Additive-subtractive four-station near-net forming equipment and forming method

Abstract

The invention provides additive-subtractive four-station near-net forming equipment and a forming method, and belongs to the technical field of additive manufacturing. The additive-subtractive four-station near-net forming equipment comprises a body mechanism, wherein the body mechanism comprises two three-axis transmission mechanisms and a four-station movement mechanism arranged below the three-axis transmission mechanisms; the two three-axis transmission mechanisms comprise a No.1 three-axis transmission mechanism and a No.2 three-axis transmission mechanism; the four-station movement mechanism comprises a first movement mechanism and a second movement mechanism; the first movement mechanism and the second movement mechanism are arranged in parallel to form four stations; an additive manufacturing module is installed on the No.1 three-axis transmission mechanism; and a subtractive manufacturing module is mounted on the No.2 three-axis transmission mechanism. Additive manufacturing and subtractive manufacturing are controlled through the double transmission mechanisms respectively, four-station mutual conversion is adopted, additive manufacturing and subtractive manufacturing oftwo parts are achieved at the same time, alternation and replacement of the additive manufacturing process and the subtractive manufacturing process are achieved very quickly, the machining efficiencyis effectively improved, and the machining precision of the parts is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a four-station near-net forming equipment and forming method for adding and subtracting materials. Background technique [0002] After decades of development, additive manufacturing technology has shown great advantages over traditional processing methods in the manufacture of complex structural parts with its advantages of speed, flexibility, and low cost. The advantages of short manufacturing cycle, high automation, and less material consumption make up for the shortcomings of traditional manufacturing processes, making this technology more and more widely used. However, due to the influence of powder size, laser focus spot size, and discretized layering technology in the additive manufacturing process, the geometric accuracy and surface finish of the metal parts produced are not ideal, making the shape of the formed parts impossible to achieve direct...

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Problems solved by technology

[0005] The following problems exist in all the above existing technologies: 1. The additive module and the subtractive module can only have one job at a time, and the two stations are repeatedly switched to each other, resulting in low forming efficiency; 2. The additive module and the subtractive module each time All work must be repositioned, especially the processing axis of the additive module installed on the robot motion mechanism and the spindle axis of the subtractive module due to installation or repeated positioning errors, resulting in a discrepancy between the position center of the additive manufacturing and the axis of the subtractive manufacturing. 3. The robot's operating mechanism is flexible but poor in rigidity. During the forming process, especially during the material reduction process, it is easy to produce processing deviations, resulting in poor processing accuracy. Up to the standard or failure of forming; 4. During the process of additive manufacturing and subtractive manufacturing, powder, chips, etc. cannot be cleaned in time on the same platform, causing subsequent process interference and resulting in forming failure

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