Three-needle thread pitch diameter measuring method

Abstract

The invention discloses a three-needle thread pitch diameter measuring method, which comprises the following steps of: measuring the pitch diameter of an external thread workpiece by using a three-needle thread pitch diameter measuring tool; the two measuring needles penetrate through the two needle penetrating holes and then are sleeved with the anti-disengagement sleeve for position limitation, the two needle penetrating holes guarantee the distance between the two bottom measuring needles, and when external threads of a plurality of components are measured, external threads of an external thread workpiece are directly matched with the two bottom measuring needles, so that the measurement accuracy is improved. The situation that the distance between the two measuring pins at the bottom needs to be positioned during measurement each time is avoided, and the problem that the efficiency is low when external threads of a plurality of components are measured is solved.

Description

Technical Field

[0001] This invention relates to a three-needle method for measuring the pitch diameter of threads, belonging to the field of thread measurement technology. Background Technology

[0002] After the external thread of a component is machined, a sampling inspection is required to compare the pitch diameter data of the external thread with the design value. In the existing technology (see Chinese Patent Publication No. CN106871766A), when three gauges are used to measure the pitch diameter data of the external thread, the two gauges at the bottom have no limit, and the distance between the two gauges at the bottom needs to be positioned for each measurement, which is inefficient when measuring the external threads of multiple components. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a three-needle method for measuring the pitch diameter of threads.

[0004] The present invention is achieved through the following technical solutions.

[0005] The present invention provides a three-wire method for measuring the pitch diameter of threads, comprising: a measurement process of measuring the pitch diameter of an external thread workpiece using a three-wire method thread pitch diameter measuring tool.

[0006] The measurement process is as follows: Take the U-shaped support of the three-needle thread pitch diameter measuring tool. After the two measuring needles of the three-needle thread pitch diameter measuring tool pass through the two needle holes, they are fitted with anti-dislodgement sleeves. Place the external thread workpiece above the two measuring needles that pass through the needle holes. The pitch diameter of the external thread workpiece mates with the two measuring needles in the two needle holes. The third measuring needle is inserted from the U-groove onto the pitch diameter of the external thread workpiece. Use calipers to clamp the three measuring needles to obtain the pitch diameter data of the external thread workpiece. When measuring other external thread workpieces of the same size, remove the third measuring needle from the U-groove. Then put the external thread workpiece and the third measuring needle back in.

[0007] A three-wire thread pitch diameter measuring tool, comprising: A U-shaped support with measuring needles spaced at defined intervals.

[0008] The U-shaped support is fixedly connected to an outwardly suspended extension arm plate, which consists of two spaced-apart extension arm plates.

[0009] An extension arm plate is integrally fixedly connected to the top and bottom surfaces of the U-shaped support, and the extension arm plate extends outward from both the top and bottom surfaces of the U-shaped support; the extension arm plates on the top and bottom surfaces of the U-shaped support are two spaced apart.

[0010] The extension arm plate is provided with needle holes, and there are two needle holes spaced apart, with a distance P between the centers of the two needle holes; the extension arm plate at the middle of the two needle holes is provided with a U-groove, and the bottom center of the U-groove is located at half the P position.

[0011] It also includes three measuring needles, two of which pass through two needle holes, so that there are measuring needles with a defined interval on the U-shaped support, and the third measuring needle can be installed in the U-groove.

[0012] It also includes an anti-disengagement sleeve, which is larger than the width of the U-groove and the needle hole; the measuring needles on both sides of the extension arm plate are covered with anti-disengagement sleeves.

[0013] The anti-slip sleeve is made of rubber.

[0014] The beneficial effects of this invention are as follows: after the two measuring needles pass through the two needle holes, they are fitted with anti-dislodgement sleeves to limit their position. The two needle holes ensure the spacing between the two bottom measuring needles. When measuring the external threads of multiple components, the external thread of the external thread workpiece directly engages with the two bottom measuring needles, avoiding the need to locate the spacing between the two bottom measuring needles every time a measurement is performed, thus solving the problem of low efficiency when measuring the external threads of multiple components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view schematic diagram of the U-shaped support of the present invention; Figure 3 This is a side view schematic diagram of the present invention when measuring externally threaded workpieces; Figure 4 This is a front view schematic diagram of the present invention when measuring externally threaded workpieces; In the diagram: 1-U-shaped support; 11-Extension arm plate; 12-Needle hole; 13-U-groove; 2-Measuring needle; 3-Anti-disengagement sleeve; 4-External threaded workpiece. Detailed Implementation

[0016] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0017] like Figures 1 to 4 As shown.

[0018] This application discloses a three-wire thread pitch diameter measuring tool, comprising: by Figure 2 The base is a U-shaped support 1 that forms a U shape after being rotated 90 degrees counterclockwise. An extension arm plate 11 is integrally fixedly connected to the top and bottom surfaces of the U-shaped support 1. The extension arm plate 11 extends outward from both the top and bottom surfaces of the U-shaped support 1. There are two extension arm plates 11 on the top and bottom surfaces of the U-shaped support 1.

[0019] The extension arm plate 11 is provided with needle holes 12, and there are two needle holes 12 spaced apart, with a distance P between the centers of the two needle holes 12; the extension arm plate 11 at the middle of the two needle holes 12 is provided with a U-groove 13, and the bottom center of the U-groove 13 is located at half P.

[0020] It also includes three measuring needles 2, two of which pass through two needle holes 12, and the third measuring needle 2 can be installed in the U-groove 13; it also includes a rubber anti-dislodgement sleeve 3, which is larger than the width of the U-groove 13 and the needle holes 12; the measuring needles 2 on both sides of the extension arm plate 11 are covered with anti-dislodgement sleeves 3 to prevent the measuring needles 2 from falling off.

[0021] Take three measuring needles 2. Two of the measuring needles 2 pass through two needle holes 12 and are then fitted with anti-dislodgement sleeves 3 to limit their position. The two needle holes 12 ensure the spacing between the two bottom measuring needles 2. When measuring the external threads of multiple components, the external thread of the external thread workpiece 4 directly engages with the two bottom measuring needles 2, avoiding the need to locate the spacing between the two bottom measuring needles each time, thus solving the problem of low efficiency when measuring the external threads of multiple components.

[0022] by Figure 3 For reference, this application provides a three-pin thread pitch diameter measurement method, comprising: taking a U-shaped support 1 of a three-pin thread pitch diameter measuring tool; inserting two measuring pins 2 of the tool through two pin holes 12 and then fitting them into an anti-dislodgement sleeve 3; placing an external thread workpiece 4 above the two measuring pins 2 through the pin holes 12; the external thread pitch diameter of the external thread workpiece 4 aligning with the two measuring pins 2 within the pin holes 12; inserting a third measuring pin 2 from a U-groove 13 onto the external thread pitch diameter of the external thread workpiece 4; and using calipers to clamp the three measuring pins 2 to obtain the external thread pitch diameter data of the external thread workpiece 4. When measuring other external thread workpieces 4 of the same size, the third measuring pin 2 can be removed from the U-groove 13. At this time, the two bottom measuring pins 2 maintain a distance within the two pin holes 12 before inserting the external thread workpiece 4 again.

Claims

1. A three-wire method for measuring the pitch diameter of a thread, characterized in that, include: The process of measuring the pitch diameter of an external thread workpiece (4) using a three-needle thread pitch diameter measuring tool.

2. The three-wire thread pitch diameter measurement method as described in claim 1, characterized in that: The measurement process is as follows: Take the U-shaped support (1) of the three-needle thread pitch diameter measuring tool, and put the two measuring needles (2) of the three-needle thread pitch diameter measuring tool through the two needle holes (12) and then put on the anti-dislodgement sleeve (3). Place the external thread workpiece (4) above the two measuring needles (2) that pass through the needle holes (12). The pitch diameter of the external thread workpiece (4) is matched with the two measuring needles (2) in the two needle holes (12). The third measuring needle (2) is put into the external thread pitch diameter of the external thread workpiece (4) from the U groove (13). The caliper clamps the three measuring needles (2) to obtain the external thread pitch diameter data of the external thread workpiece (4). When measuring other external thread workpieces (4) of the same size, remove the third measuring needle (2) in the U groove (13). Then put in the external thread workpiece (4) and the third measuring needle (2).

3. The three-wire thread pitch diameter measurement method as described in any one of claims 1 or 2, characterized in that, The three-wire thread pitch diameter measuring tool includes: U-shaped support (1), with measuring needles (2) spaced at a defined interval on the U-shaped support (1).

4. The three-wire thread pitch diameter measurement method as described in claim 3, characterized in that: The U-shaped support (1) is fixedly connected to an extension arm plate (11) that extends outward in the air, and the extension arm plate (11) consists of two spaced-apart plates.

5. The three-wire thread pitch diameter measurement method as described in claim 4, characterized in that: The top and bottom surfaces of the U-shaped support (1) are integrally fixed with extension arm plates (11), and the top and bottom surfaces of the U-shaped support (1) are suspended outward with extension arm plates (11); the extension arm plates (11) on the top and bottom surfaces of the U-shaped support (1) are two spaced apart.

6. The three-wire thread pitch diameter measurement method as described in claim 5, characterized in that: The extension arm plate (11) is provided with needle holes (12), and there are two needle holes (12) spaced apart, with a distance P between the centers of the two needle holes (12); the extension arm plate (11) in the middle of the two needle holes (12) is provided with a U groove (13), and the bottom center of the U groove (13) is located at half P.

7. The three-wire thread pitch diameter measurement method as described in claim 6, characterized in that: It also includes three measuring needles (2), two of which pass through two needle holes (12), so that there are measuring needles (2) with a defined interval on the U-shaped support (1), and the third measuring needle (2) can be installed in the U-groove (13).

8. The three-wire thread pitch diameter measurement method as described in claim 7, characterized in that: It also includes an anti-disengagement sleeve (3), which is larger than the width of the U-groove (13) and the needle hole (12); the measuring needles (2) on both sides of the extension arm plate (11) are covered with anti-disengagement sleeves (3).

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