A rolling bending method for correcting the shape of plate frame after quenching

Abstract

The present invention discloses a rolling bending method for correcting the shape of a plate frame after quenching, comprising the following steps: S1, adjusting the position of a main roller so that the center of the main roller is offset downward by a distance h1 relative to the center of a first driven wheel group and a second driven wheel group, adjusting the positions of the first driven wheel group and the second driven wheel group so that the curvature radius of the plate frame after rolling is slightly smaller than a theoretical value, without changing the direction of the plate frame, and feeding the plate frames one by one into a rolling bed for a first rolling bending correction; S2, adjusting the height position of the main roller so that its center is offset upward by a distance h2 relative to the center of the first driven wheel group and the second driven wheel group, adjusting the positions of the first driven wheel group and the second driven wheel group so that the curvature radius of the plate frame after rolling is slightly larger than a theoretical value, without changing the direction of the plate frame, and feeding the plate frames one by one into a rolling bed for a second rolling bending correction. The present invention reduces the workload of subsequent manual finishing, improves efficiency, and saves costs.

Description

Technical Field

[0001] The invention belongs to the technical field of sheet metal shape correction, and relates to a rolling method for correcting the shape of a sheet metal frame after quenching. Background Art

[0002] Sheet metal frames are thin-walled, weakly rigid structural components commonly used in aerospace applications. They are typically made from annealed, reinforced aluminum alloy sheets. Quenching and artificial aging are incorporated into the process to increase strength and dimensional stability. Nitrate tanks are relatively large heat treatment equipment suitable for heating aerospace sheet metal frames during the quenching process. The quenching cooling medium is typically water. Due to the large size of sheet metal frames, it is not possible to fully immerse them in water simultaneously, which can easily lead to extremely uneven internal stress and severe warping after quenching.

[0003] Rolling and shaping is a relatively effective shaping method that can level parts on a larger scale and reduce the subsequent manual finishing workload. The traditional rolling and shaping method is: adjust the height position of the driving wheel and the driven wheel to an average position, that is, the center height of each roller is consistent, adjust the downward pressure of the driven wheel multiple times, and repeat the rolling and bending multiple times. After shaping, the radius of some parts is appropriate, the radius of some parts is too small, and the radius of some parts is too large. For parts with small radius, a hammer is used to place the edge to reach the target radius. For parts with large radius, a hammer is needed to be used to shape each small section multiple times. Since it is much more difficult to adjust the radius of parts with large radius to the appropriate level than to place parts with small radius to the appropriate level, and too much time is consumed during rolling and bending, the entire shaping process takes a long time, and the subsequent manual finishing workload is relatively large. Summary of the Invention

[0004] In order to effectively solve the problems existing in the prior art, the purpose of the present invention is to provide a rolling bending method for correcting the shape of a plate frame after quenching.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A rolling bending method for correcting the shape of a plate frame after quenching, comprising the following steps:

[0007] S1, adjust the position of the main roller so that the center of the main roller is offset downward by a distance h1 relative to the center of the first driven wheel group and the second driven wheel group. Adjust the positions of the first driven wheel group and the second driven wheel group so that the curvature radius of the sheet frame after rolling is slightly smaller than the theoretical value. Without changing the direction of the sheet frame, feed the sheet frame one by one into the roller bed for the first rolling and shaping.

[0008] S2, adjust the height position of the main roller so that its center is offset upward by a distance h2 relative to the center of the first driven wheel group and the second driven wheel group. Adjust the positions of the first driven wheel group and the second driven wheel group so that the curvature radius of the sheet frame after rolling is slightly larger than the theoretical value. Without changing the direction of the sheet frame, feed the sheet frame one by one into the roller bed for the second rolling and shaping.

[0009] S3, adjust the height position of the main roller to return it to the normal height, adjust the position of the first driven wheel group and the second driven wheel group, so that the curvature radius of the plate frame after rolling is slightly smaller than the theoretical value, without changing the direction of the plate frame, and send the plate frames one by one into the roller bed for the third rolling and shaping.

[0010] As a preferred method, in step S1, the warping direction of the plate frame is first observed on the platform, and the plate frame that is warped outward is turned over from top to bottom to become warped inward.

[0011] As a preferred embodiment, the offset distances h1 and h2 are set according to the degree of deformation of the part after quenching, and h2 is smaller than h1.

