Movable clamping device for profiling milling of large sheet metal parts

Abstract

The utility model belongs to the field of aluminum alloy parts of large flat plate aircrafts, and relates to a movable clamping device for profiling milling of large sheet metal parts. Comprising a universal wheel, an electromagnetic clamping device, a cushion block and a power supply, when the device works, a power supply is switched on, the cushion block is arranged between the woolen material and the sample plate, the lower surface of the woolen material is attached to one electromagnetic clamping device, the other electromagnetic clamping device is placed on the upper surface of the sample plate, and the woolen material and the sample plate are fixed through magnetic attraction force between the two electromagnetic clamping devices. And the multiple movable clamping devices are used for jointly supporting and clamping the blank and the molded surface of the sample plate. The electromagnetic clamping device is used, so that the time required by thread clamping can be effectively shortened, interference with a milling cutter is avoided in the middle milling process, the position of a clamp does not need to be adjusted, and the position of a part cannot be shifted due to the adjustment of the clamp.

Description

Technical Field

[0001] The utility model belongs to the field of large flat-plate aircraft aluminum alloy parts and relates to a large sheet metal part copying milling and moving clamping device. Background Art

[0002] Modern aircraft are mainly composed of internal skeletons and external skins made of sheet metal materials. In modern aircraft structures, the number of sheet metal parts accounts for a relatively large proportion of the total number of aircraft structural parts. A fighter jet has about 10,000 pieces, a bomber has about 40,000 pieces, and a large transport aircraft has about 60,000 pieces. Moreover, these sheet metal parts are constrained by the starting shape and limited space, and have various shapes, sizes, and varieties. Most parts are produced by cutting according to the unfolded size first, and then forming on special tooling.

[0003] Then the production of flat parts not only includes the production of finished parts, but also needs to provide unfolding materials for the production of bent plates, skins, etc. For the production of flat parts, the current domestic main processing methods are CNC milling and sheet metal die-cutting. However, due to environmental impact, some parts cannot provide digital unfolding models, and because most parts are multi-variety and small-batch production methods, the programming time has a greater impact on the CNC processing cycle, while the sheet metal die-cutting processing method can greatly shorten the part processing cycle.

[0004] In the process of template milling, due to the large clamping force required, a bow clamp is needed to clamp the parts and the template up and down. In order to prevent the parts from being clamped, a wooden board is also needed to be placed at the clamping position. A certain height needs to be padded between the template and the parts to ensure the contact gap between the tool and the support column. Production is completed by template milling, but there are the following deficiencies and defects in milling.

[0005] (1) The bow clamp should be clamped according to the size of the part. The part blank, pad, and template should be placed in the jaws along the edge of the part in sequence, and then the part and the template are clamped by a screw. The threaded connection is time-consuming and labor-intensive.

[0006] (2) Since the unfolded material needs to be shaped later, the soft material state (2A12-O) is generally used for cutting the shape. However, the clamping area of ​​the bow-shaped clamp is small, the pressure is large, and the hardness of the jaws is small compared to the material of the part, which makes it easy to damage the part.

[0007] (3) Figure 1 Since the contact between the bow clamp and the table top is mainly based on the bottom surface of the bow clamp, the bow clamp and the table top move by sliding friction during processing. And since the tool cutting requires a certain amount of force, its overall movement is difficult. Large parts require multiple people to operate at the same time, which is time-consuming and labor-intensive.

[0008] (4) During the milling process, due to the interference between the milling tool and the bow clamp, the bow clamp needs to be disassembled continuously, which affects the processing efficiency. The disassembly process may also cause misalignment, resulting in deviation in part processing.

[0009] (5) And because there are many aluminum pins on the table during milling, they are easy to get stuck between the two, making movement more difficult and easily scratching the parts. Utility Model Content

[0010] Purpose of the utility model

[0011] The utility model overcomes the shortcomings of the prior art and provides a clamping and moving device for processing large sheet metal milling parts, thereby reducing the need for constant disassembly of fixtures and scratching of parts during the milling process.

[0012] Technical Solution

[0013] A mobile clamping device for profiling and milling large sheet metal parts, comprising a universal wheel 1, an electromagnetic clamping device 3, a cushion block 4, and a power supply 5;

[0014] The universal wheel 1 is welded to the electromagnetic clamping device 3 as a whole, and the power supply 5 supplies power to the electromagnetic clamping device 3. When working, the power supply 5 is turned on, and the cushion block 4 is arranged between the rough material and the template. The lower surface of the rough material is against the electromagnetic clamping device 3, and another electromagnetic clamping device 3 is placed on the upper surface of the template. The rough material and the template are fixed by the magnetic attraction between the two electromagnetic clamping devices 3. A plurality of movable clamping devices are arranged to jointly support and clamp the rough material and the template profile.

[0015] Furthermore, it also includes a brush 2, and the brush 2 is arranged on the circumference of the universal wheel.

[0016] Furthermore, the electromagnetic clamping device 3 includes an outer frame 6 and an electromagnetic device 7, and the electromagnetic is arranged in a groove of the outer frame.

[0017] Furthermore, the universal wheel 1 is made of plastic.

[0018] Furthermore, the cushion block is made of non-metallic material.

[0019] Furthermore, the total height of the cushion block and the template should be higher than the height of the milling cutter.

[0020] The beneficial effects of this application are:

[0021] (1) The use of electromagnetic clamping device can effectively reduce the time required for thread clamping, and there will be no interference with the milling cutter during the intermediate milling process. There is no need to adjust the position of the fixture, and the parts will not be displaced due to the adjustment of the fixture.

[0022] (2) The clamping force can also be determined by the current. The size and hardness of the electromagnetic clamping device can be adjusted according to the size and material of the parts, which increases the contact area and reduces the local pressure. The parts are not easily deformed or dented.

[0023] (3) The universal wheel can reduce friction resistance and movement resistance, making movement during milling more labor-saving, and the brush can push the aluminum pin away to reduce unnecessary scratches. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the schematic diagram of the milling and cutting of large sheet metal parts before improvement.

[0025] Figure 2 This is a schematic diagram of the clamping of sheet metal parts by die milling.

[0026] Figure 3 : Schematic diagram of magnetic clamping device 3,

[0027] Figure 4 Schematic diagram of the tool used for sheet metal milling.

[0028] Figure 5 Figure 1: Schematic diagram of the milling of large sheet metal parts improved using this clamping device. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the embodiments. The following are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Figure 1 In the process, the template and the part rough material are clamped by a vise. When moving, the bottom of the vise is manually pushed to slide on the platform for milling.

[0031] Figure 2 The invention comprises a universal wheel 1, a brush 2, an electromagnetic clamping device 3, a cushion block 4 and a power supply 5.

[0032] Figure 3 In the embodiment, an outer frame 6 and an electromagnetic device 7 are included. The electromagnetic device is arranged in a groove of the outer frame, and the electromagnetic clamping device is controlled by a power supply 5.

[0033] Figure 4 In the middle, the upper tool bar contacts the template against the column to determine the shape, and the blade is used to mill the rough material;

[0034] A mobile clamping device for profiling and milling large sheet metal parts, comprising a universal wheel 1, an electromagnetic clamping device 3, a cushion block 4, and a power supply 5;

[0035] The universal wheel 1 is welded to the electromagnetic clamping device 3 as a whole, and the power supply 5 supplies power to the electromagnetic clamping device 3. When working, the power supply 5 is turned on, and the cushion block 4 is arranged between the rough material and the template. The lower surface of the rough material is against the electromagnetic clamping device 3, and another electromagnetic clamping device 3 is placed on the upper surface of the template. The rough material and the template are fixed by the magnetic attraction between the two electromagnetic clamping devices 3. A plurality of movable clamping devices are arranged to jointly support and clamp the rough material and the template profile.

[0036] In a certain embodiment of the utility model, it further comprises a brush 2, which is arranged on the circumference of the universal wheel and is used to remove aluminum chips generated during the milling process.

[0037] In a certain embodiment of the present invention, the electromagnetic clamping device 3 comprises an outer frame 6 and an electromagnetic device 7, and the electromagnetic is arranged in a groove of the outer frame.

[0038] In a certain embodiment of the present invention, the universal wheel 1 is made of plastic material to avoid electromagnetic influence on the universal wheel when power is turned on.

[0039] In a certain embodiment of the present invention, the pad is made of non-metallic material, but does not affect electromagnetic transmission.

[0040] In one embodiment of the utility model, the total height of the cushion block and the template should be higher than the height of the milling cutter and lower than the height of the milling cutter support column. The height of the part blank is maintained in the middle part of the milling cutter blade to ensure that the milling cutter support column can be completely against the template during the milling process and the blade can perform milling processing on the rough material.

[0041] The method of using the utility model is as follows:

[0042] Step 1: If Figure 2 Place a pad between the template and the rough material of the part, place the template on the pad, and the rough material of the part under the pad, ensuring that the projection of the template is completely within the rough material of the part;

[0043] Step 2: If Figure 4 Arrange the electromagnetic clamping devices evenly around the sample and the rough material according to the shape of the sample and the parts;

[0044] Step 3: If Figure 4 Align the electromagnetic clamping device up and down, then power it on to clamp the sample and the part raw material;

[0045] Step 4: Move the clamped template and rough material toward the tool. When the tool bar leans against the template, it means that the shape of the part is consistent with the size of the template. Then move along the shape of the template until a part identical to the template is milled out.

[0046] Step 5: Turn off the power, remove the fixture, take down the parts and sample, and complete the processing.

[0047] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless defined as here. The specific implementation methods described above further explain the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A mobile clamping device for milling and cutting large sheet metal parts, characterized in that: It includes universal wheels, electromagnetic clamping devices, pads, and power supplies; The universal wheel is welded to the electromagnetic clamping device as a whole, and a power source is used to supply power to the electromagnetic clamping device. When working, the power source is turned on, and a pad is arranged between the rough material and the template. The lower surface of the rough material is against the electromagnetic clamping device, and another electromagnetic clamping device is placed on the upper surface of the template. The rough material and the template are fixed by the magnetic attraction between the two electromagnetic clamping devices. A plurality of movable clamping devices are arranged to jointly support and clamp the rough material and the template profile.

2. The device according to claim 1, characterized in that It also includes a brush, which is arranged on the circumference of the universal wheel.

3. The device according to claim 2, characterized in that The electromagnetic clamping device comprises an outer frame and an electromagnetic device, wherein the electromagnetic device is arranged in a groove of the outer frame.

4. The device according to claim 3, characterized in that The universal wheel is made of plastic.

5. The device according to claim 4, characterized in that The cushion block is made of non-metallic material.

6. The device according to claim 5, characterized in that The total height of the spacer and the template should be higher than the height of the milling cutter.

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