JPH1071519A - Phase positioning method in crank shaft miller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a workpiece phase by a phasing pin in a crank shaft miller with which a workpiece is machined after fixed. SOLUTION: In a crank shaft miller wherein both ends of a workpiece 2 to be machined are fixed by a chuck 3 and a tail stock 30, and the pins 2a of the workpiece 2 are machined by a rotary cutter, after carrying the workpiece 2 between the chuck 3 and the tail stock 30, both ends of the workpiece 2 are supported by the centers 3a and 30a provided in the chuck 3 and the tail stock 30 respectively, and then the counter weight 2c of the workpiece 2 is temporarily clamped by the phasing claws provided in the chuck 3 and the unclamped, and the phase of the workpiece 2 is roughly positioned. Then, a phasing pin 4, which is provided in the tail stock 30 is fitted in the pin hole 2e of the workpiece 2 to position the phase of the workpiece 2. Since the workpiece 2 is fixed in the crank shaft miller, the phase of the workpiece 2 can be positioned using the phasing pin 4 by means of the crankshaft miller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phase positioning method for a crankshaft mirror for performing phase positioning of a crankshaft (work) to be machined by a crankshaft mirror.

[0002]

2. Description of the Related Art Conventionally, a crankshaft used for an engine or the like processes a pin or a journal using a crankshaft mirror, but the pin is eccentric in a phase (rotation) direction with respect to the journal. Conventionally, it is necessary to perform positioning in the phase direction. Conventionally, a reference seat for phase positioning is formed in advance on a counterweight of a work, and the reference seat is brought into contact with a phase claw provided on a chuck, so that the phase of the work is adjusted. Positioning is being performed.

Also, when machining a camshaft used for an engine or the like, phase positioning is required.
No.-88820 and Japanese Utility Model Laid-Open No. 5-12024,
It has been proposed in Japanese Patent Application Laid-Open No. 6-155125.

[0004] Of these publications, Japanese Unexamined Utility Model Publication No. 5-88820 and Japanese Unexamined Utility Model Publication No. 5-12024 disclose a process (cam shaft) in which a pin hole for phase positioning is formed in advance, and a phase pin is formed on the chuck side. The work is phase-positioned by rotating the chuck while preventing the work from rotating by the brake means provided on the rest side, and inserting the phase pin into the pin hole of the work. .

In Japanese Patent Application Laid-Open No. HEI 6-155125, the cam portion of a work is detected by a phase sensor, and the NC signal for controlling the camshaft processing machine is used to calculate the phase of the work based on the obtained signal to obtain coordinates. By automatic setting, phase positioning can be performed without using a phase positioning device.

[0006]

However, in a machine in which a reference seat is machined in advance on a workpiece and the reference seat is brought into contact with a phase claw to perform phase positioning, another machine is used in advance. It is necessary to process the reference seat with high precision on the work, which requires a lot of man-hours for this processing, resulting in poor productivity, and requires a dedicated machine for processing the reference seat, which increases equipment costs. There is a defect.

On the other hand, in the camshaft phase positioning, the chuck is rotated to perform phase positioning.
When applying to a crankshaft mirror that fixes a work with a chuck and processes the work with a rotating cutter, it is necessary to separately provide a work rotation unit that rotates the work after loading the work and performs phase positioning of the work. There are complicated and expensive defects.

If the work is carried in after the work has been phase-positioned by the work carrying-in / out means for carrying in / out the work in advance, the work carrying-in / out device requires a highly accurate positioning device. There is an expensive defect. SUMMARY OF THE INVENTION The present invention has been made in order to improve the above-described conventional problems, and has as its object to provide a crankshaft mirror phase positioning method capable of accurately performing phase positioning in a crankshaft mirror that processes a workpiece in a fixed state. Things.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, an end of a work to be processed is fixed by a chuck and a tail stock, and the work is rotated by a rotating cutter. In the crankshaft mirror for processing the pin, when the work is carried between the chuck and the tailstock, both ends of the work 2 are supported by the centers provided on the chuck and the tailstock, and then, the phase claw provided on the chuck is used. After temporarily clamping the work counter weight, unclamping it
The phase positioning of the crankshaft mirror is characterized in that the phase positioning of the workpiece is performed by roughly positioning the phase of the work and then inserting the phase pin provided on the tail stock into the pin hole of the workpiece to perform the phase positioning of the workpiece. Things.

[0010] With the above structure, it is not necessary to previously process a reference position for phase positioning in a separate step on the counterweight of the work, so that the number of steps can be reduced and productivity associated therewith can be improved, and the reference position can be processed. Equipment cost can be reduced because a dedicated machine is not required.

Further, since it is not necessary to rotate the work and insert the phase pin into the pin hole of the work, it is not necessary to provide a separate means for rotating the work, thereby simplifying the apparatus.

