Undercarriage part heat treatment deformation control device and heat treatment system
By designing a heat treatment deformation control device for landing gear parts, the mechanical connection of the support shaft, spacer, connecting shaft and limit block is used to solve the problem of deformation of landing gear parts after heat treatment, and effective constraints on the size and height difference of wheel fork openings are achieved, and parts are avoided scrapping.
Patent Information
- Application Number
- CN202421299234.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-07
AI Technical Summary
During the heat treatment process, landing gear parts are prone to warping and deformation due to uneven cooling, resulting in deformation of the wheel fork opening size and the height difference between the wheel fork hole center and the cylinder center line, and cannot be corrected through mechanical processing, resulting in scrapping of parts.
A heat treatment deformation control device for landing gear parts is designed, including a support shaft, a spacer, a connecting shaft and a limiting block. Through mechanical connection, the device is closely cooperated with the landing gear parts, limiting the change in the height difference between the wheel fork opening size and the center of the wheel fork hole from the cylinder.
It effectively restricts the deformation of the height difference between the rear wheel fork opening size and the center of the wheel fork hole from the cylinder center to the heat treatment of landing gear parts, ensures that the deformation of the parts is within the scope of the technical documents, avoids the scrapping of parts, and improves production efficiency.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metal heat treatment processing, and in particular relates to a heat treatment deformation control device and a heat treatment system for landing gear parts. Background Art
[0002] The workpiece will warp due to uneven cooling, and its deformation trend depends on the thermal stress, structural stress and volume deformation at that time. When the thermal stress is dominant, the workpiece bulges toward the fast cooling surface; conversely, when the structural stress is dominant, the slow cooling surface bulges. The faster the cooling speed, the more serious the uneven cooling, and the more significant the warping. The overall structure of the typical "Y-shaped" part in the landing gear part is as follows: Figure 1 and Figure 2 As shown, it includes a cylinder and a wheel fork connected to the cylinder, and wheel fork holes are provided on both ends of the opening side of the wheel fork. The practice of heat treatment of "Y-type" typical parts proves that, whether the "Y-type" typical parts are mounted forward or reverse, the wheel fork opening size is deformed in the direction of increasing the opening, and the height difference from the center of the wheel fork hole to the center line of the cylinder is deformed in the direction of reducing the height difference.
[0003] Typical "Y-type" parts are generally important structural parts on the landing gear. The material is ultra-high strength steel (such as A-100, 300M, etc.), which is quenched with oil. Its strength σ ≥ 1860Mpa, and the length is long (between 1000mm-3500mm). At the same time, the thickness of the part section is uneven, the opening of the fork is large, and the fork structure is relatively complex. During the heat treatment process, the parts are affected by their own gravity and the stress of the heat treatment organization. The opening size of the fork and the height difference from the center of the fork hole to the center of the cylinder are easily deformed. According to historical data, when the heat treatment deformation is not controlled by the fixture, the change in the opening size of the fork is ≥ 2mm, and the change in the height difference from the center of the fork hole to the center of the cylinder is ≥ 1mm, or even larger. Due to the limitation of the part structure, it is impossible to compensate for the deformation of the part by correction after heat treatment. Therefore, once the part is deformed, it will not be processed by mechanical processing, and the part will be directly scrapped, seriously affecting the production efficiency of the enterprise. Utility Model Content
[0004] In view of the current technical problems, the utility model aims to provide a landing gear parts heat treatment deformation control device and a heat treatment system. The landing gear parts heat treatment deformation control device can solve the technical problems of fork opening size and height difference deformation from the fork hole center to the cylinder center line.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A landing gear parts heat treatment deformation control device, its structural features are: comprising a support shaft, a spacer, a connecting shaft and a limit block, the length of the spacer matches the distance between two wheel fork holes; one end of the support shaft can be inserted into a cylinder and fixed by a limit block; the connecting shaft passes through the spacer along the length direction, and the two end portions of the connecting shaft can be detachably fixedly connected to the two wheel fork holes respectively; the support shaft is provided with a slidingly connected adjustment block, the upper surface of the adjustment block abuts against the side wall of the spacer.
[0007] The heat treatment deformation control device of the landing gear parts of the utility model needs to be made of high temperature alloy, and the high temperature performance is more stable than the main material of the landing gear parts. The relevant dimensions of each component in the deformation control device need to be determined according to the opening size of the wheel fork in the landing gear parts and the height difference size from the center of the wheel fork hole to the center line of the cylinder. When the deformation control device is used, the spacer is set between the two wheel fork holes, and the two ends of the spacer are respectively abutted against the inner side walls of the wheel fork hole. The connecting shaft passes through the two wheel fork holes and the spacer, and is fixedly connected to the wheel fork hole, thereby limiting the change in the size of the wheel fork opening. One end of the support shaft is inserted into the cylinder, and the support shaft and the cylinder are fixed by a limit block. The position of the adjustment block is adjusted so that the upper surface of the adjustment block is abutted against the side wall of the spacer, thereby limiting the change in the height difference from the center of the wheel fork hole to the center line of the cylinder. In the heat treatment deformation control device of the landing gear parts of the utility model, each component is mechanically connected so that the landing gear parts and the device are closely matched, thereby playing a restraining role in the heat treatment deformation of the landing gear parts.
[0008] Preferably, the support shaft comprises a small diameter section and a large diameter section connected to each other, and the small diameter section can be sleeved in the cylinder; the limit block is arranged at the connection between the small diameter section and the large diameter section, and the inner and outer side surfaces of the limit block can respectively abut against the outer wall surface of the small diameter section and the inner wall surface of the wheel fork. When the support shaft is connected to the cylinder, the limit block is first sleeved on the bottom of the small diameter section of the support shaft, so that the bottom of the limit block abuts against the end of the large diameter section and the inner wall of the limit block abuts against the outer wall surface of the small diameter section, and then the small diameter section is inserted into the cylinder, so that the outer wall of the limit block abuts against the inner wall surface of the wheel fork, thereby realizing a detachable fixed connection between the support shaft and the cylinder.
[0009] Preferably, the large diameter section is provided with a groove, the adjustment block is detachably fixedly connected to the groove by a second fastener, and a U-shaped groove is provided at the connection between the adjustment block and the second fastener. When the position of the adjustment block needs to be adjusted, the adjustment block only needs to be moved up and down, and the U-shaped groove also moves accordingly, and the position is determined and fixed by the second fastener, and the second fastener can be a combination of bolts and nuts.
[0010] Preferably, the adjustment block comprises a vertical block and a horizontal block which are vertically connected, and the horizontal block is arranged upward; the vertical block is connected to the groove, and the U-shaped groove is arranged on the vertical block.
[0011] Preferably, both ends of the connecting shaft are sleeved with bushings, which are detachably fixedly connected to the connecting shaft by a first fastener, and the bushing is used to abut against the outer wall surface of the wheel fork hole. When the bushing is used, the inner ring of the bushing is arranged in the wheel fork hole, and the outer ring of the bushing abuts against the outer wall surface of the wheel fork hole, thereby protecting the wheel fork hole. The first fastener can be a nut, which is detachably fixedly connected to the connecting shaft by a thread.
[0012] Preferably, both ends of the spacer are provided with stoppers, the connecting shaft passes through the inner hole of the stoppers, and the diameter of the inner hole matches the outer diameter of the connecting shaft. The stoppers are provided to limit the movement of the fork hole in the vertical direction.
[0013] Preferably, the spacer is provided with a plurality of first oil holes, and the plurality of first oil holes are all connected with the inner cavity of the spacer; the support shaft is provided with a through hole along the length direction, and the support shaft side wall is provided with a plurality of second oil holes, and the plurality of second oil holes are all connected with the through hole.
[0014] Preferably, a base is provided at the outer end of the support shaft.
[0015] Based on the same inventive concept, the utility model also provides a landing gear parts heat treatment system, including a heat treatment furnace, a landing gear parts arranged in the heat treatment furnace, and the landing gear parts heat treatment deformation control device as described above; the landing gear parts include a cylinder body and a fork connected to the cylinder body, and fork holes are provided on both ends of the opening side of the fork; one end of the support shaft is fixedly arranged in the cylinder body, and a spacer is arranged between the two fork holes and fixed by a connecting shaft, and the position of the adjustment block is adjusted so that the upper surface of the adjustment block abuts against the side wall of the spacer.
[0016] Preferably, the axis of the support shaft is colinear with the axis of the cylinder.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] 1. The heat treatment deformation control device for landing gear parts of the utility model has various components connected mechanically so that the landing gear parts and the device are closely matched, which plays a restraining role in the heat treatment deformation of the landing gear parts, thereby effectively solving the problems of the deformation of the opening size of the wheel fork and the height difference deformation from the center of the wheel fork hole to the center line of the cylinder after heat treatment of the typical "Y-type" landing gear parts, and controlling the deformation of the parts within the range required by the technical documents.
[0019] 2. The landing gear parts heat treatment deformation control device of the utility model has the advantages of being reusable and easy to assemble and hang. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the landing gear parts structure;
[0021] Figure 2 for Figure 1 A right view structural diagram of ;
[0022] Figure 3 It is a schematic diagram of the connection structure between the landing gear part heat treatment deformation control device and the landing gear part of the utility model;
[0023] Figure 4 for Figure 3 The enlarged structural diagram at A in the middle;
[0024] Figure 5 for Figure 3 Schematic diagram of the connection structure between the middle support shaft and the adjustment block;
[0025] Figure 6 for Figure 5 Schematic diagram of the connection structure between the middle adjustment block and the support shaft;
[0026] Figure 7 for Figure 3 Schematic diagram of the connection structure between the spacer sleeve and the connecting shaft;
[0027] Figure 8 It is a schematic diagram of the structure of the heat treatment system of landing gear parts of the utility model.
[0028] In the figure:
[0029] 1-support shaft; 101-small diameter section; 102-large diameter section; 103-groove; 104-second oil hole; 105-through hole; 2-spacer; 201-first oil hole; 3-connecting shaft; 4-adjusting block; 401-U-shaped groove; 402-vertical block; 403-horizontal block; 5-bushing; 6-first fastener; 7-limiting piece; 8-limiting block; 9-base; 10-second fastener; 11-wheel fork hole; 12-cylinder; 13-wheel fork; 14-heat treatment furnace; 15-stainless steel wire. DETAILED DESCRIPTION
[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.
[0031] like Figure 3 As shown, a landing gear component heat treatment deformation control device comprises a support shaft 1, a spacer 2 and a connecting shaft 3, wherein the length of the spacer 2 matches the distance between the two wheel fork holes 11. Figure 4 and Figure 5As shown, the support shaft 1 is provided with a through hole 105 passing through along the length direction, and a plurality of second oil holes 104 are provided on the side wall of the support shaft 1, and the plurality of second oil holes 104 are all connected with the through hole 105, and a base 9 is provided at the outer end of the support shaft 1. The support shaft 1 comprises a small diameter section 101 and a large diameter section 102 connected to each other, and the small diameter section 101 can be sleeved in the cylinder 12. A limit block 8 is provided at the connection between the small diameter section 101 and the large diameter section 102, and the inner and outer side surfaces of the limit block 8 can respectively abut against the outer wall surface of the small diameter section 101 and the inner wall surface of the fork 13. A groove 103 is provided on the large diameter section 102, and an adjusting block 4 is slidably connected in the groove 103. The adjusting block 4 is an L-shaped structure, comprising a vertical block 402 and a horizontal block 403 connected vertically, and the horizontal block 403 is arranged upward. As shown Figure 6 As shown, a U-shaped groove 401 is provided on the vertical block 402, and the vertical block 402 is detachably fixedly connected to the groove 103 by a second fastener 10. The second fastener 10 is a bolt and a nut. When the position of the adjustment block 4 needs to be adjusted, the nut is loosened, the adjustment block 4 is moved up and down, and the bolt moves in the U-shaped groove 401. Figure 7 As shown, the spacer 2 is provided with a plurality of first oil holes 201, and the plurality of first oil holes 201 are all connected with the inner cavity of the spacer 2. The connecting shaft 3 passes through the spacer 2 in the length direction, and the inner sides of both ends of the spacer 2 are provided with stoppers 7, and the connecting shaft 3 passes through the inner hole of the stopper 7, and the diameter of the inner hole matches the outer diameter of the connecting shaft 3, and the stopper 7 can be a gasket. Both ends of the connecting shaft 3 are sleeved with bushings 5, and the bushings 5 are detachably fixedly connected to the connecting shaft 3 by a first fastener 6. The inner ring of the bushing 5 is arranged in the wheel fork hole 11, and the outer ring of the bushing 5 abuts against the outer wall surface of the wheel fork hole 11, thereby protecting the wheel fork hole 11. The first fastener 6 can be a nut, and the nut is detachably fixedly connected to the connecting shaft 3 by a thread.
[0032] like Figure 8As shown, a landing gear part heat treatment system includes a heat treatment furnace 14, a landing gear part arranged in the heat treatment furnace 14, and a landing gear part heat treatment deformation control device as described above. The landing gear part includes a cylinder 12 and a wheel fork 13 connected to the cylinder 12, and wheel fork holes 11 are provided on both ends of the opening side of the wheel fork 13. First, two limit members 7 are installed in the spacer 2, and the spacer 2 with the limit members 7 installed is placed between the wheel fork holes 11, and the bushing 5 is installed in the two wheel fork holes 11, and then the connecting shaft 3 is inserted into the bushing 5, and finally the first fastener 6 is used for fastening, that is, the wheel fork 13 opening size protection device is installed to limit the change of the wheel fork 13 opening size. The support shaft 1 is connected to the adjustment block 4 and the base 9, and the limit block 8 is installed to the connection between the small diameter section 101 and the large diameter section 102 of the support shaft 1. The cylinder 12 of the landing gear part is inserted upside down to the limit block 8 of the support shaft 1, and the axis of the support shaft 1 is colinear with the axis of the cylinder 12, so that the support shaft 1 is tightly connected to the landing gear part. The height of the adjustment block 4 is adjusted so that the horizontal block 403 is closely tangent to the outer cylindrical surface of the bushing 5, and the second fastener 10 is tightened and fixed, thereby supporting the opening protection device of the wheel fork 13 and limiting the change in the height difference between the center of the wheel fork hole and the center line of the cylinder 12. The above-mentioned assembled parts are placed in the heat treatment furnace 14 through the base 9 for heat treatment, and the landing gear parts and the heat treatment furnace 14 are fixed by the stainless steel wire 15.
[0033] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.
Claims
1. A landing gear parts heat treatment deformation control device, characterized in that: It comprises a supporting shaft (1), a spacer sleeve (2), a connecting shaft (3) and a limit block (8), wherein the length of the spacer sleeve (2) matches the distance between the two wheel fork holes (11); One end of the support shaft (1) can be inserted into the cylinder (12) and fixed by a stop block (8); The connecting shaft (3) passes through the spacer (2) along the length direction, and the two ends of the connecting shaft (3) can be detachably fixedly connected to the two wheel fork holes (11) respectively; The support shaft (1) is provided with a slidingly connected adjustment block (4), the upper surface of the adjustment block (4) abutting against the side wall of the spacer sleeve (2).
2. The landing gear parts heat treatment deformation control device according to claim 1, characterized in that: The support shaft (1) comprises a small diameter section (101) and a large diameter section (102) connected to each other, and the small diameter section (101) can be sleeved in the cylinder (12); the limit block (8) is arranged at the connection between the small diameter section (101) and the large diameter section (102), and the inner and outer side surfaces of the limit block (8) can respectively abut against the outer wall surface of the small diameter section (101) and the inner wall surface of the wheel fork (13).
3. The landing gear parts heat treatment deformation control device according to claim 2, characterized in that: The large diameter section (102) is provided with a groove (103), the adjustment block (4) and the groove (103) are detachably fixedly connected via a second fastener (10), and a U-shaped groove (401) is provided at the connection between the adjustment block (4) and the second fastener (10).
4. The landing gear parts heat treatment deformation control device according to claim 3, characterized in that: The adjustment block (4) comprises a vertical block (402) and a horizontal block (403) which are vertically connected, and the horizontal block (403) is arranged upward; the vertical block (402) is connected to the groove (103), and the U-shaped groove (401) is arranged on the vertical block (402).
5. The landing gear parts heat treatment deformation control device according to claim 1, characterized in that: Both ends of the connecting shaft (3) are sleeved with bushings (5), the bushings (5) and the connecting shaft (3) are detachably fixedly connected via a first fastener (6), and the bushings (5) are used to abut against the outer wall surface of the wheel fork hole (11).
6. The landing gear parts heat treatment deformation control device according to claim 1, characterized in that: Limiting pieces (7) are provided on the inner sides of both ends of the spacer (2); the connecting shaft (3) passes through the inner hole of the limiting piece (7), and the diameter of the inner hole matches the outer diameter of the connecting shaft (3).
7. The landing gear parts heat treatment deformation control device according to any one of claims 1 to 6, characterized in that: The spacer sleeve (2) is provided with a plurality of first oil holes (201), and the plurality of first oil holes (201) are all connected to the inner cavity of the spacer sleeve (2); the support shaft (1) is provided with a through hole (105) extending along the length direction, and the side wall of the support shaft (1) is provided with a plurality of second oil holes (104), and the plurality of second oil holes (104) are all connected to the through hole (105).
8. The landing gear parts heat treatment deformation control device according to any one of claims 1 to 6, characterized in that: The outer end of the support shaft (1) is provided with a base (9).
9. A heat treatment system, comprising a heat treatment furnace (14) and a landing gear part arranged in the heat treatment furnace (14), the landing gear part comprising a cylinder (12) and a wheel fork (13) connected to the cylinder (12), and wheel fork holes (11) are provided on both ends of the opening side of the wheel fork (13); characterized in that: It also includes a landing gear part heat treatment deformation control device as described in any one of claims 1 to 8; one end of the support shaft (1) is fixedly arranged in the cylinder (12), the spacer (2) is arranged between the two wheel fork holes (11) and fixed by the connecting shaft (3), and the position of the adjustment block (4) is adjusted so that the upper surface of the adjustment block (4) abuts against the side wall of the spacer (2).
10. The heat treatment system according to claim 9, characterized in that: The axis of the support shaft (1) is colinear with the axis of the cylinder (12).