A kind of steel construction machining process for through hole
Technical field
The present invention discloses a kind of processing technology of through hole, particularly a kind of processing technology of steel construction through hole.
Background technology
The through hole that in structure steel fabrication, some size is large often can not process in advance because of material require bending, volume circle.And because there has been shape after steel structure forming, boring difficulty strengthens, borehole accuracy declines, and the efficiency of processing and manufacturing is extremely low.On steel construction, generally process through hole can adopt Twist Drill, also can with processing modes such as radial drill boring cutter bore holes.
Low by Twist Drill efficiency, the range of work is smaller simultaneously, usually can only process the hole of D25.For the hole that size is large, need substep processing, first machining small, is then enlarged to required size gradually.Because fluted drill length is longer, bore the little and poor rigidity of core diameter, have again the impact of chisel edge, the easy deflection of drill bit, aperture easily expands, and the surface quality in hole is poor, and during drilling, axial force is large.This processing method wastes time and energy, and production efficiency is low, and machining accuracy is low, and cost of labor is very high.
Another kind method utilizes radial drill, uses through hole boring cutter to carry out machining hole.Still needing subdrilling bottom outlet before bore hole, take bottom outlet as support guide, then utilizes boring cutter bore hole.Need in process repeatedly to adjust cutter head overhang, need size until be worked into.
Require higher to the shape of workpiece, size, clamping when utilizing radial drill bore hole, operation strategies is narrow.In addition due to machine tool structure, not extremely, main shaft is thin again for the rocking arm of radial drilling machine and main spindle box lock, and main shaft vibrations in boring hole are very serious, affect the precision of bore hole.
Summary of the invention
The object of the invention is to overcome above deficiency, provide a kind of and reduce labor strength, working (machining) efficiency significantly improves, and hole machined precision is high, cost-saving steel construction machining process for through hole.
Object of the present invention is achieved through the following technical solutions: a kind of steel construction machining process for through hole, comprises the following steps:
A, location: first positioning marking stamp sample and rush a little on workpiece, must guarantee before boring that drill is in place completely, not have the phenomenon loosening or not have clamping; Without iron filings under guarantee rig magnetic patch, adsorption plane is smooth, and machine is without waving or complete adsorption phenomena;
B, boring: by starting boring after hollow boring bit thimble quick position guiding during boring, answer feed slowly steady 80 ~ 125r/m when boring just starts, can accelerate feed velocity 200 ~ 315r/m after incision 1-2mm.
C, go out cutter: suitably slow down when going out cutter feeding speed 0.1 ~ 0.13mm/r, intermediate cut process should keep feed even, starts to hole until the overall process of hole should keep cooling abundant, cutting fluid can be adopted to cool; Described drill is hollow magnetic drill.
The present invention compared with prior art has the following advantages:
Reduce labor strength, working (machining) efficiency significantly improves, and hole machined precision also increases, and for company has saved cost, produces considerable economic benefit.
detailed description of the invention:
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and this embodiment only for explaining the present invention, does not form limiting the scope of the present invention.
The detailed description of the invention of a kind of steel construction machining process for through hole of the present invention, comprises the following steps:
A, location: first positioning marking stamp sample and rush a little on workpiece, must guarantee before boring that drill is in place completely, not have the phenomenon loosening or not have clamping; Without iron filings under guarantee rig magnetic patch, adsorption plane is smooth, and machine is without waving or complete adsorption phenomena;
B, boring: by starting boring after hollow boring bit thimble quick position guiding during boring, answer feed slowly steady 80 ~ 125r/m when boring just starts, can accelerate feed velocity 200 ~ 315r/m after incision 1-2mm.
C, go out cutter: suitably slow down when going out cutter feeding speed 0.1 ~ 0.13mm/r, intermediate cut process should keep feed even, starts to hole until the overall process of hole should keep cooling abundant, cutting fluid can be adopted to cool; Described drill is hollow magnetic drill.
Present invention reduces labor strength, working (machining) efficiency significantly improves, and hole machined precision also increases, and for company has saved cost, produces considerable economic benefit
The another statement of applicant, the present invention illustrates implementation method of the present invention and apparatus structure by above-described embodiment, but the present invention is not limited to above-mentioned embodiment, does not namely mean that the present invention must rely on said method and structure could be implemented.Person of ordinary skill in the field should understand, any improvement in the present invention, replaces and the interpolation of step, concrete way choice etc., all drop within protection scope of the present invention and scope of disclosure implementation method equivalence selected by the present invention.
The present invention is not limited to above-mentioned embodiment, and all employings and analog structure of the present invention and method thereof realize all modes of the object of the invention, all within protection scope of the present invention.