The installation of PVC pipes is not only simple and convenient, but also very time-saving. The installation of PVC pipes is mainly fixed by glue, apply glue on the place where installation is needed, and then fix it. But don't look at its simple installation and ignore it. In many cases, we do not pay attention to details and cause some defects in the installation process. So how should pvc pipe be installed? The following briefly introduces its installation method.
1. The first is to cut. The sizes of PVC pipes are all different, divided into large-diameter pipes and small-diameter pipes. Pipes with small diameters are easy to cut, and can be cut with only the scissors for cutting pipes. However, large-diameter pipes cannot be cut with scissors. We need to use a cutting machine to cut, and we must pay attention to cutting vertically when cutting, so that we can save it when a mistake occurs.
2. Since the PVC pipe is made of plastic, it is easy to have some burrs on the cutting surface after cutting. The presence of these burrs will affect the subsequent installation, so after cutting, these burrs should be cleaned and polished to be smooth.
3. Pay attention to the surface of the pvc pipe, keep the surface of the pipe clean and tidy, and avoid impurities such as dust. If the surface of the pipe is not clean, after applying the glue, it is easy to affect the stability of the glue, which is likely to be unable to fix the pipe.
4. Mark the marking line and note the position of the marking line.
5. When choosing glue, be sure to choose the right glue. And when applying it, it must be applied in accordance with the regulations. The amount of application must be controlled, not too much or too little, and the right amount is the most appropriate. If you do not follow the regulations, it is easy to cause some serious consequences.
6. Finally, it is fixed. After fixing with glue, place it in a ventilated place to dry, and finish fixing when the glue dries.
Advantages of CNC machining and precautions
Numerical control machining (CNC) is an advanced machining technology in today's machinery manufacturing. It is an automatic machining method with high efficiency, high precision and high flexibility.It is to process the workpiece numerical control program input to the machine tool, the machine tool under the control of these data automatically processing in accordance with people's wishes to produce wonderful products.
Numerical control processing technology can effectively solve such complex, precise, small batch of changeful processing problems as mold, fully adapt to the needs of modern production.Developing nc machining technology has become an important way to accelerate the development of economy and improve the ability of independent innovation in China.At present, the use of CNC machine tools in our country is more and more common, can master CNC machine programming, is the important way to give full play to its functions.
Advantages of CNC lathes
The following are some advantages of CNC lathes for your reference:
1, if the CNC lathe is correctly programmed, it can usually produce 100% of the products accurately.They produce parts to a great extent to improve accuracy.Provides good positioning accuracy and repeatability.Because of their accuracy and ability to reuse programs, they can provide higher quality.
2, applicable to numerical control lathe numerical control lathe processing parts processing as a very suitable for a variety of medium and small batch parts of CNC lathe processing and manufacturing cost is falling, now at home and abroad a large number of processing spare processing small batch and single production will also appear when parts, if you can shorten the time of debugging and ready to die, also can choose
3, once you learn the CNC lathe, it will not be difficult to use.For example: Because fewer clamps are used, there is no need to use complex clamps and fixtures in all areas, thus reducing the actual storage requirements.As no complex fixtures and fixtures are required, the die cost is reduced.After passing the inspection, the inspection of subsequent parts is reduced.Advanced machine control and programming capabilities make complex machining operations easier.
4. Modern CNC lathe design software allows designers to simulate their own ideas.There is no need to make prototypes or models.It saves time and money.
5, the use of CNC lathe can effectively reduce the time needed to produce furniture.CNC lathes enable the operator to make changes or improvements with little delay or expense.Reduce waste as errors due to operator fatigue, interruptions and other factors are less likely to occur.Improve production plans, because they can usually perform work under a setup that typically requires multiple regular machines.Due to the reduction of mold cost, the delivery time is shortened.
6, in addition to the occasional maintenance time, CNC lathes can be used 24 hours a day, 365 days a day continuous use.
Seven small parts, CNC lathe processing and surface roughness value of allowance on the workpiece material and Angle of the cutting tool allows cases, the surface roughness depends on the cutting speed, feed speed and ordinary lathe is constant rotational speed, diameter of different cutting speed is different, such as which has the function of constant cutting CNC lathe processing, and in the face of different diameter cylinder can use the same linear velocity, ensure that the surface roughness value is small and the surface roughness in different surface finish, small surface roughness and consistent when using small feed speed, surface roughness, use the feed speed is big, change is very good,It's hard to do that on a regular lathe.
8, through the use of "virtual software", you can carry out the use of CNC training.The software allows the operator to practice using a CNC lathe on a computer screen.The software is similar to a computer game, which can make the learning process fun and easy to learn.
Precautions before starting CNC lathe machining:
Before the start of CNC machining, it is necessary to be familiar with the performance, structure, transmission principle, operation sequence and emergency stop method of CNC machine tools.
(2) Check the amount of oil in lubricating oil and gear box.
(3) Check the fastening screw and do not loosen it.
(4) Clean the surrounding environment of the machine tool. The machine tool and the control part should always be kept clean. Do not remove the cover and start the machine tool.
(5) Calibrate the tool and meet the use requirements.
Matters needing attention after the CNC lathe is started:
After the machine starts, before the automatic continuous operation of the machine, it is necessary to monitor its running status.
(2) Confirm that the coolant output is smooth and the flow is sufficient.
(3) When the machine is running, the protective cover shall be closed, the cutter shall not be adjusted and the size of the measuring workpiece shall not be measured, and the hand shall not be close to the rotating cutter and workpiece
(4) Remove the cuttings on the workpiece or tool when the machine is stopped.
Matters needing attention when finishing nc machining:
(1) Cleaning machine.
(2) Anti-rust oil lubrication machine tools.
(3) Turn off the system and power.
More and more people turn to online shopping this year because of the COVID-19, from small-size items, such as daily grocery, sports tools, to big-size items, such as light products or even furniture. When it comes to light products, most people tend to know whether it’s safety compliant, UL, ETL, or CSA listed, but always ignore FCC certification. So, can I buy a light product without FCC certification from an online store? The answer is yes, and no.
Then, what’s FCC certification? You may already know that FCC is Federal Communications Commission. The FCC office of engineering and technology laboratory division has rules for lighting products to ensure these devices do not cause harmful interference to radio communications services. It’s mandatory for most lighting products. Most lighting products generate not only light but also radiofrequency. For example, LED lights need to transfer high-voltage sinewave alternative current to low-voltage stable direct current to turn on the transistors in LED chips. This electric transformation and distortion will inevitably generate radiofrequency.
Suppose it’s a traditional light fixture, such as an 18-light chandelier with medium screw bases. In that case, FCC certification is not required because the voltage on each lamp socket is the same as line voltage, with no transformation or distortion. But for the bulbs mounted on the traditional light fixture, FCC certification is mandatory, no matter they are incandescent, halogen, CFL, or LED.
LED light must be FCC listed if it is connected directly to line voltage. Some LED lights to adopt FCC certified LED driver, which is good, but not enough if the LED driver is not a detachable part, the whole LED light must be listed as a whole. Take the LED vanity light as an example, the LED driver is mounted inside the backplate with 3M glue and not allowed to unmount by the customer, and then the LED vanity light must be FCC certified.
The LED light doesn't need FCC certification if connected to a low-voltage direct current power source, such as a 12V or 24V LED driver. Take the LED strip light as an example. Its electronic components are pure direct current within the LED strip lights; there is voltage dropdown from the LED driver's outlet, but no transformation or distortion. For sure, the 12V or 24V LED driver must be FCC listed.
For lighting products, UL, ETL, or CSA certification is not mandatory, but products with this certification are much safer than those without. We’d better choose products with UL, ETL, or CSA certification, or at least choose products made of UL, ETL, or CSA listed components.
Introduction and application of rfid electronic tag in tire tags! In recent years, some foreign countries such as the European Union, the United States, Japan, South Korea and other countries have successively introduced tire labeling laws, requiring tires to be labeled to indicate the level of fuel efficiency, rolling resistance, rolling noise, and grip on wet roads. So what exactly is a forum tag? What is the role of rfid electronic tag applied to tires, let me explain to you next.
First, what is a tire label?
Tire tag is also a kind of rfid electronic tag, it is used to record data, and it is used in conjunction with rfid reader. Generally it is passive.
Why do I need to get electronic tags on tires?
Rigid requirements: As mentioned above, many foreign countries have issued legal provisions on the rfid electronic tag of tires. The provisions stipulate that the tires must be affixed with electronic tags, so that the tires can be viewed through some attribute information during the production process. Whether it meets national standards is mainly based on: tire fuel efficiency, rolling friction, noise during rolling, and tire grip properties when the road is not dry.
Second, what is the role of rfid electronic tag applied to tires?
At present, the tire traceability marks on the market generally use the form of "bar code + sidewall information" to store various types of tire information, but the bar code and sidewall position information are located on the surface of the carcass, and the tire will soon be worn away after use . Once these information cannot be seen visually, it means that the tire information is lost, so that information such as tire model, pattern, and diameter cannot be identified. If tires are illegal and unsafe to use (unqualified tires, overloaded use, expired use, etc.), it will directly cause difficulties for the user's use, maintenance, and settlement of claims, leading to disputes and even frequent safety accidents. Waste of energy resources and damage to the environment.
The application of RFID technology can regulate the orderly production and sales of the tire industry (prevent counterfeiting, OEM, and cross-country goods), and realize the full life cycle management of tires; regulate the transportation industry to ensure personal and property safety; promote and standardize the tire retreading industry to achieve tires Circular Economy.
Demonstration of the application of RFID in tires: In the tire building process, the electronic tag is implanted inside the tire, which can withstand the deformation, high temperature and high pressure in the tire building and vulcanization process. The finished tire has undergone X-ray inspection, bubble inspection, dynamic balance and uniformity inspection, durability test inspection, etc., showing its reliable performance.
Implanting rfid electronic tags into the tires, from a safety perspective, mainly includes the combination of electronic tags and tire rubber, that is, the electronic tags must be integrated with the tires after being implanted into the tires, and no air bubbles and delamination will affect the quality of the tires; The weight of the electronic tag cannot affect the quality of tire dynamic balance, that is, the volume and weight of the electronic tag after packaging must meet the requirements of dynamic balance and uniformity of the tire; from the perspective of the reliability of the tag, the electronic tag implanted in the tire must bear The stretching, high temperature, high pressure, and flexural deformation during tire production and use are used throughout the tire's life cycle; from the perspective of reading and writing distance, the reading distance of the electronic tag implanted in the tire should meet the needs of later tire use management.
It can be seen that the combination of RFID technology and tire manufacturing technology can not only solve the problems encountered in the current tire identification and traceability processes, but also that the tires are embedded with rfid electronic tags, which can write tire production data, sales data, and use Data, retreading data, etc., and the corresponding data can be collected and read through the terminal at any time, and combined with the corresponding management software, the recording and traceability of the tire's full life cycle data can be realized. The above introduction and application of rfid electronic tag in tire tags are explained here. If each tire has an identification code when it leaves the factory, it has the same function as an ID card, so that it can be recycled when the tire is broken. .
Aluminum parts CNC machining to pay attention details（CNC prototyping）
As we all know, in CNC machining, whether manual programming or automatic programming, before the programming of the parts to be processed for process analysis, formulate the processing scheme, select the appropriate tool, determine the cutting dosage.
In programming, some process problems also need to be dealt with.
When aluminum casing CNC processes precision parts, it is necessary to program all the processed process, process parameters and displacement data, and record them in the form of digital information on the control medium (such as punched paper tape, disk, etc.), and use it to control the machine tool processing.
What details should be paid attention to in CNC machining of aluminum casing?
1. Before starting the machine, check whether the tool compensation, the zero point of the machine and the zero point of the workpiece are correct.
The relative position of each button should meet the operation requirements.
Careful preparation, input numerical control program.
2. When adjusting the machine tool, clamping workpiece and tool and sassafras swab machine tool, stop the machine.
If you find any abnormal situation or alarm signal, stop immediately and ask the relevant personnel to check.
3, to check the equipment on the protection, insurance, signal, position, mechanical transmission part, electrical, hydraulic digital display system operating condition, in all normal conditions can be carried out under the cutting.
4, must abide by the processing center safety operation procedures.
Should wear good protective equipment according to the regulation before the job, tie well cuff, prohibit to wear scarf, wear glove, tie, wear apron, female worker plait should be pulled inside the hat.
Tools or other items must not be placed on electrical appliances, operating cabinets and enclosures.
Do not remove iron filings directly by hand. Use special tools to clean them.
5. Before the CNC machining of aluminum alloy, the machine should be tested for lubrication, mechanical, electrical, hydraulic, digital display and other systems. The machining can be carried out under normal conditions.
After the machine tool enters the processing operation according to the program, the operator is not allowed to contact the workpiece, the cutter and the transmission part of the moving person, and is not allowed to pass or take the tools and other items through the transmission part of the machine tool.
Do not leave your position when the machine is turning. If you want to leave, put the work table in the middle and the knife stick back. You must stop and cut off the power supply of the main machine.