CN106870917B

CN106870917B - Efficient safety light curtain of bending machine and bending machine control method

Info

Publication number: CN106870917B
Application number: CN201710161381.5A
Authority: CN
Inventors: 许峥; 吴达通; 付红芝; 林忠; 曹宇
Original assignee: Noble Shanghai Industrial Automation Co ltd
Current assignee: Noble Shanghai Industrial Automation Co ltd
Priority date: 2017-03-17
Filing date: 2017-03-17
Publication date: 2023-06-20
Anticipated expiration: 2037-03-17
Also published as: CN106870917A

Abstract

The invention provides a high-efficiency safety light curtain of a bending machine and a bending machine control method, belonging to the field of machining equipment, and comprising a light curtain emitter and a light curtain receiver; the light curtain emitter is provided with an emitting point capable of emitting light blocks; the light curtain receiver is provided with a plurality of receiving points; the plurality of receiving points form three vertically distributed protection areas and a plurality of horizontally distributed protection areas; each protection zone can be shielded relatively independently; when the unshielded receiving point cannot receive the light block emitted by the emitting point, a control electric signal for controlling the emergency stop of the bending machine is generated. Compared with the prior art, the invention can change various protection modes by selectively shielding three vertically distributed protection areas so as to cope with bending operations under different conditions and realize requirements of different bending working conditions and safety protection effect; and selectively shields the horizontally distributed protection area to realize the instant shielding function, the height of the speed conversion point is reduced, and the production efficiency is improved.

Description

Efficient safety light curtain of bending machine and bending machine control method

Technical Field

The invention relates to the field of machining equipment, in particular to a high-efficiency safety light curtain of a bending machine and a bending machine control method.

Background

The safety light curtain, also called safety grating, punch protector, infrared safety protector, etc. is one kind of photoelectric safety protector. The working principle is that the protective light curtain is generated by emitting infrared rays, when the light curtain is shielded, the device sends out shading signals to control mechanical equipment with potential danger to stop working, so that safety accidents are avoided.

In modern chemical industry plants, people and machines work cooperatively, and safety light curtains are required to be arranged in dangerous areas such as mechanical conveying and carrying equipment, various mechanical processing lathes, toxic, high-pressure, high-temperature and the like, which are easy to cause personal injury of operators.

Most of the safety light curtains in the prior art are of a general structure, and bending actions of a bending machine are not further optimized, so that light spots are easily shielded by an upper pressing plate in the box folding process, and therefore the safety light curtains cannot work in the box folding process and cannot play a protective role; moreover, the stopping distance of the bending machine cannot be detected, and the safety requirement is not high; in addition, because current bender protection device support is fixed, when changing different moulds, the altitude mixture control is inconvenient, and the skew angle about, skew angle about can not be transferred, causes the course of working to waste time and energy.

Disclosure of Invention

The invention aims to provide a multi-point safety light curtain which can be applied to box folding operation and can improve the working efficiency of a bending machine, and a control method of the bending machine applying the multi-point safety light curtain.

In order to achieve the above purpose, the invention provides a high-efficiency safety light curtain of a bending machine, which comprises a light curtain emitter and a light curtain receiver;

the light curtain emitter is provided with an emitting point capable of emitting light blocks;

the light curtain receiver is provided with a plurality of receiving points corresponding to the light blocks emitted by the emitting points, and the receiving points are photosensitive elements; the plurality of receiving points form three vertically distributed protection areas and a plurality of horizontally distributed protection areas which are parallel to each other; each protection zone can be shielded relatively independently;

when the unshielded receiving point cannot receive the light block emitted by the emitting point, a control electric signal for controlling the emergency stop of the bending machine is generated.

Further, the three vertically distributed protection areas are a rear protection area, a middle protection area and a front protection area; the rear protection area comprises a first receiving point, a second receiving point and a third receiving point, and the three emitting points are positioned on the same vertical line; the middle protection area comprises a fourth receiving point, a fifth receiving point and a sixth receiving point, and the three emitting points are positioned on the same vertical line; the front protection area comprises a seventh receiving point, an eighth receiving point and a ninth receiving point, and the three emitting points are positioned on the same vertical line;

and the connection lines of the first receiving point, the fourth receiving point and the seventh receiving point, the connection lines of the second receiving point, the fifth receiving point and the eighth receiving point, and the connection lines of the third receiving point, the sixth receiving point and the ninth receiving point form three protection areas which are horizontally distributed.

Further, the seventh receiving point is located at a higher height than the fourth receiving point, which is located at a height equal to the height of the first receiving point.

Further, the distance between the fourth receiving point and the sixth receiving point is greater than the mechanical stopping distance of the bending machine, and the mechanical stopping distance is the distance moved before the bending machine finally stops after receiving the control electric signal.

Further, the bending machine comprises a mounting bracket for respectively mounting the light curtain emitter and the light curtain receiver to an upper beam of the bending machine; the mounting bracket includes:

the bracket fixing seat is provided with a fixing groove, and the central line direction of the fixing groove is a first direction; the fixing groove is fixedly connected with the rack of the equipment to be protected through a fastening bolt capable of moving in the fixing groove;

the cross beam is fixedly connected with the bracket fixing seat, and the arrangement direction of the cross beam is a second direction;

the vertical beam is connected with the cross beam through a track mechanism and a locking mechanism, the arrangement direction of the vertical beams is a third direction, and the vertical beams can move in the third direction relative to the cross beams;

the first adjusting block is fixed at the end part of the vertical beam;

one side of the second adjusting block is hinged with the first adjusting block through a first rotating shaft, and the other side of the second adjusting block is fixedly connected with the first adjusting block through a first screw and a first screw top; the axial direction of the first rotating shaft is a fourth direction;

the middle part of the third adjusting block is provided with a hinging seat, the hinging seat is hinged with the second adjusting block through a second rotating shaft, and the side surface of the third adjusting block is fixedly connected with the second adjusting block through a second screw and a second screw top; the axis of the second rotating shaft the direction is the first five directions;

one side of the fourth regulating block is hinged with the third regulating block through a third rotating shaft, and the other side of the fourth regulating block is fixedly connected with the second regulating block through a third screw and a third screw top; the axial direction of the third rotating shaft is a sixth direction; the fourth regulating block is provided with a fixed position for installing a light curtain emitter or a light curtain receiver;

the first direction, the second direction and the third direction are perpendicular to each other, the fourth direction, the fifth direction and the sixth direction are perpendicular in pairs.

Further, the track mechanism comprises a track and a sliding block, wherein the track is arranged on one side of the vertical beam, and the arrangement direction of the track is a third direction; the sliding block is arranged on the cross beam and is connected with the track in an adaptive manner;

the locking mechanism comprises a fixed wrench, an I-shaped nut and a height adjusting block; the vertical beam is provided with a groove in the vertical direction, one end of the I-shaped nut is accommodated in the groove, the other end of the I-shaped nut passes through the height adjusting block and is connected with the fixed spanner, and the fixed spanner rotates to enable the I-shaped nut and the height adjusting block to clamp the edge of the groove;

and a blocking block is fixed on the cross beam and props against the height adjusting block so as to fix the vertical beam in the vertical direction.

Further, the height adjusting block is connected with a fine adjusting mechanism, the fine adjustment mechanism comprises a fine adjustment cap, a vibration prevention block, a vertical large screw rod and a horizontal small screw rod; the vibration-proof block is tightly attached to the bottom surface of the fine tuning cap; the top of the vertical large screw rod is fixed in a threaded hole in the height adjusting block; the horizontal small screw rod is fixed in the fine adjustment cap, the fine adjustment cap is sleeved on the vertical large screw rod, and the end part of the horizontal small screw rod acts on the thread of the vertical large screw rod.

Further, a positioning piece is arranged on the cross beam, and a limiting pin is arranged at one end of the vertical beam; when the vertical beam moves to the maximum travel of the opposite cross beam, the locating piece clamps the limiting pin to fix the vertical beam and the cross beam.

In addition, the invention also provides a high-efficiency bending machine control method,

the light curtain emitter and the light curtain receiver of the high-efficiency bending machine safety light curtain are arranged on the bending machine;

setting the position of a speed conversion point according to the thickness of the metal plate to be processed; the upper beam of the bending machine is in a fast descending mode in a travel above a speed conversion point, and is in a slow descending mode in a travel below the speed conversion point, and the multipoint safety light curtain is set to work only in the fast descending mode;

in the working state of the multipoint safety light curtain, when the multipoint safety light curtain works for the first time, recording that under the normal working condition, when a sixth receiving point reaches a metal plate to be processed, setting the position of an upper beam of the bending machine below the position, wherein a third receiving point, the sixth receiving point and a ninth receiving point do not work, and other receiving points work normally;

similarly, when the first time works, and under the condition of normal operation, the position of the upper beam of the bending machine is recorded when the fifth receiving point reaches the metal plate to be processed, and is set below the position, the second receiving point, the fifth receiving point and the eighth receiving point do not work, and the first receiving point, the fourth receiving point and the seventh receiving point work normally;

and when the fourth receiving point reaches the sheet metal to be processed, namely the switching point with the set speed, the position of the upper beam of the bending machine is set below the position, and all the receiving points do not work.

Further, the position of the speed conversion point is set to be 2-3 mm higher than the upper surface of the metal plate; the installation position of the fourth receiving point is 2-3 mm away from the upper die cutter point; and connecting lines of the fourth receiving point, the fifth receiving point and the sixth receiving point are 1.5-2.5 mm backward from the bending line.

Compared with the prior art, the high-efficiency bending machine safety light curtain provided by the invention can change various protection modes by selectively shielding three vertically distributed protection areas so as to cope with bending operations under different conditions and realize requirements and safety protection effects of different bending working conditions; and the protection areas distributed horizontally are selectively shielded, so that the instant shielding function is realized, the height of a speed conversion point is reduced, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a high-efficiency safety light curtain of a bending machine;

FIG. 2 is a schematic diagram of a panel of a light curtain receiver of the high-efficiency safety light curtain of the bending machine;

FIG. 3 is a schematic diagram of a panel of a light curtain emitter of the high efficiency bender safety light curtain provided by the present invention;

FIG. 4 is a block diagram of the high-efficiency safety light curtain of the bending machine in a first protection mode;

FIG. 5 is a block diagram of the high-efficiency safety light curtain of the bending machine in a second protection mode;

FIG. 6 is a block diagram of the high-efficiency safety light curtain of the bending machine in a third protection mode;

FIG. 7 is a schematic view of a high-efficiency safety light curtain of a bending machine, which is provided by the invention, encountering an obstacle when all protection areas are not shielded;

fig. 8 is a schematic diagram of a protection area a being shielded when the high-efficiency bending machine safety light curtain provided by the invention is shielded in real time;

figure 9 shows the high efficiency safety light curtain of bending machine provided by the invention when it is shielded in real time, B, a schematic view of the shielded protection area;

fig. 10 is a schematic diagram of a C protection area shielded during instant shielding of the high-efficiency bending machine safety light curtain provided by the invention;

FIG. 11 is a schematic diagram of the principle of the high-efficiency safety light curtain of the bending machine when encountering an obstacle during instant shielding;

fig. 12 is a schematic structural view of a mounting bracket of a high-efficiency safety light curtain of a bending machine in a first direction;

fig. 13 is a schematic structural view of a mounting bracket of a high-efficiency safety light curtain of a bending machine in a second direction;

fig. 14 is a schematic structural view of a locking mechanism of a mounting bracket provided by the invention in a first direction;

fig. 15 is a schematic structural view of a locking mechanism of a mounting bracket provided by the invention in a second direction;

FIG. 16 is a cross-sectional view of the locking mechanism shown in FIG. 15;

FIG. 17 is a schematic diagram of a connection structure between a first adjusting block and a second adjusting block of a mounting bracket according to the present invention;

FIG. 18 is a schematic diagram of a connection structure between a second adjusting block and a third adjusting block of the mounting bracket according to the present invention;

fig. 19 is a schematic diagram of a connection structure between a third adjusting block and a fourth adjusting block of the mounting bracket provided by the invention;

fig. 20 is a schematic structural view of a positioning member of a mounting bracket according to the present invention.

Reference numerals:

1-mounting a bracket; 2-a light curtain emitter; 3-a light curtain receiver;

4-post a blocking finger; 5-a workpiece; 6-upper die;

7-lower die; 8-obstacle;

11-a bracket fixing seat; 12-a cross beam; 13-vertical beams;

14-a first adjusting block; 15-a second adjustment block; 16-a third adjustment block;

17-a fourth adjustment block; 18-a locking mechanism; 19-a fine adjustment mechanism;

20-a track mechanism; 111-a fixed slot; 121-a blocking piece;

122-pointer; 123-positioning pieces; 124-springs;

131-grooves; 132-a limiting pin; 141-a first rotating shaft;

142-first screws; 143-a first silk roof; 151-a second spindle;

152-a second screw; 153-second filament top; 161-a third spindle;

162-third screw; 163-third filament top; 181-fixed wrench;

182-I type nut; 183-height adjustment block; 191-trimming cap;

192-vertical large screw rod; 193-horizontal small screw rod; 194-vibration-proof blocks;

201-track; 202-a slider; 203-an upper limit assembly;

204-a lower limit assembly; 31-a first receiving point; 32-a second receiving point;

33-a third receiving point; 34-fourth receiving point; 35-a fifth receiving point;

36-sixth receiving point; 37-seventh receiving point; 38-eighth receiving point;

39-a ninth receiving point; 100-post-guard region; 200-middle protection area;

300-a front guard region; 400-A guard region; 500-B guard region;

600-C protection region.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-3, the invention provides a high-efficiency safety light curtain of a bending machine, which comprises a light curtain emitter 2, a light curtain receiver 3 and two mounting brackets 1; the light curtain emitter 2 is provided with an emitting point capable of emitting light blocks, in this embodiment, the light emitted by the emitting point is infrared light, the CLASS 1M infrared laser is visible safe laser under normal conditions, and the light curtain emitter has stable phase performance and strong anti-interference capability.

The light curtain receiver 3 is provided with a plurality of receiving points corresponding to the light blocks, the receiving points are distributed at different positions and correspond to different areas of the light blocks, and the receiving points are photosensitive elements; the two mounting brackets 1 respectively mount the light curtain emitter 2 and the light curtain receiver 3 to the mounting bracket 1 of the upper beam of the bending machine, so that the emitting point of the light curtain emitter 2 is aligned with the receiving point of the light curtain receiver 3; when the photosensitive element does not receive the light emitted by the light curtain emitter 2, a control electric signal for controlling the emergency stop of the bending machine is generated.

In this embodiment, the light curtain receiver 3 is provided with a first receiving point 31, a second receiving point 32, a third receiving point 33, a fourth receiving point 34, a fifth receiving point 35, a sixth receiving point 36, a seventh receiving point 37, an eighth receiving point 38 and a ninth receiving point 39.

The connecting lines of the first receiving point 31, the second receiving point 32 and the third receiving point 33 are vertical, and form a rear protection area 100, the rear protection area 100 is used for protecting the rear part of the bending working area of the bending machine correspondingly, and the rear protection area 100 is used for mainly protecting the rear baffle finger 4 or other objects from collision with the upper die 6 under the unexpected condition;

the connecting lines of the fourth receiving point 34, the fifth receiving point 35 and the sixth receiving point 36 are vertical, and form a middle protection area 200, and the middle protection area 200 is used for protecting the bending working area of the bending machine, mainly protecting the position of a cutter point and preventing collision with other obstacles 8, and mainly protecting the accident of hands of people;

moreover, the connection lines of the fourth receiving point 34, the fifth receiving point 35 and the sixth receiving point 36 are 2mm backward from the bending line, and at this time, the fourth receiving point 34, the fifth receiving point 35 and the sixth receiving point 36 are prevented from stopping the downward motion of the machine due to the fact that the other edges are prevented from being blocked by too early in the process of folding the box;

the connecting lines of the seventh receiving point 37, the eighth receiving point 38 and the ninth receiving point 39 are vertical, and form a front protection area 300, which corresponds to the front part of the bending working area of the bending machine, so that the hands of people are mainly protected from collision when grabbing metal plates.

It is particularly important that the first, fourth and seventh receiving points 31, 34, 37 form a C-protected area 600, the second, fifth and eighth receiving points 32, 35, 38 form a B-protected area 500, and the third, sixth and ninth receiving points 33, 36, 39 form an a-protected area 400.

The high-efficiency safety light curtain of the bending machine has the following installation positions:

the fourth receiving point 34 is to be located at least 2mm from the tip of the upper die 6. The fourth receiving point 34 to the sixth receiving point 36 are a prescribed safe distance, and the mechanical stop distance should be smaller than the safe distance. The mechanical stopping distance is a performance parameter of the bending machine. The mechanical stopping distance is generated because the upper beam has a certain response time after the downward movement signal of the upper beam stops in the downward movement process because the upper beam has a certain inertia and is also influenced by the combination of the mechanical characteristics and the hydraulic characteristics of the machine tool, and the upper beam can continuously descend for a small distance and then stops, wherein the small distance is used as the mechanical stopping distance.

The high-efficiency bending machine safety light curtain provided by the invention has the advantages that the emitting points positioned in different protection areas can be shielded relatively independently, namely, the rear protection area 100, the middle protection area 200 and the front protection area 300 can be shielded respectively; according to the different shielding states of the rear protection area 100, the middle protection area 200 and the front protection area 300, the high-efficiency bending machine safety light curtain provided by the invention can have three working modes.

First operation mode: referring to fig. 4, in the case of general bending, that is, when the workpiece 5 to be bent is a sheet metal plate, the emission points of the three areas of the front protection area 300, the middle protection area 200 and the rear protection area 100 are all not shielded.

Second mode of operation: referring to fig. 5, if the structure of the workpiece 5 to be bent is as shown in fig. 5 during the process of folding the box, the rear guard finger 4 needs to be moved to be relatively close to the lower side of the third receiving point 33 during normal bending, so that the rear guard area 100 needs to be shielded in order to avoid unexpected machine shutdown; since the flange of the box is below the ninth receiving point 39 during normal bending, the front protection area 300 is also shielded in order to avoid accidental machine shut down.

Third mode of operation: referring to fig. 6, in the process of folding the box, if the structure of the workpiece 5 to be folded is as shown in fig. 6, the rear finger 4 needs to be moved below the third receiving point 33, and the folded edge without metal plate is below the ninth receiving point 39, only the rear protection area 100 is shielded, and the middle protection area 200 and the front protection area 300 work normally.

Compared with the prior art, the high-efficiency bending machine safety light curtain provided by the invention has the advantages that a plurality of emission points form three different protection areas of the front protection area 300, the middle protection area 200 and the rear protection area 100, and the three different protection areas act on the front, middle and rear parts of the bending area of the bending machine respectively; through the transmitting point in the different protection regions of shielding, can change multiple protection mode to deal with the bending operation of different circumstances, realize the requirement and the safety protection effect of different bending operating modes.

It is particularly important that the a protection region 400, the B protection region 500 and the C protection region 600 can also be shielded separately, depending on the design, an instant shielding function can be achieved, which is described in detail below.

Before introducing the instant shielding function, a plurality of key points (the key points refer to the knife tip positions) of the upper beam action of the bending machine and a control mode of the safety light curtain between different points are defined.

The key points are sequentially from top to bottom: the PMS is the top dead center and is the highest position of the artificially arranged upper beam; the PCV is a speed conversion point, the upper beam moves rapidly downwards at the distance from the PMS to the PCV, and the speed of the upper beam begins to be reduced after reaching the PCV; the PMI is the bottom dead center, which is the lowest position where the upper beam can descend.

The upper beam is fast moving downward between PMS and PCV points. The safety light curtain plays a role in protecting against accidental injury caused by collision between the upper beam upper die knife point and other obstacles 8 in the rapid descending process; at the distance between PCV and PMI, the upper beam is slowly moved downward, at which time the safety light curtain is inactive.

Since the distance from the fourth receiving point 34 to the sixth receiving point 36 is a safe distance, the mechanical stopping distance of the default machine is less than the safe distance. The mounting position requirement of the safety light curtain is that the fourth receiving point 34 is 2mm from the upper die tip. It is ensured that, during the fast downward movement, if the signal of the downward movement of the upper beam stops after the obstacle 8 is detected by the sixth receiving point 36, the controller has a certain response time due to a certain inertia of the upper beam, and the upper beam can continuously descend for a small distance and then stop, the distance between the tool nose and the obstacle 8 is at least 2mm, and the safety is ensured. Meanwhile, the PCV can be arranged at a position 2mm above the sheet metal due to the fact that the PCV is in a normal bending instant shielding function to the sheet metal workpiece 5.

The instant shielding function is based on the following principle:

as shown in fig. 7, when the safety light curtain moves downward in the fast-down stage following the upper beam, the safety light curtain cuts off the downward signal when the receiving point cannot receive the light due to the blocking of the light by the obstacle 8, and the upper beam stops after continuing to move downward for a mechanical stopping distance.

If the beam is still stopped when the sixth receiving point 36 moves downward to the position of the workpiece 5 because the workpiece 5 blocks light, but the position of the sixth receiving point 36 blocked at this time may be set to be a normal state, the light curtain device automatically records the position of the beam movement at this time, and the a protection area 400 formed by the sixth receiving point 36, the third receiving point 33 and the ninth receiving point 39 is set at this position to automatically shield the detection function, as shown in fig. 8. After the first setting, the upper beam is bent for the workpiece 5 with the same thickness, and when the upper beam moves to the position of the sixth receiving point 36 on the workpiece 5, the upper beam can continue to move downwards because the protection area A400 automatically shields, and the upper beam movement is not stopped.

Similarly, when the upper beam moves to the B protection area 500 for the first time and approaches to the workpiece 5, the same automatic shielding function after recording the position can be performed, as shown in fig. 9, and after the upper beam moves to the position, three receiving points of the B protection area 500 are automatically shielded, and the upper beam continues to move downwards rapidly.

Similarly, when the upper beam moves to the C-protection area 600 to approach the workpiece 5, since the speed change point PVC is set to at least 2mm, that is, the position of the fourth receiving point 34 is the position of the speed change point PVC, as shown in fig. 10, the upper beam moving speed is changed from fast down to slow down. The safety light curtain fails in the slow down phase.

The upper beam starts to slow down at the position of the tool nose at least 2mm away from the workpiece 5, which effectively shortens the distance from slow down to bending, shortens the processing time and improves the production efficiency.

This function ensures that when upper Liang Daojian reaches the PCV, the machine will not stop although the receiving point is already below the sheet metal, shortening the PCV to PMI distance to the greatest extent, in fact, the speed switching point can be set to 2mm at the least, greatly improving the production efficiency.

In addition to the above-mentioned position, shielding the corresponding area, detection of the obstacle 8 at the receiving point at other positions will still cut off the upper beam movement signal to stop the upper beam, as shown in fig. 11.

The high-efficiency bending machine safety light curtain provided by the invention has four safety levels. The four-stage light curtain has the following advantages: a first, dual CPU processor; second, dual secure channel output; thirdly, the control is more reliable in four-stage control; fourth, performing fault detection through self-diagnosis; fifth, have higher level fault mutual inspection.

In the present embodiment, referring to fig. 12 and 13, the mounting bracket 1 includes a bracket fixing seat 11, a cross beam 12, a vertical beam 13, a first adjustment block 14, a second adjustment block 15, a third adjustment block 16, and a fourth adjustment block 17.

The bracket fixing seat 11 is provided with a fixing groove 111, and the central line direction of the fixing groove 111 is the X-axis direction; the fixing groove 111 is fixedly connected with the frame of the equipment to be protected by a fastening bolt capable of moving in the fixing groove 111.

Loosening the fastening bolt to enable the fastening bolt to move in the fixing groove 111, so as to realize left and right movement of the bracket fixing seat 11 relative to the frame; when the movable part is moved to the position where it is located, tightening the fastening bolt to firmly fix the bracket fixing seat 11 on the frame, thereby realizing positioning; finally, the left and right positions are adjusted.

The cross beam 12 is fixedly connected with the bracket fixing seat 11, and the arrangement direction of the cross beam 12 is the Y-axis direction; the vertical beam 13 is connected to the cross beam 12 by a rail mechanism 20 and a locking mechanism 18.

Specifically:

the track mechanism 20 comprises a track 201 and a sliding block 202, wherein the track 201 is arranged on one side of the vertical beam 13, and the arrangement direction of the track 201 is the Z-axis direction; the slider 202 is mounted on the cross beam 12, the sliding block 202 is connected with the track 201 in a matching way; enabling the vertical beams 13 to move up and down along the rails 201 relative to the cross beams 12; in order to facilitate the handling of the vertical beams 13, handles are provided on the vertical beams 13; when moved into position, the vertical beams 13 are locked in position with the cross beams 12 by the locking mechanism 18.

Further, the method comprises the following steps:

referring to fig. 14-16, the locking mechanism 18 includes a stationary wrench 181, an I-nut 182, and a height adjustment block 183; the vertical beam 13 is provided with a groove 131 in the vertical direction, one end of the I-shaped nut 182 is accommodated in the groove 131, and the other end of the I-shaped nut passes through the height adjusting block 183 to be connected with the fixed spanner 181;

when the fixing wrench 181 is unscrewed, the I-type nut 182 is accommodated in the groove 131 without pressing force, and at this time, the I-type nut 182 can vertically move in the groove 131; when the I-shaped nut 182 is adjusted to a proper position relative to the vertical beam 13, the fixed spanner 181 is screwed, so that the I-shaped nut 182 moves outwards relative to the height adjusting block 183, the I-shaped nut 182 and the height adjusting block 183 clamp the edge of the groove 131, and the height adjusting block 183 is fixed at a proper position of the vertical beam 13;

a blocking block 121 is fixed on the cross beam 12, and the blocking block 121 abuts against the height adjusting block 183 so as to fix the vertical beam 13 in the vertical direction; finally, the adjustment of the upper and lower positions is realized.

The mounting bracket 1 in the prior art can also realize the adjustment of the upper and lower positions, and the positions are generally adjusted up and down by manually tightening screws, so that the error is larger; moreover, the height adjustment needs to be carried out by continuously tightening the screws, so that the time is long, and the adjustment efficiency is low.

In this regard, the upper beam mounting bracket 1 of the safety light curtain provided by the invention is also provided with a fine adjustment mechanism 19, and referring to fig. 14-16, the fine adjustment mechanism 19 is fixed on the height adjusting block 183; the fine adjustment mechanism 19 includes a fine adjustment cap 191, a vertical large screw 192, and a horizontal small screw 193; the top of the vertical large screw rod 192 is fixed in a threaded hole in the height adjusting block 183; the horizontal small screw rod 193 is fixed in the fine adjustment cap 191, the fine adjustment cap 191 is sleeved on the vertical large screw rod 192, and the end part of the horizontal small screw rod 193 acts on the threads of the vertical large screw rod 192. The bottom of the vertical large screw rod 192 is also connected with a vibration-proof block 194, and the vibration-proof block 194 is clung to the bottom surface of the fine adjustment cap 191.

The fine adjustment cap 191 is rotated, the horizontal small screw rod 193 moves along the screw thread of the vertical large screw rod 192, the vertical large screw rod 192 is driven to move relative to the height adjusting block 183, the positions of the vibration preventing block 194 and the height adjusting block 183 are adjusted, and finally the position of the vertical beam 13 relative to the cross beam 12 in the vertical direction is adjusted.

The fine adjustment mechanism 19 can be in the vertical direction, accurate careful height adjustment has the simple operation, and adjustment efficiency is high, controls accurate advantage.

In addition, a pointer 122 is disposed on the blocking block 121, and a scale line for indicating the height of the safety light curtain is disposed at a position of the vertical beam 13 corresponding to the pointer 122. The adaptation of pointer 122 and scale mark can be accurate the height of display light curtain transmitter 2 and light curtain receiver 3, makes the work that the adjustment was focused more convenient.

Referring to fig. 17, the first adjusting block 14 is fixed to the end of the vertical beam 13; the second adjusting block 15 is hinged with the first adjusting block 14 through a first rotating shaft 141, and the axis direction of the first rotating shaft 141 is the Y-axis direction; enabling the second regulating block 15 to rotate about the first rotation shaft 141 to adjust an angle between the second regulating block 15 and the first regulating block 14;

when the angle of the lens is adjusted to a proper angle, the positions of the first regulating block 14 and the second regulating block 15 are fixed through a first screw and a first screw top; finally, the adjustment of the upper and lower angles is realized.

Referring to fig. 18, a hinge seat is disposed in the middle of the third adjusting block 16, and is hinged to the middle of the second adjusting block 15 through a second rotating shaft 151, where an axis direction of the second rotating shaft 151 is a Z-axis direction; enabling the third regulating block 16 to rotate around the second rotation shaft 151 to adjust an angle between the third regulating block 16 and the second regulating block 15;

when the angle is adjusted to a proper angle, the side surface of the third adjusting block 16 is fixedly connected with the second adjusting block 15 through the second screw 152 and the second screw top 153, the angle between the two is locked; finally, the left and right angles are adjusted.

Referring to fig. 19, one side of the fourth adjusting block 17 is hinged to the third adjusting block 16 through a third rotating shaft 161, and an axial direction of the third rotating shaft 161 is an X-axis direction; enabling the fourth adjustment block 17 to rotate about the third rotation axis 161 to adjust the angle between the fourth adjustment block 17 and the third adjustment block 16;

when the angle is adjusted to a proper angle, the other side of the fourth adjusting block 17 is fixedly connected with the second adjusting block 15 through a third screw 162 and a third screw top 163, so that the angle between the third screw and the third screw top 163 is locked; finally, the adjustment of the front and back angles is realized.

The invention provides an upper beam mounting bracket 1 of a safety light curtain, when in use, a light curtain emitter 2 or a light curtain receiver 3 is mounted on a fixed position of a fourth regulating block 17, namely, the movement of the left and right positions, the movement of the up and down positions, the up and down angle adjustment, the left and right angle adjustment and the adjustment of the front and back angle of the light curtain emitter 2 or the light curtain receiver 3 can be easily realized; the degree of freedom of adjustment is high, can simplify the installation operation of light curtain transmitter 2 or light curtain receiver 3, can adopt multiple adjustment mode to combine together to adjust the mounted position, makes the mounted position adjustment convenient high-efficient, and the installation accuracy is higher.

The upper beam mounting bracket 1 of the safety light curtain is beneficial to the light curtain emitter 2 or the light curtain receiver 3 to light, especially for the multi-point safety light curtain, and is also beneficial to adjusting the arrangement position of the protection light so as to adapt to the protection requirements of different devices; in addition, because the position of the light curtain emitter 2 or the light curtain receiver 3 can be conveniently and accurately adjusted, the precision requirement on the manufacturing sizes of the light curtain emitter 2, the light curtain receiver 3 and other parts is lower, the manufacturing difficulty is also reduced to a certain extent, the equipment cost is reduced, and the production efficiency is improved.

The X-axis, Y-axis, and Z-axis described above form a rectangular coordinate system. Of course, this is only one embodiment of the present invention, and the above-described specific direction of the present invention is not limited thereto. For example, the center line direction of the fixing groove 111 is a first direction, the arrangement direction of the cross beam 12 is a second direction, and the arrangement direction of the vertical beam 13 is a third direction, the first direction, the second direction, and the third direction constituting a rectangular coordinate system; the axial direction of the first shaft 141 is a fourth direction, the axial direction of the second shaft 151 is a fifth direction, the axial direction of the third shaft 161 is a sixth direction, and the fourth direction, the fifth direction and the sixth direction form another rectangular coordinate system, and at least two axes in the two rectangular coordinate systems are parallel to each other.

In the bending production process of the sheet metal of the bending machine, an upper die cutter is sometimes required to be replaced. When the upper die cutter is longer, the upper die cutter is required to be pulled out from two sides of the bending machine, at the moment, the safety light curtains on two sides of the bending machine are required to be lifted to the highest positions, and a gap is reserved for pulling out the upper die cutter. In the prior art, when the operation is finished, the screw is locked after the screw is loosened to adjust the position, so that the time is more, and the die changing efficiency is lower.

In order to solve the above problems, in the upper beam mounting bracket 1 of the safety light curtain provided by the invention, a positioning piece 123 is arranged in a blocking block 121 of a cross beam 12, referring to fig. 20, one end of the positioning piece 123 is fixedly connected with the blocking block 121 through a spring 124, the middle part of the positioning piece 123 is hinged with the blocking block 121, and the other end of the positioning piece 123 is provided with a clamping hook part; one end of the vertical beam 13 is provided with a limiting pin 132.

However, when the tool changing operation is required, the safety light curtain can be quickly lifted to the highest position, the limiting pin 132 props against the clamping hook part, under the action of the spring 124, the hook portion pops up and returns to the original position, so that the limiting pin 132 is clamped on the limiting feature of the hook portion. The quick limit stop function of replacing the upper die cutter is realized, the time is saved, and the cutter replacing efficiency is improved.

