CN216846195U

CN216846195U - Three-coordinate test fixture and three-coordinate measuring instrument

Info

Publication number: CN216846195U
Application number: CN202220647708.6U
Authority: CN
Inventors: 胡宗辉; 夏俭丽
Original assignee: Shanghai Yishang New Energy Technology Co ltd
Current assignee: Hunan Gengchi New Energy Technology Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-06-28
Anticipated expiration: 2032-03-24

Abstract

The utility model discloses a three-dimensional test fixture belongs to three-dimensional test instrument auxiliary fitting technical field. The jig comprises a supporting plate with a certain thickness, wherein the supporting plate is provided with a working area, and a plurality of measuring holes are formed in the preset position of the working area along the orthographic projection profile; the measuring hole is used for providing a moving space of the contact type probe in measuring, so that the probe head of the probe can move to a position below the bottommost surface of an object to be measured for measuring. The horizontal height of an object to be measured can be lifted by the supporting plate, meanwhile, the supporting plate is provided with the plurality of measuring holes, during measurement, a part needing to be measured is in a suspended state, the probe of the probe can move to a position below the bottommost surface of the part to be measured to measure, the limitation of the thickness of the object to be measured is avoided, each measuring point can be guaranteed to obtain an accurate coordinate value, and the range of the plate which can be measured by the three-coordinate measuring instrument is further improved. The utility model also discloses a three-coordinate measuring apparatu that contains above-mentioned tool.

Description

Three-coordinate test fixture and three-coordinate measuring instrument

Technical Field

The utility model relates to a three-coordinate test instrument auxiliary fitting technical field especially relates to a three-coordinate test fixture and three-coordinate measuring apparatu.

Background

The coordinate measuring instrument is a precise instrument for measuring the outline of an object, and the working process and the principle are as follows: the three-coordinate measuring instrument is widely applied to the industries of automobiles, electronics, machinery, automobiles, aviation, military industry, molds and the like.

The measurement principle of the above-mentioned measuring instrument is essentially a probe contact type, the probe is small but still has a certain volume, for example a spherical probe (as shown in fig. 1) with a diameter R, and the equatorial position (one full circle) of the probe is the best contact point. The instrument has certain requirements on the thickness of a part 10' to be measured, and if an object to be measured is too thin and is lower than the diameter R of the probe or the lowest detection threshold value, the accuracy of a measurement result cannot be ensured, so that three-coordinate contact type measurement cannot accurately measure the object which is too thin, and the application range of a three-coordinate measuring instrument is limited.

In view of the above, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three-coordinate test fixture and three-coordinate measuring instrument for solve current three-coordinate measuring instrument because the unsafe problem of measuring result that the object that awaits measuring leads to is too thin, let the probe of probe remove the position below the bottommost face of the object that awaits measuring and measure, thereby ensure measuring result's accuracy.

In order to achieve the above object, the utility model adopts the following technical means:

a three-coordinate test fixture is placed on a working table top of a three-coordinate measuring instrument and is matched with a contact probe to measure an object to be measured, and the three-coordinate test fixture comprises a supporting plate with a certain thickness, wherein the supporting plate is provided with a working area, the working area is matched with an orthographic projection profile of the object to be measured, and a plurality of measuring holes are formed in the preset position of the working area along the orthographic projection profile;

the measuring hole is used for providing a moving space for the contact probe during measurement, so that the probe of the probe can move to a position below the bottommost surface of an object to be measured for measurement.

As a further improvement, the device also comprises a cover plate, and the cover plate is used for pressing the upper surface of the object to be measured during measurement so as to prevent the object to be measured from horizontally displacing.

As a further improvement, the cover plate has the same shape and contour as the support plate, and the cover plate is correspondingly provided with avoidance holes at positions corresponding to the measuring holes.

As a further improvement, the supporting plate and the cover plate are both rectangular, the outline of the working area is rectangular, and the measuring holes are arranged along the rectangular outline.

As a further improvement, the measuring holes and the avoiding holes are all arranged to be strip-shaped holes, and the width of each strip-shaped hole is 10 mm.

As a further improvement, the thickness of the supporting plate is larger than or equal to the radius of the probe.

As a further improvement, the thickness of the supporting plate is 15mm, and the thickness of the cover plate is 10 mm.

As a further improvement, the device also comprises a horizontal clamp which is used for clamping the object to be measured between the supporting plate and the cover plate.

As a further improvement, the supporting plate is made of steel, and the cover plate is made of aluminum.

A three-coordinate measuring instrument comprises a working table, a contact probe and the three-coordinate testing jig, wherein a measuring space is arranged above the working table, and the contact probe can freely move in the measuring space;

during measurement, the three-coordinate test fixture is horizontally placed on the working table surface, and an object to be measured is positioned on the three-coordinate test fixture; and when the contact probe is contacted with the object to be detected according to the preset position, the space coordinate where the contact point is located is fed back.

Compared with the prior art, the utility model discloses bring following technological effect:

the utility model discloses a three-coordinate test fixture comprises a supporting plate, the supporting plate can lift the horizontal height of an object to be measured, and a plurality of measuring holes are arranged on the supporting plate, so that a probe can conveniently stretch into the supporting plate to measure the object to be measured; during measurement, a part to be measured is in a suspended state, the probe of the probe can move to a position below the bottommost surface of the part to be measured, so that the limitation of the thickness of an object to be measured is avoided, each measuring point can obtain accurate coordinate values, and the range of the plate which can be measured by the three-coordinate measuring instrument is further enlarged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram illustrating a measurement state of a probe and an object to be measured according to the prior art;

fig. 2 is a schematic diagram illustrating a state of placing an object to be tested on the three-coordinate testing jig of the present invention;

FIG. 3 shows a cross-sectional view of the state of FIG. 2;

FIG. 4 is a schematic view of a three-dimensional testing fixture according to another preferred embodiment of the present invention;

FIG. 5 shows a cross-sectional view of the state of FIG. 4;

FIG. 6 shows an exploded view of the three-coordinate test fixture of FIG. 4 in space;

FIG. 7 is a schematic view showing a measuring state of a three-coordinate testing fixture according to a third preferred embodiment of the present invention;

fig. 8 shows a schematic view of the horizontal clamp of fig. 7.

Description of the main element symbols:

an object to be measured-W; a countertop-98; contact probe-90; a probe-91; a support plate-100; a measuring hole-101; a cover plate-200; a dodging hole-201; positioning hole-202; a guide post-300; horizontal clamp-400; a fixed seat-401; clamp arm assembly-402; -a regulating component-403; a U-shaped connecting part-404; a handle-405; a connecting piece-406; a clamp arm-407; y-shaped connecting part-408; a positioning sleeve-409; a screw-410; adjusting nut-411; rubber pad-412.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 2-3, the present invention provides a three-dimensional testing jig, which is applied to the existing three-dimensional measuring apparatus for positioning the object W to be measured and ensuring the accuracy of the measuring result. The main structural component of the coordinate measuring machine is a contact probe 90, the contact probe 90 can move freely in a certain three-dimensional space range, the lowest end of the probe 90 is connected with a probe 91, and one probe 91 is spherical. A working table surface 98 is arranged on the three-coordinate measuring instrument, and a measuring space is arranged above the working table surface 98, namely, the space in which the probe 90 can freely move; the worktable surface 98 is used for placing an object W to be measured, and contacts the surface of the object W to be measured through the probe 91 to trigger a signal, so as to record the space coordinate of the contact point; by analogy, data related to the shape, the size and the like of the object W to be detected can be obtained by collecting the space coordinates of a large number of contact points and then by using specific analysis software.

The utility model discloses three-coordinate test fixture places on three-coordinate measuring instrument's table surface 98 when using, and cooperation contact probe 90 measures the object W that awaits measuring.

The three-coordinate test fixture comprises a supporting plate 100 with a certain thickness, wherein the supporting plate 100 is provided with a working area (not marked in the figure), the working area is matched with the orthographic projection profile of an object W to be tested, and a plurality of measuring holes 101 are arranged at preset positions of the working area along the orthographic projection profile; the measurement hole 101 is used to provide a space for the contact probe 90 to move during measurement, so that the probe 91 of the probe 90 can move to a position below the lowermost surface of the object W to be measured to perform measurement.

It should be noted that the working area is generally disposed at the central position of the supporting plate 100, the shape profile of the working area is matched with the orthographic projection profile of the object W to be measured, for example, if the object W to be measured is a rectangular plate, the working area is rectangular; if the object W to be measured is a circular plate, the working area is circular; and if the object W to be measured is an annular plate, the working area is annular, and so on.

The position of the measurement hole 101 is set at a preset position, which is a position where a measurer wants to measure the object W to be measured. Generally, for a relatively regular object W to be measured, the preset positions do not need to be distributed over the outer contour positions of the whole object, but several positions of the preset positions are selected for measurement. The measuring holes 101 are arranged at the positions, and each measuring hole 101 is partially positioned in the working area and partially positioned outside the working area so as to ensure that the part needing to be measured is in a suspended state.

From the above, the three-coordinate testing jig comprises a supporting plate 100, the horizontal height of the object W to be tested can be lifted through the supporting plate 100, and meanwhile, a plurality of measuring holes 101 are formed in specific positions on the supporting plate 100, so that the probes 90 can conveniently extend into the supporting plate to measure the object W to be tested; the part to be measured is in a suspended state, the probe 91 of the probe 90 can move to a position below the bottommost surface of the part to be measured, so that the limitation of the thickness of the object to be measured W is avoided, each measuring point can obtain accurate coordinate values, and the range of the plate which can be measured by the three-coordinate measuring instrument is further enlarged.

Example one

Referring to fig. 2-3, in the present embodiment, the object W to be measured is a rectangular thin plate with a thickness of 2mm, and the portion to be measured includes four corners of the rectangular thin plate and the middle of the four sides. The spherical probe 91 of the probe 90 has a diameter of 2 mm.

The support plate 100 of the present embodiment has a rectangular shape, and the middle portion of the support plate 100 is provided with a working area having a contour identical to that of the rectangular thin plate. The thickness of the supporting plate 100 is required to be greater than or equal to the radius of the probe 91, for example, in the embodiment, the thickness of the supporting plate 100 is 10mm, which is much greater than the radius of the probe 91, so as to provide a sufficient downward space for the probe 91. Eight strip-shaped measuring holes 101 are formed in the outer contour of the working area corresponding to positions needing to be measured, wherein the measuring holes 101 corresponding to four edges are long straight-bar-shaped holes, and the measuring holes 101 corresponding to four corners are bent-bar-shaped holes. The length of the hole is set according to the measurement requirement, the width of the hole is determined according to the size of the spherical probe 91, for example, in the embodiment, the width of the strip-shaped holes is set to be 10mm, and enough movement space is reserved for the probe 91.

Half of the measuring orifice 101 falls inside the working area and the other half falls outside the working area. After the object W to be measured is placed, the portion to be measured is kept in a suspended state with respect to the measurement hole 101.

During measurement, the probe 91 is in one-to-one contact with the parts to be measured according to a predetermined sequence, and the spatial coordinates of each contact point are acquired. Because the thickness of the object W to be measured is thin and is the same as the diameter of the probe 91, in the prior art, the probe 91 cannot accurately measure the plate with the thickness of 0-1mm, because the probe 91 cannot move downwards any more; after the supporting plate 100 of this embodiment lifts the object W to be measured by 10mm of horizontal height, the probe 91 can smoothly extend to a lower position for contact measurement, so as to accurately obtain the spatial coordinate of each contact point of the object W to be measured, thereby ensuring the accuracy of the final measurement result.

Example two

Referring to fig. 4-6, on the basis of the first embodiment, the three-coordinate testing fixture of the present embodiment further includes a cover plate 200, where the cover plate 200 is used to press on the upper surface of the object W to be tested during the measurement to prevent the object W to be tested from generating horizontal displacement.

In some cases, the object W to be measured has a light weight, and there is a case where the object W to be measured is touched to be horizontally displaced when it comes into contact with the probe 90. In this case, the cover plate 200 is further disposed on the upper surface of the object W to be measured, thereby preventing this phenomenon.

For example, in the present embodiment, the cover plate 200 has a rectangular shape, and the shape and the outline of the cover plate are the same as those of the object W to be measured, and the area of the cover plate 200 is slightly larger than that of the object W to be measured. The cover plate 200 is provided with a plurality of avoiding holes 201 at positions corresponding to the measuring holes 101 of the support plate 100, and the avoiding holes 201 are also used for providing a moving space for the probe 90 to detect. Specifically, the shape and size of the avoidance hole 201 are kept consistent with the measurement hole 101. Of course, in other embodiments, the position and size of the avoiding hole 201 may not be consistent with those of the measuring hole 101, but the area hollowed out by the avoiding hole 201 needs to cover the whole measuring hole 101.

In the present embodiment, the supporting plate 100 is made of steel, and the cover plate 200 is made of aluminum, so that the light aluminum does not crush the object W to be measured, especially when the object W to be measured has a thin and brittle property.

In this embodiment, the thickness of the supporting plate 100 is 15mm, which can raise the height of the object W15mm to be measured, so that the probe 91 can be inserted into a lower position for measurement, and the thickness of the cover plate 200 is 10mm, which can provide enough pressure for the object W to be measured, so as to ensure that the object W is not easily displaced.

Preferably, a plurality of guide posts 300 are further disposed between the cover plate 200 and the support plate 100, the cover plate 200 is provided with positioning holes 202, the guide posts 300 pass through the positioning holes 202 and are fixed on the support plate 100, and after assembly, the position of the cover plate 200 relative to the support plate 100 is fixed.

Referring to fig. 7-8, in a preferred embodiment, the three-dimensional test fixture further includes a horizontal clamp 400, wherein the horizontal clamp 400 is used for providing a clamping force to clamp the object W between the supporting plate 100 and the cover plate 200.

Specifically, the horizontal clamp 400 includes a fixing base 401, a clamping arm assembly 402 and an adjusting assembly 403, the fixing base 401 is fixed on the supporting plate 100 or the working table 98 by bolts, the clamping arm assembly 402 is hinged to the top of the fixing base 401, and the adjusting assembly 403 is disposed at the front end of the clamping arm assembly 402. The top of fixing base 401 is equipped with U type connecting portion 404, arm clamping component 402 includes handle 405, connection piece 406 and centre gripping arm 407, the rear end bottom of centre gripping arm 407 articulates the front end at U type connecting portion 404, the one end of connection piece 406 articulates the rear end at U type connecting portion 404, the rear end top of centre gripping arm 407 and the other end of connection piece 406 all articulate in the front end of handle 405 to handle 405, connection piece 406 and centre gripping arm 407 three link motion, can realize opening or clamping of centre gripping arm 407 through pulling handle 405. Wherein, the front end of centre gripping arm 407 is equipped with Y type connecting portion 408, and adjusting part 403 includes position sleeve 409, screw rod 410 and adjusting nut 411, and position sleeve 409 is fixed in on Y type connecting portion 408, and screw rod 410 threaded connection is in position sleeve 409, and adjusting nut 411 is connected on the top of screw rod 410, through rotatory adjusting nut 411, can drive screw rod 410 and reciprocate relative position sleeve 409.

In this embodiment, two horizontal clamps 400 are symmetrically disposed on two sides of the working area, the adjusting components 403 of the two horizontal clamps 400 extend above the working area and press down on the cover plate 200, so that a user can flexibly adjust the clamping force of the horizontal clamps 400 according to the property of the object W to be tested, and the object W is not damaged while the cover plate 200 and the supporting plate 100 clamp the object W to be tested. Further, the bottom of the screw 410 is connected with a rubber pad 412, which can play a role of buffering and avoid clamping the cover plate 200. And the two screws 410 are respectively pressed down at two symmetrical positions on the diagonal of the cover plate 200 for providing a balanced pressing force and ensuring the position stability of the object W to be measured during measurement.

It should be noted that the horizontal clamp 400 is used to clamp the object W to be measured by the cover plate 200 and the supporting plate 100, so the number of the horizontal clamps 400 can be flexibly set according to the size of the object W to be measured, and the downward pressing points of the horizontal clamps 400 are uniformly distributed at the middle position of the cover plate 200 as much as possible to ensure the balance of the downward pressing force.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a three-coordinate test fixture places on three-coordinate measuring instrument's table surface, and cooperation contact probe measures its characterized in that to await measuring the object: the device comprises a supporting plate with a certain thickness, wherein the supporting plate is provided with a working area, the working area is matched with an orthographic projection profile of an object to be measured, and a plurality of measuring holes are arranged at preset positions of the working area along the orthographic projection profile;

2. The three-dimensional test fixture as claimed in claim 1, further comprising a cover plate for pressing on the upper surface of the object to be tested during measurement to prevent the object to be tested from horizontal displacement.

3. The three-dimensional test fixture as claimed in claim 2, wherein the cover plate has a shape profile the same as the support plate, and the cover plate has an avoiding hole corresponding to the measuring hole.

4. A three dimensional test fixture according to any one of claims 1 to 3 wherein the support plate and the cover plate are rectangular, the working area is rectangular in outline, and the measuring holes are arranged along the rectangular outline.

5. The three-coordinate testing fixture of claim 3, wherein the measuring holes and the avoiding holes are all strip-shaped holes, and the width of each strip-shaped hole is 10 mm.

6. The three-coordinate testing fixture of claim 2, wherein the thickness of the supporting plate is greater than or equal to the radius of the probe.

7. The three-coordinate testing fixture of claim 6, wherein the supporting plate has a thickness of 15mm and the cover plate has a thickness of 10 mm.

8. The three-dimensional test fixture of claim 2, further comprising a horizontal clamp for clamping an object to be tested between the support plate and the cover plate.

9. The three-dimensional test fixture as claimed in claim 2, wherein the supporting plate is made of steel and the cover plate is made of aluminum.

10. A three-coordinate measuring instrument, comprising a worktable, a contact probe and the three-coordinate testing fixture as claimed in any one of claims 1 to 9, wherein a measuring space is provided above the worktable, and the contact probe can move freely in the measuring space;