Sheet metal bending device

Abstract

The utility model discloses a sheet metal bending device, comprising a machine tool, a gantry, an upper die and a lower die, and also comprising a left lifting frame, a right lifting frame and a positioning backer, wherein the positioning backer is arranged on the left lifting frame, and the upper end of the positioning backer is higher than the upper surface of the lower die; a rotating shaft seat is arranged on the machine tool, and the ends of the left and right lifting frames close to the lower die are rotatably arranged on the rotating shaft seat, a lifting hydraulic cylinder is arranged on the gantry, and the driving shaft of the lifting hydraulic cylinder is arranged on the left and right lifting frames; a bending start state and a bending completion state are formed between the upper die, the lower die, the left lifting frame and the right lifting frame, and in the bending completion state, the lifting hydraulic cylinder drives the left and right lifting frames to rotate toward the upper die, and the upper die is pressed against the lower die. During bending, the positioning of the sheet metal is realized by the positioning backer, and the lifting hydraulic cylinder, the left and right lifting frames can drive the two ends of the sheet metal to be automatically lifted, thereby improving the bending efficiency and the yield rate.

Description

Technical Field

[0001] The utility model relates to the technical field of bending, in particular to a sheet metal bending device. Background Art

[0002] The sheet metal parts of existing integrated stove products are usually bent using hydraulic bending machines. When bending larger parts, the bending positioning is inconvenient, two people are required to operate, and the bending accuracy cannot be guaranteed when bending in batches. Therefore, improvements are needed. Summary of the invention

[0003] The utility model provides a new sheet metal bending device to solve the defects in the prior art such as low bending accuracy and bending efficiency due to inconvenient positioning and the need for two people to operate when bending larger parts.

[0004] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0005] A sheet metal bending device comprises a machine tool, a gantry arranged on the machine tool, an upper die and a lower die, the lower die is arranged on the machine tool, the upper die is movably arranged on the gantry, the upper die is located above the lower die, and further comprises a left lifting frame, a right lifting frame and a positioning backer, the positioning backer is arranged on the left lifting frame, the upper end of the positioning backer is higher than the upper surface of the lower die; the left lifting frame and the right lifting frame are distributed on both sides of the lower die, a rotating shaft seat is arranged on the machine tool, and one end of the left lifting frame and the right lifting frame close to the lower die is rotatably arranged on the rotating shaft seat. On the axle seat, a lifting hydraulic cylinder is arranged on the gantry, and the driving shaft of the lifting hydraulic cylinder is arranged on the left lifting frame and the right lifting frame; a bending start state and a bending completion state are formed between the upper die, the lower die, the left lifting frame and the right lifting frame. In the bending start state, the left lifting frame and the right lifting frame are unfolded in the horizontal direction, and the upper die is separated from the lower die; in the bending completion state, the lifting hydraulic cylinder drives the left lifting frame and the right lifting frame to rotate at one end away from the lower die toward the upper die, and the upper die is pressed against the lower die.

[0006] The ends of the plate are pressed against the positioning backrest to pre-position the plate during bending. When the plate is bent, the lifting hydraulic cylinder drives the left lifting frame and the right lifting frame to fold toward the upper die, so that both ends of the plate can be automatically lifted to the set angle without the need for manual lifting by the staff. This not only reduces labor intensity, facilitates the bending of large plates, improves bending efficiency, but also improves the consistency of the bending angle and the yield rate of the finished bent products.

[0007] Preferably, in the sheet metal bending device described above, a movable cylinder is provided on the left lifting frame, an output shaft of the movable cylinder is provided on a positioning backrest, and the movable cylinder pushes the positioning backrest to reciprocate along the length direction of the left lifting frame.

[0008] The positioning backrest is driven to move by the moving cylinder, so that the bending size can be adjusted, which is convenient for use.

[0009] Preferably, in the sheet metal bending device described above, a guide groove is provided on the left lifting frame, and a guide block is provided on the positioning backrest, and the guide block extends out of the guide groove and slides along the guide groove.

[0010] The arrangement of the guide block and the guide groove can guide the movement of the positioning backer, thereby improving the stability of the movement of the positioning backer.

