CN106524879B - Dovetail groove angle measuring device - Google Patents
Dovetail groove angle measuring device Download PDFInfo
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- CN106524879B CN106524879B CN201611179999.6A CN201611179999A CN106524879B CN 106524879 B CN106524879 B CN 106524879B CN 201611179999 A CN201611179999 A CN 201611179999A CN 106524879 B CN106524879 B CN 106524879B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0025—Measuring of vehicle parts
- G01B5/0028—Brakes, brakeshoes, clutches
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Abstract
A method of measuring a dovetail angle using a dovetail angle measurement device, comprising: each vernier caliper is provided with an inner measuring claw and an outer measuring claw, the inner measuring claw and the outer measuring claw are provided with arc-shaped measuring ends suitable for being in contact with the groove wall of the dovetail groove, and the arc radiuses of the arc-shaped measuring ends of the inner measuring claw and the outer measuring claw of the same vernier caliper are the same; the arc radiuses of the arc measuring ends of the two different vernier calipers are different.
Description
Technical Field
The invention relates to the technical field of measuring tools, in particular to a dovetail groove angle measuring device.
Background
With the trend of high-speed development of railway trains, higher requirements are required on the braking performance of the trains, in a disc type braking system of the trains, a brake pad is one of key parts, a dovetail type interface is generally adopted in the conventional brake pad, the dovetail type interface mode is an interface specified by the international railway Union (UIC) standard, the universality is wide, and the brake pad is simple and convenient to install and disassemble. Thus, the angle of the dovetail becomes one of the critical dimensions of the damper blade.
The prior art discloses a dovetail groove inspection device as publication No. CN202719937U, which comprises a handle 21 and a detection body 22, wherein the cross section of the detection body 22 in the direction perpendicular to the length direction thereof is an isosceles trapezoid, and the width of the upper surface of the detection body is smaller than that of the bottom surface of the detection body; the handle 21 is connected to the detection body 22 at the upper surface.
However, in the prior art, the dovetail groove inspection device is placed in the dovetail groove to be inspected, and if the dovetail groove cannot be placed in the inspection device, the dovetail groove is too small and the size is not qualified; if the dovetail groove passes, the dovetail groove is qualified. The inspection device cannot measure the accurate value of the dimension of the workpiece, and has no exact standard for 'right pass', has high requirements on operators, and is easy to generate larger errors and even measurement errors.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the problems that the dovetail groove inspection device in the prior art cannot measure the accurate value of the workpiece dimension, and no exact standard exists for "right pass", and large errors and even measurement errors are easy to occur, so as to provide a dovetail groove angle measuring device, which comprises:
each vernier caliper is provided with an inner measuring claw and an outer measuring claw, the inner measuring claw and the outer measuring claw are provided with arc-shaped measuring ends suitable for being in contact with the groove wall of the dovetail groove, and the arc radiuses of the arc-shaped measuring ends of the inner measuring claw and the outer measuring claw of the same vernier caliper are the same; the arc radiuses of the arc measuring ends of the two different vernier calipers are different.
And the length ratio of the connecting line N between the circular arc measuring end of the vernier caliper and the tangent point of the tested dovetail groove to the bevel edge M of the tested dovetail groove is more than or equal to 0.5 and less than 1.
The length ratio of the tangent point connecting line N to the inclined edge M is more than or equal to 0.8 and less than 1.
The inner measuring claw and the outer measuring claw of the vernier caliper are arranged on the same side of a main scale of the vernier caliper and are positioned on the same horizontal line.
The inner measuring claw is positioned on the inner side of the outer measuring claw, the inner measuring claw and the outer measuring claw which are adjacently arranged are of an integrally formed inverted T-shaped structure, and the two sides of the T-shaped head at the tail end of the inverted T-shaped structure are respectively provided with the arc-shaped measuring ends.
The circular arc measuring end is a cylindrical measuring head or a spherical measuring head.
