Double-sided machine clamping type chamfering tool

Abstract

The utility model discloses a double-sided machine clamping type chamfering cutter, and relates to the technical field of machining. The double-sided machine-clamping type chamfering cutter comprises a cutter handle, a cutter shaft, a cutter head and a cutter head, and the cutter handle is of a cylindrical structure and used for being connected with an operating handle; the cutter body is of a cylindrical structure, the cutter body and the cutter handle are eccentrically arranged, and the cutter body is fixedly connected with the cutter handle; the chip removal groove is a notch formed in the cutter body, so that the cutter body forms a notch arc structure; the two blades are of a regular triangle structure, the two blades are fixedly connected to the notch face of the eccentric side of the chip groove, and the two blades are symmetrically arranged about the center line of the notch face; one corner of the blade extends out of the chip groove, and an included angle is formed between the edge, arranged outside the chip groove, of the blade and the side edge of the chip groove.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a double-sided indexable chamfering tool. Background Art

[0002] At present, chamfering tools are mostly used for chamfering workpieces. When machining the chamfer of a workpiece, the chamfering tool is generally rotated to machine chamfers around the workpiece.

[0003] In the machining of the 2×15°( ) chamfer (double-sided) of the hole of the main component boom of the braking caliper of high-speed trains and standard EMUs, the common machining process is as follows: 1. After finishing the Φ28 hole, use a self-made 30° cone tool to chamfer the outer angle of 1.5×45°; 2. Then replace it with a self-made reverse 30° chamfering tool to chamfer the inner angle of 1.5×45° in a differential interpolation form. Figure 1 ) chamfer (double-sided) of the hole of the main component boom of the braking caliper of high-speed trains and standard EMUs, the common machining process is as follows: 1. After finishing the Φ28 hole, use a self-made 30° cone tool to chamfer the outer angle of 1.5×45°; 2. Then replace it with a self-made reverse 30° chamfering tool to chamfer the inner angle of 1.5×45° in a differential interpolation form.

[0004] The above machining process requires two tool changes, the differential interpolation takes too long, the tool wears quickly, it is difficult to guarantee the machining dimensional accuracy, and the production efficiency is low. Summary of the Utility Model

[0005] Therefore, the embodiment of the utility model provides a double-sided indexable chamfering tool to solve the problems existing in the prior art that the existing chamfering tool requires two tool changes for chamfering, the differential interpolation takes too long, the tool wears quickly, it is difficult to guarantee the machining dimensional accuracy, and the production efficiency is low.

[0006] In order to achieve the above object, the embodiment of the utility model provides the following technical solutions:

[0007] A double-sided indexable chamfering tool, comprising:

[0008] A tool shank, the tool shank is of a cylindrical structure and is used to connect an operating handle;

[0009] A tool body, the tool body is of a cylindrical structure, the tool body is eccentrically arranged with the tool shank, and the tool body is fixedly connected with the tool shank;

[0010] A chip removal groove, the chip removal groove is a notch opened on the tool body, so that the tool body forms a structure of a notch arc;

[0011] Two cutting blades, the cutting blades are of an equilateral triangle structure, both of the two cutting blades are fixedly connected to the notch surface on the eccentric side of the chip removal groove, and the two cutting blades are symmetrically arranged with respect to the midline of the notch surface; one of the angles of the cutting blade extends out of the chip removal groove, and an included angle is provided between one side edge of the cutting blade extending out of the chip removal groove and the side edge of the chip removal groove.

[0012] Optionally, two grooves are provided on the circumferential side of the tool handle, and the two grooves respectively correspond to two positioning bolts on the operating handle, so that the tool handle is fixedly connected to the operating handle.

[0013] Optionally, the fixed connection between the blade and the tool body is a detachable fixed connection.

[0014] Optionally, the blade and the tool body are connected by a locking screw.

[0015] Optionally, the included angle between one side of the blade extending out of the chip removal groove and the side of the chip removal groove is 15°.

[0016] Optionally, the notch of the chip removal groove is a 1 / 4 arc.

[0017] Optionally, the blade is eccentrically arranged in the radial direction of the tool body.

[0018] Optionally, the blade is a regular triangular single-sided cutting structure, and all three sides can be used as cutting edges.

[0019] Optionally, the distance between the centers of the two blades is 40 mm.

[0020] The utility model has at least the following beneficial effects:

[0021] The utility model is provided with two blades on the tool body. The two blades are symmetrically arranged. When one blade advances forward, it chamfers the outer corner, and when the other blade is pulled back, it chamfers the inner corner. There is no need to change the tool, and the size is stable. The inner and outer corners can be chamfered without calibrating the position of the tool, improving the accuracy, and thus improving the production efficiency while ensuring the machining accuracy.

[0022] The utility model is provided with a blade having a regular triangular single-sided cutting structure, and all three sides can be used as cutting edges. At the same time, the blade and the tool body are detachably connected. After one side is worn, the blade can be conveniently removed and the intact side can be used as the cutting edge. It is convenient to replace the blade, and at the same time, the service life of each blade is improved. Description of the Drawings

[0023] In order to more clearly illustrate the prior art and the present utility model, the following will briefly introduce the drawings required for describing the prior art and the embodiments of the present utility model. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the provided drawings.

[0024] The structures, ratios, sizes, etc. illustrated in this specification are only used to match the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0025] Figure 1 It is a schematic diagram of the dimensional accuracy of the workpiece (hanging rod) to be processed.

[0026] Figure 2 It is a schematic diagram of the structure from the first perspective of an embodiment of the present utility model;

[0027] Figure 3 It is a schematic diagram of the structure from the second perspective of an embodiment of the present utility model;

[0028] Figure 4 It is a schematic diagram of the structure from the third perspective of an embodiment of the present utility model.

[0029] Explanation of reference numerals:

[0030] 1. Tool shank; 2. Tool body; 3. Chip fluting; 4. Blade; 5. Groove; 6. Locking screw. Detailed implementation manners

[0031] In order to make the objectives, technical solutions and advantages of this application clearer, the following further elaborates on this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0032] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are intended to distinguish the objects being referred to. For solutions with a time sequence process, this way of term expression does not necessarily need to be understood as describing a specific order or sequence, and for solutions of device structures, this way of term expression also does not distinguish the importance level, positional relationship, etc.

[0033] In addition, the terms "comprising", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units that are clearly listed, but may also include other steps or units that are inherent to these processes, methods, products or devices although not clearly listed, or steps or units added based on further optimized solutions conceived from the present utility model.

[0034] As Figures 2-4 shown, a double-sided machine-clamped chamfering tool disclosed by the present utility model includes:

[0035] A tool shank 1, the tool shank 1 is of a cylindrical structure, and the tool shank 1 is used to connect an operating handle;

[0036] A tool body 2, the tool body 2 is of a cylindrical structure, the tool body 2 is eccentrically arranged with respect to the tool shank 1, and the tool body 2 is fixedly connected to the tool shank 1;

[0037] A chip removal groove 3, the chip removal groove 3 is a notch opened on the tool body 2, so that the tool body 2 forms a structure with a notch arc; the chip removal groove 3 adopts a chip removal method with a rotation gap close to 1 / 4 circle, and the large space has a good chip removal effect.

[0038] Two cutting blades 4, the cutting blades 4 are of an equilateral triangle structure, both of the two cutting blades 4 are fixedly connected to the notch surface on the eccentric side of the chip removal groove 3, and the two cutting blades 4 are symmetrically arranged with respect to the midline of the notch surface; one of the corners of the cutting blade 4 extends out of the chip removal groove 3, and an included angle is provided between one side edge of the cutting blade 4 extending out of the chip removal groove 3 and the side edge of the chip removal groove 3.

[0039] The above-mentioned chamfering tool is assembled by a tool shank 1, two equilateral triangle cutting blades 4, and a tool body 2. The cutting blade 4 and the tool body 2 are fixedly installed through a locking screw 6; among them, the material of the tool shank 1 is 45Cr, and the material is quenched and tempered to increase the tensile strength and toughness of the tool shank 1, so as to improve the stability of the cutting process and ensure the process parameters. And the tool shank 1 is set as a φ25 side-fixed type, so that the tool is firmly clamped and not easy to loosen and rotate; the material of the cutting blade 4 is selected as QT500-7 material which is easy to process. The shape of the cutting blade 4 is set as single-sided cutting of an equilateral triangle, and the three cutting edges can be replaced and used to improve the use efficiency. The designed installation angle of the equilateral triangle cutting blade 4 and the designed distance between the two cutting blades 4 are set according to the dimensions required by the workpiece drawing. The cutting blade 4 is designed radially as an eccentric type to facilitate the eccentric entry into the Φ28 hole.

[0040] Two grooves 5 are opened on the circumferential side of the tool shank 1, and the two grooves 5 respectively correspond to two positioning bolts on the operating handle, so that the tool shank 1 is fixedly connected to the operating handle.

[0041] The two grooves 5 on the tool shank 1 are arranged along the axial direction of the tool shank 1, and the two grooves 5 respectively correspond to the positioning bolts on the operating handle, so that a side-fixed connection is formed between the tool shank 1 and the handle, making the tool firmly clamped and not easy to loosen and rotate.

[0042] The fixed connection between the cutting blade 4 and the tool body 2 is a detachable fixed connection.

