JP6785484B1 - Helical gear plate manufacturing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a helical gear plate manufacturing apparatus capable of improving stability and processing accuracy. SOLUTION: A die 10 is cylindrical and has a spiral internal tooth 11 on an inner peripheral surface, and a punch (laminated body) 20 pressurizes a plate-shaped material with a required processing load and is rotatable about an axis. The punch (laminated body) 20 is formed of a laminated body in which a plurality of helical gears 21 are stacked and joined, and the outer teeth 22 on the outer peripheral surface of the punch 20 are provided with a cylindrical outer tooth 22 having a spiral shape on the outer peripheral surface. A punch guide (laminated body) 30 having spiral internal teeth 32 to be screwed is provided, and the punch guide (laminated body) 30 is a laminated body in which a plurality of guide plates 31 corresponding to the helical gear 21 are laminated and joined. It consists of a body. [Selection diagram] Fig. 1

Description

The present invention relates to a helical gear plate manufacturing apparatus capable of improving stability and processing accuracy.

Generally, when producing a helical gear, a method is known in which a gear material is rotated and cut with a hobbing machine to form teeth and then polished. However, when cutting with a hobbing machine, it takes a lot of processing time and labor, so that there are problems that productivity is low, mass production cannot be performed, and manufacturing cost is high.

Therefore, in order to deal with the above problems, a device for forming a helical gear by punching with a press has been proposed as shown below.

Japanese Patent Application Laid-Open No. 6-304694 (Patent Document 1) states that a female die is spirally moved to produce a gear gear by press processing, and the processing time is significantly shortened. When the helical spline of the die holder slides in the helical groove of the slide guide during vertical movement, the female die spirally moves to process the gear material into a gear, "Continuous production method of gears, etc." Has been proposed.

Further, in Japanese Patent Application Laid-Open No. 2010-23092 (Patent Document 2), a base piece for mounting a gear material on a lower mold for the purpose of easily and surely forming oblique teeth on a gear material by punching. The upper mold has a punch holder for holding a circular punched punch having a spiral punched tooth on the inner circumference and a guide piece having a spiral guide tooth on the outer circumference that meshes with the punched tooth. A guide plate is provided so as to be relatively freely displaceable with a separation spring interposed between them, and when the upper die is lowered by the press device when forming the oblique tooth gear, the guide plate is placed between the guide piece and the base piece as a gear material. After stopping the descent at the fixed position, the punch holder lowers while compressing the release spring, so that the punching punch is guided by the guide teeth of the guide piece and descends while rotating, and the punched teeth on the inner circumference. Has proposed a "oblique tooth gear forming device" that punches oblique teeth on the outer circumference of a gear material.

Further, in Japanese Patent Application Laid-Open No. 2012-670 (Patent Document 3), for the purpose of realizing parts supply at low cost with short processing time, the peripheral surface on which the helical gear of the material is formed is made to face. The counter portion has a helical punch portion to be fixed, a counter portion for fixing the gear plate material by sandwiching it between the helical punch portion when forming teeth on the gear plate material, and an oblique tooth forming portion on the inner peripheral surface side. A die portion that rotates along the side surface and moves in the mold closing direction to press the slanted tooth forming portion against the peripheral surface of the gear plate material sandwiched between the counter portion and the helical punch portion to form the helical gear. "Helical gear plate, etc." to have has been proposed.

Further, Japanese Patent Application Laid-Open No. 2011-235321 (Patent Document 4) aims to provide a continuous press forming method for processing an oblique gear from a gear material with high accuracy and high productivity, and an apparatus therefor. A press mold consisting of a rotatable punch and a die having a material receiving portion that receives the gear material at a position corresponding to the punch and having an oblique tooth forming portion that communicates with the lower part of the material receiving portion is prepared. When the punch rotates when the punch operates under pressure, the gear material rotates spirally along the oblique tooth forming portion to form oblique teeth on the outer peripheral surface, and passes through the opposite side of the punch. A "continuous press forming method for oblique gears, etc." for extracting gear materials has been proposed.

