JB/T 9910.2-99 This standard is a revision of ZBn J55 034-88 "Technical requirements for manufacturing and acceptance of high-precision horizontal spindle and rotary table surface grinders". During the revision, only editorial changes were made according to relevant regulations, and the technical content has not changed. This standard is a concretization and supplement to GB/T 9061-1988 "General Technical Conditions for Metal Cutting Machine Tools" and other standards. This standard is part of the series of standards JB/T 9910 "High-precision horizontal spindle rotary table surface grinders", which includes the following two parts: JB/T 9910.1-1999 Accuracy inspection of high-precision horizontal spindle rotary table surface grinders JB/T 9910.2-1999 Technical conditions for high-precision shaft rotary table surface grinders The standards that match this series of standards are: JB/T 9908.1-1999 Parameters of horizontal spindle rotary table surface grinders JB/T 9908.2-1999 Series of horizontal spindle rotary table surface grinders This standard specifies the requirements for the manufacture and acceptance of vertical spindle rotary table surface grinders. This standard is applicable to high-precision horizontal spindle rotary table surface grinders with a worktable diameter of 320~1000mm, which are of movable table slide type, movable grinding head type and movable column type. This standard was first issued on October 12, 1988. JB/T 9910.2-1999 Technical Specifications for High Precision Horizontal Spindle Surface Grinding Machines JB/T9910.2-1999 Standard Download Decompression Password: www.bzxz.net

rCs25.080.50
Machinery Industry Standard of the People's Republic of China
JB/T9910,19910.2—1999
High Precision Horizontal Spindle Circular Table Surface Grinding Machine
[999-05-21] Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9516.2—1999
This standard is formulated on the basis of ZBnJ5503488 "Technical Requirements for Manufacturing and Acceptance of High Precision Horizontal Spindle Circular Table Surface Grinding Machine". This standard is a specific and supplementary standard such as G/19061-19 "General Technical Conditions for Metal Scratching Machine Tools". This standard is consistent with the technical content of ZBnJ55034-88 and has been re-edited in accordance with relevant regulations. This standard is part of the JB/T9910 series of standards for high-precision horizontal axis table surface grinding machines. This series of standards includes the following two parts:
JA/T9910.1-1999 Accuracy inspection of high-precision horizontal axis rotary table surface grinders B997.2—1999 Technical conditions for high-precision horizontal axis rotary table surface grinders The standards that match this standard are:
JB/T9908.1—1999 Parameters of horizontal single-seat table half-surface grinders B9908.2—1999 Series of shaft rotary table surface grinders This standard replaces ZBmJ55034B8 from the date of implementation. This standard was proposed by the National Technical Committee for Cutting Machine Tools and is under the jurisdiction of the National Technical Committee for Cutting Machine Tools. The responsible unit for the issuance of this standard is Tianjin Grinding Factory. This standard was first issued on October 12, 1988. ED
1 Scope
Standard of the Machinery Industry of the People's Republic of China
High Precision Horizontal Spindle Circular Table Surface Grinding Machine
Technical Conditions
This standard specifies the requirements for the acceptance of high precision horizontal spindle and circular table surface grinding machines. [B/9910.2-1999
￥ZBnJ55D3-1—8B
This standard is applicable to high precision horizontal spindle and circular table surface grinding machines with movable table plate, movable grinding head and movable column with a table diameter of 320-10mm.
2 Referenced Standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all valid. All standards may be revised. Parties using blank standards should consider the feasibility of using the latest version of the following standards. GE; 10311995
GB/T 5226.1--1996
GBT9061
GB 15760
JB40291985||JR/T9872-1999
|JB/T9877-1999
JB/T9910.1—1999
JB/T 10051—[999
3-1 requirements
Surface roughness number and its value
Industrial visual inspection and electrical equipment Part 1: Technical conditions for reverse use General technical conditions for metal cutting machine tools
General technical conditions for safety protection of metal primary cutting machine tools Technical requirements for safety protection of grinding wheel guards of grinders General technical conditions for plate processing of metal weak cutting machines General technical conditions for assembly of metal scratching machine tools Determination of the resistance of metal cutting machines
Test of resistance of high-speed horizontal shaft and torque table guards of grinders General technical conditions for reduction systems of metal cutting machine tools When obtaining the standard acceptance of the machine tool, the other acceptance items that have not been standardized in the standards such as GB/T9061, JB/T9872, /9874, etc. must be inspected at the same time.
