JP2019155464A - Hot-forged article warping correction device and warping correction device - Google Patents

Abstract

To provide a hot-forged article warping correction device which can correct warping of a hot-forged article of a long form with good efficiency and high accuracy.SOLUTION: This device comprises: first and second clamp mechanisms 2, 3 which grip a hot-forged article W at a position separated in a longer direction; an intermediate side pressing mechanism 4 which presses a portion between gripping positions of respective clamp mechanisms in the longer direction of the hot-forged article; an outer side pressing mechanism 5 which presses a portion on an outer side with respect to the portion between the gripping positions of respective clamp mechanisms in the longer direction of the hot-forged article; and a reversal mechanism 6 which reverses respective holding mechanisms which grip the hot-forged article, thereby rotating the hot-forged article around an axis in the longer direction.SELECTED DRAWING: Figure 1

Description

  More particularly, the present invention relates to a method and a method for correcting a warpage of a hot forging product, and more particularly, a hot forging capable of correcting the warpage of a long hot forging product efficiently and with high accuracy. The present invention relates to an apparatus for correcting warping and bending of an article and a method of correcting warping and bending.

  As a conventional method for correcting the warpage of a hot forged product, a method by coining using a large press and a precision die is generally known (for example, see Patent Document 1). And since it is the present condition that it cannot correct to a regulation dimension only by coining processing, correction work (hammer correction) according to the gauge by an operator is needed after coining processing. The hot forged product is usually formed by a hot forging press, then subjected to heat treatment, then shot blasted, and then obtained through coining and correction work by the operator. It is done.

JP 05-305340 A

  However, the above-mentioned conventional method for correcting the warpage of a hot forged product employs coining processing using a large press and a precision die, so that complicated correction work by the operator is required after coining processing, which is efficient. It cannot be corrected, and it cannot be corrected with high accuracy by some workers. In coining processing, a very large pressure is applied to the mold, so that the mold is easily worn and broken. Furthermore, it is necessary to change the precision mold when the hot forged product to be corrected has different dimensions, shapes, and the like.

  The present invention has been made in view of the above-described present situation, and a warp bending correcting device and a warpage bending apparatus for a hot forging product capable of correcting the warpage bending of a long hot forging product efficiently and with high accuracy. The purpose is to provide a correction method.

The present invention is as follows.
1. A hot-forged product warpage bend correcting device for correcting warpage of a long hot forged product, wherein a first clamp mechanism and a second clamp mechanism grip the hot forged product at positions spaced apart in the longitudinal direction. A clamp mechanism, an intermediate pressing mechanism for pressing a portion between the gripping positions of the clamp mechanisms in the longitudinal direction of the hot forged product, and the clamp mechanisms in the longitudinal direction of the hot forged product. The outer pressing mechanism for pressing the part outside the gripping position and the clamp mechanism that grips the hot forged product are reversed to rotate the hot forged product around the longitudinal axis. And a reversing mechanism.
2. Each of the pressing mechanisms includes a measuring device that measures the amount of bending of the hot forged product, and is capable of pressing the hot forged product based on the amount of bending measured by the measuring device. The warp bend correction device for hot forgings as described.
3. Each pressing mechanism includes a pair of pressing pieces facing each other with the hot forged product held by each clamping mechanism and the pair of pressing pieces facing each other based on the amount of bending measured by the measuring device. And a pressing drive source to be moved to 2. The warp bend correction device for hot forgings as described.
4). Each clamp mechanism is displaceable to the support so as to grip and release the hot forged product between a support, a fixed clamp piece provided on the support, and the fixed clamp piece. 1. The movable side clamp piece to be supported and a displacement drive source for displacing the movable side clamp piece. To 3. The warpage bend correction apparatus for hot forgings according to any one of the above.
5). The said inversion mechanism is provided with the base body which supports the said support body rotatably about the axis | shaft of the elongate direction of the said hot forging, and the drive source for rotation which rotates the said support body. The warp bend correction device for hot forgings as described.
6). The reversing mechanism reverses the clamp mechanisms to rotate the hot forged product by 90 degrees around the longitudinal axis. To 5. The warpage bend correction apparatus for hot forgings according to any one of the above.
7). The clamp mechanisms and the pressing mechanisms are arranged side by side along the arrangement direction, and can be moved and positioned along the arrangement direction. To 6. The warpage bend correction apparatus for hot forgings according to any one of the above.
8). Above 1. To 7. A hot forging product warpage correction method using the hot forging product warpage correction device according to any one of the above, wherein the hot forging product gripped by the clamp mechanisms is used as the pressing mechanism. A first pressing step that presses in the first pressing step, a reversing step that reverses each clamping mechanism that grips the hot forged product pressed in the first pressing step by the reversing mechanism, and each of the reversed in the reversing step And a second pressing step of pressing the hot forged product held by the clamp mechanism with the pressing mechanisms.

