JP2575526Y2 - Combined processing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined machining apparatus for performing primary machining and secondary machining on a work.

[0002]

2. Description of the Related Art Conventionally, as this kind of combined machining apparatus,
For example, the one disclosed by the present applicant in Japanese Patent Publication No. Sho 60-52883 is known.

[0003] In this combined machining apparatus, a cylindrical first spindle shaft whose outer peripheral portion is rotatably supported by a housing, a second spindle shaft concentrically inserted into the first spindle shaft, and And a processing head concentrically connected to the second spindle shaft.

[0004] The housing is provided on the frame via a slide base which supports the first spindle shaft with its axis line extending in the vertical direction and is movable in the vertical direction by a cylinder. This allows the housing and the first spindle shaft to move in the vertical direction together with the slide base.

[0005] The second spindle shaft is inserted so as to be integrally rotatable with the first spindle shaft, and is provided so as to be movable in the axial direction with respect to the first spindle shaft. Second
An outer peripheral surface of a lower end portion of the spindle shaft has a tapered outer surface that fits into an inner peripheral surface of a taper formed on an inner peripheral surface of a lower end portion of the first spindle shaft. The second spindle shaft is moved up and down with respect to the first spindle shaft by an oscillation mechanism.

[0006] The machining head is connected to the lower end of the second spindle shaft, and a boring tool (primary machining tool) and a honing machining tool (secondary machining tool) are provided on the outer periphery thereof. It is arranged. A plurality of coolant liquid supply paths for supplying a coolant liquid to the boring tool and the honing tool are provided near the boring tool and the honing tool.

In the multi-tasking machine configured as described above, when the boring operation is performed, the tapered outer surface of the second spindle shaft has the first surface.
The second spindle shaft is moved to the lower end side with respect to the first spindle shaft during the honing process, so that the outer surface of the second spindle shaft is tapered from the inner surface of the first spindle shaft. It comes off to the lower end side.

That is, in order to perform boring and honing in a hole of a work using the combined machining apparatus having the above-described configuration, first, the slide base is lowered while the both spindle shafts are tapered and the machining head is moved. Move it closer to the hole in the work. In the approaching state, the first and second spindle shafts and the processing head are rotating integrally. Therefore, by further lowering the slide base and inserting the machining head into the hole of the work, boring by the boring tool arranged on the machining head is performed.

Next, after raising the slide base together with the housing and both spindle shafts by a predetermined stroke, the second spindle shaft is reciprocated vertically with respect to the first spindle shaft. As a result, the machining head reciprocates in the vertical direction, and the honing of the hole is performed by the honing tool.

In the honing process, as described above, the tapered outer surface of the second spindle shaft separates from the tapered inner surface of the first spindle shaft toward the distal end, and the taper fitting between the second spindle shaft and the first spindle shaft is performed. Is canceled.

In the combined machining apparatus having the above-described configuration, the boring operation and the honing operation can be performed on the same spindle. For this reason, two types of machining, ie, boring and honing, can be performed sequentially and continuously only by positioning the work and the spindle shaft once, and these processes can be performed efficiently.

In addition, a relatively large load is applied to the second spindle shaft particularly during boring, but during this boring, the second spindle shaft is taperedly fitted to the first spindle shaft to integrate the two. Therefore, sufficient rigidity is secured.

During the boring and honing operations, a coolant liquid is supplied from outside to a coolant liquid supply passage provided in the machining head, and the coolant liquid is supplied to each tool from the coolant liquid supply passage. It has become. However, in the combined machining apparatus having the above configuration, during honing, the tapered outer surface of the second spindle shaft separates from the tapered inner surface of the first spindle shaft toward the distal end, and a gap is formed between the tapered outer surface and the tapered inner surface. Will occur.

[0014] For this reason, coolant liquid, cutting chips and the like scattered around during the honing process enter the gap.
As a result, in the subsequent boring operation, coolant or cutting chips intervene in the taper fitting portion of both spindle shafts, resulting in incomplete taper fitting or malfunction of the device. Had become.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and a first spindle shaft and a second spindle shaft concentrically inserted therein are taperedly fitted. In a multi-tasking machine that performs primary processing and performs secondary processing with the taper fitting released, prevents coolant liquid, cutting chips, etc. from entering through a gap created between both spindle shafts during secondary processing It is an object of the present invention to provide a combined machining apparatus capable of performing the above-described operations.

[0016]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cylindrical first spindle shaft having a tapered inner surface which increases in diameter toward the distal end on the inner peripheral surface of the distal end portion. A housing for rotatably supporting an outer peripheral portion of the first spindle shaft; and a housing rotatably inserted integrally and concentrically with the first spindle shaft, and being movable in an axial direction with respect to the first spindle shaft. A second spindle shaft having a tapered outer surface formed on the outer peripheral surface of the tapered portion to be fitted to the tapered inner surface; a primary machining tool and a secondary working tool connected to the distal end of the second spindle shaft; A processing tool is provided, and includes a processing head provided with a coolant liquid supply path for supplying a coolant liquid to the primary processing tool and the secondary processing tool. 2nd spin The outer surface of the taper of the first spindle is taperedly fitted to the inner surface of the first spindle, and at the time of secondary machining, the second spindle moves toward the distal end with respect to the first spindle, and In a multi-tasking machine in which the tapered outer surface of the two spindle shaft is separated from the tapered inner surface of the first spindle shaft toward the distal end, the tapered outer surface is inserted into the distal end of the second spindle shaft facing the housing. And a support member supported so as to be able to approach and separate from the housing as the second spindle shaft moves in the axial direction, and a tip of the first and second spindle shafts between the housing and the support member. Along with enclosing the periphery of the part, both ends are connected to the housing and the support member, and the housing and the
An extendable bellows for holding a supporting member in a liquid-tight manner, and the first and second spindles
The guide rod that guides in the axial direction of the shaft
From one of the housing and support member to the other.
It is protruded near the inner peripheral part of the bellows
It is characterized by the following.

[0017]

Further, the present invention is directed to a cylinder which covers the tapered outer surface of the second spindle shaft, and is provided so as to be externally insertable at the distal end of the first spindle shaft in a state where the two spindle shafts are tapered. A protection member having a shape of a bar is fixedly provided at the tip of the second spindle shaft inside the bellows.

[0019]

According to the multi-tasking machine of the present invention, the multi-tasking machine is externally attached to the tip of the second spindle shaft facing the housing, and is supported by the housing so as to be able to approach and separate from the housing as the second spindle shaft moves in the axial direction. and a support member, between the supporting member and the housing, while being interposed by encapsulating the periphery of the distal end portion of the first and second spindle axis, its opposite ends are coupled to the housing and the support member, wherein Housing and said support
And a stretchable bellows for holding the member in a liquid-tight manner . Therefore, even if the tapered outer surface of the second spindle shaft separates from the tapered inner surface of the first spindle shaft to the distal end side during the secondary processing, and a gap is generated between the tapered outer surface and the tapered inner surface, the gap is removed from this gap. It is possible to prevent coolant liquid, cutting chips, and the like scattered around during secondary processing from entering.

Further, a guide rod for guiding the expansion and contraction of the bellows in the axial direction of the first and second spindle shafts is protruded from at least one of the housing and the support member toward the inner peripheral portion of the bellows. Since the bellows are provided, it is possible to prevent the bellows from sagging radially inward and being caught between the tapered inner surface of the first spindle shaft and the tapered outer surface of the second spindle shaft.

Further, a cylindrical protective member which covers the outer surface of the taper of the second spindle shaft and is provided so as to be externally insertable at the tip of the first spindle shaft in a taper fitting state of both spindle shafts, is provided with a bellows. In the case where the bellows is broken and the coolant or the like enters the bellows in the event that the bellows is damaged and the coolant or the like enters inside the bellows, the coolant or the cutting chips enter through the gap. Can be prevented.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, a combined machining apparatus H that performs boring and honing on the hole X of the work W is taken as an example. FIG. 1 is a cross-sectional view of a main part of a multi-tasking machine H according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG.
3 is a sectional view taken along line III-III of FIG. 2, and FIG.
FIG. 5 is a cross-sectional view taken along a line V-IV, and FIG.

The combined machining apparatus H includes a housing 1, a first spindle shaft 7, a second spindle shaft 13, a machining head 22, a support member 48, a bellows 60, and a guide rod 64.
And a protection member 67.

The housing 1 is formed in a cylindrical shape, and a flange 4 is formed at the upper and lower ends of the housing 1. A plurality of rods 5 movable in the axial direction are inserted through the flange portions 4 at predetermined intervals in the circumferential direction. In the arranged state, the rod 5 is urged upward by a spring (not shown). Further, a through hole 6 is formed at the tip of the rod 5 so as to penetrate in the radial direction. The housing 1 configured as described above is provided on a frame 3 via a slide base 2 as shown in FIG. The slide base 2 can be moved in the vertical direction by a cylinder (not shown). Therefore, the housing 1 also moves in the vertical direction as the slide base 2 moves in the vertical direction.

The first spindle shaft 7 is formed in an elongated cylindrical shape. As shown in FIG. 1, the first spindle shaft 7 is formed at a small diameter portion 8 which is long in the vertical direction and at a lower end of the small diameter portion 8. And a large-diameter portion 9. The inner peripheral surface of the large-diameter portion 9 forms a tapered inner surface 10 whose diameter increases downward. In the first spindle shaft 7 configured as described above, the small-diameter portion 8 is inserted into the housing 1 with the large-diameter portion 9 protruding downward from the housing 1, and the housing 11 is connected to the housing 1 through bearings 11 and 12. 1 so as to be rotatable. In the supported state, the first spindle shaft 7 can move up and down integrally with the housing 1.

The second spindle shaft 13 is formed in an elongated cylindrical shape, and has a small diameter portion 14 which is long in the vertical direction as shown in FIG. At the lower end of the small diameter portion 14, a tapered portion 15 whose diameter increases downward is formed, and the outer peripheral surface of the tapered portion 15 forms a tapered outer surface 16. The shape of the tapered outer surface 16 fits with the tapered inner surface 10 of the first spindle shaft 7. A large diameter portion 17 is formed at the lower end of the tapered portion 15. On the outer peripheral surface of the large-diameter portion 17, one end of a coolant flow passage 18 is opened at predetermined intervals in the circumferential direction. The other end of each of the coolant flow passages 18 is open at the lower end surface of the large diameter portion 17. A flange 19 is formed at the upper end of the large diameter portion 17. The outer diameter of the flange portion 19 corresponds to the large diameter portion 9 of the first spindle shaft 7.
It is almost the same as the outside diameter of. Note that a tapered surface 20 whose diameter increases downward is formed on the inner peripheral surface of the lower end portion of the second spindle shaft 13.

The second spindle shaft 1 constructed as described above
The reference numeral 3 is inserted through the first spindle shaft 7 so as to be concentric therewith. In the arranged state, the outer peripheral surface of the small diameter portion 14 of the second spindle shaft 13 and the inner peripheral surface of the small diameter portion 8 of the first spindle shaft 7 are spline-coupled (not shown). The second spindle shaft 13 can rotate integrally with the first spindle shaft 7.

The small diameter portion 14 of the second spindle shaft 13
A metal bush 21 is arranged between the outer peripheral surface of the first spindle shaft 7 and the inner peripheral surface of the small diameter portion 8 of the first spindle shaft 7, whereby the second spindle shaft 13 is vertically moved with respect to the first spindle shaft 7. It is slidable in the direction. An oscillation mechanism (not shown) is connected to the upper end of the second spindle shaft 13, and by operating this oscillation mechanism, the second spindle shaft 13 is moved to the first spindle shaft 13.
It slides up and down with respect to the spindle shaft.

As shown in FIG. 1, the processing head 22 includes a head main body 23, a driven pulley 24 formed at an upper end of the head main body 23, and a pulley belt 24a wound around an outer peripheral portion thereof. And a tapered portion 25 formed at the upper end of the pulley 24.

The head body 23 is formed in a cylindrical shape, and a boring wheel 26 having hard particles (not shown) such as diamond adhered to the outer peripheral surface is fitted to the lower end thereof. They are fixed together (see FIG. 3). As shown in FIGS. 2 and 3, six grooves 27 extending along the axis are formed at equal intervals in the circumferential direction on the outer peripheral portion of the head body 23 above the boring wheel 26.
The through hole 28 and the through hole 29a penetrating to the inside of the head main body 23 are provided at the center and the upper and lower edges of the bottom surface of the groove 27.
29b are respectively formed. As shown in FIGS. 2 and 3, the groove 27 and the through holes 28, 29 a, and 29 b are provided with a rough honing grindstone table 30 (hereinafter simply referred to as “rough grinding wheel table”) and a finish honing processing. Three grindstone heads 31 (hereinafter simply referred to as “finishing whetstone heads”) are alternately inserted three by one in the circumferential direction.

More specifically, as shown in FIG. 3, the rough grindstone table 30 and the finishing grindstone table 31 both extend in the vertical direction from the upper and lower ends of the trunk 32, which are long in the vertical direction. Outgoing legs 33a. 33b, the rough grinding wheel 34 is attached to the outer surface of the body 32 of the rough grindstone table 30, and the body 32 of the finishing grindstone table 31 is attached.
A finishing whetstone 35 is adhered to the outer surface of the. Further, each leg 33a, 3 of the rough grinding wheel head 30 and the finishing wheel head 31.
An inclined surface 36 is formed at the tip of 3b.

The rough grindstone table 30 and the finishing grindstone table 31 configured as described above are provided with a body 32 and legs 33a, 33.
b is inserted into the groove 27 and the through holes 29a and 29b so as to be movable in the radial direction. In the fitted state, the inclined surfaces 36 of the legs 33a and 33b protrude into the head main body 23. These inclined surfaces 36
, The inclined surfaces 39 of the roughing grindstone drive shaft 37 and the finishing grindstone drive shaft 38 that are inserted and arranged inside the head main body 23 are in contact with each other.

As will be described later, the rough grinding wheel drive shaft 37 and the finishing grinding wheel drive shaft 38 can be independently moved in the axial direction in the vertical direction. Therefore, when the roughing grindstone drive shaft 37 (or the finishing grindstone driving shaft 38) moves upward from the above-mentioned contact state, the rough grindstone table 30 (or the finishing grindstone) is formed by the cam action between the inclined surfaces 36 and 39. Stand 3
1) moves radially outward, and the rough grindstone 34 (or the finishing grindstone 35) attached to the body 32 projects from the outer peripheral portion of the head main body 23.

On the other hand, when the rough grindstone drive shaft 37 (or the finishing grindstone drive shaft 38) moves downward from above, the rough grindstone table 30 (or the finish grindstone table) is formed by the cam action between the inclined surfaces 36 and 39. 31) moves radially inward, and the rough grindstone 34 (or the finishing grindstone table 35) attached to the body 32 sinks inward from the outer peripheral surface of the head main body 23.

In FIGS. 2 and 3, reference numeral 40 denotes
It is a connecting member for connecting the rough grinding wheel head 30 (finishing wheel head 31) and the rough grinding wheel drive shaft 37 (finishing wheel drive shaft 38). The connecting member 40 has one end connected to the center of each body 32 of the rough grinding wheel base 30 (finishing wheel base 31) via a bolt 41, and the other end penetrating through the through hole 28 for roughing. It is slidably fitted into an inclined groove 42 formed on a grinding wheel drive shaft 37 (finishing wheel drive shaft 38). This inclined groove 4
Numeral 2 extends so as to correspond to the inclination angles of the inclined surfaces 36 and 39. Therefore, the connecting member 40 is interlocked with the radial movement of the rough grindstone base 30 (finishing grindstone base 31). ing.

Also, as shown in FIG.
A plurality of coolant flow passages 43 extending along the axial direction are formed at predetermined intervals in the circumferential direction.
The upper end of the coolant flow passage 43 opens at the upper end surface of the driven pulley 24, and these openings 43a
The coolant flow passage 18 opens at the lower end surface of the large diameter portion 17 of the spindle shaft 13 and faces the opening 18a. Further, one end of a coolant liquid supply hole 44 is opened on the inner peripheral surface of the coolant liquid flow passage 43, and the other ends of the coolant liquid supply holes 44 extend radially outward to form the head body 23. It is open on the outer peripheral surface.

