JB/T 3789-1997 Knife sharpening machine

JB/T 3789-1997 This standard is a revision of JB 3789-84 "Knife Sharpener". This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of knife sharpeners. This standard applies to knife sharpeners for sharpening straight blades. JB/T 3789-1997 Knife Sharpener JB/T3789-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T3789—1997
Sharpener
Published on June 20, 1997
Ministry of Machinery Industry of the People's Republic of China
Implemented on January 1, 1998
JB/T3789—1997
This standard is a revision of JB3789—84 "Sharpener". From the date of entry into force, this standard will replace JB3789—84. This standard is proposed and managed by the National Technical Committee for Printing Machinery Standardization. The drafting unit of this standard: Hunjiang Printing Machinery General Factory. The main drafter of this standard: Wu Shangyu.
1 Scope
Machinery Industry Standard of the People's Republic of China
Sharpener
JB/T3789—1997
Replaces JB378984
This standard specifies the types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of sharpeners. This standard applies to sharpeners for sharpening straight blades. 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 parties using this standard should explore the possibility of using the latest versions of the following standards. GB19185
GB522685
GB/T1330691
JB309082
ZB J50 011—89
3 Type and basic parameters
3.1 Type:
Packaging, storage and transportation pictorial symbols
General technical conditions for machine tool electrical equipment
Product model compilation method for printing machinery
Technical conditions for machine tool painting
a) According to the grinding principle: peripheral grinding type and end grinding type: b) According to the movement form: grinding head reciprocating type and worktable reciprocating type: c) According to the transmission mode: mechanical transmission type and hydraulic transmission type: d) According to the blade clamping method: mechanical clamping type and electromagnetic clamping type. Basic parameters (see Table 1).
Maximum grinding size
Machine specifications
Worktable rotation angle
The model and name of the knife grinder shall comply with the provisions of JB3090 3.3
4 Technical requirements
0°90, 0°~±45°
4.1 The knife grinder shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. Approved by the Ministry of Machinery Industry on June 20, 1997
Implementation on January 1, 1998
Mechanical accuracy (see Table 2).
JB/T3789-1997
Flatness of the work surface of the workbench (no bulge in the middle)Parallelism of the work surface of the workbench to the longitudinal moving direction of the frameAxial runout of the spindle of the end-grinding grinding head
Radial runout of the spindle of the peripheral grinding head and the runout of the shoulder end face4.3
Working accuracy (see Table 3).
Straightness of the blade edge after grinding
Roughness of the grinding surface of the blade after grinding
The sharpening machine should run smoothly and the operating mechanism should be flexible and reliable. The working temperature rise of the bearing should not exceed 35℃.
Noise is not more than 80dB (A)
≤0.03/1000
≤0.06/1000
1600~2050
≤0.04/1000
≤0.08/1000
1600-2050
≤0.101000
Not less than 1.6Hm
The protective device for the grinding wheel and coolant splashing out of the grinder should be complete and reliable. Electrical system
The insulation resistance between the housing and the power supply line is not less than 1M2.4.8.1
The withstand voltage is 1500V (50Hz).
The knife grinder should have a reliable grounding device and sign, and the grounding resistance should not be greater than 0.12.4.8.3
Appearance quality
The exposed processed surface should not have rust, bumps and obvious scratches. The exposed non-processed surface should not have defects such as bulges, depressions and pores. 4.9.2
Except for the paint color, the product paint quality should comply with the provisions of ZBJ50011. Test method
Idle running test
The knife grinder idle running test shall not be less than 2h, and the operation condition shall be visually inspected to comply with the provisions of 4.4 and 4.7. 5.2 Inspection of the accuracy of the knife grinder
5.2.1 Inspection of the flatness of the working surface of the workbench mm
≤0.06/1000
<0.101000
≤0.12/1000
a) Place a ruler on each working surface of the workbench with two adjustable pads so that the readings of the micrometer at both ends of the ruler are the same:
b) Place the support at 2 /9, the accuracy of the measuring ruler should not be lower than Class 1. When measuring in the length direction, the ruler used should not be less than 1000mm:
JB/T3789-1997
c) The micrometer is placed on the working surface of the workbench so that its measuring head is in vertical contact with the working surface of the ruler and moves along the ruler d) The inspection is carried out in no less than two longitudinal, three transverse and two diagonal directions, and the results should comply with the provisions of 4.2. 5.2.2 Parallelism inspection of the working surface of the workbench to the longitudinal movement direction of the frame. The working surface of the workbench is placed in the horizontal and rotation limit positions respectively, the micrometer is fixed, the workbench is moved, and the micrometer is used to measure the parallelism between the running direction and the working surface of the workbench, which should comply with the provisions of 4.2. 5.2.3 Inspection of the runout (jump) of the grinding head spindle Inspection of the axial runout of the end-grinding type grinding head spindle: Place the steel ball in the center hole of the spindle, fix the dial gauge on the machine, make the measuring head contact the surface of the steel ball, and measure the axial runout of the grinding head spindle, which should comply with the provisions of 4.2. Inspection of the radial runout and shoulder end face runout of the peripheral grinding type grinding head spindle: Fix the dial gauge on the machine, make the measuring head directly contact the center generatrix of the spindle vertically, rotate the spindle, and measure on two mutually perpendicular planes, which should comply with the provisions of 4.2. 5.3 Knife grinding test
Install the blade that meets the requirements of Table 1 on the workbench and conduct the knife grinding test. After the knife is ground, check the accuracy of the blades respectively. 5.3.1 Inspection of blade straightness
Keep the sharpened blade on the workbench in the clamped state during sharpening, place the inspection ruler close to the cutting edge of the blade, make the ruler perpendicular to the sharpening surface of the hand knife, use a feeler gauge to check the gap between the blade and the ruler (except for blade angles close to 90°), and inspect the straightness of the blade edge after sharpening according to Table 3 in 4.3. 5.3.2 Inspection of sharpening surface roughness
After the blade is sharpened, use a surface roughness meter to inspect the roughness of the sharpening surface of the blade after sharpening according to Table 3 in 4.3. 5.4 Measurement of bearing operating temperature
After the sharpening test, measure the bearing operating temperature with a point thermometer, which shall comply with the provisions of 4.5. 5.5 Noise test
When the machine is running idly at rated speed, use an ordinary sound level meter to measure the noise at four points at a height of 15m and 1m outside the center of the machine. The arithmetic average of the noise values ​​at the four points shall comply with the provisions of 4.6. 5.6 The electrical system test shall be carried out in accordance with 13.1, 13.2 and 13.3 of GB5226-85, and the results shall comply with the provisions of 4.8. 5.7 Visual inspection of product appearance quality shall comply with the provisions of 4.9. 6 Inspection rules
6.1 Factory inspection
6.1.1 Each product shall be inspected by the quality inspection department of the manufacturer in accordance with the provisions of 5.1, 5.2, 5.6 and 5.7 before leaving the factory. If any one of them fails, the product shall be considered a defective product
6.1.2 5% (not less than 1 unit) of each batch of products shall be sampled and inspected in accordance with the provisions of 53, 5.4 and 5.5. If any one of them fails, the item shall be double sampled for re-inspection. If it fails again, the item shall be inspected one by one. 6.1.3 Each product shall be inspected and qualified by the quality inspection department of the manufacturer before leaving the factory. 6.2 Type testbzxZ.net
When there are major changes in the design, process, materials or components of new products that may affect product performance, as well as when new products are identified or production is resumed after a one-year suspension, a full inspection should be carried out according to the items specified in this standard. 3
Product completeness
a) Main machine:
b) Motor and electrical control equipment:
c) Necessary accessories and wearing parts:
d) Tools necessary for operation and maintenance.
8 Marking, packaging, storage, transportation
JB/T3789-1997
8.1 Each product should be fixed with a label in an obvious position, and the label should comply with the provisions of GB/T13306. Its contents include: a) Manufacturer name:
b) Product model and name;
e) Main technical parameters;
d) Factory number:
e) Factory date.
8.2 Packaging, storage and transportation signs should comply with the provisions of GB191. 8.3 Before packaging, exposed parts should be treated with rust prevention. 8.4 Waterproof materials should be laid in the packaging box, and the product should be firmly fixed in the box. The packaging box should meet the requirements of transportation and loading and unloading. 5 The outer wall of the packaging box should be marked with the manufacturer's name, the name and address of the receiving unit, and the product model, name, factory number, volume, weight, 8.5
lifting line, center of gravity and upward and other words or signs. The words and logos should be clear and neat, and should not be blurred due to rain erosion and long-term use. 8.6 Each product should be accompanied by the following technical documents when leaving the factory: a) Packing list;
b) Factory certificate;
c) Instruction manual.
8.7 After the product is packed, if the storage period exceeds 1 year, it should be unpacked for inspection. If it does not meet the requirements, it should be re-sealed. Quality Assurance
If the user complies with the various regulations shown in the product instruction manual, within 1 year from the date the product arrives at the receiving location, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace parts (excluding wearing parts) free of charge. 4
Mechanical Industry Standard
Sharpener
JB/T3789—1997
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2, Shouti South Road, Beijing: Postal Code 100044)
Format 880×1230
Sheet 1/2
Word Count 10000
First Edition in September 1997
First Printing in September 1997
Print Quantity 1-500
Price 500 Yuan
97-164
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cnL661-68 /
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