Foundry grinding machine based on subtractive manufacturing equipment

Abstract

The application provides a casting grinder based on subtractive manufacturing equipment and relates to the field of grinders, and comprises a grinding assembly which is composed of a pressure mechanism and a grinding mechanism, the tension degree and grinding pressure of a grinding belt do not change due to adaptive deformation of the grinding belt under the control of the pressure mechanism, so that the outer surface of a cylindrical casting can be stably ground while the grinding belt can always be in an appropriate tension degree, the tension degree of the grinding belt can be adjusted by artificial control and can be used under different grinding requirements, and the flexibility and stability are high; and the problems of adaptive deformation of the grinding belt of the existing grinder, continuous compression of the tension spring due to the deformation of the two side supports, continuous increase of the tension degree and grinding pressure of the grinding belt, and easy breakage and damage of the grinding belt and excessive grinding are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding machine, in particular to a foundry grinding machine based on subtractive manufacturing equipment. BACKGROUND

[0002] Subtractive manufacturing equipment is a processing device that realizes part forming by removing material. By means of cutting and grinding, the blank is processed into a workpiece that meets the accuracy requirements. It is widely used in the field of mechanical manufacturing. As a common mechanical part blank, the foundry needs to be processed by subtractive manufacturing equipment to improve the accuracy and surface quality. The grinding machine is a key equipment for grinding processing of foundry in subtractive manufacturing equipment. During the processing of foundry, the surface of the foundry needs to be ground by grinding tools (grinding wheel, grinding belt, etc.) to eliminate casting defects, ensure dimensional accuracy and surface roughness, and meet the requirements of part assembly and use. For example, the patent with the application number CN202010533717.8 discloses a sand belt movable grinding machine, which comprises a grinding tool, a sand belt, a transmission mechanism, a sand belt moving device and a moving control assembly. The sand belt is mounted on the transmission mechanism to grind the workpiece. The grinding tool is provided on the moving control assembly and is controlled by the moving control assembly. The sand belt moving device comprises a sand belt pushing piece, a sliding piece and a guide sliding assembly. The sliding piece is connected with the guide sliding assembly and slides along the guide sliding assembly. The sand belt pushing piece is mounted on the sliding piece and moves the sand belt under the driving of the sliding piece. The grinding machine makes different positions of the sand belt grind the workpiece, and through the cooperation of the sand belt moving device and the moving control assembly, the sand belt grinding is more uniform, and the product flatness and smoothness are improved.

[0003] As for the existing cylindrical foundry grinding machine, since the grinding belt is tensioned by a tension spring, when the grinding belt is attached to the curved surface of the cylindrical foundry, the flexible structure will deform adaptively along the curved surface of the foundry due to pressure. This deformation will cause the two side supports to move closer to each other, thereby continuously compressing the tension spring. This results in continuous increase in the tension of the grinding belt and the grinding pressure. This uncontrolled pressure easily causes the grinding belt to break due to excessive force, and also causes the foundry to be overground, making it difficult to ensure the processing accuracy and poor stability, and low practicality. SUMMARY

[0004] The application relates to a casting grinder based on subtractive manufacturing equipment, which has a grinding assembly, wherein a grinding mechanism can realize grinding operation on the outer surface of a cylindrical casting, and adopts belt grinding, the grinding area is maximized during machining, the efficiency is relatively high, and under the control of a pressure mechanism, the tension degree of the grinding belt and the grinding pressure will not change due to the adaptive deformation of the grinding belt, so that the grinding belt can be kept in the appropriate tension degree at all times, and the outer surface of the cylindrical casting can be stably ground, meanwhile, the tension degree of the grinding belt can be adjusted through artificial control, so that the grinder can be used under different grinding machining requirements, is convenient and flexible to use, can be used for rapidly grinding cylindrical castings with different outer diameter specifications, and has high flexibility, stability, adaptability and practicability.

[0005] The application provides a casting grinder based on subtractive manufacturing equipment, which specifically comprises: a machine tool assembly, the machine tool assembly comprising a mounting platform, a reciprocating seat, a positioning push rod and a three-jaw chuck, the reciprocating seat being inserted into the top of the mounting platform, the positioning push rod being fixedly installed on the side of the reciprocating seat, and the three-jaw chuck being rotationally connected to the top of the mounting platform; and a grinding assembly, the grinding assembly being composed of a pressure mechanism and a grinding mechanism.

