CN1151922A - Numerically controlled cam shaft milling machine - Google Patents
Numerically controlled cam shaft milling machine Download PDFInfo
- Publication number
- CN1151922A CN1151922A CN 95119372 CN95119372A CN1151922A CN 1151922 A CN1151922 A CN 1151922A CN 95119372 CN95119372 CN 95119372 CN 95119372 A CN95119372 A CN 95119372A CN 1151922 A CN1151922 A CN 1151922A
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- milling machine
- saddle
- main shaft
- hydraulic pressure
- headstock
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Abstract
The cam shaft milling machine comprising numerical controller, body, headstock and carriage is driven by three step motors for main shaft, carriage and tool carrier separately. The profile of cam shaft is formed by the main shaft and tool carrier linkage. The gearing chain in headstock is a gap-adjustable worm gear pair. There is a supplementary hydraulic workpiece supportor at the middle part. The present invention can perform the rough and semi-finishing machining of various cam shafts.
Description
The present invention relates to a kind of lathe that is exclusively used in the processing engine cam.
In the prior art, rough machining method to the engine cam cam profile shape roughly has two kinds: a kind of is to adopt camsahft coping lathe turning processing, and this device structure complexity, efficient is low, energy consumption is high, volume is big, low precision, and needs often replacing pattern, adjust time-consuming, after the technology.Another kind is to adopt numerically control grinder to carry out high-rate grinding, and this processing method requires height to the blank size precision of workpiece, and the equipment price costliness, increases production cost.
The purpose of this invention is to provide a kind of dependence lathe general numerical control system and carry out numerical control control, do not need pattern, and simple in structure, volume is little, efficient is high, can carry out roughing or semi-finished CNC-camshaft milling machine of the cam of camshaft profile of all kinds and shape.
The present invention is a basic part with the body of lathe bed on the basis of lathe, still keeps three big parts such as headstock, tailstock, planker, by three stepper motors difference drive shaft, planker and knife rests.The building motion of cam profile shape is produced by main shaft (Z axle) and knife rest (X-axis) interlock.Each cam processing is finished by saddle (Y-axis) lengthwise movement on the axle.Because the cam profile shape of camshaft is an irregular curve, the cam profile shape of various dissimilar engines all has different tracks, and can't realize its track digitlization continuous control in the universal numerical control system.If develop special-purpose numerical control system, its great limitation system is arranged but: because the difference of various cam faces, special-purpose numerical control system is only effective to designed a certain camshaft, an a kind of camshaft part of the only fixing processing of equipment, and obviously practical value is little.The present invention adopts the interrupted straight line of general numerical control system to tear open and mends the control method, according to the cam lift track, be divided into the plurality of sections curve, every section curve replaces with spiral of Archimedes is approximate, this plurality of sections helix is coupled together, just form a theoretical lifting curve of approximate cam.
At bent wheel shaft part thin and grow, the characteristics of poor, the easy generation of the cutting flutter of shape just, and the end mill that the present invention adopts almost is to work under interrupted cut, the gap of driving-chain is the flutter of influence cutting directly, so headstock driving-chain of the present invention is made up of the worm gear of a pair of adjustable gaps.For avoiding the flutter district of stepper motor, machine tool transmission system has been taked the reduction of speed transmission, has set up reducing gear in the driving-chain of Z axle and X-axis.The gearratio of main shaft, knife rest, saddle is respectively iz=1/40, ix=2/15, iy=3/5.For improving the processing rigidity of camshaft, set up workpiece hydraulic pressure auxiliary support apparatus at the medium position of processed camshaft.This device adopts two pairs or more hydraulic pressure constant force adjustable supports structure, and each support cylinder piston area is identical, and oil circuit communicates, and each piston pressure equates, so the power of each strong point is impartial and adjustable.
Automaticity height of the present invention does not need pattern, and is easy to adjust, highly versatile, with existing camsahft coping lathe relatively, have that volume is little, in light weight, power consumption is low, efficient is high, precision good, an advantage such as simple in structure, dependable performance.Its technical-economic index is compared as follows:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is a headstock worm gear structural representation of the present invention;
Fig. 4 is clamping workpiece of the present invention and aiding support hydraulic circuit schematic diagram.
The present invention is made of numerical control device 14, lathe bed 1, cabinet base 2, headstock 3, saddle 6, middle carriage 5 etc.Milling head 4 is fixed on the middle carriage 5, is driven by a stepper motor and does laterally (X-axis) motion.Middle carriage 5 is contained on the saddle 6, and saddle 6 is driven by another stepper motor and does vertically (Y-axis) motion, and milling cutter is driven around self axis by alternating current generator and rotates.The headstock driving-chain is made of a pair of worm gear 10,11, and when worm gear was gapped slightly, the off-centre that need only adjust splicing sleeve 12 got final product.Main shaft is driven by the 3rd stepper motor and rotates.Saddle 6 adopts tilting structure, can improve its rigidity like this, is convenient to chip removal again, and is vertically increasing guiding length.Guide pass makes motion more become steady through laminating processing.Middle carriage is more much bigger than general lathe on width, length, thereby has increased cutting stability.The milling head main shaft is directly by the V belt transmission, to reduce vibration and noise.Milling cutter directly is contained in the taper hole of milling head main shaft with No. 4 taper shanks of Mohs, and by drawing the pole anchorage.Adding the flexural deformation in man-hour for reducing camshaft 9, be provided with many hydraulic pressure constant force adjustable supports 8 at the medium position of processed camshaft.And by the pressure switch in the hydraulic system, making each supporting force be transferred to camshaft only has till the micro-deformation after stressed.The clamping of workpiece camshaft adopts hydraulic pressure to clamp automatically and unclamps.When the need clamping work pieces, hydraulic pressure reversing solenoid valve DT
1Must be electric, the top of main shaft chuck 13, tailstock 7 locked workpiece 9 and hold out against respectively.After hydraulic pressure raises, pressure switch YJ
1Make DT
1Dead electricity, DT
3Must be electric, supplemental support 8 is moved and workpiece is propped up tightly.The big I of its supporting force is by YJ
2Regulate.After pressure is long, pressure switch YJ
2Make DT
3Dead electricity, at this moment, workpiece clamps supporting and finishes.When need unclamp workpiece, hydraulic pressure reversing solenoid valve DT
2, DT
4Simultaneously electric, main shaft chuck, tailstock center, supplemental support is unclamped simultaneously, and pressure switch YJ
3Hydraulic pressure constantly raise, when hydraulic pressure is raised to certain value, YJ
3Make DT
2, DT
4Dead electricity, workpiece are unclamped program and are finished.
Claims (4)
1. CNC-camshaft milling machine that constitutes by numerical control device, headstock (3), tailstock (7), planker etc., it is characterized in that main shaft, middle carriage (5), saddle (6) drive with three stepper motors respectively, milling head (4) is fixed on the middle carriage (5), middle carriage (5) is contained on the saddle (6), the headstock driving-chain adopts the worm gear (10,12) of a pair of adjustable gaps to form, and is provided with hydraulic pressure auxiliary support apparatus (8) at the medium position of workpiece to be machined.
2, milling machine according to claim 1 is characterized in that saddle (6) adopts tilting structure, is vertically increasing guiding length, the laminating processing of guide pass, and the milling head main shaft is directly by the V belt transmission.
3, milling machine according to claim 1 and 2 is characterized in that hydraulic pressure auxiliary support apparatus (8) adopts two pairs or more hydraulic pressure constant force adjustable supports structure, and each support cylinder area equates that oil circuit communicates.
4, milling machine according to claim 3 is characterized in that the gearratio (iz) of main shaft is 1/40, and the gearratio of knife rest (ix) is 2/15, and the gearratio of saddle (iy) is 3/5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95119372 CN1151922A (en) | 1995-12-12 | 1995-12-12 | Numerically controlled cam shaft milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95119372 CN1151922A (en) | 1995-12-12 | 1995-12-12 | Numerically controlled cam shaft milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1151922A true CN1151922A (en) | 1997-06-18 |
Family
ID=5081977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95119372 Pending CN1151922A (en) | 1995-12-12 | 1995-12-12 | Numerically controlled cam shaft milling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111816A (en) * | 2013-02-28 | 2013-05-22 | 重庆望江工业有限公司 | Tri-edge shaft machining method |
-
1995
- 1995-12-12 CN CN 95119372 patent/CN1151922A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111816A (en) * | 2013-02-28 | 2013-05-22 | 重庆望江工业有限公司 | Tri-edge shaft machining method |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |