Noise reduction type metal casting grinding machine

Abstract

The invention relates to the related technical field of machining, in particular to a noise reduction type metal casting grinding machine which comprises a table plate, a surrounding plate is fixedly connected to the surface of one side of the table plate, and a collecting opening is formed in the surface of one side of the table plate. Through the arrangement of the protection mechanism, the auxiliary shell is inserted into the inner side of the main shell along the groove to be preliminarily fixed, then the auxiliary shell is stably fixed through the sliding piece, the fixing spring and the connecting piece, the sliding piece moves along a main sliding way and an auxiliary sliding way formed in the main shell and the auxiliary shell, and meanwhile the fixing spring on the inner side of the connecting piece slightly expands to achieve the limiting effect on the main shell and the auxiliary shell; the splash-proof plate is arranged in the main shell and connected with the connecting piece through the buckle, the splash-proof plate can rotate along the center of the buckle and can also rotate along the connecting piece, free adjustment is carried out, the main shell and the auxiliary shell which are fixedly installed are tightly attached, and metal chippings and dust generated during high-speed operation of the grinding wheel can be effectively prevented from splashing; and a safe working environment is created for operators.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and particularly to a noise-reducing metal casting grinding machine. Background Art

[0002] In the field of machining technology, the machining of metal castings plays a decisive role in the quality and performance of products. The metal casting grinding machine is an essential key equipment in this process. The metal casting grinding machine mainly consists of a grinding wheel, a motor, a machine body, etc. It can finely grind the surface of metal castings, eliminate defects such as sand holes and air holes on the casting surface, and greatly improve the surface finish of the casting. When correcting the size of metal castings, the grinding machine can accurately control the machining allowance to ensure the dimensional accuracy of the casting. Therefore, there is a particular need for a noise-reducing metal casting grinding machine.

[0003] However, the existing metal casting grinding machines generally rely on a blower to achieve the dust reduction function. When the blower is running, it generates a huge amount of noise, seriously interfering with employee communication and causing hearing damage after long-term exposure. Moreover, the traditional grinding machine lacks relevant shock absorption mechanisms. When the grinding wheel rotates at high speed and rubs violently against the metal casting, the vibration is transmitted through the equipment structure, triggering strong noise, which not only affects the working environment but also reduces the stability and service life of the equipment. At the same time, the traditional splash guard has a simple structure and can only play a basic blocking role, making it difficult to handle complex scenarios in actual machining and seriously threatening the personal safety of the staff. Summary of the Invention

[0004] The purpose of the present invention is to provide a noise-reducing metal casting grinding machine to solve the problems in the above-mentioned background art, that is, the existing metal casting grinding machines generally rely on a blower to achieve the dust reduction function. When the blower is running, it generates a huge amount of noise, seriously interfering with employee communication and causing hearing damage after long-term exposure. Moreover, the traditional grinding machine lacks relevant shock absorption mechanisms. When the grinding wheel rotates at high speed and rubs violently against the metal casting, the vibration is transmitted through the equipment structure, triggering strong noise, which not only affects the working environment but also reduces the stability and service life of the equipment. At the same time, the traditional splash guard has a simple structure and can only play a basic blocking role, making it difficult to handle complex scenarios in actual machining and seriously threatening the personal safety of the staff.

[0005] To achieve the above object, the present invention provides the following technical solution: a noise-reducing metal casting grinder, including a table board, one side surface of the table board is fixedly connected with a surrounding board, a collection port is opened on one side surface of the table board, a drawer is slidably connected to the lower surface of the table board, a spray head is slidably connected to one side surface of the table board, a water pipe is fixedly connected to the lower surface of the spray head, a water bucket is fixedly connected to one side surface of the water pipe, a protection mechanism is arranged on the upper surface of the table board, a shock-absorbing mechanism is arranged on the lower surface of the table board, and a support frame is fixedly connected to the lower surface of the table board; The protection mechanism includes a motor, a main housing, a main slideway, a groove, a grinding disc, an auxiliary housing, an auxiliary slideway, a sliding member, a fixing spring, a connecting member, a buckle, a connecting piece and a splash guard. A motor is fixedly connected to the upper surface of the table board, a main housing is fixedly connected to one side surface of the motor, a main slideway is opened on one side surface of the main housing, a groove is opened on one side surface of the main housing, a grinding disc is rotatably connected to one side surface of the main housing, an auxiliary housing is rotatably connected to one side surface of the grinding disc, an auxiliary slideway is opened on one side surface of the auxiliary housing, an auxiliary slideway is opened on one side surface of the auxiliary housing, a sliding member is slidably connected to the inner surface of the auxiliary slideway, a fixing spring is fixedly connected to one side surface of the sliding member, a connecting member is slidably connected to the outer surface of the fixing spring, a buckle is opened on one side surface of the connecting member, a connecting piece is slidably connected to the inner surface of the buckle, and a splash guard is rotatably connected to one side surface of the connecting piece.

[0006] Preferably, the inner wall size of the groove matches the outer wall size of the side of the auxiliary housing close to the motor, and the main housing and the auxiliary housing are parallelly distributed.

[0007] Preferably, the inner wall sizes of the main slideway and the auxiliary slideway are the same, and the main slideway and the auxiliary slideway are parallelly distributed.

[0008] Preferably, there are two main slideways with the same size, and they are symmetrically arranged around the side surface of the main housing close to the motor. There are two auxiliary slideways with the same size, and they are symmetrically arranged around the side surface of the auxiliary housing close to the motor.

[0009] Preferably, the outer wall size of the end of the sliding member close to the motor matches the main slideway and the auxiliary slideway, and the outer wall size of the fixing spring matches the inner wall size of the connecting member.

[0010] Preferably, the inner wall size of the buckle matches the outer wall size of the connecting piece, and there are four splash guards with the same size.

[0011] Preferably, the inner wall size of the drawer is larger than the inner wall size of the collection port, and the table board and the drawer are parallelly distributed.

[0012] Preferably, the shock absorption mechanism includes a cross beam, a damper, a shock absorption spring, a movable part, a movable rod, a sliding wheel, a sliding groove and a fixed rod. One side surface of the support frame is fixedly connected with the cross beam. One side surface of the cross beam is fixedly connected with the damper. The outer surface of the damper is slidably connected with the shock absorption spring. The upper surface of the shock absorption spring is slidably connected with the movable part. One side surface of the movable part is rotatably connected with the movable rod. The inner surface of the movable rod is rotatably connected with the sliding wheel. The outer surface of the sliding wheel is slidably connected with the fixed rod. One side surface of the fixed rod is provided with the sliding groove.

[0013] Preferably, there are two movable rods and sliding wheels with the same size, and they are symmetrically arranged along both sides of the movable part. There are two fixed rods with the same size, and they are symmetrically arranged along both sides of the movable part.

[0014] Preferably, the outer wall size of the sliding wheel is adapted to the inner wall size of the sliding groove. The horizontal center line of the fixed rod is perpendicularly crossed with the vertical center line of the support frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: for this noise-reducing metal casting grinder, through the setting of the protection mechanism, during use, the auxiliary shell is inserted into the inner side of the main shell along the groove for preliminary fixation, and then it is stably fixed by the sliding part, the fixed spring and the connecting part. The sliding part moves along the main slideway and the auxiliary slideway opened on the main shell and the auxiliary shell. At the same time, the fixed spring inside the connecting part will slightly expand to form a limiting effect on the main shell and the auxiliary shell. The two groups of sliding parts, fixed springs and connecting parts are symmetrically distributed up and down to play a full fixing role on the main shell and the auxiliary shell. Then, it is connected by the buckle and the connecting part, so that the splash guard can rotate along the center of the buckle, and at the same time, the splash guard can also rotate along the connecting part for free adjustment. After installation and fixation, the main shell and the auxiliary shell are closely attached, which can effectively block the metal chips and dust splashing generated during the high-speed operation of the grinding wheel, creating a safe working environment for the operator. At the same time, the freely adjustable splash guard can flexibly adjust the angle according to the processing requirements. Whether it is horizontal grinding or vertical polishing, it can accurately block the splashing objects, greatly reducing the risk of injury to the operator.

