CN111745173A

CN111745173A - High-precision continuous punching device

Info

Publication number: CN111745173A
Application number: CN202010523341.2A
Authority: CN
Inventors: 李玉盛
Original assignee: Guangzhou Songbin Engineering Technology Co Ltd
Current assignee: Guangzhou Songbin Engineering Technology Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-10-09

Abstract

The invention relates to a high-precision continuous punching device, which comprises a support, a punching mechanism, a positioning mechanism, a conveying mechanism and a clamping mechanism, wherein the punching mechanism is arranged on a cross rod, the conveying mechanism is arranged on a support rod, the clamping mechanism is arranged right below the punching mechanism, the positioning mechanism comprises a moving assembly and a clamping assembly, the high-precision continuous punching device realizes punching through the punching mechanism, the conveying mechanism is positioned through the positioning mechanism, so that the workpiece on a conveying belt is positioned, the workpiece is clamped through the clamping mechanism, the punching precision is improved, compared with the existing punching device, the device realizes the linkage of punching, conveying and clamping of the workpiece through an output source, the energy is saved, compared with the existing positioning mechanism, the positioning mechanism adopts a pure mechanical structure, and the use of a sensor is avoided, the service life is prolonged, and the stability of the mechanism is improved.

Description

High-precision continuous punching device

Technical Field

The invention relates to a high-precision continuous punching device.

Background

The punching is an operation of processing holes on a solid material by using a drill bit, when batch punching is needed, punching is generally carried out by using a punching machine, the material is moved to a camera scanning area of the automatic punching machine firstly, the camera scans an image and then processes the image and sends a signal to a control part, the control part receives the signal and then further processes the image and controls a transmission part to act, so that a punch moves along an X axis and a Y axis on a plane, a pneumatic part starts to work after the movement is finished, and a solenoid valve controls an air cylinder to carry out punching action to finish punching.

When the existing punching device is used, conveying, positioning and clamping of workpieces need different output sources to operate, the structure is complex, and energy is wasted.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the continuous punching device with high precision is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a high-precision continuous punching device comprises a support, a punching mechanism, a positioning mechanism, a conveying mechanism and a clamping mechanism, wherein the supporting rods comprise a base, two supporting rods and a cross rod, the two supporting rods are respectively arranged at two ends of the base, the cross rod is arranged above the base through the two supporting rods, the punching mechanism is arranged on the cross rod, the conveying mechanism is arranged on the supporting rods, the clamping mechanism is arranged under the punching mechanism, and the positioning mechanism comprises a moving assembly and a clamping assembly;

the punching mechanism comprises an air cylinder, a moving block and a drill bit, wherein the air cylinder is vertically downwards arranged on the cross rod, the moving block is arranged on an air rod of the air cylinder, and the drill bit is vertically downwards arranged on the moving block;

the conveying mechanism comprises two rollers and two conveying belts, the two rollers are respectively arranged on the two supporting rods, the conveying belts are arranged on the two rollers, the conveying belts are provided with a plurality of through holes, and the through holes are uniformly formed;

the moving assembly comprises a fixed rod, a push rod, a stop lever, a first limit block and a second limit block, the fixed rod is arranged on one side of the moving block, the push rod is arranged at one end, away from the moving block, of the fixed rod, one end of the push rod is hinged with the fixed rod, a torsion spring is arranged at the hinged position of the push rod and the fixed rod, one end, away from the fixed rod, of the push rod is arranged opposite to one of the through holes in the conveying belt, the stop lever is arranged on the moving block, the baffle is positioned below the fixed rod, one end, away from the moving block, of the stop lever abuts against the push rod, the length of the stop lever is smaller than that of the fixed rod, the first limit block and the second limit block are both positioned below the conveying belt, the first limit block is positioned under the push rod, the second limit block is positioned below the first limit block, the cross section of the first limit block, the section of the second limiting block is rectangular, and the length of the rectangle of the section of the second limiting block is equal to the length of the lower bottom of the right trapezoid of the section of the first limiting block;

the clamping assembly comprises a sleeve, a push plate, a clamping block, a connecting rod and a first spring, the sleeve is arranged on the base, the push plate is arranged in the sleeve, the push plate is connected with the sleeve in a sliding mode, a round hole is formed in the top of the sleeve, the clamping block is located at the round hole and is hemispherical, the diameter of the clamping block is larger than that of the round hole, the clamping block is located in one of the through holes in the conveying belt, the clamping block is connected with the push plate through the connecting rod, the first spring is arranged in the sleeve, one end of the first spring is connected with the push plate, the other end of the first spring is connected with the bottom of the sleeve, and the first spring is in a compressed state;

the clamping mechanism comprises two fixing plates, a first clamping plate, a second clamping plate, a limiting rod, two second springs, two L rods and a pull rope, the two fixing plates are respectively arranged at two sides of the conveying belt, the first clamping plate and the second clamping plate are both arranged between the two fixing plates, the first clamping plate and the second clamping plate are respectively positioned at two sides of the conveying belt, two ends of the limiting rod are respectively connected with the two fixing plates, the limiting rod penetrates through the first clamping plate and the second clamping plate, the first clamping plate is fixedly connected with the limiting rod, the second clamping plate is in sliding connection with the limiting rod, the second springs are sleeved on the limiting rod, the second springs are positioned between the fixing plates and the second clamping plate, one end of each second spring is connected with the fixing plates, the other end of each second spring is connected with the second clamping plate, the L rods are two, and the two L rods are respectively arranged on the first clamping plate and the second clamping plate, the pull rope is arranged at one end, far away from the first clamping plate, of the L-shaped rod, two ends of the pull rope are respectively connected with the two L-shaped rods, and the pull rope is located on one side, far away from the first clamping plate, of the push rod.

In order to realize better location effect to the conveyer belt, the screens subassembly has two, and two screens subassemblies set up respectively at the both ends of conveyer belt.

In order to better limit the movement of the second clamping block, the two limiting rods are arranged, the two limiting rods are respectively arranged at two ends of the first clamping block, the two second springs are arranged, and the two second springs are respectively sleeved on the two limiting rods.

In order to support the workpiece, when the workpiece is prevented from being punched, the workpiece is shaken up and down due to the flexibility of the conveying belt, a bearing block is arranged below the conveying belt and is located under the drill bit.

In order to limit the movement of the push plate, a slide rod is arranged in the sleeve and penetrates through the push plate, and the slide rod is connected with the push plate in a sliding mode.

In order to better limit the movement of the push plate, the two slide rods are arranged at two ends of the push plate respectively.

In order to reduce friction, one end, away from the moving block, of the stop lever is provided with a protrusion, and the protrusion abuts against the push rod.

In order to reduce friction, one end of the push rod, which is far away from the fixed rod, is provided with a roller.

In order to avoid the contact between the drill bit and the workpiece and the conveying state of the conveyor belt, the thickness of the first limiting block is smaller than the minimum distance from the drill bit to the workpiece.

In order to avoid the drill bit from contacting the conveyor belt, the minimum distance between the drill bit and the conveyor belt is larger than the maximum distance extending out of the air rod of the air cylinder.

The continuous punching device with high precision has the advantages that punching is realized through the punching mechanism, the conveying mechanism is positioned through the positioning mechanism, so that workpieces on the conveying belt are positioned, the workpieces are clamped through the clamping mechanism, the punching precision is improved, compared with the existing punching device, the device realizes linkage of punching, conveying and clamping of the workpieces through one output source, energy is saved, compared with the existing positioning mechanism, the positioning mechanism adopts a pure mechanical structure, the use of a sensor is avoided, the service life is prolonged, and the stability of the mechanism is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view showing the structure of a high-precision continuous punching apparatus according to the present invention;

FIG. 2 is a schematic view showing the structure of a conveying mechanism of the high-precision continuous punching apparatus according to the present invention;

FIG. 3 is a schematic view of the positioning assembly of the high precision continuous hole punch apparatus of the present invention;

