CN108176755B

CN108176755B - Automatic punching device and automatic punching method thereof

Info

Publication number: CN108176755B
Application number: CN201711282763.XA
Authority: CN
Inventors: 孙福成
Original assignee: Dongfeng Motor Chassis Systems Co Ltd
Current assignee: Dongfeng Motor Chassis Systems Co Ltd
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2020-04-24
Anticipated expiration: 2037-12-07
Also published as: CN108176755A

Abstract

The application provides an automatic punching device and an automatic punching method, which comprise a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism; the blanking die comprises an upper die, and the upper die reciprocates up and down in the punching working process; in the process that the upper die moves towards the bottom dead center position, the upper die drives the linkage mechanism to move, and the gear keeps the original position under the action of the directional positioning mechanism; in the process of returning to the top dead center position, the upper die drives the gear to rotate through the linkage mechanism, and further drives a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece to synchronously rotate at a fixed angle; the cooperation blanking die accomplishes the punching a hole to the work piece in proper order, has realized need not the manual work and has gone to rotate certain angle at interval blanking in-process, makes the work piece location, and fixes a position accurately, has improved production efficiency, has reduced operation workman intensity of labour, and has reduced the dangerous problem of production of workman in operation process.

Description

Automatic punching device and automatic punching method thereof

Technical Field

The application relates to the technical field of stamping dies, in particular to an automatic punching device and an automatic punching method thereof.

Background

With the rapid development of the manufacturing industry, the demand of the market for the mold is continuously increasing. The increasing competition in the market has led to an increasing recognition of the quality, cost and importance of new product development. And the mold manufacturing is one of the most basic elements in the whole chain, and many mold enterprises increase the investment for technical progress, and the technical progress is regarded as important power for enterprise development.

As shown in fig. 5, for such products on the market with holes uniformly distributed on the shape surface along the circumferential direction, if the products are all punched at one time, the die structure is complex, the gap uniformity is difficult to guarantee, the cutting edge of the female die is easy to break, the maintenance is time-consuming and labor-consuming, the appearance quality of the process piece cannot be guaranteed, and therefore punching needs to be performed step by step at intervals. According to the traditional method, a workpiece is positioned on a lower die by a hole (a fabrication hole) (the working part of the lower die is attached to the shape surface of the workpiece), a first hole is punched, a device sliding block drives an upper die to move upwards, the part is manually rotated for a certain angle to be positioned, the device sliding block drives the upper die to move downwards to punch a second hole, and the like, so that the punching of all the holes is completed.

The prior art needs the manual work to go constantly to rotate certain angle at interval blanking in-process, makes the work piece location, just so causes production efficiency low, increases operation workman intensity of labour, and brings the dangerous problem of production for the workman in operation process.

Disclosure of Invention

The application provides an automatic punching device and an automatic punching method, which aim to solve the problems that in the prior art, in the interval blanking process, a worker needs to continuously rotate for a certain angle to position a workpiece, so that the production efficiency is low, the labor intensity of an operator is increased, and the production danger is brought to the worker in the operation process.

The application provides an automatic punching device which comprises a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism;

the blanking die comprises an upper die, and the upper die reciprocates up and down in the punching working process;

the rotating mechanism comprises a rotating shaft and a gear, and the gear is sleeved on the rotating shaft so as to drive the rotating shaft to rotate synchronously;

one end of the linkage mechanism is connected to the upper die, and the other end of the linkage mechanism is connected to the gear in the rotating mechanism;

in the process of the movement of the upper die returning to the top dead center position, the upper die drives the gear to rotate through the linkage mechanism, and further drives a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece to synchronously rotate at a fixed angle; in the process that the upper die moves towards the bottom dead center position, the upper die drives the linkage mechanism to move, and the gear keeps the original position under the action of the directional positioning mechanism.

Optionally, the upper die of the blanking die includes: the device comprises an upper bottom plate, a male die fixing plate and a stripper plate;

the lower end face of the upper base plate is connected with one end of the punch fixing plate, the stripper plate is sleeved at the other end of the punch fixing plate, the punches are sequentially embedded in the stripper plate and the punch fixing plate, the stripper plate and the punches are connected along the up-and-down movement direction of the upper die;

when the upper die is at the upper dead center position, the workpiece is arranged on the material supporting positioning plate, the upper die runs downwards, the stripper plate compresses the workpiece, when the upper die runs to the lower dead center position, the male die finishes one-time punching of the workpiece, the upper die returns to the upper dead center position, and the operation is continued for the next-time punching.

Optionally, the blanking die further includes a lower die, and the lower die includes: the lower bottom plate, the female die fixing plate, the lower die floating plate and the limiting mechanism;

the upper end surface of the lower bottom plate is connected with one end of the female die fixing plate, the female die is embedded in the female die fixing plate, and the female die fixing plate and the female die are sequentially connected along the up-and-down movement direction of the upper die; the rotating mechanism and the directional positioning mechanism are respectively arranged on the lower die floating plate, and the lower die floating plate is connected to the lower die through the limiting mechanism; when the linkage mechanism drives the rotating mechanism to rotate, the lower die floating plate is fixed through the limiting mechanism.

Optionally, comprising: the limiting mechanism comprises a rubber block and a limiting rod;

the bottom of the lower die floating plate is connected to the lower bottom plate through the rubber block, and one side of the lower die floating plate is connected to the female die fixing plate through the limiting rod;

and one side of the lower die floating plate is the side of the female die fixing plate opposite to the lower die floating plate.

Optionally, the linkage mechanism comprises a connecting rod swing arm mechanism and a shifting tooth limiting mechanism;

one end of the linkage mechanism is connected with the upper die and is connected with the upper die through one end of the connecting rod swing arm mechanism; the other end of the connecting rod swing arm mechanism is connected with the shifting tooth limiting mechanism;

in the process of reciprocating motion of the upper die, the connecting rod swing arm mechanism swings along with the upper die to drive the shifting tooth limiting mechanism to rotate;

the shifting tooth limiting mechanism is provided with a shifting tongue; the other end of the linkage mechanism is connected with the gear in the rotating mechanism, and the shifting tongue is meshed with the gear on the rotating shaft sleeved in the rotating mechanism.

Optionally, the directional positioning mechanism includes more than one positioning hole and a bevel pin, the positioning holes are disposed on the lower end surface of the gear, and the positioning holes are spaced at a predetermined angle; the bevel pin is matched with the positioning hole, is arranged at a fixed position opposite to the positioning hole on the gear, is positioned on the upper end face of the lower die floating plate and can slide up and down under the action of a spring in the bevel pin; the bevel pin limits the gear and enables the gear to rotate in a fixed angle and a single direction.

Optionally, the bevel pin is used for limiting the gear and enabling the gear to rotate in a fixed-angle unidirectional manner, and the method specifically includes:

when the upper die moves from the top dead center position to the bottom dead center position, the bevel pin slides into the positioning hole, so that the gear keeps the original position, and meanwhile, the shifting tongue slides into an adjacent tooth groove from the current tooth groove of the gear;

when the upper die moves from the bottom dead center position to the top dead center position, the gear rotates under the action of the shifting tongue, the lower end face of the gear is sequentially contacted with the lower end to the upper end of the bevel pin, and meanwhile, the bevel pin slides out of the current positioning hole and slides into the adjacent positioning hole, so that the gear rotates in a fixed-angle one-way mode.

Optionally, comprising: the number of the positioning holes is the same as the number of the teeth of the gear and the number of the punching holes of the workpiece.

Optionally, the link swing arm mechanism comprises: the device comprises an upper connecting rod, a lower connecting rod, an upper rotating shaft, a middle rotating shaft, a lower rotating shaft and a swing arm;

one end of the connecting rod swing arm mechanism is connected with the upper die, and particularly one end of the upper connecting rod is connected with the upper die of the blanking die through the upper rotating shaft; the other end of the upper connecting rod is connected to one end of the lower connecting rod through the middle rotating shaft; the other end of the lower connecting rod and one end of the swing arm are connected to the lower bottom plate through the lower rotating shaft, the other end of the connecting rod swing arm mechanism is connected to the shifting tooth limiting mechanism, and specifically, the other end of the swing arm is provided with a meshing structure meshed with the shifting tooth limiting mechanism;

the upper die drives the upper connecting rod to move, the upper connecting rod drives the lower connecting rod to wind the lower rotating shaft to rotate, the lower rotating shaft drives the swing arm to rotate, and the swing arm drives the gear shifting limiting mechanism to wind the rotating shaft to rotate.

Optionally, the engaging structure is a U-shaped groove or a square groove.

Optionally, comprising: the other end of the upper connecting rod is connected with one end of the lower connecting rod through the middle rotating shaft, and the structure is specifically adopted as follows: and one end of the upper connecting rod, which is connected with the transfer shaft, is provided with a sliding chute, and the transfer shaft slides in the sliding chute and reciprocates along with the upper connecting rod so as to drive the lower connecting rod to swing.

Optionally, the shifting tooth limiting mechanism further comprises a shifting rod and a shifting plate;

one end of the shifting rod is fixed in the shifting plate, the other end of the shifting rod is arranged outside the shifting plate, and a connecting structure matched with the meshing structure at one end of the swing arm is arranged;

the shifting tongue is fixed in the shifting plate, and a compression spring is also arranged in the shifting tongue and can enable the shifting tongue to slide towards the direction meshed with the gear;

the shifting plate is sleeved on a rotating shaft in the rotating mechanism and drives the rotating shaft to rotate through the meshing of the shifting tongue and the gear.

Optionally, comprising: the connecting structure is of a ball head structure, and the ball head structure is matched with the U-shaped groove or the square groove of the swing arm.

Optionally, the blanking die further includes: a guide sleeve and a guide pillar;

the guide sleeve is arranged on the lower end face of the upper bottom plate, the guide pillar is arranged on the upper end face of the lower bottom plate, and the guide pillar is sleeved with the guide sleeve; and in the process of reciprocating the upper die up and down, the guide sleeve synchronously reciprocates up and down along the guide post along with the upper die.

Optionally, comprising: a bearing or shaft sleeve; the lower die floating plate is arranged in the lower die;

the lower end of the rotating shaft is connected to the lower die floating plate through the bearing or the shaft sleeve;

the gear is connected to the middle of the rotating shaft and is located above the lower die floating plate.

Optionally, the material supporting positioning plate is fixed at the upper end of the rotating shaft through a first positioning key; the gear is fixed on the rotating shaft through a second positioning key.

Optionally, comprising: and the at least two positioning pins are used for fixing a workpiece to be processed and are arranged on the material supporting positioning plate.

The application also provides an automatic punching method, the automatic punching device for punching the workpiece is adopted to punch the workpiece, and the device comprises a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism; the method specifically comprises the following steps:

dividing the workpiece into N times of blanking according to the number of the holes uniformly distributed in the circumferential direction of the workpiece;

in the process that the upper die moves from the top dead center position to the bottom dead center position for the first time, the linkage mechanism is driven to swing through the upper die, the gear keeps the original position under the action of the directional positioning mechanism, and when the upper die moves to the bottom dead center position, the first punching of the workpiece is completed;

in the process that the upper die returns from the lower dead center position to the upper dead center position, the upper die drives the gear to rotate through the linkage mechanism, so that a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece is driven to rotate at a fixed angle synchronously, and the upper die reaches the upper dead center position to finish a cycle process of punching;

and the upper die performs reciprocating motion for the second time and the third time in sequence until the workpiece is processed after the Nth blanking is completed.

Optionally, one cycle of the punching by the upper die specifically includes:

the linkage mechanism comprises a connecting rod swing arm mechanism and a shifting tooth limiting mechanism, and the directional positioning mechanism is a groove pin and a positioning hole;

the connecting rod swing arm mechanism is provided with an upper connecting rod, a lower connecting rod, an upper rotating shaft, a middle rotating shaft, a lower rotating shaft and a swing arm; the shifting tooth limiting mechanism is provided with a shifting tongue, a shifting rod and a shifting plate;

in the process that the upper die moves from the top dead center position to the bottom dead center position for the first time, the upper die drives the upper connecting rod to move downwards, the upper connecting rod drives the lower connecting rod to rotate around the lower rotating shaft in the anticlockwise direction through the middle rotating shaft, and the lower rotating shaft drives the swing arm to rotate anticlockwise by a first preset angle; the swing arm pulls the gear shifting mechanism to rotate clockwise around the rotating shaft; the gear keeps the original position under the matching of the groove pin and the positioning hole, and the shifting tongue slides into the adjacent second tooth groove from the first tooth groove of the gear; when the gear does not rotate, the rotating mechanism and the workpiece do not rotate, the upper die compresses the workpiece, and a first hole is punched;

then, the upper die drives the upper connecting rod to move upwards, and the upper connecting rod drives the lower connecting rod to rotate clockwise around the lower rotating shaft; the lower rotating shaft drives the swing arm to rotate clockwise by the first preset angle, the swing arm toggles the gear shifting mechanism to rotate anticlockwise around the rotating shaft, and the gear rotates anticlockwise by a second preset angle around the rotating shaft under the action of a shifting tongue of the gear shifting mechanism; meanwhile, the bevel pin slides into the adjacent second positioning hole from the first positioning hole on the lower end face of the gear; the gear drives the rotating shaft, and the rotating shaft drives the workpiece on the material supporting positioning plate to rotate by a corresponding angle so as to position the workpiece; and the upper die reaches the top dead center position to complete a punching cycle.

Optionally, N is an integer greater than or equal to 1.

Compared with the prior art, the method has the following advantages: the application provides an automatic punching device and an automatic punching method, which comprise a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism; the blanking die comprises an upper die, and the upper die reciprocates up and down in the punching working process; the rotating mechanism comprises a rotating shaft and a gear, and the gear is sleeved on the rotating shaft so as to drive the rotating shaft to rotate synchronously; one end of the linkage mechanism is connected to the upper die, and the other end of the linkage mechanism is connected to the gear in the rotating mechanism; in the process that the upper die moves towards the bottom dead center position, the upper die drives the linkage mechanism to move, and the gear keeps the original position under the action of the directional positioning mechanism; in the process of the movement of the upper die returning to the top dead center position, the upper die drives the gear to rotate through the linkage mechanism, and further drives a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece to synchronously rotate at a fixed angle; the cooperation blanking die accomplishes the punching a hole to the work piece in proper order, has realized need not the manual work and has gone to rotate certain angle at interval blanking in-process, makes the work piece location, and fixes a position accurately, has improved production efficiency, has reduced operation workman intensity of labour, and has reduced the dangerous problem of production of workman in operation process.

Drawings

FIG. 1 is a schematic structural view of an embodiment of an automated punch apparatus provided herein;

FIG. 2 is a cross-sectional view of an embodiment of an automated punch apparatus provided herein;

FIG. 3 is a schematic structural diagram of a link swing arm mechanism for an embodiment of an automated punching apparatus provided herein;

FIG. 4 is a schematic structural diagram of a tooth shifting and limiting mechanism for an embodiment of an automatic punching device provided by the present application;

FIG. 5 is a schematic diagram of a resulting product configuration for an embodiment of an automated punch apparatus provided herein;

fig. 6 is a schematic flow chart of an automatic punching method according to an embodiment of the present application.

Wherein, the blanking die 1, the upper die 1-1, the upper bottom plate 1-1-1, the male die 1-1-2, the male die fixing plate 1-1-3 and the stripper plate 1-1-4; 1-2 parts of a lower die, 1-2-1 parts of a lower bottom plate, 1-2-2 parts of a female die, 1-2-3 parts of a female die fixing plate, 1-2-4 parts of a lower die floating plate, 1-2-5 parts of a rubber block and 1-2-6 parts of a limiting rod;

the device comprises a linkage mechanism 2, a connecting rod swing arm mechanism 2-1, an upper connecting rod 2-1-1, a lower connecting rod 2-1-2, an upper rotating shaft 2-1-3, a middle rotating shaft 2-1-4, a lower rotating shaft 2-1-5 and a swing arm 2-1-6; the shifting block mechanism is 2-2, the shifting tongue is 2-2-1, the shifting rod is 2-2-2, and the shifting plate is 2-2-3;

the device comprises a rotating mechanism 3, a rotating shaft 3-1, a gear 3-2 and a material supporting positioning plate 3-3; the positioning mechanism 4, the positioning hole 4-1 and the bevel pin 4-2 are arranged in the groove; the automatic punching device comprises a guide sleeve 5, a guide pillar 6, a bearing 7, a first positioning key 8, a second positioning key 9, a positioning pin 10, a workpiece 11 and an automatic punching device 12.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.

The application provides a be used for automatic punching device has realized need not the manual work and has gone to rotate certain angle at interval blanking in-process, makes work piece automatic positioning, has improved production efficiency, has reduced operation workman intensity of labour, and has reduced workman's the dangerous problem of production in operation process.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of an automatic punching apparatus provided in the present application.

As shown in fig. 1 and fig. 2, an embodiment of the present application provides an automatic punching apparatus 12, which includes a blanking die 1, a linkage mechanism 2, a rotating mechanism 3, and an orientation positioning mechanism 4; the blanking die 1 comprises an upper die 1-1, and the upper die 1-1 reciprocates up and down in the punching working process; the rotating mechanism 3 comprises a rotating shaft 3-1 and a gear 3-2, and the gear 3-2 is sleeved on the rotating shaft 3-1 to drive the rotating shaft 3-1 to rotate synchronously; one end of the linkage mechanism 2 is connected to the upper die 1-1, and the other end of the linkage mechanism is connected to the gear 3-2 in the rotating mechanism 3;

in the process of returning the upper die 1-1 to the top dead center position, the upper die 1-1 drives the gear 3-2 to rotate through the linkage mechanism 2, and further drives the material supporting positioning plate 3-3 fixed at the upper end of the rotating shaft 3-1 and used for bearing the workpiece 11 to synchronously rotate at a fixed angle; in the process that the upper die 1-1 moves towards the bottom dead center position, the upper die 1-1 drives the linkage mechanism 2 to move, and the gear 3-2 keeps the original position under the action of the directional positioning mechanism 4.

The reciprocating motion of going up mould 1-1 drives link gear 2 is passed through to this application to make gear 3-2 drive under positioning mechanism's the fixed 3-3 synchronous fixed angle rotations of the material locating plate that hold in the palm that is used for bearing work piece 11 in rotation axis 3-1 upper end, the completion is right a plurality of punching a hole of work piece 11.

Specifically, as shown in fig. 2, a cross-sectional view of an automatic punching apparatus according to an embodiment of the present application is provided.

Wherein, last mould 1-1 of blanking die 1 includes: the device comprises an upper bottom plate 1-1-1, a male die 1-1-2, a male die fixing plate 1-1-3 and a stripper plate 1-1-4; the lower end face of the upper base plate 1-1-1 is connected with one end of the punch retainer 1-1-3, the stripper plate 1-1-4 is sleeved at the other end of the punch retainer 1-1-3, the punches 1-1-2 are sequentially embedded in the stripper plate 1-1-4 and the punch retainer 1-1-3, the stripper plate 1-1-4 and the punches 1-1-2 are connected along the up-and-down movement direction of the upper die 1-1.

In order to facilitate the punching of the automatic punching device 12, in the embodiment of the present application, the punch retainer 1-1-3, the stripper plate 1-1-4 and the punch 1-1-2 are disposed at the middle position of the lower end surface of the upper base plate 1-1-1, the punch 1-1-2 is fixed in the stripper plate 1-1-4 and the punch retainer 1-1-3 by bolts, and the punch retainer 1-1-3 is connected with the lower base plate 1-2-1 by bolts; certainly, in order to enable the stripper plate 1-1-4 and the punch retainer plate 1-1-3 to be connected more stably, the stripper plate and the punch retainer plate can also be connected through bolts, so that the structures are not only stable and do not fall off in the punching process, but also convenient to disassemble and assemble when the punches 1-1-2 are replaced, the operation flexibility is improved, and the connection structure is more convenient compared with some integrated punch connecting structures.

It should be noted that, as a driving structure of the automatic punching apparatus 12, the upper die 1-1 can reciprocate up and down during the punching operation and is mainly driven by an apparatus slider, and the apparatus slider is usually configured to slide in a direction perpendicular to the mold opening and closing direction or in a certain angle with the mold opening and closing direction during the mold opening operation of the mold. When the workpiece product structure causes the die to be incapable of normal demoulding without adopting a slide block, the equipment slide block is needed. The material of the equipment sliding block has proper hardness and abrasion resistance and is enough to bear the friction of movement. The slider is not the focus of the invention of the present application based on the apparatus and will not be explained in detail here. In the embodiment of the application, the device sliding block is fixedly connected above the upper bottom plate 1-1-1 of the upper die 1-1 through a T-shaped bolt and slides along the up-and-down running direction of the upper die 1-1.

In order to complete the punching by matching with the upper die 1-1, the blanking die 1 further comprises a lower die 1-2, and the lower die 1-2 comprises: the device comprises a lower bottom plate 1-2-1, a female die 1-2-2, a female die fixing plate 1-2-3, a lower die floating plate 1-2-4 and a limiting mechanism.

Specifically, the upper end face of the lower bottom plate 1-2-1 is connected with one end of the female die fixing plate 1-2-3, the female die 1-2-2 is embedded in the female die fixing plate 1-2-3, and the female die fixing plate 1-2-3 and the female die 1-2-2 are sequentially connected along the up-and-down movement direction of the upper die 1-1; the rotating mechanism 3 and the directional positioning mechanism 4 are respectively arranged on the lower die floating plate 1-2-4, and the lower die floating plate 1-2-4 is connected to the lower die 1-2 through the limiting mechanism; when the linkage mechanism 2 drives the rotating mechanism 3 to rotate, the lower die floating plate 1-2-4 is fixed through the limiting mechanism.

In the embodiment of the present invention, the plate surface of the lower floating plate 1-2-4 is inclined, the orientation positioning mechanism 4 is disposed on the lower floating plate 1-2-4, the axial direction of the rotating shaft 3-1 of the rotating mechanism 3 is perpendicular to the plate surface of the lower floating plate 1-2-4, and in order to allow the rotating shaft 3-1 to rotate stably, a bearing 7 or a sleeve is disposed in the lower floating plate 1-2-4, the lower end of the rotating shaft 3-1 is connected to the lower floating plate 1-2-4 through the bearing 7 or the sleeve, so that the friction between the rotating shaft 3-1 and the lower floating plate 1-2-4 is reduced, the service life of the rotating shaft 3-1 is improved, the rotational accuracy of the rotary shaft 3-1 is also indirectly improved.

In order to prevent the lower die floating plate 1-2-4 from moving along with the rotation of the linkage mechanism 2 in the process of punching, the lower die floating plate 1-2-4 is limited and fixed by the limiting mechanism in the embodiment of the application, and the limiting mechanism is a rubber block 1-2-5 and a limiting rod 1-2-6; the bottom of the lower die floating plate 1-2-4 is connected to the lower bottom plate 1-2-1 through the rubber block 1-2-5, and one side of the lower die floating plate 1-2-4 is connected to the female die fixing plate 1-2-3 through the limiting rod 1-2-6; one side of the lower die floating plate 1-2-4 is the side of the female die fixing plate 1-2-3 opposite to the lower die floating plate 1-2-4.

The rubber block 1-2-5 is arranged at the bottom of the lower die floating plate 1-2-4 and connected to the lower bottom plate 1-2-1 of the lower die 1-2 through the rubber block 1-2-5, and the rubber block 1-2-5 not only limits and fixes the lower die floating plate 1-2-4, but also plays a role in shock absorption and buffering, thereby prolonging the service life of the automatic punching device 12; next, as shown in fig. 2, in the present embodiment, the stopper rod 1-2-6 is horizontally disposed, mainly for horizontally stopping the lower floating plate 1-2-4. One end of the limiting rod 1-2-6 is connected to one side of the lower die floating plate 1-2-4, the other end of the limiting rod is connected to the female die fixing plate 1-2-3, and the end is arranged to be a movable structure in order to match with the buffering of the rubber block 1-2-5, namely the end can be connected through a movable shaft, and the rotating range is determined according to the vertical vibration amplitude of the lower die floating plate 1-2-4.

In order to make the punching direction of the male die 1-1-2 accurate, the upper die 1-1 needs to run on the same running straight line (track) when reciprocating, so the blanking die 1 further comprises a guide sleeve 5 and a guide post 6.

Specifically, the guide sleeve 5 is arranged on the lower end face of the upper bottom plate 1-1-1, the guide pillar 6 is arranged on the upper end face of the lower bottom plate 1-2-1, and the guide pillar 6 is sleeved with the guide sleeve 5; in the process of the up-and-down reciprocating motion of the upper die 1-1, the guide sleeve 5 synchronously reciprocates up and down along the guide post 6 along with the upper die 1-1. As shown in fig. 1, the guide sleeves 5 and the guide posts 6 are 2 groups and symmetrically arranged between the upper die 1-1 and the lower die 1-2, and of course, the number groups of the guide posts 6 and the guide sleeves 5 are not unique, and the number does not affect the protection scope of the embodiments of the present application.

Under the drive of the upper die 1-1, the gear 3-2 is driven to rotate through the linkage mechanism 2 so as to drive the rotating mechanism 3 to rotate.

Specifically, the linkage mechanism 2 comprises a connecting rod swing arm mechanism 2-1 and a shifting tooth limiting mechanism 2-2; one end of the linkage mechanism 2 is connected with the upper die 1-1 and is connected with the upper die 1-1 through one end of the connecting rod swing arm mechanism 2-1; the other end of the connecting rod swing arm mechanism 2-1 is connected with the shifting tooth limiting mechanism 2-2; in the process of reciprocating motion of the upper die 1-1, the connecting rod swing arm mechanism 2-1 swings along with the upper die to drive the shifting tooth limiting mechanism 2-2 to rotate; the shifting tooth limiting mechanism 2-2 is provided with a shifting tongue 2-2-1; the other end of the linkage mechanism 2 is connected with the gear 3-2 in the rotating mechanism 3, so that the poking tongue 2-2-1 is meshed with the gear 3-2 on the rotating shaft 3-1 sleeved in the rotating mechanism 3.

As shown in fig. 3, the link swing arm mechanism 2-1 includes: an upper connecting rod 2-1-1, a lower connecting rod 2-1-2, an upper rotating shaft 2-1-3, a middle rotating shaft 2-1-4, a lower rotating shaft 2-1-5 and a swing arm 2-1-6.

One end of the connecting rod swing arm mechanism 2-1 is connected with the upper die 1-1, and specifically, one end of the upper connecting rod 2-1-1 is connected with the upper die 1-1 of the blanking die 1 through the upper rotating shaft 2-1-3; the other end of the upper connecting rod 2-1-1 is connected to one end of the lower connecting rod 2-1-2 through the middle rotating shaft 2-1-4; the other end of the lower connecting rod 2-1-2 and one end of the swing arm 2-1-6 are connected to the lower bottom plate 1-2-1 together through the lower rotating shaft 2-1-5, the other end of the connecting rod swing arm mechanism 2-1 is connected to the gear shifting limiting mechanism 2-2, and particularly, the other end of the swing arm 2-1-6 is provided with an engaging structure engaged with the gear shifting limiting mechanism 2-2; the engaging structure is a U-shaped groove or a square groove. The upper die 1-1 drives the upper connecting rod 2-1-1 to move, the upper connecting rod 2-1-1 drives the lower connecting rod 2-1-2 to rotate around the lower rotating shaft 2-1-5 through the middle rotating shaft 2-1-4, the lower rotating shaft 2-1-5 drives the swing arm 2-1-6 to rotate, and the swing arm 2-1-6 drives the tooth shifting limiting mechanism 2-2 to rotate around the rotating shaft 3-1.

It should be noted that, when the automatic punching apparatus 12 does not punch a hole, the engaging structure and the connecting structure are in a separated state, that is, the engaging structure and the connecting structure are independent from each other and do not have any connection; when the automatic punching device 12 punches a hole, the meshing structure and a connecting structure described below are in a meshing state, so that the connecting rod swing arm mechanism 2-1 drives the shifting tooth limiting mechanism 2-2 to rotate.

In order to make the swinging of the lower connecting rod 2-1-2 more flexible, the other end of the upper connecting rod 2-1-1 is connected to one end of the lower connecting rod 2-1-2 through the middle rotating shaft 2-1-4, and the swinging mechanism is specifically realized by adopting the following structure: one end of the upper connecting rod 2-1-1, which is connected with the middle rotating shaft 2-1-4, is provided with a sliding chute, and the middle rotating shaft 2-1-4 slides in the sliding chute and reciprocates along with the upper connecting rod 2-1-1 to drive the lower connecting rod 2-1-2 to swing.

As the shifting tooth limiting mechanism 2-2 connected and driven by the connecting rod swing arm mechanism 2-1, as shown in fig. 4, the shifting tooth limiting mechanism 2-2 further comprises a shifting rod 2-2-2 and a shifting plate 2-2-3; one end of the driving lever 2-2-2 is fixed in the driving plate 2-2-3, the other end of the driving lever is arranged outside the driving plate 2-2-3, and a connecting structure matched with the meshing structure at one end of the swing arm 2-1-6 is arranged; the shifting tongue 2-2-1 is fixed in the shifting plate 2-2-3, and a compression spring is also arranged in the shifting tongue 2-2-1, so that the shifting tongue 2-2-1 can slide in the direction meshed with the gear 3-2; the shifting plate 2-2-3 is sleeved on a rotating shaft 3-1 in the rotating mechanism 3, and the rotating shaft 3-1 is driven to rotate through the meshing of the shifting tongue 2-2-1 and the gear 3-2. In this embodiment, the connecting structure is a ball head structure; the ball head structure is matched with the U-shaped groove or the square groove of the swing arm 2-1-6, the ball head structure can move relatively in the U-shaped groove or the square groove to drive the shifting gear limiting mechanism 2-2 to rotate, and the meshing position is A; in this embodiment, the shift lever having the ball-end structure as the connection structure is referred to as a ball-end shift lever.

As a structure directly connected to the workpiece 11, as shown in fig. 2, the gear 3-2 of the rotating mechanism 3 is disposed in the middle of the rotating shaft 3-1 and above the lower die floating plate 1-2-4; in order to make the gear 3-2 more stable, the gear 3-2 is fixed on the rotating shaft 3-1 through a second positioning key 9; the number of the second positioning keys 9 may be one or more. The material supporting positioning plate 3-3 is arranged above the gear 3-2, namely the upper end of the rotating shaft 3-1, the shifting plate 2-2-3 of the gear shifting limiting mechanism 2-2 is arranged above the gear 3-2, the material supporting positioning plate 3-3 is arranged above the shifting plate 2-2-3, similarly, the material supporting positioning plate 3-3 is arranged on the rotating shaft 3-1 for stabilizing the material supporting positioning plate 3-3, the material supporting positioning plate 3-3 is fixed at the upper end of the rotating shaft 3-1 through a first positioning key 8, and the number of the first positioning keys 8 can be one or multiple. The material supporting positioning plate 3-3 is further provided with at least two positioning pins 10 for fixing a workpiece 11 to be processed, so that the workpiece 11 is positioned and stably fixed on the material supporting positioning plate 3-3.

It should be noted that the automatic punching apparatus 12 according to the embodiment of the present invention can automatically perform punching, that is, it is not necessary to manually convey and position the workpiece 11, and therefore, the embodiment of the present invention is provided with the orientation positioning mechanism 4 after the above-described mechanisms are provided. The mechanism not only realizes the fixed-angle unidirectional rotation of the gear 3-2, but also realizes the automatic positioning of the workpiece 11.

Specifically, the directional positioning mechanism 4 comprises more than one positioning hole 4-1 and a bevel pin 4-2, the positioning hole 4-1 is arranged on the lower end face of the gear 3-2, and the positioning holes 4-1 are spaced at a preset angle; the bevel pin 4-2 is matched with the positioning hole 4-1, is arranged at a fixed position opposite to the positioning hole 4-1 on the gear 3-2, is positioned on the upper end face of the lower die floating plate 1-2-4, and can slide up and down under the action of a spring in the bevel pin 4-2; the bevel pin 4-2 limits the gear 3-2 and enables the gear 3-2 to rotate in a fixed angle and a single direction.

The bevel pin 4-2 limits the gear 3-2 and enables the gear 3-2 to rotate in a fixed angle and a single direction, and the method specifically comprises the following steps: when the upper die 1-1 moves from the top dead center position to the bottom dead center position, the bevel pin 4-2 slides into the positioning hole 4-1, so that the gear 3-2 does not rotate, and meanwhile, the shifting tongue 2-2-1 is shifted into an adjacent tooth groove from the current tooth groove of the gear 3-2; it should be noted that the bevel pin 4-2 slides into the positioning hole 4-1 to make the gear 3-2 not rotate, because the spring is arranged inside the bevel pin 4-2, and at this time, the spring is in a pulling state, that is, a supporting force is given to the bevel pin 4-2, so that the bevel pin 4-2 is clamped in the positioning hole 4-1 to make the gear 3-2 not rotate.

When the upper die 1-1 moves from the bottom dead center position to the top dead center position, the gear 3-2 rotates under the action of the toggle tongue 2-2-1, the lower end surface of the gear 3-2 is sequentially contacted with the lower end to the higher end of the bevel pin 4-2 (the bevel is shaped so as to have the lower end and the higher end), based on the spring arranged inside the bevel pin 4-2, when the gear 3-2 rotates, the lower end surface of the gear 3-2 is contacted with the bevel pin 4-2, the bevel pin 4-2 is compressed by the action of the pressure of the lower end surface of the gear 3-2, so that the bevel pin 4-2 slides out of the current positioning hole 4-1 and slides into the adjacent positioning hole 4-1, so that the gear 3-2 rotates in a single direction at a certain angle. In order to achieve accurate positioning of the punched holes, in the embodiment of the present application, the number of the positioning holes 4-1 is the same as the number of teeth of the gear 3-2 and the number of punched holes of the workpiece 11.

In order to more clearly illustrate the working principle of the automatic punching device 12, the following description is made by way of specific application scenarios.

When punching is needed, a worker places a workpiece 11 to be punched on the supporting positioning plate 3-3 and positions the workpiece 11 through the positioning pin 10. Then, the worker starts the automatic punching device 12, the equipment slide block slides from the top dead center position to the bottom dead center position, and then drives the upper die 1-1 to move from the top dead center to the bottom dead center position, in the running process, the male die 1-1-2 gradually approaches to the workpiece 11, and under the action of pressure, the workpiece 11 is in conformity with the shape surface (the specific position of punching) of the female die 1-2-2; meanwhile, the upper die 1-1 drives the upper connecting rod 2-1-1 to move downwards, the middle rotating shaft 2-1-4 slides from the lower end to the upper end of the sliding chute, so that the lower connecting rod 2-1-2 is driven by the middle rotating shaft 2-1-4 to swing by a corresponding angle, and the lower rotating shaft 2-1-5 drives the swing arm to rotate by a corresponding angle; further, the U-shaped groove is meshed with the ball head connecting rod, so that the gear shifting limiting mechanism 2-2 rotates around the rotating shaft 3-1, at the moment, a bevel pin 4-2 of the directional positioning mechanism 4 is matched with the positioning hole 4-1, the bevel pin 4-2 is embedded into the positioning hole 4-1, the gear 3-2 is not rotated (kept in a normal position), and the shifting tongue 2-2-1 slides into an adjacent gear groove from a current gear groove along the meshing direction of the gear 3-2. Since the gear 3-2 does not rotate, the rotating mechanism 3 does not rotate, and then the workpiece 11 does not rotate, the stripper plate 1-1-4 presses the workpiece 11, and the first hole is punched out under the action of the punch 1-1-2. Then, the upper die 1-1 returns from the bottom dead center position to the top dead center position, and the stripper plate 1-1-4 withdraws the waste materials punched by the workpiece 11; in the process of returning, the upper die 1-1 continues to drive the upper connecting rod 2-1-1 to move upwards, the middle rotating shaft 2-1-4 slides from the upper end to the lower end of the sliding chute, so that the lower connecting rod 2-1-2 is driven by the middle rotating shaft 2-1-4 to swing by a corresponding angle (the angle direction is opposite to that when the upper die 1-1 descends, the angle number is the same), and the lower rotating shaft 2-1-5 drives the swing arm 2-1-6 to rotate by a corresponding angle (the angle direction is opposite to that when the upper die 1-1 descends, the angle number is the same); further, the U-shaped groove is meshed with the ball head connecting rod, so that the gear shifting limiting mechanism 2-2 rotates around the rotating shaft 3-1 (the rotating direction is opposite to that when the upper die 1-1 moves downwards), at the moment, the gear 3-2 rotates by a corresponding angle under the shifting of the shifting tongue 2-2-1, the bevel pin 4-2 of the directional positioning mechanism 4 is matched with the positioning hole 4-1, and the bevel pin 4-2 is under the action of the pressure of the lower end face of the gear 3-2 to compress a spring inside the bevel pin 4-2, so that the bevel pin 4-2 slides out of the current positioning hole 4-1 and slides into the adjacent positioning hole 4-1, and the gear 3-2 rotates in a unidirectional mode at a fixed angle; further, the gear 3-2 drives the rotating shaft 3-1 to rotate, and simultaneously the material supporting positioning plate 3-3 at the upper end of the rotating shaft 3-1 drives the workpiece 11 to synchronously rotate at a fixed angle; namely, the automatic and accurate positioning of the workpiece 11 is realized.

