WO2023123207A1 - Process method for improving surface smoothness of combustion turbine blade profile surface - Google Patents

Process method for improving surface smoothness of combustion turbine blade profile surface Download PDF

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Publication number
WO2023123207A1
WO2023123207A1 PCT/CN2021/143079 CN2021143079W WO2023123207A1 WO 2023123207 A1 WO2023123207 A1 WO 2023123207A1 CN 2021143079 W CN2021143079 W CN 2021143079W WO 2023123207 A1 WO2023123207 A1 WO 2023123207A1
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Prior art keywords
blade
improving
process method
gas turbine
turbine blade
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PCT/CN2021/143079
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French (fr)
Chinese (zh)
Inventor
任勇
姚梦曲
冯相如
蒯孝蔚
潘利军
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无锡透平叶片有限公司
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Publication of WO2023123207A1 publication Critical patent/WO2023123207A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Definitions

  • the invention belongs to the related technical field of blade processing, and in particular relates to a process method for improving the smoothness of the profile surface of a gas turbine blade.
  • the purpose of the present invention is to provide a process method for improving the surface finish of the blade profile surface of a gas turbine, so as to solve the problems raised in the above-mentioned background technology, which can improve the profile surface of the blade without destroying the shot peening marks on the profile surface of the blade.
  • Surface finish is to provide a process method for improving the surface finish of the blade profile surface of a gas turbine, so as to solve the problems raised in the above-mentioned background technology, which can improve the profile surface of the blade without destroying the shot peening marks on the profile surface of the blade.
  • the present invention provides the following technical solutions.
  • a process method for improving the surface finish of a gas turbine blade surface which is characterized in that it includes the following steps: Step 1. Install the shot-peened blade on a blade six-axis linkage CNC abrasive belt grinder and use a nylon belt to grind the blade. Perform CNC polishing on the processing area; step 2, vibrate and polish the blades after CNC polishing.
  • step 1 set the moving speed of the nylon belt to 4500-5000 mm/pm, the rotation speed of the nylon belt to 2500rpm-3000rpm, and the processing step of the nylon belt to be less than or equal to 1mm.
  • the pressure value between the blade and the polishing wheel equipped with a nylon belt is adjusted according to the roughness value of the blade profile surface.
  • the pressure value specifically selects the lightest pressure value of the contact between the polishing wheel and the blade that can be set by the blade six-axis linkage CNC abrasive belt grinder.
  • step 2 specifically includes: step 2.1, coarsely grinding the blade with resin abrasive; and step 2.2, fine grinding with brown corundum abrasive.
  • the resin abrasive is selected as a resin-based quartz sand grinding medium.
  • a circular pot-type vibrating finishing machine is used to perform three-dimensional rotational vibration, and alkaline soap liquid or special grinding liquid is added to assist during the vibration process.
  • the brown corundum abrasive is selected as a ceramic-based brown corundum grinding medium.
  • the present invention provides a process method for improving the surface finish of the profile surface of a gas turbine blade, which has the following beneficial effects:
  • the present invention uses the nylon belt on the blade six-axis linkage CNC abrasive belt grinder to perform shot peening
  • the strengthened blades are CNC polished, and then the vibration polishing machine is used to vibrate and polish the CNC polished blades, so that the roughness of the processed area on the surface of the blade surface is within Ra0.2, and it can be clearly seen
  • the shot peening craters can ensure the uniform distribution of the shot peening craters, thereby achieving the technical effect of not destroying the shot peening marks on the surface of the blade profile and improving the smoothness of the surface of the blade profile.
  • Fig. 1 is a flow chart of the present invention
  • Fig. 2 is the processing area of the blade
  • Fig. 3 is a schematic diagram of a six-axis linkage CNC abrasive belt grinder for the blade
  • Fig. 4 is a schematic diagram of shot peening craters in different states.
  • a process method for improving the surface finish of a gas turbine blade profile which includes the following steps: Step 1. Install the shot-peened blade on a blade six-axis linkage CNC abrasive belt grinder (such as As shown in Figure 3, the X-axis, Y-axis, Z-axis, a-axis, b-axis, and c-axis in the equipment are marked in Figure 3) and the processing area of the above-mentioned blades (as shown in Figure 2) is processed with a nylon belt. CNC polishing.
  • a blade six-axis linkage CNC abrasive belt grinder such as As shown in Figure 3, the X-axis, Y-axis, Z-axis, a-axis, b-axis, and c-axis in the equipment are marked in Figure 3
  • the processing area of the above-mentioned blades is processed with a nylon belt. CNC polishing.
  • the pressure value usually selects the lightest pressure value of the contact between the polishing wheel and the blade that can be set by the blade six-axis linkage CNC abrasive belt grinder.
  • Step 2 Vibrating and polishing the blades after CNC polishing, specifically including: Step 2.1, using resin abrasives to roughly grind the blades; Step 2.2, using brown corundum abrasives for fine grinding, and finally reaching a surface roughness of Ra0.2 state within.
  • the resin abrasive is selected as resin-based quartz sand grinding media; the brown corundum abrasive is selected as ceramic-based brown corundum grinding media.
  • a circular pot-type vibrating finishing machine is used for three-dimensional rotating vibration, and alkaline soap liquid or special grinding liquid is added to assist in the vibration process. The method of vibrating finishing can greatly reduce the processing time and ensure the surface quality.
  • the present invention uses the nylon belt on the blade six-axis linkage CNC abrasive belt grinder to perform CNC polishing on the blades after shot peening, and then uses a vibrating finishing machine to vibrate the CNC polished blades
  • Light decoration as shown in Figure 4, the roughness of the processed area on the surface of the blade surface is within Ra0.2, and the shot peening craters can be clearly seen and the shot peening craters can be evenly distributed, so that no Destroying the shot peening traces on the surface of the blade profile can also improve the technical effect of the smoothness of the surface of the blade profile.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

The present invention aims to provide a process method for improving the surface smoothness of a combustion turbine blade profile surface, and is capable of improving the smoothness of a blade profile surface without destroying traces formed on the blade profile surface by shot blasting, and is characterized by comprising the following steps: step 1, placing a blade that has been subjected to shot blasting strengthening on a computer numerically controlled six-axis linkage abrasive belt grinder for blades, and using a nylon belt to carry out computer numerically controlled polishing and grinding on a region to be processed of the blade; and step 2, carrying out vibratory finishing on the blade that has been subjected to computer numerically controlled polishing and grinding.

Description

一种燃机叶片型面表面提高表面光洁度的工艺方法A process method for improving the surface finish of a gas turbine blade profile surface 技术领域technical field
本发明属于叶片加工相关技术领域，具体涉及一种燃机叶片型面表面提高表面光洁度的工艺方法。The invention belongs to the related technical field of blade processing, and in particular relates to a process method for improving the smoothness of the profile surface of a gas turbine blade.
背景技术Background technique
一方面为了提高燃机叶片的表面强度，需要对叶片的型面表面进行喷丸强化，这样会导致强化后的型面表面光洁度很低。另一方面为满足整机的效率，需要叶片的型面表面光洁度高，因为叶片的型面表面光洁度越高，气流经过叶片型面表面时阻力越小，整机的效率就越高。因此当前亟需一种工艺方法即不破坏叶片型面表面的喷丸痕迹又能够提高叶片型面表面的光洁度。On the one hand, in order to improve the surface strength of gas turbine blades, it is necessary to carry out shot peening on the profile surface of the blade, which will lead to a very low surface finish after strengthening. On the other hand, in order to meet the efficiency of the whole machine, the surface finish of the blade needs to be high, because the higher the surface finish of the blade, the smaller the resistance when the airflow passes through the surface of the blade, and the higher the efficiency of the whole machine. Therefore, there is an urgent need for a process method that does not destroy the shot peening marks on the surface of the blade profile and can improve the smoothness of the surface of the blade profile.
技术问题technical problem
本发明的目的在于提供一种燃机叶片型面表面提高表面光洁度的工艺方法，以解决上述背景技术中提出的问题，其能够即不破坏叶片型面表面的喷丸痕迹又能够提高叶片型面表面的光洁度。The purpose of the present invention is to provide a process method for improving the surface finish of the blade profile surface of a gas turbine, so as to solve the problems raised in the above-mentioned background technology, which can improve the profile surface of the blade without destroying the shot peening marks on the profile surface of the blade. Surface finish.
