CN108838472B - Method for machining threaded hole of resin-based composite material capable of being ceramized - Google Patents
Method for machining threaded hole of resin-based composite material capable of being ceramized Download PDFInfo
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- CN108838472B CN108838472B CN201810726514.3A CN201810726514A CN108838472B CN 108838472 B CN108838472 B CN 108838472B CN 201810726514 A CN201810726514 A CN 201810726514A CN 108838472 B CN108838472 B CN 108838472B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/32—Thread cutting; Automatic machines specially designed therefor by milling
Abstract
The invention relates to a processing method of a threaded hole of a ceramizable resin matrix composite, which comprises the following steps: preparing a workpiece to be machined, wherein the workpiece to be machined is a ceramifiable resin-based composite material flat plate, machining a threaded bottom hole of the workpiece to be machined is completed through milling, the axis of the threaded bottom hole is used as a machining reference, internal threads of the workpiece to be machined are milled through threads, and then machining of a threaded hole of the ceramifiable resin-based composite material flat plate is completed. The processing method of the threaded hole of the ceramifiable resin-based composite material can improve the processing efficiency of the threaded hole and ensure the precision, the interior and the appearance quality of the threaded hole.
Description
Technical Field
The invention relates to the technical field of composite material machining, in particular to a method for machining a threaded hole of a ceramizable resin-based composite material.
Background
In recent years, with the continuous progress of science and technology, the development of material technology has been rapidly advanced. Composite materials have gradually become one of the leading materials in the 21 st century as a new type of material. The composite material has the characteristics of light weight, high specific strength, high specific modulus, corrosion resistance, high temperature resistance, ablation resistance and the like, and is an ideal material for weapons such as airplanes, missiles, aerospace crafts and the like. At present, the composite material structural member is mainly manufactured and formed by adopting the modes of mould pressing, winding, sleeving and the like.
The ceramizable resin-based composite material is used as a novel composite material, and has better density, ablation resistance, high temperature resistance and the like. With the updating of aerospace products, the requirements on flight time, Mach number and maneuverability are higher and higher, and the requirements on the performance of the heat-proof composite material are continuously improved and the requirements are also higher and higher.
The ceramizable resin-based composite material has the defects and problems that the material is high in hardness and large in brittleness, the defects of layering, slag falling, block collapse, cracks and the like are prone to occurring during processing, fibers are broken during processing, shrinkage deformation is large, cracks are prone to occurring during processing, tools are seriously abraded, and the like. The existing processing method of the threaded hole of the ceramic resin matrix composite material comprises the following steps: drilling a bottom hole by a bench worker, machining a threaded hole by the bench worker on a drilling machine through a screw tap, enlarging the threaded bottom hole, and replacing a plurality of screw taps to correct the threaded hole.
The machining method in the prior art is low in machining efficiency, and cannot guarantee the precision, the interior and the appearance quality of the threaded hole.
Disclosure of Invention
The application provides a method for processing a threaded hole of a ceramizable resin matrix composite, which solves or partially solves the technical problems that in the prior art, the processing efficiency is low, and the precision, the interior and the appearance quality of the threaded hole cannot be guaranteed.
The application provides a processing method of a threaded hole of a ceramizable resin matrix composite, which comprises the following steps:
preparing a workpiece to be processed, wherein the workpiece to be processed is a ceramizable resin matrix composite flat plate;
finishing the machining of the threaded bottom hole of the workpiece to be machined through milling;
and taking the axis of the threaded bottom hole as a processing reference, and milling the internal thread of the workpiece to be processed through threads so as to complete the processing of the threaded hole of the ceramifiable resin-based composite material flat plate.
Preferably, the preparing the member to be processed includes:
processing the two surfaces of the workpiece to be processed to a set thickness value;
and processing the appearance of the workpiece to be processed by a hard alloy milling cutter.
Preferably, the machining of the threaded bottom hole of the workpiece to be machined is completed by milling, specifically: and spirally milling the threaded bottom hole of the workpiece to be machined by using a hard alloy milling cutter.
Preferably, the internal thread of the workpiece to be machined is finished by thread milling, specifically:
and milling the internal thread to a set size by using a comb-tooth hard alloy thread milling cutter.
