JPS64277Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a backup device for a fillet roller device of a crankshaft such as an engine.

<Prior Art> The fillet portions of the journal and pin portions of crankshafts are rolled to improve their strength. A conventional fillet roller device, as shown in Japanese Patent Application Laid-open No. 117849/1984, has a pair of swing arms that can be opened and closed and hold fillet rollers that roll the fillet portion of the pin portion (or journal portion) of the crankshaft. A large number of rollers are provided corresponding to the pitch of the pin section (or journal section), and the fillet section of each pin section (or journal section) is rolled at the same time. The fillet roller is oscillated via a plate by a master crankshaft corresponding to the crankshaft to be machined.

This conventional device uses a master crankshaft that is suitable for the crankshaft to be machined to swing the fillet roller, so it cannot handle various crankshafts with different longitudinal pitches of the pin portions (or journal portions). It was necessary to replace the master crankshaft and to change the axial positions of a large number of swing arms that held fillet rollers, and there was a problem in that it required a considerable amount of time to change the setup when a different type of crankshaft was hooked to the rollers.

In order to solve this problem, recently the swing arm is indexed to the journal part or pin part of various crankshafts by numerical control commands, the fillet roller is pressurized to the fillet part, and the rotation of the crankshaft causes the fillet roller to move to the fillet part. A master crankless fillet roller device is being developed that rotates and rotates to apply fillet rolls.

<Problems to be solved by the invention> In the above master crankless fillet roller device, 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. However, there was a problem that the roller holder tended to fall during pressing, making it impossible to obtain the necessary pressing force for rolling. In order to solve this problem, it is satisfactory to use a back-up mechanism that prevents the roller holder from falling.However, depending on the position of the roller holder, which changes depending on the front side journal of the crankshaft, It is necessary to change the backup location.

The present invention provides a backup device that backs up a roller holder, prevents the roller holder from falling down, and can automatically change the backup position in accordance with various crankshafts.

<Means for Solving the Problem> The present invention includes a movable base that is movable along the axial direction of a crankshaft rotatably supported between a headstock and a tailstock by a drive device, and a A pair of swing arms pivoted to the base so that they can be opened and closed,
In this fillet roller device equipped with a fillet roller held by the swing arm, a support rod that contacts the roller holder of the swing arm is provided on the tailstock side so as to be movable in the axial direction of the crankshaft, and the support rod is moved back and forth. a position detection device that detects the position of the roll holder that changes according to various crankshafts and stops the operation of the drive device, and a lock mechanism that locks the support rod in a predetermined position. It is.

<Operation> The above means of the present invention operates as follows. The movable base is moved according to numerical control commands to correspond to the fillet part of the journal part at one end of the crankshaft, and the swing arm is indexed and positioned. Thereafter, the support rod is advanced, and when its tip comes into contact with the roller holder, the forward movement of the support rod is stopped by a position detection signal from the position detection device, and the support rod is locked by the lock mechanism.

<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. A main shaft 4 having a horizontal axis is supported on one of the columns 2 so as to be rotationally driven and angularly controllable by a drive motor (not shown). 5 is a chuck provided at the end of the main shaft 4. 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 guide base 7 is fixed between the upper surfaces of the columns 2 and 3, and a guide rail 8 extending along the axial direction of the crankshaft W is provided on the horizontal surface of the upper surface of the guide base 7. A movable base 9 is guided on the guide rail 8 so that it can be moved in accordance with numerical control commands. 10 is the movable base 9
The ball screw 11 is rotated by a servo motor that feeds and moves the nut 12 fixed to the bottom surface of the movable base 9.
It is screwed together.

A pair of support plates 1 are provided on the lower surface of the movable table 9.
3 is installed vertically. The support plate 13 includes a first swing arm 14a and a second swing arm 1 that are swingable around the axis of the crankshaft W.
4b is supported.

The first swing arm 14a is shown in FIGS. 2 and 3.
As shown in the figure, an upper swing arm 15 and a lower swing arm 16 are pivotally supported by a support shaft 17 parallel to the axis of the crankshaft W so as to be openable and closable. As shown in FIG. 4, at the tip of the upper swing arm 15, a fillet roller 31 facing one fillet portion of the journal portion JE at one end of the crankshaft W is held via a parent roller 30 and a roller holder 29. A roller 32 is held at the tip of the lower swing arm 16 and comes into contact with the journal section JE. Further, an opening/closing and pressurizing cylinder 18 (hereinafter referred to as a pressurizing cylinder) is installed between the rear ends of the upper swing arm 15 and the lower swing arm 16. 19
is a cylinder for regulating the open angle position of the upper swing arm 15 and the lower swing arm 16.

The second swing arm 14b also has an upper swing arm 22 and a lower swing arm 23 attached to a support shaft 24.
It is pivoted so that it can be opened and closed. And this upper swing arm 22 and lower swing arm 2
There is a journal part J (or pin part) at the tip of 3.
Fillet roller 3 facing both fillet portions of
3 and 34 are retained. The opening/closing, pressurizing and opening angle position regulating means of the upper swing arm 22 and the lower swing arm 23 are not shown, but they are the same mechanisms as the upper swing arm 15 and the lower swing arm 16.

The support mechanism for the first and second swing arms 14a and 14b is as shown in FIG.
b is swingably supported by a cylindrical fixed shaft 21 fixed to one support plate 13. The first swing arm 14a has one end fitted into the fixed shaft 21 so as to be slidable in the axial direction and prevented from rotating, and a support shaft 2 supported between the pair of support plates 13 so as to be axially movable.
is swingably supported on 0. And support shaft 2
0 is threadedly engaged with a feed screw 27 which is rotated at a required angle by a motor 25 and an encoder 26 fixed to the other support plate 13, and is axially moved by the lead of this feed screw 27 to perform the first oscillation. The distance between the arm 14a and the second swing arm 14b can be automatically adjusted. 28 is a spring for removing bumps provided at the tip of the support shaft 20.

