TW389834B - Concentricity testing method and measuring device for concentricity testing - Google Patents

Abstract

The present invention relates to a concentricity testing method and measuring device for concentricity testing. The measuring device for concentricity testing includes a workpiece abutting unit and a circular distance measuring unit. The circular distance measuring unit includes a measuring implement, and the measuring implement includes a start measure point and an end measure point located on the measure line thereof; the workpiece abutting unit includes two abutting points for abutting the outer circle of the workpiece to be measured, and each abutting point is located on the symmetric positions on the two sides of the measure line, and wherein, when the outer circle of the workpiece to be measured abuts the two abutting points, the start measure point may be located on the circumference of the inner circle of the workpiece to be measured, and the end measure point may be located on the tangential point of the circumference of the outer circle of the workpiece to be measured. In such a manner, it is able to measure the distance between the inner circle and the outer circle of the respective diameter of each outer circle tangential point of the workpiece to be measured, to further compare each of the distance values, thereby obtaining the concentricity by subtracting the minimum from the maximum.

Description

V. Description of the invention (1) A7 B7 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs i. 1. Field of Invention The present invention relates to a method of concentricity detection and the amount of concentricity detection method applicable to the method. The device can be used for detecting the concentricity between the inner and outer circles of a circular workpiece or a double cylindrical workpiece. 2. Explanation of previous techniques The definition of concentricity refers to the relationship between the center of an outer circle A and the inner circle, and the distance between the center and the inner circle B. A conventional instrument used to measure concentricity of a ring-shaped workpiece with an inner circle and an outer circle. One method is to measure the outer circle at three points to obtain the center coordinate value, and then to the inner circle at three points. Measure to get the coordinate value of its inner circle center, and then calculate the distance between the two coordinate values' to find its concentricity. However, this kind of measuring instrument for detecting concentricity is not only very complicated and expensive, but also usually needs to be performed in a special room with environmental control, thereby increasing the installation cost. For general scrap merchants or production lines, It's a big load. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a simple and accurate method for detecting concentricity, and a method for measuring the amount of concentricity applicable to the method of concentricity detection, which is simple to manufacture, inexpensive to manufacture, and can obtain accurate measurement results. Device. In order to achieve the above object, the present invention discloses a concentricity measuring and measuring device 'for detecting the concentricity of a workpiece to be measured with an inner circle and an outer circle, comprising: a round distance measuring unit having a measuring tool, It includes a measuring point and a final measuring point located on the measuring line; a workpiece abutting unit having

x 297 mm) (Please read the notes on the back f to write this page) I-^ · · Copy t

C-· Line A7 B7 V. Description of the invention (2) Two contact points for externally pulling the outer circle wl 旰 I from the outside of the receiving workpiece, and each contact point is located at the symmetrical position of == ' And, when the outer circle of the workpiece to be tested abuts the two abutting points, the starting measuring point may be located on the inner circle of the workpiece to be tested. 'The final measuring point may be located at all points on the outer circle of the workpiece to be tested. And the measurement line marks the diameter of the corresponding outer circle of the tangent point.

In order to achieve the above-mentioned object, the present invention discloses a concentricity detection method, which uses-measuring tool detection-concentricity of a workpiece to be measured with an inner circle and an outer circle. The method includes: Two abutment points are arranged symmetrically on both sides to abut the workpiece to be measured; (b) the outer circle of the workpiece to be abutted on the two abutment points' and the axis of the outer circle intersects and is perpendicular to the measurement line; ⑷ Make a measuring point of the measuring tool abut the circumference of the inner circle, and make a final measuring point of the measuring tool abut all points on the circumference of the outer circle, and obtain the workpiece to be measured at the tangent point < The distance between the inner and outer circle; 旋 Rotate the positioning of the workpiece to be measured at a specific angle, so that the final measuring point abuts another tangent point of the outer circle, and the starting measuring point of the measuring tool abuts the inner circle. , And obtain the inner and outer circle spacing of the workpiece to be measured on another outer circle tangent point corresponding to the outer circle diameter; (e) Repeat the foregoing steps for the entire circumference of the outer circle to obtain a specific amount of different tangent points The inner and outer circle spacing values, and compare the inner and outer circle spacing values, Take out the maximum distance value and the minimum distance value; and (❾ Subtract the maximum distance value and the minimum distance value to obtain the concentricity. With the above detection method and measuring device, it will be applicable to various workpieces of different sizes, And its production cost is low, it is not limited by the space and environment of the place, it is suitable for general users, especially for online measurement, it only needs to occupy a little space. Moreover, it is easy to operate and can quickly measure concentricity Paper size applies to China National Standard (CNS) A4 specifications < 210 X 297 public love) A7 _____ — B7__ 5. Description of the invention (3) degree, and an accurate measurement can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a schematic perspective view of a concentricity measuring amount measuring device according to a preferred embodiment of the present invention. FIG. 2 shows a partially cut-away plan view of the measuring device shown in FIG. 1. FIG. 3 shows a perspective view of relevant parts when a workpiece to be measured is located at the measurement position of the measuring device shown in FIG. 1. FIG. 4 shows a schematic diagram of various measurement points of a workpiece to be measured. FIG. 5 shows a schematic perspective view of a concentricity detection device according to another preferred embodiment of the present invention. Description of Graphical Symbols 1, Γ Measuring device 10 Workpiece bearing unit 20, 20 'Workpiece abutment unit 30, 30' Round distance measuring unit 11 Bearing surface 12 Opening groove 21 Base 22 Upper cover seat 23 Container 24 abut Arm 25 Width adjustment mechanism 31 Base 32 Gage table 33 Lifting mechanism 34, 34 'Gage 35 · Sub-gage 25a, 33a Turn knob 25b, 33b Drive rod 25c, 33c Rack 32a End wall 34a} 34a' Vernier head 35a, outer wall An illustration of a better specific example printed by the Employees ’Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is shown in Figure 1 'A Concentric -6-1 paper scale adapted to Chinese National Standards (CNS) A4 specification (21G X 297 public love) '---------- V. Description of the invention (4) Degree detection and dosage measuring device 1 generally includes: a workpiece carrying unit 10, a workpiece abutting unit 20, and a circular distance measurement unit 30. The workpiece bearing unit 10 is in the shape of a bearing platform, which has a bearing surface U and an open slot 12 ′ on the bearing surface 11, which provides a vernier head 34 a on the measuring tool 34 of the circular distance measuring unit 30 described below. Move around the space during measurement. In addition, the bearing surface 11 is set so that when the workpiece to be measured is placed thereon, the axis of its outer circle will intersect and be perpendicular to the measuring line of the gage to be described later. The round distance measuring unit 30 includes a base 31, a measuring table 32, a measuring table lifting mechanism 33, and a measuring tool 34. The base 31 may be integrated with the workpiece carrying unit 10. The gage table 32 can be lifted and lowered relative to the base 31 through the lifting mechanism 33, and a slide groove (not labeled) for the gage 34 to slide and be fixed therein is provided above it, which faces one of the end walls 32a of the workpiece abutment unit 20. As a part for receiving the workpiece M to be measured (as shown in FIG. 3), and the outer tangent point contacting the outer circle of the workpiece μ to be measured constitutes a final measuring point, and the final measuring point is located at one of the measuring tools 34 Measure lines g-G (see Figure 2). The lifting mechanism 33 includes a turning button 33a '-a driving guard 33b fixed to the turning button 3 and attached with a driving gear, and two racks 33c fixed below the side wall of the measuring table 32; by the rotation of the turning button 33a The 'movement' will be able to adjust the height of the measuring table 32 relative to the bearing surface U, and the consumer cooperation of the staff of the Intellectual Property Bureau of the Ministry of Economic Affairs shall be adjusted according to the workpieces of different thicknesses to be measured. One of the protruding ends of the measuring tool 34 has a downward-moving vernier head 34a, a side of the measuring tool body is provided with a scale (not shown), and the vertical axis of the measuring tool 34 is aligned with the measurement line G_G (or may be parallel). For a hollow ring-shaped workpiece (as shown in Figure 3), the tangent point where the inner edge of the vernier head 34a contacts the inner circle of the workpiece to be measured can be used as a measuring point, and the starting point is also located on the measuring line G -G. In this way, is the end of the measuring table 32 _-7 _ I paper size suitable for rich countries ^ j-(_ CNS) A4 specifications (21Q x 297 Gongchu) ------- 'A7

This paper size applies to China National Standard (CNS) A4 (210 x 297 mm)

Among them, as described above, the outer circle of the workpiece M to be measured will abut against the end wall 32a of the measuring table 32 as the final measurement point, and the two clamping arms 24 of the abutment unit 20 clamp the workpiece to be measured M, so that the diameter of the outer circle of the workpiece M to be measured falls on the measurement line GG of the measuring tool 34. Then, when the inner edge of the vernier head 3 is brought into contact with the inner circle of the workpiece to be measured, the protruding end wall 32a of the measuring tool 34 can be used to measure the workpiece M to be measured by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The distance between the inner and outer circle on the corresponding diameter of the outer circle tangent point. According to the above usage method, when the measurement is completed—the workpiece to be tested in a specific orientation] ^ After the inner and outer circle spacing on the corresponding diameter of all points, loosen the two clamping arms 24 and rotate the workpiece to be measured M by a specific angle, for example At an angle of 15 degrees, the two clamping arms 24 clamp the outer circle of the workpiece to be measured μ, and measure the inner and outer circle distance on the outer circle of the workpiece to be measured at a corresponding diameter at another tangent point. In this way, the other tangent points on the outer circle of the workpiece to be measured are measured at the same angular intervals in sequence or selectively, and the distance between the inner and outer circles on the corresponding diameter is measured until the entire outer circle has an appropriately selected amount. Measured so far. When the distance between the inner and outer circle on the corresponding diameter of each tangent point on the circumference of the full outer circle is measured, the comparison is performed, and the maximum and minimum distance values are extracted; then, the maximum and minimum distance values are subtracted to obtain the value. Concentricity of the inner and outer circles of the workpiece M to be measured. In addition, the above comparison can also start the comparison after obtaining two points, while retaining the maximum and minimum values. In the following, the principle that the difference between the maximum and minimum values described above is the concentricity will be further explained. As shown in FIG. 4, assuming that the center of the outer circle of the workpiece M to be measured is a, its radius is R, the center of the inner circle is B, and its radius is r, then it is the measurement unit 30.

This paper size applies to Chinese National Standards < CNS) A4 Specifications < 21〇 x 297 mm (Please read the precautions on the back tCi first to write this page). Packing • I15J ·

C-line A7 EI 5. Explanation of the invention (the distance between the final measurement point and the starting measurement point, in addition, one, one, and suffix are the outer circle radius R, and the surface, Asia, and Yuan; and research is the inner circle radius r , 恧 is the diameter of the outer circle passing through the centers A and B (the radius of the outer circle is R), 歹 is the diameter of the inner circle passing through the centers A and B, and / _ is θ, and the length from the center a to the center B is a From the figure, we can get 1 = pass + response, and when Θ = 0, when θ = π, AP — AB + W AP '\ = AB + BP AP' ^ < R — (r — a) = QQ 'and because

PP AB + BF = r + a BP—AB = r—a ap-ap ^ \ ap \ ~ \ af

AP ----- r ---: ----- install --- (Please read the notes on the back to write this page first) AP AP- AP ^ > R- (r + a) = SS 'Therefore It can be tolerated, and then 20'-view = 2α = 2AS = max (two ^ As can be seen from the above push, after measuring the distance between P and p on all the outer diameters, i, the maximum value of which is reduced The minimum value is the value of concentricity t, and "practically" can optionally measure a number of points and subtract the minimum value from the maximum value of ^. Fig. 5 shows another method according to the present invention. A three-dimensional schematic diagram of a measuring device 1 ′ for detecting concentricity by a preferred embodiment. As shown in FIG. 5: The inside measuring device 1 includes a workpiece abutting early element 20 ′ and a measuring unit 3. 〇 ,. The measuring unit 30 'has an amount ^ 34' slidably fixed to the abutment unit 20, and a sub-measuring tool 35 which can slide on the measuring tool 34 '; one of the measuring tools 34' The protruding end has a vertically downward vernier head 34a. The inner and evening sides of the vernier head 3 can be used as the starting point according to whether the inner circle of the workpiece to be tested is hollow or solid; on the side wall of the measuring tool 34 ' And set up corresponding to the tour Header 3 such as, within, evening & Zhang scales are applicable to China National Standard (CNS) A4 specifications (210 X 297) The scale changed from the measurement point; the auxiliary measuring tool 35 can be moved according to the size of the workpiece M and the outer circle, so that the outer side wall 35a can abut the tangent point of the outer circle and serve as the final measurement The starting measuring point and the final measuring point form a measuring line G '-G1. The workpiece abutting unit 20 has a pair of abutting arms 24, and the measuring line G is symmetrically separated from the measuring unit 30 at equal intervals, _G, on both sides, its abutment surface opens outwards at equal angles to the measurement line G'-G 'and radially abuts the workpiece M' from the outer circle of the workpiece to be measured, so that it can adapt to various sizes of workpieces M to be tested With the measuring device shown in Figure 5, you can hold the workpiece to be measured, accurately measure the distance between the inner and outer circles on the corresponding diameter of each tangent point on the outer circle, and can arbitrarily change it as the tangent point of the final measurement point. Position, and then after recording the corresponding inner and outer circle spacing values at each tangent point position, you can follow The method will subtract the value of the large and minimum distances to obtain the concentricity. Although the above only uses a most basic and simple concentricity detection amount measuring device, and a bench-type concentricity that can hold the component to be tested The degree detection amount measuring device illustrates the technical idea of the present invention. However, it is understandable that as long as an appropriate mechanism is added, for example, under the framework of the first embodiment, various changes and adjustments are added to the automation mechanism, and the concentricity can be improved. Detection becomes easier and more automated; in addition, the distance between the inner and outer circles can be measured by various electronic or photoelectric methods, and the measured values can be recorded and then performed by an electronic circuit or microprocessor. Compare and reach the point of full automation. However, these developments must be built on the basic structure as described above. Therefore, the scope of protection of the present invention should include various diversions and applications of the scope of the attached patent application.

