JPS5937005A - Positioning means for processing work in position in device for replacing work - Google Patents

Abstract

PURPOSE:To position a work which is coaxially held to a work arbor and is secured thereto, in a predetermined working position. CONSTITUTION:A common work arbor 16 onto which a work is attached, is fitted into the chuck 13 of a work spindle 4 and an arbor storing part 26a on a work magazine 26, and therefore, no change is necessary to the chuck 13 and as well the arbor storing part 26a on the work magazine 26. There is no need of centering since the work is supported by the work arbor 16, and is processed in such a condition that the work is grasped by the chuck 13 of the work spindle 4. The positioning of the work in a processing position of a desired work part, may be previously made on a work replacing device, and therefore, the work may be fed to an automatic and continuous working area.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for positioning a workpiece fixed to a work arbor at a predetermined processing position by holding the workpiece.

In particular, the present invention automatically and continuously transports and unloads workpieces intended for hole machining and milling of round and initial parts into a processing area, and adds new liquid to the processed workpieces.
- It relates to a workpiece positioning device installed in a workpiece exchange device for exchanging objects.

Conventionally, when machining a workpiece in which the f-force location on the workpiece cannot be arbitrarily selected using a machining center or a similar complex machine, for example, as shown in FIG. 4 of the embodiment, In order to machine the apex of a workpiece with a large oscilloscope shape, or to machine a certain part of the workpiece relative to a certain reference position, it is necessary to insert the machined part of the workpiece relative to the processing position.゛Specific positioning method (=I)
The workpiece must be mounted on the work table in advance using a jig. However, designing such a mounting jig for positioning a processing location on a workpiece requires considerable skill and high machining ability. In addition, it is necessary to design a jig each time the workpiece changes, resulting in a considerable loss in setup time, which becomes even more so when a large number of workpieces are processed.

In the present invention, without using such a workpiece mounting jig, the required workpieces can be mounted on a secondary workpiece changer that automatically and continuously carries the workpieces into the processing area. The purpose of this system is to install a simple positioning means to position the machining part of the workpiece in a fixed position, so that the required machining part of the workpiece can be machined in a fixed position, and also to reduce the time required for setting up and changing the workpiece. be.

Hereinafter, the present invention will be explained based on one embodiment drawing.

(1) is a rotary tool for a machine tool that performs milling or hole drilling, etc., and is mounted on a tool support member (2) such as a turret or spindle slide.
5) It is supported on the top and sent to the processing position by a feed table (not shown) which is controlled by numerically controlled axes of the X, Z and Y axes. (4) is a work spindle rotatably supported by a spindle head (5) provided on the machine tool, and a work spindle is placed at any rotational angle position on the rotational axis of the work spindle (4). (4) It has an O-axis numerically controlled axis for index rotation and positioning.

The indexing rotation of the work spindle (4) is achieved by a worm wheel (6) fixed to the work spindle (4), which engages with the worm wheel (6), and which is provided on the spindle head (5). This is done by transmission of a worm (9) which operates via a hydraulic motor (8).

Further, positioning of the required rotation angle of the work spindle (4) is performed using the work spindle /l/(positioning plate (1[, l) provided on the workpiece spindle (41) and the positioning plate) (10).
A dividing groove (1u
In a), seven dowel pins (12a) 75 provided on the pinuton rod θ2) reciprocating within the fluid cylinder (11) provided on the spindle head (5) engage and hold the position. The work spindle (4) is provided with a chuck 03) for gripping a work arbor, which will be described in detail later, and the chuck (16) is attached to the piston of a chunk cylinder (14) fixed to the rear of the work spindle (4). The chuck (13) is connected to an actuating tube (15) which operates through the actuating tube (15), and the relative movement of the actuating tube (15) causes the chuck (13) to relax. (16) is a work spin that is held by the chuck (13) of the work spindle (4) and is detachably held in the work magazine of a work magazine device which will be described in detail later, and the shank is held by the chuck (13). (1φa), and a retaining part (16(3)) having an annular groove (16b) on the outer periphery, which is housed in the arbor storage part on the work magazine in the center of the second part (1φa), which is coaxial with the toma. a locking part (16C1) cut out in the axial direction of the work arbor (16) in the part (160) l;
The arbor head (1
6e), in which a round workpiece is held in flower and removed from the arbor head (16e).

The following method is used to remove the workpiece on the aper head (16e) 1:J. In the case of a workpiece having a hole in the center of the shaft, a spacer ( 17) '(f Prepared by turning in advance, and attaching the workpiece to the arbor head (16e) via the spacer (17).
) The workpiece is placed on the workpiece by tightening the bolt (19) screwed onto the end face of the arbor head (t6e) from the outside of the washer (18) that sandwiches the workpiece. cent.

Even if the inner diameter hole of the workpiece changes, the new spacer (1
7) and follow the above-mentioned procedure, it is possible to easily mount the workpiece. By doing so, even if the workpiece changes, the work arbor (16) can be used in common by simply changing the spacer (171).

Since the work arbor (16) is JJ2 for various workpieces, it is necessary to change the work spindle setup or change the arbor storage section that stores the work arbor (16) on the work magazine device, which will be described later. It's necessary. (20) is a workpiece magazine device (Z) (hereinafter referred to as the device main body) installed in parallel with the spindle head 5) that rotates and axially parallels the rotational axis of the workpiece spindle (4). The operating shaft (20) is reciprocally movable (supported by this), and the operating shaft (20) is connected to the main body of the device (the hydraulic motor (2), which is equipped with The required rotation angle can be indexed around the operating axis by power transmission, and the feeding operation can be performed in the direction of the operating axis by operating a hydraulic cylinder (25) provided in place of one of the operating shafts (20). The workpiece arbor (16) is fixed to the operating shaft (20) and fully rotated around the operating axis, in a direction transverse to the rotational axis of the workpiece spindle (4). The work magazine (27) is indexed on the rotating shaft axis of the work arbor (16)'t workpiece nubindle (4) every time machining is performed using a work magazine that can be freely rotated. A positioning fluid cylinder that determines the position, and a positioning member (29) in which seven dowel pins (28 to 28) provided on a piston rod (28) that moves forward and backward in the fluid cylinder (27) are fixed to the operating shaft (20) l. It can be freely engaged with dividing grooves (29a) having a number corresponding to the number of divisions provided in the work magazine (26) which crosses the rotational axis of the work spindle (4).
Each arbor storage part (26a
), the outer periphery of the workpiece storage part (16) is removably held together with the workpiece. The work arbor (16) located on the rotational axis of the work spindle (4) is held by the chuck (13) of the work spindle (4) and has a relationship with the arbor storage part (26ε) even during machining. There is. Each arbor storage section (26a) on the work magazine (26)
) is formed with a half-moon-shaped resting part (26α) that engages with the annular groove (16b) provided in the retaining part (16c) on the workpiece arbor (16) from the lateral direction of the workpiece storage part (16). This prevents the work arbor (16) from moving in the axial direction. (60) is a gripping means for gripping the outer periphery of the arbor engaging part (1) on the workpiece storage part (2 (6)), and the arbor storage part (26a) can be pivoted in the direction of closing the opening of the arbor storage part (26a). (26a). (Port 1) is a plunger disposed around the arbor storage part (2 (8)) so as to be movable forward and backward against a compression spring (32). The head of (31) presses the - piece of the gripping means (30) and restrains the gripping of the Arno (work arbor 06 on the storage part (26a)).The processed workpiece is held by the gripping means (5D) )
By operating automatically or automatically, you can replace it with a new workpiece and install it in the arbor storage part (:zaJl).

Workpieces whose processing location cannot be arbitrarily selected on the workpiece are automatically and continuously carried into the processing area using the workpiece changing device that constitutes the present invention. In this case, some kind of positioning means is required so that the machined part of the workpiece is located at a desired predetermined position at the processing position. In the present invention, in order to solve this problem, the above-mentioned positioning means is mounted on the workpiece changing device. As a specific example of the positioning means, a ratchet method is used, and the arbor storage part (2
The locking pawl (63) pivoted around the spring (54)
It has a structure in which the work arbor (16) is connected to the work arbor (+6C1) through the work arbor (11-).
(=1 procedure, the machining location of the corrugated workpiece and the work arbor (1)
After installing the workpiece on the work arbor (Is) by keeping the relative position in the machining position with the part 11 (16d-) of 6) constant using a simple jig, the workpiece is mounted on the work arbor (Is). When attaching the corrugated workpiece to the work arbor (16) on the workpiece arbor (16), operate the locking claw (63) and attach the claw (33) to the workpiece storage section (k) on the workpiece storage section (16) (06d).
and lock it. Therefore, in order to better understand the above matter, when first machining one location (A) of six vertices equally spaced on the same circumference as shown in Fig. 4, the machining location of the workpiece is Next, how to position the machining position will be briefly explained.

In the present invention, as described above, the Y-axis, C and II which control the rotation angle of the Y-axis and the Y-axis and the work spindle (tI-)
Assume that the above-mentioned processing is performed using a machine tool that is controlled by four control axes including IJl+ and is capable of drilling and milling a workpiece.

In this case, X and z'Ii+I+ are the control axes that govern the feed direction (Y-axis and Z-axis direction) of the rotary tool (1), which is the working tool, and the Y-axis is , 317
When the control axis of the spindle head (5) is vertical to the plane (Y-axis direction), the center of the corrugated workpiece is aligned with the rotation axis of the rotary tool (1). Intersecting X
, When machining is performed using the Y-axis and the Y-axis control axis with the Y-axis control axis fully stopped, the machining location of the corrugated workpiece must be The center intersects the x, Z plane that intersects the rotational axis of the rotary tool (1), and at that position the engaging 1F section (+61
) and the locking pawl (33) can be easily aligned in the manner described above by designing a jig that shows the relative positional relationship in the engaged state. When the positions are aligned, machining of the other two vertices can be performed by indexing the C-axis control axis and feeding the X-axis and Z-axis control axes. c l
Each time l1l indexes, the locking pawl (33) engages the work arbor (
16), and is again engaged with the locking portion (16d) at the next processing position to be positioned at a predetermined processing position. (35) is the workpiece. The configuration of the present invention has been described above. Next, the operation of the workpiece changing device constituting the present invention and the effects of the present invention will be described below. Prior to machining, the work arbor (16) l of the workpiece to be machined is previously positioned outside the machine, as is the case with several desired machining locations of the workpiece in fixed position machining.

This point has been described in detail above.

In preparation for machining, the work magazine (2
S) Work arbor (1
6), the workpiece is set, and preparations for starting the machine are completed. When the machine starts, first, the hydraulic cylinder (25
) is actuated and the operating shaft (20) moves forward in the direction of the arrow shown in FIG. 1, the work magazine (26) moves toward the chuck (16) along the rotational axis of the work spindle (4). With this operation, the work arbor (16), which is held in the storage section (2) located on the axis of rotation (2), moves forward to the position where it is attached to the chuck (16), and the work magazine (26) stops. Next, the chuck cylinder (
14) is activated and the chuck (13) is activated via the actuating pipe (15).
) grips the tightening work arbor (16). Machining starts at the end of this operation, and the rotary tool (1) is sent to the processing position of the workpiece by the feed operation of the feed base controlled by the control axes of the X, Z, and Y axes. Machining can be performed on the front surface of the workpiece facing the rotation axis direction (1) or on the outer periphery of the workpiece in a direction transverse to the rotation axis (1) of the rotary tool. When drilling two or more holes at a certain rotation angle on the rotational axis of the work spindle (4), after drilling one hole, move the work spindle (4) to the second hole drilling position. Through the indexing operation, the workpiece is indexed to the machining position where the rotary tool is located at an angle corresponding to the required rotation angle, and machining is performed in the same steps as in -I-. Even when the workpiece is being machined, the work arbor (16) is in the work bin: / (26)
It is supported by the arbor storage part (26a).

When a series of machining is completed, the chuck (151) of the work spindle (4) loosens, and after this operation, the hydraulic cylinder (2
5) is activated again and the operating shaft (20) is moved back, thereby opening the arbor storage section (260) on the work magazine (26).
The work arbor (16) supporting the machined workpiece held in the chuck (15) moves away from the chuck (15) and retreats to a predetermined standby position. After this retraction, the operating shaft is indexed through the transmission of the worm (23) and worm wheel (24) by the operation of the hydraulic motor (22), and through this operation, the work magazine (26) is moved to the work spindle (
4) is rotated toward the rotation axis, and the workpiece to be processed next is indexed onto the rotation axis.

The machined workpiece is already held on the workpiece magazine (26) away from the axis of rotation.

The subsequent operations repeat the above-mentioned operations, and the machine stops when all the workpieces held on the work magazine (75) have been processed. After this stop, the workpiece magazine (26) is removed from the workpiece magazine (26) and the arbor storage section (2 (c)), and the workpiece is removed from the workpiece magazine (26).
(16) All work is completed by loosening the upper bolt and removing the workpiece.

From the above, in the present invention, even if there is a change in the workpiece without installing a large jig, several workpieces can be placed on a common workpiece arbor (16) and the workpiece spindle (4
) chuck (13) and work magazine (26) l
By attaching it to the arbor storage part (260), the chuck (
13) as well as the arbor storage section of the work magazine device (
Since the workpiece is supported by the work arbor and gripped by the chuck of the workpiece bin F/2, the core 111) is not required, and the desired machining location of the workpiece is The machining and positioning at γ position are
Because it is done in advance on the workpiece changing device,
Workpieces can be automatically and continuously fed into the processing area.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the device of the present invention, and FIG.
A partially cutaway view shown from the arrow line A in the figure, FIG. 3 is a sectional view showing the attachment relationship between the work arbor and the workpiece, and FIG.
FIG. 3 is a diagram showing a positioning relationship at a processing position of a desired processing location on a workpiece. Patent applicant Miyano Iron Works Co., Ltd.

Claims (1)

[Claims] zt on the rotational axis of the workpiece spindle, which can be indexed to a required rotational angle on the rotational axis of the workpiece spindle.
A work magazine that rotates in the transverse direction and feeds the workpiece in the opposite direction around the axis.Secondly, a soak arbor that securely supports the workpiece is removably held, and Through movement
In the machine for exchanging broken eggs, which is indexed along a line and gripped by the chuck of the workpiece bin I'/l/, a locking portion provided on the workpiece arbor and a required force for resetting the workpiece 10 are provided. 1 of the 2 points: Fix the workpiece to the work arbor while keeping the J position constant, and set the positioning means provided on the above-mentioned locking part of the work arbor and the work magazine to lock 1. Positioning means for fixed-position machining of a workpiece in a workpiece changer for positioning a required machining location of the workpiece.