CN-122007814-A - Machining method and machining tool for outer side rotary structure of special-shaped part

CN122007814ACN 122007814 ACN122007814 ACN 122007814ACN-122007814-A

Abstract

The invention discloses a processing method and a processing cutter for an outer side rotary structure of a special-shaped part, and belongs to the field of machining of aerospace parts. The machining method comprises milling, auxiliary clamping and turning, wherein the milling comprises basic characteristics, process lugs and auxiliary clamping tools required by machining and turning, the auxiliary clamping adopts a lap joint mode to improve the rigidity of a product in the turning process, and the turning adopts a special machining tool to machine an outer side rotary structure of a special-shaped part so as to ensure the precision requirement of the product. The processing cutter consists of a standard turning tool and a special cutter bar, the orientation of the standard turning tool can be adjusted, and the processing of the characteristics of the outer side rotary structure of the special-shaped part in different directions is realized.

Inventors

WANG HONGHUI
ZHANG FEIHANG
PAN XIAOWANG
ZHANG YUSHENG
LIU WEIHONG
WU SHIHUI
XUE FENG

Assignees

上海航天设备制造总厂有限公司

Dates

Publication Date: 20260512
Application Date: 20260317

Claims (3)

1. The machining method for the special-shaped part outer side rotary structure is characterized in that the special-shaped part (2) comprises a rotary structure and a connecting part (27), the rotary structure comprises a left rotary part and a right rotary part, the connecting part (27) is of an X-shaped bracket structure and is used for connecting the left rotary part and the right rotary part together, an outer side typical characteristic of the left rotary part comprises a first outer circle (24) and a first end face (23), an outer side typical characteristic of the right rotary part comprises a second outer circle (22) and a second end face (21), the first outer circle (24) and the second outer circle (22) have a dimensional tolerance requirement of phi 47 (-0.025,0), and a coaxiality requirement of 0.02 relative to a common axis formed by a first inner hole (26) and a second inner hole (28), and a perpendicularity requirement of 0.02 relative to the common axis formed by the first end face (23) and the second end face (21) is characterized by comprising the following steps: Step A, adopting a numerical control milling machine to process positioning references required by a plurality of lathes, boring a first inner hole (26) and a second inner hole (28) under the same clamping state, and milling a third end surface (25); Step B, machining technological lugs required by a plurality of turning machines by a numerical control milling machine, machining technological lugs (211) for clamping the plurality of turning machines on the special-shaped part (2) and technological lugs (212) for switching and bridging, and independently machining switching blocks (5) for bridging and switching plates (3) for bridging; Step C, auxiliary clamping and installing of the bridging, wherein the special-shaped part (2) is placed on a marble Dan Pingtai in a free state, the bridging adapter block (5) is screwed on the bridging process lug (212), and the bridging adapter plate (3) is glued and solidified on the bridging adapter block (5); The numerical control lathe clamps the special-shaped part (2), the lathe turning tool (6) adopts a third end face (25) and a first inner hole (26) as axial and central clamping positioning references, and a clamping process lug (211) is pressed onto the tool (6) by a pressing plate; E, clamping the tool tip of a turning tool (43) of the machining tool (4) on a tool bar (41) outwards, and turning a first outer circle (24) and a first end face (23) as shown in figure 1; F, reloading, wherein the tool tip of a turning tool (43) of the machining tool (4) is clamped on the tool bar (41) inwards, namely, the tool tip of the turning tool (43) is positioned in the opening of the tool bar (41), and as shown in fig. 2, a second outer circle (22) and a second end face (21) are turned; And G, removing glue at the position of the bridging adapter plate (3) by adopting a glue removing agent, removing screws, removing bridging adapter blocks (5), removing clamping process lugs (211) and switching bridging process lugs (212) by adopting a numerical milling process, and removing burrs and stains on the surface of a part by a bench worker.
2. The auxiliary clamping method is suitable for the steps E and F in the machining method of the special-shaped part outer side rotary structure, and is characterized in that an changeover bridging process lug (212) is positioned on the special-shaped part (2), a bridging changeover block (5) is assembled with the changeover bridging process lug (212) in a screwed mode, the bridging changeover block (5) is fixedly bonded with a bridging changeover plate (3) in a glued mode, the bridging changeover block (5) and the bridging changeover plate (3) are both made of aluminum alloy materials 2A14, the changeover bridging process lug (212), the bridging changeover block (5) and the bridging changeover plate (3) required by the auxiliary clamping method are machined in the machining method step B, the auxiliary clamping is assembled in the machining method step C, and the machining process is completed by means of the auxiliary clamping.
3. A machining tool (4) for an outside rotary structure of a special-shaped part according to claim 1, wherein the machining tool (4) comprises a tool bar (41) and a phi 6 standard turning tool (43), the middle part of the tool bar (41) is of a trapezoid avoiding structure, the front end of the tool bar (41) is provided with a mounting hole and a set screw hole, the model of the standard turning tool (43) is CXS-06T098-20-6220R 1025, the standard turning tool (43) is mounted in the mounting hole of the tool bar (41) through two phi 3 set screws (42), and the standard turning tool (43) can be mounted on the tool bar in two directions, namely outwards and inwards, and is used for machining a first outer circle (24), a first end face (23), a second outer circle (22) and a second end face (21) of the special-shaped part (2).

