STM probe grinding machine

Abstract

The utility model discloses an STM probe grinding machine which comprises a bottom plate, a swing platform and a block-up platform are arranged on the bottom plate, a first sliding assembly sliding in the X-axis direction is arranged on the block-up platform, and a grinding machine is arranged on the top of the first sliding assembly. One end of the swing platform is connected with the bottom plate through a limiting shaft and rotates on the surface of the bottom plate in the peripheral direction of the limiting shaft, a second sliding assembly sliding in the Y-axis direction is arranged on the surface of the swing platform, a hollow main shaft is arranged at the top of the second sliding assembly, and the hollow main shaft is connected with the second sliding assembly through a bearing seat; and one end of the hollow main shaft is provided with a quick-locking chuck, and the other end is connected with a rotary driving mechanism. The needle grinding efficiency is high, the grinding process is stable and reliable, and the quality is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of probe grinding, in particular to an STM probe grinding machine. Background Art

[0002] An STM probe, or the probe used in a scanning tunneling microscope, is a tool used to observe and study the atomic structure of a material surface at the nanoscale. The STM probe's extremely sharp tip is key to achieving high-resolution imaging.

[0003] Before using the probe, the needle tip needs to be ground. The grinding accuracy directly affects the test results. The existing grinding method basically uses pure manual processing, which requires too much personal experience, and the grinding process takes a long time to ensure that the needle tip meets the use requirements.

[0004] Since grinding is based on experience, manual operation often results in problems such as unstable probe handling. Of course, auxiliary structures can be used for fixation, but when pushing the fixing mechanism for grinding, there will still be a large vibration problem, causing the needle tip to be extremely unstable during grinding, making it difficult to grind a needle tip to the micron or nanometer level. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide an STM probe grinding machine with high needle grinding efficiency, stable and reliable grinding process and greatly improved quality.

[0006] In order to solve the above technical problems, the utility model provides an STM probe grinding machine, including a base plate, a swinging platform and a raised platform are provided on the base plate, a first sliding component sliding along the X-axis direction is provided on the raised platform, a grinding wheel is provided on the top of the first sliding component, one end of the swinging platform is connected to the base plate through a limiting shaft and rotates on the surface of the base plate along the peripheral direction of the limiting shaft, a second sliding component sliding along the Y-axis direction is provided on the surface of the swinging platform, a hollow main shaft is provided on the top of the second sliding component, the hollow main shaft is connected to the second sliding component through a bearing seat, a quick-lock chuck is provided at one end of the hollow main shaft, and the other end is connected to a rotation drive mechanism.

[0007] Furthermore, a locking screw is provided on the swing platform, which is threadedly connected to the swing platform and extends through the end portion to abut against the base plate to fix the relative position of the swing platform and the base plate. An arc-shaped angle scale is also provided on the base plate on one side of the swing platform, and an angle pointer is provided on the surface of the swing platform.

[0008] Furthermore, a limiting groove is provided at the bottom of the arc-shaped angle scale, and a limiting block is provided at the end of the swing platform, and the limiting block is arranged in the limiting groove.

[0009] Furthermore, the first sliding assembly and the second sliding assembly are both screw slides.

[0010] Furthermore, a positioning wedge and a fixed block are arranged in parallel on the top of the slider of the first sliding assembly, the body of the grinding wheel machine is arranged between the positioning wedge and the fixed block, and a wedge-shaped protrusion is provided on the bottom of the body of the grinding wheel machine on one side of the positioning wedge, and the wedge-shaped protrusion cooperates with the positioning wedge for positioning, and a fixing screw is provided on the fixed block, and the fixing screw is used to squeeze and fix the body of the grinding wheel machine toward the positioning wedge.

[0011] Furthermore, a counterweight seat is provided on the top of the slider of the second sliding assembly, the bearing seat is fixed on the counterweight seat, a mounting frame is provided on one side of the counterweight seat, and the rotation drive mechanism is fixed on the mounting frame.

[0012] Furthermore, a limiting pressure plate is provided on the top of the limiting shaft, a mounting groove is provided on the bottom plate corresponding to the bottom of the limiting shaft, and a Teflon gasket is provided between the swing platform around the limiting shaft and the bottom plate.

[0013] Furthermore, a shock-absorbing support foot is provided at the bottom of the base plate, and a coupling is also provided on the surface of the base plate.

[0014] Beneficial effects of the utility model:

[0015] 1. The hollow spindle cooperates with the quick chuck to stably clamp the probe, and the first sliding component can make the probe remain stable after being extended to the grinding position. In combination with the second sliding component, the grinding wheel machine can perform reciprocating motion to achieve the effect of grinding the probe end. During the whole process, only the first sliding component and the second sliding component need to be manually operated, which effectively solves the instability of the probe grinding end. The mechanical clamping is stable and reliable, and the processing quality is improved.

[0016] 2. The swing platform can rotate on the base, and can adjust the axial angle between the hollow spindle and the grinding machine, that is, the contact angle between the probe and the grinding wheel of the grinding machine can be changed, so that the needle tip can be ground at different angles, thereby improving efficiency and sharpness and reducing experience requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the matching structure of the arc angle scale and the swing platform of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the first sliding assembly of the utility model in cooperation with the grinding machine;

[0020] Figure 4 This is a schematic diagram of the top structure of the second sliding assembly of the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the connection between the swing platform and the base plate axis of the utility model;

[0022] Figure 6 It is a schematic diagram of the position relationship after the angle of the utility model is adjusted. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0024] Reference Figure 1 As shown, an embodiment of the STM probe grinding machine of the present invention includes a base plate 1, a swinging platform 2 and a raising platform 3 are provided on the base plate, a first sliding component 4 sliding along the X-axis direction is provided on the raising platform, a grinding wheel 5 is provided on the top of the first sliding component, one end of the swinging platform is connected to the base plate through a limit shaft 6 and rotates on the surface of the base plate along the peripheral direction of the limit shaft, a second sliding component 7 sliding along the Y-axis direction is provided on the surface of the swinging platform, a hollow main shaft 8 is provided on the top of the second sliding component, the hollow main shaft is connected to the second sliding component through a bearing seat 9, a quick-lock chuck 10 is provided at one end of the hollow main shaft, and the other end is connected to the rotation drive mechanism 111.

[0025] The probe is a platinum-iridium wire, which is inserted from the tail to the front end of the hollow spindle and then extended from the quick chuck. After extension, the quick chuck is clamped to fix the probe. The extension length should not be too long, so that the quick chuck does not interfere with the grinding wheel during grinding, to avoid shaking caused by excessive extension.

[0026] After the probe is installed, the swing platform is rotated and adjusted according to the grinding requirements so that the axial direction of the probe after being fixed forms a certain angle with the surface of the grinding wheel on the grinding machine. For example, if rough grinding is performed first, the angle is adjusted to 6°. If fine grinding is required, the angle is adjusted to 10°.

[0027] After the angle adjustment is completed, the second sliding component is actuated to drive the hollow spindle toward the grinding machine, so that the end of the probe is located on the grinding machine's processing path. The second sliding component is then fixed in position, and the hollow spindle is then rotated by the rotary drive mechanism. That is, the probe rotates on its own, and the grinding machine rotates. The first sliding component drives the grinding machine forward, and the rotating grinding wheel contacts the rotating probe for grinding. During the entire process, there is no need for manual support of the probe, and there is no problem of shaking. In addition, due to the fixed angle, the grinding size accuracy is high, and there is no need to rely on experience to judge whether the processing meets the requirements, which is conducive to standardized preparation.

[0028] Reference Figure 1 and Figure 2 As shown, the above-mentioned swing platform is provided with a locking screw 11, which is threadedly connected to the swing platform. The locking screw is rotated so that the end thereof extends out and abuts against the bottom plate. During the abutment process, the relative position of the swing platform and the bottom plate can be fixed by the reaction force. An arc angle scale 12 is also provided on the bottom plate on one side of the swing platform, and an angle pointer 13 is provided on the surface of the swing platform. When the swing platform rotates, the adjusted angle size is determined according to the scale on the arc angle scale pointed by the angle pointer, which is convenient for operation. Figure 6 As shown, after the angle of the swing platform is adjusted, a clear angle is formed relative to the grinding machine, so that a conical structure can be ground on the probe.

[0029] Since the swing platform is fixed by reaction force, a limit groove 14 can be opened at the bottom of the arc angle scale, and a limit block 15 is set at the end of the swing platform. After the limit block is set in the limit groove and extended by the locking screw, its force causes the swing platform to move upward. At this time, the arc angle scale performs the upper limit positioning. The limit block contacts the bottom of the arc angle scale corresponding to the limit groove, forming a strong fastening effect, and can also ensure the horizontal position accuracy of the swing platform.

[0030] The above-mentioned first sliding assembly and second sliding assembly are both screw slides and can be manual structures, which can be moved forward or backward by hand rotation, which is easy to operate; of course, they can also be automatically controlled by motors to improve the level of automated grinding.

[0031] Reference Figure 3 As shown, a positioning wedge 16 and a fixed block 17 are arranged in parallel on the top of the slider of the first sliding assembly. The body of the grinding wheel machine is arranged between the positioning wedge and the fixed block. A wedge-shaped protrusion 18 is arranged on the bottom of the body of the grinding wheel machine on one side of the positioning wedge. The wedge-shaped protrusion cooperates with the positioning wedge for positioning. A fixing screw 191 is arranged on the fixed block. The fixing screw is used to squeeze and fix the body of the grinding wheel machine toward the positioning wedge. Through squeezing, the body of the grinding wheel machine is subjected to force in the horizontal direction while being squeezed downward by the positioning wedge, thereby ensuring that the body of the grinding wheel machine can fit tightly with the top of the slider. Most importantly, this method not only ensures effective fixation, but also has the effect of quick disassembly. The grinding wheel machine can be quickly removed by simply loosening the fixing screws, so as to facilitate quick repair and maintenance or replacement of the grinding wheel.

[0032] Reference Figure 4As shown, for the setting of the hollow main shaft, a counterweight seat 19 is set on the top of the slider of the second sliding assembly, and the bearing seat is fixed on the counterweight seat. The counterweight seat can strengthen the overall weight here to ensure the stability of the structure. Slight vibration will not affect the hollow main shaft. A mounting frame 20 is provided on one side of the counterweight seat, and the rotation drive mechanism is fixed on the mounting frame to ensure that it can move synchronously with the hollow main shaft.

[0033] Reference Figure 5 As shown, a limiting pressure plate 21 is provided on the top of the limiting shaft, and a mounting groove is provided on the base plate corresponding to the bottom of the limiting shaft. A Teflon gasket 23 is also provided between the swing platform around the limiting shaft and the base plate. The limiting pressure plate limits the height position of the swing platform here on the limiting shaft, and the Teflon gasket can play a role of stretching between the swing platform and the base plate, so that the swing platform and the lower surface of the limiting pressure plate are effectively fitted. The Teflon gasket also plays a self-lubricating effect when the swing platform rotates, and the rotation is smooth and not stuck.

[0034] In one embodiment, shock-absorbing feet are provided at the bottom of the base plate to reduce the impact of external environmental factors on the mechanism during processing, as well as the impact of vibration generated by the grinding wheel during processing on the processing; specifically, a coupling 24 can also be provided on the surface of the base plate, which is connected to the connecting shaft through the coupling. The connecting shaft can be fixed in the installation space. At this time, the vibration displacement generated during the processing can be effectively curbed by the fixed connecting shaft, thereby further improving the processing accuracy.

[0035] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention shall fall within the protection scope of the present invention.

Claims

1. An STM probe grinding machine, characterized in that: It includes a base plate, on which a swinging platform and a raised platform are provided, a first sliding component sliding along the X-axis direction is provided on the raised platform, a grinding wheel is provided on the top of the first sliding component, one end of the swinging platform is connected to the base plate through a limiting shaft and rotates on the surface of the base plate along the peripheral direction of the limiting shaft, a second sliding component sliding along the Y-axis direction is provided on the surface of the swinging platform, a hollow main shaft is provided on the top of the second sliding component, the hollow main shaft is connected to the second sliding component through a bearing seat, a quick-lock chuck is provided at one end of the hollow main shaft, and the other end is connected to the rotation drive mechanism.

2. The STM probe grinding machine according to claim 1, wherein A locking screw is provided on the swing platform, which is threadedly connected to the swing platform and extends through the end portion to abut against the base plate to fix the relative position of the swing platform and the base plate. An arc-shaped angle scale is also provided on the base plate on one side of the swing platform, and an angle pointer is provided on the surface of the swing platform.

3. The STM probe grinding machine according to claim 2, wherein: A limiting groove is provided at the bottom of the arc-shaped angle scale, and a limiting block is provided at the end of the swing platform, and the limiting block is arranged in the limiting groove.

4. The STM probe grinding machine according to claim 1, wherein The first sliding assembly and the second sliding assembly are both screw slides.

5. The STM probe grinding machine according to claim 1, wherein: A positioning wedge and a fixed block are arranged in parallel on the top of the slider of the first sliding assembly, the body of the grinding wheel machine is arranged between the positioning wedge and the fixed block, and a wedge-shaped protrusion is provided on the bottom of the body of the grinding wheel machine on one side of the positioning wedge. The wedge-shaped protrusion cooperates with the positioning wedge for positioning, and a fixing screw is provided on the fixed block, and the fixing screw is used to squeeze and fix the body of the grinding wheel machine toward the positioning wedge.

6. The STM probe grinding machine according to claim 1, wherein: A counterweight seat is provided on the top of the sliding block of the second sliding assembly, the bearing seat is fixed on the counterweight seat, a mounting frame is provided on one side of the counterweight seat, and the rotation drive mechanism is fixed on the mounting frame.

7. The STM probe grinding machine according to claim 1, wherein: A limiting pressure plate is provided on the top of the limiting shaft, a mounting groove is provided on the bottom plate corresponding to the bottom of the limiting shaft, and a Teflon gasket is further provided between the swing platform around the limiting shaft and the bottom plate.

8. The STM probe grinding machine according to claim 1, wherein: The bottom of the base plate is provided with a shock-absorbing support foot, and the surface of the base plate is also provided with a coupling.

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