CN203542245U - Square sliding pillow support stiffness compensation system of gantry machining center - Google Patents
Square sliding pillow support stiffness compensation system of gantry machining center Download PDFInfo
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- CN203542245U CN203542245U CN201320781963.0U CN201320781963U CN203542245U CN 203542245 U CN203542245 U CN 203542245U CN 201320781963 U CN201320781963 U CN 201320781963U CN 203542245 U CN203542245 U CN 203542245U
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Abstract
The utility model relates to a square sliding pillow support stiffness compensation system of a gantry machining center. The square sliding pillow support stiffness compensation system is formed by a stiffness compensation device, a hydraulic control system and an electric control module. The square sliding pillow support stiffness compensation system is characterized in that the stiffness compensation device comprises a compensation driving plate, a clamping ejection support, a flange guiding sleeve and a guiding pin, the flange guiding sleeve is fixed on the compensation driving plate, the guiding pin is fixed on a sliding saddle structure or a sliding saddle cover plate structure, the compensation driving plate is installed on the guiding pin in a sliding mode through the flange guiding sleeve, M ejection supporting holes are formed in the back plane of the compensation driving plate, a pressurization oil cavity is formed at backs of the ejection supporting holes, pressure oil inlets penetrate through the pressurization oil cavity, the clamping ejection support is a revolution body, a sealing ring installation sink groove is formed in an annular face of the clamping ejection support, and the clamping ejection support is installed in the ejection supporting holes. The hydraulic control system is formed by a machine tool hydraulic station power source part, a hydraulic valve block, a throttle valve, an electromagnetic proportion low pressure reducing valve, a two-position two-way reversing valve, an overflow valve, a pressure gage buffer and a pressure gage, the flow of one branch oil way of the machine tool hydraulic station power source part is adjusted through the overflow valve, pressure adjustment is carried out on the electromagnetic proportion low pressure reducing valve, and pressure oil after the pressure adjustment is connected to the position of the pressure oil inlet of the compensation driving plate through a way separating block. The electric control module comprises a machine tool Z-axis feeding coordinate signal unit, a D/A converter and an open-cycle controller of the electromagnetic proportion low pressure reducing valve. The square sliding pillow support stiffness compensation system which can compensate a micro gap in a self-adaption mode according to the square sliding pillow Z-axis feeding coordinate signals is provided.
Description
Technical field
The utility model relates to machine tool accuracy bucking-out system, especially a kind of for compensating the bucking-out system of gantry machining center side's ram rail plate support stiffness and machine finish.
Background technology
In the heavy process equipments such as large-sized gantry numerical control machining center, vertical turning center, numerical control floor type boring and milling machine, square ram and saddle structure are one of important composition structures.Ram (Ram) is that the parts such as knife rest or main spindle box are housed, and have the pillow functional part that guide rail can move on lathe bed or miscellaneous part, and the guide rail of square ram is exactly himself substantially.The ram of existing heavy process equipment generally adopts square ram structure form, with square ram four sides fine grinding, forms guide pass, forms sliding friction guideway, and accompany by hydrodynamic lubrication or oil lubrication with saddle inner surface.The microgap that sliding friction pair exists, to form lubricating oil film, the precondition of the side's of being beneficial to ram movement, meanwhile, the existence of microgap is also the key factor that affects ram and saddle fit structure, when microgap is too small, can make borderline oil film break, frictional resistance significantly rises, thereby occurs that Digit Control Machine Tool Z axis feeding positioning precision declines, low speed jerking motion phenomenon aggravation, the even bad phenomenon such as locking of smooth, unstable wear of sliding; And when microgap is excessive, contact stiffness between ram and saddle weakens greatly, thereby cause the problems such as processing is trembled, the out-of-flatness of part finished surface, meanwhile, gap width δ itself is the factor of influence of machine finish, and being accompanied by stretching out of ram, gap width δ is amplified at double on the impact of positioning precision, thereby causes the positioning precision of lathe, repetitive positioning accuracy to reduce.
Based on above-mentioned analysis, the control of microgap between square ram and saddle structure value, plays an important role for the overall performance, machining accuracy etc. that promote lathe.The concrete analysis of the assembly structure form between side's ram and saddle, contribute to deepen understanding and a kind of rationally effectively compensation method of proposition that the other side's ram microgap forms reason, for the concrete assembly structure of square ram and saddle, refer to Figure of description 1 and 2, for the analysis of concrete structure, at description, be further described in detail hereinafter.
Summary of the invention
In order to overcome gantry machining center side's ram, adopt rail plate to exist microgap, when the side's of causing ram stretches out, support stiffness declines, degradation problem under machining accuracy decline while causing machine tooling, vibration cutting, piece surface crudy, the utility model proposes a kind of according to square ram Z axis feeding coordinate signal and the square ram support stiffness bucking-out system of adaptive equalization microgap.
The utility model solves the technical scheme that its technical problem adopts:
A kind of gantry machining center side ram support stiffness bucking-out system, by rigidity compensating device, hydraulic control system and electric control module form, it is characterized in that, described rigidity compensating device comprises compensation drive plate, clamping is shored, flange guide pin bushing, pilot pin, described flange guide pin bushing is fixed on described compensation drive plate, described pilot pin is fixed on saddle structure or saddle covering plate structure, described compensation drive plate is slidably arranged on described pilot pin by described flange guide pin bushing, on the back plane of described compensation drive plate, be provided with M and shore hole, the described Kong Houwei pressurization oil pocket of shoring, described pressure oil oil-in will pressurize oil pocket connect, described clamping is shored for revolving body, described clamping is shored and on anchor ring, is provided with sealing ring deep gouge is installed, described clamping is shored described in being arranged on and is shored in hole, described hydraulic control system consists of machine tool hydraulic station power source part, hydraulic valve block, choke valve, solenoid-operated proportional low-pressure relief valve, bi-bit bi-pass reversal valve, overflow valve, pressure ga(u)ge damper and Pressure gauge, described machine tool hydraulic station branch's oil circuit of power source part is after throttle valve adjustment flow, by solenoid-operated proportional low-pressure relief valve, carry out pressure adjusting, the pressure oil after pressure regulates is connected to the pressure oil oil-in place of described compensation drive plate through shunt piece, described electric control module comprises the open-cycle controller of lathe Z axis feeding coordinate signal unit, D/A converter and solenoid-operated proportional low-pressure relief valve.
Further, described clamping is shored for revolving body, and first half section is spherical support, second half section is cylinder, on the ring surface of described cylinder, be provided with sealing ring deep gouge is installed, on described sealing ring installation deep gouge, O RunddichtringO is installed and coordinates back-up ring, or y-type seal ring is installed.
Further again, on the front end face of described compensation drive plate, be " ten " word and be arranged symmetrically with four little gradient wedge shape installed surfaces, gap is adjusted wedge shape filler rod and is fixed on described little gradient wedge shape installed surface by contiguous block; Described rigidity compensating device comprises two block compensation drive plates, one block compensation drive plate is slidably arranged in described saddle structure by flange guide pin bushing, pilot pin structure, and another block compensation drive plate is slidably arranged on described saddle covering plate structure by flange guide pin bushing, pilot pin structure.
As preferred a kind of scheme: on the back plane of described compensation drive plate, be provided with eight and shore hole, described in shore hole and be and be symmetrically arranged.
As preferred another kind of scheme: the control of described hydraulic control system is by choke valve, solenoid-operated proportional low-pressure relief valve is realized, the working connection of machine tool hydraulic station power source part is received ram balancing cylinder, on the actuators such as broaching tool oil cylinder and tool magazine tool changing hydraulic motor, wherein, a branch road of machine tool hydraulic station power source part is connected on the oiler of solenoid-operated proportional low-pressure relief valve after choke valve or throttle orifice throttling, hydraulic oil after pressure regulation is connected respectively to the pressure oil oil-in place of described compensation drive plate by shunt piece, the overfall of described solenoid-operated proportional low-pressure relief valve takes back separately fuel tank after connecing check valve, on the Long-distance Control X mouth of the proportional pilot valve of described solenoid-operated proportional low-pressure relief valve, be connected on the P mouth of bi-bit bi-pass reversal valve, the B mouth of described bi-bit bi-pass reversal valve is connected with overflow valve, A mouth blocks, T mouth takes back draining road.
As preferred another scheme: described electric control module comprises the open-cycle controller of lathe Z axis feeding coordinate signal unit, D/A converter and solenoid-operated proportional low-pressure relief valve.Described lathe Z axis feeding coordinate signal unit comprises Z axis feed servo motor encoder, Machine Tools Electric system, the PLC module of Machine Tools Electric system can be processed Z axis coordinate signal, signal after treatment changes the analog voltage of 0-10V into after D/A converter, and the analog voltage of output changes the analog current of solenoid-operated proportional low-pressure relief valve into after open-cycle controller regulates.
The beneficial effects of the utility model are embodied in:
For gantry machining center side's ram, adopt rail plate to exist microgap, when the side's of causing ram stretches out, support stiffness declines, degradation problem under machining accuracy decline while causing machine tooling, vibration cutting, piece surface crudy, proposed a kind of according to square ram Z axis feeding coordinate signal and the support stiffness bucking-out system of adaptive equalization microgap, field adjustable explanation, this system can effectively improve machine ram support stiffness, the piece surface crudy of improving lathe has certain compensation effect to Machine Tool Positioning Accuracy simultaneously.
Accompanying drawing explanation
Fig. 1 is gantry machining center ram saddle assembly structure schematic diagram
Fig. 2 is the structural representation that wedge shape filler rod and saddle are adjusted in gantry machining center ram, gap
Fig. 3 is rigidity compensating device structure chart of the present utility model
Fig. 4 is rigidity compensating device structure chart of the present utility model (another view)
Fig. 5 is rigidity compensating device structure partial enlarged drawing of the present utility model
Fig. 6 is the utility model hydraulic control system schematic diagram
The specific embodiment
In conjunction with Fig. 1～Fig. 6, before introducing the embodiment of the utility model gantry machining center side ram support stiffness bucking-out system, paper gantry machining center square ram structure, assembly relation and square ram rail plate clearance adjustment method.
Ram and saddle structure adopt rail plate fit form, and its concrete structure is as follows: by reference to the accompanying drawings 1,2, and square ram 1 is arranged in saddle 101, fixing with saddle cover plate 102, forms completely encircle structure.Ram sliding friction on the mating surface of saddle, has four guide supporting faces, wherein on saddle, has two face fine grindings, for datum level, and coordinate with these two faces, form two other face of encircling shape, i.e. working face on another side and saddle cover plate on saddle, for adjusting face in gap.In existing lathe mounting technology, by gap adjust wedge shape filler rod 103 adjust machine ram slide time microgap value δ, this microgap value δ becomes one of restraining factors that affect machine finish.The original gap of ram rail plate is adjusted, and generally adopts at present the artificial method of adjusting, after ram is assembled on saddle, by locked the assembling of saddle cover plate.There is certain gap in saddle inside in ram, adjusts wedge shape filler rod 103 carry out trace adjustment with gap, and main basis for estimation is the resistance to sliding of ram under hydrodynamic lubrication.Concrete method of adjustment and operation principle are shown in accompanying drawing 2, by the adjustment screw on contiguous block 3, make gap adjust wedge shape filler rod 103 and slide on the little gradient wedge shape installed surface of saddle, and adjusting play size, and amount of taper is 1:100.Once original gap has been adjusted, just can not change.Therefore microgap value δ completes gap and adjusts the gap that the adjustment of wedge shape filler rod forms afterwards.
After having introduced the assembly structure of traditional gantry machining center ram, introduce by reference to the accompanying drawings side's ram support stiffness bucking-out system of the present utility model.
A kind of gantry machining center side ram support stiffness bucking-out system, by rigidity compensating device, hydraulic control system and electric control module form, described rigidity compensating device comprises compensation drive plate 2, 2-2 is shored in clamping, flange guide pin bushing 2-1, pilot pin, described flange guide pin bushing 2-1 is fixed on described compensation drive plate, described pilot pin is fixed on saddle structure or saddle covering plate structure, described compensation drive plate is slidably arranged on described pilot pin by described flange guide pin bushing, on the back plane of described compensation drive plate, be provided with M and shore hole 2-3, the described Kong Houwei pressurization oil pocket of shoring, described pressure oil oil-in 2-4 will pressurize oil pocket connect, described clamping is shored for revolving body, described clamping is shored and on anchor ring, is provided with sealing ring deep gouge is installed, described clamping is shored described in being arranged on and is shored in hole, described hydraulic control system consists of machine tool hydraulic station power source part 4-1, hydraulic valve block, choke valve 4-3, solenoid-operated proportional low-pressure relief valve 4-4, bi-bit bi-pass reversal valve 4-5, overflow valve 4-6, pressure ga(u)ge damper and Pressure gauge 4-8, described machine tool hydraulic station branch's oil circuit of power source part is after throttle valve adjustment flow, by solenoid-operated proportional low-pressure relief valve, carry out pressure adjusting, the pressure oil after pressure regulates is connected to the pressure oil oil-in 2-4 place of described compensation drive plate through shunt piece, described electric control module comprises the open-cycle controller 5-3 of lathe Z axis feeding coordinate signal unit, D/A converter 5-2 and solenoid-operated proportional low-pressure relief valve.
Described clamping is shored for revolving body, first half section is spherical support 2-6, and the second half section is cylinder, is provided with sealing ring deep gouge 2-7 is installed on the ring surface of described cylinder, on described sealing ring installation deep gouge, O RunddichtringO is installed and coordinates back-up ring, or y-type seal ring is installed.
On the front end face of described compensation drive plate, be " ten " word and be arranged symmetrically with four little gradient wedge shape installed surface 2-5, gap is adjusted wedge shape filler rod and is fixed on described little gradient wedge shape installed surface by contiguous block 3; Described rigidity compensating device comprises two block compensation drive plates, one block compensation drive plate is slidably arranged in described saddle structure by flange guide pin bushing, pilot pin structure, and another block compensation drive plate is slidably arranged on described saddle covering plate structure by flange guide pin bushing, pilot pin structure.
On the back plane of described compensation drive plate, be provided with eight and shore hole, described in shore hole and be and be symmetrically arranged.
The control of described hydraulic control system is by choke valve 4-3, solenoid-operated proportional low-pressure relief valve 4-4 realizes, the working connection 4-2 of machine tool hydraulic station power source part receives ram balancing cylinder, on the actuators such as broaching tool oil cylinder and tool magazine tool changing hydraulic motor, wherein, a branch road of machine tool hydraulic station power source part is connected on the oiler of solenoid-operated proportional low-pressure relief valve after choke valve or throttle orifice throttling, hydraulic oil after pressure regulation is connected respectively to the pressure oil oil-in place of described compensation drive plate by shunt piece, the overfall of described solenoid-operated proportional low-pressure relief valve takes back separately fuel tank after meeting check valve 4-7, on the Long-distance Control X mouth of the proportional pilot valve of described solenoid-operated proportional low-pressure relief valve, be connected on the P mouth of bi-bit bi-pass reversal valve, the B mouth of described bi-bit bi-pass reversal valve is connected with overflow valve, A mouth blocks, T mouth takes back draining road.
Described electric control module comprises the open-cycle controller of lathe Z axis feeding coordinate signal unit, D/A converter and solenoid-operated proportional low-pressure relief valve.Described lathe Z axis feeding coordinate signal unit comprises Z axis feed servo motor encoder, Machine Tools Electric system, the PLC module 5-1 of Machine Tools Electric system can process Z axis coordinate signal, signal after treatment changes the analog voltage of 0-10V into after D/A converter, and the analog voltage of output changes the analog current of solenoid-operated proportional low-pressure relief valve into after open-cycle controller regulates.
Side's ram support stiffness bucking-out system is carried out adaptive equalization according to Z axis displacement coordinate signal, therefore this system has proposed the requirement of expansion to Electrical Control of Machinery Tools system: Electrical Control of Machinery Tools system can be converted into Z axis displacement coordinate signal the voltage analog signal output of 0～10V, simultaneously, by electrical system PLC processor, can export according to actual condition electrical compensation value or the continuous analog signal of discrete type.
The control signal transitive relation of electric control module is as follows: Z axis coordinate displacement signal is gathered by grating scale or encoder, the signal gathering is sinusoidal wave digital signal, this data signal is directly passed to the PLC module of Machine Tools Electric system, after logical process, by D/A conversion electron module, changed the voltage analog signal of city 0-10V, voltage analog signal is input on the open-cycle controller of solenoid-operated proportional low-pressure relief valve, be output as current analog signal, this current analog signal can be used for driving the electromagnet of solenoid-operated proportional low-pressure relief valve, thereby the force value of the system of setting, the system pressure value of setting up is used for driving clamping shores, thereby realize the backlash compensation that support stiffness strengthens.
Claims (6)
1. gantry machining center side's ram support stiffness bucking-out system, by rigidity compensating device, hydraulic control system and electric control module form, it is characterized in that, described rigidity compensating device comprises compensation drive plate, clamping is shored, flange guide pin bushing, pilot pin, described flange guide pin bushing is fixed on described compensation drive plate, described pilot pin is fixed on saddle structure or saddle covering plate structure, described compensation drive plate is slidably arranged on described pilot pin by described flange guide pin bushing, on the back plane of described compensation drive plate, be provided with M and shore hole, the described Kong Houwei pressurization oil pocket of shoring, described pressure oil oil-in will pressurize oil pocket connect, described clamping is shored for revolving body, described clamping is shored and on anchor ring, is provided with sealing ring deep gouge is installed, described clamping is shored described in being arranged on and is shored in hole, described hydraulic control system consists of machine tool hydraulic station power source part, hydraulic valve block, choke valve, solenoid-operated proportional low-pressure relief valve, bi-bit bi-pass reversal valve, overflow valve, pressure ga(u)ge damper and Pressure gauge, described machine tool hydraulic station branch's oil circuit of power source part is after throttle valve adjustment flow, by solenoid-operated proportional low-pressure relief valve, carry out pressure adjusting, the pressure oil after pressure regulates is connected to the pressure oil oil-in place of described compensation drive plate through shunt piece, described electric control module comprises the open-cycle controller of lathe Z axis feeding coordinate signal unit, D/A converter and solenoid-operated proportional low-pressure relief valve.
2. side's ram support stiffness bucking-out system as claimed in claim 1, it is characterized in that: described clamping is shored for revolving body, first half section is spherical support, second half section is cylinder, on the ring surface of described cylinder, be provided with sealing ring deep gouge is installed, on described sealing ring installation deep gouge, O RunddichtringO is installed and coordinates back-up ring, or y-type seal ring is installed.
3. side's ram support stiffness bucking-out system as claimed in claim 1, it is characterized in that: on the front end face of described compensation drive plate, be " ten " word and be arranged symmetrically with four little gradient wedge shape installed surfaces, gap is adjusted wedge shape filler rod and is fixed on described little gradient wedge shape installed surface by contiguous block; Described rigidity compensating device comprises two block compensation drive plates, one block compensation drive plate is slidably arranged in described saddle structure by flange guide pin bushing, pilot pin structure, and another block compensation drive plate is slidably arranged on described saddle covering plate structure by flange guide pin bushing, pilot pin structure.
4. the square ram support stiffness bucking-out system as described in claim 1 or 2 or 3, is characterized in that: on the back plane of described compensation drive plate, be provided with eight and shore hole, described in shore hole and be and be symmetrically arranged.
5. the square ram support stiffness bucking-out system as described in claim 1 or 2 or 3, it is characterized in that: the control of described hydraulic control system is by choke valve, solenoid-operated proportional low-pressure relief valve is realized, the working connection of machine tool hydraulic station power source part is received ram balancing cylinder, on the actuators such as broaching tool oil cylinder and tool magazine tool changing hydraulic motor, wherein, a branch road of machine tool hydraulic station power source part is connected on the oiler of solenoid-operated proportional low-pressure relief valve after choke valve or throttle orifice throttling, hydraulic oil after pressure regulation is connected respectively to the pressure oil oil-in place of described compensation drive plate by shunt piece, the overfall of described solenoid-operated proportional low-pressure relief valve takes back separately fuel tank after connecing check valve, on the Long-distance Control X mouth of the proportional pilot valve of described solenoid-operated proportional low-pressure relief valve, be connected on the P mouth of bi-bit bi-pass reversal valve, the B mouth of described bi-bit bi-pass reversal valve is connected with overflow valve, A mouth blocks, T mouth takes back draining road.
6. the square ram support stiffness bucking-out system as described in claim 1 or 2 or 3, is characterized in that: described electric control module comprises the open-cycle controller of lathe Z axis feeding coordinate signal unit, D/A converter and solenoid-operated proportional low-pressure relief valve.Described lathe Z axis feeding coordinate signal unit comprises Z axis feed servo motor encoder, Machine Tools Electric system, the PLC module of Machine Tools Electric system can be processed Z axis coordinate signal, signal after treatment changes the analog voltage of 0-10V into after D/A converter, and the analog voltage of output changes the analog current of solenoid-operated proportional low-pressure relief valve into after open-cycle controller regulates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320781963.0U CN203542245U (en) | 2013-11-27 | 2013-11-27 | Square sliding pillow support stiffness compensation system of gantry machining center |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320781963.0U CN203542245U (en) | 2013-11-27 | 2013-11-27 | Square sliding pillow support stiffness compensation system of gantry machining center |
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| CN201320781963.0U Expired - Fee Related CN203542245U (en) | 2013-11-27 | 2013-11-27 | Square sliding pillow support stiffness compensation system of gantry machining center |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798705A (en) * | 2014-12-30 | 2016-07-27 | 武汉重型机床集团有限公司 | Machining compensation method for high-precision hole system of austenitic stainless steel plate part |
| CN113478277A (en) * | 2021-06-30 | 2021-10-08 | 武汉重型机床集团有限公司 | Ram structure driven by oil cylinder |
-
2013
- 2013-11-27 CN CN201320781963.0U patent/CN203542245U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798705A (en) * | 2014-12-30 | 2016-07-27 | 武汉重型机床集团有限公司 | Machining compensation method for high-precision hole system of austenitic stainless steel plate part |
| CN105798705B (en) * | 2014-12-30 | 2018-02-02 | 武汉重型机床集团有限公司 | The processing compensation method of austenitic stainless steel disk-like accessory high-precision porous |
| CN113478277A (en) * | 2021-06-30 | 2021-10-08 | 武汉重型机床集团有限公司 | Ram structure driven by oil cylinder |
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Granted publication date: 20140416 Termination date: 20141127 |
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