[0006] The pressure mechanism comprises a mounting seat, a positioning plate, a pressure plate, a synchronous rod and an electric push rod, the mounting seat being fixedly installed at one end of the push rod of the positioning push rod, the positioning plate being inserted into the inside of the mounting seat, the positioning plate being fixedly installed at the bottom end of the push rod of the electric push rod, the pressure plate being inserted into the inside of the mounting seat, the synchronous rod being rotationally connected to the inside of the mounting seat, and the electric push rod being fixedly installed at the top of the mounting seat; and the grinding mechanism comprises a driving arm, a pressure arm, a positioning pulley and a grinding belt, the driving arm being inserted into the top of the mounting seat, the pressure arm being inserted into the bottom of the mounting seat, two positioning pulleys being rotationally connected to the driving arm and the pressure arm respectively, and the grinding belt being installed outside the four positioning pulleys.

[0007] Further, the grinding mechanism further comprises a driving mechanism, the driving mechanism comprising a driving motor and a driving rod, the driving motor being fixedly installed at the top of the mounting seat, the driving rod being rotationally connected to the side of the mounting seat, and the rotating shaft of the driving motor and the rod body top end of the driving rod being in transmission connection.

[0008] Further, the side of the driving arm is provided with a driving gear, and the rotating shaft outside one of the positioning pulleys on the driving arm is provided with a grinding gear, the gear teeth of the driving gear and the grinding gear are in meshing transmission.

[0009] Further, the inside of the driving gear is provided with a driving groove, and the rod body of the driving rod is in the shape of a regular polygon in the middle part, and the rod body part of the regular polygon cross section of the driving rod is inserted into the inside of the driving groove.

[0010] Further, the rod body of the synchronizing rod is externally provided with a helical synchronizing groove, and the two sections of the synchronizing groove are symmetrically arranged on the two sides of the synchronizing rod.

[0011] Further, the interior of the driving arm and the pressure arm is respectively provided with a synchronizing protrusion, and the synchronizing protrusions of the driving arm and the pressure arm are respectively inserted into the two sections of the synchronizing groove on the exterior of the synchronizing rod.

[0012] Further, the bottom of the pressure plate is provided with a functional tension spring, and the two ends of the functional tension spring are respectively abutted against the bottom of the pressure plate and the exterior of the pressure arm.

[0013] Further, the top of the pressure plate is provided with a positioning screw, and the positioning screw is screwed into the bottom of the positioning plate through the rod body.

[0014] Further, the pressure mechanism further comprises a displacement sensor, and the displacement sensor is fixedly installed on the bottom of the mounting seat and can monitor the position information of the pressure arm in the mounting seat.

[0015] The application provides a casting grinder based on subtractive manufacturing equipment, and has the following beneficial effects:

[0016] 1. The grinding mechanism can realize grinding operation on the outer surface of the cylindrical casting, and adopts belt grinding, so that the grinding area is maximized during processing, the efficiency is higher, and under the control of the pressure mechanism, the tension degree and grinding pressure of the grinding belt will not change due to the adaptive deformation of the grinding belt, so that the grinding belt can always be in the appropriate tension degree, and the outer surface of the cylindrical casting can be stably ground and processed, and the tension degree of the grinding belt can be adjusted by artificial control, so that it can be used under different grinding processing requirements, is convenient and flexible to use, can adapt to the rapid grinding processing of cylindrical castings with different outer diameter specifications, and improves the flexibility, adaptability, stability and practicality of the device.

[0017] 2. The grinding assembly has a double-arm synchronous opposite moving mechanism, the driving arm and the pressure arm of the grinding mechanism are matched through the helical synchronizing groove and the synchronizing protrusion of the synchronizing rod, synchronous opposite movement is realized, when the grinding belt is adapted to the adaptive deformation of the cylindrical casting arc surface, the spacing change between the driving arm and the pressure arm is forcibly constrained by the structure of the synchronizing rod, so that the casting is always in the center position of the grinding belt, this design avoids the grinding deviation problem caused by the traditional single-arm driving, especially when processing castings with different outer diameters, the accuracy of the grinding position can be continuously maintained, and the cylindricity and surface flatness are significantly improved.

[0018] 3. The grinding assembly has a constant pressure control function, and the pressure mechanism provides an initial tensioning force through a functional top spring, so that the grinding belt is kept tensioned in a non-processing state to prevent falling off. When processing, the displacement sensor monitors the displacement of the pressure arm in real time, and the electric push rod adjusts the position of the positioning plate through the control device, so that the distance between the positioning plate and the pressure arm is constant. Even if the grinding belt is deformed due to the curved surface of the casting, the compression amount of the functional top spring will not change, so as to lock the grinding pressure and tensioning degree, completely solve the defect that the pressure accumulates with the deformation amount in the traditional spring tensioning structure, avoid the breakage of the grinding belt and the excessive grinding of the casting, and ensure the stability of the processing precision.

[0019] 4. The grinding mechanism adopts a structure in which the annular grinding belt is sleeved on the four positioning pulleys, and the grinding belt is circularly moved at a constant linear speed through the driving motor, the driving rod, the driving gear and the grinding gear transmission, so that the contact area of the belt grinding is larger than that of the traditional grinding wheel grinding, the number of abrasive grains participating in grinding per unit time is significantly increased, and the reciprocating movement of the reciprocating seat along the axial direction of the casting can quickly cover the entire cylindrical surface, which is suitable for batch production scenes.

[0020] 5. The positioning screw of the pressure mechanism can adjust the position of the pressure plate through threads, change the initial compression amount of the functional top spring, and steplessly adjust the tensioning degree of the grinding belt. This design enables the equipment to finely grind soft castings such as aluminum alloy through low tensioning force, and also enables the equipment to process hard materials such as stainless steel through high tensioning force, and is compatible with cylindrical castings in different diameter ranges, so that the processing switching of castings of different materials and sizes can be completed without replacing core components, and the tooling cost is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0022] The drawings described in the following description only relate to some embodiments of the present application, and are not a limitation of the present application.

[0023] In the drawings:

[0024] Figure 1 The structure schematic diagram of the present application is shown.

[0025] Figure 2 The structure schematic diagram of the present application Figure 1 is shown.

[0026] Figure 3 The structure schematic diagram of the present application is shown.

[0027] Figure 4 The structure schematic diagram of the present application Figure 3The structure diagram of the middle B part is enlarged.

[0028] Figure 5 The structure diagram of the pressure mechanism is shown after disassembly.

[0029] Figure 6 The structure diagram of the grinding mechanism is shown after disassembly.

[0030] Figure 7 The structure diagram of the grinding operation on the thin cylindrical casting is shown.

[0031] Figure 8 The structure diagram of the grinding operation on the thick cylindrical casting is shown.

[0032] Figure 9 The structure diagram of the grinding belt tensioning force adjustment is shown.

[0033] Figure 10 The control system diagram of the displacement sensor is shown.

[0034] List of reference signs

[0035] 1. Machine tool assembly; 101. Mounting platform; 102. Reciprocating seat; 103. Positioning push rod; 104. Three-jaw chuck;

[0036] 2. Pressure mechanism; 201. Mounting seat; 202. Positioning plate; 203. Pressure plate; 2031. Functional top spring; 2032. Positioning screw; 204. Synchronous rod; 2041. Synchronous groove; 205. Electric push rod; 206. Displacement sensor;

[0037] 3. Grinding mechanism; 301. Driving arm; 3011. Driving gear; 3012. Driving groove; 302. Pressure arm; 3021. Synchronous protrusion; 303. Positioning pulley; 3031. Grinding gear; 304. Grinding belt; 305. Driving motor; 306. Driving rod. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0039] Please refer to Figures 1 to 10 Embodiment one:

[0040] The application provides a foundry grinding machine based on subtractive manufacturing equipment, which comprises a machine tool assembly 1, a grinding assembly, and a pressure mechanism 2.

[0041] The pressure mechanism 2 comprises a mounting seat 201, a positioning plate 202, a pressure plate 203, a synchronous rod 204 and an electric push rod 205, the mounting seat 201 is fixedly installed at one end of the push rod of the positioning push rod 103, the positioning plate 202 is inserted into the inside of the mounting seat 201, and the positioning plate 202 is fixedly installed at the bottom end of the push rod of the electric push rod 205, the pressure plate 203 is inserted into the inside of the mounting seat 201, and the synchronous rod 204 is rotationally connected to the inside of the mounting seat 201, and the electric push rod 205 is fixedly installed at the top of the mounting seat 201.

