Structure and method for preventing sand box from colliding

Abstract

The invention discloses a structure and a method for preventing sand boxes from colliding. The structure comprises a base, a lower sand box, an upper sand box, a first frame, a buffer seat, a buffer spring, a contact plate, a hanging column, a first positioning plate, a second positioning plate, a nut, sawteeth, a guide rail, a hydraulic pushing cylinder, a pushing column, a pushing plate, a hydraulic buffer cylinder, a buffer column, a buffer plate, a photoelectric emitter and a photoelectric sensor. The method comprises the following steps: 1, core making and mold assembling; step 2, low-speed pushing; step 3, clearance elimination of the sand box; fourthly, the buffering cylinder is shrunk; step 5, sensing position change; step 6, pushing mode switching; a sand box collision prevention structure is designed, displacement changes of the output end of the hydraulic buffer cylinder are monitored in real time through the position sensor, elimination of gaps between sand boxes is determined at the first time, the system immediately controls the hydraulic push cylinder to be switched from a low speed to a high speed, and the problem that gaps exist between the sand boxes during high-speed pushing, and sand box collision occurs is solved.

Description

Technical Field

[0001] The invention relates to the technical field of casting sand boxes, and in particular to a structure and method for preventing a sand box from colliding with another sand box. Background Art

[0002] The casting sand box is a key component in the casting process. It is mainly used to support and contain the molding sand (molding material) so as to form the desired casting shape during the casting process. The molding sand in the sand box is compacted and fixed into a specific shape, which is opposite to the appearance of the desired casting, forming a cavity (i.e., sand mold). When the molten metal is poured into this cavity, it will cool and solidify and fill the entire cavity, eventually forming the desired casting. After the sand box molding is completed and the mold is locked, the sand box needs to be pushed to the casting position by a hydraulic push cylinder for subsequent casting processes.

[0003] The existing sand box pushing process has the following defects: First, when the hydraulic pushing cylinder pushes the sand box, there is a gap between the sand boxes. When the hydraulic pushing cylinder switches from low speed to high speed, due to the gap between the sand boxes, the sand box collision problem occurs. The sand mold of the sand box after the collision is easy to scatter, and a defective product is cast; second, if the time set by the hydraulic pushing cylinder in the low-speed pushing stage is too short and the pushing distance is limited, it is difficult to effectively eliminate the gap between the sand boxes; when the pushing speed is increased to high speed, the hydraulic cylinder may be damaged by directly hitting the sand box that is not tightly fitted, further affecting the stability and safety of the operation; third, on the contrary, if the hydraulic pushing cylinder maintains a long time in the low-speed stage and pushes a long distance to try to completely eliminate the gap between the sand boxes, although the collision problem can be solved, it will undoubtedly greatly extend the production cycle, reduce the overall production efficiency, and increase unnecessary cost expenditures; fourth, the sand box design lacks the necessary buffer structure, which makes it impossible for the sand boxes to effectively absorb or disperse the impact force when they contact each other, which not only increases the risk of loose sand molds, but also may pose a threat to the stable operation of the entire production line. Summary of the invention

[0004] The object of the present invention is to provide a structure and method for preventing a sand box from colliding with another sand box, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure for preventing a sand box from colliding with another sand box, comprising a lower sand box, the upper surface of the lower sand box is fixedly connected to an upper sand box, buffer seats are arranged on the outer walls on both sides of the lower sand box and the upper sand box, a buffer spring is arranged in the buffer seat, the other end of the buffer spring is fixedly connected to a contact plate, a hydraulic pushing cylinder is arranged on one side of the lower sand box, a hydraulic buffer cylinder is arranged on the other side of the lower sand box, a buffer column is fixedly connected to the output end of the hydraulic buffer cylinder, a photoelectric transmitter is fixedly connected to the buffer column, guide rails are arranged on both sides of the lower sand box, a photoelectric sensor is arranged on one side of the photoelectric transmitter, and the photoelectric sensor is fixedly connected to an outer wall on one side of the guide rail.

[0006] As a further technical solution of the present invention, the output end of the hydraulic pushing cylinder is fixedly connected to a pushing column, the other end of the pushing column is fixedly connected to a pushing plate, and the pushing plate is arranged on an outer wall of one side of the contact plate, and a third fixing bolt is sleeved on the outer wall of the hydraulic pushing cylinder.

[0007] As a further technical solution of the present invention, a buffer plate is fixedly connected to one end of the buffer column, and the buffer plate is arranged on an outer wall of one side of the contact plate, and a fourth fixing bolt is sleeved on the outer wall of the hydraulic buffer cylinder.

[0008] As a further technical solution of the present invention, a first frame is provided on the outer wall of the lower sand box, a first fixing bolt is sleeved on the first frame, a base is provided at the bottom end of the lower sand box, and the first fixing bolt is threadedly connected to the base, and a second frame is provided on the outer wall of the upper sand box.

[0009] As a further technical solution of the present invention, a first reinforcing rib is arranged on the outer wall of the lower sand box, and a second reinforcing rib is arranged on the outer wall of the upper sand box.

[0010] As a further technical solution of the present invention, a first positioning plate is provided on the outer walls on both sides of the lower sand box, and a second positioning plate is provided on the outer walls on both sides of the upper sand box. A second fixing bolt is sleeved on the first positioning plate, and the other end of the second fixing bolt is sleeved on the second positioning plate. A nut is provided on the outer wall on one side of the second positioning plate, and the nut is threadedly connected to the second fixing bolt.

[0011] As a further technical solution of the present invention, hanging columns are arranged on the outer walls of both sides of the lower sand box and the upper sand box, and saw teeth are arranged on the inner walls of the lower sand box and the upper sand box.

[0012] A method for preventing a sand box from colliding with another sand box, comprising the steps of: first, core making and closing the mold; second, low-speed pushing; third, eliminating the gap between the sand boxes; fourth, contracting the buffer cylinder; fifth, sensing position changes; and sixth, switching the pushing mode.

[0013] In the above step 1, the prepared molding sand is filled into the sand box, compacted and leveled, the core is installed according to the internal structure requirements of the casting, and the fixed base, the lower sand box and the upper sand box are connected to close the mold;

[0014] In the above step 2, the mold box is pushed at a low speed by a hydraulic push cylinder;

[0015] In the above step 3, the mold flask is pushed at a low speed to eliminate the gap between the flasks and the buffer structure is used for buffering;

[0016] In the above step 4, after the gap between the boxes is eliminated, the sand box squeezes the hydraulic buffer cylinder to shrink it;

[0017] In the above step 5, the position change of the buffer column is sensed by a position sensor;

[0018] In the above step six, the hydraulic pushing cylinder is controlled to switch from the low-speed pushing mode to the high-speed pushing mode.

[0019] As a further technical solution of the present invention, in the step three, the hydraulic pushing cylinder contacts the contact plate on the lower sand box through the pushing plate on the pushing column and pushes the lower sand box to move along the guide rail. When the sand boxes are in contact, the contact plate pushes the buffer spring to compress to achieve a buffering effect. The elastic force of the buffer spring is less than the friction force of the sliding base. When the adjacent sand boxes are tightly fitted together, the rear sand box moves with the front sand box, thereby achieving the purpose of smoothly eliminating the gap between the boxes.

[0020] As a further technical solution of the present invention, in step five, after the gap between the boxes is eliminated, the sand box on the outermost side squeezes the buffer plate through the outer contact plate, causing the buffer column to shrink. During the process, the photoelectric emitter moves along with it, and receives the position signal through the photoelectric sensor to detect the position change.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is designed with a sand box collision prevention structure, and the displacement change of the output end of the hydraulic buffer cylinder is monitored in real time by a position sensor, and the elimination of the gap between the sand boxes is determined at the first time. The system immediately controls the hydraulic pushing cylinder to switch from low speed to high speed to prevent the existence of gaps between the sand boxes during high-speed pushing, which may cause the problem of sand box collision. The time of the low-speed pushing stage can be accurately controlled, which can not only fully eliminate the gaps between the boxes and avoid potential problems caused by residual gaps, but also effectively shorten the production cycle and avoid the decrease in production efficiency caused by excessive pushing time. While ensuring production quality, it also significantly improves production efficiency. At the same time, the sand box contact buffer structure can further reduce the impact force generated when the sand boxes are in contact and fitting, thereby ensuring the stability of the sand core during the pushing process, providing a strong guarantee for the high-quality production of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall top view structure of the present invention;

[0024] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the A area in the middle;

[0025] Figure 4 It is a schematic diagram of the overall side view structure of the present invention;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the mold sand box of the present invention;

[0027] Figure 6 The present invention is a flow chart of the method.

