JB/T 1464.2-1999 Technical requirements for single-spindle longitudinal cutting automatic lathes
Some standard content:
ICS25.080.10
Machinery Industry Standard of the People's Republic of China
JB/T1464.2—1999
Technical Conditions for Single-spindle Slitting Automatic Lathes
Published on 1999-10-08
National Bureau of Machinery Industry
Implementation on 2000-03-01
JB/T1464.2-1999
This standard is based on the single-spindle The structural characteristics of the longitudinal automatic lathe are based on meeting the user's use requirements and summarizing the production practice experience. This standard is a concretization and supplement of the standards such as GB9061-1988 "General Technical Conditions for Metal Cutting Machine Tools", BT9872-1999 (General Technical Conditions for Mechanical Processing Parts of Metal Cutting Machine Tools) and JB/T9874-1999 "General Technical Conditions for Assembly of Metal Cutting Machine Tools". This standard is the concretization and supplement of JB/T1464 "Single-axis Longitudinal Automatic Lathe". This series of standards includes the following three parts: JB/T1464—1994 Accuracy of single-axis longitudinal cutting automatic lathe JB/T1464.1—1999
9 Single-axis longitudinal cutting automatic lathe
Parameters:
JB/T1464.2—1999 Technical conditions for single-axis longitudinal cutting automatic lathe. This standard is proposed by the National Technical Committee for Metal Cutting Machine Tools Standardization. This standard is under the jurisdiction of Chengdu Instrument and Machine Tool Research Institute. The responsible drafting unit of this standard: Ningjiang Machine Tool Factory. The main drafters of this standard: Qian Wenming, Wang Guikang, Guo Yuechang, Wang Hui. 1 Scope
Machinery Industry Standards of the People's Republic of China
Single-axis longitudinal cutting automatic lathe
Technical conditions
This standard specifies the requirements for the manufacture and acceptance of single-axis longitudinal cutting automatic lathes. This standard is applicable to single-axis longitudinal cutting automatic lathes with a maximum bar diameter of 32mm. Reference standards
JB/T 1464.2-1999
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 5226.1—1996
GB/T 9061—1988
GB/T9239—1988
GB 15760—1995
GB/T 16769—1997
JB/T1464—1994
JB/T 9872—1999
JB/T 9874—1999
JB/T 9877—1999
3 General requirements
Industrial machinery and electrical equipment Part 1: General technical conditions General technical conditions for metal cutting machine tools
Rigid rotor balancing quality Determination of allowable imbalance General technical conditions for safety protection of metal cutting machine tools Method of measuring noise sound pressure level
Metal cutting machine tools
Precision of single-axis longitudinal head automatic lathes
Metal cutting machine tools
Metal cutting machine tools
Metal cutting machine tools
General technical conditions for machined parts
General technical conditions for assembly
Determination of cleanliness
When accepting machine tools according to this standard, the remaining relevant acceptance items in standards such as GB/T9061, JB/T9872 and JB/T9874 that have not been specified in this standard should be inspected at the same time. 4 Accessories and tools
4.1 The following accessories and tools shall be supplied randomly: a) Spring chuck, maximum size one piece;
b) Center stand sleeve, maximum size one piece; c) Cam curve template, one set;
d) Adjustment tools, one set;
e) Washer, one set.
4.2 The following special accessories may be supplied according to agreement: a) Single-axis drilling attachment;
b) Single-axis threading attachment;
c) Three-axis drilling and threading attachment;
d) Other attachments.
Approved by the State Bureau of Machinery Industry on October 8, 1999, and implemented on March 1, 2000
5 Safety and Health
5.1 General Requirements
JB/T1464.2—1999
a) All potential risk factors should be eliminated or reduced as much as possible through design; b) For risks that cannot be eliminated, necessary protective measures should be taken or safety protection devices should be installed: c) For certain risks that are not easy to protect, they should be explained in the instruction manual, and warning signs should be installed near the dangerous parts when necessary.
5.2 The performance of the machine tool safety protection device should be reliable, the fixation should be firm, and the operation, adjustment and maintenance of the machine tool should not be restricted too much. 5.3 Parts and components on the machine tool that may come loose should be equipped with anti-loosening devices. The accessories of the rotating center frame should have reliable anti-loosening measures. 5.4 The stop of the tool feed system or the distribution shaft transmission should not be later than the stop of the main motion, and a "first stop" protection device should be provided. 5.5 The rotation direction of the horizontal axis handle should be counterclockwise, and the arrow of the rotation direction should be marked at the appropriate position. 5.6 The machine tool should be equipped with an overload safety device, which should be safe and reliable. The adjustment limit value of the safety device should be specified in the instruction manual.