A method for measuring the dovetail convex groove angle by using the dovetail groove angle measuring device, wherein two vernier calipers of the dovetail groove angle measuring device are respectively a first vernier caliper and a second vernier caliper, and the method comprises the following steps:
s1) clamping two side surfaces of the dovetail convex groove by using an inner measuring claw on the first vernier caliper to obtain a width value a;
s2) clamping two side surfaces of the dovetail convex groove by using an inner measuring claw on the second vernier caliper to obtain a width value b;
s3), calculating the inclination angle theta 1 of the first grooves arranged at two sides of the dovetail convex groove through a formula according to the width value a and the width value b.
The inclination angle θ 1 in the step S3 is calculated by formula 1-1, where formula 1-1 is:
r is the arc radius of the arc measuring end of the first vernier caliper;
r is the arc radius of the arc measuring end of the second vernier caliper;
a is the length value measured by the first vernier caliper;
b is the length measured by the second vernier caliper.
A method for measuring a dovetail groove angle by using the dovetail groove angle measuring device, wherein two vernier calipers of the dovetail groove angle measuring device are respectively a first vernier caliper and a second vernier caliper, and the method comprises the following steps:
s1) clamping two side surfaces of the dovetail groove by using an external measuring claw on the first vernier caliper to obtain a width value c;
s2) clamping two side surfaces of the dovetail groove by using an external measuring claw on the second vernier caliper to obtain a width value d;
s3), calculating the inclination angle theta 2 of the second grooves arranged at two sides of the dovetail groove through a formula according to the width value c and the width value d.
The inclination angle θ 2 in the step S3 is calculated by using a formula 1-2, where the formula 1-2 is:
theta 2 is the inclination angle of a second groove of the dovetail groove;
r is the arc radius of the arc measuring end of the first vernier caliper;
r is the arc radius of the arc measuring end of the second vernier caliper;
c is the length value measured by the first vernier caliper;
d is the length measured by the second vernier caliper.
The technical scheme of the invention has the following advantages:
1. the dovetail groove angle measuring device provided by the invention can accurately measure the accurate numerical value of the dovetail convex groove or the dovetail groove by measuring the width approximate value of the dovetail groove through the two vernier calipers and calculating through a formula, and has the advantages of simple operation and accurate and reliable measurement.
2. According to the dovetail groove angle measuring device provided by the invention, the length ratio of the connecting line N of the circular arc measuring ends of the two vernier calipers and the tangent point of the measured dovetail groove to the bevel edge M of the measured dovetail groove is more than or equal to 0.5 and less than 1, wherein the length ratio of N to M is infinitely close to 1 and is an optimal value, and the ratio of N to M is close to 1, so that the difference value of the radiuses of measuring heads on the two vernier calipers is increased, the measuring error is reduced, and the measuring accuracy of the measuring device is improved.
3. According to the dovetail groove angle measuring device provided by the invention, the inner measuring claw and the outer measuring claw of the vernier caliper are arranged on the same side of the main scale of the vernier caliper and are positioned on the same horizontal line, so that the dovetail groove angle measuring device has the advantages of convenience for measuring by operators and small occupied space.
4. According to the dovetail groove angle measuring device provided by the invention, the measuring claw is of an inverted T-shaped structure, the circular arc measuring ends are arranged on the left side and the right side of the T-shaped head, the dovetail convex groove or the dovetail groove can be measured by using two vernier calipers, and the dovetail groove angle measuring device has the advantages of wide application range, low use cost and convenience in carrying.
