JPH1177469A - Phase positioning device for cam shaft finishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a phase positioning device for a cam shaft finishing machine, whereby a plurality of kinds of workpieces can be worked without performing rearrangement of an initial setup by making a phase positioning pin adjustable in a radial direction. SOLUTION: In this cam shaft finishing machine, in a condition clamping both ends of a workpiece 2 by a right/left chuck 1, the workpiece 2 is worked while rotating the workpiece 2 by the chuck 1. Here, in one end face of the workpiece 2 which must be worked, a pin hole 2b making a position different in a radial direction in accordance with a kind of the workpiece 2 is formed, in at least one of the chuck 1, a phase positioning pin 7 is provided, which performs phase positioning of the workpiece 2 by fitting into the pin hole 2b of the workpiece 2, and the phase positioning pin 7 is made movement adjustable in a radial direction of the chuck 1 by an adjusting means 8. At each changing a kind of the workpiece 2, by only adjusting a position of the phase positioning pin 7 by the adjusting means 8, the workpiece can correspond, so as to dispense with a time required for rearrangement of an initial setup, and in this way, improvement of productivity can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phase positioning device for a camshaft processing machine for processing a camshaft.

[0002]

2. Description of the Related Art Conventionally, in a camshaft processing machine for processing a camshaft such as an engine, when a work to be processed is carried in between left and right chucks, the work is first positioned and then both ends of the work are positioned. In general, a method of processing a work while clamping the work with each chuck while rotating the work by the chuck is employed.

As a phase positioning apparatus for performing phase positioning of a work carried between left and right chucks, for example, Japanese Unexamined Utility Model Publication No. 4-70409 and Japanese Unexamined Utility Model Publication No.
No. 17 is known.

The phase positioning apparatus disclosed in the former publication restricts the rotation of the work by a work braking means in a state where both ends of the work carried into the camshaft processing machine are supported by a center provided on a chuck body, and then the left and right are stopped. After synchronously rotating the chuck body and inserting the positioning pins provided on the chuck into the knock holes of the work, the phase of the work is positioned, and then both ends of the work are clamped by the chuck body. is there.

In the phase positioning device disclosed in the latter publication, the phase positioning pin provided on the chuck can be freely moved in the radial direction of the chuck so that the position of the phase positioning pin and the position of the pin hole provided on the work may vary. The phase positioning pin can be reliably inserted into the pin hole.

[0006]

However, in any of the phase positioning devices disclosed in the above publications, one type of phase positioning pin provided in one chuck and having a radial reference position is inserted into a pin hole formed in a work. Then, when the type of work to be processed is changed and the radial position of the pin hole of the work changes due to the configuration that performs the phase positioning of the work, the phase positioning is performed at the position corresponding to the pin hole of the work. It is necessary to process the work with another machine equipped with pins or change the setup such as changing the position of the phase positioning pin in the radial direction.When processing with another machine, multiple camshaft machines are required There are problems such as increased equipment costs.

[0007] Further, when performing a setup change such as changing the position of the phase positioning pin in the radial direction, a large amount of time is required for the setup change, resulting in a problem such as a decrease in productivity. SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and a camshaft capable of processing a plurality of types of workpieces without changing setups by making a phase positioning pin freely adjustable in a radial direction. It is an object of the present invention to provide a phase positioning device for a processing machine.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a workpiece is machined while the workpiece is rotated by the chuck while both ends of the workpiece are clamped by the left and right chucks. In a camshaft processing machine, one end face of the workpiece to be processed is
A phase positioning pin for positioning the phase of the work is formed by forming a pin hole at a position different in the radial direction according to the type of the work, and at least one of the chucks is fitted into the pin hole of the work. In addition to the above, the phase positioning pin can be moved and adjusted in the radial direction of the chuck by adjusting means.

With the above structure, even if the type of the work to be processed is changed, the position of the phase positioning pin can be adjusted by adjusting the position of the phase positioning pin according to the type of the work. There is no need to change setups. This eliminates the time and labor required for setup change, thereby improving productivity and saving labor.In addition, there is no need to prepare phase positioning pins that differ in position in the radial direction in advance for each type of work. Management of spare parts is also facilitated.

In order to achieve the above object, a second aspect of the present invention provides an adjusting member which is connected to the phase positioning pin in a non-rotatable manner and is movable in the radial direction of the chuck.
It comprises an adjusting screw screwed to the adjusting member and rotatable from the outer peripheral side of the chuck, and a spacer for positioning the adjusting member at a plurality of positions.

With the above structure, the movement of the phase positioning pin can be adjusted only by rotating the adjusting screw, and the movement position of the adjusting member is defined by the spacer, so that the phase positioning pin is moved to a position corresponding to the pin hole of the work. Since it can be stopped accurately, the phase positioning pin can be securely fitted into the pin hole of the work when the work is positioned in phase.

In order to achieve the above object, according to the third aspect of the present invention, the phase positioning pin and the adjusting member are loosely connected so that the phase positioning pin can float in the radial direction of the chuck.

According to the above configuration, when the phase of the work is positioned, even if the center of the pin hole of the work and the center of the phase positioning pin are slightly shifted due to a variation in the processing position in the radial direction or the like.
Since the phase positioning pin can be easily inserted into the pin hole, the phase positioning time can be reduced, and the operation rate can be improved because the machine does not stop due to the incorrect insertion of the pin.

In order to achieve the above object, the invention according to claim 4 is provided with a work discriminating pin for discriminating the type of the work from the moving amount of the adjusting member.

According to the above configuration, it is possible to easily determine whether the position of the phase positioning pin corresponds to the type of the work only by visually checking the work determination pin. In addition, it is possible to prevent a trouble such as a machine breakdown.

[0016]

Embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 denotes a pair of chucks (only one is shown in FIG. 1) provided in a camshaft processing machine for milling a camshaft, and the opposing surfaces of a main spindle head (not shown) movable in the contact and separation directions. It is rotatably mounted on.

A work 2 is provided at the center of each of the chucks 1.
Centers 3 that are fitted into center holes 2a formed in advance on both end surfaces of the workpiece 2 and support both ends of the work 2
The center 3 is provided movably in the axial direction, and a center moving means (not shown) is provided behind each of the centers 3 to move the centers 3 in the direction of contact and separation.

A plurality of chucks 1 are provided in the radial direction.
For example, three concave grooves 1a are formed, and these concave grooves 1a are formed.
A claw body 4 for clamping an end portion of the work 2 is accommodated in the movable member a. Each of the claws 4 is engaged with one end of the operating rod 5 via a wedge-shaped inclined surface 5a.

The operating rods 5 are accommodated in the chuck 1 so as to be parallel to the axis, and the other end of each operating rod 5 is connected to a not-shown clap cylinder. By moving back and forth,
Each claw body 4 is moved in the radial direction of the chuck 1 so that the end of the work 2 can be clamped or unclamped.

On the other hand, by contacting the end surface of the work 2 with the periphery of the center 3 provided at the center of the chuck 1, a longitudinal reference surface 6 for positioning the work 2 in the longitudinal direction, and a work 2 Pin hole 2b pre-drilled in the end face of
Is provided with a phase positioning pin 7 for performing phase positioning of the work 2 by fitting to the phase adjusting pin.

The phase positioning pin 7 can be moved and adjusted in the radial direction of the chuck 1 by adjusting means 8 so that the phase of the work 2 can be positioned even if the type of the work 2 changes. The phase positioning pin 7 protrudes from the front surface on the inner diameter end side of a block 7 a housed in the groove 1 c of the chuck 1 so as to be movable in the radial direction, and the tip end is easily fitted into the pin hole 2 b of the work 2. Is formed in a hemispherical shape.

A locking pin 7b is implanted on the outer peripheral end of the block 7a.
Hole 8 opened at one end of adjustment member 8a
b. The adjusting member 8a is accommodated in a guide hole 1b formed in the chuck 1 so as to be movable in the radial direction, and a flange 8c formed at the other end is provided with a gap between a pair of spacers 8d and 8e. 8f.

The flange 8c and one spacer 8
A non-rotating pin 8g implanted on the chuck 1 side is engaged with d so that the adjusting member 8a and the spacer 8d do not rotate, and are formed on the flange portion 8c side of the adjusting member 8a. One end of the adjusting screw 8i is screwed into the screw hole 8h. The adjusting screw 8i has a large-diameter portion 8j formed at an intermediate portion, and the large-diameter portion 8j is fixed to the chuck 1 by a fixing tool 9 to form a concave portion 8m of a holding plate 8k.
The other end of the adjusting screw 8i penetrates through the holding plate 8k, protrudes from the outer peripheral surface of the chuck 1, and is provided at the tip thereof with a tool (not shown) such as a spanner. A polygon part 8n for rotating the adjusting screw 8i and a lock nut 8p for fixing the adjusting screw 8i at the adjusting position are provided.

In the figure, reference numeral 10 denotes a work discriminating pin provided at one end thereof in contact with the flange portion 8c of the adjusting member 8a by a spring 11 and provided at the other end so as to be able to protrude and retract from the holding plate 8k. According to the amount, it can be visually determined which work 2 the position of the phase positioning pin 7 corresponds to.

Reference numeral 12 in the figure denotes a rubber sheet for preventing chips and the like from entering and hindering the movement of the phase positioning pin 7, and covers the outer peripheral end opening of the groove 1c in which the block 7a is accommodated. So that it is interposed.

