A blade disk processing center

Abstract

The present invention provides a blade disk machining center, comprising: an A-axis rotary assembly, a B-axis rotary assembly, and a C-axis rotary assembly; the A-axis rotary assembly drives the blade disk to perform rotary motion; the B-axis rotary assembly drives the attachment head to perform rotary motion, and the attachment head drives the tool to process the blade disk; the C-axis rotary assembly drives the A-axis rotary assembly to perform rotary motion; the intersection of the rotation axis of the B-axis rotary assembly and the rotation axis of the C-axis rotary assembly is the center of the blade disk's machining area; the tool tip point is on the rotation axis of the B-axis rotary assembly. The machining area of ​​the present invention is near the rotation center of the C-axis turntable, which can ensure that when the machine tool performs five-axis rotary tool center machining, the movement speed and acceleration of each physical axis can be maintained within a lower range relative to a machine tool with an ordinary structure.

Description

Technical Field

[0001] The present invention relates to the field of machine tool processing, and in particular to a blade disk processing center. Background Art

[0002] The use of blisks in aircraft engines is a global development trend in aircraft engine technology. To expand their application, the manufacturing challenges of blisks must be addressed. Currently, the number of blisks used in Chinese aircraft engines is relatively small. The main reason for this lack of widespread adoption is the lack of manufacturing technology. Manufacturing challenges for aircraft engine blisks lie in the complex blade profiles, the high machining accuracy and surface quality requirements, the extremely high machining consistency, blade deformation, and the materials used. Blisks are often free-form surfaces, placing extremely high demands on machining accuracy and surface roughness. While achieving these machining accuracies is relatively easy when machining flat or cylindrical surfaces, achieving these requirements on free-form surfaces is more challenging. Achieving high machining accuracy is even more challenging due to the limited tool movement space during machining. Therefore, machining aircraft engine blisks remains a global challenge. Existing machine tools require extremely high speed and acceleration ranges for each physical axis when performing five-axis machining. Summary of the Invention

[0003] The present invention provides a blade disk machining center to overcome the above technical problems.

[0004] The present invention provides a blisk machining center, comprising: an A-axis rotary assembly, a B-axis rotary assembly, and a C-axis rotary assembly;

[0005] The A-axis rotary assembly drives the blade disk to perform rotary motion;

[0006] The B-axis rotary assembly drives the attachment head to perform rotary motion, and the attachment head drives the tool to process the blisk;

[0007] The C-axis rotary assembly drives the A-axis rotary assembly to perform rotary motion;

[0008] The intersection of the rotation axis of the B-axis rotary assembly and the rotation axis of the C-axis rotary assembly is the center of the processing area of ​​the blade disk; the tool tip point of the tool is on the rotation axis of the B-axis rotary assembly.

[0009] Furthermore, the A-axis rotary assembly is an A-axis turntable that drives the blade disk to rotate;

[0010] The B-axis rotary assembly includes: an accessory head for fixing the tool and a B-axis turntable; the B-axis turntable drives the accessory head to perform rotary motion;

[0011] The C-axis rotary assembly is a C-axis turntable;

[0012] The A-axis turntable is detachably connected to the C-axis turntable;

[0013] The rotation axis of the C-axis turntable is perpendicular to the horizontal plane and is perpendicular to the rotation axis of the blade disk.

[0014] Furthermore, the A-axis turntable is fixed to the top surface of the C-axis turntable; and the central axis of the A-axis turntable is the rotation axis of the blade disk.

[0015] Furthermore, it also includes a tool magazine for replacing tools, and the tool magazine is on the same side as the accessory head.

[0016] The processing area of ​​the present invention is near the rotation center of the C-axis turntable, which can ensure that when the machine tool performs five-axis rotary tool center (hereinafter referred to as RTCP) processing, the movement speed and acceleration of each physical axis can be maintained in a lower range compared with the machine tool of ordinary structure, and the central axis of the accessory head and the central axis of the slide form a 45° angle, ensuring that the accessory head will not generate large speed and acceleration of the linear axis when rotating the RTCP. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the overall structure of the blade disk processing center of the present invention;

[0019] Figure 2 Another perspective view of the overall structure of the blade disk processing center of the present invention;

[0020] Figure 3 A top view of the blade disk machining center of the present invention;

[0021] Figure 4 This is a flow chart of the blade disk processing method of the present invention;

[0022] Figure 5 The speed curves of the X-axis, Y-axis and Z-axis when the blade is processed by the present invention are shown;

[0023] Figure 6 This is a speed curve diagram of the X-axis, Y-axis and Z-axis when using the existing technology to process blades. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] The present invention provides a blade disk processing center, such as Figure 1 The figure shows the overall structure of the blisk machining center of the present invention; it includes: a bed 1, a slide 3, a column 4 and a ram; the slide 3 is slidably connected to the bed 1 via a guide rail, the column 4 is slidably connected to the slide 3 via a guide rail, and one end of the ram is slidably connected to the column 4 via a guide rail; it also includes: an A-axis rotary assembly, a B-axis rotary assembly and a C-axis rotary assembly;

[0026] The A-axis rotary assembly drives the blade disk 8 to rotate;

[0027] The B-axis rotary assembly drives the attachment head 6 to perform rotary motion, and the attachment head 6 drives the tool 7 to process the blisk 8;

[0028] The C-axis rotary assembly drives the A-axis rotary assembly to perform rotary motion;

[0029] The intersection of the rotation axis of the B-axis rotary assembly and the rotation axis of the C-axis rotary assembly is the center of the processing area of ​​the blade disk 8; the tool tip point of the tool 7 is on the rotation axis of the B-axis rotary assembly.

[0030] Furthermore, the A-axis rotary assembly is an A-axis turntable 10 that drives the blade disk 8 to rotate; the B-axis rotary assembly includes: an attachment head 6 for fixing the tool 7 and a B-axis turntable 5, the attachment head 6 is a 45° attachment head; one end of the 45° attachment head 6 is rotatably connected to one end of the B-axis turntable 5, the tool 7 is fixedly connected to the other end of the 45° attachment head 6, and the tool 7 is coaxial with the 45° attachment head 6; the center axis of the tool 7 and the axis of the B-axis turntable 5 are at an angle of 45°; the C ... the B-axis turntable 5, the attachment head 6 is a 45° attachment head; the C-axis rotary assembly includes: an attachment head 6 for fixing the tool 7 and the B-axis turntable 5, the attachment head 6 is a 45° attachment head; the C-axis rotary assembly includes: an attachment head 6 for fixing the tool 7 and the B-axis turntable 5, the attachment head 6 is a 45° attachment head; the C-axis rotary assembly includes: an attachment head 6 for fixing the tool 7 and the B-axis turntable 5, the attachment head 6 is a 45° attachment head; the C-axis rotary assembly includes: an attachment head 6 for fixing the tool 7 The rotating assembly is a C-axis turntable 9 that drives the A-axis turntable 10 to rotate; the A-axis turntable 10 and the C-axis turntable 9 are detachably connected so that the position of the A-axis turntable 10 can be adjusted before work, and the driving output end of the A-axis turntable 10 is connected to the blade disk 8; the rotation axis of the C-axis turntable 9 is perpendicular to the horizontal plane and is perpendicular to the rotation axis of the blade disk 8, and the tool 7 processes the blade disk 8; the A-axis rotation assembly and the C-axis rotation assembly are located in front of the 45° accessory head 6.

[0031] like Figure 2As shown, it is another perspective view of the overall structure of the blade disk processing center of the present invention. The blade disk processing mechanism includes: a B-axis turntable 5 that drives the 45° attachment head 6 to rotate, an A-axis turntable 10 that drives the blade disk 8 to rotate, a C-axis turntable 9 that drives the A-axis turntable 10 to rotate, and a driving mechanism 11 that drives the C-axis turntable 9 to rotate; the C-axis turntable 9 is circular in shape and parallel to the horizontal plane; the C-axis turntable 9 is fixed to the top surface of the A-axis turntable 10; the driving output end of the driving mechanism 11 is connected to the C-axis turntable 9 ; The A-axis turntable 10 is detachably connected to the C-axis turntable 9, and the A-axis turntable 10 has a built-in drive motor, and the output end of the drive motor is rotationally connected to the blade disk 8; the drive mechanism 11 has a built-in drive motor, which drives the C-axis turntable 9 to rotate along the C-axis, and the C-axis turntable 9 drives the A-axis turntable 10 to rotate synchronously, and the A-axis turntable 10 drives the blade disk 8 to rotate along the A-axis; the rotation axis of the C-axis turntable 9 is perpendicular to the horizontal plane, and is perpendicular to the rotation axis of the blade disk 8, and the tool 7 processes the side edge of the blade disk 8.

[0032] like Figure 3 As shown, the 45° attachment head 6 rotates along the B-axis; the intersection of the rotation axis of the B-axis rotary assembly and the rotation axis of the C-axis rotary assembly is the center of the processing area of ​​the blade disk 8; the tip point of the tool 7 is on the rotation axis of the B-axis rotary assembly.

[0033] The processing area of ​​the present invention is near the rotation center of the C-axis turntable 9, which can ensure that when the machine tool performs RTCP processing, the movement speed and acceleration of each physical axis can be maintained in a lower range compared to existing machine tools, and the angle α between the central axis of the 45° accessory head 6 and the central axis of the B-axis turntable 5 is 45°, ensuring that the 45° accessory head rotates RTCP without generating a large speed and acceleration of the linear axis.

[0034] Furthermore, in order to facilitate the wear of the tool 7 caused by long-term use during the processing, a tool magazine 2 for replacing the tool 7 is also included, and the tool magazine 2 is on the same side as the 45° accessory head 6; the tool magazine 2 includes: a cutter disc 2-1 and a cutter disc bracket 2-2, the cutter disc 2-1 is rotatably connected to the cutter disc bracket 2-2, and the rotation axis of the cutter disc 2-1 is parallel to the horizontal plane; the tool 7 is clamped with the side edge of the cutter disc 2-1. After processing one blade disk 8, the next blade disk is processed. The blades of the blade disk 8 can be processed by replacing the tools in the tool magazine 2; the 45° accessory head 6 moves alternately along the Z axis, Y axis and X axis to the tool disk 2-1, and the tool disk 2-1 is driven by a motor to rotate (the driving motor of the tool disk 2-1 is not shown in the figure), so that the hole where the tool 7 is fixed is rotated to the initial position, and the 45° accessory head 6 clamps the used tool into the hole, and the tool disk 2-1 rotates the tool 7 fixed thereon to the initial position, and the 45° accessory head 6 grabs the tool and processes the next blade disk.

