Large-aperture inner hole rolling device for irregular-shaped workpiece

Abstract

The invention discloses a large-aperture inner hole rolling device for workpieces in irregular shapes, relates to the technical field of rolling devices, and aims to provide a structure scheme which is light in weight, simple in structure and suitable for large-aperture rolling machining. The invention discloses a Morse cone. The cutter handle is perpendicular to and fixedly connected with the Morse cone; the two tool aprons are arranged at the two ends of the tool handle correspondingly. The two sliding block bases are respectively connected with the two tool aprons; the two positioning sliding blocks are respectively connected with the two sliding block bases in a sliding manner; the adjusting assembly is used for adjusting the relative distance between the two positioning sliding blocks; the two limiting end covers are respectively connected with the two positioning slide blocks; the two limiting end covers are located at the two ends, away from each other, of the two positioning sliding blocks. A ball is arranged between the limiting end cover and the positioning sliding block, and the limiting end cover is hollow so that the ball can be exposed.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling devices, and particularly relates to a large-aperture internal hole rolling device for irregularly shaped workpieces. Background Art

[0002] Rolling is a process that uses a tool to apply a certain pressure to the surface of a workpiece, causing the surface layer metal of the workpiece to undergo plastic flow and fill into the original residual low concave valleys, thereby reducing the surface roughness value of the workpiece and improving the hardness, strength, wear resistance, and corrosion resistance of the rolled surface. Usually, the rolling operation can be completed using a lathe. For a small number of irregularly shaped products, if the rolling aperture is small, the rolling operation can also be completed by installing a bearing-type rolling tool on a numerical control machine tool. However, for some products that require large-aperture rolling and have irregular shapes, the existing lathe rolling and bearing-type rolling forms are no longer applicable. On the one hand, the current bearing-type rolling tools are only suitable for processing holes of about 100 mm and are difficult to adapt to larger-sized holes. Even if there are larger-sized bearing-type rolling tools, they are difficult to drive due to their excessive self-weight. On the other hand, the overly large and heavy size will also be restricted by clamping and is not conducive to ensuring the positioning accuracy. Based on this background, it is very necessary to propose a lightweight, simple-structured structural solution suitable for large-aperture rolling processing. Summary of the Invention

[0003] The present invention provides a large-aperture internal hole rolling device for irregularly shaped workpieces, comprising:

[0004] Morse taper;

[0005] A tool shank, which is perpendicular to and fixedly connected to the Morse taper;

[0006] Tool holders, two of which are provided and are respectively arranged at both ends of the tool shank;

[0007] Slider bases, two of which are provided and are respectively connected to the two tool holders;

[0008] Positioning sliders, two of which are provided and are respectively slidably connected to the two slider bases;

[0009] An adjusting assembly for adjusting the relative distance between the two positioning sliders;

[0010] Limit end caps, two of which are provided and are respectively connected to the two positioning sliders;

[0011] The two limit end caps are located at the two opposite ends of the two positioning sliders;

[0012] Ball bearings are provided between the limit end caps and the positioning sliders, and the limit end caps are hollowly arranged to expose the ball bearings.

[0013] A further setting of the present invention is that: the slider base is provided with a chute, and the positioning slider is located in the chute.

[0014] A further setting of the present invention is that: the positioning slider includes a square portion and a protruding portion, the square portion is in contact with the side wall of the chute, and the protruding portions of the two positioning sliders protrude toward opposite sides respectively.

[0015] A further setting of the present invention is that: the protruding portion is provided with a communicating mounting groove and a relief hole, a bearing is arranged in the mounting groove, the bearing is rotatably connected with the protruding portion, and the ball is located in the relief hole and abuts against the bearing.

[0016] A further setting of the present invention is that: the adjusting assembly includes an adjusting sleeve rod and two push rods, one ends of the two push rods are respectively threadedly connected to the two ends of the adjusting sleeve, and the other ends of the push rods extend out of the chute and abut against the positioning slider.

[0017] A further setting of the present invention is that: a locking nut is threadedly connected to the push rod.

[0018] A further setting of the present invention is that: a limit key groove is arranged at one end of the push rod away from the adjusting sleeve; a limit pin for inserting into the limit key groove is connected to the slider base.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The structures of the parts are all very simple, facilitating self-production, with low costs, and the connection relationships between them are simple, facilitating disassembly and assembly. At the same time, the self-weights of the parts are relatively light, and the overall device is generally in a T-shaped structure rather than a rotating body structure, so the overall weight can be well controlled.

[0021] 2. It has a wide range of applications. By changing the size of the tool shank, it can meet the rolling needs of different hole diameters. Mainly, it can achieve rolling processing of large hole diameters, up to 500 mm or even higher, and can cooperate with various types of numerical control machine tools such as vertical machining centers, horizontal machining centers, and floor boring mills, and the usage scenarios are not limited.

