Efficient inner-cooling drill for machining inner hole of cylinder body

Abstract

An efficient inner-cooling drill for machining an inner hole of a cylinder body comprises a cutter handle, a neck part and a cutter head which are sequentially connected. The tool bit comprises an end forming blade and a main body section, and the forming blade comprises a plurality of forming sections which are connected in sequence. A plurality of groups of forming sections are arranged on the forming blade at the end part of the tool bit of the inner-cooling drill, so that during hole machining, chip separation machining, namely step-by-step drilling, can be carried out, the cutting resistance of a cutting edge of a tool is better reduced, the abrasion of the inner-cooling drill is reduced, the service life is prolonged, and the hole machining precision is ensured.

Description

Technical Field

[0001] The utility model relates to the field of hardware processing tools, in particular to a high-efficiency internal cooling drill for processing inner holes of a cylinder body. Background Art

[0002] When machining the inner hole of the QT500 cylinder body, an internal coolant drill is required. However, the existing internal coolant drill has great shortcomings during use: the chips continuously generated during the cutting process cannot be discharged in time, which aggravates the wear of the forming edge of the internal coolant drill, making the internal coolant drill not only have poor cutting efficiency but also short service life; in addition, the wear of the forming edge cannot guarantee the quality accuracy of the machining hole of the cylinder body, thus greatly reducing the product yield. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide a high-efficiency internal coolant drill for machining inner holes in a cylinder body, which solves the problems existing in the use of existing internal coolant drills.

[0004] Technical solution: The utility model provides a high-efficiency internal cold drill for processing the inner hole of a cylinder body, comprising a cutter head, a neck, and a shank connected in sequence; the cutter head comprises an end forming blade and a main body section, and the forming blade comprises a plurality of forming sections connected in sequence. A plurality of forming sections are arranged on the end forming blade of the cutter head of the internal cold drill, so that chip separation processing can be performed when processing the hole, that is, drilling is performed step by step, thereby reducing the cutting resistance of the tool edge, not only reducing the wear of the internal cold drill, increasing the service life, but also ensuring the hole processing accuracy.

[0005] Furthermore, the slope of the forming section is different, and gradually decreases from the tip of the cutter head to the neck along the axis. The different slopes of the forming section make the chip force and cutting amount on the cylinder body gradually change at different positions, thereby greatly reducing the wear of the internal coolant drill, reducing the loss, and improving the quality of the processed hole.

[0006] Furthermore, the outer surface of the forming section of the forming blade connected to the main body section is passivated.

[0007] Furthermore, the outer surface of the connection between the main body section and the forming blade is passivated, thereby effectively improving the life of the internal cold drill and the quality of the processed hole.

[0008] Furthermore, the cutter head body is provided with a plurality of blade backs and an inclined groove formed by the adjacent blade backs. The inclined groove is provided to facilitate the discharge of chips when drilling with an internal coolant drill.

[0009] Furthermore, the end of the cutter head is provided with double edges, which provide better support and centering strength when drilling with internal cooling drill, thereby improving the position accuracy and surface finish of the processed hole.

[0010] Furthermore, the neck diameter is smaller than the cutter head body diameter. The neck diameter is smaller than the cutter head body diameter, which is not only conducive to chip removal, reduces chip accumulation, facilitates tool heat dissipation, protects the toughness of the blade, but also facilitates processing in the depth direction of large overhang working conditions, expanding the application range of the tool.

[0011] Furthermore, it also includes a cooling hole, which runs through the tool handle to the tool head, so as to cool and remove chips when the internal coolant drill is working.

[0012] It can be seen from the above technical scheme that the utility model has the following beneficial effects: 1) The forming edge at the end of the cutter head is provided with multiple groups of forming segments with different inclinations, so that chip splitting processing can be performed during hole processing, thereby performing rapid chip removal, which not only improves the overall processing efficiency and cutting quality of the internal coolant drill, but also effectively reduces the cutting resistance of the tool edge, reduces its wear, and increases its service life; 2) The necking setting of the internal coolant drill is not only conducive to chip removal, reduces chip accumulation, facilitates tool heat dissipation, and protects the toughness of the blade, but also facilitates processing in the depth direction of large overhang conditions, thereby expanding the application range of the tool; 3) The end of the cutter head is provided with double edges, which plays a better supporting and centering role during drilling, improves the quality of the processed holes, and improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the utility model;

[0014] Figure 2 for Figure 1 An enlarged view of the partial view A in FIG.

[0015] Figure 3 It is a left view of the utility model.

[0016] In the figure: a cutter head 1, a first forming section 11, a second forming section 12, a third forming section 13, a fourth forming section 14, a blade back 15, an inclined groove 16, a first edge 17 and a second edge 18, a neck 2, a tool handle 3, and a cooling hole 4. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-3 And specific embodiments are provided to further illustrate the utility model.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0019] Embodiment 1

[0020] like Figure 1 The figure shows the front view of the utility model, which includes a cutter head 1, a neck 2, and a handle 3 connected in sequence; the cutter head 1 includes an end forming blade and a main body section, and the forming blade includes a plurality of forming sections connected in sequence. A plurality of forming sections are arranged on the end forming blade of the cutter head 3 of the internal cold drill, so that chip separation can be performed during hole processing, that is, step-by-step drilling can be performed, thereby effectively reducing the cutting resistance of the tool edge, not only reducing the wear of the internal cold drill, increasing the service life, but also ensuring the hole processing accuracy.

[0021] The slopes of the forming sections are different, and gradually decrease from the tip of the cutter head 3 to the neck 2 along the axis. The different slopes of the forming sections make the chip force and cutting amount of the cylinder body gradually change at different positions, thereby greatly reducing the wear of the internal cold drill, reducing the loss, and improving the quality of the processed hole. In this embodiment, there are four forming sections, such as Figure 2 The figure shows a partial enlarged view of the forming section A, which are the first forming section 11, the second forming section 12, the third forming section 13, and the fourth forming section 14. The slopes of the first forming section 11, the second forming section 12, the third forming section 13, and the fourth forming section 14 gradually decrease from the tip of the cutter head 3 to the neck 2 along the axis.

[0022] The outer surface of the forming section of the forming blade connected to the main body section is passivated.

[0023] The outer surface of the connection between the main body section and the forming edge is passivated. In this embodiment, the outer surface of the fourth forming section 14 and the outer surface of the connection between the main body section and the fourth forming section 14 are passivated.

[0024] The main body of the cutter head 1 is provided with a plurality of blade backs 15 and an inclined groove 16 formed by adjacent blade backs 15 .

[0025] The end of the blade 1 is provided with double edges. Figure 3 The left side view of this embodiment is shown, on which a first edge 17 and a second edge 18 are provided. In this embodiment, the first edge 17 and the second edge 18 are located on the blade back 15, and the angle between the first edge 17 and the second edge 18 is 48°.

[0026] The diameter of the neck 2 is smaller than the diameter of the main body of the cutter head 1 .

[0027] It also includes a cooling hole 4, which passes through the tool head 1 from the tool handle 3. Figure 3 As shown, in this embodiment, there are two cooling holes 4 located at the ends of the blade back 15 .

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A high-efficiency internal coolant drill for machining inner holes of a cylinder body, characterized in that: It comprises a cutter head (1), a neck (2), and a cutter handle (3) which are connected in sequence; the cutter head (1) comprises an end profiled blade and a main body section, and the profiled blade comprises a plurality of profiled sections connected in sequence.

2. The high-efficiency internal cooling drill for machining inner holes of a cylinder body according to claim 1, characterized in that: The inclinations of the forming sections are different, and gradually decrease along the axis from the tip of the cutter head (1) toward the neck (2).

3. The high-efficiency internal cooling drill for machining inner holes of a cylinder body according to claim 2, characterized in that: The outer surface of the forming section where the forming blade is connected to the main section is passivated.

4. The high-efficiency internal cooling drill for machining inner holes of a cylinder body according to claim 3, characterized in that: The outer surface of the connection between the main body section and the forming edge is passivated.

5. The high-efficiency internal cooling drill for machining inner holes of a cylinder body according to claim 1, characterized in that: The blade head (1) body is provided with a plurality of blade backs (15) and an inclined groove (16) formed by adjacent blade backs (15).

6. The high-efficiency internal cooling drill for machining inner holes of a cylinder body according to claim 5, characterized in that: The end of the cutter head (1) is provided with double edges.

7. The high-efficiency internal coolant drill for machining inner holes of a cylinder body according to claim 1, characterized in that: The diameter of the neck (2) is smaller than the diameter of the main body of the cutter head (1).

8. The high-efficiency internal cooling drill for machining inner holes of a cylinder body according to claim 1, characterized in that: It also comprises a cooling hole (4), wherein the cooling hole (4) passes through the tool head (1) from the tool handle (3).

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