44results about How to "Avoid secondary cutting" patented technology

The invention discloses a semiconductor laser cutting MPW layout design method and a prepared chip and a terminal, belonging to the technical field of semiconductors. Perform logical operations at a safe distance and output a layout design sketch; evaluate the layout design sketch based on the difficulty of chip testing and / or wafer area utilization and / or cutting times, and then confirm the final layout design scheme. The invention can efficiently output all possible layout design sketches, has the characteristics of simplicity, effectiveness, easy operation, and strong practicability, provides a guarantee for quickly obtaining a more high-quality visual cutting scheme, and effectively avoids the possibility of product wafers in the production and cutting process. longer residence time and improve product production efficiency.

The invention relates to the technical filed of plate machining, in particular to an efficient plate shearing device for plate pieces. Through a contact switch, shifting between driving and positioning can be achieved, and with cooperation with a limiting assembly, displacement of the plate pieces can be limited, and therefore displacement of the plate pieces are the same, and secondary cutting isavoided. The limiting assembly achieves position adjustment and positioning through an adjusting cylinder, and therefore shearing requirements of different spaces of the plate pieces can be met. An upper compression roller is arranged at the cutting end, and therefore the plate pieces can be effectively limited without influence on cutting, and the problems caused by plate body upwarp during cutting are avoided. A delayed communicating device is arranged, when the contact switch is connected with driving roll shaft power, delayed communication is carried out, enough recovery time is providedfor a cutting assembly, collision with the cutting assembly caused by plate piece forward movement is avoided, and security is high.

The invention discloses a non-slitting construction structure of a concrete super-flat terrace. The construction structure comprises a concrete terrace and a terrace foundation poured in the concreteterrace, wherein the terrace foundation comprises a partition plate network, a terrace steel bar layer, and a supporting mechanism for supporting the partition plate network and the terrace steel barlayer; the supporting mechanism comprises a plurality of supporting rings arranged in an array mode; and an auxiliary supporting frame is arranged between every two adjacent supporting rings arrangedin the same row and between every two adjacent supporting rings arranged in the same column in the supporting mechanism. According to the construction structure, the super-flat terrace is subjected tonon-slitting construction by arranging the partition plate network, the terrace steel bar layer and the supporting mechanism for supporting the partition plate network and the terrace steel bar layer; the height of main supporting frames, transition supporting frames and the auxiliary supporting frames can all be adjusted through adjustment bases so as control the elevation of the partition platenetwork; and the surface finishing operability is controlled by using the partition plate network, the uncontrollable property of concrete surface finishing is effectively reduced, and the smoothnessof the concrete surface is improved.

The invention relates to the technical field of electric wires and cables, in particular to a synchronous peeling device for multi-strand electric wires and cables, which includes a processing box, a peeling part and a wire core conveying part. There is a peeling part in the box, and a wire core delivery part is installed at the right end of the processing box; the existing wire stripping machine has the following problems: the existing stripping machine cannot transmit and strip the wires of different diameters, so there are limitations; The stripping machine cannot segment the wire core, and needs to use special cutting equipment to cut the wire core twice, thereby increasing the process; the invention can cut wires of different diameters through the cutting knives located on the upper and lower sides of the wire; The invention can intermittently press and cut the stripped wire core into sections while stripping the wire, avoiding secondary cutting of the wire core, thereby reducing the process.

The invention provides a stitching device with a percussion locking unit; the stitching device comprises a stitching device body, and a pin ejector board and a release button arranged on the stitching device body; the release button is provided with a pin ejector board locking plate; the pin ejector board is provided with a pin ejector board boss; the far end of the pin ejector board locking plate abuts against the pin ejector board boss. In usage, a percussion handle is held to push the pin ejector board, thus driving a cutter to finish cutting; when the cutting is finished, the far end of the pin ejector board locking plate is joint with the pin ejector board boss, so the pin ejector board cannot return to the original state; even if the doctor re-hold the percussion handle, the pin ejector board cannot be pushed, thus preventing secondary percussion of the stitching device, preventing secondary cutting of the cutter, and avoiding medical accidents.

The invention discloses a helical tooth surface gear transmission pair and a tooth width geometric design method. The helical flank gear is staggered with a straight-tooth involute shaper. This kind of helical flank gear can only mesh with the spur gear, but cannot mesh with the helical gear with a helical angle. The tooth line is approximately an oblique line and forms an oblique angle with the radial direction, which is very suitable for the design diversification of the aviation compact space. The invention clarifies the tooth-shaping principle of the helical tooth surface gear of the helical gear, deduces the tooth surface equation of the helical tooth surface gear; uses the limit line of the involute gear shaper to find the position of the tangent point of the root of the inner end tooth ; Through the condition that the tooth thickness of the outer end tip is equal to zero, the condition of sharpening is obtained; then combined with the condition of avoiding the secondary cutting of the tooth root, the radius of the tip fillet is determined, and the tooth width of the helical flank gear is finally obtained.