1 Scope
This document specifies the basic parameters of the magnesium alloy hot chamber die casting machine, technical requirements, test methods, inspection rules and signs, packaging, transport and storage.
This document applies to the production of magnesium alloy die casting hot chamber die casting machine (hereinafter referred to as "die casting machine").
2 Normative references
The contents of the following documents constitute the essential provisions of this document through the normative references in the text. Among them, the date of the reference documents, only the date of the corresponding version applicable to this document; do not note the date of the reference documents, the latest version (including all the revision of the list) applicable to this document.
GB/T191 Pictorial marking of packaging, storage and transport
GB 2893 Safety colours
GB 2894 Safety signs and guidelines for their use
GB/T 3766 General rules and safety requirements for hydraulic drive systems and their components
GB 5083 General rules for the safe and hygienic design of production equipment
3 Terminology and definitions
The terms and definitions defined in JB/T6309.1 and GB/T 21269-2018 apply to this document.
4 Basic parameters
4.1 The main parameter of the die-casting machine is the clamping force.
4.2 The basic parameters of the die-casting machine shall conform to the provisions of table 1.
5 Technical requirements
5.1 General requirements
5.1.1 The die-casting machine should have manual, semi-automatic and automatic working modes.
5.1.2 The hydraulic system and hydraulic components of the die-casting machine shall conform to the provisions of GB/T 3766 and GB/T7935. Die-casting machines should use flame retardant hydraulic media.
5.1.3 The electrical system of the die-casting machine shall conform to the provisions of GB/T 5226.1-2019.
5.1.4 The pneumatic system of the die-casting machine shall conform to the provisions of GB/T 7932.
5.1.5 The die-casting machine should have a nameplate and hydraulic, pneumatic and other system instructions for operation, lubrication, safety warnings and other signs. The content of nameplates and signs. The sign should be correct. The sign should be in accordance with the provisions of GB/T13306. Die-casting machines are allowed to set and cast out clear factory names and trademarks.
5.1.6 The die-casting machine should adopt a reliable centralized lubrication system, and should have lubrication failure detection function and sound and light alarm prompt.
5.1.7 Die-casting machine injection cylinder should have a sensor interface for process parameter testing.
5.1.8 The working fluid temperature of the hydraulic system should not exceed 55°C during continuous operation, and should be automatically alarmed when the above temperature is exceeded.
5.1.9 The cleanliness of the hydraulic system of the die-casting machine shall conform to the provisions of 6.4 of GB/T 31562-2015, and the cleanliness code shall be 22/19.
5.1.10 For casting parts with pressure-bearing channels, they should undergo a pressure-resistance test at 1.5 times the rated pressure, with a holding time of 3 min, without leakage and abnormal phenomena such as damage to parts.
5.1.11 The technical documents supplied with the die-casting machine should at least include the instruction manual, certificate of conformity, packing list, and the instruction manual should comply with the provisions of GB/T 9969.
5.1.12 The design of the frame of the die-casting machine should take into account the size of the furnace and meet the basic size requirements of the furnace.
5.1.13 The design of the die-casting machine frame should be water-cooled, and the frame should meet the burning space of the torch used for heating the nozzle body at the front of the furnace. 5.1.14 The seal of the die-casting machine frame tension cylinder should be designed for high temperature resistance.
5.1.15 The gooseneck and nozzle body heating position should have a high temperature protective cover.
5.2 Accuracy requirements
The precision of the die-casting machine shall conform to the provisions of JB/T 6309.2.
5.3 Die-casting machine pressure injection performance
The maximum empty pressure injection speed should not be less than 6 m/s.
5.4 Accumulator
5.4.1 The pressure drop of the accumulator should not exceed 10% of the working pressure for each press injection.
5.4.2 The accumulator system shall be equipped with a device to release or cut off the liquid pressure of the accumulator, and the accumulator shall be permitted to be filled with nitrogen only.
5.5 Noise of the machine
The sound pressure level of the noise shall not be greater than 85 dB(A) under air-running conditions.
5.6 Safety requirements
5.6.1 The safety performance of the die-casting machine shall conform to the provisions of GB 20906-2007.
5.6.2 The safety and hygiene design shall comply with the provisions of GB 5083.
5.6.3 The safety colours and safety signs of the die-casting machine should conform to the provisions of GB 2893,GB 2894.
5.7 Melting furnace safety design requirements
5.7.1 The furnace design should be equipped with a reliable protective gas supply system with flow meters, flow control valves and flow switches.
5.7.2: The furnace lid should be configured so that the protective gas is evenly distributed on the surface of the magnesium alloy, the protective gas should be able to form a protective layer to prevent oxidation of the magnesium alloy liquid.
5.7.3 The joint between the furnace body and the furnace cover shall be designed in such a way that the magnesium alloy liquid and the protective gas do not escape.
5.7.4 The control system shall be equipped with a real-time cyanogenic magnesium leakage detection and alarm device.
5.7.5 The control system shall be equipped with an emergency switch, which shall cut off the main electrical circuit of the furnace.
5.7.6 The input and output protective gas pressure is lower than the design value, there should be automatic sound and light alarm function.
5.7.7 When the temperature of the melt is greater than or equal to 350℃, it should have the function of automatic protection gas input; when the temperature is lower than 350℃, it should have the function of automatic protection gas input stop.
5.7.8 The leakage of liquid from the worm shall be automatically detected, alarmed and automatically cut off the power supply and automatically connect the protective gas function in the furnace chamber. 5.7.9 The furnace shall have a mechanical locking device if it has the function of moving back and forth.
5.7.10 Furnace temperature abnormalities should be sound and light alarm function.
5.7.11 The maximum safety level limit should be available.
5.8 Requirements for heat-resistant parts
The heat-resistant parts such as gooseneck pot and injection head are the wearing parts of the magnesium alloy hot chamber die-casting machine, the manufacturer should provide drawings and relevant technical requirements, and manufacture according to the requirements.
5.9 Complete sets
5.9.1 The scope of the complete set of die-casting machine includes: a list of spare parts for various sealing elements, special tools and accessories.
5.9.2 According to the user's needs, the manufacturer can be provided with a complete set of presses for cutting the edges of die castings, pouring devices, picking devices, spraying devices, hydraulic core extraction devices, clamping force display devices and die casting process parameter testing devices.
5.10 Air transport requirements
The air-transfer shall comply with the requirements of JB/T 6309.3-2015 - 3.4.
6 Test methods
6.1 General project testing
6.1.1 When checking the parameters and dimensions, the parameters expressed by linear dimensions are generally measured directly by the corresponding measuring tools, or by special testing devices.
6.1.2 The clamping force is detected with a special clamping force detection device.
6.1.3 The time of an empty cycle is measured using a stopwatch, the reading of which should be taken from the moment the actuator starts to move up to the moment it stops. It can also be tested with a timing instrument whose accuracy is not less than that of a stopwatch.
6.1.4 Hydraulic systems and hydraulic components should be tested according to the provisions of GB/T 3766 and GB/T 7935.
6.1.5 The cleanliness of the hydraulic system shall be tested according to the provisions of GB/T 31562-2015.
6.1.6 The pneumatic system should be tested according to the provisions of GB/T 7932.
6.1.7 The centralised lubrication system is inspected visually.
6.1.8 The temperature of the die casting working oil can be read directly from the tank oil temperature dipstick after 4 h of operation or measured with a digital temperature measuring instrument.
6.2 Accuracy testing
The accuracy of the die-casting machine should be tested in accordance with JB/T 6309.2.
6.3 Main pressure injection performance testing
6.3.1 Testing instruments
6.4 Accumulator pressure drop detection
The pressure drop of the accumulator is determined by the pressure of the accumulator supply port for each pressure injection, and the measurement point should be close to the supply port.
6.5 Detection of the noise of the machine
Noise should be tested in accordance with GB/T 25371.
6.6 Safety testing
Safety should be tested in accordance with the requirements of Chapter 6 of GB 20906-2007.
6.7 Electrical system testing
6.7.1 Visual inspection of the earthing device and the protective earthing symbol (or PE) is used.
6.7.2 Test according to the requirements of 18.2 in GB/T 5226.1-2019, the continuity of the protective earthing circuit shall comply with its provisions. 6.7.3 Test according to the requirements of 18.3 in GB/T 5226.1-2019, the insulation resistance shall comply with its provisions.
6.7.4 Testing according to the requirements of 18.4 in GB/T 5226.1-2019 for voltage resistance shall comply with its provisions.
6.8 Energy consumption test
The energy consumption of the die-casting machine shall be tested in accordance with the provisions of GB/T 39962-2021.
6.9 Inspection of the appearance of the whole machine
The inspection of the appearance of the machine is carried out by visual inspection.
7 Inspection rules
7.1 Factory inspection
7.1.1 Each die-casting machine shall be inspected and qualified before leaving the factory and shall be accompanied by a product certificate before leaving the factory.
The factory inspection items are as follows:
a) Accuracy;
b) the stroke of the die mounting plate, the inner dimension between the pull bar, the die thickness, the ejector stroke of the hydraulic ejector;
c) The contents of 5.1, 5.2, 5.3, 5.5, 5.6, 5.10 and 5.13;
d) When a total of 30 units are produced, 1 unit will be randomly selected for pressure injection performance and cleanliness testing.
7.1.2 All items inspected shall be qualified.
7.2 Type inspection
7.2.1 die-casting machine has one of the following conditions, should be type inspection:
(a) new product trial or old product transfer production of the prototype identification
b) products in the design, process, materials to make major changes;
c) the product has been discontinued for more than two years, when resuming production;
d) the national market regulator to carry out the type test requirements.
7.2.2 type test the number of prototypes, according to the production batch to determine. Batch within 10 units, a random sample of l; batch greater than 10 units, a random sample of 2 units.
7.2.3 type test should be Chapter 4 and Chapter 5 of all projects to test, the project should be all qualified.
8 signs, packaging, transport and storage
8.1 die-casting machine parts and spare parts of the exposed processing surface of the seal antirust should be consistent with the provisions of JB/T 8356.
8.2 Die-casting machine packaging, marking, storage should be consistent with GB/T 191, GB 2894, GB/T13384 of the relevant provisions.
8.3 Packaging, storage and transportation diagrams should be in line with the provisions of railway, road, waterway transport and mechanized loading.
1 Scope
2 Normative references
3 Terminology and definitions
The terms and definitions defined in JB/T6309.1 and GB/T 21269-2018 apply to this document.
4 Basic parameters
5 Technical requirements
6 Test methods
7 Inspection rules
8 signs, packaging, transport and storage
