Device for overturning workpiece

Abstract

The utility model provides a device for overturning a workpiece. The device comprises a base, an overturning table and an oil cylinder. The base is installed on the ground, the overturning table is rotationally connected to the base, a clamp is arranged on the overturning table and used for fixing a workpiece to be overturned to the overturning table, the telescopic end of the oil cylinder is connected with the overturning table, and the fixed end of the oil cylinder is connected with the base; the oil cylinder pushes the overturning table and the to-be-overturned workpiece fixed to the overturning table to rotate and ascend around the base, when the overturning table and the to-be-overturned workpiece fixed to the overturning table rotate to the highest point, oil feeding of the oil cylinder is stopped, the oil return flow of the oil cylinder is controlled to be smaller than a preset threshold value, and the overturning table and the to-be-overturned workpiece fixed to the overturning table overcome resistance of the oil cylinder through the gravity of the oil cylinder to slowly rotate and descend around the base. And the to-be-overturned workpiece falls to the ground to finish overturning. The device is simple in structure, when a workpiece to be overturned is fixed on the overturning table, the overturning table is pushed by the oil cylinder to rotate and ascend to the highest point, the workpiece slowly descends from the highest point by means of the gravity of the workpiece, and the whole overturning process is simple and easy to operate.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece flipping equipment, and in particular to a device for workpiece flipping. Background Art

[0002] With the rapid development of society, industries such as wind power generation, automobile industry, agricultural machinery, and aerospace are also booming. These industries often need to weld some workpieces during the manufacturing process, especially large workpieces. In order to improve their work efficiency and welding quality, these large workpieces need to be frequently turned over.

[0003] In the prior art, the common in-situ flipping tooling for flipping large workpieces not only removes the lifting process but also achieves a 180° flip. These large workpiece flipping processes often require the combined operation of multiple cylinders. Specifically, the first cylinder lifts and flips the large workpiece to approximately 90°, then connects to the second cylinder. The first cylinder is then removed and supported, and then the second cylinder operates again to guide the large workpiece through the 180° flip. As can be seen, the existing in-situ flipping tooling is complex to manufacture and the operation process is relatively cumbersome. Furthermore, removing the pins can be labor-intensive for workers, making it prone to operational errors and potentially causing serious accidents.

[0004] Therefore, how to make the workpiece turning tooling structure simple and easy to operate has become a technical problem to be solved. Utility Model Content

[0005] The present application provides a device for turning a workpiece to solve the problems of existing in-situ turning tooling, which is complex to manufacture and has a tedious operation process, and the high labor intensity and easy operation errors caused by the removal of the pin. The present application also provides a workpiece turning method.

[0006] The present application provides a device for flipping a workpiece, the device comprising: a base, a flip table and a cylinder; the base is used to be installed on the ground, the flip table is rotatably connected to the base, a clamp is provided on the flip table, the clamp is fixed on the flip table, the clamp is used to fix the workpiece to be flipped on the flip table, the telescopic end of the cylinder is connected to the flip table, and the fixed end of the cylinder is connected to the base; the cylinder is used to push the flip table and the workpiece to be flipped fixed on the flip table to rotate and rise around the base, when the flip table rotates to the highest point, the cylinder stops supplying oil, and controls the return oil flow in the cylinder to be less than a preset threshold, the flip table and the workpiece to be flipped fixed on the flip table rely on their own gravity to overcome the resistance of the cylinder and slowly rotate and descend around the base until the workpiece to be flipped falls to the ground to complete the flipping.

[0007] Optionally, the fixture includes a shaft seat, a bent plate and a lead screw; the shaft seat is fixed on the turning table, and a vertical fixed shaft is provided on the shaft seat, and one end of the fixed shaft is fixed to the shaft seat; the first end of the bent plate is horizontally rotatably mounted on the fixed shaft, and the second end of the bent plate is provided with a nut, and the lead screw is connected to the nut to realize the up and down movement of the lead screw, and the lead screw is used to fix the workpiece to be flipped on the turning table by moving up and down.

[0008] Optionally, a sleeve is provided at the first end of the bent plate, and the sleeve is loosely mounted on the fixed shaft. A through hole is provided on the fixed shaft above the sleeve, and the through hole is used to insert a limit pin to limit the upward movement of the sleeve along the vertical direction of the fixed shaft.

[0009] Optionally, a fixing platform is provided at one end of the lead screw, and the fixing platform is fixed to one end of the lead screw, and the bottom surface of the fixing platform is used to fix the workpiece to be flipped on the flipping platform.

[0010] Optionally, the base is a long strip structure, and screw holes are provided on both sides of the bottom surface of the long side of the long strip structure, and the screw holes are used to insert screws to rigidly connect the base to the ground through the screws; the left and right ends of the base are respectively provided with fixing frames, and the left and right ends of the flip table are respectively provided with connecting rods, and the connecting rods are rotatably connected to the fixing frames through a rotating shaft.

[0011] Optionally, the fixing frame includes a first fixing frame plate and a second fixing frame plate, a gap is provided between the first fixing frame plate and the second fixing frame plate, and the rotating shaft is arranged in the gap.

[0012] Optionally, two oil cylinders are included, and the two oil cylinders are symmetrically arranged on both sides of the turning platform, and both of the two oil cylinders are single-acting oil cylinders.

[0013] Optionally, the turning platform includes a carrier frame and a support frame, wherein the carrier frame is located on the support frame and connected to the support frame;

[0014] When the workpiece to be flipped falls to the ground and is flipped, the clamp is rotated to separate the flipped workpiece from the flip table, and the oil cylinder pushes the flip table to rotate and rise around the base. When the flip table rotates to the highest point, the oil cylinder stops supplying oil, and the flip table relies on the gravity of the carrier and the support frame to overcome the resistance of the oil cylinder and slowly rotates and descends around the base until the flip table falls to the ground.

[0015] Compared with the prior art, this application has the following advantages:

[0016] The present application provides a device for flipping a workpiece, the device comprising: a base, a flip table and a cylinder; the base is used to be installed on the ground, the flip table is rotatably connected to the base, a clamp is provided on the flip table, the clamp is fixed on the flip table, the clamp is used to fix the workpiece to be flipped on the flip table, the telescopic end of the cylinder is connected to the flip table, and the fixed end of the cylinder is connected to the base; the cylinder is used to push the flip table and the workpiece to be flipped fixed on the flip table to rotate and rise around the base, when the flip table rotates to the highest point, the cylinder stops supplying oil, and controls the return oil flow in the cylinder to be less than a preset threshold, the flip table and the workpiece to be flipped fixed on the flip table rely on their own gravity to overcome the resistance of the cylinder and slowly rotate and descend around the base until the workpiece to be flipped falls to the ground to complete the flipping.

[0017] It can be seen that the device provided in the present application includes a base, a turning table and a cylinder. Its structure is simple, and the turning table and the workpiece to be turned fixed on the turning table are pushed to rotate by the cylinder. When the turning table and the workpiece to be turned rotate to the highest point, that is, when the turning table and the workpiece to be turned flipped to 90°, the cylinder stops supplying oil, and the turning table and the workpiece to be turned fixed on the turning table slowly rotate downward from the highest point by relying on their own gravity until the workpiece to be turned falls to the ground and completes a 180° flip. It can be seen that the entire flipping process is simple and relatively easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a device for flipping a workpiece provided in an embodiment of the present application (with a workpiece to be flipped installed).

[0019] Figure 2 It is a partial schematic diagram of a device for flipping a workpiece provided in an embodiment of the present application (with a workpiece to be flipped installed).

[0020] Figure 3 This is a schematic diagram of the flipping process of a device for flipping a workpiece provided in an embodiment of the present application (the workpiece to be flipped is not installed).

[0021] Figure 4 It is a schematic structural diagram of the clamp provided in an embodiment of the present application.

[0022] Figure 5 It is a cross-sectional view of the oil cylinder provided in an embodiment of the present application.

[0023] Figure 6 This is a schematic diagram of the flipping process of a device for flipping a workpiece provided in an embodiment of the present application (installing the workpiece to be flipped).

[0024] Figure 7This is a schematic diagram of the flipping process of a device for flipping a workpiece provided in an embodiment of the present application (the workpiece to be flipped is not installed and the center of gravity G1 of the device is marked).

[0025] Figure 8 This is a hydraulic system diagram provided in an embodiment of the present application.

[0026] Reference numerals:

[0027] 10: Base; 101: Bottom; 1011: Screw hole; 102: Fixing frame; 1021: First fixing frame plate; 1022: Second fixing frame plate; 1023: Rotating shaft;

[0028] 20: turning table; 201: carrying frame; 2011: connecting rod; 202: supporting frame;

[0029] 30: fixture; 301: shaft seat; 3011: fixed shaft; 3011-a: through hole; 3011-b: limit pin;

[0030] 302: bent plate; 3021: sleeve; 3022: nut; 303: lead screw; 3031: fixed platform;

[0031] 40: Cylinder; 401: Telescopic end; 402: Fixed end;

[0032] 50: Workpiece to be flipped;

[0033] 60: Hydraulic system; 601: Hydraulic oil tank; 602: Oil filter; 603: Hydraulic pump; 604: Overflow valve; 605: Solenoid reversing valve; 606: Hydraulically controlled one-way valve; 607: One-way throttle valve; 608: Electronically controlled balancing valve; 609: Solenoid valve; 610: Speed regulating valve. DETAILED DESCRIPTION

[0034] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific implementations disclosed below.

[0035] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0037] In the prior art, the common in-situ flipping tooling used in the flipping process of large workpieces not only removes the lifting operation process but also achieves a 180° flip. The flipping process of these large workpieces often requires the combined operation of multiple cylinders. Specifically, the first cylinder lifts and flips the large workpiece to approximately 90°, then connects to the second cylinder. The first cylinder is then removed and supported, and then the second cylinder operates again to guide the large workpiece through the 180° flip. It can be seen that the existing in-situ flipping tooling is complex to manufacture and the operation process is relatively cumbersome. Furthermore, the removal of the pin shaft causes high labor intensity for workers, making it prone to operational errors and potentially causing serious accidents. Therefore, how to make the workpiece flipping tooling simple in structure and easy to operate has become a technical problem to be solved.

[0038] To solve the above problems, the present application provides a device for flipping a workpiece, the device comprising: a base, a flip table and a cylinder; the base is used to be installed on the ground, the flip table is rotatably connected to the base, a clamp is provided on the flip table, the clamp is fixed on the flip table, the clamp is used to fix the workpiece to be flipped on the flip table, the telescopic end of the cylinder is connected to the flip table, and the fixed end of the cylinder is connected to the base; the cylinder is used to push the flip table and the workpiece to be flipped fixed on the flip table to rotate and rise around the base, when the flip table rotates to the highest point, the cylinder stops supplying oil, and controls the return oil flow in the cylinder to be less than a preset threshold, the flip table and the workpiece to be flipped fixed on the flip table rely on their own gravity to overcome the resistance of the cylinder and slowly rotate and descend around the base until the workpiece to be flipped falls to the ground to complete the flipping.

[0039] It can be seen that the device provided in the present application includes a base, a turning table and a cylinder. Its structure is simple, and the turning table and the workpiece to be turned fixed on the turning table are pushed to rotate by the cylinder. When the turning table and the workpiece to be turned rotate to the highest point, that is, when the turning table and the workpiece to be turned flipped to 90°, the cylinder stops supplying oil, and the turning table and the workpiece to be turned fixed on the turning table rely on their own gravity to slowly rotate downward from the highest point until the workpiece to be turned falls to the ground and completes a 180° flip. It can be seen that the flipping process is simple and relatively easy to operate.

[0040] Next, we will combine Figure 1-8A device for turning over a workpiece provided in this application is described in detail.

[0041] As is well known, industries such as wind power generation, automobiles, agricultural machinery, and aerospace often require welding of workpieces during the manufacturing process. In particular, the welding of large workpieces requires frequent flipping. Large workpieces generally refer to workpieces that are relatively large and heavy. The workpieces in the device for workpiece flipping provided in this application are large workpieces, and the workpieces to be flipped, which are fixed to the flipping table, are also large workpieces. Of course, it is not excluded that the device for workpiece flipping provided in this application can flip small and medium-sized workpieces, or flip batches of small and medium-sized workpieces.

[0042] like Figure 1 The figure shows a schematic diagram of the structure of a device on which a workpiece to be flipped is mounted. The present application provides a device for flipping a workpiece, comprising: a base 10, a flipping platform 20, and a cylinder 40. The base 10 is mounted on the ground, the flipping platform 20 is rotatably connected to the base 10, and a fixture 30 is provided on the flipping platform 20. The fixture 30 is fixed to the flipping platform 20 and is used to secure the workpiece 50 to be flipped to the flipping platform 20. The telescopic end 401 of the cylinder is connected to the flipping platform 20, and the fixed end 402 of the cylinder is connected to the base 10.

[0043] like Figure 1 and Figure 2 As shown, the base 10 is an elongated structure with screw holes 1011 provided along both sides of the long bottom surface 101 of the elongated structure. These screw holes 1011 are used to insert screws, thereby rigidly connecting the base 10 to the ground. The left and right ends of the base 10 are respectively provided with fixing frames 102. The left and right ends of the flip table are respectively provided with connecting rods 2011. These connecting rods 2011 are rotatably connected to the fixing frames 102 via rotating shafts 1023.

[0044] like Figure 1As shown, the base 10 is a long strip structure, and the long strip structure includes a bottom surface 101 and a long plate, and the bottom surface 101 is located below the long plate and fixedly connected to the long plate. The bottom surface 101 and the long plate can be integrally formed, or they can be fixed by other methods such as welding. Screw holes 1011 are provided on both sides of the long side bottom surface 101 of the long strip structure. The positions of the screw holes 1011 provided on both sides can be symmetrical or asymmetrical, and the spacing between adjacent screw holes 1011 can be equal or unequal. Therefore, there is no restriction on the specific method of providing the screw holes 1011 on both sides of the long side bottom surface 101 of the long strip structure, as long as the screws are inserted into the screw holes 1011, the base 10 can be rigidly connected to the ground. Of course, the screws in the embodiment of the present application can be anchor screws or other fasteners.

[0045] like Figure 2 As shown, fixed frames 102 are provided at the left and right ends of the long strip structure base. The fixed frames 102 include a first fixed frame plate 1021 and a second fixed frame plate 1022. A gap is defined between the first fixed frame plate 1021 and the second fixed frame plate 1022. A rotating shaft 1023 is provided within the gap to connect the first fixed frame plate 1021 and the second fixed frame plate 1022. The first fixed frame plate 1021 and the second fixed frame plate 1022 are connected by the rotating shaft 1023. The rotating shaft 1023 is also rotatably connected to the connecting rod 2011 on the flip platform. The flip platform has a connecting rod 2011 provided at each end, that is, the connecting rod 2011 is connected to its corresponding fixed frame 102. The connecting rod 2011 is rotatably connected to the corresponding fixed frame 102 via the rotating shaft 1023, allowing the connecting rod 2011 to rotate about the rotating shaft 1023. The connecting rod 2011 is extended from the support frame 201 of the turning platform, so that the turning platform is connected to the fixed frame on the base, that is, the turning platform can rotate around the rotating shaft, that is, the turning platform can rotate around the base. In the embodiment of the present application, the rotating shaft can also be a pin.

[0046] The first fixing frame plate 1021 is provided with a through hole along its middle portion extending from its bottom portion. The first fixing frame plate 1021 can be clipped and fixed to the long board through the through hole. The shape of the through hole can match the structure of the long board to ensure that the first fixing frame plate 1021 can be firmly fixed to the long board. In addition, the second fixing frame plate 1022 is provided with a socket along its middle portion extending from its bottom portion. The socket does not penetrate through the socket. The second fixing frame plate 1022 can be fixed to the long board through the socket, that is, the second fixing frame plate 1022 is fixed to the outermost side of the long board. The shape of the socket matches the structure of the long board. Of course, the socket can also be configured as a through hole structure, which can be configured according to specific working conditions.

[0047] When the flip table 20 is rotatably connected to the base 10, that is, the flip table 20 can rotate around the base 10, that is, the flip table 20 can rotate around the rotating shaft 1023 between the top of the first fixed frame plate 1021 and the top of the second fixed frame plate 1022.

[0048] like Figure 3 As shown, the flip table 20 includes a carrier 201 and a support frame 202, and the carrier 201 is located above the support frame 202 and connected to the support frame 202. Specifically, the carrier 201 is located above the support frame 202 and connected to the support frame 202. The carrier 201 is used to carry the workpiece to be flipped, that is, the workpiece to be flipped is fixed on the carrier 201. In the embodiment of the present application, the carrier 201 is formed into a rectangular structure by support rods, and a reinforcement frame is provided in the middle of the rectangular structure. Of course, the number of reinforcement frames and the spacing between adjacent reinforcement frames can be set according to the size of the rectangular structure. Moreover, the long side of the rectangular structure extends toward the base 10 to form a connecting rod 2011, and is connected to the fixed frame 102 at the left and right ends of the base through a rotating shaft 1023.

[0049] Connected below the carrier 201 is a support frame 202, which is used to support the carrier 201 above it and the workpiece to be flipped fixed to the carrier 201. In the embodiment of the present application, the support frame 202 is composed of four vertical support rods and a connecting rod connecting the four vertical support rods. In addition to providing support, the support frame 202 can also provide its own gravity during the upward or downward rotation of the flip table to assist in the ascent or descent of the flip table.

[0050] Of course, in addition to the above-described structures, the carrier 201 and the support frame can also be configured according to specific working conditions. For example, the carrier 201 can be configured as a flat plate structure, or the support frame can be composed of only four vertical support frames. The specific structures of the carrier 201 and the support frame are not limited here, as long as they meet the working requirements. In order to make the entire workpiece turning device structurally beautiful and easy to install, the width of the carrier 201 can be consistent with the length of the base, that is, the width of the turning platform can be equal to the length of the base.

[0051] like Figure 1 As shown, the clamp 30 is fixed on the turning table 20, and the clamp 30 is used to fix the workpiece 50 to be turned on the turning table 20. In the embodiment of the present application, in order to enable the clamp 30 on the turning table 20 to better fix the workpiece 50 to be turned on the turning table 20, the clamp 30 is fixed on the left and right sides of the carrier of the turning table 20, and the space reserved by the clamps 30 on the left and right sides can just be used to install the workpiece 50 to be turned on the carrier. By fixing the left and right sides of the workpiece 50 to be turned, the workpiece 50 to be turned can be fixed on the turning table 20 more firmly to prevent the workpiece 50 to be turned from falling during the turning process. Moreover, the number of the clamps 30 on the left and right sides of the carrier is equal. In the embodiment of the present application, three clamps 30 are respectively provided on the left and right sides of the carrier. There is no specific limitation on the specific position and number of the clamps 30 on the carrier. The clamps 30 can be arranged according to the specific structure of the workpiece 50 to be flipped, so as to firmly fix the workpiece 50 to be flipped on the carrier.

[0052] Next, the specific structure of the clamp 30 will be described. Figure 1 and Figure 4 As shown, the clamp 30 includes a shaft seat 301, a bent plate 302 and a screw 303; the shaft seat 301 is fixed on the turning table 20, and a vertical fixed shaft 3011 is provided on the shaft seat 301, and one end of the fixed shaft 3011 is fixed on the shaft seat 301; the first end of the bent plate 302 is horizontally rotatably mounted on the fixed shaft 3011, and the second end of the bent plate 302 is provided with a nut 3022, and the screw 303 is connected in the nut 3022 to realize the up and down movement of the screw 303, and the screw 303 is used to fix the workpiece 50 to be turned on the turning table 20 by moving up and down.

[0053] Specifically, such as Figure 3-4As shown, the fixture 30 is fixed to the left and right sides of the support frame 201 of the flip table. The fixture 30 includes an axle seat 301, a bent plate 302, and a lead screw 303. The axle seat 301 can be a rectangular parallelepiped, a cube, or a cylindrical structure. Bolt holes are provided around the axle seat 301. Bolts are inserted into the bolt holes to fix the axle seat 301 to the support frame 201. The thickness of the axle seat 301 is not specifically limited and can be set according to specific actual needs. A vertical fixed shaft 3011 is provided in the center of the axle seat 301. That is, one end of the vertical fixed shaft 3011 is fixed to the axle seat 301. One end of the fixed shaft 3011 can be welded to the axle seat 301, or a locking hole can be provided in the center of the axle seat 301. A buckle is provided at one end of the fixed shaft 3011. The buckle and the locking hole cooperate to fix one end of the fixed shaft 301 to the axle seat 301. Moreover, the height of the fixed shaft 301 can be determined according to actual working conditions and is not specifically limited here.

