CN114535693A

CN114535693A - Numerical control blade gap adjusting mechanism for plate shearing machine

Info

Publication number: CN114535693A
Application number: CN202210447576.7A
Authority: CN
Inventors: 夏雪锋; 徐白云
Original assignee: Jiangsu Pushang Precision Manufacturing Technology Co ltd
Current assignee: Jiangsu Pushang Precision Manufacturing Technology Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-05-27

Abstract

The invention discloses a numerical control blade gap adjusting mechanism for a plate shearing machine, which specifically comprises: the fixing frame is provided with positioning grooves on two sides of the inner wall of the fixing frame, and the inner wall of each positioning groove is fixedly connected with a guide device; the bottom of the tool rest is fixedly connected with a tool fixing seat, and two sides of the tool rest are fixedly connected with a guide device; the limiting device is arranged on the fixing frame, and one side of the limiting device is close to the tool rest and is in sliding connection with the side face of the tool rest; the lifting device is arranged at the top of the tool rest, and the top of the lifting device is fixedly connected with the top of the inner wall of the fixing frame; the guide device includes: the invention relates to the technical field of plate shearing machines, in particular to a guide slideway, wherein the inner wall of the guide slideway is connected with a limiting block in a sliding manner. This plate shearing numerical control blade clearance adjustment mechanism conveniently avoids the clearance between last cutter and the lower tool to distribute unevenly, can avoid the slope of panel section, can effectively reduce the slope degree of knife rest, strengthens the anti tilting capability of knife rest.

Description

Numerical control blade gap adjusting mechanism for plate shearing machine

Technical Field

The invention relates to the technical field of plate shearing machines, in particular to a numerical control blade gap adjusting mechanism for a plate shearing machine.

Background

The plate shearing machine is a machine for shearing plates by using a blade to do reciprocating linear motion relative to another blade, applies shearing force to metal plates with various thicknesses by means of a moving upper blade and a fixed lower blade and adopting a reasonable blade gap to break and separate the plates according to required sizes, belongs to one of forging machines, mainly plays a role in metal processing industry, and is widely applied to industries such as aviation, light industry, metallurgy, chemical industry, building, ships, automobiles, electric power, electric appliances, decoration and the like to provide required special machinery and complete equipment. The blade clearance adjusting mechanism used in the numerical control plate shearing machine has lower capability of resisting transverse impact load, and the upper blade and the lower blade are not parallel when the numerical control plate shearing machine is used, so that the clearance distribution of the upper blade and the lower blade is not uniform, and the condition that the section of a plate is inclined is caused.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a numerical control blade gap adjusting mechanism for a plate shearing machine, which solves the problem that the blade gap adjusting mechanism used in the numerical control plate shearing machine has low capability of resisting transverse impact load, and the upper blade and the lower blade are not parallel when in use, so that the gap distribution of the upper blade and the lower blade is not uniform, and the section of a plate is inclined.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a plate shearing numerical control blade clearance adjustment mechanism specifically includes:

the fixing frame is provided with positioning grooves on two sides of the inner wall of the fixing frame, and the inner wall of each positioning groove is fixedly connected with a guide device;

the bottom of the tool rest is fixedly connected with a tool fixing seat, and two sides of the tool rest are fixedly connected with a guide device;

the limiting device is arranged on the fixing frame, and one side of the limiting device is close to the tool rest and is in sliding connection with the side face of the tool rest;

the lifting device is arranged at the top of the tool rest, and the top of the lifting device is fixedly connected with the top of the inner wall of the fixing frame;

the guide device includes:

the inner wall of the guide slideway is connected with a limiting block in a sliding manner, and one side of the limiting block is fixedly connected with a hydraulic push rod;

the limiting slide way is provided with limiting grooves on two sides of the inner wall of the limiting slide way, and the limiting grooves are provided with a plurality of groups and are uniformly distributed in the limiting slide way;

the limiting sliding plate is fixedly connected with one side of the limiting sliding plate, and the two sides of the limiting sliding plate are fixedly connected with limiting strips matched with the limiting grooves.

When the device is used, the limiting block is pushed to move through the hydraulic push rod, the limiting block drives the guide slide way and the limiting slide plate to move while moving, the guide slide way drives the knife rest to move while moving, the knife rest drives the knife to move through the knife fixing seat, meanwhile, the limiting slide plate drives the limiting strip to slide in the limiting groove, the limiting slide plate and the limiting strip are arranged, the limiting block and the knife rest can be limited during longitudinal movement, the knife rest is prevented from inclining, the knife rest can be enabled to move in parallel all the time, the upper knife can be always kept in parallel with the lower knife, uneven distribution of gaps between the upper knife and the lower knife is conveniently avoided, the inclination of the section of a plate can be avoided, the limiting strip comprises a rectangular body and a cylinder, the shape of the inner wall of the limiting groove in the limiting slide way is matched with the shape of the limiting strip, and the contact area between the limiting slide way can be increased through the matching of the limiting strip and the limiting groove, the antitorque commentaries on classics ability between convenient increase spacing slide and the spacing slide to effectively reduce the inclination of knife rest, strengthen the anti inclination ability of knife rest.

Preferably, one side of the guide slide way, which is far away from the limiting block, is fixedly connected with the side face of the tool rest, and the limiting slide way is arranged inside the positioning groove and fixedly connected with the inner wall of the positioning groove through a bolt.

Preferably, the limiting strip comprises a rectangular body and a cylinder, the rectangular body inside the limiting strip is fixedly connected with the limiting sliding plate, and one side, far away from the limiting sliding plate, of the rectangular body inside the limiting strip is fixedly connected with the cylinder.

Preferably, the limiting sliding plate extends to the inside of the limiting slide way and is in sliding connection with the inner wall of the limiting slide way, and the limiting strips are provided with a plurality of groups and are in one-to-one correspondence with the limiting grooves respectively.

Preferably, stop device includes spacing post, the groove of accomodating has all been seted up at spacing post both ends, it has locking piston to accomodate inslot wall sliding connection, locking piston one end extends to accomodate the groove outside and fixedly connected with rotates the seat, it runs through and sliding connection has the gauge rod to rotate the seat side.

Preferably, the end of the locking piston, which is far away from the accommodating groove, penetrates through the fixing frame and is in sliding connection with the fixing frame, a sliding hole matched with the locking piston is formed in the side face of the fixing frame, the limiting column and the rotating seat are respectively arranged inside and outside the fixing frame, and a friction pad is arranged on one side, which is close to the fixing frame, of the rotating seat.

Preferably, the receiving groove is filled with a thermal expansion medium, and a heating wire is disposed in a portion of the receiving groove located inside the thermal expansion medium.

Preferably, one end of the detection rod is rotatably connected with the side face of the fixing frame through a rotating bolt, and an arc-shaped scale mark is arranged at the side face of the fixing frame and the position, matched with one end, far away from the rotating bolt, of the detection rod.

The tool rest is provided with a limiting device, when the tool rest drives the tool to move to a proper position, an electric heating wire in the limiting device is electrified, the electric heating wire heats a thermal expansion medium in the accommodating groove after being heated, the thermal expansion medium is heated to expand to push the locking piston to move towards the outside of the accommodating groove, so that the rotating seat is driven to release the limiting column from the fixing frame, the limiting column is moved to be tightly attached to one side of the tool rest, the limiting column drives the locking piston and the rotating seat to move, the rotating seat drives the detection rod to rotate around the rotating bolt and finally point to a scale, then the electric heating wire is powered off, the thermal expansion medium contracts after being cooled and drives the rotating seat to be tightly pressed on the fixing frame through the locking piston, when the tool rest is subjected to transverse load to generate deviation, the limiting column is driven to move, the limiting column drives the detection rod to rotate through the locking piston and the rotating seat, and the arranged detection rod can convert small position change on the tool rest into large position change on the detection rod through a lever principle, make things convenient for the staff in time to discover cutter offset, can in time adjust, avoid producing the great waste material of error to be provided with and accomodate groove and heating wire, the accessible is accomodate the position that the seat was rotated in the control of the thermal energy medium of inslot portion, conveniently through rotating the seat with spacing post fixed column, the position that the vibrations of avoiding the machine operation in-process to produce lead to spacing post produces the skew, ensures the accuracy that the measuring stick detected, uses safe and reliable.

Preferably, hoisting device includes the pneumatic cylinder, pneumatic cylinder top fixedly connected with longitudinal slide, pneumatic cylinder bottom fixedly connected with stationary dog, pneumatic cylinder bottom outside cover is established and fixedly connected with detection device, longitudinal slide top and mount inner wall top fixed connection, stationary dog bottom and knife rest fixed connection are provided with hoisting device, the inside longitudinal slide that is provided with of hoisting device, and accessible longitudinal slide drives the removal that the pneumatic cylinder adapted knife rest to be provided with the stationary dog, through the longer claw arm centre gripping knife rest of stationary dog, make the knife rest can be in same vertical direction with the pneumatic cylinder, avoid the knife rest and the cutter on it to produce the skew.

Preferably, the detection device comprises a fixing ring, the fixing ring is sleeved at the bottom of the hydraulic cylinder and fixedly connected with the hydraulic cylinder, the top of the fixing ring is fixedly connected with a ring pipe, one side of the ring pipe is communicated with a control pipe, the bottom of the inner wall of the control pipe is fixedly connected with an alarm, the inner wall of the control pipe is slidably connected with a control piston, the bottom of the control pipe is communicated with a detection pipe, the inner wall of the detection pipe is slidably connected with a detection piston, the bottom of the detection piston is fixedly connected with a detection rod, the bottom of the detection rod extends to the top of the fixed column, the detection device is arranged, when the fixed jaw inclines, the top of the fixed column on the inclined side upwards extrudes the detection rod, the detection rod drives the detection piston to upwards move, the detection piston upwards moves to extrude the detection pipe and hydraulic oil in the ring pipe, the hydraulic oil pushes the control piston to move towards the direction of the alarm, when the fixed claw inclines to a certain degree, the control piston extrudes the alarm and enables the alarm to give an alarm, so that a worker is reminded of overhauling the fixed claw conveniently, the shearing precision is prevented from being influenced by the fact that the fixed claw is driven to deviate at home, and the use is safe and reliable.

(III) advantageous effects

The invention provides a gap adjusting mechanism for a numerical control blade of a plate shearing machine. The method has the following beneficial effects: .

(1) This plate shearing numerical control blade clearance adjustment mechanism, promote the stopper through hydraulic push rod and remove, the stopper drives direction slide and spacing slide removal when removing, it removes to drive the knife rest when the direction slide removes, the knife rest passes through the cutter fixing base and drives the cutter removal, spacing slide drives spacing strip and slides at spacing inslot portion simultaneously, be provided with spacing slide and spacing strip, can carry on spacingly when removing stopper and knife rest longitudinal movement, avoid the knife rest to produce the slope, can make knife rest parallel translation always, make the top tool can remain parallel with the bottom tool throughout, conveniently avoid the clearance between top tool and the bottom tool to distribute unevenly, can avoid the slope of panel section.

(2) This kind of plate shearing numerical control blade clearance adjustment mechanism is provided with spacing, and spacing includes cuboid and cylinder to the inside spacing inslot wall shape of spacing slide and the shape looks adaptation of spacing, the area of contact between spacing slide of accessible and spacing groove cooperation increase and the spacing slide conveniently increases the antitorque commentaries on classics ability between spacing slide and the spacing slide, thereby effectively reduces the slope degree of knife rest, strengthens the antitorque ability of knife rest.

(3) This plate shearing numerical control blade clearance adjustment mechanism is provided with stop device, can drive spacing post when the knife rest receives transverse load to produce the skew and remove, and spacing post passes through locking piston and rotates the seat and drive the measuring rod rotation, and the measuring rod accessible lever principle of setting changes into the measuring rod on less position change on the knife rest great position change, makes things convenient for the staff in time to discover the cutter offset, can in time adjust, avoids producing the great waste material of error.

(4) This a cut board numerical control blade clearance adjustment mechanism is provided with and accomodates groove and heating wire, and the position that the seat was rotated in the thermal energy medium control of inslot portion is accomodate to the accessible, conveniently through rotating the seat with spacing post fixed column, avoids the vibrations that the machine operation in-process produced to lead to the position of spacing post to produce the skew, ensures the accuracy that the test bar detected, uses safe and reliable.

(5) This plate shearing numerical control blade clearance adjustment mechanism is provided with hoisting device, and hoisting device is inside to be provided with the longitudinal slide, and accessible longitudinal slide drives the removal that the pneumatic cylinder adapted the knife rest to be provided with the stationary dog, through the longer claw arm centre gripping knife rest of stationary dog, make the knife rest can be in same vertical direction with the pneumatic cylinder, avoid knife rest and the cutter on it to produce the skew.

(6) This plate shearing numerical control blade clearance adjustment mechanism, be provided with detection device, when the stationary dog took place the slope, the fixed column top of slope one side upwards extrudees the test bar, the test bar drives and detects piston rebound, detect the inside hydraulic oil of piston rebound extrusion test tube and annular pipe, move to the direction of alarm through hydraulic oil promotion control piston, when the stationary dog inclines to the certain degree, control piston extrusion alarm and make the alarm report to the police, conveniently remind the staff to overhaul the stationary dog, avoid arriving and drive the stationary dog skew and influence the shearing precision, safety and reliability in utilization.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the backside structure of the present invention;

FIG. 3 is a schematic view of the structure of the guiding device of the present invention;

FIG. 4 is a schematic view of the structure of the position limiting device of the present invention;

FIG. 5 is an enlarged view of part A of the present invention;

FIG. 6 is a schematic view of the lifting device of the present invention

FIG. 7 is a schematic structural diagram of a detecting device according to the present invention.

In the figure: 1. a fixed mount; 2. positioning a groove; 3. a guide device; 31. a guide slide way; 32. a limiting block; 33. a hydraulic push rod; 34. a limiting slide way; 35. a limiting groove; 36. a limiting sliding plate; 37. a limiting strip; 4. a tool holder; 5. a cutter fixing seat; 6. a limiting device; 61. a limiting column; 62. a receiving groove; 63. locking the piston; 64. a rotating seat; 65. a detection lever; 7. a lifting device; 71. a hydraulic cylinder; 72. a longitudinal slideway; 73. a fixed jaw; 74. a detection device; 741. a fixing ring; 742. an annular tube; 743. a control tube; 744. an alarm; 745. a control piston; 746. a detection tube; 747. detecting the piston; 748. a detection rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a plate shearing numerical control blade clearance adjustment mechanism specifically includes:

the fixing frame 1, the both sides of the inner wall of the fixing frame 1 are equipped with the locating slot 2, the inner wall of the locating slot 2 is fixedly connected with the guiding device 3;

the bottom of the tool rest 4 is fixedly connected with a tool fixing seat 5, and two sides of the tool rest 4 are fixedly connected with the guide device 3;

the limiting device 6 is arranged on the fixed frame 1, and one side of the limiting device 6 is close to the tool rest 4 and is in sliding connection with the side surface of the tool rest 4;

the lifting device 7 is arranged at the top of the tool rest 4, and the top of the lifting device 7 is fixedly connected with the top of the inner wall of the fixed frame 1;

the guide device 3 includes:

the inner wall of the guide slideway 31 is connected with a limiting block 32 in a sliding manner, and one side of the limiting block 32 is fixedly connected with a hydraulic push rod 33;

the limiting slide way 34 is provided with limiting grooves 35 on two sides of the inner wall of the limiting slide way 34, and the limiting grooves 35 are provided with a plurality of groups and are uniformly distributed in the limiting slide way 34;

and one side of the limiting sliding plate 36 is fixedly connected with the limiting block 32, and both sides of the limiting sliding plate 36 are fixedly connected with limiting strips 37 matched with the limiting grooves 35.

When the plate cutting machine is used, the limiting block 32 is pushed to move through the hydraulic push rod 33, the limiting block 32 drives the guide slide way 31 and the limiting slide plate 36 to move while moving, the guide slide way 31 drives the knife rest 4 to move while moving, the knife rest 4 drives the knife to move through the knife fixing seat 5, meanwhile, the limiting slide plate 36 drives the limiting strip 37 to slide in the limiting groove 35, the limiting slide plate 36 and the limiting strip 37 are arranged, the limiting block 32 and the knife rest 4 can be limited during longitudinal movement, the knife rest 4 is prevented from inclining, the knife rest 4 can always move in parallel, the upper knife can always keep parallel with the lower knife, uneven gap distribution between the upper knife and the lower knife is conveniently avoided, the plate section can be prevented from inclining, the limiting strip 37 is arranged, the limiting strip 37 comprises a rectangular body and a cylinder, and the shape of the inner wall of the limiting groove 35 in the limiting slide way 34 is matched with the shape of the limiting strip 37, the contact area between spacing slide 36 of accessible 37 and the spacing groove 35 cooperation increase spacing slide 36 and the spacing slide 34 conveniently increases the antitorque commentaries on classics ability between spacing slide 36 and the spacing slide 34 to effectively reduce the degree of inclination of knife rest 4, strengthen knife rest 4's anti tilting capability.

Example two:

referring to fig. 1-5, the present invention provides a technical solution based on the first embodiment: stop device 6 includes spacing post 61, spacing post 61 both ends have all been seted up and have been accomodate groove 62, it has locking piston 63 to accomodate groove 62 inner wall sliding connection, locking piston 63 one end extends to accomodate the groove 62 outside and fixedly connected with rotates seat 64, it runs through and sliding connection has detection lever 65 to rotate the seat 64 side, locking piston 63 keeps away from the one end of accomodating groove 62 and runs through mount 1 and with mount 1 sliding connection, mount 1 side is seted up the slide opening with locking piston 63 looks adaptation, spacing post 61 and rotation seat 64 set up respectively in the inside and the outside of mount 1, it is provided with the friction pad to rotate one side that seat 64 is close to mount 1, it has the thermal expansion medium to accomodate the inside packing of groove 62, the inside part that is located the thermal expansion medium of accomodating groove 62 is provided with the heating wire, detection lever 65 one end is rotated through rotating the bolt and is connected with mount 1 side, the position of keeping away from the one end looks adaptation of rotating bolt on mount 1 side and the detection lever 65 is provided with the arc scale mark line.

The limiting device 6 is arranged, when the tool rest 4 drives the tool to move to a proper position, an electric heating wire inside the limiting device 6 is electrified, the electric heating wire heats a thermal expansion medium inside the accommodating groove 62 after being heated, the thermal expansion medium is heated to expand to push the locking piston 63 to move towards the outside of the accommodating groove 62, so that the rotating seat 64 is driven to release the limiting column 61 from the fixed frame 1, the limiting column 61 is moved to be attached to one side of the tool rest 4, the limiting column 61 drives the locking piston 63 and the rotating seat 64 to move, the rotating seat 64 drives the detection rod 65 to rotate around the rotating bolt and finally point to a scale, then the electric heating wire is powered off, the thermal expansion medium is cooled and then contracted, the rotating seat 64 is driven to be tightly pressed on the fixed frame 1 through the locking piston 63, the limiting column 61 is driven to move when the tool rest 4 is subjected to transverse load to generate deviation, the limiting column 61 drives the detection rod 65 to rotate through the locking piston 63 and the rotating seat, the detection pole 65 accessible lever principle that sets up changes into the great position change on the detection pole 65 with less position change on the knife rest 4, make things convenient for the staff in time to discover the cutter offset, can in time adjust, avoid producing the great waste material of error, and be provided with and accomodate groove 62 and heating wire, the position that seat 64 was rotated in the inside thermal energy medium control in groove 62 is accomodate to the accessible, conveniently through rotating seat 64 with spacing post 61 fixed column, the vibrations of avoiding machine operation in-process to produce lead to spacing post 61's position to produce the skew, ensure the accuracy that detection pole 65 detected, use safe and reliable.

Example three:

referring to fig. 1-7, the present invention provides a technical solution based on the first embodiment and the second embodiment: lifting device 7 includes pneumatic cylinder 71, pneumatic cylinder 71 top fixedly connected with longitudinal slide 72, pneumatic cylinder 71 bottom fixedly connected with stationary dog 73, longitudinal slide 72 top and the fixed frame 1 inner wall top fixed connection, stationary dog 73 bottom and knife rest 4 fixed connection, be provided with lifting device 7, lifting device 7 is inside to be provided with longitudinal slide 72, accessible longitudinal slide 72 drives the removal that pneumatic cylinder 71 adapts to knife rest 4, and be provided with stationary dog 73, through the longer claw arm centre gripping knife rest 4 of stationary dog 73, make knife rest 4 can be in same vertical direction with pneumatic cylinder 71, avoid knife rest 4 and the cutter on it to produce the skew.

The detection device 74 comprises a fixing ring 741, the fixing ring 741 is sleeved at the bottom of the hydraulic cylinder 71 and fixedly connected with the hydraulic cylinder 71, an annular tube 742 is fixedly connected with the top of the fixing ring 741, one side of the annular tube 742 is communicated with a control tube 743, the bottom of the inner wall of the control tube 743 is fixedly connected with an alarm 744, the inner wall of the control tube 743 is slidably connected with a control piston 745, the bottom of the control tube 743 is communicated with a detection tube 746, the inner wall of the detection tube 746 is slidably connected with a detection piston 747, the bottom of the detection piston 747 is fixedly connected with a detection rod 748, the bottom of the detection rod 748 extends to the top of the fixed column 73, the detection device 74 is arranged, when the fixed claw 73 inclines, the top of the fixed column 73 on the inclined side upwards extrudes the detection rod, the detection piston 747 is driven by the detection rod 748 to upwards move, the detection piston 747 extrudes hydraulic oil in the detection tube 746 and the annular tube 742, the control piston 745 is driven by the hydraulic oil to move towards the direction of the alarm 744, when stationary dog 73 inclines to a certain degree, control piston 745 extrusion alarm 744 and make alarm 744 report to the police, conveniently remind the staff to overhaul stationary dog 73, avoid arriving 4 and drive stationary dog 73 skew and influence shearing precision, use safe and reliable.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plate shearing numerical control blade clearance adjustment mechanism specifically includes:

the fixing frame (1), both sides of the inner wall of the fixing frame (1) are provided with positioning grooves (2), and the inner wall of each positioning groove (2) is fixedly connected with a guide device (3);

the bottom of the tool rest (4) is fixedly connected with a tool fixing seat (5), and two sides of the tool rest (4) are fixedly connected with the guide device (3);

the limiting device (6) is arranged on the fixed frame (1), and one side of the limiting device (6) is close to the tool rest (4) and is in sliding connection with the side surface of the tool rest (4);

the lifting device (7) is arranged at the top of the tool rest (4), and the top of the lifting device (7) is fixedly connected with the top of the inner wall of the fixed frame (1);

the plate shearing numerical control blade gap adjusting mechanism is characterized in that: the guiding device (3) comprises:

the device comprises a guide slideway (31), a limiting block (32) is connected to the inner wall of the guide slideway (31) in a sliding manner, and a hydraulic push rod (33) is fixedly connected to one side of the limiting block (32);

