JP3705054B2 - Hemming processing apparatus and hemming processing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hemming processing apparatus and a hemming processing method. For example, when hemming a door outer panel and a door inner panel forming a door panel of an automobile at the peripheral portion thereof, The present invention relates to a subsequent table bending type (hemming) or a so-called table top type hemming apparatus for performing any one of them and a hemming method using the apparatus.
[0002]
[Prior art]
An example of this type of hemming apparatus is described in US Pat. No. 5,150,508.
[0003]
FIG. 6 shows an outline of this. In the work loading / unloading position 100, the panels Pa and Pb are set on the cradle 52 of the lifter 51, the cradle 52 is lowered, and the panel Pa. Pb is transferred onto a lower mold 53 including a base 54 and a nest block 55. Next, by extending the lift cylinder 56, the panels Pa and Pb are raised together with the lower mold 53, and the panels Pa and Pb are put on standby at the pre-hemming processing position 200. In this state, the pre-hemming die 57 is moved by the cylinder 58. Operate forward. Then, the panel Pa and Pb are slightly pushed up together with the nest block 55 by the press cylinder 59 with respect to the pre-hemming die 57 at the advanced position, so that the hemming flange is formed upright in advance at the peripheral edge of one panel Pa. Pre-bending is applied to the part F.
[0004]
Thereafter, the panels Pa and Pb are once lowered by the reverse operation of the press cylinder 59, and the pre-hemming die 57 is also retracted by the reverse operation of the cylinder 58. Further, the panels Pa and Pb are hemmed together with the lower die 53 by the lift cylinder 56. Lower to 300. In this state, the hemming die 60 is moved forward, and the panels Pa and Pb are slightly pushed up together with the nest block 55 by the press cylinder 59 with respect to the hemming die 60 in the advanced position, so that preliminary bending is performed first. The bending process is applied to the hemming flange F.
[0005]
The panels Pa and Pb that have been subjected to hemming are pushed up to the workpiece loading / unloading position 100 again by the cradle 52 of the lifter 51 after waiting for the hemming die 60 and the nest block 55 to return to the initial state.
[0006]
[Problems to be solved by the invention]
In such a conventional structure, the pre-hemming die 57 and the hemming die 60 which are independent from each other are arranged so as to overlap each other in the vertical direction, so that the occupied space in the height direction becomes large and the panel Pa , Pb ascending / descending operation is also separated into a lift cylinder 56 and a press cylinder 59 in addition to the lifter 51, which is not preferable because the number of cylinders is large and the structure becomes complicated. Further, since the lifting and lowering operations of the panels Pa and Pb are performed in two stages each time by the operation by the lift cylinder 56 and the operation by the press cylinder 59 for each of the preliminary bending process and the main bending process, the cycle time becomes longer. Not only that, the panels Pa and Pb are liable to be displaced on the lower mold 53, and the height of the entire apparatus is increased particularly by increasing the lifting stroke as described above, thereby increasing the size of the entire apparatus. The result will be forced.
[0007]
The present invention has been made paying attention to the above-described problems, and it is an object of the present invention to provide a hemming processing apparatus and a hemming processing method capable of achieving the intended object with a particularly simple configuration.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a hemming processing apparatus for hemming and joining at least two panels that are overlapped with each other, and is provided with a base member and a vertically movable on the base member so that hemming is performed on the upper surface. A lower mold on which the target panel is positioned and mounted, and a hemming blade is provided in a portion that is supported by the base member via the rotation shaft and is positioned above the lower mold. A swing frame that swings about the rotation axis between a machining position facing the mold and a retreat position in which the hemming blade is retreated from above the lower mold, and one end of the swing frame at a position below the lower mold And a linear motion actuator having the other end connected to the lower mold.
[0009]
The swing frame is moved by the operation of the linear actuator. Without the lower mold ascending After the swing frame is moved from the retracted position to the machining position and the swing frame is positioned at the machining position, the linear motion type actuator continues to operate so that the lower mold moves up and the hemming machining blade and the lower mold are moved. It is characterized in that hemming is performed by cooperation.
[0010]
The hemming process mentioned here refers to either the pre-bending process or the main bending process described above. Therefore, in the pre-bending process, the hemming blade becomes a pre-bending blade, and conversely the main bending process. In this case, the hemming blade is a main bending blade.