[0011] Preferably, in the sheet metal bending device described above, a mounting plate is provided on the gantry, the upper mold is detachably arranged on the mounting plate, a mounting groove is provided on the mounting plate, and the end of the upper mold is inserted into the mounting groove.

[0012] The mounting plate provides an installation position for the upper die, and the mounting groove plays a pre-positioning role when the upper die is fixed on the mounting plate, which facilitates the installation of the upper die.

[0013] Preferably, in the sheet metal bending device described above, the gantry is provided with slide rails, the slide rails extend in a vertical direction, and both ends of the mounting plate are slidably arranged on the slide rails.

[0014] The setting of the slide rail realizes the limitation of the moving direction of the mounting plate and improves the accuracy of the upper die movement during bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model in the state of starting to bend;

[0016] Figure 2 It is a structural schematic diagram of the utility model in a bending completion state;

[0017] Figure 3 It is a structural schematic diagram of the right lifting frame, the lower die and the rotating shaft seat of the utility model;

[0018] Figure 4 It is an exploded schematic diagram of the mounting plate and the upper mold of the utility model.

[0019] Explanation of the accompanying drawings: 1. Machine tool; 11. Rotating shaft seat; 2. Gantry; 21. Lifting hydraulic cylinder; 22. Mounting plate; 221. Mounting groove; 23. Slide rail; 3. Upper mold; 4. Lower mold; 5. Left lifting frame; 51. Moving cylinder; 52. Guide groove; 6. Right lifting frame; 7. Positioning backrest; 71. Guide block; 8. Main drive roller; 81. Auxiliary drive roller; 82. Rotating main board; 83. Rotating motor; 84. Rotating belt; 85. Fixed main board. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-4 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0021] Example 1

[0022] like Figure 1-Figure 4 As shown, a sheet metal bending device comprises a machine tool 1, a gantry 2, an upper die 3 and a lower die 4 arranged on the machine tool 1, wherein the lower die 4 is arranged on the machine tool 1, the upper die 3 is movably arranged on the gantry 2, the upper die 3 is located above the lower die 4, and further comprises a left lifting frame 5, a right lifting frame 6 and a positioning backing 7, wherein the positioning backing 7 is arranged on the left lifting frame 5, and the upper end of the positioning backing 7 is higher than the upper surface of the lower die 4; the left lifting frame 5 and the right lifting frame 6 are distributed on both sides of the lower die 4, a rotating shaft seat 11 is arranged on the machine tool 1, and the left lifting frame 5 and the right lifting frame 6 are rotatably arranged at one end close to the lower die 4 Placed on the rotating shaft seat 11, the gantry 2 is provided with a lifting hydraulic cylinder 21, and the driving shaft of the lifting hydraulic cylinder 21 is arranged on the left lifting frame 5 and the right lifting frame 6; a bending start state and a bending completion state are formed between the upper mold 3, the lower mold 4, the left lifting frame 5 and the right lifting frame 6. In the bending start state, the left lifting frame 5 and the right lifting frame 6 are unfolded in the horizontal direction, and the upper mold 3 is separated from the lower mold 4; in the bending completion state, the lifting hydraulic cylinder 21 drives the left lifting frame 5 and the right lifting frame 6 to rotate away from the lower mold 4 toward the upper mold 3, and the upper mold 3 is pressed against the lower mold 4.

[0023] Preferably, a movable cylinder 51 is provided on the left lifting frame 5 , and an output shaft of the movable cylinder 51 is provided on the positioning backrest 7 , and the movable cylinder 51 pushes the positioning backrest 7 to reciprocate along the length direction of the left lifting frame 5 .

[0024] Preferably, a guide groove 52 is provided on the left lifting frame 5 , and a guide block 71 is provided on the positioning backer 7 . The guide block 71 passes through the guide groove 52 and slides along the guide groove 52 .

[0025] Preferably, a mounting plate 22 is provided on the gantry 2 , and the upper mold 3 is detachably provided on the mounting plate 22 . A mounting groove 221 is provided on the mounting plate 22 , and an end of the upper mold 3 is inserted into the mounting groove 221 .

[0026] Preferably, a slide rail 23 is provided on the gantry 2, and the slide rail 23 extends in a vertical direction. Both ends of the mounting plate 22 are slidably disposed on the slide rail.

[0027] Specifically, in the embodiment of the present application, two lifting cylinders are installed on the gantry 2, and a fixing hook is installed on the output shaft of the lifting cylinder. The fixing hook is fixed to the mounting plate 22 by screws, and the mounting plate 22 is driven to reciprocate in the vertical direction by the lifting cylinder.

[0028] More specifically, when bending a sheet, Figure 1-Figure 3 As shown, the plate is first placed on the right lifting frame 6, and then the rotating motor 83 is turned on. At this time, the plate can be moved to the end of the plate against the positioning support 7 through the main transmission roller 8 and the auxiliary transmission roller 81.

[0029] Start the lifting cylinder, which drives the upper mold 3 to move downward until the upper mold 3 is pressed against the plate on the lower mold 4. At the same time, the left lifting frame 5 and the right lifting frame 6 are synchronously folded to a suitable angle close to the upper mold 3 by lifting the hydraulic cylinder 21. At this time, the bending work of the plate can be completed.

[0030] like Figure 1 , Figure 2 As shown, when the bending size of the plate needs to be adjusted, the positioning backer 7 is driven by the moving cylinder 51 to move to a suitable position towards or away from the lower die 4, and the bending size can be adjusted according to the plates of different sizes.

[0031] In short, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A sheet metal bending device, comprising a machine tool (1), a gantry (2) arranged on the machine tool (1), an upper die (3) and a lower die (4), wherein the lower die (4) is arranged on the machine tool (1), the upper die (3) is movably arranged on the gantry (2), and the upper die (3) is located above the lower die (4), characterized in that: It also includes a left lifting frame (5), a right lifting frame (6) and a positioning backrest (7), wherein the positioning backrest (7) is arranged on the left lifting frame (5), and the upper end of the positioning backrest (7) is higher than the upper surface of the lower mold (4); the left lifting frame (5) and the right lifting frame (6) are distributed on both sides of the lower mold (4), a rotating shaft seat (11) is arranged on the machine tool (1), and one end of the left lifting frame (5) and the right lifting frame (6) close to the lower mold (4) is rotatably arranged on the rotating shaft seat (11), and a lifting hydraulic cylinder (21) is arranged on the gantry (2), and the driving force of the lifting hydraulic cylinder (21) is The shaft is arranged on the left lifting frame (5) and the right lifting frame (6); a bending start state and a bending completion state are formed between the upper die (3), the lower die (4), the left lifting frame (5) and the right lifting frame (6); in the bending start state, the left lifting frame (5) and the right lifting frame (6) are unfolded in the horizontal direction, and the upper die (3) and the lower die (4) are separated; in the bending completion state, the lifting hydraulic cylinder (21) drives the left lifting frame (5) and the right lifting frame (6) to rotate in a direction close to the upper die (3) away from the lower die (4), and the upper die (3) is pressed against the lower die (4).

2. A sheet metal bending device according to claim 1, characterized in that: The left lifting frame (5) is provided with a movable cylinder (51), the output shaft of the movable cylinder (51) is provided on the positioning support (7), and the movable cylinder (51) pushes the positioning support (7) to move back and forth along the length direction of the left lifting frame (5).

3. A sheet metal bending device according to claim 2, characterized in that: The left lifting frame (5) is provided with a guide groove (52), and the positioning backer (7) is provided with a guide block (71), and the guide block (71) passes through the guide groove (52) and slides along the guide groove (52).

4. The sheet metal bending device according to claim 1, characterized in that: The gantry (2) is provided with a mounting plate (22), the upper die (3) is detachably arranged on the mounting plate (22), the mounting plate (22) is provided with a mounting groove (221), and the end of the upper die (3) is inserted into the mounting groove (221).

5. A sheet metal bending device according to claim 4, characterized in that: The gantry (2) is provided with a slide rail (23), the slide rail (23) extends in a vertical direction, and both ends of the mounting plate (22) are slidably arranged on the slide rail.

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