KR20100045816A - Measuring device for hole size and gap between holes - Google Patents

Abstract

PURPOSE: A measuring device for the size and interval of a hole is provided to increase the precision of a measured value and to increase the convenience of measurement by detecting the movement distance of each stage. CONSTITUTION: A measuring device for the size and interval of a hole comprises a three-axes stage(100), a first scale(140), a second scale(150), a measurement tip(160) and a processing unit(170). The three-axes stage is included of the X-axis stage unit, and the Y-axis stage unit and Z-axis stage unit. The first scale is installed in the X-axis stage unit and detects the translation distance of the X-axis stage unit. The second scale is installed in the Z-axis stage unit and detects the translation distance of the Z-axis stage unit. The measurement tip is connected to the Z-axis stage unit and measurement holder. The processing unit calculates interval between hole by using the barycentric coordinates of the holes.

Description

Measuring device for hole size and gap between holes}

The present invention relates to a device for measuring the size of the hole and the center distance between the holes, and more particularly, to a hole size and spacing measuring device that can easily and accurately measure the size of the hole formed on the same plane and the spacing between the holes.

In general, a number of holes are formed in a part in order to join the parts in the process of manufacturing a certain object, and thus the holes formed in the part may be smoothly coupled between parts only if they are processed to the precision required by the designer.

On the other hand, the diameter of the various holes formed in the part and the center distance between the holes are measured using Vernier Caliper, the most commonly used measuring tool, or dial gauge. Or can be measured using a three-dimensional measuring instrument. Of course, other methods may be used.

The vernier caliper has the advantage that it is relatively easy to measure the distance between the inner diameter of the hole and the hole, but there is a problem that the precision is significantly reduced compared to other measuring tools.

The dial gauge is a representative measuring tool using a comparative measuring method, and sets a reference value using a block gauge or a master gauge, and then measures the size or interval of the hole while moving the object or dial gauge on the surface plate. do. Such a dial gauge has the advantage of obtaining accurate measurement values if the measurement is carried out under ideal measuring conditions, but in practice, an error occurs in the process of moving the measurement object or the dial gauge on the surface plate, thereby decreasing the measurement accuracy. In addition, since the size and spacing of the holes cannot be measured directly, there is a problem that the measurement work is very cumbersome.

The three-dimensional measuring device is to measure the object using a sensor such as a displacement sensor, and can easily perform the measurement work, and the measurement value also has a very precise advantage, but the equipment is very expensive, especially small hole size When inserting the measuring tip into the hole to measure the size (eg 1.5 mm or less) or to measure the distance, an unexpected collision with the periphery of the hole occurs, which frequently causes damage to the sensor or other parts. There is a problem that the parts must be replaced frequently.

The present invention has been made in consideration of the above problems, an object of the present invention is to support the measuring tip using a three-axis stage, the measuring tip is moved in contact with the inside of the hole to be measured, the measuring tip is a hole The present invention provides a hole size and spacing measuring device that detects a distance operated by each stage from a position in contact with and measures a hole size or spacing, thereby providing convenience of measurement and increasing precision of a measured value.

The hole size and spacing measuring device of the present invention to achieve the object as described above and to perform the problem for eliminating the conventional defects comprises a three-axis stage consisting of an X-axis stage unit, a Y-axis stage unit and a Z-axis stage unit; A first scale mounted to the X-axis stage unit to detect a moving distance of the X-axis stage unit; A second scale mounted to the Z axis stage unit to detect a moving distance of the Z axis stage unit; A measurement tip connected by the Z-axis stage unit and the measurement holder and inserted into the hole of the measurement object to be in contact with the inner surface of the hole; And a signal corresponding to the distance traveled by the X-axis stage unit and the Z-axis stage unit from the first scale and the second scale when the measuring tip contacts each of the three different points in the hole. It is characterized by comprising a processing device to obtain a coordinate value, calculate the size and center coordinates of the hole using the coordinate values of the three points, and calculate the spacing between the holes using the center coordinates of each hole.

On the other hand, it is preferable that the weight balance for maintaining the weight balance with the Z-axis stage unit when the measuring tip is moved.