5. According to the dovetail groove angle measuring device provided by the invention, the arc-shaped measuring end is a cylindrical measuring head, and the arc-shaped measuring head is not easy to deviate due to line contact with the dovetail groove, so that the measuring accuracy of the measuring device is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a dovetail groove angle measuring device provided by the present invention;
FIG. 2 is a schematic view of the connection between the arc measuring end and the inverted T-shaped structure according to the present invention;
FIG. 3 is a schematic view of a connection structure of a cylindrical probe and an inverted T-shaped structure according to the present invention;
FIG. 4 is a schematic view of the dovetail groove position measured by the angle measuring device of the present invention;
FIG. 5 is a schematic view of the dovetail groove position measured by the angle measuring device of the present invention;
FIG. 6 is a schematic structural view of a dovetail groove measured by the angle measuring device of the present invention;
FIG. 7 is a schematic structural view of a dovetail groove measured by the angle measuring apparatus according to the present invention;
FIG. 8 is a schematic diagram of the measuring head position when the cylindrical measuring head provided by the present invention measures the dovetail groove;
fig. 9 is a perspective view of a dovetail groove inspection device in the prior art.
Description of reference numerals:
1-a vernier caliper; 2-inner measuring jaw; 3-external measuring claw; 4-circular arc measuring end; 5-a main scale; 6-inverted T-shaped structure; 7-a first vernier caliper; 8-dovetail tongue; 9-second vernier caliper; 10-a first groove; 11-dovetail grooves; 12-a second groove; 13-a cylindrical probe; 21-a handle; 22-detection body.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
each vernier caliper 1 is provided with an inner measuring claw 2 and an outer measuring claw 3, and the measuring ends of the inner measuring claw 2 and the outer measuring claw 3 of the vernier caliper 1 are cylindrical measuring heads 13 with the same diameter; the diameters of the cylindrical measuring heads 13 of two different vernier calipers 1 are different.
According to the dovetail groove angle measuring device, the width approximate value of the dovetail groove is measured by the two vernier calipers, and the accurate numerical value of the dovetail convex groove or the dovetail groove can be accurately measured by formula calculation, and the dovetail groove angle measuring device has the advantages of being simple in operation and accurate and reliable in measurement;
the measuring end is a cylindrical measuring head, is not prone to shifting in line contact with the dovetail groove, and has the advantage of improving measuring accuracy of the measuring device.
Specifically, as shown in fig. 8, the length ratio of the tangent point connecting line N between the cylindrical measuring head 13 of the vernier caliper 1 and the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is greater than or equal to 0.5 and less than 1.
Specifically, as shown in fig. 8, the length ratio of the tangent point connecting line N to the oblique side M is greater than or equal to 0.8 and less than 1.
According to the dovetail groove angle measuring device, the length ratio of a tangent point connecting line N between the measuring heads of the vernier calipers and the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is more than or equal to 0.5 and less than 1, wherein the length ratio of N to M is infinitely close to 1 and is an optimal value, the ratio of N to M is close to 1, so that the radius difference of the measuring heads on the vernier calipers is increased, the measuring error is reduced, and the measuring accuracy of the measuring device is improved.
Specifically, as shown in fig. 3, the inner measuring jaw 2 and the outer measuring jaw 3 of the vernier caliper 1 are disposed on the same side of the main scale 5 of the vernier caliper and on the same horizontal line.
The inner measuring claw and the outer measuring claw of the vernier caliper are arranged on the same side of the main scale of the vernier caliper and are positioned on the same horizontal line, and the vernier caliper has the advantages of convenience for measurement of operators and small occupied space.
Specifically, as shown in fig. 2, the inner measuring claw 2 is located inside the outer measuring claw 3, the inner measuring claw 2 and the outer measuring claw 3 which are adjacently arranged are an inverted T-shaped structure 6 which is integrally formed, and the cylindrical measuring heads 13 are respectively arranged on two sides of a T-shaped head at the tail end of the inverted T-shaped structure 6.
Above-mentioned dovetail groove angle measuring device, the T shape structure of measuring claw for invering, the first left and right sides of T shape all is equipped with spherical gauge head, uses two slide caliper both can measure forked tail tongue or forked tail recess, has application scope extensively, use cost low and portable's advantage.