Description

Machining method and machining tool for outer side rotary structure of special-shaped part Technical Field The invention relates to the field of machining, in particular to a machining method and a machining cutter for an outer side rotary structure of a special-shaped part. Background The special-shaped part is a key support of an output joint in a certain mast mechanism, an outer side rotating structure of the special-shaped part is tightly connected with a sealing structure of the output joint, and in order to ensure the sealing performance of the output joint, the precision requirements of 0.025 of dimensional tolerance and 0.02 of form and position tolerance are provided for the outer side rotating structure of the special-shaped part. Because the left rotating part and the right rotating part of the special-shaped part are connected through the connecting part, the special-shaped part cannot be machined through a conventional turning mode, and under the existing production conditions, an outer rotating structure is usually machined through a milling mode, but the milling mode requires a machine tool spindle to be subjected to multiple-tilting handover machining, and the accuracy of the outer rotating structure cannot meet the design requirement. Disclosure of Invention The method and the tool for machining the special-shaped part outer side rotary structure have the advantages that the problems that machining accuracy cannot be guaranteed and machining cannot be conducted in a conventional turning mode due to milling are solved. The auxiliary clamping as claimed in claim 2 is adopted to improve the rigidity of the part in the turning process and ensure the precision index requirement of the outer side rotary structure. The invention provides a processing method of an external rotary structure of a special-shaped part, wherein the special-shaped part (2) comprises a rotary structure and a connecting part 27, the rotary structure comprises a left rotary part and a right rotary part, the connecting part 27 is an X-shaped bracket structure and is used for connecting the left rotary part and the right rotary part together, an external typical characteristic of the left rotary part comprises a first outer circle 24 and a first end face 23, an external typical characteristic of the right rotary part comprises a second outer circle 22 and a second end face 21, the first outer circle 24 and the second outer circle 22 have the dimensional tolerance requirement of phi 47-0.025,0, and the coaxiality requirement of 0.02 relative to a common axis formed by a first inner hole 26 and a second inner hole 28 exists, and the first end face 23 and the second end face 21 have the perpendicularity requirement of 0.02 relative to the common axis formed by the first inner hole 26 and the second inner hole 28, and the processing method comprises the following steps: step A, adopting a numerical control milling machine to process positioning references required by a plurality of lathes, boring a first inner hole 26 and a second inner hole 28 in the same clamping state, and milling a third end surface 25; Step B, machining technological lugs required by a plurality of trolleys by adopting a numerical control milling machine, machining technological lugs 211 for clamping the plurality of trolleys and technological lugs 212 for switching and bridging on the special-shaped part 2, and independently machining a switching block 5 for bridging and a switching plate 3 for bridging; step C, auxiliary clamping and installing of the bridging, wherein the special-shaped part 2 is placed in a free state on a marble Dan Pingtai, the bridging adapter block 5 is screwed on the bridging process lug 212, and the bridging adapter plate 3 is glued and solidified on the bridging adapter block 5; turning the fixture 6 for turning, namely clamping the special-shaped part 2 by using a numerical control lathe, adopting a third end face 25 and a first inner hole 26 as axial and central clamping positioning references, and pressing the process lug 211 for clamping onto the fixture 6 by using a pressing plate; e, clamping the tool tip of a turning tool 43 of the machining tool 4 on a tool bar 41 outwards, and turning a first outer circle 24 and a first end surface 23 as shown in figure 1; F, reloading the cutter, wherein the cutter tip of a turning tool 43 of the machining cutter 4 is clamped on the cutter bar 41 inwards, namely, the cutter tip of the turning tool 43 is positioned in the opening of the cutter bar 41, and as shown in fig. 2, the second outer circle 22 and the second end face 21 are turned; and G, removing glue at the position of the bridging adapter plate 3 by using a glue removing agent, removing the bridging adapter plate 3, removing screws, removing the bridging adapter block 5, removing the clamping process lug 211 and the bridging process lug 212 by using a number milling process, and removing burrs and stains on the surface of a par