摘要:
A controller of a wire electric discharge machine monitoring a change in thickness of a workpiece and a current density in real time, promoting a machining speed by preventing occurrence of disconnection of a wire electrode even when the change in the thickness is caused in the workpiece and improving a dispersion in a machining enlargement amount. A machining distance calculating device outputs a signal at each progress of machining by a predetermined distance &Dgr;x. A main pulse number storing device counts a main pulse number for discharge machining outputted from a main pulse generator during a time period of the signal. A thickness calculating device calculates the thickness from a reference main pulse number in machining a reference thickness, the main pulse number stored to the main pulse number storing device and the reference thickness at each reception of the signal. The calculated thickness, further, a machining current, the machining speed and a machining current density are displayed. A discharge pause time control device changes a pause time period of voltage applied to the wire electrode and the workpiece in accordance with a thickness change rate and adjusts the machining current density such that no change is caused before and after the change in the thickness.
摘要:
A controller for a wire electric discharge machine which can achieve stable machining with high surface accuracy without requiring adjustment of a gain or the like in wire-electrode feed control. A discharge gap detection unit detects a voltage between a wire electrode and a workpiece. An amount-of-machining-per-unit-distance change detection unit obtains an average machining voltage, and a voltage drop EX that is a difference between the obtained average machining voltage and a no-load voltage. A comparative determination unit obtains a ratio ES/EX between a reference voltage drop ES stored in a reference-amount-of-machining-per-unit-distance relative value storage unit and the drop voltage EX. A feed pulse arithmetic unit obtains a feed speed that makes the amount of machining per unit time constant, on the basis of the ratio ES/EX and a predetermined feed speed, and distributes feed pulses to motors to thereby move the wire electrode relatively to the workpiece. Since the amount of machining per unit time is kept constant, the surface accuracy in finishing is high and stable machining can be performed.
摘要翻译:一种用于线放电机的控制器,其可以在不需要调整线电极馈送控制中的增益等的情况下以高表面精度实现稳定的加工。 放电间隙检测单元检测线电极和工件之间的电压。 每单位距离变化检测单元的加工量获得平均加工电压和作为获得的平均加工电压与空载电压之间的差的电压降E X 。 比较确定单元获得存储在参考加工量中的参考电压降E S S之间的比率E SUB / E×X - 单位距离相对值存储单元和下降电压E 。 进给脉冲运算单元基于比率E / S / E 和预定的进给速度来获得使每单位时间内的加工量恒定的进给速度 并且将馈送脉冲分配给电动机,从而相对于工件移动线电极。 由于每单位时间的加工量保持恒定,所以精加工中的表面精度高,可以进行稳定的加工。
摘要:
A discharge pulse number generated between a wire electrode and a workpiece is counted every predetermined time. A ratio Px/Ps of this counted value Px to the reference pulse number Ps will be determined to control an amount of coolant in response to this ratio Px/Ps. Also, in response to this ratio Px/Ps, an amount of movement within predetermined time is controlled. Further, through the ratio Px/Ps and the like, quiescent time to be controlled by the detection voltage generator is controlled. Thereby, surplus supply of energy is prevented, the machining speed and machining precision is improved and any disconnection of the wire electrode is avoided.
摘要:
A discharge pulse number generated between a wire electrode and a workpiece is counted every predetermined time. A ratio Px/Ps of this counted value Px to the reference pulse number Ps will be determined to control an amount of coolant in response to this ratio Px/Ps. Also, in response to this ratio Px/Ps, an amount of movement within predetermined time is controlled. Further, through the ratio Px/Ps and the like, quiescent time to be controlled by the detection voltage generator is controlled. Thereby, surplus supply of energy is prevented, the machining speed and machining precision is improved and any disconnection of the wire electrode is avoided.
摘要:
A discharge pulse number generated between a wire electrode and a workpiece is counted every predetermined time. A ratio Px/Ps of this counted value Px to the reference pulse number Ps will be determined to control an amount of coolant in response to this ratio Px/Ps. Also, in response to this ratio Px/Ps, an amount of movement within predetermined time is controlled. Further, through the ratio Px/Ps and the like, quiescent time to be controlled by the detection voltage generator is controlled. Thereby, surplus supply of energy is prevented, the machining speed and machining precision is improved and any disconnection of the wire electrode is avoided.
摘要:
A photoelectric conversion apparatus at least includes an insulating film, a plurality of high-refractive-index members provided so as to correspond respectively to individual photoelectric conversion portions, being surrounded by the insulating film and having a refractive index higher than the refractive index of the insulating film, and a high-refractive-index film provided on the insulating film so as to connect the plurality of high-refractive-index members to one another and having a refractive index higher than the refractive index of the insulating film, and lens portions lying next to each other from among a plurality of lens portions border each other.
摘要:
An image measurement apparatus includes: an imager section, an obtainment section, an outline detection section, a setting section, and a measurement section. The imager section takes an image of a subject to be measured. The obtainment section obtains a taken image of the subject taken by the imager section. The outline detection section detects, by a Hough transformation, outline of a graphic included in the image obtained by the obtainment section. The setting section sets an edge detection tool on the outline detected by the outline detection section. The measurement section measures, by the edge detection tool set by the setting section, graphic information concerning the graphic.
摘要:
A method of generating photomask data for fabricating a microlens array, the photomask having a microlens pattern including light-shielding portions and non-light-shielding portions, a rectangular region including a surrounding region having four sides of the rectangular region as outer edges and a primary region having boundaries that are inner edges of the surrounding region, the surrounding region being configured by four strip regions each including one of the four sides as its part, and a width between each outer edge and each corresponding inner edge being not more than 1/2 of a wavelength of exposure light. The method includes determining a layout of light-shielding portions and non-light-shielding portions in the surrounding region so that a density of light-shielding portions is set to fall within a range from 0% to 15%.
摘要:
A photoelectric conversion apparatus at least includes an insulating film, a plurality of high-refractive-index members provided so as to correspond respectively to individual photoelectric conversion portions, being surrounded by the insulating film and having a refractive index higher than the refractive index of the insulating film, and a high-refractive-index film provided on the insulating film so as to connect the plurality of high-refractive-index members to one another and having a refractive index higher than the refractive index of the insulating film, and lens portions lying next to each other from among a plurality of lens portions border each other.
摘要:
A CPU 290 of a recording/reproducing device 200 make a recording section 251 record contents reserved by a user for video recording in an HDD 270, and sets remaining time until the contents is automatically deleted. The CPU 290 determines, when a period T is over, whether access to the contents has been carried out or not, and adds additional time D to the remaining time when the CPU 290 determines that the access has been made, and subtracts the period T from the remaining time when the CPU 290 determines that the access has not been made. The CPU 290 executes the afore-mentioned processing once in each period T, and automatically deletes the contents from the HDD 270 when the CPU 290 recognizes that the remaining time is zero or below.
摘要翻译:记录/再现装置200的CPU 290使记录部分251记录用户在HDD 270中保存用于视频记录的内容,并设置直到内容被自动删除的剩余时间。 CPU 290在周期T结束时确定是否已经执行对内容的访问,并且在CPU 290确定进行访问的剩余时间中添加附加时间D,并且减去周期T 从CPU 290确定尚未进行访问的剩余时间。 CPU 290在每个周期T中执行上述处理一次,并且当CPU 290识别出剩余时间为零或更低时,自动从HDD 270删除内容。