CN114309373A - TC4 alloy thick-wall high-cylinder ring rolling forming method - Google Patents
TC4 alloy thick-wall high-cylinder ring rolling forming method Download PDFInfo
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- CN114309373A CN114309373A CN202011053793.5A CN202011053793A CN114309373A CN 114309373 A CN114309373 A CN 114309373A CN 202011053793 A CN202011053793 A CN 202011053793A CN 114309373 A CN114309373 A CN 114309373A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000956 alloy Substances 0.000 title claims abstract description 28
- 238000005096 rolling process Methods 0.000 title claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 25
- 238000005242 forging Methods 0.000 claims abstract description 25
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 8
- 238000004321 preservation Methods 0.000 claims description 15
- 239000003921 oil Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
The invention discloses a roll forming method of a TC4 alloy thick-wall high-cylinder ring piece, wherein the used titanium alloy material is a TC4 alloy, and the roll forming method is characterized in that: and (3) carrying out axial drawing on the ring blank sleeved on the core roller by adopting a special tool to obtain a reasonable intermediate blank, and then carrying out rolling forming. The defects of insufficient filling of the thick-wall high-cylinder ring piece and the like caused by small rolling ratio are overcome, and the thick-wall high-cylinder ring piece forging can be rapidly and accurately processed. The forging forming method is mainly used for forging and forming the thick-wall high-cylinder ring piece.
Description
Technical Field
The invention relates to a forging forming method, in particular to a roll forming method of a TC4 alloy thick-wall high-cylinder ring piece.
Background
Ring forgings with wall thicknesses of more than 70mm and barrel heights of more than 1.5m are often referred to as thick-walled high barrel ring forgings. The conventional production method of the common ring forging comprises the following steps: the method comprises the following steps of taking blank steel as a raw material, blanking, upsetting, punching, and then rolling a ring on a ring rolling machine through a core roller and a main roller to obtain the steel; however, the above production method cannot be used for manufacturing thick-walled high cylindrical ring forgings for the following reasons: 1. when the blank with short length, large outer diameter and small inner diameter is subjected to ring rolling, the height of the ring forging can be increased by expanding the inner diameter, but the inner diameter of the ring forging cannot be expanded synchronously with the increase of the height of the ring forging due to the small rolling ratio of the thick-wall high-cylinder ring forging, so that the thick-wall high-cylinder ring forging cannot be completely molded. 2. When the blank steel which is similar to the shape of the thick-wall high-cylindrical ring forging piece is adopted for forging, the length of the upper punch of the oil press is limited, so that a through hole cannot be punched on the blank, and the blank cannot be rolled on a ring rolling machine.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a forging and forming method of a titanium alloy thick-wall high-cylinder ring piece, which adopts a special tool to axially elongate a ring blank sleeved on a core roller to obtain a reasonable intermediate blank, and then rolls and forms the intermediate blank.
In order to solve the problems, the method for roll forming the TC4 alloy thick-wall high-cylinder ring piece uses a TC4 alloy as a titanium alloy material, and comprises the following forging steps:
1) placing the TC4 alloy blank obtained by blanking in a heating furnace, wherein the highest furnace temperature in the furnace is less than or equal to 600 ℃, then heating the heating furnace to 20 ℃ below the transformation point, and preserving heat according to 0.6min/mm of the effective thickness;
2) chamfering and rounding the heated TC4 alloy blank by using an oil press, then upsetting the blank by using the oil press, wherein the upsetting ratio is more than or equal to 2.3, returning the upset blank to the furnace, and preserving heat according to 0.4min/mm of the effective thickness, wherein the heat preservation temperature is 20 ℃ below the phase transformation point;
3) punching a through hole on the blank after upsetting by using an oil press to obtain a primary blank, then returning the primary blank to the furnace for heat preservation, preserving the heat according to the effective thickness of 0.4min/mm, and preserving the heat at the temperature of 20 ℃ below the phase transition point;
4) drawing out a primary blank sleeved on a mandrel by using a special tool on an oil press, wherein the mandrel needs to be preheated to 200-250 ℃ before drawing out and coated with a lubricant, during the drawing out process, the single-side rolling reduction of an upper anvil is 30-60 mm each time, the drawing-out ratio is more than or equal to 2.0, a secondary blank is obtained, the secondary blank is returned to a furnace for heat preservation, the heat preservation is carried out according to the effective thickness of 0.4min/mm, and the heat preservation temperature is 20 ℃ below the phase transition point;
5) and (3) rolling the secondary blank by using a cylindrical main roller and a cylindrical core roller on a ring rolling machine to finally obtain the thick-wall high-cylindrical ring forging with the required size, wherein the rolling ratio is more than or equal to 2.0.
Further, the TC4 alloy thick-wall high-cylinder ring rolling forming method comprises the following steps: the lubricant is a mixture of carbon powder and machine tool lubricating oil which are mixed according to the mass ratio of 1-1.5: 2-2.5, and the preferred ratio is 1: 2.
Further, the TC4 alloy thick-wall high-cylinder ring rolling forming method comprises the following steps: in the drawing process, the distance between the primary blank and the shaft shoulder of the mandrel is 100-150 mm.
Further, the TC4 alloy thick-wall high-cylinder ring rolling forming method comprises the following steps: in the drawing process, the pressing sequence of the upper anvil to each part of the primary blank in the axial direction is as follows: the front part of the primary blank close to the shaft shoulder of the mandrel is pressed, the pressing width is the thickness of the upper anvil, and then the non-pressed sections are pressed from back to front from the rear part of the primary blank.
Further, the TC4 alloy thick-wall high-cylinder ring rolling forming method comprises the following steps: the special tool is composed of an upper anvil and a lower anvil, wherein the upper anvil is a flat anvil, and the lower anvil is a V-shaped anvil.
Compared with the prior art, the invention has the following beneficial effects:
according to the roll forming method of the TC4 alloy thick-wall high-cylinder ring piece, the special tool is adopted to axially elongate the ring blank sleeved on the core roller, so that a reasonable intermediate blank size is obtained, and the defects of insufficient filling of the thick-wall high-cylinder ring piece and the like caused by a small rolling ratio are overcome.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of the principle structure of the elongation step.
Detailed Description
The TC4 alloy thick-wall high-cylinder ring rolling forming method needs to provide equipment such as a forging heating furnace, a press machine, a mechanical arm, a ring rolling machine and the like.
The specific implementation mode is as follows:
placing the TC4 alloy blank obtained by blanking in a heating furnace, wherein the highest furnace temperature in the furnace is less than or equal to 600 ℃, then heating the heating furnace to 20 ℃ below the transformation point, and preserving heat according to 0.6min/mm of the effective thickness; chamfering and rounding the heated TC4 alloy blank by using an oil press, then upsetting the blank by using the oil press, wherein the upsetting ratio is more than or equal to 2.3, returning the upset blank to the furnace, and preserving heat according to 0.4min/mm of the effective thickness, wherein the heat preservation temperature is 20 ℃ below the phase transformation point; punching a through hole on the blank after upsetting by using an oil press to obtain a primary blank 4, returning the primary blank 4 to the furnace for heat preservation according to the effective thickness of 0.4min/mm, wherein the heat preservation temperature is 20 ℃ below the phase transition point.
Use special frock to draw out long a blank 4 of suit on dabber 3 on the hydraulic press, as shown in fig. 1, special frock comprises anvil 1 and lower anvil 2, wherein, and anvil 1 is flat anvil, and lower anvil 2 is V type anvil, and the order of pressing of anvil 1 to each position of 4 axial of a blank is: the method comprises the steps of firstly pressing the front part of a primary blank 4 close to the shaft shoulder of a mandrel 3, wherein the pressing width is the thickness of an upper anvil 1, then gradually pressing the non-pressed sections from back to front from the rear part of the primary blank 4, and in the drawing process, the distance between the primary blank 4 and the shaft shoulder of the mandrel is 100-150 mm.
Preheating the mandrel 3 to 200-250 ℃ before drawing and coating a lubricant, wherein the lubricant is a mixture of carbon powder and machine tool lubricating oil which are mixed according to the mass ratio of 1-1.5: 2-2.5, the preferred ratio is 1:2, during the drawing process, the single-side rolling reduction of the upper anvil 1 is 30-60 mm each time, the drawing ratio is more than or equal to 2.0, a secondary blank is obtained, returning to a furnace for heat preservation, preserving the heat according to 0.4min/mm of the effective thickness, and the heat preservation temperature is 20 ℃ below the phase transition point.
And (3) rolling the secondary blank by using a cylindrical main roller and a cylindrical core roller on a ring rolling machine to finally obtain the thick-wall high-cylindrical ring forging with the required size, wherein the rolling ratio is more than or equal to 2.0.
Claims (5)
1. A roll forming method of a TC4 alloy thick-wall high-tube ring piece is characterized in that a titanium alloy material is a TC4 alloy and comprises the following steps:
1) placing the TC4 alloy blank obtained by blanking in a heating furnace, wherein the highest furnace temperature in the furnace is less than or equal to 600 ℃, then heating the heating furnace to 20 ℃ below the transformation point, and preserving heat according to 0.6min/mm of the effective thickness;
2) chamfering and rounding the heated TC4 alloy blank by using an oil press, then upsetting the blank by using the oil press, wherein the upsetting ratio is more than or equal to 2.3, returning the upset blank to the furnace, and preserving heat according to 0.4min/mm of the effective thickness, wherein the heat preservation temperature is 20 ℃ below the phase transformation point;
3) punching a through hole on the blank after upsetting by using an oil press to obtain a primary blank, then returning the primary blank to the furnace for heat preservation, preserving the heat according to the effective thickness of 0.4min/mm, and preserving the heat at the temperature of 20 ℃ below the phase transition point;
4) drawing out a primary blank sleeved on a mandrel by using a special tool on an oil press, wherein the mandrel needs to be preheated to 200-250 ℃ before drawing out and coated with a lubricant, during the drawing out process, the single-side rolling reduction of an upper anvil is 30-60 mm each time, the drawing-out ratio is more than or equal to 2.0, a secondary blank is obtained, the secondary blank is returned to a furnace for heat preservation, the heat preservation is carried out according to the effective thickness of 0.4min/mm, and the heat preservation temperature is 20 ℃ below the phase transition point;
5) and (3) rolling the secondary blank by using a cylindrical main roller and a cylindrical core roller on a ring rolling machine to finally obtain the thick-wall high-cylindrical ring forging with the required size, wherein the rolling ratio is more than or equal to 2.0.
2. The method for roll forming the TC4 alloy thick-wall high-cylinder ring piece according to claim 1, wherein the method comprises the following steps: the forging forming method of the titanium alloy thick-wall high-cylinder ring piece comprises the following steps: the lubricant is a mixture of carbon powder and machine tool lubricating oil which are mixed according to the mass ratio of 1-1.5: 2-2.5, and the preferred ratio is 1: 2.
3. The method for roll forming the TC4 alloy thick-wall high-cylinder ring piece according to claim 1, wherein the method comprises the following steps: the forging forming method of the titanium alloy thick-wall high-cylinder ring piece comprises the following steps: in the drawing process, the distance between the primary blank and the shaft shoulder of the mandrel is 100-150 mm.
4. The method for roll forming the TC4 alloy thick-wall high-cylinder ring piece according to claim 1, wherein the method comprises the following steps: the forging forming method of the titanium alloy thick-wall high-cylinder ring piece comprises the following steps: in the drawing process, the pressing sequence of the upper anvil to each part of the primary blank in the axial direction is as follows: the front part of the primary blank close to the shaft shoulder of the mandrel is pressed, the pressing width is the thickness of the upper anvil, and then the non-pressed sections are pressed from back to front from the rear part of the primary blank.
5. The method for roll forming the TC4 alloy thick-wall high-cylinder ring piece according to claim 1, wherein the method comprises the following steps: the forging forming method of the titanium alloy thick-wall high-cylinder ring piece comprises the following steps: the special tool is composed of an upper anvil and a lower anvil, wherein the upper anvil is a flat anvil, and the lower anvil is a V-shaped anvil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011053793.5A CN114309373A (en) | 2020-09-29 | 2020-09-29 | TC4 alloy thick-wall high-cylinder ring rolling forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011053793.5A CN114309373A (en) | 2020-09-29 | 2020-09-29 | TC4 alloy thick-wall high-cylinder ring rolling forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114309373A true CN114309373A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011053793.5A Pending CN114309373A (en) | 2020-09-29 | 2020-09-29 | TC4 alloy thick-wall high-cylinder ring rolling forming method |
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| CN (1) | CN114309373A (en) |
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2020
- 2020-09-29 CN CN202011053793.5A patent/CN114309373A/en active Pending
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Application publication date: 20220412 |