Metallographic sample grinding machine

Abstract

The utility model is suitable for the technical field of metallographic specimen grinding, and provides a metallographic specimen grinding machine which comprises a rack body and a camera mechanism arranged on the rack body, the metallographic specimen is fixedly sealed in the transparent mold box, when the transparent mold box is located at the camera shooting position, the camera shooting mechanism is used for shooting image information of the metallographic specimen, and the camera shooting mechanism comprises a focusing unit and a camera shooting unit; the focusing unit comprises a sliding plate, a guide rail plate and a first driving device; the sliding plate is slidably connected with the guide rail plate; a long-strip-shaped guide rail sliding groove is formed in the side face of the guide rail plate, and the guide rail sliding groove is arranged in the direction parallel to the optical axis. The side face of the sliding plate is provided with a sliding strip corresponding to the guide rail sliding groove, and the sliding strip is embedded in the guide rail sliding groove in a sliding mode. The first driving device is in transmission connection with the sliding plate and used for driving the sliding plate to slide on the guide rail plate; the camera unit is connected to the sliding plate. Therefore, the grinding machine for the metallographic specimen can obtain a clear image of the metallographic specimen.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding metallographic samples, in particular to a grinding machine for metallographic samples. Background Art

[0002] Metallographic specimen preparation is a common and important method for observing the cross-sectional structure of samples. It can be used for a variety of materials, including metals, alloys, ceramics, composite materials, electronic circuit boards, integrated chips, etc. The sample is encapsulated with a special liquid resin and then ground and polished. It is widely used in the electronics industry, metal / plastic / ceramic products, and automotive parts and accessories manufacturing. It can be used for communication equipment, scientific research, and for observing the structure of electronic components. Examples include flip chips, aluminum / copper process structures, COMS, POP, PCB structure and through-hole observation, PCBA solder joint observation, LED structure observation, IMC observation, capacitors, paint thickness, plating, and metal and component structure observation. A metallographic specimen grinder is essential equipment for the grinding and polishing process.

[0003] Before the grinding and polishing of the metallographic specimen, there are also steps such as alignment and feeding. During the use of the existing metallographic specimen grinding machine, as the market demand changes and customer requirements increase, the original mechanism cannot fully meet the new needs. In the alignment step, it is necessary to capture clear image information of the metallographic specimen through a camera mechanism, determine the grinding line of the metallographic specimen based on the image information, and rotate the metallographic specimen so that the grinding line is aligned with the preset zero line to complete the alignment. With the diversification of metallographic specimens, the position of the metallographic specimen sealed in the transparent mold box has also changed, which has caused the object distance from the camera and lens in the camera mechanism to the metallographic specimen to change. Since the depth of field of the lens is short, the change in object distance can easily lead to defocus, making it impossible to capture a clear image of the metallographic specimen.

[0004] During the feeding process, a feeding mechanism delivers a transparent mold box containing a metallographic specimen to a pre-set gripping position. The gripping mechanism then grabs the transparent mold box and moves it to the camera position, where the camera captures the image of the metallographic specimen. Due to changing process requirements, metallographic specimens are becoming increasingly diverse, with varying sizes. Consequently, the specifications of the transparent mold boxes used to seal the specimens have also changed, leading to incompatibility between the feeding mechanism and the transparent mold boxes.

[0005] In summary, the existing structure has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the present invention is to provide a metallographic sample grinding machine that can obtain clear images of the metallographic sample.

[0007] In order to achieve the above-mentioned object, the utility model provides a metallographic sample grinding machine, comprising a frame body and a camera mechanism, wherein the camera mechanism is arranged on the frame body; the metallographic sample is sealed in a transparent mold box, and when the transparent mold box is in a camera position, the camera mechanism is used to capture image information of the metallographic sample, and the camera mechanism comprises:

[0008] A focusing unit is configured to move the camera unit along the direction of the optical axis to adjust the object distance between the camera unit and the metallographic specimen; the focusing unit comprises: a sliding plate, a guide rail plate, and a first driving device; the sliding plate is slidably connected to the guide rail plate; a side surface of the guide rail plate is provided with an elongated guide rail groove, the guide rail groove being arranged parallel to the direction of the optical axis; a side surface of the sliding plate is provided with a sliding bar corresponding to the guide rail groove, the sliding bar being slidably embedded in the guide rail groove; the first driving device is transmission-connected to the sliding plate, and is configured to drive the sliding plate to slide on the guide rail plate;

[0009] The camera unit is used to capture image information of the metallographic sample, and the camera unit is connected to the sliding plate.