4 Accessories and tools
The accessories and tools listed in Table 1 should be supplied randomly. 5 Approved by China Machinery Industry Bureau on May 20, 2000 and implemented on January 1, 2000
Parts
Seat, cleaning and cooling weight
Grinding wheel and its chuck
European wheel dresser
Balance shaft
Special tools for machine tools
Electric car lock
JB/T9910.2-199
Dust purification and cooling part
Dense cutting
Quick dressing grinding wheel
Balanced grinding wheel
Installation of machine tools
Specifications: The accessories and tools listed in the table. 1 The material points can be increased or decreased according to the machine conditions and user agreement. 5 Safety and Health
5.1 The rising movement of the grinding head shall be equipped with a limit or a speed control device, and the machine tool shall be able to step. ! The number of units on the machine tool shall be determined according to the size of the machine tool.
5.2 The electromagnetic table rotation and sharp avoidance, the rapid descent of the grinding head and the spindle rotation and the table rotation can be linked: and the operation can be carried out with a T, 5.3 The horizontal movement and the straight movement method should have good protective devices, and should be strong and durable. 5.4 The grinding wheel protection cover should meet the requirements of JD, 4029. 5.5 The machine tool has a device to prevent the workpiece from flying out and the coolant from flying out. 5.6 The pneumatic system and the hydraulic system should meet the requirements of GB/T5226.1 and JB/T10051 respectively. 5.? The safety protection of the machine tool also complies with the provisions of GB15760. 6. Processing and assembly quality
6.1 The longitudinal guide pair of the bed and the circular guide pair of the worktable are necessary guide pairs, and wear-resistant measures should be taken. 6.2 The weaving guide brush of the bed, the circular guide pair of the worktable and the vertical moving guide pair of the head should be assessed according to the requirements of "moving guides". 6.3 The angled guide pair of the worktable should be assessed according to the requirements of "moving guides". 6.4 The following important castings must be artificially treated after roughing and finishing: a) bed;
a) longitudinal sliding plate;
e) work frame;
d) column;
e) head body.
6.5 The joint surface between the head body and the pressure plate, and the pin joint surface between the sample and the steel rail should be assessed according to the requirements of "special fixed joint surface". 6. The connection between the column and the bed shall be assessed according to the requirements of "important fixed connection surface". 6.? The operating force of the vertical feed handwheel shall be assessed according to the "frequently used" requirements: the operating force of the remaining handwheels and hands shall be assessed according to the "infrequently used" requirements.
6.% The reverse idle stroke of the handwheel for vertical feed retraction shall not exceed 1/20r. 6." The grinding wheel shaft, together with the motor shaft, wind steel and other rotating parts on the shaft, shall be dynamically balanced and corrected at the specified position. After correction, the double grip width caused by the residual unbalance shall not be greater than 2m. 6.10 Inspect the cleanliness according to the provisions of JB/T9877, and the cleanliness of the oil chamber inside the head shall be inspected by weight method, and the total impurities and dirt shall not exceed 200mg.
FB/T 9910.2—1999
6.11 To ensure the stable working temperature of the machine tool, the control method of visual deformation should be adopted to test the idling operation of the machine tool
7.1 Temperature test of the machine tool
The machine tool or its parts shall be kept idling for not less than 4 hours (the high-speed rotation time of the grinding head shall not be less than 1 hour) and the temperature shall be kept constant. The temperature and temperature rise of the plate shall be measured at the bearing of the grinding head (or oil frost) and the oil pool of the bed. The temperature shall not exceed the relevant standards and design requirements. tt||7.1 Test of idle power of the grinding head
The idle power of the externally driven grinding head shall not exceed ±15% of the specified index: the idle power of the externally driven grinding head shall not exceed ±23% of the specified index.
1 To determine the average idle power index of the grinding head, 10 sets of grinding heads with good assembly quality can be selected, and their narrow power consumption can be measured. The average value is used as the estimated standard. 2 When measuring, the idle power of the motor is not included in the externally driven grinding head. .3 Test of the feed rate of the grinding head
.3.1 Efficiency head Feed with the minimum vertical feed disk. The error of each feed should not exceed 0% of the minimum feed amount. The cumulative error of one consecutive feed should not exceed 160% of its minimum feed amount. 7.3.2 Inspection method: Fix the indicator on the curved head: . Also, let the probe touch the workbench vertically. Feed the head with the minimum feed short feed for 10 times in reverse order, and record the indicator reading (each feed can be arbitrarily selected from 10 feeds). The error is calculated according to formula (1) and formula (2): Each feed error: ||tt| |10 times feed error adjustment
Where: 4-actual feed selection each time:
—minimum nominal feed range
7.4 Test of stable operation of workbench
Move the workbench carriage to about 0.05m/mln, and use the indicator with a value of 1.01mm to test within the maximum stroke range. The indicator needle should rotate evenly and continuously.
5 Test of reciprocating speed difference of workbench carriage
Move the workbench carriage at 0.1.2m/min speed range and the speed difference of the large stroke shall not be greater than 1% error step (3 calculation:
error -2100%
where: , -- respectively 7. Table reciprocating one-way time, 7.6 Workbench slide switching accuracy inspection
7.6.1 Workbench slide switching error: the intermediate speed is not more than a.1mm; the different speed is not more than .3mm1. 6. 2 Inspection method
) The workbench slide moving speed is 0.1-0.2m/mi; (3)
b) The workbench slide moves in the full stroke: (3) The same speed and different speeds are reciprocated 5 times:
d1 It adopts 0.011l indication indication Jiang bZxz.net
JB/T 9910.2-1999
Note: During the inspection, the worktable drag plate should stop at both ends for less than 1.55:7. The worktable should run smoothly within the entire speed range without impact; it should stop quickly without reversing; there should be no creeping at low speed. 8 Machine tool load test
This series of machine tools should be subject to the following load tests: a) The machine tool carries the heaviest workpiece running test: b) The grinding head motor rated (or design specified) power test, 8.1 The milling machine carries the workpiece. The large-scale running test (spot check) is carried out according to the design specifications. The worktable (rotation) and its drag (efficiency) should run smoothly without abnormal noise and vibration. After the load is over, the relevant geometric accuracy items of the machine tool should be qualified. The maximum load of the machine tool is determined according to formula (4): W=02202
×Ho×10
Where: D is the diameter of the worktable, mm:
. H is the thickness of the ground workpiece, mm:
p is the density of the workpiece, p7.8gfcm.
2 Test specification for rated (or specified by design) power of grinding head motor:
) The test piece is annular:
When the diameter of the workbench is 500mm, the outer diameter of the test piece is D, 4D/5 is the total diameter of the workbench ≥ mm, the outer diameter of the test piece is k
The inner diameter of the test piece is the total grinding area of ​​the test piece, which is not less than 3/4 of the total area of ​​the non-porous parts: the material of the test piece is GCT15. The hardness is 60HRC
b) Workbench transfer: medium speed;
c) The longitudinal movement speed of the workbench slide: 0.11.3m/min: d) Grinding head vertical feed: feed evenly from the minimum value until the grinding head motor reaches the rated (or specified by design) power. 9 Machine tool precision inspection
9.1 Precision inspection shall be carried out in accordance with the provisions of B9910.1. 9.1 The roughness of the surface of the test piece shall be in accordance with the provisions of GB/T1031, and its R value shall not be greater than 0.32 μm. 3 The roughness of the surface of the test piece shall be in accordance with the provisions of GB/T1031, and its R value shall not be greater than 0.08 μm. 9.51 When performing precision inspection, the surface roughness of the test piece shall not exceed 1 μm. (4)
9.6 In B/T 9910.1-1999, one of the precision inspections G4, G6 and P1 is a thermal inspection item. It should be inspected when the machine tool reaches a stable temperature.
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.