JP3079679B2 - Turning broach runout measuring method, runout measuring apparatus and turning broach used in the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the amount of run-out of a plurality of cutting blades provided on a broach body of a turning broach, and a method for executing the method. The present invention relates to a deflection amount measuring device and a turning broach.

[0002]

2. Description of the Related Art In recent years, as a method for cutting a crankshaft of a reciprocating internal combustion engine, for example, as shown in FIGS. 5 and 6, a fan-shaped turning broach 1 is attached to a chuck 2a of a processing machine 2. Journal W of Work W
A plurality of workpieces are mounted on the rotating shaft S of the processing machine 2 so as to face the workpiece W. The workpiece W is rotated around the axis by the chuck 2a at a high speed in a specific direction (the direction of arrow A in the drawing). By rotating the broach 1 at a very low speed in a specific direction (arrow B direction in the figure),
The cutting edge 4, 5 (only the cutting edge 4 is shown in FIG. 6) provided on the outer periphery of the broach body 3 of the turning broach 1 is used to cut the side surface of the counterweight C of the work W,
The method of continuously performing the width cutting of the diameter and the diameter processing of the journal J is being widely adopted.

[0003] Here, the cutting edge includes a cutting edge 4 for cutting a side surface of a counterweight, which is arranged on the front end side in the circumferential direction of the broach body 3, and a cutting edge for journal processing provided behind these cutting edges 4. 5 is provided. Moreover, the cutting blade 5 for journal processing includes a cutting blade for journal width processing that projects a predetermined amount in the width direction of the broach body 3 and a cutting blade for journal diameter processing that projects a predetermined amount in the height direction of the broach body 3. It is generally provided separately.

[0004] Then, the cutting edge 5 for machining these journals.
The amount of protrusion of the broach main body 3 in the width direction and the height direction governs the processing width and the processing diameter of the journal J of the work W. When the cutting blades 5 are mounted on the broaching body 5, the amounts of protrusion of the cutting blades 5 in the width direction and the height direction of the broach main body 3 are precisely adjusted using a reference gauge or the like. Here, the amount of protrusion in the width direction is the distance from the center line in the width direction of the broach body 3 to the end of the cutting blade 5, and the amount of protrusion in the height direction is from the mounting surface 6 to the cutting blade 5. Means the distance of
Hereinafter, the operation of adjusting these protrusion amounts is referred to as a runout adjustment operation, and the amount of change in the protrusion amount of each cutting blade 5 is referred to as a runout amount.

[0005]

By the way, in the above-mentioned conventional turning broach 1, since the run-out adjustment of the cutting blade 5 is performed in a state where the broach main body 3 is detached from the rotation shaft S, the broach is actually cut. In some cases, the position of the cutting blade 5 was shifted due to an error in mounting the main body 3 to the rotation shaft S, and the processing width and the processing diameter of the journal J were deviated.

In such a case, it is necessary to adjust the run-out of the cutting blade 5 again using the amount corresponding to the error in the working width and the working diameter of the journal J as the run-out amount. It is conceivable to install the measuring means in the vicinity of the cutting blade 5 and change the position of the cutting blade 5 while measuring the change in the amount of protrusion of the cutting blade 5. However, in such a method, it is necessary to repeat the setting of the measuring means for each of the cutting blades 5, which is troublesome, and as the number of the cutting blades 5 that need to be adjusted increases, the time required for the run-out adjustment work increases dramatically. To increase.

When the turning broach 1 is mounted on the rotating shaft S of the processing machine 2, the mounting surface 6 to be used as a reference in the height direction of the cutting blade 5 is in close contact with the rotating shaft S and cannot be used. Even if the amount of run-out of each cutting edge 5 can be measured independently, it cannot be measured based on the position where the amounts of run-out of the plurality of cutting edges 5 are unified. That is, when one of the cutting blades 5 is to be moved, for example, by 10 μm, the amount of run-out of the cutting blade 5 may be read while applying a dial gauge to the target cutting blade 5 and performing a run-out adjustment operation. Even when the height of the cutting edge 5 from the mounting surface 6 is made to match, for example, even if an attempt is made to adjust the amount of protrusion relative to the plurality of cutting edges 5, there is no unified standard among them. It cannot be adjusted.

[0008] The above problem is not limited to the so-called spiral type turning broach 1 in which the cutting blades 4, 5 are largely protruded toward the outer periphery toward the rear in the circumferential direction as shown in FIGS. 5 and 6. For example, as shown in FIG. 7, a similar problem occurs in a turning broach 8 of a linear type in which a cutting blade is attached to one side of a broach body 7 of a rectangular flat plate shape. Unlike these turning broaches 1 and 8, the so-called circular type broaching brochure 9 in which the cutting blades 4 and 5 are positioned on the same arc and the broach main body is sent out to the center in the radial direction of the work at the time of machining is the same. It is.

The present invention has been made under such a background, and provides a run-out amount measuring method capable of easily measuring the run-out amount of a cutting blade with a turning broach attached to a processing machine. An object of the present invention is to provide a shake amount measuring device and a turning broach suitable for the method.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a method for measuring the run-out amount of a turning broach according to the present invention comprises a measuring method that extends along a feed direction of the broach main body on a side of the broach main body that faces the width direction. Forming a reference surface, a support member extending in the height direction of the broach main body is disposed on the measurement reference surface so as to be movable along the measurement reference surface,
The measuring means is disposed on the support member to measure the runout of the plurality of cutting blades. Here, the width direction and the height direction of the broach main body include the axial direction and the radial direction of the broach main body curved in a fan shape, respectively.

The shake amount measuring apparatus used in the above shake amount measuring method measures the shake amount of the cutting blade facing a cutting blade disposed on one side in the height direction of the broach body of the turning broach. Measuring means, and a supporting member for supporting the measuring means, the supporting member having one end abutting on a measuring reference surface formed on the broach body and moving on the measuring reference surface. It has a leg that is freely provided and the other end of which protrudes beyond the cutting blade in the height direction of the broach body, and a support table that is provided at the other end of the leg and to which the measuring means is attached. It is characterized by doing.

[0012] Further, in the turning broach used in the above-described measuring method, a side of the broach body facing the width direction is provided with:
Forming at least one flange protruding from the side,
On the side of the flange facing one side in the height direction of the broach main body, a measurement reference plane extending along the feed direction of the broach main body is formed, and the measurement reference plane is the height of the cutting blade.
The first reference plane for measuring the amount of runout
Second measurement standard for measuring the amount of runout in the width direction of the blade
And a surface .

[0013]

According to the swing amount measuring method of the above construction, the measuring means supported via the support member on the measurement reference plane of the broach main body moves along the feed direction, thereby providing the swing amount of the plurality of cutting blades. Can be measured on the same basis. Moreover, it is not necessary to remove the measuring means from the broach main body and replace it each time the cutting blade to be measured is changed.

Further, according to the shake amount measuring apparatus having the above structure, one end of the leg of the support member is brought into contact with the measurement reference surface of the broach body, and the support member is moved along the measurement reference surface. Measuring means mounted on the support,
It can be moved between a plurality of cutting edges without changing the distance to the measurement reference plane.

Further, according to the turning broach having the above configuration, the first measuring reference plane and the second measuring base are provided on the side in the width direction of the broach main body with the broach main body mounted on the processing machine.
Reference planes, these measurement reference planes are integrated.
The amount of runout in the height direction and the width direction of multiple blades as one standard
Can be measured and adjusted individually,
The machining depth (machining diameter) and machining width of the work material may be misaligned.
It can be processed precisely without the need.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 in the order of a turning broach, a shake measuring device, and a shake measuring method.

In FIG. 4, reference numeral 10 denotes a turning broach according to the present embodiment.
Are a plurality of, for example, three segments 12 to 12 attached to a rotating shaft S of a processing machine (not shown) via a liner 11.
One broach main body 15 constituted by 14 is provided.
The liner 11 is an annular member attached to the rotating shaft S with bolts 11a, and its outer peripheral surface is formed in a cylindrical shape coaxial with the outer peripheral surface of the rotating shaft S.

As shown in FIG. 1 to FIG.
The third segment 14, which is located third from the circumferential end of No. 5, is a fan-shaped flat plate-shaped convex wall disposed at the center in the width direction (the direction orthogonal to the paper surface in FIG. 1). 16 and two flanges 17, 17 disposed on the base end side of the convex wall portion 16 and projecting from the side surfaces 14 a, 14 a facing the width direction of the segment 14. A plurality of cutting blade tips 18 and 19 for journaling are mounted in a zigzag manner on the outer peripheral portion of the convex wall portion 16 located on one side in the height direction via run-out adjusting mechanisms 20 and 21.

