Hole chamfering C-shaped cutter

Abstract

The utility model relates to the technical field of cutting blades, and provides a hole chamfering C-shaped cutter which aims at solving the problems that an existing hole chamfering C-shaped blade is large in cutting resistance, poor in curling and cutting effect, prone to abrasion and tipping and the like, and comprises a blade body, a plurality of arc chip grooves with the diameter ranging from R1 mm to 1.5 mm are formed in the surface of the blade body, and a plurality of arc chip grooves with the diameter ranging from R1 mm to R2 mm are formed in the surface of the blade body. The edge, close to the outer side of the blade, of the arc chip groove is provided with an arc blunt with the R ranging from 0.02 mm to 0.06 mm. And a cutting relief angle of 6 + / -1 degrees is arranged on the side wall of the blade. According to the hole chamfering C-shaped cutter, the arc chip discharging groove can facilitate smooth chip rolling and discharging and reduce cutting resistance, the arc chamfering can enhance the abrasion resistance of the cutting edge, and the rear angle eliminates the problem that a machined workpiece bounces due to cutting vibration, so that the service life of the cutter is prolonged on the whole; according to the hole chamfering C-shaped cutter, the surface of a machined chamfer is smooth and free of vibration marks, the roundness of the circular face of the chamfer is accurate, and the machining performance of the chamfer is good.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting blades, and more specifically, to a hole chamfering C-type tool. Background Art

[0002] A hole chamfering blade generally refers to a cutting tool used in machining, which can accurately cut the required chamfer shape and can be used for machining various metal or alloy materials. For example, the patent with the publication number CN217254352U provides a boring and chamfering combined tool, which includes a tool shank, a connecting rod, a chamfering ring and a boring head. One end of the tool shank is used to connect to the spindle of the machine tool; one end of the connecting rod is connected to the other end of the tool shank, the chamfering ring is fixedly sleeved outside the connecting rod, and a chamfering blade is installed on the chamfering ring.

[0003] Among them, in order to facilitate precise edge cutting treatment of the hole edge, the tool tip can be set to a C-shaped structure, which is more convenient for machining hole chamfers and fillets, etc. Due to the unique structural characteristics of the C-shaped blade, it can maintain good stability and cutting effect during the cutting process, and the notch design of the blade can also ensure smoothness and precision during cutting.

[0004] However, as a cutting tool, the existing hole chamfering C-type tool still has the following problems in actual use: the blade is always prone to wear, chipping, etc., resulting in a short service life, and large cutting resistance and poor chip curling effect during use. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems of large cutting resistance, poor chip curling effect, easy wear and chipping of the existing hole chamfering C-type blade. The present application provides a hole chamfering C-type tool. The arc chip removal groove can facilitate smooth chip curling and chip removal, reduce the cutting resistance. The arc rounding can enhance the wear resistance of the cutting edge. The relief angle eliminates the problem that the machined workpiece rebounds due to cutting vibration, thereby improving the service life of the tool as a whole. And through experiments, it is proved that the chamfered surface processed by this hole chamfering C-type tool is smooth without vibration marks, and the roundness of the chamfered circular surface is accurate, that is, the chamfering machining performance is good.

[0006] The utility model is realized through the following technical solutions:

[0007] A hole chamfering C-type tool includes a blade, and a plurality of arc chip removal grooves are arranged on the surface of the blade. The arc chip removal grooves are provided with arc rounding near the outer edge of the blade; a cutting relief angle is arranged on the side wall of the blade.

[0008] Preferably, the opening transverse diameter of the arc chip removal groove is 1-1.5 mm, and most preferably 1.2 mm.

[0009] Preferably, the transverse diameter of the opening of the arc blunt is 0.02-0.06 mm, most preferably 0.04 mm.

[0010] Preferably, the cutting clearance angle is 6±1 degrees.

[0011] Preferably, it also includes a chamfering cutter body, the blade is penetrated by at least one shaft bolt, the shaft bolt is arranged along the blade surface toward the bottom surface of the blade, and the end of the shaft bolt close to the bottom surface of the blade is detachably connected to the chamfering cutter body.

[0012] Preferably, the chamfering cutter body is provided with a connecting rod, the connecting rod is recessed with a chamfered surface, and the blade is arranged on the chamfered surface through the shaft bolt.

[0013] The technical solution of the utility model has the following beneficial effects:

[0014] This new C-shaped hole chamfering tool features improvements to the blade structure. The arc-shaped chip flutes facilitate smooth chip removal and reduce cutting resistance. Arc-shaped blunting is also provided on the sides of the chip flutes to enhance the wear resistance of the cutting edge, thereby increasing the tool's service life. A relief angle is also provided on the side of the blade near the chip flutes, ensuring smooth cutting and eliminating cutting vibrations that can cause the workpiece to bounce. Tests have shown that this C-shaped hole chamfering tool produces a smooth, chatter-free chamfered surface with precise roundness, demonstrating excellent chamfering performance and a long blade service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of the blade in Example 1 from a first perspective;

[0017] Figure 2 This is a schematic structural diagram of the blade in Example 1 from a second perspective;

[0018] Figure 3 This is a schematic structural diagram of the blade in Example 1 from a third perspective;

[0019] Figure 4 This is a schematic structural diagram of the blade in Example 1 from a fourth viewing angle;

[0020] Figure 5 This is a schematic structural diagram of the hole chamfering C-type tool in Example 1.

[0021] Icon: 1 - blade, 11 - arc chip groove, 12 - arc chamfering, 13 - cutting clearance angle, 14 - bolt, 2 - chamfering tool body, 21 - connecting rod, 22 - chamfering surface. Specific embodiments

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] Embodiment 1

[0026] As Figures 1 to 5 shown, this embodiment provides a hole chamfering C-type tool, including a chamfering tool body 2 and a blade 1. Two bolts 14 are centrally penetrated through the blade 1. The bolts 14 are arranged along the surface of the blade 1 towards the bottom surface of the blade 1. One end of the bolt 14 close to the bottom surface of the blade 1 is screwed to the chamfering tool body 2; and the chamfering tool body 2 is configured with a connecting rod 21, and the connecting rod 21 is recessed with a chamfering surface 22. The blade 1 is arranged on the chamfering surface 22 through the bolt 14.

[0027] In this embodiment, the blade 1 is set to have a rhomboid-rectangular surface and a trapezoid-inverted cross-section. A pair of arc chip grooves 11 with an opening transverse diameter of R1.2 mm are arranged on the surface of the blade 1, and the pair of arc chip grooves 11 are respectively arranged on both sides of the surface of the blade 1, facilitating smooth chip curling and chip evacuation and reducing cutting resistance; an arc chamfering 12 with an opening transverse diameter of R0.04 mm is arranged at the edge of the arc chip groove 11 close to the outer side of the blade 1, which can enhance the wear resistance of the cutting edge and thus improve the service life of the tool; a cutting clearance angle 13 of 6° is arranged on the side wall of the blade 1, making the cutting light and eliminating the springback of the workpiece being machined caused by cutting vibration. Among them, those skilled in the art can adjust parameters such as the dimensions and angles of the above structures according to actual usage requirements, etc., to better balance the cutting effect and the service life of the blade.

[0028] During use, the blade 1 is installed on the chamfering surface 22 of the chamfering tool body 2 by means of a shaft bolt 14 or the like, and the tool body is installed on the main shaft of the machining center to chamfer the center holes at both the large and small ends of the crankshaft. By using this C-type hole chamfering tool, the chamfered surface can be smooth without vibration marks. Through the blue dye test, the coincidence rate between the chamfering surface 22 and the standard mode tip cone surface can reach up to 100%, which ensures the roundness of the chamfered circular surface and provides a strong guarantee for the center hole positioning rotary grinding of the shaft diameter with extremely small tolerances in the grinding process.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hole chamfering C-type cutter, characterized in that, It includes a blade (1), and a plurality of arc chip removal grooves (11) are arranged on the surface of the blade (1). An arc chamfer (12) is arranged at the edge of the arc chip removal groove (11) close to the outside of the blade (1); a cutting clearance angle (13) is arranged on the side wall of the blade (1).

2. The chamfered hole C-type tool according to claim 1, characterized in that, The opening transverse diameter of the arc chip removal groove (11) is 1 - 1.5 mm.

3. The chamfered hole C-type cutting tool according to claim 2, characterized in that, The opening transverse diameter of the arc chamfer (12) is 0.02 - 0.06 mm.

4. The chamfered hole C-type cutter according to claim 1, wherein, The cutting clearance angle (13) is 6 ± 1 degree.

5. The chamfered hole C-type cutter according to any one of claims 1 to 4, characterized in that It further includes a chamfering tool body (2). At least one shaft bolt (14) penetrates through the blade (1). The shaft bolt (14) is arranged along the surface of the blade (1) towards the bottom surface of the blade (1). One end of the shaft bolt (14) close to the bottom surface of the blade (1) is detachably connected to the chamfering tool body (2).

6. The chamfered hole C-type cutter according to claim 5, characterized in that, The chamfering tool body (2) is configured with a connecting rod (21). A chamfer surface (22) is recessed in the connecting rod (21). The blade (1) is arranged on the chamfer surface (22) through the shaft bolt (14).

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