阅读说明：本技术 结点正置选点冲压控制方法及压力机 (Node righting point selection stamping control method and press ) 是由 彭卫彤 于 2020-12-23 设计创作，主要内容包括：本发明公开了一种结点正置选点冲压控制方法及压力机系统,其中结点正置选点冲压控制方法包括以下步骤：S1：滑块往下移动,使上模压向下模；S2：滑块在下止点上方完成冲压成型加工；S3：滑块继续往下滑动,下模跟随滑块滑动,直到滑块达到下止点；S4：滑块往上移动,下模回到施压点对应位置。本发明中的结点正置选点冲压控制方法和压力机可根据冲压加工需要的效果在上滑块下移的过程中选择施压点,施压点不限于下止点,满足不同的冲压工艺要求,适用性好。(The invention discloses a node positive position point selection stamping control method and a press machine system, wherein the node positive position point selection stamping control method comprises the following steps: s1: the slide block moves downwards to press the upper die to the lower die; s2: the slide block is punched and formed above the lower dead point; s3: the sliding block continues to slide downwards, and the lower die slides along with the sliding block until the sliding block reaches a lower dead point; s4: the slide block moves upwards, and the lower die returns to the position corresponding to the pressure point. The positive node point selection stamping control method and the press machine can select the pressing point in the process of moving the upper sliding block downwards according to the effect required by stamping processing, the pressing point is not limited to the lower dead point, different stamping process requirements are met, and the applicability is good.)

1. The positive node selection stamping control method is characterized by comprising the following steps of:

s1: the crank rotation module controls the crank to rotate, and the sliding block moves downwards to enable the upper die to press the lower die;

s2: the slide block is punched and formed above the lower dead point;

s3: the sliding block continues to slide downwards, and the follow-up module controls the lower die to slide along with the sliding block until the sliding block reaches a lower dead point;

s4: the slide block moves upwards, and the lower die returns to the position corresponding to the pressure point.

2. The press machine based on the node positive setting and point selecting stamping control method is characterized by comprising a rack (1), a crank (2), an upper sliding block (4), a deep drawing cylinder (8), a starting cylinder (9), a lower sliding block (10), a follow-up cylinder (11), a pressure-bearing cylinder (12), a timing cylinder (15) and a limiting conveyor belt (16), wherein the crank (2) is connected with the upper sliding block (4) through a connecting rod (3), the upper sliding block (4) is in sliding connection with an upper sliding rail (101) vertically arranged at the upper end of the rack (1), an upper die (6) is fixedly arranged at the lower end of the upper sliding block (4), the lower sliding block (10) is in sliding connection with a lower sliding rail (102) vertically arranged at the lower end of the rack (1), and a balance assembly (5) is arranged between the lower sliding block (10) and the upper sliding block (4) and the rack (1; a drawing cylinder (8) is fixedly arranged at the upper end of the lower sliding block (10), the lower end of the lower sliding block (10) is fixedly connected with a follow-up piston (111) in a follow-up cylinder (11), a follow-up liquid outlet pipe (114) of the follow-up cylinder (11) is communicated with a pressure-bearing liquid inlet pipe (121) of a pressure-bearing cylinder (12) through a starting valve (13), the upper space and the lower space of the follow-up piston (111) of the follow-up cylinder (11) are communicated through a return pipe (112), and an oil pump (113) is arranged on the return pipe (112);

the deep drawing cylinder (8) comprises an inner cylinder (81), an outer sleeve (82), a limiting plate (83) and a press plug (84), the upper end of the inner cylinder (81) is fixedly connected with a movable part in the lower die (7), the inner wall of the inner cylinder (81) is provided with the press plug (84), the lower end of the inner cylinder (81) is connected to the inner part of the outer sleeve (82) in a sliding sealing and sealing mode, and the limiting plate (83) is arranged below the inner cylinder (81) on the inner wall of the outer sleeve (82);

the starting cylinder (9) comprises a push plug (91), a push rod (92) and a return spring (93), the return spring (93) is arranged between the upper end of the push plug (91) and the starting cylinder (9), the lower end of the push rod (92) is fixedly connected with the push plug (91), the upper end of the push rod (92) pair extends out of the starting cylinder (9), and the lower space of a press plug (84) of the drawing cylinder (8) is communicated with the lower space of the push plug (91) of the starting cylinder (9) through a drawing liquid outlet pipe (85);

a timing cylinder (15) is arranged above the starting cylinder (9), a limiting conveyor belt (16) is arranged above the timing cylinder (15), an elastic membrane (151) corresponding to the push rod (92) in position is arranged on the lower surface of the timing cylinder (15), a connecting rod (152) is arranged at the upper end of the elastic membrane (151), the upper end of the connecting rod (152) extends out of the timing cylinder (15) and is provided with a time limiting magnetic block (153), and magnetic blocks (17) corresponding to the time limiting magnetic block (153) are uniformly arranged on the conveying surface of the limiting conveyor belt (16); the timing cylinder (15) is used for controlling the timing opening and closing of the starting valve (13).

3. Press according to claim 2, characterised in that the inside of the starting valve (13) is provided with a valve core (131) and a valve core return spring (132), the space on one side of the valve core (131) inside the starting valve (13) is communicated with the inner cavity of the timing cylinder (15) through a control oil pipe (14), and the return spring (132) is arranged between the other side of the valve core (131) and the inner wall of the starting valve (13);

the position of the spool (131) satisfies the following condition: when the oil in the timing cylinder (15) is filled in the space on one side of the valve core (131) in the starting valve (13), the through hole on the valve core (131) is communicated with the follow-up liquid outlet pipe (114) and the pressure-bearing liquid inlet pipe (121).

4. The press machine as claimed in claim 2, wherein the time-limited magnet block (153) is provided with a roller on the surface opposite to the magnetic block (17).

5. Press according to claim 4, characterized in that the magnetic attraction between the time-limited magnet block (153) and the magnet block (17) and the elastic force of the elastic membrane (151) satisfy the following conditions: when the roller of the time-limiting magnetic block (153) is in contact with the magnetic attraction block (17), the time-limiting magnetic block (153) and the magnetic attraction block (17) are mutually attracted, and the contact between the roller of the time-limiting magnetic block (153) and the magnetic attraction block (17) is kept;

when the roller of the time-limiting magnetic block (153) leaves the magnetic attraction block (17), the elastic force of the elastic film (151) pulls back the time-limiting magnetic block (153), and the elastic film (151) returns to the initial state.

6. Press according to claim 2, characterized in that a pressure-bearing piston (122) and a pressure-bearing spring (123) are arranged inside the pressure-bearing cylinder (12), the pressure-bearing spring (123) is arranged between the lower surface of the pressure-bearing piston (122) and the inner wall of the pressure-bearing cylinder (12), and the liquid inlet of the pressure-bearing liquid inlet pipe (121) is located above the pressure-bearing piston (122).

7. Press according to claim 2, characterized in that said balancing assembly (5) comprises a right cylinder (51) and a left cylinder (52), said right cylinder (51) internal piston left side being in communication with the left cylinder (52) internal piston right side, said right cylinder (51) internal piston right side being in communication with the left cylinder (52) internal piston left side.

Technical Field

The invention relates to the technical field of presses, in particular to a node positive position point selection stamping control method and a press.

Background

The crank-slider mechanism is a typical working mechanism of a crankshaft press, and the mechanism converts the rotary motion of a transmission system of the press into the reciprocating linear motion of a slider to realize various stamping processing technologies.

The crank-slider mechanism can be generally divided into two types of node positive position and node offset according to the arrangement characteristics of the motion mechanism, and the two different structural types are respectively applied to different presses due to different motion speed characteristics. The node biasing mechanism is mainly used for improving the stress state and the motion characteristic of the press machine, so that the process requirement is met. In a crank sliding block structure with positively offset nodes, a sliding block has a jerking characteristic and is often adopted in a horizontal forging machine; in the crank slider structure with the reversely offset nodes, the slider has a quick return characteristic, the working stroke speed is low, the return speed is high, the cold extrusion process is facilitated, and the crank slider structure is often adopted in a cold extruder. The node biasing mechanism keeps the pressing point of the bending press at a reasonable position of the slide stroke through node biasing, and keeps ideal stamping effect. The use limitation of the positive mechanism of the press node with the crank-slider structure is large, the pressure application point is positioned at the lower dead point, and the stamping effect is single.

Disclosure of Invention

The invention aims to provide a node righting point selection stamping control method and a press machine, aiming at solving the problems that in the prior art, a crank slide block structure press machine node righting mechanism is large in use limitation and single in stamping effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

the positive node selection stamping control method comprises the following steps:

s1: the crank rotation module controls the crank to rotate, and the sliding block moves downwards to enable the upper die to press the lower die;

s2: the slide block is punched and formed above the lower dead point;

s3: the sliding block continues to slide downwards, and the follow-up module controls the lower die to slide along with the sliding block until the sliding block reaches a lower dead point;

s4: the slide block moves upwards, and the lower die returns to the position corresponding to the pressure point.

The positive node point selection stamping control method can select the pressure application point in the process of moving the upper sliding block downwards according to the effect required by stamping processing, the pressure application point is not limited to the lower dead point, different stamping process requirements are met, and the applicability is good.

The invention also discloses a press machine based on the node positive position point selection stamping control method, which comprises a frame, wherein the frame is provided with a crank, an upper slide block, a deep drawing cylinder, a starting cylinder, a lower slide block, a follow-up cylinder, a pressure bearing cylinder, a timing cylinder and a limiting conveyor belt. The crank is connected with the frame in a rotating mode, the crank is connected with the upper sliding block through the connecting rod, the connecting rod is respectively hinged with the crank and the upper sliding block, the upper sliding block is connected with an upper sliding rail in a sliding mode, the upper end of the frame is vertically arranged, the lower end of the upper sliding block is fixedly arranged with the upper die, the crank rotating module in the press machine system can drive the crank to rotate, the crank can drive the upper sliding block to slide in the vertical direction, and the upper die is pressed to the lower die of the.

Furthermore, the deep cylinder, the starting cylinder, the lower sliding block, the follow-up cylinder, the pressure bearing cylinder, the timing cylinder and the limiting conveyor belt belong to a follow-up module. Specifically, lower slide rail sliding connection of the vertical setting of lower slider and frame lower extreme, the fixed deep-drawing jar that sets up in upper end of lower slider, the deep-drawing jar includes inner tube, overcoat, limiting plate and tamponade, the movable part of the upper end fixed connection lower mould of inner tube, the fixed part of lower mould is fixed to be set up in lower slider, the inner wall of inner tube sets up the tamponade, the lower extreme sliding seal cover of inner tube connects in the inside of overcoat, the inner wall of overcoat sets up the limiting plate in the below of inner tube.

Furthermore, the starting cylinder comprises a push plug, a push rod and a return spring, the return spring is arranged between the upper end of the push plug and the starting cylinder, the lower end of the push rod is fixedly connected with the push plug, and the upper end of the push rod pair extends out of the starting cylinder.

The lower space of the press plug of the drawing cylinder is communicated with the lower space of the push plug of the starting cylinder through a drawing liquid outlet pipe, and when the upper die presses the lower die at the lower end of the rack, the movable part of the lower die moves downwards to finish the forming action. In the process, the inner cylinder and the press plug move downwards to press oil in the outer sleeve into the starting cylinder, when the upper sliding block moves upwards, the upper die leaves the lower die, and the return spring pushes the push plug to move downwards so that the oil in the starting cylinder enters the outer sleeve to complete the return of the inner cylinder and the press plug.

Furthermore, the lower end of the lower sliding block is fixedly connected with a follow-up piston in a follow-up cylinder, and a follow-up liquid outlet pipe of the follow-up cylinder is communicated with a pressure-bearing liquid inlet pipe of the pressure-bearing cylinder through a starting valve.

The top of starting the jar sets up the timing jar, and the timing jar is inside to be filled with fluid, the top of timing jar sets up spacing conveyer belt, the lower surface of timing jar sets up the elastic membrane that position and push rod correspond, the upper end of elastic membrane sets up the connecting rod, the upper end of connecting rod stretches out the timing jar and sets up the time limit magnetic path, and the conveying face of spacing conveyer belt evenly sets up the magnetism that corresponds with the time limit magnetic path and inhales the piece, the time limit magnetic path is in inhaling the piece opposite face with magnetism and setting up the gyro wheel.

Furthermore, the magnetic attraction force between the time-limited magnetic block and the magnetic attraction block and the elastic force of the elastic membrane meet the following conditions: when the roller of the time-limiting magnetic block is in contact with the magnetic block, the time-limiting magnetic block and the magnetic block attract each other, and the contact between the roller of the time-limiting magnetic block and the magnetic block is kept; when the roller of the time-limiting magnetic block leaves the magnetic block, the elastic force of the elastic membrane pulls back the time-limiting magnetic block, and the elastic membrane returns to the initial state. The timing cylinder is used for controlling the timing opening and closing of the starting valve.

