CN108580986B - A method for profile accuracy detection and milling of large aluminum alloy bending components - Google Patents

Abstract

The present invention provides the type face accuracy detection and milling method of a kind of large aluminum alloy bent member, and the method includes using a kind of type face accuracy detection and milling set composite；Described method includes following steps, and step A, the aluminium alloy element positioning after hot bending is placed on the set composite；Step B, it type face accuracy detection: using the gap at the clearance gauge measurement narrow type panel of surrounding between member type face and theoretical profile, that is, surrounding narrow type panel top surface after component positioning, checks whether to meet the requirements；Step C, component is fixed: using bolt connecting elements and the bearing plate, component being fixed；Step D, carry out surplus milling to component: Numerical Control Programming makes milling cutter carry out surplus milling to component according to desired guiding trajectory.Set composite in the method for the present invention has the function of member type face accuracy detection and surplus milling function simultaneously, avoids and in addition redesigns a set of surplus milling tooling, manufacturing cost and time cost is greatly saved.

Description

A method for profile accuracy detection and milling of large aluminum alloy bending components

technical field

The patent of the present invention relates to the field of forming precision detection and allowance milling of large thin-walled components, in particular to a device and method for profile precision detection and allowance milling of complex thin-walled components used in aerospace.

Background technique

The preparation steps of aluminum alloy bending components usually include the steps of forming, precision testing, milling and welding. Forming refers to forming a bending member of a flat aluminum alloy by vacuum aging hot bending or the like. Accuracy detection is mainly to detect whether the accuracy (such as curvature) of the formed component surface is consistent with the theoretical product. Milling is the reduction of the size of a component by removing excess amount from the periphery of the component. Welding means that the component is butt-welded with other components of the same or different shapes, for example, six or eight identical components are butt-welded together to form a large component.

Among them, ultra-large thin-walled aluminum alloy bending members (such as 4-8m in length and 10-20mm in thickness) often have complex curvature shapes due to design requirements, such as double-curvature ellipsoid tank heads, and the accuracy of such aluminum alloy members Inspection and milling are quite difficult.

Small and medium-sized thin-walled components (for example, the size of the long axis is about 1m) are usually used to test the profile accuracy after forming and manufacturing. After the forming accuracy meets the requirements, they are fixed on a special tool for margin milling. Among them, sample testing refers to first preparing a standard mold (model) for precision testing with plastic, gypsum or a steel plate with a thickness of 2 mm, and then covering the aluminum alloy component on the top surface of the sample to see whether the sample and the component fit together. , especially whether the parts to be welded around the component are fully fitted with the template. The three-dimensional scanner accuracy detection method is to use a laser scanner to scan the profile of the workpiece into the computer, and then compare it with the standard profile in the computer, thereby judging whether the profile accuracy of the component is qualified. For example, the invention patent CN201510283921.8 discloses a method and device for laser on-line measurement, processing and detection, which integrates laser measurement, processing and detection, and can measure the plane or curved surface geometry of the workpiece to be processed online before laser processing, and obtain The real plane or spatial structure size and characteristics eliminate the error between the workpiece to be processed and the theoretical digital model caused by the deformation or aging deformation in the pre-processing process, and improve the laser processing accuracy and quality. The device includes a processing laser, an optical path system and a laser processing head sequentially located on the same optical path; it also includes a laser ranging system, a computer control system, a moving component and a workbench; the laser ranging system is used to obtain the measurement data before and after the workpiece is processed , including the space coordinate value and normal angle of each point of the workpiece, and provide it to the computer control system. The device can measure and detect the dimensional accuracy and quality of a two-dimensional platform and a three-dimensional curved surface, and can improve the laser processing accuracy and quality.

The above method is only valid for small and medium-sized thin-walled components. For super-large complex curvature components, due to their large self-weight and large size in the long axis direction, the overall stiffness is weak, and the effect of self-weight on the deformation of thin-walled components under different placement methods cannot be ignored. Both the template and the three-dimensional scanner method for wall members cannot accurately detect the forming accuracy of the member, and an additional set of tooling is required for the subsequent machining of large aluminum alloy bending members, resulting in increased costs.

When it comes to the allowance milling of aluminum alloy bending components, there are two main methods currently used. One is to use a vacuum adsorption device, that is, the whole device includes many vertical vacuum adsorption columns, and the height of each column is adjustable. After the height of each column is adjusted, that is, the shape of the top surface of the device is adjusted to be consistent with the profile of the component, the component is covered on the top surface of the device, and then vacuum is applied to vacuum the component to the device. For example, patent CN201210491214.4 provides a vacuum adsorption system for thin plate milling, clamping and fixing, which includes a vacuum platform, a base, a rubber sealing strip, a pipeline, a digital vacuum gauge, and a vacuum pump; the vacuum platform is located on the top of the base, and the rubber The sealing strip is placed in the sealing groove on the base and the vacuum platform. The pipeline is composed of threaded gas nozzle, PTFE tube, ferrule, tee joint and threaded joint, which connects the base, digital vacuum gauge and vacuum pump; one A method of using a vacuum adsorption system for thin plate milling, clamping and fixing, the method has seven major steps. The invention utilizes the vacuum technology to uniformly adsorb and fix the thin plate parts on the vacuum platform, so as to better solve the problem of clamping and deformation of the workpiece, improve the milling accuracy of the parts, and improve the processing quality of the parts. It has good practical value and broad application prospect in the field of machining technology. The device is convenient to use, but its price is high. For example, the price of the vacuum adsorption device corresponding to the large aluminum alloy bending member described in the present invention is as high as millions of RMB. Another way to cut the allowance of the aluminum alloy bending member is to let the aluminum alloy bending member stand, fix it with a device including several longitudinal clamping mechanisms and transverse clamping mechanisms, and then use it for milling. The device is quite cumbersome to operate, and milling machines with a height of three or four meters are rare.

Therefore, there is a need in the art for a composite device and method that can accurately detect the profile accuracy of large aluminum alloy bending components with complex curvatures and can perform convenient margin milling.

SUMMARY OF THE INVENTION

The invention provides a profile accuracy detection and milling method for a large-scale aluminum alloy bending member. The method includes using a profile precision detection and milling composite device, the composite device includes a plate surface erected for supporting aluminum A plurality of card plates (1) of an alloy component are provided with a peripheral narrow-width panel (2) on the periphery of a top surface jointly formed by the plurality of card plates, and the top surface of the surrounding narrow-width panel (2) is connected with the plurality of card plates. The central part of the top surface together forms the top surface of the device. The top surface of the device is consistent with the theoretical profile of the aluminum alloy component product. The width of the surrounding narrow panel is 30-200mm. A theoretical line (21) is engraved downward and/or a blind slot-shaped let-down groove (22) is formed downward, and the periphery of the component is covered and protruded at least part of its length before the profile accuracy inspection and milling. The surrounding narrow-width panel, a pressure-bearing plate (3) is also fixedly arranged under the surrounding narrow-width panel, and the width of the pressure-bearing plate is greater than the width of the surrounding narrow-width panel at least in part of the surrounding position, and the device further comprises a After the component accuracy is detected, the part of the component extending beyond the outer periphery of the narrow panel is fixedly connected to the bearing plate for the bolts (4) of the component to be milled; the method includes the following steps:

Step A, positioning and placing: positioning and placing the aluminum alloy component after hot bending on the composite device;

Step B. Profile accuracy detection: After the component is positioned, use a feeler gauge to measure the gap between the component profile and the theoretical profile at the surrounding narrow-width panels, that is, the top surface of the surrounding narrow-width panels, to check whether the requirements are met;

Step C, component fixation: after the profile accuracy of the detected component meets the requirements, use bolts to connect the component and the bearing plate to fix the component;

Step D. Perform allowance milling on the component: After the component is fixed, the CNC machine tool programming enables the milling cutter to perform allowance milling on the component according to the preset trajectory.

In the present invention, the "top surface jointly formed by a plurality of card boards" refers to the overall top surface formed by a plurality of card boards after welding into a whole, and the "central part of the top surface of the plurality of card boards" refers to the top surface except for the The place other than the peripheral part of the top surface covered by the surrounding narrow-width panels refers to the central area enclosed by the peripheral parts of the top surface of a plurality of card boards (that is, surrounded by the surrounding narrow-width panels).

In a specific implementation manner, a theoretical line (21) and a let-down notch (22) are provided on the top surface of the surrounding narrow-width panel, and the side surface of each let-down sipe close to the center of the component intersects with the top surface The line is its side line. In step B, use a feeler gauge to measure the gap at the position within the product dimension line of the component formed by the theoretical line and the side line.

