A method of machining a graphite workpiece

Abstract

The application relates to the field of carbon material processing, and discloses a graphite workpiece processing method, which comprises the following steps: crushing graphite raw materials, ball milling to obtain nanoscale graphite powder, mixing a binder with the nanoscale graphite powder according to a mass ratio, uniformly mixing, sintering in a sintering furnace to obtain graphite blank, and conveying the graphite blank to a cutting device to be shaped and cut to obtain a graphite workpiece with a required size. The graphite workpiece processing method adopts a ball mill to finely mill the graphite raw materials in stages in a low-energy and high-energy mode, improves the fineness of the graphite powder, adopts a binder to uniformly mix with the nanoscale graphite powder for sintering and solidification, improves the structural strength of the graphite workpiece blank, and facilitates subsequent fine machining of the graphite workpiece blank; the cutting device adopts a conveying mechanism and a cutting mechanism to realize efficient cutting of the graphite workpiece blank; the cutting device meets the cutting requirements of graphite workpiece blanks with different sizes and meets subsequent processing requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of carbon material processing, in particular to a graphite workpiece processing method. BACKGROUND

[0002] Graphite material is a basic material with many excellent properties, especially at high temperatures >1200℃, it can still guarantee sufficient product performance, which is not achieved by ordinary metal materials. However, the structural strength of graphite workpieces prepared by conventional methods is insufficient, and graphite material has a major defect that it will be oxidized in an oxygen-containing environment, thereby affecting the function realization of the graphite workpiece. In addition, in the production process of some standard workpieces, the efficiency of preparing graphite workpiece blanks by using a single mold sintering method needs to be further improved. Therefore, it is of great significance to provide a graphite workpiece processing method that can meet the high quality and high efficiency requirements. SUMMARY

[0003] The purpose of the present application is to provide a graphite workpiece processing method, which improves the structural strength of graphite workpiece blanks by high-energy fine grinding of graphite raw materials and sintering and solidification with a binder, and efficiently realizes the efficient cutting of graphite workpiece blanks with a cutting device to meet the subsequent processing requirements.

[0004] Technical solution: The graphite workpiece processing method provided by the present application comprises the following steps:

[0005] Step S1: The graphite raw material is placed in a crusher for crushing, and then high-energy ball milling is performed to obtain nanoscale graphite powder;

[0006] Step S2: The binder and the nanoscale graphite powder are placed in a stirring device in a mass ratio of (0.1~0.4):1, and are uniformly mixed at a stirring speed of 150~200r / min for 30~60min until the graphite powder becomes a viscous slurry. The viscous slurry is placed in a processing mold and sintered in a sintering furnace to obtain a graphite blank;

[0007] Step S3: The graphite blank is transported to a cutting device for sizing and cutting to obtain a graphite workpiece of the required size.

[0008] Preferably, the high-energy ball milling in step S1 comprises the following steps:

[0009] Step S 11 : Dry and weigh the graphite block, and add it to the ball mill pot. Add hard alloy grinding balls in a ball-to-material ratio of (1~5):1. After vacuumizing the ball mill pot, fill it with argon or nitrogen, and repeat the process 1~3 times to ensure that the ball milling process is in a vacuum state;

[0010] Step S 12: the ball milling tank is placed on the ball mill to perform low-speed and low-energy ball milling in an intermittent positive and negative alternating rotation mode; wherein the ball milling is performed for 5-10 min, followed by an intermittent period of 5 min, and then the ball milling is performed in a positive and negative alternating rotation mode, the rotation speed of the ball mill is 150-250 r / min, and the ball milling time is 1-3 h;

[0011] Step S 13 : the ball milling tank is placed on the ball mill to perform high-energy ball milling in an intermittent positive and negative alternating rotation mode; wherein the ball milling is performed for 20-60 min, followed by an intermittent period of 15 min, and then the ball milling is performed in a positive and negative alternating rotation mode, the rotation speed of the ball mill is 400-600 r / min, and the ball milling time is 1-3 h;

[0012] Step S 14 : the ball milling tank is placed in a vacuum drying box at 50-80℃ to stand for 2-4 h in an inert gas atmosphere, thereby obtaining the nanoscale graphite powder.

[0013] Preferably, in step S2, the sintering temperature is 600-750℃, the sintering pressure is 10-15 MPa, the holding time is 30-60 min, the heating speed is 10-30℃ / min, and the vacuum degree is 1×10 -3 Pa.

[0014] Preferably, the binder is a viscous solution formed by uniformly mixing a viscous material and a solvent in a ratio of (0.1-0.5):1;

[0015] The viscous material is one or a combination of phenolic resin, epoxy resin, furan resin, urea-formaldehyde resin, polyamide, acrylic resin, polyethylene, polypropylene, polystyrene, and asphalt.

[0016] The solvent is one or a combination of methanol, ethanol, propanol, ethylene glycol, propylene glycol, ketone, acetone, benzene, or toluene.

[0017] Preferably, in step S3, the cutting device comprises a conveying mechanism and a cutting mechanism mounted on the conveying mechanism;

[0018] The conveying mechanism comprises a conveying frame and transmission rollers rotatably connected to both ends of the conveying frame, a plurality of belt grooves are distributed along the axial direction of the transmission rollers, conveying belts are tensioned between the corresponding belt grooves of the two transmission rollers, and cutting slots are formed between adjacent two conveying belts;

[0019] The cutting mechanism comprises support side plates fixedly connected to both sides of the conveying frame and a cutting mechanism rotatably arranged between the support side plates, the cutting mechanism comprises a power shaft, a plurality of cutting blades arranged at equal intervals on the power shaft, and a cutting knife arranged at intervals with the cutting blades, the cutting blades are arranged corresponding to the cutting slots and cut along the length direction of the graphite workpiece, and the cutting knife cuts along the width direction of the graphite workpiece.

[0020] Preferably, a guide sliding groove is formed on the support side plate, a bearing seat for installing the power shaft is slidably connected in the guide sliding groove, a driving cylinder is arranged at the top end of the support side plate and corresponds to the guide sliding groove, the lower end of the piston rod of the driving cylinder is fixedly connected with the bearing seat, and the driving cylinder drives the cutting mechanism to move up and down along the guide sliding groove.

[0021] Preferably, the cutting tool comprises a cutting tool holder, the cutting tool holder comprises a holder body and a plurality of connecting tooth seats distributed along the circumference of the holder body, and at least one connecting tooth seat is fixedly connected with a cutting blade.

[0022] Preferably, the conveying frame is provided with a driving mechanism, the driving mechanism comprises side end plates and mounting plates fixedly connected with two side support beams of the conveying frame respectively, the side end plates and the mounting plates are trihedral rotationally connected with a tensioning roller, a driving roller and a guide roller, and a plurality of conveying belts are arranged side by side and sequentially wound on the tensioning roller, the driving roller and the guide roller.

[0023] The mounting plate is provided with a driving motor, two power wheels are arranged at the shaft end of the driving motor, and the power wheels are drivingly connected with a first transmission wheel arranged at the shaft end of the power shaft and a second transmission wheel arranged at the shaft end of the driving roller through transmission belts.

[0024] Preferably, one side of the mounting plate is provided with a tensioning mechanism corresponding to the transmission belt of the driving cutting mechanism, the tensioning mechanism comprises a fixed seat, a support column and a column sleeve rotationally sleeved on the support column are fixedly arranged on the fixed seat, a coil spring is arranged between the column sleeve and the support column, a support shaft and an adjusting roller rotationally sleeved on the support shaft are arranged at the end of a support arm fixedly arranged on one side of the column sleeve.

[0025] Preferably, a plurality of arc-shaped long holes and fixing bolts arranged in the arc-shaped long holes are formed along the circumference of the fixed seat, mounting position grooves corresponding to the two ends of one of the arc-shaped long holes are arranged on the side wall of the fixed seat, limit screws are threadedly connected on the mounting position grooves, and the two limit screws cooperate to lock the corresponding fixing bolt.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. The graphite workpiece processing method improves the fineness of graphite powder by adopting a ball mill to finely grind graphite raw materials in stages in combination of low energy and high energy, and improves the structural strength of graphite workpiece blanks by adopting a binder to uniformly mix with nanoscale graphite powder and sinter and solidify, so as to facilitate subsequent fine machining of the graphite workpiece blanks.

[0028] 2、The cutting device of the present application adopts a conveying mechanism to cooperate with the cutting mechanism to realize efficient cutting of graphite workpiece blanks; the cutting mechanism realizes the cutting requirements of graphite workpiece blanks of different sizes by setting different numbers of cutting blades and cutting-off blades, thereby meeting the subsequent processing requirements.

[0029] 3、The cutting mechanism is convenient to use and stable in cutting, and is convenient for subsequent maintenance and replacement of the cutting parts. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The figure is a process flow diagram of the graphite workpiece processing method of the present application.

[0031] Figure 2 The figure is a structure diagram of the cutting device of the present application.

[0032] Figure 3 The figure is a structure diagram of the cutting mechanism. Figure 2 The figure is a structure diagram of the cutting mechanism.

[0033] Figure 4 The figure is a structure diagram of the cutting mechanism. Figure 3 The figure is a structure diagram of the cutting mechanism.

