A stability control method for coupled machining of aluminum alloy thin-walled components
A technology of stability control, thin-walled components, applied in the direction of process efficiency improvement, instrumentation, design optimization/simulation, etc., can solve problems such as surface machining vibration, and achieve the effect of large material removal efficiency
Active Publication Date: 2022-05-17
NANCHANG HANGKONG UNIVERSITY
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[0004] In order to solve the problem of surface processing vibration in the process of laser additive manufacturing and high-speed milling coupling of aluminum alloy thin-walled components, the present invention provides a method for controlling the stability of aluminum alloy thin-walled components coupled processing, and a method for calculating milling stability by integrating Cotes values It is applied to solve the coupling process of laser additive manufacturing and high-speed milling of aluminum alloy thin-walled components, to obtain the optimal combination of cutting amount under the condition of no chatter to ensure the stability of the milling process of the metal sheet surface, to solve the problem of surface processing vibration, and finally Accurate and rapid prototyping of complex aluminum alloy thin-walled components
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[0088] The present invention will be further described below in conjunction with drawings and embodiments. see Figure 1 to Figure 5 , a method for controlling the stability of coupled machining of aluminum alloy thin-walled components, the steps of which are as follows:
[0089] Step 1: first use the powder spreading device to evenly spread the aluminum alloy powder 1 on the workbench 3 through the roller 2, the workbench 3 and the lifting platform 4 can be moved up and down in linkage, and the thickness of the powder spread is controlled to be equal to the process design layer thickness (such as figure 1 shown);
[0090] Step 2: The lifting platform 4 drives the workbench 3 to descend, the roller 2 returns, the workbench 3 rises to the powder-spreading height, and the laser beam is generated by the laser 5 to carry out laser sintering on the selected area of the metal powder to obtain the metal sheet 6 (such as figure 2 shown);
[0091] Step 3: According to the "powder...
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The invention discloses a stability control method for coupled processing of aluminum alloy thin-walled components. Aluminum alloy powder is spread on a workbench, and a laser is used to sinter a selected area; according to the "powder spreading-sintering" link, the cycle is ten times; the use is limited The meta-method obtains the dynamic parameters of the sintered metal sheet and the machine tool system; establishes the milling dynamics differential equation in the state space form considering the regenerative effect, and the continuous time in a cycle t Expressed as discrete time nodes, the state transition matrix of two adjacent cutting cycles is finally established to judge the system stability. Through theoretical calculation, the critical axial depth of cut for machining instability during milling is obtained, and the two-dimensional stability limit diagram for the spindle speed and axial depth of cut is calculated. When milling the sintered metal sheet, it is integrated according to the Cotes numerical value. The optimal chatter-free cutting parameters calculated by the method are used to set the cutting parameters to achieve stable cutting and achieve maximum material removal efficiency.
Description
technical field [0001] The invention relates to the surface processing technology of thin-walled components, in particular to a method for controlling the stability of laser additive manufacturing-precision milling coupled processing of aluminum alloy thin-walled components. Background technique [0002] Aluminum alloys are widely used in aerospace manufacturing due to their good material mechanical properties, and the preparation of aluminum alloy thin-walled components with complex shapes is a hot and difficult point in the field of advanced manufacturing technology. Machining is a method of removing excess material from a blank to form a final part, including turning, milling, drilling, planing, grinding, etc. Traditional subtractive manufacturing represented by milling has low material utilization rate and low processing efficiency; the principle of additive manufacturing is to form parts through continuous superimposition of materials, and pure additive manufacturing is...
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IPC IPC(8): G06F30/17G06F30/20G06F30/23G06F119/14G06F119/18
CPCG06F30/17G06F30/20G06F30/23G06F2119/14G06F2119/18Y02P10/25
Inventor 秦国华娄维达王华敏侯源君孙士平
Owner NANCHANG HANGKONG UNIVERSITY