CN2513993Y

CN2513993Y - Glass substrate cutter apron device

Info

Publication number: CN2513993Y
Application number: CN 01275129
Authority: CN
Inventors: 蔡武融; 温优泽; 张耀仁; 赵俊毓
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2001-12-05
Filing date: 2001-12-05
Publication date: 2002-10-02
Anticipated expiration: 2011-12-05

Abstract

The utility model relates to a cutter seat device of a glass substrate, which is mainly formed by that a servo motor is arranged on a machine frame; the servo motor is connected with a screw rod through a shaft coupling; a cutter seat which is provided with a cutting tool is fixedly provided with a screw cap; the cutter seat is connected with the screw rod through the screw cap; the servo motor drives the cutter seat lift; thus, the cutting tool carries out positional control and simultaneously carries out the limitation of the torsional force of the motor; when cutting glasses by using the transmission of the screw rod to convert the limitation of the torsional force to the contacting force of the glass, the cutting tool can contact with the surface of the glass at any time; definite contacting force can be kept to ensure the cutting mark smooth; better tracing ability is arranged to require good cutting quality.

Description

The cutters base device of glass substrate

Technical field

The utility model relates to a kind of cutters base device of glass substrate.

Background technology

Large-scale in recent years liquid-crystal display is by a large amount of production and application, and the glass substrate of its use is also gradually towards bigger thinner size development.This kind large-size glass substrate not only is difficult for cutting, and is very rigorous to the requirement of tolerance of dimension and cutting outward appearance simultaneously.And because the surface of glass is because of making the factor of error and table plane degree thereof, and have tens of height to hundreds of microns to rise and fall, the situation that this just rises and falls will be because of the difference of cut point position when cutting, and changes the contact force of cutter and glass.Certain value can't be kept as contact force, cutting quality will be had a strong impact on.Therefore cutting tool must be fast and accurately along with glass surface rises and falls lifting, and keeping certain contact force, and this is to the quality of glass surface tracing ability, will be the key factor that influences cutting quality.Present existing cutting tool has following two kinds:

One, rising sun nitre is done (Asahi Glass) (patent name: glass cutting machine (Glass CuttingMachine), Japanese publication number 01337638,2000): see also Fig. 1, be provided with air pressure inlet 11 and piston 12 in its tool rest 10, piston rod 13 belows connect cutter 14, and the ring set 15 of tool rest is provided with electromagnetism screw rod 16 in addition; The lifting displacement of these tool rest 10 corresponding glass substrates 17 is that the electromagnetism with electromagnetism screw rod 16 drives whole tool rest 10 and moves, the mode of following as for 14 pairs of glass substrate 17 surfaces of cutter is then controlled with air pressure, therefore when glass substrate 17 surface height rise and fall, cutter 14 utilizes the float design of piston rod 13, can keep and the contacting of glass substrate 17, but the mode of this kind air pressure control, to be difficult for precisely control because of the strength size, make and only can keep in touch, and can't keep certain contact force, therefore tracing ability is poor, and influences cutting quality, moreover the decline of tool rest fixed point, will change along with the difference of glass substrate thickness, the detecting of this glass surface position, and need to make whole device and control mode seem complicated with transmitter or other device detectings.

Two, Mitsubishi's diamond (Mitsuboshi Diamond) (patent name; Cutting head (Cutter head), Japanese kokai publication hei IO-158022,1996): see also Fig. 2, it is the loop bar 21 lifting displacements that drive tool rest 20 with hoisting appliance, the cutterhead 23 of lower end installing cutter 22 is pivoted in the tool rest 20 in addition, these cutterhead 23 tops and tool rest wall are established a spring 24, and with the tracing ability of spring 24 control cutters, when glass substrate 25 surface height rose and fell, cutter 22 utilized cutterhead 23 to press spring 24, can keep and the contacting of glass substrate 25, but this kind is in spring controlled mode, easily because of strength size is difficult for precisely control,, can't keep certain contact force though can keep and the contacting of glass substrate, so tracing ability is not good, and the glass surface position detecting also needs equally also to seem complicated with transmitter or other device detectings.

Summary of the invention

Technical problem to be solved in the utility model is the above-mentioned deficiency at prior art, and provides a kind of tracing ability good and itself can detect the tool rest device of cutter and glass surface distance.

Above-mentioned technical problem of the present utility model is realized by following technical scheme.

A kind of cutters base device of glass substrate is characterized in that: installing one connects the servomotor of controlling start by controller on frame, and this servomotor connects a screw rod, and a tool rest that is equiped with cutting tool then is screwed together on the screw rod; By this, utilize restriction servomotor received current to carry out the restriction of outputting torsion, and be converted to the strength restriction of cutter in rectilinear direction, control keeps the contact force of cutter to glass substrate.

Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:

The outputting torsion limit setting of this servomotor utilizes contacting of cutter and glass baseplate surface when very little, the detecting point position of detecting glass baseplate surface is with the setting as the tool feeding position.

This servomotor is with the shaft coupling connecting screw rod, rotates to drive screw rod.

This tool rest is provided with a nut that screws togather with screw rod, to drive the lifting of tool rest straight line.

This tool rest is provided with the tool rest axle, is equiped with the fixed block of cutter to connect one, and drives the cutter lifting by tool rest.

Be provided with a buffered teething ring pad between this tool rest axle and fixed block, to avoid the surface of cutter in contact moment cutter gravity impact glass substrate.

Advantage of the present utility model is:

Utilize servomotor under the pattern of position control, can control the characteristic of outputting torsion restriction by received current, with the restriction of this outputting torsion, through the transmission of screw rod, be converted to the strength restriction of tool rest in rectilinear direction, the restriction of strength by this, the cutter on the control tool rest is to the contact force of glass substrate, when cutter contacts with glass surface, both contact forces can keep certain value, and, keep the even of cutting tool marks with preferable tracing ability, obtain preferable cutting quality.

Before the glass-cutting substrate, motor torsion limit setting is extremely very little, make the downward feeding of cutter again, when cutter contacts with glass baseplate surface, contact force (torsion) moment rises to torque settings, this moment by position control sharp weapon read the tool position, this position is contacting points position, and detect the glass baseplate surface position, with setting as the tool feeding position.

Understand in depth for the utility model is had further, exemplify a preferred embodiment now, and cooperate

Description of drawings is as back:

Description of drawings

Fig. 1: the diagrammatic cross-section of known cutting tool rest one.

Fig. 2: the diagrammatic cross-section of known cutting tool rest two.

Fig. 3: combination section of the present utility model.

Fig. 4: the exploded view of the utility model tool rest.

Fig. 5: use synoptic diagram of the present utility model.

Fig. 6: control loop figure of the present utility model.

Fig. 7: the synoptic diagram of the utility model feeding.

Fig. 8: the synoptic diagram of the utility model operating state ().

Fig. 9: the synoptic diagram of the utility model operating state (two).

Embodiment

See also Fig. 3,4, the utility model is installing one servomotor 31 on frame 30, this servomotor 31 connects ball screw 33 with shaft coupling 32 in frame 30, rotate and drive ball screw 33, another is locked in the nut 35 on the tool rest 34, then screw togather, and then, make tool rest 34 can do the displacement of lifting by the transmission of screw mandrel 33 with ball screw 33; Wherein, tool rest 34 is provided with tool rest axle 36, this tool rest axle 36 belows lock is established a buffered teething ring pad 37, to avoid contacting moment glass baseplate surface there is detrimentally affect, another 39 locks of fixed block that are equiped with cutter 38 are established and are connected in teething ring pad 37, can drive cutter 38 lifting displacements by tool rest 34.See also Fig. 5,6, command position is set in lower position (the glass baseplate surface position detecting of glass baseplate surface lower-most point during cutting, in next section explanation), when servomotor 31 drives cutters 38 and drops to contact glass substrate 40 and cut, do not reach command position when compressing glass substrate 40 because of cutter 38, so produce a positionerror, this positionerror is through K _PAmplification is as speed command, and speed command and velocity feedback are subtracted each other generation one velocity error, and this velocity error is through K _VAmplification is as current order, current order control actual current size, and the servomotor outputting torsion is proportional to the actual current size, therefore the utility model utilizes servomotor 31 under the pattern of position control, by electric current restriction signal and current limit circuit strangulation current order size, with restriction actual motor size of current, and then the outputting torsion size of restriction motor, with the restriction of this outputting torsion via the transmission of ball screw 33 with nut 35, be converted to the strength restriction of tool rest 34, and the restriction of this strength is the contact force of the 38 pairs of glass substrates 40 of cutter on the may command tool rest 34 in rectilinear direction; Size (this size can be exchanged into the torsion that servomotor 31 is exported, that is the size of the magnitude of current) by setting contact force then when cutter 38 contacts with glass substrate 40, maintains contact force in this set(ting)value, and keeps the homogeneity of cutting tool marks.Please continue and consult Fig. 5, before carrying out glass substrate 40 cuttings, at first need carry out the detecting of glass substrate 40 surface locations, it is after earlier the restriction of servomotor 31 torsion being turned down, with cutter 38 past glass substrate 40 surperficial feedings, when cutter 38 touches glass substrate 40 surfaces, torsion moment rises to set(ting)value, and cutter 38 promptly stops to descend, because previous set(ting)value was less, when cutter 38 contact glass substrates 40, can avoid big bump and wound to cut glass surface, the fixed point that this cutter 38 descends can be read numerical value by controller, this is the positions of glass substrate 40 surface detecting point, and then can calculate the distance H of detecting point and cutter ₁See also Fig. 7, the surface of glass substrate 40 is because of making the factor of error and table plane degree thereof, and has tens of height to hundreds of microns to rise and fall, with this worst error value H that just rises and falls ₂Add that aforementioned detecting learns the distance H of glass substrate 40 surface and cutter 38 ₁, be the maximum possible distance of cutter 38 and glass substrate 40 surperficial lower-most points, cutter 38 strokes are set for above this maximum possible distance, can guarantee that then cutter 38 can arrive the lower-most point on glass substrate 40 surfaces; With the maximum possible distance (H of cutter 38 with glass substrate 40 surperficial lower-most points ₁+ H ₂) add the cutting allowance, as tool feeding apart from S.See also Fig. 8, when cutter 38 cuttings are advanced, if run into the last salient point of glass substrate 40, then cutter 38 rises because of surpassing the torsion restriction, behind servomotor torsion limits value, cutter 38 stops to rise, and cutter 38 kept in touch and be maintained at the strength that contacts that sets with glass substrate 40 surfaces this moment.See also Fig. 9, when cutter 38 cuttings are advanced, if run into the Lower pit of glass substrate 40, then cutter 38 does not descend because of reaching the torsion limits value, up to surface in contact and after reaching servomotor torsion limits value, cutter 38 stops to descend, and cutter 38 kept in touch and be maintained at the strength that contacts that sets with glass substrate 40 surfaces this moment.

In view of the above, the utility model itself is except that the distance that can detect cutter and glass surface, and by electronically controlled rapid reaction, can be when cutter glass-cutting substrate, cutter is contacted with glass baseplate surface at any time, and keep certain contact force, and, obtain good cutting quality with preferable tracing ability.

In sum, the utility model is the design of a dark tool practicality and progressive in fact, and so not seeing has identical product and publication openly, thereby the novel patent application important document of fair symbol is filed an application in accordance with the law.

Claims

1, a kind of cutters base device of glass substrate is characterized in that: installing one connects the servomotor of controlling start by controller on frame, and this servomotor connects a screw rod, and a tool rest that is equiped with cutting tool then is screwed together on the screw rod.

2, the cutters base device of glass substrate according to claim 1 is characterized in that: this servomotor is with the shaft coupling connecting screw rod.

3, the cutters base device of glass substrate according to claim 1 is characterized in that: this tool rest is provided with a nut that screws togather with screw rod.

4, the cutters base device of glass substrate according to claim 1, it is characterized in that: this tool rest is provided with the tool rest axle, to connect a fixed block that is equiped with cutter.

5, the cutters base device of glass substrate according to claim 5 is characterized in that: be provided with a buffered teething ring pad between this tool rest axle and fixed block.