The processing head 22 thus configured is
The tapered portion 25 is connected to a lower end portion of the second spindle shaft 13 via a bolt 45 or the like while being fitted to the tapered surface 20 of the second spindle shaft 13. In the connected state, the coolant flow passage 43 and the second spindle shaft 1
The coolant liquid flow passage 18 formed in the inside 3 communicates with the coolant flow passage 18.

As shown in FIG. 1, the upper end of the rough grinding wheel drive shaft 37 is connected to the lower end of a rod 46 inserted through the second spindle shaft 13 via a connecting member 47. Have been. At the upper end of the rod 46, a first
It is connected to a piston cylinder mechanism (not shown). By operating the first piston cylinder mechanism, the rod 46 moves integrally with the rough grinding wheel drive shaft 37 in the axial direction in the vertical direction.

Further, the upper end of the finishing grindstone drive shaft 38 is connected via a connecting member 47a to the lower end of a rod 46a inserted through the rod 46. The upper end of the rod 46a is connected to a second piston cylinder mechanism (not shown). By operating the second piston-cylinder mechanism, the rod 46a moves in the vertical direction along the axis thereof integrally with the finishing grindstone drive shaft 38.

The support member 48 has a disc-shaped bottom 49 and a cylindrical wall 50 extending upward from the bottom 49.
And a flange portion 51 formed at an upper end portion of the wall portion 50.
And

The bottom portion 49 has a through hole 52 formed at the center thereof, and the through hole 52 has a diameter slightly larger than the outer diameter of the large diameter portion 17 of the second spindle shaft 13. . An annular groove 53 is formed on the inner peripheral surface of the through hole 52. At the bottom surface of the annular groove 53, one end of a coolant flow passage 54 is opened at predetermined intervals in a circumferential direction. The other end of the coolant liquid passage 54 extends radially outward in the bottom 49.

The inner diameter of the wall 50 is larger than the outer diameter of the flange 19 of the second spindle 13. A plurality of coolant flow paths 55 extending in the axial direction are formed in the wall 50 at predetermined intervals in the circumferential direction, and one end of each of the coolant flow paths 55 is
The coolant liquid passage 54 communicates with each other end.

The outer diameter of the flange 51 is substantially the same as the outer diameter of the flange 4 of the bearing 1. At the outer peripheral surface of the flange portion 51, a plurality of one ends of the coolant inflow holes 56 are opened at predetermined intervals in the circumferential direction. The other end of the coolant inflow hole 56 extends radially inward in the flange portion 51 and communicates with the other end of the coolant flow passage 55. The other end of the flexible tube 57 or the like, one end of which is connected to a coolant liquid supply device (not shown), is liquid-tightly connected to the opening 56a of the coolant liquid inlet 56.

The upper end surface of the flange portion 51 has a through hole 58 passing through the coolant inflow hole 56 and penetrating to the lower end surface.
Are formed at predetermined intervals in the circumferential direction. The axes of these through holes 58 match the axes of the rods 5 of the housing 1, and the diameters of the holes are substantially the same as the outer diameter of the tip of the rod 5.

The support member 48 thus configured is configured such that the through hole 52 of the bottom portion 49 has the large diameter portion 1 of the second spindle shaft 13.
7 extrapolated. In the externally inserted state, as described above, since the hole diameter of the through hole 52 is slightly larger than the outer diameter of the large diameter portion 17, the second spindle shaft 13
The inner peripheral surface of the through hole 52 is rotatable in a non-contact state. This prevents heat generation due to friction between the through hole 52 and the large diameter portion 17 when the second spindle shaft 13 rotates. The coolant flow passage 54 is connected to the coolant flow passage 18 of the second spindle 13 via the annular groove 53.
Is in communication with Further, the through hole 58 of the flange portion 51
The tip of the rod 5 is connected via a nut 59 or the like in a state where the through hole 6 is communicated with the coolant inflow hole 56. In the connected state, the support member 48
Is urged upward by a spring of the rod 5 in a state where the flange portion 19 of the second spindle shaft 13 is in contact with the upper end surface of the bottom portion 49, whereby the support member 48 is moved up and down of the second spindle shaft 13. Housing 1
It is supported so that it can approach and separate.

