A stackable molded part includes a runner portion that connects a plurality of parts, and a positioning portion that is formed on the runner portion, wherein the positioning portion protrudes in a shape of a column from the runner portion to at least one side in a stacking direction in which molded parts are stacked, wherein an end portion of the positioning portion of the molded part is engageable with an end portion of a positioning portion of another molded part that adjoins the molded part when these molded parts are stacked on top of each other, and wherein the positioning portion protrudes more than the plurality of parts in the stacking direction to the one side of the positioning portion.

A stackable molded part includes a runner portion that connects a plurality of parts, and a positioning portion that is formed on the runner portion, wherein the positioning portion protrudes in a shape of a column from the runner portion to at least one side in a stacking direction in which molded parts are stacked, wherein an end portion of the positioning portion of the molded part is engageable with an end portion of a positioning portion of another molded part that adjoins the molded part when these molded parts are stacked on top of each other, and wherein the positioning portion protrudes more than the plurality of parts in the stacking direction to the one side of the positioning portion.

A wheel bolt hole chamfer device is composed of a base, a support frame, a lower servo motor, a turntable, stop blocks, guide rails, strong springs, a driving friction wheel, driven shafts, driven friction wheels, chamfer cutters and the like. The device can be put into a production line as a fourth-procedure machining device, and bolt hole chamfers are no longer machined in three procedures, so that the three-procedure machining time is reduced; and after the fourth procedure for machining the bolt hole chamfers is supplemented, the machining time of a single wheel is shortened, and the efficiency is improved. The device integrates pitch diameter adjustment and rotating drive of the chamfer cutters, so that a drive system and a power system are greatly simplified, i.e., the manufacturing cost of the device is reduced, all bolt hole chamfers can be machined at the same time.

A wheel bolt hole chamfer device is composed of a base, a support frame, a lower servo motor, a turntable, stop blocks, guide rails, strong springs, a driving friction wheel, driven shafts, driven friction wheels, chamfer cutters and the like. The device can be put into a production line as a fourth-procedure machining device, and bolt hole chamfers are no longer machined in three procedures, so that the three-procedure machining time is reduced; and after the fourth procedure for machining the bolt hole chamfers is supplemented, the machining time of a single wheel is shortened, and the efficiency is improved. The device integrates pitch diameter adjustment and rotating drive of the chamfer cutters, so that a drive system and a power system are greatly simplified, i.e., the manufacturing cost of the device is reduced, all bolt hole chamfers can be machined at the same time.

A parts feeding apparatus includes: a parts feeder disposed on one side of a worktable where work is performed and having a plurality of feeder slots each for loading at least one parts box; a position mover adapted to load the parts boxes onto the parts feeder or unload the parts boxes loaded on the plurality of slots to move the parts boxes horizontally or vertically; a parts storage unit located to face the parts feeder and having a plurality of storage unit slots for loading at least one or more parts boxes to store the parts boxes to be fed to the parts feeder therein; and a control unit adapted to control the parts feeder and the position mover so that the parts boxes are changed in position and aligned.

A parts feeding apparatus includes: a parts feeder disposed on one side of a worktable where work is performed and having a plurality of feeder slots each for loading at least one parts box; a position mover adapted to load the parts boxes onto the parts feeder or unload the parts boxes loaded on the plurality of slots to move the parts boxes horizontally or vertically; a parts storage unit located to face the parts feeder and having a plurality of storage unit slots for loading at least one or more parts boxes to store the parts boxes to be fed to the parts feeder therein; and a control unit adapted to control the parts feeder and the position mover so that the parts boxes are changed in position and aligned.

A mechanism for machining a workpiece includes a fixing base, a driving member, a connecting member, a cutter, a first guiding sleeve, and a spring. The driving member is positioned above the fixing base. The connecting member is coupled to the driving member. One end of the cutter is fixed to the connecting member, and the cutter is passed through the fixing base to machine the workpiece positioned under the fixing base. The spring is positioned between the connecting member and the fixing base. The spring is compressed when the driving member drives the cutter away from the fixing base to machine the workpiece, and the spring restores to bring the cutter back toward the fixing base after the machining.

A mechanism for machining a workpiece includes a fixing base, a driving member, a connecting member, a cutter, a first guiding sleeve, and a spring. The driving member is positioned above the fixing base. The connecting member is coupled to the driving member. One end of the cutter is fixed to the connecting member, and the cutter is passed through the fixing base to machine the workpiece positioned under the fixing base. The spring is positioned between the connecting member and the fixing base. The spring is compressed when the driving member drives the cutter away from the fixing base to machine the workpiece, and the spring restores to bring the cutter back toward the fixing base after the machining.

A three-dimensional printer with improved adjustment mechanisms for calibrating the orientation of the build platform and an extrusion assembly to optimize the accuracy of models deposited on the build platform. The printer includes a frame carrying an extrusion assembly proximate the top, and a carriage within. A build platform is mounted on the top of the carriage. Carriage adjustment mechanisms are provided at at least two corners of the carriage for calibrating the orientation of the build platform with respect to the X-Y plane. An extrusion assembly adjustment mechanism is provided at at least one end of the extrusion mechanism for calibrating the orientation of the extrusion mechanism with respect to the Y-axis. A height adjustment mechanism is provided for translating the carriage within the frame along the Z-axis.

A machine tool for machining semi-finished aluminum or titanium alloy products has a supporting structure, an upright, a carriage and a working head. The supporting structure has a bench and a rear support rigidly connected to each other. The bench extends along a longitudinal direction, while the rear support extends both along the longitudinal direction and along a vertical direction. The supporting structure is provided with upright translation elements. The upright is connected to the supporting structure by the upright translation elements so as to translate along the longitudinal direction and is provided with carriage translation elements. The carriage is connected to the upright by the carriage translation elements so as to be translatable along the vertical direction. The machine tool has a first pair of carriage moving ratio motors and a second pair of carriage moving ratio motors positioned aboard the upright and engaging the carriage translation elements.