Take out the milling cutter
20 Aug 2018
(3) Take out the milling cutter, close the ends of the two tubes and check the alignment of the two ends. The displacement of the two ends of the pipe should not exceed 10% of the thickness of the pipe or the larger of 1mm. The pipe straightness and the tightness can be corrected to some extent. When the pipe is closed, there is no obvious gap between the two ends of the pipe. The maximum width cannot exceed: 0.3mm (DN< 225mm), 0.5mm (225mm<DN<400mm) or 1.0mm (DN>400mm). If the above requirements are not met, they should be milled again until the above requirements are met. (4) Measure the drag force (the frictional resistance of the moving fixture), this pressure should be superimposed on the process parameter pressure to get the actual use pressure. Also check if the heater plate temperature has reached the set value. (5) After the temperature of the heating plate reaches the set value, put it into the frame and apply the specified pressure until the minimum curl on both ...
welding Welding shall be carried out in accordance
13 Aug 2018
welding Welding shall be carried out in accordance with the parameters of the welding process card. When necessary, it should be appropriately adjusted according to changes in weather, ambient temperature, etc. The main steps are as follows. (1) Clean the dirt on both ends with a clean cloth. Place the tubing in the rack slips so that the length of the ends is equivalent (should be as short as possible, usually 25 to 30 mm, if the milling and heating requirements are met). If necessary, the outside of the pipe rack is lifted with the support so that the pipe axis is at the same height as the centerline of the frame and then fastened with the slips. See below. (2) Insert the milling cutter, first turn on the power switch of the milling cutter, then slowly close the welded ends of the two pipes, and apply appropriate pressure until there are continuous chips at both ends, remove the pressure, wait a moment, then exit the activity. Rack, turn off the power to the milling cutter. The chip ...
Use of hot melt butt welder
06 Aug 2018
Use of hot melt butt welder 1, welding preparation The preparation for welding is mainly to check whether the condition of the welding machine meets the working requirements. For example, check whether the fasteners in various parts of the machine are loose or loose; check whether the electrical connection of the whole machine is correct and reliable; check whether the hydraulic oil in the hydraulic tank is sufficient; confirm that the power supply matches the requirements of the machine; whether the heating plate meets the requirements (Whether the coating is damaged); trial operation of milling cutters and oil pump switches, etc. Then insert the slips with the same pipe specifications into the rack; set the temperature of the heating plate to the welding temperature (the welding temperature of the polyethylene pipe is 200~230 °C), and wipe the heating plate with soft paper or cloth alcohol before heating. Surface, but be careful not to scratch the PTFE release layer. https://www.chbu...
Hot melt butt welder The hot melt butt welder is a special welding equipment
01 Aug 2018
Hot melt butt welder The hot melt butt welder is a special welding equipment that applies hot melt butt joint technology to weld thermoplastic pipe fittings. The welding frame of the hot melt butt welder is separate from the operating system. The whole machine (automatic type, hydraulic semi-automatic type) is composed of hydraulic operation console, welding frame and fixture, electric heating plate and electric milling cutter. The manual type has no hydraulic system. The welded frame is made of high-strength aluminum alloy material, which is firm in structure, light and durable. The welding frame adopts a ferrule mica sheet pressing structure, and the positioning pipe is accurate, and it is easy to adjust the amount of misalignment. Introduction There are various forms of hot-melt butt welder. Users should choose according to the specifications of welded pipe, their own economic bearing capacity, the quality of operators and the management level of welding machine quality. According t...
Tungsten argon arc welding safety regulations
23 Jul 2018
1) The welding work site must be equipped with fire protection equipment, such as sand boxes, fire extinguishers, fire hydrants, buckets, etc. The flammable materials shall not be less than 5m away from the welding place. If the specified distance cannot be met, it can be covered with asbestos board, asbestos cloth, etc. to prevent Mars from falling into flammable materials. Explosive items shall not be less than 10m away from welding. The argon arc welding work site should have good natural ventilation and fixed mechanical ventilation to reduce the hazards of argon arc welding of harmful gases and metal dust. 2) Manual tungsten argon arc welding machine should be placed in a dry and ventilated place, in strict accordance with the instructions for use. The welder should be thoroughly inspected before use. Make sure there are no hidden dangers and then turn on the power. After the no-load operation is normal, the welding can be performed. Ensure that the welder is wired correctly and mu...
Daily maintenance and maintenance of welding machine
05 Jul 2018
The electric welder uses the high-temperature arc generated by the positive and negative poles in an instantaneous short circuit to melt the solder and the material to be welded on the electrode to achieve the purpose of combining them. The structure is very simple, it is a high-power transformer. The welding machine can be divided into two types according to the type of output power, one is AC power; the other is DC. It is made by the principle of inductance. When the inductance is turned on and off, a huge voltage change is generated. The high-voltage arc generated by the positive and negative poles in the instant short circuit is used to melt the solder on the electrode to achieve the combination. The purpose of the welding machine can not be ignored during maintenance and maintenance. Electric welder routine maintenance 1. Check the welder output wiring specification, firm, and the outlet direction is close to vertical, and the angle with the horizontal must be greater than 70°. 2....