63results about How to "Small feed" patented technology

When a relatively large image in the sub-scanning direction is to be printed, a relatively large number of dot-forming elements among a plurality of dot-forming elements are used to form dots by means of sub-scanning with a relatively large average feed. When a relatively small image in the sub-scanning direction is to be printed multiple times at different positions in the sub-scanning direction on the same print medium, a relatively small number of dot-forming elements among the plurality of dot-forming elements are used to form dots by means of sub-scanning with a relatively low average feed. With this embodiment, large images are rapidly printed, and small images are printed more efficiently on printing paper.

The invention discloses a moving platform for taking and placing stored goods and a route planning method of the moving platform. The moving platform comprises a moving platform body, an obstacle avoiding device, a mechanical arm device, a goods placing device, a goods recognition device and a goods grabbing device. The obstacle avoiding device, the mechanical arm device and the goods placing device are installed on the moving platform body. The goods grabbing device is installed at the tail end of the mechanical arm device. The goods recognition device is installed on the goods grabbing device. The mechanical arm device comprises a rotating mechanism and multiple mechanical arms. The multiple mechanical arms are mutually connected in a rotating manner. The multiple mechanical arms form one modularized mechanical arm. One end of the first mechanical arm is fixed to the rotating mechanism. The tail end of the last mechanical arm is fixed to the goods grabbing device. According to the method, the improved dynamic window method is adopted for adjusting three weights for evaluating a function in real time, the adaptation ability of the moving platform to the environment is improved, and the success rate of the moving platform reaching the designated position point is ensured.

The invention discloses a preparation method of a strontium aluminum alloy with a high strontium content, and belongs to the technical field of preparation of alloy materials. The preparation method specifically comprises the following steps: firstly, an aluminum block is preheated; then, under inert gas shielding, a strontium block is heated for melting to obtain strontium solution; a covering agent is added in the surface of the strontium solution; the strontium solution keeps the temperature; then, under inert gas shielding, the preheated aluminum block is pressed in the strontium solution for totally melting; the mass ratio of the pressed aluminum block to the strontium solution is 1: 14-1: 0.9; then, a refining agent is added for degassing, stirring and smelting to obtain strontium aluminum alloy liquid; and finally, under inert gas shielding, the strontium aluminum alloy liquid is heated for keeping the temperature at 700-900 DEG C, and is cast to obtain the strontium aluminum alloy. The strontium aluminum alloy, prepared by adding the preheated aluminum block in the strontium solution, is uniform in components, the content of effective component-strontium reaches 47-93%, and the melting point is only 580 DEG C, so that the production energy consumption of users can be reduced; and the strontium aluminum alloy is an excellent high-density modifying agent for casting an aluminum alloy.

The invention provides a method of cutting and squaring a single crystal silicon round rod by utilizing a diamond line. The method utilizes high-speed feeding of the diamond line to cut the single crystal silicon round rod and comprises the following concrete steps of (1) wire winding: winding a diamond wire to form a wire net of a well-shaped structure after the diamond passes through a cutting wheel and guide wheels; (2) crystal rod mounting: mounting a crystal rod on a workbench, enabling the diamond cutting wire to form a field angle between the crystal rod and each of the guide wheels at the front, the back, the left and the right of the crystal rod; (3) parameter setting: setting a line tension, a feeding speed and a new wire feeding quantity according to the diameter of the crystal rod; (4) cutting: carrying out continuous cutting through relative movement of the diamond cutting wire and the single crystal round rod to be cut; and (5) finishing cutting, and ending a program. The method has the advantages that the feeding speed is increased, the new wire feeding quantity and the steel wire consumption quantity are reduced, and the quality of a quasi-square rod subjected to squaring is in a controlled state.

The invention provides a method for machining a variable cross-section dovetail blind groove of a composite material, and belongs to the technical field of machining. The method includes the steps that a rough machining tool, a semi-finishing tool and an insert block are manufactured; the rough machining tool is used for removing the large allowance to form a rectangular cross-section groove; the semi-finishing tool is used for conducting transverse cutting feed from the outer side of the cross section of the rectangular cross-section groove, the tangent line of the maximal turning circle of the tool is located on the groove bottom face contour line of the variable cross-section dovetail blind groove, the allowances of the blind end face and the two side faces of the rectangular cross-section groove are removed, and accordingly a variable cross-section dovetail blind groove workblank with the allowance being reserved at the blind end included angle position is formed; and the insert block is embedded into the variable cross-section dovetail blind groove workblank, the allowance at the blind end included angle position of the variable cross-section dovetail blind groove is removed and a workpiece with the variable cross-section dovetail blind groove can be obtained. By the adoption of the machining method provided by the invention, overcut of the blind end is avoided; the tool durability is effectively improved, and production cost is reduced; and corner chipping happening in the machining process of the workpiece dovetail groove is prevented.