[0043] The blade 4 is fixedly connected to the tool body 2 in a detachable manner. According to the wear condition of the blade 4, the blade 4 is removed, rotated by a certain angle, the complete cutting edge is rotated to the outside, and then installed.

[0044] The specific installation method between the blade 4 and the tool body 2 is as follows: the blade 4 is connected to the tool body 2 by a locking screw 6, and the locking screw 6 is an M4 hexagon socket head screw.

[0045] The included angle between one side of the blade 4 extending out of the chip fluting 3 and the side of the chip fluting 3 is 15°.

[0046] The notch of the chip fluting 3 is a 1 / 4 arc.

[0047] The blade 4 is eccentrically arranged in the radial direction of the tool body 2.

[0048] The blade 4 has a positive triangular single-sided cutting structure, and all three sides can be used as cutting edges.

[0049] The distance between the centers of the two blades 4 is 40 mm.

[0050] The processing technology of using the double-sided machine-clamped chamfering tool of the present utility model is as follows:

[0051] 1. After finishing the Φ28 hole, use the chamfering tool of this application to enter the Φ28 hole axially from the side, then align the axis, chamfer the outer angle forward by 1.5×45°, and chamfer the inner angle backward by 1.5×45° when pulling back.

[0052] 2. After processing with the chamfering tool of this application, the size is stable, the time used is shortened by about half, and the time for replacing the blade 4 is short after the tool is worn, thus improving the processing efficiency.

[0053] 3. Due to the selection of reasonable blade 4 material and processing parameters (rotation speed S2000 r / min, feed F200) for the chamfering tool of this application, it has been significantly improved compared with before the improvement.

[0054] And through more than one year of use, it can be seen that the chamfering tool of this application has a fast speed for internal and external chamfering of 1.5×45°, stable size, good durability due to the appropriate selection of tool material, and the toughness and strength of the tool bar material are also improved after heat treatment, so that the stability during the processing is good, and the selection of the locking screw 6 is also appropriate, and no loosening phenomenon is seen.

[0055] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0056] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.

[0057] In the foregoing, the present utility model has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be noted that, without departing from the concept of the present utility model, it is obvious that several modifications and improvements can still be made to these specific embodiments, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.

Claims

1. A double-sided machine-clamped chamfering tool, characterized in that, It is characterized in that it includes: A tool handle (1), the tool handle (1) is of a cylindrical structure, and the tool handle (1) is used to connect the operating handle; A tool body (2), the tool body (2) is of a cylindrical structure, the tool body (2) is eccentrically arranged with respect to the tool handle (1), and the tool body (2) is fixedly connected to the tool handle (1); A chip removal groove (3), the chip removal groove (3) is a notch opened on the tool body (2), so that the tool body (2) forms a structure with a notch arc; Two cutting blades (4), the cutting blades (4) are of an equilateral triangle structure, and the two cutting blades (4) are both fixedly connected to the notch surface on the eccentric side of the chip removal groove (3), and the two cutting blades (4) are symmetrically arranged with respect to the midline of the notch surface; One of the angles of the cutting blade (4) extends out of the chip removal groove (3), and there is an included angle between one side edge of the cutting blade extending out of the chip removal groove and the side edge of the chip removal groove.

2. The double-sided machine-clamped chamfering tool according to claim 1, wherein: Two grooves (5) are provided on the circumferential side of the tool handle (1), and the two grooves (5) respectively correspond to two positioning bolts on the operating handle, so that the tool handle (1) is fixedly connected to the operating handle.

3. The double-sided machine-clamped chamfering tool according to claim 1, wherein: The fixed connection between the cutting blade (4) and the tool body (2) is a detachable fixed connection.

4. The double-sided machine-clamped chamfering tool according to claim 3, characterized in that: The cutting blade (4) and the tool body (2) are connected by a locking screw (6).

5. A double-sided machine-clamped chamfering tool according to claim 1, characterized in that: The included angle between one side edge of the cutting blade extending out of the chip removal groove and the side edge of the chip removal groove is 15°.

6. The double-sided machine-clamped chamfering tool according to claim 1, characterized in that: The notch of the chip removal groove (3) is a 1 / 4 arc.

7. The double-sided machine-clamped chamfering tool according to claim 1, characterized in that: The cutting blade (4) is eccentrically arranged in the radial direction of the tool body (2).

8. A double-sided machine-clamped chamfering tool according to claim 1, characterized in that: The cutting blade (4) is an equilateral triangle single-side cutting structure, and all three side edges can be used as cutting edges.

9. The double-sided machine clamp type chamfering cutter according to claim 1, wherein: The distance between the centers of the two cutting blades (4) is 40 mm.

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