JP2515217Y2 - Indexing / rotating device for eccentric machining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an apparatus for indexing an eccentric part of a work and performing heat treatment or cutting while rotating the part.

[Conventional technology]

A work such as a crankshaft is provided with a plurality of eccentric pins with different phases at an eccentric portion centered on the journal pin. Therefore, when heat-treating or cutting the eccentric pin, it is necessary to index the eccentric pin, and after this indexing, the eccentric pin is given a rotational motion.

Conventionally, such a rotation source for indexing and a rotation driving source for machining are separately provided, so that the device and its control system are complicated and the device is expensive.

[Purpose of device]

Therefore, an object of the present invention is to index an eccentric part of a work by one driving means and to give a rotary motion for machining to the eccentric part after the index.

[Means for solving the invention]

In view of this, the present invention provides an indexing side frame for rotatably supporting a work between a pair of frames on a bed by a pair of head stockers and tail stockers with a predetermined eccentric amount around a center line. A cylindrical spindle and a central spindle inside the cylindrical spindle are rotatably combined with each other, and a head stocker is rotatable in an eccentric position inside a head provided at the tip of the cylindrical spindle, and a central spindle is provided by an eccentric shaft coupling. And a clamper interposed between the frame and the central spindle, and between the cylindrical spindle and the central spindle, and the cylindrical spindle is driven by one rotation driving means to the other spindle. It is possible to drive with.

[Function of device]

At the time of indexing, the central spindle is fixed to the frame by the clamp means, and the cylindrical spindle is driven in the indexing direction by the drive means. As a result, the work supported between the head stocker and the tail stocker rotationally moves around the center line of the spindle in the indexing direction along the eccentric locus without changing its posture. In this way, the eccentric part of the work is determined.

On the other hand, at the time of heat treatment or cutting after indexing, the driving means integrally rotates the cylindrical spindle and the central spindle integral therewith about the center line. As a result, the work after indexing is ready for heat treatment or cutting by rotating with the eccentric portion positioned on the center line of the spindle.

〔Example〕

1 to 4 show an indexing / rotating device 1 for eccentricity machining according to the present invention.

The eccentric machining indexing / rotating device 1 includes a pair of frames 3 and 4 on a bed 2. As shown in FIG. 2 in addition to FIG. 1, one frame 3 rotatably supports a cylindrical spindle 5 by front and rear bearings 16, and inside the spindle 5, its center is supported. The spindle 7 is rotatably supported on the line by bearings 17 at both ends.

The head 6 is attached to the tip of the cylindrical spindle 5, and the slide sleeve 18 is diametrically movable with respect to the front angle guide surface of the head 6, and a predetermined amount is adjusted by the eccentricity adjusting screw 19. It is attached so that it can be adjusted to the eccentricity of The slide sleeve 18 rotatably accommodates the cylinder 20 therein, and an intermediate shaft 21 integrated with the slide sleeve 18 is connected to the central spindle 7 by an eccentric shaft joint 8 such as a Schmidt coupling. Further, the cylinder 20 supports the head stocker 9 having a predetermined eccentricity with respect to the center line at the piston 22 so as to be able to move back and forth.

As shown in FIG. 3, inside the slide sleeve 18, there is a symmetric position with respect to the head stocker 9.
Two clamp cylinders 23 are integrated with the cylinder 20. The piston rod 24 of this clamp cylinder 23
Is connected to the clamp arm 27 via a link 25 and a connecting pin 26. These pair of clamp arms 27,
The fulcrum pin 28 is attached to a mounting plate 29 integral with the cylinder 20.

As shown in FIG. 2, for example, a hydraulic sleeve-shaped clamper 10 is incorporated between the cylindrical spindle 5 and the central spindle 7, and the flange 31 integral with the frame 3 and the central spindle. For example, a hydraulic sleeve-shaped clamper 11 is incorporated between the clamper 11 and 7. The hydraulic clampers 10 and 11, the cylinder 20 and the clamp cylinder 23 are provided with pressure oil 33 from a hydraulic port 32 formed in the rotary joint 30, the flange 31, the spindles 5, 7, the head 6, the slide sleeve 18, and the like. It is designed to be driven independently.

Next, the other frame 4 is, as shown in FIG.
The spindle 12 is rotatably supported by the bearing 38 on the same center line as the spindles 5 and 7, and the head 13 is supported on the side facing the head 6. The head 13 supports a slide sleeve 40 which also serves as a cylinder so as to be adjustable by an eccentricity adjusting screw 39 by means of an angular guide surface, and an internal piston 41 holds a tail stocker 14 so as to be capable of advancing and retracting. The piston 41 is composed of the rotary joint 35 and the spindle.
12, driven by a hydraulic port 34 formed in the slide sleeve 40, the flange 42, etc., and pressure oil 36.

The spindle 5 and the spindle 12 are located on the same center line, and are both driven by the driving means 15. That is, the drive means 15 transmits the rotation from the motor 43 on the frame 3 side to the drive shaft 46 via the timing belt 44 and the timing pulley 45. The drive shaft 46 is rotatably supported on a pair of frames 3 and 4 by bearings 47, and gears 48 and 49 inside the frames 3 and 4,
The same rotation amount in the same rotation direction is transmitted to the gear 52 of the spindle 5 and the gear 53 of the spindle 12 via the intermediate gears 50 and 51, respectively. The intermediate gears 50 and 51 are supported on the respective frames 3 and 4 by intermediate shafts 54 and 55 and bearings 56 and 57, respectively.

