JP2003170242A - Forging press with automatic feeder and molding method in the forging press with automatic feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forging press with an automatic feeder and a molding method in the forging press capable of improving a degree of surface accuracy of a forged product by automating a removing work of scales formed on the surface of a forging stock material and by positively removing scales formed on the surface of the forging stock material, while automatically feeding the forging stock material in a multi-process press. <P>SOLUTION: The forging press is provided with a plurality of dies M to perform a plurality of molding processes, and an automatic cross-feed device 10 to crossly feed a cylindrical forging stock material B to a plurality of dies M. When the automatic cross-feed device 10 transfers the forging stock material B from a first die MA to a second die MB, a reversal mechanism B to rotate the forging stock material B 90° around the shaft is provided. The lower surface of the upper die MA1 in the first die MA and the upper surface of the lower die MA2 are formed in curvature shapes and, when the forging stock material B is shaped by the first die MA, the forging stock material B turns into a curvature bar B1 which is vertically curved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forging press with an automatic feeding device and a molding method in the automatic feeding forging press. In a forging press, a forging material heated by an induction heater is sandwiched by a pair of dies, and the forging material is formed into a shape of a die hole formed in the pair of dies. However, while the forging material is sent from the induction heater to the forging press, the surface of the forging material reacts with oxygen in the air to form a scale on the surface of the forging material.
If the forging material is pressed while the scale remains attached, the surface accuracy of the forged forged product deteriorates. Therefore, before pressing the forging material, it is necessary to remove the scale formed on the surface of the forging material. TECHNICAL FIELD The present invention relates to a forging press with an automatic feeding device capable of removing a scale formed on the surface of a forging material and a molding method in the automatic feeding forging press.

[0002]

2. Description of the Related Art Conventionally, a forging press provided with an automatic feeder has a plurality of dies, and a plurality of steps are simultaneously performed by the plurality of dies. Then, the movement of the forging material between each die is performed by a pair of feed bars provided on the side of the die, and by a pair of fingers provided on the pair of feed bars,
The forging material is conveyed to the next step in a state of being sandwiched and supported from both ends in the axial direction. Forging presses equipped with such an automatic feeder are usually subjected to a crushing process for the purpose of scale removal and volume distribution in the first die,
In this crushing step, the scale on the surface of the forging material B is removed.

However, as shown in FIGS. 7 (A) and 7 (B), if the forging material B is pressed from above and below by the first molds 102 and 103, the forging material B is formed laterally. Although the scale S can be removed, the scale S formed above and below the forging material B is the forging material B and the first die.
Since it is sandwiched between 102 and 103, there is a problem that it remains on the surface of the forged material B and the surface accuracy of the molded forged product is reduced. Further, if the forging material B pressed by the first molds 102 and 103 is inverted 90 degrees and then supplied to the second molds 104 and 105, and the second molds 104 and 105 are crushed, It is also possible to remove the scale S that could not be removed by the first molds 102 and 103. However, Fig. 7 (A) and Fig. 7 (B)
As shown in, the forging material B is generally a rod material having a circular cross-section, and when pressed by the first molds 102 and 103, it becomes an elliptical rod material having a horizontally long cross-section. Therefore, the first mold 102
When the forging material B pressed with 103 is turned 90 degrees, it becomes a vertically long elliptical bar (see Fig. 7 (C)).
), It is very unstable when placed on the second mold 104, 105, and it rolls on the lower mold 105. Therefore, it is difficult to perform the crushing work in the second molds 104 and 105, and it has been impossible to remove the scale S with the second molds 104 and 105. Therefore, in order to improve the surface accuracy of the molded forged product, the scale S formed on the surface of the forging material B must be manually removed in advance and then supplied to the forging press. Could not be automated.

In view of such circumstances, the present invention can automatically remove the scale formed on the surface of the forging material. In a multi-step press, the forging material is automatically fed while
An object of the present invention is to provide a forging press with an automatic feeding device and a molding method in the automatic feeding forging press, which can surely remove the scale formed on the surface and improve the surface accuracy of a forged product.

[0005]

A forging press with an automatic feeding device according to claim 1 is provided with a plurality of dies for performing a plurality of molding steps, and for laterally feeding a rod-shaped forging material to the plurality of dies. A forging press equipped with the automatic feeding device of claim 1, wherein when the automatic feeding device moves the forging material from the first die to the second die, the forging material is rotated by 90 ° around its axis. It is provided with a reversing mechanism, the lower surface of the upper mold and the upper surface of the lower mold in the first mold are formed in a curved shape, and when the forging material is molded by the first mold,
It is characterized in that the forged material is a curved rod which is curved vertically. A forging press with an automatic feeding device according to a second aspect is the forging press with an automatic feeding device according to the first aspect, wherein the automatic feeding device is provided with a pair of fingers that sandwich and support both axial ends of the forging material. The die is characterized in that end forming grooves for forming axially opposite ends of the forged material in parallel and coaxial columnar shapes are formed. The forging press with an automatic feeder according to claim 3 is provided with a plurality of dies for performing a plurality of molding steps, and an automatic feeder for laterally feeding a rod-shaped forging material to the plurality of dies. The automatic feeding device includes a reversing mechanism that rotates the forging material by 90 ° around its axis when moving the forging material from the first die to the second die. The lower surface of the upper die and the upper surface of the lower die in the first die are formed as flat surfaces parallel to each other, and a support groove parallel to the axial direction of the forging material is formed on the upper surface of the lower die of the second die. Is formed, and the width of the support groove of the support protrusion is slightly wider than the vertical thickness of the forging material formed by the first mold. A molding method in a forging press with an automatic feeder according to claim 4 is a forging provided with a plurality of dies for performing a plurality of molding steps and an automatic feeder for laterally feeding a rod-shaped forging material to the plurality of dies. In the press, in the first die, the forging material is formed into a curved rod that is curved up and down, and the forging material is rotated by 90 ° around its axis by the automatic feeder, and is then placed on the second die. The feature is to put. A molding method in a forging press with an automatic feeder according to claim 5, wherein a plurality of dies for automatically feeding a plurality of molding steps, and an automatic feeder for laterally feeding a rod-shaped forging material to the plurality of dies. In the forging press provided with, the lower surface of the upper die and the upper surface of the lower die in the first die are formed into flat surfaces parallel to each other, and on the upper surface of the lower die of the second die, Support projections having support grooves parallel to the axial direction of the forging material are formed, and in the first die, the forging material is formed into flat surfaces whose upper and lower ends are parallel to each other, and by the automatic feeder, The forging material is inserted into the supporting groove of the supporting protrusion of the second mold while rotating the forging material by 90 ° about its axis.

According to the first aspect of the present invention, when the forging material is formed by the first die, the forging material becomes a bending shaft whose axis is vertically curved. Therefore, when the forging material is rotated 90 ° around its axis by the reversing device and then placed on the lower die of the second mold, the forging material has a wide width in the horizontal direction. Can be stably placed on the second mold. Therefore, by the second mold,
The forging material can be surely pressed from the direction rotated by 90 ° with respect to the direction in which the first mold is pressed. Therefore, even if a scale is formed around the forged material, the scale on the entire circumference can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved. According to the invention of claim 2, in the automatic feeding device,
If the pair of fingers are provided horizontally and opposite to each other, the both ends of the forging material in the axial direction can be reliably sandwiched and supported. Therefore, the pair of fingers and the forging material can be easily fitted together, and the structure of the device can be simplified. According to the invention of claim 3, if the forging material is inserted into the support groove of the support protrusion, the forging material can be supported by the support groove. Moreover, since the width of the support groove is only slightly wider than the flat surfaces of the forging material that are parallel to each other, it is possible to prevent the forging material from rotating around its axis. Therefore, the forging material can be prevented from rolling on the lower die of the second die, and the forging material can be surely pressed from the direction rotated by 90 ° with respect to the pressing direction of the first die. it can. Therefore, even if a scale is formed around the forged material, the scale on the entire circumference can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved. According to the invention of claim 4, when the forging material is formed by the first die, the forging material becomes a curved shaft whose axis is vertically curved. Therefore, when the forging material is rotated 90 ° around its axis by the reversing device and then placed on the lower die of the second mold, the forging material has a wide width in the horizontal direction. Can be stably placed on the second mold. For this reason, the second die is pressed against the forging material in the direction in which the first die presses it.
It is possible to reliably apply pressure from the direction rotated by 0 °. Therefore, even if a scale is formed around the forged material,
The scale of the entire circumference can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved. According to the invention of claim 5, if the forging material is inserted into the support groove of the support protrusion, the forging material can be supported by the support groove. Therefore, the forging material can be prevented from rolling on the lower die of the second die, and the forging material can be surely pressed from the direction rotated by 90 ° with respect to the pressing direction of the first die. it can. Therefore, even if a scale is formed around the forged material, the scale on the entire circumference can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a schematic explanatory view of the forging press 1 with an automatic feeder according to this embodiment. FIG. 4 is an explanatory view of the work of reversing the forging material B by the reversing mechanism 13 of the automatic feeding device 10. As shown in FIGS. 3 and 4, the forging press 1 with an automatic feeder according to the present embodiment includes a plurality of molds M for performing a plurality of molding processes, and a bar-shaped forging material B for the plurality of molds M. The automatic feeding device 10 for lateral feeding is provided, and it is characterized in that all the scales S formed on the surface of the forging material B can be removed by the first die MA and the second die MB. is there. Therefore, before describing the first mold MA and the second mold MB, which are the features of the present invention, the outline of the forging press 1 with an automatic feeder of the present embodiment will be described.

