JP2961626B2 - Multi-axis boring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-axis boring apparatus for simultaneously machining a large number of holes, and more particularly to a protruding drive apparatus for adjusting the diameter of a machined hole by changing the turning radius of the cutting edge of the tool.

[0002]

2. Description of the Related Art A multi-axis boring apparatus of this type includes a boring shaft head B and a protruding driving device A mounted on a moving table 11 as shown in FIG. Part B
A plurality of main shafts are supported by the head main body 60, and the operating shafts 67, 67A inserted coaxially from the rear ends of the respective main shafts are protruded and axially driven by the driving device A, so that the cutting tools T, TA provided at the front ends of the main shafts. In some cases, the radius of rotation of the cutting edge is changed to adjust the diameter of the processing hole or to escape the cutting edge when retreating after processing. Then, as shown in FIG. 6, for example, as shown in FIG. 6, a conventional protruding drive device A includes a hollow frame 2 (only one is shown) corresponding to each main shaft and a cylindrical body 2b mounted on a support frame 1 fixed on a moving table 11. And the movable shafts 3 are supported coaxially with each other, and the front end of each movable shaft 3 is connected to the connecting plate 9a.
In addition, they are connected to the respective operating shafts 67 and 67A via the rotary joint 9. Each hollow shaft 2 is rotated by a separate response motor 4 via a gear 5b and a pinion 5a, which are spline-engaged on the outer periphery thereof, so that the hollow shaft 2 is at a predetermined axial position corresponding to the radius of rotation of the cutting edges of the cutting tools T and TA. When the movable shaft 3 moves forward by the hydraulic cylinder 6, the operating shafts 67 and 67A also move forward to release the cutting tools T and TA inward,
When retracted, the operating shafts 67, 67a are retracted until the step 3a of the movable shaft 3 comes into contact with the front end of the hollow shaft 2, and the cutting tools T, TA
Is set to have a predetermined radius of rotation. The axial position of each hollow shaft 2 is controlled by six dogs 7a to 7f and proximity switches 8a to 8f provided respectively.

[0003]

In such a conventional technique, six sets of dogs and proximity switches and a hydraulic cylinder 6 are required for one main shaft, so that wiring and piping are complicated, and Since the plurality of hollow shafts 2 and the movable shafts 3 are arranged close to each other, it is troublesome to adjust the proximity switch, and it is necessary to dispose them in the longitudinal direction. It will be great. Further, even when the inspection and adjustment or replacement of one set of the hollow shaft 2 and the movable shaft 3 is performed, it is necessary to disassemble the entire protruding drive device A, so that there is a problem that such inspection and adjustment are troublesome.

On the other hand, it is conceivable that the movable shaft connected to the operating shafts 67, 67A is axially moved by a servo motor instead of the response motor. According to this, the former problem can be solved, but the latter problem that it takes time to perform inspection and adjustment cannot be solved. The present invention provides such a unit by forming a set of an axially moving member for moving each of the operating shafts 67 and 67A, a servo motor for projecting, and an interlocking mechanism for connecting the two together. The purpose is to solve the problem.

[0005]

To this end, a multi-axis boring device according to the present invention is provided with a head body 60 mounted on a table 11 to support the bearings in parallel with each other, as shown in FIGS. A plurality of main shafts 61
A, the cutting tools T, TA supported by the respective spindles, and the coaxial insertion from the rear end side of the respective spindles 61, 61A, and the rotation of the cutting edges of the cutting tools T, TA with respect to the spindle axis by the axial movement with respect to the respective spindles. A boring shaft head B composed of working shafts 67 and 67A for changing the diameter of the processing hole by changing the radius, and each of the boring shaft heads B provided on the table 11 on the rear side of the boring shaft head B. A plurality of axial moving members 3 coaxially and detachably connected to the operating shafts 67, 67A to axially move the respective operating shafts.
In a multi-axis boring device including a protruding drive device A having 2, 32 A, the protruding drive device A includes a support frame 20 supported by the table 11 at a rear side of the boring shaft head B, Each of the spindles 61, 61A is mounted on this support frame.
A plurality of support cylinders 30 and 30A coaxially attached to the support frame 20 so as to be able to be inserted and removed from the rear side thereof and coaxially and axially supporting the respective axial moving members 32.32A; The axial moving members 32, 3 provided at the end portions, respectively.
2A and the operating shafts 67, 67A connected thereto
A servomotor 37,37A for overhang for movement, each support tube provided in 30,30A the rotation of the servo motor 37,37A for each protruding each axial driving member 32,
Ball screw 34, ball nut for converting to 32A axial movement
Plural sets of interlocking mechanisms C comprising a coupling 33 and a coupling 40
Consists is characterized in Rukoto.

