CN111842958A

CN111842958A - Perforating device for thin-wall plates

Info

Publication number: CN111842958A
Application number: CN202010735862.4A
Authority: CN
Inventors: 韩平
Original assignee: Nanjing Jiangning District Shangfeng Guoyin Standard Parts Factory
Current assignee: Nanjing Jiangning District Shangfeng Guoyin Standard Parts Factory
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2020-10-30

Abstract

The invention relates to a punching device for thin-wall plates, which comprises a base, a cross rod, a stand column, a driving box, a driving shaft, a working platform, a punching mechanism and a clamping mechanism, wherein the clamping mechanism comprises a prying rod, a fixing rod and a clamping plate, the punching mechanism comprises a connecting rod, a rectangular block, a positioning drill and a punching assembly, the punching device for the thin-wall plates increases the clamping area through the arc-shaped clamping plate so as to realize better fixation, an operator can more conveniently and more labor-saving when pushing the prying rod through the lever principle, the labor intensity of the operator is reduced, the punching mechanism realizes the adjustment of different cutters through the matching of a first screw rod, a second screw rod and a walking ring so as to realize the punching of apertures with different sizes, the limitation of the walking through a first spring is realized, the movement of the walking ring caused by the stress of the cutter is prevented, and the accuracy is improved, through the branch of being connected with the connecting rod, realize the stability to the cutter, increase the rigidity of connecting rod and cutter, improved the usability of using.

Description

Perforating device for thin-wall plates

Technical Field

The invention relates in particular to a perforating device for thin-walled plates and the like.

Background

The drilling machine is a machine tool which mainly uses a drill to machine a hole on a workpiece. Typically the drill bit is rotated into a primary motion and the drill bit is moved axially into a feed motion. The drilling machine is simple in structure, relatively low in machining precision, capable of drilling through holes and blind holes, capable of replacing special cutters and capable of expanding, reaming and reaming or tapping, the workpiece is fixed in the machining process, the cutters are made to move, the centers of the cutters are aligned with the center of the hole, and the cutters are made to rotate (main motion). The drilling machine is characterized in that a workpiece is fixed, a cutter rotates and feeds along the direction of a main shaft, and the operation can be manual or motor-driven.

However, the existing drilling machine is generally not ideal for punching thin-wall plate workpieces, and has extremely high requirement limit on the grinding of the drill bit, so that the progress requirement on punched holes cannot be guaranteed, the product quality is influenced, the consumed time is long, and the processing efficiency is influenced.

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 punching device for the thin-wall-shaped plate is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a punching device for thin-wall plates comprises a base, a cross rod, a stand column, a driving box, a driving shaft, a working platform, a punching mechanism and a clamping mechanism, wherein the base is horizontally arranged, the cross rod is arranged above the base, the stand column is arranged between the cross rod and the base, the cross rod is connected with the base through the stand column, the working platform is arranged on the base, the driving box is arranged below the cross rod, the driving device is arranged in the driving box, the driving shaft is arranged below the driving box, the driving shaft is connected with the driving device through the driving box, the clamping mechanism is arranged on the base, and the punching mechanism is arranged at one end, away from the driving box, of the driving shaft;

the clamping device comprises a base, a clamping mechanism and a clamping plate, wherein the clamping mechanism is provided with two clamping mechanisms, the two clamping mechanisms are respectively arranged at two ends above the base and are symmetrical about a driving shaft, the clamping mechanism comprises a prying rod, a fixed rod and a clamping plate, the prying rod is arranged above the base, the fixed rod is arranged between the base and the prying rod, one end of the fixed rod is connected with the base, the other end of the fixed rod is hinged with the middle part of the prying rod, a torsion spring is arranged at the hinged part of the fixed rod and the prying rod, the clamping plate is arranged at one end, close to the driving shaft, of the prying rod, one end of the clamping plate is hinged with the prying rod, and the other end;

the punching mechanism comprises a connecting rod, a rectangular block, a positioning drill and a punching assembly, the rectangular block is arranged at one end, away from the driving box, of the driving shaft, the connecting rod is arranged between the driving shaft and the rectangular block, one end of the connecting rod is connected with the driving shaft, the other end of the connecting rod is connected with the middle of the rectangular block, the connecting rod and the driving shaft are coaxially arranged, the positioning drill is vertically arranged below the rectangular block, the top end of the positioning drill is connected with the middle of one end, away from the connecting rod, of the rectangular block, and the positioning drill and the driving shaft are coaxially arranged;

the punching assembly comprises a first lead screw, a second lead screw and punching units, the first lead screw and the second lead screw are coaxially arranged, the first lead screw is horizontally arranged in the rectangular block, the punching units are two, the two punching units are respectively arranged on the first lead screw and the second lead screw, the two punching units are symmetrical about a positioning drill, the punching units comprise a walking ring, a connecting rod and a cutter, the walking ring is sleeved on the first lead screw, the walking ring is in transmission connection with the first lead screw, one end, close to the positioning drill, of the rectangular block is provided with a strip-shaped through hole, the cutter is vertically arranged below the rectangular block, the connecting rod is arranged between the cutter and the walking ring, one end of the connecting rod is connected with the cutter, and the other end of the connecting rod is connected with the outer ring of the walking ring through the strip-shaped through hole, the connecting rod is connected with the strip-shaped through hole in a sliding manner;

the limiting rod is arranged in the rectangular block and is parallel to the first lead screw, the limiting rod is located below the first lead screw, the connecting rod sleeve is arranged on the limiting rod, and the connecting rod is connected with the limiting rod in a sliding mode.

In order to increase the rigidity of cutter for the better commentaries on classics hole of cutter, be equipped with stabilizing mean in the bar through-hole, stabilizing mean has two, and two stabilizing mean set up the both sides at the connecting rod respectively, stabilizing mean includes slider, litter and branch, be equipped with the recess on the inner wall of the both sides of bar through-hole, the litter is located the recess, the slider sets up in the bar through-hole, the slider passes through litter and recess sliding connection, branch sets up between slider and connecting rod, the slider passes through branch and is connected with the connecting rod.

In order to realize spacing to the spacing ring, prevent that the spacing ring atress from removing to the influence precision of punching, the cover is equipped with first spring on the first lead screw, the both ends of first spring lean on with two position rings of walking in two units of punching respectively, first spring is in compression state.

For better centre gripping, be equipped with the second spring between prying pole and the base, the second spring is located between dead lever and the grip block, the one end and the base of second spring are connected, the other end and the prying bar of second spring are connected.

In order to facilitate the size of regulation hole, the one end of rectangular block is equipped with the handle, be equipped with the dwang between handle and the rectangular block, the one end and the handle of dwang are connected, the other end of dwang passes through the rectangular block and is connected with first lead screw, the dwang is connected with first screw drive.

In order to realize the protection to work platform, establish bakelite board on the base, bakelite board is located between base and the grip block, the one end and the base of bakelite board support and lean on, the other end and the grip block of bakelite board support and lean on.

In order to increase the friction force between the clamping plate and the workpiece and further to enable the clamping to be more stable, a rubber pad is arranged at one end, away from the prying rod, of the clamping plate.

In order to increase the clamping area of the workpiece and prevent the workpiece from deforming during punching, the clamping plate is arc-shaped, and the circle center of the clamping plate is positioned on the driving shaft.

In order to save the cost, make the operator can realize the bending of removal at the during operation both legs simultaneously to improve the travelling comfort, work platform cavity sets up, one side of work platform is equipped with the opening.

In order to increase firmness, the connecting rod and the rectangular block are integrally formed.

The punching device for the thin-wall plate achieves clamping of a workpiece through the clamping mechanism, compared with the existing clamping mechanism, the clamping mechanism increases the clamping area through the arc-shaped clamping plate, so that better fixation is achieved, an operator is more labor-saving and convenient to push the prying rod through the lever principle, the labor intensity of the operator is reduced, punching of the workpiece is achieved through the punching mechanism, compared with the existing punching mechanism, the punching mechanism achieves punching of different holes through the matching of the first lead screw, the second lead screw and the walking ring, so that the holes of different sizes are achieved, the walking ring is prevented from moving due to the stress of the cutter, the accuracy is improved, the stability of the cutter is achieved through the supporting rod connected with the connecting rod, and meanwhile the rigidity of the connecting rod and the cutter is increased, the cutter is stressed to deform when the cutter is used for processing a workpiece, so that cutter yielding is caused, the cutter is damaged, the workpiece is scrapped, and the use property 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 punching apparatus for thin-walled sheet-like products according to the present invention;

FIG. 2 is a schematic structural view of a punching mechanism of the punching device for thin-wall-shaped plates of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a schematic structural view of a punching mechanism of the punching device for thin-wall-shaped plates of the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic view showing a connection structure of a positioning drill, a rectangular block, a cutter and a stabilizing mechanism of the punching device for thin-walled plates of the present invention;

in the figure: 1. the automatic cutting machine comprises a base, 2 parts of a cross rod, 3 parts of a stand column, 4 parts of a driving box, 5 parts of a driving shaft, 6 parts of a working platform, 7 parts of a prying rod, 8 parts of a fixing rod, 9 parts of a clamping plate, 10 parts of a connecting rod, 11 parts of a rectangular block, 12 parts of a positioning drill, 13 parts of a first screw rod, 14 parts of a second screw rod, 15 parts of a walking ring, 16 parts of a connecting rod, 17 parts of a cutter, 18 parts of a sliding block, 19 parts of a sliding rod, 20 parts of a support rod, 21 parts of a first spring, 22 parts of a second spring and 23 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. 1-6, a punching device for thin-wall plates comprises a base 1, a cross rod 2, a column 3, a driving box 4, a driving shaft 5, a working platform 6, a punching mechanism and a clamping mechanism, wherein the base 1 is horizontally arranged, the cross rod 2 is arranged above the base 1, the column 3 is arranged between the cross rod 2 and the base 1, the cross rod 2 is connected with the base 1 through the column 3, the working platform 6 is arranged on the base 1, the driving box 4 is arranged below the cross rod 2, the driving device is arranged in the driving box 4, the driving shaft 5 is arranged below the driving box 4, the driving shaft 5 is connected with the driving device through the driving box 4, the clamping mechanism is arranged on the base 1, and the punching mechanism is arranged at one end of the driving shaft 5 far away from the driving box 4;

the clamping device comprises two clamping mechanisms, wherein the two clamping mechanisms are respectively arranged at two ends above a base 1, the two clamping mechanisms are symmetrical about a driving shaft 5, each clamping mechanism comprises a prying rod 7, a fixing rod 8 and a clamping plate 9, the prying rod 7 is arranged above the base 1, the fixing rod 8 is arranged between the base 1 and the prying rod 7, one end of the fixing rod 8 is connected with the base 1, the other end of the fixing rod 8 is hinged with the middle part of the prying rod 7, a torsion spring is arranged at the hinged part of the fixing rod 8 and the prying rod 7, the clamping plate 9 is arranged at one end, close to the driving shaft 5, of the prying rod 7, one end of the clamping plate 9 is hinged with the prying rod 7, and the other end of the clamping plate 9 is abutted to the upper surface of the base 1;

the punching mechanism comprises a connecting rod 10, a rectangular block 11, a positioning drill 12 and a punching assembly, wherein the rectangular block 11 is arranged at one end, far away from the driving box 4, of the driving shaft 5, the connecting rod 10 is arranged between the driving shaft 5 and the rectangular block 11, one end of the connecting rod 10 is connected with the driving shaft 5, the other end of the connecting rod 10 is connected with the middle of the rectangular block 11, the connecting rod 10 and the driving shaft 5 are coaxially arranged, the positioning drill 12 is vertically arranged below the rectangular block 11, the top end of the positioning drill 12 is connected with the middle of one end, far away from the connecting rod 10, of the rectangular block 11, and the positioning drill 12 and the driving shaft 5 are coaxially arranged;

the punching assembly is arranged in the rectangular block 11 in a hollow mode, the punching assembly comprises a first lead screw 13, a second lead screw 14 and punching units, the first lead screw 13 and the second lead screw 14 are coaxially arranged, the first lead screw 13 is horizontally arranged in the rectangular block 11, the punching units are two, the two punching units are respectively arranged on the first lead screw 13 and the second lead screw 14 and are symmetrical relative to the positioning drill 12, the punching units comprise a walking ring 15, a connecting rod 16 and a cutter 17, the walking ring 15 is sleeved on the first lead screw 13, the walking ring 15 is in transmission connection with the first lead screw 13, a strip-shaped through hole is formed in one end, close to the positioning drill 12, of the rectangular block 11, the cutter 17 is vertically arranged below the rectangular block 11, the connecting rod 16 is arranged between the cutter 17 and the walking ring 15, one end of the connecting rod 16 is connected with the cutter 17, the other end of the connecting rod 16 is connected with the outer ring of the walking ring 15 through a strip-shaped through hole, and the connecting rod 16 is connected with the strip-shaped through hole in a sliding manner;

the novel lead screw structure is characterized in that a limiting rod 23 is arranged in the rectangular block 11, the limiting rod 23 is parallel to the first lead screw 13, the limiting rod 23 is located below the first lead screw 12, the connecting rod 16 is sleeved on the limiting rod 23, and the connecting rod 16 is connected with the limiting rod 23 in a sliding mode.

In order to increase the rigidity of the cutter 17 and enable the cutter 17 to rotate better, stabilizing mechanisms are arranged in the strip-shaped through holes, the two stabilizing mechanisms are arranged on two sides of the connecting rod 16 respectively and comprise a sliding block 18, a sliding rod 19 and a supporting rod 20, grooves are formed in the inner walls of two sides of each strip-shaped through hole, the sliding rod 19 is located in each groove, the sliding block 18 is arranged in the strip-shaped through hole, the sliding block 18 is connected with the grooves in a sliding mode through the sliding rod 19, the supporting rod 20 is arranged between the sliding block 18 and the connecting rod 16, and the sliding block 18 is connected with the connecting rod 16 through the supporting rod 20.

In order to realize the spacing to the spacing ring, prevent that the spacing ring atress from removing to influence the precision of punching, the cover is equipped with first spring 21 on the first lead screw 13, the both ends of first spring 21 lean on with two walking rings 15 in two units of punching respectively, first spring 21 is in compression state.

For better clamping, be equipped with second spring 22 between pry pole 7 and the base 1, second spring 22 is located between dead lever 8 and the grip block 9, the one end and the base 1 of second spring 22 are connected, the other end and the pry pole 7 of second spring 22 are connected.

In order to facilitate the size of regulation hole, the one end of rectangular block 11 is equipped with the handle, be equipped with the dwang between handle and the rectangular block 11, the one end and the handle of dwang are connected, the other end of dwang passes through rectangular block 11 and is connected with first lead screw 13, the dwang is connected with first lead screw 13 transmission.

In order to realize the protection of work platform 6, establish bakelite plate on the base 1, bakelite plate is located between base 1 and the grip block 9, the one end of bakelite plate supports with base 1 and leans on, the other end and the grip block 9 of bakelite plate support and lean on.

In order to increase the friction force between the clamping plate 9 and the workpiece and further to enable the clamping to be more stable, a rubber pad is arranged at one end, away from the prying rod 7, of the clamping plate 9.

In order to increase the clamping area of the workpiece and prevent the workpiece from deforming during punching, the clamping plate 9 is arc-shaped, and the circle center of the clamping plate 9 is positioned on the driving shaft 5.

In order to save cost and simultaneously enable an operator to realize the bending of movement of two legs during working, thereby improving comfort, the working platform 6 is arranged in a hollow mode, and one side of the working platform 6 is provided with an opening.

In order to increase the firmness, the connecting rod 10 and the rectangular block 11 are integrally formed.

When a workpiece needs to be punched, one end, far away from the clamping plate 9, of the prying plate is pressed firstly, the prying rod 7 drives the clamping plate 9 to move, the clamping plate 9 moves towards the direction of the cross rod 2, the second spring 22 is in a stretching state, then the workpiece is placed on the bakelite plate on the base 1, the prying rod 7 is loosened, and the workpiece is clamped through restoring forces of the torsion spring and the second spring 22.

The contact area of the clamping plate 9 and the workpiece is increased through the arc-shaped clamping plate 9, so that the workpiece is more stable, the friction force between the clamping plate 9 and the workpiece is increased through the rubber pad on the clamping plate 9, the workpiece is prevented from slipping, and the punching precision is prevented.

Then, the handle is rotated to drive the rotating rod to rotate, the rotating rod drives the first screw rod 13 to rotate, the first screw rod 13 drives the second screw rod 14 to rotate, meanwhile, the first screw rod 13 drives the position moving ring 15 to move, the position moving ring 15 drives the connecting rod 16 to move, so that the connecting rod 16 moves in the strip-shaped through hole, and then the connecting rod 16 drives the cutter 17 to move.

The limiting rod 23 is used for limiting the connecting rod 16, and ensures that the connecting rod 16 can only move along the axial direction of the limiting rod 23, and because the thread directions of the first screw 13 and the second screw 14 are opposite and symmetrical about the positioning drill 12, when the handle is rotated, the walking rings 15 on the first screw 13 and the second screw 14 move towards the center or two ends simultaneously.

Here, the link 16 moves to drive the rod 20 to move, the rod 20 drives the slider 18 to move, the slider 18 drives the slide rod 19 to move, the slide rod 19 moves in the groove, the link 16 is supported through the support of the rod 20 to the link 16, the rigidity of the link 16 is increased, and the cutter 17 is prevented from being damaged due to cutter back of the cutter 17.

Then the driving device in the driving box 4 is operated, the driving shaft 5 of the driving device rotates, the driving shaft 5 is moved up and down, the driving shaft 5 moves to drive the connecting rod 10 to rotate, the connecting rod 10 drives the rectangular block 11 to rotate, the rectangular block 11 drives the positioning drill 12 to rotate, the positioning drill 12 is used for positioning a workpiece, and the driving shaft 5 is driven to move towards the direction of the base 1 to punch the hole.

The distance between the lowest point of the positioning drill 12 and the base 1 is here smaller than the distance between the lowest point of the tool 17 and the base 1.

Compared with the prior art, the punching device for the thin-wall-shaped plate realizes the clamping of the workpiece through the clamping mechanism, compared with the prior clamping mechanism, the clamping mechanism increases the clamping area through the arc-shaped clamping plate 9, thereby realizing better fixation, leading an operator to be more labor-saving and convenient in pushing the prying rod 7 through the lever principle, reducing the labor intensity of the operator, realizing the punching of the workpiece through the punching mechanism, compared with the prior punching mechanism, the punching mechanism realizes the regulation of different cutters 17 through the matching of the first lead screw 13, the second lead screw 14 and the walking ring 15, thereby realizing the punching of apertures with different sizes, realizing the limitation of walking through the first spring 21, preventing the cutter 17 from being forced to cause the movement of the walking ring 15, improving the accuracy, realizing the stability of the cutter 17 through the supporting rod 20 connected with the connecting rod 16, meanwhile, the rigidity of the connecting rod 16 and the cutter 17 is increased, so that the cutter 17 is stressed to deform when a workpiece is machined, the cutter 17 is retracted, the cutter 17 is damaged and the workpiece is scrapped, and the use usability is 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 punching device for the thin-wall-shaped plates is characterized by comprising a base (1), a cross rod (2), a stand column (3), a driving box (4), a driving shaft (5), a working platform (6), a punching mechanism and a clamping mechanism, wherein the base (1) is horizontally arranged, the cross rod (2) is arranged above the base (1), the stand column (3) is arranged between the cross rod (2) and the base (1), the cross rod (2) is connected with the base (1) through the stand column (3), the working platform (6) is arranged on the base (1), the driving box (4) is arranged below the cross rod (2), the driving device is arranged in the driving box (4), the driving shaft (5) is arranged below the driving box (4), the driving shaft (5) is connected with the driving device through the driving box (4), and the clamping mechanism is arranged on the base (1), the punching mechanism is arranged at one end of the driving shaft (5) far away from the driving box (4);

the two clamping mechanisms are respectively arranged at two ends above the base (1) and are symmetrical about the driving shaft (5), the clamping mechanism comprises a prying rod (7), a fixed rod (8) and a clamping plate (9), the prying rod (7) is arranged above the base (1), the fixed rod (8) is arranged between the base (1) and the prying rod (7), one end of the fixed rod (8) is connected with the base (1), the other end of the fixed rod (8) is hinged with the middle part of the prying rod (7), a torsional spring is arranged at the hinged position of the fixed rod (8) and the prying rod (7), the clamping plate (9) is arranged at one end of the prying rod (7) close to the driving shaft (5), one end of the clamping plate (9) is hinged with the prying rod (7), and the other end of the clamping plate (9) abuts against the upper surface of the base (1);

the punching mechanism comprises a connecting rod (10), a rectangular block (11), a positioning drill (12) and a punching assembly, the rectangular block (11) is arranged at one end, far away from the driving box (4), of the driving shaft (5), the connecting rod (10) is arranged between the driving shaft (5) and the rectangular block (11), one end of the connecting rod (10) is connected with the driving shaft (5), the other end of the connecting rod (10) is connected with the middle of the rectangular block (11), the connecting rod (10) and the driving shaft (5) are coaxially arranged, the positioning drill (12) is vertically arranged below the rectangular block (11), the top end of the positioning drill (12) is connected with the middle of one end, far away from the connecting rod (10), of the rectangular block (11), and the positioning drill (12) and the driving shaft (5) are coaxially arranged;

the punching machine is characterized in that the rectangular block (11) is arranged in a hollow mode, the punching assembly is arranged in the rectangular block (11) and comprises a first lead screw (13), a second lead screw (14) and punching units, the first lead screw (13) and the second lead screw (14) are coaxially arranged, the first lead screw (13) is horizontally arranged in the rectangular block (11), the punching units are two, the two punching units are respectively arranged on the first lead screw (13) and the second lead screw (14), the two punching units are symmetrical about the positioning drill (12), the punching units comprise a walking ring (15), a connecting rod (16) and a cutter (17), the walking ring (15) is sleeved on the first lead screw (13), the walking ring (15) is in transmission connection with the first lead screw (13), one end, close to the positioning drill (12), of the rectangular block (11) is provided with a bar-shaped through hole, and the rectangular cutter (17) is vertically arranged below the rectangular block (11), the connecting rod (16) is arranged between the cutter (17) and the walking ring (15), one end of the connecting rod (16) is connected with the cutter (17), the other end of the connecting rod (16) is connected with the outer ring of the walking ring (15) through a strip-shaped through hole, and the connecting rod (16) is connected with the strip-shaped through hole in a sliding manner;

be equipped with gag lever post (23) in rectangular block (11), gag lever post (23) are parallel with first lead screw (13), gag lever post (23) are located the below of first lead screw (12), connecting rod (16) cover is established on gag lever post (23), connecting rod (16) and gag lever post (23) sliding connection.

2. The perforating device for thin-walled plates as claimed in claim 1, characterized in that two stabilizing mechanisms are provided in the strip-shaped through hole, the two stabilizing mechanisms are respectively provided on both sides of the connecting rod (16), the stabilizing mechanism comprises a slide block (18), a slide rod (19) and a support rod (20), grooves are provided on the inner walls of both sides of the strip-shaped through hole, the slide rod (19) is located in the grooves, the slide block (18) is provided in the strip-shaped through hole, the slide block (18) is slidably connected with the grooves through the slide rod (19), the support rod (20) is provided between the slide block (18) and the connecting rod (16), and the slide block (18) is connected with the connecting rod (16) through the support rod (20).

3. Perforating device for thin-walled sheets or the like according to claim 1, characterized in that said first screw (13) is sheathed with a first spring (21), both ends of said first spring (21) being in abutment against two indexing rings (15) in two perforating units, respectively, said first spring (21) being in compression.

4. The perforating device for thin-walled plates or the like according to claim 1, characterized in that a second spring (22) is provided between the pry rod (7) and the base (1), said second spring (22) being located between the fixing rod (8) and the clamping plate (9), one end of said second spring (22) being connected to the base (1) and the other end of said second spring (22) being connected to the pry rod (7).

5. The perforating device for thin-walled plates as claimed in claim 1, characterized in that a handle is arranged at one end of the rectangular block (11), a rotating rod is arranged between the handle and the rectangular block (11), one end of the rotating rod is connected with the handle, the other end of the rotating rod is connected with the first screw rod (13) through the rectangular block (11), and the rotating rod is in transmission connection with the first screw rod (13).

6. The perforating device for thin-walled plates or the like according to claim 1, characterized in that the base (1) is provided with a bakelite plate, which is located between the base (1) and the clamping plate (9), one end of which abuts against the base (1) and the other end of which abuts against the clamping plate (9).

7. A perforating device for thin-walled sheets as claimed in claim 1, characterized in that a rubber pad is provided at the end of the clamping plate (9) remote from the pry bar (7).

8. Perforating device for thin-walled sheets or the like according to claim 1, characterized in that the clamping plate (9) is arc-shaped, the centre of the clamping plate (9) being located on the drive shaft (5).

9. Perforating device for thin-walled sheets or the like according to claim 1, characterized in that the working platform (6) is hollow, the working platform (6) being provided with an opening on one side.

10. Perforating device for thin-walled sheets or the like according to claim 1, characterized in that said connecting rods (10) and rectangular blocks (11) are made in one piece.