CN220670371U - Test fixture for hole test - Google Patents
Test fixture for hole test Download PDFInfo
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- CN220670371U CN220670371U CN202322275486.7U CN202322275486U CN220670371U CN 220670371 U CN220670371 U CN 220670371U CN 202322275486 U CN202322275486 U CN 202322275486U CN 220670371 U CN220670371 U CN 220670371U
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- 238000012360 testing method Methods 0.000 title claims abstract description 133
- 239000000523 sample Substances 0.000 claims abstract description 58
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a test fixture for hole test, which comprises a pressing plate and a plurality of test probe rods arranged on the pressing plate according to preset positions, wherein the test probe rods are movably connected with the pressing plate through a deflection structure, and when the pressing plate is pressed on a product to be tested, the test probe rods can deflect at a small angle along the direction of the pressing plate. The position of the aperture above the product to be tested and the preset position have slight deviation, and if the deviation is in a reasonable range, then when the pressing plate is pressed onto the product to be tested, the test probe rod can still be inserted into the aperture of the product to be tested, and then the test can be completed.
Description
Technical Field
The utility model relates to the field of test equipment, in particular to a test fixture for hole test.
Background
GD & T testing means that the finished part has dimensional tolerances, so that the actual shape or mutual position of the points, lines, faces that make up the geometric features of the part differ from the shape and mutual position specified by the ideal geometry, the difference in shape being the shape tolerance, and the difference in mutual position being the position tolerance, these differences being collectively referred to as the form and position tolerance (geometric tolerance).
As the degree of automation of various products increases, the requirements on the form and position tolerance of each fitting become more and more strict, and as the form and position tolerance of one fitting becomes too large, problems may occur in the subsequent assembly process, for example, in the automotive field, in the production process of an automobile headlamp, a plurality of jacks are distributed on an integral mold, the jacks play a role in positioning besides the function of connection and fixation, the position of each jack, the size and depth of the aperture are strictly positioned in the design process, and other structures in the mold can be designed and extended based on the relative position of the jack, so that the requirements on GD & T test of the apertures are extremely high.
The existing GD & T test is usually carried out in two ways, namely, a CMM (three-coordinate) test device is adopted for testing, the product to be tested is placed in a CMM test machine for testing, the test is accurate, but the test time of the CMM test machine is long, the test time on a single product can reach 2-3 hours according to the quantity of the apertures, and the CMM test machine is complex in operation, high in purchase cost and almost impossible to put into use in a large-scale production test scene; secondly, testing is carried out by using a testing jig, the principle is that a plurality of testing probe rods are arranged on a pressing plate with different sizes from a product to be tested according to the distribution of aperture standards of the product to be tested, then the pressing plate is pressed on the product to be tested, if the testing probe rods can be inserted into apertures, the testing is qualified, but in the mode, the requirement on the aperture distribution accuracy of the product to be tested is extremely high, almost no error is required, but GD & T testing is allowed to have small errors, so that the product with the allowed errors can be caused by adopting the second mode, and the testing can be failed.
Disclosure of Invention
In order to solve the problems, the utility model provides a testing jig for hole testing, which comprises a pressing plate and a plurality of testing probe rods arranged on the pressing plate according to preset positions, wherein the positions of the testing probe rods on the pressing plate correspond to the positions of the apertures of products to be tested, the testing probe rods are movably connected with the pressing plate through a deflection structure, and when the pressing plate is pressed on the products to be tested, the testing probe rods can deflect at a small angle along the direction of the pressing plate.
Further, the pressing plate comprises a top plate and a bottom plate, a plurality of first through holes are formed in the same positions of the top plate and the bottom plate, the test probe rod penetrates through the first through holes and extends downwards from the bottom plate, and the deflection structure is arranged between the top plate and the bottom plate.
Further, the test probe rod comprises a top and a bottom rod, a connecting seat is arranged between the top and the bottom rod, when the test probe rod passes through the first through hole, the top is arranged in the first through hole, and the bottom rod extends downwards from the bottom plate.
Further, the deflection structure comprises a connecting plate, the connecting plate is clamped and fixed by the top plate and the bottom plate, a plurality of second through holes are formed in the connecting plate, and the positions of the second through holes correspond to the positions of the first through holes.
Furthermore, the second through hole is provided with an outwards protruding connecting ring facing the direction of the bottom plate, and the connecting ring is made of elastic materials.
Further, the upper edge of the connecting ring is connected with the edge line at the bottom of the second through hole, and the lower edge of the connecting ring is connected with the edge line at the top of the connecting seat.
Further, the outer diameter of the plug of the test probe rod is smaller than the outer diameter of the first through hole.
Further, the outer diameter of the connecting seat of the test probe rod is larger than the outer diameter of the plug.
Further, the included angle between the connecting ring and the plug is between 1 and 5 degrees.
Further, a containing cavity for containing the connecting plate is arranged in the top plate.
The beneficial effects of the utility model are as follows:
the utility model provides a test probe rod and clamp plate form swing joint through deflection structure, and test probe rod can send into the deflection of minor angle along the direction of clamp plate, if there is slight deviation in the position of the aperture above the product that awaits measuring and the position of predetermineeing like this, and this deviation is in reasonable within range, then when pressing the clamp plate on the product that awaits measuring, the deflection of minor angle can take place for test probe rod, thereby can make test probe rod still insert in the aperture of product that awaits measuring, and then can accomplish the test, compare among the prior art, test probe rod and clamp plate are fixed connection and unable deflection, if there is the deviation in the allowed range in the position of the aperture above the product that awaits measuring and the position of predetermineeing, then test probe rod also can't insert in the aperture of product that awaits measuring, thereby lead to the test failure, thereby influence the test of whole product.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a test fixture for hole testing according to the present utility model;
FIG. 2 is an exploded view of the overall structure of the test fixture for hole testing according to the present utility model;
FIG. 3 is a schematic diagram of a top plate of the test fixture for hole testing according to the present utility model;
FIG. 4 is a schematic structural view of a test probe of the test fixture for hole testing of the present utility model;
FIG. 5 is a schematic diagram of a deflection structure of a test fixture for hole testing according to the present utility model;
FIG. 6 is a cross-sectional view of a deflection structure of a test fixture for hole testing according to the present utility model.
Reference numerals and names in the drawings are as follows:
the testing device comprises a pressing plate 100, a testing probe rod 200, a deflection structure 300, a top plate 110, a bottom plate 120, a first through hole 111, a top head 210, a bottom rod 220, a connecting seat 230, a connecting plate 310, a containing cavity 112, a second through hole 311 and a connecting ring 312.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-6, a preferred embodiment of the present utility model will be described specifically, and a test fixture for hole testing includes a pressing plate 100 and a plurality of test probes 200 mounted on the pressing plate 100, where the position of the test probes 200 preset on the pressing plate 100 corresponds to the position of the hole diameter of the product to be tested, when the hole diameter GD & T test is required, the pressing plate 100 is pressed onto the product to be tested, if the test probes 200 can be inserted into the hole diameter of the product to be tested, the position of the hole diameter of the product to be tested is no problem, if the test probes 200 cannot be inserted into the hole diameter of the product to be tested, the position of the hole diameter of the product to be tested is a problem, the test probes 200 and the pressing plate 100 are movably connected by a deflection structure 300, and when the pressing plate 100 is pressed onto the product to be tested, the test probes 200 can be deflected at a small angle along the direction of the pressing plate 100, so that the test probes 200 can be better inserted into the hole diameter of the product to be tested, thereby completing the hole diameter test. It can be seen from the above embodiment that the test probe 200 is movably connected to the pressing plate 100 by the deflection structure 300, and the test probe 200 can be deflected at a small angle along the direction of the pressing plate 100, so if there is a slight deviation between the position of the aperture above the product to be tested and the preset position, and if the deviation is within a reasonable range, the test probe 200 will deflect at a small angle when the pressing plate 100 is pressed onto the product to be tested, so that the test probe 200 can still be inserted into the aperture of the product to be tested, and thus the test can be completed.
As shown in fig. 1 to 4, the pressing plate 100 includes a top plate 110 and a bottom plate 120, a plurality of first through holes 111 are provided at the same positions of the top plate 110 and the bottom plate 120, the test probe rod 200 passes through the first through holes 111 and protrudes downward from the bottom plate 120, the deflection structure 300 is provided between the top plate 110 and the bottom plate 120, the test probe rod 200 includes a top head 210 and a bottom rod 220, a connection seat 230 is provided between the top head 210 and the bottom rod 220, the top head 210 is in the first through holes 111 when the test probe rod 200 passes through the first through holes 111, and the bottom rod 220 protrudes downward from the bottom plate 120 for being inserted into the aperture of the product to be tested.
The deflection structure 300 comprises a connecting plate 310, the connecting plate 310 is clamped and fixed by a top plate 110 and a bottom plate 120, a containing cavity 112 for containing the connecting plate 310 is arranged in the top plate 110, so that the whole three layers are more compact, a plurality of second through holes 311 are arranged in the connecting plate 310, the positions of the second through holes 311 correspond to the positions of the first through holes 111, so that the test probe rod 200 simultaneously passes through the first through holes 111 and the second through holes 311 to enable the bottom plate 120 to extend downwards, an outwards protruding connecting ring 312 is arranged in the direction of the bottom plate 120 in the second through holes 311, the connecting ring 312 is made of elastic materials, a horn-like shape is formed at the bottom of the second through holes 311, the upper edge of the connecting ring 312 is connected with the edge line at the bottom of the second through holes 311, the lower edge of the connecting ring 312 is connected with the edge line at the top of the connecting seat 230, so that the connection seat 230 is suspended at the bottom of the second through hole 311, so that since the connection plate 310 is movably connected with the connection seat 230 through the wire connection between the connection ring 312 and the test probe 200, and since the connection plate 310 is clamped and fixed by the top plate 110 and the bottom plate 120, the whole pressing plate 100 is movably connected with the test probe 200 through the wire connection between the connection ring 312 and the connection seat 230, when the pressing plate 100 is pressed on the product to be tested, if there is a slight deviation between the position of the aperture above the product to be tested and the preset position, the test probe 200 is deflected left and right along the direction of the pressing plate 100 with the position of the wire connection between the connection ring 312 and the connection seat 230 as the center, so that the bottom rod 220 of the test probe 200 is still inserted into the aperture of the product to be tested, and then the test can be completed.
The outer diameter of the plug 210 of the test probe 200 is smaller than the outer diameter of the first through hole 111, and since the plug 210 is located in the first through hole 111 when the test probe 200 is deflected, the plug 210 of the test probe 200 is deflected in the first through hole 111 when the test probe 200 is deflected, so that the plug 210 of the test probe 200 has an outer diameter smaller than the outer diameter of the first through hole 111, and the deflection of the plug 210 in the first through hole 111 can be prevented.
The outer diameter of the connecting seat of the test probe 200 is larger than the outer diameter of the plug 210, so that the impact of deflection of the plug 210 in the first through hole 111 is prevented to the maximum extent when the bottom rod 220 deflects. Preferably, the angle between the connecting ring 312 and the plug 210 is between 1 and 5 degrees, so that the test probe 200 can deflect between 1 and 5 degrees, which is within the tolerance allowed by the aperture test.
The details of the above-described exemplary embodiments and the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A test jig for hole test, its characterized in that includes clamp plate (100) and installs a plurality of test probe rod (200) above clamp plate (100) according to predetermineeing the position, test probe rod (200) correspond the position with the aperture of product under test in the position above clamp plate (100), through deflection structure (300) swing joint between test probe rod (200) and clamp plate (100), when pressing clamp plate (100) on the product under test, test probe rod (200) can send into the deflection of small angle along the direction of clamp plate (100).
2. The test fixture for hole testing according to claim 1, wherein the pressure plate (100) comprises a top plate (110) and a bottom plate (120), a plurality of first through holes (111) are arranged at the same positions of the top plate (110) and the bottom plate (120), the test probe rod (200) passes through the first through holes (111) and protrudes downwards from the bottom plate (120), and the deflection structure (300) is arranged between the top plate (110) and the bottom plate (120).
3. The test fixture for hole testing according to claim 2, wherein the test probe (200) comprises a top head (210) and a bottom rod (220), a connecting seat (230) is arranged between the top head (210) and the bottom rod (220), the top head (210) is in the first through hole (111) when the test probe (200) passes through the first through hole (111), and the bottom rod (220) protrudes downwards from the bottom plate (120).
4. A test fixture for hole testing according to claim 3, characterized in that the deflection structure (300) comprises a connecting plate (310), the connecting plate (310) is clamped and fixed by the top plate (110) and the bottom plate (120), a plurality of second through holes (311) are arranged in the connecting plate (310), and the positions of the second through holes (311) correspond to the positions of the first through holes (111).
5. The test fixture for hole testing according to claim 4, wherein an outwardly protruding connection ring (312) is provided in the direction of the bottom plate (120) inside the second through hole (311), and the connection ring (312) is made of an elastic material.
6. The test fixture for hole testing according to claim 5, wherein the upper edge of the connection ring (312) is connected with the edge line at the bottom of the second through hole (311), and the lower edge of the connection ring (312) is connected with the edge line at the top of the connection seat (230).
7. The test fixture for hole testing according to claim 6, wherein the outer diameter of the plug (210) of the test probe (200) is smaller than the outer diameter of the first through hole (111).
8. The test fixture for hole testing according to claim 7, wherein the outer diameter of the connecting seat of the test probe (200) is larger than the outer diameter of the plug (210).
9. The test fixture for hole testing according to claim 7, wherein the angle between the connection ring (312) and the plug (210) is between 1 and 5 degrees.
10. The test fixture for hole testing according to claim 9, wherein a receiving cavity (112) for receiving a connection plate (310) is provided in the top plate (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322275486.7U CN220670371U (en) | 2023-08-23 | 2023-08-23 | Test fixture for hole test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322275486.7U CN220670371U (en) | 2023-08-23 | 2023-08-23 | Test fixture for hole test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220670371U true CN220670371U (en) | 2024-03-26 |
Family
ID=90353567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322275486.7U Active CN220670371U (en) | 2023-08-23 | 2023-08-23 | Test fixture for hole test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220670371U (en) |
-
2023
- 2023-08-23 CN CN202322275486.7U patent/CN220670371U/en active Active
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