Self-centering positioning clamp

Abstract

The utility model provides a self-centering positioning clamp which comprises a disc body, the disc body is of a hollow structure, an annular groove is formed in the surface of one side of the disc body around the center in the circumferential direction, and the annular groove is used for being detachably connected with a machine tool. A positioning pin, a mistake-proof groove and at least two positioning holes are formed in the annular edge, higher than the annular groove and parallel to the annular groove, of the disc body, the positioning pin is arranged between the adjacent positioning holes, and the mistake-proof groove is formed in the opposite side of the positioning pin. By means of the structural design of the disc body, the design of the three-axis vertical machining center, the unique positioning holes, the unique positioning pins and the unique mistake-proof grooves, positioning can be rapidly conducted, the possibility of errors is avoided, the product and the disc body are concentric, the clamping frequency and the tool setting time can be reduced, the production efficiency is greatly improved, and the machining disc is simple in structure and suitable for popularization.

Description

Technical Field

[0001] The utility model belongs to the technical field of positioning fixtures and relates to a self-centering positioning fixture. Background Art

[0002] Currently, after workers use a crane to hoist the fixture onto a machine tool, they need to align the fixture so that the center of the fixture coincides with the center of rotation of the machine faceplate. However, there are still some problems in the centering process. For example, the machine faceplate is a flat workbench, and the fixture base is also flat. After the fixture is hoisted onto the machine tool using a crane, it cannot be accurately placed in a position that roughly coincides with the center of the machine tool. Sometimes the difference is tens of millimeters. If a heavy fixture is placed, these errors will cause a lot of friction when the fixture contacts the workbench plane. Therefore, moving the fixture to align is a time-consuming and laborious task. Workers use iron bars to knock, levers to pry, and other methods. Long-term operation will cause the machine tool workbench to be severely scratched, the fixture alignment belt will also be damaged, and the workbench spindle will also be affected by the impact of the alignment, resulting in a decrease in accuracy.

[0003] The existing technical solution discloses a machine tool faceplate-type centering device for a tool fixture, including a machine tool faceplate; a tool fixture supported on the machine tool faceplate and a plurality of positioning grooves provided on the machine tool faceplate, wherein the plurality of positioning grooves are evenly arranged along the center of the machine tool faceplate; and a plurality of positioning blocks installed on the tool fixture, wherein one end of the positioning block is threadedly connected to the tool fixture, and the other end of the positioning block is slidably mounted in the positioning groove.

[0004] The existing technical solution also discloses a vacuum suction cup type clamp with automatic centering function. The vacuum suction cup type clamp with automatic centering function has the structural characteristics of a rotating part. On the basis of the vacuum suction cup clamp, the design adds an automatic centering clamping structure, relying on a three-jaw chuck to achieve automatic centering and eliminate degrees of freedom; and uses a vacuum suction cup to achieve effective and stable clamping of parts.

[0005] The existing technical solution also discloses a chuck centering fixture, including a centering device and a chuck fixture; the chuck fixture is used to clamp and fix the workpiece to be processed; the chuck fixture is arranged above the centering device. When the drilling machine is processing a tapered hole in the workpiece, the centering device can balance the force on the chuck fixture, thereby preventing the machining center of the end face of the workpiece to be processed from deviating.

[0006] However, the existing technical solutions still have problems such as complex structure, long time to find the center, and low operating efficiency. Therefore, it is urgent to design and develop a self-centering positioning fixture to overcome the defects of the existing technology and meet the needs of actual applications. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a self-centering positioning fixture. In the present invention, through the structural design of the disc body and the use of a three-axis vertical machining center, the unique design of positioning holes, positioning pins and anti-error grooves can not only quickly position and avoid the possibility of errors, but also make the product concentric with the disc body, which can reduce the number of clamping times and tool setting time, greatly improve production efficiency, and has a simple structure and is suitable for promotion.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] The utility model provides a self-centering positioning fixture, which includes a disk body, which is a hollow structure, and a one side surface of the disk body is provided with an annular groove around the center circumference, and the annular groove is used for detachable connection to a machine tool; the disk body is provided with a positioning pin, an anti-error groove and at least two positioning holes on an annular edge higher than the annular groove and parallel to the annular groove, the positioning pin is provided between adjacent positioning holes, and the anti-error groove is provided on the opposite side of the positioning pin.

[0010] In the utility model, through the structural design of the disc body and the use of a three-axis vertical machining center, the unique design of positioning holes, positioning pins and anti-error grooves can not only quickly position and avoid the possibility of errors, but also make the product concentric with the disc body, which can reduce the number of clamping times and tool setting time, greatly improving production efficiency. The structure is simple and suitable for promotion.

