Rifling ultrasonic honing head

Abstract

The invention relates to the technical field of rifling machining, in particular to a rifling ultrasonic honing head. In order to solve the problem that the grinding surface quality of traditional rifling finish machining is poor, the novel rifling ultrasonic honing head is provided and comprises a center shaft, a hinged shell and a grinding head radial regulation and control assembly, and the rear end of the center shaft is spherically hinged to the hinged shell; the grinding head radial regulation and control assembly comprises a front annular plate, a rear annular plate, a plurality of first wedge-shaped blocks, a plurality of second wedge-shaped blocks, a plurality of ultrasonic transducers and a plurality of honing oilstones, the device comprises a plurality of blocky honing oilstones, a plurality of push-pull type electromagnets, a plurality of first wedge-shaped blocks, a plurality of second wedge-shaped blocks, a plurality of ultrasonic transducers, a plurality of blocky honing oilstones, a plurality of push-pull type electromagnets, a plurality of first wedge-shaped blocks, a plurality of second wedge-shaped blocks, a plurality of ultrasonic transducers and a plurality of blocky honing oilstones, and the plurality of push-pull type electromagnets and the plurality of ultrasonic transducers are connected with an external power supply through hollow circular electric slip rings. The grinding head improves the surface quality of the inner wall of the wire chamber gun barrel.

Description

Technical Field

[0001] The invention relates to the technical field of rifling processing, in particular to a rifling ultrasonic honing head. Background Art

[0002] Rifling, also known as rifling, is also called windmill line because its cross-sectional shape resembles a windmill. Rifling can be said to be the soul of the barrel. The function of rifling is to give the bullet the ability to rotate so that the bullet can still maintain a predetermined direction after leaving the barrel. In order to improve the accuracy and durability of the gun barrel, it is necessary to use advanced processing technology to finely process it. The traditional rifling processing methods for gun barrels mainly include extrusion and broaching. These methods can meet the needs of gun barrel processing to a certain extent. However, with the continuous advancement of science and technology and the continuous improvement of the performance requirements of guns, their limitations are becoming increasingly prominent. It is difficult to directly meet the rifling accuracy requirements. Therefore, finishing the rifling is an indispensable process in the rifling processing process. Traditional rifling finishing generally adopts ordinary grinding processing structure, the grinding surface quality is poor, and the spiral negative line on the inner wall of rifled gun barrels of different diameters needs to replace grinding heads of different sizes, which is cumbersome to operate and affects the overall processing progress of the rifling. Summary of the invention

[0003] In order to solve the problem that the grinding surface quality of traditional rifling finishing is poor and cannot be applied to the grinding of rifled gun barrels with different diameters, the present invention provides a new rifling ultrasonic honing head.

