Integral sheet metal self-resistance heating progressive forming device
A kind of incremental forming, sheet metal technology, applied in the direction of feeding device, storage device, positioning device, etc., can solve the problems of reduced spindle stiffness, high-speed friction affecting the surface quality of sheet metal, etc., to improve forming performance, easy temperature closed-loop control, The effect of small temperature gradients
Active Publication Date: 2017-09-05
BEIHANG UNIV
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Problems solved by technology
This method reduces the spindle stiffness due to the rotational degree of freedom, and the high-speed friction affects the surface quality of the sheet
Method used
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Embodiment Construction
[0049] The device consists of three-axis CNC machine tools, forming tools, sheet metal fixtures, power supplies, wires, insulating gaskets, temperature sensors, temperature controllers, and incubators. The main shaft of the three-axis CNC machine tool clamps the forming tool and moves along the set trajectory, causing continuous local deformation of the sheet metal, and finally produces the required parts. The device uses power supply, wires, sheet metal fixtures and sheet metal to form a current loop, and uses high temperature resistant insulating gaskets to reliably insulate the loop from the machine tool. Joule heat generated by 0-36V, 200-1000A low voltage and high current increases the temperature of the sheet.
[0050] to attach figure 1 As an example, the self-resistance heating incremental forming of the sheet metal as a whole and the double-point forming are described.
[0051] Use CAD software to build a three-dimensional model of the part, then use CAM software to...
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The invention discloses a self-blocked heating incremental forming device for a whole plate. The device comprises a three-axis numerical control machine tool, a forming tool, a plate clamp, a direct current power source, a wire, an insulation gasket, a temperature sensor, a temperature controller and an insulation box. A current loop is formed by the forming device and the plate through the power source, the wire and the plate clamp, and the temperature of the plate is increased through joule heat. The two ends of the plate are powered on, the whole plate is heated, and the temperature gradient is small. The semi-closed insulation box is installed, so that heat losses are reduced, and the energy utilization rate is increased; the temperature of the plate is measured through the temperature sensor, and the temperature of the plate is accurately controlled through closed-loop control. The technology can also be used for thick plate incremental forming machining with large forming force at the room temperature, and incremental forming machining of titanium alloy and magnesium alloy plates which are difficult to form at the room temperature.
Description
[0001] 【Technical field】 [0002] The invention relates to an integral self-resistance heating progressive forming device for sheet metal, which belongs to the technical field of sheet metal progressive forming processing. [0003] 【Background technique】 [0004] The commonly used technology in traditional sheet metal forming is die stamping. Due to its advantages of high production efficiency, high forming quality and less material consumption, it is more suitable for mass production of a single type of parts, and has long occupied a dominant position in modern industrial production. [0005] With the progress of the times, the demand for products tends to be personalized and novel, which requires enterprises to constantly update their products in order to occupy a place in the fierce market competition. The traditional mold stamping technology has a long mold development cycle and high capital cost, which can no longer meet the requirements of enterprises for the development ...
Claims
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Login to View More IPC IPC(8): B21D31/00B21D37/16B21D43/00
CPCB21D31/005B21D37/16B21D43/003
Inventor 李小强张永生李东升
Owner BEIHANG UNIV