JP2019111537A - Frame molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame forming apparatus capable of improving the production efficiency of a frame having a groove-shaped cross section constituting a vehicle body frame. SOLUTION: In a frame forming apparatus, each of a pair of left and right stands 42 facing each other in the left-right direction has a first roll 43 and a second roll 44 located below the first roll 43 as a central axis in the left-right direction. A roll forming device in which roll groups 45 that are rotatably supported and whose first rolls 43 and second rolls 44 face each other in the left-right direction are arranged in the forming direction. The width adjuster 50, the web thickness adjuster 65 that relatively moves the first roll 43 and the second roll 44 in each of the pair of left and right stands 42 in the vertical direction, and the first roll in each of the pair of left and right stands 42. A flange thickness adjusting machine 80 for relatively moving the 43 and the second roll 44 in the left-right direction is provided. [Selection diagram] Fig. 3

Description

  The present invention relates to a frame forming apparatus for forming a frame that constitutes a vehicle body frame of a large automobile such as a truck.

  A large automobile such as a truck includes a body frame to which an engine, an exhaust gas purification device, and the like are connected, and a cab supported by the body frame. The vehicle body frame is constituted by various frames such as a pair of side frames extending in the front-rear direction of the vehicle and a plurality of cross members bridged between the pair of side frames. Such a frame has the shape of a grooved cross-section which is a structure of high mechanical strength. The frame of the grooved cross section has the web and the flange integrally connected to both ends of the web, and the web width, the flange length and the thickness are set according to the design conditions of the occasion. Such a grooved cross-sectional frame is generally manufactured by forming a flat plate-shaped substrate with a frame forming apparatus such as a large press, as disclosed in Patent Document 1, for example.

JP, 2013-049086, A

  The molding of the frame by the press can improve the production efficiency by continuously producing the frame using a mold attached to the press. However, molding of a frame by such a press requires a mold for each shape of the frame, and when molding frames having different shapes, replacement of the mold is required. Therefore, in recent years when the structure of the vehicle body frame has become diverse, the frequency of tool replacement has increased, causing a decrease in production efficiency.

  An object of the present invention is to provide a frame forming apparatus capable of improving the production efficiency of a frame having a grooved cross section that constitutes a vehicle body frame.

  A frame forming apparatus for solving the above problems is a frame forming apparatus for forming a flat base material into a frame of a grooved cross section having a web and a flange integrally connected to both ends of the web, The apparatus rotatably supports a first roll and a second roll positioned below the first roll such that each of a pair of left and right stands opposing each other in the left-right direction can be rotated about the left-right direction as a central axis. A roll group is configured by the rolls and the second rolls facing each other in the left and right direction, and the roll group is a roll forming apparatus in which the roll group is aligned in the forming direction, and the pair of left and right stands are relatively moved in the left and right direction. A web width adjusting machine for moving the first roll and the second roll relative to each other in the vertical direction in each of the web width adjusting machine and the pair of left and right stands , And a flange thickness adjuster for relative movement and the said first roll second roll to the right and left direction in each of the pair of left and right stands.

  According to the above configuration, it is possible to form a frame having a different web width by relatively moving the pair of stands in the left-right direction using the web width adjustment machine. Also, by moving the first roll and the second roll relative to each other using the web thickness adjuster and the flange thickness adjuster, it is possible to form a frame from substrates of different thicknesses. As a result, since it is possible to form a frame having a different shape without replacing the roll, the production efficiency of the frame can be improved.

  In the frame forming apparatus having the above-described configuration, it is preferable that the web width adjuster move the pair of left and right stands in the opposite direction by the same amount of movement when the pair of left and right stands move relative to each other.

  According to the above configuration, even if the pair of left and right stands are moved relative to each other, the center between the pair of left and right first rolls and the center between the pair of left and right second rolls can be held at the same position. This eliminates the need to change the center position of the substrate in the left-right direction, for example, when molding frames having different web widths from the same substrate. As a result, the production efficiency of the frame can be further improved.

In the frame forming apparatus having the above configuration, each of the pair of left and right stands preferably supports a plurality of upper and lower roll pairs configured by the first roll and the second roll.
According to the above configuration, the plurality of roll groups are configured by the pair of left and right stands. Therefore, the change of the web width in several roll groups can be performed simultaneously.

  In the above-described frame forming apparatus, the web thickness adjuster moves the first roll in the vertical direction with respect to the stand, and the flange thickness adjuster adjusts the second roll to the stand. Alternatively, it may be moved in the lateral direction.

  According to the above configuration, for example, the relative movement of the first roll and the second roll in the vertical direction can be realized simply by moving the first roll with respect to the stand, and the second The relative movement of the first roll and the second roll in the lateral direction can be realized simply by moving the roll. As a result, the configuration of the web thickness adjuster and the configuration of the flange thickness adjuster can be simplified.

  In the frame forming apparatus having the above configuration, the web thickness adjuster is a first roll unit which is movably attached to the stand in the vertical direction to rotatably support the first roll. The first roll unit having an inclined surface inclined with respect to the orthogonal direction orthogonal to the vertical direction, and the first roll unit mounted movably in the orthogonal direction with respect to the stand and in surface contact with the inclined surface It is preferable that a unit support member for supporting the roll unit is provided, and the movement amount of the first roll unit in the vertical direction is defined by the movement amount of the unit support member in the orthogonal direction.

  According to the above configuration, the amount of movement of the first roll in the vertical direction is defined by the amount of movement of the unit support member in a direction different from the vertical direction. It is possible to reduce the amount of movement. As a result, the position of the first roll in the vertical direction can be adjusted with high accuracy.

