Cutter for machining

Abstract

The utility model discloses a tool for machining, which belongs to the technical field of machining tools and comprises a tool bar, a tool apron and a blade, the blade is arranged on the tool apron, and the tool apron is connected with the tool bar. The device further comprises a base cutter bridge, a guide base plate and a diameter fine adjustment mechanism. The matrix cutter bridge is used for connecting the cutter handle; the guide base plate is fixedly mounted on the base body cutter bridge; an installation cavity is formed between the butt joint faces of the guide base plate and the base body cutter bridge, and an adjusting through hole is formed in the cutter bar connecting face of the guide base plate, is a long-strip-shaped hole and is communicated with the installation cavity. The diameter fine adjustment mechanism is fixedly mounted in the mounting cavity; the cutter bar is arranged on the guide base plate in a sliding mode, and the diameter fine adjustment mechanism and the cutter bar are connected through a connecting piece located in the adjusting through hole. Under the control of the diameter fine adjustment mechanism, the cutter bar slides relative to the guide base plate to change the diameter of the cutter; the cutter can be suitable for various types of parts; the operation is simple and fast during adjustment, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tools, in particular to a tool for mechanical machining. Background Art

[0002] High-precision holes are generally used for positioning, sealing, fixing bearings, etc. in the actual application of the mechanical field. There are some stepped holes among them. In order to facilitate the assembly of parts in the lower hole, the upper and lower layers of holes are connected together by chamfering. This results in that the bottom of the hole on the side with a smaller inner diameter needs to be provided with a taper chamfer and an R arc chamfer. At present, the commonly used processing method is to process with three tools, namely a fine boring tool, a taper milling cutter, and an alloy milling cutter with an R arc at the bottom, in sequence, and the processing is very difficult and cumbersome. Since three tools are required for processing, through analysis, it is found that the prior art has at least the following problems: the machining time is relatively long, the production capacity is wasted, and the tool changing tables between the three tools are too large or there is over-machining between them, resulting in difficulties in actual assembly of parts and a decline in service performance. Summary of the Invention

[0003] For the problems existing in the prior art, the utility model provides a tool for mechanical machining, which can adjust the diameter according to the needs of processing production, can adjust the angle, reduces the types of tools used while improving the processing efficiency, and improves the machining accuracy of workpieces.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] The utility model provides a tool for mechanical machining, including a tool shank, a tool holder and a cutting blade. The cutting blade is arranged on the tool holder, and the tool holder is connected with the tool shank; it further includes a base tool bridge, a guiding backing plate and a diameter fine-tuning mechanism;

[0006] The base tool bridge is used for connecting the tool handle;

[0007] The guiding backing plate is fixedly installed on the base tool bridge; an installation chamber is formed between the butt joint surfaces of the guiding backing plate and the base tool bridge, and an adjusting through hole is provided on the tool shank connecting surface of the guiding backing plate corresponding to the position of the diameter fine-tuning mechanism. The adjusting through hole is a long hole, which communicates with the installation chamber; the length direction of the adjusting through hole is consistent with the moving direction of the tool shank;

[0008] The diameter fine-tuning mechanism is fixedly installed in the installation chamber;

[0009] The tool shank is slidably arranged on the guiding backing plate, and the diameter fine-tuning mechanism and the tool shank are connected through a connecting piece located in the adjusting through hole; under the control of the diameter fine-tuning mechanism, the tool shank slides relative to the guiding backing plate to change the diameter of the tool.

[0010] In the above-mentioned tool for machining, a first guiding structure is provided on the tool shank connecting surface of the guiding backing plate, and a second guiding structure is provided on the side surface of the tool shank facing the guiding backing plate. Both the first guiding structure and the second guiding structure include a plurality of convex portions that are parallel to each other and spaced apart, and a concave portion is formed between two adjacent convex portions; the convex portions and the concave portions of the second guiding structure are respectively docked with the concave portions and the convex portions of the first guiding structure to jointly guide the sliding of the tool shank.

[0011] In the above-mentioned tool for machining, the tool holder can rotate relative to the tool shank, thereby adjusting the cutting angle of the cutting blade.

[0012] In the above-mentioned tool for machining, an angle scale is provided on the tool shank, and an angle reference line is provided on the tool holder. The angle reference line and the angle scale cooperate to mark the angle of rotation of the tool holder.

[0013] In the above-mentioned tool for machining, the tool shank is provided with a tool holder connecting portion for connecting the tool holder; the tool holder connecting portion is recessed into the tool shank, and a circular arc-shaped first guiding surface is formed on one side of the tool holder connecting portion. The first guiding surface is coaxial with the rotation center of the tool holder; the side surface of the tool holder corresponding to the position of the first guiding surface is a circular arc-shaped second guiding surface, and the first guiding surface and the second guiding surface jointly guide the rotation of the tool holder.

[0014] In the above-mentioned tool for machining, an auxiliary locking member is further provided on the tool shank. The auxiliary locking member is threadedly connected to the tool shank and partially extends to the tool holder and presses on the tool holder.

[0015] In the above-mentioned tool for machining, the tool holder is provided with a cutting blade chamber, and the cutting blade is installed in the cutting blade chamber.

[0016] The beneficial effects of the present utility model are manifested in:

[0017] The tool shank of the tool is slidably arranged on the guiding backing plate and is connected to the diameter fine adjustment mechanism. Under the control of the diameter fine adjustment mechanism, the tool shank slides relative to the guiding backing plate to change the diameter of the tool; enabling the tool to be applicable to various types of parts;

[0018] The tool holder can also adjust the angle relative to the tool shank. Only one tool is required to realize the machining of different taper chamfers, avoiding over-cutting of the side wall of the bearing hole during corner cleaning, and increasing the service performance and service life of the part;

[0019] When the tool performs diameter adjustment or angle adjustment, the operation is simple and fast, improving work efficiency;

[0020] Saving equipment production capacity and reducing production capacity consumption;

[0021] Meanwhile, the joint platform generated by the machining of multiple cutting tools is avoided, reducing the difficulty during assembly. Description of the Drawings

[0022] Figure 1 Schematic diagram of the overall structure of an embodiment of the cutting tool for machining of the present utility model;

[0023] Figure 2 Schematic diagram of the assembly structure of the guiding backing plate and the base tool bridge in the first perspective in the cutting tool for machining of the present utility model;

[0024] Figure 3 Schematic diagram of the assembly structure of the guiding backing plate and the base tool bridge in the second perspective in the cutting tool for machining of the present utility model;

[0025] Figure 4 Schematic diagram of the assembly structure of the guiding backing plate and the base tool bridge in the third perspective in the cutting tool for machining of the present utility model;

[0026] Figure 5 is Figure 4 the enlarged view of area A in

[0027] Figure 6 Schematic diagram of the assembly structure of the tool holder, the cutting blade and the tool shank in the cutting tool for machining of the present utility model;

[0028] Figure 7 Schematic diagram of the structure of the tool shank in the cutting tool for machining of the present utility model;

[0029] Figure 8 Schematic diagram of the structure of the tool holder in the cutting tool for machining of the present utility model.

[0030] In the figure:

[0031] 1 - base tool bridge; 11 - tool shank positioning center hole; 12 - tool shank auxiliary positioning hole; 13 - tool shank positioning groove; 14 - backing plate connection hole; 15 - tool shank connection hole; 16 - clamping groove;

[0032] 2 - guiding backing plate; 21 - first guiding structure; 22 - tool bridge positioning hole; 23 - adjusting through hole; 24 - tool bridge connection hole; 25 - clamping platform;

[0033] 3 - tool shank; 31 - sliding pin connection hole; 32 - auxiliary locking part; 33 - angle scale; 34 - second guiding structure; 35 - tool holder connection hole; 36 - first guiding surface; 37 - tool holder connection part;

[0034] 4 - Tool holder; 41 - Second guiding surface; 42 - Angle reference line; 43 - Blade chamber; 44 - Tool shank connection hole; 45 - Blade connection hole;

[0035] 5 - Diameter fine - tuning mechanism; 51 - Sliding pin; 52 - Diameter adjustment disc; 53 - Mounting hole;

[0036] 6 - Blade. Detailed implementation mode

[0037] For the convenience of those skilled in the art to understand, the following further describes the present utility model with reference to the accompanying drawings.

