A fixture for preparing variable thickness coating sample and its use method

Abstract

The present invention discloses a fixture for preparing variable thickness coating samples and a method for using the same. The fixture comprises a fixture shell, on which a sample accommodating space, a plurality of cavities and a plurality of timer mounting holes are provided; the sample accommodating space is located in the middle position of the fixture shell, the plurality of cavities are connected with the sample accommodating space, and a blocking cover and a blocking cover locking device are provided in each cavity; a mechanical timer is installed in the timer mounting hole, and the timer mounting hole is connected with the cavity through a connecting area; the blocking cover is connected with the blocking cover locking device, and the blocking cover locking device is connected with a firing lever of the mechanical timer through a connecting area; the present invention can prepare variable thickness coating samples in one coating experiment, solves the problem that traditionally only samples of coatings of one thickness can be processed in one experiment, greatly improves processing efficiency, and ensures that experimental comparisons are more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of coating preparation, and in particular to a fixture for preparing variable-thickness coating samples and a method for using the fixture. Background Art

[0002] Due to the high cost of cutting fluid and its environmental pollution, dry cutting is becoming more and more widely used. Dry cutting generates a lot of cutting heat during processing, which requires higher mechanical properties of the tool. With the application of difficult-to-process materials such as chilled cast iron, high-temperature alloys, stainless steel, titanium alloys, and composite materials, higher requirements are placed on the hardness, toughness, high-temperature oxidation resistance, thermal stability and other properties of the tool material. The application of tool coating enables the tool to obtain good cutting performance and prolong the cutting process.

[0003] In the fields of high-speed cutting, dry cutting (without coolant), etc., in order to meet the requirements of different cutting processes, the coating thickness, composition, etc. will tend to be more targeted. The current methods for preparing tool coatings mainly include chemical vapor deposition, physical vapor deposition, plasma chemical vapor deposition and ion beam assisted deposition, etc., among which the coating thickness prepared by the above processes has an important influence on the cutting performance, cutting life and wear resistance of the tool. Therefore, when using tool coating preparation, it is generally necessary to prepare different coating thicknesses through preliminary experiments, and then carry out scratch experiments on coatings of different thicknesses, measure some properties of the coatings, and thus select the optimal coating thickness for spraying. In the prior art, when preparing coatings of different thicknesses in preliminary experiments, coatings of different thicknesses are mainly prepared separately, and the existing processes for preparing coatings all have the problem of long processing time, resulting in a long entire experimental cycle, which affects the preparation of later coatings. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a fixture for preparing variable thickness coating samples and a method for using the fixture, which solves the problem that traditional experiments can only process samples with one thickness of coating in one experiment, greatly improves the coating processing efficiency during the experiment, and ensures that the experimental comparison is more accurate.

[0005] The technical solutions of the present invention are as follows:

[0006] In a first aspect of the present invention, a fixture for preparing variable thickness coating samples is provided, comprising a fixture shell, on which a sample accommodating space, a plurality of cavities and a plurality of timer mounting holes are provided; the sample accommodating space is located in the middle position of the fixture shell, the plurality of cavities are connected to the sample accommodating space, and a blocking cover and a blocking cover locking device are provided in each cavity; a mechanical timer is installed in the timer mounting hole, and the timer mounting hole is connected to the cavity through a connecting area; the blocking cover is connected to the blocking cover locking device, and the blocking cover locking device is connected to the firing lever of the mechanical timer through the connecting area.

[0007] In some embodiments of the present invention, the shape of the blocking cover matches the shape of the cavity and is installed in the cavity through a slide groove, so that the blocking cover can slide in the cavity; in the initial state, multiple blocking covers are located above the sample block accommodating space, and the multiple blocking covers can cover the upper surface of the sample block to be coated.

[0008] In some embodiments of the present invention, the cover locking device includes a support column, a spring, a top block and a rocker arm, the bottom of the support column is fixed in the cavity of the clamp shell, and the rocker arm is rotatably installed on the top of the support column; the top block is fixed at the opening on the inner side of the cavity.

[0009] In some embodiments of the present invention, a circular hole is provided on the top block, a push rod passes through the circular hole, one end of the push rod is fixed to the blocking cover, and a circular blocking piece is provided at the other end, and a spring is installed between the circular blocking piece and the top block.

[0010] In some embodiments of the present invention, the rocker arm is in an irregular V-shape as a whole, one end of the rocker arm is in contact with and connected to the firing lever of the mechanical timer, and the other end is in contact with and connected to the circular baffle of the push rod.

[0011] In some embodiments of the present invention, the mechanical timer includes a timing group and a firing area, the timing group includes an escapement mechanism, a hairspring, a balance wheel, a gear group and a mainspring; the firing area includes a firing lever, a special-shaped gear and a firing cam.

[0012] In some embodiments of the present invention, the center of the mechanical timer is connected to a rotating handwheel, which is used to store potential energy, and then adjust the hand coating time of the sample surface by adjusting the rotation angle of the rotating handwheel.

[0013] In some embodiments of the present invention, the firing lever is V-shaped. When the mechanical timer returns to zero, the firing cam releases the firing lever, and then releases the blocking cover through the blocking cover locking device.

[0014] In some embodiments of the present invention, the sample accommodating space is a square cavity, and there are four cavities and four timer mounting holes. The four cavities are arranged around the sample accommodating space, and the cavities are arranged perpendicular to the sample accommodating space.

[0015] In a second aspect of the present invention, a method for using a fixture for preparing a variable thickness coating sample is provided, comprising:

[0016] The sample block to be coated is placed in the sample block accommodation space, the push rod of the cover is connected to the trigger lever of the mechanical timer through the swing rod of the cover locking device, and the cover is covered on the upper surface of the sample block to be coated under the elastic force of the spring;

[0017] Different timing times are set for multiple mechanical timers according to the required coating thicknesses. When the mechanical timers return to zero, the firing cam releases the firing lever, which in turn releases the cover through the cover locking device.

[0018] Under the elastic force of the spring, the cover is retracted into the cavity of the fixture shell, allowing the protected area to be coated, thereby preparing variable thickness coating samples in one coating experiment.

[0019] One or more technical solutions of the present invention have the following beneficial effects:

[0020] (1) The fixture for preparing variable thickness coating samples provided by the present invention is such that during the coating experiment, the surface of the processed substrate is divided into four parts, and the baffle can cover the substrate surface, thereby ensuring that the protected area is not coated. At the same time, four mechanical timers are selected to be mechanically connected to the baffle, and the baffle protection time is set by rotating the handwheel at different angles. When the mechanical timer returns to zero, the firing cam releases the firing lever, and the firing lever swings to release the locking device. Under the action of the spring, the baffle is retracted into the fixture shell, exposing the substrate surface for the coating process. Relying on the high-temperature resistant mechanical timer and the baffle, variable thickness coating samples can be prepared in one coating, solving the problem that the traditional experiment can only process samples of one thickness of coating in one experiment, thereby improving processing efficiency.

[0021] (2) The fixture for preparing variable thickness coating samples provided by the present invention is used to conduct coating preparation experiments of different thicknesses in the early stage of coating spraying. When selecting the optimal coating thickness, only one sample can be processed to obtain four coatings of different thicknesses, thereby reducing the error accumulation caused by processing multiple samples at the same time, controlling the influence of the experimental sample itself and other variables in the pretreatment on subsequent experiments, and ensuring that the comparison of subsequent experiments is more accurate and reliable.

[0022] (3) The fixture for preparing variable thickness coating samples provided by the present invention links the process of releasing the firing lever after the mechanical timer ends and the movement of the cover through the provided cover locking device, so that four treatments of different durations can be performed on the same substrate, thereby reducing the influence of irrelevant variables and reducing the consumption of raw materials. The time when the sample block is not coated is set by the mechanical timer, thereby controlling the coating time of the sample block surface.

[0023] (4) The fixture for preparing variable thickness coating samples provided by the present invention is not limited to the application of experiments before coating preparation, but can also be applied to occasions with different spraying requirements, or occasions in other fields that require protection, such as processes that require protection during plasma cleaning. It has a wide range of applications and good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structural assembly of a fixture for preparing variable thickness coating samples according to the present invention;

[0025] Figure 2 yes Figure 1 Cross-section at AA in the middle;

[0026] Figure 3 yes Figure 1 Cross-section at the middle BB;

[0027] Figure 4 Schematic diagrams of the parts related to the mechanical timer of the present invention; wherein (a) is an overall schematic diagram of the mechanical timer, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (b);

[0028] Figure 5 Schematic diagram of the parts related to the cover locking device of the present invention;

[0029] Figure 6 is a schematic diagram of the cover locking device of the present invention being released;

[0030] Figure 7 Schematic diagram of the fixture housing structure of the present invention; wherein (a) is an overall schematic diagram of the fixture housing, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (b);

[0031] Figure 8 Schematic diagrams of the structure of the firing lever of the present invention; (a) is a top view of the firing lever, (b) is a side view of the firing lever, and (c) is a three-dimensional view of the firing lever;

[0032] Figure 9Schematic diagram of the structure of the swing rod of the cover locking device of the present invention; wherein (a) is a top view of the swing rod, (b) is a side view of the swing rod, and (c) is a three-dimensional view of the swing rod;

[0033] Figure 10 Schematic diagram of the structure of the barrier cover of the present invention; wherein (a) is a side view of the barrier cover, (b) is a rear view of the barrier cover, (c) is a top view of the barrier cover, and (d) is a three-dimensional view of the barrier cover;

[0034] Figure 11 Schematic diagram of the structure of the support column of the cover locking device of the present invention; wherein (a) is a front view of the support column, (b) is a top view of the support column, and (c) is a three-dimensional view of the support column;

[0035] Figure 12 Schematic diagram of the structure of the rotating hand wheel of the present invention; wherein (a) is a front view of the rotating hand wheel, (b) is a top view of the rotating hand wheel, and (c) is a three-dimensional view of the rotating hand wheel;

[0036] Figure 13 Schematic diagram of the key structure of the present invention; wherein (a) is a front view of the key, (b) is a side view of the key, and (c) is a top view of the key;

[0037] Figure 14 Schematic diagram of the top block structure of the present invention; (a) is a front view of the top block, (b) is a side view of the top block, and (c) is a top view of the top block.

[0038] In the figure: 1. Clamp shell; 101. Sample block accommodating space; 102. Cavity; 103. Timer mounting hole; 104. Connecting area; 2. Cover; 3. Turning handwheel; 4. Key; 5. Support column; 6. Nut; 7. Mechanical timer; 8. Circular cover; 9. Push rod; 10. Top block; 11. Rocker; 12. Mechanical timer top cover; 13. Mechanical timer housing; 14. Handwheel shaft; 15. Gear set; 16. Spring; 17. Special-shaped gear; 18. Firing cam; 19. Escapement; 20. Hairspring; 21. Balance wheel; 22. Firing lever; 23. Spring. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] Example 1

[0041] In a typical embodiment of the present invention, a fixture for preparing a coating sample with variable thickness is provided, such as Figures 1-14As shown, it includes a fixture shell 1, on which a sample block accommodating space 101, multiple cavities 102 and multiple timer mounting holes 103 are provided; the sample block accommodating space 101 is located in the middle position of the fixture shell 1, and the multiple cavities 102 are connected to the sample block accommodating space 101, and each cavity 102 is provided with a blocking cover 2 and a blocking cover locking device; a mechanical timer 7 is installed in the timer mounting hole 103, and the timer mounting hole 103 is connected to the cavity 102 through a connecting area 104; the blocking cover 2 is connected to the blocking cover locking device, and the blocking cover locking device is connected to the firing lever 22 of the mechanical timer 7 through the connecting area 104.

[0042] In this embodiment, the shape of the blocking cover 2 matches the shape of the cavity 102 and is installed in the cavity 102 through a slide groove, so that the blocking cover 2 can slide in the cavity 102; in the initial state, multiple blocking covers 2 are located above the sample block accommodating space 101, and multiple blocking covers 2 can cover the upper surface of the sample block to be coated.

[0043] like Figure 5 and Figure 6 As shown, the cover locking device includes a support column 5, a spring 23, a top block 10 and a swing rod 11. The bottom of the support column 5 is fixed in the cavity 102 of the fixture housing 1, and the swing rod 11 is rotatably mounted on the top of the support column 5; the top block 10 is fixed at the opening inside the cavity 102. The structures of the swing rod 11 and the support column 5 are as shown in FIG. Figure 9 and Figure 11 As shown, the pendulum rod 11 is an irregular V-shape as a whole, a round hole is provided on the pendulum rod 11, the top of the support column 5 is a screw, the pendulum rod 11 is installed on the top of the support column 5 through the round hole, and is limited by the nut 6. The nut 6 is not tightened to ensure that the pendulum rod 11 can rotate freely.

[0044] Further, if Figure 14 As shown, a circular hole is provided on the top block 10 , and a push rod 9 passes through the circular hole. One end of the push rod 9 is fixed to the blocking cover 2 , and a circular blocking piece 8 is provided at the other end. A spring 23 is installed between the circular blocking piece 8 and the top block 10 .

[0045] like Figure 5 Reference Figure 3 One end of the rocker arm 11 is in contact with the firing lever 22 of the mechanical timer 7, and the other end is in contact with the circular baffle 8 of the push rod 9. At this time, the spring 23 is in a contracted state between the circular baffle 8 and the top block 10, thereby pushing the baffle cover 2 out of the cavity 102 through the push rod 9 so that the baffle cover 2 covers the top of the sample block to be coated.

[0046] like Figure 4As shown, the mechanical timer 7 includes a timing group and a firing area arranged in a mechanical timer housing 13 and a mechanical timer top cover 12. The timing group includes an escapement mechanism 19, a hairspring 20, a balance wheel 21, a gear group 15 and a mainspring 16; the firing area includes a firing lever 22, a special-shaped gear 17 and a firing cam 18.

[0047] In this embodiment, the center of the mechanical timer 7 is connected to the rotating hand wheel 3 through the key 4, and the rotating hand wheel 3 is mounted on the hand wheel shaft 14. Figure 12 and Figure 13 As shown, the rotating hand wheel 3 is used to store potential energy, and the hand coating time of the sample surface can be adjusted by adjusting the rotation angle of the rotating hand wheel 3. The mechanical timer 7 is made of high-temperature resistant material, and the triggering area triggers the cover locking device. The mechanical timer 7 is interference-mounted in the timer mounting hole 103.

[0048] like Figure 8 As shown, the firing lever 22 is V-shaped. When the mechanical timer 7 returns to zero, the firing cam 18 releases the firing lever 22, and then releases the cover 2 through the cover locking device. Figure 6 As shown, when the firing cam 18 releases the firing lever 22, one end of the rocker arm 11 no longer contacts the firing lever 22, so that the rocker arm 11 rotates, and the other end of the rocker arm 11 no longer contacts the spring block plate at the end of the push rod, and the spring 23 resets, and the blocking cover 2 is retracted into the cavity 102 of the clamp shell 1 through the push rod 9.

[0049] Compared to the existing structure, the timing group of the mechanical timer remains unchanged, but the firing area (corresponding to the alarm group of a conventional mechanical timer) has been improved. A firing lever 22 is provided to replace the hammer in conventional mechanical timers. The firing lever 22 is V-shaped. When the time of the mechanical timer 7 returns to zero, the firing cam 18 releases the firing lever 22, which in turn releases the cover 2 via the rocker 11. Simultaneously, the winding spring and ratchet mechanism at the bottom of the firing area have been eliminated. The power for the firing lever 22, rocker 11, and cover 2 is provided by a spring 23. The hammer of the conventional mechanical timer alarm group performs a regular reciprocating swing, which is meaningless to the movement of the cover retracting into the fixture housing and may even affect the retraction of the cover. Therefore, eliminating the winding spring and ratchet mechanism allows the firing lever to change its reciprocating motion to a single motion, which is more suitable for this embodiment.

[0050] like Figure 7 As shown, the sample accommodating space 101 is a square cavity, and there are four cavities 102 and four timer mounting holes 103 . The four cavities 102 are arranged around the sample accommodating space 101 , and the cavities 102 are arranged perpendicular to the sample accommodating space 101 .

[0051] The working principle of the fixture for preparing variable thickness coating samples provided in this embodiment is as follows:

[0052] The bottom of the fixture housing 1 is provided with a connection portion for securing to the coating equipment. The sample to be coated is placed in the sample storage space. The push rod of the cover is connected to the trigger lever of the mechanical timer via the rocker of the cover locking device. The spring force causes the cover to cover the upper surface of the sample to be coated.

[0053] Different timing times are set for multiple mechanical timers according to the required coating thicknesses. When the mechanical timers return to zero, the firing cam releases the firing lever, which in turn releases the cover through the cover locking device.

[0054] Under the elastic force of the spring, the cover is retracted into the cavity of the fixture shell, allowing the protected area to be coated, thereby preparing variable thickness coating samples in one coating experiment.

[0055] The fixture for preparing variable thickness coating samples provided in this embodiment adopts a block processing method, and is designed with a fixture shell that can be embedded in the sample and a cover that can block the PVD process. The sample to be processed is divided into four parts under the cover of the cover, and four different processing times can be performed on the same substrate, which reduces the influence of irrelevant variables and reduces the consumption of raw materials. A high-temperature resistant mechanical timer and a cover locking device are designed, and the time when the sample is not coated is set by the mechanical timer, thereby controlling the coating time of the sample surface. When the timer is reset to zero, the mechanical timer triggers the cover locking device to work, releases the cover, and starts coating the protected area, thereby preparing variable thickness coating samples in one coating experiment, solving the problem that traditional experiments can only process samples with one thickness of coating in one experiment, greatly improving the processing efficiency, and ensuring that the experimental comparison is more accurate.

[0056] Example 2

[0057] In a typical embodiment of the present invention, a method for using a fixture for preparing a variable thickness coating sample is provided, comprising:

[0058] The sample block to be coated is placed in the sample block accommodation space, the push rod of the cover is connected to the trigger lever of the mechanical timer through the swing rod of the cover locking device, and the cover is covered on the upper surface of the sample block to be coated under the elastic force of the spring;

[0059] Different timing times are set for multiple mechanical timers according to the required coating thicknesses. When the mechanical timers return to zero, the firing cam releases the firing lever, which in turn releases the cover through the cover locking device.

[0060] Under the elastic force of the spring, the cover is retracted into the cavity of the fixture shell, allowing the protected area to be coated, thereby preparing variable thickness coating samples in one coating experiment.

[0061] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A fixture for preparing variable thickness coating samples, characterized in that: The fixture comprises a fixture shell, on which a sample accommodating space, a plurality of cavities, and a plurality of timer mounting holes are provided; the sample accommodating space is located in the middle of the fixture shell, the plurality of cavities are connected to the sample accommodating space, and each cavity is provided with a blocking cover and a blocking cover locking device; A mechanical timer is installed in the timer mounting hole, and the timer mounting hole is connected to the cavity through a connecting area; the blocking cover is connected to the blocking cover locking device, and the blocking cover locking device is connected to the firing lever of the mechanical timer through the connecting area.

2. The fixture for preparing a variable thickness coating sample according to claim 1, characterized in that: The shape of the blocking cover matches the shape of the cavity and is installed in the cavity through a slide groove, so that the blocking cover can slide in the cavity; in the initial state, multiple blocking covers are located above the sample block accommodating space, and the multiple blocking covers can cover the upper surface of the sample block to be coated.

3. The fixture for preparing a variable thickness coating sample according to claim 1, characterized in that: The cover locking device includes a support column, a spring, a top block and a rocker arm. The bottom of the support column is fixed in the cavity of the clamp shell, and the rocker arm is rotatably installed on the top of the support column; the top block is fixed at the opening inside the cavity.

4. The fixture for preparing a variable thickness coating sample according to claim 3, characterized in that: A circular hole is provided on the top block, and a push rod passes through the circular hole. One end of the push rod is fixed to the blocking cover, and a circular blocking piece is provided at the other end. A spring is installed between the circular blocking piece and the top block.

5. The fixture for preparing a variable thickness coating sample according to claim 4, characterized in that: The swing rod is in an irregular V-shape as a whole. One end of the swing rod is in contact with and connected to the firing lever of the mechanical timer, and the other end is in contact with and connected to the circular blocking piece of the push rod.

6. The fixture for preparing a variable thickness coating sample according to claim 1, characterized in that: The mechanical timer includes a timing group and a firing area. The timing group includes an escapement mechanism, a hairspring, a balance wheel, a gear group and a mainspring; the firing area includes a firing lever, a special-shaped gear and a firing cam.

7. The fixture for preparing a variable thickness coating sample according to claim 6, characterized in that: The center of the mechanical timer is connected to a rotating hand wheel, and the rotating hand wheel is used to store potential energy, and then the hand coating time of the sample block surface is adjusted by adjusting the rotation angle of the rotating hand wheel.

8. The fixture for preparing a variable thickness coating sample according to claim 6, characterized in that: The firing lever is V-shaped. When the mechanical timer returns to zero, the firing cam releases the firing lever, and then releases the blocking cover through the blocking cover locking device.

9. The fixture for preparing a variable thickness coating sample according to claim 1, characterized in that: The sample block accommodating space is a square cavity. There are four cavities and four timer mounting holes. The four cavities are arranged around the sample block accommodating space, and the cavities are arranged perpendicular to the sample block accommodating space.

10. A method for using the fixture for preparing a variable thickness coating sample according to any one of claims 1 to 9, characterized in that: include: The sample block to be coated is placed in the sample block accommodation space, the push rod of the cover is connected to the trigger lever of the mechanical timer through the swing rod of the cover locking device, and the cover is covered on the upper surface of the sample block to be coated under the elastic force of the spring; Different timing times are set for multiple mechanical timers according to the required coating thicknesses. When the mechanical timers return to zero, the firing cam releases the firing lever, which in turn releases the cover through the cover locking device. Under the elastic force of the spring, the cover is retracted into the cavity of the fixture shell, allowing the protected area to be coated, thereby preparing variable thickness coating samples in one coating experiment.

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