JB/T 1431-1999 JB/T 1431-1999 Accuracy of top box shock-pressing, top box shock-solid and off-box shock-pressing molding machines JB/T1431-1999 Standard download decompression password: www.bzxz.net

ICS77.180
Machinery Industry Standard of the People's Republic of China
JB/T1431-1999
Precision of top-box vibration-compression type, top-box vibration-solid type and
separate-box vibration-compression type molding machines
Published on May 14, 1999
State Bureau of Machinery Industry
Implemented on January 1, 2000
JB/T1431-1999
This standard is a revision of B1431-86 "Precision of top-box vibration-compression type, top-box vibration-solid type and separate-box vibration-compression type molding machines" (not equivalent to the former Soviet Union TOCT15066-78 "Precision of molding machines"), and only editorial changes were made according to relevant regulations during the revision, and the technical content was not changed.
This standard replaces JB1431-86 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Foundry Machinery Standardization. The responsible drafting unit of this standard is Baoding Foundry Machinery Factory. The main drafter of this standard is Zhu Keqin.
This standard was first issued in July 1986.
Machinery Industry Standard of the People's Republic of China
Precision of top box shock-pressing, top box shock-solid and
separate box shock-pressing molding machines
JB/T1431-1999
Replaces JB1431-86
This standard specifies the requirements and inspection methods for the geometric accuracy inspection of top box shock-pressing, top box shock-solid and separate box shock-pressing molding machines. This standard applies to top box shock-pressing, top box shock-solid and separate box shock-pressing molding machines (hereinafter referred to as machines). 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T17421.1-1998 General Rules for Machine Tool Inspection Part 1: Geometric Accuracy of Machine Tools under No-Load or Finishing Conditions 3 General Requirements
3.1 When using this standard, reference should be made to the relevant provisions of GB 17421.1. 3.2 The accuracy inspection of the machine should be carried out during the idling test and after the load test. 3.3 When conducting the accuracy inspection, it is allowed to remove the guards and guards. Other detachable devices that affect the measurement accuracy and safety should be removed. 3.4 The accuracy of the flat ruler, square ruler, standard block, and special dial indicator seat used for measurement should comply with the requirements for Class B measuring tools in Appendix A of GB/T17421.1-1998.
4 Inspection
Approved by the State Machinery Industry Bureau on May 14, 1999, and implemented on January 1, 2000
Pre-adjustment inspection
4.2 Geometric accuracy inspection
Inspection items
Machine leveling
Inspection items
The flatness of the workbench surface is 0.1 on a length of 1000mmbzxZ.net
(only the middle is allowed
Inspection tools
Level
Inspection tools
Equal height gauge blocks
Adjustable gauge blocks
Dial indicator
Inspection method
Place a straightedge on the workbench, then place a spirit level on the straightedge, and measure at two positions as shown in the figure. The readings of the spirit level must not exceed the specified value. Inspection method
Select three points a, b and c on the workbench surface as references. Place three equal-height blocks on these three points. Place a straightedge on points a and c, and place an adjustable gauge block at a point on the plane to be inspected so that it contacts the lower surface of the straightedge. At this time, the upper surfaces of a, b, c and e gauge blocks are all in the same plane. Place a straightedge on points b and e, and place an adjustable gauge block at point d so that it contacts the lower surface of the straightedge. Place the straightedge on points a and d, b and c, a and b, d and c, a and c, b and d, use a gauge block or dial indicator to measure the distance between the flat ruler and the inspected plane at any point under the flat ruler. The difference between the maximum and minimum distances is the flatness error of the inspected plane (the deflection of the flat ruler should be considered when necessary)
JB/T1431-
Inspection items
Parallelism between the pressure head sand pressing plate
and the workbench table
Parallelism between the workbench
table and the top
surface of the top box plate or the top
surface of the top box frame or the top
surface of the demolding frame before demolding
Within the demolding stroke
range, the workbench
For the horizontal displacement of the top box frame or
mold frame
, it is 0.1
on the length of 500mm
and 0.15
on the length of 100mm
. Inspection tools
dial indicator
magnetic table base
magnetic table base
dial indicator
square
magnetic table base
dial indicator
inspection method
place a wooden block on the workbench, as shown in the figure. Compact under air pressure of 147~196kPa. Place the magnetic table base with a dial indicator on the workbench. On the workbench surface, the dial indicator's probe is against the plane of the pressure head sand pressing plate, and then the dial indicator seat is moved in the longitudinal and transverse directions for measurement. The maximum value of the first dial indicator is the parallelism error. Raise the demolding frame or top box frame or top box plate to the starting position for demolding, place a flat ruler on the top box plate or top box frame, and place the dial indicator stand on the workbench. The dial indicator's probe is against the surface of the flat ruler, and the dial indicator seat is moved in the direction of the top box plate or top box frame for measurement. Place a right-angle ruler on the workbench surface, and the dial indicator stand on the top box frame or demolding frame. The dial indicator's probe is against the surface of the right-angle ruler. The position of the probe is equivalent to the lowest point of the model. Raise the top box frame or demolding frame, and its stroke is the maximum demolding stroke. , as shown in the figure, the measurement is carried out in the longitudinal and transverse directions JB/T1431-
1 ejector, 2-beam, 3-screw, 4-set
5 one hundredth indicator, 6-square, 7-connecting rod
8 rotary axis, 9 load
Inspection items
Within the range of die-pulling stroke, the horizontal displacement of the workbench surface relative to the die-pulling frame
or the leaking die frame
The upper surface height of the ejector plate or the die-pulling frame at the start position of die-pulling
Double-cylinder die-pulling machine
The left and right beams of the structure lift
The synchronization of the rise is 0.15 on the length of 100mm. The workbench is below 800mm and is 0.26; the workbench is above 800mm. Inspection tools: square ruler, magnetic base, dial indicator, magnetic base, dial indicator, synchronous detection device, dial indicator, inspection method, place the square ruler on the die-pulling frame or the die-leaking frame, and the dial indicator stand on the workbench. The probe of the dial indicator is on the top of the square ruler. Surface, the position of the probe is equivalent to the highest point of the model, and the workbench is lowered. Its stroke is the maximum demolding stroke, as shown in the figure, and measurements are made in the longitudinal and transverse directions.
Raise the two top box plates or demolding frames to the starting position for demolding, place a flat ruler on them, and place the dial indicator stand on the workbench table. The probe of the dial indicator is on the upper surface of the flat ruler on the top surface of the top box plate or the demolding frame, and the dial indicator seat is moved to measure the height difference between the two top box plates or the demolding frames.
Place a synchronous detection device on the machine demolding ejector rod 1, and the probe of the dial indicator 5 is on the flat seat of the connecting rod 7. The dial indicator is pre-pressed so that the pointer points to 2~3mm, and the chassis of the dial indicator is aligned at 0, and then the demolding is carried out. The reading of the dial gauge multiplied by
two is the synchronization error
JB/T1431-
Mechanical Industry Standard
Precision of top box shock-pressure type, top box shock-solid type and
off-box shock-pressure type molding machines
JB/T14311999
Published and distributed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, Postal Code 10044)*
1/16 Sheet 1/2
2 Number of words 10,000
Format 880×1230
First edition in July 1999
First printing in July 1999
Price 5.00 yuan
Print run 1—500
99-269
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