Many small partners will choose some high-end furniture when decorating. The sofa is the main furniture in the living room. In the purchase, many small partners will focus more on leather reclining sofas, which not only has a sense of grace and luxury but also improves the overall home improvement Designed taste. However, because leather sofas are more expensive, daily maintenance is also necessary to extend the life of leather sofas.
So, how to deal with the leather sofa in daily maintenance?
First point: set up a leather sofa, don't rush to use it
The first step of sofa maintenance begins after the sofa is installed. After purchasing the sofa, do not use it immediately. Be sure to wax the surface of the leather sofa. Professional leather sofa maintenance wax can form a protective film on the sofa surface. This protective film can also relieve the oxidation and aging of the leather sofa.
After that, use a relatively soft cloth, dipped in a small amount of warm water and wipe it on the surface of the sofa. You can use the professional cloth provided by the sofa to clean it. In addition, during daily maintenance, try not to use detergents with chemical additives to avoid damage and erosion to the sofa's cortex.
Second point: cleaning up daily stains
The leather sofa will inevitably be splashed with grease and stains during use. When cleaning, you can use a softer cloth and dip some soapy water on the stained surface to wipe it. If there is some grime on the surface of the sofa, you can use wind oil essence, oily cream, hot milk toothpaste, etc. to apply on the surface, and then use a cloth dipped in warm water to simply wipe the surface and mail order. It can also be easily removed. .
Third point: small areas of damage can be repaired by themselves
For families with pets, small areas of damage and scratches often occur on leather sofas. For minor damage, friends can repair it by themselves. Stir with egg whites and pigments and apply evenly on the damaged area. If the damage area is large, you still need to ask a professional leather sofa repair manufacturer for professional operations, so as to avoid the improper operation, the damaged area will be enlarged and repair will not be possible.
Fourth point: try to avoid touching sharp objects in daily use
Leather sofas are different from sofas made of other materials. During daily use, you must avoid direct sunlight and high temperature baking and contact with chemicals. In addition, you must avoid sharp objects scratching the sofa surface.
Although the leather sofa can improve the quality of the home, it must be carefully used in daily use, and regular maintenance and maintenance must be performed to avoid damage to the leather sofa due to improper use. In addition, if there are some pets in the home, or families with children do not recommend the placement of leather sofas, traditional fabric sofas and wooden sofas can be used to reduce the cost of the sofa.
With the improvement of the technology level of machine tool manufacturing industry, CNC machine tools have been put into various parts processing and automated production lines, which will be an indispensable connection device for major smart factories in the future.
There are two major types of CNC machine tools: metal cutting equipment and sheet metal equipment. According to their control principles, functions, and components, they are classified from different perspectives, and are mainly divided into the following categories:
First, in the processing of parts of the hole system, point-controlled CNC machine tools.
The point control NC machine tools mainly include NC drilling machines, NC boring machines, NC punches, and coordinate measuring machines. The printed circuit board drilling machine is the simplest point control NC machine tool. The point-controlled NC machine tool is used to process the hole system in the plane. By controlling the two coordinate axes in the machining plane, the tool and the workpiece are moved relative to each other. The machining method is to quickly move from one coordinate position to the next coordinate position, and then control the third coordinate axis for cutting.
This type of machine tool requires high positioning accuracy of the coordinate position. In order to improve production efficiency, the machine tool uses the set maximum feed speed for positioning movement, and advances or grades continuously near the positioning point in order to approach the end point at low speed, thereby reducing Inertial overshoot of moving parts and the resulting positioning errors. During the positioning and moving process, the CNC machine tool does not cut and does not have any requirements on the motion trajectory.
Second, in cutting processing, the most widely used linear control CNC machine tools.
The linear control CNC machine tool can control the appropriate feed speed of the tool or table, and perform linear movement and cutting in a direction parallel to the coordinate axis. The feed speed can be adjusted within a certain range according to the cutting conditions. Linear control CNC lathes with only two coordinate axes are used for machining step axes. Three-axis linear control CNC milling machine can be used for plane milling. Modern combined machine tools use a numerically controlled feed servo system. The drive power head carries multiple axis boxes to feed in the axial direction for cutting. It can also be regarded as a linearly controlled numerically controlled machine tool.
Third, CNC machine tools for complex parts with curve and contour control.
Contour CNC machine tools are divided into planar contour machining NC machine tools and spatial CNC machine tools. The CNC machine tools for plane contour processing include CNC lathes for turning curved parts and CNC milling machines for milling curved contours. They are distinguished according to the contour shapes of the processed parts. No matter what kind of line segment the component contour is composed of, usually a small straight line is used to approximate the contour of the curve during processing.
Using the calculated two displacement components to instruct the two coordinate axes to move simultaneously, this control method is called two-coordinate linkage control. When turning curved parts with a circular cutting edge turning tool with radius R, interpolation calculation and tool radius compensation calculation are also performed. When machining with a cutting edge turning tool with radius R=0, direct calculation can be performed according to the contour of the workpiece, and the problem of tool center offset does not need to be considered. Therefore, the calculation of tool radius compensation is not necessary, only interpolation calculation is performed. CNC machine tools capable of two-coordinate linkage control can also generally perform point and linear control.
There are several processing methods according to the shape of the processed parts:
① On a machine tool with three-coordinate control and two-coordinate linkage, use the "line cutting method" for processing. This method is also called two-axis semi-control, that is, any two of the X, Y, and Z axes perform interpolation motion, the third axis performs periodic feed motion, and the tool uses a ball-end milling cutter.
②Three coordinate linkage processing. The track bus SS'of the ball-return device of the inner-circulating ball nut is a spatial curve, which can be approximated by a spatial straight line, and can be processed on a three-coordinate linkage bed with a linear linear interpolation function. However, the programming calculation is more complicated, and the processing program can be prepared by an automatic programming system.
③ Four coordinate linkage processing. The processed surface of the aircraft beam is a straight twisted surface. If it is processed by a three-coordinate linkage machine tool and a ball-end milling cutter, not only the productivity is low, but the surface roughness of the part is also very poor. The peripheral milling method of cylindrical milling cutter is used to process on a four-coordinate machine. In addition to the linkage of three moving coordinates, in order to ensure that the tool and the workpiece profile are always fitted over the entire length, the tool should also perform a swing linkage around the spindle. This swing linkage results in an additional compensation movement for the linear movement coordinates. The additional movement amount is related to the position of the pendulum. It must also be calculated during programming.
④ Five-coordinate linkage processing. Almost all space contours can be machined with a ball-end milling cutter in the "line-cutting" method. For some large curved contours, the size of the part and the radius of curvature of the curved surface are relatively large. Switching to a face milling cutter can improve productivity and reduce the residual amount of processing.
During machining, the coordinates of the cutting point and the direction angle θ of the normal line are constantly changing, so the coordinates of the tool position point and the direction angle of the tool axis must be changed accordingly. The current CNC machine tools calculate the coordinates and orientation angles (that is, tool position data) of the tool position points corresponding to each cutting point according to the mathematical model of the contour of the part surface when programming the machining program, and input them to the CNC system through the program.
The coordinate position of the tool position point is realized by three linear feed coordinate axes, and the directional angle of the tool axis can be synthesized by any two rotation angles of rotation around the coordinate axis. Therefore, when machining a surface curved surface with a face milling cutter, it is necessary to control five coordinate axes (three linear coordinate axes and two circumferential feed coordinate axes) for linkage. The five-axis linkage CNC machine tool is the most complete and most complex type of CNC machine tool. The programming of five-axis linkage machining is also the most complicated. It should be prepared by using an automatic programming system.
The above classification is mainly based on the machining functions of CNC machine tools. If classified from the perspective of the number of control axes and the number of linkage axes, CNC machine tools can be divided into two-axis linkage CNC machine tools, three-axis control two-axis linkage CNC machine tools, four-axis linkage CNC bed and five-axis linkage CNC machine tools.
In the 1930s, with the emergence of professional associations, professional competitions, and a large number of professional experts, darts became more specialized. Today, darts has become a very popular sport in Britain, France and the United States. There are many ways to play darts, and different rules are different, but the basic rules are the same.
Equipment darts
1. Athletes participating in the competition must bring their own darts.
2. The length of darts must not exceed 30 cm, and the weight of hard darts must not exceed 40 grams.
3. The dart must be equipped with a dart body, a dart shaft, a dart tip, and a dart wing.
Dart board
1. Set the score area: This area is the score area where the outer circle of the dartboard is calibrated.
2. Set the double zone: the narrow circle of the outer circle of the dart board is twice the zone of each score.
3. Set the triple zone: The narrow circle of the inner circle of the dart board is three times the score of each score zone.
4. Set the outer circle center: This area is set to 25 points (green).
5. Set the inner circle center: This area is set to 50 points, and this area is the double area (red) of the outer circle center.
6. Specifications and sizes on the shooting range target:
Dart board diameter: 453.0 (± 3.0) mm
Digital ring diameter: 436 mm, wire diameter 2mm
Separation ring diameter: 335mm, wire diameter 1mm
Dart board thickness: 38mm
Outer diameter: 31.8mm
Inner center diameter: 12.7mm
Double zone top arc width: 55 mm
Double zone, triple zone width: 8mm
Bottom arc width: 50mm
Three times the top arc width: 35mm
Bottom arc width: 30mm
The highest height of the upper section: 55mm
Lower partition height: 80mm
The arc at the bottom of the straightened area is: 5mm
The basic principle
Each round includes three darts.
1. Darts that have collapsed or fallen off the dart board must not be scored or recast. The 5-second rule of the tournament requires that after the third dart is thrown, any dart must stay on the dartboard for not less than 5 seconds before the score can be scored.
2. Basically, darts is a match between two players or two teams. The group can consist of two or more members. Team members from both sides take turns to throw.
3. Each player can throw nine darts before the start of the game, usually to warm up the athletes personally. After that, it is decided that everyone who is near the target center will start to throw darts.
4. Each player throws a round of darts when it is his turn, and then the player retrieves his own darts. If a player accidentally releases his dart by crossing his throw line or tripping accidentally, he will not be scored and may not re-throw.
5. The competitor can approach the dart board at any time to confirm the position of the dart, but be sure that no one can touch and touch the dart until the round is completed.
Type of darts game
301 and 501 are the favorite darts rules in the world, and have become the most standard tournaments in the world.
301
Ancillary rules: You can choose single / double bullseye, normal / double-in, normal / double- / triple-out.
A round is divided into ten rounds, and each player starts with 301 points. The player's points decrease as the darts are thrown. First, whoever first reduces the points to 0 wins. If after ten rounds of throwing, no player reduces the points to 0 , The player with the lowest points wins.
501
Ancillary rules: You can choose single / double bullseye, normal / double-in, normal / double- / triple-out.
Twenty rounds in a round, each player starts with 501 points, and the player's points decrease with the throwing score. The player who first reduces the points to 0 wins.
AOI stands for aoi automated optical inspect equipment. It is a device for detecting common defects encountered in production based on optical principles. It is a relatively standardized branch of visual inspection. The AOI system extracts information from objective images, processes it for understanding, and finally uses it for actual detection, measurement, and recognition. So far, AOI automatic optical inspection has mature applications in PCB, FPD, semiconductor and other industries.
AOI automated optical inspect machine has become an important inspection tool and process quality control tool for electronic manufacturing to ensure product quality, which greatly improves production efficiency and production automation. In the field of PCB manufacturing, electronic components tend to be miniaturized, and the degree of integration is getting higher and higher, and manual detection methods are no longer capable. AOI automatic optical inspection enables PCB manufacturers to greatly improve the yield rate, and has become an indispensable part of the PCB intelligent manufacturing industry.
In the smart phone industry, the "double-sided glass cover + metal middle frame" technology route will further establish itself as the industry's leading position. With the steady growth of global smartphone shipments, the demand for glass covers has been further released. Various cover glass processing manufacturers in the mobile phone industry are actively expanding 2.5D glass production capacity and laying out 3D glass production lines.
Glass processing is a complicated project. Often, there are three quality inspections in the production process of a piece of cover glass. At present, most production lines in the world still use manual inspection. This is not only inefficient, but also cannot guarantee the consistency and accuracy of human eye detection. The introduction of AOI product optical inspection machine is of great significance to improve the yield of cover glass and increase the production line capacity.
Yingshang Intelligent Co., Ltd. has a number of independently developed optical patented technologies, patented mechatronics technologies, image processing and machine learning core technologies. At present, the company has successfully developed a variety of AOI optical automatic detection equipment for glass cover detection systems, which are compatible with the detection of white glass, silk screen glass and OGS glass.
CNC machining center is widely used in machined the components with complex shape, high precision and Multi-process machining such as:
1. Case Accessories (Enclosure Machining)
The case accessories normally has many Cavities inside and they are wildly used in Automobile industry and aviation industry. Such as automobile engine cylinder, Gearbox, Machine tool main Axle Box, Diesel engine cylinder, Gear pump Shell, etc. CNC machining center can complete 60-95% processing of general machine. With its characteristics of high processing efficiency and automatic tool changing, as long as we draw up the control plan, produce the craft process, proper use of special fixtures and cutters, it easy to produce case accessories.
2.Parts With Complex Curved Surface
Parts with complex surfaces are widely used in aviation, aerospace and transportation fields.Such as the cam, integral impeller of aero-engine, propeller, die cavity, etc. It is difficult to achieve the predetermined precision and difficult to detect just by using the common machine tool or precision casting when machining these parts with complex surface contour. However, these complex parts can be processed using a multi-axis linkage machining center, combined with automatic programming techniques and special cutting tools.
3.Irregular Shape Parts
Irregular shape parts most need point, line, surface multi-station mixed machining.(such as supports, bases).CNC machining center Show its superiority to machining those complex parts.
4. Plate And Coat Parts
These parts in general has keyway and radial hole, End-face distributed with holes or
curved surface. Such as axle sleeve with flange, motor covers .vertical machining centre is a good choice.
5. Prototype-sample For New Products
CNC machining centers process a wide range of adaptability and flexibility. Input new programming to realize machining. Sometime process by modifying program segment or special instruction. Use the scale function command to process parts of the same shape and different sizes. It provides a lot of convenience for single piece, small batch and multi-variety production and Shortened production cycle.
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