JPS6118002Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fitting device for fitting a gear into a jig and tool having a corresponding tooth profile.

For example, when powder molding various gears such as internal gears or external gears, after press forming into a predetermined shape in the molding process (hereinafter gears in this state are referred to as gear parts), they are sintered in a heat treatment furnace, Sizing processing is being carried out to make it to the regular dimensions. After sintering, when transporting gear parts to a sizing press for sizing, make sure that the tooth profile of the gear part and the corresponding tooth profile of the die of the sizing press fit together. To achieve this, it is necessary to match the tooth profile.
A conventional apparatus for performing tooth profile matching of gear parts in this manner is shown in FIGS. 1 and 2. A work guide 4 is attached by screws 3 to a feeder plate 2 that reciprocates on a feeder body 1 between a component loading position A and a sizing press position B. 1 and 2 show the case of molding an internal gear W as a gear part, a die 5 that performs a sizing press includes a core 7 on which external teeth 6 that fit with the internal gear W are formed, and an internal core 7. A lower punch 9 on which internal teeth 8 similar to the gear W are formed is assembled. With these core 7, lower punch 9, and die 5, which form the jig for the sizing press,
A cavity 10 is formed that accommodates the gear part W. Above the die 5, an upper punch 12 is installed which is movable up and down and has internal teeth 11 that fit into the core 7.

When the gear part W is conveyed to the die 5 by the feeder plate 2, the gear part W is in the cavity 10.
In order to fall inside and fit with the core 7,
As shown in FIGS. 1 and 2, above the intermediate position C between the parts input position A of the feeder body 1 and the sizing press position B, there is an external tooth 1 that fits into the gear part W.
3 is formed, and a positioning shaft 15 rotated by a motor 14 is attached so as to be vertically movable. When the gear part W is moved below the positioning shaft 15 by the feeder plate 2, a limit switch 16 is provided to detect this and stop the feeder plate 2. As a result, the motor 14 is actuated to rotate the positioning shaft 15 and lower the positioning shaft 15, so that the external teeth 13 of the positioning shaft 15 and the gear part W are fitted together. A lever 17 is provided protruding from the positioning shaft 15.
As the positioning shaft 15 rotates, the lever 17 comes into contact with the limit switch 18, and the rotation of the motor 14 is stopped, thereby positioning the gear part W.

Since positioning is done here, positioning axis 1
When the feeder plate 2 is advanced with the gear parts 5 retracted upward, the gear parts W fall into the cavity 10 and fit into the external teeth 6 of the core 7. The fall of the gear part W is confirmed by a limit switch 19 attached to the die 5, and the press is operated to perform sizing processing.

However, in such a conventional alignment device, the gear part W is placed at the sizing press position B.
Since the structure is such that the gear part W is rotated by the positioning shaft 15 before being transported to the sizing press position, a positional shift occurs while the gear part W is being transported to the sizing press position after the positioning is completed. I was afraid.

The present invention has been developed by focusing on the problems of the conventional technology, and aims to solve the above problems by rotating the gear parts on a jig for machining the gear parts. There is.

Next, an embodiment of the present invention shown in FIGS. 3 and 4 will be described. Similar to the cases shown in Figs. 1 and 2, this embodiment shows a case in which the present invention is applied to a sizing press for dimensional finishing when powder molding an internal gear, which is a gear part.
Components common to those in FIGS. 1 and 2 will be described using the same reference numerals.

A work guide 4 is attached by screws 3 to a feeder plate 2 that reciprocates on a feeder body 1 between a component input position A and a sizing press position B. A die 5 that serves as a sizing press is assembled with a core 7 formed with external teeth 6 for fitting the internal gear W, and a lower punch 9 formed with internal teeth 8 similar to the internal gear W. There is. A cavity 10 in which the gear part W is accommodated is formed by the core 7 and the lower punch 9, which serve as jigs and tools for the sizing press, and the die 5. Above the die 5, an upper punch 12 is installed which is movable up and down and has internal teeth 11 that fit into the core 7.

The die 5 has a gear part W placed on the core 7.
compressed air is injected to the teeth of the gear part W to the core 7.
A pressure reducing valve 22 and a solenoid valve 23 are assembled to a pipe 21 for sending compressed air from an air source to the nozzle 20, and the solenoid valve 23 is connected to a timer 24. It is operated by. The nozzle 20 is oriented in the tangential direction of the gear part W to inject compressed air toward the teeth.

To position the gear parts W fed into the feeder plate 2 at the parts feeding position A and install them on the die 5, the feeder plate 2 is advanced to the sizing press position shown by the imaginary line in FIG. This position is detected by the limit switch 25, and a signal to stop the advance of the feeder plate 2 is sent from the limit switch 25. In this position, in rare cases, the teeth of the gear part W and the external teeth 6 of the core 7
The trowel may fall into the cavity 10 of the die 5 due to alignment with the tooth grooves of the trowel, but such trowels are extremely rare, and usually the gear part W is placed on the upper end surface of the core 7. becomes. At this time, the solenoid valve 23 is opened and compressed air is jetted from the nozzle 20 toward the teeth of the gear part W. The gear part W at the sizing press position B is accommodated in the work guide 4, and the gear part W starts rotating. When the gear part W rotates to a position where the teeth of the gear part W and the tooth grooves of the core 7 match, the gear part W falls under its own weight. The limit switch 19 indicates that the gear part W has fallen into the cavity 10.
It detects this and issues a command to operate the press. The jetting of compressed air from the nozzle 20 is stopped by turning off the solenoid valve 23 using the timer 24. Note that any number of nozzles 20 may be provided.

FIG. 5 is a diagram showing another embodiment of the present invention,
While the previous embodiment was a case of molding an internal gear, this example shows a case of molding an external gear. A work guide 4 fixed to the feeder plate 2 with screws 3 has two built-in nozzles 20 for jetting compressed air toward the teeth of an external gear W to rotate the external gear. These nozzles 20 are connected to respective tubes 2 as in the previous embodiment.
1 is connected to an air source not shown.

According to the present invention, at the conveying end of a feeder that conveys gear parts on which internal teeth or external teeth or both are formed,
A jig with a shape corresponding to the shape of the gear parts is attached, and compressed air is injected toward the teeth of the gear parts transported onto this jig, while the gear parts are accommodated in the feeder. Since the rotating nozzle is attached to the feeder or the base that supports the jig and tool, alignment can be performed reliably at the required position, and there is no need to accurately transport gear parts to the jig and tool, making it easy to use. Positioning can be done using a mechanism.

[Brief explanation of the drawing]

Figure 1 is a plan view showing a conventional alignment device;
The figure is a sectional view taken along the - line in Fig. 1, Fig. 3 is a plan view showing an embodiment of the present invention, Fig. 4 is a sectional view taken along the - line in Fig. 3, and Fig. 5 A is a sectional view taken along the - line of the present invention. FIG. 5B is a plan view of the main part showing still another embodiment of FIG.
It is a sectional view along the - line of. 1...Feeder body, 2...Feeder plate, 4...Work guide, 5...Dice, 7...
Core, 9...lower punch, 10...hollow, 12...
Upper punch, 20...nozzle.

Claims (1)

[Scope of utility model registration request] A jig having a shape corresponding to the shape of the gear part is attached to a conveyance end of a feeder that conveys a gear part on which at least one of internal teeth or external teeth is formed, and the gear part is conveyed onto the jig and tool. A gear alignment device, wherein the jig is provided with a nozzle that blows compressed air onto the teeth of the gear component that has been moved and rotates the gear component.