阅读说明：本技术 一种薄壁深腔罩类件外型面加工工装及加工方法 (Tool and method for machining outer surface of thin-wall deep-cavity cover part ) 是由 李启军 张亚莲 黄啸辰 韩冬峰 沈正章 马鹏程 常若寒 朱兆旭 王勇 侯子义 于 2021-09-30 设计创作，主要内容包括：本发明涉及一种薄壁深腔罩类件外型面加工工装及加工方法,属于先进制造技术领域。该加工工装结构设计为内撑结构工装,工装上下、左右分瓣,整体外形符合内型面,分瓣上设置内撑螺纹孔,用于安装内撑螺杆,通过调整内撑螺杆,以使工装与加工部位内型面完全支撑贴合。加工时将需加工型面按工装分瓣区分区进行铣加工,加工过程中可以随时通过调整分瓣工装与加工区内型面支撑贴合度,减小加工退让、回弹,提高壁厚精度。本发明用途主要是为了满足某些防热结构用异型薄变壁深腔罩类件研制需求,解决薄变壁厚类零件壁厚精度难控制的实际工程问题。(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.)

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.

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.