In a specific embodiment, the card boards are all hollow boards with through-hole-shaped holes in the thickness direction of the board to reduce self-weight, and the plurality of card boards include longitudinal card boards arranged perpendicular to each other and Horizontal card board.

In a specific embodiment, the distance between two parallel adjacent longitudinal clamping plates is more than 0.3m, and the distance between two parallel adjacent horizontal clamping plates is 0.3m or more.

In a specific embodiment, the distance between two parallel adjacent longitudinal clamping plates is 0.4-0.6 m, and the distance between two parallel adjacent transverse clamping plates is 0.4-0.6 m.

In a specific embodiment, the width of the surrounding narrow-width panels is 40-150 mm, the thickness of the surrounding narrow-width panels is 10-30 mm, and preferably the thickness of the surrounding narrow-width panels is 12-12 mm. 20mm.

In a specific embodiment, the aluminum alloy bending member is a melon-shaped member, and two theoretical lines and two let-down grooves are arranged on the narrow-width panel around the device, and the let-down grooves are It is arranged on the left and right sides of the length direction line of the component, and the theoretical line is arranged at the wide end and the narrow end corresponding to the width direction of the component, and the side lines of the two kerfs near the center of the component are common with the two theoretical lines. The target size of the component product.

In a specific embodiment, the pressure-bearing plate is arranged at 10-100 mm, preferably 30-60 mm below the surrounding narrow-width panels, and the pressure-bearing plate is arranged in parallel or nearly parallel to the surrounding narrow-width panels, The pressure-bearing plate is fixedly welded on the card board.

In a specific embodiment, the total number of the bolts is 6 to 20, and the bolts are distributed around the component.

In a specific implementation manner, the width of the sipe is 12-20 mm, and the depth is 5-10 mm.

In a specific embodiment, the device further includes a positioning part for positioning the component on the device before the accuracy detection, and the positioning part includes a positioning hole and a positioning pin provided on the bearing plate , and/or the positioning member includes a positioning wire provided on the device.

Compared with the prior art, the present invention has at least the following beneficial effects:

1. The present invention proposes a detection method and device for avoiding the influence of self-weight and weak stiffness on the profile precision of large thin-walled components, which has the advantages of high efficiency and high detection precision.

2. The composite device designed by the present invention has both the component profile accuracy detection function and the margin milling function, which avoids designing another set of margin milling tooling and greatly saves the manufacturing cost and time cost.

3. The milling method of the melon-shaped member corresponding to the device in the method of the present invention is simple in operation, accurate in product and high in one-time pass rate.

Description of drawings

FIG. 1 is a schematic structural diagram of the profile precision detection and milling composite device of the large aluminum alloy bending member according to the present invention during profile precision detection.

FIG. 2 is a schematic view of the structure of the surrounding narrow-width panels in the composite device and a partial enlarged view thereof.

FIG. 3 is a schematic structural diagram of the composite device when milling components.

In the figure, 1-cardboard, 11-vertical cardboard, 12-horizontal cardboard, 2-surrounding narrow-width panel, 21-theoretical line, 22- let knife groove, 221-side edge line, 3-bearing plate , 4-bolts, 01-aluminum alloy components, 011-milling track lines.

Detailed ways

The present invention first provides a large-scale thin-walled component profile accuracy detection and allowance milling composite tooling (composite device), as shown in FIG. 1 , its basic features include that the tooling has both the thin-walled component profile accuracy detection function and the surrounding allowance milling. Function; the tooling is welded by the whole frame of the card board, and the card plate includes a horizontal card plate and a vertical card plate. The let knife groove 22 on the web-type panel 2 is composed of a theoretical line 21 and a pressure-bearing plate 3, as shown in Figure 1. The horizontal and vertical pallets are 10mm thick steel plates. In order to achieve the effect of weight reduction and ensure sufficient strength and rigidity, holes are opened in the middle of the pallets. Weld a 75mm×18mm (width×thickness) narrow profile around the top surface of the integral frame tooling, as shown in Figure 2, where the theoretical profile is 50mm (that is, the width of the surrounding narrow profile on the inner side of the theoretical line 21 is 50mm), The theoretical profile is 25mm outside (that is, the width of the narrow panel around the outside of the theoretical line 21 is 25mm). The part inside the theoretical profile is mainly used to compare the gap between the undetected thin-walled component profile and the theoretical profile after hot bending. That is, the profile accuracy detection, the part outside the theoretical profile is to strengthen the stability of the narrow profile when it is subjected to thin-walled components; the narrow profile on the left and right sides of the tooling length line is milled 15mm × 6mm (width × depth). ), let the edge line (sideline 221) of the inner side of the knife groove be the theoretical melon line, as shown in Figure 2; the theoretical line is engraved on the narrow profile surface of the wide end and the narrow end of the tooling; thin-walled components are accurate After the inspection is completed, the bearing plate 3 on the tooling is connected by bolts for fixing. After all parts are fixed, CNC fine milling on the upper surface of the tooling initially forms the theoretical profile of thin-walled components.

Specifically, the present invention provides a profile accuracy detection and milling composite device for large-scale aluminum alloy bending components, including a plurality of card plates 1 vertically arranged on the plate surface for supporting the aluminum alloy component, and a joint formed by the plurality of card plates is formed. The periphery of the top surface is provided with surrounding narrow-width panels 2, and the top surface of the surrounding narrow-width panels 2 and the central part of the top surfaces of the plurality of pallets together form the top surface of the device. The top surface of the device and the theoretical profile of the aluminum alloy component product Consistently, the width of the surrounding narrow panel is 30-200mm, and a theoretical line 21 is engraved downward on the top surface of the surrounding narrow panel and/or a blind slot-shaped letting slot 22 is opened downward, Before the profile accuracy detection and milling, the periphery of the member covers at least part of its length and extends out of the surrounding narrow-width panels, and a pressure-bearing plate 3 is also fixedly arranged under the surrounding narrow-width panels, at least in part of the surrounding position. The width of the pressure-bearing plate is greater than the width of the surrounding narrow-width type panels, and the device further includes a part used to extend the part of the member beyond the outer circumference of the surrounding narrow-width type panels to the pressure-bearing plate after the component accuracy detection is fixedly connected to the member to be milled. 4 of the bolts.

In this embodiment, the theoretical profile of the product is the inner bottom surface of the aluminum alloy bending member covering the device.

In a specific embodiment, the card boards are hollow boards with through-hole-shaped holes in the plate thickness direction to reduce the self-weight, and the plurality of card boards include longitudinal card boards 11 arranged perpendicular to each other. and horizontal card board 12.

In a specific embodiment, the distance between two parallel adjacent longitudinal clamping plates is more than 0.3m, and the distance between two parallel adjacent horizontal clamping plates is 0.3m or more.

In a specific embodiment, the distance between two parallel adjacent longitudinal clamping plates is 0.4-0.6 m, and the distance between two parallel adjacent transverse clamping plates is 0.4-0.6 m.

In the present invention, if the clamping plate is set too thin, it is difficult to meet the strength requirements of the device, cannot support the whole aluminum alloy component with hundreds of kilograms, and the device is easily deformed when the whole device is hoisted. If the pallets are set too densely, it is difficult for welders to enter them for welding. In a specific embodiment of the present invention, the distance between two adjacent longitudinal clamping plates and the distance between two adjacent transverse clamping plates of the present invention are both 0.43m. In the present invention, the height of the pallet forms the overall height of the device, for example, between 1.1 and 1.5 m.

In a specific embodiment, the width of the surrounding narrow-width panel is 40-150 mm, and the thickness of the surrounding narrow-width panel is 10-30 mm.

In a specific embodiment, the thickness of the surrounding narrow-width panel is 12-20 mm.

In the present invention, when the width of the surrounding narrow panel is too wide, it is cumbersome and useless and increases the weight of the device, and when the width is too narrow, it is difficult to set a knife groove with a suitable width on it, and it is difficult to set a knife groove on it when the accuracy is detected. Poor support around the member. When the thickness of the surrounding narrow panel is too thick, it becomes more difficult to form the panel itself, and when the thickness is too thin, the difference in rigidity affects the detection of the profile accuracy of the component.

In a specific embodiment, the aluminum alloy bending member is a melon-shaped member, and two theoretical lines and two let-down grooves are arranged on the narrow-width panel around the device, and the let-down grooves are It is arranged on the left and right sides of the length direction line of the component, and the theoretical line is arranged at the wide end and the narrow end corresponding to the width direction of the component, and the two side lines (221) of the kerf close to the center of the component and the two The theoretical lines together constitute the target size of the component product.

In the present invention, the circumference of the component size obtained after milling is larger than the size of the target component product formed by the surrounding theoretical line and the side line. In the milling step of the present invention, two parts are set so that the member obtained by milling at the kerf has a margin of 5mm on one side of the final product, which is used for subsequent butt welding with the melon-shaped member of the same shape. Operating margin. At the two theoretical lines of the wide end and the narrow end, the components obtained by milling have a margin of 50mm on the single side of the final product, which is used for subsequent welding with other components of different shapes and structures. Therefore, in the milling step, the length direction of the component will not be milled to the surrounding narrow panel due to the setting of the kerf, and the wide and narrow end directions of the component have a large margin (theoretical line and The distance between the outer edges of the surrounding narrow-width panels is only 25mm, which is less than the required allowance of 50mm), so that the slit is on the outside of the surrounding narrow-width panels, so it will not be milled to the surrounding narrow-width panels. When testing the accuracy of the profile of large aluminum alloy bending components, plug the feeler gauge on the surrounding narrow panel, and generally plug the feeler gauge to the theoretical line and the inner side wall of the knife groove and within the line. position, it can accurately measure whether the profile accuracy of the component is qualified.

In a specific embodiment, the pressure-bearing plate is arranged at 10-100 mm, preferably 30-60 mm below the surrounding narrow-width panels, and the pressure-bearing plate is arranged in parallel or nearly parallel to the surrounding narrow-width panels, The pressure-bearing plate is fixedly welded on the card board.

In a specific embodiment, the total number of the bolts is 6 to 20, and the bolts are distributed around the component. For example, two evenly place five bolts next to the kerf, and add two more bolts at the wide end of the member.

In a specific implementation manner, the width of the sipe is 12-20 mm, and the depth is 5-10 mm.

In a specific embodiment, the device further includes a positioning part for positioning the component on the device before the accuracy detection, and the positioning part includes a positioning hole and a positioning pin provided on the bearing plate , and/or the positioning member includes a positioning wire provided on the device.

Specifically, the positioning holes provided on the pressure-bearing plate are, for example, 15-20 mm in diameter. Before the aluminum alloy component is a flat plate, a positioning through hole with a diameter of 15-20 mm is correspondingly set on its edge, and the component is used after hot bending. The positioning pins are correspondingly inserted into the positioning holes on the pressure bearing plate and the positioning through holes on the component, 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, 0.1-0.2 mm. Preferably, the positioning component includes hole and pin positioning, which is more clear and intuitive and facilitates operation. In the present invention, it includes the theoretical line depicted on the surrounding narrow panel, the positioning line depicted on the device, and the product theoretical line depicted on the upper surface of the component before subsequent milling, and its width and depth are generally 0.1~ 0.2mm.

The operation method of the composite device of the present invention includes the step of profile accuracy detection and the step of margin milling, and specifically includes:

Step A, positioning and placing: positioning and placing the hot-bent aluminum alloy component on the composite device; in step A, the aluminum alloy component is specifically positioned and placed on the composite device through a positioning component. The positioning member includes positioning holes and positioning pins arranged on the pressure bearing plate, and/or the positioning member includes positioning lines arranged on the device. For example, when using the positioning line to locate the component, it specifically includes milling a small positioning line at the center of the surface before the hot bending process of the thin-walled component blank. The positioning lines coincide.

Step B. Profile accuracy detection: After the component is positioned, use a feeler gauge to measure the gap between the component profile and the theoretical profile at the surrounding narrow panel to check whether the requirements are met; in step B, use a feeler gauge to measure the theoretical line and all The gap at the position within the product dimension line of the component formed by the side lines.

Step C, component fixation: after the component profile accuracy meets the requirements, use bolts to connect the component and the pressure plate on the tool to fix the component; in step C, use bolts to connect the component and the pressure plate on the tool. See Figure 3.

Step D. Perform allowance milling on the component: After the component is fixed, the CNC machine tool programming enables the milling cutter to perform allowance milling on the component according to the preset trajectory.

The present invention also provides a method for milling a large-scale aluminum alloy melon-shaped component, including using a milling device, wherein the milling device includes a plurality of card plates 1 erected on the board surface for supporting the aluminum alloy component. The periphery of the top surface formed by multiple card boards is provided with surrounding narrow-width panels 2, and the top surface of the surrounding narrow-width panels 2 and the central part of the top surfaces of the multiple card boards together form the top surface of the device, and the top surface of the device and the aluminum The theoretical profile of the alloy component product is the same. The width of the surrounding narrow panel is 30-200mm. Before the component is milled, the periphery of the component is covered at least part of the length and extends out of the surrounding narrow panel. A pressure-bearing plate 3 is also fixedly arranged below the profiled panel, and at least in some peripheral positions, the width of the pressure-bearing plate is greater than the width of the surrounding narrow-width profiled panels. The part other than the outer periphery of the mold plate is fixedly connected with the bearing plate to be the bolt 4 of the component to be milled; the method includes the following steps:

Step 1. Fixing the melon-shaped member: The melon-shaped member that has been positioned and placed on the device and has passed the accuracy test is clamped by means of a C-clamp and fixed with bolts, and specifically, the wide end of the member is fixed first, and then the member is fixed. The left and right sides of the length direction line near the wide end, and then the left and right sides of the length direction line near the narrow end of the fixing member, and the melon-shaped member is fixed on the pressure-bearing plate of the device;

Step 2. Carry out margin milling on the melon-shaped component: after fixing the component, first use the milling cutter to engrave the product theoretical line on the upper surface of the melon-shaped component, and then the milling cutter takes the product theoretical line as a reference, and mills the melon according to the method. The tangent track line is used to carry out allowance milling on the component, and the milling track line bypasses each bolt to form a bolt fixing lug, and finally the bolt fixing lug is milled.

In the present invention, the plane projection shape of the melon-shaped member is approximately an isosceles trapezoid, the wide end of the melon-shaped member corresponds to the lower base of the isosceles trapezoid, and the narrow end corresponds to the upper base of the isosceles trapezoid. , the left and right sides of its length direction line are equivalent to the two waists of an isosceles trapezoid. The four sides of the "isosceles trapezoid" projected on the plane of the melon-shaped component are generally not straight lines, but have certain radians. The melon-shaped member itself contains a complex curvature, eg a certain curvature in both directions in two perpendicular directions.

Specifically, in the present invention, the handle of the C-clamp for applying force is on the upper side, and the C-type clamp clamps the melon-shaped member and the pressure-bearing plate downward. In the present invention, the precision and fixing efficiency of bolt fixing are higher than those of the C-type clamp, so the C-type clamp is used to assist and fasten with bolts.

In the present invention, in order to provide the accurate detection position of the feeler gauge during the precision detection, a theoretical line is generally set on the surrounding narrow-width panels. The function of the trajectory line and the product theoretical line is to provide a reference for whether a small amount of cutting is required during subsequent welding.

In a specific embodiment, in step 1, two to four pairs of C-shaped clamps are used to clamp both sides of the melon member, and the wide end of the melon member is punched by a CNC milling cutter and bolts are used to fix it. Fix, so that the wide end of the member and the bearing plate are fixed by bolts, then remove the C-clamp and clamp the two sides near the wide end of the melon member with the C-clamp, so that the inner bottom surface of the melon member and the surrounding The upper surface of the narrow panel is close to each other, use the CNC milling cutter to drill the two sides of the melon member near the wide end and fix it with bolts; finally remove the C-clamp and use the C-clamp to align the two sides near the narrow end of the melon member. Clamp the side part, use the CNC milling cutter to drill the two sides of the melon member close to the narrow end and fix it with bolts. After all the bolts are fixed, remove the C-clamp. In the present invention, in the process of fixing the melon petal member, the periphery of the inner bottom surface of the melon petal member must be completely in close contact with the upper surface of the surrounding narrow-width panels, so as to ensure the subsequent processing accuracy and the product theoretical line depicted on the melon petal member. accuracy. In the present invention, before the components are fixed, the components that pass the accuracy test generally only have a bit of non-fitting at the two sides near the wide end, while the wide end, the narrow end and the places on both sides near the narrow end generally fit well. In the present invention, when using the C-clamp to clamp both sides of the component, the C-clamp and the bolt are staggered by a distance in the direction of the length of the component, so as to open holes for the component and install the bolt to fix the component.

In a specific embodiment, in step 2, when the bolt fixing ears are milled, a thickness of 1 to 3 mm is not cut first, so as to prevent the melon flap member from rebounding and damage to the cutter; finally, manually cut off the uncut parts of the machine. Bolted lugs.

In the present invention, the thickness of the melon member is, for example, 18 mm. In the initial stage of milling, each bolt is generally bypassed to form a bolt fixing lug, so that the member can be well fixed on the bearing plate during the entire milling process. .

In a specific implementation manner, a theoretical line 21 is engraved downward on the top surface of the surrounding narrow-width panel and/or a blind slot-shaped let-down groove 22 is opened downward.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, some simple deductions and substitutions can also be made, all of which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. a kind of type face accuracy detection of large aluminum alloy bent member and milling method, the method includes using a kind of type face Accuracy detection and milling set composite, described device include that plate face erects the muti-piece card that setting is used to support aluminium alloy bent member Plate (1) is provided with the narrow type panel (2) of surrounding, the narrow type panel (2) of surrounding on the periphery for the top surface that muti-piece snap-gauge is collectively formed Top surface and the centre of muti-piece snap-gauge top surface be collectively formed device top surface, device top surface and aluminium alloy bent member product Theoretical profile is consistent, and the width of the narrow type panel of surrounding is 30~200mm, on the surrounding narrow type panel top surface to Under portray Molded Line (21) and/or offer the allowing of blind slot shape cutter groove (22) downwards, the component type face accuracy detection with Its periphery at least covers on partial-length and stretches out the narrow type panel of surrounding before milling, also solid in the narrow type below the panel of surrounding Surely it is provided with bearing plate (3), the width of the narrow type panel of surrounding is at least greater than in the width of part peripheral position bearing plate, it is described Device further includes for component to be stretched out to part and bearing plate other than surrounding narrow type panel periphery after component accuracy detection The bolt (4) being fixedly connected；Described method includes following steps,

Step A, positioning is placed: the aluminium alloy bent member positioning after hot bending is placed on such devices；

Step B, member type face and theoretical type at the clearance gauge measurement narrow type panel of surrounding type face accuracy detection: are used after component positioning Gap between face, that is, surrounding narrow type panel top surface, checks whether to meet the requirements；

Step C, component is fixed: after member type face to be detected precision is met the requirements, using bolt connecting elements and the bearing plate, Component is fixed；

Step D, carry out surplus milling to component: after component is fixed, Numerical Control Programming makes milling cutter according to desired guiding trajectory to component Carry out surplus milling.

2. the method according to claim 1, wherein being provided with Molded Line on the surrounding narrow type panel top surface (21) cutter groove (22) are allowed and, it is its side line that every, which allows in cutter groove close to the line that the side of member center position is intersected with top surface, In step B, the gap of the position within the component product dimension line collectively formed with clearance gauge measure theory line and the side line.

3. the method according to claim 1, wherein the snap-gauge be containing on plate thickness direction be through hole shape Hole to reduce the hollowed-out board of self weight, and the muti-piece snap-gauge includes the longitudinal snap-gauge (11) being arranged in a mutually vertical manner and lateral card Plate (12).

4. the method according to claim 1, wherein the spacing between parallel two pieces of adjacent longitudinal snap-gauges is 0.3m More than, the spacing between parallel two pieces of adjacent lateral snap-gauges is 0.3m or more.

5. the method according to claim 1, wherein the width of the narrow type panel of the surrounding be 40~150mm, The narrow type panel of surrounding with a thickness of 10~30mm.

6. the method according to claim 1, wherein the aluminium alloy bent member is melon lobed component, in institute It states and two radical theory lines is set on the narrow type panel of surrounding of device and two allow cutter groove, and described cutter groove is allowed to be arranged in component length The left and right sides of direction line, and Molded Line setting is in wide end corresponding with surface member width direction and narrow end, and two allow cutter groove Close member center position side line (221) and two radical theory lines collectively form the target size size of component product.

7. the method according to claim 1, wherein the bearing plate is arranged in the narrow type below the panel 10 of surrounding At~100mm, and bearing plate, with the narrow type panel parallel setting of surrounding or close to being arranged in parallel, bearing plate is fixedly welded on snap-gauge On.

8. the method according to claim 1, wherein the total quantity of the bolt is 6~20, and scattering device In the surrounding of component.

9. the method according to claim 1, wherein the width for allowing cutter groove is 12~20mm, depth is 5~ 10mm。

10. the method according to claim 1, wherein described device further includes being used for before accuracy detection by structure Part positions the positioning element being placed on device, and the positioning element includes the location hole and positioning pin being arranged on bearing plate Nail and/or the positioning element include the position line being arranged on device.