CN202399562U - Safety protection hydraulic system for fine blanking die of fine blanking press - Google Patents

Safety protection hydraulic system for fine blanking die of fine blanking press Download PDF

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Publication number
CN202399562U
CN202399562U CN 201120511223 CN201120511223U CN202399562U CN 202399562 U CN202399562 U CN 202399562U CN 201120511223 CN201120511223 CN 201120511223 CN 201120511223 U CN201120511223 U CN 201120511223U CN 202399562 U CN202399562 U CN 202399562U
Authority
CN
China
Prior art keywords
valve
fine blanking
oil
hydraulic fluid
fluid port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 201120511223
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Chinese (zh)
Inventor
田世领
端武治
王伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangzhou Forging Machine Tool Co Ltd
Original Assignee
Yangzhou Forging Machine Tool Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yangzhou Forging Machine Tool Co Ltd filed Critical Yangzhou Forging Machine Tool Co Ltd
Priority to CN 201120511223 priority Critical patent/CN202399562U/en
Application granted granted Critical
Publication of CN202399562U publication Critical patent/CN202399562U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a safety protection hydraulic system for a fine blanking die of a fine blanking press in the field of the press, which comprises a main oil cylinder and an oil pump. A protection oil cylinder is arranged at the upper end of a piston rod of the main oil cylinder; one path of a bypass of an outlet of the oil pump is conducted with a T oil port of a two-position four-way electromagnetic valve by a pressure reducing valve and a first check valve, the other path of the bypass of the outlet of the oil pump is conducted with a P oil port of the two-position four-way electromagnetic valve by a second check valve, a B oil port of the two-position four-way electromagnetic valve is blocked off and an A oil port of the two-position four-way electromagnetic valve is conducted with the protection oil cylinder; a bypass branch circuit is arranged between a valve rear passage of the first check valve and the T oil port of the two-position four-way electromagnetic valve and is used for conducting a pressure gauge with an inlet of an adjustable overflow valve; and an outlet of the adjustable overflow valve is conducted with an oil tank. According to the utility model, foreign materials between the dies can be timely detected, so that the safety of the fine blanking die is protected and the die more reliably works and has low fault rate and long service life.

Description

A kind of fine blanking press fine blanking die safeguard protection hydraulic system
Technical field
The utility model relates to a kind of forcing press, particularly a kind of protective device of forcing press fine blanking die.
Background technology
In the prior art, the smart forcing press that dashes processing generally all is to change a social system with the conventional oil press, and its slide block is arranged on the piston rod end of master cylinder; Mould is arranged on slide block and the workbench, can change running speed of sliding block through oil inlet quantity, drives the courses of work such as mould matched moulds, die sinking, slide block lifting; Existing forcing press has increased position switch, through corresponding circuit controlled pressure machine stroke for the protection mould between slide block road and support; With damages that can not be stamped of protection mould, still, owing to the precision of position switch is lower; This way is difficult to play protective effect in fact to fine blanking die, and when especially having foreign matter between the mould, position switch is not action as yet; And mould has been squeezed, and like this, is easy to mold damage.
The utility model content
For overcoming the defective of prior art, the utility model provides a kind of fine blanking press fine blanking die safeguard protection hydraulic system, it can in time be detected have foreign matter between the mould, the safety of protection fine blanking die.
The purpose of the utility model is achieved in that a kind of fine blanking press fine blanking die safeguard protection hydraulic system, comprises master cylinder and oil pump, and the piston rod upper end of said master cylinder is provided with the protection oil cylinder; Said oil pump outlet bypass No. one pressure-reducing valve, first check valve are connected the T hydraulic fluid port of two-position four-way solenoid valve; Another road second check valve is connected the P hydraulic fluid port of two-position four-way solenoid valve; The B hydraulic fluid port of two-position four-way solenoid valve blocks, and the A hydraulic fluid port of two-position four-way solenoid valve is connected said protection oil cylinder; Between the T hydraulic fluid port of passage and two-position four-way solenoid valve behind the valve of said first check valve, be provided with the import of bypass branch road cut-in pressure table and adjustable relief valve, fuel tank is connected in the outlet of adjustable relief valve.
In the utility model, when needing to promote slide block, the P hydraulic fluid port of two-position four-way solenoid valve and A hydraulic fluid port are connected, and T hydraulic fluid port and B hydraulic fluid port are connected simultaneously, and the oil-feed of protection oil cylinder can realize that slide block promotes; Adjust when suitable when oil pressure, can support slide block, master cylinder and mould motion just, this oil pressure can be adjusted through adjustable relief valve; And when punch process, the two-position four-way solenoid valve action, T hydraulic fluid port and A hydraulic fluid port are connected; B hydraulic fluid port and P hydraulic fluid port are connected, and working connection system drive slide block is descending and then descending at a slow speed fast earlier, and slide block is from fast before changing at a slow speed; The patrix of mould should not touch workpiece, could protect mould like this; If there is foreign matter between the mould, in soon at a slow speed before the conversion of slide block movement, can build-up of pressure the pressure of table raise, can know according to this abnormal signal to have foreign matter between the mould, and then notice control system sends halt instruction.Compared with prior art, the utility model can in time detect and have foreign matter between the mould, and the safety of protection fine blanking die makes mold work more reliable, and spoilage is low, long service life.
Description of drawings
Fig. 1 is the utility model fundamental diagram.
Wherein, 1 pressure-reducing valve, 2 first check valves, 3 overflow valves, 4 Pressure gauges, 5 two-position four-way solenoid valves, 6 second check valves, 7 master cylinders, 8 protection oil cylinders, 9 piston rods.
The specific embodiment
As shown in the figure, for a kind of fine blanking press fine blanking die safeguard protection hydraulic system, comprise master cylinder 7 and oil pump, piston rod 9 upper ends of said master cylinder 7 are provided with protection oil cylinder 8; Said oil pump outlet bypass No. one pressure-reducing valve 1, first check valve 2 are connected the T hydraulic fluid port of two-position four-way solenoid valves 5; Another road second check valve 6 is connected the P hydraulic fluid port of two-position four-way solenoid valve 5; The B hydraulic fluid port of two-position four-way solenoid valve 5 blocks, and the A hydraulic fluid port of two-position four-way solenoid valve 5 is connected said protection oil cylinder 8; Between the T hydraulic fluid port of passage behind the valve of said first check valve 2 and two-position four-way solenoid valve 5, be provided with the import of bypass branch road cut-in pressure table and adjustable relief valve 3, fuel tank is connected in the outlet of adjustable relief valve 3.
When needs promoted slide block, the P hydraulic fluid port of two-position four-way solenoid valve 5 and A hydraulic fluid port were connected, and T hydraulic fluid port and B hydraulic fluid port are connected simultaneously, and 8 oil-feeds of protection oil cylinder can realize that slide block promotes; Adjust when suitable when oil pressure, can support slide block, master cylinder 7 and mould motion just, this oil pressure can be adjusted through adjustable relief valve 3; And when punch process, two-position four-way solenoid valve 5 actions, T hydraulic fluid port and A hydraulic fluid port are connected; B hydraulic fluid port and P hydraulic fluid port are connected, and working connection system drive slide block is descending and then descending at a slow speed fast earlier, and slide block is from fast before changing at a slow speed; The patrix of mould should not touch workpiece, could protect mould like this; If there is foreign matter between the mould, in soon at a slow speed before the conversion of slide block movement, can build-up of pressure the pressure of table raise, can know according to this abnormal signal to have foreign matter between the mould, and then notice control system sends halt instruction.
To different fine blanking die setting pressures, establishing method is: with two-position four-way solenoid valve 5 energisings, magnetic valve switching-over; P hydraulic fluid port and B hydraulic fluid port are logical; A hydraulic fluid port and T hydraulic fluid port are logical, and safe oil cylinder and pressure pressure table, adjustable relief valve 3 are connected and led at this moment, and adjustment adjustable relief valve 3 opens the size of valve; Observe the minimum pressure values of safe oil cylinder picking-up slide block and mold weight, increase a bit just passable more a little.
The utility model is not limited to the foregoing description; On the basis of the disclosed technical scheme of the utility model; Those skilled in the art is according to disclosed technology contents; Do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the protection domain of the utility model.

