JB/T 4367.2-1999 JB/T 4367.2-1999 Technical conditions for floor-standing milling and boring machines JB/T4367.2-1999 Standard download and decompression password: www.bzxz.net

ICS25.080.20
J54
JB
Machinery Industry Standard of the People's Republic of China
JB/T4367.2—1999
Floor-standing milling and boring machine||tt| |Released on 1999-05-20
Technical conditions
Implemented on 2000-01-01
National Machinery Industry Bureau
Released
JB/T4367.2 -1999
Foreword
This standard is a revision of ZBnJ54024-89 "Technical Conditions for Floor-standing Sequential Machines and Floor-standing Milling Mirror Machines". During the revision, only editorial modifications were made in accordance with relevant regulations, and the technical content has not been updated. Change. This standard is the concretization and supplement of GB/T9061-1988 "General Technical Conditions for Metal Cutting Machine Tools" and other standards. This standard is part of the "Floor Stand Milling and Boring Machine" series of standards, which includes the following four parts: JB/T4367.1—1999 Floor Stand Milling and Boring Machine Parameters JB/T4367.2—1999 Floor Stand Milling and Boring Machine Technical Conditions JB/T4367—1996 Floor-standing milling and boring machine accuracy inspection JB/T5602-1991 Floor-standing milling and boring machine series model standard will replace ZBnJ54024-89 from the date of implementation. This standard was proposed by the National Metal Cutting Machine Tool Standardization Technical Committee. This standard is under the jurisdiction of the Heavy Machine Tool Branch of the National Metal Cutting Machine Tool Standardization Technical Committee. The drafting unit of this standard is: Qiqihar Second Machine Tool Factory. Units participating in the drafting of this standard: Qiqihar Second Machine Tool Factory, Wuhan Heavy Machine Tool Factory, Wuhu Heavy Machine Tool Co., Ltd. This standard was first published in June 1989.
1 Scope
Machinery Industry Standard of the People's Republic of China
Floor Milling and Boring Machine
Technical Conditions
This standard specifies the manufacturing and acceptance requirements for floor milling machines skills requirement. JB/T 4367.2—1999
replaces ZBnJ54024—89
This standard is applicable to floor-standing machines with a clock axis diameter of 90~200mm and floor-standing milling mirror machines with a clock axis diameter of 130~260mm. 2. Reference standards
The provisions contained in the following standards constitute provisions of this standard through citation in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T9061—1988
GB/T 5226.11996
GB 15760—1995
GB/T 16769—1997
JB/T 43671996
JB/ T 9872—1999
JB/T 98731999
JB/T 9874—1999
JB/T9876—1999
JB/T 9877—1999
JB/T10051—1999
3 General requirements
General technical conditions for metal cutting machine tools
Industrial machinery and electrical equipment Part 1: General technical conditions for safety protection of metal cutting machine tools General technical conditions for metal cutting Machine tool noise sound pressure level measurement method Floor-standing milling and boring machine accuracy inspection
General technical conditions for machined parts
Metal cutting machine tools
General technical conditions for metal cutting machine tools and welding partsMetal cutting machine tools|| tt||General technical conditions for assembly
Metal cutting machine tools combined with surface coating method inspection and assessment of cleanliness determination
Metal cutting machine tools
Metal cutting machine tools
Hydraulic system General technical conditions
When accepting machine tools according to this standard, the remaining acceptance items in GB/T9061, JB/T9872, JB/T9874 and other standards that have not been integrated into 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) Machine tool anchor screws and wrenches;
b) Machine tool adjustment pads and wrenches; ||tt ||c) Machine tool installation lifting rings;
d) Special tools for loading and unloading tools:
e) Special tools for adjusting the mechanical safety mechanism. 4.2 The following special accessories can be supplied according to the agreement: a) Flat rotating disc;
National Machinery Industry Bureau approved on 1999-05-20 and implemented on 2000-01-01
b) Vertical milling head: ||tt ||c) Universal milling head:
d) Extended milling head;
e) High-speed milling head;
Fixed platform:
9) Heavy-duty rotary table :
h) digital display device. wwW.bzxz.Net
5 Safety and health
