Vacuum adsorption type clamp for milling surface of heat sink material

Abstract

The utility model provides a vacuum adsorption type clamp for milling a heat sink material. The vacuum adsorption type clamp comprises a base plate, a base, an air nozzle, a first sealing ring and a cover plate, the base is connected with the base plate, a vacuum cavity is formed in the base, the air tap is arranged on the base, and the vacuum cavity is communicated with a vacuum system through the air tap; the first sealing ring is arranged on the base and used for sealing a gap between the vacuum cavity and the cover plate, and the cover plate is detachably connected with the base; a plurality of adsorption grooves are formed in the upper surface of the cover plate, supporting strips and air holes are formed in the adsorption grooves at intervals, the supporting strips are used for supporting a blank of the heat sink material, and the air holes penetrate through the thickness of the cover plate and communicate with the vacuum cavity. According to the utility model, the problems of large grinding amount and low processing efficiency caused by large flatness and parallelism due to a traditional clamping mode are solved, the surface milling processing quality of the heat sink material is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat sink material processing, in particular to a vacuum adsorption clamp used for milling surfaces of heat sink materials. Background Art

[0002] At present, it is difficult to form a regular blank with high precision after the preparation of the heat sink material is completed. It needs to be roughed or finely processed before it can be used for normal production. In particular, the thickness direction of the blank is very uneven, and the surface needs to be milled. The traditional milling clamping method is to directly clamp the side of the blank with a vise for milling. However, this clamping method is cumbersome to operate, and when the clamped side is irregular, it is difficult to form a reasonable reference surface, which directly affects the flatness and parallelism of the processing, and the amount of material grinding is too large, resulting in low processing efficiency. In order to avoid this problem, ensure the processing quality, and reduce the amount of material grinding, it is necessary to design a special fixture for milling the heat sink material to ensure the flatness and parallelism of the milling surface, reduce the amount of material grinding, and improve processing efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a special fixture for milling the surface of heat sink materials using vacuum adsorption to address the deficiencies in the above-mentioned background technology, so as to ensure the flatness and parallelism of the milling surface, reduce the amount of material grinding, and improve processing efficiency.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a vacuum adsorption fixture for milling the surface of a heat sink material, comprising a substrate, a base, an air nozzle, a first sealing ring and a cover plate; the base is connected to the substrate, a vacuum cavity is arranged inside the base, the air nozzle is arranged on the base, the vacuum cavity is connected to a vacuum system through the air nozzle, and the vacuum system is used to evacuate air in the vacuum cavity to generate negative pressure; the first sealing ring is arranged on the base, the first sealing ring is used to seal the gap between the vacuum cavity and the cover plate, and the cover plate is detachably connected to the base; a plurality of adsorption grooves are arranged on the upper surface of the cover plate, support bars and air holes are arranged at intervals in the adsorption grooves, the support bars are used to support the blank of the heat sink material, and the air holes penetrate the thickness of the cover plate and are connected to the vacuum cavity.

[0005] Furthermore, a plurality of partition blocks are arranged in the base, and the partition blocks divide the vacuum cavity into a plurality of sub-cavities interconnected with each other.

[0006] Furthermore, the size of the air nozzle is selected according to the adsorption area and design requirements, and the negative pressure generated by the vacuum system ranges from -0.1 to 0 MPa.

[0007] Furthermore, the first sealing ring is made of a material that is resistant to high temperatures and is not prone to foaming, and the cross-sectional diameter of the first sealing ring is 0.5-5.0 mm.

[0008] Furthermore, the cover plate and the base are both provided with a plurality of bolt holes corresponding to each other, and the cover plate and the base are fixed by bolts.

[0009] Furthermore, the size of the adsorption tank matches the blank.

[0010] Furthermore, a second sealing ring is provided at the edge of the adsorption groove, and the second sealing ring contacts the lower surface of the blank, so that the blank and the adsorption groove form a sealed cavity and generate negative pressure.

[0011] Furthermore, the number and positions of the adsorption slots are distributed in a one-to-one correspondence with the sub-cavities of the vacuum cavity.

[0012] Furthermore, the shapes of the adsorption groove and the vacuum chamber include but are not limited to square and circle.