the limiting device comprises a limiting slide way (34), limiting grooves (35) are formed in two sides of the inner wall of the limiting slide way (34), and a plurality of groups of limiting grooves (35) are uniformly distributed in the limiting slide way (34);

one side of the limiting sliding plate (36) is fixedly connected with the limiting block (32), and both sides of the limiting sliding plate (36) are fixedly connected with limiting strips (37) matched with the limiting grooves (35);

the limiting device (6) comprises a limiting column (61), two ends of the limiting column (61) are respectively provided with a containing groove (62), the inner wall of each containing groove (62) is connected with a locking piston (63) in a sliding mode, one end of each locking piston (63) extends to the outside of each containing groove (62) and is fixedly connected with a rotating seat (64), and the side face of each rotating seat (64) is connected with a detection rod (65) in a penetrating and sliding mode;

one end, far away from the accommodating groove (62), of the locking piston (63) penetrates through the fixing frame (1) and is in sliding connection with the fixing frame (1), a sliding hole matched with the locking piston (63) is formed in the side face of the fixing frame (1), the limiting column (61) and the rotating seat (64) are respectively arranged inside and outside the fixing frame (1), and a friction pad is arranged on one side, close to the fixing frame (1), of the rotating seat (64);

the accommodating groove (62) is filled with a thermal expansion medium, and the part of the accommodating groove (62) positioned in the thermal expansion medium is provided with an electric heating wire;

detection pole (65) one end is rotated through rotating to tie and be connected with mount (1) side, the position of keeping away from the one end looks adaptation that rotates the bolt on mount (1) side and detection pole (65) is provided with the arc scale mark.

2. The numerical control blade gap adjusting mechanism for the plate shearing machine according to claim 1, characterized in that: one side of the guide slide way (31) far away from the limiting block (32) is fixedly connected with the side face of the tool rest (4), and the limiting slide way (34) is arranged inside the positioning groove (2) and fixedly connected with the inner wall of the positioning groove (2) through a bolt.

3. The numerical control blade gap adjusting mechanism for the plate shearing machine according to claim 1, characterized in that: spacing strip (37) include cuboid and cylinder two parts, the cuboid and spacing slide (36) fixed connection of inside of spacing strip (37), keep away from one side and cylinder fixed connection of spacing slide (36) on the cuboid of inside of spacing strip (37).

4. The numerical control blade gap adjusting mechanism for the plate shearing machine according to claim 1, characterized in that: spacing slide (36) extend to inside and with spacing slide (34) inner wall sliding connection of spacing slide (34), spacing strip (37) are provided with the multiunit and respectively with spacing groove (35) one-to-one.

5. The numerical control blade gap adjusting mechanism for the plate shearing machine according to claim 1, characterized in that: lifting device (7) include pneumatic cylinder (71), pneumatic cylinder (71) top fixedly connected with longitudinal slide (72), pneumatic cylinder (71) bottom fixedly connected with stationary dog (73), pneumatic cylinder (71) bottom outside cover is established and fixedly connected with detection device (74), longitudinal slide (72) top and mount (1) inner wall top fixed connection, stationary dog (73) bottom and knife rest (4) fixed connection.

6. The numerical control blade gap adjusting mechanism for the plate shearing machine according to claim 5, characterized in that: the detection device (74) comprises a fixing ring (741), the fixing ring (741) is sleeved at the bottom of the hydraulic cylinder (71) and fixedly connected with the hydraulic cylinder (71), the top of the fixing ring (741) is fixedly connected with a ring tube (742), one side of the ring tube (742) is communicated with a control tube (743), the bottom of the inner wall of the control tube (743) is fixedly connected with an alarm (744), the inner wall of the control tube (743) is slidably connected with a control piston (745), the bottom of the control tube (743) is communicated with a detection tube (746), the inner wall of the detection tube (746) is slidably connected with a detection piston (747), the bottom of the detection piston (747) is fixedly connected with a detection rod (748), the bottom of the detection rod (748) extends to the top of a fixing column (73), and hydraulic oil is filled in the ring tube (742) and the detection tube (746).