WO2019098974A2 - Stellite coating of ejectors used in hot forging press - Google Patents
Stellite coating of ejectors used in hot forging press Download PDFInfo
- Publication number
- WO2019098974A2 WO2019098974A2 PCT/TR2018/050463 TR2018050463W WO2019098974A2 WO 2019098974 A2 WO2019098974 A2 WO 2019098974A2 TR 2018050463 W TR2018050463 W TR 2018050463W WO 2019098974 A2 WO2019098974 A2 WO 2019098974A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ejector
- hot
- stellite
- forging press
- hot forging
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
Definitions
- the invention is related to the ejector part with a housing on the tip, which removes the hot part formed between the punch, front die and the back die in forging operation performed by using closed mold in hot forging press.
- the invention is related to the ejector of with the front part filled with stellite, which is a cobalt based filler material, by using PTA (Plasma Transfer Arc) welding inside the front part that contacts the hot part in order to prevent abrasion of ejectors at high temperatures.
- PTA Pulsma Transfer Arc
- the hot part formed between the punch, front die and the back die is removed by the ejector ( Figure-l).
- the tip of the ejector used in this operation which contacts the hot part is subjected to abrasion due to high temperatures. Therefore, the tip of the ejector that contacts the hot part is coated with stellite that is a cobalt based filler material by using PTA (Plasma Transfer Arc) welding.
- the excess stellite is pre-bored and then subjected to heat treatment. After the heat treatment, the ejector is machined to its final dimensions.
- the stellite at the tip of the ejector as prepared in Figure 2a expands to sides due to the load acting on the mold by the pressing during the forging operation ( Figure 2b).
- the stellite filling expands and causes breaks by scratching/smearing the back die during removal operation.
- a casting system that comprises of a plurality of mold components which define a mold space, metal transfer system and a parts removal system configured to receive the molten metal is described.
- the ejectors contain high temperature system material. These high temperature materials may be nickel based super alloys, cobalt based super alloys, iron-nickel based super alloys. Mar- M-509 and Stellite 31 are among the cobalt based alloys.
- a ejector developed for hot mold forging press mold is mentioned.
- the ejector developed in the invention comprises of a ejector rod and a ejector rod reciprocation mechanism.
- the invention is the bolt mold module that comprises the positive ejector which enables pressing of the head connection block of the bolt mill of the bolt roughcast by the force applied in Y- axis and the mold connection block which enables connection of said positive ejector; wherein comprising the mold having mold hole centered with the mold connection block in the y-axis and head mold at various forms located between the brand mold at various forms centered inside the upper head connection block which enables forming the pressed bolt mill at different head forms and which enables burr-free production during forming.
- Japanese patent document No. JP2003074305 of the known state of the art turbine blades welded with stellite are mentioned.
- stellite coating of the ejectors used in hot forging press is not mentioned and it is not referenced that stellite coatings can cause breaks.
- the object of this invention is to realize a heat resisting and long-lasting ejector that is used in forging operations performed by using closed molds in hot forging press.
- Another object of this invention is to realize a ejector that is used in forging operations performed by using closed molds in hot forging presses, where stellite which is filler material is filled into the housing at its tip and therefore which becomes long lasting and heat resistant.
- Figure l is the cross-sectional view of the closed mold used in hot forging press of the previous art.
- Figure 2a is the pre-weld cross-sectional view of the closed mold used in hot forging press of the previous art.
- Figure 2b is the post-weld cross-sectional view of the closed mold used in hot forging press of the previous art.
- Figure 2c is the cross-sectional view of the closed mold used in forging press of the previous art after the filler material is brought to final dimensions.
- Figure 3 is the cross-sectional view of the closed mold used in hot forging press of the present invention.
- Figure 4a is the pre-weld cross-sectional view of the closed mold used in hot forging press of the present invention.
- Figure 4b is the post-weld cross-sectional view of the closed mold used in hot forging press of the present invention.
- Figure 4c is the cross-sectional view of the closed mold used in forging press of the present invention after the filler material is brought to final dimensions.
- the invention is the closed mold used in a hot forging press that comprises, the punch (2) which shapes the hot part (1) to be forged, the frontdie (3) which is around the punch (2), shaping the hot part (1) to be forged,
- the back die (4) which is below the front die (3), shaping the hot part (1) to be forged, wherein comprising; the ejector (7) that removes the hot part (1) shaped between the punch (2), the front die (3) and the back die (4), that is filled with stellite which is the cobalt based filler material by using PTA (Plasma Transfer Arc) welding at the tip contacting the hot part (1) and that contains the housing (6) so that providing volume for stellite coating.
- PTA Pullasma Transfer Arc
- the invention is the closed mold used in a hot forging press, which comprises water channels (9) in order to enable the cooling water to enter via the water inlet (8) located under the ejector (7) and being conveyed to the ends and sides of the ejector
- stellite which is a cobalt based filler material is filled into the housing (6) by using PTA (Plasma Transfer Arc) welding such that it penetrates into the ejector (7).
- the closed mold becomes ready to use.
- the closed mold which is ready to be used is subjected the hot forging process in the press. After this process, the excess stellite coating (5) is pre-machined and the sent to heat treatment. At the end of the heat treatment, the ejector (7) is machined to its final dimensions.
- the stellite coating (5) put into the housing (6) does not expand towards the edges after pressing and does not spread into the gap between the ejector (7) and the back die (4). Therefore, while the hot part (1) is being removed, the ejector (7) does not contact the back die (4) and does not cause any breaks.
- the ejectors (7) resist heat and does not cause any damage in the closed mold during removal of the hot part (1).
Abstract
The invention is related to the ejector (7) filled with stellite, which is a cobalt based filler material, by using PTA (Plasma Transfer Arc) welding inside the tip housing (6) that contacts the hot part (1) in order to prevent abrasion of ejectors at high temperatures during forging process performed by using closed mold in hot forging press.
Description
STELLITE COATING OF EJECTORS USED IN HOT FORGING PRESS
Technical Field
The invention is related to the ejector part with a housing on the tip, which removes the hot part formed between the punch, front die and the back die in forging operation performed by using closed mold in hot forging press.
More specifically, the invention is related to the ejector of with the front part filled with stellite, which is a cobalt based filler material, by using PTA (Plasma Transfer Arc) welding inside the front part that contacts the hot part in order to prevent abrasion of ejectors at high temperatures.
Background of the Invention
During the forging operation performed by using closed mold in hot forging press, the hot part formed between the punch, front die and the back die is removed by the ejector (Figure-l). The tip of the ejector used in this operation which contacts the hot part is subjected to abrasion due to high temperatures. Therefore, the tip of the ejector that contacts the hot part is coated with stellite that is a cobalt based filler material by using PTA (Plasma Transfer Arc) welding.
As a result of the coating, as can be seen in Figures 2b and 2c, the excess stellite is pre-bored and then subjected to heat treatment. After the heat treatment, the ejector is machined to its final dimensions.
However, the stellite at the tip of the ejector as prepared in Figure 2a expands to sides due to the load acting on the mold by the pressing during the forging operation (Figure 2b). During this expansion, in the space between the ejector and the back
die, the stellite filling expands and causes breaks by scratching/smearing the back die during removal operation.
Such stellite breaks reduces the life of the ejectorand also causes overlaps and damages on the mold. Various improvements have been done related to ejector used in the current state of the hot forging press art.
In the European patent document No. EP2450126 of the known state of the art, a casting system that comprises of a plurality of mold components which define a mold space, metal transfer system and a parts removal system configured to receive the molten metal is described. In the invention, it is stated that the ejectors contain high temperature system material. These high temperature materials may be nickel based super alloys, cobalt based super alloys, iron-nickel based super alloys. Mar- M-509 and Stellite 31 are among the cobalt based alloys.
In the Chinese patent document No. CN203565744 of the known state of the art, a ejector developed for hot mold forging press mold is mentioned. The ejector developed in the invention comprises of a ejector rod and a ejector rod reciprocation mechanism.
In the Turkish patent document No. 2015/11363 of the known state of the art, flashless (burr-free) hot bolt forging method is described. The invention is the bolt mold module that comprises the positive ejector which enables pressing of the head connection block of the bolt mill of the bolt roughcast by the force applied in Y- axis and the mold connection block which enables connection of said positive ejector; wherein comprising the mold having mold hole centered with the mold connection block in the y-axis and head mold at various forms located between the brand mold at various forms centered inside the upper head connection block which enables forming the pressed bolt mill at different head forms and which enables burr-free production during forming.
In the Japanese patent document No. JP2003074305 of the known state of the art, turbine blades welded with stellite are mentioned.
However, in the illustrated documents, stellite coating of the ejectors used in hot forging press is not mentioned and it is not referenced that stellite coatings can cause breaks.
Therefore, there exists a need for developing a long lasting, heat resisting ejector to be used in hot forging presses that has a housing at its tip and that is filled with stellite which is a cobalt based filler material by PTA (Plasma Transfer Arc) welding. Objects of the Invention
The object of this invention is to realize a heat resisting and long-lasting ejector that is used in forging operations performed by using closed molds in hot forging press.
Another object of this invention is to realize a ejector that is used in forging operations performed by using closed molds in hot forging presses, where stellite which is filler material is filled into the housing at its tip and therefore which becomes long lasting and heat resistant.
Detailed Description of the Invention
The ejector used in closed molds in the hot forging press realized for achieving the object of the invention is shown in appended figures. Within these Figures;
Figure l:is the cross-sectional view of the closed mold used in hot forging press of the previous art.
Figure 2a:is the pre-weld cross-sectional view of the closed mold used in hot forging press of the previous art.
Figure 2b:is the post-weld cross-sectional view of the closed mold used in hot forging press of the previous art.
Figure 2c:is the cross-sectional view of the closed mold used in forging press of the previous art after the filler material is brought to final dimensions. Figure 3:is the cross-sectional view of the closed mold used in hot forging press of the present invention.
Figure 4a: is the pre-weld cross-sectional view of the closed mold used in hot forging press of the present invention.
Figure 4b: is the post-weld cross-sectional view of the closed mold used in hot forging press of the present invention.
Figure 4c: is the cross-sectional view of the closed mold used in forging press of the present invention after the filler material is brought to final dimensions.
The parts in the figures are individually given reference numbers and these numbers refer to:
1. Hot part
2. Punch
3. Front die
4. Back die
5. Stellite coating
6. Housing
7. Ejector
8. Water inlet
9. Water channels
The invention is the closed mold used in a hot forging press that comprises, the punch (2) which shapes the hot part (1) to be forged,
the frontdie (3) which is around the punch (2), shaping the hot part (1) to be forged,
the back die (4) which is below the front die (3), shaping the hot part (1) to be forged, wherein comprising; the ejector (7) that removes the hot part (1) shaped between the punch (2), the front die (3) and the back die (4), that is filled with stellite which is the cobalt based filler material by using PTA (Plasma Transfer Arc) welding at the tip contacting the hot part (1) and that contains the housing (6) so that providing volume for stellite coating.
The invention is the closed mold used in a hot forging press, which comprises water channels (9) in order to enable the cooling water to enter via the water inlet (8) located under the ejector (7) and being conveyed to the ends and sides of the ejector
(7). In the closed mold used in the hot forging press developed by the invention, there is a housing (6) on the ejector (7) which removes the hot shaped hot part (1) formed between the punch (2), front die (3) and the back die (4) from the back die (4). This housing (6) is at the tip of the ejector (7) which is in contact with the hot part (1).
In order to let the ejector (7) resist abrasion at high temperatures, stellite which is a cobalt based filler material is filled into the housing (6) by using PTA (Plasma Transfer Arc) welding such that it penetrates into the ejector (7).
After the housing (6) is coated with stellite (5), the closed mold becomes ready to use.
The closed mold which is ready to be used is subjected the hot forging process in the press. After this process, the excess stellite coating (5) is pre-machined and the
sent to heat treatment. At the end of the heat treatment, the ejector (7) is machined to its final dimensions.
Thus, the stellite coating (5) put into the housing (6) does not expand towards the edges after pressing and does not spread into the gap between the ejector (7) and the back die (4). Therefore, while the hot part (1) is being removed, the ejector (7) does not contact the back die (4) and does not cause any breaks.
Hence, in the closed forging molds developed according to the invention, the ejectors (7) resist heat and does not cause any damage in the closed mold during removal of the hot part (1).
Claims
1. The invention is the closed mold used in a hot forging press that comprises, the punch (2) which shapes the hot part (1) to be forged,
the front die (3) which is around the punch (2), shaping the hot part (1) to be forged,
the back die (4) which is below the front die (3), shaping the hot part (1) to be forged, characterized by comprising; theejector (7) that removes the hot part (1) shaped between the punch (2), the front die (3) and the back die (4), that is filled with stellite which is the cobalt based filler material by using PTA (Plasma Transfer Arc) welding at the tip contacting the hot part (1) and that contains the housing (6) so that providing volume for stellite coating.
2. The closed mold used in a hot forging press according to Claim 1; characterized by comprising water channels (9) in order to enable the cooling water to enter via the water inlet (8) located under the ejector (7) and being conveyed to the ends and sides of the ejector (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2017/13956 | 2017-09-20 | ||
| TR201713956 | 2017-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2019098974A2 true WO2019098974A2 (en) | 2019-05-23 |
| WO2019098974A3 WO2019098974A3 (en) | 2019-09-19 |
Family
ID=66537844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2018/050463 WO2019098974A2 (en) | 2017-09-20 | 2018-09-04 | Stellite coating of ejectors used in hot forging press |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2019098974A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680949A (en) * | 2021-08-20 | 2021-11-23 | 江苏兴锻智能装备科技有限公司 | Lower ejection device of hot die forging press |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB754495A (en) * | 1953-07-01 | 1956-08-08 | Bayerisches Leichtmetallwerk A | Improvements in method of an apparatus for hot forging toothed wheels |
| CN202571126U (en) * | 2012-03-14 | 2012-12-05 | 浙江中集铸锻有限公司 | Forming die for tower piece of bearing ring |
| CN202752518U (en) * | 2012-03-14 | 2013-02-27 | 浙江中集铸锻有限公司 | Separating punch of bearing ring |
-
2018
- 2018-09-04 WO PCT/TR2018/050463 patent/WO2019098974A2/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680949A (en) * | 2021-08-20 | 2021-11-23 | 江苏兴锻智能装备科技有限公司 | Lower ejection device of hot die forging press |
| CN113680949B (en) * | 2021-08-20 | 2023-08-04 | 江苏兴锻智能装备科技有限公司 | Lower liftout device of hot die forging press |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019098974A3 (en) | 2019-09-19 |
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