JP6687443B2 - Manufacturing equipment for automobile wheel rims - Google Patents

Description

  The present invention relates to an automobile wheel rim manufacturing apparatus.

  Conventionally, there is known an automobile wheel rim manufacturing device for roll forming using both a top roll having an annular rim work arranged on the outer peripheral side of the rim work and a bottom roll arranged on the inner peripheral side of the rim work ( See, for example, Patent Document 1.

  The device described in this document rotates a bottom roll mounting shaft for mounting a bottom roll, a bottom roll driving mechanism for rotationally driving the bottom roll mounting shaft, a top roll mounting shaft for mounting a top roll, and a top roll mounting shaft. A top roll driving mechanism and an adjusting mechanism for adjusting the distance between the bottom roll mounting shaft and the top roll mounting shaft are provided.

  When roll-forming a rim work using this type of apparatus, it is necessary to set the rim work on the bottom roll attached to the bottom roll attachment shaft in the preparation stage. In order to facilitate this work, the apparatus described in the above document is provided with a work supply mechanism that moves the mounting portion on which the rim work is mounted from the retracted position to the set position for setting the rim work on the bottom roll. Has been.

  By the way, in the apparatus described in the above document, after performing roll forming of a certain rim work, when performing roll forming of a rim work having a different shape (in particular, outer diameter) from the rim work, in addition to the bottom roll and the top roll, Furthermore, it is necessary to replace the mounting portion of the work supply mechanism. This is due to the following reasons.

  That is, with the device described in the above document, the vertical position of the mounting portion at the set position cannot be adjusted. Therefore, when rim works having different outer diameters are mounted on the mounting portion at the set position, the vertical position of the central axis of the rim work changes. For this reason, the vertical position of the center axis of the rim work with respect to the bottom roll mounting shaft is displaced from the optimum position, which makes it difficult to set the rim work on the bottom roll. To solve this problem, when rim works with different outer diameters are placed on the placement part at the set position, the shape of the placement part must be adjusted so that the vertical position of the center axis of the rim work does not change. Need to be changed. That is, it was necessary to replace the mounting portion.

  From the above, in the apparatus described in the above document, it is necessary to replace the mounting portion of the work supply mechanism each time the shape (especially, outer diameter) of the rim work used for roll forming changes. For this reason, it takes time to replace the mounting portion, and it is also necessary to prepare a plurality of types of mounting portions. As a result, there is a problem that the manufacturing cost of the wheel rim becomes high.

  The present invention has been made to address the above problem, and an object thereof is to replace the mounting portion of the work supply mechanism even if the shape (especially, outer diameter) of the rim work used for roll forming changes. It is an object of the present invention to provide a manufacturing apparatus for a wheel rim for an automobile, which does not have any.

JP, 2008-279468, A

  An apparatus for manufacturing an automobile wheel rim according to the present invention includes a bottom roll mounting shaft, a bottom roll driving mechanism, a top roll mounting shaft, a top roll driving mechanism, as in the device described in the above document (first). An adjusting mechanism and a work supply mechanism are provided.

  A feature of the automobile wheel rim manufacturing apparatus according to the present invention is that the work supply mechanism includes a base body and a moving portion that is supported so as to be movable relative to the base body and has a mounting portion on which the rim work is mounted. A second adjusting mechanism capable of moving the placing part between the retracted position and the setting position by adjusting the position of the moving body with respect to the body and the base; And a third adjusting mechanism for adjusting the position of the base body with respect to the shaft.

  According to this, by using the third adjusting mechanism to adjust the vertical position of the "base body" with respect to the bottom roll mounting shaft, the vertical position of the "mounting portion in the set position" with respect to the bottom roll mounting shaft is adjusted. Can be adjusted. Therefore, when the rim works having different outer diameters are placed on the placing part in the set position, the placement is performed by using the third adjusting mechanism so that the vertical position of the central axis of the rim works does not change. The vertical position of the part can be adjusted. As a result, even if the shape (especially the outer diameter) of the rim work used for roll forming is changed, it is not necessary to replace the mounting portion.

  In the manufacturing apparatus according to the above aspect of the invention, the work supply mechanism adjusts the position of the moving body with respect to the base body so that the placing portion is positioned obliquely above the retracted position from the retracted position. It is preferable to be configured so as to linearly move toward the set position.

  For example, when a configuration is adopted in which the mounting portion moves linearly in the horizontal direction from the retracted position to the set position, the rim work mounted on the mounting portion easily falls from the mounting portion. On the other hand, according to the above configuration, the mounting unit linearly moves obliquely upward from the retracted position to the set position. Therefore, during the movement of the mounting portion, an inertial force including a component of a force (downward force) in a direction of pressing the rim work on the mounting portion may act on the rim work mounted on the mounting portion. As a result, the rim work placed on the placing section is less likely to drop from the placing section than when the placing section moves linearly in the horizontal direction from the retracted position to the set position.

  The above-mentioned configuration is arranged above the bottom roll mounting shaft, and a guide roll mounting shaft for mounting a guide roll for pressing the rim work set on the bottom roll from the outer peripheral side of the rim work, and the guide roll. It is more preferable in the case of including a pressing mechanism that presses the guide roll attached to the attachment shaft against the rim work.

  For example, when a configuration is adopted in which the mounting part moves linearly in the horizontal direction from the retracted position to the set position, the rim work mounted on the mounting part interferes with the guide roll during the movement of the mounting part. Easy to do. On the other hand, in the above configuration, the mounting portion linearly moves obliquely upward from the retracted position to the set position, so that the rim work mounted on the mounting portion hardly interferes with the guide roll.

  The manufacturing apparatus according to the present invention includes a fourth adjusting mechanism that adjusts the position of the base body with respect to the bottom roll mounting shaft in the axial direction of the bottom roll mounting shaft, and the fourth adjusting mechanism includes the bottom roll mounting shaft. It is preferable that the base body is configured to be movable outside the range where the bottom roll mounting shaft exists in the axial direction of the shaft.

  The bottom roll mounting shaft is composed of a pair of bottom roll mounting shafts that are coaxially arranged apart from each other in the axial direction of the bottom roll mounting shaft, and each bottom roll mounting shaft is the bottom roll mounting shaft. Corresponding divided rolls are attached to the two divided rolls that make up the pair of bottom rolls and are attached to the pair of bottom roll attachment shafts by adjusting the distance between the pair of bottom roll attachment shafts in the axial direction. A combined state in which the two divided rolls are combined to form the bottom roll, and a separated state in which the two divided rolls attached to the pair of bottom roll attachment shafts are separated from each other in the axial direction. When a fifth adjusting mechanism that is selectively realized is provided, the fourth adjusting mechanism may be configured such that the fourth adjusting mechanism is arranged in the axial direction of the bottom roll mounting shaft. It is preferable that the base body is configured to be movable out of the range of existence of the pair of bottom roll mounting shafts in the coupled state.

  According to this, the base body (therefore, the entire work supply mechanism) can be moved to the outside of the existence range of the bottom roll mounting shaft (the pair of bottom roll mounting shafts in the coupled state). Therefore, for example, when exchanging the bottom roll and the top roll, the exchanging work is facilitated by moving the work supply mechanism out of the range where the bottom roll mounting shaft exists.

FIG. 1 is a front view schematically showing a schematic configuration of an embodiment of an automobile wheel rim manufacturing apparatus according to the present invention. FIG. 2 is a right side view of the embodiment shown in FIG. 3 is a view taken along arrow 3-3 shown in FIG. 2, FIG. 3 (a) is a first view showing how the position of the base body 51 in the axial direction is adjusted, and FIG. 3 (b) is FIG. 5 is a second diagram showing the manner of adjusting the position of the base body 51 in the axial direction. FIG. 4 is a first diagram corresponding to FIG. 1 showing a state of adjusting the position of the base body 62 in the axial direction. FIG. 5 is a second diagram corresponding to FIG. 1 showing how the axial position of the base body 62 is adjusted. FIG. 6 is a first diagram corresponding to FIG. 2 showing how the vertical position of the base body 62 is adjusted. FIG. 7 is a second diagram corresponding to FIG. 2 showing how the vertical position of the base body 62 is adjusted. FIG. 8 is a first diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 9 is a second diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 10 is a third diagram corresponding to FIG. 1 showing a procedure for roll-forming the rim work W. FIG. 11 is a fourth diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 12 is a fifth diagram corresponding to FIG. 1 showing a procedure for roll-forming the rim work W. FIG. 13 is a sixth diagram corresponding to FIG. 1 and showing a procedure for roll-forming the rim work W. FIG. 14 is a seventh diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 15 is an eighth diagram corresponding to FIG. 1 showing a procedure for roll-forming the rim work W. FIG. 16 is a ninth diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 17 is a tenth view corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 18 is an eleventh view corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 19 is a twelfth view corresponding to FIG. 1 and showing a procedure for roll-forming the rim work W. FIG. 20 is a thirteenth diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W. FIG. 21 is a fourteenth diagram corresponding to FIG. 2 showing a procedure for roll-forming the rim work W.