Specifically, as shown in fig. 4 and 6, a method for measuring a dovetail tongue angle using the dovetail groove angle measuring device, in which two vernier calipers 1 are a first vernier caliper 7 and a second vernier caliper 9, respectively, includes the steps of:
s1) clamping two side surfaces of the dovetail convex groove 8 by using the inner measuring claw 2 on the first vernier caliper 7 to obtain a width value a;
s2) clamping two side surfaces of the dovetail convex groove 8 by using the inner measuring claw 2 on the second vernier caliper 9 to obtain a width value b;
s3) calculating the inclination angle theta of the first grooves 10 arranged at the two sides of the dovetail convex groove 8 through a formula according to the width value a and the width value b1。
In the above-described measuring method for measuring the dovetail tongue angle,
the inclination angle θ in the step S31The calculation is carried out by the formula 1-1, wherein the formula 1-1 is as follows:
θ1the inclination angle of the first groove 10 of the dovetail convex groove 8;
r is the radius of the cylindrical measuring head 13 of the first vernier caliper 7;
r is the radius of the cylindrical measuring head 13 of the second vernier caliper 9;
a is the length measured by the first vernier caliper 7;
b is the length measured by the second vernier caliper 9.
Example 2
A dovetail groove angle measuring device, as shown in fig. 1 and 3, comprising:
each vernier caliper 1 is provided with an inner measuring claw 2 and an outer measuring claw 3, and the measuring ends of the inner measuring claw 2 and the outer measuring claw 3 of the vernier caliper 1 are cylindrical measuring heads 13 with the same diameter; the diameters of the cylindrical measuring heads 13 of two different vernier calipers 1 are different.
According to the dovetail groove angle measuring device, the width approximate value of the dovetail groove is measured by the two vernier calipers, and the accurate numerical value of the dovetail convex groove or the dovetail groove can be accurately measured by formula calculation, and the dovetail groove angle measuring device has the advantages of being simple in operation and accurate and reliable in measurement;
the measuring end is a cylindrical measuring head, is not prone to shifting in line contact with the dovetail groove, and has the advantage of improving measuring accuracy of the measuring device.
Specifically, as shown in fig. 8, the length ratio of the tangent point connecting line N between the cylindrical measuring head 13 of the vernier caliper 1 and the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is greater than or equal to 0.5 and less than 1.
Specifically, as shown in fig. 8, the length ratio of the tangent point connecting line N to the oblique side M is greater than or equal to 0.9 and less than 1.
According to the dovetail groove angle measuring device, the length ratio of a tangent point connecting line N between the measuring heads of the vernier calipers and the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is more than or equal to 0.5 and less than 1, wherein the length ratio of N to M is infinitely close to 1 and is an optimal value, the ratio of N to M is close to 1, so that the radius difference of the measuring heads on the vernier calipers is increased, the measuring error is reduced, and the measuring accuracy of the measuring device is improved.
Specifically, as shown in fig. 2, the inner measuring jaw 2 and the outer measuring jaw 3 of the vernier caliper 1 are disposed on the same side of the main scale 5 of the vernier caliper and on the same horizontal line.
The inner measuring claw and the outer measuring claw of the vernier caliper are arranged on the same side of the main scale of the vernier caliper and are positioned on the same horizontal line, and the vernier caliper has the advantages of convenience for measurement of operators and small occupied space.
Specifically, as shown in fig. 2, the inner measuring claw 2 is located inside the outer measuring claw 3, the inner measuring claw 2 and the outer measuring claw 3 which are adjacently arranged are an inverted T-shaped structure 6 which is integrally formed, and the cylindrical measuring heads 13 are respectively arranged on two sides of a T-shaped head at the tail end of the inverted T-shaped structure 6.