[0028] In the figure: 1. base; 2. lower sand box; 3. upper sand box; 4. first frame; 5. first fixing bolt; 6. second frame; 7. first reinforcing rib; 8. second reinforcing rib; 9. buffer seat; 10. buffer spring; 11. contact plate; 12. hanging column; 13. first positioning plate; 14. second positioning plate; 15. second fixing bolt; 16. nut; 17. sawtooth; 18. guide rail; 19. hydraulic push cylinder; 20. third fixing bolt; 21. push column; 22. push plate; 23. hydraulic buffer cylinder; 24. fourth fixing bolt; 25. buffer column; 26. buffer plate; 27. photoelectric transmitter; 28. photoelectric sensor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Please refer to the attached Figure 1 -Attached Figure 5An embodiment of the present invention provides a structure for preventing a sand box from colliding with another sand box, comprising a lower sand box 2, an upper sand box 3 is fixedly connected to the upper surface of the lower sand box 2, buffer seats 9 are arranged on the outer walls of both sides of the lower sand box 2 and the upper sand box 3, a buffer spring 10 is arranged in the buffer seat 9, a contact plate 11 is fixedly connected to the other end of the buffer spring 10, a hydraulic push cylinder 19 is arranged on one side of the lower sand box 2, a hydraulic buffer cylinder 23 is arranged on the other side of the lower sand box 2, a buffer column 25 is fixedly connected to the output end of the hydraulic buffer cylinder 23, a photoelectric transmitter 27 is fixedly connected to the buffer column 25, guide rails 18 are arranged on both sides of the lower sand box 2, and a photoelectric sensor 2 is arranged on one side of the photoelectric transmitter 27. 8, and the photoelectric sensor 28 is fixedly connected to the outer wall of one side of the guide rail 18; the output end of the hydraulic push cylinder 19 is fixedly connected to the push column 21, and the other end of the push column 21 is fixedly connected to the push plate 22, and the push plate 22 is arranged on the outer wall of one side of the contact plate 11, and the outer wall of the hydraulic push cylinder 19 is sleeved with a third fixing bolt 20, and the third fixing bolt 20 is used to fix the hydraulic push cylinder 19; one end of the buffer column 25 is fixedly connected to the buffer plate 26, and the buffer plate 26 is arranged on the outer wall of one side of the contact plate 11, and the outer wall of the hydraulic buffer cylinder 23 is sleeved with a fourth fixing bolt 24, and the fourth fixing bolt 24 is used to fix the hydraulic buffer cylinder 23; the outer wall of the lower sand box 2 A first frame 4 is provided on the upper part, and a first fixing bolt 5 is sleeved on the first frame 4. A base 1 is provided at the bottom end of the lower sand box 2, and the first fixing bolt 5 is threadedly connected to the base 1. A second frame 6 is provided on the outer wall of the upper sand box 3, and the first fixing bolt 5 is used to connect and fix the lower sand box 2 and the base 1; a first reinforcing rib 7 is provided on the outer wall of the lower sand box 2, and a second reinforcing rib 8 is provided on the outer wall of the upper sand box 3. The first reinforcing rib 7 and the second reinforcing rib 8 are respectively used to improve the structural strength of the lower sand box 2 and the upper sand box 3; a first positioning plate 13 is provided on the outer walls of both sides of the lower sand box 2, and a second positioning plate 14 is provided on the outer walls of both sides of the upper sand box 3, and the first positioning plate 13 is sleeved with a second A fixing bolt 15, and the other end of the second fixing bolt 15 is sleeved on the second positioning plate 14, a nut 16 is provided on the outer wall of one side of the second positioning plate 14, and the nut 16 is threadedly connected to the second fixing bolt 15, the first positioning plate 13, the second positioning plate 14, the second fixing bolt 15 and the nut 16 are used to connect and fasten the lower sand box 2 and the upper sand box 3; hanging columns 12 are provided on the outer walls of both sides of the lower sand box 2 and the upper sand box 3, and serrations 17 are provided on the inner walls of the lower sand box 2 and the upper sand box 3. The hanging columns 12 are used to provide a lifting position for easy transportation and positioning, and the serrations 17 are used to increase the contact area between the inner wall of the sand box and the sand mold, thereby improving the stability and fixation of the sand mold.

