CN202517333U - Ram deflection compensation mechanism for heavy numerical-control floor-type milling-boring machine - Google Patents
Ram deflection compensation mechanism for heavy numerical-control floor-type milling-boring machine Download PDFInfo
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- CN202517333U CN202517333U CN201120520797XU CN201120520797U CN202517333U CN 202517333 U CN202517333 U CN 202517333U CN 201120520797X U CN201120520797X U CN 201120520797XU CN 201120520797 U CN201120520797 U CN 201120520797U CN 202517333 U CN202517333 U CN 202517333U
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Abstract
The utility model discloses a ram deflection compensation mechanism for a heavy numerical-control floor-type milling-boring machine. Pull rods are adopted for carrying out compensation on deflection deformation. The ram deflection compensation mechanism is characterized in that two long thin pull rods are arranged at two upper corners inside a ram; hydraulic oil cylinders for providing pull force are fixed at the rear end of the ram; the ram, the pull rods and the oil cylinders are combined in series by the pull rods and the pull rods are fixed by sleeve nuts at the rear ends of the hydraulic oil cylinders; a sleeve is arranged between each pull rod and each piston so as to connect the pull rod with the piston; each sleeve and the corresponding pull rod are fixed to one body by a nut at the rear end of the corresponding pull rod; each pull rod and the corresponding piston do not move relatively; baffle rings are embedded between each sleeve and the corresponding piston in pairs so as to fix the sleeve and the corresponding piston; and the pull rods are driven by the pistons, so that backward pull force is generated by the ram to compensate the ram for bending formation caused by gravity. By the designed sleeves, a strict technology of processing an annular groove is omitted and the booster-type oil cylinders meet the requirement on small size. By use of the ram deflection compensation mechanism, the automatic compensation for the moving straightness of the ram can be realized and meanwhile the moving straightness of a main shaft can also be improved obviously.
Description
Technical field
The present invention relates to mechanical production devices, a kind of ram deflection compensation mechanism that is used for heavy type numerical control console mode milling-boring machine.
Technical background
In recent years; Develop rapidly along with industries such as the energy, metallurgy, engineering machinery; Many key components and parts of these industry fields all are tending towards maximization, complicated, and each machined surface permissible accuracy is also very high, and this just requires the emphasis of Metal Cutting Machine Tool development mainly to concentrate on high pulling torque; Big stroke, high-precision heavy machine tool.
Numerical control floor formula milling-boring machine is a kind of universal machine that is used for large parts machining; Be widely used in industries such as the energy, metallurgy, engineering machinery; Its topmost architectural feature one is to adopt upright supports, the 2nd, constitute the cantilevered moving component by main spindle box and ram.Heavy type numerical control console mode milling-boring machine is meant that the main shaft diameter is not less than 160mm, and ram stroke is not less than 1200mm, and (it is big stroke ram that stroke is not less than 1200mm) travel of spindle is not less than the console mode milling-boring machine of 1000mm.And big stroke ram when stretching out because self deadweight causes flexural deformation, thereby have influence on machine tool accuracy.Deformation-compensated problem for big stroke ram is the main difficult point of console mode milling-boring machine manufacturing technology thus.
At present; The solution ram stretches out the main compensation method of distortion and comprises: 1. utilize prestressing force deflection processing mode to realize deflection compensation; Adopt numerical-control processing method that the crushed element of ram is processed removal in advance; Make ram when work is stretched out, be in straightened condition, this method can produce certain compensation effect, but higher to the processing and the matching requirements of ram; 2. realize the method for ram deflection compensation through machine tool numerical control system, this method utilizes digital control system to detect the ram amount of deflection automatically, realize compensation through the corresponding displacement of rising of control Y axle, but it has only compensated the amount of deflection of ram, and the flexural deformation of ram is not considered; 3. adopting the electric-hydraulic proportion control mode that ram is bowed compensates; Though obtained certain compensation effect; But electric-hydraulic proportion control needs accurately to hold the warping function in each stage of ram, for the ram of rapid movement, tends to occur very big deviation; 4. adopt hydraulic pressure center of gravity eccentricity compensation method, a counterweight is installed respectively before and after main spindle box is bowed because of the main spindle box center of gravity changes the ram that causes with balance, this method is simple to operate, and the ram that still causes because of the ram self gravitation is bowed and thoroughly do not solved.If the amount of deflection of ram can not well solve, then when main shaft stretches out, the flexural deformation of ram effect that main shaft has been dangled and amplified undoubtedly, thus influenced the linearity of main axle moving.Therefore, heavy type numerical control console mode milling-boring machine needs a kind of mechanism of simple and easy practicality to realize the automatic compensation of big stroke ram distortion.