技术解决方案technical solution
为实现上述目的，本发明提供如下技术方案。To achieve the above object, the present invention provides the following technical solutions.
一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：包括以下步骤：步骤1、将喷丸强化后的叶片装在叶片六轴联动数控砂带磨床上用尼龙带对上述叶片的加工区域进行数控抛磨；步骤2、对数控抛磨后的叶片进行振动光饰。A process method for improving the surface finish of a gas turbine blade surface, which is characterized in that it includes the following steps: Step 1. Install the shot-peened blade on a blade six-axis linkage CNC abrasive belt grinder and use a nylon belt to grind the blade. Perform CNC polishing on the processing area; step 2, vibrate and polish the blades after CNC polishing.
进一步的，所述步骤1中数控抛磨时，设置尼龙带的移动速度为4500~5000 mm/pm、尼龙带的转速为2500rpm~3000rpm、尼龙带的加工步距为小于等于1mm。Further, during the CNC polishing in the step 1, set the moving speed of the nylon belt to 4500-5000 mm/pm, the rotation speed of the nylon belt to 2500rpm-3000rpm, and the processing step of the nylon belt to be less than or equal to 1mm.
进一步的，所述步骤1中数控抛磨时，根据叶片型面表面的粗糙度值来调节叶片和装尼龙带的抛光轮之间的压力值。Further, during the numerical control polishing in the step 1, the pressure value between the blade and the polishing wheel equipped with a nylon belt is adjusted according to the roughness value of the blade profile surface.
进一步的，所述压力值具体选用叶片六轴联动数控砂带磨床所能设置的抛光轮和叶片之间接触的最轻压力值。Further, the pressure value specifically selects the lightest pressure value of the contact between the polishing wheel and the blade that can be set by the blade six-axis linkage CNC abrasive belt grinder.
进一步的，所述步骤2具体包括：步骤2.1、采用树脂磨料对叶片进行粗研磨；步骤2.2、采用棕刚玉磨料进行精研磨。Further, the step 2 specifically includes: step 2.1, coarsely grinding the blade with resin abrasive; and step 2.2, fine grinding with brown corundum abrasive.
进一步的，所述树脂磨料选型为树脂基石英砂研磨介质。Further, the resin abrasive is selected as a resin-based quartz sand grinding medium.
进一步的，所述步骤2.1采用圆形锅式振动光饰机进行三维旋转振动，振动过程中添加碱性肥皂液或专用研磨液进行辅助。Further, in the step 2.1, a circular pot-type vibrating finishing machine is used to perform three-dimensional rotational vibration, and alkaline soap liquid or special grinding liquid is added to assist during the vibration process.
进一步的，所述棕刚玉磨料选型为陶瓷基棕刚玉研磨介质。Further, the brown corundum abrasive is selected as a ceramic-based brown corundum grinding medium.
有益效果Beneficial effect
与现有技术相比，本发明提供了一种燃机叶片型面表面提高表面光洁度的工艺方法，具备以下有益效果：本发明通过使用叶片六轴联动数控砂带磨床上的尼龙带对喷丸强化后的叶片进行数控抛磨，再使用振动光饰机对数控抛磨后的叶片进行振动光饰，达到了叶片型面表面的加工区域的粗糙度在Ra0.2以内，并且既能明显见到喷丸弹坑又能保证喷丸弹坑均匀分布，从而实现了即不破坏叶片型面表面的喷丸痕迹又能够提高叶片型面表面的光洁度的技术效果。Compared with the prior art, the present invention provides a process method for improving the surface finish of the profile surface of a gas turbine blade, which has the following beneficial effects: the present invention uses the nylon belt on the blade six-axis linkage CNC abrasive belt grinder to perform shot peening The strengthened blades are CNC polished, and then the vibration polishing machine is used to vibrate and polish the CNC polished blades, so that the roughness of the processed area on the surface of the blade surface is within Ra0.2, and it can be clearly seen The shot peening craters can ensure the uniform distribution of the shot peening craters, thereby achieving the technical effect of not destroying the shot peening marks on the surface of the blade profile and improving the smoothness of the surface of the blade profile.
附图说明Description of drawings
图1为本发明的流程图；图2为叶片的加工区域；图3为叶片六轴联动数控砂带磨床的示意图；图4为不同状态的喷丸弹坑示意图。Fig. 1 is a flow chart of the present invention; Fig. 2 is the processing area of the blade; Fig. 3 is a schematic diagram of a six-axis linkage CNC abrasive belt grinder for the blade; Fig. 4 is a schematic diagram of shot peening craters in different states.
本发明的实施方式Embodiments of the present invention
如图1-4所示，一种燃机叶片型面表面提高表面光洁度的工艺方法，其包括以下步骤：步骤1、将喷丸强化后的叶片装在叶片六轴联动数控砂带磨床（如图3所示，图3中标注了该设备中的X轴、Y轴、Z轴、a轴、b轴、c轴）上用尼龙带对上述叶片的加工区域（如图2所示）进行数控抛磨。数控抛磨时，设置尼龙带的移动速度为4500~5000 mm/pm、尼龙带的转速为2500rpm~3000rpm、尼龙带的加工步距为小于等于1mm；还要根据叶片型面表面的粗糙度值来调节叶片和装尼龙带的抛光轮之间的压力值，所述压力值通常选用叶片六轴联动数控砂带磨床所能设置的抛光轮和叶片之间接触的最轻压力值。As shown in Figure 1-4, a process method for improving the surface finish of a gas turbine blade profile, which includes the following steps: Step 1. Install the shot-peened blade on a blade six-axis linkage CNC abrasive belt grinder (such as As shown in Figure 3, the X-axis, Y-axis, Z-axis, a-axis, b-axis, and c-axis in the equipment are marked in Figure 3) and the processing area of the above-mentioned blades (as shown in Figure 2) is processed with a nylon belt. CNC polishing. During CNC polishing, set the moving speed of the nylon belt to 4500~5000 mm/pm, the rotation speed of the nylon belt to 2500rpm~3000rpm, and the processing step of the nylon belt to be less than or equal to 1mm; also according to the roughness value of the blade surface surface To adjust the pressure value between the blade and the polishing wheel of the nylon belt, the pressure value usually selects the lightest pressure value of the contact between the polishing wheel and the blade that can be set by the blade six-axis linkage CNC abrasive belt grinder.
步骤2、对数控抛磨后的叶片进行振动光饰，具体包括：步骤2.1、采用树脂磨料对叶片进行粗研磨；步骤2.2、采用棕刚玉磨料进行精研磨，最终达到表面粗糙度在Ra0.2以内的状态。所述树脂磨料选型为树脂基石英砂研磨介质；所述棕刚玉磨料选型为陶瓷基棕刚玉研磨介质。所述步骤2.1采用圆形锅式振动光饰机进行三维旋转振动，振动过程中添加碱性肥皂液或专用研磨液进行辅助。采用振动光饰的方式可大幅减少加工时间，保证表面质量。Step 2. Vibrating and polishing the blades after CNC polishing, specifically including: Step 2.1, using resin abrasives to roughly grind the blades; Step 2.2, using brown corundum abrasives for fine grinding, and finally reaching a surface roughness of Ra0.2 state within. The resin abrasive is selected as resin-based quartz sand grinding media; the brown corundum abrasive is selected as ceramic-based brown corundum grinding media. In the step 2.1, a circular pot-type vibrating finishing machine is used for three-dimensional rotating vibration, and alkaline soap liquid or special grinding liquid is added to assist in the vibration process. The method of vibrating finishing can greatly reduce the processing time and ensure the surface quality.
上述数控抛磨后叶片抛磨区域表面还留有抛磨痕迹，并且表面一致性差，需要通过振动光饰来进一步降低表面粗糙度，同时去除抛磨痕迹，并留有光饰痕迹，从而达到表面外观的一致性和完整性。After the above-mentioned CNC polishing, there are still polishing traces on the surface of the blade polishing area, and the surface consistency is poor. It is necessary to further reduce the surface roughness by vibrating polishing, and at the same time remove the polishing traces and leave polishing traces, so as to achieve the surface Consistency and integrity of appearance.
如图1所示流程，本发明通过使用叶片六轴联动数控砂带磨床上的尼龙带对喷丸强化后的叶片进行数控抛磨，再使用振动光饰机对数控抛磨后的叶片进行振动光饰，达到了如图4所示，叶片型面表面的加工区域的粗糙度在Ra0.2以内，并且既能明显见到喷丸弹坑又能保证喷丸弹坑均匀分布，从而实现了即不破坏叶片型面表面的喷丸痕迹又能够提高叶片型面表面的光洁度的技术效果。The process shown in Figure 1, the present invention uses the nylon belt on the blade six-axis linkage CNC abrasive belt grinder to perform CNC polishing on the blades after shot peening, and then uses a vibrating finishing machine to vibrate the CNC polished blades Light decoration, as shown in Figure 4, the roughness of the processed area on the surface of the blade surface is within Ra0.2, and the shot peening craters can be clearly seen and the shot peening craters can be evenly distributed, so that no Destroying the shot peening traces on the surface of the blade profile can also improve the technical effect of the smoothness of the surface of the blade profile.

Claims (8)

  1. 一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：包括以下步骤：步骤1、将喷丸强化后的叶片装在叶片六轴联动数控砂带磨床上用尼龙带对上述叶片的加工区域进行数控抛磨；步骤2、对数控抛磨后的叶片进行振动光饰。A process method for improving the surface finish of a gas turbine blade surface, which is characterized in that it includes the following steps: Step 1. Install the shot-peened blade on a blade six-axis linkage CNC abrasive belt grinder and use a nylon belt to grind the blade. Perform CNC polishing on the processing area; step 2, vibrate and polish the blades after CNC polishing.
  2. 根据权利要求1所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述步骤1中数控抛磨时，设置尼龙带的移动速度为4500~5000 mm/pm、尼龙带的转速为2500rpm~3000rpm、尼龙带的加工步距为小于等于1mm。A process method for improving the surface finish of a gas turbine blade profile according to claim 1, characterized in that: during the numerical control polishing in the step 1, the moving speed of the nylon belt is set to 4500-5000 mm/pm, The rotation speed of the nylon belt is 2500rpm~3000rpm, and the processing step of the nylon belt is less than or equal to 1mm.
  3. 根据权利要求1所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述步骤1中数控抛磨时，根据叶片型面表面的粗糙度值来调节叶片和装尼龙带的抛光轮之间的压力值。According to claim 1, a process method for improving the surface finish of a gas turbine blade surface is characterized in that: during the numerical control polishing in the step 1, the blade and the nylon are adjusted according to the roughness value of the blade surface surface. The pressure value between the buffing wheels of the belt.
  4. 根据权利要求3所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述压力值具体选用叶片六轴联动数控砂带磨床所能设置的抛光轮和叶片之间接触的最轻压力值。According to claim 3, a process method for improving the surface finish of a gas turbine blade profile surface is characterized in that: the pressure value is specifically chosen between the polishing wheel and the blade that can be set on a six-axis linkage CNC abrasive belt grinder for the blade The lightest pressure value for contact.
  5. 根据权利要求1所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述步骤2具体包括：步骤2.1、采用树脂磨料对叶片进行粗研磨；步骤2.2、采用棕刚玉磨料进行精磨。According to claim 1, a method for improving the surface finish of a gas turbine blade profile surface is characterized in that: said step 2 specifically includes: step 2.1, using resin abrasives to roughly grind the blade; step 2.2, using brown Corundum abrasive for fine grinding.
  6. 根据权利要求5所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述树脂磨料选型为树脂基石英砂研磨介质。The process method for improving the surface finish of a gas turbine blade profile according to claim 5, characterized in that: the resin abrasive is selected as a resin-based quartz sand grinding medium.
  7. 根据权利要求5所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述步骤2.1采用圆形锅式振动光饰机进行三维旋转振动，振动过程中添加碱性肥皂液或专用研磨液进行辅助。According to claim 5, a process method for improving the surface finish of a gas turbine blade profile surface, characterized in that: said step 2.1 adopts a circular pot-type vibrating finishing machine for three-dimensional rotating vibration, adding alkali during the vibration process Soap solution or special grinding fluid is used for assistance.
  8. 根据权利要求5所述的一种燃机叶片型面表面提高表面光洁度的工艺方法，其特征在于：所述棕刚玉磨料选型为陶瓷基棕刚玉研磨介质。According to claim 5, a process method for improving the surface finish of a profile surface of a gas turbine blade, characterized in that: the brown corundum abrasive is selected as a ceramic-based brown corundum grinding medium.
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