JPH0224609Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a crankshaft fillet roll processing device.

<Prior Art> In an engine crankshaft, the fillet portions of the journal and pin portions are rolled to improve strength. A conventional fillet roll processing device, as shown in Japanese Patent Application Laid-Open No. 117849/1984, has a pair of openable and closable fillet rollers that roll the fillet portion of the pin portion (or journal portion) of the crankshaft. The structure is such that the swing arm is swung via a plate by a master crankshaft corresponding to the crankshaft to be machined.

In addition, the fillet roller is pressurized against the fillet part, and the crankshaft supported between the headstock and the tailstock rotates to automatically rotate the fillet roller following the fillet part, thereby applying the fillet roll to the master crankless fillet roll processing. A device has also been developed.

<Problems to be solved by the invention> In the fillet roll processing device described above, the fillet part of the journal part on the front side of the crankshaft (the side where the drive gear of the engine accessories is fitted) is only on one side. , there is a problem that the roller holder tends to fall during processing, making it impossible to obtain the necessary pressure for rolling. To solve this problem, a bracket is fixed to the tailstock side that supports the front side of the crankshaft. However, a backup mechanism is used to prevent the roller holder from falling over, which is provided with a backup abutment against which the roller holder comes into contact. However, this back-up mechanism has a back-up configuration with only the roller holder on the upper swing arm side due to the existence of the carry-in/out arm that rotates to carry the workpiece in and out between the headstock and the tailstock. The roller holder is not equipped with a backup mechanism. Therefore, there was a problem that the pressing force of the fillet roller on the lower swing arm side was insufficient.

<Means for Solving the Problems> In order to solve the above problems, the present invention provides an axis parallel to the crankshaft axis above the crankshaft rotatably supported between the headstock and the tailstock. An upper swing arm and a lower swing arm are pivotally supported to be able to open, close, and swing on a support shaft arranged in In a fillet roll processing device equipped with a workpiece loading/unloading arm that rotates around a rotating shaft arranged along an axis,
A corresponding back-up pad is fixed on the tailstock side in a direction parallel to the axis of the lower swing arm roller holder and the crankshaft, with a gap corresponding to the width dimension of the workpiece loading/unloading arm. The workpiece loading/unloading arm is interposed in the gap between the dowel and the roller holder.

<Function> In the present invention, the roller holder of the upper swing arm comes into contact with the back-up abutment on the upper side that is already provided, and the roller holder of the lower swing arm contacts the loading/unloading arm that carries the crankshaft to the processing position. is inserted into the gap between the lower back-up abutment and the roller holder, and the back-up abutment backs up against the fall of the roller holder via the loading/unloading arm.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, 1 is a bed, and 2 and 3 are columns fixed on the bed 1. One of the columns 2 is provided with a headstock consisting of a main shaft 4 with a horizontal axis and a chuck 5 provided at the end of the main shaft 4, which can be rotated and controlled by an unillustrated drive motor. . The other column 3 is provided with a tailstock 6, and a crankshaft W is supported between the chuck 5 and the tailstock 6.

A support shaft 7 is arranged above the crankshaft W supported between the chuck 5 and the tailstock 6 with an axis parallel to the axis of the crankshaft W, and a swing arm 8 is attached to the support shaft 7 along the support shaft 7 line. It is supported so that it can swing around. The swing arm 8 has an upper swing arm 9 and a lower swing arm 10 that are swingable around the axis of the crankshaft W and are pivotably opened and closed by a support shaft 11 that is parallel to the axis of the crankshaft W. has been done.

As shown in FIG. 3, at the tip of the upper swing arm 9, a fillet roller 14 is held via a parent roller 15 and a roller holder 12, facing one fillet portion of the journal at one end of the crankshaft W. A fillet roller 16 facing the fillet portion is also held at the tip of the swing arm 10 via a parent roller 17 and a roller holder 13. Additionally, between the rear ends of the upper swing arm 9 and the lower swing arm 10, there is a cylinder 18 for opening/closing and pressurizing.
(hereinafter referred to as a pressurizing cylinder) is attached. A movable shaft 20 guided in the vertical axis direction by a fixed guide 19 is engaged with the rear end of the upper swing arm 9, and has a spring 21 that always urges the movable shaft 20 upward. During machining, the movable shaft 20 has upper and lower swing arms 9,
10 is allowed to float, and when opened, the upper and lower swing arms 9, 10 are positioned at fixed positions.

Further, a workpiece loading/unloading device for loading/unloading the crankshaft W between the outside of the machine and the processing position is provided. The configuration of this workpiece loading/unloading device is as follows. A rotation shaft 24 is disposed below the crankshaft W supported between the chuck 5 and the tailstock 6, with an axis parallel to the axis of the crankshaft W. A pair of loading/unloading arms 22 corresponding to two positions:
a and 22b are fixedly installed. As shown in FIG. 2, a recess 23 for supporting the crankshaft W is formed at the upper end of the loading/unloading arms 22a, 22b. The shaft W is carried in and carried out, and by turning to the processing position B, the crankshaft W is positioned between the chuck 5 and the tailstock 6. The rotating mechanism of the loading/unloading arms 22a, 22b includes a rotating lever 28 at one end of the rotating shaft 24.
A cylinder 25 for rotating the loading/unloading arm is secured to a bracket 26 fixed to the outer surface of the column 3. The structure is such that a cylinder 25 for rotating the loading/unloading arm and a rotating lever 28 are connected via a movable block 27.

A bracket 29 is fixed to the tailstock 6 above the center axis, and a backup stopper 30 is fixed to the tip of the bracket 29, with which the roller holder 12 of the upper swing arm 9 comes into contact.

Further, a bracket 31 is fixed to the tailstock 6 below the center axis, and the roller holder 13 of the lower swing arm 10 is attached to the tip of the bracket 31.
A corresponding backup pad 32 is fixed with a gap in a direction parallel to the axis of the crankshaft W. The gap between the back-up pad 32 and the roller holder 13 is set to a size that is sufficient for the loading/unloading arm 22b on the tailstock 6 side to intervene and be sandwiched, that is, the width dimension of the loading/unloading arm 22b. has been done. The upper end of the loading/unloading arm 22b is partially inserted into the gap even when the loading/unloading arm 22b is at the external rotation position A, and a wide area portion is positioned in the gap when the loading/unloading arm 22b is rotated to the machining position B. A protruding piece 33 is formed.

Next, the operation of the above configuration will be explained. The crankshaft W to be machined is supported in the recessed portions at the upper ends of the carry-in and carry-out arms 22a and 22b, which are pivoted to the external rotation position A. In addition, the upper swing arm 9
and the lower swing arm 10 is open. In this state, the loading/unloading arms 22a and 22b turn inward to carry the crankshaft W into the processing position B between the chuck 5 and the tailstock 6, and one end of the crankshaft W is supported at the center of the tailstock 6. , the other end is chucked by chuck 5. Said tailstock 6
One end of the crankshaft W supported at the center is the front side, and the journal portion is only a fillet portion on one side.

The loading/unloading arm 22 pivoted to the processing position B
Loading/unloading arm 22 on the tailstock 6 side with a and 22b
One side of the protruding piece 33 a comes into contact with the backup stopper 32 .

Next, the upper swing arm 9 and lower swing arm 10 are closed by actuation of the pressure cylinder 18, and the fillet rollers 14 and 16 are pressed against the fillet portion on one side. When the upper swing arm 9 and the lower swing arm 10 are closed, the roller holder 12 of the upper swing arm 9 directly contacts the backup stopper 30, and the roller holder 13 of the lower swing arm 10 contacts the backup stopper 32. The loading/unloading arm 22b is brought into contact with the loading/unloading arm 22b. In other words, the roller holder 13 of the lower swing arm 10 is indirectly backed up by the backup pad 32 via the protrusion 33 of the loading/unloading arm 22b.

In this way, the upper and lower roller holders 12 and 13
The crankshaft W is rotated by the rotation of the main shaft 4 with the back-up state, and the fillet portion on one side is rolled.

<Effects of the invention> As described above, according to the invention, the roller holder of the lower swing arm, which rolls one fillet of the journal portion at one end of the crankshaft, is brought into contact with the back-up stop via the workpiece loading/unloading arm. Since the roller holder of the lower swing arm is also capable of backing up to prevent it from falling down, there is an effect that the fillet portion on one side can be reliably applied with a pressure roll by the upper and lower fillet rollers.

[Brief explanation of the drawing]

FIG. 1 is a front view of the device of the present invention, FIG. 2 is a side view of the main part of the invention, and FIG. 3 is a sectional front view of the main part of the invention. 5...Chuck, 6...Tailstock, 7...Support shaft, 8...Swing arm, 9...Upper swing arm, 10...Lower swing arm, 12, 13...
...Roller holder, 14, 16... Fillet roller, 22a, 22b... Loading/unloading arm, 24...
... Rotation axis, 30, 32 ... Backup reserve,
33... Protrusion.

Claims (1)

[Scope of utility model registration request] The upper swing arm and the lower swing arm can be opened, closed, and swung on a support shaft that is arranged with an axis parallel to the crankshaft axis above the crankshaft that is rotatably supported between the headstock and tailstock. A fillet roll that is pivotally supported, has a fillet roller held by both swing arms, and has a workpiece loading/unloading arm that rotates by a rotating shaft arranged below the crankshaft with an axis parallel to the axis of the crankshaft. In the processing device, a distance corresponding to the width dimension of the workpiece loading/unloading arm is provided on the tailstock side in a direction parallel to the axis of the lower swing arm roller holder and the crankshaft.
1. A fillet roll processing device, characterized in that a corresponding back-up stop is fixedly installed with a corresponding back-up stop, and a workpiece loading/unloading arm is interposed in the gap between the back-up stop and the roller holder.