CN115007540B - Dewaxing method for complex cavity parts - Google Patents
Dewaxing method for complex cavity parts Download PDFInfo
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- CN115007540B CN115007540B CN202210469255.7A CN202210469255A CN115007540B CN 115007540 B CN115007540 B CN 115007540B CN 202210469255 A CN202210469255 A CN 202210469255A CN 115007540 B CN115007540 B CN 115007540B
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- water
- paraffin
- dewaxing
- cavity
- heating device
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- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 159
- 239000012188 paraffin wax Substances 0.000 claims abstract description 107
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000009423 ventilation Methods 0.000 claims abstract description 44
- 239000001993 wax Substances 0.000 claims abstract description 29
- 238000001802 infusion Methods 0.000 claims abstract description 17
- 238000007667 floating Methods 0.000 claims abstract description 16
- 239000008236 heating water Substances 0.000 claims abstract description 7
- 238000004018 waxing Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000003754 machining Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/106—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by boiling the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/007—Heating the liquid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a dewaxing method of a part with a complex cavity, which comprises the steps of firstly fixing the part to be dewaxed in a dewaxing groove of a heating device, and then opening an infusion device to introduce water into the dewaxing groove until the part is completely immersed; heating water in the wax removing groove to a preset temperature through a heating device, then opening a ventilation device to introduce pressurized air with preset pressure into the wax removing groove, and then opening an infusion device to introduce water with preset flow into the wax removing groove; after the heating device, the transfusion device and the ventilation device work for a preset time, taking out the dewaxed parts when the surface of the water is free of any floating paraffin; according to the scheme, the heating device, the infusion device and the ventilation device are in coordination fit, hot water is utilized to melt paraffin, and meanwhile pressurized air is introduced to apply upward acting force to the paraffin.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a dewaxing method for a complex cavity part.
Background
With the development of science and technology, particularly the rapid development of aviation and aerospace fields, the structures of parts are more and more complex, meanwhile, the parts have severe requirements on cleanliness, and any residue in a cavity can cause serious quality problems and even cause serious safety accidents.
In order to prevent excessive materials such as machined scrap iron from entering the part cavity, the part cavity is often filled with filler before machining, and then the filler is removed after the machining is finished, so that the method is a common and effective method for preventing the excessive materials from occurring in the part cavity. Paraffin is a common chemical product with a melting point of about 47-64 ℃, stable chemical property and low price, so that the paraffin has wide application and is often used as a filler in a part cavity in the machining process and can be removed by hot water. However, because the cavity structure of some parts is extremely complicated, the pipeline in the cavity has many corners and dead angles, and the pipeline aperture changes greatly, and there are many exhaust holes that the aperture is very little, lead to the part at the in-process of hot water dewaxing, molten paraffin is blocked in the cavity, simultaneously because the density difference between paraffin and the water is little, lead to buoyancy slightly, it is difficult to flow out the part cavity fast to rely on self buoyancy after the paraffin is heated and melts, consequently lead to the rise of dewaxing time length, inefficiency and processing cost, and the condition that paraffin remains appears easily, and unnecessary paraffin can cause the cleanliness of part to not reach the requirement, and then probably lead to serious quality problems.
Disclosure of Invention
The invention provides a paraffin removal method for a complex cavity part, which aims to solve the technical problems that after machining is finished, paraffin filled in a part cavity is slow in removal speed and paraffin is easy to remain in the existing complex cavity part.
According to one aspect of the invention, a paraffin removal method for a complex cavity part is provided, the paraffin removal method is used for removing paraffin in the complex cavity part, the complex cavity part comprises a plurality of pipelines with different pipe diameters, two adjacent pipelines are arranged in an angle, and the aperture range of a pipeline outlet is 1-5mm, and the paraffin removal method comprises the following steps: a. fixing the part to be dewaxed in a dewaxing groove of a heating device, and then opening an infusion device to continuously introduce water into the dewaxing groove until the part is immersed in the water; b. heating water to a preset temperature through a heating device, then opening a ventilation device to continuously introduce pressurized air with preset pressure to the bottom of the wax removing groove, and simultaneously opening an infusion device to continuously introduce water with preset flow into the wax removing groove, wherein a vent hole of the ventilation device is correspondingly arranged with a pipeline hole of a part; c. the heating device, the infusion device and the ventilation device are cooperatively used to keep the temperature in the wax removing groove at a preset temperature, and enable paraffin in the cavity of the part to be melted and float up to the surface of water, and then the paraffin is discharged into the wax storing container through an overflow port of the heating device; d. after the heating device, the infusion device and the ventilation device work for a preset time, and when the surface of the water does not have any floating paraffin, the heating device, the infusion device and the ventilation device can be closed, and the dewaxed parts can be taken out.
Further, the preset pressure is in the range of 0.2-0.8Mpa.
Further, the value range of the preset time is 10-100min.
Further, the preset temperature is 80-100 ℃.
Further, the value range of the preset flow is 0.05-0.1L/min.
Further, the heating device comprises a de-waxing tank for containing parts and water, a heater for heating the water in the de-waxing tank, a water inlet communicated with the de-waxing tank and used for introducing water, and an overflow port communicated with the de-waxing tank and used for discharging water.
Further, the ventilation device comprises a ventilation pipe communicated with the bottom of the wax removing groove and an air compressor connected with the ventilation pipe and used for conveying pressurized air into the cavity of the part.
Further, the ventilation device comprises a plurality of ventilation pipes which are distributed at intervals along the horizontal direction.
Further, the vent pipe is provided with a plurality of branch pipes which are used for conveying pressurized air into the cavity of the part at intervals along the horizontal direction.
Further, the infusion device comprises a water pipe communicated with the water inlet and used for conveying water into the wax removing groove, and a control valve arranged on the water pipe and used for controlling flow.
The invention has the following beneficial effects:
According to the dewaxing method for the complex cavity part, the part to be dewaxed is fixed in a dewaxing groove of a heating device, a pipeline opening of the part is arranged downwards, and then a transfusion device is opened to continuously feed water into the dewaxing groove until the part is completely immersed by the water; the heating device is used for heating water to a preset temperature, paraffin is melted by heat transfer of the water, the part is heated uniformly and is not easy to deform, the boiling point of the water is 100 ℃, the temperature in the paraffin removal groove is controllable, then the ventilation device is opened to continuously introduce pressurized air with preset pressure into the bottom of the paraffin removal groove, the ventilation port of the ventilation device is correspondingly placed with the pipeline port of the part, the pressurized air in the heating device enters the cavity of the part, upward acting force is applied to the melted paraffin, the paraffin in the cavity of the part floats up quickly from the cavity, the air circulation is strong, the paraffin removal speed can be improved, the pressurized air is controlled at the preset pressure, the fact that the acting force applied by too small pressure is limited is avoided, the paraffin melting speed is reduced due to the fact that the heat of the water is excessively large is continuously introduced into the paraffin removal groove is avoided, the paraffin floating up to the surface of the water is carried away, the excessive heat is avoided, and the heated melting speed of the paraffin is ensured; the heating device, the transfusion device and the ventilation device are cooperatively operated to keep the temperature in the paraffin removal groove at a preset temperature, enable paraffin in the cavity of the part to be melted and float up to the surface of water, then drain into a paraffin storage container through an overflow port of the heating device, and after the heating device, the transfusion device and the ventilation device work for a preset time and when the surface of the water does not have any floating paraffin, the paraffin is completely removed, namely the heating device, the transfusion device and the ventilation device can be closed, and the paraffin removed part is taken out; according to the scheme, the heating device, the infusion device and the ventilation device are cooperatively matched, hot water is utilized to melt paraffin, and meanwhile pressurized air is introduced to apply upward acting force to the paraffin.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a block diagram of the steps of a method for dewaxing a complex cavity part according to a preferred embodiment of the invention;
fig. 2 is a schematic structural view of a dewaxing device in a dewaxing method of a complex cavity part according to a preferred embodiment of the present invention.
Legend description:
1. A heating device; 11. a wax removing groove; 12. a heater; 13. a water inlet; 14. an overflow port; 2. an infusion device; 21. a water pipe; 22. a control valve; 3. a ventilation device; 31. a vent pipe; 32. an air compressor; 4. a wax storage container.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.
FIG. 1 is a block diagram of the steps of a method for dewaxing a complex cavity part according to a preferred embodiment of the invention; fig. 2 is a schematic structural view of a dewaxing device in a dewaxing method of a complex cavity part according to a preferred embodiment of the present invention.
As shown in fig. 1 and 2, the dewaxing method of the complex cavity part of the present embodiment is used for removing paraffin in the complex cavity part, the complex cavity part includes a plurality of pipes with different pipe diameters, two adjacent pipes are arranged at an angle, and the aperture range of the pipe outlet is 1-5mm, and the method includes the following steps: a. fixing the part to be dewaxed in the dewaxed groove 11 of the heating device 1, and then opening the transfusion device 2 to continuously introduce water into the dewaxed groove 11 until the water submerges the part; b. heating water to a preset temperature through the heating device 1, then opening the ventilation device 3 to continuously introduce pressurized air with preset pressure to the bottom of the wax removing groove 11, and simultaneously opening the transfusion device 2 to continuously introduce water with preset flow into the wax removing groove 11, wherein the vent of the ventilation device 3 is correspondingly arranged with the pipeline port of the part; c. the heating device 1, the transfusion device 2 and the ventilation device 3 cooperate to keep the temperature in the wax removing groove 11 at a preset temperature, and enable paraffin in the cavity of the part to be melted and float up to the surface of water, and then the paraffin is discharged into the wax storing container 4 through the overflow port 14 of the heating device 1; d. after the heating device 1, the transfusion device 2 and the ventilation device 3 work for a preset time, and when the surface of the water does not have any floating paraffin, the heating device 1, the transfusion device 2 and the ventilation device 3 can be closed, and the dewaxed parts can be taken out. Specifically, firstly, fixing a part to be dewaxed in a dewaxed groove 11 of a heating device 1, arranging a pipeline opening of the part downwards, and then opening a transfusion device 2 to continuously feed water into the dewaxed groove 11 until the water completely submerges the part; the heating device 1 is used for heating water to a preset temperature, paraffin is melted by heat transfer of the water, the part is heated uniformly and is not easy to deform, the boiling point of the water is 100 ℃, the temperature in the paraffin removal groove 11 is controllable, then the ventilation device 3 is opened, pressurized air with preset pressure is continuously introduced into the bottom of the paraffin removal groove 11, the ventilation port of the ventilation device 3 is correspondingly arranged with the pipeline port of the part, the pressurized air in the heating device 1 enters the cavity of the part, upward acting force is applied to the melted paraffin, the paraffin in the cavity of the part floats up from the cavity rapidly, the circulation of the air is strong, the paraffin removal speed can be improved, the pressurized air is controlled to be at the preset pressure, the limited acting force exerted by too small pressure is avoided, the heat loss of the water is caused by too large pressure, the paraffin melting speed is reduced, meanwhile, the transfusion device 2 is opened, the paraffin floating up to the water surface is continuously introduced into the paraffin removal groove 11, the preset flow is controlled, the paraffin is prevented from being excessively removed, and the heated melting speed of the paraffin is ensured; the heating device 1, the transfusion device 2 and the ventilation device 3 are cooperatively used to keep the temperature in the paraffin removal groove 11 at a preset temperature, enable paraffin in the cavity of the part to be melted and float upwards to the surface of water, then drain into the paraffin storage container 4 through an overflow port of the heating device 1, and after the heating device 1, the transfusion device 2 and the ventilation device 3 are operated for a preset time, and when the surface of the water does not have any floating paraffin, the paraffin is completely removed, the heating device 1, the transfusion device 2 and the ventilation device 3 can be closed, and the paraffin removed part is taken out; according to the scheme, the heating device 1, the transfusion device 2 and the ventilation device 3 are matched in a coordinated manner, hot water is utilized to melt paraffin, and meanwhile pressurized air is introduced to apply upward acting force to the paraffin. It should be understood that the above-described parts are all complex cavity parts. It should be understood that, because the complex cavity part comprises a plurality of pipelines with different pipe diameters, the pipelines with different pipe diameters have flow limiting due to different flow rates, thereby affecting the discharge of paraffin; because the adjacent two pipelines are arranged at an angle, paraffin is easy to block at the corner of the adjacent two pipelines; the aperture range of the outlet of the pipeline is 1mm-5mm, so that the inflow of water is small due to the fact that the inlet is too small, enough upward buoyancy can not be generated by paraffin, and the paraffin is not easy to pass through and is accumulated and blocked due to the fact that the outlet is too small. Alternatively, the parts are secured within the de-waxing tank 11 by a cage such that water and pressurized air may enter the part cavity through the mesh openings of the cage. Optionally, in step b, when the heating device 1 heats water, a sealing cover is arranged on the upper cover of the heating device 1 to assist rapid temperature rise and improve heating efficiency. Preferably, water flows in a mode of slowly dripping from the upper part and flows out in an overflow mode, so that newly-entered water flows on the surface of water in the paraffin removal groove 11, the influence on the internal temperature of the water in the paraffin removal groove 11 is reduced, meanwhile, newly-added water flows on the surface, paraffin on the surface of the water is overflowed and discharged along with flowing water, the paraffin removal condition of a part can be observed visually, and the paraffin removal condition of the part can be observed intuitively due to the open design of the paraffin removal groove 11.
In this embodiment, the preset pressure is in the range of 0.2-0.8Mpa. Specifically, when the preset pressure is 0.2-0.8Mpa, the paraffin removal speed is high, and paraffin is removed completely; when the preset pressure is lower than 0.2Mpa, the acting force exerted by the pressurized air on the paraffin is small, and the paraffin removal effect is poor; when the preset pressure is higher than 0.8Mpa, the heat in the water is carried away due to excessive air delivery, so that the paraffin melting speed in the cavity of the part is low.
In this embodiment, the value range of the preset time is 10-100min. Specifically, when the value of the preset time is between 10 and 100 minutes, the paraffin is thoroughly removed, and the parts cannot be damaged; when the value of the preset time is smaller than 10min, the paraffin cannot be thoroughly removed due to the complex internal structure of the part, so that the quality problem occurs; when the preset time is longer than 100min, the part flows in the pressurized air for a long time, and the internal structure of the part is possibly damaged under the long-time impact of the pressurized air.
In this embodiment, the preset temperature is within the range of 80-100 ℃. Specifically, when the preset temperature is 80-100 ℃, the paraffin melting speed is high, and the overheat deformation of the parts is avoided; when the preset temperature is less than 80 ℃, the paraffin melting speed is low, and the paraffin removal speed is low.
In this embodiment, as shown in fig. 2, the preset flow rate is in the range of 0.05-0.1L/min. Specifically, when the preset flow is 0.05-0.1L/min, the phenomenon that the paraffin cannot be melted due to excessive heat carried away by water discharged from the overflow port 14 can be avoided, and meanwhile, the paraffin removal speed is ensured; when the preset flow is more than 0.1L/min, the water discharged from the overflow port 14 takes away excessive heat, so that the paraffin melting speed is low; when the preset flow is less than 0.05L/min, the flow of water is too small to take away all paraffin floating on the surface, and the paraffin removal speed is low.
As shown in fig. 2, in the present embodiment, the heating apparatus 1 includes a de-waxing tank 11 for accommodating parts and water, a heater 12 for heating the water in the de-waxing tank 11, a water inlet 13 for introducing water in communication with the de-waxing tank 11, and an overflow port 14 for discharging water in communication with the de-waxing tank 11. Specifically, the parts and water are contained through the paraffin removal tank 11 to provide a suitable place for paraffin removal; heating water by a heater 12 to melt paraffin; continuous water inflow through the water inlet 13 ensures adequate water supply; the water with paraffin is drained through overflow 14 until the paraffin is clear. Alternatively, the heater 12 is heated electrically, clean and free of emissions. Optionally, a heater 12 is installed at the bottom of the de-waxing tank 11 to heat the water in the de-waxing tank 11. It will be appreciated that the water inlet 13 is positioned above so that water entering and flowing through the water inlet 13 during de-waxing flows from the water surface within the cavity of the heating device 1 and is discharged with water overflow.
As shown in fig. 2, in the present embodiment, the breather device 3 includes a breather pipe 31 communicating with the bottom of the dewaxing tank 11, and an air compressor 32 connected to the breather pipe 31 for supplying pressurized air into the cavity of the part. Specifically, the air compressor 32 compresses and delivers pressurized air into the vent pipe 31, and the vent pipe 31 delivers pressurized air to the bottom of the wax removing tank 11, so that the pressurized air applies an upward force to the wax. Optionally, the ventilation device 3 further comprises a pressure regulator for regulating the air pressure.
In the present embodiment, the ventilation device 3 includes a plurality of ventilation pipes 31 arranged at intervals in the horizontal direction. Specifically, a plurality of conveying pipes are arranged at intervals along the horizontal direction to convey pressurized air, so that dredging areas of the pressurized air are increased, air inlets corresponding to different areas of the part are formed, and paraffin in the cavity of the part is thoroughly removed.
As shown in fig. 2, in the present embodiment, the ventilation pipe 31 is provided with a plurality of branch pipes for supplying pressurized air into the cavity of the part at intervals in the horizontal direction. Specifically, through the many branch pipes that are equipped with along the horizontal direction interval conveying pressurized air, increase the mediation region of pressurized air to the inlet port in the different regions of corresponding to the part ensures that the paraffin in the part cavity is clear away thoroughly. Optionally, the branch pipes are arranged in one-to-one correspondence with the pipe openings of the parts.
As shown in fig. 2, in the present embodiment, the infusion device 2 includes a water pipe 21 communicating with the water inlet 13 for delivering water into the wax removing tank 11, and a control valve 22 mounted on the water pipe 21 for controlling the flow rate. Specifically, water is conveyed into the paraffin removal tank 11 through a water conveying pipe 21, then the water conveying pipe 21 is opened when paraffin removal is required through a control valve 22, and the water conveying pipe 21 is closed after paraffin removal. Optionally, the infusion device 2 further comprises a container for containing water and a hydraulic pump for providing conveying power, which are communicated with the water conveying pipe 21. Alternatively, the heater 12 is mounted on the water pipe 21 to heat water flowing through the water pipe 21.
Specifically, the following examples are also provided:
Example 1
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.50MPa and the wax is removed for 35min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
Example 2
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.45MPa and the wax is removed for 30min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
Example 3
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.55MPa and the wax is removed for 25min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
Example 4
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.45MPa and the wax is removed for 20min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
Example 5
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.55MPa and the wax is removed for 45min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
Example 6
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.50MPa and the wax is removed for 25min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
Example 7
As shown in fig. 2, the part to be dewaxed is placed in the dewaxed tank 11, water is injected through the water pipe 21 until the water completely submerges the part and is slightly higher than the overflow port 14, and the water pipe 21 is closed; the heater 12 is turned on to heat the water to about 80 ℃, and simultaneously the air compressor 32 is turned on, pressurized air is introduced, and the preset pressure is obtained: after the water pipe 21 is opened at 0.60MPa and the wax is removed for 40min, the water surface is clean, no floating paraffin exists, and the water pipe 21, the air compressor 32 and the heater 12 can be closed, and the dewaxed parts are taken out.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The paraffin removal method for the complex cavity part is used for removing paraffin in the complex cavity part, the complex cavity part comprises a plurality of pipelines with different pipe diameters, two adjacent pipelines are arranged at an angle, and the aperture range of the pipeline outlet is 1-5mm, and is characterized by comprising the following steps:
a. Fixing the part to be dewaxed in a dewaxing groove (11) of the heating device (1), and then opening the transfusion device (2) to continuously introduce water into the dewaxing groove (11) until the part is immersed in the water;
b. Heating water to a preset temperature through a heating device (1), then opening a ventilation device (3) to continuously introduce pressurized air with preset pressure to the bottom of a wax removing groove (11), and simultaneously opening an infusion device (2) to continuously introduce water with preset flow into the wax removing groove (11), wherein an air port of the ventilation device (3) is correspondingly placed with a pipeline port of a part, and the value range of the preset pressure is 0.2-0.8Mpa;
c. The heating device (1), the infusion device (2) and the ventilation device (3) are cooperatively used to keep the temperature in the wax removing groove (11) at a preset temperature, enable paraffin in the cavity of the part to be melted and float up to the surface of water, and then drain into the wax storage container (4) through an overflow port (14) of the heating device (1);
d. after the heating device (1), the infusion device (2) and the ventilation device (3) work for a preset time, and when the surface of the water does not have any floating paraffin, the heating device (1), the infusion device (2) and the ventilation device (3) can be closed, and the dewaxed parts can be taken out.
2. The method for dewaxing a complex cavity feature of claim 1 wherein the predetermined time is in the range of 10 to 100 minutes.
3. The method for dewaxing a complex cavity feature of claim 1 wherein the predetermined temperature is in the range of 80-100 ℃.
4. The method for dewaxing a complex cavity feature of claim 1 wherein the predetermined flow rate is in the range of 0.05 to 0.1L/min.
5. A method of de-waxing a complex cavity part according to any one of claims 1 to 4, wherein the heating means (1) comprises a de-waxing tank (11) for receiving the part and water, a heater (12) for heating the water in the de-waxing tank (11), a water inlet (13) for introducing water in communication with the de-waxing tank (11) and an overflow (14) for draining water in communication with the de-waxing tank (11).
6. The method for dewaxing a complex cavity part according to claim 5, wherein the breather (3) comprises a breather pipe (31) communicating with the bottom of the dewaxing tank (11) and an air compressor (32) connected to the breather pipe (31) for delivering pressurized air into the part cavity.
7. The method for dewaxing complex cavity parts according to claim 6, wherein the ventilation means (3) comprises a plurality of ventilation pipes (31) arranged at intervals in the horizontal direction.
8. A method of dewaxing a complex cavity part according to claim 6 wherein the breather tube (31) is provided with a plurality of branches spaced apart horizontally for delivering pressurized air into the part cavity.
9. The method for dewaxing complex cavity parts according to claim 5, wherein the transfusion device (2) comprises a water pipe (21) communicated with the water inlet (13) for delivering water into the dewaxing groove (11) and a control valve (22) mounted on the water pipe (21) for controlling the flow.
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