According to a second aspect of the present invention, there is provided a crankshaft mirror for fixing an end of a work to be machined by a chuck and a tailstock, and for machining a pin of the work 2 with a rotating cutter. ,
When the work is carried in between the chuck and the tail stock, both ends of the work are supported by centers provided on the chucks and the tail stock, and then the work is positioned between a pair of phase claws provided on the chuck. After the rough operation, the phase pin provided on the tail stock is fitted into the pin hole of the work, and the phase of the crankshaft mirror is characterized by performing the phase positioning of the work.

According to the above configuration, even when the phase pin is inserted into the pin hole of the work to perform the phase positioning of the work, it is not necessary to carry in the work in a state where the phase of the work is positioned. It is not necessary to provide the phase positioning means, and the cost of the peripheral device can be reduced.

Further, since it is not necessary to use one of the phase claws provided on the chuck as a movable claw, the structure of the chuck can be simplified.

According to a third aspect of the present invention, the end of a workpiece to be machined is clamped by a chuck and a tail stock to fix the workpiece, and the pin of the workpiece is machined by a rotating cutter. In the crankshaft mirror, when the work is carried between the chuck and the tailstock, the counterweight of the work is temporarily clamped and unclamped by the phase claw provided on the chuck, and the phase of the work is roughly positioned.
A crankshaft characterized in that a phase pin provided on a tail stock is inserted into a pin hole of a work to perform phase positioning of the work, and thereafter, both ends of the work are supported by a center provided on a chuck and a tail stock. This is to perform mirror phase positioning.

According to the above configuration, it is not necessary to previously process a reference position for phase positioning in a separate step on the counterweight of the work, so that the number of steps can be reduced and productivity associated therewith can be improved, and the reference position can be processed. Equipment cost can be reduced because a dedicated machine is not required.

Further, since there is no need to rotate the work and fit the phase pin into the pin hole of the work, there is no need to separately provide a means for rotating the work, thereby simplifying the apparatus.

According to a fourth aspect of the present invention, there is provided a crankshaft mirror for fixing an end of a work to be machined by a chuck and a tail stock and machining a pin of the work with a rotating cutter. After the work is carried in between the chuck and the tail stock, the work is roughly positioned between a pair of fixed phase claws provided on the chuck, and then the phase provided on the other chuck and the tail stock is set. The phase of the crankshaft mirror is characterized in that a pin is inserted into a pin hole of the work to perform phase positioning of the work, and thereafter, both ends of the work are supported by centers provided on a chuck and a tail stock. It was made.

According to the above configuration, even when the phase pin is inserted into the pin hole of the work to perform the phase positioning of the work, it is not necessary to carry in the work in the state where the phase of the work is positioned. There is no need to provide accurate positioning means, which can reduce the cost of peripheral devices.

Since it is not necessary to use one of the phase claws provided on the chuck as a movable claw, the structure of the chuck can be simplified.

[0021]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a chuck portion of a crankshaft mirror for carrying out a phase positioning method for a crankshaft according to the present invention. In this figure, 1 is a pair of work heads provided on a bed (not shown) so as to be movable in the direction of contact and separation. Is shown.

On the opposite surface of the work head 1, a chuck 3 for fixing both ends of the work 2 for processing the pins 2a and a tail stock 30 are provided. In the chuck 3 and the tail stock 30, centers 3a, 3 supporting center holes 2b pre-processed on both end surfaces of the work 2 are provided.
A pair of phase claws 3b and 3c are provided on the chuck 3 for temporarily clamping the counter wit 2c of the work 2 in a direction orthogonal to the longitudinal direction of the work 2 and then unclamping the phase. Three claws 3 for fixing the work 2 by clamping one end of the work 2 from three sides
d is provided.

As shown in FIG. 2, both ends of the phase claws 3b and 3c are located on both sides of the counter wire 2c of the work 2 supported by the centers 3a and 30a, and one is fixed to the chuck 3. The other is movable in the direction of contact and separation by driving means (not shown), and the rear end of the movable-side phase claw 3c does not project outward from the outer periphery of the chuck 3 when the phase is unclamped. I have.

On the tail stock 30 side, a work 2 is provided.
A phase pin 4 fitted into a phase positioning pin hole 2e pre-processed on the end face of the flange portion 2d and a pair of support claws 30b for supporting the flange portion 2d of the workpiece 2 from below are formed around the circumference of the flange portion 2d. They are arranged at equal intervals in the direction.
The phase pin 4 is parallel to and above the center 30a,
In addition, it is provided so as to be able to advance and retreat separately from the center 30a, and a tapered portion 4a is formed at the tip.

In FIG. 1, reference numeral 5 denotes a ring-shaped cutter for cutting the pin 2a of the work 2, and 6 supports a journal 2f adjacent to the processed pin 2a to prevent the work 2 from bending due to a cutting reaction force. Showing the work rest to be performed.

Next, the phase positioning method of the present invention will be described. The work 2 for processing the pin 2a is carried in a substantially horizontal state from above between the chuck 3 and the tail stock 30 by a work carrying-in / out means (loader) (not shown). At this time, the centers 3a and 30a and the phase pins 4 Work 2
Has been retreated to avoid interference. When the loading of the work 2 is completed, the centers 3a, 30a of the chuck 3 and the tail stock 30 are advanced, each center 3a is fitted into the center hole 2b of the work 2, and both ends of the work 2 are connected to the centers 3a.
a, 30a.

Next, in this state, the movable-side phase claw 3c is advanced by driving means (not shown), and the fixed-side phase claw 3b is moved.
By clamping the counter weight 2c of the work 2 between the steps (1) and (2), the phase temporary clamping of the work 2 is performed.
Thereafter, the phase claw 3c on the movable side is retracted a little and the counterweight 2c is unclamped to perform the phase unclamping. Due to this phase unclamping, a slight gap is formed between each phase claw 3b, 3c and the counterweight 2c.

Next, in this state, the phase pin 4 provided on the tail stock 30 is advanced, and the phase pin 4 is fitted into the pin hole 2e formed on the end face of the flange portion 2d, and the phase positioning of the work 2 is performed. Will be At this time, the phase pin 4
Even if the position of the pin hole 2e is slightly shifted
Since there is a slight gap between b and 3c and the counterweight 2c, and the work 2 is not restricted in the rotation direction,
When the phase pin 4 is moved forward with the tapered portion 4a at the tip of the phase pin 4 fitted in the pin hole 2e, the work is rotated by the phase pin 4 and the displacement is corrected. be able to.

When the phase positioning of the work 2 is completed as described above, the claw body 3d of the chuck 3 provided with the phase claws 3b and 3c is driven toward the center, one end of the work 2 is clamped, and the work 2 is clamped. Is fixed. Thereafter, the cutter 5 is moved to the pin 2a to be processed first, and the rest 6 is moved to the journal 2f adjacent to the pin 2a, so that the pin 2a is sequentially processed by the rotating cutter 5.

The above is a method of performing the phase positioning of the work 2 in which the temporary clamp width (two surface widths) has not been pre-processed in advance on the counterweight 2c of the work 2; In this case, the phase positioning can be performed by the following method.

Chuck 3 used in this positioning method
As shown in FIG. 4, when a pair of phase claws 3b and 3c are fixed to the chuck 3 as shown in FIG. 4 and the work 2 is supported by the center 3a, the phase claws 3b and 3c and the counterweight 2c are The interval between the phase claws 3b and 3c is set so that a gap of about 0.5 mm is generated between them.

Next, a method of performing phase positioning using the chuck 3 will be described. When the work 2 is carried in with the centers 3a and 30a of the chuck 3 and the tail stock 30 and the phase pins 4 being retracted, the centers 3a and 30a of the chuck 3 and the tail stock 30 move forward to move the work 2 at both ends. The phase claw 3 provided in the chuck 3 is fitted into the center hole 2b, and both ends of the work 2 are supported.
The phase positioning of the work 2 is roughly performed between b and 3c.

Next, in this state, the phase pin 4 provided on the tail stock 30 is advanced, and the phase pin 4 is fitted into the pin hole 2e formed on the end face of the flange portion 2d, and the phase of the work 2 is positioned. Will be At this time, the phase pin 4
Even if the position of the pin hole 2e is slightly shifted
Since there is a gap of about 0.5 mm between the b and 3c and the counterweight 2c and the work 2 is not restrained in the rotation direction, the tapered portion 4a at the tip of the phase pin 4 is inserted into the pin hole 2a.
When the phase pin 4 is moved forward in a state where the phase pin 4 is inserted into the workpiece e, the work piece 2 is rotated by the phase pin 4 and the displacement is corrected, so that the phase positioning can be performed accurately.

When the phase positioning of the work 2 is completed as described above, the claw body 3d of the chuck 3 provided with the phase claws 3b and 3c is driven toward the center, one end of the work 2 is clamped, and the work 2 is clamped. Is fixed. Thereafter, the cutter 5 is moved to the pin 2a to be processed first, and the rest 6 is moved to the jar 2f adjacent to the pin 2a, so that the pin 2a is sequentially processed by the rotating cutter 5.

In any of the above methods, after the work 2 is carried in, the centers 3a, 30a are advanced to roughly position the phase while the both ends of the work 2 are supported by the centers 3a, 30a. Although the phase positioning is performed by fitting into the 2d pin hole 2e, both ends of the work 2 may be supported by the centers 3a and 30a after the phase positioning.

That is, the chuck 3 and the tail stock 3
When the work 2 is carried in during 0, the counterweight 2c of the work 2 is temporarily clamped and unclamped by the phase claws 3b and 3c provided on the chuck 3, and the phase positioning of the work 2 is roughly performed. The phase pin 4 provided on the stock 30 is inserted into the pin hole 2e of the work 2,
In addition to performing phase positioning of the work 2, centers 3a and 3 provided on the chuck 3 and the tail stock 30 are thereafter provided.
Oa may support both ends of the work 2.

As another method, when the work 2 is carried in between the chuck 3 and the tail stock 30, the work 2 is held between a pair of phase claws 3b and 3c provided on the chuck 3.
After roughly positioning the phase, the tailstock 30
The phase pin 4 provided in the work 2 is inserted into the pin hole 2 e of the work 2 to perform the phase positioning of the work 2, and thereafter, the center 3 provided in the chuck 3 and the tail stock 30.
a, 30a may support both ends of the work.

In each of the above embodiments, the work 2 is loaded and unloaded by using a work loading and unloading device (loader). However, even if the worker manually loads and unloads the work 2. Of course.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view near a chuck of a crankshaft mirror for implementing a phase positioning method according to an embodiment of the present invention.

FIG. 2 is an enlarged view from arrow A in FIG. 1;

FIG. 3 is an enlarged view from arrow B in FIG. 1;

FIG. 4 is a sectional view of a phase claw provided on a chuck of a crankshaft mirror for performing a phase positioning method according to another embodiment of the present invention.

[Explanation of symbols]

 2 Work 2a Pin 2c Counter weight 2e Pin hole 3 Chuck 3a Center 3b, 3c Phase claw 4 Phase pin 5 Cutter 30 Tail stock 30a Center

Claims (4)

[Claims] 1. An end of a work 2 to be machined is attached to a chuck 3
When the work 2 is carried between the chuck 3 and the tail stock 30 in the crankshaft mirror that fixes the pin 2a of the work 2 with the rotating cutter 5 and is fixed by the tail stock 30, the chuck 3 and the tail stock 30 The two ends of the work 2 are supported by centers 3a and 30a provided on the chuck 3, and the counterweights 2c of the work 2 are temporarily clamped by the phase claws 3b and 3c provided on the chuck 3, and then unclamped. A phase positioning method for a crankshaft mirror, wherein the phase positioning of the work 2 is performed by fitting the phase pin 4 provided on the tail stock 30 into the pin hole 2 e of the work 2 after roughly positioning the phase. 2. An end of a workpiece 2 to be processed is chucked by a chuck 3.
When the work 2 is carried between the chuck 3 and the tail stock 30 in the crankshaft mirror that fixes the pin 2a of the work 2 with the rotating cutter 5 and is fixed by the tail stock 30, the chuck 3 and the tail stock Centers 3a, 30a provided in 30
After both ends of the work 2 are supported, the phase of the work 2 is roughly positioned between a pair of phase claws 3b and 3c provided on the chuck 3, and then the phase pins 4 provided on the tail stock 30 are moved. A phase positioning method for a crankshaft mirror, wherein the phase positioning of the work 3 is performed by fitting into the pin hole 2 e of the work 2. 3. An end of a workpiece 2 to be processed is chucked by a chuck 3.
The work 2 is fixed by clamping with the tail stock 30 and the pin 2 of the work 2 is
When the work 2 is carried between the chuck 3 and the tail stock 30 in the crankshaft mirror for processing a, the counterweight 2c of the work 2 is temporarily clamped and unclamped by the phase claws 3b and 3c provided on the chuck 3. After roughly positioning the work, the phase pin 4 provided on the tail stock 30 is fitted into the pin hole 2e of the work 2 to perform the phase positioning of the work 2, and thereafter, the chuck 3 and the tail stock. 3
0. A phase positioning method for a crankshaft mirror, wherein both ends of a work 2 are supported by centers 3a and 30a provided at a center position. 4. An end of a workpiece 2 to be processed is chucked by a chuck 3.
When the work 2 is carried between the chuck 3 and the tail stock 30 in the crankshaft mirror fixed with the tail stock 30 and processing the pins 2a of the work 2 by the rotating cutter 5, the work 2 is provided on the chuck 3. After roughly positioning the phase of the work 2 between the pair of fixed phase claws 3b and 3c, the other chuck 3 and the phase pin 4 provided on the tail stock 30 are fitted into the pin holes 2e of the work 2. A phase position of the work 2, and thereafter, both ends of the work 2 are supported by centers 3 a and 30 a provided on the chuck 3 and the tail stock 30.