As shown in FIG. 1, the bellows 60 is interposed between the housing 1 and the support member 48, and is formed in a vertically expandable and contractible cylindrical shape. Bellows 60
Has an outer diameter smaller than the inner diameter of the wall 50 of the support member 48. The inner diameter of the bellows 60 is larger than the outer diameter of the flange portion 19 of the second spindle shaft 13. The bellows 60 thus configured has an upper end liquid-tightly connected to a lower end surface of the bearing 1 via a bolt 61, and a lower end connected to the upper end surface of the bottom 49 of the support member 48 by the bolt 62 and the ring member. It is connected in a liquid-tight manner via 63. In the connected state, the bellows 60
In addition, with the lower end portions of the second spindle shafts 7 and 13 being covered, the support member 48 expands and contracts in the vertical direction as the support member 48 moves in the vertical direction.

The guide rod 64 is provided in a space formed between the inner peripheral portion of the bellows 60 and the outer peripheral surfaces of the lower end portions of the first and second spindle shafts 7 and 13.
As shown in FIG. 7, two rod members 65 and 66 are provided.
The rod members 65 and 66 have the same shape. One end of the rod member 65 is connected to the upper end surface of the bottom 49 of the support member 48, and one end of the rod member 66 is located below the bearing 1. It is connected to the end face. In the linked state,
As shown in FIG. 4, the respective axes of the bar members 65 and 66 are spaced apart from each other, whereby the bar members 65 and
6 without any interference between the other ends.
Is moved in the up-down direction along with the up-down movement.

In a state where the rod members 65 and 66 are connected, the rod members 65 and 66 are arranged such that the outer peripheral portion thereof is close to the inner peripheral portion of the bellows 60, whereby the bellows 60 are provided. Of the first and second spindle shafts 7 and 13 in the axial direction, and the bellows 6
The bellows 60 is supported so as to prevent the bellows 60 from slacking inward in the radial direction. The guide rods 64 configured as described above are provided at three locations at a pitch of 120 ° in the circumferential direction.

The protection member 67 includes the guide rod 64 and the second
It is provided in a space between the spindle shaft 13 and the flange portion 19, and is formed in a cylindrical shape as shown in FIG. Inside the protective member 67, a mounting hole 68 and a tapered hole 69 whose diameter increases upward are formed sequentially from the lower end to the upper end. The hole diameter of the mounting hole 68 is
The outer diameter of the flange portion 19 of the second spindle shaft 13 is substantially the same. Protective member 67 thus configured
The mounting hole 68 is fitted and fixed to the outer peripheral surface of the flange portion 19 via a bolt 70, whereby the tapered outer surface 16 of the second spindle shaft 13 is covered by the tapered hole 69 of the protection member 67. ing. The tapered hole 69 can be inserted into and removed from the outer peripheral surface of the large-diameter portion 9 of the first spindle shaft 7 when the second spindle shaft 13 moves up and down in the axial direction.

The multi-tasking machine H thus configured is:
At the time of boring, as shown in FIG. 1, the tapered outer surface 16 of the second spindle shaft 13 is taperedly fitted to the tapered inner surface 10 of the first spindle shaft 7, and at the time of honing, as shown in FIG. The second spindle shaft 13 moves downward with respect to the first spindle shaft 7 so that the tapered outer surface 16 of the second spindle shaft 13 becomes the tapered inner surface 10 of the first spindle shaft 7.
From the lower end.

In order to perform boring and honing on the hole X of the workpiece W using the multi-tasking machine H having the above configuration,
First, the slide head 2 is moved downward so that the processing head 22 approaches the hole X. At this time, the processing head 22
Moves downward integrally with the housing 1, the first and second spindle shafts 7, 13 and the support member 48,
It rotates integrally with the first and second spindle shafts 7 and 13. Accordingly, by boring the machining head 22 through the hole X by moving the slide base 2 further downward, boring of the hole X by the boring wheel 26 disposed on the head main body 23 is performed. At the time of boring, a coolant liquid is flowing from the opening 56a of the coolant liquid inlet hole 56, and the coolant liquid flows through the coolant liquid passages 55, 54, 18, and 43, and the coolant liquid supply holes 44. And is supplied to the boring wheel 26 of the head body 23.

After the boring is completed, honing is performed. To perform honing, first, the slide base 2 is moved upward by the honing stroke, and the processing head 22 is set to the honing position. At this time, the processing head 22 is rotating integrally with the first and second spindle shafts 7 and 13. Next, the first
Activate the piston cylinder mechanism to drive the rough grinding wheel drive shaft 3.
7 is moved upward, and the rough grindstone 34 is projected outward from the outer peripheral portion of the head main body 23. Next, the second spindle shaft 13 is reciprocated vertically with respect to the first spindle shaft 7 by operating the oscillation mechanism. This allows
The processing head 22 reciprocates in the vertical direction, and the rough grindstone 34
Rough honing of the hole X is performed.

Next, the first piston cylinder mechanism is operated to move the rough grindstone drive shaft 37 downward, and the rough grindstone 34 is immersed inward from the outer periphery of the head body 23.
At this time, the processing head 22 is set at the honing processing position described above. Next, the second grindstone drive shaft 38 is moved upward by operating the second piston cylinder mechanism, and the finishing grindstone 35 is made to protrude outward from the outer peripheral portion of the head main body 23.

Then, the finishing honing of the hole X by the finishing whetstone is performed by reciprocating the working head 22 in the vertical direction in the same manner as in the case of the rough honing. At the time of rough honing and finish honing, coolant is supplied to the rough grindstone and the finishing grindstone in the same manner as in the case of boring.

Next, by operating the second piston cylinder mechanism, the finishing grindstone drive shaft 38 is moved downward, and the finishing grindstone 35 is immersed inward from the outer periphery of the head main body 23. Thereafter, the slide base 2 is moved upward, and the processing head 22 is extracted from the hole X of the work W. Thus, boring and honing of the hole X of the work W are completed.

In the multi-tasking machine H having the above-described structure, the bellows 60, which can be extended and contracted in the axial direction, is provided between the housing 1 and the support member 48 by the first and second spindle shafts 7, 1.
The bellows 60 has a lower end liquid-tightly connected to the upper end surface of the support member 48 and an upper end liquid-tightly connected to the lower end surface of the housing 1. Have been. Therefore, at the time of roughing and finishing honing, the tapered outer surface 16 of the second spindle shaft 13 is separated from the tapered inner surface 10 of the first spindle shaft 7 toward the lower end, and a gap is formed between the tapered outer surface 16 and the tapered inner surface 10. Even when cracks occur, it is possible to reliably prevent the coolant liquid, cutting chips, and the like scattered around during the rough and finish honing from entering the gap. As a result, during the subsequent boring, like the conventional multi-tasking machine,
There is no possibility that coolant liquid or cutting chips intervene in the tapered fitting portions of the first and second spindle shafts 7 and 13 so that the tapered fitting becomes incomplete and the device does not malfunction.

The space formed between the inner peripheral portion of the bellows 60 and the outer peripheral surfaces of the lower end portions of the first and second spindle shafts 7 and 13 is provided with the extension and contraction of the bellows 60 for the first and second spindle shafts. Guide rod 6 for guiding in the axial direction of 7, 13
4 is arranged such that its outer peripheral portion is close to the inner peripheral portion of the bellows 60. Therefore, it is possible to prevent the bellows 60 from loosening inward in the radial direction and being caught between the tapered inner surface 10 of the first spindle shaft 7 and the tapered outer surface 16 of the second spindle shaft 13.

Further, in a space between the guide rod 64 and the flange portion 19 of the second spindle shaft 13, a protection member 67 for covering the tapered outer surface 16 of the second spindle shaft 13 is provided.
Is provided. For this reason, even when the bellows 60 is damaged and coolant liquid or the like enters the bellows 60, it is possible to prevent the coolant liquid or cutting chips from entering the gap.

[0059]

As is apparent from the above description, according to the combined machining apparatus of the present invention, the multi-tasking machine is externally inserted into the distal end of the second spindle shaft facing the housing, and moves in the axial direction of the second spindle shaft. The first member is supported between the housing and the supporting member so as to be able to approach and separate from the housing.
And the end of the second spindle shaft is wrapped around and interposed therebetween, and both ends of the second shaft are connected to the housing and the support member to keep the housing and the support member liquid-tight.
It has a stretchable bellows to hold . Therefore, even if the tapered outer surface of the second spindle shaft separates from the tapered inner surface of the first spindle shaft to the distal end side during the secondary processing, and a gap is generated between the tapered outer surface and the tapered inner surface, the gap is removed from this gap. It is possible to prevent coolant liquid, cutting chips, and the like scattered around during secondary processing from entering. As a result,
At the time of subsequent boring, as in the case of the conventional multi-tasking machine, the taper fitting between the first and second spindle shafts is incomplete due to the presence of coolant or cutting chips etc. Or the device does not malfunction.

Further, a guide rod for guiding the expansion and contraction of the bellows in the axial direction of the first and second spindle shafts is protruded from at least one of the housing and the support member toward the other of the inner peripheral portion of the bellows. Since the bellows are provided, it is possible to prevent the bellows from sagging radially inward and being caught between the tapered inner surface of the first spindle shaft and the tapered outer surface of the second spindle shaft.

Further, a cylindrical protective member which covers the outer surface of the taper of the second spindle shaft and which can be externally inserted at the tip of the first spindle shaft in a taper fitting state of both spindle shafts, is provided with a bellows. In the case where the bellows is broken and the coolant or the like enters the bellows in the event that the bellows is damaged and the coolant or the like enters inside the bellows, the coolant or the cutting chips enter through the gap. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a multifunctional processing apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 1;

FIG. 5 is a sectional view of a main part showing a honing state of the combined machining apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 10 ... Taper inner surface, 7 ... First spindle shaft, 16 ... Taper outer surface, 13 ... Second spindle shaft, 2
6 ... boring wheel (primary processing tool), 30 ...
Whetstone head for rough honing (secondary processing tool), 31 ...
Wheel head for finishing honing (secondary processing tool), 4
4: Coolant liquid supply hole, 22: Processing head, 48: Support member, 60: Bellows, 64: Guide rod, 67:
Protective material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B23B 39/00 B23B 19/02 B23Q 11/00 B24B 33/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A cylindrical first spindle shaft having a tapered inner surface increasing in diameter toward the distal end formed on the inner peripheral surface of the distal end portion, and a housing rotatably supporting the outer peripheral portion of the first spindle shaft. And a taper fitted to the first spindle shaft so as to be rotatable integrally with the first spindle shaft and movable in the axial direction with respect to the first spindle shaft. A second spindle shaft having an outer surface formed thereon, connected to a tip end of the second spindle shaft, and a primary processing tool and a secondary processing tool are provided on an outer peripheral portion thereof; wherein a processing head coolant supply passage is provided for supplying a coolant to the secondary processing tool, when the primary processing, wherein the tapered outer surface of the second spindle axis of the first spindle axis Te During the secondary machining, the second spindle shaft moves to the distal end side with respect to the first spindle shaft so that the tapered outer surface of the second spindle shaft becomes the first spindle shaft. In the combined machining apparatus configured to separate from the inner surface of the taper to the distal end side, it is externally inserted into the distal end of the second spindle shaft so as to face the housing, and is adapted to move in the axial direction of the second spindle shaft. A supporting member supported so as to be capable of approaching and separating from the housing, and being interposed between the housing and the supporting member so as to cover the periphery of the distal ends of the first and second spindle shafts. , Both ends of which are connected to the housing and the support member to keep the housing and the support member liquid-tight.
And a telescopic bellows for lifting, the expansion and contraction of the bellows of the first and second spindle axis
A guide rod for guiding in the axial direction is at least
From either the housing or the support member to the other
The bellows are protruded in the vicinity of the inner periphery of the bellows.
Combined processing apparatus characterized by the above-mentioned. 2. A cylindrical protection member enclosing the tapered outer surface of the second spindle shaft and externally provided at the distal end of the first spindle shaft in a taper fitting state of the two spindle shafts. Is fixedly mounted inside the bellows at the tip of the second spindle shaft.
The combined processing apparatus according to the above.