Metal sample positioning components, feeding systems, metallographic testing machines

Abstract

The present invention discloses a positioning component, a feeding system and a metallographic testing machine for metal samples, including a tray, a fixing part and a set screw. The fixing part is a rectangular frame that is connected from top to bottom, and is used to place metal samples inside. A support foot is arranged at each of the four corners of the bottom, a side hole is provided on at least one side wall, and a corner hole is provided at the corner of at least one side wall, and the bottom surfaces of the four support feet are located on the same horizontal plane; a triangular groove and a circular groove are provided on the upper surface of the tray, and the bottom surfaces of the triangular groove and the circular groove are located on the same horizontal plane; the set screws are respectively inserted into the fixing part through the corner hole and the side hole, one of the four support feet is inserted into the circular groove, and the other three are located in the triangular groove, and the side walls of two of the support feet are against the side walls of the triangular groove adjacent to the circular groove. The advantages of the present invention are: fully automated loading and unloading and metallographic experiments of metal samples are realized by robots, and the metal samples are kept dry by a drying oven to avoid rusting in a normal humidity environment.

Description

Technical Field

[0001] The invention relates to a positioning component, a feeding system and a metallographic testing machine of a metal sample, and belongs to the technical field of physical experiments in the steel industry. Background Art

[0002] Metallography refers to the chemical composition of a metal or alloy and the physical and chemical states of the various components within the alloy. In the production process of existing steel companies, metallographic analysis of metal samples is an essential quality inspection link.

[0003] In the prior art, manual observation and determination of the metallographic structure of metal samples are mostly carried out. This determination method has low loading and unloading efficiency, is complicated to operate, and is prone to subjective errors. In addition, after the metal sample is prepared, the polished and smooth observation surface will slowly rust at room temperature and normal humidity, and it cannot be directly observed in about 4 hours. If there are many metal samples in a batch, it will directly affect the accuracy and efficiency of the subsequent observation experiment, and it also cannot meet the goal of achieving unmanned operation on site.

[0004] Therefore, how to quickly and accurately achieve fully automated metallographic analysis of metal samples while avoiding rusting has become an urgent problem that needs to be solved in the digital transformation of steel companies. Summary of the invention

[0005] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a metal sample positioning component, a feeding system and a metallographic testing machine, so as to achieve precise positioning of the metal sample and realize fully automatic, fast and accurate sample observation and judgment while preventing the metal sample from rusting.

[0006] Technical solution: A metal sample positioning assembly comprises a tray, a fixing part and a fixing screw, wherein the fixing part is a rectangular frame which is through-through from top to bottom and is used to place the metal sample inside, a supporting foot is arranged on each of the four corners of the bottom, a side hole is opened on at least one side wall, and a corner hole is opened at the corner of at least one side wall, and the bottom surfaces of the four supporting feet are located on the same horizontal plane; a triangular groove and a circular groove are opened on the upper surface of the tray, and the bottom surfaces of the triangular groove and the circular groove are located on the same horizontal plane; the fixing screw is inserted into the fixing part through the corner hole and the side hole respectively to fix the metal sample in the air in the fixing part, one of the four supporting feet is inserted into the circular groove, and the other three are located in the triangular groove, and the side walls of two of the supporting feet are against the side walls of the triangular groove adjacent to the circular groove to form a triangular positioning.

[0007] The principle of the present invention is: when positioning and installing the metal sample and the fixing part, first turn the fixing part upside down, then put the metal sample into the fixing part, screw the set screws into the corner holes and the side holes to fix them, and finally straighten the fixing part to complete the suspended installation of the metal sample. When positioning and installing the fixing part and the tray, directly fix the bottom four corners of the fixing part to the triangular groove and the circular groove on the tray, respectively, and use the positional relationship between the side wall of the triangular groove and the circular groove to complete the triangular positioning installation of the fixing part and the tray, so as to achieve accurate positioning of the metal sample by accurately positioning the matching fixing part and the tray.

[0008] Furthermore, there are a plurality of circular grooves, and the fixing parts have a plurality of sizes corresponding to the number of the circular grooves. The fixing parts of each size correspond to the position of each circular groove to form a triangular positioning.

[0009] Furthermore, the triangular groove is a right-angled isosceles triangular groove, the fixing piece is a square frame, and the center line of the plurality of circular grooves is located on the perpendicular bisector of the long hypotenuse of the triangular groove for easy positioning.

[0010] Furthermore, the triangular grooves and circular grooves are arranged in a matrix on the tray in groups to achieve batch fixation of metal samples.

