High speed punch press is made of integrated special cast iron alloy with high rigidity and vibration resistance. The slider is designed with long guide way and equipped with slider balancing device to ensure precise and stable operation. All anti-wear components are lubricated with electronic timer automatic lubrication system, if there is a lack of lubricant, the press will stop automatically. The advanced and simple control system ensures the accuracy of the slide running and stopping. It can be matched with any automated production requirements to improve productivity and reduce cost.
Scope of Application
High-speed presses are widely used for stamping small precision parts for precision electronics, communications, computers, household appliances, automotive parts, motor stator and other small precision parts.
Characteristics of the role of CNC punch press is the abbreviation of digital control punch press, is a kind of active machine tool equipped with program control system. The control system can logically handle programs with control codes or other symbolic instruction rules and decode them, then make the press move and process parts.
CNC punch press operation and monitoring are completed in this CNC unit, which is the brain of the CNC punch press. Compared with the usual punch press, CNC punch press has many characteristics, first of all, its high processing accuracy, with stable processing quality; secondly, it can be multi-coordinate linkage, can process the shape of the parts can do shear forming; again, the processing of parts change, usually only need to change the CNC program, you can save the production preparation time; punch itself high precision, rigidity, can choose the amount of favorable processing, high yield; and, the punch itself high precision, high rigidity, can choose favorable processing, high productivity; and, the press is a CNC control unit, it is the brain of CNC punch press. High rate; and, the punch press active degree is high, can reduce the labor intensity; finally is the punch press on the operator's nature of the higher demand, the repair personnel skills demand higher.
CNC punch press can be used for all kinds of sheet metal hardware parts processing, can be a one-time initiative to complete a variety of messy hole type and shallow deep drawing molding process, (according to the demand for active processing of different scales and hole spacing of different shapes of holes, can also be used for small punching die to step punching method of punching a large round hole, square holes, waist shaped holes and all kinds of shapes of curves in general, but also can be special process, such as shutters, shallow stretching, countersunk holes, flanging hole It can also be used for special processing such as louver, shallow stretching, countersinking hole, flange hole, reinforcement, embossing, etc.). After a simple combination of molds, relative to the traditional stamping, saving a lot of mold costs, can use low-cost and short-cycle processing of small quantities, diversified products, with a larger processing scale and processing capacity, and then in a timely manner to get used to the shopping malls and product changes.
Working Principle
The design principle of punch press is to convert the circular motion into linear motion, the main motor will drive the flywheel, and the clutch will drive the gears, crankshaft (or eccentric gears), and connecting rods to achieve the linear motion of the slider, and the motion from the main motor to the connecting rods will be the circular motion. Between the connecting rod and the slider there needs to be an adapter between the circular motion and the linear motion, and there are roughly two kinds of mechanisms in its design, one is ball type and the other is pin type (cylindrical type), through which the circular motion is converted into the linear motion of the slider. Punching machine applies pressure to the material to make it plastic deformation, and get the required shape and precision, so it must be matched with a set of molds (divided into the upper and lower molds), the material will be placed in the middle of it, the pressure exerted by the machine, so that the deformation of the processing of the force exerted on the material caused by the reaction of the force, by the punch press machine body to be absorbed.
Classification
1. According to the slider driving force can be divided into mechanical and hydraulic two kinds, so the punch press according to its use of different driving force is divided into.
(1) Mechanical presses
(2) Hydraulic punching machine
Most of the general sheet metal stamping processes use mechanical presses. Hydraulic punching machine according to its use of different liquids, hydraulic punching machine and hydraulic punching machine, the use of hydraulic punching machine accounted for the majority of hydraulic punching machine, hydraulic punching machine is more for large-scale machinery or special machinery.
2.Classification according to the slider movement mode.
According to the classification of slider movement, there are single-acting, double-acting and triple-acting punch presses, only the most used one is the single-acting punch press of a slider, and the double-acting and triple-acting punch presses are mainly used in the induction processing of automobile bodies and large-scale machining parts, and the number of them is very small.
3.Classification according to the slider drive mechanism.
(1) Crankshaft type presses
Punching machines that use a crankshaft mechanism are called crankshaft punching machines, and most mechanical punching machines use this mechanism. The most popular reasons for using crankshaft mechanism are that it is easy to manufacture, the position of the lower end of the stroke can be determined correctly, and the slide motion curve is generally applicable to various processes. Therefore, this type of press is suitable for punching, bending, drawing, hot forging, warm forging, cold forging and almost all other press processes.
(2) Crankshaft-less punch presses
No crankshaft type punch press, also known as eccentric gear type punch press, crankshaft type punch press and eccentric gear type punch press two structure of the function of the comparison, eccentric gear type punch press structure of the shaft rigidity, lubrication, appearance, maintenance, etc. is better than the structure of the crankshaft, the disadvantage of the price is higher. When the stroke is longer, the eccentric gear type punch press is more favorable, and when the stroke of the punching and cutting special machine is shorter, the crankshaft punch press is better, so the small machine and the high-speed punching and cutting punch press are also the field of the crankshaft punch press.
(3) Elbow joint type presses
The elbow joint mechanism used in the slide drive is called the elbow joint type press. This type of press has a unique slide motion curve in which the speed of the slide becomes very slow near the lower dead center (compared to a crankshaft press). And also correctly determines the stroke under the dead center position, therefore, this press is suitable for embossing and finishing and other compression processing, and now the cold forging is used the most.
(4) Friction type presses
A press that uses a friction drive and a screw mechanism on the rail drive is called a friction press. This type of press is the most suitable for forging and crushing operations, and can also be used for bending, forming, and stretching, etc. It has a versatile function and was widely used before the war because of its low price. Due to the inability to determine the position of the lower end of the stroke, processing accuracy is not good, slow production speed, control operation error will produce overload, the use of skilled technology and other shortcomings, is now gradually being eliminated.
(5) Screw-type presses
The screw mechanism used in the slide drive mechanism is called a screw press (or screw press).
(6) Rack and Pinion Punching Machine
The rack and pinion mechanism used in the slide drive mechanism is called a rack and pinion punch press. Screw presses have almost the same characteristics as rack and pinion presses, and their characteristics are similar to those of hydraulic presses. It used to be used for pressing in bushings, extrusion of chips and other items, oil extraction, bundling, and pressing out of cartridges (thinning process between heat), etc., but now it has been replaced by the hydraulic press, and is no longer used unless under very special circumstances.
(7)Linkage type presses
The press that uses various linkage mechanisms on the slide drive mechanism is called a linkage-type press. The purpose of using the connecting rod mechanism is to shorten the cycle of processing while keeping the stretching speed within limits during the lead-in process, and to improve productivity by reducing the speed change of the lead-in process, accelerating the speed of the approach stroke from the upper dead center to the start of the process, and the speed of the reversion stroke from the lower dead center to the upper dead center to have a shorter cycle than the crankshaft punch press. This type of press has been used since ancient times for the deep drawing of cylindrical containers with a narrower bed surface, and has recently been used for the processing of automobile body panels with a wider bed surface.
(8)Cam type presses
A press that uses a cam mechanism on the slide drive mechanism is called a cam press. This type of press is characterized by making appropriate cam shapes so that the desired slide motion curve can be easily obtained. However, because of the nature of the cam mechanism, it is difficult to convey a large force, so the capacity of this type of press is very small.
How to choose
The selection of high-speed punch press should consider the following issues.
Punching machine speed Now there are two speeds called high speed in Taiwan and domestic punching machines in the market, one is the highest speed 400 times/minute and the other is 1000 times/minute. If your product molds require a speed of 300 cycles/minute or higher, you should choose a press with a speed of 1000 cycles/minute. Because the equipment can not be used in the limit, and 400 times / minute or less of the punch press is generally not mandatory lubrication system, in the joints part of the butter lubrication, and the punch structure is used in the slider type, the accuracy is difficult to ensure that the wear and tear over a long period of time in the work of a very fast, the accuracy of decline in the mold is easy to be damaged, the machine and the mold maintenance rate is high, and delays in the time, affecting the delivery date.
Punching machine precision Punching machine precision is mainly rest now.
1, parallelism
2, perpendicularity
3、Total clearance
Punching machine with high precision can not only produce good products, but also less damage to the mold, not only save the mold maintenance time but also save the maintenance cost.
Lubrication system high-speed punch press per minute stroke (speed) is very high, so its lubrication system requirements are high, only the use of forced lubrication system, and with lubrication abnormal detection function of high-speed punch press in order to effectively reduce the punch press due to the lubrication and the chances of failure.
