CN114249270A

CN114249270A - Bilateral blank pressing equipment for plates

Info

Publication number: CN114249270A
Application number: CN202111291748.8A
Authority: CN
Inventors: 陈凤
Original assignee: Jiaxing Angteng Environmental Protection Technology Co ltd
Current assignee: Jiaxing Angteng Environmental Protection Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-29
Anticipated expiration: 2041-11-03
Also published as: CN114249270B

Abstract

The invention provides a plate double-side edge pressing device, and belongs to the technical field of machining devices. The double-side edge pressing device comprises a conveying device, a double-side edge pressing device and a hydraulic driving system, wherein a first conveying mechanism and a second conveying mechanism of the conveying device are symmetrically arranged on the front side and the rear side of a conveying lifting supporting seat, the first conveying mechanism comprises a first conveying hydraulic cylinder, a first conveying rack and a first conveying push plate, the second conveying mechanism comprises a second conveying hydraulic cylinder, a second conveying rack and a second conveying push plate, the double-side edge pressing device comprises a synchronous transmission shaft, a synchronous transmission shaft supporting seat, a first transmission gear, a second transmission gear, a first transmission assembly, a second transmission assembly, a first edge pressing assembly and a second edge pressing assembly, and the hydraulic driving system comprises a conveying edge pressing branch circuit, a lifting branch circuit and an overflow branch circuit. The invention can synchronously realize the intermittent conveying and the edge pressing processing of the plate, and the symmetry of the edge pressing at the two sides of the plate and the position accuracy of the punch groove on the plate are very good.

Description

Bilateral blank pressing equipment for plates

Technical Field

The invention relates to the technical field of machining, in particular to a double-side edge pressing device for a plate.

Background

Sheet metal is a very important basic material in machining. There are many types of sheet metal, classified by thickness: can be divided into thin plates, medium plates, thick plates and extra-thick plates; the production method comprises the following steps: can be divided into hot rolled steel sheets and cold rolled steel sheets; classifying according to surface features: can be divided into galvanized sheet, tin plate, composite steel sheet and color coating steel sheet; classified by use: can be divided into bridge steel plates, boiler steel plates, ship-building steel plates, armor steel plates, automobile steel plates, roof steel plates, structural steel plates, electrical steel plates, spring steel plates and the like. The metal plate is a common metal plate processing mode, and the metal plate is a comprehensive cold processing technology aiming at a metal sheet, and comprises shearing, punching, cutting, compounding, folding, riveting, splicing, edge pressing, forming and the like. Particularly, in the sheet metal part of the electronic and electric appliances, due to the installation and embedding requirements, a slotted hole is often formed on the sheet metal part, and the two sides are symmetrically subjected to edge pressing so as to be clamped and installed accurately. The current common processing mode is as follows: the continuous notching processing is carried out on the long-strip plate firstly, then the intermittent blank pressing processing is carried out on the long-strip plate, then the long-strip plate after blank pressing is cut, a plurality of sheet metal base plates are formed, and then the sheet metal parts are formed through the processing of bending, flanging and the like. At present, the conventional beading machine generally adopts continuous beading, so that intermittent beading is difficult to be carried out on a long plate, and the conventional beading machine cannot be used for finishing the process because the symmetry of the beading at two sides and the position requirement of opposite grooves are very high.

Disclosure of Invention

The invention aims to provide a plate double-side edge pressing device which can synchronously realize intermittent conveying and edge pressing processing of a plate, and has good symmetry of the edges on two sides of the plate and good position accuracy relative to a punching groove on the plate.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a double-side edge pressing device for a plate comprises an upper frame, a lower frame, a conveying device, a double-side edge pressing device and a hydraulic driving system, wherein the upper frame and the lower frame are fixedly arranged, the upper frame is positioned above the lower frame, the conveying device comprises a conveying lifting supporting seat, a first conveying lifting hydraulic cylinder, a second conveying lifting hydraulic cylinder, a first conveying mechanism and a second conveying mechanism, the first conveying lifting hydraulic cylinder comprises a first conveying lifting hydraulic cylinder body and a first conveying lifting piston rod, the second conveying lifting hydraulic cylinder comprises a second conveying lifting hydraulic cylinder body and a second conveying lifting piston rod, the upper end of the first conveying lifting hydraulic cylinder body and the upper end of the second conveying lifting hydraulic cylinder body are both fixed on the upper frame, the lower end of the first conveying lifting piston rod and the lower end of the second conveying lifting piston rod are both connected with the conveying lifting supporting seat, the front side and the rear side of the conveying lifting supporting seat are symmetrically provided with a first conveying rack track groove and a second conveying rack track groove, the front side and the rear side of the conveying lifting supporting seat are further symmetrically provided with a first push plate track groove and a second push plate track groove, the first conveying rack track groove is communicated with the first push plate track groove, the second conveying rack track groove is communicated with the second push plate track groove, the first conveying mechanism and the second conveying mechanism are symmetrically arranged on the front side and the rear side of the conveying lifting supporting seat, the first conveying mechanism comprises a first conveying hydraulic cylinder, a first conveying rack and a first conveying push plate, the first conveying push plate is arranged at the right end of the first conveying rack, the first conveying rack can be arranged on the first conveying rack track groove of the conveying lifting supporting seat in a left-right sliding manner, the first conveying push plate can be arranged on the first push plate track groove of the conveying lifting supporting seat in a left-right sliding manner, the first conveying hydraulic cylinder comprises a first conveying cylinder body and a first conveying piston rod, the first conveying hydraulic cylinder is fixed on the conveying lifting support seat, the right end of the first conveying piston rod is connected with the first conveying rack, the second conveying mechanism comprises a second conveying hydraulic cylinder, a second conveying rack and a second conveying push plate, the second conveying push plate is installed at the right end of the second conveying rack, the second conveying rack can be arranged on a second conveying rack rail groove of the conveying lifting support seat in a left-right sliding mode, the second conveying push plate can be arranged on a second push plate rail groove of the conveying lifting support seat in a left-right sliding mode, the second conveying hydraulic cylinder comprises a second conveying cylinder body and a second conveying piston rod, the second conveying hydraulic cylinder is fixed on the conveying lifting support seat, and the right end of the second conveying piston rod is connected with the second conveying rack, the double-side edge pressing device comprises a synchronous transmission shaft, a synchronous transmission shaft support, a first transmission gear, a second transmission gear, a first transmission assembly, a second transmission assembly, a first edge pressing assembly and a second edge pressing assembly, the synchronous transmission shaft support is fixed on the conveying lifting support seat, the synchronous transmission shaft is rotatably arranged on the synchronous transmission shaft support, the first transmission gear and the second transmission gear are coaxially arranged on the synchronous transmission shaft, the first transmission gear and the second transmission gear are respectively positioned on two sides of the synchronous transmission shaft support seat, the first transmission gear is meshed with the first conveying rack, the second transmission gear is meshed with the second conveying rack, the first edge pressing assembly and the second edge pressing assembly are symmetrically arranged on the front side and the rear side of the lower rack and the conveying lifting support seat, and the first edge pressing assembly comprises a first upper edge pressing support shaft, The first upper blank pressing wheel, the first lower blank pressing fulcrum and the first lower blank pressing wheel are rotatably arranged at the front end of the conveying lifting supporting seat, the first upper blank pressing wheel is coaxially arranged on the first upper blank pressing fulcrum, the first lower blank pressing fulcrum is rotatably arranged at the front end of the lower frame, the first lower blank pressing wheel is coaxially arranged on the first lower blank pressing fulcrum, the first upper blank pressing wheel is positioned right above the first lower blank pressing wheel, the second blank pressing assembly comprises a second upper blank pressing fulcrum, a second upper blank pressing wheel, a second lower blank pressing fulcrum and a second lower blank pressing wheel, the second upper blank pressing fulcrum is rotatably arranged at the rear end of the conveying lifting supporting seat, the second upper blank pressing wheel is coaxially arranged on the second upper blank pressing wheel, the second lower blank pressing rotatable fulcrum is arranged at the rear end of the lower frame, and the second lower blank pressing wheel is coaxially arranged on the second lower blank pressing fulcrum, the blank pressing wheel is located directly over the blank pressing wheel under the second on the second, first transmission assembly includes sprocket, first transmission chain down sprocket, first transmission chain under the first transmission, sprocket sets up the front end at synchronous transmission shaft with the axle center on the first transmission, sprocket sets up the front end at first last blank pressing pivot with the axle center under the first transmission, sprocket and first transmission chain are connected through first transmission chain under the first transmission, second transmission assembly includes sprocket, second transmission chain down sprocket, sprocket sets up the rear end at synchronous transmission shaft with the axle center on the second transmission, sprocket sets up the rear end at the blank pressing pivot on the second with the axle center under the second transmission, sprocket and second transmission chain are connected through second transmission chain under the second transmission, hydraulic drive system includes hydraulic tank, The hydraulic oil tank is connected with one end of the filter, the other end of the filter is connected with one end of the hydraulic pump, the other end of the hydraulic pump is connected with the conveying blank holder shunt, the lifting shunt and the overflow shunt, the overflow shunt comprises an overflow valve, one end of the overflow valve is connected with the hydraulic pump, the other end of the overflow valve is connected with the hydraulic oil tank, the conveying blank holder shunt comprises a three-position four-way conveying blank holder reversing valve, a first conveying left valve port, a first conveying right valve port, a second conveying left valve port and a second conveying right valve port, the three-position four-way conveying blank holder reversing valve is provided with a valve port A, a valve port B, a valve port C and a valve port D, the first conveying left valve port is arranged at the left end of the first conveying cylinder body, and the first conveying right valve port is arranged at the right end of the first conveying cylinder body, the second conveying left valve port is arranged at the left end of the second conveying cylinder body, the second conveying right valve port is arranged at the right end of the second conveying cylinder body, the valve port A of the three-position four-way conveying blank-pressing reversing valve is connected with the hydraulic pump, the valve port B of the three-position four-way conveying blank-pressing reversing valve is connected with the first conveying left valve port of the first conveying cylinder body, the first conveying right valve port of the first conveying cylinder body is connected with the second conveying left valve port of the second conveying cylinder body, the second conveying right valve port of the second conveying cylinder body is connected with the valve port C of the three-position four-way conveying blank-pressing reversing valve, the valve port D of the three-position four-way conveying blank-pressing reversing valve is connected with the hydraulic oil tank, the lifting branch comprises a three-position four-way lifting reversing valve, a lifting flow dividing valve, a descending flow dividing valve, a first lifting upper valve port, a first lifting lower valve port, a second lifting upper valve port and a second lifting lower valve port, the three-position four-way lifting reversing valve is provided with a valve port E, a valve port F, a valve port G and a valve port H, the lifting flow-dividing valve is provided with a valve port I, a valve port J and a valve port K, the descending flow-dividing valve is provided with a valve port L, a valve port M and a valve port N, the first lifting upper valve port is arranged at the upper end of the first conveying lifting hydraulic cylinder body, the first lifting lower valve port is arranged at the lower end of the first conveying lifting hydraulic cylinder body, the second lifting upper valve port is arranged at the upper end of the second conveying lifting hydraulic cylinder body, the second lifting lower valve port is arranged at the lower end of the second conveying lifting hydraulic cylinder body, the valve port E of the three-position four-way lifting reversing valve is connected with the valve port I of the lifting flow-dividing valve, the valve port J of the lifting flow-dividing valve is connected with the first lifting lower valve port of the first conveying lifting hydraulic cylinder body, and the valve port K of the lifting flow-dividing valve is connected with the second lifting lower valve port of the second conveying lifting hydraulic cylinder body, the three-position four-way lifting reversing valve is characterized in that a valve port F of the three-position four-way lifting reversing valve is connected with a valve port L of the descending flow divider, a valve port M of the descending flow divider is connected with a first lifting upper valve port of a first conveying lifting hydraulic cylinder body, a valve port N of the descending flow divider is connected with a second lifting upper valve port of a second conveying lifting hydraulic cylinder body, and a valve port H of the three-position four-way lifting reversing valve is connected with a hydraulic oil tank.

Further, a rolling support bearing is arranged between the synchronous transmission shaft and the synchronous transmission shaft support.

Furthermore, the first conveying rack and the second conveying rack are the same in type, and the first transmission gear and the second transmission gear are the same in type.

Furthermore, the three-position four-way conveying blank pressing reversing valve and the three-position four-way lifting reversing valve are electromagnetic reversing valves.

Further, the overflow valve is a pilot overflow valve.

Furthermore, the first upper edge pressing wheel, the first lower edge pressing wheel, the second upper edge pressing wheel and the second lower edge pressing wheel are all uniformly provided with edge pressing grooves.

Compared with the prior art, the invention has the following advantages and effects: the plate material which has formed equidistant punching grooves is placed on a lower frame, a three-position four-way conveying blank holder reversing valve is positioned at a middle position, a three-position four-way lifting reversing valve is positioned at a right position, a valve port E of the three-position four-way lifting reversing valve is communicated with a valve port G, a valve port F is communicated with a valve port H, high-pressure oil enters the valve port E of the three-position four-way lifting reversing valve from a hydraulic pump, sequentially passes through the valve port G and a valve port L of a descending flow dividing valve, realizes flow division in the descending flow dividing valve, one path of the high-pressure oil enters a first conveying lifting hydraulic cylinder body from a valve port M of the descending flow dividing valve through a first ascending and descending valve port, one path of the high-pressure oil enters a second conveying lifting hydraulic cylinder body from a valve port N of the descending flow dividing valve through a second ascending and descending valve port, a first conveying lifting piston rod and a second conveying lifting piston rod synchronously move downwards to drive a conveying lifting supporting seat to descend, a first conveying push plate and a second conveying push plate are inserted into the two punching grooves on the plate material, meanwhile, the first upper edge pressing wheel and the second upper edge pressing wheel synchronously descend, the first upper edge pressing wheel and the first lower edge pressing wheel realize the pressing on the front side of the plate, and the second upper edge pressing wheel and the second lower edge pressing wheel realize the pressing on the rear side of the plate. Then, the three-position four-way lifting reversing valve is switched to a middle position, the three-position four-way conveying blank-pressing reversing valve is switched to a right position, a valve port A of the three-position four-way conveying blank-pressing reversing valve is communicated with a valve port C, the valve port B is communicated with the valve port D, high-pressure oil enters the valve port A of the three-position four-way conveying blank-pressing reversing valve from a hydraulic pump and enters the left end of the first conveying cylinder body from the first conveying left valve port through the valve port C, meanwhile, hydraulic oil in the right end of the first conveying cylinder body enters the left end of the second conveying cylinder body through the first conveying right valve port and the second conveying left valve port, and hydraulic oil in the right end of the second conveying cylinder body enters the hydraulic oil tank through the valve port B and the valve port D of the three-position four-way conveying blank-pressing reversing valve. The quantity of the hydraulic oil flowing into the left end of the first conveying cylinder body is the same as that of the hydraulic oil flowing out of the right end of the second conveying cylinder body, and is synchronous and isobaric, and the quantity of the hydraulic oil flowing out of the right end of the second conveying cylinder body is the same as that of the hydraulic oil flowing into the left end of the second conveying cylinder body, and is synchronous and isobaric, so that the quantity of the hydraulic oil flowing into the left end of the first conveying cylinder body is the same as that of the hydraulic oil flowing into the left end of the second conveying cylinder body, and is synchronous and isobaric, and the rightward conveying processes of the first conveying hydraulic cylinder and the second conveying hydraulic cylinder are completely synchronous and isobaric. First conveying hydraulic cylinder and second conveying hydraulic cylinder drive first rack and second rack respectively and move right, the setting in first rack track groove and second rack track groove has guaranteed the stationarity that first rack and second rack moved, and meanwhile, first transport push pedal and second transport push pedal drive panel and carry right, the setting in first push pedal track groove and second push pedal track groove has guaranteed the stationarity that first transport push pedal and second transport push pedal moved. When the plate is conveyed rightwards, due to the rightwards movement of the first conveying rack and the second conveying rack, the first conveying rack and the second conveying rack drive the synchronous transmission shaft to rotate anticlockwise through the first transmission gear and the second transmission gear respectively. A rolling bearing is arranged between the synchronous transmission shaft and the synchronous transmission shaft support, so that abrasion between the synchronous transmission shaft and the synchronous transmission shaft support is effectively reduced, and stable transmission of the synchronous transmission shaft is ensured. The first transmission gear and the second transmission gear are coaxially arranged on the synchronous transmission shaft and are always in the same rotating position, the structure not only plays a role in transmission of double-side edge pressing, but also reversely limits the motion synchronism of the first conveying rack and the second conveying rack, and is beneficial to ensuring the symmetry of the edge pressing on two sides of the plate and the position accuracy of the punch groove on the plate. Synchronous drive shaft passes through chain wheel on the first transmission, first drive chain, first transmission bottom sprocket drives first upper blank pressing fulcrum rotation, install first upper blank pressing wheel on first upper blank pressing fulcrum and rotate thereupon, first upper blank pressing wheel and first bottom blank pressing wheel realize the blank pressing processing to the front end of panel, meanwhile, synchronous drive shaft passes through chain wheel on the second transmission, second drive chain, second transmission bottom sprocket drives second upper blank pressing fulcrum rotation, install second upper blank pressing wheel on the second upper blank pressing fulcrum and rotate thereupon, blank pressing processing to the front end of panel is realized to second upper blank pressing wheel and second bottom blank pressing wheel. The blank pressing processing of the two sides of the plate is synchronous, and accurate clamping and installation of the metal plate after subsequent forming are facilitated. The blank pressing grooves are uniformly distributed on the first upper blank pressing wheel, the first lower blank pressing wheel, the second upper blank pressing wheel and the second lower blank pressing wheel, blank pressing processing on two sides of a plate can be rapidly achieved, and blank pressing effect is good. After one-time processing is finished, the three-position four-way lifting reversing valve is switched to a left position, a valve port E and a valve port F of the three-position four-way lifting reversing valve are communicated, a valve port G and a valve port H are communicated, high-pressure oil enters the valve port E of the three-position four-way lifting reversing valve from a hydraulic pump, sequentially passes through the valve port F and a valve port I of a lifting flow-dividing valve, and is divided in the lifting flow-dividing valve, one path of high-pressure oil enters a first conveying lifting hydraulic cylinder body from a valve port J of the lifting flow-dividing valve through a first lifting lower valve port, the other path of high-pressure oil enters a second conveying lifting hydraulic cylinder body from a valve port K of the lifting flow-dividing valve through a second lifting lower valve port, a first conveying lifting piston rod and a second conveying lifting piston rod synchronously move upwards to drive a conveying lifting supporting seat to lift, the first conveying push plate and the second conveying push plate are separated from two punching grooves on a plate, and simultaneously, a first upper edge pressing wheel and a second edge pressing wheel are synchronously lifted, the first upper edge pressing wheel is separated from the first lower edge pressing wheel, and the second upper edge pressing wheel is separated from the second lower edge pressing wheel. Then, the three-position four-way lifting reversing valve is switched to a middle position, the three-position four-way conveying blank-pressing reversing valve is switched to a left position, a valve port A and a valve port B of the three-position four-way conveying blank-pressing reversing valve are communicated, a valve port C and a valve port D are communicated, high-pressure oil enters the valve port A of the three-position four-way conveying blank-pressing reversing valve from a hydraulic pump and enters the right end of the second conveying cylinder body from the second conveying right valve port through the valve port B, meanwhile, hydraulic oil in the left end of the second conveying cylinder body enters the right end of the first conveying cylinder body through the second conveying left valve port and the first conveying right valve port, and hydraulic oil in the left end of the first conveying cylinder body enters a hydraulic oil tank through the valve port C and the valve port D of the three-position four-way conveying blank-pressing reversing valve. The quantity of the hydraulic oil flowing into the right end of the second conveying cylinder body is the same as that of the hydraulic oil flowing out of the left end of the second conveying cylinder body, and is synchronous and isobaric, and the quantity of the hydraulic oil flowing out of the left end of the second conveying cylinder body is the same as that of the hydraulic oil flowing into the right end of the first conveying cylinder body, and is synchronous and isobaric, so that the quantity of the hydraulic oil flowing into the right end of the first conveying cylinder body is the same as that of the hydraulic oil flowing into the right end of the second conveying cylinder body, and is synchronous and isobaric, and the leftward return processes of the first conveying hydraulic cylinder and the second conveying hydraulic cylinder are completely synchronous and isobaric. The first conveying hydraulic cylinder and the second conveying hydraulic cylinder respectively drive the first conveying rack and the second conveying rack to move leftwards, and meanwhile, the first conveying push plate and the second conveying push plate also realize resetting. And after resetting, entering the next conveying and double-side edge pressing circulation. The overflow valve is a pilot overflow valve, plays roles of constant pressure overflow, pressure stabilization, system unloading and safety protection, and can realize remote control. The three-position four-way conveying blank pressing reversing valve and the three-position four-way lifting reversing valve are electromagnetic reversing valves, and are simple in structure, sensitive in reversing and good in reliability. The invention can synchronously realize the intermittent conveying and the edge pressing processing of the plate, and the symmetry of the edge pressing at the two sides of the plate and the position accuracy of the punch groove on the plate are very good.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a rear view of the present invention.

Fig. 3 is a view from direction a-a of fig. 1 of the present invention.

FIG. 4 is a schematic view of the structure of the processed plate according to the present invention.

In the figure: 1. an upper frame, 2, a lower frame, 3, a conveying device, 4, a double-side edge pressing device, 5, a hydraulic driving system, 6, a conveying lifting support seat, 7, a first conveying lifting hydraulic cylinder, 8, a second conveying lifting hydraulic cylinder, 9, a first conveying mechanism, 10, a second conveying mechanism, 11, a first conveying lifting hydraulic cylinder body, 12, a first conveying lifting piston rod, 13, a second conveying lifting hydraulic cylinder body, 14, a second conveying lifting piston rod, 15, a first conveying rack rail groove, 16, a second conveying rack rail groove, 17, a first push plate rail groove, 18, a second push plate rail groove, 19, a first conveying hydraulic cylinder, 20, a first conveying rack, 21, a first conveying push plate, 22, a first conveying cylinder body, 23, a first conveying piston rod, 24, a second conveying hydraulic cylinder, 25, a second conveying rack, 26, a second conveying push plate, 27. a second conveying cylinder 28, a second conveying piston rod 29, a synchronous transmission shaft 30, a synchronous transmission shaft support 31, a first transmission gear 32, a second transmission gear 33, a first transmission assembly 34, a second transmission assembly 35, a first edge pressing assembly 36, a second edge pressing assembly 37, a first upper edge pressing support shaft 38, a first upper edge pressing wheel 39, a first lower edge pressing support shaft 40, a first lower edge pressing wheel 41, a second upper edge pressing support shaft 42, a second upper edge pressing wheel 43, a second lower edge pressing support shaft 44, a second lower edge pressing wheel 45, a first upper transmission chain wheel 46, a first lower transmission chain wheel 47, a first transmission chain 48, a second upper transmission chain wheel 49, a second lower transmission chain wheel 50, a second transmission chain 51, a hydraulic oil tank 52, a filter 53, a 54, a conveying edge pressing hydraulic pump 55, a lifting branch circuit, 56. the three-position four-way lifting reversing valve comprises a relief branch, 57 an overflow valve, 58 a three-position four-way conveying blank holder reversing valve, 59 a first conveying left valve port, 60 a first conveying right valve port, 61 a second conveying left valve port, 62 a second conveying right valve port, 63 a valve port A, 64 a valve port B, 65 a valve port C, 66 a valve port D, 67 a three-position four-way lifting reversing valve, 68 a lifting diverter valve, 69 a descending diverter valve, 70 a first lifting upper valve port, 71 a first lifting lower valve port, 72 a second lifting upper valve port, 73 a second lifting lower valve port, 74 a valve port E, 75 a valve port F, 76 a valve port G, 77 a valve port H, 78 a valve port I, 79 a valve port J, 80 a valve port K, 81 a valve port L, 82 a valve port M, 83 a valve port N, 84 a rolling support bearing.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

As shown in fig. 1, 2, 3 and 4, a double-side edge pressing device for a sheet material comprises an upper frame 1, a lower frame 2, a conveying device 3, a double-side edge pressing device 4 and a hydraulic driving system 5, wherein the upper frame 1 and the lower frame 2 are fixedly arranged, the upper frame 1 is positioned above the lower frame 2, the conveying device 3 comprises a conveying lifting support seat 6, a first conveying lifting hydraulic cylinder 7, a second conveying lifting hydraulic cylinder 8, a first conveying mechanism 9 and a second conveying mechanism 10, the first conveying lifting hydraulic cylinder 7 comprises a first conveying lifting hydraulic cylinder body 11 and a first conveying lifting piston rod 12, the second conveying lifting hydraulic cylinder 8 comprises a second conveying lifting hydraulic cylinder body 13 and a second conveying lifting piston rod 14, the upper end of the first conveying lifting hydraulic cylinder body 11 and the upper end of the second conveying lifting hydraulic cylinder body 13 are both fixed on the upper frame 1, the lower end of the first conveying lifting piston rod 12 and the lower end of the second conveying lifting piston rod 14 are connected with the conveying lifting support seat 6, the front side and the rear side of the conveying lifting support seat 6 are symmetrically provided with a first conveying rack track groove 15 and a second conveying rack track groove 16, the front side and the rear side of the conveying lifting support seat 6 are further symmetrically provided with a first push plate track groove 17 and a second push plate track groove 18, the first conveying rack track groove 15 is communicated with the first push plate track groove 17, the second conveying rack track groove 16 is communicated with the second push plate track groove 18, the first conveying mechanism 9 and the second conveying mechanism 10 are symmetrically arranged on the front side and the rear side of the conveying lifting support seat 6, the first conveying mechanism 9 comprises a first conveying hydraulic cylinder 19, a first conveying rack 20 and a first conveying push plate 21, the first conveying push plate 21 is arranged at the right end of the first conveying rack 20, the first conveying rack 20 can be arranged on the first conveying rack track groove 15 of the conveying lifting supporting seat 6 in a left-right sliding manner, the first conveying push plate 21 can be arranged on the first push plate track groove 17 of the conveying lifting supporting seat 6 in a left-right sliding manner, the first conveying hydraulic cylinder 19 comprises a first conveying cylinder body 22 and a first conveying piston rod 23, the first conveying hydraulic cylinder 22 is fixed on the conveying lifting supporting seat 6, the right end of the first conveying piston rod 23 is connected with the first conveying rack 20, the second conveying mechanism 10 comprises a second conveying hydraulic cylinder 24, a second conveying rack 25 and a second conveying push plate 26, the second conveying push plate 26 is arranged at the right end of the second conveying rack 25, the second conveying rack 25 can be arranged on the second conveying rack track groove 16 of the conveying lifting supporting seat 6 in a left-right sliding manner, the second conveying push plate 26 can be arranged on the second push plate track groove 18 of the conveying lifting supporting seat 6 in a left-right sliding manner, the second transfer cylinder 24 includes a second transfer cylinder block 27 and a second transfer piston rod 28, the second conveying hydraulic cylinder 27 is fixed on the conveying lifting supporting seat 6, the right end of the second conveying piston rod 28 is connected with the second conveying rack 25, the double-side edge pressing device 4 comprises a synchronous transmission shaft 29, a synchronous transmission shaft support 30, a first transmission gear 31, a second transmission gear 32, a first transmission component 33, a second transmission component 34, a first edge pressing component 35 and a second edge pressing component 36, the synchronous transmission shaft support 30 is fixed on the conveying lifting support seat 6, the synchronous transmission shaft 29 is rotatably arranged on the synchronous transmission shaft support 30, a rolling bearing 84 is arranged between the synchronous transmission shaft 29 and the synchronous transmission shaft support 30, so that abrasion between the synchronous transmission shaft 29 and the synchronous transmission shaft support 30 is effectively reduced, and stable transmission of the synchronous transmission shaft 29 is ensured. The first transmission gear 31 and the second transmission gear 32 are coaxially mounted on the synchronous transmission shaft 29, the first transmission gear 31 and the second transmission gear 32 are respectively located on two sides of the synchronous transmission shaft support 30, the first transmission gear 31 is meshed with the first conveying rack 20, the second transmission gear 32 is meshed with the second conveying rack 25, the first conveying rack 20 and the second conveying rack 25 are identical in model, the first transmission gear 31 and the second transmission gear 32 are identical in model, and the smoothness and the synchronism of plate conveying and edge pressing are guaranteed. The first edge pressing component 35 and the second edge pressing component 36 are symmetrically arranged on the front side and the rear side of the lower frame 2 and the conveying lifting supporting seat 6, the first edge pressing component 35 comprises a first upper edge pressing fulcrum shaft 37, a first upper edge pressing wheel 38, a first lower edge pressing fulcrum shaft 39 and a first lower edge pressing wheel 40, the first upper edge pressing fulcrum shaft 37 is rotatably arranged at the front end of the conveying lifting supporting seat 6, the first upper edge pressing wheel 38 is coaxially arranged on the first upper edge pressing fulcrum shaft 37, the first lower edge pressing fulcrum shaft 39 is rotatably arranged at the front end of the lower frame 2, the first lower edge pressing wheel 40 is coaxially arranged on the first lower edge pressing fulcrum shaft 39, the first upper edge pressing wheel 38 is positioned right above the first lower edge pressing wheel 40, the second edge pressing component 36 comprises a second upper edge pressing fulcrum shaft 41, a second upper edge pressing wheel 42, a second lower edge pressing fulcrum shaft 43 and a second lower edge pressing wheel 44, the second upper edge pressing wheel 41 is rotatably arranged at the rear end of the conveying lifting supporting seat 6, the second upper edge pressing wheel 42 is coaxially mounted on the second upper edge pressing fulcrum 41, the second lower edge pressing fulcrum 43 is rotatably arranged at the rear end of the lower frame 2, the second lower edge pressing wheel 44 is coaxially mounted on the second lower edge pressing fulcrum 43, the second upper edge pressing wheel 42 is located right above the second lower edge pressing wheel 44, edge pressing grooves are uniformly formed in the first upper edge pressing wheel 38, the first lower edge pressing wheel 40, the second upper edge pressing wheel 42 and the second lower edge pressing wheel 44, edge pressing grooves can be rapidly machined in edge pressing on two sides of a plate, and edge pressing effect is good. First drive assembly 33 includes sprocket 45, first transmission lower sprocket 46, first transmission chain 47 in the first transmission, sprocket 45 sets up the front end at synchromesh drive shaft 29 with the axle center in the first transmission, sprocket 46 sets up the front end at first last blank supporting axle 37 with the axle center in the first transmission, sprocket 45 and first transmission lower sprocket 46 are connected through first transmission chain 47 in the first transmission, second drive assembly 34 includes sprocket 48, second transmission lower sprocket 49, second transmission chain 50 in the second transmission, sprocket 48 sets up the rear end at synchromesh drive shaft 29 with the axle center in the second transmission, sprocket 49 sets up the rear end at second last blank supporting axle 41 with the axle center in the second transmission lower sprocket 48, second transmission lower sprocket 49 passes through second transmission chain 50 and connects, hydraulic drive system 5 includes hydraulic tank 51, hydraulic drive system 5, The hydraulic control system comprises a filter 52, a hydraulic pump 53, a conveying blank pressing branch 54, a lifting branch 55 and an overflow branch 56, wherein a hydraulic oil tank 51 is connected with one end of the filter 52, the other end of the filter 52 is connected with one end of the hydraulic pump 53, the other end of the hydraulic pump 53 is connected with the conveying blank pressing branch 54, the lifting branch 55 and the overflow branch 56, the overflow branch 56 comprises an overflow valve 57, one end of the overflow valve 57 is connected with the hydraulic pump 53, the other end of the overflow valve 57 is connected with the hydraulic oil tank 51, the overflow valve 57 is a pilot type overflow valve, and has the functions of constant pressure overflow, pressure stabilization, system unloading and safety protection, and remote control can be realized. The conveying blank-holding branch 54 comprises a three-position four-way conveying blank-holding reversing valve 58, a first conveying left valve port 59, a first conveying right valve port 60, a second conveying left valve port 61 and a second conveying right valve port 62, the three-position four-way conveying blank-holding reversing valve 58 is provided with a valve port A63, a valve port B64, a valve port C65 and a valve port D66, the first conveying left valve port 59 is arranged at the left end of the first conveying cylinder 22, the first conveying right valve port 60 is arranged at the right end of the first conveying cylinder 22, the second conveying left valve port 61 is arranged at the left end of the second conveying cylinder 27, the second conveying right valve port 62 is arranged at the right end of the second conveying cylinder 27, the valve port A63 of the three-position four-way conveying blank-holding reversing valve 58 is connected with the hydraulic pump 53, the valve port B64 of the three-position four-way conveying blank-holding reversing valve 58 is connected with the first conveying left valve port 59 of the first conveying cylinder 22, the first conveying right valve port 60 of the first conveying cylinder 22 is connected with the second conveying left valve port 61 of the second conveying cylinder 27 The second right delivery port 62 of the second delivery cylinder 27 is connected with the port C65 of the three-position four-way delivery blank-holding reversing valve 58, the port D66 of the three-position four-way delivery blank-holding reversing valve 58 is connected with the hydraulic oil tank 51, the lifting branch 55 comprises a three-position four-way lifting reversing valve 58, a lifting diverter valve 59, a descending diverter valve 60, a first lifting upper port 61, a first lifting lower port 62, a second lifting upper port 63 and a second lifting lower port 64, the three-position four-way lifting reversing valve 58 is provided with a port E74, a port F75, a port G76 and a port H77, the lifting diverter valve 68 is provided with a port I78, a port J79 and a port K80, the descending diverter valve 69 is provided with a port L81, a port M82 and a port N83, the first lifting upper port 61 is arranged at the upper end of the first delivery lifting hydraulic cylinder 11, the first lifting lower port 62 is arranged at the lower end of the first delivery lifting hydraulic cylinder 11, the second lifting/lowering upper port 63 is disposed at the upper end of the second lifting/lowering hydraulic cylinder 13, the second lifting/lowering lower port 64 is disposed at the lower end of the second lifting/lowering hydraulic cylinder 13, the port E74 of the three-position four-way lifting/lowering selector valve 67 is connected to the port I78 of the lifting/lowering selector valve 68, the port J79 of the lifting/lowering selector valve 68 is connected to the first lifting/lowering lower port 71 of the first lifting/lowering hydraulic cylinder 11, the port K80 of the lifting/lowering selector valve 68 is connected to the second lifting/lowering lower port 73 of the second lifting/lowering hydraulic cylinder 13, the port F75 of the three-position four-way lifting/lowering selector valve 67 is connected to the port L81 of the lowering/dividing valve 69, the port M82 of the lowering/dividing valve 69 is connected to the first lifting/lowering upper port 70 of the first lifting/lowering hydraulic cylinder 11, the port N83 of the lowering/dividing valve 69 is connected to the second lifting/lowering upper port 72 of the second lifting/lowering hydraulic cylinder 11, the valve port H77 of the three-position four-way lifting change-over valve 67 is connected with the hydraulic oil tank 51. The three-position four-way conveying blank pressing reversing valve 58 and the three-position four-way lifting reversing valve 67 are both electromagnetic reversing valves, and are simple in structure, sensitive in reversing and good in reliability.

Through the technical scheme, when the plate double-side edge pressing device is used, a plate which is provided with equidistant punching grooves is placed on the lower rack 2, the three-position four-way conveying edge pressing reversing valve 58 is in the middle position, the three-position four-way lifting reversing valve 67 is in the right position, the valve port E74 of the three-position four-way lifting reversing valve 67 is communicated with the valve port G76, the valve port F75 is communicated with the valve port H77, high-pressure oil enters the valve port E74 of the three-position four-way lifting reversing valve 67 from the hydraulic pump 53, sequentially passes through the valve port G76 and the valve port L81 of the descending dividing valve 69 to realize division in the descending dividing valve 69, one path of the high-pressure oil enters the first conveying lifting hydraulic cylinder body 11 from the valve port M82 of the descending dividing valve 69 through the first lifting upper valve port 70, the other path of the high-pressure oil enters the second conveying lifting hydraulic cylinder body 13 from the N83 of the descending dividing valve 69 through the second lifting upper valve port 72, and the first conveying lifting piston rod 12 and the second conveying lifting piston rod 14 synchronously move downwards, the conveying lifting support seat 6 is driven to descend, the first conveying push plate 21 and the second conveying push plate 26 are inserted into two punching grooves on the plate, meanwhile, the first upper edge pressing wheel 38 and the second upper edge pressing wheel 42 also descend synchronously, the first upper edge pressing wheel 38 and the first lower edge pressing wheel 40 realize the pressing on the front side of the plate, and the second upper edge pressing wheel 42 and the second lower edge pressing wheel 44 realize the pressing on the rear side of the plate. Then, the three-position four-way lifting change-over valve 67 is switched to the middle position, the three-position four-way conveying blank-holding change-over valve 58 is switched to the right position, the port a63 and the port C65 of the three-position four-way conveying blank-holding change-over valve 58 are communicated, the port B64 and the port D66 are communicated, high-pressure oil enters the port a63 of the three-position four-way conveying blank-holding change-over valve 58 from the hydraulic pump 53 and enters the left end of the first conveying cylinder 22 from the first conveying left port 59 through the port C65, meanwhile, hydraulic oil in the right end of the first conveying cylinder 22 enters the left end of the second conveying cylinder 27 through the first conveying right port 60 and the second conveying left port 61, and hydraulic oil in the right end of the second conveying cylinder 27 enters the hydraulic oil tank 51 through the port B64 and the port D66 of the three-position four-way conveying blank-holding change-over valve 58. Since the amount of the hydraulic oil flowing into the left end of the first delivery cylinder 22 and the amount of the hydraulic oil flowing out of the right end of the second delivery cylinder 27 are the same and are synchronously isobaric, and the amount of the hydraulic oil flowing out of the right end 27 of the second delivery cylinder is the same and are synchronously isobaric, the amount of the hydraulic oil flowing into the left end of the first delivery cylinder 22 and the amount of the hydraulic oil flowing into the left end of the second delivery cylinder 27 are the same and are synchronously isobaric, the rightward delivery processes of the first delivery hydraulic cylinder 19 and the second delivery hydraulic cylinder 24 are completely synchronous and isobaric. The first conveying hydraulic cylinder 19 and the second conveying hydraulic cylinder 24 respectively drive the first conveying rack 20 and the second conveying rack 25 to move rightwards, the first conveying rack track groove 15 and the second conveying rack track groove 16 are arranged, the stability of the movement of the first conveying rack 20 and the second conveying rack 25 is guaranteed, meanwhile, the first conveying push plate 21 and the second conveying push plate 26 drive plates to be conveyed rightwards, and the stability of the movement of the first conveying push plate 21 and the second conveying push plate 26 is guaranteed due to the arrangement of the first push plate track groove 17 and the second push plate track groove 18. When the plate is conveyed rightwards, due to the rightward movement of the first conveying rack 20 and the second conveying rack 25, the first conveying rack 20 and the second conveying rack 25 simultaneously drive the synchronous transmission shaft 29 to rotate anticlockwise through the first transmission gear 31 and the second transmission gear 32 respectively. The first transmission gear 31 and the second transmission gear 32 are coaxially arranged on the synchronous transmission shaft 29, and the first transmission gear 31 and the second transmission gear 32 are always in the same rotating position, so that the structure not only plays a role in transmission of double-side blank pressing, and reversely limits the synchronism of the movement of the first conveying rack 20 and the second conveying rack 25, which is beneficial to ensuring the symmetry of the blank pressing at the two sides of the plate and the position accuracy of the punch groove on the plate, because if there is a lack of synchronism between the motions of the first and second carrier racks 20 and 25, and the motions of the first and

second transmission gears

31 and 32 are also out of synchronism, the synchronizing transmission shaft 29 cannot smoothly rotate, the special structure has the function of transmission power, and the function of ensuring the synchronism of conveying and edge pressing is ensured, so that the special structure is very suitable for processing the special structure and requirements of electric appliance sheet metal. The synchronous transmission shaft 29 drives the first upper blank pressing fulcrum shaft 37 to rotate through the first transmission upper chain wheel 45, the first transmission chain 47 and the first transmission lower chain wheel 49, the first upper blank pressing wheel 38 arranged on the first upper blank pressing fulcrum shaft 37 rotates along with the rotation, the first upper blank pressing wheel 38 and the first lower blank pressing wheel 40 realize blank pressing processing on the front end of the plate, meanwhile, the synchronous transmission shaft 29 drives the second upper blank pressing fulcrum shaft 41 to rotate through the second transmission upper chain wheel 48, the second transmission chain 50 and the second transmission lower chain wheel 49, the second upper blank pressing wheel 42 arranged on the second upper blank pressing fulcrum shaft 41 rotates along with the rotation, and the second upper blank pressing wheel 42 and the second lower blank pressing wheel 44 realize blank pressing processing on the front end of the plate. The blank pressing processing of the two sides of the plate is synchronous, and accurate clamping and installation of the metal plate after subsequent forming are facilitated.

After the primary processing is finished, the three-position four-way lifting reversing valve 67 is switched to the left position, the valve port E74 of the three-position four-way lifting reversing valve 67 is communicated with the valve port F75, the valve port G76 is communicated with the valve port H77, high-pressure oil enters the valve port E74 of the three-position four-way lifting reversing valve 67 from the hydraulic pump 53, sequentially passes through the valve port F75 and the valve port I78 of the lifting diverter valve 68, the flow is divided in the lifting diverter valve 68, one path enters the first conveying lifting hydraulic cylinder 11 from the valve port J79 of the lifting diverter valve 68 through the first lifting lower valve port 71, the other path enters the second conveying lifting hydraulic cylinder 13 from the valve port K80 of the lifting diverter valve 68 through the second lifting lower valve port 73, the first conveying lifting piston rod 12 and the second conveying lifting piston rod 14 synchronously move upwards to drive the conveying lifting bearing seat 6 to lift, the first conveying push plate 21 and the second conveying push plate 26 are separated from two punching grooves on the plate, and simultaneously, the first upper creasing roller 38 and the second upper creasing roller 42 are also raised synchronously, the first upper creasing roller 38 and the first lower creasing roller 40 are separated, and the second upper creasing roller 42 and the second lower creasing roller 44 are separated. Then, the three-position four-way lifting change-over valve 67 is switched to the middle position, the three-position four-way conveying blank-holding change-over valve 58 is switched to the left position, the port a63 and the port B64 of the three-position four-way conveying blank-holding change-over valve 58 are communicated, the port C65 and the port D66 are communicated, high-pressure oil enters the port a63 of the three-position four-way conveying blank-holding change-over valve 58 from the hydraulic pump 53 and enters the right end of the second conveying cylinder 27 from the second conveying right port 62 through the port B64, meanwhile, the hydraulic oil in the left end of the second conveying cylinder 27 enters the right end of the first conveying cylinder 22 through the second conveying left port 61 and the first conveying right port 60, and the hydraulic oil in the left end of the first conveying cylinder 22 enters the hydraulic oil tank 51 through the port C65 and the port D66 of the three-position four-way conveying blank-holding change-over valve 58. Since the amount of the hydraulic oil flowing into the right end of the second delivery cylinder 27 and the amount of the hydraulic oil flowing out of the left end of the second delivery cylinder 27 are the same and are synchronously isobaric, and the amount of the hydraulic oil flowing out of the left end of the second delivery cylinder 27 and the amount of the hydraulic oil flowing into the right end of the first delivery cylinder 22 are the same and are synchronously isobaric, the amount of the hydraulic oil flowing into the right end of the first delivery cylinder 22 and the amount of the hydraulic oil flowing into the right end of the second delivery cylinder 27 are the same and are synchronously isobaric, the leftward return processes of the first delivery hydraulic cylinder 7 and the second delivery hydraulic cylinder 8 are completely synchronous and isobaric. The first conveying hydraulic cylinder 7 and the second conveying hydraulic cylinder 8 respectively drive the first conveying rack 20 and the second conveying rack 25 to move leftwards, and meanwhile, the first conveying push plate 21 and the second conveying push plate 26 also realize resetting. And after resetting, entering the next conveying and double-side edge pressing circulation.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a panel bilateral blank pressing equipment which characterized in that: the conveying device comprises a conveying lifting support seat, a first conveying lifting hydraulic cylinder, a second conveying lifting hydraulic cylinder, a first conveying mechanism and a second conveying mechanism, wherein the first conveying lifting hydraulic cylinder comprises a first conveying lifting hydraulic cylinder body and a first conveying lifting piston rod, the second conveying lifting hydraulic cylinder comprises a second conveying lifting hydraulic cylinder body and a second conveying lifting piston rod, the upper end of the first conveying lifting hydraulic cylinder body and the upper end of the second conveying lifting hydraulic cylinder body are both fixed on the upper frame, the lower end of the first conveying lifting piston rod and the lower end of the second conveying lifting piston rod are both connected with the conveying lifting support seat, and a first conveying rack track groove and a second conveying rack track groove are symmetrically arranged on the front side and the rear side of the conveying lifting support seat respectively The conveying lifting support seat is characterized by comprising a track groove, a first push plate track groove and a second push plate track groove are further symmetrically arranged on the front side and the rear side of the conveying lifting support seat, the first conveying rack track groove is communicated with the first push plate track groove, the second conveying rack track groove is communicated with the second push plate track groove, the first conveying mechanism and the second conveying mechanism are symmetrically arranged on the front side and the rear side of the conveying lifting support seat, the first conveying mechanism comprises a first conveying hydraulic cylinder, a first conveying rack and a first conveying push plate, the first conveying push plate is arranged at the right end of the first conveying rack, the first conveying rack can be arranged on the first conveying rack track groove of the conveying lifting support seat in a left-right sliding mode, the first conveying push plate can be arranged on the first push plate track groove of the conveying lifting support seat in a left-right sliding mode, the first conveying hydraulic cylinder comprises a first conveying cylinder body and a first conveying piston rod, the first conveying hydraulic cylinder is fixed on the conveying lifting supporting seat, the right end of the first conveying piston rod is connected with the first conveying rack, the second conveying mechanism comprises a second conveying hydraulic cylinder, a second conveying rack and a second conveying push plate, the second conveying push plate is installed at the right end of the second conveying rack, the second conveying rack is arranged on a second conveying rack rail groove of the conveying lifting supporting seat in a left-right sliding mode, the second conveying push plate is arranged on a second push plate rail groove of the conveying lifting supporting seat in a left-right sliding mode, the second conveying hydraulic cylinder comprises a second conveying cylinder body and a second conveying piston rod, the second conveying hydraulic cylinder is fixed on the conveying lifting supporting seat, the right end of the second conveying piston rod is connected with the second conveying rack, and the double-side edge pressing device comprises a synchronous transmission shaft, a synchronous transmission shaft support, a double-side edge pressing device and a double-side edge pressing device, The synchronous transmission shaft support is fixed on the conveying lifting support, the synchronous transmission shaft is rotatably arranged on the synchronous transmission shaft support, the first transmission gear and the second transmission gear are coaxially arranged on the synchronous transmission shaft, the first transmission gear and the second transmission gear are respectively positioned on two sides of the synchronous transmission shaft support, the first transmission gear is meshed with the first conveying rack, the second transmission gear is meshed with the second conveying