42results about How to "The hole position is accurate" patented technology

The invention discloses a novel clamp. The novel clamp comprises a base; a fixed clamping plate is fixedly arranged on the top surface of the base; an elastic clamping mechanism matched with the fixedclamping plate to clamp pipes is arranged on one side of the fixed clamping plate; and a hole positioning mechanism is arranged on the top surface of the base. The novel fixture is good in fixing effect, is convenient for hole position adjustment in drilling operation, and has accuracy in drilling positioning.

The invention discloses a steel trestle construction method and facility with percussion drill limiting pore-forming implantation and a crawler crane combined. The construction method comprises the steps that construction is carried out from one end of a steel trestle to the other end of the steel trestle one by one so that the complete trestle can be constructed, and the next span of cantilever beret piece beam is formed on the previous span of steel trestle which has already been constructed; a limiting rack and a percussion drill are fixed to the next span of cantilever beret piece beam through double-buckling H-steel and deformed steel bar U-shaped clamps, and accordingly the plane position of the overhung limiting rack is located at the plane position of the next span of steel pipe piles of the steel trestle; a steel casing is placed in the limiting rack, and a hammer of the percussion drill hammers bedrock in the steel casing so that pile holes can be formed. According to the steel trestle construction method and facility, under the construction conditions of heavy flow of water and oblique river bed rock surfaces, there is no need for operators to drill a trestle pipe pile foundation by blasting through underwater operation, overwater equipment such as a ship does not need to enter the scene, the potential safety risks of operation by the operators and the ship under the condition of heavy flow of water are avoided, engineering cost is lowered, and construction safety is improved.

The invention discloses a large-scale flange type workpiece punching positioning device. The device comprises a horizontally arranged worktable; a vertically arranged drilling machine is arranged on the right side of the top surface of the worktable; a vertical positioning plate support is arranged on the left side of the drilling machine; a horizontal positioning plate is arranged in the positioning plate support; a positioning sleeve is arranged at the left part of the positioning plate; a round flange plate support is arranged at the left part of the positioning plate support; a flange plate is arranged at the upper part of the flange plate support; a central positioning pin is arranged at the center of the top surface of the flange plate; a horizontally arranged positioning rod is arranged at a relative position at the top of the flange plate; vertical through holes are formed in both ends of the positioning rod; a plurality of machining holes are uniformly formed in the circumferential direction of the flange plate; and an auxiliary support is arranged at a relative position at the lower part of the flange plate. The device has the beneficial effects of punching holes with accurate positions in the large-scale flange type workpieces and being simple to operate.

The invention discloses a rapid positioning and opening device for a thermoplastic film for radiotherapy, which comprises a sleeve with an open lower end; the sleeve is also provided with a liftable blade mounting plate and barbs, and there are multiple barbs. Each barb is located outside the blade mounting plate; a plurality of side pressure plates telescopic to the center of the sleeve are also installed on the side wall of the sleeve, and a detachable cutting blade and a lower pressure plate are installed on the blade mounting plate, and the lower pressure plate Located on the inside of the cutting blade. In the process of opening holes in the low-temperature thermoplastic memory film, the invention does not need to wait for the low-temperature thermoplastic memory film to cool, harden, and shape the patient's body surface, and can realize "online" hole opening at any position on the patient's body surface, and the low-temperature heat The plastic memory film is far away from the patient's body surface during the cutting process, and the patient's comfort is better; at the same time, the invention can quickly complete the opening process, reducing the waiting time of the patient and the workload of the technician, so that after the low-temperature thermoplastic memory film is opened The incision is regular and smooth, and the structure is simple and easy to operate.