  In the frame molding device configured as described above, a transmission mechanism that transmits power between a first drive gear that drives the first roll and a second drive gear that drives the second roll, each of the pair of left and right stands And the transmission mechanism is rotatably supported by the stand with the left and right direction as a central axis and rotates with the stand with a first idle gear meshed with the first drive gear, and the left and right direction as the central axis. When it is possible to support and engage the first idle gear and the second idle gear and the second idle gear, and the first roll is located at the center position of the movement range in the vertical direction, It is preferable that the central axis of the first drive gear and the central axis of the first idle gear be positioned at the same height.

  According to the above configuration, even if the first roll moves in the vertical direction from the central position, the amount of change in the central distance between the first drive gear and the first idle gear can be made smaller than the amount of movement. As a result, even if the first roll moves in the vertical direction, reliable power transmission can be performed between the first drive gear and the first idle gear.

(A) Side view which shows typically schematic structure of one Embodiment of flame | frame shaping | molding apparatus, (b) Top view which shows schematic structure of one Embodiment of flame | frame shaping | molding apparatus typically. Sectional drawing which shows the shape of a flame | frame. The figure which shows typically the structure of the shaping | molding unit in line 3-3 in FIG. The side view which shows the structure of the lower part of a shaping | molding unit typically. The figure which shows typically an example of the structure of a web width | variety adjustment machine. (A) (b) The figure which shows typically the movement aspect of the stand by a web width adjustment machine. The figure which shows typically the movement aspect of the 1st roll by the web width adjustment machine, and a 2nd roll. The figure which shows typically the structure of an example of a web thickness adjustment machine. The figure which shows typically the movement aspect of the 1st roll by (a) and (b) web thickness adjustment machine. The figure which shows typically an example of the structure of a flange thickness adjustment machine. The figure which shows typically the movement aspect of the 1st roll by web thickness adjustment machine, and the movement aspect of the 2nd roll by flange thickness adjustment machine. It is a figure which shows an example of a power transmission mechanism typically, Comprising: The figure which shows the state which the 1st roll is located in the center position. The figure which shows the state which the 1st drive gear moved upward by the largest movement amount.

(Schematic configuration of frame forming apparatus)
One embodiment of a frame forming apparatus will be described with reference to FIGS. 1 to 13. First, a schematic configuration of the frame forming apparatus will be described with reference to FIG.

  As shown in FIG. 1A and FIG. 1B, the frame forming apparatus 10 is a roll forming apparatus installed on a flat floor surface 11. The frame forming apparatus 10 includes a roll forming machine 30 for forming a frame 13 having a grooved cross section while moving the base 12 having a flat plate shape along a forming direction along the floor surface 11; A carry-in machine 15 for carrying in 12 and a carry-out machine 25 used for carrying out the frame 13 formed by the roll forming machine 30 are provided. In the following, the direction orthogonal to the floor surface 11 is referred to as the vertical direction, and the direction parallel to the floor surface 11 is referred to as the horizontal direction.

(Loading machine 15)
The loading machine 15 has a loading base 16 fixed to the floor surface 11 and a plurality of loading rollers 17 supported by the upper end of the loading base 16. The plurality of carry-in rollers 17 are juxtaposed in the molding direction of the base material 12 and configured to be rotatable with the left and right direction as the central axis. Further, the loading machine 15 has a plurality of pair of left and right guiding rollers 18 installed at predetermined intervals in the molding direction of the base 12 with respect to the loading base 16, for example, every several meters. The pair of left and right guide rollers 18 are disposed at symmetrical positions with respect to the center plane C of the frame forming apparatus 10 in the left and right direction. The pair of left and right guide rollers 18 are rotatably supported around the vertical direction as a central axis, and are configured to be movable in the lateral direction with respect to the carry-in base 16 and to be fixed at a desired position. The pair of left and right guide rollers 18 aligns the longitudinal direction of the base 12 with the forming direction by positioning the base 12 in the left and right direction, and arranges the center in the lateral direction of the base 12 on the center plane C. The straightness of the base material 12 is such that the base material 12 advances in the molding direction while the longitudinal direction of the base material 12 matches the molding direction and the center of the substrate 12 in the short side direction is located at the center plane C. It is said.

(Transporter 25)
The unloader 25 includes an unloading base 26 fixed to the floor surface 11 and a plurality of unloading rollers 27 installed on the unloading base 26. The plurality of discharge rollers 27 are arranged in parallel in the forming direction, and are configured to be rotatable around the left and right direction as a central axis. In the unloading machine 25, the frame portion of which the forming by the roll forming machine 30 is completed moves in the forming direction while rolling the unloading roller 27. Then, the unloader 25 temporarily stores the frame 13 before being unloaded from the frame forming apparatus 10.

(Roll forming machine 30)
The roll forming machine 30 has an input part 35, a forming part 40, and a correction part 115 in order from the upstream side in the forming direction. The roll forming machine 30 includes a base 31 having a flat installation surface 31 a and fixed to the floor surface 11. The forming unit 40 is installed on the installation surface 31 a of the base 31.

(Injecting section 35)
The input unit 35 is located at a position adjacent to the forming unit 40 on the upstream side in the forming direction, and inserts the base 12 into the forming unit 40 while maintaining the rectilinearity of the base 12. The input unit 35 includes a pair of left and right input bases 36 fixed to the upstream end surface of the forming unit 41 constituting the forming section 40, guide rails 37 fixed to the input bases 36 and extending in the left-right direction, and each guide rail A pair of left and right holding rollers 38 are mounted movably at 37 and located at symmetrical positions about the central plane C. The guide rails 37 are juxtaposed in the forming direction, and the pair of left and right holding rollers 38 are rotatably attached to each of the guide rails 37 with the vertical direction as a central axis. The pair of left and right holding rollers 38 aligned in the forming direction is set to have a smaller distance in the forming direction than the guide roller 18 of the loading machine 15, for example, several tens of centimeters.

  In a state in which a part of the base 12 is inserted into the forming unit 40, in particular, in a state where the end portion of the base 12 is positioned between the loading machine 15 and the forming unit 40, Straightness of the material 12 is easily lost. In this respect, the pair of left and right holding rollers 38 are positioned close to the forming portion 40, and the distance in the forming direction is set to be smaller than the guide roller 18 of the loading machine 15. Thereby, even if the end portion of the base 12 is positioned between the forming unit 40 and the loading machine 15, the straightness of the base 12 can be easily maintained. The holding roller 38 may be manually changeable in position, or may be changeable in position using, for example, a servomotor.

(Forming part 40)
The forming unit 40 has a plurality of forming units 41 aligned in the forming direction. Each forming unit 41 has a pair of left and right stands 42 opposed to each other in the left-right direction with the center plane C as the center. Each of the pair of left and right stands 42 rotatably supports the first roll 43 and the second roll 44 located below the first roll 43 with the left and right direction as a central axis. One first roll 43 and one second roll 44 corresponding to the first roll 43 constitute a pair of upper and lower rolls. The first roll 43 and the second roll 44 supported by each of the pair of left and right stands 42 face each other in the left-right direction with the center plane C as a center, so that the pair of left and right first rolls 43 and the pair of left and right second rolls 44 Thus, one roll group 45 (see FIG. 3) is configured. Each of the pair of left and right stands 42 has a plurality of upper and lower roll pairs (four in this embodiment) aligned in the forming direction. That is, each forming unit 41 has a roll group 45 aligned in the forming direction by the same number as the number of upper and lower roll pairs possessed by the pair of left and right stands 42.

  Thus, the forming unit 40 has a plurality of stages of roll groups 45 aligned in the forming direction. Each roll group 45 shapes the base material 12 into a cross-sectional shape corresponding to the shape of the first roll 43, the shape of the second roll 44, and the relative position of the first roll 43 and the second roll 44. The forming unit 40 forms the flat base material 12 into the frame 13 of the grooved cross section by performing the forming using the roll group 45 in a plurality of steps in stages.

  FIG. 2 is a cross-sectional view showing the shape of the frame 13. As shown in FIG. 2, the frame forming apparatus 10 is a web corresponding to a base 12 having a flat plate shape of thickness t at the bottom of the grooved cross section. It is formed into a frame 13 of grooved cross section comprising a pair 13a and a pair of flanges 13b extending from both ends of the web 13a. The width of the web 13a is called web width W, the angle between the web 13a and the flange 13b is called bending angle θ, and the final bending angle θ is called design angle.

  As shown in FIG. 3, the forming unit 41 includes a web width adjuster 50, a web thickness adjuster 65, and a flange thickness adjuster 80 on the pair of left and right stands 42. The web width adjuster 50 adjusts the web width W. The web thickness adjuster 65 adjusts the web thickness ta which is the distance between the first roll 43 and the second roll 44 in a portion corresponding to the web 13 a to a value corresponding to the thickness t of the substrate 12. The flange thickness adjuster 80 adjusts the flange thickness tb, which is the distance between the first roll 43 and the second roll 44 in the portion corresponding to the flange 13 b, to a value corresponding to the thickness t of the base 12. The forming conditions such as the thickness t of the substrate 12 and the web width W are input through the input device 121 to the control device 120 that controls the frame forming apparatus 10 in an integrated manner. When new molding conditions are input from the input device 121, the control device 120 adjusts the web width W, the web thickness ta, and the flange thickness tb using various adjusters.

(Web width adjustment machine 50)
As shown in FIGS. 3 and 4, the web width adjuster 50 adjusts the web width W for each roll group 45 of the forming unit 41 by relatively moving the pair of left and right stands 42 in the left and right direction. The web width adjustment machine 50 is fixed to the installation surface 31 a of the base 31 and extends along the horizontal direction below the respective stands 42 and fixed to the respective stands 42 so as to be movable relative to the respective linear guides 51 And a plurality of sliders 52 configured in FIG. The web width adjustment device 50 has a guide mechanism configured by the linear guide 51 and the slider 52 below each of the upper and lower roll pairs.

  As shown in FIG. 5, the web width adjuster 50 relatively moves the pair of left and right stands 42 in the left and right direction using a ball screw mechanism. The web width adjuster 50 has a nut 54 having a central axis extending in the left-right direction and non-rotatably attached to each of the pair of left and right stands 42, and a screw portion 55 engaged with each of the nuts 54. And a stand movement axis 56 extending along the direction. The nut 54 and the screw portion 55 have a screw structure in which the pitch is equal in the pair of left and right stands 42 and the winding directions in the pair of left and right stands 42 are different from each other. That is, the web width adjustment machine 50 uses a ball screw mechanism having a screw structure in which the winding directions between the pair of left and right stands are different from each other for connecting the stand moving shaft 56 and the pair of left and right stands 42.

  The web width adjustment machine 50 has a plurality of stand moving shafts 56 aligned in the forming direction, and in the present embodiment, two stand moving shafts 56. One of the two stand moving shafts 56 is disposed so as to pass below the first stage roll group 45 positioned on the most upstream side in the forming direction of each stand 42. The other of the two stand moving shafts 56 is disposed to pass below the fourth stage roll group 45 located at the most downstream side in the forming direction of each stand 42. The stand moving shafts 56 project to one side in the left-right direction more than the stand 42, and the tip end thereof is located above the exposed portion of the base 31.

  The web width adjustment machine 50 has a stand drive source 57 for driving the stand movement shaft 56 at a position sandwiched by the projecting portions of the stand movement shaft 56. Stand drive source 57 is configured using, for example, a servomotor. The stand drive source 57 and each stand moving shaft 56 are a first conversion mechanism 58, a power transmission shaft 59 extending from the first conversion mechanism 58 toward the respective stand movement shafts 56 along the forming direction, and a power transmission shaft 59. And the stand moving shaft 56 are connected via a second conversion mechanism 60.

