An auxiliary support device

Abstract

The present invention provides an auxiliary support device, which mainly consists of a hinged arm assembly, an auxiliary support arm, a tool bar guiding and supporting assembly, an X-direction positioning plate, a Y-direction positioning plate, a Z-direction positioning plate, an X-direction pressing assembly, a Y-direction pressing block, and a Z-direction pressing assembly. The positioning and fixing of the auxiliary support arm are achieved through the positioning plates and pressing assemblies and pressing blocks installed on the left and right sides of the machine tool bed. Then, the installation holes of the auxiliary support arm are used to achieve precise positioning and reliable radial stiffness constraint for the extended tool bar and tapping assembly of the machine tool, thereby providing a strong supporting ability for the extended tool bar and tapping assembly of the machine tool to resist machining loads. The structure of the present invention is simple, the operation is convenient, and the positioning is reliable.

Description

Technical Field

[0001] The present invention relates to an auxiliary support device, and more particularly to an auxiliary support device that can improve the stiffness of machine tools, robots or other special equipment. Background Art

[0002] The reactor pressure vessel is one of the key equipment of the entire nuclear power plant and an important part of the pressure boundary. In order to ensure the safe operation of the reactor pressure vessel, a pressure vessel support structure must be set up to support and fix it. The pressure vessel support structure consists of 4 pressure vessel supports. The CAP1400 reactor type adopts modular construction. After the pressure vessel supports are processed and manufactured, they need to be transported to the nuclear power plant site and fixedly connected to the CA04 module arranged in the concrete through bolts with reamed holes. Since the bolts with reamed holes have very high requirements for the machining accuracy of their installation holes, the installation holes need to be machined on site after the pressure vessel supports are in place on the CA04 module. In this case, the pressure vessel supports and the surrounding modules are all in place, and the space size is limited. Therefore, a new type of special machine tool is needed to complete the machining of the installation holes of the pressure vessel supports.

[0003] A total of 8 installation holes need to be machined on the pressure vessel supports, 4 installation holes on each side. Each installation hole consists of a clearance hole and a threaded hole. There are 3 rib plates arranged on each side of the pressure vessel supports, and 2 installation holes are arranged between the rib plates. The space between the rib plates is very narrow. Since the positioning, installation and fixation of the pressure vessel supports are on the critical path of the nuclear power plant construction, the machining efficiency requirements for the installation holes of the pressure vessel supports are very high, and a large cutting amount is required to machine the installation holes. Therefore, a spindle with a larger size is needed to resist the load during the machining process. Also, due to the very narrow space between the rib plates, the spindle of the machine tool cannot enter the space between the rib plates, and a lengthened tool bar needs to be used to machine the clearance holes. However, after the tool bar is lengthened, its stiffness will be sharply reduced, and the accuracy of the machined clearance holes cannot meet the requirements. Therefore, an auxiliary support device is needed that can accurately and reliably restrain the lengthened tool bar of the machine tool and effectively improve the stiffness of the tool bar to ensure that the accuracy of the machined clearance holes meets the requirements. Since the machine tool also needs to machine threaded holes, the auxiliary support device also needs to provide precise positioning and reaction support for the tapping assembly to machine the threaded holes. Summary of the Invention

[0004] To solve the above problems, the present invention provides an auxiliary support device, which mainly consists of a hinged arm assembly, an auxiliary support arm, a tool bar guiding and supporting assembly, an X-direction positioning plate, a Y-direction positioning plate, a Z-direction positioning plate, an X-direction pressing assembly, a Y-direction pressing block, and a Z-direction pressing assembly. The hinged arm assembly is installed on the fixed shaft of the machine tool and can rotate around the fixed shaft. The auxiliary support arm is installed on the rotating shaft of the hinged arm assembly and can rotate around the rotating shaft. It is positioned by the X-direction positioning plate, Y-direction positioning plate, and Z-direction positioning plate fixed on the left and right sides of the machine tool bed, and the coaxiality constraint between the mounting hole of the auxiliary support arm and the machine tool spindle is realized by pressing through the X-direction pressing assembly, Y-direction pressing block, and Z-direction pressing assembly on the left and right sides of the bed. The tool bar guiding and supporting assembly is installed in the mounting hole of the auxiliary support arm to realize the coaxiality constraint between the tool bar guiding and supporting assembly and the mounting hole of the auxiliary support arm, thereby realizing the coaxiality constraint on the machine tool spindle and finally realizing the coaxiality constraint on the extended tool bar of the machine tool.

[0005] The hinged arm assembly mainly consists of a hinged arm, a bushing, a bearing, a rotating shaft, a locking washer, and a round nut. The bearing is in clearance fit with the inner hole of the hinged arm, and the rotating shaft is in clearance fit with the inner hole of the bearing.

[0006] The shape of the auxiliary support arm is "L", and the structure of the auxiliary support arm is symmetric about the auxiliary support symmetry plane, so that the structure is exactly the same when the auxiliary support arm is installed on the left and right sides of the machine tool bed.

[0007] The auxiliary support arm is provided with an X-direction positioning surface, a Y-direction positioning surface, and a Z-direction positioning surface. Precise positioning of the auxiliary support arm is realized by positioning with the X-direction positioning plate, Y-direction positioning plate, and Z-direction positioning plate, thereby realizing the coaxiality between the mounting hole of the auxiliary support arm and the spindle of the machine tool.

[0008] The auxiliary support arm is provided with a mounting hole, which is in clearance fit with the fixed seat of the tool bar guiding and supporting assembly to realize the coaxiality constraint between the mounting hole and the tool bar guiding and supporting assembly.

[0009] The auxiliary support arm is provided with a mounting hole, and the tapping assembly is installed in the mounting hole and is in clearance fit with the mounting hole to realize the coaxiality constraint between the mounting hole and the tapping assembly and provide a reaction support for tapping.

[0010] The tool bar guiding and supporting assembly mainly consists of a fixed sleeve, an end cover, a bearing, a limit sleeve, a spacer sleeve, and a tool bar sliding sleeve. The bearing is in transition fit with the inner hole of the fixed sleeve, the tool bar sliding sleeve is in clearance fit with the inner hole of the bearing, and the inner hole of the tool bar sliding sleeve is in clearance fit with the extended tool bar of the machine tool to realize the coaxiality constraint between the tool bar guiding and supporting assembly and the extended tool bar of the machine tool. There is a certain distance in the axial direction between the mating surface of the tool bar sliding sleeve and the bearing and the mating surface of the tool bar sliding sleeve and the extended tool bar of the machine tool, effectively improving the stiffness of the extended tool bar of the machine tool.

[0011] The described auxiliary support arm is provided with a pressing inclined surface, and the reliable constraint of the auxiliary support arm in the Y direction is achieved by pressing with the Y-direction pressing block.

[0012] The described X-direction pressing assembly is mainly composed of a pressing plate and screws. The screws are installed on the pressing plate, and the reliable constraint of the auxiliary support arm in the X direction is achieved by pressing the auxiliary support arm with the screws.

[0013] The described Z-direction pressing assembly is mainly composed of a fixed seat, a pressing plate, bolts, and screws. The pressing plate is installed on the fixed seat through bolts, and the reliable constraint of the auxiliary support arm in the Z direction is achieved by pressing the pressing plate with screws and then making the pressing plate press the auxiliary support arm.

[0014] The present invention has the following beneficial effects:

[0015] It can achieve precise positioning and reliable radial stiffness constraint of the machine tool's extended tool bar and tapping assembly, and can provide a strong supporting ability for the machine tool's extended tool bar and tapping assembly to resist machining loads. The structure of the present invention is simple, the operation is convenient, and the positioning is reliable. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments.

[0017] Figure 1 It is a schematic diagram of the pressure vessel support structure according to the embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the pressure vessel support according to the embodiment of the present invention.

[0019] Figure 3 It is a simplified diagram of the swing mechanism of the auxiliary support device according to the embodiment of the present invention.

[0020] Figure 4 It is a schematic diagram of the auxiliary support device entering / leaving the pressure vessel support according to the embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the tool bar entering / leaving the auxiliary support device according to the embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of the auxiliary support device installed in the drilling state on the right side of the bed according to the embodiment of the present invention.

[0023] Figure 7 It is a schematic diagram of the auxiliary support device installed in the drilling state on the left side of the bed according to the embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the auxiliary support device installed in the tapping state on the right side of the bed according to the embodiment of the present invention.

[0025] Figure 9 Schematic diagram of the auxiliary support device of the embodiment of the present invention in the tapping state installed on the left side of the bed

[0026] Figure 10 Schematic diagram of the X-direction positioning plate, Y-direction positioning plate, Z-direction positioning plate, and Z-direction pressing assembly of the embodiment of the present invention installed on the right side of the bed

[0027] Figure 11 Schematic diagram of the X-direction positioning plate, Y-direction positioning plate, Z-direction positioning plate, and Z-direction pressing assembly of the embodiment of the present invention installed on the left side of the bed

[0028] Figure 12 Schematic diagram of the articulated arm assembly of the embodiment of the present invention

[0029] Figure 13 Front view of the auxiliary support arm of the embodiment of the present invention

[0030] Figure 14 Top view of the auxiliary support arm of the embodiment of the present invention

[0031] Figure 15 Schematic diagram of the tool bar guiding and supporting assembly of the embodiment of the present invention

[0032] Figure 16 Schematic diagram of the X-direction pressing assembly of the embodiment of the present invention

[0033] Figure 17 Schematic diagram of the Z-direction pressing assembly of the embodiment of the present invention

[0034] Figure 18 Schematic diagram of the Y-direction pressing block pressing the auxiliary support arm of the embodiment of the present invention

[0035] In the figure, 1 is the articulated arm assembly, 2 is the auxiliary support arm, 3 is the X-direction pressing assembly, 4 is the Y-direction pressing block, 5 is the Z-direction pressing assembly, 6 is the tool bar guiding and supporting assembly, 7 is the X-direction positioning plate, 8 is the Z-direction positioning plate, 9 is the Y-direction positioning plate, 10 is the round nut, 11 is the screw, 12 is the bolt, 13 is the fixed shaft, 14 is the bed, 15 is the machine tool extended tool bar, 16 is the main shaft, 17 is the tapping tool bar, 18 is the tapping assembly.

[0036] 101 is the bushing, 102 is the articulated arm, 103 is the round nut, 104 is the stop washer, 105 is the bearing, 106 is the rotating shaft.

[0037] 201 is the rotating shaft mounting hole, 202 is the Z-direction positioning surface, 203 is the X-direction positioning surface, 204 is the pressing inclined surface, 205 is the Y-direction positioning surface, 206 is the mounting hole.

[0038] 301 is the pressing plate, 302 is the screw.

[0039] 501 Fixed seat, 502 Bolt, 503 Screw, 504 Pressure plate.

[0040] 601 Fixed sleeve, 602 Bearing, 603 Limit sleeve, 604 Tool bar sliding sleeve, 605 Screw, 606 End cover. Detailed implementation mode

[0041] To make the objectives, features and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0042] See Figure 3 、 Figure 4 , the articulated arm assembly 1 can rotate around the fixed shaft 13, the auxiliary support 2 can rotate with the rotating shaft 106, and the machine tool extended tool bar 15 can slide in the mounting hole 206 of the auxiliary support 2.

[0043] See Figures 10 - 11 , the Z-direction pressing assembly 5 is installed on the bed 14 through the bolt 12, and the X-direction positioning plate 7, Z-direction positioning plate 8, and Y-direction positioning plate 9 are installed on the bed 14 through the screw 11.

[0044] See Figure 12 , the bushing 101 and the bearing 105 are installed in the inner hole of the articulated arm 102. The bushing 101 is in interference fit with the inner hole of the articulated arm 102, and the bearing 105 is in clearance fit with the inner hole of the articulated arm 102. The rotating shaft 106 is installed in the inner hole of the bearing 105 through the round nut 103 and the stop washer 104. The rotating shaft 106 is in clearance fit with the inner ring of the bearing 105, and the rotating shaft 106 can rotate around its own axis.

[0045] See Figure 15 , the bearing 602 is installed in the inner hole of the fixed sleeve 601. The bearing 602 is in transitional fit with the inner hole of the fixed sleeve 601. The limit sleeve 603 is installed between the bearings 602. The end cover 606 is installed on the fixed sleeve 601 through the screw 605. The tool bar sliding sleeve 604 is installed in the inner hole of the bearing 602, and the tool bar sliding sleeve 604 is in clearance fit with the inner hole of the bearing 602.

[0046] See Figure 16 , the screw 302 is installed on the pressing plate 301.

[0047] See Figure 17 , the pressure plate 504 is installed on the fixed seat 501 through the bolt 502, and the screw 503 is installed on the fixed seat 501.

[0048] See Figures 5 - 7 、 Figures 10 - 18, the articulated arm assembly 1 is installed on the machine tool through the fixed shaft 13. The articulated arm assembly 1 can rotate around the fixed shaft 13. The auxiliary support arm 2 is installed on the rotating shaft 106 of the articulated arm assembly 1 through the round nut 10. The auxiliary support arm 2 can rotate with the rotating shaft 106. The X-direction pressing component 3, the Y-direction pressing block 4, and the Z-direction pressing component 5 are installed on the bed body 14 through the bolts 12. The tool bar guiding and supporting component 6 is installed in the mounting hole 206 of the auxiliary support arm 2. The fixed sleeve 601 of the tool bar guiding and supporting component 6 has a clearance fit with the mounting hole 206 of the auxiliary support arm 2. The machine tool extended tool bar 15 is installed on the main shaft 16 through the bolts 12. The machine tool extended tool bar 15 is coaxial with the main shaft 16.

[0049] The X-direction positioning surface 203, the Y-direction positioning surface 205, and the Z-direction positioning surface 202 of the auxiliary support arm 2 are respectively positioned with the X-direction positioning plate 7, the Y-direction positioning plate 9, and the Z-direction positioning plate 8 installed on the bed body, and the auxiliary support arm is pressed by the screw 302 on the X-direction pressing component 3, the Y-direction pressing block 4, and the pressing plate 504 of the Z-direction pressing component 5, so as to realize the coaxiality constraint between the mounting hole 206 on the auxiliary support arm 2 and the main shaft 16. Furthermore, the coaxiality constraint between the tool bar sleeve 604 on the tool bar guiding and supporting component 6 and the main shaft 16 is realized, and finally the coaxiality constraint on the machine tool extended tool bar 15 is realized. There is a certain distance in the axial direction between the mating surface of the tool bar sleeve 604 and the bearing 602 on the tool bar guiding and supporting component 6 and the mating surface of the tool bar sleeve 604 and the machine tool extended tool bar 15, effectively improving the stiffness of the machine tool extended tool bar.

[0050] See Figures 8 - 18 , the articulated arm assembly 1 is installed on the machine tool through the fixed shaft 13. The articulated arm assembly 1 can rotate around the fixed shaft 13. The auxiliary support arm 2 is installed on the rotating shaft 106 of the articulated arm assembly 1 through the round nut 10. The auxiliary support arm 2 can rotate with the rotating shaft 106. The X-direction pressing component 3, the Y-direction pressing block 4, and the Z-direction pressing component 5 are installed on the bed body 14 through the bolts 12. The tapping component 18 is installed in the mounting hole 206 of the auxiliary support arm 2. The tapping component 18 has a clearance fit with the mounting hole 206 of the auxiliary support arm 2. The tapping tool bar 17 is installed on the main shaft 16 through the bolts 12. The tapping tool bar 17 is coaxial with the main shaft 16.

[0051] The X-direction positioning surface 203, Y-direction positioning surface 205, and Z-direction positioning surface 202 of the auxiliary support arm 2 are respectively positioned with the X-direction positioning plate 7, Y-direction positioning plate 9, and Z-direction positioning plate 8 installed on the bed, and the auxiliary support arm is pressed by the screw 302 on the X-direction pressing assembly 3, Y-direction pressing block 4, and the pressing plate 504 of the Z-direction pressing assembly 5, so as to realize the coaxiality constraint between the mounting hole 206 on the auxiliary support arm 2 and the main shaft 16, and then realize the coaxiality constraint between the tapping assembly 18 and the main shaft 16, and finally realize the coaxiality constraint of the tapping assembly 18. The tapping assembly is installed in the mounting hole 206 of the auxiliary support arm 2 through the bolt 12 to provide a reaction support for tapping.

[0052] As can be seen from the above embodiments, the auxiliary support device proposed in the embodiments of the present invention has the following advantages:

[0053] It can realize the precise positioning and reliable radial stiffness constraint of the extended tool bar and the tapping assembly of the machine tool, and can provide a strong supporting ability for the extended tool bar and the tapping assembly of the machine tool to resist the machining load. The structure of the present invention is simple, the operation is convenient, and the positioning is reliable.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An auxiliary support device, characterized in that It is mainly composed of a hinged arm assembly, an auxiliary support arm, a tool bar guiding and supporting assembly, an X-direction positioning plate, a Y-direction positioning plate, a Z-direction positioning plate, an X-direction pressing assembly, a Y-direction pressing block, and a Z-direction pressing assembly. The hinged arm assembly is installed on the fixed shaft of the machine tool and can rotate around the fixed shaft. The auxiliary support arm is installed on the rotating shaft of the hinged arm assembly and can rotate around the rotating shaft. It is positioned by the X-direction positioning plate, Y-direction positioning plate, and Z-direction positioning plate fixed on the left and right sides of the machine tool bed, and the coaxiality constraint between the installation hole of the auxiliary support arm and the main shaft of the machine tool is realized by pressing through the X-direction pressing assembly, Y-direction pressing block, and Z-direction pressing assembly on the left and right sides of the bed. The tool bar guiding and supporting assembly is installed in the installation hole of the auxiliary support arm to realize the coaxiality constraint between the tool bar guiding and supporting assembly and the installation hole of the auxiliary support arm, thereby realizing the coaxiality constraint of the main shaft of the machine tool, and finally realizing the coaxiality constraint of the extended tool bar of the machine tool. The auxiliary support arm is provided with an X-direction positioning surface, a Y-direction positioning surface, and a Z-direction positioning surface, and precise positioning of the auxiliary support arm is realized by positioning with the X-direction positioning plate, Y-direction positioning plate, and Z-direction positioning plate, so as to realize the coaxiality between the installation hole of the auxiliary support arm and the main shaft of the machine tool. The tool bar guiding and supporting assembly is mainly composed of a fixed sleeve, an end cover, a bearing, a limit sleeve, a spacer sleeve, and a tool bar sliding sleeve. The bearing is in transitional fit with the inner hole of the fixed sleeve, the tool bar sliding sleeve is in clearance fit with the inner hole of the bearing, and the inner hole of the tool bar sliding sleeve is in clearance fit with the extended tool bar of the machine tool to realize the coaxiality constraint between the tool bar guiding and supporting assembly and the extended tool bar of the machine tool. There is a certain distance in the axial direction between the mating surface of the tool bar sliding sleeve and the bearing and the mating surface of the tool bar sliding sleeve and the extended tool bar of the machine tool, effectively improving the stiffness of the extended tool bar of the machine tool. The auxiliary support arm is provided with a pressing inclined surface, and reliable constraint in the Y direction of the auxiliary support arm is realized by pressing with the Y-direction pressing block. The X-direction pressing assembly is mainly composed of a pressing plate and a screw. The screw is installed on the pressing plate, and reliable constraint in the X direction of the auxiliary support arm is realized by pressing the auxiliary support arm with the screw. The Z-direction pressing assembly is mainly composed of a fixed seat, a pressing plate, a bolt, and a screw. The pressing plate is installed on the fixed seat through the bolt, and reliable constraint in the Z direction of the auxiliary support arm is realized by pressing the pressing plate with the screw and then pressing the auxiliary support arm with the pressing plate.

2. The auxiliary support device according to claim 1, wherein The hinged arm assembly is mainly composed of a hinged arm, a bushing, a bearing, a rotating shaft, a locking washer, and a round nut. The bearing is in clearance fit with the inner hole of the hinged arm, and the rotating shaft is in clearance fit with the inner hole of the bearing.

3. An auxiliary support device according to claim 1, characterized in that The shape of the auxiliary support arm is "L", and the structure of the auxiliary support arm is symmetric about the auxiliary support symmetry plane, so that the structure is completely the same when the auxiliary support arm is installed on the left and right sides of the machine tool bed.

4. An auxiliary support device according to claim 1, characterized in that The auxiliary support arm is provided with an installation hole, and the installation hole is in clearance fit with the fixed seat of the tool bar guiding and supporting assembly to realize the coaxiality constraint between the installation hole and the tool bar guiding and supporting assembly.

5. An auxiliary support device according to claim 1, characterized in that The auxiliary support arm is provided with an installation hole, and the tapping assembly is installed in the installation hole and is in clearance fit with the installation hole to realize the coaxiality constraint between the installation hole and the tapping assembly and provide a reaction support for tapping.

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