TW201715218A - Test jig for coating adhesion strength - Google Patents

Abstract

A test jig for coating adhesion strength is provided to have a base, a sample carrier, a first and second displacement mechanism mounted on the base, a cutting knife holder and two cutting knives orientated differently and mounted between the sample carrier and the second displacement mechanism. The sample carrier, the first and second displacement mechanism can be driven to move such that the cutting knives can exert a constant pressure to cut the sample on the sample carrier. Thus, the test jig can accurately control the cutting velocity and the cutting pressure of the cutting knives to make each of the cuttings substantially the same and make the test result more convincing.

Description

Coating adhesion test fixture

The present invention relates to a test fixture capable of automatically and accurately testing the adhesion of a coating applied to a sample.

Traditionally, the test method for measuring the adhesion of a coating is to first use a specific tool to cut the pattern on the surface of the coating, and then paste and peel the tape on the pattern, by examining the peeling of the coating. Determine if the adhesion of the coating meets the standard. In general, the adhesion of the coating can be divided into the following six levels:

Traditionally, the work of cutting the grid pattern mostly relies on labor. It usually has the following shortcomings: (1) The cutting angle, cutting pressure and cutting speed of the tool and the coating surface are difficult to control accurately, so that each cut The results usually lack consistency and reduce the credibility of the test results; (2) the traditional manual cutting method is difficult to apply to samples with an area less than 1cm ² or samples with poor surface flatness; (3) possible Cut the tester. Therefore, a test fixture that can improve the above-mentioned defects needs to be invented.

In view of this, the main object of the present invention is to provide a test fixture, which can The adhesion of the coating applied to the sample is tested more accurately.

Another object of the present invention is to provide a test fixture that can be tested automatically.

In order to achieve the above object, the present invention provides a coating adhesion test fixture comprising a base, a sample stage, a first displacement mechanism, a second displacement mechanism, a tool holder and two cutters. Wherein, the sample stage is disposed on the base and can be driven to be displaced in a first direction. The first displacement mechanism is also disposed on the base and above the sample stage, and has a first positioning member that can be driven to be displaced in a second direction. The second displacement mechanism is disposed on the first positioning member, and has a second positioning member that is driven to be displaced in a third direction. The tool holder is disposed on the second positioning member and has a first surface and a second surface to respectively mount the two cutters.

Thereby, the aforementioned test fixture can automatically control the movement of the sample stage and the cutter, thereby accurately controlling the speed and pressure of the cutter during cutting, so that the cutting condition of each cut tends to be uniform, and the credibility of the test result is increased.

Preferably, a fixing plate is further fixed on the second positioning member, so that the tool holder is movably disposed on the second positioning member through the fixing plate, and a load cell is disposed to connect the two ends thereof Fixing plate and tool positioning seat. Thereby, the position of the second positioning member can be controlled according to the pressure measured by the load cell, and the tool can be controlled to cut the coating under the same pressure condition, thereby overcoming the problem that the surface flatness of the sample is poor.

1‧‧‧Test fixture

10‧‧‧ Pedestal

20‧‧‧Sample stage

22‧‧‧sample setting area

24‧‧‧sample fixing unit

241‧‧‧fixed slot

242‧‧‧Parts

243‧‧‧Flexible parts

30‧‧‧First displacement mechanism

31‧‧‧First positioning piece

32‧‧‧second motor

33‧‧‧First slide rail

34‧‧‧ column

40‧‧‧Second displacement mechanism

41‧‧‧Second positioning parts

42‧‧‧third motor

43‧‧‧Fixed plate

44‧‧‧ Connecting rod

45‧‧‧Compression spring

46‧‧‧Second rail

50‧‧‧Tool holder

51‧‧‧ first side

52‧‧‧ second side

60‧‧‧Tools

61‧‧‧blade

80‧‧‧ load weight

S‧‧‧ sample

1 is a perspective view of a test fixture of a preferred embodiment of the present invention; and FIG. 2 is an enlarged schematic view of a sample setting area 22 of a preferred embodiment of the present invention; 3 is a top view of the sample fixing unit in FIG. 2; FIG. 4 is a side view of a test fixture according to a preferred embodiment of the present invention; and FIG. 5 is another perspective view of the test fixture according to a preferred embodiment of the present invention. Side view; and Figure 6 is a schematic view of the angle between the tool and the coating in accordance with a preferred embodiment of the present invention.

In order to better understand the features of the present invention, the coating adhesion test fixture of the present invention provides a preferred embodiment and is described below in conjunction with the drawings. Please refer to Figures 1 to 3. Hereinafter, for convenience of explanation, the first direction is set in the X-axis direction of the rectangular coordinate system, the second direction is set in the Y-axis direction of the orthogonal coordinate system, and the third direction is set in the Z-axis direction, and the first direction, the first direction The two directions and the third direction are perpendicular to each other. It should be noted that the first direction, the second direction and the third direction described in the present invention should not be limited to the above-mentioned right angle coordinate system.

The main components of the coating adhesion test fixture 1 of the present invention comprise a base 10, a sample stage 20, a first displacement mechanism 30, a second displacement mechanism 40, a cutter holder 50, two cutters 60 and a The controller (not shown), the structure of each component and the relationship between them are detailed as follows: Please refer to Figure 1 first. The sample stage 20 is disposed on the base 10 and is displaceable in the X-axis direction by driving of a first motor (not shown, located below the sample stage 20). This embodiment takes the sample stage 20 and the susceptor 10 as a linear slide group as an example. Further, a sample setting area 22 is provided in the center of the sample stage 20 for the setting of the sample.

Please refer to FIG. 2 and FIG. 3, and FIG. 2 is an enlarged schematic view of the sample setting area 22. It can be seen that there are thirty sample fixing units 24 in the sample setting area 22, which are six by five. The array mode is arranged, and each sample fixing unit 24 is used to fix a sample S. 3 is a top view of the sample fixing unit 24, wherein the sample fixing unit 24 includes a fixing groove 241, a pressing member 242 and an elastic member 243, and the sample S, the pressing member 242 and the elastic member 243 are accommodated and fixed. In the groove 241, the three sides of the sample S abut against the inner wall of the fixing groove 241 and one of the sides abuts the pressing member 242, and the two ends of the elastic member 243 respectively abut against the inner wall pressing member 242 of the fixing groove 241 to make the sample S can be stably positioned in the fixing groove 241 by the pressing of the pressing member 242.

Referring to FIGS. 1 and 4 , the first displacement mechanism 30 is disposed on the base 10 and includes a first positioning member 31 , a second motor 32 , and a first sliding rail 33 . The first slide rail 33 is disposed on the base 10 and the sample stage 20 horizontally along the Y-axis direction through the two uprights 34. The first positioning member 31 is a slider and is slidably disposed on the first slide rail. 33. The second motor 32 is disposed on one side of the first sliding rail 33 to drive the first positioning member 31 to be displaced along the Y-axis direction.

Referring to FIGS. 1 and 5, the second displacement mechanism 40 is disposed on the first positioning member 31 of the first displacement mechanism 30, and has a second positioning member 41, a third motor 42 and a Z-axis. A second sliding rail 46 extending in the direction; wherein the second positioning member 41 is slidably disposed on the second sliding rail 46 as a slider, and is displaceable in the Z-axis direction by the driving of the third motor 42. In the embodiment, the first displacement mechanism 30 is further provided with a fixing plate 43, a three connecting rods 44 and three compression springs 45. The fixing plate 43 is fixed to the second positioning member 41, and one end of the connecting rod 44 is The fixing plate 43 is fixed to the fixing plate 43 and the other end is movably connected to the tool holder 50, and each connecting rod 44 is coaxially sleeved with a compression spring 45. The two ends of each compression spring 45 are respectively fixed to the tool by the top fixing plate 43. The seat 50 reduces the vibration of the tool holder 50.

Incidentally, the first motor, the second motor 32, and the third motor 42 of the present embodiment both use a stepping motor, and other types of drivers may be used. The aforementioned connecting rod 44 and pressure The number of the contraction springs 45 is also not limited to three.

The tool holder 50 is disposed on the second positioning member 41 through the fixing plate 43. The tool holder 50 has a first surface 51 (as shown in FIG. 5) substantially parallel to the X-axis direction, and a substantially parallel Y-axis direction. A second side 52 (as in Figure 4). In addition, a load cell 80 is also disposed between the tool holder 50 and the fixed plate 43. The load cell 80 is used to measure the pressure applied by the tool 60 to the coating, so the load cell The two ends of the 80 can be connected to the fixing plate 43 and the cutter holder 50, respectively.

The two cutters 60 are respectively disposed on the first surface 51 and the second surface 52 of the cutter holder 50 so that the cutter 60 can cut the coating in the parallel X-axis direction and the parallel Y-axis direction. In addition, the angle between the blade 61 of the cutter 60 and the sample stage 20 is adjustable. In the present embodiment, the angle θ between the blade 61 and the sample stage 20 is adjusted to a 15 degree angle (eg, 6th). Figure).

The controller (not shown) is used to drive the first motor, the second motor 32 and the third motor 42, and can synchronously control the number of moving steps and the moving speed of each motor, thereby controlling the position and speed of each tool 60. With the pressure, as well as the position and movement speed of the sample stage 20. In the present embodiment, the controller is disposed on the base 10, and the edited motor control command can be burned to the control wafer using the burner to control the motors. In addition, in other possible cases, the controller can also be a computer host and can drive and control each motor by executing an appropriate program.

The structure of each element of the present embodiment and the relationship between them have been described, and the manner of use of the test jig 1 will be described below.

When the test is required, the sample S is first fixed in the sample setting area 22. Thereafter, the controller drives the first motor, the second motor 32, and the third motor 42 to move the tool 60 correspondingly to the position of the sample S and cut into the coating of the sample S. At this point, the controller measures the tool through the load cell 80. The pressure of 60 is controlled, and then, according to the specification of the test method, a plurality of cutting lines are cut along the parallel X-axis or the parallel Y-axis at a certain interval and under equal pressure, respectively, until the grid array pattern is completed.

It should be noted that when one of the tools 60 is used for cutting, the operator can selectively adjust the position or angle of the unused tool 60 to prevent the unused tool 60 from accidentally touching the sample stage 20.

Since the cutter 60 of different directions is disposed on the first surface 51 and the second surface 52 in advance in this embodiment, it is not necessary to rotate the cutter holder 50 during the test, and the sample S does not need to be disassembled, which simplifies the test process. And save test time.

This embodiment automatically and precisely controls the angle, speed and pressure of each cutting through each motor, and in addition to making the test results more reliable, it can also avoid cutting the tester. Moreover, since the control precision of the stepping motor is generally high, the tool 60 can cut the coating in a small range, and thus the present invention is more applicable to testing the sample S of a small area.

On the other hand, this embodiment can also be used to test a sample having a curved surface. In detail, the controller can draw the grid array pattern according to the pressure detected by the load cell 80, so that the cutter 60 can maintain the same pressure at different positions of the curved surface of the sample.

Finally, it must be noted that the constituent elements disclosed in the foregoing embodiments of the present invention are merely illustrative and are not intended to limit the scope of the present invention, and other structural changes that are easily conceivable, or alternatives to other equivalent elements. Changes should also be covered by the scope of the patent application for this case.

1‧‧‧Test fixture

10‧‧‧ Pedestal

20‧‧‧Sample stage

22‧‧‧sample setting area

30‧‧‧First displacement mechanism

31‧‧‧First positioning piece

32‧‧‧second motor

33‧‧‧First slide rail

34‧‧‧ column

40‧‧‧Second displacement mechanism

41‧‧‧Second positioning parts

42‧‧‧third motor

43‧‧‧Fixed plate

44‧‧‧ Connecting rod

45‧‧‧Compression spring

46‧‧‧Second rail

50‧‧‧Tool holder

51‧‧‧ first side

60‧‧‧Tools

Claims (11)

A coating adhesion test fixture includes: a base; a sample stage disposed on the base and drivable to be displaced in a first direction; a first displacement mechanism disposed on the base Located above the sample stage, a first positioning member is driven to be displaced in a second direction; a second displacement mechanism is disposed on the first positioning member, and the second displacement mechanism has a second positioning member Driven to be displaced downward in a third direction; a tool holder is disposed on the second positioning member, the tool holder has a first surface and a second surface; and two cutters are respectively disposed on the first One side with the second side. The coating adhesion test fixture of claim 1, further comprising a load cell disposed between the second positioning member and the tool holder. The coating adhesion test fixture of claim 2, wherein the second displacement mechanism further comprises a fixing plate fixed to the second positioning member, wherein the tool holder is movably disposed through the fixing plate a second positioning member, the two ends of the load cell are respectively connected to the fixing plate and the tool positioning seat. The coating adhesion test fixture of claim 3, wherein the second displacement mechanism further comprises at least one connecting rod, the at least one connecting rod is fixedly connected to the fixing plate at one end, and the tool holder is movable Ground the other end of the connecting rod. The coating adhesion test fixture of claim 4, wherein the second displacement mechanism further comprises at least one compression spring sleeved with the at least one connecting rod and the two ends respectively abut the fixing plate and the cutter holder. The coating adhesion test fixture of claim 1, wherein each of the cutters has a cutting edge, and an angle between the cutting edge and the sample stage is at an angle of 15 degrees. The coating adhesion test fixture of claim 1, wherein the sample stage, the first positioning member and the second positioning member are respectively driven by three drivers, and the drivers are all stepping motors. The coating adhesion test fixture of claim 1, wherein the first direction, the second direction, and the third direction form a right angle table, the first side of the tool holder and the first The two sides are substantially parallel to the first direction and the second direction, respectively. The coating adhesion test fixture of any one of claims 1 to 8, wherein the first displacement mechanism has a first slide rail, and the second displacement mechanism has a second slide rail, the first positioning The second positioning member and the second positioning member are respectively arranged as a slider to be respectively disposed on the first sliding rail and the second sliding rail. The coating adhesion test fixture of claim 9, further comprising a controller for controlling the speed and pressure of each of the cutters for cutting. The coating adhesion test fixture according to any one of claims 1 to 8, wherein the sample stage is provided with at least one sample fixing unit, each of the at least one sample fixing unit comprising a fixing groove and a pressing member. And an elastic member, the pressing member and the elastic member are received in the fixing groove, and the two ends of the elastic member respectively abut against the inner wall of the fixing groove and the pressing member.