Graphite product grinding clamp

Abstract

The invention relates to the technical field of grinding clamps, and discloses a graphite product grinding clamp which comprises a base table used for bearing a graphite product, a plurality of through holes are formed in the base table in a penetrating mode, a plurality of columns are arranged in the through holes, and the columns can support the graphite product. When the marking core moves close to the lower surface of the graphite product, the marking core can mark marking points on the lower surface of the graphite product, and different numbers of marking points can be marked on the lower surface of the graphite product according to the gap size; the warping position of the lower surface of the graphite product can be positioned, the warping size can be determined, when the graphite product is turned over and ground, an operator can rapidly adjust the feeding amount of a grinding wheel according to the warping height, the time for adjusting the feeding amount of the grinding wheel is shortened, and the grinding machining speed of the graphite product is increased.

Description

Technical Field

[0001] The invention relates to the technical field of grinding fixtures, in particular to a graphite product grinding fixture. Background Art

[0002] Graphite, a material with excellent electrical conductivity, high-temperature resistance, and strong chemical stability, is widely used in industries such as aerospace, electronics, metallurgy, and machinery. However, graphite's low hardness, brittleness, and dust generation make it a challenging material to process, particularly during grinding. To ensure grinding accuracy and surface quality, graphite products typically require specialized grinding fixtures.

[0003] When grinding the upper and lower surfaces of an existing graphite disk, the operator places the graphite disk on the upper surface of a fixture worktable and then fixes the position of the graphite disk with a clamp. Since the graphite disk itself will be subject to stress deformation, its upper and lower surfaces will be warped. When placed on the plane of the fixture worktable during grinding, there will be a gap between the lower surface of the graphite disk and the plane of the fixture worktable. If the fixture does not have a device to mark the position of the warped lower surface of the graphite disk, the operator will not be able to quickly adjust the grinding wheel feed according to the height of the warped graphite disk surface when the graphite disk is subsequently turned over for grinding, which greatly increases the grinding time of the graphite disk. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a graphite product grinding fixture.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A graphite product grinding fixture, comprising: A base is used to support the graphite product, and a plurality of through holes are formed in the base; A plurality of columns are disposed inside the through hole, the plurality of columns can support the graphite product, and a plurality of first holes are formed inside each of the plurality of columns; a plurality of marking cores disposed within the first hole, the plurality of marking cores being configured to mark the lower surface of the graphite product with a different number of marking points according to the spacing of the gaps when a gap exists between the lower surface of the graphite product and the contact surface of the upper surface of the base; The second driving unit is arranged inside the through hole, and the marking core is coupled with the second driving unit. The second driving unit is configured to drive the marking core to move along the central axis of the cylinder when it is squeezed by the cylinder, so that the marking core can mark the marking point on the lower surface of the graphite product.

[0006] As a further solution of the present invention, a partition is fixedly installed on the inner wall of the through hole, a circular groove is penetrated through the outer surface of the partition, the cylinder is arranged inside the circular groove and slidably installed on the inner wall of the circular groove, a limiting groove is provided on the inner wall of the circular groove, and a protrusion is provided on the circumferential outer surface of the cylinder, and the protrusion is slidably installed with the inner wall of the limiting groove.

[0007] As a further solution of the present invention, a rod is fixedly mounted on the bottom end of the column, a plurality of first grooves are opened inside the base, and a limiting unit for fixing the position of the column is provided inside the first groove, and the limiting unit includes: a slide bar disposed inside the first groove and slidably mounted on an inner wall of the first groove; a stopper, which is arranged inside the through hole and fixedly connected to the inner wall of the through hole, and the rod body is arranged between the sliding rod and the stopper; The second guide column is fixedly mounted on the upper surface of the sliding rod away from the end of the rod body. The second guide column is configured to drive the sliding rod to move along the central axis of the first groove when it is moved by force, thereby pressing the rod body between the sliding rod and the stop block, thereby fixing the position of the column.

[0008] As a further solution of the present invention, the base is provided with a first driving unit that drives the second guide column to move, and the first driving unit includes: A turntable is rotatably mounted on the outer circumferential surface of the base, a plurality of guide grooves are equidistantly formed on the upper surface of the turntable in the circumferential direction, and the second guide posts are slidably mounted on the inner walls of the guide grooves; A pneumatic telescopic rod, one end of which is fixedly connected to the circumferential outer surface of the base, and the telescopic end of which is rotatably connected to the upper surface of the turntable.

