Some standard content:
QB/T2418—1998
This standard is a revision of ZBY910161990 "ZCQ22 Type Knife Roller Bamboo Cutting Machine". The technical content is modified as follows: The production capacity of the bamboo cutting machine in the original ZBY910161990 "ZCQ22 Type Knife Roller Bamboo Cutting Machine" is 5t/h~7t/h, and the main motor power is 55kW. After several years of use, it is reflected that the power is too small, and it is now changed to 75kW, and the production capacity is adjusted to 7t/h~8t/h. When revising the standard, in order to reduce the vibration of the equipment, reduce noise, and improve the working environment, the accuracy level of the shape and position tolerance of the knife roller shaft has been appropriately improved, and the residual unbalance of the knife roller rotation has been appropriately reduced. In the production capacity determination of the original standard test method, when the moisture content of the bamboo material is greater than or less than 20%, it is converted to 20%. This revision of the standard takes into account that the production capacity of bamboo cutting machines has a certain range, and the actual measurement cycle of bamboo material moisture content is relatively long, and the weight of bamboo material is also calculated based on actual weighing. Therefore, the conversion calculation method was cancelled when the standard was revised. From the date of implementation, this standard will also replace the professional standard ZBY91016-1990 issued by the former Ministry of Light Industry. This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Light Industry Machinery Standardization Center. The drafting unit of this standard: Zhenjiang Light Industry Machinery Factory. The main drafter of this standard: Kang Licheng.
1 Scope
Light Industry Industry Standards of the People's Republic of China
Knife Roller Bamboo Cutting Machine
QB/T 2418--1998
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of the knife-cut bamboo cutting machine (hereinafter referred to as the "bamboo cutting machine").
This standard is applicable to the ZCQ22 bamboo cutting machine for cutting bamboo raw materials in pulp and paper mills. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB191-1990 Packaging, storage and transportation graphic marking
GB/T1801-1979 Tolerance and fit size to 500mm hole, shaft tolerance zone and fit GB3/T1958-1980 Shape and position tolerance detection regulations GB/T3077--1988 Technical conditions for alloy structural steel GB/T 11352--1989
Casting carbon steel parts for general engineering
GB/T13306-1991Sign
General technical conditions for light industrial machinery
GB/T 14253—1993
GB/T 16769---1997
Method for measuring the sound pressure level of metal cutting machine toolsQB/T 1565—1992
Roller cutter blade
QB/T1588.1--1992General technical conditions for welded parts of light industrial machineryGeneral technical conditions for cut parts of light industrial machineryQB/T 1588.2-1992
General Technical Conditions for Light Industry Machinery and Assembly
QB/T1588.3—1992
QB/T1588.4-1993General Technical Conditions for Painting of Light Industry Machinery QB/T1588.5-1996General Technical Conditions for Packaging of Light Industry Machinery 3 Product Classification
3.1 Type
3.1.1 Bamboo cutting machine should be made into The structure type consists of material conveying, feeding, dust collection and material discharging conveying. 3.1.2 Bamboo cutting machine is divided into two types according to the position of the transmission mechanism: left-hand machine (Z type) and right-hand machine (Y type). Facing the material discharging port, the transmission is placed on the left side for the left hand machine, and vice versa for the right hand machine. 3.2 Model
The model of bamboo cutting machine is ZCQ22, which means: approved by the State Bureau of Light Industry on November 25, 1998
1999- 06-01 Implementation
3.3 Basic parameters
Bamboo cutting machine basic parameters are shown in Table 1.
Production capacity, t/h
Actual cutting length of bamboo slices. mm
Flying knife blade rotation diameter and length, mm
Roller speed, r/min
Number of flying knives, pieces
Number of bottom knives, pieces
Main motor power, kw
4 Technical requirements Request
4.1—General requirements
QB/T2418—1998
Series serial number
Product classification code (cutting machine)
Product category code (forage preparation)
Papermaking industry code
$430×690
4.1.1 Bamboo cutting machines shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1.2 The manufacture of bamboo cutting machines shall comply with the provisions of GB/T14253. 4.1.3 Welded parts shall comply with the provisions of QB/T1588.1. 4.1.4 Cutting parts shall comply with the provisions of QB/T1588.2. 4.1.5 Bottom knives and flying knives shall comply with the provisions of QB/T1565. 4.2 Product performance
4.2.1 The production capacity shall comply with the provisions of Table 1. 4.2.2 The qualified rate of bamboo pieces shall not be less than 85%.
Note: The qualified rate of bamboo pieces is the ratio of the mass of bamboo pieces with a length not exceeding 50mm to the mass of the sampled bamboo pieces. 4.3 Processing requirements for main components
4.3.1 Cutter roller
a) The material shall not be lower than ZG270-500 in GB/T11352 and shall be annealed; b) The straightness tolerance of the three bearing surfaces over the entire length shall be 0.20mm in the length direction and 0.06mm in the width direction; c) The hole size tolerance matching the cutter roller shaft shall be H8 in GB/T1801, and the surface roughness R shall not be greater than 3.2um. 4.3.2 Knife roller shaft
a) The material is not lower than 40Cr in GB/T3077 and has been tempered; b) The radial runout tolerance of the two supporting journal surfaces to the common axis of the center holes at both ends is 0.045mm; c) The radial runout tolerance of the two cone surfaces to the common axis at both ends is 0.035mm; d) The size tolerance of the journal matching the knife roller is t8 in GB/T1801, and the surface roughness R is not greater than 1.6μm. 4.3.3 Bottom knife seat
a) The material is not lower than ZG270-500 in GB/T11352; and has been annealed, b) The straightness tolerance of the knife surface over the entire length is 0.20mm in the length direction and 0.08mm in the width direction. 4.4 Assembly quality
4.4.1 All parts must be inspected and qualified. Standard parts and purchased parts must have quality certificates and can only be assembled after inspection. 4.4.2 Assembly should comply with the provisions of QB/T1588.3. 4.4.3 After the knife roller and knife roller shaft are assembled, they are statically balanced, and the residual imbalance is not greater than 20.5kg·cm. 308
QB/T 2418-1998
4.4.4 After the large V-belt pulley, flywheel, knife roller and knife roller shaft assembly are assembled, the residual imbalance is not greater than 46.0kg·cm. 4.4.5 The connection between the feeding and conveying part and the cutting part must be firm, and the H feeding part should move flexibly and lightly on the track. 4.5 Appearance quality
4.5.1 The appearance shall not have defects such as protrusions, depressions, roughness and other damages other than those specified in the drawings. 4.5.2 The edges of exposed parts and exposed joint surfaces shall be neat and without obvious misalignment. 4.5.3 Non-machined surfaces shall be painted, and the quality of the paint shall comply with the provisions of QB/T1588.4. 4.6 Running performance
4.6.1 The knife roller, feed roller and other running parts shall rotate flexibly, smoothly and without obstruction. 4.6.2 The noise (sound pressure level) of idling operation shall not exceed 85dB(A). 4.6.3 After idling for 1h at the specified speed, the temperature of the main bearing shall not be higher than 80℃, and the temperature rise shall not be greater than 40℃. 4.7 Electrical system requirements
4.7.1 The metal casing of the electrical device and the main machine shall have a grounding device, and the grounding terminal shall be located at the wiring position and marked with a protective grounding symbol. 4.7.2 A reliable electrical connection must be ensured between the metal casing of the electrical device or the metal parts that may be energized and the grounding screw. The actual measured value of the connection resistance between it and the grounding screw shall not exceed 0.12. 4.7.3 The insulation resistance measured when 500Vd.c is applied between the power circuit conductor and the protective grounding circuit shall not be less than 1MQ. 4.7.4 The electrical insulation shall be able to withstand 1000V, 50Hz AC sine wave for 1s without breakdown and flashover. 5 Test method
5.1 Determination of production capacity
The material supply must be uniform and the thickness must be reasonable during the measurement. Weigh 1t~2t of bamboo material and calculate the production capacity according to formula (1). Q
Where: Q—production capacity, t/h;
G——bamboo material weighing,t;
T——actual cutting time, min.
5.2 Determination of bamboo chip qualification rate
（1）
5.2.1 The determination of bamboo chip qualification rate is carried out in the same way as the determination of production capacity. The manual sorting method is adopted. 5.2.2 Samples are taken twice within 5min-10min after the actual cutting begins. The mass of each sample is about 2kg. The sample is measured with a scale with a resolution of no more than 5g. The bamboo chip qualification rate is calculated according to formula (2). h=
Where: h—bamboo chip qualification rate, %;
G. Qualified bamboo chip mass, kg;
G2---sampled bamboo chip mass, kg.
5.3 Circular runout and straightness are tested in accordance with the relevant provisions of GB/T1958. 5.4 Surface roughness is tested with a comparison sample. 5.5 The residual unbalance is measured at the maximum outer edge of the workpiece with a guide rail static balance frame. 5.6 Idle operation test
5.6.1 The cutting part is idle for 1 hour. During the test, the feeding conveyor and the feeding part are not connected, and the discharge conveyor belt is not installed. 5.6.2 The noise is measured with a sound level meter with an accuracy of 1.0 A in accordance with the provisions of GB/T16769. (2)
5.6.3 The bearing temperature and temperature rise are measured three times on the bearing surface with a surface thermometer with an allowable error of ±3°C. The maximum value measured is the bearing temperature, and the average value of the three measured temperatures minus the room temperature is the bearing temperature rise. 5.7 The length of the bamboo piece is measured with a ruler.
QB/T2418—1998
5.8 The speed is measured with a tachometer with a resolution of 1r/min. 5.9 The appearance quality is measured by visual inspection.
5.10 Inspection of electrical system
Visual inspection and electrical measuring instruments and meters (such as microresistance tester, 500V megohmmeter, withstand voltage tester with power of 500VA or above, etc., the accuracy of which should not be less than 0.5 level) are used for inspection. 6 Inspection rules
6.1 Factory inspection
6.1.1 Each bamboo cutting machine shall be inspected and qualified by the quality inspection department of the manufacturer in accordance with this standard and accompanied by quality certification documents before it can be shipped out of the factory. 6.1.2 The factory inspection items are 4.3~~4.7. 6.2 Type inspection
6.2.1 The bamboo cutting machine shall be subject to type inspection in any of the following situations. a) Trial production and identification of new products;
b) If there are major changes in structure, materials and processes after formal production, which may affect the performance of the bamboo cutting machine; c) During normal production, type inspection shall be carried out every two years; d) When the national quality supervision agency puts forward type inspection requirements. 6.2.2 The type inspection items are all technical requirements for the performance of the whole machine of this standard. 6.3 Sampling
6.3.1 The factory inspection shall be carried out item by item. 6.3.2 One machine shall be sampled for each type inspection, and the production capacity and bamboo chip qualification rate shall be tested at the user's factory. 6.4 Judgment rules
6.4.1 The factory inspection items adopt the full index achievement method. 6.4.2 In the type inspection items, if the production capacity and bamboo chip qualification rate do not meet the specified indicators, it is allowed to make appropriate adjustments and then conduct tests until they are qualified, otherwise the type inspection is judged to be unqualified. 6.5 When the manufacturer holds a user use report that meets the requirements, it can replace the type inspection. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Each bamboo cutting machine shall be fixed with a product label, and the form and size of the label shall comply with the relevant provisions of GB/T13306. 7.1.2 The content of the label includes:
a) model, name, product standard number, trademark; b) main technical parameters;
c) factory number and manufacturing date;
d) name and detailed address of the manufacturer.
7.2 Packaging and transportation
7.2.1 The packaging of the bamboo cutter shall comply with the provisions of QB/T1588.5. 7.2.2 The packaging storage and transportation graphic signs shall comply with the provisions of GB191. 7.2.3 The bamboo cutter shall be packaged in a frame wooden box, and it can also be shipped naked according to user requirements. 7.2.4 The accompanying documents (instruction manual, packing list, certificate of conformity) shall be complete. 7.2.5 The bamboo cutter shall comply with the relevant regulations of the railway, land, water and other transportation departments during transportation. 7.3 Storagebzxz.net
The bamboo cutter should be stored in a dry, ventilated and rainproof place. 310
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