[0011] The present invention also relates to a feeding system based on the above-mentioned positioning component, comprising a positioning component, a drying box, a robot, and a clamp, wherein the drying box comprises a box body, a drying core, an outer shell, a front door, a rear door, a door opening mechanism, an inner material rack, a first pallet positioning mechanism, an outer material table, and a second pallet positioning mechanism, wherein the outer shell seals and wraps the box body, the front door is arranged on the front wall of the outer shell, the rear door is fixed on the rear wall and can be opened and closed by the door opening mechanism, the drying core is fixed on the inner wall, and the outer material table is fixed on the outer wall, the outer material table is arranged correspondingly at the rear door, the inner material rack is fixed on the box body, the first pallet positioning mechanism is fixed on the inner material rack, and the second pallet positioning mechanism is fixed on the outer material table, all of which are used to guide and position the pallet, and the setting heights of the front door, the first pallet positioning mechanism, the second pallet positioning mechanism, and the rear door correspond; the robot is located on one side of the drying box, and the clamp is fixed on the movable end of the robot, and is used to extract the pallet from the first pallet positioning mechanism, pull it onto the second pallet positioning mechanism, and clamp the fixing part from the pallet.

[0012] In this structure, after the metal sample and the positioning assembly are installed and fixed, they are manually loaded onto the first tray positioning mechanism through the front door of the drying box, and the metal sample is kept dry by the drying core to prevent it from rusting. When taking the material, the rear door is automatically opened by the door opening mechanism, and the robot drives the gripper to reach the rear door, extracts the positioning assembly from the first tray positioning mechanism, and pulls it onto the second tray positioning mechanism, and then uses the gripper to clamp the fixings from the tray, and subsequently places it on the fully automatic microscope, completing the fully automatic loading of the metal sample.

[0013] Furthermore, the pallet is also provided with a positioning pin, and the clamp includes a connecting seat, an electric turntable, a horizontal slide rail, an electric slider, and a probe. The electric turntable vertically connects the robot and the connecting seat, and the horizontal slide rail is fixed on the side wall of the connecting seat. There are two electric sliders, which are respectively fixed on the left and right sides of the horizontal slide rail. One probe is fixed on each electric slider. The probe is a long rod structure, and the front end sinks downward and is provided with a positioning hole. The positioning hole is aligned with the positioning pin; the positioning hole is inserted into the positioning pin to pull the pallet out of the first pallet positioning mechanism and pull it onto the second pallet positioning mechanism. The probes on both sides are driven by the electric slider to move toward the middle to clamp the fixings. In this structure, the sinking structure at the front end of the probe can be used to more conveniently clamp a specified fixing on the pallet to prevent clamping of multiple fixings.

[0014] Furthermore, the door opening mechanism includes an electric cylinder, a floating joint, a side support plate, and a positioning slide rod. The fixed end and the movable end of the electric cylinder are respectively connected to the outer shell and the rear door through the floating joint. The side support plates are fixed on the outer shell and are located on the left and right sides of the rear door. A slide groove is provided on the side support plate. The positioning slide rod passes through the rear door and is inserted into the slide groove. The electric cylinder drives the rear door to move up and down along the slide groove to open or close the rear door.

[0015] Further, the slide groove includes an inclined section and a vertical section, the inclined section has an outward angle, and the vertical section is connected to the end of the inclined section. In this structure, when opening the rear door, the inclined section can be slightly pushed outward to facilitate smoother door opening.

[0016] Furthermore, the drying box also includes a lifting mechanism, and the inner material rack is fixed to the box body by the lifting mechanism. There are multiple first pallet positioning mechanisms, which are arranged in rows on the inner material rack. Driven by the lifting mechanism, each of the first pallet positioning mechanisms reaches a height corresponding to the second pallet positioning mechanism to facilitate large-scale experiments.

[0017] Preferably, the lifting mechanism includes a driving motor, a vertical slide rail, and a vertical slider. One side of the vertical slider is fixed to the inner material rack and the other side is fixed to the vertical slide rail. The vertical slide rail is fixed to the box body. The driving motor drives the vertical slider to move up and down along the vertical slide rail.

[0018] Furthermore, the drying box also includes a cleaning mechanism, which includes a fan fixed on the external material table and an in-place sensor, wherein the in-place sensor is arranged at the air outlet of the fan and is used to detect whether there is a metal sample at the air outlet of the fan. In this structure, after the clamping claw clamps the fixing part, it moves to the in-place sensor, and after the in-place sensor senses a signal, it controls the fan to start, thereby automatically cleaning the metal sample in the fixing part.

[0019] Furthermore, the first pallet positioning mechanism is composed of two relatively arranged guide grooves, which are respectively fixed on the left and right sides of the inner material rack, and the left and right sides of the pallet are respectively inserted into the guide grooves on both sides, and the pallet can move forward and backward along the guide grooves.

[0020] Furthermore, the second pallet positioning mechanism is composed of two relatively arranged guide assemblies, and the two guide assemblies are respectively located on the left and right sides of the upper surface of the external material table, and each of the guide assemblies includes a pad and an L-shaped baffle fixed on the external material table, and the L-shaped baffle is located on the side of the pad, and a guide groove with a concave cross-section is formed between the upper part of the L-shaped baffle and the top of the pad, and the left and right sides of the pallet are respectively inserted into the guide grooves of the guide assemblies on both sides and move back and forth along them.

[0021] Furthermore, a V-shaped groove is provided on the side wall of the tray, and positioning spring pins aligned with the V-shaped groove are provided in the guide groove and the L-shaped baffle, respectively forming a mechanical limiting structure of the tray in the guide groove and the guide groove.

[0022] Furthermore, a sliding ball is provided on the top of the pad block, and a clamping spring pin is provided on the upper part of the L-shaped baffle bar. The sliding ball and the clamping spring pin are arranged opposite to each other, and the compression directions of both are in the vertical direction. The upper and lower surfaces of the tray are limited by the clamping spring pin and the sliding ball respectively.

[0023] The present invention also relates to a fully automatic metallographic testing machine based on the above-mentioned feeding system, including a feeding system, a workbench, a fully automatic microscope, and a control center. The workbench is located on one side of the feeding system, and the fully automatic microscope is fixed on the workbench. The control center is respectively associated with the robot, the clamp, the lifting mechanism, the door opening mechanism, the cleaning mechanism, and the fully automatic microscope signal. In this structure, firstly, all metal samples are loaded into the drying oven by manual loading, and then the loading of the metal samples from the first tray positioning mechanism to the second tray positioning mechanism is completed by the feeding system, and then the fixing parts are clamped by the clamp, moved to the fan to clean the surface of the metal sample, and finally moved to the fully automatic microscope for mobile observation, thereby completing the fully automatic metallographic experiment. After the observation is completed, the clamp puts the fixture back to the tray and continues to clamp the next fixture on the tray, continues cleaning and observation, until the metallographic experiment of the entire tray of fixtures is completed, the tray is pushed back into the drying oven by the clamp, and the lifting mechanism is raised and lowered to make the next tray reach the position corresponding to the second tray positioning mechanism, and the robot drives the clamp to pull out the tray again, and the cycle is repeated to complete the metallographic experiment of all metal samples in the drying oven.

[0024] Beneficial effects: Compared with the prior art, the advantages of the present invention are: 1. The triangular positioning structure of the fixing part and the tray realizes the precise positioning of the metal sample, and is suitable for positioning metal samples of different diameters; 2. The robot realizes the fully automated loading and unloading and metallographic experiment of the metal sample, and the drying box is used to keep the metal sample dry to avoid rusting in a normal humidity environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the positioning assembly of the present invention;

[0026] Figure 2 for Figure 1 A top view of

[0027] Figure 3 for Figure 1 A magnified schematic diagram of the E position in the middle;

[0028] Figure 4 for Figure 1 A magnified schematic diagram of the F position in the middle;

[0029] Figure 5 for Figure 1 A magnified schematic diagram of the G position in the middle;

[0030] Figure 6 is a schematic diagram of the three-dimensional structure of the fixing member;

[0031] Figure 7 for Figure 6 Bottom view of

[0032] Figure 8 It is a structural diagram of the feeding system;

[0033] Fig. 9 Schematic diagram of the three-dimensional structure of the gripper;

[0034] Fig.10 Schematic diagram of the three-dimensional structure of the drying oven Figure 1 ;

[0035] Fig.11 Schematic diagram of the three-dimensional structure of the drying oven Figure 2 ;

[0036] Fig.12 It is a cross-sectional view of the interior of the shell of the drying box;

[0037] Fig.13 It is a schematic diagram of the three-dimensional structure of the inner material rack;

[0038] Fig.14 for Fig.13 A magnified schematic diagram of the M position in the middle;

[0039] Fig.15 It is a three-dimensional structural schematic diagram of the position of the external material table;

[0040] Fig.16 is a schematic diagram of the three-dimensional structure of the second tray positioning mechanism;

[0041] Fig.17 for Fig.16 A magnified schematic diagram of the N position in the middle;

[0042] Fig.18 It is a three-dimensional structural schematic diagram of the door opening mechanism;

[0043] Fig.19 This is a schematic diagram of the structure of the metallographic testing machine. DETAILED DESCRIPTION

[0044] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. These embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0045] This embodiment first relates to a positioning assembly for a metal sample, as shown in the attached Figures 1 to 3 As shown, it includes a tray 11, a fixing member 12, and a fixing screw 13.

[0046] The fixing member 12 is as shown in the attached Figure 6 As shown, it is a rectangular frame that is through from top to bottom, and is used to place metal samples inside. A support foot 12a is set at each of the four corners of the bottom, a side hole 12b is opened on at least one side wall, and a corner hole 12c is opened at the corner of at least one side wall. The bottom surfaces of the four support feet 12a are located on the same horizontal plane; the tray 11 is as shown in the attached Figure 1, 2 As shown, the upper surface is provided with a triangular groove 11a and a circular groove 11b, and the bottom surfaces of the triangular groove 11a and the circular groove 11b are located on the same horizontal plane; the set screw 13 is as shown in the attached Figure 3 As shown, the fixing member 12 is inserted through the corner hole 12c and the side hole 12b respectively, and the metal sample is suspended and fixed in the fixing member 12, one of the four supporting legs 12a is inserted into the circular groove 11b, and the other three are located in the triangular groove 11a, and the side walls of two of the supporting legs 12a are against the side walls of the triangular groove 11a adjacent to the circular groove 11b, forming a triangular positioning.

[0047] In this embodiment, in order to achieve the fixation of metal samples of different sizes, the circular grooves 11b are set to be multiple, and the fixing parts 12 have multiple sizes corresponding to the number of circular grooves 11b. The fixing parts 12 of each size correspond to the position of each circular groove 11b to form a triangular positioning. At the same time, in order to facilitate the positioning and arrangement of the metal sample, the triangular groove 11a adopts a right-angled isosceles triangular groove, and the fixing part 12 adopts a square frame. The center line of the multiple circular grooves 11b is located on the mid-perpendicular line of the long hypotenuse of the triangular groove 11a. In addition, in order to achieve the simultaneous fixation of small batches of samples, the triangular grooves 11a and the circular grooves 11b are arranged in a matrix on the tray 11.

[0048] Specifically, this embodiment includes four sizes of fixing members, and correspondingly, there are four circular grooves. When it is necessary to fix an oversized metal sample, such as the attached Figure 2 As shown in the fixing piece at position A in the figure, the fixing piece with the largest specification is used. One of the supporting legs of the fixing piece is inserted into the outermost circular groove, and the other three supporting legs are respectively inserted into the three vertices of the triangular groove to form a fixing structure. When a smaller metal specimen needs to be fixed, the fixing piece with the largest specification is used as shown in the attached figure. Figure 2 As shown in the fixing parts at positions B to D, one of the supporting feet is inserted into the corresponding inner circular groove, the other two supporting feet are inserted into the triangular grooves close to the side walls, and the last supporting foot is placed in the triangular groove to form a fixed structure.

[0049] The "triangular positioning" in this embodiment refers to a three-point fixing structure formed by a support foot aligned with the circular groove and two support feet aligned with the side walls of the triangular groove. Figure 7 For example, the supporting foot H adopts a round foot, which matches the circular groove 11b to form a first positioning point. The supporting foot K and the supporting foot J are chamfered on the side close to the supporting foot H. The two chamfers are located on the same plane L, and the plane L overlaps with the hypotenuse of the triangular groove 11a. When the supporting foot H matches the circular groove 11b, the chamfers of the supporting foot K and the supporting foot J fit tightly on the hypotenuse of the triangular groove 11a, forming a second positioning point and a third positioning point, thereby forming a three-point fixed structure.

[0050] This embodiment also relates to a feeding system based on the above-mentioned metal sample positioning assembly, as shown in the attached Figure 8 As shown, it includes a positioning component 1, a drying box 2, a robot 3, and a clamp 4.

[0051] The robot 3 is located at one side of the drying box 2 , and the clamping claw 4 is fixed on the movable end of the robot 3 .

[0052] Gripper 4 as attached Fig. 9 As shown, it specifically includes a connecting seat 41, an electric turntable 42, a horizontal slide rail 43, an electric slider 44, and a probe 45. The electric turntable 42 vertically connects the robot 3 and the connecting seat 41, the horizontal slide rail 43 is fixed on the side wall of the connecting seat 41, there are two electric sliders 44, which are respectively fixed on the left and right sides of the horizontal slide rail 43, and a probe 45 is fixed on each electric slider 44. The probe 45 is a long rod structure, the front end of which sinks downward and is provided with a positioning hole 45a.

