CN102896503B - A kind of servo center frame and using method thereof - Google Patents
A kind of servo center frame and using method thereof Download PDFInfo
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- CN102896503B CN102896503B CN201210459203.8A CN201210459203A CN102896503B CN 102896503 B CN102896503 B CN 102896503B CN 201210459203 A CN201210459203 A CN 201210459203A CN 102896503 B CN102896503 B CN 102896503B
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Abstract
The invention discloses a kind of servo center frame and using method thereof, it adopts support portion to be arranged on described support body by vertical guiding mechanism, at least be provided with for detecting the close checkout gear of knife rest on bracing frame simultaneously, decline to control described vertical guiding mechanism, and after centre frame crossed by knife rest, described vertical guiding mechanism resets; Described support portion is also furnished with the servo-actuated auxiliary support apparatus vertically led in described support portion and by described support body.Little on machine process impact when playing excellent support according to the present invention.
Description
Technical field
The present invention relates to a kind of is prevent workpiece whirling vibration and centre frame to workpiece supplemental support when being applied to processing slim axle on lathe, and invention also relates to the using method of this servo center frame.
Background technology
When the draw ratio of workpiece is excessive, himself Static stiffness and dynamic stiffness are often all not enough, add man-hour to it, if do not support middle, workpiece rotary vibration is excessive, and the lighter causes the low precision after work pieces process, surface roughness is excessive, and severe one cannot carry out normal machining.Therefore the current centre frame that generally uses is supported workpiece, produces vibration when preventing it from making it rotate because rigidity is not enough.
Existing centre frame is generally all fixed on lathe bed, although the support stiffness be fixedly installed is higher, in process, can not move left and right and the centre frame of rise and fall can not will certainly process to produce and hinder.In process, centre frame blocks the feeding of knife rest, must first processing work centre frame side when making processing work, then dismantled by centre frame, knife rest runs to opposite side, installs on lathe bed more afterwards by centre frame, support to the side that work pieces process is complete, again workpiece opposite side is processed, so just have and connect cutter, not only affect precision but also affect surface roughness.Needed for processing work, centre frame is more, and switch centre frame number of times more, machining accuracy is poorer, and efficiency is lower.
Summary of the invention
For this reason, the present invention is in order to overcome the back rest defect large to machining negative effect, and providing a kind ofly affects little servo center frame and using method thereof when playing excellent support to machine process.
The present invention is by the following technical solutions:
A kind of servo center frame, comprise support body and be arranged on the support portion on support body, described support portion is arranged on described support body by vertical guiding mechanism, at least be provided with for detecting the close checkout gear of knife rest on bracing frame simultaneously, decline to control described vertical guiding mechanism, and after centre frame crossed by knife rest, described vertical guiding mechanism resets;
Described support portion is also furnished with the servo-actuated auxiliary support apparatus vertically led in described support portion and by described support body.
According to above-mentioned servo center frame of the present invention, there is elevating function, by matching detection device, carry out SERVO CONTROL, thus, meet when knife rest does not conflict with centre frame, bracing frame supports workpiece, when knife rest and centre frame be about to produce conflict time, centre frame is descending to avoid knife rest, and therefore knife rest freely can complete corresponding manufacturing procedure, do not need to connect cutter, machining accuracy easily ensures, and does not need to dismantle centre frame frequently, and working (machining) efficiency improves greatly.On the other hand, by the supplemental support vertically led, form the supporting construction of vertically adjustment and vertical guiding, at the next braced frame of asynchronous jacking condition, ensure the integral rigidity of centre frame.
Above-mentioned servo center frame, described vertical guiding mechanism is hydraulic cylinder, and its cylinder body forms described support body or is packed on an independent support body, and its piston rod fixedly mounts described support portion.
Above-mentioned servo center frame, described auxiliary support mechanism comprises the guide frame of guide post and configuration.
Above-mentioned servo center frame, upper end and the described support portion of described guide post form revolute pair and are connected, and lower end and an adjusting nut threaded engagement, wherein this adjusting nut is vertically directed at described vertical guiding mechanism or described support body.
Above-mentioned servo center frame, is characterized in that, described guide post upper end is equipped with the rotation output link of a driving mechanism, rotates around its axis to drive guide post; Meanwhile, the described support portion the building described revolute pair axis be formed along described guide post extends and the stop collar be slidably matched with guide post.
Above-mentioned servo center frame, described driving mechanism is gear drive.
Above-mentioned servo center frame, described guide post has two and shares a set of described guide frame, and is configured in the both sides of described vertical guiding mechanism axisymmetrically.
Above-mentioned servo center frame, described checkout gear is proximity switch.
Above-mentioned servo center frame, described checkout gear is arranged on the auxiliary detection device on lathe bed under being also included in using state.
According to the using method of a kind of servo center frame of the present invention, support workpiece by vertical guiding mechanism, and the checkout gear detecting knife rest is all set on centre frame and on lathe bed; Thus, drive knife rest work to enter, when one of checkout gear sends approach signal described in two, described vertical guiding mechanism declines and puts in place, makes centre frame avoid knife rest, so checkout gear described in two send simultaneously leave signal time, described vertical guiding mechanism resets, and ensures the reliability service of equipment.
Accompanying drawing explanation
Fig. 1 cuts open structural representation according to a left side for a kind of servo center frame of the present invention, and double dot dash line part is lathe bed.
Fig. 2 is the main TV structure schematic diagram corresponding to Fig. 1.
In figure: 1, bed body 2, connecting plate 3, back-up block 4, guide post 5, gear 6, gear 7, gear 8, guide post 9, proximity switch sensor block 10, base 11, stop collar 12, hydraulic cylinder 13, piston rod 14, adjusting nut 15, limiting plate 16, regulate six sides 17, proximity switch; 18, proximity switch group 19, planker 20, knife rest.
Detailed description of the invention
Servo center frame in this paper relates to one and substantially realizes, i.e. the adjustment up and down of centre frame.
An aspect, namely detects and mating of being elevated.
A guarantee, the rigidity of centre frame after there is elevating function.
Should be appreciated that servo is originally closed loop configuration, but in many applications, as a lot of discrete parts in digital control system are all called servo component, typical component is as servomotor, and in fact it is the execution unit of servo-drive system.
See a kind of servo center frame shown in Figure of description 1, comprise support body and be arranged on the support portion on support body, described support portion is arranged on described support body by vertical guiding mechanism, at least be provided with for detecting the close checkout gear of knife rest on bracing frame simultaneously, decline to control described vertical guiding mechanism, and after centre frame crossed by knife rest, described vertical guiding mechanism resets;
Described support portion is also furnished with the servo-actuated auxiliary support apparatus vertically led in described support portion and by described support body.
Wherein, support component, supports fast 3 as shown in Figure 1, is rolling support or sliding support parts, does not have tangible difference in support component used herein and prior art, be all a kind of semi-enclosed support component, do not repeat them here.
Meanwhile, for the density of centre frame, with reference to centre frame density of the prior art, can need to select according to processing work length, be generally no less than two equally.Servo center frame proposed in this article is especially true, because departing from a period of time of workpiece between processing period containing a certain centre frame, in order to ensure machining accuracy, on original density basis, suitably can increase a centre frame, in most of the cases, the disengaging of short time supports and can not have excessive impact to machining accuracy, can select not increase.
About adjusting up and down, precision adjustment adopts screw screw mechanism, and structure comparison is compact, and as shown in Figure 1, when piston rod 13 wherein replaces with leading screw, leading screw upper end, by bearings back-up block 3, is then undertaken driving by the feed screw nut that position is fixing.
But screw screw mechanism high expensive, and need SERVO CONTROL,
Realize being adopt linkage mechanism in one, control to obtain very high positional precision by stop/dead point, and the different range of coupling can be related to by bar is long.But this kind of mechanism installation control requires larger, uses relative difficulty when installing space is limited.
A kind of compact conformation, and Adjustment precision higher scheme in position adopts fluid cylinder to control, preferably adopt hydraulic cylinder, power density is large, and impacts little.As shown in Figure 1, described vertical guiding mechanism is hydraulic cylinder 12, and its cylinder body forms described support body or is packed on an independent support body, and its piston rod 13 fixedly mounts described support portion.Digit Control Machine Tool generally has independently hydraulic system, and therefore, the use of hydraulic cylinder 12 can meet change requirement.The defect of hydraulic cylinder is may because of the Leakage of the aging generation of seal.
About installation, as Fig. 1 and 2, the installation method of a reference is that servo center frame is fixed on the interior neat son of the middle pan of a body 1.
Lifting coupling, brings into checkout gear and the control as hydraulic cylinder 12 in digital control system exactly, is controlled by PLC.One is opportunity, should not too early, otherwise can have an impact to machining accuracy, also should not too late, equipment of may therefore wounding.Those skilled in the art can select the installation site of checkout gear easily according to work speed.
For above selection, for said realization, do not adopt SERVO CONTROL, can carry out being elevated also can realizing by the screw screw mechanism such as based on handwheel, but due to the processing of slender axles long for most man-hour, the energy of manpower relatively must be concentrated and just can avoid forging a knife or damaging machine tool lead screw, and during Non-follow control, need to extend relevant control assembly, be unfavorable for the compactedness of lathe bed, still tend to SERVO CONTROL here.
A kind of situation of guarantee of the rigidity of centre frame is the rigidity of vertical guiding mechanism self, and as screw screw mechanism, himself has guide frame, can form good support stiffness.Stress herein with adopting the structure of supplemental support, the rigidity of structure more easily ensures, and due to independent design, can the structure of better matching machine tool.
Based on basic conception herein, supplemental support is servo-actuated in such as back-up block 2, for avoiding keeping in check, more simple to structural design.The further employing plural parts that parallel to the axis are rigidly connected and easily form the feature of braced frame, and to parallel as shaft forgings, it moves radially restrained, can not overturn, and integral rigidity can ensure.
Comprise the guide frame of guide post 4 and configuration about described auxiliary support mechanism, structure is simple.About guide frame, can be the guiding separately to guide post 4 self, can also be the guiding be additional on miscellaneous part, those skilled in the art can select according to concrete structure.
For the ease of system coordination, when such as guide post has branched, overall can lead, special guide frame is set, when independent pilot, can arranges as guide sleeve structure.
In the structure shown in Fig. 1 top, the upper end of described guide post 4 forms revolute pair with back-up block 3 and is connected, and lower end coordinates with an adjusting nut screw thread 14, and wherein this adjusting nut 14 is vertically directed at described vertical guiding mechanism or described support body.In using, by rotating guide post, make the partial act of threaded engagement, the length of adjustment guide post, and then adjust the stop of vertical guiding mechanism, thus can adjust for the workpiece of the different diameter of axle, and in process, if a few cutter need be cut, real-time adjustment can be carried out for the depth of cut.Therefore, the adjustment of adjusting nut 14 is preferably incorporated to servo-drive system, or the PLC of numerically controlled lathe.
So, further, described guide post 4 upper end is equipped with the rotation output link of a driving mechanism, is adjusted by power, rotates around its axis to drive guide post, this stem is now described as on adjusting nut 14, be exactly the movement producing guide post 4 axis, thus, as shown in Figure 1, the top dead centre of hydraulic cylinder 12 will receive the constraint of adjusting nut 14, the bearing height of the lucky corresponding workpiece of top dead centre here.
Further, as shown in Figure 1, the described support portion the building described revolute pair axis be formed along described guide post 4 extends and the stop collar 11 be slidably matched with guide post 4.Stop collar 11 has two effects, and its basic role is the position constraint to such as adjusting nut 14, the namely constraint of guide post 4 top dead centre; Another effect is the Static stiffness that can improve guide post 4.
Stop collar 11 can be fixed on the bed body 1 shown in Fig. 1, also can be fixed on the cylinder body of hydraulic cylinder 12, still connect on the cylinder body with bed body 1 and hydraulic cylinder 12 simultaneously, wherein, the third is chosen as best selection, such hydraulic cylinder is except the fulcrum of bottom, and obtain another fulcrum by stop collar 11 again, integral rigidity improves further.
The installation site of stop collar 11 on bed body 1 is with reference to base 10 place shown in figure 1 top.In addition, in the construction shown in fig. 1, not only because there are two guide posts 4, two stop collars 11 are set on top to the point of contact of bed body 1, even if only have a guide post 4, two tie points are also preferably set, to ensure overall connection reliability.
Described driving mechanism is gear drive, when compact conformation, easily obtains more accurate transmission.Ying Zhi, the acquisition of rotation is a kind of modal transmission way of output at mechanical field, and according to technology contents disclosed herein, those skilled in the art easily selects other the kind of drive, such as Chain conveyer, toothed belt transmission etc.
In the construction shown in fig. 1, guide post has two, adopt gear 5, gear 6 and gear 7 carry out transmission, the desirably synchronous driving of two guide posts, here be synchronously synchronization lifting.During single gear drive, needing the Steering considering guide post, is match synchronization, reduces the use of idle pulley, can consider right-and-left threaded use, to simplify structure.
And then described guide post 4 has two and shares a set of described guide frame as previously mentioned, and is configured in the both sides of described vertical guiding mechanism axisymmetrically, generation balance during adjustment, can not produce clamping stagnation.
About the preferred proximity switch of described checkout gear, operating distance meets the work speed of knife rest and the response speed of hydraulic cylinder 12.The defect of proximity switch may produce misoperation because of some reason, and therefore, when adopting proximity switch, described checkout gear is arranged on the auxiliary detection device on lathe bed under being also included in using state.The configuration mode of proximity switch as illustrated in fig. 1 and 2, in order to ensure safe and reliable operation, proximity test is, as long as there is a proximity switch action, hydraulic cylinder 12 just responds this action.And when away from detection, necessary two proximity switches all action hydraulic cylinder ability response quautity proximity switches, can ensure the reliability service of equipment accordingly.
In other examples, adopt Stroke Control, the mode of travel switch can be adopted to carry out Stroke Control, the arm of force of adjustment travel switch, the operating distance required for coupling.
Proximity switch belongs to one not contact detection, and travel switch belongs to a kind of contact detection, then in some embodiments, adopt optoelectronic switch or sonac to detect, cost is slightly high, but is not easy to be interfered.
Be applied to above-mentioned servo center frame, mate a kind of preferably servo center frame is mated in lifting in this paper, rigidity and lifting using method with detection, support workpiece by vertical guiding mechanism, and the checkout gear detecting knife rest is all set on centre frame and on lathe bed; Thus drive knife rest work to enter, when described in two, one of checkout gear sends approach signal, described vertical guiding mechanism declines and puts in place, makes centre frame avoid knife rest, so checkout gear described in two send simultaneously leave signal time, described vertical guiding mechanism resets.
When used checkout gear misoperation rate is very low, an independent checkout gear can be adopted to detect, the logic of no longer carrying out many checkout gears in the methods described above coordinates.
Claims (4)
1. a servo center frame, comprise support body and be arranged on the support portion on support body, it is characterized in that, described support portion is arranged on described support body by vertical guiding mechanism, at least be provided with for detecting the close checkout gear of knife rest on support portion simultaneously, decline to control described vertical guiding mechanism, and after centre frame crossed by knife rest, described vertical guiding mechanism resets;
Described support portion is also furnished with the servo-actuated auxiliary support apparatus vertically led in described support portion and by described support body;
Described vertical guiding mechanism is hydraulic cylinder, and its cylinder body forms described support body or is packed on an independent support body, and its piston rod fixedly mounts described support portion;
Described auxiliary support apparatus comprises the guide frame of guide post and configuration;
Upper end and the described support portion of described guide post form revolute pair and are connected, and lower end and an adjusting nut threaded engagement, wherein this adjusting nut is vertically directed at described vertical guiding mechanism or described support body;
Described guide post upper end is equipped with the rotation output link of a driving mechanism, rotates around its axis to drive guide post; Meanwhile, the described support portion the building described revolute pair axis be formed along described guide post extends and the stop collar be slidably matched with guide post;
Described driving mechanism is gear drive.
2. servo center frame according to claim 1, is characterized in that, described guide post has two and shares a set of described guide frame, and is configured in the both sides of described vertical guiding mechanism axisymmetrically.
3. servo center frame according to claim 1, is characterized in that, described checkout gear is proximity switch.
4. servo center frame according to claim 1, is characterized in that, described checkout gear is arranged on the auxiliary detection device on lathe bed under being also included in using state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210459203.8A CN102896503B (en) | 2012-11-15 | 2012-11-15 | A kind of servo center frame and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210459203.8A CN102896503B (en) | 2012-11-15 | 2012-11-15 | A kind of servo center frame and using method thereof |
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| CN102896503A CN102896503A (en) | 2013-01-30 |
| CN102896503B true CN102896503B (en) | 2015-09-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5517886A (en) * | 1994-05-03 | 1996-05-21 | Dainichi Kinzoku Kogyo Co., Ltd. | Centering device having work rest control responsive to carriage detection means |
| CN101462233A (en) * | 2007-12-21 | 2009-06-24 | 威海华东数控股份有限公司 | Machine tool horizontal lead screw oil lift device |
| CN202378256U (en) * | 2011-11-25 | 2012-08-15 | 佛山市宝捷精密机械有限公司 | Guide pillar positioning structure of injection molding machine |
| CN202922217U (en) * | 2012-11-15 | 2013-05-08 | 山东普利森集团有限公司 | Servo center frame |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10180658A (en) * | 1996-12-20 | 1998-07-07 | Shibaura Eng Works Co Ltd | Linear moving type robot |
| EP2163341B1 (en) * | 2008-09-12 | 2019-07-10 | Jtekt Corporation | Machine tool with rest apparatus and machining method thereof |
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- 2012-11-15 CN CN201210459203.8A patent/CN102896503B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5517886A (en) * | 1994-05-03 | 1996-05-21 | Dainichi Kinzoku Kogyo Co., Ltd. | Centering device having work rest control responsive to carriage detection means |
| CN101462233A (en) * | 2007-12-21 | 2009-06-24 | 威海华东数控股份有限公司 | Machine tool horizontal lead screw oil lift device |
| CN202378256U (en) * | 2011-11-25 | 2012-08-15 | 佛山市宝捷精密机械有限公司 | Guide pillar positioning structure of injection molding machine |
| CN202922217U (en) * | 2012-11-15 | 2013-05-08 | 山东普利森集团有限公司 | Servo center frame |
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