When the upper and lower positions of the safety light curtain are adjusted, if the force is too strong, the safety light curtain is easy to collide with the frame, and damage is caused. In contrast, the upper beam mounting bracket 1 of the safety light curtain is provided with the upper limit component 203 and the lower limit component 204, and the upper limit component 203 and the lower limit component 204 limit the travel of the sliding block 202 within a safety range so as to avoid collision with a frame.

Meanwhile, the upper limit component 203 and the lower limit component 204 comprise limit blocks and buffer stop blocks, and the buffer stop blocks are fixedly connected with the limit blocks; the slider 202 is constrained between two bump stops. The buffer stop can buffer the impact force between the sliding block 202 and the upper limit assembly 203 or the lower limit assembly 204, and reduce the vibration of the safety light curtain.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The high-efficiency safety light curtain of the bending machine is characterized by comprising a light curtain emitter and a light curtain receiver;

when the unshielded receiving point cannot receive the light block sent by the transmitting point, a control electric signal for controlling the bending machine to stop emergently is generated;

the mounting bracket is used for respectively mounting the light curtain emitter and the light curtain receiver to the upper beam of the bending machine; the mounting bracket includes:

the vertical beam is connected with the cross beam through the track mechanism and the locking mechanism, the arrangement direction of the vertical beam is a third direction, and the vertical beam can move relative to the cross beam in the third direction;

the first adjusting block is fixed at the end part of the vertical beam;

the middle part of the third adjusting block is provided with a hinging seat, the hinging seat is hinged with the second adjusting block through a second rotating shaft, and the side surface of the third adjusting block is fixedly connected with the second adjusting block through a second screw and a second screw top; the axial direction of the second rotating shaft is a fifth direction;

the first direction, the second direction and the third direction are perpendicular in pairs, and the fourth direction, the fifth direction and the sixth direction are perpendicular in pairs; the X axis, the Y axis and the Z axis form a rectangular coordinate system, and the first direction and the sixth direction are X axis directions; the second direction and the fourth direction are Y-axis directions, and the third direction and the fifth direction are Z-axis directions.

2. The efficient safety light curtain for a bending machine according to claim 1, wherein the three vertically distributed protection zones are a rear protection zone, a middle protection zone and a front protection zone; the rear protection area comprises a first receiving point, a second receiving point and a third receiving point, and the three emitting points are positioned on the same vertical line; the middle protection area comprises a fourth receiving point, a fifth receiving point and a sixth receiving point, and the three emitting points are positioned on the same vertical line; the front protection area comprises a seventh receiving point, an eighth receiving point and a ninth receiving point, and the three emitting points are positioned on the same vertical line;

3. The efficient safety light curtain for a bending machine according to claim 2, wherein the seventh receiving point is higher than the fourth receiving point, which is equal to the first receiving point.

4. The efficient safety light curtain for a bending machine according to claim 2, wherein a distance between the fourth receiving point and the sixth receiving point is greater than a mechanical stopping distance of the bending machine, that is, a distance moved by the bending machine before the bending machine finally stops after receiving the control electric signal.

5. A high efficiency bending machine safety light curtain according to claim 1, wherein the rail mechanism comprises a rail and a slider, the rail is mounted on one side of a vertical beam, and the arrangement direction of the rail is a third direction; the sliding block is arranged on the cross beam and is connected with the track in an adaptive manner;

6. A high efficiency bending machine safety light curtain according to claim 5, wherein the height adjusting block is connected with a fine tuning mechanism, the fine tuning mechanism comprises a fine tuning cap, a vibration proof block, a vertical large screw rod and a horizontal small screw rod; the vibration-proof block is tightly attached to the bottom surface of the fine tuning cap; the top of the vertical large screw rod is fixed in a threaded hole in the height adjusting block; the horizontal small screw rod is fixed in the fine adjustment cap, the fine adjustment cap is sleeved on the vertical large screw rod, and the end part of the horizontal small screw rod acts on the thread of the vertical large screw rod.

7. The high-efficiency bending machine safety light curtain according to claim 1, wherein a positioning piece is arranged on the cross beam, and a limiting pin is arranged at one end of the vertical beam; when the vertical beam moves to the maximum travel of the opposite cross beam, the locating piece clamps the limiting pin to fix the vertical beam and the cross beam.

8. An efficient bending machine control method is characterized in that,

mounting a light curtain emitter and a light curtain receiver of the high efficiency bender safety light curtain of claim 3 on the bender;

9. A method of controlling a bending machine with high efficiency according to claim 8, wherein the position of the speed switching point is set to be 2-3 mm higher than the upper surface of the sheet metal; the installation position of the fourth receiving point is 2-3 mm away from the upper die cutter point; and connecting lines of the fourth receiving point, the fifth receiving point and the sixth receiving point are 1.5-2.5 mm backward from the bending line.