5results about How to "Guaranteed geometric tolerance" patented technology

This invention relates to the field of positioning technology for thin-walled workpieces, and discloses a positioning device for preventing offset of thin-walled workpieces based on CNC machine tools. It aims to solve the technical problems of easy deformation during positioning of thin-walled workpieces and poor adaptability of traditional clamping blocks. The device includes a CNC machine tool body, a rotating chuck, an adjustment drive assembly, a push rod assembly, and a tensioning positioning assembly. A frustum-shaped push block converts rotational motion into linear motion via a screw and nut mechanism. This, in conjunction with a limiting assembly, drives the push rod assembly to synchronously and uniformly extend and retract radially, causing a spring steel sheet with a pre-positioned section to achieve curvature self-adaptation. The pre-positioned section is a sliding compensation arc surface section, adapting to thin-walled pipes of different diameters while maintaining surface contact. The device has two sets of staggered tensioning positioning rings, forming a full-circumferential, gapless support for the inner wall of the pipe. This device avoids stress concentration problems caused by line contact, effectively preventing deformation of thin-walled pipes, balancing positioning firmness and deformation prevention requirements, and significantly improving the processing qualification rate and production efficiency of thin-walled pipes.

The utility model discloses a high-precision clamp for a CNC machine tool. The high-precision clamp comprises a base, an upper clamping mechanism, a lower clamping mechanism, a supporting mechanism and a positioning mechanism, wherein the upper clamping mechanism and the lower clamping mechanism are used for clamping sheet metal accessories; the supporting mechanism is used for supporting the sheet metal accessories; the multiple upper clamping mechanisms and the multiple lower clamping mechanisms are arranged, the upper clamping mechanisms and the lower clamping mechanisms interact with each other and clamp the outer edges of the metal plate accessories, and the multiple supporting mechanisms are located at the bottoms of the metal plate accessories. The multiple positioning mechanisms abut against the side face of the outer edge of the metal plate accessory. The upper clamping mechanism and the lower clamping mechanism are matched to clamp the outer edge of a metal plate accessory, the supporting mechanism supports the bottom, the positioning mechanism limits the installation position, multi-directional constraint is formed, and accurate positioning and firm clamping of the metal plate accessory are achieved through the synergistic effect of all the mechanisms. And the dimensional precision, form and location tolerance and the like of the machined surface meet the requirements.

The utility model relates to worm wheel machining equipment technical field, concretely relates to a worm wheel machining lathe, including the body and power structure, the body one end longitudinal rotation is provided with the rotating shaft, and the rotating shaft is fixedly provided with the workstation on the top of body, the rotating shaft upper end is provided with the worm wheel stop piece, and the lower end is connected with power structure, the body top and both sides all are provided with displacement transmission structure, and displacement transmission structure transmission is connected with the mounting seat, two opposite the mounting seat are provided with the external circle milling assembly and ring groove milling assembly respectively, and the other mounting seat is provided with the end face milling assembly and longitudinally rotates, the external circle milling assembly, ring groove milling assembly and end face milling assembly all are connected with power structure. The utility model only needs to clamp worm wheel workpiece once to complete the multiple milling process, eliminates the error due to multiple clamping, improves the precision of worm wheel machining.

This utility model discloses a lathe with interpolation function, comprising a frame, a first platform, a second platform, a first spindle assembly, and a second spindle assembly. The second spindle assembly is equipped with a first moving mechanism. Both the first and second spindle assemblies are equipped with chucks. The second platform has two second moving mechanisms, each of which is equipped with a third moving mechanism. Each of the third moving mechanisms is equipped with an interpolation mechanism, and each interpolation mechanism is equipped with a tool magazine mechanism. This utility model utilizes dual-spindle machining with the first and second spindle assemblies. The first moving mechanism enables the reciprocating movement of the second spindle, and the independently controllable second and third moving mechanisms allow for simultaneous parallel machining of two workpieces, full machining of the same workpiece, or collaborative machining of the same workpiece, improving production efficiency. The interpolation mechanism is used for error compensation, improving machining accuracy and quality.

The application discloses a mechanical mechanism zero position adjustment tool, and relates to the technical field of zero position adjustment tools, comprising a base, a sliding block, a cushion block for providing auxiliary support for a mechanical mechanism, a first variable-diameter pin shaft, a second variable-diameter pin shaft, at least one adjustable cushion block for keeping the mechanical mechanism in a horizontal state and a vernier caliper; wherein the base is provided with a guide rail and a mounting block, and the left end of the guide rail is connected with the right end of the mounting block. The application can meet the pin shaft hole requirements of different specifications of mechanical mechanisms by adjusting the diameters of the first variable-diameter pin shaft and the second variable-diameter pin shaft, meet the zero position length requirements of different mechanical mechanisms by changing the position of the sliding block, and keep the mechanical mechanism in a horizontal and stable state during measurement by adjusting the height of the adjustable cushion block.