[0012] The present invention has the following advantages:

[0013] The present invention provides a rolling bending method for correcting the shape of a sheet metal frame after quenching. By changing the position of the main roller three times, the bending direction of the web plane is forcibly altered, thereby gradually changing its internal stress state and reducing uneven stress distribution. This method can relatively quickly correct the web flatness over a large range. By changing the feed position of the driven roller three times, the final curvature radius of the sheet metal frame component is slightly smaller than the theoretical value, making it easier to trim to the theoretical radius by placing the edge, reducing the workload of subsequent manual trimming, improving efficiency, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a flow chart of the present invention;

[0015] Figure 2 It is a top view of the rolling and shaping process;

[0016] Among them, 1 is the first driven wheel group, 2 is the main roller, 3 is the second driven wheel group, and 4 is the plate frame. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings.

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Example:

[0020] A rolling bending method for correcting the shape of a plate frame after quenching, comprising the following steps:

[0021] S1, observe the warping direction of the sheet frame 4 on the platform and classify it into: roughly divided into inward warping (convex in the middle) and outward warping (concave in the middle), and turn the outward warping sheet frame upside down to uniformly change it to inward warping;

[0022] S2, adjust the position of the main roller 2 so that the center of the main roller 2 is offset downward by a distance h1 relative to the centers of the first driven wheel group 1 and the second driven wheel group 3, while the heights of the first driven wheel group 1 and the second driven wheel group 3 remain unchanged and flush;

[0023] S3, adjusting the positions of the first driven wheel assembly 1 and the second driven wheel assembly 3 so that the curvature radius of the plate frame 4 after rolling is slightly smaller than the theoretical value;

[0024] S4, without changing the direction of the inward-warped sheet frame 4, the sheet frames 4 are fed into the rolling bed one by one for the first rolling and bending correction;

[0025] S5, adjusting the height of the main roller 2 so that its center is offset upward by a distance h2 from the symmetry center;

[0026] S6, adjusting the positions of the first driven wheel assembly 1 and the second driven wheel assembly 3 so that the curvature radius of the plate frame 4 after rolling is slightly larger than the theoretical value;

[0027] S7, without changing the direction of the plate frame 4, the plate frames 4 are fed into the rolling bed one by one for a second rolling and bending correction;

[0028] S8, adjust the height position of the main roller 2 to return it to a normal height;

[0029] Specifically, the normal height is the height at which the center of the main roller 2 and the symmetric centers of the first driven wheel group 1 and the second driven wheel group 3 are consistent.

[0030] S9, adjusting the positions of the first driven wheel assembly 1 and the second driven wheel assembly 3 so that the curvature radius of the plate frame 4 after rolling is slightly smaller than the theoretical value;

[0031] S10, without changing the direction of the plate frame 4, the plate frames 4 are fed into the rolling bed one by one to perform the third rolling and bending correction.

[0032] like Figure 2 As shown, by adjusting the positions of the first driven wheel group 1 and the second driven wheel group 3 in the front-back or left-right direction, the radius of the sheet frame 4 after rolling can be changed, and by adjusting the position of the main roller 2 up and down, the bending direction and flatness of the web of the sheet frame 4 can be changed.

[0033] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A rolling method for correcting the shape of a plate frame after quenching, characterized in that: The steps include: S1: First, observe the warping direction of the sheet frame on the platform, flip the upper and lower surfaces of the outward-warped sheet frame to make it warped inward; adjust the position of the main roller so that the center of the main roller is offset downward by a distance h1 relative to the center of the first driven wheel group and the second driven wheel group, and adjust the position of the first driven wheel group and the second driven wheel group so that the curvature radius of the sheet frame after rolling is slightly smaller than the theoretical value. Without changing the direction of the sheet frame, the sheet frame is fed into the roller bed one by one for the first rolling and shaping correction; S2: Adjust the height of the main roller so that its center is offset upward by a distance h2 relative to the centers of the first and second driven wheel groups. Adjust the positions of the first and second driven wheel groups so that the curvature radius of the sheet frame after rolling is slightly larger than the theoretical value. Without changing the direction of the sheet frame, feed the sheet frame one by one onto the roller bed for the second rolling and shaping. The offset distances h1 and h2 are set according to the degree of deformation of the sheet frame after quenching, with h2 being smaller than h1. S3, adjust the height position of the main roller to return it to the normal height, adjust the position of the first driven wheel group and the second driven wheel group, so that the curvature radius of the plate frame after rolling is slightly smaller than the theoretical value, without changing the direction of the plate frame, and send the plate frames one by one into the roller bed for the third rolling and shaping.

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