High-precision die grinding machine

Abstract

The utility model discloses a high-precision die grinding machine, which belongs to the technical field of die processing equipment and comprises a frame, a driving mechanism, a grinding abrasive belt action structure, an abrasive belt adjusting mechanism and a limit mounting mechanism. The driving mechanism is arranged in the rack, the grinding abrasive belt action structure is movably arranged on the rack, and the driving mechanism is in driving connection with the grinding abrasive belt action structure; the abrasive belt adjusting mechanism is arranged on the rack, and the abrasive belt adjusting mechanism is movably connected with the grinding abrasive belt action structure; and the limiting mounting mechanism is adjacent to the grinding abrasive belt action structure and is arranged on the rack. The high-precision die grinding machine solves the technical problem of how to improve the grinding machining precision of the grinding machine.

Description

Technical Field

[0001] This utility model relates to the technical field of mold processing equipment, and in particular to a high-precision mold grinding machine. Background Technology

[0002] Injection molds are core tools in the plastics processing industry. By injecting molten plastic into a mold cavity, plastic products with specific shapes and precision can be formed after cooling and solidification. In industrial applications, injection molds enable the mass production of plastic products with complex shapes and precise dimensions.

[0003] In injection mold manufacturing, grinding machines are key equipment to ensure high precision and surface quality of molds, especially suitable for the precision machining of hardened steel, alloys, and other materials. Through the precise contact between the grinding wheel and the workpiece, grinding machines can achieve micron-level machining accuracy, controlling workpiece errors within ±1μm and reducing surface roughness to Ra<0.05μm, thereby meeting the mirror finish requirements of key components such as injection mold cavities and sliders.

[0004] Based on this, Chinese patent CN213970447U discloses a grinding machine for clamping injection molds securely. It includes a lathe with a grinding head at its upper end and an operating table. A placement block is positioned on the upper side of the operating table. Electronic telescopic adjusters are installed on the four sides of the placement block. Connecting plates are installed on the four sides of the upper end of the placement block, and a connecting rod is threaded through the lower end of the connecting plates. A limiting push block is installed at the end of the connecting rod close to the center of the placement block. A limiting disc is installed at the connection between the limiting push block and the connecting rod. A fastening spring is provided between the limiting disc and the connecting plate. A connecting block is also provided at the end of the connecting rod away from the limiting push block. This grinding machine has the advantage of simple structure. The connecting rod slides and extends on the connecting plate, and the limiting push block compresses the fastening spring. After the mold is installed, the connecting rod is released, allowing the fastening spring to rebound, facilitating mold fixation.

[0005] However, the aforementioned grinding machines still have technical problems with insufficient machining accuracy. Specifically, although the aforementioned injection mold processing grinding machines can improve the clamping stability of workpieces during grinding, in the grinding process of mold cores, inserts, and other workpieces of injection molds, different workpieces require different grinding surfaces; often, multiple surfaces of the workpiece need to be ground simultaneously to obtain sufficient surface accuracy to meet the design mirror finish requirements. Utility Model Content

[0006] Therefore, it is necessary to provide a high-precision mold grinding machine to address the technical problem of how to improve the grinding accuracy of grinding machines.

[0007] A high-precision mold grinding machine includes: a frame, a drive mechanism, a grinding belt actuation structure, a belt adjustment mechanism, and a limiting installation mechanism; the drive mechanism is disposed within the frame, the grinding belt actuation structure is movably disposed on the frame, and the drive mechanism is drivenly connected to the grinding belt actuation structure; the belt adjustment mechanism is disposed on the frame and movably connected to the grinding belt actuation structure; the limiting installation mechanism is disposed adjacent to the grinding belt actuation structure on the frame.

[0008] Furthermore, the drive mechanism includes a servo motor, a reducer, a first output shaft, an output wheel, a transmission belt, a transmission wheel, a second output shaft, and an output bearing; the servo motor is drivenly connected to the reducer, the reducer is disposed within the frame, and the reducer is drivenly connected to the first output shaft; the output wheel is connected to the first output shaft, and the transmission belt connects the output wheel and the transmission wheel respectively; the transmission wheel is connected to the second output shaft, the output bearing is disposed within the frame, the second output shaft is movably connected within the output bearing, and the second output shaft is connected to the grinding belt actuation structure.

[0009] Furthermore, the grinding belt actuation structure includes a drive abrasive belt wheel, several support abrasive belt wheels, a reversing support frame, a movable abrasive belt wheel, and a grinding belt; the drive abrasive belt wheel is connected to the second output shaft, the several support abrasive belt wheels are evenly distributed on the reversing support frame, and the reversing support frame is movably connected to the side of the frame; the movable abrasive belt wheel is connected to the abrasive belt adjustment mechanism, and the grinding belt is respectively connected to the drive abrasive belt wheel, each of the support abrasive belt wheels, and the movable abrasive belt wheel; the grinding belt is arranged adjacent to the limiting installation mechanism.

[0010] Furthermore, the sanding belt adjustment mechanism has a first adjustment part, a second adjustment part, and a sanding belt adjustment part; the second adjustment part is disposed above the first adjustment part, and the sanding belt adjustment part is disposed above the second adjustment part.

[0011] Furthermore, the sanding belt adjustment unit includes a sanding belt adjustment cylinder, a sanding belt adjustment piston rod, a fixed connecting rod, a swing connecting rod, and a movable support shaft for the sanding belt wheel.

[0012] Furthermore, the sanding belt adjusting cylinder is movably mounted on the second adjusting part, and the sanding belt adjusting cylinder is drivenly connected to the sanding belt adjusting piston rod; the fixed connecting rod is fixedly mounted on the second adjusting part, one end of the swing connecting rod is movably connected to the upper end of the fixed connection, the other end of the swing connecting rod is connected to the movable support shaft of the sanding belt wheel, the end of the sanding belt adjusting piston rod is connected to the middle part of the swing connecting rod; the movable support shaft of the sanding belt wheel is connected to the movable sanding belt wheel.

[0013] Furthermore, the first adjusting part has a first connecting rod, a first telescopic rod, a first tightening part, and a support frame; the first telescopic rod is movably disposed in the first connecting rod, and the first tightening part connects the first connecting rod and the first telescopic rod respectively; the support frame is disposed on the first telescopic rod, and the limiting installation mechanism is disposed on the support frame.

[0014] Furthermore, the second adjusting part has a second connecting rod, a second telescopic rod, and a second tightening part; the second telescopic rod is movably disposed within the second connecting rod, and the second tightening part connects the second connecting rod and the second telescopic rod respectively; the reversing support frame is connected to the side of the second telescopic rod.

[0015] Furthermore, the limiting installation mechanism includes a limiting fixture, a locking cover plate, a pressing and pushing block, and a pressing and pushing cylinder.

[0016] Furthermore, the limiting fixture is arranged adjacent to the grinding belt, and the limiting fixture is mounted on the support frame; the locking cover plate is movably mounted on the limiting fixture, the clamping push block is movably mounted in the limiting fixture, the clamping push cylinder is drivenly connected to the clamping push block, and the clamping push cylinder is fixedly mounted on the support frame.

[0017] In summary, the high-precision mold grinding machine of this utility model is provided with a frame, a drive mechanism, a grinding belt actuation structure, a belt adjustment mechanism, and a limiting installation mechanism; the drive mechanism is disposed in the frame, the grinding belt actuation structure is movably disposed on the frame, and the drive mechanism is drivenly connected to the grinding belt actuation structure; the belt adjustment mechanism is disposed on the frame and is movably connected to the grinding belt actuation structure; the limiting installation mechanism is disposed on the frame adjacent to the grinding belt actuation structure. The abrasive belt adjustment mechanism can automatically change the working position of the grinding abrasive belt action structure, so that the grinding abrasive belt action structure can change the grinding angle in real time, thereby automatically grinding different positions of the workpiece; so that different positions of the workpiece can be ground and polished simultaneously in a single grinding process; firstly, it can reduce the repeated clamping process of the workpiece, and secondly, it can eliminate the need for repeated workpiece position correction, and reduce grinding errors caused by inaccurate clamping; therefore, this utility model of a high-precision mold grinding machine solves the technical problem of how to improve the grinding accuracy of grinding machines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-precision mold grinding machine according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a high-precision mold grinding machine according to this utility model from another direction;

