A rough grinding device for resin sand castings

Abstract

This invention discloses a rough grinding device for resin sand castings, relating to the technical field of grinding devices. The invention includes a processing table, with a positioning device for fixing tubular resin sand hardware fittings on the front top of the processing table, and an adaptation device on the rear top of the processing table. The adaptation device includes an elastic telescopic plate, with its fixed end fixed to the top of the processing table, and a rotating roller rotatably mounted on the top of the fixed end of the elastic telescopic plate. Through the adaptation device, the threaded rod, push plate, processing table, and elastic telescopic rod work together to drive the abrasive roller against the tubular resin sand hardware fitting, thereby ensuring the abrasive belt is tightly against the outer wall of the tubular resin sand hardware fitting. The elastic telescopic rod allows the abrasive roller to adaptively adjust the abrasive belt according to the different diameters of the tubular resin sand hardware fitting, ensuring that the abrasive belt always maintains a tight fit against the outer wall of the fitting.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a coarse grinding device for resin sand castings. Background Technology

[0002] The coarse grinding device for resin sand castings is a specialized piece of equipment for surface treatment of castings. It is primarily used to remove burrs, loose sand, and irregular surfaces generated during the casting process. It typically uses rotating grinding discs, grinding wheels, and other tools, combined with appropriate grinding force, to quickly smooth the casting surface and improve the quality of subsequent processing. This equipment is suitable for castings of various shapes and materials, effectively improving production efficiency and the appearance quality of castings.

[0003] Chinese patent CN221621742U discloses a coarse grinding device for resin sand castings, including a dust cover. A main board is fixedly connected to the inner top wall of the dust cover. A motor is fixedly connected to one side of the top of the main board. A rotating shaft is fixedly connected to the output end of the motor. The rotating shaft is rotatably connected to the top of the main board. A first rectangular array of bevel gears is fixedly connected to the outer wall of the rotating shaft. A second rectangular array of bevel gears is rotatably connected to the top of the main board, and the second bevel gears mesh with the first bevel gears. Multiple annular arrays of slide rails are fixedly connected to the bottom of the main board, and a rotating plate is fixedly connected to the bottom of the second bevel gears. In this patent, the rotation of the rotating plate pulls a transmission rod, which in turn pulls a slider, thereby clamping the resin sand casting. This solves the problem of not being able to grind multiple resin sand castings simultaneously, improving the production rate of resin sand castings.

[0004] However, the current coarse grinding device has the following problems: although the coarse grinding device can grind multiple resin sand castings, it is not convenient to adapt to grinding tubular resin sand hardware parts of different sizes. Therefore, we propose a coarse grinding device for resin sand castings. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a coarse grinding device for resin sand castings, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rough grinding device for resin sand castings, comprising a processing table, a positioning device for fixing tubular resin sand hardware fittings is provided on the front top of the processing table, the positioning device includes a placement plate fixed to the top of the processing table, a placement disc is rotatably mounted on the top of the placement plate at uniform and equidistant intervals, the placement disc is driven by a servo motor and fixed to the bottom of the processing table, a sliding groove is provided on the top of the placement disc, a bidirectional screw is rotatably mounted inside the sliding groove of the placement disc, clamps are threaded to both sides of the outer wall of the bidirectional screw, and the clamps are slidably mounted inside the sliding groove of the placement disc, an adaptation device is provided on the rear top of the processing table, the adaptation device includes an elastic telescopic plate, the fixed end of the elastic telescopic plate is fixed to the top of the processing table, a rotating roller is rotatably mounted on the top of the fixed end of the elastic telescopic plate, and the rotating roller is driven by a motor, the elastic telescopic plate... A second rotating roller is rotatably mounted on the top of the telescopic end of the machine. A sanding belt is connected between the outer walls of the first and second rotating rollers. A through groove is opened on the rear side of the top of the machine table. A threaded rod is rotatably mounted inside the through groove of the machine table. A push plate is threadedly connected to the outside of the threaded rod, and the push plate is slidably mounted inside the through groove of the machine table. Several elastic telescopic rods are fixed on the front side of the push plate. Each elastic telescopic rod has an abutment roller fixed on its top front side. The abutment roller contacts the inner wall of the front side of the sanding belt. Two of the abutment rollers are grouped together, and there is a 10-centimeter gap between the two abutment rollers in each group. The threaded rod drives the push plate to move forward along the inside of the through groove of the machine table. The push plate pushes the elastic telescopic rods to drive the abutment rollers to press against the sanding belt and move towards the tubular resin sanding hardware until the sanding belt is tightly against the outer wall of the tubular resin sanding hardware. The elastic telescopic rods enable the abutment rollers to drive the sanding belt to adaptively adjust according to the different diameters of the tubular resin sanding hardware.

[0007] According to the above technical solution, a wetting device is provided on the front side of the sanding belt. The wetting device includes a U-shaped frame, which is fixed to the top of the processing table. A water tank is fixed to one side of the top of the U-shaped frame, and a pump is fixed to the top of the water tank. A straight pipe is fixed to the outlet end of the pump. Three elastic telescopic rods are evenly and equidistantly fixed to the top of the U-shaped frame. A through-hole roller is rotatably installed at the bottom front side of the telescopic end of each of the three elastic telescopic rods. A water injection plate is rotatably installed on the top of the through-hole roller, and the water injection plate... The water tray and the straight pipe are connected by a flexible hose. After the tubular resin sand hardware is placed on top of the three placement trays, under the elastic force of the second elastic telescopic rod, the second elastic telescopic rod will always push the through-hole roller against the outer wall of the tubular resin sand hardware. When the grinding operation begins, the operator starts the pump. The pump draws water from the water tank and transmits it to the water injection tray through the straight pipe and the flexible hose. The water injection tray injects water into the through-hole roller, and the through holes of the through-hole roller spray water onto the surface of the sanding belt and the tubular resin sand hardware.

[0008] According to the above technical solution, a semi-arc plate is fixed at the bottom front side of the telescopic end of the second elastic telescopic rod. The semi-arc plate is located behind the through-hole roller. The semi-arc plate and the through-hole roller are concentrically arranged. An opening is provided on the side of the semi-arc plate near the sand belt. At the same time, the semi-arc plate will form a shield at the through-hole roller. The opening of the semi-arc plate avoids the problem of water sprayed from the through-hole roller being blocked by the semi-arc plate.

[0009] According to the above technical solution, a resistance ring is fixed on the upper outer wall of the through-hole roller, the inner wall of the semi-arc plate is rough, the outer wall of the resistance ring is in contact with the inner wall of the semi-arc plate, and the outer wall of the through-hole roller is smooth. Since the surface of the unpolished tubular resin sand hardware is relatively rough, the through-hole roller will rotate when the tubular resin sand hardware rotates, thus causing the through-hole roller to spray water in a rotating manner. When the through-hole roller rotates, it will also drive the resistance ring to rotate. At this time, the rotational force of the through-hole roller driving the resistance ring is greater than the frictional resistance between the resistance ring and the semi-arc plate. When the surface of the tubular resin sand hardware is polished smooth, the frictional force between the tubular resin sand hardware and the through-hole roller becomes smaller. At this time, the rotational force of the resistance ring is less than the frictional resistance between the resistance ring and the semi-arc plate, and the semi-arc plate restricts the rotation of the through-hole roller through the resistance ring.

[0010] According to the above technical solution, an adsorption device is provided below the U-shaped frame. The adsorption device includes a rotating rod and a squeezing cylinder. The rotating rod is rotatably installed on the top of the inner wall of the U-shaped frame. A sponge roller is fixed to the outside of the rotating rod, and a friction wheel is fixed to the bottom of the rotating rod. The squeezing cylinder is fixed to the top of the inner wall of the U-shaped frame. The squeezing cylinder is in contact with the outer wall of the sponge roller, and a water inlet is provided on the side of the squeezing cylinder near the sponge roller. The outer wall of the friction wheel is roughened, and the outer wall of the rotating roller is roughened. The outer wall of the friction wheel is in contact with the outer wall of the rotating roller. When the sanding belt with water adhering to it rotates to the position of the sponge roller, the sponge roller will adsorb the water on the surface of the sanding belt. At the same time, when the rotating roller rotates, under the action of the friction force between the rotating roller and the friction wheel, the rotating roller drives the friction wheel to rotate. The friction wheel drives the sponge roller to rotate, and the water inlet of the squeezing cylinder will squeeze the water adsorbed by the sponge roller into the squeezing cylinder, which will then discharge the water. This allows the sponge roller to continuously adsorb the water on the surface of the sanding belt.

[0011] This invention provides a coarse grinding device for resin sand castings. It has the following beneficial effects:

[0012] (1) The present invention, through the setting of the adaptation device, enables the threaded rod, push plate, processing table and elastic telescopic rod to work together to drive the abrasive roller to press against the abrasive belt and move towards the tubular resin abrasive hardware fitting, so that the abrasive belt is tightly attached to the outer wall of the tubular resin abrasive hardware fitting. The elastic telescopic rod enables the abrasive roller to drive the abrasive belt to adaptively adjust according to the different diameters of the tubular resin abrasive hardware fitting, thereby ensuring that the abrasive belt can always be tightly attached to the outer wall of the fitting. This helps to improve the flexibility and adaptability of the grinding process, and is suitable for fittings of various sizes. In addition, the elastic telescopic rod provides a uniform pressure distribution, so that the abrasive roller can push the abrasive belt evenly to the outer wall of the fitting. This uniform pressure can ensure that the friction between the abrasive belt and the surface of the fitting is balanced, thereby achieving a smoother and more consistent grinding effect and avoiding local over-grinding or uneven surface during the grinding process.

[0013] (2) This invention, through the setting of a wetting device, enables the placement tray, elastic telescopic rod II, through-hole roller, pump, water tank, straight pipe, and water injection tray to work together to drive the through-hole roller to spray water onto the surface of the sanding belt and tubular resin sand hardware accessories. The water can effectively remove the heat generated by friction, prevent overheating from causing surface damage or material changes, maintain the stability of the tubular resin sand hardware accessories and sanding belt, and the water helps to reduce the friction between the sanding belt and the surface of the pipe, effectively slowing down wear and making the contact between the sanding belt and the surface of the pipe more uniform; at the same time, the semi-arc plate forms a shield at the through-hole roller, thereby The semi-circular plate design avoids the problem of water splashing everywhere from the through-hole roller. It also prevents the water from being blocked by the semi-circular plate, ensuring that the through-hole roller effectively sprays water onto the sanding belt. Once the surface of the tubular resin sand hardware is smoothed, the friction between the tubular resin sand hardware and the through-hole roller decreases. At this point, the rotational force of the resistance ring is less than the frictional resistance between the resistance ring and the semi-circular plate. The semi-circular plate restricts the rotation of the through-hole roller through the resistance ring, allowing workers to judge the sanding progress of the tubular resin sand hardware by observing the rotation of the through-hole roller.

[0014] (3) The present invention uses an adsorption device to allow the sponge roller to adsorb the moisture on the surface of the sanding belt. At the same time, the rotating roller, the friction wheel and the sponge roller work together to squeeze the water adsorbed by the sponge roller into the extrusion cylinder through the water inlet hole of the extrusion cylinder. The extrusion cylinder will discharge the water, so that the sponge roller can continuously adsorb the moisture on the surface of the sanding belt. The sponge roller can continuously adsorb the moisture on the surface of the sanding belt, avoiding excessive moisture on the surface of the sanding belt, and also avoiding insufficient moisture that would affect the sanding effect. Maintaining appropriate moisture helps to optimize the working state of the sanding belt, thereby achieving a uniform sanding effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the entire invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the entire invention. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the adaptation device of the present invention. Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the adaptation device of the present invention. Figure 2 ;

[0019] Figure 5 This is a schematic diagram of the adaptation device of the present invention. Figure 3 ;

[0020] Figure 6 This is a schematic diagram of the positioning device of the present invention. Figure 1 ;

[0021] Figure 7 This is a schematic diagram of the positioning device of the present invention. Figure 2 ;

[0022] Figure 8 This is a schematic diagram of the wetting device of the present invention. Figure 1 ;

[0023] Figure 9 This is a schematic diagram of the wetting device of the present invention. Figure 2 ;

[0024] Figure 10 This is a schematic diagram of the adsorption device of the present invention.

[0025] In the diagram: 1. Processing table; 2. Positioning device; 21. Placement plate; 22. Placement tray; 23. Servo motor; 24. Bidirectional screw; 25. Clamping plate; 3. Adaptation device; 31. Elastic telescopic plate; 32. Rotary roller one; 33. Rotary roller two; 34. Sanding belt; 35. Contact roller; 36. Elastic telescopic rod one; 37. Push plate; 38. Threaded rod; 4. Wetting device; 41. U-shaped frame; 42. Elastic telescopic rod two; 43. Through-hole roller; 44. Water injection tray; 45. Straight pipe; 46. Pump; 47. Water tank; 48. Semi-arc plate; 49. Resistance ring; 5. Adsorption device; 51. Rotating rod; 52. Friction wheel; 53. Sponge roller; 54. Extrusion cylinder. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Please see Figures 1-10One embodiment of the present invention is: a rough grinding device for resin sand castings, including a processing table 1. A positioning device 2 for fixing tubular resin sand hardware fittings is provided on the front top of the processing table 1. The positioning device 2 includes a placement plate 21, which is fixed to the top of the processing table 1. A placement disk 22 is rotatably mounted on the top of the placement plate 21 at uniform and equidistant intervals. The placement disk 22 is driven by a servo motor 23, which is fixed to the bottom of the processing table 1. A groove is provided on the top of the placement disk 22, and a bidirectional screw 24 is rotatably mounted inside the groove. Both sides of the outer wall are threaded with clamping plates 25, which are slidably installed inside the grooves of the placement tray 22. An adaptation device 3 is provided on the rear top of the processing table 1. The adaptation device 3 includes an elastic telescopic plate 31. The fixed end of the elastic telescopic plate 31 is fixed to the top of the processing table 1. A first rotating roller 32 is rotatably mounted on the top of the fixed end of the elastic telescopic plate 31, and the first rotating roller 32 is driven by a motor. A second rotating roller 33 is rotatably mounted on the top of the telescopic end of the elastic telescopic plate 31. A sanding belt 34 is connected between the outer walls of the first rotating roller 32 and the second rotating roller 33. A through groove is provided on the rear top of the processing table 1 for processing... A threaded rod 38 is rotatably installed inside the through groove of the processing table 1. A push plate 37 is threadedly connected to the outside of the threaded rod 38, and the push plate 37 is slidably installed inside the through groove of the processing table 1. Several elastic telescopic rods 36 are fixed to the front side of the push plate 37. Each elastic telescopic rod 36 has an abutment roller 35 fixed to its top front side. The abutment roller 35 contacts the inner front wall of the sanding belt 34. Two abutment rollers 35 form a group, and there is a 10-centimeter gap between the two abutment rollers 35 in each group. Through the above structure, the elastic telescopic rods 36 and the abutment rollers 35 can drive the sanding belt 34. The sanding belt 34 is adaptively adjusted according to the different diameters of the tubular resin sanding hardware fittings, ensuring that it always fits tightly against the outer wall of the fitting. This helps to improve the flexibility and adaptability of the sanding process, making it suitable for fittings of various sizes. The elastic telescopic rod 36 provides a uniform pressure distribution, allowing the contact roller 35 to push the sanding belt 34 evenly against the outer wall of the fitting. This uniform pressure ensures that the friction between the sanding belt 34 and the surface of the fitting is balanced, resulting in a smoother and more consistent sanding effect and avoiding localized over-sanding or uneven surface during the sanding process.

[0028] A wetting device 4 is provided on the front side of the sanding belt 34. The wetting device 4 includes a U-shaped frame 41, which is fixed to the top of the processing table 1. A water tank 47 is fixed to one side of the top of the U-shaped frame 41, and a pump 46 is fixed to the top of the water tank 47. A straight pipe 45 is fixed to the water outlet end of the pump 46. Three elastic telescopic rods 42 are evenly and equidistantly fixed to the top of the U-shaped frame 41. A through-hole roller 43 is rotatably installed on the bottom front side of the telescopic end of each of the three elastic telescopic rods 42. A water injection plate is rotatably installed on the top of the through-hole roller 43. 44, and the water injection pan 44 is connected to the straight pipe 45 by a hose. With the above structure, the through holes of the through roller 43 spray water onto the surface of the sanding belt 34 and the tubular resin sand hardware. The water can effectively remove the heat generated by friction, prevent overheating from causing surface damage or material changes, maintain the stability of the tubular resin sand hardware and the sanding belt 34, and the water helps to reduce the friction between the sanding belt 34 and the surface of the pipe, which can effectively slow down wear and make the contact between the sanding belt 34 and the surface of the pipe more uniform.

[0029] A semi-circular plate 48 is fixed to the bottom front side of the telescopic end of the elastic telescopic rod 42. The semi-circular plate 48 is located behind the through-hole roller 43 and is concentric with the through-hole roller 43. An opening is provided on the side of the semi-circular plate 48 near the sanding belt 34. Through the above structure, the semi-circular plate 48 forms a shield at the through-hole roller 43, thereby avoiding the problem of water sprayed from the through-hole roller 43 splashing everywhere. The opening of the semi-circular plate 48 avoids the problem of water sprayed from the through-hole roller 43 being blocked by the semi-circular plate 48, thereby ensuring that the through-hole roller 43 effectively sprays water onto the sanding belt 34.

[0030] A resistance ring 49 is fixed on the upper outer wall of the through-hole roller 43. The inner wall of the semi-arc plate 48 is rough, and the outer wall of the resistance ring 49 is in contact with the inner wall of the semi-arc plate 48. The outer wall of the through-hole roller 43 is smooth. With the above structure, when the surface of the tubular resin sand hardware is polished smooth, the friction between the tubular resin sand hardware and the through-hole roller 43 becomes smaller. At this time, the rotational force of the resistance ring 49 is less than the frictional resistance between the resistance ring 49 and the semi-arc plate 48. The semi-arc plate 48 restricts the rotation of the through-hole roller 43 through the resistance ring 49, so that the operator can judge the polishing status of the tubular resin sand hardware by observing the rotation of the through-hole roller 43.

[0031] In use, the tubular resin sand hardware parts to be polished are placed on top of the three placement trays 22. The operator manually rotates the double-ended screw 24, which moves the clamping plate 25 away from the center of the placement tray 22. The clamping plate 25 abuts against the inner wall of the tubular resin sand hardware parts, thus fixing the tubular resin sand hardware parts to the top of the placement tray 22. Next, the operator manually rotates the threaded rod 38, which moves the push plate 37 forward along the through groove of the processing table 1. The push plate 37 pushes the elastic telescopic rod 36, which drives the contact roller 35 to press against the sanding belt 34 against the tubular resin sand hardware parts until the sanding belt 34 is in close contact with the outer wall of the tubular resin sand hardware parts. The elastic telescopic rod 36 enables the contact roller 35 to drive the sanding belt 34 to move forward. The abrasive belt 34 is adaptively adjusted according to the different diameters of the tubular resin abrasive hardware fittings, ensuring that it always fits tightly against the outer wall of the fitting. This helps to improve the flexibility and adaptability of the grinding process, making it suitable for fittings of various sizes. The elastic telescopic rod 36 provides a uniform pressure distribution, allowing the contact roller 35 to push the abrasive belt 34 evenly against the outer wall of the fitting. This uniform pressure ensures that the friction between the abrasive belt 34 and the surface of the fitting is balanced, resulting in a smoother and more consistent grinding effect. This avoids local over-grinding or uneven surface during the grinding process. Finally, the servo motor 23 is started, which drives the tubular resin abrasive hardware fittings to rotate through the placement plate 22. At this time, the grinding operation of the tubular resin abrasive hardware fittings can be carried out.

[0032] It should be noted that during the process of the contact roller 35 pressing against the sanding belt 34 and moving towards the tubular resin sand hardware, the sanding belt 34 will carry the rotating roller 33 to squeeze the telescopic end of the elastic telescopic plate 31.