[0042] The bottom of the pressure plate 203 is provided with a functional top spring 2031, and the two ends of the functional top spring 2031 are respectively abutted against the bottom of the pressure plate 203 and the outside of the pressure arm 302, in use, the grinding belt 304 is in a tension state in a non-processing state, so as to avoid the phenomenon that the grinding belt 304 falls off, under the action of the functional top spring 2031, the driving arm 301 and the pressure arm 302 are in the upper and lower limit positions, so as to tension the grinding belt 304 for use, when the cylindrical casting is ground, after the cylindrical casting is fixed on the three-jaw chuck 104, the grinding assembly is moved by the positioning push rod 103 so that the grinding belt 304 abuts against the outer surface of the cylindrical casting, and then the grinding operation can be started, the reciprocating seat 102 can drive the grinding assembly to reciprocate along the axial direction of the cylindrical casting, so as to realize the overall grinding operation of the cylindrical casting, which is convenient and flexible to use and has high automation.

[0043] The pressure mechanism 2 further comprises a displacement sensor 206 fixedly installed at the bottom of the mounting seat 201, which can monitor the position information of the pressure arm 302 inside the mounting seat 201, and is electrically connected with the external power supply and the control device. The specific structure and working principle are mature technologies, and will not be repeated here. Under the control of the pressure mechanism 2, the tension of the grinding belt 304 and the grinding pressure will not change due to the adaptive deformation of the grinding belt 304. When the grinding belt 304 is in contact with the surface of the cylindrical casting, it will deform adaptively along the casting surface due to the pressure. Since the belt body of the grinding belt 304 is fixed, the grinding belt 304 will drive the drive arm 301 and the pressure arm 302 to move closer to each other when deforming. The rod body of the synchronous rod 204 is provided with a helical synchronous groove 2041. The synchronous groove 2041 is provided with two sections, which are symmetrically arranged on both sides of the synchronous rod 204. The drive arm 301 and the pressure arm 302 are provided with synchronous protrusions 3021 inside. The synchronous protrusions 3021 of the drive arm 301 and the pressure arm 302 are respectively inserted into the two sections of the synchronous groove 2041 outside the synchronous rod 204. Under the cooperation of the synchronous protrusions 3021 and the synchronous groove 2041, the drive arm 301 and the pressure arm 302 can move synchronously and oppositely, so that the cylindrical casting is always in the middle position of the grinding belt 304, ensuring the stability of the grinding process. When the pressure arm 302 moves, its displacement distance can be monitored by the displacement sensor 206 and the signal can be sent to the control device. The control device controls the electric push rod 205 to retract through the position change information monitored by the displacement sensor 206, so that the distance between the positioning plate 202 and the pressure arm 302 is always fixed. Therefore, the pressure arm 302 will not compress the functional top spring 2031 when moving, ensuring the stability of the tension of the grinding belt 304 and the grinding pressure. The displacement sensor 206 can monitor the position change of the pressure arm 302 in real time, so that the distance between the pressure plate 203 and the pressure arm 302 is always fixed regardless of the processing state, the processing is stable, the grinding efficiency is high, and the cylindrical casting with different roughness and outer diameter can be quickly and automatically ground. The grinding process is flexible and convenient to use

[0044] The side of the driving arm 301 is provided with a driving gear 3011, and the outer part of the rotating shaft of one of the positioning pulleys 303 on the driving arm 301 is provided with a grinding gear 3031, the teeth of the driving gear 3011 and the grinding gear 3031 are in meshing transmission, in use, the driving mechanism realizes the grinding action of the circulating movement of the grinding belt 304, when the driving motor 305 is powered on, it can drive the driving rod 306 to rotate, the driving rod 306 can drive the driving gear 3011 to rotate through the driving groove 3012 when rotating, the driving gear 3011 can drive the positioning pulley 303 to rotate through the grinding gear 3031 when rotating, so that the grinding belt 304 can circulate and move under the cooperation of the grinding belt 304 and the four positioning pulleys 303, and the outer surface of the cylindrical casting is realized.

[0045] The inside of the driving gear 3011 is provided with a driving groove 3012, and the middle rod body of the driving rod 306 is a regular polygon in cross section, and the rod body part of the regular polygon cross section of the driving rod 306 is inserted into the inside of the driving groove 3012, which makes the driving motor 305 always realize the circulating movement of the grinding belt 304 through the cooperation of the driving rod 306, the driving gear 3011 and the grinding gear 3031, regardless of the change of the use position of the driving arm 301, and the use is stable.

[0046] The top of the pressure plate 203 is provided with a positioning screw 2032, which is screwed into the bottom of the positioning plate 202 through the rod body thread, in use, the tension of the grinding belt 304 can be controlled and adjusted artificially, so that it can be used under different grinding processing requirements, when the positioning screw 2032 is rotated, the positioning screw 2032 can drive the pressure plate 203 to move on the bottom of the positioning plate 202 to change the use position through the rod body thread, the change of the use position of the pressure plate 203 changes the initial extension length of the functional top spring 2031, that is, the tension, which is convenient and flexible to control.

[0047] The specific use and role of the embodiment are as follows: in the embodiment, the tension of the grinding belt 304 can be adjusted according to actual processing requirements, and the tension of the grinding belt 304 can be adjusted by artificial control, so that the grinding belt 304 can be used under different grinding processing requirements. When the positioning screw 2032 is rotated, the positioning screw 2032 can drive the pressure plate 203 to move at the bottom of the positioning plate 202 to change the use position through the threaded rod body, the change of the use position of the pressure plate 203 changes the initial extension length of the functional tension spring 2031, that is, the tension, and after the adjustment is completed, the cylindrical casting can be subjected to grinding processing operation. The grinding belt 304 is in a tension state in a non-processing state, so as to avoid the phenomenon that the grinding belt 304 falls off. Under the action of the functional tension spring 2031, the driving arm 301 and the pressure arm 302 are in the upper and lower limit positions, so as to tension the grinding belt 304. After the cylindrical casting is fixed on the three-jaw chuck 104 during grinding processing of the cylindrical casting, the grinding assembly is driven to move by the positioning push rod 103 to make the grinding belt 304 abut against the outer surface of the cylindrical casting, and then the grinding operation can be started. The reciprocating seat 102 can drive the grinding assembly to reciprocate along the axial direction of the cylindrical casting, so as to realize overall grinding processing operation of the cylindrical casting. Under the control of the pressure mechanism 2, the tension of the grinding belt 304 and the grinding pressure will not change due to the adaptive deformation of the grinding belt 304. When the grinding belt 304 abuts against the surface of the cylindrical casting, the grinding belt 304 will deform adaptively along the casting curved surface due to the pressure. Since the belt body of the grinding belt 304 is fixed, the driving arm 301 and the pressure arm 302 will move close to each other during the deformation of the grinding belt 304. Under the cooperation of the synchronous protrusions 3021 and the synchronous grooves 2041, the driving arm 301 and the pressure arm 302 can move synchronously and oppositely, so that the cylindrical casting is always located in the middle position of the grinding belt 304, and the stability of the grinding processing is ensured. When the pressure arm 302 moves, the displacement distance of the pressure arm 302 can be monitored by the displacement sensor 206 and the signal can be sent to the control device. The control device controls the electric push rod 205 to retract through the position change information monitored by the displacement sensor 206, so that the distance between the positioning plate 202 and the pressure arm 302 is always a fixed value, so that the pressure arm 302 will not compress the functional tension spring 2031 during movement, and the stability of the tension of the grinding belt 304 and the grinding pressure is ensured. The displacement sensor 206 can monitor the position change of the pressure arm 302 in real time, so that the distance between the pressure plate 203 and the pressure arm 302 is always a fixed value regardless of the processing state, the processing is stable, the grinding efficiency is high, the grinding belt 304 can be subjected to rapid and automatic grinding processing operation on cylindrical castings with different diameters, the driving mechanism realizes the grinding action of the grinding belt 304 in a circulating manner, and the driving rod 306 can be rotated after the driving motor 305 is electrified.When the driving gear 3011 rotates, the positioning pulley 303 can be driven to rotate through the grinding gear 3031, so that under the cooperation of the grinding belt 304 and the four positioning pulleys 303, the grinding belt 304 can move in a loop and realize grinding operation on the outer surface of the cylindrical casting.