Above-mentioned dovetail groove angle measuring device, the T shape structure of measuring claw for invering, the first left and right sides of T shape all is equipped with spherical gauge head, uses two slide caliper both can measure forked tail tongue or forked tail recess, has application scope extensively, use cost low and portable's advantage.
Specifically, as shown in fig. 5 and 7, a measuring method for measuring a dovetail groove angle using a dovetail groove angle measuring device whose two vernier calipers 1 are a first vernier caliper 7 and a second vernier caliper 9, respectively, includes the steps of:
s1) clamping two side surfaces of the dovetail groove 11 by using an external measuring claw 3 on the first vernier caliper 7 to obtain a width value c;
s2) clamping two side surfaces of the dovetail groove 11 by using an external measuring claw 3 on the second vernier caliper 9 to obtain a width value d;
s3) calculating the inclination angle theta of the second grooves 12 arranged at the two sides of the dovetail groove 11 by a formula according to the width value c and the width value d2。
In the above-described measuring method of measuring the dovetail groove angle,
the inclination angle θ in the step S32The calculation is carried out by the formula 1-2, wherein the formula 1-1 is as follows:
θ2the inclination angle of the second groove 12 of the dovetail groove 11;
r is the radius of the cylindrical measuring head 13 of the first vernier caliper 7;
r is the radius of the cylindrical measuring head 13 of the second vernier caliper 9;
c is the length measured by the first vernier caliper 7;
d is the length measured by the second vernier caliper 9.
Example 3
A dovetail groove angle measuring apparatus, as shown in fig. 1, comprising:
each vernier caliper 1 is provided with an inner measuring claw 2 and an outer measuring claw 3, and the measuring ends of the inner measuring claw 2 and the outer measuring claw 3 of the vernier caliper 1 are spherical measuring heads with the same diameter; the diameters of the spherical measuring heads of the two different vernier calipers 1 are different.
According to the dovetail groove angle measuring device, the width approximate value of the dovetail groove is measured by the two vernier calipers, and then the accurate numerical value of the dovetail convex groove or the dovetail groove can be accurately measured through formula calculation, and the dovetail groove angle measuring device has the advantages of being simple in operation and accurate and reliable in measurement.
Specifically, as shown in fig. 8, the length ratio of the tangent point connecting line N between the spherical measuring head of the vernier caliper 1 and the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is greater than or equal to 0.5 and less than 1.
Specifically, as shown in fig. 8, the length ratio of the tangent point connecting line N to the oblique side M is greater than or equal to 0.9 and less than 1.
According to the dovetail groove angle measuring device, the length ratio of a tangent point connecting line N between the measuring heads of the vernier calipers and the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is more than or equal to 0.5 and less than 1, wherein the length ratio of N to M is infinitely close to 1 and is an optimal value, the ratio of N to M is close to 1, so that the radius difference of the measuring heads on the vernier calipers is increased, the measuring error is reduced, and the measuring accuracy of the measuring device is improved.
Specifically, as shown in fig. 2, the inner measuring jaw 2 and the outer measuring jaw 3 of the vernier caliper 1 are disposed on the same side of the main scale 5 of the vernier caliper and on the same horizontal line.
The inner measuring claw and the outer measuring claw of the vernier caliper are arranged on the same side of the main scale of the vernier caliper and are positioned on the same horizontal line, and the vernier caliper has the advantages of convenience for measurement of operators and small occupied space.
Specifically, as shown in fig. 2, the inner measuring claw 2 is located on the inner side of the outer measuring claw 3, the inner measuring claw 2 and the outer measuring claw 3 which are adjacently arranged are an inverted T-shaped structure 6 which is integrally formed, and the spherical measuring heads are respectively arranged on two sides of a T-shaped head at the tail end of the inverted T-shaped structure 6.
Above-mentioned dovetail groove angle measuring device, the T shape structure of measuring claw for invering, the first left and right sides of T shape all is equipped with spherical gauge head, uses two slide caliper both can measure forked tail tongue or forked tail recess, has application scope extensively, use cost low and portable's advantage.