[0013] The above solution of the utility model has the following beneficial effects:

[0014] The vacuum adsorption fixture for heat sink material milling provided by the utility model forms negative pressure in the vacuum chamber through the vacuum system. After the blank is placed in the position of the adsorption slot, the blank can be firmly adsorbed by relying on the negative pressure to clamp the blank and limit the processing surface. When the blank is milled by the milling equipment, the reference surface can be reasonably processed and the difference caused by processing deformation can be avoided through a reasonable fixture structure and clamping method. At the same time, the flatness and parallelism of the milling surface are guaranteed through the fixture structure, thereby solving the problems of large flatness and parallelism caused by the traditional clamping method, resulting in large grinding amount and low processing efficiency, improving the quality of heat sink material milling processing and reducing production costs.

[0015] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the interior of the base of the utility model;

[0018] Figure 3 for Figure 1 A magnified image of point A;

[0019] Figure 4 It is a schematic diagram of a blank for clamping a heat sink material according to the utility model.

[0020] [Description of Reference Numerals]

[0021] 1-substrate; 2-base; 3-air nozzle; 4-first sealing ring; 5-cover plate; 6-vacuum chamber; 7-partition block; 8-bolt hole; 9-adsorption groove; 10-support bar; 11-air hole; 12-blank material; 13-second sealing ring. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1 As shown, an embodiment of the utility model provides a vacuum adsorption fixture for milling the surface of heat sink materials, including a substrate 1, a base 2, an air nozzle 3, a first sealing ring 4 and a cover plate 5. The substrate 1 is located at the bottom of the entire fixture, and is used to support and fix the entire fixture 1. At the same time, the substrate 1 can be fixed on different working surfaces to flexibly adjust the clamping angle of the fixture and the milling processing. The base 2 is arranged on the upper surface of the substrate 1, and a vacuum cavity 6 is arranged inside the base 2. At the same time, Figure 2As shown, as a preferred embodiment, a partition block 7 is further provided in the base 2 in this embodiment. The vacuum cavity 6 is divided into four sub-cavities by the partition block 7. Of course, each sub-cavity is still connected, and the whole forms a shape similar to a "field" character. The air nozzle 3 is provided on the side wall of the base 2, and the vacuum cavity 6 is connected to the vacuum system through the air nozzle 3, and the vacuum system evacuates the air in the vacuum cavity 6 to generate negative pressure. Among them, the size of the air nozzle 3 can be selected between M2-M20 according to the adsorption area and design requirements, and the negative pressure range generated by the vacuum system is between -0.1 and 0 Mpa.

[0026] In this embodiment, the first sealing ring 4 is arranged in the sealing ring groove on the upper edge of the base 2, that is, the upper part of the vacuum cavity 6. The first sealing ring 4 seals the gap between the vacuum cavity 6 and the cover plate 5. Among them, the first sealing ring 4 is made of a material that is resistant to high temperature and not easy to foam, and the first sealing ring 4 can be selected between a cross-sectional diameter of 0.5-5.0 mm according to requirements.

[0027] It should be noted that the illustrated base 2 and the vacuum cavity 6 are both in a square form. Therefore, the first sealing ring 4 also correspondingly adopts a square form to fully seal the gap between the cover plate 5 and the base 2.

[0028] In this embodiment, the cover plate 5 is arranged on the upper surface of the base 2. A plurality of bolt holes 8 are provided on both the cover plate 5 and the base 2 and correspond to each other. The cover plate 5 and the base 2 are fixed by bolts, and at the same time, the first sealing ring 4 located between the cover plate 5 and the base 2 is pressed tightly by the thread force, so that the vacuum cavity 6 forms a sealed state.

[0029] At the same time, as shown in Figure 3 、 Figure 4 On the upper surface of the cover plate 5, a plurality of adsorption grooves 9 are provided. The adsorption grooves 9 are formed with a certain degree of depression relative to the upper surface of the cover plate 5. Support bars 10 and air holes 11 are arranged at intervals in the adsorption grooves 9. The support bars 10 are used to support the blank 12 of the heat sink material, and the air holes 11 penetrate through the thickness of the cover plate 5 and are connected to the vacuum cavity 6. Under the negative pressure of the vacuum cavity 6, the blank 12 placed at the position of the adsorption groove 9 is adsorbed and fixed.

[0030] As a preferred embodiment, the number and position of the adsorption grooves 9 in this embodiment correspond to the sub-cavities of the vacuum cavity 6 to make the adsorption effect below the adsorption grooves 9 better. At the same time, to further improve the adsorption effect, a second sealing ring 13 is also arranged in the sealing ring groove at the edge position of the adsorption groove 9 in this embodiment. The second sealing ring 13 contacts the lower surface of the blank 12. Under the negative pressure, the blank 12 presses the second sealing ring 13 downward, so that the adsorption groove 9 also forms a sealed cavity and forms negative pressure, further improving the adsorption stability of the blank 12.

[0031] It should be noted that the adsorption groove 9 shown in the figure is also in a square form, so the second sealing ring 13 is also in a square form accordingly, so that the gap between the blank 12 and the adsorption groove 9 can be fully sealed. Of course, in other embodiments, the blank 12 can also be circular or other shapes, and in this case, the adsorption groove 9, the second sealing ring 13, etc. can also be matched to be set to be circular or other shapes, and no specific limitation is made here.

[0032] Using the vacuum adsorption fixture for milling the surface of heat sink materials provided in this embodiment, first insert the first sealing ring 4 into the sealing ring groove at the upper edge of the base 2 and fit it, then cover the cover plate 5 and install the bolts to fasten the cover plate 5 to the base 2. Install the second sealing ring 13 in each adsorption groove 9 of the cover plate 5, which is inserted into the sealing ring groove at the edge of the adsorption groove 9 and fits it. Connect the air nozzle 3 to the vacuum system through a pipeline, and start the vacuum system to form a negative pressure in the vacuum chamber 6. Place the blank 12 at the position of the adsorption groove 9 and contact the second sealing ring 13. Relying on the negative pressure, the blank 12 can be firmly adsorbed, thereby completing the clamping of the blank 12 and the limiting of the processing surface.

[0033] The blank 12 is then milled (rough or fine) by a milling device. A reasonable fixture structure and clamping method can be used to reasonably machine the reference surface and avoid differences caused by machining deformation. At the same time, the flatness and parallelism of the milled surface are ensured by the fixture structure, thereby solving the problem of large flatness and parallelism caused by the traditional clamping method, resulting in large grinding volume and low machining efficiency.

[0034] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0035] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A vacuum adsorption fixture for milling the surface of heat sink materials, characterized in that: It includes a substrate, a base, an air nozzle, a first sealing ring and a cover plate; the base is connected to the substrate, a vacuum cavity is arranged inside the base, the air nozzle is arranged on the base, the vacuum cavity is connected with a vacuum system through the air nozzle, and the vacuum system is used to evacuate the vacuum cavity to generate negative pressure; the first sealing ring is arranged on the base, the first sealing ring is used to seal the gap between the vacuum cavity and the cover plate, and the cover plate is detachably connected to the base; a plurality of adsorption grooves are arranged on the upper surface of the cover plate, support bars and air holes are arranged at intervals in the adsorption grooves, the support bars are used to support the blank of the heat sink material, and the air holes penetrate the thickness of the cover plate and are connected with the vacuum cavity.

2. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 1, characterized in that: A plurality of partition blocks are arranged in the base, and the partition blocks divide the vacuum cavity into a plurality of sub-cavities which are interconnected.

3. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 1, characterized in that: The size of the air nozzle is selected according to the adsorption area and design requirements, and the negative pressure range generated by the vacuum system is -0.1 to 0 MPa.

4. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 1, characterized in that: The first sealing ring is made of a material that is resistant to high temperatures and is not prone to foaming, and the cross-sectional diameter of the first sealing ring is 0.5-5.0 mm.

5. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 1, characterized in that: The cover plate and the base are both provided with a plurality of bolt holes corresponding to each other, and the cover plate and the base are fixed by bolts.

6. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 1, characterized in that: The size of the adsorption tank matches the blank.

7. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 1, characterized in that: A second sealing ring is also provided at the edge of the adsorption groove, and the second sealing ring contacts the lower surface of the blank, so that the blank and the adsorption groove form a sealed cavity and generate negative pressure.

8. The vacuum adsorption fixture for milling the surface of heat sink materials according to claim 2, characterized in that: The number and positions of the adsorption slots are distributed in one-to-one correspondence with the sub-cavities of the vacuum cavity.

9. A vacuum adsorption fixture for milling the surface of heat sink materials according to any one of claims 1 to 8, characterized in that: The shapes of the adsorption groove and the vacuum chamber include but are not limited to square and circular.

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