[0010] According to the grinding machine for metallographic samples, the imaging mechanism also includes a controller, which is electrically connected to the imaging unit, and the controller obtains image information of the metallographic sample captured by the imaging unit; the controller is electrically connected to the first driving device, and the controller performs clarity judgment based on the image information to obtain a clarity result, and controls the operation of the first driving device based on the clarity result.

[0011] According to the metallographic sample grinding machine, the first driving device includes a first support seat, a driving motor, a screw and a nut; the driving motor is installed on the first support seat; the output shaft of the driving motor is transmission connected to the screw, and the nut is sleeved on the screw; the nut is transmission connected to the sliding plate.

[0012] According to the metallographic specimen grinding machine, the camera unit is connected to the sliding plate via a second support base;

[0013] The second support seat is provided with a channel adapted to the screw rod, and the screw rod passes through the channel; the nut is connected to the second support seat and is transmission-connected to the sliding plate through the second support seat.

[0014] According to the metallographic sample grinding machine, the first driving device includes a third support seat and a first driving cylinder; the first driving cylinder is installed on the third support seat; the first piston rod of the first driving cylinder is transmission-connected to the sliding plate.

[0015] According to the metallographic sample grinding machine, the imaging unit includes a lens and a camera; the lens obtains light information of the metallographic sample, and the camera obtains image information of the metallographic sample based on the light information;

[0016] The camera mechanisms are symmetrically arranged in two groups.

[0017] According to the metallographic sample grinding machine, it also includes a feeding mechanism, which is arranged on the frame body; the feeding mechanism includes a feeding device, a second driving device and a horizontally arranged base plate; the feeding device and the second driving device are installed on the base plate;

[0018] The feeding device includes a guide rail, a slider, a support stand, and an elongated feeding trough extending toward a preset material grabbing position; the slider is slidably arranged on the guide rail; the support stand is arranged on the slider; the feeding trough is arranged on the support stand at an angle relative to the substrate; the bottom end of the feeding trough is connected to a horizontally arranged loading port; the feeding trough is used to store a transparent mold box sealed with the metallographic sample and to deliver the transparent mold box to the loading port;

[0019] The second driving device is in transmission connection with the feeding device to drive the loading port to move to the material grabbing position.

[0020] According to the metallographic sample grinding machine, the support stand is in the shape of a right triangle, the right-angled side of the support stand is arranged on the slider; the feed trough is arranged on the oblique side of the support stand; the feed trough is detachably connected to the support stand.

[0021] According to the metallographic sample grinding machine, the second driving device includes a second driving cylinder, and the second piston rod of the second driving cylinder is drivingly connected to the feeding device;

[0022] The feeding devices are provided in two groups and are symmetrically distributed on both sides of the second driving cylinder.

[0023] According to the metallographic sample grinding machine, a counterweight pushing block is slidably provided in the feed trough, and the counterweight pushing block contacts the feed trough via a rolling wheel.

[0024] The metallographic specimen grinding machine of the present invention, during the alignment process, is provided with a focusing unit in the camera mechanism to adapt to the positional changes of the metallographic specimen within the transparent mold box and ensure that the camera unit of the camera mechanism does not lose focus. The camera mechanism is then moved along the optical axis to adjust the object distance, thereby achieving a focusing effect and obtaining a clear image of the metallographic specimen. Specifically, the camera mechanism includes a focusing unit and a camera unit. The focusing unit drives the camera unit to move back and forth along the optical axis to adjust the object distance between the camera unit and the metallographic specimen. The focusing unit includes a sliding plate, a guide plate, and a first drive device. The first drive device can drive the sliding plate to move along the guide plate along the optical axis. Since the camera unit is connected to the sliding plate, the sliding plate can drive the camera unit to move along the optical axis, thereby adjusting the object distance between the camera unit and the metallographic specimen and obtaining a clear image of the metallographic specimen. For example, during the alignment process, when the camera mechanism acquires image information of the metallographic specimen, it is assumed that the side of the transparent mold box facing the camera mechanism is the front side of the transparent mold box, and the other side facing the transparent mold box is the back side of the transparent mold box. The side of the metallographic sample that needs to capture image information is the front side of the metallographic sample, that is, the front side of the metallographic sample faces the camera, and the other side is the back side of the metallographic sample. Figure 1a As shown, under normal circumstances, for a conventional metallographic sample, the front of the metallographic sample is flat. When the metallographic sample is sealed inside the transparent mold box, the front of the metallographic sample is in close contact with the front of the transparent mold box. When the transparent mold box is in the camera position, the object distance between the front of the metallographic sample and the lens of the camera mechanism is H1. When the object distance is H1, the camera mechanism can capture a clear image of the metallographic sample. Figure 1b As shown, under special circumstances, for special metallographic specimens, there are other components protruding on the front of the metallographic specimen, which results in the front of the metallographic specimen being unable to be in close contact with the front of the transparent mold box when the metallographic specimen is sealed to the inner side of the transparent mold box, so that the back of the metallographic specimen is in close contact with the back of the transparent mold box, and the front of the metallographic specimen is still facing the camera mechanism. At this time, the front of the metallographic specimen is away from the front of the transparent mold box, so that the object distance between the front of the metallographic specimen and the lens of the camera mechanism is H2. Since the depth of field is very short, when the object distance changes from H1 to H2, the object distance increases by D1, resulting in defocus, and the image of the metallographic specimen obtained is not clear. Since the camera unit is out of focus, the focusing unit controls the camera unit to move along the direction of the optical axis until the camera unit can obtain a clear image of the metallographic specimen, and the focusing is completed. At this time, the focusing unit controls the camera unit to move a distance D2 along the direction of the optical axis, and the object distance between the camera unit and the metallographic specimen is H3 (see Figure 1c), theoretically, when D2 is equal to D1 and H3 is equal to H1, the camera unit can obtain a clear image of the metallographic sample, and the specific D2 value can be obtained through test calibration. In the feeding link, the feeding mechanism sends the transparent mold box sealed with the metallographic sample to the preset grabbing position, so that the grabbing mechanism grabs the transparent mold box from the grabbing position and moves it to the camera position, and then the camera mechanism obtains the image information of the metallographic sample. Specifically, the feeding mechanism includes a feeding device, a second driving device and a horizontally arranged substrate; the feeding device and the second driving device are installed on the substrate; the feeding device can send the transparent mold box to the loading port; the second driving device is in transmission connection with the feeding device, and can drive the loading port to move to the grabbing position, so that the transparent mold box located at the loading port can be grabbed from the grabbing position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1a This is a schematic diagram of a state in which a metallographic specimen provided by an embodiment of the present invention is sealed inside a transparent mold box, the front surface of the metallographic specimen is placed in close contact with the front surface of the transparent mold box, and the object distance between the front surface of the metallographic specimen and the lens of the imaging mechanism is H1; the dotted line indicates the optical axis;

[0026] Figure 1b This is a schematic diagram of a state in which a metallographic specimen provided by one embodiment of the present invention is sealed inside a transparent mold box, the back of the metallographic specimen is placed against the back of the transparent mold box, and the object distance between the front of the metallographic specimen and the lens of the imaging mechanism is H2; the dotted line indicates the optical axis;

[0027] Figure 1c This is a schematic diagram of a state in which a metallographic specimen provided by one embodiment of the present invention is sealed inside a transparent mold box, the back of the metallographic specimen is placed against the back of the transparent mold box, and the object distance between the front of the metallographic specimen and the lens of the imaging mechanism is H3; the dotted line indicates the optical axis;

[0028] Figure 2 This is a schematic structural diagram of a metallographic sample grinding machine provided by one embodiment of the present utility model;

[0029] Figure 3 : is a structural diagram of a camera mechanism provided by an embodiment of the present invention; the dotted line is used to indicate the optical axis;

[0030] Figure 4 This is a structural diagram of a feeding mechanism provided by an embodiment of the present utility model;

[0031] Figure 5 This is a structural diagram of a feeding mechanism in which a feeding trough and a supporting stand are integrally formed, provided by an embodiment of the present invention;

[0032] Figure 6It is a structural schematic diagram of a feeding mechanism in which a feeding trough and a supporting stand are detachably connected, provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0037] See Figure 1~ Figure 3In one embodiment of the present invention, a metallographic sample grinding machine 100 is provided, comprising a frame body 10 and a camera mechanism 20. The camera mechanism 20 is disposed on the frame body 10. The metallographic sample 200 is sealed in a transparent mold box 300. When the transparent mold box 300 is in a camera position, the camera mechanism 20 is used to capture image information of the metallographic sample 200. The camera mechanism 20 includes:

[0038] The focusing unit 21 is used to move the camera unit 22 along the direction of the optical axis to adjust the object distance between the camera unit 22 and the metallographic specimen 200. The focusing unit 21 includes a sliding plate 211, a guide plate 212, and a first driving device. The sliding plate 211 is slidably connected to the guide plate 212. The side of the guide plate 212 is provided with an elongated guide groove 2121, which is arranged parallel to the direction of the optical axis. The side of the sliding plate 211 is provided with a sliding bar 2111 corresponding to the guide groove 2121, and the sliding bar 2111 is slidably embedded in the guide groove 2121. The first driving device is transmission-connected to the sliding plate 211, and is used to drive the sliding plate 211 to slide on the guide plate 212.

[0039] The camera unit 22 is used to capture image information of the metallographic sample 200 . The camera unit 22 is connected to the sliding plate 211 .

[0040] In this embodiment, the imaging mechanism 20 includes a focusing unit 21 and a camera unit 22. The focusing unit 21 can be used to reciprocate the camera unit 22 to adjust the object distance, thereby achieving a focusing effect and obtaining a clear image of the metallographic sample 200. Specifically, the optical axis can be referred to as the central axis of the camera unit 22, and is also the line connecting the camera unit 22 and the object (metallographic sample 200). The focusing unit 21 drives the camera unit 22 to move along the optical axis to adjust the object distance between the camera unit 22 and the metallographic sample 200. The focusing unit 21 includes a sliding plate 211, a guide plate 212, and a first driving device. The first driving device can drive the sliding plate 211 to move on the guide plate 212 along the optical axis. Since the camera unit 22 is connected to the sliding plate 211, the sliding plate 211 can drive the camera unit 22 to move along the optical axis, thereby adjusting the object distance between the camera unit 22 and the metallographic sample 200 and obtaining a clear image of the metallographic sample 200. For example, when the transparent mold box 300 is located at the camera position, see Figure 1a Under normal circumstances, the front side of the metallographic sample 200 (the side facing the camera unit 22) is placed close to the front side of the transparent mold box 300 (the side facing the camera unit 22). At this time, the object distance between the camera unit 22 and the metallographic sample 200 is H1, and the camera unit 22 can obtain a clear image of the metallographic sample 200. Figure 1bIn a special case, the back of the metallographic sample 200 is placed close to the back of the transparent mold box 300, that is, the front of the metallographic sample 200 is away from the front of the transparent mold box 300. At this time, the object distance between the camera unit 22 and the metallographic sample 200 is H2, H2 is greater than H1, and the distance H2 increases relative to H1 is D1. Figure 1c Since the camera unit 22 is out of focus, the focusing unit 21 controls the camera unit 22 to move along the optical axis until the camera unit 22 can obtain a clear image of the metallographic sample 200, and the focusing is completed. At this time, the focusing unit 21 controls the camera unit 22 to move along the optical axis by a distance D2, and the object distance between the camera unit 22 and the metallographic sample 200 is H3. Theoretically, when D2 is equal to D1 and H3 is equal to H1, the camera unit 22 can obtain a clear image of the metallographic sample 200. Of course, the specific value of D2 can be determined by manual testing and calibration based on the clarity of the image of the metallographic sample 200 obtained, or it can be determined by a controller. The sliding plate 211 and the guide plate 212 of the focusing unit 21 are both plate-shaped, so that the camera unit 22 can be stably set on the slide plate. The guide rail plate 212 may optionally be provided with guide rail grooves 2121 on both sides thereof, and two sliding bars 2111 are respectively provided on the two sides of the sliding plate 211 corresponding to the two guide rail grooves 2121 to improve the stability of the sliding plate 211 moving along the optical axis on the guide rail plate 212.

[0041] As an optional embodiment, the imaging mechanism 20 further includes a controller, which is electrically connected to the imaging unit 22, and the controller obtains image information of the metallographic sample 200 captured by the imaging unit 22; the controller is electrically connected to the first driving device, and the controller performs clarity judgment based on the image information to obtain a clarity result, and controls the operation of the first driving device based on the clarity result.

[0042] In this embodiment, the controller can determine the clarity of the image of the metallographic sample 200. When the clarity of the image of the metallographic sample 200 is unqualified, the controller controls the focusing unit 21 to drive the camera unit 22 to move a preset distance. The controller can compare the clarity of the current image of the metallographic sample 200 with the clarity of the historical image of the metallographic sample 200 to control the focusing unit 21 to drive the camera unit 22 to move closer to or away from the metallographic sample 200.

[0043] See also Figure 3 As an optional embodiment, the first driving device includes a first support base 2131, a driving motor 2132, a screw rod 2133 and a nut; the driving motor 2132 is installed on the first support base 2131; the output shaft of the driving motor 2132 is transmission connected to the screw rod 2133, and the nut is sleeved on the screw rod 2133; the nut is transmission connected to the sliding plate 211.

[0044] In this embodiment, the drive motor 2132 can drive the nut sleeve to reciprocate on the screw rod 2133 by rotating forward or reverse. Since the nut is in driving connection with the sliding plate 211, and the sliding plate 211 is restricted by the guide plate 212 to move along the optical axis, the nut can convert the rotational motion of the screw rod 2133 into linear motion along the optical axis.

[0045] See also Figure 3 As an optional embodiment, the camera unit 22 is connected to the sliding plate 211 through the second support base 24;

[0046] The second support base 24 is provided with a channel 241 adapted to the screw rod 2133 , and the screw rod 2133 passes through the channel 241 ; the nut is connected to the second support base 24 and is transmission-connected to the sliding plate 211 through the second support base 24 .

[0047] In this embodiment, the second support base 24 can support and mount the camera unit 22 on the sliding plate 211, so that the camera unit 22 can stably follow the sliding plate 211 in reciprocating motion along the optical axis. The second support base 24 can also support a screw rod 2133 and a nut. The screw rod 2133 can rotate within the channel 241. The nut is connected to the second support base 24 and then transmitted to the sliding plate 211 through the second support base 24, thereby driving the sliding plate 211 to reciprocate along the optical axis.

[0048] As an optional embodiment, the first driving device includes a third support base and a first driving cylinder; the first driving cylinder is installed on the third support base; and the first piston rod of the first driving cylinder is transmission-connected to the sliding plate 211 .

[0049] In this embodiment, the piston rod of the first driving cylinder can perform telescopic motion, thereby driving the sliding plate 211 to perform reciprocating motion.

[0050] See also Figure 3 As an optional embodiment, the imaging unit 22 includes a lens 221 and a camera 222; the lens 221 obtains light information of the metallographic sample 200, and the camera 222 obtains image information of the metallographic sample 200 based on the light information;

[0051] The imaging mechanisms 20 are symmetrically provided in two groups.

[0052] In this embodiment, the camera 222 has an image sensor that can convert light information into image information. Two sets of imaging mechanisms 20 are provided to improve work efficiency.

[0053] See also Figures 4 to 6As an optional embodiment, the metallographic specimen grinding machine 100 further includes a feeding mechanism 30, which is disposed on the frame body 10; the feeding mechanism 30 includes a feeding device 31, a second driving device 32, and a horizontally disposed base plate 33; the feeding device 31 and the second driving device 32 are mounted on the base plate 33;

[0054] The feeding device 31 includes a guide rail 311 extending toward a predetermined material grabbing position, a slider 312, a support stand 313, and an elongated feeding trough 314. The slider 312 is slidably mounted on the guide rail 311. The support stand 313 is mounted on the slider 312. The feeding trough 314 is tilted relative to the base plate 33 and mounted on the support stand 313. The bottom end of the feeding trough 314 is connected to a horizontally disposed loading port 3141. The feeding trough 314 is used to store the transparent mold box 300 encapsulating the metallographic specimen 200 and to deliver the transparent mold box 300 to the loading port 3141.

[0055] The second driving device 32 is in transmission connection with the feeding device 31 to drive the loading port 3141 to move to the material grabbing position.

[0056] In this embodiment, during the feeding process, the feeding mechanism 30 delivers the transparent mold box 300 sealed with the metallographic sample 200 to a preset grabbing position, so that the grabbing mechanism can grab the transparent mold box 300 from the grabbing position and move it to the camera position, and then the camera 20 can obtain the image information of the metallographic sample 200. Specifically, the feeding mechanism 30 includes a feeding device 31, a second driving device 32 and a horizontally arranged substrate 33; the feeding device 31 and the second driving device 32 are installed on the substrate 33; the feeding device 31 can deliver the transparent mold box 300 to the loading port 3141. Specifically, the transparent mold box 300 sealed with the metallographic sample 200 is sequentially arranged in the feeding trough 314. Since the feeding trough 314 is tilted, the transparent mold box 300 can slide to the loading port 3141 in sequence by gravity; a counterweight push block 34 is optionally slidably provided in the feeding trough 314. The counterweight pushing block 34 contacts the feeding trough 314 through the rolling wheel, and the counterweight pushing block 34 pushes the transparent mold box 300 at the top. The gravity of the counterweight pushing block 34 is used to make the transparent mold box 300 in the feeding trough 314 always be pushed downward. When the loading is completed, the transparent mold box 300 located at the loading port 3141 is grabbed, and the transparent mold box 300 stored in the feeding trough 314 relies on the gravity of the counterweight pushing block 34 to automatically fill the next transparent mold box 300 to the loading port 3141, completing the automatic feeding and preparing for the next loading. The second driving device 32 is in transmission connection with the feeding device 31. Since the slider 312 can move along the guide rail 311 toward the preset grabbing position, when the second driving device 32 is working, it can drive the support frame 313 provided on the slider 312 to move along the guide rail 311 toward the preset grabbing position, and further drive the loading port 3141 to move to the grabbing position, so that the transparent mold box 300 located at the loading port 3141 can be grabbed from the grabbing position. Figures 4 to 6 As shown, the feed trough 314 can be integrally formed with the support stand 313 , and the feed trough 314 can also be detachably connected to the support stand 313 .

[0057] See also Figure 6 As an optional embodiment, the support stand 313 is in the shape of a right triangle, and the right-angled side of the support stand 313 is set on the slider 312; the feed trough 314 is set on the oblique side of the support stand 313; the feed trough 314 is detachably connected to the support stand 313.

[0058] In this embodiment, because the feed trough 314 needs to be tilted relative to the horizontal plane, it is positioned on one side of the hypotenuse of a right-angled triangle-shaped support stand 313. One side of the right-angled side of the support stand 313 is mounted on the slider 312. Due to varying process requirements, metallographic specimens 200 vary in size. Standard transparent mold boxes 300 can be used for metallographic specimens 200 of conventional and substandard sizes. However, larger-sized transparent mold boxes 300 are required. The increased size of the transparent mold box 300 makes the feed trough 314 incompatible with larger-sized transparent mold boxes 300. Therefore, the feed trough 314 is detachably connected to the support stand 313, allowing for the selection of a suitable feed trough 314 based on the size of the transparent mold box 300, thereby improving practicality.

[0059] See also Figure 4 As an optional embodiment, the second driving device 32 includes a second driving cylinder 321, and the second piston rod 322 of the second driving cylinder 321 is transmission-connected to the feeding device 31;

[0060] There are two feeding devices 31 , which are symmetrically distributed on both sides of the second driving cylinder 321 .

[0061] In this embodiment, a second driving cylinder 321 is mounted on a base plate 33. One end of a second piston rod 322 of the second driving cylinder 321 is connected to the support stand 313. When the second piston rod 322 is extended, the entire support stand 313 is pushed out, and the transparent mold box 300 located at the loading port 3141 is delivered to a preset grabbing position. The transparent mold box 300 is then grabbed by the grabbing mechanism, completing the loading operation. Two feeding devices 31 are provided to improve work efficiency. Since they are symmetrically distributed on both sides of the second driving cylinder 321, one second driving cylinder 321 can drive both feeding devices 31. Of the two symmetrically distributed feeding devices 31, the feeding trough 314 of one feeding device 31 can optionally be integrally formed with the support stand 313, while the feeding trough 314 of the other feeding device 31 can be detachably connected to the support stand.

[0062] In summary, in the metallographic sample grinding machine of the present invention, in the alignment link, in order to adapt to the change of the position of the metallographic sample in the transparent mold box and ensure that the camera unit of the camera mechanism does not lose focus, a focusing unit is set in the camera mechanism, and the object distance is adjusted by moving the camera unit along the direction of the optical axis, thereby achieving the focusing effect and obtaining a clear image of the metallographic sample. Specifically, the camera mechanism includes a focusing unit and a camera unit. The focusing unit drives the camera unit to move back and forth along the direction of the optical axis to adjust the object distance between the camera unit and the metallographic sample; the focusing unit includes a sliding plate, a guide plate and a first driving device; the first driving device can drive the sliding plate to move on the guide plate along the direction of the optical axis. Since the camera unit is connected to the sliding plate, the sliding plate can drive the camera unit to move along the direction of the optical axis, thereby adjusting the object distance between the camera unit and the metallographic sample and obtaining a clear image of the metallographic sample. For example, in the alignment process, when the camera mechanism obtains the image information of the metallographic sample, it is assumed that the side of the transparent mold box facing the camera mechanism is the front side of the transparent mold box, and the other side opposite is the back side of the transparent mold box. The side of the metallographic sample whose image information needs to be captured is the front side of the metallographic sample, that is, the front side of the metallographic sample faces the camera mechanism, and the other side opposite is the back side of the metallographic sample. Figure 1a As shown, under normal circumstances, for a conventional metallographic sample, the front of the metallographic sample is flat. When the metallographic sample is sealed inside the transparent mold box, the front of the metallographic sample is in close contact with the front of the transparent mold box. When the transparent mold box is in the camera position, the object distance between the front of the metallographic sample and the lens of the camera mechanism is H1. When the object distance is H1, the camera mechanism can capture a clear image of the metallographic sample. Figure 1bAs shown in FIG, under special circumstances, for a special metallographic specimen, there are other components protruding on the front of the metallographic specimen, resulting in the front of the metallographic specimen being unable to be in close contact with the front of the transparent mold box when the metallographic specimen is sealed inside the transparent mold box, so that the back of the metallographic specimen is in close contact with the back of the transparent mold box, and the front of the metallographic specimen is still facing the camera mechanism. At this time, the front of the metallographic specimen is away from the front of the transparent mold box, so that the object distance between the front of the metallographic specimen and the lens of the camera mechanism is H2. Due to the short depth of field, when the object distance changes from H1 to H2, the object distance increases. The image of the metallographic sample is not clear due to the loss of focus due to D1. Since the camera unit is out of focus, the focusing unit controls the camera unit to move along the optical axis until the camera unit can obtain a clear image of the metallographic sample. The focusing is completed. At this time, the focusing unit controls the camera unit to move along the optical axis by a distance of D2. The object distance between the camera unit and the metallographic sample is H3. Theoretically, when D2 is equal to D1 and H3 is equal to H1, the camera unit can obtain a clear image of the metallographic sample. The specific D2 value can be obtained through test calibration. In the feeding link, the feeding mechanism delivers the transparent mold box sealed with the metallographic sample to the preset grabbing position, so that the grabbing mechanism can grab the transparent mold box from the grabbing position and move it to the camera position, and then the camera mechanism obtains the image information of the metallographic sample. Specifically, the feeding mechanism includes a feeding device, a second driving device and a horizontally arranged substrate; the feeding device and the second driving device are installed on the substrate; the feeding device can feed the transparent mold box to the loading port; the second driving device is transmission-connected to the feeding device, and can drive the loading port to move to the grabbing position, so that the transparent mold box located at the loading port can be grabbed from the grabbing position.

