초록 ▼

A flexible roll-die forming machine for variable cross-section parts includes: a feeding device and a flexible roll-die forming unit; wherein the flexible roll-die forming unit includes at least a set of flexible roll-die forming devices; when two or more sets of the flexible roll-die forming device

A flexible roll-die forming machine for variable cross-section parts includes: a feeding device and a flexible roll-die forming unit; wherein the flexible roll-die forming unit includes at least a set of flexible roll-die forming devices; when two or more sets of the flexible roll-die forming devices are provided, the flexible roll-die forming devices are connected in sequence; wherein the feeding device is arranged at a front end of the flexible roll-die forming unit and is connected to an adjacent flexible roll-die forming device. The present invention effectively solves problems that conventional flexible roll-die forming machines are not able to produce narrow part with variable cross-sections, and the forming accuracy is poor. The present invention also reduces the amount of shafts controlled by servo motors, so as to simplify the controlling system, improve system operation reliability and simplify maintenance.

대표청구항 ▼

1. A flexible roll-die forming machine with dies and movable rollers, comprising: at least a feeding device and a flexible roll-die forming unit; when two or more sets of flexible roll-die forming devices are provided, said flexible roll-die forming devices are connected in sequence; wherein said fe

1. A flexible roll-die forming machine with dies and movable rollers, comprising: at least a feeding device and a flexible roll-die forming unit; when two or more sets of flexible roll-die forming devices are provided, said flexible roll-die forming devices are connected in sequence; wherein said feeding device is arranged at the front end of said flexible roll-die forming unit and is connected to an adjacent flexible roll-die forming device;wherein said flexible roll-die forming device comprises: a holder (12), dies, a bottom die supporter (16), a die opening and closing mechanism, an X-axis moving mechanism, and a Y-axis moving frame; wherein said dies comprises: a top die (14) and a bottom die (15); wherein said die opening and closing mechanism comprises: a die opening and closing frame, a hydraulic cylinder (9), a Z-axis constrained rolling linear rail pair (8), and a top die connecting beam (13); wherein said die opening and closing frame comprises a die opening and closing column (10) and a cross beam (11);wherein said die opening and closing column (10) is connected to said holder (12); said hydraulic cylinder (9) is connected to said die opening and closing frame; there are two hydraulic cylinders (9) symmetrically arranged at two sides of said flexible roll-die forming machine; a movable end of said hydraulic cylinder (9) is connected to said top die connecting beam (13);wherein said Z-axis constrained rolling linear rail pair (8) is mounted on said die opening and closing column (10); there are four Z-axis constrained rolling linear rail pairs (8), each two of said Z-axis constrained rolling linear rail pairs (8) are symmetrically arranged at a front end and a rear end of said flexible roll-die forming device in a face-to-face form;wherein said top die (14) is connected to said top die connecting beam (13), said bottom die (15) is connected to said bottom die supporter (16); said bottom die (15) is unmovable; said top die (14) is driven by said hydraulic cylinder (9), so as to move up and down along a Z-axis for die opening and closing. 2. The flexible roll-die forming machine, as recited in claim 1, wherein said X-axis moving mechanism is symmetrically arranged on said holder (12); said X-axis moving mechanism on each side comprises: an X-axis driving mechanism, an X-axis moving holder and an X-axis rolling linear rail pair (17); wherein said X-axis driving mechanism comprises: an X-axis moving servo motor (22), an X-axis planetary gear reducer (21) and a bevel gear (20);wherein said X-axis moving holder comprises: an X-axis moving base (18) and a bevel rack (19); wherein a bottom end of said X-axis moving base (18) is connected to said bevel rack (19) through a screw bolt, and is mounted on said holder (12) through said X-axis rolling linear rail pair (17); said bevel rack (19) is engaged with said bevel gear (20). 3. The flexible roll-die forming machine, as recited in claim 1, wherein there are 2A sets of said Y-axis moving frames, each A set forms a unit symmetrically arranged on said X-axis moving base (18) and serves as A pass forming frames, and are connected to said X-axis moving base (18), wherein A is a natural number larger than one; wherein each set of said Y-axis moving frames comprises: a Y-axis moving servo motor (30), a Y-axis planetary gear reducer (29), a ball screw, a screw box (28), a Y-axis rolling linear rail pair (27), a top forming frame, an adaptive spring (25), a roller driving servo motor (23), a roller planetary gear reducer (24), a gear pair, and a forming roller;wherein said Y-axis moving servo motor (30), said Y-axis planetary gear reducer (29) and said ball screw are installed on said screw box (28); said Y-axis rolling linear rail pair (27) is mounted at a top portion of said screw box (28); said top forming frame is mounted on the sliders of the said Y-axis rolling linear rail pair (27); said forming roller is mounted on said Y-axis moving frame, said Y-axis moving servo motor (30) through said ball screw drives said forming roller and said Y-axis moving frame to move along Y-axis. 4. The flexible roll-die forming machine, as recited in claim 3, wherein a pretightening force of said adaptive springs (25) are adjustable according to the forming force of a metal strip, when said forming force is larger than said pretightening force, said adaptive springs (25) are adaptively compressed for protecting said Y-axis moving servo motor (30) and said ball screw. 5. The flexible roll-die forming machine, as recited in claim 3, wherein A equals to five, first four pass forming frames are the same, and a roll-die forming angle of a fifth pass forming frame is adjustable according to different springback angles between the flexible area and the constant cross-section area of a part. 6. The flexible roll-die forming machine, as recited in claim 1, wherein said feeding device comprises: a strip driving mechanism, and a width adjusting and centering constraining mechanism (3); wherein said strip driving mechanism comprises: a first strip driving mechanism mounted at a front end of said feeding device, and a plurality of second strip driving mechanisms mounted on front ends and rear ends of each set of said flexible roll-die forming devices;wherein said width adjusting and centering constraining mechanism (3) comprises: a thickness limiting roller (4) and a width limiting roller (5); wherein a center-to-center distance of said thickness limiting roller (4) is adjustable according to the thickness of a strip; a center-to-center distance of said width limiting roller (5) is adjustable according to a width of said strip; said thickness limiting roller (4) supports said strip, and said width limiting roller (5) centers and limits said strip along a Y-axis. 7. The flexible roll-die forming machine, as recited in claim 6, wherein said strip driving mechanism further comprises: two driving mechanism servo motors, a driving mechanism planetary gear reducer, a driving roller and a rolling gap adjusting mechanism; wherein said first strip driving mechanism as said front end of said feeding device is driven from a bottom side thereof by one servo motor; said second strip driving mechanisms on said front ends and said rear ends of each set of said flexible roll-die forming devices are all driven from top sides and bottom sides thereof by two servo motors. 8. The flexible roll-die forming machine, as recited in claim 1, further comprising at least a set of constant cross-section roll-die forming devices, wherein said constant cross-section roll-die forming devices are arranged behind said flexible roll-die forming unit, and are connected to adjacent flexible roll-die forming devices; when two or more sets of said constant cross-section roll-die forming devices are provided, said constant cross-section roll-die forming devices are connected in sequence. 9. The flexible roll-die forming machine, as recited in claim 1, wherein said hydraulic cylinder (9) is connected to said die opening and closing frame through a first universal joint; said movable end of said hydraulic cylinder (9) is connected to said top die connecting beam (13) through a second universal joint.