Spring inner chamfering cutter

Abstract

The utility model provides a spring inner rose reamer which comprises at least three blades, and cutting edges of the at least three blades are at least partially located on the side face of the same virtual cone and are the same in height. According to the three-blade chamfering cutter, the production efficiency of spring inner chamfering operation can be effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of machining devices, in particular to a spring chamfering device. Background Art

[0002] Valve spring products require chamfering of both end faces. The current processing method is to locate the spring based on its outer diameter and use a chamfering cutter for rotary scraping. However, due to the perpendicularity between the valve spring end face and the spring outer diameter axis, the processing quality of single-edged or double-edged chamfering cutters is very uneven and does not meet quality requirements. Summary of the Invention

[0003] Based on this, the utility model aims to overcome the defects of the prior art and provide a spring inner chamfering cutter with high production efficiency and low cost.

[0004] A spring internal chamfering cutter comprises at least three blades, wherein the cutting edges of the at least three blades are at least partially located on the side surfaces of the same virtual cone and have the same height.

[0005] Specifically, the cutting edges of at least three of the blades at least partially extend along different generatrixes of the same virtual cone and have the same height.

[0006] Specifically, at least parts of the cutting edges of at least three of the blades are straight lines, and their extended lines intersect with the rotation axis of the tool holder.

[0007] Specifically, the blade is a triangular blade, and any blade has at least three cutting edges.

[0008] Specifically, the blades are all cemented carbide blades.

[0009] Furthermore, it also includes a tool holder and at least three tool rods arranged on the tool holder, and the blades are installed on the tool rods.

[0010] Specifically, there are three knife bars and three blades.

[0011] Furthermore, the tool holder has a tool rod mounting end, which is provided with a tool rod hole for mounting the tool rod, and a fixing hole is provided on the side of the tool holder corresponding to the tool rod hole for fixing the tool rod in the tool rod hole by a fastener.

[0012] Specifically, at least three tool rods are rotationally symmetrical with respect to the rotation axis of the tool holder.

[0013] The advantages of this application over the prior art are:

[0014] The present invention provides a spring internal chamfering cutter. This cutter utilizes at least three blades combined to form a three-edge chamfering cutter. Compared to existing single-edge or double-edge chamfering cutters, this cutter significantly improves production efficiency and reduces costs. The original chamfering efficiency was approximately 1500 pieces per hour, but the improved chamfering efficiency has increased to approximately 1800 pieces per hour, increasing processing speed by approximately 20% and reducing labor hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a spring inner chamfering cutter according to an embodiment of the present application;

[0016] Figure 2 This is a side structural diagram of a spring inner chamfering cutter according to an embodiment of the present application;

[0017] Figure 3 This is a side structural schematic diagram of a blade and a shank of a spring internal chamfering cutter according to an embodiment of the present application;

[0018] Figure 4 This is a side structural schematic diagram of a tool holder for a spring internal chamfering tool according to an embodiment of the present application;

[0019] Figure 5 This is another side structural schematic diagram of a tool holder for a spring internal chamfering tool according to an embodiment of the present application;

[0020] Figure annotation:

[0021] Tool holder 1; tool holder mounting end 11; tool arbor mounting end 12; tool arbor hole 13; fixing hole 14; rotation axis A; tool arbor 2; fixing end 21; cutting end 22; blade 3; cutting edge 31. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] See also Figure 1-5 The embodiment of the present application provides a spring internal chamfering tool, comprising a tool holder 1, at least three tool rods 2, and at least three blades 3.

[0024] The tool holder 1 can be roughly cylindrical or in other shapes, one end of which is the tool holder mounting end 11, which can be provided with threaded holes, snap grooves and other mounting structures to install it on the chamfering machine; the other end is the tool rod mounting end 12, which is provided with at least three circumferentially arranged tool rod holes 13 to accommodate the insertion of the tool rod 2 and fix it to the tool holder 1 through the inserted part of the tool rod 2; the tool holder 1 has a rotation axis A, and the tool holder 1 can rotate around the rotation axis A under the drive of the chamfering machine.

[0025] One end of the shank 2 is a fixed end 21 for being inserted into the shank hole 13 of the tool holder 1 to install and fix the shank 2 ; the other end is a cutting end 22 , which is concave to form a blade groove for installing the blade 3 .

[0026] The blade 3 has a cutting edge 31, and the cutting edges 31 of at least three blades 3 are at least partially located on the side of the same virtual cone and at the same height. In other words, there are at least three blades 3, wherein each blade 3 has at least a portion of its cutting edge 31 located on the side of the same virtual cone and at the same height. The heights described in this application refer to the height relative to the bottom surface of the virtual cone. It should be understood by those skilled in the art that the rotation axis of the virtual cone and the rotation axis A of the tool holder 1 are located on the same straight line, so that the cutting edges 31 of at least three blades 3 can be used simultaneously to chamfer the inner side surface of the spring.

[0027] There may be a plurality of cutter bars 2 , cutter bar holes 13 and blades 3 , for example, four, five, six, etc. Preferably, there are three cutter bars 2 , three cutter bar holes 13 and three blades 3 in total.

[0028] As an example

[0029] Furthermore, the cutting edges 31 of at least three blades 3 extend at least partially along different generatrixes of the same virtual cone and have the same height. That is, there are at least three blades 3, wherein each blade 3 has at least one section of its cutting edge 31 (the entire cutting edge or a portion of the cutting edge) extending along different generatrixes of the same virtual cone, and the starting and ending heights of these cutting edges 31 (at least three sections) are the same.

[0030] Furthermore, the cutting edges 31 of at least three blades 3 are at least partially straight lines, and their extended lines intersect with the rotation axis A of the tool holder 1 .

[0031] Specifically, the blade 3 is a triangular blade, and any blade 3 has at least three cutting edges 31. Specifically, each side of the triangular blade is a cutting edge 31.

[0032] Furthermore, at least three blades 3 are rotationally symmetric with respect to the rotation axis A of the blade holder 1 .

[0033] As an example

[0034] Specifically, a fixing hole 14 is provided on the side of the tool holder 1 at a position corresponding to the tool rod hole 13, for fixing the tool rod 2 in the tool rod hole 13 by means of a fastener (such as a screw, a pin, etc.).

[0035] Furthermore, at least three tool bars 2 are rotationally symmetrical relative to the rotation axis A of the tool holder.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A spring internal chamfering cutter, characterized by: The invention comprises at least three blades, a tool holder and at least three tool rods arranged on the tool holder, wherein the blades are mounted on the tool rods, the tool holder has a tool rod mounting end, the tool rod mounting end is provided with a tool rod hole for mounting the tool rod, and a fixing hole is provided on the side of the tool holder corresponding to the tool rod hole, which is used to fix the tool rod in the tool rod hole by a fastener, and the cutting edges of the at least three blades are at least partially located on the side of the same virtual cone and at the same height.

2. A spring internal chamfering cutter according to claim 1, characterized in that: The cutting edges of at least three of the blades at least partially extend along different generatrixes of the same virtual cone and have the same height.

3. A spring internal chamfering cutter according to claim 2, characterized in that: The cutting edges of at least three of the blades are at least partially straight lines, and their extended lines intersect with the rotation axis of the tool holder.

4. A spring internal chamfering cutter according to claim 3, characterized in that: The blade is a triangular blade, and any blade has at least three cutting edges.

5. A spring internal chamfering cutter according to claim 4, characterized in that: The blades are all carbide blades.

6. A spring inner chamfering cutter according to any one of claims 1 to 5, characterized in that: There are three knife bars and three blades in total.

7. A spring internal chamfering cutter according to claim 6, characterized in that: At least three tool bars are rotationally symmetrical with respect to the tool holder rotation axis.

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