5.7 A safety device should be set to stop the machine tool when the main transmission flat belt suddenly breaks. 5.8 The feeding device should be stable, firm, safe and reliable. The long groove width of the material tube should be less than the diameter of the processed bar material, and there should be no material jamming.
For machine tools with a maximum bar material diameter greater than or equal to 16mm, the feeding device should take vibration and noise reduction measures. 5.9 The machine tool noise should be tested according to GB/T16769. The sound pressure level of the machine tool noise should not exceed 83dB (A). The machine tool noise measurement should be carried out under the conditions of idling at low, medium and high speeds. When measuring, a full set of cams for idling test (which can be replaced by cams for fine cutting), pulleys and exchange gears should be installed. Each mechanism controlled by the cam performs the cutting action, but does not perform cutting. The noise should be measured with the bar stock when running at high speed. The bar stock should be a straightened, non-bending, high-precision, polished, easy-to-cut steel bar stock with a length of not less than 2 m. The bar stock diameter is calculated according to formula (1): d_1000
n nmax
Where: d--bar stock diameter, mm;
u Maximum cutting speed for machine tool calculation, m/min (recommended 100m/min); nmax--maximum spindle speed of the machine tool, r/min. (1)
5.10 The handle for rotating the distribution shaft should be flexible to push in and pull out, and the positioning should be reliable. The operating force during rotation should not exceed 60N, and the operating force when clamping and releasing the spring chuck should be in accordance with the design requirements. 5.11 The insulation resistance test, withstand voltage test, etc. of the machine tool and the safety requirements of the electrical system of the machine tool should comply with the provisions of GB/T5226.1. 6 Processing and assembly quality
6.1 The bed, spindle box, vertical tool rest and balance tool rest are important castings and should be aged after rough processing. 6.2 The bed guide pair is an important guide pair and wear-resistant measures such as wear-resistant cast iron, steel-inlaid guides, plastic-coated guides, rolling guides and induction quenching should be adopted.
6.3 The main parts that are easy to wear, such as the spindle, distribution shaft, push sleeve for spring chuck, taper sleeve for center frame chuck and important gears, should adopt wear-resistant measures that are suitable for their life.
6.4 The following joint surfaces should be evaluated according to the requirements of "particularly important fixed joint surfaces": a) Joint surface between vertical tool rest and bed;
b) Joint surface between bed and base:
c) Joint surface between accessory seat and base.
JB/T 1464.2—1999
6.5 The following guide rails shall be assessed according to the requirements of “static pressure, sliding (rolling) guide rails”: a) guide rails of the spindle box and the bed;
b) guide rails of each tool holder;
c) sliding surfaces of the balance tool holder body and the vertical tool holder body. 6.6 The surfaces of the two small tool seats of the balance tool holder shall be assessed according to the requirements of “displacement guide rails”. 6.7 The radial and axial adjustment devices of each tool holder shall move flexibly without any blocking phenomenon, and the reverse idle travel of each adjustment knob shall not exceed 1/10r. For tool holders with fine-tuning mechanisms, the reverse idle travel of the knobs shall comply with the design requirements. 6.8
The high-speed rotating spindle assembly shall be subjected to balance test and correction after assembly, and the balance quality level shall comply with the allowable imbalance (i.e. eccentricity) in GB 9239. It shall be calculated according to formula (2): eper=6.3
The allowable residual unbalance (i.e., weight-diameter product) is calculated according to formula (3): μ=meper
Wherein: eper
Allowable unbalance, μm:
Allowable residual unbalance, g: mm;
Mass of rotating body, kg:
Speed of rotating body, rmin.
6×10*
6×104
When the maximum rotation speed 7max is greater than or equal to 8000r/min, dynamic balancing test and correction should be carried out; when nmxc is less than 8000r/min, static balancing test and correction are allowed.
