JPH0310767A - Fillet roll resting device - Google Patents

Abstract

PURPOSE:To sufficiently counter with a roll resting reaction force and to prevent escape and swing of an arm by a method wherein a force is exerted on a swing arm energizing means to normally point to a neutral position at the same time when the swing arm has the degree of freedom of rotation. CONSTITUTION:Since, in a state that arms 4 and 5 are spaced away from each other, a stopper block 11 is brought into contact with a stopper plate 12 to regulate the opening positions of the arms 4 and 5, a friction force between the stopper block 11 and the stopper plate 12 produces resistance when a pressurizing cylinder 7 is expanded, and the one arm 4 is first moved. The other arm 5 is not moved before the one arm 4 is brought into contact with journal parts J1..., and the journal parts J1... are nipped by means of the two arms 4 and 5. A swing arm 3 supporting the arms 4 and 5 has the degree of freedom of rotation around a shaft 14 but the swing arm 3 is energized to a neutral position by means of a pair of spring plungers 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fillet rolling device for rolling a fillet portion of a journal portion of a crankshaft for an internal combustion engine.

2. Description of the Related Art A fillet rolling device of this type is disclosed, for example, in Japanese Patent Application Laid-open No. 19561/1983. As shown in FIGS. 7 and 8, this device includes a pair of arms 51, 52, 53.
54 is supported by a swinging arm 55 so as to be openable and closable, and the swinging arm 55 is supported swingably relative to a support plate 56 via a shaft 57. Then, when the pressurizing cylinder 58 is extended and the pair of arms 51, 52 and 53.54 sandwich the journal parts Jl and J2, and the crankshaft Cs is rotated, the arms 51, 52 are rotated as shown in FIG. The fillet rollers 59 and 62 at the tips of 53 and 54 are transferred to roll the fillet portions F of the journal portions Jl and J2. Note that the crank pin P is also rolled at the same time by another arm 60, 61.

Further, when the arms 51.52 and 53.54 are opened, each arm 51.52 and 53.54 is moved to the journal portion Jl by the operation of the cylinder 63.

The opening position is regulated to be the same amount with J2 as the center.

Problems to be Solved by the Invention In the above structure, since the swing arm 55 has a degree of freedom around the shaft 57, the journal portion Jl
, J2 has the advantage of being able to absorb machining errors, etc., but due to the degree of freedom mentioned above, arm 5
1.52 and 53° 54 cause runout and runout, and there is a limit to the improvement of finishing accuracy by rolling, and if repeated rolling is performed, the above-mentioned swing arm 5
Arms 51, 52 and 53° 54 with 5 degrees of freedom
There is a risk that the position reproducibility of

In addition, since the position of arms 51, 52 and 53, 54 is controlled by cylinder 63 when they are opened, the number of cylinders increases, and the structure becomes complicated due to the piping process, and equipment costs increase. This results in a rise in prices.

The present invention was made in view of the above problems.
The purpose is to provide a structure that is simple in structure but capable of always positioning and holding the arm in a predetermined position, and in particular improves the reproducibility of the arm position and improves processing accuracy. It is in.

Means for Solving the Problems As described above, the present invention is to sandwich the journal part of the crankshaft from the radial direction between a pair of arms that can be opened and closed, and to rotate the crankshaft while rotating the journal part of the crankshaft. In the apparatus for rolling the fillet part of the journal part, there is provided a swinging arm that supports a pair of arms so as to be openable and closable, and an end connected to one arm and the other end connected to the other arm. a pressurizing cylinder that opens and closes the arm; a support that supports the swing arm so that it can swing around an axis parallel to the center of rotation of the arm; and a support body that contacts the arm to regulate the position when the arm is opened. and a fixed stopper plate provided on both sides of the swinging arm to apply biasing forces that are mutually antagonistic in the swinging direction to the swinging arm to hold the swinging arm at a neutral position in the swinging direction. and a pair of swing arm biasing means.

According to this structure, although the swinging arm has the same degree of freedom in the axial direction as before, the pair of swinging arm biasing means always exerts a force that directs the arm toward the neutral position. It becomes possible to sufficiently counter the escape and swing of the Further, when the arms are opened, the pair of arms are restrained at a fixed position by the stopper plate, and the swing arm is held at the neutral position by the swing arm biasing means described above.

Embodiment Rod Figures 1 to 3 are diagrams showing an embodiment of the present invention, where Cs is a crankshaft, and Jl, J2... are fillet portions F.
P is a crank pin.

The crankshaft Cs is supported at both ends by a center S and is driven to rotate.

[ is a base that is the center of the device, 2, 2... are a plurality of support blocks as supports fixed to the base 1 according to the number of journal parts Jl, J2..., and each support block 2, A pair of arms 4 and 5 are supported via a swing arm 3. A pair of arms 4, 5 are rotatably hinged to the shaft 6 of the swinging arm 3, as shown in FIG.
It opens and closes by the function of a pressure cylinder 7 connected between the ends of the roller 5, and the pressure cylinder 7 serves to apply pressure during rolling, which will be described later.

A roller holder 8 is attached to the tip of one arm 4, and journal parts Jl and J2 are attached to the tip of the other arm 5.
A work rest 9 is attached that comes into contact with the outer peripheral surface of... The roller holder 8 has journal parts Jl and J2.
Fillet roller I corresponding to fillet portion F of...
O is rotatably supported, and as will be described later, the work rest 9 is connected to the journal portion J1. On the outer peripheral surface of J2...
The fillet roller IO is connected to the journal portion J1. J2...
Rolling is performed while being pressed against the fillet portion F of each.

