Floating clamping adaptive processing method and process equipment

A processing method and self-adaptive technology, applied in metal processing equipment, metal processing machinery parts, clamping, etc., can solve problems such as low production efficiency, cumbersome processing technology, and low processing accuracy of parts

Active Publication Date: 2015-12-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low machining accuracy, reduced lifespan, low production efficiency and cumbersome processing technology caused by part processing deformation due to the release of residual stress of parts, and to invent a method that can automatically process parts according to the deformation of parts. Adaptive adjustment to release residual stress and reduce deformation of floating clamping adaptive processing method and process equipment

Method used

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  • Floating clamping adaptive processing method and process equipment
  • Floating clamping adaptive processing method and process equipment
  • Floating clamping adaptive processing method and process equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Such as figure 1 shown.

[0072] A floating clamping adaptive processing method, which includes the following steps:

[0073] Step 1, according to the shape of the part, such as figure 1 The part Ⅴ shown in the figure is to fix the machining coordinate system unchanged, and reasonably arrange the positions of the fixed clamping points. Generally, the edge of the center position of the part or the position with a small deformation amount is selected; figure 1 For the part Ⅴ shown, select the center position as the fixed clamping point, such as figure 1 I shown;

[0074] Step 2, design the position of the mobile clamping point of the part, and process the process table, such as figure 1 As shown, the deformation on both sides of the part deformation is relatively large, so the two sides are selected as the moving clamping point as shown in figure 1 As shown in Ⅲ;

[0075] Step 3, according to the height of the process table, select a suitable installation base, fix ...

Embodiment approach

[0082] 1. Adaptive clamping platform.

[0083] Such as figure 2 , 3 , 4, and 10, the implementation of the self-adaptive clamping platform is:

[0084] The middle edge of the part is a fixed clamping position, and 5 adaptive clamping platforms are fixed on each side. The adaptive clamping platform is connected to the workbench through the installation base 1.C, and is connected by screws; the installation base 1.C is connected by screws. Connect with the movement mechanism; after the self-adaptive clamping platform is installed, adjust the position of the lifting column 1.26 through the air / liquid device, so that the process table is in contact with the device. The cavity 41.33 is fed with high-pressure gas / liquid, and the pressure difference generated by the cavity 41.33 and the cavity 21.20 generates a pulling force on the piston rod 1.29, and generates a clamping force on the parts through the U-shaped guide rail 1.4. After all clamps, record the initial value of each f...

Embodiment 3

[0098] The control system framework and flow chart of the floating clamping adaptive processing method of the present invention are as follows Figure 15 As shown, it includes the following steps:

[0099] Step 1, the overall control module sets the working position H of the clamping point 0 , to ensure that after the part is clamped, the clamping point has a movable margin in all directions. For example, the maximum height displacement of the clamping point movement is H m , then H 0 Usually set to H m / 2 can also be determined empirically. The single control module adjusts the clamping point to the specified position after receiving the command, and then completes the clamping of the parts;

[0100] Step 2, after the clamping is completed, read the initial measurement value F of the force sensor 0 . Judging whether the spindle of the machine tool starts to rotate, if the spindle rotates, the overall control module sends a command to the individual control module to en...

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PUM

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Abstract

The invention discloses a low-stress self-adaptive machining method and process equipment. According to the method, the clamping state of a part is automatically adjusted according to deformation caused by release of residual stress after a certain material of the part is removed, the part can release deformation fully in the machining process, and deformation is small after the part is unloaded. To realize the machining method, the invention provides self-adaptive clamping and monitoring equipment. The equipment adjusts the space position of a clamping point in a self-adaptive mode according to deformation of the part on the premise of ensuring clamping force of a certain degree, and stress and a displacement value of the clamping point are monitored through a force sensor and a displacement sensor. It is ensured that deformation of the part is small after clamping is removed, the out-of-tolerance and scrap problems caused by deformation of the machined part are solved, and the automation and intelligent of clamping are achieved.

Description

technical field [0001] The invention relates to a floating clamping adaptive processing method and process equipment, in particular to a floating clamping adaptive processing method and process equipment for releasing residual stress during processing to reduce part deformation. Background technique [0002] For large aviation parts, such as frame beam rib parts in aircraft structural parts, due to their complex structure, large size and high material removal rate, the residual stress of the parts is continuously released during the processing process, and the parts are fixed at this time. The parts processed in this state will be greatly deformed after the processing is completed and the clamping is removed. After the deformation, it is necessary to re-repair the datum, re-clamp processing and other processes, which makes the processing of the parts time-consuming, laborious and expensive. The processing accuracy is not high, and even the parts are out of tolerance and scra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q3/00B23Q17/00
CPCB23Q3/00B23Q17/00
Inventor 李迎光郝小忠刘长青赵智伟陈耿祥牟文平赵雪冬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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