JB/T 4367.2—1999
5.1 The safety protection of machine tools should comply with the regulations of GB15760. 5.2 The hydraulic transmission system of the machine tool should comply with the regulations of JB/T10051. 5.3 The electrical equipment of machine tools should comply with the regulations of GB/T5226.1. 5.4 When opening the safety protection device may cause injury, the safety protection device should be interlocked with the machine tool working cycle. 5.5 The emergency stop operating mechanism should not automatically resume its function after completing the emergency stop action. 5.6 Guide rails and other parts that are easily worn by dust should be equipped with safety protection devices. 5.7 The balancing device of moving parts such as the spindle box must be placed inside the component, and there must be a device to prevent the balance weight from accidentally falling and damaging the machine tool. Safety protection devices should be installed outside. 5.8 Ladders, corridors and other corresponding devices should have strong non-slip foot pedals, and there should be continuous raised guards and railings along their edges. 5.9 If the machine tool is equipped with an elevator for personnel lifting, the regulations on elevator installation and safe use must be followed. 5.10 When the lowest position of the operating platform (corridor) is less than 2.2m from the ground, the protective plate should be painted with yellow and black lines of the same width at an angle of 45°, with a line width of 20~50mm. 5.11 Machine tools using static pressure installation should ensure that they can only be started after the static pressure is established. Safety should be ensured when pressure changes exceed regulations or power is interrupted.
6 Processing and assembly quality
6.1 The quality of machined parts should comply with the regulations of JB/T9872. 6.2 The quality of welded parts should comply with the requirements of JB/T9873. 6.3 Important castings such as bed, slide, column, spindle box, and ram must be aged after rough machining. Important castings of Class IV precision machine tools must undergo aging treatment after semi-finishing. 6.4 The slide seat and bed guide rail pair, the spindle box and column guide rail pair, the ram and the spindle box guide rail pair are important guide rail pairs, and wear-resistant measures should be taken. 6.5 The assembly quality of the machine tool should comply with the regulations of JB/T9874. 6.6 Parts and components during assembly should be cleaned. Screws assembled at the same location should have the same length. Screws and tightening forces that affect accuracy should be consistent.
6.7 Sliding guide rails and displacement guide rail pairs shall be inspected according to JB/T9876 and meet the following requirements. 6.7.1 The joint surfaces of the two mating parts are all scraped surfaces. When using the joint surface (lapping tool) of the mating parts for coloring inspection, the scraping and grinding points should be even and averagely calculated based on the specified calculation area. The number of contact points in each 25mmx×25mm area should not be less than the requirements in Table 1. Machine tool precision
degree
level
level IV
level V
JB/T4367.2—1999
Table 1||tt ||Sliding guide rail
Width of each guide rail
≤250
16
10
>250
Continue||tt| |12
Displacement guide
mm
≤[20
Number of contacts
12
00| |tt||>120
10
6
6.7.2 One of the joining surfaces of the two mating parts is a scraped surface and the other is a machined surface. When using the mechanically added T surface of the mating part to inspect the number of contact points on the scraped surface, it should not be less than 75% of the points specified in Table 1. 6.7.3 The lowest number of points in an individual 25mm×25mm area (one to two places) should not be less than 50% of the number of points specified in Table 1. 6.7.4 The contact points of the oil seal edge of the hydrostatic guide rail oil chamber should not be less than The number of points specified for the sliding guide in Table 1. Note
When the joint surface of the two mating parts is a set of guide rails with different widths, the inspection shall be in accordance with the provisions of the wide guide rails. 2 When calculating the average number of contacts in an area of ??25mm×25mm, the calculated area of ??IV-level precision machine tools is 100cm2, and the calculated area of ??V-level precision machine tools is 300cm.
6.7.5. The contact index of the joint surface of two mating parts processed by mechanical processing shall not be lower than that specified in Table 2. Table 2
Machine Tool Accuracy
Level
IN Level
V Level
Overall length
75
70| |tt||Back-moving guide rail
6.8 The gap between the joint surfaces of the mating parts should be inspected according to the following requirements. 6.8.1
Contact Index
Full Width Top
60
50
Full Length Top
65
60 | |tt | In addition to legal inspection, level IV precision machine tools also use 0.03mm feeler gauges, and level V precision machine tools also use 0.04mm feeler gauges for inspection. During inspection, the depth of the feeler gauge inserted between the sliding surfaces should not be greater than 25mm. a) Slide seat and bed guide rail pair:
b) Spindle box and column guide rail pair:
c) The sliding surface of the pressure plate, insert and bed guide rail on the slide seat; d) Spindle The pressure plate on the box, the sliding surface between the plating bar and the bed guide rail; e) the sliding surface between the mobile bracket and the rear tail rail. Note: The displacement guide rail shall be inspected according to the working condition. After the following important fixed joint surfaces in 6.8.2 are tightened, a 0.03mm feeler gauge shall be used for V-level precision machine tools, and a 0.04mm inspection shall be applied for V-level precision machine tools. During inspection, feeler gauges should not be inserted into people. a) The joint surface between the bed end surface and the bed end surface; b) The joint surface between the slide seat and the column;
c) The joint surface between the tail box and the main spindle box with the transmission screw support seat: d) The rack and the bed body joint surface;
e) screw bracket joint surface;
f) inlaid guide rail joint surface;
g) ram end surface and ram joint surface; ||tt| |h) Nut bracket joint surface.
JB/T 4367.2—1999
6.8.3 When inspecting with a feeler gauge, the depth of partial insertion (one or two places) is allowed to be no more than 5mm, and the length of the insertion part is no more than 100mm. Press one Plan.
6.8.4 When the static pressure guide rail is unloaded, the difference in lift around the moving parts should not exceed the design requirements. 6.9 After the multi-section spliced ??bed guide rails are joined, the misalignment of the adjacent guide rail guide surfaces should not be greater than 0.005mm. 6.10 At the bed segmentation, the contact length of the positioning taper pins (blocks) at the joints between the column and the slide seat, the column and the column (heightened type) should not be less than 60% of the working length of the taper pins, and should be evenly distributed at the joints both sides. 6.11 Within the working range, the operating force of the handwheel and handle should not exceed the requirements in Table 3. 6.12 The reverse free travel amount of the graduated handwheel should not exceed 1/8. 6.13 The noise of the machine tool should be inspected in accordance with the regulations of GB/T16769. There should be no abnormal squeaking or impact sounds when the machine tool is running. When operating at any speed, the noise sound pressure level of the entire machine should not exceed 85dB(A) when measured under approximate working conditions. Table 3
Bore spindle diameter
mm
90
130
160
200
260||tt| |Note
Frequently used
100
120
Operation
Weaving
1 pair for special requirements such as clamping and locking The handle and handle operating force are according to the design requirements. 2. The operating force of the handwheel and handle of the modified machine tool shall be in accordance with the requirements of the basic type. 6.14 The cleanliness shall be tested in accordance with the provisions of JB/T9877. Force
N
Infrequently used
160
200
6.14.1 The internal cleanliness of the spindle box shall be sampled and inspected by the gravimetric method. The substance content should not exceed 400mg/L (spot check). 6.14.2 The cleanliness of the oil in the hydraulic system shall be sampled and inspected by gravimetric method, and its impurity and dirt content shall not exceed 200 mg/L (spot inspection). 6.14.3 Other parts should be inspected by visual inspection and hand feeling. There should be no dirt. 7 Machine tool dry running test
7.1 The machine tool dry running test is carried out in accordance with the provisions of GB/T9061. The temperature measurement point is at the small diameter of the boring spindle taper hole. During the temperature rise test, the ram, spindle and milling spindle are all retracted.
7.2 The fast moving mechanism should be tested for fast movement. The column and spindle box make three consecutive reciprocating movements respectively, and there should be no failure, and the limit mechanism should be reliable.
7.3 The feeding mechanism should be tested for stability. There should be no crawling when moving at low speeds. 4
JB/T4367.21999
7.4 The dry running power at all levels of the machine tool's main transmission system should comply with the design requirements. 7.5 The error between the measured speed of the boring spindle and the milling spindle at all levels and the value indicated on the signboard should not exceed -2%~+6%. The feed system error in feed amount expressed in millimeters per minute should not exceed -2%~+6%. 8 Machine tool load test
8.1 The machine tool should be subjected to the following load test:
a) Maximum torque test of the main transmission system;
b) The main transmission system exceeds the maximum torque by 25% in a short time Test: c) Test of the maximum cutting main component force of the main transmission system: d) Test of the main transmission system exceeding the maximum cutting main component force by 25% for a short time; e) Maximum power test of the main transmission system.
8.2 Machine tools produced in batches are not allowed to perform the two tests b) and d). Both items a) and c) can be tested at 2/3 of the maximum torque and the maximum main component force before shearing. 8.3 The load test shall be carried out in accordance with the provisions of the design documents. During the load test, all mechanisms of the machine tool should operate normally. 9 Machine tool accuracy inspection
9.1 Machine tool accuracy inspection shall be carried out in accordance with JB/T4367. 9.2 The geometric accuracy should be carried out after the dry running test of the machine tool, and the working accuracy should be carried out after the geometric accuracy inspection is passed. The maximum allowable value of hole surface roughness R is 1.6 μm, and the maximum allowable value of milling plane surface roughness R is 3.2 μm. 9.3 The following inspection items and working accuracy should be inspected after the spindle runs at medium speed to a stable temperature. The rotation speed during inspection is low speed. : Radial runout of the taper hole axis of the G5 boring spindle:
Radial runout of the G6 boring spindle;
G7—axial movement of the boring spindle;
G11—milling spindle Radial runout;
The axial movement of the G12 milling spindle.
13. Machine tool noise should be inspected in accordance with the provisions of GB/T16769. There should be no abnormal squeaking or impact sounds when the machine tool is running. When operating at any speed, the noise sound pressure level of the entire machine should not exceed 85dB(A) when measured under approximate working conditions. Table 3
Bore spindle diameter
mm
90
130
160
200
260||tt| |Note
Frequently used
100
120
Operation
Weaving
1 pair for special requirements such as clamping and locking The handle and handle operating force are according to the design requirements. 2. The operating force of the handwheel and handle of the modified machine tool shall be in accordance with the requirements of the basic type. 6.14 The cleanliness shall be tested in accordance with the provisions of JB/T9877. Force
N
Infrequently used
160
200
6.14.1 The internal cleanliness of the spindle box shall be sampled and inspected by the gravimetric method. The substance content should not exceed 400mg/L (spot check). 6.14.2 The cleanliness of the oil in the hydraulic system shall be sampled and inspected by gravimetric method, and its impurity and dirt content shall not exceed 200 mg/L (spot inspection). 6.14.3 Other parts should be inspected by visual inspection and hand feeling. There should be no dirt. 7 Machine tool dry running test
7.1 The machine tool dry running test is carried out in accordance with the provisions of GB/T9061. The temperature measurement point is at the small diameter of the boring spindle taper hole. During the temperature rise test, the ram, spindle and milling spindle are all retracted.
7.2 The fast moving mechanism should be tested for fast movement. The column and spindle box make three consecutive reciprocating movements respectively, and there should be no failure, and the limit mechanism should be reliable.
7.3 The feeding mechanism should be tested for stability. There should be no crawling when moving at low speeds. 4
JB/T4367.21999
7.4 The dry running power at all levels of the machine tool's main transmission system should comply with the design requirements. 7.5 The error between the measured speed of the boring spindle and the milling spindle at all levels and the value indicated on the signboard should not exceed -2%~+6%. The feed system error in feed amount expressed in millimeters per minute should not exceed -2%~+6%. 8 Machine tool load test
8.1 The machine tool should be subjected to the following load test:
a) Maximum torque test of the main transmission system;
b) The main transmission system exceeds the maximum torque by 25% in a short time Test: c) Test of the maximum cutting main component force of the main transmission system: d) Test of the main transmission system exceeding the maximum cutting main component force by 25% for a short time; e) Maximum power test of the main transmission system.
8.2 Machine tools produced in batches are not allowed to perform the two tests b) and d). Both items a) and c) can be tested at 2/3 of the maximum torque and the maximum main component force before shearing. 8.3 The load test shall be carried out in accordance with the provisions of the design documents. During the load test, all mechanisms of the machine tool should operate normally. 9 Machine tool accuracy inspection
9.1 Machine tool accuracy inspection shall be carried out in accordance with JB/T4367. 9.2 The geometric accuracy should be carried out after the dry running test of the machine tool, and the working accuracy should be carried out after the geometric accuracy inspection is qualified. The maximum allowable value of hole surface roughness R is 1.6 μm, and the maximum allowable value of milling plane surface roughness R is 3.2 μm. 9.3 The following inspection items and working accuracy should be inspected after the spindle runs at medium speed to a stable temperature. The rotation speed during inspection is low speed. : Radial runout of the taper hole axis of the G5 boring spindle:
Radial runout of the G6 boring spindle;
G7—axial movement of the boring spindle;
G11—milling spindle Radial runout;
The axial movement of the G12 milling spindle.
13. Machine tool noise should be inspected in accordance with the provisions of GB/T16769. There should be no abnormal squeaking or impact sounds when the machine tool is running. When operating at any speed, the noise sound pressure level of the entire machine should not exceed 85dB(A) when measured under approximate working conditions. Table 3
Bore spindle diameter
mm
90
130
160
200
260||tt| |Note
Frequently used
100
120
Operation
Weaving
1 pair for special requirements such as clamping and locking The handle and handle operating force are according to the design requirements. 2. The operating force of the handwheel and handle of the modified machine tool shall be in accordance with the requirements of the basic type. 6.14 The cleanliness shall be tested in accordance with the provisions of JB/T9877. Force
N
Infrequently used
160
200
6.14.1 The internal cleanliness of the spindle box shall be sampled and inspected by the gravimetric method. The substance content should not exceed 400mg/L (spot check). 6.14.2 The cleanliness of the oil in the hydraulic system shall be sampled and inspected by gravimetric method, and its impurity and dirt content shall not exceed 200 mg/L (spot inspection). 6.14.3 Other parts should be inspected by visual inspection and hand feeling. There should be no dirt. 7 Machine tool dry running test
7.1 The machine tool dry running test is carried out in accordance with the provisions of GB/T9061. The temperature measurement point is at the small diameter of the boring spindle taper hole. During the temperature rise test, the ram, spindle and milling spindle are all retracted.
7.2 The fast moving mechanism should be tested for fast movement. The column and spindle box make three consecutive reciprocating movements respectively, and there should be no failure, and the limit mechanism should be reliable.
7.3 The feeding mechanism should be tested for stability. There should be no crawling when moving at low speeds. 4
JB/T4367.21999
7.4 The dry running power at all levels of the machine tool's main transmission system should comply with the design requirements. 7.5 The error between the measured speed of the boring spindle and the milling spindle at all levels and the value indicated on the signboard should not exceed -2%~+6%. The feed system error in feed amount expressed in millimeters per minute should not exceed -2%~+6%. 8 Machine tool load test
8.1 The machine tool should be subjected to the following load test:
a) Maximum torque test of the main transmission system;
b) The main transmission system exceeds the maximum torque by 25% in a short time Test: c) Test of the maximum cutting main component force of the main transmission system: d) Test of the main transmission system exceeding the maximum cutting main component force by 25% for a short time; e) Maximum power test of the main transmission system.
8.2 Machine tools produced in batches are not allowed to perform the two tests b) and d). Both items a) and c) can be tested at 2/3 of the maximum torque and the maximum main component force before shearing. 8.3 The load test shall be carried out in accordance with the provisions of the design documents. During the load test, all mechanisms of the machine tool should operate normally. 9 Machine tool accuracy inspection
9.1 Machine tool accuracy inspection shall be carried out in accordance with JB/T4367. 9.2 The geometric accuracy should be carried out after the dry running test of the machine tool, and the working accuracy should be carried out after the geometric accuracy inspection is passed. The maximum allowable value of hole surface roughness R is 1.6 μm, and the maximum allowable value of milling plane surface roughness R is 3.2 μm. 9.3 The following inspection items and working accuracy should be inspected after the spindle runs at medium speed to a stable temperature. The rotation speed during inspection is low speed. : Radial runout of the taper hole axis of the G5 boring spindle:
Radial runout of the G6 boring spindle;
G7—axial movement of the boring spindle;
G11—milling spindle Radial runout;
The axial movement of the G12 milling spindle.
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