Further, Japanese Patent Application Laid-Open No. 2009-716 (Patent Document 5) describes the torsion angle of the oblique tooth gear on the inner peripheral surface of the die holder for the purpose of improving processing accuracy and production efficiency and expecting reduction of manufacturing cost. A die hole having an internal tooth having a twist angle corresponding to, a spiral external tooth screwed to the internal tooth of the die holder on the outer periphery, and an internal tooth having a twist angle corresponding to the twist angle of the oblique tooth gear. A punch fitting hole having an internal tooth having a torsion angle corresponding to the torsion angle of the oblique tooth gear, a material retainer having an external tooth screwed to the internal tooth of the die holder, and a punch fitting hole. A "punching device for oblique tooth gears" having a punch having external teeth that fit into the internal teeth has been proposed.

Japanese Unexamined Patent Publication No. 6-304694 JP-A-2010-23092 Japanese Unexamined Patent Publication No. 2012-670 Japanese Unexamined Patent Publication No. 2011-235321 Japanese Unexamined Patent Publication No. 2009-716

As a conventional punch (integrated type) manufacturing method, machining processing, electric discharge machining, and wire cutting machining are known. On the other hand, when it comes to the method of manufacturing a punch guide, it is not possible to process unevenness on the side surface of the hole by machining. Further, in the case of electric discharge machining, since machining is performed with electrodes, the machining accuracy is poor and the punch cannot perform spiral motion with high precision. Further, in the case of wire cutting, the upper surface and the lower surface of the processing material can be processed according to the shape, but there is a problem that the shape of the central portion cannot serve as a guide if the whole is lengthened because cracks occur as shown in FIG. .. Since the punch is rotated and punched, the punch needs to be guided firmly, but if the guiding distance is shortened, there is a problem that stability is lost and processing accuracy is deteriorated.

Therefore, in order to solve the above-mentioned problems, the present invention provides a helical gear plate manufacturing apparatus capable of improving stability and machining accuracy when punching an oblique gear by press working. The purpose.

In order to solve the above problems, the invention according to claim 1 includes a lower mold and an upper mold that is relatively movable in the axial direction that is brought into contact with and separated from the lower mold, and is made of a plate-like material by a die and a punch. In a helical gear plate manufacturing apparatus for punching and forming an oblique gear having a plurality of teeth having a torsion angle, the die is cylindrical and has a torsion angle corresponding to the torsion angle of the oblique gear on the inner peripheral surface. The punch is provided with spiral internal teeth, and the punch pressurizes the plate-shaped material with a required machining load and is rotatable about the axis, and is cylindrical and has a twist on the outer peripheral surface corresponding to the twist angle of the oblique gear. The oblique teeth are provided with spiral external teeth having corners, and the punch is composed of a laminated body in which a plurality of helical gears are stacked and integrally joined, and is screwed onto the external teeth on the outer peripheral surface of the punch. A punch guide having spiral internal teeth having a twist angle corresponding to the twist angle of the gear is provided, and the punch guide is a laminated structure in which a plurality of guide plates corresponding to the helical gear are laminated and integrally joined. The punch is stably guided by the punch guide having a wide ground contact surface as the upper die moves in the axial direction, and slides spirally while rotating, from the plate-shaped material to the oblique teeth. It is characterized by punching out gears.

Further, in the invention according to claim 2, the helical gear located at the lower end of the integrally joined laminate of the punch according to claim 1 is replaceably joined from the main body of the laminate. It is characterized by that.

In addition, the invention according to claim 3 provides a positioning pilot for positioning the plate-shaped material placed on the die when the upper die according to claim 1 or 2 is moved in the axial direction. It is characterized by being prepared.

The invention according to claim 4 is characterized by comprising an elastic urging means for pulling up the upper die after punching the oblique tooth gear from the plate-shaped material according to claims 1 to 3. ..

As described above, according to the helical gear plate manufacturing apparatus according to the present invention, since the punch and the punch guide are composed of a laminated body, the guiding distance becomes long and the punch is stably guided by the punch guide to spiral. It is possible to punch out the oblique gear by sliding in a shape. Further, since the helical gear located at the lower end of the laminated body of the punch is replaceably joined from the main body of the laminated body, maintenance is facilitated.

It is a front explanatory view which shows the top dead center position state of the manufacturing apparatus of the helical gear plate which concerns on this invention. It is a front explanatory view which shows the bottom dead center position state of FIG. It is a plane explanatory view of FIG. It is (a) plan view and (b) front view which shows an example of a helical gear. It is a perspective view of FIG. It is (a) plan view and (b) front view which shows an example of a punch (laminate body). It is a perspective view of FIG. It is (a) plan view and (b) front view which shows an example of a guide plate. It is a perspective view of FIG. It is (a) plan view and (b) front view which shows an example of a punch guide (laminate body). It is a perspective view of FIG. It is (a) plan view and (b) front view which shows an example of the oblique tooth gear. It is a perspective view which shows the reference shape by the conventional manufacturing method.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that each configuration of the helical gear plate manufacturing apparatus of the present invention is not limited to the following examples, and may be appropriately changed depending on the implementation status.

As shown in FIGS. 1 to 3, the helical gear plate manufacturing apparatus 1 is a diagonal gear W having a plurality of teeth having a twist angle from a plate-like material (see FIG. 12, twist angle: 15 to 30 degrees). ) Is a press molding apparatus for punching and molding, and includes a lower mold 2 and an upper mold 3 that is movable in the vertical direction and is brought into contact with and separated from the lower mold 2. Further, when the upper die 3 moves toward the die 10 provided on the lower die 2, the punch guide (laminated body) 30 for guiding the movement of the punch (laminated body) 20 provided on the upper die 3 Is attached to the lower mold 2. Further, as shown in FIG. 1, the punch (laminated body) 20 is always in contact with the punch guide (laminated body) 30 even when the upper die 3 is at the top dead center position. Further, as shown in FIG. 3, a lock guide 33 is provided on the outer peripheral portion of the punch guide (laminated body) 30.

As shown in FIGS. 1 and 2, a positioning pilot 40 is provided to position the plate-shaped material (not shown) placed on the die 10 when the upper die 3 is moved in the axial direction. The positioning pilot 40 is on a rotating shaft, and the shaft position and the tooth shape are coaxial. The positioning pilot 40 may be omitted. Further, as shown in FIG. 2, a spring 50 is provided as an elastic urging means for pulling up the upper die 3 in order to collect scrap generated around the Fuchi after punching the oblique tooth gear W at the bottom dead center position.

The die 10 includes a spiral internal tooth 11 which is cylindrical and has a torsion angle corresponding to a torsion angle (15 degrees to 30 degrees) of the oblique gear W to be punched and formed on the inner peripheral surface.

The punch (laminated body) 20 pressurizes a plate-shaped material (not shown) placed on the die 10 with a required processing load, is attached to the upper die 3 via a bearing 4, and can rotate around the axis. Is. Further, the punch (laminated body) 20 includes a spiral outer tooth 22 which is cylindrical and has a twist angle corresponding to a twist angle (15 degrees to 30 degrees) of the oblique tooth gear W to be punched and molded on the outer peripheral surface. ing. The outer teeth 22 at the lower end of the punch (laminated body) 20 are screwed into the inner teeth 11 of the die 10 by the rotation of the punch (laminated body) 20 to enter the inside.

Here, the punch (laminated body) 20 has a structure of a laminated body in which a plurality of helical gears 21 are stacked and joined. 4 and 5 are a plan view, a front view, and a perspective view showing an example of the helical gear. 6 and 7 are a plan view, a front view, and a perspective view showing an example of a punch (laminated body).
As shown in FIGS. 4 and 5, the helical gear 21 is cylindrical and has a spiral shape having a twist angle corresponding to a twist angle (15 degrees to 30 degrees) of the oblique tooth gear W to be punched and formed on the outer peripheral surface. It has external teeth 22. The thickness (T1) of the helical gear 21 is set to, for example, twice the thickness of the oblique tooth gear W. Specifically, assuming that the thickness of the oblique gear W is 3.2 mm, the thickness (T1) of the helical gear 21 is set to 6.4 mm. As shown in FIGS. 6 and 7, for example, 10 helical gears 21 are stacked and joined to the punch (laminated body) 20. Specifically, the length (L1) of the punch (laminated body) 20 is 64.0 mm. The thickness and the number of overlapping helical gears 21 are not limited to this embodiment, and can be appropriately changed depending on the material of the oblique gear W to be punched and formed.

The punch (laminated body) 20 is manufactured one by one with a wire cutting machine into a different shape in the upper and lower parts, and the helical gear 21 is connected and joined by a mounting hole and a positioning pin. Further, the helical gear 21a located at the lower end of the punch (laminated body) 20 has a punching clearance and is replaceably joined from the main body of the laminated body. As a result, maintenance is facilitated with only the lower one. The shape of the laminated body may be a radial shape from the rotation axis.

Further, a spiral internal tooth having a twist angle corresponding to a twist angle (15 degrees to 30 degrees) of the oblique gear W to be punched and formed to be screwed into the outer teeth 22 on the outer peripheral surface of the punch (laminated body) 20. A punch guide (laminated body) 30 provided with 32 is provided. The punch guide (laminated body) 30 has a structure of a laminated body in which a plurality of guide plates 31 corresponding to the helical gear 21 are stacked and joined. 8 and 9 are a plan view, a front view, and a perspective view showing an example of the guide plate. 10 and 11 are a plan view, a front view, and a perspective view showing an example of a punch guide (laminated body).
As shown in FIGS. 8 and 9, the thickness (T2) of the guide plate 31 corresponds to the thickness (T1) of the helical gear 21. Assuming that the thickness (T1) of the helical gear 21 is 6.4 mm, the thickness (T2) of the guide plate 31 is 6.4 mm. As shown in FIGS. 10 and 11, for example, eight guide plates 31 are stacked and joined to the punch guide (laminated body) 30. Specifically, the length (L2) of the punch guide (laminated body) 30 is 51.2 mm. The thickness and the number of overlapping guide plates 31 are not limited to this embodiment, and can be appropriately changed depending on the material of the oblique gear W to be punched and formed.

When the oblique gear W is manufactured by the helical gear plate manufacturing apparatus 1 configured as described above, the upper die 3 is moved in the axial direction (from the top dead center position shown in FIG. 1 to the bottom dead center position shown in FIG. 2). The punch (laminated body) 20 is stably guided by the punch guide (laminated body) 30 having a wide ground contact surface and slides in a spiral while rotating, so that the punch (laminated body) 20 slides in a spiral shape with high accuracy (guide). The oblique gear W can be punched out from the plate-shaped material by increasing the distance.

1 Helical gear plate manufacturing equipment 2 Lower die 3 Upper die 4 Bearing 10 Die 11 Internal tooth 20 Punch (laminate)
21 Helical gear 21a Helical gear 22 External teeth 30 Punch guide (laminated body)
31 Guide plate 32 Internal teeth 33 Lock guide 40 Positioning pilot 50 Spring W Oblique tooth gear

Claims (4)

Helical that is equipped with a lower die and an upper die that can move relative to the axial direction toward and away from the lower die, and punches and molds an oblique gear with a plurality of teeth having a twist angle from a plate-like material by a die and a punch. In the gear plate manufacturing equipment
The die is cylindrical and has a spiral internal tooth on the inner peripheral surface having a twist angle corresponding to the twist angle of the oblique gear.
The punch pressurizes the plate-shaped material with a required machining load and is rotatable about the center of the shaft, and has a cylindrical outer tooth having a twist angle corresponding to the twist angle of the oblique gear on the outer peripheral surface. The punch is composed of a laminated body in which a plurality of helical gears are stacked and integrally joined.
A punch guide having a spiral internal tooth having a twist angle corresponding to a twist angle of the oblique gear that is screwed into the outer tooth on the outer peripheral surface of the punch is provided, and the punch guide is attached to the helical gear. It consists of a laminated body in which a plurality of corresponding guide plates are stacked and integrally joined.
Along with the axial movement of the upper die, the punch is stably guided by the punch guide having a wide ground contact surface and slides spirally while rotating to punch out the oblique gear from the plate-shaped material. A helical gear plate manufacturing device characterized by. The device for manufacturing a helical gear plate according to claim 1, wherein the helical gear located at the lower end of the integrally joined laminate of the punches is exchangeably joined from the main body of the laminate. .. The production of the helical gear plate according to claim 1 or 2, wherein a positioning pilot for positioning the plate-shaped material placed on the die when the upper die is moved in the axial direction is provided. apparatus. The device for manufacturing a helical gear plate according to any one of claims 1 to 3, further comprising an elastic urging means for pulling up the upper die after punching the oblique gear from the plate-shaped material. ..