A double-shouldered vane flat machining positioning device and machining method

Abstract

The application discloses a double-axle neck blade flat machining positioning device and a machining method, and the flat machining positioning device is mainly composed of a rotating disc, a V-shaped locking device and a positioning point locking device, the V-shaped locking device and the positioning point locking device are arranged on the rotating disc, the V-shaped locking device comprises a movable clamping block and a fixed clamping block, the movable clamping block comprises two V-shaped notches, and the fixed clamping block comprises two V-shaped notches. The positioning point locking device comprises a movable center and a fixed center. The V-shaped locking device is used for clamping upper and lower axles, the blade body positioning point is used for positioning, the positioning point locking device is arranged on the other side of the positioning point, the positioning point of the blade body and the flat machining positioning device is ensured to be always attached during machining, and finally the vertical direction machining of the flat is realized through rotation of the rotating disc. The requirement of a large-stroke four-axis vertical milling machine is converted into the requirement of the Z-axis direction stroke of a three-axis vertical numerical control milling machine, the equipment bottleneck is eliminated, and the use range of the machining equipment is expanded.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine blade machining technology, specifically an improved design of the positioning and clamping device for flattening double-journal blades, and a method for flattening. Background Technology

[0002] Currently, the machining of flattened double-journal blades is mainly performed on vertical CNC milling machines. One end of the double-journal blade is clamped using a special tooling, while the other end is clamped by a square clamp with a center. The flattened blade on the journal is then milled horizontally using the blade body positioning points. The existing machining method has the following main problems: First, the tolerance zone for flat blades is small, and the precision requirements are high. During milling, the positioning point is prone to deviating from the initial positioning position. In addition, for longer double-journey blades, the blade rigidity is insufficient. Using this clamping method, the part is prone to deformation, resulting in positioning errors and ultimately causing the half-width dimension of the flat blade to be unqualified. Secondly, the existing processing method requires a four-axis vertical CNC milling machine with an ultra-long stroke. The required length of the four-axis worktable is the length of the rotary table + fixture + part + center. This length requirement is heavily dependent on large-stroke equipment, which can easily cause equipment bottlenecks. Summary of the Invention

[0003] This invention aims to provide a positioning device and processing method for machining flat double-axis journal blades, solving the problems of machining accuracy and heavy reliance on large-stroke equipment, expanding the application range of processing equipment, and enabling machining to be achieved on ordinary three-axis vertical CNC milling machines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A positioning device for flattening dual-journey blades includes: A turntable, wherein the turntable is a circular disk with a rotating shaft at its center, and the turntable is rotatably connected to the rotating shaft; The V-shaped locking device is disposed on the axial first end face of the turntable. The V-shaped locking device includes a movable clamping block and a fixed clamping block. The movable clamping block is hinged to the axial first end face of the turntable, and the fixed clamping block is fixedly installed on the axial first end face of the turntable. The movable clamping block includes a first V-shaped groove and a second V-shaped groove distributed at intervals. The fixed clamping block includes a third V-shaped groove and a fourth V-shaped groove distributed at intervals. The openings of the first V-shaped groove and the third V-shaped groove are opposite to each other and are used for clamping the upper journal of the double-journal blade. The openings of the second V-shaped groove and the fourth V-shaped groove are opposite to each other and are used for clamping the lower journal of the double-journal blade. A positioning point locking device is provided on the axial first end face of the turntable. The positioning point locking device includes a movable center and a fixed center. The movable center is hinged to the axial first end face of the turntable, and the fixed center is vertically installed on the axial first end face of the turntable.

[0005] Furthermore, the dual-axis journal blade flattening positioning device also includes a channel steel base, with one end of the rotating shaft fixed to the non-groove end face of the channel steel base.

[0006] As one embodiment, the movable clamping block includes a first straight plate, a first channel steel, a first mounting base, a first stud, and a first nut. The first mounting base is fixed on the axial first end face of the turntable, and the first stud is vertically installed on the axial first end face of the turntable. One end of the first straight plate is hinged to the first mounting base, and the other end is opened and sleeved on the first stud through the hole and limited by the first nut. The first straight plate is vertically connected to the bottom plate of the first channel steel, and the ends of the two parallel side plates of the first channel steel are respectively opened with a first V-shaped groove and a second V-shaped groove. The fixed clamping block includes a second channel steel, and the ends of the two parallel side plates of the second channel steel are respectively opened with a third V-shaped groove and a fourth V-shaped groove. The bottom plate of the second channel steel is fixed on the first axial end face of the turntable.

[0007] As one solution: The movable tip includes a second straight plate, a second mounting base, a second stud, and a second nut. The second mounting base is fixed on the axial first end face of the turntable, and the second stud is vertically installed on the axial first end face of the turntable. One end of the second straight plate is hinged to the second mounting base, and the other end is provided with a conical tip. A hole is opened on the second straight plate and between the conical tip and the hinge point between the second straight plate and the second mounting base. The second straight plate is sleeved on the second stud through the hole and limited by the second nut. The end of the fixed tip is conical.

[0008] A method for machining flattened blades with dual-axis journals, employing the aforementioned flattening positioning device and a three-axis vertical CNC milling machine, and comprising: The upper and lower journals of the double-jersey blade are clamped respectively through the first and third V-grooves, and the second and fourth V-grooves of the V-locking device. The fixed center in the positioning point locking device positions the positioning point on the blade back side, and the movable center presses and positions the blade head side. The first nut on the first stud and the second nut on the second stud are then locked to fix the double-jersey blade. Rotating the turntable makes the Z-axis of the double-jersey blade parallel to the Z-axis of the three-axis vertical CNC milling machine. It should be noted that the Z-axis of the three-axis vertical CNC milling machine refers to the spindle direction of the milling cutter.

[0009] Furthermore, the method for machining the flattened blade of the double journal also includes using the end face of the upper journal boss as a reference, obtaining the coordinates of the center of the upper journal by means of a lever dial indicator and inputting them into the machining coordinate system, and then cutting the flattened blade of the double journal along the Z-axis direction with a milling cutter.

[0010] Compared with existing clamping methods, this invention eliminates part deformation caused by the center by clamping the upper and lower journals, solves the problem of the blade positioning point deviating from the initial positioning position during the machining process, and transforms the requirement of large stroke equipment for flat machining into the requirement of Z-axis stroke by changing the machining direction, thus eliminating the equipment bottleneck problem, expanding the application range of machining equipment, and eliminating the need to rely on large stroke four-axis vertical CNC milling equipment. The machining of double journal blade flatness can be realized on a regular three-axis vertical CNC milling machine. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the dual-axis journal blade flattening positioning device of the present invention; Figure 2 This is a schematic diagram of the upper and lower journal V-shaped locking device of the present invention; Figure 3 This is a schematic diagram of the positioning point locking device of the present invention; Figure 4 This refers to the flattening position of the double-jersey blade and the end face of the upper journal boss in this invention. Figure 5 This is a rear view of the channel steel base; Figure 6 Model diagram of a positioning device for flattening double-axis journal blades; In the figure, 1-turntable, 2-V-type locking device, 3-positioning point locking device, 4-double-axis journal blade, 21-movable clamping block, 22-fixed clamping block, 31-movable center, 32-fixed center. Detailed Implementation

[0012] The present invention will be further described below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0013] like Figure 1 and Figure 6As shown, this invention designs a positioning device for flattening a double-journal blade, mainly composed of a turntable 1, a V-shaped locking device 2, and a positioning point locking device 3. The turntable 1 is a circular disc with a rotating shaft at its center, and the turntable 1 is rotatably connected to the rotating shaft. The V-shaped locking device 2 is disposed on the first axial end face of the turntable 1. The V-shaped locking device 2 includes a movable clamping block 21 and a fixed clamping block 22. The movable clamping block 21 is hinged to the first axial end face of the turntable 1, and the fixed clamping block 22 is fixedly installed on the first axial end face of the turntable 1. The movable clamping block 21 includes a first V-shaped groove and a second V-shaped groove spaced apart, and the fixed clamping block 22 includes a third V-shaped groove and a fourth V-shaped groove spaced apart. The openings of the first V-shaped groove and the third V-shaped groove are opposite each other and are used for clamping the upper journal of the double-journal blade 4, and the openings of the second V-shaped groove and the fourth V-shaped groove are opposite each other and are used for clamping the lower journal of the double-journal blade 4. The positioning point locking device 3 is set on the first axial end face of the turntable 1. The positioning point locking device 3 includes a movable center 31 and a fixed center 32. The movable center 31 is hinged to the first axial end face of the turntable 1, and the fixed center 32 is vertically installed on the first axial end face of the turntable 1.

[0014] like Figure 5 The dual-axis journal blade flattening positioning device also includes a channel steel base, with one end of the rotating shaft fixed to the non-groove end face of the channel steel base (i.e., Figure 1 The lower left end face of the channel steel base) is also equipped with two triangular reinforcing ribs inside the groove side of the channel steel base to improve the stability of the positioning device.

[0015] The movable clamping block 21 includes a first straight plate, a first channel steel, a first mounting base, a first stud, and a first nut. The first mounting base is fixed on the axial first end face of the turntable 1. The first stud is vertically installed on the axial first end face of the turntable 1. One end of the first straight plate is hinged to the first mounting base, and the other end is opened and sleeved on the first stud through the hole and limited by the first nut. The first straight plate is vertically connected to the bottom plate of the first channel steel. The ends of the two parallel side plates of the first channel steel are respectively opened with a first V-shaped groove and a second V-shaped groove. The fixed clamping block 22 includes a second channel steel. The ends of the two parallel side plates of the second channel steel are respectively opened with a third V-shaped groove and a fourth V-shaped groove. The bottom plate of the second channel steel is fixed on the axial first end face of the turntable 1.

[0016] The movable tip 31 includes a second straight plate, a second mounting base, a second stud, and a second nut. The second mounting base is fixed to the axial first end face of the turntable 1. The second stud is vertically mounted on the axial first end face of the turntable 1. One end of the second straight plate is hinged to the second mounting base, and the other end is provided with a conical tip. A hole is opened on the second straight plate and between the conical tip and the hinge point between the second straight plate and the second mounting base. The second straight plate is sleeved on the second stud through this hole and limited by the second nut. The end of the fixed tip 32 is conical.

[0017] This invention uses a V-shaped locking device 2 to clamp the upper and lower journals. Using the upper journal boss end face as a reference, the blade is positioned using a positioning point. A positioning point locking device 3 is added on the other side of the positioning point to ensure that the blade and the positioning point of the flat machining positioning device remain in contact during processing. The V-shaped locking device 2, the positioning point locking device 3, and the double-journal blade 4 are fixed on a rotatable turntable 1, enabling vertical machining of the flat blade. This transforms the requirement for a large-stroke four-axis vertical CNC milling machine into the requirement for the Z-axis travel of a three-axis vertical CNC milling machine, eliminating equipment bottlenecks.

[0018] The specific process for processing the flattened part is as follows: 1. Rotate turntable 1 to the vertical position, and respectively insert the upper and lower journals of the double-journal blade 4 into the clamping area formed by the first and third V-grooves above, and the clamping area formed by the second and fourth V-grooves below, as shown. Figure 1 , 2 As shown ( Figure 2 The image shows the state in which the upper and lower journals are clamped. Tighten the first nut on the V-locking device 2 appropriately to fix the double journal blade 4 and allow it to rotate around the axis centerline (here referring to the axis centerline of the double journal blade 4). 2. For example Figure 3 As shown, the upper journal boss end face of the double journal blade 4 (as shown) Figure 4 At the same time, the inner end face of the first channel steel side plate where the first V-groove is located and the inner end face of the second channel steel side plate where the third V-groove is located are closely attached to each other. The double-axis blade 4 is rotated around its own axis so that the blade back positioning point of the double-axis blade 4 is in contact with the conical end positioning point of the fixed tip 32 on the turntable 1. The second nut on the positioning point locking device 3 is tightened so that the blade back positioning point is in close contact with the conical tip positioning point of the movable tip 31. 3. Tighten the first nut of the V-type locking device 2 to fix the double journal blade 4 so that it cannot slide up or down or rotate around its own axis. Determine the coordinates of the center of the upper journal by using a lever dial indicator and input the coordinate system to start machining the flat part at the upper journal. The milling cutter cuts along the Z-axis of the three-axis vertical CNC milling machine to complete the machining of the flat part.