  Hereinafter, an embodiment of an automobile wheel rim manufacturing apparatus according to the present invention (hereinafter, referred to as “this apparatus”) will be described with reference to the drawings. In the drawings, the axial direction (horizontal direction) corresponds to the x-axis direction, the horizontal direction orthogonal to the axial direction corresponds to the y-axis direction, and the vertical direction corresponds to the z-axis direction.

(Constitution)
As shown in FIGS. 1 and 2, this embodiment includes a metal frame 10. The outer contour of the frame 10 is a lower frame 11 that is placed on a floor surface (a placement surface or a horizontal surface) and that extends horizontally, and a side portion that is integrally provided with the lower frame 11 and that extends vertically. The frame 12 and an upper frame 13 that is provided integrally with the side frame 12 and that extends in the horizontal direction are configured.

  As shown in FIG. 1, the pair of side frames 12 located at both ends in the axial direction (x-axis direction) are cantilevered horizontally toward the inside of the frame 10 in the vicinity of an intermediate portion in the vertical direction. A pair of intermediate frames 14 extending in the same direction are integrally provided. The front end surfaces of the pair of intermediate frames 14 are opposed to each other in the axial direction (x-axis direction) with a predetermined gap at the center of the frame 10 in the axial direction (x-axis direction).

  As shown in FIG. 1, on the upper surface of each intermediate frame 14, an adjusting mechanism 23 that supports the motor 21 so as to be relatively movable in the axial direction (x-axis direction) is provided. The motor shaft 22 of each motor 21 extends coaxially in the axial direction toward the center of the frame 10. Each adjusting mechanism 23 uses the driving torque of a motor or the like (not shown) to set the corresponding axial position of the motor 21 to the “first position” (FIG. 1) based on a command from the control device (microcomputer) 100. The positions can be adjusted between the position indicated by the solid line and the "second position" (the position indicated by the chain double-dashed line in FIG. 1).

  As shown in FIG. 1, a corresponding divided roll of the two divided rolls B1 and B2 constituting the bottom roll B is attached to the motor shaft 22 of each motor 21 so as to rotate integrally. When the pair of motors 21 are both in the "second position", the two divided rolls B1 and B2 are in the "separated state" in which they are separated in the axial direction. On the other hand, when the pair of adjusting mechanisms 23 are used to bring the pair of motors 21 closer to each other in the axial direction and move to the "first position" together from the "separated state", the two split rolls B1 and B2 are separated from each other. The bottom roll B is formed by being integrally combined into a “combined state”. The bottom roll B is a cylindrical metal member used for roll forming of the rim work W, and is arranged on the inner peripheral side of the rim work W. The rim work W is a cylindrical metal member used for forming a wheel rim, and is typically formed by welding or the like the end surfaces of metal plate pieces that are rolled into an annular shape.

  The pair of motors 21 controls the rotation speed of the bottom roll B based on a command from the control device (microcomputer) 100. Each motor 21 may be a servomechanical electric motor (servo motor) equipped with an encoder that detects the rotation angle of the motor shaft 22. In this case, the detection result of the encoder is supplied to the control device 100, and the pair of motors 21 are drive-controlled based on a command from the control device 100. Here, the pair of motor shafts 22 correspond to the “bottom roll mounting shaft” of the present invention, the pair of motors 21 correspond to the “bottom roll driving mechanism” of the present invention, and the pair of adjusting mechanisms 23 (shown in the figure). (Including a motor that does not) corresponds to the “fifth adjustment mechanism” of the present invention.

  As shown in FIG. 1, a movable frame 15 is arranged below the upper frame 13. On the upper surface of the movable frame 15, a columnar portion 15a is integrally provided upright toward the upper side. The columnar portion 15a is inserted into a bottomed hole portion 13a that is provided in a protruding portion on the lower surface of the upper frame 13 and opens downward, so that the movable frame 15 moves vertically with respect to the upper frame 13 ( It is supported so as to be relatively movable in the z-axis direction and non-rotatable around the z-axis.

  A servo motor 31 is fixed to the upper surface of the upper frame 13. The motor shaft 32 of the servo motor 31 extends downward and penetrates the upper frame 13 to the inside of the bottomed hole portion 13a. A male screw portion provided integrally with the motor shaft 32 is screwed with a female screw portion formed inside the columnar portion 15a. As a result, when the servo motor 31 rotates the motor shaft 32, the movable frame 15 moves in the vertical direction (z-axis direction).

  The servomotor 31 is a servomechanical electric motor equipped with an encoder that detects the rotation angle of the motor shaft 32. The detection result of the encoder is supplied to the control device 100, and the rotation angle of the servo motor 31 is controlled based on a command from the control device 100, whereby the vertical position (z-axis direction) of the movable frame 15 is adjusted. It has become so.

  As shown in FIG. 1, a motor 41 is fixed to the lower surface of the movable frame 15. The motor shaft 42 of the motor 41 extends in the axial direction (x-axis direction). The motor shaft 42 is provided substantially parallel (or parallel) to the motor shaft 22. A top roll T is attached to the motor shaft 42 so as to rotate integrally therewith. The top roll T is a cylindrical metal member used for roll forming the rim work W, and is arranged on the outer peripheral side of the rim work W. The motor 41 controls the rotation speed of the top roll T based on a command from the control device (microcomputer) 100. Like the motor 21, the motor 41 may be a servomechanical electric motor (servo motor) equipped with an encoder that detects the rotation angle of the motor shaft 42.

  The top roll T attached to the motor shaft 42 is arranged above the bottom roll B attached to the pair of motor shafts 22. Therefore, by controlling the rotation angle of the servo motor 31, the vertical distance (z-axis direction) between the motor shaft 42 (top roll T) and the pair of motor shafts 22 (bottom roll B) can be adjusted. It has become. Here, the motor shaft 42 corresponds to the “top roll mounting shaft” of the present invention, the motor 41 corresponds to the “top roll drive mechanism” of the present invention, and the “servo motor 31, male screw portion of the motor shaft 32, and The “female screw portion of the columnar portion 15a” corresponds to the “first adjusting mechanism” of the present invention.

  As shown in FIG. 2 and FIG. 3 which is a view taken along line 3-3- of FIG. 2, each of the pair of inclined portions 15b formed at both ends of the movable frame 15 in the horizontal direction (y-axis direction). Two parallel guide rails 15c that support the base 51 so as to be relatively movable in the axial direction (x-axis direction) are provided on the lower surface of the.

  As shown in FIG. 3, a servo motor 54 is fixed to the lower surface of each inclined portion 15b. The motor shaft 55 of each servo motor 54 extends in the axial direction (x-axis direction) and penetrates the base body 51. A male screw portion provided integrally with each motor shaft 55 is screwed with a female screw portion formed inside the base body 51.

  Each servomotor 54 is a servomechanical electric motor equipped with an encoder that detects the rotation angle of the corresponding motor shaft 55, like the servomotor 31 described above. Therefore, by controlling the rotation angle of each servo motor 54 based on the command from the control device 100 based on the detection result of the encoder, as shown in FIGS. 3 (a) and 3 (b), each substrate The position of 51 in the axial direction (x-axis direction) is adjusted.

  As shown in FIG. 2, inside each base body 51, a cylinder portion 51 a that is opened obliquely downward toward the presence direction of the bottom roll B is arranged. One end of a rod-shaped moving body 52 is inserted into each cylinder portion 51a, and the moving body 52 can move relative to the base body 51 in the axial direction of the cylinder portion 51a and the axis line of the cylinder portion 51a. It is supported so that it cannot rotate relative to it.

  A rotary shaft 53 extending in the axial direction (x-axis direction) is provided at the other end of each moving body 52 so as to be rotatable around the axis. The rotating shaft 53 is provided substantially parallel (or parallel) to the motor shaft 22. A guide roll G is attached to each rotating shaft 53 so as to rotate integrally. These pair of guide rolls G are rotating members for pressing the rim work W set on the bottom roll B from the outer peripheral side of the rim work in order to stabilize it.

  Each base 51 and the corresponding rotating shaft 53 (guide roll G) move in the axial direction (x-axis direction) integrally. Therefore, by controlling the rotation angle of the pair of servo motors 54, as shown in FIGS. 3A and 3B, the axis line of the pair of rotation shafts 53 (the pair of guide rolls G). The position in the direction (x-axis direction) can be adjusted.

  Further, a so-called "hydraulic cylinder mechanism" is configured by the cylinder portion 51a of each base 51 and the corresponding moving body 52. By adjusting the hydraulic pressure in each cylinder portion 51a based on a command from the control device 100, each rotary shaft 53 (each guide roll G) is in the "withdrawal position" and the guide roll G is the rim work, as will be described later. It is linearly movable between the "pressing position" where W is pressed from the outer peripheral side of the rim work. The “pressing position” is located diagonally below the “retracting position”.

  Further, the pair of bases 51 and the motor shaft 42 arranged on the movable frame 15 move integrally in the vertical direction (z-axis direction). Therefore, by controlling the rotation angle of the servomotor 31, the pair of bases 51 (and therefore the pair of guide rolls G) and the motor shaft 42 (and therefore the top roll T) are integrated together in the vertical direction (z-axis). Direction). Here, the pair of rotating shafts 53 corresponds to the “guide roll mounting shaft” of the present invention, and the pair of “cylinder portion 51a of the base body 51 and moving body 52” corresponds to the “pressing mechanism” of the present invention. .

