Blade preparation method based on array measurement and array grinding and polishing

Abstract

The invention provides a blade preparation method based on array measurement and array grinding and polishing, and relates to the technical field of aero-engines. The method specifically comprises the steps that a blade production line based on array measurement and array grinding and polishing is built and comprises a part waiting area, line laser array measurement equipment, a transfer area, array grinding and polishing equipment, a machining completion area, a production line guide rail and a robot; a preset number of rolling blade blanks are clamped through a rapid tool and a tray; and the tray containing the rolled blade blank is fed into a rolled blade production line based on array measurement and array grinding and polishing to be machined, and the blade is manufactured. By means of the process scheme based on array measurement and array grinding and polishing, batch rapid precision machining of the stator blades of the gas compressor can be achieved, the machining quality and efficiency are improved, and the part out-of-tolerance scrap number caused by blank factors is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aeroengines, and in particular to a blade preparation method based on array measurement and array grinding and polishing. Background Art

[0002] The stator blades of the compressor of an aircraft engine, hereinafter referred to as "rolled blades", play a rectifying role and play an important role in the aerodynamic performance and compression efficiency of the engine. The requirements for the dimensional accuracy and surface quality of rolled blades are very high, which are difficult to achieve with traditional process methods. Therefore, the array grinding and polishing process is being gradually adopted to accurately process multiple blades at the same time according to the theoretical points to ensure the relevant requirements. In the past, the array grinding and polishing process first formed the blade blank by the rolling process, and then the array grinding and polishing equipment was used to accurately process 8 blades at the same time. Since the blade blank is roll-formed, the blade profile may be misaligned relative to the reference position after rolling, and the margins between the blades are uneven, resulting in inconsistent array grinding and polishing processing quality. Therefore, the array grinding and polishing process requires that the margin distribution of multiple blades processed at the same time should not differ by more than 0.1-0.2mm, so it is necessary to quickly batch test the blanks after rolling, and group the blades according to the processing margin to ensure that the blade margin distribution of the array grinding and polishing is uniform. At present, array grinding and polishing technology has been gradually applied in the field of compressor stator blade processing. However, the array grinding and polishing process method has high requirements on the consistency of blade blank size, so the blade blank needs to be measured quickly and accurately before processing. However, there is currently no relevant process method that can realize a process route that combines rapid batch detection, margin grouping, and array grinding and polishing. The process method currently used is to use a three-coordinate measuring machine to measure each piece, then manually group the blades, and then process them by array grinding and polishing. The measurement capability of this processing method cannot guarantee the production capacity of the array grinding and polishing equipment, which makes it difficult to further improve the processing efficiency and production capacity of the array grinding and polishing process. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention utilizes a combination of array measurement technology and array grinding and polishing technology to propose a blade preparation method based on array measurement and array grinding and polishing, aiming to achieve efficient and high-quality processing of blades.

[0004] The present invention proposes a blade preparation method based on array measurement and array grinding and polishing, the method comprising the following steps:

[0005] Step 1: Build a blade production line based on array measurement and array grinding and polishing;

[0006] Step 2: Clamp a preset number of rolled blade blanks using a quick-change fixture and a pallet;

[0007] Step 3: sending the tray with the rolled blade blank into a blade production line based on array measurement and array grinding and polishing for processing to obtain a processed blade;

[0008] The blade production line based on array measurement and array grinding and polishing described in step 1 comprises: a parts waiting area, a line laser array measurement device, a transfer area, an array grinding and polishing device, a processing completion area, a production line guide rail, and a robot; wherein the parts waiting area, the line laser array measurement device, the transfer area, the array grinding and polishing device, and the processing completion area are arranged in sequence on the same side of the production line guide rail; the robot comprises a robotic arm and a slide; wherein the slide is mounted on the production line guide rail, and the robotic arm is mounted on the slide;

[0009] The clamping method of the rolled blade blank in step 2 is: installing the rolled blade blank on the main body of the quick-change fixture, and placing the quick-change fixture with the rolled blade blank on the pallet, wherein the lower interface of the quick-change fixture matches the pallet, and the number of clamping the rolled blade blank is determined according to the number of interfaces on the pallet that match the quick-change fixture;

[0010] The step 3 further comprises:

[0011] Step 3.1: Place the tray with the rolled blade blank into the parts waiting area;

[0012] Step 3.2: When the robot receives the device idle signal sent by the line laser array measuring device, the robot grabs the quick-change tooling on the tray in the parts waiting area, and transfers the quick-change tooling together with the rolled blade blank clamped on the quick-change tooling to the line laser array measuring device. After the preset number of quick-change tooling is transferred, the robot stops moving.

[0013] Step 3.3: The line laser array measuring device converts the device idle signal into a measuring signal, and executes the set blade measurement program to obtain the machining allowances of all rolled blade blanks;

[0014] Step 3.4: Divide the rolled blade blanks into several groups according to the machining allowances of all rolled blade blanks to obtain blade grouping information. After the grouping is completed, the line laser array measurement device sends a measurement completion signal and blade grouping information to the robot;

[0015] Step 3.5: The robot transfers the rolled blade blanks to the transfer area according to the received blade grouping information. The transferred rolled blade blanks are grouped according to the blade grouping information. When all rolled blade blanks are transferred from the line laser array measuring device to the transfer area, the line laser array measuring device sends an equipment idle signal and executes step 3.2;

[0016] Step 3.6: When the robot receives the equipment idle signal sent by the array grinding and polishing equipment, the robot grabs the quick-change fixture of the same group clamping the roll-rolled blade blank in the transfer area, and installs the quick-change fixture on the array grinding and polishing equipment. After all the quick-change fixtures of the same group are transferred, the robot stops moving;

[0017] Step 3.7: The robot sends the blade grouping information of the quick-change tooling on the array grinding and polishing device to the array grinding and polishing device. The array grinding and polishing device converts the device idle signal into a processing signal, and selects the array grinding and polishing program matching the group of rolled blade blanks according to the blade grouping information and performs array grinding and polishing processing to obtain processed blades. After the processing is completed, the array grinding and polishing device sends a processing completion signal to the robot;

[0018] Step 3.8: After receiving the processing completion signal, the robot removes the quick-change tooling on the array grinding and polishing equipment and places it in the processing completion area. When all the quick-change tooling on the array grinding and polishing equipment are removed, the array grinding and polishing equipment sends an equipment idle signal and executes step 3.6;

[0019] Step 3.9: Remove the blades from all quick-change tooling in the processing completion area to complete the preparation of the blades.

[0020] The beneficial effects of adopting the above technical solution are:

[0021] The method of the present invention proposes an efficient and high-quality processing technology method for aircraft engine compressor stator blades. The method can realize rapid batch array measurement of blades through line laser array measurement equipment to ensure measurement accuracy and speed; and is integrated with array grinding and polishing equipment on the same production line, that is, a production line for blade array processing is built, thereby realizing rapid measurement and processing of blades and greatly improving processing quality and efficiency.

[0022] The method of the present invention proposes a new blade processing scheme, namely a process scheme based on batch array measurement and array grinding and polishing, which can realize batch rapid precision processing of aircraft engine compressor stator blades, improve processing quality and efficiency, reduce the number of parts scrapped due to out-of-tolerance caused by rough material factors, and save costs.

[0023] In summary, the process scheme designed by the method of the present invention can realize the process route of batch array measurement, automatic grouping, and array grinding and polishing, shorten the measurement time, speed up the blade production cycle, improve the blade processing quality and production efficiency, and at the same time can realize automatic analysis of processing allowances and grouping, shorten equipment waiting time, and improve equipment production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a flow chart of a blade preparation method based on array measurement and array grinding and polishing in this embodiment;

[0025] Figure 2 Schematic diagram of the layout of a blade production line based on array measurement and array grinding and polishing in this embodiment;

[0026] Figure 3 This is a schematic diagram of the structure of the blade and the quick-change tooling in this embodiment;

[0027] In the figure: 1- rolled blade blank; 2- main body of the quick-change fixture; 3- lower interface of the quick-change fixture; 4- side structure of the quick-change fixture. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood.

[0029] The key point of this implementation method is the process scheme that combines blade array measurement with array grinding and polishing, and builds a blade array processing production line based on this.

[0030] A blade preparation method based on array measurement and array polishing in this embodiment, such as Figure 1 As shown, the method comprises the following steps:

[0031] Step 1: Build a blade production line based on array measurement and array grinding and polishing.

[0032] The blade production line based on array measurement and array grinding and polishing comprises: a parts waiting area, a line laser array measuring device, a transfer area, an array grinding and polishing device, a processing completion area, a production line guide rail and a robot; wherein the parts waiting area, the line laser array measuring device, the transfer area, the array grinding and polishing device and the processing completion area are arranged in sequence on the same side of the production line guide rail in the production sequence; the robot comprises a robotic arm and a slide; wherein the slide is installed on the production line guide rail, and the robotic arm is installed on the slide.

[0033] In this embodiment, if Figure 2 As shown, they are, in order, parts waiting area, line laser array measuring equipment, transfer area, array grinding and polishing equipment, and processing completion area. Robots are used to automatically transport and install parts between each area.

[0034] Step 2: Use quick-change fixtures and pallets to clamp a preset number of rolled blade blanks.

[0035] The clamping method of the rolled blade blank is as follows: the rolled blade blank is mounted on the main body of the quick-change fixture, and the quick-change fixture with the rolled blade blank is placed on a pallet, wherein the lower interface of the quick-change fixture matches the pallet, and the clamping quantity of the rolled blade blank is determined according to the number of interfaces on the pallet that match the quick-change fixture.

[0036] In this embodiment, the quick-change fixture is usually located between the end of the robot and the gripper to achieve quick replacement of different grippers. This design allows the robot to quickly switch between different tasks, improving work efficiency and flexibility. The blade is mounted on the quick-change fixture, such as Figure 3 As shown, the rolled blade blank 1 is installed on the main body 2 of the quick-change fixture, and then the quick-change fixture is placed on the pallet. The lower interface 3 of the quick-change fixture matches the pallet. After each pallet is fully installed with blades, the pallet is placed in the waiting area. The number of blades installed on each pallet should be an integer multiple of 8, preferably 40. The lower interface 3 of the quick-change fixture matches the installation interface of the pallet, the line laser array measuring device, and the array grinding and polishing device. The blades are always installed on the quick-change fixture in the production line.

[0037] Step 3: Send the tray with the rolled blade blank into a blade production line based on array measurement and array grinding and polishing for processing to obtain a processed blade.

[0038] Step 3.1: Place the pallet with the rolled blade blanks into the parts waiting area.

[0039] Step 3.2: When the robot receives the equipment idle signal sent by the line laser array measuring device, the robot grasps the quick-change tooling on the pallet in the parts waiting area, and transfers the quick-change tooling together with the rolled blade blank clamped on the quick-change tooling to the line laser array measuring device. The robot stops moving after the preset number of quick-change tooling has been transferred.

[0040] In this embodiment, the pallet is placed in the waiting area, and after the line laser array measuring device sends an equipment idle signal, the robot grasps the side structure 4 of the quick-change fixture and sequentially places the 8 rolled blade blanks together with the quick-change fixture from the pallet in the waiting area onto the line laser device. The robot arm grasps the side structure 4 of the quick-change fixture to realize automatic and rapid loading and unloading of the blades on the measuring device and the grinding and polishing device, so as to reduce the reference error caused by the secondary clamping of the parts, and at the same time reduce the clamping operation time and improve the processing efficiency.

[0041] Step 3.3: The line laser array measuring device converts the device idle signal into a measuring signal, and executes the set blade measurement program to obtain the machining allowances of all rolled blade blanks.

[0042] In this embodiment, the status signal of the measuring device is changed to measuring, and 8 rolled blade blanks are measured simultaneously by executing one measurement program. The measurement data is then processed and evaluated and measurement reports for each of the 8 rolled blade blanks are issued.

[0043] Step 3.4: The rolled blade blanks are divided into several groups according to the machining allowances of all rolled blade blanks to obtain blade grouping information. After the grouping is completed, the line laser array measurement device sends a measurement completion signal and blade grouping information to the robot.

[0044] Step 3.5: The robot transfers the rolled blade blanks to the transfer area according to the received blade grouping information. The transferred rolled blade blanks are placed in groups according to the blade grouping information. When all rolled blade blanks are transferred from the line laser array measuring device to the transfer area, the line laser array measuring device sends an equipment idle signal and executes step 3.2.

[0045] In this embodiment, each rolled blade blank is analyzed separately after measurement, and according to the minimum margin of each rolled blade blank after measurement, the rolled blade blanks are grouped at intervals of 0.1mm, that is, 0.1-0.2mm is a group, 0.2-0.3mm is a group, and 0.3-0.4mm is a group. Parts in the same group are selected during subsequent array grinding and polishing. At this time, the line laser array measurement device sends a measurement completion signal and blade grouping information. The robot places each rolled blade blank on a pallet in different areas of the transfer area according to the margin grouping information. After completion, the line laser array measurement device sends an equipment idle signal, and steps 3.2-3.5 are repeated.

[0046] Step 3.6: When the robot receives the equipment idle signal sent by the array grinding and polishing equipment, the robot grasps the quick-change tooling of the same group with the rolled blade blank clamped in the transfer area, and installs the quick-change tooling on the array grinding and polishing equipment. The robot stops moving after all the quick-change tooling of the same group has been transferred.

[0047] Step 3.7: The robot sends the blade grouping information of the quick-change tooling on the array grinding and polishing equipment to the array grinding and polishing equipment. The array grinding and polishing equipment converts the equipment idle signal into a processing signal, and selects the array grinding and polishing program matching the group of rolled blade blanks according to the blade grouping information and executes the array grinding and polishing process to obtain processed blades. After the processing is completed, the array grinding and polishing equipment sends a processing completion signal to the robot.

[0048] In this embodiment, after waiting for the array grinding and polishing equipment to send an equipment idle signal, the robot selects 8 blades from the same area of ​​the transfer area, installs them on the array grinding and polishing equipment, and transmits the selected blade group to the array grinding and polishing equipment, selects the corresponding array grinding and polishing program accordingly, and performs array grinding and polishing. After the array grinding and polishing equipment completes the processing, it sends a signal, and the robot removes the blades and puts them into the processing completion area to wait for subsequent processing.

[0049] Step 3.8: After receiving the processing completion signal, the robot removes the quick-change tooling on the array grinding and polishing equipment and places it in the processing completion area. When all the quick-change tooling on the array grinding and polishing equipment are removed, the array grinding and polishing equipment sends an equipment idle signal and executes step 3.6;

[0050] Step 3.9: Remove the blades from all quick-change tooling in the processing completion area to complete the preparation of the blades.

[0051] In this embodiment, the array grinding and polishing equipment sends a signal after the processing is completed, and the robot removes the blade together with the quick-change tooling and places it in the processing completion area to wait for subsequent processing. After the disassembly is completed, the array grinding and polishing equipment sends an equipment idle signal, and then executes step 3.6 to continue the array grinding and polishing processing on the next group of rolled blade blanks.

[0052] In this embodiment, during the operation of the production line, that is, during the execution of steps 3.1-3.8, the status of the line laser array measurement device and the array polishing device is detected in real time, and step 3.2 or step 3.6 is executed after the device sends an idle signal.

[0053] In this embodiment, by using the process scheme designed based on array measurement and array grinding and polishing, batch rapid precision machining of compressor stator blades can be performed, while improving machining quality and efficiency, the number of parts scrapped due to out-of-tolerance caused by raw material factors can also be reduced, and the cost saving is calculated as follows: (equipment depreciation × 0.5 days ÷ total annual working hours of equipment + ∑ tool unit price × reduced tool consumption quota) * number of units per unit * unit = 250,000 yuan. It can be seen that the blade preparation method based on array measurement and array grinding and polishing proposed in this embodiment has significant economic benefits.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of the present invention.

Claims

1. A blade preparation method based on array measurement and array polishing, characterized in that: The method comprises the following steps: Step 1: Build a blade production line based on array measurement and array grinding and polishing; Step 2: Use quick fixtures and pallets to clamp a preset number of rolled blade blanks; Step 3: Send the tray with the rolled blade blank into a blade production line based on array measurement and array grinding and polishing for processing to obtain a processed blade.

2. A blade preparation method based on array measurement and array polishing according to claim 1, characterized in that: The blade production line based on array measurement and array grinding and polishing described in step 1 includes: a parts waiting area, a linear laser array measuring device, a transfer area, an array grinding and polishing device, a processing completion area, a production line guide rail, and a robot; wherein the parts waiting area, the linear laser array measuring device, the transfer area, the array grinding and polishing device, and the processing completion area are arranged in sequence on the same side of the production line guide rail in the production order; the robot includes a robotic arm and a slide; wherein the slide is installed on the production line guide rail, and the robotic arm is installed on the slide.

3. A blade preparation method based on array measurement and array polishing according to claim 2, characterized in that: The clamping method of the rolled blade blank described in step 2 is: install the rolled blade blank on the main body of the quick-change tooling, and place the quick-change tooling with the rolled blade blank on a pallet, wherein the lower interface of the quick-change tooling matches the pallet, and the number of clamping of the rolled blade blank is determined according to the number of interfaces on the pallet that match the quick-change tooling.

4. A blade preparation method based on array measurement and array polishing according to claim 3, characterized in that: The step 3 further comprises: Step 3.1: Place the tray with the rolled blade blank into the parts waiting area; Step 3.2: When the robot receives the device idle signal sent by the line laser array measuring device, the robot grabs the quick-change tooling on the tray in the parts waiting area, and transfers the quick-change tooling together with the rolled blade blank clamped on the quick-change tooling to the line laser array measuring device. After the preset number of quick-change tooling is transferred, the robot stops moving. Step 3.3: The line laser array measuring device converts the device idle signal into a measuring signal, and executes the set blade measurement program to obtain the machining allowances of all rolled blade blanks; Step 3.4: Divide the rolled blade blanks into several groups according to the machining allowances of all rolled blade blanks to obtain blade grouping information. After the grouping is completed, the line laser array measurement device sends a measurement completion signal and blade grouping information to the robot; Step 3.5: The robot transfers the rolled blade blanks to the transfer area according to the received blade grouping information. The transferred rolled blade blanks are grouped according to the blade grouping information. When all rolled blade blanks are transferred from the line laser array measuring device to the transfer area, the line laser array measuring device sends an equipment idle signal and executes step 3.2; Step 3.6: When the robot receives the equipment idle signal sent by the array grinding and polishing equipment, the robot grabs the quick-change fixture of the same group clamping the roll-rolled blade blank in the transfer area, and installs the quick-change fixture on the array grinding and polishing equipment. After all the quick-change fixtures of the same group are transferred, the robot stops moving; Step 3.7: The robot sends the blade grouping information of the quick-change tooling on the array grinding and polishing device to the array grinding and polishing device. The array grinding and polishing device converts the device idle signal into a processing signal, and selects the array grinding and polishing program matching the group of rolled blade blanks according to the blade grouping information and performs array grinding and polishing processing to obtain processed blades. After the processing is completed, the array grinding and polishing device sends a processing completion signal to the robot; Step 3.8: After receiving the processing completion signal, the robot removes the quick-change tooling on the array grinding and polishing equipment and places it in the processing completion area. When all the quick-change tooling on the array grinding and polishing equipment are removed, the array grinding and polishing equipment sends an equipment idle signal and executes step 3.6; Step 3.9: Remove the blades from all quick-change tooling in the processing completion area to complete the preparation of the blades.

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