[0038] Please refer to Figures 1 - 8 , which is an embodiment of a tool for machining provided by the present utility model, including a base tool bridge 1, a guiding backing plate 2, a tool shank 3, a tool holder 4, a diameter fine - tuning mechanism 5 and a blade 6. The guiding backing plate 2 is fixedly installed on the base tool bridge 1, and an installation chamber for installing the diameter fine - tuning mechanism 5 is formed between the assembly surface of the guiding backing plate 2 and the base tool bridge 1; the diameter fine - tuning mechanism 5 is installed in this installation chamber; the tool shank 3 is slidably arranged on the guiding backing plate 2 and is connected to the diameter fine - tuning mechanism 5. Under the control of the diameter fine - tuning mechanism 5, the tool shank 3 can slide relative to the guiding backing plate 2, thereby changing the cutting diameter of the tool. The blade 6 is fixedly installed on the tool holder 4, and the tool holder 4 is installed on the tool shank 3; the tool holder 4 can rotate relative to the tool shank 3, thereby adjusting the cutting angle of the blade 6. Since the tool holder 4 can adjust the angle relative to the tool shank 3 and the tool shank 3 moves relative to the guiding backing plate 2 to adjust the cutting diameter, it is possible to complete the machining of precision boring, the R - arc at the bottom of the hole and the transitional chamfer at the bottom of the hole with one tool.

[0039] Please refer to Figures 2 - 5 , the base tool bridge 1 has a tool shank connection surface and a backing plate connection surface. Among them, as Figure 3 shown, the tool shank connection surface is provided with a tool shank positioning center hole 11, a tool shank positioning groove 13, a tool shank auxiliary positioning hole 12, a backing plate connection hole 14 and a tool shank connection hole 15; the positions of the tool shank positioning center hole 11, the tool shank positioning groove 13, the tool shank auxiliary positioning hole 12, the backing plate connection hole 14 and the tool shank connection hole 15 can be designed according to the structure of the tool shank to be connected. During use, first use the tool shank positioning center hole 11 and the tool shank auxiliary positioning hole 12 to complete positioning with the corresponding positioning structures on the tool shank, and the position of the tool shank positioning groove 13 corresponds to the position of the positioning key on the tool shank. The tool shank positioning groove 13 is clamped with the positioning key to prevent the base tool bridge 1 from rotating; then the tool shank is fixedly connected to the base tool bridge 1 through a bolt located in the tool shank connection hole 15. As Figure 4 shown, the backing plate connection surface is provided with a clamping groove 16.

[0040] Please refer to Figure 2, the guiding backing plate 2 is provided with a tool bridge positioning hole 22 and a tool bridge connecting hole 24, and a clamping platform 25 is arranged on the tool bridge connecting surface of the guiding backing plate 2. The tool bridge positioning hole 22 and the clamping platform 25 are used for positioning the installation of the guiding backing plate 2; the clamping platform 25 is clamped with the clamping groove 16 for rough positioning; the tool bridge positioning hole 22 is then matched with the base tool bridge 1 to achieve precise positioning. Among them, the number and position of the tool bridge positioning holes 22 can be set according to actual needs; the backing plate connecting surface of the base tool bridge 1 is provided with positioning structures such as holes or bosses that cooperate with the tool bridge positioning holes 22 to complete the positioning with the tool bridge positioning holes 22. For example, the base tool bridge 1 is also provided with positioning holes, and the guiding backing plate 2 and the base tool bridge 1 are positioned by a pin shaft. The guiding backing plate 2 and the base tool bridge 1 are fixedly connected by a bolt and nut assembly located in the tool bridge connecting hole 24 and the backing plate connecting hole 14.

[0041] The tool bar connecting surface of the guiding backing plate 2 is provided with a first guiding structure 21, such as Figure 5 shown, the first guiding structure 21 includes a plurality of convex parts arranged parallel to each other and at intervals, and a concave part is formed between two adjacent convex parts. An adjusting through hole 23 is provided at the position corresponding to the diameter fine adjustment mechanism 5 on the tool bar connecting surface. The adjusting through hole 23 is a long hole and communicates with the installation chamber for installing the diameter fine adjustment mechanism 5; the length direction of the adjusting through hole 23 is consistent with the extending direction of the convex part of the first guiding structure 21. The diameter fine adjustment mechanism and the tool bar 3 are connected by a connecting piece located in the adjusting through hole 23. The connecting piece is preferably threadedly connected with one of the diameter fine adjustment mechanism and the tool bar 3. For example, the connecting piece is a bolt.

