Slotting tooling

Abstract

The present invention relates to a slotting tool for slotting the inner surface of a crucible, wherein the crucible is surrounded by a accommodating cavity with an open end. The slotting tool includes a guide portion, which is constructed to be shaped by a first guide segment, a second guide segment, and a third guide segment connected in sequence so as to be variable in shape so as to fit the inner surface of the crucible. The first guide segment, the second guide segment, and the third guide segment together form a guide groove that exposes the inner surface of the crucible. The guide groove extends from one side edge of the open end of the crucible through the inner bottom wall of the crucible to the other side edge of the open end, and the guide groove is used to guide a slotting machine to process an exhaust groove on the inner surface of the crucible exposed by the guide groove. The slotting tool adapts to crucibles of different shapes by changing the shape of the guide portion to fit the inner surface of the crucible, and forms a guide groove in the crucible that exposes its inner surface through the guide portion. The slotting machine can be guided by the guide portion to accurately process the exhaust groove on the surface exposed in the guide groove.

Description

Technical Field

[0001] The invention relates to the technical field of crucible processing for single crystal furnaces, in particular to a slotting tool. Background Art

[0002] The crucible is one of the most important components in the thermal field of a single crystal furnace. It is used to support the quartz crucible (which softens at high temperatures) and the silicon material loaded into the quartz crucible.

[0003] Currently, crucibles on the market utilize a one-piece molding process, which avoids the formation of joints and effectively prevents the safety risks associated with silicon leakage. However, seamless one-piece crucibles lack unobstructed gas escape paths, preventing the smooth escape of gases generated between the crucible and the quartz crucible, particularly on the spherical and R-shaped surfaces away from the straight-walled port. This can lead to bulging and fracture of the quartz crucible, hindering the normal operation of the production process. To prevent this, grooves are typically created in the one-piece crucible using specialized tooling.

[0004] However, due to the differences in the specific structures and shapes of crucibles, traditional slotting tools are usually only suitable for one type or category of crucibles. If you want to slot different types of crucibles, you have to redesign and make the tooling, which is very troublesome. Summary of the Invention

[0005] Based on this, it is necessary to provide a universal slotting tool to address the above problems.

[0006] A slotting tool is used for slotting the inner surface of a crucible, wherein the crucible is surrounded to form a receiving cavity with an open end, and the slotting tool comprises:

[0007] a guide portion comprising a first guide segment, a second guide segment, and a third guide segment connected in sequence, wherein the first guide segment and the third guide segment are arranged opposite to each other, and the guide portion is configured such that the shape formed by the first guide segment, the second guide segment, and the third guide segment is changeable so as to conform to the inner surface of the crucible;

[0008] Wherein, the first guide section, the second guide section and the third guide section jointly form a guide groove exposing the inner surface of the crucible; the guide groove extends from one side edge of the open end of the crucible through the inner bottom wall of the crucible to the other side edge of the open end, and the guide groove is used to guide the grooving machine to process the exhaust groove on the inner surface of the crucible exposed by the guide groove.

[0009] In one embodiment, the second guide section is configured to at least follow the deformation of the inner bottom surface of the crucible to fit the inner bottom surface of the crucible;

[0010] And / or, the second guide segment is configured to have an adjustable length in its longitudinal direction, and the first guide segment and the third guide segment are respectively connected to two ends of the second guide segment in the longitudinal direction.

[0011] In one embodiment, the second guide section includes a plurality of monomers connected in sequence along the longitudinal direction of the second guide section, and adjacent monomers are rotatably connected to each other.

[0012] In one embodiment, the monomer includes a body and a rotating shaft, the bodies of adjacent monomers are rotatably connected via the rotating shaft, and the axial direction of the rotating shaft is parallel to the inner surface of the crucible or a section of the inner surface of the crucible.

[0013] In one embodiment, adjacent monomers are detachably connected.

[0014] In one embodiment, the guide portion includes two parallel and spaced-apart guide sub-portions, each of the guide sub-portions includes the first guide segment, the second guide segment, and the third guide segment, and the two guide sub-portions together form the guide groove;

[0015] The slotting tool further includes a movable member, which is movably connected between the two guide sub-parts along the extending direction of the guide slot.

