CN113348744B - Pneumatic internal supporting device for thin-wall cabin - Google Patents
Pneumatic internal supporting device for thin-wall cabin Download PDFInfo
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- CN113348744B CN113348744B CN201518006731.2A CN201518006731A CN113348744B CN 113348744 B CN113348744 B CN 113348744B CN 201518006731 A CN201518006731 A CN 201518006731A CN 113348744 B CN113348744 B CN 113348744B
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Abstract
The utility model provides a pneumatic internal stay device of thin wall cabin body, includes the positioning seat, pneumatic four claws, the fagging, and manual switch valve, pneumatic internal stay device passes through the positioning seat location is on basic plane, through manual switch valve makes to compressed gas's control the fagging of pneumatic four claws struts retractably in order to support the thin wall cabin body. According to the pneumatic internal bracing device for the thin-wall cabin body, the problems that when the thin-wall cabin body is milled, the cutting force is large, the machining precision of a blind groove and a mouth frame of the cabin body is difficult to guarantee due to poor system rigidity, vibration and elastic deformation of the thin-wall cabin body during milling are solved, and the problem that a milling tool without bracing in an inner cavity of the cabin body is generally adopted in the past is solved.
Description
Technical Field
The invention relates to a thin-wall cabin body, in particular to a titanium alloy cabin body with a complex inner cavity structure.
Background
Cabin machining is particularly important in tactical missile types. As is known, the structural components of a missile are composed of a plurality of pods, as well as a body, airfoils, control surfaces and a seeker. Along with the increase of the range, the speed of the missile is higher and higher, the wall thickness of the cabin body is required to be thinner and thinner, heat-resistant high-strength light materials are more and more adopted, titanium alloy materials are generally used for the cabin body of the air-space missile, holes, grooves, notches and opening frames required to be processed on the cabin body are more and more complex, when the opening frames and the holes are processed, the cabin body needs to be positioned and fixed on the table board of a machine tool, in the past, the common method for processing, positioning and fixing the cabin body is to position an inner hole of the cabin body at one end, a screw rod with the height being longer than that of the cabin body is penetrated in the middle of a chassis, after the cabin body is sleeved into the tool, a pressure plate is arranged at the upper end of the screw rod and presses the port of the inner hole at the upper end of the cabin body (as shown in figures 1, 2 and 3), because the cabin body is a thin-wall part, the rigidity of the system is poor, when the cabin body is processed, only by pressing the two ends of the cabin body, and no support is arranged in the middle of the cabin body, the cabin body has a middle bulge (as shown in figure 4), and the problems of large processing deformation and large elastic resilience during processing (as shown in figure 5) of the thin-wall cabin body due to poor system rigidity are not well solved.
The parts to be processed are titanium alloy cabin bodies, the titanium alloy cabin bodies are typical materials which are difficult to add, and the processing positions in the working procedure are long step blind grooves, opening frames and all inner holes which are 200mm away from the upper end face of the cabin body and 140mm away from the lower end face of the cabin body and have the total length of 500 mm. The part is positioned on a tool (see figures 1, 2 and 3) by an inner hole at the lower end of the cabin body and the lower end surface, the upper end surface of the cabin body is pressed by a pressing plate through a screw rod, the part with better rigidity can be milled, but the part has large diameter and thin wall, the vertical cabin body has too long hanging wall, the clamping force is pressed to a thin-wall part with poorer rigidity of the part in the positive direction, the middle part of the cabin body is a cylinder formed by rolling and longitudinally welding a titanium alloy thin plate with 1.5mm, and then thicker flange parts are welded at the upper end and the lower end of the cylinder, the length of the cylinder is 528mm, when the cabin body is pressed in the positive direction, the middle part of the cabin body is hollow, and the rigid weak part at the middle part is not protruded outwards due to no support or clamping, so that the blind slot is milled to be penetrated when the blind slot is milled, and the wall thickness of the milled blind slot is not uniform. The titanium alloy material has large cutting force, the cabin body has poor rigidity, the pressing force of vertical clamping is not easy to control, the middle part of the cabin body swells and deforms (see figure 4) due to too large pressing force, and the upper end part of the cabin body bends and deforms (see figure 5) due to too large vibration.
Disclosure of Invention
The invention aims to fill the blank at home and abroad aiming at the prior art, provides a radio height measurement device based on beam self-adaptive adjustment, solves the high-precision height measurement and stable tracking technology under complex sea conditions and complex electromagnetic interference, and meets the high-precision height measurement requirements of a new generation of intelligent stealth anti-ship missile under the conditions of large height measurement range, ultra-low altitude and high sea.
