2results about How to "Increase working hours" patented technology

The present application relates to an electrode device for electric discharge machining and an electric discharge machining device. The electrode device for electric discharge machining comprises a planar substrate, a first electrode plate attached to one of two opposite sides of the planar substrate, the first plate shape having at least one edge, a first electrode provided on a radially outer side of the at least one edge facing the first electrode plate, the first electrode having a first electrode shape matching a shape of a first machining feature of a workpiece to be electric discharge machined, and a second electrode plate attached to the other of the two opposite sides of the planar substrate, the second plate shape having at least one edge, a second electrode provided on a radially outer side of the at least one edge facing the second electrode plate, the second electrode having a second electrode shape matching a shape of a second machining feature of the workpiece. The technical solution improves the electrode structure and allows simultaneous machining of multiple workpieces.

The application belongs to the technical field of building construction, and discloses a door hole and a construction method for a heading machine to enter and exit a hole. The door hole comprises an outer sleeve and an inner sleeve. The outer sleeve is fixed on a reinforcement cage of an underground continuous wall, and the axial direction of the outer sleeve is arranged at an angle with the extension direction of the underground continuous wall. Both ends of the outer sleeve are exposed to the reinforcement cage, and a heading channel is arranged in the outer sleeve and penetrates the outer sleeve along the axial direction of the outer sleeve. The inner sleeve is arranged in the outer sleeve and is used for plugging the heading channel. The inner sleeve is detachably connected with the outer sleeve. The concrete of the underground continuous wall covers the outer sleeve and the inner sleeve. The door hole is preset on the underground continuous wall. Before the heading machine enters and exits the hole, the inner sleeve is removed, and the heading machine enters and exits the hole through the heading channel in the outer sleeve. Compared with the prior art, the door hole can quickly break the door hole when entering and exiting the hole, improves the construction efficiency, and reduces the safety risk.