A tool for ball pit machining and its use method

Abstract

The present invention relates to a tool for machining ball pits and a method for using the same, and is particularly suitable for machining ball pits similar to those in automobile air-conditioning compressor pistons. The present invention discloses a tool for machining ball pits, comprising a tool handle and a tool head; the tool heads are at least two, one of which has a larger blade radius than the other; the blade radius of the tool head with the larger radius is smaller than the radius of the ball pit in the workpiece to be machined, and the blades of the tool head with the larger radius and the tool head with the smaller radius are located in the same plane. The present invention also discloses a method for using the tool. The ball pits machined using the tool and method described above meet various requirements for roundness, roughness, and other indicators, and are highly efficient.

Description

Technical Field

[0001] The invention relates to a tool for machining ball pits and a use method thereof, and is particularly suitable for machining ball pits similar to those of automobile air-conditioning compressor pistons. Background Art

[0002] In mechanical processing, ordinary milling cutters can only clean planes or grooves, and the angle between the groove and the bottom surface is 90 degrees. Ordinary tools cannot realize the processing of spherical pits.

[0003] Since the structure of the ball pit of the compressor piston is relatively special, it is difficult to machine the piston ball pit using ordinary machining tools during the machining process.

[0004] Zhejiang Yifeng Machinery Factory, in its 2011 patent application number CN201120311144.0, titled "A Tool for Machining Piston Ball Holes," disclosed a tool comprising a spherical handle and a spherical head. The top of the head forms a flat surface perpendicular to the axis, with four cutting edges arranged in a cross-section. Each of these cutting edges has a consistent vertical offset from the center. During machining, this tool experiences vibrations, which affect the roundness and roughness of the finished ball hole, as the circumference of the finishing tool is equal to the arc of the product's ball hole. A larger circumference generates greater cutting forces, leading to vibrations and "chatter marks." This vibration affects the roundness and roughness of the finished ball hole.

[0005] With the development of automotive parts, the precision requirements of products are getting higher and higher. At the same time, reducing costs and improving efficiency are the current main tasks. This problem has always troubled companies. Summary of the Invention

[0006] In order to solve the above technical deficiencies, the present invention provides a special tool for avoiding the precision problem caused by vibration when machining a ball pit and a method for using the tool.

[0007] The invention discloses a tool for processing ball pits, which comprises a tool handle and a tool head. There are at least two tool heads, wherein the blade radius of one tool head is larger than the blade radius of the other tool head. The blade radius of the tool head with a larger radius is smaller than the radius of the ball pit of a workpiece to be processed, and the blade of the tool head with a larger radius and the blade of the tool head with a smaller radius are located in the same plane.

[0008] In order to make the product quality more reliable after processing, the radius of the cutter head with a large radius is equal to the radius of the ball pit of the workpiece to be processed minus the finishing allowance.

[0009] In order to reduce the number of tool installation and tool adjustment and improve precision, the tool heads are two optimal ones and the blades of the two tool heads are located on the left and right sides of the tool handle axis respectively. Products with this structure are particularly suitable for processing ball pits of automobile air-conditioning compressor pistons.

[0010] In order to facilitate the processing and use of the tool, the highest points of the blades of the two tool heads are facing each other.

[0011] Use the above tools to process the products to be processed: first clamp the tool, align the center point, that is, the axis of the tool holder passes through the center point of the ball, and at the same time, the center point of the blade of the tool head with a large radius is located on the axis of the workpiece to be added, and the tool head with a large radius is approached to the surface to be processed of the workpiece, and the workpiece rotates so that the center point of the blade of the tool head with a large radius coincides with the center point of the ball pit to be processed. The tool does not rotate to complete the first cutting; the second step of processing is to retract the tool and move the tool in the opposite direction, that is, the tool head with a small radius moves toward the ball pit in the other direction so that its blade can process the edge of one end of the ball pit, and the blade of the tool head with a small radius cuts along the finished arc of the ball pit until the second cutting of the workpiece is completed.

[0012] In order to better ensure the quality of product processing, the second step of processing can be specifically: the tool is retracted until the tool does not touch the workpiece when moving, and the tool head with a small radius moves toward the ball pit at the other end so that its blade can process the edge of one end of the ball pit. The center point of the blade of the tool head with a small radius moves toward the workpiece so that it is flush with the center point of the ball of the workpiece to be processed and continues to move toward the workpiece for the finishing allowance of the workpiece to be processed. The workpiece is rotated, and the tool moves in an arc. The radius of the arc moved by the tool is the difference between the radius of the working tool head and the radius of the ball pit of the workpiece to be processed, until the second cutting of the workpiece is completed.

