JPH0862355A - Manufacture of gear, and manufacture of gear member using the gear - Google Patents

Abstract

PURPOSE: To provide a method for quickly and efficiently manufacturing a gear wheel by forming a clock gear in the state held on a hoop, and assembling the gear and a pinion on the hoop. CONSTITUTION: Punching-forming is performed by the punch 11 of a press mechanism to form a gear 10 on a hoop 1. The gear 10 is held within an island area 8 formed on the hoop 1. The hoop 1 is carried in again after reversed, and a pinion 20 is inserted to the center part of the bear 10 by the punch 14 and die 15 of the press mechanism. In the state where the pinion 20 is mounted, a gear wheel 30 consisting of the gear 10 and the pinion 20 is 'punching-parted' by the punch 16 of tlte press mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a gear and a method for manufacturing a gear member using the same, and more particularly to a manufacturing technique suitable for manufacturing a watch wheel including a timepiece gear and a pinion.

[0002]

2. Description of the Related Art Conventionally, in a method of forming a timepiece gear and attaching a pinion to this gear to manufacture a wheel & pinion, as shown in FIG. 6, the pinion is cut off, tooth splitting, and chemical treatment are carried out in three steps. In addition to forming the gear, blanking the gear, barrel polishing,
It was formed in 6 steps of tooth splitting, hardening treatment, center hole removal, and barrel polishing. The pinion and the gear thus formed are assembled by being pressed into each other by a press machine to form a wheel.

[0003]

In the above-mentioned conventional manufacturing method of the wheel & pinion, it is necessary to position and process the gears in each step after the blanking step in forming the gears, and the pinion and the gears are processed. Since it is necessary to set each component at a predetermined processing position also in assembling, there is a problem that it takes a lot of time and labor to position and convey the component when manufacturing a small wheel & pinion.

Therefore, the present invention is to solve the above-mentioned problems, and the problem is to hold each component on a continuous carrier in order to eliminate the necessity of positioning and carrying each component. It is to realize a method of manufacturing a gear and a gear member that can be processed or assembled.

[0005]

[Means for Solving the Problems] The means taken by the present invention to achieve the above object is a press comprising a punch portion formed in a gear shape and a die portion having a hole shape corresponding to the punch portion. With a die, the plate-shaped body is punched shallowly and then immediately returned, and the gear punched by the punch section is sent to the next step while being held in the punched section of the plate-shaped body.

In this case, at the time of punching the plate-shaped body by the press die, the punch section is not inserted into the die section, and the punch section is inserted from the opening surface of the die section to the thickness of the plate-shaped body. It is preferable to carry out by approaching to a distance equal to or less than this.

Further, after the gear is formed by the above-described gear manufacturing method, a step of attaching another component to the gear while the gear is held on the plate-shaped body, and the assembled gear and the other component are It is preferable to provide a step of integrally removing from the plate-shaped body.

Here, it is particularly desirable to carry out each of the steps while conveying the plate-shaped body in a predetermined direction.

[0009]

According to the first aspect of the present invention, the gear is held in the punching hole of the plate-shaped body by "pulling back" or "pulling-out" the plate-shaped body instead of "pulling out" by the press die. In this state, it is not necessary to handle individual gears in the subsequent manufacturing process, and the plate-shaped body can be flowed to the manufacturing line as it is.

According to the second aspect of the invention, since the gear is "pulled" to the plate-like member without inserting the punch portion into the opening surface of the die portion, "detachment" or "pullback" is performed. It is possible to reduce warp, sag, scraping, etc.
High quality gears can be formed.

According to a third aspect of the present invention, when manufacturing a gear member in which another component is attached to the gear, the step of attaching the other component and the step of removing the completed gear member while holding the gear on the plate-shaped body. Therefore, it can be manufactured quickly and easily.

According to the fourth aspect, the above-mentioned steps are sequentially performed while the plate-shaped body is conveyed in a predetermined direction, whereby the manufacturing can be performed quickly and efficiently.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method of manufacturing a gear and a gear member according to the present invention will be described with reference to the drawings. 1 (a) and (b)
1 shows the flow of the manufacturing method in this embodiment, and FIG.
(C) shows the planar shape of the hoop formed in the shape of a thin metal strip that flows through the manufacturing line. Conventionally, manganese nickel silver has been used as the material of the hoop 1, but
Age-hardenable copper alloy HM was adopted from age-hardenable copper alloy XHM, age-hardenable copper alloy HM, and phosphor bronze in consideration of characteristics of a sliding portion between a gear and a pin to be described later.

A pilot hole 2, a first buffer hole 3, a second buffer hole 4, a gear center hole 5 and a side hole 6 are previously formed in the hoop 1 by pressing. Due to these perforations, a ring-shaped island region 8 connected to the periphery by four curved support bridges 7 is formed in the center of the hoop 1.

The hoop 1 is intermittently moved from left to right in FIGS. 1A and 1B by engaging a driving and positioning sprocket with the pilot hole 2 by a transport mechanism (not shown). The press mechanism A, B, C arranged at a predetermined position is used for processing. The press mechanism A comprises a punch 11 and a die 12, and the punch 11 has a gear-shaped cross section.
2 has a receiving hole 12a corresponding to the shape of the punch 11. In the press mechanism A, the fracture line 9 is provided so that the gear 10 is formed in the island region 8 shown in FIG. 1 (c).

As shown in FIG. 2A, the break line 9 is formed on the upper and lower sides of the island region 8 of the hoop 1 by the punch 11 and the die 12.
2) and the punch 11 is brought closer to the opening surface of the receiving hole 12a of the die 12 by a distance smaller than the thickness of the hoop 1 as shown in FIG. 2 (b). At this time, the punch 11 is inserted into the receiving hole 12a of the die 12.
The gear 10 can be surely formed by inserting it into the inside, but even if the tip of the punch 11 does not reach the opening surface of the receiving hole 12a as shown in FIG. 9 can be formed. Here, the punch 11 of the press mechanism A returns to the upper side again after forming the breaking line 9, and the gear 10 is held in the island region 8 of the hoop 1 as shown in FIG. , Is separated from the surroundings).

In this case, as shown in FIG. 2B, holding the gear 10 in the island region 8 without inserting the punch 11 into the receiving hole 12a will be referred to as "extraction".
Called. On the contrary, the case where the punch 11 is shallowly inserted into the receiving hole 12a to completely separate the gear, and the punch 11 is immediately returned upward to hold the gear on the hoop 1 is referred to as "pulling back". In addition, the punch 11 is inserted deeply into the receiving hole 12a to completely complete the gear 1 as in the ordinary press working.
The case of punching out 1 is hereinafter referred to as "pulling out". Furthermore, the case where the gear once held in the hoop 1 is removed from the hoop 1 by performing the above-mentioned "detachment" or "removal" is referred to as "detachment".

In this embodiment, as shown in FIG.
As compared with the case where the "removal" is performed by performing the "extraction", the gear 10 is warped or scraped due to the gear 10 returning upward in the vicinity of the break line 9 and the scrap (surrounding island area 8) side. It is possible to reduce abrasion due to abrasion.

FIG. 3A shows a plane in the vicinity of the gear 10 formed by the "extraction". The support bridge portion 7 formed in the hoop 1 is largely curved toward the island region 8 formed in the central portion and then connected to the dispersed positions in the peripheral portion of the island region 8 to support the island region 8 with a weak force. are doing. Therefore, the periphery of the gear 10 is easily bent, and a substantially uniform force is exerted on the gear 10 over the entire circumference.
The deformation of the gear 10 can be prevented.

Two bridging portions 13 are formed inside the gear 10. The bridge portions 13 are formed substantially parallel to each other, and are provided with curved portions 13a that are curved in an arc shape and face each other near the center of the gear 10. The pair of curved portions 13a facing each other are formed along an arc of an ellipse having a minor axis in the facing direction. This is because by pushing the kana between the curved parts 13a, the bridge part 1
3 is pushed to the left and right, the arc of the curved portion 13a becomes closer to a true arc, and the contact length between the kana and the curved portion increases, so that the sliding portion is prevented from being scraped and the rotational torque stability is improved. This is because the fixing force in the axial direction can be sufficiently secured. Further, inside the both ends of the curved portion 13a, as shown in FIG. 3B, arcuate curved portions R, R having a small radius of curvature are formed. By forming the curved portion R, it is possible to prevent warp and burrs from being generated in the bridge-shaped portion 13 and the generation of cutting chips due to shaving when pushing the shaft of the kana, and sliding with the kana. The torque can be kept constant from the beginning of use, and the stability of the sliding torque can be enhanced.

The gear 10 formed by "extraction" as described above and the pinion 20 shown in FIG. 4 are fitted by the press mechanism B shown in FIG. At this time, the direction of the “extraction” of the press mechanism A (the moving direction of the punch 11) is the downward direction, and the direction of the “extraction” of the press mechanism C described later is the upward direction. The front and back of hoop 1 are reversed with mechanism B. The punch 14 holds the pinion 20 and pushes it into the gear 10 in the hoop 1 supported on the die 15. In this case, since the mounting work is performed on the hoop 1, it is possible to reduce the labor required for positioning and the like. After being assembled on the hoop 1 by the press mechanism B, it is sent to the press mechanism C as shown in FIG. 1 (b), and the cylindrical punch 16 causes the wheel & pinion 30 including the gear 10 and the pinion 20 to move upward. "Unplugged".

As described above, in this embodiment, the watch wheel (2nd wheel, 4th wheel, etc.) can be manufactured by the process shown in FIG. Here, the manufacturing process of the kana is almost the same as the conventional one, but the manufacturing process of the gear is only the "extraction" process, which is greatly simplified. And, because the pinion is attached to the gear held on the hoop, the work of supplying, positioning, and sending out the individual parts becomes unnecessary, and finally the state of the finished wheel and wheel is completed. For the first time, "unplug"
As a result, it is extremely easy to manage and handle the parts as a whole. Therefore, the operating rate is improved from 70% to 80% compared to the conventional manufacturing process shown in FIG.
The cycle time was greatly reduced from 2.5 seconds to 0.9 seconds, enabling rapid and efficient manufacturing.

[0023]

As described above, the present invention has the following effects.

According to the first aspect of the present invention, the gear is held in the punching hole of the plate-shaped body by "pulling back" or "pulling-out" the plate-shaped body instead of "pulling out" by the press die. In this state, it is not necessary to handle individual gears in the subsequent manufacturing process, and the plate-shaped body can be flowed to the manufacturing line as it is.

According to the second aspect of the invention, since the gear is "pulled" to the plate-like member without inserting the punch part inside the opening surface of the die part, the "pull-out" or "pull-out" is performed. It is possible to reduce warp, sag, scraping, etc.
High quality gears can be formed.

According to a third aspect of the present invention, when manufacturing a gear member in which another component is attached to the gear, the step of attaching the other component and the step of removing the completed gear member while holding the gear on the plate member. Therefore, it can be manufactured quickly and easily.

According to the fourth aspect, the above-mentioned steps are sequentially carried out while the plate-shaped body is conveyed in the predetermined direction, whereby the production can be carried out quickly and efficiently.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view (a) and (b) showing a production line of a train wheel in an embodiment according to the present invention, and a partial plan view (c) showing a plane shape of a hoop flowing in the production line.
Is.

FIG. 2 is enlarged explanatory diagrams (a), (b) and (c) for explaining the action of the “extraction” step in the same example.

FIG. 3 is an enlarged plan view (a) showing the vicinity of the gear that has been “extracted” in the same embodiment, and an enlarged plan view further enlarging a part of the bridge-like portion formed in the center of the gear ( b)
Is.

FIG. 4 is a vertical cross-sectional view showing a state in which a pin is attached to a gear.

FIG. 5 is a process drawing showing the manufacturing process of the train wheel in the embodiment.

FIG. 6 is a process diagram showing a manufacturing process of a conventional watch wheel.

[Explanation of symbols]

 1 Hoop 8 Island area 9 Break line 10 Gear 20 Kana 30 Wheel 11, 14, 16 Punch 12, 15, 17 Die

Claims (4)

[Claims] 1. A press die comprising a punch portion formed in the shape of a gear and a die portion having a hole shape corresponding to the punch portion, punches the plate-like body shallowly, and then immediately returns the punched body to the punch portion. A method of manufacturing a gear, wherein the punched gear is sent to the next step while being held in the punched portion of the plate-shaped body. 2. The punch according to claim 1, wherein the punch section is not inserted into the die section at the time of punching the plate body by the press die, and the punch section is inserted from the opening surface of the die section into the plate shape. A method for manufacturing a gear, wherein the method is performed by approaching to a distance equal to or less than a body thickness. 3. After the formation of the gear according to claim 1 or 2, a step of attaching another component to the gear while the gear is held on the plate-like body, the assembled gear and And a step of integrally removing the other component from the plate-shaped body. 4. The method for manufacturing a gear member according to claim 3, wherein each of the steps is performed while the plate-shaped body is being conveyed in a predetermined direction.