  The first conversion mechanism 58 converts the rotational movement of the output shaft of the stand drive source 57 into rotational movement of each power transmission shaft 59 centering on the forming direction. The first conversion mechanism 58 converts rotational motion so that the number of rotations and the rotational direction of each power transmission shaft 59 are the same. The second conversion mechanism 60 converts the rotational movement of the power transmission shaft 59 whose central axis is the molding direction into the rotational movement of the stand moving shaft 56 whose central axis is the lateral direction. The second conversion mechanism 60 converts the rotational movement so that the number of rotations and the rotational direction of each stand moving shaft 56 become the same.

(Function of web width adjustment machine 50)
As shown in FIGS. 6 (a) and 6 (b), the web width adjuster 50 described above rotates the respective stand moving shafts 56 with the same number of rotations and rotational directions with the horizontal direction as the central axis by the drive of the stand drive source 57. Rotate to. Then, the web width adjuster 50 simultaneously moves the pair of left and right stands 42 in the opposite directions in the left and right direction by the same amount of movement. For example, the web width adjusters 50 move the stands 42 so that they approach each other when the stand moving shafts 56 rotate to the front side of the drawing with the horizontal direction as the central axis, and the respective stand moving shafts 56 use the horizontal direction as the central axis. The stand 42 is moved away from each other when it is rotated to the back side of the drawing.

  That is, as shown in FIG. 7, the web width adjustment machine 50 holds the distance in the left-right direction while keeping the center in the left-right direction on the center plane C for each of the first roll 43 and the second roll 44 in each roll group 45 Change The web width adjustment machine 50 changes the web width W to a smaller web width W1 by bringing the left and right stands 42 closer to each other, and the web width W becomes larger by separating the left and right stands 42 from each other. Change to Thus, the web width adjustment machine 50 adjusts the web width W without changing the web thickness ta and the flange thickness tb in each roll group 45 through the relative movement of the pair of left and right stands 42.

(Web thickness adjustment machine 65)
As shown in FIG. 3, the web thickness adjuster 65 adjusts the web thickness ta by changing the relative position between the first roll 43 and the second roll 44 constituting the upper and lower roll pair in the vertical direction. The web thickness adjuster 65 rotatably supports the first drive shaft 43 a of the first roll 43 by one or more bearings (not shown) and is movably attached to the stand 42 along the vertical direction. A roll unit 66 is provided. The web thickness adjuster 65 moves the first roll unit 66 in the vertical direction with respect to the stand 42 to change the relative position between the first roll 43 and the second roll 44 in the vertical direction. Adjust the The adjustment amount of the web thickness ta is on the order of 0.01 mm. When the web thickness adjuster 65 sets the position of the reference first roll 43 as the center position, the maximum moving amount h (see FIG. 13) with respect to the center position is set to, for example, ± 4 mm.

  As shown in FIG. 8, the first roll unit 66 has a first unit body 67, a connecting member 68, and a guiding member 69. The first unit main body 67 rotatably supports the first drive shaft 43 a of the first roll 43 by a plurality of bearings (not shown). The connecting member 68 is a member for connecting the first unit main body 67 and the guide member 69, and a proximal end fixed to the first unit main body 67 and a portion extending upward from the proximal end than the stand 42 And a tip located at the upper side. The connecting members 68 are juxtaposed in the left-right direction. The guide member 69 is fixed to the tip of each connecting member 68, and is an inclined surface that is inclined with respect to the left-right direction, which is one of the orthogonal directions orthogonal to the vertical direction. It has the inclined surface 69a extended in the left-right direction so that it may be located upwards.

  The web thickness adjuster 65 has a unit support member 70 mounted movably in the left-right direction which is one of the orthogonal directions with respect to the stand 42. The unit support member 70 has a support surface 70a that can be in surface contact with the inclined surface 69a.

  The inclination angle of the inclined surface 69a and the support surface 70a is an angle at which the moving amount of the guide member 69 in the vertical direction is smaller than the moving amount of the unit support member 70 in the orthogonal direction. That is, the inclination angle is less than 45 ° with respect to the movement direction of the unit support member 70. In addition, the unit support member 70 may be configured to define the amount of movement of the guide member 69 in the vertical direction by the amount of movement in the direction orthogonal to the vertical direction, and in the orthogonal direction orthogonal to the vertical direction. It may be movable in the direction intersecting the inclined surface 69a.

  The web thickness adjuster 65 has a first drive source 71 fixed to the stand 42 via a bracket or the like (not shown). The first drive source 71 is configured using, for example, a servomotor. The first drive source 71 has a first roll movement shaft 72 whose central axis is in the left-right direction. The first roll movement shaft 72 is connected to the unit support member 70 via a ball screw mechanism.

  In addition, the web thickness adjuster 65 has a hydraulic cylinder 73 as an up and down motive device configured to move the first unit main body 67 in the up and down direction. The hydraulic cylinder 73 is fixed to the stand 42 and is provided with a cylinder portion 74 to which hydraulic pressure is supplied through a pipe (not shown), and an expansion and contraction configured with respect to the cylinder portion 74 and connected to the first unit main body 67 And a rod 75. At the time of adjusting the web thickness ta, the hydraulic cylinder 73 moves the first unit body 67 along the vertical direction. On the other hand, at the time of molding of the frame 13, in the hydraulic cylinder 73, a holding hydraulic pressure that keeps the expansion amount of the expansion rod 75 constant is supplied to the cylinder portion 74. That is, the hydraulic cylinder 73 functions as a displacement suppressor that suppresses displacement of the first roll 43 even if the first roll 43 is displaced upward by a reaction force accompanying molding when the frame 13 is formed, and changes in web thickness ta during molding suppress.

