JB/T 2523.1-1997 This standard is a revision of JBn 3759-84 "Technical Requirements for the Manufacture and Acceptance of Floor-type Lathes". This standard specifies the requirements for the manufacture and acceptance of floor-type lathes. This standard applies to floor-type lathes for general use with a maximum workpiece rotation diameter of 2000~8000mm in the pit and a maximum workpiece length of 2000~4000mm between the centers. It also applies to floor-type lathes for general use without pits. JB/T 2523.1-1997 Technical Requirements for Floor-type Lathes JB/T2523.1-1997 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T2523.1-1997
Technical Conditions
Floor-type Lathe
1997-08-18 Issued
Ministry of Machinery Industry of the People's Republic of China
1998-01-01 Implementation
JB/T2523.1—1997
This standard is a revision of JBn375984 "Technical Requirements for Manufacturing and Acceptance of Floor-type Lathes". Its format and narrative method are in accordance with the provisions of GB/T1.1-1993 "Guidelines for Standardization Work Unit 1: Rules for Drafting and Presentation of Standards Part 1: Basic Provisions for Standard Writing" and JB/T54001.5-92 "Technical Conditions Standard for the Preparation of Metal Cutting Machine Tools". This standard is a concretization and supplement to GB9061-88 "General Technical Conditions for Metal Cutting Machine Tools" and other standards: JBn375984 will be invalidated from the date of implementation of this standard. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of Wuhan Heavy Machine Tool Research Institute. The drafting units of this standard: Qiqihar No. 1 Machine Tool Factory and Qinghai Heavy Machine Tool Factory. 1
1 Scope
Machinery Industry Standards of the People's Republic of China
Technical Conditions for Floor Lathes
This standard specifies the requirements for the manufacture and acceptance of floor lathes JB/T 2523.1-1997
This standard applies to floor lathes for general use with a maximum workpiece rotation diameter of 2000-8000mm in the pit and a maximum workpiece length of 2000~4000mm between the centers, and also applies to floor lathes for general use without pits. Cited standards
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 will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T5226.1——1996
GB 65761986
GB9061—1988
GB15760—1995
ZBJ50003—1988
ZB J50 0041988
ZBnJ50 008.1—1988
ZBnJ50008.2—1988
ZBnJ50008.31988
ZB J50 0161989
ZBJ53007—1988
3—General requirements
Electrical equipment of industrial machinery Part 1: General technical conditions Machine tool lubrication system
General technical conditions
Metal cutting machine tools
Metal cutting machine tools
General technical conditions for safety protection
Metal cutting machine tools
Determination of cleanliness
Metal cutting machine tools
Determination of noise sound pressure level
Metal cutting machine tools General technical conditions for machined parts Metal cutting machine tools
General technical conditions for welded parts
Metal cutting machine tools
General technical conditions for assembly
Metal cutting machine tools
General technical conditions for hydraulic systems
Accuracy of floor-standing lathes
When accepting machine tools according to this standard, the remaining acceptance items in GB9061, ZBnJ50008.1, ZBnJ50008.2, ZBnJ50008.3 and other standards that are not specified in this standard must be inspected at the same time. 4 Accessories and tools
4.1 The following accessories and tools should be supplied randomly: a) Special wrench, 1 set;
b) Adjustment shims, adjustment screw sleeves, anchor bolts, nuts, washers for installation, 1 set c) Lubricating oil gun, 1 piece.
4.2 The following special accessories and tools can be supplied according to the agreement: a) Center frame;
b) Profiling device:
c) Grinding device:
d) Inspection tools.
