Numerically controlled bending machine

Abstract

This utility model relates to the field of bending technology, specifically a CNC bending machine, including a support frame. A hydraulic cylinder is installed at the top of the support frame. The telescopic end of the hydraulic cylinder slides through the inner side of the support frame and is fixedly connected to the frame body. A die head assembly is installed on the frame body. A positioning rod limits the die head assembly to prevent the die head from deviating from its position. A positioning hole one and a positioning hole two are provided through the frame body. When this utility model is in use, the positioning rod slides through the positioning hole one, the cross-shaped through groove, and the positioning hole two. The positioning rod limits the rotating part to prevent it from rotating, thereby preventing the mounting frame from rotating. This stabilizes the die head structure, allowing the hydraulic cylinder to drive the die head below the mounting frame to move downwards, effectively bending the workpiece. Furthermore, the positioning rod provides stable guidance when the hydraulic cylinder drives the die head downwards to bend the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of bending technology, specifically a CNC bending machine. Background Technology

[0002] CNC bending machines use equipped molds (general or special molds) to bend cold metal sheets into workpieces with various geometric cross-sectional shapes. They are sheet metal forming machines designed for cold-rolled sheet metal processing and are widely used in sheet metal bending processing in industries such as automobiles, aircraft manufacturing, light industry, shipbuilding, containers, elevators, and railway vehicles.

[0003] Existing CNC bending machines typically have one set of dies. However, different dies are needed depending on production requirements. Changing dies requires machine downtime, reducing production efficiency. To address this issue, a CNC bending machine (publication number CN222790395U) features four sets of different dies in its bending mold, improving versatility. A switching assembly facilitates rapid switching between the four sets of dies, further enhancing production efficiency. In actual use, the switching assembly uses a geared motor to drive a worm gear, which meshes with a worm wheel. The worm gear drives the worm wheel... The driven shaft rotates, which in turn drives the mounting groove to rotate, and the mounting groove drives the die head to rotate, allowing the four sets of dies to be switched. However, when the hydraulic cylinder drives the die head to press down and bend the workpiece, the die head needs to be stable. The mounting groove is fixed by the meshing of the worm and worm wheel, which in turn fixes the die head. However, the worm and worm wheel are a transmission structure, not a stable fixing structure. This results in poor die head fixation. When the hydraulic cylinder drives the die head to press down and bend the workpiece, the die head will deviate from its position, causing bending failure. To address this, we propose a CNC bending machine. Utility Model Content

[0004] The purpose of this utility model is to provide a CNC bending machine, including a support frame. A hydraulic cylinder is installed at the top of the support frame. The telescopic end of the hydraulic cylinder slides through the inner side of the support frame and is fixedly connected to the frame body. A die head assembly is installed on the frame body. The die head assembly is limited by a positioning rod to prevent the die head from deviating from its position. A positioning hole one and a positioning hole two are provided through the frame body. The positioning rod slides through the positioning hole one and the positioning hole two. A stabilizing component is provided on the support frame to stabilize the positioning rod.

[0005] Preferably, the support frame is fixedly installed on the top of the base, and the bottom end of the positioning rod is fixedly installed on the top of the base.

[0006] Preferably, the mold head assembly includes four sets of mold heads, which are fixedly mounted on the mounting frame. One end of the rotating component is fixedly connected to the mounting frame. The rotating component rotates through the inner side of the frame near the mounting frame. The other end of the rotating component is fixedly connected to the drive end of the servo motor. The rotating component is rotatably connected to two sets of bearing seats through a pressure bearing. Both the bearing seats and the servo motor are fixedly mounted on the frame. A cross-shaped through groove is provided through the inner side of the square in the middle of the rotating component.

[0007] Preferably, the cross-shaped through groove has four sets of inlets, and the diameter of the cross-shaped through groove matches the positioning rod.

[0008] Preferably, the stabilizing component includes a load-bearing top block, four sets of guide rods are fixedly connected to the bottom of the load-bearing top block, all four sets of guide rods slide through the inner side of the support frame, four sets of springs are provided between the bottom of the load-bearing top block and the top of the support frame, the bottom of the four sets of guide rods are fixedly connected to a stabilizing block, and the positioning rod slides through a stabilizing hole opened in the center of the stabilizing block.

[0009] Preferably, a set of limiting blocks is fixedly installed on the outer wall of each of the four sets of guide rods, and all four sets of limiting blocks are located below the support frame.

[0010] Preferably, the base is fixedly connected to four sets of support legs, which are located at the four corners of the base. Each support leg is provided with a rubber anti-slip pad.

[0011] Preferably, the base has a plurality of mounting holes that are evenly distributed on both sides below the mold head.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. When this utility model is used, the positioning rod slides through the positioning hole one, the cross-shaped through groove and the positioning hole two. The positioning rod will limit the rotating part to prevent the rotating part from rotating, thereby preventing the mounting frame from rotating, thus stabilizing the mold head structure. This allows the hydraulic cylinder to drive the mold head below the mounting frame to move down and effectively bend the workpiece. Furthermore, the positioning rod slides through the positioning hole one, the cross-shaped through groove and the positioning hole two, so that when the hydraulic cylinder drives the mold head to move down and bend the workpiece, the positioning rod provides stable guidance, allowing the frame and mold head assembly to move down stably.

[0014] 2. When using this utility model, the positioning rod slides through the stabilizing hole in the center of the stabilizing block. At this time, the upper end of the positioning rod is limited by the stabilizing component, and the bottom end of the positioning rod is fixedly connected to the base, so that the positioning rod is vertically stable, ensuring that both the rotating part and the frame can move downward stably along the positioning rod. When it is necessary to replace the mold head under the mounting frame, the frame moves upward and drives the stabilizing block to move upward and detach from the positioning rod. At this time, the stabilizing component will not affect the positioning rod from detaching from the rotating part.

[0015] 3. When this utility model is used, in addition to driving the frame and the die head assembly to move downward, and then processing the workpiece by moving the die head downward, the hydraulic cylinder drives the frame and the die head assembly to move upward continuously, so that the positioning rod will disengage from the positioning hole one and the cross-shaped through groove, but the upper end of the positioning rod will not disengage from the positioning hole two. At this time, the rotating part can rotate, so that the die head assembly can adjust the die head below the mounting frame. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model in the state of replacing the working mold head;

[0018] Figure 3 This is a schematic diagram of the frame and mold head assembly structure;

[0019] Figure 4 This is a sectional view of the transfer part;

[0020] Figure 5 for Figure 1 Schematic diagram of area A;

[0021] Figure 6 for Figure 2 Schematic diagram of area B.

[0022] In the diagram: 1. Support frame; 2. Hydraulic cylinder; 3. Frame; 4. Die head assembly; 401. Die head; 402. Mounting frame; 403. Rotating component; 404. Servo motor; 405. Bearing seat; 406. Cross-shaped through slot; 5. Positioning rod; 6. Positioning hole one; 7. Positioning hole two; 8. Stabilizing component; 801. Load-bearing top block; 802. Guide rod; 803. Spring; 804. Stabilizing block; 805. Stabilizing hole; 9. Base; 10. Limiting block; 11. Support leg; 12. Mounting hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 - Figure 6This utility model discloses a CNC bending machine, including a support frame 1. A hydraulic cylinder 2 is installed at the top of the support frame 1. The telescopic end of the hydraulic cylinder 2 slides through the inner side of the support frame 1 and is fixedly connected to a frame 3. A die head assembly 4 is installed on the frame 3. A positioning rod 5 limits the position of the die head 401 to prevent it from deviating. A positioning hole 6 and a positioning hole 7 are provided through the frame 3. The positioning rod 5 slides through the positioning hole 6 and the positioning hole 7. A stabilizing component 8 is provided on the support frame 1 to stabilize the positioning rod 5.

[0025] The support frame 1 is fixedly installed on the top of the base 9, and the bottom end of the positioning rod 5 is fixedly installed on the top of the base 9. The support frame 1 can be stably fixedly installed on the top of the base 9 by means of several bolts and several nuts. The lower end of the positioning rod 5 is stably fixedly connected to the base 9 by several bolts, so that the lower end of the positioning rod 5 is stable.

[0026] The mold head assembly 4 includes four sets of mold heads 401, which are fixedly mounted on the mounting frame 402. One end of a rotating component 403 is fixedly connected to the mounting frame 402. The rotating component 403 rotates through the inner side of the frame 3 near the mounting frame 402. The other end of the rotating component 403 is fixedly connected to the drive end of a servo motor 404. The rotating component 403 is rotatably connected to two sets of bearing seats 405 via pressure bearings. Both the bearing seats 405 and the servo motor 404 are fixedly mounted on the frame 3. A cross-shaped through-hole is formed on the inner side of the square in the middle of the rotating component 403. The slot 406; all four sets of die heads 401 are fixedly installed on the mounting frame 402 using bolts and nuts, allowing the die heads 401 to be disassembled. During use, depending on the workpiece to be bent, if it is necessary to adjust the die head 401 directly below the mounting frame 402, the servo motor 404 is started to precisely drive the rotating part 403 to rotate 90°, 180°, or 270°, thus rotating the appropriate die head 401 directly below the mounting frame 402. It should be noted that the servo motor 404 can be precisely rotated to 90° or 180° by controlling the PWM (Pulse Width Modulation) signal. Alternatively, connect the servo motor's power cord to a suitable power source (the voltage should be determined according to the servo motor's specifications; for example, an SG90 typically uses a 5V power supply). Connect the signal line to the microcontroller's PWM output pin, such as the digital pin of an Arduino or the timer PWM output pin of an STM32. Servo motors are typically controlled by a time base pulse of approximately 20ms. The high-level portion of this pulse is the angle control pulse within the range of 0.5ms-2.5ms. For a 180° servo motor, a 0.5ms pulse width corresponds to 0°, a 1.5ms pulse width to 90°, and a 2.5ms pulse width to 180°. For a 270° servo motor, the correspondence between pulse width and angle may differ. Generally, 0.5ms corresponds to 0°, 1ms to 90°, 1.5ms to 180°, and 2ms to 270°, but the specific correspondence should be found in the servo motor's instruction manual.

