CN211679648U

CN211679648U - Punch press convenient to change mould

Info

Publication number: CN211679648U
Application number: CN201922324558.6U
Authority: CN
Inventors: 张静; 敖子建; 黄建刚
Original assignee: Wuhan Hechuang Auto Parts Co ltd
Current assignee: Wuhan Hechuang Auto Parts Co ltd
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2020-10-16
Anticipated expiration: 2029-12-21

Abstract

The utility model relates to a punch press convenient for replacing a mold, which comprises a base and an upper frame, wherein a plurality of pillars are fixedly connected between the base and the upper frame, the upper end surface of the base is provided with a lower mold, the lower end surface of the upper frame is provided with an upper mold in a lifting way, the upper end surface of the base and the lower end surface of the upper frame are both provided with lining plates, two L-shaped buckling seats which are arranged oppositely are arranged at the two ends of the lining plates in the length direction in a sliding way, and a driving device for driving the two buckling seats to move in the opposite direction/in the opposite direction; the bottom of going up mould and lower mould all the rigid coupling have along the protruding edge of its profile, protruding along thickness with detain the vertical section of seat in along length the same, detain and be provided with the locking means who is used for carrying out the locking to protruding edge on the seat, be provided with on the welt and be used for going on the positioner who fixes a position last mould and lower mould. The utility model discloses a two knot seats are to the quick lock of last mould or lower mould, fix a position, fix with positioner and locking means to last mould or lower mould again, have improved the efficiency that the mould was changed to the punch press.

Description

Punch press convenient to change mould

Technical Field

The utility model belongs to the technical field of stamping equipment's technique and specifically relates to a punch press convenient to change mould is related to.

Background

A punching machine is a device for processing plates by punching an upper die and a lower die, can perform blanking, punching, forming, deep drawing, trimming, fine punching, shaping, riveting, extruding and the like, and is widely applied to various fields. In the production of sheet metal parts, the stamping process has the advantages of material and energy conservation, high efficiency, low technical requirement on operators and capability of making products which cannot be machined by applying various dies, so that the sheet metal parts are more and more widely used.

The current chinese patent with patent publication number CN109940077A, a high-speed punch press with buffer for auto-parts production is proposed, which comprises a base, frame and controller are installed on the top of base, the frame is located one side of controller, and the frame is by the chassis, pillar and roof-rack are constituteed jointly, the pillar welds between chassis and roof-rack, the work piece mould is installed on the top of chassis, the motor is installed on the top of roof-rack, the one end of motor is rotated through the pivot and is connected crank link mechanism, crank link mechanism is by the runner, the crank link, sliding sleeve and slide bar are constituteed jointly, the both ends of crank link are connected with runner and sliding sleeve respectively, the sliding sleeve cover is located on the slide bar, and the bottom welding of sliding sleeve has the punching press post. The invention is provided with an adjusting seat, a sliding chute, a sliding block, a first toothed plate and a second toothed plate. The buffering mechanism in the punch press can realize the position adjustment effect through the adjusting seat in the using process.

The above prior art solutions have the following drawbacks: generally, automobile accessories are various, different upper dies and different lower dies need to be used in machining, so that the upper dies and the lower dies need to be frequently replaced in actual production, an existing punching die is basically fixed on a punching machine through bolt bolting, when the die is replaced by a worker, the operation is complex, and the bolt is frequently screwed, so that the bolt is easily slipped.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a punch press convenient to change mould, it has the swift advantage of change mould.

The above object of the present invention can be achieved by the following technical solutions:

a punch press convenient for replacing a die comprises a base and a top frame, wherein a plurality of supporting columns are fixedly connected between the base and the top frame, a lower die is arranged on the upper end surface of the base, an upper die is arranged on the lower end surface of the top frame in a lifting mode right above the lower die, rectangular lining plates are arranged on the upper end surface of the base and the lower end surface of the top frame, two L-shaped buckling seats which are oppositely arranged are arranged at two ends of the lining plates in a sliding mode, vertical sections of the buckling seats are arranged on the lining plates in a sliding mode, and driving devices used for driving the two buckling seats to move in the opposite direction/back direction are arranged on the lining plates; go up the mould with the equal rigid coupling in bottom of lower mould has along the protruding edge of its profile, protruding along thickness with detain in the vertical section of seat along length the same, it is right to be provided with on the knot seat protruding along the locking means who carries out the locking, it is right to be provided with on the welt be used for go up the mould with the lower mould carries out the positioner who fixes a position.

