CN110657672A - Rectangular heating body structure of tungsten-molybdenum sintering furnace - Google Patents
Rectangular heating body structure of tungsten-molybdenum sintering furnace Download PDFInfo
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- CN110657672A CN110657672A CN201910994845.XA CN201910994845A CN110657672A CN 110657672 A CN110657672 A CN 110657672A CN 201910994845 A CN201910994845 A CN 201910994845A CN 110657672 A CN110657672 A CN 110657672A
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- heating element
- tungsten
- molybdenum
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- strips
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 103
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000005245 sintering Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 abstract description 16
- 238000005452 bending Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000006698 induction Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 240000004282 Grewia occidentalis Species 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 150000003657 tungsten Chemical class 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
- F27B14/061—Induction furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
Abstract
The invention provides a rectangular heating element structure of a tungsten-molybdenum sintering furnace, which comprises a plurality of heating element strips with different sizes and heating element male and female finger buckles, wherein two adjacent heating element strips are connected through the heating element male and female finger buckles, and the length of each heating element strip is at most 1500 mm; many not unidimensional heat-generating body strips connect into rectangle, and rectangular four angles adopt the right angle overlap joint, and a plurality of rectangular layers fold into the heat-generating body. According to the invention, after the round heating element structure is changed into the square heating element structure, the sintered tungsten-molybdenum product can be flatly placed on the discharging bottom support, so that the bending deformation of the sintered material is improved to the maximum extent, the straightening and leveling process of the tungsten-molybdenum product is greatly reduced, and the product quality is improved.
Description
Technical Field
The invention belongs to the field of tungsten and molybdenum processing equipment, and particularly relates to a rectangular heating body structure of a tungsten and molybdenum sintering furnace.
Background
The medium frequency induction sintering furnace is an important device widely used in the special metal processing industry of tungsten, molybdenum and the like. Induction heating is one of the good forms of electric heating, and it utilizes the faraday's electromagnetic induction principle to convert electric energy into heat energy, so that a three-phase power supply is changed into intermediate frequency alternating current by an intermediate frequency induction power supply, and when the alternating current passes through a square induction coil, an alternating induction magnetic field is generated, that is, an alternating magnetic flux phi whose size and direction are changed with time is generated. When a piece of conductive metal (namely tungsten and molybdenum workpieces) is placed in the induction coil, corresponding induced electromotive force can be generated inside the metal according to a Faraday's law of electromagnetic induction, the induced current can be generated due to the existence of the induced electromotive force even if the metal is a conductor, the induced current is called eddy current, and according to the Joule-Lenz law, the eddy current can generate certain heat when flowing inside the metal with certain resistance, so that the metal is heated.
The hearth of a medium-frequency induction sintering furnace adopted by the high-temperature sintering of the existing tungsten-molybdenum product is of a vertical circular structure, and the sintering furnace has the main problems that the tungsten-molybdenum product is greatly deformed in the sintering process and needs to be heated and calibrated after being discharged, so that the production cost is increased, and the quality of the product is influenced by heating and pressure processing in the calibrating process; meanwhile, due to the structural problem of the vertical heating furnace, the space utilization rate is low, the energy consumption is relatively large in the using process, and the efficiency is low.
Disclosure of Invention
In order to overcome the defects that the existing tungsten-molybdenum product generates larger deformation in the sintering process, heating and shape correction are needed after the tungsten-molybdenum product is discharged from a furnace, so that the production cost is increased, and the quality of the product is influenced by heating and pressure processing in the shape correction process; meanwhile, the vertical heating furnace has the problems of low space utilization rate, relatively high energy consumption in the using process and low efficiency due to the structural problem, and the invention provides the rectangular heating element structure of the tungsten-molybdenum sintering furnace.
The technical scheme adopted by the invention is as follows:
a rectangular heating element structure of a tungsten-molybdenum sintering furnace comprises a plurality of heating element strips with different sizes and heating element male and female finger buckles, wherein two adjacent heating element strips are connected through the heating element male and female finger buckles, and the length of each heating element strip is at most 1500 mm; many not unidimensional heat-generating body strips connect into rectangle, and rectangular four angles adopt the right angle overlap joint, and a plurality of rectangular layers fold into the heat-generating body.
The heating element male-female finger buckle comprises a concave spigot and a convex spigot, the concave spigot and the convex spigot are respectively arranged on two adjacent connected heating element strips, the concave spigot and the convex spigot are connected in an occlusion manner, and an expansion gap of 0.5-1mm is reserved at the occlusion position.
The length of the heating element strip 2 can be as follows: 100mm, 500mm, 800mm, 1000mm, 1200mm, 1400mm and 1500 mm. The heating element strip 2 with different sizes can be selected according to the requirement to form different rectangles, and a plurality of rectangular layers are stacked to form the heating element 1.
Expansion gaps are reserved at the four corner ends of the rectangle formed by connecting the plurality of heating element strips.
The expansion gap is 15-30 mm. The existence of the expansion gap ensures that the whole structure cannot be tilted or broken during working.
The width of the heating element strip is 30 ~ 40mm, and the thickness is 20 mm.
The invention has the beneficial effects that:
the finger buttons between each heating body strip adopt the male and female finger buttons, so that the phenomenon that the strips run out due to stronger magnetic field in the heating process is prevented. The four corners of the rectangle are lapped in a right angle mode, and expansion gaps are reserved at the end heads of the four corners. The deformation generated in the heating process is small, and if the deformation exists, the deformation can be straightened by a heating straightening method.
According to the invention, after the round heating element structure is changed into the square heating element structure, the sintered tungsten-molybdenum product can be flatly placed on the discharging bottom support, so that the bending deformation of the sintered material is improved to the maximum extent, the straightening and leveling process of the tungsten-molybdenum product is greatly reduced, and the product quality is improved.
The square heating body provided by the invention can increase the utilization rate of the hearth, and has the advantages of low energy consumption and high productivity.
The following will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a heat-generating body, wherein (a) is a heat-generating body, and (b) and (c) are rectangles composed of heat-generating body strips of different sizes.
FIG. 2 shows the structure of a heating element strip, (d) shows a heating element strip having a male seam allowance, and (e) shows a heating element strip having a female seam allowance.
FIG. 3 shows a heat generating body in a form of overlapping four corners.
Figure 4 is a round corner structure at four corners of the heating body.
FIG. 5 is a schematic view of the male and female finger-clasps of the heating element.
In the figures, the reference numbers are: 1. a heating element; 2. a heating element strip; 3. the heating element is a male-female finger button.
Detailed Description
Example 1:
in order to overcome the defects that the existing tungsten-molybdenum product generates larger deformation in the sintering process, heating and shape correction are needed after the tungsten-molybdenum product is discharged from a furnace, so that the production cost is increased, and the quality of the product is influenced by heating and pressure processing in the shape correction process; meanwhile, the vertical heating furnace has the problems of low space utilization rate, relatively high energy consumption in the using process and low efficiency due to the structural problem, the invention provides the rectangular heating body structure of the tungsten-molybdenum sintering furnace shown in the figures 1-5, and after the round heating body structure is changed into the square heating body structure, the sintered tungsten-molybdenum product can be flatly placed on the discharging bottom support, so that the bending deformation of the sintered material is improved to the maximum extent, the straightening and leveling process of the tungsten-molybdenum product is greatly reduced, and the product quality is improved.
A rectangular heating element structure of a tungsten-molybdenum sintering furnace comprises a plurality of heating element strips 2 with different sizes and heating element male and female finger buckles 3, wherein two adjacent heating element strips 2 are connected through the heating element male and female finger buckles 3, and the length of each heating element strip 2 is at most 1500 mm; the heating element strips 2 with different sizes are connected into a rectangle, four corners of the rectangle are in right-angle lap joint, and the heating elements 1 are formed by stacking a plurality of rectangular layers.
The invention complies with the principle of up-down staggered joint when assembling. The finger-buckling mode between each heating body strip 2 adopts the male and female finger-buckles, so that the phenomenon that the strips run out due to a stronger magnetic field in the heating process is prevented. The four corners of the rectangle are lapped in a right angle mode, and expansion gaps are reserved at the end heads of the four corners. The deformation generated in the heating process is small, and if the deformation exists, the deformation can be straightened by a heating straightening method.
According to the invention, after the structure of the round heating element is changed into the structure of the square heating element, the sintered tungsten-molybdenum product can be flatly placed on the discharging bottom support, so that the bending deformation of the sintered material is improved to the maximum extent, the straightening and leveling process of the tungsten-molybdenum product is greatly reduced, and the product quality is improved.
Example 2:
based on embodiment 1, in this embodiment, the heating element male and female finger tabs 3 include a female spigot and a male spigot, the female spigot and the male spigot are respectively disposed on two adjacent connected heating element strips 2, the female spigot and the male spigot are engaged and connected, and an expansion gap of 0.5-1mm is reserved at the engagement position.
The length of the heating element strip 2 can be as follows: 100mm, 500mm, 800mm, 1000mm, 1200mm, 1400mm and 1500 mm.
The four corner ends of the rectangle formed by connecting the plurality of heating element strips 2 are reserved with expansion gaps.
The expansion gap is 15-30 mm.
The width of the heating element strip 2 is 30 ~ 40mm, and the thickness is 20 mm.
The present invention relates to a rectangular heating element structure of a tungsten-molybdenum sintering furnace as shown in fig. 1, which is designed to determine the length of each heating element in consideration of stability because it is not as stable as a circular structure, and is controlled to be within 1500mm in length, is not easy to manufacture if it is too long, and is uncontrollably deformed during heating. The principle of up-down staggered joint is observed during assembly. The four-corner lapping mode adopts a right-angle lapping mode, and expansion gaps are reserved at the end heads of the four corners, the expansion gaps are 15-30mm, and the expansion gaps are selected to be 20 mm. Deformation generated in the heating process is small, if deformation exists, the deformation can be straightened by a heating straightening method, if the four corners are in a fillet form, the straight-line section part is seriously deformed due to heating in the heating process, and straightening cannot be performed. The heating body is seriously deformed and replaced because the space of the hearth is reduced to a certain degree.
The finger-buckling mode between each heating element strip 2 adopts the male and female finger-buckles, so that the phenomenon that the strips run out due to stronger magnetic field in the heating process is prevented, the width of the heating element strips 2 is controlled to be 30 ~ 40mm, and the thickness is controlled to be about 20mm, so that the stability of the heating element in the installation process can be ensured, and the deformation of the heating element in the heating process can also be ensured.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention. The devices and their structural components not described in detail in this embodiment are well known in the art and commonly used in the industry, and will not be described herein.
Claims (6)
1. The utility model provides a tungsten molybdenum fritting furnace rectangle heat-generating body structure which characterized in that: the heating element comprises a plurality of heating element strips (2) with different sizes and heating element male and female finger buckles (3), two adjacent heating element strips (2) are connected through the heating element male and female finger buckles (3), and the length of each heating element strip (2) is at most 1500 mm; a plurality of heating element strips (2) with different sizes are connected into a rectangle, four corners of the rectangle are in right-angle lap joint, and a plurality of rectangular layers are laminated to form a heating element (1).
2. The rectangular heating element structure of the tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the heating element male and female finger buckles (3) comprise concave seam allowances and convex seam allowances, the concave seam allowances and the convex seam allowances are respectively arranged on two adjacent connected heating element strips (2), the concave seam allowances and the convex seam allowances are connected, and expansion gaps of 0.5-1mm are reserved at the occlusion positions.
3. The rectangular heating element structure of the tungsten-molybdenum sintering furnace according to claim 1, characterized in that: the length of the heating element strip (2) can be as follows: 100mm, 500mm, 800mm, 1000mm, 1200mm, 1400mm and 1500 mm.
4. The rectangular heating element structure of the tungsten-molybdenum sintering furnace according to claim 1, characterized in that: expansion gaps are reserved at the four corner ends of the rectangle formed by connecting the plurality of heating element strips (2).
5. The rectangular heating element structure of the tungsten-molybdenum sintering furnace according to claim 4, characterized in that: the expansion gap is 15-30 mm.
6. A heating element of a tungsten-molybdenum sintering furnace as claimed in claim 1, characterized in that the width of the heating element strip (2) is 30 ~ 40mm, and the thickness is 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910994845.XA CN110657672A (en) | 2019-10-18 | 2019-10-18 | Rectangular heating body structure of tungsten-molybdenum sintering furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910994845.XA CN110657672A (en) | 2019-10-18 | 2019-10-18 | Rectangular heating body structure of tungsten-molybdenum sintering furnace |
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| CN110657672A true CN110657672A (en) | 2020-01-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2262696Y (en) * | 1996-02-29 | 1997-09-17 | 本溪钨钼厂 | Heating body for intermediate frequency furnace |
| CN201522192U (en) * | 2009-07-22 | 2010-07-07 | 湖北菲利华石英玻璃股份有限公司 | Intermediate-frequency conduction furnace used for thermal retrofitted quartz glass |
| CN103849928A (en) * | 2014-03-19 | 2014-06-11 | 江苏苏博瑞光电设备科技有限公司 | Multiple-piece guided mode method growth technology for sapphire wafer |
| CN104534878A (en) * | 2014-12-19 | 2015-04-22 | 株洲硬质合金集团有限公司 | Tungsten/molybdenum crucible for high-temperature heating furnace and manufacturing method of tungsten/molybdenum crucible |
| CN210980779U (en) * | 2019-10-18 | 2020-07-10 | 西安成航炉业有限公司 | Rectangular heating body structure of tungsten-molybdenum sintering furnace |
-
2019
- 2019-10-18 CN CN201910994845.XA patent/CN110657672A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2262696Y (en) * | 1996-02-29 | 1997-09-17 | 本溪钨钼厂 | Heating body for intermediate frequency furnace |
| CN201522192U (en) * | 2009-07-22 | 2010-07-07 | 湖北菲利华石英玻璃股份有限公司 | Intermediate-frequency conduction furnace used for thermal retrofitted quartz glass |
| CN103849928A (en) * | 2014-03-19 | 2014-06-11 | 江苏苏博瑞光电设备科技有限公司 | Multiple-piece guided mode method growth technology for sapphire wafer |
| CN104534878A (en) * | 2014-12-19 | 2015-04-22 | 株洲硬质合金集团有限公司 | Tungsten/molybdenum crucible for high-temperature heating furnace and manufacturing method of tungsten/molybdenum crucible |
| CN210980779U (en) * | 2019-10-18 | 2020-07-10 | 西安成航炉业有限公司 | Rectangular heating body structure of tungsten-molybdenum sintering furnace |
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