Clamping device for milling double-journal blade and milling machine

Abstract

The utility model discloses a clamping device for milling a double-journal blade, namely a milling machine. The clamping device comprises a base, a fixed assembly, a rotating assembly and a tensioning assembly, the base is provided with a mounting hole, and the fixing assembly and the tensioning assembly are arranged on the two axial sides of the mounting hole respectively. The two first bearings of the rotating assembly are perpendicular to the axis of the mounting hole. The first shaft section is located in the mounting hole, and the two first bearings are connected to the first shaft section in a sleeving mode; the outer diameter of the first bearing is equal to the shaft diameter of the mounting hole, and the shaft diameter of the second shaft section is smaller than that of the first shaft section; the tensioning assembly is provided with an axis, a tensioning bolt, a second bearing, an annular base plate and an annular cover plate, the second shaft section is sleeved with the second bearing, the second shaft section is sleeved with the base plate and the cover plate, and the tensioning bolt is in threaded connection with the second shaft section; the outer diameters of the base plate and the cover plate are larger than the shaft diameter of the mounting hole. According to the double-journal blade machining tool, the double-journal blade can be prevented from deforming in the machining process, and the machining size of the double-journal blade is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of blade processing technology, and in particular to a clamping device and milling machine for milling double-judge blades. Background Technology

[0002] A double-journal blade is a special type of aero-engine blade with two journals. This design provides greater stability and precision during installation and positioning. Double-journal blades are widely used in turbofan engines, especially in the design of rectifier blades, because they can effectively guide airflow, reduce drag, and improve engine performance.

[0003] Due to the complex geometry and high precision requirements of double-journal blades, the machining process is very complex, typically employing multi-axis, high-precision CNC milling machines. During machining, the double-journal blade is usually placed horizontally, with one journal clamped using a four-axis milling machine and the other journal held in place by a tailstock center to fix its machining shape.

[0004] However, for double-jersey blades with poor rigidity, after being fixed by a four-axis milling machine and a center, the double-jersey blade will undergo slight deformation in the vertical direction due to gravity. The middle part will shift downward, which will cause the tool to deflect easily when machining the blade to the middle section of the blade shape, thus affecting the machining dimensions of the double-jersey blade. Utility Model Content

[0005] Therefore, it is necessary to provide a clamping device and milling machine for milling double-jersey blades to address the above-mentioned technical problems, which can prevent deformation of the double-jersey blades during the machining process and ensure the machining dimensions of the double-jersey blades.

[0006] In a first aspect, this utility model provides a clamping device for milling double-journal blades, including a base, a fixing assembly for fixing the journals of the double-journal blades, a rotating assembly, and a tensioning assembly;

[0007] The base is provided with a mounting hole that penetrates the base, and the fixing component and the tensioning component are respectively provided on both sides of the mounting hole along the axial direction;

[0008] The rotating assembly is provided with a rotating shaft, a rotating disk and two first bearings. The two first bearings are fixedly assembled at both ends inside the mounting hole, and the first bearings are perpendicular to the axis of the mounting hole.

[0009] The rotating shaft includes a first shaft section and a second shaft section. The first shaft section is located inside the mounting hole, and two first bearings are sleeved on the first shaft section. The outer diameter of the first bearings is equal to the shaft diameter of the mounting hole. The second shaft section is located at the end of the first shaft section near the tensioning assembly. The second shaft section is integrally connected to the first shaft section, and the shaft diameter of the second shaft section is smaller than that of the first shaft section.

[0010] The rotating disc is fixedly connected to one end of the first shaft segment close to the fixing assembly, and the first shaft segment is fixedly connected to the center of the rotating disc perpendicularly;

[0011] The tension assembly is sequentially and closely connected with the tension bolt, the second bearing, the annular gasket plate and the annular cover plate in the direction from the tension assembly to the fixing assembly, the axis of the tension bolt coincides with the axis of the fixing hole, the second bearing is sleeved on the second shaft segment, the gasket plate and the cover plate are both sleeved on the second shaft segment, and the tension bolt is threadedly connected with the second shaft segment.