[0020] Figure 3 This is a schematic diagram of the structure of a high-precision mold grinding machine according to this utility model from another direction;

[0021] Figure 4 This is a schematic diagram of the structure of a high-precision mold grinding machine according to this utility model from another direction. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please refer to the following: Figures 1 to 4 This utility model discloses a high-precision mold grinding machine, comprising: a frame 1, a drive mechanism 2, a grinding belt actuation structure 3, a belt adjustment mechanism 4, and a limiting installation mechanism 5; the drive mechanism 2 is disposed within the frame 1, the grinding belt actuation structure 3 is movably disposed on the frame 1, and the drive mechanism 2 is drivenly connected to the grinding belt actuation structure 3; the belt adjustment mechanism 4 is disposed on the frame 1, and the belt adjustment mechanism 4 is movably connected to the grinding belt actuation structure 3; the limiting installation mechanism 5 is disposed adjacent to the grinding belt actuation structure 3 on the frame 1.

[0029] Specifically, when the high-precision mold grinding machine of this invention is in operation, the user can first place the workpiece to be ground into the limiting installation mechanism 5, and the limiting installation mechanism 5 will limit and connect the placed workpiece. Then, the driving mechanism 2 drives the grinding belt action structure 3 to operate, so that the workpiece placed in the limiting installation mechanism 5 can be ground by the grinding belt action structure 3. During the grinding process of the grinding belt action structure 3, the belt adjustment mechanism 4 can automatically change the working position of the grinding belt action structure 3, so that the grinding belt action structure 3 can change the grinding angle in real time, thereby automatically grinding different positions of the workpiece; so that different positions of the workpiece can be ground and polished simultaneously in a single grinding process; firstly, it can reduce the repeated clamping of the workpiece, and secondly, it can avoid repeated workpiece position correction, reducing grinding errors caused by inaccurate clamping; therefore, the high-precision mold grinding machine of this invention solves the technical problem of how to improve the grinding accuracy of the grinding machine.

[0030] Furthermore, the drive mechanism 2 includes a servo motor 201, a reducer 202, a first output shaft 203, an output wheel 204, a transmission belt 205, a transmission wheel 206, a second output shaft 207, and an output bearing 208. The servo motor 201 is drivenly connected to the reducer 202, which is disposed in the frame 1 and is drivenly connected to the first output shaft 203. The output wheel 204 is connected to the first output shaft 203, and the transmission belt 205 connects the output wheel 204 and the transmission wheel 206 respectively. The transmission wheel 206 is connected to the second output shaft 207, and the output bearing 208 is disposed in the frame 1. The second output shaft 207 is movably connected to the output bearing 208 and is connected to the grinding belt actuation structure 3.

[0031] Furthermore, the grinding belt action structure 3 includes a drive belt wheel 301, several support belt wheels 302, a reversing support frame 303, a movable belt wheel 304, and a grinding belt 305; the drive belt wheel 301 is connected to the second output shaft 207, the several support belt wheels 302 are evenly distributed on the reversing support frame 303, and the reversing support frame 303 is movably connected to the side of the frame 1; the movable belt wheel 304 is connected to the belt adjustment mechanism 4, and the grinding belt 305 is connected to the drive belt wheel 301, each of the support belt wheels 302, and the movable belt wheel 304 respectively, and the grinding belt 305 is arranged adjacent to the limiting installation mechanism 5.

[0032] Furthermore, the sanding belt adjustment mechanism 4 has a first adjustment part 401, a second adjustment part 402, and a sanding belt adjustment part 403; the second adjustment part 402 is disposed on the first adjustment part 401, and the sanding belt adjustment part 403 is disposed on the second adjustment part 402. The sanding belt adjustment part 403 has a sanding belt adjustment cylinder 403a, a sanding belt adjustment piston rod 403b, a fixed connecting rod 403c, a swing connecting rod 403d, and a movable support shaft 403e for the sanding belt wheel.

[0033] Specifically, the sanding belt adjusting cylinder 403a is movably mounted on the second adjusting part 402, and the sanding belt adjusting cylinder 403a is drivenly connected to the sanding belt adjusting piston rod 403b; the fixed connecting rod 403c is fixedly mounted on the second adjusting part 402, one end of the swing connecting rod 403d is movably connected to the upper end of the fixed connecting rod 403c, the other end of the swing connecting rod 403d is connected to the movable support shaft 403e of the sanding belt wheel, the end of the sanding belt adjusting piston rod 403b is connected to the middle part of the swing connecting rod 403d; the movable support shaft 403e of the sanding belt wheel is connected to the movable sanding belt wheel 304.

[0034] Furthermore, the first adjusting part 401 has a first connecting rod 401a, a first telescopic rod 401b, a first tightening part 401c, and a support frame 401d; the first telescopic rod 401b is movably disposed in the first connecting rod 401a, and the first tightening part 401c connects the first connecting rod 401a and the first telescopic rod 401b respectively; the support frame 401d is disposed on the first telescopic rod 401b, and the limiting installation mechanism 5 is disposed on the support frame 401d.

[0035] Furthermore, the second adjustment part 402 has a second connecting rod 402a, a second telescopic rod 402b, and a second tightening part 402c; the second telescopic rod 402b is movably disposed in the second connecting rod 402a, and the second tightening part 402c connects the second connecting rod 402a and the second telescopic rod 402b respectively; the reversing support frame 303 is connected to the side of the second telescopic rod 402b.

[0036] Furthermore, the limiting installation mechanism 5 includes a limiting fixture 501, a locking cover plate 502, a pressing and pushing block 503, and a pressing and pushing cylinder 504; the limiting fixture 501 is arranged adjacent to the grinding belt 305, and the limiting fixture 501 is disposed on the support frame 401d; the locking cover plate 502 is movably disposed on the limiting fixture 501, the pressing and pushing block 503 is movably disposed within the limiting fixture 501, the pressing and pushing cylinder 504 is drivenly connected to the pressing and pushing block 503, and the pressing and pushing cylinder 504 is fixedly disposed on the support frame 401d.

[0037] Specifically, when the servo motor 201 is powered on, the output power can be reduced and the torque increased by the reducer 202, and the power is output to the first output shaft 203, which drives the output wheel 204 to rotate; then the transmission belt 205 links the output wheel 204 and the transmission wheel 206; finally, the power is transmitted to the second output shaft 207 through the transmission wheel 206, and the output bearing 208 provided on the frame 1 can support the rotation of the second output shaft 207.

[0038] Furthermore, when the second output shaft 207 rotates, it can drive the transmission sanding belt wheel 301 to rotate simultaneously. Then, the grinding belt 305, which is connected to the transmission sanding belt wheel 301, each of the support sanding belt wheels 302 and the movable sanding belt wheel 304 respectively, can be driven by the transmission sanding belt wheel 301 to reciprocate. The support sanding belt wheel 302 and the movable sanding belt wheel 304 support the reciprocating motion of the grinding belt 305.

[0039] Furthermore, when it is necessary to adjust the grinding working angle of the grinding belt 305, the belt adjusting cylinder 403a can drive the belt adjusting piston rod 403b to extend or shorten according to a preset program, thereby pushing the swing connecting rod 403d to reciprocate around the connection fulcrum between it and the fixed connecting rod 403c. When the swing connecting rod 403d swings, it can drive the movable support shaft 403e of the belt wheel to reciprocate within a preset trajectory, thereby driving the movable belt wheel 304, which is movably mounted on the movable support shaft 403e of the belt wheel, to reciprocate along its trajectory.

[0040] Therefore, when the movable abrasive belt wheel 304 moves, it can drive the grinding belt 305, so that the grinding belt 305 simultaneously drives each of the supporting abrasive belt wheels 302. Since the supporting abrasive belt wheels 302 are disposed on the side of the reversing support frame 303, and the reversing support frame 303 is movably disposed on the side of the second adjusting part 402, when the supporting abrasive belt wheels 302 are driven, the reversing support frame 303 can be driven simultaneously, so that the reversing support frame 303 is oscillating back and forth. In this way, the traveling direction of the grinding belt 305 can be changed, thereby achieving the purpose of changing the grinding direction of the grinding belt 305.

[0041] Furthermore, after the operator loosens the first tightening part 401c, the first telescopic rod 401b can be lengthened or shortened, thereby allowing the reversing support frame 303 located on the side of the first telescopic rod 401b to move back and forth following the movement of the first telescopic rod 401b. This can, firstly, further change the grinding angle of the grinding belt 305, and secondly, adjust the tension of the grinding belt 305.

[0042] Furthermore, after the operator loosens the second tightening part 402c, the second telescopic rod 402b can be lengthened or shortened, thereby changing the relative position of the support frame 401d. This allows the relative position of the limiting installation mechanism 5, which is mounted on the support frame 401d, to be changed synchronously, thereby changing the relative position between the workpiece and the grinding belt 305.

[0043] Furthermore, the user can unlock and remove the locking cover plate 502 from the limiting fixture 501, place the workpiece to be ground into the limiting fixture 501, and then reset and lock the locking cover plate 502 again. Through the driving and pushing action of the top-pressing pushing cylinder 504 on the top-pressing pushing block 503, the product placed in the limiting fixture 501 can be pushed into the working range of the grinding belt 305 as needed; and the force of the workpiece being pressed and ground can be further adjusted.

[0044] In summary, the high-precision mold grinding machine of this utility model is provided with a frame 1, a drive mechanism 2, a grinding belt actuation structure 3, a belt adjustment mechanism 4, and a limiting installation mechanism 5. The drive mechanism 2 is disposed in the frame 1, and the grinding belt actuation structure 3 is movably disposed on the frame 1. The drive mechanism 2 is drivenly connected to the grinding belt actuation structure 3. The belt adjustment mechanism 4 is disposed on the frame 1 and is movably connected to the grinding belt actuation structure 3. The limiting installation mechanism 5 is disposed on the frame 1 adjacent to the grinding belt actuation structure 3. The abrasive belt adjustment mechanism 4 can automatically change the working position of the grinding abrasive belt action structure 3, so that the grinding abrasive belt action structure 3 can change the grinding angle in real time, thereby automatically grinding different positions of the workpiece; so that different positions of the workpiece can be ground and polished simultaneously in a single grinding process; firstly, it can reduce the repeated clamping process of the workpiece, and secondly, it can eliminate the need for repeated position correction of the workpiece, and reduce the grinding error caused by inaccurate clamping; therefore, the high-precision mold grinding machine of this utility model solves the technical problem of how to improve the grinding accuracy of the grinding machine.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-precision mold grinding machine, characterized in that, It includes: a frame (1), a drive mechanism (2), a grinding belt actuation structure (3), a belt adjustment mechanism (4), and a limiting installation mechanism (5); the drive mechanism (2) is disposed in the frame (1), the grinding belt actuation structure (3) is movably disposed on the frame (1), and the drive mechanism (2) is drivenly connected to the grinding belt actuation structure (3); the belt adjustment mechanism (4) is disposed on the frame (1), and the belt adjustment mechanism (4) is movably connected to the grinding belt actuation structure (3); the limiting installation mechanism (5) is disposed on the frame (1) adjacent to the grinding belt actuation structure (3).

2. The high-precision mold grinding machine according to claim 1, characterized in that: The drive mechanism (2) includes a servo motor (201), a reducer (202), a first output shaft (203), an output wheel (204), a transmission belt (205), a transmission wheel (206), a second output shaft (207), and an output bearing (208); the servo motor (201) is drivenly connected to the reducer (202), the reducer (202) is disposed in the frame (1), and the reducer (202) is drivenly connected to the first output shaft (203); The output wheel (204) is connected to the first output shaft (203), and the transmission belt (205) connects the output wheel (204) and the transmission wheel (206) respectively; the transmission wheel (206) is connected to the second output shaft (207), the output bearing (208) is disposed in the frame (1), the second output shaft (207) is movably connected in the output bearing (208), and the second output shaft (207) is connected to the grinding belt action structure (3).

3. The high-precision mold grinding machine according to claim 2, characterized in that: The grinding belt action structure (3) includes a drive belt wheel (301), several support belt wheels (302), a reversing support frame (303), a movable belt wheel (304), and a grinding belt (305). The drive belt wheel (301) is connected to the second output shaft (207). Several support belt wheels (302) are evenly distributed on the reversing support frame (303). The reversing support frame (303) is movably connected to the side of the frame (1). The movable belt wheel (304) is connected to the belt adjustment mechanism (4). The grinding belt (305) is connected to the drive belt wheel (301), each of the support belt wheels (302), and the movable belt wheel (304). The grinding belt (305) is arranged adjacent to the limiting installation mechanism (5).

4. A high-precision mold grinding machine according to claim 3, characterized in that: The sanding belt adjustment mechanism (4) has a first adjustment part (401), a second adjustment part (402) and a sanding belt adjustment part (403); the second adjustment part (402) is disposed on the first adjustment part (401), and the sanding belt adjustment part (403) is disposed on the second adjustment part (402).

5. A high-precision mold grinding machine according to claim 4, characterized in that: The sanding belt adjustment unit (403) includes a sanding belt adjustment cylinder (403a), a sanding belt adjustment piston rod (403b), a fixed connecting rod (403c), a swing connecting rod (403d), and a sanding belt wheel movable support shaft (403e).

6. A high-precision mold grinding machine according to claim 5, characterized in that: The belt sander adjustment cylinder (403a) is movably mounted on the second adjustment part (402), and the belt sander adjustment cylinder (403a) is drivenly connected to the belt sander adjustment piston rod (403b); the fixed connecting rod (403c) is fixedly mounted on the second adjustment part (402), one end of the swing connecting rod (403d) is movably connected to the upper end of the fixed connecting rod (403c), the other end of the swing connecting rod (403d) is connected to the movable support shaft (403e) of the belt sander, the end of the belt sander adjustment piston rod (403b) is connected to the middle part of the swing connecting rod (403d); the movable support shaft (403e) of the belt sander is connected to the movable belt sander (304).

7. A high-precision mold grinding machine according to claim 6, characterized in that: The first adjustment unit (401) has a first connecting rod (401a), a first telescopic rod (401b), a first tightening part (401c), and a support frame (401d); the first telescopic rod (401b) is movably disposed in the first connecting rod (401a), and the first tightening part (401c) connects the first connecting rod (401a) and the first telescopic rod (401b) respectively; the support frame (401d) is disposed on the first telescopic rod (401b), and the limiting installation mechanism (5) is disposed on the support frame (401d).

8. A high-precision mold grinding machine according to claim 7, characterized in that: The second adjustment part (402) has a second connecting rod (402a), a second telescopic rod (402b) and a second tightening part (402c); the second telescopic rod (402b) is movably disposed in the second connecting rod (402a), and the second tightening part (402c) connects the second connecting rod (402a) and the second telescopic rod (402b) respectively; the reversing support frame (303) is connected to the side of the second telescopic rod (402b).

9. A high-precision mold grinding machine according to claim 8, characterized in that: The limiting installation mechanism (5) includes a limiting fixture (501), a locking cover plate (502), a pressing and pushing block (503), and a pressing and pushing cylinder (504).

10. A high-precision mold grinding machine according to claim 9, characterized in that: The limiting fixture (501) is arranged adjacent to the grinding belt (305), and the limiting fixture (501) is arranged on the support frame (401d); the locking cover plate (502) is movably arranged on the limiting fixture (501), the top-pressing push block (503) is movably arranged in the limiting fixture (501), the top-pressing push cylinder (504) is drivenly connected to the top-pressing push block (503), and the top-pressing push cylinder (504) is fixedly arranged on the support frame (401d).

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