[0006]

[0007]

The respective support cylinders 30, 3 attached to the support frame 20
The shaft members 32, 32A of 0A are ball screws 34,
Interlocking mechanism C composed of a nut 33 and a coupling 40
, And the operating shaft 67 connected to each of the shaft moving members 32 also moves together with the shafts, so that the cutting tools T, which are supported by the main shafts 61, 61A, respectively.
The diameter of the processing hole is adjusted by changing the turning radius of the cutting edge of the TA.

Each of the support cylinders 30, 30A is provided with a respective one of the spindles 61, 6
Axial members 32, 32A for changing the radius of rotation of the cutting edge of the cutting tool T, TA of 1A, an interlocking mechanism C, and a servomotor 3 for protruding.
7 , 37A as a unit for each set, and each support cylinder 30,
Each unit including 30A, if not remove the coupling of the operating shaft 67,67A and axial driving member 32, 32A, individual support frame 2
It can be pulled backwards from zero .

[0009]

As described above, according to the present invention, when checking or adjusting or replacing the interlocking mechanism and the protruding servomotor in one support cylinder corresponding to one set of spindles, the support cylinder is required. can be done by extracting backward only unit comprising a support frame, it is not necessary to disassemble the entire protruding drive. Therefore, the labor required for such inspection adjustment can be reduced.

In addition, a supporting cylinder and a servo motor for protruding are provided.
Hydraulic cylinder is used for the protruding drive consisting of the interlocking mechanism
No proximity switch, etc.
Since no wires and pipes are required, the structure of the protruding drive unit
Can be simplified, and it is necessary to adjust the proximity switch.
You can save time and effort.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the overall structure of a multi-axis boring device according to the present embodiment will be described with reference to FIGS. A boring shaft head is supported on a bed 10 of the multi-axis boring device so as to be reciprocally movable in the front-rear direction (left-right direction in FIG. 1) and moved by a feed servo motor 12 on a feed table 11. B
However, a protruding drive device A is mounted on a rear portion, and a gantry 15 is mounted on an intermediate portion. As shown in FIG. 2, four support cylinders 3 each for upper and lower parts are provided in the support frame 20 of the protruding drive device A.
0, 30A (to be described in detail later) are attached in parallel to each other in the front-rear direction, and the rear ends thereof are used for protruding the axially moving members 32, 32A in the front-to-rear direction via an interlocking mechanism (to be described later). Servo motors 37 and 37A are provided.

In the head body 60 of the boring shaft head B, four main shafts 6 each in the upper and lower directions are coaxial with the support cylinders 30 and 30A.
1, 61A (described in detail later) are supported in parallel with each other, and the drive belt 1 is driven by a processing motor 16 provided on a gantry 15.
It is rotationally driven via 7, 17A. Each spindle 61, 61
A, operating shafts 67, 67A coaxially inserted from the rear of
Is connected to the distal ends of the axial moving members 32, 32A of the protruding drive device A, and is axially moved. The turning radius of the cutting edge of the cutting tool T, TA provided at the distal end portion of the main shafts 61, 61A is changed to change the processing hole diameter.
Adjustments are made .

Next, the protrusion driving device A will be described with reference to FIGS. Each support tube 30, 30A is supported by a support frame 20.
Are inserted into the eight support holes 21a to 23a formed in the three vertical wall plates 21 to 23 so as to be able to be inserted and removed from the rear side, and are tightened by the fastening screws 39 via the rear end flange portion 30d. It is fixed to the plate 21. In the following, the upper support tube 30 and its related members shown in cross section in FIG. 3 will be described, but the lower support tube 30A and its related members have substantially the same structure. Note that the support frame 20 is
And is fixed on the feed table 11 via the.

The support cylinder 30 has concentric holes 30a at the front and rear.
And 30b are formed, and a rear concentric hole 30
The maintenance window hole 31 communicating with b is formed. A protruding servomotor 37 is coaxially screwed and fixed to the rear surface of the flange portion 30d at the rear end of the support cylinder 30, and is slidable in the front concentric hole 30a and has a keyway 30c and a key 3c.
Axial member 3 whose rotation is prevented by 2a and which is fitted and supported
2 is a servomotor 37 for protruding through the interlocking mechanism C.
Is connected to and axially moved. On the front side of the vertical wall plate 23 of the support frame 20, a support cap 25 having an inner diameter portion having the same diameter as the front concentric hole 30 a is fixed by screwing, and the front end of the axial moving member 32 projects forward from the support cap 25. ing.

