CN104325360A - Comparing detector and comparing detector-based section original point difference measurement method - Google Patents
Comparing detector and comparing detector-based section original point difference measurement method Download PDFInfo
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- CN104325360A CN104325360A CN201410567653.8A CN201410567653A CN104325360A CN 104325360 A CN104325360 A CN 104325360A CN 201410567653 A CN201410567653 A CN 201410567653A CN 104325360 A CN104325360 A CN 104325360A
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- workpiece
- guide shaft
- detection device
- comparison detection
- section bar
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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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
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- Mechanical Engineering (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a comparing detector, which comprises a support, a support plate, leading axles, an axle bumper, springs, a positioning stop piece, a leading axle displacement measurement device and a servo motor; the side face of the support is fixedly arranged on the support plate; perforations are formed in the support plate; each leading axle passes through the corresponding perforation and axially slides in the perforation; the axle bumper is fixedly arranged on the leading axle; each spring sheathes the corresponding leading axle on the outer side face of the support plate; the positioning stop piece is fixed by the top ends of the leading axles on the outer side face of the support plate; the leading axle displacement measurement device is fixedly arranged at the upper end of the support and is opposite to the leading axles in position. The comparing detector disclosed by the invention is convenient to install; quick search of the actual original point of a workpiece can be rapidly realized without a huge change on the existing processing center; the invention also discloses a comparing detector-based section original point difference measurement method; the service life of equipment is prolonged and the finished product ratio of the workpiece is increased by the method; the layout precision of a manipulator does not need to be increased; the application range is wide, the late maintenance and debugging cost is low, and the service life is long.
Description
Technical field
The present invention relates to the field of deep of industrial aluminum profile or PVC profile, door and window curtain wall manufacture field, being specifically related to a kind of comparator probe for judging Workpiece zero point position and the section bar initial point difference measurement method based on this comparator probe.
Background technology
In the machining center or CNC equipment of aluminium alloy or PVC profile, after Workpiece fixing clamping, need initial point (benchmark) position determining workpiece, then the motion of head is as initial position, go to find the hole slot position that will process, this process is called looks for initial point (benchmark), for convenience of description, hereafter " workpiece " is described with " section bar " without exception, " initial point (benchmark) " abbreviation " initial point ".
In door and window curtain wall, solar energy and other industrial aluminum profile deep processing industry, current machining center or CNC drilling and milling machine look for the method for initial point to mainly contain two kinds of methods:
(1) one end locate mode: be applicable to manual unit operation, the positioning plate device position of one end is fixed, and section bar one end is close to location-plate, and location-plate position is section bar initial point.
(2) centralized positioning mode: be applicable to pipelining, section bar is placed with theoretical centerline symmetry all the time, greatly can simplify the structure of feed system, reduces position error; Conveniently location-plate location, the device of running fix plate has changed servo-drive into, when section bar has length, positioning plate device servo moves to the theoretical tip position of section bar, then section bar one end is close to location-plate, location-plate position is namely as the initial point of section bar, because section bar is placed with the theoretical centerline of streamline symmetry all the time, so theoretical centerline also can be used as the initial point of section bar.
Above-mentioned two kinds of locate modes must adopt artificial loading, cannot by finger feed, because positioning plate device reserves position in advance, feeding mechanical hand adds the error in length of upper sectional material due to the error that walks, section bar certainly will be had and location-plate touches firmly or the situation of firmly squeezing occurs, easily cause the inaccurate or section bar in location to squeeze and hinder; In order to solve the problem, have in scheme and propose to cancel location-plate, be directly in place by manipulator, so just manipulator is walked the very high requirement of precision proposition, and workpiece and manipulator can not have relative displacement in feeding process, these substantially increase design difficulty and manufacturing cost.
Summary of the invention
Goal of the invention: object of the present invention provide a kind of can the comparator probe of Workpiece zero point of fast finding finger feed and the difference measurement method of the section bar initial point based on this comparator probe fast searching.
Technical scheme: the invention discloses a kind of comparator probe, comprises support, gripper shoe, guide shaft, axle bumper, spring, position block, guide shaft displacement measuring device and servomotor; Described side face fixes described gripper shoe; Gripper shoe is provided with perforation, and described guide shaft slides axially through perforation; Described axle bumper is fixed on guide shaft, prevents guide shaft from skidding off from gripper shoe; Described spring housing is on the guide shaft of gripper shoe lateral surface; Described position block is fixed on the top of gripper shoe lateral surface guide shaft; It is relative with guide shaft position that described guide shaft displacement measuring device is fixed on pedestal upper end; Described servomotor is connected with support, drives support displacement.Comparator probe is adopted to be used for detecting the actual origin position of workpiece in the present invention, solve the problem that workpiece blowing must adopt artificial location, by increasing comparator probe, can fast searching to the actual initial point of workpiece, without the need to improving finger feed precision, reduce the design difficulty of manipulator, reduce debugging and the maintenance cost in later stage.
Described guide shaft displacement measuring device in comparator probe of the present invention comprises magnetic grid and displacement transducer; Described magnetic grid is axially fixed in the side of guide shaft along guide shaft, and institute's displacement sensors is fixed on support; Magnetic grid is relative with displacement transducer, and displacement transducer catches the displacement of magnetic grid.Pass through ingenious for the magnetic grid side being arranged on guide shaft in the present invention, by the shift length of displacement transducer perception guide shaft, thus draw the actual initial point of workpiece and the error amount of original theoretical point, find the actual origin position of workpiece, quick and precisely, and structure is simple.
Also disclose a kind of section bar initial point difference measurement method based on above-mentioned comparator probe in the present invention, in section bar initial point difference measurement method, have employed section bar initial point difference measuring system; Described section bar initial point difference measuring system comprises: fixture, comparator probe, workpiece and workbench lathe bed; Described fixture is arranged on the guide rail of workbench lathe bed side, according to requirements can fix, and also craft or driven by servomotor can adjust its position and lock; Described comparator probe is arranged on the guide rail of workbench lathe bed upper side; Described piece-holder is on fixture.
Section bar initial point difference measurement method concrete steps of the present invention are as follows:
(1) theoretical position is had when first supposing that workpiece is brought by feed mechanism, namely workpiece has an original theoretical point position, and presets comparison detection device is greater than location of workpiece actual deviation value from the numerical value of this L1 of the amount of breaking through L1(that continues after initial position goes to this original theoretical point to pass by);
(2) workpiece to be processed is delivered to clamp;
(3) start comparison detection device, drive comparison detection device to walk from initial position to workpiece direction original theoretical point position continue the amount of the breaking through L1 that passes by by servomotor;
(4), when the actual initial point of workpiece overlaps with original theoretical point position, when comparison detection device goes to original theoretical point position, the position block of comparison detection device upper end just touches workpiece; Now when servomotor drives comparison detection device to continue to walk the amount of a breaking through L1, the guide shaft in comparison detection device can shrink back under the effect of workpiece pressure, learns by guide shaft displacement measuring device the distance L2 that guide shaft is drawn back; Now L1=L2, i.e. difference L=L1-L2=0;
In like manner, when the right side of the actual initial point of workpiece at original theoretical point, because position block touches workpiece after the meeting, so the backway L2<L1 of guide shaft, so just have L=L1-L2>0;
In like manner, when the left side of the actual initial point of workpiece at original theoretical point, because position block first can touch workpiece, so the backway L2>L1 of guide shaft, so just have L=L1-L2<0;
By calculating the difference L of L1 and L2, the position of the actual initial point of section bar just can be judged according to this difference:
L=L1-L2>0, actual origin position is more to the right than original theoretical point position;
L=L1-L2=0, actual origin position is than original theoretical point position consistency;
L=L1-L2<0, actual origin position is more to the left than original theoretical point position;
(5) after completing judgement, comparison detection device returns to initial position by driven by servomotor;
(6) head of machining center namely with the actual origin position of the section bar of said determination for benchmark is processed workpiece.
L1 is measured in advance by setting in the present invention, avoid workpiece and directly deliver to comparison detection device initial position, effectively can avoid the shock of workpiece and comparison detection device, effectively protect workpiece and comparison detection device, extend the service life of equipment and the yield rate of workpiece; Adopt the method for the invention can calculate the position of the actual initial point of workpiece fast and accurately, without the need to increasing the precision that manipulator is put, be applicable to various dissimilar section bar, without the need to the transmission precision of the workpiece design manipulator according to different types, applied widely, later period maintenance debugging cost is low, long service life.
Beneficial effect:
Compared with prior art, the present invention has the following advantages:
1, comparator probe of the present invention arranges conveniently, without the need to making huge change to existing machining center, only need add at existing machining center the fast searching that comparator probe can realize the actual initial point of workpiece fast;
2, the section bar initial point difference measurement method that the present invention introduces avoids workpiece and directly delivers to comparison detection device initial position, effectively can avoid the shock of workpiece and comparison detection device, protect workpiece and comparison detection device, extend the service life of equipment and the yield rate of workpiece; Adopt the method for the invention can calculate the position of the actual initial point of workpiece fast and accurately, without the need to increasing the precision that manipulator is put, be applicable to various dissimilar section bar, applied widely, later period maintenance debugging cost is low, long service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of section bar initial point difference measuring system of the present invention;
Fig. 2 is the structural representation of comparator probe in the present invention;
Fig. 3 is the situation that in the present invention, original theoretical point and actual initial point overlap;
Fig. 4 is that in the present invention, actual initial point overlaps situation to the right;
Fig. 5 is that in the present invention, actual initial point overlaps situation to the left;
Wherein in figure, sequence number is as follows: fixture 1, comparator probe 2, workpiece 3, support 21, gripper shoe 22, guide shaft 23, spring 24, position block 25, magnetic grid 26 and displacement transducer 27 servomotor 28, axle bumper 29.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further.
Embodiment
Section bar initial point difference measuring system as described in Figure 1 comprises: fixture 1, comparator probe 2, workpiece 3 and workbench lathe bed; Described fixture 1 is arranged on the guide rail of workbench lathe bed side, adjusts to relevant position as required and locks; Described comparator probe 2 is arranged on the guide rail of workbench lathe bed upper side; Described workpiece 3 is clamped on fixture 1.
In the present embodiment, comparator probe (as shown in Figure 3) comprising: support 21, gripper shoe 22, guide shaft 23, spring 24, position block 25, guide shaft displacement measuring device, servomotor 28 and axle bumper 29; Described guide shaft displacement measuring device comprises magnetic grid 26 and displacement transducer 27; Described gripper shoe 22 is fixed in described support 21 side; Gripper shoe 22 is provided with perforation, and described guide shaft 23 can slide axially through perforation; Described axle bumper is fixed on guide shaft, blocks guide shaft, fits at the effect lower leading axle of spring tension and the medial surface of gripper shoe 22, and guide shaft is not skidded off under the tension force of spring from gripper shoe perforation; Described spring 24 is enclosed within the guide shaft of gripper shoe 22 lateral surface; Described position block 25 is fixed on the top of gripper shoe 22 lateral surface guide shaft; Described servomotor 28 is connected with support 21, drives support 21 displacement; Described magnetic grid 26 is axially fixed in the side of guide shaft along guide shaft, institute's displacement sensors 27 is fixing on the stent 21; Magnetic grid 26 is relative with displacement transducer 27, and displacement transducer 27 catches the displacement of magnetic grid 26.
In the present embodiment, the operation principle of comparator probe is as follows: described servomotor 28 drives support 21 to move, support 21 drives the position block 25 in gripper shoe 22 to travel forward, when position block 25 touches workpiece, servomotor 28 continues to move to workpiece direction, position block 25 props up workpiece, under the pressure of workpiece, guide shaft is drawn back, because magnetic grid 26 is positioned at the side of guide shaft, while guide shaft retreats, magnetic grid is also in retrogressing, displacement transducer 27 catches the displacement of magnetic grid 26 until drive motors 28 covers stroke L1, the retrogressing length L2 of guide shaft determined by displacement transducer 27, after comparator probe completes judgement, drive motors drives comparator probe to return to initial position, and position block 25 and guide shaft 23 are returned to initial position by spring 24.
Section bar initial point difference measurement method concrete steps described in the present embodiment are as follows:
(1) first suppose that feed mechanism has a theoretical position when being brought by workpiece, namely workpiece has an original theoretical point position, and presets comparison detection device continue the amount of the breaking through L1 that passes by after initial position goes to this original theoretical point;
(2) workpiece to be processed is delivered to clamp;
(3) start comparison detection device, drive comparison detection device to walk from initial position to workpiece direction original theoretical point position continue the amount of the breaking through L1 that passes by by servomotor;
(4), when the actual initial point of workpiece overlaps with original theoretical point position, when comparison detection device goes to original theoretical point position, the position block of comparison detection device upper end just touches workpiece; Now when servomotor drives comparison detection device to continue to walk the amount of a breaking through L1, the guide shaft in comparison detection device can shrink back under the effect of workpiece pressure, learns by guide shaft displacement measuring device the distance L2 that guide shaft is drawn back; Now L1=L2, i.e. difference L=L1-L2=0;
In like manner, when the right side of the actual initial point of workpiece at original theoretical point, because position block touches workpiece after the meeting, so the backway L2<L1 of guide shaft, so just have L=L1-L2>0;
In like manner, when the left side of the actual initial point of workpiece at original theoretical point, because position block first can touch workpiece, so the backway L2>L1 of guide shaft, so just have L=L1-L2<0;
By calculating the difference L of L1 and L2, the position of the actual initial point of section bar just can be judged according to this difference:
L=L1-L2>0, actual origin position is more to the right than original theoretical point position;
L=L1-L2=0, actual origin position is than original theoretical point position consistency;
L=L1-L2<0, actual origin position is more to the left than original theoretical point position;
(5) after completing judgement, comparison detection device returns to initial position by driven by servomotor;
(6) head of machining center namely with the actual origin position of the section bar of said determination for benchmark is processed workpiece.
Such as:
1, as shown in Figure 3, the amount of the going out L1 setting workpiece is 20mm; And comparison detection device is walked to workpiece direction from initial position, arrive the origin position preset, on the origin position preset, comparison detection device has encountered the front end of workpiece, then, comparison detection device continues to pass by workpiece direction L1, the L2=20mm now recorded; L=L1-L2=0; Then actual origin position overlaps than original theoretical point;
2, as shown in Figure 4, the amount of the going out L1 setting workpiece is 20mm; And comparison detection device is walked to workpiece direction from initial position, arrive the origin position preset, before arriving the initial point preset, comparison detection device does not encounter workpiece, and comparison detection device continues to pass by workpiece direction L1 from the origin position preset, now, L2=15mm is recorded; L=L1-L2=5mm>0; Then actual origin position 5mm more to the right than original theoretical point position;
3, as shown in Figure 5, the amount of the going out L1 setting workpiece is 20mm; And comparison detection device is walked to workpiece direction from initial position, before not arriving default origin position, meet in comparison detection device and workpiece front end, and arrive the origin position preset at comparison detection device after, continue to pass by workpiece direction L1, record L2=25mm; L=L1-L2=-5mm<0; Then actual origin position 5mm more to the left than original theoretical point position.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (4)
1. a comparator probe, is characterized in that: comprise support (21), gripper shoe (22), guide shaft (23), spring (24), position block (25), guide shaft displacement measuring device and servomotor (28); Described gripper shoe (22) is fixed in described support (21) side; Gripper shoe (22) is provided with perforation, and described guide shaft (23) slides axially through perforation; Described axle bumper (29) is fixed on guide shaft (23); Described spring (24) is enclosed within the guide shaft of gripper shoe (22) lateral surface; Described position block (25) is fixed on the top of gripper shoe (22) lateral surface guide shaft; It is relative with guide shaft position that described guide shaft displacement measuring device is fixed on support (21) upper end; Described servomotor (28) is connected with support (21), drives support (21) displacement.
2. comparator probe according to claim 1, is characterized in that: described guide shaft displacement measuring device comprises magnetic grid (26) and displacement transducer (27); Described magnetic grid (26) is axially fixed in the side of guide shaft along guide shaft, institute's displacement sensors (27) is fixed on support (21); Magnetic grid (26) is relative with displacement transducer (27), and displacement transducer (27) catches the displacement of magnetic grid (26).
3. comparator probe according to claim 1, is characterized in that: described position block (25) front end geometry is suitable with the workpiece end face shape to be processed contacted with it, or is plane.
4. based on a section bar initial point difference measurement method for comparator probe described in power 1 or 2, it is characterized in that: comprising: section bar initial point difference measuring system;
Described section bar initial point difference measuring system comprises: fixture (1), comparator probe (2), workpiece (3) and workbench lathe bed (4); Described fixture (1) is arranged on the guide rail of workbench lathe bed (4) side, according to requirements can fix, and also craft or servo-drive can adjust its position and lock; The guide rail that described comparator probe (2) is arranged on workbench lathe bed upper side runs along guide rail under the driving of servomotor; Described workpiece (3) is clamped on fixture (1);
Adopt the Principle and method of measurement concrete steps of above-mentioned section bar initial point difference measuring system as follows:
(1) first suppose that feed mechanism has a theoretical position when being brought by workpiece, namely workpiece has an original theoretical point position, and presets comparison detection device continue the amount of the breaking through L1 that passes by after initial position goes to this original theoretical point;
(2) workpiece to be processed is delivered to clamp;
(3) start comparison detection device, drive comparison detection device to walk from initial position to workpiece direction original theoretical point position continue the amount of the breaking through L1 that passes by by servomotor;
(4), when the actual initial point of workpiece overlaps with original theoretical point position, when comparison detection device goes to original theoretical point position, the position block of comparison detection device upper end just touches workpiece; Now when servomotor drives comparison detection device to continue to walk the amount of a breaking through L1, the guide shaft in comparison detection device can shrink back under the effect of workpiece pressure, learns by guide shaft displacement measuring device the distance L2 that guide shaft is drawn back; Now L1=L2, i.e. difference L=L1-L2=0;
In like manner, when the right side of the actual initial point of workpiece at original theoretical point, because position block touches workpiece after the meeting, so the backway L2<L1 of guide shaft, so just have L=L1-L2>0;
In like manner, when the left side of the actual initial point of workpiece at original theoretical point, because position block first can touch workpiece, so the backway L2>L1 of guide shaft, so just have L=L1-L2<0;
By calculating the difference L of L1 and L2, the position of the actual initial point of section bar just can be judged according to this difference:
L=L1-L2>0, actual origin position is more to the right than original theoretical point position;
L=L1-L2=0, actual origin position is than original theoretical point position consistency;
L=L1-L2<0, actual origin position is more to the left than original theoretical point position;
(5) after completing judgement, comparison detection device returns to initial position by driven by servomotor;
(6) head of machining center namely with the actual origin position of the section bar of said determination for benchmark is processed workpiece.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410567653.8A CN104325360A (en) | 2014-10-23 | 2014-10-23 | Comparing detector and comparing detector-based section original point difference measurement method |
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| CN201410567653.8A CN104325360A (en) | 2014-10-23 | 2014-10-23 | Comparing detector and comparing detector-based section original point difference measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111922485A (en) * | 2020-07-31 | 2020-11-13 | 北京圣龙博睿科技有限公司 | Method for determining origin of steam generating pipe with end face being inclined plane and automatically welding origin |
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Application publication date: 20150204 |