Claims

1. A casting grinding machine based on subtractive manufacturing equipment, comprising: The machine tool assembly (1) includes a mounting platform (101), a reciprocating seat (102), a positioning push rod (103), and a three-jaw chuck (104). The reciprocating seat (102) is inserted into the top of the mounting platform (101), and the positioning push rod (103) is fixedly installed on the side of the reciprocating seat (102). The three-jaw chuck (104) is rotatably connected to the top of the mounting platform (101). The machine tool assembly is characterized by further including a grinding assembly, which is composed of a pressure mechanism (2) and a grinding mechanism (3). The pressure mechanism (2) includes a mounting base (201), a positioning plate (202), a pressure plate (203), a synchronizing rod (204), and an electric push rod (205). The mounting base (201) is fixedly installed on one end of the push rod of the positioning push rod (103). The positioning plate (202) is inserted into the interior of the mounting base (201) and is also fixedly installed on the bottom end of the push rod of the electric push rod (205). The pressure plate (203) is inserted into the interior of the mounting base (201), and the synchronizing rod (204) is rotatably connected to the interior of the mounting base (201). An electric push rod (205) is fixedly installed on the top of the mounting base (201); the grinding mechanism (3) includes a drive arm (301), a pressure arm (302), a positioning pulley (303) and a grinding belt (304). The drive arm (301) is inserted into the top of the mounting base (201), and the pressure arm (302) is inserted into the bottom of the mounting base (201). Two positioning pulleys (303) are rotatably connected to both the drive arm (301) and the pressure arm (302), and the grinding belt (304) is installed on the outside of the four positioning pulleys (303). The synchronous rod (204) has a spiral synchronous groove (2041) on the outside of the rod body. The synchronous groove (2041) has two sections, and the two sections of synchronous groove (2041) are symmetrically arranged on both sides of the synchronous rod (204). Both the drive arm (301) and the pressure arm (302) are provided with a synchronization protrusion (3021), and the synchronization protrusion (3021) of the drive arm (301) and the pressure arm (302) are respectively inserted into the two synchronization grooves (2041) outside the synchronization rod (204).

2. The casting grinding machine based on subtractive manufacturing equipment according to claim 1, characterized in that, The grinding mechanism (3) also includes a driving mechanism, which includes a driving motor (305) and a driving rod (306). The driving motor (305) is fixedly installed on the top of the mounting base (201), and the driving rod (306) is rotatably connected to the side of the mounting base (201). The shaft of the driving motor (305) and the top of the rod of the driving rod (306) are connected in a transmission connection.

3. The casting grinding machine based on subtractive manufacturing equipment according to claim 2, characterized in that, The drive arm (301) is provided with a drive gear (3011) on its side, and a grinding gear (3031) is provided on the outside of the shaft of one of the positioning pulleys (303) on the drive arm (301). The drive gear (3011) and the grinding gear (3031) mesh and drive each other.

4. The casting grinding machine based on subtractive manufacturing equipment according to claim 3, characterized in that, The drive gear (3011) has a drive groove (3012) inside, and the cross-sectional shape of the middle part of the drive rod (306) is a regular polygon. The rod part of the regular polygon cross-section of the drive rod (306) is inserted into the drive groove (3012).

5. The casting grinding machine based on subtractive manufacturing equipment according to claim 4, characterized in that, The bottom of the pressure plate (203) is provided with a functional top spring (2031), and the two ends of the functional top spring (2031) abut against the bottom of the pressure plate (203) and the outside of the pressure arm (302), respectively.

6. The casting grinding machine based on subtractive manufacturing equipment according to claim 5, characterized in that, The pressure plate (203) is provided with a positioning screw (2032) at the top, and the positioning screw (2032) is screwed to the bottom of the positioning plate (202) by the screw thread of the rod body.

7. The casting grinding machine based on subtractive manufacturing equipment according to claim 6, characterized in that, The pressure mechanism (2) also includes a displacement sensor (206), which is fixedly installed at the bottom of the mounting base (201).

8. The casting grinding machine based on subtractive manufacturing equipment according to claim 7, characterized in that, The displacement sensor (206) can monitor the position information of the pressure arm (302) inside the mounting base (201).

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