Automatic film drawing device of hydraulic machine

Abstract

The utility model discloses an automatic film drawing device of a hydraulic machine, which relates to the field of film drawing devices and comprises a PLC (programmable logic controller) arranged on the front side of the hydraulic machine, a die is fixedly arranged on the hydraulic machine, a film releasing roller is arranged on one side of the hydraulic machine, an unused drawing film is wound at the outer end of the film releasing roller, and a film collecting component is arranged on the other side of the hydraulic machine. The film collecting assembly comprises a film collecting roller, and a stepping motor capable of driving the film collecting roller to rotate is arranged on the rear side of the film collecting roller. One end of the stretching film is wound and fixed on the film releasing roller, the other end of the stretching film is fixed on the film collecting roller, the stepping motor drives the film collecting roller to rotate and drives the stretching film to move, the stretching film passes through the bottom of the die, and in the process, the hydraulic machine can push the die to extrude the stretching film downwards to complete film covering on a workpiece. Therefore, the manual film coating or film drawing process is replaced, manpower is saved, the production efficiency is improved, and the automation degree is improved.

Description

Technical Field

[0001] The utility model relates to the field of film pulling devices, in particular to an automatic film pulling device for a hydraulic press. Background Technique

[0002] During the stamping process, the surface of the workpiece will be strongly extruded by the mold. Inevitably, scratches will be left on the surface of the workpiece during this process, and the surface of the workpiece will become rough, affecting the appearance of the final product. To solve this problem, countermeasures have been taken in the stamping process in various industries, including the automotive production field.

[0003] Currently, the appearance requirements for automotive parts are getting higher and higher. Among them, the requirements for the appearance of automotive sheet metal stamping parts are even higher. This has led to more and more stamping parts starting to be produced in the form of film covering. The so-called film covering is to cover a stretching film on the surface of the workpiece to be stamped to avoid the generation of scratches.

[0004] Most of the original stamping equipment does not have the film covering process, so there is no film covering equipment. Now, most of the later added film covering processes can only be carried out manually for film covering and pulling, which greatly reduces the processing efficiency and increases the labor intensity of workers. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides an automatic film pulling device for a hydraulic press. By winding one end of the stretching film around the film releasing roller and driving the film winding roller to rotate by a stepping motor to drive the movement of the stretching film, it replaces the manual film covering or pulling process, saves manpower, improves production efficiency, and improves the degree of automation, and can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: an automatic film pulling device for a hydraulic press, which is used for film covering during the stamping of the hydraulic press, including a PLC arranged on the front side of the hydraulic press, a mold is fixedly arranged on the hydraulic press, a film releasing roller is arranged on one side of the hydraulic press, and an unused stretching film is wound around the outer end of the film releasing roller;

[0007] A film winding assembly is arranged on the other side of the hydraulic press. The film winding assembly includes a film winding roller, and a stepping motor capable of driving the film winding roller to rotate is arranged at the rear side of the film winding roller. The stretching film bypasses the bottom of the mold and is wound around the outer end of the film winding roller.

[0008] Furthermore, an encoder is arranged on one side of the hydraulic press. The encoder is located on the top of the film releasing roller, and the wheel of the encoder is in contact with the stretching film at the outer end of the film releasing roller;

[0009] An HMI visualization panel is fixedly arranged on the front side of the hydraulic press. The encoder is arranged at the input end of the PLC, the HMI visualization panel is arranged at the connection end of the PLC, and the stepping motor is arranged at the output end of the PLC.

[0010] Further, a lift truck is provided on the other side of the hydraulic press. The film winding assembly further includes a vertical plate fixedly provided at the top end of the lift truck. A sleeve is provided on the front side of the vertical plate through a rotating shaft. The rear end of the film winding roller extends into the sleeve and is connected to the sleeve by bolts, so that the film winding roller can be disassembled and replaced.

[0011] A baffle is fixedly provided at the outer end of the sleeve. The stepping motor is fixedly provided at the rear end of the vertical plate. The output shaft of the stepping motor penetrates through the vertical plate and is fixedly connected to the rear end of the sleeve to drive the film winding roller to rotate.

[0012] Further, a fastening assembly is provided at the top end of the lift truck. The fastening assembly is located between the film winding assembly and the hydraulic press. The fastening assembly includes a fixed frame fixedly provided at the top end of the lift truck. Two clamping rollers are provided inside the fixed frame, and the stretch film is clamped between the two clamping rollers.

