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13553results about "Maintainance and safety accessories" patented technology

Positioning device having two object holders

A positioning device has first and second object holders that are guided over a guiding surface extending parallel to an X-direction and parallel to a Y-direction perpendicular to the X-direction and which are displaceable over the guiding surface from a first position into a second position by means of a displacement system. The displacement system includes a first displacement unit and a second displacement unit to which the object holders can be alternately coupled. The first displacement unit is suitable for carrying out a first series of positioning steps of the first object holder in the first position and for displacing the first object holder from the first position into an intermediate position between the first and second positions. The second displacement unit is suitable for carrying out a second series of positioning steps of the second object holder in the second position, simultaneously with and independently of the first displacement unit, and for displacing the second object holder from the second position into the intermediate position. In the intermediate position, the object holders are exchanged, after which the first series of positioning steps can be carried out by the first displacement unit with the second object holder in the first position and the second series of positioning steps can be carried out by the second displacement unit with the first object holder in the second position. The positioning device is suitable for use in a lithographic device to carry out an exposure process with a first semiconductor substrate in an exposure position and, simultaneously therewith and independently thereof, a characterization process with a second semiconductor substrate in a characterization position.
Owner:ASML NETHERLANDS BV

Pocket hole drilling machine

A pocket-hole drilling apparatus for drilling pocket-holes in a workpiece is disclosed. In one embodiment, an initiation switch actuates clamping the workpiece and the movement of a drilling module to cut a pocket-hole. The drilling module has a motor and a step-drill mounted thereon, which is slidably mounted on a guide module. The axis of the drilling module movement intersects work surface. In another embodiment, a movable fence provides the adjustability of pocket-hole depth. In yet another embodiment, two actuator tips are disposed in a fence to prevent the drilling of a pocket-hole through the sidewall of a workpiece. In still another embodiment, a short stroke clamping actuator is used to prevent human finger injury. In still another embodiment, a blower or an ejector pump is used to remove wood chips, wherein the blower is either attached to a drilling motor or to a separate blower motor; the ejector pump is mounted near the drill guide. In still another embodiment, two pocket-drills are slidably mounted on a block so as to drill two pocket-holes and to adjust pocket-hole spacing. In still another embodiment, a mounting structure is disposed either underneath or above the work surface to mount drilling module(s) so as to drill multiple pocket-holes into a wide workpiece at one setup. In still another embodiment, a drill guide forms a clearance for the cutting edges of the step-drill to minimize wear on the edges. In a further embodiment, an actuator provides both clamping and drilling movements, wherein the actuator is an electric motor or a hand lever.
Owner:KREG ENTERPRISES

Numerically controlled drilling and milling processing method for runner of blisk of engine

The invention provides a numerically controlled drilling and milling processing method for a runner of a blisk of an engine. The main technical flow before drilling and milling the runner comprises the following steps: lathing each surface of a blank, performing nondestructive testing, lathing inner and outer cavities of the blisk, finely milling a needed periphery and an axial benchmark, drilling and boring an angular datum hole, drilling and milling the runner and inspecting. A part and a fixture are in peripheral seam allowance fit to limit a radial degree of freedom of the part; an end face gland and a central pull bar axially limit an axial degree of freedom of the part; and a precise positioning pin angularly limits an angular degree of freedom of the part. The method has the advantages that: by applying the drilling and milling processing method to a part machining process of the blisk of the engine having the material removing rate of over 90 percent, the method improves the processing efficiency, shortens the manufacturing period of the product, and provides a new technical means for removing a large amount of remainder materials of the blisk; and the processing of a high-temperature alloy, a titanium alloy and other difficult-to-process materials shows that the material is more difficult to process, the removing rate is bigger and the effect is more obvious.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION

High-accuracy hole forming device for aircraft wall panel and a method of high-accuracy hole forming device

The invention provides a high-accuracy hole forming device for an aircraft wall panel and a method of the high-accuracy hole forming device. A main shaft module is used for feeding an electric main shaft along a hole forming axis; a feeding module is used for guaranteeing movement of the main shaft module and a pressure pin normal leveling module in the hole forming axis and providing pressure for a pressure pin to be abutted against the wall panel; the pressure pin normal leveling module is used for guaranteeing the stability of the wall panel in the hole forming process; the feeding module is matched with a grating scale module for work to realize accurate control over the hole forming feeding displacement; a visual alignment module and a control system form a closed loop feedback loop; positional deviation error of a projection point of a hole forming main shaft on the wall panel surface and an actual hole forming point can be measured and fed back in real time; and correction is performed through the closed loop system to guarantee that the positional accuracy of a formed hole is within a tolerance requirement range. According to the high-accuracy hole forming device, the positional accuracy, the surface roughness and the dimensional accuracy of the hole can meet the design requirements well; and meanwhile, slanting holes and oblique holes are not formed in the hole forming process, the temperature of a hole forming region is kept at a normal working temperature and the chip removal is normal.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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