A large castings turning device

Abstract

The utility model discloses a large -scale casting turning device, including base, the upper surface both ends of base symmetry is provided with at least two fixed blocks, is provided with the guide rod between two corresponding fixed blocks at the both ends of base, is provided with two trapezoidal seat on the guide rod and slides, the upper surface of trapezoidal seat is installed T -shaped piece, and the upper surface of T -shaped piece is provided with U -shaped groove. Large -scale casting only needs to install the rotating shaft or rotating column etc. at its both ends, then through hoisting equipment places it in the U -shaped groove of T -shaped piece, can form a stable gyrostat. The turning process does not need complicated hoisting positioning and repeated adjustment, only needs to exert a suitable initial force (such as human power or simple mechanical power), can utilize gravity or inertia and realize the 180 degree turning of casting. Significantly shorten the turning time, simplify the operation process, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of large casting processing technology, specifically a large casting flipping device. Background Technology

[0002] In the machining of large castings (such as machine tool beds, large valve bodies, and wind power equipment components), multiple surfaces typically require machining. Due to the large size and heavy weight of the castings, the commonly used method in the industry for flipping them involves using hoisting equipment (such as overhead cranes) with specialized lifting tools or wire rope slings. The lifting tools or ropes are first secured to the casting, and then the hoisting equipment lifts the casting off the worktable or ground. Operators control the hoist's lifting and movement, supplemented by manual pushing or prying, to slowly flip the casting in mid-air. After flipping, the casting is carefully placed back onto the worktable or support frame.

[0003] This traditional hoisting and flipping method has the following drawbacks: the flipping process requires close cooperation between the crane operator and ground personnel, repeatedly adjusting the lifting point position and lifting height, which is cumbersome and time-consuming, seriously affecting production efficiency; large castings have poor stability when flipped in the air, and are prone to swaying, tilting, or even falling out of control, posing a serious safety threat to operators and surrounding equipment. Manual assistance in pushing and prying can also easily cause crushing and crushing accidents, posing serious safety hazards; at the same time, the entire flipping process is highly dependent on overhead cranes or overhead cranes, occupying a lot of equipment and space, and affecting the material flow of other processes in the workshop. Therefore, we propose a large casting flipping device. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a large casting flipping device that shortens the flipping time, simplifies the operation process, improves production efficiency, eliminates the related personal injury risks, and greatly improves safety, thus effectively solving the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a large casting turning device, comprising a base, wherein at least two fixing blocks are symmetrically arranged at both ends of the upper surface of the base, and a guide rod is arranged between the two corresponding fixing blocks at both ends of the base, wherein two trapezoidal seats are slidably arranged on the guide rod, and a T-shaped block is installed on the upper surface of the trapezoidal seat, and a U-shaped groove is formed on the upper surface of the T-shaped block.

[0006] As a preferred technical solution of this utility model, the upper surfaces of both ends of the T-shaped block are provided with smooth countersunk holes, and the upper surfaces of both ends of the trapezoidal seat are provided with screw holes corresponding to the smooth countersunk holes. Fixing bolts are provided in the smooth countersunk holes and screw holes.

[0007] As a preferred embodiment of this utility model, the lower surface of the base is evenly provided with several sets of wheel frames, and rollers are rotatably mounted on the wheel frames.

[0008] As a preferred embodiment of this utility model, a foot brake is installed on the wheel frame located at the end of the base.

[0009] As a preferred technical solution of this utility model, it also includes a clamp, which includes a rotating column rotatably disposed in a U-shaped groove, a connecting plate installed on the side surface of the rotating column, and several clamping plates provided on the upper and lower sides of the side surface of the connecting plate.

[0010] As a preferred technical solution of this utility model, the clamps on the two connecting plates are arranged in an alternating manner, and the clamps on one connecting plate can be inserted between the clamps on the other connecting plate.

[0011] As a preferred embodiment of this utility model, a rubber pad is glued to one side of the opposite side of the clamping plate.

[0012] As a preferred embodiment of this utility model, the side surface of the clamp is provided with a plurality of rope-threading holes.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Large castings only require the installation of pivots or rotating columns at both ends. They are then placed into the U-shaped grooves of a T-block using hoisting equipment, forming a stable rotating body. The flipping process eliminates the need for complex hoisting, positioning, and repeated adjustments. Only a suitable initial force (such as manual pushing or simple mechanical assistance) is applied, and gravity or inertia is used to achieve a 180-degree flip. This significantly reduces flipping time, simplifies the operation process, and improves production efficiency.

[0015] 2. The flipping process takes place on a stable support system composed of a base, trapezoidal seat, and T-shaped blocks near the ground. This results in a low center of gravity and excellent stability for the casting, completely eliminating the risk of loss of control and fall caused by the casting being suspended and swaying in the air. Furthermore, it eliminates the need for personnel to perform dangerous prying operations while the casting is suspended, fundamentally removing the associated risks of personal injury and significantly improving safety.