In order to achieve the purpose, the pneumatic internal supporting device of the thin-wall cabin comprises a positioning seat, pneumatic four claws, a supporting plate and a manual switch valve, wherein the pneumatic internal supporting device is positioned on a basic plane through the positioning seat, and the supporting plate of the pneumatic four claws can be retractably supported through the control of the manual switch valve on compressed air so as to support the thin-wall cabin.
In some embodiments, three of the pneumatic four-jaws are included.
In some embodiments, the manual switch valve further comprises a filter, and when the manual switch valve is turned to the on state, the compressed air enters the filter for filtering.
In some embodiments, the compressed air is connected to a plurality of the pneumatic four-jaws through an air inlet pipe.
In some embodiments, a cartoon type straight-through pipe joint is arranged on the air inlet pipe.
In some embodiments, the bracing plates on the four-jaw clamping feet are supported on the inner wall of the cabin body in an extending state.
According to the pneumatic internal bracing device for the thin-wall cabin body, the problems that when the thin-wall cabin body is milled, the cutting force is large, the machining precision of a blind groove and a mouth frame of the cabin body is difficult to guarantee due to poor system rigidity, vibration and elastic deformation of the thin-wall cabin body during milling are solved, and the problem that a milling tool without bracing in an inner cavity of the cabin body is generally adopted in the past is solved.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
Drawings
The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which
FIG. 1 is a view of a part processing tool of an original cabin;
FIG. 2 is a schematic view of an original tooling clamping simple cabin;
FIG. 3 is a schematic view of a processing blind groove of an original tooling clamping complex cabin body;
FIG. 4 is a schematic view of the cabin being protruded outwards from the middle under the pressing force;
FIG. 5 is a schematic view of bending deformation caused by cutting force;
fig. 6 is a diagram showing the structure of an apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in more detail hereinafter with reference to the accompanying drawings of specific embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to the drawings, a pneumatic internal supporting device of a thin-wall cabin according to an embodiment of the invention is described in detail, and the pneumatic internal supporting device comprises a positioning seat, pneumatic four claws, a supporting plate and a manual switch valve, wherein the pneumatic internal supporting device is positioned on a base plane through the positioning seat, and the supporting plate of the pneumatic four claws can be retractably spread through the control of compressed air through the manual switch valve so as to support the thin-wall cabin.
The parts to be processed are titanium alloy cabin bodies, the titanium alloy is a typical difficult-to-process material, and the processing positions in the working procedure are long step blind grooves, opening frames and all inner holes, wherein the blind grooves are 200mm away from the upper end surface of the cabin body, and the blind grooves are 140mm away from the lower end surface of the cabin body and have the total length of 500 mm. The part is positioned on a tool (see figures 1, 2 and 3) by an inner hole at the lower end of the cabin body and the lower end surface, the upper end surface of the cabin body is pressed by a pressing plate through a screw rod, the part with better rigidity can be milled, but the part has large diameter and thin wall, the vertical cabin body has too long hanging wall, the clamping force is pressed to a thin-wall part with poorer rigidity of the part in the positive direction, the middle part of the cabin body is a cylinder formed by rolling and longitudinally welding a titanium alloy thin plate with 1.5mm, and then thicker flange parts are welded at the upper end and the lower end of the cylinder, the length of the cylinder is 528mm, when the cabin body is pressed in the positive direction, the middle part of the cabin body is hollow, and the rigid weak part at the middle part is not protruded outwards due to no support or clamping, so that the blind slot is milled to be penetrated when the blind slot is milled, and the wall thickness of the milled blind slot is not uniform. The titanium alloy material has large cutting force, the cabin body has poor rigidity, the pressing force of vertical clamping is not easy to control, the middle part of the cabin body swells and deforms (see figure 4) due to too large pressing force, and the upper end part of the cabin body bends and deforms (see figure 5) due to too large vibration.
