The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.
 The present invention will be further described below in conjunction with the drawings and embodiments:
 Such as image 3 As shown in —6, a press-bending forming device for the C-pillar of the rear door of an automobile door frame includes an upper block 1 and a lower block 2. The upper block 1 and the lower block 2 are combined to press the front end of the C-pillar In a predetermined shape, the upper block 1 is rotatably installed above the lower block 2 through a hinge structure, and the hinge structure is caused by the upper block 1 moving downward to contact with the C-pillar or the lower block 2 to be bent. Drive the upper block 1 to follow the bending trend of the front section of the tip to rotate downward; that is, when the upper block 1 is pressed down, the upper block 1 and the lower block 2 on the C-pillar front section of the end contact start to adaptively occur Rotate, or start to rotate when it is in contact with the lower block 2, so that the trajectory of the upper block 1's rotation follows the bending direction of the front section of the C-pillar end, thereby punching the C-pillar between the upper and lower blocks in the vertical direction Established shape. In addition, this embodiment also includes a transverse feed mechanism, which drives the side pushing mechanism 3 to squeeze the door frame to make the front end of the end bend transversely into a predetermined arc. The side pushing mechanism 3 may be a stamping slider that can move toward the C-pillar. In actual processing, the two can be driven by the same component, that is, when the upper block 1 is pressed down, the side pushing mechanism 3 also moves toward the C-pillar lateral bending direction, and finally when the two move into place, the upper and lower block and the side pushing mechanism 3 Press and bend the front section of the end of the C-pillar. Compared with the traditional direct press forming of upper and lower blocks moving in the vertical direction, a large number of wrinkles and depressions will not appear on the curved inner arc surface, which ensures the press forming quality of the C-pillar.
 In specific implementation, for the above-mentioned lower block 2, such as image 3 As shown, it is preferable to process a convex arc surface on the right side on the lower block 2, and the surface where the upper block 1 contacts and fits with the arc surface is a smooth flat surface. 1 The front end of the end is the front end, and the upper block 1 is hinged at the front end by the hinge structure, and above the rear end is provided with a restricting rear end to lift and rotate upward Stopper, this stopper makes the upper block 1 self-adaptively rotate due to its own pressing down to the contact between the smooth plane and the arc surface, the rear end of the upper block 1 is limited by the stopper. It can rotate within a predetermined angle range, so that the rotary stamping movement of the upper block 1 is more accurate and stable, and the stamping forming quality is stable and reliable. Further, the stopper in the above-mentioned embodiment can be made into the following structure: it mainly includes a stop plate 5, a spring 7 and a slide rail 8, wherein the spring 7 and the slide rail 8 are both connected to the upper template 9 at one end, The template 9 is connected with the main shaft of the punching machine, the limiting plate 5 is located above the rear end of the upper block 1 and is penetrated by the other end of the slide rail 8, and the other end of the spring 7 is connected to the limiting plate 5 so that the upper block 1 can be hinged and rotated When reaching a certain angle and pressing and contacting the limiting plate 5, the limiting plate 5 slides up and down along the sliding rail 8 for a predetermined distance. The setting of the limit plate 5 can control the movement range of the upper block 1 plate during rotation and smooth stamping, and ensure the bending degree of the stamping C-pillar, and with the elastic action of the spring 7, it can make the C-pillar bend downward when the C-pillar is pressed downward. The bending forming is smoother and more stable, and the bending forming quality is improved.
 In addition, such as Figure 7 The upper part of the rear end surface of the cope block 1 of this embodiment has rounded corners, and when the cope block 1 is hinged and rotated, the rounded surface of the rounded corners is always tangent to the bottom surface of the limiting plate 5 , So that when the upper block 1 is restricted from rotating, it can contact with the limiting plate 5 more smoothly, so as to better maintain the rotary punching movement of the upper block 1.
 This embodiment also includes a limit block 6 arranged above the front end of the upper block 1, such as Figure 7 The limit block 6 is fixed on the upper template 9. The limit block 6 always keeps contact with the top of the upper block 1 when the upper block 1 rotates, so that the upper block 1 rotates and smoothly punches the C-pillar. It has a more stable pressing force to maintain, ensuring the bending effect. Further, in order to enhance the above effect and prevent the limit block 6 from interfering with the rotation of the upper block 1, the bottom surface of the limit block 6 has a wedge-shaped surface inclined backward and upward, and the inclination angle of the wedge-shaped surface must be The cope block 1 can be allowed to rotate without interference within a predetermined hinge rotation angle range.
 The transverse feed mechanism of this embodiment can have many kinds, any moving mechanism that can cooperate with the rotary punching movement of the upper block 1 to bend the front section of the end of the C-pillar from the transverse direction can be adopted; here, as Image 6 As shown, the preferred structure of this embodiment is as follows: It mainly includes a knife-inserting mechanism 4 that can move up and down, and the bottom end of the knife-inserting mechanism 4 faces the side of the side pushing mechanism 3. Inclined contact surface, the inclination direction and size of the inclined contact surface must be such that when the inserting mechanism 4 moves up and down, the side pushing mechanism 3 is pushed in the transverse direction to bend the front end of the C-pillar into a predetermined arc.
 The C-pillar press-bending forming device of this embodiment can be provided with multiple units as required, and the combined structure is referred to Figure 8 As shown, 4 C-pillars can be bent and formed. Considering that multiple devices are installed at the same time and driven at the same time, each press-bending forming mechanism can be connected to a common upper mold plate 9 through its respective upper mold mounting plate 10, and the corresponding punching movement can be realized by moving the upper mold plate 9 up and down.
 The above-mentioned embodiments only exemplarily illustrate the principles and effects of the present invention, but are not used to limit the present invention. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.