Specifically, a valve core and a valve core return spring are arranged inside the starting valve, the space on one side of the valve core inside the starting valve is communicated with the inner cavity of the timing cylinder through a control oil pipe, and the return spring is arranged between the other side of the valve core and the inner wall of the starting valve. The position of the valve core meets the following conditions: when the oil in the timing cylinder is filled with the space on one side of the valve core in the starting valve, the through hole on the valve core is communicated with the follow-up liquid outlet pipe and the pressure-bearing liquid inlet pipe.

The oil in the outer sleeve is pressed into the starting cylinder, the push plug moves upwards, the push rod can push the elastic membrane and the time-limiting magnetic block at the upper end of the elastic membrane to move upwards, the roller of the time-limiting magnetic block is in adsorption contact with the magnetic block, the limiting conveyor belt drives the magnetic block to move at the moment, and the magnetic block is not separated from the time-limiting magnetic block; when the time-limited magnetic block is in contact with the magnetic block, the elastic membrane extrudes oil in the timing cylinder, so that the oil in the timing cylinder is filled in a space on one side of a valve core inside the starting valve, and the follow-up liquid outlet pipe is communicated with the pressure-bearing liquid inlet pipe. When the lower end of the inner cylinder contacts the limiting block, the lower sliding block continues to move downwards, the drawing cylinder and the lower sliding block are pushed to continue to move, the servo piston moves downwards, and oil of the servo piston enters the pressure bearing cylinder through the servo liquid outlet pipe, the starting valve and the pressure bearing liquid inlet pipe.

Furthermore, a pressure-bearing piston and a pressure-bearing spring are arranged in the pressure-bearing cylinder, the pressure-bearing spring is arranged between the lower surface of the pressure-bearing piston and the inner wall of the pressure-bearing cylinder, and a liquid inlet of the pressure-bearing liquid inlet pipe is positioned above the pressure-bearing piston. When the upper sliding block moves upwards, the upper die leaves the lower die, and the pressure-bearing spring pushes the pressure-bearing piston to move upwards, so that oil in the pressure-bearing cylinder enters the interior of the follow-up cylinder, and the return of the follow-up piston is completed.

In the invention, the upper space and the lower space of the follow-up piston of the follow-up cylinder are communicated through the return pipe, the return pipe is provided with the oil pump, the oil pump can control the oil quantity of the upper space and the lower space of the follow-up piston, and the position of the lower slide block is adjusted by adjusting the position of the follow-up piston so as to determine the position of a pressure point.

Furthermore, balance components are arranged between the lower sliding block and the upper sliding block and the rack respectively. The balance assembly comprises a right cylinder and a left cylinder, oil is filled in the right cylinder and the left cylinder, the left side of the piston inside the right cylinder is communicated with the right side of the piston inside the left cylinder, the right side of the piston inside the right cylinder is communicated with the left side of the piston inside the left cylinder, the balance assembly is used for balancing the left position and the right position of the upper sliding block or the lower sliding block, and friction between the upper sliding block and the upper sliding rail, between the lower sliding block and the lower sliding rail is reduced. When the pressures on the two sides of the upper sliding block or the lower sliding block are unbalanced, the right cylinder and the left cylinder are conveyed by oil, so that the pressure balance on the two sides of the upper sliding block or the lower sliding block is completed, and meanwhile, the impact can be reduced by the oil.

The controller of the press machine system is connected with the follow-up module and the crank rotating module, the oil pump in the follow-up module is electrically connected with the controller, and the rotating motor, the brake and the clutch in the crank rotating module are electrically connected. The controller controls the oil pump, the rotating motor, the brake and the clutch to enable the press machine to normally operate. The brake and clutch here are the same in function and function as the brake and clutch of prior art presses, the rotating electrical machine being used to drive the crank in rotation.

