Large-scale jolt ramming table for lost foam casting

Abstract

The utility model relates to the technical field of jolt ramming tables, in particular to a large jolt ramming table for lost foam casting, which comprises a jolt ramming table body for vibrating a sand box, a fixed support pillar is arranged on the top surface of the jolt ramming table body, and a plurality of support legs are arranged on the bottom surface of the sand box. The sand box abuts against the top face of the fixed jacking column through a part of the supporting legs, a movable jacking column is further arranged on the top face of the jolt ramming table body and corresponds to the other part of the supporting legs, and the jolt ramming table body is provided with an adjusting assembly used for driving the movable jacking column to ascend and descend. The compaction table body is further provided with a clamping assembly used for fixing the sand box. The large sand box leveling device has the effects of leveling a large sand box and improving the vibration transmissibility.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a vibrating table, in particular to a large vibrating table for lost foam casting. BACKGROUND

[0002] The lost foam casting technology (EPC method) is a casting method in which a foam plastic is used to make a real mold shape completely consistent with the shape of a part, the size of which only differs from the metal shrinkage, the real mold shape is coated with a refractory binder after being dried and then is placed in a "special sand box" for sand molding, is vibrated and compacted, and then is poured with metal liquid under vacuum negative pressure or atmospheric pressure so that the mold shape is heated and gasified to disappear, the metal liquid replaces the position of the foam plastic mold shape and then is cooled and solidified to obtain a metal part consistent with the shape of the mold shape. The lost foam casting is considered as the most possible green casting process technology in the 21st century due to the energy saving, emission reduction and environmental protection features, and the vibration filling and compacting in the dry sand molding process are one of the most important links of the lost foam casting.

[0003] At present, for the dry sand molding, vibration filling and compacting of a large lost foam casting sand box, a large sand box is generally directly placed on a large vibrating table, a certain mechanical limiting is added around, the sand box is floated on the vibrating table surface, a plurality of vibration motors are fixed under the vibrating table surface frame, and a large exciting force can be provided for the sand box.

[0004] However, the large vibrating table mode has the following problems: (1) due to the manufacturing precision and deformation after use and other factors, the large vibrating table surface and the bottom of the sand box cannot be closely matched, which directly affects the exciting transmission efficiency; (2) the sand box and the vibrating table surface are not clamped and are in a floating state, the exciting force is mainly in the vertical direction, the molding sand filling direction cannot be controlled, and the consistency of the molding sand accumulation density in the sand box is poor. CONTENT OF THE INVENTION

[0005] In order to level the sand box, improve the vibration transmission efficiency and improve the molding sand accumulation density in the sand box, the application provides a large vibrating table for lost foam casting.

[0006] The application provides a large vibrating table for lost foam casting, which adopts the following technical scheme:

[0007] A large vibrating table for lost foam casting, comprising a vibrating table body for vibrating a sand box, a fixed top column is arranged on the top surface of the vibrating table body, a plurality of supporting legs are arranged on the bottom surface of the sand box, the sand box is abutted to the top surface of the fixed top column through a part of the supporting legs, a movable top column is further arranged on the top surface of the vibrating table body, the movable top column corresponds to another part of the supporting legs, the vibrating table body is provided with an adjusting assembly for driving the movable top column to ascend and descend, and the vibrating table body is further provided with a clamping assembly for fixing the sand box.

[0008] By adopting the technical scheme, when it is needed to vibrate the sand box, the sand box is first placed on the vibrating table body, and the fixed top column is aligned with one part of the supporting legs, and the movable top column is aligned with another part of the supporting legs; when it is needed to adjust the levelness of the sand box, the movable top column is driven to ascend by the adjusting assembly, at this time, the movable top column abuts against the other part of the supporting legs, and the sand box is leveled by the supporting legs, and finally the sand box is fixed by the clamping assembly, thereby facilitating the leveling of the sand box, avoiding the inclination and shaking of the sand box during vibration, ensuring that the sand box is completely abutted against the top surface of the vibrating table body, improving the vibration transmission efficiency, and improving the internal molding sand accumulation density of the sand box.

[0009] Optionally, the adjusting assembly comprises a wedge-shaped block, the top surface of the vibrating table body is provided with an adjusting seat, the movable top column is arranged in the adjusting seat in a lifting manner, the bottom end of the movable top column is provided with a wedge-shaped surface, the wedge-shaped block is arranged in the adjusting seat in a sliding manner, the wedge-shaped surface of the movable top column is matched with the wedge-shaped block, and the vibrating table body is provided with a driving member for driving the wedge-shaped block to move.

[0010] By adopting the technical scheme, when the driving member is started, the driving member drives the wedge-shaped block to move towards the adjusting seat, at this time, the wedge-shaped block drives the movable top column to ascend through the wedge-shaped surface, and the movable top column levels the sand box through the supporting legs, thereby improving the stability of the leveling of the sand box.

[0011] Optionally, the driving member is a first hydraulic cylinder, the first hydraulic cylinder is arranged on the top surface of the vibrating table body, and the telescopic end of the first hydraulic cylinder is fixedly connected with one side of the wedge-shaped block.

[0012] By adopting the technical scheme, when the first hydraulic cylinder is started, the telescopic end of the first hydraulic cylinder drives the wedge-shaped block to move under the guidance of the adjusting seat, thereby improving the stability of the movement of the wedge-shaped block.

[0013] Optionally, the clamping assembly comprises a buckling piece, the buckling piece is swingingly arranged on the top surface of the vibrating table body, the bottom surface of the sand box is provided with a buckling lug, and the vibrating table body is provided with a swinging member for driving the buckling piece to swing.

[0014] By adopting the technical scheme, when it is needed to fix the sand box, the sand box is first placed on the vibrating table body, and then the buckling piece is driven to swing by the swinging member, at this time, the buckling piece abuts against the buckling lug, so that the sand box is fixed on the top surface of the vibrating table, thereby improving the stability of the fixing of the sand box on the vibrating table.

[0015] Optionally, the swinging member is a second hydraulic cylinder, the second hydraulic cylinder is arranged on the side wall of the vibrating table body, and the telescopic end of the second hydraulic cylinder is hingedly connected with one end of the buckling piece.

[0016] By adopting the technical scheme, when the second hydraulic cylinder is started, the telescopic end of the second hydraulic cylinder swings one end of the buckling part, thereby facilitating the stability of the buckling part.

[0017] Optionally, the vibrating table body comprises a base, a rubber spring and a table frame, the table frame is arranged above the base, the rubber spring is arranged between the base and the table frame, and the inner wall of the table frame is provided with a vibrating motor.

[0018] By adopting the technical scheme, when the vibrating motor is started, the vibration force of the vibrating motor is transmitted to the table frame, thereby facilitating the vibration of the sand box through the table frame, and under the action of the rubber spring, the vibration force is buffered to protect the vibrating table body from being damaged and improve the vibrating effect.

[0019] Optionally, the number of the fixed top columns is three, and the three fixed top columns are triangularly distributed.

[0020] By adopting the technical scheme, the three fixed top columns form a support plane of the sand box, thereby facilitating the stability of the sand box supported on the vibrating table body.

[0021] Optionally, the number of the movable top columns is three, and the three movable top columns are triangularly distributed.

[0022] By adopting the technical scheme, similarly, the three movable top columns form an adjustable support plane of the sand box, thereby facilitating the stability of the sand box leveling.

