A blade tip grinding process

Abstract

The blade tip grinding process disclosed by the application is convenient to operate, can improve the blade machining efficiency, improve the blade tip surface smoothness, make the size meet the technical index requirements, and avoid blade grinding vibration. The blade tip grinding process adopts a blade grinding device for processing, and further comprises the following steps: S1, mounting the blade on a blade mounting device; S2, mounting the blade mounting device with the blade on a machine tool body; S3, tool setting for the blade; setting the machining parameters according to the machining requirements; and starting the machine tool for processing. The blade tip grinding process can be convenient to operate, can simultaneously process multiple blades, and can improve the machining efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machining of blades for aeronautics and gas turbines, and in particular to a blade tip grinding process. BACKGROUND

[0002] It is known that, when finishing the tip of a blade, ordinary turning and milling cannot meet the accuracy requirements, and grinding is then used. However, during the grinding process, the surface of the blade will have tool marks due to the vibration of the blade, which will result in unqualified surface finish and size, and the integrity of the blade tip is difficult to guarantee.

[0003] The blade machining device in the prior art, such as the wheel disc blade tip grinding auxiliary device disclosed in Chinese Invention Patent CN 115122193 A, comprises at least two single-stage wheel discs. When used, the blade to be machined is installed on the appropriate single-stage wheel disc, and then the main shaft is installed together on the machine tool for machining. The tool setting disc on the main shaft can be used as a machining reference surface to accurately determine the size of the blade after grinding. When the machining of a blade of one specification is completed, a blade of another specification is installed on the appropriate single-stage wheel disc, and the grinding of the blade of another specification can be realized by replacing the single-stage wheel disc. Compared with the method of directly installing the blade on the gas turbine rotor for machining in the prior art, the auxiliary device of the application can realize the machining of the blade on the single-stage wheel disc of the gas turbine rotor, the tooling structure is simple, the machining and manufacturing are convenient, and the grinding efficiency of the blade is improved.

[0004] Although the above-mentioned device can improve the machining efficiency, during the grinding of the tip of the blade using the above-mentioned device, the blade is prone to vibration and tool setting, which results in low machining accuracy and difficulty in guaranteeing the surface finish of the tip. Moreover, there is no mature process in the prior art to avoid vibration during the grinding of the tip of the blade. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a blade tip grinding process which is convenient to operate, can improve the machining efficiency of the blade, improve the surface finish of the tip of the blade, make the size meet the technical index requirements, and avoid the vibration of the blade during grinding.

[0006] The technical solution adopted by the present application to solve the technical problem is: a blade tip grinding process, which is processed by a blade grinding device. The blade grinding device comprises a machine tool body. One end of the machine tool body is provided with a rotating shaft driving box body, and the other end is provided with a fixed seat. A sliding clamping seat is arranged on the fixed seat.

[0007] The rear side of the machine tool body is provided with a vertical support plate; the upper end of the vertical support plate is provided with a guide rail; the guide rail is provided with a sliding table; the sliding table is provided with a vertical guide rail; the vertical guide rail is provided with a vertical sliding block; the vertical sliding block is provided with a grinding device; the top end of the vertical guide rail is provided with a telescopic cylinder for driving the vertical sliding block to vertically slide;

[0008] The sliding clamping seat is provided with a rotating shaft top tightening shaft; the rotating shaft driving box is provided with a driving rotating shaft; a blade mounting device is arranged between the rotating shaft top tightening shaft and the driving rotating shaft; the blade mounting device comprises a rotating shaft; one end of the rotating shaft is provided with a shaft shoulder;

[0009] A blade mounting disc is sleeved on the rotating shaft; a radial fixing key is arranged between the blade mounting disc and the rotating shaft; one side of the blade mounting disc is provided with a convex flange boss; the blade mounting disc is provided with a blade mounting groove; the blade mounting groove extends into the convex flange boss;

[0010] The other side of the blade mounting disc is provided with a connecting sleeve; the connecting sleeve is sleeved with a clamping disc; one side of the clamping disc is provided with a locking sleeve; the locking sleeve is threadedly connected with the connecting sleeve; one side of the connecting sleeve is provided with a second locking sleeve; the second locking sleeve and the shaft shoulder fix the blade mounting disc on the rotating shaft; both ends of the rotating shaft are provided with support bearing seats;

[0011] Further comprising the following steps:

[0012] S1, mounting the blade on the blade mounting device;

[0013] Loosen the locking sleeve to form a gap between the clamping disc and the blade mounting disc, then add lubricating oil in the blade mounting groove on the blade mounting disc; mount the blade in the blade mounting groove on the blade mounting disc;

[0014] Tighten the locking sleeve to press the clamping disc on the blade mounting disc, so that the blade is fixed in the blade mounting groove; the locking torque of the locking sleeve is 30-50 N.m;

[0015] S2, mounting the blade mounting device provided with the blade on the machine tool body;

[0016] Move the blade mounting device between the fixed seat and the sliding clamping seat, and make the rotating shaft of the blade mounting device coaxial with the rotating shaft top tightening shaft and the driving rotating shaft, and make one end of the rotating shaft drivingly connected with the driving rotating shaft; clamp the blade mounting device by moving the sliding clamping seat;

[0017] S3, tool setting for the blade; set the machining parameters according to the machining requirements; start the machine tool to process.

[0018] Further, in step S3, the tool setting is realized by setting a tool setting reference boss on the clamping disc.

[0019] Further, in step S3, the rotating speed of the grinding device is set to 2000-2200 rpm.

[0020] Further, in step S1, the lubricating oil is synthetic machine oil.

[0021] Further, in step S2, a telescopic device is set on the base of the support bearing seat, and a bearing seat matched with the rotating shaft is set on the upper end of the telescopic device, so that the height of the rotating shaft is adjusted by adjusting the telescopic device, and the rotating shaft is coaxial with the top clamping shaft and the driving rotating shaft.

[0022] The blade tip grinding process has the advantages that the blade tip grinding device is used, the blade tip grinding device is provided with a convex boss on the blade mounting disc, the blade mounting groove extends into the convex boss, the blade tip position is fixedly mounted on the blade mounting disc after the blade is mounted, blade vibration during blade grinding is avoided, grinding error is avoided, the grinding precision of the blade is ensured, and the surface smoothness of the blade tip is improved.

[0023] Secondly, the bearing support seats are arranged at both ends of the rotating shaft, the stability of the device is further improved, and the lifting device is arranged on the bearing support seat, so that the height is adjusted, and the device is used on different machine tools.

[0024] Thirdly, the locking torque of the locking sleeve 94 is 30-50 N.m in step S1, so that the blade is pressed without excessive extrusion.

[0025] Thirdly, the plurality of blade mounting grooves are arranged on the blade mounting disc, so that one-time processing of a plurality of blades is realized, and the processing efficiency is improved. DETAILED DESCRIPTION

[0026] Figure 1 is a structure schematic view of the blade mounted on the mounting disc in the embodiment of the present application;

[0027] Figure 2 is a structure schematic view of the blade mounted on the mounting disc in the embodiment of the present application;

[0028] Figure 3 is a structure schematic view of the blade mounted on the mounting disc in the embodiment of the present application;

[0029] Figure 4 is a structure schematic view of the blade mounted on the mounting disc in the embodiment of the present application;

[0030] Figure 5 This is a perspective view of the blade tip grinding device after the blades are installed in an embodiment of the present invention;

[0031] Figure 6 This is a front view of the blade tip grinding device in an embodiment of the present invention;

[0032] Figure 7 This is a top view of the blade tip grinding device in an embodiment of the present invention;

[0033] Figure 8 This is a perspective view of the blade mounting plate after the blades are installed in an embodiment of the present invention;

[0034] Figure 9 This is an exploded schematic diagram of the blade mounting device in an embodiment of the present invention;

[0035] The diagram shows: 1-machine tool body, 2-rotating shaft drive housing, 3-fixed seat, 5-sliding clamping seat, 6-vertical support plate, 7-guide rail, 8-slide table, 9-blade mounting device, 10-blade, 101-blade tip. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] like Figures 1 to 5 As shown, the blade tip grinding process of the present invention is carried out by a blade grinding device, which includes a machine tool body 1; a rotating shaft drive housing 2 is provided at one end of the machine tool body 1, and a fixed seat 3 is provided at the other end; a sliding clamping seat 5 is provided on the fixed seat 3.

[0038] A vertical support plate 6 is provided on the rear side of the machine tool body 1; a guide rail 7 is provided on the upper end of the vertical support plate 6; a slide table 8 is provided on the guide rail 7; a vertical guide rail 81 is provided on the slide table 8; a vertical slider 82 is provided on the vertical guide rail 81; a grinding device is provided on the vertical slider 82; and a telescopic cylinder 83 for driving the vertical slider 82 to slide vertically is provided at the top of the vertical guide rail 81.

[0039] The sliding clamping seat 5 is provided with a rotating shaft clamping shaft; the rotating shaft drive housing 2 is provided with an active rotating shaft; a blade mounting device 9 is provided between the rotating shaft clamping shaft and the active rotating shaft; the blade mounting device 9 includes a rotating shaft 91; a shoulder 911 is provided at one end of the rotating shaft 91.

[0040] The rotating shaft 91 is sleeved with a blade mounting disc 92; the blade mounting disc 92 and the rotating shaft 91 are provided with only radial fixing keys; one side of the blade mounting disc 92 is provided with a convex flange boss 921; the blade mounting disc 92 is provided with a blade mounting groove 922; the blade mounting groove 922 extends into the convex flange boss 921;

[0041] Specifically, the blade mounting disc 92 is uniformly distributed along the circumference, and the blade mounting groove 922 extends into the convex flange boss 921, so that the convex flange boss 921 can support the blade 10 and fix the blade, and only the blade tip is located outside the convex flange boss 921. The blade mounting groove 922 can be provided as a through groove, such as Figure 3 and Figure 4 As shown in the drawings, the blade mounting groove 922 can fix the root of the blade 10, and the blade tip 101 can extend out of the blade mounting groove 922, which is convenient for machining the blade tip 101.

[0042] The other side of the blade mounting disc 92 is provided with a connecting sleeve 923; the connecting sleeve 923 is sleeved with a clamping disc 93; one side of the clamping disc 93 is provided with a locking sleeve 94; the locking sleeve 94 is threadedly connected with the connecting sleeve 923; one side of the connecting sleeve 923 is provided with a second locking sleeve 95; the second locking sleeve 95 and the shaft shoulder 911 fix the blade mounting disc 92 on the rotating shaft 91; both ends of the rotating shaft 91 are provided with support bearing seats 96;

[0043] Specifically, in order to adjust the height of the blade mounting disc 92, further, the lifting device adopts a manual mechanical telescopic rod. In order to realize tool setting and ensure machining accuracy, further, the clamping disc 93 is provided with a tool setting reference boss 931. In order to tighten the locking sleeve 94, further, the outer circumferential surface of the locking sleeve 94 is provided with uniformly distributed insertion grooves 941 along the circumference.

[0044] Further comprising the following steps:

[0045] S1, install the blade 10 on the blade mounting device 9;

[0046] Loosen the locking sleeve 94 to form a gap between the clamping disc 93 and the blade mounting disc 92, then add lubricating oil in the blade mounting groove 922 on the blade mounting disc 92; install the blade 10 in the blade mounting groove 922 on the blade mounting disc 92; make the blade tip 101 extend out of the blade mounting groove 922;

[0047] Tighten the locking sleeve 94 to press the clamping disc 93 on the blade mounting disc 92, so that the blade 10 is fixed in the blade mounting groove 922; the locking torque of the locking sleeve 94 is 30 to 50 N.m;

[0048] S2, install the blade installation device 9 provided with the blade 10 on the machine tool body 1;

[0049] Move the blade installation device 9 between the fixed seat 3 and the sliding clamping seat 5, and make the rotating shaft 91 of the blade installation device 9 coaxial with the rotating shaft top pressing shaft and the driving rotating shaft, and make one end of the rotating shaft 91 drivingly connected with the driving rotating shaft; clamp the blade installation device 9 by moving the sliding clamping seat 5;

[0050] S3, perform tool setting on the blade 10; set the machining parameters according to the machining requirements; start the machine tool to perform machining.

[0051] In step S1, the lubricating oil is added in the blade installation groove 922 to avoid damage to the blade 10 during installation in the blade installation groove; and the locking torque of the locking sleeve 94 is set to 30-50 N.m, so that the blade 10 is fixed and clamped.

[0052] In step S2, the positioning of the blade installation device 9 can ensure the machining size and machining accuracy during machining.

[0053] As described above, the blade tip grinding process provided by the application adopts the blade grinding device, the blade installation groove extends into the convex boss on the blade installation disc, so that after the blade is installed, the blade tip position of the blade is fixedly installed on the blade installation disc to form an integral whole, thereby avoiding blade vibration during grinding, reducing grinding error, ensuring the grinding accuracy of the blade, and improving the surface finish of the blade tip.

[0054] Secondly, the bearing support seat is arranged at both ends of the rotating shaft, which further improves the stability of the equipment, and the lifting device is arranged on the bearing support seat, so that the height is adjusted, and the device is used on different machine tools.

[0055] Thirdly, the locking torque of the locking sleeve 94 is set to 30-50 N.m in step S1, so that the blade is pressed without excessive extrusion.

[0056] Thirdly, a plurality of blade installation grooves are arranged on the blade installation disc, so that one-time machining of multiple blades is realized, and the machining efficiency is improved.

[0057] In a feasible embodiment, in order to facilitate operation, in step S3, the tool setting is realized by arranging the tool setting reference boss 931 on the clamping disc 93.

[0058] In a feasible embodiment, in order to reduce the vibration during the grinding process, further, the rotating speed of the grinding device is set to 2000-2200 rpm in step S3.

