Reverse cutting tool

Abstract

The utility model discloses a reverse cutting cutter, which comprises a cutter body, a plurality of blade grooves, a plurality of cutter blades and a plurality of cutter blades, the cutter body is provided with a clamping part which is rotationally symmetrical about a rotating shaft, a plurality of blade grooves used for clamping blade blades are arranged on the peripheral side of the clamping part at intervals in the circumferential direction, and the blade grooves are arranged on the inner end side of the clamping part and extend from the peripheral side of the clamping part to the direction of the rotating shaft; and the blade is mounted in the blade groove and is provided with a curved cutting edge which at least partially protrudes relative to the outer surface of the clamping part. The reverse cutting tool is wide in machining range and easy and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the field of machining tools, in particular to a reverse cutting tool. Background Art

[0002] In the field of mechanical processing, forward processing dominates routine tasks with its high efficiency, high quality and fast speed. However, when faced with products with special requirements, such as frequent changes in clamping surfaces, pursuit of extreme precision, workpieces with opposite directions of processing surfaces but requiring consistent positioning references, and workpieces that are difficult to flip directly, reverse processing technology has shown its unique advantages. Although reverse processing is particularly applicable in specific situations, its application scenarios are relatively limited, and it still faces challenges in terms of flexibility of processing stroke, stability of product quality and improvement of work efficiency.

[0003] Patent CN219818155U proposes an innovative T-type reverse milling cutter, which adopts an integrated solid hard design and effectively meets the basic needs of reverse cutting. However, its limitations are that the overall size is compact, which limits the expansion of the processing range, and the cost of solid hard cutters is higher than other types of cutters.

[0004] Another patent, CN215238311U, introduces the concept of a modular reverse scraper. This design achieves structural flexibility through the combination of a modular blade body and a handle, supplemented by a key block connection and locking mechanism. However, at the same time, the multi-component assembly process not only increases the risk of assembly errors, but also increases production complexity and overall costs, and places higher demands on production efficiency and cost control. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a reverse cutting tool with a wide processing range and easy use.

[0006] The present application provides a reverse cutting tool, comprising:

[0007] The blade body has a clamping portion rotationally symmetrical about the rotation axis, and a plurality of blade grooves for clamping blades are arranged at intervals on the outer circumference of the clamping portion. The blade grooves are arranged on the inner end side of the clamping portion and extend from the outer circumference of the clamping portion toward the rotation axis.

[0008] The blade is installed in the blade groove and has a curved cutting edge which at least partially protrudes relative to the outer surface of the clamping part.

[0009] Specifically, the blade is an indexable willow-leaf-shaped blade having a plurality of curved cutting edges.

[0010] Specifically, the willow-leaf-shaped blade has two curved cutting edges, and the two curved cutting edges are symmetrical about the center.

[0011] Furthermore, the clamping portion is starfish-shaped, having a plurality of protrusions extending outwardly and evenly arranged circumferentially, and the blade slot is at least partially disposed on the protrusions.

[0012] Furthermore, a plurality of chip removal grooves are limitedly formed between the plurality of protrusions, the chip removal grooves are communicated with the insert grooves, and penetrate front to back in the direction of the rotation axis.

[0013] Specifically, there are six protrusions in total, and six chip removal grooves are formed.

[0014] Furthermore, the knife body also has a handle and a hollow portion recessed relative to the handle, and the hollow portion is arranged between the handle and the clamping portion.

[0015] Specifically, the handle, the hollow portion and the clamping portion are integrally formed.

[0016] Specifically, there is a height difference H between the handle and the empty portion, 5mm>H≥0.5mm.

[0017] Specifically, the protruding height of the curved cutting edge relative to the outer surface of the clamping portion is L, 2mm>L≥0.5mm.

[0018] The improvement of the present application brings the following advantages: the blade groove of a reverse cutting tool in the embodiment of the present application is set on the inner end side rather than the outer end side. This reverse setting makes it possible to directly perform reverse cutting while ensuring the uniform positioning reference without turning the workpiece during cutting, thereby improving product quality while ensuring processing efficiency. In addition, the blade of the present embodiment has a curved cutting edge, which can disperse the cutting force, extend the life of the blade, and provide different main rake angles to adapt to various processing requirements, thereby enhancing the applicability of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a reverse cutting tool according to an embodiment of the present application;

[0020] Figure 2 A schematic side view of a reverse cutting tool according to an embodiment of the present application;

[0021] Figure 3 for Figure 2 Enlarged view of point E in the middle;

[0022] Figure 4 Another side view schematic diagram of the structure of a reverse cutting tool according to an embodiment of the present application;

[0023] Among them, 1. tool; 2. tool body; 3. blade; 4. blade groove; 5. chip groove; 6. curved cutting edge; 7. protrusion; 21. handle; 22. empty part; 23. clamping part; 24. outer peripheral side; 25. inner end side. DETAILED DESCRIPTION

[0024] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0025] See also Figure 1-4 In an embodiment of the present application, a reverse cutting tool 1 comprises a tool body 2 and a plurality of blades 3.

[0026] The blade body 2 has a handle 21, a recessed portion 22 that is recessed relative to the handle 21, and a flat clamping portion 23 in sequence, and the clamping portion 23 is rotationally symmetrical about a rotation axis A. A plurality of blade slots 4 for clamping blades 3 are evenly arranged on the outer peripheral side 24 of the clamping portion 23 in the circumferential direction, and these blade slots 4 are arranged on the inner end side 25 of the clamping portion 23 and extend from the outer peripheral side 24 of the clamping portion 23 toward the rotation axis A. Here, the outer peripheral side 24 of the clamping portion 23 is an end side relatively far from the rotation axis A, and the inner end side 25 is an end side close to the handle 21 and the recessed portion 22.

[0027] The blade 3 is installed in the blade groove 4 and has a curved cutting edge 6 that protrudes from the outer surface of the clamping portion 23. Figure 3 In order to more clearly show the relative distance between the curved cutting edge 6 and the outer surface of the clamping portion 23, Figure 3 There is no blade installed in the blade slot 4. Figure 3 The curved cutting edge 6 is for illustration only.

[0028] The blade slot 4 of this embodiment is arranged on the inner end side 25 instead of the outer end side (the side away from the handle 21 and the empty portion 22). This reverse setting makes it possible to directly perform reverse cutting while ensuring the uniform positioning reference without turning the workpiece during cutting, thereby ensuring processing efficiency and improving product quality. In addition, the blade 3 of this embodiment has a curved cutting edge 6, which can disperse the cutting force, extend the blade life, and provide different main deflection angles to adapt to various processing requirements, thereby enhancing the applicability of processing.

[0029] like Figure 1As shown, as an embodiment, the blade 3 is an indexable willow-leaf-shaped blade having a plurality of curved cutting edges 6. In reverse processing, the quality of the product processed by the curved surface is often difficult to guarantee, and the tool is easily damaged. The indexable willow-leaf-shaped blade has two switchable curved cutting edges 6, which are easy to switch, simple to install, and relatively low in cost, and is particularly suitable for such processing scenarios. The two curved cutting edges 6 are centrally symmetrical, and their shape is approximately a circular arc or a straight line segment connected to a circular arc.

[0030] like Figure 4 As shown, the clamping portion 23 is flat, rotationally symmetrical starfish-shaped, but the number of its arms is not limited, such as two, three, five, etc. The clamping portion 23 has a plurality of protrusions 7 (similar to the arms of a starfish) extending outward and evenly arranged circumferentially, and all or most of the blade slots 4 are arranged on these protrusions 7. As a specific example, a plurality of chip grooves 5 are limitedly formed between the plurality of protrusions 7, that is, on the outer peripheral side 24 of the clamping portion 23, the protrusions 7 and the chip grooves 5 are arranged circumferentially at intervals. The chip groove 5 is connected to the blade groove 4 and passes through it front and back in the direction of the rotation axis A. Due to working condition limitations, the working area of ​​reverse cutting is often relatively narrow, and sufficient chip removal space is conducive to the discharge of chips, thereby ensuring the normal operation of the tool. In this example, a total of six protrusions 7 and six corresponding chip grooves 5 are provided.

[0031] As an embodiment, the handle 21, the hollow portion 22 and the clamping portion 23 are integrally formed. This structure does not require additional installation, has high stability and reliability, reduces the assembly process between multiple components, thereby reducing assembly errors and greatly improving the accuracy and quality of the product.

[0032] like Figure 2 As shown, the hollow portion 22 is steppedly recessed relative to the shank 21, and there is a height difference H between the shank 21 and the hollow portion 22, where 5mm>H≥0.5mm. Setting a suitable height difference H can increase the maximum machining limit of the reverse machining, and at the same time provide a buffer space between the workpiece and the tool to prevent small chips from entering and accumulating, thereby affecting the machining effect.

[0033] like Figure 3 As shown, the protruding height of the curved cutting edge 6 relative to the outer surface of the clamping portion 23 is L, where 2mm>L≥0.5mm. This design provides an effective clearance distance L, providing sufficient space for chips, thereby improving the stability of processing. As the curved cutting edge 6 extends, the distance L can be a fixed value or a variable value, but the maximum and minimum values ​​of L must meet the above range.

[0034] In addition, the handle 21 and / or the hollow portion 22 may be columnar, such as cylindrical, relatively elongated cuboid or other polygonal shapes, etc. Meanwhile, the handle 21 , the hollow portion 22 and the clamping portion 23 are all rotationally symmetrical about the same rotation axis A.

[0035] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A reverse cutting tool, characterized in that: include: The blade body has a clamping portion rotationally symmetrical about the rotation axis, and a plurality of blade grooves for clamping blades are arranged at intervals on the outer circumference of the clamping portion. The blade grooves are arranged on the inner end side of the clamping portion and extend from the outer circumference of the clamping portion toward the rotation axis. The blade is installed in the blade groove and has a curved cutting edge which at least partially protrudes relative to the outer surface of the clamping part.

2. The tool according to claim 1, characterized in that The blade is an indexable willow-leaf blade having a plurality of curved cutting edges.

3. The tool according to claim 2, characterized in that The willow-leaf-shaped blade has two curved cutting edges, and the two curved cutting edges are symmetrical in center.

4. The tool according to any one of claims 1 to 3, characterized in that: The clamping portion is starfish-shaped and has a plurality of protrusions extending outward and evenly arranged circumferentially, and the blade slot is at least partially arranged on the protrusions.

5. The tool according to claim 4, characterized in that A plurality of chip removal grooves are defined and formed between the plurality of protrusions. The chip removal grooves are communicated with the insert grooves and penetrate front and rear in the direction of the rotation axis.

6. The tool according to claim 5, characterized in that There are six protrusions in total, and six chip discharge grooves are formed.

7. The tool according to any one of claims 1 to 3, characterized in that: The knife body also has a handle and a hollow portion recessed relative to the handle, wherein the hollow portion is arranged between the handle and the clamping portion.

8. The tool according to claim 7, characterized in that The handle, the hollow portion and the clamping portion are integrally formed.

9. The tool according to claim 7, characterized in that There is a height difference H between the handle and the empty portion, 5mm>H≥0.5mm.

10. The tool according to any one of claims 1 to 3, characterized in that: The protruding height of the curved cutting edge relative to the outer surface of the clamping portion is L, 2mm>L≥0.5mm.

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