JB/T 3665-1996 Technical requirements for single-column and double-column vertical lathes
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T3665-96
Single-column and double-column vertical lathes
Technical conditions
Published on April 11, 1996
Ministry of Machinery Industry of the People's Republic of China
Implementation on October 1, 1996
Mechanical Industry Standard of the People's Republic of China
Single-column and double-column vertical lathes
Technical conditions
1 Subject content and scope of application
This standard specifies the requirements for the manufacture and acceptance of single-column and double-column vertical lathes. JB/T3665-96
Replaces JBn366584
This standard applies to general-purpose single-column and double-column fixed vertical lathes with a maximum turning diameter of 630 to 8000 mm. 2 Reference standards
GB5226
GB9061
JB4116
JB4139
ZBJ50003
ZBJ50004
ZBnJ50008.1
ZBnJ50008.3
ZBJ50016
3 General requirements
General technical conditions for electrical equipment of machine tools
Metal cutting machine tools General technical conditions
Precision of single-column and double-column vertical lathes
Technical conditions for safety protection of metal cutting machine tools and machine tool accessories Determination of cleanliness of metal cutting machine tools
Determination of sound pressure level of noise of metal cutting machine tools General technical conditions for machining parts of metal cutting machine tools General technical conditions for assembly of metal cutting machine tools General technical conditions for hydraulic systems of metal cutting machine tools This standard specifies and supplements GB9061, ZBnJ50008.1, ZBnJ50008.3, etc. When accepting machine tools according to this standard, the remaining acceptance items in the above standards that are not specified in this standard must be inspected at the same time. 4
Accessories and tools
The following accessories and tools should be supplied randomly:
Special wrench, 1 set;
High-pressure oil gun for disassembling spindle bearings (applicable to machine tools in need), 1 piece: b.
Lubricating oil gun, 1 piece;
Anchor bolts, nuts, washers, adjusting shims and anchor bolt positioning sleeves, supplied according to the actual needs of the machine tool; d
Special wrenches (such as wrenches for installing spliced bases, wrenches for adjusting the angle of the main tool holder, wrenches for clamping the crossbeams, wrenches for feed boxes, etc.), 1 set.
The following special accessories can be supplied according to the agreement:
a. Milling head:
b. Grinding head;
c. Boring head:
d. Chip removal device:
Approved by the Ministry of Machinery Industry on April 11, 1996
Implemented on October 19, 1996
e. Tools and fixtures.
Safety and HealthbzxZ.net
JB/T3665—96
The crossbeam, tool holder and ram should be equipped with limit or collision prevention devices. The workbench should be started only after the oil pressure is established. The feed movement can only be started after the workbench is running normally and the crossbeam is clamped. 5.3
The workbench can only be stopped after the feed movement stops. 5.4
5.5The sliding guide rails of the workbench should be equipped with guide rail protection devices. 5.6
There should be no abnormal screaming and impact sounds during the crossbeam lifting movement, main speed change movement and feed movement. 5.7 The noise sound pressure level of the machine tool shall be inspected in accordance with the provisions of ZBJ50004. The noise measurement of the machine tool shall be carried out under the conditions of low, medium and high speed idling of the main movement and the corresponding feed movement, and the noise sound pressure level of the whole machine shall not exceed 85dB(A)5.8 The operating force of the handwheel and handle shall be assessed in accordance with the following provisions: a. The operating force of the feed handwheel and handle shall not be greater than 160N; b. The operating force of other handwheels and handles that are not frequently used shall not be greater than 200N. 5.9 When accepting the machine tool according to this standard, the remaining acceptance items in GB5226, JB4139, ZBJ50016, etc. that are not specified in this standard must be inspected at the same time.
6 Machining and assembly quality
The following important castings shall be subjected to aging treatment after rough machining: 6.1
a. Workbench;
Base (including split type):
c. Column;
Beam:
Main gearbox;
f. Vertical tool holder ram, side tool holder ram; g.
Tool holder body, slide seat.
Main parts that are easy to wear, such as worm gear, worm, clutch, screw, nut, sleeve, etc., shall adopt wear-resistant measures that are suitable for their service life. The following sliding guide pairs should use wear-resistant cast iron, steel-inlaid guides, plastic-coated guides or adopt wear-resistant measures such as high (medium) frequency induction quenching: 6.3
a. Workbench and base guide pair;
Vertical tool holder and slide ram guide pair:
Side tool holder and slide ram guide pair;
Slide seat and crossbeam guide pair:
Side tool holder and column guide pair:
Beam and column guide pair.
The following joint surfaces shall be evaluated according to the requirements of "important fixed joint surfaces" a.
The joint surface of the combined base and worktable: the joint surface between the base and the column:
The joint surface between the side of the column and the connecting beam:
The joint surface between the base and the gearbox;
The joint surface between the crossbeam and the feed box;
JB/T3665—96
f. The joint surface between various lead screws, light bar supports and the base. 6.5 The following joint surfaces shall be evaluated according to the requirements of "particularly important fixed joint surfaces": a. The joint surface between the rotary tool head of the vertical tool holder and the slide locating plate (or locating pin): b. The joint surface between the tool holder cover and the tool holder body:
c The joint surface between the tool holder body and the slide seat (free state is not evaluated): The joint surface between the square tool holder of the side tool holder and the slide ram. d
6.6 Except for the beam and column guide rails which are assessed according to the requirements of the displacement guide rails, the other guide rails shall be assessed according to the requirements of the sliding guide rails. 6.7 The following important positioning taper pins shall be inspected by the coloring method, and their contact length shall not be less than 60% of the working length of the taper pins, and shall be evenly distributed on both sides of the joint.
Positioning taper pins of the column and the base:
b. Positioning taper pins of the tool table positioning plate;
C. Positioning taper pins of the adjustment bracket of the light bar and the lead screw: d. Positioning taper pins of the splicing workbench and the base. 6.8 The reverse idle stroke of the handwheel and handle with a scale device for horizontal feed and vertical feed shall not be greater than 1/4r. 6.9 The oil tanks and chambers for storing lubricating oil and hydraulic oil shall be subjected to leakage tests. 6.10 Cleanliness shall be inspected according to the provisions of ZBJ50003. Among them, the internal cleanliness of the main transmission box and feed box, hydraulic oil tank and lubricating oil tank shall be sampled and inspected by weight method. The content of impurities and dirt in the main transmission box and feed box should not exceed 400mg/L, and the content of impurities and dirt in the hydraulic oil tank and lubricating oil tank should not exceed 200mg/L
7 Machine tool idle running test
7.1 The main motion mechanism of the machine tool shall be operated in sequence from the lowest speed. The continuously variable speed machine tool shall be tested for low, medium and high speed operation. The operation time of each speed level shall not be less than 5min (the speed change rest time shall not exceed 1min) and the high speed operation time shall not be less than 1h, so that the spindle bearing reaches a stable temperature. Measure the temperature and temperature rise at the contact point between the spindle bearing cover and the box body, and the value shall not exceed the provisions of Table 1. Table 1
Bearing type
Sliding bearing
Rolling bearing
The temperature rise test of the hydraulic system shall comply with the provisions of ZBJ50016. Temperature rise
7.2 The vertical tool holder, side tool holder and slide shall be tested for fast movement and idle running. During the test, the tool holder and the ram are continuously reciprocated for 2 times, and the working conditions such as the feed motor current are checked at the same time.
The vertical tool holder, side tool holder and ram feed movement selects an appropriate feed amount to start and stop 3 times in a row to check the reliability of the action. 7.3 The crossbeam runs through the full stroke once, and there should be no screaming sound during the relative movement of the lifting screw nut. 7.4 Special accessories such as milling heads, grinding heads, boring heads, etc. should also be tested for idling, which should not be less than 1 hour at high speed. 7.5 When the workbench is at the lowest and highest speeds, start, forward, reverse, brake, and stop 5 times in a row to test the reliability of the action. The speed change handle and hydraulic speed change should be tested for their correctness and flexibility of operation. 7.6 The actual deviation of the spindle speed and feed rate shall not exceed ±6% of the indicated value on the nameplate: The actual deviation of the spindle speed and feed rate of the continuously variable transmission shall not exceed ±10% of the indicated value on the nameplate 7.7 The idling power of the main transmission system (excluding the no-load power of the main motor) shall not exceed 25% of the rated power of the main motor: For sliding or hydrostatic guideway machine tools, the idling power shall be assessed based on the calculated speed. 3
8 Machine tool load test
This series of machine tools shall be subjected to the following load tests: JB/T 3665—9
Machine tool operation test with the maximum weight of the workpiece (spot check) a.
Maximum torque test of machine tool main transmission system; b.
Maximum power test of machine tool main transmission system: c
Main component force test of maximum cutting resistance of machine tool d
e. Test of main transmission system of machine tool with diameter less than or equal to 3150mm for short-term exceeding 25% of maximum torque, and test of main component force of maximum cutting resistance for short-term exceeding 25%; Machine tool with diameter greater than 3150mm shall only be tested for maximum torque and maximum power. 8.1 Operation test of machine tool bearing maximum weight of workpiece, the workbench shall operate at low speed and high speed specified in design, and the operation time shall not be less than 30min
8.2 Test of maximum torque, maximum power, main component force of maximum cutting resistance of machine tool main transmission, as well as test piece materials, cutting specifications, etc. shall be in accordance with the design documents.
Note: Maximum power refers to the calculated power specified in the design of machine tool. The main force of the maximum torque and the maximum cutting resistance is calculated according to formula (1) and formula ②): T=
Where: T
Torque, N·m;
Main force of cutting resistance, N:
Grid input power during cutting, kW:
9550(PP)
9550(PP)
Grid input power during idling (with workpiece), kW: Cutting radius, m;
Spindle speed, r/min.
8.3 The main transmission system of the machine tool is tested for a short time exceeding the main force of the maximum torque and maximum cutting resistance specified in the design by 25%, and the test time is not less than 1min (spot check).
8.4 During each load test, the machine tool should work smoothly and reliably. Machine tool precision inspection
Precision inspection is carried out in accordance with JB4116.
The coincidence of the axis of the tool hole of the swivel head and the axis of rotation of the worktable shall be checked when the machine tool is at medium speed and stable temperature. 3 Working accuracy test specifications shall be carried out in accordance with the design documents. 9.3
When testing working accuracy, the maximum allowable value of the surface roughness R of the test piece is 3.2um. Additional remarks:
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. This standard was drafted by Wuhan Heavy Machine Tool Factory. This standard was first issued in 1984.
Mechanical Industry Standard
Single-column and double-column vertical lathes
JBT3665-96
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 880×12301/16 Printing Sheet 1/2
Word Count 8000
First Edition in October 1996
First Printing in October 1996
Print Quantity 1-500
Price 500 Yuan
Mechanical Industry Standard Service Network: http:/hvwwJB.ac.cn99
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