JP6317803B1 - Crankshaft manufacturing apparatus and crankshaft manufacturing method - Google Patents

Abstract

The present invention provides a crankshaft manufacturing apparatus that is relatively low in cost and does not require expert knowledge for operation or repair. A crankshaft manufacturing apparatus includes a twist unit and a hydraulic drive unit. The twist unit includes first and second jigs to which the first and second rotating molds are respectively coupled, and the first and second rotating molds are rotated based on alternately rotating the first and second rotating molds. Twist the crankshaft prototype inside the mold. Each of the first jig and the second jig includes a lower jig and an upper jig. The upper jig is coupled to the lower jig, rotated by a predetermined angle in the coupled state, separated from the lower jig in the rotated state, and separated from the lower jig by a first distance already set from the lower jig. Ascends, rises for the first distance, and then rotates back in the reverse direction of rotation. The hydraulic drive unit returns the lower jig by rotating the lower jig in the reverse direction when the upper jig rises from the lower jig by a predetermined second distance. [Selection] Figure 1

Description

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

  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.

  On the other hand, a relatively small power may be required during the twist process. For example, when a hydraulic motor is used to supply a small amount of power, the cost may increase because an electrical system is required for driving and the hydraulic circuit becomes relatively complicated. Furthermore, there is a problem that expert knowledge may be required to operate and repair this.

  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 that is relatively low in cost and does not require expert knowledge to operate or repair.

  Another object of the present invention is to provide a crankshaft manufacturing method that is relatively low in cost and does not require expert knowledge to operate or repair.

  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 and a second jig (jig) in which a hydraulic drive unit and a first and a second rotary mold are respectively coupled. A twist portion for twisting a crankshaft original shape inside the first and second rotating molds based on alternately rotating the first and second rotating molds, and the first and second rotating molds Each of the two jigs is coupled to the lower jig and the lower jig, and is rotated by a predetermined angle in the coupled state, separated from the lower jig in the rotated state, and separated from the lower jig after being separated. An upper jig that rises by a first distance set from the tool and that rises by the first distance and then rotates and returns in the reverse direction of the rotation. The jig is already set from the lower jig. And to return the lower jig by the lower jig is rotated to the opposite direction when elevated as the second distance.

  According to an embodiment, the crankshaft manufacturing apparatus includes a first actuator that supplies a fixing force via a first slide, a second actuator that supplies a rotational force via a second slide, and a correction force. A power supply unit including a third actuator for supplying via a third slide; a shape correction unit for correcting a shape error generated in the original shape of the crankshaft twisted by the twist unit based on the correction force; And a control unit that controls the movement distances of one slide, the second slide, and the third slide, respectively, and the twist unit fixes the crankshaft original shape inside based on the fixing force. The mold may further include a third jig to which the mold is coupled, and the first rotating mold is the crank fixing mold. One of the fixed crankshaft original shapes can be rotated in the first direction around the rotation axis based on the rotational force, and the second rotating mold is the same as the crank fixed mold. The other of the fixed crankshaft original shapes arranged at the other end can be rotated in the second direction opposite to the first direction around the rotation axis based on the rotational force.

  According to an exemplary embodiment, the first actuator may include a first cylinder connected to the first slide, and the second actuator may include a second cylinder connected to the second slide. The third actuator may include a third cylinder connected to the third slide.

  According to an embodiment, the power supply unit is connected between the first slide arm connected between the first jig and the second slide, and between the second jig and the second slide. And a second slide arm.

  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 the second slide and a first hinge. A hinge joint structure can be formed, the first jig and the second hinge joint structure can be formed, and the second slide arm can form the second slide and the third hinge joint structure. The second jig and the fourth hinge joint structure can be formed.

  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 be rotated after fixing the crankshaft original shape.

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

  According to an 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 order to achieve another object of the present invention, a method for manufacturing a crankshaft according to an embodiment of the present invention includes alternately rotating first and second rotating molds to which first and second jigs are respectively coupled. And twisting the crankshaft prototype inside the first and second rotating molds, and correcting the shape error generated in the twisted crankshaft prototype. A step in which an upper jig and a lower jig included in each of the first and second jigs are coupled; and the upper jig and the lower jig are coupled in a state where the upper jig and the lower jig are coupled to each other. A step of rotating by an angle, a step of separating the upper jig from the lower jig in a rotated state, and a first distance in which the upper jig is already set from the lower jig after being separated. A step in which the upper jig is rotated in the reverse direction of the rotation after returning to the first distance after the first distance has been raised, and a second in which the upper jig is already set from the lower jig. The lower jig is rotated in the reverse direction and returned when the distance is increased.

