CN111424138A - Induction heat treatment mechanism - Google Patents

Abstract

The invention discloses an induction heat treatment mechanism, which comprises an induction coil. The induction coil comprises a first distance rod, a first induction heating ring with an open-loop structure and a second distance rod which are sequentially connected. The first distance rod is suitable for being connected with the first electrode, and the second distance rod is suitable for being connected with the second electrode, so that the first induction heating ring generates a magnetic field. The induction coil is internally provided with a first cooling flow channel which starts to pass through the first induction heating ring from the first distance rod and extends to the second distance rod. The first distance rod is provided with a water inlet communicated with the first distance rod, and the second distance rod is provided with a water outlet communicated with the second distance rod. The induction coil is electrically conducted and supported through the first distance rod and the second distance rod, so that the first induction heating ring can heat the workpiece. The first cooling flow channel inside the induction coil circulates cooling water, so that the induction coil can be prevented from being burnt.

Description

Induction heat treatment mechanism

Technical Field

The invention relates to the technical field of heat treatment devices, in particular to an induction heat treatment mechanism.

Background

The basic principle of induction heating is to use the law of electromagnetic induction and the principle of joule heating effect. When an alternating current is passed through the coil, an alternating magnetic field is generated, and if a charged conductor is placed in the coil, eddy currents are induced. When the resistance of the electrical conductor is small, the generated eddy current is large, and when the eddy current passes through, joule heat is generated, so that the ambient temperature is increased. The induction heat treatment apparatus can heat a workpiece made of an electrically conductive material to a very high temperature in a short time.

However, in the prior art, different workpieces are produced in different fields, and the heat treatment process required for different workpieces is also different. When a shaft part needs to be quenched on the surface, the shaft part (i.e. a workpiece) is generally heated by induction heating equipment, and the workpiece is cooled by quenching cooling liquid.

Obviously, the induction heat treatment mechanism is accompanied by high temperature during the working process, and the induction heat treatment mechanism is easy to damage. In addition, the current induction heat treatment mechanism has a complex structure and high manufacturing cost.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an induction heating mechanism which can prevent the induction heating mechanism from being burnt at high temperature; moreover, the structure is simpler and the cost is low.

The purpose of the invention is realized by adopting the following technical scheme:

an induction heat treatment mechanism comprising an induction coil; the induction coil comprises a first distance rod, a first induction heating ring with an open-loop structure and a second distance rod which are sequentially connected; the first distance rod is suitable for being connected with a first electrode, and the second distance rod is suitable for being connected with a second electrode, so that the first induction heating ring generates a magnetic field; the induction coil is internally provided with a first cooling flow channel which starts from the first distance rod, passes through the first induction heating ring and extends to the second distance rod; the first distance rod is provided with a water inlet communicated with the first distance rod, and the second distance rod is provided with a water outlet communicated with the second distance rod.

Furthermore, the water inlet is connected with a first pipe joint, and the water outlet is connected with a second pipe joint.

Further, the first distance bar and the second distance bar are parallel to each other; an isolation gap is formed between the first distance rod and the second distance rod, an insulating piece is contained in the isolation gap, and the insulating piece is used for preventing the first distance rod from being short-circuited with the second distance rod.

Further, the induction heat treatment mechanism further comprises an insulating binding band, and the insulating binding band binds the first distance rod, the insulating piece and the second distance rod together.

Further, a first insulation gap is formed between the first end of the first induction heating ring and the second end of the first induction heating ring, the first distance rod is connected with the first end of the first induction heating ring, the second distance rod is connected with the second end of the first induction heating ring, and the first insulation gap corresponds to the isolation gap.

Further, the width of the first insulation gap is smaller than the width of the isolation gap.

Further, the width of the first insulation gap ranges from 0.3mm to 5 mm.

Further, a first insulation gap is formed between the first end of the first induction heating ring and the second end of the first induction heating ring; the induction heat treatment mechanism further comprises a second induction heating ring of an open-loop structure, and the second induction heating ring is embedded in the inner ring of the first induction heating ring so that the first induction heating ring is in conductive connection with the second induction heating ring; a second insulation gap is formed between two ends of the second induction heating ring, and the first insulation gap corresponds to the second insulation gap; the water inlet through hole is formed in the end face of the second induction heating ring, a second cooling flow channel is formed in the second induction heating ring, the second induction heating ring is arranged on the inner ring curved surface of the second induction heating ring along the radial direction of the second induction heating ring, and the water inlet through hole, the second cooling flow channel and the water outlet through hole are sequentially communicated.

Furthermore, a plurality of water outlet through holes are uniformly distributed on the inner ring curved surface of the second induction heating ring; and the water inlet through holes are provided with a plurality of water inlet through holes which are circumferentially arrayed by taking the axis of the second induction heating ring as the center.

Further, the water inlet through hole is connected with a third pipe joint.

Compared with the prior art, the invention has the beneficial effects that:

1. the induction coil is electrically conducted and supported through the first distance rod and the second distance rod, so that the first induction heating ring can heat the workpiece. 2.

2. And the first distance rod and the second distance rod enable the first induction heating ring to be far away from other parts, so that the workpiece is heated in a safe environment.

3. The first cooling flow channel inside the induction coil circulates cooling water, so that the induction coil can be prevented from being burnt.

Drawings

FIG. 1 is a schematic structural view of an induction heat treatment mechanism of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural diagram of the induction coil of FIG. 1;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a cross-sectional view of FIG. 3;

FIG. 6 is a schematic structural view of a second induction heating ring of FIG. 1;

FIG. 7 is a cross-sectional view of FIG. 6;

fig. 8 is a front view of fig. 6.

In the figure: 1. an induction coil; 11. a first distance bar; 12. a first induction heating ring; 13. a second distance bar; 14. a first cooling flow passage; 15. isolating the gap; 16. an insulating member; 17. a first insulating gap; 2. a first pipe joint; 3. a second pipe joint; 4. a binding band; 5. a second induction heating ring; 51. a second insulating gap; 52. a water inlet through hole; 53. a second cooling flow channel; 54. a water outlet through hole; 6. and a third pipe joint.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Fig. 1-2 show an induction heat treatment mechanism according to a preferred embodiment of the present invention, comprising an induction coil 1. The induction coil 1 comprises a first distance rod 11, a first induction heating ring 12 with an open-loop structure and a second distance rod 13 which are sequentially connected. The first distance bar 11 is adapted to be connected to a first electrode and the second distance bar 13 is adapted to be connected to a second electrode such that the first induction heating ring 12 generates a magnetic field. The induction coil 1 has a first cooling flow channel 14 (see fig. 5) inside, and the first cooling flow channel 14 passes through the first induction heating ring 12 from the first distance bar 11 and extends to the second distance bar 13. The first distance rod 11 is provided with a water inlet communicated with the first distance rod 11, and the second distance rod 13 is provided with a water outlet communicated with the second distance rod 13.

The first induction heating ring 12 of the open loop structure, that is, the first induction heating ring 12 is an annular structure and leaves an opening to prevent the first distance rod 11 and the second distance rod 13 from being directly short-circuited. The first induction heating ring 12 having the open-loop structure can form an induction magnetic field after being energized, thereby heating the workpiece in the inner ring curved surface of the first induction heating ring 12. Wherein, the inner ring curved surface of the first induction heating ring 12 is the curved surface of the central hole of the first induction heating ring 12.

The first distance bar 11 is used not only to separate the distance between the first induction heating ring 12 and other devices, thereby making the working area a spacious space; and also as a conductive wire, thereby simplifying the structure of the induction heat treatment mechanism. Similarly, the first distance bar 11 is not only used to separate the distance between the first induction heating ring 12 and other devices, thereby providing a spacious space for the working area; and also as a conductive wire, thereby simplifying the structure of the induction heat treatment mechanism. The first electrode and the second electrode may be connected to each other by a conductive member, and the voltage between the first electrode and the second electrode may be set freely.

The first cooling flow channel 14 inside the induction coil 1 mainly supplies cooling liquid to circularly flow back, so that the induction coil 1 is cooled, and the self-burning of the induction coil 1 due to self-heating is avoided.

Obviously, the first induction heating ring 12 can heat the workpiece by conducting and supporting the induction coil 1 through the first distance rod 11 and the second distance rod 13. And, the first and second distance bars 11 and 13 keep the first induction heating ring 12 away from other parts, thereby allowing the workpiece to be heated in a safe environment. By circulating the cooling water through the first cooling flow channel 14 inside the induction coil 1, the self-burning of the induction coil 1 can be prevented. In this case, as a general cooling method, the workpiece may be quenched and cooled by directly pouring a coolant above the induction coil 1.

As a further preferable embodiment of this embodiment, referring to fig. 1, the water inlet is connected with a first pipe joint 2, and the water outlet is connected with a second pipe joint 3; thereby being convenient for the carrying, the installation and the use of the induction heating mechanism.

As a further preferred embodiment of this embodiment, referring to fig. 1, the first distance bar 11 and the second distance bar 13 are parallel to each other to reduce the space occupied by the entire induction heating mechanism. As a basic condition, a separation gap 15 is formed between the first distance bar 11 and the second distance bar 13 (see fig. 4). In order to avoid a voltage breakdown of the air in the event of high voltages, an insulating element 16 (see fig. 1) is accommodated in the separating gap 15, which insulating element 16 serves to prevent the first distance bar 11 from shorting the second distance bar 13. The insulating member 16 is preferably plate-shaped so as to correspond to the separation gap 15, and thus is not easily detached depending only on the frictional force therebetween.

As a further preferred embodiment of this embodiment, referring to fig. 1, the induction heat treatment mechanism further comprises an insulating binding band 4, wherein the insulating binding band 4 binds the first distance rod 11, the insulating member 16, and the second distance rod 13 together; thereby preventing the insulating member 16 from falling off. Wherein, the binding belt 4 is preferably a binding belt, the binding effect is good, and the binding and disassembling process is also convenient.

As a further preferred embodiment of the present embodiment, a first insulation gap 17 (see fig. 4) is formed between the first end of the first induction heating ring 12 and the second end of the first induction heating ring 12. It can be understood that when the first end of the first induction heating ring 12 is close to the second end thereof to form the first insulation gap 17, the whole circumference of the workpiece in the first induction heating ring 12 can be heated, and the situation that the residual part is not quenched sufficiently can be avoided. That is, the smaller the first insulation gap 17 is, the more complete the quenching heating is; and the first end of the first induction heating ring 12 is not allowed to be attached to the second end thereof, so that the first induction heating ring 12 is prevented from no current passing through. Preferably, the first distance bar 11 is connected to a first end of the first induction heating ring 12, the second distance bar 13 is connected to a second end of the first induction heating ring 12, and the first insulation gap 17 corresponds to the isolation gap 15 (see fig. 4). In this way, the manufacture of the induction coil 1 can be facilitated.

Wherein, under the safe condition, the width of the first insulation gap 17 may be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm, 1.2mm, 4.3.3 mm, 4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 4.0mm, 4.4mm, 4.5mm, 4mm, 4.5mm, 4.6mm, 4mm, 4.7mm, 4.8mm, 4 mm. As a further preferable embodiment of this embodiment, the width of the first insulating gap 17 ranges from 0.3mm to 5 mm. The range can enable the first insulation gap 17 to have a good insulation effect, and the phenomenon that the local quenching effect of the workpiece is too poor due to the fact that the first insulation gap 17 is too wide is avoided. That is, it should be allowed that the width value of the first insulation gap 17 may be 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc.

As a further preferred embodiment of this embodiment: the width of the first insulation gap 17 is smaller than the width of the isolation gap 15 (see fig. 3 and 4). The purpose of the isolation gap 15 is to avoid direct short circuit between the first distance bar 11 and the second distance bar 13, and therefore the distance between the two should be a certain distance, and the first insulation gap 17 is needed to avoid the situation that the residual position is not sufficiently quenched when the workpiece is heated while the two ends of the first induction heating ring 12 are spaced. In addition, since the width of the first insulation gap 17 is smaller than the width of the isolation gap 15, the insulation 16 can be blocked from being burned by an open flame near the first induction heating ring 12.

As a further preferred embodiment of this embodiment:

referring to fig. 1, the induction heat treatment mechanism further includes a second induction heating ring 5 of an open-loop structure (where the second induction heating ring 5 of the open-loop structure is of an annular structure and leaves an opening), and the second induction heating ring 5 is embedded in the inner ring of the first induction heating ring 12, so that the first induction heating ring 12 is conductively connected to the second induction heating ring 5. Wherein the second induction heating ring 5 may be welded, glued or otherwise fixedly connected to the first induction heating ring 12.

Referring to fig. 6, the second induction heating ring 5 has a second insulation gap 51 between both ends thereof, and the first insulation gap 17 corresponds to the second insulation gap 51 (see fig. 1, 4 and 6); to minimize the space occupied by the induction heat treatment means.

Referring to fig. 7 and 8, the second induction heating ring 5 is provided with a water inlet through hole 52 (the end surface of the second induction heating ring 5 is a plane connected with the curved surface), a second cooling flow channel 53 is provided inside the second induction heating ring 5, the second induction heating ring 5 is provided with a plurality of water outlet through holes 54 on the inner curved surface of the second induction heating ring 5 along the radial direction of the second induction heating ring 5, and the water inlet through hole 52, the second cooling flow channel 53, and the water outlet through holes 54 are sequentially connected. Through pouring into the coolant liquid into second cooling runner 53, can cool off the work piece, this response heat treatment mechanism has acted as the main part of heating the work piece promptly, has acted as the main part of cooling the work piece again for the design is extremely ingenious, practical, and low in cost, is suitable for the popularization. In addition, since the outlet holes 54 are closely attached to the workpiece and are accurately cooled, the amount of coolant used can be greatly saved.

In addition, by manufacturing the second induction heating ring 5 separately from the induction coil 1, the process difficulty can be reduced. Moreover, when one of the elements is damaged, the damaged element can be replaced conveniently, and the other undamaged element is reserved, so that the cost is saved.

Referring to fig. 7, as a further preferred embodiment of the present embodiment, a plurality of water outlet through holes 54 are uniformly distributed on the inner ring curved surface of the second induction heating ring 5; wherein, the inner ring curved surface of the second induction heating ring 5 is the curved surface of the central hole of the second induction heating ring 5. And the plurality of water inlet through holes 52 are arranged, and the plurality of water inlet through holes 52 are circumferentially arrayed around the axis of the second induction heating ring 5. Therefore, the quenching treatment process of the workpiece can be uniformly treated in all directions, and the quenching quality of the workpiece is improved.

As a further preferable embodiment of this embodiment, a third pipe joint 6 is connected to the water inlet hole 52.

It should be added here that the induction coil 1 and the second induction heating ring 5 are in accordance with their designation, i.e. both are electrically conductive.

The working process of the induction heat treatment mechanism is as follows:

the first cooling channel 14 can permanently circulate the cooling liquid, so as to avoid the burning of the induction coil 1 due to overheating at the moment of starting the induction coil 1 or due to the delay of a cooling system. When a shaft workpiece is heated, the induction coil 1 is electrified through the first electrode and the second electrode, so that the first induction heating ring 12 and the second induction heating ring 5 have current, then the workpiece is placed into the inner ring curved surface of the second induction heating ring 5 (the inner ring curved surface of the first induction heating ring 12 at this time), and the shaft workpiece is heated in the alternating magnetic field; meanwhile, the cooling liquid passing through the second cooling flow channel 53 and the water outlet hole 54 in the second induction heating ring 5 is sprayed out to cool the workpiece, and the quenching treatment of the curved surface of the shaft workpiece (particularly suitable for a gear shaft) is completed.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. Induction heat treatment mechanism, its characterized in that: comprises an induction coil; the induction coil comprises a first distance rod, a first induction heating ring with an open-loop structure and a second distance rod which are sequentially connected; the first distance rod is suitable for being connected with a first electrode, and the second distance rod is suitable for being connected with a second electrode, so that the first induction heating ring generates a magnetic field; the induction coil is internally provided with a first cooling flow channel which starts from the first distance rod, passes through the first induction heating ring and extends to the second distance rod; the first distance rod is provided with a water inlet communicated with the first distance rod, and the second distance rod is provided with a water outlet communicated with the second distance rod.

2. The induction heat treatment mechanism of claim 1, wherein: the water inlet is connected with a first pipe joint, and the water outlet is connected with a second pipe joint.

3. The induction heat treatment mechanism of claim 1, wherein: the first distance bar and the second distance bar are parallel to each other; an isolation gap is formed between the first distance rod and the second distance rod, an insulating piece is contained in the isolation gap, and the insulating piece is used for preventing the first distance rod from being short-circuited with the second distance rod.

4. The induction heat treatment mechanism of claim 3, wherein: the induction heat treatment mechanism further comprises an insulating binding band, and the insulating binding band binds the first distance rod, the insulating piece and the second distance rod together.

5. The induction heat treatment mechanism of claim 3, wherein: first end of first induction heating ring with form first insulation gap between the second end of first induction heating ring, first distance pole with the first end of first induction heating ring is connected, the second distance pole with the second end of first induction heating ring is connected, first insulation gap with keep apart the gap and correspond.

6. The induction heat treatment mechanism of claim 5, wherein: the width of the first insulation gap is smaller than the width of the isolation gap.

7. The induction heat treatment mechanism of claim 5, wherein: the width range of the first insulation gap is 0.3mm-5 mm.

8. The induction heat treatment mechanism of claim 1, wherein: a first insulation gap is formed between the first end of the first induction heating ring and the second end of the first induction heating ring; the induction heat treatment mechanism further comprises a second induction heating ring of an open-loop structure, and the second induction heating ring is embedded in the inner ring of the first induction heating ring so that the first induction heating ring is in conductive connection with the second induction heating ring; a second insulation gap is formed between two ends of the second induction heating ring, and the first insulation gap corresponds to the second insulation gap; the water inlet through hole is formed in the end face of the second induction heating ring, a second cooling flow channel is formed in the second induction heating ring, the second induction heating ring is arranged on the inner ring curved surface of the second induction heating ring along the radial direction of the second induction heating ring, and the water inlet through hole, the second cooling flow channel and the water outlet through hole are sequentially communicated.

9. The induction heat treatment mechanism of claim 8, wherein: a plurality of water outlet through holes are uniformly distributed on the inner ring curved surface of the second induction heating ring; and the water inlet through holes are provided with a plurality of water inlet through holes which are circumferentially arrayed by taking the axis of the second induction heating ring as the center.

10. The induction heat treatment mechanism of claim 8, wherein: the water inlet through hole is connected with a third pipe joint.

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