A fastening tooling for boring machining

Abstract

The present invention provides a fastening tooling for boring machining, which relates to the field of boring tooling. The fastening tooling for boring machining includes at least three longitudinal support members and two positioning structures. The longitudinal support members extend in a direction parallel to the axis of the shaft hole of the tail shaft bracket, and at least three longitudinal support members are circumferentially spaced outside the tail shaft bracket. The two positioning structures are respectively installed at the ends of at least three longitudinal support members; a pressing structure is provided on the inner side of each of the at least three longitudinal support members, and the pressing structure is used for tightly fitting with the outer wall of the tail shaft bracket. Connecting seats are respectively provided at both ends of the longitudinal support members; a boring bar through hole is provided in the middle of the positioning structure, and an adjustable connecting portion is further provided on the positioning structure outside the boring bar through hole. The adjustable connecting portion is adjustably assembled and connected with the connecting seat along the radial direction of the shaft hole of the tail shaft bracket. A frame-shaped bracket tightly sleeved outside the tail shaft bracket is formed by connecting the positioning structure and the longitudinal support members, which is convenient for assembly and has a low construction difficulty.

Description

Technical Field

[0001] The invention relates to the technical field of boring tooling, in particular to a fastening tooling used for boring processing. Background Art

[0002] The tail shaft, also known as the "stern shaft", is the last section of the ship's shaft system and is used to install the propeller. The tail shaft is generally installed in the shaft hole of the tail shaft bracket through a bearing. The machining accuracy of the shaft hole of the tail shaft bracket is crucial to the entire ship.

[0003] During the shipbuilding process, the existing holes on the tail shaft bracket need to be bored on site before installing the tail shaft. When boring on site, structural parts such as I-beams, channel steels and angle steels are usually welded and fixed on the tail shaft bracket to be processed to form a temporary bracket; the boring equipment is then welded and fixed to the end face of the temporary bracket, and the boring equipment and the tail shaft bracket are aligned before boring operations can be carried out.

[0004] During the entire boring construction, the early welding of temporary brackets will damage the surface paint of the tail shaft bracket, and the welding heat input will cause uneven material stress; after boring, the temporary brackets are removed using flame cutting technology, which can easily cause thermal stress deformation of the processed shaft hole, affecting the roundness and straightness of the shaft hole.

[0005] In summary, the method of welding a temporary bracket to achieve boring processing will not only damage the paint layer and original structure of the tail shaft bracket, but the high welding temperature and cutting temperature will affect the processing accuracy of the shaft hole; moreover, the construction of the temporary bracket by welding is difficult and the actual boring operation is complicated. Summary of the invention

[0006] In order to solve the above-mentioned problems, the purpose of the present invention is to provide a fastening tool for boring processing, so as to solve the problem that the method of using welding temporary brackets to realize boring processing will not only damage the paint layer and original structure of the tail shaft bracket, but also the high welding temperature and cutting temperature will affect the processing accuracy of the shaft hole; moreover, the construction difficulty of welding to build a temporary bracket is large, and the actual boring operation is complicated.

[0007] The technical solution of the fastening tool for boring processing of the present invention is:

[0008] The fastening tooling for boring processing comprises at least three longitudinal support members and two positioning structures, wherein the longitudinal support members extend parallel to the axis direction of the shaft hole of the tail shaft bracket, and at least three of the longitudinal support members are circumferentially spaced and distributed outside the tail shaft bracket, and the two positioning structures are respectively installed at the ends of the at least three longitudinal support members;

[0009] At least three of the longitudinal support members are provided with a pressing structure on the inner side, and the pressing structure is used to tightly fit with the outer wall of the tail shaft bracket. Connecting seats are respectively provided at both ends of the longitudinal support members; a boring bar through hole is provided in the middle of the positioning structure, and an adjustable connecting part is also provided on the outer side of the boring bar through hole on the positioning structure, and the adjustable connecting part is adjustably assembled and connected with the connecting seat along the radial direction of the shaft hole of the tail shaft bracket.

[0010] Furthermore, the longitudinal support member is a longitudinal support beam, and the length direction of the longitudinal support beam extends parallel to the axis direction of the shaft hole of the tail shaft bracket.