[0042] The diameter fine adjustment mechanism 5 can adopt a differential screw drive mechanism, and the differential screw drive mechanism belongs to the prior art; therefore, its assembly structure is not shown in the drawings and will not be elaborated here. The diameter fine adjustment mechanism 5 has a diameter adjustment disk 52 and a sliding pin 51. The sliding pin 51 is located in the installation chamber, and rotating the diameter adjustment disk 52 can control the sliding pin 51 to move in the length direction of the adjusting through hole 23; in this way, the outer diameter of the blade 6 can be adjusted and changed. The sliding pin 51 is provided with an installation hole 53, and the installation hole 53 can be a threaded hole. The bolt connecting the tool bar 3 and the sliding pin 51 passes through the adjusting through hole 23.

[0043] Please refer to Figure 6 、 Figure 7, a second guiding structure 34 is provided on the side of the tool shank 3 facing the guiding backing plate 2. The second guiding structure 34 also includes a plurality of tooth-shaped convex portions that are parallel and spaced apart from each other, and a concave portion is formed between two adjacent convex portions. In this way, after the second guiding structure 34 and the first guiding structure 21 are butted, the convex portion of the first guiding structure 21 is slidably disposed in the concave portion of the second guiding structure 34, and the convex portion of the second guiding structure 34 is slidably disposed in the concave portion of the first guiding structure 21, so as to accurately guide the movement of the guide rod 3. Preferably, the convex portion and concave portion structures of the second guiding structure 34 are the same as those of the first guiding structure 21, and the cross-sectional shape of the convex portion coincides with the cross-sectional shape of the concave portion after being flipped 180°, and the sliding guiding accuracy of the second guiding structure 34 and the first guiding structure 21 is high.

[0044] The tool shank 3 is provided with a sliding pin connection hole 31, and the tool shank 3 is connected to and locked in position with the sliding pin 51 through bolts located in the sliding pin connection hole 31 and the mounting hole 53. When the position of the tool shank 3 needs to be adjusted, the bolts connecting the tool shank 3 and the sliding pin 51 can be loosened slightly but still maintained in a connected state. The purpose of loosening the bolts is to ensure that the tight connection between the tool shank 3 and the sliding pin 51 and the guiding backing plate 2 becomes a loose connection, so that the tool shank 3 and the sliding pin 51 have an amount of movement for synchronous movement; then the sliding pin 51 is driven by rotating the adjusting diameter adjustment disc 52, and the sliding pin 51 drives the tool shank 3 to move along the first guiding structure 21 on the guiding backing plate 2, so as to achieve the purpose of adjusting the cutting diameter of the blade 6.

[0045] An angle scale 33 is provided on the tool shank 3 for indicating the angle of adjustment of the tool holder 4.

[0046] A tool holder connection portion 37 is provided at a position of the tool shank 3 adjacent to the angle scale 33. The tool holder connection portion 37 is provided with a tool holder connection hole 35 for connecting the tool holder 4.

[0047] Please refer to Figure 6 and Figure 8 , the tool holder 4 is provided with a blade chamber 43, an angle reference line 42, and a tool shank connection hole 44. A blade connection hole 45 is machined in the blade chamber 43. A suitable blade 6 is selected and installed in the blade chamber 43 according to the drawing requirements, and is fixed by bolts located in the blade connection hole 45. The position of the angle reference line 42 corresponds to the position of the angle scale 33, and the angle reference line 42 and the angle scale 33 cooperate to identify the angle of rotation of the tool holder 4.

[0048] Further, the tool holder connection portion 37 is concave towards the tool bar 3, and a circular arc-shaped first guiding surface 36 is formed on one side of the tool holder connection portion 37. The first guiding surface 36 is coaxial with the tool holder connection hole 35; the angle scale 33 is arranged around the first guiding surface 36. The side surface of the tool holder 4 corresponding to the position of the first guiding surface 36 is a circular arc-shaped second guiding surface 41, and the second guiding surface 41 cooperates with the first guiding surface 36 to realize the angle adjustment of the tool holder 4; the angle reference line 42 is arranged close to the second guiding surface 41.

[0049] The tool holder 4 and the guide bar 3 are fixedly connected by a bolt and nut assembly located in the tool holder connection hole 35 and the tool bar connection hole 44. When the tool holder 4 needs to be adjusted, the bolt that fixedly connects the tool holder 4 and the guide bar 3 is loosened slightly but still maintained in the connected state, and then the tool holder 4 is manually rotated with the tool holder connection hole 35 as the base point, so as to achieve the purpose of adjusting the angle.

[0050] An auxiliary locking member 32 is also provided on the tool bar 3. After the tool holder 4 is adjusted, the auxiliary locking member 32 presses the tool holder 4. Specifically, the auxiliary locking member 32 is a bolt, and a threaded hole is provided on the tool bar 3, and the threaded hole is adjacent to the angle scale 33; the auxiliary locking member 32 is connected to the threaded hole.

[0051] When the tool is in use,

[0052] According to the drawing of the part to be machined, the tool holder 4 is adjusted to the correct angle. The allowable angle adjustment range of the tool is subject to the tool in actual application, for example, 0° to 90°;

[0053] According to the requirement of the R arc size in the drawing, a blade 6 with a suitable R angle is selected and installed in the blade chamber 43;

[0054] The tool bar 3 is controlled to move along the first guiding structure 21 through the diameter fine adjustment mechanism 5, so as to achieve the purpose of adjusting the diameter of the tool and ensure that tools of various diameters are applicable.

[0055] If the taper chamfer and R arc chamfer designed for the machined part are changed, only the angle of the tool holder 4 needs to be adjusted and the blade 6 needs to be replaced; the product can be machined in one go for multiple dimensions, effectively improving the machining efficiency and ensuring the machining accuracy requirements of the product.

[0056] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cutting tool for machining, comprising a tool shank (3), a tool holder (4) and a cutting blade (6), wherein the cutting blade (6) is arranged on the tool holder (4), and the tool holder (4) is connected to the tool shank (3); characterized in that, It further includes a base tool bridge (1), a guiding backing plate (2), and a diameter fine-tuning mechanism (5); The base tool bridge (1) is used to connect the tool shank; The guiding backing plate (2) is fixedly installed on the base tool bridge (1); an installation chamber is formed between the butt joint surfaces of the guiding backing plate (2) and the base tool bridge (1), and an adjusting through hole (23) is provided on the tool shank connecting surface of the guiding backing plate (2) corresponding to the position of the diameter fine-tuning mechanism (5). The adjusting through hole (23) is a long hole and communicates with the installation chamber; the length direction of the adjusting through hole (23) is consistent with the moving direction of the tool shank (3); The diameter fine-tuning mechanism (5) is fixedly installed in the installation chamber; The tool shank (3) is slidably arranged on the guiding backing plate (2), and the diameter fine-tuning mechanism (5) and the tool shank (3) are connected by a connecting piece located in the adjusting through hole (23); under the control of the diameter fine-tuning mechanism (5), the tool shank (3) slides relative to the guiding backing plate (2) to change the diameter of the tool.

2. The cutting tool for machining according to claim 1, characterized in that, A first guiding structure (21) is provided on the tool shank connecting surface of the guiding backing plate (2), and a second guiding structure (34) is provided on the side surface of the tool shank (3) facing the guiding backing plate (2). Both the first guiding structure (21) and the second guiding structure (34) include a plurality of convex parts arranged parallel to each other and at intervals, and a concave part is formed between two adjacent convex parts; the convex parts and the concave parts of the second guiding structure (34) are respectively butted against the concave parts and the convex parts of the first guiding structure (21) to jointly guide the sliding of the tool shank (3).

3. A cutting tool for machining according to claim 1, characterized in that, The tool holder (4) can rotate relative to the tool shank (3) to adjust the cutting angle of the cutting blade (6).

4. A cutting tool for machining according to claim 3, characterized in that, An angle scale (33) is provided on the tool shank (3), and an angle reference line (42) is provided on the tool holder (4). The angle reference line (42) and the angle scale (33) cooperate to mark the rotation angle of the tool holder (4).

5. A cutting tool for machining according to claim 3, characterized in that The tool shank (3) is provided with a tool holder connecting part (37) for connecting the tool holder (4); the tool holder connecting part (37) is concave towards the tool shank (3), and a circular arc-shaped first guiding surface (36) is formed on one side of the tool holder connecting part (37). The first guiding surface (36) is coaxial with the rotation center of the tool holder (4); the side surface of the tool holder (4) corresponding to the first guiding surface (36) is a circular arc-shaped second guiding surface (41). The second guiding surface (41) and the first guiding surface (36) jointly guide the rotation of the tool holder (4).

6. The cutting tool for machining according to claim 3, characterized in that, An auxiliary locking part (32) is further provided on the tool shank (3). The auxiliary locking part (32) is threadedly connected to the tool shank (3) and partially extends to the tool holder (4) and presses on the tool holder (4).

7. A cutting tool for machining according to claim 1, characterized in that, The tool holder (4) is provided with a cutting blade chamber (43), and the cutting blade (6) is installed in the cutting blade chamber (43).

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