JP2511830Y2 - Chuck device for processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a chuck device of a processing machine that mainly processes an axial work such as a camshaft.

[Conventional technology]

When a shaft-shaped work such as a conventional camshaft is processed by a processing machine, both ends of the work a are supported by a center c provided on the main shaft b as shown in FIGS. 10 and 11, and one end of the work a is supported. Is clamped by a chuck d to rotate the work a.

Further, the chuck d is provided with a positioning pin e protruding therefrom, and the positioning pin e is inserted into a knock hole f provided on the end face of the work a to perform phase positioning of the work a.

[Problems to be solved by the device]

In the conventional chuck device described above, since the positioning pin e is fitted into the knock hole f of the work a when the work a is processed, when the work a is processed and the work a is unloaded, the work a is first moved in the longitudinal direction. It is necessary to move the knock hole f of the work a through the positioning pin e and then carry it out of the processing machine by the work carry-in / carry-out device, which makes the work carry-in / carry-out device for carrying in / out the work a complicated and expensive. At the same time, since it takes time to carry in and out the work a, there are problems such as poor work efficiency.

The present invention has been made for the purpose of improving the above problems, and an object of the present invention is to provide a chuck device for a processing machine that can easily carry in and out a work.

[Means and Actions for Solving the Problems]

In order to achieve the above object, this invention supports both ends of a work to be processed by a center provided in a chuck body, and inserts a positioning pin into a knock hole provided on the end face of the work to make the phase of the work. In a processing machine that clamps both ends of the work with the claws in the state where the positioning is performed, and synchronously rotates each chuck main body to process the work, the center provided in the chuck main body is
It is movable in the longitudinal direction of the work, and is equipped with work braking means near the work that stops rotation of the work during phase positioning of the work. By rotating the main shaft in the stopped state, the positioning pin provided on the chuck body can be inserted into the knock hole of the work, so that the phase positioning of the work can be reliably performed in a short time.

Further, since the positioning pin can be inserted into and removed from the knock hole of the work by moving the center back and forth when carrying in and out the work, it is possible to automate the loading and unloading of the work and the phase positioning.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS.

In the figure, 1 is a processing machine, and two spindle heads 2 and 3 are provided on a bed 1a so as to face each other. The spindles 2a and 3a provided on these spindle heads 2 and 3 are spindle motors 4 respectively.
Is rotated by the drive system 4a.

Chuck bodies 5 and 6 are attached to the ends of the main shafts 2a and 3a facing each other.

Of the above chuck bodies 5 and 6, the left chuck body 5 is provided with a holder 5a at the center as shown in FIG. 2, and a center for supporting one end of the work 7 on the holder 5a.
5b and a positioning pin 5c which is fitted in a knock hole 7a formed in the end surface of the work 7 to position the phase of the work 7 are provided, and the center 5b is provided so as to pass through the center of the spindle 2a. It is connected to one end of the center drive shaft 8.

The other end of the center drive shaft 8 is connected via a rotary joint 10 to a center drive cylinder 9 installed on the rear end side of the main shaft 2a.

The rotary joint 10 has a sleeve 10a as shown in FIG.
The sleeve 10a accommodates the moving element 10b which is prevented from rotating.

The mover 10b is movable in the axial direction of the sleeve 10a, and the rear end of the center drive shaft 8 is supported by the mover 10b via a bearing 10c, and the mover 10b moves inside the rear end of the sleeve 10a. A compression spring 10d for urging the child 10b toward the center 5b is housed, and a piston rod 9a of the center drive cylinder 9 is connected to the rear end of the sleeve 10a. It can move in the axial direction of the main shaft 2a.

Further, in the chuck body 5, three claw bodies 5d are provided in the radial direction.

The outer ends of these claws 5d are in contact with the inclined surface 5f of the operating rod 5e, and the clamp drive unit provided on the rear end side of the main shaft 2
11 through the clamp drive shaft 12 to connect each operating rod 5e to the main shaft 2
By driving the claw bodies 5d toward the center of the chuck body 5 by driving in the axial direction, the ends of the work 7 supported by the center 5b are clamped.

On the other hand, the chuck body 6 provided on the right side also has a holder 6a at the center as shown in FIG. 4 similarly to the chuck body 5, and a center 6b for supporting the other end of the work 7 is provided on this holder 5a. It is provided.

The base end of the center 6b is connected to one end of a center drive shaft 14 provided so as to penetrate the center of the main shaft 3a, and the other end of the center drive shaft 14 rotates as shown in FIG. It is connected to a center drive cylinder 15 via a joint 13, and the center drive cylinder 15 allows the center 6b to move in the axial direction of the main shaft 3a.

The chuck body 6 also has a pawl 6d that is moved in the central direction by a clamp drive unit 16 provided on the rear end side of the main shaft 3a via a clamp drive shaft 18 and an operating rod 6e.

Next, the operation will be described with reference to FIGS. 6 to 9. When the work 7 is carried in, the centers 5b and 6b are retracted by the center drive cylinders 9 and 15 as shown in FIG. 6 to 9 show only the chunk body 5 and the center drive cylinder 9 on the left side, and the chuck body 6 and the drive cylinder 15 on the right side are omitted).

Next, in this state, the work 7 is carried in between the chuck bodies 5 and 6.

At this time, a gap A ₀ is formed between the end surface of the work 7 and the tips of the positioning pins 5c and 6c, and a gap A ₁ is formed between the tips of the centers 5b and 6b and the tip of the work 7.

When the work 7 has been loaded, the center drive cylinder 9,
15, the centers 5b and 6b are moved to the work 7 side by A ₁ as shown in FIG.

As a result, the tips of the centers 5b and 6b are fitted into the center holes 7b on the end face of the work to support both ends of the work 7. Thereafter, the left center drive cylinder 9 is stopped, and the right center drive cylinder 15 further advances the center 6b.

A compression spring 10d is provided in the rotary joint 10 that connects the center drive cylinder 9 on the left side and the center drive shaft 8, but in the rotary joint 13 that connects the center drive cylinder 15 and the center drive shaft 14 on the right side. Since there is no compression spring, and the pushing force of the center drive cylinder 15 is set to be larger than that of the compression spring, the work 7 is pushed to the left by the forward movement of the center 6b by the center drive cylinder 15, which is shown in FIG. Thus, the compression spring 10d is compressed, the positioning pin 5c is fitted into the knock hole 7a of the work 7, and the work 7 is phase-positioned.

At this time, the spindles 2a and 3a are rotated while the rotation of the work 7 is stopped by the work braking means 17 shown in FIG. 1 to perform the phase indexing of the work 7.

When the phase positioning of the work 7 is completed as described above, both ends of the work 7 are clamped by the claws 5d and 6d in the chuck bodies 5 and 6, and the work 7 and the work 7 are synchronized with the synchronous rotation of the spindles 2a and 3a.
Is rotated to process the work 7.

Further, when the machining of the work 7 is completed, the center 6b is moved backward by the center driving cylinder 15 on the right side while the center 6b is moved by the center driving cylinder 9 on the left side as shown in FIG.
As the positioning pin 5c is disengaged from the knock hole 7a of the work 7 by advancing, the work 7 may be carried out by a work loading / unloading device (not shown) in this state.

[Effect of device]

As described in detail above, the present invention provides a work braking means in the vicinity of a work whose both ends are supported by a center, and rotates the main shaft while the work is stopped by the work braking means to provide the work piece with a chuck body. Since the phase determining pin is inserted into the knock hole of the work, the work does not rotate when the main shaft is rotated.

As a result, the positioning pin can be inserted into the knock hole of the work by rotating the main shaft almost once,
Workpiece phase positioning can be performed reliably in a short time,
Since the positioning pin can be inserted into and removed from the knock hole of the work by advancing and retracting the center at the time of carrying in and out the work, it is possible to automate the loading and unloading of the work and the phase positioning.

After the work is positioned, the chuck clamps both ends of the work while supporting both ends of the work at the center, so the center of rotation of the work does not shift when clamping the work, which enables highly accurate machining. .

Furthermore, on the side of the work loading / unloading device that carries in / out the work,
Since a structure for moving the work in the longitudinal direction is not required, the structure of the work loading / unloading device is simple and inexpensive, and even if the length or shape of the work can be changed, a general-purpose work loading / unloading device is adopted. Yes, it is economical.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a working machine according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a chuck body on the left side, and FIG. 3 is an enlarged cross-sectional view near the center drive cylinder. FIG. 5 is an enlarged cross-sectional view of the chuck body on the right side, FIG. 5 is an enlarged cross-sectional view of the vicinity of the center drive cylinder, FIGS. 6 to 9 are operation explanatory views, and FIGS. 10 and 11 are conventional explanatory views. is there. 5 and 6 are chuck bodies, 5b and 6b are centers, 5c is a positioning pin, 5d and 6d are claws, 7 is a work, and 7a is a knock hole.

Claims (1)

(57) [Scope of utility model registration request] 1. A chuck body is provided on both ends of a work 7 to be processed.
5 and 6 are supported by centers 5b and 6b provided inside, and a positioning pin 5c is fitted into a knock hole 7a provided at the end surface of the work 7 to perform phase positioning of the work 7 and then the pawl 5
In a processing machine that clamps both ends of the work 7 with d and 6d and synchronously rotates each chuck body 5 and 6 to process the work 7, the centers 5b and 6b provided in the chuck bodies 5 and 6 are A chuck device for a processing machine, which is movable in a longitudinal direction of a work 7 and is provided with a work braking means 17 for stopping rotation of the work 7 during phase positioning of the work 7 near the work 7.