At present, a conventional cabin body processing clamping method is generally adopted, namely a cabin body is vertically fixed on a machine tool processing table board by using a clamp before processing. For titanium alloy thin-wall parts, the clamping force is too large, so that the parts deform greatly, and the clamping cannot be realized when the clamping force is too small. The clamping force still remains in the sense of not reaching the theoretical height, the clamping force is not quantized, and the deformation after clamping cannot be predicted, so that the optimal design of a clamping tool is difficult to achieve, and the designed tool can bring large deformation of a titanium alloy thin-wall part to influence the processing quality and efficiency. The whole cabin body is 761.9mm in total length, a milling clamp is arranged at the bottom of the cabin body, the total height reaches 850mm, when the end face of a milling cutter is milled at the upper part of the cabin body, the feeding direction of the milling cutter is perpendicular to the axis of the cabin body, the milling force is perpendicular to the cabin body, a large couple is formed between the cutting force and the bottom of the cabin body, intense vibration is easily caused, when materials with large volume allowance such as grooves and planes are removed, the rigidity is poorer, when the clamping force of a nut connected with a tool screw at the upper end of the cabin body is too large, large internal stress can be caused in the cabin body, vibration is intense, the cabin body is locally deformed (protrudes outwards) under the action of the internal stress, when a machined surface protruding outwards is milled, the size becomes thinner, and the size is difficult to control. Therefore, when the numerical control milling blind slot is machined, part of the blind slot cannot be machined in place, and some blind slots are already over-cut or even milled through.
The details and operation of the apparatus according to the present invention are described in detail below with reference to fig. 6.
As shown in fig. 6, the device comprises a positioning seat 1, an air inlet joint 2, a stand column 3, a sleeve I4, a positioning plate I5, a sleeve II6, a pneumatic four-claw 7, a supporting plate 8, an air inlet pipe 9, an air inlet joint II10, a sleeve III11, a sleeve IV12, a positioning plate II13, a bolt 14, a cover plate 15, a bolt 16, an air outlet pipe 17, an air outlet joint 18, a filter 19 and a hand-operated valve 20.
Firstly, the positioning core seat is connected on the positioning base by using a hexagon bolt, and the positioning core seat is provided with
For mounting four diameters of
The solid polish rod-upright post with a length of 712 mm is pressed into the positioning seat
The through hole is fastened on the positioning seat by a hexagon bolt by utilizing an M8 threaded inner hole on the end surface of the polish rod.
The height of the sleeve is calculated at the specific part of the cabin inner cavity support by the supporting plate according to the structure of the cabin inner cavity, and the tool is provided with four groups of sleeves with different heights. Four sleeves are arranged in each group, and the sleeves mainly play a role in supporting the positioning plate in a balanced and equal-height mode. The four sleeves of each group are respectively sleeved into the four upright posts which are installed and fixed on the positioning seat to support the positioning plate, pneumatic four claws are installed on the positioning plate, and four supporting blocks are installed on the claws of the four claws. And fixing the cover plate fixing plate on the four upright posts by using bolts.
The structure has the advantages that: 1. the structural form of the upright post and the sleeve is utilized to replace a conventionally used step shaft; 2. the structure is simple, the clamping device can be adjusted (by utilizing different heights of the sleeve), and the clamping mode is adopted, so that the clamping device is rarely seen in domestic markets; 3. the mechanical internal support structure is replaced by the pneumatic internal support mechanism, so that the device is light, flexible and low in cost;
when the adjustable pressure of the pressure control pump is opened, 4-6 Mpa low-pressure air is output, the compressed air is connected into a filter, the compressed air enters the filter to filter out moisture and impurities in the compressed air, the air coming out of the filter is connected with a pressure gauge, the pressure gauge connected behind the filter is adjusted to a calculated pressure value (the pressure is the force acting on the inner wall of a cabin body through a support rod), the compressed air of the pressure enters a three-position four-way clamp-type switch to transmit the compressed air to three groups of pneumatic four claws connected in parallel, when a manual valve is opened, the compressed air enters a fixed joint of a positioning core seat (the fixed joint is adopted to avoid the phenomenon that a pipe is damaged by torsion generated by rotation during working so as to cause air leakage, the fewer joints are adopted, the air leakage is less, and the high position is connected into the pneumatic four claws through the air inlet pipe, the four supporting plates connected to each group of pneumatic four claws are controlled to extend out to prop against the inner wall of the cabin body, so that the three groups of pneumatic four claws adopt a parallel connection mode, the four supporting plates on the three groups of pneumatic four claws have the same force bearing capacity, and simultaneously extend out to press the inner wall of the cabin body; when the manual valve switch is turned off, compressed air is turned off, the three groups of pneumatic four claws retract, the nuts on the cover plate of the tool can be dismounted, and the cabin body can be taken out.