Approved by the Ministry of Machinery Industry on August 18, 1997
Implemented on January 1, 1998
5 Safety and Health
JB/T2523.11997
5.1 The slide should have a limit position safety device. 5.2 The saddle, horizontal slide, longitudinal slide and tool holder guide surface should have a protective scraper. 5.3 The spindle bearing should be equipped with an appropriate temperature measurement point. 5.4 Inspect the machine tool noise according to the provisions of ZBJ50004. The noise measurement of machine tools should be carried out under the conditions of low, medium and high speed of the main motion forward and reverse rotation and idling at medium speed of the feed motion. The sound pressure level of the whole machine noise shall not exceed 85dB (A). 5.5 The tool rest and longitudinal slide handles are frequently used handles, and their operating force should be uniform within the travel range and shall not exceed 120N; the slide handle and tailstock sleeve handwheel are assessed as uncommon handles, and their operating force shall not exceed 160N; the tailstock adjustment handle shall not exceed 200N.
5.6 When accepting machine tools according to this standard, the remaining acceptance items in GB15760 that are not specified in this standard, as well as the acceptance items specified in GB/T5226.1, GB6576 and ZBJ50016 and other standards must be inspected at the same time. 6 Processing and assembly quality
6.1 The spindle box, faceplate, base plate, bed, slide box, bed saddle, tailstock upper body, etc. are important castings, and aging treatment should be carried out after rough processing.
6.2 The main parts of the machine tool that are prone to wear, such as the sliding guide pair, spindle pair, screw pair, worm gear pair and high-speed heavy-load gear pair, should adopt wear-resistant measures that are suitable for their service life.
6.3 The guide pair between the saddle and the bed, the guide pair between the horizontal slide and the saddle, and the guide pair between the longitudinal slide and the rotary slide are important guide pairs, and wear-resistant cast iron, steel-inlaid guides, plastic-coated guides or high (medium) frequency induction quenching and other wear-resistant measures should be adopted. 6.4 The following joint surfaces shall be assessed according to the requirements of "important fixed joint surfaces": a) the joint surface between the spindle box and the base;
b) the joint surface of the spliced ​​base plate;
c) the joint surface between the bed and the base plate and the positioning block (pin); d) the joint surface between the upper and lower bodies of the tailstock;
e) the joint surface between the lower body of the tailstock and the base plate; the joint surface between the bed saddle and the slide box;
g) the joint surface between the spindle end face and the faceplate;
h) the joint surface between the rack, gear ring and the base. Important fixed joint surfaces shall be tightly combined. After tightening, they shall not be inserted when inspected with a 0.04mm feeler gauge, but the insertion depth of the local (23 places) shall not exceed 20mm. The length of the inserted part is less than or equal to 15 of the length of the joint surface, but not more than 100mm, which is counted as one place. 6.5 The joint surface between the rotary slide and the cross slide shall be assessed according to the requirements of "particularly important fixed joint surfaces". 6.6 The guide rails of the bed saddle and bed platform, the horizontal slide and bed saddle, the longitudinal slide and the rotary slide, the longitudinal slide and the tool holder should be evaluated according to the requirements of "static pressure, sliding (rolling) guide rails".
6.7 The reverse idle stroke of the handwheel and handle with a scale device should not exceed the provisions of Table 1Table 1
Handle part
Reverse idle stroke
Longitudinal slide, tool holder
6.8 The faceplate must be subjected to static balance test and calibration. 6.9 Cleanliness shall be inspected according to the provisions of ZBJ50003. JB/T2523.11997
6.9.1 The internal cleanliness of the spindle box and the slide box shall be inspected by weight method, and its impurities and dirt shall not exceed 400mg/L (spot check). 6.9.2 The cleanliness of the hydraulic system oil shall be inspected by weight method, and its impurities and dirt shall not exceed 200mg/L (spot check). 6.9.3 Other parts shall be inspected by visual inspection and hand feel, and there shall be no dirt. 6.10 The following important locating pins shall be inspected by color coating, and their contact length shall not be less than 60% of the working length a) Locating pins between the spindle box and the base;
b) Locating pins for the splicing of the base plate:
) Locating pins between the saddle and the slide box;
d) Locating pins between the front and rear bearings of the spindle and the box. 7 Machine tool idle operation test
7.1 The main motion mechanism of the machine tool shall be operated in sequence from the lowest speed, and the operation time of each speed level shall not be less than 2 minutes. The machine tool with stepless speed regulation can be operated at low, medium and high speeds. The high-speed operation time shall not be less than 1 hour to allow the spindle bearing to reach a stable temperature. Measure the temperature and temperature rise of the bearing near the spindle bearing, and the value shall not exceed the provisions of Table 2. Table 2
Bearing type
Sliding bearing
Rolling bearing
7.2 The feeding mechanism shall be tested for idle running at low, medium and high feeding speeds, which can be carried out simultaneously with the main motion test. The test time for each gear shall not be less than 2 minutes. Www.bzxZ.net
7.3 The fast moving mechanism shall be tested for forward and reverse fast moving. The number of reciprocating times of the slide box, horizontal slide and vertical slide shall not be less than three times, and the stroke shall not be less than half of the full stroke. 7.4 The actual deviation of the spindle speed and feed rate of each level of the step transmission should be within the range of -2%~+6% of the indicated value on the label: The actual deviation of the spindle speed and feed rate of the stepless speed transmission should not exceed 10% of the indicated value on the label 7.5 Use an appropriate speed to start and stop the main motion and feed motion in the forward and reverse directions for five times to test the flexibility and reliability of the action.
7.6 The idling power of the main transmission system shall be assessed according to the design regulations 8 Machine tool load test
This series of machine tools shall be subject to the following load tests. When the manufacturer does not have the test conditions, it can be carried out in the user's factory with the consent of the user. a) Machine tool operation test with maximum weight of workpiece (spot check); b) Maximum torque test of the main transmission system of the machine tool: c) Maximum cutting resistance test of the machine tool;
d) Test of the main transmission system of the machine tool reaching maximum power (spot check); e) Test of the main transmission system of the machine tool exceeding the maximum torque by 25% for a short time (spot check); f Test of the machine tool exceeding the maximum cutting resistance by 25% for a short time (spot check). 3
JB/T2523.1-1997
8.1 The machine tool is tested for operation with the maximum weight of the workpiece. It is operated at a low speed and the speed specified in the design. The operation time should not be less than 30 minutes to check the stability and reliability of the machine tool operation. 8.2 The maximum torque, maximum cutting resistance and maximum power test of the main transmission system of the machine tool. The test piece materials, cutting specifications, etc. shall be in accordance with the design documents.
Note: Maximum power refers to the design power.
8.3 The main transmission system of the machine tool is tested for a short time exceeding the maximum torque and maximum cutting resistance specified in the design by 25%. The test time is not less than 1 minute. For machine tools larger than 3150mm, only the maximum torque and maximum cutting resistance tests are performed. 8.4 The slide box equipped with a feed overload protection device should be safe and reliable during the load test. When the longitudinal feed resistance reaches 125% of the maximum cutting resistance, it should be able to work normally in a short time. When it exceeds 125%, it should stop working. Note: After the overload test, the overload protection device should generally be adjusted back to the full load position. Machine tool accuracy inspection
Machine tool accuracy inspection shall be carried out in accordance with the provisions of ZBJ53007. 9.1
Item G7 in the accuracy inspection shall be inspected when the machine tool reaches the medium speed stable temperature 9.3
The test specifications for the working accuracy inspection shall be carried out in accordance with the provisions of the design documents. 9.4 The maximum allowable value of the surface roughness R of the test piece during the working accuracy inspection is 3.2μm. 4
Republic
Mechanical Industry Standard
Technical Conditions for Floor Lathes
JB/T2523.1-1997
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing: Postal Code 100044)*
Format 880×1230
Print Sheet 1/2
Word Count 10000
First Printing in October 1997
First Edition in October 1997
Print Quantity 1-500
Price 500 Yuan
97-215
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cn66
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