Specifically, as shown in fig. 5 and 7, a measuring method for measuring a dovetail groove angle using a dovetail groove angle measuring device whose two vernier calipers 1 are a first vernier caliper 7 and a second vernier caliper 9, respectively, includes the steps of:
s1) clamping two side surfaces of the dovetail groove 11 by using an external measuring claw 3 on the first vernier caliper 7 to obtain a width value c;
s2) clamping two side surfaces of the dovetail groove 11 by using an external measuring claw 3 on the second vernier caliper 9 to obtain a width value d;
s3) calculating the inclination angle theta of the second grooves 12 arranged at the two sides of the dovetail groove 11 by a formula according to the width value c and the width value d2。
In the above-described measuring method of measuring the dovetail groove angle,
the inclination angle θ in the step S32The calculation is carried out by the formula 1-2, wherein the formula 1-1 is as follows:
θ2the inclination angle of the second groove 12 of the dovetail groove 11;
r is the radius of the spherical measuring head of the first vernier caliper 7;
r is the spherical gauge head radius of the second vernier caliper 9;
c is the length measured by the first vernier caliper 7;
d is the length measured by the second vernier caliper 9.
Claims (6)
1. A method of measuring a dovetail angle using a dovetail angle measuring device, the measuring device comprising:
each vernier caliper (1) is provided with an inner measuring claw (2) and an outer measuring claw (3), the inner measuring claw (2) and the outer measuring claw (3) are provided with arc-shaped measuring ends (4) suitable for being in contact with the groove wall of the dovetail groove, and the arc radiuses of the arc-shaped measuring ends (4) of the inner measuring claw (2) and the outer measuring claw (3) of the vernier caliper (1) are the same; the arc radiuses of the arc measuring ends (4) of the two different vernier calipers (1) are different;
the method for measuring the dovetail convex groove angle comprises the following steps of:
s1) clamping two side surfaces of the dovetail convex groove (8) by using an inner measuring claw (2) on the first vernier caliper (7) to obtain a width value a;
s2) clamping two side surfaces of the dovetail convex groove (8) by using an inner measuring claw (2) on a second vernier caliper (9) to obtain a width value b;
s3) calculating the inclination angle theta of the first grooves (10) arranged at the two sides of the dovetail convex groove (8) through a formula according to the width value a and the width value b1；
The inclination angle θ in the step S31The calculation is carried out by the formula 1-1, wherein the formula 1-1 is as follows:
θ1the angle of inclination of a first groove (10) of the dovetail convex groove (8); r is the arc radius of the arc measuring end (4) of the first vernier caliper (7); r is the arc radius of the arc measuring end (4) of the second vernier caliper (9); a is the length value measured by the first vernier caliper (7); b is the length value measured by the second vernier caliper (9); or the like, or, alternatively,
the two vernier calipers (1) of the dovetail groove angle measuring device are respectively a first vernier caliper (7) and a second vernier caliper (9), and the method for measuring the dovetail groove angle comprises the following steps:
s1) using an outer measuring claw (3) on the first vernier caliper (7) to clamp two side surfaces of the dovetail groove (11) to obtain a width value c;
s2) using an outer measuring claw (3) on a second vernier caliper (9) to clamp two side surfaces of the dovetail groove (11) to obtain a width value d;
s3) according to the width value c and the width value d, passing through a common ruleThe formula calculates the inclination angle theta of the second grooves (12) arranged at both sides of the dovetail groove (11)2；
The inclination angle θ in the step S32The calculation is carried out by the formula 1-2, wherein the formula 1-2 is as follows:
θ2the angle of inclination of a second groove (12) of the dovetail groove (11); r is the arc radius of the arc measuring end (4) of the first vernier caliper (7); r is the arc radius of the arc measuring end (4) of the second vernier caliper (9); c is the length value measured by the first vernier caliper (7); d is the length measured by the second vernier caliper (9).