  According to an exemplary embodiment, the lower jig may be rotated by the hydraulic drive unit in the different direction by the predetermined angle.

In the crankshaft manufacturing apparatus and the crankshaft manufacturing method according to the embodiment of the present invention, since the hydraulic drive unit returns the lower jig, the cost is relatively small, and expert knowledge is not required for operation or repair. .
Furthermore, in the crankshaft manufacturing apparatus and the crankshaft manufacturing method according to the embodiment of the present invention, since the control unit controls the moving distances of the first to third slides, the height difference between processes is corrected without a separate configuration. be able to. In the crankshaft manufacturing apparatus and the crankshaft manufacturing method according to the embodiment of the present invention, since the twist unit and the correction unit are separately supplied with power from the power supply unit, the correction process is performed independently without the twist process. Can do.
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 twist part and hydraulic drive part which were included in the crankshaft manufacturing apparatus of FIG. 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. 4 from the B direction. It is drawing which looked at the crankshaft manufacturing apparatus of FIG. 4 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. 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. 3 is a flowchart illustrating a method for manufacturing a crankshaft according to an embodiment of the present invention.

  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 illustrating a crankshaft manufacturing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of operations of a twist unit and a hydraulic drive unit included in the crankshaft manufacturing apparatus of FIG. is there.

  Referring to FIGS. 1 and 2, the crankshaft manufacturing apparatus 100 may include a twist unit 120 and a hydraulic drive unit 140. According to the embodiment, the crankshaft manufacturing apparatus 100 may further include a power supply unit 160, a shape correction unit 170, a control unit 180, and a molding unit 190.

  The power supply unit 160 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 120 twists the crankshaft original OCR inside the first rotating mold 125 and the second rotating mold 127 based on rotating the first rotating mold 125 and the second rotating mold 127 alternately. Can do.

  The twist unit 120 may include a first jig (jig) 124 and a second jig 126. According to the embodiment, the twist unit 120 may further include a third jig 122.

  The first jig 124 may be coupled with the first rotating mold 125, the second jig 126 may be coupled with the second rotating mold 127, and the third jig 122 may be coupled with the crank fixing mold 123. May be combined.

  Here, the crank fixing mold 123 can fix the crankshaft original OCR inside a predetermined fixing frame based on the fixing force FF, and the first rotating mold 125 and the second rotating mold 127 have the rotational force. The crankshaft original shape OCR fixed based on SF1 and SF2 can be twisted.

  The crank fixing mold 123 can fix the crankshaft original OCR inside a predetermined fixed mold based on the fixing force FF. For this reason, the third jig 122 may be connected to the first slide, and the first actuator can supply the fixing force FF to the crank fixing mold 123 via the first slide.

  The first rotating mold 125 may be disposed at one end of the crank fixed mold 123. Therefore, the first rotating mold 125 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 127 can be connected to the other end of the crank fixing mold 123. Accordingly, the second rotating mold 127 rotates 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. Can do.

  The first rotating mold 125 can be rotated by the first jig 124. The first jig 124 may have a ring shape centered on the first rotation axis, and may surround the first rotation mold 125. Similarly, the second rotating mold 127 can be rotated by the second jig 126. The second jig 126 may have a ring shape centered on the second rotation axis, and may surround the second rotation mold 127.

  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 supplied to the first rotary die 125 and the second rotary die 127 via separate members, respectively. Could have been For example, the power supply unit 160 may further include a first slide arm and a second slide arm.

  Here, the first slide arm may be connected between the first jig 124 and the second slide, and the second slide arm is connected between the second jig 126 and the second slide. Also good. Accordingly, the first rotational force SF1 is transmitted to the first jig 124 and the first rotary mold 125 via the second slide and the first slide arm, and the second rotational force SF2 is transmitted to the second slide and the second slide. It can be transmitted to the second jig 126 and the second rotating mold 127 via the arm.

  The first slide arm may form a second hinge and a first hinge joint structure, and the first slide arm may form a first jig 124 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 126 and the fourth hinge joint structure. Accordingly, the first rotational force SF1 is transmitted to the first rotating mold 125 based on the first and second hinge joint structures, and the second rotational force SF2 is transmitted to the second rotating gold based on the second and third hinge joint structures. It can be transmitted to the mold 127.

  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 125 can rotate in the first direction S1 about the first rotation axis, and the second rotating mold 127 can be substantially parallel or identical to the first rotation axis. It can rotate in the second direction S2 around the two rotation axes. As a result, the first rotating mold 125 and the second rotating mold 127 can rotate alternately, and the crankshaft original OCR can be twisted.

  The first jig 124 may include a first upper jig 124-1 and a first lower jig 124-2, and the second jig 126 may be a second upper jig 126-1 and a second lower jig. 126-2 may be included, and the third jig 122 may include a third upper jig 122-1 and a third lower jig 122-2.

  The first rotating mold 125 may include a first upper rotating mold 125-1 and a first lower rotating mold 125-2, and the second rotating mold 127 includes a second upper rotating mold 127-1 and The second lower rotary mold 127-2 may be included, and the crank fixed mold 123 may include an upper crank fixed mold 123-1 and a lower crank fixed mold 123-2.

  The first upper jig 124-1 can be coupled to the first lower jig 124-2 by being lowered, and the second upper jig 126-1 can be coupled to the second lower jig 126-2 by being lowered. The third upper jig 122-1 can be coupled to the third lower jig 122-2 by being lowered.

  As a result, the first upper rotating mold 125-1 can be coupled to the first lower rotating mold 125-2, and the second upper rotating mold 127-1 can be coupled to the second lower rotating mold 127-2. The upper crank fixing mold 123-1 can be combined with the lower crank fixing mold 123-2.

  When the first upper jig 124-1 is coupled to the first lower jig 124-2, the first upper jig 124-1 can rotate together with the first lower jig 124-2 by a predetermined first angle in the first direction S <b> 1. Therefore, the first upper rotating mold 125-1 and the first lower rotating mold 125-2 can also rotate about the predetermined first angle in the first direction S1.

  Similarly, when the second upper jig 126-1 is coupled to the second lower jig 126-2, the second upper jig 126-1 can rotate together with the second lower jig 126-2 by a predetermined second angle in the second direction S2. . Therefore, the second upper rotating mold 127-1 and the second lower rotating mold 127-2 can also rotate by a predetermined second angle in the second direction S <b> 2. Here, the first angle and the second angle may be substantially the same.

  As a result, the first rotating mold 125 and the second rotating mold 127 can rotate alternately, and the crankshaft original OCR inside the first rotating mold 125 and the second rotating mold 127 can be twisted.

  The first upper jig 124-1 can be separated from the first lower jig 124-2 when the first upper jig 124-1 rotates together with the first lower jig 124-2 by a predetermined angle. Also, the second upper jig 126-1 can be separated from the second lower jig 126-2 when the second upper jig 126-1 rotates together with the second lower jig 126-2 by a predetermined angle.

  When the first upper jig 124-1 is separated from the first lower jig 124-2, the first upper jig 124-1 is set to the first distance already set from the first lower jig 124-2. Can rise. Similarly, when the second upper jig 126-1 is separated from the second lower jig 126-2, the second upper jig 126-1 has already been set from the second lower jig 126-2. The distance can rise. Here, the first distance and the third distance may be substantially the same.

  When the first upper jig 124-1 is lifted from the first lower jig 124-2 by a first distance, the first upper jig 124-1 has a direction substantially opposite to the first direction S1 (that is, The second direction S2) can be rotated by a predetermined first angle. As a result, the first upper jig 124-1 can return to the initial position. Similarly, when the second upper jig 126-1 is lifted by the third distance, it can rotate by a predetermined second angle in a direction substantially opposite to the second direction S2 (that is, the first direction S1). . As a result, the second upper jig 126-1 can return to the initial position.

  The first lower jig 124-2 is substantially opposite to the first direction S1 when the first upper jig 124-1 is raised from the first lower jig 124-2 by the second distance already set. Can be rotated by a predetermined first angle in the direction (ie, the second direction S2). As a result, the first lower jig 124-2 can be returned to the initial position. Similarly, the second lower jig 126-2 is substantially the same as the second direction S2 when the second upper jig 126-1 rises from the second lower jig 126-2 by the fourth distance already set. Therefore, it can rotate about the predetermined second angle in the opposite direction (that is, the first direction S1). Here, the second distance and the fourth distance may be substantially the same. As a result, the second lower jig 126-2 can return to the initial position.

  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 125 and the second rotating mold 127 of the twist unit 120 can rotate after the crank fixing mold 123 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 second slide moves to supply the rotational forces SF1, SF2.

  The hydraulic drive unit 140 can return the first lower jig 124-2 and the second lower jig 126-2 to the initial positions. That is, when the first upper jig 124-1 is lifted from the first lower jig 124-2 by the second distance already set, the hydraulic drive unit 140 moves the first lower jig 124-2 to the first. A predetermined first angle can be rotated in a direction substantially opposite to the direction S1 (that is, the second direction S2). Similarly, when the second upper jig 126-1 is lifted from the second lower jig 126-2 by a preset fourth distance, the hydraulic drive unit 140 moves the second lower jig 126-2 to the second lower jig 126-2. It can be rotated by a predetermined second angle in a direction substantially opposite to the two directions S2 (that is, the first direction S1).

  According to the embodiment, the hydraulic driving unit 140 may operate in a low hydraulic driving method. For example, the hydraulic drive unit 140 can operate in a low hydraulic drive system using a high pressure cylinder.

  The shape correction unit 170 can correct the shape error generated in the twisted crankshaft original TCR based on the correction force CF. In other words, the shape correcting unit 170 is supplied with the twisted crankshaft original TCR immediately after the twisting process, and the shape generated in the crankshaft original 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 170 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 120 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 can affect the moving distance of the correction mold included in the crank fixed mold 122, the first rotating mold 124, the second rotating mold 126, and the shape correcting unit 170. . 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 hydraulic drive unit 140 returns the first lower jig 124-2 and the second lower jig 126-2, the cost is relatively small and the operation can be performed. Expert knowledge is not required for repair.

  Furthermore, 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 processes can be corrected without a separate configuration. . In the crankshaft manufacturing apparatus according to the embodiment of the present invention, since the twist unit 120 and the shape correction unit 170 are separately supplied with power from the power supply unit 160, the correction process can be performed independently without the twist process. it can.

  FIG. 3 is a drawing showing an example of the crankshaft manufacturing apparatus of FIG. 1, and FIG. 4 is an enlarged view of portion A of the crankshaft manufacturing apparatus of FIG. 5 is a view of the crankshaft manufacturing apparatus of FIG. 4 as viewed from the B direction, and FIG. 6 is a view of the crankshaft manufacturing apparatus of FIG. 4 as viewed from the C direction.

  3 to 6, the crankshaft manufacturing apparatus 200 may include a twist unit 220, a shape correction unit 270, and a hydraulic drive unit. According to the embodiment, the crankshaft manufacturing apparatus 200 may further include a power supply unit, a control unit, and a molding unit.

  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 through the first slides 262-1 and 262-2, the second actuator can supply the rotational force through the second slide 264, The three actuators can supply the correction force via the third slides 267-1 and 267-2.

  The first actuator may include first cylinders 261-1 and 261-2, the second actuator may include second cylinder 263, and the third actuator may include third cylinders 266-1 and 266-2. . Here, the first cylinders 261-1 and 261-2 may be connected to the first slides 262-1 and 262-2, the second cylinder 263 may be connected to the second slide 264, and the third cylinder. 266-1 and 266-2 may be connected to the third slides 267-1 and 267-2. Therefore, the motive power generated by the first to third cylinders 261-1, 261-2, 263, 266-1, 266-2 is used as the first to third slides 262-1, 262-2, 264, 267-. 1 and 267-2, 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 220 can twist the crankshaft original shape inside the first rotating mold and the second rotating mold based on alternately rotating the first rotating mold and the second rotating mold.

