Forming die capable of manufacturing polishing and grinding plates of different sizes and surface shapes

Abstract

The forming die capable of being used for manufacturing polishing and grinding plates with different sizes and surface shapes of the application comprises a cavity, a permanent magnetic chuck and a forming assembly; the cavity is used for filling and pressing powder, and comprises an arc-shaped main body, an expansion piece, an adjusting piece and an expansion lifting plate; the adjusting piece is used for controlling the expansion and contraction of the expansion piece to change the inner diameter of the cavity; the expansion lifting plate is used for moving upward to increase the height of the cavity when filling the powder, so as to facilitate filling more powder; the forming assembly comprises a plurality of hinges and a plurality of connecting pieces which are used in combination; in use, the hinges and the connecting pieces can be spliced and combined into forming assemblies with different shapes, so that the surface shape meeting the design requirements can be formed on the polishing and grinding plate; the permanent magnetic chuck is used for adsorbing the forming assembly and pressing the powder in the cavity. The forming die of the application can press the polishing and grinding plates with different sizes as required, has good versatility, and can also form the required surface shape on the surface directly when the polishing and grinding plate is pressed and formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the production technology field of polishing and grinding disc, in particular to a forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes. BACKGROUND

[0002] In recent years, high-precision high-surface-quality components are widely used in the fields of national defense, aerospace and semiconductors. The final processing method of these components is to grind and polish them by polishing and grinding discs to achieve high precision and high surface quality. The common manufacturing method of polishing and grinding discs is to mix the required material powder in a certain proportion, pour it into the die, and then cold / hot press the dispersed powder in the die into a disc by a press machine. The powder pressing process includes powder loading, pressing and demolding. When pressing, a certain amount of binder is usually added to the powder to improve the bonding strength of the powder in the pressed polishing and grinding disc. However, the binder is easy to cause the polishing and grinding disc to adhere to the contact surface of the die during pressing, making it difficult to demold and easily causing damage to the surface of the polishing and grinding disc. The demolding yield is low. If the polishing and grinding disc surface requires a certain structure, it needs to be processed again after demolding, that is, a certain structure is made on the surface of the polishing and grinding disc by milling or engraving, etc., to improve the processing efficiency and chip removal. However, the milling tool is easily worn out during the processing of the surface structure of the polishing and grinding disc, which is difficult to process and has low efficiency. In addition, the size of the existing pressing die is usually fixed, and one die can only press one size of polishing and grinding disc product, which has poor versatility. If other sizes of products are to be pressed, a new die needs to be designed and manufactured, which is time-consuming and laborious and has high production cost. SUMMARY

[0003] The present application provides a forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes to overcome the above-mentioned problems in the prior art. The forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes of the present application includes a cavity, a permanent magnet chuck and a forming assembly, which can press different sizes of polishing and grinding discs according to needs, has good versatility, and can form a surface shape that meets the design requirements on the surface of the polishing and grinding disc during pressing and forming, thus simplifying the processing procedure and improving the processing efficiency. In use, the cavity is fixed on the workbench of the press machine, the permanent magnet chuck is fixed on the top of the press machine, the forming assembly is adsorbed on the surface of the permanent magnet chuck, and the powder is filled in the cavity; the press machine drives the permanent magnet chuck to press down to press the powder in the cavity.

[0004] The technical scheme of the present application is: a forming die capable of being used for manufacturing grinding and polishing discs of different sizes and surface shapes, comprising a cavity, a permanent magnet chuck and a forming assembly; the cavity comprises a plurality of arc-shaped bodies which are connected in sequence to form a ring and are used for filling the material powder required for pressing the grinding and polishing disc; two adjacent arc-shaped bodies are connected through an expansion and contraction member; the expansion and contraction member is matched with an adjusting member and is controlled by the adjusting member to expand and contract, so as to adjust the distance between the two adjacent arc-shaped bodies and change the inner diameter of the cavity; an expansion and lifting plate is arranged on the inner side of each arc-shaped body; the expansion and lifting plate is arc-shaped and is arranged in sequence to form a ring; the expansion and lifting plate is movable up and down relative to the arc-shaped body; the permanent magnet chuck is used for adsorbing the forming assembly and simultaneously pressing the powder filled in the cavity; the forming assembly comprises a plurality of hinges and a plurality of connecting members which are used in combination; the connecting member is used for connecting two adjacent hinges; in use, the hinges and the connecting members can be combined into forming assemblies of different shapes, so that the surface shape meeting the design requirements can be formed on the grinding and polishing disc.

[0005] Compared with the prior art, the forming die capable of being used for manufacturing grinding and polishing discs of different sizes and surface shapes has reasonable structure design, can press grinding and polishing discs of different sizes according to requirements, has good versatility, and can directly form the surface shape meeting the design requirements on the surface of the grinding and polishing disc during the pressing and forming of the grinding and polishing disc, so that the machining process is simple and the machining efficiency is high; the forming die comprises a cavity, a permanent magnet chuck and a forming assembly; in use, the cavity is fixed on the workbench of a press, the permanent magnet chuck is fixed on the top of the press, the forming assembly is adsorbed on the surface of the permanent magnet chuck, and the powder is filled in the cavity; the permanent magnet chuck is driven by the press to press down and press the powder in the cavity. The cavity comprises an expansion and contraction member and an adjusting member; when it is required to press grinding and polishing discs of different radii, the expansion and contraction member can be controlled by the adjusting member to expand and contract, so as to change the inner diameter of the cavity and realize the pressing and forming of grinding and polishing discs of different sizes; the cavity further slidably comprises an expansion and lifting plate; the expansion and lifting plate can move up to increase the height of the cavity and facilitate the filling of more powder when the powder is filled, and the expansion and lifting plate and the surface of the permanent magnet chuck are in contact and slide downward together when the permanent magnet chuck is pressed; the forming assembly is composed of hinges and connecting members; the hinges and the connecting members can be combined into forming assemblies of corresponding shapes according to requirements (first, the angle of the hinge and the connection position of the hinge and the connecting member are adjusted to combine a plurality of splicing members having corresponding shapes, and then the plurality of splicing members are combined together to form the required forming assembly), so that the surface shape meeting the design requirements can be formed on the grinding and polishing disc; and the forming assembly is adsorbed and fixed by the permanent magnet chuck, so that the forming assembly is very convenient to disassemble and assemble.

[0006] As an optimization, the forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes as described above, the arc-shaped body comprises a base block, and an inner arc-shaped plate and an outer arc-shaped plate fixed to the inner and outer sides of the base block; the telescopic member is located between the inner arc-shaped plate and the outer arc-shaped plate, and the two ends are respectively hinged to the two base blocks on the two sides. At this time, the position of the telescopic member is limited between the inner and outer arc-shaped plates, so that the position of the telescopic member can be avoided to deviate during telescoping, thereby affecting the size adjustment of the cavity.

[0007] As an optimization, the forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes as described above, the telescopic member comprises a plurality of telescopic blocks hinged in sequence; a variable-diameter plate is arranged between the telescopic blocks and the inner arc-shaped plate, one end of the variable-diameter plate being fixed to the telescopic block. Further, the adjusting member comprises an adjusting screw and a limiting nut; the outer end of the adjusting screw is fixed to the annular fixing member, the inner end passes through the through hole in the outer arc-shaped plate and is fixed to the arc-shaped pressing plate; the inner side surface of the arc-shaped pressing plate is in contact with the outer side surface of the telescopic block; the limiting nut is located on the outer side of the outer arc-shaped plate. The telescopic member and the adjusting member adopt the above structure, which is convenient to manufacture and easy to assemble; and the adjustment is convenient, only the limiting nut needs to be rotated to drive the arc-shaped body to move outward or inward, thereby controlling the expansion and contraction of the telescopic member and realizing the size increase or decrease of the cavity. Further, the variable-diameter plate can be made of a thin steel plate.

[0008] As an optimization, the forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes as described above, the telescopic member comprises a plurality of telescopic blocks hinged in sequence; a variable-diameter plate is arranged between the telescopic blocks and the inner arc-shaped plate, one end of the variable-diameter plate being fixed to the telescopic block. Further, the adjusting member comprises an adjusting screw and a limiting nut; the outer end of the adjusting screw is fixed to the annular fixing member, the inner end passes through the through hole in the outer arc-shaped plate and is fixed to the arc-shaped pressing plate; the inner side surface of the arc-shaped pressing plate is in contact with the outer side surface of the telescopic block; the limiting nut is located on the outer side of the outer arc-shaped plate. The telescopic member and the adjusting member adopt the above structure, which is convenient to manufacture and easy to assemble; and the adjustment is convenient, only the limiting nut needs to be rotated to drive the arc-shaped body to move outward or inward, thereby controlling the expansion and contraction of the telescopic member and realizing the size increase or decrease of the cavity. Further, the variable-diameter plate can be made of a thin steel plate.

[0008] As an optimization, the forming die capable of manufacturing polishing and grinding discs of different sizes and surface shapes as described above, the telescopic member comprises a plurality of telescopic blocks hinged in sequence; a variable-diameter plate is arranged between the telescopic blocks and the inner arc-shaped plate, one end of the variable-diameter plate being fixed to the telescopic block. Further, the adjusting member comprises an adjusting screw and a limiting nut; the outer end of the adjusting screw is fixed to the annular fixing member, the inner end passes through the through hole in the outer arc-shaped plate and is fixed to the arc-shaped pressing plate; the inner side surface of the arc-shaped pressing plate is in contact with the outer side surface of the telescopic block; the limiting nut is located on the outer side of the outer arc-shaped plate. The telescopic member and the adjusting member adopt the above structure, which is convenient to manufacture and easy to assemble; and the adjustment is convenient, only the limiting nut needs to be rotated to drive the arc-shaped body to move outward or inward, thereby controlling the expansion and contraction of the telescopic member and realizing the size increase or decrease of the cavity. Further, the variable-diameter plate can be made of a thin steel plate.

[0009] As an optimization, in the aforementioned forming mold for manufacturing polishing discs of varying sizes and surface shapes, the permanent magnetic chuck comprises a housing; a first magnetic disk and a second magnetic disk are disposed vertically within the housing; the second magnetic disk is fixedly connected to the housing, and the first magnetic disk is rotatable relative to the housing; permanent magnet blocks are mounted correspondingly within the first and second magnetic disks. During magnetization, the opposing permanent magnet blocks within the first and second magnetic disks face each other with the same poles; during demagnetization, the opposing permanent magnet blocks within the first and second magnetic disks face each other with opposite poles. The permanent magnetic chuck comprises two magnetic disks disposed vertically, each containing permanent magnet blocks arranged in a predetermined pattern. During use, the magnetic circuit can be adjusted by adjusting the angle of one of the magnetic disks to alter the magnetic circuit, thereby achieving magnetization and demagnetization of the permanent magnetic chuck and facilitating the attachment and release of the forming assembly. Thus, to remove the forming assembly, the first magnetic disk can be rotated to demagnetize the permanent magnetic chuck, eliminating the need for manual removal of the forming assembly, resulting in enhanced ease of use. Furthermore, a handle is provided on the outer circumference of the first magnetic disk. This handle can be grasped to rotate the first magnetic disk when adjusting its angle, significantly reducing effort. Furthermore, the housing includes a base and a disk cover; a clamping block is provided in the middle of the base, and correspondingly, a clamping slot is provided in the middle of the second disk, and the clamping block is clamped into the clamping slot. In this case, the structure is simple and the assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of a forming die for manufacturing grinding and polishing discs of different sizes and surface shapes according to the present application;

[0011] Figure 2 It is a structural diagram of the permanent magnetic chuck in this application;

[0012] Figure 3 yes Figure 2 Exploded view of the permanent magnetic chuck;

[0013] Figure 4 is a schematic diagram of the bottom structure of the second disk in this application;

[0014] Figure 5 It is a structural diagram of the cavity in this application;

[0015] Figure 6 This is a schematic diagram of the assembly of the arc-shaped main body, telescopic member, adjustment member, and expansion lifting plate in this application;

[0016] Figure 7 It is a structural diagram of the arc-shaped body in this application;

[0017] Figure 8 It is a structural diagram of the hinge and connector in this application;

[0018] Figure 9It is a splicing piece of different shapes made of multiple hinges and connectors;

[0019] Figure 10 is a bottom view of the forming die in this application (the forming component is a large hexagon);

[0020] Figure 11 is a bottom view of the forming die in this application (the forming component is a large quadrilateral);

[0021] Figure 12 is a bottom view of the molding die in this application (the molding component is a small hexagon);

[0022] Figure 13 is a bottom view of the molding die in this application (the molding component is a small quadrilateral);

[0023] Figure 14 It is the distribution diagram of the permanent magnet blocks in the two disks in the magnetization and demagnetization states;

[0024] Figure 15 This is a schematic diagram of the magnetization and demagnetization of the permanent magnetic chuck in this application;

[0025] Figure 16 It is a schematic diagram of the assembly of the forming die and the press in this application;

[0026] Figure 17 yes Figure 16 The state diagram of the forming mold before and after pressing.

[0027] The marks in the accompanying drawings are: 1-cavity, 11-arc-shaped main body, 111-base block, 112-inner arc-shaped plate, 1121-A slide groove, 113-outer arc-shaped plate, 114-gap, 12-telescopic member, 121-telescopic block, 122-pin, 13-adjusting member, 131-adjusting screw, 132-limiting nut, 133-arc-shaped pressure plate, 14-capacity expansion lifting plate, 141-A capacity expansion lifting plate, 142-B capacity expansion lifting plate, 15-torque converter plate, 16-annular fixing member; 2-permanent magnetic suction cup, 21-shell, 211-base, 212-disc cover, 213-block, 214-bolt, 22-first disk, 221-handle, 23-second disk, 231-slot, 24-permanent magnet block; 3-molding assembly, 31-hinge, 32-connecting member; 4-press. DETAILED DESCRIPTION

[0028] The present application is further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present application.

[0029] See also Figures 1 to 8The forming die for manufacturing polishing and grinding disc of different sizes and surface shapes comprises a cavity 1, a permanent magnet chuck 2 and a forming assembly 3. The cavity 1 comprises a plurality of arc-shaped bodies 11 which are connected in sequence to form a ring and are used to fill the material powder required for pressing the polishing and grinding disc. The arc-shaped bodies 11 are connected by a telescopic member 12. The telescopic member 12 is matched with an adjusting member 13 and is expanded or contracted under the control of the adjusting member 13 to adjust the distance between the adjacent arc-shaped bodies 11 and change the inner diameter of the cavity 1. The inner side of each arc-shaped body 11 is provided with an expansion lifting plate 14. The expansion lifting plate 14 is arranged in sequence to form a ring and can move up and down relative to the arc-shaped body 11. The permanent magnet chuck 2 is used to adsorb the forming assembly 3 and press the powder filled in the cavity 1. The forming assembly 3 comprises a plurality of hinges 31 and a plurality of connecting members 32 which are used in pairs. The connecting member 32 is used to connect the adjacent hinges 31. In use, the hinges 31 and the connecting members 32 can be spliced and combined into forming assemblies 3 of different shapes to form the surface shape meeting the design requirements on the polishing and grinding disc.

[0030] Embodiment

[0031] In this embodiment, the arc-shaped body 11 is provided with four.

[0032] In this embodiment, the arc-shaped body 11 comprises a base block 111 and an inner arc-shaped plate 112 and an outer arc-shaped plate 113 which are fixed to the inner and outer sides of the base block 111. The telescopic member 12 is located between the inner arc-shaped plate 112 and the outer arc-shaped plate 113 and is hinged to the two base blocks 111 at two ends. At this time, the position of the telescopic member 12 is limited between the inner and outer arc-shaped plates, so that the position of the telescopic member 12 can be prevented from deviating when it is expanded or contracted, thereby affecting the size adjustment of the cavity 1.

[0033] Referring to Figure 6 and Figure 7In the embodiment, the telescopic part 12 comprises a plurality of telescopic blocks 121 (10 in the embodiment) connected in sequence; two telescopic blocks 121 at the two ends are respectively connected with the base block 111; a variable-diameter plate 15 is arranged between the telescopic block 121 and the inner arc-shaped plate 112; one end of the variable-diameter plate 15 is fixed on the telescopic block 121; the expansion lifting plate 14 and the variable-diameter plate 15 are thin steel plates; the adjusting part 13 comprises an adjusting screw 131 and a limiting nut 132; the outer end of the adjusting screw 131 is fixed on the annular fixing part 16, the inner end passes through the through hole on the outer arc-shaped plate 113 (i.e. the arc-shaped body 11 can move relative to the adjusting screw 131), and is fixed on the arc-shaped pressing plate 133; the inner side surface of the arc-shaped pressing plate 133 is in contact with the outer end of the telescopic block 121; the limiting nut 132 is located on the outer side of the outer arc-shaped plate 113; the expansion lifting plate 14 comprises A expansion lifting plates 141 and B expansion lifting plates 142 arranged alternately; the A expansion lifting plate 141 is inserted into the A sliding groove 1121 on the inner arc-shaped plate 112; the B expansion lifting plate 142 is inserted into the B sliding groove 151 on the variable-diameter plate 15. On the two sides of the base block 111, between the inner arc-shaped plate 112 and the base block 111, a gap 114 is arranged to accommodate the variable-diameter plate 15 when the variable-diameter plate 15 moves. In use, the size of the cavity 1 is adjusted by rotating the limiting nut 132 (when adjusting, the position of the arc-shaped pressing plate 133 is fixed); specifically, the limiting nut 132 is rotated outward, the arc-shaped body 11 moves outward, at this time, the space between the arc-shaped pressing plate 133 and the inner arc-shaped plate 112 becomes smaller (the distance between the two adjacent arc-shaped bodies 11 becomes larger), the inner arc-shaped plate 112 presses the telescopic part 12, so that the telescopic part 12 is unfolded, at this time, the variable-diameter plate 15 moves with the telescopic part 12, and the B expansion lifting plate 142 and the A expansion lifting plate 141 are relatively displaced, the size of the cavity 1 becomes larger; the limiting nut 132 is rotated inward, the arc-shaped body 11 moves inward, at this time, the space between the arc-shaped pressing plate 134 and the inner arc-shaped plate 112 becomes larger (the distance between the two adjacent arc-shaped bodies 11 becomes smaller), the telescopic part 12 is contracted, and the size of the cavity 1 becomes smaller. In addition, after the polishing disc is pressed, the limiting nut 132 can be rotated to move the arc-shaped body 11 outward, so that the variable-diameter plate 15 and the inner arc-shaped plate 112 are separated from the outer side surface of the polishing disc, thereby facilitating the smooth demolding of the polishing disc, reducing the demolding difficulty, reducing the damage of the polishing disc, and improving the demolding yield.

[0034] In the embodiment, a stop block 143 is arranged between the adjacent A expansion lifting plate 141 and B expansion lifting plate 142 to prevent the powder from flowing out of the gap between the two expansion lifting plates during pressing.

[0035] Referring to Figure 3 and Figure 4In the embodiment, the permanent magnetic chuck 2 comprises a shell 21; the shell 21 is internally provided with a first magnetic disk 22 and a second magnetic disk 23 which are distributed in an up-down manner; the second magnetic disk 23 is fixedly connected with the shell 21, and the first magnetic disk 22 is rotatable relative to the shell 21; permanent magnet blocks 24 are correspondingly installed in the first magnetic disk 22 and the second magnetic disk 23; a handle 221 is arranged on the outer circumferential surface of the first magnetic disk 22, and the handle 221 extends out of the shell 21. In a magnetized state, the S poles of the permanent magnet blocks 24 in the first magnetic disk 22 and the permanent magnet blocks 24 in the second magnetic disk 23 are opposite to each other, and the N poles are opposite to each other (see Figure 14 b); in a demagnetized state, the S poles of the permanent magnet blocks 24 in the first magnetic disk 22 and the permanent magnet blocks 24 in the second magnetic disk 23 are opposite to the N poles, and the N poles are opposite to the S poles (see Figure 14 a). In use, the angle of the first magnetic disk 22 is adjusted by rotating the handle 221 to change the magnetic circuit, so as to magnetize or demagnetize the permanent magnetic chuck 2, and to adsorb or release the formed assembly 3 (the magnetization and demagnetization principles are shown in Figure 15 a, b). When magnetized, the magnetic force lines of the permanent magnet blocks 24 in the two magnetic disks form a loop through the working surface of the permanent magnetic chuck 2, so as to adsorb the formed assembly 3 on the working surface of the permanent magnetic chuck 2; when demagnetized, the permanent magnet blocks 24 in the two magnetic disks themselves form a closed magnetic force line loop, and the magnetic force lines do not pass through the working surface of the permanent magnetic chuck 2, so as to fail to adsorb the formed assembly 3). Further, the shell 21 comprises a base 211 and a disk cover 212 (the base 211 and the disk cover 212 are fixedly connected by bolts 214); the middle part of the base 211 is provided with a clamping block 213, and correspondingly, the middle part of the second magnetic disk 23 is provided with a clamping groove 231, and the clamping block 213 is clamped into the clamping groove 231.

[0036] In the embodiment, the connecting piece 32 is provided with a slot; when the formed assembly 3 is assembled, the leaf of the hinge 31 is inserted into the slot and fixed with the connecting piece 32. By adjusting the angle of the hinge 31 and the connection position of the hinge 31 and the connecting piece 32, different shapes of splicing pieces (for example, large hexagon, large quadrilateral, small hexagon, small quadrilateral, etc., see Figure 9 a, b, c, d) can be spliced, and then a plurality of splicing pieces are combined together, so as to form a formed assembly 3 of a corresponding shape (see Figures 10 to 13 ). Taking a large hexagon as an example, one splicing piece comprises six hinges 32 and six connecting pieces 32; when splicing, the angle of the hinge 31 is adjusted to 120°, and the hinges 31 are sequentially connected by the connecting pieces 32 (only part of the leaf of the hinge 31 is inserted into the slot of the connecting piece 32); then a plurality of splicing pieces are combined, so as to form a large hexagonal formed assembly 3.

[0037] In use, the cavity 1 is fixed on the workbench of the press 4, the permanent magnet chuck 2 is fixed on the top of the press 4, and the forming assembly 3 is distributed opposite to the cavity 1 (see Figure 16 ).

[0038] The use method of the forming die capable of being used for manufacturing polishing and grinding discs of different sizes and surface shapes, specifically comprises the following steps:

[0039] Firstly, the size of the polishing and grinding disc to be manufactured is determined, the telescopic part 12 is controlled to be telescoped through the adjusting part 13 (i.e. the telescopic part 12 is controlled to be telescoped by rotating the limiting nut 132 to adjust the size of the cavity 1), the inner diameter of the cavity 1 is made consistent with the diameter of the polishing and grinding disc to be manufactured, and the expansion lifting plate 14 is moved upwards to increase the height of the cavity 1; at the same time, the forming assembly 3 of the corresponding shape is assembled according to the surface shape required by the polishing and grinding disc, and the forming assembly 3 is adsorbed on the permanent magnet chuck 2 (if the surface shape of the polishing and grinding disc needs to be changed, the first magnetic disc 22 is rotated to realize demagnetization, the forming assembly 3 is taken off from the permanent magnet chuck 2, and the forming assembly 3 is reassembled into the required shape);

[0040] Then, the powder of the required material is mixed in a certain proportion and filled into the cavity 1, and the press 4 drives the permanent magnet chuck 2 to descend to press the powder in the cavity 1; during the pressing, the bottom of the permanent magnet chuck 2 will touch the expansion lifting plate 14 and press the expansion lifting plate 14 downwards, at this time, the internal volume of the cavity 1 becomes smaller, the powder is compressed and solidified, and at the same time, the forming assembly 3 is pressed into the powder to form the corresponding surface shape on the surface of the polishing and grinding disc formed by pressing (the states before and after pressing are shown in Figure 17 a, b);

[0041] After the pressing is completed, the press 4 drives the permanent magnet chuck 2 to ascend to separate from the surface of the polishing and grinding disc formed, and then demolding is performed.

[0042] The general description of the invention involved in the present application and the description of the specific embodiments thereof should not be understood as a limitation on the technical solutions of the invention. Based on the disclosure of the present application, the skilled in the art can add, reduce or combine the disclosed technical features in the general description or / and the specific embodiments (including the embodiments) without violating the elements of the invention involved, to form other technical solutions within the protection scope of the present application.

Claims

1. A forming die that can be used to manufacture grinding and polishing discs of different sizes and surface shapes, characterized by: It comprises a cavity (1), a permanent magnetic chuck (2) and a molding component (3); The cavity (1) comprises a plurality of arc-shaped bodies (11), and the plurality of arc-shaped bodies (11) are connected in sequence to form a ring, and the interior is used to fill the material powder required for pressing the polishing disc; two adjacent arc-shaped bodies (11) are connected by a telescopic member (12); the telescopic member (12) cooperates with the regulating member (13), and is expanded and contracted under the control of the regulating member (13), thereby adjusting the distance between the two adjacent arc-shaped bodies (11) to change the inner diameter of the cavity (1); each arc-shaped body (11) is connected to the inner diameter of the cavity (1); ) are provided with expansion lifting plates (14) on the inner side; the expansion lifting plates (14) are arc-shaped and arranged in sequence to form a ring; the expansion lifting plates (14) can move up and down relative to the arc-shaped main body (11); the arc-shaped main body (11) includes a base block (111), and an inner arc plate (112) and an outer arc plate (113) fixed to the inner and outer sides of the base block (111); the telescopic member (12) is located between the inner arc plate (112) and the outer arc plate (113), and its two ends are respectively connected to the two sides. The base block (111) is hinged; the telescopic member (12) includes a plurality of telescopic blocks (121) hinged in sequence; a diameter reducing plate (15) is provided between the telescopic block (121) and the inner arc plate (112), and one end of the diameter reducing plate (15) is fixed to the telescopic block (121); the adjusting member (13) includes an adjusting screw rod (131) and a limiting nut (132); the outer end of the adjusting screw rod (131) is fixed to the annular fixing member (16), and the inner end passes through the through hole on the outer arc plate (113) , and is fixed on the arc-shaped pressure plate (133); the inner side surface of the arc-shaped pressure plate (133) contacts the outer side surface of the telescopic block (121); the limit nut (132) is located on the outer side of the outer arc-shaped plate (113); the expansion lifting plate (14) includes an A expansion lifting plate (141) and a B expansion lifting plate (142) that are staggered; the A expansion lifting plate (141) is slidably connected to the inner arc-shaped plate (112), and the B expansion lifting plate (142) is slidably connected to the variable diameter plate (15); The permanent magnetic chuck (2) is used to absorb the molding component (3) and simultaneously compress the powder filled in the cavity (1); The forming assembly (3) comprises a plurality of hinges (31) and a plurality of connecting pieces (32) for use together; the connecting piece (32) is used to connect two adjacent hinges (31); when in use, the hinges (31) and the connecting pieces (32) are spliced ​​and combined to form forming assemblies (3) of different shapes, so that a surface shape that meets design requirements is formed on the polishing disc.

2. The forming die for manufacturing polishing discs of different sizes and surface shapes according to claim 1, characterized in that: A stopper (143) is provided between the adjacent A expansion lifting plate (141) and B expansion lifting plate (142).

3. The forming die for manufacturing polishing discs of different sizes and surface shapes according to claim 1, characterized in that: The diameter-changing plate (15) is a thin steel plate.

4. The forming die for manufacturing polishing discs of different sizes and surface shapes according to claim 1, characterized in that: The permanent magnetic chuck (2) comprises a shell (21); a first magnetic disk (22) and a second magnetic disk (23) are provided inside the shell (21) and are distributed up and down; the second magnetic disk (23) is fixedly connected to the shell (21), and the first magnetic disk (22) can rotate relative to the shell (21); permanent magnet blocks (24) are correspondingly installed in the first magnetic disk (22) and the second magnetic disk (23); when magnetizing, the permanent magnet blocks (24) opposite to each other in the first magnetic disk (22) and the second magnetic disk (23) are opposite to each other with the same poles; when demagnetizing, the permanent magnet blocks (24) opposite to each other in the first magnetic disk (22) and the second magnetic disk (23) are opposite to each other with different poles.

5. The forming die for manufacturing polishing discs of different sizes and surface shapes according to claim 4, characterized in that: A handle (221) is provided on the outer peripheral surface of the first magnetic disk (22).

6. The forming die for manufacturing polishing discs of different sizes and surface shapes according to claim 4, characterized in that: The housing (21) comprises a base (211) and a disk cover (212); a clamping block (213) is provided in the middle of the base (211); correspondingly, a clamping slot (231) is provided in the middle of the second magnetic disk (23), and the clamping block (213) is clamped into the clamping slot (231).

Images