rack, the first blank pressing assembly and the second blank pressing assembly are symmetrically arranged on the front side and the rear side of the lower rack and the conveying lifting support, the first blank pressing assembly comprises a first upper blank pressing support shaft, a first upper blank pressing wheel, a first lower blank pressing support shaft and a first lower blank pressing wheel, the first upper blank pressing support shaft is rotatably arranged at the front end of the conveying lifting support seat, the first upper blank pressing wheel is coaxially arranged on the first upper blank pressing support shaft, the first lower blank pressing support shaft is rotatably arranged at the front end of the lower frame, the first lower blank pressing wheel is coaxially arranged on the first lower blank pressing support shaft, the first upper blank pressing wheel is positioned right above the first lower blank pressing wheel, the second blank pressing assembly comprises a second upper blank pressing support shaft, a second upper blank pressing wheel, a second lower blank pressing support shaft and a second lower blank pressing wheel, the second upper blank pressing support shaft is rotatably arranged at the rear end of the conveying lifting support seat, the second upper blank pressing wheel is coaxially arranged on the second upper blank pressing support shaft, the second lower blank pressing support shaft is rotatably arranged at the rear end of the lower frame, the second lower blank pressing wheel is coaxially arranged on the second lower blank pressing support shaft, and the second upper blank pressing wheel is positioned right above the second lower blank pressing wheel, first transmission assembly includes sprocket, first transmission lower sprocket, first transmission chain on the first transmission, sprocket sets up the front end at synchromesh transmission shaft with the axle center on the first transmission, sprocket sets up the front end at first last blank holding counter shaft with the axle center under the first transmission, sprocket and first transmission lower sprocket are connected through first transmission chain on the first transmission, second transmission assembly includes sprocket, second transmission lower sprocket, second transmission chain, sprocket coaxial setting is in synchromesh transmission shaft's rear end on the second transmission, sprocket coaxial setting is in the rear end of second last blank holding counter shaft under the second transmission, sprocket and second transmission lower sprocket pass through second transmission chain and connect, hydraulic drive system includes hydraulic tank, filter, hydraulic pump, carries blank holding branch, lift branch, The hydraulic oil tank is connected with one end of the filter, the other end of the filter is connected with one end of the hydraulic pump, the other end of the hydraulic pump is connected with the conveying blank holder shunt, the lifting shunt and the overflow shunt, the overflow shunt comprises an overflow valve, one end of the overflow valve is connected with the hydraulic pump, the other end of the overflow valve is connected with the hydraulic oil tank, the conveying blank holder shunt comprises a three-position four-way conveying blank holder reversing valve, a first conveying left valve port, a first conveying right valve port, a second conveying left valve port and a second conveying right valve port, the three-position four-way conveying blank holder reversing valve is provided with a valve port A, a valve port B, a valve port C and a valve port D, the first conveying left valve port is arranged at the left end of the first conveying cylinder body, the first conveying right valve port is arranged at the right end of the first conveying cylinder body, the second conveying left valve port is arranged at the left end of the second conveying cylinder body, the second conveying right valve port is arranged at the right end of the second conveying cylinder body, the valve port A of the three-position four-way conveying blank-pressing reversing valve is connected with the hydraulic pump, the valve port B of the three-position four-way conveying blank-pressing reversing valve is connected with the first conveying left valve port of the first conveying cylinder body, the first conveying right valve port of the first conveying cylinder body is connected with the second conveying left valve port of the second conveying cylinder body, the second conveying right valve port of the second conveying cylinder body is connected with the valve port C of the three-position four-way conveying blank-pressing reversing valve, the valve port D of the three-position four-way conveying blank-pressing reversing valve is connected with the hydraulic oil tank, the lifting branch comprises a three-position four-way lifting reversing valve, a lifting flow divider, a descending flow divider, a first lifting upper valve port, a first lifting lower valve port, a second lifting upper valve port and a second lifting lower valve port, the three-position four-way lifting reversing valve is provided with a valve port E, a valve port F, a hydraulic oil pump port E, a hydraulic oil pump port F, a hydraulic oil tank and a hydraulic oil tank, The lifting flow-dividing valve is provided with a valve port G and a valve port H, the lifting flow-dividing valve is provided with a valve port I, a valve port J and a valve port K, the descending flow-dividing valve is provided with a valve port L, a valve port M and a valve port N, the first lifting upper valve port is arranged at the upper end of the first conveying lifting hydraulic cylinder body, the first lifting lower valve port is arranged at the lower end of the first conveying lifting hydraulic cylinder body, the second lifting upper valve port is arranged at the upper end of the second conveying lifting hydraulic cylinder body, the second lifting lower valve port is arranged at the lower end of the second conveying lifting hydraulic cylinder body, a valve port E of the three-position four-way lifting reversing valve is connected with the valve port I of the lifting flow-dividing valve, the valve port J of the lifting flow-dividing valve is connected with the first lifting lower valve port of the first conveying lifting hydraulic cylinder body, the valve port K of the lifting flow-dividing valve is connected with the second lifting lower valve port of the second conveying lifting hydraulic cylinder body, and the three-position four-way lifting reversing valve is connected with the valve port L of the descending flow-dividing valve, the valve port M of the descending flow divider valve is connected with the first lifting upper valve port of the first conveying lifting hydraulic cylinder body, the valve port N of the descending flow divider valve is connected with the second lifting upper valve port of the second conveying lifting hydraulic cylinder body, and the valve port H of the three-position four-way lifting reversing valve is connected with the hydraulic oil tank.

2. A sheet double edge pressing apparatus as claimed in claim 1, wherein: and a rolling support bearing is arranged between the synchronous transmission shaft and the synchronous transmission shaft support.

3. The sheet double edge pressing apparatus of claim 1, wherein: the first conveying rack and the second conveying rack are the same in type, and the first transmission gear and the second transmission gear are the same in type.

4. The sheet double edge pressing apparatus of claim 1, wherein: the three-position four-way conveying blank pressing reversing valve and the three-position four-way lifting reversing valve are electromagnetic reversing valves.

5. The sheet double edge pressing apparatus of claim 1, wherein: the overflow valve is a pilot overflow valve.

6. The sheet double edge pressing apparatus of claim 1, wherein: and edge pressing grooves are uniformly distributed on the first upper edge pressing wheel, the first lower edge pressing wheel, the second upper edge pressing wheel and the second lower edge pressing wheel.