  As shown in FIGS. 1 and 2, on the upper surface of the lower frame 11, two parallel guide rails 11 a that support the movable table 61 so as to be relatively movable in the axial direction (x-axis direction) are provided. As shown in FIG. 1, a servo motor 68 is fixed to the upper surface of the lower frame 11. The motor shaft 69 of the servo motor 68 extends in the axial direction (x-axis direction) and penetrates the movable base 61. A male screw portion provided integrally with the motor shaft 69 is screwed with a female screw portion formed inside the movable table 61.

  The servomotor 68 is a servomechanical electric motor equipped with an encoder that detects the rotation angle of the motor shaft 69, like the servomotor 31 described above. Therefore, by controlling the rotation angle of the servo motor 68 based on a command from the control device 100 based on the detection result of the encoder, from the “operating position” shown in FIG. 4 to the “original position” shown in FIG. The position of the movable table 61 in the axial direction (x-axis direction) is adjusted.

  As shown in FIGS. 1 and 2, a base 62 is arranged above the movable table 61. A plurality of columnar parts erected on the upper surface of the movable base 61 are respectively inserted into corresponding bottomed holes provided on the lower surface of the base body 62, so that the base body 62 is moved. It is supported so as to be relatively movable in the up-down direction (z-axis direction) with respect to 61, but non-rotatable around the z-axis.

  A servo motor 66 is embedded and fixed on the movable table 61. The motor shaft 67 of the servo motor 66 extends upward to the inside of the base body 62. A male screw portion provided integrally with the motor shaft 67 is screwed with a female screw portion formed inside the base body 62.

  The servomotor 66 is, like the servomotor 31 described above, a servomechanical electric motor equipped with an encoder for detecting the rotation angle of the motor shaft 67. Therefore, by controlling the rotation angle of the servo motor 66 based on a command from the control device 100 based on the detection result of the encoder, as shown in FIGS. 6 and 7, the vertical direction (z-axis direction) of the base 62. The position of is adjusted.

  On the inclined upper surface of the base body 62, a cylinder portion 63 that is opened obliquely upward toward the existence direction of the bottom roll B is integrally arranged. One end of a rod-shaped moving body 64 is inserted in the cylinder portion 63, and the moving body 64 is movable relative to the cylinder portion 63 (hence, the base body 62) in the axial direction of the cylinder portion 63, and Are supported so that they cannot rotate relative to each other around the axis of the cylinder portion 63. A mounting portion 65 for mounting the rim work W is integrally provided on the other end of the moving body 64.

  The base body 62 and the mounting portion 65 integrally move in the axial direction (x-axis direction). Therefore, by controlling the rotation angle of the servo motor 68, the position of the mounting portion 65 in the axial direction (x-axis direction) is adjusted from the "operating position" shown in FIG. 4 to the "home position" shown in FIG. It is supposed to be done. In the “operating position” shown in FIG. 4, the base body 62 (mounting portion 65) is within the existence range of the above-mentioned “gap” between the front end surfaces of the pair of intermediate frames 14 in the axial direction (x-axis direction). Is located in. In the “original position” shown in FIG. 5, the base body 62 (mounting portion 65) is positioned outside the existence range of the pair of motor shafts 22 in the “coupled state” in the axial direction (x-axis direction). There is. In the “original position” shown in FIG. 5, the base body 62 (mounting portion 65) is located outside the range where the motor shaft 42 exists in the axial direction (x-axis direction).

  In addition, the base body 62 and the mounting portion 65 integrally move in the vertical direction (z-axis direction). Therefore, by controlling the rotation angle of the servo motor 66, the position of the mounting portion 65 in the vertical direction (z-axis direction) is adjusted as shown in FIGS. 6 and 7.

  The cylinder portion 63 and the moving body 64 constitute a so-called “air cylinder mechanism”. By adjusting the air pressure in the cylinder portion 63 based on a command from the control device 100, the mounting portion 65 causes the “retracted position” and “for setting the rim work W on the bottom roll B, as described later. It is possible to move linearly between the "set position". The “set position” is located diagonally above the “retracted position”.

  Here, "the movable base 61, the base body 62, the cylinder portion 63, the moving body 64, the mounting portion 65, the servo motor 66, the motor shaft 67, the servo motor 68, and the motor shaft 69" are the "work supply mechanism" of the present invention. , The “base 62 and the cylinder portion 63” corresponds to the “base” of the present invention, the moving body 64 corresponds to the “moving body” of the present invention, and the mounting portion 65 corresponds to the “mounting” of the present invention. The "cylinder portion 63 and the moving body 64" correspond to the "second adjusting mechanism" of the present invention, and the "servo motor 66, the male screw portion of the motor shaft 67, and the female screw portion of the base 62". "Corresponds to the" third adjustment mechanism "of the present invention, and the" servo motor 68, the male screw portion of the motor shaft 69 and the female screw portion of the movable base 61 "correspond to the" fourth adjustment mechanism "of the present invention.

(Roll forming)
Next, a procedure for roll-forming the rim work W using this apparatus will be briefly described with reference to FIGS. 8 to 21. The present apparatus is an apparatus for manufacturing a desired automobile wheel rim by performing roll forming on a rim work W on which a known flare process is performed in advance.

  First, when performing roll forming on the rim work W, the rotation angle of the servo motor 66 is controlled so that the rim work W mounted on the mounting portion 65 at the “set position” (see FIGS. 11 and 12 described later). The vertical direction (z-axis direction) of the base body 62 (hence, the mounting portion 65) is adjusted so that the vertical position of the center axis of the base is the optimum position for the pair of motor shafts 22 (bottom roll B). Adjust the position of in advance. By controlling the rotation angle of the servo motor 68, the position of the base body 62 (and hence the mounting portion 65) in the axial direction (x-axis direction) is adjusted in advance to the “operating position” (see FIG. 10 described later). deep.

  The "air cylinder mechanism" is controlled to maintain the mounting portion 65 at the "retracted position" (see FIG. 8 described later). Further, the pair of “hydraulic cylinder mechanisms” are controlled to maintain the pair of guide rolls G at the “retracted position” (see FIG. 8 described later).

  By using the pair of adjusting mechanisms 23, the positions of the pair of motors 21 in the axial direction (x-axis direction) are both maintained at the “second position” (see FIG. 10 described later). Further, the pair of motors 21 and 41 are controlled so that the rotational speeds of the two divided rolls B1 and B2 match and the peripheral speed of the two divided rolls B1 and B2 is equal to that of the top roll T. Rotational speeds of the pair of motor shafts 22 and 42 so that the rotational speeds of the two split rolls B1 and B2 and the rotational direction of the top roll T are opposite to each other so as to match the peripheral speed. Is controlled to be constant.

  In this state, as shown in FIG. 8, the rim work W is loaded into the loading shooter 16 fixed to the side frame 12. As a result, the rim work W rolls on the loading shooter 16 toward the mounting portion 65 in the “retracted position”, and the rim work W is mounted on the mounting portion 65 as shown in FIGS. 9 and 10.

  Next, as shown in FIGS. 11 and 12, the “air cylinder mechanism” is controlled to move the mounting portion 65 from the “retracted position” to the “set position”. As a result, the rim work W is arranged in the space between the two divided rolls B1 and B2 that are rotating separately.

  Subsequently, as shown in FIG. 13, the pair of adjustment mechanisms 23 are used to move the positions of the pair of motors 21 in the axial direction (x-axis direction) to the “first position”. As a result, the two divided rolls B1 and B2 are integrally combined to form the bottom roll B, and the bottom roll B is arranged on the inner peripheral side of the rim work W. Next, as shown in FIGS. 14 and 15, the “air cylinder mechanism” is controlled to return the mounting portion 65 from the “set position” to the “retracted position”.

  Next, as shown in FIG. 16, the rotation angle of the servo motor 31 is controlled to lower the top roll T and bring it close to the bottom roll B. At this time, the pair of guide rolls G also descend together. At this stage, the top roll T and the pair of guide rolls G are not in contact with the rim work W.

  Next, as shown in FIG. 17, the pair of “hydraulic cylinder mechanisms” are controlled to move the pair of guide rolls G from the “retracted position” to the “pressing position”. As a result, the pair of guide rolls G contacts the rim work W and presses the rim work W from the outer peripheral side of the rim work. This pressing force has a magnitude corresponding to the hydraulic pressure in the "hydraulic cylinder mechanism". At this stage, the top roll T is not in contact with the rim work W.

  Next, as shown in FIGS. 18 and 19, the rotation angle of the servo motor 31 is controlled to further lower the top roll T to bring it into contact with the bottom roll B. At this time, the pair of guide rolls G still continues to press the rim work W. As a result, a state in which the rim work W rotates while the rim work W is sandwiched between the rotating top roll T and bottom roll B is obtained. Since the pair of guide rolls G presses the rim work W, the rim work W can continue to rotate stably.

  In this state, the rotation angle of the servo motor 31 is controlled to adjust the distance between the top roll T and the bottom roll B to be gradually reduced (thus, the pressing force for sandwiching the rim work W is gradually increased). As a result, the rim work W is rolled (roll-formed) so that its outer peripheral surface follows the shape of the outer peripheral surface of the top roll T and its inner peripheral surface follows the shape of the outer peripheral surface of the bottom roll B. As a result, a wheel rim having a desired shape is obtained.