[0053] Drying box 2 as attached Figures 10 to 18 As shown, it specifically includes a box body 2a, a drying machine core 2b, a shell 2c, a front door 2d, a rear door 2e, a door opening mechanism 2f, an inner material rack 2g, a first pallet positioning mechanism 2h, an outer material platform 2i, a second pallet positioning mechanism 2j, a lifting mechanism 2k, and a cleaning mechanism 2m. The shell 2c seals and wraps the box body 2a, a front door 2d is arranged on the front wall of the shell 2c, a fixed rear door 2e that can be opened and closed by a door opening mechanism 2f is arranged on the rear wall, a drying machine core 2b is fixed on the inner wall, and an outer material platform 2i is fixed on the outer wall, and the outer material platform 2i is correspondingly arranged at the rear door 2e, the inner material rack 2g is fixed to the box body 2a by a lifting mechanism 2k, the first pallet positioning mechanism 2h is fixed on the inner material rack 2g, and the second pallet positioning mechanism 2j is fixed on the outer material platform 2i, all of which are used to guide and position the pallet 11, and the front door 2d, the first pallet positioning mechanism 2h, the second pallet positioning mechanism 2j, and the rear door 2e are arranged at corresponding heights.

[0054] To realize the automatic opening and closing of the rear door, the door opening mechanism 2f is as shown in the attached Fig.18As shown, it includes an electric cylinder 2f1, a floating joint 2f2, a side support plate 2f3, and a positioning slide bar 2f4. The fixed end and the movable end of the electric cylinder 2f1 are connected to the housing 2c and the rear door 2e respectively through the floating joint 2f2. The side support plate 2f3 is fixed on the housing 2c and is located on the left and right sides of the rear door 2e. A slide groove a is provided on the side support plate 2f3. The positioning slide bar 2f4 passes through the rear door 2e and is inserted into the slide groove a. The electric cylinder 2f1 drives the rear door 2e to move up and down along the slide groove a to open or close the rear door 2e. The slide groove a includes an inclined section a-1 and a vertical section a-2. The inclined section a-1 has an outward angle, and the vertical section a-2 is connected to the end of the inclined section a-1. In this embodiment, the slide groove a is provided with two sections, which are respectively located at the upper and lower parts of the side support plate 2f3. Two positioning slide bars 2f4 are provided, which respectively pass through the upper and lower parts of the rear door 2e and are respectively inserted into the slide grooves a at the upper and lower parts of the side support plate 2f3. The lower part of the slide groove a is the inclined section a-1, and the upper part is the vertical section a-2. The electric cylinder 2f1 contracts to drive the rear door 2e to move upward to form an open structure, and the electric cylinder 2f1 extends to drive the rear door 2e to move downward to form a closed structure. When the rear door 2e is opened, the positioning slide bar 2f4 slides from the inclined section a-1 to the vertical section a-2 to first slightly push the rear door outward and then lift it upward, so that the opening process is smoother.

[0055] In order to realize the automatic positioning of multiple trays in sequence to adapt to the automatic metallographic experiment of large quantities of metal samples, the lifting mechanism 2k is as shown in the attached Fig.12 As shown, it includes a driving motor 2k1, a vertical slide rail 2k2, and a vertical slider 2k3. One side of the vertical slider 2k3 is fixed to the inner material rack 2g, and the other side is fixed to the vertical slide rail 2k2. The vertical slide rail 2k2 is fixed to the box body 2a. The driving motor 2k1 drives the vertical slider 2k3 to move up and down along the vertical slide rail 2k2. At the same time, there are multiple first pallet positioning mechanisms 2h, which are arranged in a row on the inner material rack 2g. Each first pallet positioning mechanism 2h, driven by the lifting mechanism 2k, reaches the height corresponding to the second pallet positioning mechanism 2j. In this embodiment, as shown in the attached figure, Fig.13 As shown in FIG. 1 , the first tray positioning mechanism 2h is composed of two oppositely arranged guide grooves 2h1, which are respectively fixed on the left and right sides of the inner material rack 2g, and the left and right sides of the tray 11 are respectively inserted into the guide grooves 2h1 on both sides, and the tray 11 can move forward and backward along the guide grooves 2h1. Figures 15 to 17As shown, it consists of two relatively arranged guide assemblies, which are respectively located on the left and right sides of the upper surface of the external material table 2i, and each guide assembly includes a pad 2j1 and an L-shaped baffle 2j2 fixed on the external material table 2i. The L-shaped baffle 2j2 is located on the side of the pad 2j1, and a guide groove b with a concave cross-section is formed between the upper part of the L-shaped baffle 2j2 and the top of the pad 2j1. The left and right sides of the tray 11 are respectively inserted into the guide grooves b of the guide assemblies on both sides and move back and forth along them.

[0056] In order to realize the automatic surface cleaning of metal samples before metallographic experiments, a cleaning mechanism is set up. The cleaning mechanism 2m is as shown in the attached Fig.15 As shown, it includes a fan 2m1 fixed on the external material table 2i and an in-place sensor 2m2. The in-place sensor 2m2 is arranged at the air outlet of the fan 2m1 to detect whether there is a metal sample at the air outlet of the fan 2m1.

