CN111618628B - Tool for clamping large-scale Venturi tube free forging blank vertical lathe - Google Patents
Tool for clamping large-scale Venturi tube free forging blank vertical lathe Download PDFInfo
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- CN111618628B CN111618628B CN202010554922.2A CN202010554922A CN111618628B CN 111618628 B CN111618628 B CN 111618628B CN 202010554922 A CN202010554922 A CN 202010554922A CN 111618628 B CN111618628 B CN 111618628B
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- clamping
- milling
- venturi tube
- blank
- vertical lathe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
Abstract
The invention discloses a large-scale Venturi tube free forging blank vertical lathe clamping tool which comprises a hoisting pre-positioning clamp used for hoisting and pre-positioning a Venturi tube forging blank onto a vertical lathe workbench, and a vertical lathe clamping jaw installed on the vertical lathe workbench and used for clamping the excircle of the Venturi tube free forging blank, wherein the vertical lathe clamping jaw comprises a clamping jaw seat used for being connected with the vertical lathe workbench, and a clamping jaw body which is movably clamped and arranged on the clamping jaw seat, a milling tightening component used for cutting into the surface of the Venturi tube free forging blank in a milling mode and tightening the surface of the blank in a propping mode is arranged at the front end part of the clamping jaw body, the milling tightening component comprises a milling cutter disc, and the milling cutter disc is driven to rotate through a motor and a self-locking speed reducing mechanism. The invention improves the efficiency of clamping alignment and cutting, improves the processing quality and increases the processing safety.
Description
Technical Field
The invention relates to the technical field of machining process equipment, in particular to a tool for clamping a large-sized Venturi tube free forging blank by a vertical lathe.
Background
The venturi tube is widely used as a flowmeter in the field of fluid measurement. The high-precision Venturi tube flowmeter matched with the national important special item in a certain large-scale advanced pressurized water reactor and high-temperature gas cooled reactor nuclear power station is made of a stainless steel forging blank (as shown as a part 1 in figure 2) due to high pressure and strict reliability requirements. The stainless steel forging belongs to a multi-variety small-batch manufacturing mode, a blank of the stainless steel forging is manufactured by a free forging method, and a finished part of a Venturi tube is manufactured by machining after the blank is forged.
In the prior art, because the blank surface of the large-sized Venturi tube manufactured by adopting a free forging mode is extremely uneven, when a conventional vertical lathe clamping jaw is used for clamping, the contact between the vertical lathe clamping jaw and the excircle of a workpiece is local point-like contact under most conditions, and the clamping is very unstable; this instability of the clamping can lead to the following problems:
firstly, when leading to pressing from both sides tightly after the work piece alignment easily, the work piece takes place the secondary and shifts, needs constantly repeated alignment to the efficiency of clamping has been reduced.
Secondly, due to the clamping displacement factor, the workpiece can not be accurately aligned, so that the variation difference of the local machining allowance of the excircle of the forge piece is large, the number of feed times is prolonged, the cutting time of the napping leather is increased, and the cutter loss is increased; on the other hand, the situation that the fur cut off from the local area of the excircle of the forge piece is less exists, which easily causes the defect of the shallow surface of the blank which should be cut off to be left on the workpiece, thereby affecting the quality of the product.
And thirdly, because the clamping jaw is not stably contacted with the workpiece, the clamping force is small, and only small cutting amount can be adopted in the machining, the machining efficiency is reduced, and the potential safety hazard that the workpiece is easy to loosen due to the influence of the change of the cutting force is generated in the machining.
