TW201629429A - Flatness adjusting device and test fixture applying the flatness adjusting device - Google Patents

Abstract

A test fixture includes a flatness adjusting device and a test module. The flatness adjusting device includes a holding module. The flatness adjusting device is configured for leveling a work-piece held in the holding module. The flatness adjusting device also includes elastic components and limit components. Bottom surfaces of the limit components are in a horizontal plane. The elastic components are placed on the holding module. The work-piece is located between the elastic components and the limit components and a top surface of the work-piece is attached on the bottom surfaces of the limit components closely.

Description

Flatness adjusting device and test fixture using the flatness adjusting device

The present invention relates to an auxiliary component, and more particularly to a flatness adjusting device and a test fixture using the flatness adjusting device.

In the prior art, some fixtures, such as the body of the positioning component for clamping the workpiece, are caused by various unavoidable reasons, such as structural design, deformation caused by processing and assembly, etc., resulting in uneven thickness of the body material, so that the body of the positioning component The reference surface is not flat, causing the position of the workpiece to be clamped to be tilted or offset, which in turn affects subsequent operations. For example, when a workpiece is clamped in a positioning component for a test operation, the workpiece is inaccurately aligned with the test component due to the offset of the workpiece clamping position, resulting in inability to test or inaccurate test results.

In view of the above, it is necessary to provide a flatness adjusting device capable of self-adjusting the reference surface and a test fixture using the flatness adjusting device.

A flatness adjusting device includes a positioning component for positioning a workpiece mounted on the positioning component in a horizontal plane, wherein the flatness adjusting device further comprises an elastic component and a limiting component. The lower surface of the limiting member is located on a horizontal surface, and the elastic member is disposed on the positioning assembly, and the elastic member and the limiting member are used for elastically clamping the workpiece to make the upper surface and the limit of the workpiece The surface is fitted under the piece.

A test fixture comprising the above flatness adjustment device and a test assembly, the test assembly comprising a horizontally disposed probe.

Compared with the prior art, the flatness adjusting device of the present invention corrects the unevenness of the physical surface by using the elastic deformable principle of the elastic member, and clamps the workpiece between the limiting member and the elastic member of the positioning assembly through control. The level of the surface below the stop causes the workpiece that abuts the lower surface of the stop to be in a horizontal plane, thereby adjusting the workpiece to a horizontal position. When the flatness adjusting device is applied to the test fixture, the flatness adjusting device is used to ensure accurate alignment when testing the hole to be tested of the workpiece.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a test fixture to which the flatness adjusting device of the present invention is applied.

2 is an exploded perspective view of the test fixture shown in FIG. 1.

Figure 3 is a perspective view of the test fixture shown in Figure 1 in operation.

Figure 4 is a cross-sectional view of the apparatus shown in Figure 3.

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

The flatness adjusting device 100 of the present invention can be applied to devices such as test fixtures, automated assembly lines, and the like. This embodiment specifically describes the application of the flatness adjustment device 100 in a test fixture 300. The flatness adjusting device 100 is used to adjust the flatness of the workpiece 200 fixed in the test fixture 300, so that the workpiece 200 is kept horizontal to ensure accurate alignment during testing. It should be noted that the workpiece 200 is a planar plate structure.

Referring to FIG. 1, the flatness adjusting device 100 includes a resilient member 10 for clamping a positioning assembly 20 and a limiting member of the workpiece 200, and a panel 30 for carrying the positioning assembly 20.

The elastic member 10 is disposed on the positioning assembly 20 . The elastic member 10 is a structure having an elastic deformation ability such as a rubber, a spring, or the like. In this embodiment, the elastic element 10 is at least three elastic ball plungers, and the elastic ball plungers are spaced apart to form a geometric figure, and the geometric figure may be a non-linear figure such as a triangle or a quadrangle.

Referring to FIG. 1 and FIG. 2 simultaneously, in the embodiment, the positioning assembly 20 is substantially rectangular for positioning and clamping the workpiece 200. In other embodiments, to hold and test other shapes of the workpiece, such as a circular shape, a circular positioning assembly 20 can be employed. The positioning assembly 20 includes a fixing member 21 and a movable member 22. The movable member 22 is movable to engage with the fixing member 21 to constitute a rectangular frame in which the workpiece 200 is fixed. In this embodiment, the fixing member 21 is substantially in the shape of a rectangle having a short corner, and the movable member 22 is substantially in the shape of a right angle in which the fixing member 21 is missing.

The fixing member 21 includes a base 211. A side portion of the base 211 forms a engaging portion 212 for engaging the movable member 22. The fixing member 21 is fixed to the panel 30. In the present embodiment, the fixing member 21 is fixed to the panel 30 by screws (not shown), thereby causing the surface of the substrate 211 to be uneven.

Referring to FIG. 2, the substrate 211 is provided with a plurality of positioning holes 213 and a plurality of ribs 214. Each positioning hole 213 is for receiving an elastic ball plunger. In this embodiment, four positioning holes 213 are defined in the base 211, and the four positioning holes 213 are respectively disposed at portions of the base 211 near the four corners. The four positioning holes 213 are surrounded by a rectangle. The positioning hole 213 may be a perforation or a blind hole. In this embodiment, the positioning hole 213 is a perforation. The elastic member 10 may be fixed in the positioning hole 213 or may be placed only in the positioning hole 213. The original height of the elastic member 10 is greater than the depth of the positioning hole 213, that is, the elastic member 10 is received in the positioning hole 213 and protrudes from the upper surface of the substrate 211.

The baffle 214 is formed on an edge of the upper surface of the fixing member 21, and is formed to extend vertically from an upper surface of the base 211 in a direction away from the base 211. In the present embodiment, the fixing member 21 includes three bars 214 formed on three right angles of the fixing member 21, respectively. The width and height of the three bars 214 are respectively equal. The distance between adjacent second bars 214 can be designed according to actual needs. In this embodiment, the three bars 214 are spaced apart from each other.

The movable member 22 can be engaged or disengaged from the fixing member 21 by an external force. The movable member 22 includes a bottom plate 221 and a retaining wall 222. The thickness of the bottom plate 221 is equal to the thickness of the base 211 of the fixing member 21. The side surface of the bottom plate 221 forms a joint portion 223 for engaging with the engaging portion 212 of the fixing member 21. The shape and size of the engaging portion 223 of the movable member 22 are completely compatible with the shape and size of the engaging portion 212 of the fixing member 21. The retaining wall 222 is formed to extend vertically from the upper surface of the bottom plate 221 in a direction away from the bottom plate 221 . In the present embodiment, the retaining wall 222 has a right angle toward the engaging portion 223. The width and height of the retaining wall 222 are equal to the width and height of the bar 214 of the fixing member 21, respectively.

Referring to FIG. 1 and FIG. 2, when the fixing member 21 and the movable member 22 are engaged by an external force, the engaging portion 223 of the movable member 22 is engaged with the engaging portion 212 of the fixing member 21; The retaining wall 222 of the movable member 22 is engaged with a stopper 214 of the fixing member 21. The bottom plate 221 of the movable member 22 and the base 211 of the fixing member 21 together form a rectangular carrying platform, and the retaining wall 222 of the movable member 22 and the retaining strip 214 of the fixing member 21 are collectively arranged in a rectangular shape. A clamping space is used to clamp the workpiece 200.

The limiting member is disposed on the positioning component 20 . In the embodiment, the limiting component includes a first limiting component 24 and a second limiting component 25 . The first limiting member 24 and the second limiting member 25 are fixed above the clamping space for holding the workpiece 200 in a vertical direction.

Referring to FIG. 2 again, the first limiting member 24 is L-shaped and is fixed to one of the bars 214 of the fixing member 21 and located directly above the right angle of the fixing member 21. The two outer sides of the first limiting member 24 are flush with the two sides of the strip 214 of the fixing member 21, respectively. The width of the first limiting member 24 is greater than the width of the crosspiece 214 such that the inner side edges of the first limiting member 24 protrude from the inner side of the blocking strip 214 of the fixing member 21 The workpiece 200 is mounted on the side.

The second limiting member 25 has a V shape and is fixed to the retaining wall 222 of the movable member 22 . The second limiting member 25 and the first limiting member 24 are located at opposite angles of the positioning assembly 20 . The two outer sides of the second limiting member 25 are flush with the two sides of the retaining wall 222 of the movable member 22. The width of the second limiting member 25 is equal to the width of the first limiting member 24, so that the two inner sides of the second limiting member 25 protrude from the retaining wall 222 of the movable member 22. The inner side of the two sides holds the workpiece 200 mounted therein.

The panel 30 includes a first platform 31 and a second platform 32 that protrudes outward from the surface of the first platform 31. In this embodiment, the first platform 31 is a rectangle. The second platform 32 is a rectangle having a small size, and two adjacent sidewalls of the first platform 31 and two adjacent sidewalls of the second platform 32 are respectively coplanar. The second platform 32 is configured to carry the fixing member 21 of the positioning assembly 20 and simultaneously carry the movable member 22. When the fixing member 21 and the movable member 22 are engaged, the movable member 22 is disposed above a corner of the second platform 32, and the angle of the second platform 32 is located on the platform of the first platform 31.

Referring to FIG. 1, in the present embodiment, the movable member 22 is driven by a cylinder 40. The cylinder 40 is disposed on the first platform 31 of the panel 30 and is in contact with the movable member 22 of the positioning assembly 20 to power the movement of the movable member 22.

Referring again to FIGS. 1 and 2, the flatness adjustment device 100 of the present invention can be applied to a test fixture 300 that also includes a test assembly 50. The test assembly 50 includes an elongated probe 51. The probe 51 is horizontally disposed. To accommodate the probe 51, a guide hole 215 is defined in one side of one of the bars 214 of the fixing member 21 of the positioning component 20. The guide hole 215 is perpendicular to the bar 214. In this embodiment, the guiding hole 215 has a U shape.

3 and 4 are schematic views of testing the workpiece 200 using the test fixture 300 of the present invention. The workpiece 200 is a planar plate body whose shape and size are adapted to the clamping space of the positioning assembly 20. The workpiece 200 includes a top surface 210, an end surface 220 and a hole 230 to be tested. The hole 230 to be tested extends from the end surface 220 in a direction parallel to the top surface 210 and perpendicular to the end surface 220. During the test, the hole 230 to be tested faces the guide hole 215 of the positioning component 20 of the test fixture 300.

When the test fixture 300 of the present invention is in operation:

First, the top surface 210 of the workpiece 200 faces upward, and the end surface 220 faces the guiding hole 215 of the positioning assembly 20, and is placed on the base 211 of the fixing member 21 to clamp the elastic member 10 to the Between the workpiece 200 and the substrate 211 of the fixture 21.

Then, the workpiece 200 is pressed down, the workpiece 200 is snapped under the first limiting member 24, and the cylinder 40 is activated to push the movable member 22 into engagement with the fixing member 21, and the The second limiting member 25 is located above the workpiece 200.

Then, the external force of the workpiece 200 is removed, and at this time, the gravity of the four elastic members 10 in the workpiece 200 and the downward pressure of the first limiting member 24 and the second limiting member 25 are removed. Deformation is generated to apply a supporting force to the workpiece 200 opposite to the direction of gravity and pressure. The supporting force pushes the workpiece 200 under the first limiting member 24 and the second limiting member 25, and attaches the top surface 210 of the workpiece 200 to the first limiting member 24 and the first The lower surface of the second limiting member 25 further causes the top surface 210 of the workpiece 200 to be on the same horizontal surface.

During the clamping process, the baffle 214 of the fixing member 21 and the retaining wall 222 of the movable member 22 restrict the horizontal movement of the workpiece 200; the four elastic members 10 and the first limit The piece 24 and the second stop 25 limit the vertical movement of the workpiece 200. The workpiece 200 is thereby fixed to the clamping space of the positioning assembly 20.

Finally, the probe 51 of the test component 50 is pushed through the guide hole 215 into the hole 230 to be tested of the workpiece 200 for testing.

Compared with the prior art, the test fixture 300 of the present invention incorporates the flatness adjusting device 100 such that the bottom surface of the workpiece 200 changes from the state of the surface of the conventional fitting positioning assembly 20 to The elastic member 10 of the flatness adjusting device 100 is placed on the elastic member 10 to correct the unevenness of the physical surface by the elastic deformation principle of the elastic member 10, and the workpiece 200 is clamped to the limiting member and the elastic member 10 of the positioning assembly 20. Between the workpieces 200 abutting the lower surface of the limiting member is controlled to be in a horizontal plane by controlling the levelness of the lower surface of the limiting member, thereby causing the testing component 50 to be probed The needle 51 can be probed horizontally and unimpeded into the hole 230 to be tested of the workpiece 200 for testing.

In addition, the flatness adjusting device 100 of the present invention is not only simple in structure, simple in operation, but also low in cost, and the elastic member 10 can be replaced at any time without affecting the operation of the original test fixture 300.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧ Flatness adjustment device

10‧‧‧Flexible components

20‧‧‧ Positioning components

21‧‧‧Fixed parts

211‧‧‧Base

212‧‧‧Contact Department

213‧‧‧Positioning holes

214‧‧ ‧ s

215‧‧‧ Guide hole

22‧‧‧Activities

221‧‧‧floor

222‧‧ ‧ retaining wall

223‧‧‧ joints

24‧‧‧First limiter

25‧‧‧second limiter

30‧‧‧ panel

31‧‧‧First platform

32‧‧‧Second platform

40‧‧‧ cylinder

50‧‧‧Test components

51‧‧‧ probe

200‧‧‧Workpiece

210‧‧‧ top surface

220‧‧‧ end face

230‧‧‧ hole to be tested

300‧‧‧Test fixture

no

100‧‧‧ Flatness adjustment device

10‧‧‧Flexible components

20‧‧‧ Positioning components

21‧‧‧Fixed parts

22‧‧‧Activities

223‧‧‧ joints

24‧‧‧First limiter

25‧‧‧second limiter

30‧‧‧ panel

31‧‧‧First platform

32‧‧‧Second platform

40‧‧‧ cylinder

50‧‧‧Test components

300‧‧‧Test fixture

Claims (10)

A flatness adjusting device includes a positioning component for positioning a workpiece mounted on the positioning component in a horizontal plane, wherein the flatness adjusting device further comprises an elastic component and a limiting component The lower surface of the limiting member is located on a horizontal surface, the elastic member is disposed on the positioning component, and the elastic member and the limiting member are used for elastically clamping the workpiece to make the upper surface of the workpiece The surface of the stopper is fitted. The flatness adjusting device of claim 1, wherein the elastic member is at least three elastic ball plungers, and the at least three elastic ball plungers form a non-linear geometric shape. The flatness adjusting device of claim 1, wherein the positioning assembly comprises a fixing member and a movable member, and the movable member is movable to engage with the fixing member to form a workpiece to be fixed therein. framework. The flatness adjusting device of claim 3, wherein the fixing member comprises a base, the base is provided with a plurality of positioning holes for receiving the elastic member, and the positioning hole is a perforation. The original height of the elastic element is greater than the depth of the positioning hole. The flatness adjusting device of claim 4, wherein the base is further provided with a plurality of ribs, the widths and the heights of the dams are respectively equal, and the side of the base forms a engaging portion for Engage the moving parts. The flatness adjusting device of claim 5, wherein the movable member comprises a bottom plate and a retaining wall, and the side of the bottom plate forms a joint portion for contacting the engaging portion of the fixing member. . The flatness adjusting device according to claim 6, wherein the thickness of the bottom plate is equal to the thickness of the base of the fixing member, and the width and height of the retaining wall are respectively opposite to the retaining piece of the fixing member. The width and height are equal. The flatness adjusting device of claim 6, wherein the at least one limiting member comprises a first limiting member disposed on a retaining wall of the movable member and disposed in the fixing member a second limit member on a strip. The flatness adjusting device of claim 8, wherein the widths of the first limiting member and the second limiting portion are both greater than a width of the crosspiece. A test fixture comprising the flatness adjustment device according to any one of claims 1 to 9, wherein the test fixture further comprises a test component for testing a workpiece The test assembly includes a horizontally disposed probe.