CN201136105Y - Exactly positioning apparatus for feed of ram - Google Patents
Exactly positioning apparatus for feed of ram Download PDFInfo
- Publication number
- CN201136105Y CN201136105Y CNU200820000156XU CN200820000156U CN201136105Y CN 201136105 Y CN201136105 Y CN 201136105Y CN U200820000156X U CNU200820000156X U CN U200820000156XU CN 200820000156 U CN200820000156 U CN 200820000156U CN 201136105 Y CN201136105 Y CN 201136105Y
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- China
- Prior art keywords
- ram
- baseline rod
- accurate positioning
- fixed
- positioning device
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Abstract
The utility model relates to a ram feeding accurate positioning device, which mainly solves the problem that the ram of a numerical control machine is elongated to generate machining deviation with the temperature rising. The ram feeding accurate positioning device is characterized in that a baseline rod (4) and a displacement sensor (5) are fixed on a ram (1), the baseline rod (4) is a rod with fixed material and regular form, one end of the baseline rod (4) is fixed on the ram (1), and the other end freely extends and the end face of the other end contacts the displacement sensor (5). The ram feeding accurate positioning device feeds back the information of the baseline rod elongating with the hot ram through the displacement sensor to compensate the elongated amount of the ram to ensure the coincidence of the theoretical positioning value and the practical positioning value. The ram feeding accurate positioning device has the characteristics of easy control and accurate positioning.
Description
Technical field:
The utility model relates to a kind of parts on the Digit Control Machine Tool, especially ram feeding accurate positioning device in the field of machining.
Background technology
For Digit Control Machine Tool, its machining accuracy is to weigh a key factor of Digit Control Machine Tool manufacture level, and wherein ram is influenced by temperature factor in the course of the work, length can change, theoretical produce deviation with the actual location value, for example, heavy type numerical control lands the ram inside of Xi Boring bed Xi Boring axle is housed, can realize the ram feeding by servomotor, because the heat that produces that runs up of Xi Boring axle can pass to ram, make ram produce line and expand, will influence the flatness of workpiece to be machined.Effective solution is not also taked in the compensation of extending with the temperature rising for ram at present, generally is to reduce the ram temperature by the method that increases coolant jacket, and the coolant jacket device is difficult to control to the stroke of ram, can not thoroughly solve offset issue.
The utility model content:
For raising with temperature, the ram that solves Digit Control Machine Tool extends the problem that produces machining deviation; the utility model provides a kind of ram feeding accurate positioning device; this ram feeding accurate positioning device is subjected to the information of thermal stretching with ram by displacement transducer feedback reference bar; compensate the elongation of ram; guarantee theoretical consistent with the actual location value of ram, have and be easy to control and locate accurate characteristics.
The technical solution of the utility model is: this ram feeding accurate positioning device comprises ram, ram links to each other with servomotor by leading screw, be fixed with baseline rod and displacement transducer on the ram, baseline rod is that material is fixed and the rod member of regular shape, one end of baseline rod is fixed on the ram, and the other end freely stretches and its end face contacts with displacement transducer.
Be fixed with bearing on the above-mentioned ram, the free extended end of described baseline rod is passed bearing.
The utlity model has following beneficial effect: owing to take such scheme, be subjected to the information of thermal stretching by displacement transducer feedback reference bar with ram, compensate the elongation of ram, guarantee theoretical consistent with the actual location value of ram, be easy to control, the location is accurate.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
1-ram among the figure, 2-leading screw, 3-servomotor, 4-baseline rod, 5-displacement transducer, 6-bearing.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, this ram feeding accurate positioning device comprises ram 1, ram 1 links to each other with servomotor 3 by leading screw 2, be fixed with baseline rod 4 and displacement transducer 5 on the ram 1, baseline rod 4 is fixed for material and the rod member of regular shape, one end of baseline rod 4 is fixed on the ram 1, and the other end freely stretches and its end face contacts with displacement transducer 5.Be fixed with bearing 6 on the ram 1, the free extended end of described baseline rod 4 is passed bearing 6, guarantees baseline rod 4 horizontal stretchings.Displacement transducer 5 is installed at normal temperatures, contact with the free end end of baseline rod 4, when temperature raises, baseline rod 4 length change, and displacement transducer 5 detects this variable quantity, and send the variable quantity data to digital control system, digital control system deducts this numerical value the elongation that is heated of baseline rod 4 self, its difference just is the elongation that is heated of ram 1, and last digital control system control servomotor 3 drives leading screw 2 and drives ram 1 counter motion, thereby 1 elongation produces compensation to ram.
The elongation under different temperatures of baseline rod 4 can record by the thermal coefficient of expansion formula.
ΔL＝L?×α×ΔT
The length variations that Δ L-thermal expansion produces
L-baseline rod raw footage
α-baseline rod material coefficient of thermal expansion coefficient
Δ T-baseline rod variation of temperature
Wherein thermal coefficient of expansion can record by test.Generally, the scope of variation of temperature at work of ram 1 is 20～60 ℃, measures the elongation Δ L of baseline rod 4 under the plurality of temperature in this temperature range, and then calculates thermal coefficient of expansion.The elongation of baseline rod 4 varies with temperature and is linear change, can be used as constant input machine tool numerical control system.
The value that displacement transducer 5 records is baseline rod 4 self elongation and ram 1 an elongation sum, displacement transducer 5 feeds back to digital control system with measured value, digital control system is handled the elongation that obtains ram 1 by data, and then controls the length change compensation that servomotor 3 carries out ram.
Claims (2)
1, a kind of ram feeding accurate positioning device, comprise ram (1), ram (1) links to each other with servomotor (3) by leading screw (2), it is characterized in that: be fixed with baseline rod (4) and displacement transducer (5) on the ram (1), baseline rod (4) is fixed for material and the rod member of regular shape, one end of baseline rod (4) is fixed on the ram (1), and the other end freely stretches and its end face contacts with displacement transducer (5).
2, ram feeding accurate positioning device according to claim 1 is characterized in that: be fixed with bearing (6) on the ram (1), the free extended end of described baseline rod (4) is passed bearing (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820000156XU CN201136105Y (en) | 2008-01-04 | 2008-01-04 | Exactly positioning apparatus for feed of ram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820000156XU CN201136105Y (en) | 2008-01-04 | 2008-01-04 | Exactly positioning apparatus for feed of ram |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201136105Y true CN201136105Y (en) | 2008-10-22 |
Family
ID=40036793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820000156XU Expired - Fee Related CN201136105Y (en) | 2008-01-04 | 2008-01-04 | Exactly positioning apparatus for feed of ram |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201136105Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158031A (en) * | 2013-03-28 | 2013-06-19 | 无锡华联精工机械有限公司 | Induction ring tracking device of rotary lathe |
| CN103495905A (en) * | 2013-09-04 | 2014-01-08 | 沈机集团昆明机床股份有限公司 | Real-time online detection and closed loop feedback compensation device of ram thermal expansion deformation errors of numerically-controlled machine tool and detection method thereof |
| CN103624631A (en) * | 2013-12-18 | 2014-03-12 | 中捷机床有限公司 | Device for measuring thermal elongation of ram based on texture thermal elongation difference property |
| CN107009189A (en) * | 2017-04-26 | 2017-08-04 | 广西大学 | A kind of thermal stretching compensation mechanism applied to milling-boring machine ram |
-
2008
- 2008-01-04 CN CNU200820000156XU patent/CN201136105Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103158031A (en) * | 2013-03-28 | 2013-06-19 | 无锡华联精工机械有限公司 | Induction ring tracking device of rotary lathe |
| CN103158031B (en) * | 2013-03-28 | 2015-04-15 | 无锡华联精工机械有限公司 | Induction ring tracking device of rotary lathe |
| CN103495905A (en) * | 2013-09-04 | 2014-01-08 | 沈机集团昆明机床股份有限公司 | Real-time online detection and closed loop feedback compensation device of ram thermal expansion deformation errors of numerically-controlled machine tool and detection method thereof |
| CN103495905B (en) * | 2013-09-04 | 2016-06-29 | 沈机集团昆明机床股份有限公司 | The detection of numerical control machine tool ram thermal stretching distortion inaccuracy real-time online and closed loop feedback compensation device and detection method |
| CN103624631A (en) * | 2013-12-18 | 2014-03-12 | 中捷机床有限公司 | Device for measuring thermal elongation of ram based on texture thermal elongation difference property |
| CN103624631B (en) * | 2013-12-18 | 2015-09-23 | 中捷机床有限公司 | The device of ram thermal stretching is measured based on material thermal stretching difference characteristic |
| CN107009189A (en) * | 2017-04-26 | 2017-08-04 | 广西大学 | A kind of thermal stretching compensation mechanism applied to milling-boring machine ram |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20170104 |