[0034] Figure 5 The figure is a structure diagram of the cutting mechanism. Figure 3 The figure is a structure diagram of the cutting mechanism.

[0035] Figure 6 The figure is a structure diagram of the cutting mechanism. Figure 4 The figure is a structure diagram of the cutting mechanism. Figure 5 The figure is a structure diagram of the cutting mechanism.

[0036] Figure 7 The figure is a structure diagram of the cutting mechanism. Figure 6 The figure is a structure diagram of the cutting mechanism.

[0037] Figure 8 The figure is a structure diagram of the cutting mechanism. Figure 2 The figure is a structure diagram of the cutting mechanism.

[0038] Figure 9 The figure is a structure diagram of the cutting mechanism. Figure 8 The figure is a structure diagram of the cutting mechanism.

[0039] Figure 10 The figure is a structure diagram of the cutting mechanism. Figure 9 The figure is a structure diagram of the cutting mechanism.

[0040] Reference signs:

[0041] 100, cutting device;

[0042] 1. Cutting mechanism; 11. Support side plate; 111. Guide groove; 12. Bearing seat; 13. Drive cylinder; 14. Support connecting rod; 15. First transmission wheel; 16. Cutting mechanism; 161. Power shaft; 162. Cutting blade; 163. Cutting knife; 1631. Cutting knife holder; 16311. Frame; 16312. Connecting gear seat; 16313. Shaft hole; 16314. Connecting hole; 1632. Cutting blade; 164. Connecting rod;

[0043] 2. Conveying mechanism; 21. Conveyor belt; 211. Cutting slit; 22. Conveyor frame; 23. Support side beam; 24. Drive roller; 241. Belt groove; 25. Support plate; 251. Cutting groove; 26. Drive mechanism; 261. Side end plate; 262. Mounting plate; 263. Elongated hole; 264. Tensioning roller; 265. Drive roller; 266. Guide roller; 267. Second transmission wheel; 268. Drive motor; 269. Tensioning mechanism; 2691. Fixed seat; 26911. Arc-shaped elongated hole; 26912. Fixing bolt; 26913. Limiting screw; 26914. Mounting slot; 2692. Support column; 2693. Column sleeve; 2694. Support arm; 2695. Support shaft; 2696. Adjusting roller; 2610. Drive wheel. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings. Figures 1-10 The technical solutions of the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0045] like Figure 1 As shown, a method for processing a graphite workpiece according to the present invention includes the following steps:

[0046] Step S1: The graphite raw material is placed in a crusher for crushing, and then subjected to high-energy ball milling to obtain nano-sized graphite powder. The specific steps of high-energy ball milling are as follows:

[0047] Step S 11 Dry and weigh the graphite blocks, add them to the ball mill jar, and add cemented carbide grinding balls at a ball-to-material ratio of 1~5:1; evacuate the ball mill jar and then fill it with argon or nitrogen gas, repeating this process 1~3 times to ensure that the ball milling process is in a vacuum state.

[0048] Step S 12: the ball milling tank is placed on the ball mill to carry out low-speed and low-energy ball milling in an intermittent positive and negative alternating rotation mode; wherein, the ball milling is carried out for 5-10 min, the intermittent time is 5 min, then the positive and negative alternating ball milling is carried out, the rotation speed of the ball mill is 150-250 r / min, and the ball milling time is 1-3 h;

[0049] Step S 13 : the ball milling tank is placed on the ball mill to carry out high-energy ball milling in an intermittent positive and negative alternating rotation mode; wherein, the ball milling is carried out for 20-60 min, the intermittent time is 15 min, then the positive and negative alternating ball milling is carried out, the rotation speed of the ball mill is 400-600 r / min, and the ball milling time is 1-3 h;

[0050] Step S 14 : the ball milling tank is placed in a vacuum drying box at 50-80 DEG C to stand for 2-4 h in an inert gas atmosphere, and the nanoscale graphite powder is prepared.

[0051] Step S2: the binder and the nanoscale graphite powder are placed in a stirring device in a mass ratio of (0.1-0.4):1, and are uniformly mixed for 30-60 min at a rotation speed of 150-200 r / min until the graphite powder becomes a viscous slurry, the viscous slurry is placed in a processing mold, the processing mold is placed in a sintering furnace, and the graphite blank is prepared by sintering at a sintering temperature of 600-750 DEG C, a sintering pressure of 10-15 MPa, a vacuum degree of 1*10 -3 Pa, a temperature rising speed of 10-30 DEG C / min, and a holding time of 30-180 min. The binder is a viscous solution formed by uniformly mixing a viscous material and a solvent in a ratio of (0.1-0.5):1; the viscous material is one or a combination of phenolic resin, epoxy resin, furan resin, urea-formaldehyde resin, polyamide, acrylic resin, polyethylene, polypropylene, polystyrene, and asphalt; and the solvent is one or a combination of methanol, ethanol, propanol, ethylene glycol, propylene glycol, ketone, acetone, benzene, or toluene.

