CN202041309U - Measuring device for dynamic thermal error of press machine - Google Patents
Measuring device for dynamic thermal error of press machine Download PDFInfo
- Publication number
- CN202041309U CN202041309U CN2010206658144U CN201020665814U CN202041309U CN 202041309 U CN202041309 U CN 202041309U CN 2010206658144 U CN2010206658144 U CN 2010206658144U CN 201020665814 U CN201020665814 U CN 201020665814U CN 202041309 U CN202041309 U CN 202041309U
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- pressing machine
- machine
- slide block
- eddy current
- measuring means
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Abstract
The utility model provides a measuring device for dynamic thermal error of a press machine, wherein the measuring device is simple in structure and convenient in use. The measuring device comprises at least one thermocouple and a non-contact displacement sensor, wherein the thermocouple(s) is/are arranged on the press machine and is/are used for measuring the temperature of a machine tool, and the non-contact displacement sensor is arranged on the press machine and is used for measuring the displacement when a sliding block of the press machine moves to a bottom dead center.
Description
Technical field
The utility model relates to the dynamic hot error measuring means of a kind of pressing machine, especially a kind of measurement of the hot error that causes based on the lathe temperature variation.
Background technology
Pressing machine belongs to " few do not have cutting class " efficient operation machine tool, can produce more near the metal parts of net shape, more meets clean production and green requirement of producing, and is widely used in during machine-building produces.Along with developing rapidly of precision processing technology and improving constantly of part processing precision, the precision of pressing machine is also had higher requirement.In the pressing machine course of work, the hot error that is caused by temperature variation is very big to the machining precision influence of lathe, and big quantity research document shows: hot error account for lathe total error 40%～70%.Therefore, the pressing machine duty is comprised that the speed of mainshaft, operational forces, lathe temperature and pressure machine operating error test, the hot error model of build-up pressure machine is very important, so that in time find and deal with problems, improves part processing precision.
But also there is not the simple and effective device that the dynamic hot error of pressing machine is measured now.
The utility model content
The utility model provides a kind of pressing machine simple in structure, easy to use dynamic hot error measuring means.
The dynamic hot error measuring means of this pressing machine is included at least one of installing on the pressing machine and is used for the thermopair of measuring machine bed tempertaure, and that installs on pressing machine is used for the non-contact displacement transducer that gaging pressure machine slide block moves to the displacement of bottom dead centre.
The beneficial effect of this device: this device is by existing simple mechanisms such as thermopair and non-contact displacement transducers, with thermocouple measurement lathe temperature, displacement when moving to bottom dead centre with non-contact displacement transducer gaging pressure machine slide block, the temperature variation of calculating pressure machine and hot error thereof have realized the measurement to the dynamic hot error of pressing machine.This apparatus structure is simple, easy to use.
The dynamic hot error measuring means of above-mentioned pressing machine, non-contact displacement transducer is the eddy current sensor that is installed on the eddy current support, the eddy current support is fixed on the press frame; The vortex induction frame is installed on the slide block.Preferably the vortex induction frame is installed on the top mold frame, and top mold frame is installed on the slide block by die shank.
The dynamic hot error measuring means of above-mentioned pressing machine, thermopair are installed near the motor, main shaft fuselage, connecting rod or the slide block.
The utility model is as follows to the concrete steps of the dynamic method for measuring thermal error of pressing machine:
A, i thermopair, i 〉=1 are installed on pressing machine; On pressing machine, install and be used for the non-contact displacement transducer that gaging pressure machine slide block moves to the displacement of bottom dead centre;
B, operating pressure machine are gathered the lathe temperature T that t in time that i thermopair record changes
I, tDisplacement L when the slide block that the t in time that the collection non-contact displacement transducer records changes moves to bottom dead centre
t
C, the lathe initial temperature T during with t=0
I, 0Initial displacement L when moving to bottom dead centre with slide block
0Be benchmark, when calculating at a time t, the lathe temperature change value at i thermopair place is Δ T
I, t=T
I, t-T
I, 0The machine tool thermal error that causes with the temperature variation of lathe is Δ L
t=L
t-L
0
D, according to lathe temperature change value Δ T
I, tWith machine tool thermal error Δ L
t, the hot error model Δ L that build-up pressure machine temperature variation causes
t=f (Δ T
I, t, t).
The beneficial effect of this method: the method that the utility model proposes the operating error that a kind of gaging pressure machine Yin Wendu causes, when pressing machine is worked, by thermocouple measurement lathe temperature, displacement when non-contact displacement transducer gaging pressure machine slide block moves to bottom dead centre, the temperature variation of calculating pressure machine and hot error thereof, this method is simple to operate, measures accurately, can be applied to the accuracy detection and the raising of pressing machine.
The dynamic method for measuring thermal error of above-mentioned pressing machine, non-contact displacement transducer are the eddy current sensor that is installed on the eddy current support, and the eddy current support is with being fixed on the press frame; The vortex induction frame is installed on the slide block.
The dynamic method for measuring thermal error of above-mentioned pressing machine is selected apart from motor, main shaft vicinity thermopair to be installed on fuselage, connecting rod, slide block.
Description of drawings
Fig. 1 is the pressing machine synoptic diagram that the dynamic hot error measuring means of pressing machine is installed.
Fig. 2 is the vortex induction frame among Fig. 1, eddy current sensor, eddy current support, the synoptic diagram of parts such as following mould bases.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Referring to Fig. 1,2, the dynamic hot error measuring means of pressing machine is included in i the thermopair (not shown) of installing on the pressing machine that is used for the measuring machine bed tempertaure, i 〉=1.For the work transformation temperature of gaging pressure machine, be preferably in the measurement point of selecting on fuselage 9, connecting rod 10, the slide block 11 apart from thermal source such as motor 12, kinematic pair vicinity thermopair is installed.
Pressing machine is in when work, its temperature variation mainly by internal heat resource as decision.Motor is because the loss heating; Main shaft is connected generation relative motion with connecting rod by bearing with fuselage, main shaft, produces frictional heating; Connecting rod is connected the generation relative motion with slide block by ball pivot, produces frictional heating; Slide block is connected the generation relative motion with fuselage by guide rail, produces frictional heating; Therefore, thermopair is installed in place nearer apart from thermal source on these parts, so that collect the temperature that is closely related with operating mode.
Eddy current sensor 6 is installed on the eddy current support 7, and eddy current support 7 is fixed on the fuselage with following mould bases 8; Vortex induction frame 5 is installed on the top mold frame 3, and top mold frame 3 is installed on the slide block 11 by die shank 4.Bed die 1 is arranged on down on the mould bases, and mold 2 is arranged on the top mold frame.When pressing machine is worked, eddy current sensor maintains static, and the vortex induction frame is along with slide block movement, near slide block moves to bottom dead centre, enter in the measurement range of eddy current sensor, then eddy current sensor can measure the displacement L that press ram moves to bottom dead centre
t
The pressing machine method for measuring thermal error may further comprise the steps:
The operating pressure machine is gathered the lathe temperature T that t in time that i thermopair record changes
I, tDisplacement L when the slide block that the t in time that the collection eddy current sensor records changes moves to bottom dead centre
t
I the sensor that collects a certain measurement point of lathe be the temperature value T of t at a time
I, t, the record initial temperature value is T
I, 0, then at a time during t, the temperature change value of i measurement point is Δ T on the lathe
I, t=T
I, t-T
I, 0
The displacement L of the lathe that collects when at a time the slide block of t moves to bottom dead centre
t, record initial displacement value is L
0, then at a time during t, the machine tool thermal error that the temperature variation of lathe causes is Δ L
t=L
t-L
0
According to the temperature variation Δ T that calculates lathe
I, tWith machine tool thermal error Δ L
t, the hot error model Δ L that build-up pressure machine temperature variation causes
t=f (Δ T
I, t, t).
In brief, the dynamic method for measuring thermal error of pressing machine of the present utility model, concrete steps are as follows: 1. the thermopair collecting temperature is installed in the pressing machine appropriate location, 2. equipped with non-contact displacement transducer, gaging pressure machine slide block moves to the displacement of bottom dead centre, 3. calculates the machine tool thermal error of determining that the pressing machine temperature variation causes.Can solve the problems of measurement of lathe temperature variation and hot error in the pressing machine course of work and the hot error calculating of the pressing machine that draws by the utility model.
Claims (4)
1. dynamic hot error measuring means of pressing machine, it is characterized in that, it is included at least one of installing on the pressing machine and is used for the thermopair of measuring machine bed tempertaure, and that installs on pressing machine is used for the non-contact displacement transducer that gaging pressure machine slide block moves to the displacement of bottom dead centre.
2. the dynamic hot error measuring means of pressing machine as claimed in claim 1 is characterized in that non-contact displacement transducer is the eddy current sensor that is installed on the eddy current support, and the eddy current support is fixed on the press frame; The vortex induction frame is installed on the slide block.
3. the dynamic hot error measuring means of pressing machine as claimed in claim 2 is characterized in that the vortex induction frame is installed on the top mold frame, and top mold frame is installed on the slide block by die shank.
4. the dynamic hot error measuring means of pressing machine as claimed in claim 1 is characterized in that, thermopair is installed near the motor, main shaft fuselage, connecting rod or the slide block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206658144U CN202041309U (en) | 2010-12-17 | 2010-12-17 | Measuring device for dynamic thermal error of press machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206658144U CN202041309U (en) | 2010-12-17 | 2010-12-17 | Measuring device for dynamic thermal error of press machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202041309U true CN202041309U (en) | 2011-11-16 |
Family
ID=44968747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206658144U Expired - Fee Related CN202041309U (en) | 2010-12-17 | 2010-12-17 | Measuring device for dynamic thermal error of press machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202041309U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183311A (en) * | 2010-12-17 | 2011-09-14 | 东南大学 | Press dynamic thermal error measuring device and method |
| CN103791806A (en) * | 2014-02-25 | 2014-05-14 | 福建宁德核电有限公司 | Rapid adjustment and installation mechanism for eddy current displacement sensor |
| CN111059993A (en) * | 2018-10-16 | 2020-04-24 | 纳博特斯克有限公司 | Displacement sensor |
-
2010
- 2010-12-17 CN CN2010206658144U patent/CN202041309U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183311A (en) * | 2010-12-17 | 2011-09-14 | 东南大学 | Press dynamic thermal error measuring device and method |
| CN103791806A (en) * | 2014-02-25 | 2014-05-14 | 福建宁德核电有限公司 | Rapid adjustment and installation mechanism for eddy current displacement sensor |
| CN111059993A (en) * | 2018-10-16 | 2020-04-24 | 纳博特斯克有限公司 | Displacement sensor |
| CN111059993B (en) * | 2018-10-16 | 2021-12-21 | 纳博特斯克有限公司 | Displacement sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20121217 |