Preparation tool for tungsten-copper and molybdenum-copper sheets

Abstract

The utility model provides a preparation tool for tungsten copper and molybdenum copper sheets. The preparation tool comprises a graphite boat, a graphite cushion block and a clamping block, the graphite boat is of a groove-shaped structure made of graphite materials, the graphite cushion blocks and the clamping blocks are of square structures, the graphite cushion blocks are made of the graphite materials, the graphite cushion blocks and the blanks are sequentially arranged at intervals, the blanks are located in gaps between every two adjacent graphite cushion blocks, and the two side faces of each blank are attached to the graphite cushion blocks on the front side and the graphite cushion blocks on the rear side respectively. A copper plate with preset mass is placed above the blank and erected on the tops of the graphite cushion blocks on the front side and the rear side of the blank; and the clamping block is clamped between the last graphite cushion block and the side wall of the graphite boat. According to the utility model, the tungsten-copper sheet and the molybdenum-copper sheet can be prepared from the tungsten blank and the molybdenum blank with the thickness of 1mm, so that the consumption of raw materials is greatly reduced; and meanwhile, when tungsten copper and molybdenum copper sheets are prepared, the infiltrated blank can be directly ground without surface milling, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tungsten copper and molybdenum copper preparation, and particularly relates to a preparation tooling for tungsten copper and molybdenum copper thin sheets. Background Art

[0002] Tungsten copper and molybdenum copper heat sink products mainly play a role in heat dissipation in integrated circuits. This requires that tungsten copper and molybdenum copper itself have relatively high thermal conductivity and good flatness. Usually, the flatness requirement for tungsten copper and molybdenum copper heat sink products is ≤ 0.05 mm. When preparing tungsten copper and molybdenum copper materials by infiltration process, it is necessary to first press the corresponding tungsten billets and molybdenum billet blanks, and then use the capillary principle to melt the copper sheet into copper liquid and infiltrate it into the existing blanks. Usually, an excessive amount of copper sheets are placed on the blanks during infiltration to ensure that the copper liquid can completely fill the gaps in the blanks. During the cooling process, after the temperature is lower than the melting point of copper, the copper liquid gradually solidifies into solid copper and adheres to the surface of the blanks. At this time, since the thermal expansion of pure copper is greater than that of tungsten copper and molybdenum copper, the shrinkage of pure copper is larger than that of tungsten copper and molybdenum copper. If the thickness of the tungsten copper and molybdenum copper blanks is less than 1.5 mm, they will be pulled and deformed by the adhered copper and bent. To ensure the flatness of tungsten copper and molybdenum copper after infiltration, tungsten copper and molybdenum copper thin sheets less than 0.5 mm thick need to be pressed into blanks with a thickness of at least 1.5 mm, and the extra thickness is removed by milling and grinding later, resulting in waste of raw materials and more processing procedures added. Content of the Utility Model

[0003] The purpose of the utility model is: aiming at the deficiencies in the above background art, to provide a solution with higher material utilization rate, directly grinding without milling, and improving production efficiency.

[0004] To achieve the above purpose, the utility model provides a preparation tooling for tungsten copper and molybdenum copper thin sheets, including a graphite boat, graphite pads, and clamping blocks;

[0005] The graphite boat is a trough-shaped structure made of graphite material. The graphite pads and the clamping blocks are both square structures. The graphite pads are made of graphite material. The graphite pads and the blanks are arranged at intervals in sequence. The blanks are located in the gaps between two adjacent graphite pads, and both sides of the blanks are respectively in contact with the front and rear graphite pads. A copper plate with a preset mass is placed above the blanks, and the copper plate is supported on the tops of the graphite pads on the front and rear sides of the blanks;

[0006] The clamping block is tightly clamped between the last graphite pad and the side wall of the graphite boat.

[0007] Further, the blanks are vertically arranged in the graphite boat in the thickness direction, and the distance between the front and rear graphite pads matches the thickness of the blanks.

[0008] Further, the thickness of the blank is less than 1 mm.

[0009] Further, the clamping block is a graphite block, a ceramic block or a high-temperature resistant metal block, and the material of the clamping block does not infiltrate and diffuse with copper.

[0010] Further, the graphite boat is provided with positioning holes and positioning bumps, and the positioning holes match the positioning bumps.