[0052] Step S3: the graphite blank is delivered to a cutting device for shaping and cutting to prepare a graphite workpiece with a required size.

[0053] Example 1

[0054] The processing method of the graphite workpiece comprises the following steps:

[0055] Step S1: the graphite raw material is placed in a crusher for crushing, and then high-energy ball milling is carried out to prepare nanoscale graphite powder, wherein the high-energy ball milling comprises the following steps:

[0056] Step S 11: The graphite block is dried and weighed, and is added into a ball mill tank, and hard alloy grinding balls are added according to a ball-to-material ratio of 1:1; the ball mill tank is vacuumized and then filled with argon or nitrogen, and the process is repeated for 3 times, so that the ball milling process is in a vacuum state;

[0057] Step S 12 : The ball mill tank is placed on the ball mill, and low-speed and low-energy ball milling is performed in an intermittent positive and negative alternating rotation mode; wherein, the ball milling is performed for 5 minutes, and the intermittent time is 5 minutes, then the positive and negative alternating ball milling is performed, the rotation speed of the ball mill is 250 r / min, and the ball milling time is 1 hour;

[0058] Step S 13 : The ball mill tank is placed on the ball mill, and high-energy ball milling is performed in an intermittent positive and negative alternating rotation mode; wherein, the ball milling is performed for 20 minutes, and the intermittent time is 15 minutes, then the positive and negative alternating ball milling is performed, the rotation speed of the ball mill is 600 r / min, and the ball milling time is 1 hour;

[0059] Step S 14 : The ball mill tank is placed in a vacuum drying box at 80 DEG C and is placed in an inert gas atmosphere for 2 hours, so that the nanoscale graphite powder is prepared.

[0060] Step S2: The binder and the nanoscale graphite powder are placed in a stirring device according to a mass ratio of 0.1:1, and are uniformly mixed for 30 minutes at a rotation speed of 150 r / min, until the graphite powder becomes a viscous slurry; the viscous slurry is placed in a processing mold, and the processing mold is placed in a sintering furnace, so that the graphite blank is prepared by sintering under the conditions of a sintering temperature of 600 DEG C, a sintering pressure of 10 MPa, a vacuum degree of 1*10 -3 Pa, a temperature rising speed of 10 DEG C / min, and a holding time of 180 min. The binder is prepared by mixing phenolic resin and propanol according to a mass ratio of 0.1:1.

[0061] Step S3: The graphite blank is transported to a cutting device for shaping and cutting, so that the graphite workpiece with a required size is prepared.

[0062] Example 2

[0063] The processing method of the graphite workpiece comprises the following steps:

[0064] Step S1: The graphite raw material is placed in a crusher for crushing, and then high-energy ball milling is performed, so that the nanoscale graphite powder is prepared; wherein, the high-energy ball milling comprises the following steps:

[0065] Step S 11 : The graphite block is dried and weighed, and is added into a ball mill tank, and hard alloy grinding balls are added according to a ball-to-material ratio of 1:1; the ball mill tank is vacuumized and then filled with argon or nitrogen, and the process is repeated for 3 times, so that the ball milling process is in a vacuum state;

[0066] Step S12 : the ball mill tank is placed on the ball mill, and low-speed and low-energy ball milling is carried out in an intermittent positive and negative alternating rotation mode; wherein the ball milling is carried out for 7 min, the intermittent time is 5 min, then the positive and negative rotation is alternately carried out, the rotation speed of the ball mill is 200 r / min, and the ball milling time is 2 h;

[0067] Step S 13 : the ball mill tank is placed on the ball mill, and high-energy ball milling is carried out in an intermittent positive and negative alternating rotation mode; wherein the ball milling is carried out for 40 min, the intermittent time is 15 min, then the positive and negative rotation is alternately carried out, the rotation speed of the ball mill is 500 r / min, and the ball milling time is 2 h;

[0068] Step S 14 : the ball mill tank is placed in a 70℃ vacuum drying box and is placed for 3 h in an inert gas atmosphere, so as to obtain the nanoscale graphite powder.