Preferably, the parameters of the thread milling cutter are controlled as follows: the rotation speed is 300-400 rpm, and the feeding amount is 80-200 mm/min.
Preferably, after the milling of the internal thread to a set size by the comb carbide thread mill, the method further comprises:
and under the condition that the parameter control of the thread milling cutter is not changed, the internal thread is processed once again through the comb-tooth hard alloy thread milling cutter.
Preferably, the internal thread of the workpiece to be machined is finished by thread milling, specifically: and milling the internal thread to the set size of the internal thread by a polycrystalline diamond thread milling cutter.
Preferably, after the internal thread of the workpiece to be machined is machined by thread milling, the method further comprises the following steps: and (4) reprocessing the thread bottom hole once according to the positive difference of the small-diameter deviation of the thread by using a hard alloy milling cutter.
Preferably, after the internal thread of the workpiece to be machined is machined by thread milling, the method further comprises the following steps: and detecting the precision of the internal thread.
Preferably, the accuracy of detecting the internal thread includes:
detecting the precision of the internal thread through a thread ring plug gauge;
detecting internal cracks of the internal thread by an acoustic resonance technique;
and detecting the appearance quality of the internal thread through manual visual inspection.
One or more technical solutions provided in the present application have at least the following technical effects or advantages:
the application discloses a method for processing a threaded hole of a ceramifiable resin-based composite material, which comprises the steps of firstly preparing a resin-based composite material flat plate which can be ceramified, namely a workpiece to be processed, and then finishing the processing of a threaded bottom hole of the workpiece to be processed by milling, wherein the threaded bottom hole is processed without being manually enlarged, and the threaded precision is not difficult to ensure as the threaded bottom hole is manually enlarged in the prior art; in addition, as the machining of the threaded bottom hole of the workpiece to be machined is completed by milling, the internal thread of the workpiece to be machined is milled by the thread by taking the axis of the coordinate system of the threaded bottom hole as a machining reference, and the machining of the threaded hole of the resin-based composite material plate which can be ceramic is further completed; the internal thread machining is completed through the thread milling, and a screw tap machining threaded hole is not adopted, so that the thread precision, the internal quality and the appearance quality can be ensured.
Drawings
Fig. 1 is a schematic flow chart of a threaded hole machining method for a ceramifiable resin-based composite material provided by an embodiment of the present application.
Detailed Description
The embodiment of the application provides a method for processing a threaded hole made of a ceramifiable resin-based composite material, solves or partially solves the technical problems that the processing efficiency is low and the precision, the interior and the appearance quality of the threaded hole cannot be guaranteed in the prior art, and completes the processing of a threaded bottom hole of a workpiece to be processed through milling; the coordinate system of the threaded bottom hole is used as a reference, the internal thread of the workpiece to be machined is finished through milling, then the threaded bottom hole is corrected through milling, and finally the precision of the internal thread is detected, so that the technical effects of improving the machining efficiency of the threaded hole and guaranteeing the precision, the inside and the appearance quality of the threaded hole are achieved.
Referring to the attached figure 1, the application provides a method for processing threaded holes of ceramizable resin matrix composite materials, which comprises the following steps:
s1: preparing a workpiece to be processed, wherein the workpiece to be processed is a ceramizable resin matrix composite flat plate.
S2: and finishing the machining of the threaded bottom hole of the workpiece to be machined through milling.
S3: and (3) taking the axis of the threaded bottom hole as a processing reference, and milling the internal thread of the workpiece to be processed through the threads to further finish the processing of the threaded hole of the resin-based composite material plate capable of being ceramic.
In addition, after the processing of the threaded hole of the resin matrix composite material panel capable of being ceramized is completed, the threaded bottom hole is corrected through milling processing, and finally the precision of the internal thread is detected.
Wherein, the processing of the threaded bottom hole of the workpiece to be processed is completed by milling; finishing the internal thread of the workpiece to be machined by milling according to the coordinate system of the threaded bottom hole as a reference; the precision of the internal thread is detected, the processing efficiency of the threaded hole of the ceramizable resin matrix composite plate can be obviously improved due to the design of the processing procedures, the internal thread processing is completed through thread milling, and the thread precision, the internal quality and the appearance quality can be guaranteed.
Further, step S1 includes: processing two surfaces of a workpiece to be processed to a set thickness value; and processing the appearance of the workpiece to be processed by a hard alloy milling cutter.
Further, step S2 is specifically: and (3) spirally milling the threaded bottom hole of the workpiece to be machined by using a hard alloy milling cutter, wherein the aperture tolerance of the threaded bottom hole is controlled according to the positive difference of the small-diameter deviation.
As a first implementation manner, step S3 is specifically: milling the internal thread by a comb-tooth hard alloy thread milling cutter once or for multiple times until the internal thread is set to a set size, preferably completing the operation by one-time milling; wherein, the parameter control of the thread milling cutter is as follows: the rotation speed is 300-400 rpm, and the feeding amount is 80-200 mm/min.
Further, after the step S3 is completed by the process of milling the internal thread by the comb-tooth cemented carbide thread milling cutter, the internal thread is again blank-machined by the comb-tooth cemented carbide thread milling cutter under the condition that the parameter control of the thread milling cutter is not changed.
As another implementation manner, step S3 is specifically: milling the internal thread by a polycrystalline diamond thread milling cutter (PCD thread milling cutter) to a set size of the internal thread. Of course, the milling operation can be performed once or more than once until the internal thread is set to the desired size, preferably once.
Further, after the step S3 is completed, that is, after the machining of the threaded hole is completed, the threaded bottom hole can be machined once according to the positive difference of the minor-diameter deviation of the thread by the hard alloy milling cutter, that is, the correction machining of the threaded bottom hole is realized, and the size of the threaded bottom hole can be well ensured by adopting the spiral milling and correction machining of the threaded bottom hole.
Furthermore, in the specific implementation process of detecting the precision of the internal thread, the precision of the internal thread is detected through a thread plug gauge, and the internal crack of the internal thread is detected through an acoustic resonance technology; the appearance quality of the internal thread is detected through manual visual inspection, and the precision and the defects of the threaded hole can be effectively controlled by adopting the detection means.
The threaded hole processing method of the ceramifiable resin-based composite material is described in detail by the following specific embodiments:
the part to be processed is of a cover structure, and the material is formed by die pressing of a ceramic resin matrix composite material.
The blank size of flap structure is 160mm x 50mm x 22mm, and the part size is 140mm x 35mm x 20mm, and threaded hole on it is M16 x 2-6H (the quantity is unequal, for the drawing), and the screw hole processing includes in proper order:
1. processing a threaded bottom hole:
and processing two sides of the opening cover until the thickness dimension is 20 mm.
And (5) processing the appearance of the opening cover by using a hard alloy milling cutter.
Spirally milling thread bottom hole, the size of the hole diameter being positive difference of the limit deviation of the minor diameter of the thread, i.e. phi 14+ 0 0.21And (5) controlling.
And sequentially processing all the thread bottom holes.
2. Processing a threaded hole:
the machining reference and the coordinate system of the threaded bottom hole are kept unchanged.
Milling internal threads by using an M16 multiplied by 2 comb hard alloy thread milling cutter, wherein the thread milling parameters are as follows: s is 300rpm, F is 100 mm/min; when the PCD thread milling cutter is adopted, the cutting parameters are as follows: s is 1500rpm, F is 1800 mm/min.
And under the condition that the processing program and the cutting parameters are not changed, the internal thread is milled once again by using the comb thread milling cutter.
In the same way, other threaded holes are machined.
3. And (3) correcting the threaded bottom hole:
pressing the threaded bottom hole to phi 14 by using a hard alloy milling cutter+ 0 0.21And (5) reprocessing once.
4. A detection step:
and a special thread plug gauge is adopted to detect the precision of the threaded hole.
And detecting cracks in the threaded hole by adopting an acoustic resonance technology.
And the appearance quality of the threaded hole is detected by manual visual inspection.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The processing method of the threaded hole of the resin-based composite material capable of being ceramized is characterized by comprising the following steps of:
preparing a workpiece to be processed, wherein the workpiece to be processed is a ceramizable resin matrix composite flat plate;
finishing the machining of the threaded bottom hole of the workpiece to be machined through milling;
and (3) milling an internal thread to a set size of the internal thread by using the axis of the thread bottom hole as a processing reference through a polycrystalline diamond thread milling cutter, and processing the thread bottom hole according to the positive difference of the small diameter deviation of the thread through a hard alloy milling cutter, so as to complete the processing of the threaded hole of the ceramizable resin matrix composite plate.