[0016] In one embodiment, the movable part is located on the side of the two guide sub-parts facing away from the inner surface of the crucible, and has two slots respectively cooperating with the two guide sub-parts; the slots are constructed to allow the movable part to move along the two guide sub-parts.

[0017] In one embodiment, the slotting tool further includes an overlapping portion, the guide portion is fixedly connected to the overlapping portion, and overlaps with the edge of the opening through the overlapping portion.

[0018] In one embodiment, the slotting tool further includes a fastening portion, and the guide portion is fixed to the crucible via the fastening portion.

[0019] In one embodiment, the fastening portion is provided outside the crucible and includes a base plate and a clamping member, wherein the base plate is fixedly connected to the overlapping portion / the guide portion, and the clamping member is mounted on the base plate and can be operably moved close to or away from the guide portion located inside the crucible to clamp the crucible with the guide portion located inside the crucible.

[0020] The slotting tool adapts to crucibles of varying shapes and specifications by adapting its guide portion to conform to the crucible's inner surface, thus ensuring universal applicability. Furthermore, the guide portion forms a guide groove within the crucible, exposing its inner surface. The groove cutting machine, guided by the guide portion, accurately machines the exhaust groove within the exposed surface within the guide groove. Furthermore, because the guide groove extends along the edge of the crucible's open end, through the inner bottom wall, and to the edge of the other open end, the exhaust groove can be machined through the crucible's inner surface, achieving excellent exhaust efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic structural diagram of a slotting tool in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 The schematic diagram of the structure of the slotting tool and the crucible;

[0024] Figure 3 for Figure 1 A schematic structural diagram of the second guide section in the slotting tool shown;

[0025] Figure 4 for Figure 3 A partially enlarged schematic diagram of the second guide section is shown;

[0026] Figure 5 for Figure 3 The schematic diagram of the disassembled structure of the chain monomer in the second guide segment is shown;

[0027] Figure 6 for Figure 3 A schematic structural diagram of the connecting plate in the second guide section is shown;

[0028] Figure 7 for Figure 1 The schematic diagram of the structure of the movable parts in the slotting tool shown;

[0029] Figure 8 for Figure 1 A schematic diagram of a portion of the structure of the slotting tool shown;

[0030] Figure 9 for Figure 6 The front view of the partial structure is shown.

[0031] 100. Slotting tool; 10. Guide part; 11. Guide sub-part; 111. First guide section; 113. Second guide section; 115. Third guide section; 31. Monolith; 311. Main body; 3111. Sprocket; 3113. Chain plate; 313. Rotating shaft; 315. Connecting plate; 40. Movable part; 50. Overlap part; 70. Fastening part; 71. Base plate; 73. Threaded part; 77. Star-shaped handle; 200. Crucible; S. Accommodating chamber; C. Guide groove; P. Exhaust groove; K. Slot; D. Overlap groove. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0038] See also Figure 1 and Figure 2 One embodiment of the present invention provides a slotting tool 100 for slotting the inner surface of a crucible 200, which encloses a receiving cavity S with an open end. The slotting tool 100 includes a guide portion 10, which includes a first guide segment 111, a second guide segment 113, and a third guide segment 115 connected in sequence. The first guide segment 111 and the third guide segment 115 are arranged opposite each other. The guide portion 10 is constructed so that the shape formed by the first guide segment 111, the second guide segment 113, and the third guide segment 115 can be changed to fit the inner surface of the crucible. The first guide segment 111, the second guide segment 113, and the third guide segment 115 together form a guide groove that exposes the inner surface of the crucible. The guide groove extends from one side edge of the open end of the crucible through the inner bottom wall of the crucible to the other side edge of the open end. The guide groove is used to guide the slotting machine to process the exhaust groove on the inner surface of the crucible exposed by the guide groove.

