Application of Power Press Auto Feeder in Punching Line

The power press auto feeder is used with the press machine automatic production line equipment for press machine, which plays the role of accurate conveying and leveling of the press machine equipment. The power press auto feeder punch press automatic production line is widely used in the market, such as mechanical manufacturing, electrical equipment, instruments, screens, electrical control cabinets, hardware processing, auto parts and other industries of stamping production. The NC power press auto feeder is equipped with CNC press machine, which can realize the production of one line of products such as fully automatic feeding, leveling and processing. It can make the whole machine tool realize the whole material feeding machine, automatic material discharging, automatic feeding, automatic stamping and other functions, which can fully utilize raw materials to ensure manual safety production and improve production efficiency. It can also process stamping for complex graphic products. Specifically, let’s look at the power press auto feeder application installation case!

In the use of the power press auto feeder, the raw materials are fixed by the pneumatic machinery, and a zero point position is set. After that, the feeding system automatically sends the coffin to the punching position below the punch punch according to the shape of the required punching hole. After punching a hole, the punch is automatically lifted, and the feeding system sends the next punching position of the coffin to the punch below the punch. Repeating the flushing until it is completely flushed back to the zero position as required.

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The overall application of the automatic feeder for power press is to place the material on the fixed frame of the automatic feeder, fix it by air pressure, and then input the corresponding data into the operation interface dialog box of the feeding system according to the size of the coffin and the required product. In the parameter column, after the operator inputs the value, the system will automatically calculate according to the filled data, eliminating the complicated human calculation and programming process and realizing automatic production. It is also possible to perform a separate jog operation according to customer requirements.

Introduction of Pneumatic Punch Press Feeder

Description: Pneumatic punch press feeder is an earlier machine used for punch feeding. It has two forms: active feeding and passive pulling. Active feeding is suitable for general materials. Materials are fed into the die by feeder; passive pulling is suitable for thin or soft materials, mainly used for feeding products with low precision and low speed.

Performance characteristics:

1. Pneumatic punch press feeder is an earlier machine used for punch feeding. Its main characteristics are: simple operation, convenient installation and affordable price. It is mainly used in the delivery of products with low precision and low speed. 2.This machine has two forms: active feeding and passive pulling. Active feeding is suitable for general materials, and materials are fed into the die by feeder; passive pulling is suitable for thin or soft materials. The feeder is installed in the direction of the outlet of the die, and material is pulled out by pneumatic punch press feeder to avoid material bending. 3. Standard fittings have three combination sets (water filter, air filter, pressure regulation), one high-pressure pipe (connecting air source and air feeder air path, transmitting power source to feeder), one L-type installation plate (used to install air feeder on punch), one set of guide rod, one set of sealing ring and one buffer (AF-5C starting equipment), which can make rapid feeding achieve lower vibration effect). 4. Standard pneumatic punch press feeder adopts the method of floating rod feeding, through the guide rod mounted on the slider, to complete the feeding action, and the machine itself does not have relaxation function. If the upstream and downstream journey of the press is too short or too long, the E-type feeding solenoid valve should be installed to replace the floating rod to complete the feeding; while the R-type relaxing solenoid valve is suitable for the case of high precision feeding, using the solenoid valve to relax the fixed splint to correct the error, the actual selection should be based on your specific needs.

Mechanical Press Machine Working Principle

The mechanical press machine working design principle of the mechanical power press is to convert the circular motion into a linear motion, and the main motor outputs the force to drive the flywheel. The clutch drives the gear, the crankshaft (or the eccentric gear), the connecting rod, etc. to achieve the linear motion of the slider. The motion of the motor to the connecting rod is a circular motion. There is a need for a circular motion and a linear motion transfer point between the connecting rod and the slider. The design has roughly two mechanisms, one is a spherical type and the other is a pin type (cylindrical type), and the circular motion is performed via this mechanism to a linear motion of the slider. The presses release the force on the material to plastically deform it to obtain the required shape and precision. Therefore, it is necessary to match a set of molds (dividing the upper mold and the lower mold), placing the material between them, and applying pressure by the machine to make it deformed, the reaction force caused by the force applied to the material during processing is absorbed by the mechanical body of the press.

Several Factors on the Accuracy of NC Servo Roll Feeder

Although the feeder is a rising star in the stamping industry, it is widely used as an automated production equipment because of its high precision, high stability, and multi-purpose use. It has gradually replaced the roller feeder as the leading feeding equipment in the industry. It is an industry that pays great attention to efficiency and precision. It is very precise. The details are very important, and often a detail is not done well, which will cause various problems in the feeder. Then the accuracy of the punching machine NC servo roll feeder is related to what factors, Kinglan tells us below.

1. Mechanical part

The mechanical part of each press servo roll feeder is made up of many spare parts. Small screws can also cause the machine to malfunction. Any small links can cause big mistakes. In this machinery industry, we should pay more attention to the fact that large-scale mechanical equipment is assembled with various parts. One ring and one ring will damage the operation of any whole machine. Therefore, each accessory plus process technology, using different materials, will also affect the feeding accuracy. (For example, whether the gear is grinded strictly, whether the wheel is grinded with silk several times, what is the thickness of the wall board, and what kind of material is used in, all of them all affect the accuracy of accessories.)

2. The quality of the electrical parts used is good or bad.

Everyone knows that the electrical part of the NC servo roll feeder is controlled by the servo motor and PLC operation. Therefore, the precision is relatively high, like the Youyi NC servo roll feeder with an accuracy of up to 0.02mm, and the operation is convenient. When manufacturers use accessories with poor brand or high imitation goods, the quality of the accessories themselves is not good, the accuracy is not high, how can be used in the equipment to achieve high precision. That’s why prices vary from house to house.

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3. Whether the installation and commissioning are correct

The NC servo roll feeder is installed on the punch to be used. When the installation is unqualified, the feeding accuracy will affect the feeding operation. If the installation is correct, but the debugging method is wrong, it will also affect the feeding accuracy, such as the relaxation is not in place, the material is not placed when it is fixed.

300 Ton Press Progressive Stamping

This line is set up of one 300 ton stamping press machine, one progressive die, uncoiler, straightener and feeder system for a continuously progressive stamping. Progressive stamping means that the press adopts strip stamping material and simultaneously completes multiple stamping processes with different working stations on one pair of die. Each time the die is stamped, the strip moves once a fixed distance until the product finished and come out.

The materials used are mainly black or non-ferrous metals, and the shapes of the materials are mostly long strips, or coils with a certain width. The material width must be consistent, should be within the specified tolerances, and must not have obvious burrs, distortion, waves and rust. In order to ensure that the parts have good consistency in size and shape, the material is required to have higher thickness precision and more uniform mechanical properties.

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The press working table used shall be large, the power and rigidity sufficient, and the precision good. Also, the slider has to bear a large lateral force for a long time. In the event of a malfunction, the press has a reliable emergency stop function. The stroke of the press is relatively small, because the guide and bushing of the die are usually not completely disengaged during the stamping process. In the case of fewer molds working stations or less stamping force, the open type press is often used. And in the case of more mold stations, or higher pressure, the use of closed press is more appropriate.

The feeding method is continuously fed in a straight line in a “pitch”. The size of the “pitch” of different progressive dies is not equal. Its specific value is determined during the design layout, but the accuracy of the “pitch” in the feeding process must be strictly controlled to ensure the accuracy and quality of the stamping. The “pitch” accuracy of the multi-station progressive die is ensured by the precise positioning of the feeding device and the positioning guides on the die.

Progressive stamping is suitable for the production of small-sized parts in large quantities. It has high stamping precision, good consistency of stamped parts and good interchangeability.

Product Characteristics of H Frame Single Crank Press

H frame single crank press has the following characteristics:

Closed integral welding fuselage eliminates the phenomenon of angle distortion of open press. The slide block is octahedral oriented. The guide rail is long and accurate, and the operation is smooth and the precision is high. It uses dry pneumatic friction clutch, which has low noise and easy to maintain. Hydraulic overload protection device. When it is overload, it will automatically get emergency stop. This can protect the safety of punch and die and easy to use. The automatic lubrication system has the function of oil alarm system to ensure the smooth operation of machine tools. Automatic adjustment of die height, digital display, easy mode adjustment. Safety PLC electric centralized control, with emergency stop, inch, single, continuous operation specifications. You can choose transmission output shaft, automatic feeding, air cushion and other devices.

As china h frame single crank press suppliers, our company strictly implements ISO quality management system, and strives to pursue high quality products and satisfy customers with after-sales service. We constantly updates and challenges advanced technology and manufacturing technology

Introduction of H Frame Single Crank Press

Application scope of h frame single crank press: generally suitable for small, single engineering thin steel sheet and continuous die parts blanking, punching, bending, forming work, single punching, continuous die, manipulator connection or transmission system operation.

Characteristics of H frame single crank press:

1. Integral forming straight arm frame. It is symmetric in the front and rear, and has small deformation. It is suitable for precision continuous die processing. 2. The area of punch bottom is larger than that of C-type punch, which can increase the number of die works and increase the processing range. 3. Without the defect of opening throat of C-type punch frame, the maintenance cost of die can be saved. 4.The high rigidity of the platform structure, the guide rail on the center line of the punch and the long support distance can ensure the stable accuracy and extend the service life of the die. 5. High torque wet clutch. Long friction life makes maintenance cost lower. It is pollution-free and has low noise, which meets the needs of modern environmental protection. As china h frame single crank press suppliers, we have been constantly developing and innovating. At present, we have strong technical force and broad market.

Structure and Principle of Automatic Feeder for Power Press

With the continuous progress of science and technology, the overall level of industrial automation has been greatly improved. Automatic feeder for power press is a kind of automatic equipment which supplies materials automatically and assists factory production. It is an indispensable part of human life and production. This paper mainly studies the transportation and loading positioning of the screw retaining ring by the automatic feeder for power press, and intellectualizes the control and improvement with the programmable logic programmer.

At present, the commonly used feeder, whether it is air feeder, roller feeder, NC feeder, gear feeder or high-speed clip feeder, is composed of material rack, leveling machine, feeding device (feeder), punch and continuous die, feeding device (feeder). These devices form complete automatic stamping Production line [1] along the direction of material feeding in turn. This paper studies the stamping and positioning accuracy of screw retaining ring press controlled by PLC and its development prospects and applications. Programmable processors are used to reduce errors. At the same time, reliability analysis and fault handling methods are studied to improve the processing accuracy and efficiency.

Structure and Principle of Automatic Feeder for Power Press

The base of stamping machine and the base of automatic feeder for power press are fixed on the workbench. The part of automatic feeder for power press locates in the rear. The upper part of the overlook is the vibration tray and screw feeding track of the automatic feeder. The screw retainer or workpiece enters the screw feeding track through the vibration tray, and then enters the pre-pressing position along the screw feeding track. The motor which is used to drive the vibration tray is Servo AC motor. Servo AC motor has high precision and sensitivity. The motor is located at the base. The closed-loop system controls the overall stability of the automatic feeder for power press pressed under the screw retainer.

