Cutter structure and cutter system for turning cylinder

Abstract

The invention belongs to the field of machining, particularly relates to a cutter structure and a cutter system for turning a cylinder, and aims to solve the problem that the machining quality is poor when an existing cutter structure is used for machining a thin-walled cylinder. The cutter structure for turning the cylinder comprises a cutter sleeve and a cutter handle, wherein the cutter handle is inserted into the cutter sleeve and is detachably connected with the cutter sleeve; the cutter sleeve is installed on a lathe saddle. The blade is installed on the cutter handle. According to the cutter structure for turning the cylinder, the extension length of the cutter handle is adjustable through the inserting connection mode and the detachable connection mode of the cutter handle and the cutter sleeve, so that the cutter handle is matched with the length of the cylinder, an overlong cantilever is avoided during machining, and then the stability during cutting is guaranteed; the plunger pump part replacement frequency increase caused by machining surface roughness increase is avoided, and meanwhile the service life of a cutter is prevented from being shortened. And moreover, the detachable connection can replace the cutter handles with different sizes, so that the cutter handle with a large cross section area is selected as far as possible to improve the rigidity, reduce the vibration and improve the machining quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical processing, and particularly relates to a cutter structure and cutter system for turning a cylinder. BACKGROUND

[0002] The high-pressure plunger pump is a key equipment for conveying liquid (such as water, oil, chemical medium, etc.) and obtaining high-pressure energy in the petroleum, chemical, metallurgical, mining and other industries, and is mainly used in oil field water injection, boiler water supply, high-pressure cleaning, pipeline transportation and other scenes. As the main equipment for high-pressure water injection in oil fields, the power end is an important part of the plunger pump, which converts the rotary work of the motor into reciprocating motion of the plunger through the crankshaft, thereby converting kinetic energy into potential energy, achieving pressure boosting injection, driving the oil reservoir, and increasing the production of crude oil. At present, due to the change of injection demand in some oil fields, the requirements for the plunger pump are getting higher and higher. In order to reduce the replacement cost of the plunger pump, a cylinder liner is installed in the pump body cylinder. When scratches occur on the cylinder liner due to solid particles during the reciprocating motion of the cross head, the cylinder liner can be directly replaced. The cylinder liner is a thin-walled cylindrical part, and has high processing requirements.

[0003] In the prior art, the lathe tool bar is slender and is prone to bending deformation and vibration under the action of cutting force. Especially when machining a thin-walled cylinder such as a cylinder liner, vibration is easily generated due to poor rigidity of the part. This vibration can form vibration marks on the surface of the part, thereby increasing the surface roughness of the thin-walled cylinder, leading to processing defects of the thin-walled cylinder part, failing to meet the requirements of the plunger pump, and further increasing the frequency of replacing parts of the plunger pump. In addition, cutting vibration and chatter not only affect the surface quality of the workpiece, but also reduce the service life of the cutter. SUMMARY

[0004] In order to solve the above-mentioned problems in the prior art, i.e., the poor processing quality of the existing cutter structure when machining a thin-walled cylinder, the present application provides a cutter structure and cutter system for turning a cylinder.

[0005] In order to solve the above-mentioned technical problems, the technical scheme provided by the present application is as follows:

[0006] A cutter structure for turning a cylinder, comprising a cutter sleeve and a cutter handle, the cutter handle is inserted into the cutter sleeve and detachably connected with the cutter sleeve.

[0007] The cutter sleeve is installed on the lathe tool rest, and the cutter blade is installed on the cutter handle.

[0008] Further, the cutter structure for turning a cylinder further comprises a tightening screw, and the cutter sleeve is provided with a mounting through hole and a first threaded hole.

[0009] The cutter handle is inserted into the mounting through hole.

[0010] The top screw is installed in the first threaded hole and abuts against the tool shank.

[0011] Further, a plurality of first threaded holes are arranged along the length direction of the installation through hole on the tool sleeve.

[0012] Further, a second threaded hole is arranged on the tool sleeve, and the top screw is installed in the second threaded hole.

[0013] The first threaded hole and the second threaded hole are arranged along the circumference of the installation through hole.

[0014] Further, a plurality of second threaded holes are arranged along the length direction of the installation through hole on the tool sleeve.

[0015] Further, a U-shaped groove is arranged on the tool sleeve.

[0016] Further, the installation through hole is a circular hole, the tool shank is a circular rod, and the tool shank is provided with a first milling plane and a second milling plane.

[0017] The top screw installed in the first threaded hole abuts against the first milling plane.

[0018] The top screw installed in the second threaded hole abuts against the second milling plane.

[0019] Further, the tool shank is provided with an installation groove, and the blade is inserted into the installation groove.

[0020] Further, the material of the tool sleeve and the tool shank is 40Cr or 42CrMo.

[0021] In another aspect of the present application, a tool system for turning a cylinder is provided, which comprises the tool structure for turning a cylinder described above, and further comprises a blade and a tool pad.

[0022] In summary, the technical effects achieved by the present application are as follows:

[0023] The tool structure for turning a cylinder provided by the present application comprises a tool sleeve and a tool shank, the tool shank is inserted into the tool sleeve and detachably connected with the tool sleeve, the tool sleeve is installed on a lathe tool rest, and the blade is installed on the tool shank.

[0024] The tool structure for turning a cylinder provided by the application is connected through the plug-in connection mode of the tool handle and the tool sleeve and the detachable connection, so that the extension length of the tool handle can be adjusted to match the length of the cylinder, avoid the appearance of an overlong cantilever during machining, and further ensure the stability during cutting, avoid the increase of the replacement frequency of the plunger pump parts caused by the roughness of the machined surface, and simultaneously avoid the reduction of the tool life. Moreover, the detachable connection can replace the tool handle of different sizes, so that the tool handle with a large cross-sectional area is selected as much as possible to improve the rigidity, reduce the vibration, and improve the machining quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0026] Figure 1 The structural schematic diagram of the tool structure for turning a cylinder provided by the embodiment of the application is shown in the figure.

[0027] Figure 2 The bottom view of the tool sleeve is shown in the figure.

[0028] Figure 3 The left view of the tool handle is shown in the figure.

[0029] Figure 4 The bottom view of the tool handle is shown in the figure.

[0030] Figure legend: 100, tool sleeve; 110, mounting through hole; 120, first threaded hole; 130, second threaded hole; 200, tool handle; 210, first milling plane; 220, second milling plane; 230, mounting groove; 240, mounting threaded hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the application more clear, the technical solutions in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are some of the embodiments of the application, rather than all the embodiments. The components of the embodiments of the application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. All other embodiments obtained by those skilled in the art on the basis of the embodiments in the application without creative labor are within the scope of protection of the application.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] In existing technologies, lathe tool holders are slender and prone to bending and deformation under cutting forces, generating vibrations. This is especially true when machining thin-walled cylinders such as cylinder liners, where the poor rigidity of the parts makes them highly susceptible to vibration. This vibration forms chatter marks on the part's surface, increasing the surface roughness of the thin-walled cylinder and leading to machining defects. This results in parts that cannot meet the requirements of piston pumps, increasing the frequency of piston pump part replacements. Furthermore, cutting vibration and chatter marks not only affect the surface quality of the workpiece but also reduce tool life.

[0035] In view of this, the present invention provides a tool structure for turning cylinders, including a tool holder 100 and a tool shank 200, wherein the tool shank 200 is inserted into the tool holder 100 and detachably connected to the tool holder 100; the tool holder 100 is mounted on a lathe tool post, and the cutting insert is mounted on the tool shank 200.

[0036] The tool structure for turning cylinders provided by this invention, through the insert connection of the tool holder 200 and the tool sleeve 100 and its detachable connection, allows the extension length of the tool holder 200 to be adjustable, thereby matching the length of the cylinder. This avoids excessive cantilever during machining, ensuring cutting stability and preventing increased replacement frequency of plunger pump parts due to increased surface roughness, while also preventing a reduction in tool life. Furthermore, the detachable connection allows for the replacement of tool holders 200 of different sizes, enabling the selection of tool holders 200 with the largest possible cross-sectional area to improve rigidity, reduce vibration, and enhance machining quality.

[0037] The following combination Figures 1-3 The structure and shape of the cutting tool structure for turning cylinders provided in this embodiment will be described in detail:

[0038] In an optional embodiment, the tool structure for turning cylinders further includes a set screw. The tool holder 100 has a mounting through hole 110 and a first threaded hole 120. The tool shank 200 is inserted into the mounting through hole 110. The set screw is installed in the first threaded hole 120 and abuts against the tool shank 200. Specifically, the set screw can be a set screw, an external hex bolt, an internal hex bolt, etc.

[0039] Furthermore, to ensure reliable locking of the tightening screw, the tool structure for turning cylinders also includes a first nut. The first nut is fitted onto the tightening screw and threadedly connected to it, while simultaneously abutting against the surface of the tool holder 100. The tool holder 100 has a flat surface for abutting against the first nut, such as... Figure 2As shown, the surface of the tool pocket 100 where the first threaded hole 120 is formed is provided as a flat surface, or only the surface where the threaded hole is formed can be processed as a flat surface for cooperation with the first nut.

[0040] Further, the tool structure for turning a cylinder further comprises a second nut to further enhance the anti-loosening effect. The second nut is sleeved on the jam nut and threadedly connected with the jam nut, and the second nut abuts against one end of the first nut away from the tool pocket 100.

[0041] In an optional embodiment of the present embodiment, a plurality of first threaded holes 120 are formed on the tool pocket 100 in the length direction of the mounting through hole 110, thereby enhancing the fixation of the tool shank 200. Specifically, five first threaded holes 120 are uniformly distributed in the length direction of the mounting through hole 110.

[0042] In an optional embodiment of the present embodiment, a second threaded hole 130 is further formed on the tool pocket 100, and a jam screw is mounted on the second threaded hole 130; the first threaded hole 120 and the second threaded hole 130 are arranged at intervals in the circumferential direction of the mounting through hole 110, and the interval angle is 90°, for enhancing the fixation of the tool shank 200 and preventing loosening.

[0043] Similarly, in order to ensure reliable locking of the jam screw, the jam screw mounted on the second threaded hole 130 is also sleeved with a first nut and a second nut, the first nut is threadedly connected with the jam screw and abuts against the surface of the tool pocket 100, and the second nut is threadedly connected with the jam screw and abuts against one end of the first nut away from the tool pocket 100. The surface of the tool pocket 100 where the second threaded hole 130 is formed is provided as a flat surface, or only the surface where the threaded hole is formed can be processed as a flat surface for cooperation with the first nut.

[0044] In the present embodiment, a plurality of second threaded holes 130 are formed on the tool pocket 100 in the length direction of the mounting through hole 110, and specifically, five second threaded holes 130 are uniformly distributed in the length direction of the mounting through hole 110.

[0045] In an optional embodiment of the present embodiment, a U-shaped groove is formed on the tool pocket 100 for connection with the lathe tool holder, and the U-shaped groove can be clamped and limited to provide stability of the connection, as shown in Figure 1 As shown, the opening of the U-shaped groove faces right.

[0046] In the present embodiment, the mounting through hole 110 is a circular hole, the tool shank 200 is a circular rod and is provided with a first milling flat surface 210 and a second milling flat surface 220; the jam screw mounted on the first threaded hole 120 abuts against the first milling flat surface 210; and the jam screw mounted on the second threaded hole 130 abuts against the second milling flat surface 220, as shown in Figure 4 The first milling flat surface 210 and the second milling flat surface 220 increase the contact area with the end surface of the jam screw, thereby improving the stability of the fixation of the tool shank 200.

[0047] In the embodiment, the first threaded hole 120 and the second threaded hole 130 are arranged around the axis of the mounting through hole 110 and are spaced 90°, and the axes of the first threaded hole 120 and the second threaded hole 130 are perpendicular to the axis of the mounting through hole 110, as shown in the figure. Figure 2

[0048] In the embodiment, the shank 200 is provided with a mounting groove 230, and the insert is inserted into the mounting groove 230, as shown in the figure. Figure 3 Further, the first milling plane 210 is provided with a mounting threaded hole 240, which is in communication with the mounting groove 230, for mounting a screw to fix the insert.

[0049] In the embodiment, the materials of the sleeve 100 and the shank 200 are 40Cr, 42CrMo, etc.

[0050] The cutter structure for turning a cylinder provided in the embodiment is realized by abutting the shank 200 against the screw, the length of the shank 200 extending out of the sleeve 100 can be adjusted arbitrarily, which can accurately match the processing requirements, avoid excessive extension, reduce the influence of the cantilever structure, ensure stability, effectively resist deformation caused by cutting force, reduce the generation of vibration, meet the strict requirements of the processing precision of the thin-walled cylindrical part, and ensure the quality and performance of the part. In large excess cutting, the stable cutting state can be maintained, the problems such as the increase of surface roughness and size out-of-tolerance caused by vibration are avoided, and the size precision and surface quality of the processed part meet the design requirements.

[0051] The cutter structure for turning a cylinder provided in the embodiment is easy to install, the bolt hole of the sleeve 100 is used to adjust the extension length of the shank 200 according to the length of the thin-walled cylindrical part, the lengthened and thickened shank 200 reduces the generation of vibration, maintains a stable cutting state, avoids problems such as the increase of surface roughness and size out-of-tolerance caused by vibration, ensures that the size precision and surface quality of the processed part meet the design requirements, improves the product quality of the thin-walled cylindrical part, and further reduces the operation and maintenance cost of the plunger pump. In addition, the cutter structure has a stable cutting state, reduces the frequency of cutter wear and failure, reduces the time of machine tool maintenance and tool replacement, and further improves the processing efficiency of the thin-walled cylindrical part.

[0052] The use method of the cutter structure for turning a cylinder provided in the embodiment is as follows:

[0053] First, the sleeve 100 is fixed on the lathe tool holder, then the shank 200 is installed, and after the machine clamp turning tool is installed on the shank 200, the appropriate extension length of the shank 200 is adjusted according to the processing length of the thin-walled cylindrical part, the thin-walled cylindrical part is fixed by a special clamp, and the lathe is started to begin processing. ​

[0054] Based on the cutter structure for turning a cylinder provided in the embodiment, a cutter system for turning a cylinder is provided, which comprises the cutter structure for turning a cylinder described above, and further comprises a blade and a cutter pad; the cutter pad is arranged between the blade and the cutter handle 200, and fastens the blade and the cutter pad through screws.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tool structure for turning a cylinder, characterized in that, The tool structure comprises a tool holder (100) and a tool shank (200), the tool shank (200) is inserted into the tool holder (100) and detachably connected with the tool holder (100); The tool holder (100) is installed on a lathe tool rest, and a blade is installed on the tool shank (200).

2. The tool structure for turning a cylinder according to claim 1, wherein The tool holder (100) is further provided with a mounting through hole (110) and a first threaded hole (120); The tool shank (200) is inserted into the mounting through hole (110); The tool holder (100) is further provided with a second threaded hole (130), and the second threaded hole (130) is provided with the tightening screw; 3. The tool structure for turning a cylinder according to claim 2, wherein The first threaded hole (120) and the second threaded hole (130) are arranged along the circumference of the mounting through hole (110).

4. The tool structure for turning a cylinder according to claim 2, wherein The tool holder (100) is further provided with a second threaded hole (130), and the second threaded hole (130) is provided with the tightening screw; The first threaded hole (120) and the second threaded hole (130) are arranged along the circumference of the mounting through hole (110).

5. The tool structure for turning a cylinder according to claim 4, wherein The tool holder (100) is further provided with a second threaded hole (130), and the second threaded hole (130) is provided with the tightening screw; 6. The tool structure for turning a cylinder according to claim 4, wherein The tool holder (100) is provided with a U-shaped groove.

7. The tool structure for turning a cylinder according to claim 4, wherein The mounting through hole (110) is a circular hole, the tool shank (200) is a circular rod and is provided with a first milling plane (210) and a second milling plane (220); The tightening screw installed in the first threaded hole (120) abuts against the first milling plane (210); The tightening screw installed in the second threaded hole (130) abuts against the second milling plane (220).

8. The tool structure for turning a cylinder according to claim 7, wherein The tool shank (200) is provided with a mounting groove (230), and a blade is inserted into the mounting groove (230).

9. The tool structure for turning a cylinder according to claim 1, wherein The material of the tool holder (100) and the tool shank (200) is 40Cr or 42CrMo.

10. A tool system for turning a cylinder, characterized in that The tool structure for turning a cylinder comprises the tool holder (100) and the tool shank (200) as claimed in any one of claims 1-9, further comprising a blade and a tool pad, and the tool pad is arranged between the blade and the tool shank (200).

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