JB/T 9907.2-2000 This standard is a revision of JB/T 9907.2-1999 "Technical requirements for manufacturing and acceptance of double-sided grinders" based on GB/T 9061-1988 "General technical requirements for metal cutting machine tools", JB/T 9872-1999 "General technical requirements for machining of metal cutting machine tools", JB/T 9874-1999 "General technical requirements for assembly of metal cutting machine tools". This standard is part of the JB/T 9907 "Double-sided grinder" series of standards. This series of standards includes the following two parts: JB/T 9907.1-1999 Double-sided grinder series JB/T 9907.2-2000 Double-sided grinder technical conditions The standards that match this standard are: GB/T 7177-1987 Double-sided grinder parameters JB/T 9915-1999 Vertical double-end grinder precision inspection JB/T 9916-1999 Horizontal double-end grinder precision inspection This standard specifies the manufacturing and acceptance requirements for double-end grinders. This standard is applicable to horizontal double-end grinders with grinding wheel outer diameters of 250~900mm and vertical double-end grinders with grinding wheel outer diameters of 400~750mm. This standard was first issued in December 1987 as ZB J55 014-87, and the standard number was adjusted to JB/T 9907.2-1999 in April 1999. JB/T 9907.2-2000 Technical requirements for double-sided grinding machines JB/T9907.2-2000 Standard download decompression password: www.bzxz.net

JCS25.080.50
Machinery Industry Standard of the People's Republic of China
JB/T9907.2—2000
Double disc surface grinding machine
Technical conditions
Double disc surface GrinderSpecifications2000-04-17 Issued
State Machinery Industry Bureau
2000-09-01 Implementation
JB/T9907.2—2000
This standard is based on GB906】1988 "General Technical Specifications for Goldwind Cutting Machine Tools" 1B/T9972-1999 (Goldwind Cutting Machine Tools General Technical Specifications for Mechanical Workpieces 2, JB/T9374-1999 General Technical Specifications for Metal Cutting Machine Tool Assembly", and is a revision of JB9907.2—1999 [7R15511—Technical Requirements for Double-ended Grinding Machine Tool Manufacturing and Acceptance] , and the original standard was edited and revised; the requirements for the calibration of the droplet cleanliness of the sensor head spindle and the provisions for the load test were added, and the other technical contents remained basically unchanged. This standard supplements and specifies the standards such as JE/T9872 and JBT9S374 according to the structural characteristics of the end face grinder and the user's requirements. This standard is part of the JB/T9907 series of standards for double-end face grinders. This series of standards includes the following two parts: JB/T9907.1—1999 Series of double-end face grinders JB/T9907.2—1999 Technical conditions for double-end face grinders Other standards used in conjunction are: GB717 7-1987 Double-end grinding machine parameters
JB/199151999 Vertical double-end grinding machine precision inspection JB/T99161999 Horizontal double-end grinding machine precision inspection This standard replaces BJ9907.21999 from the date of implementation. This standard was proposed by the National Metallurgical Machine Tool Standardization Technical Committee and the Technical Standard was proposed by the National Metallurgical Machine Tool Standardization Technical Committee Grinding Branch: This standard was drafted by Shanghai Machine Tool Factory Co., Ltd. This standard was first issued in December 1987 as Z-date 55014-8, and the standard number was adjusted to JB/19507.2-1999 in April 1999,
China Machinery Industry Standard
Technical conditions for double-end surface grinders
Doubkedisckurfaengrinder-Specificatipns This standard specifies the requirements for the manufacture and acceptance of double-end surface grinders. JR/T99072-2000
Replaces JB/T9907.2—1999
This standard applies to horizontal double-end grinders with grinding wheel outer diameters of 250~900mm and vertical double-end grinders with grinding wheel outer diameters of 400-750mm. 2 Reference standards
The texts contained in the foreign standards constitute the provisions of this standard through reference in this standard. When this standard is revised, the versions shown are valid. All standards will be revised. All parties using this standard shall discuss the possibility of using the latest versions of the following standards. GR/T 1031—1995
CB/T 9061--1988
3B/T98721999
B/9874—1999
JB/T 9877—1999
JE/T9915.-1999
JB/ 9916-1999
Surface roughness parameters and their values
General technical conditions for metal cutting machine tools
Technical conditions for reverse use of machined parts of metal cutting machine toolsGeneral technical conditions for assembly of metal cutting machine tools
Determination of the finish of metal cutting machine tools
Precision inspection of vertical double-end grinders
Precision inspection of horizontal double-end grinders
General technical conditions for hydraulic systems of metal cutting machine toolsJB/T I051 ... 1999
3 General requirements
This standard is used to inspect machine tool size. It is necessary to select and inspect the remaining acceptance items in GR/9061, old/9872, JD/T9874 and other standards that are not specified in this standard.bzxz.net
4 Accessories and tools
4. The accessories and tools listed in Table 1 are provided randomly. The national machinery industry approved it on 2000-04-17 and implemented it on 2000-09-01
Accessory name
Coolant
Grinding wheel chuck
Flat tearing shaft
Machine control and its properties
Suitable material plate
Guide belt
Special transmission belt
Special blade seal
JB/T99072—2004
Middle grinding wheel
Accuracy inspection
Installation and installation
Adjust the installation level
Tighten the taste and wear the numb foot
Feeding support
Feeding
Note: According to the strict needs of the state and the design regulations, the varieties and quantities of the brush parts can be supplied according to the special parts listed in Table 2. 4.1
Parts name
Special grinding wheel
Coolant purification device
Sand grinding shaft
Special dust collection and wave changing device
5 Machining and assembly quality
Purification of coolant
Balanced sand
5.1 The following castings must be aged after rough machining: a) Bed;
b) Grinding head body (including upper cover:
) Feed box shell;
d) Slide plate,
5.2 The joint surface engraved in Table 3 shall be in accordance with the requirements of "fixed joint surface". Table 3
Horizontal axis double-disc surface seal
s) Joint surface between front bed and natural body;
The joint on the grinding head body includes:
c) Grinding wheel dresser joint surface
Considering the user's approval of the contract (agreement), two of them shall be prepared
Only horizontal axis four-disc feeding type with
Number of discs depends on the size of the machine tool
Quantity depends on the size of the machine tool
Promote horizontal axis and vertical axis according to the disc feeding type with
Only horizontal axis and vertical axis Feeding type belt
One of the parts
One of the variable rate work
According to the user's requirements, it can be designed and tested according to the user's requirements
Vertical fast double-end high-precision bed
a The combination of the body and the foot;
The combination of the base and the foot.
. The connection between the workbench and the bottom bed:
The connection between the feed coupling body and the workbench: Modification
The longitudinal force of the feed handwheel rope shall be tested according to the requirements of the "non-belt" handwheel 5.3
The reverse idle stroke of the feed handwheel shall not exceed 1/10:. 5.4
3E/T99072—2008
5.5 The main motor of the grinding head shall be dynamically balanced and calibrated with the pulley. The amplitude of vibration caused by the residual unevenness shall not be greater than 8 mm:56. The cleanliness shall be inspected according to the provisions of JB/T9877. The cleanliness of the main shaft bearing (lower shaft) of the grinding head shall be checked by visual inspection and hand feeling. There shall be no debris and dirt.
6 Machine tool idling test
6.1 Machine tool temperature rise test
The machine tool shall be idling for no less than 4 hours. When the stable temperature is reached, the temperature shall be measured at the outer surface of the main shaft bearing. The temperature shall not exceed 55℃ and the rise shall not exceed 50℃. If the temperature and temperature rise of the oil measured in the oil indicator meet the requirements of JB/IUH1S1, the error shall not exceed 100% for each feed. The cumulative error of 10 consecutive feeds shall not exceed 200% of the minimum feed amount.
6.2.2 Inspection method
Set the indicator so that the scratch head and the grinding disc (or wheel) are basically parallel, and the axis of the grinding wheel is basically parallel to the feeding direction of the grinding wheel. Feed the wheel (or grinding wheel) with the minimum feed disc, and then make corrections in reverse order. The error is calculated according to (1) and formula (2): the error of each feed.
Cumulative error of 10 feeds
Where: a,
Actual feed amount per feed:
-minimum feed disc.
6.3 Grinding head action inspection
Grinding head hydraulic transmission can be activated.
7 Machine tool load test
The machine tool is not tested before the specified power grinding, x100%
This series of machine tools only uses the load test specified in the design [spot check, the test piece specified in 915-1 or 16-1999 is used during the test, and the test is carried out according to the maximum grinding amount and feeding speed specified in the design. The machine tool should work normally. Machine tool precision inspection
1 Precision inspection is in accordance with JB/T9915 or JB/T9916. 2 T The surface roughness R of the test piece shall comply with the provisions of Table 4. The evaluation method of the roughness and its integral value in Table 4 complies with the provisions of GR/T03.
The maximum allowable value of surface roughness is
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