Device for maintaining overall temperature of working cylinder balanced and control method of device

Abstract

The invention discloses a device for maintaining the overall temperature of a working cylinder balanced and a control method of the device. The device mainly comprises a heating device, a heat preservation device, a detection device and a control unit and can achieve slow and balanced change of the temperature of an area where a forming workpiece is located. The control method of the device mainly comprises the following steps: calculating the position and the height of the forming workpiece in the working cylinder via slice preview; calculating the thickness and the shape of the forming workpiece via slice preview; and simulating the heat load data model of the working cylinder. The device and the control method can keep the change rate of temperatures of all areas to be consistent, can reduce warping deformation and defects of mechanical property caused by non-uniform heat dissipation of the forming workpiece due to sudden change of temperature, and can ensure the sintering quality of the forming workpiece.

Description

technical field [0001] The invention belongs to the field of laser sintering rapid prototyping, and in particular relates to a device and a method for maintaining the overall temperature balance of a working cylinder. Background technique [0002] Rapid Prototyping (RP for short) is a new advanced manufacturing technology that emerged and developed rapidly in the late 1980s and early 1990s. It is a technology for rapidly manufacturing three-dimensional physical entities of arbitrary complex shapes directly driven by CAD models. general term. Selected Laser Sintering, referred to as SLS, uses lasers to process powder materials (nylon, nylon glass fiber, nylon carbon fiber, nylon aluminum powder, PS material and various metal materials including: die steel, titanium alloy, aluminum alloy and CoCrMo alloy , iron-nickel alloy, etc.) direct sintering molding system. Before starting the processing, first raise the temperature of the working chamber filled with protective gas and...

AI Technical Summary

Problems solved by technology

However, the diversity of molded parts, and the placement and height of molded parts will cause inconsistency in temperature changes in the working cylinder area, and the cooling change of temperature can easily cause molded parts to be uneven due to uneven heat dissipation. Part warping deformation and mechanical performance defects

In the prior art, the temperature control of the cylinder body of the working cylinder adopts a simple and single control method, and there is no regional control, and there is no combination of the position, height, and complexity and thickness of the molded parts. The thermal load data model of each working cylinder is intelligently analyzed, so that it can accurately control the temperature change process of the working cylinder

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