A water-floating flexible multi-point curved surface support structure

Abstract

The present invention discloses a water-floating flexible multi-point curved surface support structure, which belongs to the field of high-end precision manufacturing technology. The structure includes a box body and a plurality of buoyancy units. Liquid is arranged in the box body, and the density of the liquid is greater than the density of the buoyancy unit. An isolation plate is arranged on the top of the box body, and a plurality of guide holes are arranged on the isolation plate. The buoyancy units all float on the surface of the liquid, and their tops are exposed through their respective corresponding guide holes. A clamping structure for clamping the exposed ends of the buoyancy units is also arranged on the top of the isolation plate. The present invention effectively reduces the deformation of the workpiece due to gravity and clamping deformation, which is beneficial to improving the manufacturing and measurement accuracy of the workpiece. It also has the characteristics of high reliability, strong operability, low cost, and easy installation and maintenance.

Description

Technical Field

[0001] The invention relates to the field of high-end precision manufacturing technology, and in particular to a water-floating flexible multi-point curved surface support structure. Background Art

[0002] With the continuous advancement of science and technology in modern society, the demand for the construction of large-scale precision equipment is increasing, and these large-scale equipment often encounter large-area complex curved surface parts. Especially in high-end fields such as aerospace, satellite communications, and optical equipment, these large-area complex curved surface parts often require very high dimensional accuracy, which causes considerable difficulties in processing and measurement.

[0003] As the area of ​​complex curved parts increases, the deformation caused by their own gravity will also increase, which will affect the accuracy of part processing and measurement. For example, some curved parts with micron precision requirements can even reach the millimeter level in different tooling conditions such as vertical, flat, supported on both sides, and fitted on all sides, which is far beyond the design requirements. In addition, large-area curved parts are prone to deformation due to clamping force due to poor stiffness in the normal direction of the surface and within the surface. This deformation magnitude can easily exceed the designed surface accuracy range. In summary, the deformation of large-area curved parts caused by gravity and clamping force greatly affects the accuracy of part surface processing and measurement.

[0004] The traditional solution to this problem is to make a profiling mold, that is, to make a high-rigidity support surface or a tooling that simulates the actual working conditions of the part, so that it fits the surface on one side of the part as closely as possible while completing the processing or measurement of the surface on the other side. This solution has disadvantages. For example, if a group of similar parts are processed according to the traditional solution, a group of different tooling molds need to be processed, and these tooling molds are not universal. This will take a lot of time and cost. Summary of the invention

[0005] In view of this, the present invention provides a water-floating flexible multi-point curved surface support structure. This structure effectively reduces the deformation of the workpiece due to gravity and clamping, which is conducive to improving the manufacturing and measurement accuracy of the workpiece; and has the characteristics of high reliability, strong operability, low cost, and easy installation and maintenance.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A water-floating flexible multi-point curved surface support structure comprises a box body and a plurality of buoyancy units, wherein the box body is provided with liquid, and the density of the liquid is greater than the density of the buoyancy units; an isolation plate is provided on the top of the box body, and a plurality of guide holes are provided on the isolation plate; the buoyancy units all float on the liquid surface, and their tops are exposed through their respective corresponding guide holes; a clamping structure for clamping the exposed ends of the buoyancy units is also provided on the top of the isolation plate.

[0008] Furthermore, the side wall of the box body is provided with an overflow hole.

[0009] Furthermore, the buoyancy unit includes a center rod and a float; the density of the float is less than the density of the liquid, and the float is located at the bottom of the center rod; the top of the center rod is provided with a contact head for directly receiving the workpiece, and the contact head is exposed from the guide hole of the isolation plate.

[0010] Furthermore, a limit plate is provided on the center rod, and the limit plate is located directly below the guide hole of the isolation plate.

