GB/T 39957-2021 (GB/T39957-2021, GBT 39957-2021, GBT39957-2021) & related versions
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High pressure metal die casting units -- Technical requirements
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GB/T 39957-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.120.30
CCS J 61
High pressure metal die casting units - Technical
requirements
ISSUED ON: MARCH 09, 2021
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Technical requirements ... 5
5 Idle running requirements ... 11
6 Load running requirements ... 12
7 Inspection methods ... 12
8 Inspection rules ... 13
9 Marking, packaging, transportation and storage ... 13
High pressure metal die casting units - Technical
requirements
1 Scope
This document specifies the technical requirements, operation requirements,
inspection methods, inspection rules, marking, packaging, transportation and
storage of high pressure metal die casting units.
This document applies to high pressure metal die casting units, including die
casting machine and its auxiliary devices, such as heat preservation and
pouring device, picking and conveying device, spraying device, mold
temperature control device, cleaning and repairing device, inserting device,
detection device, system safety device, collection, discharge, dust removal
device, vacuum device, marking device, integrated control device, but not
limited to the above devices. It applies to low-pressure casting, squeeze casting
and other casting units as reference.
2 Normative references
The contents of the following documents constitute the indispensable clauses
of this document through normative references in the text. For dated references,
only the version corresponding to that date is applicable to this document; for
undated references, the latest version (including all amendments) is applicable
to this document.
GB/T 3766, Hydraulic fluid power - General rules and safety requirements
for systems and their components
GB/T 5226.1, Electrical safety of machinery - Electrical equipment of
machines - Part 1: General requirements
GB/T 7932, Pneumatic fluid power - General rules and safety requirements
for systems and their components
GB/T 7935, Hydraulic fluid power - General requirements for hydraulic
components
GB/T 9969, General principles for preparation of instructions for use of
industrial products
GB 20906, Safety requirements for high pressure metal diecasting units
4.1.6 The working fluid medium of the high pressure metal die casting unit shall
meet the requirements of the technical documents; the cleanliness of the
hydraulic system of the die casting unit shall meet the requirements of 6.4 in
GB/T 31562-2015; the cleanliness code is 22/19.
4.1.7 The regulating valve stem of each control mechanism of the high pressure
metal die casting unit shall be flexible, reliable and positioned correctly after
assembly.
4.1.8 The safety of the high pressure metal die casting unit shall meet the
requirements of GB 20906.
4.1.9 There shall be a safety interlock function between the die casting machine
and the picking, spraying, heat preservation and pouring devices, so as to
prevent mechanical damage which is caused by malfunction.
4.1.10 In abnormal situations such as power failure, each device shall have a
mechanical anti-drop function.
4.1.11 The technical documents that are provided with the high pressure metal
die casting unit shall at least include operation instruction manual, certificate of
conformity, and packing list. The operation instruction manual shall meet the
requirements of GB/T 9969.
4.2 Die casting machine
4.2.1 The die casting machine shall have manual, semi-automatic and
automatic working modes.
4.2.2 The cold chamber die casting machine shall meet the requirements of
GB/T 21269.
4.2.3 The hot-chamber die casting machine shall meet the requirements of JB/T
6309.3.
4.3 Heat preservation and pouring device
4.3.1 The melting furnace shall meet the requirements of JB/T 13238.
4.3.2 The holding furnace shall meet the working range of the die casting
machine and the heat preservation and pouring device.
4.3.3 The holding furnace shall have the operating parameter information
transmission function, to feed back information such as temperature to the
integrated control system.
4.3.4 The heat preservation and pouring device shall meet the requirements of
JB/T 11554.2.
shall return to the original position of the robot after completing a spraying cycle
instead of manually.
4.6 Mold temperature control device
4.6.1 The mold temperature control device shall have a medium recovery
function.
4.6.2 The mold temperature control device shall have heating, cooling and
constant-temperature functions.
4.6.3 The working pressure of the mold temperature control device shall be less
than or equal to 1.0 MPa.
4.6.4 The temperature of the water circulation mold temperature control device
shall be less than or equal to 180 °C.
4.6.5 The temperature of the oil circulation mold temperature control device
shall be less than or equal to 320 °C.
4.6.6 The temperature control accuracy of the mold temperature control device
should be ±1 °C.
4.7 Cleaning and repairing device
4.7.1 The cleaning and repairing device shall not cause damage to the die
casting body.
4.7.2 The cycle period of the cleaning and repairing device shall be less than
the die casting cycle period.
4.7.3 The cleaning and repairing device shall have a debris recovery function.
4.7.4 The cleaning and repairing device shall be equipped with a waste
container underneath.
4.8 Inserting device
4.8.1 The inserting device shall have manual, semi-automatic and automatic
feeding functions.
4.8.2 The inserting device shall have the detection function of positioning in
place.
4.8.3 Complete the fixed-point transmission of the insert; the repeated
positioning accuracy and temperature of the insert shall meet the requirements
of the die casting process.
a) Ordinary vacuum die casting. The cavity vacuum degree shall be
controlled at 0.01 MPa ~ 0.02 MPa; the die castings shall not be heat
treated or welded.
b) High vacuum die casting. The cavity vacuum degree shall be controlled at
0.005 MPa ~ 0.01 MPa; the die castings can be heat treated or welded,
but they shall not be used in the production of structural parts.
c) Ultra-vacuum die casting. The cavity vacuum degree shall be controlled to
less than 0.005 MPa; the die castings can be heat-treated or welded, and
can be used in the production of structural parts.
4.13 Marking device
4.13.1 The marking device shall have an editing function to edit the required
codes.
4.13.2 The marking device shall ensure one code per casting.
4.13.3 The bar code, text, pattern and other marks on the surface of the casting
shall be clearly visible.
4.13.4 The marking device shall have the operating parameter information
transmission function, to feed back the coding information to the integrated
control system.
4.14 Integrated control device
4.14.1 The integrated control device of the high pressure metal die casting unit
shall be compatible and adopt a distributed structure in the form of a fieldbus or
other open systems.
4.14.2 The integrated control device of the high pressure metal die casting unit
and various auxiliary devices shall be able to realize data control and
transmission through the communication interface, using an open
communication protocol.
4.14.3 The integrated control device of the high pressure metal die casting unit
shall have basic functions such as fault display and alarm, safety linkage and
control, data setting, status display, data traceability.
4.14.4 The data storage space of the high pressure metal die casting unit shall
be greater than 1Gbyte or the external large-capacity storage, and shall have
data recording and traceability functions.
4.14.5 The control device of the high pressure metal die casting unit shall have
high safety, high reliability and maintainability; there shall be action interlocking
5.7 The time of one empty cycle of the high pressure metal die casting unit shall
not be greater than the sum of the shortest cycle time that is specified by the
device.
6 Load running requirements
6.1 The high pressure metal die casting unit shall be subjected to an idle
running test before load running.
6.2 Under normal operating conditions, carry out the physical die-casting test;
during the test, various parameters shall meet the design requirements.
6.3 The action of the movement mechanism of each device shall be flexible,
stable, accurate and coordinated.
7 Inspection methods
7.1 The cold chamber die casting machine shall be inspected in compliance
with the provisions of GB/T 21269.
7.2 The hot-chamber die casting machine shall be inspected in compliance with
the provisions of JB/T 6309.3.
7.3 The spraying device shall be inspected in compliance with the provisions of
JB/T 12284.2.
7.4 An empty cycle time shall be tested with a stopwatch; its reading is the time
from the start of the high pressure metal die casting unit's mold closing action
to the end of the spraying work.
7.5 The noise shall be inspected in accordance with the provisions of GB/T
25371.
7.6 The feeding device shall be inspected in compliance with the provisions of
JB/T 11554.2.
7.7 The cleanliness of the hydraulic system of the high pressure metal die
casting unit shall be tested in accordance with the provisions of GB/T 31562-
2015.
7.8 Determination of the vacuum valve closing response time:
a) Oscilloscope: time scale of 0.000 1 s;
b) Connect the vacuum valve closing signal and the completion signal of the
vacuum valve closing action to the oscilloscope;
......
| Standard ID | GB/T 39957-2021 (GB/T39957-2021) | | Description (Translated English) | High pressure metal die casting units -- Technical requirements | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J61 | | Classification of International Standard | 25.120.30 | | Word Count Estimation | 10,197 | | Date of Issue | 2021-03-09 | | Date of Implementation | 2021-10-01 | | Drafting Organization | Shenzhen Lingwei Technology Co., Ltd., Guangdong Hongtu Nantong Die-casting Co., Ltd., Shenzhen Lanhai Huateng Technology Co., Ltd., Shenzhen Dingzhengxin Technology Co., Ltd., Haixi (Fujian) Branch of the Chinese Academy of Mechanical Sciences Co., Ltd., Foshan Xiong New Die Casting Co., Ltd., Jiafeng Industrial Technology (Huizhou) Co., Ltd., Dongguan Jiejin Machinery Equipment Co., Ltd., Ningbo Lijin Technology Co., Ltd., Zhejiang Wanfeng Technology Development Co., Ltd., Suzhou Sanji Casting Equipment Co., Ltd., Guangdong Wen Can Die Casting Co., Ltd., Foshan Nanhai Jin Die Casting Automation Co., Ltd., Jiangsu Minglida Technology Co., Ltd., Yixiang Intelligent Equipment (Shenzhen) Co., Ltd., Zhuhai Runxingtai Electric Co., Ltd., Guangdong Huazhong University of Science and Technology Industrial Technology Research Institute, Intelligent Equipment of Zhuxi Zhigu, Pengjiang District, Jiangmen City | | Administrative Organization | National Foundry Machinery Standardization Technical Committee (SAC/TC 186) | | Regulation (derived from) | National Standard Announcement No. 3 of 2021 | | Proposing organization | China Machinery Industry Federation | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
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