JB/T 9900.2-1999 This standard is a revision of ZB J51 002-88 "Technical requirements for manufacturing and acceptance of boring heads for horizontal fine boring machines". During the revision, only editorial changes were made and the main technical contents remained unchanged. This standard is part of the JB/T 9900 series of standards, which includes the following two parts: JB/T 9900.1-1999 Horizontal fine boring machine boring head accuracy inspection JB/T 9900.2-1999 Horizontal fine boring machine boring head technical conditions The standards supporting this series of standards are: JB/T 5564-1991 Horizontal fine boring machine accuracy JB/T 5601-1991 Horizontal fine boring machine series JB/T 5765-1991 Horizontal fine boring machine parameters This standard specifies the manufacturing and acceptance requirements for horizontal fine boring machine boring heads. This standard is applicable to horizontal fine boring machine boring heads with front bearing inner diameters of 40~120mm. This standard was first issued in April 1988. JB/T 9900.2-1999 Technical requirements for boring heads of horizontal fine boring machines JB/T9900.2-1999 Standard download decompression password: www.bzxz.net

IL'S 25.060.10
Machinery Industry Standard of the People's Republic of China
JB/T9900.1-9960.2—1999
Horizontal boring machine
1999-05-20 Issued
200-01-01 Implementation
State Machinery Industry Bureau
JB/T9900.2-1999
This standard is revised on the basis of ZR15:0?8 Technical Requirements for the Manufacturing and Acceptance of Multiple External Precision Boring Machines. This standard is No. 7 B15:02-RK is the latest in the world. This standard is a part of the series of standards for horizontal boring heads. This series of standards includes two parts: horizontal boring heads: precision inspection
JBFr9900.1
JB:T9900.2 external precision boring heads technical conditions loss standard:
JD/T5564.-[991 horizontal full bed
horizontal belt bed system
JB/T $60[-[991
JB/T576:-1591 horizontal belt bed parameters This standard replaces 2BJ5! 002-88 from the date of implementation. It was proposed by the National Technical Committee for Standardization of Cutting Machine Tools. This standard is for the comprehensive chemical system of the Jin Guo Metal Workshop, and is drafted by the Mingrui Bed Factory. The full standard was first issued in 1988. 1 Specifications of the Machinery Industry Standard of the People's Republic of China Technical Conditions for Horizontal Fine Boring Machines This standard specifies the requirements for the manufacture and acceptance of horizontal boring machines: 1. The horizontal boring machine with an inner diameter of 41-120 mm is a horizontal box bed with an inner diameter of 41-120 mm. 2. Referenced Standards JR/T 9900.2-1999 D51602-B The following standards contain exemptions, which are cited in this standard and constitute the provisions of this standard. When the standard is published, the smaller version shown is valid. All standards are subject to revision and all parties should adopt the latest version of the following standards when possible. GT 9061—1988
JD.T9872—1999
JD/T 9874—:999
E/T 98771999
JB/T 9900.11999
3—Request
General technical parts for metal boring machine tools
Metal boring machine tool mechanical parts General technical parts for metal boring machine tool assembly parts Technical conditions for metal boring machine tool assembly parts
Metal boring machine tool cleanliness source
Horizontal boring machine head maintenance inspection
When accepting the machine according to this standard, it is necessary to inspect the other acceptance items in the technical standards such as G90611R/T%72: JR1974, [RT98 and other standards: 4 Model: Name and size
4.! The newly designed horizontal precision machine head should generally meet the requirements of this chapter: 4.2 The main parameter of the new horizontal machine head is the inner diameter of the front auxiliary bearing. The inner diameter size of the front bearing is: 10mm, 60mm, 80mm, (om, 120mm, expressed as 1/10 in the model
4.3 The model guide of the horizontal misalignment bed head is as follows: F
The above number (expressed in soil parameters)
Structural characteristic code 5
Overhead line number
The characteristic code and meaning of the horizontal precision bed compensation head are shown in Table 1. National Machinery Industry Kitchen 1999-05-20 approved 2000-01-01 sales standard
Conclusion The dimensions of the bearing and the shaft connected to the machine tool should meet the requirements of Figure 1 and Table 2: Figure 1 Accessories and tools MEO-6JI Boring head should be provided with the following parts and tools. M16 special T-shaped tool: M162 operation: use the tool for 6 machining quality. I seam rail
M12-6H
dynamic compensation pipe
6.1.! The degree of the compensating shaft for the rotational vibration is: when the stop bearing is used, it shall not be less than 58HRC: when the rolling shaft is used, it shall not be less than 4BHRC-