[0069] Step S2: the binder and the nanoscale graphite powder are placed in a stirring device in a mass ratio of 0.3:1, and are uniformly stirred at a rotation speed of 175 r / min for 45 min until the graphite powder becomes a viscous slurry; the viscous slurry is placed in a processing mold, and the processing mold is placed in a sintering furnace; the sintering temperature is 700℃, the sintering pressure is 13 MPa, the vacuum degree is 1*10 -3 Pa, the temperature rising speed is 20℃ / min, and the holding time is 120 min, so as to obtain the graphite blank. The binder is a viscous solution formed by uniformly mixing acrylic resin and propylene glycol in a ratio of 0.2:1.

[0070] Step S3: the graphite blank is transported to a cutting device for shaping and cutting, so as to obtain a graphite workpiece with a required size.

[0071] Example 3:

[0072] The processing method of the graphite workpiece comprises the following steps:

[0073] Step S1: the graphite raw material is placed in a crusher for crushing, and then high-energy ball milling is carried out, so as to obtain the nanoscale graphite powder; wherein the high-energy ball milling comprises the following steps:

[0074] Step S 11 : the graphite block is dried and weighed, and is added into the ball mill tank; hard alloy grinding balls are added in a ball-to-material ratio of 5:1; the ball mill tank is vacuumized and then is filled with argon or nitrogen, and the operation is repeated once, so as to ensure that the ball milling process is in a vacuum state;

[0075] Step S 12: The ball mill tank is placed on the ball mill to perform low-speed and low-energy ball milling in an intermittent positive and negative alternating rotation mode; wherein the ball milling is performed for 10 min, followed by an intermittent period of 5 min, and then the positive and negative alternating ball milling is performed, the rotation speed of the ball mill is 150 r / min, and the ball milling time is 3 h;

[0076] Step S 13 : The ball mill tank is placed on the ball mill to perform high-energy ball milling in an intermittent positive and negative alternating rotation mode; wherein the ball milling is performed for 60 min, followed by an intermittent period of 15 min, and then the positive and negative alternating ball milling is performed, the rotation speed of the ball mill is 400 r / min, and the ball milling time is 3 h;

[0077] Step S 14 : The ball mill tank is placed in a vacuum drying box at 50℃ for 4 h in an inert gas atmosphere to obtain the nanoscale graphite powder.

[0078] Step S2: The binder and the nanoscale graphite powder are placed in a stirring device in a mass ratio of 0.4:1, and are uniformly mixed at a rotation speed of 200 r / min for 30 min until the graphite powder becomes a viscous slurry. The viscous slurry is placed in a processing mold, and the processing mold is placed in a sintering furnace to perform sintering at a sintering temperature of 750℃, a sintering pressure of 15 MPa, a vacuum degree of 1x10 -3 Pa, a temperature rising speed of 30℃ / min, and a holding time of 30 min to obtain the graphite blank. The binder is a viscous solution formed by uniformly mixing polystyrene and ketone in a ratio of 0.5:1.

[0079] Step S3: The graphite blank is transported to a cutting device for shaping and cutting to obtain graphite workpieces of a desired size.

[0080] In the above Examples 1-3, as Figures 2-4 and Figure 8As shown, the cutting device 100 of the present invention includes a conveying mechanism 2 and a cutting mechanism 1 mounted on the conveying mechanism 2. The conveying mechanism 2 includes a conveyor frame 22 and drive rollers 24 rotatably connected to both ends of the conveyor frame 22. The drive rollers 24 have multiple belt grooves 241 distributed along their axial direction. A conveyor belt 21 is tensioned between the corresponding belt grooves 241 of two drive rollers 24. That is, the conveying mechanism 2 includes multiple conveyor belts 21. A cutting slit 211 is formed between two adjacent conveyor belts 21. The multiple conveyor belts 21 can be synchronously driven through the drive rollers 24 to meet the conveying requirements of plate-shaped graphite workpieces. The cutting mechanism 1 includes support side plates 11 fixedly connected to both sides of the conveyor frame 22 and a cutting mechanism 16 rotatably disposed between the support side plates 11. A support connecting rod 14 is fixedly connected between the top ends of the two support side plates 11 for reinforcement. The cutting mechanism 16 includes a power shaft 161, multiple cutting blades 162 evenly spaced on the power shaft 161, and cutting blades 163 spaced apart from the cutting blades. The cutting blades 162 are corresponding to the cutting seam 211 and cut along the length of the graphite workpiece, while the cutting blades 163 cut along the width of the graphite workpiece. During operation, when the plate-shaped graphite workpiece blank is conveyed to the bottom of the cutting mechanism 1 through the conveyor mechanism 2, the multiple cutting blades 162 can simultaneously cut along the length of the plate-shaped graphite workpiece, realizing multiple simultaneous cuts of the graphite workpiece blank. The cutting blades 163 can cut the corresponding strip-shaped graphite workpieces into equal lengths to facilitate subsequent machining of the graphite workpiece.

[0081] like Figures 4-6 As shown, the spacing between the various cutting blades 162 mounted on the drive shaft 161 is adjustable. When the graphite workpiece requires narrower cutting, a narrower cutting blade spacing is set, such as... Figure 4 As shown; when the graphite workpiece needs to be cut wider, a wider cutting blade spacing is set, such as... Figure 5 As shown; specifically, the spacing of the cutting blades 162 is achieved by the number of cutting blades 163 between them. If a narrower spacing is set, a set of cutting blades can be set between two cutting blades. If a wider spacing is set, two, three or even more sets of cutting blades 163 can be set between two cutting blades.

[0082] like Figures 6-7As shown, the cutting tool 163 includes a cutting tool holder 1631, which includes a holder body 16311 and a plurality of connecting tooth seats 16312 distributed along the circumference thereof, and at least one of the connecting tooth seats 16312 is fixedly connected with a cutting blade 1632. Specifically, the number of the cutting blades 1632 is set according to the required length of the graphite workpiece, for example, if the required length of the graphite workpiece is long, one connecting tooth seat is connected with a cutting blade, and if the required length of the graphite workpiece is short, a plurality of connecting tooth seats can be connected with cutting blades according to the requirement, and when all the connecting tooth seats are connected with cutting blades, the cutting of the short graphite workpiece can be satisfied. In addition, the cutting length of the graphite workpiece can be further controlled by matching the conveying speed of the conveying mechanism 2 and the rotating speed of the cutting mechanism 16.

[0083] As shown in the drawings, Figure 6 As shown, the holder body 16311 is axially provided with a shaft hole 16313, and a connecting hole 16314 is formed along the circumference of the shaft hole. The adjacent cutting tools 163 and the cutting blade 162 are fixedly connected into an integrated structure by a plurality of connecting rods 164 arranged in the circumferential direction, so as to ensure the stability of the overall structure of the cutting mechanism 16 and reduce the breaking rate of the cutting blade.

[0084] As shown in the drawings, Figure 3 As shown, the two support side plates 11 are correspondingly provided with guide sliding grooves 111, the guide sliding grooves 111 are slidably connected with bearing seats 12 for installing the power shaft 161, the top end of the support side plate 11 is provided with a driving cylinder 13 corresponding to the guide sliding groove 111, the lower end of the piston rod of the driving cylinder 13 is fixedly connected with the bearing seat 12, and the driving cylinder 13 can drive the cutting mechanism 16 to ascend and descend along the guide sliding groove 111. In general working state, the driving cylinder 13 drives the cutting mechanism 16 to descend along the guide sliding groove 111 through the piston rod thereof, and controls the cutting blade 162 to be correspondingly inserted into the cutting slot 211, so as to adjust the cutting position of the graphite workpiece; when it is required to cut a thicker graphite workpiece or to replace the cutting blade and the cutting blade, the cutting mechanism 16 is lifted by the driving cylinder for disassembly and replacement.

[0085] As shown in the drawings, Figure 8 As shown, the conveying mechanism 2 includes a conveying frame 22, a support plate 25 is arranged between the two transmission rollers 24 and the two side support edge beams 23 at the top end of the conveying frame 22, the support plate 25 is provided with a cutting groove 251 corresponding to the cutting slot 211 between the conveying belt 21 and the support plate 25, and the cutting groove 251 can accommodate the cutting blade 162. The support plate 25 can support the conveying belt 21 during the conveying process, reduce the deformation of the conveying belt, and improve the stability of the cutting process.

[0086] As shown in the drawings, Figures 8-9As shown, the driving mechanism 26 is correspondingly arranged at the lower side of the support edge beam 23 on both sides of the conveying frame 22, the driving mechanism 26 comprises a side end plate 261 and a mounting plate 262 fixedly connected with the support edge beam 23 on both sides of the conveying frame respectively, and a tensioning roller 264, a driving roller 265 and a guide roller 266 are triangularly rotatably connected between the side end plate 261 and the mounting plate 262, and the plurality of conveying belts 21 are sequentially and side by side wound on the tensioning roller 264, the driving roller 265 and the guide roller 266; specifically, one end of the conveying belt 21 is tightly wound from the upper side of the guide roller 266, passes through the lower side of the driving roller 265, and is wound from the upper side of the guide roller 266, and the side end plate 261 and the mounting plate 262 are respectively provided with a long hole 263 corresponding to the two ends of the guide roller 266, and the guide roller 266 can slide along the long hole 263 to adjust the tension of the conveying belt; it should be noted that a supporting spring (not shown in the figure) supporting the end shaft of the guide roller 266 is arranged in the long hole, and a similar structure can also be used to achieve the function, which will not be described here.

[0087] As shown in Figure 9 A driving motor 268 is arranged on the mounting plate 262, and two power wheels 2610 are arranged at the shaft end of the driving motor 268, the power wheels 2610 are respectively drivingly connected with a first transmission wheel 15 arranged at the shaft end of the power shaft 161 and a second transmission wheel 267 arranged at the shaft end of the driving roller 265 through transmission belts, that is, the synchronous driving of the conveying belt and the cutting mechanism can be realized by the driving motor 268, and the cutting length and cutting speed of the graphite workpiece can be controlled by designing the transmission ratio of the first transmission wheel and the second transmission wheel.

[0088] As shown in Figure 10As shown, the mounting plate 262 is provided with a tensioning mechanism 269 corresponding to the drive belt of the cutting mechanism 16, which can adjust the tension of the corresponding drive belt in cooperation with the lifting adjustment of the cutting mechanism 16. The tensioning mechanism 269 includes a fixed seat 2691, which is provided with a plurality of arc-shaped long holes 26911 along its circumference and a fixing bolt 26912 arranged in the arc-shaped long hole 26911. The fixed seat 2691 is provided with a mounting slot 26914 corresponding to both ends of the arc-shaped long hole 26911 on the side wall, and a limiting screw 26913 is threadedly connected to the mounting slot 26914. The two limiting screws 26913 cooperate to lock the corresponding fixing bolt 26912. Specifically, loosening the limiting screw 26913 releases the restriction on the corresponding fixing bolt 26912, and the rotation adjustment of the fixed seat 2691 can be realized through the cooperation of the arc-shaped long hole 26911 and the fixing bolt 26912, so as to satisfy the adjustment of the position of the fixed seat. When the fixed seat is rotated in place, the limiting screw 26913 is tightened to fix the fixing bolt and prevent the fixed seat 2691 from rotating along the fixing bolt in the circumferential direction. The fixed seat 2691 is fixedly provided with a support column 2692 and a column sleeve 2693 rotatably sleeved on the support column 2692. A coil spring is arranged between the column sleeve 2693 and the support column 2692. The column sleeve 2693 is fixedly provided with a support arm 2694 on one side, and the support arm 2694 is provided with a support shaft 2695 and an adjusting roller 2696 rotatably sleeved on the support shaft. When the cutting mechanism 16 is cooperated with the drive belt to be correspondingly tightened on the adjusting roller, the pressure on the adjusting roller changes when the cutting mechanism 16 is adjusted, which in turn acts on the support arm 2694 and drives the column sleeve 2693 to rotate along the support column 2692 against the resistance of the coil spring, so as to realize the tension adjustment of the drive belt.

[0089] The above is the preferred embodiment of the present application. It should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A method for processing graphite workpieces, characterized in that, Includes the following steps: Step S1: Place the graphite raw material in a crusher for crushing, and then perform high-energy ball milling to obtain nano-sized graphite powder; The specific steps of high-energy ball milling are as follows: Step S 11 Dry and weigh the graphite blocks, add them to the ball mill jar, and add cemented carbide grinding balls at a ball-to-material ratio of 1~5:1; evacuate the ball mill jar and then fill it with argon or nitrogen gas, repeating this process 1~3 times to ensure that the ball milling process is in a vacuum state. Step S 12 The ball mill jar is placed on a ball mill and subjected to low-speed, low-energy ball milling by intermittent forward and reverse rotation; the ball milling is performed for 5 to 10 minutes, followed by a 5-minute interval, and then alternating forward and reverse rotation. The rotation speed of the ball mill is 150 to 250 r / min, and the ball milling time is 1 to 3 hours. Step S 13 The ball mill jar is placed on the ball mill and high-energy ball milling is carried out in an intermittent forward and reverse alternating rotation mode; the ball milling is performed for 20~60 minutes, with a 15-minute interval, and then the forward and reverse alternating ball milling is performed. The rotation speed of the ball mill is 400~600 r / min, and the ball milling time is 1~3 hours. Step S 14 Nanoscale graphite powder was obtained by placing the ball mill jar in a vacuum drying oven at 50~80℃ and letting it stand in an inert gas atmosphere for 2~4 hours. Step S2: Place the binder and nano-scale graphite powder in a stirring device according to a mass ratio of (0.1~0.4):1, and mix at a speed of 150~200 r / min for 30~60 min until the graphite powder becomes a viscous slurry. Place the viscous slurry in a processing mold and sinter it in a sintering furnace to obtain a graphite blank. Step S3: The graphite blank is conveyed to the cutting device for shaping and cutting to obtain a graphite workpiece of the required size; wherein, the cutting device (100) includes a conveying mechanism (2) and a cutting mechanism (1) installed on the conveying mechanism (2). The conveying mechanism (2) includes a conveyor frame (22) and drive rollers (24) rotatably connected to both ends of the conveyor frame (22). The drive rollers (24) have multiple belt grooves (241) distributed along their axial direction. A conveyor belt (21) is tensioned between the corresponding belt grooves (241) of two drive rollers (24). A cutting slit (211) is formed between two adjacent conveyor belts (21). The cutting mechanism (1) includes a support side plate (11) fixedly connected to both sides of the conveyor frame (22) and a cutting mechanism (16) rotatably arranged between the support side plates (11). The cutting mechanism (16) includes a power shaft (161), multiple cutting blades (162) evenly spaced on the power shaft (161), and cutting blades (163) spaced apart from the cutting blades. The cutting blades (162) are arranged corresponding to the cutting seam (211) and cut along the length direction of the graphite workpiece. The cutting blades (163) cut along the width of the graphite workpiece. The cutting blades (163) include a cutting blade holder (1631). The cutting blade holder (1631) includes a frame (16311) and multiple connecting tooth seats (16312) distributed along its circumference. At least one connecting tooth seat (16312) is fixedly connected with a cutting blade (1632).

2. The method for processing graphite workpieces according to claim 1, characterized in that, In step S2, the sintering temperature is 600~750℃, the sintering pressure is 10~15MPa, the holding time is 30~60min, the heating rate is 10~30℃ / min, and the vacuum degree is 1×10⁻⁶. -3 Pa.

3. The method for processing graphite workpieces according to claim 1, characterized in that, The adhesive is a viscous solution formed by uniformly mixing a viscous material and a solvent in a ratio of (0.1~0.5):

1. The adhesive material is one or a combination of phenolic resin, epoxy resin, furan resin, urea-formaldehyde resin, polyamide, acrylic resin, polyethylene, polypropylene, polystyrene, and asphalt. The solvent is one or a combination of methanol, ethanol, propanol, ethylene glycol, propylene glycol, methyl ketone, acetone, benzene, or toluene.

4. The method for processing graphite workpieces according to claim 1, characterized in that, The support side plate (11) is provided with a guide groove (111). A bearing seat (12) for mounting the power shaft (161) is slidably connected in the guide groove (111). A drive cylinder (13) is provided at the top of the support side plate (11) and corresponding to the guide groove (111). The lower end of the piston rod of the drive cylinder (13) is fixedly connected to the bearing seat (12). The drive cylinder (13) drives the cutting mechanism (16) to move up and down along the guide groove (111).

5. The method for processing graphite workpieces according to claim 4, characterized in that, The conveyor frame (22) is provided with a drive mechanism (26). The drive mechanism (26) includes a side end plate (261) and a mounting plate (262) that are fixedly connected to the two side support beams (23) of the conveyor frame respectively. The side end plate (261) and the mounting plate (262) are rotatably connected in a triangle with a tension roller (264), a drive roller (265) and a guide roller (266). Multiple conveyor belts (21) are wound side by side on the tension roller (264), the drive roller (265) and the guide roller (266). The mounting plate (262) is provided with a drive motor (268), and the shaft end of the drive motor (268) is provided with two power wheels (2610). The power wheels (2610) are respectively connected to the first transmission wheel (15) provided at the shaft end of the power shaft (161) and the second transmission wheel (267) provided at the shaft end of the drive roller (265) via transmission belts.

6. The method for processing graphite workpieces according to claim 5, characterized in that, The mounting plate (262) is provided with a tensioning mechanism (269) on one side, which corresponds to the transmission belt of the drive cutting mechanism (16). The tensioning mechanism (269) includes a fixed seat (2691), a support column (2692) and a column sleeve (2693) rotatably mounted on the support column (2692) are fixedly mounted on the fixed seat (2691), and a coil spring is provided between the column sleeve (2693) and the support column (2692). A support arm (2694) is fixedly mounted on one side of the column sleeve (2693), and a support shaft (2695) and an adjusting roller (2696) rotatably mounted on the support shaft are provided at the end of the support arm (2694).

7. The method for processing graphite workpieces according to claim 6, characterized in that, The fixing base (2691) has multiple arc-shaped elongated holes (26911) and fixing bolts (26912) disposed in the arc-shaped elongated holes (26911) along its circumference. The side wall of the fixing base (2691) is provided with mounting slots (26914) corresponding to the two ends of one of the arc-shaped elongated holes (26911). Limiting screws (26913) are threadedly connected to the mounting slots (26914). The two limiting screws (26913) can lock the corresponding fixing bolts (26912) by cooperating.

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