CN202894804U - Fixture for numerical control milling of crankshaft key grooves - Google Patents
Fixture for numerical control milling of crankshaft key grooves Download PDFInfo
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- CN202894804U CN202894804U CN 201220578436 CN201220578436U CN202894804U CN 202894804 U CN202894804 U CN 202894804U CN 201220578436 CN201220578436 CN 201220578436 CN 201220578436 U CN201220578436 U CN 201220578436U CN 202894804 U CN202894804 U CN 202894804U
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- bearing holder
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- housing
- thrust ball
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Abstract
A fixture for numerical control milling of crankshaft key grooves is used for a numerical control machine to machine the key grooves. A milling cutter is clamped on a vertical milling head spindle bearing seat, the upper end face of a flange connecting sleeve is compressed on a vertical milling head machine body in a gapless manner, the flange connecting sleeve is welded on a fixing support, a centre fixing plate of a fixing device at the lower end of the milling cutter is connected with the fixing support, a bearing sleeve is mounted inside the centre fixing plate, a thrust ball bearing is mounted at the upper end of the bearing sleeve, an inner hole on the upper portion of the trust ball bearing is close fit with a centre, the lower end face of the thrust ball bearing is pressed on a bearing sleeve shoulder, an inner hole on the lower portion of the thrust ball bearing is in clearance fit with the centre, and a top circle of the lower portion of the thrust ball bearing is matched with an inner hole of the bearing sleeve. A needle bearing is mounted inside the bearing sleeve, a top circle of a small step of a push plate is in clearance fit with an inner circle of the bearing sleeve, the end face of the push plate is compressed with the bearing sleeve, a bolt guide plate is fixed on the centre fixing plate, a hexagon socket cylindrical screw is screwed in the bolt guide plate, and a leather ring is mounted on the centre. The fixture is high in machining accuracy and efficiency, stable in machining quality, low in production cost and labor intensity and good in production environment and machining flexibility.
Description
Technical field
The utility model relates to machinery manufacturing technology field, is a kind of fixture for milling that adopts Digit Control Machine Tool that crankshaft key slot is processed specifically.
Background technology
The milling of engine crankshaft key slot is the key project in the Crankshaft Machining process, for the specification requirement very complex of keyway and strict.Adopt the new technology of Digit Control Machine Tool machining crankshafts keyway also in the same industry, not occur.At present, most domestic Production of Crankshaft producer still adopts normal horizontal miller machining crankshafts keyway, but has following defective.
1, adopts the plain-milling machine machining accuracy to be difficult to guarantee that crudy is unstable, be not suitable for the processing of the Woodruff key slots and keyways of batch, many kinds bent axle, bad adaptability.
2, production efficiency is low, and labour intensity is large, and productive temp is slow.
3, need to adjust the depth of cut before machining crankshafts, the moving adjustment of armrest guarantees keyway position degree and symmetry fully at every turn, adjusts loaded down with trivial detailsly, and equipment self guarantees ability, and for the keyway deep processing, needs the increase limit switch.
4, kerosene, the unshielded cover of iron filings are isolated, the lathe surrounding environment is produced pollute, production environment is relatively poor.
Summary of the invention
For overcoming existing plain-milling machine to the deficiency in the crankshaft key slot processing technology, goal of the invention of the present utility model is to provide a kind of numerical control milling crankshaft key slot anchor clamps, the purpose of, high accuracy machining crankshafts keyway convenient and swift to realize.
For achieving the above object, milling cutter of the present utility model jump ring, collet clamping are on the end mill head spindle bearing holder, endoporus and the end mill head spindle bearing holder cylindrical interference fits of the flange adapter sleeve of milling cutter upper end, flange adapter sleeve upper surface is pressed on the end mill head lathe bed with the screw gapless through the spindle bearing holder mounting flange, and the flange adapter sleeve is welded on the fixed support; The lower end of milling cutter is top fixture, the top fixed head of described fixture is connected with fixed support by hexagon socket head cap screw, in the top fixed head bearing holder (housing, cover) is housed, thrust ball bearing is equipped with in the upper end of bearing holder (housing, cover), the endoporus on thrust ball bearing top and top tight fit, the lower surface is pressed on the shoulder of bearing holder (housing, cover), the endoporus of thrust ball bearing bottom and top matched in clearance, and the cylindrical of thrust ball bearing cooperates with the endoporus of bearing holder (housing, cover); Two needle bearings are housed, the cylindrical of needle bearing and bearing holder (housing, cover) tight fit, needle roller and top matched in clearance in the bearing holder (housing, cover); Push pedal small stair cylindrical and bearing holder (housing, cover) inner circle matched in clearance, push pedal end face and bearing holder (housing, cover) compress, and the bolt guide plate is fixed on the top fixed head, and interior hexagonal cylindrical bolt screws in the bolt guide plate, and hex nut is locked on the interior hexagonal cylindrical bolt; Apron is housed on top.
The utility model compared with prior art has the following advantages.
1, machining accuracy is high, crudy is stable, production cost is low: cutter and the minimum amount of movement of workbench (pulse equivalency) of Digit Control Machine Tool control can generally reach 0.0001mm, but and backlass and the Error of leadscrew pitch of digital control system auto-compensation feeding driving-chain, make Digit Control Machine Tool reach very high machining accuracy; In addition, the accuracy of manufacture of Digit Control Machine Tool is high, and its automatic processing mode has been avoided the producer's manual operation error, and is therefore good with the dimensional uniformity of a collection of workpiece, and product percent of pass is high, and crudy is stable, has reduced percent defective, saves direct operating cost.
2, production efficiency is high: the structure of numerically controlled machine-tool good rigidly, allow to carry out the high-rate cutting of large cutting data, larger than machine tool from the excursion of the speed of mainshaft and the amount of feeding, therefore adding the optional optimized cutting consumption of using in man-hour, improve the stock-removing efficiency of Digit Control Machine Tool, saved the time kept in reserve; And when Digit Control Machine Tool can be saved the router, reduce adjustment, processing and Check-Out Time.Compare with machine tool, the production efficiency of Digit Control Machine Tool can improve 2-3 times.
3, productive temp is high: the Digit Control Machine Tool automaticity is high, can greatly alleviate workman's labour intensity, reduces operational personnel, is conducive to simultaneously modern management, can be to more senior manufacturing system development.
4, production environment is good: Digit Control Machine Tool is adding man-hour, and protective cover is closed, and chip removal and oil drain passage are arranged, and can not pollute the lathe surrounding environment.
5, processing as flexible: when product changes, only need to change anchor clamps and cutter, adjust and work out new procedure and get final product.
6, labour intensity is low: when the bent axle feeding, discharge, lathe moves to Digit Control Machine Tool in front of the door with bent axle automatically by programming, and only needs Push switch, and the lathe self-return is to processing stations and process, and gets back to again the lathe doorway of being convenient to loading and unloading after the end and locates.
Description of drawings
Fig. 1 structure diagram of the present utility model.
Fig. 2 is the milling cutter of Fig. 1 and the enlarged drawing of top fixture.
The specific embodiment
As shown in Figure 1 and Figure 2, milling cutter 5 usefulness jump rings 17, collet 18 clampings are on end mill head spindle bearing holder 4, the endoporus of the flange adapter sleeve 20 of milling cutter 5 upper ends and numerical control vertical milling head spindle bearing holder 4 cylindrical interference fits, can play the effect of pin-and-hole location, guarantee the coaxial accuracy of anchor clamps central axis and end mill head main shaft; Flange adapter sleeve 20 upper surfaces are pressed on the end mill head lathe bed 1 through spindle bearing holder mounting flange 3 usefulness screws one 2 gaplesss, flange adapter sleeve 20 is welded on the fixed support 19, guaranteed the fastness that milling cutter is installed, and guaranteed that fixed support 19 is in the positive back of numerical control vertical milling machine table; Milling cutter 5 is according to the needs of Crankshaft Machining, be designed to special-purpose milling cutter, guarantee when keyseat, not interfere with the crankshaft key slot axle journal, milling cutter 5 has Step Shaft to position with jump ring 17 clamping the time, guarantees when top 6 hold out against, axially can be spacing, do not need to change the axial location of milling cutter 5 after milling cutter 5 is installed, guarantee that each tool changing can overlap with the tool changing front position, jump ring 17 adopts the collet 18 of standard to carry out clamping.
The lower end of milling cutter 5 is top 6 fixture, the top fixed head 15 of described fixture is connected with fixed support 19 by hexagon socket head cap screw, in the top fixed head 15 bearing holder (housing, cover) 14 is housed, thrust ball bearing 7 is equipped with in the upper end of bearing holder (housing, cover) 14, the endoporus on thrust ball bearing 7 tops and top 6 tight fits, thrust ball bearing 7 tops can be rotated with top 6 rotation, the lower surface is pressed on the shoulder of bearing holder (housing, cover) 14, the endoporus of thrust ball bearing 7 bottoms and top 6 matched in clearance, thrust ball bearing 7 bottoms maintain static when top 6 rotate, the cylindrical of thrust ball bearing 7 bottoms and bearing holder (housing, cover) 14 endoporus matched in clearance or tight fit all can, top 6 when rotating and bearing holder (housing, cover) 14 can not interfere; In order to guarantee top 6 installation accuracy, two needle bearings 8 are housed in the bearing holder (housing, cover) 14, the cylindrical of needle bearing 8 and bearing holder (housing, cover) 14 tight fits, needle roller and top 6 matched in clearance can guarantee simultaneously that so top 6 freely rotate and installation accuracy; Push pedal 9 small stair cylindricals and bearing holder (housing, cover) 14 inner circle matched in clearance, push pedal 9 end faces and bearing holder (housing, cover) 14 usefulness screws 2 10 compress, bolt guide plate 13 is fixed on the top fixed head 15, interior hexagonal cylindrical bolt 11 screws in bolt guide plate 13, when push pedal 9 is promoted by interior hexagonal cylindrical bolt 11,9 push shaft bearing sleeves 14 of push pedal, not ejection point 6, more can not promote top fixed head 15, in top 6 situations about having held out against, with hex nut 12 lockings, when bearing holder (housing, cover) 14 moves up, promote thrust ball bearing 7 and make top 6 axial compression milling cutters 5, guarantee in milling cutter 5 process, to be unlikely to be shaken to fluff; Apron 16 is housed on top 6, and cover apron 16 quite plays a part protective cover on top 6, can protect top 6, inner to prevent that in the process of keyseat iron filings have entered bearing, affect top 6 normal rotation and top 6 installation accuracies.
When adopting Digit Control Machine Tool that crankshaft key slot is added man-hour, only need to withstand milling cutter 5 with top 6 on the fixture and get final product.
Claims (2)
1. numerical control milling crankshaft key slot anchor clamps, it is characterized in that: milling cutter (5) jump ring (17), collet (18) clamping are on end mill head spindle bearing holder (4), endoporus and end mill head spindle bearing holder (4) the cylindrical interference fits of the flange adapter sleeve (20) of milling cutter (5) upper end, flange adapter sleeve (20) upper surface is pressed on the end mill head lathe bed (1) with screw (2) gapless through spindle bearing holder mounting flange (3), and flange adapter sleeve (20) is welded on the fixed support (19); The lower end of milling cutter (5) is the fixture of top (6), the top fixed head (15) of described fixture is connected with fixed support (19) by hexagon socket head cap screw, bearing holder (housing, cover) (14) is housed in the top fixed head (15), thrust ball bearing (7) is equipped with in the upper end of bearing holder (housing, cover) (14), the endoporus on thrust ball bearing (7) top and top (6) tight fit, the lower surface is pressed on the shoulder of bearing holder (housing, cover) (14), the endoporus of thrust ball bearing (7) bottom and top (6) matched in clearance, the cylindrical of thrust ball bearing (7) cooperates with bearing holder (housing, cover) (14) endoporus; Two needle bearings (8) are housed, the cylindrical of needle bearing (8) and bearing holder (housing, cover) (14) tight fit, needle roller and top (6) matched in clearance in the bearing holder (housing, cover) (14); Push pedal (9) small stair cylindrical and bearing holder (housing, cover) (14) inner circle matched in clearance, push pedal (9) end face and bearing holder (housing, cover) (14) compress, bolt guide plate (13) is fixed on the top fixed head (15), interior hexagonal cylindrical bolt (11) screws in bolt guide plate (13), and hex nut (12) is locked on the interior hexagonal cylindrical bolt (11).
2. numerical control milling crankshaft key slot anchor clamps according to claim 1 is characterized in that: apron (16) is housed on top (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220578436 CN202894804U (en) | 2012-11-06 | 2012-11-06 | Fixture for numerical control milling of crankshaft key grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220578436 CN202894804U (en) | 2012-11-06 | 2012-11-06 | Fixture for numerical control milling of crankshaft key grooves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202894804U true CN202894804U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220578436 Expired - Fee Related CN202894804U (en) | 2012-11-06 | 2012-11-06 | Fixture for numerical control milling of crankshaft key grooves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202894804U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801945A (en) * | 2012-11-06 | 2014-05-21 | 襄樊福达东康曲轴有限公司 | Clamp for milling crankshaft keyway in numerical control mode |
-
2012
- 2012-11-06 CN CN 201220578436 patent/CN202894804U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801945A (en) * | 2012-11-06 | 2014-05-21 | 襄樊福达东康曲轴有限公司 | Clamp for milling crankshaft keyway in numerical control mode |
| CN103801945B (en) * | 2012-11-06 | 2016-05-04 | 襄阳福达东康曲轴有限公司 | Numerical control milling crankshaft key slot fixture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20151106 |
|
| EXPY | Termination of patent right or utility model |