34results about How to "Avoid following rotation" patented technology

The invention discloses a pneumatic and stable semiconductor wafer cutting device based on the principle of magnetic pole pressurization. In the middle of the surface of the base, the top and rear ends of the fixed base are provided with a gantry guide frame, and the bottom of the mobile platform is installed on the upper end of the gantry guide frame by means of snapping. The cutter of the present invention ensures the angle of the gravity cooler through the weight box, and the gas is pressurized and output by the rotary pressure plate, and the bottom of the cutting piece is aerated, so as to solve the problem that the chip raw material is cooled during the cutting process. The problem of water peeling, and the water cooling head is designed to be cooled on both sides, which effectively avoids the situation that the chip raw material is washed away by the cooling liquid, and improves the integrity of the wafer after cutting.

The invention provides a measuring, positioning and supporting device convenient to adjust and used for traffic construction. The device comprises a supporting plate, a mounting plate, a fixing bolt, a mounting frame, tool storage boxes, a side protection limiting frame structure, a lifting supporting frame structure, a contraction frame, a fixing bracket, an adjustable positioning bracket structure, a front side fixing plate, a fixing rod, a connecting ring, an auxiliary supporting rod and a pedal; the mounting plate is mounted at the lower part of the supporting plate through the fixing bolt; the mounting frame is welded at the lower part of the outer side of the mounting plate; and the tool storage boxes are embedded into the left side and the right side of the interior of the mounting frame correspondingly. According to the measuring, positioning and supporting device convenient to adjust and used for traffic construction, the inner side of a storage groove is in shaft connection with a limiting bracket, the limiting bracket can be conveniently used for limiting a rotary supporting plate during use, thus, after the limiting bracket is rotated upwards, the rotary supporting plate can be conveniently prevented from rotating on the outer side of a fixing shaft rod, and the positioning effect of the fixing bracket can be improved through the limiting bracket.

The invention discloses a seamless steel pipe welding equipment and a welding method thereof, comprising a support seat, a positioning plate is fixedly installed on both sides of the top of the support seat, and a fixed sleeve is fixedly installed inside the positioning plate, so that The internal thread of the fixed sleeve is connected with an adjustment rod, one end of the adjustment rod is rotated and installed with a clamping block, the other end of the adjustment rod extends to the outside of the fixed sleeve, and the front side of the middle end of the top of the support seat is fixedly installed with a fixed plate. In the present invention, one end of the steel pipe can be clamped and fixed by setting the adjusting rod and the clamping block, and the clamping part inside the clamping block is set in an arc shape which coincides with the shape of the steel pipe, which can ensure the stability after clamping, and at the same time Two clamping sleeves are set on the side of the support seat, which can fix the front end of the steel pipe after clamping. Not only the clamping effect is good, but also to ensure that there will be no shaking during welding, and the clamping distance can be adjusted according to the size of the steel pipe , Improve welding quality.

The invention discloses a punching device for an accounting book. The punching device comprises a base, a stand column, a drilling machine and a control switch, wherein the stand column is perpendicularly mounted on the upper part of the base; the upper end of the stand column is equipped with a spindle box; a worm is mounted inside the spindle box; one end side of the worm is connected with a pressing rod; the end side of the spindle box is equipped with a spindle; the position, which corresponds to the worm, outside the spindle is equipped with a gear ring in a surrounding mode; a blocking plate is arranged inside the spindle box; the gear ring is positioned between groups of blocking plates; the spindle is internally hollow; the drilling machine is fixedly mounted at the lower end inside the spindle; a limiting ring is arranged on the outer surface of the lower part of the spindle; the limiting ring is positioned on the outer part of the spindle box; the lower part of the limiting ring is equipped with four groups of extrusion springs at equal angles; the lower ends of the extrusion springs are connected with slide rings; the lower ends of the slide rings are equipped with fourgroups of ejector rods at equal angles; the bottom ends of the ejector rods are connected with a base plate; and the position, which corresponds to the rotary shaft of the drilling machine, of the middle part of the base plate is provided with a hole slot.