Double-hand and single-foot protection circuit for controlling bending machine

Abstract

The invention discloses a double-hand and single-foot protection circuit for bending machine control, and belongs to the technical field of bending machine control circuits, a power supply module is connected with a selective switch, the selective switch is connected with a pedal control module and a double-hand control module, and the pedal control module and the double-hand control module are both connected with an input module; the two-hand control module comprises a first branch circuit, a second branch circuit and a third branch circuit, the first branch circuit, the second branch circuit and the third branch circuit are all connected with the selection switch, the first branch circuit is connected with the second branch circuit and the third branch circuit, and the second branch circuit is connected with the third branch circuit; the third branch is connected with the input module, and the input module is connected with a system IO input port. By means of the mode, double-hand protection is added on the pedal control unit of the bending machine, and double-hand starting is achieved, so that the situation that the double hands are injured by the bending machine is avoided, and personal safety is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bending machine control circuits, and in particular to a two-handed and one-foot protection circuit for bending machine control. Background Art

[0002] A bending machine is a metal processing device that is mainly used to plastically deform metal sheets, metal strips, metal tubes, etc. through pressure to form specific angles and shapes. Bending machines are widely used in the manufacturing industry, especially in the fields of metal structures, shipbuilding, automobiles, aviation, construction, furniture, etc.

[0003] For example, Chinese patent CN214517263U discloses a limit protection device for an air-conditioning pipe bending machine, including a mounting frame fixedly mounted on the bending machine, a horizontally arranged first mounting rod, a second mounting rod vertically arranged to the first mounting rod, a mounting seat arranged on the second mounting rod, and a photoelectric sensing switch fixedly mounted on the mounting seat; the photoelectric sensing switch is connected to the circuit control system of the bending machine, and the detection end of the photoelectric sensing switch is directed toward between the upper and lower molds of the bending machine; one end of the first mounting rod is connected to the mounting frame, and the other end is connected to one end of the second mounting rod, and the end of the second mounting rod away from the first mounting rod is connected to the mounting seat.

[0004] However, the technology has the following problems: the technology detects the operator's hands through a photoelectric sensor, but after long-term use, the sensitivity of the photoelectric sensor will decrease, causing misjudgment, affecting work efficiency, and endangering the operator's personal safety.

[0005] Based on this, the present invention designs a two-hand and one-foot protection circuit for bending machine control to solve the above problem. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a two-handed and one-foot protection circuit for controlling a bending machine.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A two-handed single-foot protection circuit for controlling a bending machine comprises a power module, the power module is connected to a selection switch, the selection switch is connected to a foot control module and a two-handed control module, and the foot control module and the two-handed control module are both connected to an input module;

[0009] The two-hand control module includes a first branch, a second branch and a third branch, wherein the first branch, the second branch and the third branch are all connected to the selection switch, the first branch is connected to the second branch and the third branch, and the second branch is connected to the third branch;

[0010] The third branch is connected to the input module; the input module is connected to the system IO input port.

[0011] Furthermore, the selection switch is a switch SA1; one end of the switch SA1 is connected to the positive pole of the power module, and the other end of the switch SA1 is connected to both the foot control module and the two-hand control module.

[0012] Furthermore, the first branch includes button SB6, normally closed contacts 55-56 of KA29 relay, normally open contacts 13-14 of KA30 relay and KA30 relay coil; one end of button SB6 is connected to normally closed contacts 55-56 of KA29 relay and normally open contacts 13-14 of KA30 relay, and the other ends of normally closed contacts 55-56 of KA29 relay and normally open contacts 13-14 of KA30 relay are connected to KA30 relay coil.

[0013] Furthermore, the second branch includes button SB7, normally closed contacts 55-56 of KA30 relay, normally open contacts 13-14 of KA29 relay and KA29 relay coil; one end of button SB7 is connected to normally closed contacts 55-56 of KA30 relay and normally open contacts 13-14 of KA29 relay, and the other ends of normally closed contacts 55-56 of KA30 relay and normally open contacts 13-14 of KA29 relay are connected to KA29 relay coil.

[0014] Furthermore, the third branch includes the normally open contacts 43-44 of the KA29 relay, the normally open contacts 43-44 of the KA30 relay, the KA31 relay coil and the diode; one end of the normally open contacts 43-44 of the KA29 relay is connected to one end of the normally open contacts 43-44 of the KA30 relay, the other end of the normally open contacts 43-44 of the KA30 relay is connected to one end of the KA31 relay coil, and both ends of the KA31 relay coil are connected in parallel with the diode.

[0015] Furthermore, the other end of the switch SA1 is connected to the other end of the button SB6, the other end of the button SB7, and the other end of the normally open contacts 43-44 of the KA29 relay.

[0016] Furthermore, the other end of the KA29 relay coil, the other end of the KA30 relay coil, and the other end of the KA31 relay coil are all connected to the negative pole of the power module.

[0017] Furthermore, the foot control module includes a down pedal SF1, one end of the down pedal SF1 is connected to the other end of the selection switch, and the other end of the down pedal SF1 is connected to one end of the KA31 relay coil.

[0018] Furthermore, the input module includes a normally open contact 11-14 of a KA31 relay and an upward pedal SF2, one end of the normally open contact 11-14 of the KA31 relay is connected to the power module, the other end of the normally open contact 11-14 of the KA31 relay is connected to the IO input of the bending machine control system, one end of the upward pedal SF2 is connected to the power module, and the other end of the pedal SF2 is connected to the IO input of the bending machine control system.

[0019] Compared with the prior art, the present invention has the following beneficial effects: when the present invention is used, when the slide plate is controlled to move downward by the two-hand buttons, the power module first turns on the first branch and the second branch through the selection switch, and the third branch is powered thereby. After the third branch is powered, the downward command channel of the input module is turned on, and the slide plate downward command is sent to the bending machine control system;

[0020] When the slide plate is controlled to move downward by the foot pedal, the power module turns on the foot pedal control module through the selection switch. After the foot pedal control module is powered on, the downward command channel of the input module is turned on, and the slide plate downward command is sent to the bending machine control system;

[0021] When controlling the skateboard to move upward, the input module is directly controlled to send a skateboard upward command to the system.

[0022] The present invention adds two-hand protection to the pedal control unit of the bending machine, and starts the machine by both hands, thus preventing the two hands from being hurt by the bending machine and effectively ensuring personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a connection block diagram of a two-hand and one-foot protection circuit for controlling a bending machine according to the present invention;

[0025] Figure 2 A circuit for controlling a two-handed and one-foot protection circuit for a bending machine according to the present invention Figure 1 ;

[0026] Figure 3 A circuit for controlling a two-handed and one-foot protection circuit for a bending machine according to the present invention Figure 2 .

[0027] The numbers in the figure represent:

[0028] 1. Power module; 2. Selection switch; 3. Foot control module; 4. Two-hand control module; 41. First branch; 42. Second branch; 43. Third branch; 5. Input module. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: In some embodiments, please refer to the drawings of the specification Figure 1-Figure 3 , a two-handed single-foot protection circuit for bending machine control, comprising a power module 1, the power module 1 is connected to a selection switch 2, the selection switch 2 is connected to a foot control module 3 and a two-handed control module 4, the foot control module 3 and the two-handed control module 4 are both connected to an input module 5;

[0031] The two-hand control module 4 includes a first branch 41, a second branch 42 and a third branch 43, wherein the first branch 41, the second branch 42 and the third branch 43 are all connected to the selection switch 2, the first branch 41 is connected to the second branch 42 and the third branch 43, and the second branch 42 is connected to the third branch 43;

[0032] The third branch 43 is connected to the input module 5; the input module 5 is connected to the system IO input port.

[0033] When the present invention is in use, when the slide plate is controlled to move downward by the two-hand buttons, the power module 1 first turns on the first branch 41 and the second branch 42 through the selection switch 2, and the third branch 43 is powered. After the third branch 43 is powered, the downward command channel of the input module 5 is turned on, and the slide plate downward command is sent to the bending machine control system;

[0034] When the slide plate is controlled to move downward by the foot pedal, the power module 1 turns on the foot pedal control module 3 through the selection switch 2. After the foot pedal control module 3 is turned on and energized, the downward command channel of the input module 5 is turned on, and the slide plate downward command is sent to the bending machine control system;

[0035] When controlling the slide plate to move upward, the input module 5 is directly controlled to send a slide plate upward command to the system.

[0036] The present invention adds two-hand protection to the pedal control unit of the bending machine, and starts the machine by both hands, thus preventing the two hands from being hurt by the bending machine and effectively ensuring personal safety.

[0037] Embodiment 2: In some embodiments, Figure 2 and Figure 3 As shown, as a preferred embodiment of the present invention, the selection switch 2 is a switch SA1; one end of the switch SA1 is connected to the positive pole of the power module 1, and the other end of the switch SA1 is connected to both the foot control module 3 and the two-hand control module 4.

[0038] The switch SA1 is a key switch, which can be turned only when a key is inserted, so as to select the function of both hands and one foot.

[0039] The first branch 41 includes a button SB6, normally closed contacts 55-56 of a KA29 relay, normally open contacts 13-14 of a KA30 relay and a KA30 relay coil; one end of the button SB6 is connected to the normally closed contacts 55-56 of the KA29 relay and the normally open contacts 13-14 of the KA30 relay, and the other ends of the normally closed contacts 55-56 of the KA29 relay and the normally open contacts 13-14 of the KA30 relay are connected to the KA30 relay coil.

[0040] The second branch 42 includes a button SB7, normally closed contacts 55-56 of the KA30 relay, normally open contacts 13-14 of the KA29 relay and a KA29 relay coil; one end of the button SB7 is connected to the normally closed contacts 55-56 of the KA30 relay and the normally open contacts 13-14 of the KA29 relay, and the other ends of the normally closed contacts 55-56 of the KA30 relay and the normally open contacts 13-14 of the KA29 relay are connected to the KA29 relay coil.

[0041] The third branch 43 includes the normally open contacts 43-44 of the KA29 relay, the normally open contacts 43-44 of the KA30 relay, the KA31 relay coil and the diode; one end of the normally open contacts 43-44 of the KA29 relay is connected to one end of the normally open contacts 43-44 of the KA30 relay, the other end of the normally open contacts 43-44 of the KA30 relay is connected to one end of the KA31 relay coil, and both ends of the KA31 relay coil are connected in parallel with the diode.

[0042] The other end of the switch SA1 is connected to the other end of the button SB6, the other end of the button SB7, and the other end of the normally open contacts 43-44 of the KA29 relay.

[0043] The other end of the KA29 relay coil, the other end of the KA30 relay coil, and the other end of the KA31 relay coil are all connected to the negative pole of the power module 1.

[0044] The foot control module 3 includes a down pedal SF1, one end of the down pedal SF1 is connected to the other end of the selection switch 2, and the other end of the down pedal SF1 is connected to one end of the KA31 relay coil.

[0045] The input module 5 includes the normally open contacts 11-14 of the KA31 relay and the upward pedal SF2. One end of the normally open contacts 11-14 of the KA31 relay is connected to the power module 1, and the other end of the normally open contacts 11-14 of the KA31 relay is connected to the bending machine control system. One end of the upward pedal SF2 is connected to the power module 1, and the other end of the pedal SF2 is connected to the bending machine control system.

[0046] In the two-hand operation mode, both buttons need to be pressed simultaneously, and the interval time cannot exceed the setting time of the relay delay contact. Otherwise, the KA31 relay will not be energized, all the normally open contacts of KA31 will remain normally open, the system IO will not receive the input down signal, and the machine tool will not be able to move down.

[0047] The first method is to control the slide up and down by the two-hand start button, selector switch 2 is rotated to the two-hand operation position by the key, line number 160 is energized, line number 167 is de-energized, button SB6 is pressed, the coil of KA29 relay is not energized, the delayed normally closed contacts 55-56 of KA29 relay are in the normally closed state, line number 164 is energized, the coil of KA30 relay is energized, the normally open contacts 13-14 of KA30 relay and the normally open contacts 43-44 of KA30 relay are all changed to normally closed, line numbers 162, 164 The KA30 relay coil is energized, and the delayed normally closed contacts 55-56 of the KA30 relay are in a normally closed state within the delay interval. The delayed normally closed contacts are disconnected when the set time is exceeded. The line number 163 is energized, and the KA29 relay coil is energized. The normally open contacts 13-14 and 43-44 of the KA29 relay all become normally closed. The line numbers 161 and 163 are turned on, and the KA29 relay coil is energized.

[0048] Up to now, the coils of KA29 relay and KA30 relay are energized, the normally open contacts 43-44 of KA29 relay and 43-44 of KA30 relay are closed, line numbers 160-166 are turned on, the coil of KA31 relay is energized, the normally open contacts 11-14 of KA31 relay line are closed, the system IO downward signal is input, and the machine tool slide is controlled downward by the two-hand buttons.

[0049] The second method is to control the slide to move downward by the downward pedal SF1. The selector switch 2 is turned to the single-foot downward mode by the key, that is, line number 160 loses power, line number 167 is energized, the downward pedal SF1 is stepped on, line number 166 is energized, the KA31 relay coil is energized, the normally open contacts 11-14 of the KA31 relay are closed, line number 141 is energized, the system IO downward signal is input, and the machine tool slide is controlled to move downward by the foot pedal;

[0050] The upward signal of the machine tool slide is only controlled by the up and down pedals SF2 and has nothing to do with the two modes. As long as the upward pedal SF2 is pressed, line number 142 is energized, the system IO upward signal is input, and the machine tool slide moves upward.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-handed single-foot protection circuit for controlling a bending machine, comprising a power module (1), characterized in that: The power module (1) is connected to a selection switch (2), the selection switch (2) is connected to a foot control module (3) and a two-hand control module (4), and the foot control module (3) and the two-hand control module (4) are both connected to an input module (5); The two-hand control module (4) comprises a first branch (41), a second branch (42) and a third branch (43); the first branch (41), the second branch (42) and the third branch (43) are all connected to the selection switch (2); the first branch (41) is connected to the second branch (42) and the third branch (43); and the second branch (42) is connected to the third branch (43); The third branch (43) is connected to the input module (5); the input module (5) is connected to the system IO input port.

2. The two-handed single-foot protection circuit for bending machine control according to claim 1 is characterized in that: The selection switch (2) is a switch (SA1); one end of the switch (SA1) is connected to the positive pole of the power module (1), and the other end of the switch (SA1) is connected to both the foot control module (3) and the two-hand control module (4).

3. The two-handed single-foot protection circuit for controlling a bending machine according to claim 2 is characterized in that: The first branch (41) includes a button (SB6), a normally closed contact (55-56) of a (KA29) relay, a normally open contact (13-14) of a (KA30) relay, and a (KA30) relay coil; one end of the button (SB6) is connected to the normally closed contact (55-56) of the (KA29) relay and the normally open contact (13-14) of the (KA30) relay, and the other ends of the normally closed contact (55-56) of the (KA29) relay and the normally open contact (13-14) of the (KA30) relay are connected to the KA30 relay coil.

4. The two-handed single-foot protection circuit for controlling a bending machine according to claim 3 is characterized in that: The second branch (42) includes a button (SB7), a normally closed contact (55-56) of a (KA30) relay, a normally open contact (13-14) of a KA29 relay, and a (KA29) relay coil; one end of the button (SB7) is connected to the normally closed contact (55-56) of the KA30 relay and the normally open contact (13-14) of the (KA29) relay, and the other ends of the normally closed contact (55-56) of the (KA30) relay and the normally open contact (13-14) of the (KA29) relay are connected to the (KA29) relay coil.

5. The two-hand and one-foot protection circuit for controlling a bending machine according to claim 4 is characterized in that: The third branch (43) includes a normally open contact (43-44) of a (KA29) relay, a normally open contact (43-44) of a (KA30) relay, a (KA31) relay coil and a diode; one end of the normally open contact (43-44) of the (KA29) relay is connected to one end of the normally open contact (43-44) of the (KA30) relay, the other end of the normally open contact (43-44) of the (KA30) relay is connected to one end of the (KA31) relay coil, and both ends of the (KA31) relay coil are connected in parallel with the diode.

6. The two-handed single-foot protection circuit for controlling a bending machine according to claim 5 is characterized in that: The other end of the switch (SA1) is connected to the other end of the button (SB6), the other end of the button (SB7), and the other end of the normally open contact (43-44) of the (KA29) relay.

7. The two-handed single-foot protection circuit for controlling a bending machine according to claim 6 is characterized in that: The other end of the (KA29) relay coil, the other end of the (KA30) relay coil, and the other end of the (KA31) relay coil are all connected to the negative pole of the power module (1).

8. The two-handed single-foot protection circuit for controlling a bending machine according to claim 7 is characterized in that: The foot control module (3) comprises a downward pedal (SF1), one end of the downward pedal (SF1) is connected to the other end of the selection switch (2), and the other end of the downward pedal (SF1) is connected to one end of a (KA31) relay coil.

9. The two-handed single-foot protection circuit for controlling a bending machine according to claim 8 is characterized in that: The input module (5) comprises a normally open contact (11-14) of a (KA31) relay and an upward pedal (SF2), one end of the normally open contact (11-14) of the (KA31) relay is connected to the power module (1), and the other end of the normally open contact (11-14) of the (KA31) relay is connected to the IO input of the bending machine control system, one end of the upward pedal (SF2) is connected to the power module (1), and the other end of the pedal (SF2) is connected to the IO input of the bending machine control system.

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