[0011]
In addition, the swing motion of the swing frame from the retracted position to the machining position and the lower die lifting operation are not performed in parallel, and the swing frame is always positioned at the machining position prior to the lower die lifting operation. It is assumed that
[0012]
As the direct acting actuator, for example, a trunnion type hydraulic cylinder or air cylinder is used.
[0013]
Therefore, according to the first aspect of the present invention, the swing frame is moved by the operation of the linear actuator while the panel to be hemmed is positioned on the lower mold. Without the lower mold ascending It swings and displaces from the retracted position to the machining position and is positioned at that position. In this state, the hemming blade comes to face the lower mold. Then, even after the swing frame is positioned at the machining position as described above, the linear motion type actuator is continuously operated, and the panel is raised together with the lower mold with respect to the hemming machining blade at the lower mold facing position. As a result, the hemming flange is bent and hemming is performed.
[0014]
That is, according to the first aspect of the present invention, the swinging movement of the swing frame from the retracted position to the machining position and the hemming machining operation, which is the lower die raising operation at the machining position, are performed in a single linear motion. This is done based on the continuous operation of the mold actuator.
[0015]
In the invention according to claim 2, when hemming at least two panels overlapped with each other, the hemming flange portion that is formed upright in advance at the end portion of any panel has a predetermined inclination angle. A hemming apparatus for performing a pre-bending process and a main bending process following the pre-bending process, wherein a base member and a panel to be hemmed on an upper surface provided on the base member so as to be vertically movable are provided. A lower mold that is positioned and placed; a swing frame that is swingably supported by the base member via a rotation shaft; and a portion of the swing frame that is positioned above the lower mold is slidable, A processing blade unit is formed by integrally forming a pre-bending blade and a main bending blade that are positioned differently in the horizontal direction and the height direction so as to be close to each other. And one end of the swing frame is connected to a position below the lower die and the other end is connected to the lower die, and the machining position where the machining blade unit faces the lower die and the machining blade unit are A direct acting actuator that swings the swing frame about the rotation axis as a rotation center between the retraction position retracted from above the mold, and a position facing the lower mold during the preliminary bending process and the main bending process. Slide driving means for slidingly moving the processing blade unit with respect to the swing frame under a predetermined slide stroke so as to selectively switch the position of the pre-bending blade or the main bending blade to be indexed.
[0016]
The swing frame is moved by the operation of the linear actuator. Without the lower mold ascending The pre-bending blade that swings and moves from the retracted position to the machining position, and after the swing frame is positioned at the machining position, the linear motion type actuator continues to operate so that the lower mold moves up and is in the directly facing position. Pre-bending is performed in cooperation with the lower die, and after lowering the lower die once following this pre-bending, the lower die is again attached to the main bending blade indexed to the facing position. It is characterized in that the main bending process is performed by the cooperation of the main bending blade and the lower die by the upward movement.
[0017]
Also in the invention according to the second aspect, the swing motion of the swing frame from the retracted position to the machining position and the lower mold lifting operation are not performed simultaneously and always precede the lower mold lifting operation. It is assumed that the swing frame is positioned at the processing position. As the direct acting actuator, for example, a trunnion type hydraulic cylinder or air cylinder is used.
[0018]
Therefore, in the invention according to the second aspect, the swing frame is mounted in a state where the panel to be hemmed is positioned on the lower mold. Without the lower mold ascending The entire processing blade unit is slid relative to the slide frame so that the pre-bending blade faces the lower mold while swinging and displacing from the retracted position to the processing position. Then, by raising the panel together with the lower die with respect to the preliminary bending blade in the lower die facing position, the hemming flange portion that has been in an upright state is bent up to about 45 degrees and preliminarily bent. Is done. In this case, the sliding movement of the processing blade unit slides not only to the pre-bending blade but also to the main bending blade, but the pre-bending blade and the main bending blade that are integrally formed with each other are mutually in the horizontal and vertical directions. Since the position is shifted, the bending blade does not contact the hemming flange portion at the time of preliminary bending and does not function at all.
[0019]
After this preliminary bending process is completed, the panel is lowered once with the lower mold, and then the processing blade unit is slid so that the main bending blade faces the lower mold. By raising the panel together with the lower mold again, the main bending process is performed on the hemming flange part that has been subjected to the preliminary bending process, and the panels are hemmed. Also in this case, the sliding movement of the machining blade unit slides not only to the main bending blade but also to the pre-bending blade. As described above, the pre-bending blade and the main bending blade formed integrally with each other are Since the positions are shifted from each other in the horizontal direction and the vertical direction, the preliminary bending blade does not contact the hemming flange portion at the time of the final bending process and does not function at all.
[0020]
That is, in the invention according to the second aspect, in both the preliminary bending process and the main bending process, the lower mold is moved up and down by one reciprocation each time with respect to the swing frame positioned at the processing position. Processing is performed at.
[0021]
According to a third aspect of the present invention, when the lower mold is lifted while the swing frame in the invention of the first or second aspect is in the processing position, the lower mold or a portion that moves up other than the lower mold And a part of the swing frame are engaged with each other to restrain the swing frame so as not to swing.
[0022]
Therefore, in the invention according to the third aspect, when the lower mold moves upward with respect to the swing frame at the processing position, relative positioning in a direction other than the vertical direction is performed by mechanical engagement of the two, and hemming Even if the swing frame receives a processing reaction force during processing, that is, during pre-bending processing or main bending processing, the swing frame does not oscillate and is securely positioned and held at the processing position. Compensates the relative positioning of the pre-bending blade or the main bending blade as the blade unit and the lower die.
[0023]
According to a fourth aspect of the invention, an auxiliary actuator is provided separately from the direct acting actuator according to any of the first to third aspects of the invention, and the auxiliary actuator swings by the operation of the direct acting actuator. When the frame is swung from the retracted position to the machining position, the lower mold is prevented from moving up, while when the lower frame is moved up after the swing frame is positioned at the machining position, the direct acting actuator is used. It is characterized in that the lower mold is positively moved up.
[0024]
As the auxiliary actuator according to the fourth aspect of the present invention, a hydraulic cylinder or an air cylinder is used as described above.
[0025]
Therefore, in the invention described in claim 4, it is assumed that the swing frame is always positioned at the machining position prior to the raising operation of the lower die as in the invention described in any one of claims 1-3. When the swing frame swings, the auxiliary actuator acts as a lock actuator (lock cylinder) that prevents simultaneous lowering of the lower mold. Compensate to be positioned at the machining position. On the other hand, when the lower die is moved up during the pre-bending process or the main bending process, which is a hemming process, the auxiliary actuator functions as an assist actuator (assist cylinder), and the lower mold is positively combined with the direct acting actuator. Will move up.
[0026]
According to a fifth aspect of the present invention, there is provided a method of hemming and coupling at least two panels that are overlapped with each other by a hemming apparatus, the hemming apparatus being provided on a base member so as to be movable up and down. The lower die on which the panel to be hemmed is positioned and mounted, and the hemming blade is provided in a portion that is supported by the base member via the rotating shaft and positioned above the lower die. A swing frame that swings about the rotation axis between the machining position where the blade faces the lower mold and the retreat position where the hemming blade is retracted from above the lower mold; and below the lower mold of the swing frames It is assumed that a linear motion actuator having one end connected to the position and the other end connected to the lower mold is provided.
[0027]
Then, the swing frame is moved by the operation of the direct acting actuator. Without the lower mold ascending After the swing frame is moved from the retracted position to the machining position and then the swing frame is positioned at the machining position, the linear motion type actuator is further operated to move the lower mold upward and It is characterized in that hemming is performed by the cooperation of the opposing hemming blade and the lower die.
[0028]
Therefore, in the invention described in claim 5, as in the invention described in claim 1, the swing frame is actuated by the operation of the direct acting actuator while the panel to be hemmed is positioned on the lower mold. The Without the lower mold ascending It swings and displaces from the retracted position to the machining position and is positioned at that position. In this state, the hemming blade is directly facing the lower die, and the linear motion actuator is continuously operated after the swing frame is positioned at the machining position as described above, so that it is at the lower die facing position. The hemming flange is bent and the hemming process is performed by raising the panel together with the lower mold with respect to the hemming blade.
[0029]
【The invention's effect】
According to the first and fifth aspects of the present invention, it is assumed that the swinging motion of the swing frame and the lower die lifting operation are performed based on the continuous operation of a single direct acting actuator. Since the lower die is lifted for the first time after the position is positioned at the machining position, hemming is performed, so that the overall lifting and lowering stroke of the lower die can be reduced, and the entire apparatus can be reduced in size and particularly its height dimension can be reduced. In addition, the number of required actuators can be reduced to simplify the overall structure of the device, and the cycle time can be shortened by reducing the lifting stroke of the lower mold, resulting in panel misalignment. There is an effect of preventing the processing accuracy from being lowered.
[0030]
In particular, according to the second aspect of the invention, when the swing frame is positioned at the machining position, the lower die is reciprocated once while selectively switching between the pre-bending blade and the main bending blade by the sliding operation of the machining blade unit. Pre-bending and subsequent main bending are performed simply by raising and lowering each step, and the pre-bending blade and the main bending blade are integrally formed as a processing blade unit, but their positions in the horizontal direction and the height direction are also formed. Since the vertical movement of the lower mold can be further reduced, the entire apparatus can be greatly reduced in size, and the cycle time can be further shortened while the preliminary bending process and the main bending process are continuously performed. effective.
[0031]
According to the third aspect of the present invention, when the lower mold moves upward with respect to the swing frame at the processing position, both engage with each other so that the swing frame is restrained from swinging. In addition to the same effect as that of the first or second aspect of the invention, there is an effect that the relative positional accuracy of the both can be increased.
[0032]
According to the fourth aspect of the present invention, when the swing frame is swung to the machining position, the auxiliary actuator provided separately from the direct acting actuator prevents the lower mold from moving in parallel. On the other hand, when the lower mold moves up, it functions as an assist actuator and actively assists the lower mold ascending, so the swing frame and lower mold move smoothly and quickly. And the effect of relatively reducing the capacity of the direct acting actuator.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 5 are views showing a preferred embodiment of a hemming apparatus according to the present invention. FIG. 1 shows a state when a panel to be hemmed is inserted and removed, and FIG. FIG. 3 shows a state immediately before the start, FIG. 3 shows a state immediately before the start of the main bending process, and FIG. 5 shows an enlarged view of the shape change of the hemming flange portion accompanying the preliminary bending process and the main bending process. In the present embodiment, an example of a hemming apparatus for hemming the door outer panel Pa and the door inner panel Pb forming the door panel D of the automobile is shown.
[0034]
As shown in FIG. 1, the hemming apparatus is roughly divided into a lifter 2 installed on a gantry 1 as a base member, and a swing frame 3 which is also on the gantry 1 and is installed around the lifter 2. It is configured.
[0035]
The lifter 2 is formed around a horizontal lifter table 5 having a lower mold 4 fixed on the upper surface. The door outer panel Pa and the door inner panel Pb are superimposed on the lower mold 4 before the hemming connection. The door panel D is put in and positioned by a handling robot or the like not shown in the form shown in FIG. Below the lifter table 5, a guide mechanism 9 including a vertical guide rod 6 and a guide sleeve 8 in which the guide rod 6 is slidably inserted via a guide bush 7 is provided. The lifter table 5 is connected to the upper end of the.
[0036]
Further, a trunnion type swing cylinder (hydraulic cylinder) 10 is provided as a linear actuator for lifting and lowering operation so as to be adjacent to the guide mechanism 9, and the piston rod 11 of the swing cylinder 10 is connected via a pin 12. Are connected to the lower surface of the lifter table 5. That is, the lifter 2 includes a lifter table 5, a guide mechanism 9 and a swing cylinder 10, and the lifter table 5 is guided by the guide mechanism 9 when the swing cylinder 10 extends and contracts under a predetermined stroke. However, it moves up and down while maintaining the horizontal state. The swing cylinder 10 also serves as an actuator for swinging the swing frame 3 as will be described later.
[0037]
An assist cylinder (hydraulic cylinder) 13 is erected on the mount 1 as an auxiliary actuator so as to be adjacent to the guide mechanism 9 separately from the swing cylinder 10, and the piston rod 14 of the assist cylinder 13 is connected to the lifter table 5. It is connected to. The assist cylinder 13 is a lock that temporarily prevents the lifter table 5 from being lifted when the swing cylinder 10 is extended when the swing frame 3 is swung by the extension operation of the swing cylinder 10 as will be described later. On the other hand, when the lifter table 5 is lifted alone by the extension operation of the swing cylinder 10, the assist cylinder 13 has a function of positively pushing up the lifter table 5 together with the swing cylinder 10. ing.
[0038]
Further, a stopper guide 17 is provided on the outside of the lower mold 4 of the lifter table 5 together with a concave groove block 16 that is to be engaged with the positioning pin 15 on the swing frame 3 side. By engaging with the stopper 25 on the swing frame 3 side, the lower mold 4 that is directly involved in the hemming process and the relative positioning of the pre-bending blade 26 or the main bending blade 27 described later are governed.