[0009] As a further solution of the present invention, the circumferential outer surfaces of the several cylinders are provided with multiple openings, the bottom end of the marking core passes through the top wall of the opening and is fixedly installed with a baffle, the lower surface of the baffle is fixedly connected with a tension spring, and the bottom end of the tension spring is fixedly connected to the bottom wall of the opening.

[0010] As a further solution of the present invention, the second driving unit includes: a cylinder, which is disposed inside the through hole and fixedly connected to the inner wall of the through hole; A piston is disposed inside the cylinder and is slidably mounted on the inner wall of the cylinder. The piston is fixedly connected to the bottom end of the cylinder; An arc-shaped compression cylinder is fixedly mounted on the upper surface of the piston and is connected to the interior of the cylinder through a conduit; An arc-shaped telescopic rod is slidably mounted between the inner walls of the arc-shaped compression cylinder; A rotating sleeve is sleeved on the outer surface of the column and is rotatably connected to the column. The telescopic end of the arc-shaped telescopic rod is fixedly connected to the circumferential outer surface of the rotating sleeve. The inner wall of the rotating sleeve is provided with an annular groove. A top block is disposed inside the annular groove and fixedly connected to the inner wall of the annular groove. The top block has two bevels formed near one end of the column, and the two bevels abut against the baffle. The first spring is arranged inside the cylinder, one end of the first spring abuts against the lower surface of the piston, and the other end of the first spring abuts against the bottom wall of the cylinder.

[0011] As a further solution of the present invention, the arc-shaped compression cylinder and the piston are arranged at the same center, the column, the cylinder and the rotating sleeve are arranged at the same center, and the bottom end of the rod body passes through the bottom end of the cylinder body.

[0012] As a further solution of the present invention, a plurality of second grooves are equidistantly provided on the circumferential outer surface of the base, and a clamp is slidably installed on the inner walls of the plurality of second grooves. A connecting plate is fixedly installed on the outer surface of the clamp away from the center of the base, and a first guide column is fixedly installed on the lower surface of the connecting plate. The first guide column is slidably installed on the inner wall of the guide groove, and an installation groove is provided through the outer surface of the clamp.

[0013] As a further solution of the present invention, an adjusting unit for adjusting the position of the graphite product is provided inside the mounting groove, and the adjusting unit includes: A column is disposed in the second groove and fixedly connected to the bottom of the second groove, and a groove is formed on the outer surface of the column near the clamping plate; A wave plate is fixedly mounted on the bottom of the groove, and a plurality of pits are evenly arranged on the surface of the wave plate; A rotating block is rotatably mounted between the inner walls of the mounting groove, one end of the rotating block is disposed inside the second groove, and a sliding groove is provided on the upper surface of the rotating block; Guide wheels are rotatably mounted on the outer surfaces of the rotating block on opposite sides, and the guide wheels abut against the outer surface of the column on the side close to the splint; A slider is slidably mounted between the inner walls of the slide groove, wherein the lower surface of the graphite product abuts against the upper surface of the slider; A push rod is fixedly mounted on one end of the slider close to the column, and one end of the push rod abuts against the pit on the surface of the corrugated plate; a second spring disposed inside the chute, one end of the second spring being fixedly connected to the outer surface of the slider, and the other end of the second spring being fixedly connected to the inner wall of the chute away from the column; The third spring is arranged in the second groove, one end of the third spring is fixedly connected to the lower surface of the rotating block, and the other end of the third spring is fixedly connected to the outer surface of the clamping plate.

[0014] As a further solution of the present invention, the rotating block is provided with an inclination angle relative to the clamping plate.

