A kind of right-angle milling head of compensating coaxial degree error
Technical field
The present invention relates to metal milling machine and cutting-tool engineering field thereof, be specifically related to a kind of right-angle milling head of compensating coaxial degree error.
Background technology
Right-angle milling head is to adopt intermeshing a pair of bevel gear group the vertical axis perpendicular to table top to be converted to a kind of lathe annex of the trunnion axis that is parallel to table top.Chinese patent literature (publication number CN 101100035A) discloses a kind of " bevel-gear right-angle milling head ", and it is converted into horizontally rotating of milling head by a pair of axle and a pair of bevel gear with the vertical rotation of main shaft of numerical control machine tool, carries out machined; But it is when installing right-angle milling head, and there are coaxiality error in milling head vertical axis and machine tool chief axis, and this error can make bearing bear extra radial load, and the right-angle milling head life-span is declined to a great extent.It is directly to rely on the key piece to come transmitting torque that kind of a method is arranged at present, but the Disalignment of key piece can produce radial load equally, and this can make the key piece sharply wear and tear and lose the pulling force of main spindle broach, produces axial displacement, and practical effect is not good.
The problems such as therefore, there is the coaxiality error of rotating shaft and machine tool chief axis in right-angle milling head of the prior art, causes the poor working environment of the elements such as bearing, key, causes transmission unstable, and service life of equipment is short, and working (machining) efficiency is low.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of right-angle milling head of compensating coaxial degree error is provided, its coaxiality error that produces in installation process is reduced or make its disappearance, a preferably working environment is provided for the elements such as bearing, key, make the right-angle milling head transmission stable, prolong service life, and working (machining) efficiency improves.
To achieve these goals, the technical scheme taked of the present invention is:
A kind of right-angle milling head of compensating coaxial degree error, comprise housing, vertical axis, bevel gear group and trunnion axis, described vertical axis meets at right angles with described trunnion axis by described bevel gear group and is connected, described vertical axis and described trunnion axis are installed in the described housing by bearing is rotatable, it is characterized in that, described vertical axis comprises vertical axis and lower vertical axis, also comprise a yielding coupling, described yielding coupling comprises the first half and Lower Half, be connected by elastomer between the described first half and the Lower Half, and keep certain gap, and the described first half is fixedly connected with upper vertical axis, and described Lower Half is fixedly connected with lower vertical axis.
Further, the centre of described yielding coupling Lower Half has through hole, is convex moulding or the recessed edge of semicircle in the lower end of described yielding coupling Lower Half, and the Lower Half of described yielding coupling and lower vertical axis junction form a cavity; A pulling-on piece is installed in described cavity, and described pulling-on piece is provided with the recessed edge of corresponding semicircle or convex moulding, and the through hole that described pulling-on piece passes described shaft coupling Lower Half by a screw is fixed on the described upper vertical axis.
Further, described yielding coupling Lower Half is provided with circular bosses, the installation that matches with the outer surface of described lower vertical axis end of the inner surface of described circular bosses.
Further, described housing is provided with reinforcement.
The good effect of the right-angle milling head of a kind of compensating coaxial degree of the present invention error is:
(1) by at right-angle milling head yielding coupling being set, it is minimum that the coaxiality error of vertical axis is dropped to, and the radial load of bearing is reduced or disappears, and increases the service life, and improves working (machining) efficiency;
(2) axial displacement so that the pulling force of machine tool chief axis broaching tool is utilized, has been eliminated in the semicircular ring joint that the concavo-convex edge of semicircle that arranges by Lower Half on the yielding coupling forms.
Description of drawings
Accompanying drawing 1 is the assembly structure schematic diagram of the right-angle milling head of a kind of compensating coaxial degree of the present invention error;
Accompanying drawing 2 is structure enlarged diagrams of the yielding coupling shown in the accompanying drawing 1;
Accompanying drawing 3 is perspective view of the yielding coupling Lower Half shown in the accompanying drawing 2;
Accompanying drawing 4 is the perspective view with the supporting pulling-on piece of the yielding coupling Lower Half shown in the accompanying drawing 3;
Accompanying drawing 5 is perspective view of the upper vertical axis shown in the accompanying drawing 1.
Label in the accompanying drawing is respectively:
1. mainshaft broaching tool gear; 2. quenching steel ball; 3. blind rivet;
4. machine tool chief axis; 5. go up vertical axis; 6. lock-screw;
7. flat key; 8. chassis; 9. the shaft coupling first half;
10. vertical axis shell; 11. straight pin; 12. fillister head screw;
13. shaft coupling Lower Half; 14. pulling-on piece; 15. frictional disk;
16. screw; 17. lower vertical axis; 18. stiff end fluted disc;
19. round end fluted disc; 20. flange ring; 21. bearing block;
22.SF Nonlubricated bearing; 23. dial; 24.T shape groove bolt;
25. trunnion axis housing; 26. trunnion axis; 27. handle of a knife;
28. ring flange; 29. ball bearing; 30. adjust circle;
31. trunnion axis bevel gear; 32. adjust circle; 33. clamp nut;
34. disc; 35. two-row ball bearing; 36. circlip for shaft;
37. sealing ring; 38. flange; 39. vertical axis bevel gear;
40. quick change dish; 41. ball bearing; 42. circular bosses;
43. convex moulding; 44. the recessed edge of semicircle.
The specific embodiment
Elaborate below in conjunction with the specific embodiment of accompanying drawing to the right-angle milling head of a kind of compensating coaxial degree of the present invention error.
Referring to accompanying drawing 1, a kind of right-angle milling head of compensating coaxial degree error, comprise housing, vertical axis, bevel gear group and trunnion axis 26, described vertical axis meets at right angles with described trunnion axis 26 by described bevel gear group and is connected, described vertical axis and described trunnion axis 26 are installed in the described housing by bearing is rotatable, and described vertical axis comprises vertical axis 5, lower vertical axis 17 and a yielding coupling.Described yielding coupling comprises the shaft coupling first half 9 and shaft coupling Lower Half 13, keeps up and down certain gap between two ones, and described upper vertical axis 5 is by described yielding coupling and described lower 17 coaxial connections of vertical axis.The coaxiality error that machine tool chief axis 4 passes to vertical axis 5 is compensated by yielding coupling; Yielding coupling can be yielding coupling commonly known in the art, is used for compensating coaxial degree error.
Owing to cause disalignment between machine tool chief axis 4 and the vertical axis during assembling of right-angle milling head and lathe, so that the axle that the generation radial load is loaded into right-angle milling head when right-angle milling head is worked gets on element, axle is in the abominable working environment with element key, bearing etc.In enforcement of the present invention, vertical axis is divided into upper vertical axis 5 and lower vertical axis 17, upper vertical axis 5 is used for connecting lower vertical axis 17 and machine tool chief axis 4, like this, just can increase a yielding coupling between upper vertical axis 5 and lower vertical axis 17 and be addressed the above problem.Described yielding coupling can make the radial load that produces because of coaxiality error between machine tool chief axis 4 and the vertical axis be compensated, and has improved the working environment of axle with element.
Referring to accompanying drawing 2, after having solved the radial load that causes because of coaxiality error, machine tool chief axis 4, upper vertical axis 5, can produce axial displacement on shaft coupling and the lower vertical axis 17 formed axis, the axial displacement meeting affects the machining accuracy of right-angle milling head, in order to solve simultaneously the axial displacement of coaxiality error and yielding coupling, in order to utilize the pulling force of machine tool chief axis broaching tool 1, the present invention improves yielding coupling: use a yielding coupling to connect lower vertical axis 17 and upper vertical axis 5 and machine tool chief axis 4, cooperate a cover by pulling-on piece 14(referring to accompanying drawing 4) and the semicircular ring joint that forms of screw 16 come compensating coaxial degree error, utilize the pulling force of machine tool chief axis broaching tool, eliminate axial displacement.Arrange one by the through hole of its axis in shaft coupling Lower Half 13, a recessed edge of semicircle or convex moulding 43 are formed at the bottom in described shaft coupling Lower Half 13, the shaft coupling first half 9 and shaft coupling Lower Half 13 couple together by elastomer, described shaft coupling Lower Half 13 and lower vertical axis 17 coaxial being fixedly connected with, the described shaft coupling first half 9 and upper vertical axis 5 coaxial being fixedly connected with.The right-angle milling head of a kind of compensating coaxial degree of the present invention error also comprises a pulling-on piece 14, described pulling-on piece 14 is provided with convex moulding or the semicircle recessed edge 44 corresponding with the recessed edge of semicircle of described shaft coupling Lower Half 13 bottoms or convex moulding 43, described pulling-on piece 14 by a through hole that passes described shaft coupling Lower Half 13 with screw 16 coaxial being fixed on the described upper vertical axis 5.
Accompanying drawing 3 is the shaft coupling Lower Halves 13 after improving, and also sets up a convex moulding in its underpart.The shaft coupling first half 9 cooperatively interacts with upper vertical axis 5, by flat key 7 transmitting torques.Yielding coupling in the axial direction can displacement, has increased screw 16 here, and the screw of optional M24 * 1.5 passes pulling-on piece 14(referring to accompanying drawing 4) and shaft coupling Lower Half 13 in through hole screw in upper vertical axis 5(referring to accompanying drawing 5).So both limited the axial displacement of the shaft coupling first half 9 and lower vertical axis 17, the binding face by two semicircles has guaranteed also that upper vertical axis 5 can swing within the specific limits, has compensated coaxiality error.Will maintain certain gap in the shaft coupling first half 9 and the shaft coupling Lower Half 13, be used to provide the space and swing, in actual conditions, this swing is very little concerning flexible member, can not affect the life-span of shaft coupling.
Further, in the yielding coupling Lower Half one circular bosses 42 is set, the installation that matches with the outer surface of lower vertical axis 17 ends of the inner surface of circular bosses 42.Because also can there be coaxial error in the installation that cooperates between yielding coupling and the lower vertical axis 17, so in shaft coupling Lower Half 13 circular bosses 42 is set, the installation of circular bosses 42 can guarantee that the axiality of yielding coupling and lower vertical axis 17 is within the error range of a less.
Further, can reinforcement be set at shell, make the rigidity of right-angle milling head integral body that significantly rising be arranged.
The course of work of the right-angle milling head of a kind of compensating coaxial error of the present invention is, machine tool chief axis 4 is by keyway (referring to the accompanying drawing 5) transmitting torque on the upper vertical axis 5, then pass to the shaft coupling first half 9 and shaft coupling Lower Half 13 by upper vertical axis 5 by flat key 7, pass to lower vertical axis 17 by the shaft coupling first half 9 and shaft coupling Lower Half 13 again, then pass to vertical axis bevel gear 39, pass to again trunnion axis bevel gear 31, then pass to trunnion axis 26, driven by trunnion axis 26 at last and be contained in the milling head rotation of replacing handle of a knife 27 positions, thereby realize that right-angle milling head is to the processing on the part vertical plane.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.