[0039]
The swing frame 3 has a substantially C-shaped frame structure, and rotates horizontally with respect to the hinge bracket 18 provided on the gantry 1 so as to receive the peripheral portion of the lifter table 5 in the C-shaped space. A hinge pin 19 as a shaft is supported so as to be swingable. The position of the hinge pin 19 is set at a position below the lifter table 5 at the lowest position. At the lower end of the swing frame 3, a trunnion-type swing cylinder 10 that serves as the swing actuator for the swing frame 3 and the lift actuator for the lifter 2 described above can swing via a pin 10a. The swing frame 3 swings between an inclined posture position P1 which is a retracted position and an upright posture position P2 as a machining position shown in FIG. When the swing frame 3 is positioned at the upright posture position P2 by the contact between the stopper 20 and the stopper bracket 21 on the gantry 1, the swing cylinder 10 is also set to be in the upright posture. Yes.
[0040]
A slider 23 is attached to the upper end portion of the swing frame 3 via a slide guide 22, and this slider 23 is extended and contracted by a slide cylinder (hydraulic cylinder) 34 as a slide drive means provided on the swing frame 3. According to the slide operation. The processing blade unit 24 and the stopper 25 are fixed to the slider 23 so as to be adjacent to each other.
[0041]
As shown in FIG. 4, the processing blade unit 24 has a pre-bending blade 26 as a hemming processing blade which is a forming surface inclined at about 45 degrees, and also has a substantially flat forming surface as a hemming processing blade. The bending blade 27 is integrally formed so as to be adjacent to each other. The preliminary bending blade 26 and the main bending blade 27 are formed so as to be shifted from each other in the horizontal direction and the vertical direction while being adjacent to each other.
[0042]
Further, a stopper projection 28 is formed integrally with the stopper 25 fixed to the slider 23 so as to face downward. On the other hand, a stopper guide 17 is attached to the lifter table 5, and two stopper recesses 29 and 30 corresponding to the stopper protrusion 28 are formed adjacent to the stopper guide 17. As will be described later, when the pre-bending process is performed, the stopper convex portion 28 and one stopper concave portion 29 are engaged with each other, whereby the pre-bending blade 26 and the lower mold 4 are relatively positioned. And the other stopper recess 30 mesh with each other so that the relative positioning of the main bending blade 27 and the lower mold 4 is achieved.
[0043]
Therefore, according to the hemming apparatus thus formed, as shown in FIG. 1, the swing frame 3 is in the inclined posture position (retracted position) P1, and the lifter table 5 of the lifter 2 is the end on the guide mechanism 9 side. The door panel D in which the outer panel Pa and the inner panel Pb are overlapped is placed on the lower mold 4 and positioned by a handling robot or the like (not shown) in the state of being in the lowest lowered position in contact with the plate 31. The door panel D on the lower mold 4 is pressed and fixed or clamped by a pad or a clamper (not shown). Further, as shown in FIG. 5A, a hemming flange portion F is formed upright at the peripheral portion of the outer panel Pa in advance.
[0044]
When the door panel D is positioned on the lower mold 4, as shown in FIG. 2, the swing cylinder 10 extends to swing the swing frame 3 to the upright posture position P2, which is the processing position. At this time, the lifter table 5 is pushed up simultaneously with the extension displacement of the swing cylinder 10, but when the swing cylinder 10 is extended, a hydraulic pressure is applied to the assist cylinder 13 to positively contract it. As a result, the lift of the lifter table 5 can be prevented, and as a result, the assist cylinder 13 functions as a lock cylinder that prevents the lifter table 5 from moving up due to the swinging motion of the swing frame 3. The upright posture position P2 of the swing frame 3 is regulated by contact between the stopper 20 on the swing frame 3 side and the stopper bracket 21 on the gantry 1 side. As a result, the pre-bending blade 26 is positioned so as to face the lower mold 4 almost at the same time, and at the same time, the positioning pin 15 and the groove block 16 on the swing frame 3 side are aligned with each other in the vertical direction.
[0045]
In this state, the swing cylinder 10 still extends to push up the lifter table 5 by a predetermined stroke S1, and the lower die 4 backs up the hemming flange F on the peripheral edge of the outer panel Pa as shown in FIG. While pressing against the pre-bending blade 26, the hemming flange portion F is bent from its root portion until an inclination angle of about 45 degrees is applied and pre-bending is performed.
[0046]
At this time, not only the swing cylinder 10 but also the assist cylinder 13 that has been functioning as a lock cylinder so far extends and actively assists the lifting operation of the lifter table 5. Further, as the lifter table 5 is raised, the concave groove block 16 on the lifter table 5 side and the positioning pin 15 on the swing frame 3 side are engaged with each other, and the return phenomenon of the swing frame 3 to the inclined posture position P1 side. On the other hand, the stopper convex portion 28 and the one stopper concave portion 29 are meshed with each other so that they are in a bottomed state, and relative positioning in the vertical and horizontal directions between the preliminary bending blade 26 and the lower mold 4 is performed. Do. Thus, direct contact between the pre-bending blade 26 and the lower mold 4 is avoided, and the component force in the lateral direction among the processing reaction force from the door panel D accompanying the pre-bending process is caused by the stopper 25 and the stopper guide 17. Take it. When the preliminary bending process is completed, the lifter table 5 is lowered again by the stroke S1 based on the contraction operation of the swing cylinder 10 and the assist cylinder 13, and returns to the lowest position shown in FIG.
[0047]
When the lifter table 5 once returns to the lowest position as described above, the slider 23 slides further to the right by the stroke S3 by the extension operation of the slide cylinder 24 as shown in FIG. Thus, the main bending blade 27 is positioned so as to face the lower mold 4. In this state, the swing cylinder 10 and the assist cylinder 13 extend again to push up the lifter table 5 by a predetermined stroke S2, and a hemming flange portion that has been subjected to preliminary bending as shown in FIG. Crush F until it becomes flat and perform the main bending process.
[0048]
Also at this time, the positioning pin 15 on the swing frame 3 side and the concave groove block 16 on the lifter table 5 side are engaged with each other, and the stopper convex portion 28 and the other stopper concave portion 30 are engaged with each other. Relative positioning is performed only between the left and right molds 4 and the lower mold 4. Thus, the main bending blade 27 and the lower mold 4 are positively allowed to contact indirectly via the hemming portion, and the main bending processing for the hemming flange portion F is made more reliable.
[0049]
When the main bending process is thus completed, the lifter table 5 is lowered again by the stroke S2 based on the contraction operation of the swing cylinder 10 and the assist cylinder 13, and returns to the state shown in FIG. 24 also returns to the original state, and the swing frame 3 returns to the inclined posture position P1 shown in FIG. 1 by further contraction operation of the swing cylinder 10 after the lifter table 5 stops at the lowest position. Then, the door panel D after the completion of the hemming process is taken out by a handling robot or the like (not shown), and one cycle for the hemming process is completed.
[0050]
As described above, according to the present embodiment, the slide operation (shift operation) of the processing blade unit 24 in the state where the swing frame 3 is in the upright posture position P2, which is the processing position, and the pre-bending process and the bending process are performed. By a combination of extremely simple movements of up and down movement of the reciprocating lifter table 5, the preliminary bending process for hemming and the subsequent main bending process can be smoothly performed in a short cycle time.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a preferred embodiment of a hemming apparatus according to the present invention, and is a configuration explanatory diagram illustrating a state in which a door panel to be hemmed is inserted.
2 is an explanatory diagram of the configuration when the swing frame swings from the state of FIG. 1 to an upright posture position. FIG.
3 is an explanatory diagram of the configuration when the machining blade unit is slid by a stroke S3 from the state of FIG. 2. FIG.
4 is an enlarged view of a main part of FIG.
FIG. 5 is an enlarged explanatory view showing a shape change of a hemming flange portion.
FIG. 6 is a configuration explanatory view showing an example of a conventional hemming apparatus.