[0054] In which, a sleeve 3021 is provided at the first end of the bent plate 302, and the sleeve 3021 is loosely mounted on the fixed shaft 3011. A through hole 3011-a is provided on the fixed shaft 3011 above the sleeve 3021, and the through hole 3011-a is used to insert a limit pin 3011-b to limit the sleeve 3021 from moving upward along the vertical direction of the fixed shaft.

[0055] Specifically, a sleeve 3021 is provided at the first end of the bent plate. The sleeve 3021 is a hollow cylindrical structure. The sleeve 3021 is loosely inserted on the fixed shaft 3011, with a gap between the sleeve 3021 and the fixed shaft 3011, so that the first end of the bent plate can rotate horizontally about the fixed shaft 3011. After the workpiece 50 to be flipped on the flip table 20 is separated from the flip table 20, the bent plate 302 can be rotated to rotate the first end of the bent plate about the fixed shaft 3011. That is, the bent plate 302 and the lead screw 303 connected to the bent plate 302 can bypass the workpiece 50 to be flipped, thereby facilitating the removal of the workpiece 50 from the flip table 20. At the same time, a through hole 3011-a is provided on the fixed shaft 3011 above the sleeve 3021. The through hole 3011-a is located above the sleeve 3021. When the sleeve 3021 is loosely mounted on the fixed shaft 3011 and the limit pin 3011-b is inserted into the through hole 3011-a above the sleeve 3021, the sleeve 3021 can be restricted from moving upward in the vertical direction of the fixed shaft 3011.

[0056] A nut 3022 is provided at the second end of the bent plate, and the screw 303 is connected to the nut 3022, that is, the nut 3022 is sleeved on the screw 303 to enable the screw 303 to move up and down along the nut 3022. The screw 303 is used to fix the workpiece 50 to be flipped on the flip table 20 by moving up and down.

[0057] A fixing base 3031 is provided at one end of the lead screw 303. The fixing base 3031 is fixed to one end of the lead screw 303. The bottom surface of the fixing base 3031 is used to fix the workpiece 50 to be flipped on the flipping table 20. Specifically, the fixing base 3031 is provided at one end of the lead screw 303, and the horizontal cross-sectional area of the fixing base 3031 is larger than the horizontal cross-sectional area of the lead screw 303. It can be understood that the bottom surface of the fixing base 3031 is used to fix the workpiece 50 to be flipped on the flipping table 20. That is, the fixing base 3031 fixed at one end of the lead screw 303 can increase the contact area between the lead screw 303 and the workpiece 50 to be flipped, thereby better fixing the workpiece 50 to be flipped on the flipping table 20. The fixing base 3031 can be fixed to one end of the lead screw 303 by screws or by welding. Furthermore, there is no specific limitation on the specific structure of the fixing platform 3031 . The fixing platform 3031 may be a cylindrical structure, or a cube or a rectangular parallelepiped structure.

[0058] Furthermore, an operating lever is provided at the other end of the lead screw 303. Rotating the operating lever allows the lead screw 303 to move up and down within the nut 3022. When the lead screw 303 moves downward within the nut 3022, the length of the lead screw 303 below the nut 3022 increases, allowing the fixed platform 3031 to secure the workpiece 50 to be flipped on the flipping platform 20. When the lead screw 303 moves upward within the nut 3022, the length of the lead screw 303 below the nut 3022 decreases, separating the fixed platform 3031 from the workpiece (the flipped workpiece). At this point, the bending plate 302 can be rotated horizontally about the fixed axis 3011, facilitating removal of the workpiece (the flipped workpiece) from the flipping platform 20.

[0059] The device includes two oil cylinders 40 , which are symmetrically arranged on both sides of the turning platform 20 , and both of the oil cylinders 40 are single-acting oil cylinders.

[0060] Specifically, such as Figure 1As shown, the two oil cylinders 40 are symmetrically arranged on both sides of the turning platform 20 and the base 10, that is, one oil cylinder 40 is arranged on the left side of the turning platform 20 and the base 10, and the other oil cylinder 40 is arranged on the right side of the turning platform 20 and the base 10. Both oil cylinders 40 are single-acting oil cylinders, which are driven by hydraulic oil in only one direction and reset in the other direction by spring or gravity. Figure 5 As shown, the oil cylinder 40 includes a piston rod and a cylinder barrel. The piston rod is located within the inner cavity of the cylinder barrel. The piston rod is the telescopic end 401 of the oil cylinder. The telescopic end 401 of the oil cylinder is connected to the turning platform 20. It can be understood that one end of the piston rod can be fixed to the outermost bracket of the turning platform's support frame via a pin, and the other end of the piston rod is located within the inner cavity of the cylinder barrel. One end of the cylinder barrel is the fixed end 402 of the oil cylinder. The fixed end 402 of the oil cylinder is connected to the base 10, that is, one end of the cylinder can be fixed to the bottom surface of the base via a pin.

[0061] like Figure 1 As shown, the height of the supporting frame of the flip table 20 is higher than the bottom surface of the base 10. When the cylinder 40 is installed on the flip table 20 and the base 10, the telescopic end 401 of the cylinder is located on the flip table 10 with a higher height, and the fixed end 402 of the cylinder is located on the bottom surface 101 of the base, that is, the cylinder forms a certain angle with the horizontal direction, and the angle can be determined according to the actual working conditions.

[0062] like Figure 6 As shown, the oil cylinder 40 is used to push the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 to rotate and rise around the base 10. When the turning table 20 rotates to the highest point, the oil cylinder 40 stops supplying oil and controls the return oil flow in the oil cylinder 40 to be less than a preset threshold. The turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 rely on their own gravity to overcome the resistance of the oil cylinder 40 and slowly rotate and descend around the base 10 until the workpiece to be turned 50 falls to the ground to complete the turning.

[0063] When the motor starts and drives the oil cylinder 40 to work, and oil begins to flow into the rodless cavity of the oil cylinder 40, the two oil cylinders 40 push the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 by the clamp 30 to rotate and rise around the base 10, that is, the two oil cylinders 40 push the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 to rotate and rise around the rotating shafts on the left and right fixed frames of the base 10 through the piston rods. When the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 rotate and rise to the highest position, that is, the workpiece 50 to be flipped on the flip table 20 has been flipped 90°, the oil cylinder 40 stops feeding oil and controls the amount of oil returned in the oil cylinder 40 to be less than a preset threshold value, which is determined according to the specific structure of the oil cylinder 40. At this time, Figure 6 As shown, the center of gravity G of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 is biased toward one side of the workpiece to be turned 50, and the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 rotate and descend around the rotating shafts on the fixed frames on the left and right sides of the base 10 by relying on their own gravity. During the descent, it is necessary to overcome the resistance of the oil cylinder 40 so that the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 slowly rotate and descend until the workpiece to be turned 50 falls to the ground, that is, the workpiece to be turned completes a 180° flip.

[0064] It should be noted that the turning platform 20 and the workpiece 50 to be turned, secured thereto, must overcome resistance from the hydraulic cylinder 40 during descent. The primary resistance is the internal resistance of the hydraulic system of the hydraulic cylinder 40, specifically the resistance of the throttle valve within the hydraulic control system. The throttle valve controls the descent speed by adjusting the flow of hydraulic oil, thereby ensuring a smooth and controlled descent. Of course, other resistances also exist, such as mechanical friction, air resistance, or inertia.

[0065] When the workpiece 50 to be flipped falls to the ground and is flipped, the clamp 30 is rotated to separate the flipped workpiece from the flipping table 20, and the oil cylinder 40 pushes the flipping table 20 to rotate and rise around the base 10. When the flipping table 20 rotates to the highest point, the oil cylinder 40 stops supplying oil, and the flipping table 20 relies on the gravity of the carrier and the support frame to overcome the resistance of the oil cylinder 40 and slowly rotates and descends around the base 10 until the flipping table 20 falls to the ground.

[0066] Specifically, when the workpiece to be flipped completes a 180° flip and falls to the ground, the clamp 30 is rotated so that the clamp 30 releases the flipped workpiece, separates the flipped workpiece from the flip table 20, and removes the flipped workpiece from the flip table 20. At this time, there is no workpiece fixed on the flip table 20, and the motor drives the oil cylinder 40 and injects oil into the oil cylinder 40. The oil cylinder 40 pushes the flip table 20 to rotate and rise around the base 10, that is, the two oil cylinders 40 push the flip table to rotate and rise around the rotating shafts on the fixed frames on the left and right sides of the base through the piston rod. When the flip table rotates and rises to the highest position, that is, the flip table has flipped 90°, the oil cylinder 40 stops injecting oil and controls the amount of oil returned in the oil cylinder 40 to be less than a preset threshold value, which is determined according to the specific structure of the oil cylinder 40. At this time, if Figure 7 As shown, the center of gravity G1 of the flip table 20 is biased toward one side of the flip table support frame. The flip table 20 relies on the gravity of the carrier frame and the support frame to rotate and descend around the rotating shafts on the fixed frames on the left and right sides of the base. During the descent, it is necessary to overcome the resistance of the cylinder 40 so that the flip table 20 slowly rotates and descends until the flip table 20 lands, completing a flip cycle.

[0067] The device provided in this application is composed of a base 10, a turning table 20, and a cylinder 40. A workpiece 50 to be turned is fixed to the turning table 20 by a fixture 30 of the turning table. The turning table 20 and the workpiece 50 to be turned fixed thereon are pushed by the cylinder 40 to rotate and rise around the base 10. When they reach the highest point, that is, when the workpiece to be turned is turned 90°, the cylinder 40 stops supplying oil. From the highest point, the turning table 20 and the workpiece 50 to be turned fixed thereon rely on their own gravity to overcome the resistance of the cylinder 40 and slowly rotate and descend around the base 10 until the workpiece to be turned completes a 180° turn. It can be seen that the device has a simple structure, does not require the cylinder to be disassembled, and is easy to operate.

[0068] The present application also provides a workpiece flipping method, which uses any of the above-mentioned devices for workpiece flipping, and the workpiece flipping method includes the following steps:

[0069] The workpiece 50 to be flipped is fixed on the flip table 20 by a fixture 30 fixed on the flip table 20;

[0070] The oil cylinder 40 pushes the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 to rotate and rise around the base 10. When the turning table 20 rotates to the highest point, the oil cylinder 40 stops supplying oil and controls the return oil flow in the oil cylinder 40 to be less than a preset threshold. The turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 rely on their own gravity to overcome the resistance of the oil cylinder 40 and slowly rotate and descend around the base 10 until the workpiece to be turned 50 falls to the ground to complete the turning.

[0071] Specifically, the workpiece flipping method adopts the above-mentioned device for workpiece flipping. The structure of the device for workpiece flipping can refer to the above-mentioned embodiment, and will not be repeated here.

[0072] When the workpiece 50 to be flipped needs to be flipped 180°, the workpiece 50 to be flipped is fixed on the flip table 20 by the clamp 30 fixed on the flip table 20. That is, at this time, it is necessary to ensure that the workpiece 50 to be flipped has been tightly fixed on the flip table 20 by the clamp 30 to avoid accidents such as the workpiece 50 falling during the flipping process.

[0073] After the workpiece 50 to be flipped has been fixed on the flip table 20, the engine is started to drive the cylinder 40 to work. The cylinder 40 pushes the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 to rotate and rise around the base 10. When the flip table 20 rotates to the highest point, that is, the flip table 20 and the workpiece 50 to be flipped fixed on the flip table 20 have been flipped 90°, the cylinder 40 stops supplying oil and controls the return oil amount in the cylinder 40 to be less than a preset threshold value, which is determined according to the specific structure of the cylinder 40. At this time, the gravity of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 is biased towards one side of the workpiece to be turned 50, and the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 rely on their own gravity to rotate and descend around the rotating shafts on the fixed frames on the left and right sides of the base 10. During the descent, it is necessary to overcome the resistance of the oil cylinder 40 so that the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 slowly rotate and descend until the workpiece to be turned 50 falls to the ground, that is, the workpiece to be turned 50 completes a 180° flip.

[0074] When the turning table 20 rotates to the highest point and cannot be lowered, the manual handle of the solenoid valve 609 in the hydraulic system 60 of the oil cylinder 40 is pulled to slowly lower the turning table 20 and the workpiece 50 to be turned fixed on the turning table 20.

[0075] Specifically, when the turning table 20 rotates to the highest point, that is, when the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 are turned 90°, the center of gravity of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 is at the center of the entire device, so that the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 cannot rely on their own gravity to drive the turning table 20 to slowly descend around the base 10. At this time, it is necessary to pull the manual handle of the solenoid valve 609 in the hydraulic system 60 of the oil cylinder to achieve the slow descent of the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20.

[0076] like Figure 8As shown, the hydraulic system 60 includes other components besides the solenoid valve 609. In this embodiment, the hydraulic system 60 also includes a hydraulic oil tank 601, which stores hydraulic oil and provides the entire hydraulic system with fluid. An oil filter 602, installed in the pipeline leading to the throttle valve's oil inlet, filters impurities such as metal particles, dust, and moisture from the fluid. The oil filter 602 can also be located inside or at the bottom of the hydraulic oil tank; the specific location is not limited. A hydraulic pump 603 is the power element of the hydraulic system. It converts the mechanical energy of the prime mover into liquid pressure energy and provides power to the entire hydraulic system. Hydraulic pumps 603 come in various types, such as gear pumps, vane pumps, and plunger pumps, and can be selected based on specific operating conditions. A relief valve 604, also known as a safety valve or pressure relief valve, is installed. For example, if the hydraulic pump 603 suddenly stops operating or the load suddenly increases, the system pressure may rise sharply. In this case, the relief valve 604 will quickly open to release excess pressure and protect other components in the system from damage. Solenoid reversing valve 605, also known as a solenoid control valve or solenoid directional control valve, is primarily used to control the flow of hydraulic oil, thereby changing the direction of cylinder movement. Hydraulically controlled check valve 606, also known as a hydraulically controlled one-way valve or hydraulically controlled check valve, primarily controls the unidirectional flow of hydraulic oil and allows reverse flow under certain conditions. Hydraulically controlled check valve 606 typically consists of a main valve core and a control piston. The main valve core controls the unidirectional flow of oil, while the control piston controls the movement of the main valve core based on the pressure at the control port. When there is no pressure at the control port, the main valve core remains closed by a spring, allowing oil to flow only from the inlet to the outlet and preventing reverse flow. When the control port receives a certain level of hydraulic oil pressure, the control piston pushes the main valve core, causing it to open, allowing oil to flow from the outlet to the inlet, achieving reverse flow. One-way throttle valve 607, also known as a one-way flow control valve, primarily controls the flow direction and volume of oil. It combines the functions of a one-way valve and a throttle valve, providing different flow characteristics in different directions. The electronically controlled balancing valve 608, also known as an electronically controlled balancing valve or an electronically controlled proportional balancing valve, is primarily used to control and adjust the speed and smoothness of the cylinder's movement. The speed regulating valve 610, also known as a flow control valve or throttle valve, is primarily used to adjust and control the flow of oil, thereby controlling the speed of the cylinder. The various components in the hydraulic system are connected by connecting pipes to form a complete hydraulic system. Of course, in addition to the aforementioned components, the hydraulic system also has other components, which will not be described here.

