CN203349787U - Measurement jig and projection measurement instrument - Google Patents

Abstract

A measurement jig comprises a positioning clamp and a measurement jig body. The positioning clamp comprises a first positioning edge and a second positioning edge which are mutually perpendicular. The measurement jig body is provided with a groove which is provided with a plurality of measurement areas. The bottom of the groove is in mesh hollow-out shape. A plurality of raised steps protrude on the side walls of the groove. Two adjacent edge frames are mutually perpendicular and two oppositely-arranged edge frames are parallel. The first positioning edge is parallel with the two oppositely-arranged edge frames. The second positioning edge is parallel with the other two oppositely-arranged edge frames. The measurement jig is capable of measuring the dimensions of a plurality of glass simultaneously; positioning is done easily; and measurement error is reduced. Meanwhile, a projection measurement instrument applying the measurement jig is provided.

Description

Measuring Fixtures and Projection Measuring Instruments

technical field

The utility model relates to an auxiliary tool, in particular to a measuring fixture for assisting in measuring the size of glass and a projection measuring instrument using the measuring fixture.

Background technique

The measurement of glass cutting size is an indispensable link in the glass processing process. It is a relatively mature process to measure the glass size with a 3D projection measuring instrument. The 3D projection measuring instrument can intelligently detect the edge of the glass (the edge of the glass must ensure light transmission), and the size of the glass can be calculated by calculating the coordinate interval between the edges.

As shown in FIG. 1 , taking a regular rectangular glass 100 as an example, the size of the glass is measured using a 3D projection measuring instrument. The coordinates of a certain point A on the first edge of the glass 100 are (a, b), the coordinates of a certain point B on the second edge of the glass 100 are (c, d), and the coordinates of a certain point B on the third edge of the glass 100 The coordinates of C are (e, f); the coordinates of a point D on the fourth edge of the glass are (g, h). Then the measured data is calculated: the width of the glass 100 is a-e (the first edge abscissa value minus the third edge abscissa value), and the length of the glass 100 is d-h (the second edge ordinate value minus the fourth edge ordinate value).

Irregular glass can also be measured with a 3D projection measuring instrument, but the measurement of irregular glass is more complicated: the edge of irregular glass may be neither parallel to the X coordinate axis nor parallel to the Y coordinate axis, and for neither The side where the X axis is not parallel to the Y axis can take two points on this side, and the position of a straight line can be determined according to the two points.

However, when measuring the size of glass traditionally, the glass is usually placed directly on the measuring table of the 3D projection measuring instrument, and then a piece of glass is replaced after the measurement. Only the size of one piece of glass can be measured at a time, and the measurement efficiency is low. It is difficult to accurately locate the glass, and it is easy to cause large errors in projection.

Utility model content

Based on this, it is necessary to provide a measuring jig that can measure multiple glasses at one time and reduce errors for the problem that only one piece of glass can be measured at a time and errors are prone to occur when measuring the size of glass.

A measuring fixture, comprising:

A positioning card, the positioning card includes a first positioning edge and a second positioning edge perpendicular to each other; and

The main body of the measuring fixture has a plate-like structure. A groove is opened on one side of the main body of the measuring fixture, and the groove can accommodate the glass to be measured. Multiple measuring areas are formed in the groove, and the multiple measuring areas Located on the same plane, the bottom of the groove is in the shape of a grid hollow, and the side walls of the groove protrude to form a plurality of raised steps, and the plurality of raised steps are arranged at intervals; perpendicular to the side of the groove The wall extends toward the edge of the main body of the measurement fixture to form a frame, the two opposite frames are parallel to each other, and the two adjacent frames are perpendicular to each other;

Wherein, the first positioning side is parallel to two opposite frames in the measuring fixture main body, and the second positioning side is parallel to the other two opposing frames in the measuring fixture main body.

In one of the embodiments, the first positioning side and the second positioning side are provided with a first positioning part near the periphery of the frame, and the periphery of the frame is provided with a second positioning part matching the first positioning part. positioning department.

In one of the embodiments, the first positioning part is a protrusion provided on the first positioning side and the second positioning side, the second positioning part is a positioning groove opened on the periphery of the frame, and the protrusion Match the positioning groove.

In one of the embodiments, the grid density of the groove bottom corresponding to the edge of the measurement area is smaller than the grid density of the groove bottom corresponding to the middle of the measurement area.

In one embodiment, the grid at the bottom of the groove is a random grid.

In one embodiment, the raised step is a triangular step, and the apex of the triangle faces the groove.

In one of the embodiments, a fixing hole is opened on the frame of the main body of the measuring fixture.

In one of the embodiments, the positioning card is an aluminum alloy positioning card, and the measuring fixture body is an aluminum alloy measuring fixture body.

A projection measuring instrument, comprising a probe head, a measuring table and the above-mentioned measuring fixture, the probe head is facing the measuring table, the positioning card is fixed on the measuring table, and the measuring fixture main body It is replaceably arranged on the measuring platform.

In one of the embodiments, the main body of the measuring fixture is replaceably arranged on the measuring platform through fasteners.

The above-mentioned measuring fixture and the projection measuring instrument using the measuring fixture have grooves on one side of the main body of the measuring fixture, and a plurality of measurement areas on the same plane are formed in the grooves. When using the 3D projection measuring instrument to measure glass When measuring the size, multiple pieces of glass can be placed in multiple measurement areas at the same time to measure the size of the glass; and the two frames opposite to the main body of the measurement fixture are parallel to each other, and the adjacent two frames are perpendicular to each other, and they are respectively aligned with the positioning The first positioning side of the card is parallel to the second positioning side. During the measurement, the positioning card is fixed on the measuring platform, which is conducive to accurate positioning when the measuring fixture body is placed on the measuring platform; and the bottom of the groove is hollowed out, so The light transmission of the fixture is guaranteed, which is conducive to clear projection; the purpose of setting multiple raised steps is to reduce the contact area between the glass to be measured and the measurement fixture, and at the same time improve the light transmission of the edge of the glass to be measured, which is conducive to Improve measurement accuracy and reduce measurement errors.

Description of drawings

Fig. 1 is the schematic diagram of measuring regular glass in the background technology;

Fig. 2 is a schematic structural view of a measuring fixture in an embodiment;

FIG. 3 is a schematic structural view of the measurement fixture body shown in FIG. 2 for simultaneous measurement of multiple pieces of glass.

Detailed ways

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below .

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 2 and FIG. 3 , which illustrate a measurement fixture 200 in an embodiment. The measuring fixture 200 includes a positioning card 210 and a measuring fixture main body 220 .

The positioning card 210 includes a first positioning edge 212 and a second positioning edge 214 perpendicular to each other. When measuring the size, the positioning card 210 is fixed on the measuring table. Taking the X-axis and Y-axis in the two-dimensional coordinate system as references on the measuring platform, when the positioning card 210 is fixed on the measuring platform, the first positioning side 212 is parallel to the X-axis, and the second positioning side 214 is parallel to the Y-axis.

The measuring fixture main body 220 is a plate-shaped structure. It can roughly be a cuboid or a cube. The measuring jig body 220 is a single and complete measuring jig body 220 , omitting assembly steps and avoiding assembly errors. A groove 222 is defined on one side of the measuring fixture body 220 , and the groove 222 is located in the middle of the measuring fixture body 220 . The groove 222 is used to accommodate the glass 300 to be measured.

A plurality of measurement areas 222a are formed in the groove 222, and in this embodiment, four measurement areas 222a are taken as an example for illustration. Of course, in other embodiments, it can also be set as two, three, five measurement areas 222a and so on. The plurality of measurement areas 222a are located on the same plane.

As shown in FIG. 2, the four measurement areas 222a are respectively a first measurement area, a second measurement area, a third measurement area and a fourth measurement area. The areas occupied by the measurement areas 222a may be equal or unequal. Specifically in this embodiment, the areas occupied by each measurement area 222a are equal. The four measurement areas 222a are located on the same plane, and the flatness of the groove 222 is guaranteed to be good. As shown in FIG. 3 , when measuring the glass 300 to be tested, four pieces of glass 300 to be tested can be placed in any one of the four measurement areas 222 a. In other embodiments, a piece of glass with a larger size, such as 5-17 inches of glass, can also be measured at one time.

A frame 224 is formed perpendicular to the sidewall of the groove 222 and extending toward the edge of the measuring fixture 200 , two opposite frames 224 are parallel to each other, and two adjacent frames 224 are perpendicular to each other. Wherein, the first positioning side 212 is parallel to the two opposite frames 224 in the measuring fixture main body 220 , and the second positioning edge 214 is parallel to the other two opposing frames 224 in the measuring fixture main body 220 . When the measuring jig main body 220 is placed on the measuring table of the 3D projection measuring instrument, the two adjacent frames 224 abut against the first positioning side 212 and the second positioning side 214 respectively, so as to ensure that the frame of the measuring jig main body 220 224 are parallel to the X-axis and the Y-axis, respectively.

