CN103056234A - Preparation process for punching female dies - Google Patents

Abstract

The invention discloses a preparation process for punching female dies. The preparation process is characterized by comprising casting of a female die bar blank, wherein the female die bar blank comprises, by mass, 0.10% to 0.25% of C, at most 1.00% of Si, at most 2.00% of Mn, 0.60% to 1.50% of Ni, 1.00% to 2.50% of Cr, 0.10% to 0.20% of Mo, 0.03% to 0.15% of V, 0.50% to 2.00% of Cu, at most 0.015% of S, at most 0.12% of Al, at most 0.06% of N, at most 0.005% of O, and the balance Fe and inevitable impurities. According to the preparation process, a process end is reserved at a position of a small plate with the thin die wall in a machining process, so that deformation of a punch in the machining process is prevented or reduced.

Description

A kind of preparation technology of die cutting die die

Technical field

The present invention relates to a kind of mould preparation technology, particularly relate to a kind of preparation technology of die cutting die die.

Background technology

Existing mold production process is generally as follows: car → mill mark → numerical control marking → brill → heat treatment → corase grind → slow wire feeding, line cutting → electric spark → slow wire feeding → electric spark → bedding-in, the leading portion operation has respectively car, bores, mills and grinds, back segment operation electric spark, numerical control mill and fast, slow line cutting, grinding etc.After finishing complicated curved surface and aperture operation, the depth of parallelism of face shape requires to reach 10 ~ 5 μ m, and the required precision of aperture is controlled to be 1 ~ 5 μ m, to guarantee the quality of mould.Be the high chromium cold work tool steel of SLD high abrasion at used drift material; heat treatment take application of vacuum when main; to some mould; with the mould such as the undershoot under three on the flange type one; conventional structure is thinner in platelet position wall ratio, in the cutting on line process because the impact that is subjected to effect of stress often can have the phenomenon of distortion, thereby cause die deformation to be scrapped; have a strong impact on the efficient of production, also cause the waste of resource.

Summary of the invention

In order to overcome the deficiencies in the prior art, the present invention proposes a kind of preparation technology of die cutting die die, in process, keep a technique head in the thinner platelet position of mold wall thickness, to avoid or to alleviate the distortion of drift in process.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of preparation technology of die cutting die die, it comprises following processing step:

1) casting of die bar blank: the component of the mass percent of die bar blank forms: 0.10%～0.25% C, 1.00% Si at the most, 2.00% Mn at the most, 0.60%～1.50% Ni, Cr greater than 1.00%～at the most 2.50%, 0.10%～0.20% Mo, 0.03%～0.15% V, 0.50%～2.00% Cu, at the most 0.015% S, at the most 0.12% Al, at the most 0.06% N, the Fe of at the most 0.005% O, and surplus and inevitable impurity;

2) blanking: the die bar of selecting to be of a size of φ 100*147mm is processed;

3) turner order: bar is carried out the turner order, process by drawing the profile of die, and to remain with thickness at die φ 80*5 place outer wall be that 3 ~ 4mm, width are the technique head of 2 ~ 5mm;

4) line: adopt by drawing underlining Working position and shape on the mould of scoring tool;

5) boring: adopt drilling machine to leave fabrication hole at mould by the underlining of previous step;

6) heat treatment: mould is heat-treated Quenching Treatment: the valve plate blank after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-750 ℃ temperature range and is incubated 2h to not being higher than after 100 ℃, afterwards water-cooled; Make the hardness of mould reach Rockwell hardness 57-59;

7) mill: to each surfacing of mould of finishing cutting size to drawing requirement;

8) electric spark: the end face each several part by the spark machined mold and punching head is to the size of drawing requirement;

9) grind: grind on the surface to mould, makes the roughness of die surface less than 0.1mm, finishes processing.

The invention has the beneficial effects as follows: the lower stamping die that adopts this technological process to process, owing in the turner order of beginning, kept technique head, the thinner platelet position of wall thickness is in the process of following process has avoided moderate finite deformation, and the concentricity that can make the mould that processes be controlled at less than 0.015mm among a small circle in, greatly improved the machining accuracy of mould, avoided mould and in process, scrapped the wasting phenomenon that causes because of distortion.

  

The specific embodiment

The present invention is further described below in conjunction with embodiment.

A kind of preparation technology of die cutting die die, it comprises following processing step:

1) casting of die bar blank: the component of the mass percent of die bar blank forms: 0.10%～0.25% C, 1.00% Si at the most, 2.00% Mn at the most, 0.60%～1.50% Ni, Cr greater than 1.00%～at the most 2.50%, 0.10%～0.20% Mo, 0.03%～0.15% V, 0.50%～2.00% Cu, at the most 0.015% S, at the most 0.12% Al, at the most 0.06% N, the Fe of at the most 0.005% O, and surplus and inevitable impurity;

2) blanking: the die bar of selecting to be of a size of φ 100*147mm is processed;

3) turner order: bar is carried out the turner order, process by drawing the profile of die, and to remain with thickness at die φ 80*5 place outer wall be that 3 ~ 4mm, width are the technique head of 2 ~ 5mm;

4) line: adopt by drawing underlining Working position and shape on the mould of scoring tool;

5) boring: adopt drilling machine to leave fabrication hole at mould by the underlining of previous step;

6) heat treatment: mould is heat-treated Quenching Treatment: the valve plate blank after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-750 ℃ temperature range and is incubated 2h to not being higher than after 100 ℃, afterwards water-cooled; Make the hardness of mould reach Rockwell hardness 57-59;

7) mill: to each surfacing of mould of finishing cutting size to drawing requirement;

8) electric spark: the end face each several part by the spark machined mold and punching head is to the size of drawing requirement;

9) grind: grind on the surface to mould, makes the roughness of die surface less than 0.1mm, finishes processing.

Of the present invention PowerPerformance detection data is as follows:

Hardness HRC:54-57

Bending strength: 2100-2300Mpa

Impact flexibility: 60-64J/cm2

Compression strength: 1700-1900 Mpa

Wearability: reach D2.

Claims (1)

1. the preparation technology of a die cutting die die, it is characterized in that: it comprises following processing step:

1) casting of die bar blank: the component of the mass percent of die bar blank forms: 0.10%～0.25% C, 1.00% Si at the most, 2.00% Mn at the most, 0.60%～1.50% Ni, Cr greater than 1.00%～at the most 2.50%, 0.10%～0.20% Mo, 0.03%～0.15% V, 0.50%～2.00% Cu, at the most 0.015% S, at the most 0.12% Al, at the most 0.06% N, the Fe of at the most 0.005% O, and surplus and inevitable impurity;

2) blanking: the die bar of selecting to be of a size of φ 100*147mm is processed;

3) turner order: bar is carried out the turner order, process by drawing the profile of die, and to remain with thickness at die φ 80*5 place outer wall be that 3 ~ 4mm, width are the technique head of 2 ~ 5mm;

4) line: adopt by drawing underlining Working position and shape on the mould of scoring tool;

5) boring: adopt drilling machine to leave fabrication hole at mould by the underlining of previous step;

6) heat treatment: mould is heat-treated Quenching Treatment: the valve plate blank after forging through step b is heated to 980 ℃ and be incubated 1-2h, and oil cooling does not reheat to 680 ℃-750 ℃ temperature range and is incubated 2h to not being higher than after 100 ℃, afterwards water-cooled; Make the hardness of mould reach Rockwell hardness 57-59;

7) mill: to each surfacing of mould of finishing cutting size to drawing requirement;

8) electric spark: the end face each several part by the spark machined mold and punching head is to the size of drawing requirement;

9) grind: grind on the surface to mould, makes the roughness of die surface less than 0.1mm, finishes processing.