Five precautions for operating the machine in the production process of aluminum extrusion

1. Furnace with aluminum rods

It is necessary to install aluminum rods with suitable length, correct material, smooth surface without grooves, and guaranteed quality (crystallization, composition, density, and no over-burning) according to the requirements of the production list and the actual situation of the mold. And pay attention to the identification and spacing of different aluminum rods. Pay attention to the position of the furnace and the width of the chain, pay attention to each other and not loose (use angle iron to block, do not use aluminum that is easy to soften at high temperature) to prevent the furnace from plugging, and pay attention to the aluminum rods not to loose or fall during the operation Personal injury and equipment accidents. Frequently check the firmness of chains, pins, runners, tension columns and other equipment. Frequently check the actual temperature of the aluminum rod and the data of the meter value (not exceeding 560 degrees), properly cool down (below 520 degrees) when the machine stops for a long time, and always check whether the torch gun is running, the circulating fan is running, the cooling water (water pump) and other equipment are in good condition .

2. Operate the extruder

The extruder operator must pay attention to the following matters before formal operation to ensure the normal, safe and continuity of production.

(1) Check whether the equipment is normal, whether the operating parts of the machine are in place, whether the sliding plate is lubricated, whether the travel switch of the sensing device is activated, whether the fasteners (screws), etc. are loose, whether the circulating cooling water is turned on, and whether the oil level is sufficient , Whether the oil temperature is normal, whether the oil pump has abnormal noise, whether the working speed is normal, and whether the movement conversion is normal.

(2) Check the condition of the rod furnace (refer to Article 1), check the extrusion center line, check the heating of the extrusion cylinder, and the fluctuation of the heating instrument. The operation of tractor, material bed and rear equipment. Whether various operating tools and maintenance hardware tools (molds, pads, cake presses, press plates, clamps, hammers, pliers, wrenches, screwdrivers, screw knives, crowbars, thermal insulation tops, plastic tools, etc.) are fixed at the work site , Drive, whether the mold heating furnace is normal. Whether all kinds of quenching cooling fans are running. Whether the various measuring tools are complete and correct.

(3) Whether there are irrelevant personnel on site, whether there are maintenance personnel, whether there are visiting and inspecting personnel, whether there are new learning personnel, relevant personnel should be discouraged, inquired, reminded, and prevented according to the actual situation and based on the principle of safety. Interpretation, training, guidance, demonstrations, etc., and confidential work should be done when necessary for outsiders who are not accompanied by leaders. Coordinate production according to schedule, team personnel, and pay attention to the orderly connection of each process.

(4) Understand the production content, production requirements, production sequence, and make corresponding real data records during production. The writing is clear and the production date is marked, so that it can be verified, traceable, can be used for reference, and can be cited. The drawings, forms, materials, documents, etc. of the production profile must be prepared in advance and familiar with the chest.

3. Aluminum profile stretching

(1) The aluminum profiles on the cooling bed shall not be rubbed, pulled, overlapped, crowded, or entangled in the process of reclaiming, moving and stretching, and a certain interval shall be reserved between each other. The profiles that are easy to bend and the length of the output should be processed in time, and mutual protection should be done if necessary.

(2) When the profile is stretched, the profile must be cooled to below 50 degrees (bare hands can hold it tightly) before it can be moved to the stretching rack for stretching. If the temperature is too high, stretching will burn the human body and burn the top. Moreover, because the internal stress of the profile cannot be completely eliminated, waste products such as bending, twisting, and poor performance appear before and after aging.

(3) Because the top has the effect of preventing heat dissipation, the profiles with high decorative surface requirements must be turned up and down to facilitate uniform heat dissipation and reduce the lateral bright spot defects caused by uneven heat dissipation and crystallinity, especially for large widths. It is more important to pay attention to the surface and thicker profiles.

(4) Pay attention to the small feet of profiles with high width-to-thickness ratio, long overhangs, large arcs, large disparity in wall thickness, strange shapes, thin teeth, long legs, arc surfaces, inclined surfaces, openings, angles, etc. Force conditions to prevent partial or spot size deformation, twisting, spiraling and other defects of the profile.

(5) The stretching amount is controlled at about 1%. For example, the stretching amount of a 25M profile should be stretched about 25cm after the profile is straightened, but it must not exceed 2%. During production, it should be adjusted according to the actual situation of the profile discharge and various specific requirements (opening size, surface quality, external size, inner diameter size, wall thickness size, elongation, etc.), and seek to meet the conflicting technical requirements at the same time. A specific amount of stretching required. Excessive stretching will cause dimensional deviation of the head, middle and tail, water-like twist (fish scale) marks on the surface, low elongation, high hardness and brittleness (low plasticity). Too low a stretching amount will make the compression strength and hardness of the profile lower, and even aging (quenching) cannot increase the hardness, and the profile is easy to bend in an arc (commonly known as a big knife bend).

(6) In order to control the amount of tensile deformation and better control the dimensional changes of the entire profile, appropriate special pads and appropriate methods must be used. Especially for open material, arc material, cantilever material, and curved profile, more attention should be paid to the reasonable and effective use of stretch clamp. When necessary, the middle of the stretched profile should be controlled by a person to centralize or cushion to ensure that the size of the stretch between the head, middle and tail sections meets the profile requirements.

4. Aluminum profile sawing and framing

(1) The material on the conveying rack should correspond to the material head and the joint mark, the profiles should not be rubbed against each other, and the long and short materials should be protected from each other. The profile should be straight forward and backward, and the cut surface should not be inclined. Check the top of the rack and the wrapping of the plastic parts. Pay attention to rubbing against the exposed iron rack and other sharp and hard metals.

(2) Oxidation, spraying, sandblasting, rounding, punching, material, sawing, packaging, aging, natural materials, and other post-processing requirements, and profiles of different materials should be framed and transported separately.

(3) When framing, pay attention to the cantilever length profile, thin wall profile, circular arc profile, open profile, solid small section profile, plate, high surface requirement profile, interlocking, self-locking or difficult to separate profiles, etc. The frame method and method, as well as the necessary auxiliary tools, lining paper bushing, etc. The cushion strips (pads) should be aligned up and down, arranged correctly, with appropriate spacing, and the number is appropriate, (some are easily deformed, and high-surface profiles should not be placed on the cushion strips) can bear the weight of the profile and a certain amount of force, and cannot be pushed or stacked . The profiles that need to be overhead framed must be stacked overhead.

(4) Pay attention to the position where the profiles are stacked in the frame to avoid the lightness and weight of the two ends, which may cause accidents such as stacking and slipping of the profiles. Pay attention to the sawing speed, the burrs on the sawing surface, and observe the size of the sawing machine's fuel injection to adjust. Pay attention to the pressure of the sawing machine (stroke, light and heavy). Pay attention when sawing operation to avoid personal safety injury accidents. When sawing, it is strictly forbidden to use force on both sides of the profile to avoid clamping and sawing during the sawing of the profile, which will cause the cutting action to occur and immediately damage the material and hurt people.

(5) Pay attention to the aluminum shavings to be blown off, the burrs to be scraped off, the interval should be appropriate, the lifting should be safe, and the stacking frame should be aligned. The number of stacked frames cannot exceed the 4-layer quantity requirement specified by the company.

(6) Lifting and framing should be handled with care, small materials, thin materials, long materials, flat materials, solid small materials and other flexible materials must be lifted in the middle, and pay attention to double the length of the cut (saw cutting, Whether the remaining amount of the oxidation chuck will cause difficulty in the processing and production of the subsequent processes (saw cutting, oxidation, packaging, lifting, transportation), affect efficiency, or even fail to normal processing and production.

5. Aging transfer of aluminum profiles

(1) When aging, try to follow the material, thickness, size, hardness requirements, and performance requirements of the same and similar profiles placed in the same furnace for aging treatment. The aging profile must be strictly operated in strict accordance with the aging process corresponding to the furnace profile, and must not be changed without authorization or perfunctory.

(2) Pay attention to the circulation fan, circulating cooling water operation, pay close attention to the ignition heating, the heating error in the furnace, the heating speed in the furnace, the heat preservation, and pay attention to the safety and sealing of the furnace door.

(3) Pay attention to oil and gas leakage, ventilation, and safety in high-temperature combustion environments.

(4) Pay attention to the falling material of the lifting, loading and unloading frame, and pay attention to the safe distance between the driving and the material frame and itself.

(5) It is strictly forbidden to stay in the aging furnace, and must be properly protected when entering the furnace for work, and adults must be outside to observe and protect. Avoid bringing in combustible and explosive materials in the furnace, and strictly forbid non-productive purposes such as baking, heating, sleeping, etc.

(6) The profiles with different post-processing requirements shall not be combined and framed, and shall be transferred to each production department together with the process card (manufacturing subpoena) according to the post-processing requirements. Make a record of each form of the process truthfully for verification. It is necessary to explain clearly the situation of the shift in person when transferring shifts.