JPS636296B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention involves arranging rack-type dies in parallel in multiple stages to roll one gear, moving the gear to be rolled every round trip or every one way, and rolling a large modular gear. This invention relates to a multi-stage rolling device for a precision rolling machine that enables rolling.

A rolled gear is rotatably supported in the circumferential direction at the center, and the gear is positioned above and below the rolled gear from the left and right, almost parallel to the axial center surface of the rolled gear, and almost point symmetrical with respect to the axial center of the rolled gear. Gear rolling using a conventional rack-type rolling machine, which has a pair of die devices that reciprocate, completes gear rolling in one step each way of the die.
It has been impossible to roll large modules due to restrictions on the rolling allowance per die blade and the length of the die.

In order to improve this limitation, the present invention arranges rack-shaped dies in parallel on the die device mounting base,
Each reciprocation of the die device, the gear to be rolled is moved by the width of the die to sequentially perform rolling. Another object of the present invention is to provide a multi-stage rolling device that rolls large modules by moving the gear to be rolled by the width of the die in each of the forward and backward steps and sequentially increasing the rolling depth. do.

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 3, a rolled gear 8 is rotatably supported in the circumferential direction by a center 7 on the table of a rack-type rolling machine (not shown), and is movable in the axial direction. It is located in
A pair of die devices 3 and 4 are capable of reciprocating motion approximately parallel to the axial center surface of the rolled gear 8 from the left and right above and below the rolled gear 8 in a substantially point symmetrical manner with respect to the axial center of the rolled gear 8. They are mounted on mounting stands 1 and 2, respectively. Mounting bases 1 and 2 are for cylinders 5 and 6, respectively.
Accordingly, the mounting base 15 on which the center 7 is attached is hydraulically driven by the cylinder 16 and the switching valves 17 and 14, respectively, as shown in FIG. Good too. Each die device 3, 4 has a plurality of dies 3a, 3b, 3c, 3d, arranged in parallel, so that the same gear can be rolled in multiple steps.
It consists of 3e, 4a, 4b, 4c, 4d, and 4e.
As you can clearly see in Figure 3, multiple dice are
The tooth profiles of the dies 3a and 4a are the same as those of the dies 3b and 4b so that the gear 8 to be rolled is rolled little by little in multiple steps.
The dies 3e and 4e are smaller, and the tooth profile gradually becomes larger toward the final process dies 3e and 4e, and the teeth are closer to the final process, and the tooth profiles are different from each other. Furthermore, as shown in FIG.
They are arranged as a to 3e, 4e.

Each die device 3, 4 performs rolling processing only during forward movement, and one set 4 of the die device
The plurality of dice 4a, 4b, 4c, 4d, 4
A guide plate 9 having a guide tooth profile 19 substantially corresponding to and continuous with each tooth profile of e is fixed, and this guide tooth profile 19 is fixed before the die device 4 to which the guide plate 9 is fixed starts the rolling process. The rolled gear 8 and the rolled gear 8 are fitted in advance so as to be movable in the axial direction thereof.

Next, the operating situation will be explained. FIG. In other words, the rolled gear 8
This figure illustrates the movement of the right side dice device 3 relative to the figure. Similarly, FIG. 2B is a diagram illustrating the movement of the left die device 4 with respect to the gear 8 to be rolled.
Note that line diagram 10 shows the forward movement of the rolled gear, and 10
a, 10b, 10c, 10d, and 10e are the advances of the rolled gear by the respective die widths. 11 is the retreat of the rolled gear to its original position, 12 is the retreat of the die devices 3, 4, 3a, 3b, 3c, 3d,
3e, 4a, 4b, 4c, 4d, and 4e indicate the advance of each die for convenience. The gear to be rolled 8 is advanced 1 from the original position 19 toward the dies 3a and 4a.
0a, the dies 3a and 4a are moved forward in the direction of the arrow to perform rolling, and then the mounting base 1 of the gear 8 to be rolled is
5 is returned to the original position 19, and then the dice devices 3 and 4 are retreated. Next, the mounting base 15 is moved forward 10b toward the adjacent dies 3b, 4b for the gear 8 to be rolled, the dies 3b, 4b are moved forward in the direction of the arrow to perform rolling, and then the mounting base for the gear 8 to be rolled is moved forward. 15 is returned to its original position 19. Repeat the cycle of moving each die forward and back in the same way to complete rolling.
The rolled gear 8 and the die devices 3 and 4 are in the original position 1
When the process returns to step 9, one cycle of rolling the workpiece is completed. However, in this method, the die is passed through and the die is returned to the table by idle rolling.
When entering the next process, it is necessary to align the position of the gear to be rolled. Therefore, a guide plate 9 is required.

Next, referring to FIG. 4 showing another embodiment, each die device 3, 4 is configured to perform rolling processing in both forward and backward motions.
In addition, a plurality of dice 3a, 3b, 3c, 3d, 3e, 4a, 4 provided in each dice device 3, 4
b, 4c, 4d, and 4e, after the rolling process is completed by forward or backward movement, the gear to be rolled 8,
A loosely fitting portion is provided next to the tooth profile of each die, into which the rolled gear 8 can be loosely fitted so as to be movable in the axial direction. Once rolling begins, the gear 8 to be rolled does not come off the die until the rolling is completed, allowing reciprocating rolling, eliminating the need for the guide plate 9, and since the table stroke of the die is short, the cylinder 5a , 6a, the cylinder length can be shortened. Furthermore, since reciprocating rolling is used, power costs are saved and rolling processing time is shortened.

Next, the operating state will be explained. First, the gear 8 to be rolled is fixed in alignment with the dies 3a, 4a, and the mounting bases 1, 2 of the die devices 3, 4 are advanced toward the gear 8 to be rolled, and the first step is performed. After completing the close rolling process, without removing the gear 8 from the dies 3a, 4a, the gear 8 to be rolled is moved to the adjacent dies 3b, 4b using the loose fitting of each die. After fixing the forming gear 8, the mounting bases 1 and 2 of the die devices 3 and 4 are moved back to stop the dies 3b and 4b from coming off, thereby completing the second rolling process. Next, the gear 8 to be rolled is aligned and fixed to the dies 3c, 4c.
Then, the third rolling process begins. In this way, reciprocating rolling is performed in sequence, and the fifth rolling process of the dies 3c, 4c is completed. Next, the rolled gear 8 is cut into a die 3c,
4c, and attach the mounting bases 1 and 2 of the dice devices 3 and 4.
is returned to its original position 19 (12), and then the gear to be rolled is moved backward (11). This completes one cycle of operation.

As described above, the die device of the present invention is formed by a plurality of sets of dies having mutually different tooth profiles, and the gear to be rolled can be moved in the axial direction.
Rolling can be performed sequentially by moving the gear to be rolled by the width of the die during each reciprocation. Further, since the gear to be rolled is moved by the width of the die in each of the forward and backward steps and the rolling depth is increased sequentially, large modules can be rolled. In addition, the length of the die can be shortened, making the machine smaller and lower in price. Moreover, it has many effects such as being able to use less power.

[Brief explanation of the drawing]

Figure 1 is a plan view of an upper and lower die device centered around the gear to be rolled and the mounting base on which the die device is attached, and Figure 2 is a front view of Figure 1 and a diagram of the gear to be rolled and the table of the die. Operation diagram of A and B showing the movement,
FIG. 3 is an enlarged side sectional view of the apparatus shown in FIG. 1 during rolling of a workpiece, and FIG. 4 is a front view similar to FIG. 2 of another embodiment and a diagram of the gear to be rolled and the die device. Figure 5 is a hydraulic circuit diagram of the device. 3, 4...Dice device, 3a, 3b, 3c, 3
d, 3e, 4a, 4b, 4c, 4d, 4e...Dice, 7...Center, 8...Gear to be machined, 9...
Guide board, 9A...Guide gear.

Claims (1)

[Claims] 1. A pair of die devices that are substantially parallel to the axial center surface of a rolled gear rotatably supported in the circumferential direction, engage symmetrically with respect to the axial center, and reciprocate by hydraulic drive means. In the precision rolling machine, the die device is composed of a plurality of sets of dies arranged in parallel and having mutually different tooth profiles, and further includes a hydraulic drive for moving the gear to be rolled in the axial direction toward the die position for the next process. A multi-stage rolling device for a precision rolling machine, characterized in that it is equipped with means.