Machining tool for open type easily-deformed multi-claw-shaped casing workpiece

Abstract

A machining tool for an open type easily-deformed multi-claw-shaped casing workpiece comprises a circular ring on the lower portion and an upper cover, the cambered surface of the outer surface of the circular ring is the same as the cambered surface of a circular truncated cone on the inner surface of the annular casing workpiece, and the diameter of the outer ring of the upper end of the circular ring is equal to that of the inner ring of the annular casing workpiece; the periphery of the lower end of the circular ring is provided with a plurality of claws for positioning a casing workpiece in a step manner, the periphery of the circular ring is provided with a step for tightly embedding the casing workpiece, the cambered surface of the peripheral surface of the circular ring is uniformly provided with fixing holes, and the inner ring of the circular ring tool is provided with a groove; the upper cover is embedded into the cartridge receiver workpiece and is supported by an inner ring on the upper portion of the cartridge receiver workpiece, a step is arranged on an inner ring of the upper cover, the upper wall of the cartridge receiver workpiece is tightly attached to the inner wall of the upper cover, and the lower end of the cartridge receiver workpiece is positioned through the periphery of the lower end of the circular ring.

Description

Technical Field

[0001] The utility model relates to a mechanical processing tool, in particular to a processing tool for special parts of an aerospace engine. Background Art

[0002] Since some parts of aircraft engines require extremely high precision, the materials are hard and difficult to process; there are many processing difficulties: the open, deformable, annular, multi-claw (multi-claws extend at an approximately vertical angle from the outer edge of the annular) casing workpiece involved in this application is a type of component that is difficult to process: this open, multi-claw casing workpiece (see Figure 1 ) is easy to deform. The claws of the receiver workpiece are separated, and there are few parts connected to each other. When machining (mainly milling) to separate the two adjacent claws, the receiver workpiece is very easy to deform, and it is irreversible. The material of the receiver workpiece is high in hardness, and the wall of the receiver workpiece body is thin. It is easy to hit the knife when machining the separation features, which will cause vibration, overcut the receiver workpiece and make it difficult to machine; difficult to position. This open multi-claw structure of the receiver workpiece has no steps for clamping, and the receiver workpiece body has thin walls. For various reasons, the receiver workpiece cannot be clamped and cannot be positioned. The quality cannot be guaranteed and the efficiency is too low for forced processing.

[0003] The prior art does not disclose any tooling for machining ultra-thin parts. Utility Model Content

[0004] The utility model aims to provide a processing tool for an aviation engine part, namely an open easily deformable multi-claw casing workpiece, so as to solve the problems of low processing efficiency and high cost.

[0005] The technical solution of the utility model is as follows: a processing tool for an open, easily deformable, multi-claw-shaped receiver workpiece, the tool comprising a lower circular ring and an upper cover, the outer surface arc surface of the circular ring is the same as the frustum arc surface of the inner surface of the annular receiver workpiece, the outer ring diameter of the upper end of the circular ring is equal to the diameter of the inner ring of the annular receiver workpiece; the outer periphery of the lower end of the circular ring is provided with a step to position the multiple claws of the receiver workpiece, the outer periphery of the circular ring is provided with a step to embed the receiver workpiece, the arc surface of the outer peripheral surface of the circular ring is evenly provided with fixing holes, and the inner ring of the circular ring tooling is provided with a groove; the upper cover is embedded in the receiver workpiece and supported by the upper inner ring of the receiver workpiece, the inner ring of the upper cover has a step, so that the upper wall of the receiver workpiece and the inner wall of the upper cover are closely fitted, and the lower end of the receiver workpiece is positioned by the outer periphery of the lower end of the circular ring.

[0006] The inner circle of the upper cover is provided with a step to clamp the top of the receiver workpiece, which is used for the subsequent pressing plate to press the tooling, thereby pressing the receiver workpiece. And the hexagon socket screws (fastening screws) are inserted into the multiple claws (position holes) provided with fixed holes on the curved surface of the tooling to position and fasten the receiver workpiece.

[0007] Application of the utility model: The lower end of the tooling ring structure is clamped on the machine tool workbench. Because the inner ring of the tooling ring structure has a groove, a pressure plate is used to fasten the tooling on the workbench. The tooling ring structure is rounded and leveled for subsequent positioning of the casing workpiece.

[0008] Beneficial effects: Based on the existing conditions, the utility model proposes a processing tool for an open, easily deformable, multi-claw-shaped casing workpiece, and then adopts a milling processing method (generally performed by programming in a machining center). Large workpieces with a thickness of 1.5-2mm can be processed. Such workpieces are extremely easy to deform. This application solves the problems of low processing efficiency and high cost; the processing accuracy of the workpiece is guaranteed to ensure that it will not deform. When milling the claws, it is not a problem to mill the outer surface of the tooling, which can better ensure the accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Schematic diagram of workpiece and tooling from top view;

[0010] Figure 2 Side view of workpiece and tooling

[0011] Figure 3 Schematic diagram of the three-dimensional structure of the tooling and workpiece installation;

[0012] Figure 4 It is a cross-sectional schematic diagram of the structure of the utility model and the workpiece;

[0013] Figure 5 It is a schematic diagram of the fixing screw of the utility model, namely the hexagon socket screw. DETAILED DESCRIPTION