[0016] Through the setting of the shock-absorbing mechanism, during use, vibrations will be generated above the tabletop during the processing, and the shock sensation will be transmitted to the movable part, causing the movable rod to vibrate, driving the inner sliding wheel to slide restrictively along the sliding groove opened on the fixed rod. At the same time, the shock-absorbing spring moves, and the damper fixed to the crossbeam will restrict it, dispersing and damping the shock sensation. By effectively absorbing and dispersing vibrations, the shock-absorbing mechanism reduces the impact force borne by each component of the equipment. It reduces the wear of components such as the movable part, fixed rod, and shock-absorbing spring, and reduces the risk of fatigue damage to structural components such as the tabletop and crossbeam caused by long-term vibrations, thereby greatly extending the overall service life of the grinding wheel. At the same time, it significantly reduces the noise generated by vibrations, creating a quieter working environment for the operator.

[0017] Through the setting of the drawer, water pipe, water bucket, and nozzle, during use, the nozzle absorbs the water inside the water bucket through the water pipe for spraying. Through continuous spraying, water accumulates between the tabletop and the apron, and a large amount of accumulated water will drive small scraps to flow into the collection port together. The collection port is connected to the drawer, allowing the water and scraps to flow into the drawer for collection. By pulling the drawer, the coordinated treatment of waste water and scraps is completed. Compared with collecting dust by an exhaust fan, it effectively reduces the generation of noise. At the same time, during the spraying process, water can not only carry away the scraps but also play a cooling role, effectively reducing the temperature of metal castings and grinding wheels during processing, avoiding problems such as workpiece deformation and increased grinding wheel wear caused by overheating, thereby improving the processing accuracy and extending the service life of the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view structural schematic diagram of the present invention; Figure 2 is a rear view structural schematic diagram of the present invention; Figure 3 is a three-quarter side view structural schematic diagram of the present invention; Figure 4 is a side view structural schematic diagram of the present invention; Figure 5 is a partial disassembled structural schematic diagram of the present invention; Figure 6 is a structural schematic diagram of the shock-absorbing mechanism of the present invention; Figure 7 is a structural schematic diagram of the protection mechanism of the present invention; Figure 8 is a partial disassembled structural schematic diagram of the protection mechanism of the present invention.

[0019] In the figure: 1, table board; 2, enclosing board; 3, collection port; 4, drawer; 5, spray head; 6, water pipe; 7, water bucket; 8, protection mechanism; 801, motor; 802, main housing; 803, main slideway; 804, groove; 805, abrasive disc; 806, auxiliary housing; 807, auxiliary slideway; 808, sliding part; 809, fixing spring; 810, connecting part; 811, buckle; 812, connecting piece; 813, splash guard; 9, shock absorption mechanism; 901, cross beam; 902, damper; 903, shock absorption spring; 904, movable part; 905, movable rod; 906, sliding wheel; 907, sliding groove; 908, fixing rod; 10, support frame. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-8 , the present invention provides a technical solution: a noise-reducing metal casting grinding machine, including a table board 1, an enclosing board 2 is fixedly connected to one side surface of the table board 1, a collection port 3 is opened on one side surface of the table board 1, a drawer 4 is slidably connected to the lower surface of the table board 1, a spray head 5 is slidably connected to one side surface of the table board 1, a water pipe 6 is fixedly connected to the lower surface of the spray head 5, a water bucket 7 is fixedly connected to one side surface of the water pipe 6, a protection mechanism 8 is arranged on the upper surface of the table board 1, a shock absorption mechanism 9 is arranged on the lower surface of the table board 1, and a support frame 10 is fixedly connected to the lower surface of the table board 1; The protection mechanism 8 includes a motor 801, a main housing 802, a main slideway 803, a groove 804, a grinding disc 805, an auxiliary housing 806, an auxiliary slideway 807, a sliding member 808, a fixing spring 809, a connecting member 810, a buckle 811, a connecting piece 812 and a splash guard 813. The upper surface of the tabletop 1 is fixedly connected with the motor 801. One side surface of the motor 801 is fixedly connected with the main housing 802. One side surface of the main housing 802 is provided with the main slideway 803. One side surface of the main housing 802 is provided with the groove 804. One side surface of the main housing 802 is rotatably connected with the grinding disc 805. One side surface of the grinding disc 805 is rotatably connected with the auxiliary housing 806. One side surface of the auxiliary housing 806 is provided with the auxiliary slideway 807. The inner surface of the auxiliary slideway 807 is slidably connected with the sliding member 808. One side surface of the sliding member 808 is fixedly connected with the fixing spring 809. The outer surface of the fixing spring 809 is slidably connected with the connecting member 810. One side surface of the connecting member 810 is provided with the buckle 811. The inner surface of the buckle 811 is slidably connected with the connecting piece 812. One side surface of the connecting piece 812 is rotatably connected with the splash guard 813. Through the arrangement of the motor 801, the main housing 802, the main slideway 803, the groove 804, the grinding disc 805, the auxiliary housing 806, the auxiliary slideway 807, the sliding member 808, the fixing spring 809, the connecting member 810, the buckle 811, the connecting piece 812 and the splash guard 813, during use, the auxiliary housing 806 is inserted into the inner side of the main housing 802 along the groove 804 for preliminary fixation, and then it is stably fixed by the sliding member 808, the fixing spring 809 and the connecting member 810. The sliding member 808 moves along the main slideway 803 and the auxiliary slideway 807 opened on the main housing 802 and the auxiliary housing 806. At the same time, the fixing spring 809 inside the connecting member 810 will slightly expand to form a limiting effect on the main housing 802 and the auxiliary housing 806. The two groups of sliding members 808, fixing springs 809 and connecting members 810 are symmetrically distributed up and down to play a sufficient fixing role on the main housing 802 and the auxiliary housing 806. Then, it is connected through the buckle 811 and the connecting piece 812, so that the splash guard 813 can rotate at an angle along the center of the buckle 811, and at the same time, the splash guard 813 can also rotate along the connecting piece 812. The sliding members 808, fixing springs 809 and connecting members 810 that are symmetrically distributed up and down make the fixation of the main housing 802 and the auxiliary housing 806 not affected by the placement position or working direction of the grinding wheel, and always remain stable. The splash guard 813 that can rotate at multiple angles is suitable for various complex metal casting processing scenarios. Whether it is conventional plane grinding or processing tasks with special angle requirements, it can provide reliable protection for the processing personnel.

[0022] Furthermore, the inner wall dimensions of the groove 804 match the outer wall dimensions of one side of the auxiliary housing 806 close to the motor 801. The main housing 802 and the auxiliary housing 806 are parallelly distributed. With the settings of the groove 804, the main housing 802, and the auxiliary housing 806, during use, the main housing 802 semi-wraps the auxiliary housing 806 through the groove 804, making the main housing 802 and the auxiliary housing 806 closely fit. The matching of the groove and the auxiliary housing dimensions enables the main housing and the auxiliary housing to be accurately positioned after installation, avoiding shaking caused by position deviation. During the operation of the grinder, the stable structure reduces the collision and friction between components, not only reducing the failure rate and extending the service life of the equipment but also providing a stable foundation for the processing process.

[0023] Furthermore, the inner wall dimensions of the main slideway 803 and the auxiliary slideway 807 are the same, and the main slideway 803 and the auxiliary slideway 807 are parallelly distributed. With the settings of the main slideway 803 and the auxiliary slideway 807, during use, both ends of the slider 808 can move parallelly along the main slideway 803 and the auxiliary slideway 807. During the parallel movement of the slider 808, a uniform acting force on the main housing 802 and the auxiliary housing 806 is always maintained, reducing tilting or shaking caused by uneven force, effectively improving the overall stability of the protection mechanism 8. Even when the grinder is running at high speed, it can ensure the close combination of the main housing 802 and the auxiliary housing 806, providing a reliable guarantee for the safe operation of the equipment.

[0024] Furthermore, there are two main slideways 803 with the same dimensions, and they are symmetrically arranged around one side surface of the main housing 802 close to the motor 801. There are two auxiliary slideways 807 with the same dimensions, and they are symmetrically arranged around one side surface of the auxiliary housing 806 close to the motor 801. With the settings of the main slideway 803 and the auxiliary slideway 807, during use, the two groups of sliders 808, fixed springs 809, and connectors 810 are symmetrically distributed up and down, playing a sufficient fixing role for the main housing 802 and the auxiliary housing 806. The two groups of main slideways 803 and auxiliary slideways 807 and the sliders 808, fixed springs 809, and connectors 810 that are symmetrically distributed up and down provide balanced fixing forces for the main housing 802 and the auxiliary housing 806 from the upper and lower directions. When the grinder generates severe vibrations during high-speed operation, it can effectively prevent relative displacement between the main housing 802 and the auxiliary housing 806, maintain the integrity of the protection structure, and reduce the occurrence of safety accidents caused by protection failure.

[0025] Further, the outer wall dimension of one end of the sliding member 808 close to the motor 801 is matched with the main slideway 803 and the auxiliary slideway 807, and the outer wall dimension of the fixing spring 809 is matched with the inner wall dimension of the connecting member 810. Through the arrangement of the fixing spring 809 and the connecting member 810, during use, the connecting member 810 will restrict the fixing spring 809 to ensure that the fixing spring 809 can only be pulled at both ends, and the middle always remains horizontal. Since the middle of the fixing spring 809 always remains horizontal, it avoids local overstretching or extrusion of the fixing spring 809 due to uneven force. This not only reduces the possibility of fatigue fracture of the fixing spring 809, but also reduces the abnormal friction between the fixing spring 809 and the connecting member 810.

[0026] Further, the inner wall dimension of the buckle 811 is matched with the outer wall dimension of the connecting piece 812, and four splash guards 813 with the same size are provided. Through the arrangement of the buckle 811 and the connecting piece 812, during use, the connecting piece 812 is snapped into the buckle 811 to complete the fixation. At the same time, the connecting piece 812 can rotate inside the buckle 811, which is convenient for the operator to adjust the angle of the splash guard at any time according to the real-time processing state of the sanding disc 805 during the processing process to protect the safety of the operator.

[0027] Further, the inner wall dimension of the drawer 4 is larger than the inner wall dimension of the collection port 3, and the tabletop 1 and the drawer 4 are distributed in parallel. Through the arrangement of the drawer 4 and the collection port 3, during use, the water sprayed by the nozzle 5 will drive the fine waste to flow into the drawer 4 along the collection port 3. The inner wall dimension of the drawer 4 is larger than that of the collection port 3, enabling the water flow carrying the waste to smoothly flow into the drawer 4 and reducing the risk of waste accumulation and blockage at the collection port 3.

[0028] Furthermore, the shock absorbing mechanism 9 includes a crossbeam 901, a damper 902, a shock absorbing spring 903, a movable part 904, a movable rod 905, a sliding wheel 906, a sliding groove 907 and a fixed rod 908. The crossbeam 901 is fixedly connected to the surface of one side of the support frame 10, the damper 902 is fixedly connected to the surface of one side of the crossbeam 901, the shock absorbing spring 903 is slidably connected to the outer surface of the damper 902, the upper surface of the shock absorbing spring 903 is slidably connected to the movable part 904, the movable rod 905 is rotatably connected to the inner surface of the movable rod 905, and the sliding wheel 906 is rotatably connected to the outer surface of the sliding wheel 906. Rod 908, a sliding groove 907 is provided on one side surface of the fixed rod 908. Through the arrangement of the crossbeam 901, the damper 902, the shock-absorbing spring 903, the movable part 904, the movable rod 905, the sliding wheel 906, the sliding groove 907 and the fixed rod 908, when in use, the vibration will be transmitted to the movable part 904, and the movable rod 905 will vibrate, driving the inner sliding wheel 906 to limit the sliding along the sliding groove 907 provided on the fixed rod 908, and at the same time the shock-absorbing spring 903 moves, and the damper 902 fixed by the crossbeam 901 will limit it, so as to disperse the vibration and reduce the noise caused by the vibration, thereby improving the working environment of the operator.

[0029] Furthermore, two movable rods 905 and sliding wheels 906 are provided with the same size and are symmetrically arranged along the two sides of the movable part 904. Two fixed rods 908 are provided with the same size and are symmetrically arranged along the two sides of the movable part 904. Through the arrangement of the movable rod 905, the fixed rod 908 and the sliding wheel 906, when in use, the movable rod 905 will move and drive the sliding wheel 906 to move along the sliding groove 907 opened on the fixed rod 908. The two groups of symmetrically distributed movable rods 905, sliding wheels 906 and fixed rods 908 can evenly bear and disperse the vibration generated by the grinding machine from both sides. When the vibration is transmitted to the movable part, the symmetrical structures on both sides can move synchronously to avoid displacement or shaking caused by uneven force, thereby greatly enhancing the stability of the shock absorbing mechanism.

[0030] Furthermore, the outer wall size of the sliding wheel 906 is matched with the inner wall size of the sliding groove 907, and the horizontal center line of the fixing rod 908 is perpendicular to the vertical center line of the support frame 10. Through the setting of the sliding wheel 906 and the sliding groove 907, when in use, the sliding wheel 906 will slide along the sliding groove 907 to ensure that the sliding wheel 906 is always located in the sliding groove 907 during the shock absorption process, thereby reducing the occurrence of accidents caused by the detachment of the sliding wheel 906.

[0031] Working principle: First, start the motor 801 to drive the grinding disc 805 to rotate, so that the metal part contacts the surface of the grinding disc 805 for grinding to complete the processing. Before the processing, first insert the auxiliary shell 806 into the inside of the main shell 802 along the groove 804 for preliminary fixation, and then use the sliding part 808, the fixing spring 809 and the connecting part 810 to fix it stably. The sliding part 808 moves along the main slideway 803 and the auxiliary slideway 807 opened by the main shell 802 and the auxiliary shell 806. At the same time, the fixing spring 809 inside the connecting part 810 will slightly expand to form a limiting effect on the main shell 802 and the auxiliary shell 806. The two groups of sliding parts 808, fixing springs 809 and connecting parts 810 are symmetrically distributed up and down to play a sufficient fixing role on the main shell 802 and the auxiliary shell 806. Then connect through the buckle 811 and the connecting part 812, so that the splash-proof plate 813 can rotate at an angle along the center of the buckle 811, and at the same time the splash-proof plate 813 can also rotate along the connecting part 812 for free adjustment. Then, the shock absorption mechanism 9 weakens the vibration and noise during work. When starting the processing, vibration will be generated above the table board 1, and the vibration feeling will be transmitted to the movable part 904, and the movable rod 905 will be vibrated, driving the inner sliding wheel 906 to move along the sliding groove 907 opened by the fixed rod 908. At the same time, the shock absorption spring 903 moves, and the damper 902 fixed by the cross beam 901 will limit it to disperse and absorb the vibration feeling. During the processing, a large amount of fine waste will be generated. Connect the water pipe 6 to the water bucket 7 so that the nozzle 5 can spray the whole body. Continuous spraying makes the table board 1 and the surrounding board 2 form accumulated water. A large amount of accumulated water drives the waste to flow into the inside of the drawer 4 through the collection port 3 for collection. Pulling the drawer facilitates the subsequent processing. In this way, the use process of a noise-reducing metal casting grinder is completed.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing metal casting grinder, comprising a table board (1), characterized in that: One side surface of the tabletop (1) is fixedly connected with a surrounding plate (2). A collection port (3) is opened on one side surface of the tabletop (1). A drawer (4) is slidably connected to the lower surface of the tabletop (1). A spray head (5) is slidably connected to one side surface of the tabletop (1). A water pipe (6) is fixedly connected to the lower surface of the spray head (5). A water bucket (7) is fixedly connected to one side surface of the water pipe (6). A protection mechanism (8) is arranged on the upper surface of the tabletop (1). A shock absorption mechanism (9) is arranged on the lower surface of the tabletop (1). A support frame (10) is fixedly connected to the lower surface of the tabletop (1); The protection mechanism (8) includes a motor (801), a main housing (802), a main slideway (803), a groove (804), a sanding disc (805), a secondary housing (806), a secondary slideway (807), a sliding member (808), a fixing spring (809), a connecting member (810), a buckle (811), an adapter (812) and a splash guard (813). A motor (801) is fixedly connected to the upper surface of the tabletop (1). A main housing (802) is fixedly connected to one side surface of the motor (801). A main slideway (803) is opened on one side surface of the main housing (802). A groove (804) is opened on one side surface of the main housing (802). A sanding disc (805) is rotatably connected to one side surface of the main housing (802). A secondary housing (806) is rotatably connected to one side surface of the sanding disc (805). A secondary slideway (807) is opened on one side surface of the secondary housing (806). A sliding member (808) is slidably connected to the inner surface of the secondary slideway (807). A fixing spring (809) is fixedly connected to one side surface of the sliding member (808). A connecting member (810) is slidably connected to the outer surface of the fixing spring (809). A buckle (811) is opened on one side surface of the connecting member (810). An adapter (812) is slidably connected to the inner surface of the buckle (811). A splash guard (813) is rotatably connected to one side surface of the adapter (812).

