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Press machine

A technology of mechanical device and mechanical mechanism, applied in the field of stamping mechanical device and its motor control device, can solve the problems of difficult detection of clamping, inability to detect clamping, inability to save time, etc., and achieve miniaturization improvement and low price. Effect

Inactive Publication Date: 2012-10-10
YASKAWA DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] Therefore, in the 3rd to 5th prior art, in order to detect the trapping of tiny foreign objects in the press machine (in the case of the above-mentioned tiny foreign objects with a thickness of less than 5 mm), there is In the case of disturbance (such as the reaction force generated by the change in moment of inertia caused by the above-mentioned crank mechanism that converts rotational motion into reciprocating motion), it is necessary to set a reference value smaller than the disturbance (steady-state disturbance), Existing technology cannot detect pinch-in
In addition, in order to detect the entrapment of various foreign objects in the press machine (in the case of foreign objects with different thicknesses and sizes as described above), it is necessary to change the reference value according to the thickness and size of the entrapped foreign objects. There are techniques that have difficulty detecting pinch-in
In such a case, it is necessary to arrange sensors, which are external detection devices like the first prior art, and there is also a problem that it is impossible to reduce the price of the device and save time for disposing and adjusting sensors.

Method used

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Embodiment 1

[0060] figure 1 It is a schematic configuration diagram of a press machine according to an embodiment of the present invention. In the figure, 11 is a crank mechanism, 12 is a stamping shaft, 13 is an upper die part, 14 is a lower die part, 15 is a buffer shaft, and 16 is a rack and pinion pair. In addition, as mentioned above, the upper mold part 13 is equipped with the crank mechanism 11 driven by a servo motor (not shown), and the servo motor (not shown) receives a signal from a servo amplifier or the like through a mechanical mechanism (not shown) using a plurality of gears. The upper mold part is driven by a command from a control device (not shown).

[0061]The press shaft 12 moves the upper mold part 13 up and down at a constant speed through speed control by the crank mechanism 11 . The buffer shaft 15 uses the rack and pinion pair 16 to keep the lower mold part 14 in a certain position through position control. If the upper die part 13 of the punching shaft 12 des...

Embodiment 2

[0078] Image 6 It is a schematic block diagram showing the flow of disturbance detection processing in another form of the press machine device according to the present invention. In the figure, 1 is a motor, 6 is a disturbance observer, 7 is an absolute value calculation part, 8 is a position coefficient processing part, 9 is an integrator, and 10 is a comparator. And, with embodiment 1 ( figure 2 ) differ in that it includes: a positional coefficient processing unit 8 that inputs the output of the absolute value calculation unit 7, that is, the absolute value of the disturbance estimation value; and an integrator 9 that integrates the output of the positional coefficient processing unit. Since other configurations are the same, Detailed description is omitted.

[0079] In the position coefficient processing unit 8 , by calculating the product of a coefficient determined by a certain function and the absolute value of the disturbance estimate, weighting is performed on th...

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Abstract

A press machine including a crank mechanism and a motor control device for the press machine are provided which are capable of, even when small foreign bodies generating disturbances having smaller amplitudes than that of the steady disturbance caused due to change in the moment of inertia of the crank mechanism are caught in, reliably detecting those foreign bodies without arranging any sensor or the like dedicated for detecting the intrusion of foreign bodies, as well as realizing reduction in the price and the size of the press machine and increasing reliability thereof. The motor control device includes a disturbance observer unit (2) for calculating an estimated disturbance value with respect to a motor (1) based on a torque command and a motor velocity, and an intrusion detection section (3, 4, 5) for detecting, based on the estimated disturbance value, a state of a foreign body being caught between a press shaft (12) and a cushion shaft (15).

Description

technical field [0001] The present invention relates to a stamping mechanical device for forming a metal plate (formed part) with a mold and its motor control device, and particularly relates to detection of foreign matter clamping (for example, when foreign matter is clamped or small When the fragments of the formed parts are clamped, etc.), the stamping mechanism and its motor control device. Background technique [0002] The first prior art relates to "For example, in a punching machine device that fixes a material to be processed on a die by a punching plate, and presses the fixed material to be processed by the punching action of the upper die part and the lower die part, by The relative movement of the punching template and the upper mold part to detect the technology of the detection device of the foreign matter", "the purpose is to provide the detection device to detect the flow of electricity, and accurately detect the presence of foreign matter between the punching...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D28/00
CPCB30B15/148G05B2219/41379G05B2219/42295G05B19/4061G05B2219/37624B30B1/266B30B15/285
Inventor 井上猛贵潮崎雄志
Owner YASKAWA DENKI KK