Of the cutting edges 18 and 19, the two cutting edges 18 arranged on the distal end side of the third segment 14 in the circumferential direction are used for machining the width of the work W (see FIG. 7). In the state where the thickness direction of each segment is substantially coincident with the width direction of the segment 14 and each cutting edge 18a is projected from the outer peripheral surface of the convex wall portion 16, it is attached to the holder 22 of the shake adjusting mechanism 20. I have. The runout adjusting mechanism 20 includes the holder 22 inserted into the concave portion 14b of the segment 14, and the wedge member 23 interposed between the holder 22 and the bottom surface of the concave portion 14b.
Adjustment amount of the segment 14 in the width direction
4, the cutting edge tip 18 is moved in the radial direction of the segment 14.

On the other hand, the other two cutting edge tips 19 arranged on the rear end side in the circumferential direction of the third segment 14 are for the purpose of machining the diameter of the work W on the journal, and the thickness direction of each of them is determined. The cutting edge 19a is attached to the holder 26 of the run-out adjustment mechanism 21 in such a manner that the cutting edge 19a is substantially aligned with the radial direction of the segment 14 and each cutting edge 19a projects from the outer peripheral surface of the convex wall portion 16. The run-out adjusting mechanism 21 is provided with the concave portion 14 of the segment 14.
c, a wedge member 27 having a cross-shaped cross section interposed between the holder 26 and the bottom surface of the recess 14c, and a disc spring 28 for pressing the holder 26 toward the bottom surface of the recess 14c. By moving the wedge member 27 substantially in the circumferential direction of the segment 14 by the adjusting screw 29 attached to the bottom surface side of the concave portion 14c, the cutting edge tip 19 can be forcibly moved in and out of the radial direction of the segment 14. It has a configuration.

The flange 17 is curved in an arcuate shape along the convex wall portion 16, and the lower surface of each of the flanges 17 is the liner 1 described above.
1 (see FIG. 4) is formed into a cylindrical surface curved at the same curvature as the outer peripheral surface, and serves as a mounting surface 30 to the liner 11.
Then, measurement reference surfaces 31 and 32 are formed on the end surfaces of the flanges 17 opposite to the mounting surface 30.

Among these measurement reference surfaces 31 and 32, the first measurement reference surface 31 facing the height direction of the segment 14 is:
Grinding is performed to form a curved surface extending in the circumferential direction of the segment 14 while maintaining an equal interval with the mounting surface 30 of each flange 17, and the distance of each measurement reference surface 31 from the mounting surface 30 is equal on the left and right. On the other hand, as shown in more detail in FIG. 2, the second measurement reference surface 32 facing the width direction of the segment 14 is formed on a flat surface extending in the normal direction of the first measurement reference surface 31. The interval between the reference surfaces 32 is constant from one end to the other end in the circumferential direction of the segment 14. Each flange 17 has a segment 1
A mounting hole 33 having a long hole shape extending in the circumferential direction of No. 4 is formed, and a bolt seat 33a is formed in a part thereof.

Further, a key groove 34 extending in the circumferential direction of the segment 14 and a key groove 35 extending in the width direction are formed on the inner peripheral side of the segment 14. And FIG.
As shown in FIG. 3, the third segment 14 includes a keyway 34,
35 is engaged with a key 36 attached to the outer peripheral portion of the liner 11 (one key is omitted from the figure), and the mounting surface 30 is brought into close contact with the outer peripheral surface of the liner 11 so that its circumferential direction and width direction can be adjusted. The rotating shaft S is aligned with the circumferential direction and the axial direction of the rotating shaft S. In this state, the rotating shaft S is attached to the liner 11 by a mounting bolt 37 inserted into the mounting hole 33 so as to be integrally rotatable with the rotating shaft S.

Note that the above configuration is equivalent to the third segment 14
As shown in FIG. 4, the measurement reference planes 31, 32 are similarly provided on the first and second segments 12, 13, respectively.
(In FIG. 4, the measurement reference plane 32 is omitted.)
In addition, the structure for attaching the first and second segments 12 and 13 to the rotation shaft S is the same. These segments 12 to 14 are attached to the rotating shaft S so that their circumferential directions coincide with each other. Therefore, the circumferential direction, the width direction, and the height direction of the broach body 15 according to the present invention are the same as those of the present embodiment. In this case, it is coincident with the circumferential direction, the width direction, and the height direction of the segments 12 to 14.