2. The method of measuring a dovetail angle using a dovetail angle measuring device according to claim 1,
the length ratio of a connecting line N between the circular arc measuring end (4) of the vernier caliper (1) and a tangent point of the dovetail groove to be measured to the bevel edge M of the dovetail groove to be measured is more than or equal to 0.5 and less than 1.
3. A method for measuring a dovetail angle using a dovetail angle measuring device according to claim 2, wherein the length ratio of said tangent point connecting line N to said hypotenuse M is 0.8 or more and less than 1.
4. The method for measuring a dovetail angle using a dovetail angle measuring device according to claim 1, wherein the inner measuring jaw (2) and the outer measuring jaw (3) of the vernier caliper (1) are disposed on the same side of the main scale (5) of the vernier caliper and on the same horizontal line.
5. The method for measuring the dovetail angle by using the dovetail angle measuring device according to claim 4, wherein the inner measuring claw (2) is located at the inner side of the outer measuring claw (3), the inner measuring claw (2) and the outer measuring claw (3) which are adjacently arranged are in an inverted T-shaped structure (6) which is integrally formed, and the circular arc-shaped measuring ends (4) are respectively arranged at two sides of the T-shaped head at the tail end of the inverted T-shaped structure (6).
6. Method for measuring a dovetail angle using a dovetail angle measuring device according to any of claims 1-5, characterized in that the circular arc shaped measuring end (4) is a cylindrical stylus (13) or a spherical stylus.
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| CN109839049B (en) * | 2019-02-26 | 2021-04-20 | 江苏理工学院 | Quick and simple dovetail groove guide rail size measuring device |
| CN110044311B (en) * | 2019-04-26 | 2020-11-20 | 江苏理工学院 | Dovetail groove guide rail sliding table measuring device and measuring method thereof |
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| SU1516731A1 (en) * | 1987-10-06 | 1989-10-23 | А.В.Дегт рёв | Method of measuring half an angle of profile of symmetric thread |
| JP3722288B2 (en) * | 2003-03-03 | 2005-11-30 | 福島県 | Cylindrical shape measurement method |
| JP2013044738A (en) * | 2011-08-22 | 2013-03-04 | Shuji Hatano | Radioactivity measurement accuracy improvement device |
| CN103471479A (en) * | 2012-06-05 | 2013-12-25 | 浙江众达传动股份有限公司 | Instrument for measuring arc tooth groove width of internal gear and internal spline |
| CN102967246A (en) * | 2012-12-05 | 2013-03-13 | 柳州欧维姆机械股份有限公司 | Inner cone obliquity steel ball measuring gauge and measuring method thereof |
| CN203240989U (en) * | 2013-04-25 | 2013-10-16 | 上海臣轩机械有限公司 | Special-purpose measurement tool for measuring width of dovetail groove |
| CN203364718U (en) * | 2013-06-09 | 2013-12-25 | 大连冶金轴承股份有限公司 | Thrust ball bearing and thrust angle contact ball bearing race center diameter template device |
| CN205485036U (en) * | 2016-04-01 | 2016-08-17 | 哈尔滨理工大学 | No umbra stereo microscope lighting system that spotlight angle is adjustable |
| CN205505909U (en) * | 2016-04-10 | 2016-08-24 | 辽宁工程技术大学 | Coal -winning machine helical drum parameter measurement chi |
| NL1041839B1 (en) * | 2016-04-22 | 2017-11-16 | Iac Geometrische Ingenieurs B V | A method and apparatus increasing the accuracy of the two ball or wire measurement of pitch diameter, simple pitch diameter and virtual pitch diameter of internal and external screw threads and thread gauges. |
| CN206281442U (en) * | 2016-12-19 | 2017-06-27 | 北京天宜上佳新材料股份有限公司 | A kind of dovetail groove angle measurement unit |
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