Machining device for rough and fine grinding of graphite mold

Abstract

The utility model discloses a processing device for rough and fine grinding of a graphite mould, which comprises a machine table body and a graphite mould workpiece, a table type grinding wheel mechanism is fixedly arranged at the rear part of the machine table body, and a grinding wheel disc of the table type grinding wheel mechanism is exposed out of the top surface of the machine table body and is vertically arranged along the transverse direction; sliding rail mechanisms are installed on the two sides of the machine table body correspondingly. The machining device has the beneficial effects that the distance between a stud and the bottom of a positioning hole can be adjusted in a positive and negative rotation mode of the stud of the machining limiting assembly, so that the distance is consistent with the machining amount of a graphite mold, and then in the process that the main baffle is pushed to drive a graphite mold workpiece to be accurately ground by a table type grinding wheel mechanism; the accurate grinding machining amount of the graphite die workpiece can be accurately controlled in the mode that the bottom of the positioning hole abuts against the end of the stud in a contact mode, the situation that accurate grinding machining of the graphite die workpiece is excessive is avoided, the machining quality of the graphite die workpiece is guaranteed, and waste of materials is prevented.

Description

Technical Field

[0001] The utility model relates to the field of graphite die processing auxiliary components, in particular to a processing device for rough and fine grinding of graphite dies. Background Art

[0002] Graphite molds are an indispensable raw material for the production of diamond tool bits by hot pressing and sintering. The following performance requirements are imposed on them: 1. Good thermal conductivity, that is, it needs to be able to quickly complete heat transfer so that the metal powder in the mold is heated evenly; 2. It must be able to maintain sufficiently high mechanical strength at high temperatures and not react with the metal powder in a short period of time, ensuring that the metal powder is sintered under a certain pressure to achieve the densification of the tool bit; 3. A very small thermal expansion coefficient to ensure that the size does not change substantially at high temperatures, thereby ensuring the dimensional accuracy of the final product.

[0003] Usually, when hot pressing and sintering graphite molds, the temperature range of hot pressing and sintering is 700-950℃, the molding pressure range is 12-18MPa, the heat preservation and pressure holding time is 20-30min, and the working environment is mostly a normal atmospheric environment. As an essential mold for the production of diamond tools, the material and size of the graphite mold play a very important role in the quality of the cutter head. At present, in the actual production process, oxidation at high temperature, "erosion" and adhesion of metal powder at high temperature, and the later demolding process will cause loss to the graphite mold, which will inevitably deteriorate the accuracy of the graphite mold, thereby directly affecting the quality of the tool product. Therefore, in the production of diamond cutter heads, the consumption of graphite molds is also one of the main manufacturing costs of diamond tools.

[0004] Existing graphite molds are usually composed of end plates, side plates, concave and convex partitions, edge strips and pressure heads, and are mostly in regular plate or strip shapes for easy processing and molding. During the processing, the finishing processing of the surfaces of various parts is usually achieved by fine grinding with various grinding wheels. However, when fine grinding the graphite mold on a desktop grinding wheel device, it is difficult to control the repetitive processing accuracy of the graphite mold. That is, during the processing, when another graphite mold is replaced for fine grinding after a single fine grinding is completed, it is often necessary to perform secondary debugging of the desktop grinding wheel equipment before the repetitive processing accuracy of the graphite mold can be well controlled, resulting in low efficiency during repeated processing. At the same time, during the fine grinding process, due to the lack of limit control on the fine grinding amount, excessive fine grinding is prone to occur during fine grinding, resulting in poor processing quality of the graphite mold and waste of materials. Utility Model Content

[0005] The purpose of the utility model is to provide a processing device for rough and fine grinding of graphite molds in order to solve the above-mentioned problems. By processing the stud of the limit assembly in the forward and reverse directions, the distance between the stud and the bottom of the positioning hole can be adjusted to be consistent with the processing amount of the graphite mold. Then, in the process of pushing the main baffle to drive the graphite mold workpiece to be fine-ground by the desktop grinding wheel mechanism, the bottom of the positioning hole contacts the end of the stud, so that the fine grinding amount of the graphite mold workpiece can be accurately controlled, thereby avoiding the situation of excessive fine grinding of the graphite mold workpiece. See the following description for details.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a processing device for rough and fine grinding of graphite molds, comprising a machine body and a graphite mold workpiece, wherein a table grinding wheel mechanism is fixedly installed at the rear of the machine body, and the grinding wheel disc of the table grinding wheel mechanism is exposed from the top surface of the machine body and is arranged vertically in the horizontal direction;

