51results about How to "Avoid drilling deviation" patented technology

The invention provides a drill hole positioning device which comprises a positioning part, a guiding frame and a guiding cylinder. The positioning part is provided with a concave positioning area matched with the outer surface of a workpiece to the machined. The guiding frame is connected to the positioning part. The guiding cylinder is connected with the guiding frame in the guiding direction in a rectilinear motion mode, and is provided with an inner hole for being connected with an electric drill so that the drill bit of the electric drill can penetrate through the inner hole and extend towards the concave positioning area. The drill hole positioning device can effectively prevent the drill hole deviation caused by the sliding of the hand-operated electric drill in the process of pipeline part drilling, and the precision of a matched hole is improved.

The invention discloses an automatic punching machine for a pantograph slide plate aluminum support and a punching method of the machine. The automatic punching machine for the pantograph slide platealuminum support comprises a base, a sliding groove is formed in the top of the base, a same limiting rod is welded to the inner walls of the two sides of the sliding groove, two symmetrical clampingplates slidingly sleeve the limiting rod, two pressing plates are welded to the sides, close to each other, of the two clamping plates and located above the base, two limiting holes matched with the limiting rod are formed in the sides, close to each other, of the two clamping plates and slidingly connected with the limiting rod, a groove is formed in the inner wall of the top of each limiting hole, and a first groove is formed in the bottom of each pressing plate. The machine is reasonable in design and simple in structure, the pantograph slide plate aluminum support can be stably and fixedlyclamped and positioned, when the pantograph slide plate aluminum support is punched, the position deviation is prevented, the punching position deviation is prevented accordingly, and the accuracy ofthe punching position is improved.

The invention discloses a fixture for conducting rough machining on water plugging holes of an engine cylinder block. An engine cylinder block to be machined is placed on a supporting plate. The engine cylinder block can conduct slippage on a base along with the supporting plate, so that feeding and discharging of a cylinder block piece are facilitated. When machining is conducted, a clamping device clamps the engine cylinder block to the supporting plate, meanwhile a locking portion locks the supporting plate and the base, it is guaranteed that in the drilling process of a drill bit is guaranteed, the cylinder block cannot waggle, and drilling deviation is avoided. A guide device plays a guide function on the drill bit of a radial drilling machine, and drilling accuracy is guaranteed.

The invention provides a hole flushing device for coal mine downhole gas extraction drill holes. The hole flushing device comprises a water tank, a high-pressure pump, a high-pressure hard pipe, a high-pressure hose, a self-propelled drill bit, a base, a winch, a pushing mechanism and the like. The winch and the pushing mechanism are fixed to the base. The device can correspond to the drill holes in different positions and at different angles by adjusting all parts of the base. The high-pressure hard pipe can penetrate through the pushing mechanism before being fed into the drill holes. The high-pressure hard pipe can be conveyed forwards along the drill holes through pushing force provided by the pushing mechanism. When high-pressure water passes through the high-pressure hose at the front end of the high-pressure hard pipe and the self-propelled drill bit, high-pressure water jet is generated to conduct rock breaking dredging on collapsed and blocked portions, and self-propelling force is generated. The device is simple in structure, small in overall size and convenient to adjust, and can be conveniently used in coal mine downhole narrow working space. A whole power pipeline can be conveyed in long distance under joint acting force of pulling in front and pushing behind, and the pipeline can be prevented from being clamped. The hole flushing speed is high, efficiency is high, cost can be greatly reduced, and the gas extraction effect is improved.