Technology

What is the nominal ability points of the press machine?

Author: Zhengzhou Haloong Machinery Manufacturing Co., Ltd. Time: 2017-04-24 16:23

    Whether crankshaft, connecting rod or toggle press machine, which were all driven by the crankshaft as the source. Connecting rod type, the toggle type is also the crankshaft drive the use of connecting rod institutions to increase or transform from the same existence of the nominal force can occur on the bottom dead center height, the so-called "nominal ability points." In the technical specifications of the press machine are clearly stated that the location of the nominal force point, that is, "how many millimeters on the bottom dead center."

What is the nominal ability points of the press machine?

     Note: The crankshaft mechanism, through the connecting rod and slider to crankshaft rotation movement into a slider linear motion, the crankshaft conversion force into the slider pressure. The fact that the linear force at the bottom dead center is infinite is large, but because of the increase in the force of the linear force, the linear force of the crankshaft mechanism changes with the rotation force of the crankshaft. The machine frame starts to produce deformation (elongation, compression, bending, etc.), it is virtually impossible to reach the theoretical infinity.
    On the other hand, in the actual production, due to the material misdirected, more than two of the material was sent to the mold processing, or mold damage to the mold parts of the pressurized situation, will produce more than the nominal capacity of the press Straight line force acting on the press, causing damage to the press. In order to protect the press from damage caused by the above reasons, most presses are equipped with "overload safety protection device", but still can not be taken lightly.
    The graph shows the stroke pressure curve, showing the relationship between the stroke length and the nominal capacity occurrence position of the press, the position on the bottom dead center of the slider, and the press force that the press can produce. From the graph can be seen on the maximum pressure is the nominal ability, nominal ability to occur at the location of the nominal ability to occur. From the nominal force point to the bottom dead center can be achieved between the nominal ability, starting from the point of occurrence of the more upward, away from the dead point of the greater the pressure can occur less pressure.
    Although the number of different models of some differences, about the length of the stroke of the middle of the pressure is only the nominal capacity of 1/2 to 1/3 the following. Since the linear force is generated by the torque of the crankshaft, the "stroke pressure curve" is also referred to as the "moment curve". The lower side of this torque curve is the range in which the press can be safely used. For example, when setting up a station for deep drawing, it is necessary to check the relationship with this "moment curve". The load of the press in the machining must never be on the upper side of the "moment curve", which requires the designer Bit allocation and depth of depth and so on. Whether crankshaft, connecting rod or toggle press machine, which were all driven by the crankshaft as the source. Connecting rod type, the toggle type is also the crankshaft drive the use of connecting rod institutions to increase or transform from the same existence of the nominal force can occur on the bottom dead center height, the so-called "nominal ability to occur." In the technical specifications of the press machine are clearly stated that the location of the nominal force point, that is, "how many millimeters on the bottom dead center."
   Note: The crankshaft mechanism, through the connecting rod and slider to crankshaft rotation movement into a slider linear motion, the crankshaft conversion force into the slider pressure. The fact that the linear force at the bottom dead center is infinite is large, but because of the increase in the force of the linear force, the linear force of the crankshaft mechanism changes with the rotation force of the crankshaft. The machine frame starts to produce deformation (elongation, compression, bending, etc.), it is virtually impossible to reach the theoretical infinity.
   On the other hand, in the actual production, due to the material misdirected, more than two of the material was sent to the mold processing, or mold damage to the mold parts of the pressurized situation, will produce more than the nominal capacity of the press Straight line force acting on the press, causing damage to the press. In order to protect the press from damage caused by the above reasons, most presses are equipped with "overload safety protection device", but still can not be taken lightly.
   The graph shows the stroke pressure curve, showing the relationship between the stroke length and the nominal capacity occurrence position of the press, the position on the bottom dead center of the slider, and the press force that the press can produce. From the graph can be seen on the maximum pressure is the nominal ability, nominal ability to occur at the location of the nominal ability to occur. From the nominal force point to the bottom dead center can be achieved between the nominal ability, starting from the point of occurrence of the more upward, away from the dead point of the greater the pressure can occur less pressure.
     Although the number of different models of some differences, about the length of the stroke of the middle of the pressure is only the nominal capacity of 1/2 to 1/3 the following. Since the linear force is generated by the torque of the crankshaft, the "stroke pressure curve" is also referred to as the "moment curve". The lower side of this torque curve is the range in which the press can be safely used. For example, when setting up a station for deep drawing, it is necessary to check the relationship with this "moment curve". The load of the press in the machining must never be on the upper side of the "moment curve", which requires the designer Bit allocation and depth of depth and so on.

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