Summary of the invention
The ram deflection compensation mechanism that the purpose of this invention is to provide a kind of heavy type numerical control console mode milling-boring machine; Apply a kind of external applied load to ram; Flexural deformation equal and opposite in direction that generation and gravity cause and distortion in the opposite direction; Balance and cause the gravity that is out of shape, the problem of deflection deformation when solving the big stroke ram of heavy type numerical control console mode milling-boring machine and stretching out.
A kind of ram deflection compensation mechanism of heavy type numerical control console mode milling-boring machine; It is characterized in that adopting the pull bar penalty method to apply a kind of external applied load to ram; Deflection deformation is compensated: two jiaos two elongated pull bars are installed in the ram inner and upper; Provide the hydraulic jack of pulling force to be fixed on the ram rear end to pull bar, pull bar utilizes hydraulic jack rear end sleeve nut to be fixed after with ram, pull bar, oil cylinder three string group; Sleeve of design plays the effect that is connected between piston and the pull bar between pull bar and piston, and being fixed at back end of tie rod through nut between sleeve and the pull bar is one; Do not have relative motion between pull bar and the piston, piston and sleeve are fixed through the baffle ring on the piston; Hydraulic oil enters into two groups of oil pockets drive pistons through pipe joint and in oil cylinder, does axially small reciprocatingly sliding, and drives pull bar and makes ram produce a pulling force backward, compensates the flexural deformation that ram causes because of gravity through the adjustment draw-bar pull.
Under the effect of annex gravity such as ram self and main shaft; Ram must produce deflection deformation in the process of stretching out; Therefore the thinking of ram deflection compensation of the present invention is exactly: apply a kind of external applied load to ram and produce the flexural deformation equal and opposite in direction that causes with gravity and distortion in the opposite direction, balance and cause the gravity that is out of shape.Consider that pull bar is longer, and that the used cannelure of installation and processing oil sealing requires process equipment and processing method is tighter,, plays the effect of transition pull bar and piston so design a sleeve.Because the space, cross section of ram is limited, oil cylinder can not be done too greatly, and the pressure of simultaneity factor also can not infinitely improve, and therefore adopts the booster-type oil cylinder.
Characteristics of the present invention are can not only realize that through the ram deflection compensation mechanism ram moves the automatic compensation of linearity; The mobile linearity of main shaft also can significantly promote simultaneously; After solving like the amount of deflection problem of ram, because of the material of main shaft is a special substance, rigidity is stronger; The self-deformation amount is little, and then the amount of deflection problem of main shaft also is readily solved.
Description of drawings
Fig. 1 is the numerical control floor formula milling-boring machine structural representation of prior art;
Fig. 2 is the inner duplex pull rod mounting arrangements of a ram of the present invention sketch map;
Fig. 3 is an oil cylinder internal structure sketch map of the present invention;
Fig. 4 is a tube-in-tube structure sketch map of the present invention;
Fig. 5 is a baffle ring structural representation of the present invention.
The specific embodiment
Existing numerical control floor formula milling-boring machine structure is seen Fig. 1, the vertical column 2 of installing on bottom lathe bed 1 and the slide 6, and a side elevation upside of column 2 is hung main spindle box 3, and the ram 4 of level plays the effect that connects main spindle box 3 and main shaft 5 in numerical control floor formula milling-boring machine.Ram 4 monnolithic cases are cuboid, and axially the four sides is guide pass, inner milling spindle and the boring axle installed.Ram and boring axle can be done fore-and-aft direction and move, and when ram and boring shaft extension go out when longer, ram will produce flexural deformation.
The ram deflection compensation mechanism of this heavy type numerical control console mode milling-boring machine of the present invention; Two pull bars 9 are installed at the two jiaos of places of inner and upper that it is characterized in that the ram square in the cross section 4; The mounting arrangements of duplex pull rod 9 and oil cylinder 7 is seen Fig. 2; Pull bar 9 front ends are fixing with ram 4 through rod nut 10, and two pull bar 9 rear ends are installed hydraulic jack 7 respectively, and are radially fixing according to matched in clearance between two jiaos behind hydraulic jack 7 and the ram 4; Final through pull bar 9 with ram 4, pull bar 9, oil cylinder 7 string groups after, utilize the sleeve nut 8 of hydraulic jack 7 rear ends that angle on pull bar 9 rear ends and ram 4 rear ends two is fixed as one; Gland 20 and screw 21 connected the back and form airtight oil cylinder before cylinder body 19 two ends reached through rear pressing cover 12.
The oil cylinder internal structure is seen Fig. 3; It is characterized in that sleeve 16 of design between pull bar 9 and piston 18; Play the effect that is connected between piston and the pull bar, avoided the used cannelure of traditional pull bar installation and processing oil sealing process equipment and processing method are required tighter problem.Sleeve 16 structures are seen Fig. 4, and sleeve 16 outer walls have a plurality of oil seal groove 17a, embed oil seal washer 17b, connect pistons 18 and pull bars 9 through sleeve 16, and being fixed in pull bar 9 rear ends by sleeve nut 8 between sleeve 16 and the pull bar 9 is one.Do not have relative motion between pull bar 9 and the piston 18, both fix with piston 18 and sleeve 16 through the baffle ring 15b on the piston 18, and baffle ring 15b is two semicircle steel discs; Baffle ring 15b shape is seen Fig. 5; The baffle ring draw-in groove 15a internal diameter of its internal diameter and sleeve 16 outer walls is identical, see Fig. 4, and its radial height is greater than the sleeve 16 external diameter upper baffle ring draw-in groove 15a degree of depth, and baffle ring 15b embeds between sleeve 16 and the piston 18 in pairs; It is static relatively to guarantee both, the ingenious fixation problem of piston 18 with sleeve 16 that solved.Oil cylinder 7 is pressurizing cylinder: promptly the axial direction at cylinder body 19 inner carriers 18 places has added two groups of oil pockets 14, and pressure is multiplied, to guarantee the required pressure of ram deflection compensation mechanism.Cylinder body 19 two ends connect the back through rear pressing cover 12, preceding gland 20 and screw 21 and form airtight oil cylinder.There is relative motion between piston 18 and the oil cylinder 7; Carry out oil pressure sealing (sealing of many places oil pressure) by high resiliency oil sealing 13 between the two, little matched in clearance, hydraulic oil enters into two groups of oil pockets 14 through pipe joint 11; Piston 18 is done small reciprocatingly sliding in oil cylinder 7; Drive pull bar 9 and make ram 4 produce a pulling force backward, compensate the flexural deformation that ram causes because of gravity through the adjustment draw-bar pull, and then the ram amount of deflection is compensated.
Along with the difference of ram extension elongation, ram also different from deformation values.Therefore the pulling force that has only pull bar installs the size that an electro-hydraulic proportional valve is controlled oil cylinder working-pressure additional along with respective change could satisfy instructions for use on hydraulic circuit.Oil pressure is output as 0-100bar, and maximum provides pulling force 30kN thousand Ns.Along with stretching out of ram, electro-hydraulic proportional valve control oil pressure increases gradually.Controlled pressure reduced when on the contrary, ram bounced back.So just guaranteed that ram linearity of itself when each position is constant, thereby guaranteed the mobile accuracy of ram.
Claims (5)
1. the ram deflection compensation mechanism of a heavy type numerical control console mode milling-boring machine; Apply a kind of external applied load to ram and produce the flexural deformation equal and opposite in direction that causes with gravity and distortion in the opposite direction; It is characterized in that two jiaos two elongated pull bars (9) being installed in ram (4) inner and upper; A design sleeve (16) between pull bar (9) and piston (18); Play the effect that is connected between piston (18) and the pull bar (9), being fixed in pull bar (9) rear end by sleeve nut (8) between sleeve (16) and the pull bar (9) is one; Do not have relative motion between pull bar (9) and the piston (18), both fix with piston (18) and sleeve (16) through the baffle ring (15b) on the piston (18); Hydraulic oil enters into two groups of oil pockets (14) drive pistons (18) through pipe joint (11) and in oil cylinder (7), does axially small reciprocatingly sliding; Drive pull bar (9) and make ram (4) produce a pulling force backward, through adjustment pull bar (9) pulling force compensate ram because of gravity cause deflection deformation.
