Machining tool for deep-cavity kidney-shaped groove

Abstract

The utility model provides a machining tool for a deep-cavity kidney-shaped groove. The machining tool is characterized by comprising a tool bit and a thermal shrinkage rod. The tool bit is coaxially mounted at the front end of the thermal shrinkage rod; a through hole for cooling is formed in the thermal shrinkage rod; the tool bit is mounted in a mounting hole preset at the front end of the thermal shrinkage rod; the cross section of the joint of the tool bit and the thermal shrinkage rod is circular or polygonal; the outer diameter of the joint of the thermal shrinkage rod and the tool bit is larger than the diameter of the thermal shrinkage rod. The diameter of the thermal shrinkage rod is phi 12mm, and the outer diameter of the joint of the thermal shrinkage rod and the tool bit is phi 14mm; the tool bit is connected with the thermal shrinkage rod according to the principle of thermal expansion and cold contraction; the tool bit is simple in structure, the tool bit can be rapidly replaced, and the tool bit has a good cooling effect on machining of a deep-cavity kidney-shaped groove.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, and particularly relates to a machining tool for a deep-cavity waist-shaped groove. BACKGROUND

[0002] For a thin-walled ring, the material is titanium alloy, a deep cavity is designed on the machined part, and the waist-shaped groove is located in the deep cavity, and the waist-shaped groove is usually processed by a custom-made lengthened integral carbide milling cutter, and the machining has the following disadvantages: first, the production cost is high, and the cost of the lengthened integral carbide milling cutter is several times that of a conventional cutter; second, due to the influence of the structure and size of the part, the cutter needs to be lengthened, and the overall rigidity of the lengthened cutter is weak, and the cutter is prone to deflection, vibration, and breakage due to the influence of cutting force when machining; third, the waist-shaped groove is small and located in the deep cavity, and the gap between the cutter and the inner wall of the deep cavity of the part is small due to the limitation of the structure of the part, and the external cooling effect is affected during the machining process, iron filings are accumulated, heat generated during cutting is not easy to discharge, and the cutter and the part are prone to damage, so that the size precision of the hole of the part cannot meet the design requirements. SUMMARY

[0003] In view of the above problems, the utility model aims to provide a machining tool which can solve the cooling problem, reduce the possibility of cutter breakage, and meet the requirements of the machining process.

[0004] The utility model is implemented by the following technical solutions:

[0005] A machining tool for a deep-cavity waist-shaped groove, characterized by comprising a cutter head and a heat-shrinkable rod; the cutter head is coaxially installed at the front end of the heat-shrinkable rod; the heat-shrinkable rod is internally provided with a through hole for cooling; the cutter head is installed in a preset mounting hole at the front end of the heat-shrinkable rod; the cross section of the connection between the cutter head and the heat-shrinkable rod is circular or polygonal; the outer diameter of the connection between the heat-shrinkable rod and the cutter head is greater than the diameter of the heat-shrinkable rod; the diameter of the heat-shrinkable rod is φ12 mm, and the outer diameter of the connection between the heat-shrinkable rod and the cutter head is φ14 mm; the cutter head and the heat-shrinkable rod are connected through the principle of thermal expansion and cold shrinkage.

[0006] The utility model has the advantages of:

[0007] The utility model has the advantages of: BRIEF DESCRIPTION OF DRAWINGS

[0008] The utility model will be further described in detail below with reference to the drawings.

[0009] Figure 1 It is the front view of the utility model.

[0010] Figure 2 This is a schematic diagram of the working process of this utility model.

[0011] As shown in the figure: 1-cutting head; 2-heat shrink bar; through hole-21; 3-part. Detailed Implementation

[0012] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0013] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0014] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0015] like Figure 1 , Figure 2 The tool shown is for machining deep cavity waist-shaped grooves and includes: a tool head 1 and a heat shrink bar 2.

[0016] The cutting head 1 is installed at the front end of the heat shrink rod 2; the cutting head 1 is installed in a pre-set mounting hole at the front end of the heat shrink rod 2; in order to reduce the cost of machining tools and to facilitate quick tool replacement, the cutting head 1 and the heat shrink rod 2 are connected by the principle of thermal expansion and contraction. The front end of the heat shrink rod 2 is heated, and the front end of the heat shrink rod 2 expands due to heat, allowing the cutting head 1 to be inserted. After cooling, the tool is clamped; the head is heated, and the head expands due to heat, allowing the tool to be removed, thus completing the tool removal; the cross-section of the connection between the cutting head 1 and the heat shrink rod 2 is circular or polygonal.

[0017] To ensure tool life and product quality, an internal cooling design is adopted. The heat shrink rod 2 has a through hole 21 for cooling, which can avoid insufficient cooling due to the component structure. To ensure the strength of the connection between the heat shrink rod and the tool, the connection point is reinforced. The diameter of the connection between the heat shrink rod 2 and the tool head 1 is larger than the diameter of the heat shrink rod 2. The diameter of the heat shrink rod 2 is φ12mm, and the diameter of the connection between the heat shrink rod 2 and the tool head 1 is φ14mm.

[0018] Working principle:

[0019] After the cutting head 1 is installed on the heat shrink bar 2, it is installed behind the machine tool spindle to perform waist-shaped groove machining on part 3.

[0020] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A cutting tool for machining deep cavity waist-shaped grooves, characterized in that: It includes a cutting head (1) and a heat shrink rod (2); the cutting head (1) is coaxially mounted on the front end of the heat shrink rod (2), and the cutting head (1) is installed in a preset mounting hole at the front end of the heat shrink rod (2). The cutting head (1) and the heat shrink rod (2) are connected by the principle of thermal expansion and contraction; the heat shrink rod (2) is provided with a through hole (21) for cooling; the cross-section of the connection between the cutting head (1) and the heat shrink rod (2) is circular or polygonal; the outer diameter of the connection between the heat shrink rod (2) and the cutting head (1) is larger than the diameter of the heat shrink rod (2).

2. The machining tool for deep cavity waist-shaped grooves according to claim 1, characterized in that: The heat shrink rod (2) has a diameter of φ12mm, and the outer diameter of the connection between the heat shrink rod (2) and the cutter head (1) is φ14mm.

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