  After the wheel rim is obtained in this way, as shown in FIG. 20, the rotation angle of the servo motor 31 is controlled to raise the top roll T to separate it from the bottom roll B, and the pair of “ The hydraulic cylinder mechanism "is controlled to return the pair of guide rolls G to the" withdrawal position "and separate the pair of guide rolls G from the bottom roll B.

  Then, the pair of adjusting mechanisms 23 are used to return the positions of the pair of motors 21 in the axial direction (x-axis direction) from the “first position” to the “second position”. As a result, the two divided rolls B1 and B2 are separated from each other. As a result, as shown in FIG. 21, the rim work W drops, rolls on the discharge shooter 17 fixed to the side frame 12, and is discharged to the outside of the frame 10.

(Action / effect)
As described above, according to the present embodiment, by controlling the rotation angle of the servo motor 66 and adjusting the position of the base body 62 in the vertical direction (z-axis direction), the mounting portion 65 at the “setting position” with respect to the bottom roll B is set. The vertical position of "" can be adjusted. Therefore, when rim works having different outer diameters are placed on the "placement portion 65 at the set position", the rotation angle of the servo motor 66 is controlled so that the vertical position of the central axis of the rim work does not change. By doing so, the vertical position of the mounting portion 65 can be adjusted. As a result, even if the shape (especially the outer diameter) of the rim work used for roll forming is changed, it is not necessary to replace the mounting portion 65.

  Further, according to the present embodiment, by controlling the “air cylinder mechanism”, the placement unit 65 moves from the “retracted position” to the “set position” diagonally above the retracted position. Move in a straight line. For example, in the case where the configuration is such that the placement section moves linearly in the horizontal direction from the "retraction position" to the "set position", the rim work placed on the placement section is likely to fall from the placement section. In addition, the rim work placed on the placing portion easily interferes with the guide roll during the movement of the placing portion.

  On the other hand, according to the above configuration, the mounting portion 65 linearly moves obliquely upward from the “retracted position” to the “set position”. Therefore, during the movement of the mounting portion 65, an inertial force including a component of a force (downward force) in a direction of pressing the rim work W on the mounting portion 65 acts on the rim work W mounted on the mounting portion 65. obtain. As a result, the rim work W placed on the placing portion 65 drops from the placing portion 65 as compared with the case where the placing portion 65 moves linearly in the horizontal direction from the "retracted position" to the "set position". Hard to do. Furthermore, since the mounting portion 65 linearly moves obliquely upward from the “retracted position” to the “set position”, the rim work W mounted on the mounting portion 65 is less likely to interfere with the guide roll G.

  In addition, according to the above-described embodiment, by controlling the rotation angle of the servo motor 68, the position of the base body 62 (mounting portion 65) in the axial direction (x-axis direction) is the “operating position” and the “original position”. And can be adjusted within the range. Here, in the “original position” (see FIG. 5), the existence range of the pair of motor shafts 22 in which the base body 62 (mounting portion 65) is in the “bonded state” in the axial direction (x-axis direction). It is located outside. Therefore, for example, when exchanging the bottom roll B and the top roll T, the exchanging work is facilitated by moving the substrate 62 (placement portion 65) to the “home position”.

  The present invention is not limited to the above-described typical embodiments, and various applications and modifications are conceivable without departing from the object of the present invention. For example, it is also possible to implement each of the following modes to which the above embodiment is applied.

  In the above-described embodiment, as the servo motor 31, the pair of servo motors 54, the servo motors 66, and the servo motors 68, servo-mechanical electric motors having an encoder for detecting the rotation angle of the corresponding motor shaft are used. However, electric motors other than the servomechanical electric motor may be used as these motors.

  Further, in the above-described embodiment, the bottom roll formed by integrally joining the two divided rolls B1 and B2 is used as the bottom roll B, but one non-divided bottom roll is used as the bottom roll. May be done. In this case, one motor 21 and one adjustment mechanism 23 of the pair of motors 21 and the pair of adjustment mechanisms 23 are unnecessary.

  Further, in the above-described embodiment, the distance between the bottom roll B and the top roll T is adjusted by moving only the bottom roll B in the vertical direction (z-axis direction). However, only the top roll T or the bottom roll T is adjusted. The distance between the bottom roll B and the top roll T may be adjusted by moving both B and the top roll T in the vertical direction (z-axis direction).

  Further, in the above embodiment, the mounting portion 65 is configured to linearly move obliquely upward from the “retracted position” to the “set position”. It may be configured to move linearly in the horizontal direction to the “set position”.

