阅读说明：本技术 一种木工雕刻机用主轴的热处理工艺 (Heat treatment process of main shaft for woodworking engraving machine ) 是由 顾妹英 于 2019-12-17 设计创作，主要内容包括：本发明公开了一种木工雕刻机用主轴的热处理工艺,包括如下步骤：先将主轴铸件放入加热炉中,加热到620-640℃保温5-6h；然后继续加热到860-880℃保温12-13h；然后空冷至360-380℃保温7-8h；然后重新加热到620-640℃保温5-6h；然后继续加热到830-850℃保温12-13h；然后鼓风冷却至320-340℃保温7-8h；然后重新加热到620-640℃保温24-26h；然后空冷至360-380℃再出炉冷却至室温。通过上述方式,本发明能够提高主轴锻件表面的冷却速度,提高组织转变速度,细化组织,提高主轴的强度和精度,满足木工雕刻机用主轴的工作要求。(The invention discloses a heat treatment process of a main shaft for a woodworking engraving machine, which comprises the following steps: firstly, putting a main shaft casting into a heating furnace, heating to 620-640 ℃, and preserving heat for 5-6 h; then continuously heating to 860-880 ℃, and preserving the heat for 12-13 h; then air-cooling to 360-380 ℃ and preserving the heat for 7-8 h; then heating to 620-640 ℃ again and preserving the heat for 5-6 h; then continuously heating to 830-850 ℃ and preserving the heat for 12-13 h; then cooling by air blast to 320-340 ℃ and preserving heat for 7-8 h; then heating to 620-640 ℃ again and preserving the heat for 24-26 h; then air-cooling to 360-380 ℃ and then discharging and cooling to room temperature. Through the mode, the cooling speed of the surface of the main shaft forging piece can be increased, the tissue transformation speed is increased, the tissue is refined, the strength and the precision of the main shaft are improved, and the working requirement of the main shaft for the woodworking engraving machine is met.)

1. A heat treatment process of a main shaft for a woodworking engraving machine is characterized by comprising the following steps of:

(100) firstly, putting a main shaft casting into a heating furnace, heating to 620-640 ℃, and preserving heat for 5-6 h;

(200) then continuously heating to 860-880 ℃, preserving the heat for 12-13h, and then cooling in air;

(300) air cooling to the temperature of 360-380 ℃, preserving heat for 7-8h, then reheating to the temperature of 620-640 ℃, and preserving heat for 5-6 h;

(400) then continuously heating to 830-850 ℃ and preserving heat for 12-13h, and then blowing for cooling;

(500) keeping the temperature for 7-8h when the blast air is cooled to the temperature of 320-340 ℃, then reheating to the temperature of 620-640 ℃, keeping the temperature for 24-26h, then air-cooling to the temperature of 360-380 ℃, and then discharging and cooling to the room temperature.

2. The heat treatment process for the spindle of a woodworking engraving machine as claimed in claim 1, wherein the temperature rise rate in step (100) is 40-45 ℃/h.

3. The heat treatment process for the spindle of the woodworking engraving machine as claimed in claim 1, wherein the temperature rise rate in the step (200) is 30-35 ℃/h.

4. The heat treatment process for the spindle of a woodworking engraving machine as claimed in claim 1, wherein the temperature rise rate in step (300) is 25-30 ℃/h.

5. The heat treatment process for the spindle of the woodworking engraving machine of claim 1, wherein the temperature rise rate in the step (400) is 55-60 ℃/h.

6. The heat treatment process for the spindle of a woodworking engraving machine as claimed in claim 1, wherein the temperature rise rate in step (500) is 25-30 ℃/h.

Technical Field

The invention relates to the technical field of woodworking machinery manufacturing, in particular to a heat treatment process of a main shaft for a woodworking engraving machine.

Background

With the development of the current woodworking industry towards automation, integration and intellectualization, the traditional manual carving is gradually replaced by a numerical control carving machine tool. The existing low-end numerical control engraving machine has the defects of single structure and limited processing and engraving types; the five-axis linkage woodworking engraving machine has high-speed and high-precision processing capability and gradually becomes a mainstream technology in the market. On a five-axis linkage woodworking engraving machine, an electric spindle is undoubtedly one of the most critical components, and the precision of the electric spindle directly influences the engraving precision of the engraving machine.

The existing spindle heat treatment process generally adopts a one-time normalizing process and often cannot meet the performance requirements.

Disclosure of Invention

The invention mainly solves the technical problems that: aiming at the defects of the prior art, the heat treatment process of the main shaft for the woodworking engraving machine is provided, the cooling speed of the surface of the main shaft forge piece can be increased, the tissue transformation speed is increased, the tissue is refined, the strength and the precision of the main shaft are improved, and the working requirement of the main shaft for the woodworking engraving machine is met.

In order to solve the technical problems, the invention adopts a technical scheme that: the heat treatment process of the main shaft for the woodworking engraving machine is provided, the main shaft is a double-swing electric main shaft and is integrated with a motor, the motor is arranged in the main shaft and directly drives the main shaft, and the heat treatment process of the main shaft comprises the following steps:

(100) firstly, putting a main shaft casting into a heating furnace, heating to 620-640 ℃, and preserving heat for 5-6 h;

(200) then continuously heating to 860-880 ℃, preserving the heat for 12-13h, and then cooling in air;

(300) air cooling to the temperature of 360-380 ℃, preserving heat for 7-8h, then reheating to the temperature of 620-640 ℃, and preserving heat for 5-6 h;

(400) then continuously heating to 830-850 ℃ and preserving heat for 12-13h, and then blowing for cooling;

(500) keeping the temperature for 7-8h when the blast air is cooled to the temperature of 320-340 ℃, then reheating to the temperature of 620-640 ℃, keeping the temperature for 24-26h, then air-cooling to the temperature of 360-380 ℃, and then discharging and cooling to the room temperature.

In a preferred embodiment of the present invention, the temperature-raising rate in step (100) is 40-45 ℃/h.

In a preferred embodiment of the present invention, the temperature-raising rate in step (200) is 30-35 ℃/h.

In a preferred embodiment of the present invention, the temperature-raising rate in step (300) is 25-30 ℃/h.

In a preferred embodiment of the present invention, the temperature-raising rate in step (400) is 55-60 ℃/h.

In a preferred embodiment of the present invention, the temperature-raising rate in step (500) is 25-30 ℃/h.

The invention has the beneficial effects that: by adopting the heat treatment process of twice normalizing and high-temperature tempering and adopting blast cooling, the cooling speed of the surface of the main shaft forging piece can be improved, the structure transformation speed is improved, the structure is refined, the strength and the precision of the main shaft are improved, and the working requirement of the main shaft for the woodworking engraving machine is met.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

The embodiment of the invention comprises the following steps: