CN110434314B - Vacuum suction casting mold positioning structure using diaphragm cylinder to fix positioning pin - Google Patents
Vacuum suction casting mold positioning structure using diaphragm cylinder to fix positioning pin Download PDFInfo
- Publication number
- CN110434314B CN110434314B CN201810441759.1A CN201810441759A CN110434314B CN 110434314 B CN110434314 B CN 110434314B CN 201810441759 A CN201810441759 A CN 201810441759A CN 110434314 B CN110434314 B CN 110434314B
- Authority
- CN
- China
- Prior art keywords
- pin
- suction casting
- diaphragm cylinder
- pipe
- vacuum suction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005266 casting Methods 0.000 title claims abstract description 41
- 238000007789 sealing Methods 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Manipulator (AREA)
Abstract
The invention relates to a vacuum suction casting mold positioning structure utilizing a diaphragm cylinder to fix a positioning pin. The vacuum suction casting mould is placed in the suction casting chamber, the sprue channel of the mould is aligned with the lift pipe orifice of the suction casting chamber, so that molten iron is sucked into the cavity from the crucible, because the sprue is arranged at the bottom of the mould, the alignment state with the lift pipe orifice cannot be directly observed, and a long locating pin is arranged in the lift pipe, extends into the lift pipe from the bottom of the lift pipe and is exposed out from the upper end of the lift pipe for positioning the mould.
Description
Technical Field
Device for positioning casting mould by vacuum suction casting technology of antigravity pouring method in casting industry
Background
Vacuum suction casting is a method of antigravity pouring, a casting mould is placed in a suction casting chamber in a vacuum state, a liquid lifting pipe of the suction casting chamber sucks molten iron from a crucible below for filling, the vacuum state is used for generating pressure difference between the surface of the molten iron in the crucible and a cavity, the molten iron is sucked into the cavity in a negative pressure state, and the filling is free from resistance and has a certain feeding function. Before suction casting, the casting mould is aligned with the suction casting chamber in the suction casting chamber, the lower liquid lift pipe is sealed, the inner hole of the liquid lift pipe is communicated with the cavity and sealed with the outside to prevent molten iron from leaking, but the sprue of the casting mould is opened at the bottom of the casting mould and is not easy to observe, and a positioning device is arranged at the bottom of the casting mould and is fully close to the bottom of the suction casting chamber to ensure that the sprue is aligned with the liquid lift pipe.
The casting mould is placed in the suction casting chamber, and is easy to shake when being lifted by a crane, and the positioning device cannot be seen, so that positioning deviation is easy to occur, and sealing failure accidents are generated. The existing method is to install an ultra-long locating pin upwards at the bottom of a lift tube, so that a casting mold bottom hole and the locating pin are aligned to a locating method, and the lift tube is squeezed and cracked in a trial process, so that the method fails. The main method is that 1, a locating pin must pass through the lift tube from the bottom of the lift tube upwards and exceed a certain height at the upper end of the lift tube to be used as a casting mold for locating, the total length of the lift tube is 550mm, the length of the locating pin is about 700mm, the bottom of the locating pin is welded on a supporting base, and the bottom surface of a suction casting lower chamber is placed on an upper frame of the supporting base. After the installation requires the lift tube to be sleeved in place on the locating pin, the circumferential bottom surface of the flange at the upper end part of the lift tube is required to be in full contact with the locating base of the suction casting lower chamber, the locating base of the suction casting lower chamber is installed at the upper part of the bottom surface of the lower chamber, the bottom surface of the suction casting lower chamber is placed on the upper frame of the supporting base, the supporting base is of a profile welding structure, the locating pin is welded on the lower frame of the supporting base, and the locating pin cannot be guaranteed to keep a vertical relationship with the locating base of the suction casting lower chamber, so that the installation is one of the installation requirements; 2. the direction of the lift tube is actually guided by the locating pin, the inner diameter of the lift tube and the outer diameter of the locating pin are only 1-2 mm, and the perpendicularity of the lift tube on the whole length of the lift tube is only smaller than 0.06-0.10 mm, so that the lift tube can be used for fixing the locating pin on the lift tube sleeve in place, and the flange at the end part of the lift tube is pressed by the fixed cover plate so that the lower plane of the flange is fully contacted with the locating base of the suction casting lower chamber to realize sealing.
Because the locating pin and the locating base of the suction casting lower chamber can not keep the vertical range in welding, a gap is necessarily formed between the flange of the liquid lifting pipe and the locating base, when the flange is pressed by the gland, part of the flange edge is pressed to generate a bending moment on the flange because the liquid lifting pipe is made of brittle ceramic material, and when the pressure exceeds the material damage stress, the liquid lifting pipe is locally broken; 3. the suction casting lower chamber and the casting mould are lifted away from the supporting base by the crane after being mounted, the lifting direction of the crane is not consistent with the straight line of the positioning pin, and the suspension rope shakes.
Disclosure of Invention
The invention aims to cancel the guiding of an ultra-long locating pin to a lift tube, and fix a locating pin from the upper hole end of the lift tube to locate a casting mould. After the positioning pin is shortened, the positioning pin is fixed at the flange end of the upper part of the lift tube, the positioning pin is fixed in the hole of the end part of the lift tube by adopting the inflation of the diaphragm cylinder, when the casting mold is placed, the air in the diaphragm is discharged, and the positioning pin is separated from the bottom of the lift tube and taken out.
The technical scheme is as follows: a vacuum suction casting mold positioning structure using a diaphragm cylinder to fix a positioning pin. The locating pin is divided into a guide pin and a fixed pin, and the outer part of the guide pin is tapered and is in threaded connection with the pin. The fixing pin is hollow, three rectangular openings are formed in the outer diameter cylindrical surface in a three-equal-dividing mode, internal threads are formed in the opening of the bottom surface, a sealing cover is installed, an annular gasket is tightly pressed on the end surface of the sealing cover, the gasket tightly presses the end flange edge of the rubber diaphragm cylinder on the flange edge of the fixing pin, the three-equal-dividing modes of the diaphragm cylinder tightly press the working surface, when the diaphragm cylinder is inflated, the diaphragm cylinder stretches out of the three openings of the same pin, a pipe joint is installed in the middle of the sealing cover, the pipe joint is connected with a plastic air pipe, and the air pipe stretches out of the pipe at the bottom of the lift pipe and is connected with an air source through a quick-change connector.
The invention has the remarkable effects that the lift tube is not influenced by the guidance of the ultra-long locating pin on the whole length, the end flange and the suction casting lower chamber can be fully contacted when fixed, the flange can not receive bending stress, the diaphragm cylinder is deflated and retracted in the locating pin after installation, the locating pin can be separated from the lift tube because of a gap of 1-2 mm, the lift tube does not have any collision extrusion in the lifting process, and the intact lift tube is ensured when the casting mould is positioned.
Drawings
Fig. 1 is a cross-sectional view of a dowel pin securing structure.
Fig. 2 is a cross-sectional view A-A of fig. 1.
Wherein, 1, a lift tube 2, a fixing pin 3, a guide pin 4, a diaphragm cylinder 5, a sealing cover 6, an annular gasket 7, a pipe joint 8, a plastic air pipe K and a compacting working surface
Detailed Description
A vacuum suction casting mold positioning structure using a diaphragm cylinder to fix a positioning pin. The locating pin is divided into a guide pin 3 and a fixed pin 2, the guide pin 3 is tapered and is connected with the fixed pin 2 by screw threads, the fixed pin 2 is hollow, three rectangular openings are formed in the outer diameter cylindrical surface in a three-way mode, and internal threads are formed in the opening of the bottom surface. The sealing cover 5 is installed, an annular gasket 6 is tightly pressed on the end plane of the sealing cover 5, the gasket 6 tightly presses the end flange edge of the rubber diaphragm cylinder 4 on the flange edge of the fixed pin 2, the sealing cover 5 is used for tightly pressing the three trisection pressing working faces K of the diaphragm cylinder 4, when the three trisection pressing working faces K are inflated, the sealing cover stretches out of the three rectangular openings of the same pin 2 to press the inner hole of the lift tube 1 to realize positioning, the pipe joint 7 is installed in the middle of the sealing cover 5, the pipe joint 7 is connected with a plastic air pipe 8, and the air pipe 8 stretches out of the pipe from the bottom of the hole of the lift tube 1 and is connected with an air source through a quick-change connector.
Claims (1)
1. A vacuum suction casting mold positioning structure using a diaphragm cylinder to fix a positioning pin is characterized in that: the locating pin is divided into a guide pin and a fixed pin, the guide pin is provided with taper and is connected with the fixed pin through threads, the fixed pin is hollow, three rectangular openings are formed in the outer diameter cylindrical surface in a three-equal-division mode, an internal thread is formed in the opening of the bottom surface, a sealing cover is installed, an annular gasket is tightly pressed on the end plane of the sealing cover, the gasket tightly presses the flange edge of the end part of a rubber diaphragm cylinder on the flange edge of the fixed pin, three trisection parts of the diaphragm cylinder tightly press working surfaces, a pipe joint is installed in the middle of the sealing cover and extends out of the three openings of the fixed pin during inflation, the pipe joint is connected with a plastic air pipe, and the air pipe extends out of the pipe at the bottom of a riser tube and is connected with an air source joint through a quick-change joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810441759.1A CN110434314B (en) | 2018-05-02 | 2018-05-02 | Vacuum suction casting mold positioning structure using diaphragm cylinder to fix positioning pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810441759.1A CN110434314B (en) | 2018-05-02 | 2018-05-02 | Vacuum suction casting mold positioning structure using diaphragm cylinder to fix positioning pin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110434314A CN110434314A (en) | 2019-11-12 |
| CN110434314B true CN110434314B (en) | 2024-04-09 |
Family
ID=68428079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810441759.1A Active CN110434314B (en) | 2018-05-02 | 2018-05-02 | Vacuum suction casting mold positioning structure using diaphragm cylinder to fix positioning pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110434314B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446322B (en) * | 2021-07-26 | 2022-06-14 | 太原重工股份有限公司 | End shield box cover device of oil film bearing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202951987U (en) * | 2012-09-21 | 2013-05-29 | 上海航天精密机械研究所 | Circular-seam butt joint positioning device with thin walled tube structure |
| CN203868027U (en) * | 2014-06-10 | 2014-10-08 | 吕金昌 | Pneumatic pipe hole positioning cylinder |
| CN206500601U (en) * | 2017-02-14 | 2017-09-19 | 骏发实业（河源）有限公司 | A kind of die positioning structure of die casting machine |
| CN208146896U (en) * | 2018-05-02 | 2018-11-27 | 科华控股股份有限公司 | Utilize the suction pouring casting mold location structure of diaphragm type cylinder fixed locating stud |
-
2018
- 2018-05-02 CN CN201810441759.1A patent/CN110434314B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202951987U (en) * | 2012-09-21 | 2013-05-29 | 上海航天精密机械研究所 | Circular-seam butt joint positioning device with thin walled tube structure |
| CN203868027U (en) * | 2014-06-10 | 2014-10-08 | 吕金昌 | Pneumatic pipe hole positioning cylinder |
| CN206500601U (en) * | 2017-02-14 | 2017-09-19 | 骏发实业（河源）有限公司 | A kind of die positioning structure of die casting machine |
| CN208146896U (en) * | 2018-05-02 | 2018-11-27 | 科华控股股份有限公司 | Utilize the suction pouring casting mold location structure of diaphragm type cylinder fixed locating stud |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110434314A (en) | 2019-11-12 |
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