[0011] Furthermore, there are four longitudinal support beams, namely a first longitudinal support beam, a second longitudinal support beam, a third longitudinal support beam and a fourth longitudinal support beam. The first longitudinal support beam is arranged on the upper side of the axial hole of the tail shaft bracket, the second longitudinal support beam is arranged on the lower side of the axial hole of the tail shaft bracket, the third longitudinal support beam is arranged on the left side of the axial hole of the tail shaft bracket, and the fourth longitudinal support beam is arranged on the right side of the axial hole of the tail shaft bracket.

[0012] Furthermore, the positioning structure includes a positioning sleeve and at least three arms, at least three arms are circumferentially fixed on the outside of the positioning sleeve, the inner hole of the positioning sleeve constitutes the boring bar through hole, and the adjustable connecting part is arranged at one end of the arm away from the positioning sleeve.

[0013] Furthermore, there are four arms, namely an upper arm, a lower arm, a left arm and a right arm, and there are four longitudinal support beams, and the upper arm, the lower arm, the left arm and the right arm are respectively adjustably assembled and connected to the corresponding longitudinal support beams.

[0014] Furthermore, the adjustable connecting portion is an elongated hole opened on the support arm, the elongated hole is extended along the length direction of the support arm, the connecting seat is provided with a bolt hole whose hole axis extends along the axis direction of the shaft hole of the tail shaft bracket, and fastening bolts are passed through the elongated hole and the bolt hole.

[0015] Furthermore, the connecting seat is an L-shaped support, and the L-shaped support includes a horizontal section and a vertical section. The horizontal section is fixedly connected to the longitudinal support beam, and the bolt hole is opened on the vertical section.

[0016] Furthermore, the pressing structure is a pressing frame, which is arranged perpendicular to the length direction of the longitudinal support beam, and an end of the pressing frame is provided with a spacer layer for extrusion-matching with the outer wall of the tail shaft bracket.

[0017] Furthermore, a pad is installed at the end of the pressing frame, an adjustable bolt is connected between the pad and the pressing frame, and the spacer layer is fixed on the side of the pad facing away from the pressing frame.

[0018] Furthermore, the longitudinal support beam is made of I-shaped steel, and two of the top pressure structures are arranged on a flange on one side of the longitudinal support beam close to the shaft hole of the tail shaft bracket, and the two top pressure structures are arranged at intervals along the length direction of the longitudinal support beam.

[0019] Beneficial effect: The fastening tool for boring processing adopts a design of at least three longitudinal support members and two positioning structures. When in use, at least three longitudinal support members are arranged circumferentially at intervals on the outside of the tail shaft bracket, and the pressing structure on the inner side of the longitudinal support members is used to press against the outer wall of the tail shaft bracket, thereby supporting and fixing the entire fastening tool. Compared with the method of welding temporary brackets to achieve boring processing in the prior art, it avoids damaging the paint layer and original structure of the tail shaft bracket, and prevents high welding temperature and high cutting temperature from affecting the processing accuracy of the shaft hole.

[0020] Connecting seats are provided at both ends of the longitudinal support member, and the adjustable connecting portion on the positioning structure is radially adjustable and assembled with the connecting seat of the longitudinal support member. On the one hand, the positioning structure and the longitudinal support member are connected to form a frame-shaped bracket, and the frame-shaped bracket clamp is arranged outside the tail shaft bracket. The boring bar through hole in the middle of the positioning structure can be used to install the corresponding boring equipment. The assembly and connection of the entire fastening tooling are convenient, the construction difficulty is low, and the actual boring operation is more convenient. On the other hand, according to the positional relationship between the boring bar through hole and the axial hole of the tail shaft bracket, the position of the positioning structure can be adjusted along the radial direction of the axial hole of the tail shaft bracket, so that the boring bar through holes of the two positioning structures are respectively kept on the same axis with the axial hole of the tail shaft bracket, thereby ensuring that the boring equipment performs accurate boring processing along the axial direction of the boring bar through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of a fastening tool for boring processing in a specific embodiment of the fastening tool for boring processing of the present invention when the fastening tool for boring processing is installed on a tail shaft bracket;

[0022] Figure 2 for Figure 1 A schematic diagram of the front view of a fastening tool used for boring processing;

[0023] Figure 3 for Figure 1 A left schematic diagram of a fastening fixture used for boring processing;

[0024] Figure 4 It is a front view schematic diagram of a longitudinal support beam in a specific embodiment of a fastening tool for boring processing of the present invention;

[0025] Figure 5 It is a front view schematic diagram of the positioning structure in a specific embodiment of the fastening tool for boring processing of the present invention.

[0026] In the figure: 1 - longitudinal support beam, 10 - top pressure structure, 100 - pad, 101 - spacer layer, 102 - adjustable bolt, 11 - connecting seat, 2 - positioning structure, 20 - positioning sleeve, 21 - support arm, 210 - long hole, 22 - fastening bolt, 200 - boring bar through hole, 3 - tail shaft bracket, 30 - shaft hole of tail shaft bracket, 4 - boring equipment, 40 - boring bar, 41 - driving motor, 42 - boring tool holder. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] A specific embodiment 1 of the fastening tool for boring processing of the present invention is as follows: Figures 1 to 5 As shown, the fastening tooling for boring processing includes at least three longitudinal support members and two positioning structures 2, the longitudinal support members extend parallel to the axial direction of the shaft hole 30 of the tail shaft bracket, and the at least three longitudinal support members are circumferentially spaced and distributed outside the tail shaft bracket 3, and the two positioning structures 2 are respectively installed at the ends of the at least three longitudinal support members; the inner sides of the at least three longitudinal support members are provided with a pressing structure 10, the pressing structure 10 is used to be tightly matched with the outer wall of the tail shaft bracket 3, and connecting seats 11 are respectively provided at both ends of the longitudinal support members; a boring bar through hole 200 is provided in the middle part of the positioning structure 2, and an adjustable connecting part is also provided on the outer side of the boring bar through hole 200 on the positioning structure 2, and the adjustable connecting part and the connecting seat are radially adjustably assembled and connected along the shaft hole 30 of the tail shaft bracket.

[0029] The fastening tool for boring processing adopts a design of at least three longitudinal support members and two positioning structures 2. When in use, at least three longitudinal support members are arranged at intervals in the circumferential direction on the outside of the tail shaft bracket 3, and the pressing structure 10 on the inner side of the longitudinal support members is used to press against the outer wall of the tail shaft bracket 3, so as to support and fix the entire fastening tool. Compared with the method of welding temporary brackets to achieve boring processing in the prior art, it avoids damaging the paint layer and original structure of the tail shaft bracket, and prevents the high temperature of welding and cutting from affecting the processing accuracy of the shaft hole.

[0030] Connecting seats 11 are provided at both ends of the longitudinal support member, and the adjustable connecting portion on the positioning structure 2 is radially adjustable and assembled with the connecting seat 11 of the longitudinal support member. On the one hand, the positioning structure 2 and the longitudinal support member are connected to form a frame-shaped bracket, and the frame-shaped bracket clamp is arranged outside the tail shaft bracket 3. The boring bar through hole 200 in the middle of the positioning structure 2 can be used to install the corresponding boring equipment 4. The assembly and connection of the entire fastening tooling are convenient, the construction difficulty is low, and the actual boring operation is more convenient. On the other hand, according to the positional relationship between the boring bar through hole 200 and the axial hole 30 of the tail shaft bracket, the position of the positioning structure 2 can be radially adjusted along the axial hole 30 of the tail shaft bracket, so that the boring bar through holes 200 of the two positioning structures 2 are respectively kept on the same axis with the axial hole 30 of the tail shaft bracket, thereby ensuring that the boring equipment 4 performs accurate boring processing along the axial direction of the boring bar through hole 200.

[0031] It should be noted that the shaft hole 30 of the tail shaft bracket refers to a high-precision mounting hole that is required to be machined on the tail shaft bracket 3. In order to facilitate the insertion of the boring bar 40, a hole is preset on the tail shaft bracket 3 in advance. The purpose of boring is to enlarge and fine-process the existing hole to ensure the subsequent installation accuracy of the tail shaft. The boring equipment 4 includes a boring bar 40, a driving motor 41 and a boring tool holder 42. The boring bar 40 is sequentially inserted into the boring bar through hole 200 of the front positioning structure 2, the axial hole 30 of the tail shaft bracket and the boring bar through hole 200 of the rear positioning structure 2. The driving motor 41 is transmission-connected to the boring bar 40. The boring tool holder 42 is installed on the boring bar 40 and between the positioning structure 2 and the tail shaft bracket 3. The boring tool holder 42 is also equipped with a boring tool. The boring bar 40, the boring tool holder 42 and the boring tool are driven to rotate by the driving motor 41, thereby boring the axial hole 30 of the tail shaft bracket.

[0032] In this embodiment, the longitudinal support member is a longitudinal support beam 1, and the length direction of the longitudinal support beam 1 extends parallel to the axis direction of the shaft hole 30 of the tail shaft bracket. In addition, there are four longitudinal support beams 1, namely the first longitudinal support beam, the second longitudinal support beam, the third longitudinal support beam and the fourth longitudinal support beam. The first longitudinal support beam is arranged on the upper side of the shaft hole 30 of the tail shaft bracket, the second longitudinal support beam is arranged on the lower side of the shaft hole 30 of the tail shaft bracket, the third longitudinal support beam is arranged on the left side of the shaft hole 30 of the tail shaft bracket, and the fourth longitudinal support beam is arranged on the right side of the shaft hole 30 of the tail shaft bracket. The longitudinal support beams 1 in the upper, lower, left and right directions cooperate with the tail shaft bracket 3 through the top pressing structure 10 on the inner side thereof, so that the entire fastening tooling is firmly fixed on the tail shaft bracket 3, avoiding the problem of tooling movement during boring processing.

[0033] The positioning structure 2 includes a positioning sleeve 20 and at least three arms 21, at least three arms 21 are fixed on the outer side of the positioning sleeve 20 at circumferential intervals, the inner hole of the positioning sleeve 20 constitutes a boring rod through hole 200, and the adjustable connection portion is arranged at one end of the arm 21 away from the positioning sleeve 20. Correspondingly, there are four arms 21, which are an upper arm, a lower arm, a left arm and a right arm, respectively, and the upper arm, the lower arm, the left arm and the right arm are respectively connected to the corresponding longitudinal support beam 1 in an adjustable manner. Specifically, the upper arm of the positioning structure 2 is connected to the first longitudinal support beam in an adjustable manner, the lower arm of the positioning structure 2 is connected to the second longitudinal support beam in an adjustable manner, the left arm of the positioning structure 2 is connected to the third longitudinal support beam in an adjustable manner, and the right arm of the positioning structure 2 is connected to the fourth longitudinal support beam in an adjustable manner, thereby forming a quadrangular prism frame outside the tail shaft bracket 3, and the position of the boring hole can be adjusted according to actual conditions.

[0034] In this embodiment, the adjustable connection part is an elongated hole 210 provided on the support arm 21, and the elongated hole 210 is extended along the length direction of the support arm 21. The connection seat 11 of the longitudinal support beam 1 is provided with a bolt hole whose hole axis extends along the axis direction of the shaft hole 30 of the tail shaft bracket, and the elongated hole 210 of the support arm 21 and the bolt hole of the connection seat 11 are penetrated with a fastening bolt 22. The support arm 21 of the positioning structure 2 is fixed to the connection seat 11 of the longitudinal support beam 1 by the fastening bolt 22. Since the elongated hole 210 is provided on the support arm 21, the radial position of the positioning structure 2 relative to the shaft hole 30 of the tail shaft bracket can be flexibly adjusted.

[0035] The connecting seat 11 is an L-shaped support, which includes a horizontal section and a vertical section. The horizontal section of the L-shaped support is fixedly connected to the longitudinal support beam 1, and the horizontal section of the L-shaped support is fixedly connected to the longitudinal support beam 1 by bolts, and the bolt holes are opened on the vertical section of the L-shaped support.

[0036] The top pressure structure 10 is a top pressure frame, which is arranged perpendicular to the length direction of the longitudinal support beam 1. The end of the top pressure frame is provided with a spacer layer 101 for extrusion matching with the outer wall of the tail shaft bracket 3. Specifically, a pad 100 is installed at the end of the top pressure frame, and an adjustable bolt 102 is connected between the pad 100 and the top pressure frame. The spacer layer 101 is fixed on the side of the pad facing away from the top pressure frame. The pad 100 and the adjustable bolt 102 are designed at the end of the top pressure frame, and the end position of the top pressure structure 10 can be slightly adjusted to adapt to the curved outer wall profile of the tail shaft bracket 3. In addition, the spacer layer 101 is specifically a brake pad, which can increase the friction between the two and prevent hard contact from causing bumps and wear.

[0037] In addition, the longitudinal support beam 1 is made of I-shaped steel, and two pressing frames are arranged on one side flange of the longitudinal support beam 1 close to the shaft hole 30 of the tail shaft bracket, and the two pressing frames are arranged at intervals along the length direction of the longitudinal support beam 1. Two pressing frames are arranged at intervals along the axial direction of the shaft hole 30 of the tail shaft bracket on the longitudinal support beam 1, which increases more fulcrum positions and ensures the installation reliability of the fastening tooling and the tail shaft bracket.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A fastening tooling for boring machining, Characterized in that, It includes at least three longitudinal support members and two positioning structures. The longitudinal support members extend parallel to the axis direction of the shaft hole of the tail shaft bracket, and at least three of the longitudinal support members are circumferentially spaced and distributed outside the tail shaft bracket. The two positioning structures are respectively installed at the ends of at least three of the longitudinal support members; A pressing structure is provided on the inner side of at least three of the longitudinal support members. The pressing structure is used for tightly fitting with the outer wall of the tail shaft bracket. Connecting seats are respectively provided at both ends of the longitudinal support members; A boring bar through hole is provided in the middle of the positioning structure, and an adjustable connecting part is further provided on the positioning structure outside the boring bar through hole. The adjustable connecting part and the connecting seat are adjustably assembled and connected in the radial direction of the shaft hole of the tail shaft bracket; The longitudinal support member is a longitudinal support beam, and the length direction of the longitudinal support beam extends parallel to the axis direction of the shaft hole of the tail shaft bracket; There are four longitudinal support beams, which are the first longitudinal support beam, the second longitudinal support beam, the third longitudinal support beam and the fourth longitudinal support beam respectively. The first longitudinal support beam is arranged above the shaft hole of the tail shaft bracket, the second longitudinal support beam is arranged below the shaft hole of the tail shaft bracket, the third longitudinal support beam is arranged on the left side of the shaft hole of the tail shaft bracket, and the fourth longitudinal support beam is arranged on the right side of the shaft hole of the tail shaft bracket; The positioning structure includes a positioning sleeve and at least three support arms. At least three of the support arms are circumferentially fixed on the outside of the positioning sleeve. The inner hole of the positioning sleeve forms the boring bar through hole, and the adjustable connecting part is arranged at the end of the support arm away from the positioning sleeve; There are four support arms, which are the upper support arm, the lower support arm, the left support arm and the right support arm respectively. There are four longitudinal support beams. The upper support arm, the lower support arm, the left support arm and the right support arm are respectively adjustably assembled and connected with the corresponding longitudinal support beams; The adjustable connecting part is an elongated hole opened on the support arm. The elongated hole extends along the length direction of the support arm. A bolt hole with an axis extending along the axis direction of the shaft hole of the tail shaft bracket is provided on the connecting seat. A fastening bolt is inserted through the elongated hole and the bolt hole; So that the boring bar is sequentially inserted into the boring bar through holes of the front positioning structure, the shaft hole of the tail shaft bracket and the boring bar through holes of the rear positioning structure.

2. The fastening tooling for boring machining according to claim 1, Characterized in that, The connecting seat is an L-shaped support. The L-shaped support includes a horizontal section and a vertical section. The horizontal section is fixedly connected to the longitudinal support beam, and the bolt hole is opened on the vertical section.

3. The fastening tooling for boring machining according to claim 1, Characterized in that, The pressing structure is a pressing frame. The pressing frame is arranged perpendicular to the length direction of the longitudinal support beam. A spacer layer for squeezing and fitting with the outer wall of the tail shaft bracket is provided at the end of the pressing frame.

4. The fastening tooling for boring machining according to claim 3, Characterized in that, A backing plate is installed at the end of the top pressing frame. An adjustable bolt is connected between the backing plate and the top pressing frame. The spacer layer is fixed on the side of the backing plate facing away from the top pressing frame.

5. The fastening tooling for boring machining according to claim 1, characterized in that the longitudinal support beam is made of I-shaped steel. Two of the top pressing structures are provided on one flange of the longitudinal support beam close to the shaft hole of the tail shaft bracket. The two top pressing structures are arranged at intervals along the length direction of the longitudinal support beam.

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