FIG. 4 is a schematic structural view of a clamping mechanism of the high-precision continuous punching device according to the present invention;

in the figure: 1. the automatic feeding device comprises a base, 2 parts of a support rod, 3 parts of a cross rod, 4 parts of an air cylinder, 5 parts of a moving block, 6 parts of a drill bit, 7 parts of a roller, 8 parts of a conveyor belt, 9 parts of a fixing rod, 10 parts of a push rod, 11 parts of a stop lever, 12 parts of a first stop block, 13 parts of a second stop block, 14 parts of a sleeve, 15 parts of a push plate, 16 parts of a clamping block, 17 parts of a connecting rod, 18 parts of a first spring, 19 parts of a fixing plate, 20 parts of a first clamping plate, 21 parts of a second clamping plate, 22 parts of a stop lever, 23 parts of a second spring, 24 parts of an L rod, 25 parts.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a high-precision continuous punching device comprises a support, a punching mechanism, a positioning mechanism, a conveying mechanism and a clamping mechanism, wherein the supporting rod 2 comprises a base 1, two supporting rods 2 and two cross rods 3, the two supporting rods 2 are respectively arranged at two ends of the base 1, the cross rods 3 are arranged above the base 1 through the two supporting rods 2, the punching mechanism is arranged on the cross rods 3, the conveying mechanism is arranged on the supporting rods 2, the clamping mechanism is arranged right below the punching mechanism, and the positioning mechanism comprises a moving assembly and a clamping assembly;

the workpiece is placed on the conveying belt 8, punching is realized through the punching mechanism, the moving assembly is driven to move through the punching mechanism, the moving assembly drives the conveying mechanism to move, the workpiece is moved to the position below the punching mechanism, meanwhile, the clamping assembly clamps the conveying belt 8 to avoid the deviation of the workpiece, the workpiece is clamped through the clamping mechanism driven by the moving assembly, the punching precision is improved,

as shown in fig. 1, the punching mechanism comprises a cylinder 4, a moving block 5 and a drill 6, wherein the cylinder 4 is vertically arranged on the cross rod 3 downwards, the moving block 5 is arranged on an air rod of the cylinder 4, and the drill 6 is vertically arranged on the moving block 5 downwards;

the air cylinder 4 is operated, the air rod of the air cylinder 4 extends to drive the moving block 5 to move, and the moving block 5 drives the drill bit 6 to move, so that the drill bit 6 punches the workpiece.

As shown in fig. 2, the conveying mechanism comprises two rollers 7 and two conveying belts 8, the two rollers 7 are respectively arranged on the two supporting rods 2, the conveying belts 8 are arranged on the two rollers 7, the conveying belts 8 are provided with a plurality of through holes, and the through holes are uniformly arranged;

here the conveyor belt 8 is tensioned by two rollers 7, the movement of the conveyor belt 8 drives the two rollers 7 to rotate, the air rod elongation drives the movement assembly to operate, and the movement assembly drives the conveyor belt 8 to move and the conveyor belt 8 to move.

In order to support the workpiece and avoid the situation that the workpiece shakes up and down due to the flexibility of the conveyor belt 8 during punching, a bearing block 26 is arranged below the conveyor belt 8, and the bearing block 26 is located right below the drill bit 6.

As shown in fig. 1, the moving assembly includes a fixed rod 9, a push rod 10, a stop lever 11, a first stop block 12 and a second stop block 13, the fixed rod 9 is disposed at one side of the moving block 5, the push rod 10 is disposed at one end of the fixed rod 9 away from the moving block 5, one end of the push rod 10 is hinged to the fixed rod 9, a torsion spring is disposed at the hinge of the push rod 10 and the fixed rod 9, one end of the push rod 10 away from the fixed rod 9 is disposed opposite to one of the through holes on the conveyor belt 8, the stop lever 11 is disposed on the moving block 5, the stop plate is disposed below the fixed rod 9, one end of the stop lever 11 away from the moving block 5 abuts against the push rod 10, the length of the stop lever 11 is less than that of the fixed rod 9, the first stop block 12 and the second stop block 13 are both disposed below the conveyor belt 8, the first, the second limiting block 13 is positioned below the first limiting block 12, the cross section of the first limiting block 12 is a right trapezoid, the upper bottom of the right trapezoid of the cross section of the first limiting block 12 abuts against the transmission belt, the cross section of the second limiting block 13 is rectangular, and the length of the rectangle of the cross section of the second limiting block 13 is equal to the length of the lower bottom of the right trapezoid of the cross section of the first limiting block 12;

