JP2018079505A - Crank shaft manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crank shaft manufacturing device capable of correcting a height difference between steps without a separate configuration and executing a correction step alone.SOLUTION: A twist part 140 includes a first jig 144 with which a first rotary die is coupled, a second jig 146 with which a second rotary die is coupled, and a third jig 142 with which a crank fixing die is coupled, thereby twisting a crank shaft prototype on the basis of alternately rotating the first rotary die and the second rotary die. A shape correction part 160 corrects a shape error on the basis of correction force generated in a twisted crank shaft prototype. A control part 180 controls the travel of a first slide, a second slide, and a third slide each.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an engine component manufacturing apparatus, and more particularly to an apparatus for manufacturing a crankshaft included in an engine.

  A crankshaft is a mechanical element that is connected to a crank and converts a reciprocating motion into a rotational motion. For example, the crankshaft can be provided in an internal combustion engine to convert the reciprocating motion of a piston into a rotational motion and transmit the output of the engine to the outside.

  In general, the crankshaft may have a three-dimensional and complicated shape as the number of cylinders of the engine used increases. Accordingly, the crankshaft may be manufactured through a simple molding process in some cases, but may also be manufactured through a twisting process that twists the formed crankshaft original.

  When the twist process is performed on the crankshaft original shape, an error may occur in the crankshaft due to the twist, and thus a correction process for correcting such an error may be additionally required.

  The following prior art documents perform the twist process and the correction process based on one slide. However, in some cases, it is necessary to adjust the movement distance of the mold that is lowered in the twisting process and the movement distance of the mold that is lowered in the correction process to be different from each other. There is a problem that the two travel distances are always substantially the same.

  Therefore, in correcting the height difference generated due to such a difference in moving distance, the following prior art document has a problem that a configuration such as a separate cradle capable of height adjustment is required. In addition, the following prior art documents have a problem that only the correction process cannot be performed without the twist process.

Japanese Patent Gazette No. 3358159 (publication date: October 11, 2002)

An object of the present invention is to provide a crankshaft manufacturing apparatus capable of correcting a height difference between processes without a separate configuration and capable of performing the correction process alone.
However, the object of the present invention is not limited to the above object, and can be variously expanded without departing from the spirit and scope of the present invention.

  In order to achieve an object of the present invention, a crankshaft manufacturing apparatus according to an embodiment of the present invention includes a first actuator that supplies a fixing force via a first slide, and a rotational force that is supplied via a second slide. A power supply unit including a second actuator to be supplied and a third actuator for supplying a correction force via a third slide, a first jig (jig) to which the first rotary mold is coupled, and a second rotary mold A second jig to be coupled, and a third jig to which a crank fixing mold is coupled, and the crankshaft original shape is formed based on alternately rotating the first rotating mold and the second rotating mold. A twist portion for twisting, a shape correction portion for correcting a shape error generated in the twisted crankshaft original shape based on the correction force, the first slide, the second slide, and the A control unit for controlling the movement distance of each of the three slides, wherein the crank fixing die fixes a crankshaft original shape inside a predetermined fixed mold frame based on the fixing force, and the first rotating die is the crank One end of the fixed crankshaft is disposed in one end of the fixed mold, and one of the fixed crankshaft originals is rotated in the first direction around the rotation axis based on the rotational force, and the second rotary mold is the crank fixed mold. The other of the fixed crankshaft original shapes arranged at the other end is rotated in the second direction opposite to the first direction around the rotation axis based on the rotational force.

  The first actuator may include a first cylinder coupled to the first slide, and the second actuator may include a second cylinder coupled to the second slide, The second actuator may include a third cylinder connected to the third slide.

  According to an embodiment, the power supply unit includes a first slide arm connected between the first jig and the second slide, and a gap between the second jig and the second slide. A second slide arm connected may be further included.

  According to an embodiment, the first jig and the second jig may have a ring shape with the rotation axis as a center, and the first slide arm includes a first slide and a first slide. Forming a hinge joint structure, forming the first jig and the second hinge joint structure, the second slide arm forming the second slide and the third hinge joint structure; The second jig and the fourth hinge joint structure can be formed.

  According to one embodiment, the second slide may be disposed inside the first slide.

  According to an embodiment, the second actuator can supply the rotational force after the first actuator supplies the fixing force, and the first rotating die and the second rotating die are: The crank fixing mold can rotate after fixing the crankshaft original shape.

  According to an embodiment, the shape correction unit may include a correction mold and a mold injection unit that pushes the twisted crankshaft original shape into the correction mold based on the correction force.

  According to an embodiment, the crankshaft manufacturing apparatus may further include a forming part that forms the crankshaft original shape.

  According to one embodiment, the molding unit may include a heating unit that heats the constituent material of the crankshaft original shape to a predetermined temperature, and a molding mold into which the heated constituent material is injected.

In the crankshaft manufacturing apparatus according to the embodiment of the present invention, the control unit controls the movement distances of the first to third slides, respectively, so that the height difference between processes can be corrected without a separate configuration.
In addition, since the twist unit and the shape correction unit are separately supplied with power from the power supply unit, the crankshaft manufacturing apparatus according to the embodiment of the present invention can perform the correction process alone without the twist process.
However, the effects of the present invention are not limited to the above effects, and can be variously expanded without departing from the spirit and scope of the present invention.

It is a block diagram which shows the crankshaft manufacturing apparatus by embodiment of this invention. It is drawing which shows an example of the crankshaft manufacturing apparatus of FIG. It is drawing which expanded the A section of the crankshaft manufacturing apparatus of FIG. It is drawing which looked at the crankshaft manufacturing apparatus of FIG. 3 from the B direction. It is drawing which looked at the crankshaft manufacturing apparatus of FIG. 3 from C direction. It is drawing which shows operation | movement of the twist part contained in the crankshaft manufacturing apparatus of FIG. It is drawing which shows operation | movement of the twist part contained in the crankshaft manufacturing apparatus of FIG. It is drawing which shows operation | movement of the twist part contained in the crankshaft manufacturing apparatus of FIG. It is drawing which shows operation | movement of the twist part contained in the crankshaft manufacturing apparatus of FIG. It is drawing which shows operation | movement of the twist part contained in the crankshaft manufacturing apparatus of FIG. It is drawing which shows operation | movement of the twist part contained in the crankshaft manufacturing apparatus of FIG.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

  FIG. 1 is a block diagram showing a crankshaft manufacturing apparatus according to an embodiment of the present invention.

  Referring to FIG. 1, the crankshaft manufacturing apparatus 100 may include a power supply unit 120, a twist unit 140, a shape correction unit 160, and a control unit 180. According to the embodiment, the crankshaft manufacturing apparatus 100 may further include a forming unit 190.

  The power supply unit 120 may include a first actuator, a second actuator, and a third actuator. Here, the first actuator can supply the fixing force FF via the first slide, the second actuator can supply the rotational forces SF1 and SF2 via the second slide, and the third actuator Can supply the correction force CF via the third slide.

  The first actuator may include a first cylinder, the second actuator may include a second cylinder, and the third actuator may include a third cylinder. Here, the first cylinder may be connected to the first slide, the second cylinder may be connected to the second slide, and the third cylinder may be connected to the third slide. Therefore, the power generated by the first to third cylinders can be transmitted to the first to third slides, respectively.

  The molding part 190 can mold the crankshaft original OCR. For example, the molding unit 190 may include a heating unit and a molding mold. Here, the heating unit can heat the constituent material of the crankshaft original OCR to a predetermined temperature, and the heated constituent material can be injected into the molding mold. As a result, the crankshaft original shape OCR corresponding to the shape of the forming mold can be formed.

  The twist unit 140 includes a crank fixing mold, a first jig 144 to which the first rotating mold is coupled, a second jig 146 to which the second rotating mold is coupled, and a third jig to which the crank fixing mold is coupled. A jig 142 may be included. Here, the crank fixing mold can fix the crankshaft original OCR in a predetermined fixed mold frame based on the fixing force FF, and the first rotating mold and the second rotating mold have the rotational force SF1, The crankshaft original shape OCR fixed based on SF2 can be twisted.

  The crank fixing mold can fix the crankshaft original OCR inside a predetermined fixed mold based on the fixing force FF. For this reason, the third jig 142 may be connected to the first slide, and the first actuator can supply the fixing force FF to the crank fixing mold through the first slide and the third jig 142.

  The first rotating mold may be coupled to one end of the crank fixed mold. Therefore, the first rotating mold can rotate one of the fixed crankshaft original OCRs in the first direction S1 around the first rotating shaft based on the first rotating force SF1.

  The second rotating mold can be coupled to the other end of the crank fixed mold. Therefore, the second rotating mold can rotate the other of the fixed crankshaft original OCR in the second direction opposite to the first direction S1 around the second rotating shaft based on the second rotational force SF2. it can.

  The first rotating mold can be rotated by the first jig 144. The first jig 144 may have a ring shape centered on the first rotation axis, and may surround the first rotation mold. Similarly, the second rotating mold can be rotated by the second jig 146. The second jig 146 may have a ring shape centered on the second rotation axis, and may surround the second rotation mold.

  As for the first rotational force SF1 and the second rotational force SF2, the rotational forces SF1 and SF2 supplied via the second slide are respectively supplied to the first rotary die and the second rotary die via separate members. Can be a thing. For example, the power supply unit 120 may further include a first slide arm and a second slide arm.

  Here, the first slide arm may be connected between the first jig 144 and the second slide, and the second slide arm is connected between the second jig 146 and the second slide. Also good. Accordingly, the first rotational force SF1 is transmitted to the first rotary mold via the second slide, the first slide arm and the first jig 144, and the second rotational force SF2 is transmitted to the second slide and the second slide arm. And can be transmitted to the second rotating mold through the second jig 146.

  The first slide arm can form a second hinge and a first hinge joint structure, and the first slide arm can form a first jig 144 and a second hinge joint structure. Meanwhile, the second slide arm can form the second slide and the third hinge joint structure, and the second slide arm can form the second jig 146 and the fourth hinge joint structure. Accordingly, the first rotational force SF1 is transmitted to the first rotational mold based on the first and second hinge joint structures, and the second rotational force SF2 is transmitted to the second rotational mold based on the second and third hinge joint structures. Can be communicated to.

  The first rotation axis and the second rotation axis may be parallel to each other. Further, the first rotation axis and the second rotation axis may be substantially the same. In other words, the first rotating mold can rotate in the first direction S1 around the first rotating shaft, and the second rotating mold can rotate in the second rotation substantially parallel to or the same as the first rotating shaft. It can rotate in the second direction S2 around the axis. As a result, the first rotating mold and the second rotating mold can rotate alternately, and the crankshaft original OCR can be twisted.

  Depending on the embodiment, the first actuator and the second actuator may have different operation timings. For example, the second actuator can supply the rotational forces SF1 and SF2 after the first actuator supplies the fixing force FF. As a result, the first rotating mold and the second rotating mold of the twist portion 140 can rotate after the crank fixing mold fixes the crankshaft original OCR.

  For this reason, the second slide can be disposed inside the first slide. In this case, the second slide moves together with the first slide, and when the supply of the fixing force FF is completed by the movement of the first slide, the rotational force SF1, SF2 can be supplied by the movement of the second slide.

  The shape correction unit 160 can correct the shape error generated in the twisted crankshaft original TCR based on the correction force CF. In other words, the shape correction unit 160 is supplied with the twisted crankshaft original shape TCR immediately after the twisting process, and the shape generated in the crankshaft original shape TCR twisted based on the correction force CF supplied through the third slide. The crankshaft CR can be completed by correcting the error.

  The shape correction unit 160 may include a correction mold and a mold injection unit. The straightening mold may have a shape that corresponds to the ideal shape that the twisted crankshaft prototype TCR should have. The mold injection part can push the crankshaft original shape TCR twisted based on the correction force CF into the correction mold. As a result, the shape error generated by the twist unit 140 can be corrected inside the correction mold.

  The controller 180 can control the movement distances of the first slide, the second slide, and the third slide, respectively. For example, the control unit 180 can generate the control signal CTRL for controlling the movement distance of the first to third slides so that the movement distance of the first slide and the movement distance of the third slide are different.

  The moving distance of each of the first to third slides may affect the moving distance of the correction mold included in the crank fixed mold, the first rotating mold, the second rotating mold, and the shape correcting unit 160. That is, the height between each mold and the cradle under the mold may be affected by the moving distance of each of the first to third slides. Therefore, the control unit 180 can control the height between the mold and the cradle by controlling the movement distance of each of the first to third slides, and the height between the twist process and the correction process can be controlled. The difference can be corrected.

  In the crankshaft manufacturing apparatus 100 according to the embodiment of the present invention, since the control unit 180 controls the movement distances of the first to third slides, the height difference between the processes can be corrected without a separate configuration.

  2 is a drawing showing an example of the crankshaft manufacturing apparatus of FIG. 1, FIG. 3 is an enlarged view of portion A of the crankshaft manufacturing apparatus of FIG. 2, and FIG. 4 is a crankshaft manufacturing apparatus of FIG. FIG. 5 is a drawing of the apparatus viewed from the B direction, and FIG. 5 is a drawing of the crankshaft manufacturing apparatus of FIG.

  2 to 5, the crankshaft manufacturing apparatus 200 may include a power supply unit, a twist unit 240, a shape correction unit 260, and a control unit. According to the embodiment, the crankshaft manufacturing apparatus 200 may further include a forming part.

  The power supply unit may include a first actuator, a second actuator, and a third actuator. Here, the first actuator can supply the fixing force via the first slides 222-1 and 222-2, the second actuator can supply the rotational force via the second slide 224, The three actuators can supply the correction force via the third slides 227-1 and 227-2.

  The first actuator may include first cylinders 221-1 and 221-2, the second actuator may include second cylinder 223, and the third actuator may include third cylinders 226-1 and 226-2. . Here, the first cylinders 221-1 and 221-2 may be connected to the first slides 222-1 and 222-2, the second cylinder 223 may be connected to the second slide 224, and the third cylinder. 226-1 and 226-2 may be connected to the third slides 227-1 and 227-2. Accordingly, the motive power generated by the first to third cylinders 221-1, 221-2, 223, 226-1, and 226-2 is used as the first to third slides 222-1, 222-2, 224, and 227-. 1 and 227-2, respectively.

  The forming part can form the original crankshaft. For example, the molding unit may include a heating unit and a molding mold. Here, the heating unit can heat the constituent material of the crankshaft original shape to a predetermined temperature, and the heated constituent material can be injected into the molding mold. As a result, a crankshaft original shape corresponding to the shape of the forming mold can be formed.

  The twist unit 240 may include a crank fixing mold, a first jig to which the first rotating mold is coupled, and a second jig to which the second rotating mold is coupled. Here, the crank fixing mold can fix the crankshaft original shape inside a predetermined fixed mold frame based on the fixing force, and the first rotating mold and the second rotating mold are fixed based on the rotating force. The original crankshaft can be twisted.

  The crank fixing mold can fix the crankshaft original shape inside a predetermined fixed mold based on the fixing force. Therefore, the third jig to which the crank fixing mold is coupled is connected to the first slides 222-1 and 222-2, and the first actuator is connected to the crank via the first slides 222-1 and 222-2. A fixing force can be supplied to the fixed mold.

  The first rotating mold may be coupled to one end of the crank fixed mold. Therefore, the first rotating mold can rotate one of the fixed crankshaft original shapes around the first rotating shaft in the first direction based on the first rotating force.

  The second rotating mold can be coupled to the other end of the crank fixed mold. Therefore, the second rotating mold can rotate the other of the fixed crankshaft original shape around the second rotation axis in the second direction opposite to the first direction based on the second rotational force.

  The first rotating mold can be rotated by the first jig. The first jig may have a ring shape centered on the first rotation axis, and may surround the first rotation mold. Similarly, the second rotating mold can be rotated by the second jig. The second jig may have a ring shape centered on the second rotation axis, and may surround the second rotation mold.

  The first rotational force and the second rotational force are obtained by supplying the rotational force supplied via the second slide 224 to the first rotational die and the second rotational die via separate members, respectively. obtain. For example, the power supply unit may further include a first slide arm 225-1 and a second slide arm 225-2.

  Here, the first slide arm 225-1 may be connected between the first jig and the second slide 224, and the second slide arm 225-2 may include the second jig and the second slide 224. It may be connected between. Accordingly, the first rotational force may be transmitted to the first rotational mold via the second slide 224 and the first slide arm 225-1, and the second rotational force is transmitted to the second slide 224 and the second slide arm. It may be transmitted to the second rotating mold via 225-2.

  The first slide arm 225-1 can form a first hinge joint structure with the second slide 224, and the first slide arm 225-1 can form a first jig and a second hinge joint structure. it can. On the other hand, the second slide arm 225-2 can form a third hinge joint structure with the second slide 224, and the second slide arm 225-2 forms a second jig and a fourth hinge joint structure. be able to. Accordingly, the first rotational force may be transmitted to the first rotary mold based on the first and second hinge joint structures, and the second rotational force is the second based on the second and third hinge joint structures. It may be transmitted to a rotating mold.

  The first rotation axis and the second rotation axis may be parallel to each other. Further, the first rotation axis and the second rotation axis may be substantially the same. In other words, the first rotating mold can rotate in the first direction around the first rotation axis, and the second rotating mold can be substantially parallel to the first rotation axis or the same first rotation mold. It can rotate in the second direction around the two rotation axes. As a result, the first rotating mold and the second rotating mold can rotate alternately, and the crankshaft prototype can be twisted.

  The twist process of the twist unit 240 will be described in detail with reference to FIGS. 6 to 11 below.

  Depending on the embodiment, the first actuator and the second actuator may have different operation timings. For example, the second actuator can supply the rotational force after the first actuator supplies the fixing force. As a result, the first rotating die and the second rotating die of the twist portion 240 can rotate after the crank fixing die fixes the crankshaft original shape.

  For this reason, the second slide 224 can be disposed inside the first slides 222-1 and 222-2. In this case, the second slide 224 may be moved together with the first slides 222-1 and 222-2, and when the supply of the fixing force is completed by the movement of the first slides 222-1 and 222-2, the second slide 224 is moved. The rotational force can be supplied by the movement of 224.

  The shape correction unit 260 can correct a shape error generated in the twisted crankshaft original shape based on the correction force. In other words, the shape correcting unit 260 is supplied with the twisted crankshaft original shape immediately after the twisting process, and is twisted based on the correcting force supplied through the third slides 227-1 and 227-2. The shape error generated in the original shape can be corrected.

  The shape correction unit 260 may include a correction mold and a mold injection unit. The orthodontic mold may have a shape that corresponds to the ideal shape that the twisted crankshaft prototype should have. The mold injection part can push the crankshaft original shape twisted based on the correction force into the correction mold. As a result, the shape error generated by the twist unit 240 can be corrected inside the correction mold.

  The control unit can control the movement distances of the first slides 222-1 and 222-2, the second slide 224, and the third slides 227-1 and 227-2, respectively. For example, the controller may control the first to third slides 222-1 and 222 so that the movement distances of the first slides 222-1 and 222-2 are different from the movement distances of the third slides 227-1 and 227-2. A control signal for controlling the moving distance of −2, 224, 227-1, and 227-2 can be generated.