[0023] In summary, the present application has the following beneficial technical effects:

[0024] When the sand box needs to be vibrated, the sand box is first placed on the vibrating table body, and the fixed top column is aligned with one part of the supporting leg, and the movable top column is aligned with another part of the supporting leg. When the levelness of the sand box needs to be adjusted, the movable top column is raised by the adjusting assembly, and at this time, the movable top column abuts against another part of the supporting leg, and the sand box is leveled by the supporting leg. Finally, the sand box is fixed by the clamping assembly, thereby facilitating the leveling of the sand box, avoiding the inclination and shaking of the sand box during vibration, ensuring that the sand box is completely abutted against the top surface of the vibrating table body through the supporting leg, improving the vibration transmission efficiency, and improving the internal molding sand accumulation density of the sand box. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall structure schematic view of the large vibrating table for lost foam casting of the present application;

[0026] Figure 2 is the top view of the table frame of the present application;

[0027] Figure 3 yes Figure 1 An enlarged view of part A;

[0028] Figure 4 It is a front view of the sand box of this application.

[0029] Explanation of the accompanying reference numerals: 1. Vibrating table; 2. Sand box; 3. Fixed top column; 4. Movable top column; 5. Support leg; 6. Base; 7. Rubber spring; 8. Table frame; 9. Wedge block; 10. Adjustment seat; 11. Lifting groove; 12. Slide groove; 13. Wedge surface; 14. Buckling piece; 15. Articulated seat; 16. Buckle ear; 17. Second hydraulic cylinder; 18. First hydraulic cylinder. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1-4 This application is described in further detail.

[0031] Example:

[0032] See also Figure 1 and Figure 2 A large-scale vibrating table for lost foam casting comprises a vibrating table body 1, which is used to vibrate a sand box 2 to improve the density of the sand inside the sand box 2. The top surface of the vibrating table body 1 is fixedly connected with a fixed top column 3, wherein the number of the fixed top columns 3 is three, and the three fixed top columns 3 are evenly distributed in a triangular pattern. The top surface of the vibrating table body 1 is also movably installed with a movable top column 4, wherein the number of the movable top columns 4 is also three, and the three movable top columns 4 are evenly distributed in a triangular pattern, and the three movable top columns 4 are staggered with the three fixed top columns 3. The bottom surface of the sand box 2 is fixedly connected with a support leg 5, and the number of the support leg 5 is six, wherein the positions of three support legs 5 correspond to the positions of the three fixed top columns 3, and the positions of the other three support legs 5 correspond to the positions of the three movable top columns 4. The vibrating table body 1 is equipped with an adjustment component, which is used to drive the movable top column 4 to rise and fall. The vibration table body 1 is also equipped with a clamping assembly, which is used to fix the sand box 2 on the vibration table body 1.

[0033] In the initial state, the three movable top pillars 4 are positioned lower than the other three fixed top pillars 3 by a certain distance, and this distance is slightly greater than the maximum deformation of the compaction table 1 and the bottom of the sand box 2. This ensures that when the three triangularly distributed fixed top pillars 3 support the sand box 2 through the support legs 5, the movable top pillars 4 do not contact the bottom of the sand box 2.

[0034] When the sand inside the sand box 2 needs to be vibrated, first, the sand box 2 is placed on the vibrating table body 1, and three of the six feet 5 of the sand box 2 are respectively abutted against the top surfaces of the three fixed top columns 3, and the other three feet 5 correspond to the three movable top columns 4. When the sand box 2 is not flat on the support plane formed by the three fixed top columns 3, the movable top columns 4 are driven to rise by the adjusting assembly, at this time, the movable top columns 4 abut against the feet 5 corresponding to the unevenness, and finally the sand box 2 is fixed by the clamping assembly, so that the sand box 2 is fixed flat on the vibrating table body 1. When the vibrating table body 1 is started, the vibrating table body 1 vibrates the sand box 2, thereby improving the consistency of the compactness of the molding sand inside the sand box 2.

[0035] Referring to Figure 1 In order to improve the stability of the vibration of the vibrating table body 1, the vibrating table body 1 comprises a base 6, rubber springs 7 and a table frame 8, and the base 6 is fixed to the ground. The table frame 8 is installed above the base 6 and corresponds to the base 6. The rubber springs 7 are provided in plurality, and the plurality of rubber springs 7 are all installed between the base 6 and the table frame 8, one end of the plurality of rubber springs 7 is fixedly connected to the top surface of the base 6, and the other end of the plurality of rubber springs 7 is fixedly connected to the bottom surface of the table frame 8. The table frame 8 is also fixedly installed with a vibrating motor (not shown in the figure).

[0036] When the vibrating motor is started, the vibration force generated by the vibrating motor is transmitted to the table frame 8, and then transmitted to the sand box 2 through the table frame 8, thereby causing the sand box 2 to vibrate. At the same time, under the action of the plurality of rubber springs 7, the vibration force is buffered, so as to protect the vibrating table body 1 from being damaged and improve the vibrating effect.

[0037] Specifically, referring to Figure 1 and Figure 3 The adjusting assembly comprises a wedge-shaped block 9, the top surface of the vibrating table body 1 is fixedly connected with an adjusting seat 10, the top surface of the adjusting seat 10 is provided with a lifting groove 11, the movable top column 4 is liftingly installed in the lifting groove 11, and the top end of the movable top column 4 extends out of the top of the adjusting seat 10. One side of the adjusting seat 10 is provided with a sliding groove 12, the sliding groove 12 is in communication with the lifting groove 11, and the wedge-shaped block 9 is slidingly installed in the sliding groove 12. The bottom surface of the movable top column 4 is provided with a wedge surface 13, and the movable top column 4 cooperates with the wedge-shaped block 9 through the wedge surface 13.

[0038] In addition, in order to facilitate the movement of the wedge-shaped block 9, the vibrating table body 1 is also provided with a driving member, which is a first hydraulic cylinder 18, the first hydraulic cylinder 18 is fixedly installed on the top surface of the table frame 8, the extension end of the first hydraulic cylinder 18 extends into the adjusting seat 10, and the extension end of the first hydraulic cylinder 18 is fixedly connected with the wedge-shaped block 9.

[0039] When the first hydraulic cylinder 18 is started, the telescopic end of the first hydraulic cylinder 18 drives the wedge block 9 to move, the wedge block 9 drives the movable jacks 4 to rise through the wedge surface 13, and the movable jacks 4 abut against the legs 5 of the sand box 2, so as to level the sand box 2.

[0040] It is worth mentioning that the adjusting assembly can also be composed of a lead screw and a motor, or a connecting rod structure.

[0041] Specifically, referring to Figure 1 and Figure 4 , the clamping assembly comprises a buckling piece 14. The top surface of the table frame 8 is fixedly connected with a hinged seat 15, the buckling piece 14 is T-shaped, and the buckling piece 14 is hinged in the hinged seat 15. One end of the buckling piece 14 is a swinging end, and the other end is a pressing end. The bottom surface of the sand box 2 is fixedly connected with a buckling lug 16, and the buckling piece 14 presses the buckling lug 16 through the pressing end.

[0042] In addition, in order to facilitate the swinging of the buckling lug 16, the vibrating table body 1 is also provided with a swinging piece, which is a second hydraulic cylinder 17. The second hydraulic cylinder 17 is fixed to the side wall of the table frame 8, and the telescopic end of the second hydraulic cylinder 17 is hinged to the swinging end of the buckling piece 14.

[0043] When it is necessary to fix the sand box 2, the second hydraulic cylinder 17 is started, the telescopic end of the second hydraulic cylinder 17 drives the buckling piece 14 to swing, the buckling piece 14 in turn presses the buckling lug 16 through the pressing end, so that the sand box 2 is pressed and fixed on the top surface of the vibrating table body 1.

[0044] The working principle of a large vibrating table for lost foam casting:

[0045] When it is necessary to vibrate the sand in the sand box 2, first place the sand box 2 on the vibrating table body 1, and make three of the legs 5 of the sand box 2 abut against the top surfaces of the three fixed jacks 3, and the other three legs 5 correspond to the three movable jacks 4.

[0046] When the sand box 2 is not level on the support plane formed by the three fixed jacks 3, start the first hydraulic cylinder 18, the telescopic end of the first hydraulic cylinder 18 drives the wedge block 9 to move, the wedge block 9 drives the movable jacks 4 to rise through the wedge surface 13, and the movable jacks 4 abut against the legs 5 of the sand box 2, so as to level the sand box 2.

