A lever-type high-precision broaching tool

Abstract

The utility model discloses a lever type high accuracy broaching tool belongs to mechanical technical field. It includes broach body, and the broach body is strip -shaped, and the central position of broach body is provided with a cylindrical pinhole, and the direction of pinhole is consistent with the width direction of broach body, and the one end of broach body is the part of tool bit, and the top end of tool bit part is the cutting edge, and the side of tool bit part near the body of broach body is provided with an arc chip pocket, and the other end of broach body is equipped with a gap -like positioning groove, and the positioning groove is horizontally arranged, and in the above of positioning groove, the vertical direction positioning hole is provided in the broach body, and the positioning hole is located the intermediate position of this end of broach body, and the broach body is two, and two broach bodies are installed on the broaching tool head device through respective pinhole, and two broach bodies are 180 degree symmetrical arrangement. The utility model can guarantee the consistency of each processing size of part, and satisfies the precision requirement of part size.

Description

Technical Field

[0001] This utility model relates to a lever-type high-precision broaching tool, belonging to the field of mechanical technology. Background Technology

[0002] In internal broaching, the material and design of the broach are crucial. A high-efficiency broach can withstand high-speed cutting and large cutting forces, ensuring the machining effect and quality of internal broaching. The machining principle involves using the broach under tension to cut the inner hole of the part through its cutting teeth. The broach is pulled from one end of the inner hole to the other, and one or more strokes can complete the roughing to finishing process, removing the pre-machined keyway dimensions to obtain the required size, shape, and surface quality.

[0003] This tool breaks away from the traditional single broaching method. Under the combined effect of the above factors, the machining marks of the keyway in the inner hole of the part are gradually removed and finished.

[0004] Currently, the square cutters used in the past often result in broken chips during broaching, making it impossible to guarantee dimensional accuracy. Moreover, the chip layers vary in thickness, which seriously affects the physical accuracy of internal hole parts and impacts the product production cycle. This places new demands on the cutting tools used in its machining process. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a lever-type high-precision broaching tool, which makes the machining of parts simple and fast, can ensure the consistency of the machining dimensions of the parts, and meet the accuracy requirements of the parts dimensions.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a lever-type high-precision broaching tool, including a broach body, the broach body is strip-shaped, a cylindrical pin hole is provided at the center of the broach body, the orientation of the pin hole is consistent with the width direction of the broach body; one end of the broach body is a cutting head part, the top of the cutting head part is a cutting edge, and an arc-shaped chip groove is provided on the side of the cutting head part near the cutting body of the broach body.

[0007] Furthermore, a slit-shaped positioning groove is provided at the other end of the broach body, and the positioning groove is arranged horizontally; above the positioning groove, a vertical positioning hole is provided in the broach body, and the positioning hole is located at the middle position of this end of the broach body.

[0008] Furthermore, there are two broach bodies in total, which are mounted on the broaching tool head device through their respective pin holes, and the two broach bodies are arranged symmetrically at 180°.

[0009] The beneficial effects of this utility model are: it can ensure the consistency of the various processing dimensions of the parts and meet the accuracy requirements of the parts dimensions; it meets both the process requirements and the production requirements of mass production, with high production efficiency, no safety hazards, low manufacturing difficulty, strong operability, and improved production efficiency; it has now been successfully applied to the broaching of the inner wall of a certain product cylinder. The broaching tool has been verified in practice to improve production efficiency by several times compared with traditional processing methods, greatly increasing the economic benefits of enterprises. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 yes Figure 1 The right view.

[0013] Figure 3 yes Figure 1 Top view.

[0014] Figure 4 yes Figure 3 A-A direction diagram.

[0015] Numbering on the map:

[0016] 1. Broach body, 2. Chip groove, 3. Positioning hole, 4. Positioning groove, 5. Pin hole, 6. Broach head, 7. Cutting edge. Detailed Implementation

[0017] like Figure 1 As shown in Figure 4, a lever-type high-precision broaching tool includes a broach body 1, which is strip-shaped. A cylindrical pin hole 5 is provided at the center of the broach body 1, and the orientation of the pin hole 5 is consistent with the width direction of the broach body 1. One end of the broach body 1 is a cutting head portion 6, and the top of the cutting head portion 6 is a cutting edge 7. An arc-shaped chip groove is provided on the side of the cutting head portion 6 near the cutting body of the broach body 1.

[0018] The other end of the broach body 1 is provided with a slit-shaped positioning groove 4, which is arranged horizontally; above the positioning groove 4, the broach body 1 is provided with a vertical positioning hole 3, which is located at the middle position of this end of the broach body 1.

[0019] There are two broach bodies 1. The two broach bodies 1 are installed on the broaching tool head device through their respective pin holes 5. The two broach bodies 1 are arranged symmetrically at 180°.

[0020] During use, the two broach bodies 1 are fixedly installed with the shaft hole of the broaching tool head device through the pin hole 5. The two broach bodies 1 form a set of broaching tools, and the two broach bodies 1 are arranged symmetrically at 180°. The broaching tool head device drives the broaching tool to slide directly in the inner hole of the part through the core rod. The broaching tool rotates along the circumference of the inner hole to ensure that the broaching dimensions are met and the accuracy requirements of the product part dimensions are met. During processing, the cutting edge 7 of the cutter head 6 contacts the inner hole wall, and the broaching tool head device sprays oil directly onto the cutter head part 6, which directly pushes the iron chips out into the chip groove 2. The iron chips can curl freely when flowing out, and the broaching resistance is small. The positioning hole 3 and the positioning groove 4 are used to adjust the gap between the broach bodies 1 and the height deviation between the broach bodies 1.

[0021] This broaching tool uses a lever-type broaching method to improve the surface quality of the variable depth groove in the inner hole of the part. Different sizes of broaching tools are used for parts of different diameters to achieve the broaching effect, making the part processing simple and fast, and ensuring the consistency of the various processed dimensions of the part.

Claims

1. A lever-type high-precision broaching tool, characterized in that: The broach body (1) is strip-shaped and has a cylindrical pin hole (5) at the center. The orientation of the pin hole (5) is consistent with the width direction of the broach body (1). One end of the broach body (1) is a cutting head (6), and the top of the cutting head (6) is a cutting edge (7). An arc-shaped chip groove (2) is provided on the side of the cutting head (6) near the blade of the broach body (1).

2. The lever-type high-precision broaching tool according to claim 1, characterized in that: The other end of the broach body (1) is provided with a slit-shaped positioning groove (4), which is arranged horizontally; above the positioning groove (4), a vertical positioning hole (3) is provided in the broach body (1), which is located at the middle position of this end of the broach body (1).

3. The lever-type high-precision broaching tool according to claim 1, characterized in that: There are two broach bodies (1). The two broach bodies (1) are installed on the broaching tool head device through their respective pin holes (5). The two broach bodies (1) are arranged symmetrically at 180°.

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