Claims (1)

A8 B8 C8 D8 Printed by Shelley Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 6. Scope of patent application 1. A concentricity measuring and measuring device for testing—inside and outside of the workpiece to be tested with an inner circle and _ an outer circle The concentricity of a circle includes: a circular distance measuring unit having a measuring tool, and the measuring tool has a measuring line and includes a measuring point and a final measuring point located on the measuring line; a workpiece contacting unit having two It is used to abut the contact points of the outer circle of the workpiece to be measured, and each abutment point is located at a symmetrical position on both sides of the measurement line, and where 'when the outer circle of the workpiece to be measured abuts the two abutment points, the The measuring point can be located on the inner circle of the workpiece to be measured, the final measuring point can be located on all points on the outer circle of the workpiece to be measured ', and the measuring line marks the corresponding outer circle diameter of the tangent point. 2. For example, the measuring device in the scope of the patent application also includes a workpiece bearing unit for fixing the workpiece abutting unit and the round distance measuring unit, and for carrying the workpiece to be tested at the two abutting points. And the outer circle axis of the workpiece to be measured intersects and is perpendicular to the measurement line. 3. For the measuring device of the scope of the patent application, the workpiece bearing unit has a workpiece bearing surface, and the round distance measuring unit further includes a lifting device for making the round distance measuring unit relative to the The workpiece bearing surface moves relatively. 4. For the measuring device of the scope of patent application, the workpiece abutment unit further includes two abutment arms and a abutment arm width adjustment mechanism, and the two abutment points are located on opposite surfaces of the two abutment arms. And the width adjusting mechanism is used to adjust the distance between the two abutting arms. 5. —A concentricity detection method, which uses a measuring tool to detect the concentricity of the inner and outer circles of the workpiece to be measured with an inner circle and an outer circle, including: ________ 1. -This paper is from a suitable country g | Family Standards (CNS ·) A4 ^ (2 books of 297)-Please read the notes of 1¾ first A8 B8 C8 D8 will be ordered VI. Patent application scope (a) Two symmetrical contact points on one side of one measuring line of the gage for abutting the workpiece to be tested; (b) Making the workpiece to be tested outside the circle Connect the two abutting points, and the axis of the outer circle intersects and is perpendicular to the measuring line; (c) Make a measuring point of the measuring tool abut the circumference of the inner circle, and make one of the final measuring points of the measuring tool abut the outer All points on the circumference of the circle, and obtain the inner and outer circle distance of the workpiece to be measured on the corresponding outer diameter of the tangent point; (d) Rotate the positioning of the workpiece to be measured at a specific angle, so that the final measuring point can reach Connect another tangent point of the outer circle circumference, and make the starting point of the measuring tool abut the inner circle circumference, and obtain the inner and outer circle distance on the corresponding outer circle diameter of the workpiece to be measured at another outer circle tangent point; ( e) Repeat the previous step 就 for the entire circumference of the outer circle, and obtain the inner and outer circle spacing values at a specific amount of different tangent points, and compare the inner and outer circle spacing values to extract the maximum and minimum spacing values; and ( f) Subtract the maximum spacing value from the minimum spacing value, and & Get concentric. ml * ^^ 1 .m nn — ^ nc (Please read the notes on the back before filling out this page) Order printed by the Intellectual Property Bureau Employee Consumer Cooperatives of the Ministry of Economics -13 Standards for papers in use in poor countries (CNS) A4 size (210x297 mm)