[0013] Further, both ends of the bottom clamping roller are movably connected to the inner wall of the fixed frame through rotating shafts. Both ends of the top clamping roller are provided with adjusting blocks through rotating shafts, and the adjusting blocks are movably connected to the inner wall of the fixed frame through sliding rails.

[0014] Two screw rods are provided at the top end of the fixed frame through threads. A hand wheel is fixedly provided at the top end of the screw rod. The bottom end of the screw rod extends into the fixed frame and is fixedly provided with a ball. The ball contacts the top clamping roller. After tightening the screw rod, the clamping roller is pressed downward to clamp the film.

[0015] Further, a slider is provided on one side of the hydraulic press through a sliding rail. The slider is located at the bottom of the film unwinding roller. Two detachable adjusting cylinders are provided on the slider.

[0016] The piston rod of the adjusting cylinder extends downward. A turning roller is provided between the two piston rods. Both ends of the turning roller are respectively connected to the two piston rods through rotating shafts. The stretch film bypasses the outer end of the turning roller. The position of the turning roller is controlled by the telescoping of the adjusting cylinder to adjust the stretch film.

[0017] Compared with the prior art, the present utility model provides a hydraulic press automatic film pulling device, which has the following beneficial effects:

[0018] By winding and fixing one end of the stretch film on the film unwinding roller and fixing the other end on the film winding roller, the film winding roller is driven by a stepping motor to rotate, driving the stretch film to move, passing it through the bottom of the mold. During this process, the hydraulic press can push the mold downward to press the stretch film to complete the film covering of the workpiece, thereby replacing the manual film covering or film pulling process, saving labor, improving production efficiency, and increasing the degree of automation. Description of the Drawings

[0019] Figure 1This is the front view of the present utility model;

[0020] Figure 2 This is the structure diagram of the slider and adjustment cylinder of the present utility model;

[0021] Figure 3 This is the structure diagram of the film collecting assembly of the present utility model;

[0022] Figure 4 This is the structure diagram of the fastening assembly of the present utility model;

[0023] Figure 5 This is the system diagram of the present utility model.

[0024] In the figure: 1, hydraulic press; 2, PLC; 3, mold; 4, HMI visualization panel; 5, encoder; 6, film unwinding roller; 7, slider; 8, adjustment cylinder; 9, fastening assembly; 901, fixing frame; 902, clamping roller; 903, screw; 904, handwheel; 10, film collecting assembly; 1001, vertical plate; 1002, stepping motor; 1003, sleeve; 1004, film collecting roller; 11, lift truck; 12, corner roller. Specific embodiments

[0025] To make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the following will further elaborate on the present utility model in combination with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0026] To address the deficiencies of the prior art, as Figures 1-5 shown, the present utility model provides a hydraulic press automatic film pulling device for laminating during the stamping of the hydraulic press 1. The hydraulic press 1 is a 100T hydraulic press, including a PLC 2 provided on the front side of the hydraulic press 1. A mold 3 is fixedly provided on the hydraulic press 1. A film unwinding roller 6 is provided on one side of the hydraulic press 1, and an unused stretch film is wound around the outer end of the film unwinding roller 6;

[0027] A film collecting assembly 10 is provided on the other side of the hydraulic press 1. The film collecting assembly 10 includes a film collecting roller 1004. A stepping motor 1002 capable of driving the film collecting roller 1004 to rotate is provided behind the film collecting roller 1004. The stretch film bypasses the bottom of the mold 3 and is wound around the outer end of the film collecting roller 1004.

[0028] Wind the stretch film around the outer end of the film feeding roller 6, pull out one end of the stretch film, pass it through the bottom of the mold 3 and fix it on the stepping motor 1002. During the processing, the hydraulic press 1 is used to push the mold 3 downward. The workpiece to be processed is located at the bottom of the stretch film. Therefore, the mold 3 pushes the stretch film downward to cover and press on the surface of the workpiece. After the covering and pressing are completed, the film rewinding roller 1004 drives the stepping motor 1002 to rotate, drives the remaining stretch film to move, and moves the new stretch film to the bottom of the mold 3. This cycle repeats, replacing the manual film wrapping or pulling process, saving labor, improving production efficiency, increasing the degree of automation, and can also be extended to be used on punching presses or hydraulic presses of other tonnages.

[0029] To understand the moving speed of the stretch film, as Figure 1 、 5 shown, an encoder 5 is provided on one side of the hydraulic press 1. The encoder 5 is located at the top of the film feeding roller 6, and the wheel of the encoder 5 is in contact with the stretch film at the outer end of the film feeding roller 6;

[0030] An HMI visualization panel 4 is fixedly provided on the front side of the hydraulic press 1. The encoder 5 is provided at the input end of the PLC 2, the HMI visualization panel 4 is provided at the connection end of the PLC 2, and the stepping motor 1002 is provided at the output end of the PLC 2.

[0031] By the wheel of the encoder 5 being in contact with the stretch film wound on the film feeding roller 6, the stretch film is stressed and rotates to drive the wheel of the encoder 5 to rotate. Thus, the moving speed of the stretch film is measured by the encoder 5, and the relevant speed information can be displayed on the HMI visualization panel 4. At the same time, the rotation speed of the stepping motor 1002 can also be set through the HMI visualization panel 4, thereby adjusting the moving speed of the stretch film. It can also be automatically controlled through the PLC 2, so that the stepping motor 1002 cannot rotate when not in use, ensuring accuracy and safety.

[0032] After the winding is completed, the film rewinding roller 1004 can be disassembled and replaced. As Figure 3 shown, a lift truck 11 is provided on the other side of the hydraulic press 1. The height of the lift truck 11 can be freely adjusted. The film rewinding assembly 10 further includes a vertical plate 1001 fixedly provided at the top of the lift truck 11. A sleeve 1003 is provided on the front side of the vertical plate 1001 through a rotating shaft. The rear end of the film rewinding roller 1004 extends into the sleeve 1003 and is bolted to the sleeve 1003. Therefore, the film rewinding roller 1004 can be disassembled and replaced;

[0033] A baffle is fixedly provided at the outer end of the sleeve 1003 to prevent the stretch film from winding around the outer end of the sleeve 1003. The stepping motor 1002 is fixedly provided at the rear end of the vertical plate 1001. The output shaft of the stepping motor 1002 penetrates the vertical plate 1001 and is fixedly connected to the rear end of the sleeve 1003 to drive the film rewinding roller 1004 to rotate.

[0034] By driving the sleeve 1003 to rotate with the stepping motor 1002, the film winding roller 1004 can be driven to realize the winding of the stretching film. The sleeve 1003 and the film winding roller 1004 are connected by bolts. After the winding is completed, the film winding roller 1004 can be disassembled and separated, and a new film winding roller 1004 can be installed on the sleeve 1003 to complete its replacement work.

[0035] To keep the stretching film flat during the winding process, as Figure 1 、 4 shown, a fastening assembly 9 is provided at the top of the lift truck 11. The fastening assembly 9 is located between the film winding assembly 10 and the hydraulic press 1. The fastening assembly 9 includes a fixed frame 901 fixedly provided at the top of the lift truck 11. Two clamping rollers 902 are provided inside the fixed frame 901, and the stretching film is clamped between the two clamping rollers 902.

[0036] Both ends of the bottom clamping roller 902 are movably connected to the inner wall of the fixed frame 901 through a rotating shaft. Both ends of the top clamping roller 902 are provided with adjusting blocks through the rotating shaft, and the adjusting blocks are movably connected to the inner wall of the fixed frame 901 through sliding rails;

[0037] Two screw rods 903 are provided at the top of the fixed frame 901 through threads. A hand wheel 904 is fixedly provided at the top of the screw rod 903. The bottom end of the screw rod 903 extends into the fixed frame 901 and is fixedly provided with a ball. The ball is in contact with the top clamping roller 902. After tightening the screw rod 903, the clamping roller 902 is squeezed downward to clamp the film.

[0038] The stretching film is clamped between the two clamping rollers 902, and the top clamping roller 902 can move up and down and adjust its position. Rotate the hand wheel 904 to drive the screw rod 903, and the top clamping roller 902 is squeezed downward through the screw rod 903 to clamp and fix the stretching film, so that the stretching film can be kept as flat as possible during the winding process.

[0039] The moving direction of the stretching film needs to be guided. As Figure 1 、 2 shown, a slider 7 is provided on one side of the hydraulic press 1 through a sliding rail. The slider 7 is located at the bottom of the film unwinding roller 6. Two detachable adjusting cylinders 8 are provided on the slider 7;

[0040] The piston rod of the adjusting cylinder 8 extends downward. A turning roller 12 is provided between the two piston rods. Both ends of the turning roller 12 are respectively connected to the two piston rods through a rotating shaft. The stretching film bypasses the outer end of the turning roller 12, and the position of the turning roller 12 is controlled by the telescopic movement of the adjusting cylinder 8 to adjust the stretching film accordingly.

[0041] By adjusting the telescopic movement of the cylinder 8, the rotary roller 12 can be driven to move up and down, thereby adjusting the height of the stretch film in the die cavity and preventing the stretch film from sticking to the die in the die cavity, which may cause the stretch film to be unable to be pulled out. The rotary roller 12 also plays a guiding role, and the stretch film that originally moves longitudinally is changed to move horizontally after passing around the rotary roller 12.

[0042] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.

Claims

1. An automatic film pulling device for a hydraulic press, which is used for film covering during the stamping of the hydraulic press (1), and comprises a PLC (2) arranged on the front side of the hydraulic press (1). A mold (3) is fixedly arranged on the hydraulic press (1), and is characterized in that: On one side of the hydraulic press (1), there is a film unwinding roller (6), and an unused stretching film is wound around the outer end of the film unwinding roller (6). On the other side of the hydraulic press (1), there is a film winding assembly (10). The film winding assembly (10) includes a film winding roller (1004). Behind the film winding roller (1004), there is a stepping motor (1002) capable of driving the film winding roller (1004) to rotate. The stretching film bypasses the bottom of the mold (3) and is wound around the outer end of the film winding roller (1004).

2. The automatic film pulling device of a hydraulic press according to claim 1, characterized in that: On one side of the hydraulic press (1), there is an encoder (5). The encoder (5) is located on top of the film unwinding roller (6), and the wheel of the encoder (5) is in contact with the stretching film at the outer end of the film unwinding roller (6). On the front side of the hydraulic press (1), an HMI visualization panel (4) is fixedly installed. The encoder (5) is arranged at the input end of the PLC (2), the HMI visualization panel (4) is arranged at the connection end of the PLC (2), and the stepping motor (1002) is arranged at the output end of the PLC (2).

3. An automatic film pulling device for a hydraulic press according to claim 1, characterized in that: On the other side of the hydraulic press (1), there is a lift truck (11). The film winding assembly (10) further includes a vertical plate (1001) fixedly installed at the top of the lift truck (11). In front of the vertical plate (1001), there is a sleeve (1003) arranged through a rotating shaft. The rear end of the film winding roller (1004) extends into the inside of the sleeve (1003) and is connected to the sleeve (1003) by bolts. A baffle is fixedly installed at the outer end of the sleeve (1003). The stepping motor (1002) is fixedly installed at the rear end of the vertical plate (1001). The output shaft of the stepping motor (1002) penetrates the vertical plate (1001) and is fixedly connected to the rear end of the sleeve (1003).

4. The automatic film pulling device of a hydraulic press according to claim 3, characterized in that: At the top of the lift truck (11), there is a fastening assembly (9). The fastening assembly (9) is located between the film winding assembly (10) and the hydraulic press (1). The fastening assembly (9) includes a fixed frame (901) fixedly installed at the top of the lift truck (11). Inside the fixed frame (901), there are two clamping rollers (902), and the stretching film is clamped between the two clamping rollers (902).

5. The automatic film pulling device of a hydraulic press according to claim 4, characterized in that: Both ends of the bottom clamping roller (902) are movably connected to the inner wall of the fixed frame (901) through rotating shafts. Both ends of the top clamping roller (902) are respectively provided with adjusting blocks through rotating shafts, and the adjusting blocks are movably connected to the inner wall of the fixed frame (901) through slide rails. At the top of the fixed frame (901), there are two screw rods (903) provided through threads. At the top of the screw rods (903), there are hand wheels (904) fixedly installed. The bottom ends of the screw rods (903) extend into the inside of the fixed frame (901) and are fixedly provided with balls, and the balls are in contact with the top clamping roller (902).

6. The automatic film pulling device of a hydraulic press according to claim 1, characterized in that: On one side of the hydraulic press (1), there is a slider (7) arranged through a slide rail. The slider (7) is located at the bottom of the film unwinding roller (6), and there are two detachable adjusting cylinders (8) arranged on the slider (7). The piston rods of the adjusting cylinders (8) extend downward. Between the two piston rods, there is a turning roller (12). Both ends of the turning roller (12) are respectively connected to the two piston rods through rotating shafts, and the stretching film bypasses the outer end of the turning roller (12).

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