[0039] The slotting tool 100 can be applied to carbon / carbon crucibles and similar types of crucibles. The accommodating cavity S of the crucible 200 is used to support a quartz crucible. The second guide section 113 is connected between the first guide section 111 and the third guide section 115. The first guide section 111 and the third guide section 115 are arranged on both sides of the second guide section 113. The guide portion 10 is composed of the first guide section 111, the second guide section 113 and the third guide section 115, and is constructed to be shape-changeable to fit the inner surface of the crucible 200. The shape change includes but is not limited to changes in dimensions such as length, changes in curvature and bending direction, etc. The inner surface of the crucible 200 is exposed in the guide groove C. Under the guidance of the guide portion 10, the cutter head of the slotting machine can act on the exposed inner surface of the guide groove C to process the exhaust groove P.

[0040] The slotting tool 100 adapts to crucibles 200 of varying shapes and specifications by adapting the guide portion 10 to conform to the inner surface of the crucible 200, thus providing universal functionality. Furthermore, the guide portion 10 forms a guide groove within the crucible 200, exposing its inner surface. Guided by the guide portion 10, the slotting machine can accurately machine exhaust grooves within the exposed surface within the guide groove. Furthermore, because the guide groove extends along the edge of the open end of the crucible 200, through the inner bottom wall, and to the edge of the other open end, an exhaust groove can be machined within the guide groove, extending through the inner surface of the crucible 200, achieving excellent exhaust efficiency.

[0041] Furthermore, the second guide segment 113 is configured to at least deform along with the inner bottom surface of the crucible 200 so as to conform to the inner bottom surface of the crucible 200. Furthermore, the second guide segment 113 is configured to have an adjustable length in its longitudinal direction, with the first guide segment 111 and the third guide segment 115 respectively connected to both ends of the second guide segment 113 in the longitudinal direction.

[0042] The crucible 200 includes a circumferential surface arranged along its own axial direction and a bottom surface located at one end of the circumferential surface, the two of which together form a receiving cavity, and the other end of the circumferential surface is an open end. The shape changes of different crucibles 200 are particularly reflected in the changes in the diameter and curvature of the bottom surface, wherein the inner bottom surface is the surface of the bottom surface located within the receiving cavity. The second guide section 113 is constructed to be able to follow the deformation of the inner bottom surface of the crucible 200, which means that the second guide section 113 can adapt to different shapes of the inner bottom surface of the crucible 200 and change differently with different inner bottom surfaces. While adjusting its own length in the longitudinal direction, the second guide section 113 can also change the distance between the first guide section 111 and the third guide section 115 connected to its two ends, thereby realizing the shape and size change of the slotting tool 100.

[0043] The guide portion 10 can change its shape by deformation and / or length change of the second guide segment 113 so as to fit with the inner surface of different crucibles 200 .

[0044] Please also refer to Figures 3 to 5 In some embodiments, the second guide section 113 includes a plurality of monomers 31 connected in sequence along its longitudinal direction, and adjacent monomers 31 are rotatably connected.

[0045] The second guide segment 113 is deformed by rotating between the monomers 31. It is understandable that in other embodiments, the second guide segment 113 can also be deformed by being made of deformable materials such as plastic materials, etc., which is not specifically limited here.

[0046] Furthermore, the monomer 31 includes a body 311 and a rotating shaft 313 . The bodies 311 of adjacent monomers 31 are rotatably connected via the rotating shaft 313 . The axial direction of the rotating shaft 313 is parallel to the inner surface of the crucible 200 or a cross section of the inner surface of the crucible 200 .

[0047] When the guide portion 10 is placed in the accommodating cavity, the monomer 31 of the second guide section 113 will rotate in the vertical plane under the action of gravity until it abuts against the inner surface of the crucible 200 and is supported. Therefore, when each monomer 31 rotates under the action of gravity until it abuts against the inner surface of the crucible 200, the second guide section 113 as a whole is in contact with the inner surface of the crucible 200.

[0048] On the one hand, the body 311 of each monomer 31 can be made of a relatively strong material to ensure the strength requirements of the guide and form a more stable guide groove. On the other hand, the rotation of the bodies 311 of adjacent monomers 31 via the rotating shaft 313 can cause the second guide section 113, which is made of a high-strength material as a whole, to deform. The axial direction of the rotating shaft 313 is parallel to the inner surface or a cross-section of the inner surface, so that the body 311 can only rotate around the rotating shaft 313 in a direction perpendicular to the inner surface, and cannot rotate in a direction tangential to the inner surface. The deformation of the second guide section 113 is limited to adapting to the shape of the inner surface of the crucible 200 without affecting the shape of the inner surface of the crucible 200 exposed by the guide groove. This enhances the versatility of the slotting tool 100 while ensuring its guiding accuracy.

[0049] Furthermore, adjacent monomers 31 are detachably connected.

[0050] In this way, the user can change the number of cells 31 in the second guide segment 113 by disassembling and assembling the cells 31, thereby adjusting the length of the second guide segment 113 in the longitudinal direction. It is understood that in other embodiments, the length can also be adjusted by a telescopic structure or other means, which is not specifically limited here.

[0051] In a specific embodiment, the second guide segment 113 is a chain composed of multiple chain monomers, and its body 311 includes a sprocket 3111 and a chain plate 3113. Each sprocket 3111 is connected to the adjacent sprocket 3111 through the chain plate 3113. The sprocket 3111 and the chain plate 3113 are detachably connected by a rotating shaft 313. The second guide segment 113 is provided with a connecting plate 315 (such as Figure 6 As shown in FIG, the connecting plate 315 is detachably connected to the first guide section 111 and the third guide section 115 through the rotating shaft 313.

[0052] In some embodiments, the guide portion 10 includes two parallel and spaced apart guide sub-portions 11 , each guide sub-portion 11 includes a first guide segment 111 , a second guide segment 113 , and a third guide segment 115 . The two guide sub-portions 11 together form a guide groove C.

[0053] The two guide sub-portions 11 are spaced apart from each other and in contact with the inner surface of the crucible 200, thereby forming a guide groove C. In other words, the guide groove C is located between the two guide sub-portions 11. Because the two are spaced apart, their contact with the inner surface of the crucible 200 is also spaced apart. The inner surface of the crucible 200 between the two is the exposed inner surface, where the exhaust groove P to be processed is formed.

[0054] The two spaced-apart guide sub-parts 11 can form the guide groove C while exposing the inner surface of the crucible 200 therebetween for processing.

[0055] Please also refer to Figure 7 Furthermore, the slotting tool 100 also includes a movable member 40, which is movably connected between the two guide sub-parts 11 along the extension direction of the guide groove C.

[0056] The movable part 40 can move along the guide groove C between the two guide sub-parts 11, and during the movement, with the help of its own fixed size, the distance between the two guide sub-parts 11 is uniformly adjusted to a standard value, making the specifications of the guide groove C more precise and the guiding effect better.

[0057] Furthermore, the movable member 40 is located on the side of the two guide sub-portions 11 facing away from the inner surface of the crucible 200 and has two slots K respectively engaged with the two guide sub-portions 11. The slots K are configured to allow the movable member 40 to move along the two guide sub-portions 11.

[0058] The movable part 40 is simultaneously clamped in the two guide sub-parts 11 on the side facing away from the inner surface of the crucible 200 through two slots K, and moves along the two guide sub-parts 11 when driven. The distance between the two slots K is designed according to the standard value of the spacing between the two guide sub-parts 11. Since the spacing between the two slots K is constant, during the movement of the movable part 40, the portion of the spacing between the two guide sub-parts 11 that is larger than the spacing between the slots K will be pulled closer, and the portion that is smaller than the spacing between the slots K will be pushed away, thereby adjusting the spacing between the two guide sub-parts 11 to the standard value during the sliding process. It is understandable that the movable part 40 can also adopt other structural forms, as long as it can be moved along the guide sub-parts 11 and the spacing between the guide sub-parts 11 can be adjusted during the movement, and no specific limitation is made here.

[0059] Please also refer to Figure 8 and Figure 9 In some embodiments, the slotting tool 100 further includes an overlapping portion 50 , the guide portion 10 is fixedly connected to the overlapping portion 50 , and overlaps with the edge of the opening through the overlapping portion 50 .