On the other hand, in FIGS. 1 and 2, reference numeral 40 denotes a shake amount measuring apparatus according to the present embodiment. The shake amount measuring device 40 includes a dial gauge (measuring means) 41 for measuring the shake amount of the cutting blade tips 18 and 19, and a support member 42 for supporting the dial gauge 41. The dial gauge 41 is provided on the case 43 by enlarging the axial displacement of the tracing stylus 44 that protrudes from one end of the guide cylinder 43 a of the case 43 and comes into contact with the measurement object by an enlargement mechanism (not shown) built in the case 43. It is a well-known one that is displayed on display means (not shown) such as a pointer.

The support member 42 is generally constituted by a pair of legs 45 arranged on the first measurement reference surface 31 of the turning broach 10 and a support base 46 to which the dial gauge 41 is attached. . Each of the legs 45 has two rollers 4 that abut on one end side with the first measurement reference surface 31.
The roller 47 is movable along the first measurement reference plane 31 in the circumferential direction of the broach main body 15. Also, the broach body 1 of the roller 47
5 is formed on a flat surface facing the second measurement reference surface 32 of the turning broach 10 at a small distance, and the leg 45 is connected to the broach main body 1.
5 into either side in the width direction of the roller end face 4
By bringing the 7a into contact with the second measurement reference plane 32, the position of the leg 45 in the width direction can be kept constant.

The other end of the leg 45 protrudes beyond the cutting blades 18a and 19a in the height direction of the broach body 15, and is connected to the support base 46. Then, the support table 46
A through-hole 47 extending in the height direction of the broach main body 15 is formed in the dial gauge 41. The dial cylinder 41a of the dial gauge 41 fitted in the through-hole 47 is pressed radially by a set screw 48 to thereby obtain a dial gauge. 43 is supported.

Next, the method for measuring the amount of shake of the present embodiment will be described together with the operation of the above-described shake amount measuring device 40 and the turning broach 10.

First, in order to individually measure the runout of the cutting blades 18a and 19a of the turning broach 10 attached to the processing machine by the runout measuring device 40 of the present embodiment, the runout of each leg 45 of the support member 42 is measured. Roller 47 to broach body 1
5 while supporting the support member 42 by contacting the first measurement reference surface 31, and attaching the dial gauge 41 to the support base 46 so that the tip of the tracing stylus 44 comes into contact with the cutting blades 18 a and 19 a. In this state, the run-out adjustment operation of the cutting blades 18a and 19a may be performed, and the run-out amount may be read by the dial gauge 41. In this case, it is necessary to attach and detach the dial gauge 41 to and from the broach body 15 by measuring the runout amount of each of the cutting blades 18a and 19a while moving the support member 42 along the first measurement reference plane 31. Since it is no longer necessary, the time required for the shake adjustment work can be greatly reduced by eliminating the work required for the adjustment work.

For example, when it is desired to make the heights of the cutting blades 19a coincide with each other, the measuring element 44 of the dial gauge 41 is brought into contact with one of the cutting blades 19a, and
Is read, and then the support member 42 is moved to bring the tracing stylus 44 of the dial gauge 41 into contact with the other cutting edge 19a to read the measured value. In this case, the difference in the measured value of the dial gauge 41 with respect to each cutting edge 19a is the diameter of each cutting edge 19a because the first measurement reference surface 31 extends at an equal interval with the mounting surface 30 of the broach body 15. It is nothing but a difference in the amount of protrusion in the direction. Therefore, one of the cutting blades 1 previously measured
The measured value of the dial gauge 41 of 9a and the other cutting edge 19
By adjusting the run-out of the other cutting edge 19a until the measured value of the dial gauge 41 of FIG.
The radial height of the broach main body 15 of FIG. Thus, in this embodiment, the first measurement reference plane 3
Since the runout amount of the two or more cutting blades 19a can be measured based on 1, the relative runout between the cutting blades can be adjusted on the processing machine.

In the above description, the cutting blades 18a, 19a
The case where the height of the cutting blade 18 is adjusted has been described. However, in the turning broach 10 of the present embodiment, since the second measurement reference surface 32 is provided on the broach body 15, the amount of runout of the cutting blade 18a in the width direction is measured. You can also. That is, as described above, the width direction position of the support member 42 is kept constant by bringing the roller end surface 47a of the leg 45 into contact with the second measurement reference surface 32. Is inverted by 90 ° so that the tracing stylus 44 can be freely moved in the width direction of the broach body 15, so that the amount of deflection in the width direction of the plurality of cutting blades can be quickly measured on the same basis.

[0032]

Further, in this embodiment, a spiral type turning broach has been particularly described as an example. However, the present invention is not limited to this, and may be a linear type shown in FIG. 7 or a circular type shown in FIG. Is of course also applicable.

[0034]

As described above, according to the runout measuring method of the present invention, the runout of the plurality of cutting blades can be reduced by moving the support member in the feed direction of the broach body along the measurement reference plane. Since the measurement can be performed quickly, the time required for the run-out adjustment work on the processing machine can be omitted, and the time required for the run-out adjustment work can be greatly reduced. In addition, since the runout amount can be measured relatively between the plurality of cutting blades, there is an effect that the relative runout adjustment operation can be easily performed.

Further, according to the shake amount measuring apparatus having the above structure, by moving the support member along the measurement reference plane of the broach main body, the distance of the measurement means mounted on the support base to the measurement reference plane is changed. Since the cutting edge can be moved between the plurality of cutting blades without causing the above-described movement, the above-described method for measuring the run-out amount can be easily realized.

Further, according to the turning broach having the above structure, the first and second measurement reference surfaces extending along the feed direction of the broach main body are provided on the width direction side portions of the broach main body.
The measurement reference plane is
The cutting edge can be used for each unified reference surface
Measurement of the runout in the height direction and the runout in the width direction.
And can be precisely adjusted.
Precise processing can be performed without causing any deviation in the working width.

[Brief description of the drawings]

FIG. 1 is a side view of a broach body and shake amount measuring device according to an embodiment of the present invention.

FIG. 2 is a view as seen from an arrow II in FIG. 1;

FIG. 3 is a view as seen from the direction of arrow III in FIG. 1;

FIG. 4 is a side view showing an entire configuration of a turning broach according to an embodiment of the present invention.

FIG. 5 is a perspective view for explaining a general crankshaft cutting method using a turning broach.

FIG. 6 is a view for explaining a cutting method using a spiral type turning broach.

FIG. 7 is a diagram for explaining a cutting method using a linear type turning broach.

FIG. 8 is a view for explaining a cutting method using a circular type turning broach.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Turning broach 15 Broach main body 17 Flange 18, 19 Cutting edge chip 18a, 19a for journal processing Cutting edge 31, 32 Measurement reference surface 40 Runout amount measuring device 41 Dial gauge (measuring means) 42 Support member 45 Leg 46 Support

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23D 43/06 B23D 39/00 B23Q 17/22

Claims (3)

(57) [Claims] 1. The swing amount of a plurality of cutting blades arranged at one side in the height direction of a broach body of a turning broach at intervals in the feed direction of the broach body is arranged to face these cutting blades. A method for measuring the amount of runout of a turning broach measured by a measuring means, comprising: forming a measurement reference surface extending along a feed direction of the broach body on a side of the broach body facing a width direction; A support member extending in the height direction of the broach body on the surface is disposed movably along the measurement reference surface,
A method for measuring a runout amount of a turning broach, wherein the runout amount of the plurality of cutting blades is measured by disposing the measuring means on the support member. 2. A measuring means for measuring a run-out amount of a cutting blade which is opposed to a cutting blade arranged on one side in a height direction of a broach body of a turning broach, and a support member for supporting the measuring means. The support member is provided at one end so as to be movable on the measurement reference surface by abutting on a measurement reference surface formed on a side portion of the broach body in the width direction, and the other end is provided with the broach. A turning broach comprising: a leg protruding beyond the cutting blade in the height direction of the main body; and a support provided at the other end of the leg and to which the measuring means is attached. Runout measuring device. 3. A turning broach in which a plurality of cutting blades are arranged on one side in the height direction of the broach main body at intervals in a feed direction of the broach main body, wherein a side surface facing the width direction of the broach main body. Forming at least one flange protruding from the side surface, and forming a measurement reference surface extending along a feed direction of the broach body on a side of the flange facing one side in the height direction of the broach body.
And the measurement reference plane has a deflection in the height direction of the cutting blade.
A first measurement reference plane for measuring the amount and the width of the cutting edge
A second measurement reference plane for measuring the amount of directional shake
Turning brooch characterized by having .