[0019] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A positioning device for flattening double-journey blades, characterized in that, include: Turntable (1), the turntable (1) is a disc, the center of the disc is a rotating shaft, and the turntable (1) is rotatably connected to the rotating shaft; V-shaped locking device (2), the V-shaped locking device (2) is set on the first axial end face of the turntable (1), the V-shaped locking device (2) includes a movable clamping block (21) and a fixed clamping block (22), the movable clamping block (21) is hinged to the first axial end face of the turntable (1), the fixed clamping block (22) is fixedly installed on the first axial end face of the turntable (1), the movable clamping block (21) includes a first V-shaped groove and a second V-shaped groove distributed at intervals, the fixed clamping block (22) includes a third V-shaped groove and a fourth V-shaped groove distributed at intervals, the openings of the first V-shaped groove and the third V-shaped groove are opposite to each other and are used for clamping the upper journal of the double journal blade (4), the openings of the second V-shaped groove and the fourth V-shaped groove are opposite to each other and are used for clamping the lower journal of the double journal blade (4); The positioning point locking device (3) is set on the first axial end face of the turntable (1). The positioning point locking device (3) includes a movable tip (31) and a fixed tip (32). The movable tip (31) is hinged to the first axial end face of the turntable (1), and the fixed tip (32) is vertically installed on the first axial end face of the turntable (1). The movable clamping block (21) includes a first straight plate, a first channel steel, a first mounting base, a first stud and a first nut. The first mounting base is fixed on the first axial end face of the turntable (1). The first stud is vertically installed on the first axial end face of the turntable (1). One end of the first straight plate is hinged to the first mounting base. The other end has a first hole and is sleeved on the first stud through the first hole and limited by the first nut. The first straight plate is vertically connected to the bottom plate of the first channel steel. The ends of the two parallel side plates of the first channel steel are respectively opened with a first V-shaped groove and a second V-shaped groove. The fixed clamping block (22) includes a second channel steel. The ends of the two parallel side plates of the second channel steel are respectively opened with a third V-shaped groove and a fourth V-shaped groove. The bottom plate of the second channel steel is fixed on the first axial end face of the turntable (1). The movable tip (31) includes a second straight plate, a second mounting base, a second stud, and a second nut. The second mounting base is fixed on the axial first end face of the turntable (1). The second stud is vertically installed on the axial first end face of the turntable (1). One end of the second straight plate is hinged to the second mounting base, and the other end is provided with a conical tip. A second hole is opened on the second straight plate and between the conical tip and the hinge point between the second straight plate and the second mounting base. The second straight plate is sleeved on the second stud through the second hole and limited by the second nut. The end of the fixed tip (32) is conical.

2. The positioning device for flattening double-journey blades according to claim 1, characterized in that: It also includes a channel steel base, with one end of the rotating shaft fixed to the non-groove end face of the channel steel base.

3. A method for flattening a double-journey blade, characterized in that: The flat machining positioning device and the three-axis vertical CNC milling machine described in claim 1 are employed, and include: The upper and lower journals of the double-jersey blade (4) are clamped by the first V-groove and the third V-groove, the second V-groove and the fourth V-groove of the V-locking device (2), respectively. The fixed center (32) in the positioning point locking device (3) is used to position the positioning point on the back side of the blade. The positioning point is pressed and positioned by the movable center (31) on the blade basin side. The first nut on the first stud and the second nut on the second stud are locked to fix the double-jersey blade (4). The turntable (1) is rotated so that the Z-axis of the double-jersey blade (4) is parallel to the Z-axis of the three-axis vertical CNC milling machine.

4. The method for flattening a double-journey blade according to claim 3, characterized in that: It also includes using the end face of the upper journal boss as a reference, obtaining the coordinates of the center of the upper journal through a lever dial indicator and inputting them into the machining coordinate system, and the milling cutter cutting the flat surface on the double journal blade (4) along the Z-axis direction.

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