[0027] The cross-shaped through groove 406 has four sets of inlets, and the diameter of the cross-shaped through groove 406 matches the positioning rod 5. The positioning rod 5 can be inserted into and pass through the cross-shaped through groove 406 from the four sets of inlets. When the positioning rod 5 passes through the cross-shaped through groove 406, it can limit the rotating part 403 to prevent the rotating part 403 from rotating, thereby preventing the mounting frame 402 from rotating, thus making the mold head 401 structurally stable.

[0028] The stabilizing component 8 includes a load-bearing top block 801. Four sets of guide rods 802 are fixedly connected to the bottom of the load-bearing top block 801. All four sets of guide rods 802 slide through the inner side of the support frame 1. Four sets of springs 803 are provided between the bottom of the load-bearing top block 801 and the top of the support frame 1. A stabilizing block 804 is fixedly connected to the bottom of the four sets of guide rods 802. A positioning rod 5 slides through a stabilizing hole 805 in the center of the stabilizing block 804. During daily use, if the equipment is equipped with... Figure 1 As shown, the positioning rod 5 slides through the stabilizing hole 805 in the center of the stabilizing block 804. At this time, the upper end of the positioning rod 5 is limited by the stabilizing component 8, and the bottom end of the positioning rod 5 is fixedly connected to the base 9, so that the positioning rod 5 is vertically stable, ensuring that the rotating part 403 and the frame 3 can move downward stably along the positioning rod 5.

[0029] Each of the four sets of guide rods 802 has a set of limiting blocks 10 fixedly installed on its outer wall, and all four sets of limiting blocks 10 are located below the support frame 1; when the top of the limiting block 10 contacts the bottom of the support frame 1, the equipment is as shown in the attached... Figure 2 As shown, the positioning rod 5 will disengage from the positioning hole 1 6 and the cross-shaped through groove 406, but the upper end of the positioning rod 5 will not disengage from the positioning hole 2 7. At this time, the rotating part 403 can rotate.

[0030] The base 9 is fixedly connected to four sets of support legs 11. The four sets of support legs 11 are located at the four corners of the bottom of the base 9. Each set of support legs 11 is provided with a rubber anti-slip pad. The four sets of support legs 11 can provide strong support for the base 9.

[0031] The base 9 has a plurality of mounting holes 12 through it, and the plurality of mounting holes 12 are evenly distributed on both sides below the die head 401; the plurality of mounting holes 12 facilitate the fixing of clamping mechanisms for different workpieces that need to be bent to the top of the base 9.

[0032] The working principle of this utility model is as follows: When in use, the equipment is as shown in the attached... Figure 1As shown, the positioning rod 5 slides through the positioning hole 6, the cross-shaped slot 406, and the positioning hole 7, and the upper end of the positioning rod 5 slides into the stabilizing hole 805 in the center of the stabilizing block 804. At this time, the upper end of the positioning rod 5 is limited by the stabilizing component 8, and the bottom end of the positioning rod 5 is fixedly connected to the base 9, so that the positioning rod 5 is vertically stable, ensuring that the rotating part 403 and the frame 3 can move downward stably along the positioning rod 5. At this time, the hydraulic cylinder 2 will drive the frame 3 to move downward, and the frame 3 will drive the mold head assembly 4 to move downward. Since the positioning rod 5 slides through the positioning hole 6, the cross-shaped slot 406, and the positioning hole 7, the positioning rod 5 will limit the rotating part 403 to prevent the rotating part 403 from rotating, thereby preventing the mounting frame 402 from rotating, thus stabilizing the structure of the mold head 401. In turn, the hydraulic cylinder 2 will drive the mold head 401 below the mounting frame 402 to move downward, effectively bending the workpiece.

[0033] In use, depending on the workpiece to be bent, if it is necessary to adjust the die head 401 directly below the mounting frame 402, first start the hydraulic cylinder 2 to move the frame 3 upward. After the frame 3 moves upward and contacts the stabilizing block 804, it will move the stabilizing block 804 upward. At this time, the load-bearing top block 801 and the guide rod 802 will move, and the four sets of springs 803 will be stretched until the top of the limit block 10 contacts the support frame 1. The hydraulic cylinder 2 will then stop working. At this time, the equipment is as shown in the attached figure. Figure 2 As shown, the positioning rod 5 will disengage from the positioning hole 1 6 and the cross-shaped through slot 406, but the upper end of the positioning rod 5 will not disengage from the positioning hole 2 7. At this time, the rotating part 403 can rotate. Then, the servo motor 404 is started to precisely drive the rotating part 403 to rotate 90°, 180° or 270°, so that the appropriate mold head 401 is rotated and driven to the bottom of the mounting frame 402. Finally, the hydraulic cylinder 2 is started again to drive the frame 3 to move down and reset. The four sets of stretched springs 803 will drive the stabilizing block 804 to move down and reset, so that the positioning rod 5 passes through the cross-shaped through slot 406, the positioning hole 1 6 and the stabilizing hole 805 in sequence again, so as to limit the mold head 401 again and stabilize the upper end of the positioning rod 5. If the positioning rod 5 does not pass through the cross-shaped through slot 406 smoothly, it means that the position of the mold head 401 is not adjusted properly and needs to be readjusted.

[0034] It should be noted that hydraulic cylinder 2 requires a dedicated hydraulic pump and hydraulic pipeline for use, and the hydraulic pump and its controller must be connected to a suitable external power supply.

[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A CNC bending machine, comprising a support frame (1), characterized in that: A hydraulic cylinder (2) is installed at the top of the support frame (1). The telescopic end of the hydraulic cylinder (2) slides through the inner side of the support frame (1) and is fixedly connected to the frame (3). A mold head assembly (4) is installed on the frame (3). The mold head assembly (4) is limited by the positioning rod (5) to prevent the mold head (401) from deviating from its position. A positioning hole one (6) and a positioning hole two (7) are opened through the frame (3). The positioning rod (5) slides through the positioning hole one (6) and the positioning hole two (7). A stabilizing component (8) is provided on the support frame (1). The positioning rod (5) is stabilized by the stabilizing component (8).

2. The CNC bending machine according to claim 1, characterized in that: The support frame (1) is fixedly installed on the top of the base (9), and the bottom end of the positioning rod (5) is fixedly installed on the top of the base (9).

3. A CNC bending machine according to claim 1, characterized in that: The mold head assembly (4) includes four sets of mold heads (401). The four sets of mold heads (401) are fixedly installed on the mounting frame (402). The mounting frame (402) is fixedly connected to one end of the rotating part (403). The rotating part (403) rotates through the inner side of the frame (3) near the mounting frame (402). The other end of the rotating part (403) is fixedly connected to the drive end of the servo motor (404). The rotating part (403) is rotatably connected to two sets of bearing seats (405) through the pressure bearing. The bearing seats (405) and the servo motor (404) are both fixedly installed on the frame (3). A cross-shaped through groove (406) is opened through the inner side of the square in the middle position of the rotating part (403).

4. A CNC bending machine according to claim 3, characterized in that: The cross-shaped through groove (406) is provided with four sets of inlets, and the diameter of the cross-shaped through groove (406) matches the positioning rod (5).

5. A CNC bending machine according to claim 1, characterized in that: The stabilizing component (8) includes a load-bearing top block (801), and four sets of guide rods (802) are fixedly connected to the bottom of the load-bearing top block (801). The four sets of guide rods (802) slide through the inner side of the support frame (1). Four sets of springs (803) are provided between the bottom of the load-bearing top block (801) and the top of the support frame (1). The bottom of the four sets of guide rods (802) is fixedly connected to a stabilizing block (804). The positioning rod (5) slides through the stabilizing hole (805) opened in the center of the stabilizing block (804).

6. A CNC bending machine according to claim 5, characterized in that: Each of the four sets of guide rods (802) has a set of limiting blocks (10) fixedly installed on its outer wall. All four sets of limiting blocks (10) are located below the support frame (1).

7. A CNC bending machine according to claim 2, characterized in that: The base (9) is fixedly connected to four sets of support legs (11). The four sets of support legs (11) are located at the four corners of the bottom of the base (9). Each support leg (11) is provided with a rubber anti-slip pad.

8. A CNC bending machine according to claim 7, characterized in that: The base (9) has several mounting holes (12) that are evenly distributed on both sides below the mold head (401).

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