2 and 3, the first positioning side 212 and the second positioning side 214 are provided with a first positioning portion 21 near the periphery of the frame 224, and the periphery of the frame 224 is provided with a second positioning portion 21 that matches the first positioning portion 21. Two positioning parts 22. When measuring the size of the glass 300 , the first positioning portion 21 matches the second positioning portion 22 , which facilitates the positioning of the measuring jig body 220 . Specifically, the first positioning portion 21 can be a protrusion protruding from the first positioning edge 212 and the second positioning edge 214, the second positioning portion 22 is a positioning groove opened on the periphery of the frame 224, and the positioning groove matches the protrusion. It is more convenient to position the measuring fixture body 220 . Of course, in other embodiments, the first positioning part 21 may also be a positioning groove opened on the first positioning side 212 and the second positioning side 214, and the second positioning part 22 may be a protrusion protruding from the periphery of the frame 224, and the protrusion match the positioning groove, and position the measuring jig body 220.

The bottom of the groove 222 is hollowed out with a grid, and the grid can be a regular grid, such as a square grid, a rectangular grid or a circular grid. As shown in Figure 2, it can also be an irregular random grid. The purpose of setting the bottom of the groove 222 in a grid hollow shape is to ensure the light transmission of the measuring fixture 200 , so as to realize accurate and clear projection.

As shown in FIG. 2 , the grid density at the bottom of the groove 222 corresponding to the edge of the measurement area 222 a is smaller than the grid density at the bottom of the groove 222 corresponding to the middle of the measurement area 222 a. Because the 3D projection measuring instrument mainly enlarges the projection of the glass 300 to be tested, and then measures the point value of the edge of the glass 300 to be tested, and then calculates the size, so it is necessary to ensure that the edge of the glass 300 has good light transmission. The smaller the mesh density, the better the light transmission; the larger the mesh density, the worse the light transmission. Therefore, the grid density at the bottom of the groove 222 corresponding to the edge of the measurement area 222a is smaller than the grid density at the bottom of the groove 222 corresponding to the middle of the measurement area 222a, which is beneficial to increase the light transmittance of the edge of the glass 300 to be tested. When the grid density at the bottom of the groove 222 corresponding to the middle part of the measurement area 222a is relatively high, better supporting force can be provided. Of course, in other embodiments, the grid density at the bottom of the groove 222 corresponding to the edge portion of the measurement area 222a is equal to the grid density at the bottom of the groove 222 corresponding to the middle portion of the measurement area 222a, and the density is smaller. The light transmittance of the edge of the glass 300 to be tested can be guaranteed.

As shown in FIG. 2 , the sidewall of the groove 222 protrudes to form a plurality of raised steps 222 b. When the glass 300 to be tested is placed in the groove 222 , the side of the glass 300 is in contact with the sidewall of the groove 222 . Because the 3D projection measuring instrument mainly enlarges the projection of the glass 300 to be tested, and then obtains the size of the glass 300 to be tested by taking point values at the edge of the glass 300, and then calculates the size of the glass 300 to be tested, so it is necessary to ensure that the edge of the glass 300 has good light transmission . Therefore, a plurality of raised steps 222 b are provided on the sidewall of the groove 222 to increase the light transmittance when the edge of the glass 300 contacts the sidewall of the groove 222 .

Specifically, the protruding step 222b may be a triangular step, and the apex of the triangle faces the groove 222 . When the raised step 222b is set as a triangular step, when the edge of the glass 300 is in contact with the sidewall of the groove 222, it only touches the apex of the triangle, which further increases the light transmittance of the edge of the glass 300. At the same time, the contact area between the edge of the glass 300 and the side wall of the groove 222 is reduced, the glass 300 is not easy to move, the measurement accuracy is improved, and batch defects are avoided. Certainly, in other embodiments, it may also be wedge-shaped steps or steps of other shapes.

Specifically in this embodiment, the frame 224 of the measuring fixture body 220 is provided with fixing holes. The measuring jig body 220 can be fixed on the measuring platform by passing fasteners such as screws through the fixing holes.

Specifically in this embodiment, the positioning card 210 is an aluminum alloy positioning card, and the measuring fixture body 220 is an aluminum alloy measuring fixture body. Aluminum alloy has low density, but relatively high strength and is easy to process. When manufacturing the measuring jig 200 , it is easy to process and reduces the manufacturing difficulty of the measuring jig 200 . The aluminum alloy has high strength, and the measuring jig 200 is not easily deformed. Of course, in other embodiments, other materials may also be used.

For the measuring fixture 200 mentioned above, when measuring the size of the glass 300, the positioning card 210 is fixed on the measuring table, and the first positioning edge 212 and the second positioning edge 214 are respectively parallel to the X axis and the Y axis, and the measuring fixture main body 220 It is replaceably fixed on the measuring platform, and makes two adjacent frames 224 abut against the first positioning side 212 and the second positioning side 214 respectively. Because a groove 222 is provided on one side of the measuring fixture main body 220, and a plurality of measurement regions 222a are formed in the groove 222, and the plurality of measurement regions 222a are located on the same plane, when measuring the size of the glass 300 using a 3D projection measuring instrument, it can be simultaneously Multiple pieces of glass 300 are respectively placed in multiple measurement areas 222a to measure the size of the glass 300, which improves the measurement efficiency. The relative frames 224 of the measurement fixture body 220 are parallel to each other, the adjacent frames 224 are perpendicular to each other, and the two adjacent frames 224 are respectively abutted against the first positioning edge 212 and the second positioning edge 214, which is conducive to measuring the fixture When the body 220 is placed on the 3D projection measuring instrument, it is parallel to the X-axis and the Y-axis respectively, so that the positioning is precise and the measurement error is reduced. Moreover, the bottom of the groove 222 is hollowed out, thus ensuring the light transmission of the measuring fixture 200 and facilitating accurate measurement of the size of the glass 300 . The purpose of setting a plurality of raised steps 222b is to reduce the contact area between the glass 300 to be measured and the measuring jig 200, and at the same time improve the light transmittance of the edge of the glass 300 to be measured, which is beneficial to improve the measurement accuracy. And the measuring jig 200 is simple and practical, light and convenient, and low in cost.

A projection measuring instrument includes a probe head, a measuring table and a measuring fixture 200. The probe head is facing the measuring platform, and projects the object placed on the measuring platform. The positioning card 210 is always fixed on the measuring table when measuring the size of the glass 300 , and the measuring fixture main body 220 is replaceably arranged on the measuring table. Specifically, it can be replaceably arranged on the measuring platform by fasteners such as screws.

When the above-mentioned projection measuring instrument is in operation, first place the plurality of pieces of glass 300 to be measured in the plurality of measurement areas 222a of the measuring fixture main body 220, and ensure that the sides of the glass 300 to be measured are in close contact with the side walls of the groove 222. Close contact, and then the measuring fixture body 220 is fixed on the measuring table through the fixing hole through the screw, and the detection head scans and projects the glass 300 times, and obtains the dimensions of multiple pieces of glass 300 through calculation. After measuring the dimensions of the multiple pieces of glass 300 on the measuring jig body 220, the measuring jig body 220 is unloaded, and then another measuring jig body 220 that prevents multiple pieces of glass to be measured is placed on the measuring platform for measurement .

Because the above-mentioned projection measuring instrument uses the measuring fixture 200, the dimensions of multiple pieces of glass can be measured at one time, the measuring efficiency is improved, and the measuring error is reduced.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (10)

1. A measuring fixture, characterized in that, comprising: A positioning card, the positioning card includes a first positioning edge and a second positioning edge perpendicular to each other; and The main body of the measuring fixture has a plate-like structure. A groove is opened on one side of the main body of the measuring fixture, and the groove can accommodate the glass to be measured. Multiple measuring areas are formed in the groove, and the multiple measuring areas Located on the same plane, the bottom of the groove is in the shape of a grid hollow, and the side walls of the groove protrude to form a plurality of raised steps, and the plurality of raised steps are arranged at intervals; perpendicular to the side of the groove The wall extends toward the edge of the main body of the measurement fixture to form a frame, the two opposite frames are parallel to each other, and the two adjacent frames are perpendicular to each other; Wherein, the first positioning side is parallel to two opposite frames in the measuring fixture main body, and the second positioning side is parallel to the other two opposing frames in the measuring fixture main body. 2. The measuring jig according to claim 1, wherein a first positioning portion is provided on the periphery of the frame near the first positioning edge and the second positioning edge, and the periphery of the frame is provided with a The second positioning part that matches the first positioning part. 3. The measuring fixture according to claim 2, wherein the first positioning part is a protrusion provided on the first positioning side and the second positioning side, and the second positioning part is set on the The positioning groove on the periphery of the frame, the protrusion matches the positioning groove. 4 . The measuring fixture according to claim 1 , wherein the grid density of the groove bottom corresponding to the edge of the measurement area is smaller than the grid density of the groove bottom corresponding to the middle of the measurement area. 5. The measuring fixture according to claim 1, wherein the grid at the bottom of the groove is a random grid. 6 . The measuring fixture according to claim 1 , wherein the raised step is a triangular step, and the apex of the triangle faces the groove. 7 . 7. The measuring fixture according to claim 1, wherein a fixing hole is opened on the frame of the main body of the measuring fixture. 8. The measuring fixture according to claim 1, wherein the positioning card is an aluminum alloy positioning card, and the main body of the measuring fixture is an aluminum alloy measuring fixture body. 9. A projection measuring instrument, characterized in that it comprises a probe head, a measuring table and the measuring fixture as claimed in any one of claims 1 to 8, the probe head is facing the measuring table, and the positioning The card is fixed on the measuring table, and the measuring jig main body is replaceably arranged on the measuring table. 10 . The projection measuring instrument according to claim 9 , wherein the measuring jig main body is replaceably arranged on the measuring platform through fasteners. 11 .

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