This standard specifies the requirements for the design, manufacture and acceptance of piston lathes. This standard is applicable to piston lathes with a processing diameter of 50mm~150mm and a hydrostatic spindle bearing structure. JB/T 8487.1-2002 Technical conditions for piston lathes JB/T8487.1-2002 Standard download decompression password: www.bzxz.net

ICS25.080.10
Machinery Industry Standard of the People's Republic of China
JB/T 8487.12002
Piston lathe
Technical conditions
Piston lathe-technicalconditions2002-07-16Published
2002-12-01Implementation
The State Economic and Trade Commission of the People's Republic of ChinaBefore publication
Regulatory reference documentApply
General requirements
Female parts and tools
Industrial assembly
Hui Lai military operation certification
Ring bed high power test
Precision pull.Www.bzxZ.net
JB/T 8457.1:-2002
JR/T8487.1—2002
This standard is the summary of the requirements and requirements of the standard, the standard of 721 general technical conditions for full-scale parts, the standard of 98 full-scale cutting assembly technology, and the standard of the standard of the machine industry. The responsible persons for this standard are: E Fuyao, 3 Xinghai, Zhang Liandi, and Gao Lianyuan. 1 Scope
Active lathe
Technical conditions
This standard specifies the requirements for the design, manufacture and acceptance of active lathes. This standard is applicable to the machining of pistons with a diameter of 0mm~150mm and a main bearing structure. Normative reference documents
JB/T8487.1—2002
The following documents have become clauses of this standard through normative reference. All reference documents with a specified date: their subsequent amendments (excluding errors) or revised versions are applicable to this standard. However, it is recommended that all parties that have reached an agreement on this standard read the latest version of this document. It is an unqualified reference document and the latest version is not applicable to the standard. GBT90G1-1988 Technical conditions for the use of metal cutting machines G15760-1995 General technical conditions for the full protection of metal cutting machines JBT8487 Inspection of machine tool accuracy JB/TG Inspection and evaluation of the color coating method for the drilling surface of metal cutting machines JB/T9877 Inspection and evaluation of the cleanliness of metal cutting machines by the color coating method When accepting the machine according to this standard, the GB9061-1988, JB/9872, JB/T974 standards shall be checked at the same time. The rest of the acceptance items shall be inspected in accordance with the integrated system.
4 Accessories and tools
To ensure the adequate performance of the machine tool, the accessories and tools listed in Table 1 shall be supplied randomly. Table 1
Product name
Special equipment
5 Safety and sanitation
The safety and maintenance requirements of the machine tool shall comply with the provisions of IEC 60008-15760-1995. 6 Processing and assembly
6.1 The bed, main box, and frame are important parts, which shall be subjected to heat aging or vibration aging after machining. 6.2 The machine tool's sliding rails, main shaft (two bearing journals, front taper holes) shall adopt wear-resistant measures. 6.3 The connection between the bed legs and the bed shall be in accordance with the requirements of "important fixed joint surfaces". 6.4 "The following joint surfaces shall be subject to the safety assessment of "particularly important fixed joint surfaces": a) the joint surface between the axle box and the bed:
JR/T8487.1-2002
b) the joint surface between the front and rear bodies,
the front tool holder and the main slide table:
d) the joint surface between the tailstock body and the bottom of the exhibition seat.
65 "The lower movable plate and the bed guide, the upper slide and the lower guide brush shall be subject to the "driven effect" requirement assessment 6.6 The tailstock guide and the body guide, and the bottom plate and the upper plate guide rail shall be subject to the "displacement" requirement assessment, 6.7 The main components (including: the chuck body, punch, pulley, pulley, etc.) shall be subjected to dynamic balance test, and the displacement shall not be greater than 1 at 3000r/min. After the gear is leveled, mark the rod alignment of each part and it should not be changed intentionally. After the pulley is adjusted, the auxiliary axis runout is not more than 0.2mm.
6.8 According to IBT9877 machine tool disinfection method, the internal cleanliness of the spindle box and hydraulic sleeve box is inspected by other methods. The amount of dirt and currency should not exceed the requirements in Table 2 (inspection): other parts are inspected by daily measurement and sensory method. There should be no objects in Table 2
Hao Xu Name
Freshness
Spindle box
6.9 The reverse idle stroke of the tool holder with a scale device should not exceed 1/30 of the total. 10 The main parts of the machine should be pre-installed before formal assembly. Unit: mg
Jiejiang Oil Tank
6.t1 The front and rear hydrostatic bearings are inserted into the spindle box for precision boring. The axis accuracy between the two holes and the accuracy of each hole are no more than 0.005mm, and the runout of the two ends of the front hole is no more than 0.0051u. 6.12 The front and rear flat hole precision key shops and the main shaft journal match.) Front bearing radial return 0.04-0.05mmb: front shaft or axial bearing o.0t.5mm:
c) Rear bearing radial spacing 0.035mm-0.04mm6.13 The oil supply of the main shaft static oil chamber should be between 0.8MPa and 1.2MPa: the radial and radial throttling ratios are 1:1.5~[:21:1.3~1:1.7 respectively. The pressure difference of each oil chamber should not be greater than 0.1M1a6.14 Apply a force of 200 on the main transmission system radially or axially respectively, and test the stiffness of the main transmission system. The stiffness should not be less than 10W/m6.15 The joint surface of the throttle plate and the semi-sprocket should be polished, and the oil inlet circle should be closed and not leaking. 5.16 The tension of the seat should be adjusted within the range of 4KIN--SUON 6.17 Adjust the transmission belt connection so that the transmission belt is not too tight. 6.1B The main shaft box and the end body positioning pins are tested by color method according to the provisions of JB9376. The contact length should not be less than 60% 7 Machine tool idle operation test
7.1 The main motion mechanism of the machine starts with the lowest speed and runs in sequence. The operation time of each level should not be less than 2min and the high-speed operation time should not be less than 2h. The spindle bearings are stopped to reach a stable temperature. The temperature and temperature rise of the bearings are measured near the spindle bearings. The value does not exceed the regulations.
Unit:
Light bearing service name
Spindle static positive bearing
7.2 Use a speed to continuously start and stop the main motion system of the machine tool 10 times to test the flexibility and reliability of the action. 7.3 The liquid ring system operates continuously at the rated working pressure. After the temperature reaches a stable temperature, check the temperature setting and temperature rise. The value should not exceed the provisions of Table 4.
System name
Liquid positive system
7.4 The actual deviation of the spindle rotation and feed amount should not exceed 5% of the value indicated on the nameplate. J13/T8487.12002
Unit:
7.5 Carry out the continuous idling test of the whole machine under all functions. The continuous idling without fault time should not be less than 10 hours8Machine tool high power test
Ying series machine tools do not carry out load test, only carry out the maximum power test of the machine tool system without design and charging: relevant test cases shall be carried out according to the design regulations
9Machine tool precision inspection
9.1 The machine tool's full-scale inspection shall be carried out once after the machine tool idling test and the machine tool working test, and the actual value of the last full-scale inspection shall be recorded in the certificate of qualification.
9.2 The two geometric accuracy inspections of GR and G14 in the machine tool precision inspection standard shall be carried out when the machine tool is in a stable rotation. 9.3 The test conditions of the working accuracy inspection in the machine tool precision inspection standard shall be implemented according to the relevant documents specified in the design. 9.4 When testing the working accuracy in the machine tool grade inspection standard, the maximum allowable value of the roughness of the test piece surface is 0.8m:
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