A support device for processing thin-walled parts

Abstract

The embodiment of the present invention relates to a support device for processing thin-walled parts, the device comprising: a first support frame, a second support frame and a support mechanism; the first support frame and the second support frame are connected to form a closed curve through two elastic support mechanisms; the first support frame and the second support frame are used to fit with the inner wall of the thin-walled part when processing the thin-walled part to support the thin-walled part. The present invention solves the problem of out-of-tolerance processing size of the mouth of the thin-walled part by designing a support device, connecting the two support frames and the support mechanism together, and innovatively provides a support force through the support spring of the support mechanism, thereby improving the structural strength of the shell mouth and achieving the purpose of preventing deformation.

Description

Technical Field

[0001] The present invention relates to a supporting device for machining thin-walled parts, and in particular to a supporting device for machining the outer circle of aluminum alloy thin-walled rotating body parts. Background Art

[0002] With the development of science and technology, thin-walled rotating parts are often used in various industrial fields, such as the pressure-bearing shell of underwater vehicles, the shells of some shells, etc. These are rotating parts, and we often need to process these thin-walled rotating parts.

[0003] A large number of thin-walled rotating parts with different diameters have sealing grooves and stoppers for assembly with other rotating parts at both ends. The outer diameters of sealing grooves and stoppers require high dimensional accuracy. However, due to the large thermal expansion coefficient of aluminum alloy materials, the thermal deformation of parts is serious, which easily causes the size of parts to exceed tolerance. At the same time, the thin wall thickness and low strength of the mouth of thin-walled rotating parts lead to the size of the parts exceeding tolerance. In production, the free annealing process of the shell or the rigid clamp clamping + annealing process is adopted to eliminate residual stress and reduce the shell mouth tolerance. However, stress release during annealing can also cause deformation, and rigid tooling causes deformation due to excessive preload or insufficient preload, resulting in loose fixtures without achieving the purpose of anti-deformation, resulting in poor stress relief effect. Therefore, a support device for external turning is designed to improve the structural strength of the shell mouth and achieve the purpose of anti-deformation.

[0004] The existing supporting devices are as follows:

[0005] 1. The first semicircular support frame and the second semicircular support frame are placed correspondingly to form a circular support frame. The first semicircular support frame and the second semicircular support frame are fastened together by bolts and nuts. The circular support frame clamps the mouth of the thin-walled rotating body part. The thin-walled rotating body part is a cylinder and is only used to fasten the outer circle to process the inner circle. However, the important structural features of most thin-walled rotating body parts are on the outer circle, so when processing the outer circle, the processing deformation is out of tolerance. And the circular support frame is a rigid material and will deform after releasing heat. And because the rigid material will expand and contract during heat treatment, it will become loose and cause deformation.

[0006] 2. An upper support sleeve installed on the inner circle of the thin-walled tube, and a lower support sleeve installed on the inner circle of the thin-walled tube corresponding to the upper support sleeve, the upper support sleeve and the lower support sleeve are both in contact with the contour of the contact surface of the inner circle of the thin-walled tube to be processed, and a support tooling is installed between the upper support sleeve and the lower support sleeve, and a device is used to prevent the outer circle of the thin-walled tube from being processed. Although this device can prevent the outer circle from being processed to a certain extent, it can only be used for one inner hole diameter. It is inconvenient to replace thin-walled rotating parts with different diameters.

[0007] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0008] An embodiment of the present invention provides a support device for processing thin-walled parts. Two elastic support mechanisms are designed to solve the problems of deformation of thin-walled parts and processing size differences when processing the outer circle of the port of thin-walled parts. At the same time, two bendable support frames are designed to solve the problem of inconvenient replacement of support frames when processing thin-walled parts of various different diameters.

[0009] To achieve the above-mentioned object, the present invention provides a support device for thin-walled parts processing, comprising: a first support frame, a second support frame and a support mechanism;

[0010] The first support frame and the second support frame are connected to form a closed ring through two elastic support mechanisms;

[0011] The first support frame and the second support frame are used to fit with the inner wall of the thin-walled part when processing the thin-walled part to support the thin-walled part.

[0012] Optional,

[0013] The support mechanism includes an upper connecting screw, a lower connecting screw, an upper top ring, a lower top ring, an upper gasket, a lower gasket, a support spring, a push rod, a sleeve, a first nut, a second nut, a third nut and an adapter;

[0014] The first nut is used to fix the upper connecting screw passing through the upper top ring;

[0015] The second nut is used to fix the lower connecting screw passing through the lower top ring;

[0016] The ejector rod comprises a threaded portion and a non-threaded portion, the non-threaded portion is embedded in the sleeve, and the threaded portion is threadedly connected to the upper ejector ring;

[0017] One end of the adapter is in the shape of a screw, and the other end of the adapter is in the shape of a nut. The adapter at the screw-shaped end is threadedly connected to the lower top ring, and the adapter at the nut-shaped end is fixedly connected to the bottom of the casing;

[0018] The support spring is nested in the outer periphery of the sleeve, one end of the support spring is connected to one side of the upper gasket, and the other end of the support spring is connected to one side of the lower gasket;

[0019] The other side of the upper gasket is connected to the upper top ring;

[0020] The other side of the lower gasket is connected to one side of the third nut;

[0021] The other side of the third nut is connected to the top surface of the adapter.

[0022] Optional,

[0023] The sleeve is a hollow cylindrical shape, and the outer side of the sleeve is threaded;

[0024] Two corresponding grooves are provided on the inner side of the sleeve;

[0025] One end of the groove is open.

[0026] Optional,

[0027] Two corresponding limit blocks are provided on both sides of the non-threaded end of the push rod;

[0028] The limiting block is adapted to the groove.

[0029] Optional,

[0030] The length d of the limit block 1 The length d of the groove 2 The ratio of k∈[1 / 6, 1 / 12];

[0031] The height of the sleeve is equal to the height of the non-threaded portion.

[0032] Optional,

[0033] The support frame includes a plurality of first connection blocks, a plurality of second connection blocks, a connection screw and a fastening nut;

[0034] The first connection block and the second connection block are connected at intervals;

[0035] The first connecting block and the second connecting block are connected by a connecting screw;

[0036] The connecting screw is fixed by the fastening nut;

[0037] The second support frame is the same in size and structure as the first support frame and is located opposite to the first support frame.

[0038] Optional,

[0039] The support device is made of heat-resistant stainless steel;

[0040] The support spring material is a heat-resistant spring.

[0041] The above technical scheme has the following beneficial effects: the present invention solves the problems of deformation of thin-walled parts and processing size differences when processing the outer circle of the port of thin-walled parts by designing two elastic support mechanisms, improves the structural strength of the mouth of thin-walled parts, achieves the purpose of preventing deformation, and ensures the accuracy of thin-walled parts processing; at the same time, two bendable support frames are designed to solve the problem of inconvenient replacement of support frames when processing thin-walled parts of various different diameters, saves production costs, and ensures processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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 these drawings without paying creative work.

[0043] Figure 1 It is a structural schematic diagram of a support device for thin-walled parts processing according to an embodiment of the present invention;

[0044] Figure 2 is a structural schematic diagram of a support mechanism provided by an embodiment of the present invention;

[0045] Figure 3 is a schematic structural diagram of a sleeve provided in an embodiment of the present invention;

[0046] Figure 4 is a schematic structural diagram of a push rod provided by an embodiment of the present invention;

[0047] Figure 5 It is a structural schematic diagram of a first support frame provided in an embodiment of the present invention.

[0048] Explanation of symbols:

[0049] The first support frame-1, the second support frame-2, the support mechanism-3, the upper connecting screw-311, the lower connecting screw 312, the upper top ring 321, the lower top ring 322, the upper gasket 331, the lower gasket 332, the support spring 341, the top rod 351, the sleeve 361, the first nut 371, the second nut 372, the third nut 373, the adapter 381, the limit block 3511, the groove 3611, the first connecting block 111, the second connecting block 112, the connecting screw 113, and the fastening nut 114. DETAILED DESCRIPTION

[0050] 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.

[0051] In the prior art, only two support frames are arranged on the inner side of the thin wall, and the two support frames are fixedly connected by bolts and nuts. Although this device can prevent the deformation of the outer circle processing to a certain extent, it can only be used for one inner hole diameter. It is inconvenient to replace thin-walled rotating body parts with different diameters, and they will still fall off during heat treatment, and cannot prevent deformation well.

[0052] The present application designs a support device for processing thin-walled parts, and combines two support frames and two elastic support mechanisms into a closed support device. When processing the thin-walled parts, the two support frames fit against the inner walls of the thin-walled parts, and the support mechanism includes a support spring. By compressing the spring, a support force is generated to support the two support frames, and then support the thin-walled parts to process the outer circle.

[0053] The technical solution of the present invention is described below by means of specific embodiments in conjunction with the accompanying drawings:

[0054] like Figure 1 As shown, the present invention provides a structural schematic diagram of a support device for thin-walled parts processing, including:

[0055] A first support frame 1, a second support frame 2 and a support mechanism 3;

[0056] The first support frame 1 and the second support frame 2 are connected to form a closed ring through two elastic support mechanisms 3;

[0057] The first support frame 1 and the second support frame 2 are used to fit with the inner wall of the thin-walled part when processing the thin-walled part, so as to support the thin-walled part.

[0058] In an optional embodiment, a thin-walled rotating body type part has a high design precision requirement for the outer circle size of its port, and a support device is needed to support the inner wall of the thin-walled part to prevent deformation, so as to better process the thin-walled outer circle. Therefore, the present invention designs a support device, firstly connects two support frames into a closed curve through two elastic support mechanisms, and then places the support device at the port of the inner wall of the thin-walled part to fit with the inner wall; because the support mechanism 3 is elastic, it can be compressed to generate a support force to support the two support frames, and then support the thin-walled part. Among them, the two support frames can be bent freely and can be bent into a state that fits with the inner wall of the thin-walled part. When the diameter of the thin-walled part is small, that is, between 400mm and 800mm, its contact area with the thin-walled part is larger, and the fitting state will be better.

[0059] Figure 2 It is a structural schematic diagram of the support mechanism provided by an embodiment of the present invention, as shown in the figure:

[0060] Optional,

[0061] The support mechanism 3 includes an upper connecting screw 311, a lower connecting screw 312, an upper top ring 321, a lower top ring 322, an upper gasket 331, a lower gasket 332, a support spring 341, a top rod 351, a sleeve 361, a first nut 371, a second nut 372, a third nut 373 and an adapter 381;

[0062] The first nut 371 is used to fix the upper connecting screw 311 passing through the upper top ring;

[0063] The second nut 372 is used to fix the lower connecting screw 312 passing through the lower top ring;

[0064] The ejector rod 351 includes a threaded portion and a non-threaded portion, the non-threaded portion is embedded in the sleeve 361, and the threaded portion is threadedly connected to the upper ejector ring 321;

[0065] One end of the adapter 381 is in the shape of a screw, and the other end of the adapter 381 is in the shape of a nut. The adapter 381 at the screw-shaped end is threadedly connected to the lower top ring 322, and the adapter 381 at the nut-shaped end is fixedly connected to the bottom of the sleeve 361.

[0066] The support spring 341 is nested in the outer periphery of the sleeve 361, one end of the support spring 341 is connected to one side of the upper gasket 331, and the other end of the support spring 341 is connected to one side of the lower gasket 332;

[0067] The other side of the upper gasket 331 is connected to the upper top ring 321;

[0068] The other side of the lower gasket 332 is connected to one side of the third nut 373;

[0069] The other side of the third nut 373 is connected to the top surface of the adapter 381 .

[0070] First, fix the lower connecting screw 311 through the lower top ring 322, and then thread the adapter 381 at one end of the screw to connect the lower top ring 322, then nest the non-threaded part of the top rod 351 in the sleeve 361, and fix the nested sleeve 361 to the nut-shaped end of the adapter 381, and then fix the third nut 373, the lower gasket 332, the support spring 341, and the upper gasket 331 on the sleeve 361 in sequence, the bottom surface of the third nut 373 contacts the top surface of the adapter 381, and then thread the threaded part of the top rod 351 to the upper top ring 321, and finally fix the upper connecting screw 311 through the upper top ring 321. Through this process, a support mechanism 3 is formed to support the two support frames;

[0071] As described above, the upper top ring 321 is designed to connect the first support frame 1 with the support mechanism 3, and the lower top ring 322 is designed to connect the second support frame 2 with the support mechanism 3. The upper top ring 321 designed in the present invention is in the shape of a U-shaped body, and its two sides are respectively provided with round holes adapted to the upper connecting screw 311, so that the upper connecting screw 311 passes through the upper top ring 321 and is fixed with the first nut 371, and the first support frame 1 is connected to the upper connecting screw 311;

[0072] An upper gasket 331 is designed below the upper top ring 322. The upper gasket 331 is round. Since the bottom surface of the upper top ring 321 is square, the contact area with the support spring 341 is small. In order to better contact with the support spring 341, a circular upper gasket 331 is provided, which can also reduce the wear of the upper top ring 321.

[0073] The adapter 381 is provided to connect one end to the lower top ring 322 and the other end to the sleeve 361. The lower top ring 322 is not directly connected to the sleeve 361 because the diameter of the hole in the lower top ring 322 is smaller than the diameter of the sleeve, and the sleeve 361 cannot be directly threaded into the lower top ring 322.

[0074] The third nut 373 is provided so that when the nut is tightened, the support spring 341 can be pushed upward, so that a force of the support spring 341 causes the push rod to move upward until the limit block 3511 is stuck at the top of the groove, and then the nut is tightened continuously, the support spring 341 is compressed, and a supporting force is generated to support the two support frames. A lower gasket 332 is provided above the third nut 373, and the contact area between the support spring 341 and the lower gasket 332 is larger than the contact area between the support spring 341 and the third nut 373. By tightening the third nut 373, the lower gasket 332 compresses the support spring 341 upward, and also prevents the support spring 341 from rotating with the third nut 373, which would cause the support spring 341 to fail due to poor contact.

[0075] Figure 3 It is a schematic diagram of the structure of the sleeve provided by an embodiment of the present invention, as shown in the figure:

[0076] Optional,

[0077] The sleeve 361 is a hollow cylindrical body, and the outer side of the sleeve 361 is threaded;

[0078] Two corresponding grooves 3611 are provided on the inner side of the sleeve 361;

[0079] One end of the groove 3611 is open.

[0080] Two corresponding grooves 3611 are arranged on the inner side of the sleeve 361, so that the push rod can slide up and down along the grooves 3611. When the push rod 351 is stuck in the grooves 3611, the third nut 373 is tightened, and the support spring is compressed to generate a support force; the outer side of the sleeve 361 is threaded, so that the third nut 373 can move up and down along the sleeve 361. Before and after each use, the nuts, sleeves, etc. are protected with lubricating oil to meet the annealing process of aluminum alloy to remove processing stress, and can be reused repeatedly.

[0081] Figure 4 It is a schematic diagram of the structure of the ejector provided by an embodiment of the present invention, as shown in the figure:

[0082] Optional,

[0083] Two corresponding limit blocks 3511 are provided on both sides of the non-threaded end of the push rod 351;

[0084] The limiting block 3511 is matched with the groove 3611 .

[0085] The limiting block 3511 is provided to limit the position of the top rod 351. The limiting block 3511 can be any geometric body that can be realized in the prior art, such as a cuboid, a cylinder, a sphere, etc. In this application, a cuboid is used as an example. The cuboid is simple in design, saving manpower and time.

[0086] It should be noted that the groove 3611 is adapted to the limit block 3511, that is, when the limit block 3511 is set as a cuboid, the groove 3611 is correspondingly set as a cuboid, so that the limit block 3511 can slide better in the groove 3611, and it can be ensured that when the limit block 3511 slides to the top of the groove 3611, it can be stuck at the top of the groove 3611 and will not slide out directly. When the limit block 3511 is stuck at the top of the groove 3611, the spring is compressed again, which will generate a supporting force, and the spring can have a moving range of ±50mm.

[0087] Optional,

[0088] The length d of the limit block 3511 1 The length d of the groove 3611 2 The ratio of k∈[1 / 6, 1 / 12];

[0089] The height of the sleeve 361 is equal to the height of the non-threaded portion.

[0090] The length d of the limit block 3511 1 The length d of the groove 3611 2 The ratio k∈[1 / 6, 1 / 12], preferably, the length d of the limit block 3511 is set 1 The length d of the groove 3611 2 The ratio k is 1 / 6. The threaded part is completely threaded in the upper top ring, and the height of the non-threaded part is equal to the height of the sleeve, so that the top rod will not slide out of the sleeve when sliding upward.

[0091] Figure 5 : is a schematic diagram of the structure of a first support frame provided by an embodiment of the present invention, as shown in the figure:

[0092] Optional,

[0093] The support frame includes a plurality of first connection blocks 111, a plurality of second connection blocks 112, a connection screw 113 and a fastening nut 114;

[0094] The first connection block 111 and the second connection block 112 are connected at intervals;

[0095] The first connecting block 111 and the second connecting block 112 are connected by a connecting screw 113;

[0096] The connecting screw 113 is fixed by the fastening nut 114;

[0097] The second support frame 2 is the same in size and structure as the first support frame 1 and is located opposite to the first support frame 1 .

[0098] In this embodiment, the first connection block 111 and the second connection block 112 are connected at intervals, and the first connection block 111 and the second connection block 112 can be bent around the connecting screw 113, so as to ensure that each connection block is bent to a state of fitting with the inner wall of the thin-walled part; the diameter of the thin-walled part processed by this application is 400mm. When the diameter of the processed thin-walled part is larger, it is only necessary to increase the same number of the first connection block 111 and the second connection block 112 to adapt to the change in the inner diameter size. It is easy to replace and does not require processing of multiple entire support devices adapted to different diameters, which saves manpower, saves costs, and improves work efficiency. Optional,

[0099] The support device is made of heat-resistant stainless steel;

[0100] The support spring material is a heat-resistant spring.

[0101] Because heat treatment is required when processing the thin-walled parts, the selected support device materials and support springs are heat-resistant, which can effectively prevent the support device from falling off due to heat during the processing, thereby causing the thin-walled parts to deform and cause the processing to be inaccurate. The process flow of processing thin-walled parts is as follows:

[0102] Generally, the parts of rotating bodies have a certain margin inside and outside, the end faces have sealing structures, or the interface dimensions connected to other sections, etc. It is necessary to process the parts through five steps: rough turning, annealing, semi-finishing turning, annealing, and finishing turning; specifically, the rough turning is first, that is, the parts are put on the lathe, the three-jaw or four-jaw chucks of the lathe at both ends are clamped, and the outer circle is rough-turned to light after aligning the parallel body, or a certain margin is left, and then annealing or natural aging treatment is carried out, and semi-finishing turning is carried out, that is, when the parts are put on the lathe, generally one end supports the inner circle, and the other end is placed on the center frame, the inner circle is turned, the wall thickness is measured in the middle, and the processing axis is adjusted. After the inner circle size is completed, the outer circle, end face size, sealing structure, etc. are processed, and the margin is left for secondary annealing. After completion, the outer circle is finished and the size is inspected, and the thin-walled parts are processed.

[0103] The tooling designed in this embodiment is used when semi-finishing the important structural dimensions of the outer cylindrical end face, and is then combined with the annealing process to solve the problems of dimensional deformation and dimensional tolerance.

[0104] The above technical scheme has the following beneficial effects: the present invention solves the problems of deformation of thin-walled parts and processing size differences when processing the outer circle of the port of thin-walled parts by designing two elastic support mechanisms, improves the structural strength of the mouth of thin-walled parts, achieves the purpose of preventing deformation, and ensures the accuracy of thin-walled parts processing; at the same time, two bendable support frames are designed to solve the problem of inconvenient replacement of support frames when processing thin-walled parts of various different diameters, saves production costs, and ensures processing efficiency.

[0105] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A support device for thin-walled parts processing, characterized in that: include: A first support frame, a second support frame and a support mechanism; The first support frame and the second support frame are connected to form a closed ring through two elastic support mechanisms; The first support frame and the second support frame are used to fit with the inner wall of the thin-walled part when processing the thin-walled part, so as to support the thin-walled part; The support mechanism includes an upper connecting screw, a lower connecting screw, an upper top ring, a lower top ring, an upper gasket, a lower gasket, a support spring, a push rod, a sleeve, a first nut, a second nut, a third nut and an adapter; The first nut is used to fix the upper connecting screw passing through the upper top ring; The second nut is used to fix the lower connecting screw passing through the lower top ring; The ejector rod comprises a threaded portion and a non-threaded portion, the non-threaded portion is embedded in the sleeve, and the threaded portion is threadedly connected to the upper ejector ring; One end of the adapter is in the shape of a screw, and the other end of the adapter is in the shape of a nut. The adapter at the screw-shaped end is threadedly connected to the lower top ring, and the adapter at the nut-shaped end is fixedly connected to the bottom of the casing; The support spring is nested in the outer periphery of the sleeve, one end of the support spring is connected to one side of the upper gasket, and the other end of the support spring is connected to one side of the lower gasket; The other side of the upper gasket is connected to the upper top ring; The other side of the lower gasket is connected to one side of the third nut; The other side of the third nut is connected to the top surface of the adapter; The sleeve is a hollow cylindrical shape, and the outer side of the sleeve is threaded; Two corresponding grooves are provided on the inner side of the sleeve; One end of the groove is open; Two corresponding limit blocks are provided on both sides of one end of the non-threaded portion; The limit block is adapted to the groove; The support device is made of heat-resistant stainless steel; The support spring material is a heat-resistant spring.

2. A support device for thin-walled parts processing according to claim 1, characterized in that: The ratio of the length d1 of the stopper to the length d2 of the groove is k∈[1 / 6, 1 / 12]; The height of the sleeve is equal to the height of the non-threaded portion.

3. A support device for thin-walled parts processing according to claim 1, characterized in that: The first support frame includes a plurality of first connection blocks, a plurality of second connection blocks, a connection screw and a fastening nut; The first connection block and the second connection block are connected at intervals; The first connecting block and the second connecting block are connected by a connecting screw; The connecting screw is fixed by the fastening nut; The second support frame is the same in size and structure as the first support frame and is located opposite to the first support frame.

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