In the fillet roller device having the above structure, as shown in FIG. 4, a support rod 35 is provided on the tailstock 6 side so as to be movable in the axial direction of the crankshaft W. More specifically, a cylindrical holder 36 is fixed in the axial direction of the crankshaft W close to the tailstock 6, and the support rod 35 is fitted into the holder 36 so as to be movable forward and backward. A cylinder device 37 for advancing and retracting the support rod 35 is provided at the rear end of the holder 36, and a roller holder at the end of the upper swing arm 15, which is pivotally supported by the first swing arm 14a, is provided at the tip of the support rod 35. A stop 38 is provided which comes into contact with 29. The center portion of this stopper 38 has an air jet hole 39 to which an air supply circuit 46 is connected. Additionally, a pressure detector 40 is connected to the air supply circuit 46 to detect when the abutment 38 comes into contact with the roller holder 29 and the air jet hole 39 is blocked, causing the air pressure to rise to a certain level. has been done.

41 is a locking mechanism for the forward movement position of the support rod 35. This lock mechanism 41 has a V-shaped long groove 42 in the axial direction on the support rod 35, and a piston 44 of a cylinder 43 fixedly attached to the holder 36.
It has a structure in which a wedge shaft 45 that wedges into the long groove 42 is provided.

This lock mechanism 41 is operated by a signal from the pressure detector 40, and the cylinder device 37 for advancing and retracting also stops its operation by a signal from the pressure detector 40.

Next, the operation of the above embodiment will be explained.

The upper swing arm 22 and lower swing arm 23, which are pivotally supported by the second swing arm 14b, roll the fillet portions on both sides of the journal J. (It is also possible to roll the fillet portions on both sides of the pin portion.) In other words, the movable base 9 is fed and moved in accordance with numerical control commands, and the upper swing arm 2 is attached to the journal J.
2. Index and position the lower swing arm 23, and press the fillet roller 3 with the pressure cylinder.
3 and 34 are pressed against the fillet portions on both sides, and the crankshaft W is rotated. This crankshaft W
The rotation of the fillet rollers 33 and 34 rotates and performs rolling. Incidentally, when rolling the journal part J excluding the journal part JE and the adjacent journal part J, the upper swing arm 15 and the lower swing arm 16 for one side fillet, which are pivotally supported by the first swing arm 14a, are used.
remains open. Also support rod 35
is located at the retreating end.

When rolling the journal part JE having a fillet part only on one side of one end of the crankshaft W, the upper swing arm 1 pivotally supported on the first swing arm 14a is moved by the feeding movement of the movable base 9.
5. Attach the lower swing arm 16 to the journal section JE.
Index and position. After that, the pressure cylinder 18 presses the fillet roller 31 against the fillet portion on one side, and the roller 32 presses against the fillet portion on one side.
Press against JE. Then, the advancing/retracting cylinder device 3
7, the support rod 35 is advanced to bring the stopper 38 into contact with the roller holder 29. When the stopper 38 comes into contact with the roller holder 29, it is detected by the pressure detector 40.
is detected, and at the same time the movement of the advancing/retracting cylinder device 37 is stopped, the locking mechanism 41 is actuated, and the support rod 35 is placed in the locked state. Thereafter, by rotating the crankshaft W, the fall of the roller holder 29 is prevented by contact with the support rod 35,
The fillet portion on one side is rolled.
In addition, at the same time as rolling this one-sided fillet part, the journal part J adjacent to the journal part JE is rolled.
The fillet portions on both sides of the second swing arm 14b are connected to the upper swing arm 22 and the lower swing arm 2 of the second swing arm 14b.
3 allows for rolling.

<Effects of the invention> According to the invention, when rolling the fillet portion on only one side, the support rod prevents the roller holder from falling down, so the force necessary for fillet rolling is secured and ,
The support rod can move forward and backward, and when it comes into contact with the flora holder, it detects this and automatically stops the forward movement and locks it, so it can be used with various cranks that change the position of the roller holder. The versatility of being able to accommodate the backup position of the roller holder relative to the shaft is a great advantage.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of the present invention, Fig. 2 is an enlarged sectional view taken along the line of Fig. 1, Fig. 3 is a sectional view taken along the line of Fig. 2, and Fig. 4 is a sectional view of essential parts of the device of the present invention. . 4a... Headstock, 6... Tailstock, 9... Movable base, 14a... First swing arm, 15... Upper swing arm, 16... Lower swing arm, 1
7... Support shaft, 29... Roller holder, 31... Fillet roller, 35... Support rod, 37...
Cylinder device for advancing and retracting, 38...Weight, 40...Pressure detector, 41...Lock mechanism.

Claims (1)

[Scope of utility model registration request] A movable stand movable along the axial direction of a crankshaft rotatably supported between a headstock and a tailstock by a drive device, and a pair of swing arms pivoted to the movable stand so as to be openable and closable. and a fillet roller held by the swing arm, a support rod is provided on the tailstock side for abutting against the roller holder of the swing arm so as to be movable back and forth in the axial direction of the crankshaft. The roll holder is equipped with a drive device that moves the roll holder forward and backward, a position detection device that detects the position of the roll holder that changes depending on various crankshafts, and stops the operation of the drive device, and a lock mechanism that locks the support rod at a predetermined position. A backup device for a fillet roller device, characterized in that: