JP2995305B2 - Gun drill machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tool change type gun drill machine having an intermediate vibration damping device.

2. Description of the Related Art In a gun drill machine that performs deep hole drilling by a long drill, it is necessary to prevent the long drill from bending during processing. As for a single drill type gun drill machine, an apparatus (Japanese Utility Model Publication No. Sho 45-16861) has been proposed in which an appropriate position of a drill is set. In this gun drill machine, the steady rest bush is slidably installed between the headstock and the tip shooter, and is pushed and moved by the headstock when the headstock advances, and when the headstock retreats,
The torsion bushing has a structure in which the torsion bushing is stopped at the initial position for the anti-vibration by the action of the tow rod and the stopper extending from the anti-vibration bush to the headstock. However, since this gun drill machine can only operate a single gun drill, when drilling multiple holes with different diameters, the steady rest bush must be replaced manually every time the diameter of the drill is changed. It took a lot of trouble and time.

When mounting the anti-vibration device on the gun drill machine, it is necessary to closely pass the drill through the through hole of the anti-vibration device. It is difficult to make accurate insertion into the hole.

Therefore, it is difficult to realize an automatic exchange type gun drill machine, and the realization has been awaited.

An object of the present invention is to provide a gun drill machine capable of automatically changing drills in order to meet this demand.

Means for Solving the Problems The object of the present invention is to provide a drill having a plurality of drills, a gripped portion which is slidably fitted to the drill near the tip of each drill and which can be disengaged from each other, and A plurality of steady rest bushes without grasped portions, grasped portions respectively coupled to positions near the base end of each drill and a position of one of the steady rest bushes, and can be moved up and down with respect to the base and synchronized with each other A first turret and a second turret which are mounted so as to be rotatable and capable of gripping a gripped portion of each of the drills, and an axis below these turrets being parallel to a drill on the turret, and A headstock supported on the base and driven to rotate by grasping the base end of one drill; a drill slidable on the base in parallel to the axis of the headstock and gripped by the headstock Extends on the axis of the headstock A plurality of supports that can respectively hold the steady rest bushes so as to take the operating position, and a moving device that moves the support stand of the steady rest bush without the gripped portion in parallel to the axis of the headstock. The moving device may be configured such that at one end in the movement range of the support base, the steady bush without the gripped portion is engaged with the steady bush with the gripped portion, and at the other end without the gripped portion. Wherein the steady rest bushing is positioned to cooperate with the steady rest bush with the gripped portion to cause the drill to rest.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a processed part in the gun drill machine. In the figure, (10) is a bed provided on the machine base of the gun drill machine, and a table unit (20) for mounting a work is provided on the bed on the right side in the figure. ing. The table unit (20) is slidably mounted between the workpiece mounting position and the processing position.
A chuck device (21) for fixing the work and a cutting oil receiver (22) abutting on the end of the work are supported.
A central column (30) is provided upright from the bed (10) at a position facing the processing end of the work. A work turret (40) is set up from the bed on the work side of the central column (30), and the guide bush (42) that matches the diameter of the work is moved to the lowest position, so that it is on the same axis as the work. It is made to reach a position. On the left side of the bed (10) in the figure, a side column (50) stands upright from the bed. Side column (50) and center column (3
0), the first face-to-face and on the same axis
Turret (60) and the second turret (70). The first turret (60) and the second turret (70) are integrally connected at their respective central portions by a connecting member to form a tool stocker (80).

