A thin-walled cylinder quenching deformation suppression tool, device, method and application

Abstract

The present invention provides a tool, device, method and application for suppressing the quenching deformation of a thin-walled cylinder; the tool comprises a first split unit and a second split unit; the first split unit comprises a first tripod and a first triangular block; the three vertices of the first tripod and the first triangular block are detachably fixedly connected in the axial direction by a first inner rod and two first outer rods; the second split unit comprises a second tripod and a second triangular block; the three vertices of the second tripod and the second triangular block are detachably fixedly connected in the axial direction by two second inner rods and a second outer rod. The present invention can control the deformation of a thin-walled cylinder without affecting the free thermal expansion of the thin-walled cylinder, and realize the coordinated regulation of the solid solution quenching shape of a thin-walled cylinder with a high diameter-to-thickness ratio.

Description

Technical Field

[0001] The invention relates to the field of metal profile processing, and in particular to a thin-walled cylinder quenching deformation suppression tool, device, method and application. Background Art

[0002] For aerospace applications, the diameter-to-thickness ratio (ratio of diameter to thickness) of thin-walled cylinders is usually large, generally ≥50, and the thickness of the cylinder is generally not more than 20 mm; therefore, during the production stage, it is easy to cause deformation of thin-walled cylinders. For example, taking an aluminum alloy cylinder as an example, after the aluminum alloy cylinder is integrally spun, it needs to be subjected to solution quenching treatment, which will cause the cylinder to deform and thus fail to meet the shape accuracy requirements; therefore, suppressing the quenching deformation of thin-walled cylinders is crucial to the quality of its products.

[0003] A Chinese invention patent application with publication number CN104475495A discloses a method for correcting the shape of a cylinder with a diameter greater than 1 meter; the method controls the gap between the inner surface of the cylinder and the correcting core mold, and utilizes the fact that the material expansion coefficient of the bulging core mold is greater than the expansion coefficient of the cylinder material. During the cooling process after heating, the thickness and volume of the bulging core mold are much larger than those of the cylinder, so the cooling rate of the cylinder is greater than that of the bulging core mold. During the cooling process, the cylinder shrinks and deforms, and the deformation of the cylinder is restricted by the bulging core mold, thereby achieving the effect of controlling deformation and correcting. Although the above patent application is capable of thermally calibrating the cylinder, it only uses conventional tooling for thermal calibration; since the temperature will change dramatically during the quenching process and free thermal expansion due to rapid cooling will occur during quenching, and conventional tooling is an integral mold with a large dead weight and is mostly made of steel, which is inconsistent with the thermal expansion coefficient of the aluminum alloy cylinder. If only conventional tooling is used to heat and quench the thin-walled cylinder, it is difficult to suppress the quenching deformation of the thin-walled cylinder, and it is easy to affect the free thermal expansion of the thin-walled cylinder and easily cause damage to the thin-walled cylinder.

[0004] In view of this, it is necessary to provide a thin-walled cylinder quenching deformation suppression tool, device, method and application to solve or at least alleviate the technical problem of thin-walled cylinder quenching deformation. Summary of the invention

[0005] The main purpose of the present invention is to provide a thin-walled cylinder quenching deformation suppression tool, device, method and application, aiming to solve the above-mentioned technical problem of thin-walled cylinder quenching deformation.

[0006] To achieve the above-mentioned object, the present invention provides a thin-walled cylinder quenching deformation suppression tool, the thin-walled cylinder quenching deformation suppression tool comprises a first split unit and a second split unit;

[0007] The first split unit includes a first tripod, a first triangular block, and a first rod; the first rod includes a first inner rod and a first outer rod; the first inner rod is in axial contact with the inner wall of the thin-walled cylinder, and the first outer rod is in axial contact with the outer wall of the thin-walled cylinder; the three vertices of the first tripod and the first triangular block are detachably fixedly connected in the axial direction through one first inner rod and two first outer rods, and the first inner rod is located between the two first outer rods in the circumferential direction;

[0008] The second split unit includes a second tripod, a second triangular block, and a second rod; the second rod includes a second inner rod and a second outer rod; the second inner rod is in axial contact with the inner wall of the thin-walled cylinder, and the second outer rod is in axial contact with the outer wall of the thin-walled cylinder; the three vertices of the second tripod and the second triangular block are detachably fixedly connected in the axial direction by two second inner rods and one second outer rod, and the second outer rod is circumferentially located between the two second inner rods.

[0009] Furthermore, the bottoms of the first tripod and the second tripod are both fixedly provided with feet in the radial direction.

[0010] Further, first lower convex rods are axially arranged at the three vertices of the first tripod, and the first lower convex rods face the first triangular block; first upper convex rods are axially arranged at the three vertices of the first triangular block, and the first upper convex rods face the first tripod; the first lower convex rod and the first upper convex rod are detachably fixedly connected by the first rod member;

[0011] A second lower protrusion is axially provided at the three vertices of the second tripod, and the second lower protrusion faces the second triangular block; a second upper protrusion is axially provided at the three vertices of the second triangular block, and the second upper protrusion faces the second tripod; the second lower protrusion and the second upper protrusion are detachably fixedly connected via the second rod member.

[0012] Furthermore, the first lower convex rod, the first upper convex rod, the second lower convex rod, and the second upper convex rod are all provided with an axle pin hole, and the first rod member and the second rod member are correspondingly provided with an axle pin hole; the first lower convex rod and the first upper convex rod are both detachably fixedly connected to the first rod member via an axle pin and an axle pin hole; the second lower convex rod and the second upper convex rod are both detachably fixedly connected to the second rod member via an axle pin and an axle pin hole.

[0013] Furthermore, the first split unit and the second split unit are both plural; the first split unit and the second split unit are alternately arranged along the circumferential direction.

[0014] Further, the first rod and the second rod are arranged adjacent to each other in the order of the first outer rod, the first inner rod, the first outer rod, the second inner rod, the second outer rod, the second inner rod and the first outer rod in the circumferential direction; and the adjacent distances of the first outer rod, the first inner rod, the first outer rod, the second inner rod, the second outer rod, the second inner rod and the first outer rod in the circumferential direction are consistent.

[0015] The present invention also provides a device for suppressing the quenching deformation of a thin-walled cylinder, which comprises any of the above-described thin-walled cylinder quenching deformation suppression tooling; the device for suppressing the quenching deformation of a thin-walled cylinder also comprises a material frame; the bottom of the material frame is provided with a guide block which slides radially with the first tripod and the second tripod.

[0016] The present invention also provides a use of any of the above-mentioned thin-walled cylinder quenching deformation suppression tools in suppressing the quenching deformation of the thin-walled cylinder.

[0017] The present invention also provides a method for suppressing quenching deformation of a thin-walled cylinder, using any of the above-mentioned thin-walled cylinder quenching deformation suppression tools to suppress quenching deformation of the thin-walled cylinder; the first split unit and the second split unit are both multiple; the first split unit and the second split unit are alternately arranged along the circumferential direction;

[0018] The method for suppressing quenching deformation of a thin-walled cylinder comprises the following steps:

[0019] S1, determining the number of the first split unit and the second split unit; the number of the first split unit and the second split unit satisfies that the total number of internal rods is not less than the theoretical value of internal rods; the total number of internal rods is the sum of the number of the first internal rods and the second internal rods;

[0020] The inner rod theoretical value is obtained by analyzing the theoretical number of sides, and the inner rod theoretical value is equal to half of the theoretical number of sides;

[0021] The theoretical number of edges is obtained by analyzing one of Formula 1, Formula 2, and Formula 3;

[0022] The formula 1 is:

[0023] The formula 2 is:

[0024] The formula three is:

[0025] In Formulas 1 to 3, d1 is the preset convex deformation amount, in mm; d2 is the preset concave deformation amount, in mm; d is the preset average deformation amount, in mm; n is the theoretical number of sides, in pieces; D is the outer diameter of the thin-walled cylinder, in mm;

[0026] S2, after determining the number of the first split unit and the second split unit; installing the thin-walled cylinder quenching deformation suppression tooling and the thin-walled cylinder together, and using the thin-walled cylinder quenching deformation suppression tooling to suppress quenching deformation of the thin-walled cylinder.

[0027] Furthermore, the theoretical number of edges is obtained by analyzing according to Formula 3.

[0028] The present invention also provides a method for suppressing quenching deformation of a thin-walled cylinder, comprising: during the quenching process, performing stiffness compensation on the thin-walled cylinder;

[0029] The stiffness compensation comprises: selecting a plurality of local positions on the thin-walled cylinder and installing rods at the local positions;

[0030] The rod is in axial contact with the thin-walled cylinder and is detachably fixedly connected to the thin-walled cylinder; during the quenching process, the rod moves in the radial direction along with the thin-walled cylinder;

[0031] The rod member comprises an inner rod and an outer rod, wherein the inner rod contacts the inner wall of the thin-walled cylinder, and the outer rod contacts the outer wall of the thin-walled cylinder;

[0032] The inner rod and the outer rod are alternately arranged at each local position; or, the inner rod and the outer rod are arranged at each local position.

[0033] Compared with the prior art, the present invention has at least the following advantages:

[0034] The present invention can control the deformation of the thin-walled cylinder without affecting the free thermal expansion of the thin-walled cylinder, and realize the coordinated regulation of the solid solution quenching shape of the thin-walled cylinder with a high diameter-to-thickness ratio. The present invention abandons the overall tooling structure and adopts a split layout, which greatly reduces the dead weight and can adapt to the free thermal expansion of the thin-walled cylinder during the heating process and the rapid cooling during quenching; that is, on the basis of the staggered arrangement of inner and outer rods, the present invention connects three adjacent rods into a unit, and fixes the rods by a tripod and a triangle plate, rather than connecting them by a whole ring, which greatly reduces the dead weight and can effectively restrain the deformation without limiting the free thermal expansion of the cylinder.

[0035] Since the quenching deformation of a thin-walled cylinder is a wrinkling form accompanied by concave and convex, the present invention proposes a polygonal hypothesis and provides a method for suppressing the quenching deformation of a thin-walled cylinder based on the tooling in the present invention; the present invention determines the number of the first split unit and the second split unit based on the analysis of the theoretical number of edges, and can control the deformation of the thin-walled cylinder through the thin-walled cylinder quenching deformation suppression tooling to meet the preset deformation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 It is a schematic structural diagram of a thin-walled cylinder quenching deformation suppression tool and a thin-walled cylinder after installation in one embodiment of the present invention;

[0038] Figure 2 for Figure 1 A partial enlarged view of

[0039] Figure 3 It is a schematic diagram of the structure of a thin-walled cylinder quenching deformation suppression tooling in one embodiment of the present invention;

[0040] Figure 4 for Figure 3 A partial enlarged view of

[0041] Figure 5 It is a schematic structural diagram of a thin-walled cylinder quenching deformation suppression device in one embodiment of the present invention;

[0042] Figure 6 for Figure 5 A partial enlarged view of

[0043] Figure 7 This is a relationship diagram between the deformation amount and the number of sides of a thin-walled cylinder with an outer diameter (diameter) of 3350 mm in one embodiment of the present invention;

[0044] Figure 8 This is a deviation cloud diagram after the thin-walled cylinder with an outer diameter of 873mm is solution-quenched and then scanned by a 3D scanner and compared with the standard 873mm cylindrical surface. The numbers in the figure refer to the actual deformation amount at that point.

[0045] Figure numerals: 1, thin-walled cylinder; 2, first split unit; 3, second split unit; 4, first tripod; 5, first triangular block; 6, first inner rod; 7, first outer rod; 8, second tripod; 9, second triangular block; 10, second inner rod; 11, second outer rod; 12, slider; 13, material frame; 14, guide block.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] When the embodiments give a numerical range, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are in accordance with the prior art mastery of the technicians in this field and the description of the present invention. Any method, equipment and material of the prior art similar to or equivalent to the method, equipment and material in the embodiments of the present invention can also be used to implement the present invention; in the present invention, the axial, radial and circumferential directions are all based on the thin-walled cylinder 1.

[0050] See also Figure 1-Figure 4 As shown, the present invention provides a quenching deformation suppression tool for a thin-walled cylinder 1, and the quenching deformation suppression tool for the thin-walled cylinder 1 includes a first split unit 2 and a second split unit 3; the first split unit 2 and the second split unit 3 are both used to suppress the quenching deformation of the thin-walled cylinder 1. In the present invention, the diameter-to-thickness ratio (ratio of diameter to thickness) of the thin-walled cylinder 1 is relatively large, and the diameter-to-thickness ratio is generally ≥50, and the thickness of the thin-walled cylinder 1 is generally not more than 20 mm.

[0051] In practical applications, the first split unit 2 and the second split unit 3 are usually multiple; the number of the first split unit 2 and the second split unit 3 is consistent, and the first split unit 2 and the second split unit 3 are alternately arranged; the circumferential spacing between the first split unit 2 and the second split unit 3 is usually consistent.

[0052] The first split unit 2 includes a first tripod 4, a first triangular block 5, and a first rod; the first rod includes a first inner rod 6 and a first outer rod 7. The first tripod 4 and the first triangular block 5 are both formed into a triangular shape by a connecting block, that is, the three vertices are connected by a connecting block; the bottom of the first tripod 4 can be fixedly provided with a foot in the radial direction, and the bottom of the second tripod 8 can be specifically provided with two said foots, and the said foots have a supporting function; further, the said foots include a sliding assembly, and the said sliding assembly includes a slider 12, and the slider 12 is extended in the radial direction. The number of the sliders 12 of each first tripod 4 can be two, and the two sliders 12 are arranged in parallel. By providing the slider 12, the first split unit 2 can slide in the radial direction during quenching, thereby limiting the deformation of the thin-walled cylinder 1 while avoiding damage to it. The present invention provides the foot or the sliding assembly at the bottom of the first tripod 4, which can ensure that the cylinder will not be partially dumped during the thermal expansion process, and can also cooperate with the special material frame 13 for radial thermal expansion guidance.

[0053] The first inner rod 6 is in axial contact with the inner wall of the thin-walled cylinder 1, and the first outer rod 7 is in axial contact with the outer wall of the thin-walled cylinder 1; that is, after installation, the first inner rod 6 and the first outer rod 7 are both vertically arranged, and the first inner rod 6 is close to the inner wall of the thin-walled cylinder 1, and the first outer rod 7 is close to the outer wall of the thin-walled cylinder 1.

[0054] The three vertices of the first tripod 4 and the first triangular block 5 are detachably fixedly connected in the axial direction through one first inner rod 6 and two first outer rods 7, and the first inner rod 6 is located between the two first outer rods 7 in the circumferential direction. Specifically, the triangular dimensions of the first tripod 4 and the first triangular block 5 are the same, corresponding to each other in the axial direction, and the vertices located inside the thin-walled cylinder 1 are detachably connected up and down through the first inner rod 6, and the two vertices located outside the thin-walled cylinder 1 are connected up and down through the first outer rod 7. In addition, the first outer rod 7, the first inner rod 6, and the first outer rod 7 are adjacent in sequence in the circumferential direction, and the adjacent spacing in the circumferential direction is consistent, and is consistent with the adjacent spacing in the circumferential direction of the first split unit 2 and the second split unit 3.

[0055] Corresponding to the first split unit 2, the second split unit 3 includes a second tripod 8, a second triangular block 9, and a second rod; the second rod includes a second inner rod 10 and a second outer rod 11. The second tripod 8 and the second triangular block 9 are both formed into a triangular shape by a connecting block, that is, the three vertices are connected by the connecting block; the bottom of the second tripod 8 can be fixedly provided with a foot in the radial direction, and the bottom of the second tripod 8 can be specifically provided with two said foots, and the said foots have a supporting function; further, the said foot includes a sliding assembly, and the said sliding assembly includes a slider 12, and the said slider 12 is extended in the radial direction. The number of the said sliders 12 of each second tripod 8 can be two, and the two said sliders 12 are arranged in parallel. By providing the said slider 12, the second split unit 3 can slide in the radial direction during quenching, thereby limiting the deformation of the said thin-walled cylinder 1 while avoiding damage to it. The present invention provides the foot or the sliding assembly at the bottom of the second tripod 8 to ensure that the cylinder will not partially tip over during thermal expansion, and can also cooperate with a dedicated material frame 13 to guide radial thermal expansion.

[0056] The second inner rod 10 is in axial contact with the inner wall of the thin-walled cylinder 1, and the second outer rod 11 is in axial contact with the outer wall of the thin-walled cylinder 1; that is, after installation, the second inner rod 10 and the second outer rod 11 are both vertically arranged, and the second inner rod 10 is close to the inner wall of the thin-walled cylinder 1, and the second outer rod 11 is close to the outer wall of the thin-walled cylinder 1.

[0057] The three vertices of the second tripod 8 and the second triangular block 9 are detachably fixedly connected in the axial direction by two second inner rods 10 and one second outer rod 11, and the second outer rod 11 is located between the two second inner rods 10 in the circumferential direction. Specifically, the triangular dimensions of the second tripod 8 and the second triangular block 9 are the same, corresponding to each other in the axial direction, and the vertices located inside the thin-walled cylinder 1 are detachably connected up and down by the second inner rod 10, and the two vertices located outside the thin-walled cylinder 1 are connected up and down by the second outer rod 11. In addition, the second outer rod 11, the second inner rod 10, and the second outer rod 11 are adjacent in sequence in the circumferential direction, and the adjacent spacing in the circumferential direction is consistent, and is consistent with the adjacent spacing in the circumferential direction of the first split unit 2 and the second split unit 3.

[0058] In the present invention, the first rod and the second rod are arranged adjacent to each other in the order of the first outer rod 7, the first inner rod 6, the first outer rod 7, the second inner rod 10, the second outer rod 11, the second inner rod 10, and the first outer rod 7 in the circumferential direction; that is, the inner rods and outer rods in the quenching deformation suppression tooling of the thin-walled cylinder 1 are in an alternating state in the circumferential direction; the adjacent distances of the first outer rod 7, the first inner rod 6, the first outer rod 7, the second inner rod 10, the second outer rod 11, the second inner rod 10, and the first outer rod 7 in the circumferential direction are consistent, that is, in the quenching deformation suppression tooling of the thin-walled cylinder 1, the inner rods and the outer rods are equidistantly distributed in the circumferential direction when they are arranged alternately. In the present invention, the first inner rod 6 and the second inner rod 10 are inner rods, and the first outer rod 7 and the second outer rod 11 are outer rods.

[0059] As a selective explanation of the detachable fixation, a first lower protrusion is axially provided at the three vertices of the first tripod 4, and the first lower protrusion faces the first triangular block 5; a first upper protrusion is axially provided at the three vertices of the first triangular block 5, and the first upper protrusion faces the first tripod 4; the first lower protrusion and the first upper protrusion are detachably fixedly connected via the first rod member.

[0060] A second lower protrusion is axially provided at the three vertices of the second tripod 8, and the second lower protrusion faces the second triangular block 9; a second upper protrusion is axially provided at the three vertices of the second triangular block 9, and the second upper protrusion faces the second tripod 8; the second lower protrusion and the second upper protrusion are detachably fixedly connected via the second rod member.

[0061] Furthermore, the first lower convex rod, the first upper convex rod, the second lower convex rod, and the second upper convex rod are all provided with an axle pin hole, and the first rod member and the second rod member are correspondingly provided with an axle pin hole; the first lower convex rod and the first upper convex rod are both detachably fixedly connected to the first rod member via an axle pin and an axle pin hole; the second lower convex rod and the second upper convex rod are both detachably fixedly connected to the second rod member via an axle pin and an axle pin hole.

[0062] Specifically, for the first split unit 2, the first inner rod 6 and the first outer rod 7 are both hollow rods; the first lower convex rods are axially arranged at the three vertices of the first tripod 4, and the first upper convex rods are axially arranged at the three vertices of the first triangular block 5, and the first lower convex rods and the first upper convex rods are both provided with axle pin holes in the horizontal direction, and the first inner rod 6 and the first outer rod 7 are respectively provided with axle pin holes at upper and lower positions; during installation, the first inner rod 6 and the first outer rod 7 are respectively correspondingly sleeved on the outer wall of the first lower convex rod, and the axle pin is inserted into the pin hole so that the axle pin penetrates the first inner rod 6 and the first lower convex rod, and the axle pin penetrates the first outer rod 7 and the first lower convex rod; then, the first upper convex rod is respectively correspondingly inserted into the first inner rod 6 or the first outer rod 7, and the axle pin is inserted into the pin hole so that the axle pin penetrates the first inner rod 6 and the first upper convex rod, and the axle pin penetrates the first outer rod 7 and the first upper convex rod.

