JPH0729264B2 - Fillet roll hanging device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fillet rolling device that rolls 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 in, for example, Japanese Patent Application Laid-Open No. 61-19561. As shown in FIG. 7 and FIG. 8, this device can open and close a pair of arms 51, 52 and 53, 54 which press the journal portions J1, J2 of the crankshaft Ds from above and below on the swing arm 55. And a swing arm 55 is swingably supported on a support plate 56 via a shaft 57. Then, when the crankshaft Cs is rotated by extending the pressurizing cylinder 58 and sandwiching the journal portions J1 and J2 with the pair of arms 51, 52 and 53, 54, as shown in FIG. The fillet rollers 59 and 62 at the tips of 52 and 53 and 54 roll to roll the fillet portions F of the journal portions J1 and J2. In addition, the crank pin P
Also, the different arms 60 and 61 are simultaneously rolled.

When the arms 51, 52 and 53, 54 are opened, the cylinder 63 is actuated so that the arms 51, 52 and 53, 54 are regulated at equal opening positions about the journal portions J1, J2.

Problems to be Solved by the Invention In the above structure, since the swing arm 55 has a degree of freedom with the shaft 57 as the center of rotation, there is an advantage that the processing error of the journal portions J1, J2 can be absorbed. Because of the above degrees of freedom, the reaction force at the time of rolling causes the arms 51, 52 and 53, 54 to escape or shake, and there is a limit to the improvement of finishing processing accuracy by rolling, and repeated rolling was performed. In this case, the positional reproducibility of the arms 51, 52 and 53, 54 may decrease due to the degree of freedom of the swing arm 55 described above.

In addition, since the position of the arms 51, 52 and 53, 54 is restricted by the cylinder 63 when the arms are opened, the number of cylinders increases, and the piping process complicates the structure and reduces the equipment cost. This will result in soaring prices.

The present invention has been made in view of the above problems,
An object of the invention is to provide a structure which, despite its simple structure, can always position and hold the arm at a predetermined position, and in particular, improves the position reproducibility of the arm and improves the machining accuracy. It is in.

Means for Solving the Problems The present invention, as described above, sandwiches a journal portion of a crankshaft from a radial direction by a pair of arms that can be opened and closed, and a fillet roller attached to the tip of the arm while rotating the crankshaft. In a device in which the fillet portion of the journal portion is rolled, a swinging arm that supports a pair of arms so as to be openable and closable, and one end is connected to one arm and the other end is connected to the other arm. Pressure cylinder that opens and closes the arm, a support body that swingably supports the swing arm around an axis parallel to the rotation center of the arm, and a position that abuts on the arm and regulates the position when the arm is opened. A fixed stopper plate and a biasing arm that is provided on both sides of the swing arm and that counteracts the swing arm in the swing direction. And a pair of swing arm biasing means for applying a force to hold the swing arm at a neutral position in the swing direction.

Operation According to this structure, the swing arm has the degree of freedom in the axial direction as in the conventional case, but the pair of swing arm biasing means always exerts a force for directing the neutral position. You will be able to fully counter the escape and swing of the. Further, when the arms are opened, the pair of arms is 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.

Embodiment FIG. 1 to FIG. 3 are views showing an embodiment of the present invention, in which Cs is a crankshaft, J1, J2 ... Are journal parts in which a fillet part F is formed, and P is a crankpin. Both ends of the crankshaft Cs are supported by the center S and are driven to rotate.

1 is the base that is the center of the device, 2, 2 ... is the journal section J1,
A plurality of support blocks as a support body fixed to the base 1 according to the number of J2 ..., and a pair of arms 4 and 5 are supported on each support block 2, 2 ... .
The pair of arms 4 and 5 are rotatably hinged to the shaft 6 of the swing arm 3 as shown in FIG. 4, and these arms 4 and 5 are connected between the ends of the arms 4 and 5. The pressure cylinder 7 serves to open and close by the action of the pressure cylinder 7 and to apply a pressure force when the pressure cylinder 7 is rolled, which will be described later.

A roller holder 8 is attached to the tip of one arm 4, and a work rest 9 that comes into contact with the outer peripheral surfaces of the journals J1, J2 ... Is attached to the tip of the other arm 5. The roller holder 8 rotatably supports a fillet roller 10 corresponding to the fillet portion F of the journal portions J1, J2, and the work rest 9 is provided on the outer peripheral surface of the journal portions J1, J2, ... Rolling is performed with the roller 10 being pressed against the fillet portions F of the journal portions J1, J2 ,.

A stopper block 11 tilted at a predetermined angle is attached to the upper surface of one arm 5, and on the other hand, a long length shared by the stopper blocks 11 of the arms 5, 5 ... Corresponding to the stopper block 11 on the base 1 side. Stopper plate 12 is attached via a bracket 13. Then, when the arms 4 and 5 are opened, the stopper block 11 comes into contact with the stopper plate 12 to regulate the opening degree of the arms 4 and 5.

As shown in FIG. 5, the swing arm 3 is rotatably supported by a support block 2 as a support through a shaft 14 parallel to the shafts 6 on the arms 4 and 5, and is the same as the arms 4 and 5. It has the freedom of rotation in any direction.

The support block 2 is provided with a spring plunger unit 15 as an oscillating arm urging means on both sides of the oscillating arm 3 individually. As shown in FIG. 6, the spring plunger unit 15 has a coil spring inside the lower end of the holder 16 fixed to the support block 2.
A plunger 18 urged by 17 is slidably mounted, and the tips of the plungers 18 are pressed against the side surfaces of the swing arm 3 so as to face each other.

That is, although the swing arm 3 has a degree of freedom of rotation about the shaft 14, the spring plunger unit 15
As shown in FIG. 1, the plungers 18 are pressed against each other so that they are opposed to each other, so that the plungers 18 are normally held in the neutral position, that is, in the position where the longitudinal axis of the swing arm 3 is vertical. There is.

In the fillet roll hanging device configured as described above, the pressurizing cylinder 7 is extended as shown in FIGS. 1 and 2 and the journal portions J1, J2 ...
, The work rest 9 on the outer peripheral surface of the journal parts J1, J2, and the fillet roller 10 on the journal parts J1, J2.
The crankshaft Cs is rotationally driven after being pressed against the respective fillet portions F of. When the crankshaft Cs rotates, the fret roller 10 rolls along the fillet portion F, so that the fret roller 10 is rolled.

At this time, when the arms 4 and 5 are open, the stopper block 11 abuts on the stopper plate 12 and the opening position of the arms 4 and 5 is regulated. Therefore, the pressing cylinder 7 is extended as described above. Then, the frictional force between the stopper block 11 and the stopper plate 12 becomes a resistance and the one arm 4 starts to move first. And the arm 4 is the journal part J
Only when it abuts on 1, J2 ...
Both arms 4 and 5 will sandwich the journal part J1, J2 ....

Further, although the swing arm 3 supporting the arms 4 and 5 has a rotation degree of freedom about the shaft 14, the swing arm 3 has a force to direct the neutral position by the pair of spring plunger units 15. Since it works, the swing arm 3 resists the restraining force of the spring plunger unit 15 against the processing error of the fillet portion F or the misalignment. By oscillating displacement, the above errors are absorbed, and journal parts J1, J
Arms 4 and 5 smoothly follow the rotational movement of 2.

When the rolling is completed, the pressurizing cylinder 7 operates by waiting for the crankshaft Cs to stop at the constant angle position, the arms 4 and 5 are opened, and the arms 4 and 5 are stopper blocks.
The contact position of the stopper plate 12 with the stopper plate 12 restricts its opening position, 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, since the swing arm urging means always exerts the force for directing the neutral position even though the swing arm has the rotational degree of freedom, the roll hooking reaction force is applied. Against this, it is possible to prevent the arm from escaping or swinging, and improve the finishing accuracy of the roll hooking. In addition, the opening position of the arm is regulated by the stopper plate in combination with the neutral position directivity of the swinging arm as described above, so that the arm position reproducibility is good and the work can be easily set and the machining can be performed. It can greatly contribute to the improvement of accuracy.

In addition, since a cylinder other than the pressurizing cylinder is not required as a means for regulating the position of the arm, there is an advantage that the facility cost can be suppressed while the structure is simplified.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention, FIG. 2 is an enlarged explanatory view of a main part of the same in a rolled state, and FIG.
Fig. 4 is a left side view of the drawing, Fig. 4 is a sectional view taken along the line AA of Fig. 1, Fig. 5 is a sectional view taken along the line BB of Fig. 1, and Fig. 6 is an enlarged view of the spring plunger unit. FIG. 7 is a cross-sectional view, FIG. 7 is a configuration explanatory view of a conventional fillet roll hanging device, and FIG. 8 is an enlarged cross-sectional view of a main part of FIG. 2 ... Support block as a support, 3 ... Swing arm, 4,5 ... Arm, 6,14 ... Shaft, 7 ... Pressure cylinder, 9 ... Work rest, 10 ... Fillet roller, 12
...... Stopper plate, 15 ...... Spring plunger unit as oscillating arm urging means, 17 ...... Coil spring, 18 ...... Plunger, Cs ...... Crank shaft,
F: Fillet section, J1, J2: Journal section.

Claims (1)

[Claims] 1. A crank part of a crankshaft is sandwiched by a pair of arms that can be opened and closed from the radial direction thereof, and a rolllet is attached to the fillet part of the journal part by a fillet roller attached to the tip of the arm while rotating the crankshaft. In the device configured to perform, a swinging arm that supports a pair of arms so that the arms can be opened and closed, and a pressure 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 the swinging arm can swing about an axis parallel to the rotation center of the arm, a fixed stopper plate that abuts on the arm and restricts the position when the arm is opened, swinging Swing arms provided on both sides of the arm for giving a biasing force to the swing arm that counteract each other in the swing direction. Standing pair of swing arms urging means for holding the position, the fillet rolling apparatus comprising the city.