CN116037831A - Method for synchronously heating materials during forging of swage block - Google Patents
Method for synchronously heating materials during forging of swage block Download PDFInfo
- Publication number
- CN116037831A CN116037831A CN202310037849.5A CN202310037849A CN116037831A CN 116037831 A CN116037831 A CN 116037831A CN 202310037849 A CN202310037849 A CN 202310037849A CN 116037831 A CN116037831 A CN 116037831A
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- coil
- swage block
- forging
- induction heating
- materials during
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- 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
- B21J13/06—Hammers tups; Anvils; Anvil blocks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a method for synchronously heating materials during forging of a swage block, which specifically comprises the following steps: the induction heating coil is inlaid inside the swage block, alternating current is introduced into the induction heating coil in the material forging process, annular vortex is generated on the surface of the material, and the material is heated by heat generated by the annular vortex. According to the invention, the electromagnetic induction technology is applied to the process of drawing the swage block, so that the aim of synchronously heating the surface of the material in the process of drawing the swage block is fulfilled, and the temperature uniformity of metal bar processing is improved.
Description
Technical Field
The invention belongs to the technical field of metal hot working, and relates to a method for synchronously heating materials during forging of a swage block.
Background
The temperature is an important factor influencing the deformation behavior of the metal material, the metal has better shaping deformation capability at high temperature, and the thermal processing is used as an economic and efficient forming and material structure property regulating and controlling mode to realize wide application in the field of metal processing. The drawing method of the swage block is used as a metal bar forging method, can effectively improve the drawing efficiency and the surface quality of materials, and the cavities of common swage blocks are V-shaped, U-shaped and the like. During the hot working process, the materials are discharged from the heating furnace, transferred to the tool and die to start forging, and then the whole forging process is finished, the temperature between the surface of the materials and the air is continuously reduced due to the temperature difference, and compared with the surface, the core of the bar is slow in heat dissipation and high in temperature, the whole interface presents uneven temperature distribution, and the uniformity of metal deformation is affected to a certain extent. If the method which does not influence the forging process is adopted to supplement heat for the material, the method is greatly beneficial to improving the deformation uniformity of the metal bar.
Disclosure of Invention
The invention aims to provide a method for synchronously heating materials during the forging of a swage block, which applies an electromagnetic induction technology to the process of the drawing of the swage block, so that the aim of synchronously heating the surfaces of the materials during the drawing of the swage block is fulfilled, and the temperature uniformity of the processing of metal bar stock is improved.
The technical scheme adopted by the invention is that the method for synchronously heating the materials during the forging of the swage block comprises the following steps: the induction heating coil is inlaid inside the swage block, alternating current is introduced into the induction heating coil in the material forging process, annular vortex is generated on the surface of the material, and the material is heated by heat generated by the annular vortex.
The invention is also characterized in that:
the pitch of the induction heating coil is 30-100 mm.
The induction heating coil includes a coil-embedded portion and a coil-exposed portion.
The coil insert portion is shaped to conform to the anvil cavity.
The coil exposed portion is in the form of a wavy line.
The surface of the induction heating coil is coated with an insulating coating.
The beneficial effects of the invention are as follows:
1. the induction heating device disclosed by the invention has the advantages that the surface temperature of the material in the forging process is increased by induction heating, and the heating effect is better as the material is closer to the surface.
2. The structure of the anvil is V-shaped or nearly V-shaped, and the embedded annular coil does not damage or change the using effect of the anvil.
3. The coil is inlaid in the die anvil and is of an integrated structure, so that the die anvil is simple, convenient and efficient to use, and no separate induction heating equipment is needed.
4. In the forging process, the temperature drop of the material mainly occurs on the surface due to the heat exchange effect of the material and the air, the temperature drop is larger as the material is closer to the surface, and the heating effect is better as the material is closer to the surface during induction heating.
5. The cross section of the swage block forges the material is round or nearly round, and the induction heating energy uniformly heats the circumferential direction of the surface of the material.
Drawings
FIG. 1 is a front view of an anvil induction heating system employed in the method of the present invention for simultaneously heating material during anvil forging;
FIG. 2 is a side view of an anvil induction heating system employed in a method of achieving synchronized heating of material during anvil forging in accordance with the present invention;
FIG. 3 is a schematic drawing of anvil drawing induction heating in an embodiment of a method of the present invention for simultaneous heating of materials during anvil forging;
FIG. 4 is a cloud chart of cross-sectional temperature distribution when the material is discharged from the furnace and transferred to the anvil in an embodiment of a method for synchronously heating the material during forging of a swage block according to the present invention;
FIG. 5 is a graph showing temperature change of the core (dotted line at point A) and the surface (solid line at point B) after induction heating of the material is started in an embodiment of a method for synchronously heating the material during anvil forging according to the present invention.
In the figure, the shape anvil 1, the coil embedded part 2, the coil exposed part 3, the metal bar 4 and the annular vortex 5.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
According to the method for synchronously heating the materials during forging the swage block, disclosed by the invention, the press used for drawing the swage block has a double-operation structure, the double-operation machine simultaneously controls the movement and rotation of the materials, and the whole drawing of the materials can be realized without turning around; the anvil induction heating system used in the present invention is shown in fig. 1: comprises a swage block 1, a coil embedded part 2, a coil exposed part 3, a metal bar 4 and annular vortex 5.
According to the method for synchronously heating the materials during forging of the swage block, the induction heating coil is embedded into the swage block 1, alternating current is introduced into the induction heating coil during forging of the materials, the induction heating principle is utilized to generate the induction annular vortex 5 on the surfaces of the materials, and the surface temperature of the materials is increased by the heat generated by the annular vortex 5, so that the problem of product quality caused by the fact that the surface temperature of the materials is reduced due to strong heat exchange between air and the materials is avoided.
The invention discloses a method for synchronously heating materials during forging of a swage block, which specifically comprises the following steps:
processing arc induction heating coil winding holes at a certain distance from the surface of the swage block 1, wherein the pitch of the induction heating coil is 30-100mm, and in order to avoid the situation that the materials cannot reach the heating temperature due to insufficient turns, the swage block can be processed with as many reserved holes as possible, but the structural strength of the swage block is not affected;
the induction heating coil consists of two parts, and is inlaid in a part of the swage block 1 and an exposed part of the swage block 1, namely a coil embedded part 2 and a coil exposed part 3, wherein the coil embedded part 2 is arc-shaped and is consistent with a cavity of the swage block 1, and the coil exposed part 3 is in a wave line form, so that the induction heating coil has a certain elastic deformation when the swage block 1 is opened and closed up and down;
the surface of the induction heating coil is coated with an insulating coating with good wear resistance, so that current loss and safety accidents are prevented;
as shown in figure 2, when the material is pulled out, the forming anvils 1 are respectively arranged along the upper and lower directions to deform the material, the double operation machines control the material to move, the induction heating coil is provided with alternating current by the control system, in the process of pulling out the material, a coil power supply is turned on, the alternating current is supplied into the coil, due to the electromagnetic induction principle, annular vortex 5 is induced at the surface of the metal material in the induction heating coil, electric energy generated by the annular vortex 5 is converted into heat energy to heat the surface of the material, the purpose of controlling the surface temperature of the material can be achieved by adjusting the power and frequency in the coil, the surface temperature of the material is tested by the temperature measuring system, the power and frequency of the coil are adjusted when the measured temperature is less than the target temperature, the coil power is adjusted when the measured temperature is greater than the target temperature until the material surface temperature is stabilized at about the target temperature, and the material surface temperature is allowed to fluctuate within a certain range due to the fact that the temperature difference always exists on the surface of the material, and the power is 30KW-100KW and the frequency is 5KHZ-500KHZ when the target temperature is 900-1100 ℃.
The induction heating is a method for improving the temperature of a material by utilizing an electromagnetic induction principle, when alternating current is introduced into a coil, an induction alternating magnetic field is generated inside the coil, the magnetic field enables metal materials inside the coil to generate closed induction eddy currents, and then the purpose of heating the material is achieved by resistance heat generated by the eddy currents.
The method can effectively raise the surface temperature of the material in the forging process, keep the surface temperature within a certain range and realize the purpose of raising the surface temperature of the material in the drawing process of the swage block.
Examples
Taking TC4 titanium alloy anvil drawing induction heating as an example to develop specific simulation explanation, the heat preservation temperature before material forging is 1020℃:
1. and an arc-shaped coil is wound inside the V-shaped anvil, the outer leakage part of the coil is of a wavy line structure, the total number of turns is 10, the coil pitch is 60mm, and the position schematic diagram of the coil is shown in fig. 3.
2. Selecting a TC4 titanium alloy bar as a test material, fully preserving heat in a 1020 ℃ furnace, transferring the test material to a material transferring table through a discharging machine, and clamping the material to an anvil-type groove through an operating machine, wherein the temperature distribution of the cross section of the material is shown in figure 4, and the surface temperature is lower than the core temperature due to the heat exchange effect of the surface of the material and air;
3. turning on a power switch, introducing alternating current into a coil, setting the power to be 50KW, setting the power frequency to be 5KHZ, generating a surface closed annular vortex on the cross section of a TC4 titanium alloy bar in the coil at the moment, converting the vortex into heat energy to heat the surface of the material, wherein the vortex only exists on the surface of the material due to skin effect, and the weaker the vortex is towards the center of the bar, and FIG. 5 shows a temperature change curve of a point B near the surface of the bar and a point A at the center of the bar along with time after induction heating, wherein the point B continuously increases from the initial 964 ℃ to about 1002 ℃ after 430 seconds, is continuously reduced from the initial 1020 ℃ after 430 seconds, and is stable to about 1012 ℃ after 430 seconds;
4. the simulation shows that when the coil pitch is 60mm, the power is 50KW and the power frequency is 5KHZ, the surface of the TC4 alloy bar at 1020 ℃ can be preheated well, the surface temperature after preheating can be increased to 11 ℃ at 1020 ℃, the core part of the bar is not obviously heated, and the extremely poor temperature of the surface and the core part of the bar can be obviously reduced in the drawing process of the swage block.
Claims (6)
1. The method for synchronously heating the materials during the forging of the swage block is characterized by comprising the following steps of: the method specifically comprises the following steps: the induction heating coil is embedded into the inside of the swage block (1), alternating current is introduced into the induction heating coil in the material forging process, annular vortex (5) is generated on the surface of the material, and the material is heated by heat generated by the annular vortex (5).
2. The method for synchronously heating materials during the forging of the swage block according to claim 1, wherein the method comprises the following steps: the pitch of the induction heating coil is 30-100 mm.
3. The method for synchronously heating materials during the forging of the swage block according to claim 1, wherein the method comprises the following steps: the induction heating coil includes a coil embedded portion (2) and a coil exposed portion (3).
4. A method for synchronously heating materials during anvil forging according to claim 3, wherein: the shape of the coil embedded part (2) is consistent with the cavity of the swage block (1).
5. A method for synchronously heating materials during anvil forging according to claim 3, wherein: the coil-exposed portion (3) is in the form of a wavy line.
6. The method for synchronously heating materials during the forging of the swage block according to claim 1, wherein the method comprises the following steps: and the surface of the induction heating coil is coated with an insulating coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310037849.5A CN116037831A (en) | 2023-01-10 | 2023-01-10 | Method for synchronously heating materials during forging of swage block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310037849.5A CN116037831A (en) | 2023-01-10 | 2023-01-10 | Method for synchronously heating materials during forging of swage block |
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| Publication Number | Publication Date |
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| CN116037831A true CN116037831A (en) | 2023-05-02 |
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| CN202310037849.5A Pending CN116037831A (en) | 2023-01-10 | 2023-01-10 | Method for synchronously heating materials during forging of swage block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118002727A (en) * | 2024-04-10 | 2024-05-10 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forging method of short-flow alloy bar |
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2023
- 2023-01-10 CN CN202310037849.5A patent/CN116037831A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118002727A (en) * | 2024-04-10 | 2024-05-10 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Forging method of short-flow alloy bar |
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