[0011] It should be noted that the at least two positioning holes in the present invention can be, for example, 2, 3, 4, 5, 6, 7, 8, etc., but are not limited to the listed values. Other values ​​not listed within the numerical range are also applicable. The sizes of the positioning holes can be the same or different.

[0012] It should be noted that the present invention does not impose any particular restrictions on the specific dimensions of the disc, and those skilled in the art can adapt and adjust them according to actual conditions. The detachable connection method between the disc and the machine tool is also not particularly limited, and can be a snap connection or a threaded connection.

[0013] It should be noted that the annular groove in the present invention can facilitate the fixation of the fixture and the machine tool, and can be adapted to the machine tools of most vertical machining centers.

[0014] It should be noted that in the present invention, the anti-error groove is arranged on the opposite side of the positioning pin, that is, the anti-error groove and the positioning pin are symmetrically arranged. This structure can make the overall installation and identification more convenient.

[0015] It should be noted that the existing three-axis vertical machining center needs to be repeatedly clamped, repeatedly positioned, and the coordinate position of the product needs to be determined multiple times when processing products, which will result in repeated clamping errors, cumbersome operation, and low processing efficiency. The utility model is precisely limited by the specific structure, which only requires one clamping and fixing, avoiding clamping errors, and only requires one manual tool setting to start processing to the finished product, thereby improving processing efficiency.

[0016] As a preferred technical solution of the present invention, the disc body is an aluminum disc body.

[0017] It should be noted that aluminum is used as the material of the disk body in the present invention because it has small thermal deformation and good resistance to stress deformation. The focus can be on using A6061-T651 material, which can increase the rigidity of the clamp and reduce the compressive deformation of the clamp while ensuring strength.

[0018] As a preferred technical solution of the present invention, the diameter of the positioning pin is 4 to 5 mm, for example, it can be 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0019] As a preferred technical solution of the present invention, the height of the positioning pin is 7 to 8 mm, for example, it can be 7 mm, 7.1 mm, 7.2 mm, 7.3 mm, 7.4 mm, 7.5 mm, 7.6 mm, 7.7 mm, 7.8 mm, 7.9 mm, 8 mm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0020] The diameter of the locating pin in the present invention is 4-5 mm and the height is 7-8 mm because it is more convenient to process within this range. If it is not within this range, the scope of application of the clamp will be small. This is because the locating pin has a small diameter and can adapt to more types of products.

[0021] As a preferred technical solution of the present invention, the diameter of the positioning hole is 5 to 6 mm, for example, it can be 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0022] The diameter of the positioning hole in the present invention is 5 to 6 mm because processing is more convenient within this range. If it is not within this range, the scope of application of the fixture will be small. This is because the positioning hole has a small diameter and can adapt to more types of products.

[0023] It should be noted that the shape of the positioning hole is not particularly limited in the present invention, and those skilled in the art can make adaptive adjustments according to actual conditions. The positioning hole can be a round hole or a square hole.

[0024] As a preferred technical solution of the present invention, the anti-error groove is a through groove along the axial direction of the disk body.

[0025] The anti-mistake groove in the present invention is designed as a through groove in order to prevent the product from fitting with the fixture and being unable to vent air, thereby causing the product to be adsorbed and difficult to take out.

[0026] As a preferred technical solution of the present invention, the length of the anti-error groove is 30 to 31 mm, for example, it can be 30 mm, 30.1 mm, 30.2 mm, 30.3 mm, 30.4 mm, 30.5 mm, 30.6 mm, 30.7 mm, 30.8 mm, 30.9 mm, 31 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0027] Preferably, the width of the error-proofing groove is 9 to 10 mm, for example, it can be 9 mm, 9.1 mm, 9.2 mm, 9.3 mm, 9.4 mm, 9.5 mm, 9.6 mm, 9.7 mm, 9.8 mm, 9.9 mm, 10 mm, etc., but it is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0028] The length of the error-proofing groove in the present invention is 30-31 mm and the width is 9-10 mm, because it is convenient to process and install within this range.

[0029] As a preferred technical solution of the present invention, the depth of the anti-error groove is 5 to 6 mm, for example, it can be 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, etc., but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0030] The depth of the anti-error groove in the present invention is 5 to 6 mm, because it is convenient to process and install within this range.

[0031] As a preferred technical solution of the present invention, the height of the disk is 40 to 50 mm, for example, it can be 40 mm, 40.1 mm, 40.2 mm, 40.3 mm, 40.4 mm, 40.5 mm, 40.6 mm, 40.7 mm, 40.8 mm, 40.9 mm, 50 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0032] Preferably, the height of the annular groove is 18 to 20 mm, for example, it can be 18 mm, 18.2 mm, 18.4 mm, 18.6 mm, 18.8 mm, 19 mm, 19.2 mm, 19.4 mm, 19.6 mm, 19.8 mm, 20 mm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0033] The height of the annular groove in the present invention is 18 to 20 mm, because within this range it is better applicable to the semiconductor industry and covers most different types of gas distribution plates.

[0034] As a preferred technical solution of the present invention, the side of the disc body facing away from the annular groove is a plane, and at least four threaded holes are provided near the edge of the plane, and the threaded holes are used to fasten the product.

[0035] It should be noted that the at least four threaded holes in the present invention can be, for example, 4, 5, 6, 7, 8, etc., but are not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable.

[0036] Preferably, the diameter of the threaded hole is 5 to 6 mm, for example, it can be 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, etc., but it is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] In the utility model, through the structural design of the disc body and the use of a three-axis vertical machining center, the unique design of positioning holes, positioning pins and anti-error grooves can not only quickly position and avoid the possibility of errors, but also make the product concentric with the disc body, which can reduce the number of clamping times and tool setting time, greatly improving production efficiency. The structure is simple and suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic structural diagram of a self-centering positioning fixture provided in a specific embodiment of the present utility model;

[0040] Among them, 1-disc body; 2-positioning hole; 3-positioning pin; 4-anti-error groove. DETAILED DESCRIPTION

[0041] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like 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, and do not indicate or imply 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", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] It should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0044] In a specific embodiment, the present invention provides a self-centering positioning fixture, such as Figure 1 As shown, the positioning fixture includes a disk body 1, which is a hollow structure, and an annular groove is provided on one side surface of the disk body 1 around the center circumference, and the annular groove is used for detachable connection to the machine tool; the disk body 1 is provided with a positioning pin 3, an anti-error groove 4 and at least two positioning holes 2 on an annular edge higher than the annular groove and parallel to the annular groove, a positioning pin 3 is provided between adjacent positioning holes 2, and the anti-error groove 4 is provided on the opposite side of the positioning pin 3.

[0045] It should be noted that the at least two positioning holes 2 in the present invention can be, for example, 2, 3, 4, 5, 6, 7, 8, etc., but are not limited to the listed values. Other values ​​not listed within the numerical range are also applicable. The sizes of the positioning holes 2 can be the same or different.

[0046] It should be noted that the present invention does not impose any particular restrictions on the specific dimensions of the disc 1, and those skilled in the art can adapt and adjust them according to actual conditions. The detachable connection method between the disc 1 and the machine tool is also not particularly limited, and can be a snap connection or a threaded connection.

[0047] It should be noted that the annular groove in the present invention can facilitate the fixation of the fixture and the machine tool, and can be adapted to the machine tools of most vertical machining centers.

[0048] Furthermore, the tray body 1 is an aluminum tray body 1 .

[0049] It should be noted that aluminum is used as the material of the disk body 1 in the present invention because it has small thermal deformation and good resistance to stress deformation. The focus can be on using A6061-T651 material, which can increase the rigidity of the clamp and reduce the compressive deformation of the clamp while ensuring strength.

[0050] Furthermore, the diameter of the positioning pin 3 is 4 to 5 mm, for example, it can be 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0051] Furthermore, the height of the positioning pin 3 is 7 to 8 mm, for example, it can be 7 mm, 7.1 mm, 7.2 mm, 7.3 mm, 7.4 mm, 7.5 mm, 7.6 mm, 7.7 mm, 7.8 mm, 7.9 mm, 8 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0052] Furthermore, the diameter of the positioning hole 2 is 5 to 6 mm, for example, it can be 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0053] It should be noted that the present invention does not specifically limit the shape of the positioning hole 2, and those skilled in the art can make adaptive adjustments according to actual conditions. Among them, the positioning hole 2 can be a round hole, a square hole, etc.

[0054] Furthermore, the anti-error groove 4 is a through groove along the axial direction of the disc body 1 .

[0055] Furthermore, the length of the error-proofing groove 4 is 30 to 31 mm, for example, it can be 30 mm, 30.1 mm, 30.2 mm, 30.3 mm, 30.4 mm, 30.5 mm, 30.6 mm, 30.7 mm, 30.8 mm, 30.9 mm, 31 mm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0056] Furthermore, the width of the anti-error groove 4 is 9 to 10 mm, for example, it can be 9 mm, 9.1 mm, 9.2 mm, 9.3 mm, 9.4 mm, 9.5 mm, 9.6 mm, 9.7 mm, 9.8 mm, 9.9 mm, 10 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0057] Furthermore, the depth of the anti-error groove 4 is 5 to 6 mm, for example, it can be 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0058] Furthermore, the height of the disk body 1 is 40 to 50 mm, for example, it can be 40 mm, 40.1 mm, 40.2 mm, 40.3 mm, 40.4 mm, 40.5 mm, 40.6 mm, 40.7 mm, 40.8 mm, 40.9 mm, 50 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0059] Furthermore, the height of the annular groove is 18 to 20 mm, for example, it can be 18 mm, 18.2 mm, 18.4 mm, 18.6 mm, 18.8 mm, 19 mm, 19.2 mm, 19.4 mm, 19.6 mm, 19.8 mm, 20 mm, etc., but is not limited to the listed values, and other unlisted values ​​within this numerical range are also applicable.

[0060] Furthermore, the side of the disc body 1 facing away from the annular groove is a plane, and at least four threaded holes are provided near the edge of the plane, and the threaded holes are used to fasten the product.

[0061] It should be noted that the at least four threaded holes in the present invention can be, for example, 4, 5, 6, 7, 8, etc., but are not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable.

[0062] Furthermore, the diameter of the threaded hole is 5 to 6 mm, for example, it can be 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0063] Example 1

[0064] This embodiment provides a self-centering positioning fixture, wherein:

[0065] The positioning fixture includes a disk body 1, which is an aluminum disk body 1 with a hollow structure, and an annular groove is provided on one side surface of the disk body 1 around the center circumference, and the annular groove is used for detachable connection to the machine tool; the disk body 1 is provided with a positioning pin 3, an anti-error groove 4 and two positioning holes 2 on an annular edge higher than the annular groove and parallel to the annular groove, a positioning pin 3 is provided between adjacent positioning holes 2, and the anti-error groove 4 is provided on the opposite side of the positioning pin 3.

[0066] The diameter of the positioning pin 3 is 5 mm, the height of the positioning pin 3 is 8 mm, and the diameter of the positioning hole 2 is 6 mm.

[0067] The anti-error groove 4 is a through groove along the axial direction of the disc body 1. The length of the anti-error groove 4 is 30 mm, the width of the anti-error groove 4 is 9 mm, and the depth of the anti-error groove 4 is 5 mm.

[0068] The height of the disk body 1 is 40 mm, the height of the annular groove is 18 mm, and the side of the disk body 1 facing away from the annular groove is a plane. Four threaded holes are provided near the edge of the plane. The threaded holes are used to fasten the product, and the aperture of the threaded holes is 5 mm.

[0069] In summary, the utility model adopts a three-axis vertical machining center through the structural design of the disc body 1, and the unique design of the positioning hole 2, positioning pin 3 and anti-error groove 4. It can not only quickly position and avoid the possibility of errors, but also make the product concentric with the disc body 1, which can reduce the number of clamping times and tool setting time, greatly improve production efficiency, and has a simple structure and is suitable for promotion.

[0070] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A self-centering positioning fixture, characterized in that: The positioning fixture includes a disk body, which is a hollow structure, and a circular groove is provided on one side surface of the disk body around the center circumference, and the circular groove is used for detachable connection to the machine tool; The disc body is provided with a positioning pin, an anti-error groove and at least two positioning holes on an annular edge higher than the annular groove and parallel to the annular groove, the positioning pin is provided between adjacent positioning holes, and the anti-error groove is provided on the opposite side of the positioning pin; The diameter of the positioning pin is 4-5 mm, and the height of the positioning pin is 7-8 mm; The height of the annular groove is 18-20 mm.

2. The self-centering positioning fixture according to claim 1, characterized in that The tray body is an aluminum tray body.

3. The self-centering positioning fixture according to claim 1, characterized in that The diameter of the positioning hole is 5-6 mm.

4. The self-centering positioning fixture according to claim 1, characterized in that The anti-error groove is a through groove along the axial direction of the disc body.

5. The self-centering positioning fixture according to claim 1, characterized in that The length of the error-proofing groove is 30-31 mm, and the width of the error-proofing groove is 9-10 mm.

6. The self-centering positioning fixture according to claim 1, characterized in that The depth of the error-proofing groove is 5-6 mm.

7. The self-centering positioning fixture according to claim 1, characterized in that The height of the disc is 40-50 mm.

8. The self-centering positioning fixture according to claim 1, characterized in that The side of the disc body facing away from the annular groove is a plane, and at least four threaded holes are provided near the edge of the plane, and the threaded holes are used to fasten the product; The diameter of the threaded hole is 5-6 mm.

Images