At this time, the weight balance has a weight equal to the Z-axis slider of the Z-axis stage unit, the weight disposed on the back of the Z-axis stage unit; At least one guide rod installed on a rear surface of the Z-axis stage unit to be parallel to a moving direction of the Z-axis slider to support movement of the weight; It may be mounted on a rotating support installed at the upper end of the Z-axis stage unit, one end of which is connected to a weight, and the other end of which may be composed of a rope connected to a Z-axis slider.

In addition, the measuring tip is screwed with the measuring holder is preferably configured to be easy to replace.

According to the present invention having the characteristics as described above, the user detects the center coordinates and the size of the hole by contacting the end of the measuring tip to any three points in the hole in the state that the user placed the tip inside the hole, By detecting the center coordinates and size of another hole, the size of the hole and the distance between the holes can be easily measured, thereby increasing the convenience of the measurement and increasing the accuracy of the measured value.

In addition, by using the weight balance, the Z-axis stage unit can be operated while maintaining the weight balance to prevent damage due to the collision of the measuring object or the measuring tip.

In addition, fast measurement and high precision can be obtained, thereby increasing productivity and increasing product reliability.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a perspective view of a measuring device according to a preferred embodiment of the present invention.

Measuring apparatus according to a preferred embodiment of the present invention is to allow easy and fast and accurate measurement of the size of the hole formed in the finished part in the process of manufacturing the various parts and the gap between the holes, the three-axis stage 100, The first scale 140, the second scale 150, the measuring tip 160, and the processing apparatus 170 are configured.

2 shows a perspective view of a triaxial stage according to the invention.

The three-axis stage 100 is to support the measuring tip 160, the user to freely move the measuring tip 160, the X-axis stage unit 110 and Y-axis stage unit 120 and It consists of the Z-axis stage unit 130. As shown in FIG.

Meanwhile, in the present embodiment, the X-axis stage unit 110 is located at the bottom, the Y-axis stage unit 120 is installed at the top thereof, and the Z-axis stage unit 130 is disposed at the top of the Y-axis stage unit 120. Although the installed structure is disclosed, the X-axis stage unit 110 and the Y-axis stage unit 120 may be installed in a different position.

The X-axis stage unit 110, the Y-axis stage unit 120, and the Z-axis stage unit 130 are manual stages operated by a force applied by a user, rather than being operated by electricity. Stage units (110, 120, 130) of the stage is composed of a slider that is coupled to the stage to move.

In more detail, the X-axis stage 111 constituting the X-axis stage unit 110 is installed to be fixed to the bed (Bed, 10) on which the 3-axis stage 100 is installed, and the X-axis slider 112 is Coupled to the X-axis stage 111 is installed to move in the X-axis direction. In addition, the Y-axis stage 121 constituting the Y-axis stage unit 120 is installed to be fixed to the upper portion of the X-axis slider 112 to move together with the X-axis slider 112, Y-axis slider 122 Is coupled to the Y-axis stage 121 is installed to move in the Y-axis direction. In addition, the Z-axis stage 131 constituting the Z-axis stage unit 130 is installed to be fixed to the bracket 133 placed on the upper portion of the Y-axis slider 122, and moves along with the Y-axis slider 122, The Z-axis slider 132 is installed to be coupled to the Z-axis stage 131 to move in the Z-axis direction.

In the present embodiment, only the basic configuration of each stage unit (110, 120, 130) has been described, but each stage unit may be provided with a high-precision guide, such as a cross roller guide, between the stage and the slider for precise operation. Since the stage unit constructed using the well-known technique widely known and widely used, a more detailed description of the stage unit will be omitted.

3 is a perspective view showing a state in which the first scale according to the present invention is installed in the X-axis stage unit.

The first scale 140 detects a distance that the X-axis slider 112 moves in the X-axis direction when the measuring tip 160 is moved by the user, and is parallel to the X-axis direction. X-axis scale 141 installed on the) and the X-axis slider 112 is installed in the X-axis slider 112 and moves along with the X-axis slider 112 through the X-axis slider 112 at the distance traveled It consists of an X-axis scale reader 142 which generates a corresponding signal. At this time, the X-axis scale reader 142 is provided on the X-axis slider 112 by the bracket 143.

4 is a perspective view showing a state in which the second scale according to the present invention is installed in the Z-axis stage unit.

The second scale 150 detects the distance that the Z-axis slider 132 moves in the Z-axis direction when the measuring tip 160 is moved by the user, and the Z-axis stage 131 to be parallel to the Z-axis direction. Z-axis scale 151 installed on the) and the Z-axis slider 132 is installed on the Z-axis slider 132 and moved along the Z-axis scale 151 through the Z-axis slider 132 at a distance moved Z-axis scale reader 152 for generating a corresponding signal. At this time, the Z-axis scale reader 152 is fixed to the Z-axis slider 132 by the bracket 153.

Since the first scale 140 and the second scale 150 as described above are well known techniques that are used in various industries to measure the length of an object or measure the moving distance, detailed descriptions thereof will be omitted.

5 is a cross-sectional view showing a state in which the measuring tip according to the present invention is installed.

The measuring tip 160 is inserted into the inside of the hole to be measured to be in contact with the inner surface of the hole, and is formed of a bar provided with a round sphere (ball, 161) at the end, the Z-axis slider 132 It is connected. Here, it is ideal to configure the tip of the measuring tip 160 as one infinitely small point, but in practice, it is impossible to configure the tip of the measuring tip 160 as infinitely small, so that the distance between the outer surface and the center is located. Irrespective of the same sphere (球, 161) is composed of the tip of the measuring tip 160.

Meanwhile, the measuring tip 160 is installed in the measuring holder 162 and the measuring holder 162 is installed in the Z-axis slider 132 so that the measuring tip 160 and the Z-axis slider 132 are connected. And, the operator is to move the measuring tip 160 in the state holding the measuring holder 162.

In this case, it is preferable that the measuring tip 160 and the measuring holder 162 are configured to be coupled by screwing, which is to reduce the maintenance cost by allowing only the measuring tip 160 to be replaced when the measuring tip 160 is damaged. It is to.

The processor 170 shown in FIG. 1 above receives a signal generated from the first scale 140 and the second scale 150 to calculate the size and center coordinates of the hole, and calculate the distance between the holes. It consists of the computer 171 and the user switch 172.

The user switch 172 is operated by the user when the tip of the measuring tip 160 is in contact with the inner surface of the hole, and when the user switch 172 is operated, the computer 171 operates the first scale 140 and the first scale 140. It is to process the signal transmitted from the 2 scale 150 to obtain the coordinate value for the position. In other words, the user switch 172 is provided with a button that can be pressed by the user. When the measuring tip 160 moves to contact any point of the inner surface of the hole, the user switches the button provided with the user switch 172. When pressed, the computer 171 processes the signals transmitted from the first scale 140 and the second scale 150 to obtain a coordinate value for the position where the measuring tip 160 is in contact.

The user switch 172 may further include a button having another function, such as a reset button for initializing the origin, in addition to the button.

The computer 171 calculates a hole size, a center coordinate, and an interval between the holes using coordinate values for each position obtained by processing signals input from the first scale 140 and the second scale 150. will be. As described above, the calculation of the size of the hole and the distance between the center coordinate and the hole is performed by a pre-written program. The process of calculating the size of the hole and the distance between the center coordinate and the hole using the obtained coordinate value is the measurement of the present invention. In the process of describing the measurement process using the device will be described in detail.

On the other hand, in the measuring device according to the present invention, since the user grasps the measuring holder 162 and moves the measuring tip 160 directly, each of the stage units 110, 120, and 130 may be smoothly measured only when natural operation is guaranteed.

Meanwhile, the X-axis stage unit 110 and the Y-axis stage unit 120 may ignore the influence of the slider's own weight by moving the slider on the horizontal plane, but in the case of the Z-axis stage unit 130, the Z-axis slider 132 ) Is moved by the weight of the Z-axis slider 132 when moving the measuring tip 160 in the vertical direction (Z-axis direction) in the vertical direction is difficult to precise position control is difficult.

Therefore, it is preferable that the weight balance 180 is provided to compensate for this.

6 is a perspective view showing a state in which the weight balance according to the present invention is installed.

The weight balance 180 is installed on the Z-axis stage unit 130 to maintain weight balance when the Z-axis slider 132 moves. The weight balance 180 is composed of a weight 181, a guide rod 182, and a rope 183.

The weight 181 is a block having the same weight as the Z-axis slider 132 and is disposed on the rear surface of the Z-axis stage unit 130.

