A device for improving the quality of non-magnetic metal powder laser selective sintering
A laser selective sintering and non-magnetic metal technology, which is applied in the direction of improving energy efficiency and process efficiency, can solve the problems of increasing the density of formed parts, offset of formed parts, and the density of deformed formed parts, so as to improve the overall quality , improve the quality, the effect of simple principle
Inactive Publication Date: 2015-12-09
XI AN JIAOTONG UNIV
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Problems solved by technology
However, powder spreading and sintering molding also has its own shortcomings. The formed parts will be deformed due to thermal stress, and the density of the formed parts needs to be improved. To solve the problem of thermal stress deformation, most of them use reasonable process parameters to minimize the accumulation of stress to control deformation. , in order to increase the density of the powder-coated sintered molded parts, the method of powder-coated stick rolling is basically used to increase the powder density. This method has a certain effect on increasing the density of molded parts, but this method also has shortcomings, that is, in When the powder spreading roller spreads the powder and rolls the powder, it will produce a certain force in the vertical downward direction and the powder spreading direction, and the formed metal parts will be displaced under the action of the force, which will cause the deviation of the formed part and affect the quality of the formed part
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[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0012] Referring to Figure 1, figure 2 , a device for improving the forming quality of non-magnetic metal powder laser selective sintering,
[0013] It includes a powder tank composed of four insulating side plates 2 and a bottom plate 4. A horizontal support plate 3 is arranged in the powder tank. The powder tank and the support plate are made of non-conductive materials, and their function is to provide insulation conditions and prevent leakage . Install suction cups 1 (electromagnetic or permanent magnet) on the two opposite side plates of the powder tank, one of the suction cups is the N pole, and the other suction cup is the S pole (the S pole is opposite to the N pole). Magnetic field; Electrode plates 8 are installed on the inner walls of the other two opposite side plates of the powder tank. Holes are drilled on the side pla...
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The invention discloses a device for improving the selective laser sintering shaping quality of nonmagnetic metal powder. The device comprises a powder slot, wherein the powder slot is formed by four lateral plates and a soleplate, and a horizontal supporting plate which can upwards and downwards move is arranged in the powder slot. The device is characterized in that the lateral plates and the soleplate are made of insulating materials, two electromagnetic or permanent-magnet sucking disks are respectively and additionally installed outside two opposite lateral plates of the powder slot, one sucking disk is an N pole, the other sucking disk is an S pole, and two electrode plates are respectively and additionally installed on the inner walls of the other two opposite lateral plates of the powder slot.
Description
technical field [0001] The invention relates to a laser metal direct forming device, which can be used for powder laying and sintering forming of non-magnetic metal powder to manufacture metal parts and the like. Background technique [0002] In the field of laser metal direct forming, laser metal selective sintering is one of the hot research areas. It spreads metal powder directly on the support plate of the powder tank, and then directly burns the powder with a laser to melt and bond the powder to form metal parts. Compared with the traditional machining forming, this forming method has many advantages. It does not need any molds, the principle is simple, it can shorten the product development time and save the development cost. However, powder spreading and sintering molding also has its own shortcomings. The formed parts will be deformed due to thermal stress, and the density of the formed parts needs to be improved. To solve the problem of thermal stress deformation, m...
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IPC IPC(8): B22F3/105
CPCY02P10/295Y02P10/25
Inventor 李涤尘张连重张安峰靳忠民
Owner XI AN JIAOTONG UNIV