Automatic grinding device for circular castings

Abstract

The present invention relates to the technical field of casting grinding, and in particular to an automatic grinding device for circular castings. Its technical solution includes: a grinding assembly, including a position adjustment member, an extension block, a back plate, a flow chamber, a closed door and a folding rod, wherein the position adjustment member is arranged in the middle of an assembly line frame, an extension block is arranged in the middle of the position adjustment member, a flow chamber is provided on the inner wall of the extension block, the cross section of the flow chamber is L-shaped, and the closed door is rotatably connected at the inner wall corner of the extension block. In the present invention, when grinding a circular casting, the larger the diameter of the circular casting, the farther the second slider is from the axis of the circular casting, the back plate is unfolded by the folding rod, the discharge port of the grinding and polishing liquid is reduced, and the flow rate of the grinding and polishing liquid is accelerated. Moreover, since the area of ​​the grinding and polishing liquid actually in contact with the circular casting is fixed, the flow rate of the grinding and polishing liquid that actually contacts the circular casting is increased to improve the heat exchange effect.

Description

Technical Field

[0001] The invention relates to the technical field of casting grinding, in particular to an automatic grinding device for circular castings. Background Art

[0002] The casting grinding device is used to perform surface grinding on castings. During the casting process, castings will produce surface defects such as sand holes, air holes, sand inclusions, etc. These defective surface materials can be removed by grinding, making the casting surface flatter and smoother, thereby improving the quality of the casting. Grinding can also fine-tune the size of the casting so that it can be accurately assembled with other parts.

[0003] The patent document with announcement number CN110227982B discloses a grinding and polishing device for wear-resistant balls. The grinding balls are placed on a placement rack, and polishing liquid is placed in a liquid chamber. The polishing liquid contacts the wear-resistant balls through the through hole, and the grinding disc contacts the wear-resistant balls through a lifting mechanism. When the motor is working, it drives the placement rack to rotate, and the wear-resistant balls are ground and polished by the grinding disc. With a small footprint, the wear-resistant balls can be fully and completely ground and polished. The specific structural setting of the grinding mechanism can make the grinding disc always contact with the wear-resistant balls, and the polishing liquid is supplied during the grinding process, thereby producing a better grinding and polishing effect.

[0004] However, the polishing liquid supply speed in the grinding and polishing device remains fixed. When grinding castings, the surface area of ​​the casting is closely related to the amount of polishing liquid used. A larger surface area means more areas need to be covered and acted upon by the polishing liquid. A fixed polishing liquid supply speed will lead to insufficient polishing liquid supply, resulting in excessive friction on the casting surface and affecting the grinding and polishing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to address the problem in the background technology that insufficient polishing liquid supply affects the polishing efficiency, and to propose an automatic polishing device for circular castings.

[0006] The technical solution of the present invention is: an automatic grinding device for circular castings, comprising an assembly line frame, wherein two symmetrically arranged support plates are fixedly mounted in the middle of the assembly line frame, a motor is fixedly mounted on the side of one of the support plates, and a clamp for clamping the circular casting is fixedly mounted on the output end of the motor, and further comprising:

[0007] A polishing assembly includes a position adjustment member, an extension block, a support plate, a flow chamber, a closed door, and a folding rod. The position adjustment member is arranged in the middle of the assembly line frame. An extension block is arranged in the middle of the position adjustment member. The inner wall of the extension block is provided with a flow chamber. The cross section of the flow chamber adopts an L-shape. The inner wall of the extension block is rotatably connected to the closed door at the corner of the flow chamber. The bottom of the extension block is slidably connected to the support plate. The closed door is located at the end of the support plate. A polishing liquid flows inside the flow chamber. Two support plates are provided, and the two support plates are connected by a folding rod.

[0008] The closed door and the bottom end of the flow cavity form a polishing liquid outlet, which faces the circular casting clamped by the fixture. A polishing tool for polishing the circular casting is provided at the bottom of the position adjustment part.

[0009] Optionally, an integrally formed waterproof membrane is laid on the top surface of the flow cavity and the closed door, and the waterproof membrane fills the joints between the flow cavity, the closed door and the folding rod. An inlet pipe is fixedly installed on the outer wall of the extension block and at the end position of the flow cavity, and a guide rod is fixedly installed on the inner wall of the extension block, and the folding rod slides on the guide rod.

[0010] Optionally, the position adjustment component includes a gantry, a transverse screw, a first slider, a longitudinal screw and a second slider. The gantry adopts an inverted U-shaped structure, and both ends of the gantry are fixedly installed on the top of the assembly line frame. The inner wall of the gantry is rotatably connected to the transverse screw, and the rod body of the transverse screw is slidably connected to the first slider. An extension block is fixedly installed on the bottom of the first slider, and both ends of the longitudinal screw are rotatably connected to the extension block, and the rod body of the longitudinal screw is threadedly connected to the second slider.

[0011] Optionally, the longitudinal screw and the transverse screw are both parallel to the horizontal plane, the longitudinal screw and the transverse screw are perpendicular to each other, the gantry is arranged behind the clamp, and a grinding tool is fixedly installed on the bottom of the second sliding block.

[0012] Optionally, a negative pressure absorption member is provided in the middle of the assembly line frame and below the clamp, and the negative pressure absorption member includes an adjusting screw, an adjusting block, an absorption square tube, a baffle and a push member. Both ends of the adjusting screw are rotatably connected to the assembly line frame, and the adjusting screw is rotatably connected to the transverse screw through a belt. The rod body of the adjusting screw is rotatably connected to the adjusting block, and the side of the adjusting block is slidably connected to the absorption square tube. A negative pressure absorption port is opened in the middle of the absorption square tube, and the negative pressure absorption port of the absorption square tube is slidably connected to a baffle. A push member is provided on the side of the grinding tool, and the end of the baffle is in contact with the push member.

[0013] Optionally, the pushing member includes a pressure block and a docking plate, and two symmetrically arranged docking plates are fixedly installed on the top of the pressure block, and the two docking plates are respectively fixedly installed on the left and right sides of the grinding tool. The outer wall of the absorbing square tube is fixedly installed with nylon elastic cloth, and the nylon elastic cloth adopts a conical funnel-shaped structure. The top of the nylon elastic cloth is fixedly connected to the assembly line frame.

[0014] Optionally, the pressure block is divided into two parts, the upper part of the pressure block adopts a straight plate, and the lower part of the pressure block adopts a wedge structure. The lower part of the pressure block abuts against the absorption square tube, and the upper part of the pressure block is fixedly connected to the baffle.

[0015] Optionally, a slope is provided on one side of the absorption square tube close to the pressure block, the slope of the lower half of the pressure block has the same inclination angle as the slope on the absorption square tube, and the inner wall of the absorption square tube is provided with an avoidance groove that is offset from the negative pressure absorption port, the height of the avoidance groove is lower than the baffle, and a limit rod is slidably connected to the avoidance groove, and both ends of the limit rod are fixedly connected to the assembly line frame.

[0016] Optionally, a recovery component is provided below the absorption square tube, and the recovery component includes a bottom box, a polishing liquid recovery bin, a vibration spring and a screen. Both ends of the bottom box are fixedly connected to the assembly line frame, and a polishing liquid recovery bin is opened on the top of the bottom box. A vibration spring is fixedly installed at the top of the bottom box and at a position offset from the polishing liquid recovery bin. An inclined screen is fixedly installed on the top of the vibration spring, and the bottom of the screen and the end located away from the vibration spring are rotatably connected to the bottom box.

[0017] Optionally, a debris recovery bin is provided on the top of the bottom box and located on the end extension line of the screen, and two symmetrically arranged water retaining bars are fixedly mounted on the top of the screen.

