Special portal type numerical-control milling machine for efficiently milling arc-shaped surface of tool

Abstract

The invention discloses a special portal type numerical-control milling machine for efficiently milling an arc-shaped surface of a tool. The special portal type numerical-control milling machine comprises a portal lathe body (1), an orthogonal dragging plate (2), a Z-direction dragging plate (3), a main shaft base plate (4), tapered iron (5), a movable workbench (6) and an electromagnetic workbench (7). According to the special portal type numerical-control milling machine disclosed by the invention, the inclined iron is lined between the Z-direction dragging plate and the main shaft base plate, so that the rotation axis of an electric main shaft and the up-down motion axis of the Z-direction dragging plate form an inclination angle of 45 degrees; during working, a disc-shaped milling cutter performs intercross milling on a main rear surface of a hand hay cutter workpiece in a mode that the cutting rotation axis and a cutting feeding direction tilt at an angle of 86 degrees so as to form the arc-shaped surface; the tilting mode enables the small-diameter disc-shaped milling cutter to meet milling forming for the arc-shaped surface of the main rear surface of the hand hay cutter workpiece, so that the tool cost is reduced, and milling vibrations are reduced, and therefore, the technical scheme of deep-feeding, quick-advancing and heavy-load efficient milling can be achieved; andmilling processing for the arc-shaped main rear surface hand hay cutter by a paper cutter is achieved, and therefore, the purposes of improving efficiency, reducing cost and suitable for large-scalebatch production are achieved.

Description

Technical field [0001] The invention relates to a numerical control milling machine, in particular to a special gantry-type numerical control milling machine for milling and processing the arc-shaped main back surface of a paper cutter guillotine cutter with high efficiency. Background technique [0002] The paper cutter is a kind of office stationery used for paper cutting. The main back of the cutter blade of the paper cutter is curved, that is, the cross-sectional projection is curved; the blank of the paper cutter to be processed is referred to as the guillotine below. Artifact, see image 3 , Figure 4 , Figure 5 ; [0003] To mill the arc-shaped main back surface of the guillotine workpiece, the prior art adopts a milling machine and a large-diameter disk milling cutter. The cutting axis of rotation is parallel to the cutting feed direction, and the end edge of the milling cutter is used to face the main back surface of the guillotine workpiece. Carry out phase cutting milli...

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Problems solved by technology

[0003] For milling the arc-shaped main back of the guillotine workpiece, the existing technology uses a milling machine and a disc-shaped milling cutter with a large diameter, in a parallel manner that the cutting rotation axis is parallel to the cutting feed direction, and the end face cutting edge of the milling cutter is used to align the main back of the guillotine workpiece. Perform phase cut milling to form arcs, see Figure 8 , Figure 9 ;Due to the large curvature of the curved surface behind the main workpiece of the guillotine, it must be processed with a large-diameter disc milling cutter. The cost of a large-diameter disc milling cutter is high, and the milling vibration is large. In order to ensure the smoothness of the milling process, only a small feed , milling at a slow speed, and the efficiency is low; in addition, during processing, the required interval between workpieces is large, and the number of clamping at one time is small, resulting in low efficiency and high cost, and it is difficult to adapt to large-scale batch processing and production. Therefore, the existing technology There are problems and deficiencies of low efficiency and high cost

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