[0013] The ball pits processed by the above-mentioned tools and methods can meet the requirements of roundness, roughness and other indicators with high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the piston structure of an automobile air-conditioning compressor;

[0016] Figure 3 The present invention is a three-dimensional Figure 1 ;

[0017] Figure 4 The present invention is a three-dimensional Figure 2 . DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0019] Example 1:

[0020] according to Figure 1, Figure 2 , Figure 3 , Figure 4 As shown, the ball pit of the piston of the automobile air-conditioning compressor is processed. Because the product is processed to form two opposite spherical grooves 3, the spherical groove 3 is referred to as the ball pit. The radius corresponding to the spherical groove is 9.0275mm. The tool used for ball pit processing includes a tool handle 1 and a tool head; there are two tool heads, namely 2 and 4, one of which has a blade radius of 8.9mm and the other has a blade radius of 7mm; the blade 5 of the tool head 2 and the blade 6 of the tool head 4 are on the same plane, and the tool head 2 and the tool head 4 are respectively located on both sides of the axis of the tool handle 1. The blade surface of the tool head 2 and the blade surface of the tool head 4 are arranged in reverse, that is, the two blade surfaces face oppositely; the highest points of the blade 5 and the blade 6 are facing each other.

[0021] First, clamp the tool and align the center point; feed, use the cutter head 2 with a large radius to approach the surface to be processed of the workpiece, so that the center of the circle of the blade 5 of the cutter head 2 coincides with the center point of the circle of the ball pit 301 to be processed, then the tool does not move, and the workpiece is rotated to complete the first cutting; the second step is to retract the tool, so that the tool does not touch the workpiece when moving. When it is retracted, the cutter head 4 with a small radius moves toward the ball pit 302 at the other end so that its blade can process the edge of one end of the ball pit 302, and the cutter head 4 with a small radius moves toward the workpiece to the plane where the center point 5 of the workpiece to be processed is located and continues to move toward the workpiece for the finishing allowance of the workpiece to be processed. This plane is perpendicular to the axis l of the workpiece to be processed, and the workpiece is rotated. The tool moves in an arc, and the radius of the arc traveled by the tool is the difference between the radius of the working cutter head and the radius of the ball pit of the workpiece to be processed, until the second cutting of the workpiece is completed.

[0022] Example 2:

[0023] The difference from Example 1 is that the blade surface of the blade head 2 and the blade surface of the blade head 4 are arranged in the same direction.

[0024] Example 3:

[0025] The difference from the embodiment is that the highest points of the blade 5 and the blade 6 are not directly opposite.

[0026] In the description of the present application, 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" 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 application 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 application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to the interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any simplified modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for processing a product using a tool, characterized in that: First, clamp the tool and align the center point, that is, the axis of the tool holder passes through the center point of the ball. At the same time, the center point of the blade of the tool head with a large radius is located on the axis of the workpiece to be processed. Use the tool head with a large radius to approach the workpiece to be processed. The workpiece rotates so that the center point of the blade of the tool head with a large radius coincides with the center point of the ball pit of the workpiece to be processed. The tool does not rotate and the first cutting is completed; the second step of processing is to retract the tool and move the tool in the opposite direction, that is, move the tool head with a small radius toward the ball pit in the other direction so that its blade can process the edge of one end of the ball pit. The blade of the tool head with a small radius cuts along the arc of the finished ball pit until the second cutting of the workpiece is completed. The tool is a tool for processing ball pits, comprising a tool handle and a tool head; there are two tool heads, and the blades of the two tool heads are respectively located on the left and right sides of the axis of the tool handle, and the blade radius of one tool head is larger than the blade radius of the other tool head; the blade radius of the tool head with a larger radius is smaller than the radius of the ball pit of the workpiece to be processed, and the blade of the tool head with a larger radius and the blade of the tool head with a smaller radius are located in the same plane; The cutting edge radius of a tool head with a large radius is equal to the radius of the ball pit of the workpiece to be processed minus the finishing allowance.

2. The method for machining a product with a tool according to claim 1, wherein: Retract the tool until it does not touch the workpiece when moving. The cutter head with a small radius moves toward the ball pit at the other end so that its blade can process the edge of one end of the ball pit. The center point of the cutter head with a small radius moves toward the workpiece so that it is flush with the center point of the ball of the workpiece to be processed and continues to move toward the workpiece for the finishing allowance of the workpiece to be processed. Rotate the workpiece and the tool moves in an arc. The radius of the arc moved by the tool is the difference between the radius of the working cutter head and the radius of the ball pit of the workpiece to be processed, until the second cutting of the workpiece is completed.

Images