[0018] Compared with the prior art, this application has at least one of the following beneficial technical effects:

[0019] In the present invention, when polishing a circular casting, the larger the diameter of the circular casting, the farther the second slider is from the axis of the circular casting. The folding rod is used to unfold the abutment plate, reduce the discharge outlet of the polishing liquid, and accelerate the flow rate of the polishing liquid. Since the area of ​​the polishing liquid actually in contact with the circular casting is fixed, the flow rate of the polishing liquid that actually contacts the circular casting is increased to improve the heat exchange effect, thereby reducing the temperature of the surface of the circular casting.

[0020] Furthermore, when polishing a circular casting with a large diameter, the docking plate moves so that the pressure block pushes the absorption square tube upward, bringing the absorption square tube close to the circular casting, thereby increasing the absorption effect of debris and at the same time increasing the negative pressure absorption port area of ​​the absorption square tube so that the length of the negative pressure receiving port is adapted to the diameter of the circular casting, further improving the effect of absorbing debris, and at the same time the absorption square tube collects the polishing fluid.

[0021] Furthermore, the vibration generated by the operation of the grinding equipment causes the screen to vibrate, and the vibration spring increases the influence of the vibration on the screen. Under the action of the vibration, metal debris falls along the inclined screen to the debris recovery bin, and the grinding and polishing liquid falls into the polishing liquid recovery bin for recycling and reuse to avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of an embodiment of the present invention is provided;

[0023] Figure 2 A schematic diagram of the structure of a positioning screw according to an embodiment of the present invention is given;

[0024] Figure 3 A schematic cross-sectional view of an extension block structure according to an embodiment of the present invention is provided;

[0025] Figure 4 A schematic cross-sectional view of a gantry structure according to an embodiment of the present invention is provided;

[0026] Figure 5 A schematic structural diagram of a pressure block according to an embodiment of the present invention is provided;

[0027] Figure 6 Bit Figure 5 Schematic diagram of the limit rod structure of part A;

[0028] Figure 7 A schematic structural diagram of a water retaining bar according to an embodiment of the present invention is provided;

[0029] Figure 8 A schematic right side sectional view of a bottom box structure according to an embodiment of the present invention is provided;

[0030] Figure 9 A schematic diagram of the folding rod structure of an embodiment of the present invention is provided;

[0031] Figure numerals: 1. assembly line frame; 2. support plate; 3. motor; 4. clamp; 5. grinding assembly; 51. gantry; 52. horizontal screw; 53. first slider; 54. extension block; 55. longitudinal screw; 56. second slider; 57. abutment plate; 58. flow chamber; 59. inlet pipe; 510. closing door; 511. folding rod; 6. negative pressure absorber; 61. adjusting screw; 62. adjusting block; 63. absorption square tube; 64. baffle; 65. avoidance groove; 66. limiting rod; 67. abutment block; 68. docking plate; 69. nylon stretch cloth; 7. recovery assembly; 71. bottom box; 72. polishing liquid recovery bin; 73. vibration spring; 74. screen; 75. water retaining bar; 76. debris recovery bin; 8. grinding tool. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0034] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] Example 1

[0038] This embodiment provides a circular casting automatic grinding device, such as Figure 1 and Figure 2 As shown, it includes an assembly line frame 1, two symmetrically arranged support plates 2 are fixedly installed in the middle of the assembly line frame 1, a motor 3 is fixedly installed on the side of one of the support plates 2, and a clamp 4 for clamping a circular casting is fixedly installed at the output end of the motor 3. The circular casting is fixed by the clamp 4, and the motor 3 drives the clamp 4 to rotate, thereby rotating the circular casting.