  The movement distances of the first to third slides 222-1, 222-2, 224, 227-1, and 227-2 are as follows: a crank fixing mold, a first rotating mold, a second rotating mold, and a shape correcting unit 260. This may affect the moving distance of the correction mold contained in the mold. That is, the height between each mold and the cradle under the mold affects the moving distance of each of the first to third slides 222-1, 222-2, 224, 227-1, 227-2. May receive. Therefore, the control unit controls the movement distance of each of the first to third slides 222-1, 222-2, 224, 227-1, and 227-2 to increase the height between the mold and the cradle. The height difference between the twist process and the correction process can be corrected.

  6 to 11 are views showing the operation of the twist unit included in the crankshaft manufacturing apparatus of FIG.

  Referring to FIGS. 6 to 11, the twist portion includes the first jigs 244-1 and 244-2, the second jigs 246-1 and 246-2, and the third jig to which the crank fixing mold is coupled. May be included. The first jigs 244-1 and 244-2 may be coupled to the first rotating mold, and the second jigs 246-1 and 246-2 may be coupled to the second rotating mold.

  The first rotating mold, the second rotating mold, and the crank fixed mold may have different shapes depending on the shape of the target crankshaft, and the first jigs 244-1, 244-2, second The jigs 246-1 and 246-2 and the third jig can be attached and detached. That is, the inner surfaces of the first rotating mold, the second rotating mold, and the crank fixed mold may have a shape corresponding to the shape of the crankshaft, and the first rotating mold, the second rotating mold, and the crank. The outer surface of the fixed mold may have a shape that can be attached to and detached from the first jigs 244-1 and 244-2, the second jigs 246-1 and 246-2, and the third jig.

  The first jigs 244-1 and 244-2 may include a first upper jig 244-1 and a first lower jig 244-2, and the first rotary mold includes the first upper rotary mold and the first upper jig. One lower rotating mold may be included. The first upper jig 244-1 may be connected to the first upper rotating mold, and the first lower jig 244-2 may be connected to the first lower rotating mold.

  The second jigs 246-1 and 246-2 may include a second upper jig 246-1 and a second lower jig 246-2, and the second rotating mold includes the second upper rotating mold and the second upper jig 246-1. Two lower rotating molds may be included. The second upper jig 246-1 may be connected to the second upper rotary mold, and the second lower jig 246-2 may be connected to the second lower rotary mold.

  The first slide arm 225-1 may be connected to the first upper jig 244-1, and the second slide arm 225-2 may be connected to the second upper jig 246-1.

  Referring to FIGS. 6 and 9, after the original crankshaft is placed on the first lower rotary mold, the first slides 222-1 and 222-2 of FIG. 4 may be lowered. As a result, the first upper jig 244-1 and the first upper rotary mold can be lowered, and the second upper jig 246-1 and the second upper rotary mold can be lowered.

  7 and 10, the first upper jig 244-1 and the first lower jig 244-2 may be connected to each other, and the second upper jig 246-1 and the second lower jig 246- are connected. 2 may be connected to each other. That is, the first upper rotating mold and the first lower rotating mold may be coupled, and the second upper rotating mold and the second lower rotating mold may be coupled. Therefore, the first rotating mold may surround one of the crankshaft original shapes, and the second rotating mold may surround the other of the crankshaft original shapes.

  After the first rotating mold and the second rotating mold surround the crankshaft original shape, the second slide 224 of FIG. 4 can be lowered. Accordingly, the first slide arm 225-1 and the second slide arm 225-2 connected to the second slide 224 may also descend.

  8 and 11, the first jigs 244-1 and 244-2 may rotate clockwise as the first slide arm 225-1 descends. Similarly, the second jigs 246-1 and 246-2 can rotate counterclockwise simultaneously with the second slide arm 225-2 descending.

  Since the first rotating mold rotates together with the first jigs 244-1 and 244-2, one of the crankshaft original shapes surrounded by the first rotating mold can rotate clockwise. On the other hand, since the second rotating mold rotates together with the second jigs 246-1 and 246-2, the other crankshaft original shape surrounded by the second rotating mold can rotate counterclockwise.