The interlocking mechanism C includes a ball nut 33, a ball screw 34, and a coupling 40 as main components. The ball nut 33 is provided coaxially in the rear half of the shaft moving member 32 and is screwed and fixed via a holding plate 33a. The small diameter portion 34a of the ball screw 34 screwed to the ball nut 33 extends rearward and rearward. The rear end reaching the concentric hole 30b is connected to the output shaft 37a of the servomotor 37 for protrusion through a coupling 40. The middle portion of the small diameter portion 34a of the ball screw 34 is
It is supported by an angular contact type rolling bearing 35 which is screwed and fixed to an intermediate portion of the support cylinder 30 via a holding plate 36 provided on the side b. The coupling 40 is composed of a pair of flange members 41 and 42 connected to each other by a connecting screw 44 via an intermediate member 43. Each of the flange members 41 and 42 is provided with a servo motor for protruding via a tightening screw 45 and 46, respectively. 37 and the small diameter portion 34a of the ball screw 34. FIG.
And as shown in FIG.
The fastening screw 4 and the fastening screw 46 and the fastening screw of the holding plate 36 are detachable from the maintenance window hole 31.

Next, the boring shaft head B will be described with reference to FIG. Head body 60 fixed on feed table 11
, Four upper and lower main shafts 61, 61A are coaxially supported with the respective axial moving members 32, 32A of the protrusion driving device A. Pulleys 68, 68A are fixed to the rear ends of the respective spindles 61, 61A by keys and ring nuts. Machining motor 1
6 is driven to rotate. In the following, the upper main shaft 61 and its related members shown in cross section in FIG. 4 will be described, but the lower main shaft 61A and its related members have substantially the same structure.

An operating shaft 67, which rotates together with the main shaft 61, is inserted into the cylindrical main shaft 61 via a key 67a so as to be axially movable from the rear end side, and the front end thereof is formed through a T-shaped projection and groove. And a wedge member 66 slidably guided and supported on the inner peripheral surface of the main shaft 61. The front half of the wedge member 66 is cut away except for the lower part, and the upper surface thereof is a wedge surface 66a which is slightly raised forward. A diametrical groove 61 a is formed at the front end of the main shaft 61, and the head of the tilting member 62 is rotatably supported between the protrusions on both sides of the main shaft 61 via a support shaft 63. A seat member 61 is provided between the bottoms of the receiving members 61a.
b is provided. Front end of main shaft 61 and tilting member 62
Is rotatable within a cover 60 a fixed to the front end face of the head main body 60.

The rear end 62a of the tilting member 62 overlaps the front half of the wedge member 66, and the lower surface thereof has a wedge surface 66a.
The slider 62b which can contact with a is fixed. A disc spring 65a is interposed between the head of the pressing element 65 provided in the hole formed on the side of the tip 62a of the tilting member 62 opposite to the slider 62b and the bottom of the hole, Presser 65
Is pressed against the inner surface of the inner hole of the main shaft 61, and the slider 62b
It is pressed against the wedge surface 66a. A spring 64 is provided between the head of the tilting member 62 and the seat member 61b to increase the pressing force between the slider 62b and the wedge surface 66a.

A flange 69a of a quill 69 having two cutting tools T is fixed to the front end face of the head of the tilting member 62. When the wedge member 66 advances with the advance of the operating shaft 67, the slider 62b slides on the inclined wedge surface 66a, and the tilting member 62 rotates counterclockwise about the support shaft 63, and The radius of rotation of the cutting edge T of the cutting tool T about the spindle axis of the cutting edge Ta decreases. Conversely, when the wedge member 66 is retracted together with the operating shaft 67, the radius of rotation of the cutting edge Ta of each cutting tool T increases. In this embodiment, the upper and lower quills 69, 69A are combined into one set to simultaneously bore the holes at the large end and the small end of the connecting rod of the internal combustion engine. 69A blade tool TA has better cutting edge Ta
Has a small turning radius.

As shown in FIG. 3, the rear end of the operating shaft 67 is connected to the front end of the shaft moving member 32 via the rotary joint 50 and the connecting plate 57. The rotary joint 50 has an outer ring of an angular contact type rolling bearing 53 fixed between two halves 51 and 52 which are divided in the axial direction and fixed by screws, and an inner ring of the rolling bearing 53 has an operating shaft. The rear end of 67 is fixed by nut 54. Projection drive A
The of axial driving member 32 radial grooves 32 in b formed at the tip of one end of the connecting plate 57 is pivotally supported via the inserted connecting pin 38, the other end of the connecting plate 57 is a half portion of the rotary joint 50 51
And is connected by a pin 55 with a head. Thereby, the axial movement of the shaft moving member 32 is transmitted to the operation shaft 67, and the rotation of the operation shaft 67 is allowed. The headed pin 55 is normally a set screw 56
However, if the set screw 56 is loosened and the headed pin 55 is pulled out, the shaft moving member 32 and the operating shaft 6 are removed.
7 consolidated of is removed. Axial member 32A and operating shaft 67
A also collected by the same coupling plate 57A and the rotary joint 50A
It is connected so that it can be removed .

Next, the operation of the above embodiment will be described. The following description will be made only with respect to the upper support cylinder 30 and the main shaft 61, but the same applies to the lower one. When the axially moving member 32 is axially moved via the interlocking mechanism C by the operation of each of the servo motors 37 for protruding, each of the operating shafts 67 is also axially moved, and the quill 69 provided at the tip of each of the corresponding main shafts 61 is used as the supporting shaft. 6
By turning around three times, the turning radius of the cutting edge Ta of the cutting tool T, TA about the main axis is changed. During machining, each of the servomotors 37 is controlled by a control device (not shown) so that the rotation radius becomes a predetermined value.
1 advances and performs boring. When the feed table 11 is retracted, the control device advances each axial moving member 32,
Thus, the rotation radius of the cutting edge Ta of each cutting tool T is reduced, and the cutting edge Ta is released.

When it is necessary to check or adjust or replace the interlocking mechanism C in the support cylinder 30 corresponding to any of the spindles 61 and the servo motor 37 for protruding, the corresponding headed pin 55 is removed and the rotary joint is removed. The connection between the shaft moving member 32 and the operating shaft 67 is released by disengaging the connection plate 50 and the connection plate 57, and the fastening screw 39 of the flange portion 30 d of the support cylinder 30 to the support frame 20 is removed. As a result, the support cylinder 30 and the axial moving member 32 attached thereto, the ball nut 33,
The ball screw 34, the protrusion servomotor 37, the coupling 40, and the like are an integrated unit, and
The support frame 20 is withdrawn independently of the support frame 20 irrespective of the components attached thereto. The necessary adjustments and replacements can therefore be made completely independently of the other parts of the drive A. This reduces the time required for such service adjustments or replacements.

Further, the support cylinders 30 and 30A are provided with
Axial member consisting of servo motors 37 and 37A and interlocking mechanism C
32 and the operating shaft 67 are driven by oil.
No pressure cylinder is used and no proximity switch is required
is there. Therefore, since wiring and piping are not required,
The structure of the driving device A is simplified, and the adjustment of the proximity switch is performed.
The work required for adjustment is also unnecessary.

[Brief description of the drawings]

FIG. 1 is an overall side view of a multi-axis boring device according to the present invention.

FIG. 2 is a rear view of the multi-axis boring device according to the present invention.

FIG. 3 is a partially cutaway side view of the protrusion driving device.

FIG. 4 is a side view of the boring shaft head partially broken away.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 3;

FIG. 6 is a partially cutaway side view of a protruding drive device of the related art.

[Explanation of symbols]

Reference numeral 11: table, 20: support frame, 30, 30A: support cylinder, 31, 31A: maintenance window hole, 32, 32A: shaft moving member, 33: ball nut, 34: ball screw, 37, 3
7A: Servo motor for projecting, 37a: Output shaft, 40
... coupling, 60 ... head body, 61, 61A ... main shaft, 67, 67A ... operating shaft, A ... protruding drive device, B
... boring shaft head, C ... interlocking mechanism, T, TA ... cutting tools.

Continuation of the front page (72) Inventor Masanao Kato 1-1-1 Asahi-cho, Kariya-shi, Aichi Prefecture Inside Toyota Koki Co., Ltd. (56) References Japanese Utility Model sho 59-50648 (JP, U) Japanese public utility sho 48-43969 ( (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B23B 39/00 B23B 39/16 B23B 39/22 B23B 29/034

Claims (1)

(57) [Claims] 1. A plurality of main shafts rotatably driven by being supported in parallel by a head main body mounted on a table, a cutting tool supported by each of the main shafts, and coaxial from the rear end side of each of the main shafts. The cutting radius of the cutting edge of the cutting tool is changed with respect to the spindle axis by axial movement with respect to the spindle.
A boring shaft head comprising an operating shaft for adjusting a drilling hole diameter; each operating shaft being provided on the table at the rear side of the boring shaft head and being coaxially and detachably connected to each of the operating shafts. A multi-axis boring device comprising a plurality of protruding driving devices having a plurality of axially moving members, wherein the protruding driving device includes a support frame supported by the table at a rear side of the boring shaft head. A plurality of support cylinders which are mounted on the support frame coaxially with the main shafts so as to be removable from the rear side of the support frame and support the respective axially movable members so as to be axially coaxial with each other; The axial moving member provided at each of the rear end portions
A servo motor for protruding the operating shaft connected thereto, and a ball which is provided in each of the support cylinders and converts the rotation of each servo motor for protruding into the axial motion of each of the axial moving members.
Flip, multi-axis boring device according to claim Rukoto is composed of a plurality of sets of interlocking mechanism comprising a ball nut and coupling.