CN108380948B - Profile precision detection and milling composite device for large aluminum alloy bending member - Google Patents
Profile precision detection and milling composite device for large aluminum alloy bending member Download PDFInfo
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- CN108380948B CN108380948B CN201810409896.7A CN201810409896A CN108380948B CN 108380948 B CN108380948 B CN 108380948B CN 201810409896 A CN201810409896 A CN 201810409896A CN 108380948 B CN108380948 B CN 108380948B
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- 238000003801 milling Methods 0.000 title claims abstract description 66
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000005452 bending Methods 0.000 title claims abstract description 29
- 230000008093 supporting effect Effects 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 2
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- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 18
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 18
- 239000000047 product Substances 0.000 description 16
- 238000012545 processing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 238000003466 welding Methods 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000013003 hot bending Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
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- 229910052602 gypsum Inorganic materials 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
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
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Abstract
The invention provides a profile precision detection and milling composite device for a large aluminum alloy bending member, which comprises a plurality of clamping plates, wherein the clamping plates are vertically arranged on a plate surface and used for supporting the aluminum alloy member, a periphery narrow panel is arranged on the periphery of a top surface formed by the clamping plates, the top surface of the periphery narrow panel and the central part of the top surface of the clamping plates form a device top surface together, the device top surface is consistent with the theoretical profile of an aluminum alloy member product, the width of the periphery narrow panel is 30-200 mm, theoretical lines are downwards marked on the top surface of the periphery narrow panel and/or blind groove-shaped cutter-back grooves are downwards formed in the periphery narrow panel, and a bearing plate is fixedly arranged below the periphery narrow panel. The composite device designed by the invention has the component profile precision detection function and the allowance milling function, so that a set of allowance milling tool is prevented from being additionally designed, and the manufacturing cost and the time cost are greatly saved.
Description
Technical Field
The invention relates to the field of large thin-wall member forming precision detection and allowance milling, in particular to a device and a method for detecting the profile precision of a complex thin-wall member for aerospace and performing allowance milling.
Background
The preparation steps of the aluminum alloy bending member generally comprise the steps of forming, precision detecting, milling, welding and the like. Wherein the forming refers to forming a bending member by vacuum aging hot bending and the like of a flat aluminum alloy. The accuracy detection mainly detects whether the accuracy (e.g., curvature) of the molded surface of the molded member coincides with the theoretical product. Milling is the removal of an excess amount from the perimeter of the component to reduce the size of the component. Welding refers to the butt welding of the component with other components of the same or different shape, for example six or eight identical components, to form a large component.
Wherein, the ultra-large thin-wall aluminum alloy bending member (such as the length of 4-8m and the thickness of 10-20 mm) often has complex curvature appearance such as double curvature ellipsoidal storage tank seal heads due to design requirement, and the precision detection and milling of the aluminum alloy member are quite difficult.
After the middle and small thin-wall components (for example, the long axis direction dimension is about 1 m) are molded and manufactured, a template or a three-dimensional scanner is generally adopted to detect the molding precision, and the components are fixed on a special tool to perform allowance milling after the molding precision meets the requirement. The template detection means that a standard mould (template) for precision detection is firstly prepared from plastic, gypsum or a steel plate with the thickness of 2mm, and then an aluminum alloy component is covered on the top surface of the template to see whether the template is attached to the component, in particular whether the positions to be welded on the periphery of the component are completely attached to the template. The three-dimensional scanner precision detection mode is to scan the molded surface of the workpiece into a computer by adopting a laser scanner and then compare the molded surface with a standard molded surface in the computer, thereby judging whether the molded surface precision of the component is qualified. The invention patent CN201510283921.8 discloses a laser on-line measuring and processing detection method and device, integrates laser measurement, processing and detection, can realize on-line measurement of the geometric dimension shape of a plane or a curved surface of a workpiece to be processed before laser processing, obtain the dimension and the characteristics of a real plane or a space structure, eliminate the error between the workpiece to be processed and a theoretical digital-analog caused by deformation or aging deformation generated in the earlier processing flow, and improve the laser processing precision and quality. The device comprises a processing laser, an optical path system and a laser processing head which are sequentially positioned on the same optical path; the system also comprises a laser ranging system, a computer control system, a moving assembly and a workbench; the laser ranging system is used for acquiring measurement data before and after workpiece processing, including space coordinate values and normal angles of each point of the workpiece, and providing the measurement data to the computer control system. The device can measure and detect the dimensional accuracy and quality of the two-dimensional platform and the three-dimensional curved surface, and can improve the laser processing accuracy and quality.
The above method is effective only for small and medium thin-walled members. For ultra-large complex curvature components, the self weight is large, the dimension in the long axis direction is large, the integral rigidity is weak, the deformation influence of the self weight on the thin-wall components in different placement modes is not negligible, the forming precision of the components cannot be accurately detected by adopting a conventional sample plate for the medium-sized and small-sized thin-wall components and a three-dimensional scanner method, and a set of tool is additionally manufactured to perform the subsequent allowance milling of the large-sized aluminum alloy bending components, so that the cost is increased.
Regarding the allowance milling of the aluminum alloy bending member, two main modes are currently used, namely, a vacuum adsorption device is used, namely, the whole device comprises a plurality of vertically arranged vacuum adsorption columns, the height of each column is adjustable, after the height of each column is adjusted, namely, the shape of the top surface of the device is adjusted to be consistent with the molded surface of the member, the member is covered on the top surface of the device, and then the member is vacuum adsorbed on the device by vacuumizing. For example, patent CN201210491214.4 provides a vacuum adsorption system for clamping and fixing a thin plate by milling, which comprises a vacuum platform, a base, a rubber sealing strip, a pipeline, a digital display vacuum gauge and a vacuum pump; the vacuum platform is positioned on the base, the rubber sealing strip is placed in the sealing grooves on the base and the vacuum platform, the pipeline consists of a threaded air tap, a tetrafluoro pipe, a clamping sleeve, a three-way joint and a threaded connector, and the vacuum platform is connected with the base, the digital display vacuum gauge and the vacuum pump; a method for using a vacuum adsorption system for milling, clamping and fixing a thin plate comprises seven steps. According to the invention, by utilizing a vacuum technology, the thin plate part is uniformly adsorbed and fixed on the vacuum platform, so that the problem of clamping deformation of a workpiece is well solved, the milling precision of the part is improved, and the processing quality of the part is improved. The method has good practical value and wide application prospect in the technical field of mechanical processing. The device is convenient to use, but the price is high, for example, the price of the vacuum adsorption device corresponding to the large aluminum alloy bending member in the invention is as high as millions of RMB. Another way of milling the remainder of the aluminum alloy curved member is to stand the aluminum alloy curved member, secure it with a device comprising several longitudinal clamping mechanisms and transverse clamping mechanisms, and then use it for milling. The device is quite cumbersome to operate and milling machines up to three and four meters are rare.
Accordingly, there is a need in the art for a composite device and method that accurately detects the profile accuracy of a large aluminum alloy curved member that contains complex curvatures and that can facilitate the allowance milling thereof.
Disclosure of Invention
The invention provides a profile precision detection and milling composite device for a large aluminum alloy bending member, which comprises a plurality of clamping plates, wherein the clamping plates are vertically arranged on a plate surface and used for supporting the aluminum alloy member, a periphery narrow panel is arranged on the periphery of a top surface formed by the clamping plates, the top surface of the periphery narrow panel and the central part of the top surface of the clamping plates form a device top surface together, the device top surface is consistent with the theoretical profile of the aluminum alloy member product, the width of the periphery narrow panel is 30-200 mm, theoretical lines are downwards carved on the top surface of the periphery narrow panel and/or blind groove-shaped cutter grooves are downwards formed in the periphery of the periphery narrow panel before profile precision detection and milling are/is covered on part of the periphery of the member and extend out of the periphery narrow panel, a bearing plate is fixedly arranged below the periphery narrow panel, the width of the bearing plate is larger than the periphery narrow panel at least at part of the periphery, and the device further comprises bolts used for fixedly connecting the part of the member extending out of the periphery narrow panel to the periphery of the periphery narrow panel to the bearing plate after the member precision detection.
In the present invention, the "top surface formed by the plurality of cards" refers to the entire top surface formed by the plurality of cards welded together, and the "center portion of the top surface of the plurality of cards" refers to the center region surrounded by the peripheral portions of the top surface of the plurality of cards (i.e., surrounded by the peripheral narrow-width panels) except for the peripheral portions of the top surface covered by the peripheral narrow-width panels.
In a specific embodiment, the clamping plates are hollow plates with holes in through holes in the plate thickness direction to reduce dead weight, and the clamping plates comprise longitudinal clamping plates and transverse clamping plates which are perpendicular to each other.
In a specific embodiment, the distance between two adjacent parallel longitudinal clamping plates is more than 0.3m, and the distance between two adjacent parallel transverse clamping plates is more than 0.3 m.
In a specific embodiment, the distance between two adjacent parallel longitudinal clamping plates is 0.4-0.6 m, and the distance between two adjacent parallel transverse clamping plates is 0.4-0.6 m.
In a specific embodiment, the width of the peripheral narrow panel is 40 to 150mm, the thickness of the peripheral narrow panel is 10 to 30mm, and preferably the thickness of the peripheral narrow panel is 12 to 20mm.
In a specific embodiment, the aluminum alloy bending member is a melon-shaped member, two theoretical lines and two cutter-relief grooves are formed in the narrow panel around the device, the cutter-relief grooves are formed in the left side and the right side of the member length direction line, the theoretical lines are formed in the wide end and the narrow end corresponding to the member width direction, and the side lines, close to the center of the member, of the two cutter-relief grooves and the two theoretical lines jointly form the target size of the member product.
In a specific embodiment, the bearing plate is arranged at a position 10-100 mm, preferably 30-60 mm, below the four-side narrow panel, and the bearing plate is arranged in parallel or nearly in parallel with the four-side narrow panel, and is fixedly welded on the clamping plate.
In a specific embodiment, the total number of the bolts is 6 to 20, and the bolts are distributed around the member.
In a specific embodiment, the width of the cutter relieving groove is 12-20 mm, and the depth is 5-10 mm.
In a specific embodiment, the device further comprises a positioning component for positioning and placing the component on the device before precision detection, wherein the positioning component comprises a positioning hole and a positioning pin arranged on the bearing plate, and/or the positioning component comprises a positioning wire arranged on the device.
Compared with the prior art, the invention has at least the following beneficial effects:
1. Aiming at the profile accuracy detection of a large thin-wall member, the invention provides the detection method and the detection device for avoiding the influence of dead weight and weak rigidity on the profile accuracy, and the detection method and the detection device have the advantages of high efficiency, high detection accuracy and the like.
2. The composite device designed by the invention has the component profile precision detection function and the allowance milling function, so that a set of allowance milling tool is prevented from being additionally designed, and the manufacturing cost and the time cost are greatly saved.
3. The milling method of the melon-shaped member corresponding to the device in the method is simple in operation, accurate in product and high in one-time qualification rate.
Drawings
Fig. 1 is a schematic structural diagram of the profile precision detection and milling composite device for a large aluminum alloy bending member.
Fig. 2 is a schematic structure and a partial enlarged view of a panel with a narrow periphery in the composite device.
Fig. 3 is a schematic view of the structure of the composite device when milling the component.
In the figure, 1-clamping plate, 11-longitudinal clamping plate, 12-transverse clamping plate, 2-four-edge narrow panel, 21-theoretical line, 22-cutter relieving groove, 221-lateral line, 3-bearing plate, 4-bolt, 01-aluminum alloy component and 011-milling track line.