The guide rod 182 is supported to not shake when the weight 181 moves. The guide rod 182 is installed on the rear surface of the Z-axis stage unit 130 so as to be parallel to the moving direction (Z-axis direction) of the Z-axis slider 132. 181 to support movement. Meanwhile, in the present embodiment, two guide rods 182 are provided, and a configuration in which two guide rods 182 provided are installed on the bracket 133 supporting the Z-axis slider unit 130 is disclosed.

The rope 183 connects the weight 181 and the Z-axis slider 132, one end of which is connected to the weight 181, and the other end of which is connected to the Z-axis slider 132. Meanwhile, in order to smoothly move the rope 183, a rotation support 184 having a wheel 185 for mounting the rope 183 is installed at the upper end of the Z-axis stage unit 130.

Using the measuring device of the present invention configured as described above to measure the size of the hole, it will be described for the process of measuring the distance between the holes.

Figure 7 is a perspective view showing a state of performing a measurement operation using the measuring device according to the present invention, Figure 8 is a view showing a state in which the measuring tip is inserted into the hole of the measurement object in contact with any one point of the inner surface, Figure 9 Shows a diagram in which the measuring tip is in contact with any three points in the hole.

In order to measure the size of the hole provided in the measuring object 20 or the distance between the holes, the measuring object 20 must be fixed, and the measuring jig 190 is used. The measuring jig 190 may be manufactured and used in various structures according to the shape or structure of the measurement object 20. However, when using the actual measuring device in the field is to measure any one iteratively, in actual use in consideration of the shape and structure of the product in order to fix the product to make a dedicated measuring jig 190 separately used The dedicated measuring jig 190 is installed together in the bed 10 in which the measuring device is installed.

As described above, the measuring jig 190 is manufactured and used to have various structures according to the shape or structure of the measuring object 20, and thus, a detailed description of the structure is omitted. In the following description, the measuring jig 190 is a measuring device. It is assumed that it is installed on the bed 10 together with the description.

In addition, the measurement process described below is for more clearly explaining the configuration of the measuring apparatus according to the present invention, and the measuring apparatus according to the present invention can be used limited to the measuring method to be described below.

First, the measurement object 20 is fixed to the measurement jig 190.

When the measurement object 20 is fixed as described above, the user grasps the measurement holder 162 and the sphere 161 provided at the end of the measurement tip 160 is inserted into the hole 21 to be measured. The measuring tip 160 is moved to be in contact with any one point of the inner surface of the hole 21. As such, when the measuring tip 160 contacts the inner surface of the hole, the user presses a button provided on the user switch 172, and the computer transmits a signal transmitted from the first scale 140 and the second scale 150. The coordinates of the position can be obtained by processing the coordinates, and these coordinates can be expressed as a point P1 (X1, Z1) on the XZ flatness.

That is, when the user moves the measuring tip 160 to contact the inner surface of the hole, the first scale 140 and the second scale 150 are located at the distance that the measuring tip 160 moves from the origin set in the measuring device. In this case, the computer 171 processes the signal transmitted from the first scale 140 to obtain a value corresponding to the X coordinate, and processes the signal transmitted from the second scale 150 to process the Z coordinate. By obtaining a value corresponding to, it is possible to obtain a coordinate value for a point P1 (X1, Z1) in the hole.

Thereafter, the user moves the measuring tip 160 to contact the measuring tip 160 with another point in the hole, and then presses a button provided in the user switch 172 again, thereby causing the second point P2 (X2, Z2). It is possible to obtain a coordinate value for. By repeating this again, the measuring tip 160 is contacted with another point in the hole, and then by pressing the button of the user switch 172, the third point P3 (X3, Z3) is obtained. You can get the coordinate value for.

As described above, by processing the signal transmitted from the first scale 140 and the second scale 150 to the position information for the three different points in the hole three points P1 (X1, Z1), P2 (X2, Z2), When the coordinate values for P3 (X3, Z3) are input to the computer 171, the computer 171 calculates the center coordinates and the size of the corresponding hole.

On the other hand, using the three coordinate values P1 (X1, Z1), P2 (X2, Z2), P3 (X3, Z3) to obtain the size and center coordinates of the circle can be made by a variety of methods, below Briefly explain the method using the equation.

First, the circle equation is obtained by substituting the unknown values A, B, and C by substituting the coordinate values P1 (X1, Z1), P2 (X2, Z2), P3 (X3, Z3) of each point into the general form of the circle equation below. To complete the

--- 원의방정식 일반형

--- Circle Equation General

By converting the general form of the completed circle equation to the standard form, the center coordinate and size (radius) of the hole can be known.

--- 원의방정식 표준형

--- Circle Equation Standard

In the circle equation standard above, a and b are the center coordinates of the hole, and R is the radius of the hole.

The theoretical center of the hole and the size of the hole can be theoretically calculated using the circle equation and three coordinate values as above, but in the case of the hole size, the size of the sphere 161 provided at the end of the measuring tip 160 is determined. Since the actual size of the hole must be reflected, the radius R of the sphere 161 can be calculated by adding the radius R of the circle 161 obtained by the above theory.

On the other hand, if the user wants to measure another hole 22, the user moves the measuring tip 160 to another hole 22 and repeats the above-described process so that the computer 171 can obtain the position information for three different points in the hole. ), And the computer 171 calculates the center coordinates and the size of the hole 22.

In the above process, the number of holes corresponding to the number of holes to be measured is performed. Since the center coordinates of each hole are known through this process, the distance between the two holes can be calculated using the center coordinates of each hole. Will be.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is a perspective view of a measuring device according to a preferred embodiment of the present invention;

2 is a perspective view of a three-axis stage according to the present invention,

3 is a perspective view showing a state in which the first scale according to the present invention is installed on the X-axis stage unit,

4 is a perspective view showing a state in which the second scale is installed in the Z-axis stage unit according to the present invention;

5 is a cross-sectional view showing a state in which the measuring tip is installed according to the present invention,

6 is a perspective view showing a state in which the weight balance according to the present invention is installed,

7 is a perspective view showing a state in which the measurement operation using the measuring device according to the present invention;

8 is a view showing a state in which the measuring tip is inserted into the hole of the measurement object to contact any point on the inner surface;

9 is a view showing a state where the measuring tip is in contact with any three points in the hole.

<Explanation of symbols for the main parts of the drawings>

(100): 3-axis stage 110: X-axis stage unit

120: Y-axis stage unit 130: Z-axis stage unit

140: first scale 150: second scale

(160): measuring tip (162): measuring holder

(170): processing unit (180): weight balance

(181): weight (182): guide rod

(183): Rope 184: Revolving Support

Claims (4)

A three-axis stage 100 composed of an X-axis stage unit 110, a Y-axis stage unit 120, and a Z-axis stage unit 130; A first scale 140 installed in the X-axis stage unit 110 to detect a moving distance of the X-axis stage unit 110; A second scale (150) installed in the Z-axis stage unit (130) to detect a moving distance of the Z-axis stage unit (130); A measuring tip 160 connected by the Z-axis stage unit 130 and the measuring holder 162 and inserted into a hole of the measuring object 20 to be in contact with an inner surface of the hole; And When the measuring tip 160 is in contact with three different points in the hole, respectively, the X-axis stage unit 110 and the Z-axis stage unit 130 from the first scale 140 and the second scale 150 Receives a signal corresponding to the distance traveled, obtains coordinate values for three points, calculates the size and center coordinates of the hole using the coordinate values of the three points, and calculates the distance between the holes using the center coordinates of the holes. Hole size and spacing measuring device, characterized in that consisting of a processing unit (170). The method of claim 1, Hole size and spacing measuring device, characterized in that the weight balance 180 is further provided for maintaining the weight balance with the Z-axis stage unit 130 when the measuring tip (160) moves. The method of claim 2, wherein the weight balance 180, A weight 181 having the same weight as the Z-axis slider 132 of the Z-axis stage unit 130 and disposed on a rear surface of the Z-axis stage unit 130; At least one guide rod 182 mounted on a rear surface of the Z-axis stage unit 130 to be parallel to a moving direction (Z-axis direction) of the Z-axis slider 132 to support movement of the weight 181; It is mounted on the rotary support 184 installed on the upper end of the Z-axis stage unit 130, one end is connected to the weight 181, the other end is characterized by consisting of a rope 183 connected to the Z-axis slider 132 Hole size and thickness measuring device. The method of claim 1, The measuring tip 160 is screwed with the measuring holder 162, the hole size and spacing measuring device, characterized in that configured for easy exchange.

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