The stamping process of the invention comprises the following steps:

the method comprises the following steps: according to the machining requirement, the position of the follow-up piston is adjusted through an oil pump so as to determine the position of the lower die, namely the position of a pressure point;

step two: the crank is driven to rotate, and the crank drives the upper sliding block to slide in the vertical direction, so that the upper die presses the lower die at the lower end of the rack;

step three: when the upper die contacts the lower die, the movable part of the lower die moves downwards, in the process, the inner cylinder and the press plug move downwards, oil in the outer sleeve is pressed into the starting cylinder to finish the forming action, meanwhile, the push plug moves upwards, the push rod can push the elastic membrane and the time-limiting magnetic block at the upper end of the elastic membrane to move upwards, and when the lower end of the inner cylinder contacts the limiting block, the time-limiting magnetic block is in adsorption contact with the magnetic block and can form stable relative sliding;

step four: the upper sliding block continues to move downwards due to the fact that the upper sliding block does not reach the lower dead point, the lower sliding block is pressed to continue to move downwards, when the time-limited magnetic block is in adsorption contact with the magnetic attraction block, the elastic membrane extrudes oil in the timing cylinder, so that the oil in the timing cylinder is filled in a space on one side of a valve core inside the starting valve, the follow-up liquid outlet pipe is communicated with the pressure-bearing liquid inlet pipe, the lower sliding block pushes the drawing cylinder and the lower sliding block to continue to move, the follow-up piston moves downwards, and the oil of the follow-up piston enters the pressure-bearing cylinder through the follow-up liquid outlet pipe, the;

step five: when the upper sliding block reaches the lower dead point, the upper sliding block moves upwards under the driving of the crank, and the pressure-bearing spring pushes the pressure-bearing piston to move upwards, so that oil in the pressure-bearing cylinder enters the interior of the follow-up cylinder, and the return of the follow-up piston is completed; meanwhile, the return spring pushes the push plug to move downwards, so that oil in the starting cylinder enters the outer sleeve to complete the return of the inner cylinder and the press plug.

Step six: the limiting conveyor belt drives the magnetic suction block to move, so that the magnetic suction block leaves the time-limiting magnetic block, the time-limiting magnetic block and the elastic membrane return, oil in the starting valve returns to the timing cylinder due to the restoring force of the valve core return spring and the negative pressure of the timing cylinder, the valve core returns, and the starting valve is closed.

The invention has the beneficial effects that:

1. the positive node point selection stamping control method can select the pressure application point in the process of moving the upper sliding block downwards according to the effect required by stamping processing, the pressure application point is not limited to the lower dead point, different stamping process requirements are met, and the applicability is good;

2. the lower die of the press can move continuously after the press performs punch forming on a workpiece, so that the selectivity of a pressing point is realized, the limit of processing with the lower dead point of the crank press with the positive node is broken, different stamping process requirements can be met, and the crank of the press can perform stamping processing through one-time complete reciprocating motion, so that continuous processing is facilitated.

Drawings

FIG. 1 is a step diagram of the present node positive selection point stamping control method;

FIG. 2 is a schematic structural diagram of a press machine based on a node positive setting and point selection stamping control method;

FIG. 3 is a structural schematic diagram of the press machine at the lower slide block position:

FIG. 4 is a schematic view of the present press at the starting cylinder;

FIG. 5 is a schematic structural diagram of the timing cylinder of the press;

FIG. 6 is a schematic view of the press machine at the pressure bearing cylinder;

fig. 7 is a connection diagram of the control part of the press.

In the figure: 1. a frame; 2. a crank; 3. a connecting rod; 4. an upper slide block; 5. a balancing component; 6. An upper die; 7. a lower die; 8. a drawing cylinder; 9. starting a cylinder; 10. a lower slide block; 11. a servo oil cylinder; 12. a pressure bearing cylinder; 13. starting a valve; 14. controlling the oil pipe; 15. a timing cylinder; 16. a limiting conveyor belt; 17. a magnetic block; 101. an upper slide rail; 102. a lower slide rail; 51. a right cylinder; 52. A left cylinder; 81. an inner barrel; 82. a jacket; 83. a limiting plate; 84. pressing and plugging; 85. drawing the liquid outlet pipe; 91. a push plug; 92. a push rod; 93. a return spring; 111. a follower piston; 112. a return pipe; 113. an oil pump; 114. a follow-up liquid outlet pipe; 121. a pressure-bearing liquid inlet pipe; 122. a pressure-bearing piston; 123. a pressure-bearing spring; 131. a valve core; 132. a valve core return spring; 151. an elastic film; 152. a connecting rod; 153. a time-limiting magnetic block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, the node forward positioning and point selecting stamping control method includes the following steps:

s1: the crank rotation module controls the crank to rotate, and the sliding block moves downwards to enable the upper die to press the lower die;

s2: the slide block is punched and formed above the lower dead point;

s3: the sliding block continues to slide downwards, and the follow-up module controls the lower die to slide along with the sliding block until the sliding block reaches a lower dead point;

s4: the slide block moves upwards, and the lower die returns to the position corresponding to the pressure point.

In the embodiment, the positive node and point selection stamping control method can select the pressure application point in the process of moving the upper sliding block downwards according to the effect required by stamping processing, the pressure application point is not limited to the lower dead point, different stamping process requirements are met, and the applicability is good.

Referring to fig. 2 and 3, the lower die follower node positive crank press in the embodiment includes a frame 1, and a crank 2, an upper slider 4, a drawing cylinder 8, a starting cylinder 9, a lower slider 10, a follower cylinder 11, a pressure-bearing cylinder 12, a timing cylinder 15, and a limit conveyor belt 16 are disposed on the frame 1. Wherein crank 2 and 1 swivelling joint of frame, crank 2 pass through connecting rod 3 and connect slider 4, and connecting rod 3 articulates crank 2 and top shoe 4 respectively, top shoe 4 and the vertical last slide rail 101 sliding connection who sets up in frame 1 upper end, mould 6 is gone up in the fixed setting of lower extreme of top shoe 4, and the crank rotation module in this press system can drive crank 2 rotatory, and crank 2 can drive slider 4 and slide in vertical direction, makes and goes up mould 6 and press the lower mould 7 of frame 1 lower extreme.

Further, the drawing cylinder 8, the starting cylinder 9, the lower slider 10, the follow-up cylinder 11, the pressure-bearing cylinder 12, the timing cylinder 15 and the limiting conveyor belt 16 belong to a follow-up module. Specifically, lower slide rail 102 sliding connection of the vertical setting of slider 10 and frame 1 lower extreme down, the fixed deep-drawing jar 8 that sets up in upper end of slider 10 down, deep-drawing jar 8 includes inner tube 81, overcoat 82, limiting plate 83 and pressure plug 84, the movable part of the upper end fixed connection lower mould 7 of inner tube 81, the fixed part of lower mould 7 is fixed to be set up in slider 10 down, the inner wall of inner tube 81 sets up pressure plug 84, the lower extreme sliding seal cover of inner tube 81 connects in the inside of overcoat 82, the inner wall of overcoat 82 sets up limiting plate 83 in the below of inner tube 81.

Further, the starting cylinder 9 comprises a push plug 91, a push rod 92 and a return spring 93, the return spring 93 is arranged between the upper end of the push plug 91 and the starting cylinder 9, the lower end of the push rod 92 is fixedly connected with the push plug 91, and the upper end of the pair of push rods 92 extends out of the starting cylinder 9.

The space under the press plug 84 of the drawing cylinder 8 is communicated with the space under the push plug 91 of the starting cylinder 9 through the drawing liquid outlet pipe 85, when the upper die 6 presses the lower die 7 at the lower end of the frame 1, the movable part of the lower die 7 moves downwards, and the forming action is completed. In the process, the inner cylinder 81 and the press plug 84 move downwards to press the oil in the outer sleeve 82 into the starting cylinder 9, when the upper slide block 3 moves upwards, the upper die 6 leaves the lower die 7, and the return spring 93 pushes the push plug 91 to move downwards, so that the oil in the starting cylinder 9 enters the outer sleeve 82, and the return of the inner cylinder 81 and the press plug 84 is completed.

Further, the lower end of the lower slider 10 is fixedly connected with a follower piston 111 inside the follower cylinder 11, and a follower liquid outlet pipe 114 of the follower cylinder 11 is communicated with a pressure-bearing liquid inlet pipe 121 of the pressure-bearing cylinder 12 through the starting valve 13.

Referring to fig. 4 and 5, a timing cylinder 15 is arranged above the starting cylinder 9, oil is filled in the timing cylinder 15, a limiting conveyor belt 16 is arranged above the timing cylinder 15, an elastic membrane 151 corresponding to the push rod 92 is arranged on the lower surface of the timing cylinder 15, a connecting rod 152 is arranged at the upper end of the elastic membrane 151, the upper end of the connecting rod 152 extends out of the timing cylinder 15 and is provided with a time-limiting magnetic block 153, a magnetic attraction block 17 corresponding to the time-limiting magnetic block 153 is uniformly arranged on the conveying surface of the limiting conveyor belt 16, and a roller is arranged on the opposite surface of the time-limiting magnetic block 153 and the magnetic attraction block 17.

Further, the magnetic attraction force between the time-limited magnetic block 153 and the magnetic block 17 and the elastic force of the elastic membrane 151 satisfy the following conditions: when the roller of the time-limiting magnetic block 153 is in contact with the magnetic block 17, the time-limiting magnetic block 153 and the magnetic block 17 attract each other, and the contact between the roller of the time-limiting magnetic block 153 and the magnetic block 17 is maintained; when the roller of the time-limiting magnetic block 153 leaves the magnetic block 17, the elastic force of the elastic film 151 pulls back the time-limiting magnetic block 153, and the elastic film 151 returns to the initial state. The timing cylinder is used for controlling the timing opening and closing of the starting valve.

Specifically, a valve core 131 and a valve core return spring 132 are arranged inside the starting valve 13, a space on one side of the valve core 131 inside the starting valve 13 is communicated with an inner cavity of the timing cylinder 15 through a control oil pipe 14, and the return spring 132 is arranged between the other side of the valve core 131 and the inner wall of the starting valve 13. The position of the spool 131 satisfies the following condition: when the oil in the timing cylinder 15 is filled in the space on one side of the valve core 131 inside the starting valve 13, the through hole on the valve core 131 communicates the follow-up liquid outlet pipe 114 and the pressure-bearing liquid inlet pipe 121.

The oil liquid in the outer sleeve 82 is pressed into the starting cylinder 9, the push plug 91 moves upwards, the push rod 92 can push the elastic membrane 151 and the time-limiting magnetic block 153 at the upper end of the elastic membrane 151 to move upwards, the roller of the time-limiting magnetic block 153 is in adsorption contact with the magnetic block 17, at the moment, the limiting conveyor belt 16 drives the limiting sleeve 17 to move, and the magnetic block 17 is not separated from the time-limiting magnetic block 153; when the time-limited magnetic block 153 and the magnetic block 17 are kept in contact, the elastic membrane 151 extrudes oil in the timing cylinder 15, so that the oil in the timing cylinder 15 is filled in the space on one side of the valve core 131 in the starting valve 13, and the follow-up liquid outlet pipe 114 is communicated with the pressure-bearing liquid inlet pipe 121. When the lower end of the inner cylinder 81 contacts the limiting block 83, the lower slider 4 continues to move downwards, the drawing cylinder 8 and the lower slider 10 are pushed to continue to move, the follower piston 111 moves downwards, and oil of the follower piston 111 enters the pressure bearing cylinder 12 through the follower liquid outlet pipe 114, the starting valve 13 and the pressure bearing liquid inlet pipe 121.

Further, referring to fig. 6, a pressure-bearing piston 122 and a pressure-bearing spring 123 are arranged inside the pressure-bearing cylinder 12, the pressure-bearing spring 123 is arranged between the lower surface of the pressure-bearing piston 122 and the inner wall of the pressure-bearing cylinder 12, and a liquid inlet of the pressure-bearing liquid inlet pipe 121 is located above the pressure-bearing piston 122. When the upper slide block 3 moves upwards, the upper die 6 leaves the lower die 7, the pressure-bearing spring 123 pushes the pressure-bearing piston 122 to move upwards, so that oil in the pressure-bearing cylinder 12 enters the interior of the follow-up cylinder 11, and the return of the follow-up piston 111 is completed.

In this embodiment, the upper space and the lower space of the follower piston 111 of the follower cylinder 11 are communicated through a return pipe 112, an oil pump 113 is disposed on the return pipe 112, the oil pump 113 can control the oil amount in the upper space and the lower space of the follower piston 111, and the position of the lower slider 10 is adjusted by adjusting the position of the follower piston 111 to determine the position of the pressure point.

In this embodiment, a balance assembly 5 is disposed between the lower slider 10 and the upper slider 4 and the frame 1. Balance assembly 5 includes right cylinder 51 and left cylinder 52, and the left side of upper sliding block 4 is extended and fixed connection to the right side of the work connecting rod level of left cylinder 52, and the right side of upper sliding block 4 is extended and fixed connection to the left side of the work connecting rod level of right cylinder 51, and right cylinder 51 and the inside fluid that is full of left cylinder 52, the inside piston left side of right cylinder 51 with the inside piston right side intercommunication of left cylinder 52, the inside piston right side of right cylinder 51 with the inside piston left side intercommunication of left cylinder 52, balance assembly 5 is used for balancing the position about of upper sliding block 4, reduces the friction between upper sliding block 4 and last slide rail 101. When the pressures on the two sides of the upper sliding block 4 are unbalanced, the right cylinder 51 and the left cylinder 52 are conveyed through oil, so that the pressure balance on the two sides of the upper sliding block 4 is completed, and meanwhile, the impact can be reduced by the oil. Likewise, the lower slider 10 is coupled to the corresponding balancing assembly 5 in the same manner as the upper slider 4 for balancing the lower slider 10.

The controller of the press machine system is connected with a follow-up module and a crank rotating module, an oil pump 113 in the follow-up module is electrically connected with the controller, and a rotating motor, a brake and a clutch in the crank rotating module are electrically connected. The controller controls the oil pump, the rotating motor, the brake and the clutch to enable the press machine to normally operate. The brake and clutch here are the same in function and function as the brake and clutch of prior art presses, the rotating electrical machine being used to drive the crank in rotation.

The stamping process of the press in the embodiment is as follows:

the method comprises the following steps: according to the processing requirement, the position of the follower piston 111 is adjusted by an oil pump 113 to determine the position of the lower die 7, namely the position of the pressure point;

step two: the crank 2 is driven to rotate, the crank 2 drives the upper slide block 4 to slide in the vertical direction, and the upper die 6 is pressed to the lower die 7 at the lower end of the rack 1;

step three: when the upper die 6 contacts the lower die 7, the movable part of the lower die 7 moves downwards, in the process, the inner cylinder 81 and the press plug 84 move downwards, oil in the outer sleeve 82 is pressed into the starting cylinder 9, the forming action is completed, meanwhile, the push plug 91 moves upwards, the push rod 92 can push the elastic membrane 151 and the time-limiting magnetic block 153 at the upper end of the elastic membrane 151 to move upwards, and when the lower end of the inner cylinder 81 contacts the limiting block 83, the magnetic block 15 is in adsorption contact with the magnetic block 17 during limiting, and stable relative sliding can be formed;

step four: because the upper sliding block 3 does not reach the bottom dead center, the upper sliding block 3 continues to move downwards, the lower sliding block 4 is pressed to continue to move downwards, when the time-limited magnetic block 15 is in adsorption contact with the magnetic attraction block 17, the elastic membrane 151 extrudes oil in the timing cylinder 15, so that the oil in the timing cylinder 15 fills the space on one side of the valve core 131 inside the starting valve 13, the follow-up liquid outlet pipe 114 is communicated with the pressure-bearing liquid inlet pipe 121, the lower sliding block 4 pushes the drawing cylinder 8 and the lower sliding block 10 to continue to move, the follow-up piston 111 moves downwards, and the oil in the follow-up piston 111 enters the pressure-bearing cylinder 12 through the follow-up liquid outlet pipe 114, the starting valve 13 and the pressure;

step five: when the upper sliding block 3 reaches the bottom dead center, the upper sliding block 3 is driven by the crank 2 to move upwards, and at the moment, the pressure-bearing spring 123 pushes the pressure-bearing piston 122 to move upwards, so that oil in the pressure-bearing cylinder 12 enters the inside of the follow-up cylinder 11, and the return of the follow-up piston 111 is completed; meanwhile, the return spring 93 pushes the push plug 91 to move downwards, so that oil in the starting cylinder 9 enters the inner part of the outer sleeve 82, and the return of the inner cylinder 81 and the press plug 84 is completed.

Step six: the limit conveyor belt 16 drives the magnetic block 17 to move, so that the magnetic block 17 leaves the time-limiting magnetic block 153, the time-limiting magnetic block 153 and the elastic membrane 151 return to the original positions, oil in the starting valve 13 returns to the timing cylinder 15 due to the restoring force of the valve core return spring 132 and the negative pressure of the timing cylinder 15, the valve core 131 returns to the original position, and the starting valve 13 is closed.

The process is a one-time stamping process of the press. The crank 2 rotates continuously, and continuous processing of the press can be realized.

The pressing point of the press machine in the embodiment can be not at the bottom dead center, and the pressing point can be selected in the process of moving the upper slide block downwards according to the effect required by stamping processing, so that the applicability is good; the lower die 7 of the press can follow the workpiece after the press performs punch forming on the workpiece, so that the crank can perform stamping processing through one-time complete reciprocating motion, and continuous processing is facilitated.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.