The WinSet High Velocity Electromagnetic Punch Press is integral to your production line, optimizing your workflow while enabling you to produce precision parts and products.
With competitive price and timely delivery, Aomate sincerely hope to be your supplier and partner.
Our patented High Velocity Electromagnetic technology implements the power of speed rather than pressure. Combining the high performance of a precision die set with 750x more ram velocity than most conventional presses, the WinSet Punch Press is the ultimate machine press for many applications.
When selecting a press, it is important to clearly understand the purpose of its use. Therefore, in addition to fully understanding the processing method, operation method, functions of the press, and technological trends, it is also necessary to correctly grasp the market situation and trends. However, since processing methods and press functions are complex and difficult to understand, there are many cases in which a press is selected without really understanding the purpose of its use. In particular, when selecting a press for rationalisation purposes, it is important to be careful as there is no room for error. Wrong selection will result in lowering the efficiency of the press and may lead to wasted investment in equipment.
How to choose the appropriate punching machine?
1. Decide correctly on the processing method and operation mode
(1) Decide the processing method and engineering correctly.
There are various methods of stamping, and sometimes cutting is used in stamping. When selecting a press, you should first review whether the processing method you want is an appropriate processing method for the target product, and whether it is an appropriate number of processing works. If the processing method is decided, the type of press to be selected will be decided.
(2) Level of production volume
If a batch size exceeds 3,000 to 5,000 pieces, it is more advantageous to use automatic feeding. If there are many projects and the production volume is large, it is necessary to consider the use of continuous processing and transfer processing, and it is also necessary to review the automatic machinery such as high-speed automatic punching machines and transfer type punching machines. Although the selection of a general-purpose press or an automatic press is determined mainly by the amount of production, basically, the necessary amount should be considered and the appropriate amount of inventory should be maintained on a regular basis, and not only for the present, but also for the future of the production volume of the market situation, technological trends, and so on should be taken into consideration.
(3) Relationship between shape, quality and size of materials
The shape and quality of the material should be decided in relation to the processing method, the yield rate, and the material utilisation rate. The shape of the material varies greatly depending on whether it is a coil, a fixed-measure material, or a semi-processed product, as well as on its size and processing method.
(4) How to supply materials, take out products, and dispose of waste materials
The above operations are called MATERIAL HANDLING, and material handling accounts for a large percentage of all-round operations in a production factory. Therefore, material handling is not just a local position of digesting production, but must be considered from the overall rationalisation of the factory. According to the consideration of material handling, the function of the press machine requirement is very different.
(5) How to use the die cushion (DIE CUSHION)
The die cushion should be considered to be attached to the single-acting punch press during the lead-in process. Because the die cushion provides high performance, it is possible to perform difficult lead-in processing even without using a double-action punch press. Locking device is required as an accessory to improve the performance of the die cushion.
2. Selection of press capacity suitable for processing
(1) Calculate the processing pressure and the curve of the processing pressure stroke.
The maximum pressure required for processing and the pressure change in the processing stroke should be calculated. For multi-processing, the pressure travel curve of each process should be calculated, and the synthetic pressure travel curve should be calculated by overlapping. Deciding the maximum pressure and the pressure travel curve for machining will determine the pressure capacity to be selected.
As for the decision of working capacity, the frequency of processing (how many times a minute) should be decided first. It is better to choose a motor with one level of horsepower for a press equipped with an automatic feeder. The capacity of the press is best not to choose just saturated capacity, but should choose the common capacity is 75-80% of the nominal capacity of the press.
(2) Eccentric load, the degree of concentration of the load
In the case that a press is assembled with more than two dies or when a continuous die is used, there is of course eccentric loading, but there is also eccentric loading in most other stamping processes. Since the design of press capacity is usually based on the center load, it is necessary to pay attention to the reduction of press capacity when there is an eccentric load. Therefore, the press capacity with sufficient margin should be selected for eccentric loading. Most of the cold forging processes are extreme concentrated loads. For concentrated loads, a press with as little die space as possible should be selected.
(3) Calculation of the reduction of the effective capacity of the die buffer
When installing a die buffer, the drawing capacity of the press is equal to the capacity of the buffer. Usually, the capacity of the buffer is 1/6 of the nominal capacity of the press as a standard. This value seems to be very small at first sight, but it is definitely not a low value but an appropriate value when compared with the effective drawing capacity that can be used for the drawing process near the midpoint of the press.
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Although a high cushioning capacity of 1/3 of the press capacity is required for processing, in the case of a standard press, the effective drawing capacity around the mid-point of the stroke is significantly reduced (in the extreme case of loss of the ability to push the cushion), and so much attention should be paid to this.
Therefore, for such a high cushioning capacity, the torque capacity of the press should also be selected to be higher. If the cushioning capacity is raised too high, it will be an uneconomical structure due to the mismatch of torque capacity, so it is better to consider the use of a double-action punch press when it is necessary to do so.
3. Define the dimensional accuracy of processed products
The necessary accuracy of the processed product is determined by the purpose of the product and its relation to the following process. In the actual stamping process, there are many reasons for poor machining accuracy, such as the thickness of the material, the volume of the blank (when extruding), the material (which is related to the resistance to deformation) and the degree of lubrication, etc., and the wear and tear of the molds with the progress of production.
If high machining accuracy is particularly required, a press with high rigidity or a large capacity (one that has sufficient pressure capacity for processing) should be selected. However, C-type punching machines do not have much effect even if large capacity punching machines are used, and attention should be paid to selecting punching machines with high rigidity.
4. Fully understand the function of the punch press
(1) Fully investigate the specifications of the press catalogue.
The catalog specification indicates the main capacity and size of the press, which is the basic for selecting the press. The capacity of a press usually indicates only the pressure capacity, but the torque capacity and working capacity should be combined and reviewed. Punching machines for blanking should shorten the stroke and increase the SPM of the part, such as the height of the die, the width of the working surface, the assembly of the die on the working surface, the T-groove, and the pin hole of the buffer, etc., must be decided in relation to the die used.
It should be noted that excessive specification of the press due to the limitation of the plant will have a negative effect on the function of the press. Therefore, if there is no problem with the specifications, you should choose a standard punching machine that has a stable function and a proven track record.
(2) Selection of Punching Machine Attachments
Appropriate use of attachments can increase productivity, so various attachments should be fully reviewed.
In order to increase production, the best method is to install automatic feeding device for continuous processing. If the supply of materials and the taking out of products are too complicated for continuous processing, a timer can be used to limit the time for continuous operation and increase productivity.
The use of a conveyor or unloader is also useful for improving productivity. For example, if the molds are changed frequently, quick die change (Q.D.C.) devices and die clamps are also beneficial. It is possible to consider slow-running devices, material changeover, and product stacking devices. Stamping presses with roller feeders should be equipped with variable speed devices. And should consider the future need to install buffer and feeder (FEEDER) or rotary cam (ROTARYCAM) preparation. However, if the equipment is equipped with too many complex attachments will increase the failure rate, and increase the maintenance of the trouble, so it must be appropriate to choose the punch press attachments.
(3) Flexibility of functions should be reviewed.
In order to maintain a good yield rate, the functions of the press must be in line with the market tendency of the fierce replacement of machine types. That is to say, the function that can adapt to both mass production and small amount of production as well as the function that can follow the change of the machine type in the future should be reviewed. For example, the drive power of the automatic feeding device is usually taken from the crankshaft of the press in order to perform synchronisation easily, so that it will become a press with an automatic feeding device and enhance the specialisation for a certain operation.
If a separate drive feeder is used, it can be easily moved because it has independent power, and can be freely combined with any punch press, and can be adapted to changes in operations.
(4) Choose a press that is easy to maintain and has a high degree of reliability.
Since the production volume of stamping products is large and usually requires several projects, if the press stops due to a breakdown, it will have a great impact on the overall production. Therefore, you should choose a press that is easy to maintain, inspect, and has a high degree of reliability (especially the stability and durability of the clutch, brake, and electrical operation).
(5) Safety
Punching is a highly hazardous operation, so safety measures should be taken into consideration, and a press with safety equipment should be selected. Even if there is an error in operation, no accident will occur and the press can be operated safely. Therefore, the operation of the punch press should have various interlocking devices (inter lock), shear type and hydraulic type overload safety devices, two-hand operation, light type, mechanical type and other safety devices for operation.
(6) Noise and vibration
Noise and vibration in stamping plants are restricted by laws and regulations due to public health issues. The working environment will be an important issue in the future. Therefore, it is necessary to review the noise and vibration countermeasures for stamping equipment in the future.
(7) Automation
In recent years, the change of production pattern, the production batch has a tendency to reduce, so the mold and the exchange frequency of the material increases, in order to make it labor-saving and the shortening of time must also be operated by automation, that is to say, the selection of molds and the material, the configuration, the adjustment of the punching machine, the operation of the production, the production management, etc., for the systematic automation of the stamping processing production line of the era has come. According to the current technological situation, it is not a strange dream that an unmanned stamping line can produce the required products by remote command and maintain the required accuracy.
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