3results about How to "Avoid repeated positioning errors" patented technology

The invention discloses a line-shaped shaft multi-procedure combined machining device, and relates to the technical field of machine tool parts, the line-shaped shaft multi-procedure combined machining device comprises a positioning block, a pressing mechanism, a positioning plate and a cutter, the positioning block is provided with a positioning tool, and the positioning block is operably installed on a chuck; the hold-down mechanism and the positioning block are oppositely arranged, the hold-down mechanism and the positioning block operably clamp the linear shaft in the radial direction, and the hold-down mechanism and the chuck rotate synchronously; the positioning plates are symmetrically and fixedly arranged on the side face of the positioning block and operably clamp the linear shaft in the axial direction. The positioning plates are symmetrically fixed to the side faces of the positioning blocks, axial movement is effectively limited, and the clamping stability is improved; by rotating the positioning block by a certain angle, only a cutter needs to be replaced in the middle, the linear shaft does not need to be repositioned, different positions on the linear shaft can be machined, repeated positioning errors caused by multiple times of clamping in traditional machining are avoided, and machining precision and efficiency are remarkably improved.

The invention discloses an all-attitude five-axis turning and milling combined machine tool matched with a non-orthogonal main shaft, and belongs to the technical field of high-end numerical control machine tools. According to the technical scheme, the turning and milling machine comprises a machine body and a turning and milling workbench arranged on the machine body, and a sliding seat is movably arranged on the machine body; the X-axis transmission system is arranged on the lathe bed, is in driving connection with the sliding seat and is used for driving the sliding seat to move in the X-axis direction; the Z-axis transmission system is arranged on the sliding seat; the spindle box is in driving connection with the Z-axis transmission system and used for moving in the Z-axis direction. And the turning and milling main shaft is rotatably connected to the main shaft box. The invention has the following beneficial effects: through the combined design of a series of technical characteristics of the 45-degree non-orthogonal main shaft and the-30-180-degree all-attitude adjusting structure thereof, the long-standing technical problems of limited machining range, insufficient angle adjusting precision, low multi-process circulation efficiency and the like of the traditional orthogonal main shaft machine tool are solved; and the machining flexibility, the positioning precision, the whole machine rigidity and the process adaptability are all substantially improved.

The application relates to the technical field of tractor rear axle housing machining equipment, in particular to a tractor rear axle housing machining positioning device, which comprises a base; the number of the base is two, the two bases are symmetrically arranged left and right, the upper surface of the base is provided with a base seat, the middle part of the upper surface of the base seat is provided with a positioning groove, the left and right sides of the upper surface of the base seat are respectively provided with a hinge bracket I and a hinge bracket II, the hinge bracket I is rotationally connected with an L-shaped clamping plate through a pin shaft I, and the hinge bracket II is rotationally connected with an arc-shaped pressing plate through a pin shaft II. The device is innovatively clamped and fixed from the side of the rear axle housing, the structure completely avoids shielding the two ends and the middle region of the housing, the mounting holes at the two ends of the housing and the mounting hole of the central main speed reducer are completely exposed after one-time clamping, therefore, the boring machining of all key hole positions can be continuously completed in the same clamping state without disassembling the workpiece or replacing the clamp in the middle.