[0047] When it is necessary to fix the sand box 2, the second hydraulic cylinder 17 is started, the telescopic end of the second hydraulic cylinder 17 drives the buckling piece 14 to swing, the buckling piece 14 in turn presses the buckling lug 16 through the pressing end, so that the sand box 2 is pressed and fixed on the top surface of the vibrating table body 1.

[0048] After the sand box 2 is leveled and fixed, when the vibration motor is started, the vibration force generated by the vibration motor is transmitted to the table frame 8, and then transmitted to the sand box 2 through the table frame 8, so as to make the sand box 2 vibrate.

[0049] In summary, by adjusting the leveling assembly, the sand box 2 is leveled, the inclination and shaking of the sand box 2 during vibration are avoided, the sand box 2 is guaranteed to completely abut against the top surface of the vibration table body 1 through the supporting legs 5, and the vibration transmission rate is improved.

[0050] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A large-scale jolter for use in lost foam casting, comprising a jolter body (1) for jolting a sand mold (2), characterized by: The top surface of the vibrating table body (1) is provided with fixed top columns (3), the bottom surface of the sand box (2) is provided with a plurality of supporting legs (5), the sand box (2) is abutted to the top surface of the fixed top column (3) through a part of the supporting legs (5), the top surface of the vibrating table body (1) is further provided with movable top columns (4), the movable top columns (4) correspond to another part of the supporting legs (5), the vibrating table body (1) is provided with an adjusting assembly for driving the movable top columns (4) to ascend and descend, and the vibrating table body (1) is further provided with a clamping assembly for fixing the sand box (2).

2. A large-scale jolter for use in lost foam casting according to claim 1, characterized in that: The adjusting assembly comprises a wedge-shaped block (9), the top surface of the vibrating table body (1) is provided with an adjusting seat (10), the movable top columns (4) are arranged in the adjusting seat (10) to ascend and descend, the bottom end of the movable top column (4) is provided with a wedge surface (13), the wedge-shaped block (9) is slidingly arranged in the adjusting seat (10), and the movable top column (4) is matched with the wedge-shaped block (9) through the wedge surface (13).

3. A large-scale jolter for use in lost foam casting according to claim 2, characterized in that: The driving member is a first hydraulic cylinder (18), the first hydraulic cylinder (18) is arranged on the top surface of the vibrating table body (1), and the telescopic end of the first hydraulic cylinder (18) is fixedly connected with one side of the wedge-shaped block (9).

4. The large-scale jolter for lost foam casting according to claim 1, characterized in that: The clamping assembly comprises a buckling piece (14), the buckling piece (14) is swingingly arranged on the top surface of the vibrating table body (1), the bottom surface of the sand box (2) is provided with a buckling lug (16), and the vibrating table body (1) is provided with a swinging member for driving the buckling piece (14) to swing.

5. A large-scale jolt table for lost foam casting according to claim 4, characterized in that: The swinging member is a second hydraulic cylinder (17), the second hydraulic cylinder (17) is arranged on the side wall of the vibrating table body (1), and the telescopic end of the second hydraulic cylinder (17) is hingedly connected with one end of the buckling piece (14).

6. A large-scale jolter for use in lost foam casting according to claim 1, characterized in that: The vibrating table body (1) comprises a base (6), a rubber spring (7) and a table top frame (8), the table top frame (8) is arranged above the base (6), the rubber spring (7) is arranged between the base (6) and the table top frame (8), and the inner wall of the table top frame (8) is provided with a vibrating motor.

7. The large-scale jolter for lost foam casting according to claim 1, characterized in that: The number of the fixed top columns (3) is three, and the three fixed top columns (3) are triangularly distributed.

8. A large-scale jolter for use in lost foam casting according to claim 1, characterized in that: The number of the movable top columns (4) is three, and the three movable top columns (4) are triangularly distributed.

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