Internal cutting coring cutter assembly

Abstract

The utility model aims to provide the internal cutting coring cutter assembly which can relatively completely reserve and take out an inner core part of a raw material piece on the basis of carrying out rotary groove turning processing on the end face of the raw material piece. The inner cutting coring tool assembly comprises an inner cutting tool which can be placed in a circular groove formed in a raw material part in advance, and the inner cutting tool comprises a tool bit part which is located at the front end and used for cutting off. The tool bit part can rotate around the other central axis parallel to the rotation axis of the raw material piece and cut off an inner core part, located on the inner side of the annular groove, of the raw material piece from outside to inside.

Description

Technical Field

[0001] The utility model relates to the field of workpiece product cutting tool equipment, in particular to an internal cutting and coring tool assembly. Background Art

[0002] Turning, also known as lathe machining, is a common form of machining. It mainly uses the rotational motion of the workpiece and the linear or curved motion of the tool to change the shape and size of the blank to meet the requirements of the drawing. During the lathe machining process, the workpiece rotates while the tool remains stationary. In addition, the lathe is equipped with a variety of tools such as drills, reamers, reamers, taps, dies and knurling tools to meet different machining needs. The types of lathes are very diverse, including instrument lathes, single-spindle automatic lathes, multi-spindle automatic or semi-automatic lathes, return wheel or turret lathes, crankshaft and camshaft lathes, vertical lathes, floor and horizontal lathes, etc. These different types of lathes can meet a variety of different machining needs.

[0003] Common turning equipment is generally used to remove material from the outer surface of a workpiece with a cylindrical or arc shape. Of course, turning can also be used to remove material from the inside of the workpiece to form a cylindrical chamber. For example, a carbide woodworking cutting milling cutter given in the Chinese utility model patent application document with application number CN201911343075.9 includes a handle and a head. The head is fixed on the handle. The head includes a cutting part, a chip breaker, and a cutting edge. There are two pairs of cutting edges, one pair of cutting edges has more than two chip breakers, and the other pair of cutting edges has no chip breakers. The two pairs of cutting edges are installed in an offset manner, and there is a cutting part between the cutting edges. Compared with welded carbide tools, this type of tool has greatly improved the hardness, wear resistance, and service life of the tool cutting edge, reduced the number of tool grinding and tool replacement, and the tool cutting and grooving is smoother; compared with integral alloy tools, the production cost of the tool is reduced as much as possible. However, the applicant has found that a tool with a similar structure, whether it is a fixed tool head or a self-rotating tool head, can only open a columnar or annular vertical chamber when grooving and removing materials from the end surface of a cylindrical raw material. For some more expensive raw materials, such as high-value solid wood and jade originals, when it is necessary to process and form a cylindrical chamber with a single opening in a barrel or cup, if such a tool is used for processing, the material of the inner core can only be completely destroyed, which will obviously cause a large amount of material waste, and of course it is even more impossible to perform special processing such as more detailed grooving on the inner core.

[0004] In view of the above problems, the utility model provides an inner cutting coring tool assembly which can relatively completely retain and remove the inner core part of a raw material part on the basis of performing rotary grooving processing on the end surface of the raw material part. Utility Model Content

[0005] The utility model provides an inner cutting and coring tool assembly which can relatively completely retain and remove the inner core part of a raw material piece on the basis of performing rotary groove machining on the end surface of the raw material piece.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] An internal cutting coring tool assembly includes an internal cutting tool that can be placed in an annular groove previously opened on a raw material piece, the internal cutting tool includes a tool head located at the front end for cutting, the tool head can rotate around another central axis parallel to the rotation axis of the raw material piece and realize cutting of the inner core part of the raw material piece located on the inner side of the annular groove from the outside to the inside.

[0008] As a preferred embodiment of the utility model, it also includes a rotary tool holder for installing the inner cutting tool, the rotary tool holder is provided with a rotary guide slot running through in the horizontal direction; the rear side of the inner cutting tool is formed with a connecting rod portion for inserting into the rotary guide slot.

[0009] As a preferred embodiment of the present invention, a circular arc-shaped supporting surface is formed on the top of the rotary tool holder.

[0010] As a preferred embodiment of the present invention, a plurality of convex teeth extending downward are formed at the front end of the cutter head.

[0011] As a preferred embodiment of the utility model, it also includes a driving handle for driving the inner cutting tool to rotate to complete the cutting action; a connecting slot intersecting with the rotating guide slot is opened from the outside to the inside on the side of the rotating tool holder, and one end of the driving handle is installed inside the connecting slot and connected to the connecting rod portion.

[0012] As a preferred embodiment of the present invention, a detachable threaded engagement structure is formed between the driving handle and the connecting rod portion, and the detachable threaded engagement includes a screw segment protruding outwardly formed on the side of the connecting rod portion, and also includes a screw hole portion opened at the end of the driving handle and capable of being screwed together with the screw segment to form an integral whole.

[0013] As a preferred embodiment of the present invention, a telescopic adjustment mechanism is formed on the driving handle.

[0014] As a preferred embodiment of the present invention, a rotary driving handle is formed at the outer end of the driving handle.

[0015] As a preferred embodiment of the present invention, a snap-fit ​​connection portion for clamping and fixing with a working platform is provided at the rear end of the rotary tool holder.

[0016] In summary, the utility model can achieve the following multiple beneficial effects:

[0017] Compared with the tool structure for removing the inner core part in the traditional process, the internal cutting and coring tool assembly provided in the utility model not only effectively saves materials, but also can retain the inner core part of the raw material to a great extent and remove it relatively completely. It is particularly suitable for processing some relatively precious wood or jade raw materials.

[0018] In the internal cutting core removal tool assembly provided in the solution of the utility model, the top surface of the rotary tool holder as the installation base is made into an arc shape. When the rotary tool holder and the internal cutting tool are placed in the inner ring groove together, the arc-shaped supporting surface can abut against the outer inner wall surface of the circular ring groove. Through this abutment effect, a supporting force can be given to the tool at the front end during the process of the internal cutting tool cutting the inner core, effectively avoiding the bending deformation of the connecting rod part and the vibration during the cutting process, making the processing process more stable and reliable.

[0019] The driving handle for driving the rotation of the cutter head in the internal cutting and coring tool assembly provided in the utility model is also formed with a retractable adjustment mechanism, so that the length of the driving handle can be adjusted according to different raw material materials, thereby more specifically changing and adjusting the extrusion force applied to the material to obtain a better cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the inner cutting coring tool assembly;

[0021] Figure 2 It is a structural schematic diagram of the rotary tool holder;

[0022] Figure 3 It is a schematic diagram of the structure of the inner cutting tool;

[0023] Figure 4 It is a schematic diagram of the principle that the inner cutting tool cuts off the inner core part of the raw material by rotating;

[0024] Figure 5 It is a schematic diagram of the principle of a detachable threaded screw-on structure and a telescopic adjustment mechanism.

[0025] In the figure:

[0026] 1——raw material, 101——circular groove, 102——inner core;

[0027] 2——internal cutting tool, 201——cutting head, 2011——convex tooth part, 202——connecting rod part;

[0028] 3 - rotary tool holder, 301 - rotary guide slot, 302 - support surface, 303 - connection notch, 304 - snap-fit ​​connection portion;

[0029] 4 – driving handle, 401 – rotary driving handle;

[0030] 5——detachable threaded screwing structure, 501——screw section, 502——screw hole portion;

[0031] 6——Retractable adjustment mechanism. DETAILED DESCRIPTION

[0032] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0033] This solution is achieved through the following technical means:

[0034] Embodiment: The internal cutting coring tool assembly provided in this embodiment mainly comprises two parts: an internal cutting tool 2 originally used for cutting processing and a rotary tool holder 3 for movably mounting the internal cutting tool 2.

[0035] Specifically, referring to the structure given in the drawings of the specification, the inner cutting tool 2 includes a cutting head 201 at the front end for cutting, and the cutting head 201 is in the shape of a flat sheet, and its lower edge protrudes downward to form a plurality of convex teeth 2011 for cutting and removing the material inside the raw material 1. A connecting rod 202 in the shape of a slender cylindrical rod is protruded downward on one end surface of the inner cutting tool 2.

[0036] The inner cutting tool 2 is movably mounted on a rotary tool holder 3 at the rear side. Specifically, the rotary tool holder 3 can be divided into a main body at the front and a clamping connection part 304 at the rear. The main body of the rotary tool holder 3 is in a flat plate state, and the upper surface of the main body is convex upward to form a circular arc-shaped support surface 302. Of course, the instructions are attached. Figure 2 and 3 Taking the independent structure of the components as an example, in order to facilitate the insertion of the cutter head 201 and the front end of the rotary tool holder 3 into the annular groove 101 provided on the raw material 1, the cutter head 201 and the front end of the rotary tool holder 3 can be set to be in an arc shape. The shape of the clamping connection part 304 at the rear side of the rotary tool holder 3 is a flat block, so as to facilitate clamping and fixing using a working platform.

[0037] A rotating guide slot 301 penetrating in the horizontal direction is provided on the side of the aforementioned rotating tool holder 3. The rotating guide slot 301 is provided on the front end face of the rotating tool holder 3 and is in the shape of a cylindrical hole extending from front to rear. A connecting rod portion 202 which is also cylindrical and is used to be inserted into the rotating guide slot 301 is formed on the rear side of the inner cutting tool 2.

[0038] The inner cutting core removal tool assembly also includes a driving handle 4 for driving the inner cutting tool 2 to rotate and complete the cutting action. Specifically, when installing and connecting the driving handle 4, it is first necessary to open a connecting notch 303 intersecting with the rotating guide slot 301 from the outside to the inside on the side of the rotating tool holder 3, and one end of the driving handle 4 is installed inside the connecting notch 303 and connected to the connecting rod portion 202 through a detachable threaded screwing structure 5. The detachable threaded screwing structure 5 here includes a screw segment 501 formed on the side of the connecting rod portion 202 and protruding outward, and a screw hole portion 502 opened at the end of the driving handle 4 and capable of being screwed and connected to the screw segment 501 as a whole. Specifically, the screw segment 501 here can be formed by first opening a through threaded hole on the aforementioned connecting rod portion 202, and then screwing a bolt into the threaded hole in an inverted state, at which time the screw portion of the bolt protrudes outward, thus forming the screw segment 501 in the aforementioned detachable threaded screwing structure 5. At this time, the rod-shaped driving handle 4 with a screw hole portion 502 formed at the end is screwed and installed with the screw segment 501 by rotating, thus completing the connection and fixing installation between the various components.

[0039] It should be noted that when using the internal cutting and coring tool assembly provided in this embodiment, it is necessary to first use a milling cutter that is in the shape of an elongated rod as a whole to perform material removal processing on the end face of the raw material 1. While the milling cutter itself rotates at high speed, it mills in the material removal from the outside to the inside along a circular trajectory until a circular groove 101 of a certain target depth is formed on the raw material 1. At this time, the raw material 1 is fixed on a rotary work platform using a three-jaw chuck, and then the cutter head 201 and the front end of the rotary tool holder 3 in the internal cutting and coring tool assembly in this scheme are placed together into the interior of the circular groove 101. When the rotary work platform starts working, the raw material 1 will continue to rotate, and then the drive handle 4 is used to drive the cutter head 201 to rotate, so that the convex tooth portion 2011 formed on the lower edge of the cutter head 201 cuts into the bottom connection of the inner core portion 102 from the outside to the inside. See the attached instruction manual. Figure 4 Taking the given structure as an example, as the driving handle 4 rotates, the outer toothed portion will cut the inner core portion 102 from the outside to the inside until the cylindrical inner core portion 102 on the inner side of the annular groove on the raw material 1 is completely cut off, separated and taken out.

[0040] Of course, in order to make it easier for the user to operate the driving handle 4 for rotation, a T-shaped rotary driving handle 401 can also be formed at the outer end of the driving handle 4. Furthermore, in order to adjust the cutting and extrusion force applied by the cutter head 201 to the inner core 102 according to different cutting materials, a telescopic adjustment mechanism 6 can also be set on the driving handle 4. Specifically, for example, the driving handle 4 can be designed as a multi-section structure, and the two sub-rod sections are also connected and installed by a threaded structure; through the relative rotation between the two parts of the rod sections, the overall telescopic change of the driving handle 4 is realized, thereby adjusting the force during the cutting process of the inner core, while ensuring high processing efficiency, avoiding the raw material 1 from being broken and damaged.

[0041] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An internal cutting coring tool assembly, characterized in that: The invention comprises an inner cutting tool (2) which can be placed in a circular groove (101) previously formed on a raw material (1), the inner cutting tool (2) comprising a cutting head (201) located at the front end for cutting, the cutting head (201) being able to rotate about another central axis parallel to the rotation axis of the raw material (1) and to achieve cutting of an inner core (102) located inside the circular groove (101) on the raw material (1) from the outside to the inside.

2. The inner cutting coring tool assembly according to claim 1, characterized in that: It also comprises a rotary tool holder (3) for mounting the inner cutting tool (2), the rotary tool holder (3) being provided with a rotary guide slot (301) penetrating in a horizontal direction; and a connecting rod portion (202) for inserting into the rotary guide slot (301) is formed on the rear side of the inner cutting tool (2).

3. The inner cutting coring tool assembly according to claim 2, characterized in that: A circular arc-shaped supporting surface (302) is formed on the top of the rotary tool holder (3).

4. The inner cutting coring tool assembly according to claim 3, characterized in that: A plurality of convex teeth (2011) extending downwards are formed at the front end of the cutter head (201).

5. The inner cutting coring tool assembly according to claim 4, characterized in that: It also includes a driving handle (4) for driving the inner cutting tool (2) to rotate and complete the cutting action; a connecting notch (303) intersecting with the rotating guide slot (301) is provided from the outside to the inside on the side of the rotating tool holder (3); one end of the driving handle (4) is installed inside the connecting notch (303) and connected to the connecting rod portion (202).

6. The inner cutting coring tool assembly according to claim 5, characterized in that: A detachable threaded screw-in structure (5) is formed between the driving handle (4) and the connecting rod portion (202), wherein the detachable threaded screw-in structure includes a screw segment (501) formed on the side of the connecting rod portion (202) and protruding outward, and also includes a screw hole portion (502) opened at the end of the driving handle (4) and capable of being screwed together with the screw segment (501) to form an integral whole.

7. The inner cutting coring tool assembly according to claim 6, characterized in that: A telescopic adjustment mechanism (6) is formed on the driving handle (4).

8. The inner cutting coring tool assembly according to claim 6, characterized in that: A rotary drive grip (401) is formed at the outer end of the drive handle (4).

9. The inner cutting coring tool assembly according to claim 3, characterized in that: The rear end of the rotary tool holder (3) is provided with a snap-fit ​​connection portion (304) for clamping and fixing with the working platform.

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