阅读说明：本技术 一种新型金刚石压机预热方法 (Novel diamond press preheating method ) 是由 柯拥军 贾春峰 王晓辉 于 2020-05-11 设计创作，主要内容包括：本发明公开一种新型金刚石压机预热方法,采用慢预热方式,包括如下步骤：1min压力至40兆帕,功率升至1.5kw；恒温5分后10秒升至2千瓦,电流至正常使用电流1/3；预热时间达到45h正常开机；开机前使用三块流动性强的叶腊石块合成；合成第一块超终压后停机,停热4分后开始泄压,泄压速率0.1兆帕/秒,泄压至40兆帕后泄压速率调整为0.3兆帕/秒,泄压至20兆帕时泄压速率调整为0.5兆帕/秒；合成第二块至18分停机,合成第三块至23分停机,同样以上述泄压模式进行,回程后到开始装块；三块工艺后,第四块开始转为正常加热,停热后时间延长2分,合成3-5块后恢复正常泄压时间,采用慢预热方式,预热后再开机,避免开机过程中出现放气炮或暂停放炮及裂加热锤现象。(The invention discloses a novel diamond press preheating method, which adopts a slow preheating mode and comprises the following steps: 1min pressure to 40 MPa, power to 1.5 kw; keeping the temperature for 5 minutes, then increasing the temperature to 2 kilowatts in 10 seconds, and carrying out current until the current is 1/3 in normal use; normally starting up when the preheating time reaches 45 h; before starting up, synthesizing three pyrophyllite blocks with strong fluidity; stopping the machine after the first block is synthesized and the heat is stopped for 4 minutes, and then, starting to release the pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa; synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, similarly performing the pressure relief mode, and returning to start block loading; after three processes, the fourth block is converted into normal heating, the time is prolonged by 2 minutes after heat is stopped, the normal pressure relief time is recovered after 3-5 blocks are synthesized, a slow preheating mode is adopted, and the machine is started after preheating, so that the phenomena of air blasting or blasting suspension and heating hammer cracking in the starting process are avoided.)

1. A novel preheating method of a diamond press is characterized by comprising the following steps: adopts a slow preheating mode, and comprises the following steps:

(1) 1 minute pressure to 40 mpa, 1 minute power to 1.5 kw;

(2) after the constant temperature is kept for 5 minutes, the temperature rises to 2 kilowatts in 10 seconds, and the current reaches one third of the current normally used;

(3) the normal start-up is carried out when the preheating time reaches 45 hours;

(4) before starting up, three pyrophyllite blocks with strong fluidity are used for synthesis;

(5) stopping the machine after the first block is synthesized and exceeds the final pressure (6-7 minutes), stopping heating for 4 minutes, and then beginning to release pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa;

(6) synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, and similarly performing the pressure relief mode in the step (5), wherein the time from the return stroke to the start of block loading is not more than 8 minutes;

(7) after three processes, the fourth block begins to be converted into normal heating time, but the time after the heat is stopped is prolonged by 2 minutes, the time for primary pressure release and the time for secondary pressure release are respectively prolonged by 1 minute, and the normal pressure release time is recovered after 3-5 blocks are synthesized.

2. The novel diamond press preheating method as set forth in claim 1, characterized in that: and (3) the current in the step (2) reaches one third of the current normally used, and if the power is not adjusted manually, the power is adjusted.

3. The novel diamond press preheating method as set forth in claim 1, characterized in that: in the step (4), the pyrophyllite needs to be roasted for 2-3 hours for use.

Technical Field

The invention belongs to the technical field of diamond production and processing, and particularly relates to a novel preheating method for a diamond press.

Background

After the 650-type press is shut down, due to the temperature of a top hammer, a steel ring, a large cushion block and hydraulic oil, various seals are in accordance with the influence of a piston and a working cylinder, when discharging and blasting occur in a pause pressure time period or when pressure is released to 50-70 MPa, large bubble accidents occur, due to high pressure, hammers are often consumed to be more than three, the service life of the heating hammer is greatly shortened due to the sharp rise and fall of the temperature of the top hammer, the cubic press is shut down due to maintenance and other reasons in the process of producing diamonds, however, the phenomena of discharging cannons or pause blasting and cracking of the heating hammer easily occur in the starting process, the probability of discharging cannons is higher as the shutdown time is longer, a set of novel preheating technology suitable for the 650-type press needs to be developed, and the phenomena are avoided.

Disclosure of Invention

In order to solve the problems, the invention mainly aims to design a novel preheating method of a diamond press, which adopts a slow preheating mode, and then starts the machine normally after preheating, thereby avoiding the phenomena of air blasting or blasting pause and heating hammer cracking in the starting process.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel preheating method of a diamond press adopts a slow preheating mode and comprises the following steps:

(1) 1 minute pressure to 40 mpa, 1 minute power to 1.5 kw;

(2) after the constant temperature is kept for 5 minutes, the temperature rises to 2 kilowatts in 10 seconds, and the current reaches one third of the current normally used;

(3) the normal start-up is carried out when the preheating time reaches 45 hours;

(4) before starting up, three pyrophyllite blocks with strong fluidity are used for synthesis;

(5) stopping the machine after the first block is synthesized and exceeds the final pressure (6-7 minutes), stopping heating for 4 minutes, and then beginning to release pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa;

(6) synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, and similarly performing the pressure relief mode in the step (5), wherein the time from the return stroke to the start of block loading is not more than 8 minutes;

(7) after three processes, the fourth block begins to be converted into normal heating time, but the time after the heat is stopped is prolonged by 2 minutes, the time for primary pressure release and the time for secondary pressure release are respectively prolonged by 1 minute, and the normal pressure release time is recovered after 3-5 blocks are synthesized.

As a further description of the invention, the current in step (2) reaches one third of the current normally used, and if the power is not manually adjusted.

As a further description of the invention, the pyrophyllite in step (4) needs to be calcined for 2-3 hours.

Compared with the prior art, the invention has the technical effects that:

the invention provides a novel preheating method of a diamond press, which adopts a slow preheating mode, the preheating time reaches 45 hours, the normal starting is carried out, and three pyrophyllite which can be roasted for 2-3 hours are matched for synthesis before the starting, so that the phenomena of air blasting, pause blasting and cracking of a heating hammer in the starting process are effectively avoided.

Detailed Description

The present invention is described in detail below:

a novel preheating method of a diamond press adopts a slow preheating mode and comprises the following steps:

(1) 1 minute pressure to 40 mpa, 1 minute power to 1.5 kw;

(2) after the constant temperature is kept for 5 minutes, the temperature rises to 2 kilowatts in 10 seconds, and the current reaches one third of the current normally used;

(3) the normal start-up is carried out when the preheating time reaches 45 hours;

(4) before starting up, three pyrophyllite blocks with strong fluidity are used for synthesis;

(5) stopping the machine after the first block is synthesized and exceeds the final pressure (6-7 minutes), stopping heating for 4 minutes, and then beginning to release pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa;

(6) synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, and similarly performing the pressure relief mode in the step (5), wherein the time from the return stroke to the start of block loading is not more than 8 minutes;

(7) after three processes, the fourth block begins to be converted into normal heating time, but the time after the heat is stopped is prolonged by 2 minutes, the time for primary pressure release and the time for secondary pressure release are respectively prolonged by 1 minute, and the normal pressure release time is recovered after 3-5 blocks are synthesized.

And (3) the current in the step (2) reaches one third of the current normally used, and if the power is not adjusted manually, the power is adjusted.

In the step (4), the pyrophyllite needs to be roasted for 2-3 hours for use.

Several embodiments are included according to different parameters, and the specific implementation is as follows:

example 1:

the novel diamond press preheating method adopts a slow preheating mode and comprises the following steps:

(1) 1 minute pressure to 40 mpa, 1 minute power to 1.5 kw;

(2) after the constant temperature is kept for 5 minutes, the current rises to 2 kilowatts in 10 seconds, and the current reaches one third of the current normally used, if the power does not reach the value, the power needs to be manually adjusted;

(3) the normal start-up is carried out when the preheating time reaches 45 hours;

(4) before starting up, three pyrophyllite blocks with strong fluidity are needed to be synthesized, and the pyrophyllite needs to be roasted for 2-3 hours;

(5) stopping the machine after the first block is synthesized and exceeds the final pressure (6-7 minutes), stopping heating for 4 minutes, and then beginning to release pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa;

(6) synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, and similarly performing the pressure relief mode in the step (5), wherein the time from the return stroke to the start of block loading is not more than 8 minutes;

(7) after three processes, the fourth block begins to be converted into normal heating time, but the time after the heat is stopped is prolonged by 2 minutes, the time for primary pressure release and the time for secondary pressure release are respectively prolonged by 1 minute, and the normal pressure release time is recovered after 3 blocks are synthesized.

Example 2:

the novel diamond press preheating method adopts a slow preheating mode and comprises the following steps:

(1) 1 minute pressure to 40 mpa, 1 minute power to 1.5 kw;

(2) after the constant temperature is kept for 5 minutes, the current rises to 2 kilowatts in 10 seconds, and the current reaches one third of the current normally used, if the power does not reach the value, the power needs to be manually adjusted;

(3) the normal start-up is carried out when the preheating time reaches 45 hours;

(4) before starting up, three pyrophyllite blocks with strong fluidity are needed to be synthesized, and the pyrophyllite needs to be roasted for 2-3 hours;

(5) stopping the machine after the first block is synthesized and exceeds the final pressure (6-7 minutes), stopping heating for 4 minutes, and then beginning to release pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa;

(6) synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, and similarly performing the pressure relief mode in the step (5), wherein the time from the return stroke to the start of block loading is not more than 8 minutes;

(7) after three processes, the fourth block begins to be converted into normal heating time, but the time after the heat is stopped is prolonged by 2 minutes, the time for primary pressure release and the time for secondary pressure release are respectively prolonged by 1 minute, and the normal pressure release time is recovered after 4 blocks are synthesized.

Example 3:

the novel diamond press preheating method adopts a slow preheating mode and comprises the following steps:

(1) 1 minute pressure to 40 mpa, 1 minute power to 1.5 kw;

(2) after the constant temperature is kept for 5 minutes, the current rises to 2 kilowatts in 10 seconds, and the current reaches one third of the current normally used, if the power does not reach the value, the power needs to be manually adjusted;

(3) the normal start-up is carried out when the preheating time reaches 45 hours;

(4) before starting up, three pyrophyllite blocks with strong fluidity are needed to be synthesized, and the pyrophyllite needs to be roasted for 2-3 hours;

(5) stopping the machine after the first block is synthesized and exceeds the final pressure (6-7 minutes), stopping heating for 4 minutes, and then beginning to release pressure, wherein the pressure release rate is 0.1 MPa/s, the pressure release rate is adjusted to 0.3 MPa/s after the pressure is released to 40 MPa, and the pressure release rate is adjusted to 0.5 MPa/s when the pressure is released to 20 MPa;

(6) synthesizing a second block to stop for 18 minutes, synthesizing a third block to stop for 23 minutes, and similarly performing the pressure relief mode in the step (5), wherein the time from the return stroke to the start of block loading is not more than 8 minutes;

(7) after three processes, the fourth block begins to be converted into normal heating time, but the time after the heat is stopped is prolonged by 2 minutes, the time for primary pressure release and the time for secondary pressure release are respectively prolonged by 1 minute, and the normal pressure release time is recovered after 5 blocks are synthesized.

The invention provides a novel preheating method of a diamond press, which adopts a slow preheating mode, the preheating time reaches 45 hours, the normal starting is carried out, and three pyrophyllite which can be roasted for 2-3 hours are matched for synthesis before the starting, so that the phenomena of air blasting, pause blasting and cracking of a heating hammer in the starting process are effectively avoided.

The above embodiments are only for illustrating the technical solutions of the present invention and are not limited, and other modifications or equivalent substitutions made by the technical solutions of the present invention by the ordinary skilled person in the art are included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.