According to the apparatus for correcting a warpage of a hot forged product according to the present invention, the first clamp mechanism and the second clamp mechanism that hold the hot forged product at positions separated in the longitudinal direction, and the longitudinal direction of the hot forged product. An intermediate pressing mechanism for pressing a portion between the gripping positions of each clamp mechanism, and an outer pressing for pressing a portion outside the gripping positions of each clamp mechanism in the longitudinal direction of the hot forged product. And a reversing mechanism that reverses each clamp mechanism that holds the hot forged product and rotates the hot forged product about an axis in the longitudinal direction. Thereby, the hot forging product gripped by each clamp mechanism is pressed by each pressing mechanism, each clamping mechanism that grips the pressed hot forging product is inverted by the reversing mechanism, and each inverted clamping mechanism The hot forged product gripped by is pressed by each pressing mechanism. Therefore, a plurality of locations along the longitudinal direction of the hot forged product and a plurality of locations along the longitudinal axis are pressed to correct the warpage. As a result, it is possible to efficiently and accurately correct the warpage of the long hot forged product regardless of the bending direction and the bending amount.
Moreover, when each said press mechanism is equipped with the measuring device which measures the bending amount of the said hot forging goods, and can press the said hot forging goods based on the bending amount measured with the said measuring device, It is possible to more efficiently and accurately correct the warpage of the forged product.
Further, when each of the pressing mechanisms includes a specific pair of pressing pieces and a pressing drive source, the pair of pressing pieces moves in the opposite direction based on the amount of bending measured by the measuring device by the pressing drive source. By doing so, the bending of the hot forged product is corrected by the pressing of the pressing piece.
Further, when each of the clamp mechanisms includes a specific support, a fixed clamp piece, a movable clamp piece, and a displacement drive source, the movable clamp piece is displaced by the displacement drive source to be fixed. The hot forging is gripped and released between the side clamp piece and the movable side clamp piece.
Further, when the reversing mechanism includes a specific base body and a rotation drive source, each clamp mechanism is reversed by rotating the support by the rotation drive source.
In addition, when the reversing mechanism reverses the clamp mechanisms and rotates the hot forged product by 90 degrees around the longitudinal axis, the pressing mechanism is orthogonal to the long direction of the hot forged product. It is pressed from the XY axis direction on the plane. Therefore, the warpage of the hot forged product can be corrected more efficiently and with high accuracy.
Further, when the clamp mechanisms and the pressing mechanisms are arranged along the alignment direction and are movable along the alignment direction and positioned so as to be positioned, When the size, shape, etc. of the forged product are changed, it can be easily handled by adjusting the fixing positions of the clamp mechanism and the pressing mechanism.
According to the method for correcting a warpage of a hot forged product according to the present invention, a first pressing step of pressing the hot forged product held by each clamp mechanism with each pressing mechanism, and a hot forging pressed in the first pressing step. A reversing step of reversing each clamp mechanism that grips the product with a reversing mechanism, and a second pressing step of pressing the hot forged product gripped by each clamp mechanism reversed in the reversing step with each pressing mechanism. Thereby, the some location along the longitudinal direction of a hot forging product and the some location along the axial direction of a longitudinal direction are pressed, and curvature curvature is corrected. As a result, it is possible to efficiently and accurately correct the warpage of the long hot forged product regardless of the bending direction and the bending amount.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
It is a top view of the curvature bend correction apparatus of the hot forging product which concerns on an Example. It is a side view of the clamp mechanism which concerns on an Example. It is a side view of the press mechanism which concerns on an Example. It is a principal part enlarged view of FIG. It is the VV sectional view enlarged view of FIG. It is operation | movement explanatory drawing of the said curvature correction apparatus of a hot forging product, (a) shows the open state of a clamp mechanism, (b) shows the holding state of a clamp mechanism, (c) is an inversion of a clamp mechanism. Indicates the state. It is operation | movement explanatory drawing of the said curvature correction apparatus of a hot forging product, (a) shows the measurement state of the amount of bending in the state before a clamp mechanism is reversed, (b) is a clamp mechanism reversed. The bending correction state in the previous state is shown, (c) shows the measurement state of the bending amount when the clamping mechanism is inverted, and (d) shows the bending correction state when the clamping mechanism is inverted. . It is operation | movement explanatory drawing of the said curvature correction apparatus of a hot forging, (a) shows the state at the time of bend correction start, (b) shows the state in the middle of bend correction, (c) is at the time of bend correction completion. Shows the state. It is a perspective view of the hot forging product which concerns on an Example. It is explanatory drawing for demonstrating the curvature correction apparatus of the hot forging goods which concerns on another form, (a) shows a form provided with a single outer side press mechanism, (b) is a some intermediate | middle side press mechanism. The form provided with is shown.