2. The method for machining a threaded hole in a ceramifiable resin-based composite material according to claim 1, wherein the preparing the workpiece to be machined comprises:
processing the two surfaces of the workpiece to be processed to a set thickness value;
and processing the appearance of the workpiece to be processed by a hard alloy milling cutter.
3. The threaded hole machining method for the ceramifiable resin-based composite material as claimed in claim 1, wherein the machining of the threaded bottom hole of the workpiece to be machined is completed by milling, specifically: and spirally milling the threaded bottom hole of the workpiece to be machined by using a hard alloy milling cutter.
4. The threaded hole machining method for the resin-based composite material capable of being ceramized according to claim 1, wherein the internal thread of the workpiece to be machined is completed by thread milling, specifically:
and milling the internal thread to a set size by using a comb-tooth hard alloy thread milling cutter.
5. A method for machining threaded holes in resin-based ceramic-able composites according to claim 4, characterized in that the parameters of the thread milling cutter are controlled as follows: the rotation speed is 300-400 rpm, and the feeding amount is 80-200 mm/min.
6. The method for machining a threaded hole in a ceramifiable resin-based composite material according to claim 5, wherein after the internal thread is milled to a set size by a comb carbide thread mill, the method further comprises:
and under the condition that the parameter control of the thread milling cutter is not changed, the internal thread is processed once again through the comb-tooth hard alloy thread milling cutter.
7. The threaded hole machining method for the ceramifiable resin-based composite material as set forth in claim 1, wherein after the machining of the internal thread of the workpiece to be machined by thread milling, the method further comprises: and detecting the precision of the internal thread.
8. The method for machining a threaded hole in a ceramifiable resin-based composite material as claimed in claim 7, wherein said detecting the accuracy of the internal thread comprises:
detecting the precision of the internal thread through a thread plug gauge;
detecting internal cracks of the internal thread by an acoustic resonance technique;
and detecting the appearance quality of the internal thread through manual visual inspection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810726514.3A CN108838472B (en) | 2018-07-04 | 2018-07-04 | Method for machining threaded hole of resin-based composite material capable of being ceramized |
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| CN201810726514.3A CN108838472B (en) | 2018-07-04 | 2018-07-04 | Method for machining threaded hole of resin-based composite material capable of being ceramized |
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| CN108838472B true CN108838472B (en) | 2021-06-15 |
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| CN109521094B (en) * | 2018-11-28 | 2021-10-22 | 湖北三江航天红阳机电有限公司 | Acoustic resonance detection method for internal quality of porcelainized resin matrix composite obliquely-stacked winding product |
| CN114488952A (en) * | 2022-01-24 | 2022-05-13 | 北京佳顺极光科技有限公司 | Thread machining method and device, electronic equipment and medium |
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| JP2005147407A (en) * | 2005-01-07 | 2005-06-09 | Smc Corp | Manufacturing method of ball rolling groove |
| CN101767227A (en) * | 2009-12-28 | 2010-07-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for milling large diameter thread of titanium alloy or high-temperature alloy material pieces |
| CN103157845A (en) * | 2011-12-19 | 2013-06-19 | 泳捷科技有限公司 | Cutter structure |
| CN104174941A (en) * | 2013-05-21 | 2014-12-03 | 苏州锑玛精密机械有限公司 | Thread milling cutter |
| CN103817743B (en) * | 2014-02-18 | 2016-02-10 | 北京工商大学 | For the brill milling compound tool of fibrous composite and the brill milling method of fibrous composite |
| CN104070217B (en) * | 2014-06-19 | 2016-10-19 | 南京中车浦镇城轨车辆有限责任公司 | The processing method of milling large thin-wall Al alloy composite W shape section bar |
| CN107052476B (en) * | 2017-03-23 | 2018-12-21 | 航天材料及工艺研究所 | A kind of low damage processing technology of Continuous Fiber Reinforced Ceramic Matrix Composites screw thread |
| CN106964827B (en) * | 2017-05-18 | 2019-11-29 | 株洲钻石切削刀具股份有限公司 | A kind of compound thread milling cutter |
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