[0059] In a feasible embodiment, in order to improve the lubrication effect, the lubricating oil is synthetic machine oil in step S1.

[0060] In a feasible embodiment, in order to facilitate the height adjustment of the blade mounting device, further, a telescopic device 962 is arranged on the base 963 of the support bearing seat 96 in step S2; the upper end of the telescopic device 962 is provided with a bearing seat 961 matched with the rotating shaft 91; the height of the rotating shaft 91 is adjusted by adjusting the telescopic device 962; and the rotating shaft 91 is coaxial with the rotating shaft top pressing shaft and the driving rotating shaft.

Claims

1. A blade tip grinding process, characterized by: The machining is carried out by using a blade grinding device, which comprises a machine tool body (1); one end of the machine tool body (1) is provided with a rotating shaft driving box (2), and the other end is provided with a fixed seat (3); a sliding clamping seat (5) is arranged on the fixed seat (3); A vertical support plate (6) is arranged on the rear side of the machine tool body (1); a guide rail (7) is arranged on the upper end of the vertical support plate (6); a sliding table (8) is arranged on the guide rail (7); a vertical guide rail (81) is arranged on the sliding table (8); a vertical sliding block (82) is arranged on the vertical guide rail (81); a grinding device is arranged on the vertical sliding block (82); a telescopic cylinder (83) for driving the vertical sliding block (82) to vertically slide is arranged at the top end of the vertical guide rail (81); A rotating shaft pressing shaft is arranged on the sliding clamping seat (5); the rotating shaft driving box (2) is provided with a driving rotating shaft; a blade mounting device (9) is arranged between the rotating shaft pressing shaft and the driving rotating shaft; the blade mounting device (9) comprises a rotating shaft (91); one end of the rotating shaft (91) is provided with a shaft shoulder (911); A blade mounting disc (92) is sleeved on the rotating shaft (91); a radial fixing key is arranged between the blade mounting disc (92) and the rotating shaft (91); a convex boss (921) is arranged on one side of the blade mounting disc (92); a blade mounting groove (922) is arranged on the blade mounting disc (92); the blade mounting groove (922) extends into the convex boss (921); The other side of the blade mounting disc (92) is provided with a connecting sleeve (923); a clamping disc (93) is sleeved on the connecting sleeve (923); a locking sleeve (94) is arranged on one side of the clamping disc (93); the locking sleeve (94) is threadedly connected with the connecting sleeve (923); a second locking sleeve (95) is arranged on one side of the connecting sleeve (923); the second locking sleeve (95) and the shaft shoulder (911) fix the blade mounting disc (92) on the rotating shaft (91); support bearing seats (96) are arranged at both ends of the rotating shaft (91); Further comprising the following steps: S1, mounting the blade (10) on the blade mounting device (9); Loosen the locking sleeve (94) to form a gap between the clamping disc (93) and the blade mounting disc (92), then add lubricating oil in the blade mounting groove (922) on the blade mounting disc (92); install the blade (10) in the blade mounting groove (922) on the blade mounting disc (92); Tighten the locking sleeve (94) to press the clamping disc (93) on the blade mounting disc (92), so that the blade (10) is fixed in the blade mounting groove (922); the locking torque of the locking sleeve (94) is 30-50 N.m; S2, mounting the blade mounting device (9) provided with the blade (10) on the machine tool body (1); The blade mounting device (9) is moved between the fixed seat (3) and the sliding clamping seat (5), and the rotating shaft (91) of the blade mounting device (9) is coaxial with the rotating shaft top clamping shaft and the driving rotating shaft, and one end of the rotating shaft (91) is drivingly connected with the driving rotating shaft; the blade mounting device (9) is clamped by moving the sliding clamping seat (5); S3, the blade (10) is measured; according to the processing requirement, the processing parameter is set; the machine tool is started to process.

2. A blade tip grinding process as claimed in claim 1, characterized in that: In step S3, the tool setting is realized by setting the tool setting reference boss (931) on the clamping disc (93).

3. A blade tip grinding process as claimed in claim 2, characterized in that: In step S3, the rotating speed of the grinding device is set to 2000-2200 rpm.

4. A blade tip grinding process as claimed in claim 3, characterized in that: In step S1, the lubricating oil is synthetic machine oil.

5. A blade tip grinding process as claimed in claim 4, characterized in that: In step S2, the telescopic device (962) is arranged on the base (963) of the supporting bearing seat (96); the upper end of the telescopic device (962) is provided with a bearing seat (961) matched with the rotating shaft (91); the height of the rotating shaft (91) is adjusted by adjusting the telescopic device (962); the rotating shaft (91) is coaxial with the rotating shaft top clamping shaft and the driving rotating shaft.

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