Electromagnetic forming on-line measuring device and measuring method

Abstract

The application discloses an electromagnetic forming online measuring device and a measuring method, and is characterized in that a curvature arc is arranged at one end of an electromagnetic forming coil assembly to adapt to the forming surface of the to-be-formed material with different shapes, the other end of the electromagnetic forming coil assembly is movably connected with a supporting rod, the electromagnetic forming coil assembly is driven to swing relative to the supporting rod through a motion device, and then the angle relationship between the electromagnetic forming coil assembly and the forming surface is calculated through the included angle between the electromagnetic forming coil assembly and the supporting rod; a distance detection device is arranged, the distance detection device is used for detecting the distance between the electromagnetic forming coil assembly and the forming surface of the to-be-formed material and the point cloud data of the forming surface, and then the electromagnetic force size and direction of the electromagnetic forming coil assembly are accurately adjusted through the angle relationship between the electromagnetic forming coil assembly and the forming surface, the distance and the point cloud data of the forming surface, so that the electromagnetic forming precision of the electromagnetic forming coil assembly on the to-be-formed material is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of electromagnetic forming processing, and relates to an online measurement device and method for electromagnetic forming. Background Technology

[0002] With the pursuit of lightweighting in aerospace, automotive, and other industries, lightweight aluminum alloys have found widespread application. Traditional methods of manufacturing aluminum alloy products are prone to defects such as cracking, springback, and wrinkling, which also reduce workpiece performance and dimensional accuracy. Electromagnetic forming, an emerging high-speed forming process, utilizes instantaneous pulsed magnetic fields to shape metal workpieces, overcoming the bottlenecks of existing metal processing technologies. It features high speed, non-contact operation, simple tooling, and high energy efficiency. High strain rates help improve the forming properties of aluminum, magnesium, and other alloys at room temperature, significantly increasing the forming limit of metals and obtaining high-quality formed workpieces.

[0003] Electromagnetic forming technology uses impact electromagnetic force applied to metal sheets or pipes to induce high-speed deformation. Due to the different shapes of metal sheets and pipes, problems arise when the forming coil is too far from or too close to the material being formed, or when it is not perpendicular to the normal to the material. These issues lead to reduced forming efficiency, increased production costs, and the inability to automate the process. Therefore, adjusting the distance and angle between the forming coil and the material to achieve automated production in electromagnetic forming is a pressing problem that needs to be solved.

[0004] Therefore, in view of the technical problem that existing electromagnetic forming technology cannot detect the angular relationship and spacing between the electromagnetic coil and the material to be formed online, the present invention discloses an online measurement device and measurement method for electromagnetic forming. Summary of the Invention

[0005] The purpose of this invention is to provide an online measurement device and method for electromagnetic forming, which can accurately detect the angular relationship and distance between the electromagnetic coil and the material to be formed online, thereby providing a guarantee for the automated production process of electromagnetic forming.

[0006] This invention is achieved through the following technical solution:

[0007] An online electromagnetic forming measurement device includes at least one electromagnetic forming coil assembly. The connecting end of the electromagnetic forming coil assembly is movably connected to a support rod. The measuring end of the electromagnetic forming coil assembly is provided with a curved arc. A motion device is provided between the electromagnetic forming coil assembly and the support rod. The motion device is used to drive the electromagnetic forming coil assembly to oscillate and rotate relative to the support rod. Several distance detection devices are uniformly arranged circumferentially around the measuring end of the electromagnetic forming coil assembly.

[0008] To accommodate different curved materials, a curvature arc is incorporated at the end of the electromagnetic forming coil assembly closest to the material. This arc ensures close contact with the material, reducing measurement errors. To measure the angular relationship between the electromagnetic forming coil assembly and the material, the end of the coil assembly closest to the support rod is movably connected to the support rod. A movable device causes the coil assembly to tilt relative to the support rod, creating an angle between the coil's axis and the support rod's axis. Once the curvature arc is in contact with the material, the angle between the coil's axis and the support rod's axis can be measured, allowing for the calculation of the angular relationship between the coil assembly and the material. To determine the distance between the electromagnetic forming coil assembly and the material, several distance detection devices are evenly distributed circumferentially around the end of the coil assembly closest to the material. These devices detect the distance between the coil assembly and the material.

[0009] By measuring the angular relationship and spacing between the electromagnetic forming coil assembly and the material to be formed, the magnitude and direction of the electromagnetic force applied by the electromagnetic forming coil assembly to the material to be formed at the corresponding position can be calculated, thereby ensuring the efficiency and accuracy of electromagnetic forming of the material to be formed.

[0010] To better realize the present invention, the electromagnetic forming coil assembly further includes an electromagnetic coil and a coil mounting housing. One end of the coil mounting housing is provided with a ball socket, and the end of the support rod is provided with a hemisphere. The hemisphere is movably connected to the ball socket. The other end of the coil mounting housing is provided with a curvature arc. The electromagnetic coil is disposed inside the coil mounting housing.

[0011] To better realize the present invention, further, four sets of distance detection devices are evenly arranged circumferentially on the outer side of the coil mounting housing.

[0012] To better realize the present invention, the length, width and depth of the detection space range formed by the four sets of distance detection devices are no greater than 200mm×200mm×40mm.

[0013] To better realize the present invention, the distance detection device further includes a laser emitter, a reflected light receiver, and a displacement sensor. The laser emitter is used to emit laser light towards the component under test. The reflected light receiver is disposed on one side of the laser emitter and is used to receive the light reflected by the component under test. The displacement sensor is connected to the reflected light receiver and is used to calculate the distance between the electromagnetic forming coil assembly and the component under test based on the reflected light.

[0014] An online measurement method for electromagnetic forming, based on the aforementioned online measurement device for electromagnetic forming, includes the following steps:

[0015] Step 1: Divide the material to be formed into several sub-regions based on its shape, and set up electromagnetic forming coil assemblies in several sub-regions. The relative tilting support rod and the electromagnetic forming coil assembly are arranged so that the curvature arc of one end of the electromagnetic forming coil assembly fits the contour of the material to be formed.

[0016] Step 2: Detect the angle between the axis of the electromagnetic forming coil assembly and the axis of the support rod, and then calculate the angular relationship between the electromagnetic forming coil assembly and the material to be formed;

[0017] Step 3: Detect the distance between the electromagnetic forming coil assembly and the material to be formed using a distance detection device, and detect the three-dimensional point cloud of the material to be formed in the current sub-region;

[0018] Step 4: Combine and merge the three-dimensional point clouds corresponding to several sub-regions to form the overall three-dimensional point cloud of the material to be formed.

[0019] To better realize the present invention, further, in step 2, the angle between the axis of the electromagnetic forming coil assembly and the axis of the support rod is 0°-60°.

[0020] To better realize the present invention, the dimensional accuracy of the three-dimensional point cloud obtained in step 3 is less than or equal to 0.1 mm.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] This invention provides an electromagnetic forming coil assembly with a curved arc at one end to accommodate the forming surface of materials of different shapes. The other end of the electromagnetic forming coil assembly is movably connected to a support rod. A motion device drives the electromagnetic forming coil assembly to deflect relative to the support rod. The angle between the electromagnetic forming coil assembly and the forming surface of the material is calculated using the angle between the axis of the electromagnetic forming coil assembly and the axis of the support rod. A distance detection device is installed around the electromagnetic forming coil assembly to detect the distance between the electromagnetic forming coil assembly and the forming surface, as well as the point cloud data of the forming surface. By using the angle relationship, distance, and point cloud data between the electromagnetic forming coil assembly and the forming surface, the magnitude and direction of the electromagnetic force of the electromagnetic forming coil assembly are accurately adjusted, ensuring the electromagnetic forming accuracy of the material. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the electromagnetic forming online measurement device;

[0024] Figure 2 This is a top view of the electromagnetic forming online measurement device;

[0025] Figure 3 This is a schematic diagram showing the contact between a curved arc and the material to be formed.

[0026] Among them: 1-Electromagnetic forming coil assembly; 2-Support rod; 3-Curvature arc; 4-Distance detection device. Detailed Implementation

[0027] The following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Example 1:

[0032] This embodiment provides an online electromagnetic forming measurement device, such as... Figure 1 and Figure 2As shown, it includes at least one electromagnetic forming coil assembly 1, with a support rod 2 movably connected to the connecting end of the electromagnetic forming coil assembly 1, and a curvature arc 3 provided at the measuring end of the electromagnetic forming coil assembly 1; a motion device is provided between the electromagnetic forming coil assembly 1 and the support rod 2, the motion device being used to drive the electromagnetic forming coil assembly 1 to oscillate and rotate relative to the support rod 2; and a plurality of distance detection devices 4 are uniformly arranged circumferentially around the measuring end of the electromagnetic forming coil assembly 1.