First, a plurality of molds M will be described. In FIG. 3, reference numeral B indicates a columnar forging material. Also,
Reference numerals 4 and 5 indicate an upper die holder and a lower die holder, respectively. Between the upper die holder 4 and the lower die holder 5, there are provided a plurality of dies MA to ME for pressurizing the forging material B in the radial direction to form a rocker arm, connecting rod, cap or the like. ing. The upper die of each die MA-ME is the upper die holder 4
The lower die is attached to the lower end of the
It is attached to the upper end of.

Each of the molds MA to ME is for performing the following steps. The first die MA is a forging material B
Is for bending and crushing, and for removing the scale S formed on the surface of the forging material B. Second mold M
B is for crushing the forging material B and for removing the scale S that could not be removed by the first die MA.
The third die MC is for performing a roughing step. The fourth mold MD is for performing a finishing process. The fifth mold ME is for performing a deburring step.

Therefore, the forging material B is placed in each of the dies MA to ME so that their axes are horizontal,
By lowering the upper die holder 4, a plurality of dies MA to M
Since the forging material B can be sandwiched and pressed between the upper die and the lower die of E, the forging material B can be molded into a rocker arm or the like.

Next, the automatic feeding device 10 will be described. As shown in FIGS. 3 and 4, a pair of left and right feed bars 12, 12 are provided on both sides of the plurality of molds MA to ME. The pair of left and right feed bars 12, 12 are
It is provided so as to be movable up and down, left and right, and front and back (perpendicular to the paper surface in FIG. 3B). The pair of left and right feed bars 12, 12 has a plurality of pairs of left and right fingers 11 ,.
11 are attached so as to face each other. The plurality of pairs of left and right fingers 11, 11 are provided to sandwich and support both ends of the forging material B attached to the plurality of molds MA to ME. Therefore, while the pair of left and right fingers 11, 11 support both ends of the forging material B, the pair of left and right feed bars 12, 12 are moved upward and then moved forward to be lowered, so that the pair of left and right fingers 1
After releasing the forging material B by 1, 11, the pair of left and right feed bars 12, 12 can be returned to their original positions, so that the forging material B can be sequentially fed to the next step.

When the forging material B is moved from the first die to the second die on both sides of the first die MA and the second die MB, the forging material B is moved around its axis. It is provided with a pair of right and left reversing mechanisms 13, 13 that rotate 90 °. Since the pair of left and right reversing mechanisms 13, 13 have the same structure,
Only the reversing mechanism 13 provided on the right side of the first mold MA and the second mold MB will be described below. As shown in FIGS. 3 and 4, the reversing mechanism 13 is provided in the feed bar 1
Inverting shaft rotatably mounted by two bearings 12h
It has a 13c. The finger 11 is attached to the inner end of the inversion shaft 13c. Also, this inversion axis
One end of the reversing arm 12b is fixed to the outer end of 13c. The other end of the reversing arm 12b is attached to a groove 13g formed in the support member 13a so as to be rotatable and vertically slidable. Therefore, when the feed bar 12 moves forward (moves to the right in FIG. 4), the reversing arm 12b is moved.
However, it rotates with the other end as a fulcrum. Then, since the reversing shaft 13c attached to one end of the reversing arm 12b and the finger 11 are rotated by 90 degrees, the forging material B supported by the finger 11 is also rotated by 90 degrees around the axis. That is, if the forging material B is moved from the first die to the second die by the feed bar 12, the forging material B is rotated by 90 degrees around its axis by the reversing mechanism 13 and the second die MB of the second die MB is rotated. It is placed on the lower mold MB2.

With the above-mentioned structure, the forging press 1 with an automatic feeder according to this embodiment operates as follows. First, the forging material B is laterally fed by the automatic feeder 10 and the forging material B is supplied to each of the molds MA to ME. At this time, the forging material B forged by the first die MA is rotated 90 ° around its axis by the pair of left and right reversing mechanisms 13, 13 and then the lower die MB of the second die MB.
Can be placed on 2. Then, when the upper die holder 4 is lowered, the upper dies of the plurality of dies MA to ME are lowered, and the forging material B is sandwiched between the upper die and the lower die to apply pressure, so that the forging material B is formed. can do.

At this time, in the first die MA, the upper die M
Since the forging material B is sandwiched by A1 and the lower die MA2 from above and below to be pressed and crushed, of the scales S formed around the forging material B, the scale S formed on the side of the forging material B is removed. It However, in the first mold MA,
Since the scales S formed on the upper and lower outer peripheries of the forging material B are sandwiched between the forging material B and the upper die MA1 and the lower die MA2, they cannot be removed and remain on the surface of the forging material B. There is. And, in the second die MB, the forging material B forged by the first die MA is 90 around its axis.
° It is mounted in a rotated state, so the second mold MB
When the forging material B is sandwiched by the upper die MA1 and the lower die MA2 from above and below and pressed and crushed, the scale S formed on the side of the forging material B, that is, the scale S that cannot be removed by the first die MA. Can be removed.

Therefore, according to the forging press 1 with the automatic feeder of this embodiment, the scale S is formed around the forging material B.
Even if is formed, the scale S around the entire circumference of the first mold MA
And the second mold MB can be removed, and the surface accuracy of the forged product can be improved.

Now, the first mold MA and the second mold MB which are the features of the present invention will be described. First, the first mold MA will be described. FIG. 1 is a schematic explanatory view of the first mold MA. Figure 1
As shown in (A), the first mold MA is composed of an upper mold MA1 and a lower mold MA2. At the center of the upper die MA1 and the lower die MA2 in the left-right direction, the lower surface of the upper die MA1 and the upper surface of the lower die MA2 are formed in a curved shape, that is, a vertically curved surface. As will be described later, the cylindrical forging material B can be curved by the curved shapes formed on the lower surface of the upper mold MA1 and the upper surface of the lower mold MA2.

The lower surface of the upper mold MA1 and the lower mold MA2
The upper surface of the above may be formed so that the space formed therebetween has a corrugated shape in a longitudinal sectional view, or may be formed in a V shape. The curved portion may be gently bent or may be sharply bent. That is, on the lower surface of the upper mold MA1 and the upper surface of the lower mold MA2, the forging material B molded by the first mold MA is the second mold MB.
Any shape is acceptable as long as it can be stably placed on the lower mold MB2.

As shown in FIGS. 1 (B) and 1 (D), end molding grooves Mg1 recessed in a semicircular shape in cross section are formed at both ends in the left-right direction of the upper mold MA1. The outer ends of the pair of left and right end forming grooves Mg1, Mg1 are provided such that the center axes of the inner surfaces thereof are coaxial and horizontal, and are orthogonal to the conveying direction of the forging material B by the automatic feeder 10. It is installed in. As shown in FIGS. 1 (C) and 1 (D), at the left and right ends of the lower die MA2, a semicircular cross-section is formed vertically below the pair of left and right end forming grooves Mg1 and Mg1. Material support groove Mg recessed in
2 are formed respectively. The pair of left and right material support grooves Mg2, Mg2 are provided such that the center axes of the inner surfaces thereof are coaxial and horizontal, and the center axes of the inner surfaces are orthogonal to the conveying direction of the forging material B by the automatic feeder 10. It is arranged as follows.

Therefore, if the forging material B is placed on the lower die MA2 so that both axial ends thereof are located above the pair of left and right material supporting grooves Mg2, Mg2, the forging material B is horizontal and is fed automatically. Are arranged so as to be orthogonal to the conveying direction of the forging material B. Moreover, since both axial ends of the forging material B are supported by the pair of left and right material supporting grooves Mg2, Mg2, the forging material B can be prevented from rolling on the lower die MA2. And the forging material B is the lower die M
The forging material B can be crushed from above and below by sandwiching and pressing with the upper die MA1 and the lower die MA2 in a state of being placed on A2, and among the scales S formed on the outer periphery of the forging material B, Scale S formed on the side of forging material B
Can be removed.

Further, the forging material B is sandwiched between the lower surface of the upper mold MA1 and the upper surface of the lower mold MA2 whose axial center portion is formed into a corrugated shape, and is alternately curved up and down. And
Both ends of the forging material B in the axial direction are provided with the pair of left and right end forming grooves Mg1, Mg1 and the pair of left and right material supporting grooves Mg2, M.
Since they are respectively sandwiched between g2, they are not curved and are formed in parallel and coaxial columnar shapes. In other words, in the first die MA, the forging material B has its axial center part curved up and down,
The both ends in the axial direction can be molded into a curved rod B1 (see FIG. 2 (C)) formed in a columnar shape in which the both ends are parallel and coaxial with each other.

Next, the second mold MB will be described. FIG. 2 is a schematic explanatory view of the second mold MB. As shown in FIG. 2 (A), the first mold MB is composed of an upper mold MB1 and a lower mold MB2. At the center of the upper die MB1 and the lower die MB2 in the left-right direction, the lower surface of the upper die MB1 is slightly convex, and the upper surface of the lower die MB2 is flat.

As shown in FIG. 2B, a material support groove M, which is recessed in a semicircular shape in cross section, is provided at both left and right ends of the lower mold MB2.
g3 are formed respectively. The pair of left and right material support grooves Mg3, Mg3 are provided such that the center axes of the inner surfaces thereof are coaxial and horizontal, and are arranged so as to be orthogonal to the conveying direction of the forging material B by the automatic feeder 10. There is. Then, a pair of left and right material supporting grooves Mg3, Mg
The radius of 3 is molded so as to have the same length as the radii of the left and right ends of the curved bar B1.

Therefore, if the curved bar B1 is placed on the lower die MB2 so that the left and right ends of the curved bar B are located in the pair of left and right material supporting grooves Mg3, Mg3, the forging material B is moved horizontally and by an automatic feeder. The forging material B can be arranged so as to be orthogonal to the conveying direction.

With the above-mentioned structure, the first die M
If A and the second die MB are used, the forging material B is formed by the first die MA such that the axial center portion thereof is alternately curved up and down, and the axial end portions thereof are parallel and coaxial with each other. It can be molded into a curved bar B1. Therefore, when the bending bar B1 is rotated 90 ° about its axis by the reversing mechanism 13 of the automatic feeding device 10 and placed on the lower mold MB2 of the second mold MB, the horizontal width of the bending bar B1 is increased. Since W becomes wider, it can be stably placed on the lower mold MB2 of the second mold MB (FIG. 2 (C)). Therefore, the second mold MB can reliably press the curved rod B1 from the direction rotated by 90 ° with respect to the direction in which the first mold MA is pressed, and therefore cannot be removed by the first mold MA. The scale S that has been removed can be reliably removed.

Further, since the forging material B is formed in a columnar shape in which both axial ends thereof are parallel and coaxial with each other, the pair of fingers 11, 11 of the automatic feeding device 10 are provided so as to be horizontal and face each other. Then, both ends of the curved rod B1 in the axial direction can be reliably sandwiched and supported. Therefore, the pair of fingers 11, 11 and the curved rod B1 can be easily fitted together, and the structure of the device can be simplified.

When molding a plurality of forged products from one forging material B, for example, when molding a plurality of rocker arms or the like from one forging material B, the forged products are connected by connecting portions. It is molded and the connection is finally discarded. When performing such molding, the structures of the first mold MA and the second mold MB may be the following structures.

FIG. 5 is a schematic explanatory view of a first mold MA of another embodiment. As shown in FIG. 5 (A), the first mold MA
Is composed of an upper mold MA1 and a lower mold MA2. At the center of the upper die MA1 and the lower die MA2 in the left-right direction, the lower surface of the upper die MA1 and the upper surface of the lower die MA2 are formed as flat surfaces parallel to each other. Further, as shown in FIGS. 5 (B) and 5 (C), material support grooves Mg2 recessed in a groove shape having a semicircular shape in cross section are formed at both ends in the left-right direction of the lower mold MA2. This pair of left and right material support grooves M
The center axes of the inner surfaces of g2 and Mg2 are coaxial and horizontal, and the center axes of the inner surfaces of the g2 and Mg2 are arranged so as to be orthogonal to the conveying direction of the forging material B by the automatic feeder 10. .

Therefore, when the forging material B is placed on the lower die MA2, the forging material B is arranged horizontally and orthogonal to the conveying direction of the forging material B by the automatic feeder. Moreover, the both axial ends of the material support groove Mg
2. Forging material B is the lower mold MA2 because it is supported by Mg2.
You can prevent rolling up. Then, when the forging material B is placed on the lower die MA2 and the forging material B is sandwiched and pressed by the upper die MA1 and the lower die MA2, the forging material B is crushed from above and below, and the upper surface and the lower surface are A square bar B2 having flat surfaces parallel to each other can be formed, and the forging material B among the scales S formed on the outer periphery of the forging material B
The scale S formed on the side surface of can be removed.

Next, the second mold MB will be described. FIG. 6 is a schematic explanatory view of the second mold MB. As shown in FIG. 6 (A), the second mold MB is composed of an upper mold MB1 and a lower mold MB2. A pair of support protrusions D parallel to the conveyance direction of the forging material B by the automatic feeding device 10 are formed in the left and right center portions of the upper die MB1 and the lower die MB2.
As shown in FIG. 6 (B) and FIG. 6 (C), this support protrusion D
The support groove Dg is formed in each of the support grooves Dg so as to be orthogonal to the conveying direction of the forging material B. The width W2 of the support groove Dg is formed to be slightly wider than the distance W1 between the lower surface of the upper die MA1 and the upper surface of the lower die MA2 in the first die MA.

With the above-mentioned construction, the first die M
By using A and the second mold MB, the forging material B can be molded by the first mold MA into a square bar B2 whose upper and lower surfaces are flat surfaces parallel to each other. Therefore, if the square bar B2 is rotated 90 ° around its axis and the square bar B2 is inserted into the support groove Dg of the support protrusion D, the square bar B2 can be supported by the support groove Dg of the support protrusion D. Moreover, the width W2 of the support groove Dg of the support protrusion D is more than the distance W1 between the lower surface of the upper mold MA1 and the upper surface of the lower mold MA2 in the first mold MA, that is, the distance between the parallel flat surfaces of the square bar B2. Since it is only slightly wider, the square bar B2 can be prevented from rotating around its axis in the support groove Dg of the support protrusion D. Therefore, the square B2 can be prevented from rolling on the lower mold MB2 of the second mold MB,
90 ° to the direction in which the first die MA presses the square bar B2
Since the pressure can be surely applied from the rotating direction, the scale S, which cannot be removed by the first mold MA, can be reliably removed.

In the square bar B2, the supporting groove D of the supporting protrusion D
The scale S cannot be removed from the part inserted into g. However, in the case of molding a plurality of products from one forging material B, if the die is designed so that the portion of the support protrusion D inserted into the support groove Dg becomes a connecting portion between adjacent products, The part is finally discarded,
Even if the scale S cannot be removed, it does not affect the surface accuracy of the forged product.

[0032]

According to the first aspect of the present invention, the forging material is a bending shaft whose upper and lower axes are curved by the first die, so that the forging material is stably placed on the second die. be able to. Therefore, the scale of the entire circumference of the forged material can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved. According to the invention of claim 2, in the automatic feeding device, the pair of fingers are
If they are provided so as to be horizontal and opposite to each other, both ends of the forging material in the axial direction can be reliably sandwiched and supported. Therefore, the pair of fingers and the forging material can be easily fitted together, and the structure of the device can be simplified. According to the invention of claim 3, by inserting the forging material into the support groove of the supporting protrusion, it is possible to prevent the forging material from rolling on the lower die of the second die. Therefore, the scale of the entire circumference of the forged material can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved. According to the invention of claim 4, since the forging material has a bending axis in which the axis line is vertically curved by the first die, the forging material can be stably placed on the second die. Therefore, the scale of the entire circumference of the forged material can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved.
According to the invention of claim 5, by inserting the forging material into the supporting groove of the supporting protrusion, the forging material can be prevented from rolling on the lower die of the second die. Therefore, the scale of the entire circumference of the forged material can be removed by the first step and the second step, and the surface accuracy of the forged product can be improved.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of a first mold MA.