6.1.2 The hardness of the plane at the end of the misaligned shaft shall not exceed 48HKC6.1.3 In addition to reaching the specified accuracy, the embossing of the auxiliary bearing can be achieved on the upper and lower ends of the nut, and the runout shall not exceed 0.0mm. 6.2 Box rest
6.2.1 The bottom surface of the box body needs to be fixed according to the special weight and needs to be tested by water JB/T 500.2[959
6.3.2 The two sides of the housing are used as the measurement base: the grinding is used for the color test, and the scraping points should be even. On each 25mm×25mm surface and inside, the number of contact points should be at least 12 points, and the depth of the grinding points should not be less than 3. 6.2.3 The housing is an important casting and needs to be semi-finished before the second finishing treatment. 7 Assembly quality
7.1 Boring head
7.1.1 Before assembling the boring head and selecting the rolling bearing, the matching parts should be marked, and the marked parts should be outward for observation; before the bearing is matched, the matching parts should also be weighed and marked, and the marked parts should be outward for full inspection: 7.1.2 Use matching load test to adjust the rolling bearing When the shaft load of the bearing changes, the required rotation speed of the main shaft is reduced. 7.2 Bearing
7.2.! When installing the bearing, you should use the appropriate assembly method, do not damage the bearing, do not hit the movement, 7.2.2 Bearing assembly: The general head should be assembled with heating, and it is not allowed to heat directly with fire: the cooling rate is generally used. 7.2.3 After the bearing is installed, the contact between the shaft and the weak or outer periphery should be uniform, the shaft should be fully tightened, and the looseness should be uniform (the force limit plate can be used for fastening): the inner part must be tightly attached to the shoulder or fixed ring after assembly. 7.3 In total, 3.1 is used to press the head to install the correct head, and its temperature ratio meets the requirements of the above requirements. After the static is established, the movement is light and flexible. 7.3.2 During the whole assembly process, no dirt is allowed to enter the chain axle box, and the zinc axle box is kept clean and free of dirt. Appearance quality
1 The misalignment between the joint surface of the cover and the box body shall not exceed 0.5mm8.2 The wall thickness between the inner lead card surface and the finished part convex wall shall be uniform, and the difference between the flange wall and the outer flange wall shall not exceed 20% of the actual wall thickness. 8.3 The end surface of the chain shall not have scratches8.4 All surfaces of the cold-worked parts shall be flat and not curved, and all edges shall also be flat9 Wide operation test
The chain head and the test device shall be connected to the idle rotation test9! The idle operation of the boring head shall not be less than 2h. When the boring shaft reaches a stable temperature, check the temperature near the boring shaft.
a) The temperature of the rolling shaft shall not exceed 65%, and the temperature rise shall not exceed 35b. The temperature of the temperature-controlled boring head shall not exceed the temperature! S, 9.2 The idling time of the static pressure head shall not be less than 2h: after the oil temperature reaches the hot level, the oil temperature shall not exceed 30℃,
3 The static pressure head can only be started after the static pressure is guaranteed to be stable. When the sound pressure exceeds the specified value, safety should be guaranteed. .4 Measure the sound pressure level of the head under the condition of idling: the sound pressure level shall not exceed 75 (A: the sound pressure level shall not exceed 80dBA. , 5 After the head is running to the stable speed, the no-load frequency shall not exceed the design requirements. 9.6 The head shall be tested with a small load.
10 Precision inspection
10.1 Precision inspection shall be carried out in accordance with the provisions of JBT99001: 10
JB/r9900.2-1999 Www.bzxZ.net
10.2 The thermal deformation of the head must be guaranteed to be 1R/T9 mD.1-1999 No. 4, G4 and G5 have normal temperature and air-conditioning to reach the stable temperature and are qualified
10.3 The surface roughness R of the mirror hole, the maximum allowable value is: the slight grade is not less than 0.80μm, the smooth grade is not more than 1.60μm, label, packaging
11.1 The product label is fixed on the surface of the head, and the private label is in accordance with the relevant regulations I1.2 The head sent to the user, each contract is randomly packaged with a technical document, if it exceeds this regulation, it will be temporarily stipulated,
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