SU1271690A1

SU1271690A1 - Method of determining electric conditions of diamond contact spark erosion machining

Info

Publication number: SU1271690A1
Application number: SU843737265A
Authority: SU
Inventors: Юрий Алексеевич Пахалин
Original assignee: Пензенский Завод-Втуз
Priority date: 1984-05-04
Filing date: 1984-05-04
Publication date: 1986-11-23

Abstract

Изобретение позвол ет повысить качество обработки, .путем исключени дугообразовани между электродами. При выборе рабочего напр жени дл абразивного контактно-эрозионного шлифовани и контактно-эрозионной правки алмазных кругов на металлической св зке ведут наладочную обработку циклами. В каждом цикле прекращают подачу электрода-инструмента на врезание и определ ют характер изменени величины рабочего тока. За рабочее с значение напр жени выбирают такое, при котором величина рабочего тока (Л после прекращени врезной подачи монотонно уменьшаетс .The invention makes it possible to improve the quality of processing by eliminating the arcing between the electrodes. When selecting the operating voltage for abrasive contact erosion grinding and contact erosive straightening of diamond wheels on a metal bond, the adjustment process is carried out in cycles. In each cycle, the plunging of the electrode tool for cutting is stopped and the nature of the change in the magnitude of the operating current is determined. The operating voltage value is chosen such that the operating current (L, monotonously decreases after the termination of the infeed).

Description

Изобретение относится к машиностроению, в частности к электрической обработке абразивным контактно-эрозионным шлифованием и контактно-эрозионной правке алмазных кругов на металлической связке .The invention relates to mechanical engineering, in particular to electrical processing by abrasive contact-erosion grinding and contact-erosion dressing of diamond circles on a metal bond.

Цельюизобретения явйяется повышение качества и точности обрабатываемой поверхности за счет выбора рабочего напряжения, исключающего дугообразование между электродами путем наладочной обработки с определением характера изменения рабочего тока после прекращения врезной подачи.The purpose of the invention is to improve the quality and accuracy of the processed surface by selecting a working voltage that excludes arcing between the electrodes by means of adjustment processing with the determination of the nature of the change in the working current after the cut-in supply ceases.

Способ осуществляется следующим образом.The method is as follows.

Для определения рабочего напряжения осуществляют наладочную обработку циклами. В каждом цикле задается напряжение на электродах. В процессе обработки выключают врезную подачу (сближение электродов) без снятия напряжения и определяют характер изменения рабочего тока. Для дугового процесса характерно или скачкообразное изменение рабочего тока, или его стабильное значение как при включенной врезной подаче, так й при ее отключении. В этом случае снижают напряжение на электродах и повторяют цикл наладочной обработки с определением характера изменения величины рабочего тока.To determine the operating voltage carry out adjustment processing in cycles. In each cycle, the voltage at the electrodes is set. During processing, the cut-in feed (electrode approach) is turned off without removing the voltage and the nature of the change in the operating current is determined. For the arc process, either a jumplike change in the operating current is characteristic, or its stable value both when the mortise feed is turned on, and when it is turned off. In this case, reduce the voltage at the electrodes and repeat the cycle of adjustment processing with the determination of the nature of the change in the magnitude of the operating current.

За рабочее напряжение процесса алмазной контактно-эрозионной обработки выбирают такое, при котором величина рабочего тока после прекращения врез5 ной подачи монотонно уменьшается.For the operating voltage of the process of diamond contact-erosion treatment, one is chosen at which the value of the working current after the cut-in supply ceases to decrease monotonously.

Изобретение распространяется на схемы абразивного контактно-эрозионного шлифования, правки и профилирования алмазных кругов на металличесЮ кой связке, позволяет повысить качество обрабатываемой поверхности (отсутствие прижогов) при шлифовании, повысить точность получаемого профиля при профилировании и правке.The invention extends to schemes of abrasive contact-erosion grinding, dressing and profiling of diamond wheels on a metal bond, can improve the quality of the machined surface (no burns) during grinding, and increase the accuracy of the resulting profile during profiling and dressing.

Claims

11 The invention relates to mechanical engineering, in particular to electrical processing by abrasive contact-erosion grinding and contact-erosive straightening of diamond wheels on a metal bond. Purpose; Improving the quality and accuracy of the treated surface is achieved by selecting the operating voltage that prevents arcing between the electrodes by adjusting the treatment to determine the nature of the change in operating current after the cut-off supply stops. The method is carried out as follows. Adjustment cycles are performed to determine the operating voltage. Each cycle sets the voltage across the electrodes. In the process, the cut-in supply (the approach of the electrodes) is turned off without removing the voltage, and the nature of the change in the operating current is determined. For an arc process, it is characteristic that an abrupt change in the operating current, or its stable value, be observed when the infeed is turned on or when it is turned off. In this case, the voltage on the electrodes is reduced, and the adjustment processing cycle is repeated to determine the nature of the change in the magnitude of the operating current. 02 For the operating voltage of the diamond contact erosion process, one chooses such that at the value of the operating current monotonously decreases after the termination of the mortise feed. The invention extends to the schemes of abrasive contact-erosion grinding, dressing and profiling of diamond wheels on a metal bond, improves the quality of the surface to be machined (no burns) when grinding, and increase the accuracy of the resulting profile when profiling and dressing. Claims The method of determining the electrical mode of a diamond contact erosion treatment in direct current, characterized in that, in order to improve the quality of processing by eliminating the arcing between the electrodes, adjustments are carried out in cycles, in each of which the feeding of the electrotool for cutting is stopped. determine the nature of the change in the value of the operating current, and for the working value of the voltage is chosen such that at the value of the working current after the cut-off supply is discontinued monotonically less.