Claims (1)

1. a fine blanking press fine blanking die safeguard protection hydraulic system comprises master cylinder and oil pump, it is characterized in that: the piston rod upper end of said master cylinder is provided with the protection oil cylinder; Said oil pump outlet bypass No. one pressure-reducing valve, first check valve are connected the T hydraulic fluid port of two-position four-way solenoid valve; Another road second check valve is connected the P hydraulic fluid port of two-position four-way solenoid valve; The B hydraulic fluid port of two-position four-way solenoid valve blocks, and the A hydraulic fluid port of two-position four-way solenoid valve is connected said protection oil cylinder; Between the T hydraulic fluid port of passage and two-position four-way solenoid valve behind the valve of said first check valve, be provided with the import of bypass branch road cut-in pressure table and adjustable relief valve, fuel tank is connected in the outlet of adjustable relief valve.
CN 201120511223 2011-12-09 2011-12-09 Safety protection hydraulic system for fine blanking die of fine blanking press Expired - Lifetime CN202399562U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120511223 CN202399562U (en) 2011-12-09 2011-12-09 Safety protection hydraulic system for fine blanking die of fine blanking press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120511223 CN202399562U (en) 2011-12-09 2011-12-09 Safety protection hydraulic system for fine blanking die of fine blanking press

Publications (1)

Publication Number Publication Date
CN202399562U true CN202399562U (en) 2012-08-29

Family

ID=46697236

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120511223 Expired - Lifetime CN202399562U (en) 2011-12-09 2011-12-09 Safety protection hydraulic system for fine blanking die of fine blanking press

Country Status (1)

Country Link
CN (1) CN202399562U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103112196A (en) * 2013-03-08 2013-05-22 严培义 Powder pressing machine pressure-protection device
CN104353721A (en) * 2013-06-28 2015-02-18 吴红平 Stamping die with safety protection function
CN106003785A (en) * 2016-05-30 2016-10-12 湖州机床厂有限公司 Fine blanking hydraulic press and fine blanking hydraulic press control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103112196A (en) * 2013-03-08 2013-05-22 严培义 Powder pressing machine pressure-protection device
CN104353721A (en) * 2013-06-28 2015-02-18 吴红平 Stamping die with safety protection function
CN104353721B (en) * 2013-06-28 2016-08-24 中山市广瑞达精密模具制造有限公司 There is the blanking die of safety protection function
CN106003785A (en) * 2016-05-30 2016-10-12 湖州机床厂有限公司 Fine blanking hydraulic press and fine blanking hydraulic press control method

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Granted publication date: 20120829