CN114381591A - Three-petal internal expansion mould - Google Patents
Three-petal internal expansion mould Download PDFInfo
- Publication number
- CN114381591A CN114381591A CN202111507095.2A CN202111507095A CN114381591A CN 114381591 A CN114381591 A CN 114381591A CN 202111507095 A CN202111507095 A CN 202111507095A CN 114381591 A CN114381591 A CN 114381591A
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- CN
- China
- Prior art keywords
- mould
- main shaft
- valve
- fixing plate
- clamping fixture
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- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000725 suspension Substances 0.000 description 6
- 230000008602 contraction Effects 0.000 description 5
- 239000008358 core component Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0006—Details, accessories not peculiar to any of the following furnaces
- C21D9/0025—Supports; Baskets; Containers; Covers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Sliding Valves (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention provides a three-flap internal expansion mould, which aims to reduce or eliminate deformation generated in the heat treatment production process of cylindrical parts, particularly thin-wall long cylindrical parts. A three-petal internal expansion mould comprises a mould upper fixing plate (5), a mould petal (6), a mould lower fixing plate (7), a mould petal bolt (8), a mould fixing plate key hole (10), a mould main shaft (11), a mould main shaft upper wedge-shaped boss (12) and a mould main shaft lower wedge-shaped boss (13); the cylindrical part is sleeved on the mould, the mould is lifted, the mould valve slides downwards under the action of gravity, the mould valve stops sliding downwards after contacting with the inner wall of the cylindrical part, and at the moment, the inclined planes of the upper end and the lower end of the inner wall of the mould valve are mutually contacted and fixed at the position with the inclined planes of the upper wedge-shaped boss and the lower wedge-shaped boss of the main shaft of the mould, so that the outer wall of the mould valve is tightly contacted with the inner wall of the cylindrical part. Thereby achieving the purpose of reducing or eliminating the deformation of the heat treatment.
Description
Technical Field
The invention relates to deformation correction of a cylindrical part in a heat treatment production process of a three-petal internal expansion mould. In particular to the correction of the deformation of thin-wall long cylinder parts in the annealing and tempering processes, belonging to the field of mechanical manufacture.
Background
At present, in the field of heat treatment, cylindrical parts, particularly thin-wall long cylindrical parts are easy to deform in the heat treatment production process, such as 'waisting' and 'distortion', and a hanging tool 'hoisting' furnace charging mode is generally adopted for preventing or correcting the deformation, so that the method can reduce the deformation amount, but the effect on the thin-wall long cylindrical parts is not ideal. In order to solve the problems, the invention provides a three-flap internal expansion mould.
The defects of the traditional technology are as follows:
the traditional hanging tool hoisting charging mode has obvious effect on reducing the deformation of cylindrical parts with small wall thickness and short body, but has no obvious effect on reducing the deformation of cylindrical parts with thin wall and long body, and particularly relates to parts which have high processing precision requirement and cannot be mechanically corrected subsequently. The three-piece internal expansion mould is adopted for hoisting and charging, so that the wall of the part is in close contact with the outer wall of the mould in the heat treatment process, the deformation caused by uneven stress is effectively avoided, and the purpose of reducing and eliminating heat treatment deformation or correcting deformation is achieved.
Disclosure of Invention
The purpose of the invention is as follows:
1. in order to reduce or eliminate deformation generated in the heat treatment production process of cylindrical parts, particularly thin-wall long cylindrical parts.
2. The deformed cylindrical zero part is corrected by heating.
Provides a three-flap internal expansion mould.
The invention is realized by the following technical scheme: a three-flap internal expansion mould is characterized in that; the clamping fixture comprises a lifting ring (1), a clamping fixture upper fixing plate (5), a clamping fixture valve (6), a clamping fixture lower fixing plate (7), a clamping fixture valve bolt (8), a clamping fixture valve and clamping fixture fixing plate nut (9), a clamping fixture fixing plate key hole (10), a clamping fixture main shaft (11), a clamping fixture main shaft upper wedge-shaped boss (12) and a clamping fixture main shaft lower wedge-shaped boss (13); the hoisting ring (1) is fixedly connected with a mould main shaft to form a whole and is used for transferring and fixing the mould; the upper section of the mould main shaft (1) is provided with a mould main shaft upper wedge-shaped boss (12), and the lower section of the mould main shaft (1) is provided with a mould main shaft lower wedge-shaped boss (13); the upper wedge-shaped boss (12) of the mould main shaft and the lower wedge-shaped boss (13) of the mould main shaft are wider at the lower part and narrower at the lower part, and an upper fixing plate (5) of the mould and a lower fixing plate (7) of the mould are respectively arranged up and down; the mould main shaft (1) can penetrate through the central holes of the mould upper fixing plate (5) and the mould lower fixing plate (7); the mould valves (6) are provided with three, and three circumferences are uniformly distributed; the inner wall of the mould valve is provided with an upper end inclined plane and a lower end inclined plane; the upper part and the lower part of three mould petals which are uniformly distributed on the circumference are respectively connected with a mould petal bolt (8); the mould valve bolts (8) connected with the mould valve (6) at the upper and lower positions respectively penetrate through the mould fixing plate key-shaped holes (10) on the mould upper fixing plate (5) and the mould lower fixing plate (7);
the key-shaped hole (10) of the clamping fixture fixing plate is a radial long round hole, so that the clamping fixture valve (6) can move along the radial direction of the radial long round hole beyond the center of a circle or the periphery.
Furthermore, a wedge-shaped boss (12) on the main shaft of the mould is a bulge of the upper section of the main shaft, and is in contact with the upper inclined plane of the mould valve during working, so that the effect of outward pressure can be exerted on the upper section of the mould valve (6).
Furthermore, the bulge of the middle lower section of the main shaft of the lower wedge-shaped boss (13) of the main shaft of the mould main shaft is in contact with the upper inclined plane of the mould valve during working, and the effect of outward pressure on the lower section of the mould valve (6) can be exerted.
Furthermore, the clamping device also comprises a main shaft clamping cover (4), wherein the main shaft clamping cover (4) is integrated with the mould main shaft (11) at the upper end of the main shaft (11).
Further, the lower die fixing plate 7 fixes the segment of the die valve, which is assembled to the die spindle 11, at a predetermined position.
Further, the suspension ring 1 is fixed on a main shaft bolt (2) of the clamping fixture by a nut 3.
Further, the spindle bolt 2 is connected with the suspension ring (1) through a nut (3) to form a whole.
Further, the method for carrying out heat treatment on the parts by using the three-petal internal expansion mould is characterized by comprising the following steps of; the cylindrical part is sleeved on the mould and positioned at the periphery of the upper mould valve (6), the mould is lifted, the mould valve slides downwards under the action of gravity, the mould valve stops sliding downwards after contacting with the inner wall of the cylindrical part, and at the moment, the inclined planes of the upper end and the lower end of the inner wall of the mould valve are contacted with the inclined planes of the upper wedge-shaped boss of the main shaft of the mould and the lower wedge-shaped boss of the main shaft of the mould, so that the outer wall of the mould valve is tightly contacted with the inner wall of the cylindrical part.
The invention has the beneficial effects that:
the invention has the advantages of simple manufacture, clear working principle, simple use and safe operation. The heat treatment deformation of the cylindrical parts can be effectively reduced or offset, and the deformed cylindrical parts can be corrected by heating.
Drawings
FIG. 1: front view of mould
FIG. 2: top view of clamping fixture
FIG. 3: section view of mould
Detailed Description
As shown in fig. 1, 2 and 3, the three-piece internal expansion mould of the invention comprises a suspension ring 1, a spindle bolt 2, a nut 3 for fixing the suspension ring and the spindle, a spindle clamping cover 4, an upper fixing plate 5 of the mould, a mould piece 6, a lower fixing plate 7 of the mould, a bolt 8 of the mould piece, a nut 9 for fixing the mould piece and the mould fixing plate, a key-shaped hole 10 of the mould fixing plate, a spindle 11 of the mould, an upper wedge-shaped boss 12 of the mould spindle and a lower wedge-shaped boss 13 of the mould spindle.
The hoisting ring 1 is fixed on a mould main shaft bolt 2 by a nut 3 and is integrated with a mould main shaft to transfer and fix the mould.
The main shaft bolt 2 is connected with the suspension ring 1 by the nut 3 to form a whole.
The nut 3 fixes the spindle bolt 2 and the suspension ring 1 together.
The main shaft clamping cover 4 is integrated with the main shaft 11 at the upper end of the main shaft 11, and the clamping fixture is fixed on the clamping fixture frame through heat treatment.
The upper fixture plate 5 of the mold combines the mold segments on the mold main shaft 11 by means of the mold segment bolts 8 through the nuts 3 to form the mold.
The mould valve 6 is one of the core components of the mould, and is combined on the mould main shaft 11 by the upper fixing plate 5 of the mould to form the mould.
The lower mold fixing plate 7 fixes the mold valve segments assembled to the mold main shaft 11 at predetermined positions.
The mold valve bolt 8 is fixed to the mold fixing upper plate 5 and the mold lower fixing plate 7 by the nut 3, and is combined with the main shaft 11 to form a mold.
The nut 9 fixes the mold piece 6 on the mold fixing plate.
The die holder plate key hole 10 allows the die flap bolt 8 to move on the die holder plate.
The mould main shaft 11 is one of the core components of the mould, and three mould valves 6 are combined together by the mould upper fixing plate 5 and the mould lower fixing plate 7 to form the mould, so that the mould plays roles of supporting and applying force.
The bulge at the upper end of the main shaft of the wedge-shaped boss 12 on the main shaft of the mould is contacted with the upper inclined plane of the mould valve during working, thereby playing the roles of fixing the position and applying pressure.
The lower wedge-shaped boss 13 of the mould main shaft is provided with a bulge at the middle lower end of the main shaft, and the bulge is in contact with the upper inclined plane of the mould valve during working, so that the fixing position and the pressure applying effect are realized.
The working principle of the invention is as follows:
the principle of gravity and expansion and contraction is utilized. The cylindrical part is sleeved on the mould, the mould is lifted, the mould valve slides downwards under the action of gravity, the mould valve stops sliding downwards after contacting with the inner wall of the cylindrical part, and at the moment, the inclined planes of the upper end and the lower end of the inner wall of the mould valve are mutually contacted and fixed at the position with the inclined planes of the upper wedge-shaped boss and the lower wedge-shaped boss of the main shaft of the mould, so that the outer wall of the mould valve is tightly contacted with the inner wall of the cylindrical part. When the cylindrical part, the mould main shaft and the mould valve are heated in the heat treatment process, the outer wall of the mould valve is in closer contact with the inner wall of the cylindrical part, and the mould valve supporting force can effectively reduce or offset the thermal stress of the cylindrical part, so that the purpose of reducing or eliminating the heat treatment deformation is achieved. Meanwhile, the deformation of the deformed cylinder-like part can be corrected by a heat treatment process by utilizing the principle of expansion with heat and contraction with cold.
The working process of the invention is as follows:
an operator flatly places the mould after assembling the mould, then moves the mould main shaft 11 downwards, so that the upper wedge-shaped boss 12 and the lower wedge-shaped boss 13 of the mould main shaft move to the position of a plane below the inclined plane of the mould valve 6, and the diameter of the mould is the minimum. Sleeving the cylindrical part outside the mould, then pushing a main shaft of the mould to increase the diameter of the mould until the outer surface of the mould valve 6 is tightly contacted with the inner wall of the cylindrical part, then hoisting the mould by using a crane, moving the mould valve 6 downwards under the action of gravity, further increasing the diameter of the mould, and enabling the outer surface of the mould valve 6 to be more tightly contacted with the inner wall of the cylindrical part. Then the mould is hung on the hanger frame and enters a furnace together for heat treatment, the outer surface of the mould valve 6 is contacted with the inner wall of the cylindrical part more tightly in the heating process according to the principle of expansion with heat and contraction with cold, so that the supporting force of the mould valve 6 can effectively reduce or offset the thermal stress of the cylindrical part, and the purpose of reducing or eliminating the heat treatment deformation is achieved. Meanwhile, the principle of expansion with heat and contraction with cold can be utilized to enable the thermal expansion force of the mould valve 6 to act on the inner wall of the deformed cylinder part, so that the deformation is corrected.
After the heat treatment, the hanger frame for hanging the clamping fixture and the workpiece is lifted out by a crane and placed at a flat position. After the mould is dried to room temperature and no thermal expansion or cold contraction occurs, the bolt 8 of the mould valve is unscrewed, then the mould valve 6 is pushed upwards, the diameter of the mould is reduced, and the cylindrical parts are dismounted.
Claims (8)
1. A three-flap internal expansion mould is characterized in that; the clamping fixture comprises a lifting ring (1), a clamping fixture upper fixing plate (5), a clamping fixture valve (6), a clamping fixture lower fixing plate (7), a clamping fixture valve bolt (8), a clamping fixture valve and clamping fixture fixing plate nut (9), a clamping fixture fixing plate key hole (10), a clamping fixture main shaft (11), a clamping fixture main shaft upper wedge-shaped boss (12) and a clamping fixture main shaft lower wedge-shaped boss (13);
the hoisting ring (1) is fixedly connected with a mould main shaft to form a whole and is used for transferring and fixing the mould;
the upper section of the mould main shaft (1) is provided with a mould main shaft upper wedge-shaped boss (12), and the lower section of the mould main shaft (1) is provided with a mould main shaft lower wedge-shaped boss (13); the upper wedge-shaped boss (12) of the mould main shaft and the lower wedge-shaped boss (13) of the mould main shaft are wider at the lower part and narrower at the lower part,
the upper fixing plate 5 and the lower fixing plate 7 of the mould are respectively arranged up and down; the mould main shaft (1) can penetrate through the central holes of the mould upper fixing plate (5) and the mould lower fixing plate (7);
the mould valves (6) are provided with three, and three circumferences are uniformly distributed; the inner wall of the mould valve is provided with an upper end inclined plane and a lower end inclined plane;
the upper part and the lower part of three mould petals which are uniformly distributed on the circumference are respectively connected with a mould petal bolt (8); the mould valve bolts (8) connected with the mould valve (6) at the upper and lower positions respectively penetrate through the mould fixing plate key-shaped holes (10) on the mould upper fixing plate (5) and the mould lower fixing plate (7);
the key-shaped hole (10) of the clamping fixture fixing plate is a radial long round hole, so that the clamping fixture valve (6) can move along the radial direction of the radial long round hole beyond the center of a circle or the periphery.
2. A three-piece internal expansion mold as claimed in claim 1, wherein; the wedge-shaped boss (12) on the mould main shaft is a bulge of the upper section of the main shaft, and is in contact with the upper inclined plane of the mould valve during working, so that the effect of outward pressure can be exerted on the upper section of the mould valve (6).
3. A three-piece internal expansion mold as claimed in claim 1, wherein; the bulge of the middle lower section of the main shaft of the lower wedge-shaped boss (13) of the main shaft of the mould is contacted with the upper inclined plane of the mould valve during working, and can exert the effect of outward pressure on the lower section of the mould valve (6).
4. A three-piece internal expansion mold as claimed in claim 1, wherein; the clamping device also comprises a main shaft clamping cover (4), wherein the main shaft clamping cover (4) is integrated with the mould main shaft (11) at the upper end of the main shaft (11).
5. A three-piece internal expansion mold as claimed in claim 1, wherein; the lower mold fixing plate 7 fixes the mold valve segments assembled to the mold main shaft 11 at predetermined positions.
6. A three-piece internal expansion mold as claimed in claim 1, wherein; the lifting ring 1 is fixed on a main shaft bolt (2) of the clamping fixture by a nut 3.
7. A three-piece internal expansion mold as claimed in claim 1, wherein; the main shaft bolt 2 is connected with the hanging ring (1) by a nut (3) to form a whole.
8. The method for heat treatment of parts by using the three-piece internal expansion mould as claimed in claim 1, wherein; the cylindrical part is sleeved on the mould and positioned at the periphery of the upper mould valve (6), the mould is lifted, the mould valve slides downwards under the action of gravity, the mould valve stops sliding downwards after contacting with the inner wall of the cylindrical part, and at the moment, the inclined planes of the upper end and the lower end of the inner wall of the mould valve are contacted with the inclined planes of the upper wedge-shaped boss of the main shaft of the mould and the lower wedge-shaped boss of the main shaft of the mould, so that the outer wall of the mould valve is tightly contacted with the inner wall of the cylindrical part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111507095.2A CN114381591B (en) | 2021-12-10 | 2021-12-10 | Three-valve internal expansion mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111507095.2A CN114381591B (en) | 2021-12-10 | 2021-12-10 | Three-valve internal expansion mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114381591A true CN114381591A (en) | 2022-04-22 |
| CN114381591B CN114381591B (en) | 2024-08-16 |
Family
ID=81195739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111507095.2A Active CN114381591B (en) | 2021-12-10 | 2021-12-10 | Three-valve internal expansion mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114381591B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011052546A1 (en) * | 2011-08-10 | 2013-02-14 | Hartmut Schmid | Device for quick changing power-operated clamping tool i.e. collet chuck, to spindle of machine tool, has clamping sleeve moved during clamping operation, and clamping bolt radially moved, so that bolt is in engagement with pins or ring |
| CN108161507A (en) * | 2017-12-26 | 2018-06-15 | 西安航空学院 | A kind of large size, thin walled cylinder part bulging tooling and clamping method |
| CN210435400U (en) * | 2019-09-06 | 2020-05-01 | 长春武玉汽车配件有限公司 | Self-centering spindle head turning expandable core pneumatic clamping mould |
-
2021
- 2021-12-10 CN CN202111507095.2A patent/CN114381591B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011052546A1 (en) * | 2011-08-10 | 2013-02-14 | Hartmut Schmid | Device for quick changing power-operated clamping tool i.e. collet chuck, to spindle of machine tool, has clamping sleeve moved during clamping operation, and clamping bolt radially moved, so that bolt is in engagement with pins or ring |
| CN108161507A (en) * | 2017-12-26 | 2018-06-15 | 西安航空学院 | A kind of large size, thin walled cylinder part bulging tooling and clamping method |
| CN210435400U (en) * | 2019-09-06 | 2020-05-01 | 长春武玉汽车配件有限公司 | Self-centering spindle head turning expandable core pneumatic clamping mould |
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| Publication number | Publication date |
|---|---|
| CN114381591B (en) | 2024-08-16 |
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