Disclosure of Invention
In order to solve the problems, the invention provides a tool for clamping a large-sized Venturi tube free forging blank vertical lathe, and aims to improve the efficiency of clamping alignment and cutting, improve the processing quality and increase the processing safety. The specific technical scheme is as follows:
the utility model provides a frock is used to large-scale venturi forge freely blank merry go round machine clamping, includes and is used for hoist and mount venturi forging blank and prepositioning hoist and mount prepositioning anchor clamps, install to the merry go round machine workstation on be used for the free merry go round machine jack catch that forges blank excircle of clamping venturi, the merry go round machine jack catch is including being used for connecting the jack catch seat, the setting of merry go round machine workstation are in portable tight jack catch body that presss from both sides on the jack catch seat, the front end position of jack catch body is provided with and is used for cutting into the milling tight subassembly in the tight blank surface of free forging of venturi surface and top in the mode of milling, mill the tight subassembly in top of milling includes the milling cutter dish, the milling cutter dish passes through the motor and.
Preferably, hoist and mount prepositioning anchor clamps include two horizontal beams that are cross connection, each the both ends of horizontal beam are respectively erect downwards and are set up vertical landing leg, the lower extreme of vertical landing leg is connected with horizontal leg, the upper portion and the lower part position of vertical landing leg are provided with the holding screw that is used for clamping venturi freely to forge the blank when hoist and mount respectively.
And in order to facilitate hoisting, the horizontal beam is provided with lifting ring screws.
During operation, a workpiece (a large-sized Venturi tube free forging blank) is clamped on the hoisting pre-positioning fixture, the verticality of the workpiece is adjusted through the jacking screw and the workpiece is clamped, then the hoisting pre-positioning fixture and the workpiece are integrally hoisted on the vertical lathe workbench to be pre-positioned, after the central position of the workpiece is adjusted, the hoisting pre-positioning fixture is temporarily fixed on the vertical lathe workbench, then the vertical lathe clamping jaw is operated, the clamping jaw body moves forwards and feeds, a milling cutter disc of a milling jacking assembly arranged on the vertical lathe clamping jaw in a feeding state gradually contacts with the workpiece, the milling cutter disc on the milling jacking assembly mills and jacks the clamping position of the workpiece after contacting with the workpiece, uneven parts on the workpiece are cut off, and the cut surface of the workpiece becomes a clamping surface, so that reliable clamping fixation is formed. And after the four vertical lathe clamping claws complete clamping, removing the hoisting pre-positioning clamp, and then carrying out formal turning.
Among the above-mentioned technical scheme, utilize hoist and mount prepositioning anchor clamps to hoist the work piece and prepositioned, utilize and mill tight subassembly in top and realize cut-in clamping location for the work piece obtains quick location on the merry go round machine workstation, through set up on the portable tight jack catch body of clamp at the merry go round machine jack catch and mill tight subassembly in top, the unevenness department at work piece clamping position is milled and is regarded as the tight clamping locating surface in top, from this stability and the reliability of clamping have been improved by a wide margin, the efficiency of clamping alignment and cutting has been improved, and the processing quality is also improved, and the security of processing has been increased.
In addition, the hoisting pre-positioning clamp is adopted, so that the verticality position of the central axis of the workpiece can be pre-adjusted before the vertical lathe is lifted, and the clamping and adjusting time on the vertical lathe is greatly saved.
As a preferred embodiment of the milling tightening assembly in the present invention, the milling tightening assembly includes a cutter head shaft rotatably disposed at a front end portion of the jaw body through a bearing, and the milling cutter head mounted on the cutter head shaft, the cutter head shaft and the self-locking reduction mechanism are respectively provided with transmission gears engaged with each other, and an input shaft of the self-locking reduction mechanism is connected to the motor.
In the invention, the self-locking type speed reducing mechanism is a worm and gear self-locking type speed reducing mechanism, and the output shaft of the worm and gear self-locking type speed reducing mechanism is connected with the transmission gear.
Preferably, the milling cutter disc is a slotting milling cutter disc.
As one of the preferable schemes of the slotting cutter head, the slotting cutter head is a high-speed steel slotting cutter head.
As a second preferred scheme of the slotting cutter head, the slotting cutter head is a hard alloy insert slotting cutter head.
As a further improvement of the invention, the slotting milling cutter disc comprises a circular cutter disc and a plurality of milling teeth arranged on the excircle of the circular cutter disc, wherein part of the milling teeth are cut off during the manufacturing of the slotting milling cutter disc to form a section of circular cylindrical surface for clamping, and the circular arc radius of the circular cylindrical surface is not less than the milling radius formed on the venturi tube freely forged blank during the milling of the venturi tube freely forged blank by the slotting milling cutter disc.
The circular cylindrical surface for clamping is specially arranged on the slotting cutter head of the milling and jacking assembly, so that after the clamping surface of the workpiece is milled, the workpiece is jacked by the circular cylindrical surface through rotating the slotting cutter head by a certain angle, the clamping is more reliable on one hand, cutter teeth on the slotting cutter head are protected on the other hand, and the service life of the slotting cutter head is prolonged.
In the invention, a power supply quick connection socket is arranged on the motor.
In the invention, the horizontal beam and the vertical supporting leg are connected by welding, and the vertical supporting leg and the horizontal leg are connected by welding.
The invention has the beneficial effects that:
firstly, according to the tool for clamping the large-sized Venturi tube free forging blank vertical lathe, the workpiece is hoisted and pre-positioned by utilizing the hoisting and pre-positioning fixture, the cut-in type clamping and positioning is realized by utilizing the milling and abutting assembly, so that the workpiece is quickly positioned on the vertical lathe workbench, the milling and abutting assembly is arranged on the movable and clamped clamping jaw body of the vertical lathe clamping jaw, and the uneven part of the clamping part of the workpiece is milled and used as a clamping and positioning surface for abutting, so that the stability and reliability of clamping are greatly improved, the clamping and aligning and cutting efficiencies are improved, the processing quality is also improved, and the processing safety is improved.
Secondly, the tool for clamping the large-sized Venturi tube free forging blank by the vertical lathe can preset the verticality position of the central axis of the workpiece before the vertical lathe due to the adoption of the hoisting pre-positioning fixture, so that the clamping and adjusting time on the vertical lathe is greatly saved.
Thirdly, the tool for clamping the large-sized Venturi tube freely forged blank by vertical lathe adopts a special cutter head design, and the circular cylindrical surface for clamping is specially arranged on the groove milling cutter head of the milling and abutting assembly, so that after the clamping surface of the workpiece is milled, the circular cylindrical surface is used for abutting the workpiece by rotating the groove milling cutter head by a certain angle, thereby ensuring that the clamping is more reliable on one hand, protecting cutter teeth on the groove milling cutter head on the other hand, and being beneficial to prolonging the service life of the groove milling cutter head.
Drawings
FIG. 1 is a schematic structural diagram of a fixture for clamping a large-scale Venturi tube free forging blank vertical lathe;
FIG. 2 is a schematic view of the lifting pre-positioning fixture of FIG. 1 (view A-A of FIG. 1);
FIG. 3 is a schematic structural view of a pawl portion of the lift truck of FIG. 1;
fig. 4 is a schematic view of the structure of the milling cutter disc.
In the figure: 1. the method comprises the following steps of (1) freely forging a Venturi tube blank, (2) hoisting and pre-positioning fixtures, (3) a vertical lathe workbench, (4) a vertical lathe clamping jaw, 5, a clamping jaw seat, 6, a clamping jaw body, 7, a milling and jacking assembly, 8, a milling cutter disc, 9, a motor, 10, a self-locking speed reducing mechanism, 11, a horizontal beam, 12, a vertical supporting leg, 13, a horizontal leg, 14, a jacking screw, 15, a lifting ring screw, 16, a bearing, 17, a cutter disc shaft, 18, a transmission gear, 19, a transmission gear, 20, milling teeth, 21, a circular cylindrical surface, 22, a bearing cover, 23 and a circular nut.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 to 4 show an embodiment of the tool for clamping a large-sized venturi tube free forging blank by using a vertical lathe, which includes a hoisting pre-positioning fixture 2 for hoisting and pre-positioning a venturi tube forging blank 1 on a vertical lathe workbench 3, and a vertical lathe jaw 4 installed on the vertical lathe workbench 3 for clamping the excircle of the venturi tube free forging blank 1, wherein the vertical lathe jaw 4 includes a jaw seat 5 for connecting the vertical lathe workbench 3, and a movable clamping jaw body 6 arranged on the jaw seat 5, a milling tightening assembly 7 for cutting into the surface of the venturi tube free forging blank 1 in a milling manner and tightening the surface of the blank is arranged at the front end of the jaw body 6, the milling tightening assembly 7 includes a milling cutter disc 8, and the milling cutter disc 8 is driven to rotate by a motor 9 and a self-locking speed reduction mechanism 10.
Preferably, hoist and mount pre-positioning anchor clamps 2 includes that two are cross connection's horizontal beam 11, each the both ends of horizontal beam 11 are stood downwards respectively and are set up vertical landing leg 12, the lower extreme of vertical landing leg 12 is connected with horizontal leg 13, the upper portion and the lower part position of vertical landing leg 12 are provided with the tightening screw 14 that is used for clamping venturi freely forge blank 1 when hoist and mount respectively.
For the convenience of hoisting, the horizontal beam 11 is provided with a lifting bolt 15.
When in operation, a workpiece (a large-sized Venturi tube freely forged blank 1) is firstly clamped on the hoisting pre-positioning clamp 2, the verticality of the workpiece is adjusted through the jacking screw 14 and the workpiece is clamped, then integrally hoisting the hoisting pre-positioning clamp 2 together with the workpiece to a vertical lathe workbench 3 for pre-positioning, temporarily fixing the hoisting pre-positioning clamp 2 on the vertical lathe workbench 3 after adjusting the central position of the workpiece, then the vertical lathe clamping jaw 4 is operated to enable the clamping jaw body 6 to move forwards for feeding, a milling cutter disc 8 of a milling tightening component 7 arranged on the vertical lathe clamping jaw 4 is gradually contacted with a workpiece in a feeding state, the milling cutter disc 8 on the milling tightening component 7 is contacted with the workpiece and then mills and tightens the clamping part of the workpiece, uneven parts on the workpiece are cut off, so that the cut surface of the workpiece becomes a clamping surface, and reliable clamping and fixing are formed. After the four vertical lathe clamping jaws 4 are clamped, the hoisting pre-positioning fixture 2 is removed, and then formal turning is carried out.
Among the above-mentioned technical scheme, utilize hoist and mount prepositioning anchor clamps 2 to hoist the work piece and prepositioned, utilize to mill tight subassembly 7 in top and realize the cut-in clamping location, make the work piece obtain quick location on merry go round machine workstation 3, through set up on the portable tight jack catch body 6 of clamp at merry go round machine jack catch 4 and mill tight subassembly 7 in top, the unevenness department at work piece clamping position is milled and is regarded as the tight clamping locating surface in top, from this stability and the reliability of clamping have been improved by a wide margin, the efficiency of clamping alignment and cutting has been improved, and the processing quality is also improved, and the security of processing has been increased.
In addition, the hoisting pre-positioning clamp 2 is adopted, so that the verticality position of the central axis of the workpiece can be pre-adjusted before the vertical lathe is lifted, and the clamping and adjusting time on the vertical lathe is greatly saved.
As a preferred embodiment of the milling tightening assembly in this embodiment, the milling tightening assembly 7 includes a cutter head shaft 17 rotatably disposed at a front end portion of the jaw body 6 through a bearing 16, and the milling cutter head 8 mounted on the cutter head shaft 17, the cutter head shaft 17 and the self-locking speed reduction mechanism 10 are respectively provided with transmission gears 19 and 18 engaged with each other, and an input shaft of the self-locking speed reduction mechanism 10 is connected to the motor 9.
In this embodiment, the self-locking reduction mechanism 10 is a worm and gear self-locking reduction mechanism, and the output shaft of the worm and gear self-locking reduction mechanism is connected to the transmission gear 18.
Preferably, the milling cutter disc 8 is a slotting milling cutter disc.
As one of the preferable schemes of the slotting cutter head, the slotting cutter head is a high-speed steel slotting cutter head.
As a second preferred scheme of the slotting cutter head, the slotting cutter head is a hard alloy insert slotting cutter head.
As a further improvement of this embodiment, the slotting cutter disc includes circular cutter disc, sets up a plurality of quantity of milling tooth 20 on the circular cutter disc excircle, and wherein partial milling tooth 20 is cut off and form a section circular cylinder 21 that the clamping was used when the slotting cutter disc was made, circular cylinder 21's circular arc radius R is not less than the slotting cutter disc is in when milling venturi freely forge blank 1 the milling radius that forms on venturi freely forge blank 1.
The round cylindrical surface 21 for clamping is specially arranged on the slotting cutter head of the milling and tightening component 7, so that after the clamping surface of the workpiece is milled, the workpiece is tightened by rotating the slotting cutter head by a certain angle, and the round cylindrical surface 21 is used for tightening the workpiece, so that the clamping is more reliable on one hand, cutter teeth on the slotting cutter head are protected on the other hand, and the service life of the slotting cutter head is prolonged.
In this embodiment, the motor 9 is provided with a power supply quick connection socket.
In this embodiment, the horizontal beam 11 and the vertical leg 12, and the vertical leg 12 and the horizontal leg 13 are connected by welding.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a frock is used to large-scale venturi free forging blank merry go round machine clamping, its characterized in that, including be used for hoist and mount and prepositioning to the hoist and mount prepositioning anchor clamps on the merry go round machine workstation, install be used for the merry go round machine jack catch of the free forging blank excircle of clamping venturi on the merry go round machine workstation, the merry go round machine jack catch is including being used for connecting the jack catch seat, the setting of merry go round machine workstation are in portable tight jack catch body that presss from both sides on the jack catch seat, the front end position of the jack catch body is provided with and is used for cutting into the milling tight subassembly in the free forging blank surface of venturi and the tight blank surface in top with milling mode, mill tight subassembly in top includes the milling cutter dish, the milling cutter dish passes.
2. The tooling for clamping the large-sized Venturi tube free forging blank by the vertical lathe as claimed in claim 1, wherein the hoisting pre-positioning fixture comprises two horizontal beams which are in cross connection, two ends of each horizontal beam are respectively provided with a vertical supporting leg in a downward vertical mode, the lower end of each vertical supporting leg is connected with the corresponding horizontal leg, and the upper portion and the lower portion of each vertical supporting leg are respectively provided with a jacking screw for clamping the Venturi tube free forging blank during hoisting.
3. The tooling for clamping the large-sized Venturi tube free forging blank vertical lathe according to claim 2, wherein a lifting ring screw is arranged on the horizontal beam.
4. The tooling for clamping the large-sized Venturi tube free forging blank vertical lathe according to claim 1, wherein the milling and jacking assembly comprises a cutter disc shaft and a milling cutter disc, the cutter disc shaft is rotatably arranged at the front end of the jaw body through a bearing, the milling cutter disc is arranged on the cutter disc shaft, transmission gears which are meshed with each other are respectively arranged on the cutter disc shaft and the self-locking speed reducing mechanism, and an input shaft of the self-locking speed reducing mechanism is connected with the motor.
5. The tooling for clamping the large-sized Venturi tube free forging blank by the vertical lathe according to claim 4, wherein the self-locking speed reducing mechanism is a worm and gear self-locking speed reducing mechanism, and an output shaft of the worm and gear self-locking speed reducing mechanism is connected with the transmission gear.
6. The tooling for clamping the large-sized Venturi tube free forged blank by vertically turning according to claim 4, wherein the milling cutter disc is a slotting milling cutter disc.
7. The tooling for clamping the large-sized Venturi tube free forged blank by vertically turning according to claim 6, wherein the slot milling cutter disc is a high-speed steel slot milling cutter disc.
8. The tooling for clamping the large-sized Venturi tube free forging blank by vertically turning according to claim 6, wherein the slotting cutter head is a hard alloy tipped slotting cutter head.
9. The frock of claim 7 or 8 for large-scale venturi freely-forged blank merry go round lathe clamping, its characterized in that, the grooving milling cutter dish includes circular blade dish, sets up the milling tooth of a plurality of quantity on the circular blade dish excircle, and wherein partial milling tooth is cut off and is formed one section circular cylinder that the clamping was used when grooving milling cutter dish was made, the circular arc radius of circular cylinder is not less than when grooving milling venturi freely-forged blank the milling radius that forms on the venturi freely-forged blank.
10. The tooling for clamping the large-sized Venturi tube free forged blank vertical lathe according to claim 1, wherein a power supply quick connection socket is arranged on the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010554922.2A CN111618628B (en) | 2020-06-17 | 2020-06-17 | Tool for clamping large-scale Venturi tube free forging blank vertical lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010554922.2A CN111618628B (en) | 2020-06-17 | 2020-06-17 | Tool for clamping large-scale Venturi tube free forging blank vertical lathe |
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| Publication Number | Publication Date |
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| CN111618628A CN111618628A (en) | 2020-09-04 |
| CN111618628B true CN111618628B (en) | 2021-05-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114029766B (en) * | 2021-11-01 | 2023-01-10 | 常州维克托机械制造有限公司 | Rotary speed reducer base milling fixture capable of quickly correcting linkage clamping and using method |
| CN115157007B (en) * | 2022-07-11 | 2023-05-05 | 一重集团(黑龙江)重工有限公司 | Machining allowance analysis method for large cylindrical forging |
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| CN202151702U (en) * | 2011-07-05 | 2012-02-29 | 湖北三江航天险峰电子信息有限公司 | Tool for centring and clamping large-scale rotational part |
| KR20140002244U (en) * | 2012-10-10 | 2014-04-21 | 대우조선해양 주식회사 | Jig for machinining sleeve of rudder stock of ship |
| CN108942367A (en) * | 2018-09-16 | 2018-12-07 | 芜湖德加智能科技有限公司 | A kind of work pieces process machine people's clamp device |
| CN110587349A (en) * | 2019-10-01 | 2019-12-20 | 六安丰恺尼机电科技有限公司 | High-efficiency automatic tool changing process of numerical control machine tool |
| CN210756565U (en) * | 2019-11-14 | 2020-06-16 | 黑龙江鑫源特钢有限公司 | Conversion device for machining small-sized workpiece by large-sized numerical control vertical lathe |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202151702U (en) * | 2011-07-05 | 2012-02-29 | 湖北三江航天险峰电子信息有限公司 | Tool for centring and clamping large-scale rotational part |
| KR20140002244U (en) * | 2012-10-10 | 2014-04-21 | 대우조선해양 주식회사 | Jig for machinining sleeve of rudder stock of ship |
| CN108942367A (en) * | 2018-09-16 | 2018-12-07 | 芜湖德加智能科技有限公司 | A kind of work pieces process machine people's clamp device |
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Address after: 214400 No.1-3 Kailai Road, nanzha street, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: JIANGYIN THROTTLING DEVICE MANUFACTURER Co.,Ltd. Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 214400 No.1-3 Kailai Road, nanzha street, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: JIANGYIN THROTTLING DEVICE MANUFACTURER Co.,Ltd. Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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