35results about How to "Guarantee the quality of the machined surface" patented technology

The invention discloses a rotary press table for machining laminated polarizers in middle and small size. The rotary press stable solves the problems of complicated structure, low positioning precision and inconvenience in operation of the existing equipment and comprises a framework, an upper rotary table and a lower rotary table. The upper rotary table is fixedly arranged on a horizontal cross beam on the upper portion of the framework. A direct-drive motor rotary table which is hollow is arranged on the upper portion of an upper rotary table fixed plate, a spline shaft of a ball spline pair penetrates through a center hole of the direct-drive motor rotary table and the center of a spacer sleeve, the upper end of the spline shaft is connected with a push rod of an air cylinder through a spline connecting flange, two thrust bearings, a transfer shaft and a floating joint, and the lower end of the spline shaft is connected with an upper press head through an upper press head connecting flange. The lower rotary table is fixedly arranged on a bottom frame of the framework through a lower rotary table fixed plate, and the other direct-drive motor rotary table is fixedly arranged on the lower rotary table fixed plate. By the rotary press table, a stack of laminated polarizers can be pressed, positioned accurately and rotate synchronously.

The invention relates to a laser heating auxiliary micro-turning fixture and a laser heating auxiliary micro-turning method and belongs to the field of auxiliary processing of machine tools, and the device and the method are used for solving the problems of poor processed surface quality, tool abrasion and tool breakage existing in the prior art. The device comprises a rotary sliding table, a translation sliding table, a laser and a clamp, wherein the translation sliding table is fixedly arranged on a Y-directional sliding table; the rotary sliding table is fixedly arranged on the translation sliding table; the laser is fixedly arranged on the rotary sliding table by virtue of the clamp; the axis of a gun head of the laser and a vertical surface in which the tool tip of a tool of a machine tool is located are coplanar. According to the method, rays of the laser are applied to the front end of a micro tool tip, and local preheating for a to-be-processed workpiece by virtue of lasers is realized. The laser and the micro-turning device are combined for preheating the to-be-processed workpiece, so that the micro-turning for a difficult-to-process material is realized, the quality and size precision of a processed surface are ensured, the cutting force is reduced, and phenomena of serious tool abrasion and tool breakage substantial results are improved; a camera is used for monitoring in real time, so that the precise and reliable micro diameter of a laser spot can be ensured.

The invention relates to a composite machining method for high-volume aluminum-based silicon carbide threaded holes. The threaded holes of standard specifications are machined on aluminum-based silicon carbide materials with a volume fraction higher than 50%, and the milling-grinding integrated composite machining based on multi-dimensional ultrasonic vibration is used. The method fully combines the advantageous processing methods of difficult-to-machine materials, such as grinding, ultrasonic vibration processing, and high-precision milling of threads. Through tool design and process parameter optimization, the current processing technology can reduce the loss and breakage of SiC particles during processing in the current processing technology. Unfavorable processing effects caused by other reasons, improve the quality and efficiency of thread processing.

The present invention proposes a method for machining inner circular grooves of spiral bevel gears. Compared with the traditional processing method based on the original circular groove type direct circular cutting, this method changes the processing path. The straight line arc of the inner circular groove and the angle connecting arc are selected to form several steps, and the processing of the inner circular groove is simplified into a three-step process according to the shape of the inner circular groove. Semi-finishing circular arc groove shape, finishing circular arc groove shape, designing an effective groove path to cut off the horizontal curl of iron chips can improve the chip breaking situation and reduce the occurrence of chip entanglement. The method of the invention is simple and easy to implement, can ensure the quality of the processed surface, and further improve the efficiency of processing and clamping and changing production.

The invention belongs to the field of mechanical manufacture cutting cutters, and in particular relates to a SiZrCN gradient composite coating cutter and preparation method thereof. The coating is the SiZrCN gradient composite coating prepared by adopting a composite coating method of unbalanced magnetron sputtering and electric arc plating; the surface of the coating cutter is SiZrCN gradient composite coating with gradually-changed gradient of nitrogen content, a Ti transition layer and a SiZrC transition layer are sequentially arranged between a cutter base body and the coating. By adopting the SiZrCN ultra-hard carbon-nitrogen compound coating, because two metals including Si and Zr are added in the coating at the same time, the nitrogen content of the coating structure component is gradually changed in a gradient manner, so that the cutting machining performance of the cutter can be improved. The coating has high hardness and heat stability, and also has good diffusion prevention and wear prevention performances, good plastic deformation resistance ability and excellent friction and wear resistance property. In the cutting process, the cutter can effectively prevent the occurrence of cracking of cutting edges and hot cracks, guarantee the machining surface quality of the workpieces, and prolong the service life of the cutter by more than 70%.

The invention discloses an ultrasonic cutting and polishing machining system. The ultrasonic cutting and polishing machining system comprises an ultrasonic transducer, an amplitude transformer, and awiper blade cutter, wherein the front end of the ultrasonic transducer is tightly and reliably connected with the rear end of the amplitude transformer; the ultrasonic transducer is connected with anultrasonic power supply through a lead; a flange plate is arranged at the vibration displacement node position of the amplitude transformer; the flange plate is connected with a B-axis rotary tool rest through a supporting plate; and the wiper blade cutter is tightly and reliably connected with the front end of the amplitude transformer. According to the ultrasonic cutting and polishing machiningsystem, ultrasonic high-frequency vibration in the feeding direction of the cutter can improve the action length of a wiper blade, reduce the generation of secondary tool marks on the machining surface of the wiper blade, and improve the quality of the machined surface; due to the cleaning effect of the ultrasonic vibration, it is difficult to generate chip accumulation at the wiper edge, and thequality of the machined surface is better guaranteed; the ultrasonic vibration changes the contact state and action mechanism between the cutting edge and the wiper edge and the material to be machined, reduces the cutting force and the cutting temperature, and improves the surface quality after the cutting edge is processed, and thus the quality of the machined surface is further improved due tothe combined action of the polishing edge and the ultrasonic vibration.

The invention discloses a PCBN blade with a combined cuttings-guiding structure. On the basis of an original blade, two rotatable cuttings-guiding sheet bodies are additionally arranged on a cutter body and are the upper cuttings-guiding sheet body and the lower cuttings-guiding sheet correspondingly, and the two cuttings-guiding sheet bodies are each provided with two types of cuttings-guiding cutter-edge shapes such as the circular arc shape, the broken line shape, the triangle and the linear circular arc shape; compressing washers are arranged at the centers of upper parts of the two cuttings-guiding sheet bodies, and fixing chunk devices are mounted on the two sides of a rotating center. According to the PCBN blade with the combined cuttings-guiding structure, in order to meet the cuttings-guiding needs of hard cutting machining, lower the production cost of cutters and realize quick replacing, the same blade can be used in various machining conditions, and the using efficiency isimproved; and the PCBN blade provides a new cutter design thought for coordinating cutting flow and improving the surface machining quality.