8 results about "Alpha angle" patented technology

The application relates to the technical field of machining, in particular to a laser cutting method, which comprises the following steps: turning over a blank to a position where a first plane of the blank is at an alpha angle with a horizontal machining surface, and the first plane is arranged to be inclined downward along a first edge of the first plane towards a second edge of the first plane; starting a laser, the laser is incident in a vertical direction, and the first edge of the first plane of the blank is laser cut until the cutting depth reaches half of the thickness of the blank; turning over the blank again to the position where the first plane of the blank is at the alpha angle with the horizontal machining surface, and the first plane is arranged to be inclined upward along the first edge of the first plane towards the second edge of the first plane; starting the laser, the laser is incident in the vertical direction, and the first edge of a second plane of the blank is laser cut until the blank is cut through. It can be seen that the laser cutting is performed on two sides, the machining difficulty is reduced, the production efficiency, machining precision and product quality are improved, and micro cracks caused by excessively high cutting temperature can be avoided.

The utility model relates to the field of makeup auxiliary tools, in particular to an auxiliary tool for using a double-fold eyelid sticker. The auxiliary tool for using the double-fold eyelid sticker comprises a linear main body, one end of the main body is integrally provided with a Y-shaped fork, the Y-shaped fork integrally inclines towards one side of the main body by an angle alpha, alpha is larger than or equal to 25 degrees and smaller than or equal to 35 degrees, and the other end of the main body is provided with a pointed end used for picking. The tool has the advantages that the structural design is simple and reasonable, the special Y-shaped fork orientation design enables the tool to be staggered and avoided during use, the tool and an operating hand are prevented from blocking sight, and judgment and use experience cannot be affected.

The utility model belongs to the vehicle exhaust system of vehicle exhaust system technical field's vehicle exhaust system water crossing waterproof structure. The mounting seat (310) of switching valve body (3) is provided with the pivot shaft (33) extending to the inside of casing channel (37), the pivot shaft (33) and casing axial center line (38) are alpha angle, the sealing ring (36) is perpendicular to casing axial center line (38) arrangement, the pivot shaft (33) and sealing ring (36) are beta angle, the inner ring of casing channel (37) is provided with sealing ring (36) along a week, the pivot shaft (33) is sleeved in the mounting sleeve (39) of valve plate (34), and the mounting sleeve (39) is located one side of valve plate (34), and the sealing ring (36) is located the other side of valve plate (34). The utility model discloses the vehicle exhaust system water crossing waterproof structure, simple structure, when the vehicle even floats water through the waterproof structure closing and realizes the exhaust system sealing when the vehicle water crossing, and the waterproof valve sealing area and pivot shaft are respectively placed in the two sides of valve plate, do not need to consider the sealing at pivot shaft, and effectively improve the sealing performance.

The utility model belongs to the technical field of corn header dividers, and particularly relates to a fully compatible corn header middle divider which comprises a divider assembly, the divider assembly comprises a connecting section and a pointed section, a reducing chamfer is arranged at the connecting end of the connecting section and the pointed section, and the length of the divider assembly is shortened through the reducing chamfer; according to the fully-compatible middle divider for the corn header, chamfering and reducing treatment is carried out on the middle cover of the header, so that the length of a divider assembly is shortened to a certain extent, the length of a machine tool is reduced, and the machine tool can work more flexibly; in addition, the alpha angle and the beta angle are subjected to corresponding optimization design, so that the feeding effect is improved, the loss rate of clusters is reduced, and meanwhile blockage is effectively avoided.

The application relates to a stepless speed change device capable of self-adaptive adjustment, comprising a transmission belt and two speed change wheel groups, wherein the speed change wheel group comprises a rotating wheel, a positioning disc, a wheel shaft, an elastic structure and a combined variable-diameter transmission wheel composed of N transmission pieces; the rotating wheel is fixed in the circumferential direction of the wheel shaft, and the end surface of the rotating wheel is provided with N first strip-shaped grooves; the positioning disc is rotatably installed on the wheel shaft, and the end surface of the positioning disc is provided with N second strip-shaped grooves; the second strip-shaped grooves and the first strip-shaped grooves one-to-one correspond to form N positioning groove groups; the transmission piece is provided with a transmission part and a limiting rod; the limiting rods of the N transmission pieces are respectively located in the first strip-shaped grooves and the second strip-shaped grooves of the N positioning groove groups, and can slide in the first strip-shaped grooves and the second strip-shaped grooves; the limiting rod cannot rotate or can only rotate an alpha angle in the first strip-shaped groove; and the elastic structure can drive the N transmission pieces to move to the outer edge of the rotating wheel; the transmission belt is sleeved with the two combined variable-diameter transmission wheels at two ends respectively, and the transmission belt is in friction or meshing transmission with the transmission part.

The utility model discloses an automobile exhaust pipe flange face drilling clamp which comprises a workbench, the workbench is provided with a plurality of stations used for installing an exhaust pipe body, and each station comprises an installation base, a pressing device movably connected with the installation base and a U-shaped fixing frame arranged on the side of the installation base. A floating disc correspondingly matched with a circular port of an exhaust pipe body is movably arranged on the mounting base, the U-shaped fixing frame is used for positioning a tubular part, the upper surface of the workbench is horizontally arranged, and the upper surface of the mounting base and the upper surface of the workbench are arranged at an angle alpha; the opening end face of the inclined port of the installed exhaust pipe body is parallel to the upper surface of the workbench. The exhaust pipe body is positioned and fixed in multiple directions through the installation base, the pressing device, the U-shaped fixing frame and the floating disc, the effects of being firm in clamping and high in stability are achieved, the exhaust pipe body is not prone to loosening in the machining process, and therefore the machining precision is improved.

The application discloses a folding axis system alignment method and system for off-axis optical path, and belongs to the technical field of optical mechanical adjustment. First, the optical axis of an inner focusing telescope is made to coincide with the center axis of a first lens frame by using the inner focusing telescope and a first centering mirror tool. Then, an accurate alpha angle folding optical path is established by using an isosceles prism with a top angle of alpha and a second centering mirror tool. The placement position of the isosceles prism and the mounting position of a second lens frame are finely adjusted, so that the optical axis of the inner focusing telescope coincides with the center axis of the second lens frame after being folded by the alpha angle. Thus, the accurate alignment of the center axes of the first lens frame and the second lens frame is realized. The method applies the good linearity of the optical axis of the inner focusing telescope and the easy folding characteristics of the optical path to the accurate alignment of the folding axis system. By switching the isosceles folding prisms with different top angles, the accurate alignment of the folding axis system with different folding angles can be realized. The equipment cost is controlled while the alignment precision is ensured, and the structure is simple and easy to operate.