CN108481409B - Human body protection system applied to hydraulic cutting machine - Google Patents
Human body protection system applied to hydraulic cutting machine Download PDFInfo
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- CN108481409B CN108481409B CN201810657943.XA CN201810657943A CN108481409B CN 108481409 B CN108481409 B CN 108481409B CN 201810657943 A CN201810657943 A CN 201810657943A CN 108481409 B CN108481409 B CN 108481409B
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- travel switch
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- 230000000670 limiting effect Effects 0.000 claims abstract description 116
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000009471 action Effects 0.000 claims abstract description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/22—Safety devices specially adapted for cutting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Shearing Machines (AREA)
Abstract
The invention provides a human body protection system applied to a hydraulic cutting machine, which comprises the hydraulic cutting machine, a limiting mechanism and a light curtain reminding mechanism; the limiting mechanism comprises a left limiting protection cylinder, a left limiting block, a left limiting protection travel switch, a left limiting protection relay, a right limiting protection cylinder, a right limiting block, a right limiting protection travel switch and a right limiting protection relay, wherein the action ends of cylinder rods of the left limiting protection cylinder and the right limiting protection cylinder are respectively provided with the left limiting block and the right limiting block, and contacts of the left limiting protection travel switch and the right limiting protection travel switch are respectively arranged on action paths of the left limiting block and the right limiting block; according to the invention, the upper moving plate is limited by the left limiting block and the right limiting block before an operator presses the left control button and the right control button to enable the upper moving plate to fall down, so that safety accidents caused by sudden falling of the hydraulic cutting machine due to faults are prevented.
Description
Technical Field
The invention relates to the field of hydraulic cutting machines, in particular to a human body protection system applied to a hydraulic cutting machine.
Background
Hydraulic cutting machines are one of the common tools in the die cutting industry.
As shown in fig. 1: the mechanical structure of the hydraulic cutting machine mainly comprises a frame 1, a left cutting hydraulic cylinder 2, a right cutting hydraulic cylinder 3, an upper movable plate 4, an upper die holder 5 and a lower die holder 6; the lower die holder 6 is arranged on the frame 1, and the lower die holder 6 is used for placing an object to be processed; the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are respectively arranged at two sides of the frame 1, and the action ends of the hydraulic rods of the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are respectively fixedly connected with two ends of the upper moving plate 4, namely the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are used for driving the upper moving plate 4 to reciprocate up and down; the upper die holder 5 is fixedly provided on the lower surface of the upper movable plate 4, and a cutter 7 (punch) for cutting the workpiece 8 to be processed is provided on the upper die holder 5.
As shown in fig. 2: with the development of integrated circuits and automation control, the control circuits of hydraulic cutting machines are also continuously enriched, and can be generally simplified into the following control circuits: the control circuit of the hydraulic cutting machine comprises a power supply module, a left control relay KA1, a right control relay KA2, a left control button SB1, a right control button SB2 and an emergency stop button S1; the power supply module supplies power for the left control relay KA1, the right control relay KA2, the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3; the coil KA1 and the left control button SB1 of the left control relay are connected in series to form a left cutting hydraulic cylinder 2 control circuit, the normally open contact KA1-1 and the left cutting hydraulic cylinder 2 of the left control relay KA1 are connected in series to form a left cutting hydraulic cylinder 2 power supply circuit, the coil KA2 and the right control button SB2 of the right control relay are connected in series to form a right cutting hydraulic cylinder 3 control circuit, and the normally open contact KA2-1 and the right cutting hydraulic cylinder 3 of the right control relay KA2 are connected in series to form a right cutting hydraulic cylinder 3 power supply circuit.
When a worker presses the left control button SB1 and the right control button SB2 simultaneously, the coils KA2 of the left control relay KA1 and the right control relay KA2 are electrified, normally open contacts KA2-1 of the left control relay KA1 and the right control relay KA2 are closed, the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are electrified, and meanwhile the upper moving plate 4 is driven to move downwards, the upper die holder 5 is pressed downwards under the action of the upper moving plate 4, and the processed object placed on the lower die holder 6 is cut; if special conditions exist, the scram button S1 can be pressed, and the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are powered off and reset.
However, in the above-described process, if the hydraulic cutting machine fails, for example, if the hydraulic solenoid valve or the hydraulic cylinder leaks, the upper moving plate 4 suddenly drops, and the sudden stop button S1 is not controlled, a safety accident is easily caused.
Disclosure of Invention
The invention aims to provide a human body protection system applied to a hydraulic cutting machine, which can prevent the hydraulic cutting machine from suddenly falling down when the hydraulic cutting machine fails, thereby preventing safety accidents.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a human body protection system applied to a hydraulic cutting machine comprises the hydraulic cutting machine and a limiting mechanism; the limiting mechanism comprises a left limiting protection cylinder, a left limiting block, a left limiting protection travel switch, a left limiting protection relay, a right limiting protection cylinder, a right limiting protection travel switch and a right limiting protection relay, wherein the left limiting protection cylinder and the right limiting protection cylinder are arranged between an upper moving plate and a frame, the action ends of cylinder rods of the left limiting protection cylinder and the right limiting protection cylinder are respectively provided with the left limiting block and the right limiting block, when the cylinder rods of the left limiting protection cylinder and the right limiting protection cylinder extend out of a limiting position, the left limiting block and the right limiting block are positioned between an upper die holder and a lower die holder, contacts of the left limiting protection travel switch and the right limiting protection travel switch are respectively arranged on action paths of the left limiting block and the right limiting block, and when the left limiting block and the right limiting block shrink to the limiting position, the left limiting protection travel switch and the right limiting protection travel switch are closed;
the coil of the left limit protection relay is connected in series with the left cutting hydraulic cylinder control circuit, the normally open contact of the left limit protection relay, the power module and the left limit protection cylinder are connected in series to form a left limit cylinder protection circuit, and the left limit protection travel switch is connected in series with the left cutting hydraulic cylinder power supply circuit; the coil of the right limit protection relay is connected in series on the right cutting hydraulic cylinder control circuit, and the normally open contact of the right limit protection relay, the power module and the right limit protection cylinder are connected in series to form a right limit cylinder protection circuit, and the right limit protection travel switch is connected in series on the right cutting hydraulic cylinder control circuit.
The device also comprises a light curtain reminding mechanism; the light curtain reminding mechanism comprises a central processing unit, a light curtain and a reminding relay, wherein a light curtain transmitting end and a light curtain receiving end are respectively and correspondingly arranged on two sides of the frame and are arranged at the position of a feed inlet of the hydraulic cutting machine; the input end of the light curtain transmitting end is connected with the output end of the central processing unit, the output end of the light curtain receiving end is connected with the input end of the central processing unit, the coil of the reminding relay is connected with the output end of the central processing unit through the relay control circuit, and the two pairs of normally closed contacts of the reminding relay are respectively connected in series on the left cutting hydraulic cylinder power supply circuit and the right cutting hydraulic cylinder power supply circuit.
The light curtain adopts a safe four-stage light curtain.
The central processing unit adopts an industrial personal computer.
The invention has the beneficial effects that:
the human body protection system for the hydraulic cutting machine provided by the invention has the advantages that the upper moving plate is limited by the left limiting block and the right limiting block before an operator presses the left control button and the right control button to enable the upper moving plate to fall down by utilizing the limiting mechanism, so that safety accidents caused by sudden falling of the hydraulic cutting machine due to faults are prevented; meanwhile, the invention also utilizes the light curtain reminding mechanism to monitor whether the feed inlet of the hydraulic cutting machine is touched by the limbs of an operator or not in real time, thereby avoiding the occurrence of safety accidents.
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 diagram of a hydraulic cutting machine;
FIG. 2 is a schematic diagram of a control circuit of the hydraulic cutting machine;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is a schematic diagram of a control circuit according to the present invention;
fig. 5 is a schematic diagram of a control circuit of the light curtain reminding mechanism according to the invention.
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.
The invention relates to a human body protection system applied to a hydraulic cutting machine, which comprises the hydraulic cutting machine, as shown in fig. 1: the mechanical structure of the hydraulic cutting machine mainly comprises a frame 1, a left cutting hydraulic cylinder 2, a right cutting hydraulic cylinder 3, an upper movable plate 4, an upper die holder 5 and a lower die holder 6; the lower die holder 6 is arranged on the frame 1, and the lower die holder 6 is used for placing a workpiece 8 to be processed; the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are respectively arranged at two sides of the frame 1, and the action ends of the hydraulic rods of the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are respectively fixedly connected with two ends of the upper moving plate 4, namely the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are used for driving the upper moving plate 4 to reciprocate up and down; the upper die holder 5 is fixedly provided on the lower surface of the upper movable plate 4, and a cutter 7 (punch) for cutting the workpiece 8 to be processed is provided on the upper die holder 5.
As shown in fig. 2: the control circuit of the hydraulic cutting machine comprises a power supply module, a left control relay, a right control relay, a left control button SB1, a right control button SB2 and an emergency stop button S1; the power supply module supplies power for the left control relay, the right control relay, the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3; the coil KA1 and the left control button SB1 of the left control relay are connected in series to form a left cutting hydraulic cylinder 2 control circuit, the normally open contact KA1-1 and the left cutting hydraulic cylinder 2 of the left control relay are connected in series to form a left cutting hydraulic cylinder 2 power supply circuit, the coil KA2 and the right control button SB2 of the right control relay are connected in series to form a right cutting hydraulic cylinder 3 control circuit, and the normally open contact KA2-1 and the right cutting hydraulic cylinder 3 of the right control relay are connected in series to form a right cutting hydraulic cylinder 3 power supply circuit.
As shown in fig. 3: in order to prevent the hydraulic cutting machine from suddenly falling when the hydraulic cutting machine fails, the human body protection system applied to the hydraulic cutting machine further comprises a limiting mechanism; the limiting mechanism comprises a left limiting protection cylinder 9, a left limiting block, a left limiting protection travel switch 10, a left limiting protection relay, a right limiting protection cylinder 12, a right limiting block, a right limiting protection travel switch 13 and a right limiting protection relay, wherein the left limiting protection cylinder 9 and the right limiting protection cylinder 12 are arranged between the upper moving plate 4 and the frame 1, the action ends of cylinder rods of the left limiting protection cylinder 9 and the right limiting protection cylinder 12 are respectively provided with the left limiting block and the right limiting block, when the cylinder rods of the left limiting protection cylinder 9 and the right limiting protection cylinder 12 extend to the limit positions, the left limiting block and the right limiting block are positioned between the upper die holder 5 and the lower die holder 6, contacts of the left limiting protection travel switch 10 and the right limiting protection travel switch 13 are respectively arranged on action paths of the left limiting block and the right limiting protection travel switch 13, and when the left limiting block and the right limiting block shrink to the limit positions, the left limiting protection travel switch 10 and the right limiting protection travel switch 13 are closed;
as shown in fig. 4: the coil KA3 of the left limit protection relay is connected in series on the control circuit of the left cutting hydraulic cylinder 2, the normally open contact KA3-1 of the left limit protection relay, the power module and the left limit protection cylinder 9 are connected in series to form a left limit cylinder protection circuit, and the left limit protection travel switch 10 is connected in series on the power supply circuit of the left cutting hydraulic cylinder 2; the coil KA4 of the right limit protection relay is connected in series on the control circuit of the right cutting hydraulic cylinder 3, the normally open contact KA4-1 of the right limit protection relay, the power module and the right limit protection cylinder 12 are connected in series to form a right limit cylinder protection circuit, and the right limit protection travel switch 13 is connected in series on the control circuit of the right cutting hydraulic cylinder 3.
The human body protection system applied to the hydraulic cutting machine further comprises a light curtain reminding mechanism; the light curtain reminding mechanism comprises a central processing unit, a light curtain and a reminding relay, wherein the light curtain adopts a safe four-level light curtain; the light curtain transmitting end 11 and the light curtain receiving end 14 are respectively and correspondingly arranged at two sides of the frame 1 and are arranged at the position of a feed inlet of the hydraulic cutting machine; as shown in fig. 5: the input end of the light curtain transmitting end is connected with the output end of the central processing unit, the output end of the light curtain receiving end is connected with the input end of the central processing unit, the coil of the reminding relay is connected with the output end of the central processing unit through the relay control circuit, and two pairs of normally closed contacts S2 of the reminding relay are respectively connected in series on the power supply circuit of the left cutting hydraulic cylinder 2 and the power supply circuit of the right cutting hydraulic cylinder 3.
The central processing unit adopts an industrial personal computer.
The invention relates to a human body protection system applied to a hydraulic cutting machine, which comprises the following steps:
the processed workpiece 8 is fed between an upper die holder 5 and a lower die holder 6 through a feed inlet of a hydraulic cutting machine, and a left control button SB1 and a right control button SB2 are pressed simultaneously, in the process, as a coil KA3 of a left limit protection relay is connected in series on a control circuit of a left cutting hydraulic cylinder 2, a normally open contact KA3-1 of the left limit protection relay, a power module and a left limit protection cylinder 9 are connected in series to form a left limit cylinder protection circuit; the coil KA4 of the right limit protection relay is connected in series with the control circuit of the right cutting hydraulic cylinder 3, and the normally open contact KA4-1 of the right limit protection relay, the power module and the right limit protection cylinder 12 are connected in series to form a right limit cylinder protection circuit; therefore, when the left control button SB1 and the right control button SB2 are pressed simultaneously, the coil KA3 of the left limit protection relay and the coil KA4 of the right limit protection relay are electrified simultaneously, the normally open contact KA3-1 of the left limit protection relay and the normally open contact KA4-1 of the right limit protection relay are closed simultaneously, and then the left limit cylinder protection circuit and the right limit cylinder protection circuit are electrified to act, the left limit protection cylinder 9 and the right limit protection cylinder 12 act, the left limit block and the right limit block retract under the driving of the cylinder rod to drive the contacts of the left limit protection travel switch 10 and the right limit protection travel switch 13 to act, and the left limit protection travel switch 10 and the right limit protection travel switch 13 are further closed; because the left limit protection travel switch 10 is connected in series on the power supply circuit of the left cutting hydraulic cylinder 2, and the right limit protection travel switch 13 is connected in series on the power supply circuit of the right cutting hydraulic cylinder 3, the power supply circuit of the left cutting hydraulic cylinder 2 and the power supply circuit of the right cutting hydraulic cylinder 3 are conducted because of the closing of the left limit protection travel switch 10 and the right limit protection travel switch 13, and then the left cutting hydraulic cylinder 2 and the right cutting hydraulic cylinder 3 are electrified to work, and the cutter 7 on the upper template is driven to cut the processed workpiece 8;
in the above process, when the operator sends the workpiece 8 to be processed into the hydraulic cutting machine, if the hydraulic electromagnetic valve or the hydraulic cylinder leaks, the upper moving plate 4 suddenly drops, and the emergency stop button S1 is pressed, at this time, the upper moving plate 4 is limited due to the limiting effect of the left limiting block and the right limiting block, so as to prevent safety accidents;
in the above process, the light curtain transmitting end 11 and the light curtain receiving end 14 form a reminding light path at the feed inlet of the hydraulic cutting machine, if an operator carelessly stretches limbs into the feed inlet, the central processing unit controls the coil of the reminding relay to be electrified through the relay control circuit, and the two pairs of normally closed contacts S2 of the reminding relay are disconnected, so that the power supply circuit of the left cutting hydraulic cylinder 2 and the power supply circuit of the right cutting hydraulic cylinder 3 are disconnected, and the safety accident caused by the falling of the upper moving plate 4 is prevented.
The human body protection system for the hydraulic cutting machine utilizes the limiting mechanism, and before an operator presses the left control button SB1 and the right control button SB2 to enable the upper moving plate 4 to fall, the left limiting block and the right limiting block limit the upper moving plate 4, so that safety accidents caused by sudden falling of the hydraulic cutting machine due to faults are prevented; meanwhile, the invention also utilizes the light curtain reminding mechanism to monitor whether the feed inlet of the hydraulic cutting machine is touched by the limbs of an operator or not in real time, thereby avoiding the occurrence of safety accidents.
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 (4)
1. Be applied to human protection system of hydraulic pressure cutting machine, including hydraulic pressure cutting machine, its characterized in that: the device also comprises a limiting mechanism; the limiting mechanism comprises a left limiting protection cylinder, a left limiting block, a left limiting protection travel switch, a left limiting protection relay, a right limiting protection cylinder, a right limiting protection travel switch and a right limiting protection relay, wherein the left limiting protection cylinder and the right limiting protection cylinder are arranged between an upper moving plate and a frame, the action ends of cylinder rods of the left limiting protection cylinder and the right limiting protection cylinder are respectively provided with the left limiting block and the right limiting block, when the cylinder rods of the left limiting protection cylinder and the right limiting protection cylinder extend out of a limiting position, the left limiting block and the right limiting block are positioned between an upper die holder and a lower die holder, contacts of the left limiting protection travel switch and the right limiting protection travel switch are respectively arranged on action paths of the left limiting block and the right limiting block, and when the left limiting block and the right limiting block shrink to the limiting position, the left limiting protection travel switch and the right limiting protection travel switch are closed;
the coil of the left limit protection relay is connected in series with the left cutting hydraulic cylinder control circuit, the normally open contact of the left limit protection relay, the power module and the left limit protection cylinder are connected in series to form a left limit cylinder protection circuit, and the left limit protection travel switch is connected in series with the left cutting hydraulic cylinder power supply circuit; the coil of the right limit protection relay is connected in series on the right cutting hydraulic cylinder control circuit, and the normally open contact of the right limit protection relay, the power module and the right limit protection cylinder are connected in series to form a right limit cylinder protection circuit, and the right limit protection travel switch is connected in series on the right cutting hydraulic cylinder control circuit.
2. A body protection system for a hydraulic cutting machine according to claim 1, wherein: the device also comprises a light curtain reminding mechanism; the light curtain reminding mechanism comprises a central processing unit, a light curtain and a reminding relay, wherein a light curtain transmitting end and a light curtain receiving end are respectively and correspondingly arranged on two sides of the frame and are arranged at the position of a feed inlet of the hydraulic cutting machine; the input end of the light curtain transmitting end is connected with the output end of the central processing unit, the output end of the light curtain receiving end is connected with the input end of the central processing unit, the coil of the reminding relay is connected with the output end of the central processing unit through the relay control circuit, and the two pairs of normally closed contacts of the reminding relay are respectively connected in series on the left cutting hydraulic cylinder power supply circuit and the right cutting hydraulic cylinder power supply circuit.
3. A body protection system for a hydraulic cutting machine according to claim 2, wherein: the light curtain adopts a safe four-stage light curtain.
4. A body protection system for a hydraulic cutting machine according to claim 2, wherein: the central processing unit adopts an industrial personal computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810657943.XA CN108481409B (en) | 2018-06-25 | 2018-06-25 | Human body protection system applied to hydraulic cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810657943.XA CN108481409B (en) | 2018-06-25 | 2018-06-25 | Human body protection system applied to hydraulic cutting machine |
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| Publication Number | Publication Date |
|---|---|
| CN108481409A CN108481409A (en) | 2018-09-04 |
| CN108481409B true CN108481409B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810657943.XA Active CN108481409B (en) | 2018-06-25 | 2018-06-25 | Human body protection system applied to hydraulic cutting machine |
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| CN (1) | CN108481409B (en) |
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| CN201348130Y (en) * | 2008-06-13 | 2009-11-18 | 哈尔滨理工大学 | High-reliability punch automatic protection device |
| CN103071737A (en) * | 2012-12-18 | 2013-05-01 | 江苏海德曼建材工业有限公司 | Safety device of punching machine |
| CN203955826U (en) * | 2014-07-07 | 2014-11-26 | 上海捷英途新材料科技有限公司 | Stamping machine |
| CN205165647U (en) * | 2015-10-25 | 2016-04-20 | 荣昌县粤兴不锈钢有限公司 | Automatic security stainless steel stamping device |
| CN207026362U (en) * | 2017-05-23 | 2018-02-23 | 淳华科技(昆山)有限公司 | punch safety protection device |
| CN208451748U (en) * | 2018-06-25 | 2019-02-01 | 郑州领胜科技有限公司 | A kind of protecting human body system applied to hydraulic cutter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20217426U1 (en) * | 2002-11-05 | 2003-01-16 | Pilz GmbH & Co., 73760 Ostfildern | Safety device for a machine, in particular for a bending press |
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2018
- 2018-06-25 CN CN201810657943.XA patent/CN108481409B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201348130Y (en) * | 2008-06-13 | 2009-11-18 | 哈尔滨理工大学 | High-reliability punch automatic protection device |
| CN103071737A (en) * | 2012-12-18 | 2013-05-01 | 江苏海德曼建材工业有限公司 | Safety device of punching machine |
| CN203955826U (en) * | 2014-07-07 | 2014-11-26 | 上海捷英途新材料科技有限公司 | Stamping machine |
| CN205165647U (en) * | 2015-10-25 | 2016-04-20 | 荣昌县粤兴不锈钢有限公司 | Automatic security stainless steel stamping device |
| CN207026362U (en) * | 2017-05-23 | 2018-02-23 | 淳华科技(昆山)有限公司 | punch safety protection device |
| CN208451748U (en) * | 2018-06-25 | 2019-02-01 | 郑州领胜科技有限公司 | A kind of protecting human body system applied to hydraulic cutter |
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| CN108481409A (en) | 2018-09-04 |
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