Slide press stroke control device

Abstract

A slider stamping stroke control device, it includes the hydraulic valve and guide seat set on the hydraulic cylinder, the top rod is arranged in the guide seat, the top rod lifting air cylinder is vertically arranged on the slider; the valve core of the hydraulic valve, the top rod and the top rod lifting air cylinder are independently arranged from top to bottom, and the top rod brake mechanism is also arranged on the guide seat. Meet the process action and safety requirements of the longitudinal beam stamping equipment.

Description

Technical Field

[0001] This invention relates to a longitudinal beam stamping equipment, and more particularly to a slider stamping stroke control device. Background Technology

[0002] In existing CNC punching production lines for longitudinal beams, the slide block of the longitudinal beam punching equipment is driven by a hydraulic cylinder. The main valve core of the hydraulic cylinder is controlled by a combination of electrical and mechanical devices, which enables the slide block to punch quickly with a short stroke during punching. When changing molds, the slide block has a longer stroke and stops at the top for easy operation.

[0003] When the existing equipment is not operated correctly, especially during unexpected power or gas outages, or when the hydraulic valves malfunction, the slider may sometimes fall or rise unexpectedly. If personnel enter the slider area to operate under these circumstances, it poses a serious safety hazard. Summary of the Invention

[0004] This application provides a slider stamping stroke control device to meet the process operation and safety requirements of longitudinal beam stamping equipment.

[0005] The technical solution adopted in this invention is: a slider stamping stroke control device, which includes a hydraulic valve and a guide seat set on a hydraulic cylinder, a push rod set in the guide seat, and a push rod lifting cylinder set vertically on the slider; the valve core of the hydraulic valve, the push rod and the push rod lifting cylinder are arranged independently from top to bottom, and the characteristic is that a push rod braking mechanism is also set on the guide seat.

[0006] Another specific feature of this solution is that the guide seat is provided with intersecting longitudinal and transverse through holes, and a push rod braking mechanism is installed in the transverse through hole.

[0007] The push rod braking mechanism includes a brake rod disposed in a transverse through hole on a guide seat, a baffle disposed on the guide seat at one end of the transverse through hole, a push rod braking cylinder horizontally disposed on the guide seat at the other end of the transverse through hole, an elongated hole for the push rod to pass through in the middle of the brake rod, a vent hole on the brake rod that passes through the brake rod and the elongated hole and extends to the right end face of the brake rod; a spring disposed between the baffle and the brake rod; the brake rod slides in fit with the transverse through hole in the guide seat; the push rod passes through the longitudinal through hole on the guide seat and the elongated hole of the brake rod.

[0008] The brake lever has a cylindrical outer contour and a keyway. A set screw and a nut are provided on the guide seat. The head of the set screw is inserted into the keyway of the brake lever to prevent the brake lever from rotating.

[0009] The left end of the brake lever is provided with a spring accommodating counterbore which is communicated with the vent hole. The baffle is fixed to the guide seat by bolts. The spring is installed between the baffle and the brake lever and is accommodated in the counterbore of the brake lever. When the plug cavity of the ejector rod brake cylinder is exhausted, the spring pushes the brake lever to the right, the brake lever presses the ejector rod, and the ejector rod is kept stationary. When the plug cavity of the ejector rod brake cylinder is filled with air, the cylinder rod of the ejector rod brake cylinder pushes the brake lever to the left, the brake lever releases the pressing of the ejector rod, and the ejector rod can move up and down.

[0010] A guide sleeve is arranged in the longitudinal through hole of the guide seat, and the ejector rod is arranged in the guide sleeve and is in sliding fit with the guide sleeve.

[0011] The ejector rod comprises upper and lower cylindrical sections, and the diameter of the lower cylindrical section is larger than that of the upper cylindrical section. When the lower cylindrical section of the ejector rod is in contact with the bottom surface of the guide seat during upward movement of the ejector rod, the step surface of the lower cylindrical section just pushes the valve core of the hydraulic valve to the middle position.

[0012] A retaining ring is fixed to the upper cylindrical section of the ejector rod. The retaining ring is fixed to the ejector rod by a set screw. The retaining ring is used to prevent the ejector rod from falling out of the guide seat when the piston rod of the ejector rod lifting cylinder is retracted.

[0013] A single electric control electromagnetic valve is used to control the ejector rod brake cylinder. When the single electric control electromagnetic valve is powered, the plug cavity of the ejector rod brake cylinder is filled with air, the piston rod is extended, and the brake lever is pushed to the left. When the single electric control electromagnetic valve is not powered, the plug cavity of the ejector rod brake cylinder is exhausted, the spring pushes the brake lever to the right (at the same time, the piston rod is passively retracted), the brake lever presses the ejector rod, and the ejector rod is kept stationary.

[0014] A double electric control two-position electromagnetic valve is used to control the ejector rod lifting cylinder. According to the requirement, one of the electromagnetic heads of the double electric control two-position electromagnetic valve is powered to control the extension or retraction of the piston rod. When both electromagnetic heads of the double electric control two-position electromagnetic valve are not powered, the double electric control two-position electromagnetic valve will not change direction, thereby maintaining the extension or retraction state of the piston rod of the ejector rod lifting cylinder, and adding another safety guarantee for the equipment.

[0015] The beneficial effects of the present scheme are: the step surface of the ejector rod limits the upward stroke of the ejector rod. The first beneficial effect is to avoid the safety hazard of accidental falling of the sliding block. Otherwise, due to improper operation, or accidental power failure and then recovery, if the position where the sliding block stops is not good, when the piston rod of the ejector rod lifting cylinder is extended, the ejector rod is pushed upward, the valve core is pushed to the upper position, and the sliding block will accidentally fall. The second beneficial effect is that when the ejector rod is improperly operated, the ejector rod excessively pushes the hydraulic valve core upward, thereby protecting the hydraulic valve.

[0016] The beneficial effects of the present application are as follows: 1. When the slide of the longitudinal beam stamping equipment stops at the upper dead point and waits, the safety hazard of accidental upward movement of the slide can be avoided. Otherwise, if the air supply is accidentally stopped, the push force of the ejector rod lifting cylinder cannot position the valve core at the middle position M, and the slide will move upward. 2. The slide can be operated by point operation, which is convenient for mold debugging.

[0017] The beneficial effects of the present application are as follows: 1. When the slide of the longitudinal beam stamping equipment stops at the upper dead point and waits, the safety hazard of accidental upward movement of the slide can be avoided. Otherwise, if the air supply is accidentally stopped, the push force of the ejector rod lifting cylinder cannot position the valve core at the middle position M, and the slide will move upward. 2. The slide can be operated by point operation, which is convenient for mold debugging. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings.

[0019] Figure 1 is a schematic diagram of the slide stamping stroke control device installation. Figure 2 is a partial enlarged view of the slide stamping stroke control device (when the slide just reaches the lower dead point). Figure 3 is Figure 2 A-A sectional view of. Figure 4 is Figure 3 B-B sectional view of. Figure 5 is a schematic diagram of the structure of the brake lever. Figure 6 is a schematic diagram of the pneumatic principle of the stamping stroke control device.

[0020] In the figure: 1- slide; 2- cylinder seat; 3- induction block; 4- induction switch; 5- machine body; 6- hydraulic cylinder; 7- hydraulic valve; 8- ejector rod; 9- retainer ring; 10- guide seat; 11- ejector rod brake cylinder; 12- top block; 13- ejector rod lifting cylinder; 14- nut; 15- check screw; 16- screw, 17- baffle; 18- bolt; 19- valve core; 20- spring; 21- brake lever; 22- guide sleeve; 23- top screw; 24- air vent; 25- key groove; 26- long round hole; 27- counterbore; 28- single electric control solenoid valve; 29- double electric control two-position solenoid valve. DETAILED DESCRIPTION

[0021] As Figure 1As shown, the longitudinal beam stamping equipment includes: fuselage 5, slider 1, hydraulic cylinder 6, hydraulic valve 7, slider stamping stroke control device, etc. Three inductive switches 4 are arranged on the fuselage 5, and three inductive blocks 3 are correspondingly arranged on the slider 1, which are used to send the lower dead point position signal, the upper dead point position signal and the die changing position signal of the slider 1. The hydraulic valve 7 is fixedly installed on the hydraulic cylinder 6. The ejector rod lifting cylinder 13 is fixed on the slider 1 through the cylinder seat 2, and the piston rod end of the ejector rod lifting cylinder 13 is fixedly installed with the top block 12. The guide seat 10 is fixed on the hydraulic cylinder 6 through the screw 16. The ejector rod 8 is arranged on the guide seat 10.

[0022] As shown in the figure, Figure 2 The valve core 19 of the hydraulic valve 7 has three working positions, which are upper position T, middle position M and lower position B. When the hydraulic valve 7 is powered, the valve core 19 rises, and when the hydraulic valve 7 loses power, the valve core 19 falls. When the valve core 19 is in the upper position T, the hydraulic system drives the hydraulic cylinder 6 to drive the slider 1 to go down; when the valve core 19 is in the lower position B, the hydraulic system drives the hydraulic cylinder 6 to drive the slider 1 to go up; when the valve core 19 is in the middle position M, the hydraulic system makes the slider 1 stop.

