CN212512450U

CN212512450U - Crucible device and sintering furnace using same

Info

Publication number: CN212512450U
Application number: CN202021292778.1U
Authority: CN
Inventors: 张斌; 闫雅南
Original assignee: SUZHOU WENTE DIAMOND WHEEL CO Ltd
Current assignee: SUZHOU WENTE DIAMOND WHEEL CO Ltd
Priority date: 2020-07-04
Filing date: 2020-07-04
Publication date: 2021-02-09
Anticipated expiration: 2030-07-04

Abstract

The application relates to a crucible device and a sintering furnace using the crucible device, and relates to the field of sintering, wherein the crucible device comprises a first intermediate frequency induction coil and a graphite crucible positioned on the inner side of the first intermediate frequency induction coil, and a discharge hole is formed in the bottom of the graphite crucible; the discharge gate department is provided with high temperature resistant stopper, the one end of high temperature resistant stopper is located the discharge gate or stretches to the inner chamber of graphite crucible in, the other end is located outside the graphite crucible. Can heat alone through the crucible device and melt the solder, can not cause the influence to the diamond when spending the long time to melt a large amount of solders, improved the problem that long-time high temperature caused the influence to the intensity of diamond.

Description

Crucible device and sintering furnace using same

Technical Field

The application relates to the field of sintering, in particular to a crucible device and a sintering furnace using the same.

Background

The general process flow of the sintered diamond roller comprises the following steps: and putting powder into the graphite die cavity and compacting, wherein the diamond is embedded on the inner wall of the graphite die cavity. And a graphite funnel is arranged at the top of the graphite die cavity and used for conveying the solder into the sintering die cavity, so that the solder and the powder are completely melted, and then the semi-finished diamond roller can be formed by sintering through the medium-frequency induction coil.

Although the medium frequency induction coil heating sintering is a diamond roller processing mode with high efficiency, under the condition that more welding materials are needed, the heating time needed in the processing process is correspondingly prolonged, and the strength of the diamond is affected by the high temperature for a long time.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that long-time high temperature causes the influence to the intensity of diamond, this application provides a crucible device and uses this crucible device's fritting furnace.

In a first aspect, the present application provides a crucible apparatus, which adopts the following technical solution:

a crucible device comprises a first intermediate frequency induction coil and a graphite crucible positioned on the inner side of the first intermediate frequency induction coil, wherein a discharge hole is formed in the bottom of the graphite crucible; the discharge gate department is provided with high temperature resistant stopper, the one end of high temperature resistant stopper is located the discharge gate or stretches to the inner chamber of graphite crucible in, the other end is located outside the graphite crucible.

By adopting the technical scheme, when the welding flux melting device is used, the welding flux is placed in the graphite crucible, and the graphite crucible is heated by the medium-frequency induction coil to melt the welding flux. And after the solder is completely melted, pulling out the high-temperature-resistant plug at the bottom of the graphite crucible, and pouring the melted solder into a graphite mold for sintering. Because the solder is heated and melted separately, the diamond is not affected when a large amount of solder is melted.

Preferably, the discharge hole is positioned in the middle of the bottom surface of the graphite crucible.

By adopting the technical scheme, the solder convenient to melt uniformly flows out from the middle part of the bottom surface of the crucible, and the residual solder in the graphite crucible is effectively reduced.

Preferably, an annular groove is formed in the outer side wall of the part, extending out of the graphite crucible, of the high-temperature-resistant plug along the circumferential direction of the high-temperature-resistant plug.

Through adopting above-mentioned technical scheme, be convenient for extract high temperature resistant stopper from the discharge gate through instruments such as clip, pliers.

Preferably, a chamfer is arranged between the outer side wall of the high-temperature-resistant plug and the end face of the high-temperature-resistant plug, which is close to the inner cavity of the graphite crucible.

Through adopting above-mentioned technical scheme, be convenient for fill in the discharge gate with high temperature resistant stopper.

Preferably, the high-temperature-resistant plug is a cork plug, a asbestos plug or a ceramic fiber plug.