[0008] Slide rail mechanisms are installed on both sides of the machine body, and a main baffle is slidably connected between the slide rail mechanisms on both sides, so that the main baffle can be reciprocated forward and backward through the slide rail mechanisms;

[0009] The main baffle is located in front of the grinding wheel, and a boss is fixedly installed on the back of the main baffle at a position facing the grinding wheel. A workpiece central fixing component capable of clamping graphite mold workpieces of different specifications is installed on the back of the boss, and the fine grinding surface of the graphite mold workpiece faces the grinding wheel and is parallel to each other;

[0010] A machining limit assembly for quantitatively controlling the amount of fine grinding of the graphite mold workpiece is installed on the top surface of the machine body beside the grinding wheel, and the machining limit assembly is located behind the main baffle.

[0011] Preferably, the grinding wheel of the table grinding wheel mechanism rotates in a clockwise direction, and a handle for holding and applying force is fixedly installed in the middle of the front of the main baffle.

[0012] Preferably, an air suction pipe mechanism for sucking and cleaning graphite powder produced by grinding is provided longitudinally extending above the machine body, and a pipe joint for convenient connection with an external pipeline is coaxially fixed to the rear end of the air suction pipe mechanism.

[0013] Preferably, the front end of the suction pipe mechanism is an elbow and the end extends horizontally to a position close to the graphite mold workpiece, and the pipe joint is a quick joint.

[0014] Preferably, the workpiece clamping assembly includes a U-shaped seat and a cylinder body, the U-shaped seat is fixed to the back side of the boss, the cylinder bodies are laterally fixed to the outside of both sides of the U-shaped seat, the ends of the cylinder bodies at both sides that are close to each other are laterally connected with push rods that can reciprocate laterally, the push rods pass through the sides of the U-shaped seat in a transverse sliding fit and the ends are extended and fixed with pressure plates, the pressure plates at both sides are respectively pressed on the two side surfaces of the graphite mold workpiece, so as to clamp and fix the graphite mold workpiece to the U-shaped seat with the fine grinding surface facing the grinding wheel.

[0015] Preferably, the U-shaped bottom surface of the U-shaped seat is fixedly connected to the back surface of the boss, and the U-shaped opening of the U-shaped seat is located close to the grinding wheel.

[0016] Preferably, the machining limit assembly includes a secondary baffle and a stud, the secondary baffle is located behind the main baffle and the two are parallel, the secondary baffle is fixed to the top surface of the machine body and is located beside the grinding wheel, the secondary baffle is longitudinally interspersed with multiple studs with different thread pitches in a threaded engagement manner, and the outer periphery of the studs that pass through the front and rear end surfaces of the secondary baffle are coaxially engaged with limit nuts.

[0017] Preferably, a limiting plate is fixed to the back of the main baffle plate through a connecting plate at a position facing the auxiliary baffle, and a plurality of positioning holes are longitudinally provided on the end face of the limiting plate facing the auxiliary baffle, and the positioning holes are all blind holes, and the positioning holes are coaxially aligned with the studs one by one and can be longitudinally coaxially slidably matched.

[0018] Preferably, the front of the limit plate contacts the back of the main baffle, connecting plates are extended and fixed on both sides of the limit plate, and the connecting plates are fixed on the back of the main baffle by longitudinally inserting screws.

[0019] Preferably, the number of the studs is three and the pitch of the thread decreases successively in the direction approaching the grinding wheel. The rear ends of the studs are coaxially provided with ends for easy holding, and the limit nuts are hand-tightened knurled nuts.

[0020] The above-mentioned processing device for rough and fine grinding of graphite molds is used. Specifically, in the process of fine grinding of the graphite mold workpiece, the size of the graphite mold workpiece to be processed is first measured by a vernier caliper to determine the approximate processing amount required for grinding, and then the side of the graphite mold workpiece to be processed with poor flatness is selected as the processing surface, and then the graphite mold workpiece is fixed to the back of the boss through the workpiece clamping assembly. When fixing, the cylinder body is first connected to the external air supply pipeline, and then the cylinder body is expanded by the push rod inward to expand the distance between the two pressing plates, and then the graphite mold workpiece is placed between the pressing plates at both sides and the processing surface is facing the grinding wheel, and then the two sides are fixed. The cylinder bodies are all driven by the push rod to extend outward to press the pressure plates against the surface of the graphite mold workpiece, so as to clamp and fix the graphite mold workpiece, then push the handle to make the graphite mold workpiece contact with the surface of the grinding wheel and keep the main baffle plate motionless, the grinding wheel should be in a power-off and static state at this time, at the same time, turn the limit nuts corresponding to the same stud away from each other, and then hold the end heads respectively to drive the studs to reverse counterclockwise to increase the distance between the front end and the positioning hole in turn, then select the stud with the thickest thread pitch and hold the end heads to rotate clockwise to reduce the distance between the front end and the positioning hole until the front end of the stud is in contact with the positioning hole. The bottom of the hole is in close contact, and finally the stud is slowly reversed counterclockwise again to adjust the distance between the front end of the stud and the bottom of the positioning hole to 70-80% of the fine grinding amount. The distance can be controlled by referring to the change in the distance between the limit nut and the auxiliary baffle plate during adjustment. When adjusted in place, the stud is kept from rotating and the two limit nuts are pressed against the surface of the auxiliary baffle plate in turn to lock the stud from loosening naturally. Then the grinding wheel of the bench grinding wheel mechanism can be rotated, and the processing surface of the graphite mold workpiece is driven to contact the grinding wheel disc and feed longitudinally for grinding by pushing the main baffle plate to slide longitudinally along the slide rail mechanism until the bottom of the positioning hole and the front end of the stud are in contact with each other. The rough machining of the machining surface of the graphite mold workpiece is then completed, and then the baffle can be moved away from the grinding wheel disc, removed and replaced with a new graphite mold workpiece, and the rough machining of the machining surface can be performed again. In this way, the rough machining of the graphite mold workpieces of the same batch can be repeated. During the batch machining process, the machining size can be randomly checked with the help of a vernier caliper. After the rough machining of a single machining surface of the graphite mold workpieces of the same batch is completed, the grinding wheel disc is powered off again, and the machined surface of the graphite mold workpiece is selected as the reference surface. The graphite mold workpiece is fixed to the rear of the boss through the workpiece clamping assembly again, and the grinding wheel disc of another machining surface is contacted with each other according to the above operation method to perform rough machining of the other machining surface. After the rough machining of the machining surface is completed,According to the above operation method, the distance between the front end of the stud with fine thread pitch and the bottom of the corresponding positioning hole is adjusted to the remaining processing amount and locked, and then the grinding wheel is rotated again to perform fine grinding of the processing surface of the same batch of graphite mold workpieces in turn according to the above operation method, so that the distance between the stud and the bottom of the positioning hole and the processing amount of the graphite mold workpiece can be adjusted to be consistent through the forward and reverse rotation of the stud of the processing limit assembly, and then in the process of pushing the main baffle to drive the graphite mold workpiece to be finely ground by the bench grinding wheel mechanism, the bottom of the positioning hole contacts the end of the stud, so that the fine grinding processing amount of the graphite mold workpiece can be accurately controlled, thereby avoiding the situation of excessive fine grinding of the graphite mold workpiece, which is beneficial to ensuring the processing quality of the graphite mold workpiece and preventing material waste. At the same time, the distance between the stud and the bottom of the positioning hole and the processing amount of the graphite mold workpiece are kept consistent. By tightening the limit nut and pressing it against the auxiliary baffle, the distance between the stud and the bottom of the positioning hole can be locked so as not to change. Then, when another graphite mold workpiece is replaced after the fine grinding of the graphite mold workpiece, the same amount of fine grinding can be repeated on the graphite mold workpiece without secondary debugging, thereby achieving good control of batch processing of the graphite mold workpiece and repeated processing accuracy of the graphite mold workpiece, which is beneficial to improving the fine grinding efficiency. In addition, since the auxiliary baffle is meshed and interspersed with multiple studs with different thread pitches, and since the number of turns of the fine-threaded studs required to be twisted is more at the same distance, higher precision control can be obtained during the twisting process. Then, by using the studs with different thread pitches to adjust the processing amount, the fine grinding accuracy of the graphite mold workpiece can be controlled, which not only avoids the situation of excessive fine grinding, but also achieves high-precision fine grinding of the graphite mold workpiece.

[0021] The beneficial effects are as follows: 1. The utility model can adjust the distance between the stud and the bottom of the positioning hole to be consistent with the processing amount of the graphite mold by processing the stud of the limit assembly in a positive and negative direction, and then in the process of pushing the main baffle to drive the graphite mold workpiece to be finely ground by the bench-type grinding wheel mechanism, the bottom of the positioning hole contacts the end of the stud, and the fine grinding amount of the graphite mold workpiece can be accurately controlled, thereby avoiding the situation of excessive fine grinding of the graphite mold workpiece, which is beneficial to ensuring the processing quality of the graphite mold workpiece and preventing material waste;

[0022] 2. After adjusting the distance between the stud and the bottom of the positioning hole to be consistent with the processing amount of the graphite mold, the distance between the stud and the bottom of the positioning hole can be locked by tightening the limit nut and pressing it on the auxiliary baffle plate. Then, when another graphite mold workpiece is replaced after the fine grinding of the graphite mold workpiece, the same processing amount of fine grinding can be repeated without secondary debugging, which realizes the batch processing of graphite mold workpieces and the good control of the repeated processing accuracy of graphite mold workpieces, which is conducive to improving the fine grinding efficiency;

[0023] 3. The auxiliary baffle is meshed with multiple studs with different thread pitches. Because the studs with fine threads need to be screwed more times at the same distance, higher precision control can be obtained during the screwing process. Then, by using studs with different thread pitches to adjust the processing amount, the precision of the fine grinding of the graphite mold workpiece can be controlled, which not only avoids excessive fine grinding, but also realizes high-precision fine grinding of the graphite mold workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is the overall axonometric diagram of the utility model. Figure 1 ;

[0026] Figure 2 This utility model Figure 1 A local enlarged view of point A;

[0027] Figure 3 This is the overall axonometric diagram of the utility model. Figure 2 ;

[0028] Figure 4 This utility model Figure 3 A partial enlarged view of point B;

[0029] Figure 5 This utility model Figure 1 Schematic cross-section diagram;

[0030] Figure 6 This utility model Figure 5 A partial enlarged view of point C;

[0031] Figure 7 This utility model Figure 3 Schematic cross-section diagram;

[0032] Figure 8 This utility model Figure 7 A partial enlarged view of point D;

[0033] Fig. 9 This utility model Figure 1 The front view of the external image;

[0034] Fig.10 This utility model Figure 1 The left external view of

[0035] Fig.11 This utility model Figure 1 External view from above.

[0036] The following are the descriptions of the reference numerals:

[0037] 1. Processing limit assembly; 101. Stud; 102. Auxiliary baffle; 103. End; 104. Limit nut; 105. Connecting plate; 106. Limit plate; 107. Positioning hole; 2. Bench grinding wheel mechanism; 201. Grinding wheel; 3. Suction pipe mechanism; 301. Pipe joint; 4. Slide rail mechanism; 5. Main baffle; 501. Handle; 6. Machine body; 7. Boss; 8. Workpiece clamping assembly; 801. Cylinder body; 802. U-shaped seat; 803. Push rod; 804. Press plate; 9. Graphite mold workpiece. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0039] See also Figure 1-Figure 11 As shown, the utility model provides a processing device for rough and fine grinding of graphite molds, including a machine body 6 and a graphite mold workpiece 9, a table grinding wheel mechanism 2 is fixedly installed on the rear of the machine body 6, and the grinding wheel disc 201 of the table grinding wheel mechanism 2 is exposed from the top surface of the machine body 6 and is vertically arranged in the horizontal direction, and at the same time, slide rail mechanisms 4 are installed on both sides of the machine body 6, and main baffles 5 are slidably connected between the slide rail mechanisms 4 on both sides, so that the main baffles 5 can be reciprocated back and forth through the slide rail mechanism 4. The purpose of such a setting is that the slide rail mechanism 4 can smoothly drive the main baffle 5 to reciprocate longitudinally, and then the main baffle 5 can drive the graphite mold workpiece 9 to move longitudinally for feed grinding.

[0040] See also Figure 1-Figure 4As shown, the main baffle 5 is located in front of the grinding wheel 201, and a boss 7 is fixedly installed on the back of the main baffle 5 at a position facing the grinding wheel 201. A workpiece clamping assembly 8 capable of clamping graphite mold workpieces 9 of different specifications is installed on the back of the boss 7, and the fine grinding surface of the graphite mold workpiece 9 faces the grinding wheel 201 and is parallel to each other. Specifically, the workpiece clamping assembly 8 includes a U-shaped seat 802 and a cylinder body 801. The U-shaped seat 802 is fixed on the back of the boss 7. The cylinder bodies 801 are fixed to the outside of both sides of the U-shaped seat 802 in the transverse direction. The ends of the cylinder bodies 801 at the two sides are close to each other and are connected in the transverse direction with push rods 803 that can reciprocate and extend in the transverse direction. The push rods 803 are in the form of transverse sliding fit. The U-shaped seat 802 passes through the side and the ends are extended and fixed with pressure plates 804, and the pressure plates 804 on both sides are respectively pressed on the two side surfaces of the graphite mold workpiece 9 to clamp the graphite mold workpiece 9 on the U-shaped seat 802 with the fine grinding surface facing the grinding wheel 201. The advantage of this arrangement is that the graphite mold workpiece 9 can be quickly clamped and fixed by driving the pressure plates 804 on both sides to approach each other by the push rod 803, and the fixed graphite mold workpiece 9 can be quickly loosened and removed by driving the pressure plates 804 on both sides to move away from each other by the push rod 803. Moreover, since the distance between the pressure plates 804 on both sides is adjustable, it can adapt to the clamping of graphite mold workpieces 9 of different specifications and sizes.

[0041] See also Figure 1-Figure 8As shown, a machining limit assembly 1 for quantitatively controlling the amount of fine grinding of the graphite mold workpiece 9 is installed on the top surface of the machine body 6 at a position beside the grinding wheel 201, and the machining limit assembly 1 is located at the rear of the main baffle 5. Specifically, the machining limit assembly 1 includes an auxiliary baffle 102 and a stud 101. The auxiliary baffle 102 is located at the rear of the main baffle 5 and the two are parallel. The auxiliary baffle 102 is fixed to the top surface of the machine body 6 and is located beside the grinding wheel 201. The auxiliary baffle 102 is longitudinally interspersed with multiple studs 101 with different thread pitches in a threaded engagement manner, and the studs 101 that pass through the front and rear end surfaces of the auxiliary baffle 102 are coaxially engaged with the limit nut 104. This arrangement facilitates the adjustment of the distance between the stud 101 and the bottom of the positioning hole 107 and the machining of the graphite mold by reversing the stud 101. The amount is kept consistent, and then the amount of fine grinding of the graphite mold workpiece 9 can be accurately controlled by the way that the bottom of the positioning hole 107 contacts and presses against the end of the stud 101, thereby avoiding the situation of excessive fine grinding of the graphite mold workpiece 9. At the same time, after adjusting the distance between the stud 101 and the bottom of the positioning hole 107 to be consistent with the processing amount of the graphite mold, the distance between the stud 101 and the bottom of the positioning hole 107 can be locked by tightening the limit nut 104 and pressing it on the auxiliary baffle 102. The graphite mold workpiece 9 can be repeatedly fine-ground with the same processing amount without secondary debugging, and because the auxiliary baffle 102 is meshed and interspersed with multiple studs 101 with different thread pitches, the precision of the fine grinding of the graphite mold workpiece 9 can be controlled by adjusting the processing amount using studs 101 with different thread pitches.

[0042] See also Figure 1-Figure 4 As shown, the table grinding wheel mechanism 2, the main baffle plate 5 and the machine body 6 are respectively optimized as follows. Specifically, in the table grinding wheel mechanism 2 and the main baffle plate 5, the grinding wheel disc 201 of the table grinding wheel mechanism 2 rotates in a clockwise direction so that the rotation direction of the grinding wheel disc 201 can send the ground graphite powder to the position of the suction pipe mechanism 3, and then it can be absorbed by the suction pipe mechanism 3. At the same time, a handle 501 for holding and applying force is fixedly installed in the middle of the front of the main baffle plate 5. This arrangement makes it easy to drive the main baffle plate 5 to move closer and farther along the slide rail mechanism 4 by holding the handle 501 and applying force.

[0043] Specifically, on the machine body 6, an air suction pipe mechanism 3 is provided on the upper side of the machine body 6 along the longitudinal extension to suck and clean the graphite powder generated by grinding, and a pipe joint 301 is coaxially fixed at the rear end of the air suction pipe mechanism 3 to facilitate connection with external pipelines. The advantage of such a setting is that the graphite powder produced by grinding can be promptly sucked away through the air suction pipe mechanism 3, thereby preventing dust pollution and ensuring the health of the workers to the greatest extent. At the same time, the front end of the air suction pipe mechanism 3 is an elbow and the end extends horizontally to a position close to the graphite mold workpiece 9, and the pipe joint 301 is a quick joint. Such a setting facilitates the end of the air suction pipe mechanism 3 to completely suck and collect the graphite powder as much as possible, and facilitates the air suction pipe mechanism 3 to be quickly connected to the external suction power equipment through the pipe joint 301.

[0044] See also Figure 1-Figure 8 As shown, the workpiece clamping assembly 8 is optimized as follows: the U-shaped bottom surface of the U-shaped seat 802 is fixedly connected to the back side of the boss 7, and the U-shaped opening of the U-shaped seat 802 is located close to the grinding wheel 201. This arrangement allows the U-shaped seat 802 to be firmly and securely fixed to the back side of the boss 7 and facilitates the smooth arrangement of the cylinder body 801.

[0045] See also Figure 5-Figure 8 As shown, the processing limit assembly 1 is optimized as follows. First, a limit plate 106 is fixed to the back of the main baffle 5 at a position facing the auxiliary baffle 102 through a connecting plate 105. A plurality of positioning holes 107 are longitudinally provided on the end face of the limit plate 106 facing the auxiliary baffle 102, and the positioning holes 107 are all blind holes. The positioning holes 107 are coaxially aligned with the studs 101 one by one and can be coaxially slidably matched longitudinally. Such an arrangement facilitates positioning and guiding by coaxially slidingly matching with the front end of the stud 101 by setting the positioning holes 107. At the same time, it is preferred that both the stud 101 and the limit plate 106 are made of wear-resistant alloys, so as to prevent the stud 101 and the limit plate 106 from being worn too quickly by direct contact between the stud 101 and the limit plate 106, which is beneficial to improving the service life and stability of the front end of the stud 101.

[0046] As for the connection between the limit plate 106 and the main baffle 5, the front of the limit plate 106 is in contact with the back of the main baffle 5, and connecting plates 105 are extended and fixed on both sides of the limit plate 106, and the connecting plates 105 are fixed on the back of the main baffle 5 by longitudinally inserting and adding screws. The purpose of this arrangement is to enable the limit plate 106 to be quickly assembled and fixed to the back of the main baffle 5 by adding screws to the connecting plate 105, and the limit plate 106 and the main baffle 5 can be separated from each other by simply removing the screws, thereby facilitating the disassembly and assembly of the limit plate 106 at the rear of the main baffle 5.

[0047] Specifically, among the multiple studs 101, the number of the studs 101 is three and the pitch of the thread decreases successively in the direction approaching the grinding wheel 201, so that the three studs 101 have a certain regularity to follow when they are arranged, which is convenient for personnel to quickly identify and adjust. At the same time, the rear end of the stud 101 is coaxially provided with an end 103 for easy holding, and the limiting nut 104 is a hand-tightened knurled nut, and the end 103 is preferably an external hexagonal shape. Such a configuration makes it convenient to drive the stud 101 to rotate by holding the end 103, and at the same time, it is convenient for the limiting nut 104 to be directly tightened or loosened by applying force by hand.

[0048] With the above structure, specifically in the process of fine grinding of the graphite mold workpiece 9, firstly, the size of the graphite mold workpiece 9 to be processed is measured by a vernier caliper to determine the approximate processing amount required for grinding, and then the side of the graphite mold workpiece 9 to be processed with poor flatness is selected as the processing surface, and then the graphite mold workpiece 9 is fixed to the back of the boss 7 through the workpiece clamping assembly 8. When fixing, the cylinder body 801 is first connected to the external air supply pipeline, and then the cylinder body 801 is expanded by the push rod 803 inwardly expanding the distance between the two pressure plates 804, and then the graphite mold workpiece 9 is placed between the pressure plates 804 at both sides and the processing surface faces the grinding wheel 201, and then the cylinder bodies 801 at both sides are connected by the push rod 8 03 extends outward and drives the pressure plate 804 to be pressed against the surface of the graphite mold workpiece 9, so as to clamp and fix the graphite mold workpiece 9, then push the handle 501 to make the graphite mold workpiece 9 contact with the surface of the grinding wheel 201 and keep the main baffle 5 motionless. The grinding wheel 201 should be in a power-off and static state at this time. At the same time, the limit nuts 104 corresponding to the same stud 101 are turned away from each other, and then the end head 103 is held respectively to drive the stud 101 to reverse counterclockwise to increase the distance between the front end and the positioning hole 107 in turn, and then the stud 101 with the thickest thread pitch is selected and the end head 103 is held and rotated clockwise to reduce the distance between the front end and the positioning hole 107 until the front end of the stud 101 is close to the bottom of the positioning hole 107. The distance between the front end of the stud 101 and the bottom of the positioning hole 107 is adjusted to 70% to 80% of the fine grinding amount. The distance can be controlled by referring to the change in the distance between the limit nut 104 and the auxiliary baffle 102. When the adjustment is in place, the stud 101 is kept from rotating and the two limit nuts 104 are pressed against the surface of the auxiliary baffle 102 in turn to lock the stud 101 from loosening naturally. Then the grinding wheel 201 of the table grinding wheel mechanism 2 can be rotated, and the processing surface of the graphite mold workpiece 9 is driven to contact the grinding wheel 201 and feed longitudinally by pushing the main baffle 5 to slide longitudinally along the slide rail mechanism 4 until the bottom of the positioning hole 107 and the front end of the stud 101 are in contact with each other. After this contact, the rough machining of the machined surface of the graphite mold workpiece 9 is completed immediately, and then the baffle can be moved away from the grinding wheel 201, and then the new graphite mold workpiece 9 can be removed and replaced, and the rough machining of the machined surface can be performed again. In this way, the same batch of graphite mold workpieces 9 can be repeatedly rough-machined. During the batch machining process, the machining size can be randomly checked with the help of a vernier caliper. After the rough machining of a single machined surface of the same batch of graphite mold workpieces 9 is completed, the grinding wheel 201 is powered off again, and the machined surface of the graphite mold workpiece 9 is selected as the reference surface. The graphite mold workpiece 9 is fixed to the rear part of the boss 7 again through the workpiece clamping assembly 8 and the other machined surface is contacted with the grinding wheel 201 according to the above operation method to perform rough machining of the other machined surface. After the rough machining of the machined surface is completed,The distance between the front end of the stud 101 with a fine thread pitch and the bottom of the corresponding positioning hole 107 is adjusted to the remaining processing amount and locked according to the above operation method, and then the grinding wheel disc 201 is rotated again to perform fine grinding of the processing surface of the same batch of graphite mold workpieces 9 in turn according to the above operation method. In this way, the distance between the stud 101 and the bottom of the positioning hole 107 can be adjusted to be consistent with the processing amount of the graphite mold workpiece 9 by reversing the stud 101 of the processing limit assembly 1. Then, in the process of pushing the main baffle plate 5 to drive the graphite mold workpiece 9 to be finely ground by the desktop grinding wheel mechanism 2, the bottom of the positioning hole 107 contacts the end of the stud 101. The fine grinding processing amount of the graphite mold workpiece 9 can be accurately controlled, thereby avoiding the situation of excessive fine grinding of the graphite mold workpiece 9, which is beneficial to ensuring the processing quality of the graphite mold workpiece 9 and preventing material waste. After that, by tightening the limit nut 104 and pressing it against the auxiliary baffle 102, the distance between the locking stud 101 and the bottom of the positioning hole 107 will not change. Then, when another graphite mold workpiece 9 is replaced after the fine grinding of the graphite mold workpiece 9 is completed, the same amount of fine grinding can be repeated on the graphite mold workpiece 9 without secondary debugging, thereby achieving good control of batch processing of the graphite mold workpiece 9 and repeated processing accuracy of the graphite mold workpiece 9, which is conducive to improving the fine grinding efficiency. In addition, since the auxiliary baffle 102 is meshed and interspersed with multiple studs 101 with different thread pitches, and at the same distance, the fine-toothed stud 101 needs to be turned more times, so higher precision control can be obtained during the twisting process. Then, by using studs 101 with different thread pitches to adjust the processing amount, the fine grinding accuracy of the graphite mold workpiece 9 can be controlled, which not only avoids the situation of excessive fine grinding, but also achieves high-precision fine grinding of the graphite mold workpiece 9.

[0049] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A processing device for rough and fine grinding of graphite molds, comprising a machine body (6) and a graphite mold workpiece (9), characterized in that: A table grinding wheel mechanism (2) is fixedly mounted on the rear of the machine body (6), and a grinding wheel disc (201) of the table grinding wheel mechanism (2) is exposed from the top surface of the machine body (6) and is arranged vertically in the horizontal direction; Slide rail mechanisms (4) are installed on both sides of the machine body (6), and a main baffle (5) is slidably connected between the slide rail mechanisms (4) on both sides, so that the main baffle (5) can be reciprocated forward and backward through the slide rail mechanisms (4); The main baffle (5) is located in front of the grinding wheel (201), a boss (7) is fixedly installed on the back of the main baffle (5) at a position facing the grinding wheel (201), a workpiece clamping assembly (8) capable of clamping graphite mold workpieces (9) of different specifications is installed on the back of the boss (7), and the fine grinding processing surface of the graphite mold workpiece (9) faces the grinding wheel (201) and is parallel to each other; A machining limit assembly (1) for quantitatively controlling the amount of fine grinding of the graphite mold workpiece (9) is installed on the top surface of the machine body (6) at a position beside the grinding wheel (201), and the machining limit assembly (1) is located behind the main baffle (5).

2. A processing device for rough and fine grinding of graphite molds according to claim 1, characterized in that: The grinding wheel disc (201) of the table-type grinding wheel mechanism (2) rotates in a clockwise direction, and a handle (501) for holding and applying force is fixedly installed in the middle of the front of the main baffle (5).

3. A processing device for rough and fine grinding of graphite molds according to claim 2, characterized in that: An air suction pipe mechanism (3) is longitudinally extended above the machine body (6) for sucking and cleaning graphite powder generated by grinding, and a pipe joint (301) is coaxially fixed at the rear end of the air suction pipe mechanism (3) for convenient connection with an external pipeline.

4. A processing device for rough and fine grinding of graphite molds according to claim 3, characterized in that: The front end of the air suction pipe mechanism (3) is an elbow and the end extends horizontally to a position close to the graphite mold workpiece (9), and the pipe joint (301) is a quick joint.

5. The processing device for rough and fine grinding of graphite mold according to claim 1, characterized in that: The workpiece clamping assembly (8) comprises a U-shaped seat (802) and a cylinder body (801), wherein the U-shaped seat (802) is fixed on the back side of the boss (7), and the cylinder body (801) is fixed to the outside of both sides of the U-shaped seat (802) in a transverse direction, and the ends of the cylinder bodies (801) at both sides that are close to each other are connected in a transverse direction with push rods (803) that can reciprocate in a transverse direction, and the push rods (803) pass through the side of the U-shaped seat (802) in a transverse sliding manner and the ends are extended and fixed with pressure plates (804), and the pressure plates (804) at both sides are respectively pressed on the two side surfaces of the graphite mold workpiece (9) to clamp and fix the graphite mold workpiece (9) on the U-shaped seat (802) with the fine grinding surface facing the grinding wheel (201).

6. A processing device for rough and fine grinding of graphite molds according to claim 5, characterized in that: The U-shaped bottom surface of the U-shaped seat (802) is fixedly connected to the back surface of the boss (7), and the U-shaped opening of the U-shaped seat (802) is located close to the grinding wheel (201).

7. A processing device for rough and fine grinding of graphite molds according to any one of claims 1 to 6, characterized in that: The machining limit assembly (1) comprises an auxiliary baffle (102) and a stud (101); the auxiliary baffle (102) is located behind the main baffle (5) and the two are parallel; the auxiliary baffle (102) is fixed on the top surface of the machine body (6) and is located beside the grinding wheel (201); the auxiliary baffle (102) is longitudinally interspersed with a plurality of studs (101) with different thread pitches in a threaded engagement manner; and the outer periphery of the studs (101) that pass through the front and rear end surfaces of the auxiliary baffle (102) are coaxially engaged with the limit nut (104).

8. A processing device for rough and fine grinding of graphite molds according to claim 7, characterized in that: A limiting plate (106) is fixed to the back of the main baffle (5) at a position facing the auxiliary baffle (102) through a connecting plate (105); a plurality of positioning holes (107) are longitudinally provided on the end surface of the limiting plate (106) facing the auxiliary baffle (102); and the positioning holes (107) are all blind holes; the positioning holes (107) are coaxially aligned with the studs (101) one by one and can be longitudinally coaxially slidably matched.

9. A processing device for rough and fine grinding of graphite molds according to claim 8, characterized in that: The front of the limiting plate (106) contacts the back of the main baffle (5), and connecting plates (105) are extended and fixed on both sides of the limiting plate (106), and the connecting plates (105) are fixedly mounted on the back of the main baffle (5) by longitudinally inserting screws.

10. A processing device for rough and fine grinding of graphite molds according to claim 8 or 9, characterized in that: The number of the studs (101) is three and the pitch of the thread decreases in the direction approaching the grinding wheel (201). The rear ends of the studs (101) are coaxially provided with end heads (103) for easy holding. The limiting nuts (104) are all hand-tightened knurled nuts.

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