Thin-wall long barrel inner hole cutting machining tool

Abstract

The utility model relates to a thin-wall long cylinder inner hole cutting machining tool which comprises a holding cylinder, a locking piece and a center frame sleeve, the holding cylinder is a cylindrical part and used for holding the outer circle of a thin-wall cylinder, the length of the holding cylinder is larger than or equal to that of the thin-wall cylinder, the holding cylinder wraps the outer circle of the thin-wall cylinder in the length direction, and the center frame sleeve is provided with a containing cavity. The holding cylinder is inserted into the containing cavity, the center frame sleeve is matched with the outer circle of the holding cylinder and serves as a supporting position of the center frame during lathe machining, and the locking piece is arranged on the center frame sleeve in a penetrating mode and fastens the holding cylinder. The thickness of the stress surface of the thin-walled cylinder can be increased, stress deformation during cutting of the inner hole of the thin-walled cylinder is restrained, and the cutting quality of the inner hole of the thin-walled cylinder is stable during production; the method is not limited by factors such as the wall thickness and the length of the thin-wall cylinder, is particularly suitable for batch machining of thin-wall cylinders limited by equipment capacity, and can improve the stability of product quality during batch machining.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing and manufacturing of parts, in particular to a tool for cutting and processing inner holes of thin-walled elongated cylinders. Background Art

[0002] At present, the inner hole of general cylindrical parts is formed by turning or deep hole boring. When clamping, the parts are directly positioned according to their shape, which has certain requirements on the wall thickness of the parts. If the parts are too thin, they will not be rigid enough and will be deformed during clamping. When cutting, the parts will not be stressed and will be prone to vibration and deformation. The existing tooling structures for processing the inner holes of thin-walled cylinders are generally complex, and the use cost is high for the diversity of single-piece and small-batch products. Utility Model Content

[0003] In order to solve the problems of the prior art, the utility model provides a thin-walled elongated cylinder inner hole cutting tool which can restrain the stress deformation during the thin-walled cylinder inner hole cutting process and ensure the stable quality of the thin-walled cylinder inner hole cutting process during production.

[0004] The specific technical scheme is as follows: a tool for cutting the inner hole of a thin-walled elongated cylinder, including a clamping cylinder, a locking piece and a center frame sleeve. The clamping cylinder is a cylindrical part, which is used to clamp the outer circle of the thin-walled cylinder. The length of the clamping cylinder is greater than or equal to the length of the thin-walled cylinder. The clamping cylinder wraps the outer circle of the thin-walled cylinder in the length direction. The center frame sleeve has an accommodating cavity. The clamping cylinder is inserted in the accommodating cavity. The center frame sleeve cooperates with the outer circle of the clamping cylinder and serves as a support position for the center frame during lathe processing. The locking piece is passed through the center frame sleeve and tightens the clamping cylinder.

[0005] In some embodiments, the embracing tube includes at least two arc-shaped portions, which are arranged around the embracing tube axis and tightly embrace the thin-walled tube body.

[0006] In some embodiments, the wall thickness of the tube is greater than or equal to 10 mm.

[0007] In some embodiments, a plurality of locking holes are provided on the peripheral side of the central frame sleeve, the locking holes are arranged around the central axis of the central frame sleeve, and the locking members are passed through the locking holes.

[0008] In some embodiments, a receiving cavity is provided at one end of the central frame sleeve, and a connecting portion is provided at the other end.

[0009] In some embodiments, the length of the center frame sleeve is greater than the width of the lathe center frame, and the length of the center frame sleeve is greater than or equal to one quarter of the length of the barrel.

[0010] In some embodiments, the locking member includes an end portion and a screw portion connected to the end portion, the end portion includes a fitting joint, a sleeve is provided on the outside of the fitting joint, and a gap is provided between the sleeve and the fitting joint.

[0011] In some embodiments, the end portion is provided with an annular groove, and a gasket is provided in the annular groove.

[0012] In some embodiments, the sleeve is made of anti-corrosion material.

[0013] In some embodiments, the holding tube and the center frame sleeve are made of 45 steel.

[0014] The technical effect of the utility model is as follows: a thin-walled elongated cylinder inner hole cutting processing tooling of the utility model increases the thickness of the stress-bearing surface of the thin-walled cylinder part, restrains the stress deformation during the thin-walled cylinder inner hole cutting processing, and makes the thin-walled cylinder inner hole cutting processing quality stable during production; it is not limited by factors such as the wall thickness and length of the thin-walled cylinder part, is particularly suitable for batch thin-walled cylinder processing limited by equipment capacity, and can improve the stability of product quality during batch processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a tooling for cutting inner holes of a thin-walled elongated cylinder according to an embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of a holding tube according to an embodiment of the utility model.

[0017] Figure 3 It is a cross-sectional view of the holding tube according to an embodiment of the utility model.

[0018] Figure 4 It is a schematic diagram of a center frame sleeve according to an embodiment of the utility model.

[0019] Figure 5 It is a cross-sectional view of the center frame sleeve of the embodiment of the utility model.

[0020] Figure 6 It is a schematic diagram of a locking member according to an embodiment of the utility model.

[0021] Figure 7 It is another schematic diagram of the locking member of the embodiment of the utility model.

[0022] Figure 8 It is a cross-sectional view of the locking member of the embodiment of the utility model. DETAILED DESCRIPTION

[0023] The essential features and advantages of the present invention are further described below in conjunction with examples, but the present invention is not limited to the examples listed.

[0024] like Figures 1 to 5As shown, a tooling for cutting inner holes of thin-walled elongated cylinders in this embodiment includes a clamping tube 1, a locking member 2 and a center frame sleeve 3. The clamping tube 1 is a cylindrical part. The clamping tube 1 is used to clamp the outer circle of the thin-walled cylinder 4. The length of the clamping tube 1 is greater than or equal to the length of the thin-walled cylinder 41. The clamping tube 1 wraps the outer circle of the thin-walled cylinder 41 in the length direction. The thickness of the clamping tube is an extension of the thickness of the force-bearing surface of the thin-walled cylinder 4. The clamping tube 1 completely wraps the outer circle of the thin-walled cylinder 4, which can constrain the stress deformation during the cutting of the inner hole of the thin-walled cylinder 4. The center frame sleeve 3 has a receiving cavity 31, and the clamping tube 1 is inserted into the receiving cavity 31. The center frame sleeve 3 cooperates with the outer circle of the clamping tube 1 to serve as a support position for the center frame during lathe processing. The locking member is inserted into the center frame sleeve 3 and tightens the clamping tube 1, thereby locking the clamping tube 1. In the above technical scheme, the manufacturing of the holding tube uses universal 45 steel, and the inner hole is honed to control the cylindricity of the inner hole to achieve grade 7 accuracy; then, the outer circle of the holding tube is positioned after fine processing, and the cylindricity of the outer circle is ground to achieve grade 7 accuracy, and the coaxiality of the outer circle relative to the inner hole is controlled to achieve grade 7 accuracy. The locking member 2 can be a bolt, which is used to fix the center frame sleeve 3 on the holding tube 1. The center frame sleeve 3 uses universal 45 steel; the inner hole is turned to size, and the inner hole size is controlled to have a gap of 0.2mm-0.6mm with the outer circle of the holding tube. If the gap is too small, it is not suitable for assembly, and if the gap is too large, the center frame sleeve will be worn too quickly; the outer circle is turned to size, and the thickness is controlled to be ≥10mm; finally, bolt through holes are symmetrically processed on the outer circle circumference of both ends of the center frame sleeve for bolt connection. Through the above technical scheme, the thickness of the stress-bearing surface of the thin-walled cylinder is increased, and the stress deformation during the cutting of the inner hole of the thin-walled cylinder is restrained, so that the cutting quality of the inner hole of the thin-walled cylinder during production is stable; it is not limited by factors such as the wall thickness and length of the thin-walled cylinder, and is particularly suitable for batch processing of thin-walled cylinders limited by equipment capacity, and can improve the stability of product quality during batch processing; the material of the parts is 45 steel, which is a conventional material with strong versatility.

[0025] In this embodiment, the holding tube 1 includes at least two arc-shaped parts 11, which are arranged around the holding tube axis 10, and the arc-shaped parts 11 hold the thin-walled cylinder 41 tightly. In this embodiment, the holding tube 1 is broken into two symmetrical arc-shaped parts 11, which are used to hold the outer circle of the thin-walled cylinder. The thick wall of the holding tube is greater than or equal to 10 mm, so that the holding tube can not be easily deformed during processing. The peripheral side of the center frame sleeve 3 is provided with a plurality of lock holes 31, and the lock holes 31 are arranged around the central axis 30 of the center frame sleeve 3. The locking member 2 is penetrated in the lock holes 31, and the locking member 2 is threadedly connected with the lock holes 31, which can facilitate the tightening or release of the locking member 2. The center frame sleeve 3 is provided with a receiving cavity 31 at one end, and a connecting part 32 is provided at the other end, and the center frame sleeve 3 can be conveniently connected to the processing machine tool through the connecting part 32. The length of the center frame sleeve 3 is greater than the width of the lathe center frame, and the length of the center frame sleeve 3 is greater than or equal to one quarter of the length of the holding tube 1, so that the connection is more stable.

[0026] When assembling the tooling for cutting the inner hole of a thin-walled long cylinder of this embodiment, firstly, the two halves of the holding tube are tightly held on the outer circle of the thin-walled cylinder, and the outer circle of the thin-walled cylinder is fully covered in the length direction; then, the center frame sleeve 3 is put on the outer circle of the holding tube 1, and is fastened to the outer circle of the holding tube with 8 bolts. When in use, the inner hole of the thin-walled long cylinder is positioned, and the outer circle of the center frame sleeve is turned, so that the outer circle of the center frame sleeve is concentric with the inner hole of the thin-walled long cylinder, and then, one end of the part is clamped, and the center frame sleeve is assembled on the center frame, and the inner hole of the thin-walled long cylinder is turned, and the cutting fluid is continuously used to reduce the temperature during the process.

[0027] like Figures 6 to 8 As shown, in this embodiment, the locking member 2 includes an end portion 21 and a screw portion 22 connected to the end portion 21. The end portion 21 includes a fitting 23. A sleeve 24 is provided on the outside of the fitting 23. A gap 25 is provided between the sleeve 24 and the fitting 23. The fitting 23 is hexagonal. By inserting a tool into the gap 25 and cooperating with the fitting 23, the end portion 21 can be screwed to tighten or release the locking member. The sleeve 24 is made of an anti-corrosion material, such as plastic, and can protect the fitting 23. The end portion 21 is provided with an annular groove 211, and a gasket 5 is provided in the annular groove 211. After tightening, the sleeve 24 shields the gasket 5, improves the sealing performance, and can reduce the erosion of the gasket 5 by water vapor and the like, thereby extending its service life.

[0028] A thin-walled elongated cylinder inner hole cutting tool in the present embodiment has the following advantages: 1. The material of the parts is 45 steel, which is a conventional material with strong versatility; 2. The structure is simple, the manufacturing versatility is strong, and it is not limited by the equipment conditions of the production unit; 3. The design is ingenious and the design principle is clear. It is not limited by factors such as the wall thickness and length of the thin-walled cylinder. It is especially suitable for batch processing of thin-walled cylinders limited by equipment capacity, and can improve the stability of product quality during batch processing; 4. In view of the diversity of single-piece and small-batch products, the cost of use is lower than that of conventional tooling.

[0029] It should be pointed out that the above preferred embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A tool for cutting inner holes of thin-walled elongated cylinders, characterized in that: It includes a holding tube, a locking piece and a center frame sleeve. The holding tube is a cylindrical part, which is used to hold the outer circle of a thin-walled cylinder. The length of the holding tube is greater than or equal to the length of the thin-walled cylinder. The holding tube wraps the outer circle of the thin-walled cylinder in the length direction. The center frame sleeve has a accommodating cavity. The holding tube is inserted in the accommodating cavity. The center frame sleeve cooperates with the outer circle of the holding tube and serves as a support position for the center frame during lathe processing. The locking piece is passed through the center frame sleeve and tightens the holding tube.

2. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 1 is characterized in that: The embracing tube comprises at least two arc-shaped parts, which are arranged around the embracing tube axis and tightly embrace the thin-walled tube body.

3. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 2 is characterized in that: The wall thickness of the tube is greater than or equal to 10mm.

4. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 1 is characterized in that: A plurality of locking holes are arranged on the peripheral side of the central frame sleeve, the locking holes are arranged around the central axis of the central frame sleeve, and the locking pieces are passed through the locking holes.

5. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 1 is characterized in that: The central frame sleeve has an accommodating cavity at one end and a connecting portion at the other end.

6. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 1, characterized in that: The length of the center frame sleeve is greater than the width of the lathe center frame, and the length of the center frame sleeve is greater than or equal to one quarter of the length of the clamping tube.

7. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 1 is characterized in that: The locking member comprises an end portion and a screw portion connected to the end portion, the end portion comprises a matching joint, a sleeve body is arranged on the outer side of the matching joint, and a gap is arranged between the sleeve body and the matching joint.

8. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 7 is characterized in that: The end portion is provided with an annular groove, and a gasket is arranged in the annular groove.

9. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 8, characterized in that: The sleeve body is made of anti-corrosion material.

10. The tooling for cutting inner holes of thin-walled elongated cylinders according to claim 1, characterized in that: The holding tube and the center frame sleeve are made of 45 steel.

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