By adopting the technical scheme, the high-temperature-resistant plug has good high-temperature resistance and is not easy to damage, so that the sealing property of the bottom surface of the graphite crucible for heating the solder is ensured.

In a second aspect, the present application provides a sintering furnace using the above crucible apparatus, which adopts the following technical solution:

a sintering furnace comprises a frame body and a sintering chamber located on the frame body, wherein a medium-frequency induction coil II is fixedly arranged in the sintering chamber, the axis of the medium-frequency induction coil II is arranged along the vertical direction, and a graphite mold with an upward mold cavity opening is arranged on the inner side of the medium-frequency induction coil II; the crucible device is arranged above the graphite mold, and a discharge port of a graphite crucible of the crucible device is positioned right above an opening of a mold cavity of the graphite mold.

By adopting the technical scheme, the solder can be melted by heating the pair of graphite crucibles through the medium-frequency induction coil, and meanwhile, the graphite mold is heated by the two pairs of graphite molds through the medium-frequency induction coil on the periphery of the graphite mold, so that the temperature of the graphite mold is raised to the technological requirement. After the solder in the graphite crucible is completely melted, the high-temperature resistant plug at the bottom of the graphite crucible can be pulled out by a tool such as a clamp or a pliers, and the melted solder is poured into the inner cavity of the graphite mold for sintering. Because the solder is separately heated and melted, the diamond is not influenced when a large amount of solder is melted.

Preferably, the first intermediate frequency induction coil of the crucible device is fixedly connected with the inner wall of the sintering chamber, and the distance between the first intermediate frequency induction coil and the second intermediate frequency induction coil along the vertical direction is greater than the height of the graphite crucible along the vertical direction; the frame body is also provided with a driving device which is connected with the graphite crucible and used for driving the graphite crucible to move to the position below the first intermediate-frequency induction coil along the vertical direction; and after the driving device drives the graphite crucible to move to the position below the first intermediate-frequency induction coil, the graphite crucible is positioned above the second intermediate-frequency induction coil.

By adopting the technical scheme, on one hand, after the solder in the graphite crucible is completely melted, the graphite crucible can be lowered for a certain distance by the driving device, so that the melted solder can not splash out of the graphite mold due to higher height. On the other hand, after the graphite crucible is lowered, the graphite mold is separated from the first intermediate-frequency induction coil and is positioned below the first intermediate-frequency induction coil, and solder to be heated and melted is conveniently added into the graphite crucible.

Preferably, the driving device comprises a bracket, a driving chain wheel, a driven chain wheel, a chain, a driving motor and a driving plate; the bracket is arranged along the vertical direction and is fixedly connected with the bracket body; the driving chain wheel is borne at the bottom of the support and can rotate in the circumferential direction, the driven chain wheel is borne at the top of the support and can rotate in the circumferential direction, and the chain is connected between the driving chain wheel and the driven chain wheel; the driving motor is supported on the support and is in transmission connection with the driving chain wheel, the driving plate is fixedly connected with the chain and is used for supporting the graphite crucible, and one surface, far away from the chain, of the driving plate faces the graphite crucible.

Through adopting above-mentioned technical scheme, can drive the drive plate through the transmission of chain and reciprocate to the realization bears graphite crucible and can drive the purpose that graphite crucible reciprocated.

Preferably, a bearing plate is fixedly arranged on one surface, facing the graphite crucible, of the driving plate, the bearing plate is arranged along the horizontal direction, and a fixing ring is arranged on the top surface of the bearing plate; the graphite crucible is placed on the loading plate, the bottom of the graphite crucible is located in the fixing ring, a through hole corresponding to the position of the discharge port is formed in the loading plate, and the high-temperature-resistant plug at the position of the discharge port is located at one end, outside the graphite crucible, of the graphite crucible and extends into the through hole or extends to the lower portion of the loading plate through the through hole.

By adopting the technical scheme, the graphite crucible can be placed in the fixing ring, so that the graphite crucible can be conveniently taken down and placed, and the graphite crucible is convenient to use.

