Double-screw-hole rear sweeping knife

Abstract

The utility model relates to the technical field of alloy material processing, in particular to a double-screw-hole rear sweeping cutter which comprises a cutter bar, the cutter bar comprises a cutter body, a groove is formed in the cutter body, and two threaded holes penetrating through the cutter body are formed in the groove; the blade is installed in the groove and comprises a blade body, tool bits are arranged at the two ends of the blade body respectively, two through holes matched with the threaded holes are formed in the blade body, the two tool bits are symmetrically distributed about the central axis of the blade body, each tool bit is provided with a receding face and a diagonal plane, and a cutting head is formed between the receding face and the diagonal plane; the number of the screws is two, the two screws sequentially penetrate through the through hole and the threaded hole from outside to inside, and the blade is fixed to the cutter bar. The rear sweeping knife is simple in structure, reasonable in design, long in service life, good in stability, high in yield of cut products and worthy of vigorous popularization and application, and the rear sweeping knife can be used on the two sides and is fixed through double screw holes.

Description

A type of double screw hole rear sweeper Technical Field

[0001] This utility model relates to the field of alloy material processing technology, specifically a double screw hole back-sweeping tool. Background Technology

[0002] Turning tools are commonly used on CNC lathes. They are pre-manufactured polygonal inserts with multiple cutting edges, which are mechanically clamped onto the tool body. CNC inserts are a general term for indexable turning inserts and are the mainstream products in modern metal cutting applications. They are mainly used in turning, milling, parting, grooving, and thread turning of metals. Back-sweep tools are one type of turning tool.

[0003] Currently, existing back-swept cutters have complex structures and unreasonable designs, allowing only unilateral use and resulting in short tool life. Furthermore, back-swept cutters typically use single-hole screws for fixing; under heavy cutting conditions, the single-hole screw-fixed insert will vibrate, leading to poor stability and a high defect rate in the cut products. To address this problem, the inventors designed a back-swept cutter with dual screw holes. Summary of the Invention

[0004] The purpose of this utility model is to provide a rear sweeping tool with double screw holes, which has the advantages of simple structure, reasonable design, dual-sided operation, long service life, good stability and high yield of cut products due to the use of double screw holes for fixing, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-screw-hole rear sweeper, comprising: a shank, the shank including a blade, the blade having a groove, and two threaded holes penetrating the blade having two threaded holes in the groove;

[0006] The blade is installed in a groove and includes a blade piece. Both ends of the blade piece are provided with blade heads, and the blade piece has two through holes adapted to the threaded holes. The two blade heads are symmetrically distributed about the central axis of the blade piece. Each blade head is provided with a clearance surface and a beveled surface, and a cutting head is formed between the clearance surface and the beveled surface.

[0007] Two screws are provided, which pass through the through hole and the threaded hole from the outside to the inside to fix the blade to the blade holder.

[0008] Preferably, the groove is composed of an installation groove and a limiting groove, the installation groove and the limiting groove are connected, and an included angle is formed between the installation groove and the limiting groove, the angle value of which is between 110° and 165°.

[0009] Preferably, the limiting groove is located below the mounting groove, and the limiting groove gradually narrows from one end of the mounting groove to the other end.

[0010] Preferably, the cutting head is arc-shaped.

[0011] Preferably, the side of the clearance surface near the cutting edge is recessed to form a guide groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides a rear sweeper with double screw holes. The rear sweeper includes a shank, a blade, and screws. Its overall structure is simple and reasonably designed. The blade includes a cutting disc, and a cutting head is provided at both ends of the cutting disc. When one cutting head is worn, the other cutting head can be replaced, thereby extending the service life of the rear sweeper and making it highly practical.

[0014] 2. The tool holder in this utility model includes a tool body with a groove. Two threaded holes penetrating the tool body are formed in the groove. The blade is fixed in the two threaded holes by two screws. Compared with the traditional single screw fixation, it has better stability. The groove in this utility model is composed of a mounting groove and a limiting groove. The mounting groove and the limiting groove are connected and form an included angle between them. The angle value of the included angle is between 110° and 165°. When installing the blade, the blade tip is installed in the mounting groove, and one of the blade tips is limited by the limiting groove. One side of the blade tip contacts and limits the blade at the included angle formed between the mounting groove and the limiting groove, thereby improving the stability of the blade and thus improving the product processing yield. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 is an exploded view of this utility model;

[0017] Figure 3 is a side view of the blade in Figure 2 of this utility model;

[0018] Figure 4 is an enlarged schematic diagram of the structure at point A in Figure 3 of this utility model;

[0019] Figure 5 is a schematic diagram of the use of this utility model.

[0020] The reference numerals and names in the figure are as follows:

[0021] 1. Blade holder; 11. Blade body; 12. Groove; 121. Mounting groove; 122. Limiting groove; 13. Threaded hole; 2. Blade; 21. Cutting insert; 22. Blade head; 221. Avoidance surface; 222. Beveled surface; 223. Guide groove; 224. Cutting head; 23. Through hole; 3. Screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0025] Please refer to Figures 1 to 4. One embodiment of this utility model provides a double-screw-hole back-sweeping blade, comprising: a blade shank 1, which includes a blade body 11 with a groove 12 and two threaded holes 13 penetrating the blade body 11 within the groove 12; and a blade 2, which is installed within the groove 12 and includes a blade tip 21. Each blade tip 21 has a blade head 22 at both ends, and the blade tip 21 has two through holes 23 that match the threaded holes 13. The two blade heads 22 are symmetrically distributed about the central axis of the blade tip 21. Each blade head 22 has a clearance surface 221 and a chamfered surface 222, forming a cutting surface between the clearance surface 221 and the chamfered surface 222. The head 224; screws 3, two screws 3 are provided, the two screws 3 pass through the through hole 23 and the threaded hole 13 from the outside to the inside, fixing the blade 2 to the blade bar 1. The groove 12 is composed of the mounting groove 121 and the limiting groove 122. The mounting groove 121 and the limiting groove 122 are connected, and an included angle is formed between the mounting groove 121 and the limiting groove 122. The angle value of the included angle is between 110° and 165°. The limiting groove 122 is located below the mounting groove 121, and the limiting groove 122 gradually shrinks from one end of the mounting groove 121 to the other end. The cutting head 224 is arc-shaped, and the side of the clearance surface 221 near the blade 21 is concave to form a guide groove 223.

[0026] Please refer to Figures 1 to 4 again. When the blade 2 is in use, if one of the blade heads 22 at both ends of the blade 21 is worn, the other can be replaced, thereby extending the service life of the back sweeping blade. When installing the blade 2, the blade 21 of the blade 2 is installed in the mounting groove 121. One of the blade heads 22 of the blade 2 is limited by the limiting groove 122, and one side of the blade head 22 contacts the angle formed between the mounting groove 121 and the limiting groove 122, thereby improving the stability of the blade 2 and thus improving the yield of product processing.

[0027] Screw 3 is preferably an M4 screw, replacing the M3.5 screws on the market for fixing. It uses a double-hole screw for fixing, which increases the life by 30% and reduces the defect rate by 15% compared to single-hole screw fixing. The base material is specially formulated, which makes the material more superior and more stable in heavy cutting fields and in difficult-to-machine materials (such as alloy steel).

[0028] Please refer to Figure 5. In this utility model, when the rear sweeper is installed, the cutting head 224 on the cutter head 22 contacts the workpiece 4 during operation to perform cutting. The processed debris is guided and discharged by the guide groove 223 to avoid accumulating at the cutting point and affecting the cutting quality.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-screw-hole rear sweeper, characterized in that, include: A tool holder (1) includes a tool body (11) with a groove (12) and two threaded holes (13) penetrating the tool body (11) within the groove (12); and a blade (2) installed within the groove (12), comprising a cutting edge (21) with cutting heads (22) at both ends and two through holes (23) that are adapted to the threaded holes (13). The two cutting heads (22) are symmetrically distributed around the central axis of the cutting edge (21). Each cutting head (22) is provided with a relief surface (221) and a beveled surface (222). A cutting head (224) is formed between the relief surface (221) and the beveled surface (222). There are two screws (3). The two screws (3) pass through the through hole (23) and the threaded hole (13) from the outside to the inside to fix the blade (2) on the blade shank (1).

2. The double-screw-hole rear sweeper according to claim 1, characterized in that: The groove (12) is composed of an installation groove (121) and a limiting groove (122). The installation groove (121) and the limiting groove (122) are connected, and an included angle is formed between the installation groove (121) and the limiting groove (122). The angle value of the included angle is between 110° and 165°.

3. A double-screw-hole rear sweeper according to claim 1, characterized in that: The limiting groove (122) is located below the mounting groove (121), and the limiting groove (122) gradually shrinks from one end of the mounting groove (121) to the other end.

4. A double-screw-hole rear sweeper according to claim 3, characterized in that: The cutting head (224) is arc-shaped.

5. A double-screw-hole rear sweeper according to claim 1, characterized in that: The side of the clearance surface (221) near the blade (21) is recessed to form a guide groove (223).

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