CN113798883A - Tool and method for machining outer surface of thin-wall deep-cavity cover part - Google Patents
Tool and method for machining outer surface of thin-wall deep-cavity cover part Download PDFInfo
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- CN113798883A CN113798883A CN202111160854.2A CN202111160854A CN113798883A CN 113798883 A CN113798883 A CN 113798883A CN 202111160854 A CN202111160854 A CN 202111160854A CN 113798883 A CN113798883 A CN 113798883A
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- 238000003754 machining Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 14
- 241000446313 Lamella Species 0.000 claims description 18
- 238000003801 milling Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 229910001063 inconels 617 Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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Classifications
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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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to a tool and a method for machining the outer profile of a thin-wall deep-cavity cover part, and belongs to the technical field of advanced manufacturing. This processing frock structural design is interior supporting structure frock, about, the split about the frock, and profile in the whole appearance accords with, sets up interior supporting screw hole on the split for prop the screw rod in the installation, prop the screw rod through adjusting in, so that the frock supports the laminating completely with the profile in the processing position. The profile to be processed is milled according to the tooling split area, and the degree of contact of the split tooling with the profile support in the processing area can be adjusted at any time during processing, so that the processing yield and resilience are reduced, and the wall thickness precision is improved. The invention is mainly used for meeting the development requirements of special-shaped thin variable-wall deep cavity cover parts for certain heat-proof structures and solving the practical engineering problem that the wall thickness precision of thin variable-wall thick parts is difficult to control.
Description
Technical Field
The invention relates to a tool and a method for machining the outer profile of a thin-wall deep-cavity cover part, and belongs to the technical field of advanced manufacturing.
Background
With the development of international situation and military technology, the development of military products with high striking precision, high flying speed and strong penetration resistance is urgently needed in China. The thrust system of the product needs to be protected by a thermal structure and has light weight, so that the thrust system is usually provided with special-shaped (the special-shaped means that the cross section view is not circular, is not elliptical, is not square and is not rectangular) and thin-wall-variable deep-cavity cover parts, the thrust system is protected by heat insulation, the space of a bottom heat-insulation-prevention system can be effectively utilized, the light-weight design is realized, and the purpose of effectively reducing weight is achieved. The prior thin-wall deep-cavity cover part has low precision of the machined wall thickness and can not meet the requirement.
Disclosure of Invention
The invention aims to solve the problem of low wall thickness precision of the thin-wall deep cavity cover part molded surface machining, an inner support tool structure is designed and distinguished, and a sectional horizontal milling method corresponding to the tool is adopted to perform outer surface milling, so that a thin-wall high-precision part is prepared.
The purpose of the invention is realized by the following technical scheme.
The utility model provides a thin wall deep cavity cover class part processing frock, includes: the device comprises a left valve tool and a right valve tool, wherein the left valve tool and the right valve tool are divided into a plurality of sub-valves in the height direction, and the sub-valves of the left valve tool correspond to the sub-valves of the right valve tool one by one; set up screw hole or unthreaded hole on every lamella of left lamella frock, it is corresponding, set up unthreaded hole or screw hole on every lamella of right lamella frock, prop the screw rod in installing between screw hole and unthreaded hole, connect two corresponding lamellas and prop the screw rod and then adjust the interval and the support dynamics of these two lamellas in adjusting.
Furthermore, the outer molded surfaces of the left valve tool and the right valve tool are consistent with the inner molded surface of a thin-wall deep cavity cover product to be processed.
Furthermore, smooth contact surfaces are formed between the sub-petals of the left petal tool, and the upper and lower adjacent sub-petals can move relatively; smooth contact surfaces are arranged between the sub-petals of the right petal tool, and the upper and lower adjacent sub-petals can move relatively.
Furthermore, the heights of the sub-petals of the left petal tool are the same or different, and the heights of the sub-petals of the right petal tool are the same or different; the corresponding sub-lobe heights of the left lobe tool and the right lobe tool are the same.
Further, a 3-5mm distance is arranged between the left valve tool and the right valve tool.
The invention also provides a processing method of the thin-wall deep cavity cover part, which comprises the following steps:
(1) the internal stay frock structural design: designing an inner support tool for machining into a split structure, comprising: the device comprises a left valve tool and a right valve tool, wherein the left valve tool and the right valve tool are divided into a plurality of sub-valves in the height direction, and the sub-valves of the left valve tool correspond to the sub-valves of the right valve tool one by one; each sub-valve of the left valve tool is provided with a threaded hole or a unthreaded hole, correspondingly, each sub-valve of the right valve tool is provided with a unthreaded hole or a threaded hole, an inner supporting screw rod is arranged between the threaded hole and the unthreaded hole, the two corresponding sub-valves are connected, and the distance and the supporting force of the two sub-valves are further adjusted by adjusting the inner supporting screw rod;
(2) preparing an inner support tool: integrally processing an inner support tool blank according to the inner profile of a thin-wall deep cavity cover product to be processed, then cutting and splitting, and processing a 3-5mm interval between a left-flap tool and a right-flap tool; then threaded holes or unthreaded holes are processed on the sub-petals of the left petal tool and the right petal tool, and the surface roughness of the inner support tool blank is not more than 3.2 um;
(3) internal bracing tool clamping: placing an internal support tool in a thin-wall deep cavity cover product to be processed, and adjusting internal support screws on the sub-valve tools to enable the sub-valve tools to be in supporting fit with the inner profile of a processing part;
(4) processing a molded surface: milling an outer molded surface by adopting a horizontal milling method; when the outer surface is milled, the outer surface is corresponding to the split structure of the inner support tool in the height direction, and is processed in N sections, wherein N is the number of the sub-lobes of the inner support tool in the height direction; and adjusting an inner supporting screw on the corresponding sub-identification tool every time one section is processed, so that the sub-valve tool is completely supported and attached to the inner profile of the processing part.
Further, when the step (2) is used for cutting and splitting, the height range of each sub-lobe is controlled to be 50-100 mm.
Further, the outer molded surfaces of the left valve tool and the right valve tool are consistent with the inner molded surface of a thin-wall deep cavity cover product to be processed; smooth contact surfaces are formed between the sub-petals of the left petal tool, and the upper and lower adjacent sub-petals can move relatively; smooth contact surfaces are formed between the sub-petals of the right petal tool, and the upper and lower adjacent sub-petals can move relatively; the heights of the sub-petals of the left petal tool are the same or different, and the heights of the sub-petals of the right petal tool are the same or different; the corresponding sub-lobe heights of the left lobe tool and the right lobe tool are the same.
Furthermore, the supporting force of the sub-valve tool supported in the machining section can be adjusted at any time in the machining process.
Further, the left valve tool and the right valve tool are divided into 2-3 valves in the height direction.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention is mainly used for meeting the development requirements of special-shaped thin variable-wall deep cavity cover parts for heat-proof structures of certain military products and solving the practical engineering problem that the wall thickness precision of thin variable-wall thick parts is difficult to control.
(2) When the outer profile of the special-shaped thin variable-wall deep cavity cover is machined, the adopted internal support tool cannot be completely attached to each part in the deep cavity, so that the machining error is large, and the high-precision requirement is difficult to meet.
(3) The number and the height of the sub-petals can be flexibly designed according to the condition of the deep cavity cover, and fine processing is better realized.