Preferably, the support comprises two guide rails which are arranged along the vertical direction and fixedly connected with the frame body, and two ends of the drive plate along the horizontal direction correspond to the guide rails; two the guide rail is all provided with the spout along vertical direction on two lateral walls that set up in opposite directions, drive plate and two equal sliding connection of spout.

Through adopting above-mentioned technical scheme, slider and spout cooperation of sliding can improve the stability of drive plate when reciprocating to make graphite crucible can not take place to rock when reciprocating, guaranteed the security.

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

1. the crucible device can independently heat and melt the solder, so that the diamond is not influenced when a large amount of solder is melted for a long time, and the problem that the strength of the diamond is influenced by long-time high temperature is solved;

2. the crucible device is assembled on the sintering furnace, the driving mechanism capable of driving the graphite crucible to move up and down is arranged on the sintering furnace, solder can be conveniently added into the graphite crucible, the graphite crucible can be lowered to pour materials, and safety is improved.

Drawings

Fig. 1 is a schematic structural view of a graphite mold according to an embodiment of the present application.

FIG. 2 is a schematic structural view of a crucible apparatus according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a high temperature resistant plug according to an embodiment of the present application.

Fig. 4 is a schematic structural view of a sintering furnace according to an embodiment of the present application.

Fig. 5 is another schematic structural view of the sintering furnace according to the embodiment of the present application.

Fig. 6 is a schematic structural diagram for showing a positional relationship between a frame body of a sintering furnace and a driving device according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a driving device according to an embodiment of the present application.

Description of reference numerals: 1. a first intermediate frequency induction coil; 11. material ring; 12. welding flux; 13. a graphite core; 14. powder material; 15. a substrate; 16. a base plate; 2. a graphite crucible; 21. a discharge port; 3. a high temperature resistant plug; 31. an annular groove; 32. chamfering; 4. a frame body; 41. a sintering chamber; 42. an upper support plate; 43. perforating; 44. an upper notch; 45. a lower support plate; 46. a lower notch; 5. a second intermediate frequency induction coil; 6. a graphite mold; 7. a support; 71. a drive sprocket; 72. a driven sprocket; 73. a chain; 74. a drive motor; 741. a drive gear; 742. a drive chain; 75. a drive plate; 751. a slider; 76. a carrier plate; 77. a stationary ring; 78. a through hole; 79. a guide rail; 791. a chute; 792. an upper rotating shaft; 793. a lower rotating shaft; 794. a connecting gear; 795. a reinforcing rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

Referring to fig. 1, a conventional graphite mold 6 includes a bottom plate 16, an annular base 15 disposed on a top surface of the bottom plate 16, an annular material ring 11 disposed on a top end of the base 15, and a graphite core 13 inserted through the material ring 11 and the base 15 and supported on the bottom plate 16. The general process flow of the sintered diamond roller comprises the following steps: powder 14 is put between the matrix 15 and the graphite core 13 and is compacted, and diamonds are embedded on the inner wall of the matrix 15; solder 12 is put between the material ring 11 and the graphite core 13, and then the solder 12 is melted and conveyed between the matrix 15 and the graphite core 13 by heating through the medium-frequency induction coil sleeved on the periphery of the die, so that the solder 12 and the powder 14 are completely melted, and a semi-finished diamond roller is formed. However, in the case where a large amount of the solder 12 is required, the heating time is prolonged, and the strength of the diamond is affected by a high temperature for a long time.

The embodiment of the application discloses a crucible device. Referring to fig. 2, the crucible apparatus includes a medium frequency induction coil 1 and a graphite crucible 2 located inside the medium frequency induction coil 1. The opening of the graphite crucible 2 is upward, and the middle part of the bottom surface of the graphite crucible 2 is provided with a discharge hole 21. A high-temperature-resistant plug 3 is arranged at the discharge port 21, one end of the high-temperature-resistant plug 3 is positioned in the discharge port 21 or extends into the inner cavity of the graphite crucible 2, and the other end is positioned outside the graphite crucible 2, namely extends out of the lower part of the graphite crucible 2. The high temperature resistant plug 3 plugged into the discharge port 21 is deformed to a certain extent and tightly abuts against the inner wall of the discharge port 21, thereby closing the discharge port 21.