[0012] The outer diameters of the gasket plate and the cover plate are greater than the shaft diameter of the mounting hole, and the inner diameters of the gasket plate and the cover plate are greater than the shaft diameter of the second shaft segment and smaller than the shaft diameter of the mounting hole.

[0013] In one of the embodiments, the base comprises a bottom plate and a support plate fixed perpendicularly above the bottom plate, and the mounting hole is arranged on the support plate.

[0014] In one of the embodiments, the fixing assembly is provided with a fixing disc, two fixing bolts, a first U-shaped fixing piece, a second U-shaped fixing piece and a thimble for positioning the double-journal vane.

[0015] The fixing disc is circular, the center of the fixing disc is provided with a positioning hole, the thimble is fixedly installed in the positioning hole, and the needle tip of the thimble is directed away from the fixing disc and coincides with the axis of the mounting hole.

[0016] The first U-shaped fixing piece and the second U-shaped fixing piece are fixedly connected with the fixing disc, and the fixing disc is coaxially fixedly connected with the rotating disc.

[0017] The openings of the first U-shaped fixing piece and the second U-shaped fixing piece are opposite to each other, and the thimble is located in the middle of the openings of the first U-shaped fixing piece and the second U-shaped fixing piece.

[0018] The first U-shaped fixing piece and the second U-shaped fixing piece are both provided with two fixing holes penetrating one end away from the fixing disc, and the two fixing holes of the first U-shaped fixing piece are vertically aligned with the two fixing holes of the second U-shaped fixing piece.

[0019] Each two vertically aligned fixing holes form a group, and one fixing bolt is threadedly connected in each group of fixing holes.

[0020] In one of the embodiments, the spacing between the first U-shaped fixing piece and the second U-shaped fixing piece is greater than or equal to 3 mm and less than or equal to 5 mm.

[0021] In the second aspect, the utility model also provides a milling machine with the above-mentioned clamping device for double-journal vane milling, and the base of the clamping device is horizontally fixedly assembled on the milling machine workbench, and the needle tip of the thimble of the clamping device is directed towards the four-axis of the milling machine.

[0022] The utility model discloses a beneficial effect: the fixed assembly of the utility model can fix one end axle neck of double axle neck vane, cooperate with the four axle of milling machine and fix the other end axle neck, then through the tightening bolt, the fixed assembly is tightened to the tightening assembly direction, and then realizes the tightening of double axle neck vane, can eliminate the slight deformation of double axle neck vane in the vertical direction caused by gravity, and then avoids letting the knife, guarantees the processing size of double axle neck vane. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The utility model discloses a whole structure schematic diagram of clamping device for double axle neck vane milling processing for the embodiment of the utility model provides;

[0024] Figure 2 For Figure 1 Another angle structure schematic diagram;

[0025] Figure 3 For Figure 2 Along the section structure schematic diagram of AA surface;

[0026] Figure 4 The utility model discloses an assembly relationship schematic diagram of rotating shaft and rotating disc for the embodiment of the utility model provides;

[0027] Figure 5 The utility model discloses a structure schematic diagram of base for the embodiment of the utility model provides;

[0028] Figure 6 The utility model discloses a structure schematic diagram of fixed assembly for the embodiment of the utility model provides;

[0029] Figure 7 The utility model discloses an assembly relationship schematic diagram of clamping device and milling machine for the embodiment of the utility model provides.

[0030] The utility model discloses a whole structure schematic diagram of clamping device for double axle neck vane milling processing for the embodiment of the utility model provides; DETAILED DESCRIPTION

[0031] In order to make the above -mentioned purpose, feature and advantage of the utility model more obvious and easy to understand, the specific embodiment of the utility model is explained in detail below.

[0032] It should be noted that in the description of the utility model, "upper", "lower", "top", "bottom", orientation or positional relationship is based on the drawings attached Figure 1 It should be understood that these orientation terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0033] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , the embodiment provides a clamping device for double-journal vane milling, which comprises a base 100, a fixing assembly 200 for fixing the shaft journal of a double-journal vane, a rotating assembly 300 and a tensioning assembly 400.

[0034] The base 100 is provided with a mounting hole 110 penetrating through the base 100, and the fixing assembly 200 and the tensioning assembly 400 are arranged on the two axial sides of the mounting hole 110 respectively.

[0035] The rotating assembly 300 is provided with a rotating shaft 310, a rotating disc 320 and two first bearings 330, the two first bearings 330 are fixedly assembled at the two ends inside the mounting hole 110 respectively, and the first bearing 330 is perpendicular to the axis of the mounting hole 110.

[0036] As shown in Figure 4 , the rotating shaft 310 comprises a first shaft section 311 and a second shaft section 312, the first shaft section 311 is located inside the mounting hole 110, the two first bearings 330 are sleeved on the first shaft section 311, the outer diameter of the first bearing 330 is equal to the shaft diameter of the mounting hole 110, the second shaft section 312 is arranged at one end of the first shaft section 311 close to the tensioning assembly 400, the second shaft section 312 is integrally connected with the first shaft section 311, and the shaft diameter of the second shaft section 312 is smaller than that of the first shaft section 311; the rotating disc 320 is fixedly connected at one end of the first shaft section 311 close to the fixing assembly 200, and the first shaft section 311 is fixedly connected perpendicularly at the center of the rotating disc 320.

[0037] The inner diameter of the first bearing 330 is smaller than the inner diameter of the mounting hole 110, so that the rotating shaft 310 sleeved inside the first bearing 330 can rotate in the mounting hole 110.

[0038] Specifically, the first shaft section 311 in the embodiment can rotate along the axis of the mounting hole 110, so that the second shaft section 312 and the rotating disc 320 connected at the two ends of the first shaft section 311 can also rotate around the axis of the mounting hole 110.

[0039] The tensioning assembly 400 is sequentially and closely connected with the tensioning bolt 410, the second bearing 420, the annular gasket plate 430 and the annular cover plate 440 in the direction from the tensioning assembly 400 to the fixing assembly 200, the axis of the tensioning bolt 410 coincides with the axis of the fixing hole 250, the second bearing 420 is sleeved on the second shaft segment 312, the gasket plate 430 and the cover plate 440 are both sleeved on the second shaft segment 312, and the tensioning bolt 410 is threadedly connected with the second shaft segment 312.

[0040] Specifically, the cover plate 440 is used for shaft sealing, and the gasket plate is used for avoiding abrasion of the cover plate 440 caused by the second bearing 420 during the tensioning process.

[0041] The outer diameters of the gasket plate 430 and the cover plate 440 are greater than the shaft diameter of the mounting hole 110, and the inner diameters of the gasket plate 430 and the cover plate 440 are greater than the shaft diameter of the second shaft segment 312 and less than the shaft diameter of the mounting hole 110. The inner diameters of the gasket plate 430 and the cover plate 440 are greater than the shaft diameter of the second shaft segment 312, so that the gasket plate 430 and the cover plate 440 do not affect the rotation of the second shaft segment 312, and the rotation of the connecting shaft can be ensured to be smooth.

[0042] In the embodiment, the second bearing 420, the gasket plate 430 and the cover plate 440 are in close abutment, when the tensioning bolt 410 is tightened, the rotating shaft 310 can be axially displaced towards the tensioning assembly 400, thereby driving the fixing assembly 200 to be axially displaced towards the tensioning assembly 400, a tension is formed between the fixing assembly 200 and the milling machine four-shaft 510, the double-axle neck blade to be machined is tensioned, deformation of the blade is avoided or eliminated, and the machining problem of the double-axle neck blade with poor rigidity during milling is solved.

[0043] In one of the embodiments, as shown in Figure 5 the base 100 includes a bottom plate 120 and a support plate 130 vertically fixed above the bottom plate 120, and the mounting hole 110 is arranged on the support plate 130.

[0044] In one of the embodiments, as shown in Figure 6 the fixing assembly 200 is provided with a fixing disc 210, two fixing bolts, a first U-shaped fixing piece 220, a second U-shaped fixing piece 230 and a top pin 240 for positioning the double-axle neck blade.

[0045] The fixing disc 210 is circular, the fixing disc 210 is provided with a positioning hole in the center, the top pin 240 is fixedly installed on the positioning hole, and the needle tip of the top pin 240 is directed to the side away from the fixing disc 210 and coincides with the axis of the mounting hole 110.

[0046] The top pin 240 is used for abutting with the center hole on the shaft neck of the double-axle neck blade, so as to realize accurate positioning of the double-axle neck blade.

[0047] In the embodiment, the first U-shaped fixing member 220 and the second U-shaped fixing member 230 are fixedly connected with the fixing disc 210, the fixing disc 210 is coaxially fixedly connected with the rotating disc 320; the openings of the first U-shaped fixing member 220 and the second U-shaped fixing member 230 are opposite, the ejector pin 240 is located in the middle of the openings of the first U-shaped fixing member 220 and the second U-shaped fixing member 230; two fixing holes 250 are arranged at the ends of the first U-shaped fixing member 220 and the second U-shaped fixing member 230 away from the fixing disc 210, the two fixing holes 250 of the first U-shaped fixing member 220 are vertically aligned with the two fixing holes 250 of the second U-shaped fixing member 230; each two vertically aligned fixing holes 250 form a group, and one fixing bolt is threadedly connected in each group of fixing holes 250.

[0048] Specifically, the distance between the first U-shaped fixing member 220 and the second U-shaped fixing member 230 is greater than or equal to 3 mm and less than or equal to 5 mm.

[0049] The openings of the first U-shaped fixing member 220 and the second U-shaped fixing member 230 are opposite, and the space formed in the middle is used for placing the shaft neck of the double-shaft-neck blade. After the blade shaft neck is placed, the fixing bolt can be tightened to reduce the distance between the first U-shaped fixing member 220 and the second U-shaped fixing member 230, so as to clamp and fix the double-shaft-neck blade.

[0050] It should be noted that the clamping device for double-shaft-neck blade milling in the embodiment is also suitable for milling of other double-shaft-neck parts.

[0051] Based on the same utility model creation, in one embodiment, a milling machine is provided, which has the clamping device for double-shaft-neck blade milling described in any one of the above embodiments. As shown in Figure 7 The base 100 of the clamping device is horizontally fixedly assembled on the milling machine workbench 500, and the needle tip direction of the ejector pin 240 of the clamping device faces the milling machine four-axis 510.

[0052] The milling machine in the embodiment has the clamping device for double-shaft-neck blade milling, which can cooperate with the four-axis to fix and tension the double-shaft-neck blade to be processed, so as to eliminate the slight deformation of the double-shaft-neck blade in the vertical direction caused by gravity, thereby avoiding tool breaking and ensuring the processing size of the double-shaft-neck blade.

[0053] The above-described embodiments only express several implementation manners of the utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the patent scope of the utility model. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the appended claims.

Claims

1. A clamping device for double-tapered vane milling, characterized in that, The base (100), the fixing assembly (200) for fixing the double shaft neck vane shaft neck, the rotating assembly (300) and the tensioning assembly (400) are included. The base (100) is provided with a mounting hole (110) penetrating through the base (100), and the fixing assembly (200) and the tensioning assembly (400) are arranged on the two axial sides of the mounting hole (110) respectively. The rotating assembly (300) is provided with a rotating shaft (310), a rotating disc (320) and two first bearings (330), the two first bearings (330) are fixedly assembled at the two ends of the inside of the mounting hole (110) respectively, and the first bearing (330) is perpendicular to the axis of the mounting hole (110). The rotating shaft (310) includes a first shaft section (311) and a second shaft section (312), the first shaft section (311) is located in the mounting hole (110), the two first bearings (330) are sleeved on the first shaft section (311), the outer diameter of the first bearing (330) is equal to the shaft diameter of the mounting hole (110), the second shaft section (312) is arranged at one end of the first shaft section (311) close to the tensioning assembly (400), the second shaft section (312) is integrally connected with the first shaft section (311), and the shaft diameter of the second shaft section (312) is smaller than that of the first shaft section (311). The rotating disc (320) is fixedly connected to one end of the first shaft section (311) close to the fixing assembly (200), and the first shaft section (311) is fixedly connected to the center of the rotating disc (320) perpendicularly. The tensioning assembly (400) is sequentially and closely connected with a tensioning bolt (410), a second bearing (420), an annular gasket (430) and an annular cover plate (440) in the direction from the tensioning assembly (400) to the fixing assembly (200), the axis of the tensioning bolt (410) coincides with the axis of the fixing hole (250), the second bearing (420) is sleeved on the second shaft section (312), the gasket (430) and the cover plate (440) are both sleeved on the second shaft section (312), and the tensioning bolt (410) is threadedly connected with the second shaft section (312). The outer diameters of the gasket (430) and the cover plate (440) are both greater than the shaft diameter of the mounting hole (110), and the inner diameters of the gasket (430) and the cover plate (440) are greater than the shaft diameter of the second shaft section (312) and smaller than the shaft diameter of the mounting hole (110).

2. The clamping device for double-chin vane milling according to claim 1, characterized in that, The base (100) includes a bottom plate (120) and a support plate (130) fixed perpendicularly above the bottom plate (120), and the mounting hole (110) is arranged on the support plate (130).

3. The clamping device for double-chin vane milling according to claim 2, characterized in that, The fixing assembly (200) is provided with a fixing disc (210), two fixing bolts, a first U-shaped fixing piece (220), a second U-shaped fixing piece (230) and a thimble (240) for positioning the double shaft neck vane. The fixing disc (210) is circular, a positioning hole is arranged at the center of the fixing disc (210), the thimble (240) is fixedly installed in the positioning hole, the thimble (240) is directed to a side away from the fixing disc (210) and coincides with the axis of the mounting hole (110); The first U-shaped fixing part (220) and the second U-shaped fixing part (230) are fixedly connected with the fixing disc (210), and the fixing disc (210) is coaxially fixedly connected with the rotating disc (320); The openings of the first U-shaped fixing part (220) and the second U-shaped fixing part (230) are opposite, and the thimble (240) is located in the middle of the openings of the first U-shaped fixing part (220) and the second U-shaped fixing part (230); Two fixing holes (250) are arranged at the end of the first U-shaped fixing part (220) and the second U-shaped fixing part (230) away from the fixing disc (210), the two fixing holes (250) of the first U-shaped fixing part (220) are respectively vertically aligned with the two fixing holes (250) of the second U-shaped fixing part (230); Every two vertically aligned fixing holes (250) form a group, and a fixing bolt is threadedly connected in each group of fixing holes (250).

4. The clamping device for double-tapered vane milling according to claim 3, characterized in that, The spacing between the first U-shaped fixing part (220) and the second U-shaped fixing part (230) is greater than or equal to 3 mm and less than or equal to 5 mm.

5. A milling machine for double-tapered vane milling, characterized by, The clamping device for double shaft neck blade milling has the base (100) horizontally fixedly assembled on the milling machine workbench (500), and the thimble (240) is directed to the milling machine four-axis (510).

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