[0039] like Figure 3 As shown, a grinding assembly 5 is provided in the middle of the assembly line frame 1, including a position adjustment part, an extension block 54, a stop plate 57, a flow chamber 58, a closed door 510 and a folding rod 511. The position adjustment part includes a gantry 51, a transverse screw 52, ​​a first slider 53, a longitudinal screw 55 and a second slider 56. The gantry 51 adopts an inverted U-shaped structure. Both ends of the gantry 51 are fixedly mounted on the top of the assembly line frame 1. The inner wall of the gantry 51 is rotatably connected to the transverse screw 52, ​​and the rod body of the transverse screw 52 is slidably connected to the first slider 53. The bottom of the first slider 53 is fixedly mounted with an extension block 54, and both ends of the longitudinal screw 55 are rotatably connected to the extension block 54. The rod body of the longitudinal screw 55 is threadedly connected to the second slider 56, and the bottom of the second slider 56 is fixedly mounted with a grinding tool 8.

[0040] like Figure 3 and Figure 4 As shown, the longitudinal screw 55 and the transverse screw 52 are both parallel to the horizontal plane, and the longitudinal screw 55 and the transverse screw 52 are perpendicular to each other. The gantry 51 is set behind the clamp 4. The position of the first slider 53 is changed by rotating the transverse screw 52, ​​so that the grinding tool 8 is adjusted laterally. The second slider 56 is driven to move by the rotation of the longitudinal screw 55, so that the grinding tool 8 is adjusted longitudinally, so as to adapt to the size of the circular casting, so that the grinding tool 8 can better grind and polish the circular casting.

[0041] A flow cavity 58 is provided on the inner wall of the extension block 54, and an inlet pipe 59 is fixedly installed on the outer wall of the extension block 54 and at the end position of the flow cavity 58. The cross section of the flow cavity 58 is L-shaped, and polishing fluid flows inside the flow cavity 58. The flow cavity 58 guides the polishing fluid to the circular casting, thereby reducing the heat and friction generated during the polishing of the circular casting and improving the polishing efficiency.

[0042] like Figure 9As shown, the inner wall of the extension block 54 is rotatably connected to the closed door 510 at the corner of the flow chamber 58, and the bottom of the extension block 54 is slidably connected to the abutment plate 57. The closed door 510 is located at the end of the abutment plate 57. The closed door 510 and the bottom end of the flow chamber 58 form a polishing liquid outlet, and the polishing liquid outlet faces the circular casting clamped by the fixture 4. Two abutment plates 57 are provided, and the two abutment plates 57 are connected by a folding rod 511. A guide rod is fixedly installed on the inner wall of the extension block 54, and the folding rod 511 slides on the guide rod.

[0043] When the diameter of the circular casting is large, the longitudinal screw 55 rotates to drive the second slider 56 to move a small distance. At this time, the folding rod 511 is expanded to a large extent, so the part of the plate 57 entering the flow chamber 58 is large. At this time, the plate 57 tilts the closing door 510, and the closing door 510 rotates to reduce the discharge outlet of the polishing liquid. At this time, the flow speed of the polishing liquid is fast, thereby accelerating the flow speed of the polishing liquid according to the size of the circular casting. Since the area of ​​the polishing liquid actually in contact with the circular casting is fixed, a large amount of polishing liquid cannot completely contact the circular casting. Therefore, the flow speed of the polishing liquid actually in contact with the circular casting is accelerated by reducing the discharge outlet area, thereby effectively cooling the casting. Moreover, since the distance between the axis of the large-sized circular casting and the polishing tool 8 increases, the polishing liquid is drained through the closing door 510 and directed to a position at the rear of the top of the circular casting, thereby increasing the time the polishing liquid stays on the circular casting and fully utilizing the polishing liquid.

[0044] In this embodiment, the larger the diameter of the circular casting, the farther the second slider 56 is from the axis of the circular casting. The folding rod 511 is used to expand the abutment plate 57, reduce the discharge outlet of the grinding and polishing liquid, and speed up the flow rate of the grinding and polishing liquid. Since the area of ​​the grinding and polishing liquid actually in contact with the circular casting is fixed, the flow rate of the grinding and polishing liquid that actually contacts the circular casting is increased to improve the heat exchange effect, thereby reducing the temperature of the surface of the circular casting.

[0045] Example 2

[0046] Based on Example 1, this embodiment proposes an automatic grinding device for circular castings, such as Figure 5 As shown, a negative pressure absorbing member 6 is provided in the middle of the assembly line frame 1 and below the clamp 4. The negative pressure absorbing member 6 includes an adjusting screw 61, an adjusting block 62, an absorbing square tube 63, a baffle 64 and a pushing member. The pushing member includes a pressing block 67 and a docking plate 68. Two symmetrically arranged docking plates 68 are fixedly installed on the top of the pressing block 67. The two docking plates 68 are respectively fixedly installed on the left and right sides of the grinding tool 8. A nylon elastic cloth 69 is fixedly installed on the outer wall of the absorbing square tube 63. The nylon elastic cloth 69 adopts a conical funnel-shaped structure. The top of the nylon elastic cloth 69 is fixedly connected to the assembly line frame 1.

[0047] like Figure 2 As shown, both ends of the adjusting screw 61 are rotatably connected to the assembly line frame 1, the adjusting screw 61 is rotatably connected to the transverse screw 52 through a belt, the rod body of the adjusting screw 61 is rotatably connected to the adjusting block 62, the side of the adjusting block 62 is slidably connected to the absorption square tube 63, the middle of the absorption square tube 63 is provided with a negative pressure absorption port, and the negative pressure absorption port of the absorption square tube 63 is slidably connected to a baffle 64.

[0048] The nylon stretch cloth 69 is used to collect the debris generated by grinding, and the grinding tool 8 moves to change the position of the docking plate 68, so that the docking plate 68 is always located below the grinding tool 8, thereby improving the effect of the square tube 63 in absorbing the debris.

[0049] The pressure block 67 is divided into two parts, the upper part of the pressure block 67 adopts a straight plate, and the lower part of the pressure block 67 adopts a wedge-shaped structure. The lower part of the pressure block 67 abuts against the absorption square tube 63, and the upper part of the pressure block 67 is fixedly connected to the baffle 64.

[0050] When grinding a circular casting with a small diameter, the docking plate 68 moves so that the pressure block 67 drives the baffle 64 to move to reduce the negative pressure absorption port of the absorption square tube 63, thereby increasing the suction force; and when grinding a circular casting with a large diameter, the docking plate 68 moves so that the pressure block 67 pushes the absorption square tube 63 upward, so that the absorption square tube 63 is close to the circular casting, thereby increasing the absorption effect of debris and increasing the negative pressure absorption port area of ​​the absorption square tube 63, so that the length of the negative pressure receiving port is adapted to the diameter of the circular casting.

[0051] like Figure 6 As shown, a slope is provided on one side of the absorption square tube 63 near the pressure block 67. The slope of the lower half of the pressure block 67 has the same inclination angle as the slope of the absorption square tube 63, so that the pressure block 67 can squeeze the absorption square tube 63. The inner wall of the absorption square tube 63 is provided with an avoidance groove 65 that is offset from the negative pressure absorption port. The height of the avoidance groove 65 is lower than that of the baffle 64. A limit rod 66 is slidably connected to the avoidance groove 65. Both ends of the limit rod 66 are fixedly connected to the assembly line frame 1. When the first slide 53 moves upward, the first slide 53 is prevented from tilting.

[0052] In this embodiment, when polishing a circular casting with a large diameter, the docking plate 68 moves so that the pressure block 67 pushes the absorption square tube 63 upward, so that the absorption square tube 63 is close to the circular casting, thereby increasing the absorption effect of debris. At the same time, the negative pressure absorption port area of ​​the absorption square tube 63 is increased, so that the length of the negative pressure receiving port is adapted to the diameter of the circular casting, further improving the effect of absorbing debris, and at the same time, the absorption square tube 63 collects the polishing liquid.