the moving block 5 moves to drive the fixed block 9 to move, the fixed block 9 drives the push rod 10 to move, so that the push rod 10 is inserted into a through hole in the conveyor belt 8, along with the continuous movement of the push rod 10, the push rod 10 can be in contact with the first fixed block, the push rod 10 moves along the inclined plane of the first fixed block, so that the inclined push rod 10 moves towards the vertical direction, as the push rod 10 passes through the through hole in the conveyor belt 8, the conveyor belt 8 drives the conveyor belt 8 to move, so that the workpiece moves to be under the drill 6, along with the continuous downward movement of the push rod 10, the push rod 10 moves to the second limit block 13, at the moment, the push plate 15 keeps a vertical state, as the second fixed block is vertical to the abutting surface of the push rod 10, at the moment, the push rod 10 can only vertically move downwards, and as the axis of the push rod, so that the workpiece is kept in a forbidden state, and the drill bit 6 can drill into the workpiece along with the continuous operation of the air cylinder 4 to realize the drilling.

Here, when the push rod 10 moves on the first stopper 12, the drill 6 is not yet in contact with the workpiece, when the push rod 10 moves onto the second stopper 13, the drill 6 is in contact with the workpiece, and the moving distance of the push rod 10 on the second stopper 13 is the punching depth.

In order to reduce friction, the end of the stop lever 11 remote from the moving block 5 is provided with a projection, which abuts against the push rod 10.

In order to reduce friction, the end of the push rod 10 remote from the fixing rod 9 is provided with a roller.

In order to avoid that the conveyor belt 8 is still in the conveying state when the drill 6 is in contact with the workpiece, the thickness of the first stopper 12 is smaller than the minimum distance from the drill 6 to the workpiece.

In order to avoid the contact between the drill bit 6 and the conveyor belt 8, the minimum distance between the drill bit 6 and the conveyor belt 8 is greater than the maximum distance that the gas rod of the cylinder 4 extends.

As shown in fig. 3, the locking assembly includes a sleeve 14, a push plate 15, a latch 16, a connecting rod 17 and a first spring 18, the sleeve 14 is disposed on the base 1, the push plate 15 is disposed in the sleeve 14, the push plate 15 is slidably connected to the sleeve 14, a circular hole is disposed at the top of the sleeve 14, the latch 16 is located at the circular hole, the latch 16 is hemispherical, the diameter of the latch 16 is greater than that of the circular hole, the latch 16 is located in one of the through holes on the conveyor belt 8, the latch 16 is connected to the push plate 15 through the connecting rod 17, the first spring 18 is disposed in the sleeve 14, one end of the first spring 18 is connected to the push plate 15, the other end of the first spring 18 is connected to the bottom of the sleeve 14, and the first spring 18 is in a compressed state;

the clamping block 16 is clamped in the through hole on the conveying belt 8, the first spring 18 is in a compressed state, restoring force of the first spring 18 generates upward thrust on the push plate 15, the push plate 15 generates upward thrust on the connecting rod 17, the connecting rod 17 generates upward thrust on the clamping block 16, as the diameter of the clamping block 16 is larger than that of the circular hole, the clamping block 16 cannot move out of the sleeve 14 and can only be clamped in the circular hole all the time, when the push rod 10 moves to the first fixing block, the conveying belt 8 moves, at the moment, the pushing force generated by the push rod 10 on the conveying belt 8 is larger than the restoring force of the first spring 18, the clamping block 16 is pressed into the sleeve 14 by the conveying belt 8, so that the conveying belt 8 moves, as the push rod 10 moves to the second limiting block 13, at the moment, the next circular hole moves to the clamping block 16, the clamping block 16 is not blocked by the conveying belt 8, fixture block 16 can pop out once more, the card is in the downthehole circle, when push rod 10 moved on first stopper 12 and the second stopper 13, the deformation takes place promptly for the torsional spring, the torsional spring produces thrust to push rod 10, owing to receive blockking of first stopper 12 and second stopper 13, push rod 10 can't remove, when punching the completion, when push rod 10 shifts up, push rod 10 receives the effect of torsional spring restoring force, will incline once more, push rod 10 produces the thrust of reverse movement to conveyer belt 8, conveyer belt 8 produces thrust to fixture block 16, because the restoring force of torsional spring is less than the restoring force of first spring 18, thereby make fixture block 16 continue the downthehole circle of card on conveyer belt 8, push rod 10 keeps ascending perpendicularly, along with push rod 10 shifts out conveyer belt 8, push rod 10 will cut to one side under the effect of restoring force, support with pin 11.

Here, the slide rod 27 passes through the push plate 15 so that the push plate 15 can move only along the axial direction of the slide rod 27, thereby limiting the movement of the push plate 15.

In order to realize better positioning effect to conveyer belt 8, the screens subassembly has two, and two screens subassemblies set up respectively at the both ends of conveyer belt 8.

In order to limit the movement of the push plate 15, a slide rod 27 is arranged in the sleeve 14, the slide rod 27 penetrates through the push plate 15, and the slide rod 27 is connected with the push plate 15 in a sliding manner.

In order to better limit the movement of the push plate 15, the number of the slide rods 27 is two, and the two slide rods 27 are respectively arranged at two ends of the push plate 15.

As shown in fig. 4, the clamping mechanism includes two fixing plates 19, a first clamping plate 20, a second clamping plate 21, a limiting rod 22, a second spring 23, an L-shaped rod 24 and a pulling rope 25, the two fixing plates 19 are respectively disposed on two sides of the conveyor belt 8, the first clamping plate 20 and the second clamping plate 21 are both disposed between the two fixing plates 19, the first clamping plate 20 and the second clamping plate 21 are respectively located on two sides of the conveyor belt 8, two ends of the limiting rod 22 are respectively connected with the two fixing plates 19, the limiting rod 22 passes through the first clamping plate 20 and the second clamping plate 21, the first clamping plate 20 is fixedly connected with the limiting rod 22, the second clamping plate 21 is slidably connected with the limiting rod 22, the second spring 23 is sleeved on the limiting rod 22, the second spring 23 is located between the fixing plates 19 and the second clamping plate 21, one end of the second spring 23 is connected with the fixing plates 19, the other end of the second spring 23 is connected with the second clamping plate 21, the number of the L-shaped rods 24 is two, the two L-shaped rods 24 are respectively arranged on the first clamping plate 20 and the second clamping plate 21, the pulling rope 25 is arranged at one end of the L-shaped rod 24 far away from the first clamping plate 20, two ends of the pulling rope 25 are respectively connected with the two L-shaped rods 24, and the pulling rope 25 is positioned at one side of the push rod 10 far away from the first clamping plate 20.

When the push rod 10 slides on the first stopper 12, the push rod 10 displaces, the push rod 10 pushes the pull rope 25, the pull rope 25 generates a pulling force on the two L-rods 24, so that the two L-rods 24 approach each other, so that the first clamping plate 20 and the second clamping plate 21 connected with the L-rods 24 approach each other, because the first clamping plate 20 is fixed, the second clamping plate 21 moves towards the first clamping plate 20, so that the workpiece moves towards the first clamping plate 20, when the push rod 10 moves to the second stopper 13, the distance between the first clamping plate 20 and the second clamping plate 21 is minimum, at this time, the workpiece is just clamped, so that the workpiece is positioned, the punching precision is improved, at this time, the second spring 23 is in a stretching state, the restoring force of the second spring 23 generates a pulling force on the second clamping plate 21, the second clamping plate 21 generates a pulling force on the L-rods 24, and the L-rods 24 generate a pulling force on the pull rope 25, the pull rope 25 can not move due to the blocking of the push rod 10, so that the second clamping rod can not move, the clamping state of the workpiece is kept, when the push rod 10 moves to the first limiting block 12 in the reverse direction, the push rod 10 moves in the reverse direction, the pull rope 25 is released, and under the action of the second spring 23, the second clamping plate 21 and the first clamping plate 20 are far away from each other, so that the workpiece is loosened.

When continuous punching is needed, continuous positioning transmission and continuous punching of the conveying belt 8 can be realized only by repeatedly operating the cylinder 4.

Here, the limiting rod 22 passes through the second clamping block, so that the second clamping block can only move along the axial direction of the limiting rod 22, and the movement of the second clamping plate 21 is limited.

Here, the first clamp 20 is fixed and the second clamp 21 is moved so as to shift the workpiece toward the conveyor 8, thereby preventing the workpiece from colliding with the pusher 10 during conveyance.

In order to better limit the movement of the second clamping block, the two limiting rods 22 are provided, the two limiting rods 22 are respectively arranged at two ends of the first clamping block, the two second springs 23 are provided, and the two second springs 23 are respectively sleeved on the two limiting rods 22.

The device punches through the mechanism realization of punching, move the subassembly downwards through the mechanism drive of punching, thereby make push rod 10 drive conveyer belt 8 remove, convey the work piece to 6 below bits, and the removal through push rod 10 realizes pressing from both sides tight to the work piece, the precision of punching has been improved, fixture makes the work piece be partial to one side of conveyer belt 8 simultaneously, when avoiding the work piece to remove, collide with push rod 10, it is spacing to conveyer belt 8 through the screens subassembly, make the displacement distance of conveyer belt 8 keep fixed, thereby make the displacement distance of work piece at every turn keep fixed, the precision of punching has been improved.

Compared with the prior art, this high continuous perforating device of precision, realize punching through the mechanism of punching, fix a position conveying mechanism through positioning mechanism, thereby fix a position the realization of the work piece on conveying belt 8, realize the centre gripping to the work piece through fixture, the punching precision has been improved, compare with current perforating device, the device is through an output source, realized punching of work piece, the linkage of conveying and centre gripping, the energy has been practiced thrift, compare with current positioning mechanism, this positioning mechanism adopts pure mechanical structure, the use of sensor has been avoided, service life is prolonged, and the stability of mechanism has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The continuous punching device with high precision is characterized by comprising a support, a punching mechanism, two positioning mechanisms, a conveying mechanism and a clamping mechanism, wherein each supporting rod (2) comprises a base (1), two supporting rods (2) and two cross rods (3), the two supporting rods (2) are respectively arranged at two ends of the base (1), the cross rods (3) are arranged above the bases (1) through the two supporting rods (2), the punching mechanism is arranged on the cross rods (3), the conveying mechanism is arranged on the supporting rods (2), the clamping mechanism is arranged under the punching mechanism, and the positioning mechanism comprises a moving assembly and a clamping assembly;

the punching mechanism comprises a cylinder (4), a moving block (5) and a drill bit (6), the cylinder (4) is vertically arranged on the cross rod (3) downwards, the moving block (5) is arranged on an air rod of the cylinder (4), and the drill bit (6) is vertically arranged on the moving block (5) downwards;

the conveying mechanism comprises two rollers (7) and two conveying belts (8), the two rollers (7) are respectively arranged on the two supporting rods (2), the conveying belts (8) are arranged on the two rollers (7), the conveying belts (8) are provided with a plurality of through holes, and the through holes are uniformly formed;

the moving assembly comprises a fixed rod (9), a push rod (10), a stop lever (11), a first stop block (12) and a second stop block (13), the fixed rod (9) is arranged on one side of the moving block (5), the push rod (10) is arranged on one end, far away from the moving block (5), of the fixed rod (9), one end of the push rod (10) is hinged to the fixed rod (9), a torsion spring is arranged at the hinged position of the push rod (10) and the fixed rod (9), one end, far away from the fixed rod (9), of the push rod (10) is arranged opposite to one of the through holes in the conveyor belt (8), the stop lever (11) is arranged on the moving block (5), the baffle is located below the fixed rod (9), one end, far away from the moving block (5), of the stop lever (11) abuts against the push rod (10), and the length of the stop lever (11) is smaller than that of the fixed, the first limiting block (12) and the second limiting block (13) are located below the conveyor belt (8), the first limiting block (12) is located under the push rod (10), the second limiting block (13) is located under the first limiting block (12), the section of the first limiting block (12) is in a right trapezoid shape, the upper bottom of the right trapezoid shape of the section of the first limiting block (12) abuts against the conveyor belt, the section of the second limiting block (13) is in a rectangular shape, and the length of the rectangle of the section of the second limiting block (13) is equal to the length of the lower bottom of the right trapezoid shape of the section of the first limiting block (12);

the clamping assembly comprises a sleeve (14), a push plate (15), a clamping block (16), a connecting rod (17) and a first spring (18), the sleeve (14) is arranged on the base (1), the push plate (15) is arranged in the sleeve (14), the push plate (15) is in sliding connection with the sleeve (14), a round hole is formed in the top of the sleeve (14), the clamping block (16) is located at the round hole, the clamping block (16) is hemispherical, the diameter of the clamping block (16) is larger than that of the round hole, the clamping block (16) is located in one of the through holes in the conveyor belt (8), the clamping block (16) is connected with the push plate (15) through the connecting rod (17), the first spring (18) is arranged in the sleeve (14), one end of the first spring (18) is connected with the push plate (15), and the other end of the first spring (18) is connected with the bottom of the sleeve (14), the first spring (18) is in a compressed state;

the clamping mechanism comprises two fixing plates (19), two first clamping plates (20), two second clamping plates (21), a limiting rod (22), a second spring (23), an L rod (24) and a pull rope (25), the two fixing plates (19) are respectively arranged on two sides of the conveyor belt (8), the first clamping plates (20) and the second clamping plates (21) are respectively arranged between the two fixing plates (19), the first clamping plates (20) and the second clamping plates (21) are respectively arranged on two sides of the conveyor belt (8), two ends of the limiting rod (22) are respectively connected with the two fixing plates (19), the limiting rod (22) penetrates through the first clamping plates (20) and the second clamping plates (21), the first clamping plates (20) are fixedly connected with the limiting rod (22), the second clamping plates (21) are slidably connected with the limiting rod (22), and the second spring (23) is sleeved on the limiting rod (22), the utility model discloses a set up the pull rope (25) on the push rod (10), the second spring (23) are located between fixed plate (19) and second splint (21), the one end and fixed plate (19) of second spring (23) are connected, the other end and the second splint (21) of second spring (23) are connected, L pole (24) have two, and two L poles (24) set up respectively on first splint (20) and second splint (21), pull rope (25) set up the one end of keeping away from first splint (20) in L pole (24), the both ends of pull rope (25) are connected with two L poles (24) respectively, pull rope (25) are located one side that first splint (20) were kept away from in push rod (10).

2. The continuous perforating device with high precision as claimed in claim 1, characterized in that there are two of said blocking assemblies, which are respectively arranged at the two ends of the conveyor belt (8).

3. The continuous punching device with high precision according to claim 1, wherein the number of the limiting rods (22) is two, the two limiting rods (22) are respectively arranged at two ends of the first clamping block, the number of the second springs (23) is two, and the two second springs (23) are respectively sleeved on the two limiting rods (22).

4. The continuous perforating device with high precision as claimed in claim 1, characterized in that a bearing block (26) is arranged below the conveyor belt (8), said bearing block (26) being located directly below the drill head (6).

5. The continuous perforating device with high precision as claimed in claim 1, characterized in that a slide rod (27) is arranged in said sleeve (14), said slide rod (27) passes through said push plate (15), said slide rod (27) is slidably connected with said push plate (15).

6. The continuous perforating device with high precision as claimed in claim 5, characterized in that said slide bars (27) are two, two slide bars (27) being respectively provided at both ends of the pusher (15).

7. The continuous perforating device with high precision as claimed in claim 1, characterized in that the end of the stop lever (11) remote from the moving block (5) is provided with a projection which abuts against the push rod (10).

8. The continuous perforating device with high precision as claimed in claim 1, characterized in that the end of the pusher (10) remote from the fixing bar (9) is provided with a roller.

9. The continuous perforating device with high precision as claimed in claim 1, characterized in that the thickness of the first stopper (12) is smaller than the minimum distance from the drill (6) to the workpiece.

10. Continuous perforating device with high precision as claimed in claim 1, characterized in that the minimum distance of the drill head (6) from the conveyor belt (8) is greater than the maximum distance of the extension of the gas rod of the cylinder (4).