[0035] Furthermore, if Figure 4 As shown, it also includes a processing method based on the above-mentioned processing center, including the following steps:

[0036] S1: The 45° attachment head rotates along the B axis, and the 45° attachment head drives the tool to rotate synchronously and processes the side edge of the blisk;

[0037] S2: The C-axis turntable 9 drives the A-axis turntable 10 and the blade disk 8 to rotate along the C-axis, and the tool 7 processes another angle of the blade disk 8 until one blade 8 - 1 is processed;

[0038] S3: The A-axis turntable 10 drives the blade disk 8 to rotate along the A-axis, and the tool 7 processes the blade at another point on the side edge of the blade disk 8 until the processing of multiple blades on the side edge of the blade disk is completed.

[0039] S4: After the blade processing is completed, the 45° accessory head 6 drives the tool 7 to move along the Z axis to the tool magazine 2 to replace the tool 7.

[0040] The present invention is suitable for processing blade disks with a diameter of about 1m and a blade length of about 200mm. The present invention uses the C-axis of the C-axis turntable 9 and the B-axis of the 45° accessory head 6 to perform five-axis RTCP processing motion to process the entire blade disk. The C-axis of the C-axis turntable 9 is a transfer axis and does not participate in the linkage processing action.

[0041] The present invention has the following advantages:

[0042] 1. The relative position of the blade disk 8 and the C-axis turntable 9 ensures that the processing area is near the rotation center of the C-axis turntable 9, thereby ensuring that when the machine tool performs five-axis RTCP processing, the movement speed and acceleration of each physical axis can be maintained in a lower range compared to a machine tool with an ordinary structure.

[0043] 2. The central axis of the 45° accessory head 6 forms a 45° angle with the central axis of the B-axis turntable 5, and the tip of the tool 7 is on the central axis of the B-axis turntable 5; ensuring that the 45° accessory head rotates RTCP without generating a large speed and acceleration of the linear axis.

[0044] 3. Avoid large spindle movements along the X, Y, and Z axes during machining.

[0045] Therefore, compared with existing machine tools, the present invention can make the distance between the tool and the rotation center of the 45° attachment head as close as possible when using a longer tool, thereby reducing the speed and acceleration requirements of the RTCP action on the linear axis.

[0046] In summary, the present invention has obvious advantages in the processing of the integral blade disk, especially in the position where the rotation axis of the leading and trailing edges of the blades has a large movement, the advantages are more obvious. Figure 5 As shown, it is a speed curve diagram of the X axis, Y axis and Z axis when the blade is processed by the present invention. Figure 6 The speed curve of X-axis, Y-axis and Z-axis when machining blades with the existing technology is shown in the figure. The speed of X-axis, Y-axis and Z-axis is compared when the existing machine tool of the present invention runs the same machining program. Figure 5 and Figure 6 From the comparison of the curves, it can be seen that when the blade is processed by the present invention, the movement speed and acceleration of each physical axis can be maintained in a lower range compared with the existing machine tools.

[0047] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blisk machining center, comprising: A-axis rotary assembly, B-axis rotary assembly and C-axis rotary assembly; The A-axis rotary assembly drives the blade disk (8) to perform rotary motion; The B-axis rotary assembly drives the attachment head (6) to perform rotary motion, and the attachment head (6) drives the tool (7) to process the blade disk (8); The C-axis rotary assembly drives the A-axis rotary assembly to perform rotary motion; The intersection of the rotation axis of the B-axis rotary assembly and the rotation axis of the C-axis rotary assembly is the center of the processing area of ​​the blade disk (8); the tool tip point of the tool (7) is on the rotation axis of the B-axis rotary assembly.

2. The machining center according to claim 1, characterized in that: The A-axis rotary assembly is an A-axis turntable (10) that drives the blade disk (8) to rotate; The B-axis rotary assembly comprises: an accessory head (6) for fixing a tool (7) and a B-axis turntable (5); the B-axis turntable (5) drives the accessory head (6) to perform a rotary motion; The C-axis rotary assembly is a C-axis turntable (9); The A-axis turntable (10) is detachably connected to the C-axis turntable (9); The rotation axis of the C-axis turntable (9) is perpendicular to the horizontal plane and is perpendicular to the rotation axis of the blade disk (8).

3. The machining center according to claim 2, characterized in that: The A-axis turntable (10) is fixed to the top surface of the C-axis turntable (9); the central axis of the A-axis turntable (10) is the rotation axis of the blade disk (8).

4. The machining center according to claim 3, characterized in that: It also includes a tool magazine (2) for replacing tools (7), and the tool magazine (2) is on the same side as the accessory head (6).

Images