6.9Inspect cleanliness according to the provisions of JB/T9877, among which the internal cleanliness of the spindle box and other parts shall be inspected by weight method, and its impurities and dirt shall not exceed the provisions of Table 1 (spot check, in batch production, 5% spot check, but not less than one). Table 1
Inspection location
Spindle box
Distribution shaft
Gearbox
Maximum bar diameter
6.10 The following important locating pins shall be inspected by color coating method, and their contact length shall not be less than 60% of the working length: a) Locating pins between vertical tool rest and bed:
b) Locating pins between bed and base;
c) Locating pins between accessory seat and base;
d) Locating pins of rear bracket supporting distribution shaft. 7 Machine tool idle operation test
7.1 Temperature rise test
JB/T1464.2—1999
Operate the machine tool according to the requirements of GB/T9061, so that the spindle bearing reaches a stable temperature, and inspect the temperature and temperature rise of the spindle bearing near the bearing. The value shall not exceed the provisions of Table 2. Table 2
Bearing type
Rolling bearing
Sliding bearing
7.2 Inspection (spot check) of main motion and feed motion Temperature
The actual deviation range of the main shaft speed and distribution shaft speed at each level is -10%~+10% of the nominal value. 7.3 Idle power test (spot check)
The idle power of the whole machine transmission system should not exceed 60% of the main motor power 7.4 Action test
7.4.1 Start, stop and brake the spindle at medium speed for 10 times each. The action should be flexible and reliable. ℃
7.4.2 Start and stop each moving part at medium feed speed for 10 times each. The action should be flexible and reliable. 3 When the spindle box moves, it should be stable and light without blocking and creeping. The starting force should meet the design requirements. 7.4.3
If the feeding motion has rapid movement, a rapid movement test should be conducted, and the movement should be flexible and reliable. Carry out the materialless parking test 10 times continuously, and the action should be reliable. Carry out the clamping and loosening test of the spindle spring chuck 10 times continuously, and the action should be reliable. 7.4.6
5 Continuous idle running test of the whole machine
Carry out the continuous idle running test of the whole machine under the main function, and the continuous idle running time shall not be less than 4h. The machine tool runs idle at medium speed. During operation, a full set of cams for idle running test (which can be replaced by cams for fine cutting), pulleys and gears should be installed. When abnormal phenomena or faults occur during the test, the test should be repeated after the cause is found out and adjusted or eliminated. 8 Machine tool load test (spot check)
8.1 This series of machine tools should be tested for maximum cutting depth by turning the outer circle. The test shall meet the following conditions:
a) Test piece material: 45 steel;
b) Test piece bar size: maximum bar diameter; c) Cutting length: not less than 1/3 of the maximum turning length; d) Number of cut pieces: 3 pieces.
The cutting amount and the material and geometric parameters of the tool shall be specified by the manufacturer. When conducting the maximum cutting depth test, the machine tool should work normally, and each motion mechanism should be flexible and reliable. 8.2
Machine tool precision inspection
Precision inspection shall be in accordance with JB/T1464.
JB/T1464.2—1999
JB/T1464-1994 The parallelism of the G5 spindle box movement to the spindle rotation axis, the coincidence of the G12 center frame guide hole axis to the spindle rotation axis, and the parallelism of the G13 spindle box movement to the center frame guide hole axis in the three items should be tested when the machine tool reaches the medium speed stable temperature. The test specifications for the working accuracy test shall be in accordance with the design requirements 9.3
9.4 During the working accuracy test, the maximum allowable value of the surface roughness R of the test piece after machining (within the range of H) is 1.6μm. 9.5 The feed accuracy of each tool holder radial and axial adjustment device shall not exceed the provisions of Table 3 1. During the test, take the scale value of 1 grid each time and the scale value of 5 grids each time, respectively, and continuously advance and retreat five times, and calculate the feed accuracy according to formula (4). The error is calculated as the maximum calculated value among 20 times.
Where: a-feed scale value for each time, mm; actual movement amount for each feed, mm.
Inspection items
Radial feed accuracy
Axial feed accuracy
Balance tool rest
When changing the direction of advance and retreat, the gap between the nut and the screw should be eliminated. For tool rests with fine adjustment mechanisms, the feed accuracy shall be in accordance with the design requirements. 1) Inspection is allowed during assembly.
Tool rest
Mechanical industry standard
Technical conditions for single-axis longitudinal cutting automatic lathebzxz.net
JB/T1464.2-1999
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, zip code 100044)*
Word count 12,000
1/16 Printing sheet 12
Format 880×1230
First edition in February 2000
First printing in February 2000
Print run 1-500
Price 10.00 yuan
No. 99-1354
Mechanical industry standard service website: http:/JB.ac.cn6661This series of machine tools shall be tested for maximum cutting depth by turning the outer circle. The test shall meet the following conditions:
a) Test piece material: 45 steel;
b) Test piece bar size: maximum bar diameter;c) Cutting length: not less than 1/3 of the maximum turning length;d) Number of cut pieces: 3 pieces.
The cutting amount and the material and geometric parameters of the tool shall be specified by the manufacturer. During the maximum cutting depth test, the machine tool shall work normally, and each motion mechanism shall be flexible and reliable. 8.2
Machine tool precision inspection
Precision inspection shall be in accordance with JB/T1464.
JB/T1464.2—1999
JB/T1464-1994 The parallelism of the G5 spindle box movement to the spindle rotation axis, the coincidence of the G12 center frame guide hole axis to the spindle rotation axis, and the parallelism of the G13 spindle box movement to the center frame guide hole axis in the three items should be tested when the machine tool reaches the medium speed stable temperature. The test specifications for the working accuracy test shall be in accordance with the design requirements 9.3
9.4 During the working accuracy test, the maximum allowable value of the surface roughness R of the test piece after machining (within the range of H) is 1.6μm. 9.5 The feed accuracy of each tool holder radial and axial adjustment device shall not exceed the provisions of Table 3 1. During the test, take the scale value of 1 grid each time and the scale value of 5 grids each time, respectively, and continuously advance and retreat five times, and calculate the feed accuracy according to formula (4). The error is calculated as the maximum calculated value among 20 times.
Where: a-feed scale value for each time, mm; actual movement amount for each feed, mm.
Inspection items
Radial feed accuracy
Axial feed accuracy
Balance tool rest
When changing the direction of advance and retreat, the gap between the nut and the screw should be eliminated. For tool rests with fine adjustment mechanisms, the feed accuracy shall be in accordance with the design requirements. 1) Inspection is allowed during assembly.
Tool rest
Mechanical industry standard
Technical conditions for single-axis longitudinal cutting automatic lathe
JB/T1464.2-1999
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, zip code 100044)*
Word count 12,000
1/16 Printing sheet 12
Format 880×1230
First edition in February 2000
First printing in February 2000
Print run 1-500
Price 10.00 yuan
No. 99-1354
Mechanical industry standard service website: http:/JB.ac.cn6661This series of machine tools shall be tested for maximum cutting depth by turning the outer circle. The test shall meet the following conditions:
a) Test piece material: 45 steel;
b) Test piece bar size: maximum bar diameter;c) Cutting length: not less than 1/3 of the maximum turning length;d) Number of cut pieces: 3 pieces.
The cutting amount and the material and geometric parameters of the tool shall be specified by the manufacturer. During the maximum cutting depth test, the machine tool shall work normally, and each motion mechanism shall be flexible and reliable. 8.2
Machine tool precision inspection
Precision inspection shall be in accordance with JB/T1464.
JB/T1464.2—1999
JB/T1464-1994 The parallelism of the G5 spindle box movement to the spindle rotation axis, the coincidence of the G12 center frame guide hole axis to the spindle rotation axis, and the parallelism of the G13 spindle box movement to the center frame guide hole axis in the three items should be tested when the machine tool reaches the medium speed stable temperature. The test specifications for the working accuracy test shall be in accordance with the design requirements 9.3
9.4 During the working accuracy test, the maximum allowable value of the surface roughness R of the test piece after machining (within the range of H) is 1.6μm. 9.5 The feed accuracy of each tool holder radial and axial adjustment device shall not exceed the provisions of Table 3 1. During the test, take the scale value of 1 grid each time and the scale value of 5 grids each time, respectively, and continuously advance and retreat five times, and calculate the feed accuracy according to formula (4). The error is calculated as the maximum calculated value among 20 times.
Where: a-feed scale value for each time, mm; actual movement amount for each feed, mm.
Inspection items
Radial feed accuracy
Axial feed accuracy
Balance tool rest
When changing the direction of advance and retreat, the gap between the nut and the screw should be eliminated. For tool rests with fine adjustment mechanisms, the feed accuracy shall be in accordance with the design requirements. 1) Inspection is allowed during assembly.
Tool rest
Mechanical industry standard
Technical conditions for single-axis longitudinal cutting automatic lathe
JB/T1464.2-1999
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing, zip code 100044)*
Word count 12,000
1/16 Printing sheet 12
Format 880×1230
First edition in February 2000
First printing in February 2000
Print run 1-500
Price 10.00 yuan
No. 99-1354
Mechanical industry standard service website: http:/JB.ac.cn666
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.