[Explanation of symbols]
1 ... Stand (base member)
2 ... Lifter
3 ... Swing frame
4 ... Lower mold
5 ... Lifter table
10 ... Swing cylinder (Direct acting actuator)
13 ... Assist cylinder (auxiliary actuator)
15 ... Positioning pin
16 ... Dove groove block
17 ... Stopper guide
19 ... Hinge pin (rotating shaft)
23 ... Slider
24 ... Processing blade unit
25 ... Stopper
26 ... Preliminary bending blade
27 ... This bending blade
28: Stopper convex part
29, 30 ... Stopper recess
34 ... Slide cylinder (slide drive means)
D ... Door panel
F ... Hemming flange
P1: Inclined posture position (retracted position)
P2: Upright posture position (processing position)
Pa ... Door outer panel
Pb ... Door inner panel

Claims (5)

A hemming processing apparatus for hemming and bonding at least two panels superposed on each other,
A base member;
A lower mold that is provided on the base member so as to be movable up and down and on which the panel to be hemmed is positioned and placed;
A hemming blade is provided at a portion that is supported by the base member via a rotating shaft and is positioned above the lower die, and a processing position where the hemming blade faces the lower die and the hemming blade is located above the lower die. A swing frame that swings about the rotation axis between the retraction position and the retraction position retracted from
A linear motion actuator having one end connected to a position below the lower mold of the swing frame and the other end connected to the lower mold;
With
By operating the linear actuator, the swing frame swings from the retracted position to the machining position without causing the lower mold to move up. After the swing frame is positioned at the machining position, the linear actuator further operates. The hemming processing apparatus is characterized in that the lower die is moved upward by continuing to perform hemming by the cooperation of the hemming blade and the lower die. When hemming at least two panels that are overlapped with each other, pre-bending is performed until the hemming flange portion, which is formed upright at the end of one of the panels in advance, has a predetermined inclination angle. A hemming processing device that performs a main bending process following the processing,
A base member;
A lower mold that is provided on the base member so as to be movable up and down and on which the panel to be hemmed is positioned and placed;
A swing frame supported on the base member so as to be swingable via a rotation shaft;
The swing frame is slidably provided in the upper part of the lower mold, and the pre-bending blade and the main bending blade, which are located in different positions in the horizontal and height directions, are integrated so as to be close to each other. A processing blade unit that is formed automatically,
One end of the swing frame is connected to a position below the lower die and the other end is connected to the lower die. The machining blade unit faces the lower die and the machining blade unit is located above the lower die. A direct acting actuator that swings the swing frame around the rotation axis between the retraction position and the retraction position retracted from
In order to selectively switch the position of the pre-bending blade or the main bending blade that is indexed to the position facing the lower mold during the pre-bending process and the main bending process, the processing blade unit is moved under a predetermined slide stroke. Slide drive means for sliding relative to the swing frame;
With
By operating the linear actuator, the swing frame swings from the retracted position to the machining position without causing the lower mold to move up. After the swing frame is positioned at the machining position, the linear actuator further operates. The lower mold is moved up by continuing the pre-bending process by the cooperation of the preliminary bending blade and the lower mold at the above-mentioned facing position,
Further, following the preliminary bending, the lower die is once lowered, and then the lower die is raised again with respect to the main bending blade indexed at the directly facing position, whereby the cooperation between the main bending blade and the lower die is achieved. A hemming apparatus characterized in that the main bending process is performed by operation. When the lower mold is lifted while the swing frame is in the processing position, the lower mold or a part of the lifting movement other than the lower mold and a part of the swing frame engage with each other to swing. 3. The hemming apparatus according to claim 1, wherein the frame is restrained so as not to swing. An auxiliary actuator is provided in addition to the linear actuator, and this auxiliary actuator prevents the lower mold from being raised when the swing frame is swung from the retracted position to the machining position by the operation of the linear actuator. On the other hand, when the lower mold is moved up after the swing frame is positioned at the machining position, the lower mold is positively moved up together with the direct acting actuator. The hemming processing apparatus according to any one of Items 1 to 3. A method of hemming at least two panels stacked on each other with a hemming processing apparatus,
The hemming apparatus is
A lower mold that is provided on the base member so as to be movable up and down and on which the panel to be hemmed is positioned and placed;
A hemming blade is provided at a portion that is supported by the base member via a rotating shaft and is positioned above the lower die, and a processing position where the hemming blade faces the lower die and the hemming blade is located above the lower die. A swing frame that swings about the rotation axis between the retraction position and the retraction position retracted from
A linear motion actuator having one end connected to a position below the lower mold of the swing frame and the other end connected to the lower mold;
With
By swinging the swing frame from the retracted position to the machining position without the lower mold ascending by the operation of the direct acting actuator,
Next, even after the swing frame is positioned at the machining position, the lower die is moved upward by further operating the linear actuator.
A hemming method, wherein hemming is performed by cooperation of a hemming blade and a lower die facing each other at the facing position.

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