Detailed Description
The invention provides a large thin-wall member profile precision detection and allowance milling composite tool (composite device), as shown in figure 1, which is characterized by comprising the following basic characteristics that the tool has a thin-wall member profile precision detection function and a peripheral allowance milling function; the tool is formed by welding an integral frame by adopting clamping plates, the clamping plates comprise a transverse clamping plate and a longitudinal clamping plate, and before precision detection, the tool mainly comprises the clamping plates 1, four-side narrow-width panels 2, cutter yielding grooves 22, theoretical lines 21 and bearing plates 3 which are arranged on the four-side narrow-width panels 2, as shown in figure 1. The transverse clamping plate and the longitudinal clamping plate are 10mm thick steel plates, so that the weight reduction effect is achieved, and meanwhile, enough strength and rigidity are guaranteed, and holes are formed in the middle of the clamping plate. Welding 75mm x 18mm (width x thickness) narrow profiles around the top surface of the integral frame tooling, as shown in fig. 2, wherein 50mm is inside the theoretical profile (i.e. the width of the narrow profile around the inner side of the theoretical line 21 is 50 mm), 25mm is outside the theoretical profile (i.e. the width of the narrow profile around the outer side of the theoretical line 21 is 25 mm), the part inside the theoretical profile is mainly used for comparing the clearance between the undetected thin-wall member profile and the theoretical profile after hot bending, i.e. profile precision detection, and the part outside the theoretical profile is used for enhancing the stability when the narrow profile bears the thin-wall member; milling cutter relieving grooves with the width of 15mm multiplied by 6mm (width multiplied by depth) on narrow molded surfaces on the left side and the right side of the length line direction of the tool, wherein the inner side edges of the cutter relieving grooves are theoretical melon-clack lines along the line (side line 221), as shown in figure 2; a theoretical line is carved on the narrow profile of the wide end and the narrow end of the tool; after the precision detection is finished, the thin-wall component is fixed through a bearing plate 3 on the bolting tool. After all parts are fixed, the numerical control finish milling of the upper surface of the tool is performed to initially form the theoretical profile of the thin-wall component.
The invention provides a profile precision detection and milling composite device for a large aluminum alloy bending member, which comprises a plurality of clamping plates 1, wherein the clamping plates 1 are vertically arranged on a plate surface and are used for supporting the aluminum alloy member, a periphery of a top surface formed by the clamping plates is provided with a periphery narrow panel 2, the top surface of the periphery narrow panel 2 and the central part of the top surface of the clamping plates form a device top surface together, the device top surface is consistent with the theoretical profile of an aluminum alloy member product, the width of the periphery narrow panel is 30-200 mm, theoretical lines 21 are engraved downwards on the top surface of the periphery narrow panel and/or blind groove-shaped cutter grooves 22 are formed downwards, the periphery of the member covers at least part of the length and extends out of the periphery narrow panel before profile precision detection and milling, a bearing plate 3 is fixedly arranged below the periphery narrow panel, the width of the bearing plate is larger than the width of the periphery narrow panel at least at part of the periphery, and the periphery of the periphery narrow panel extends out of the periphery narrow panel is fixedly connected with a bolt 4 for the member to be milled after the member precision detection.
In this embodiment, the product theory profile is the inner bottom surface of an aluminum alloy curved member that is capped onto the device.
In a specific embodiment, the clamping plates are hollow plates with holes in a through hole shape in the plate thickness direction so as to reduce dead weight, and the clamping plates comprise a longitudinal clamping plate 11 and a transverse clamping plate 12 which are arranged vertically.
In a specific embodiment, the distance between two adjacent parallel longitudinal clamping plates is more than 0.3m, and the distance between two adjacent parallel transverse clamping plates is more than 0.3 m.
In a specific embodiment, the distance between two adjacent parallel longitudinal clamping plates is 0.4-0.6 m, and the distance between two adjacent parallel transverse clamping plates is 0.4-0.6 m.