First turret (60) and second turret (70)
Are mounted on the lifting units (51) and (31) of the side column (50) and the center column (30), respectively. The lifting motor (52) is attached to the side column (50).
The output of the motor is transmitted to the feed screw (53) to move the elevating unit (51) up and down. The output of the motor (52) is also transmitted to the feed screw (34) of the central column (30) via the transmission shaft (32) and the bevel gear (33), and the lifting unit (31)
Up and down. The lifting unit (51) is provided with a turning motor (54) for rotating the first turret (60), and the rotation of the motor causes the first turret (6) to rotate.
0) and the second turret (70) are rotated synchronously. The turrets (60) and (70) are provided with C-shaped spring clips (61) and (71) that are open radially outward, respectively, on the same circumference, and the desired rotation is achieved by rotation of the motor (54). The spring clip reaches the lowermost position. In the figure, a guide rail (90) is provided on the bed (10) on the left side of the center column (30), and a headstock (100) is mounted on the guide rail. The headstock (100)
It is arranged on the same axis as the work on the table unit (20), and moves forward and backward with respect to the work by the feed motor (91). The headstock (100) is also provided with a spindle motor (101), the output shaft of which is connected to a chuck (102) at the headstock tip. The guide bush turret (40) is supported by a bearing stand (43), and the bearing stand (43) is attached to the bed (10) via a chip shooter (44).
A turret (40) turning motor (4
5) is mounted, and the motor brings the bush of the required diameter to the lowest position via the bush indexing device of the bearing stand (43). Headstock (100) and tip shooter (4
The support device (110) is arranged between the support device and the support device (4). The support device (110) includes three support bases (111a) (111b) and (111).
c). These supports are mounted on guide plates (112) and (113) on the bed (10) as shown in FIG. Guide plate (112) is bed (1
0) It stands up, extends in the axial direction of the headstock, and has two guide rails (114). The supports (111a) and (111b) are fixed to holders (115a) and (115b), respectively, and these holders engage with the guide rail (114) and can slide on the guide rail. . At the end of the guide plate (112) near the headstock, two backward-acting cylinder devices are mounted. The piston of the cylinder device (116a) is connected to the holder (115a), and the piston of the cylinder device (116b) extends through the holder (115a) and is connected to the holder (115b). Guide plate (11
3) is provided horizontally on the bed (10), extends along the axis of the headstock, and has two guide rails (117). The support (111c) is fixed to the holder (115c)
The holder (115c) is engaged with the guide rail (117) and is slidable on the guide rail. Guide plate (11
At the end on the headstock side in 3), a cylinder device (116
c) is provided, the piston of which is connected to the holder (115c). The oil suction / discharge ports in these cylinder devices are connected to a hydraulic device (not shown), and the operation causes the support bases (111a), (111b), and (111c) to reciprocate in the axial direction of the headstock.

FIG. 1 shows a state where the drill (113) is mounted on the first and second turrets (60) and (70) and on the headstock (110). Drill (130) as shown
The end of the headstock is provided with a tapered shank portion (131) to be gripped by the chuck, and a gripped portion (132) is provided adjacent to the inside thereof. On the tip side of the drill (130), the steady rest bushes (140a), (140b), (14
0c) is attached. Central steady rest bush (140
b) is provided with a portion to be gripped (142). The gripped portions (132) and (142) have a disk shape with a groove formed along the peripheral surface, and are accommodated in the spring clips (61) and (71) by expanding the openings thereof. Dimensions.

Next, the steady rest bush and the support stand will be described. As shown in FIG. 3, the steady rest bushes (140a), (140b) and (140c) are connected to a guide part (145) for supporting a bush (143) having an inner diameter in contact with a drill, and are connected to the guide part. Fixed portion (146). The guide portion (145) of the steady bush (140c) supports the bush (143) via a ball bearing (144). A fixing rod (147) extends vertically from the lower surface of the fixing part (146), and a lower end of the fixing rod is an enlarged diameter part (148) having a tapered edge and a large diameter. The fixing rods (147) of the steady rest bushes (140a) and (140c) are directly screwed into the fixing part (146), but the fixing rods (147) of the steady rest bushes (140b) are fixed.
Is connected to the fixing portion (146) via the slide piece (150). The slide piece (150) is guided vertically by a groove provided in the fixing portion (146) and is slidable, and is urged upward by a coil spring (151) in the fixing portion (146). I have. A lower portion of the slide piece (150) extends in the drill axis direction and protrudes from the fixing portion (146), and both ends thereof are hook portions (152) bent upward. A portion of the fixing portion (146) facing the hook portion (152) is cut out to form a step (153). From the fixing portions (146) of the steadying bushes (140a) and (140c), locking pieces (15) extending toward the hook portions (152), respectively.
4) is protruding. The tip of the locking piece (154) has a hook shape bent downward. When the sliding piece (150) is raised as shown in FIG. 3, the hook (152) and the step (153) are raised. ). When the hook portion is clamped, the steady rest bushes (140a), (140b) and (140c) are integrated, and can be separated from each other by releasing the clamp. The support stands (111a), (111b), and (111c) hold the steady rest bushes (140a), (140b),
(140c) has a position corresponding to the position where they are integrated with each other. The supports (111a), (111b) and (111c)
A cylinder (121) having a vertical axis and a plunger (122) are provided. The plunger (122)
The shaft (123) and a flange (1
24) and the tightening ball (12
5). The flange (124) is connected to the cylinder (12
The space formed between 1) and the plunger (122) is divided into an upper chamber (126) and a lower chamber (127), and these chambers are provided with hydraulic oil as shown in FIG. The passage (128) is open. The shaft portion (123) is formed in a cylindrical shape having a through hole in the center, and a plurality of tightening balls (125) are inserted into small holes provided in the wall of the shaft portion (123). Are movable in the radial direction. The diameter near the upper end of the cylinder (121) is enlarged, and the tightening ball (12
5) moves the cylinder (12) as the plunger (122) moves up and down.
It can be moved in the radial direction by moving between the enlarged diameter part of 1) and the normal diameter part. FIG. 4 shows that the steady rest bushes (140a), (140b) and (140c) are lowered and the support base (11
1a), (111b) and (111c) are shown in contact with each other. At this time, the enlarged diameter portion (148) of the fixing rod (147)
It is located directly below the clamping ball (125). When the plunger (122) is lowered by hydraulic pressure in this state, the tightening ball (125) moves radially inward of the plunger (122) to tighten the fixing rod (147).
The upward movement is prevented and the state is fixed. In this state, the slide piece (15) of the steady rest bush (140b) is used.
0) descends together with the fixing rod (147) and disengages the guide rods (140a), (140b), and (140c) from the engagement pieces (154).

Next, the operation of the gun drill machine thus configured will be described. First, drill multiple and different diameter drills
And on the second turrets (60) and (70).
At this time, the steady rest bush (140a), (140b), (140
c) is made integral by the engagement of the slide piece (152) and the locking piece (154). The first and second turrets (6
To attach the drill to (0) and (70),
1) Pass (71) through the spring clips (61) and (71) respectively. Next, the table unit (20) is positioned away from the guide bush turret (40), and the work (A)
Is fixed by the chuck device (21). At this time, the end of the work (A) is brought into contact with the cutting oil receiver (22). The turret (40) is rotated by the motor (45) such that the guide bush (42) suitable for the work (A) comes to the lowest position. In this state, the table unit (20) is moved toward the turret (40), and the end of the work (A) is brought into contact with the guide bush. Turret (60), (70)
Also, the turning motor (54) rotates the drill (130) suitable for the work (A) so that the drill (130) is at the lowest position.
In this state, the elevating motor (52) is rotated to lower the elevating units (51) and (31). Support (111a),
(111b) and (111c) are in the basic position, and receive the lowered fixing rods of the steady rest bushes (140a), (140b) and (140c) as shown in FIG. The steady rest bush uses a hydraulic device (not shown) to supply pressure oil to the cylinder (12
By lowering the feed plunger (122) into the upper passage of 1), the feed plunger (122) is fixed on the support base via the fixing rod (147).

Further, the headstock (100) is advanced, and the taper shank (131) of the drill is gripped by the chuck. Next, when the lifting units (51) and (31) are raised, the spring clips (61) and (71) are disengaged from the gripped (42), and the mounting of the drill is completed.