(Function of web thickness adjustment machine 65)
As shown in FIG. 9A, when moving the first roll 43 upward, the hydraulic cylinder 73 first raises the first roll unit 66. Thereafter, the first drive source 71 causes the first roll movement shaft 72 to rotate in the forward direction to move the unit support member 70 away from the first roll 43. When the unit support member 70 reaches the target position, the first drive source 71 is stopped, and the hydraulic cylinder 73 lowers the first roll unit 66. Then, when the inclined surface 69a of the guide member 69 is in surface contact with the support surface 70a of the unit support member 70 and the first roll unit 66 is disposed at a predetermined position, the supply of holding hydraulic pressure to the hydraulic cylinder 73 is started.

  As shown in FIG. 9B, when moving the first roll 43 downward, the hydraulic cylinder 73 first raises the first roll unit 66. Thereafter, the first drive source 71 reverses the first roll movement shaft 72 to move the unit support member 70 in a direction approaching the first roll 43. When the unit support member 70 reaches the target position, the first drive source 71 is stopped and the hydraulic cylinder 73 lowers the first roll unit 66. Then, when the inclined surface 69a of the guide member 69 is in surface contact with the support surface 70a of the unit support member 70 and the first roll unit 66 is disposed at a predetermined position, the supply of holding hydraulic pressure to the hydraulic cylinder 73 is started.

(Flange thickness adjuster 80)
As shown in FIG. 3, the flange thickness adjuster 80 has a second roll unit 81 mounted immovably with respect to the stand 42 below the first roll unit 66. The second roll unit 81 rotatably supports the second drive shaft 44a of the second roll 44 by a plurality of bearings (not shown), and the second drive shaft 44a of the second roll 44 is movable along the left-right direction. Is configured.

  As shown in FIG. 10, the second roll unit 81 rotatably supports the second drive shaft 44a of the second roll 44. The second drive shaft 44a has a large diameter portion 44b to which the second roll 44 is attached, and a small diameter portion 44c to which the second drive gear 105 for driving the second roll 44 is attached. The second roll unit 81 slides the second unit main body 82 mounted immovably with respect to the stand 42 and the inner side surface 82a of the second unit main body 82 along the left and right direction via oilless plates 83 and 84. There is a possible sliding member 85.

  The sliding member 85 includes an inner support 86, an outer support 87, and a connecting portion 88. The inner support portion 86 is configured to be slidable in the left and right direction on the inner side surface 82 a of the second unit body 82 via the oilless plate 83. The inner support portion 86 is driven at the second roll 44 side with respect to the second drive gear 105 via a pair of tapered roller bearings 89, 90 facing each other in the left-right direction with a predetermined interval by, for example, a spacer. The large diameter portion 44b of the shaft 44a is rotatably supported. A pair of tapered roller bearings 89, 90 are screwed on an engagement collar portion 44d integrally formed on the large diameter portion 44b of the second drive shaft 44a and a male screw portion formed on an end of the large diameter portion 44b. By being held between the bearing nut 91 and the bearing nut 91, a pressurizing force is applied.

  The outer support portion 87 is configured to be slidable along the left and right direction on the inner side surface 82 a of the second unit main body 82 via the oilless plate 84, and the opposite side of the second roll 44 with respect to the second drive gear 105. The small diameter portion 44c of the second drive shaft 44a is rotatably supported via the radial bearing 92. The radial bearing 92 is pressed against the bearing engaging portion 87a of the outer support portion 87 by a bearing nut 93 which is screwed to an external thread formed at the end of the small diameter portion 44c. The connecting portion 88 integrally connects the inner supporting portion 86 and the outer supporting portion 87 while avoiding interference with the second drive gear 105 and other gears described later.

  The flange thickness adjuster 80 moves the sliding member 85 in the left-right direction using a ball screw mechanism. The flange thickness adjuster 80 extends in the left-right direction with a nut 95 which is set to the central axis in the left-right direction and attached to the outer support 87 in a non-rotatable manner, and a screw shaft engaged with the nut 95. And a second roll moving shaft 96. The second roll movement shaft 96 is driven by a second drive source 97 fixed relative to the second unit body 82. The second drive source 97 is configured using, for example, a servomotor.

  The flange thickness adjuster 80 moves the sliding member 85 in the direction approaching the central plane C by the normal rotation of the second roll moving shaft 96 by the second drive source 97. At this time, the sliding member 85 moves while pressing the engagement collar portion 44 d toward the central surface C by the tapered roller bearing 89. Thereby, flange thickness tb becomes large. Further, the flange thickness adjuster 80 moves the sliding member 85 in a direction away from the center plane C by the reverse rotation of the second roll movement shaft 96 by the second drive source 97. At this time, the sliding member 85 moves while pressing the bearing nut 91 in the direction opposite to the center plane C by the tapered roller bearing 90. Thus, the flange thickness tb is reduced.

(Operation of web thickness adjusting machine 65 and flange thickness adjusting machine 80)
As shown in FIG. 11, when the thickness t of the substrate 12 decreases from t0 to t1, the web thickness adjuster 65 and the flange thickness adjuster 80 described above are equal to the difference Δt1 (= t0−t1) The first roll 43 is moved downward, and the second roll 44 is moved to the opposite side of the central plane C by an amount based on the difference Δt 1 and the bending angle θ of the roll group 45. When the thickness t of the substrate 12 increases from t0 to t2, the first roll 43 is moved upward by the difference Δt2 (= t2−t0), and the difference Δt2 and the bending angle of the roll group 45 The second roll 44 is moved toward the central plane C by an amount based on θ. Thus, the web thickness adjuster 65 and the flange thickness adjuster 80 adjust the web thickness ta and the flange thickness tb of the frame 13 while holding the web width W. The adjustment by the various adjusters 50, 65, 80 may be performed at the same time or in order.

(Power transmission mechanism 100)
The power transmission mechanism 100 for transmitting power to the first roll 43 and the second roll 44 in each forming unit 41 will be described with reference to FIGS. 3, 5, 12 and 13.

  As shown in FIGS. 3 and 5, each forming unit 41 is a roll common to the first and second rolls 43 and 44 constituting the odd-numbered stage roll group 45 and the even-numbered stage roll group 45. Power is transmitted from the drive source 101. Each forming unit 41 has a pair of roll drive sources 101. One roll drive source 101 drives two roll groups 45 located on the upstream side in the forming direction. The other roll drive source 101 drives two roll groups 45 located downstream of the forming direction. The roll drive source 101 has an input shaft 102 extending in the left-right direction below the second roll unit 81 corresponding to the second or third roll group 45. Each roll drive source 101 is fixed to the slide base 109. In the slide base 109, a slider 52 guided by linear guides 51 corresponding to the second and third roll groups 45 is fixed. The slide base 109 and the stand 42 are connected by a pair of connecting members 110 arranged in the forming direction. That is, the slide base 109 is configured to move along the left-right direction together with the stand 42 by the web width adjuster 50.

  The input shaft 102 is rotatably supported by each of the pair of left and right stands 42 with the left and right direction as a central axis. The roll drive source 101 drives the input gear 103 connected to the input shaft 102 by rotating the input shaft 102 at a constant speed.

  As shown in FIG. 12, the power transmission mechanism 100 includes a first drive gear 104 connected to a first drive shaft 43a, a second drive gear 105 connected to a second drive shaft 44a, and a first drive gear 104. And an intermediate transmission mechanism capable of transmitting power between the second drive gear 105 and the second drive gear 105. The input gear 103 meshes with a second drive gear 105 that drives the second roll 44 of the second or third stage. The power transmission mechanism 100 is configured such that the speed transmission ratio to the input gear 103 is equal in each first drive gear 104 and is equal in each second drive gear 105.

  The intermediate transmission mechanism has a first idle gear 106 and a second idle gear 107 meshing with each other. In addition to the second idle gear 107, the first idle gear 106 meshes with both the first drive gear 104 in the odd-numbered stage and the first drive gear 104 in the even-numbered stage. The central axis 106 a of the first idle gear 106 is set at the same height as the central axis 104 a of the first drive gear 104 when the first roll 43 is positioned at the center position. A reference center distance P which is a center distance between the first idle gear 106 and the first drive gear 104 when the first roll 43 is located at the center position is, for example, a value of several tens cm order such as 40 cm. In addition to the first idle gear 106, the second idle gear 107 meshes with both the second drive gear 105 in the odd-numbered stage and the second drive gear 105 in the even-numbered stage. The central axis 107 a of the second idle gear 107 is located at the same height as the central axis 105 a of the second drive gear 105.

  In the power transmission mechanism 100 having such a configuration, the power input to the input gear 103 is transmitted to the second idle gear 107 after being transmitted to the second and third drive gears 105. The second idle gear 107 transmits power to the first idle gear 106 and the second drive gear 105 in the first and fourth stages. The first idle gear 106 transmits power to the odd-numbered first drive gear 104 and the even-numbered first drive gear 104. In the power transmission mechanism 100, the input gear 103 inputs the power of the roll drive source 101 to any one of the second drive gear 105, the first idle gear 106, and the second idle gear 107. It should just be comprised.

(Function of the intermediate transfer mechanism)
As shown in FIG. 13, in the above-described intermediate transmission mechanism, when the first roll 43 is located at the central position, the central axis 106 a of the first idle gear 106 is the same as the central axis 104 a of the first drive gear 104. The height is arranged. Further, the maximum moving amount h of the first roll 43 with respect to the central position is on the order of millimeters, and the central distance between the first drive gear 104 and the first idle gear 106 when the first roll 43 is positioned at the central position. A certain reference center distance P is several tens of centimeters. Therefore, even if the first roll 43 is moved in the vertical direction by adjusting the web thickness ta by the web thickness adjuster 65, the amount of change in the central distance can be made smaller than the amount of movement. For example, in the case where the reference center distance P is 40 cm and the maximum moving amount h is 4 mm, the amount of change ΔP in center distance (= center distance P2−reference center distance P) may be +0.02 mm. This satisfies N7 and N8 in the gear accuracy grade specified in Japan Gear Industry Standard JGMA 1101-01 (2000).

(Correction part 115)
As shown in FIG. 1, the correction unit 115 is a pair of upper and lower correction rolls formed by the upper correction roll 116 and the lower correction roll 117 located below the upper correction roll 116 from the upstream side in the molding direction The front correction roll pair and the rear correction roll pair are provided in order. The front stage correction roll pair is located above the roll group 45 forming the forming unit 40, and the rear side correction roll pair is located at the same height as the roll group 45 forming the forming section 40. The correction unit 115 reduces the warping of the frame 13 in the longitudinal direction due to the residual strain by reducing the residual stress in the central portion.

According to the frame molding device 10 of the above embodiment, the following effects can be obtained.
(1) The frame forming apparatus 10 includes a web width adjuster 50 capable of adjusting the web width W, a web thickness adjuster 65 capable of adjusting the web thickness ta, and a flange thickness capable of adjusting the flange thickness tb. A regulator 80 is provided. Therefore, in the frame forming apparatus 10, the frame 13 can be formed from the frame 13 with different web width W and the base material 12 with different thickness t without replacing the first roll 43 and the second roll 44. As a result, the production efficiency of the frame 13 can be improved. Moreover, since the frames 13 with different shapes can be produced from time to time by the improvement of the production efficiency, it is possible to suppress the need to store the frames 13 with different shapes as stock. As a result, it is also possible to reduce the occupied space involved in the molding of the frame, including the stock of the frame 13 and the storage of molds.

  (2) The web width adjuster 50 simultaneously moves the pair of left and right stands 42 in the opposite directions by the same amount of movement. Therefore, even if the pair of left and right stands 42 are moved relative to each other, the center of the pair of left and right first rolls 43 and the center of the pair of left and right second rolls 44 can be held at the center plane C. Thus, for example, when forming the frames 13 having different web widths W from the same base material 12, it is not necessary to change the center position of the base material 12 in the left-right direction. As a result, the production efficiency of the frame 13 can be further improved.