Drawings
FIG. 1 is a schematic view of a split inner support tool of the present invention;
FIG. 2 is a schematic view of a profiled thin-walled variable wall thickness superalloy (Inconel 617) cover;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a cross-sectional view B-B of FIG. 4;
FIG. 6 is a view from the direction A of FIG. 4;
fig. 7 is a view from direction B of fig. 2.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1, the present invention provides a thin-wall deep-cavity cover part processing tool, including: the device comprises a left valve tool and a right valve tool, wherein the left valve tool and the right valve tool are divided into a plurality of sub-valves in the height direction, and the sub-valves of the left valve tool correspond to the sub-valves of the right valve tool one by one; set up screw hole or unthreaded hole on every lamella of left lamella frock, it is corresponding, set up unthreaded hole or screw hole on every lamella of right lamella frock, prop the screw rod in installing between screw hole and unthreaded hole, connect two corresponding lamellas and prop the screw rod and then adjust the interval and the support dynamics of these two lamellas in adjusting.
Preferably, the outer molded surfaces of the left valve tool and the right valve tool are consistent with the inner molded surface of a thin-wall deep cavity cover product to be processed.
Preferably, smooth contact surfaces are formed between the sub-petals of the left petal tool, and the upper and lower adjacent sub-petals can move relatively; smooth contact surfaces are arranged between the sub-petals of the right petal tool, and the upper and lower adjacent sub-petals can move relatively.
Preferably, the heights of the sub-petals of the left petal tool are the same or different, and the heights of the sub-petals of the right petal tool are the same or different; the corresponding sub-lobe heights of the left lobe tool and the right lobe tool are the same.
Preferably, a 3-5mm distance is arranged between the left valve tool and the right valve tool.
According to the tool, the invention provides a method for processing a thin-wall deep cavity cover part, which comprises the following steps:
(1) the internal stay frock structural design: designing an inner support tool for machining into a split structure, comprising: the device comprises a left valve tool and a right valve tool, wherein the left valve tool and the right valve tool are divided into a plurality of sub-valves in the height direction, and the sub-valves of the left valve tool correspond to the sub-valves of the right valve tool one by one; each sub-valve of the left valve tool is provided with a threaded hole or a unthreaded hole, correspondingly, each sub-valve of the right valve tool is provided with a unthreaded hole or a threaded hole, an inner supporting screw rod is arranged between the threaded hole and the unthreaded hole, the two corresponding sub-valves are connected, and the distance and the supporting force of the two sub-valves are further adjusted by adjusting the inner supporting screw rod;
the outer molded surfaces of the left valve tool and the right valve tool are consistent with the inner molded surface of a thin-wall deep cavity cover product to be processed; smooth contact surfaces are formed between the sub-petals of the left petal tool, and the upper and lower adjacent sub-petals can move relatively; smooth contact surfaces are formed between the sub-petals of the right petal tool, and the upper and lower adjacent sub-petals can move relatively; the heights of the sub-petals of the left petal tool are the same or different, and the heights of the sub-petals of the right petal tool are the same or different; the corresponding sub-lobe heights of the left lobe tool and the right lobe tool are the same.
(2) Preparing an inner support tool: integrally processing an inner support tool blank according to the inner profile of a thin-wall deep cavity cover product to be processed, then cutting and splitting, and processing a 3-5mm interval between a left-flap tool and a right-flap tool; then threaded holes or unthreaded holes are processed on the sub-petals of the left petal tool and the right petal tool, and the surface roughness of the inner support tool blank is not more than 3.2 um;
when cutting and splitting are carried out, the height range of each sub-lobe is controlled to be 50-100 mm.
(3) Internal bracing tool clamping: placing an internal support tool in a thin-wall deep cavity cover product to be processed, and adjusting internal support screws on the sub-valve tools to enable the sub-valve tools to be in supporting fit with the inner profile of a processing part;
(4) processing a molded surface: milling an outer molded surface by adopting a horizontal milling method; when the outer surface is milled, the outer surface is corresponding to the split structure of the inner support tool in the height direction, and is processed in N sections, wherein N is the number of the sub-lobes of the inner support tool in the height direction; and adjusting an inner supporting screw on the corresponding sub-identification tool every time one section is processed, so that the sub-valve tool is completely supported and attached to the inner profile of the processing part. The supporting force of the sub-valve tool supported in the machining section can be adjusted at any time in the machining process.
