CN113145908A - Processing method of curved surface thin shell structure of high-temperature broadband electromagnetic absorption composite material - Google Patents
Processing method of curved surface thin shell structure of high-temperature broadband electromagnetic absorption composite material Download PDFInfo
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- CN113145908A CN113145908A CN202110581764.4A CN202110581764A CN113145908A CN 113145908 A CN113145908 A CN 113145908A CN 202110581764 A CN202110581764 A CN 202110581764A CN 113145908 A CN113145908 A CN 113145908A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
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Abstract
The invention discloses a processing method of a curved surface thin shell structure of a high-temperature broadband electromagnetic absorption composite material, which improves the frequency of tool changing by using a hard alloy end mill and a ball end mill which have high hardness and good wear resistance, keeps a cutting edge sharp, and reduces the cutting force by adopting a small-feed processing mode; the emulsion is continuously used in the cutting process to reduce the surface temperature of the workpiece, so that the ignition phenomenon is avoided, and the processing precision of the high-temperature broadband electromagnetic absorption composite material thin shell structure is ensured; through designing the clamping frock, avoid clamping power direct action to lead to the material fracture to damage on the workpiece surface as far as possible, the machining size precision is high, maneuverability is strong, and the product processing uniformity is good, satisfies the manufacturing demand of the conformal antenna of high integration structure function integration completely, ensures that thin shell structure does not produce crackle, bursts apart from the scheduling problem in the course of working to guarantee that machining precision tolerance everywhere controls at 0.03 mm.
Description
Technical Field
The invention relates to the field of integrated antenna manufacturing, in particular to a processing method of a curved surface thin shell structure of a high-temperature broadband electromagnetic absorption composite material.
Background
Because the requirement on the integration level of the traditional antenna manufacturing is not high, the electromagnetic absorption structure for the antenna at present is mainly a simple plane structure, and the absorption material is generally prepared by medium-temperature epoxy resin, the hardness of the material is not high, and the traditional machining method can meet the requirement. With the development of antennas towards high reliability and structural function integration, the requirements of the absorption structure of the core component part on the aspects of processing shape, processing precision, process compatibility and the like are higher and higher. As a novel material, the high-temperature broadband electromagnetic absorption composite material has the following advantages compared with other traditional electromagnetic absorption materials: the material has excellent electrical property and magnetic property in a wide frequency band of 0.7-25 GHZ; the thermal deformation temperature is high and can reach 200-220 ℃, the antenna can be compatible with various subsequent high-temperature processes of products such as welding, co-curing and the like, and the antenna is widely applied to conformal integrated antenna design with high performance requirements.
The high-temperature broadband electromagnetic absorption composite material is made of NiFe2O4The wave-absorbing material is dispersed in a resin system by a vacuum stirring process and is processed by high-temperature co-curing, and the production steps mainly comprise batch preparation, dispersion, curing, post-processing and the like. 10-15% of high-temperature broadband electromagnetic absorption composite materialEpoxy phenolic resin matrix and 80% NiFe2O4The material has high brittleness and hardness, can generate serious abrasion on a processing cutter, and is easy to generate sparks when being cut under a dry condition; modified epoxy phenolic resin matrix and NiFe2O4The bonding interface is not high in bonding strength, and the interface bonding part is easy to crack and break under the action of cutting force. Based on the two points, the high-temperature broadband electromagnetic absorption composite material is difficult to process, and especially the structure with complex shape and high precision requirement is more difficult to process.
And because the antenna is required for the integration of structural functions, the forms of all the constituent structures are more and more complex, the high-temperature broadband electromagnetic absorption composite material has a complex curved surface thin shell structure, the thickness is thin (less than 3 mm), the precision requirement is high (the tolerance zone is +/-0.03 mm), and a plurality of thin-wall structures (the wall thickness is 1.5 mm) are formed by curved surface open cavities. If the traditional machining process and the clamping mode are adopted for machining, the problems of edge breakage, cracking, more burrs and the like are easily caused, and the machining precision is difficult to meet the requirement of a complex wave-absorbing structure. Therefore, a method for processing a curved surface thin shell structure of a high-temperature broadband electromagnetic absorption composite material with good fixing effect and high processing precision is urgently needed.
Disclosure of Invention
The invention aims to provide a processing method of a curved surface thin shell structure of a high-temperature broadband electromagnetic absorption composite material, which uses a hard alloy end mill and a ball end mill which have high hardness and good wear resistance, keeps a cutting edge sharp by improving the frequency of tool changing, and reduces cutting force by adopting a small-feed processing mode; meanwhile, the emulsion is continuously used in the cutting process to reduce the surface temperature of the workpiece, so that the ignition phenomenon is avoided, and the processing precision of the high-temperature broadband electromagnetic absorption composite material thin shell structure is ensured; and through designing the clamping frock, avoid clamping power direct action to lead to the material fracture to damage on the work piece surface as far as possible, the processing size precision is high, maneuverability is strong, and the product processing uniformity is good, satisfies the manufacturing demand of high integration structure function integration conformal antenna completely.
The embodiment of the invention is realized by the following steps:
a processing method of a curved surface thin shell structure made of a high-temperature broadband electromagnetic absorption composite material comprises the following steps: s1: performing primary processing on the raw materials to obtain coarse materials, and reserving a clamping position on one surface of the preprocessed concave cambered surface; s2: fixing the clamping position by adopting a first tool clamp, and further fixing the coarse material on the tool clamp; s3: roughly milling one side of the rough material preprocessing convex arc surface to obtain a first rough blank; s4: carrying out finish milling on one roughly milled surface of the first rough blank to obtain a second rough blank with a convex cambered surface; s5: taking down the second rough blank and fixing the second rough blank by adopting a second tool clamp, wherein the convex arc surface faces inwards; s6: roughly milling one side of the preprocessed concave cambered surface of the second rough blank to obtain a first fine blank; s7: carrying out finish milling on the roughly milled surface of the first fine blank to obtain a second fine blank with a concave arc surface; s8: fixing the second thin blank by using a third tool clamp, wherein a fixing boss is arranged on the third tool clamp and used for being attached to the concave cambered surface; s9: and roughly milling a plurality of through holes on the second thin blank, and then finely milling the plurality of through holes to obtain the curved surface thin shell structure. By using the hard alloy end mill and the ball end mill which have high hardness and good wear resistance, the cutting edge is kept sharp by improving the tool changing frequency, and the cutting force is reduced by adopting a small-feed processing mode; meanwhile, the emulsion is continuously used in the cutting process to reduce the surface temperature of the workpiece, so that the ignition phenomenon is avoided, and the processing precision of the high-temperature broadband electromagnetic absorption composite material thin shell structure is ensured; and through designing the clamping frock, avoid clamping power direct action to lead to the material fracture to damage on the work piece surface as far as possible, the processing size precision is high, maneuverability is strong, and the product processing uniformity is good, satisfies the manufacturing demand of high integration structure function integration conformal antenna completely. The problems of cracks, edge breakage and the like of the thin shell structure in the machining process are avoided by strictly designing reasonable process flow, process parameters and clamping tools in the machining process, and the machining precision tolerance of each part is controlled to be +/-0.03 mm.
Preferably, the first tool clamp comprises a fixing portion, a clamping portion and a screw, the fixing portion is used for placing the coarse material, the clamping portion is fixed at two ends of the fixing portion through the screw, and then the clamping position of the coarse material is fixed. Because the high-temperature broadband electromagnetic absorption composite material has extremely high brittleness, the clamping force in the clamping process can easily cause material cracking and edge breakage, so that the forming surface of a workpiece can be prevented from being directly clamped as much as possible, and the precise tool clamping is manufactured, so that the clamping force acts on the tool instead of directly acting on the surface of the workpiece.
Preferably, the roughing mill in step S3 uses a Φ 10 cemented carbide end mill, the rotation speed is set in the range of 2500RPM to 3000RPM, and the feed is set in the range of 500mm/min to 550 mm/min.
Preferably, in the finish milling in the step S4, a Φ 4 cemented carbide ball end mill is used, the rotation speed is set within the range of 4800 RPM-5200 RPM, the feed is set within the range of 1300 mm/min-1500 mm/min, the convex arc surface 1 of the thin shell structure is milled, a new cutter is changed for each five workpieces processed in the finish milling process, and the emulsion is used for cooling in the processing process. Because the bonding force of the internal interface of the high-temperature broadband electromagnetic absorption composite material is not strong, and the material is hard, the material is easy to crack, break and strike sparks under the action of cutting force, small feed is adopted in the processing, the processing stress is reduced as much as possible, and the cutting fluid is continuously used in the processing process to avoid striking sparks.