[0011] Furthermore, the clamping structure includes a clamping plate, a support and a connecting rod; the support is located on one side of the clamping plate; a cam is also provided on the support, and the two are connected by a bearing structure; the two ends of the connecting rod are respectively connected to the clamping plate and the cam; a ring is provided at one end of the connecting rod connected to the cam, and a groove corresponding to the cam is provided on the inner wall of the ring, and the two are movably connected; a handle for driving the cam to rotate is also provided on the cam, and the handle and the connecting rod are connected by a push spring and have a tendency to separate; a notch for clamping the buoyancy unit is provided on the other side of the clamping plate;

[0012] When the buoyancy unit is in a clamped state, the raised portion of the cam is located in its corresponding groove; when the buoyancy unit is in a loosened state, the raised portion of the cam and its corresponding groove have an angle greater than 0°.

[0013] Furthermore, two connecting rods and two supporting seats are provided, and they correspond to each other one by one; and the two connecting rods are respectively connected to the two ends of the clamping plate.

[0014] The beneficial effects of the above technical solution of the present invention are:

[0015] 1. The present invention utilizes liquid buoyancy to provide multi-point controllable flexible support for curved workpieces, which is particularly suitable for the manufacturing process of workpieces with large-area, high-precision, and complex curved structures, effectively reducing the gravity deformation and clamping deformation of the workpiece, and is beneficial to improving the manufacturing and measurement accuracy of the workpiece.

[0016] 2. The present invention can adjust the number of supporting forces, the size of a single supporting force and the distribution of supporting points according to the structural characteristics of the workpiece itself, and is flexible, controllable and highly adaptable.

[0017] 3. The structure of the present invention is simple and reliable, and is easy to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 sectional view of .

[0020] Figure 3 It is an internal structure diagram of an embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the structure of the water tank in the embodiment of the present invention.

[0022] Figure 5 Schematic diagram of the structure of the buoyancy unit of the embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the working state structure of an embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of the clamping structure of an embodiment of the present invention.

[0025] In the figure: 1. water tank, 2. buoyancy unit, 3. clamping device, 4. liquid, 5. measuring head, 6. workpiece, 1.1. box body, 1.2. overflow hole, 1.3. isolation plate, 1.4. guide hole, 2.1. contact head, 2.2. center rod, 2.3. limit plate, 2.4. float, 3.1 clamping plate, 3.2. support, 3.3. cam, 3.4. handle, 3.5. connecting rod, 3.6. push spring. DETAILED DESCRIPTION

[0026] The following specific embodiments are used to further illustrate the content of the present invention. Of course, the following specific embodiments are only used to illustrate the content of different aspects of the present invention, and should not be understood as limiting the scope of the present invention.

[0027] A water-floating flexible multi-point curved surface support structure comprises a box body and a plurality of buoyancy units, wherein the box body is provided with liquid, and the density of the liquid is greater than the density of the buoyancy units; an isolation plate is provided on the top of the box body, and a plurality of guide holes are provided on the isolation plate; the buoyancy units all float on the liquid surface, and their tops are exposed through their respective corresponding guide holes; a clamping structure for clamping the exposed ends of the buoyancy units is also provided on the top of the isolation plate.

[0028] Furthermore, the side wall of the box body is provided with an overflow hole.

[0029] Furthermore, the buoyancy unit includes a center rod and a float; the density of the float is less than the density of the liquid, and the float is located at the bottom of the center rod; the top of the center rod is provided with a contact head for directly receiving the workpiece, and the contact head is exposed from the guide hole of the isolation plate.

[0030] Furthermore, a limit plate is provided on the center rod, and the limit plate is located directly below the guide hole of the isolation plate.

[0031] Furthermore, the clamping structure includes a clamping plate, a support and a connecting rod; the support is located on one side of the clamping plate; a cam is also provided on the support, and the two are connected by a bearing structure; the two ends of the connecting rod are respectively connected to the clamping plate and the cam; a ring is provided at one end of the connecting rod connected to the cam, a groove corresponding to the cam is provided on the inner wall of the ring, and the two are movably connected; a handle for driving the cam to rotate is also provided on the cam, the handle and the connecting rod are connected by a push spring and the two have a tendency to separate; a notch is provided on the other side of the clamping plate for clamping the buoyancy unit;

[0032] When the buoyancy unit is in a clamped state, the raised portion of the cam is located in its corresponding groove; when the buoyancy unit is in a loosened state, the raised portion of the cam and its corresponding groove have an angle greater than 0°.

[0033] Furthermore, two connecting rods and two supporting seats are provided, and they correspond to each other one by one; and the two connecting rods are respectively connected to the two ends of the clamping plate.

[0034] The following is a specific embodiment:

[0035] Reference Figures 1 to 7 This embodiment includes a water tank 1, a buoyancy unit 2, and a clamping structure 3.

[0036] Among them, the box body 1 is mainly composed of a box body 1.1 and an isolation plate 1.3. The isolation plate is horizontally arranged on the upper layer of the box body, and is provided with evenly arranged guide holes 1.4 with a diameter of 10.5mm. The isolation plate is made of steel plate with a thickness of 30mm. Both sides are welded to the box body 1.1 and have sufficient rigidity and strength. Eight overflow holes 1.2 are horizontally arranged on the upper ends of the two side walls of the box body. The overflow holes have a diameter of 10mm and the height of the overflow holes is flush with the lower surface of the isolation plate. The liquid in the box body is water. The liquid in the box body is maintained at the level of the lower surface of the isolation plate. Excessive liquid in the box body will be discharged to the outside of the box body through the overflow hole, so that the upper surface of the isolation plate is always kept dry. In this embodiment, no automatic liquid replenishing device is provided. If the liquid level is low, it is replenished manually.

[0037] The buoyancy unit 2 includes a contact head 2.1, a center rod 2.2, a limit plate 2.3 and a float 2.4. The contact head 2.1 is an aluminum alloy spherical structure with a diameter of 8 mm. The center rod 2.2 is made of an aluminum alloy tube with an outer diameter of 5 mm, has sufficient rigidity and strength, and a smooth outer surface. The contact head 2.1 and the center rod 2.2 are welded into one. The limit plate is made of an aluminum alloy plate with a thickness of 1.5 mm and a diameter of 15 mm, and is fixed to a certain position in the middle of the center rod by a pin, which allows the contact head of the buoyancy unit to be up to 300 mm higher than the isolation plate. The float is made of low-density plastic injection molding, cubic shape, side length 49 mm, with a hole in the middle, the hole diameter 5.5 mm, and can be smoothly inserted into the center rod. The float unit has a hollow structure and a density much lower than the density of water. Each buoyancy unit contains 5 floats. In other cases, the number can be changed according to demand.

[0038] The clamping structure 3 consists of a clamping plate, a support, a connecting rod, a cam and a spring; the clamping plate is arranged on the upper surface of the isolation plate 1.3 and is in the shape of a long strip. Each clamping plate has a uniformly distributed notch structure, and the notch corresponds to the buoyancy unit of the adjacent row. By applying a thrust to the clamping plate, the clamping plate and the guide hole squeeze the central rod of the buoyancy unit to lock it.

[0039] The support is fixed on the top of the isolation plate, and a cam is also provided on the support, and the two are connected by a bearing structure; the two ends of the connecting rod are respectively connected to the clamping plate and the cam; a ring is provided at one end of the connecting rod connected to the cam, and the inner wall of the ring has a groove corresponding to the cam, and the ring is sleeved on the cam; the cam is also provided with a handle for driving it to rotate, and the handle and the connecting rod are connected by a push spring and the two have a tendency to separate; a notch is provided on the other side of the clamping plate for clamping the buoyancy unit.

[0040] When the buoyancy unit is in a clamped state, the raised portion of the cam is located in its corresponding groove; when the buoyancy unit is in a loosened state, the raised portion of the cam and its corresponding groove have an included angle.

[0041] In this embodiment, when no workpiece is placed, the water is filled, and all buoyancy units are located at the upper limit position, that is, the contact heads are located 300mm above the upper surface of the isolation plate. According to calculations, it can fully support workpieces with a weight of less than 50 kg and a free height difference of less than 300mm.

[0042] When a workpiece is slowly placed on the contact head, the workpiece contacts the contact head and presses the buoyancy unit downward under the action of gravity. Each buoyancy unit contributes a certain amount of buoyancy, and finally the sum of the buoyancy of several buoyancy units is balanced with the gravity of the workpiece. The workpiece is stably and evenly lifted up by many points and reaches a balanced static state. At this time, the locking device comes into play and moves horizontally along the isolation plate under the action of external force, pressing the center rod firmly against the side wall of the guide hole, thereby fixing the entire system.

[0043] In general, the technical solution provided by the patent of the present invention realizes multi-point controllable flexible support, which is particularly suitable for the processing and manufacturing process of workpieces with large-area complex curved surface structures. It can provide stable, controllable and uniform support force for large-area complex curved surface areas, effectively reducing the gravity deformation and clamping deformation of the workpiece, which is conducive to improving the manufacturing and measurement accuracy of the workpiece. Compared with traditional profiling molds and other existing support solutions, this solution has the advantages of flexible, adjustable and controllable number of support forces, size of single support forces and distribution of support points. In addition, the technical solution of the present invention is also easy to install and maintain, low cost and strong feasibility.

[0044] It should be understood that the above description of the specific implementation methods of this patent is only an exemplary description listed to facilitate ordinary technicians in the field to understand the patent scheme, and does not imply that the scope of protection of this patent is limited to these individual examples. Ordinary technicians in this field can fully understand the technical scheme of this patent and, without any creative work, obtain more specific implementation methods by combining technical features, replacing some technical features, adding more technical features, etc. to the examples listed in this patent. All these specific implementation methods are within the scope of the claims of this patent. Therefore, these new specific implementation methods should also be within the scope of protection of this patent.

[0045] In addition, for the purpose of simplifying the description, this patent may not list some common specific implementation schemes, which are naturally conceivable to ordinary technicians in this field after understanding the technical scheme of this patent. Obviously, these schemes should also be included in the scope of protection of this patent.

Claims

1. A water-floating flexible multi-point curved surface support structure, characterized in that: The invention comprises a box body (1.1) and a plurality of buoyancy units (2), wherein a liquid is provided in the box body, and the density of the liquid is greater than the density of the buoyancy units; an isolation plate (1.3) is provided on the top of the box body, and a plurality of guide holes (1.4) are provided on the isolation plate; the buoyancy units (2) all float on the surface of the liquid, and the tops thereof pass through the corresponding guide holes and are exposed; a clamping structure for clamping the exposed parts of the buoyancy units is also provided on the top of the isolation plate; an overflow hole (1.2) is provided on the side wall of the box body; the buoyancy unit comprises a central rod (2.2) and a float (2.4); the density of the float is less than the density of the liquid, and the float is located at the bottom of the central rod; a contact head (2.1) for directly receiving a workpiece is provided on the top of the central rod. , the contact head is exposed in the guide hole (1.4) of the isolation plate; a limit plate is also provided on the center rod, and the limit plate is located directly below the guide hole of the isolation plate; the clamping structure comprises a clamping plate (3.1), a support (3.2) and a connecting rod (3.5); the support is located on one side of the clamping plate; a cam is also provided on the support, and the two are connected by a bearing structure; the two ends of the connecting rod are respectively connected to the clamping plate and the cam; a ring is provided at one end of the connecting rod connected to the cam, and a groove corresponding to the cam is provided on the inner wall of the ring, and the two are movably connected; a handle for driving the cam to rotate is also provided on the cam, and the handle and the connecting rod are connected by a push spring and the two have a tendency to separate; a notch is provided on the other side of the clamping plate for clamping the buoyancy unit; When the buoyancy unit is in a clamped state, the raised portion of the cam is located in its corresponding groove; when the buoyancy unit is in a loosened state, the raised portion of the cam and its corresponding groove have an angle greater than 0°.

2. A water-floating flexible multi-point curved surface support structure according to claim 1, characterized in that: The connecting rods and the supporting seats are each provided with two and correspond to each other one by one; the two connecting rods are respectively connected to the two ends of the clamping plate.

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