  Further, in the above embodiment, the pair of guide rolls G (and various members related thereto) are provided, but the pair of guide rolls G (and various members related thereto) are omitted. May be.

  In the above embodiment, the position of the base body 62 (mounting portion 65) in the axial direction (x-axis direction) can be adjusted by controlling the rotation angle of the servo motor 68. The position of the mounting portion 65) in the axial direction (x-axis direction) may not be adjustable. In addition, in the above embodiment, the position of the pair of guide rolls G in the axial direction (x-axis direction) can be adjusted by controlling the rotation angle of the servo motor 54. The position of G in the axial direction (x-axis direction) may not be adjustable.

  21 ... Motor, 22 ... Motor shaft, 23 ... Adjustment mechanism, 31 ... Servo motor, 32 ... Motor shaft, 41 ... Motor, 42 ... Motor shaft, 51 ... Base body, 52 ... Moving body, 53 ... Rotation axis, 54 ... Servo Motor, 55 ... Motor shaft, 61 ... Movable base, 62 ... Base, 63 ... Cylinder part, 64 ... Moving body, 65 ... Placement part, 66 ... Servo motor, 67 ... Motor shaft, 68 ... Servo motor, 69 ... Motor Axis, B ... Bottom roll, B1, B2 ... Split roll, T ... Top roll, G ... Guide roll

Claims (5)

An annular rim work for forming a roll using both a top roll arranged on the outer circumference side of the rim work and a bottom roll arranged on the inner circumference side of the rim work, a manufacturing device of a wheel rim for an automobile,
A bottom roll mounting shaft for mounting the bottom roll,
A bottom roll drive mechanism that rotationally drives the bottom roll mounting shaft,
While arranged above the bottom roll mounting shaft, a top roll mounting shaft for mounting the top roll,
A top roll drive mechanism that rotationally drives the top roll mounting shaft,
A first adjusting mechanism for adjusting a distance between the bottom roll mounting shaft and the top roll mounting shaft;
A work supply mechanism that moves the rim work from a retracted position to a set position for setting the rim work on the bottom roll attached to the bottom roll attachment shaft,
Equipped with
The work supply mechanism is
A substrate,
A moving body that is supported so as to be movable relative to the base body and that includes a mounting portion that mounts the rim work;
A second adjustment mechanism capable of moving the mounting portion between the retracted position and the set position by adjusting the position of the movable body with respect to the base body;
A third adjusting mechanism for linearly adjusting the position of the base body with respect to the bottom roll mounting shaft only in the vertical direction ;
An apparatus for manufacturing a wheel rim for an automobile, which comprises: The manufacturing apparatus for a wheel rim for an automobile according to claim 1,
The work supply mechanism is
By adjusting the position of the movable body with respect to the base body, the placing part may be linearly moved from the retracted position to the set position located obliquely above the retracted position. A configured manufacturing device for automobile wheel rims. An apparatus for manufacturing an automobile wheel rim according to claim 2,
A guide roll mounting shaft that is disposed above the bottom roll mounting shaft and that mounts a guide roll for pressing the rim work set on the bottom roll from the outer peripheral side of the rim work,
A pressing mechanism for pressing the guide roll attached to the guide roll attachment shaft to the rim work,
An apparatus for manufacturing a wheel rim for an automobile, which comprises: An apparatus for manufacturing an automobile wheel rim according to any one of claims 1 to 3,
A fourth adjusting mechanism for adjusting the position of the base body with respect to the bottom roll mounting shaft with respect to the axial direction of the bottom roll mounting shaft,
The said 4th adjustment mechanism is a manufacturing apparatus of the wheel rim for motor vehicles with which the said base | substrate is comprised so that it can move to the axial direction of the said bottom roll attachment shaft to the outside of the existence range of the said bottom roll attachment shaft. An apparatus for manufacturing an automobile wheel rim according to claim 4,
The bottom roll mounting shaft is composed of a pair of bottom roll mounting shafts that are coaxially arranged apart from each other in the axial direction of the bottom roll mounting shaft,
Each of the bottom roll mounting shafts is one to which a corresponding split roll of the two split rolls forming the bottom roll is attached.
By adjusting the distance between the pair of bottom roll mounting shafts in the axial direction, the two split rolls mounted on the pair of bottom roll mounting shafts are coupled to each other to form the bottom roll. , A separation state in which the two divided rolls mounted on the pair of bottom roll mounting shafts are separated from each other in the axial direction, and a fifth adjusting mechanism is provided.
In the wheel rim for an automobile, the fourth adjusting mechanism is configured to be movable in the axial direction of the bottom roll mounting shaft to the outside of the existence range of the pair of bottom roll mounting shafts in which the base body is in the coupled state. Manufacturing equipment.

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