High pressure fluid driven deployable cutter

Abstract

The application provides a high-pressure fluid-driven unfolding cutter, which comprises a cutter handle, a pressurizing part, a plug assembly and a cutting part. The pressurizing part is arranged in the cutter handle. The cutter handle is provided with an expansion area, and the expansion area is communicated with the pressurizing part. The pressurizing part is used for injecting fluid into the expansion area. The plug assembly is arranged in the expansion area and can slide in the expansion area. The cutting part is arranged on one side of the plug assembly and is arranged on the cutter handle. The cutting part can move in the radial direction relative to the cutter handle. The plug assembly is used for driving the cutting part to move in the radial direction after the fluid is injected. The high-pressure fluid-driven unfolding cutter solves the problem that the cutter only jumps over the top of the boss to process the surface to be processed of the workpiece in the prior art because the cutter is only linearly driven and driven to rotate.

Description

Technical Field

[0001] This invention relates to cutting tools, and more specifically to a high-pressure fluid-driven unfolding cutting tool. Background Technology

[0002] like Figure 1 As shown, the workpiece 5 to be processed includes: a body, with a boss protruding from the outer wall of the body, and the bottom of the boss is the surface to be processed 50. The surface to be processed 50 needs to be processed using a cutting tool to improve the accuracy of the surface to be processed 50.

[0003] In the prior art, the tool processing equipment includes: a linear drive device, a mounting base, a rotary drive device, and a tool. The output end of the linear drive device is connected to the mounting base, the mounting base is connected to the rotary drive device, and the output end of the rotary drive device is connected to the tool. During processing, the linear drive device drives the mounting base, the rotary drive device, and the tool to move, so that the tool extends into the position to be processed. Then, the rotary drive device drives the tool to rotate, thereby realizing operations such as turning and boring.

[0004] Although the above-mentioned tool processing equipment can achieve the processing purpose, there is still a problem: because the linear drive device drives the tool in a linear drive, the top of the boss blocks the tool, so it is difficult for the tool to extend to the surface 50 of the workpiece 5 to be processed, and the surface 50 of the workpiece 5 to be processed cannot be processed, thus failing to meet the requirements. Summary of the Invention

[0005] The present invention provides a high-pressure fluid-driven unfolding tool to solve the problem in the prior art where the tool is only driven linearly and rotated, causing it to jump over the top of the boss to machine the surface of the workpiece.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a high-pressure fluid-driven unfolding cutting tool, comprising: a tool holder, a pressurizing part, a plug assembly, and a cutting part. The tool holder is provided with a pressurizing part and a telescopic area connected to the pressurizing part. The pressurizing part is used to inject fluid into the telescopic area. The plug assembly is installed in the telescopic area and can slide within the telescopic area. A cutting part is provided on one side of the plug assembly and is installed on the tool holder. The cutting part can move radially relative to the tool holder. The plug assembly is used to drive the cutting part to move radially after fluid is injected.

[0007] Preferably, the cutting part includes: a pushing block and a cutting assembly. The pushing block is installed in the side wall of the tool holder and can move radially relative to the tool holder. One end of the pushing block is in contact with the plug assembly and can be pushed by the plug assembly to a side away from the axis of the tool holder. The other end of the pushing block is connected to one end of the cutting assembly. The middle part of the cutting assembly is hinged to the tool holder, and the other end of the cutting assembly is the cutting execution point.

[0008] Preferably, the plug assembly includes a drive piston and a return spring. The drive piston is located in the telescopic zone and can move relative to the tool holder in the axial direction. The outer wall of the drive piston is used to push the push block. A return spring is installed at the drive piston and is used to lift the drive piston.

[0009] Preferably, a screw plug is threaded to the bottom of the tool holder, the screw plug is located at the bottom of the telescopic area, an adjuster is installed on the screw plug, the adjuster moves under the guidance of the screw plug, the top of the adjuster supports the drive piston, a return spring is located between the screw plug and the drive piston, and a vent hole is opened on the screw plug to connect the bottom of the drive piston with the outside.

[0010] Preferably, the regulator is provided with a first support surface, and the inner wall of the screw plug is provided with a second support surface, the second support surface being used to limit the descent of the regulator by supporting the first support surface.

[0011] Preferably, a push-open spring is installed between the cutting assembly and the handle, and the push-open spring is located below the hinge of the cutting assembly.

[0012] Preferably, a first pushing surface is formed on the side wall of the drive piston, and the angle between the first pushing surface and the axis of the tool holder is an acute angle. A second pushing surface is provided on the pushing block, and the first pushing surface is used to push the pushing block to move radially by pushing the second pushing surface.

[0013] Preferably, the cutting assembly includes a rotating arm and a cutter head. The middle part of the rotating arm is hinged to the cutter handle. One end of the rotating arm is used to be in close contact with the push block, and the other end of the rotating arm is equipped with a cutter head, which is the cutting execution point of the cutting assembly.

[0014] Preferably, the pressurizing part includes: a fluid pipe connection channel and a fluid injection channel. The fluid pipe connection channel is formed at the top of the tool holder. The fluid pipe connection channel is connected to an external fluid driving device, and the fluid injection channel is used to connect to the telescopic zone.

[0015] Preferably, the high-pressure fluid-driven unfolding cutter is installed in a tool processing equipment, which further includes a linear drive device, a mounting base, and a rotary drive device. The output end of the linear drive device is connected to the mounting base, and the rotary drive device is connected to the mounting base. The output end of the rotary drive device is connected to the high-pressure fluid-driven unfolding cutter. The tool processing equipment processes the workpiece according to the following steps: S1, the linear drive device drives the mounting base, the rotary drive device, and the high-pressure fluid-driven unfolding cutter to move, so that the bottom end of the cutting part of the high-pressure fluid-driven unfolding cutter is located next to the surface to be processed on the workpiece; S2, the external fluid drive device injects fluid into the telescopic area through the drive unit, driving the plug assembly to move. The plug assembly pushes the cutting part to move radially, so that the bottom end of the cutting part moves radially in the tool holder, and the bottom end of the cutting part is in close contact with the surface to be processed on the workpiece; S3, the rotary drive device drives the high-pressure fluid-driven unfolding cutter to rotate, and the bottom end of the cutting part processes the surface to be processed on the workpiece.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In this application, by setting up a pressurization section, the external fluid driving device (which can be a water pump or air pump, etc.) is connected to the telescopic area inside the tool holder, thus laying the foundation for the external fluid driving device to inject fluid into the telescopic area. Then, the cutting section is set to be able to move radially in the tool holder, thereby realizing that the external fluid driving device injects fluid and drives the plug assembly to drive the cutting section to move radially in the tool holder. This avoids the original linear drive device driving high pressure fluid to drive the unfolded tool to move linearly, which would prevent it from jumping over the top of the boss of the workpiece. This allows the bottom end of the cutting section to extend into the workpiece to be machined. The workpiece to be machined is an irregular shape composed of two tangent arcs. Therefore, it is necessary to add a fluid-driven piston assembly to move and then drive the cutting section to move radially in the tool holder.

[0017] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the part to be processed.

[0019] Figure 2 This is a schematic diagram of a high-pressure fluid-driven unfolding cutter.

[0020] Figure 3 A cross-sectional view of a high-pressure fluid-driven unfolding cutter.

[0021] Reference numerals: 1. Tool holder; 11. Plug; 2. Pressurizing part; 21. Fluid pipe connection channel; 22. Fluid injection channel; 3. Plug assembly; 31. Drive piston; 32. Return spring; 33. Adjuster; 4. Cutting part; 41. Push block; 42. Cutting assembly; 42. Rotating arm; 421. Tool head; 422. Push-open spring; 43. Workpiece to be processed; 5. Surface to be processed; 50. Detailed Implementation

[0022] To make the technical means, creative features, objectives, and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments: like Figure 2 as well as Figure 3 As shown, the present invention provides a high-pressure fluid-driven unfolding cutting tool, comprising: a tool holder 1, a pressurizing part 2, a plug assembly 3, and a cutting part 4. The tool holder 1 is provided with a pressurizing part 2, and the tool holder 1 has a telescopic area that communicates with the pressurizing part 2. The pressurizing part 2 is used to inject fluid into the telescopic area. The plug assembly 3 is installed in the telescopic area and can slide within the telescopic area. The cutting part 4 is provided on one side of the plug assembly 3 and is installed on the tool holder 1. The cutting part 4 can move radially relative to the tool holder 1. The plug assembly 3 is used to drive the cutting part 4 to move radially after the fluid is injected.

[0023] The cutting section 4 includes a pushing block 41 and a cutting assembly 42. The pushing block 41 is installed in the side wall of the tool holder 1 and can move radially relative to the tool holder 1. One end of the pushing block 41 contacts the plug assembly 3 and can be pushed by the plug assembly 3 to a side away from the axis of the tool holder 1. The other end of the pushing block 41 is connected to one end of the cutting assembly 42. The middle part of the cutting assembly 42 is hinged to the tool holder 1, and the other end of the cutting assembly 42 is the cutting execution point. This enables the plug assembly 3 to push the pushing block 41 to move radially. The cutting assembly 42 is rotary, which allows the cutting assembly 42 to have radial and axial movement. This allows the cutting execution point (also the bottom end of the cutting section 4) in the cutting assembly 42 to fit against the surface 50 of the workpiece 5 to be processed, so that the cutting execution point in the cutting assembly 42 can fully process the irregular surface 50 to be processed.

[0024] The plug assembly 3 includes a drive piston 31 and a return spring 32. The drive piston 31 is located within the telescopic zone and can move relative to the tool holder 1 in the axial direction. The outer wall of the drive piston 31 is used to push the push block 41. The return spring 32 is installed at the drive piston 31 and is used to raise the drive piston 31. The drive piston 31 is similar to the piston in a hydraulic cylinder or pneumatic cylinder, dividing the telescopic zone into an upper half and a lower half. The return spring 32 ensures that when no fluid is injected, the drive piston 31 returns to a position where it does not press against the push block 41.

[0025] A screw plug 11 is threaded to the bottom of the tool holder 1. The screw plug 11 is located at the bottom of the telescopic area. An adjuster 33 is installed on the screw plug 11. The adjuster 33 moves under the guidance of the screw plug 11. The top of the adjuster 33 supports the drive piston 31. A return spring 32 is located between the screw plug 11 and the drive piston 31. A vent hole is opened on the screw plug 11 to connect the bottom of the drive piston 31 to the outside. The screw plug 11 has the function of sealing the telescopic area and also installs the drive piston 31, adjuster 33 and return spring 32 in place.

[0026] The regulator 33 is provided with a first support surface, and the inner wall of the screw plug 11 is provided with a second support surface. The second support surface is used to limit the descent of the regulator 33 by supporting the first support surface. The cooperation of the first and second support surfaces prevents the regulator 33 from leaving the telescopic zone. At the same time, since the rotation angle of the cutting assembly 42 directly affects the position of the cutting execution point in the cutting assembly 42, it is very important to limit the descent height of the regulator 33 and the drive piston 31. In order to adapt to the position of the surface to be processed 50 in the workpiece 5, it is necessary to adjust the relative position of the screw plug 11 and the tool holder 1. At the same time, the positions of the first and second support surfaces can also be adjusted so that the cutting execution point in the cutting assembly 42 is in close contact with the surface to be processed 50 in the workpiece 5, ensuring that the cutting execution point in the cutting assembly 42 (i.e., the cutter head 422) can fully cut the surface to be processed 50 and ensure the cutting quality of the surface to be processed 50.

[0027] A push-open spring 43 is installed between the cutting assembly 42 and the tool holder 1, and the push-open spring 43 is located below the hinge of the cutting assembly 42. The push-open spring 43 ensures that when not pushed by the piston assembly, the cutting execution part in the cutting assembly 42 will not collide with the top of the boss of the workpiece 5, thus avoiding damage to the tool head 422.

[0028] A first pushing surface is formed on the side wall of the drive piston 31, and the angle between the first pushing surface and the axis of the tool holder 1 is an acute angle. A second pushing surface is provided on the push block 41. The first pushing surface is used to push the push block 41 to move radially by pushing the second pushing surface. The inclined arrangement of the first and second pushing surfaces enables the drive piston 31 located in the axis direction to push the push block 41 to move radially.

[0029] The cutting assembly 42 includes a rotating arm 421 and a cutter head 422. The middle part of the rotating arm 421 is hinged to the handle 1. One end of the rotating arm 421 is used to be in close contact with the push block 41. The other end of the rotating arm 421 is equipped with the cutter head 422, which is the cutting execution point of the cutting assembly 42.

[0030] The pressurizing part 2 includes a fluid pipe connection channel 21 and a fluid injection channel 22. The fluid pipe connection channel 21 is formed at the top of the handle 1. The fluid pipe connection channel 21 is connected to an external fluid driving device, and the fluid injection channel 22 is used to connect to the telescopic area.

[0031] The high-pressure fluid-driven unfolding tool is installed in a tool processing equipment. The tool processing equipment also includes a linear drive device, a mounting base, and a rotary drive device. The output end of the linear drive device is connected to the mounting base, the mounting base is connected to the rotary drive device, and the output end of the rotary drive device is connected to the high-pressure fluid-driven unfolding tool. The cutting tool processing equipment processes the workpiece 5 according to the following steps: S1, the linear drive device drives the mounting base, the rotary drive device, and the high-pressure fluid-driven unfolding tool to move, so that the bottom end of the cutting part 4 of the high-pressure fluid-driven unfolding tool is located next to the surface 50 to be processed on the workpiece 5. During this process, the piston 31 is driven to a high position under the elastic force of the return spring 32, and the bottom end of the cutting part 4 moves away from the surface 50 to be processed on the workpiece 5 under the elastic force of the push-away spring 43; S2, the external fluid drive device injects fluid into the telescopic area through the drive unit, drives the plug assembly 3 to move, and the plug assembly 3 pushes the cutting part 4 to move radially, so that the bottom end of the cutting part 4 moves radially in the tool holder 1, and the bottom end of the cutting part 4 is in close contact with the surface 50 to be processed on the workpiece 5; S3, the rotary drive device drives the high-pressure fluid-driven unfolding tool to rotate, and the bottom end of the cutting part 4 processes the surface 50 to be processed on the workpiece 5.

[0032] In this application, firstly, to enable the drive cutting section 4 to move radially, a pressurizing section 2, a telescopic zone, and a plug-type assembly 3 are designed. Secondly, since the tool holder 1 needs to rotate, and the pressurizing section 2 can also rotate relative to the external fluid drive device, the fluid pipe connection channel 21 is designed to be symmetrical along the axis, so that the fluid pipe connection channel 21 can rotate relative to the external fluid drive device. This allows the tool holder 1 to rotate relative to the external fluid drive device, thereby enabling the drive piston 31 to move along the axis, but not in the radial direction. Thirdly, to enable the drive piston 31 to drive the cutting assembly 42 in the cutting section 4 to move radially, a second pushing surface on the push block 41 is provided to interact with the drive piston. The first pushing surface of the piston 31 engages, thereby enabling the drive head 422 to move radially. Simultaneously, the entire cutting assembly 42 is designed to rotate, allowing the drive head 422 to closely contact the surface 50 to be processed, which is positioned downwards. This lays the first condition for the drive head 422 to fully process the surface 50. Finally, to ensure the drive head 422 can fully process the surface 50 and to control the processing depth, the lowering height of the drive piston 31 needs to be controlled. Therefore, the heights of the first and second support surfaces on the adjuster 33 are adjustable, and the height of the screw plug 11 is also adjustable. This controls the rotation angle of the cutting assembly 42, the processing depth of the drive head 422, and ensures product quality.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-pressure fluid-driven unfolding cutting tool, characterized in that, include: The tool holder includes a pressure section, a plug assembly, and a cutting section. The pressure section is located inside the tool holder, and the tool holder has a telescopic area that connects to the pressure section. The pressure section is used to inject fluid into the telescopic area, and a plug assembly is installed inside the telescopic area. The plug assembly can slide within the telescopic area. The plug assembly has a cutting part on one side, which is mounted on the tool holder. The cutting part can move radially relative to the tool holder. The plug assembly is used to drive the cutting part to move radially after fluid is injected. The cutting section includes: a push block and a cutting assembly. The push block is installed in the side wall of the tool holder and can move radially relative to the tool holder. One end of the push block is in contact with the plug assembly and can be pushed by the plug assembly to a side away from the axis of the tool holder. The other end of the push block is connected to one end of the cutting assembly. The middle part of the cutting assembly is hinged to the tool holder, and the other end of the cutting assembly is the cutting execution point. The plug assembly includes a drive piston and a return spring. The drive piston is located in the telescopic zone and can move relative to the tool holder in the axial direction. The outer wall of the drive piston is used to push the push block. A return spring is installed at the drive piston and is used to lift the drive piston. The pressurization section includes a fluid pipe connection channel and a fluid injection channel. A fluid pipe connection channel is formed at the top of the tool holder. The fluid pipe connection channel is connected to an external fluid drive device. The fluid injection channel is used to connect the telescopic zone.

2. The high-pressure fluid-driven unfolding cutter according to claim 1, characterized in that, A screw plug is threaded to the bottom of the tool holder. The screw plug is located at the bottom of the telescopic area. An adjuster is installed on the screw plug. The adjuster moves under the guidance of the screw plug. The top of the adjuster supports the drive piston. A return spring is located between the screw plug and the drive piston. A vent hole is opened on the screw plug to connect the bottom of the drive piston with the outside.

3. The high-pressure fluid-driven unfolding cutter according to claim 2, characterized in that, The regulator is provided with a first support surface, and the inner wall of the screw plug is provided with a second support surface. The second support surface is used to limit the descent of the regulator by supporting the first support surface.

4. The high-pressure fluid-driven unfolding cutter according to claim 3, characterized in that, A push-open spring is installed between the cutting assembly and the handle, and the push-open spring is located below the hinge of the cutting assembly.

5. The high-pressure fluid-driven unfolding cutter according to claim 4, characterized in that, A first pushing surface is formed on the side wall of the drive piston. The angle between the first pushing surface and the axis of the tool holder is an acute angle. A second pushing surface is provided on the pushing block. The first pushing surface is used to push the pushing block to move radially by pushing the second pushing surface.

6. The high-pressure fluid-driven unfolding cutter according to claim 5, characterized in that, The cutting assembly includes a rotating arm and a cutter head. The middle part of the rotating arm is hinged to the cutter shank. One end of the rotating arm is used to fit tightly against the push block, and the other end of the rotating arm is equipped with a cutter head, which is the cutting execution point of the cutting assembly.

7. The high-pressure fluid-driven unfolding cutter according to any one of claims 1 to 6, characterized in that, The high-pressure fluid-driven unfolding tool is installed in a tool processing equipment. The tool processing equipment further includes a linear drive device, a mounting base, and a rotary drive device. The output end of the linear drive device is connected to the mounting base, and the rotary drive device is connected to the mounting base. The output end of the rotary drive device is connected to the high-pressure fluid-driven unfolding tool. The tool processing equipment processes the workpiece according to the following steps: S1. The linear drive device drives the mounting base, the rotary drive device, and the high-pressure fluid-driven unfolding cutter to move, so that the bottom end of the cutting part of the high-pressure fluid-driven unfolding cutter is located next to the surface to be processed on the workpiece. S2. The external fluid driving device injects fluid into the telescopic zone through the driving part, drives the plug assembly to move, and the plug assembly pushes the cutting part to move radially, so that the bottom end of the cutting part moves radially in the tool holder and the bottom end of the cutting part is in close contact with the surface to be processed of the workpiece. S3. The rotary drive device drives the high-pressure fluid to rotate the unfolded cutter, and the bottom end of the cutting part processes the surface to be processed of the workpiece.

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