CN113523395B

CN113523395B - Longitudinal and transverse shearing combined unit

Info

Publication number: CN113523395B
Application number: CN202110895832.4A
Authority: CN
Inventors: 李志强
Original assignee: Hebei Yuhe Technology Co ltd
Current assignee: Hebei Yuhe Technology Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-04-15
Anticipated expiration: 2041-08-05
Also published as: CN113523395A

Abstract

The invention relates to the technical field of shearing equipment, and provides a longitudinal and transverse shearing combined unit which comprises a feeding mechanism arranged on a base, and an upper shearing die and a lower shearing die which are arranged in the discharging direction of the feeding mechanism, wherein the upper shearing die comprises a lifting structure and an upper die base arranged on the lifting structure, a plurality of transverse cutters and longitudinal cutters are arranged on the upper die base in an array sliding manner, and the transverse cutters and the longitudinal cutters have sliding freedom degrees in the vertical direction. Through above-mentioned technical scheme, the problem that needs adjustment flitch direction or cutter installation direction when shearing equipment carries out the shearing with great ease among the prior art is solved.

Description

Longitudinal and transverse shearing combined unit

Technical Field

The invention relates to the technical field of shearing equipment, in particular to a longitudinal and transverse shearing combined unit.

Background

The strip steel is a narrow and long steel plate produced by various steel rolling enterprises in order to meet the requirements of different industrial departments on industrialized production of various types of metal or mechanical products, is thin, narrow and long, is also called as steel strip, has a width within 1300mm, and has slightly different lengths according to the size of each coil. The steel band can be made into various products through shearing and welding in the actual production and application process, so that the steel band can be effectively and flexibly sheared and can be more effectively utilized, and the shearing requirement is higher and higher.

In the prior art, generally adopt the plate shearing machine to the shearing of steel band, but when being used for the production process, the steel band that the plate shearing machine sheared off still often can be carrying out vertical or horizontal secondary shearing processing, can cause the production of a lot of leftover bits, if want to carry out the combination shearing of suitable shape vertically and horizontally, either adopt the method of rotatory steel band or adjust the direction of cutter, all can have the problem of inefficiency, the security is poor, the shearing quality is poor in being applied to among the actual production, based on above problem, need urgently one kind can realize the shearing unit of automatically regulated vertical and horizontal shearing.

Disclosure of Invention

The invention provides a longitudinal and transverse shearing combined unit, which solves the problem that the direction of a material plate or the installation direction of a cutter needs to be adjusted when shearing equipment performs longitudinal and transverse shearing in the prior art.

The technical scheme of the invention is as follows:

the utility model provides a cut combination unit with great ease, is in including setting up feeding mechanism and setting on the base the ascending shearing of feeding mechanism ejection of compact side goes up the mould and cuts the bed die, it includes elevation structure and sets up to cut the mould upper die base on the elevation structure, the array slides on the upper die base and is provided with a plurality of cross-cuts and slitting knife, the cross-cut reaches the slitting knife has vertical direction slip degree of freedom.

The upper die base is provided with a plurality of hydraulic holes, the transverse cutter and the longitudinal cutter are arranged in the hydraulic holes in a sliding mode, the transverse cutter and the longitudinal cutter comprise a cutter seat and a cutting edge connected with the cutter seat, the cutter seat is arranged in the hydraulic holes in a sliding mode, the cutter seat is provided with a partition plate, the partition plate divides the hydraulic holes into a propelling cavity and a resetting cavity, the hydraulic system is communicated with the propelling cavity, and the resetting spring is arranged in the resetting cavity and used for enabling the transverse cutter and the longitudinal cutter to slide in a reciprocating mode in the vertical direction.

The hydraulic system comprises a pressurizing system and a pressure relief system which are communicated with the propelling cavity, the pressurizing system comprises an oil inlet arranged on the upper die base and an oil storage cavity communicated with the oil inlet, the oil storage cavity is communicated with all the hydraulic holes, and the hydraulic system further comprises a first hydraulic valve arranged at the inlet end of the propelling cavity.

The pressure relief system comprises a second hydraulic valve and a pressure relief oil path communicated with the propulsion cavity, and the second hydraulic valve is arranged at the oil outlet end of the propulsion cavity.

Feeding mechanism is including unreeling the roller and carrying the clamp roller, carry the clamp roller including last clamp roller and lower clamp roller, still include roll spacing elevating gear, roll spacing elevating gear including slide setting up the bearing frame on the base, with push rod and first lift cylinder that the bearing frame is connected, the output of first lift cylinder with the push rod is connected.

The lifting structure comprises a lifting frame and a driving device, the lifting frame is arranged on the base in a sliding mode, the upper die base is arranged on the lifting frame, the lifting frame is provided with a rectangular frame, the driving device comprises a driving motor and a cam connected with the output end of the driving motor, the cam is rotatably arranged in the rectangular frame, and the rectangular frame is tangent to the cam.

The feeding pressing plate is arranged on the feeding side of the upper die base, the discharging pressing plate is arranged on the discharging side of the upper die base, the feeding pressing plate comprises a first fixing rod and a first pressing plate, the first fixing rod is arranged on the lifting frame, the first pressing plate is arranged on the first fixing rod in a sliding mode, a first spring is sleeved on the first fixing rod, one end of the first spring acts on the lifting frame, and the other end of the first spring acts on the first pressing plate.

The discharging pressing plate comprises a second fixing rod arranged on the lifting frame and a second pressing plate arranged on the second fixing rod in a sliding mode, a second spring is sleeved on the second fixing rod, one end of the second spring acts on the lifting frame, and the other end of the second spring acts on the second pressing plate;

the automatic discharging device is characterized by further comprising a discharging supporting plate arranged on the base in a sliding mode, and an exhaust hole is formed in the supporting surface of the discharging supporting plate.

The automatic feeding device is characterized by further comprising a moving plate arranged on the base in a sliding mode and an adjusting cylinder arranged on the moving plate, wherein the discharging supporting plate is arranged at the telescopic end of the adjusting cylinder.

The discharging hammer is arranged on the base and is positioned on one side of the discharging direction of the discharging pressing plate.

The working principle and the beneficial effects of the invention are as follows:

the invention discloses a longitudinal and transverse shearing combined unit, a feeding mechanism is arranged on a base, an upper shearing die and a lower shearing die are arranged in the feeding direction of the feeding mechanism, the upper and lower dies are matched with each other to form shearing, the upper shearing die drives an upper die base through a lifting mechanism capable of lifting back and forth to realize the periodic shearing action matching with the lower shearing die, a plurality of transverse cutters and longitudinal cutters are arranged on the upper die base, the transverse cutters and the longitudinal cutters are arranged in an array manner, the transverse cutters and the longitudinal cutters have the freedom of sliding in the vertical direction on the upper die base, in the working process, when a steel strip passes through the upper shearing die and the lower shearing die, the transverse cutters and the longitudinal cutters on the upper die base can be adjusted and combined to form continuous shearing blades, and as a plurality of transverse cutters and longitudinal cutters exist, the formed continuous shearing blades can be a plurality of broken line type blade combinations, therefore, when the upper shearing die and the lower shearing die are sheared and combined, the steel belt is sheared to form different cut sections, so that the subsequent combined production work can be better adapted, the longitudinal cutter and the transverse cutter can be combined on line according to needs, and the efficient and accurate shearing work can be realized on the premise of not adjusting the steel belt and disassembling the cutter.

In the prior art, when shearing in different longitudinal and transverse directions, the placing angle of a strip needs to be adjusted or the direction of a cutter needs to be adjusted, the adjustment is time-consuming and labor-consuming, and potential safety hazards exist in the adjustment process.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is an isometric view of the overall construction of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a front view of the overall structure of the present invention;

FIG. 4 is a rear elevational view of the overall construction of the present invention;

FIG. 5 is an isometric view of the lift structure of the present invention;

FIG. 6 is an isometric view of the lift structure of the present invention;

FIG. 7 is an isometric view of the support structure of the present invention;

FIG. 8 is an isometric view of the upper die base of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at B;

FIG. 10 is a bottom view of the upper die base of the present invention;

FIG. 11 is a front view of the upper die base of the present invention;

FIG. 12 is a cross-sectional view taken along the line C-C of FIG. 11;

FIG. 13 is an enlarged view of a portion of FIG. 12 at D;

in the figure: 1. the device comprises a base, 2, an upper die holder, 3, a transverse cutter, 4, a longitudinal cutter, 5, a hydraulic hole, 6, a tool apron, 7, a cutting edge, 8, a partition plate, 9, a pushing cavity, 10, a reset cavity, 11, a reset spring, 12, an oil inlet, 13, an oil storage cavity, 14, a first hydraulic valve, 15, a second hydraulic valve, 16, a pressure relief oil circuit, 17, a unreeling roller, 18, an upper clamping roller, 19, a lower clamping roller, 20, a bearing seat, 21, a push rod, 22, a first lifting cylinder, 23, a lifting frame, 24, a rectangular frame, 25, a driving motor, 26, a cam, 27, a first fixing rod, 28, a first pressing plate, 29, a first spring, 30, a second fixing rod, 31, a second pressing plate, 32, a second spring, 33, a discharging supporting plate, 34, an exhaust hole, 35, a cam, a moving plate, 36, an adjusting cylinder, 37 and a discharging hammer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.

As shown in fig. 1 to 13, the present embodiment provides a vertical and horizontal shearing combined unit, which includes a feeding mechanism disposed on a base 1, and an upper shearing mold and a lower shearing mold disposed in a discharging direction of the feeding mechanism, wherein the upper shearing mold includes a lifting structure and an upper mold base 2 disposed on the lifting structure, a plurality of transverse cutters 3 and longitudinal cutters 4 are disposed on the upper mold base 2 in an array sliding manner, and the transverse cutters 3 and the longitudinal cutters 4 have a sliding freedom degree in a vertical direction.

In the embodiment, a longitudinal and transverse shearing combined unit is disclosed, a feeding mechanism is arranged on a base 1, a shearing upper die and a shearing lower die are arranged in the feeding direction of the feeding mechanism, the upper die and the lower die are matched with each other to form shearing, the shearing upper die drives an upper die base 2 to realize the periodic shearing action matching with the shearing lower die through a lifting mechanism capable of lifting back and forth, a plurality of transverse cutters 3 and longitudinal cutters 4 are arranged on the upper die base 2, the transverse cutters 3 and the longitudinal cutters 4 are arranged in an array manner, the transverse cutters 3 and the longitudinal cutters 4 have the freedom degree of sliding in the vertical direction on the upper die base 2, in the working process, when a steel strip passes through the shearing upper die and the shearing lower die, the transverse cutters 3 and the longitudinal cutters 4 on the upper die base 2 can be adjusted and combined to form a continuous shearing blade 7, and the continuous shearing blade 7 can be formed by combining a plurality of broken line type blades 7 due to the existence of the plurality of the transverse cutters 3 and the longitudinal cutters 4, therefore, when the upper shearing die and the lower shearing die are sheared and combined, the steel belt is sheared to form different cut sections, so that the subsequent combined production work can be better adapted, the longitudinal cutter 4 and the transverse cutter 3 can be combined on line according to needs, and the efficient and accurate shearing work can be realized on the premise of not adjusting the steel belt and disassembling the cutter.

In the prior art, when shearing in different directions of longitudinal and transverse directions, the placing angle of a strip needs to be adjusted or the direction of a cutter needs to be adjusted, the adjustment is time-consuming and labor-consuming, and potential safety hazards exist in the adjustment process.

The upper die holder 2 is provided with a plurality of hydraulic holes 5, the transverse cutter 3 and the longitudinal cutter 4 are arranged in the hydraulic holes 5 in a sliding mode, the transverse cutter 3 and the longitudinal cutter 4 comprise a cutter seat 6 and a cutting edge 7 connected with the cutter seat 6, the cutter seat 6 is arranged in the hydraulic holes 5 in a sliding mode, the cutter seat 6 is provided with a partition plate 8, the hydraulic holes 5 are divided into a propelling cavity 9 and a resetting cavity 10 by the partition plate 8, the upper die holder further comprises a hydraulic system and a reset spring 11, the hydraulic system is communicated with the propelling cavity 9, and the reset spring 11 is arranged in the resetting cavity 10 and used for enabling the transverse cutter 3 and the longitudinal cutter 4 to slide in a reciprocating mode in the vertical direction.

In the embodiment, a plurality of hydraulic holes 5 are arranged on an upper die holder 2, a transverse cutter 3 and a longitudinal cutter 4 are divided into a cutter holder 6 and a cutter edge 7, the cutter holder 6 slides in the hydraulic holes 5, the hydraulic holes 5 are divided into a pushing cavity 9 and a resetting cavity 10 by a partition plate 8 on the cutter holder 6, the cutter edge 7 is arranged at the other end of the cutter holder 6, a hydraulic system is arranged on the upper die holder 2 and is communicated with the pushing cavity 9, the cutter holder 6 can slide in the hydraulic holes 5 through hydraulic control to realize the extension of the cutter edge 7, a reset spring 11 is arranged in the resetting cavity 10, when the transverse cutter 3 or the longitudinal cutter 4 needs to be retracted, the hydraulic system controls the pressure of the pushing cavity 9 to be reduced, at the moment, the reset spring 11 applies pressure to the partition plate 8 on the cutter holder 6 to enable the cutter holder 6 to be retracted into the hydraulic holes 5, the transverse cutter 3 and the longitudinal cutter 4 realize the extension and retraction on the upper die holder 2, the combined arrangement of the cutting edges 7 of the transverse cutter 3 and the longitudinal cutter 4 is formed.

The hydraulic system comprises a pressurizing system and a pressure relief system which are communicated with the propelling cavity 9, the pressurizing system comprises an oil inlet 12 arranged on the upper die base 2, an oil storage cavity 13 communicated with the oil inlet 12, the oil storage cavity 13 is communicated with all the hydraulic holes 5, and the hydraulic system further comprises a first hydraulic valve 14, and the first hydraulic valve 14 is arranged at the inlet end of the propelling cavity 9.

In this embodiment, the hydraulic system for adjusting the cross-cutter 3 and the longitudinal-cutter 4 comprises a pressurizing system and a pressure relief system, an oil inlet 12 is formed in the upper die base 2, an oil storage cavity 13 is communicated with the interior of the upper die base 2, the oil inlet 12 is communicated with the oil storage cavity 13, the oil storage cavity 13 is communicated with all the hydraulic holes 5, the effect of one-inlet-oil multi-port communication is achieved, a first hydraulic valve 14 is installed at the oil inlet end of the propulsion cavity 9, the first hydraulic valve 14 controls the propulsion cavity 9 to be opened and closed, when the cross-cutter 3 or the longitudinal-cutter 4 needs to be pushed out, the first hydraulic valve 14 can control each different cross-cutter 3 and the longitudinal-cutter 4 to form a continuous broken line cutting edge 7, and therefore the longitudinal and transverse combined shearing is achieved.

The pressure relief system comprises a second hydraulic valve 15 and a pressure relief oil path 16 communicated with the propulsion cavity 9, and the second hydraulic valve 15 is arranged at the oil outlet end of the propulsion cavity 9.

In this embodiment, the propelling cavity 9 is not communicated with the pressurizing system, and the pressurizing system pressurizes the propelling cavity 9, so that the cross cutter 3 and the longitudinal cutter 4 can be controllably extended and retracted to form a continuous broken line blade 7, when the combination of the cross cutter 3 and the longitudinal cutter 4 needs to be adjusted, the partially extended cross cutter 3 and the longitudinal cutter 4 need to be retracted, the second hydraulic valve 15 is opened, the second hydraulic valve 15 is in an open state, the first hydraulic valve 14 closes and cuts an oil inlet path, the pressure of the propelling cavity 9 is under the action of the tool apron 6, the oil of the propelling cavity 9 is discharged through a pressure relief oil path 16, the second hydraulic valve 15 is arranged at an oil outlet end of the propelling cavity 9 and corresponds to each propelling cavity 9, and the independent control of the cross cutter 3 and the longitudinal cutter 4 is realized.

Feeding mechanism is including unreeling roller 17 and carrying the clamp roll, carry the clamp roll including last clamp roll 18 and lower clamp roll 19, still include roll spacing elevating gear, roll spacing elevating gear including slide setting up bearing frame 20 on base 1, with push rod 21 and first lift cylinder 22 that bearing frame 20 is connected, the output of first lift cylinder 22 with push rod 21 is connected.

In this embodiment, feeding mechanism on base 1 sends the coil stock into shearing mechanism in, the coil stock can be put on unreeling roller 17 on base 1, the one end of coil stock transmits through carrying the clamp roll, go up clamp roll 18 and lower clamp roll 19 and clip the coil stock, the thickness of coil stock can change, in order to the transport of adaptation coil stock that can be better, go up clamp roll 18 and realize lift operation through roll spacing elevating gear, the tip of going up clamp roll 18 inserts in bearing frame 20, bearing frame 20 slides and sets up on base 1, drive push rod 21 through first lift cylinder 22, drive bearing frame 20 and go up and down on base 1, the roll spacing adjustment of clamp roll 18 and lower clamp roll 19 is gone up in the realization, thereby better adaptation coil stock, lifting means's application scope.

The lifting structure comprises a lifting frame 23 and a driving device, wherein the lifting frame 23 and the driving device are arranged on the base 1 in a sliding mode, the upper die base 2 is arranged on the lifting frame 23, the lifting frame 23 is provided with a rectangular frame 24, the driving device comprises a driving motor 25 and a cam 26 connected with the output end of the driving motor 25, the cam 26 is rotatably arranged in the rectangular frame 24, and the rectangular frame 24 is tangent to the cam 26.

In this embodiment, the shearing operation to coiled material or panel needs to be realized through the shearing action to upper and lower die holder, be provided with crane 23 along vertical direction on base 1, what set up in crane 23's bottom is rectangular frame 24, still set up driving motor 25 on base 1, be connected with cam 26 on driving motor 25's the output, cam 26 rotates in rectangular frame 24, when cam 26 rotates, because the eccentric of cam 26, can drive rectangular frame 24 and reciprocate, rectangular frame 24 remains throughout and is tangent with a sideline of cam 26, thereby drive whole crane 23 and jump from top to bottom, realize the shearing action of upper and lower die holder each other, realize cuting the effect.

The automatic feeding device is characterized by further comprising a feeding pressing plate and a discharging pressing plate which are arranged on the lifting frame 23, wherein the feeding pressing plate is arranged on the feeding side of the upper die base 2, the discharging pressing plate is arranged on the discharging side of the upper die base 2, the feeding pressing plate comprises a first fixing rod 27 and a first pressing plate 28, the first fixing rod 27 is arranged on the lifting frame 23, the first pressing plate 28 is arranged on the first fixing rod 27 in a sliding mode, a first spring 29 is sleeved on the first fixing rod 27, one end of the first spring acts on the lifting frame 23, and the other end of the first spring acts on the first pressing plate 28.

In this embodiment, 2 both sides of upper die base on crane 23, there are feeding clamp plate and ejection of compact clamp plate, feeding clamp plate is when the action is cuted at upper and lower die base, can push down the feeding one side of coil stock or sheet material, can keep when the action is cuted, the material can not be because of the drunkenness that the shearing took place the position, feeding clamp plate's pressure comes from the spring force, two first dead levers 27 of fixed mounting have been gone up to crane 23, then slide on the dead lever and be provided with first ballast plate 28, the cover is equipped with first spring 29 on first dead lever 27, first spring 29 has elasticity to first ballast plate 28, can promote the stability of shearing of ballast plate to panel or coiled material.

The discharging pressing plate comprises a second fixing rod 30 arranged on the lifting frame 23 and a second pressing plate 31 arranged on the second fixing rod 30 in a sliding manner, a second spring 32 is sleeved on the second fixing rod 30, one end of the second spring acts on the lifting frame 23, and the other end of the second spring acts on the second pressing plate 31;

the automatic discharging device also comprises a discharging supporting plate 33 which is arranged on the base 1 in a sliding mode, and a bearing surface of the discharging supporting plate 33 is provided with an exhaust hole 34.

In this embodiment, there is a discharging pressure plate on one side of the discharging direction of the upper die base 2, during the shearing process, through the cooperation of the discharging pressure plate and the feeding pressure plate, the stability and the cut regularity of the shearing process can be effectively improved, wherein the discharging pressure plate and the feeding pressure plate are structurally different, the two structures are similar on the pressing structure, the discharging pressure plate is through the second fixing rod 30 and the second pressing plate 31 installed on the lifting frame 23, and then the elasticity provided by the second spring 32 is matched, the pressing is realized, the discharging support plate 33 is installed below the discharging pressure plate for further improvement and optimization, and the discharging support plate 33 is provided with an exhaust hole 34, during the shearing process, the plate or the coiled material at one end of the discharging direction can always bear larger downward bending force, the sheared material can have the adhesion effect with the discharging support plate 33, in order to realize the smoothness of conveying under the premise of ensuring the shearing stability, the vent 34 on the discharging supporting plate 33 can realize quick separation of the sheared materials, and the stability and the fluency of the equipment are improved.

The automatic feeding device further comprises a moving plate 35 arranged on the base 1 in a sliding mode and an adjusting cylinder 36 arranged on the moving plate 35, wherein the discharging supporting plate 33 is arranged on the telescopic end of the adjusting cylinder 36.

In this embodiment, there is the movable plate 35 that moves along the horizontal direction on base 1, has adjustment cylinder 36 on movable plate 35, and adjustment cylinder 36's output is along vertical direction telescopic sliding, has installed ejection of compact layer board 33 at adjustment cylinder 36's output, just so can realize the stable fastening of ejection of compact end direction according to waiting to cut coiled material or panel of different thickness.

The discharging device also comprises a discharging hammer 37 arranged on the base 1 and positioned on one side of the discharging direction of the discharging pressing plate.

In this embodiment, on base 1 ejection of compact direction, the side of ejection of compact clamp plate is installed and is unloaded hammer 37, and the drive arrangement who unloads hammer 37 is flexible actuating mechanism such as cylinder hydro-cylinder etc. and the hammer 37 of unloading can exert the hammering to the material part after shearing, can solve to cut the condition emergence that thoroughly causes not blanking, promotes the stability and the continuity of whole equipment.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A longitudinal and transverse shearing combined unit comprises a feeding mechanism arranged on a base (1), an upper shearing die and a lower shearing die, wherein the upper shearing die and the lower shearing die are arranged in the discharging direction of the feeding mechanism, and the upper shearing die comprises a lifting structure and an upper die base (2) arranged on the lifting structure, a plurality of transverse cutters (3) and longitudinal cutters (4) are arranged on the upper die base (2) in an array sliding manner, and the transverse cutters (3) and the longitudinal cutters (4) have sliding freedom degrees in the vertical direction;

the upper die holder (2) is provided with a plurality of hydraulic holes (5), the transverse cutter (3) and the longitudinal cutter (4) are arranged in the hydraulic holes (5) in a sliding mode, the transverse cutter (3) and the longitudinal cutter (4) comprise a cutter holder (6) and a cutting edge (7) connected with the cutter holder (6), the cutter holder (6) is arranged in the hydraulic holes (5) in a sliding mode, the cutter holder (6) is provided with a partition plate (8), the partition plate (8) divides the hydraulic holes (5) into a pushing cavity (9) and a reset cavity (10), the hydraulic die holder further comprises a hydraulic system and a reset spring (11), the hydraulic system is communicated with the pushing cavity (9), and the reset spring (11) is arranged in the reset cavity (10) and used for enabling the transverse cutter (3) and the longitudinal cutter (4) to slide in a reciprocating mode in the vertical direction;

the hydraulic system comprises a pressurizing system and a pressure relief system which are communicated with the propelling cavity (9), the pressurizing system comprises an oil inlet (12) arranged on the upper die base (2) and an oil storage cavity (13) communicated with the oil inlet (12), the oil storage cavity (13) is communicated with all the hydraulic holes (5), and the hydraulic system further comprises a first hydraulic valve (14), and the first hydraulic valve (14) is arranged at the inlet end of the propelling cavity (9).

2. The cross-shear combination unit of claim 1, wherein the pressure relief system comprises a second hydraulic valve (15) and a pressure relief oil passage (16) communicated with the propulsion chamber (9), and the second hydraulic valve (15) is arranged at the oil outlet end of the propulsion chamber (9).

3. The cross shear combination unit of claim 1, wherein the feeding mechanism comprises an unwinding roller (17) and a conveying nip roller, the conveying nip roller comprises an upper nip roller (18) and a lower nip roller (19), the cross shear combination unit further comprises a roller spacing lifting device, the roller spacing lifting device comprises a bearing seat (20) arranged on the base (1) in a sliding manner, a push rod (21) connected with the bearing seat (20) and a first lifting cylinder (22), and the output end of the first lifting cylinder (22) is connected with the push rod (21).

4. The cross shear combination unit as claimed in claim 1, wherein the lifting structure comprises a lifting frame (23) and a driving device, the lifting frame (23) is slidably arranged on the base (1), the upper die holder (2) is arranged on the lifting frame (23), the lifting frame (23) is provided with a rectangular frame (24), the driving device comprises a driving motor (25) and a cam (26) connected with the output end of the driving motor (25), the cam (26) is rotatably arranged in the rectangular frame (24), and the rectangular frame (24) is tangent to the cam (26).

5. The cross shear combination unit as claimed in claim 4, further comprising a feeding pressure plate and a discharging pressure plate which are arranged on the lifting frame (23), wherein the feeding pressure plate is arranged on the feeding side of the upper die holder (2), the discharging pressure plate is arranged on the discharging side of the upper die holder (2), the feeding pressure plate comprises a first fixing rod (27) arranged on the lifting frame (23) and a first pressing plate (28) arranged on the first fixing rod (27) in a sliding manner, a first spring (29) is sleeved on the first fixing rod (27), one end of the first spring acts on the lifting frame (23), and the other end of the first spring acts on the first pressing plate (28).

6. The cross shear combination unit as claimed in claim 5, wherein the discharging pressure plate comprises a second fixing rod (30) arranged on the lifting frame (23) and a second pressing plate (31) arranged on the second fixing rod (30) in a sliding manner, a second spring (32) is sleeved on the second fixing rod (30), one end of the second spring acts on the lifting frame (23), and the other end of the second spring acts on the second pressing plate (31);

the automatic discharging device is characterized by further comprising a discharging supporting plate (33) arranged on the base (1) in a sliding mode, and a bearing surface of the discharging supporting plate (33) is provided with an exhaust hole (34).

7. The cross-shearing and cross-shearing combined unit as claimed in claim 6, further comprising a moving plate (35) arranged on the base (1) in a sliding manner and an adjusting cylinder (36) arranged on the moving plate (35), wherein the discharging supporting plate (33) is arranged on the telescopic end of the adjusting cylinder (36).

8. The cross shear combination as claimed in claim 5, further comprising a discharge hammer (37) disposed on the base (1) on one side of the discharge direction of the discharge platen.