[0063] For the second split unit 3, the second inner rod 10 and the second outer rod 11 are both hollow rods; the second lower convex rods are axially arranged at the three vertices of the second tripod 8, and the second upper convex rods are axially arranged at the three vertices of the second triangular block 9, and the second lower convex rods and the second upper convex rods are both provided with axle pin holes in the horizontal direction, and the second inner rod 10 and the second outer rod 11 are respectively provided with axle pin holes at upper and lower positions; during installation, the second inner rod 10 and the second outer rod 11 are respectively sleeved on the outer wall of the second lower convex rod, and the axle pin is inserted into the pin hole so that the axle pin penetrates the second inner rod 10 and the second lower convex rod, and the axle pin penetrates the second outer rod 11 and the second lower convex rod; then, the second upper convex rod is respectively inserted into the second inner rod 10 or the second outer rod 11, and the axle pin is inserted into the pin hole so that the axle pin penetrates the second inner rod 10 and the second upper convex rod, and the axle pin penetrates the second outer rod 11 and the second upper convex rod.

[0064] In practical application of the present invention, the first inner rod 6, the first outer rod 7, the second inner rod 10, and the second outer rod 11 can all be hollow rods, and the first inner rod 6, the first outer rod 7, the second inner rod 10, and the second outer rod 11 all have sizes of various specifications, and the diameter intervals of different specifications are 1mm; that is, the inner and outer rods can be configured with a number of hollow rods with diameter intervals of 1mm. Since most actual cylinders are not ideally circular, gaps will appear. By replacing rods of different diameters to adjust the contact tightness, rather than designing additional structures to control the size of the triangular blocks, the structural stability of the overall structure under high temperature and rapid cooling conditions is greatly improved.

[0065] For batch applications, see Figure 5-Figure 6As shown, the present invention also provides a device for suppressing quenching deformation of a thin-walled cylinder 1, and the device for suppressing quenching deformation of a thin-walled cylinder 1 includes any of the above-mentioned thin-walled cylinder 1 quenching deformation suppressing tools; the device for suppressing quenching deformation of a thin-walled cylinder 1 also includes a material frame 13. The material frame 13 is designed to be circular, matching the thermal expansion direction of the cylinder, and is designed with a guide structure to constrain the thermal expansion direction of the cylinder. Specifically, a guide block 14 is provided at the bottom of the material frame 13, which is radially slidably matched with the first tripod 4 and the second tripod 8. For example, two sliders 12 are fixedly provided at the bottom of the first tripod 4 and the second tripod 8 in the radial direction, and the guide block 14 is located between the two sliders 12 of the same tripod, and the slider 12 slides radially with the guide block 14; of course, a slide groove for the slider 12 to slide can also be further provided on the guide block 14.

[0066] As an explanation of the quenching deformation suppression tooling of the thin-walled cylinder 1, the mass of the quenching deformation suppression tooling of the thin-walled cylinder 1 usually needs to be controlled within 200kg to meet the load-bearing requirements of the solid solution furnace frame 13; the quenching deformation suppression tooling of the thin-walled cylinder 1 needs to be able to maintain stability under thermal environment conditions; the structure of the quenching deformation suppression tooling of the thin-walled cylinder 1 should consider the stiffness deformation requirements under thermal environment, and need to take into account lightweight and uniform heating; because the temperature is high during solid solution and the temperature changes dramatically during quenching, the structure of the quenching deformation suppression tooling of the thin-walled cylinder 1 needs to adapt to the thermal expansion of the cylinder.

[0067] In the present invention, the thin-walled cylinder 1 quenching deformation suppression tooling can be used to suppress the quenching deformation of the thin-walled cylinder 1, and has a simple structure without a complex electromechanical control system; it has high environmental adaptability and can adapt to high temperature environments and liquid environments; it has a small dead weight and can meet the load-bearing requirements of the solid solution furnace frame 13. The installation process of the present invention is simple, the overall structure is lightweight, the total heat capacity is small, and the temperature uniformity is good.

[0068] Since the thin-walled cylinder 1 (such as an aluminum alloy cylinder) needs to be subjected to solution quenching treatment after spinning, the cylinder will be deformed during the process, thus failing to meet the shape accuracy requirements; and conventional tooling is mostly made of steel, which is inconsistent with the thermal expansion coefficient of the thin-walled cylinder 1. Therefore, the present invention also provides a use of a thin-walled cylinder 1 quenching deformation suppression tool as described above in suppressing the quenching deformation of the thin-walled cylinder 1; the thin-walled cylinder 1 quenching deformation suppression tool can suppress the quenching deformation of the thin-walled cylinder 1.

[0069] The present invention also provides a method for suppressing quenching deformation of a thin-walled cylinder 1, wherein the quenching deformation of the thin-walled cylinder 1 is suppressed by using any of the above-mentioned thin-walled cylinder 1 quenching deformation suppression tools; the first split unit 2 and the second split unit 3 are both multiple; the first split unit 2 and the second split unit 3 are alternately arranged along the circumferential direction. In addition, during the quenching process, the absolute positions of the first split unit 2 and the second split unit 3 are not fixed; that is, the first split unit 2 and the second split unit 3 are not fixed to the external structure or the ground, or the first split unit 2 and the second split unit 3 are not fixed in the radial direction, so as to control the deformation of the thin-walled cylinder 1 without affecting the free thermal expansion of the thin-walled cylinder 1.

[0070] In the present invention, the method for suppressing quenching deformation of the thin-walled cylinder 1 comprises the following steps:

[0071] S1, determine the number of units of the first split unit 2 and the second split unit 3, the unit number is piece; the unit number of the first split unit 2 and the second split unit 3 satisfies that the total number of internal rods is not less than the theoretical value of internal rods; the total number of internal rods is the sum of the number of the first internal rods 6 and the second internal rods 10, the unit is root.

[0072] Since the first split unit 2 and the second split unit 3 are alternately arranged along the circumferential direction, the first split unit 2 and the second split unit 3 have the same number of units; the total number of inner rods is substantially the number of rods in contact with the inner wall of the thin-walled cylinder 1 .

[0073] After determining the theoretical value of the inner rod, it is necessary to ensure that the number of rods in contact with the inner wall of the thin-walled cylinder 1 is not less than the theoretical value of the inner rod, so as to control the deformation of the thin-walled cylinder 1. In the present invention, the total amount of the inner rods must meet the installation requirements of the first split unit 2 and the second split unit 3, and not less than the theoretical value of the inner rod. Exemplarily, the total amount of the inner rods can be: the minimum number selected under the conditions of meeting the installation requirements of the first split unit 2 and the second split unit 3 and being not less than the theoretical value of the inner rod. In the present invention, the total amount of the inner rods is an integer multiple of 3, that is, the total amount of the inner rods meets the integer multiple of 3 and is not less than the theoretical value of the inner rod; on this basis, the unit quantities of the first split unit 2 and the second split unit 3 are both the values ​​after the total amount of the inner rods is divided by 3.

[0074] In the present invention, the inner rod theoretical value is obtained by analyzing the theoretical number of edges, and the inner rod theoretical value is equal to half of the theoretical number of edges.

[0075] The theoretical number of edges is obtained by analyzing one of Formula 1, Formula 2, and Formula 3;

[0076] The formula 1 is:

[0077] The formula 2 is:

[0078] The formula three is:

[0079] In Formulas 1 to 3, d1 is the preset convex deformation amount, in mm; d2 is the preset concave deformation amount, in mm; d is the preset average deformation amount, in mm; n is the theoretical number of sides, in pieces; and D is the outer diameter of the thin-walled cylinder 1, in mm.

[0080] In the present invention, the preset convex deformation amount is the expected convex deformation amount that needs to be achieved during production, the preset concave deformation amount is the expected convex deformation amount that needs to be achieved during production, and the preset average deformation amount is the expected convex deformation amount that needs to be achieved during production.

[0081] In Formulas 1 to 3, the deformation amount refers to the size of the plastic deformation generated by the thin-walled cylinder 1 after quenching, the convex deformation amount refers to the size of the radially convex deformation of the thin-walled cylinder 1, the concave deformation amount refers to the size of the radially concave deformation of the thin-walled cylinder 1, and the average deformation amount refers to the average value of the radially concave and convex deformation sizes of the thin-walled cylinder 1.

[0082] Formula 1 is derived by assuming that the cylinder is deformed into a regular polygon, and the distance from the polygon vertex to the arc; Formula 2 is derived by assuming that the cylinder is deformed into a regular polygon, and the distance from the arc to the midpoint of each side of the polygon; Formula 3 is derived by adding Formula 1 and Formula 2 and taking the average.

[0083] Since a regular polygon is the maximum deformation form that a cylinder can theoretically produce, Formula 1 can accurately reflect the maximum value of the convex deformation, Formula 2 can accurately reflect the maximum value of the concave deformation, and Formula 3 can accurately reflect the maximum value of the average deformation.

[0084] S2, after determining the number of units of the first split unit 2 and the second split unit 3; the thin-walled cylinder 1 quenching deformation suppression tool is installed in conjunction with the thin-walled cylinder 1, and the thin-walled cylinder 1 quenching deformation suppression tool is used to suppress the quenching deformation of the thin-walled cylinder 1. In the present invention, the theoretical number of sides is preferably obtained by analysis according to Formula 3.

[0085] In the present invention, the process of installing the quenching deformation suppression tooling of the thin-walled cylinder 1 and the thin-walled cylinder 1 in coordination is as follows: after determining the number of units of the first split unit 2 and the second split unit 3, the thin-walled cylinder 1 is divided into equal parts and marked according to the number of the first split unit 2 and the second split unit 3; according to the equal division marks, the first tripod 4 and the second tripod 8 are alternately installed at the lower end of the thin-walled cylinder 1, and then the first inner rod 6 and the first outer rod 7 are correspondingly installed on the first tripod 4, and the second inner rod 10 and the second outer rod 11 are correspondingly installed on the second tripod 8; thereafter, the first triangular block 5 and the second triangular block 9 are installed on the upper side of the thin-walled cylinder 1, the first triangular block 5 corresponds to the first tripod 4 up and down, and the second triangular block 9 corresponds to the second tripod 8 up and down.

[0086] For example:

[0087] The outer diameter of the thin-walled cylinder 1 is 3350 mm, the height is 900 mm, and the thickness is 8.5 mm, of which the reinforcing rib is 4.5 mm thick, the skin is 4 mm, and the material is 2219 aluminum alloy. According to formula 3, the number of inner rods in the quenching deformation suppression tooling of the deformed thin-walled cylinder 1 is controlled, thereby controlling the number of units of the first split unit 2 and the second split unit 3 in the quenching deformation suppression tooling of the thin-walled cylinder 1.

[0088] See also Figure 7 As shown, for a cylinder with an outer diameter of 3350mm, if the theoretical deformation is controlled within 2mm, 45 edges are required, that is, the theoretical value of the inner rod is 22.5; see Figure 3 As shown, 24 inner rods are actually taken, and the number of units of the first split unit 2 and the second split unit 3 is 8, and the first split unit 2 and the second split unit 3 are alternately arranged along the circumference of the thin-walled cylinder 1. The height of the tooling is 920mm, the material is Q235 steel, and the inner rods and outer rods are both hollow rods. During installation, place the 3350mm cylinder on the material frame 13, mark the positions of the cylinder 16 equal parts, and then place the first tripod 4 and the second tripod 8 alternately, and place them on the lower side of the cylinder in sequence according to the marks; then insert the hollow into the protrusions of the first tripod 4 and the second tripod 8 in sequence, and insert the lower pin to fix it; then, assemble the first triangular block 5 and the second triangular block 9 in sequence, and insert the upper pin shaft to fix it.

[0089] In addition, the present invention makes the following 7 analyses during the exploration process:

[0090] 1. Assume that after quenching, the cylinder undergoes maximum deformation in all regions under the constraints of inner and outer rods. In fact, as the number of rods increases, the spacing between the rods decreases, and the arc length of the cylinder sandwiched between adjacent rods will shorten. The cylinder itself has a certain thickness, and it is sufficient to reduce the stiffness to a certain arc length, and the maximum possible deformation will not be reached.

[0091] 2. Assume that the deformation of the cylinder approaches a regular polygon.

[0092] 3. Assume that the cylinder is deformed from a circle to a regular polygon, and the average of the sum of the distance from the vertex of the polygon to the arc and the distance from the midpoint of each side of the polygon to the arc is the deformation; in fact, the deformation is far from being so large.

[0093] 4. Assume that the circular circumference of the cylinder remains unchanged after deformation.

[0094] 5. The more rods there are and the smaller the distance between the rods, the smaller the theoretical limit deformation that can be produced.

[0095] 6. See Figure 8 As shown, according to the results of the solution quenching experiment of the 2219 aluminum alloy ribbed thin-walled cylinder 1 with a diameter of 873 mm, the quenching deformation of the thin-walled cylinder 1 is in the form of wave wrinkling, that is, concave and convex deformations are accompanied.

[0096] 7. The staggered distribution of inner and outer rods in the present invention has the same effect as the paired distribution of inner and outer rods, and the number of rods is only half. Taking 6 rods as an example, if the inner and outer rods are arranged at the same position of the thin-walled cylinder 1, the three-concave and three-convex situation cannot be limited, and only the two-concave and two-convex situation can be limited; while there are still 6 rods and the staggered distribution can suppress the deformation of the three-concave and three-convex, which is consistent with the effect of 12 rods with the paired distribution of the inner and outer rods. At the same time, compared with the distribution of the inner and outer rods at the same position of the thin-walled cylinder 1, the staggered distribution can form a triangular structure in each unit, which can ensure that each triangular unit will not fall over during the thermal expansion process and improve the stability of the structure.

[0097] Based on the above analysis, the present invention proposes the thin-walled cylinder 1 quenching deformation suppression tooling and the thin-walled cylinder 1 quenching deformation suppression method. The present invention can control the deformation of the cylinder without affecting the free thermal expansion of the cylinder, and realize the coordinated regulation of the solid solution quenching shape of the high diameter-to-thickness ratio thin-walled cylinder 1 (such as: aluminum alloy ribbed cylinder); the present invention achieves the purpose of limiting the straightness of the cylinder generatrix by limiting the maximum deformation of the cylinder between adjacent rods.

[0098] Based on the extension of the technical concept of the present invention, the present invention also provides a method for suppressing quenching deformation of a thin-walled cylinder 1, comprising: performing stiffness compensation on the thin-walled cylinder 1 during quenching; the stiffness compensation adds rod constraints on several generatrixes of the thin-walled cylinder 1. In the present invention, the thin-walled cylinder 1 may include or be: a cylinder structure obtained by rotating around a generatrix; the thin-walled cylinder 1 may include one or more of a cylindrical cylinder and a conical cylinder. In the present invention, the inner and outer walls of the thin-walled cylinder 1 may have structural features such as reinforced ribs.

[0099] In the present invention, the stiffness compensation includes: selecting multiple local positions on the thin-walled cylinder 1, and installing rods at the local positions; the rods are in axial contact with the thin-walled cylinder 1 (the rods extend axially and contact with the thin-walled cylinder 1), and are detachably fixedly connected with the thin-walled cylinder 1; the rods move radially with the thin-walled cylinder 1 during the quenching process; the rods include an inner rod and an outer rod, the inner rod is in contact with the inner wall of the thin-walled cylinder 1, and the outer rod is in contact with the outer wall of the thin-walled cylinder 1. In the present invention, the inner rod and the outer rod are alternately arranged at each local position (only the inner rod or the outer rod is arranged at each local position, and the inner rod and the outer rod are arranged in sequence along the circumferential direction); or, the inner rod and the outer rod are arranged at each local position (the inner rod and the outer rod are arranged oppositely).

[0100] In the present invention, as an optional embodiment, the distances between adjacent local positions in the circumferential direction may be the same; as another optional embodiment, the generatrix stiffness evaluation and analysis of the thin-walled cylinder 1 may be performed first to determine the generatrix position with weaker stiffness as the priority position for arranging the rods. The local positions selected in the present invention may include positions where the generatrix stiffness is not greater than the preset stiffness; of course, when the above situation is not considered, or when all generatrix stiffnesses of the thin-walled cylinder 1 are consistent, the rods may only be evenly arranged along the circumference of the thin-walled cylinder 1.

[0101] In the present invention, as an implementation mode, according to the control requirements of quenching deformation, the theoretical number of edges can be analyzed by one of the formulas 1, 2, and 3, and the theoretical number of edges can be used as the minimum number of the local positions, and an integer is taken; the number of the local positions can be an even number; the thin-walled cylinder 1 can be a cylindrical cylinder; when the inner rod and the outer rod are arranged alternately, the number of the local positions must meet the requirements of alternating arrangement. The present invention fixes and assembles the rods individually or in combination on the cylinder busbar at the local positions to ensure that during the quenching of the cylinder, the rods can be consistently close to the thin-walled cylinder and constrain its deformation in the busbar direction; in the alternating arrangement of the inner rod and the outer rod, the present invention can connect the rods at the three adjacent local positions as a whole. The stiffness compensation in the present invention is the local busbar stiffness compensation, and the overall stiffness of the thin-walled cylinder 1 is increased and uniform through the local busbar stiffness compensation, thereby reducing the occurrence of cylinder distortion and radial deformation differences during the quenching process, thereby achieving the effect of suppressing deformation.

[0102] The above technical solutions of the present invention are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the protection scope of the present invention.

Claims

1. A thin-walled cylinder quenching deformation suppression tool, characterized in that: The thin-walled cylinder quenching deformation suppression tooling comprises a first split unit and a second split unit; The first split unit and the second split unit are not fixed in the radial direction; The first split unit includes a first tripod, a first triangular block, and a first rod; the first rod includes a first inner rod and a first outer rod; the first inner rod is in axial contact with the inner wall of the thin-walled cylinder, and the first outer rod is in axial contact with the outer wall of the thin-walled cylinder; the three vertices of the first tripod and the first triangular block are detachably fixedly connected in the axial direction through one first inner rod and two first outer rods, and the first inner rod is located between the two first outer rods in the circumferential direction; The second split unit includes a second tripod, a second triangular block, and a second rod; the second rod includes a second inner rod and a second outer rod; the second inner rod is in axial contact with the inner wall of the thin-walled cylinder, and the second outer rod is in axial contact with the outer wall of the thin-walled cylinder; the three vertices of the second tripod and the second triangular block are detachably fixedly connected in the axial direction by two second inner rods and one second outer rod, and the second outer rod is circumferentially located between the two second inner rods.

2. The thin-walled cylinder quenching deformation suppression tool according to claim 1, characterized in that: The bottoms of the first tripod and the second tripod are both provided with feet in the radial direction.

3. The thin-walled cylinder quenching deformation suppression tool according to claim 1, characterized in that: The three vertices of the first tripod are all provided with first lower protrusions along the axial direction, and the first lower protrusions face the first triangular block; the three vertices of the first triangular block are all provided with first upper protrusions along the axial direction, and the first upper protrusions face the first tripod; the first lower protrusions and the first upper protrusions are detachably fixedly connected by the first rod; A second lower protrusion is axially provided at the three vertices of the second tripod, and the second lower protrusion faces the second triangular block; a second upper protrusion is axially provided at the three vertices of the second triangular block, and the second upper protrusion faces the second tripod; the second lower protrusion and the second upper protrusion are detachably fixedly connected via the second rod member.

4. The thin-walled cylinder quenching deformation suppression tool according to claim 3, characterized in that: The first lower convex rod, the first upper convex rod, the second lower convex rod, and the second upper convex rod are all provided with an axle pin hole, and the first rod member and the second rod member are correspondingly provided with an axle pin hole; the first lower convex rod and the first upper convex rod are both detachably fixedly connected to the first rod member via an axle pin and an axle pin hole; the second lower convex rod and the second upper convex rod are both detachably fixedly connected to the second rod member via an axle pin and an axle pin hole.

5. The thin-walled cylinder quenching deformation suppression tool according to claim 1, characterized in that: There are a plurality of the first split units and a plurality of the second split units; the first split units and the second split units are alternately arranged along the circumferential direction.

6. The thin-walled cylinder quenching deformation suppression tool according to claim 5, characterized in that: The first rod and the second rod are arranged adjacent to each other in the order of the first outer rod, the first inner rod, the first outer rod, the second inner rod, the second outer rod, the second inner rod and the first outer rod in the circumferential direction; the adjacent distances of the first outer rod, the first inner rod, the first outer rod, the second inner rod, the second outer rod, the second inner rod and the first outer rod in the circumferential direction are consistent.

7. A thin-walled cylinder quenching deformation suppression device, characterized in that: The thin-walled cylinder quenching deformation suppression device comprises the thin-walled cylinder quenching deformation suppression tooling according to any one of claims 1 to 6; The thin-walled cylinder quenching deformation suppression device further comprises a material frame, and a guide block which is radially slidably matched with the first tripod and the second tripod is provided at the bottom of the material frame.

8. Use of the thin-walled cylinder quenching deformation suppression tool as claimed in any one of claims 1 to 6 in suppressing the quenching deformation of the thin-walled cylinder.

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