Two, background technology
Planer is a kind of common metal cutting process equipment, is divided into two kinds of metal-planing machine and shaping machines usually.Wherein metal-planing machine is mainly used in the planing operation of heavy parts, and shaping machine is used for the planing operation of middle-size and small-size part more.Because the shaping machine volume is little, price is low, so application surface is comparatively extensive.Existing shaping machine version is the top that planer head is arranged on ram, ram is installed in the cantilever support mode and is reciprocatingly slided, and the shortcoming that this cantilever support mode is brought is exactly that supporting rigidity is relatively poor, and vibration is bigger during planing, thereby machining accuracy is lower, and ram weares and teares easily.When machinery or fluid pressure drive device promoted ram and move to range by original position, ram was increased progressively by the influence of planer head gravity or cutting force gradually, and the amount of deflection at planer head place also constantly increases.And owing to have the gap between ram and the guide rail, under the gravity effect, also there is the trend that presses down in the ram front end, and has more aggravated planer head displacement in vertical direction; When arriving range, planer head reaches maximum in the skew of this position, in this motion process, the running orbit of cutter in the space that is installed on the planer head is not straight line, but curve of bending gradually, so just cause the mismachining tolerance of part bigger, and this situation with the length of cantilever also be the lengthening of ram stroke and more serious, this has just limited the axial length of institute's processing parts.Because ram adopts cantilever design,, guide rail also can reduce processing precision of products greatly again even producing a spot of wearing and tearing.In addition, in order to support the planer head that overhangs, the bed ways face must be made longlyer, has so also increased Master Cost and manufacturing cost.
Three, summary of the invention
1, goal of the invention: the purpose of this utility model provides the planer of a kind of good rigidly, double supporting structure that intensity is high, and its machining accuracy height is applied widely, compact conformation, low cost of manufacture.
2, technical scheme: described in the utility model double support planer bed, it is characterized in that: it comprises lathe bed, left and right sides bearing, ram, guide rail, guide rail slide block, planing tool mechanism, the planker that moves both vertically, piece-holder feed mechanism, described left and right sides bearing is vertically fixed on the two ends on the lathe bed, the guide rail slide block is fixed on the bearing of the left and right sides, guide rail is fixed on the below of ram, and constitute guideway with the guide rail slide block, guide rail is arranged on the guide rail slide block, the planker that moves both vertically is fixed on the middle part of ram, and the planing tool mechanism of planing part is fixed on the planker that moves both vertically.
Described piece-holder feed mechanism has two kinds of versions, is the modular combination mode, a kind ofly is arranged on the transverse movement workbench between two bearings on the lathe bed; Another kind is arranged on the circular index motion tip mechanism on the bearing of the left and right sides.Adopt two kinds of motions can improve processing flexibility greatly respectively, enlarge the range of application of planer.
The type of drive of this patent has two kinds: the one, and hydraulic-driven, the one, numerical control drives.Adopt existing digital control system to carry out technology upgrading, and the motion by digital control computer control ram, move both vertically planker and transverse movement workbench or circular index motion tip mechanism, make machine tool structure simple, also enlarged the range of work of planer, make it not only can processing plane, can also process the inclined-plane, axially curved surface, laterally curved surface and helicoid, cylinder etc. have the complex parts of special-shaped face.Because these two kinds of type of drive all can be passed through existing techniques in realizing, so in this patent, no longer describe in detail.
The cantilever structure of existing shaping machine upper ram is designed to the two supports structure, about being about to bearing and being divided into two, be separately fixed at the two ends of lathe bed, the ram that has guide rail is across being installed on the bearing of the left and right sides.When planer head is in initiating terminal and these two positions of range, its amount of deflection minimum, even when planer head is positioned at the amount of deflection maximum position and is the centre position of guide rail span, the size of its amount of deflection is much smaller with respect to the shaping machine of same stroke.And its influence that changed by stroke is also little, and promptly the rigidity of ram is better, and the running orbit of cutter just more levels off to straight line like this, and the element precision that processes is also higher.Simultaneously, the length of ram and guide rail also can be lacked accordingly satisfying on the basis of same instructions for use, has both saved material and production cost, has reduced the volume of planer again.Its middle guide can adopt the higher rolling guide-rail pairs of kinematic accuracy, also can adopt the rail plate pair.
Another patent of described planing tool employing the applicant of mechanism, the patent No. is 200420026963.0, name is called the double-end block plane cutter mechanism, can make the existing unidirectional cutting of shaping machine, the inefficient course of work that idle running is returned becomes the efficiency operation process of two-way cutting, and working (machining) efficiency is doubled.
Operation principle of the present utility model: be fixed on part to be processed on the transverse movement workbench or circular index motion tip mechanism on.During planing, the ram that is driven by drive unit does reciprocating linear motion, and the planker that moves both vertically on the ram drives planing tool mechanism workpiece is planed.When this planer adopts digital control system to drive, the procedure that can work out in advance by digital control system, the processing to part is finished in the coordinated movement of various economic factors of control ram, vertical saddle and transverse movement workbench or circular index motion tip mechanism.Ram left and right sides linear reciprocating motion under the effect of drive unit wherein, and the planker that moves both vertically that is arranged on the ram moves up and down according to control signal and by driven by servomotor, thereby can accurately control the height and position of the planing tool mechanism that is installed on the planker, the transverse movement workbench is implemented accurate feeding according to the control signal drive workpiece of digital control system.And this transverse movement workbench is dismountable, and the vertical saddle distance that overhangs can be reduced in dismounting back or mix backing plate and increase the transverse movement workbench, improves the processing rigidity; Or revolution dividing movement tip mechanism is installed on the bearing of the left and right sides, can enlarge the radius of circular index motion tip mechanism processing parts.And, then can or directly adopt manual calibration control mode control circular index motion tip mechanism by reducing gear, servomotor for the processing revolving parts, realize processing to revolving parts or helicoid.
3, beneficial effect: the utlity model has following advantage:
1) changes the cantilevered ram into the double base ram, improved the kinematic accuracy of supporting rigidity and ram greatly, the kinematic accuracy of ram can reach 0.01/300 millimeter, be much higher than 0.04/300 millimeter of the shaping machine accuracy standard, and reduced material thus, alleviated weight, reduced cost, reduced size.
2) can adopt digital control system, enlarge planer machining shape scope.But processing plane, inclined-plane, axial or horizontal curved surface etc.
3) after having adopted circular index motion tip mechanism, can also process the complex parts of special-shaped faces such as helicoid, cylinder.
4) can adopt the double-end block plane cutter mechanism, realize two-way planing, working (machining) efficiency significantly improves, and can reduce empty wearing and tearing, prolongs the Acceptable life of planer.
5) length of guide rail and lathe bed is satisfying on the basis of same instructions for use, can lack accordingly, has both saved material and production cost, has also reduced the floor space of planer.
Five, the specific embodiment
As shown in Figure 1 and Figure 2, described in the utility model double support planer bed, it comprises lathe bed 1, left and right sides bearing 2, guide rail slide block 3, ram 4, guide rail 5, planing tool mechanism 6, the planker 7 that moves both vertically, transverse movement workbench 8, regulates the servomotor 14 of cushion block 11, tooth bar 12, reducing gear 13 and driving ram 4.Lathe bed 1 is the monoblock type lathe bed, the stability when guaranteeing planer work, bearing 2 be about two, be vertically fixed on the two ends of lathe bed 1 respectively.Guide rail slide block 3 is fixed on the two ends of left and right sides bearing 2, and its cross sectional shape is " recessed " font.Guide rail 5 is fixed on the below of ram 4.Constitute the roller guideway between guide rail 5 and the guide rail slide block 3.Adopt rolling guide-rail pairs, can improve kinematic accuracy, reduce the wearing and tearing of guide rail, increase the service life.Can certainly adopt the rail plate pair.Whole lathe is " mouth " word shape, and this structure has favorable rigidity and kinematic accuracy.By hydraulic-driven or digital control system lathe is driven and controls.Servomotor 14 is installed in a side of bearing 2, and is fixed on tooth bar 12 on the ram 4 by the gear driven on the reducing gear 13, drives ram 4 and does linear reciprocating motion.The planker 7 that moves both vertically is installed in the middle part of ram 4, and the planing tool mechanism 6 of planing part is installed on the planker 7 that moves both vertically, and it is the disclosed double-end block plane cutter mechanisms of 200420026963.0 patents that this planing tool mechanism 6 adopts the patent No., thereby working (machining) efficiency is doubled.Can certainly adopt common unidirectional planing tool mechanism.Transverse movement workbench 8 is arranged on the lathe bed 1 between left and right sides bearing 2, and can change height by regulating cushion block 11.
Described lathe also can be combined into structure as shown in Figure 3, it by be arranged on one on the bearing circular index mechanism 9 and the circular index that matches with it top 10 that is arranged on another bearing form gyroaxis, and drive by circular index servomotor 15.Design the another kind of type of drive that ram 4 adopts oil cylinder to drive among Fig. 3, can be used for not containing the manufacture field of axial curved surface.
By diaxon, the three-axis numerical control system controls described lathe, can realize processing the purpose of difformity part respectively.For example: the transverse movement workbench 8 and planker 7 usefulness the two-axis numerical control systems control that moves both vertically, and ram 4 employing oil cylinders drive, plane, inclined-plane, curved surface that can cross machine.And for example: planker 7 and 9, the 10 usefulness two-axis numerical control systems of circular index mechanism of will moving both vertically control, and ram 4 adopts oil cylinders to drive, the part of complicated special-shaped faces such as cylinder that can cross machine, curved surface.For another example: transverse movement workbench 8 and move both vertically planker 7 and ram 4 usefulness three-axis numerical control systems control, but then cross machine and axial curved surface.Circular index mechanism 9,10, move both vertically planker 7 and the control of ram 4 usefulness three-axis numerical control systems can also be processed complex parts such as helicoid again.Adopt the various combination mode, the manufacture field of planer fully can be expanded, improve lathe use value.