[0033] After the tubular resin sand hardware fittings are placed on top of the three placement trays 22, under the elastic force of the second elastic telescopic rod 42, the second elastic telescopic rod 42 will always push the through-hole roller 43 against the outer wall of the tubular resin sand hardware fittings. When the grinding operation begins, the operator starts the pump 46. The pump 46 draws water from the water tank 47 and transmits it to the water injection tray 44 through the straight pipe 45 and the hose. The water injection tray 44 injects water into the through-hole roller 43, and the through holes of the through-hole roller 43 spray water onto the sanding belt. On the surface of the tubular resin sand hardware fittings 34 and the sanding belt 34, water effectively carries away the heat generated by friction, preventing overheating from causing surface damage or material changes, maintaining the stability of the tubular resin sand hardware fittings and the sanding belt 34. Furthermore, the moisture helps reduce friction between the sanding belt 34 and the fitting surface, effectively slowing down wear and making the contact between the sanding belt 34 and the fitting surface more uniform. Simultaneously, the semi-circular plate 48 forms a shield at the through-hole roller 43, thus preventing the water sprayed from the through-hole roller 43 from splashing everywhere. The through-hole design of plate 48 prevents the water sprayed from the through-hole roller 43 from being blocked by the semi-arc plate 48, thus ensuring that the through-hole roller 43 effectively sprays water onto the sanding belt 34. Since the surface of the unpolished tubular resin sand hardware is relatively rough, the rotation of the tubular resin sand hardware will drive the through-hole roller 43 to rotate, thus causing the through-hole roller 43 to spray water in a rotating manner. When the through-hole roller 43 rotates, it will also drive the resistance ring 49 to rotate. At this time, the rotational force of the through-hole roller 43 driving the resistance ring 49 is greater than the frictional resistance between the resistance ring 49 and the semi-arc plate 48. When the surface of the tubular resin sand hardware is polished smooth, the friction between the tubular resin sand hardware and the through-hole roller 43 becomes smaller. At this time, the rotational force of the resistance ring 49 is less than the frictional resistance between the resistance ring 49 and the semi-arc plate 48. The semi-arc plate 48 restricts the rotation of the through-hole roller 43 through the resistance ring 49, so that the workers can judge the polishing status of the tubular resin sand hardware by observing the rotation of the through-hole roller 43.

[0034] Please see Figures 1-10Based on the above embodiments, in another embodiment of the present invention, an adsorption device 5 is provided below the U-shaped frame 41. The adsorption device 5 includes a rotating rod 51 and a squeezing cylinder 54. The rotating rod 51 is rotatably mounted on the top of the inner wall of the U-shaped frame 41. A sponge roller 53 is fixed to the outside of the rotating rod 51, and a friction wheel 52 is fixed to the bottom of the rotating rod 51. The squeezing cylinder 54 is fixed to the top of the inner wall of the U-shaped frame 41. The squeezing cylinder 54 is in contact with the outer wall of the sponge roller 53, and a water inlet is provided on the side of the squeezing cylinder 54 near the sponge roller 53. The outer wall of the friction wheel 52 is rough, and the outer wall of the rotating roller 52 is also rough. With the surface arrangement, the outer wall of the friction wheel 52 contacts the outer wall of the rotating roller 32. Through the above structure, the water inlet of the extrusion cylinder 54 will squeeze the water adsorbed by the sponge roller 53 into the extrusion cylinder 54, and the extrusion cylinder 54 will discharge it. This allows the sponge roller 53 to continuously adsorb the moisture on the surface of the sanding belt 34. The sponge roller 53 can continuously adsorb the moisture on the surface of the sanding belt 34, avoiding excessive moisture on the surface of the sanding belt 34, and also avoiding insufficient moisture that would affect the sanding effect. Maintaining appropriate moisture helps to optimize the working state of the sanding belt 34, thereby achieving a uniform sanding effect.