Referring to fig. 2 and 3, an annular groove 31 is formed on the outer side wall of the portion of the refractory plug 3 extending out of the graphite crucible 2 along the circumferential direction of the refractory plug 3, and the plug can be easily pulled out of the discharge hole 21 by a tool such as a clip or a pincer through the annular groove 31. The high temperature resistant plug 3 is one of a cork plug, a asbestos plug or a ceramic fiber plug, and a chamfer 32 is arranged between the outer side wall of the high temperature resistant plug 3 and the end face of the high temperature resistant plug 3 close to the inner cavity of the graphite crucible 2, so that the high temperature resistant plug 3 can be inserted into the discharge hole 21.

When the device is used, the solder 12 is placed in the graphite crucible 2, and the graphite crucible 2 is heated through the medium-frequency induction coil I1 to melt the solder 12. And simultaneously, the matrix 15 is heated through a medium-frequency induction coil II 5 on the periphery of the graphite mold 6, so that the temperature of the matrix 15 is raised to meet the process requirement. And after the solder 12 is completely melted, pulling out the high-temperature-resistant plug 3 at the bottom of the graphite crucible 2, and pouring the melted solder 12 into the material ring 11 for sintering. Since the solder 12 is melted by heating alone, the time for melting a large amount of the solder 12 does not affect the diamond.

The embodiment of the application also discloses a sintering furnace. Referring to fig. 4, the sintering furnace includes a frame body 4 and a sintering chamber 41 located on the frame body 4, specifically, the frame body 4 is a hollow box structure, and an opening is provided on one side surface of the frame body 4, and the opening is an opening of the sintering chamber 41.

Referring to fig. 4, a lower support plate 45 fixedly connected to the frame body 4 is disposed at the bottom of the sintering chamber 41, and a second intermediate frequency induction coil 5 is fixedly disposed on the top surface of the lower support plate 45. The axis of the second intermediate frequency induction coil 5 is arranged along the vertical direction, and a graphite mold 6 with an upward mold cavity opening is arranged on the inner side of the second intermediate frequency induction coil 5. The above-described crucible device is provided above the graphite mold 6, and with reference to fig. 2, the discharge port 21 of the graphite crucible 2 of the crucible device is positioned directly above the mold cavity opening of the graphite mold 6.

Referring to fig. 4, an upper support plate 42 fixedly connected to the frame body 4 is provided at an upper portion of the sintering chamber 41, and a medium frequency induction coil 1 of the crucible apparatus is fixedly connected to a top surface of the upper support plate 42. Referring to fig. 5, a through hole 43 is formed in the upper support plate 42, the position of the through hole 43 corresponds to the position of the graphite crucible 2 and is used for the graphite crucible 2 to pass through, and a driving device connected to the graphite crucible 2 and used for driving the graphite crucible 2 to move to a position below the if induction coil 1 in the vertical direction is further carried on the frame body 4. It should be noted that the distance between the upper support plate 42 and the second intermediate frequency induction coil 5 in the vertical direction is greater than the height of the graphite crucible 2 in the vertical direction, in other words, after the graphite crucible 2 is driven by the driving device to move below the first intermediate frequency induction coil 1, the graphite crucible 2 is located above the second intermediate frequency induction coil 5.

Referring to fig. 6, the driving device is fixedly connected to the inner side wall of the opening of the frame body 4 far away from the sintering chamber 41, an upper gap 44 for the driving device to pass through is formed on the upper supporting plate 42, and a lower gap 46 for the driving device to pass through is formed on the lower supporting plate 45.

Referring to fig. 7, the driving device includes a bracket 7, a driving sprocket 71, a driven sprocket 72, a chain 73, a driving motor 74, and a driving plate 75. The support 7 is arranged along the vertical direction and fixedly connected with the frame body 4, specifically, the support 7 comprises two guide rails 79 which are arranged along the vertical direction and fixedly connected with the frame body 4, and a plurality of reinforcing rods 795 are connected between the two guide rails 79; an upper rotating shaft 792 is arranged between the inner side walls of the tops of the two guide rails 79, a lower rotating shaft 793 is arranged between the inner side walls of the bottoms of the two guide rails 79, and two end parts of the upper rotating shaft 792 and two end parts of the lower rotating shaft 793 are connected with the corresponding guide rails 79 through bearings. The driving sprocket 71 is coaxially and fixedly connected with the lower rotating shaft 793, the driven sprocket 72 is coaxially and fixedly connected with the upper rotating shaft 792, and the chain 73 is connected between the driving sprocket 71 and the driven sprocket 72 and tensioned by the driving sprocket 71 and the driven sprocket 72. The driving motor 74 is fixedly connected with the bracket 7 and is in transmission connection with the driving sprocket 71, specifically, a driving gear 741 is coaxially and fixedly connected with a driving shaft of the driving motor 74, a connecting gear 794 is also coaxially and fixedly connected with the lower rotating shaft 793, and a driving chain 742 is connected between the driving gear 741 and the connecting gear 794.

Referring to fig. 7, the driving plate 75 is fixedly connected to the chain 73, and the two ends of the driving plate 75 in the horizontal direction are provided with the sliding blocks 751, the two guide rails 79 are oppositely arranged on the two side walls and are provided with sliding grooves 791 in the vertical direction, the two sliding blocks 751 are in one-to-one correspondence with the two sliding grooves 791, and the two sliding blocks 751 extend into the corresponding sliding grooves 791 and can slide in the corresponding sliding grooves 791.

Referring to fig. 4 and 7, the driving plate 75 is for carrying the graphite crucible 2, and a face of the driving plate 75 remote from the chain 73 faces the graphite crucible 2. Specifically, one surface of the driving plate 75 facing the graphite crucible 2 is fixedly provided with a bearing plate 76, the bearing plate 76 is arranged along the horizontal direction, the top surface of the bearing plate 76 is fixedly provided with a fixing ring 77, the graphite crucible 2 is placed on the bearing plate 76, and the bottom of the graphite crucible is located in the fixing ring 77. A through hole 78 corresponding to the discharge hole 21 of the graphite crucible 2 is opened on the bearing plate 76 and on the inner side of the fixing ring 77, and one end of the high temperature resistant plug 3 at the discharge hole 21 of the graphite crucible 2, which is positioned outside the graphite crucible 2, extends into the through hole 78 or extends from the through hole 78 to the lower part of the bearing plate 76.

The implementation principle of a sintering furnace in the embodiment of the application is as follows:

in the initial state, the graphite crucible 2 is positioned below the upper support plate 42. After the solder 12 is placed in the graphite crucible 2, the graphite crucible 2 is driven by the driving device to move upwards to the inner side of the medium-frequency induction coil I1, then the graphite crucible 2 is heated by the medium-frequency induction coil I1 to melt the solder 12, and meanwhile, the graphite mold 6 is heated by the medium-frequency induction coil II 5 on the periphery of the graphite mold 6 to enable the graphite mold 6 to be heated to meet the technological requirements. After the solder 12 in the graphite crucible 2 is completely melted, the graphite crucible 2 is lowered to the lower part of the lower support plate 45 by a driving device, then the high temperature resistant plug 3 at the bottom of the graphite crucible 2 is pulled out by a tool such as a clamp or a pliers, and the melted solder 12 is poured into the inner cavity of the graphite mold 6 for sintering. Since the solder 12 is melted by heating alone, the diamond is not affected when melting a large amount of the solder 12.

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

1. A crucible apparatus, characterized in that: the device comprises a first intermediate frequency induction coil (1) and a graphite crucible (2) positioned on the inner side of the first intermediate frequency induction coil (1), wherein a discharge hole (21) is formed in the bottom of the graphite crucible (2); and a high-temperature-resistant plug (3) is arranged at the discharge port (21), one end of the high-temperature-resistant plug (3) is positioned in the discharge port (21) or extends into the inner cavity of the graphite crucible (2), and the other end of the high-temperature-resistant plug is positioned outside the graphite crucible (2).

2. The crucible apparatus of claim 1, wherein: the discharge hole (21) is positioned in the middle of the bottom surface of the graphite crucible (2).

3. The crucible apparatus of claim 1, wherein: and an annular groove (31) is formed in the outer side wall of the part, extending out of the graphite crucible (2), of the high-temperature-resistant plug (3) along the circumferential direction of the high-temperature-resistant plug (3).

4. The crucible apparatus of claim 1, wherein: and a chamfer (32) is arranged between the outer side wall of the high-temperature-resistant plug (3) and the end face of the high-temperature-resistant plug (3) close to the inner cavity of the graphite crucible (2).

5. The crucible apparatus of claim 1, wherein: the high-temperature resistant plug (3) is a cork plug, a asbestos plug or a ceramic fiber plug.

6. A sintering furnace comprises a frame body (4) and a sintering chamber (41) located on the frame body (4), wherein a medium-frequency induction coil II (5) is fixedly arranged in the sintering chamber (41), the axis of the medium-frequency induction coil II (5) is arranged along the vertical direction, and a graphite mold (6) with an upward mold cavity opening is arranged on the inner side of the medium-frequency induction coil II (5); the method is characterized in that: a crucible device as claimed in any one of claims 1 to 5 is arranged above the graphite mold (6), and the discharge opening (21) of the graphite crucible (2) of the crucible device is positioned right above the mold cavity opening of the graphite mold (6).

7. Sintering furnace according to claim 6, characterized in that: the middle-frequency induction coil I (1) of the crucible device is fixedly connected with the inner wall of the sintering chamber (41), and the distance between the middle-frequency induction coil I (1) and the middle-frequency induction coil II (5) along the vertical direction is greater than the height of the graphite crucible (2) along the vertical direction; the frame body (4) is also provided with a driving device which is connected with the graphite crucible (2) and is used for driving the graphite crucible (2) to move to the position below the medium-frequency induction coil I (1) along the vertical direction; and after the graphite crucible (2) is driven by the driving device to move to the lower part of the medium-frequency induction coil I (1), the graphite crucible (2) is positioned above the medium-frequency induction coil II (5).

8. Sintering furnace according to claim 7, characterized in that: the driving device comprises a bracket (7), a driving chain wheel (71), a driven chain wheel (72), a chain (73), a driving motor (74) and a driving plate (75); the bracket (7) is arranged along the vertical direction and is fixedly connected with the bracket body (4); the driving chain wheel (71) is borne at the bottom of the support (7) and can rotate in the circumferential direction, the driven chain wheel (72) is borne at the top of the support (7) and can rotate in the circumferential direction, and the chain (73) is connected between the driving chain wheel (71) and the driven chain wheel (72); the driving motor (74) is borne on the support (7) and is in transmission connection with the driving chain wheel (71), the driving plate (75) is fixedly connected with the chain (73) and is used for bearing the graphite crucible (2), and one surface, far away from the chain (73), of the driving plate (75) faces towards the graphite crucible (2).

9. Sintering furnace according to claim 8, characterized in that: a bearing plate (76) is fixedly arranged on one surface, facing the graphite crucible (2), of the driving plate (75), the bearing plate (76) is arranged along the horizontal direction, and a fixing ring (77) is arranged on the top surface of the bearing plate (76); graphite crucible (2) are placed on loading board (76) and the bottom is located retainer plate (77), be provided with through-hole (78) that correspond with the position of discharge gate (21) on loading board (76), the one end that high temperature resistant stopper (3) of discharge gate (21) department is located graphite crucible (2) is stretched in through-hole (78) or is stretched the below of loading board (76) by through-hole (78).

10. Sintering furnace according to claim 8, characterized in that: the support (7) comprises two guide rails (79) which are arranged along the vertical direction and fixedly connected with the frame body (4), and two ends of the driving plate (75) along the horizontal direction correspond to the guide rails (79); two guide rail (79) are all provided with spout (791) along vertical direction on being two lateral walls that set up in opposite directions, drive plate (75) and two equal sliding connection of spout (791).