[0022] 3. The self-centering structure is reasonable. Since the adjusting assembly can move relative to the slider base, when rotating the adjusting sleeve, the entire adjusting assembly can adaptively change its position, enabling the two balls to abut against the inner hole wall with the same force, that is, realizing self-centering with the product inner hole, and avoiding rolling defects that may be caused by precision errors due to repeated positioning of the machine tool. Description of the Drawings

[0023] Figure 1 is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 is a partial explosion view of the present invention;

[0025] Figure 3 is a sectional view of the present invention;

[0026] Figure 4 is Figure 2 a partial enlarged view at position A in

[0027] Figure 5 is Figure 3 a partial enlarged view at position B in

[0028] Figure 6 is a three-dimensional structure diagram of the positioning slider in the present invention.

[0029] Reference numerals: 1, Morse taper; 2, tool shank; 3, tool holder; 4, slider base; 41, chute; 42, perforation; 43, limit pin; 44, gland; 5, adjustment assembly; 51, push rod; 511, limit keyway; 52, locking nut; 53, adjusting sleeve rod; 6, positioning slider; 61, square part; 62, protruding part; 63, mounting groove; 64, pin shaft; 65, avoidance hole; 7, bearing; 8, ball; 9, limit end cover. Detailed implementation manners

[0030] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0031] Referring to Figures 1-6 , the present invention provides a large-aperture internal hole rolling device for irregularly shaped workpieces, including a Morse taper 1, a tool shank 2, a tool holder 3, a slider base 4, a positioning slider 6, an adjustment assembly 5, a ball 8, and a limit end cover 9.

[0032] The Morse taper 1 is a conventional structure for connecting a tool fixture.

[0033] The tool shank 2 is a long rectangular body, fixedly connected to the large-diameter end of the Morse taper 1 and perpendicular to it, and the two ends of the tool shank 2 are symmetrically arranged with respect to the axis of the Morse taper 1.

[0034] Two tool holders 3 are provided and are respectively fixed to the two ends of the tool shank 2.

[0035] Two slider bases 4 are provided and are respectively fixed to the two tool holders 3. The slider base 4 is provided with a communicating chute 41 and a perforation 42. The perforations 42 on the two slider bases 4 are located between the two chutes 41, and the axial direction of the perforation 42 is parallel to the length direction of the tool shank 2. The chute 41 opens on the surfaces of the two slider bases 4 facing away from each other. The slider base 4 is also detachably connected to the gland 44 by bolts. The gland 44 is used to cover the chute 41.

[0036] Two positioning sliders 6 are provided and are respectively located in two slide grooves 41. The positioning slider 6 includes a square portion 61 and a protruding portion 62. The square portion 61 is in contact with the side wall of the slide groove 41 and is also in contact with the pressure cover 44, thereby limiting the rotation of the positioning slider 6 so that the positioning slider 6 can only move along the length direction of the shank 2. The protruding portions 62 of the two positioning sliders 6 extend toward opposite sides respectively. The protruding portion 62 is provided with a connecting mounting groove 63 and an avoidance hole 65. A bearing 7 is provided in the mounting groove 63, and the bearing 7 is rotatably connected to the protruding portion 62 through a pin 64. The ball 8 is located in the avoidance hole 65 and abuts against the bearing 7.

[0037] The limit end cover 9 is threadedly connected to the extension 62, so that the ball 8 is located between the limit end cover 9 and the positioning slider 6, and the limit end cover 9 is hollow to expose the ball 8. The limit end cover 9 and the avoidance hole 65 restrict the movement of the ball 8, so that the ball 8 can only be supported by the bearing 7 to rotate, and then the ball 8 can be used to try the rolling process.

[0038] The adjustment assembly 5 includes an adjustment sleeve, two push rods 51 and two locking nuts 52. The push rod 51 and the adjustment sleeve are parallel to the length direction of the knife seat 3. One end of the two push rods 51 is threadedly connected to the two ends of the adjustment sleeve respectively, specifically, the push rod 51 is inserted into the adjustment sleeve for connection, and the two push rods 51 are respectively provided with left-handed threads and right-handed threads, so that when the adjustment sleeve rotates, the two push rods 51 will move closer or farther away synchronously. The two locking nuts 52 are threadedly connected to the two push rods 51 respectively. In the locked state, the locking nuts 52 are pressed against the end face of the adjustment sleeve, so that the locking nuts 52 provide sufficient axial force to the push rod 51, thereby avoiding the relative movement of the push rod 51 and the adjustment sleeve due to factors such as vibration. The other end of the push rod 51 extends into the slide groove 41 through the through hole 42 and contacts the positioning slider 6. A limit key groove 511 is provided at one end of the push rod 51 away from the adjusting sleeve, and the slider base 4 is connected by a limit pin 43 for inserting into the limit key groove 511, thereby limiting the rotation of the push rod 51 so that the push rod 51 can only move axially within a certain range. In this way, when the position of the push rod 51 is to be adjusted, the adjusting sleeve can be directly screwed, which also prevents the push rod 51 from detaching from the slider base 4.

[0039] In specific application, firstly, a fixture is used to clamp the Morse cone 1, then the entire device is inserted into the inner hole and the position is adjusted by centering, and then the adjusting sleeve is rotated so that the two sleeves push the two positioning sliders 6 and the ball 8 contacts the hole wall of the inner hole. Then the adjusting sleeve is further rotated to change the rolling force. Then, the workpiece and the device are driven to rotate relative to each other, and the rolling process can be realized.

[0040] The technical effects of this solution are as follows: 1. The structures of all components are very simple, facilitating self-production, with low costs. Moreover, the connection relationships between them are simple, making disassembly and assembly convenient. At the same time, the self-weights of all components are relatively light, and the overall device is generally in a T-shaped structure rather than a rotating body structure, so the overall weight can be well controlled.

[0041] 2. It has a wide range of applications. By changing the size of the tool shank 2, it can meet the rolling requirements for different hole diameters. In particular, it can achieve rolling processing for large hole diameters, up to 500 mm or even higher, and can cooperate with various types of CNC machine tools such as vertical machining centers, horizontal machining centers, and floor-type boring machines, without being restricted by the usage scenarios.

[0042] 3. The self-centering structure is reasonable. Since the adjusting assembly 5 can move relative to the slider base 4, when rotating the adjusting sleeve, the entire adjusting assembly 5 can adaptively change its position, enabling the two balls 8 to contact the inner hole wall with the same force, that is, realizing self-centering with the product inner hole, and avoiding rolling defects that may be caused by precision errors due to repeated positioning of the machine tool.

[0043] Embodiment 2

[0044] This embodiment provides a rolling boring machine, including a boring machine body and a large-hole inner hole rolling device for irregular-shaped workpieces as in Embodiment 1. The boring machine body is a device dedicated to boring, capable of achieving high-precision hole machining, and there are no excessive restrictions on the external dimensions of the workpieces that can be fixed on its workpiece platform. A tool fixture is provided on the boring machine body, and the tool fixture is used to clamp the Morse taper 1 in the large-hole inner hole rolling device for irregular-shaped workpieces, so as to achieve the large-hole rolling process, and it is not limited to the size and shape of the workpieces. In addition, it has all the technical effects of Embodiment 1.

[0045] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

[0046] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0047] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0049] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A large-aperture internal hole rolling device for irregularly shaped workpieces, characterized in that include: Morse cone (1); A knife handle (2) is vertically and fixedly connected to the Morse cone (1); Two knife seats (3) are provided and are respectively arranged at two ends of the knife handle (2); Two slider bases (4) are provided and are respectively connected to the two knife seats (3); Two positioning sliders (6) are provided and are respectively slidably connected to the two slider bases (4); An adjustment component (5) for adjusting the relative distance between the two positioning slide blocks (6); Two limiting end covers (9) are provided and are respectively connected to the two positioning slide blocks (6); The two limiting end covers (9) are located at two opposite ends of the two positioning slide blocks (6); A ball bearing (8) is arranged between the position-limiting end cover (9) and the positioning slide block (6), and the position-limiting end cover (9) is hollow so that the ball bearing (8) is exposed.

2. The large-aperture internal hole rolling device for irregularly shaped workpieces according to claim 1, characterized in that: The slider base (4) is provided with a slide groove (41), and the positioning slider (6) is located in the slide groove (41).

3. The large-aperture internal hole rolling device for irregularly shaped workpieces according to claim 2, characterized in that: The positioning slide block (6) comprises a square portion (61) and a protruding portion (62), wherein the square portion (61) is in contact with the side wall of the slide groove (41), and the protruding portions (62) of the two positioning slide blocks (6) protrude towards two opposite sides respectively.

4. The large-aperture internal hole rolling device for irregularly shaped workpieces according to claim 3, characterized in that: The protruding portion (62) is provided with a connecting mounting groove (63) and an avoidance hole (65); a bearing (7) is provided in the mounting groove (63); the bearing (7) is rotatably connected to the protruding portion (62); and the ball (8) is located in the avoidance hole (65) and abuts against the bearing (7).

5. The large-aperture internal hole rolling device for irregularly shaped workpieces according to claim 2, characterized in that: The adjustment assembly (5) comprises an adjustment sleeve rod (53) and two push rods (51), one end of the two push rods (51) are respectively threadedly connected to the two ends of the adjustment sleeve, and the other end of the push rod (51) extends out of the slide groove (41) and contacts the positioning slide block (6).

6. The large-aperture internal hole rolling device for irregularly shaped workpieces according to claim 5, characterized in that: A locking nut (52) is threadedly connected to the push rod (51).

7. The large-aperture internal hole rolling device for irregularly shaped workpieces according to claim 5, characterized in that: A limit key groove (511) is provided at one end of the push rod (51) facing away from the adjustment sleeve; and a limit pin (43) for inserting into the limit key groove (511) is connected to the slider base (4).

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