Abstract: A parameter analysis method and a parameter analysis system for metal additive manufacturing are provided. The parameter analysis method includes: establishing a powder bed model; simulating a multi-track melting result of the powder bed model according to a plurality of laser parameters to generate a melting model; analyzing the melting model to calculate a plurality of position divergences of a plurality of melting powders of the melting model, and defining a plurality of melting surface powders according to the position divergences; analyzing the melting surface powders to calculate a surface average curvature of the melting model; and determining a laser hatch in the laser parameters allows metal additive manufacturing to meet a quality as needed according to whether the surface average curvature is between a first curvature threshold and a second curvature threshold, the first curvature threshold being smaller than the second curvature threshold.

Abstract: A recoater collision prediction and calibration method for additive manufacturing and a system thereof are provided.

Abstract: A three-dimensional (3D) image dynamic correction evaluation and auxiliary design method for orthotics includes the following steps. 3D scanning information of the human body is obtained. A plurality of 2D images of the human body is obtained for identification, and the pixel values of the 2D images are calculated so as to synthesize an original 3D spine curve. The 2D images of the human body and the 3D scan information are synthesized. An image deformation prediction and correction method of body shape is used to generate a deformed body shape of the human body. A spine material properties and mechanical model prediction method is used to predict parameters of the position, direction and magnitude of the force applied by an orthotics to the human body according to the deformed body shape.

Abstract: A three-dimensional (3D) image dynamic correction evaluation and auxiliary design method for orthotics includes the following steps. 3D scanning information of the human body is obtained. A plurality of 2D images of the human body is obtained for identification, and the pixel values of the 2D images are calculated so as to synthesize an original 3D spine curve. The 2D images of the human body and the 3D scan information are synthesized. An image deformation prediction and correction method of body shape is used to generate a deformed body shape of the human body. A spine material properties and mechanical model prediction method is used to predict parameters of the position, direction and magnitude of the force applied by an orthotics to the human body according to the deformed body shape.

Abstract: A recoater collision prediction and calibration method for additive manufacturing and a system thereof are provided.

Abstract: A parameter analysis method and a parameter analysis system for metal additive manufacturing are provided. The parameter analysis method includes: establishing a powder bed model; simulating a multi-track melting result of the powder bed model according to a plurality of laser parameters to generate a melting model; analyzing the melting model to calculate a plurality of position divergences of a plurality of melting powders of the melting model, and defining a plurality of melting surface powders according to the position divergences; analyzing the melting surface powders to calculate a surface average curvature of the melting model; and determining a laser hatch in the laser parameters allows metal additive manufacturing to meet a quality as needed according to whether the surface average curvature is between a first curvature threshold and a second curvature threshold, the first curvature threshold being smaller than the second curvature threshold.

Abstract: The disclosure relates to ankle foot orthosis including foot plate, lower leg piece, first and second connecting parts, and pin. The first connecting part is connected to the foot plate, the second connecting part is connected to the lower leg piece, the first connecting part has an engagement portion, the second connecting part has a groove and an opening connected to the groove, the first connecting part is pivotably engaged with the second connecting part, the pin is detachably disposed on the first connecting part of the first pivoting mechanism, and the second connecting part has a first stopper and a second stopper spaced apart from each other. The first pivoting mechanism has a first detachable state; when the first pivoting mechanism is in first detachable state, the engagement portion is located at the opening and is detachable from the groove via the opening.

Abstract: A limb prosthesis including a palm, a forearm, an upper arm, an elbow joint and a wrist joint is provided. The palm has a first pivot and a first lock set. The upper arm has a socket. The elbow joint connects the forearm to the upper arm. The wrist joint includes a first connecting rod connected to the forearm. The first pivot rotatably penetrates through the first connecting rod. The first lock set is locked to the first pivot. A first wedge surface of the first lock set contacts a second wedge surface of the first connecting rod. By adjusting a distance between the first lock set and the first pivot, a magnitude of a forward force between the first wedge surface and the second wedge surface is adjusted, such that the palm is fixed relative to the first connecting rod or rotatable around an axial direction perpendicular to an extending direction of the forearm.

Abstract: A limb prosthesis including a palm, a forearm, an upper arm, an elbow joint and a wrist joint is provided. The palm has a first pivot and a first lock set. The upper arm has a socket. The elbow joint connects the forearm to the upper arm. The wrist joint includes a first connecting rod connected to the forearm. The first pivot rotatably penetrates through the first connecting rod. The first lock set is locked to the first pivot. A first wedge surface of the first lock set contacts a second wedge surface of the first connecting rod. By adjusting a distance between the first lock set and the first pivot, a magnitude of a forward force between the first wedge surface and the second wedge surface is adjusted, such that the palm is fixed relative to the first connecting rod or rotatable around an axial direction perpendicular to an extending direction of the forearm.

Abstract: An additive manufacturing method for a 3D object is provided and includes (a) providing a 3D digital model of the 3D object; (b) dividing the 3D digital model into repeat arrangement of at least one type of polyhedral 3D units and an X-Y plane is an acute angle or an obtuse angle; (c) cutting the 3D digital model along a Z-axis into a plurality of 2D slices; (d) defining a scanning path covering one of the 2D slices; (e) providing an energy beam to a material on a working plane along the scanning path to form a construction layer corresponding to the one of the 2D slices; and (f) repeating the steps (d) and (e) to build up the 3D object by adding a plurality of construction layers in sequence.

Abstract: An additive manufacturing method for a 3D object is provided and includes (a) providing a 3D digital model of the 3D object; (b) dividing the 3D digital model into repeat arrangement of at least one type of polyhedral 3D units and an X-Y plane is an acute angle or an obtuse angle; (c) cutting the 3D digital model along a Z-axis into a plurality of 2D slices; (d) defining a scanning path covering one of the 2D slices; (e) providing an energy beam to a material on a working plane along the scanning path to form a construction layer corresponding to the one of the 2D slices; and (f) repeating the steps (d) and (e) to build up the 3D object by adding a plurality of construction layers in sequence.