[0004] The present invention is achieved by adopting the following technical solutions: A rifling ultrasonic honing head comprises a grinding head body, the grinding head body comprises a central axis arranged in the front-to-back direction, a hinge shell, and a grinding head radial control component, the rear end of the central axis is spherically hinged to the hinge shell, the grinding head radial control component comprises a front annular plate and a rear annular plate arranged in the front-to-back direction, a plurality of push-pull electromagnets, a plurality of first wedge blocks in the shape of a right-angled trapezoid, a plurality of second wedge blocks in the shape of a right-angled trapezoid, a plurality of ultrasonic transducers arranged in the front-to-back direction, a plurality of honing oilstones, a plurality of push-pull electromagnets, a plurality of first wedge blocks, a plurality of second wedge blocks, a plurality of The number of several ultrasonic transducers and several block-shaped honing oilstones is adapted to the installation position, the front annular plate is fixed to the front end of the central shaft, a radial spacing is provided between the inner circle of the rear annular plate and the central shaft, a connecting partition is provided at the radially overlapping part of the front annular plate and the rear annular plate, so as to divide the space enclosed between the radially overlapping parts of the front annular plate and the rear annular plate into several radial adjustment spaces, several push-pull electromagnets are circumferentially fixed to the axial middle part of the outer circumferential surface of the central shaft and their axial directions are arranged along the front-to-back direction, several first wedge blocks are circumferentially arranged on the outer circumferential surface of the central shaft and located on the front annular plate The right-angled surfaces of the plurality of first wedge-shaped blocks are in contact with the outer circumferential surface of the central axis between the push-pull electromagnets, the wide end surfaces of the plurality of first wedge-shaped blocks are in contact with the iron core of the corresponding push-pull electromagnets, the plurality of second wedge-shaped blocks, the plurality of ultrasonic transducers, and the plurality of honing oilstones are correspondingly arranged on the side of the plurality of second wedge-shaped blocks away from the central axis and are radially arranged in sequence in the corresponding plurality of radial adjustment spaces, the inclined surfaces of the plurality of second wedge-shaped blocks are adapted to the inclined surfaces of the plurality of first wedge-shaped blocks, the plurality of push-pull electromagnets, the plurality of second wedge-shaped blocks, and the plurality of honing oilstones are It is frictionally clamped by the front annular plate and the rear annular plate, a plurality of ultrasonic transducers are respectively placed in a plurality of radial adjustment spaces and a telescopic deformation gap is provided between the plurality of ultrasonic transducers and the front annular plate and the rear annular plate, a plurality of ultrasonic transducers are clamped between the corresponding second wedge block and the honing oilstone, a hollow circular electric slip ring is fixed outside the central axis and is located between the push-pull electromagnet and the hinged shell, a plurality of push-pull electromagnets and a plurality of ultrasonic transducers are connected to an external power supply through the hollow circular electric slip ring, and a supporting sleeve is provided between the rear end of the shell of the plurality of push-pull electromagnets and the hollow circular electric slip ring.

[0005] When in use, the hinge shell is connected to the boring bar, and the grinding head is driven to rotate and displace along the inner wall of the rifled gun barrel through the ball joint. The push-pull electromagnet is connected to the power supply through the hollow circular electric slip ring to generate a magnetic field. The iron core in the push-pull electromagnet is magnetized under the action of the magnetic field, and is displaced by the attraction of the electromagnetic force. The iron core stretches, and then drives the first wedge block to move axially, thereby forcing the second wedge block to move radially. The second wedge block pushes the ultrasonic transducer and the honing oilstone to move radially, so that the honing oilstone can fit tightly on the inner wall of the rifled gun barrel, thereby improving the grinding surface quality. At the same time, by controlling the size of the alternating current passed into the push-pull electromagnet, the displacement length of the push-pull electromagnet is changed, so that it can adapt to different shapes and sizes of the rifled gun barrel. After the ultrasonic transducer is connected to the high-frequency alternating current through the hollow circular electric slip ring, the ultrasonic transducer performs periodic expansion and contraction vibration with the frequency of the electrical signal, effectively removing the fine defects on the inner wall of the rifled gun barrel and improving its grinding surface quality.

[0006] Furthermore, the grinding head radial adjustment assembly also includes a rubber pad located between the second wedge block and the ultrasonic transducer to prevent the second wedge block from directly squeezing the ultrasonic transducer and causing damage, thereby affecting the overall performance of the structure.

[0007] The beneficial effects of the present invention are as follows: 1) through the structural design of multiple matching push-pull electromagnets, a first wedge block, a second wedge block, and a honing oilstone, the grinding head can better fit the inner wall of the rifled gun barrel for grinding, and can also adapt to the different shapes and sizes of the rifled gun barrel; 2) through the vibration mechanism of the ultrasonic transducer, the uniform distribution of the grinding force is promoted, the risk of uneven wear is reduced, the fine defects on the inner wall of the rifled gun barrel are effectively removed, and the surface quality of the inner wall of the rifled gun barrel is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0010] Figure 1 A schematic diagram of the structure of the rifling ultrasonic honing head provided by the present invention; Figure 2 for Figure 1 The cross-sectional view of the rifling ultrasonic honing head in the AA direction when it is working; Figure 3 for Figure 2 Cross-sectional view in the BB direction; Figure 4 is a schematic diagram of an ultrasonic transducer; Figure 5 Schematic diagram of push-pull electromagnet.

[0011] In the figure: 1-rifled barrel, 2-center axis, 3-hinge shell, 4-front annular plate, 5-rear annular plate, 6-push-pull electromagnet, 601-iron core, 602-shell, 7-first wedge block, 8-second wedge block, 9-ultrasonic transducer, 10-honing oilstone, 11-connecting partition, 12-hollow round electric slip ring, 13-support sleeve, 14-rubber pad, 15-center extension, 16-nut, 17-washer, 18-annular steel ring, 19-annular limit groove, 20-boring rod. DETAILED DESCRIPTION

[0012] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0013] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0015] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] like Figures 1 to 5As shown, a rifling ultrasonic honing head comprises a grinding head body, the grinding head body comprises a central axis 2 arranged in the front-to-back direction, a hinge shell 3, and a grinding head radial control component, the rear end of the central axis 2 is spherically hinged to the hinge shell 3, the grinding head radial control component comprises a front annular plate 4 and a rear annular plate 5 arranged in the front-to-back direction, and a plurality of push-pull electromagnets 6, a plurality of first wedge blocks 7 in the shape of a right-angled trapezoid, a plurality of second wedge blocks 8 in the shape of a right-angled trapezoid, a plurality of ultrasonic transducers 9 arranged in the front-to-back direction, a plurality of honing oilstones 10, a plurality of push-pull electromagnets 6, a plurality of first wedge blocks 7, a plurality of second wedge blocks 8, a plurality of ultrasonic transducers 9 arranged in the front-to-back direction, a plurality of honing oilstones 10, a plurality of push-pull electromagnets 6, a plurality of first wedge blocks 7, a plurality of second wedge blocks 8, a plurality of ultrasonic transducers 9 arranged in the front-to-back direction, a plurality of The number of acoustic transducers 9 and several block-shaped honing oilstones 10 is adapted to the installation position, the front annular plate 4 is sleeved on the front end of the central shaft 2, a radial spacing is provided between the inner circle of the rear annular plate 5 and the central shaft 2, and a connecting partition 11 is provided at the radially overlapping portion of the front annular plate 4 and the rear annular plate 5, so as to divide the space enclosed between the radially overlapping portions of the front annular plate 4 and the rear annular plate 5 into several radial adjustment spaces, several push-pull electromagnets 6 are circumferentially fixed to the axial middle part of the outer circumferential surface of the central shaft 2 and their axial directions are arranged along the front-to-back direction, and several first wedge blocks 7 are circumferentially arranged on the outer circumferential surface of the central shaft 2 and are located between the front annular plate 4 and the push-pull electromagnet The plurality of first wedge blocks 7 are connected to the outer circumferential surface of the central axis 2, and the wide end surfaces of the plurality of first wedge blocks 7 are in contact with the iron core 601 of the corresponding push-pull electromagnet 6. The plurality of second wedge blocks 8, the plurality of ultrasonic transducers 9, and the plurality of honing oilstones 10 are correspondingly arranged on the side of the plurality of second wedge blocks 8 away from the central axis 2 and are arranged radially in turn in the corresponding plurality of radial adjustment spaces. The inclined surfaces of the plurality of second wedge blocks 8 are adapted to the inclined surfaces of the plurality of first wedge blocks 7. The plurality of push-pull electromagnets 6, the plurality of second wedge blocks 8, and the plurality of honing oilstones 10 are all connected to the front annular plate 4. It is frictionally clamped with the rear annular plate 5, several ultrasonic transducers 9 are respectively placed in several radial adjustment spaces and several ultrasonic transducers 9 are provided with telescopic deformation gaps with the front annular plate 4 and the rear annular plate 5, several ultrasonic transducers 9 are clamped between the corresponding second wedge blocks 8 and the honing oilstone 10, an empty circular electric slip ring 12 is fixed on the outside of the central axis 2 and is located between the push-pull electromagnet 6 and the hinged shell 3, several push-pull electromagnets 6 and several ultrasonic transducers 9 are connected to an external power supply through the empty circular electric slip ring 12, and a supporting sleeve 13 is provided between the rear end of the shell 602 of several push-pull electromagnets 6 and the empty circular electric slip ring 12.

[0017] When in use, the hinge shell 3 is connected to the boring bar 20, and the grinding head body is driven to rotate and displace along the inner wall of the rifled barrel 1 through the ball joint. The push-pull electromagnet 6 is powered on through the hollow round electric slip ring 12 to generate a magnetic field. The iron core 601 in the push-pull electromagnet 6 is magnetized under the action of the magnetic field and is displaced by the attraction of the electromagnetic force. The iron core 601 stretches, thereby driving the first wedge block 7 to move axially, thereby forcing the second wedge block 8 to move radially. The second wedge block 8 pushes the ultrasonic transducer 9 and the honing oilstone 10 radially. The honing oilstone 10 is moved so that it can fit tightly against the inner wall of the rifled barrel 1, thereby improving the quality of the grinding surface. At the same time, by controlling the size of the alternating current passed into the push-pull electromagnet 6, the displacement length of the push-pull electromagnet 6 is changed, so that it can adapt to the different shapes and sizes of the rifled barrel 1. After the ultrasonic transducer 9 is connected to the high-frequency alternating current through the hollow circular electric slip ring 12, the ultrasonic transducer 9 performs periodic expansion and contraction vibration with the frequency of the electrical signal, thereby effectively removing the fine defects on the inner wall of the rifled barrel 1 and improving its grinding surface quality.

[0018] In a specific implementation, the grinding head radial control assembly also includes a rubber pad 14 located between the second wedge block 8 and the ultrasonic transducer 9 (in a specific implementation, the rubber pad 14 can be adhered to the right-angle surface of the second wedge block 8) to prevent the second wedge block 8 from directly squeezing the ultrasonic transducer 9 and causing damage, thereby affecting the overall performance of the structure.

[0019] In specific implementation, an annular limiting groove 19 for limiting the front annular plate 4 is provided on the front end surface of the central shaft 2, the center of the front end portion of the central shaft 2 extends forward and extends outward from the front side of the front annular plate 4 to form a central extension portion 15, the diameter of the central extension portion 15 is smaller than the inner diameter of the annular limiting groove 19 and the central extension portion 15 is provided with an external thread, and the front annular plate 4 is tightened on the central extension portion 15 by a nut 16 to fix the front annular plate 4 and the central shaft 2. The structure is simple and easy to install and disassemble.

[0020] During specific implementation, a washer 17 is provided between the nut 16 and the front annular plate 4, and the structure is specific and standardized.

[0021] In specific implementation, a plurality of push-pull electromagnets 6 are fixedly connected to the central shaft 2 via an annular steel ring 18, and the structure is simple and practical.

[0022] In specific implementation, the hinged shell 3 is provided with a connection hole for connecting with the boring bar 20 by bolts, and the structure is concrete, which is convenient for installation and disassembly.

[0023] In the specific implementation, there are 10 push-pull electromagnets 6, first wedge blocks 7, second wedge blocks 8, rubber pads 14, ultrasonic transducers 9, and honing oilstones 10, and the structure is specific and standardized.

[0024] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; 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, and they should all be covered by the protection scope of the claims.