2. The noise reduction type metal casting grinder according to claim 1, wherein: The inner wall size of the groove (804) is identical to the outer wall size of the side of the secondary housing (806) close to the motor (801). The main housing (802) and the secondary housing (806) are distributed in parallel.

3. The noise reduction type metal casting grinder according to claim 1, wherein: The inner wall sizes of the main slideway (803) and the secondary slideway (807) are the same. The main slideway (803) and the secondary slideway (807) are distributed in parallel.

4. A noise-reducing metal casting grinder according to claim 1, characterized in that: There are two main slideways (803) with the same size, and they are symmetrically arranged around the side surface of the main housing (802) close to the motor (801). There are two secondary slideways (807) with the same size, and they are symmetrically arranged around the side surface of the secondary housing (806) close to the motor (801).

5. The noise-reducing metal casting grinder according to claim 1, characterized in that: The outer wall dimension of one end of the slider (808) close to the motor (801) is adapted to the main slideway (803) and the auxiliary slideway (807), and the outer wall dimension of the fixing spring (809) is adapted to the inner wall dimension of the connecting piece (810).

6. The noise reduction type metal casting grinder according to claim 1, characterized in that: The inner wall dimension of the buckle (811) is adapted to the outer wall dimension of the connecting piece (812), and there are four splash-proof plates (813) with the same dimension.

7. A noise reduction type metal casting grinder according to claim 1, characterized in that: The inner wall dimension of the drawer (4) is larger than that of the collection port (3), and the table board (1) and the drawer (4) are distributed in parallel.

8. The noise reduction type metal casting grinder according to claim 1, wherein: The shock absorption mechanism (9) includes a cross beam (901), a damper (902), a shock absorption spring (903), a movable part (904), a movable rod (905), a sliding wheel (906), a sliding groove (907) and a fixed rod (908). One side surface of the support frame (10) is fixedly connected with the cross beam (901), one side surface of the cross beam (901) is fixedly connected with the damper (902), the outer side surface of the damper (902) is slidably connected with the shock absorption spring (903), the upper surface of the shock absorption spring (903) is slidably connected with the movable part (904), one side surface of the movable part (904) is rotatably connected with the movable rod (905), the inner side surface of the movable rod (905) is rotatably connected with the sliding wheel (906), the outer side surface of the sliding wheel (906) is slidably connected with the fixed rod (908), and a sliding groove (907) is formed on one side surface of the fixed rod (908).

9. The noise reduction type metal casting grinder according to claim 8, wherein: There are two movable rods (905) and sliding wheels (906) with the same dimension, and they are symmetrically arranged along both sides of the movable part (904). There are two fixed rods (908) with the same dimension, and they are symmetrically arranged along both sides of the movable part (904).

10. A noise-reducing type metal casting grinder according to claim 8, characterized in that: The outer wall dimension of the sliding wheel (906) is adapted to the inner wall dimension of the sliding groove (907), and the horizontal center line of the fixed rod (908) is vertically crossed with the vertical center line of the support frame (10).

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