  The twist unit 220 may include a first jig, a second jig, and a third jig. The first jig may be coupled with the first rotating mold, the second jig may be coupled with the second rotating mold, and the third jig may be coupled with the crank fixing mold.

  Here, the crank fixing mold can fix the crankshaft original shape inside a predetermined fixing 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 is connected to the first slides 262-1 and 262-2, and the first actuator supplies a fixing force to the crank fixing mold through the first slides 262-1 and 262-2. can do.

  The first rotating mold may be disposed at 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 disposed at 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 264 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 265-1 and a second slide arm 265-2.

  Here, the first slide arm 265-1 may be connected between the first jig and the second slide 264, and the second slide arm 265-2 includes the second jig and the second slide 264. It may be connected between. Accordingly, the first rotational force may be transmitted to the first jig and the first rotary mold via the second slide 264 and the first slide arm 265-1, and the second rotational force is transmitted to the second slide 264. And it may be transmitted to the second jig and the second rotating mold via the second slide arm 265-2.

  The first slide arm 265-1 can form a first hinge joint structure with the second slide 264, and the first slide arm 265-1 can form a first jig and a second hinge joint structure. it can. On the other hand, the second slide arm 265-2 can form a third hinge joint structure with the second slide 264, and the second slide arm 265-2 forms a fourth jig joint structure with the second jig. 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 rotating shaft, and the second rotating mold can be a second rotating shaft that is substantially parallel to or identical to the first rotating shaft. And can be rotated in the second direction. 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 220 will be described in detail with reference to FIGS. 7 to 18 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 mold and the second rotating mold of the twist unit 220 can rotate after the crank fixing mold fixes the crankshaft original shape.

  For this reason, the second slide 264 can be disposed inside the first slides 262-1 and 262-2. In this case, the second slide 264 may be moved together with the first slides 262-1 and 262-2, and when the supply of the fixing force is completed by the movement of the first slides 262-1 and 262-2, the second slide 264 is moved. As the H.264 moves, rotational force can be supplied.

  The hydraulic drive unit can return the first lower jig 224-2 included in the first jig and the second lower jig 226-2 included in the second jig to the initial positions. The operation of the hydraulic drive will also be described in detail with reference to FIGS.

  The shape correction unit 270 can correct the shape error generated in the twisted crankshaft original shape based on the correction force. In other words, the shape correction unit 270 is supplied with the twisted crankshaft original shape immediately after the twisting process, and is twisted based on the correction force supplied through the third slides 267-1 and 267-2. The crankshaft can be completed by correcting the shape error generated in the original shape.

  The shape correction unit 270 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 220 can be corrected inside the correction mold.

  The control unit can control the movement distances of the first slides 262-1 and 262-2, the second slide 264, and the third slides 267-1 and 267-2, respectively. For example, the control unit causes the first to third slides 262-1 and 262-2 so that the moving distances of the first slides 262-1 and 262-2 are different from the moving distances of the third slides 267-1 and 267-2. A control signal for controlling the moving distance of -2, 264, 267-1, 267-2 can be generated.

  The movement distances of the first to third slides 262-1, 262-2, 264, 267-1, and 267-2 are as follows: a crank fixing mold, a first rotating mold, a second rotating mold, and a shape correcting unit 270. 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 262-1, 262-2, 264, 267-1, and 267-2. May receive. Therefore, the control unit controls the moving distance of each of the first to third slides 262-1, 262-2, 264, 267-1, and 267-2 to thereby increase the height between the mold and the cradle. The height difference between the twist process and the correction process can be corrected.

  7 to 18 are views showing the operation of the twist portion included in the crankshaft manufacturing apparatus of FIG.

  Referring to FIGS. 7 to 18, the twist part may include first jigs 224-1 and 224-2, second jigs 226-1 and 226-2, and a third jig. The first rotating mold is coupled to the first jigs 224-1 and 224-2, the second rotating mold is coupled to the second jigs 226-1 and 226-2, and the crank fixing mold is the third jig. Can be coupled to the tool.

  The first jigs 224-1 and 224-2 may include a first upper jig 224-1 and a first lower jig 224-2, and the second jigs 226-1 and 226-2 are the second jigs 226-1 and 226-2. The upper jig 226-1 and the second lower jig 226-2 may be included, and the third jig may include the third upper jig and the third lower jig.

  The first rotating mold may include a first upper rotating mold and a first lower rotating mold, and the second rotating mold may include a second upper rotating mold and a second lower rotating mold, The crank fixed mold may include an upper crank fixed mold and a lower crank fixed 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 224-1, 224-2, second The jigs 266-1 and 226-2 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 224-1 and 224-2, the second jigs 226-1 and 226-2, and the third jig.

  The first slide arm 265-1 may be connected to the first upper jig 224-1, and the second slide arm 265-2 may be connected to the second upper jig 266-1.

  Referring to FIGS. 7 and 13, after the original crankshaft is placed on the first lower rotating mold, the first slides 262-1 and 262-2 of FIG. 5 may be lowered. As a result, the first upper jig 224-1 and the first upper rotating mold can be lowered, and the second upper jig 226-1 and the second upper rotating mold coupled thereto can be lowered.

  8 and 14, the first upper jig 224-1 is lowered to be connected to the first lower jig 224-2, and the second upper jig 226-1 is lowered to be the second lower jig. It can be connected to the jig 226-2.

  As a result, the first upper rotating mold can be coupled with the first lower rotating mold, and the second upper rotating mold can be coupled with the second lower rotating mold. 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 264 of FIG. 4 can be lowered. Accordingly, the first slide arm 265-1 and the second slide arm 265-2 connected to the second slide 264 can also descend.

  Referring to FIGS. 9 and 15, when the first upper jig 224-1 is coupled to the first lower jig 224-2, the first upper jig 224-1 and the first lower jig 224-2 together with the first lower jig 224-2 have a predetermined first angle in the first direction. Can rotate. Therefore, the first upper rotating mold and the first lower rotating mold can also rotate about the predetermined first angle in the first direction.

  Similarly, when the second upper jig 226-1 is coupled to the second lower jig 226-2, the second upper jig 226-1 can rotate with the second lower jig 226-2 in the second direction by a predetermined second angle. Therefore, the second upper rotating mold and the second lower rotating mold can also rotate about the predetermined second angle in the second direction. Here, the first angle and the second angle may be substantially the same.

  For example, the first jigs 224-1 and 224-2 can rotate clockwise as the first slide arm 265-1 descends. Similarly, the second jigs 226-1 and 226-2 can rotate counterclockwise at the same time when the second slide arm 265-2 is lowered.

  Since the first rotating mold rotates together with the first jigs 224-1 and 224-2, 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 266-1 and 226-2, the other crankshaft original shape surrounded by the second rotating mold can rotate counterclockwise.

  As a result, the first rotating mold and the second rotating mold can rotate alternately, and the crankshaft original shape inside the first rotating mold and the second rotating mold can be twisted.

  Referring to FIGS. 10 and 16, the first upper jig 224-1 has a first lower jig 224-1 when the first upper jig 224-1 rotates together with the first lower jig 224-2 by a predetermined angle. Can be separated from 224-2. Also, the second upper jig 226-1 can be separated from the second lower jig 226-2 when the second upper jig 226-1 rotates together with the second lower jig 226-2 by a predetermined angle. .

  When the first upper jig 224-1 is separated from the first lower jig 224-2, the first upper jig 224-1 rises by the first distance already set from the first lower jig 224-2. Can do. Similarly, when the second upper jig 226-1 is separated from the second lower jig 226-2, the second upper jig 226-1 is already set from the second lower jig 226-2. The distance can rise. Here, the first distance and the third distance may be substantially the same.

  Referring to FIGS. 11 and 17, the first upper jig 224-1 moves in the first direction when the first upper jig 224-1 rises from the first lower jig 224-2 by a first distance. It can rotate about a predetermined first angle in a substantially opposite direction (ie, the second direction). As a result, the first upper jig 224-1 can be returned to the initial position. Similarly, when the second upper jig 226-1 is raised by the third distance, it can rotate by a predetermined second angle in a direction substantially opposite to the second direction (that is, the first direction). As a result, the second upper jig 226-1 can return to the initial position.