  The items shown here are exemplary and illustrative of the embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

1. Warp bend correcting device for hot forged product The warp bend correcting device for hot forged product according to this embodiment corrects the warped bend of hot forged product (W) that corrects the warped bend of the long hot forged product (W). It is apparatus (1), Comprising: The 1st clamp mechanism (2) and 2nd clamp mechanism (3) which hold | grip a hot forging product in the position spaced apart in the elongate direction, and each in the elongate direction of a hot forging product Between the intermediate side pressing mechanism (4) for pressing the part between the gripping positions of the clamp mechanism (2, 3) and the gripping position of each clamp mechanism (2, 3) in the longitudinal direction of the hot forged product The outer pressing mechanism (5) for pressing the outer portion and the clamp mechanisms (2, 3) holding the hot forged product are reversed to rotate the hot forged product around the longitudinal axis. A reversing mechanism (6) to be operated (see, for example, FIGS. 1 to 3).

  For example, each of the pressing mechanisms (4, 5) includes a measuring device (21) that measures the amount of bending of the hot forged product as a device for correcting the warped bending of the hot forged product according to the present embodiment. The form (for example, refer FIG. 3 etc.) which can press a hot forging based on the bending amount measured by (1) is mentioned.

  In the case of the above-described embodiment, for example, each of the pressing mechanisms (4, 5) includes a pair of pressing pieces (22, 22) facing each other with the hot forged product gripped by each clamping mechanism (2, 3) interposed therebetween. And a pressing drive source (23) that moves the pair of pressing pieces in the facing direction based on the amount of bending measured by the measuring instrument (21) (see, for example, FIG. 3).

  As a warp-bending correcting device for a hot forged product according to the present embodiment, for example, each of the clamp mechanisms (2, 3) includes a support (11), and a fixed-side clamp piece (12) provided on the support. The movable side clamp piece (13) supported by the support body (11) so as to be able to hold and release the hot forged product between the fixed side clamp piece and the displacement side for displacing the movable side clamp piece And a drive source (14) (see, for example, FIG. 2).

  In the case of the above-described embodiment, for example, the reversing mechanism (6) includes a base body (41) that supports the support body (11) so as to be rotatable about the longitudinal axis of the hot forged product, and the support body (11). , And a rotation drive source (42) that rotates the rotation source (see, for example, FIG. 2).

  For example, the reversing mechanism (6) inverts each clamping mechanism (2, 3) to turn the hot forged product (W) in the longitudinal direction. (For example, refer to FIG. 6 and the like). The “rotate 90 degrees” is intended to rotate approximately 90 degrees, and includes a form of rotating within a range of 90 degrees ± 5 degrees.

  For example, each of the clamping mechanisms (2, 3) and the pressing mechanisms (4, 5) are juxtaposed along the alignment direction (D) as the device for correcting a warp and bending of a hot forged product according to the present embodiment. In addition, there is a form (see, for example, FIG. 1 to FIG. 3) that is movable along the alignment direction and that can be positioned.

2. Warp bend correcting method for hot forged product The method for correcting the warped bend of hot forged product according to the present embodiment is a method for correcting the warped bend of the hot forged product according to the above-described embodiment (1). It is a warp bend correction method, Comprising: In the 1st press process and the 1st press process which press the hot forging goods (W) clamped by each clamp mechanism (2, 3) with each press mechanism (4, 5). Reversing step of reversing each clamping mechanism (2, 3) holding the pressed hot forging product (W) with the reversing mechanism (6), and grasping with each clamping mechanism (2, 3) reversed in the reversing step And a second pressing step of pressing the hot forged product (W) with the pressing mechanisms (4, 5) (see, for example, FIGS. 6 to 8).

  In addition, the code | symbol in the parenthesis of each structure described in the said embodiment shows the correspondence with the specific structure as described in the Example mentioned later.

  Hereinafter, the present invention will be specifically described with reference to the drawings. In the present embodiment, as the “hot forged product” according to the present invention, a hot forged product W as a material for a fuel delivery pipe for distributing and supplying fuel to the combustion chamber of the engine is illustrated (see FIG. 9). ). A fuel delivery pipe is obtained by drilling the hot forged product W.

(1) Configuration of Warp-Bending Correcting Device for Hot Forged Product As shown in FIG. 1, the hot-forged product warping / bending correcting device 1 according to this embodiment includes a first clamping mechanism 2, a second clamping mechanism 3, An intermediate pressing mechanism 4, an outer pressing mechanism 5, and a reversing mechanism 6 are provided. The clamp mechanisms 2 and 3 and the pressing mechanisms 4 and 5 are arranged side by side along the alignment direction D (that is, the long direction of the hot forged product W gripped by the clamp mechanisms 2 and 3). .

  The clamp mechanisms 2 and 3 hold and release the hot forged product W at positions separated in the longitudinal direction. Each of these clamping mechanisms 2 and 3 grips and releases the hot forged product W from a direction (specifically, the vertical direction) orthogonal to the longitudinal direction of the hot forged product W (see FIG. 6). In addition, each said clamp mechanism 2 and 3 hold | grips the reference | standard part formed with comparatively high precision among the hot forging products W as a holding position.

  As shown in FIG. 2, each of the clamp mechanisms 2 and 3 holds the hot forged product W between the support 11, the fixed-side clamp piece 12 attached to the support 11, and the fixed-side clamp piece 12. And the movable side clamp piece 13 supported movably by the support body 11 so that it may open | release, and the displacement cylinder 14 which displaces the movable side clamp piece 13 (illustrated as "the displacement drive source" concerning this invention) And. Each of the fixed-side clamp piece 12 and the movable-side clamp piece 13 is provided with grip portions 12a and 13a having substantially V-shaped notches (see FIG. 7).

  The support body 11 includes a supported portion 11a having an arc surface supported by a base body 41 described later, and a support portion 11b attached to the front side of the supported portion 11a. On the support portion 11b side, the upper portion of the main body 14a of the displacement cylinder 14 is supported so as to be swingable about a horizontal axis. Further, an intermediate portion of the swing lever 15 is supported by the support portion 11b so as to be swingable about the horizontal axis. The tip end side of the piston rod 14 b of the displacement cylinder 14 is pivotally supported on one end side of the swing lever 15. Further, a movable side clamp piece 13 is attached to the other end side of the swing lever 15. Then, due to the contraction of the piston rod 14b of the displacement cylinder 14, the swing lever 15 swings and the movable clamp piece 13 is separated from the fixed clamp piece 12 (see FIG. 6A), while the displacement cylinder 14 is extended, the swing lever 15 swings, the movable clamp piece 13 approaches the fixed clamp piece 12, and the hot forged product W is gripped between the two 12 and 13 (FIG. 6 (b)).

  As shown in FIGS. 1 and 2, the clamp mechanisms 2 and 3 are provided so as to be movable and positionable along the alignment direction D. Specifically, the guide rails 17 are laid along the alignment direction D on the frame 49 side. A slider 18 is supported on the guide rail 17 so as to be slidable along the longitudinal direction. A base body 41 (described later) that supports the support body 11 is attached to the slider 18, and a lock screw 19 is screwed together. The slider 18 (that is, the clamp mechanisms 2 and 3) is positioned with respect to the guide rail 17 by screwing the lock screw 19 and pressing the tip against the guide rail 17. On the other hand, the slider 18 can be slid with respect to the guide rail 17 by loosening the lock screw 19.

  As shown in FIG. 1, the intermediate pressing mechanism 4 can press a portion between the gripping positions of the clamp mechanisms 2 and 3 in the longitudinal direction of the hot forged product W. One intermediate pressing mechanism 4 is provided. Further, the outer pressing mechanism 5 can press the outer portion of the hot forged product W in the longitudinal direction than between the gripping positions of the clamp mechanisms 2 and 3. One outer pressing mechanism 5 is provided on each of the left and right sides of the intermediate pressing mechanism 4.

  As shown in FIG. 3, each of the pressing mechanisms 4 and 5 has a specific portion of the hot forged product W gripped by the clamp mechanisms 2 and 3 in a direction perpendicular to the longitudinal direction (specifically, a vertical direction). Press from. Each of the pressing mechanisms 4 and 5 includes a measuring device 21 that measures the amount of bending of the hot forged product W, and can press the hot forged product W based on the amount of bending measured by the measuring device 21. Further, each pressing mechanism 4, 5 is based on a pair of pressing pieces 22, 22 facing each other across the hot forged product W held by each clamping mechanism 2, 3, and the bending amount measured by the measuring device 21. And a pair of pressing pieces 22, 22 for pressing in the opposing direction (specifically, the vertical direction) (illustrated as a “pressing drive source” according to the present invention). Each of the pressing pieces 22 and 22 is provided with a substantially V-shaped pressing portion 22a (see FIG. 4).

  As shown in FIGS. 4 and 5, the measuring device 21 measures the amount of bending at or near the portion pressed by the pressing piece 22. The measuring device 21 is provided on an upper portion of a support 26 attached to a base plate 25 so as to be swingable around a horizontal axis, and provided on one end side of the swinging piece 27 to each clamp mechanism 2. 3, and a contact-type displacement sensor 29 provided on the support 11 side and in contact with the other end side of the swing piece 27. ing. The swing piece 27 is urged by a spring 30 in a direction in which the contact portion 28 contacts the lower portion of the hot forged product W (ie, counterclockwise in FIG. 4). Further, the abutting portion 28 abuts the lower portion of the hot forged product W through the notch 22 b formed in the lower pressing piece 22.

  As shown in FIG. 3, the contact-type displacement sensor 29 includes a contact that is urged upward by a built-in spring (not shown). The contact displacement sensor 29 is electrically connected to the control unit 31, and the measured value (that is, the amount of bending) is input to the control unit 31. The control unit 31 calculates a correction amount (that is, a correction moving distance of the pressing piece 22) based on the input bending amount. Note that the correction amount may be substantially zero depending on the amount of bending measured by the measuring device 21. In this case, the hot forged product W is not pressed by the pressing mechanisms 4 and 5.

  The main body 23a of the pressing cylinder 23 is mounted on a base plate 25 as shown in FIG. An attachment portion 33 to which a pair of pressing pieces 22 and 22 are attached is connected to the distal end side of the piston rod 23b of the pressing cylinder 23. The pressing cylinder 23 is controlled by the control unit 31 to move the pair of pressing pieces 22 and 22 in the opposing direction at an appropriate correction moving distance so as to press the hot forged product W with an appropriate correction amount. . The pressing of the hot forging product W by the pressing piece 22 is performed by pushing up the hot forging product W with the lower pressing piece 22 or pressing the hot forging product W with the upper pressing piece 22. .

  The operating position of the pressing cylinder 23 (that is, the height position of the pressing piece 22) is measured by the measuring device 35. The measuring instrument 35 includes a pin 36 provided on the attachment portion 33 and a contact-type displacement sensor 37 provided on the base plate 25 side and in contact with the lower end side of the pin 36. The contact-type displacement sensor 37 includes a contact urged upward by a built-in spring (not shown). Further, the contact displacement sensor 37 is electrically connected to the control unit 31, and the measured value is input to the control unit 31.

  As shown in FIGS. 1 and 3, the pressing mechanisms 4 and 5 are provided so as to be movable and positionable along the alignment direction D. Specifically, a slider 38 is supported on the above-described guide rail 17 so as to be slidable along the longitudinal direction. A base plate 25 is attached to the slider 38, and a lock screw 39 is screwed together. The slider 38 (that is, the pressing mechanism 4, 5) is positioned with respect to the guide rail 17 by screwing the lock screw 39 and pressing the tip against the guide rail 17. On the other hand, the slider 38 can be slid with respect to the guide rail 17 by loosening the lock screw 39.

  As shown in FIG. 2, the reversing mechanism 6 reverses the clamp mechanisms 2 and 3 that hold the hot forged product W to rotate the hot forged product W by 90 degrees around the longitudinal axis. The reversing mechanism 6 is provided for each of the clamping mechanisms 2 and 3. Further, the reversing mechanism 6 includes a base body 41 that supports the support body 11 so as to be rotatable about the longitudinal axis of the hot forged product W, and a rotating cylinder 42 that rotates the support body 11 (“ This is exemplified as a “rotation drive source”.

  The base body 41 has a pair of opposing walls 44, 44 raised from the slider 18. A support roller 45 is supported between the facing walls 44 and 44 so as to be rotatable about a horizontal axis. A supported portion 11 a of the support 11 is supported on each of the support rollers 45. The lower portion of the main body 42a of the rotating cylinder 42 is supported on the slider 18 side so as to be swingable about a horizontal axis. The tip end side of the piston rod 42b of the rotating cylinder 42 is supported on the support 11 side so as to be swingable around a horizontal axis. Then, due to the extension of the piston rod 42b of the rotating cylinder 42, the state A before the clamp mechanisms 2 and 3 are reversed together with the support 11 is set (see FIG. 6B). On the other hand, due to the contraction of the piston rod 42b of the rotating cylinder 42, the clamp mechanisms 2 and 3 together with the support body 11 are reversed to be in a reversed state B (see FIG. 6C).

  Here, each of the pressing mechanisms 4 and 5 can press the hot forged product W in the state A before the clamping mechanisms 2 and 3 are reversed by the reversing mechanism 6, and each clamping mechanism can be pressed by the reversing mechanism 6. The hot forged product W can be pressed in the state B in which 2 and 3 are reversed (see FIGS. 7B and 7D). Therefore, the hot forged product W is pressed by the pressing mechanisms 4 and 5 from the XY axis directions on a plane orthogonal to the longitudinal direction of the hot forged product W.

(2) Operation of Warp-Bending Correcting Device for Hot Forged Product Next, the operation of the warped-bending correcting device 1 for the hot forged product having the above configuration will be described. In each of the clamp mechanisms 2 and 3, as shown in FIG. 6 (a), a hot forged product to be corrected on the fixed-side clamp piece 12 in a state where the movable-side clamp piece 13 is separated from the fixed-side clamp piece 12. W is placed. Next, as shown in FIG. 6B, the movable side clamp piece 13 is displaced by the displacement cylinder 14, and the hot forged product W is gripped between the clamp pieces 12 and 13. At this time, as shown in FIG. 7A, the bending amounts a1, a2, and a3 are measured by the measuring device 21, and the correction amounts (that is, the pressing pieces 22) according to the bending amounts a1, a2, and a3 are measured by the control unit 31. Is calculated (see FIG. 8A).

  Here, since the correction location of the hot forged product W is affected by the adjacent portion and the correction amount is over, the correction amount is calculated by performing a calculation taking that amount into account. Since the bending amount and the bending pattern of the hot forged product W are various, the data of the measuring device is taken in each time, and each correction direction and the correction amount are calculated. Therefore, since a plurality of correction locations are corrected simultaneously according to the correction amounts determined individually, the number of corrections is reduced. Furthermore, after correction, if the correction cannot be made as calculated, the correction difference is taken into account at the next correction.

  Next, as shown in FIG. 7B, in each pressing mechanism 4, 5, the pressing piece 22 is moved by the pressing cylinder 23 to correct each correction portion of the hot forged product W in the direction opposite to the bending direction. Press with the amount (see FIG. 8B). Thereafter, when the pressing of the pressing piece 22 is released, each correction portion of the hot forged product W is slightly returned in the bending direction, so that the bending is eliminated (see FIG. 8C). That is, even in this return amount, the corrected movement amount is derived by calculation and added.

  Next, in each clamp mechanism 2, 3, as shown in FIG. 6C, each clamp mechanism 2, 3 holding the hot forged product W is reversed by the rotating cylinder 42 of the reversing mechanism 6. Then, in the state B in which the clamp mechanisms 2 and 3 are inverted, as shown in FIG. 7C, the bending amounts a1, a2, and a3 are measured by the measuring device 21, and the bending amounts a1, a2 are measured by the control unit 31. , A correction amount corresponding to a3 is calculated (see FIG. 8A). Next, in each of the pressing mechanisms 4 and 5, as shown in FIG. 7D, the pressing piece 22 is moved by the pressing cylinder 23 to correct each correction portion of the hot forged product W in the direction opposite to the bending direction. Press with the amount (see FIG. 8B). Thereafter, when the pressing of the pressing piece 22 is released, each correction portion of the hot forged product W is slightly returned in the bending direction, so that the bending is eliminated (see FIG. 8C). That is, even in this return amount, the corrected movement amount is derived by calculation and added.

  Thereafter, in each clamp mechanism 2, 3, each clamp mechanism 2, 3 holding the hot forged product W by the rotating cylinder 42 of the reversing mechanism 6 is returned to the state A before being reversed (see FIG. 6B). ). Then, the movable clamp piece 13 is displaced by the displacing cylinder 14 to release the grip of the hot forged product W (see FIG. 6A), and the hot forged product W whose warpage is corrected is taken out.

  In addition, when the dimension, shape, etc. of the hot forged product W to be corrected are changed, the clamp mechanisms 2, 3 and the pressing mechanisms 4, 5 are moved along the alignment direction D according to the change. And fix it at an appropriate fixing position.

(3) Effects of the Embodiment According to the hot forged product warpage correction apparatus 1 of the present embodiment, the first clamp mechanism 2 and the second clamp mechanism that hold the hot forged product W at positions separated in the longitudinal direction. 3, an intermediate side pressing mechanism 4 for pressing a portion between the gripping positions of the clamp mechanisms 2 and 3 in the longitudinal direction of the hot forged product W, and each clamp in the longitudinal direction of the hot forged product W The outer pressing mechanism 5 for pressing a portion outside the gripping position between the mechanisms 2 and 3 and the clamp mechanisms 2 and 3 gripping the hot forging product W are reversed to lengthen the hot forging product W. And a reversing mechanism 6 that rotates around the axis in the scale direction. As a result, the hot forgings W gripped by the clamp mechanisms 2 and 3 are pressed by the pressing mechanisms 4 and 5, and the clamping mechanisms 2 and 3 gripping the pressed hot forgings W are reversing mechanisms. 6, the hot forged product W gripped by the inverted clamping mechanisms 2 and 3 is pressed by the pressing mechanisms 4 and 5. Therefore, a plurality of locations along the longitudinal direction of the hot forged product W and a plurality of locations along the longitudinal axis are pressed to correct the warpage. As a result, it is possible to efficiently and accurately correct the warpage of the long hot forged product W regardless of the bending direction or the bending amount.

  Further, in this embodiment, each pressing mechanism 4, 5 includes a measuring device 21 that measures the bending amount of the hot forged product W, and the hot forging product W is changed based on the bending amount measured by the measuring device 21. It can be pressed. Thereby, the bending of the hot forged product W can be corrected more efficiently and with high accuracy.

  In the present embodiment, each pressing mechanism 4, 5 includes a specific pair of pressing pieces 22, 22 and a pressing cylinder 23. Accordingly, the pair of pressing pieces 22 and 22 are moved in the opposite direction based on the bending amount measured by the measuring instrument 21 by the pressing cylinder 23, whereby the bending of the hot forged product W by the pressing of the pressing piece 22. Is fixed.

  In the present embodiment, each clamp mechanism 2, 3 includes a specific support 11, a fixed side clamp piece 12, a movable side clamp piece 13, and a displacement cylinder 14. As a result, when the movable clamp piece 13 is displaced by the displacement cylinder 14, the hot forged product W is gripped and released between the fixed clamp piece 12 and the movable clamp piece 13.

  In this embodiment, the reversing mechanism 6 includes a specific base body 41 and a rotating cylinder 42. Thereby, the support body 11 is rotated by the rotating cylinder 42 so that the clamp mechanisms 2 and 3 are reversed.

  In this embodiment, the reversing mechanism 6 reverses the clamp mechanisms 2 and 3 to rotate the hot forged product W by 90 degrees around the longitudinal axis. Thereby, it presses from the XY-axis direction on the plane orthogonal to the elongate direction of the hot forging goods W by each press mechanism 4 and 5. FIG. Therefore, the bending of the hot forged product W can be corrected more efficiently and with high accuracy.

  Further, in the present embodiment, the clamp mechanisms 2 and 3 and the pressing mechanisms 4 and 5 are provided side by side along the alignment direction D, and can be moved and positioned along the alignment direction D. ing. Thereby, when the dimension, shape, etc. of the hot forged product W to be corrected are changed, it can be easily handled by adjusting the fixing positions of the clamping mechanisms 2 and 3 and the pressing mechanisms 4 and 5.

  In the present invention, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the said Example, although the form provided with the outer side press mechanism 5 in the both right and left sides of the intermediate side press mechanism 4 was illustrated, it is not limited to this, For example, as shown to Fig.10 (a), an intermediate side The outer pressing mechanism 5 may be provided only on one side of the pressing mechanism 4.

  Moreover, in the said Example, although the form provided with the single intermediate | middle side press mechanism 4 was illustrated, it is not limited to this, For example, as shown in FIG.10 (b), the some intermediate | middle side press mechanism 4 is provided. You may do it. Furthermore, in the said Example, although the form provided with the single outer side press mechanism 5 in one side of the intermediate | middle side press mechanism 4 was illustrated, it is not limited to this, For example, in one side of the intermediate | middle side press mechanism 4 A plurality of outer pressing mechanisms 5 may be provided.

  Moreover, in the said Example, although the form provided with the two 1st and 2nd clamp mechanisms 2 and 3 was illustrated, it is not limited to this, For example, you may make it provide 3 or more clamp mechanisms.

  Moreover, in the said Example, although the form provided with the inversion mechanism 6 for each clamp mechanism 2 and 3 was illustrated, it is not limited to this, For example, a single inversion mechanism corresponding to several clamp mechanisms 2 and 3 6 and a single reversing mechanism 6 may be used to reverse the clamping mechanisms 2 and 3 together.

