CN214361519U - Inductor for induction quenching - Google Patents
Inductor for induction quenching Download PDFInfo
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- CN214361519U CN214361519U CN202022247846.9U CN202022247846U CN214361519U CN 214361519 U CN214361519 U CN 214361519U CN 202022247846 U CN202022247846 U CN 202022247846U CN 214361519 U CN214361519 U CN 214361519U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses an inductor for induction hardening, include: induction coil, busbar, the busbar welding connect in on the induction coil and connecting power, induction coil is hollow induction coil, induction coil includes at least round coil, water supply installation is connected to induction coil's one end, water storage device is connected to induction coil's the other end. The utility model discloses an inductor for induction hardening through letting in cooling water in hollow induction coil, makes the coil cooling, adopts the less air cooling mode of cooling rate to cool down after the work piece heating, avoids the work piece too violent and produce very big tissue stress because of the tissue transformation, leads to the work piece fracture, has increased the reliability of induction hardening simultaneously.
Description
Technical Field
The utility model relates to the field of steel processing, in particular to an inductor for induction hardening.
Background
The induction quenching is to heat a workpiece by utilizing eddy current generated in the workpiece by electromagnetic induction, and is mainly suitable for medium carbon steel and medium carbon alloy steel, and can also be used for high carbon tool steel, alloy tool steel, iron castings and the like. These steel grades have low quenching temperature and poor hardenability, and therefore, a cooling method of spraying water immediately after heating is generally adopted, whereas cold work die steel (for example, DC53 steel) has good hardenability and hardenability, and high surface hardness can be obtained by an air cooling method with a low cooling rate, and a cooling method by spraying water is likely to cause cracking of a workpiece due to extremely large structural stress caused by too strong structural transformation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to avoid the shortcomings in the prior art and provide an inductor for induction hardening, the mode of leading to the cooling water through the coil replaces water spray cooling's mode, avoids processing the work piece fracture.
The purpose of the utility model is realized through the following technical scheme: the utility model discloses an inductor for induction hardening, include: induction coil, busbar, the busbar welding connect in on the induction coil and connecting power, induction coil is hollow induction coil, induction coil includes at least round coil, water supply installation is connected to induction coil's one end, water storage device is connected to induction coil's the other end.
Preferably, induction coil includes into water coil, play water coil and heating coil, the one end of intaking coil is connected water supply installation, the other end of intaking coil connects heating coil's one end, heating coil's the other end is connected go out water coil's one end, it connects to go out water coil's the other end water storage installation.
Preferably, the bus bar comprises a first bus bar and a second bus bar, the first bus bar is welded on the water outlet coil, and the second bus bar is welded on the water inlet coil.
Preferably, the first busbar and the second busbar are both of an "L" shaped configuration.
Preferably, the first bus bar is connected to a positive pole of the power source, and the second bus bar is connected to a negative pole of the power source.
Preferably, the water inlet coil and the water outlet coil are both of an L-shaped structure, and the heating coil is of a circular structure.
Preferably, the total number of coils of the induction coil is one turn.
Preferably, the induction coil and the bus bar are both made of copper.
Preferably, the cross section of the induction coil is rectangular.
Preferably, the length of the rectangle is 15-30mm, and the width of the rectangle is 5-14 mm.
According to the above technical scheme, the utility model discloses following beneficial effect has: the utility model discloses an inductor for induction hardening lets in cooling water in hollow induction coil, makes the coil cooling, adopts the less air cooling mode of cooling rate to cool down after the work piece heating, avoids the work piece too violent and produce very big tissue stress because of the tissue transformation, leads to the work piece fracture, has increased the reliability of induction hardening simultaneously.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.
Fig. 1 is a schematic plan structural view of an inductor for induction hardening according to the present invention.
Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
Wherein the reference numbers are as follows: 1. the water supply device comprises a first bus bar, a second bus bar, a water inlet coil, a heating coil and a water outlet coil, wherein the first bus bar is 2, the second bus bar is 3, the water inlet coil is 4, and the water outlet coil is 5.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1 and 2, an inductor for induction hardening according to the present embodiment includes: the water storage device comprises an induction coil and a bus bar, wherein the bus bar is welded on the induction coil and connected with a power supply, the induction coil is a hollow induction coil and comprises at least one coil, one end of the induction coil is connected with the water supply device, and the other end of the induction coil is connected with the water storage device.
The inner diameter of the circular induction coil is 6-10mm larger than the outer diameter of the heating workpiece, that is, a gap between the inner diameter of the induction coil and the outer diameter of the workpiece is 3-5mm when the workpiece is heated by induction, and in the embodiment, the inner diameter of the circular induction coil is 10mm larger than the outer diameter of the heating workpiece, and a gap between the inner diameter of the induction coil and the outer diameter of the workpiece is 5mm is taken as an example for explanation.
During induction heating, a workpiece is placed in an induction coil made of a copper pipe, a gap of 5mm is formed between the inner diameter of the induction coil and the outer diameter of the workpiece, and the induction coil is connected with an alternating current power supply through a bus bar. The alternating current flowing through the induction coil generates an alternating magnetic field through the workpiece, the alternating frequency of the magnetic field being the same as the frequency of the alternating current. Under the action of the alternating magnetic field, induced current with the same frequency and the opposite direction as the induction coil is generated in the workpiece. A closed loop, commonly referred to as eddy current, is formed along the surface of the workpiece due to the induced current. The eddy current changes the electric energy into heat energy to heat the surface of the workpiece rapidly. The lower the resistivity of the conductor, the stronger the eddy currents and the greater the heat generated. Eddy currents are mainly distributed on the surface of the workpiece, while little current passes inside the workpiece, a phenomenon known as surface effect or skin effect. The induction heating of the embodiment utilizes the skin effect and relies on the current heat effect to rapidly heat the surface of the workpiece to the quenching temperature.
When the surface of the workpiece is heated to austenitizing temperature in the induction coil, the cooling mode of the workpiece adopts a natural cooling mode in the air, compared with the direct water spray cooling, the cooling mode of the embodiment can avoid the cracking of the workpiece caused by the extremely large structural stress generated by the excessively violent structural transformation of the workpiece, thereby increasing the reliability of induction quenching,
the inductor of this embodiment generally does not oxidize or decarburize the workpiece because the heating time is extremely short. Because the induction quenching only heats and cools the surface of the workpiece, and the core part is not heated, so that the thermal stress and the structural stress are only generated on the surface of the workpiece, the deformation of the workpiece is very small, and the workpiece can be prevented from cracking due to the generation of the great structural stress caused by the excessively violent structural transformation by adopting an air cooling mode with a low cooling speed, so that the reliability of the induction quenching is improved.
In this embodiment, the induction coil includes water inlet coil 3, water outlet coil 5 and heating coil 4, and the water supply installation is connected to the one end of water inlet coil 3, and the one end of heating coil 4 is connected to the other end of water inlet coil 3, and the one end of water outlet coil 5 is connected to the other end of heating coil 4, and the water storage device is connected to the other end of water outlet coil 5.
The water inlet coil 3 is connected with a water supply device, cooling water is supplied by the water supply device, and the heating coil 4 is used for heatingCoil 4And the water outlet coil 5 is connected with a water storage device, and cooling water is recycled through the water storage device, so that water resources are saved.
Specifically, in the present embodiment, the bus bar includes a first bus bar 1 and a second bus bar 2, the first bus bar 1 is welded on the water outlet coil 5, the second bus bar 2 is welded on the water inlet coil 3, the first bus bar 1 is connected to the positive pole of the power supply, and the second bus bar 2 is connected to the negative pole of the power supply.
The water outlet coil 5 is welded with the first busbar 1 and connected with the anode of a power supply, the water inlet coil 3 is welded with the second busbar 2 and connected with the cathode of the power supply, and the anode current of the power supply sequentially passes through the first busbar 1, the water outlet coil 5, the heating coil 4, the water inlet coil 3, the second busbar 2 and the cathode of the power supply to form a complete loop.
Specifically, in the present embodiment, the first busbar 1 and the second busbar 2 are both "L" shaped structures, the water inlet coil 3 and the water outlet coil 5 are both "L" shaped structures, and the heating coil 4 is a circular structure.
The first bus bar 1 and the second bus bar 2 are both in L-shaped structures, and can be better welded with the water inlet coil 3 and the water outlet coil 5 in L-shaped structures in a brazing mode, and a machining workpiece is placed in the center of the circular heating coil 4.
The induction coil can adopt coils with different turns to form an inductor according to different machined workpieces, the coils with more turns have larger power, but the corresponding cost is higher, and the embodiment takes the total number of the coils of the induction coil of the inductor as one turn as an example for explanation.
The induction coil and the bus bar can be made of various types of conductors, and the induction coil and the bus bar of the present embodiment are exemplified by copper having a low resistance.
The induction coil can be made of hollow pipes such as a round pipe, an oval pipe and a square pipe, the square pipe is taken as an example for explanation, and the cross section of the square pipe is rectangular.
The length of the cross section of the induction coil made of the square tube is 15-30mm, the width of the rectangle is 5-14mm, and the embodiment takes the length of 20mm and the width of 10mm as an example for explanation.
The working principle of the embodiment is as follows: the inductor for induction quenching of the embodiment is a hollow tube made of a circle of copper coils, and comprises a heating coil 4 for heating a workpiece, a water outlet coil 5 connected with a water storage device, a water inlet coil 3 connected with a water supply device, the heating coil 4 is connected with a first busbar 1 through the water outlet coil 5, the first busbar 1 is connected with the anode of an alternating current power supply, the heating coil 4 is connected with a second busbar 2 through the water inlet coil 3, the first busbar 1 is connected with the cathode of the alternating current power supply, so that the heating coil 4 is connected with an alternating current, after the workpiece is placed in the center of the coil, an alternating magnetic field generated by an alternating circuit of the heating coil 4 can generate eddy current on the surface of the workpiece, so that the surface of the workpiece is heated, when the surface of the workpiece is heated to austenitizing temperature in the induction coil, cooling water is introduced into the hollow induction coil, so that the coil and the surface of the workpiece are cooled, thereby completing the quenching processing of the workpiece.
The inductor for induction quenching of this embodiment lets in cooling water in hollow induction coil, makes the coil cooling, adopts the less air cooling mode of cooling rate to cool down after the work piece heating, avoids the work piece because of the too violent very big tissue stress of production of structure transformation, leads to the work piece fracture, has increased induction quenching's reliability simultaneously.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An inductor for induction hardening, comprising: induction coil, busbar, the busbar welding connect in on the induction coil and connecting power, induction coil is hollow induction coil, induction coil includes at least round coil, water supply installation is connected to induction coil's one end, water storage device is connected to induction coil's the other end.
2. An inductor for induction hardening according to claim 1, characterized in that: the induction coil includes water inlet coil, water outlet coil and heating coil, water inlet coil's one end is connected water supply installation, water inlet coil's the other end connects heating coil's one end, heating coil's the other end is connected water outlet coil's one end, water outlet coil's the other end is connected water storage installation.
3. An inductor for induction hardening according to claim 2, characterized in that: the busbar includes first busbar and second busbar, first busbar weld in go out the waterlogging caused by excessive rainfall coil, the second busbar weld in on the water coil of intaking.
4. An inductor for induction hardening according to claim 3, characterized in that: the first busbar and the second busbar are both of an L-shaped structure.
5. An inductor for induction hardening according to claim 3, characterized in that: the first bus bar is connected with the positive pole of the power supply, and the second bus bar is connected with the negative pole of the power supply.
6. An inductor for induction hardening according to claim 2, characterized in that: the water inlet coil and the water outlet coil are both of L-shaped structures, and the heating coil is of a circular structure.
7. An inductor for induction hardening according to claim 1, characterized in that: the total number of the coils of the induction coil is one circle.
8. An inductor for induction hardening according to claim 1, characterized in that: the induction coil and the bus bar are both made of copper.
9. An inductor for induction hardening according to claim 1, characterized in that: the cross section of the induction coil is rectangular.
10. The inductor of claim 9, wherein: the length of the rectangle is 15-30mm, and the width of the rectangle is 5-14 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022247846.9U CN214361519U (en) | 2020-10-12 | 2020-10-12 | Inductor for induction quenching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022247846.9U CN214361519U (en) | 2020-10-12 | 2020-10-12 | Inductor for induction quenching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214361519U true CN214361519U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202022247846.9U Active CN214361519U (en) | 2020-10-12 | 2020-10-12 | Inductor for induction quenching |
Country Status (1)
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|---|---|
| CN (1) | CN214361519U (en) |
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2020
- 2020-10-12 CN CN202022247846.9U patent/CN214361519U/en active Active
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