CN115319220A - Induction vacuum heating equipment applied to irregular workpiece - Google Patents

Abstract

The utility model belongs to the technical field of vacuum heating and specifically relates to an induction vacuum heating equipment who is applied to irregular work piece is related to, places the platform, place the bench and install the seat of placing that is used for placing the work piece, place the bench and placed quartz bell jar, quartz bell jar cover is established place on the seat, place the bench and install the heating coil that is used for carrying out the heating to the work piece, heating coil is located inside the quartz bell jar, heating coil can buckle into and treat the unanimous crooked radian of welded work piece welding seam. The heating coil has the advantages that the temperature difference of the heating coil emitted to each position of the welding line of the irregular workpiece can be reduced, and the welding quality of the workpiece is guaranteed.

Description

Induction vacuum heating equipment applied to irregular workpiece

Technical Field

The application relates to the field of vacuum heating, in particular to induction vacuum heating equipment applied to irregular workpieces.

Background

At present, when some workpieces are subjected to heat treatment, the workpieces need to be heated in a vacuum state, for example, when the workpieces are subjected to brazing treatment, the used equipment is to improve a vacuum environment for the workpieces through a vacuum brazing furnace, and then heat and weld the workpieces through a heating coil, so that the purpose of brazing the workpieces in the vacuum environment is achieved.

Referring to fig. 1, a vacuum brazing furnace used at present mainly includes a placing table 1, a placing base (not shown in the figure) for supporting a workpiece is installed on the placing table 1, a quartz bell jar 3 is placed on the placing table 1, the quartz bell jar 3 is sleeved on the placing base so that the workpiece is in a sealed environment, an air extractor (not shown in the figure) for vacuumizing the inside of the quartz bell jar 3 is arranged on the placing table 1, a heating coil 4 for heating the workpiece and a lifting device 42 for driving the heating coil 4 to lift are vertically and slidably connected to the placing table 1, and the heating coil 4 can be driven by the lifting device 42 to be sleeved on the quartz bell jar 3 so as to heat and weld the workpiece in the quartz bell jar 3.

For a regular workpiece, the temperature emitted by the heating coil to each position of the weld joint of the workpiece is uniform, but for an irregular workpiece, because the workpiece is irregular, the distances from the weld joint to the heating coil are different at different positions on the workpiece, so that the temperature emitted by the heating coil to each position of the weld joint of the workpiece is large, and the welding quality of the workpiece is affected.

Disclosure of Invention

In order to reduce the temperature difference of heating coil transmission to each position department of irregular work piece welding seam, guarantee the welding quality of work piece, this application provides an induction vacuum heating equipment who is applied to irregular work piece.

The application provides a be applied to induction vacuum heating equipment of irregular work piece adopts following technical scheme:

the utility model provides a be applied to induction vacuum heating equipment of irregular work piece, places the platform, place the bench and install the seat of placing that is used for placing the work piece, place the bench and placed quartzy bell jar, quartzy bell jar cover is established place on the seat, place the bench and install the heating coil that is used for heating the work piece, heating coil is located inside the quartzy bell jar, heating coil can be buckled into and treat the unanimous crooked radian of welded work piece welding seam.

By adopting the technical scheme, the heating coil is placed inside the quartz bell jar, the bending radian of the heating coil is set to be consistent with the welding shape of the irregular workpiece to be welded, when the irregular workpiece is subjected to heating treatment, only the heating coil needs to be placed corresponding to the position of the irregular workpiece to be machined, the distance between the heating coil and the welding seam on the irregular workpiece can be equal, the temperature emitted to each position of the welding seam by the heating coil is uniform, the temperature difference emitted to each position of the welding seam of the irregular workpiece by the heating coil is reduced, and the welding quality of the workpiece is ensured.

Optionally, the heating coil is annular.

By adopting the technical scheme, the heating coil can be sleeved on the irregular workpiece to heat two sides of the irregular workpiece at the same time, so that the temperature emitted to two sides of the welding line of the irregular workpiece by the heating coil is uniform.

Optionally, a support rod for supporting and fixing the heating coil is detachably connected to the placing seat, and an insulating material is arranged between the support rod and the heating coil.

By adopting the technical scheme, the heating coil can be supported, the relative position between the heating coil and the workpiece is fixed, and meanwhile, the situation that the heating coil is short-circuited because electric power on the heating coil reaches the supporting rod can be avoided due to the arrangement of the insulating material.

Optionally, the insulating material includes that the rigid coupling is in first insulation board on the bracing piece and can dismantle the connection and be in first insulation board keeps away from the second insulation board of bracing piece one side, first insulation board with the confession has been seted up between the second insulation board the spacing hole that heating coil passed.

Through adopting above-mentioned technical scheme, can fix heating coil in spacing hole through first insulation board and second insulation board to the realization will heat spacing fixing on the bracing piece, can support heating coil through the bracing piece, thereby fix the relative position between heating coil and the work piece.

Optionally, the support rod is connected with the placing seat through a bolt.

Through adopting above-mentioned technical scheme, can be according to the bracing piece of highly changing suitable height of welding seam on the work piece of treating welding to make the height of heating coil and the height of welding seam on the work piece of treating welding unanimous.

Optionally, a mounting hole for the heating coil to pass through is formed in the placing table, a mounting plate is fixedly connected to the heating coil, and the mounting plate is fixedly connected to the placing table and used for plugging the mounting hole.

Through adopting above-mentioned technical scheme, the setting of mounting hole can realize placing heating coil inside the quartz bell jar, and the setting of mounting panel can carry out the shutoff to the mounting hole, avoids external gas to enter into to the quartz bell jar from the mounting hole inside and influence the vacuum environment that the work piece was located.

Optionally, a limiting groove for embedding the mounting plate is formed in one side, away from the placing seat, of the placing table.

Through adopting above-mentioned technical scheme, realize spacing to mounting panel mounted position.

Optionally, a sealing ring is arranged between the mounting plate and the placing table.

Through adopting above-mentioned technical scheme, can increase the mounting panel and place the sealed between the platform.

Optionally, the number of the heating coils is two, and the two heating coils are arranged at intervals.

Through adopting above-mentioned technical scheme, during the use, can install two irregular work pieces simultaneously on placing the seat, heat the welding seam of two irregular work pieces respectively through two heating coils and weld, realize welding two irregular work pieces simultaneously, welding efficiency is higher.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the heating coil, the heating coil is arranged in the quartz bell jar, the bending radian of the heating coil is consistent with the shape of a workpiece to be processed, so that when the heating coil is installed, the heating coil and the workpiece to be processed can be correspondingly placed, the distance between the heating coil and the workpiece to be processed is consistent, the temperature of the heating coil emitted to each position of a welding seam of the workpiece is uniform, the temperature difference of the heating coil emitted to each position of the welding seam of the irregular workpiece is reduced, and the welding quality of the workpiece is guaranteed;

2. the arrangement of the mounting hole and the mounting plate enables the heating coil to be mounted inside the quartz bell jar through the mounting hole, the mounting plate can seal the mounting hole, and the influence of external air reaching the inside of the quartz bell jar on the vacuum environment of the workpiece is reduced;

3. the setting of bracing piece and insulating material for can fix the position of heating coil for the work piece through support piece, with the relative position of fixing heating coil and work piece, the setting of insulating material makes when fixing heating coil position through the bracing piece, still can not make the phenomenon of heating coil short circuit appear.

Drawings

Fig. 1 is a schematic diagram for showing a background structure.

Fig. 2 is a schematic view of the overall structure of the present application.

Fig. 3 is a front view structure diagram of the present application.

Fig. 4 is a schematic view of another view of the heating coil relative to the workpiece.

Fig. 5 is a schematic view showing a mounting structure of the mounting plate and the mounting table.

Fig. 6 is an enlarged schematic view at a in fig. 5.

Description of reference numerals: 1. a placing table; 11. mounting holes; 12. a limiting groove; 13. a seal ring; 14. a first insertion hole; 2. a placing seat; 3. a quartz bell jar; 4. a heating coil; 41. mounting a plate; 42. a lifting device; 5. an air extraction device; 6. a support bar; 7. an insulating material; 71. a first insulating plate; 72. a second insulating plate; 73. a limiting hole; 731. a first half-bore; 732. a second half-bore.

Detailed Description

The present application is described in further detail below with reference to figures 2-6.

At present, when regular workpieces are heated and welded through a vacuum brazing furnace, the required requirements are as follows:

the vacuum degree reaches 1 x 10-6torr and above;

the process temperature is as follows: 900-1100 ℃;

maximum temperature of equipment: 1200 ℃;

temperature uniformity: 14 ℃ C.

At present, when regular workpieces are welded through a vacuum brazing furnace, the welded workpieces can meet the requirement that the temperature uniformity is +/-14 ℃, wherein the regular workpieces refer to the workpieces of which welding points are positioned on the same horizontal plane and are all distributed on an imaginary plane, and the imaginary plane is a perfect circle. For example, when two cylinders are brazed together, the weld seam between the two cylinders is a perfect circle, and the existing circular heating coil 4 is directly sleeved on the weld seam of the two cylinders, so that the temperature of the heating coil 4 emitted to each position of the weld seam is uniform.

However, when welding an irregular workpiece, the irregular workpiece refers to a workpiece whose welding points are not located on the same horizontal plane and/or located on the same horizontal plane and have different distances from a target surface, and the target surface is formed by rotating a certain welding point of the workpiece around an axis, wherein the axis refers to a midpoint of a connecting line of two opposite welding points. Such as the welding spots of irregular workpieces, and is of a structure with wave-shaped inside and outside or wave-shaped up and down around the circumferential direction. For example, when a part with an irregular shape is brazed on another part with an irregular shape, a welding seam between the two parts is bent, distances from all positions of the welding seam to the inner wall of a quartz bell jar are different, and the welding seams at different positions may also be different in height position, at the moment, when the heating coil 4 is sleeved at the welding seam of the irregular part, the distances from the heating coil 4 to all positions of the welding seam of the irregular workpiece are different, so that the temperature difference emitted by the heating coil 4 to the irregular workpiece is large, and the temperature uniformity is between 35 and 40 ℃ when the irregular workpiece is welded at present.

At present, the welding seam temperature uniformity of irregular workpieces can meet the requirement of a common use scene within 35-40 ℃, but for military products, the requirement on the strength of parts is higher, and therefore the requirement on the temperature uniformity is higher. Therefore, how to improve the temperature uniformity when heating irregular workpieces in a brazing mode is a problem to be solved at present.

The embodiment of the application discloses an induction vacuum heating equipment applied to irregular workpieces. Referring to fig. 2 and 3, the induction vacuum heating apparatus applied to irregular workpieces includes a placing table 1, a placing base 2 mounted on the placing table 1 for placing the workpieces, and a quartz bell jar 3 placed on the placing table 1 with one end open, the quartz bell jar 3 having an open end abutting against the placing table 1, and the placing base 2 being located inside the quartz bell jar 3. A heating coil 4 for heating and welding the workpiece is arranged on the placing table 1, the heating coil 4 is positioned in the quartz bell jar 3, and the heating coil 4 can be bent to a radian consistent with the shape of a welding seam on the irregular workpiece. When the heating coil is used, the heating coil 4 is directly placed in the quartz bell jar 3, and the heating coil 4 is fixed on the placing table 1 to fix the relative position between the heating coil 4 and the irregular workpiece, so that the heating coil 4 is parallel to the welding of the irregular workpiece, the position between the heating coil 4 and the welding seam of the irregular workpiece is consistent, and the temperature of the heating coil 4 emitted to each position of the welding seam of the workpiece is uniform.

Wherein, in order to guarantee that the work piece welds under vacuum environment, be provided with and be used for carrying out the air exhaust device 5 of evacuation to the vacuum chamber at the one side that places platform 1 and deviate from placing seat 2, when 3 open ends butt of quartz bell jar are on placing platform 1, air exhaust device 5 communicates to the inside of quartz bell jar 3 for form the vacuum chamber that is used for placing the work piece between quartz bell jar 3 and the placing platform 1. Wherein, the air extracting device 5 is the same as the air extracting device 5 of the existing vacuum brazing furnace, and the repeated description is omitted.

Referring to fig. 4 and 5, a mounting hole 11 through which the heating coil 4 passes is formed in the placing table 1, the heating coil 4 extends into the quartz bell jar 3 through the mounting hole 11, a mounting plate 41 is fixedly connected to the heating coil 4, and the mounting plate 41 and the placing table 1 can be fixedly connected through bolts so that the mounting plate 41 blocks the mounting hole 11, thereby ensuring the vacuum degree in the quartz bell jar 3 and reducing the external air from reaching the vacuum chamber from the mounting hole 11.

Wherein, the mounting plate 41 is located on one side of the placing table 1 departing from the placing seat 2, and the side of the placing table 1 departing from the placing seat 2 is provided with a limit groove 12 for embedding the mounting plate 41. The installation position of the installation plate 41 can be limited by the arrangement of the limiting groove 12. When the mounting plate 41 is mounted, the mounting plate 41 is directly fitted into the stopper groove 12, and the mounting plate 41 and the placement table 1 are fixed by bolts, thereby fixing the position of the mounting plate 41 on the placement table 1.

Meanwhile, in order to ensure sealing between the mounting plate 41 and the placing table 1, a seal ring 13 is provided between the mounting plate 41 and the placing table 1. Specifically, the sealing ring 13 is sleeved on the outer ring of the mounting hole 11, a first inserting hole 14 for inserting the sealing ring 13 is formed in the placing table 1, and the position of the sealing ring 13 can be fixed by inserting the sealing ring 13 into the first inserting hole 14. When the mounting plate 41 is fixed to the placement base 1, the mounting plate 41 comes into contact with the position where the seal ring 13 is exposed from the first insertion hole 14 toward the placement base 1, and the closer the pressing force between the mounting plate 41 and the placement base 1 is, the better the sealing effect between the mounting plate 41 and the placement base 1 is.

Referring to fig. 3 and 6, the heating coil 4 is ring-shaped, the diameter of the heating coil is 2-6mm, the wall thickness is 0.5-1.5mm, and compared with the existing heating coil 4 which has the diameter of 12-15mm and the wall thickness of 2mm, the heating coil 4 of the present application is convenient to bend. When the heating coil is used, the heating coil 4 can be sleeved on the irregular workpiece and the heating coil 4 is operated to bend, so that the linear distance between each position of the heating coil 4 and two sides of the irregular welding seam is equal, and the linear distance can be 2-5mm.

Of course, the diameter and the wall thickness of the heating coil 4 may be selected from other dimensions as long as the bending of the workpiece can be facilitated.

When the linear distance between the heating coil 4 and two sides of the irregular welding seam is 2-5mm, and the workpiece is heated to 1000 ℃,5 points are selected by an infrared thermometer along the length direction of the heating coil 4 at intervals for detection, the temperature uniformity of the 5 points is within +/-14 ℃, and the required requirements are met.

Specifically, the linear distance from each part of the heating coil 4 to both sides of the irregular coil may be selected to be 3mm. When the linear distance between the heating coil 4 and two sides of the irregular welding seam is 3mm, and the workpiece is heated to 1000 ℃,5 points are selected by an infrared thermometer along the length direction of the heating coil 4 at intervals for detection, the temperature uniformity of the 5 points is within +/-11 ℃, the temperature uniformity is better, and the quality of the welded workpiece is higher.

Referring to fig. 3 and 4, in order to fix the relative position between the heating coil 4 and the irregular workpiece, a support rod 6 for supporting the heating coil 4 is detachably connected to the placing base 2, and the support rod 6 can be directly inserted into the placing base 2; the support rod 6 may also be bolted to the placement base 2, and the present application is described by way of example in which the support rod 6 is bolted to the placement base 2. The heating coil 4 is detachably connected to the supporting rod 6, and the position of the heating coil 4 on the placing seat 2 can be fixed through the supporting rod 6 so as to fix the relative position between the heating coil 4 and the irregular workpiece and ensure the distance between the heating coil 4 and the welding seam of the irregular workpiece.

In order to avoid a short circuit due to leakage when the heating coil 4 is attached to the support rod 6, an insulating material 7 is provided between the heating coil 4 and the support rod 6.

Referring to fig. 4, the insulating material 7 includes a first insulating plate 71 fixedly connected to the support rod 6 and a second insulating plate 72 detachably connected to one side of the first insulating plate 71 far from the support rod 6 by bolts, a limiting hole 73 for the heating coil 4 to pass through is formed between the first insulating plate 71 and the second insulating plate 72, the heating coil 4 is inserted into the limiting hole 73, and the second insulating plate 72 and the first insulating plate 71 are both fixed to the support rod 6 by bolts, so that the fixing of the heating coil 4 can be realized, and the insulation protection between the heating coil 4 and the support rod 6 is also realized.

Specifically, a semicircular first half hole 731 is formed in a side of the first insulating plate 71 facing the second insulating plate 72, a semicircular second half hole 732 is formed in a side of the second insulating plate 72 facing the first insulating plate 71, and when the first insulating plate 71 and the second insulating plate 72 are coupled together, the first half hole 731 and the second half hole 732 are butted to form the circular stopper hole 73, thereby facilitating the mounting and fixing of the heating coil 4.

Referring to fig. 4, the heating coils 4 may be provided in two, the two heating coils 4 are spaced apart, and the two heating coils 4 may be parallel to each other, so that when in use, a welding process may be simultaneously performed on two workpieces, and the welding efficiency is higher.

The implementation principle of the induction vacuum heating equipment applied to the irregular workpiece in the embodiment of the application is as follows: during the use, can install two work pieces that wait to weld simultaneously on placing seat 2 (the work piece is current with the connected mode of placing seat 2, as long as can realize fixing the work piece on placing seat 2 can, do not describe here in detail). Then the mounting plate 41 is fixed on the placing table 1 through bolts, so that the heating coil 4 is positioned on one side of the placing table 1 facing the placing seat 2, then the heating coil 4 is sleeved on the workpiece to be welded and the heating coil 4 is operated to be bent to a bending radian consistent with the welding seam of the workpiece to be welded, and the position of the heating coil 4 on the support rod 6 is fixed through the insulating material 7, so that the distances from the heating coil 4 to the welding seam of the workpiece to be welded are equal, and the temperature of the heating coil 4 emitted to each position of the welding seam of the workpiece is uniform. Then the quartz bell jar 3 is sleeved on the placing base 2, the opening end of the quartz bell jar 3 is abutted to the placing table 1, and finally the vacuum cavity is vacuumized through the air extractor 5. The heating coil 4 with the diameter of 2-6mm and the wall thickness of 0.5-1.5mm is selected, so that the heating coil 4 can be bent, and the distances from all parts of the heating coil 4 to a workpiece are equal. Meanwhile, the heating coil 4 is placed inside the quartz bell jar 3, so that the power reduction caused by the diameter reduction of the heating coil 4 compared with the diameter reduction of the existing heating coil 4 is avoided, the heating coil 4 is closer to a welding seam of a workpiece to be welded, and the power consumption is lower. The temperature difference of the heating coil 4 emitted to each position of the irregular workpiece welding line is reduced, and the welding quality of the workpiece is guaranteed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides an induction vacuum heating equipment for irregular work piece which characterized in that: place platform (1), place and install on platform (1) and be used for placing seat (2) of placing of work piece, place and place quartzy bell jar (3) on platform (1), quartzy bell jar (3) cover is established place on seat (2), place and install heating coil (4) that are used for heating the work piece on platform (1), heating coil (4) are located inside quartzy bell jar (3), heating coil (4) can be buckled into and wait the unanimous crooked radian of welded work piece welding seam.

2. The induction vacuum heating apparatus for irregular workpieces as set forth in claim 1, wherein: the heating coil (4) is annular.

3. The induction vacuum heating apparatus for irregular workpieces as set forth in claim 1, wherein: the heating coil is characterized in that a supporting rod (6) used for supporting the heating coil (4) is detachably connected to the placing seat (2), and an insulating material (7) is arranged between the supporting rod (6) and the heating coil (4).

4. The induction vacuum heating apparatus for irregular workpieces as set forth in claim 3, wherein: insulating material (7) are in including the rigid coupling first insulating board (71) on bracing piece (6) and can dismantle the connection and be in first insulating board (71) are kept away from second insulating board (72) of bracing piece (6) one side, first insulating board (71) with the confession has been seted up between second insulating board (72) spacing hole (73) that heating coil (4) passed.

5. The induction vacuum heating apparatus for irregular workpieces as set forth in claim 3, wherein: the supporting rod (6) is connected with the placing seat (2) through a bolt.

6. The induction vacuum heating apparatus for irregular workpieces as set forth in claim 1, wherein: the heating coil is characterized in that a mounting hole (11) for the heating coil (4) to pass through is formed in the placing table (1), a mounting plate (41) is fixedly connected to the heating coil (4), and the mounting plate (41) is fixedly connected with the placing table (1) and used for plugging the mounting hole (11).

7. The induction vacuum heating apparatus for irregular workpieces as set forth in claim 6, wherein: one side of the placing table (1) departing from the placing seat (2) is provided with a limit groove (12) for embedding the mounting plate (41).

8. The induction vacuum heating apparatus for irregular workpieces as claimed in claim 6, wherein: and a sealing ring (13) is arranged between the mounting plate (41) and the placing table (1).

9. The induction vacuum heating apparatus for irregular workpieces according to any one of claims 1 to 8, wherein: the heating coils (4) are arranged in two numbers, and the two heating coils (4) are arranged at intervals.

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