A position gauge and testing method for irregular holes in a connector workpiece.

Abstract

This invention discloses a position measurement tool and method for irregular holes in a connector workpiece, which provides accurate and reliable positioning, convenient adjustment, and simple and safe operation. S1. Insert the positioning pin into the positioning pin hole of the base, and rotate the positioning pin so that the arc-shaped outer surface of the working part of the positioning pin faces away from the opening of the irregular hole; S2. Insert the guide part of the workpiece into the guide rail of the base, and push the workpiece along the guide rail into the cavity of the base until the workpiece contacts the positioning pin; S3. Rotate the positioning pin, and the arc-shaped outer surface of the working part of the positioning pin enters the irregular hole through rotation. During the rotation of the positioning pin, the workpiece slides along the guide rail under the drive of the working part of the positioning pin until the arc-shaped outer surface of the working part fits against the corresponding arc-shaped hole wall of the irregular hole, thus positioning the workpiece longitudinally along the cavity; S4. Insert the through end and the stop end of the measuring pin into the measuring hole of the base respectively. The through end should be inserted into the measuring hole of the workpiece, and the stop end should stop at the workpiece surface and cannot be inserted into the measuring hole.

Description

Technical Field

[0001] This invention relates to the field of inspection tool technology, and in particular to a positional inspection tool and inspection method for irregular holes in a connector workpiece. Background Technology

[0002] In existing technologies, the location of irregularly shaped holes is detected using measuring tools and rulers of standard shapes for comparison. The main problems with this method are:

[0003] a. The product reference and the measurement reference are inconsistent, which causes system measurement error.

[0004] b. Irregular holes are composed of multiple segments of arcs and straight lines. When using a knife-edge ruler for comparison, it is necessary to compare multiple segments of arcs separately, making it impossible to quickly and accurately determine whether the dimensions are up to standard.

[0005] c. Because the comparison and detection method is inconsistent with the actual function of the irregular hole, misjudgment may occur during the comparison and detection. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a position gauge and detection method for irregular holes in connector workpieces, which is accurate and reliable in positioning, convenient in adjustment, and simple and safe in operation.

[0007] The objective of this invention is achieved as follows:

[0008] A position gauge for a shaped hole in a connector workpiece, wherein the upper end of the workpiece has a linear guide portion, the lower front end of the workpiece has an shaped hole with an open structure, and the upper end of the workpiece has a measuring hole along a vertical direction. The shaped hole has at least one arc-shaped hole wall, comprising:

[0009] The base has a cavity, and a guide rail is provided in the cavity. The guide rail is used to slide with the guide part of the workpiece, so that the workpiece enters the cavity along the guide rail and is positioned laterally along the cavity.

[0010] The positioning pin includes a gripping part, a first positioning part, a working part, and a second positioning part arranged sequentially. A positioning pin hole is provided on the base along the transverse direction. The positioning pin hole communicates with the cavity of the base and is perpendicular to the guide rail. The first positioning part and the second positioning part of the positioning pin slide with the positioning pin hole, so that the positioning pin can rotate. The working part is located in the cavity of the base. The working part has an arc-shaped outer surface. The arc-shaped outer surface of the working part can be rotated into the irregular hole, and the arc-shaped outer surface of the working part fits against the arc-shaped hole wall of the irregular hole, so that the workpiece is positioned along the longitudinal direction of the cavity.

[0011] A measuring pin, wherein the two ends of the measuring pin are a through end and a stop end, and the upper end of the base is provided with a measuring pin hole, which is used to accommodate the through end and the stop end of the measuring pin.

[0012] Preferably, the cross-section of the working part is formed by an arc-shaped outer surface and two mutually perpendicular straight lines, and the center of the arc-shaped outer surface is located on the cross-section of the working part.

[0013] Preferably, the first positioning part arc surface, the working part arc-shaped outer surface, and the second positioning part arc surface of the positioning pin are concentric arc surfaces with the same diameter.

[0014] Preferably, the two perpendicular lines are each 0.5-2 mm from the center of the circle.

[0015] Preferably, the holding portion of the locating pin is provided with a position mark, which is used to identify the circumferential position of the working portion of the locating pin.

[0016] Preferably, the location is marked as a cutting surface.

[0017] A detection method based on a position gauge for irregularly shaped holes in a workpiece includes the following steps:

[0018] S1. Insert the positioning pin into the positioning pin hole of the base, and rotate the positioning pin so that the arc-shaped outer surface of the working part of the positioning pin faces away from the opening of the irregular hole.

[0019] S2. Insert the guide part of the workpiece into the guide rail of the base, and push the workpiece into the cavity of the base along the guide rail until the workpiece contacts the positioning pin.

[0020] S3. Rotary positioning pin: The arc-shaped outer surface of the working part of the positioning pin enters the irregular hole by rotation. During the rotation of the positioning pin, the workpiece slides along the guide rail under the drive of the working part of the positioning pin until the arc-shaped outer surface of the working part fits against the arc-shaped hole wall corresponding to the irregular hole, so that the workpiece is positioned along the longitudinal direction of the cavity.

[0021] S4. Insert the through end and the stop end of the measuring pin into the measuring hole of the base respectively. The through end should be inserted into the measuring hole of the workpiece, and the stop end should stop at the workpiece surface so that it cannot be inserted into the measuring hole of the workpiece.

[0022] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0023] Compact and convenient, easy to detect, more intuitive detection, accurate and reliable positioning, easy to adjust, simple and safe to operate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is the main view of the base;

[0026] Figure 3 This is a top view of the base;

[0027] Figure 4 This is a side view of the base;

[0028] Figure 5 This is the front view of the locating pin;

[0029] Figure 6 yes Figure 5 Sectional view of AA;

[0030] Figure 7 This is a diagram showing the locating pin in the open position.

[0031] Figure 8 This is a diagram showing the locating pin in the closed position.

[0032] Figure 9 This is the front view of the measuring pin;

[0033] Figure 10 This is a schematic diagram of the workpiece.

[0034] Figure Labels

[0035] In the attached diagram, 1 is the base, 2 is the locating pin, and 3 is the measuring pin. Detailed Implementation

[0036] See Figures 1-9 A position measurement fixture for a connecting seat workpiece with an irregular hole is provided. The workpiece has a linear guide (guide rail), an irregular hole with an open structure, and a square hole (measuring hole). The connecting seat workpiece is used to connect two different parts. The square hole and the irregular hole serve as positioning references for the connected parts. The irregular hole is composed of at least two arcs with different radii. The R4 arc serves as the positioning reference for the workpiece. The position measurement of the workpiece is the position dimension B from the R4 of the irregular hole to the reference surface A.

[0037] It includes a base 1, a positioning pin 2, and a measuring pin 3. The base 1 is as follows: Figures 2-4 As shown, the cavity of base 1 has guide rails that limit the left and right movement of the parts, such as... Figure 1 , Figure 4 The base measuring hole and the measuring pin 3 are fitted together, such as... Figure 1 , Figure 5 The positioning hole and the positioning pin 2 are fitted together.

[0038] like Figure 5 As shown, the locating pin 2 is a stepped shaft consisting of four parts, functionally named as follows: a gripping part, a first locating part, a working part, and a second locating part. The working part and the two locating parts are concentric cylinders of the same diameter. The locating parts mate with the locating pin holes in the base 1, allowing the locating pin to rotate easily. Figure 6 As shown, the cross-section of the working part is a sector formed by an outer circle and two mutually perpendicular straight lines, each 1 mm away from the center of the circle.

[0039] like Figure 7 When the fan-shaped arc surface faces downwards, the locating pin 2 is in the open state, allowing the part to move along the base guide surface. After the straight segment of the irregular hole on the part aligns with the straight segment of the locating pin, rotate the locating pin 90° so that the arc surface of the fan-shaped surface faces upwards and aligns with the arc segment of the irregular hole (e.g., Figure 8 The locating pin 2 is in the closed state, and the locking mechanism is used to restrict the front-to-back and downward freedom of the parts. A plane on the gripping part is parallel to the straight section of the working part, used to indicate the status of the locating pin.

[0040] like Figure 9 The measuring pin 3 has a through end and a stop end, used to locate the closed state of pin 2. Figure 8 The measuring tool converts the measuring reference from the square hole plane A to the irregular hole R4. The go and stop ends of the measuring pin are used to mate with the measuring hole (square hole) on the workpiece to check whether the position of the irregular hole is qualified.

[0041] A method for measuring the position of an irregularly shaped hole in a connector workpiece using a position gauge as described above, comprising the following steps:

[0042] S1. Insert the positioning pin into the positioning pin hole of the base, and rotate the positioning pin so that the plane of its gripping part is horizontal and facing upward (horizontal with the plane of the base);

[0043] S2. Insert the part to be tested into the base along the guide rail so that it contacts the locating pin;

[0044] S3. Rotate the locating pin so that the plane of the holding part of the locating pin is perpendicular to the horizontal plane (perpendicular to the base plane), and the locating pin locks the part in the base.

[0045] S4. Insert the through end and the stop end of the measuring pin into the measuring hole of the base respectively. The through end should pass through without obstruction, and the stop end should stop at the surface of the part and cannot be inserted.

[0046] S5. Rotate the locating pin so that the holding part of the locating pin is horizontal and facing upwards (horizontally aligned with the base plane). The locating pin will no longer lock the part. Remove the part along the guide rail to complete the measurement. The locating pin does not need to be removed during the measurement process.

[0047] Scope of application of the present invention

[0048] This invention can be applied to the position detection of irregular holes composed of multiple arc segments, providing accurate and reliable positioning, convenient adjustment, and simple and safe operation.

[0049] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A method for detecting the position of a workpiece with an irregularly shaped hole based on a positioning fixture, wherein the upper end of the workpiece is provided with a linear guide portion, the lower front end of the workpiece is provided with an irregularly shaped hole with an open structure, and the upper end of the workpiece is provided with a measuring hole along a vertical direction, wherein the irregularly shaped hole has at least one section of arc-shaped hole wall, characterized in that, Position measurement fixtures include: The base has a cavity, and a guide rail is provided in the cavity. The guide rail is used to slide with the guide part of the workpiece, so that the workpiece enters the cavity along the guide rail and is positioned laterally along the cavity. The positioning pin includes a gripping part, a first positioning part, a working part, and a second positioning part arranged sequentially. A positioning pin hole is provided on the base along the transverse direction. The positioning pin hole communicates with the cavity of the base and is perpendicular to the guide rail. The first positioning part and the second positioning part of the positioning pin slide with the positioning pin hole, so that the positioning pin can rotate. The working part is located in the cavity of the base. The working part has an arc-shaped outer surface. The arc-shaped outer surface of the working part can be rotated into the irregular hole, and the arc-shaped outer surface of the working part fits against the arc-shaped hole wall of the irregular hole, so that the workpiece is positioned along the longitudinal direction of the cavity. A measuring pin, wherein the two ends of the measuring pin are a through end and a stop end, and the upper end of the base is provided with a measuring pin hole, which is used to accommodate the through end and the stop end of the measuring pin; The detection method includes the following steps: S1. Insert the positioning pin into the positioning pin hole of the base, and rotate the positioning pin so that the arc-shaped outer surface of the working part of the positioning pin faces away from the opening of the irregular hole. S2. Insert the guide part of the workpiece into the guide rail of the base, and push the workpiece into the cavity of the base along the guide rail until the workpiece contacts the positioning pin. S3. Rotary positioning pin: The arc-shaped outer surface of the working part of the positioning pin enters the irregular hole by rotation. During the rotation of the positioning pin, the workpiece slides along the guide rail under the drive of the working part of the positioning pin until the arc-shaped outer surface of the working part fits against the arc-shaped hole wall corresponding to the irregular hole, so that the workpiece is positioned along the longitudinal direction of the cavity. S4. Insert the through end and the stop end of the measuring pin into the measuring hole of the base respectively. The through end should be inserted into the measuring hole of the workpiece, and the stop end should stop at the workpiece surface so that it cannot be inserted into the measuring hole of the workpiece.

2. The detection method based on the position measurement fixture of the irregular hole in the connector workpiece according to claim 1, characterized in that: The cross-section of the working part is formed by an arc-shaped outer surface and two mutually perpendicular straight lines, with the center of the arc-shaped outer surface located on the cross-section of the working part.

3. The detection method based on the position measurement fixture of the irregular hole in the connector workpiece according to claim 2, characterized in that: The first positioning part of the positioning pin has a circular arc surface, the working part has an arc-shaped outer surface, and the second positioning part has an arc surface that are concentric arc surfaces with the same diameter.

4. The detection method based on the position measurement fixture of the irregular hole in the connector workpiece according to claim 2, characterized in that: The two perpendicular lines are each 0.5-2mm from the center of the circle.

5. The detection method based on the position measurement fixture of the irregular hole in the connector workpiece according to claim 1, characterized in that: The holding part of the locating pin is provided with a position mark, which is used to identify the circumferential position of the working part of the locating pin.

6. The detection method based on the position measurement fixture of the irregular hole in the connector workpiece according to claim 5, characterized in that: The location is marked as the cutting surface.

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