The automatic punching device 12 continues to cycle the above steps to realize all punching of the workpiece 11, as shown in fig. 5, which is a schematic structural diagram of a formed product.

The application provides an automatic punching device which comprises a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism; the blanking die comprises an upper die, and the upper die reciprocates up and down in the punching working process; the rotating mechanism comprises a rotating shaft and a gear, and the gear is sleeved on the rotating shaft so as to drive the rotating shaft to rotate synchronously; one end of the linkage mechanism is connected to the upper die, and the other end of the linkage mechanism is connected to the gear in the rotating mechanism; in the process that the upper die moves towards the bottom dead center position, the upper die drives the linkage mechanism to move, and the gear keeps the original position under the action of the directional positioning mechanism; in the process of the movement of the upper die returning to the top dead center position, the upper die drives the gear to rotate through the linkage mechanism, and further drives a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece to synchronously rotate at a fixed angle; the cooperation blanking die accomplishes the punching a hole to the work piece in proper order, has realized need not the manual work and has gone to rotate certain angle at interval blanking in-process, makes the work piece location, and fixes a position accurately, has improved production efficiency, has reduced operation workman intensity of labour, and has reduced the dangerous problem of production of workman in operation process.

The application also provides an automatic punching method, the automatic punching device for punching the workpiece is adopted to punch the workpiece, and the device comprises a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism.

And S101, dividing the workpiece into N times of blanking according to the number of the holes uniformly distributed in the circumferential direction of the workpiece.

And S102, in the process that the upper die moves from the top dead center position to the bottom dead center position for the first time, the linkage mechanism is driven to swing through the upper die, the gear keeps the original position under the action of the directional positioning mechanism, and when the upper die moves to the bottom dead center position, the first punching of the workpiece is completed.

Step S103, in the process that the upper die returns from the lower dead center position to the upper dead center position, the upper die drives the gear to rotate through the linkage mechanism, so that a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece is driven to synchronously rotate at a fixed angle, the upper die reaches the upper dead center position, and a cycle process of punching is completed; the upper die performs reciprocating motion for the second time and the third time in sequence until the workpiece is processed after the Nth blanking is completed; and N is an integer greater than or equal to 1.

One cycle process of punching the upper die specifically comprises the following steps:

in the process that the upper die moves from the upper dead center position to the lower dead center position for the first time, the upper die drives the upper connecting rod to move downwards, the upper connecting rod drives the lower connecting rod to rotate around the lower rotating shaft in the anticlockwise direction through the middle rotating shaft, and the lower rotating shaft drives the swing arm to rotate anticlockwise by a first preset angle; the swing arm pulls the gear shifting mechanism to rotate clockwise around the rotating shaft; the gear keeps the original position under the matching of the groove pin and the positioning hole, and the shifting tongue slides into the adjacent second tooth groove from the first tooth groove of the gear; when the gear does not rotate, the rotating mechanism and the workpiece do not rotate, the upper die compresses the workpiece, and a first hole is punched;

The first predetermined angle and the second predetermined angle may be set according to actual operation, and are not particularly limited herein, as long as the swing angle is a swing angle capable of completing operation, which is a technical scope to be protected by the present application.

According to the automatic punching method provided by the embodiment of the application, a workpiece can be automatically positioned without rotating a certain angle manually in the interval blanking process, the production efficiency is improved, the labor intensity of operators is reduced, and the production danger of the operators is reduced in the operation process.

Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the claims that follow.

Claims

1. The device for automatically punching is characterized by comprising a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism;

in the process of the movement of the upper die returning to the top dead center position, the upper die drives the gear to rotate through the linkage mechanism, and further drives a material supporting positioning plate which is fixed at the upper end of the rotating shaft and used for bearing a workpiece to synchronously rotate at a fixed angle; in the process that the upper die moves towards the bottom dead center position, the upper die drives the linkage mechanism to move, and the gear keeps the original position under the action of the directional positioning mechanism;

the linkage mechanism comprises a connecting rod swing arm mechanism and a shifting tooth limiting mechanism;

the shifting tooth limiting mechanism is provided with a shifting tongue; the other end of the linkage mechanism is connected with the gear in the rotating mechanism, so that the shifting tongue is meshed with the gear on the rotating shaft sleeved in the rotating mechanism;

the positioning mechanism comprises more than one positioning hole and a bevel pin, the positioning holes are arranged on the lower end face of the gear, and the positioning holes are spaced at a preset angle; the bevel pin is matched with the positioning hole, is arranged at a fixed position opposite to the positioning hole on the gear, is positioned on the upper end surface of the lower die floating plate of the blanking die, and can slide up and down under the action of a spring in the bevel pin; the bevel pin limits the gear and enables the gear to rotate in a fixed angle and a single direction.

2. The apparatus of claim 1, wherein the upper die of the blanking die comprises: the device comprises an upper bottom plate, a male die fixing plate and a stripper plate;

3. The apparatus of claim 2, wherein the blanking die further comprises a lower die, the lower die comprising: the lower bottom plate, the female die fixing plate, the lower die floating plate and the limiting mechanism;

the upper end surface of the lower bottom plate is connected with one end of the female die fixing plate, the female die is embedded in the female die fixing plate, and the female die is arranged close to the male die; the rotating mechanism and the directional positioning mechanism are respectively arranged on the lower die floating plate, and the lower die floating plate is connected to the lower die through the limiting mechanism; when the linkage mechanism drives the rotating mechanism to rotate, the lower die floating plate is fixed through the limiting mechanism.

4. An apparatus for automatic punching according to claim 3, characterized by comprising: the limiting mechanism comprises a rubber block and a limiting rod;

5. The apparatus of claim 4, wherein the bevel pin limits the gear and enables the gear to rotate in a single direction at a fixed angle, and the bevel pin is in the shape of a bevel and includes a lower end and a higher end, and specifically includes:

when the upper die moves from the bottom dead center position to the top dead center position, the gear rotates under the action of the shifting tongue, in the rotating process of the gear, the lower end face of the gear sequentially contacts the lower end of the bevel pin and the high end of the bevel pin, and meanwhile, the bevel pin slides out of the current positioning hole and slides into the adjacent positioning hole, so that the gear rotates in a fixed-angle one-way mode.

6. An apparatus for automatic punching according to claim 4, characterized by comprising: the number of the positioning holes is the same as the number of the teeth of the gear and the number of the punching holes of the workpiece.

7. The apparatus of claim 3, wherein the linkage swing arm mechanism comprises: the device comprises an upper connecting rod, a lower connecting rod, an upper rotating shaft, a middle rotating shaft, a lower rotating shaft and a swing arm;

8. The apparatus of claim 7, wherein the engagement structure is a U-shaped groove or a square groove.

9. An apparatus for automatic punching according to claim 7, characterized by comprising: the other end of the upper connecting rod is connected with one end of the lower connecting rod through the middle rotating shaft, and the structure is specifically adopted as follows: and one end of the upper connecting rod, which is connected with the transfer shaft, is provided with a sliding chute, and the transfer shaft slides in the sliding chute and reciprocates along with the upper connecting rod so as to drive the lower connecting rod to swing.

10. The apparatus of claim 3, wherein the poke tooth limiting mechanism further comprises a poke rod and a poke plate;

one end of the shifting rod is fixed in the shifting plate, the other end of the shifting rod is arranged outside the shifting plate, and the other end of the shifting rod is arranged into a connecting structure matched with the meshing structure at one end of the swing arm;

11. An apparatus for automated punching according to claim 10, comprising: the connecting structure is of a ball head structure, and the ball head structure is matched with the U-shaped groove or the square groove of the swing arm.

12. The apparatus for automatic punching of claim 3, wherein the blanking die further comprises: a guide sleeve and a guide pillar;

13. An apparatus for automatic punching according to claim 3, characterized by comprising: a bearing or shaft sleeve; the lower die floating plate is arranged in the lower die;

14. The automatic punching device according to claim 1, wherein the supporting positioning plate is fixed to the upper end of the rotating shaft by a first positioning key; the gear is fixed on the rotating shaft through a second positioning key.

15. The apparatus for automated punching according to claim 1, comprising: and the at least two positioning pins are used for fixing a workpiece to be processed and are arranged on the material supporting positioning plate.

16. An automatic punching method for punching a workpiece by using the automatic punching apparatus according to claim 1, the apparatus comprising a blanking die, a linkage mechanism, a rotating mechanism and a directional positioning mechanism; the method is characterized by specifically comprising the following steps:

the upper die performs reciprocating motion for the second time and the third time in sequence until the workpiece is processed after the Nth blanking is completed;

17. The automatic punching method according to claim 16, wherein one cycle of punching by the upper die specifically comprises:

the connecting rod swing arm mechanism is provided with an upper connecting rod, a lower connecting rod, an upper rotating shaft, a middle rotating shaft, a lower rotating shaft and a swing arm; the shifting gear limiting mechanism is also provided with a shifting lever and a shifting plate;

in the process that the upper die moves from the top dead center position to the bottom dead center position for the first time, the upper die drives the upper connecting rod to move downwards, the upper connecting rod drives the lower connecting rod to rotate around the lower rotating shaft in the anticlockwise direction through the middle rotating shaft, and the lower rotating shaft drives the swing arm to rotate anticlockwise by a first preset angle; the swing arm pulls the shifting gear limiting mechanism to rotate clockwise around the rotating shaft; the gear keeps the original position under the matching of the groove pin and the positioning hole, and the shifting tongue slides into the adjacent second tooth groove from the first tooth groove of the gear; when the gear does not rotate, the rotating mechanism and the workpiece do not rotate, the upper die compresses the workpiece, and a first hole is punched;

then, the upper die drives the upper connecting rod to move upwards, and the upper connecting rod drives the lower connecting rod to rotate clockwise around the lower rotating shaft; the lower rotating shaft drives the swing arm to rotate clockwise by the first preset angle, the swing arm dials the gear shifting limiting mechanism to rotate anticlockwise around the rotating shaft, and the gear rotates anticlockwise by a second preset angle around the rotating shaft under the action of a shifting tongue of the gear shifting limiting mechanism; meanwhile, the bevel pin slides into the adjacent second positioning hole from the first positioning hole on the lower end face of the gear; the gear drives the rotating shaft, and the rotating shaft drives the workpiece on the material supporting positioning plate to rotate by a corresponding angle so as to position the workpiece; and the upper die reaches the top dead center position to complete a punching cycle.

18. The automated punch method of claim 16 wherein N is an integer greater than or equal to 1.