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There are seven major processes including fixing, centering, heating and welding.

Step 1: prepare

Prepare the socket fusion welder, including the hydraulic station, milling cutter, heating plate and other related power supplies, and place the butt frame stably;

Step 2: Place

Place the two pieces of pe pipe to be welded in the docking frame, and the connection is handled in the middle of the four clamps of the docking frame.

Step 3: Fix

Close the upper and lower brackets of the docking frame and fix the pe pipe with bolts.

Step 4: Milling

Take the milling cutter out of the basket, place it in the middle of the two PE pipes, push the joystick of the hydraulic station, and touch the two PE pipes with the milling cutter until the two connecting planes are milled, and long strips of debris are milled out.

Step 5: Alignment

Because the fixed pipe may be offset during the milling process, it is necessary to re-center and adjust the misalignment. Of course, care must be taken not to contaminate the port, otherwise it is necessary to mill again.

Step 6: Heat

Put the milling cutter back into the basket, and take the heating plate out of the basket and put it in the middle of the two PE pipes for heating. After the two pipes are flanged and meet the requirements, put them back on the heating plate.

Step 7: Soldering

Generally speaking, the 450mm hot melt hydraulic butt welding machine uses a hot melt machine to weld pipes, with fast speed and low cost, and is suitable for pe water supply pipes and pe gas pipes. The electrofusion welding of 450mm hot melt hydraulic butt welding machine, that is, the hot melt connection of polyethylene piping system, includes hot melt butt and hot melt socket connection.

The hot-melt socket connection is suitable for pipes and fittings with relatively small diameters, because the pipes and fittings with small diameters have thin walls and small cross-sections, and the quality of the butt joint is not easy. Hot-melt butt is suitable for pipes and fittings with relatively large diameters. It is less material than socket connections and is easier to manufacture. Because the oxidized surface layer is cut off before welding, the welding pressure can be controlled and the quality is easier. From the perspective of development trends, the use of hot-melt butt joints is the mainstream.

The test proves that pipes and fittings made of different grades of polyethylene pipe special materials can be connected by hot melt. However, because the polyethylene pipes and fittings produced in China are often not made of special materials that fully meet the standards, it is recommended to pass tests and inspections when hot-melt connections of polyethylene pipes and fittings of different brands and batch numbers are required.

The process and equipment of the hot melt connection of the polyethylene piping system are relatively simple, but in order to further ensure the quality, it is still necessary to use ultrasonic testing for the quality of the hot melt connection, but the on-site use has not been popularized.

　　Description of welding principle of 200mm hydraulic hdpe welding machine:

　　1.The plate drawing structure is adopted, and the heat of the heating plate is transferred to the welding surface of the upper and lower plastic heating parts by the electric heating method. Melt the surface, and then quickly withdraw the heating plate. After heating the upper and lower heating elements, the melting surface is fused, solidified and integrated. The whole machine is in the form of a frame, which is composed of three large plates: upper template, lower template and hot template, and is equipped with hot mold and upper and lower plastic cold mold. The action mode is pneumatic control.

　　2.Use the electrothermal melting principle to control the temperature change and cooperate with the mechanical device to achieve the effect of product welding, embedding nuts and riveting! Copper nails, screw embedding, plastic riveting. It is suitable for large and medium-sized workpieces, such as hot embedding, riveting, spot welding and other processes. It can meet the needs of screw embedding and riveting, such as computer face frame, keyboard, electronic appliances and other large area, multi-point plastic processing needs, and the inlaying, welding of metal mechanism parts and plastic mechanism parts, hot melting and embedding of screws, nuts and other hardware.

　　200mm hydraulic hdpe welding machine Welding advantages:

　　1.The clamp is fixed on the corresponding position of the upper and lower pressing plates;

　　2.Under the action of the power and positioning guidance system of the upper and lower pressing plates, the rubber parts can contact the hot stamping die for hot stamping at a high speed, stably and without impact, so that the material of the rubber part joint surface can reach the molten state;

　　3.Leave the hot stamping die smoothly and quickly in a short time;

　　4.The heating plate of the hot stamping die, the upper fixture and the lower fixture are designed as a vertical assembly part, which is convenient for installation and handling.

　　Application scope of 200mm hydraulic hdpe welding machine:

　　PART 01 Overview

　　Thank you for using Haijiao HWA series full-automatic butt welding machine. HWA series full-automatic 450mm hydraulic butt fusion machine series is used for full-automatic hot melt butt welding of PE pipes, pipe fittings, etc., to meet the requirements of information data acquisition and transmission, and is equipped with a variety of sophisticated functions. It is important to ensure the safety of operators and welding quality.