[0063] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A metallographic specimen grinding machine, comprising a frame body and a camera mechanism, wherein the camera mechanism is disposed on the frame body; the metallographic specimen is sealed in a transparent mold box, and when the transparent mold box is in a camera position, the camera mechanism is used to capture image information of the metallographic specimen, characterized in that: The camera mechanism includes: A focusing unit is configured to move the camera unit along the direction of the optical axis to adjust the object distance between the camera unit and the metallographic specimen; the focusing unit comprises: a sliding plate, a guide rail plate, and a first driving device; the sliding plate is slidably connected to the guide rail plate; a side surface of the guide rail plate is provided with an elongated guide rail groove, the guide rail groove being arranged parallel to the direction of the optical axis; a side surface of the sliding plate is provided with a sliding bar corresponding to the guide rail groove, the sliding bar being slidably embedded in the guide rail groove; the first driving device is transmission-connected to the sliding plate, and is configured to drive the sliding plate to slide on the guide rail plate; The camera unit is used to capture image information of the metallographic sample, and the camera unit is connected to the sliding plate.

2. The metallographic sample grinding machine according to claim 1, characterized in that: The imaging mechanism also includes a controller, which is electrically connected to the imaging unit and obtains image information of the metallographic sample captured by the imaging unit; the controller is electrically connected to the first driving device and performs clarity judgment based on the image information to obtain a clarity result, and controls the operation of the first driving device based on the clarity result.

3. The metallographic sample grinding machine according to claim 1, characterized in that: The first driving device includes a first support seat, a driving motor, a screw rod and a nut; the driving motor is installed on the first support seat; the output shaft of the driving motor is transmission connected to the screw rod, and the nut is sleeved on the screw rod; the nut is transmission connected to the sliding plate.

4. The grinding machine for metallographic specimens according to claim 3, characterized in that: The camera unit is connected to the sliding plate via a second support base; The second support seat is provided with a channel adapted to the screw rod, and the screw rod passes through the channel; The nut is connected to the second support base and is transmission-connected to the sliding plate through the second support base.

5. The metallographic sample grinding machine according to claim 1, characterized in that: The first driving device includes a third support base and a first driving cylinder; the first driving cylinder is installed on the third support base; and the first piston rod of the first driving cylinder is transmission-connected to the sliding plate.

6. The metallographic sample grinding machine according to any one of claims 1 to 5, characterized in that: The imaging unit includes a lens and a camera; the lens obtains light information of the metallographic sample, and the camera obtains image information of the metallographic sample based on the light information; The camera mechanisms are symmetrically arranged in two groups.

7. The metallographic sample grinding machine according to claim 1, characterized in that: It also includes a feeding mechanism, which is arranged on the frame body; the feeding mechanism includes a feeding device, a second driving device and a horizontally arranged base plate; the feeding device and the second driving device are installed on the base plate; The feeding device includes a guide rail, a slider, a support stand and a long feeding trough extending toward a preset material grabbing position; The slider is slidably arranged on the guide rail; the support stand is arranged on the slider; the feeding trough is arranged on the support stand at an angle relative to the substrate; the bottom end of the feeding trough is connected to a horizontally arranged feeding port; The feeding trough is used to store the transparent mold box sealed with the metallographic sample and to deliver the transparent mold box to the loading port; The second driving device is in transmission connection with the feeding device to drive the loading port to move to the material grabbing position.

8. The metallographic sample grinding machine according to claim 7, characterized in that: The support stand is in the shape of a right-angled triangle, and the right-angled side of the support stand is arranged on the slider; the feed trough is arranged on the oblique side of the support stand; the feed trough is detachably connected to the support stand.

9. The metallographic sample grinding machine according to claim 7, characterized in that: The second driving device includes a second driving cylinder, and a second piston rod of the second driving cylinder is drivingly connected to the feeding device; The feeding devices are provided in two groups and are symmetrically distributed on both sides of the second driving cylinder.

10. The metallographic sample grinding machine according to claim 7, characterized in that: A counterweight pushing block is slidably arranged in the feeding trough, and the counterweight pushing block contacts the feeding trough through a rolling wheel.

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