  Referring to FIGS. 12 and 18, when the first lower jig 224-2 is lifted from the first lower jig 224-2 by a predetermined second distance, It can rotate about a predetermined first angle in a direction substantially opposite to the first direction (that is, the second direction). As a result, the first lower jig 224-2 can be returned to the initial position. Similarly, the second lower jig 226-2 is substantially the same as the second direction when the second upper jig 226-1 is raised from the second lower jig 226-2 by the fourth distance already set. It can be rotated by a predetermined second angle in the opposite direction (that is, the first direction). Here, the second distance and the fourth distance may be substantially the same. As a result, the second lower jig 226-2 can return to the initial position.

  Here, when the first upper jig 224-1 rises from the first lower jig 224-2 by the second distance that has already been set, the hydraulic drive unit moves the first lower jig 224-2 to the first. A predetermined first angle can be rotated in a direction substantially opposite to the direction (that is, the second direction). For example, the hydraulic drive unit can return the first lower jig 224-2 to the initial position based on the first gear 242 that can rotate the first lower jig 224-2.

  Similarly, the hydraulic drive unit moves the second lower jig 226-2 to the second lower jig 226-2 when the second upper jig 226-1 has risen from the second lower jig 226-2 by the fourth distance already set. A predetermined second angle can be rotated in a direction substantially opposite to the direction (that is, the first direction). For example, the hydraulic drive unit can return the second lower jig 226-2 to the initial position based on the second gear 244 that can rotate the second lower jig 226-2.

  According to the embodiment, the hydraulic drive unit can operate in a low hydraulic drive system. For example, the hydraulic drive unit can operate in a low hydraulic drive system using a high pressure cylinder.

  FIG. 19 is a flowchart illustrating a crankshaft manufacturing method according to an embodiment of the present invention.

  Referring to FIG. 19, in manufacturing the crankshaft, the crankshaft original shape is twisted based on alternately rotating the first rotating die and the second rotating die (S 120), and the twisted crankshaft original shape is converted into the twisted crankshaft original shape. The generated shape error can be corrected (S140).

  Further, when the crankshaft original shape is twisted (S120), the upper jig is lowered to be coupled with the lower jig (S121), and the upper jig is rotated together with the lower jig in one direction by a predetermined angle (S120). S122), the upper jig can be separated from the lower jig (S123). Further, the upper jig is raised by the first distance already set from the lower jig (S124), and can be returned by rotating the upper jig by a predetermined angle in a different direction (S125). The jig can be returned by rotating it by a predetermined angle in a different direction (S126).

  The crankshaft original shape may be twisted based on alternately rotating the first rotating die and the second rotating die (S120). The first rotating mold may be coupled to the first jig, and the second rotating mold may be coupled to the second jig. The original crankshaft inside the first rotating mold and the second rotating mold can be twisted by the first rotating mold and the second rotating mold that rotate as the first jig and the second jig rotate.

  The upper jig can be coupled to the lower jig by lowering (S121). The first jig and the second jig may include an upper jig and a lower jig, respectively. For example, the first jig may include a first upper jig and a first lower jig, and the second jig may include a second upper jig and a second lower jig. At this time, the first upper jig can be coupled to the first lower jig by lowering, and the second upper jig can be coupled to the second lower jig by lowering.

  The upper jig can rotate together with the lower jig in one direction by a predetermined angle (S122). For example, the upper jig can rotate by a predetermined angle in one direction when the upper jig is coupled to the lower jig. At this time, the lower jig combined with the upper jig can also rotate together with the upper jig by a predetermined angle in one direction.

  The upper jig can be separated from the lower jig (S123). For example, the upper jig can be separated from the lower jig when the upper jig rotates together with the lower jig by a predetermined angle.

  The upper jig can be raised from the lower jig by the first set distance (S124). For example, when the upper jig is separated from the lower jig, the upper jig can rise by the first distance already set from the lower jig.

  The upper jig can be returned by rotating it by a predetermined angle in a different direction (S125). For example, the upper jig can rotate by a predetermined angle in a different direction opposite to one direction when the upper jig rises by a first distance already set from the lower jig.

  The lower jig can be returned by rotating it by a predetermined angle in a different direction (S126). For example, the lower jig can rotate by a predetermined angle in a direction opposite to one direction when the upper jig rises by a second distance already set from the lower jig.

  At this time, the lower jig can rotate by a predetermined angle in different directions depending on the hydraulic drive unit. According to the embodiment, the hydraulic drive unit can operate in a low hydraulic drive system. For example, the hydraulic drive unit can operate in a low hydraulic drive system using a high pressure cylinder.

  In the crankshaft manufacturing method according to the embodiment of the present invention, since the hydraulic drive unit returns the lower jig, the cost is relatively small, and expert knowledge is not required for operation or repair.

  As mentioned above, although the crankshaft manufacturing apparatus and the crankshaft manufacturing method by embodiment of this invention were demonstrated with reference to drawings, the said description is the said technical field in the range which does not deviate from the technical idea of this invention as an illustration. Could be modified and changed by those with ordinary knowledge in

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, 220 Twist unit 140 Hydraulic drive unit 160 Power supply unit 170, 270 Shape correction unit 180 Control unit 190 Molding unit

Claims (9)

A hydraulic drive,
The first and second rotating molds include first and second jigs to which the first and second rotating molds are coupled, respectively, and the first and second rotating molds are rotated based on alternately rotating the first and second rotating molds. A twist part for twisting the crankshaft original shape of
A power supply unit having a second actuator for supplying a rotational force via the second slide;
Including
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;
Further includes
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 second slide arm forms a second hinge joint structure with the second slide, forms a second hinge joint structure with the second jig,
Each of the first and second jigs is
A lower jig,
Combined with the lower jig, rotated by a predetermined angle in the coupled state, separated from the lower jig in the rotated state, and then separated from the lower jig and raised by the first distance already set. And an upper jig that rotates back in the reverse direction of the rotation after being raised by the first distance,
Including
The hydraulic drive unit is configured to return the lower jig by rotating the lower jig in the reverse direction when the upper jig is lifted from the lower jig by a predetermined second distance. Shaft manufacturing equipment. The power supply unit further first actuator for supplying fixing force via the first slide, the 及 beauty straightening force via a third sliding saw including a third actuator for supplying,
A shape correction unit that corrects a shape error generated in the original shape of the crankshaft twisted by the twist unit 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;
Further including
The twist portion further includes a third jig to which a crank fixing die for fixing the crankshaft original shape inside based on the fixing force is coupled.
The first rotating die is disposed at one end of the crank fixing die, and rotates one of the fixed crankshaft original shapes around a rotating shaft in a first direction 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 arranged in the first direction opposite to the first direction around the rotating shaft based on the rotational force. The crankshaft manufacturing apparatus according to claim 1, wherein the crankshaft manufacturing apparatus rotates in two directions. 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 2, wherein the third actuator includes a third cylinder connected to the third slide. The first jig and the second jig, crankshaft manufacturing apparatus according to claim 3, wherein the benzalkonium which have a ring shape around the rotation axis. The second actuator supplies the rotational force after the first actuator supplies the fixing force,
The crankshaft manufacturing apparatus according to claim 2, wherein the first rotating mold and the second rotating mold rotate after the crank fixing mold fixes the crankshaft original shape.   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;
A molding mold into which the heated constituent material is injected;
The crankshaft manufacturing apparatus according to claim 6 , comprising: A crankshaft manufacturing method using the crankshaft manufacturing apparatus according to claim 1,
Twisting the crankshaft prototype inside the first and second rotating molds based on alternately rotating the first and second rotating molds to which the first and second jigs are respectively coupled;
Correcting a shape error generated in the twisted crankshaft original shape;
Including
The step of twisting the crankshaft original shape includes:
An upper jig and a lower jig included in the first and second jigs, respectively,
The upper jig is rotated by a predetermined angle in a state where the upper jig and the lower jig are coupled; and
The upper jig is separated from the lower jig in a rotated state;
After being separated, the upper jig rises from the lower jig by a first distance already set;
The upper jig is rotated back in the reverse direction of the rotation after being raised by the first distance; and
When the upper jig is lifted from the lower jig by the second distance already set, the lower jig rotates in the reverse direction and returns;
Only including,
Crankshaft manufacturing method. The lower jig is characterized by rotating by the hydraulic drive unit to the different direction as the predetermined angle, the crank shaft manufacturing method according to claim 8.

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