Electrolytic machining device for integrated texture on surface of probe and control method thereof

Abstract

The invention discloses a probe surface integrated texture electrolytic machining device and a control method thereof. The probe surface integrated texture electrolytic machining device comprises a platform; the probe rotation positioning mechanism is arranged on the platform and can reciprocate along the horizontal direction relative to the platform; the probe rotation positioning mechanism is used for fixing and rotating the probe; the electrolytic machining mechanism is arranged on the platform and is provided with an electrolytic cathode; the electrolytic cathode is positioned above the probe and can slide back and forth along the vertical direction; the anode of the electrochemical workstation is electrically connected with the probe rotating and positioning mechanism, and the cathode of the electrochemical workstation is electrically connected with the electrolytic cathode; an electrolyte supply mechanism; an outlet of the electrolyte supply mechanism extends to the position between the electrolytic machining mechanism and the probe so as to supply electrolyte. The microstructure is processed on the surface of the probe, the solid-liquid contact state of the probe is changed through the microstructure, and the surface roughness of the probe is increased through the formation of the microstructure, so that the advantage that the surface of the probe is not attached by liquid is achieved, the adhesion of the surface of the probe is reduced, and an experimental analysis result is prevented from being affected due to the fact that a sample is attached to the surface of the probe.

Description

Technical Field

[0001] The invention relates to the technical field of probe surface processing, and in particular to a probe surface integrated texture electrolytic processing device and a control method thereof. Background Art

[0002] The sampling probe of the fully automatic biochemical analyzer is made of stainless steel. The probe will collect different samples. After the probe surface is cleaned, different samples can be taken. The cross contamination rate of the probe surface after cleaning is required to be less than 0.001%. In order to prevent cross contamination of various samples, cleaning the probe surface between different sample selections is the most basic operation, and the duration of cleaning directly affects the rate of sample collection. Therefore, it is of great significance to process a functional surface with low liquid adhesion characteristics on the outer surface of the probe. Probes with low adhesion characteristics have less adhesion to various samples, and the use effect of low cross contamination rate can be achieved through a short period of cleaning.

[0003] In the prior art, the adhesion of the probe is mostly reduced by preparing a composite coating on the probe surface and covering the probe surface with the coating; however, this method is prone to problems such as loose interlayer bonding and the introduction of other chemical elements during the coating preparation process, which affects the experimental analysis results.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a probe surface integrated texture electrolytic processing device and a control method thereof are provided, aiming to solve the problem in the prior art that the probe surface is covered with a coating to reduce the adhesion of the probe, which easily affects the experimental analysis results.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] A probe surface integrated texture electrolytic processing device, comprising:

[0008] platform;

[0009] The probe rotation and positioning mechanism is arranged on the platform and can reciprocate in the horizontal direction relative to the platform; the probe rotation and positioning mechanism is used to fix and rotate the probe;

[0010] An electrolytic machining mechanism is disposed on the platform and has an electrolytic cathode; the electrolytic cathode is located above the probe and can slide back and forth in a vertical direction;

[0011] An electrochemical workstation, whose anode is electrically connected to the probe rotation and positioning mechanism, and whose cathode is electrically connected to the electrolytic cathode;

[0012] An electrolyte supply mechanism; the outlet of the electrolyte supply mechanism extends between the electrolytic machining mechanism and the probe to supply electrolyte.

[0013] The probe surface integrated texture electrochemical processing device, wherein the probe rotation positioning mechanism comprises:

[0014] A rotating assembly having a probe receiving position to drive the probe to rotate;

[0015] The supporting member is arranged opposite to the probe receiving position; the supporting member can slide back and forth relative to the platform and adjust the distance between the supporting member and the probe receiving position to support and release the probe; the supporting member is electrically connected to the anode of the electrochemical workstation.

[0016] The probe surface integrated texture electrolytic processing device, wherein the electrolyte supply mechanism comprises:

[0017] An electrolyte tank is disposed between the rotating assembly and the top holding member and is used to receive electrolyte; the probe is located in the electrolyte tank;

[0018] The electrolyte circulation mechanism is connected to the electrolyte cell to form an electrolyte circulation flow path.

[0019] The probe surface integrated texture electrolytic processing device, wherein the electrolyte circulation mechanism comprises:

[0020] An electrolyte recovery tank is disposed on the platform and is lower than the electrolyte tank;

[0021] A supply pipe, one end of which is connected to the electrolyte recovery tank through a water pump, and the other end of which extends between the electrolysis cathode and the probe;

[0022] The recovery pipe is connected to the electrolyte recovery tank and the electrolyte cell respectively.

[0023] The probe surface integrated texture electrolytic processing device, wherein the rotating assembly comprises:

[0024] A driver, disposed on the platform;

[0025] The three-jaw chuck is connected to the driver so as to rotate along a vertical plane under the drive of the driver; the probe accommodation position is arranged on the three-jaw chuck.

[0026] The probe surface integrated texture electrolytic processing device, wherein the electrolytic processing mechanism comprises:

[0027] An electrolysis fixing unit is arranged on the platform;

[0028] The movable unit is arranged on the electrolysis fixed unit and can slide back and forth in a vertical direction relative to the electrolysis fixed unit; the electrolysis cathode is arranged at the bottom of the movable unit.

[0029] The probe surface integrated texture electrolytic processing device further comprises:

[0030] A CCD image observation system is arranged on the platform; and the probe is located within the imaging range of the CCD image observation system.

[0031] The probe surface integrated texture electrolytic processing device further comprises:

[0032] A first direction adjustment mechanism is disposed on the platform and connected to the CCD image observation system to drive the CCD image observation system to slide back and forth along a first direction; the first direction is parallel to the sliding direction of the probe rotation positioning mechanism;

[0033] The second direction adjustment mechanism is arranged on the platform and connected with the first direction adjustment mechanism to drive the first direction adjustment mechanism to slide back and forth along a second direction; the second direction is coplanar with the first direction and perpendicular to each other.

[0034] A control method for the probe surface integrated texture electrolytic processing device based on any one of the above items comprises the following steps:

[0035] Assembling the probe to be electrolyzed into the probe rotation and positioning mechanism, and starting the probe rotation and positioning mechanism to rotate the probe to be electrolyzed;

[0036] Controlling the electrolysis cathode to move toward the probe to be electrolyzed until the distance between the electrolysis cathode and the probe to be electrolyzed reaches a preset inter-electrode distance;

[0037] The electrolyte supply mechanism and the electrochemical workstation are turned on, and the probe rotation and positioning mechanism is controlled to reciprocate in the horizontal direction according to the preset processing length.

[0038] Beneficial effect: In the present application, the probe is electrically connected to the anode of the electrochemical workstation through the probe rotation positioning mechanism, and the electrolytic cathode is electrically connected to the cathode of the electrochemical workstation. Under the electrochemical action, a hydrogen evolution reaction occurs on the cathode surface, and the anode metal dissolves in an ionic state. The electrolyte flows through the inter-electrode gap at a high speed to provide a medium for the electrochemical reaction, while promptly removing the products generated on the cathode and anode surfaces. With the continuous feeding of the electrolytic cathode and the electrolyte supply mechanism supplying electrolyte to the inter-electrode distance between the electrolytic cathode and the probe, a microstructure is finally processed on the probe surface, and the microstructure is changed. The solid-liquid contact state of the stainless steel probe and the formation of microstructure will increase the roughness of the probe surface, resulting in a decrease in the actual contact area between the liquid and the probe surface. Especially in the case of stainless steel, the combination of the microstructure and the surface properties of the material itself can effectively reduce the contact angle hysteresis of the liquid, and the liquid is easier to roll off the surface, thereby achieving the advantages of the stainless steel probe surface not being attached by the liquid; the cylindrical probe surface is subjected to rotational electrolytic machining by electrolytic machining, and then the microstructure is machined on the entire cylindrical surface of the probe. The surface of the probe after electrolytic machining is smooth and burr-free, which greatly reduces the cross-contamination rate during multi-sample extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the probe surface integrated texture electrolytic processing device of the present invention;

[0040] Figure 2 is a top view of the probe surface integrated texture electrolytic processing device of the present invention;

[0041] Figure 3 It is a front view of the probe surface integrated texture electrolytic processing device of the present invention;

[0042] Figure 4 It is a flow chart of the control method described in the present invention. DETAILED DESCRIPTION

[0043] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0045] Electrolytic machining is a special machining technology that performs profiling according to the shape of the tool cathode. It uses the electrochemical reaction of the anode metal to remove the material from the workpiece surface in the form of ions. During machining, the tool cathode is connected to the negative pole of the power supply, and the workpiece anode is connected to the positive pole of the power supply. Under the electrochemical action, hydrogen evolution reaction occurs on the cathode surface, and the anode metal dissolves in the ionic state. The electrolyte flows through the inter-electrode gap at a high speed, providing a medium for the electrochemical reaction, while promptly removing the products generated on the cathode and anode surfaces. With the continuous feeding of the tool cathode, the workpiece shape that meets the requirements is finally machined.

[0046] The present invention provides a probe surface integrated texture electrolytic processing device, such as Figure 1 , Figure 2 and Figure 3As shown, the probe surface integrated texture electrolytic processing device includes: a platform 1, a probe rotation and positioning mechanism 2, an electrolytic processing mechanism 3, an electrochemical workstation 4 and an electrolyte supply mechanism 5; the probe rotation and positioning mechanism 2 is arranged on the platform 1 and can reciprocate in the horizontal direction relative to the platform 1; the probe rotation and positioning mechanism 2 is used to fix and rotate the probe 10; the electrolytic processing mechanism 3 is arranged on the platform 1 and has an electrolytic cathode 30; the electrolytic cathode 30 is located above the probe 10 and can reciprocate in the vertical direction; the anode of the electrochemical workstation 4 is electrically connected to the probe rotation and positioning mechanism 2, and the cathode of the electrochemical workstation 4 is electrically connected to the electrolytic cathode 30; the outlet of the electrolyte supply mechanism 5 extends between the electrolytic processing mechanism 3 and the probe 10 to supply electrolyte.

[0047] Specifically, the probe 10 is a stainless steel probe; when the probe 10 is installed to the probe rotation and positioning mechanism 2, the probe rotation and positioning mechanism 2 can position the probe 10 and rotate the probe 10 to ensure that the microstructure can be uniformly formed on the surface of the probe 10 after electrolytic processing. The probe rotation and positioning mechanism 2 can also reciprocate in the horizontal direction relative to the platform 1, thereby adjusting the position of the probe 10 in the horizontal direction so that the microstructure formed on the surface of the probe 10 can meet the preset length. The electrochemical workstation 4 is used to provide a stable electrolytic power supply to the probe rotation and positioning mechanism 2 and the electrolytic processing mechanism 3 to ensure that the electrochemical reactions (anodic dissolution and cathodic protection) required for the electrolytic processing process proceed normally; and by adjusting the voltage and current output by the electrochemical workstation 4, the requirements of different electrolytic processing depths or speeds can be met.

[0048] The electrolytic machining mechanism 3 is the core part of the electrolytic machining of the probe 10. The electrolytic machining mechanism 3 removes the material on the surface of the probe 10 through the electrochemical reaction between the electrolytic cathode 30 and the anode; in the machining area, the anode metal dissolves in the form of ions. The probe 10 is electrically connected to the anode of the electrochemical workstation 4 through the probe rotation and positioning mechanism 2, and the electrolytic cathode 30 is electrically connected to the cathode of the electrochemical workstation 4. Under the electrochemical action, a hydrogen evolution reaction occurs on the cathode surface, and the anode metal dissolves in the form of ions. The electrolyte flows through the inter-electrode gap at a high speed to provide a medium for the electrochemical reaction, and the products generated on the cathode and anode surfaces are removed in time. With the continuous feeding of the electrolytic cathode 30, and the electrolyte supply mechanism 5 supplies electrolyte to the inter-electrode distance between the electrolytic cathode 30 and the probe 10, a microstructure is finally machined on the surface of the probe 10.

[0049] The present application manufactures a microstructure on the surface of the stainless steel probe 10, and changes the solid-liquid contact state of the stainless steel probe 10 through the microstructure. The formation of the microstructure will increase the roughness of the probe 10 surface, resulting in a decrease in the actual contact area between the liquid and the probe 10 surface. In particular, combining the microstructure with the surface properties of the material itself on the stainless steel material can effectively reduce the contact angle hysteresis of the liquid, and the liquid is easier to roll off the surface, thereby achieving the advantages of no liquid adhesion to the surface of the stainless steel probe 10; the surface of the cylindrical probe 10 is rotationally electrochemically processed by electrolytic processing, and then the microstructure is processed on the entire cylindrical surface of the probe 10. The surface of the probe 10 after electrolytic processing is smooth and has no burrs, which greatly reduces the cross-contamination rate during extraction of multiple samples.

[0050] At the same time, the cathode damage during electrolytic machining is small. Without replacing the electrolytic cathode 30, the circumferential surface of the stainless steel probe 10 can be processed in large quantities for a long time, so that the surface texture of multiple batches of probes 10 can be homogenized. Electrolytic machining utilizes anodic dissolution to remove materials. The edges of the processed texture have no burrs and the texture contour is smooth, which provides a strong condition for sample desorption from the probe 10 surface.

[0051] The probe rotation and positioning mechanism 2 includes a rotating component 21 and a supporting member 22; the rotating component 21 has a probe accommodating position to drive the probe 10 to rotate; the supporting member 22 is arranged relative to the probe accommodating position; the supporting member 22 can slide back and forth relative to the platform 1 and adjust the distance between it and the probe accommodating position to support and release the probe 10; the supporting member 22 is electrically connected to the anode of the electrochemical workstation 4.

[0052] Specifically, the top holding member 22 and the rotating assembly 21 are arranged relative to each other, and the probe accommodation position is located on the side of the rotating assembly 21 facing the top holding member 22; the rotating assembly 21 is used to fix one end of the probe 10 and drive the probe 10 to rotate; after one end of the probe 10 is inserted into the probe accommodation position, the other end of the probe 10 is held by the top holding member 22, so that the stability of the probe rotation positioning mechanism 2 for positioning the probe 10 can be enhanced, and at the same time, the cylindrical probe 10 can be effectively prevented from having a large jump during the rotation process, ensuring the effective completion of the electrolytic processing microstructure on the surface of the probe 10. The top holding member 22 has a brush inside, and the anode of the electrochemical workstation 4 is connected to the internal brush of the top holding member 22 through the anode connecting wire 100.

[0053] The top holding member 22 can slide back and forth relative to the platform 1, and the sliding direction of the top holding member 22 can coincide with the sliding direction of the probe rotation and positioning mechanism 2 as a whole relative to the platform 1; when the top holding member 22 slides, it can slide in a direction away from the rotating assembly 21 to increase the distance between the rotating assembly 21 and the top holding member 22, so as to facilitate the removal of the probe 10 from the probe accommodation position, so as to use the probe 10 with the microstructure generated on the surface later, and to replace the probe 10 to perform electrolytic microstructure processing on multiple probes 10. The top holding member 22 can also slide in a direction close to the rotating assembly 21 to reduce the distance between the rotating assembly 21 and the top holding member 22, so as to cooperate with the rotating assembly 21 to clamp the probe 10, and realize the stable positioning of the probe 10 on the probe rotation and positioning mechanism 2.

[0054] The platform 1 is provided with a first slideway 9, and the probe rotation positioning mechanism 2 is provided on the first slideway 9 and reciprocates along the first slideway 9. The platform 1 is also provided with a motor and a transmission assembly, and the motor is connected to the transmission assembly, and the transmission assembly is connected to the probe rotation positioning mechanism 2, so as to drive the probe 10 rotation mechanism to reciprocate along the first slideway 9 under the drive of the motor. The transmission assembly can be a combination of rollers and belts, or a combination of screw nuts. The present application does not specifically limit the structure of the transmission assembly, and it is only necessary to enable the linear reciprocating sliding of the probe 10 rotation mechanism in the horizontal direction. Similarly, the sliding of the top holding member 22 can also be realized by the existing technology, and it is only necessary to enable the linear reciprocating sliding of the top holding member 22 relative to the rotating assembly 21 in the horizontal direction.

[0055] In one embodiment of the present application, the rotating assembly 21 includes a driver and a three-jaw chuck; the driver is disposed on the platform 1; the three-jaw chuck is connected to the driver so as to rotate along a vertical plane under the drive of the driver; and the probe accommodation position is disposed on the three-jaw chuck.

[0056] Specifically, the three-jaw chuck is located between the driver and the top holding member 22, and the probe receiving position is set at the center of the three-jaw chuck, so as to clamp and fix the end of the probe 10. The driver is connected to the three-jaw chuck and is used to drive the three-jaw chuck to rotate along a vertical plane, thereby driving the probe 10 to rotate around its own central axis along the vertical plane.

[0057] The electrolyte supply mechanism 5 includes an electrolyte cell 51 and an electrolyte circulation mechanism; the electrolyte cell 51 is arranged between the rotating component 21 and the top holding member 22, and is used to receive the electrolyte; the probe 10 is located in the electrolyte cell 51; the electrolyte circulation mechanism is connected to the electrolyte cell 51, and forms an electrolyte circulation flow path.

[0058] Specifically, when the electrolyte is supplied between the electrolytic cathode 30 and the probe 10 , the electrolyte pool 51 is used to collect the electrolyte flowing through the probe 10 and recycle it through the electrolyte circulation mechanism to resupply the electrolyte between the electrolytic cathode 30 and the probe 10 .

[0059] The electrolyte circulation mechanism includes an electrolyte recovery tank 55, a supply pipe 53 and a recovery pipe 54; the electrolyte recovery tank 55 is arranged on the platform 1 and is lower than the electrolyte cell 51; one end of the supply pipe 53 is connected to the electrolyte recovery tank 55 through a water pump 52, and the other end of the supply pipe 53 extends to between the electrolysis cathode 30 and the probe 10; the recovery pipe 54 is respectively connected to the electrolyte recovery tank 55 and the electrolyte cell 51.

[0060] Specifically, the electrolyte recovery tank 55 and the electrolyte cell 51 are both arranged on the platform 1, and the electrolyte recovery tank 55 is connected to the electrolyte cell 51 through two pipelines, one pipeline is the supply pipe 53, and the other pipeline is the recovery pipe 54; under the power of the water pump 52, the electrolyte in the electrolyte recovery tank 55 is sprayed between the electrolysis cathode 30 and the probe 10 through the supply pipe 53, and then flows into the electrolyte cell 51, and flows back to the electrolyte recovery tank 55 through the recovery pipe 54, thereby forming an electrolyte circulation flow path.

[0061] The electrolytic processing mechanism 3 includes an electrolytic fixing unit 31 and a moving unit 32; the electrolytic fixing unit 31 is arranged on the platform 1; the moving unit 32 is arranged on the electrolytic fixing unit 31 and can slide back and forth in the vertical direction relative to the electrolytic fixing unit 31; the electrolytic cathode 30 is arranged at the bottom of the moving unit 32.

[0062] Specifically, the electrolysis fixed unit 31 is relatively fixed to the platform 1 to support and position the mobile unit 32; the mobile unit 32 is used to carry the electrolysis cathode 30, and the electrolysis cathode 30 can also rotate relative to the mobile unit 32; the mobile unit 32 can slide relative to the electrolysis fixed unit 31, thereby driving the electrolysis cathode 30 to slide back and forth in the vertical direction relative to the electrolysis fixed unit 31 (i.e., to perform lifting and sliding) to adjust the distance between the electrolysis cathode 30 and the probe 10, so that the distance between the electrolysis cathode 30 and the probe 10 can reach the preset inter-electrode distance.

[0063] The electrolysis cathode 30 is an electrolysis disc-shaped cathode, and the electrolysis cathode 30 is detachably connected to the mobile unit 32, so that the electrolysis cathode 30 can be disassembled and replaced, and the electrolysis cathode 30 with a different texture form can be replaced; by changing the different surface textures of the cathode body, the surface texture form of the probe 10 can be quickly changed, and the manufacture of probes 10 with different surface textures can be realized, providing customized manufacturing guarantee for the rapid replacement of biochemical analysis technology.

[0064] The probe surface integrated texture electrochemical processing device further includes a CCD image observation system 6 , which is disposed on the platform 1 ; the probe 10 is located within the imaging range of the CCD image observation system 6 .

[0065] The CCD image observation system 6 described in the present application is used to capture the image of the probe 10 surface and the processing area in real time to ensure that the electrolysis process proceeds normally; and through image feedback, it can be verified whether the inter-electrode distance between the electrolytic cathode 30 and the probe 10 meets the preset requirements to avoid poor processing effect or damage to the probe 10 due to inter-electrode distance deviation. By acquiring the image of the probe 10 through the CCD image observation system 6, it is also possible to observe the formation of micro-texture on the surface of the probe 10 and check whether the surface of the probe 10 is uniform and free of defects (such as burrs, excessive corrosion or unprocessed areas); if unevenness or abnormality occurs during processing, the processing parameters (such as the output current and voltage of the electrochemical workstation 4, the position of the electrolytic cathode 30, etc.) can be adjusted through image feedback to optimize the quality.

[0066] The probe surface integrated texture electrolytic processing device also includes a first direction adjustment mechanism 7 and a second direction adjustment mechanism 8; the first direction adjustment mechanism 7 is arranged on the platform 1 and connected to the CCD image observation system 6 to drive the CCD image observation system 6 to slide back and forth along the first direction; the first direction is parallel to the sliding direction of the probe rotation positioning mechanism 2; the second direction adjustment mechanism 8 is arranged on the platform 1 and connected to the first direction adjustment mechanism 7 to drive the first direction adjustment mechanism 7 to slide back and forth along the second direction; the second direction is coplanar with the first direction and perpendicular to each other.

[0067] The first direction adjustment mechanism 7 and the second direction adjustment mechanism 8 cooperate with each other to adjust the position of the CCD image observation system 6, so that the CCD image observation system 6 can reach the area where photography is required, so that the photography range of the CCD image observation system 6 is wider and can better meet the needs. The first direction and the second direction are both horizontal directions, and the first direction and the second direction are perpendicular to each other, and the first direction is parallel to the sliding direction of the probe rotation positioning mechanism 2, so that the CCD image observation system 6 can achieve position adjustment in two directions in the horizontal plane.

[0068] Based on the same movement principle as the probe rotation positioning mechanism 2 and the supporting member 22 , the specific structures of the first direction adjustment mechanism 7 and the second direction adjustment mechanism 8 are not further described in the present application.

[0069] Based on any one of the above probe surface integrated texture electrolytic processing devices, the present application also provides a control method, such as Figure 4 As shown, the control method comprises the following steps:

[0070] S100, assembling the probe to be electrolyzed into the probe rotation and positioning mechanism, and starting the probe rotation and positioning mechanism to rotate the probe to be electrolyzed;

[0071] Specifically, before the step of assembling the probe to be electrolyzed into the probe rotation and positioning mechanism 2 and starting the probe rotation and positioning mechanism 2 to rotate the probe to be electrolyzed, the method further includes:

[0072] The electrolysis probe is cleaned in an acetone bath using an ultrasonic cleaning machine for 5 minutes, and organic and inorganic pollutants on the surface of the probe 10 are removed using isopropyl alcohol and deionized water respectively. After cleaning, the probe 10 is blown dry using nitrogen gas;

[0073] The anode of the electrochemical workstation 4 is connected to the brush of the top holder 22 via an anode connecting line 100 , and the cathode of the electrochemical workstation 4 is connected to the brush of the electrolytic cathode 30 via a cathode connecting line 200 .

[0074] In one embodiment of the present application, when the probe rotation and positioning mechanism 2 rotates the probe to be electrolyzed, the rotation speed of the probe to be electrolyzed is 5 rpm; that is, the rotation speed of the three-jaw chuck is set to 5 rpm.

[0075] The step of assembling the probe to be electrolyzed into the probe rotation and positioning mechanism 2 is as follows:

[0076] Move the supporting member 22 away from the rotating assembly 21 so that the distance between the rotating assembly 21 and the supporting member 22 is greater than the length of the probe to be electrolyzed;

[0077] Insert one end of the probe to be electrolyzed into the probe receiving position, and tighten the three-jaw chuck;

[0078] The supporting member 22 is moved toward the rotating assembly 21 until the supporting member 22 is pressed against the probe to be electrolyzed.

[0079] S200, controlling the electrolysis cathode to move toward the probe to be electrolyzed until the distance between the electrolysis cathode and the probe to be electrolyzed reaches a preset inter-electrode distance;

[0080] The preset inter-electrode distance is 5 μm; the distance between the electrolysis cathode 30 and the probe to be electrolyzed is the distance in the vertical direction. When the distance between the electrolysis cathode 30 and the probe to be electrolyzed reaches 5 μm, the electrolysis cathode 30 stops descending, and the electrolysis cathode 30 is controlled to rotate relative to the moving unit 32. The rotation speed of the electrolysis cathode 30 relative to the moving unit 32 is 1 rpm.

[0081] S300, turning on the electrolyte supply mechanism and the electrochemical workstation, and controlling the probe rotation and positioning mechanism to reciprocate in a horizontal direction according to a preset processing length.

[0082] Specifically, since the electrolytic cathode 30 can only correspond to a small area on the probe to be electrolyzed, in order to form a microstructure of a preset processing length on the surface of the probe to be electrolyzed, it is necessary to control the probe rotation and positioning mechanism 2 to move back and forth in the horizontal direction so that the probe to be electrolyzed can form a microstructure of a preset processing length after moving. According to the processing requirements, the electrolytic processing can be stopped when the preset processing length of the surface of the probe 10 is covered with texture.

[0083] In summary, the present application provides a probe surface integrated texturing electrolytic processing device and a control method thereof, which include: a platform; a probe rotation positioning mechanism, which is arranged on the platform and can reciprocate in a horizontal direction relative to the platform; the probe rotation positioning mechanism is used to fix and rotate the probe; an electrolytic processing mechanism, which is arranged on the platform and has an electrolytic cathode; the electrolytic cathode is located above the probe and can slide back and forth in a vertical direction; an electrochemical workstation, whose anode is electrically connected to the probe rotation positioning mechanism, and whose cathode is electrically connected to the electrolytic cathode; an electrolyte supply mechanism; the outlet of the electrolyte supply mechanism extends between the electrolytic processing mechanism and the probe to supply electrolyte. In the present application, the probe is electrically connected to the anode of the electrochemical workstation through the probe rotation positioning mechanism, and the electrolytic cathode is electrically connected to the cathode of the electrochemical workstation. Under the electrochemical action, a hydrogen evolution reaction occurs on the cathode surface, and the anode metal dissolves in an ionic state. The electrolyte flows through the inter-electrode gap at a high speed to provide a medium for the electrochemical reaction, and at the same time, the products generated on the cathode and anode surfaces are promptly removed. With the continuous feeding of the electrolytic cathode and the electrolyte supply mechanism supplying electrolyte to the inter-electrode distance between the electrolytic cathode and the probe, a microstructure is finally processed on the probe surface, and the stainless steel probe is changed by the microstructure. The solid-liquid contact state of the needle and the formation of microstructure will increase the roughness of the probe surface, resulting in a decrease in the actual contact area between the liquid and the probe surface. Especially on stainless steel materials, the combination of microstructure and the surface properties of the material itself can effectively reduce the contact angle hysteresis of the liquid, and the liquid is easier to roll off the surface, thereby achieving the advantages of the stainless steel probe surface not being attached by the liquid; the cylindrical probe surface is subjected to rotational electrolytic machining by electrolytic machining, and then the microstructure is machined on the entire cylindrical surface of the probe. The surface of the probe after electrolytic machining is smooth and burr-free, which greatly reduces the cross-contamination rate during multi-sample extraction.

[0084] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A probe surface integrated texture electrolytic processing device, characterized in that: It includes: platform; The probe rotation positioning mechanism is arranged on the platform and can reciprocate in the horizontal direction relative to the platform; The probe rotation and positioning mechanism is used to fix and rotate the probe; An electrolytic machining mechanism is disposed on the platform and has an electrolytic cathode; the electrolytic cathode is located above the probe and can slide back and forth in a vertical direction; An electrochemical workstation, whose anode is electrically connected to the probe rotation and positioning mechanism, and whose cathode is electrically connected to the electrolytic cathode; An electrolyte supply mechanism; the outlet of the electrolyte supply mechanism extends between the electrolytic machining mechanism and the probe to supply electrolyte.

2. The probe surface integrated texture electrochemical processing device according to claim 1, characterized in that: The probe rotation positioning mechanism comprises: A rotating assembly having a probe receiving position to drive the probe to rotate; The supporting member is arranged opposite to the probe receiving position; the supporting member can slide back and forth relative to the platform and adjust the distance between the supporting member and the probe receiving position to support and release the probe; the supporting member is electrically connected to the anode of the electrochemical workstation.

3. The probe surface integrated texture electrolytic processing device according to claim 2, characterized in that: The electrolyte supply mechanism comprises: An electrolyte tank is disposed between the rotating assembly and the top holding member and is used to receive electrolyte; the probe is located in the electrolyte tank; The electrolyte circulation mechanism is connected to the electrolyte cell to form an electrolyte circulation flow path.

4. The probe surface integrated texture electrolytic processing device according to claim 3, characterized in that: The electrolyte circulation mechanism comprises: An electrolyte recovery tank is disposed on the platform and is lower than the electrolyte tank; A supply pipe, one end of which is connected to the electrolyte recovery tank through a water pump, and the other end of which extends between the electrolysis cathode and the probe; The recovery pipe is connected to the electrolyte recovery tank and the electrolyte cell respectively.

5. The probe surface integrated texture electrolytic processing device according to claim 2, characterized in that: The rotating assembly comprises: A driver, disposed on the platform; The three-jaw chuck is connected to the driver so as to rotate along a vertical plane under the drive of the driver; the probe accommodation position is arranged on the three-jaw chuck.

6. The probe surface integrated texture electrochemical processing device according to claim 1, characterized in that: The electrolytic machining mechanism comprises: An electrolysis fixing unit is arranged on the platform; The movable unit is arranged on the electrolysis fixed unit and can slide back and forth in a vertical direction relative to the electrolysis fixed unit; the electrolysis cathode is arranged at the bottom of the movable unit.

7. The probe surface integrated texture electrochemical processing device according to claim 1, characterized in that: It also includes: A CCD image observation system is arranged on the platform; and the probe is located within the imaging range of the CCD image observation system.

8. The probe surface integrated texture electrochemical processing device according to claim 7, characterized in that: It also includes: A first direction adjustment mechanism is disposed on the platform and connected to the CCD image observation system to drive the CCD image observation system to slide back and forth along a first direction; the first direction is parallel to the sliding direction of the probe rotation positioning mechanism; The second direction adjustment mechanism is arranged on the platform and connected with the first direction adjustment mechanism to drive the first direction adjustment mechanism to slide back and forth along a second direction; the second direction is coplanar with the first direction and perpendicular to each other.

9. A control method based on the probe surface integrated texture electrochemical processing device according to any one of claims 1 to 8, characterized in that: It includes the following steps: Assembling the probe to be electrolyzed into the probe rotation and positioning mechanism, and starting the probe rotation and positioning mechanism to rotate the probe to be electrolyzed; Controlling the electrolysis cathode to move toward the probe to be electrolyzed until the distance between the electrolysis cathode and the probe to be electrolyzed reaches a preset inter-electrode distance; The electrolyte supply mechanism and the electrochemical workstation are turned on, and the probe rotation and positioning mechanism is controlled to reciprocate in the horizontal direction according to a preset processing length.

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