Technical conditions of vacuum brick extruder
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1 Subject content and scope of application This standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation and storage of the vacuum brick extruder in JC343.1. This standard applies to vacuum brick extruder (hereinafter referred to as brick hungry). Other brick extruder can also be used for reference.
2 Reference standard GB 699 Technical conditions of high-quality carbon structural steel GB 1184 Specification of shape and position tolerances End note tolerances GB 1804 Limit deviations of tolerances and unmatched tolerance dimensions GB 3768 Determination of sound power level of voice sources-Simple method GB 9439 Gray cast iron parts GB l0095 involute cylindrical gear accuracy JC 401.2 Technical conditions of carbon steel and low alloy steel castings for building materials machinery JC / T 402 Cement machinery paint rust prevention technical conditions JC / T406 Cement machinery packaging technical conditions JC 343.1 Model of vacuum squeeze brick and basic parameters ZBJ19004 cylindrical gear reducer JB8 product label.
3 technical requirements
3.1 Basic requirements
3.1.1 The brick machine shall meet the requirements of JC3433.1 and this standard, and shall be manufactured according to the drawings and technical documents approved by the prescribed procedures.
3.1.2 The limit deviation of the tolerance dimension is not noted on the drawings. The machining size is implemented according to IT 14 level in GB 1804; the non-machined size is implemented according to IT 16 level.
3.1.3 The construction of the brick machine should meet the following requirements: a. Split-type mud tank; b. The base should have a reference surface for installation and testing; c. Equipped with a pressure gauge and a vacuum gauge; b. The vacuum chamber has a material level monitoring device; c. The operating mechanism facilitates automatic control; d. Easy to install and lift; e. Safety protection and overload protection.
3.2 Requirements for main components
3.2.1 The gear material of non-reducer shall not be lower than the requirements of JC 401.2 related to ZG310-570, and shall be quenched and tempered. Gear failure is performed according to level 8 in GB 10095.
3.2.2 The material of shaft parts shall not be lower than the requirements of 45 steel in GB 699, and shall be quenched and tempered.
3.2.3 When the grey box is used for the vacuum box, receiving box and mud tank, the material should not be lower than the provisions of GB 9439 on HT200, and should be aged. When using a welded structure, the welding shall comply with the relevant regulations for building material mechanical welding.
3.2.4 The reamer blade should have a hardness of not less than HRc50 from the outer edge to the inside of the working surface with a width of not less than 1/3.
3.2.5 The surface hardness of the head of the stirring blade shall not be less than 1/3 of the full length and shall not be less than HRc50.
3.2.6 The hardness of the cone sleeve and cutting blade of the extrusion section on the stirring shaft should not be lower than HRc50.
3.2.7 The inner walls of the two ends of the nose should be symmetrical to the axis of the round end stop, and the deviation should not be greater than 2mm.
3.2.8 The radial runout of the pulley should not be lower than Class 9 in GB 1184.
3.2.9 The clutch shall be subjected to a static balance test, and the allowable static unbalanced torque shall be determined in accordance with the provisions of Appendix A (Supplements).
3.2.10 Cylindrical gear reducers shall comply with the technical requirements in ZBJ 19004.
3.3 Assembly and installation requirements
3.3.1 All parts need to pass the inspection, and the purchased parts must be qualified before being assembled.
3.3.2 The contact spots on gears other than reducers should be no less than 40% along the tooth height and no less than 50% along the tooth length.
3.3.3 The radial round runout of the reamer shaft end after assembly shall not be greater than 1mm.
3.3.4 The large gap between the outer edge of the reamer and the inner wall of the mud lining shall not be greater than 1% of the diameter of the reamer.
3． 3.5 The gap between the stirring knife and the inner wall of the liner of the stirring tank should not be greater than 10mm.
3.3.6 The pressure gauge is installed 100mm above the nose of the cutter head, and the insertion depth should not exceed the inner surface of the nose.
3.3.7 After the large and small triangular belt wheels are installed, the relative displacement of the wheel width symmetrical plane should not be greater than 2/1000 of the center distance, and the axis parallelism should not be greater than 6/1000.
3.4 No-load commissioning requirements
3.4.1 There should be no abnormal sound and vibration during operation.
3.4.2 The clutch should be engaged smoothly, completely separated, flexible and reliable.
3.4.3 Noise shall comply with the provisions of JC 343.1.
3.4.4 Oil should not leak from the lubricated parts.
3.4.5 The temperature rise of the bearing shall not be greater than 35 ° C, and the maximum temperature shall not be greater than 70 ° C.
