JB/T 9947-1999 This standard is a revision of ZB J65 004-88 "Woodworking Pin Hole Drill". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies the types and sizes, technical requirements, test methods, inspection rules, marking and packaging of woodworking pin hole drills. This standard is applicable to woodworking pin hole drills with guide centers and countersinks for drilling various woods and artificial boards on woodworking drilling machines. This standard was first issued on October 12, 1988. JB/T 9947-1999 Woodworking Pin Hole Drill JB/T9947-1999 Standard download decompression password: www.bzxz.net

IC$ 79.120.10
Machinery Industry Standard of the People's Republic of China
JB/T9947—1999
Woodworking Pin Hole Drill
1999-05-14 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/9947-1999
This standard is a revision of J6500488 for Woodworking Pin Hole Drill. During the revision, only the relevant provisions were revised and the technical content was not changed.
This standard replaces JB3650488 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard was proposed by the National Committee for Standardization of Machine Tools and Small Tools, and this standard is under the jurisdiction of Fuzhou Woodworking Machine Tool Research Institute. This standard is issued by: Zhanerbin Third Tool Factory, Dongliwei Woodworking Machinery Tool Co., Ltd. The main drafters of this standard are: Chou Shihong, Fu Zhimu, Yang Hengsheng. This standard was first issued on October 12, 1988. Model map
Machinery Industry Standard of the People's Republic of China
Woodworking Pin Hole Drill
JO/T9947—1999
Generation ZB J65 00488
This standard specifies the type and size, technical requirements, test methods, inspection rules, marking and packaging of wood pin hole drill (above simplified pin head).
The standard is applicable to wood pins with guide center and notch blade for drilling various materials on non-stationary machines.
Cited standards
The following standards contain the meanings, which shall be construed as the provisions of this standard when cited in this standard. When this standard is published, the versions shown shall be valid. All parts of the standard shall be revised. Parties using this standard shall consider the possibility of using the new version of the underlined standard GB125571990
This machine tool performance is safe to purchase
GB/T48971992 Shavings head
YR 12—1977
3 Types and dimensions
Gaojin tool steel technical parts
3.1 The drill bit can be manufactured into single-piece type: [type (four grooves) and type II (two grooves), the shank type of the temporary head is straight (it can also be made into other types according to the needs of the application
3. The type and size of the drill bit shall be as specified in Figure 1 and Table 1. 3.1.2 The type and size of the drill bit shall be as specified in Figure 2 and Table 1. Figure 1
Guohao Machinery Industry Bureau approved on May 14, 1999 20 00-01-01 Implementation
Series
Series 2
3.2 Marking Example
JB/T9947-3999
Table 1 Drill Bit Size
15°~20
TWorking Part Straight Drawing t is [Qm, L is T0mm, Type 1, Left Top Drill Bit: 30
Tai-Pin Hole Drill 10×70-[9947—[999 Rock Drill Bit "Name" can be omitted:
4 Technical Requirements
4.1 The drill bit surface shall not have cracks, black spots, rust, collapse, scratches and other defects. 4.2 The maximum allowable value of the drill bit surface thickness is as follows:
before cutting and after cutting
JB/T9947-1999
2. The surface roughness of the pin head
less drilling surface
4.3 The runout tolerance of the drill bit 1. The sizing of the part is measured on the axis of the cutting part: tw1omm is 0.06m
>1omin is .08m m
4.4 The tolerance of the axis of the work part of the drill head is 0.2mm4.5 The diameter of the work part of the drill head is 0.1~0.15mm4.6 The drill core of the work part of the drill head is 0.2~0.1mm in length of 100mm. m
4.7 The drill bit material is made of W6Mo5Cr4V2, W18Cr4V or high-speed steel with material properties not lower than YB12. The hardness of the work part of the drill bit is 62-65HRC.
5 Test method
5.1 The performance test of the drill bit should be carried out on a machine tool that meets the precision standard. All legal requirements should be in accordance with the provisions of GB12557. 5.2 The test material uses the scratch plate specified in GB4897. 5.3 The test cutting specification also meets the provisions of length 3. Table 3 Cutting performance specification
Drill diameter
Drill speed
2800-4000
Entry depth
5.4 After the test, the hole on the test piece should not have burn marks and notches at the entrance. Drilling depth
Drilling diameter 3 Stop depth
About 2 times the drill diameter
5.5 After the test, the drill bit shall not have any signs of edge wear and obvious blunting, and can continue to be used. 6 Inspection regulations
6.1 The method for measuring the drill position shall be in accordance with the provisions of Appendix A (Appendix to the standard). The number of holes
6.2 The drill bits shipped from the factory shall meet the various functional requirements specified in the Jinping standard. The drill bits shipped in batches shall be marked and packaged in accordance with the relevant standards.
7. 1 Marking
7.1.1 The drill bit should be marked with: manufacturer’s trademark, working part diameter 7.1.1 The drill bit packaging box should be marked with: product name, standard number, manufacturer’s name, address and trademark, drill bit working part diameter: total length, material, quality number, manufacturing year and month, 7.1 Packaging
7.2.1 The drill bit should be treated with rust prevention before packaging, and the head after packaging can ensure that it will not be damaged during transportation. 7.2.2 The packaging box should be accompanied by a quality certificate.
Inspection items
Working part||t t||Radial runout of the drill bit diameter to the center line of the shank axis
Coaxiality of the drill bit with the center line of the shank axis
Special working part
Measurement method
JO/T9947-1999
Appendix A
(Standard time record)
Measurement method of the hole position tolerance in this workwww.bzxz.net
Insert the drill bit shank into the special inspection||t Put the pin head into the hole of the special inspection tool; fix it with a screw; touch the dial gauge probe against the concave surface of the drill bit, read the percentage meter number, then rotate the drill bit, read the inverse number of the dial gauge on the symmetrical belt, and take the total difference. Put the pin head into the hole of the special inspection tool; fix it with a screw; touch the dial gauge probe against the concave surface of the drill bit, read the percentage meter number, and then rotate the knot. 180°, read the difference in the readings on the two symmetrical surfaces, use the above-mentioned measurement method to measure the two pairs of surface percentage indicator readings, and then take the maximum difference. Special percentage indicator with 0.01 scale: daily percentage indicator: platform: special percentage indicator with 0.01 scale: continental main percentage indicator stand; platform
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