[0060] The guide portion 10 can overlap the edge of the crucible 200 opening via the overlapping portion 50 connected thereto, thereby achieving a stacking effect, allowing the guide portion 10 to be stably placed within the accommodating cavity S of the crucible 200 without tipping over. Specifically, the first guide segment 111 and the third guide segment 115 are both fixedly connected to the overlapping portion 50. The first guide segment 111 and the third guide segment 115 are overlapped at two opposing locations on the edge of the crucible 200 opening via their respective overlapping portions.

[0061] Furthermore, the overlap portion 50 is provided at the end of the guide portion 10 and forms an overlap groove D with the guide portion 10 facing and clamped at the open end of the crucible 200. The overlap portion is specifically provided at the ends of the first guide segment 111 and the third guide segment 115.

[0062] The overlapping portion 50 bends toward the outside of the crucible 200 to form an overlapping groove D with the first guide section 111 and the third guide section 115 located inside the crucible 200. The overlapping groove D can be stuck on the edge of the crucible 200 to provide a more stable positioning for the guide portion 10.

[0063] In some embodiments, the slotting tool 100 further includes a fastening portion 70 , and the guide portion 10 is fixed to the crucible 200 via the fastening portion.

[0064] The fastening portion 70 is used to fix the guide portion 10 and the crucible 200 to ensure that the guide portion 10 does not move during the slotting process, thereby preventing inaccurate slotting.

[0065] Furthermore, the fastening portion is disposed outside the crucible 200 and includes a base plate 71 and a clamping member. The base plate 71 is fixedly connected to the overlapping portion 50 / the guide portion 10. The clamping member is mounted on the base plate 71 and can be operably moved closer to or further away from the guide portion 10 located inside the crucible 200 to clamp the crucible 200 with the guide portion 10 located inside the crucible 200.

[0066] The fastening portion is located outside the crucible 200, while the guide portion 10 is at least partially located within the crucible 200 and in contact with the inner surface of the crucible 200. Therefore, the crucible 200 is partially located between the fastening portion and the guide portion 10. When the clamping member is controlled to approach the guide portion 10 within the crucible 200, the gap between the clamping member and the guide portion 10 within the crucible 200 decreases, thereby clamping the crucible 200 between the two, and the guide portion 10 is stably fixed by the fastening portion. When the clamping member is controlled to move away from the guide portion 10 within the crucible 200, the gap between the clamping member and the guide portion 10 within the crucible 200 increases, and the crucible 200 between the two is released, allowing the guide portion 10 to be removed from the crucible 200 or its angle to be adjusted.

[0067] It is understandable that in some other embodiments, other fastening methods such as spring clips may be used, as long as they can fix the guide portion 10 and the crucible 200 , and are not specifically limited here.

[0068] Furthermore, the clamping member is a screw member 73 . The base plate 71 is provided with a screw hole (not shown). The screw member 73 is passed through the screw hole and is operable to rotate to move closer to or away from the guide portion 10 in the crucible 200 .

[0069] The user can rotate the screw member 73 to quickly engage the clamping member with the guide portion 10 to clamp or loosen the crucible 200 .

[0070] In one embodiment, the base plate 71 is fixed between the overlapping portions 50 connected to the two guide sub-sections 11. This allows the screw member 73 to abut the outer surface of the crucible 200 from between the two guide sub-sections 11 while also securing the two guide sub-sections 11 via the overlapping portions 50. The end of the screw member 73 facing away from the guide section 10 is provided with a star-shaped handle 77, and the end closer to the guide section 10 is provided with an elastic washer (not shown). The star-shaped handle 77 facilitates user application of force to rotate the screw member 73. The elastic washer is provided at the end closer to the guide section 10, i.e., the end that abuts the crucible 200 during clamping, to prevent the screw member 73 from scratching or damaging the crucible 200.

[0071] In some embodiments, the guide portion 10 is axisymmetric along the central axis of the crucible 200. After processing the exhaust groove P, the guide portion 10 can be rotated along the inner surface of the crucible 200 to the next processing station to process another exhaust groove P.

[0072] When using the aforementioned slotting tool 100, the required length of the guide groove C is first determined based on the internal dimensions of the crucible 200 to be processed. The slotting tool's dimensions are then adjusted by disassembling and assembling the individual units 31 to adapt the tool to the desired crucible. Next, the first and third guide segments 111 and 115 are initially secured to two opposing locations on the open end of the crucible 200 via the slots K of their respective connecting lap joints 50. The second guide segment 113 is completely positioned within the accommodating cavity S. Under the influence of gravity, the individual units 31 rotate relative to each other, naturally conforming to the inner surface of the crucible 200. The guide portion 10 is then rotated within the accommodating cavity S to adjust it to the appropriate position. The movable member 40 is then slid to adjust the spacing between the two guide sub-sections 11 to the specified value. Finally, the threaded member 73 is rotated using the star-shaped handle 77 until it is secured to the crucible 200. At this point, the grooving machine can be used to machine the exhaust groove P on the inner surface of the crucible 200, exposed within the guide groove C of the guide portion 10, under the guidance of the guide portion 10. After processing, exit the slotting machine, turn the star-shaped handle 77 to remove the fixation of the guide part 10 and the crucible 200, take out the slotting tool 100 or turn the slotting tool 100 to move the guide part 10 to the next processing position, and process the next exhaust groove P.

[0073] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A slotting tool for slotting the inner surface of a crucible, wherein the crucible is enclosed to form a receiving cavity with an open end, characterized in that: The slotting tool comprises: a guide portion comprising a first guide segment, a second guide segment, and a third guide segment connected in sequence, wherein the first guide segment and the third guide segment are arranged opposite to each other, and the guide portion is configured such that the shape formed by the first guide segment, the second guide segment, and the third guide segment is changeable so as to conform to the inner surface of the crucible; The first guide section, the second guide section, and the third guide section jointly form a guide groove exposing the inner surface of the crucible; the guide groove extends from one side edge of the open end of the crucible through the inner bottom wall of the crucible to the other side edge of the open end, and the guide groove is used to guide the grooving machine to process the exhaust groove on the inner surface of the crucible exposed by the guide groove; The second guide section is configured to at least follow the deformation of the inner bottom surface of the crucible to fit the inner bottom surface of the crucible; the second guide section includes a plurality of monomers connected in sequence along its longitudinal direction, and adjacent monomers are rotatably connected; The monomer comprises a body and a rotating shaft, the bodies of adjacent monomers are rotatably connected via the rotating shaft, and the axial direction of the rotating shaft is parallel to the inner surface of the crucible or a section of the inner surface of the crucible; Adjacent monomers are detachably connected.

2. The slotting tool according to claim 1, characterized in that: The second guide segment is configured to be adjustable in length in its longitudinal direction, and the first guide segment and the third guide segment are respectively connected to two ends of the second guide segment in the longitudinal direction.

3. The slotting tool according to claim 1, characterized in that: The guide portion includes two parallel and spaced guide sub-portions, each of which includes the first guide segment, the second guide segment, and the third guide segment, and the two guide sub-portions together form the guide groove; The slotting tool further includes a movable member, which is movably connected between the two guide sub-parts along the extending direction of the guide slot.

4. The slotting tool according to claim 3, characterized in that: The movable member is located on the side of the two guide sub-parts facing away from the inner surface of the crucible and has two slots respectively matched with the two guide sub-parts; the slots are configured to allow the movable member to move along the two guide sub-parts.

5. The slotting tool according to claim 1, characterized in that: The slotting tool further includes an overlapping portion, the guide portion is fixedly connected to the overlapping portion, and is overlapped with the edge of the opening through the overlapping portion.

6. The slotting tool according to claim 5, characterized in that: The slotting tool further includes a fastening portion, and the guide portion is fixed to the crucible via the fastening portion.

7. The slotting tool according to claim 6, characterized in that: The fastening portion is provided outside the crucible and includes a base plate and a clamping member. The base plate is fixedly connected to the overlapping portion / the guide portion. The clamping member is installed on the base plate and can be operably moved close to or away from the guide portion located in the crucible to clamp the crucible with the guide portion located in the crucible.

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