JB/T 9927.2-1999 This standard is a revision of ZBn J54 012-88 "Technical requirements for manufacturing and acceptance of short thread milling machines". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard is part of the JB/T 9927 "Short thread milling machine" series of standards, which includes the following two parts: JB/T 9927.1-1999 Accuracy inspection of short thread milling machines JB/T 9927.2-1999 Technical conditions for short thread milling machines This standard specifies the manufacturing and acceptance requirements for short thread milling machines. This standard is applicable to short thread milling machines with a maximum milling diameter of 200mm, a maximum milling length of 80mm, and a maximum workpiece length of 2500mm, which use the comb milling method to process ordinary threads. This standard was first issued in April 1988. JB/T 9927.2-1999 Technical Specifications for Short Thread Milling Machines JB/T9927.2-1999 Standard download decompression password: www.bzxz.net

ICS 25.080.99
Machinery Industry Standard of the People's Republic of China
JB/T9927.1~9927.2—1999
Short thread milling machine
1999-05-20 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JB/T9927.2-1999
This standard is a revision of 2J54012, i.e., Technical Requirements for the Construction and Acceptance of Milling Machines. During the revision, the relevant provisions were comprehensively revised, but the technical content remained unchanged. This standard is part of the /T9927 "Short Thread Milling Machine" series of standards, which includes the following two parts: JB/T9927.1-1999 Short Thread Milling Machine Inspection and Testing JB/T9927.2-1999 Technical Conditions for Short Thread Milling Machines This standard replaces 2BnJ5401288 from the date of implementation. The National Metallurgical Machine Tool Standardization Technical Committee issued this standard based on the National Metallurgical Machine Tool Standardization Technical Committee's cylindrical gear machine technology. This standard was drafted by: Jihai Second Machine Tool! 'This standard was first issued in April 1988.
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Short Thread Milling Machines
The standard specifies the requirements for the manufacture and acceptance of short thread milling machines JB/T 9927.2—1990
Generation [5401288
This standard is applicable to short thread milling machines with a maximum cutting depth of up to 20mm, a maximum cutting length of up to x%mm, and a maximum T-piece length of up to 250mm. 2 Cited standards
The provisions contained in the following standards are incorporated into the provisions of this standard by citing them in the supplementary text. When this standard is published, all versions are valid: All versions are included. Parties applying this standard should explore the possibility of using the latest versions of the following standards. GB/T9061—1988
JB/T9872—1999
JB/T98?4--1999
JB.T98771999
JB/7'9927.1—1995
—General requirements
General technical system for cutting machine tools
Technical conditions for power-on of machine plate processing parts of cutting machine tools General technical conditions for assembly of cutting machine tools
Determination of slip of cutting machine tools
Inspection of short thread mirror
When accepting and analyzing the bed according to this standard, the remaining acceptance items in GB/T9061, JB/T9872, JB/T9874 and other standards that have not been concretized in the other standards must be inspected at the same time. bZxz.net
4 Accessories and tools
The accessories and tools listed in Table 1 and 1 shall be supplied randomly. Among them,
E oil
card plate
special hand
Generation: The accessories and tools supplied randomly by the product are the accessories and tools supplied randomly by the product. The accessories and tools supplied randomly by the product are the accessories and tools supplied randomly by the product. The accessories and tools supplied randomly by the product are the accessories and tools supplied randomly by the product. The accessories and tools supplied randomly by the product are the accessories and tools supplied randomly by the product. The accessories and tools supplied randomly by the product are the accessories and tools supplied randomly by the product. The accessories and tools supplied randomly by the product are the accessories and tools supplied randomly by the product. Implementation
5 Processing and assembly quality
JB/T9927.2—1999
5.1 The bed guide is an important guide brush, and the grinding and elimination measures should be adopted (such as resistant casting or ultrasonic induction fire, high (medium) frequency induction water, etc.
.2 The main drawer, tool spindle, etc. of the lower part should be ground before deep attack. 5.3 The bed, bed head box, head box rest, slide, seat, material cylinder, etc. are important parts, and they should be effectively treated after adding 1. 5.4 The surface of the bed guide and the matching surface of the hydraulic cylinder body and the ram shall be assessed according to the requirements of "sliding guide".
5.5 The following matching guide rails shall be assessed according to the requirements of "relocation guide":) The longitudinal direction of the bed a) The matching surface of the guide rail and the seat: b) The matching surface of the radial feed guide shaft and its axis: The matching surface of the tool holder and the shaft sliding bearing. 5.6 The joint surface between the headstock pin body and the end body shall be assessed according to the requirements of "special important fixed joint surface". 5.? The following joint surfaces shall be assessed according to the requirements of "important fixed joint surface":, the joint surface between the barrel support and the bed:
b) The joint surface between the movable rod bracket and the bed:
Center) The joint surface between the radial feed cylinder and its fixed joint. 5.8 The reverse idle stroke of the radial feed handwheel should not be greater than 14r5.9 The radial feed handwheel and handle of the machine tool shall be assessed according to the "non-use" requirements of ordinary machine tools. 5.10 Inspection and repair shall be carried out in accordance with the provisions of J9/T9877, including the headstock box and milling machine. The internal cleanliness of the head parts is sampled and inspected by weight. The pressure and material content of the headstock should not exceed 6500mg, and the chain head should not exceed 2000mg. 6 Machine tool idle operation test
6 Temperature rise test
The main motion mechanism of the machine tool is operated at low, medium and high speeds. The high-speed operation time should be less than 11 seconds, so that the tool bearing reaches a stable temperature. The temperature and temperature rise are measured near the spindle auxiliary bearing. The temperature should not exceed 60%, and the gain should not exceed 30%. 6.2 Small spindle movement inspection
The actual deviation of the chain knife half-turn should not exceed ±5% of the value indicated on the label. 6.3 Action test
63, 1 speed to stop the tool recording spindle in this direction and start it continuously. Stop for 10 minutes for testing. The action should be flexible and friendly. 6.3.2 Check the flexibility of starting, stopping and cyclic action of feed motion: 1. The reliability of reverse conversion action and tightening mechanism. 6.4 Idle operation rate test
The idling power of main transmission system (excluding no-load power of main motor) shall not exceed the design requirements. 6.5 Continuous idling test of whole machine
Carry out continuous idling test of whole machine under full kinetic energy. The continuous idling time without reason shall not be less than 8h. Machine tool load test
This series of machine tools adopts the method of cutting to carry out the main transmission system of the machine tool to achieve the average rate test. The quantity and cutting conditions shall be in accordance with the design documents or specified machine tool precision inspection.1B/T 9927.2—1999
8.1 The precision inspection of machine tools shall be carried out in accordance with JB/[9927.1. 8.2G12.G13, (15, 10 items of inspection are completed. When the machine tool reaches the stable temperature at the speed, 8.31. When the precision test is carried out, the maximum allowable value of the roughness R is 3.2m. 8.4. Inspection of the re-positioning precision of the head feeding should comply with the provisions of Table 2. 2
Inspection runner
Xie Yi chooses the sub-hydrogen positioning precision plate
9 Others
Give light tools
Indicator
Inspection method
Standard indicator on the missing parts of the bed, quickly touch the head of the selected head: fixed point, feed at least 7 times around the head diameter, the positioning error is calculated by the maximum difference of the next minus
The machine tool should be evaluated according to the provisions of the design document. mm
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