1, when the outfit holding clip of workpiece places workpiece, the cut place that must assure workpiece is located in machine tool workbench in the limit of fore-and-aft, transverse feed, avoid to exceed the limit. Should consider space of motion of silk of the electrode when cut at the same time. Clamping apparatus should choose as far as possible general (or standard) , place choosing clamping apparatus should facilitate outfit clip, facilitate the dimension of harmonious workpiece and machine tool concerns. When machining large mould, want special attention the orientation way of workpiece, when machining swift end especially, of workpiece be out of shape, gravitational action can make electrode silk by clamp, influence treatment. (1) cantilever type outfit places a figure if clip of outfit of 1 cantilever type pursues 1 is shown is cantilever means the workpiece that hold clip, outfit of this kind of means places convenient, versatility strong. But because workpiece one aspect of the matter is dangerous,extend, on surface of easy occurrence cut and workpiece, the verticality error between next plane. Use at the circumstance that treatment asks not tall or cantilever is shorter only. (2) outfit of the two end means that prop up places a figure if clip of outfit of the means of 2 two end that prop up pursues 2 are shown is two end outfit of the means that prop up places workpiece, outfit of this kind of means places convenient, stability, fixed position precision is tall, but unwell place larger part at installing. (3) outfit of the bridge-type means that prop up places a figure 3 bridge-type go maintaining means outfit to place this kind of means is the reload after filling up iron is placed to place workpiece on general clamping apparatus, if pursue,3 are shown. This kind of means installs clip to go to the lavatory, can use to big, medium, small-sized workpiece. (4) outfit of the board type kind that prop up places a figure if clip of outfit of the kind of 4 board type that prop up pursues 4 are shown is the board type kind that prop up the workpiece that hold clip. According to commonly used workpiece appearance and dimension, use the gripper shoe that has via to hold clip work. Precision of clip of outfit of this kind of means is tall, but versatility is poor. 2, the adjustment of workpiece uses above means to hold clip work, still must cooperate to look for execute to undertake adjustment, just can make the fixed position datum plane of workpiece parts the feed direction X of the working mesa with the machine tool and workbench, Y keeps parallel, in order to assure the relative position precision between the surface of a cut and datum plane. Look for square law commonly usedly to have: (1) search to pursueing with dial gauge 5 look for no less than with dial gauge the graph is shown 5 times, secure dial gauge with magnetic force dial framework in filar wearing or other locally, the measurement of dial gauge head and workpiece radical surface contact, reciprocating translation workbench, adjust the position of workpiece by dial gauge indicated value, till of dial gauge finger slant the numerical value that places limits to achieve a requirement. Search to answering to undertake on 3 mutual and perpendicular direction. (2) underline a law to search to pursueing 6 underline a law to search the cut graph of workpiece and fixed position are standard when the demand of mutual position precision between is not high, can use underline a law to search, if pursue 6. 7 are shown. Use the datum line that secures what go up in filar wearing to delimit the needle aims the lay off on workpiece, reciprocating translation workbench, range estimation delimits needle, fiducial the deviate circumstance between, adjust workpiece correct position. CNC Milling
CNC Machining