[0031] Please refer to the attached Figure 6, an embodiment of the present invention provides: a method for preventing a sand box from colliding with a sand box, comprising step one, core making and closing; step two, low-speed pushing; step three, eliminating the gap between the sand boxes; step four, contracting the buffer cylinder; step five, sensing position changes; step six, switching the pushing mode;

[0032] In the above step 1, the prepared molding sand is filled into the sand box, compacted and leveled, the core is installed according to the internal structure requirements of the casting, and the fixed base 1, the lower sand box 2 and the upper sand box 3 are connected to close the mold;

[0033] In the above step 2, the mold box is pushed at a low speed by the hydraulic push cylinder 19;

[0034] In the above step three, the mold sand box is pushed at a low speed to eliminate the gap between the boxes and buffered by the buffer structure. The hydraulic push cylinder 19 contacts the contact plate 11 on the lower sand box 2 through the push plate 22 on the push column 21 and pushes the lower sand box 2 to move along the guide rail 18. When the sand boxes are in contact, the contact plate 11 pushes the buffer spring 10 to compress to achieve a buffering effect. The elastic force of the buffer spring 10 is less than the friction force of the sliding of the base 1. When the adjacent sand boxes are tightly fitted together, the rear sand box moves with the front sand box, which achieves the purpose of smoothly eliminating the gap between the boxes.

[0035] In the above step 4, after the gap between the boxes is eliminated, the sand box squeezes the hydraulic buffer cylinder 23 to shrink it;

[0036] In the above step 5, after the gap between the boxes is eliminated, the outermost sand box squeezes the buffer plate 26 through the outer contact plate 11, so that the buffer column 25 shrinks. During this process, the photoelectric transmitter 27 moves along with it, and receives the position signal through the photoelectric sensor 28 to detect the position change;

[0037] In the above step six, the hydraulic pushing cylinder 19 is controlled to switch from the low-speed pushing mode to the high-speed pushing mode.

[0038] Based on the above, the advantage of the present invention is that when the sand box is pushed by the present invention, the sand core preparation work is first carried out, the configured molding sand is filled into the lower sand box 2 and the upper sand box 3, tamped and leveled, the core making is installed according to the internal structure requirements of the casting, and the fixed base 1, the lower sand box 2 and the upper sand box 3 are connected to close the mold, the lower sand box 2 and the base 1 are connected by the first fixing bolt 5 on the first frame 4, the upper sand box 3 is placed on the lower sand box 2 by aligning the first frame 4 and the second frame 6, the lower sand box 2 and the upper sand box 3 are connected and fastened by the first positioning plate 13, the second positioning plate 14, the second fixing bolt 15 and the nut 16, after the core making and closing are completed, the closing sand box is pushed at a low speed by the hydraulic pushing cylinder 19, the hydraulic pushing cylinder 19 contacts the contact plate 11 on the lower sand box 2 through the pushing plate 22 on the pushing column 21 and pushes the lower sand box 2 to move along the guide rail 18, when the sand boxes are in contact, the contact plate 11 pushes the buffer spring 10 in the buffer seat 9 to compress to achieve a buffering effect, and the elasticity of the buffer spring 10 The force is smaller than the friction force of the sliding of the base 1. When the adjacent sand boxes are tightly fitted together, the rear sand box moves with the front sand box to smoothly eliminate the gap between the boxes. After the gap between the boxes is eliminated, the outermost sand box squeezes the buffer plate 26 through the outer contact plate 11, so that the buffer column 25 on the hydraulic buffer cylinder 23 shrinks. During the process, the photoelectric transmitter 27 moves along with it, and receives the position signal through the photoelectric sensor 28 to detect the position change, indicating that the gap between the sand boxes has been eliminated. Then the hydraulic push cylinder 19 is controlled to switch from the low-speed push mode to the high-speed push mode to complete the subsequent push; wherein the first reinforcing rib 7 and the second reinforcing rib 8 are respectively used to improve the structural strength of the lower sand box 2 and the upper sand box 3, the hanging column 12 is used to provide a lifting position for easy handling and positioning, the serrations 17 are used to increase the contact area between the inner wall of the sand box and the sand mold, thereby improving the stability and fixity of the sand mold, and the third fixing bolt 20 and the fourth fixing bolt 24 are respectively used to fix the hydraulic push cylinder 19 and the hydraulic buffer cylinder 23.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A structure for preventing a flask from colliding with another flask, comprising a lower flask (2), characterized in that: The upper surface of the lower sand box (2) is fixedly connected to the upper sand box (3), and buffer seats (9) are arranged on the outer walls of both sides of the lower sand box (2) and the upper sand box (3), and a buffer spring (10) is arranged in the buffer seat (9), and the other end of the buffer spring (10) is fixedly connected to the contact plate (11), a hydraulic push cylinder (19) is arranged on one side of the lower sand box (2), and a hydraulic buffer cylinder (23) is arranged on the other side of the lower sand box (2), and a buffer column (25) is fixedly connected to the output end of the hydraulic buffer cylinder (23), and a photoelectric transmitter (27) is fixedly connected to the buffer column (25), and guide rails (18) are arranged on both sides of the lower sand box (2), and a photoelectric sensor (28) is arranged on one side of the photoelectric transmitter (27), and the photoelectric sensor (28) is fixedly connected to the outer wall of one side of the guide rail (18).