[0053] Example 3

[0054] Based on the above embodiment 1 or 2, this embodiment proposes an automatic grinding device for circular castings, such as Figure 7 and Figure 8 As shown, a recovery component 7 is provided below the absorption square tube 63, and the recovery component 7 includes a bottom box 71, a polishing liquid recovery bin 72, a vibration spring 73 and a screen 74. Both ends of the bottom box 71 are fixedly connected to the assembly line frame 1, and a polishing liquid recovery bin 72 is opened on the top of the bottom box 71. A vibration spring 73 is fixedly installed on the top of the bottom box 71 and at a position offset from the polishing liquid recovery bin 72. An inclined screen 74 is fixedly installed on the top of the vibration spring 73. The bottom of the screen 74 and the end located away from the vibration spring 73 are rotatably connected to the bottom box 71. Two symmetrically arranged water retaining bars 75 are fixedly installed on the top of the screen 74.

[0055] Metal debris and grinding and polishing liquid fall from the absorption square tube 63 onto the screen 74, wherein the grinding and polishing liquid falls from the screen 74 into the polishing liquid recovery bin 72, while the metal debris remains above the screen 74. Since the grinding device generates vibration when it is running, the screen 74 vibrates up and down through the vibration and the vibration spring 73, and the metal debris moves along the inclined screen 74 under the action of the vibration.

[0056] A debris recovery bin 76 is provided at the top of the bottom box 71 and on the extension line of the end of the screen 74 . As the screen 74 vibrates, the metal debris moves and eventually enters the debris recovery bin 76 .

[0057] In this embodiment, the screen 74 is vibrated by the vibration generated by the operation of the grinding equipment, and the vibration spring 73 increases the influence of the vibration on the screen 74. Under the action of the vibration, metal debris falls along the inclined screen 74 to the debris recovery bin 76, and the grinding and polishing liquid falls into the polishing liquid recovery bin 72 for recycling and reuse to avoid waste.

[0058] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An automatic grinding device for circular castings, comprising an assembly line frame (1), wherein two symmetrically arranged support plates (2) are fixedly mounted in the middle of the assembly line frame (1), a motor (3) is fixedly mounted on the side of one of the support plates (2), and a clamp (4) for clamping the circular casting is fixedly mounted on the output end of the motor (3), characterized in that: Also includes: A grinding assembly (5) comprises a position adjustment member, an extension block (54), a stop plate (57), a flow chamber (58), a closed door (510) and a folding rod (511), wherein the position adjustment member is arranged in the middle of the assembly line frame (1), an extension block (54) is arranged in the middle of the position adjustment member, a flow chamber (58) is provided on the inner wall of the extension block (54), a cross section of the flow chamber (58) is L-shaped, the inner wall of the extension block (54) is rotatably connected to the closed door (510) at the corner of the flow chamber (58), the bottom of the extension block (54) is slidably connected to the stop plate (57), the closed door (510) is located at the end of the stop plate (57), a grinding and polishing liquid flows inside the flow chamber (58), two stop plates (57) are arranged, and the two stop plates (57) are connected by a folding rod (511); The closed door (510) and the bottom end of the flow chamber (58) form a polishing liquid discharge outlet, the polishing liquid discharge outlet faces the circular casting clamped by the fixture (4), and a polishing tool (8) for polishing the circular casting is arranged at the bottom of the position adjustment member; A negative pressure absorbing member (6) is arranged in the middle of the assembly line frame (1) and below the clamp (4). The negative pressure absorbing member (6) comprises a positioning screw (61), a positioning block (62), an absorbing square tube (63), a baffle (64) and a push member. Both ends of the positioning screw (61) are rotatably connected to the assembly line frame (1). The rod body of the positioning screw (61) is rotatably connected to the positioning block (62). The side of the positioning block (62) is slidably connected to the absorbing square tube (63). A negative pressure absorbing port is provided in the middle of the absorbing square tube (63). The negative pressure absorbing port of the absorbing square tube (63) is slidably connected to the baffle (64). A push member is arranged on the side of the grinding tool (8), and the end of the baffle (64) is in contact with the push member. The pusher comprises a pressing block (67) and a docking plate (68), the top of the pressing block (67) is fixedly mounted with two symmetrically arranged docking plates (68), the two docking plates (68) are respectively fixedly mounted on the left and right sides of the grinding tool (8), the outer wall of the absorbing square tube (63) is fixedly mounted with a nylon elastic cloth (69), the nylon elastic cloth (69) adopts a conical funnel-shaped structure, and the top of the nylon elastic cloth (69) is fixedly connected to the assembly line frame (1); The pressing block (67) is divided into two parts, the upper part of the pressing block (67) is a straight plate, and the lower part of the pressing block (67) is a wedge-shaped structure. The lower part of the pressing block (67) is in contact with the absorption square tube (63), and the upper part of the pressing block (67) is fixedly connected to the baffle (64). A slope is provided on one side of the absorption square tube (63) close to the pressure block (67); the slope of the lower half of the pressure block (67) has the same inclination angle as the slope on the absorption square tube (63); an avoidance groove (65) offset from the negative pressure absorption port is provided on the inner wall of the absorption square tube (63); the height of the avoidance groove (65) is lower than the baffle (64); a limit rod (66) is slidably connected to the avoidance groove (65); both ends of the limit rod (66) are fixedly connected to the assembly line frame (1).

2. The automatic grinding device for circular castings according to claim 1, characterized in that: An integrally formed waterproof membrane is laid on the top surface of the flow cavity (58) and the closed door (510), and the waterproof membrane fills the joints between the flow cavity (58), the closed door (510) and the folding rod (511). An introduction pipe (59) is fixedly installed on the outer wall of the extension block (54) and at the end position of the flow cavity (58), and a guide rod is fixedly installed on the inner wall of the extension block (54), and the folding rod (511) slides on the guide rod.

3. The automatic grinding device for circular castings according to claim 1, characterized in that: The position adjustment member comprises a gantry (51), a transverse screw rod (52), a first slider (53), a longitudinal screw rod (55) and a second slider (56); the gantry (51) adopts an inverted U-shaped structure; both ends of the gantry (51) are fixedly mounted on the top of the assembly line frame (1); the inner wall of the gantry (51) is rotatably connected to the transverse screw rod (52); the positioning screw rod (61) is rotatably connected to the transverse screw rod (52) via a belt; the shaft of the transverse screw rod (52) is slidably connected to the first slider (53); an extension block (54) is fixedly mounted on the bottom of the first slider (53); both ends of the longitudinal screw rod (55) are rotatably connected to the extension block (54); the shaft of the longitudinal screw rod (55) is threadedly connected to the second slider (56).

4. The automatic grinding device for circular castings according to claim 3, characterized in that: The longitudinal screw rod (55) and the transverse screw rod (52) are both parallel to the horizontal plane, and the longitudinal screw rod (55) and the transverse screw rod (52) are perpendicular to each other. The gantry (51) is arranged behind the clamp (4), and the grinding tool (8) is fixedly installed at the bottom of the second sliding block (56).

5. The automatic grinding device for circular castings according to claim 4, characterized in that: A recovery component (7) is arranged below the absorption square tube (63), and the recovery component (7) comprises a bottom box (71), a polishing liquid recovery bin (72), a vibration spring (73) and a screen (74). Both ends of the bottom box (71) are fixedly connected to the assembly line frame (1). The top of the bottom box (71) is provided with a polishing liquid recovery bin (72). The vibration spring (73) is fixedly installed at the top of the bottom box (71) and at a position offset from the polishing liquid recovery bin (72). An inclined screen (74) is fixedly installed at the top of the vibration spring (73). The bottom of the screen (74) and the end located away from the vibration spring (73) are rotatably connected to the bottom box (71).

6. The automatic grinding device for circular castings according to claim 5, characterized in that: A debris recovery bin (76) is provided at the top of the bottom box (71) and on the extension line of the end of the screen (74), and two symmetrically arranged water retaining bars (75) are fixedly mounted on the top of the screen (74).

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