Next, the headstock is advanced by operating the feed motor (91), and the tip of the drill passes through the tip shooter (44).
It is inserted into the bush guide (42) and reaches just before the work. The hydraulic cylinder device (116a) and the cylinder device (116c) of the support device (110) are operated. Support stand (111a)
Is moved to a position substantially at the center of the drill by the contraction of the cylinder device (116a), and the support base (111c) is moved to the cylinder device (11a).
The extension of 6c) advances the tip shooter (44) to a position to close the opening. FIG. 6 shows a state in which the movement of the support base is completed in this way. Next, the headstock (100) is advanced while operating the spindle drive motor (101) to rotate the drill (130). When the contact portion (103) provided in front of the headstock contacts the contact plate (119) of the support (111a), the hydraulic oil in the cylinder devices (116a) and (116b) is discharged. The support (111a) advances with the headstock. Further, when the support (111a) comes into contact with the support (111b), the support (111b) advances with the support (111a) and the headstock (100). FIG. 8 shows a state in which the processing has been completed in this way. When processing is completed,
The headstock (100) is retracted to the state shown in FIG. The supports (111a) and (111b) are provided with respective cylinder devices (11
6a) and (116b) are contracted to the stroke end and retracted to the position shown in FIG. If the same drilling process is to be repeated for another workpiece, the table unit (20) should be positioned away from the guide bush turret (40), the workpiece (A) should be removed from the chuck device (21), and a new workpiece should be removed. Is attached to the chuck device (21) and brought into contact with the guide bush (42), and then the headstock (10
0) is advanced, and drilling is performed in the same manner as described above.
When the drill is replaced, the operation shifts from the state shown in FIG. 6 to the drill replacing operation. First, the cylinder device (116a) of the support base (111a) is extended so that the support base (111a) is supported.
1b), the cylinder device (116c) is contracted to the stroke end, and the support (111c) is brought into contact with the support (111b). The hydraulic pressure acting on the cylinder device (116a) is made lower than the hydraulic pressure acting on the cylinder device (116b), so that the movement of the support (111b) after the contact of the support (111a) is prevented. Thereafter, the headstock (100) is retracted, and the gripped portion (102) on the drill (130) is set to a position corresponding to the first turret (FIG. 1). Lower the elevating units (51) and (31) and turn the turrets (60), (7
0) on each spring clip (61), (71)
2) Hold (142). With the gripper held, the chuck of the headstock (100) is opened, and the supports (111a) and (111) are opened.
b) The hydraulic oil is pumped into the lower passage (128) of the cylinder (121) of (111c) to raise the plunger (124). Due to this rise, the tightening ball (125) moves to the enlarged-diameter portion of the cylinder (121) and is fixed to the fixing rod (14).
Unlock 7). This allows the steady rest bush (140
The slide piece (150) of b) is lifted by the spring (151), and engages with the locking pieces (154) of the steady rest bushes (140a) and (140c), and the three steady rest bushes are integrally formed. Become. Next, the headstock (100) is retracted, and the first and second turrets (60) and (70) are moved to the ascending position by the lifting units (51) and (31). Rotate according to (54) to bring the drill suitable for the next operation to the lowest position. Thereafter, a new drill is mounted on the headstock in the same manner as described above.

Various modifications can be made to the embodiment described above. For example, the number of steady rest bushes that couple and separate from the steady rest bush (140b) is determined as appropriate according to the length of the drill. In the embodiment, three sets of steady rest bushes are used.
Turrets can be provided in an increased number. If the drill is not very long, it is also possible to use only the steady rest bush (140b). In this case, the steady bushing (140b) is used to insert the tip shooter (44) during drilling.
Is moved to a position to close the opening of.

As means for fixing the steady rest bushing on the support base, in addition to the above-described example, a horizontal through hole is provided in the fixing rod (147), and a pin inserted into the through hole is projected from the support base. Various methods can be adopted. The means for mounting the steady rest bushing on the turret and the means for integrally connecting adjacent steady rest bushes can be variously adopted, such as those using mechanical coupling or magnetic force. Further, in the embodiment, the guide rail for the steady rest bush support is separately provided, but the support can be installed on the guide rail for the headstock.

Effects of the Invention As is apparent from the above, according to the present invention, a gun drill machine having the following effects can be provided. That is, since the drill is moved to the mounting position on the headstock with both ends supported by the first turret and the second turret, the positioning accuracy at the time of mounting is improved. Even after shifting to the mounting position, the drill has one end on the headstock,
The other end is supported by the steady rest bush and the support base, and in this state, the front end can be made to reach the guide bush by the movement of the headstock, so that the mounting to the guide bush can be performed with high accuracy. Then, prior to drilling, the steady rest bush is brought to the position where the drill is rested by the support base, so that bending and deflection of the drill can be effectively prevented. When the drill is replaced, the turret is lowered after the support base is returned to the original position, so that the drill can be transferred onto the turret together with the steady rest bush, and the rotation of the turret enables automatic replacement of the drill. As described above, the gun drill machine according to the present invention realizes the automatic exchange of the drill while ensuring the accuracy required for mounting and processing the drill.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view showing a machined portion of a gun drill machine, FIG. 2 is a perspective view of a supporting device including a supporting table, and FIG. 3 is a steady bush and a supporting table. , FIG. 4 is a vertical sectional front view showing a state in which the steady rest bush is fixed on the support, FIG. 5 is a longitudinal side view mainly showing the steady rest bush and the support, and FIG. 6 is a gun drill. FIG. 7 is a front view of the gun drill machine in the state of FIG. 6, and FIG. 8 is a front view of the gun drill machine showing a state in which the drill is inserted into the work at a predetermined depth. is there. (10) Bed (20) Table unit (30) Central column (31) Elevating unit (40) Turret for guide bush (44) Tip shooter (50) Side column (51) Lifting unit (60) First turret (61) Spring clip (70) Second turret (71) Spring clip (100) Headstock (110) … Supporting device (111a), (111b), (111c) …… Support table (116a), (116b), (116c) …… Cylinder device (130) …… Drill (132) …… Grapped part (140a) , (140b), (140c) ... Drill guide (142) ... Grasped part

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masao Higaki 2-18-1, Inaji, Amagasaki-shi, Hyogo Inside Kanzaki High-Tech Koki Mfg. Co., Ltd. No. 1 Inside Kanzaki High-Tech Koki Mfg. Co., Ltd. (72) Inventor Sei Ishiguro 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Hisashi Suzuki 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Vehicle (56) References JP-A-3-202212 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23B 41/02 B23B 49/02 B23Q 3/155-3 / 157

Claims (1)

(57) [Claims] 1. A plurality of drills, and a plurality of steady rest bushes with and without a gripped portion, which are slidably fitted to the drills near the tips of the drills and which can be disengaged from each other. A gripping portion coupled to a position near a base end of each drill and a position of one of the steady bushings, and attached to the base so as to be able to move up and down and rotate in synchronization with each other. A first turret and a second turret capable of gripping a gripped portion of each of the drills, and one drill supported below the turret with the axis parallel to the drill on the turret and supported by the base. A headstock that is rotatably driven by gripping the base end of the headstock, and is slidable on the base in parallel to the axis of the headstock, and a drill gripped by the headstock extends on the axis of the headstock. The steady rest to take the operating position A plurality of supporting stands each capable of holding a bush, and a moving device for moving the supporting stand of the steady rest bush without the gripped portion in parallel with the axis of the headstock, the moving device includes: At one end in the movement range, the steady bush without the gripped portion is engaged with the steady bush with the gripped portion, and at the other end, the steady bush without the gripped portion is fitted with the gripped portion. A gun drill machine characterized in that it is located at a position where the drill is stopped in cooperation with the steady rest bush.