[0077] The following is a brief description of the working process of the hydraulic system:

[0078] The electric motor drives the hydraulic pump 603, which in turn forces the hydraulic oil in the hydraulic oil tank 601 through the oil filter 602, the solenoid reversing valve 605, the hydraulically controlled check valve 606, the one-way throttle valve 607, and the electronically controlled counterbalance valve 608, driving the oil cylinders 40. The left and right oil cylinders 40 propel the turning platform 20 and the workpiece 50 affixed to it, which is to be turned, upward. The solenoid reversing valve 605 switches position, and the electronically controlled counterbalance valve 608 and solenoid valve 609 are activated, allowing the turning platform 20 and the workpiece 50 affixed to it to descend under their own gravity, completing a 180-degree turn. During the flipping process, overflow valve 604 acts as a safety valve to prevent system overload, providing a safety feature. When one-way throttle valve 607 is raised, hydraulic oil enters the lower chamber of cylinder 40 through it. During the descent, hydraulic oil returns to the lower chamber of cylinder 40, limiting the descent speed due to the throttling resistance of one-way throttle valve 607. Speed regulating valve 610 controls the descent speed. When electromagnetic reversing valve 605 is de-energized, hydraulic control one-way valve 606 maintains pressure in cylinder 40, preventing the load from moving. To ensure a smooth descent of the entire device, an electrically controlled balancing valve 608 is installed in the oil return line. This balancing circuit maintains pressure, ensuring that the descent speed is unaffected by the workpiece being flipped. The descent speed is controlled by regulating the flow rate through one-way throttle valve 607. When the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 are at a high position and cannot be lowered, the manual handle of the solenoid valve 609 can be pulled to control the direction of the hydraulic oil, and then control the extension and retraction of the oil cylinder, so that the turning table 20 and the workpiece to be turned 50 fixed on the turning table 20 can land smoothly and complete the turning.

[0079] It should be noted that although several structures, components, or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, depending on the specific implementation of the application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided into multiple components, structures, or units for embodiment.

[0080] Furthermore, although the components of the assembly or device of the present application and the arrangement of the components are depicted in a particular order in the drawings, this does not require or imply that the assembly or device must be designed in accordance with the particular components or arrangement of the components, or that all of the components shown must be included to achieve the desired results. Additionally or alternatively, certain components may be omitted, multiple components may be combined into one component to achieve corresponding functions, and / or one component may be decomposed into multiple components to achieve corresponding functions, etc.

[0081] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A device for turning a workpiece, characterized in that: The device comprises: a base, a turning platform and an oil cylinder; The base is used to be installed on the ground, the turning platform is rotatably connected to the base, a clamp is provided on the turning platform, the clamp is fixed on the turning platform, and the clamp is used to fix the workpiece to be turned on the turning platform, the telescopic end of the oil cylinder is connected to the turning platform, and the fixed end of the oil cylinder is connected to the base; The oil cylinder is used to push the turning platform and the workpiece to be turned fixed on the turning platform to rotate and rise around the base. When the turning platform rotates to the highest point, the oil cylinder stops supplying oil and controls the return oil flow in the oil cylinder to be less than a preset threshold. The turning platform and the workpiece to be turned fixed on the turning platform rely on their own gravity to overcome the resistance of the oil cylinder and slowly rotate and descend around the base until the workpiece to be turned falls to the ground to complete the turning.

2. The device according to claim 1, characterized in that The fixture includes a shaft seat, a bent plate and a lead screw; The shaft seat is fixed on the turning platform, and a vertical fixed shaft is provided on the shaft seat, and one end of the fixed shaft is fixed on the shaft seat; The first end of the bent plate is horizontally rotatably mounted on the fixed shaft, the second end of the bent plate is provided with a nut, the lead screw is connected in the nut to enable the lead screw to move up and down, and the lead screw is used to fix the workpiece to be flipped on the flip table by moving up and down.

3. The device according to claim 2, characterized in that A sleeve is provided at the first end of the bent plate, and the sleeve is loosely mounted on the fixed shaft. A through hole is provided on the fixed shaft above the sleeve, and the through hole is used to insert a limit pin to limit the sleeve from moving upward along the vertical direction of the fixed shaft.

4. The device according to claim 2, characterized in that A fixing platform is provided at one end of the lead screw, and the fixing platform is fixed to one end of the lead screw. The bottom surface of the fixing platform is used to fix the workpiece to be turned over on the turning platform.

5. The device according to claim 1, characterized in that The base is a long strip structure, and screw holes are provided on both sides of the bottom surface of the long side of the long strip structure, and the screw holes are used to insert screws to rigidly connect the base to the ground through the screws; The left and right ends of the base are respectively provided with fixing frames, and the left and right ends of the turning platform are respectively provided with connecting rods, and the connecting rods are rotatably connected to the fixing frames through rotating shafts.

6. The device according to claim 5, characterized in that The fixing frame includes a first fixing frame plate and a second fixing frame plate. There is a gap between the first fixing frame plate and the second fixing frame plate, and the rotating shaft is arranged in the gap.

7. The device according to claim 1, characterized in that It comprises two oil cylinders, which are symmetrically arranged on both sides of the turning platform, and both of the oil cylinders are single-acting oil cylinders.

8. The device according to claim 1, characterized in that The turning platform includes a carrier frame and a support frame, wherein the carrier frame is located on the support frame and connected to the support frame; When the workpiece to be flipped falls to the ground and is flipped, the clamp is rotated to separate the flipped workpiece from the flip table, and the oil cylinder pushes the flip table to rotate and rise around the base. When the flip table rotates to the highest point, the oil cylinder stops supplying oil, and the flip table relies on the gravity of the carrier and the support frame to overcome the resistance of the oil cylinder and slowly rotates and descends around the base until the flip table falls to the ground.

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