[0035] During use, when the sanding belt 34 with water adhering to it rotates to the position of the sponge roller 53, the sponge roller 53 absorbs the moisture on the surface of the sanding belt 34. At the same time, when the rotating roller 32 rotates, under the action of friction between the rotating roller 32 and the friction wheel 52, the rotating roller 32 drives the friction wheel 52 to rotate, and the friction wheel 52 drives the sponge roller 53 to rotate. The water inlet hole of the extrusion cylinder 54 squeezes the water absorbed by the sponge roller 53 into the extrusion cylinder 54, and the extrusion cylinder 54 discharges it. This allows the sponge roller 53 to continuously absorb the moisture on the surface of the sanding belt 34. The sponge roller 53 can continuously absorb the moisture on the surface of the sanding belt 34, avoiding excessive wetness due to too much moisture, and also avoiding insufficient moisture which would affect the sanding effect. Maintaining appropriate moisture helps to optimize the working state of the sanding belt 34, thereby achieving a uniform sanding effect.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rough grinding device for resin sand castings, comprising a processing table (1), characterized in that: The processing table (1) has a positioning device (2) for fixing tubular resin sand hardware fittings on its top front side, and an adaptation device (3) is provided on its top rear side. The adaptation device (3) includes an elastic telescopic plate (31). The fixed end of the elastic telescopic plate (31) is fixed to the top of the processing table (1). A rotating roller (32) is rotatably installed on the top of the fixed end of the elastic telescopic plate (31), and the rotating roller (32) is driven by a motor. A rotating roller (33) is rotatably installed on the top of the telescopic end of the elastic telescopic plate (31). The rotating roller (32) and the rotating roller (33) are connected. A sanding belt (34) is connected between the outer walls of (33). A through groove is provided on the rear side of the top of the processing table (1). A threaded rod (38) is rotatably installed inside the through groove of the processing table (1). A push plate (37) is threadedly connected to the outside of the threaded rod (38). The push plate (37) is slidably installed inside the through groove of the processing table (1). Several elastic telescopic rods (36) are fixed on the front side of the push plate (37). A contact roller (35) is fixed on the top of the front side of several elastic telescopic rods (36). The contact roller (35) is in contact with the inner wall of the front side of the sanding belt (34). A wetting device (4) is provided on the front side of the sanding belt (34). The wetting device (4) includes a U-shaped frame (41). The U-shaped frame (41) is fixed on the top of the processing table (1). A water tank (47) is fixed on one side of the top of the U-shaped frame (41). A pump (46) is fixed on the top of the water tank (47). A straight pipe (45) is fixed at the outlet end of the pump (46). Three elastic telescopic rods (42) are evenly and equidistantly fixed on the top of the U-shaped frame (41). A through-hole roller (43) is rotatably installed on the bottom front side of the telescopic end of each of the three elastic telescopic rods (42). A water injection plate (4) is rotatably installed on the top of the through-hole roller (43). 4), and the water injection plate (44) and the straight pipe (45) are connected by a hose. A semi-arc plate (48) is fixed at the bottom front of the telescopic end of the elastic telescopic rod (42). The semi-arc plate (48) is located behind the through-hole roller (43). The semi-arc plate (48) and the through-hole roller (43) are concentrically arranged. An opening is provided on the side of the semi-arc plate (48) near the sand belt (34). A resistance ring (49) is fixed on the upper outer wall of the through-hole roller (43). The inner wall of the semi-arc plate (48) is rough. The outer wall of the resistance ring (49) is in contact with the inner wall of the semi-arc plate (48). The outer wall of the through-hole roller (43) is smooth.

2. The coarse grinding device for resin sand castings according to claim 1, characterized in that: Two of the aforementioned contact rollers (35) are grouped together, and a 10-centimeter gap is left between the two contact rollers (35) in each group.

3. The coarse grinding device for resin sand castings according to claim 1, characterized in that: The positioning device (2) includes a placement plate (21), which is fixed on the top of the processing table (1). A placement disk (22) is evenly and equidistantly mounted on the top of the placement plate (21). The placement disk (22) is driven by a servo motor (23), which is fixed on the bottom of the processing table (1). A sliding groove is provided on the top of the placement disk (22). A bidirectional screw (24) is rotatably mounted inside the sliding groove of the placement disk (22). Both sides of the outer wall of the bidirectional screw (24) are threaded with clamps (25), and the clamps (25) are slidably mounted inside the sliding groove of the placement disk (22).

4. The coarse grinding device for resin sand castings according to claim 1, characterized in that: An adsorption device (5) is provided below the U-shaped frame (41). The adsorption device (5) includes a rotating rod (51) and a squeezing cylinder (54). The rotating rod (51) is rotatably installed on the top of the inner wall of the U-shaped frame (41). A sponge roller (53) is fixed to the outside of the rotating rod (51). A friction wheel (52) is fixed to the bottom of the rotating rod (51). The squeezing cylinder (54) is fixed to the top of the inner wall of the U-shaped frame (41). The squeezing cylinder (54) is in contact with the outer wall of the sponge roller (53), and a water inlet hole is opened on the side of the squeezing cylinder (54) near the sponge roller (53).

5. The coarse grinding device for resin sand castings according to claim 4, characterized in that: The outer wall of the friction wheel (52) is rough, the outer wall of the first roller (32) is rough, and the outer wall of the friction wheel (52) is in contact with the outer wall of the first roller (32).

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