2. the ram deflection compensation mechanism of heavy type numerical control console mode milling-boring machine according to claim 1; The structure that it is characterized in that duplex pull rod and oil cylinder: two pull bars (9) are installed at two jiaos of places of inner and upper of square ram (4) in the cross section; Pull bar (9) front end is fixing through rod nut (10) and ram (4); Two pull bars (9) rear end is installed hydraulic jack (7) respectively; Radially fixing between two jiaos behind hydraulic jack (7) and the ram (4) according to matched in clearance; Again by pull bar (9) with ram (4), pull bar (9), oil cylinder (7) string group after, utilize hydraulic jack (7) rear end sleeve nut (8) that angle on pull bar (9) rear end and ram (4) rear end two is fixed as one; Gland (20) and screw (21) connected the back and form airtight oil cylinder before cylinder body (19) two ends reached through rear pressing cover (12).
3. the ram deflection compensation mechanism of heavy type numerical control console mode milling-boring machine according to claim 1; It is characterized in that the oil cylinder internal structure: oil cylinder (7) is a pressurizing cylinder: the axial direction of promptly locating at cylinder body (19) inner carrier (18) has added two groups of oil pockets (14); Pressure is multiplied, to guarantee the required pressure of ram deflection compensation mechanism; Carry out many places oil pressure sealing, little matched in clearance by high resiliency oil sealing (13) between piston (18) and the oil cylinder (7).
4. the ram deflection compensation mechanism of heavy type numerical control console mode milling-boring machine according to claim 1; It is characterized in that baffle ring (15b) is two semicircle steel discs; Internal diameter is identical for the baffle ring draw-in groove (15a) of its internal diameter and sleeve (16) outer wall, its radial height is greater than sleeve (16) external diameter upper baffle ring draw-in groove (15a) degree of depth; Embed between sleeve (16) and the piston (18) in pairs, it is static relatively to guarantee both.
5. the ram deflection compensation mechanism of heavy type numerical control console mode milling-boring machine according to claim 1, it is characterized in that on hydraulic circuit, installing the size that an electro-hydraulic proportional valve is controlled oil cylinder working-pressure additional: oil pressure is output as 0-100bar, and maximum provides pulling force 30kN; Along with stretching out of ram, electro-hydraulic proportional valve control oil pressure increases gradually, and on the contrary, controlled pressure reduces during the ram retraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120520797XU CN202517333U (en) | 2011-12-14 | 2011-12-14 | Ram deflection compensation mechanism for heavy numerical-control floor-type milling-boring machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120520797XU CN202517333U (en) | 2011-12-14 | 2011-12-14 | Ram deflection compensation mechanism for heavy numerical-control floor-type milling-boring machine |
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| CN202517333U true CN202517333U (en) | 2012-11-07 |
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| CN201120520797XU Expired - Lifetime CN202517333U (en) | 2011-12-14 | 2011-12-14 | Ram deflection compensation mechanism for heavy numerical-control floor-type milling-boring machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528566A (en) * | 2011-12-14 | 2012-07-04 | 中捷机床有限公司 | Ram flexibility compensation mechanism of heavy numerical control floor type milling and boring machine |
| CN104325362A (en) * | 2013-10-30 | 2015-02-04 | 柳州正菱重型数控机床有限公司 | Ram self-weight deformation compensation device |
| CN110524249A (en) * | 2019-07-08 | 2019-12-03 | 荆州市恒丰制动系统有限公司 | A kind of vehicle boring is integrally machined device |
-
2011
- 2011-12-14 CN CN201120520797XU patent/CN202517333U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528566A (en) * | 2011-12-14 | 2012-07-04 | 中捷机床有限公司 | Ram flexibility compensation mechanism of heavy numerical control floor type milling and boring machine |
| CN104325362A (en) * | 2013-10-30 | 2015-02-04 | 柳州正菱重型数控机床有限公司 | Ram self-weight deformation compensation device |
| CN110524249A (en) * | 2019-07-08 | 2019-12-03 | 荆州市恒丰制动系统有限公司 | A kind of vehicle boring is integrally machined device |
| CN110524249B (en) * | 2019-07-08 | 2021-04-27 | 荆州市恒丰制动系统有限公司 | Turning and boring integrated machining device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211014 Address after: No.17a1, Kaifa Road, Shenyang Economic and Technological Development Zone, Shenyang City, Liaoning Province Patentee after: SHENYANG MACHINE TOOL (Group) Co.,Ltd. Address before: 110141, No. 17, No. 1, development road, Shenyang economic and Technological Development Zone, Shenyang, Liaoning Patentee before: CHINA-CZECHOSLOVAKIA MACHINE TOOL Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |