阅读说明：本技术 一种用于航空膜盘薄壁复杂表面喷丸方法 (Shot blasting method for thin-wall complex surface of aviation membrane disc ) 是由 王延忠 苏国营 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种用于航空膜盘薄壁复杂表面丸方法,其步骤为：步骤一、采集加工后的膜盘三位形貌；步骤二、获取特征点的法向矢量；步骤三、将矢量参数转化为喷头位点控制方程,生成位置坐标；步骤四、将喷头位置坐标导入数控喷丸机；步骤五、在喷头上安装自制滤丸器；步骤六、通过激光准直器,调整两侧喷头的对中性；步骤六、设定双喷头的喷丸路径；步骤七、给膜盘有一定旋转速度；步骤八、开始喷丸。该喷丸方法可实现双面同步喷丸,减小变形；相对于传统大面积概率性喷丸,可实现定点精细喷丸；相对于传统斜向角度喷丸,该技术可实现法向瞬时喷丸。(The invention discloses a method for preparing an aviation membrane disc thin-wall complex surface pill, which comprises the following steps: step one, collecting the three-dimensional shape of a processed membrane disc; step two, acquiring a normal vector of the feature point; converting the vector parameters into a nozzle site control equation to generate position coordinates; guiding the position coordinates of the spray head into the numerical control shot blasting machine; step five, installing a self-made pill filter on the spray head; sixthly, adjusting the centering of the spray heads on the two sides through a laser collimator; setting a shot blasting path of the double spray heads; seventhly, the film feeding disc has a certain rotating speed; and step eight, starting shot blasting. The shot blasting method can realize double-sided synchronous shot blasting and reduce deformation; compared with the traditional large-area probabilistic shot blasting, the method can realize fixed-point fine shot blasting; compared with the traditional oblique angle shot blasting, the technology can realize normal instantaneous shot blasting.)

1. A shot blasting method for a thin-wall complex surface of an aviation membrane disc is characterized by comprising the following steps:

the method comprises the following steps of firstly, accurately acquiring three-dimensional shape information of the surface of an aviation membrane disc by using a laser confocal scanning microscope;

importing the film disc morphology point cloud into MATLAB software, and acquiring components of a characteristic point method in three-dimensional space XYZ directions by adopting a SURFNORM command;

step three, establishing a shot blasting site normal shot blasting control equation according to the selected shot blasting machine structural layout, calculating position coordinates and generating corresponding numerical control codes;

step four, importing the shot blasting site control code into a numerical control shot blasting machine;

fifthly, installing a self-made shot filtering machine on the double spray heads to realize accurate shot blasting;

sixthly, centering adjustment and locking are carried out on the double spray heads through a laser collimator, and double-sided synchronous shot blasting is achieved;

step seven, setting a shot blasting path of the double-nozzle by giving Y, Z coordinate values;

step eight, rotating the membrane disc at a low speed through a tool;

and step nine, starting a program and starting shot blasting.

2. The method of claim 1, wherein the three-dimensional topographical information is denoised by using a k-d tree for chaotic point cloud.

3. The method of claim 1, wherein the origin of the topographical points is an initial origin of the film disk.

4. The method of claim 1, wherein the position coordinates are obtained by solving a transformation matrix of machine tool coordinates and film disc tooling coordinates.

5. The method of claim 1 wherein the pellet filter is used to collect the pellet bundles and screen out pellets that have been skewed.

6. The method of claim 1 wherein said microtpeed is used to impart a tangential velocity to the pellets contacting the membrane disc to prevent interference with the pellets being worked.

Technical Field

The invention belongs to the technical field of aviation membrane disc surface strengthening, and particularly relates to a shot blasting method for a thin-wall complex surface of an aviation membrane disc.

Background

The aviation membrane disc coupling is a novel coupling which is developed in the world in recent years. Compared with the old coupler, the high-speed high-load coupling has high working reliability, can absorb larger misalignment of the axis, has no noise, does not need lubrication, does not need maintenance, has wide application range, and is particularly suitable for high-speed and heavy-load aviation power devices. The aviation membrane disc is used as a key part of an aviation membrane disc coupler, and the profile of the aviation membrane disc coupler is a hyperbolic radials. The thinnest thickness is only about 0.3 mm-1.0 mm, the rigidity is extremely small, the deformation is easy to occur in the surface strengthening process, and the method is always a bottleneck technology in the aerospace equipment manufacturing. The manufacturing method widely applied in China at present is to reduce the deformation of the surface of the aviation membrane disk in the process of shot peening strengthening by attaching a manufacturing mould to the aviation membrane disk as a support.

The invention is reformed on a common numerical control shot blasting machine, realizes synchronous and accurate normal instantaneous shot blasting of two surfaces of a membrane disc by adopting a double-nozzle mode and adding a self-made filter, has low cost, high efficiency and small deformation, and meets the requirement of aeronautical manufacturing.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the method can realize synchronous and accurate normal instantaneous shot blasting on the two surfaces of the membrane disc, has low cost, high efficiency and small deformation, and meets the requirements of aviation manufacturing.

The technical scheme adopted by the invention is as follows: a shot blasting method for a thin-wall complex surface of an aviation membrane disc is shown in figure 1 and is characterized by comprising the following steps:

the method comprises the following steps of firstly, accurately acquiring three-dimensional shape information of the surface of an aviation membrane disc by using a laser confocal scanning microscope;

importing the film disc morphology point cloud into MATLAB software, and acquiring components of a characteristic point method in three-dimensional space XYZ directions by adopting a SURFNORM command;

step three, establishing a shot blasting site normal shot blasting control equation according to the selected shot blasting machine structural layout, calculating position coordinates and generating corresponding numerical control codes;

step four, importing the shot blasting site control code into a numerical control shot blasting machine;

fifthly, installing a self-made shot filtering machine on the double spray heads to realize accurate shot blasting, as shown in figure 2;

sixthly, centering adjustment and locking are carried out on the double spray heads through a laser collimator, and double-sided synchronous shot blasting is achieved;

step seven, setting a shot blasting path of the double-nozzle by giving Y, Z coordinate values;

step eight, rotating the membrane disc at a low speed through a tool;

and step nine, starting a program and starting shot blasting.

The three-dimensional morphology information needs to be denoised by using a k-d tree;

the original point of the appearance point is the initial original point of the membrane disc;

the position coordinates are obtained by solving a conversion matrix of machine tool coordinates and film disc tool coordinates;

the pill filtering machine is used for collecting pill bundles and screening out pills with large deviation angles;

the said micro-speed is used to impart a tangential velocity to the pellets contacting the membrane disc, preventing interference with the pellets coming into action.

Compared with the prior art, the invention has the advantages that:

1. compared with a single shot blasting method, the shot blasting can be synchronously performed on two surfaces, so that the part deformation is prevented, and the efficiency is high;

2. compared with the traditional probability shot blasting method, the method can realize accurate shot blasting, has good integral strengthening quality and has no dead angle;

3. compared with an inclined angle shot blasting method, the directional shot blasting strengthening quality is high, and the surface integrity is excellent;

4. aiming at thin-wall parts, an instantaneous shot blasting method is adopted, so that overlarge deformation is avoided, and the profile precision is protected.

Drawings

FIG. 1 is a flow chart of the shot blasting technique of the present invention;

FIG. 2 shows a shot filter 1, a shot blasting port 2, a baffle 3, a filter port 4, a shot blasting nozzle matrix 5 and a host interface.

Detailed Description

For the purpose of clearly illustrating the technical features of the present solution, the present solution is explained below by a specific embodiment, and with reference to the attached drawings, as shown in fig. 1.

The method comprises the following steps of firstly, accurately acquiring three-dimensional shape information of the surface of an aviation membrane disc by using a laser confocal scanning microscope;

importing the film disc morphology point cloud into MATLAB software, and acquiring components of a characteristic point method in three-dimensional space XYZ directions by adopting a SURFNORM command;

step three, establishing a shot blasting site normal shot blasting control equation according to the selected shot blasting machine structural layout, calculating position coordinates and generating corresponding numerical control codes;

step four, importing the shot blasting site control code into a numerical control shot blasting machine;

fifthly, installing a self-made shot filtering machine on the double spray heads to realize accurate shot blasting, as shown in figure 2;

sixthly, centering adjustment and locking are carried out on the double spray heads through a laser collimator, and double-sided synchronous shot blasting is achieved;

step seven, setting a shot blasting path of the double-nozzle by giving Y, Z coordinate values;

step eight, rotating the membrane disc at a low speed through a tool;

and step nine, starting a program and starting shot blasting.

The three-dimensional morphology information needs to be denoised by using a k-d tree;

the original point of the appearance point is the initial original point of the membrane disc;

the position coordinates are obtained by solving a conversion matrix of machine tool coordinates and film disc tool coordinates;

the pill filtering machine is used for collecting pill bundles and screening out pills with large deviation angles;

the said micro-speed is used to impart a tangential velocity to the pellets contacting the membrane disc, preventing interference with the pellets coming into action.

The present invention is not limited to the above-described embodiments, and variations, modifications, additions and substitutions which are within the spirit of the invention and the scope of the invention may be made by those of ordinary skill in the art are also within the scope of the invention.