　　HWA series full-automatic hot melt butt welding machines use heating plates to heat the end faces of polyethylene pipes (and pipe fittings) to make them reach the specified temperature and melt, and then automatically remove the heating plates to quickly fit the pipes and cool them under a certain pressure, so as to form qualified welds with uniform crimping and complete the welding.

　　PART 02 Preparations before operation

　　1.Familiar with welding machine

　　Before connecting the power supply of the welding machine, the welding operator shall be familiar with and master all aspects of the welding machine, and read and understand the operation instructions of the welding machine. Before starting the welding work, the welding operator shall check and ensure that the generator has enough power and enough fuel. Warm reminder: The generator is recommended to be used together with a voltage regulator. Check and confirm whether the power supply voltage meets the requirements and whether the power supply cable meets the requirements.

　　2.Fixture

　　Fixture is supplied with 450mm hydraulic butt fusion machine. Clamps are used to clamp pipes smaller than the diameter of normal welding machine. For example, HWA-250 may provide 200 clamps at random to clamp 200 caliber pipes; Clamps can also be assembled, and 160 caliber pipes can be stacked together to form 160 clamps.

　　Each set of fixture is equipped with suitable bolts for fixing the fixture to the frame. The hexagon socket special wrench provided with the machine is used to tighten these bolts. Please pay attention to selecting the bolts with appropriate length.

　　3.Input parameters

　　Many people who are new to PE construction often ask questions about the operation of electrofusion welding machine.Although there are very detailed instructions in the instruction manual, there are still many users who cannot master it. The connection interface of electrofusion welding machine for hot-melt butt joint is flat. The method is to heat two identical connection interfaces to a viscous flow state with a hot plate, remove the hot plate, and then apply a certain pressure to the connection interface, and in this pressure state Cool down and solidify to form a strong connection.

　　Before heating the pair, it is necessary to mill the two ports of the pipeline to be welded, so as to make the welding surface smoother, and to remove the plastic oxide layer on the surface of the port to make the same molecule melt more thoroughly. The main processes of the whole welding process are adjustment, heating, switching, joint pressurization and cooling.

　　The material in the viscous flow state on the interface during butt joints flows and diffuses. Too much flow is not conducive to diffusion and entanglement. Therefore, the flow should be limited to a certain range to achieve "post-melt welding" in a limited flow. Therefore, the key to the docking process is to adjust the three parameters of temperature, time and pressure during the docking process, and to consider factors such as the performance, stress state, geometry and environmental conditions of the connection interface material, in order to achieve reliable fusion welding.

　　According to the general rules and the characteristics of the respective materials used, the test should be carried out to evaluate the welding quality. After reaching the system standard, the process specification of each variety and specification should be determined.

　　When purchasing products, we need to consider purchasing them comprehensively. Today, I will show you how to purchase a qualified Automatic button welding machine. Here are ten points to share with you.

　　1. Understand the company's strength, whether it is independent R&D and production, whether it has technical strength guarantee, and provide guarantee for future equipment maintenance, equipment detection and calibration, system upgrade, and whether it can buy equipment accessories, so as to solve users' worries.

　　2. Understand whether there is after-sales service and relevant service measures, whether there is a nearby service network or whether there is a quick solution for a nearby service network, and relevant emergency measures.

　　3. Whether the basic three elements "pressure, time and temperature" of a qualified Automatic BUTT Welding Machine are accurate, whether the displayed value matches the actual output value and whether it meets the requirements of national standards. (The total welding pressure is equal to the drag pressure plus the theoretical welding pressure; the crimping time, heat absorption time, switching time, gradual rise time and cooling time should meet the requirements; the surface temperature difference of the heating plate should be less than or equal to plus or minus 3 degrees.) As manufacturers have relevant instruments to detect pressure and temperature, if you go to the manufacturer to purchase equipment, you can propose to let the equipment manufacturer demonstrate how these three elements are detected and calibrated on site.

　　4. Pay attention to whether the action of the oil cylinder is slow in the rising butt joint stage after the heating plate is extracted, which is also an important stage to ensure a qualified weld crater. If it is too fast, it will cause impact on the weld crater and form a false weld.

　　5. Whether the cross section identification of the oil cylinder of the equipment is marked on the machine body or found in the instruction manual is an important parameter for calculating whether the welding pressure is consistent with the national standard, and it is also an important parameter for checking whether a qualified manufacturer really understands the authenticity of the welding process.

　　6. The number of replaceable slips of Automatic butt welding machine is mostly 3 layers, which is also required by the national standard. If the combination of multi-layer slips is used, the welding quality cannot be guaranteed. The more layers of slips, the greater the cumulative error and the greater the pressure loss on the weld junction.

