摘要:
In a wire electrode feeding device in a wire cut electric discharge machine, a roller unit having a fluid inlet, a fluid outlet, and a rotor which is rotated by fluid supplied thereinto, a guide pipe connected to the fluid outlet of the roller unit, and a wire electrode winding mechanism provided near the fluid outlet of the guide pipe are used to convey and remove the wire electrode which is conveyed through a lower electrode guide and an electric feeder. As the fluid is supplied into the roller unit through the fluid inlet, the rotor is rotated, so that the direction of movement of the wire electrode is changed, and the wire electrode is conveyed through the fluid outlet of the roller unit and the guide pipe to the wire electrode winding mechanism by the fluid, thus being discharged out of the machine.
摘要:
A wire electrode supplying device in a wire cut electric discharge machining apparatus, which is capable of automatically supplying a wire electrode with accuracy during an automatic machining operation. In the wire electrode supplying device according to the present invention, an outside diameter of a pipe guide into which the wire electrode is inserted is changed stepwise, and its one end portion is made minimum in outside diameter so that the one end portion is allowed to be inserted into a machining start hole formed in a workpiece to be machined. Therefore, in machining a workpiece having a machining start hole small in diameter, the feeding of the wire electrode can be automatically, stably and accurately achieved.
摘要:
A wire electrode type electric discharge machining apparatus comprising a control means for controlling an interelectrode gap between a wire electrode and a workpiece to be machined to correct for a change which is caused by a change in the amount of machining removal at a corner. The machining accuracy of the wire electrode type electric discharge machining apparatus is remarkably improved.
摘要:
In a wire cut electric discharge machining method, feeding units having wire electrode feeding mechanisms are provided for wire electrodes different in diameter, respectively. The feeding units are moved, one at a time, to a wire electrode feeding path by cylinders coupled detachably to thereto, respectively, whereby the wire electrodes different in diameter are automatically replaced with each other, and machining conditions are automatically selected according to the diameter of a wire electrode and a machining process which are to be used. Therefore, the workpiece can be machined with the wire electrode most suitable for the given machining configuration. Thus, the method is high in machining accuracy and in machining efficiency.
摘要:
A wire cut electrical discharge machine includes a control device which corrects a change in the electrode side gap due to a change in the amount of removal in accordance with information relating to the machining operation provided beforehand and information indicating a current machining position and a current machining condition, thereby to improve the machining accuracy at the corner portion of the workpiece.
摘要:
A detecting unit for detecting when the wire electrode is released from a jet stream of a machining solution during the feeding of the wire electrode. Upon detection of the release of the wire electrode, the feeding of the wire electrode is suspended automatically to remove the deformed wire electrode.
摘要:
In an electric discharge machine in which electric discharge is cause to take place between a workpiece (6) and an electrode (1) such as a wire electrode or die sinking electrode which are confronted through a machining solution (7) with each other with a small gap therebetween while the electrode (1) and the workpiece (6) are moved relative to each other with drive shafts (37 and 67) such as ball screws, so that the workpiece (6) is machined as required; correcting data for the amounts of movement of the drive shafts are obtained under a plurality of different load conditions or temperature conditions and stored in a memory (41) in advance, and out of the correcting data thus stored, the most suitable ones for actual machining conditions are selected, so that amounts of movements to given to the drive shafts (37 and 67) are corrected according to the correcting data thus selected, whereby, even when the drive shafts (37 and 67) are expanded or contracted by the ambient temperature or deformed by a load such as the weight of the workpiece (6) or machining solution (7), the amounts of movement of the drive shafts (37 and 67) can be accurately corrected; that is, the relative position of the workpiece (6) and the electrode (1) is accurately corrected so that the workpiece is machined with high accuracy.
摘要:
An outboard motor includes a cooling water passage that guides cooling water to cool an exhaust passage and a cylinder unit. A cooling water intake port draws external cooling water into the cooling water passage. A water pump draws cooling water into the cooling water intake port and supplies the cooling water to the cooling water passage. A thermostat is arranged in the cooling water passage downstream of the catalytic converter and the cylinder unit. A first bypass passage is connected to a first connecting section provided on the cooling water passage. The first connecting section is provided along the cooling water passage at a position farther downstream than the catalytic converter and farther upstream than the thermostat.
摘要:
Provided is a seat pad 1 having a fastener member 4 on a front surface side of a pad body 2 made of a foaming resin, which includes: a ventilation member 5, one end portion of the ventilation member being located in the vicinity of the fastener member 4, and the other end portion of the ventilation member extending on a rear surface side of the pad body 2.
摘要:
An electrochemical cell including a fuel electrode having an interface with a fuel gas, a dense ion conductor (electrolyte) and an air electrode having an interface with air (oxygen) layered in this order, the fuel electrode and the air electrode are not in contact with each other and are separated by an electrolyte, and including a functional layer having a porous structure and promoting electrochemical reactions is layered on part or all of a fuel electrode surface that is an interface with the fuel gas. The electrochemical cell allows a high-efficiency electrochemical reaction system that utilizes a gaseous hydrogen fuel that significantly lowers resistance derived from internal diffusion of a gaseous hydrogen fuel gas in a fuel electrode, and makes it possible to achieve, at a single-cell level, a generation efficiency of 40% or more even in a medium-to-low-temperature region at or below 700° C.