[0015] When the marking core of the present application moves close to the lower surface of the graphite product, the marking core can mark the lower surface of the graphite product with marking points, and can mark the lower surface of the graphite product with different numbers of marking points according to the size of the gap spacing, so as to clarify the degree and position of the warping of the lower surface of the graphite product. When grinding the graphite product through this device, the warping position of the lower surface of the graphite product can be located and the size of the warping can be determined. When the graphite product is turned over for grinding, the operator can quickly adjust the feed amount of the grinding wheel according to the height of the warping, thereby reducing the time for adjusting the feed amount of the grinding wheel and improving the grinding speed of the graphite product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a graphite product grinding fixture proposed by the present invention; Figure 2 This is a bottom view of the structure of a graphite product grinding fixture proposed by the present invention; Figure 3 This is a schematic diagram of the top view of a graphite product grinding fixture proposed by the present invention; Figure 4 This is a schematic cross-sectional view of a graphite product grinding fixture proposed by the present invention; Figure 5 A partial cross-sectional schematic diagram of a graphite product grinding fixture proposed by the present invention; Figure 6 This is a schematic diagram of a limiting unit of a graphite product grinding fixture proposed by the present invention; Figure 7 A schematic diagram of a column of a graphite product grinding fixture proposed by the present invention; Figure 8 This is a schematic cross-sectional view of a column of a graphite product grinding fixture proposed by the present invention; Figure 9 A schematic diagram of a piston of a graphite product grinding fixture proposed in the present invention; Figure 10 This is a schematic diagram of a marking core of a graphite product grinding fixture proposed by the present invention; Figure 11 for Figure 5 A partial enlarged schematic diagram of point B in the middle; Figure 12 This is a schematic diagram of an adjustment unit of a graphite product grinding fixture proposed by the present invention; Figure 13 A schematic diagram of a rotating block of a graphite product grinding fixture proposed by the present invention; Figure 14This is a schematic diagram of a push rod of a graphite product grinding fixture proposed by the present invention; Figure 15 for Figure 3 A partial enlarged schematic diagram of point A in the middle.

[0017] In the picture: 100, base; 110, through hole; 111, partition; 120, first groove; 130, second groove; 200. Graphite products; 300, first drive unit; 310, turntable; 311, guide groove; 320, pneumatic telescopic rod; 400, column; 410, first hole; 420, protrusion; 430, opening; 440, rod; 500, marking core; 510, baffle; 520, tension spring; 600, clamping plate; 610, first guide post; 620, mounting slot; 700, second drive unit; 710, arc-shaped compression cylinder; 720, arc-shaped telescopic rod; 730, guide tube; 740, rotating sleeve; 741, annular groove; 750, top block; 751, bevel; 760, piston; 770, cylinder; 780, first spring; 800, limit unit; 810, slide bar; 820, stopper; 830, second guide post; 900, adjustment unit; 910, column; 920, rotating block; 921, slide; 930, guide wheel; 940, slider; 950, push rod; 960, second spring; 970, wave plate; 980, third spring. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In order to mark the gap between the lower surface of the graphite plate and the upper surface of the fixture workbench due to warping after the graphite plate is placed on the fixture workbench, such as Figure 1-Figure 3As shown, the embodiment of the present application discloses a graphite product grinding fixture, which includes a base 100, a plurality of cylinders 400, a plurality of marking cores 500, and a second drive unit 700. During use, the operator places the base 100 on the workbench of a surface grinder and fixes it in position. Then, the operator places the graphite product 200 on the upper surface of the base 100. After the position of the graphite product 200 is fixed, the upper surface of the graphite product 200 is ground by the grinding wheel on the surface grinder. When there is a gap between the contact surface of the lower surface of the graphite product 200 and the upper surface of the base 100, a plurality of through holes 110 are formed through the interior of the base 100, and a plurality of columns 400 are arranged inside the through holes 110. The top ends of the columns 400 are against the lower surface of the graphite product 200, so that the plurality of columns 400 can support the graphite product 200, so that the graphite product 200 will not vibrate due to these gaps during grinding, thereby ensuring the stability of the grinding process of the graphite product 200. Figure 4 As shown, in order to mark the position and gap size of the gap between the graphite product 200 and the base 100, a plurality of first holes 410 are opened inside the plurality of columns 400, a plurality of marking cores 500 are arranged inside the first holes 410, a second driving unit 700 is arranged inside the through hole 110, the marking core 500 and the second driving unit 700 are coupled, and the second driving unit 700 is configured to drive the marking core 500 to move along the central axis of the column 400 when it is squeezed by the column 400 (the specific driving method is detailed below). When the marking core 500 moves close to the lower surface of the graphite product 200, the marking core 500 can mark the lower surface of the graphite product 200 with marking points, and can mark the lower surface of the graphite product 200 with different numbers of marking points according to the size of the gap spacing, so as to clarify the warping degree and position of the lower surface of the graphite product 200. When grinding the graphite product 200 through this device, the warping position of the lower surface of the graphite product 200 can be located and the size of the warping can be determined. When the graphite product 200 is turned over for grinding, the operator can quickly adjust the feed amount of the grinding wheel according to the height of the warping, which reduces the time for adjusting the feed amount of the grinding wheel and improves the grinding speed of the graphite product 200.

[0020] In order to enable the column 400 to support the lower surface of the graphite product 200, as shown in FIG. Figure 4 and Figure 7As shown, a partition 111 is fixedly installed on the inner wall of the through hole 110, and a circular groove is opened on the outer surface of the partition 111. The column 400 is set inside the circular groove and slidably installed with the inner wall of the circular groove. When the graphite product 200 is placed on the upper surface of the base 100, the lower surface of the graphite product 200 will press the top of the column 400 to move downward. By opening a limiting groove on the inner wall of the circular groove, a protrusion 420 is set on the circumferential outer surface of the column 400. The protrusion 420 is slidably installed with the inner wall of the limiting groove, limiting the column 400 to only up and down movement. After the column 400 supports the graphite product 200, in order to ensure the stability of the support, as shown in FIG. Figure 4 and Figure 8 As shown, the bottom end of the column 400 is fixedly mounted with a rod 440, and the interior of the base 100 is provided with a plurality of first grooves 120, such as Figure 6 As shown, a limiting unit 800 for fixing the position of the column 400 is provided inside the first groove 120. Specifically, the limiting unit 800 includes: a slide bar 810, a stopper 820, and a second guide column 830. The slide bar 810 is provided inside the first groove 120 and is slidably mounted on the inner wall of the first groove 120. The stopper 820 is provided inside the through hole 110 and is fixedly connected to the inner wall of the through hole 110. The rod body 440 is provided between the slide bar 810 and the stopper 820. The second guide column 830 is fixedly mounted on the slide bar 810. Away from the upper surface of one end of the rod body 440, the second guide column 830 is configured to drive the slide bar 810 to move along the central axis of the first groove 120 when it is moved by force. When the slide bar 810 moves close to the rod body 440, the rod body 440 is pressed between the slide bar 810 and the stop block 820, clamping the rod body 440, thereby fixing the position of the column 400, and the cross-section of the first groove 120 and the slide bar 810 is set to be rectangular, so that the slide bar 810 can only move along the central axis of the first groove 120.

[0021] In order to make the second guide post 830 bear the force to drive the slide bar 810 to move, the position of the column 400 is fixed, such as Figure 2 and Figure 3As shown, the base 100 is provided with a first driving unit 300 that drives the second guide column 830 to move. Specifically, the first driving unit 300 includes: a turntable 310 and a pneumatic telescopic rod 320. The turntable 310 is rotatably mounted on the outer circumferential surface of the base 100. A plurality of guide grooves 311 are equidistantly provided on the upper surface of the turntable 310 in the circumferential direction. The second guide column 830 is slidably mounted on the inner wall of the guide groove 311. One end of the pneumatic telescopic rod 320 is rotatably mounted on the outer circumferential surface of the base 100. The telescopic end of the pneumatic telescopic rod 320 is fixedly connected and rotatably connected to the upper surface of the turntable 310. When the rod body 440 needs to be clamped and fixed, the telescopic end of the pneumatic telescopic rod 320 is extended to drive the turntable 310 to rotate with the central axis of the base 100 as the rotation center, thereby driving the guide groove 311 to move. The guide groove 311 cooperates with the second guide column 830 to drive the slide bar 810 to move close to the rod body 440, thereby clamping it between the slide bar 810 and the stop block 820.

[0022] In order to achieve the coupling between the marking core 500 and the second driving unit 700, the marking core 500 can move along the central axis of the column 400, as shown in FIG. Figures 8-10 As shown, a plurality of openings 430 are provided on the circumferential outer surfaces of several cylinders 400, and a baffle 510 is fixedly installed on the bottom end of the marking core 500 through the top wall of the opening 430, and a tension spring 520 is fixedly connected to the lower surface of the baffle 510, and the bottom end of the tension spring 520 is fixedly connected to the bottom wall of the opening 430. When the second driving unit 700 is squeezed by the cylinder 400, at least one component inside the second driving unit 700 can drive the baffle 510 to move close to the graphite product 200, so that the baffle 510 drives the marking core 500 to move close to the graphite product 200, so that the top end of the marking core 500 contacts the lower surface of the graphite product 200, and the lower surface of the graphite product 200 is marked. The top end of the marking core 500 is a soft pen tip to avoid damaging or shaking the graphite product 200.

[0023] In order for at least one component inside the second driving unit 700 to drive the baffle 510 to move closer to the graphite product 200, as shown in FIG. Figure 4 and Figure 8As shown, the second drive unit 700 includes: a cylinder 770, a piston 760, an arc-shaped compression cylinder 710, an arc-shaped telescopic rod 720, a rotating sleeve 740, a top block 750 and a first spring 780. The cylinder 770 is arranged inside the through hole 110 and is fixedly connected to the inner wall of the through hole 110. The piston 760 is arranged inside the cylinder 770 and is slidably installed with the inner wall of the cylinder 770. The piston 760 is fixedly connected to the bottom end of the column 400. When the graphite product 200 is pressed to the top of the column 400, the column 400 moves downward, causing the piston 760 to move downward. Since the arc-shaped compression cylinder 710 is fixedly installed on the upper surface of the piston 760, the arc-shaped compression cylinder 710 is connected to the cylinder 400 through the conduit 730. The interior of the cylinder 770 is connected, and the interior of the arc compression cylinder 710, the conduit 730 and the cylinder 770 are filled with hydraulic oil, and the arc telescopic rod 720 is slidably installed between the inner walls of the arc compression cylinder 710. When the piston 760 moves downward, it squeezes the hydraulic oil at the bottom of the cylinder 770, so that the hydraulic oil enters the interior of the arc compression cylinder 710 through the conduit 730. Due to the entry of the hydraulic oil, the arc telescopic rod 720 extends from the interior of the arc compression cylinder 710. Because the rotating sleeve 740 The arc-shaped telescopic rod 720 is sleeved on the outer surface of the column 400 and is rotatably connected to the column 400. The telescopic end of the arc-shaped telescopic rod 720 is fixedly connected to the outer circumferential surface of the rotating sleeve 740. The arc-shaped compression cylinder 710 and the piston 760 are arranged at the same center. The column 400, the cylinder 770 and the rotating sleeve 740 are arranged at the same center. Therefore, the extension movement of the arc-shaped telescopic rod 720 drives the rotating sleeve 740 to rotate with the central axis of the column 400 as the rotation center. The inner wall of the rotating sleeve 740 is provided with an annular groove 741. The top block 750 is arranged inside the annular groove 741 and is fixedly connected to the inner wall of the annular groove 741. The top block 750 is provided with two bevels 751 at one end close to the column 400. When the rotating sleeve 740 rotates, the rotating sleeve 740 will drive the two bevels 751 on the baffle 510 to collide with the baffle 510, thereby lifting the baffle 510 through the bevels 751, so that the baffle 510 drives the marking core 500 to move close to the lower surface of the graphite product 200, thereby marking the lower surface of the graphite product 200.

[0024] In this solution, six marking cores 500 are provided. When the gap between the lower surface of the graphite product 200 and the upper surface of the base 100 is less than 0.05 mm, the six marking cores 500 will all be pushed out of the first hole 410, thereby leaving six marking points on the lower surface of the graphite product 200. When the gap between the lower surface of the graphite product 200 and the upper surface of the base 100 increases by 0.05 mm, one marking point will be less. Similarly, when there are less than six marking points, the spacing between the gaps is greater than 0.3 mm. At this time, the graphite product 200 is severely warped. The operator can determine whether the graphite product 200 is qualified based on the processing tolerance, thereby avoiding grinding the reverse side and wasting a lot of time. It should be noted that in this solution, there is a large area difference between the area of ​​the lower surface of the piston 760 and the area of ​​the end face of the arc-shaped telescopic rod 720. When the graphite product 200 drops by 0.05 mm, the telescopic distance of the arc-shaped telescopic rod 720 can be enlarged, thereby driving the six marking cores 500 to move.

[0025] In order to make the arc-shaped telescopic rod 720 reset, at the same time, the end of the column 400 can be against the lower surface of the graphite product 200, as shown in FIG. Figure 8 As shown, the first spring 780 is arranged inside the cylinder 770, one end of the first spring 780 is against the lower surface of the piston 760, and the other end of the first spring 780 is against the bottom wall of the cylinder 770. The elastic force of the first spring 780 drives the arc-shaped telescopic rod 720 to reset and enables the end of the column 400 to be against the lower surface of the graphite product 200. In order to enable the rod body 440 to be clamped, the bottom end of the rod body 440 in this solution passes through the bottom end of the cylinder 770.

[0026] In order to fix the position of the graphite product 200 after it is placed on the upper surface of the base 100, as shown in FIG. Figure 3 and Figure 15 As shown, a plurality of second grooves 130 are equidistantly provided on the circumferential outer surface of the base 100, and a splint 600 is slidably mounted on the inner walls of the plurality of second grooves 130. A connecting plate is fixedly mounted on the outer surface of the splint 600 away from the center of the base 100, and a first guide column 610 is fixedly mounted on the lower surface of the connecting plate. The first guide column 610 is slidably mounted on the inner wall of the guide groove 311. When the turntable 310 rotates, the first guide column 610 cooperates with the guide groove 311 to drive the splint 600 to move closer to the graphite product 200, thereby firmly clamping the graphite product 200 on the upper surface of the base 100, which is convenient for subsequent grinding processing.

[0027] Because when grinding the graphite product 200, the operator manually places the graphite product 200 on the upper surface of the base 100, and there will be errors in manual placement. When the clamping plate 600 clamps the graphite product 200, the position will be re-adjusted. At this time, when the graphite product 200 is just placed, the position marked by the marking core 500 will be offset, causing the marking core 500 to re-mark other marking points, resulting in a disorder in the number of marking points. It is difficult to identify the specific warping degree of the graphite product 200 later. In order to solve this problem, Figure 5 、 Figure 11 and Figure 12 As shown, the outer surface of the clamping plate 600 is penetrated by a mounting groove 620, and the interior of the mounting groove 620 is provided with an adjustment unit 900 for adjusting the position of the graphite product 200. The adjustment unit 900 includes: a column 910, a wave plate 970, a rotating block 920, a guide wheel 930, a slider 940, a push rod 950, a second spring 960 and a third spring 980. Because the rotating block 920 is rotatably installed between the inner walls of the mounting groove 620, one end of the rotating block 920 is set inside the second groove 130, as shown in FIG. Figure 14 As shown, a slide groove 921 is provided on the upper surface of the rotating block 920, and the slider 940 is slidably installed between the inner walls of the slide groove 921, and the lower surface of the graphite product 200 is against the upper surface of the slider 940, as shown in FIG. Figure 4 As shown, when the operator places the graphite product 200, he first places it on the upper surface of the slider 940. The multiple sliders 940 support the graphite product 200 so that it does not contact the upper surface of the base 100 and the top of the column 400. This prevents the marking core 500 from marking the lower surface of the graphite product 200 when the position is not yet correct. Figure 12 As shown, because the column 910 is set in the second groove 130 and fixedly connected to the bottom of the second groove 130, the outer surface of the column 910 close to the clamping plate 600 is provided with a groove, and the wave plate 970 is fixedly installed at the bottom of the groove, as shown in FIG. Figure 13As shown, the surface of the wave plate 970 is evenly provided with a plurality of pits, and the top rod 950 is fixedly installed on the end of the slider 940 near the column 910, and one end of the top rod 950 abuts against the pit on the surface of the wave plate 970. The guide wheel 930 is rotatably installed on the outer surface of the opposite sides of the rotating block 920, and the guide wheel 930 abuts against the outer surface of the side of the column 910 near the splint 600. When the splint 600 moves close to the graphite product 200 to clamp it, it will drive the rotating block 920 to move close to the column 910. Through the action of the guide wheel 930 and the rotating block 920 having an inclined angle relative to the splint 600, the rotating block 920 is rotated downward near the splint 600. At this time, the rotating block 920 drives the top rod 950 to move downward, because the second spring 960 is arranged inside the slide groove 921, one end of the second spring 960 is fixedly connected to the outer surface of the slider 940, and the other end of the second spring 960 is away from the slide groove 921. When the push rod 950 moves downward, it will always be against the pit of the wave plate 970 under the action of the second spring 960. When the push rod 950 slides relative to the pit, it will also slide back and forth along the central axis of the slide groove 921, so that the slider 940 slides back and forth relative to the outer surface of the graphite product 200. Because as the rotating block 920 rotates downward, the angle between it and the clamping plate 600 will become smaller and smaller. Then, through the self-gravity of the graphite product 200, the graphite product 200 will slowly find the center position between the multiple clamping plates 600, so that when the graphite product 200 contacts the column 400, its position is at the center position between the multiple clamping plates 600, avoiding the confusion of the number of marking points caused by the change in position when the marking core 500 is subsequently marked. With the continuous clamping movement of the clamping plate 600, the rotating block 920 will drive the slider 940 to move completely to the inside of the second groove 130. At the same time, when the graphite product 200 first contacts the top of the column 400, the alignment of the graphite product 200 causes the lower surface of the graphite product 200 to slide slightly relative to the top of the column 400. This movement allows dirt between the contact surfaces of the graphite product 200 and the column 400 to be rubbed off, thus preventing the subsequent placement of the graphite product 200 on the base 100 from being affected. To restrict the movement of the slider 940 to the central axis of the slide 921, the cross-sectional shape of the slider 940 and the slide 921 is trapezoidal. Similarly, the cross-sectional shape of the mating portion of the clamping plate 600 and the second groove 130 is also trapezoidal.

[0028] Since the third spring 980 is arranged in the second groove 130, one end of the third spring 980 is fixedly connected to the lower surface of the rotating block 920, and the other end of the third spring 980 is fixedly connected to the outer surface of the clamping plate 600. When the clamping plate 600 is loosened, as it slowly slides away from the graphite product 200, the rotating block 920 is driven to rotate upward by the force of the third spring 980, thereby slowly pushing up the graphite product 200 through the slider 940. At this time, because the graphite product 200 is not subjected to other external forces, its position is the same as the position when clamped, and will not deviate, thereby ensuring the accuracy of the punctuation position of the marking core 500.

[0029] It should be noted that a rubber pad is provided between the clamping surfaces of the clamping plate 600, the slide rod 810 and the stop block 820. The elastic deformation ability of the rubber pad allows the three to adapt their strokes during the clamping movement, and does not result in completely rigid contact.

[0030] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A graphite product grinding fixture, characterized in that: include: A base (100) is used to support the graphite product (200), and a plurality of through holes (110) are formed in the interior of the base (100); A plurality of columns (400) are arranged inside the through hole (110), the plurality of columns (400) can support the graphite product (200), and a plurality of first holes (410) are formed inside each of the plurality of columns (400); A plurality of marking cores (500) are arranged inside the first hole (410), and the plurality of marking cores (500) are arranged so as to mark different numbers of marking points on the lower surface of the graphite product (200) according to the spacing of the gap when there is a gap between the lower surface of the graphite product (200) and the contact surface of the upper surface of the base (100); The second driving unit (700) is arranged inside the through hole (110), and the marking core (500) and the second driving unit (700) are coupled. The second driving unit (700) is configured to drive the marking core (500) to move along the central axis of the column (400) when it is squeezed by the column (400), so that the marking core (500) can mark a marking point on the lower surface of the graphite product (200).

2. The graphite product grinding fixture according to claim 1, characterized in that: A partition (111) is fixedly mounted on the inner wall of the through hole (110), and a circular groove is provided through the outer surface of the partition (111). The column (400) is arranged inside the circular groove and slidably mounted on the inner wall of the circular groove. A limiting groove is provided on the inner wall of the circular groove. A protrusion (420) is provided on the circumferential outer surface of the column (400), and the protrusion (420) is slidably mounted on the inner wall of the limiting groove.

3. The graphite product grinding fixture according to claim 1, characterized in that: A rod body (440) is fixedly mounted at the bottom end of the column (400), a plurality of first slots (120) are provided inside the base (100), and a position-limiting unit (800) for fixing the position of the column (400) is provided inside the first slot (120), and the position-limiting unit (800) comprises: A sliding rod (810) is disposed inside the first groove (120) and is slidably mounted on the inner wall of the first groove (120); a stopper (820) disposed inside the through hole (110) and fixedly connected to the inner wall of the through hole (110); and the rod body (440) is disposed between the slide rod (810) and the stopper (820); The second guide column (830) is fixedly mounted on the upper surface of the sliding rod (810) at one end away from the rod body (440). The second guide column (830) is configured to drive the sliding rod (810) to move along the central axis of the first groove (120) when it is moved by force, thereby pressing the rod body (440) between the sliding rod (810) and the stop block (820), thereby fixing the position of the column body (400).

4. The graphite product grinding fixture according to claim 3, characterized in that: The base (100) is provided with a first driving unit (300) for driving the second guide column (830) to move, and the first driving unit (300) includes: A turntable (310) is rotatably mounted on the outer circumferential surface of the base (100), a plurality of guide grooves (311) are equidistantly provided on the upper surface of the turntable (310) in the circumferential direction, and the second guide column (830) is slidably mounted on the inner wall of the guide groove (311); A pneumatic telescopic rod (320) is provided, wherein one end of the pneumatic telescopic rod (320) is fixedly connected to the circumferential outer surface of the base (100), and the telescopic end of the pneumatic telescopic rod (320) is rotatably connected to the upper surface of the turntable (310).

5. The graphite product grinding fixture according to claim 3, characterized in that: The circumferential outer surfaces of the plurality of cylinders (400) are each provided with a plurality of openings (430); the bottom end of the marking core (500) passes through the top wall of the opening (430) and is fixedly mounted with a baffle (510); the lower surface of the baffle (510) is fixedly connected with a tension spring (520); the bottom end of the tension spring (520) is fixedly connected to the bottom wall of the opening (430).

6. The graphite product grinding fixture according to claim 3, characterized in that: The second driving unit (700) comprises: A cylinder (770) is disposed inside the through hole (110) and fixedly connected to the inner wall of the through hole (110); A piston (760) is disposed inside the cylinder (770) and is slidably mounted on the inner wall of the cylinder (770). The piston (760) is fixedly connected to the bottom end of the column (400); An arc-shaped compression cylinder (710) is fixedly mounted on the upper surface of the piston (760), and the arc-shaped compression cylinder (710) is connected to the interior of the cylinder (770) through a conduit (730); An arc-shaped telescopic rod (720) is slidably mounted between the inner walls of the arc-shaped compression cylinder (710); A rotating sleeve (740) is sleeved on the outer surface of the column (400) and is rotatably connected to the column (400). The telescopic end of the arc-shaped telescopic rod (720) is fixedly connected to the circumferential outer surface of the rotating sleeve (740). The inner wall of the rotating sleeve (740) is provided with an annular groove (741); A top block (750) is disposed inside the annular groove (741) and fixedly connected to the inner wall of the annular groove (741). The top block (750) is provided with two oblique angles (751) at one end close to the column (400), and the two oblique angles (751) abut against the baffle (510); The first spring (780) is arranged inside the cylinder (770), one end of the first spring (780) is against the lower surface of the piston (760), and the other end of the first spring (780) is against the bottom wall of the cylinder (770).

7. The graphite product grinding fixture according to claim 6, characterized in that: The arc-shaped compression cylinder (710) and the piston (760) are arranged at the same center of a circle, the column (400), the cylinder (770) and the rotating sleeve (740) are arranged at the same center of a circle, and the bottom end of the rod (440) passes through the bottom end of the cylinder (770).

8. The graphite product grinding fixture according to claim 4, characterized in that: The circumferential outer surface of the base (100) is provided with a plurality of second grooves (130) at equal intervals, and the inner walls of the plurality of second grooves (130) are all slidably mounted with a clamping plate (600), and the outer surface of the clamping plate (600) away from the center of the base (100) is fixedly mounted with a connecting plate, and the lower surface of the connecting plate is fixedly mounted with a first guide column (610), and the first guide column (610) is slidably mounted with the inner wall of the guide groove (311), and the outer surface of the clamping plate (600) is penetrated by a mounting groove (620).

9. The graphite product grinding fixture according to claim 8, characterized in that: An adjusting unit (900) for adjusting the position of the graphite product (200) is provided inside the installation groove (620), and the adjusting unit (900) comprises: A column (910) is disposed in the second groove (130) and fixedly connected to the bottom of the second groove (130), wherein the outer surface of the column (910) on a side close to the splint (600) is provided with a groove; A wave plate (970) is fixedly mounted on the bottom of the groove, and a plurality of pits are evenly arranged on the surface of the wave plate (970); A rotating block (920) is rotatably mounted between the inner walls of the mounting groove (620), one end of the rotating block (920) is disposed inside the second groove (130), and a sliding groove (921) is provided on the upper surface of the rotating block (920); Guide wheels (930) are rotatably mounted on the outer surfaces of the rotating block (920) on opposite sides, and the guide wheels (930) abut against the outer surface of the column (910) on the side close to the splint (600); A slider (940) is slidably mounted between the inner walls of the slide groove (921), wherein the lower surface of the graphite product (200) abuts against the upper surface of the slider (940); A push rod (950) is fixedly mounted on one end of the slider (940) close to the column (910), and one end of the push rod (950) abuts against a recess on the surface of the wave plate (970); A second spring (960) is disposed inside the slide groove (921), one end of the second spring (960) is fixedly connected to the outer surface of the slider (940), and the other end of the second spring (960) is fixedly connected to the inner wall of the slide groove (921) away from the column (910); A third spring (980) is disposed in the second groove (130), one end of the third spring (980) is fixedly connected to the lower surface of the rotating block (920), and the other end of the third spring (980) is fixedly connected to the outer surface of the clamping plate (600).

10. The graphite product grinding fixture according to claim 9, characterized in that: The rotating block (920) is provided with an inclined angle relative to the clamping plate (600).

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