A stopper block 11 inclined at a predetermined angle is attached to the upper surface of one arm 5, and on the other hand, each arm 5, 5...
A long stopper plate 12 shared by the stopper blocks 11 is attached via a bracket 13. When the arms 4.5 open, the stopper block 11 comes into contact with the stopper plate 12, causing the arms 4, 5 to open.
The opening degree of the valve is regulated.

As shown in FIG. 5, the swing arm 3 is rotatably supported by a support block 2 as a support via a shaft 14 parallel to the shaft 6 on the arm 4.5 side. It has rotational freedom in direction.

Spring plunger units 15 as swing arm biasing means are individually provided on both sides of the support block 2 with the swing arm 3 in between.

As shown in FIG. 6, the spring plunger unit 15 has a plunger 18 biased by a coil spring 17 slidably mounted inside the lower end of a holder 16 fixed to the support block 2. 1
The tips of the arms 8 are in pressure contact with the sides of the swing arm 3, respectively, so as to face each other.

In other words, although the swinging arm 3 has a degree of freedom of rotation around the shaft 14, in normal conditions it is not As shown in FIG. 1, the swing arm 3 is held at a neutral position, that is, a position where the longitudinal axis of the swing arm 3 is vertical.

In the fillet rolling device configured as described above, as shown in FIGS. 1 and 2, the pressure cylinder 7 is extended and the pair of arms 4.5
．． J2... is sandwiched between the work rest 9 and the fillet roller 10 on the outer peripheral surface of the journal portion Jl, J2...
are pressed against the fillet portions F of the journal portions l1゜J2..., respectively, and the crankshaft Cs is driven to rotate. When the crankshaft C8 rotates, the fillet roller 10 moves along the fillet portion F, thereby performing rolling.

At this time, when the arms 4 and 5 are open, the stopper block 11 comes into contact with the stopper plate 12, and the arms 4 and 5 are opened.
, 5 are regulated, so when the pressure cylinder 7 is extended as described above, the stopper block 11
The frictional force between the arm 4 and the stopper plate 12 acts as resistance, and one arm 4 starts to move first. Then, only when the arm 4 comes into contact with the journal parts Jl, J2, . . . , the other arm 5 starts to move, and the journal parts Jl, J2, .

Also, the swing arm 3 supporting the arms 4 and 5 is connected to the shaft 1.
Although the swinging arm 3 has a rotational degree of freedom around 4, the swinging arm 3 is exerted with a force directed toward the neutral position by the pair of spring plunger units 15, so that it cannot sufficiently resist the reaction force caused by rolling. In addition, for machining errors or misalignment of the fillet portion F, the swinging arm 3 swings and displaces against the restraining force of the spring plunger unit 15, absorbing the above-mentioned errors, etc. ．． Arm 4°5 smoothly follows the rotational movement of J2....

When the rolling is completed, wait until the crankshaft C8 stops at the fixed angle position, and then the pressurizing cylinder 7 is operated to open the arms 4 and 5, and the arms 4 and 5 are moved so that the stopper block 11 hits the stopper plate 12. By contacting them, the opening position is regulated, and at the same time, the swing arm 3 is held at the neutral position by the action of the spring plunger unit 15.

Effects of the Invention As described above, according to the present invention, even though the swinging arm has a degree of rotational freedom, a force that always directs the swinging arm toward the neutral position is applied by the swinging arm biasing means, so that the rolling reaction force is reduced. It is possible to sufficiently counter the problems, prevent the arm from escaping or swinging, and improve the finishing accuracy of rolling. In addition, in conjunction with the above-mentioned neutral position synchronization of the swinging arm, the opening position of the arm is regulated by the stopper plate, which improves the reproducibility of the arm position, making it easier to set the workpiece, and improve machining. It can greatly contribute to improving accuracy.

In addition, since no cylinder other than the pressurizing cylinder is required as a means for regulating the position of the arm, there is an advantage that the structure can be simplified and equipment costs can be suppressed.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing one embodiment of the present invention, FIG.
The left side view of the figure, Figure 4 is a sectional view taken along line AA in Figure 1,
Fig. 5 is a sectional view taken along line B-B in Fig. 1, Fig. 6 is an enlarged sectional view of the spring plunger unit, Fig. 7 is an explanatory diagram of the configuration of a conventional rolling device, and Fig. 8 is FIG. 7 is an enlarged sectional view of the main part of FIG. 7; 2... Support block as a support body, 3... Swinging arm, 4.5... Arm, 6.14... Axis, 7...
・Pressure cylinder, 9... Work rest, 10... Fillet roller, I2... Stopper plate, 15.
...Spring plunger unit as swinging arm biasing means, 17...Coil spring, 18...Plunger, C8...Crankshaft, F...Fillet portion, Jl, I2...Journal portion. 8C4) Figure Figure Figure 6 5 Figure 2

Claims (1)

[Claims] (1) The journal part of the crankshaft is sandwiched from the radial direction by a pair of arms that can be opened and closed, and the fillet part of the journal part is rolled by a fillet roller attached to the tip of the arm while rotating the crankshaft. A swinging arm that supports a pair of arms so as to be able to open and close; a pressurizing cylinder that has one end connected to one arm and the other end connected to the other arm to open and close both arms; A support body that supports the swinging arm so that it can swing around an axis that is parallel to the center of rotation of the arm, a fixed stopper plate that comes into contact with the arm and regulates the position of the swinging arm when the arm is opened, and a pair of swinging arm biasing means provided on both sides and applying biasing forces that are mutually antagonistic to the swinging arm in the swinging direction to hold the swinging arm at a neutral position in the swinging direction; A fillet rolling device characterized by: