CN107030951B - Slurry pump bionic piston casting forming method and forming device - Google Patents
Slurry pump bionic piston casting forming method and forming device Download PDFInfo
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- CN107030951B CN107030951B CN201710451147.6A CN201710451147A CN107030951B CN 107030951 B CN107030951 B CN 107030951B CN 201710451147 A CN201710451147 A CN 201710451147A CN 107030951 B CN107030951 B CN 107030951B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
- B29C2043/023—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves
- B29C2043/025—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves forming a microstructure, i.e. fine patterning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7494—Pistons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a slurry pump bionic piston casting forming method and a forming device. The device of the invention mainly comprises an upper die cover, a central support, a bottom die base and a middle die, wherein the upper die cover is provided with a male die, and the bottom die base is provided with a female die. The male die structure is used for forming the hollow part of the piston cup, and the female die structure is used for fixing the high styrene butadiene styrene skeleton base rubber. The upper part of the middle shaft is used for forming the hollow part where the piston connecting rod is located, and the lower part of the middle shaft is matched with the middle positioning hole of the bottom die holder to play a centering role. A bionic structure unit is designed on the middle die, and the bionic pit structure can be formed at one time after die assembly. The method and the device of the invention have simple principle and structure and high repeatability, and can be used for the batch production of the bionic pit-shaped piston.
Description
Technical Field
The invention relates to a method and a device for casting and molding a bionic piston of a slurry pump. The casting forming method and the casting forming device are used for casting the bionic piston of the pit-type slurry pump, the casting of the bionic pit is added on the basis of the traditional sealed wear-resistant piston, and the pit structure can be formed at one time.
Background
The development of energy sources for conventional oil and gas, or the further development of shale oil and gas, does not leave the mud pumps used in drilling rigs. Mud pumps deliver mud from the bottom of the well during drilling and carry the drilling cuttings through the mud to the surface. Two key components in this mud circulation process are the cylinder liner and the piston, respectively. The conditions of high sand content, high viscosity, high corrosivity and the like of a conveying medium and the high-pressure working condition of reciprocating motion between a piston and a cylinder sleeve can cause the piston to lose efficacy, and the service life of the piston is influenced.
The idea of biomimetic non-smooth structures comes from living beings in nature. In the course of evolution, in order to adapt to changes in the environment, the body surface forms structures with certain characteristics. Through a large amount of research and research, the key laboratory of the engineering bionic education department of Jilin university finds that the body surfaces of many animals have non-smooth structures, and the shapes of the non-smooth structures comprise convex bag shapes, flake shapes, pit shapes and stripe shapes. The pit structure is the basic basis of the piston cast by the invention.
Back holes which are regularly distributed are distributed on the body surface of the earthworms between each section of the body, and when the earthworms enter soil, lubricating body fluid is secreted through the back hole arrays, so that the earthworms can conveniently pass through the soil. The mud pump bionic piston with the pit-shaped surface is designed on the basis of the function of the back hole on the body surface of the earthworm and by combining a large number of research results on wear resistance and drag reduction of the pit.
Disclosure of Invention
The invention aims to provide a processing technology of a bionic piston of a pit-type mud pump on the basis of the existing traditional mud pump piston and a processing method of a stripe groove mud pump piston. The bionic unit with the pit shape is processed on the piston leather cup through the designed die device, so that the performance of the piston is improved from the three aspects of sealing, lubrication and wear resistance, and the service life of the piston is prolonged. The traditional pit processing method is one-by-one single processing. The invention changes the traditional pit processing method, and utilizes the bionic structure unit on the middle die to form the pit structure and the array arrangement on the whole piston leather cup at one time.
The casting forming method of the mud pump bionic piston comprises the following steps:
the first step is as follows: the lower positioning hole faces upwards, and the bottom die base is fixed on the processing platform; fixedly placing the high styrene butadiene styrene skeleton base glue on a female die of a bottom die base;
the second step is that: after the high styrene butadiene styrene skeleton base rubber is fixed, a lower sealing gasket is placed at the edge of the upper part of the bottom die base;
the third step: after the lower sealing gasket is placed, the central support is arranged on the bottom die base; the lower positioning pins are tightly matched with the lower positioning holes, and the other three groups of lower positioning pins are matched and positioned with the lower positioning holes in the same way;
the fourth step: pressing with a downward uniform force on the center support; matching the middle mold and the central support, wherein the positioning pins of the middle mold are matched with the through holes on the central support in a one-to-one correspondence manner;
the fifth step: tightly combining the middle mold with the center support by using a fastening clamp; the through hole on the fastening clip is used for clamping;
and a sixth step: after the middle mold and the central support are closed, the upper sealing gasket is placed at the edge of the upper part of the central support;
the seventh step: the upper die cover and the central support are matched, the central shaft and the central positioning hole are matched, a silicone oil isolating agent is coated on the surface layer of the upper die cover and the central support by using a coating brush, the high styrene butadiene styrene framework primer is placed at the bottom of the die cavity, and then the elastic rubber is filled; meanwhile, the upper positioning hole is tightly matched with the corresponding upper positioning pin; and applying downward uniform force on the upper die cover for pressing, and completing die assembly. And (5) after die assembly, carrying out pressure vulcanization by using a flat vulcanizing machine to finish casting.
A forming device used in a mud pump bionic piston casting forming method comprises an upper die cover, a male die, a center shaft, a center support, a middle die, a fastening clamp, a female die and a bottom die base, wherein the center support is provided with an upper positioning pin and a lower positioning pin, the surface of the center support is provided with a through hole, the male die is arranged at the lower part of the upper die cover, the female die is arranged on the bottom die base, the bottom die base is provided with a lower positioning hole and a center positioning hole, the middle die is positioned between the bottom die base and the upper die cover, the center support is arranged on the bottom die base, the center shaft is inserted into the center positioning hole, the lower positioning pin is inserted into the lower positioning hole to be tightly matched and positioned, the upper sealing gasket is arranged at the upper edge of the center support, and the lower sealing gasket is arranged at the upper edge of the bottom die base; the upper die cover is provided with an upper positioning hole, and the upper positioning pin is inserted into the upper positioning hole for positioning; the positioning pins of the middle die are correspondingly matched with the through holes in the central support one by one, the front parts of the positioning pins extend to form protruding rods, the protruding rods penetrate through the through holes, and the protruding rods and the through holes form a bionic structure unit; the fastening clamp clamps the middle mold and the central support, and the fastening clamp is provided with a through hole for clamping.
The bionic structure formed by the bionic structure unit is in a pit shape.
The fastening clamp clamps the middle mold and the central support, and is provided with a through hole for clamping; the middle mould is provided with a bionic structure unit,
the male die is used for forming the hollow part of the piston cup (elastic rubber). The upper part of the middle shaft is used for forming the hollow part where the piston connecting rod is located, and the lower part of the middle shaft is matched with the central positioning hole of the bottom die holder to play a centering role. The female die is used for fixing the high styrene butadiene styrene skeleton base rubber. The central support is used for closing the upper die cover and the bottom die base and also plays a role in positioning the middle die. The middle die is provided with through holes, and the number of the through holes is consistent with the number of the positioning pins of the middle die in structural size. The bionic structure unit is used for forming a pit structure on the piston leather cup.
The invention has the beneficial effects that:
the casting forming method of the bionic piston of the slurry pump has simple principle and easy realization, and the purpose of one-step forming of the pit structure on the surface of the bionic piston can be achieved by using the method. The forming device of the invention has simple structure and is suitable for mass production of enterprises.
Drawings
FIG. 1 is a perspective view of a molding apparatus of the present invention.
FIG. 2 is a front view of the molding apparatus of the present invention.
FIG. 3 is a perspective view of a base mold of the molding apparatus.
FIG. 4 is a top view of a base mold of the molding apparatus.
FIG. 5 is a perspective view of the upper and lower sealing gaskets of the forming apparatus.
FIG. 6 is a perspective view of the upper die cover, the male die, and the central shaft of the forming device.
Fig. 7 is a partial perspective view of a mold in the molding apparatus.
FIG. 8 is a perspective view of a center support of the forming device.
Detailed Description
As shown in fig. 1 and fig. 2, the slurry pump bionic piston casting forming method of the invention comprises the following steps:
the first step is as follows: the lower positioning hole 16 faces upwards, and the bottom die base 17 is fixed on the processing platform; the high styrene butadiene styrene skeleton primer is fixedly placed on the female die 15 of the bottom die base 17;
the second step is that: after the high styrene butadiene styrene skeleton base rubber is fixed, a lower sealing gasket 18 is placed at the edge of the upper part of the bottom die base 17;
the third step: after the lower sealing gasket 18 is placed, the central support 6 is arranged on the bottom die holder 17; the lower positioning pins 8 are tightly matched with the lower positioning holes 16, and the other three groups of lower positioning pins 8 are matched and positioned with the lower positioning holes 16 in the same way;
the fourth step: pressing with a downward uniform force on the central support 6; matching the middle mold 11 and the central support 6, wherein the positioning pins 10 of the middle mold 11 are correspondingly matched with the through holes 7 on the central support 6 one by one;
the fifth step: the middle mould 11 is tightly combined with the central support 6 by a fastening clip 12; the through hole 13 on the fastening clip 12 is used for clamping;
and a sixth step: after the middle mold 11 and the central support 6 are closed, the upper sealing gasket 4 is placed at the upper edge of the central support 6;
the seventh step: the upper die cover 1 and the center support 6 are matched, the center shaft 3 and the center positioning hole 14 are matched, the surface layer of the center shaft is coated with a silicone oil separant by using a coating brush, the high styrene butadiene styrene skeleton primer is placed at the bottom of the die cavity, and then the elastic rubber is filled; meanwhile, the upper positioning hole 19 of the upper die cover 1 is tightly matched with the corresponding upper positioning pin 5; and (4) applying downward uniform force on the upper die cover 1 for pressing, and completing die assembly. And (5) after die assembly, carrying out pressure vulcanization by using a flat vulcanizing machine to finish casting.
As shown in fig. 1 to 8, a molding device used in a slurry pump bionic piston casting molding method includes an upper mold cover 1, a male mold 2, a center shaft 3, a center support 6, a middle mold 11, a fastening clip 12, a female mold 15 and a bottom mold base 17, wherein the center support 6 has an upper positioning pin 5 and a lower positioning pin 8, the surface of the center support 6 has a through hole 7, the male mold 2 is arranged at the lower part of the upper mold cover 1, the bottom mold base 17 is provided with the female mold 15, the bottom mold base 17 has a lower positioning hole 16 and a center positioning hole 14, the middle mold 11 is positioned between the bottom mold base 17 and the upper mold cover 1, the center support 6 is mounted on the bottom mold base 17, the center shaft 3 is inserted into the center positioning hole 14, the lower positioning pin 8 is inserted into the lower positioning hole 16 for tight fit positioning, an upper sealing gasket 4 is arranged at the upper edge of the center support 6, and a lower sealing gasket 18 is arranged at the upper edge of the bottom mold base 17; the upper die cover 1 is provided with an upper positioning hole 9, and the upper positioning pin 5 is inserted into the upper positioning hole 9 for positioning; the positioning pins 10 of the middle die 11 are correspondingly matched with the through holes 7 on the central support 6 one by one, the front parts of the positioning pins 10 extend to form protruding rods 101, the protruding rods 101 penetrate through the through holes 7, and the protruding rods 101 and the through holes 7 form a bionic structure unit; a clamping clip 12 clamps the central mold 11 with the central support 6, the clamping clip 12 having a through hole 13 for clamping.
The male die 2 is used for forming the hollow part of a piston cup (elastic rubber). The upper part of the middle shaft 3 is used for forming the hollow part where the piston connecting rod is located, and the lower part of the middle shaft 3 is matched with a central positioning hole 14 of a bottom die holder 17 to play a centering role. The female die 15 is used for fixing the high styrene butadiene styrene skeleton base rubber. The center support 6 is used for clamping the upper mold cover 1 and the lower mold base 17 and also plays a role in positioning the middle mold 11. The middle die 11 is provided with through holes 7, and the number of the through holes 7 is consistent with the number of the positioning pins 10 of the middle die 11 in structural size. The bionic structure unit 9 is used for forming a pit structure on the piston leather cup.
Claims (1)
1. A mud pump bionic piston casting forming method comprises an upper die cover (1), a male die (2), a middle shaft (3), a central support (6), a middle die (11), a fastening clamp (12), a female die (15) and a bottom die base (17), wherein the central support (6) is provided with an upper positioning pin (5) and a lower positioning pin (8), the surface of the central support (6) is provided with a through hole (7), the lower part of the upper die cover (1) is provided with the male die (2), the bottom die base (17) is provided with the female die (15), the bottom die base (17) is provided with a lower positioning hole (16) and a central positioning hole (14), the middle die (11) is positioned between the bottom die base (17) and the upper die cover (1), the central support (6) is installed on the bottom die base (17), the middle shaft (3) is inserted into the central positioning hole (14), the lower positioning pin (8) is inserted into the lower positioning hole (16) to be tightly matched and positioned, an upper sealing gasket (4) is arranged at the edge of the upper part of the central support (6), and a lower sealing gasket (18) is arranged at the edge of the upper part of the bottom die base (17); the upper die cover (1) is provided with an upper positioning hole (9), and the upper positioning pin (5) is inserted into the upper positioning hole (9) for positioning; the positioning pins (10) of the middle mold (11) are correspondingly matched with the through holes (7) on the central support (6) one by one, the front parts of the positioning pins (10) extend to form protruding rods (101), the protruding rods (101) penetrate through the through holes (7), and the protruding rods (101) and the through holes (7) form a bionic structure unit; the fastening clamp (12) clamps the middle mold (11) and the central support (6), and a through hole (13) is formed in the fastening clamp (12) for clamping;
the method is characterized in that: the method comprises the following steps:
the first step is as follows: the lower positioning hole (16) is upward, and the bottom die holder (17) is fixed on the processing platform; the base adhesive of the high styrene butadiene styrene skeleton is fixedly placed on a concave die (15) of a bottom die base (17);
the second step is that: after the high styrene butadiene styrene skeleton primer is fixed, a lower sealing gasket (18) is placed at the edge of the upper part of the bottom die base (17);
the third step: after the lower sealing gasket (18) is placed, the central support (6) is arranged on the bottom die base (17); the lower positioning pins (8) are tightly matched with the lower positioning holes (16), and the other three groups of lower positioning pins (8) are matched and positioned with the lower positioning holes (16) in the same way;
the fourth step: exerting a downward uniform force on the central support (6) for pressing; matching a middle die (11) and a central support (6) and correspondingly matching positioning pins (10) of the middle die (11) with through holes (7) in the central support (6) one by one;
the fifth step: tightly combining the middle die (11) and the central support (6) by using a fastening clip (12); the through hole (13) on the fastening clip (12) is used for clamping;
and a sixth step: after the middle mold (11) and the central support (6) are closed, the upper sealing gasket (4) is placed at the edge of the upper part of the central support (6);
the seventh step: the upper die cover (1) and the central support (6) are matched, the central shaft (3) and the central positioning hole (14) are matched, a silicone oil isolating agent is coated on the surface layer of the upper die cover by using a coating brush, the high styrene butadiene styrene skeleton primer is placed at the bottom of the die cavity, and then the elastic rubber is filled; meanwhile, an upper positioning hole (19) of the upper die cover (1) is tightly matched with the corresponding upper positioning pin (5); applying downward uniform force on the upper die cover (1) for pressing, and completing die assembly; and (5) after die assembly, carrying out pressure vulcanization by using a flat vulcanizing machine to finish casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451147.6A CN107030951B (en) | 2017-06-15 | 2017-06-15 | Slurry pump bionic piston casting forming method and forming device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710451147.6A CN107030951B (en) | 2017-06-15 | 2017-06-15 | Slurry pump bionic piston casting forming method and forming device |
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| Publication Number | Publication Date |
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| CN107030951A CN107030951A (en) | 2017-08-11 |
| CN107030951B true CN107030951B (en) | 2023-04-11 |
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| CN115157560A (en) * | 2022-06-30 | 2022-10-11 | 中煤科工集团西安研究院有限公司 | Manufacturing tool and forming process of sweat gland imitating leather cup for slurry pump |
| CN114992115B (en) * | 2022-06-30 | 2024-04-05 | 中煤科工集团西安研究院有限公司 | Sweat gland imitation self-compensating lubricating piston for slurry pump |
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| US20040256765A1 (en) * | 2003-06-18 | 2004-12-23 | Millennium Mat Company | Method and system for making a slip resistant mat |
| JP4455093B2 (en) * | 2004-02-20 | 2010-04-21 | キヤノン株式会社 | Mold, processing apparatus using mold, and processing method using mold |
| CN101402235B (en) * | 2008-11-19 | 2010-09-15 | 上海工程技术大学 | Thermosetting plastics flat-plate shaped molding, temperature-evening hot-die mould device and production method thereof |
| CN206796350U (en) * | 2017-06-15 | 2017-12-26 | 吉林大学 | A kind of bionical casting for piston shaped device of slush pump |
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