Firstly, the operator puts the worn lifting ring on the tooling, and the sensor detects the existence of the workpiece, and sends the detection signal to the PLC processor, which controls the action of the cylinder, and the device detects the total length of the bolt in real time. Start the equipment, and the workpiece has been pre-positioned, and the detection signal is transmitted to the PLC processor, which controls the action of the transmission device, and moves the screw retaining ring through the feeding device and the vibration disk [3]. When the positioning sensor detects that the workpiece is in a predetermined position, it transmits the signal to the control system. After receiving the signal, the control system transmits the instructions to the PLC processor to control the cylinder action. If it does not meet the requirements, the device does not start. On the contrary, the device starts and automatically sends the screw retaining ring to the top of the bolt, and the device starts to press down.
When the downward pressure of the equipment reaches the limit position of the workpiece, the total height of the fixtures (sleeve and gasket, etc.) on the bolt is detected by the displacement sensor. If the total height does not match the preset parameters of the equipment, the equipment will stop working by alarm; otherwise, the downward pressure will be completed. When the workpiece is processed, the PLC processor controls the clamping cylinder to loosen, and moves the workpiece to the appropriate position. It removes the processed workpiece, and puts it into the unprocessed workpiece, and circulate the processing like this. The pneumatic flexible clamping system mainly includes: control device, detection device, positioning device, clamping device and workpiece removal device.

Hardware Selection of Automatic Feeder for Power Press System

LC and Module Selection

The hardware system of the automatic screw automatic feeder for power press uses Omron’s CP1 PLC as the core controller. During the pressing process, the cylinder is used to drive the screw retaining ring. The laser distance sensor and displacement sensor are combined to control the screw retaining ring’s pressure and the position accuracy of the bolt. Servo motor, as an important automation equipment to replace personnel operation, can achieve up to four-axis motor control by adjusting the built-in parameters. In terms of cost savings, the CP series is more in line with the actual work needs. It can achieve the positioning accuracy required by conveyor belt, assembly device, sensor, etc. It can also be used for high-speed counter, frequency conversion control functions. The CP series can greatly reduce the number of devices. In addition, the cost of the CP series is considerable and widely used. Under the CP series, CP1L includes CP1L-EM/EL with Ethernet port and can output 2-axis pulse.

Because the Socket communication function on board can carry on the signal transmission with the computer and other communication equipment equipped with the Ethernet equipment. Rich I/O units not only improve the overall performance of PLC, but also increase input and output units such as temperature sensors.
The function of PLC has been further expanded to make it more widely used [6].

Selection of Human-machine interface

Human Machine Interaction (HMI) is a human-machine interface produced by Zhongda Telecom Co., Ltd. Touch detection unit is installed in front of the display screen to detect the user’s touch position and accept the backward touch screen controller. The main function of Delta touch screen controller is to receive touch information from the touch point detection device, to convert it into contact coordinates, and then send it to the CPU, which can also receive commands from the CPU and execute them.

Software System Design of Automatic Feeder for Power Press

PLC Main Program Design

PLC executes a procedure from beginning to the end. The program enters the image area from the input port. Each input port reads the port state from the memory, and then writes it into the device image area. The output port reads out the output state from the storage area, and then controls the external relays, component switches and so on, so as to control the whole feeding system.

System Control Flow

According to the actual work needs of the screw ring automatic feeder for power press, the whole process from feeding to discharging is the combination of automatic control and manual work. After the operator starts to install the installed lifting ring on the tooling, the bolt height is detected by the laser distance sensor. If the height reaches the preset parameter value, the equipment will alarm. After the feeder sends the screw ring to the designated position, the stamping bar will start. The displacement sensor detects the total length of the bolt and the thread retaining ring assembled at this time. If the length reaches the preset parameter value, the assembly process is completed and the workpiece is taken out.

Man-machine interface programming

Man-machine interface is offered for operators to observe the implementation of the program, such as the detection of bolt height and screw retainer pressure, the pneumatic circuit will carry out a series of actions. If the actual height value meets the preset parameter requirements, it can be adjusted by the control program button on the man-machine interface.

conclusion

Automatic feeder for power press plays an important role in actual production. With the advent of industrial 4.0, automated production slowly replaces manual operation, and improves production efficiency while improving production process, which greatly reduces the overall production time of enterprises. The peripherals controlled by PLC are easy to operate, which is beneficial for operators to learn and use. Flexible clamping is becoming more and more stable, which is more suitable for the needs of production diversity. The screw retaining ring down-pressure automatic feeder for power press studied in this paper meets the needs of the development of the times, and has a certain reference for future equipment upgrading.