  Moreover, in the said Example, although the reversing mechanism 6 which rotates the hot forging goods W 90 degree | times around the axis | shaft of the elongate direction was illustrated, it is not limited to this, For example, the hot forging product W is made into the elongate direction The reversing mechanism 6 may be rotated around an axis at an angle of less than 90 degrees (for example, 30 degrees, 45 degrees, etc.). In this case, for example, each clamping mechanism 2, 3 may be reversed a plurality of times by the reversing mechanism 6, and pressing by each pressing mechanism 4, 5 may be performed for each reversal.

  Moreover, in the said Example, although cylinders 14, 23, 42 were illustrated as drive sources, such as for a press, a displacement, and a rotation, it is not limited to this, For example, you may employ | adopt a motor. Moreover, in the said Example, although the measuring device 21 provided with the contact-type displacement sensor 29 was illustrated, it is not limited to this, For example, it is good also as the measuring device 21 provided with a non-contact-type displacement sensor.

  Furthermore, in the said Example, although the hot forging product W used as the material of a fuel delivery pipe was illustrated, it is not limited to this, For example, it is good also as the hot forging product W used as materials, such as a crankshaft and a connecting rod.

  The present invention is not limited to the embodiments described in detail above, and various modifications or changes can be made within the scope of the claims of the present invention.

  The present invention is widely used as a technique for correcting the bending of a long hot forged product.

  DESCRIPTION OF SYMBOLS 1; Warp bending correction apparatus of a hot forging product, 2; 1st clamp mechanism, 3; 2nd clamp mechanism, 4; Intermediate side press mechanism, 5; Outer side press mechanism, 6: Reversing mechanism, 11; ; Fixed side clamp piece, 13; movable side clamp piece, 14; displacement cylinder, 21; measuring instrument, 22; press piece, 23; press cylinder, 41; base body, 42; , W: Hot forged product.

Claims (8)

A warp bending correction device for a hot forging product for correcting warpage bending of a long hot forging product,
A first clamp mechanism and a second clamp mechanism for gripping the hot forged product at positions separated in the longitudinal direction;
An intermediate pressing mechanism for pressing a portion between the gripping positions of the clamp mechanisms in the longitudinal direction of the hot forged product;
An outer pressing mechanism for pressing the outer part of the hot forging product in the longitudinal direction than between the gripping positions of the clamp mechanisms;
Warping bend correction of a hot forging product, comprising: a reversing mechanism that reverses each clamp mechanism that grips the hot forging product and rotates the hot forging product about a longitudinal axis. apparatus.   2. The heat according to claim 1, wherein each pressing mechanism includes a measuring device that measures a bending amount of the hot forging product, and is capable of pressing the hot forging product based on the bending amount measured by the measuring device. Warp bend correction device for inter-forged products.   Each pressing mechanism includes a pair of pressing pieces facing each other with the hot forged product held by each clamping mechanism and the pair of pressing pieces facing each other based on the amount of bending measured by the measuring device. A hot-forged product warpage bend correction apparatus according to claim 2, further comprising: a pressing drive source that is moved to a position.   Each clamp mechanism is displaceable to the support so as to grip and release the hot forged product between a support, a fixed clamp piece provided on the support, and the fixed clamp piece. The apparatus for correcting a warpage of a hot forged product according to any one of claims 1 to 3, further comprising: a movable side clamp piece to be supported; and a displacement drive source for displacing the movable side clamp piece.   The said inversion mechanism is equipped with the base body which supports the said support body rotatably about the axis | shaft of the elongate direction of the said hot forging, and the drive source for rotation which rotates the said support body. Warp bend correction device for hot forgings.   The warping of the hot forged product according to any one of claims 1 to 5, wherein the reversing mechanism reverses the clamp mechanisms to rotate the hot forged product 90 degrees around a longitudinal axis. Correction device.   The clamp mechanisms and the pressing mechanisms are arranged side by side along the arrangement direction, and are movable and positioned along the arrangement direction. Warp bend correction device for hot forgings as described in 1. A method for correcting a warp bending of a hot forging product using the device for correcting a warping bending of a hot forging product according to any one of claims 1 to 7,
A first pressing step of pressing the hot forged product gripped by the clamp mechanisms with the pressing mechanisms;
A reversing step of reversing each clamping mechanism that grips the hot forged product pressed in the first pressing step by the reversing mechanism;
And a second pressing step of pressing the hot forged product held by the clamping mechanisms reversed in the reversing step with the pressing mechanisms, respectively. .

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