Method and tool for measuring diameter of taper bolt

Abstract

The invention discloses a method and tool for measuring the diameter of a taper bolt, and the tool comprises a pedestal, the pedestal is provided with a part installation hole and a measuring tool installation hole, the measuring tool installation hole is matched with a bolt, and the internal shape of the part installation hole is matched with the shape of the head of the taper bolt. The central axis of the measuring tool mounting hole and the to-be-measured position of the taper bolt are on the same line. The tool is suitable for diameter measurement of specific positions of all taper bolts, and the problem that a three-coordinate measuring instrument is time-consuming is solved. According to the method, zero setting is carried out on the dial indicator clamped on the measuring tool through the standard component, then the taper bolt is measured through the measuring tool, cost is low, efficiency is high, and measuring precision can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of assembly measurement, and in particular relates to a method and a tool for measuring the diameter of a tapered bolt. Background Art

[0002] Before assembling the tapered bolt, it is necessary to measure the diameter of the hole and the diameter of the tapered bolt at a specific position to calculate whether the matching amount is within the qualified range. Due to the taper of the bolt, it is impossible to directly use a micrometer or other measuring tool for measurement. If a three-coordinate measuring instrument is used for measurement, the time cost required is too high. In response to this problem, the Chinese invention patent with publication number CN104154844A discloses a special buckle oil casing internal thread sealing surface diameter measuring device and a measuring method thereof, and provides an internal thread sealing surface diameter measuring device, which can effectively and accurately measure the internal thread sealing surface diameter of the special buckle oil casing. The diameter measuring device is used to calibrate the diameter to zero through the sealing cone surface measurement point diameter calibration block. By comparing with the calibration blocks at each depth, the diameter of any point in the sealing section can also be directly measured. The method of this scheme is simple and efficient, but it is not suitable for measuring the outer diameter of the tapered bolt part, so a measuring tool and its standard parts specifically used for measuring the diameter of the tapered bolt at a specific position are designed to solve the problem of low efficiency in measuring the diameter. Summary of the invention

[0003] In order to solve the above problems, the present invention aims to provide a method and a tool for measuring the diameter of a tapered bolt.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a tool for measuring the diameter of a tapered bolt, comprising a base, on which a part mounting hole and a measuring tool mounting hole are opened, the measuring tool mounting hole is equipped with a bolt, the internal shape of the part mounting hole matches the head shape of the tapered bolt, and the central axis of the measuring tool mounting hole is on the same line as the position to be measured of the tapered bolt.

[0005] Furthermore, the part mounting hole is a semi-open hole, the measuring tool mounting hole is a countersunk hole, and the measuring tool mounting hole and the part mounting hole are connected and perpendicular to each other.

[0006] Furthermore, a threaded hole is opened on the base in a direction perpendicular to the measuring tool installation hole, the threaded hole is connected with the measuring tool installation hole, and a bolt is installed in the threaded hole to fix the measuring tool installed in the measuring tool installation hole.

[0007] Furthermore, the base is also provided with a handle integrally formed with the base.

[0008] A method for measuring the diameter of a tapered bolt using a tool, equipped with standard parts, comprising the following steps:

[0009] Step 1: Place the dial gauge vertically into the measuring tool installation hole and tighten the bolts to secure it;

[0010] Step 2: Place the tool on the standard part, put the standard part into the mounting hole of the part, make the probe of the micrometer against the cylinder of the standard part, and then zero the micrometer;

[0011] Step 3: Take out the standard part and use tools to measure the tapered bolt to be tested. The change in the micrometer is the deviation of the tapered bolt diameter relative to the standard part, and the diameter of the tapered bolt can be calculated.

[0012] Furthermore, in step 1, the probe of the micrometer is directed downward and penetrates into the mounting hole of the part to contact the tapered bolt.

[0013] Furthermore, the cylindrical diameter data of the contact point between the standard part and the micrometer is known, and the overall structure is consistent with the structure of the tapered bolt to be measured.

[0014] Compared with the prior art, the present invention has the following advantages: strong applicability, suitable for measuring almost all tapered bolt diameters; low cost, high efficiency, and guaranteed measurement accuracy. It takes about 10 minutes to measure the diameter of a tapered bolt by three-coordinate measurement, while this tool only takes less than ten seconds to measure the diameter of a tapered bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the tapered bolt in the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the standard parts in the present invention;

[0018] Figure 3 is a front view of the tapered bolt diameter tool of the present invention;

[0019] Figure 4 is a side view of the tapered bolt diameter tool of the present invention;

[0020] Figure 5 is a top view of the tapered bolt diameter tool of the present invention;

[0021] In the figure, 1-base; 2-part mounting hole; 3-gauge mounting hole; 4-bolt; 5-handle; A-taper bolt; B-standard part. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0023] Reference Figure 1 , it is necessary to measure the diameter Φ of the taper bolt A at 4.5mm from the bolt head, refer to Figure 2 It is standard part B, whose top cylindrical diameter is 11.3805mm, and is used to zero the micrometer of the measuring tool. Figure 3-Figure 5 It is a measuring tool that can directly measure the taper bolt after zeroing.

[0024] The tool includes a base 1, on which a part mounting hole 2 and a measuring tool mounting hole 3 are provided, and the measuring tool mounting hole 3 is equipped with a bolt 4. The internal shape of the part mounting hole 2 matches the head shape of the tapered bolt A, and the central axis of the measuring tool mounting hole 3 is on the same line as the position to be measured of the tapered bolt A. The part mounting hole 2 is a semi-open hole, and the measuring tool mounting hole 3 is a countersunk hole. The measuring tool mounting hole 3 is connected with the part mounting hole 2 and is perpendicular to each other. A threaded hole is provided in the base 1 in a direction perpendicular to the measuring tool mounting hole 3, and the threaded hole is connected with the measuring tool mounting hole 3. The bolt 4 is installed in the threaded hole to fix the measuring tool installed in the measuring tool mounting hole 3. The base 1 is also equipped with a handle 5 integrally formed with the base 1.

[0025] The specific measurement steps are as follows:

[0026] Step 1: Place the dial gauge into the measuring tool installation hole 3 and tighten the bolt 4 to fix it;

[0027] Step 2: Place the tool on standard part B, make the probe of the dial gauge against the cylinder of standard part B, and then zero the dial gauge. At this time, the 0 position is 11.3805mm;

[0028] Step 3: Take out the standard part B and use the tool to measure the tapered bolt A. The change value of the micrometer is the deviation value of the tapered bolt diameter relative to 11.3805mm. The diameter of the tapered bolt can be calculated, thus completing the entire measurement process.

[0029] The above is a detailed introduction to a method and tool for measuring the diameter of a tapered bolt provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tool for measuring the diameter of a tapered bolt, characterized in that: The invention comprises a base (1), a part mounting hole (2) and a measuring tool mounting hole (3) are provided on the base (1), the measuring tool mounting hole (3) is matched with a bolt (4), the internal shape of the part mounting hole (2) matches the head shape of the tapered bolt (A), and the central axis of the measuring tool mounting hole (3) is on the same line as the position to be measured of the tapered bolt (A).

2. The tool for measuring the diameter of a tapered bolt according to claim 1, characterized in that: The part mounting hole (2) is a semi-open hole, the measuring tool mounting hole (3) is a countersunk hole, and the measuring tool mounting hole (3) and the part mounting hole (2) are connected and perpendicular to each other.

3. The tool for measuring the diameter of a tapered bolt according to claim 1, characterized in that: A threaded hole is provided on the base (1) in a direction perpendicular to the measuring tool installation hole (3), the threaded hole is connected to the measuring tool installation hole (3), and a bolt (4) is inserted into the threaded hole to fix the measuring tool installed in the measuring tool installation hole (3).

4. The tool for measuring the diameter of a tapered bolt according to claim 3, characterized in that: The base (1) is also provided with a handle (5) which is integrally formed with the base (1).

5. A method for measuring the diameter of a tapered bolt using the tool described in claims 1-5, characterized in that: Equipped with standard parts (B), including the following steps: Step 1: Place the dial gauge vertically into the measuring tool mounting hole (3) and tighten the bolts (4) to secure it. Step 2: Place the tool on the standard part (B), put the standard part (B) into the part mounting hole (2), make the probe of the micrometer press against the cylinder of the standard part (B), and then zero the micrometer; Step 3: Take out the standard part (B) and use tools to measure the tapered bolt to be tested. The change in the micrometer value is the deviation of the tapered bolt diameter relative to the standard part (B), and the diameter of the tapered bolt can be calculated.

6. The method for measuring the diameter of a tapered bolt according to claim 5, characterized in that: In step 1, the probe of the micrometer is pointed downward and inserted into the part mounting hole (2) to contact the tapered bolt.

7. The method for measuring the diameter of a tapered bolt according to claim 5, characterized in that: The cylindrical diameter data of the contact point between the standard part (8) and the micrometer is known, and the overall structure is consistent with the structure of the taper bolt to be measured.

Images