Rotary fixture of milling machine

Abstract

The utility model belongs to the technical field of aero-engine part machining, and particularly relates to a milling machine rotary clamp which comprises a base used for fixing a workpiece on a machine tool and an orientation panel used for adjusting a flange seat at the machining position of the workpiece to be coaxial with a machining center of the machine tool. A rotary disc for driving a workpiece to rotate is arranged on the side plate, a shaft core for enabling the workpiece and the rotary disc to be concentric is arranged between the rotary disc and the side plate, and a positioning pin for positioning angles of the rotary disc and the workpiece on the side plate is arranged between the side plate and the rotary disc. A positioning bolt for fixing the side plate on the rotary disc is also arranged between the side plate and the rotary disc; the fixture which is simple in structure and low in cost is matched with the three-axis machine tool, so that the flexibility of five-axis machining is achieved, the cost is effectively controlled, and the machining efficiency can be guaranteed; the clamping device further has the advantages of being accurate in positioning, stable in clamping and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation engine parts processing, and in particular relates to a rotary clamp for a milling machine. Background Art

[0002] The aircraft engine is a highly complex and sophisticated thermal machine. As the heart of an aircraft, it is not only the driving force for the aircraft to fly, but also an important driving force for the development of aviation. Every important change in the history of human aviation is inseparable from the technological progress of aircraft engines.

[0003] As shown in the attached figure, this part is a rear end cap of an aerospace engine gas tank, with a maximum outer diameter of 840mm, an elliptical wall thickness of 5mm, and four axial 30° flanged air inlets on the outside. Turning can only remove the rotary surface allowance. The part is characterized by a large flange and a small throat diameter, which makes it difficult to process. The tool path interference in processing can only be achieved on a large five-axis machining center, which has high equipment costs and leads to high processing costs.

[0004] In order to solve the above problems, a fixture which can be equipped and rotated by using an existing 3-axis machining center is proposed. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model provides a rotary clamp for a milling machine, which has the characteristics of low cost and stable clamping.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a milling machine rotary clamp, comprising a base for fixing a workpiece on a machine tool and an orienting panel for adjusting a flange seat for a processing position of the workpiece to be coaxial with a machining center of the machine tool, a side panel is fixedly provided on the orienting panel, a turntable for driving the workpiece to rotate is provided on the side panel, an axis core for making the workpiece and the turntable concentric is provided between the turntable and the side panel, a positioning pin for positioning the turntable and the workpiece on the side panel is provided between the side panel and the turntable, and a positioning bolt for fixing the side panel on the turntable is also provided between the side panel and the turntable.

[0007] As a preferred technical solution of the utility model, the turntable is provided with a fixed clamping block that can clamp the outer wall of the workpiece. The fixed clamping block is fixed to the turntable by bolts and clamps the periphery of the workpiece. There are several fixed clamping blocks equidistantly distributed around the external path of the workpiece.

[0008] As a preferred technical solution of the utility model, the upper end of the shaft core is located at the top of the turntable and is provided with a limit plate, the lower end of the shaft core passes through the turntable and the side plate at the same time, and a pressure plate is fixed at the bottom by bolts, and the turntable rotates on the upper end of the side plate through the cooperation of the shaft core and the pressure plate.

[0009] As a preferred technical solution of the utility model, a positioning hole which is engaged with the positioning pin is provided on the side panel, and four positioning holes which are equidistantly distributed around the circumference are provided on the turntable. The positioning hole on the turntable can be coaxial with the positioning hole on the positioning pin, and the positioning pin engages two coaxial positioning holes at the same time.

[0010] As a preferred technical solution of the utility model, there are four positioning bolts distributed in a circle, and four connecting holes matching with the four positioning bolts are provided on the side plate and the turntable, and the turntable is fixed on the side plate by the connection of the positioning bolts.

[0011] As a preferred technical solution of the present utility model, the base is fixed to the directional panel by bolts, and the side panel is also fixed to the directional panel by bolts.

[0012] Compared with the prior art, the beneficial effects of the present invention are: utilizing a fixture with a simple structure and low cost in conjunction with a 3-axis machine tool to achieve the flexibility of 5-axis machining, effectively controlling costs and ensuring machining efficiency; the present invention also has the advantages of accurate positioning and stable clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 For the utility model Figure 1 A schematic diagram of the structure looking down and facing the axis of the workpiece;

[0016] In the figure: 1. base; 2. directional panel; 3. side panel; 4. turntable; 5. shaft core; 6. pressure plate; 7. fixing clamp; 8. positioning hole; 9. positioning pin; 10. positioning bolt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Example

[0019] See also Figure 1-2The utility model provides the following technical solutions: a rotary fixture for a milling machine, comprising a base 1 for fixing a workpiece on a machine tool and an orientation panel 2 for adjusting a flange seat for a machining position of the workpiece to be coaxial with a machining center of the machine tool, a side panel 3 is fixedly arranged on the orientation panel 2, a turntable 4 for driving the workpiece to rotate is arranged on the side panel 3, an axis 5 for making the workpiece and the turntable 4 concentric is arranged between the turntable 4 and the side panel 3, a positioning pin 9 for positioning the turntable 4 and the workpiece on the side panel 3 at a positioning angle is arranged between the side panel 3 and the turntable 4, and a positioning bolt 10 for fixing the side panel 3 on the turntable 4 is also arranged between the side panel 3 and the turntable 4.

[0020] Specifically, the turntable 4 is provided with a fixed clamping block 7 that can be clamped with the outer wall of the workpiece. The fixed clamping block 7 is fixed to the turntable 4 by bolts and clamps the periphery of the workpiece. There are several fixed clamping blocks 7 distributed equidistantly around the external path of the workpiece. In this embodiment, the fixed clamping block 7 is used to fix the workpiece on the turntable 4, and multiple fixed clamping blocks arranged on the circumference are used for positioning the workpiece to ensure that the center of the machine tool is accurately matched after the workpiece is positioned on the fixture.

[0021] Specifically, the upper end of the shaft core 5 is located at the top of the turntable 4 and is provided with a limit plate. The lower end of the shaft core 5 passes through the turntable 4 and the side plate 3 at the same time, and a pressure plate 6 is fixed at the bottom by bolts. The turntable 4 rotates on the upper end of the side plate 3 through the cooperation of the shaft core 5 and the pressure plate 6. In this embodiment, the shaft core 5 and the pressure plate 6 have a simple structure and can ensure the stability of the rotation of the turntable 4 on the side plate 3. Lubricating oil is applied at the connection to ensure the flexibility of the turntable 4.

[0022] Specifically, a positioning hole 8 which is inserted into the positioning pin 9 is opened on the side plate 3, and four positioning holes 8 which are equidistantly distributed around the circumference are opened on the turntable 4. The positioning hole 8 on the turntable 4 can be coaxial with the positioning hole 8 on the positioning pin 9, and the positioning pin 9 simultaneously inserts the two coaxial positioning holes 8. In this embodiment, the positioning holes 8 and the positioning pins 9 are used to quickly position the turntable 4 and the workpiece on the side plate 3, and the number is the same as the position of the workpiece to be processed. The structure is simple and the operation is convenient.

[0023] Specifically, there are four positioning bolts 10 distributed in a circle, and four connecting holes matching with the four positioning bolts 10 are opened on the side plate 3 and the turntable 4. The turntable 4 is fixed on the side plate 3 by the connection of the positioning bolts 10. In this embodiment, the turntable 4 is locked on the side plate 3 by multiple positioning bolts 10, which effectively ensures the stability of the turntable 4 and the workpiece after rotation, and ensures the reliability during workpiece processing.

[0024] Specifically, the base 1 and the directional panel 2 are fixed by bolts, and the side panel 3 and the directional panel 2 are also fixed by bolts.

[0025] The working principle and use process of the utility model are as follows: first, the fixture is installed on the workbench of the 3-axis machining machine tool, the reference hole is aligned and leveled, the center hole is aligned, the workpiece coordinate system is determined, and the fixture is tightened and fixed by bolts; the positioning surface of the turntable 4 is cleaned, the positioning surface of the workpiece is also cleaned, and it is placed on the turntable 4, and then the workpiece is positioned on the turntable 4 through multiple fixed clamps 7 with bolts. After adjusting the workpiece, the pressure plate 6 and the shaft core 5 are pressed by bolts, and the screws connected to the side plate 3 on the turntable 4 are tightened. The tool is aligned and the machine tool is started for processing according to the procedure; after the first flange seat is processed, the screws connecting the turntable 4 and the side plate 3 are loosened and taken out, and the positioning pins 9 are pulled out from the positioning holes 8 in the side plate 3 and the turntable 4. The workpiece is rotated to drive the turntable 4 to rotate at the same time. After rotating 90°, the positioning pins are inserted to fix the position, and the 4 screws are tightened again in the side plate 3 and the turntable 4. The processing is repeated 4 times in this way. After the parts are processed, the product can be unloaded.

[0026] In order to ensure the flexibility of the side plate 3 and the turntable 4 during the processing, lubricating oil is added to their contact surfaces.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotary fixture for a milling machine, characterized in that: The invention comprises a base (1) for fixing a workpiece on a machine tool and an orientation panel (2) for adjusting a flange seat of a workpiece processing position to be coaxial with a machining center of the machine tool, a side panel (3) being fixedly arranged on the orientation panel (2), a rotating disk (4) for driving the workpiece to rotate being arranged on the side panel (3), an axis (5) for making the workpiece and the rotating disk (4) concentric being arranged between the rotating disk (4) and the side panel (3), a positioning pin (9) for positioning the rotating disk (4) and the workpiece on the side panel (3) at a positioning angle being arranged between the side panel (3) and the rotating disk (4), and a positioning bolt (10) for fixing the side panel (3) on the rotating disk (4) being arranged between the side panel (3) and the rotating disk (4).

2. The rotary fixture for a milling machine according to claim 1, characterized in that: The rotary disk (4) is provided with a fixed clamping block (7) capable of clamping the outer wall of the workpiece. The fixed clamping block (7) is fixed to the rotary disk (4) by bolts and clamps the periphery of the workpiece. A plurality of the fixed clamping blocks (7) are equidistantly distributed around the outer path of the workpiece.

3. The rotary fixture for a milling machine according to claim 1, characterized in that: The upper end of the shaft core (5) is located at the top of the rotating disk (4) and is provided with a limit plate. The lower end of the shaft core (5) passes through the rotating disk (4) and the side plate (3) at the same time, and a pressure plate (6) is fixed at the bottom by bolts. The rotating disk (4) rotates on the upper end of the side plate (3) through the cooperation of the shaft core (5) and the pressure plate (6).

4. The rotary fixture for a milling machine according to claim 1, characterized in that: The side plate (3) is provided with a positioning hole (8) for inserting into a positioning pin (9), and the rotating disk (4) is provided with four positioning holes (8) equidistantly distributed around a circumference. The positioning hole (8) on the rotating disk (4) can be coaxial with the positioning hole (8) on the positioning pin (9), and the positioning pin (9) simultaneously inserts two coaxial positioning holes (8).

5. The rotary fixture for a milling machine according to claim 1, characterized in that: There are four positioning bolts (10) distributed in a circle, and four connection holes cooperating with the four positioning bolts (10) are provided on the side plate (3) and the rotating disk (4). The rotating disk (4) is fixed on the side plate (3) by connecting the positioning bolts (10).

6. The rotary fixture for a milling machine according to claim 1, characterized in that: The base (1) and the directional panel (2) are fixed by bolts, and the side panel (3) and the directional panel (2) are also fixed by bolts.

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