Examples
By adopting the method, the milling processing of the outer profile of the special-shaped thin variable-wall high-temperature alloy (Inconel 617) cover of FIG. 2 (wherein, FIG. 2(a) is a model diagram, and FIG. 2(b) is a schematic structural diagram) is completed, and the specific steps are as follows:
(1) the structural design of the tool is as follows: according to fig. 1, the inner support tool for processing is designed into a split structure, 3 petals are arranged in the height direction, 2 petals are arranged in the left direction and the right direction, 6 petals are arranged, a threaded hole is formed in the right petal, a unthreaded hole is formed in the corresponding position of the left petal and used for mounting an inner support screw, and the outer surface of the tool is consistent with the inner profile of a processed product. The left and top views of the profiled thin-walled superalloy (Inconel 617) cap are shown in fig. 3 and 4, respectively. Fig. 5 is a sectional view B-B of fig. 4. Fig. 6 is a view from direction a of fig. 4. Fig. 7 is a view from direction B of fig. 2.
(2) Preparing a tool: and (3) integrally processing a tool blank according to the inner profile of the product, then cutting and splitting the tool blank according to the design structure in the step (1), then processing an M10 threaded hole on the tool of the right flap, and processing a phi 11mm unthreaded hole at the corresponding position on the left flap. The distance between the left part and the right part is 3 mm.
(3) Tool clamping: and arranging an internal support tool in the processed product, adjusting an internal support screw on each petal tool to enable each petal tool to be basically supported and attached to the inner profile of the processed part, and then fixing the tool and the product on the working table of the horizontal milling machine tool.
(4) Processing a molded surface: (3) and after the steps are finished, milling the outer molded surface by adopting a horizontal milling method. When the outer profile is milled, the outer profile corresponds to the split structure of the inner support tool in the height direction, the outer profile is processed in 3 sections, the lowest section is processed firstly, then the middle section is processed, and the highest section is processed. And adjusting an inner support screw on the corresponding distinguishing tool every section to completely support and attach the valve tool to the inner profile of the processing part until the outer profile is processed. The supporting force of the sub-valve tool supported in the machining section can be adjusted at any time in the machining process. The precision of the finally processed cover-shaped product completely meets the requirement and is greatly higher than the processing precision in the prior art.
Claims (10)
1. The utility model provides a thin wall deep cavity cover class spare processing frock which characterized in that includes: the device comprises a left valve tool and a right valve tool, wherein the left valve tool and the right valve tool are divided into a plurality of sub-valves in the height direction, and the sub-valves of the left valve tool correspond to the sub-valves of the right valve tool one by one; set up screw hole or unthreaded hole on every lamella of left lamella frock, it is corresponding, set up unthreaded hole or screw hole on every lamella of right lamella frock, prop the screw rod in installing between screw hole and unthreaded hole, connect two corresponding lamellas and prop the screw rod and then adjust the interval and the support dynamics of these two lamellas in adjusting.
2. The thin-wall deep cavity cover machining tool according to claim 1, characterized in that: the outer molded surfaces of the left valve tool and the right valve tool are consistent with the inner molded surface of a thin-wall deep cavity cover product to be processed.
3. The thin-wall deep cavity cover machining tool according to claim 1, characterized in that: smooth contact surfaces are formed between the sub-petals of the left petal tool, and the upper and lower adjacent sub-petals can move relatively; smooth contact surfaces are arranged between the sub-petals of the right petal tool, and the upper and lower adjacent sub-petals can move relatively.
4. The thin-wall deep cavity cover machining tool according to claim 1, characterized in that: the heights of the sub-petals of the left petal tool are the same or different, and the heights of the sub-petals of the right petal tool are the same or different; the corresponding sub-lobe heights of the left lobe tool and the right lobe tool are the same.
5. The thin-wall deep cavity cover machining tool according to claim 1, characterized in that: and a 3-5mm distance is arranged between the left valve tool and the right valve tool.
6. A processing method of a thin-wall deep cavity cover part is characterized by comprising the following steps:
(1) the internal stay frock structural design: designing an inner support tool for machining into a split structure, comprising: the device comprises a left valve tool and a right valve tool, wherein the left valve tool and the right valve tool are divided into a plurality of sub-valves in the height direction, and the sub-valves of the left valve tool correspond to the sub-valves of the right valve tool one by one; each sub-valve of the left valve tool is provided with a threaded hole or a unthreaded hole, correspondingly, each sub-valve of the right valve tool is provided with a unthreaded hole or a threaded hole, an inner supporting screw rod is arranged between the threaded hole and the unthreaded hole, the two corresponding sub-valves are connected, and the distance and the supporting force of the two sub-valves are further adjusted by adjusting the inner supporting screw rod;
(2) preparing an inner support tool: integrally processing an inner support tool blank according to the inner profile of a thin-wall deep cavity cover product to be processed, then cutting and splitting, and processing a 3-5mm interval between a left-flap tool and a right-flap tool; then threaded holes or unthreaded holes are processed on the sub-petals of the left petal tool and the right petal tool, and the surface roughness of the inner support tool blank is not more than 3.2 um;
(3) internal bracing tool clamping: placing an internal support tool in a thin-wall deep cavity cover product to be processed, and adjusting internal support screws on the sub-valve tools to enable the sub-valve tools to be in supporting fit with the inner profile of a processing part;
(4) processing a molded surface: milling an outer molded surface by adopting a horizontal milling method; when the outer surface is milled, the outer surface is corresponding to the split structure of the inner support tool in the height direction, and is processed in N sections, wherein N is the number of the sub-lobes of the inner support tool in the height direction; and adjusting an inner supporting screw on the corresponding sub-identification tool every time one section is processed, so that the sub-valve tool is completely supported and attached to the inner profile of the processing part.
7. The method for machining the thin-wall deep cavity cover part according to claim 6, wherein the method comprises the following steps: and (3) when the cutting and splitting are carried out in the step (2), the height range of each sub-lobe is controlled to be 50-100 mm.
8. The method for machining the thin-wall deep cavity cover part according to claim 6, wherein the method comprises the following steps: the outer molded surfaces of the left valve tool and the right valve tool are consistent with the inner molded surface of a thin-wall deep cavity cover product to be processed; smooth contact surfaces are formed between the sub-petals of the left petal tool, and the upper and lower adjacent sub-petals can move relatively; smooth contact surfaces are formed between the sub-petals of the right petal tool, and the upper and lower adjacent sub-petals can move relatively; the heights of the sub-petals of the left petal tool are the same or different, and the heights of the sub-petals of the right petal tool are the same or different; the corresponding sub-lobe heights of the left lobe tool and the right lobe tool are the same.
9. The method for machining the thin-wall deep cavity cover part according to claim 6, wherein the method comprises the following steps: the supporting force of the sub-valve tool supported in the machining section can be adjusted at any time in the machining process.
10. The method for machining the thin-wall deep cavity cover part according to claim 6, wherein the method comprises the following steps: the left valve tool and the right valve tool are divided into 2-3 valves in the height direction.
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| CN202111160854.2A CN113798883B (en) | 2021-09-30 | 2021-09-30 | Machining tool and machining method for outer surface of thin-wall deep cavity cover piece |
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| CN202111160854.2A CN113798883B (en) | 2021-09-30 | 2021-09-30 | Machining tool and machining method for outer surface of thin-wall deep cavity cover piece |
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| CN113798883B CN113798883B (en) | 2024-05-14 |
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Cited By (1)
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| CN114211189A (en) * | 2021-12-30 | 2022-03-22 | 武汉武船重型装备工程有限责任公司 | Method for machining high-precision inner molded surface |
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