FIG. 2 is a schematic explanatory diagram of a second mold MB.

FIG. 3 is a schematic explanatory view of a forging press 1 with an automatic feeding device of the present embodiment.

FIG. 4 is an explanatory diagram of an operation of reversing the forging material B by the reversing mechanism 13 of the automatic feeding device 10.

FIG. 5 is a schematic explanatory view of a first mold MA of another embodiment.

FIG. 6 is a schematic explanatory view of a second mold MB of another embodiment.

FIG. 7 is an explanatory view of a pressing action of a forging material having a scale formed thereon.

[Explanation of symbols]

1 Forging press with automatic feeder 10 Automatic feeder 11 fingers 13 Inversion mechanism MA first mold MB second mold B Forging material B1 curved bar D Support protrusion Dg support groove

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yutaka Ozaki             Sumitomo Heavy Industries, No. 5, Soukai-cho, Niihama-shi, Ehime Prefecture             Mechanical Industry Co., Ltd. Niihama Works (72) Inventor Masao Sato             Niigata Prefecture Minamikanbara-gun Sakaemachi Inoba Nitta 1300             Chiji Machinery Co., Ltd. F-term (reference) 4E087 AA08 BA17 CA11 CB01 EC01                       FA03 FA09 HA34

Claims (5)

[Claims] 1. A forging press comprising a plurality of dies for performing a plurality of molding steps and an automatic feeding device for laterally feeding a rod-shaped forging material to the plurality of dies, the automatic feeding The apparatus includes an inversion mechanism that rotates the forging material by 90 ° around its axis when the forging material is moved from the first die to the second die, and the upper die in the first die is used. The lower surface and the upper surface of the lower mold are formed in a curved shape, and when the forging material is molded by the first mold,
A forging press with an automatic feeder, characterized in that the forging material is a curved rod that is curved up and down. 2. The automatic feeding device is provided with a pair of fingers for sandwiching and supporting both ends of the forging material in the axial direction, and the first die is parallel to both ends of the forging material in the axial direction. The forging press with an automatic feeder according to claim 1, characterized in that an end forming groove for forming a coaxial columnar shape is formed. 3. A forging press provided with a plurality of molds for performing a plurality of molding steps and an automatic feeding device for laterally feeding a rod-shaped forging material to the plurality of molds, wherein the automatic feeding is performed. The apparatus includes an inversion mechanism that rotates the forging material by 90 ° around its axis when the forging material is moved from the first die to the second die, and the upper die in the first die is used. Of the lower die and the upper surface of the lower die are formed as flat surfaces parallel to each other, and a supporting protrusion having a supporting groove parallel to the axial direction of the forging material is formed on the upper surface of the lower die of the second die. The width of the support groove of the support protrusion is slightly wider than the thickness of the forging material formed by the first die in the up-down direction. 4. A forging press equipped with a plurality of dies for performing a plurality of molding steps and an automatic feeding device for laterally feeding a rod-shaped forging material to the plurality of dies, in a first die,
The forging material is formed into a curved rod that is curved up and down, and the forging material is moved around the axis by the automatic feeder.
A molding method in a forging press with an automatic feeding device, which is mounted on a second mold while being rotated by 0 °. 5. A forging press comprising: a plurality of molds for performing a plurality of molding steps; and an automatic feeding device for laterally feeding a rod-shaped forging material to the plurality of molds. The lower surface of the upper die and the upper surface of the lower die in the die are formed as flat surfaces parallel to each other, and the upper surface of the lower die of the second die has a support groove parallel to the axial direction of the forging material. A support protrusion is formed, and in the first die, the forging material is formed into flat surfaces whose upper and lower ends are parallel to each other, and the automatic feeding device rotates the forging material by 90 ° around its axis. A molding method in a forging press with an automatic feeding device, characterized by inserting into the supporting groove of the supporting protrusion of the second mold while performing.