Preferably, a groove is formed in the second tool clamp and used for being attached to the convex arc surface of the second rough blank, and limiting bosses for limiting the second rough blank are arranged at two ends of the groove.
Preferably, in step S6, the roughing mill uses a phi 10 cemented carbide end mill, the speed of rotation is set in the range of 2500RPM to 3000RPM, and the feed is set in the range of 700 mm/min to 800 mm/min.
Preferably, in step S7, a Φ 4 cemented carbide ball end mill is used for finish milling, the rotation speed is set within the range of 4800 RPM-5200 RPM, the feed is set within the range of 1300 mm/min-1500 mm/min, the concave arc surface 2 of the thin shell structure is milled, a new cutter is changed for each five workpieces processed in the finish milling process, and the emulsion is used for cooling in the processing process.
Preferably, in step S9, the rough milling is performed by using a phi 6 cemented carbide end mill, the rotation speed is set in the range of 3500RPM to 4000RPM, and the feed is set in the range of 400 mm/min to 500 mm/min.
Preferably, in step S9, the finish milling is performed by using a Φ 4 cemented carbide ball end mill, the rotation speed is set within the range of 4700 RPM to 4800RPM, the feed is set within the range of 320mm/min to 350mm/min, the through cavity is milled, and a new cutter is changed every five workpieces processed during the finish milling.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: according to the processing method of the curved surface thin shell structure of the high-temperature broadband electromagnetic absorption composite material, the hard alloy end mill and the ball end mill which are high in hardness and good in wear resistance are used, the sharpness of a cutting edge is kept by improving the tool changing frequency, and the cutting force is reduced by adopting a small-feed processing mode; meanwhile, the emulsion is continuously used in the cutting process to reduce the surface temperature of the workpiece, so that the ignition phenomenon is avoided, and the processing precision of the high-temperature broadband electromagnetic absorption composite material thin shell structure is ensured; and through designing the clamping frock, avoid clamping power direct action to lead to the material fracture to damage on the work piece surface as far as possible, the processing size precision is high, maneuverability is strong, and the product processing uniformity is good, satisfies the manufacturing demand of high integration structure function integration conformal antenna completely. The problems of cracks, edge breakage and the like of the thin shell structure in the machining process are avoided by strictly designing reasonable process flow, process parameters and clamping tools in the machining process, and the machining precision tolerance of each part is controlled to be +/-0.03 mm.
Drawings
FIG. 1 is a flow chart of the method steps in the present invention;
FIG. 2 is a schematic view of the thin shell structure of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 according to the present invention;
FIG. 4 is a schematic diagram of the coarse material structure of the present invention;
FIG. 5 is a schematic view of a second blank according to the present invention;
FIG. 6 is a schematic view of a second billet construction according to the present invention;
FIG. 7 is a schematic view of a clamping portion according to the present invention;
FIG. 8 is a schematic structural view of a second tooling fixture of the present invention;
fig. 9 is a schematic structural view of a third tooling fixture of the present invention.
Description of specific element symbols: 1. a thin shell structure; 2. a through hole; 3. coarse material; 4. a second rough blank; 5. a second thin blank; 6. a clamping part; 7. a second tooling fixture; 8. a third tooling fixture; 11. a convex arc surface; 12. a concave arc surface; 71. a groove; 72. a limiting boss; 81. and fixing the boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1: referring to fig. 1 to 9, in the method for processing a curved thin shell structure of a high-temperature broadband electromagnetic absorption composite material according to the present embodiment, the curved thin shell structure 1 includes an inner concave arc surface 12 and an outer convex arc surface 11, and the curved thin shell structure 1 is provided with a plurality of through holes 2 communicating the concave arc surface 12 and the convex arc surface 11, including the following steps: s1: the raw materials are subjected to primary processing to prepare a coarse material 3, and a clamping position is reserved on one side of the preprocessed concave cambered surface 12; s2: fixing the clamping position by adopting a first tool clamp, and further fixing the coarse material 3 on the tool clamp; s3: roughly milling one side of the pre-processed convex arc surface 11 of the coarse material 3 to obtain a first rough blank; s4: finish milling is carried out on one surface of the first rough blank rough mill to obtain a second rough blank 4 with a convex cambered surface 11; s5: taking down the second rough blank 4 and fixing the second rough blank 4 by adopting a second tool clamp 7, wherein the convex cambered surface 11 faces inwards; s6: roughly milling one side of the pre-processed concave cambered surface 12 of the second rough blank 4 to obtain a first thin blank; s7: carrying out finish milling on the roughly milled surface of the first fine blank to obtain a second fine blank 5 with a concave cambered surface 12; s8: fixing the second thin blank 5 by using a third tool clamp 8, wherein a fixing boss 81 is arranged on the third tool clamp 8, and the fixing boss 81 is used for being attached to the concave cambered surface 12; s9: and roughly milling a plurality of through holes 2 in the second thin blank 5, and then finely milling the plurality of through holes 2 to obtain the curved surface thin shell structure 1.
Example 2: by using the hard alloy end mill and the ball end mill which have high hardness and good wear resistance, the cutting edge is kept sharp by improving the tool changing frequency, and the cutting force is reduced by adopting a small-feed processing mode; meanwhile, the emulsion is continuously used in the cutting process to reduce the surface temperature of the workpiece, so that the ignition phenomenon is avoided, and the processing precision of the high-temperature broadband electromagnetic absorption composite material thin-shell structure 1 is ensured; and through designing the clamping frock, avoid clamping power direct action to lead to the material fracture to damage on the work piece surface as far as possible, the processing size precision is high, maneuverability is strong, and the product processing uniformity is good, satisfies the manufacturing demand of high integration structure function integration conformal antenna completely. In the processing process, the problems of cracks, edge breakage and the like of the thin shell structure 1 are avoided in the processing process through strictly designing reasonable process flow, process parameters and clamping tools, and the processing precision tolerance of each part is controlled to be +/-0.03 mm.
Embodiment 3, the first frock clamp of this embodiment includes fixed part, clamping part 6 and screw rod, and the fixed part is used for placing coarse fodder 3 to fix clamping part 6 at the both ends of fixed part through the screw rod, and then fix the clamping position of coarse fodder 3. Because the high-temperature broadband electromagnetic absorption composite material has extremely high brittleness, the clamping force in the clamping process can easily cause material cracking and edge breakage, so that the forming surface of a workpiece can be prevented from being directly clamped as much as possible, and the precise tool clamping is manufactured, so that the clamping force acts on the tool instead of directly acting on the surface of the workpiece. In the rough milling in step S3 of the present example, a Phi 10 cemented carbide end mill was used, the rotation speed was set in the range of 2500RPM to 3000RPM, and the feed was set in the range of 500mm/min to 550 mm/min. In the step S4 of this embodiment, a Φ 4 cemented carbide ball end mill is used for finish milling, the rotation speed is set within the range of 4800 RPM-5200 RPM, the feed is set within the range of 1300 mm/min-1500 mm/min, the convex arc surface 11 of the thin shell structure 1 is milled, a new tool is changed for each five workpieces processed in the finish milling process, and the emulsion is used for cooling in the processing process. Because the bonding force of the internal interface of the high-temperature broadband electromagnetic absorption composite material is not strong, and the material is hard, the material is easy to crack, break and strike sparks under the action of cutting force, small feed is adopted in the processing, the processing stress is reduced as much as possible, and the cutting fluid is continuously used in the processing process to avoid striking sparks.
Example 4: the second tooling fixture 7 of the embodiment is provided with a groove 71, the groove 71 is used for fitting the convex arc surface 11 of the second rough blank 4, and two ends of the groove 71 are provided with limiting bosses 72 for limiting the second rough blank 4. In step S6, the rough milling is performed by using a phi 10 cemented carbide end mill, the rotation speed is set in the range of 2500RPM to 3000RPM, and the feed is set in the range of 700 mm/min to 800 mm/min. In step S7, in this embodiment, a Φ 4 cemented carbide ball end mill is used for finish milling, the rotation speed is set within the range of 4800 RPM-5200 RPM, the feed is set within the range of 1300 mm/min-1500 mm/min, the concave arc surface 12 of the thin shell structure 1 is milled, a new tool is changed for each five workpieces processed during finish milling, and the emulsion is used for cooling during processing.
Example 5: in step S9, the finish milling is performed by using a 6 carbide end mill, the rotation speed is set in the range of 3500RPM to 4000RPM, and the feed is set in the range of 400 mm/min to 500 mm/min. In step S9, in this embodiment, a Φ 4 cemented carbide ball end mill is used for finish milling, the rotation speed is set within the range of 4700 RPM to 4800RPM, the feed is set within the range of 320mm/min to 350mm/min, the through cavity is milled, and a new cutter is changed for each five workpieces processed during finish milling.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A processing method of a curved surface thin shell structure made of a high-temperature broadband electromagnetic absorption composite material is characterized by comprising the following steps of:
s1: performing primary processing on the raw materials to obtain coarse materials, and reserving a clamping position on one surface of the preprocessed concave cambered surface;
s2: fixing the clamping position by adopting a first tool clamp, and further fixing the coarse material on the tool clamp;
s3: roughly milling one side of the rough material preprocessing convex arc surface to obtain a first rough blank;
s4: carrying out finish milling on one roughly milled surface of the first rough blank to obtain a second rough blank with a convex cambered surface;
s5: taking down the second rough blank and fixing the second rough blank by adopting a second tool clamp, wherein the convex arc surface faces inwards;
s6: roughly milling one side of the preprocessed concave cambered surface of the second rough blank to obtain a first fine blank;
s7: carrying out finish milling on the roughly milled surface of the first fine blank to obtain a second fine blank with a concave arc surface;
s8: fixing the second thin blank by using a third tool clamp, wherein a fixing boss is arranged on the third tool clamp and used for being attached to the concave cambered surface;
s9: and roughly milling a plurality of through holes on the second thin blank, and then finely milling the plurality of through holes to obtain the curved surface thin shell structure.
2. The processing method of the curved thin-shell structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein the first tooling fixture comprises a fixing portion, a clamping portion and a screw rod, the fixing portion is used for placing the coarse material, the clamping portion is fixed at two ends of the fixing portion through the screw rod, and accordingly clamping positions of the coarse material are fixed.
3. The method for processing the curved thin-shell structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein the rough milling in the step S3 uses a phi 10 hard alloy end mill, the rotation speed is set within the range of 2500RPM to 3000RPM, the feeding is set within the range of 500mm/min to 550mm/min, and the emulsion is used for cooling during the processing.
4. The method for processing the curved thin-walled structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein the finish milling in step S4 uses a Φ 4 cemented carbide ball end mill, the rotation speed is set within the range of 4800 RPM-5200 RPM, the feed is set within the range of 1300 mm/min-1500 mm/min, the convex arc surface of the thin-walled structure is milled, a new cutter is changed for each five workpieces processed during the finish milling, and the emulsion is used for cooling during the processing.
5. The processing method of the curved thin-shell structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein a groove is formed in the second tool clamp, the groove is used for being attached to the convex arc surface of the second rough blank, and limiting bosses for limiting the second rough blank are arranged at two ends of the groove.
6. The method for processing the curved thin-shell structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein in step S6, a Φ 10 hard alloy end mill is used for rough milling, the rotation speed is set to be within the range of 2500RPM to 3000RPM, the feeding speed is set to be within the range of 700 mm/min to 800mm/min, and emulsion is used for cooling during the processing.
7. The method for processing the curved thin-walled structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein in step S7, a Φ 4 hard alloy ball end mill is used for finish milling, the rotation speed is set within the range of 4800 RPM-5200 RPM, the feed is set within the range of 1300 mm/min-1500 mm/min, the concave arc surface of the thin-walled structure is milled, a new cutter is replaced for each five workpieces processed during the finish milling, and the emulsion is used for cooling during the processing.
8. The method for processing the curved thin-shell structure of the high-temperature broadband electromagnetic absorption composite material according to claim 1, wherein in step S9, a phi 6 hard alloy end mill is used for rough milling, the rotation speed is set in the range of 3500RPM to 4000RPM, the feeding speed is set in the range of 400 mm/min to 500mm/min, and the emulsion is used for cooling during the processing.
9. The method for processing the curved thin-walled structure of the high-temperature broadband electromagnetic absorption composite material as claimed in claim 1, wherein in step S9, a phi 4 cemented carbide ball end mill is used for finish milling, the rotation speed is set within the range of 4700 RPM-4800 RPM, the feed is set within the range of 320 mm/min-350 mm/min, the through cavity is milled, and a new cutter is changed for each five workpieces processed during the finish milling.
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| CN114700655A (en) * | 2022-04-11 | 2022-07-05 | 中国电子科技集团公司第三十八研究所 | Soldering lug processing device and processing method |
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