CN114588841A - Cubic apparatus press and temperature control automatic adjusting method thereof - Google Patents
Cubic apparatus press and temperature control automatic adjusting method thereof Download PDFInfo
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- CN114588841A CN114588841A CN202210346043.XA CN202210346043A CN114588841A CN 114588841 A CN114588841 A CN 114588841A CN 202210346043 A CN202210346043 A CN 202210346043A CN 114588841 A CN114588841 A CN 114588841A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 113
- 238000005245 sintering Methods 0.000 claims abstract description 55
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 36
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 36
- 239000011812 mixed powder Substances 0.000 claims abstract description 10
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/06—Processes using ultra-high pressure, e.g. for the formation of diamonds; Apparatus therefor, e.g. moulds or dies
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a cubic press and a temperature control automatic adjusting method thereof, which determine a standard heating body and standard power in a pre-calibration mode, so that mixed powder in a synthesis block reaches a better sintering temperature when the standard heating body outputs the standard power in a heating system, and the better sintering temperature can be judged by the product state after sintering. And in the synthesis process, the resistance of the current heating body is acquired and compared with the resistance of the standard heating body, and the output power of the heating system is adjusted on the basis of the standard power according to the comparison result. The invention avoids the condition that the output of the heating system of the cubic press needs to be manually adjusted to avoid overhigh or overlow sintering temperature due to different resistances of the heating bodies caused by assembly difference, improves the automation degree of synthesis and improves the sintering synthesis effect.
Description
Technical Field
The invention relates to a cubic apparatus press and a temperature control automatic adjustment method thereof, which belong to the technical field of hard material top pressure sintering synthesis, in particular to automatic temperature control in the sintering synthesis process.
Background
The cubic apparatus press is a device commonly used in the synthesis of diamond in China, wherein most of the cubic apparatus presses a hinge beam, and the cubic apparatus press comprises five parts, namely a host machine, a supercharger, a hydraulic control system, an electrical appliance control system and a heating system. The pressing cavity of the press consists of six hard alloy holding hammers, the pressure of the synthetic block is generated by the extrusion of the holding hammers, and the high temperature is generated by the heat generation of the current introduced by the upper and lower holding hammers through the carbon tubes in the synthetic block.
The heating body in the pyrophyllite synthetic block is formed by assembling assembly parts such as steel rings, gaskets, carbon sheets and carbon tubes, each assembly part has differences in physical size, quality, physical performance and the like, the synthetic block generally has differences in heat conductivity after being assembled, and under the condition that the output power of a heating system of the cubic press is constant, the heating body can be caused to emit heat and then conduct different heat to mixed powder, so that the sintering temperature has differences, the sintering quality is influenced, and the consistency is poor.
The prior art adopts a manual adjustment mode for controlling a heating system, when a product is sintered, a certain power (corresponding current output by the heating system) is given by a person through experience to start sintering, whether the sintering temperature of the product is proper or not is judged through the product state after sand blasting after sintering, when the sintering temperature of the product is too high or too low, the power is increased or reduced properly by the person to perform sintering of the next block, the adjustment amplitude can only be judged according to the manual experience according to the product state after the sand blasting is finished by the sintering of the block, and the process is repeated for several times to find a proper temperature point, namely to find the proper power output by the heating system.
However, due to the assembly differences, even if a proper heating system output power is found, the sintering temperature of the product has certain deviation due to the heat conduction differences of the composite blocks, the sintering quality of the product is affected, and the consistency of the product is poor.
Disclosure of Invention
The invention aims to provide a cubic press and a temperature control automatic adjusting method thereof, which are used for solving the problems of low temperature control intelligence degree and difference of sintering temperature of the cubic press.
In order to achieve the above object, the scheme of the invention comprises:
the cubic press comprises a heating system, wherein the current output by the heating system is input into a heating body in a synthesis block through a top hammer, and the heating body heats to realize sintering; the controller in the heating system executes instructions to realize the following automatic temperature control adjustment method of the cubic press:
1) collecting the current resistance of a heating body of the currently installed synthetic block, and comparing the current resistance with the standard sample resistance of a standard heating body;
2) if the current resistance is larger than the standard resistance, the heating output power of the heating system is increased on the basis of the standard power according to a set standard;
if the current resistance is smaller than the standard resistance, reducing the heating output power of the heating system on the basis of the standard power according to a set standard;
3) and in the sintering stage in the synthesis process, outputting according to the modified heating output power to finish sintering.
Through pre-calibration, when the standard heating body outputs standard power, the mixed powder in the synthesis block reaches a preset sintering temperature.
The sintering process of the cubic press is completely and automatically controlled by a program, the output power of a heating system does not need to be manually and repeatedly debugged, the automation degree in the synthesis process is improved, and the cost is reduced. Meanwhile, sintering is controlled according to the resistance change of the heating body, so that the method is more scientific and accurate, and the synthesis consistency of the superhard material is improved.
Further, the setting criteria include:
wherein, Δ R is the difference value between the current resistance and the resistance of the standard sample; Δ P is the amount of change in the standard power base rise or the amount of change in the fall; A. b is a preset constant.
Through a pre-calibration mode, the standard sample resistance of the standard heating body is determined, the output power of a heating system which can enable the sintered and synthesized product to achieve the best sintering effect is corresponded, and the temperature which can enable the product to achieve the best sintering effect is the preset sintering temperature (heat). On the premise of ensuring that the preset sintering temperature is reached or the heat quantity is not changed, an empirical formula of the relation between the resistance variation delta R and the output power variation delta P is established, the empirical formula is written into a control program of a heating system, the optimal output power can be automatically and accurately output, and the preset heat quantity can be input into the mixed powder or the mixed powder can reach the preset temperature in each sintering process. Therefore, the sintering temperature of the invention is better and more accurately controlled, and better sintering effect can be achieved.
Further, the value of the constant a ranges from 0.1 to 2.
Further, the value of the constant B ranges from 0.02 to 2.
According to the data accumulated by the experiment or the long-term synthesis sintering, parameter numerical value ranges which can achieve more accurate sintering temperature control aiming at various cubic presses are obtained. The sintering temperature control effect is improved.
Further, when the difference value between the current resistance and the standard sample resistance is larger than a set value, an alarm signal is output to stop the synthesis process.
When the difference between the resistance and the standard sample is large, the synthesized block is judged to be possibly an unqualified product, the heating body is possibly in a problem, the output heating power of the synthesized block is difficult to be successfully sintered and synthesized, even potential safety hazards exist, a stop signal is sent out when the difference exceeds a set value, synthesis is not carried out, the loss of the anvil is reduced, and the production safety is ensured.
The invention discloses a method for automatically adjusting the temperature control of a cubic press, which comprises the following steps:
1) a heating system of the cubic press collects the current resistance of a heating body of a currently installed synthetic block and compares the current resistance with the standard sample resistance of a standard heating body; the current output by the heating system is used for being input into the heating body in the synthesis block through the top hammer, so that the heating body is heated to realize sintering;
2) if the current resistance is larger than the standard resistance, the heating output power of the heating system is increased on the basis of the standard power according to a set standard;
if the current resistance is smaller than the standard resistance, reducing the heating output power of the heating system on the basis of the standard power according to a set standard;
3) and in the sintering stage in the synthesis process, the heating system outputs according to the modified heating output power to finish sintering.
When the standard heating body outputs standard power, the mixed powder in the synthesis block reaches a preset sintering temperature.
Further, the setting criteria include:
wherein, Δ R is the difference value between the current resistance and the resistance of the standard sample; Δ P is the amount of change in the standard power base rise or the amount of change in the fall; A. b is a preset constant.
Further, the value of the constant a ranges from 0.1 to 2.
Further, the value of the constant B ranges from 0.02 to 2.
Further, when the difference value between the current resistance and the standard sample resistance is larger than a set value, an alarm signal is output to stop the synthesis process.
The method of the invention has the following beneficial effects:
(1) the whole process is automatically controlled by equipment, manual control is reduced, and the automation degree is greatly improved;
(2) the automatic control is accurate and effective, the manual control is avoided being random, the sintering temperature deviation of the product is large, and the yield and the quality stability of the product are improved;
(3) the problems of neglected loading, multiple loading, wrong loading and the like during product assembly can be identified in advance through larger resistance value deviation, and excessive hammer consumption is avoided.
Drawings
FIG. 1 is a flow chart of the method for automatically adjusting the temperature control of the cubic press according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment of cubic apparatus press:
the cubic press comprises a heating system, wherein the output power (current) of the heating system is heated by a heating body with a certain resistance value in a pyrophyllite synthesis block, so that mixed powder is heated in the extrusion process.
Heat Q required for synthesis of diamond or other superhard materialNeed toIs constant, so the heating system uses constant power (output power P) for heating. Q due to heat loss during heatingNeed to＝αQGeneral assembly，QGeneral (1)The total heating value of the cubic press is generated by the output power P of the heating system, and comprises the following components:
Qneed to＝αQGeneral assembly＝αPT＝αI2RT
Wherein T is the heating time of the heating system, I is the constant current output under the working voltage of the heating system, R is the resistance of the heating body, and alpha is the heat transfer efficiency of the cubic press.
According to the experience summarized from the historical sintering data, the heat transfer efficiency alpha of the cubic press is inversely proportional to the resistance of the heating body, the resistance of the heating body is increased, the heat transfer efficiency is reduced, and when the resistance of the heating body is reduced, the heat transfer efficiency is increased. Thus obtaining an empirical formula
A is a constant reflecting the relationship between resistance and heat transfer efficiency, and can be obtained through experiments orAnd obtaining historical data.
Determining a standard heating body as a standard sample according to multiple tests or historical sintering synthesis process, and determining the resistance R of the standard sampleSign boardAnd the output power of the heating system of the cubic press when the standard sample reaches the optimal sintering temperature is taken as the calibration power PSign board。
Q at optimum sintering temperatureNeed toComprises the following steps:
finishing to obtain:
wherein the content of the first and second substances,
the practical physical meaning of B is that the heating power of the heating system is actually applied to the mixed powder after the heat is dissipated. According to different cubic press products, A and B have different values, and according to experiments, the preferred embodiment of A is in the range of 0.1-2 m omega, and the preferred embodiment of B is in the range of 0.02-2 KW.
In the actual synthesis process, the actually used heating body resistance is detected, and the output power of the heating system is determined according to the following relation:
wherein, Δ P is the sum of the nominal power PSign boardComparing the actual output power variation of the heating system, namely the variation of the output power of the heating system synthesized at this time compared with the calibration power; Δ R is the resistance R of the standardSign boardCompared with the actual synthesis process, the variation of the heating body resistance detected in the actual synthesis process is the difference between the actually used heating body resistance and the standard sample resistance.
The method for automatically adjusting the temperature control of the cubic press is shown in fig. 1 and executed according to the following logic steps by writing the standard sample parameters, the above relation and the value of A, B into a heating system program.
Each time of synthesis, the heater system of the cubic press detects the heater resistance of the currently installed synthesis block. When the actually used heater resistance increases,. DELTA.R is positive, according to
Get Δ P positive, should be at nominal power PSign boardOn the basis of increasing the heating system power to PSign board+ Δ P, the more the actual used heater resistance exceeds the standard resistance, the more the heating system power increases; when the heater resistance is decreased in actual use, Δ R is negative according to
Get Δ P negative, should be at nominal power PSign boardOn the basis of reducing the heating system power to PSign board+ Δ P (Δ P is negative), the more the actual heater resistance is lower than the standard resistance, the more the heating system power is increased.
The relation is solidified and enters a heating system controller, and the actual output power P is obtained according to the delta P and the calibration powerSign boardAnd + delta P, outputting corresponding heating power P by the heating system, and finishing the sintering in the current synthesis process. The process is automatically realized through a program without manual intervention. When the resistance variation, namely delta R, of the currently used heating body is compared with the resistance of a standard sample, and the set limit is exceeded, the alarm of the cubic press stops synthesis at the moment, and the problem of assembly needs to be investigated by manual intervention so as to prevent safety accidents.
After each work order is finished, the adjusting range of the resistance of the heating body in the work order compared with the resistance of the standard heating body can be automatically gathered and stored, so that the subsequent data analysis is facilitated.
According to the invention, the resistance of the heating body is collected in each sintering process and is compared with the resistance of the standard sample, when the resistance is found to be increased or decreased, the output power of the heating system is increased or decreased according to the preset relation, so that the uniformity of the sintering temperature is ensured, the problems of large workload and complicated operation caused by a plurality of tests which need to be performed manually according to experience in the prior art are solved, and the problem of large sintering temperature difference caused by an assembly process is also avoided.
The method comprises the following steps:
the steps of the method for automatically adjusting the temperature control of the cubic press according to the present invention are sufficiently clear in the embodiments of the cubic press, and thus, the detailed description thereof is omitted.
Claims (10)
1. A cubic apparatus press comprises a heating system, wherein the current output by the heating system is input into a heating body in a synthesis block through an anvil, and the heating body generates heat to realize sintering; the method is characterized in that a controller in the heating system executes instructions to realize the following automatic temperature control adjustment method of the cubic press:
1) collecting the current resistance of a heating body of the currently installed synthetic block, and comparing the current resistance with the standard resistance of a standard heating body;
2) if the current resistance is larger than the standard resistance, the heating output power of the heating system is increased on the basis of the standard power according to a set standard;
if the current resistance is smaller than the standard resistance, reducing the heating output power of the heating system on the basis of the standard power according to a set standard;
3) in the sintering stage in the synthesis process, outputting according to the modified heating output power to finish sintering;
through pre-calibration, when the standard heating body outputs standard power, the mixed powder in the synthesis block reaches a preset sintering temperature.
2. The cubic press as set forth in claim 1, wherein said set criteria include:
wherein, Δ R is the difference value between the current resistance and the resistance of the standard sample; Δ P is the amount of change in the standard power base rise or the amount of change in the fall; A. b is a preset constant.
3. The cubic press as set forth in claim 2, wherein said constant a ranges from 0.1 to 2.
4. A cubic press as defined in claim 3, wherein said constant B ranges from 0.02 to 2.
5. The cubic press as recited in claim 4, wherein when the difference between the current resistance and the standard resistance is larger than a predetermined value, an alarm signal is outputted to stop the synthesizing process.
6. A temperature control automatic adjusting method of a cubic press is characterized by comprising the following steps:
1) a heating system of the cubic press collects the current resistance of a heating body of a currently installed synthetic block and compares the current resistance with the standard sample resistance of a standard heating body; the current output by the heating system is used for being input into the heating body in the synthesis block through the top hammer, so that the heating body is heated to realize sintering;
2) if the current resistance is larger than the standard resistance, the heating output power of the heating system is increased on the basis of the standard power according to a set standard;
if the current resistance is smaller than the standard resistance, reducing the heating output power of the heating system on the basis of the standard power according to a set standard;
3) in the sintering stage in the synthesis process, the heating system outputs according to the modified heating output power to finish sintering;
through pre-calibration, when the standard heating body outputs standard power, the mixed powder in the synthesis block reaches a preset sintering temperature.
7. The automatic temperature control adjustment method for cubic press according to claim 6, wherein said setting criteria comprises:
wherein, Δ R is the difference value between the current resistance and the resistance of the standard sample; Δ P is the amount of change in the standard power base rise or the amount of change in the fall; A. b is a preset constant.
8. The method as claimed in claim 7, wherein the constant A is in the range of 0.1 to 2.
9. The method as set forth in claim 8, wherein said constant B ranges from 0.02 to 2.
10. The method as set forth in claim 9, wherein when the difference between said current resistance and the resistance of the standard sample is greater than a predetermined value, an alarm signal is output to stop the synthesis process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210346043.XA CN114588841B (en) | 2022-03-31 | 2022-03-31 | Hexahedral top press and automatic temperature control adjustment method thereof |
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| CN202210346043.XA CN114588841B (en) | 2022-03-31 | 2022-03-31 | Hexahedral top press and automatic temperature control adjustment method thereof |
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| CN114588841B CN114588841B (en) | 2024-03-12 |
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|---|---|---|---|---|
| RU2032617C1 (en) * | 1989-07-04 | 1995-04-10 | Институт сверхтвердых материалов им.В.Н.Бакуля АН Украины | Method for monitoring and control of diamond synthesizing process |
| CN102350268A (en) * | 2011-07-01 | 2012-02-15 | 中南钻石股份有限公司 | Industrial diamond synthesizing device and synthetic method |
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| CN107921390A (en) * | 2015-07-30 | 2018-04-17 | 第六元素（英国）有限公司 | Encapsulated member component and its application method for super-pressure press |
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-
2022
- 2022-03-31 CN CN202210346043.XA patent/CN114588841B/en active Active
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| RU2032617C1 (en) * | 1989-07-04 | 1995-04-10 | Институт сверхтвердых материалов им.В.Н.Бакуля АН Украины | Method for monitoring and control of diamond synthesizing process |
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| CN102436278A (en) * | 2011-08-24 | 2012-05-02 | 张克勇 | Electric heater and control device thereof |
| CN107921390A (en) * | 2015-07-30 | 2018-04-17 | 第六元素（英国）有限公司 | Encapsulated member component and its application method for super-pressure press |
| CN112040577A (en) * | 2020-09-01 | 2020-12-04 | 北京阿尔玛斯科技有限公司 | Substance synthesis control method and device and electronic equipment |
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| Title |
|---|
| 鄂洪儒等: "人造金刚石合成工艺中应用模糊控制的探讨", 《珠宝科技》, vol. 15, no. 2, pages 5 - 8 * |
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