[0016] 3. The flipping operation is mostly completed on the ground, which reduces the reliance on large lifting equipment such as overhead cranes and gantry cranes, while saving operating space and not affecting the material flow of other processes in the workshop.

[0017] 4. The trapezoidal seats on both sides of the device can slide along the guide rod, making it easy to adjust the distance between the two T-blocks to accommodate large castings of different lengths, thus improving versatility. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the right-side structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the present invention and its matching fixture;

[0022] Figure 5 This is a top view of the fixture of this utility model.

[0023] In the diagram: 1. Base, 2. Fixing block, 3. Guide rod, 4. Trapezoidal seat, 5. T-shaped block, 6. U-shaped groove, 7. Fixing bolt, 8. Drive motor, 9. Drive sprocket, 10. Driven sprocket, 11. Synchronous chain, 12. Wheel frame, 13. Roller, 14. Foot brake, 15. Rotating column, 16. Connecting plate, 17. Clamping plate, 18. Rope hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 This utility model provides a technical solution: a large casting flipping device, including a base 1, at least two fixing blocks 2 are symmetrically arranged at both ends of the upper surface of the base 1, and a guide rod 3 is arranged between the two corresponding fixing blocks 2 at both ends of the base 1. Two trapezoidal seats 4 are slidably arranged on the guide rod 3. The trapezoidal seats 4 can slide along the guide rod 3 to conveniently adjust the distance between the two T-shaped blocks 5 to adapt to large castings of different lengths and improve versatility.

[0026] The cross-section of trapezoidal base 4 is an isosceles trapezoid with the upper base shorter than the lower base, which can improve the stability of the support.

[0027] A T-shaped block 5 is mounted on the upper surface of the trapezoidal base 4. A U-shaped groove 6 is formed on the upper surface of the T-shaped block 5. Large castings only need to have rotating shafts or columns installed at both ends, and then be placed into the U-shaped groove 6 of the T-shaped block 5 using hoisting equipment to form a stable rotating body. The flipping process does not require complex hoisting positioning and repeated adjustments; only a suitable initial force (such as manual pushing or simple mechanical assistance) is applied, and gravity or inertia can be used to achieve a 180-degree flip of the casting. This significantly shortens the flipping time, simplifies the operation process, and improves production efficiency.

[0028] This device is particularly useful for large castings with shafts on both sides, such as cast runners of large mixed-flow and axial-flow water turbines (cast the upper crown, lower ring, and blades integrally or separately), cast rotor core supports of large motors or integral cast rotors of certain special motors (such as some wind turbine rotors), support rollers of large rotary kilns and dryer cylinders, as well as some ultra-large, complex-shaped or special-center-of-gravity castings. For safe hoisting, cylindrical lifting lugs or shafts are specially cast (or machined) at both ends or symmetrical positions of the center of gravity during casting.

[0029] In a preferred embodiment, the upper surfaces of both ends of the T-block 5 are provided with smooth countersunk holes, and the upper surfaces of both ends of the trapezoidal base 4 are provided with screw holes corresponding to the smooth countersunk holes. Fixing bolts 7 are installed in the smooth countersunk holes and screw holes. The T-block 5 is installed on the trapezoidal base 4 by fixing bolts 7. The T-block 5 of the appropriate height can be replaced according to the width of the large casting and installed on the trapezoidal base 4, so that the large casting can be flipped on the device, further improving the versatility.

[0030] An optional technical solution is that a number of wheel frames 12 are evenly arranged on the lower surface of the base 1, and rollers 13 are rotatably arranged on the wheel frames 12. The rollers 13 can be used to move the device and large castings conveniently, and can flexibly move the device and large castings before and after flipping, further reducing the space occupied during the flipping process.

[0031] Alternatively, a foot brake 14 is installed on the wheel frame 12 at the end of the base 1 to fix the roller 13, thereby fixing the entire device to the ground and improving the stability of the flipping process.

[0032] Optionally, two guide rods 3 are provided, with a screw in the middle of each guide rod 3. The side surface of the trapezoidal seat 4 has screw holes corresponding to the guide rod 3. The screw holes on the two trapezoidal seats 4 have opposite thread directions, and the thread directions on both sides of the screw on the guide rod 3 are also correspondingly opposite. The end of the guide rod 3 is rotatably mounted on a fixed block 2. One of the fixed blocks 2 has a drive motor 8 mounted on its side surface. The drive motor 8 is a commonly used geared motor, controlled by an external control switch and powered by an external power supply. The output shaft of the drive motor 8 passes through the side surface of the fixed block 2 and connects to the corresponding guide rod 3. On the opposite side of the fixed block 2 where the drive motor 8 is located, a drive sprocket 9 is fixedly connected to the other end of the guide rod 3. A corresponding driven sprocket 10 is rotatably mounted on the other fixed block 2. A synchronous chain 11 is provided between the drive sprocket 9 and the driven sprocket 9. The drive motor 8 drives the active sprocket 9 to rotate via the guide rod 3. The active sprocket 9 drives the driven sprocket 10 to rotate via the synchronous chain 11, thereby causing the two guide rods 3 to rotate synchronously. Since the threads on both sides of the guide rod 3 and the threads on the two trapezoidal seats 4 are opposite, the two trapezoidal seats 4 can move towards each other or away from each other when the guide rod 3 rotates, thereby automatically adjusting the distance between the two trapezoidal seats 4 to adapt to large castings of different lengths and improve versatility.

[0033] The drive motors and other components used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, control methods and circuit connections are all well-known technologies and will not be described in detail here.

[0034] In a preferred embodiment, the device further includes a clamp, which includes a rotating column 15 rotatably disposed within a U-shaped groove 6. A connecting plate 16 is mounted on the side surface of the rotating column 15, and several clamping plates 17 are provided on both the upper and lower sides of the side surface of the connecting plate 16. The large casting is clamped by the cooperation of the clamping plates 17, and then rotated by the rotation of the rotating column 15. When a large casting that is difficult to install a rotating shaft or rotating column needs to be rotated, it can be clamped by the corresponding clamp to achieve the rotation.

[0035] In a further preferred technical solution, the clamping plates 17 on the two connecting plates 16 are staggered, and the clamping plate 17 on one connecting plate 16 can be inserted between the clamping plates 17 on the other connecting plate 16. The staggered clamping plates 17 can prevent the clamping plates 17 on the other connecting plate 16 from being affected when the trapezoidal seat 4 moves, thereby realizing the clamping and flipping operations of large castings of different lengths.

[0036] In a further preferred embodiment, the side surface of the clamping plate 17 is evenly provided with a plurality of rope holes 18, and the rope holes 18 on the two sets of clamping plates 17 are arranged opposite to each other. After the clamping fixture is tightened, a steel wire rope can be passed through the rope holes 18 to further fix the large casting and improve the stability during flipping.

[0037] Furthermore, a rubber pad is glued to the opposite side surface of the clamping plate 17. The rubber pad can protect the clamping plate 17 and the surface of the large casting, and at the same time increase the friction, thereby further improving the stability during flipping.

[0038] The large casting flipping operation process includes the following steps:

[0039] S1) Device positioning and fixing: Push the device to the working area via the rollers 13 at the bottom of the base 1, step on the foot brake 14 installed on the end wheel frame 12, lock the rollers 13, and ensure that the device is stably parked on the ground;

[0040] S2) Adjusting the support spacing: The operator starts the drive motor 8 through the external control switch. The output shaft of the drive motor 8 drives the screw 3 connected to it to rotate. The screw 3 drives another screw 3 to rotate synchronously through the driving sprocket 9, the synchronous chain 11 and the driven sprocket 10. Since the threads on both sides of the middle screw 3 are opposite, and the threads on the screw holes on the two trapezoidal seats 4 are also opposite, when the screw 3 rotates, the two trapezoidal seats 4 automatically move towards or away from each other. Observe the position of the trapezoidal seats 4 and adjust their spacing to be slightly greater than the center distance between the two ends of the casting to be flipped, that is, turn off the drive motor 8.

[0041] S3) Adjust the flipping height: Select and install the T-block 5 corresponding to the width of the casting to ensure that the large casting can be flipped 180° on the device. Fix the T-block 5 to the trapezoidal base 4 with the fixing bolts 7.

[0042] S4) Workpiece preparation: Ensure that both ends of the large casting have been securely installed with rotating shafts or rotating columns (functional journals, process dummy shafts or pre-cast hoisting shafts), clean the surface of the rotating shaft and the U-shaped groove 6 on the T-block 5 to ensure that the contact surfaces are clean;

[0043] S5) Lifting the workpiece to the top of the device: Using a workshop crane or overhead crane, with appropriate lifting tools (such as slings and special hooks), the large casting is lifted steadily and transported to the top of the device. The height is adjusted so that the two ends of the casting are slightly higher than the opening of the U-shaped groove 6 on the T-blocks 5 on both sides.

[0044] S6) Precise positioning: Slowly lower the casting while fine-tuning the crane position to ensure that the shaft at one end of the casting is accurately aligned and falls into the U-shaped groove 6 on one side. Keep that end stable, continue to lower and fine-tune the crane to accurately place the shaft at the other end of the casting into the U-shaped groove 6 on the other side, so that the weight of the casting is completely supported by the U-shaped grooves 6 on both sides. At this time, the casting and the shafts at both ends form a stable "rotating body", and its axis of rotation is determined by the two U-shaped grooves.

[0045] S7) Apply initial overturning force: After removing the lifting equipment and the crane, the operator applies a steady push force on the side of the casting (near one end or the middle) in the direction in which the casting needs to be overturned (usually with the surface to be machined facing up); if the casting is extremely heavy, a pry bar (with wooden blocks placed under it to protect the casting) or a small hydraulic jacking device can be used to provide initial push force at a suitable position.

[0046] S8) Gravity-assisted flipping: Under the initial thrust, the casting begins to rotate around the axis formed by the two ends of its rotation axis. Once the center of gravity of the casting passes the highest point (usually between 45° and 90°), gravity will become the main driving force, causing the casting to accelerate downward rotation.

[0047] S9) Control the flipping to the correct position: The operator must follow the rotation of the casting and apply appropriate reverse resistance (such as gently pressing with hands or wooden blocks) when the casting is close to completing the 180° flip (i.e. the other side is about to face up), or use the stability of the device itself to make the casting stop smoothly and slowly at the target position (i.e. the newly machined surface is facing up).

[0048] S10) Remove the workpiece: Reattach the overhead crane, gently lift the casting so that the two ends of its pivot are disengaged from the U-shaped groove 6, and then transport the casting to the next process (such as the machining table) or storage area.

[0049] Operating procedures for special workpieces (without a rotating shaft) (using fixtures)

[0050] S1) Install the clamp:

[0051] Place the two rotating columns 15 into the U-shaped grooves 6 of the T-shaped blocks 5 on both sides. Hoist the large casting between the two sets of staggered clamping plates 17. Adjust the spacing of the trapezoidal seats 4 so that the clamping plates 17 on both sides can fit tightly against the sides of the casting.

[0052] S2) Clamping the workpiece:

[0053] During the adjustment of the spacing of the trapezoidal seats 4, ensure that the clamp 17 on one connecting plate 16 is inserted into the gap of the clamp 17 on the other connecting plate 16. Then, pass the wire rope through the rope holes 18 on the two sets of clamps 17 in sequence, tighten it and fix it with rope clips to form a bundled reinforcement.

[0054] Check the clamping force and the reliability of the fixation.

[0055] S3) Flip operation:

[0056] Apply an initial thrust to the casting or the fixture connecting plate 16. The casting, together with the fixture (rotating column 15 + connecting plate 16 + clamping plate 17), rotates as a whole within the U-shaped groove 6 about the axis of the rotating column 15, completing a 180° flip. Subsequent steps are the same as the aforementioned standard procedure.

[0057] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large casting turning device, comprising a base (1), characterized in that: At least two fixing blocks (2) are symmetrically arranged at both ends of the upper surface of the base (1). A guide rod (3) is arranged between the two corresponding fixing blocks (2) at both ends of the base (1). Two trapezoidal seats (4) are slidably arranged on the guide rod (3). A T-shaped block (5) is installed on the upper surface of the trapezoidal seat (4). A U-shaped groove (6) is opened on the upper surface of the T-shaped block (5).

2. The large casting turning device according to claim 1, characterized in that: The upper surfaces of both ends of the T-shaped block (5) are provided with smooth countersunk holes, and the upper surfaces of both ends of the trapezoidal seat (4) are provided with screw holes corresponding to the smooth countersunk holes. Fixing bolts (7) are provided in the smooth countersunk holes and screw holes.

3. The large casting turning device according to claim 1, characterized in that: The lower surface of the base (1) is evenly provided with several sets of wheel frames (12), and rollers (13) are rotatably provided on the wheel frames (12).

4. A large casting turning device according to claim 3, characterized in that: A foot brake (14) is installed on the wheel frame (12) located at the end of the base (1).

5. A large casting turning device according to claim 1, characterized in that: It also includes a clamp, which includes a rotating column (15) rotatably disposed in a U-shaped groove (6), a connecting plate (16) is installed on the side surface of the rotating column (15), and several clamping plates (17) are provided on the upper and lower sides of the side surface of the connecting plate (16).

6. A large casting turning device according to claim 5, characterized in that: The clamps (17) on the two connecting plates (16) are arranged alternately, and the clamps (17) on one connecting plate (16) can be inserted between the clamps (17) on the other connecting plate (16).

7. A large casting turning device according to claim 5, characterized in that: A rubber pad is glued to the opposite side surface of the clamp (17).

8. A large casting turning device according to claim 5, characterized in that: The side surface of the clamp (17) is evenly provided with several rope holes (18).

Images