A boring tool and boring method for a steering gear connecting flange

Abstract

The invention discloses a boring tool and boring method for a steering gear connecting flange, wherein the boring tool comprises a boring machine and a positioning plate, wherein the plate surface of the positioning plate is respectively provided with a flange mounting area for being fixedly connected with the steering gear connecting flange and a boring machine mounting area for fixing the boring machine, wherein the flange mounting area of ​​the positioning plate is provided with a bolt connection hole, and the boring machine mounting area of ​​the positioning plate is provided with a waist-shaped hole; the steering gear connecting flange comprises an upper flange arranged on a rotary vane steering gear and a lower flange arranged on a steering gear base for being connected with the upper flange, wherein a plurality of pre-drilled holes are arranged on the upper flange along the circumferential direction; the positioning plate is positioned on the plane of the upper flange and is fixed to the upper flange by bolts arranged between the bolt connection hole and the pre-drilled hole, and the boring machine is positioned on the plane of the boring machine mounting area of ​​the positioning plate and is fixed to the positioning plate by fastening screws connected between the boring machine and the waist-shaped hole. The invention solves the problem that the steering gear flange cannot be bored.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding process equipment, and in particular to a boring tool and a boring method for a steering gear connecting flange. Background Art

[0002] The 40,000-ton self-unloading ship is the first ship newly developed by the company. After the steering gear is installed, it is necessary to drill and bore the bolt holes on the steering gear flange on site. However, the flange surface of this type of steering gear is small, and it is impossible to adsorb the magnetic seat drill on the steering gear body seat for drilling like the original 53000 series ship. In addition, the on-site boring and processing of the bolt holes also requires a new tooling platform.

[0003] Therefore, a special boring tool is designed and manufactured to solve the above problems. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a boring tool and boring method for a steering gear connecting flange, aiming to solve the problem that the steering gear flange cannot be bored. The specific technical solution is as follows:

[0005] A boring tool for a steering gear connecting flange, comprising a boring machine and a positioning plate for fixing the boring machine, wherein the plate surface of the positioning plate is respectively provided with a flange mounting area for fixedly connecting to the steering gear connecting flange and a boring machine mounting area for fixing the boring machine, the flange mounting area of ​​the positioning plate is provided with a bolt connecting hole, and the boring machine mounting area of ​​the positioning plate is provided with a waist-shaped hole; the steering gear connecting flange comprises an upper flange arranged on the rotary vane steering gear and a lower flange arranged on the steering gear base for connecting to the upper flange, and a number of pre-drilled holes are circumferentially arranged on the upper flange; the positioning plate is positioned on the plane of the upper flange and is fixed to the upper flange by bolts arranged between the bolt connecting hole and the pre-drilled hole, and the boring machine is positioned on the plane of the boring machine mounting area of ​​the positioning plate and is fixed to the positioning plate by fastening screws connected between the boring machine and the waist-shaped hole.

[0006] As a preferred solution of a boring tool for a servo connecting flange of the present invention, the bolt connecting hole includes a first bolt connecting hole and a second bolt connecting hole arranged at intervals, and the waist-shaped hole includes a first waist-shaped hole, a second waist-shaped hole and a third waist-shaped hole arranged dispersedly; an avoidance gap is provided on the positioning plate and at a position between the first bolt connecting hole and the second bolt connecting hole, and the avoidance gap is used for the smooth passage of the boring machine spindle during boring.

[0007] In the present invention, a height pad is provided between the upper flange of the rotary vane servo and the lower flange of the servo base; before boring, the upper flange, the height pad and the lower flange are clamped and fixed by a bow clamp; the positioning plate and the upper flange are fixed by bolts passing through the bolt connection holes and the pre-drilled holes, and nuts connecting the bolts.

[0008] In order to improve the reliability of clamping the rotary vane servo and the servo base, a further preferred scheme is: a number of lateral positioning devices are arranged along the circumferential direction between the upper flange of the rotary vane servo and the lower flange of the servo base, and the lateral positioning device includes an inverted L-shaped positioning block, a pair of positioning shafts arranged at the upper position of the inverted L-shaped positioning block and upright downward, and a lateral positioning screw arranged at the lateral position of the inverted L-shaped positioning block, the pair of positioning shafts are respectively inserted into the two pre-drilled holes of the upper flange, and the lateral positioning screws support the outer circle of the lower flange.

[0009] In order to improve the rigidity of the tooling during boring processing, a further preferred solution is: a rigid support device is provided on the positioning plate below the boring machine installation area to prevent the boring machine from vibrating and shifting during boring, and the rigid support device includes a magnetic grip anchor for connecting to the deck ground of the ship, an adjusting screw erected upward at the upper end of the magnetic grip anchor, and a support rod provided at the upper end of the adjusting screw.

[0010] Wherein, the upper end of the support rod bears against the lower end surface of the overhanging portion of the positioning plate to form a rigid support for the positioning plate.

[0011] In the present invention, the magnetic gripping anchor comprises an anchor seat, a number of anchor claws connected to the lower end of the anchor seat, a magnetic seat arranged on each anchor claw, and a magnetic switch is arranged on the magnetic seat; the adjusting screw is threadedly connected to the anchor seat.

[0012] As a further improvement of the present invention, the rigid support device is also provided with an elastic micro-deformation tool-releasing device for boring and retracting the tool, and the elastic micro-deformation tool-releasing device includes a bracket connected to the upper end of the adjusting screw, a positioning ring arranged at the upper end of the bracket, a positioning hole arranged through the center of the positioning ring, and an annular groove arranged on the upper end face of the positioning hole; a rod flange is arranged on the upper part of the support rod, and after the support rod is inserted into the positioning hole, the rod flange abuts against the upper end face of the positioning ring, and a micro-deformation pressurized annular space is formed between the annular groove and the rod flange, and an annular expansion airbag is arranged in the micro-deformation pressurized annular space, and the annular expansion airbag is connected to a manual air pump through a pneumatic pipeline; a dial indicator is arranged on the bracket below the support rod, and the probe of the dial indicator presses upward against the lower end face of the support rod.

[0013] Among them, the manual air pump includes an elastic rubber balloon connected to the pneumatic pipeline for inflating and deflating the annular expansion airbag, an inflation one-way valve arranged on the pneumatic pipeline, a deflation valve arranged on a section of pneumatic pipeline located between the annular expansion airbag and the inflation one-way valve, and an intake one-way valve arranged on the elastic rubber balloon; an extension section is arranged at the lower part of the support rod, the extension section extends to the bottom of the positioning ring, a spring is arranged on the extension section, the lower end of the extension section is connected to a baffle, and the spring is located between the lower end surface of the positioning ring and the upper end surface of the baffle.

[0014] A boring method of a boring tool for a steering gear connecting flange comprises the following steps:

[0015] (1) Hoisting of the steering gear: Hoist the steering gear onto the steering gear base, set a height pad between the upper flange of the steering gear and the lower flange of the steering gear base, install a lateral positioning device on the upper flange of the steering gear, and after adjusting the position of the steering gear, clamp and fix the upper flange of the steering gear, the height pad and the lower flange of the steering gear base with a bow clamp;

[0016] (2) Fixing of the positioning plate: The positioning plate is installed on the upper flange of the steering gear and fixed with bolts and nuts;

[0017] (3) Flange drilling and reaming: A magnetic drill is attached to the positioning plate, and the upper and lower flanges are drilled and reamed at the pre-drilling positions on the flange where boring is required, leaving a certain amount of boring allowance; after drilling and reaming, the magnetic drill is removed;

[0018] (4) Boring machine installation: The boring machine is installed on the positioning plate, and a rigid support device is provided on the positioning plate below the boring machine installation area to prevent the boring machine from vibrating and shifting during boring. The magnetic gripping anchor at the lower end of the rigid support device is adsorbed on the deck floor of the ship, and the support rod at the upper end of the rigid support device supports the positioning plate;

[0019] (5) Boring: Use a boring machine to bore holes, and manually operate the boring machine spindle to bore holes downward;

[0020] (6) Tool withdrawal after boring: Boring can be performed in multiple times. After each downward boring, the tool needs to be withdrawn according to the prescribed steps. The tool withdrawal steps are as follows:

[0021] S1, boring: start the boring machine spindle rotation, manually operate the boring machine spindle to feed downward to bore, and turn off the spindle rotation after boring;

[0022] S2. Tool tip indexing: Manually rotate the boring machine spindle so that the tool tip on the boring machine spindle points to the center axis of the flange;

[0023] S3. Turn on the elastic micro-deformation knife-letting device: The elastic micro-deformation knife-letting device on the rigid support device is activated, and the annular expansion airbag is gradually pressurized by a manual air pump. After the annular expansion airbag is pressurized, it expands to lift the rod flange on the upper part of the support rod, driving the support rod to press the positioning plate upward and causing the tail of the positioning plate away from the flange center axis to tilt upward to form an elastic micro-deformation. The displacement of the support rod pressing upward is detected and controlled by the dial indicator at the lower end of the support rod. Pay attention to controlling the pressurization amount of the manual air pump so that the upward displacement of the support rod does not exceed the set elastic displacement;

[0024] S4, tool retraction: The positioning plate is slightly deformed by the upward pressure of the support rod, causing the boring machine on the positioning plate to tilt as a whole, so that the tool tip on the boring machine spindle is slightly displaced away from the boring surface on the flange. At this time, the boring machine spindle is manually operated to move upward, and the tool tip successfully avoids the boring surface and retracts upward;

[0025] S5, reset: after the knife is retracted, the annular expansion airbag on the manual air pump is controlled to deflate, and after the annular expansion airbag is deflated, the support rod is reset downward by the action of the spring; the rigid support device returns to the normal support state for the positioning plate;

[0026] When a hole needs to be bored multiple times, steps S1 to S5 are repeated to achieve multiple borings.

[0027] After the boring of one hole on the flange is completed, the positioning plate is repositioned and clamped to bore the next hole until all the holes around the flange are bored.

[0028] A further improvement plan is: by replacing the dial indicator with a digital display dial indicator or a displacement sensor with a data transmission interface, replacing the manual air pump with an electric air pump, replacing the motor of the boring machine with a servo motor, and adding a spindle rotation angle encoder for detecting the spindle rotation angle of the boring machine, and connecting the digital display dial indicator (or displacement sensor), the electric air pump, the reversing switch for the up and down movement of the spindle of the boring machine, and the spindle rotation angle encoder to the controller respectively, automatic tool retraction during boring can be achieved: the controller can realize automatic tool retraction during boring by reversing the direction of rotation. After the switch learns that the boring machine spindle has retracted, the tool tip on the boring machine spindle is rotated to point to the center axis of the flange, and the electric air pump is turned on to pressurize the annular expansion airbag, so that the tail of the positioning plate is tilted upward to form an elastic micro-deformation, and the tool tip avoids the surface of the hole when retracting the tool; after the controller learns that the boring machine spindle has retracted through the reversing switch, it controls the electric air pump to deflate the annular expansion airbag, and after the annular expansion airbag is deflated, the support rod is reset downward by the spring; the rigid support device returns to the normal support state for the positioning plate. This further improves the efficiency of the boring operation.

[0029] The beneficial effects of the present invention are:

[0030] First, a boring tool and boring method for a steering gear connecting flange of the present invention, a positioning plate for installing a boring machine, has a compact and simple structure and is easy to install, thereby improving the efficiency and quality of on-site drilling and boring processing.

[0031] Secondly, the boring tool and boring method of the steering gear connecting flange of the present invention are provided with a rigid support device, which can effectively prevent vibration during boring, thereby further improving the quality of boring.

[0032] Third, the boring tool and boring method of the steering gear connecting flange of the present invention, the specially designed lateral positioning device fully utilizes the pre-drilled holes on the upper flange of the steering gear connecting flange for clamping, which solves the possible loosening and displacement problem between the upper flange and the lower flange. The lateral positioning device is easy to use and overcomes the disadvantage of needing to weld lateral positioning blocks on the flange during traditional clamping and fixing.

[0033] Fourthly, in a boring tool and a boring method for a servo connecting flange of the present invention, an elastic micro-deformation tool-releasing device for boring tool withdrawal is provided on a rigid support device. On the one hand, it can effectively avoid scratches on the inner surface of the workpiece boring hole by the tool tip when withdrawing the tool, and on the other hand, it reduces the wear of the tool tip, thereby increasing the service life of the boring tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is one of the structural schematic diagrams of a positioning plate used in a boring tool for a steering gear connecting flange of the present invention;

[0035] Figure 2 This is a second structural schematic diagram of a positioning plate used in a boring tool for a steering gear connecting flange of the present invention;

[0036] Figure 3 yes Figure 1 Schematic diagram of the connection between the structural positioning plate and the steering gear connecting flange;

[0037] Figure 4 yes Figure 2 Schematic diagram of the connection between the structural positioning plate and the steering gear connecting flange;

[0038] Figure 5 It is a structural schematic diagram of a boring tool for a steering gear connecting flange of the present invention;

[0039] Figure 6 It is a structural schematic diagram of a lateral positioning device provided on a servo connection flange;

[0040] Figure 7 yes Figure 5 A partial enlarged schematic diagram of the rigid support device part.

[0041] In the figure: 1, boring machine, 2, positioning plate, 3, flange installation area, 4, boring machine installation area, 5, bolt connection hole, 6, waist-shaped hole, 7, steering gear connection flange, 8, rotary vane steering gear, 9, upper flange, 10, steering gear base, 11, lower flange, 12, pre-drilled hole, 13, bolt, 14, fastening screw, 15, first bolt connection hole, 16, second bolt connection hole, 17, first waist-shaped hole, 18, second waist-shaped hole, 19, third waist-shaped hole, 20, avoidance gap, 21, boring machine spindle, 22, height pad, 23, bow clamp, 24, nut, 25, lateral positioning device, 26, L-shaped positioning block, 27, positioning shaft, 28, lateral positioning screw, 29, rigid support device, 30, ship deck ground, 31, magnetic grip anchor, 32, adjusting screw, 33, support rod, 34, Anchor seat, 35. Anchor claw, 36. Magnetic seat, 37. Magnetic switch, 38. Elastic micro-deformation knife-letting device, 39. Bracket, 40. Positioning ring, 41. Positioning hole, 42. Annular groove, 43. Rod flange, 44. Micro-deformation pressurized annular space, 45. Annular expansion airbag, 46. Pneumatic pipeline, 47. Manual air pump, 48. Dial indicator, 49. Elastic rubber balloon, 50. Inflatable one-way valve, 51. Deflation valve, 52. Inlet one-way valve, 53. Locking nut, 54. Spring, 55. Baffle, 56. Knife tip. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0043] Embodiment 1:

[0044] like Figures 1 to 7 The figure shows an embodiment of a boring tool for a steering gear connecting flange of the present invention, comprising a boring machine 1 and a positioning plate 2 for fixing the boring machine 1, wherein the plate surface of the positioning plate 2 is respectively provided with a flange mounting area 3 for fixingly connecting with the steering gear connecting flange 7 and a boring machine mounting area 4 for fixing the boring machine 1, and the flange mounting area 3 of the positioning plate 2 is provided with a flange mounting area 3 for fixingly connecting with the steering gear connecting flange 7 and a boring machine mounting area 4 for fixing the boring machine 1. A bolt connection hole 5 is provided, and a waist-shaped hole 6 is provided in the boring machine installation area 4 of the positioning plate 2; the steering gear connecting flange 7 includes an upper flange 9 provided on the rotary vane steering gear 8 and a lower flange 11 provided on the steering gear base 10 for connecting with the upper flange 9, and a number of pre-drilled holes 12 are provided on the upper flange 9 along the circumferential direction; the positioning plate 2 is positioned on the plane of the upper flange 9 and is fixed to the upper flange 9 by bolts 13 provided between the bolt connection hole 5 and the pre-drilled hole 12, and the boring machine 1 is positioned on the plane of the boring machine installation area 4 of the positioning plate 2 and is fixed to the positioning plate 2 by fastening screws 14 connected between the boring machine 1 and the waist-shaped hole 6.

[0045] As a preferred solution of a boring tool for a servo connecting flange in this embodiment, the bolt connecting hole 5 includes a first bolt connecting hole 15 and a second bolt connecting hole 16 which are arranged at intervals, and the waist-shaped hole 6 includes a first waist-shaped hole 17, a second waist-shaped hole 18 and a third waist-shaped hole 19 which are arranged dispersedly; an avoidance gap 20 is provided on the positioning plate 2 and at a position between the first bolt connecting hole 15 and the second bolt connecting hole 16, and the avoidance gap 20 is used for the smooth passage of a boring machine spindle 21 during boring.

[0046] In this embodiment, a height spacer 22 is provided between the upper flange 9 of the rotary vane servo 8 and the lower flange 11 of the servo base 10. Before boring, the upper flange 9, the height spacer 22 and the lower flange 11 are clamped and fixed by a bow clamp 23; the positioning plate 2 and the upper flange 9 are fixed by bolts 13 passing through the bolt connection holes 5 and the pre-drilled holes 12, and nuts 24 connecting the bolts 13.

[0047] In order to improve the reliability of clamping the rotary vane servo 8 and the servo base 10, a further preferred scheme is: a number of lateral positioning devices 25 are arranged along the circumferential direction between the upper flange 9 of the rotary vane servo 8 and the lower flange 11 of the servo base 10, and the lateral positioning devices 25 include an inverted L-shaped positioning block 26, a pair of positioning shafts 27 arranged at the upper position of the inverted L-shaped positioning block 26 and upright downward, and a lateral positioning screw 28 arranged at the lateral position of the inverted L-shaped positioning block 26, the pair of positioning shafts 27 are respectively inserted into the two pre-drilled holes 23 of the upper flange 9, and the lateral positioning screws 28 support the outer circle of the lower flange 11.

[0048] In order to improve the rigidity of the tooling during boring processing, a further preferred solution is: a rigid support device 29 is provided on the positioning plate 2 below the boring machine installation area 4 to prevent the boring machine 1 from vibrating and shifting during boring, and the rigid support device 29 includes a magnetic gripping anchor 31 for connecting to the ship deck ground 30, an adjusting screw 32 uprightly arranged at the upper end of the magnetic gripping anchor 31, and a support rod 33 arranged at the upper end of the adjusting screw 32.

[0049] The upper end of the support rod 33 bears against the lower end surface of the overhanging portion of the positioning plate 2 to form a rigid support for the positioning plate 2 .

[0050] In this embodiment, the magnetic gripping anchor 31 includes an anchor seat 34, a number of anchor claws 35 connected to the lower end of the anchor seat 34, and a magnetic seat 36 arranged on each anchor claw 35, and a magnetic switch 37 is arranged on the magnetic seat 36; the adjusting screw 32 is threadedly connected to the anchor seat 34.

[0051] As a further improvement of this embodiment, the rigid support device 29 is also provided with an elastic micro-deformation tool-releasing device 38 for boring the tool. It includes a bracket 39 connected to the upper end of the adjusting screw 32, a positioning ring 40 arranged at the upper end of the bracket 39, a positioning hole 41 penetrating the center of the positioning ring 40, and an annular groove 42 arranged on the upper end surface of the positioning hole 41. A rod flange 43 is arranged on the upper part of the support rod 33. After the support rod 33 is inserted into the positioning hole 41, the rod flange 43 abuts against the upper end surface of the positioning ring 40, and a micro-deformation pressurized annular space 44 is formed between the annular groove 42 and the rod flange 43. An annular expansion airbag 45 is arranged in the micro-deformation pressurized annular space 44, and the annular expansion airbag 45 is connected to a manual air pump 47 through a pneumatic pipeline 46; a dial indicator 48 is arranged on the bracket 39 below the support rod 33, and the probe of the dial indicator 48 presses upward against the lower end surface of the support rod 33.

[0052] Among them, the manual air pump 47 includes an elastic rubber balloon 49 connected to the pneumatic pipeline 46 for inflating and deflating the annular expansion airbag 45, an inflation check valve 50 arranged on the pneumatic pipeline 46, a deflation valve 51 arranged on a section of the pneumatic pipeline between the annular expansion airbag 45 and the inflation check valve 50, and an intake check valve 52 arranged on the elastic rubber balloon 49; the lower part of the support rod 33 is provided with an extension section, the extension section extends to the bottom of the positioning ring 40, the extension section is covered with a spring 54, the lower end of the extension section is connected to a baffle 55, and the spring 54 is located between the lower end surface of the positioning ring 40 and the upper end surface of the baffle 55.

[0053] Embodiment 2:

[0054] A boring method using the boring tool for the steering gear connecting flange of embodiment 1 comprises the following steps:

[0055] (1) Hoisting of the steering gear: hoist the steering gear 8 onto the steering gear base, set a height pad 22 between the upper flange 9 of the steering gear 8 and the lower flange of the steering gear base 10, install a lateral positioning device 25 on the upper flange 9 of the steering gear 8, and after adjusting the position of the steering gear 8, clamp and fix the upper flange 9 of the steering gear 8, the height pad 22 and the lower flange 11 of the steering gear base 10 with a bow clamp 23;

[0056] (2) Fixing of the positioning plate: The positioning plate 2 is mounted on the upper flange 9 of the steering gear 8 and fixed with bolts 13 and nuts 24;

[0057] (3) Drilling and expanding the flange: a magnetic drill is attached to the positioning plate 2, and the upper flange 9 and the lower flange 11 are drilled and expanded at the positions of the pre-drilled holes 12 on the flange where boring is required, leaving a certain amount of boring margin; after drilling and expanding the holes, the magnetic drill is removed;

[0058] (4) Boring machine installation: The boring machine 1 is installed on the positioning plate 2, and a rigid support device 29 is provided on the positioning plate 2 below the boring machine installation area 4 to prevent the boring machine 1 from vibrating and shifting during boring. The magnetic gripping anchor 31 at the lower end of the rigid support device 29 is adsorbed on the deck floor 30 of the ship, and the support rod 33 at the upper end of the rigid support device 29 supports the positioning plate 2;

[0059] (5) Boring: Boring is performed using a boring machine 1, and the main shaft 21 of the boring machine is manually operated to bore downward;

[0060] (6) Tool withdrawal after boring: Boring can be performed in multiple times. After each downward boring, the tool needs to be withdrawn according to the prescribed steps. The tool withdrawal steps are as follows:

[0061] S1, boring: start the boring machine spindle 21 to rotate, manually operate the boring machine spindle 21 to feed downward to bore, and after boring, turn off the spindle rotation;

[0062] S2, tool tip indexing: manually rotating the boring machine spindle 21 so that the tool tip on the boring machine spindle 21 points to the center axis direction of the flange;

[0063] S3, start the elastic micro-deformation knife letting device: activate the elastic micro-deformation knife letting device 38 on the rigid support device 29, gradually pressurize the annular expansion airbag 45 through the manual air pump 47, the annular expansion airbag 45 expands after pressurization, so that the rod flange 43 on the upper part of the support rod 33 is lifted, driving the support rod 33 to press the positioning plate 2 upward and make the tail of the positioning plate 2 away from the flange center axis warp to form an elastic micro-deformation, the displacement of the support rod 33 pressing upward is detected and controlled by the dial indicator 48 at the lower end of the support rod 33, pay attention to control the pressurization amount of the manual air pump 47 so that the upward displacement of the support rod 33 does not exceed the set elastic displacement;

[0064] S4, tool retraction: the positioning plate 2 is slightly deformed by the upward pressure of the support rod 33, so that the boring machine 1 on the positioning plate 2 is tilted as a whole, so that the tool tip 56 on the boring machine spindle 21 is slightly displaced away from the boring surface on the flange. At this time, the boring machine spindle 21 is manually operated to move upward, and the tool tip 56 successfully avoids the boring surface and retracts upward;

[0065] S5, reset: after the knife is retracted, the annular expansion airbag 45 on the manual air pump 47 is controlled to deflate, and after the annular expansion airbag 45 is deflated, the support rod 33 is reset downward by the action of the spring 54; the rigid support device 29 is restored to the normal supporting state for the positioning plate 2;

[0066] When a hole needs to be bored multiple times, steps S1 to S5 are repeated to achieve multiple borings.

[0067] After the boring of one hole on the flange is completed, the positioning plate 2 is repositioned and clamped to bore the next hole until all the holes around the flange are bored.

[0068] A further improvement is: by replacing the dial indicator 48 with a digital display dial indicator or a displacement sensor with a data transmission interface, replacing the manual air pump 47 with an electric air pump, replacing the motor of the boring machine with a servo motor, and adding a spindle rotation angle encoder for detecting the rotation angle of the boring machine spindle 21, and connecting the digital display dial indicator (or displacement sensor), the electric air pump, the reversing switch for the up and down movement of the boring machine spindle 21, and the spindle rotation angle encoder to the controller respectively, automatic tool retraction during boring can be achieved: the controller obtains the boring state through the reversing switch After the boring machine spindle 21 retracts, the tool tip on the boring machine spindle 21 is rotated to point to the center axis of the flange, and the electric air pump is turned on to pressurize the annular expansion airbag 45, so that the tail of the positioning plate 2 is tilted upward to form an elastic micro-deformation, and the tool tip avoids the surface of the hole when retracting the tool; after the controller learns through the reversing switch that the boring machine spindle 21 has completed the tool retracting action, it controls the electric air pump to deflate the annular expansion airbag 45, and after the annular expansion airbag 45 is deflated, the support rod 33 is reset downward by the action of the spring 54; the rigid support device 29 returns to the normal support state for the positioning plate 2. This further improves the efficiency of the boring operation.

[0069] 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 modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A boring tool for a steering gear connecting flange, characterized in that: The invention comprises a boring machine and a positioning plate for fixing the boring machine, wherein the plate surface of the positioning plate is respectively provided with a flange mounting area for fixingly connecting with the steering gear connecting flange and a boring machine mounting area for fixing the boring machine, the flange mounting area of ​​the positioning plate is provided with bolt connecting holes, and the boring machine mounting area of ​​the positioning plate is provided with waist-shaped holes; the steering gear connecting flange comprises an upper flange provided on the rotary vane steering gear and a lower flange provided on the steering gear base for connecting with the upper flange, and a plurality of pre-drilled holes are provided on the upper flange along the circumferential direction; the positioning plate positioning The boring machine is positioned on the plane of the boring machine installation area of ​​the positioning plate and is fixed to the positioning plate by fastening screws connected between the boring machine and the waist-shaped holes; a rigid support device is provided on the positioning plate below the boring machine installation area to prevent the boring machine from vibrating and shifting when boring, and the rigid support device includes a magnetic gripping anchor for connecting to the deck ground of the ship, an upwardly erected magnetic gripping anchor provided on the magnetic gripping anchor, and a magnetic gripping anchor provided on the magnetic gripping anchor. The invention relates to a magnetic ground gripping anchor having an adjusting screw at the upper end thereof and a supporting rod arranged at the upper end thereof; the magnetic ground gripping anchor comprises an anchor seat, a number of anchor claws connected to the lower end of the anchor seat, and a magnetic seat arranged on each anchor claw, wherein a magnetic switch is arranged on the magnetic seat; the adjusting screw is threadedly connected to the anchor seat; the rigid supporting device is also provided with an elastic micro-deformation tool-releasing device for boring and retracting the tool, wherein the elastic micro-deformation tool-releasing device comprises a bracket connected to the upper end of the adjusting screw, a positioning ring arranged at the upper end of the bracket, and a magnetic switch arranged in the positioning ring through the adjusting screw. A positioning hole at the center, an annular groove arranged on the upper end face of the positioning hole, a rod flange is arranged on the upper part of the support rod, and after the support rod is inserted into the positioning hole, the rod flange abuts against the upper end face of the positioning ring, and a micro-deformation pressurized annular space is formed between the annular groove and the rod flange, an annular expansion airbag is arranged in the micro-deformation pressurized annular space, and the annular expansion airbag is connected to a manual air pump through a pneumatic pipeline; a dial indicator is arranged on the bracket below the support rod, and the probe of the dial indicator presses upward against the lower end face of the support rod.

2. The boring tool for the steering gear connecting flange according to claim 1, characterized in that: The bolt connection hole includes a first bolt connection hole and a second bolt connection hole arranged at intervals, and the waist-shaped hole includes a first waist-shaped hole, a second waist-shaped hole and a third waist-shaped hole arranged in a dispersed manner; an avoidance gap is arranged on the positioning plate and located between the first bolt connection hole and the second bolt connection hole, and the avoidance gap is used for the smooth passage of the boring machine spindle during boring.

3. The boring tool for the steering gear connecting flange according to claim 2, characterized in that: A height pad is arranged between the upper flange of the rotary vane servo and the lower flange of the servo base. Before boring, the upper flange, the height pad and the lower flange are clamped and fixed by a bow clamp; the positioning plate and the upper flange are fixed by bolts passing through the bolt connection holes and the pre-drilled holes, and nuts connecting the bolts.

4. The boring tool for the steering gear connecting flange according to claim 1, characterized in that: A number of lateral positioning devices are arranged along the circumferential direction between the upper flange of the rotary vane servo and the lower flange of the servo base, and the lateral positioning devices include an inverted L-shaped positioning block, a pair of positioning shafts arranged at the upper position of the inverted L-shaped positioning block and vertically arranged downward, and lateral positioning screws arranged at the lateral position of the inverted L-shaped positioning block, the pair of positioning shafts are respectively inserted into the two pre-drilled holes of the upper flange, and the lateral positioning screws support the outer circle of the lower flange.

5. The boring tool for the steering gear connecting flange according to claim 1, characterized in that: The manual air pump includes an elastic rubber balloon connected to the pneumatic pipeline for inflating and deflating the annular expansion airbag, an inflation one-way valve arranged on the pneumatic pipeline, a deflation valve arranged on a section of the pneumatic pipeline between the annular expansion airbag and the inflation one-way valve, and an intake one-way valve arranged on the elastic rubber balloon; an extension section is arranged at the lower part of the support rod, the extension section extends to the bottom of the positioning ring, a spring is arranged on the extension section, the lower end of the extension section is connected to a baffle, and the spring is located between the lower end surface of the positioning ring and the upper end surface of the baffle.

6. A boring method using the boring tool for the steering gear connecting flange according to any one of claims 1 to 5, characterized in that: The steps include: (1) Hoisting of the steering gear: Hoist the steering gear onto the steering gear base, set a height pad between the upper flange of the steering gear and the lower flange of the steering gear base, install a lateral positioning device on the upper flange of the steering gear, and after adjusting the position of the steering gear, clamp and fix the upper flange of the steering gear, the height pad and the lower flange of the steering gear base with a bow clamp; (2) Fixing of the positioning plate: The positioning plate is installed on the upper flange of the servo and fixed with bolts and nuts; (3) Flange drilling and reaming: Attach a magnetic drill to the positioning plate, and drill and reame the upper and lower flanges at the pre-drilling positions on the flange where boring is required, leaving a certain amount of boring allowance; remove the magnetic drill after drilling and reaming; (4) Boring machine installation: The boring machine is installed on the positioning plate, and a rigid support device is provided on the positioning plate below the boring machine installation area to prevent the boring machine from vibrating and shifting during boring. The magnetic gripping anchor at the lower end of the rigid support device is adsorbed on the deck floor of the ship, and the support rod at the upper end of the rigid support device supports the positioning plate; (5) Boring: Use a boring machine to bore holes, and manually operate the boring machine spindle to bore holes downward; (6) Retraction after boring: Boring can be performed in multiple times. After each downward boring, the tool needs to be retracted according to the prescribed steps. The retraction steps are as follows: S1, boring: start the boring machine spindle rotation, manually operate the boring machine spindle to feed downward to bore, and turn off the spindle rotation after boring; S2. Tool tip indexing: Manually rotate the boring machine spindle so that the tool tip on the boring machine spindle points to the center axis of the flange; S3. Turn on the elastic micro-deformation knife-letting device: The elastic micro-deformation knife-letting device on the rigid support device is activated, and the annular expansion airbag is gradually pressurized by a manual air pump. After the annular expansion airbag is pressurized, it expands to lift the rod flange on the upper part of the support rod, driving the support rod to press the positioning plate upward and causing the tail of the positioning plate away from the flange center axis to tilt upward to form an elastic micro-deformation. The displacement of the support rod pressing upward is detected and controlled by the dial indicator at the lower end of the support rod. Pay attention to controlling the pressurization amount of the manual air pump so that the upward displacement of the support rod does not exceed the set elastic displacement; S4, tool retraction: The positioning plate is slightly deformed by the upward pressure of the support rod, causing the boring machine on the positioning plate to tilt as a whole, so that the tool tip on the boring machine spindle is slightly displaced away from the boring surface on the flange. At this time, the boring machine spindle is manually operated to move upward, and the tool tip successfully avoids the boring surface and retracts upward; S5, reset: after the knife is retracted, the annular expansion airbag on the manual air pump is controlled to deflate, and after the annular expansion airbag is deflated, the support rod is reset downward by the action of the spring; the rigid support device returns to the normal support state for the positioning plate; When a hole needs to be bored multiple times, steps S1 to S5 are repeated to achieve multiple borings.

7. The boring method of the boring tool for the steering gear connecting flange according to claim 6, characterized in that: After the boring of one hole on the flange is completed, the positioning plate is repositioned and clamped to bore the next hole until all the holes around the flange are bored.

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