[0033] The electromagnetic forming coil assembly 1 includes an electromagnetic coil and a coil mounting housing. One end of the coil mounting housing is provided with a ball socket, and the end of the support rod 2 is provided with a hemisphere. The hemisphere and the ball socket are movably connected. The other end of the coil mounting housing is provided with a curvature arc 3. The electromagnetic coil is disposed inside the coil mounting housing.

[0034] The coil mounting housing is made of epoxy resin. The electromagnetic coil is placed inside the coil mounting housing, and the interior of the housing is filled with epoxy resin to fix and protect the electromagnetic coil. A ball-and-socket joint is provided at the center of one end of the coil mounting housing near the support rod 2. A hemisphere that rotatably engages with the ball-and-socket joint is provided at the end of the support rod 2. The other end of the support rod 2 is connected to a moving mechanism, which drives the electromagnetic forming coil assembly 1 and the support rod 2 to move. Through the rotatable engagement of the ball-and-socket joint and the hemisphere, the electromagnetic forming coil assembly 1 can tilt relative to the support rod 2. Figure 3 As shown, this ensures that the curvature arc 3 set on the end of the coil mounting housing near the material to be formed can fit tightly with the material to be formed in different shapes and contours.

[0035] An angle sensor is built into the coil mounting housing. This sensor detects the angle between the axis of the electromagnetic forming coil assembly 1 and the axis of the support rod 2 online. The angle between the electromagnetic forming coil assembly 1 and the material to be formed is calculated using this angle, ensuring that the angle between the normal of the contact point between the curved arc 3 and the material to be formed and the axis of the electromagnetic forming coil assembly 1 is less than or equal to 0.5°. Preferably, the contact position between the curved arc 3 at the end of the electromagnetic forming coil assembly 1 and the material to be formed is adjusted by a motion device, so that the angle between the normal of the contact point between the curved arc 3 and the material to be formed and the axis of the electromagnetic forming coil assembly 1 is 0°.

[0036] Several distance detection devices 4 are evenly spaced circumferentially around the end of the coil mounting housing near the material to be formed. The distance detection devices 4 measure the distance between the electromagnetic coil and the material to be formed online. By obtaining the angular relationship between the electromagnetic coil and the material to be formed, and the distance between the electromagnetic coil and the material to be formed, the magnitude and direction of the electromagnetic force applied by the electromagnetic forming coil to the material to be formed at the corresponding position are calculated, thereby ensuring the efficiency and accuracy of electromagnetic forming of the material to be formed.

[0037] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0038] Example 2:

[0039] This embodiment relates to an online measurement device for electromagnetic forming, which is an improvement on embodiment 1, such as... Figure 2 As shown, four sets of distance detection devices 4 are evenly arranged circumferentially on the outer side of the coil mounting housing; the length, width and depth of the detection space formed by the four sets of distance detection devices 4 are no greater than 200mm×200mm×40mm.

[0040] Four sets of distance detection devices 4 are flush around the coil mounting housing. Each distance detection device 4 includes a laser emitter, a reflected light receiver, and a displacement sensor. The laser emitter is used to emit a laser to the component under test. The reflected light receiver is located on one side of the laser emitter and is used to receive the light reflected by the component under test. The displacement sensor is connected to the reflected light receiver and is used to calculate the distance between the electromagnetic forming coil assembly 1 and the component under test based on the reflected light.

[0041] The laser emitter directs a laser beam onto the surface of the material to be formed. The laser beam reflected by the material is then received by an imaging element inside a reflective light receiver. By observing the different projection positions of the laser spot on the imaging element at different distances, the relationship between the imaging position and the optical projection can be obtained, thus determining the distance between the electromagnetic coil and the material to be formed.

[0042] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0043] Example 3:

[0044] This embodiment relates to an online measurement method for electromagnetic forming, implemented based on the online measurement device for electromagnetic forming described in Embodiment 1 or 2, and includes the following steps:

[0045] Step 1: Divide the material to be formed into several sub-regions based on its shape, and set up an electromagnetic forming coil assembly 1 in several sub-regions. The relative swing support rod 2 and the electromagnetic forming coil assembly 1 are arranged so that the curvature arc 3 at one end of the electromagnetic forming coil assembly 1 fits the contour of the material to be formed.

[0046] Step 2: Detect the angle between the axis of the electromagnetic forming coil assembly 1 and the axis of the support rod 2, and then calculate the angular relationship between the electromagnetic forming coil assembly 1 and the material to be formed;

[0047] Step 3: Detect the distance between the electromagnetic forming coil assembly 1 and the material to be formed using the distance detection device 4, and detect the three-dimensional point cloud of the material to be formed in the current sub-region;

[0048] Step 4: Combine and merge the three-dimensional point clouds corresponding to several sub-regions to form the overall three-dimensional point cloud of the material to be formed.

[0049] Furthermore, in step 2, the angle between the axis of the electromagnetic forming coil assembly 1 and the axis of the support rod 2 is 0°-60°.

[0050] Furthermore, the dimensional accuracy of the three-dimensional point cloud obtained in step 3 is less than or equal to 0.1 mm.

[0051] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An electromagnetic forming online measuring device, comprising at least one electromagnetic forming coil assembly (1), characterized in that, The connecting end of the electromagnetic forming coil assembly (1) is movably connected to a support rod (2), and the measuring end of the electromagnetic forming coil assembly (1) is provided with a curvature arc (3); a motion device is provided between the electromagnetic forming coil assembly (1) and the support rod (2), and the motion device is used to drive the electromagnetic forming coil assembly (1) to oscillate and rotate relative to the support rod (2); several distance detection devices (4) are uniformly arranged around the measuring end of the electromagnetic forming coil assembly (1) in the circumferential direction. The electromagnetic forming coil assembly (1) includes an electromagnetic coil and a coil mounting housing. One end of the coil mounting housing is provided with a ball socket, and the end of the support rod (2) is provided with a hemisphere. The hemisphere is movably connected to the ball socket. The other end of the coil mounting housing is provided with a curvature arc (3). An electromagnetic coil is provided inside the coil mounting housing. The coil mounting housing is made of epoxy resin. The electromagnetic coil is placed inside the coil mounting housing and the inside of the coil mounting housing is filled with epoxy resin. An angle sensor is built into the coil mounting housing. The angle sensor is used to detect the angle between the axis of the electromagnetic forming coil assembly (1) and the axis of the support rod (2) online.

2. The electromagnetic forming online measuring device according to claim 1, characterized in that, Four sets of distance detection devices (4) are evenly arranged circumferentially on the outer side of the coil mounting housing.

3. The electromagnetic forming online measuring device according to claim 2, characterized in that, The length, width, and depth of the detection space formed by the four sets of distance detection devices (4) shall not exceed 200mm×200mm×40mm.

4. The electromagnetic forming online measuring device according to claim 3, characterized in that, The distance detection device (4) includes a laser emitter, a reflected light receiver, and a displacement sensor. The laser emitter is used to emit laser light to the component under test. The reflected light receiver is located on one side of the laser emitter and is used to receive the light reflected by the component under test. The displacement sensor is connected to the reflected light receiver and is used to calculate the distance between the electromagnetic forming coil assembly (1) and the component under test based on the reflected light.

5. An online measurement method for electromagnetic forming, implemented based on the online measurement device for electromagnetic forming according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Divide the material to be formed into several sub-regions based on its shape, and set up an electromagnetic forming coil assembly (1) in several sub-regions. The relative sway support rod (2) and the electromagnetic forming coil assembly (1) are arranged so that the curvature arc (3) at one end of the electromagnetic forming coil assembly (1) fits the contour of the material to be formed. Step 2: Detect the angle between the axis of the electromagnetic forming coil assembly (1) and the axis of the support rod (2), and then calculate the angular relationship between the electromagnetic forming coil assembly (1) and the material to be formed; Step 3: Detect the distance between the electromagnetic forming coil assembly (1) and the material to be formed by the distance detection device (4), and detect the three-dimensional point cloud of the material to be formed in the current sub-region; Step 4: Combine and merge the three-dimensional point clouds corresponding to several sub-regions to form the overall three-dimensional point cloud of the material to be formed.

6. The method for an online electromagnetic forming measurement device according to claim 5, characterized in that, In step 2, the angle between the axis of the electromagnetic forming coil assembly (1) and the axis of the support rod (2) is 0°-60°.

7. The method for an online electromagnetic forming measurement device according to claim 5, characterized in that, The dimensional accuracy of the three-dimensional point cloud obtained in step 3 is less than or equal to 0.1 mm.

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