[0023] The valve core 19 of the hydraulic valve 7, the ejector rod 8, the top block 12 and the ejector rod lifting cylinder 13 are arranged on a vertical line from top to bottom.

[0024] As shown in the figure, Figure 1 A slider stamping stroke control device, which comprises a hydraulic valve 7 arranged on a hydraulic cylinder 6 and a guide seat 10, an ejector rod 8 arranged in the guide seat 10, an ejector rod lifting cylinder 13 arranged vertically on a slider 1, a valve core 19 of the hydraulic valve 7, the ejector rod 8 and the ejector rod lifting cylinder 13 are independently arranged from top to bottom. The guide seat is also provided with an ejector rod braking mechanism.

[0025] As shown in the figure, Figure 4 The guide seat 10 is provided with a longitudinal through hole and a transverse through hole intersecting through the guide seat 10, a guide sleeve 22 is arranged in the longitudinal through hole of the guide seat 10, and the ejector rod 8 is arranged in the guide sleeve 22. The ejector rod 8 includes two cylindrical segments, the diameter of the lower segment is greater than that of the upper segment, the upper segment of the ejector rod forms a sliding fit with the guide sleeve 22, and the ejector rod 8 can move up and down. When the ejector rod 8 moves upward, the step surface of the lower segment of the ejector rod 8 contacts the bottom surface of the guide seat 10, which just pushes the valve core 19 of the hydraulic valve 7 to the middle position. A retaining ring 9 is fixedly arranged on the upper segment of the ejector rod 8. A top wire 23 is used to fix the retaining ring 9 on the ejector rod 8. It is used to prevent the ejector rod 8 from sliding out of the guide seat 10 and falling when the piston rod of the ejector rod lifting cylinder 13 retracts.

[0026] The guide seat 10 is also provided with an ejector rod braking mechanism. As Figure 4As shown, the push rod braking device includes a brake rod 21 disposed in a transverse through hole on the guide seat 10. A baffle 17 is disposed on the guide seat 10 at one end of the transverse through hole, and a push rod braking cylinder 11 is horizontally disposed on the guide seat 10 at the other end of the transverse through hole. A countersunk hole 27 for accommodating a spring 20 is disposed at the left end of the brake rod 21, and an elongated hole 26 is disposed in the middle of the brake rod 21. A vent hole 24 is disposed on the brake rod 21, penetrating the countersunk hole 27 and the elongated hole 26 and extending to the right end face of the brake rod 21. A spring 20 is disposed between the baffle 17 and the countersunk hole 27. The brake rod 21 is slidably engaged with the transverse through hole in the guide seat 10.

[0027] like Figure 5 As shown, the outer contour of the brake lever 21 is cylindrical.

[0028] like Figure 3 , 4 As shown, the push rod 8 passes through the elongated hole 26 of the brake rod 21.

[0029] like Figure 4 As shown, baffle 17 is fixed to guide seat 10 by bolts 18. Spring 20 is installed between baffle 17 and brake rod 21, and spring 20 is installed in countersunk hole 27 of brake rod 21. When the plug chamber of push rod brake cylinder 11 is vented, spring 20 pushes brake rod 21 to the right, brake rod 21 presses against push rod 8, keeping push rod 8 stationary. When the plug chamber of push rod brake cylinder 11 is vented, its cylinder rod pushes brake rod 21 to the left, releasing the pressure of brake rod 21 on push rod 8, allowing push rod 8 to move up and down.

[0030] like Figure 3 As shown, a keyway 25 is provided on the brake lever 21, and a set screw 15 and a nut 14 for preventing the set screw from loosening are provided on the guide seat 10. The head of the set screw 15 is inserted into the keyway 25 of the brake lever 21 to prevent the brake lever 21 from rotating.

[0031] like Figure 6 As shown, a single solenoid valve 28 controls the push rod brake cylinder 11. When the single solenoid valve 28 is energized, air enters the plug chamber of the push rod brake cylinder 11, the piston rod extends, and pushes the brake rod 21 to the left. When the single solenoid valve is de-energized, air is expelled from the plug chamber of the push rod brake cylinder 11, the spring 20 pushes the brake rod 21 to the right (at the same time, the piston rod is passively retracted), and the brake rod 21 presses against the push rod 8, keeping the push rod 8 stationary.

[0032] The push rod lifting cylinder 13 is controlled by a dual-electrically controlled two-position solenoid valve 29. As needed, one of the solenoid heads of the dual-electrically controlled two-position solenoid valve 29 is energized to control the extension or retraction of the piston rod. When both solenoid heads of the dual-electrically controlled two-position solenoid valve 29 are de-energized, it will not switch directions, thus maintaining the extension or retraction state of the piston rod of the push rod lifting cylinder 13, adding another layer of safety to the equipment.

[0033] When the longitudinal beam stamping equipment needs to be stamped, the plug cavity of the ejector rod brake cylinder 11 is supplied with air, the brake on the ejector rod 8 is released, the piston rod of the ejector rod lifting cylinder 13 is extended, the hydraulic valve 7 is powered, the valve core 19 is raised to the upper position T, the hydraulic cylinder 6 drives the slide 1 to descend, and stamping is performed. When the slide reaches the lower dead point, the inductive switch 4 arranged on the machine body sends a lower dead point signal, the hydraulic valve 7 is de-energized, the valve core 19 automatically descends to the lower position B (when the slide descends, the ejector rod lifting cylinder 13 installed on the slide also descends, the ejector rod 8 falls by gravity, and when the hydraulic valve core is below the lower position B, the hydraulic valve core will not be prevented from descending), the slide 1 ascends (return stroke). When the slide 1 ascends, the ejector rod lifting cylinder 13 installed on the slide also ascends until the ejector rod 8 pushes the valve core upward to the middle position M, forcing the hydraulic cylinder to stop. At this time, the slide 1 stops at the upper dead point, sends an upper dead point signal, and provides the electric control system. The slide 1 completes a working cycle from the upper dead point to the lower dead point and returns to the upper dead point.

[0034] To make the slide 1 stop at the die changing station, the plug cavity of the ejector rod brake cylinder 11 is supplied with air, the piston rod of the ejector rod lifting cylinder 13 is retracted, the hydraulic valve 7 is de-energized, and then the slide 1 ascends until it stops at the die changing station, sends a die changing position signal, and provides the electric control system.

[0035] To realize the inching operation of the slide 1 descending, the method is as follows: when the slide 1 stops at the die changing station, the plug cavity of the ejector rod brake cylinder 11 is in an exhaust state (at this time, the ejector rod 8 and the guide seat 10 remain stationary under the action of the ejector rod brake device), the ejector rod lifting cylinder 13 is in a piston rod retraction state, the hydraulic valve 7 is powered, and then it is immediately de-energized. Then the slide 1 descends a small distance and stops, realizing the inching operation.

Claims

1. A slide stamping stroke control device, comprising a hydraulic valve arranged on a hydraulic cylinder and a guide seat, a ejector rod arranged in the guide seat, a ejector rod lifting cylinder arranged vertically on the slide, a valve core of the hydraulic valve, the ejector rod and the ejector rod lifting cylinder are arranged independently from top to bottom, characterized in that The guiding seat is further provided with a top rod braking mechanism; The guiding seat is provided with a cross-through longitudinal through hole and a transverse through hole, the top rod braking mechanism is arranged in the transverse through hole, the guiding seat at one end of the transverse through hole is provided with a baffle, the guiding seat at the other end of the transverse through hole is horizontally provided with a top rod braking cylinder, a long circular hole for the top rod to pass through is arranged in the middle of the braking rod, a ventilation hole is arranged on the braking rod and extends to the right end face of the braking rod, a spring is arranged between the baffle and the braking rod, the braking rod and the transverse through hole of the guiding seat are in sliding fit, and the top rod passes through the longitudinal through hole of the guiding seat and the long circular hole of the braking rod.

2. The slide press stroke control device according to claim 1, characterized by The braking rod is cylindrical in outer contour, a key groove is arranged on the braking rod, a clamping screw and a nut are arranged on the guiding seat, and the head of the clamping screw is inserted into the key groove of the braking rod.

3. The slide press stroke control apparatus according to claim 1, characterized by A spring accommodating counterbore is arranged at the left end of the braking rod, and the counterbore is through with the ventilation hole.

4. The slide stamping stroke control device of claim 1, wherein A guide sleeve is arranged in the longitudinal through hole of the guiding seat, and the top rod is arranged in the guide sleeve and in sliding fit with the guide sleeve.

5. The slide stamping stroke control apparatus of claim 1 wherein the ejector rod is a push rod. When the top rod lower section cylinder is in contact with the bottom surface of the guiding seat during upward movement, the valve core of the hydraulic valve is just pushed to the middle position.

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