Claims

1. A rifling ultrasonic honing head, characterized in that: The invention comprises a grinding head body, the grinding head body comprises a central axis (2) arranged in the front-to-back direction, a hinge shell (3), and a grinding head radial control component, the rear end of the central axis (2) is spherically hinged to the hinge shell (3), the grinding head radial control component comprises a front annular plate (4) and a rear annular plate (5) arranged in the front-to-back direction, and a plurality of push-pull electromagnets (6), a plurality of first wedge blocks (7) in the shape of a right-angled trapezoid, a plurality of second wedge blocks (8) in the shape of a right-angled trapezoid, a plurality of ultrasonic transducers (9) arranged in the front-to-back direction, a plurality of honing oilstones (10), a plurality of push-pull electromagnets (6), a plurality of first wedge blocks (7), a plurality of second wedge blocks (8), a plurality of ultrasonic transducers (9), a plurality of block honing blocks, and a plurality of ultrasonic transducers (10). The number of oilstones (10) is adapted to the installation position, the front annular plate (4) is sleeved on the front end of the central shaft (2), a radial spacing is provided between the inner circle of the rear annular plate (5) and the central shaft (2), a connecting partition (11) is provided at the radially overlapping portion of the front annular plate (4) and the rear annular plate (5), so as to divide the space enclosed between the radially overlapping portions of the front annular plate (4) and the rear annular plate (5) into a plurality of radial adjustment spaces, a plurality of push-pull electromagnets (6) are circumferentially fixed to the axial middle portion of the outer circumferential surface of the central shaft (2) and the axial directions thereof are arranged along the front-back direction, a plurality of first wedge blocks (7) are circumferentially arranged on the outer circumferential surface of the central shaft (2) and are located between the front annular plate (4) and the push-pull electromagnets (6), and a plurality of first The right-angled surface of the wedge block (7) contacts the outer circumferential surface of the central axis (2); the wide end surfaces of the plurality of first wedge blocks (7) abut against the iron core (601) of the corresponding push-pull electromagnet (6); the plurality of second wedge blocks (8), the plurality of ultrasonic transducers (9), and the plurality of honing oilstones (10) are arranged on the side of the plurality of second wedge blocks (8) away from the central axis (2) and are arranged radially in sequence in the corresponding plurality of radial adjustment spaces; the inclined surfaces of the plurality of second wedge blocks (8) are adapted to the inclined surfaces of the plurality of first wedge blocks (7); the plurality of push-pull electromagnets (6), the plurality of second wedge blocks (8), and the plurality of honing oilstones (10) are all secured by the front annular plate (4) and the rear annular plate (5). Friction clamping, a plurality of ultrasonic transducers (9) are respectively placed in a plurality of radial adjustment spaces and a telescopic deformation gap is provided between the plurality of ultrasonic transducers (9) and the front annular plate (4) and the rear annular plate (5), the plurality of ultrasonic transducers (9) are clamped between the corresponding second wedge block (8) and the honing oilstone (10), a hollow circular electric slip ring (12) is sleeved outside the central shaft (2) and is located between the push-pull electromagnet (6) and the hinge shell (3), the plurality of push-pull electromagnets (6) and the plurality of ultrasonic transducers (9) are connected to an external power supply through the hollow circular electric slip ring (12), and a support sleeve (13) is provided between the rear end of the shell (602) of the plurality of push-pull electromagnets (6) and the hollow circular electric slip ring (12).

2. The rifling ultrasonic honing head according to claim 1, characterized in that: The grinding head radial control assembly also includes a rubber pad (14) located between the second wedge block (8) and the ultrasonic transducer (9).

3. The rifling ultrasonic honing head according to claim 2, characterized in that: The rubber pad (14) can be bonded to the right-angled surface of the second wedge-shaped block (8).

4. The rifling ultrasonic honing head according to claim 3, characterized in that: An annular limiting groove (19) for limiting the front annular plate (4) is provided on the front end surface of the central shaft (2); the center of the front end portion of the central shaft (2) extends forward and extends outward from the front side of the front annular plate (4) to form a central extension portion (15); the diameter of the central extension portion (15) is smaller than the inner diameter of the annular limiting groove (19); and the central extension portion (15) is provided with an external thread; the front annular plate (4) is tightened to the central extension portion (15) by a nut (16) to achieve the fixing of the front annular plate (4) and the central shaft (2).

5. The rifling ultrasonic honing head according to claim 4, characterized in that: A washer (17) is provided between the nut (16) and the front annular plate (4).

6. The rifling ultrasonic honing head according to claim 5, characterized in that: A plurality of push-pull type electromagnets (6) are fixedly connected to the central shaft (2) via an annular steel ring (18).

7. The rifling ultrasonic honing head according to claim 6, characterized in that: The hinged shell (3) is provided with a connection hole for being connected to the boring bar (20) via bolts.

8. The rifling ultrasonic honing head according to claim 7, characterized in that: There are 10 push-pull electromagnets (6), 1st wedge-shaped blocks (7), 1st wedge-shaped blocks (8), rubber pads (14), ultrasonic transducers (9), and honing oilstones (10).

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