阅读说明：本技术 一种冲压式模具生产的制造工艺 (manufacturing process for producing stamping type die ) 是由 郭雷 于 2018-07-19 设计创作，主要内容包括：本发明公开了一种冲压式模具生产的制造工艺,包括以下步骤：S1、称取锌基合金粉末和硬质合金粉末,得到毛坯；S2、将毛坯加热冷却至室温,并将其再次加热在冷却液中快速冷却；S3、将毛坯加热在冷却液中快速冷却至室温,并继续加热保温12h后；S4、将毛坯放置在液氮中；S5、将毛坯在机床上进行加工得到模具、模芯和模具零件,并装配得到初成品；S6、向初成品的缝隙中添加粘结剂,取出待其自然冷却后得到冲压式模具。本发明通过对加热和冷却处理,可以得到单一均匀的奥氏体组织,还可以降低冲压式模具的塑性和冲击韧度,减少工件的变形和开裂,调整硬度和稳定工件尺寸,冲压式模具内部结构更加紧密,能够承受更强的外部压力。(The invention discloses a manufacturing process for producing stamping dies, which comprises the following steps of S1, weighing zinc-based alloy powder and hard alloy powder to obtain blanks, S2, heating and cooling the blanks to room temperature, reheating the blanks in cooling liquid and rapidly cooling the blanks, S3, heating the blanks in the cooling liquid and rapidly cooling the blanks to room temperature, continuing to heat and preserve heat for 12 hours, S4, placing the blanks in liquid nitrogen, S5, processing the blanks on a machine tool to obtain dies, die cores and die parts, assembling the dies to obtain a primary finished product, S6, adding a binder into gaps of the primary finished product, taking out the primary finished product and naturally cooling the primary finished product to obtain the stamping dies.)

1, manufacturing process for producing stamping type dies, which is characterized by comprising the following steps:

s1, manufacturing a three-dimensional drawing of the die according to the use purpose of the stamping die, calculating the size of materials required by the die according to the three-dimensional drawing of the die, weighing zinc-based alloy powder and hard alloy powder, uniformly mixing and heating the zinc-based alloy powder and the hard alloy powder to a molten state, and pressing and cooling to form to obtain a blank;

s2, heating the blank to 885-900 ℃, preserving heat for the th time, cooling to room temperature, heating the blank again to 885-900 ℃, preserving heat for the second time, and rapidly cooling in cooling liquid;

s3, heating the blank to 650 ℃ at 620-650 ℃, rapidly cooling the blank to room temperature in cooling liquid after the third heat preservation, continuously heating the blank to 80 ℃, and slowly cooling the blank at room temperature after the heat preservation is carried out for 12 hours;

s4, placing the cooled blank in liquid nitrogen for 45-60 min, taking out, and cooling at room temperature for later use;

s5, performing rough machining, finish machining and finishing on the blank on a machine tool to obtain a die, a die core and a die part, assembling the die, the die core and the die part according to a three-dimensional graph of the die, and punching by a single-point pressure punching machine after the assembly is completed to obtain a primary finished product;

and S6, adding a binder into the gap of the primary finished product, placing the gap in high temperature, taking out the gap, and naturally cooling to obtain the stamping die.

2. The manufacturing process for producing the stamping dies as claimed in claim 1, wherein the three-dimensional pattern of the dies is divided into an outer cylindrical die and an inner structure die, and the cooling speed for cooling to room temperature is 30-40 ℃/min.

3. The manufacturing process of stamping dies for production, according to claim 1, wherein the heat-preservation time of th heat-preservation time is 2-3 h, the heat-preservation time of the second heat-preservation time is 1-2 h, and the heat-preservation time of the third heat-preservation time is 60 min.

4. The process of manufacturing stamping dies according to claim 1, wherein the coolant includes triethanolamine 14%, sodium stearate 9%, ethanol 12%, ethylene glycol 2.2%, polyol phosphate 0.8%, and distilled water 62%.

5. The manufacturing process for producing stamping dies as claimed in claim 1, wherein the rough machining is machining by machine tool and the finish machining is grinding and polishing.

6. The kinds of punching dies producing manufacturing process according to claim 1, wherein the binder comprises the following raw materials, by weight, 38% of epoxy resin, 26% of urethane tetra-functional epoxy resin, 12% of sodium stearate, 3% of talc, 5% of n-butanol and 26% of distilled water.

Technical Field

The invention relates to the technical field of die production, in particular to a manufacturing process for producing stamping dies.

Background

With the development of Chinese economy, the machining industry has been rapidly developed, in the machining industry, all the processes of changing the shape, size, position, property and the like of a production object into a finished product or a semi-finished product are called as process, the die manufacturing technology is rapidly developed and becomes an important component of the modern manufacturing technology, the modern die manufacturing technology is developing towards the direction of accelerating information drive, improving manufacturing flexibility, agile manufacturing and systematic integration, the die production process and the production process of other industrial products refer to the whole process of starting from raw materials and converting the die into a finished product through processing, the die has various types, each type of die has different structures, requirements and purposes and has a specific production process.

Disclosure of Invention

The invention aims to solve the defect that cracking or damage often occurs when a stamping die is subjected to large impact force in the using process in the prior art, and provides manufacturing processes for producing the stamping die.

A manufacturing process for producing a stamping die, comprising the steps of:

s1, manufacturing a three-dimensional drawing of the die according to the use purpose of the stamping die, calculating the size of materials required by the die according to the three-dimensional drawing of the die, weighing zinc-based alloy powder and hard alloy powder, uniformly mixing and heating the zinc-based alloy powder and the hard alloy powder to a molten state, and pressing and cooling to form to obtain a blank;

s2, heating the blank to 885-900 ℃, preserving heat for the th time, cooling to room temperature, heating the blank again to 885-900 ℃, preserving heat for the second time, and rapidly cooling in cooling liquid;

s3, heating the blank to 650 ℃ at 620-650 ℃, rapidly cooling the blank to room temperature in cooling liquid after the third heat preservation, continuously heating the blank to 80 ℃, and slowly cooling the blank at room temperature after the heat preservation is carried out for 12 hours;

s4, placing the cooled blank in liquid nitrogen for 45-60 min, taking out, and cooling at room temperature for later use;

s5, performing rough machining, finish machining and finishing on the blank on a machine tool to obtain a die, a die core and a die part, assembling the die, the die core and the die part according to a three-dimensional graph of the die, and punching by a single-point pressure punching machine after the assembly is completed to obtain a primary finished product;

and S6, adding a binder into the gap of the primary finished product, placing the gap in high temperature, taking out the gap, and naturally cooling to obtain the stamping die.

Preferably, the three-dimensional graph of the die is divided into an excircle die and an upper part and a lower part of an internal structure die, and the cooling speed of cooling to room temperature is 30-40 ℃/min.

Preferably, the heat preservation time of the th heat preservation is 2h-3h, the heat preservation time of the second heat preservation is 1h-2h, and the heat preservation time of the third heat preservation is 60 min.

Preferably, the cooling liquid comprises the following raw materials in percentage by weight: 14% of triethanolamine, 9% of sodium stearate, 12% of ethanol, 2.2% of ethylene glycol, 0.8% of polyol phosphate and 62% of distilled water.

Preferably, the rough machining method is cutting by a machine tool, and the finish machining method is grinding and polishing.

Preferably, the binder comprises the following raw materials in percentage by weight: 38% of epoxy resin, 26% of urethane tetra-functional epoxy resin, 12% of sodium stearate, 3% of talcum powder, 5% of n-butanol and 26% of distilled water.

The invention has the beneficial effects that:

1. according to the invention, the zinc-based alloy powder and the hard alloy powder are selected, so that the prepared blank has high surface hardness.

2. According to the invention, through heating and cooling treatment, a single uniform austenite structure can be obtained, the plasticity and impact toughness of the stamping die can be reduced, the deformation and cracking of the workpiece are reduced, the hardness is adjusted, the size of the workpiece is stabilized, the internal structure of the stamping die is tighter, and stronger external pressure can be borne.

3. The invention can control the gap between the stamping dies by filling with the binder, and has simple production process and raw material sources.

Detailed Description

The invention is further illustrated in with reference to specific examples.