In the invention, the clamping plate is too thin to meet the strength requirement of the device, the aluminum alloy members with hundreds of jacks cannot be supported, and the device is easy to deform when the whole device is hoisted. The cardboard is arranged too closely, and the welder is difficult to enter the cardboard for welding. In the specific embodiment of the invention, the distance between two adjacent longitudinal clamping plates and the distance between two adjacent transverse clamping plates are both 0.43m. In the present invention, the height of the card plate forms the overall height of the device, for example, between 1.1 and 1.5 m.
In a specific embodiment, the width of the peripheral narrow panel is 40 to 150mm, and the thickness of the peripheral narrow panel is 10 to 30mm.
In a specific embodiment, the thickness of the panel is 12 to 20mm.
In the present invention, when the width of the panel with narrow periphery is too wide, it is wasteful and the weight of the device is increased, and when the width is too narrow, it is difficult to provide a cutter-back groove with proper width thereon, and the supporting effect on the periphery of the member is poor when the precision is detected. When the thickness of the panel with the narrow periphery is too thick, the difficulty of forming the panel is increased, and when the thickness of the panel is too thin, the rigidity difference of the panel affects the detection of the profile precision of the component.
In a specific embodiment, the aluminum alloy bending member is a melon-shaped member, two theoretical lines and two cutter-relief grooves are formed in the narrow panel around the device, the cutter-relief grooves are formed in the left side and the right side of the member length direction line, the theoretical lines are formed in the wide end and the narrow end corresponding to the member width direction, and the side lines (221) of the two cutter-relief grooves, which are close to the center of the member, and the two theoretical lines jointly form the target size of the member product.
In the invention, the size periphery of the member obtained after milling is larger than the size of a target member product formed by the peripheral theoretical lines and the side lines. In the milling step, the components obtained by milling at the two cutter-relieving grooves are set to leave a margin of 5mm on one side than the final product, and the components are used for leaving an operation margin when butt welding is carried out on the melon-shaped components with the same shape. And at the two theoretical lines of the wide end and the narrow end, the component obtained by milling leaves a margin of 50mm more than the single side of the final product, and is used for leaving operation margin when being welded with other components with different shapes and structures. Therefore, in the milling step, the length direction of the member is not milled to the peripheral narrow panel due to the arrangement of the cutter relieving groove, and the wide end and the narrow end direction of the member are cut outside the peripheral narrow panel due to the large reserved allowance (the distance between the theoretical line and the outer edge of the peripheral narrow panel is only 25mm and is smaller than the allowance required to be reserved by 50 mm), so that the peripheral narrow panel is not milled. When the precision detection is carried out on the molded surface of the large aluminum alloy bending component, the feeler gauge is plugged onto the panel with the narrow periphery, and the feeler gauge is plugged onto the position of the theoretical line and the inner side wall line of the cutter relieving groove and the position inside the theoretical line, so that whether the molded surface precision of the component is qualified can be accurately detected.
In a specific embodiment, the bearing plate is arranged at a position 10-100 mm, preferably 30-60 mm, below the four-side narrow panel, and the bearing plate is arranged in parallel or nearly in parallel with the four-side narrow panel, and is fixedly welded on the clamping plate.
In a specific embodiment, the total number of the bolts is 6 to 20, and the bolts are distributed around the member. For example, five bolts are uniformly arranged beside each of the two cutter-relieving grooves, and two bolts are additionally arranged at the wide end of the component.
In a specific embodiment, the width of the cutter relieving groove is 12-20 mm, and the depth is 5-10 mm.
In a specific embodiment, the device further comprises a positioning component for positioning and placing the component on the device before precision detection, wherein the positioning component comprises a positioning hole and a positioning pin arranged on the bearing plate, and/or the positioning component comprises a positioning wire arranged on the device.
Specifically, the positioning holes arranged on the bearing plate are, for example, 15-20 mm in diameter, and the edges of the aluminum alloy component are correspondingly provided with the positioning through holes with 15-20 mm in diameter before the aluminum alloy component is flat plate and is not heated, and the component is heated and then is correspondingly inserted into the positioning holes on the bearing plate and the positioning through holes on the component by using the positioning pins, so that the component can be accurately positioned and placed on the composite device. When the positioning member also includes a positioning line, the width and depth of the positioning line are, for example, each 0.1 to 0.2mm. Preferably, the positioning component comprises a hole pin for positioning, so that the positioning component is clearer and more visual and is convenient to operate. The invention comprises theoretical lines marked on the panel with narrow periphery, positioning lines marked on the device and product theoretical lines marked on the upper surface of the component before subsequent milling, wherein the width and depth of the theoretical lines are generally 0.1-0.2 mm.
The operation method of the composite device comprises a profile precision detection step and a allowance milling step which are sequentially carried out, and specifically comprises the following steps:
Step A, positioning and placing: positioning and placing the aluminum alloy component after hot bending on the composite device; in step a, the aluminum alloy member is positioned and placed on the composite device, specifically by a positioning component. The positioning component comprises a positioning hole and a positioning pin which are arranged on the bearing plate, and/or the positioning component comprises a positioning line arranged on the device. For example, when the positioning line is used for positioning the component, the method specifically comprises milling fine positioning lines at the central symmetry position of the surface before hot bending of the thin-wall component blank, and placing the formed component on the surface of the tool to enable the positioning lines on the component to coincide with the positioning lines on the surface of the tool.
Step B, detecting profile precision: measuring the gap between the component molded surface and the theoretical molded surface at the periphery of the narrow panel by using a feeler gauge after the component is positioned, and checking whether the requirement is met; in the step B, a clearance at a position within a component product dimension line formed by a theoretical line and the side line together is measured by using a feeler gauge.
Step C, fixing a component: after the profile precision of the detected component meets the requirement, the component is fixed by using a bolt to connect the component with a bearing plate on the tool; in step C, a schematic diagram of the use of the bolt connection member and the bearing plate on the tool is shown in FIG. 3.
Step D, carrying out allowance milling on the component: after the components are fixed, the numerical control machine programming enables the milling cutter to carry out allowance milling on the components according to a preset track.
The invention also provides a milling method of the large aluminum alloy melon-shaped member, which comprises the steps of using a milling device, wherein the milling device comprises a plurality of clamping plates 1 which are vertically arranged on the plate surface and are used for supporting the aluminum alloy member, a periphery of the top surface formed by the clamping plates is provided with a periphery narrow-width type panel 2, the top surface of the periphery narrow-width type panel 2 and the central part of the top surface of the clamping plates jointly form a device top surface, the device top surface is consistent with the theoretical molded surface of an aluminum alloy member product, the width of the periphery narrow-width type panel is 30-200 mm, the periphery of the member is covered and extends out of the periphery narrow-width type panel at least on part of the length before milling, a bearing plate 3 is fixedly arranged below the periphery narrow-width type panel, the width of the bearing plate is larger than the width of the periphery narrow-width type panel at least on part of the periphery, and the device further comprises bolts 4 which are used for fixedly connecting the part of the member extending out of the periphery narrow-width type panel with the bearing plate to the bearing plate before milling the member; the method comprises the following steps:
Step one, fixing a melon petal-shaped member: the melon-shaped components which are positioned and placed on the device and have qualified precision detection are clamped in an auxiliary mode by adopting a C-shaped clamp and are fixed by adopting bolts, the wide end of the components is fixed firstly, then the left side and the right side of the length direction line of the components, which are close to the wide end, are fixed, and then the left side and the right side of the length direction line, which are close to the narrow end, of the components are fixed, so that the melon-shaped components are fixed on a bearing plate of the device;
Step two, carrying out allowance milling on the melon-shaped member: after the components are fixed, a product theoretical line is engraved on the upper surface of the melon-shaped component by using a milling cutter, then the milling cutter performs allowance milling on the components on the melon-shaped component by taking the product theoretical line as a reference according to milling track lines, the milling track lines bypass each bolt to form bolt fixing lugs, and finally milling is performed on the bolt fixing lugs.
In the invention, the plane projection shape of the melon petal-shaped member is approximately an isosceles trapezoid, the wide end of the melon petal-shaped member is equal to the lower bottom edge of the isosceles trapezoid, the narrow end of the melon petal-shaped member is equal to the upper bottom edge of the isosceles trapezoid, and the left side and the right side of the length direction line of the melon petal-shaped member are equal to two waists of the isosceles trapezoid. The four sides of the "isosceles trapezoid" of the planar projection of the melon-shaped member are not generally straight, but have a curvature. The melon-shaped member itself has a complex curvature, for example a curvature in both directions perpendicular to the direction.
Specifically, the C-shaped clamp handle for applying force is arranged on the upper part, and the C-shaped clamp clamps the melon-shaped member and the bearing plate downwards. In the invention, the precision and the fixing efficiency of the bolt fixing are higher than those of the C-shaped clamp, so the C-shaped clamp is adopted for assisting, and the bolt is used for fastening.
In order to provide accurate detection positions of the feelers during precision detection, theoretical lines are generally arranged on the panel with narrow periphery, product theoretical lines and milling track lines are generally drawn on the upper surface of the melon petal member, and the function of the product theoretical lines is to provide reference for whether small amount of cutting is needed during subsequent welding.
In a specific implementation mode, in the first step, two sides of a melon petal component are clamped through 2-4 pairs of C-shaped clamps, the wide end of the melon petal component is punched through a numerical control milling cutter and fixed through bolts, the wide end of the component is fixed with a bearing plate through bolts, then the C-shaped clamps are removed, two side parts close to the wide end of the melon petal component are clamped through the C-shaped clamps, the inner bottom surface of the melon petal component is tightly attached to the upper surface of a panel with narrow periphery, and the two side parts close to the wide end of the melon petal component are punched through the numerical control milling cutter and fixed through bolts; and finally, removing the C-shaped clamp at the position, clamping the two side parts close to the narrow end of the melon petal member by using the C-shaped clamp, punching the two side parts close to the narrow end of the melon petal member by using a numerical control milling cutter, fixing by using bolts, and removing the C-shaped clamp after all bolts are fixed. In the invention, the periphery of the inner bottom surface of the melon petal member is completely tightly attached to the upper surface of the panel with narrow periphery in the process of fixing the melon petal member, so that the subsequent processing precision and the accuracy of a product theoretical line drawn on the melon petal member are ensured. In the invention, before the components are fixed, only the parts of the components, which are qualified in precision detection, are slightly not attached to each other at the positions, which are close to the wide ends, of the two sides, and the wide ends, the narrow ends and the parts, which are close to the narrow ends, of the two sides are better attached to each other. In the invention, when the C-shaped clamp is used to clamp two sides of the component, the C-shaped clamp and the bolt are staggered by a distance along the length line direction of the component so as to open holes on the component and fix the component by installing the bolt.
In a specific embodiment, in the second step, when milling is performed on the bolt fixing lug, the thickness of 1-3 mm is reserved and is not cut off, so that the melon petal member is prevented from rebounding to damage the cutter; finally, the uncut bolt fixing lugs of the machine are manually cut off.
In the invention, the thickness of the melon petal component is 18mm, and a bolt fixing lug is formed at a position which is generally around each bolt in the early stage of milling, so that the component is well fixed on the bearing plate in the whole milling process.
In a specific embodiment, theoretical lines 21 are drawn downwards and/or blind groove-shaped cutter relief grooves 22 are formed downwards on the top surface of the panel with the narrow periphery.
The foregoing is a further detailed description of the invention in connection with specific preferred embodiments, and is not intended to limit the practice of the invention to such description. It will be apparent to those skilled in the art that several simple deductions and substitutions can be made without departing from the spirit of the invention, and these are considered to be within the scope of the invention.
Claims (12)
1. The utility model provides a large-scale aluminum alloy bending member's profile precision detects and milling composite device, sets up in the face erects and is used for supporting aluminum alloy bending member's polylith cardboard (1), is provided with narrow panel all around (2) in the periphery of the top surface that polylith cardboard formed jointly, and the top surface of narrow panel all around (2) forms composite device top surface with the central part of polylith cardboard top surface jointly, and composite device top surface is unanimous with aluminum alloy bending member's theoretical profile, narrow panel all around's width is 30 ~ 200mm narrow panel all around's top surface down is carved with theoretical line (21) and/or is offered blind groove form let knife groove (22) downwards on narrow panel all around top surface all around, aluminum alloy bending member is at least in partial length upper cover and stretches out narrow panel all around before profile precision detection and milling, still fixedly provided with bearing plate (3) below narrow panel all around, and the width of bearing plate is greater than narrow panel all around at partial peripheral position bearing plate's width, composite device still includes bolt (4), after aluminum alloy bending member profile precision detects, will bend panel through bending member (4) and stretch out the outside the aluminum alloy bending member and wait to cut the fixed part of width of narrow panel all around.
2. The composite device according to claim 1, wherein the clamping plates are hollow plates with holes in the shape of through holes in the plate thickness direction to reduce the dead weight, and the plurality of clamping plates comprise longitudinal clamping plates (11) and transverse clamping plates (12) which are arranged vertically to each other.
3. The composite device of claim 2, wherein a spacing between two parallel adjacent longitudinal cards is 0.3m or more and a spacing between two parallel adjacent transverse cards is 0.3m or more.
4. A composite device according to claim 3, wherein the spacing between two parallel adjacent longitudinal cards is between 0.4 and 0.6m and the spacing between two parallel adjacent transverse cards is between 0.4 and 0.6m.
5. The composite device of claim 1, wherein the width of the peripheral narrow panel is 40 to 150mm and the thickness of the peripheral narrow panel is 10 to 30mm.
6. The composite device of claim 5, wherein the thickness of the peripheral narrow panel is 12-20 mm.
7. The composite device according to claim 1, wherein the aluminum alloy bending member is a melon-shaped member, two theoretical lines and two cutter-relief grooves are provided on a panel of a narrow shape around the composite device, the cutter-relief grooves are provided on both left and right sides of a line in a length direction of the aluminum alloy bending member, the theoretical lines are provided at a wide end and a narrow end corresponding to a width direction of the aluminum alloy bending member, and side lines (221) of the two cutter-relief grooves near a center position of the aluminum alloy bending member and the two theoretical lines together constitute a target size of the aluminum alloy bending member product.
8. The composite device according to claim 1, wherein the bearing plate is arranged at a position 10-100 mm below the panel with a narrow periphery, and the bearing plate is arranged in parallel or nearly in parallel with the panel with a narrow periphery, and the bearing plate is fixedly welded on the clamping plate.
9. The composite device according to claim 8, wherein the bearing plate is disposed at a position 30-60 mm below the peripheral narrow panel.
10. The composite device according to claim 1, wherein the total number of the bolts is 6 to 20 and is disposed around the aluminum alloy bending member in a dispersed manner.
11. The composite device of claim 1, wherein the relief groove has a width of 12-20 mm and a depth of 5-10 mm.
12. The composite device of claim 1, further comprising a positioning component for positioning the aluminum alloy bending member on the composite device prior to the profile accuracy detection, and wherein the positioning component comprises a positioning hole and a positioning pin provided on the bearing plate, and/or wherein the positioning component comprises a positioning wire provided on the composite device.
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| CN201195254Y (en) * | 2008-04-16 | 2009-02-18 | 成都飞机工业（集团）有限责任公司 | Adsorption clamp type thin wall member edge-cutting combined fixture |
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