped slider that slides on an arc-shaped slide rail. The measuring instrument is located at the end of the universal adjustment bracket. The measuring instrument slides on the arc-shaped slide rail to measure the arc of the part under inspection.

[0009] As a further limitation of the above scheme, the measuring instrument is a dial indicator.

[0010] As a further limitation of the above solution, the replaceable curvature gauge also includes a groove on the base plate, in which the mounting block is slidably embedded. The bottom of the curvature detection gauge is T-shaped, and the curvature detection gauge is slidably positioned in the groove through this T-shaped bottom. The curvature detection gauge is used to detect the curvature position of the bottom surface of the part to be inspected, and the curvature can be quickly determined by comparison with the curvature detection gauge.

[0011] As a further limitation of the above solution, a push-pull rod is provided on the other side of the mounting block, and a gripping ball head is provided at the end of the push-pull rod. The arc detection gauge is connected to the mounting block by bolts.

[0012] As a further limitation of the above scheme, the arc-shaped slide rail is located at the arc-shaped position of the inspected part, and the center of the arc-shaped slide rail coincides with the center of the arc-shaped position on the standard part and the arc is consistent.

[0013] As a further limitation of the above solution, a set of handles is provided on the base plate.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] This utility model discloses a steering knuckle unit positioning and installation fixture. The result is simple and the design is reasonable. A measuring instrument slides on an arc-shaped slide rail to measure the arc-shaped position on the part to be inspected. The actual deviation at each detection point is calculated using the values ​​on a dial indicator. The actual deviation is then compared with the allowable error to draw a conclusion. Error points and error values ​​can be recorded, which helps in adjusting the processing strategy. Simultaneously, for the arc-shaped part at the bottom, this utility model uses a sliding standard arc detection gauge to check whether it fits the arc-shaped surface of the bottom, allowing for a direct assessment of whether the arc-shaped surface of the bottom of the part to be inspected is qualified. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a steering knuckle unit positioning and installation fixture according to the present invention;

[0017] Figure 2 This is a schematic diagram of the positioning component described in this utility model;

[0018] Figure 3 This is a schematic diagram of the arc measurement component described in this utility model;

[0019] Figure 4 This is a schematic diagram of the replaceable arc gauge described in this utility model;

[0020] Figure 5 The part to be inspected.

[0021] In the diagram: 1-base plate, 11-handle;

[0022] 2-Positioning component, 21-Positioning pin, 22-Column, 23-Elbow clamp;

[0023] 3-Radius measuring component, 31-Arc-shaped slide rail, 32-Measuring instrument, 33-Universal adjustment bracket;

[0024] 4-Replaceable radii gauge, 41-Radii testing gauge plate, 42-Mounting block, 43-Slide groove, 44-Push-pull rod;

[0025] 5-Parts to be inspected. Detailed Implementation

[0026] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] like Figures 1-5 As shown, a testing fixture for detecting the curvature of a part includes: a base plate 1, a positioning component 2 disposed on the base plate 1, a curvature measuring component 3 disposed on the base plate 1, and a replaceable curvature gauge 4 disposed on the base plate 1.

[0028] The positioning component 2 is provided with a positioning pin 21 for positioning the part. The arc measurement component 3 includes an arc-shaped slide rail 31 on the base plate 1 and a measuring instrument 32 slidably disposed on the arc-shaped slide rail 31. The replaceable arc gauge 4 includes an arc detection gauge 41 and a mounting block 42. The arc detection gauge 41 is detachably disposed on the mounting block 42 and the arc detection gauge 41 can slide relative to the base plate 1.

[0029] Specifically, the positioning component 2 also includes a column 22 vertically mounted on the base plate 1, a positioning pin 21 mounted on the top surface of the column 22, and an elbow clamp 23 mounted on the column 22, with a rubber pad at the end of the pressing end of the elbow clamp 23.

[0030] The arc measurement component 3 also includes a universal adjustment bracket 33. The bottom of the universal adjustment bracket 33 is provided with an arc-shaped slider, which slides on an arc-shaped slide rail 31. The measuring instrument 32 is located at the end of the universal adjustment bracket 33, and the measuring instrument 32 can be adjusted in various directions through the universal adjustment bracket 33.

[0031] Specifically, the measuring instrument 32 is a dial indicator. Using a standard arc-shaped slide rail 31 as a reference, the dial indicator reads the contour deviation between the part to be inspected 5 and the arc-shaped slide rail 31, indirectly determining whether the workpiece curvature meets the requirements, and the deviation value can be measured without complicated chord length / chord height conversion.

[0032] In addition, the replaceable arc gauge 4 also includes a slide groove 43 on the base plate 1, the mounting block 42 is slidably embedded in the slide groove 43, the bottom of the arc detection gauge 41 is T-shaped, and the arc detection gauge 41 is slidably disposed in the slide groove 43 through the T-shaped bottom.

[0033] The mounting block 42 has a push-pull rod 44 on its other side, with a gripping ball end. The arc detection gauge 41 is bolted to the mounting block 42. The operator holds the gripping ball and pushes and pulls the mounting block 42 to move the arc detection gauge 41. The operator judges whether the position is qualified by whether the arc detection gauge 41 passes exactly through the bottom arc of the part to be inspected 5.

[0034] Specifically, the arc-shaped slide rail 31 is positioned at the arc-shaped location of the part being inspected, and the center of the arc-shaped slide rail 31 coincides with the center of the arc-shaped location on the standard part, with the same arc degree. The arc degree and radius of curvature of the arc-shaped slide rail 31 are completely consistent with the theoretically acceptable arc degree of the part being inspected 5, and the reference error of the arc-shaped slide rail 31 must be ≤ ±0.001mm to ensure that the moving trajectory of the measuring instrument 32 strictly conforms to the standard arc. In addition, a wear-resistant alloy can be selected to avoid reference drift caused by wear during long-term use.

[0035] Specifically, the base plate 1 is provided with a set of handles 11.

[0036] The following is a method for using a testing fixture for detecting the curvature of a part provided by this utility model: Place the part to be inspected 5 on the positioning component 2, and position it by cooperating with the positioning pin 21 through the positioning hole on the part to be inspected 5. At the same time, it can be preliminarily judged whether the part is qualified; then use the elbow clamp 23 to clamp the part to be inspected 5, and then use the measuring instrument 32 to measure the curvature position on the part to be inspected 5. Calculate the actual deviation of each testing point by the value on the dial indicator, and then compare the actual deviation with the allowable error to draw a conclusion. If the deviation of all testing points is within the allowable error and there is no local sudden change, the workpiece curvature is judged to be qualified; if the deviation of any testing point exceeds the allowable error, or the deviation shows a trend change (such as the deviation gradually increases throughout the process, indicating that the workpiece curvature radius is too small), the curvature is judged to be unqualified. Finally, install the accurate curvature detection gauge 41 on the mounting block 42, and push and pull the curvature detection gauge 41 back and forth to observe whether it passes exactly through the bottom of the part to be inspected 5.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A testing fixture for detecting the curvature of a part, characterized in that, include: Base plate (1), positioning component (2) provided on base plate (1), arc measuring component (3) provided on base plate (1), and replaceable arc gauge (4) provided on base plate (1). The positioning component (2) is provided with a positioning pin (21) for positioning the part. The arc measurement component (3) includes an arc slide rail (31) on the base plate (1) and a measuring instrument (32) slidably disposed on the arc slide rail (31). The replaceable arc gauge (4) includes an arc detection gauge (41) and a mounting block (42). The arc detection gauge (41) is detachably disposed on the mounting block (42), and the arc detection gauge (41) can slide relative to the base plate (1).

2. The inspection fixture for detecting the curvature of a part according to claim 1, characterized in that, The positioning component (2) also includes a column (22) vertically mounted on the base plate (1), a positioning pin (21) mounted on the top surface of the column (22), and an elbow clamp (23) mounted on the column (22), with a rubber pad at the end of the clamping end of the elbow clamp (23).

3. The inspection fixture for detecting the curvature of a part according to claim 1, characterized in that, The arc measurement component (3) also includes a universal adjustment bracket (33), the bottom of which is provided with an arc-shaped slider, which slides on an arc-shaped slide rail (31), and the measuring instrument (32) is located at the end of the universal adjustment bracket (33).

4. The inspection fixture for detecting the curvature of a part according to claim 1, characterized in that, The measuring instrument (32) is a dial indicator.

5. A testing fixture for detecting the curvature of a part according to claim 1, characterized in that, The replaceable arc gauge (4) also includes a slide groove (43) on the base plate (1), the mounting block (42) is slidably embedded in the slide groove (43), the bottom of the arc detection gauge (41) is T-shaped, and the arc detection gauge (41) is slidably disposed in the slide groove (43) through the T-shaped bottom.

6. A testing fixture for detecting the curvature of a part according to claim 1, characterized in that, A push-pull rod (44) is provided on the other side of the mounting block (42), and a ball-holding head is provided at the end of the push-pull rod (44). The arc detection gauge (41) is connected to the mounting block (42) by bolts.

7. A testing fixture for detecting the curvature of a part according to claim 1, characterized in that, The arc-shaped slide rail (31) is located at the arc-shaped position of the inspected part, and the center of the arc-shaped slide rail (31) coincides with the center of the arc-shaped position on the standard part and the arc is consistent.

8. A testing fixture for detecting the curvature of a part according to claim 1, characterized in that, The base plate (1) is provided with a set of handles (11).

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