  As described above, the twist unit 240 of FIG. 2 can twist the original crankshaft shape by alternately rotating the first rotating mold and the second rotating mold.

  As mentioned above, although the crankshaft manufacturing apparatus by embodiment of this invention was demonstrated with reference to drawings, the said description is an ordinary thing and the normal knowledge in the said technical field is in the range which does not deviate from the technical idea of this invention. It can be modified and changed by those who have it. For example, in the above description, the twist portion includes the first and second jigs, but the type of the twist portion is not limited to this.

The present invention can be applied in various ways to manufacture products that require a crankshaft. For example, the present invention can be applied to transportation means including an internal combustion engine such as an automobile.
Although the above description has been made with reference to the embodiments of the present invention, those having ordinary knowledge in the technical field are within the scope of the spirit and scope of the present invention described in the claims below. It will be understood that the present invention can be variously modified and changed.

100, 200 Crankshaft manufacturing apparatus 120 Power supply unit 140, 240 Twist unit 142 Third jig 144, 244-1, 244-2 First jig 146, 246-1, 246-2 Second jig 160, 260 Shape correction part 180 Control part 190 Molding part

Claims (9)

A power supply unit that includes a first actuator that supplies a fixing force via the first slide, a second actuator that supplies a rotational force via the second slide, and a third actuator that supplies a correction force via the third slide. When,
The first rotating mold includes a first jig to which the first rotating mold is coupled, a second jig to which the second rotating mold is coupled, and a third jig to which the crank fixing mold is coupled. And a twist portion for twisting the crankshaft original shape based on alternately rotating the second rotating mold,
A shape correction unit that corrects a shape error generated in the twisted crankshaft original shape based on the correction force;
A control unit for controlling the movement distance of each of the first slide, the second slide, and the third slide;
Including
The crank fixing mold fixes the crankshaft original shape inside a predetermined fixed mold based on the fixing force,
The first rotating mold is disposed at one end of the crank fixing mold, and rotates one of the fixed crankshaft original shapes in the first direction around the rotating shaft based on the rotational force,
The second rotating mold is disposed at the other end of the crank fixed mold, and the other of the fixed crankshaft original shape is opposite to the first direction around the rotating shaft based on the rotational force. A crankshaft manufacturing apparatus that rotates in the second direction. The first actuator includes a first cylinder connected to the first slide,
The second actuator includes a second cylinder connected to the second slide,
The crankshaft manufacturing apparatus according to claim 1, wherein the second actuator includes a third cylinder connected to the third slide. The power supply unit
A first slide arm connected between the first jig and the second slide;
A second slide arm connected between the second jig and the second slide;
The crankshaft manufacturing apparatus according to claim 2, further comprising: The first jig and the second jig have a ring shape with the rotation axis as a center,
The first slide arm forms a first hinge joint structure with the second slide, forms a first hinge joint structure with the first jig,
The crankshaft manufacturing method according to claim 3, wherein the second slide arm forms a third hinge joint structure with the second slide, and forms a second hinge joint structure with the second jig. apparatus.   The crankshaft manufacturing apparatus according to claim 3, wherein the second slide is disposed inside the first slide. The second actuator supplies the rotational force after the first actuator supplies the fixing force,
2. The crankshaft manufacturing apparatus according to claim 1, wherein the first rotating die and the second rotating die rotate after the crank fixing die fixes the crankshaft original shape. 3. The shape correction part is
Straightening mold,
2. The crankshaft manufacturing apparatus according to claim 1, further comprising: a mold injection unit that pushes the twisted crankshaft original shape into the correction mold based on the correction force. 3.   The crankshaft manufacturing apparatus according to claim 1, further comprising a forming portion that forms the crankshaft original shape. The molded part is
A heating section for heating the constituent material of the crankshaft original shape to a predetermined temperature;
The crankshaft manufacturing apparatus according to claim 8, further comprising a molding mold into which the heated constituent material is injected.

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