A crankshaft 60 as a work to be processed has a journal pin 61 and an eccentric pin 62. In the case of a 4-cycle 6-cylinder, the eccentric pins 2 of No. 1 to No. 6 are displaced from the journal pin 61 by a predetermined eccentric amount e as shown in a model in FIG. It is formed around 61 with a central angle of 120 ° and different phases.

Therefore, when heat-treating or cutting the crankshaft 60, a pair of head stocker 9 and tail stocker 9 are used.
By adjusting the eccentricity adjusting screws 19 and 39, 14 is set at a position deviated from the center line of the spindles 5 and 7 by the eccentricity e. In this state, the crankshaft 60 is held between the pair of head stockers 9 and tail stocker 14 by the tip portions of the journal pins 61 on both ends, and the clamp arm
Set to stop rotation by 27. Of course, head stocker 9 and tail stocker 14 are piston rod 2
By the forward movement of 4 and 24, the piston rods 60 are driven in a direction to sandwich them. Also, a pair of clamp arms 27
The clamp cylinder 23 generates a clamping force to sandwich the journal pin 61 with a strong diametrical force.

In the initial clamped state, No. 1, 6 as shown in FIG. 5A
It is assumed that the eccentric pin 62 of No. 2 coincides with the center line of the spindles 5, 7, 12 and then when the eccentric pins 62 of Nos. 2 and 5 as eccentric parts are indexed, hydraulic pressure is sent to the clamper 11,
While fixing the central spindle 7 to the frame 3,
With the other clamper 10 in the unclamped state, the motor 43
Is rotated at a low speed, and the drive means 15 rotates the cylindrical spindle 5 clockwise by an angle of 120 ° required for indexing. As a result, as shown in FIG. 5B, the crankshaft 60 moves along the eccentric locus by the central angle of 120 ° without changing its posture. Therefore, the eccentric pins 62 of Nos. 2 and 5 are indexed on the center lines of the spindles 5, 7 and 12. After the indexing is completed, the clamper 10 is unclamped and the clamper 11 is hydraulically clamped to integrate the cylindrical spindle 5 and the spindle 7 at the center thereof. In this state, the motor 43 is rotated at a speed suitable for heat treatment or cutting, and the spindles 5, 7 and the spindle 12 are integrally rotated. At this time, the crankshaft 60 rotates about the eccentric pins 62 of No. 2 and 5 after indexing. Therefore, during this rotation, the outer peripheral portions of the eccentric pins 62 of Nos. 2 and 5 are in a state capable of being heat-treated or cut.

Even when heat-treating or cutting the other eccentric pins 62 of No. 3, 4 and No. 1, 6, the motor 43 of the drive means 15 indexes the crankshaft 60 and rotates the eccentric pin 62 after indexing. Are carried out in sequence.

[Other Examples]

In the above embodiment, the head stocker 9 and the tail stocker 14 can be moved forward and backward in terms of operability, but one of these can be fixedly installed instead of being moved forward and backward.

Also, these head stocker 9 and tail stocker 14
Is not limited to the center type, but may be a taper key type, a cam lock type, or a flange type, like the main spindle end of a normal lathe.

[Effect of device]

According to the present invention, rotary indexing and rotary motion for heat treatment or cutting are performed by selectively switching a clamp between a central spindle and a frame and a clamper between a cylindrical spindle and a central spindle. Can be selected, and since the rotary motion for rotary indexing and machining can be obtained by one driving means,
And the structure can be simplified. In addition, since switching between rotary indexing and rotary motion can be easily set by switching the clamper, the switching control is easy.
Operability is also improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an indexing / rotating device for eccentric machining, FIG. 2 is a vertical sectional view of the inside of one frame, FIG. FIG. 5 is a vertical sectional view of the frame portion, and FIG. 1 ... Indexing / rotating device for eccentricity processing 2 ... Bed,
3, 4 ... Frame, 5 ... Spindle, 6 ... Head, 7 ... Spindle, 8 ... Eccentric shaft joint, 9 ... Head stocker, 10, 11 ... Clamper, 12 ... Spindle,
13 …… Head, 14 …… Tail stocker, 15 …… Drive means, 19, 39 …… Eccentricity adjustment screw.

Claims (1)

(57) [Scope of utility model registration request] 1. A pair of frames (3, 4) provided on a bed (2), a cylindrical spindle (5) rotatably supported by one frame (3), and this cylinder. Head (6) attached to the tip of a spindle (5)
A central spindle (7) concentrically and rotatably supported inside the spindle (5), and an eccentric shaft joint (8) rotatably provided at an eccentric position in the head (6) for spindle (7). ) Connected to the head stocker (9),
The clamper (10) interposed between the spindle (5) and the spindle (7), the frame (3) and the spindle (7)
A clamper (11) interposed between the spindle (12), a spindle (12) rotatably provided on the other frame (4) on the same center line as the spindles (5, 7), and a tip of the spindle (12). The head (13) attached to the head (13), the tail stocker (14) attached to the head (13) at a position facing the head stocker (9), and the spindle (5, 1).
An indexing / rotating device (1) for eccentricity machining, characterized by comprising a driving means (15) for rotating 2).