The device comprises three pneumatic four claws 7, when a manual switch valve 20 is turned to an open state, compressed air enters a filter 19, clean compressed air enters an air inlet pipe 9 after passing through the filter, the clean compressed air passes through a cartoon type straight-through pipe joint 2, the air inlet pipe 9 and an air inlet pipeline of the pneumatic four claws 7, a supporting plate connected to four claw clamping feet is extended out and is supported on the inner wall of a cabin body, when the manual switch valve 20 is screwed to move towards the open state, the clamping feet are expanded from the radial direction, the supporting mechanism is adopted, the parts are not over-positioned, the rigidity of the parts can be increased, the problem of long cantilever is solved, the cabin body is fluttered during processing, and the processing precision is ensured during milling. Meanwhile, the clamping and the disassembly are convenient.
The contact stress area of the inner arm of the cabin is increased by adopting twelve supporting blocks, so that the inner wall of the thin-wall cabin is supported, the rigidity of a system of the whole cabin is enhanced, and the vibration of cutting force is counteracted.
The innovation points of the pneumatic internal supporting device are as follows:
1) the supporting positions are divided into a plurality of sections, and the positions of the supporting points are adjusted according to the structure of the inner cavity of the cabin body.
2) For different cabin body diameters, the supporting block can be adjusted by only changing the extension length of the supporting block.
3) For different conditions of the interior of the cabin body, the contact surface between the supporting block and the inner wall of the cabin body can be flexibly adjusted (the contact surface can be adjusted according to the actual conditions of the interior of the cabin body and can be wide or narrow).
4) The supporting force is adjustable. The size of the supporting force is adjusted and controlled by different air pressures, the size of the supporting force is easy to control and master, and meanwhile, the pneumatic support is firm. The supporting force is controllable, designable, adjustable and masterable. Flexible application and labor saving.
5) The four upright post pull rods and the pressure plate are utilized, one-pressing one-pulling is adopted, acting force and reacting force are balanced to act on the four upright posts, and finally a workpiece is clamped, so that the work can be carried out; when the cabin body is disassembled, the cabin body can be taken out only by screwing down the nut and the pressing plate, and the external pressing plate is not needed, so that the problem that the cabin body is interfered or interfered by the external pressing plate is avoided.
According to the pneumatic internal bracing device for the thin-wall cabin body, the problems that when the thin-wall cabin body is milled, the cutting force is large, the machining precision of a blind groove and a mouth frame of the cabin body is difficult to guarantee due to poor system rigidity, vibration and elastic deformation of the thin-wall cabin body during milling are solved, and the problem that a milling tool without bracing in an inner cavity of the cabin body is generally adopted in the past is solved.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. The technical solutions available to a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concept of the present invention are all within the scope of protection defined by the claims.
Claims (6)
1. The pneumatic internal support device of the thin-wall cabin is characterized by comprising a positioning seat, four pneumatic claws, a supporting plate and a manual switch valve, wherein the pneumatic internal support device is positioned on a basic plane through the positioning seat, and the supporting plate of the four pneumatic claws can be retractably supported through the control of the manual switch valve on compressed air so as to support the thin-wall cabin.
2. The pneumatic internal stay device of claim 1 including three said pneumatic four-paws.
3. The pneumatic internal stay device of claim 2, further comprising a filter, wherein compressed air enters the filter for filtering when the manual switch valve is turned to an on state.
4. The pneumatic internal stay device of claim 3, wherein the compressed gas is connected to the plurality of pneumatic four-claws through an intake pipe.
5. The pneumatic inner supporting device as claimed in claim 4, wherein a through pipe joint is arranged on the air inlet pipe.
6. The pneumatic internal bracing device according to claim 4, wherein the bracing plates on the four-jaw clamping feet are braced to the inner wall of the cabin body in the extended state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201518006731.2A CN113348744B (en) | 2015-11-10 | 2015-11-10 | Pneumatic internal supporting device for thin-wall cabin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201518006731.2A CN113348744B (en) | 2015-11-10 | 2015-11-10 | Pneumatic internal supporting device for thin-wall cabin |
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| CN113348744B true CN113348744B (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967896A (en) * | 2021-01-29 | 2022-01-25 | 航天智造（上海）科技有限责任公司 | Combined multistage expansion positioning mandrel |
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2015
- 2015-11-10 CN CN201518006731.2A patent/CN113348744B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113967896A (en) * | 2021-01-29 | 2022-01-25 | 航天智造（上海）科技有限责任公司 | Combined multistage expansion positioning mandrel |
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