JB/T 9887-1999 This standard is a revision of ZBn J58 007-88 "Technical requirements for the manufacture and acceptance of boring heads for modular machine tools". This standard is a concretization and supplement to GB/T 9061-1988 "General technical conditions for metal cutting machine tools". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies the manufacturing and acceptance requirements for boring heads for modular machine tools. This standard is applicable to boring heads for modular machine tools with a nominal size of 100~630mm. This standard was first issued in 1988. JB/T 9887-1999 Technical conditions for boring heads for modular machine tools JB/T9887-1999 Standard download decompression password: www.bzxz.net

1C.5 15.060. 99
Machinery Industry Standard of the People's Republic of China
JB/T9887-1999
Technical Conditions for Boring Heads of Modular Machine Tools
Published on May 20, 1949
State Bureau of Machinery Industry
Implemented on January 1, 2000
JB/T9887--1999
This standard is designed on the basis of ZBJS8007-88 "Technical Requirements for Boring Heads of Modular Machine Tools". This standard is a concretization and supplement to GB/T9061-1988 "General Technical Conditions for Metalworking Machine Tools". This standard is consistent with the technical content of ZBnJ58007-88, and has only been re-edited according to relevant regulations. This standard replaces 2BnJ58007---88 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. The drafting unit of this standard is Dalian Combined Machine Tool Research Institute. This standard was first issued in 18.
Machinery Industry Standard of the People's Republic of China
Combined Machine ToolsWww.bzxZ.net
Boring Heads and Technical Parts
This standard specifies the construction and acceptance requirements for boring heads of combined machine tools. This standard is applicable to combined machine tool boring heads with nominal sizes of 100-630mm. 2 Reference Standards
JB/T 9887-1999
Generation 7.Hm J5KUI17.-88
The texts contained in the above-listed standards will become the provisions of this standard through reference in this standard. When this standard is published, the version shown is valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: B/T3668.91983
Group general machine tool parts soil drawing parts dimensions GB/T 5900—1997
GB/T9061—1988
JB/T15341993
JB/T2462.26—1999
JB/T3039—1992
JO/T3997—1994
JB.T 9872—1999
JD/T 98741999
3 General requirements
Machine tool spindle end and faceplate size General technical conditions for metal cutting machine tools
Combination machine tool general technical parts
Combination machine tool general parts Single axis and turning head size Combination machine tool head cutting accuracy
Metal cutting machine tool East cast iron parts Technical parts
Metal cutting machine General technical conditions for mechanical processing General technical conditions for metal cutting machine tool assembly When inspecting and boring the front head according to this standard: It is necessary to inspect and accept the remaining acceptance items that are not specified in the standards such as GB/T9061, JB/T9872, JR9874, JR/T1534, etc. 4 Fusion machine attachment
4.! In order to ensure the basic performance of the orange head cutting, the speed change gear, pulley and other parts are provided according to the production requirements. 4.2 For this product, the seals provided shall be twice the number of accessories used for this product. 4.3 For other parts of this product, there must be fastening screws, positioning pins (or positioning keys) for installation, and ring nails for lifting. Note: Random accessories are generally marked with corresponding marks or removal: 5 Manufacturing quality
5.1 The dimensions of the machining head shall comply with the provisions of (1/T3668.9 for single-axis machining and end-face machining and JBT2462.26 and corresponding technical documents
5.2 The groove type and connection core of the front end of the spindle shall comply with the provisions of GB/T 5900. Approved by the National Paint Machinery Industry Bureau on May 20, 1999, and January 1, 2000 Implementation
JErL9887-1999
5.3 The technical conditions of the castings shall comply with the provisions of B/T3997: 6
Idle running test
6.1 Place the cutting head on the corresponding test bench for an idle running test of less than 2 hours. When the speed of the pump is changed, all speed changes should be tested. The conversion operation should be accurate and reliable, and the pump should be rotated in sequence from the lowest speed. The running time of each speed level shall not be less than 2 hours. At the highest speed, it should be operated or until the conveyor bearing reaches a stable temperature (t should be less than 30 minutes.
When the gears and pulleys are changed, It can be operated at low, medium and high speeds. 6.2 Check the idle power of the spindle system (excluding the idle power of the motor itself), and the motor rated power. 25%
General: For batch production, 5% of the batch can be sampled, but it must not be less than the machine. 6.3 The spindle speed should meet the design requirements, and the error should not exceed ±5%. 6.+ There should be no obvious movement of the spindle head during high-speed operation. 7 Load test
7.1 The main conditions for the load test,
) The corresponding test bench:
h] The material of the test piece is HT200 or 45 steel: c) The corresponding high-quality alloy tool;
d! The diameter of the hole to be selected during the test should conform to the following standard: The pin diameter is in accordance with the formula! 1 Calculation:
D-(6-0.9).
Where D..-
The maximum allowable hole diameter of the component, mm,
The apparent large hole diameter of the mirror head is shown in Table 1,
Nominal size of the light cutting head
Maximum hole diameter
7.2 According to the test system specified in 7.1, use the cutting distance and cutting measurement specifications that reach the larger load calculated in the design to make the cutting judgment. At this time, all structural work should be stopped normally. There should be no obvious vibration or other regular phenomena on the surface of the test piece. 8 Working accuracy inspection
The working accuracy inspection of the palm cutting head should comply with B/T3039. 9 Geometric accuracy inspection
The accuracy of the head should be inspected according to the items specified in JB/T3039, and the inspection results should be recorded in the product certificate:
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