　　7. Whether the Automatic button welding machine has the functions of temperature compensation, online real-time monitoring of output pressure, and alarm prompt in case of discrepancy between actual output and parameters.

　　8. The appearance of a qualified crater shall have a smooth and symmetrical welding ring along the entire outer circumference of the pipe, and the welding ring shall have a certain degree of symmetry and alignment. The ring size of gas pipeline shall be controlled according to the following geometric dimensions to ensure the quality of welded junction.

　　Width of ring=(0.35-0.45) * wall thickness

　　Height of ring=(0.2-0.25) * wall thickness

　　Height of circumferential seam=(0.1-0.2) * wall thickness

　　9. In terms of equipment price, there are 30000 to more than 100000. There are imported products with original packaging, as well as joint venture assembled products in the market. Several domestic full-automatic products have been made. The product prices vary greatly. When choosing a welding machine at what price, the output accuracy of the equipment itself should be put in the first place. If the parameters are inaccurate, it will lose the significance of using a fully automatic welding machine. Then compare the difference between materials and hydraulic valves, sensors and control systems. For example, the price of a pressure sensor ranges from hundreds to thousands. The selection of materials and standard parts directly affects the stability, output accuracy and service life of the system.

　　Let's take a look at the first question of the plastic welding machine. The power supply is disconnected. Why is it disconnected? That is, the fuse is burnt or the power interface is damaged. How can we solve this problem? We need to replace the parts or reconnect the power.

　　The second problem is that the display screen does not display, the screen is blurred, and the machine buzzes after power on. It may be that the display screen is damaged. The causes of the display screen damage are damp, heat, impact, aging, and the wiring falls off. If this problem occurs, we can reconnect and replace the display screen.

　　The third plastic welding machine is that the current cannot rise because the external power supply is undervoltage and the power line is too long. It is necessary to check the external power connection and re lay it.

　　The fourth reason is that the current parameters of the front section are too low when the power supply is turned on. The method is to increase the current parameters of the front section for less than 30s, and then continue welding with normal parameters

　　The fifth is to show that the welding is abnormal because the heating element of PE pipe fittings is short circuited. We can stop welding and wait until it cools down before welding

　　The sixth is to show that the output is open circuit, the resistance value exceeds the lower limit, and the PE pipe fittings are abnormal. Check the PE pipe fittings and replace them for welding

　　The seventh is that the welding process is abnormal, the connecting column is hot, the copper cap of the output line is aging, and the copper cap is corrected or replaced with new parts.

　　The eighth is to show that the cause of over-current and over-voltage is the problem of external power supply, which needs to be checked and reconnected.

　　In the actual operation of PE pipe welding equipment, many aspects need to be paid attention to. The following sections explain the use of manual hdpe pipe welding machine to avoid problems in the operation process.

　　As the parameters of electric fuse accessories produced by various manufacturers are different, welding machines should be used when purchasing electric welding machines. Or in the process of use, the selection range of pipe fittings will be reduced or only manual operation will be used, which reduces efficiency, wastes personnel and equipment, and affects the project quality.

　　Does the voltage fluctuation of the welding machine affect the welding joint during operation? For a given electric fuse, the resistance of the internal preheating resistance wire is positive. At this time, the heating power of the resistance wire is only related to the welding voltage provided by the welding power source. When the voltage fluctuates, the heating power changes due to the fluctuation of heating power, and the quality of the welding interface becomes worse.

　　However, the electric welding machine has good voltage regulation ability, and can keep the voltage provided by the electric welding machine within the allowable range in case of grid voltage fluctuation, so as not to affect the joint quality.

　　manual hdpe pipe welding machine

　　Will the length of time affect the welding quality? During the heat transfer time, the energy consumed by each specification of pipe fittings shall be the same. If the heating power is constant, the required energy is only related to time. Theory and practice have proved that the welding time of pipe fittings with specific specifications must be controlled within a reasonable range, which is related to the thermal properties of materials.

　　Only in this way can the matching heating power, that is, the power output voltage, be selected. Otherwise, the heat transfer conditions of the melting interface will change due to the different heating time, thus affecting the welding quality. Therefore, it is necessary to accurately control the heating time.

　　Does the change of ambient temperature affect the quality of welding? The change of ambient temperature during welding directly affects the heat transfer conditions in the welding zone and affects the welding quality. Therefore, the power supply can monitor the ambient temperature and adjust the output parameters according to the deviation results.

　　manual hdpe pipe welding machine

　　Process steps of hdpe pipe welding machine:

　　Material preparation: pipes and pipe fittings shall be matched with equal diameter, reducing elbow, tee and other pipe fittings according to construction requirements. Pipe fittings of the same brand and material should be used for hdpe pipe welding machine, and the welding between pipe fittings of different brand and material with similar performance should be tested first.

　　Clamping pipes: clean the dirt at the ends of two pipes with a clean cloth. Place the pipe in the rack slip, replace the basic fixture according to the welded pipe fittings, select the appropriate slip, make the length of the extended ends of the butt joint approximately equal, and shorten it as much as possible under the condition that the requirements for milling and heating are met. The part of the pipe outside the hdpe pipe welding machine frame shall be supported by a support frame, so that the pipe axis and the center line of the frame are at the same height, and then fastened with slips.

　　Cutting: Put in the milling cutter, then slowly close the welding ends of the two pipes, and apply appropriate pressure until there are continuous chips on both sides. Remove the pressure, wait for a moment, and then exit the movable rack. The chip thickness shall be 0.5~1.0mm to ensure that the impurities and oxide layer on the end face of the welded pipe section are cut and that the two butt joint end faces are flat and smooth.

　　Alignment: The misalignment of two pairs of welded pipe sections should be as small as possible. If the misalignment is large, it will lead to stress concentration, and the misalignment should not exceed 10% of the wall thickness.

　　Heating: after the temperature of the heating plate reaches the set value, it is put into the rack and applied with pressure until the pressure decreases to the specified value when the curling on both sides reaches the specified width, and then heat absorption is carried out. Ensure that there is enough molten material for molecular diffusion during melting and docking.

　　Switching: the period from the end of heating to the beginning of melting butt joint is the switching cycle. To ensure the quality of melting butt joint, the shorter the switching cycle, the better.

　　Fusion butt joint: it is the key of welding, and the fusion butt joint process should always be carried out under the melting pressure.

　　Let ’s tell you how to buy a qualified 200mm Hot Melt Hydraulic Butt Welding Machine

　　1.Understand the company's strength, whether it is independent research and development and production, whether there is technical strength guarantee, to provide guarantee for future equipment maintenance, equipment testing, calibration, system upgrade, and accessories that can buy equipment to solve the worries of users.

　　2.Understand whether there are after -sales services and related service measures, there are no service outlets or fast solutions that have no service outlets or near -service outlets, as well as related emergency measures.

　　3.Whether a qualified equipment basic three elements "pressure, time, temperature" are accurate, and the display value must be matched with the actual output value to meet the national standard requirements. (The total pressure of welding is equal to the welding pressure of drag pressure and theoretical welding; the rolling time, the heat absorption time, the switching time, the gradual increase and the cooling time must meet the requirements; There are related test pressures and temperature instruments. If you go to the manufacturer to buy equipment, you can propose how the three elements of the equipment manufacturer demonstrate the three elements of these three elements are detected and calibrated.

　　4.Pay attention to whether the movement of the tank of the tank after the heating board is slow to extract the motion of the tank is slow. This is also an important stage to ensure a qualified welding port.

　　5.Whether the sectional area of the equipment of the equipment is indicated on the fuselage or found in the instruction manual. This is an important parameter to calculate whether the welding pressure is consistent with the national standard. Essence

　　6.The replaceable Caval number of fully automatic welding machines is 3 layers. This is also the national standard requirements. If it is a multi -layer Cava combination, the quality of welding cannot be guaranteed. The more cumulative errors caused by the number of layers of Cava, the greater the loss of the pressure on the welding port.

　　7.Whether the welding machine has temperature compensation, monitor the output pressure online in real time, and the alarm prompts such as the actual output and the parameter are inconsistent.

　　8.The appearance of a qualified welding port must have a smooth and symmetrical welding ring along the pipeline. The welding ring should have certain symmetry and positiveness. The gas pipeline controls the size of the ring according to the following geometric size, which can ensure the quality of the welding port.

　　The width of the ring = (0.35-0.45)*wall thickness

　　The height of the ring = (0.2-0.25)*wall thickness

　　The height of the ring seam = (0.1-0.2)*wall thickness

　　9.200mm Hot Melt Hydraulic Butt Welding Machine price, now there are 30,000 to more than 100,000. There are original imported from the market, and there are also joint venture assembly products. There are also several domestic automatic products that have been made. The price of product is very different. When choosing the price of the welding machine, the equipment itself should be placed in the first place. If the parameters are not accurate, the meaning of using a fully automatic welding machine is lost. Then compare the difference between the materials and the hydraulic valve, sensor, and control system. For example: the price of a pressure sensor ranges from hundreds to thousands. The selection of materials and standard parts directly affects the stability of the system, the accuracy of the output, and the service life of the system.