[0011] Further, the positioning bumps are arranged on the upper surface of the side wall of the graphite boat, and the positioning holes are arranged on the lower surface of the side wall of the graphite boat. The graphite boats are stacked in multiple layers, and the positioning bumps of the lower graphite boat are inserted into the positioning holes of the upper graphite boat.

[0012] The above solution of the present utility model has the following beneficial effects:

[0013] The preparation tooling for tungsten copper and molybdenum copper thin sheets provided by the present utility model, through the settings of graphite boats, graphite pads, clamping blocks, etc., when preparing tungsten copper and molybdenum copper thin sheets with a thickness of less than 0.5 mm, compared with the prior art where preparing tungsten copper and molybdenum copper thin sheets with a thickness of less than 0.5 mm requires at least preparing tungsten blanks and molybdenum blanks with a thickness of 1.5 mm, resulting in a material utilization rate of less than 33.3%, can be prepared with tungsten blanks and molybdenum blanks with a thickness of 1 mm, greatly reducing the consumption of raw materials; at the same time, when preparing tungsten copper and molybdenum copper thin sheets, the blank after infiltration can be directly ground without milling the surface, improving the production efficiency;

[0014] Other beneficial effects of the present utility model will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0015] Figure 1 is a cross-sectional view of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the graphite boat of the present utility model;

[0017] Figure 3 is another schematic diagram of the graphite boat of the present utility model.

[0018]

Explanation of the Reference Numerals in the Drawings

[0019] 1 - graphite boat; 2 - graphite pad; 3 - clamping block; 4 - blank; 5 - copper plate; 6 - positioning hole; 7 - positioning bump. Specific Implementation Modes

[0020] To make the technical problems, technical solutions, and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the protection scope of the present utility model. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 thus cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] As Figure 1 shown, an embodiment of the present utility model provides a preparation tooling for tungsten copper and molybdenum copper thin sheets, including a graphite boat 1, a graphite spacer 2, and a clamping block 3. Among them, the graphite boat 1 is a trough-shaped structure made of graphite material, and both the graphite spacer 2 and the clamping block 3 are square structures. The graphite spacer 2 is also made of graphite and jointly forms a cavity with the graphite boat 1 for supporting and preparing tungsten copper and molybdenum copper thin sheets. In the actual preparation process, to improve the utilization rate inside the graphite boat, by arranging the graphite spacers 2 and the blank 4 at intervals in turn, multiple tungsten copper and molybdenum copper thin sheets can be prepared simultaneously.

[0024] Among them, the blank 4 is placed vertically in the graphite boat in the thickness direction. At the same time, the distance between the two front and rear graphite spacers 2 matches the thickness of the blank 4, so that the blank 4 is limited by the two front and rear graphite spacers 2 during cooling after infiltration and will not deform as a whole. Therefore, when preparing tungsten copper and molybdenum copper thin sheets in this way, the thickness of the pressed blank 4 can be less than 1 mm.

[0025] In this embodiment, a copper plate 5 of a preset quality is placed above the blank 4, and at the same time, the copper plate 5 is mounted on two front and rear graphite pads 2. Therefore, the molten copper formed after the copper plate 5 melts under high temperature flows into the gap between the two graphite pads 2 and fills the voids of the blank, and an alloy sheet is formed after cooling.

[0026] It can be understood that when the graphite pads 2 and the blank 4 are arranged at intervals in turn, the interior of the graphite boat may not be exactly and completely filled, and there may be a certain gap remaining. To ensure that the graphite pads 2 clamp and limit the blank 4 and avoid gaps between the graphite pads 2 and the blank 4, etc., a clamping block 3 is used to tightly clamp between the last graphite pad 2 and the side wall of the graphite boat 1, so that the graphite pads 2, the blank 4 and the last clamping block 3 form a firm whole, so as to remain stable during the preparation of tungsten copper and molybdenum copper sheets. Among them, the clamping block 3 is a graphite block, a ceramic block or other high-temperature resistant metal blocks, etc., and no specific restrictions are made here as long as it is ensured that there is no infiltration and diffusion with copper.

[0027] At the same time, as Figures 2 - 3 shown, as a further improvement, positioning holes 6 and positioning protrusions 7 can also be further provided at the side wall position of the graphite boat 1 in this embodiment. For example, the positioning protrusion 7 is arranged on the upper surface of the side wall of the graphite boat 1, and the positioning hole 6 is arranged on the lower surface of the side wall of the graphite boat 1, so that the graphite boat 1 can be placed in multiple layers and then moved as a whole to the heating furnace for heating and the cooling area for cooling, thereby further improving the preparation efficiency of tungsten copper and molybdenum copper sheets. When placing in multiple layers, the positioning protrusion 7 of the lower graphite boat 1 is inserted into the positioning hole 6 of the upper graphite boat 1 to ensure the overall stability and prevent deviation and collapse during the preparation process.

[0028] When using the preparation tooling provided in this embodiment to prepare tungsten copper and molybdenum copper sheets with a thickness of less than 0.5 mm, the following steps are included:

[0029] Press tungsten blanks and molybdenum blanks with required components; take the graphite boat 1 and the graphite pads 2, and coat the inner surface of the graphite boat 1 and the graphite pads 2 with a mixture of graphite and water and dry it; place them in the graphite boat 1 in the order of graphite pad 2 - blank 4 - graphite pad 2 - blank 4 -... - blank 4 - graphite pad 2, where the blank 4 is placed vertically in the thickness direction, and a clamping block 3 (graphite block, ceramic block or other high-temperature resistant metal block that does not infiltrate and diffuse with copper) is used to tightly clamp between the last graphite pad 2 and the side wall of the graphite boat 1; place a copper plate 5 of corresponding quality above the blank 4 and at the same time mount it on two graphite pads 2; fill the voids of the graphite boat 1 with alumina powder and completely cover the copper plate 5; push the graphite boat 1 loaded with the blank 4 and the copper plate 5 into a heating furnace with a protective atmosphere for heat preservation and infiltration; push the graphite boat 1 to the cooling area for cooling and then take out the blank 4; shear the excess copper on the side; grind to the required thickness.

[0030] When preparing tungsten-copper and molybdenum-copper thin sheets with a thickness of less than 0.5 mm by using the preparation tooling provided in this embodiment, compared with the prior art where preparing tungsten-copper and molybdenum-copper thin sheets with a thickness of less than 0.5 mm requires preparing tungsten blanks and molybdenum blanks with a thickness of at least 1.5 mm, resulting in a material utilization rate of less than 33.3%, it can be prepared from tungsten blanks and molybdenum blanks with a thickness of 1 mm, and the highest material utilization rate can reach 50%, greatly reducing the consumption of raw materials. At the same time, when preparing tungsten-copper and molybdenum-copper thin sheets, the billet 4 after infiltration can be directly ground without milling, improving the production efficiency.

[0031] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0032] The above embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several deformations and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application should be subject to the appended claims.

Claims

1. A tool for preparing tungsten copper and molybdenum copper sheets, characterized in that: Including graphite boat, graphite pad, and card block; The graphite boat is a trough-shaped structure made of graphite material, the graphite pad and the clamping block are both square structures, the graphite pad is made of graphite material, the graphite pad and the blank are arranged in sequence, the blank is located in the gap between two adjacent graphite pads, and the two sides of the blank are respectively fitted with the graphite pads on the front and rear sides, a copper plate of preset mass is placed above the blank, and the copper plate is mounted on the top of the graphite pads on the front and rear sides of the blank; The clamping block is clamped and arranged between the last graphite pad and the side wall of the graphite boat.

2. A tooling for preparing tungsten copper and molybdenum copper sheets according to claim 1, characterized in that: The blank is placed vertically in the graphite boat in the thickness direction, and the distance between the front and rear graphite pads matches the thickness of the blank.

3. The tooling for preparing tungsten copper and molybdenum copper sheets according to claim 1, characterized in that: The thickness of the blank is less than 1 mm.

4. A tooling for preparing tungsten copper and molybdenum copper sheets according to claim 1, characterized in that: The block is a graphite block, a ceramic block or a high temperature resistant metal block, and the material of the block does not wet or diffuse with copper.

5. The tooling for preparing tungsten copper and molybdenum copper sheets according to claim 1, characterized in that: The graphite boat is provided with a positioning hole and a positioning protrusion, and the positioning hole matches the positioning protrusion.

6. A tooling for preparing tungsten copper and molybdenum copper sheets according to claim 5, characterized in that: The positioning protrusions are arranged on the upper surface of the graphite boat side wall, and the positioning holes are arranged on the lower surface of the graphite boat side wall. The graphite boats are placed in multiple layers, and the positioning protrusions of the lower graphite boats are inserted into the positioning holes of the upper graphite boats.

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