By adopting the technical scheme, when the die is installed, the driving device drives the two buckle seats to move oppositely or reversely to a proper distance, so that the convex edge on the upper die or the lower die can be completely inserted into the buckle seats and abutted against the inner side walls of the vertical sections of the buckle seats at the two ends, the position of the upper die or the lower die on the lining plate is adjusted by sliding the convex edge between the two buckle seats, after the upper die or the lower die is positioned by the positioning device, the convex edge on the upper die or the lower die is locked by the locking device, so that the upper die or the lower die can be stably fixed on the lining plate, and the convex edge has the same thickness as the length of the inner edge of the vertical section of the buckle seat, so that the upper die and the lower die can be clamped by the buckle seats, and the convenience; when the die needs to be replaced, the locking device and the positioning device are respectively unlocked to the upper die or the lower die, and the upper die or the lower die is slid between the two buckle seats until the upper die or the lower die is taken out, so that the die removing efficiency is improved, the effect of quickly replacing the die by the punch is realized, meanwhile, the connection structure of the stress of the bolt is reduced, and the phenomenon that the die replacing efficiency is influenced due to the fact that the bolt slides is avoided as much as possible.

The present invention may be further configured in a preferred embodiment as: the driving device comprises a plurality of fixedly connected T-shaped sliders, the T-shaped sliders are fixedly connected with the vertical sections of the buckle seats and close to one end of the lining plate, a plurality of T-shaped grooves matched with the sliders in a sliding mode are formed in the lining plate, the T-shaped grooves are formed in the length direction of the lining plate, and one of the T-shaped grooves is internally provided with a driving mechanism used for driving the two sliders to move in the opposite direction or in the opposite direction.

Through adopting above-mentioned technical scheme, detain the seat and set up on the welt through a plurality of sliders that slide in a plurality of T type grooves, especially be provided with on the welt of mould, detain the seat and can provide good carry ability for last mould, ensured the life of detaining the seat, when the not unidimensional mould of installation, the adaptation of detaining seat and last mould or lower mould is realized to the motion of two sliders of accessible actuating mechanism drive in opposite directions/dorsad.

The present invention may be further configured in a preferred embodiment as: actuating mechanism is connected including rotating the double threaded rod that sets up just along its length direction in the T type inslot, the pitch of double threaded rod both ends helicla flute is the same, spiral direction is opposite, double threaded rod both ends respectively with adjacent two slider threaded connection.

Through adopting above-mentioned technical scheme, rotatory double threaded rod, double threaded rod drive two sliders of threaded connection with it when rotatory do the motion that is close to in step or keeps away from at double threaded rod both ends to drive two sliders and do in opposite directions or back to the motion in T type inslot, and then drive two and detain the seat and do in opposite directions or back to the motion, realized drive arrangement and detained the convenient adjustment of seat to two.

The present invention may be further configured in a preferred embodiment as: double threaded rod one end extends to the welt outer wall just has the hand wheel in the coaxial rigid coupling of this tip.

Through adopting above-mentioned technical scheme, rotatory hand wheel drives the rotation of double threaded rod, has realized two convenient adjustments of detaining the seat.

The present invention may be further configured in a preferred embodiment as: the locking device comprises a locking bolt which is arranged on the horizontal end of the buckle base in a penetrating mode through threads, a groove along the length direction of the buckle base is formed in the convex edge, and the groove is in plug-in fit with the end portion of the locking bolt.

Through adopting above-mentioned technical scheme, go up mould or lower mould lock connection back between two knot seats, rotatory locking bolt, locking bolt tip and protruding along the contact and with the recess grafting adaptation for the area of contact increase on locking bolt and protruding edge, the locking bolt of being convenient for will go up mould or lower mould and support tightly on the welt, thereby can further firmly fix last mould or lower mould.

The present invention may be further configured in a preferred embodiment as: the positioning device comprises a plurality of positioning holes formed in one side, close to the buckling seat, of the lining plate, positioning pins are arranged in the positioning holes in a lifting mode, a plurality of pin holes corresponding to the positioning holes are formed in one side, close to the lining plate, of the upper die and one side, close to the lining plate, of the lower die, and an adjusting mechanism for driving the positioning pins to protrude out of the positioning holes is arranged on the lining plate.

Through adopting above-mentioned technical scheme, go up mould or lower mould lock and connect the back between two knot seats, remove mould and lower mould respectively on two welts, make the pinhole on mould and the lower mould align with the locating hole on two welts respectively, through the outstanding locating hole of a plurality of locating pins of adjustment mechanism drive and with the pinhole plug-in connection on the mould or the lower mould that correspond to go up the mould or the lower mould is fixed a position, thereby the precision when guaranteeing to go up mould and lower mould punching press.

The present invention may be further configured in a preferred embodiment as: adjustment mechanism is including seting up the welt lateral wall and with the screw hole of locating hole intercommunication, screw hole female connection has adjusting screw, the locating pin is kept away from the one end of detaining the seat is close to one side of adjusting screw is provided with the inclined plane, the inclined plane deviates from detain the seat, locating pin elasticity sets up in the locating hole.

Through adopting above-mentioned technical scheme, rotatory adjusting screw makes adjusting screw move towards the direction that is close to the locating pin in the screwed hole, supports tightly on the locating pin inclined plane and when continuing to move when adjusting screw, and the locating pin is promoted to shift up and outstanding in the locating hole through its inclined plane and adjusting screw's relative motion to realize the convenient location to cope match-plate pattern or lower bolster.

The present invention may be further configured in a preferred embodiment as: an elastic part is elastically connected between the end part of the positioning pin close to the inclined plane and the bottom wall of the positioning hole, one end of the elastic part is fixedly connected with the positioning pin, and the other end of the elastic part is fixedly connected with the bottom wall of the positioning hole.

By adopting the technical scheme, the positioning pin protrudes out of the positioning hole under the pushing action of the adjusting screw rod, the elastic piece is stretched to generate deformation, when the upper die or the lower die needs to be disassembled, the adjusting screw rod can be rotated reversely to enable the adjusting screw rod to be far away from the positioning pin, and the positioning pin retracts into the positioning hole under the action of the deformation force of the elastic piece, so that the upper die or the lower die can be slid on the lining plate to be conveniently disassembled.

To sum up, the utility model discloses a following at least one useful technological effect:

1. when the die needs to be replaced, the locking device and the positioning device are respectively unlocked to the upper die or the lower die, and the upper die or the lower die is slid between the two buckle seats until the upper die or the lower die is taken out, so that the die removing efficiency is improved, the effect of quickly replacing the die by a punch is realized, meanwhile, the connection structure of the stress of the bolt is reduced, and the phenomenon that the die replacing efficiency is influenced due to the fact that the bolt slides is avoided as much as possible;

2. the double-head threaded rod can realize synchronous opposite or back movement of the two buckle seats, so that the upper die and the lower die with different sizes can be clamped and fixed conveniently, and the upper die and the lower die can be mounted and dismounted more conveniently;

3. the one end that the knot seat was kept away from to the locating pin is provided with the inclined plane, makes adjusting screw rod tip butt at the inclined plane of locating pin and with the ejecting locating hole of locating pin gradually through rotatory regulation pole, can realize positioner to the convenient location of last mould and lower mould, need not to carry out repeated calibration, and it is higher to change mould efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion B in fig. 1.

In the figure, 1, a base; 2. a top frame; 3. a pillar; 4. a lower die; 5. an upper die; 6. a liner plate; 7. a buckle seat; 8. a convex edge; 9. a slider; 10. a T-shaped groove; 11. a double-headed threaded rod; 12. a hand wheel; 13. locking the bolt; 14. a groove; 15. positioning holes; 16. positioning pins; 17. a pin hole; 18. a threaded hole; 19. adjusting the screw rod; 20. a bevel; 21. an elastic member; 22. and a cylinder.

Detailed Description

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

Referring to fig. 1, for the utility model discloses a punch press convenient to change mould, including base 1 and roof-rack 2, the rigid coupling has a plurality of pillars 3 between base 1 and the roof-rack 2, pillar 3 is preferred four and divide and be listed as base 1 four corners department, base 1 up end is provided with lower mould 4, the terminal surface goes up and down to be provided with mould 5 directly over lower mould 4 under roof-rack 2, the terminal surface all is provided with rectangular welt 6 under base 1 up end and the roof-rack 2, the vertical rigid coupling of roof-rack 2 up end has the cylinder 22 at two separation welt 6 length direction both ends, the piston rod of cylinder 22 runs through roof-rack 2 and with the both ends rigid coupling of neighbouring welt 6 of going up mould 5, the both ends of welt 6 length direction slide and are provided with the knot seat 7 of two relative "L" types that set up, the vertical section of knot seat 7 slides and sets up on welt 6, be provided with on welt 6 and be used for driving two knot.

Referring to fig. 1 and 2, the bottom of the upper die 5 and the bottom of the lower die 4 are fixedly connected with a convex edge 8 along the outline, the thickness of the convex edge 8 is the same as the length of the inner edge of the vertical section of the buckle seat 7, the driving device comprises a plurality of T-shaped sliding blocks 9 fixedly connected with the vertical section of the buckle seat 7 and close to one end of the lining plate 6, in the embodiment, the sliding blocks 9 are preferably three and distributed at equal intervals along the width direction of the lining plate 6, the lining plate 6 is provided with a plurality of T-shaped grooves 10 matched with the sliding blocks 9 in a sliding manner, the T-shaped grooves 10 are arranged along the length direction of the lining plate 6, a driving mechanism for driving the two sliding blocks 9 to move oppositely/reversely is arranged in the T-shaped grooves 10 in the middle part of the width direction of the lining plate 6, the driving mechanism comprises a double-head threaded rod 11 rotatably connected in the T-shaped grooves 10 and arranged along the length direction, the, one end of the double-head threaded rod 11 extends to the outer wall of the lining plate 6 and a hand wheel 12 is coaxially and fixedly connected to the end part.

When the upper die 5 and the lower die 4 are installed, the two hand wheels 12 are respectively rotated, the hand wheels 12 drive the double-threaded rod 11 to rotate when rotating, the double-threaded rod 11 drives the two sliding blocks 9 in threaded connection with the double-threaded rod 11 to synchronously move close to or far away from the two ends of the double-threaded rod 11 when rotating, so that the two sliding blocks 9 are driven to move in the T-shaped groove 10 in the opposite direction or the back direction, and then the two buckling seats 7 are driven to move in the opposite direction or the back direction until the two buckling seats 7 are adjusted to a proper distance, so that the convex edge 8 on the upper die 5 or the lower die 4 can be completely inserted into the buckling seats 7 and abutted against the inner side walls of the vertical sections of the buckling seats 7 at the two ends, and then the upper die 5 and the lower die 4 are respectively pushed on the two lining plates 6, the upper; the buckle seat 7 is arranged on the lining plate 6 through a plurality of sliding blocks 9 sliding in a plurality of T-shaped grooves 10, and the thickness of the convex edge 8 is the same as the length of the inner edge of the vertical section of the buckle seat 7, so that the upper die 5 and the lower die 4 can be clamped by the buckle seat 7, the buckle seat 7 arranged above can also provide good hanging capacity for the upper die 5, the service life of the buckle seat 7 is ensured, and the convenience in installation of a punch die is improved; when the die needs to be replaced, the upper die 5 or the lower die 4 slides between the two buckling seats 7 until the upper die 5 or the lower die 4 is taken out, and the die removing efficiency is higher, so that the effect of rapidly replacing the die by the punch is realized, meanwhile, the connecting structure of the stress of the bolt is reduced, and the phenomenon that the die replacing efficiency is influenced due to the fact that the bolt slides threads is avoided as much as possible.

Referring to fig. 2, a liner plate 6 is provided with a positioning device for positioning an upper die 5 and a lower die 4, the positioning device includes a plurality of positioning holes 15 formed on one side of the liner plate 6 close to a buckle seat 7, in this embodiment, the four positioning holes 15 are preferably selected and are connected with each other in a rectangular shape, positioning pins 16 are arranged in the positioning holes 15 in a lifting manner, in this embodiment, the positioning pins 16 and the positioning holes 15 are both square, one sides of the upper die 5 and the lower die 4 close to the liner plate 6 are both provided with a plurality of pin holes 17 corresponding to the plurality of positioning holes 15, the pin holes 17 are in splicing fit with the positioning pins 16, and the liner plate 6 is provided with; the adjusting mechanism comprises a threaded hole 18 which is formed in the side wall of the length direction of the lining plate 6 and communicated with the positioning hole 15, an adjusting screw rod 19 is connected with the threaded hole 18 in an internal thread mode, an inclined surface 20 is arranged at one side, close to the adjusting screw rod 19, of one end, far away from the buckling seat 7, of the positioning pin 16, the inclined surface 20 deviates from the buckling seat 7, the positioning pin 16 is elastically arranged in the positioning hole 15, an elastic part 21 is elastically connected between the end, close to the inclined surface 20, of the positioning pin 16 and the bottom wall of the positioning hole 15, one end of the elastic.

After the upper die 5 or the lower die 4 is buckled and connected between the two buckling seats 7, the upper die 5 and the lower die 4 are respectively moved on the two lining plates 6, pin holes 17 on the upper die 5 and the lower die 4 are respectively aligned with positioning holes 15 on the two lining plates 6, an adjusting screw 19 is rotated, the adjusting screw 19 moves in a threaded hole 18 towards a direction close to a positioning pin 16, when the adjusting screw 19 is abutted against an inclined plane 20 of the positioning pin 16 and moves continuously, the positioning pin 16 is pushed to move upwards and protrude out of the positioning hole 15 through the relative movement of the inclined plane 20 and the adjusting screw 19 so as to position the upper die 5 or the lower die 4, so that the precision of the upper die 5 and the lower die 4 during stamping is ensured, at the moment, the elastic piece 21 is stretched to generate deformation, and the convenient positioning of the upper die 5 or the; when the upper die 5 or the lower die 4 needs to be disassembled, the corresponding adjusting screw rod 19 can be rotated reversely to enable the adjusting screw rod 19 to be far away from the positioning pin 16, and the positioning pin 16 retracts into the positioning hole 15 under the action of the deformation force of the elastic piece 21, so that the upper die 5 or the lower die 4 can be slid on the lining plate 6 to realize convenient disassembly.

Referring to fig. 3, buckle and be provided with the locking means who is used for carrying out the locking to protruding edge 8 on the seat 7, locking means includes that the screw thread wears to establish the locking bolt 13 on detaining the seat 7 horizontal end, and protruding edge 8 deviates from one side of neighbouring welt 6 and offers along detaining seat 7 length direction's recess 14, recess 14 and the 13 tip adaptations of locking bolt of pegging graft. After the upper die 5 or the lower die 4 is buckled and connected between the two buckling seats 7, the locking bolt 13 is rotated, the end part of the locking bolt 13 is contacted with the convex edge 8 and is in inserted fit with the groove 14, and on one hand, the upper die 5 or the lower die 4 is preliminarily positioned; on the other hand, the arrangement of the groove 14 increases the contact area between the locking bolt 13 and the convex edge 8, so that the locking bolt 13 can conveniently press the upper die 5 or the lower die 4 against the lining plate 6, and the upper die 5 or the lower die 4 can be further firmly fixed.

The implementation principle of the embodiment is as follows:

when the upper die 5 or the lower die 4 is installed, the hand wheel 12 is rotated to drive the double-threaded rod 11 to rotate and drive the two slide blocks 9 at the two ends of the liner plate 6 in the length direction to drive the two buckling seats 7 to move oppositely or backwards to a proper distance, so that the convex edges 8 on the upper die 5 or the lower die 4 can be completely inserted into the buckling seats 7 and abutted against the inner side walls of the vertical sections of the buckling seats 7 at the two ends, the positions of the upper die 5 or the lower die 4 on the liner plate 6 are adjusted by sliding the convex edges 8 between the two buckling seats 7, the corresponding positioning pins 16 are jacked up by rotating the plurality of adjusting screws 19 to be in plug-in connection with the corresponding pin holes 17 on the upper die 5 or the lower die 4, so that the upper die 5 or the lower die 4 is positioned, the convex edges 8 on the upper die 5 or the lower die 4 are locked by the locking device, so that the upper die 5 or the lower die 4 can be stably fixed on the liner plate 6, and the convex edges 8 have the same thickness, the convenience of installing the punch die is improved; when the die needs to be replaced, the locking device and the positioning device are respectively unlocked to the upper die 5 or the lower die 4, and the upper die 5 or the lower die 4 is slid between the two buckle seats 7 until the upper die 5 or the lower die 4 is taken out, so that the die removing efficiency is improved, the effect of quickly replacing the die by the punch is realized, meanwhile, the connecting structure of bolt stress is reduced, and the phenomenon that the die replacing efficiency is influenced due to bolt thread sliding is avoided as much as possible.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a punch press convenient to change mould which characterized in that: the lifting device comprises a base (1) and a top frame (2), wherein a plurality of supporting columns (3) are fixedly connected between the base (1) and the top frame (2), a lower die (4) is arranged on the upper end face of the base (1), an upper die (5) is arranged on the lower end face of the top frame (2) in a lifting mode right above the lower die (4), rectangular lining plates (6) are arranged on the upper end face of the base (1) and the lower end face of the top frame (2), two L-shaped buckling seats (7) which are oppositely arranged are arranged in a sliding mode at two ends of the lining plates (6) in the length direction, vertical sections of the buckling seats (7) are arranged on the lining plates (6) in a sliding mode, and driving devices used for driving the two buckling seats (7) to move in the opposite direction/opposite direction are arranged on the lining plates (6); go up mould (5) with the equal rigid coupling in bottom of lower mould (4) has along protruding edge (8) of its profile, protruding edge (8) thickness with it is the same along length in detaining seat (7) vertical section, it is right to be provided with on detaining seat (7) protruding locking device who carries out the locking along (8), it is right to be provided with on welt (6) be used for going up mould (5) with lower mould (4) carry out the positioner who fixes a position.

2. The punching machine convenient for replacing the die according to claim 1, wherein: drive arrangement includes that a plurality of rigid couplings are in detain the vertical section of seat (7) and be close to slider (9) of "T" style of calligraphy of welt (6) one end, seted up on welt (6) a plurality ofly with T type groove (10) of slider (9) adaptation that slides, T type groove (10) are followed welt (6) length direction sets up, one of them be provided with in T type groove (10) and be used for driving two slider (9) the actuating mechanism of motion dorsad in opposite directions.

3. The punching machine convenient for replacing the die according to claim 2, wherein: actuating mechanism is connected including rotating double threaded rod (11) that just set up along its length direction in T type groove (10), the pitch of double threaded rod (11) both ends helicla flute is the same, spiral direction is opposite, double threaded rod (11) both ends respectively with adjacent two slider (9) threaded connection.

4. The punching machine convenient for replacing the die according to claim 3, wherein: double-end threaded rod (11) one end extends to welt (6) outer wall and in the coaxial rigid coupling of this tip hand wheel (12).

5. The punching machine convenient for replacing the die according to claim 1, wherein: the locking device comprises a locking bolt (13) which is arranged at the horizontal end of the buckle seat (7) in a penetrating mode through threads, a groove (14) which is arranged along the length direction of the buckle seat (7) is formed in the convex edge (8), and the groove (14) is matched with the end portion of the locking bolt (13) in an inserting mode.

6. The punching machine convenient for replacing the die according to claim 1, wherein: the positioning device comprises a plurality of positioning holes (15) formed in one side of the buckle seat (7) and close to the lining plate (6), positioning pins (16) are arranged in the positioning holes (15) in a lifting mode, a plurality of pin holes (17) corresponding to the positioning holes (15) are formed in one side of the lining plate (6) close to the upper die (5) and the lower die (4), and a driving mechanism is arranged on the lining plate (6) and used for driving the positioning pins (16) to protrude out of the positioning holes (15).

7. The punching machine convenient for replacing the die according to claim 6, wherein: adjustment mechanism is including seting up welt (6) lateral wall and with screw hole (18) of locating hole (15) intercommunication, screw hole (18) female connection has adjusting screw (19), locating pin (16) are kept away from the one end of detaining seat (7) is in being close to one side of adjusting screw (19) is provided with inclined plane (20), inclined plane (20) deviate from detain seat (7), locating pin (16) elasticity sets up in locating hole (15).

8. The punching machine convenient for replacing the die according to claim 7, wherein: an elastic piece (21) is elastically connected between the end part of the positioning pin (16) close to the inclined plane (20) and the bottom wall of the positioning hole (15), one end of the elastic piece (21) is fixedly connected with the positioning pin (16), and the other end of the elastic piece is fixedly connected with the bottom wall of the positioning hole (15).