[0014] As shown in the figure, the tooling is a circular ring structure and an upper cover. The outer surface arc of the circular ring is the same as the inner surface truncated cone arc of the annular casing workpiece (the upper and lower inner surfaces of the annular casing workpiece are machined by the previous process. After the installation of this tooling, the outer surface, especially the claws, is machined by five-axis milling on the tooling). The diameter of the outer ring at the upper end of the circular ring is equal to the diameter of the inner ring of the annular casing workpiece. The upper cover 5 of the circular ring is provided with a step 5-1 to tighten the casing workpiece on the top. The outer surface arc of the circular ring is evenly provided with fixing holes, and the inner ring of the circular ring tooling is provided with a groove. The upper cover 5 is placed on the upper end of the casing workpiece, and the inner ring of the casing workpiece is supported by the tooling. The step clamps the top of the casing workpiece, which is used for the subsequent pressure plate to press the tooling, thereby pressing the casing workpiece.

[0015] The upper and lower steps of the ring and the upper cover fixture are firmly supported with the inner circle and the upper and lower ends of the casing workpiece, so that the inner wall of the casing workpiece and the fixture fit tightly. The lower end of the casing workpiece is positioned with the inner surface and steps of the ring fixture, and the upper end of the casing workpiece is firmly supported and pressed with the upper cover and steps (see Figure 1 , Figure 2 , Figure 3 ).

[0016] Clamp the lower end of the circular tooling on the machine tool workbench. The inner ring of the tooling has a groove 4, which is used for the pressure plate to fasten the tooling on the workbench. The tooling is rounded and leveled for subsequent positioning of the casing workpiece.

[0017] Put the casing workpiece 1 on the circular tooling 2. The inner ring of the casing workpiece fits tightly with the outer ring of the tooling, and the lower end of the casing workpiece is placed on the tooling step 3.

[0018] Use hexagon socket screws to fasten the receiver workpiece and the tooling. The hexagon socket screws are inserted into the fixed holes on the curved surface of the tooling to position and fasten the receiver workpiece (see Figure 5 ). The hexagon socket screw is a modified version of the ordinary M12 hexagon socket screw, which is very low in cost and simple to make. The front thread of the hexagon socket screw is used to fasten the receiver workpiece and tooling, and the precision polished rod in the middle is used to position the receiver workpiece and tooling, so that the receiver workpiece will not rotate or move.

[0019] The hexagon socket screws tightly connect the receiver workpiece and the tooling through the polished rod and the threaded part. The tooling at the upper and lower ends completely supports the inner wall of the receiver workpiece. The lower end of the circular tooling is provided with a step to position the receiver workpiece, and the upper end of the tooling cover is provided with a step to press the receiver workpiece, which will reduce vibration during processing and reduce the phenomenon of tool hitting. Because the receiver workpiece and the tooling are fitted together, the receiver workpiece will not produce too much deformation during the processing process.

[0020] The outer surface of the casing workpiece (blank) can be completely processed by using this milling tool, while the inner surface can be processed by a lathe.

[0021] The precision hole can be processed together with the receiver workpiece and the tooling. After drilling through the hole of the receiver workpiece, drill about 10mm deeper. In this way, the receiver workpiece and the tooling can be connected together through the smooth rod part of the hexagon socket screw. The tolerance of the receiver workpiece hole is processed to 0 / +0.012mm, and the smooth rod part of the hexagon socket screw is processed to 0 / -0.01. This can not only achieve the purpose of positioning and anti-rotation, but also easily clamp the screw. The threaded hole is processed below the smooth hole. The effective depth of the threaded hole is processed to about 18mm, and the thread length of the hexagon socket screw is 15mm, so that the thread can be effectively tightened.

[0022] The design of this tooling positioning method uses the tooling at the upper and lower ends to support, position, and press the receiver workpiece, and then uses hexagon socket screws to fasten the receiver workpiece and the tooling. The design and processing of this tooling positioning method are relatively simple, and the cost is very low. It is suitable for daily processing of receiver workpieces, can effectively improve processing quality, reduce production costs, and is suitable for processing on various common machine tools. In summary: The utility model is highly practical and flexible, and is suitable for similar workpieces within a certain range. It saves costs, innovates, and expands processing capabilities while ensuring qualified quality, and brings more convenience to tooling management work on the production site.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A processing tool for an open, easily deformable, multi-claw-shaped casing workpiece, characterized in that: The tooling comprises a lower circular ring and an upper cover, the outer surface arc of the circular ring is the same as the conical arc of the inner surface of the annular casing workpiece, and the outer ring diameter of the upper end of the circular ring is equal to the diameter of the inner ring of the annular casing workpiece; the outer periphery of the lower end of the circular ring is provided with a step to position multiple claws of the casing workpiece, the outer periphery of the circular ring is provided with a step to embed the casing workpiece, the arc surface of the outer peripheral surface of the circular ring is evenly provided with fixing holes, and the inner ring of the circular ring tooling is provided with a groove; the upper cover is embedded in the casing workpiece and supported by the upper inner ring of the casing workpiece, the inner ring of the upper cover has a step, so that the upper wall of the casing workpiece and the inner wall of the upper cover fit closely, and the lower end of the casing workpiece is positioned by the outer periphery of the lower end of the circular ring.

2. The processing tool for the open deformable multi-claw casing workpiece according to claim 1 is characterized in that: Insert the hexagon socket screws into the fixed holes provided on the curved surface of the tooling outer surface to position and fasten the multiple claws of the casing workpiece.

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