Welding force correcting method and correcting device
A calibration method and welding force technology, applied in welding equipment, auxiliary equipment, auxiliary welding equipment, etc., can solve the problems of measurement system error, signal amplifier noise measurement error, low precision, etc., to simplify the calibration steps, reduce equipment costs, The effect of eliminating secondary measurement errors
Active Publication Date: 2021-12-21
深圳市大族封测科技股份有限公司
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Problems solved by technology
[0003] However, the force sensor can only provide limited accuracy, and the force sensor itself has a certain degree of unreliability, such as sensor installation position, installation method, etc., which will directly introduce errors in the measurement system; in addition, the signal amplifier will also introduce secondary errors Noise and measurement errors (such as temperature drift and zero drift, etc.), the measurement of the signal amplifier will also be affected by the electromagnetic noise of the wire bonding machine itself
Therefore, the accuracy of welding force calibration through force sensors is low, and an external measurement system is required to perform additional daily calibration on force sensors and signal amplifiers
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[0049] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not used to limit the present invention, and the elements, structures and features in one embodiment can also be beneficially combined with other embodiments without further description. way.
[0050] see figure 1 The correction of welding force refers to injecting different currents into the motor 11 of the welding head 10, calibrating the relationship between the current command of the motor 11 and the actual welding force of the welding head 10, and determining the welding force coefficient. The present invention provides a welding force correction method, which can obtain a more accurate welding force coefficient, s...
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The invention discloses a welding force correcting method and a correcting device. The welding force correcting method comprises the steps that a correcting jig is installed at a welding force applying point of a welding head; the change value of pressure applied by the welding head at the welding force applying point is determined; a change value of the motor current is determined; and the welding force coefficient of the welding head is obtained according to the change value of the motor current and the change value of the pressure applied by the welding head at the correcting jig. According to the method, a positioning jig is installed at the welding force applying point, the relation between the motor current and the welding force is accurately calculated through the change of the motion acceleration, and the purpose of correcting the welding force coefficient of the welding head is achieved; and meanwhile, a peripheral device, an external measuring circuit and a welding machine head body structure do not need to be changed, so that a secondary measuring error is completely eradicated, the equipment cost is reduced, and the correction step of a user is simplified.
Description
technical field [0001] The invention relates to the technical field of semiconductor packaging equipment, in particular to a welding force correction method and correction device. Background technique [0002] The correction of welding force (also known as bonding force) refers to the calibration of the relationship between the current command and the actual welding force by pouring different currents into the motor of the welding head (also known as the bonding force), determining the welding force coefficient, and forming the correction of the welding force . At present, an external force sensor can be used to amplify the force sensor signal with a signal amplifier through signal conditioning to form a force feedback reading, and then further calibrate the relationship between the force feedback and the motor current to obtain the welding force coefficient. [0003] However, the force sensor can only provide limited accuracy, and the force sensor itself has a certain degr...
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IPC IPC(8): B23K37/00
CPCB23K37/00
Inventor 李峥嵘经浩沈德春罗波高云峰
Owner 深圳市大族封测科技股份有限公司