2. The structure for preventing a sand box from colliding with another sand box according to claim 1, characterized in that: The output end of the hydraulic push cylinder (19) is fixedly connected to a push column (21), the other end of the push column (21) is fixedly connected to a push plate (22), and the push plate (22) is arranged on an outer wall of one side of the contact plate (11), and a third fixing bolt (20) is sleeved on the outer wall of the hydraulic push cylinder (19).

3. The structure for preventing a sand box from colliding with another sand box according to claim 1, characterized in that: One end of the buffer column (25) is fixedly connected to a buffer plate (26), and the buffer plate (26) is arranged on an outer wall of one side of the contact plate (11). A fourth fixing bolt (24) is sleeved on the outer wall of the hydraulic buffer cylinder (23).

4. The structure for preventing a sand box from colliding with another sand box according to claim 1, characterized in that: The outer wall of the lower sand box (2) is provided with a first frame (4), and a first fixing bolt (5) is sleeved on the first frame (4); a base (1) is provided at the bottom end of the lower sand box (2), and the first fixing bolt (5) is threadedly connected to the base (1); and a second frame (6) is provided on the outer wall of the upper sand box (3).

5. The structure for preventing a sand box from colliding with another sand box according to claim 4, characterized in that: The outer wall of the lower flask (2) is provided with a first reinforcing rib (7), and the outer wall of the upper flask (3) is provided with a second reinforcing rib (8).

6. The structure for preventing a sand box from colliding with another sand box according to claim 4, characterized in that: A first positioning plate (13) is arranged on the outer walls of both sides of the lower sand box (2), and a second positioning plate (14) is arranged on the outer walls of both sides of the upper sand box (3). A second fixing bolt (15) is sleeved on the first positioning plate (13), and the other end of the second fixing bolt (15) is sleeved on the second positioning plate (14). A nut (16) is arranged on the outer wall of one side of the second positioning plate (14), and the nut (16) is threadedly connected to the second fixing bolt (15).

7. The structure for preventing a sand box from colliding with another sand box according to claim 4, characterized in that: Hanging columns (12) are arranged on the outer walls of both sides of the lower sand box (2) and the upper sand box (3), and saw teeth (17) are arranged on the inner walls of the lower sand box (2) and the upper sand box (3).

8. A method for preventing sand boxes from colliding, comprising step 1, core making and closing; step 2, low speed pushing; step 3, eliminating the gap between sand boxes; step 4, shrinking the buffer cylinder; step 5, sensing position change; step 6, switching the pushing mode; characterized in that: In the above step 1, the prepared molding sand is filled into the sand box, compacted and leveled, the core is installed according to the internal structure requirements of the casting, and the fixed base (1), the lower sand box (2) and the upper sand box (3) are connected to close the mold; In the above step 2, the mold box is pushed at a low speed by a hydraulic pushing cylinder (19); In the above step 3, the mold flask is pushed at a low speed to eliminate the gap between the flasks and the buffer structure is used for buffering; In the above step 4, after the gap between the boxes is eliminated, the sand box squeezes the hydraulic buffer cylinder (23) to shrink it; In the above step 5, the position change of the buffer column (25) is sensed by a position sensor; In the above step six, the hydraulic pushing cylinder (19) is controlled to switch from the low-speed pushing mode to the high-speed pushing mode.

9. A method for preventing a sand box from colliding with another sand box according to claim 8, characterized in that: In the step three, the hydraulic push cylinder (19) contacts the contact plate (11) on the lower sand box (2) through the push plate (22) on the push column (21) and pushes the lower sand box (2) to move along the guide rail (18). When the sand boxes are in contact, the contact plate (11) pushes the buffer spring (10) to compress and achieve a buffering effect. The elastic force of the buffer spring (10) is less than the friction force of the sliding of the base (1). When the adjacent sand boxes are tightly fitted together, the rear sand box moves together with the front sand box, thereby achieving the purpose of smoothly eliminating the gap between the boxes.

10. A method for preventing a sand box from colliding with another sand box according to claim 8, characterized in that: In step 5, after the gap between the boxes is eliminated, the outermost sand box squeezes the buffer plate (26) through the outer contact plate (11), causing the buffer column (25) to shrink. During this process, the photoelectric transmitter (27) moves along with it, and receives the position signal through the photoelectric sensor (28) to detect the position change.

Images