3.5 Load test run requirements 3.5.1 Load test run shall meet the requirements of Articles 3.4.1-4.3.4.
3.5.2 Electrical control devices shall be safe and reliable.
3.5.3 Extrusion pressure, vacuum degree and production capacity shall meet the requirements of JC 343.1.
3.5.4 The temperature rise of the bearing should be no more than 45 ℃, and the highest temperature should be no more than 80 ℃.
3.6 Appearance requirements The surface of the brick machine should be smooth and clean, and there should be no defects such as bumps, scratches and rust.
3.7 Paint anti-rust requirements Paint anti-rust shall meet the requirements of JC / T402.
4 test methods
4.1 Symmetry deviation of the inner wall of the two ends of the nose to the axis of the round end stop (3.2.7) is detected by the scribing method on the platform.
4.2 Detection of static unbalanced moment (3.2.9) on the balance frame.
4.3 The contact spots (3.3.2) of the gear are detected by the coloring method.
4.4 Radial round runout (3.3.3) of the reamer shaft end is detected with a dial indicator.
4.5 The gap between the outer edge of the reamer and the inner wall of the mud lining (3.3.4) and the gap between the mixing knife and the inner wall of the lining of the mixing tank (3.3.5) shall be tested with feeler gauges and plug gauges respectively. .
4.6 The relative displacements of the wheel width symmetry planes of the large and small triangular belt wheels and the parallelism of the axes (section 3.3.7) shall be detected with a ruler and a level gauge.
4.7 No-load test run
4.7.1 Test conditions: a. The assembly inspection of the whole machine is qualified, b. Lubricate the lubrication area.
4.7.2 Test method a) Continue operation for 4h; b. Noise (Article 3.4.3) shall be tested in accordance with GB3768; c. Bearing temperature rise (Article 3.4.5) shall be detected with a semiconductor thermometer.
4.8 Load test run
4.8.1 Commissioning conditions: a. After no-load commissioning is qualified, load commissioning shall be performed. Load commissioning may be performed by the user. b. Electrical control devices, gas, water, vacuum pipelines, etc. are qualified; c. Raw materials for load test should be buried at the processing place to meet the molding requirements; d. With uniform feeding device.
4.8.2 Test method: a. After the extrusion pressure and vacuum meet the requirements of (3.5.3ts), run continuously for 4h; b. Production capacity (3.5.3) Use a stopwatch to measure the speed of the mud stick, each time 2min, 3 times in total, every 5min interval, take the average of 3 times to convert the production capacity; c. Bearing temperature rise (3.5.4) using a semiconductor thermometer to detect.
5 Inspection rules Products shall pass the inspection of the inspection department of the manufacturer and be issued before the certificate is issued.
5.1 Classification of inspection Product inspection is divided into factory inspection and type inspection.
5.2 Factory inspections 3.1, 3.2, 3.3.1-3.3.5, 3.4, 3.6, 3.7, 6.1 shall be completed before leaving the factory. Article, 6.2 inspection.
5.3 Type inspection Type inspection shall inspect all the items specified in this standard. Type inspection shall be carried out in one of the following cases: a. Trial-type appraisal of new or old products transferred to the factory; b. After the formal production, if the structure, materials, and processes have changed greatly, which may affect the product performance; c. When the factory inspection results are significantly different from the last type inspection; d. Normal production is not less than once every two years.
5.4 Sampling and decision rules
5.4.1 The surface hardness of agitated blades and reamer blades produced in batches is allowed to be sampled. Each blanking batch is taken as a batch, and each batch is randomly sampled at 10%, but not less than 10 pieces. In that case, the sampling inspection should be doubled, all of them are qualified, and the inspection batch is qualified. Otherwise, the inspection lot is judged to be unqualified. 5.4.2 The prototype of the type inspection shall be randomly selected from the inspection lot, and the inspection lot shall be qualified if the inspection lot is qualified. If there is any item that fails in Article 3.5, then one unit shall be randomly selected and any item shall be inspected. If it fails, the inspection batch is judged to be unqualified. If they pass, another one will be selected randomly. Otherwise, the inspection lot is judged to be unqualified.
6 Marking, packaging, transportation and storage
6.1 The product shall be fixed with a product label at an obvious position. The label shall comply with the provisions of JB8 and shall indicate the following: a. The name of the manufacturer; b. Product name; c. Trademarks; d. Product model; e. Manufacturing date; f. Main parameters; e. Serial number. 6.2 Product packaging, transportation and storage shall comply with the provisions of JC / T 406. Appendix A Determination of Permissible Static Unbalanced Moment (Supplementary) A1 Permissible Static Unbalanced Moment is determined according to the following formula (A1): M = 10 [-6] e · G (A1) In the formula: M ---- Permissible Unbalanced moment, N · m; e ----- permissible eccentricity, (e value is determined according to the G16-level accuracy look-up table in Figure Al), μm; G ----- rotor weight, N
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