  (3) In the forming unit 41, each of the pair of left and right stands 42 supports a plurality of upper and lower roll pairs constituted by the first roll 43 and the second roll 44. That is, one forming unit 41 has a plurality of roll groups 45 aligned in the forming direction. Therefore, the web width W in the plurality of roll groups 45 can be changed at the same time by relatively moving one set of the pair of left and right stands 42 in the left and right direction. Further, in the plurality of roll groups 45, the spacing between the first rolls 43 and the spacing between the second rolls 44 can be made equal.

  (4) In the web width adjusting machine 50, a ball screw mechanism having a screw structure in which the winding directions with respect to the stand 42 are different from each other is used for connecting the stand moving shaft 56 and the pair of left and right stands 42. Therefore, by the rotation of the stand moving shaft 56, the pair of left and right stands 42 can be simultaneously moved in the opposite direction by the same moving amount. Further, since the pair of left and right stands 42 are connected by the stand moving shaft 56, the mechanical strength to the load in the left and right direction can be enhanced as a whole of the forming unit 41.

  (5) The web width adjusting machine 50 has a plurality of guide mechanisms configured by the linear guides 51 and the sliders 52 along the forming direction, and has a plurality of stand moving shafts 56 at intervals in the forming direction. doing. According to such a configuration, the forming unit 41 can be stably supported on the base 31 because the portions where the position of the stand 42 is partially defined are distributed in the forming direction. As a result, dimensional errors caused by the adjustment of the web width W can be suppressed.

  (6) The web width adjustment machine 50 drives the stand moving shafts 56 aligned in the forming direction by one stand drive source 57. Therefore, as compared with a configuration in which the stand drive source 57 is provided for each of the stand moving shafts 56, errors such as the rotational speed of the stand moving shaft 56 can be reduced.

  (7) The web thickness adjuster 65 moves the first roll 43 vertically with respect to the stand 42. Further, the flange thickness adjuster 80 moves the second roll 44 in the left-right direction with respect to the stand 42. Therefore, it is possible to embody the relative movement of the first roll 43 and the second roll 44 in the vertical direction only by moving the first roll 43 with respect to the stand 42, and the second roll 44 relative to the stand 42. The relative movement of the first roll 43 and the second roll 44 in the left-right direction can be embodied simply by moving it. As a result, the configuration of the web thickness adjuster 65 and the configuration of the flange thickness adjuster 80 can be simplified. Moreover, it is not necessary to change the feeding position of the base 12 relative to the forming unit 40 in the vertical direction.

  (8) Further, the relative movement between the first roll 43 and the second roll 44 can also be achieved, for example, by moving both the first roll 43 and the second roll 44 in the vertical and horizontal directions with respect to the stand 42. It can be embodied. However, in such a configuration, it is necessary to intensively arrange a mechanism for moving the first roll 43 vertically and horizontally to the driving portion of the first roll 43, and the structure of the web thickness adjuster 65 and the flange thickness adjuster 80 Becomes complicated. In this respect, according to the above-described configuration, by arranging the web thickness adjuster 65 and the flange thickness adjuster 80 apart from each other, the mechanism for relatively moving the first roll 43 and the second roll 44 is complicated. Can be reduced. In addition, it is possible to increase the size of parts used in each adjusting machine, and to improve the durability of the device.

  (9) The web thickness adjuster 65 converts the movement amount of the unit support member 70 in the left-right direction into the movement amount of the first roll unit 66 in the vertical direction using the inclined surface 69 a and the support surface 70 a. ing. According to such a configuration, the amount of movement of the first roll 43 in the vertical direction is defined by the amount of movement of the unit support member 70 in the left and right direction different from the vertical direction. Thus, the amount of movement of the first roll 43 can be reduced. As a result, the moving amount of the first roll 43 in the vertical direction can be controlled with high accuracy. These effects are more remarkable as the inclination angle of the inclined surface 69a in the moving direction of the unit support member 70 is smaller.

  (10) The power transmission mechanism 100 has a first idle gear 106 and a second idle gear 107 as an intermediate transmission mechanism for transmitting power between the first drive gear 104 and the second drive gear 105. . The central axis 106a of the first idle gear 106 is set at the same position in the vertical direction as the central axis 104a of the first drive gear 104, that is, at the same height, when the first roll 43 is positioned at the central position. ing. According to this configuration, it is possible to reduce the amount of change in the center distance between the first drive gear 104 and the first idle gear 106 when the first roll 43 is moved in the vertical direction. As a result, reliable power transmission can be performed between the first idle gear 106 and the first drive gear 104.

  (11) In the hydraulic cylinder 73, at the time of molding of the frame 13, a holding hydraulic pressure is supplied in which the expansion and contraction amount of the expansion and contraction rod 75 is held at the expansion and contraction amount at the start of molding. Therefore, even if the hydraulic cylinder 73 tries to displace the first roll unit 66 upward by a force acting to displace the first roll 43 upward as a reaction force accompanying molding, the displacement can be suppressed. . As a result, it is possible to suppress a change in web thickness ta at the time of molding.

In addition, the said embodiment can also be changed suitably as follows and can also be implemented.
The upper and lower motive units for moving the first roll unit 66 up and down, and the displacement suppressor that suppresses the upward displacement of the first roll 43 are not limited to the hydraulic cylinder 73, and may be, for example, an air cylinder. For example, an electric cylinder using a servomotor may be used. In addition, the frame forming apparatus 10 may be configured to have the upper and lower motive devices and the displacement suppressor separately. Further, the frame forming apparatus 10 may not have the displacement suppressor.

  The intermediate transmission mechanism configured by the first idle gear 106 and the second idle gear 107 is not limited to the transmission of power between the first and second rolls 43 and 44 adjacent in the forming direction, It may be provided for each upper and lower roll pair configured with the second roll 44.

  In the intermediate transmission mechanism, the first idle gear 106 may transmit power between the second idle gear 107 and the first drive gear 104. Therefore, in the first idle gear 106, for example, a first large diameter gear for transmitting power with the second idle gear 107 and a first small diameter gear for transmitting power to the first drive gear 104 are The gears may be arranged side by side in a direction, and the gears may rotate on the same central axis extending in the left-right direction. Similarly, the second idle gear 107 only needs to be able to transmit power between the first idle gear 106 and the second drive gear 105. Therefore, the second idle gear 107 is, for example, a second large diameter gear that transmits power with the first idle gear 106 and a second small diameter gear that transmits power between the second drive gear 105. They may be arranged side by side in the left-right direction, and these gears may be configured to rotate on the same central axis extending in the left-right direction. By configuring the idle gear by the large diameter gear and the small diameter gear, the degree of freedom in the arrangement of the first drive gear 104 and the arrangement of the second drive gear 105 is improved.

  -In the intermediate transmission mechanism, by forming the first and second idle gears 106 and 107 with the large diameter gear and the small diameter gear, the distance between the adjacent upper and lower roll pairs in the forming direction can be reduced. . As a result, space saving of the frame molding apparatus 10 can be achieved.

  The first idle gear 106 may be configured such that the central shaft 106 a is positioned at the same height as the central shaft 104 a of the first drive gear 104 located at the lower limit position. Further, the first idle gear 106 may be configured to move up and down so that the central shaft 106 a is maintained at the same height as the central shaft 104 a of the first drive gear 104.

  In the web thickness adjuster 65, the movement amount of the first roll 43 in the vertical direction is defined by the movement amount of the unit support member 70 in the orthogonal direction orthogonal to the vertical direction. Not limited to such a configuration, the web thickness adjuster 65 may be configured such that the moving amount of the first roll 43 in the vertical direction is defined by the moving amount of the first roll unit 66 by the up and down motive force. In addition, the first roll 43 may be moved in the vertical direction by the movement of the unit support member 70.

  The web thickness adjuster 65 is not limited to moving the first roll 43 in the vertical direction with respect to the stand 42, but at least one of the first roll 43 and the second roll 44 with respect to the stand 42 in the vertical direction. Any configuration may be used as long as it is moved. Further, the flange thickness adjuster 80 is not limited to the configuration in which the second roll 44 is moved in the left-right direction with respect to the stand 42, and at least one of the first roll 43 and the second roll 44 with respect to the stand 42 in the left-right direction. It may be configured to be moved to.

The pair of left and right stands 42 may be configured to have only one upper and lower roll pair.
The web width adjustment device 50 may move the pair of left and right stands 42 relative to each other in the left and right direction. For example, only the other stand 42 may be moved in the left and right direction with reference to one stand 42 .

  DESCRIPTION OF SYMBOLS 10 Frame forming apparatus 12 base material 13 frame 15 loading machine 25 unloading machine 30 roll forming machine 41 forming unit 42 stand 44 first roll 44 second Roll, 45: Roll group, 50: Web width adjustment machine, 65: Web thickness adjustment machine, 80: Flange thickness adjustment machine, 100: Power transmission mechanism.

Claims (6)

A frame forming apparatus for forming a flat base material into a grooved frame having a web and flanges integrally connected to both ends of the web, comprising:
The frame forming apparatus is
Each of a pair of left and right stands opposite to each other in the left and right direction rotatably supports the first roll and the second roll positioned below the first roll with the left and right direction as a central axis, The roll forming apparatus is a roll forming apparatus in which a roll group is configured by the second rolls facing each other in the left-right direction, and the roll group is arranged in the forming direction.
A web width adjuster for relatively moving the pair of left and right stands in the left and right direction;
A web thickness adjuster for relatively moving the first roll and the second roll in the vertical direction in each of the pair of left and right stands;
A frame forming apparatus comprising: a flange thickness adjuster for relatively moving the first roll and the second roll in the left-right direction in each of the pair of left and right stands. The frame forming apparatus according to claim 1, wherein the web width adjustment machine moves the pair of left and right stands in opposite directions by the same amount of movement when the pair of left and right stands move relative to each other. The frame forming apparatus according to claim 1, wherein each of the pair of left and right stands supports a plurality of upper and lower roll pairs configured by the first roll and the second roll. The web thickness adjuster moves the first roll in the vertical direction with respect to the stand,
The frame forming apparatus according to any one of claims 1 to 3, wherein the flange thickness adjuster moves the second roll relative to the stand in the left-right direction. The web thickness adjuster is
A first roll unit mounted movably in the vertical direction with respect to the stand to rotatably support the first roll, and having an inclined surface that is inclined with respect to the orthogonal direction orthogonal to the vertical direction The first roll unit;
A unit support member mounted so as to be movable in the orthogonal direction with respect to the stand and supporting the first roll unit in surface contact with the inclined surface;
The frame forming apparatus according to claim 4, wherein an amount of movement of the first roll unit in the vertical direction is defined by an amount of movement of the unit support member in the orthogonal direction. Each of the pair of left and right stands is
A transmission mechanism for transmitting power between a first drive gear for driving the first roll and a second drive gear for driving the second roll,
The transmission mechanism is
A first idle gear rotatably supported on the stand with the lateral direction as a central axis and meshed with the first drive gear;
And a second idle gear rotatably supported on the stand with the left and right direction as a central axis and meshed with the first idle gear and the second drive gear.
When the first roll is positioned at the central position of the movement range in the vertical direction, the central axis of the first drive gear and the central axis of the first idle gear are positioned at the same height. The frame forming apparatus according to 4 or 5.

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