Next, the operation will be described. In the work 2 to be processed by the camshaft processing machine, pin holes 2b whose positions are varied in the radial direction in accordance with the type of the work 2 are previously formed on one end face. Therefore, first, the position of the phase positioning pin 7 is adjusted according to the type of the work 2 to be processed. In the adjustment, the lock nut 8p that fixes the adjustment screw 8i is loosened, a tool is applied to the polygonal portion 8n, and the adjustment screw 8i is rotated by the tool. Since 8a is moved in the radial direction of the chuck 1, the adjusting screw 8i is rotated until the flange portion 8c of the adjusting member 8a contacts the spacer 8d or 8e.

With this, the position of the phase positioning pin 7 can be adjusted in two stages, so that it can correspond to two types of workpieces 2 and the positioning is performed by pressing the flange 8c against the spacer 8d or 8e. The accuracy is very good, and the adjustment position can be easily reproduced. Further, with the movement of the adjusting member 8a, the tip of the work discriminating pin 10 protrudes and retracts from the holding plate 8k, so that it is possible to easily visually determine which work 2 the position of the phase positioning pin 7 corresponds to.

When the position adjustment of the phase positioning pin 7 is completed, the lock nut 8p is tightened to adjust the adjustment screw 8i.
Is fixed, and in this state, the work 2 is carried between the chucks 1 by a transfer means such as a loader, and the phase of the work 2 is positioned as follows. In other words, both ends of the work 2 carried between the chucks 1 are supported by the centers 3 provided in the chucks 1 by moving forward.

Next, when the rotation of the work 2 is stopped by a braking means (not shown) in this state, the chuck 1 is rotated, and the phase positioning pin 7 provided on one of the chucks 1 is rotated.
Is inserted into the pin hole 2b of the work 2, and the phase of the work 2 is positioned.
a is loosely fitted in the adjustment member 8a pin hole 8b, the phase positioning pin 7 is in a floating state in the radial direction of the chuck 1, and thereby the pin hole 2b of the work 2 Even if the center of the phase positioning pin 7 is slightly shifted, the phase positioning pin 7 can be easily fitted into the pin hole 2b.

When the phase positioning of the work 2 is completed as described above, the work 2 is rotated by each chuck 1 after being clamped by the claw body 4 and the processing of the work 2 is started by a cutter (not shown). When the type of the workpiece 2 to be processed next changes after the processing of the workpiece 2 is completed, the work of adjusting the phase positioning pin 7 may be performed again.

In the above-described embodiment, the phase positioning pin 7 is adjusted in two steps in the radial direction so that the two types of work 2
However, since the position of the phase positioning pin 7 can be adjusted steplessly by the adjusting screw 8i, by controlling the distance from the center of the work 2 to the center of the phase positioning pin 7, It is also possible to correspond to two or more types of works 2.

In the above embodiment, the phase positioning pins 7 are provided on one of the chucks 1.
May be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a phase positioning device of a camshaft processing machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged view in a B circle of FIG. 1;

FIG. 4 is a view as seen from a direction C in FIG. 1;

FIG. 5 is a view as seen from a direction D in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chuck 2 ... Work 2b ... Pin hole 7 ... Phase positioning pin 8 ... Adjusting means 8a ... Adjusting member 8d, 8e ... Spacer 8i ... Adjusting screw 10 ... Work determination pin

Claims (4)

[Claims] 1. A camshaft processing machine for processing a work 2 while rotating the work 2 with the chuck 1 in a state in which both ends of the work 2 are clamped by left and right chucks 1, and having one end face of the work 2 to be processed. , Work 2
Hole 2b whose position is varied in the radial direction according to the type of
And at least one of the chucks 1 has
A phase positioning pin 7 for positioning the phase of the work 2 is provided by being fitted into the pin hole 2b of the work 2, and the phase positioning pin 7 can be freely moved and adjusted in the radial direction of the chuck 1 by adjusting means 8. A phase positioning device for a camshaft processing machine. 2. An adjusting member 8a non-rotatably connected to the phase positioning pin 7 and movable in the radial direction of the chuck 1, an adjusting member 8a screwed to the adjusting member 8a, and an outer periphery of the chuck 1. An adjustment screw 8i that is rotatable from the side,
Spacer 8 for positioning adjustment member 8a at a plurality of positions
2. A phase positioning device for a camshaft processing machine according to claim 1, wherein said phase positioning device comprises d and 8e. 3. The phase positioning device for a camshaft processing machine according to claim 1, wherein the phase positioning pin 7 and the adjusting member 8a are loosely connected so that the phase positioning pin 7 can float in the radial direction of the chuck 1. 4. The phase positioning device for a camshaft processing machine according to claim 1, further comprising a work discriminating pin 10 for discriminating the type of the work 2 from the amount of movement of the adjusting member 8a.