[0057] To achieve accurate positioning and matching of the pallet and the robot, the pallet 11 is as shown in the attached Figures 3 to 5 As shown, a positioning pin 11c, a V-shaped groove 11d, and a positioning iron sheet 11e are also provided, and the positioning hole 45a of the probe 45 is aligned with the positioning pin 11c. Fig.14 , 17 As shown, the guide groove 2h1 and the L-shaped stopper 2j2 are both provided with positioning spring pins 2n aligned with the V-shaped groove 11d, forming a mechanical limit structure for the tray 11 in the guide groove 2h1 and the guide groove b respectively. At the same time, the guide groove 2h1 and the L-shaped stopper 2j2 are both provided with proximity switches 2p aligned with the positioning iron sheet 11e, which are used to accurately determine the position of the tray in the first tray positioning mechanism and the second tray positioning mechanism. In addition, as shown in the attached Fig.17 As shown, a sliding ball 2j3 is provided on the top of the pad 2j1, and a clamping spring pin 2j4 is provided on the upper part of the L-shaped baffle 2j2. The sliding ball 2j3 and the clamping spring pin 2j4 are arranged opposite to each other, and the compression directions of both are in the vertical direction. The upper and lower surfaces of the tray 11 are limited by the clamping spring pin 2j4 and the sliding ball 2j3 respectively.

[0058] The present invention also relates to a metallographic testing machine based on the above metal sample feeding system, as shown in the attached Fig.19 As shown, it includes a feeding system 100, a workbench 101, a fully automatic microscope 102, and a control center 103. The workbench 101 is located on one side of the feeding system 100, and the fully automatic microscope 102 is fixed on the workbench 101. The control center 103 is respectively associated with the robot 3, the gripper 4, the lifting mechanism 2k, the door opening mechanism 2f, the cleaning mechanism 2m, and the fully automatic microscope 102 signals.

[0059] Before using the metallographic testing machine of this embodiment, the metal sample and the positioning assembly are manually fixed and installed: that is, first, the metal sample and the fixing part are positioned and installed: 1. Turn the fixing part upside down; 2. Put the metal sample into the fixing part, and screw in the set screws from the corner hole and the side hole to fix it; 3. Straighten the fixing part to complete the suspended installation of the metal sample. Secondly, the fixing part and the tray are positioned and installed: the four bottom corners of the fixing part are fixed to the triangular groove and the circular groove on the tray respectively, and the positional relationship between the side wall of the triangular groove and the circular groove is used to complete the triangular positioning installation of the fixing part and the tray, so as to achieve accurate positioning of the metal sample by accurately positioning the matching fixing part and the tray. Finally, repeat the above steps to complete the fixation of all metal samples and the positioning assembly, and manually load each positioning assembly to the inner material rack through the front door of the drying box, and position it through the guide groove to complete the preparation work.

[0060] When the metallographic testing machine is used, the control center 103 first controls the electric cylinder 2f1 to drive the rear door 2e to move upward along the slide a to open the rear door 2e, and then controls the robot 3 to drive the clamp 4 to approach the tray 11, and uses the positioning hole 45a of the probe 45 to clamp the positioning pin 11c of the tray 11, and pull the tray 11 out of the guide groove 2h1 and pull it to the guide groove b to complete the placement of the tray 11. After that, the robot 3 is controlled to drive the clamp 4 to approach the fixed part 12, and the electric sliders 44 on both sides are controlled to drive the probe 45 to move toward the middle, clamp the fixed part 12, and move it to the in-place sensor 2m2. According to the in-place signal of the in-place sensor 2m2, the fan 2m1 is controlled to open to complete the surface cleaning of the metal sample. After that, it is moved to the fully automatic microscope for mobile observation, thereby completing the fully automatic metallographic experiment process of a single metal sample.

[0061] Repeat the above process to complete the fully automatic metallographic experiment of all metal samples on a single tray.

[0062] After completing the fully automatic metallographic experiment of all metal samples on a single tray, the tray is pushed back into the drying oven by the clamp, and the control center 103 controls the lifting mechanism to descend so that the next tray reaches the position corresponding to the second tray positioning mechanism, and the robot drives the clamp to pull out the tray again, and the above process is repeated to complete the metallographic experiment of all metal samples on all trays in the drying oven.

[0063] This embodiment realizes the precise positioning of the metal sample through the triangular positioning structure of the fixing piece and the tray, and is applicable to the positioning of metal samples of different diameters. At the same time, the robot realizes the fully automated loading and unloading and metallographic experiment of the metal sample, and the drying box keeps the metal sample dry to prevent it from rusting in a normal humidity environment.

Claims

1. A metal sample positioning assembly, characterized in that: The invention comprises a tray (11), a fixing member (12), and a set screw (13); the fixing member (12) is a rectangular frame that is connected from top to bottom, and is used to place metal samples inside; a supporting foot (12a) is arranged at each of the four corners of the bottom; at least one side wall is provided with a side hole (12b); at least one side wall is provided with a corner hole (12c); the bottom surfaces of the four supporting feet (12a) are located on the same horizontal plane; the upper surface of the tray (11) is provided with a triangular groove (11a) and a circular groove (11b); the triangular groove (11a) and the circular groove (11b) are provided with a plurality of holes (12c) on the bottom surface; The bottom surfaces of the fixing member (11b) are located on the same horizontal plane; the fixing screws (13) are respectively inserted into the fixing member (12) through the corner holes (12c) and the side holes (12b), so as to suspend and fix the metal sample in the fixing member (12); one of the four supporting legs (12a) is inserted into the circular groove (11b), and the other three are located in the triangular groove (11a); and the side walls of two of the supporting legs (12a) are against the side walls of the triangular groove (11a) adjacent to the circular groove (11b), so as to form a triangular positioning.

2. The positioning assembly according to claim 1, characterized in that: There are a plurality of circular grooves (11b), corresponding to the number of the circular grooves (11b); the fixing member (12) has a plurality of sizes and specifications, and each size and specification of the fixing member (12) corresponds to the position of each circular groove (11b) to form a triangular positioning.

3. The positioning assembly according to claim 1, characterized in that: The triangular groove (11a) is a right-angled isosceles triangular groove, the fixing member (12) is a square frame, and the center line of the plurality of circular grooves (11b) is located on the perpendicular midline of the long hypotenuse of the triangular groove (11a).

4. The positioning assembly according to claim 1, characterized in that: The triangular grooves (11a) and the circular grooves (11b) are arranged in a matrix on the tray (11) in a plurality of groups.

5. A metal sample feeding system, characterized in that: The invention comprises a positioning assembly (1) as claimed in any one of claims 1 to 4, and a drying box (2), a robot (3), and a gripper (4), wherein the drying box (2) comprises a box body (2a), a drying core (2b), an outer shell (2c), a front door (2d), a rear door (2e), a door opening mechanism (2f), an inner material rack (2g), a first tray positioning mechanism (2h), an outer material table (2i), and a second tray positioning mechanism (2j), wherein the outer shell (2c) seals and wraps the box body (2a), the front door (2d) is arranged on the front wall of the outer shell (2c), the rear door (2e) is fixed on the rear wall and can be opened and closed by the door opening mechanism (2f), the drying core (2b) is fixed on the inner wall, and the outer material table (2i) is fixed on the outer wall, and the outer material table (2i) is arranged corresponding to the rear door (2d). 2e), the inner material rack (2g) is fixed on the box body (2a), the first pallet positioning mechanism (2h) is fixed on the inner material rack (2g), and the second pallet positioning mechanism (2j) is fixed on the outer material platform (2i), all of which are used to guide and position the pallet (11), and the front door (2d), the first pallet positioning mechanism (2h), the second pallet positioning mechanism (2j), and the rear door (2e) are arranged at corresponding heights; the robot (3) is located on one side of the drying box (2), and the clamp (4) is fixed on the movable end of the robot (3), and is used to extract the pallet (11) from the first pallet positioning mechanism (2h), pull it to the second pallet positioning mechanism (2j), and clamp the fixing part (12) from the pallet (11).

6. The feeding system according to claim 5, characterized in that: The tray (11) is also provided with a positioning pin (11c). The clamp (4) comprises a connecting seat (41), an electric turntable (42), a horizontal slide rail (43), an electric slider (44), and a probe (45). The electric turntable (42) vertically connects the robot (3) and the connecting seat (41). The horizontal slide rail (43) is fixed on the side wall of the connecting seat (41). There are two electric sliders (44), which are respectively fixed on the left and right sides of the horizontal slide rail (43). Each of the electric sliders (44) is respectively fixed with a The probe (45) is a long rod structure, the front end of which sinks downward and is provided with a positioning hole (45a), and the positioning hole (45a) is aligned with the positioning pin (11c); the positioning hole (45a) is inserted into the positioning pin (11c) to pull the tray (11) out of the first tray positioning mechanism (2h) and pull it onto the second tray positioning mechanism (2j), and the probes (45) on both sides are driven by the electric slider (44) to move toward the middle to clamp the fixing member (12).

7. The feeding system according to claim 5, characterized in that: The door opening mechanism (2f) comprises an electric cylinder (2f1), a floating joint (2f2), a side support plate (2f3), and a positioning slide rod (2f4); the fixed end and the movable end of the electric cylinder (2f1) are respectively connected to the housing (2c) and the rear door (2e) through the floating joint (2f2); the side support plate (2f3) is fixed on the housing (2c) and is located on the left and right sides of the rear door (2e); a slide groove (a) is provided on the side support plate (2f3); the positioning slide rod (2f4) passes through the rear door (2e) and is inserted into the slide groove (a); the electric cylinder (2f1) drives the rear door (2e) to move up and down along the slide groove (a) to open or close the rear door (2e).

8. The feeding system according to claim 7, characterized in that: The slide groove (a) includes an inclined section (a-1) and a vertical section (a-2), wherein the inclined section (a-1) has an outward angle, and the vertical section (a-2) is connected to the end of the inclined section (a-1).

9. The feeding system according to claim 5, characterized in that: The drying box (2) further comprises a lifting mechanism (2k), the inner material rack (2g) is fixed to the box body (2a) via the lifting mechanism (2k), there are a plurality of first pallet positioning mechanisms (2h), which are arranged in a row on the inner material rack (2g), and each of the first pallet positioning mechanisms (2h) is driven by the lifting mechanism (2k) to reach a height corresponding to the second pallet positioning mechanism (2j).

10. The feeding system according to claim 9, characterized in that: The lifting mechanism (2k) comprises a driving motor (2k1), a vertical slide rail (2k2), and a vertical slider (2k3); one side of the vertical slider (2k3) is fixed to the inner material rack (2g), and the other side is fixed to the vertical slide rail (2k2); the vertical slide rail (2k2) is fixed to the box body (2a); and the driving motor (2k1) drives the vertical slider (2k3) to move up and down along the vertical slide rail (2k2).

11. The feeding system according to claim 5, characterized in that: The drying box (2) also includes a cleaning mechanism (2m), the cleaning mechanism (2m) including a fan (2m1) fixed on the external material table (2i) and an in-place sensor (2m2), the in-place sensor (2m2) being arranged at the air outlet of the fan (2m1) and being used to detect whether there is a metal sample at the air outlet of the fan (2m1).

12. The feeding system according to claim 5, characterized in that: The first tray positioning mechanism (2h) is composed of two oppositely arranged guide grooves (2h1), the two guide grooves (2h1) are respectively fixed on the left and right sides of the inner material rack (2g), the left and right sides of the tray (11) are respectively inserted into the guide grooves (2h1) on both sides, and the tray (11) can move forward and backward along the guide grooves (2h1).

13. The feeding system according to claim 12, characterized in that: The second pallet positioning mechanism (2j) is composed of two relatively arranged guide assemblies, and the two guide assemblies are respectively located on the left and right sides of the upper surface of the external material platform (2i), and each of the guide assemblies includes a pad (2j1) and an L-shaped baffle (2j2) fixed on the external material platform (2i), and the L-shaped baffle (2j2) is located on the side of the pad (2j1), and a guide groove (b) with a concave cross-section is formed between the upper part of the L-shaped baffle (2j2) and the top of the pad (2j1), and the left and right sides of the pallet (11) are respectively inserted into the guide grooves (b) of the guide assemblies on both sides and move forward and backward along them.

14. The feeding system according to claim 13, characterized in that: A V-shaped groove (11d) is provided on the side wall of the tray (11), and positioning spring pins (2n) aligned with the V-shaped groove (11d) are provided in the guide groove (2h1) and the L-shaped stopper (2j2), respectively forming a mechanical limiting structure of the tray (11) in the guide groove (2h1) and the guide groove (b).

15. The feeding system according to claim 13, characterized in that: A sliding bead (2j3) is arranged on the top of the cushion block (2j1), a clamping spring pin (2j4) is arranged on the upper part of the L-shaped baffle (2j2), the sliding bead (2j3) and the clamping spring pin (2j4) are arranged opposite to each other, and the compression directions of both are in the vertical direction, and the upper and lower surfaces of the tray (11) are respectively limited by the clamping spring pin (2j4) and the sliding bead (2j3).

16. A metallographic testing machine for metal samples, characterized in that: It comprises a feeding system (100) as described in any one of claims 5 to 15, and a workbench (101), a fully automatic microscope (102), and a control center (103), wherein the workbench (101) is located on one side of the feeding system (100), the fully automatic microscope (102) is fixed on the workbench (101), and the control center (103) is respectively associated with the robot (3), the gripper (4), the lifting mechanism (2k), the door opening mechanism (2f), the cleaning mechanism (2m), and the fully automatic microscope (102) by signal.

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