JPH06143018A - Mounting mechanism of pin miller cutter - Google Patents

Abstract

PURPOSE:To facilitate attachment/detachment of a pin miller cutter, and to extend the life of each member. CONSTITUTION:Teeth 19, 21 are provided at an equal interval on the outer peripheral part of a pin miller cutter 5 in the circumferential direction. A tooth 23 biting into the teeth 19, 21 is provided on the inner circumferential part of a cutter mounting part 7 in the circumferential direction. An engagement member 24 for pressing a tooth 21 of the notch of the pin miller cutter 5 at its proceeding point, is provided on the cutter mounting part 7 so that the engagement member 24 can move forward and backward. A guide groove 31 to be fitted in a guide pin 26 of the engagement member 24 is provided on a fixed member 28 to be guided by a protruded piece 29 for guiding of the cutter mounting part 7, and the engagement member 24 is moved forward and backward by rotating the fixed member 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin mirror cutter attaching mechanism for attaching and detaching a pin mirror cutter for machining a crankshaft of a reciprocating internal combustion engine to a cutter attaching portion provided on a processing machine. In particular, the present invention relates to a pin mirror cutter attachment mechanism suitable for automatically performing attachment / detachment / replacement of a pin mirror cutter.

[0002]

2. Description of the Related Art Conventionally, as a tool for machining a crankshaft of a reciprocating internal combustion engine, for example, there is a pin mirror cutter as shown in FIG. This tool is detachably attached to an inner peripheral portion of an annular main body 1 by a bolt 4 in a state in which a plurality of chips 2 have respective cutting edges 3 protruding from the inner peripheral surface of the main body 1. Then, as shown in FIG. 9, the pin mirror cutter 5 is attached to a cutter attaching portion 7 provided on the processing machine 6 with its axis aligned with the main shaft (not shown). A crankshaft (not shown) is laid across the inner cavities of the pin mirror cutter 5 on the chucks 9 and 10 provided in the processing machine 6 (see FIG. 10). Then, during driving, the pin mirror cutter 5 rotates in a fixed direction around its own axis by the main shaft (see FIG. 8).
In the direction of arrow A), and the crankshaft is appropriately moved relative to the pin mirror cutter 5 in the axial direction, the radial direction, and the circumferential direction. It is designed to be processed into a predetermined shape by the blade 3.

By the way, such a pin mirror cutter 5 is used.
In the method of machining a crankshaft using, the coaxiality between the axis of the pin mirror cutter 5 and the rotation axis of the main shaft of the machine greatly affects the machining accuracy. Therefore, as shown in FIGS. 8 and 9, the cutter mounting portion 7 of the processing machine 6 is formed with an annular recess 11 coaxial with the main shaft, and the flange 12 is formed on the outer peripheral portion of the main body 1 of the pin mirror cutter 5. Then, these are fitted to each other, and further, four key members 13 (one of which is omitted in the drawing) protruding from the wall surface 11a are arranged on the wall surface 11a of the recess 11 facing the radial center side. . These key members 13 are arranged at 90 ° intervals in a cross shape, and when viewed in a plan view from the axial direction of the recess 11,
The respective width-direction center lines m are accurately positioned so that they intersect at the radial center P of the recess 11 and are fixed by the bolts 14. On the outer peripheral portion of the main body 1 of the pin mirror cutter 5, a key groove 15 having the same width as the key member 13 is formed in the same arrangement as the key member 13, and the key member 13 and the key groove 15 are fitted to each other. This restrains the radial movement of the main body 1 with respect to the concave portion 11 to increase the coaxiality.

With the above structure, the main body 1 is mounted on the cutter mounting portion 7 with its axis aligned with the axis of the recess 11, and then the bolt 16 is mounted on the main body 1 and screwed to the bottom surface of the recess 11. Then, the attachment of the pin mirror cutter 5 to the processing machine 6 is completed.

[0005]

If the mounting mechanism of the pin mirror cutter 5 has the above-described structure, a plurality of bolts 16 must be provided in the circumferential direction, and therefore all the bolts are attached and detached. It takes a considerable amount of time, and the efficiency of cutter attachment / detachment work is extremely poor. Moreover, this drawback has been a major obstacle especially when the attachment / detachment of the pin mirror cutter 5 is automated. That is, as long as the configuration in which the bolt 16 is used is adopted, in order to achieve the automation of the cutter attachment / detachment, the bolt 16 has to be operated by a mechanical tightening means, but when a plurality of bolts are sequentially tightened by one tightening means. However, since tightening each bolt 16 at a time causes a force imbalance, it is necessary to tighten each bolt 16 alternately and gradually. Therefore, it is inevitable that the control becomes complicated and the cycle time becomes long. On the other hand, when the fastening means is provided by the number corresponding to the number of the bolts 16, the cycle time can be shortened, but the installation cost and space of the machine significantly increase. Further, when the cross key 13 is used, a rotational load is mainly applied to the connecting members such as the cross key 13 during cutting driving, so that there is a problem that the life of these connecting members is short.

In view of the above problems, the present invention makes it easy and easy to attach and detach the pin mirror cutter to and from the processing machine,
An object of the present invention is to provide a mounting mechanism for a pin mirror cutter capable of easily realizing automation of attachment / detachment work.

[0007]

A pin mirror cutter mounting mechanism according to the present invention allows a pin mirror cutter having an annular shape and having cutting edges arranged on an inner peripheral portion thereof to be attached to and detached from a cutter mounting portion of a processing machine. In the mounting mechanism of the pin mirror cutter to be mounted, the first teeth are circumferentially arranged at equal intervals on the outer peripheral portion of the pin mirror cutter, and the first teeth are arranged at equal circumferential intervals on the inner peripheral portion of the cutter mounting portion. A second tooth capable of meshing with the first tooth, and a locking member which is mounted on the cutter mounting portion so as to be capable of advancing and retreating in the radial direction and which locks both teeth at the advanced position with the first tooth and the second tooth meshing with each other. , And a fixing member for controlling the advance / retreat of the locking member. The first tooth and the second tooth form a hearth coupling. In addition, the guide pin provided on the locking member is slidably fitted in the guide groove formed on the fixed member that is rotatable along the outer periphery of the cutter mounting portion, so that the fixed member can rotate. The locking member moves forward and backward in conjunction with each other. Also, a plurality of locking members are arranged at equal intervals.

[0008]

When the locking member is slid to the advanced position by the fixing member with the first tooth of the pin mirror cutter meshing with the second tooth of the cutter mounting portion of the processing machine, the first member is moved by the locking member. The tooth and the second tooth are engaged with each other, and the attachment of the pin mirror cutter is completed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS.
However, the same reference numerals are used for the same parts or members as those of the above-described conventional technique, and the description thereof will be omitted. Figure 1
2 is a plan view of the pin mirror cutter, FIG. 2 is a central cross-sectional view of the pin mirror cutter, FIG. 3 is a rear view of a main part of the state where the pin mirror cutter is attached to a cutter mounting portion of a processing machine, and FIG. 4 is A of FIG.
-A line sectional view, FIG. 5 is a BB line sectional view of FIG. 3, FIG. 6 is an enlarged view showing the forward / backward position of the locking member of FIG. 3, and FIG. 7 is between the cutter attachment portion and the locking member of FIG. 3 is a cross-sectional view taken along line CC of FIG.

1 to 3, the outer peripheral portion of the pin mirror cutter 5 is formed as a step portion 18, and coupling teeth 19 are circumferentially arranged at equal intervals along the outer peripheral edge portion thereof. , Each tooth 19 is raised in a trapezoidal shape (see FIG. 4). Further, a plurality of notches 20 are formed on the outer peripheral edge portion of the pin mirror cutter 5 at appropriate equal intervals, and therefore, one tooth for coupling in this area (which is indicated by reference numeral 21) is not provided. Tooth 2 smaller than tooth 19 and shown in FIG.
A concave portion 21a is formed on the bottom surface of No. 1, and an inclined surface 21b is formed so that the thickness of the tooth 21 becomes thinner toward the outer edge portion thereof. Processing machine 6 to which the pin mirror cutter 5 is attached
A circular step portion 22 is formed on the cutter attachment portion 7, and the diameter of the inner peripheral edge portion thereof is slightly smaller than the outer diameter of the pin mirror cutter 5. Moreover, along the inner peripheral edge, the pin mirror cutter 5
The teeth 23 meshing with the teeth 19, 21 are arranged at equal intervals in the circumferential direction at the same intervals as the teeth 19, 21. That is, with respect to the teeth 19 and 21 and the teeth 23, by fitting the teeth of the other tooth row to the valley portion between two adjacent teeth of one tooth row,
A large clamping force is obtained, and both form a hearth coupling. Further, in FIGS. 3 and 6, the cutter mounting portion 7 is provided with a locking member 24 which is slidable in the radial direction at a position facing each of the notches 20 in a state where the pin mirror cutter 5 is mounted. Is installed, as shown in FIG.
The locking member 24 has a trapezoidal cross-sectional shape that slidably fits in a guide recess 25 having a trapezoidal cross-section in the cutter mounting portion 7. The tip of the locking member 24 on the tooth 23 side forms an abutment surface 24a that can face the inclined surface 21b of the tooth 21 of the pin mirror cutter 5, and the engaging member 24 projects from the surface in the vicinity of the opposite end. Guide pins 26 are provided. Then, as shown by the alternate long and short dash line in FIG. 6, the locking member 24 has its contact surface 24 a riding on the inclined surface 21 b of the tooth 21 at the advanced position moved toward the (radial direction) center position direction of the cutter mounting portion 7. Press the teeth 21 against the teeth 23 of the cutter mounting portion 7,
Both teeth 21, 23 are fixed in a state in which they are fitted alternately. Further, as shown by the solid line in the figure, the locking member 24 is separated from the region of the notch 20 of the pin mirror cutter 5 in the mounted state at the retracted position retracted in the direction away from the center position of the pin mirror cutter 5, It does not interfere with the work of attaching and detaching the pin mirror cutter 5.

The outer peripheral side surface 27 of the cutter mounting portion 7 (see FIG. 5)
(See reference) to the upper portion of the guide pin 26 of the locking member 24 on the surface, an annular fixing member 28 having a substantially L-shaped cross section for moving the locking member 24 forward and backward is arranged. Fixed member 2
A groove 30 is formed on the outer peripheral side surface 27 of the cutter mounting portion 7 so as to be slidably fitted in a guide projection piece 29 provided in the circumferential direction. Further, as shown in FIGS. 3 and 5, the fixing member 28 is formed with a guide groove 31 into which each guide pin 26 is slidably fitted, and each guide groove 31 is adjacent to a locking member. Between 24, from one end 31a to the other end 31b, it is formed in a curved shape so that the distance from the center of the cutter attachment portion 7 gradually decreases (or increases). Therefore, when the guide pin 26 is located at the one end 31a where the distance from the center of the cutter mounting portion 7 of the guide groove 31 is the largest, the locking member 24 is in the retracted position, and the guide pin 26 is in the guide groove 31. When the distance from the center of the cutter attachment portion 7 of the above is located at the other end 31b which is the minimum, the forward and backward movement of the locking member 24 can be adjusted by rotating the fixing member 28 so that the locking member 24 is in the advanced position. (See FIG. 6).

Since this embodiment is constructed as described above, when the pin mirror cutter 5 is mounted on the cutter mounting portion 7 of the processing machine 6, the fixing member 28 is rotated to guide the guide pin 26 into the guide groove 31. So that it is located at one end 31a of the. In this state, the locking member 24 is in the retracted position. Then, the pin mirror cutter 5 is mounted so that its teeth 19 and 21 are alternately fitted with the teeth 23 of the cutter mounting portion 7, and the notches 20 are positioned so as to face the locking members 24, respectively. In this state, when the fixing member 28 is rotated by a required angle, the guide pins 26 of the respective locking members 24 are inserted into the guide grooves 31 of the fixing member 28 at the other end 31.
By being guided to b and moved to the center side in the radial direction, they are simultaneously slid and simultaneously reach the advanced position. At this time, the abutment surface 24a located at the tip end in the center direction of each locking member 24 rides on the inclined surface 21b of the tooth 21 of the pin mirror cutter 5, and the tooth 21 is placed between the adjacent teeth 23 of the cutter attachment portion 7. The pin mirror cutter 5 is firmly fixed and held by the cutter mounting portion 7 by pressing it against the valley portion of the. Moreover, in this case, each locking member 24 simultaneously moves in the central direction from each position in the circumferential direction of the cutter mounting portion 7 and simultaneously pushes the teeth 21 of the pin mirror cutter 5 in the central direction while riding on the inclined surface 21b. The teeth 19 of the pin mirror cutter 5,
21 is engaged with and fixed to the teeth 23 of the cutter mounting portion 7. Therefore, the pin mirror cutter 5 is automatically aligned with the axis of the cutter attachment portion 7. That is, when the pin mirror cutter 5 is mounted, when the teeth 19 and 21 of the two are engaged with each other, the (radial direction) center position of the cutter mounting portion 7 and the (radial direction) center position of the pin mirror cutter 5 are When the fixed member 28 is rotated, the biased teeth 21 are first pushed by the inclined surface 24a of the locking member 24 and the pin mirror cutter 5
The position can be adjusted finely so that it can be automatically aligned.

The pin mirror cutter 5 is attached to the cutter mounting portion 7
When the fixing member 28 is rotated in the opposite direction when detached from, the guide pin 26 is guided by the guide groove 31 so that the locking member 24 retracts to the retracted position, and the contact surface 24 at the tip end.
Since a is disengaged from the notch 20 of the pin mirror cutter 5, the pin mirror cutter 5 can be easily dismounted from the cutter mounting portion 7 by a gripping claw of a handling robot (not shown) or the like.

As described above, in this embodiment, the teeth 23 of the cutter mounting portion 7 are different from the teeth 19 and 2 of the pin mirror cutter 5.
The pin mirror cutter 5 can be attached to and detached from the cutter attachment portion 7 of the processing machine 6 simply by engaging 1 at a predetermined position and rotating the fixing member 28 by a predetermined angle. It can be easily and quickly attached and detached. In particular, the pin mirror cutter 5 can be fastened and fixed to the cutter mounting portion 7 at the same time by the fixing member 28 and the plurality of locking members 24, and its alignment can be automatically performed. Therefore, automation of attachment / detachment operation of the pin mirror cutter 5 can be easily realized. Further, when the pin mirror cutter 5 is driven for cutting, the driving force of the processing machine 6 is such that each tooth 23 of the cutter mounting portion 7
Since the teeth 19 and 21 of the pin mirror cutter 5 are evenly transmitted over the entire circumference, the driving force is transmitted via several key members 13 as in the conventional mechanism. In comparison, the life of the connecting parts can be significantly extended.

It should be noted that the notch 20 does not necessarily have to be formed in the connecting portion of the pin mirror cutter 5 which can face the locking member 24, and the contact surface 24a of the locking member 24 directly contacts the pin mirror cutter 5. The inclined surface 21b of the tooth 21 (tooth 19) may be pressed. Also, the step 2 is formed on the bottom side of the tooth 21.
The outer peripheral edge portion of the pin mirror cutter 5 may be directly pressed by the contact surface 24a without forming 1a. Further, the teeth 19 and 21 of the pin mirror cutter 5 form first teeth, and the teeth 23 of the cutter mounting portion 7 form second teeth.

[0016]

As described above, the mounting mechanism of the pin mirror cutter according to the present invention has the first tooth and the second tooth which are fitted to each other on the outer peripheral portion of the pin mirror cutter and the inner peripheral portion of the cutter mounting portion, respectively. Since it is provided, the pin mirror cutter can be attached and detached quickly and easily as compared with the conventional fastening structure using a cross key or a bolt. Moreover, since the pin mirror cutter can be automatically aligned at the time of mounting, it is not necessary to perform strict position adjustment at the time of mounting. Therefore, the attachment / detachment of the pin mirror cutter can be easily realized. or,
Since the driving force at the cutter mounting portion side during cutting driving can be evenly distributed to the first teeth via the second teeth on the entire circumference, the life of each member can be extended as compared with the conventional mechanism.

[Brief description of drawings]

FIG. 1 is a plan view of a pin mirror cutter according to this embodiment.

FIG. 2 is a central sectional view of the pin mirror cutter in FIG.

FIG. 3 is a rear view of the essential parts of the state where the pin mirror cutter is attached to the cutter attachment portion of the processing machine.

4 is a cross-sectional view taken along the line AA of FIG.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is an enlarged view showing the forward / backward position of the locking member of FIG.

7 is a cross-sectional view taken along the line CC of FIG.

FIG. 8 is a plan view of a main part of a conventional mounting mechanism in which a pin mirror cutter is mounted on a cutter mounting portion of a processing machine.

9 is a sectional view taken along line DD of FIG.

FIG. 10 is a schematic configuration diagram of a processing machine to which a pin mirror cutter is attached.

[Explanation of symbols]

 5 pin mirror cutter 6 processing machine 7 cutter mounting portion 19, 21, 23 teeth 21b inclined surface 24 locking member 24a contact surface 26 guide pin 28 fixing member 31 guide groove

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tahiro Takasaki 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Corporation (72) Inventor Hirohito Yoshimura 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Masahiro Ishikawa 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd.

Claims (4)

[Claims] 1. A pin mirror cutter mounting mechanism for detachably mounting a pin mirror cutter, which has an annular shape and has cutting blades arranged on an inner peripheral portion thereof, to a cutter mounting portion of a processing machine.
First teeth arranged at equal intervals in the circumferential direction on the outer peripheral portion of the pin mirror cutter, and first teeth arranged at equal intervals in the circumferential direction on the inner peripheral portion of the cutter mounting portion can mesh with the first teeth. A second tooth, a locking member which is mounted on the cutter mounting portion so as to be able to advance and retreat in the radial direction, and which locks both teeth at the advanced position when the first tooth and the second tooth are in mesh, and the locking member And a fixing member for controlling forward and backward movement of the pin mirror cutter. 2. The pin mirror cutter attachment mechanism according to claim 1, wherein the first tooth and the second tooth constitute a hearth coupling. 3. A guide pin provided on the locking member,
The guide member is slidably fitted in a guide groove formed in the fixing member that is rotatable along the outer periphery of the cutter mounting portion, and the locking member moves forward and backward in conjunction with the rotation of the fixing member. The mounting mechanism for the pin mirror cutter according to claim 1 or 2, characterized in that. 4. The pin mirror cutter attachment mechanism according to claim 1, wherein a plurality of the locking members are arranged at equal intervals.