CN114227312A - Clamping device and clamping method for 3D printing wing rudder type structural member - Google Patents
Clamping device and clamping method for 3D printing wing rudder type structural member Download PDFInfo
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- CN114227312A CN114227312A CN202111580325.8A CN202111580325A CN114227312A CN 114227312 A CN114227312 A CN 114227312A CN 202111580325 A CN202111580325 A CN 202111580325A CN 114227312 A CN114227312 A CN 114227312A
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- wing rudder
- upper pressure
- pressure plate
- plate
- printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Mechanical Engineering (AREA)
Abstract
The invention discloses a 3D printing wing rudder type structural member clamping device which comprises an upper pressing plate, a lower supporting plate and a positioning pin, wherein the upper pressing plate is provided with a first clamping groove; the shape of the upper pressure plate is the same as that of the wing rudder, the right-angle sides at two adjacent sides are used for aligning the tooling, and the bottom of the upper pressure plate is processed into a profile following the upper profile of the wing rudder; a lower support plate: the upper pressure plate is the same as the upper pressure plate in size, a plurality of weight reduction grooves are formed in the upper pressure plate, a molded surface following the lower molded surface of the wing rudder is processed at the upper part of the upper pressure plate, and a rib supporting block and a butt joint groove supporting block are arranged in the middle of the upper pressure plate and correspond to the rib and the butt joint groove in the wing rudder respectively in position and are used for supporting the lower molded surface of the wing rudder, and gaps are reserved at other positions; the positioning pins are arranged in corresponding positioning holes formed in the upper pressure plate and the lower supporting plate to position the upper pressure plate and the lower supporting plate. The wing rudder type structure member rapid clamping and positioning device is simple in structure and high in reliability, achieves rapid clamping and positioning of the wing rudder type structure member by means of profile positioning, and achieves accurate reference establishment of the wing rudder type structure member by scanning the reference block.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and relates to a clamping device and a clamping method for a 3D printing wing rudder type structural member.
Background
The airfoil parts have wide requirements in the fields of aviation and aerospace, and the parts are mostly thin-walled complex special-shaped profile structures. The common methods include machining and forming by using the allowance left on the surface of a casting, directly machining and forming a plate material and the like, and the methods have longer machining period due to larger allowance of the molded surface. The intellectual achievement provides a new process method, the part blank is formed by 3D printing, no machine allowance is left on the molded surface, and only the machine allowance is left on the assembly characteristic, so that the cutting time can be effectively reduced. However, 3D printing also has its own processing features: (1) the clamping of the special-shaped structural part is difficult due to the fact that the process chuck cannot be cast; (2) the profile precision and the theoretical model have little deviation, so that the deviation is brought by utilizing the shape clamping positioning; (3) the precision of the outline has precision deviation, for example, the defect phenomenon is easy to occur in the area with the wall thickness less than 1, and the deformation exists in the large-size part, so that the precision of the outline alignment is influenced; (4) if the special-shaped thin-wall part is clamped by a jack, the workload of clamping and aligning operation is high, the deformation phenomenon is easy to occur due to improper clamping force, and the requirement of high profile precision of wing rudder type structural parts cannot be met. Therefore, a clamping and aligning method applied to a 3D printing wing rudder type structural member needs to be designed, so that the aligning precision is improved, the clamping difficulty is reduced, and the quality requirement of a product is met.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: the clamping device and the clamping method for the 3D printing wing rudder type structural member meet the requirements of high alignment precision and quality of parts.
(II) technical scheme
In order to solve the technical problem, the invention provides a 3D printing wing rudder type structural part clamping device which comprises an upper pressure plate 1, a lower support plate 2 and a positioning pin 3; the shape of the upper pressure plate 1 is the same as the wing rudder structure, the right-angle sides at two adjacent sides are used for aligning the tooling, and the bottom is processed into a profile following the upper profile of the wing rudder; the lower support plate 2: the upper pressure plate 1 has the same size as the upper pressure plate, a plurality of weight reduction grooves are arranged on the upper pressure plate, a molded surface following the lower molded surface of the wing rudder is processed at the upper part, a rib supporting block and a butt joint groove supporting block are arranged in the middle and respectively correspond to the positions of ribs and the butt joint grooves in the wing rudder and are used for supporting the lower molded surface of the wing rudder, and gaps are reserved at other positions; the positioning pin 3 is arranged in corresponding positioning holes formed in the upper pressure plate 1 and the lower support plate 2 to position the upper pressure plate 1 and the lower support plate 2.
The invention also provides a 3D printing wing rudder type structural member clamping method, which comprises the following steps:
the method comprises the following steps: the lower supporting plate 2 is placed on a machine tool workbench and fixed, and the fixing can be realized by adopting a positioning key to position with a T-shaped groove of the workbench;
step two: placing the wing rudder type part 8 on the molded surface of the lower supporting plate 2, detecting the fit clearance of the molded surface, and moving the wing rudder type part 8 to enable the wing rudder type part 8 to fit the molded surface of the tool;
step three: the upper pressure plate 1 is placed on a wing rudder part 8, and the positioning of the upper pressure plate 1 and the lower support plate 2 is realized by 2 positioning pins 3;
step four: and (3) aligning the chord plane line of the wing rudder part 8, and fixing the tool and the part on a machine tool workbench together by using a pressing block 5, a bolt 6 and a jack 7.
(III) advantageous effects
The clamping device and the clamping method for the 3D printed wing rudder type structural member have the advantages of simple structure and high reliability, realize the rapid clamping and positioning of the wing rudder type structural member by profile positioning, and realize the accurate reference establishment of the wing rudder type structural member by scanning the reference block. The method has higher precision, can realize the requirement of the profile precision of the wing rudder type structural part, has less machining allowance compared with the traditional machining method of a casting blank or a plate blank, and greatly reduces the production period. The design is a simple, efficient, economical and practical design which is established aiming at the rapid clamping and reference of the special-shaped part.
Drawings
Fig. 1 is a schematic structural diagram of a 3D printing wing rudder type structural member clamping device;
FIG. 1 includes: 1, an upper pressing plate, 2, a lower supporting plate, 3 positioning pins, 4 backing plates, 5 pressing blocks, 6 bolts, 7 jacks and 8 workpieces.
Fig. 2 is an illustration of an upper platen.
Fig. 3 is a lower support plate illustration.
Fig. 4 shows the reference block and the scanning data of the wing rudder type structural member printed in 3D.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in fig. 1 to 3, the 3D printing wing rudder type structural member clamping device of the embodiment includes an upper pressure plate 1, a lower support plate 2, a positioning pin 3, a backing plate 4, a pressing block 5, a bolt 6, and a jack 7.
An upper pressure plate 1: the appearance is the same with wing rudder structure, and the right-angle side of adjacent both sides can be used to the alignment frock, and the bottom is processed into the profile along with the profile on the wing rudder.
The lower support plate 2: the upper pressing plate 1 has a same size with the upper pressing plate, a plurality of lightening grooves are arranged on the upper pressing plate, a molded surface following the lower molded surface of the wing rudder is processed on the upper part, a rib supporting block and a butt joint groove supporting block are arranged in the middle and correspond to the rib and the butt joint groove in the wing rudder respectively in position and are used for supporting the lower molded surface of the wing rudder, and gaps are reserved at other positions.
Positioning pin 3: the positioning device is arranged in corresponding positioning holes formed in the upper pressure plate 1 and the lower support plate 2, and the rapid positioning is realized by the cooperation of a small gap (gap 0.01), so that the relative movement is avoided. The two positioning pins 3 are arranged at intervals. On top board 1 and lower bolster 2, the locating hole is seted up on the locating surface, and the locating surface is the plane, lies in respectively on top board 1 and the lower bolster 2 in the banding region of one side.
The backing plate 4: the soft material such as asbestos rubber sheet can be adopted and pasted on the bottom profile of the upper pressing plate 1 for adapting to a small amount of deviation of the profile of the part.
Briquetting 5, bolt 6, jack 7 form the clamping subassembly, and the clamping subassembly has the multiunit, and the interval arrangement is on lathe and top board 1, realizes the clamping to part and lathe. The jack 7 is arranged on the machine tool, one end of the pressing block 5 is pressed on the upper pressing plate 1, and the other end of the pressing block is connected with the jack 7 through the bolt 6.
The clamping device realizes the quick positioning of the profiled surface allowance-free special-shaped wing rudder structural member through the profiled surface positioning; the device supporting positions are selected in the mounting groove area and the rib area, so that sufficient support is provided, and the overall reference cannot be changed due to local deviation; the base plate is made of rubber plates, and the soft material can adapt to a small amount of deformation of parts and can provide enough friction force.
Based on the clamping device, the invention also provides a clamping method for the 3D printed wing rudder type structural part, which mainly comprises the allowance requirement, the marking requirement, the operation flow and the alignment process of the blank of the 3D printed wing rudder type structural part.
Blank allowance requirements of the 3D printing wing rudder type structural part are as follows: the machine allowance is not reserved on the molded surface, the machine allowance is reserved only on the assembly characteristics, meanwhile, a reference block is arranged on the butt joint surface with the thicker thickness, and the reference block and the 3D printed wing rudder type structural member are formed together.
Marking requirements: before machining, a bench worker scribes chord plane lines of wing rudder type structural parts.
The clamping method for the 3D printed wing rudder type structural part comprises the following steps:
the method comprises the following steps: the lower supporting plate 2 is placed on a machine tool workbench and fixed, and the fixing can be realized by adopting a positioning key to position with a T-shaped groove of the workbench;
step two: the wing rudder part 8 is placed on the molded surface of the lower supporting plate 2, the molded surface fitting gap is detected, and the wing rudder part 8 is moved to realize the fitting of the wing rudder part 8 to the molded surface of the tool.
Step three: the upper pressure plate 1 is placed on the wing rudder part 8, and the upper pressure plate 1 and the lower support plate 2 are positioned by 2 positioning pins 3.
Step four: and (3) aligning the chord plane line of the wing rudder part 8, and fixing the tool and the part on a machine tool workbench together by using a pressing block 5, a bolt 6 and a jack 7.
In the second step, the wing rudder part 8 is placed on the molded surface of the lower support plate 2, and needs to be aligned, wherein the alignment process is as follows:
step S1: the method is characterized in that rectangular reference blocks are arranged in the butt joint surface area, which is in contact with a cabin section, of the wing rudder part 8, the length of each reference block is greater than 20mm, the width of each reference block is 10mm, the height of each reference block is 10mm higher than a molded surface, the reference blocks at 2 positions are arranged at two ends of the butt joint surface, and the reference blocks and the 3D printing wing rudder structure part are printed and molded simultaneously, as shown in fig. 4.
Step S2: the 3D printing wing rudder type structural part is printed and then is subjected to laser scanning together with the reference block, the laser scanning is compared with a theoretical blank model, after the molded surface fitting meets the machining precision requirement, the actual margin value of the reference block is marked, the 3D printing molding surface is selected at the marked position, and the surface attached to the substrate cannot be selected.
Step S3: after clamping on a machine tool, straightening the surface of the reference block, measuring the reference block through a dial indicator, and adjusting the B axis of the machine tool according to laser scanning data to enable the height difference of the surface of the reference block to be the same as the laser scanning data. Therefore, the theoretical value from the reference block to the wing tip is used for subtracting the actual margin value of the reference block, the actual value from the wing tip to the reference block is obtained according to the reference established by the reference block, and the reference of the part in the width direction is obtained. The method can effectively avoid alignment errors caused by contour deviation of the part.
Step S4: the actual removal amount of the part is determined according to the allowance of the laser scanning on the end surface in the length direction, and the reference of the part in the length direction is determined.
And after clamping of the airfoil-type special-shaped part is completed, machining can be started.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A3D printing wing rudder type structural member clamping device is characterized by comprising an upper pressing plate (1), a lower pressing plate (2) and a positioning pin (3); the shape of the upper pressure plate (1) is the same as the wing rudder structure, the right-angle sides at two adjacent sides are used for aligning the tooling, and the bottom of the upper pressure plate is processed into a profile following the upper profile of the wing rudder; lower support plate (2): the upper pressure plate (1) is the same in size as the upper pressure plate (1), a plurality of lightening grooves are formed in the upper pressure plate, a molded surface following the lower molded surface of the wing rudder is processed on the upper portion of the upper pressure plate, a rib supporting block and a butt joint groove supporting block are arranged in the middle of the upper pressure plate and correspond to the rib and the butt joint groove in the wing rudder respectively in position and are used for supporting the lower molded surface of the wing rudder, and gaps are reserved at other positions; the positioning pin (3) is arranged in corresponding positioning holes formed in the upper pressure plate (1) and the lower support plate (2) to position the upper pressure plate (1) and the lower support plate (2).
2. The 3D printing wing rudder type structural member clamping device according to claim 1, wherein the positioning pin (3) is matched with the upper pressure plate (1) and the lower support plate (2) by a small gap of 0.01 mm.
3. The 3D printing wing rudder type structural member clamping device is characterized in that two positioning pins (3) are arranged at intervals.
4. The 3D printing wing rudder type structural member clamping device according to claim 3, wherein the positioning holes are formed in the upper pressing plate (1) and the lower supporting plate (2) and are positioned on positioning surfaces, and the positioning surfaces are planes and are respectively positioned in the strip-shaped areas on the same side of the upper pressing plate (1) and the lower supporting plate (2).
5. The 3D printing wing rudder type structural member clamping device according to claim 4, further comprising: the backing plate (4) is made of soft asbestos rubber sheet materials, is adhered to the bottom profile of the upper pressing plate (1) and is used for adapting to a small amount of deviation of the profile of the part.
6. The 3D printing wing rudder type structural member clamping device according to claim 5, further comprising: the clamping assemblies are arranged on the machine tool and the upper pressing plate (1) at intervals, so that parts and the machine tool can be clamped.
7. The clamping device for the 3D printing wing rudder type structural member is characterized in that the clamping assembly comprises a pressing block (5), a bolt (6) and a jack (7), the jack (7) is arranged on the machine tool, one end of the pressing block (5) is pressed on the upper pressing plate (1), and the other end of the pressing block (5) is connected with the jack (7) through the bolt (6).
8. A clamping method for a 3D printed wing rudder type structural part is characterized by comprising the following steps:
the method comprises the following steps: the lower supporting plate (2) is placed on a machine tool workbench and fixed, and the fixing can be realized by adopting a positioning key to position with a T-shaped groove of the workbench;
step two: placing the wing rudder type part (8) on the molded surface of the lower supporting plate (2), detecting the fit clearance of the molded surface, and moving the wing rudder type part (8) to fit the molded surface of the tool;
step three: the upper pressure plate (1) is placed on a wing rudder part (8), and the upper pressure plate (1) and the lower support plate (2) are positioned by using 2 positioning pins (3);
step four: the chord plane line of a wing rudder part (8) is aligned, and the tool and the part are fixed on a machine tool workbench together by a pressing block (5), a bolt (6) and a jack (7).
9. The 3D printing wing rudder type structural member clamping device according to claim 8, wherein in the second step, when the wing rudder type part (8) is placed on the molded surface of the lower support plate (2), the alignment is performed in the following process:
step S1: the method comprises the following steps that rectangular reference blocks are arranged in a butt joint surface area, which is in contact with a cabin section, on a wing rudder part (8), the length is greater than 20mm, the width is 10mm, the height is 10mm higher than a molded surface, 2 reference blocks are arranged at two ends of the butt joint surface, and the reference blocks and a 3D printing wing rudder structural part are printed and molded simultaneously;
step S2: after the 3D printing wing rudder type structural member is printed, laser scanning is carried out on the wing rudder type structural member and the reference block together, the wing rudder type structural member and the reference block are compared with a theoretical blank model, after the molded surface fitting meets the machining precision requirement, the actual margin value of the reference block is marked, the marked position selects a 3D printing molding surface, and the surface which is attached to the substrate cannot be selected;
step S3: after clamping on a machine tool, straightening the surface of the reference block, measuring the reference block through a dial indicator, and adjusting a B axis of the machine tool according to laser scanning data to enable the height difference of the surface of the reference block to be the same as the laser scanning data; subtracting the actual residual value of the reference block from the theoretical value from the reference block to the wing tip, and obtaining the actual value from the wing tip to the reference block and the reference of the part in the width direction according to the reference established by the reference block;
step S4: and determining the actual removal amount of the part according to the allowance of the laser scanning on the end surface in the length direction, and determining the reference of the part in the length direction.
10. The application of the clamping device for the 3D printing wing rudder type structural part based on any one of claims 1-7 in the technical field of 3D printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111580325.8A CN114227312B (en) | 2021-12-22 | 2021-12-22 | Clamping device and clamping method for 3D printing wing rudder structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111580325.8A CN114227312B (en) | 2021-12-22 | 2021-12-22 | Clamping device and clamping method for 3D printing wing rudder structural member |
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| Publication Number | Publication Date |
|---|---|
| CN114227312A true CN114227312A (en) | 2022-03-25 |
| CN114227312B CN114227312B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111580325.8A Active CN114227312B (en) | 2021-12-22 | 2021-12-22 | Clamping device and clamping method for 3D printing wing rudder structural member |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669786A (en) * | 2022-05-10 | 2022-06-28 | 西安黄河机电有限公司 | Winged waveguide processing and clamping device and winged waveguide gap processing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19547952A1 (en) * | 1995-12-21 | 1997-06-26 | Goetz Metall Anlagen | Clamping device for clamping workpieces with any circumferential contour |
| US20090064520A1 (en) * | 2007-01-31 | 2009-03-12 | General Electric Company | Inspection tool for measuring bucket Z notch position |
| CN110625411A (en) * | 2019-09-06 | 2019-12-31 | 北京星航机电装备有限公司 | Method for machining special-shaped low-rigidity superplastic control surface parts |
| CN210208395U (en) * | 2019-05-24 | 2020-03-31 | 四川省嘉绮瑞航空装备有限公司 | Aircraft part stretch bending processing frock |
-
2021
- 2021-12-22 CN CN202111580325.8A patent/CN114227312B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19547952A1 (en) * | 1995-12-21 | 1997-06-26 | Goetz Metall Anlagen | Clamping device for clamping workpieces with any circumferential contour |
| US20090064520A1 (en) * | 2007-01-31 | 2009-03-12 | General Electric Company | Inspection tool for measuring bucket Z notch position |
| CN210208395U (en) * | 2019-05-24 | 2020-03-31 | 四川省嘉绮瑞航空装备有限公司 | Aircraft part stretch bending processing frock |
| CN110625411A (en) * | 2019-09-06 | 2019-12-31 | 北京星航机电装备有限公司 | Method for machining special-shaped low-rigidity superplastic control surface parts |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669786A (en) * | 2022-05-10 | 2022-06-28 | 西安黄河机电有限公司 | Winged waveguide processing and clamping device and winged waveguide gap processing method |
| CN114669786B (en) * | 2022-05-10 | 2024-02-06 | 西安黄河机电有限公司 | Winged waveguide processing clamping device and winged waveguide gap processing method |
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| CN114227312B (en) | 2023-04-28 |
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