1 . Hardness of death
(1) S often dies
Die steel that has been pre-hardened, with a lower hardness of HB 400 or less and a production life of 500,000 times or less without quenching, is widely used.
(2) H die
The steel matrix undergoes annealing and the processing is divided into two stages: rough machining and finishing machining.
After rough machining, the die is hardened to achieve a hardness of HRC48° or higher.
It is important to maintain a tolerance of approximately 0.2 after rough machining. Failure to do so may cause deformation of the part during quenching treatment if the finishing process does not meet the part's requirements.
This type of matrix is commonly used for small-scale production, with a useful life ranging from 50 to 1 million uses.
2. Mold quality level
Level 1 Data Quality
The dies must be capable of withstanding a million or more sinking processes.
For Level 1 dies, customers demand the use of high-quality materials and accessories to produce the best dies possible.
The requirements for Level 1 data are as follows:
(1) Detailed die design, with computer drawings and material specifications.
(2) The die base must have a minimum hardness of HB280.
(3) The die core must be hardened to at least HRC50, and all rows and accessories must also be hardened.
(4) The thimble must be centered on the side of the tube.
(5) The die position must have a wear plate.
(6) The mold must have a temperature control monitor installed in the matrix or line position, depending on feasibility.
(7) It is recommended that all cooling water channels be nickel-plated (ELECTROLESS NICKEL PLATING) to prevent rust and facilitate cleaning.
(8) A positioning block must be added to the parting line.
Level 2 data quality
The dies must be capable of withstanding half a million or more sinking processes.
Level 2 dies are considered high quality and must use good materials and fixtures, as well as meet certain standards for dimensional accuracy in mold tolerances.
The requirements for Level 2 data are as follows:
(1) It is recommended to have a detailed design of the matrix.
(2) The die base must have a hardness of at least HB280.
(3) The die core must have a minimum hardness of HRC48, and all rows and accessories must undergo heat treatment.
(4) A temperature control monitor should be installed at the die or line position if possible.
(5) A positioning lock must be present at the parting line.
(6) The following requirements can be specified individually and at the time of quotation.
Level 3 Data Quality
The die must withstand at least 25,000 sinking processes, and this requirement applies to both general and production dies.
For level 3 data, the following requirements must be met:
(1) It is recommended to have a matrix design.
(2) The die base must have a minimum hardness of HB165.
(3) The die core must have a hardness of at least HB280.
(4) All other requirements, in addition to the three basic requirements above, are considered optional and may be specified as additional requirements.
Level 4 Data Quality
The die is expected to withstand approximately 10,000 sinking processes and is considered a low production die. Although there are no specific requirements, the quality of the matrix must be high and acceptable to the customer.
For level 4 data, the following requirements must be met:
(1) It is recommended to have a matrix design.
(2) The die base can be made of ordinary copper or aluminum.
(3) Die material can be aluminum or steel, subject to customer approval.
(4) All other requirements, in addition to the three basic requirements above, are considered optional and may be specified as additional requirements.
3 . D i.e. difficulty
- One level: A complex structured array with multiple row positions, multiple divisions at the top of the slope, core extraction and rotating core extraction.
- Level B: complex matrices with multiple (two to four) rows of sloping tops, two- to three-fold splitting, and core pumping.
- Level C: Simple fine-nose dies with one or two rows, sloping tops and other structured dies in general.
- Level D: simple structured dies such as large nozzle die, two plate die, no row position and no sloping top
4. Matrix size
Extra-large: matrices with a width equal to or greater than 800 mm.
Large: dies with a width between 600 and 800mm (excluding 800).
Medium: dies with a width between 350 and 600 mm (excluding 600).
Small: dies with a width of 350 mm or less.
