CN115041596A - Positioning structure and stamping device - Google Patents

Abstract

The invention relates to a positioning structure and a stamping device. The positioning structure is used for a stamping device and comprises a fixing piece and a propping assembly. The fixing piece is used for fixing with a stamping fixed die of the stamping device. The abutting assembly is arranged on the fixing piece and comprises a floating positioning piece and an abutting power piece, the floating positioning piece can move relative to the fixing piece and is used for abutting against a workpiece located on the punching fixed die, and the abutting power piece exerts abutting force on the workpiece through the floating positioning piece. The floating positioning piece is constructed to move relative to the fixing piece along with the position change of the workpiece and is kept against the workpiece under the action of the abutting power piece. The abutting power piece of the positioning structure drives the floating positioning piece to move relative to the fixing piece to abut against the workpiece, and abutting force is applied to the workpiece to generate a positioning effect. Meanwhile, the floating positioning piece can move relative to the positioning piece, so that the adjustment allowance can be provided for the workpiece within the moving range of the floating positioning piece on the premise of keeping the floating positioning piece against the workpiece, and the adjustment requirement is met.

Description

Positioning structure and stamping device

Technical Field

The invention relates to the technical field of stamping, in particular to a positioning structure and a stamping device.

Background

The cold stamping drawing die is the first process of forming the automobile covering part, and a plate to be stamped needs to be limited on a die pressing surface by a plurality of positioning structures in the forming process of a workpiece, so that the forming precision of the workpiece is ensured.

The existing cold stamping and drawing die has more types and functions of positioning structures, but belongs to plate type positioning after being restored, and the positioning structures are fixed in positioning installation grooves on a material pressing surface by screws. In the production debugging process, the displacement of the plate is required to be larger than the positioning adjustment amount for various reasons, and at the moment, the plate-type positioning is limited by the positions of the fixing screw holes or the positioning mounting grooves, so that the condition that the plate cannot be positioned due to insufficient adjustment allowance occurs.

Disclosure of Invention

In view of the above, it is desirable to provide a positioning structure and a press device having a sufficient adjustment margin.

A positioning structure for a punching device, the positioning structure comprising:

the fixed part is used for being fixed with a stamping fixed die of the stamping device; and

the abutting assembly is arranged on the fixing piece and comprises a floating positioning piece and an abutting power piece, the floating positioning piece can move relative to the fixing piece and is used for abutting against a workpiece positioned on the punching fixed die, and the abutting power piece applies abutting force to the workpiece through the floating positioning piece;

the floating positioning piece is constructed to move relative to the fixing piece along with the position change of the workpiece and is kept against the workpiece under the action of the abutting power piece.

The abutting power piece of the positioning structure generates abutting force and drives the floating positioning piece to move relative to the fixing piece fixed on the punching fixed die to abut against the workpiece positioned on the punching fixed die, and then the abutting force is applied to the workpiece to generate a positioning effect. Meanwhile, the floating positioning piece can move relative to the positioning piece, so that the floating positioning piece can provide adjustment allowance for the workpiece in the moving range of the floating positioning piece on the premise that the floating positioning piece is kept to abut against the workpiece under the action of the abutting power piece, and the adjustment requirement is met.

In one embodiment, the abutting power member includes a body and an ejector pin disposed at one end of the body, the ejector pin abuts against one side of the floating positioning member facing away from the workpiece, the ejector pin is configured to be capable of extending and contracting along with the movement of the floating positioning member, and the abutting force is applied to the floating positioning member during the extending and contracting process, so that the floating positioning member and the workpiece are kept abutting.

In one embodiment, a containing cavity is configured in the body;

the ejector pin further comprises an elastic piece and a pin body, the elastic piece is arranged in the accommodating cavity and is arranged between the inner wall of the accommodating cavity and the pin body, the deformation direction of the elastic piece is consistent with the stretching direction of the ejector pin, and the pin body is in contact with the floating positioning piece.

In one embodiment, the body is operable to move axially relative to the fixed member, and the direction of extension and retraction of the knock pin is parallel to the axial direction of the body.

In one embodiment, the abutting assembly further comprises a stroke adjusting piece, the stroke adjusting piece is arranged on the fixing piece and is configured with an internal thread, at least part of the outer surface of the body is configured with an external thread and is in threaded fit with the stroke adjusting piece, and when the body is operable to rotate around the self axial direction, the stroke adjusting piece moves relative to the fixing piece along the self axial direction.

In one embodiment, the knock pin is detachably connected to the body.

In one embodiment, the floating positioning element is rotatably connected with the fixed element, and the workpiece and the abutting power element control the floating positioning element to rotate reversely relative to the fixed element.

In one embodiment, the floating positioning piece comprises a positioning plate and a guide plate which are connected, the positioning plate is used for abutting against the workpiece, and the guide plate is rotatably connected with the fixing piece;

the guide plate is connected with the positioning plate in a bending mode, the surface of the guide plate, which faces away from the fixing piece, is a guide surface, and the guide surface is used for guiding the thrown workpiece to the positioning plate to abut against.

In one embodiment, the fixing member comprises a positioning substrate and a supporting plate, and the supporting plate is arranged on the positioning substrate and blocked on a moving path of the floating positioning member;

the abutting power piece penetrates through the supporting plate.

The stamping device is characterized by comprising a stamping fixed die, a stamping movable die and the positioning structure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a positioning structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of another angular configuration of the positioning structure shown in FIG. 1;

fig. 3 is a schematic view of the positioning structure shown in fig. 1 and a punching device.

Description of reference numerals:

100. a positioning structure; 10. a fixing member; 11. positioning the substrate; 13. a support plate; 15. a reinforcing plate; 30. a holding assembly; 31. a floating positioning member; 311. positioning a plate; 313. a guide plate; 33. the power piece is propped; 331. a body; 333. a knock pin; 3331. a pin body; 35. a stroke adjustment member; 50. a rotating member; 200. a stamping device; 201. stamping a fixed die; 203. stamping a movable die; s, a guide surface; B. avoiding the gap.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, in some embodiments, a positioning structure 100 for a punching device 200 includes a fixing member 10 and a holding member 30. The fixing member 10 is used for fixing with a punching fixed die 201 of the punching device 200. The abutting assembly 30 is disposed on the fixing member 10, and includes a floating positioning member 31 and an abutting power member 33, the floating positioning member 31 can move relative to the fixing member 10 and is used for abutting against a workpiece (not shown) located on the punching fixing mold 201, and the abutting power member 33 applies an abutting force to the workpiece through the floating positioning member 31. Wherein, the floating positioning piece 31 is configured to move relative to the fixed piece 10 following the position change of the workpiece and to be kept against the workpiece under the action of the abutting power piece 33.

The punching device 200 generally comprises a fixed punching fixed die 201 and a movable punching die 203 which presses down a workpiece to be machined and formed. The abutting power piece 33 is used for generating abutting force on the workpiece and is applied to the workpiece through the floating positioning piece 31. The floating positioning member 31 can move relative to the fixing member 10, and thus can approach and abut against the workpiece under the action of the abutting power member 33. In the production debugging process, when the workpiece needs to move, the floating positioning piece 31 can move along with the workpiece by overcoming the abutting force. The movement of the floating positioning element 31 relative to the fixed element 10 may be a shifting sliding movement, a rotating movement, etc., and only needs to be realized to be able to displace relative to the fixed element 10 and obtain an adjustment margin within the movement range, and the power source of the abutting power element 33 may be an elastic force, a magnetic force, etc., such as a torsion spring, etc., and only needs to be able to generate an abutting force for driving the floating positioning element 31 to generate a workpiece and allow the floating positioning element 31 to reciprocate, which is not limited specifically herein.

The abutting power member 33 of the positioning structure 100 generates an abutting force, and drives the floating positioning member 31 to move relative to the fixed member 10 fixed on the fixed punching mold 201 to abut against the workpiece located on the fixed punching mold 201, so that the abutting force is applied to the workpiece to generate a positioning effect. Meanwhile, the floating positioning piece 31 can move relative to the fixing piece 10, so that under the premise that the floating positioning piece is kept to abut against the workpiece under the action of the abutting power piece 33, the floating positioning piece can provide adjustment allowance for the workpiece in the moving range, and the adjustment requirement is met. Traditional board-like positioner, if want to obtain adjustment clout need expand the hole that is used for dodging positioner on the groove that is used for installing positioner on the punching press cover half 201 and the punching press movable mould 203, and this location structure 100 then need not so, can obtain abundant adjustment clout through unsteady setting element 31, has saved a large amount of costs of expanding processing and aftertreatment, has also avoided destroying the original structure of mould from this. Even if the die is changed without changing the main body of the press apparatus 200, the positioning effect can be adapted and continued by adjusting the margin.

Further, the fixing member 10 includes a positioning base plate 11 and a supporting plate 13, and the supporting plate 13 is disposed on the positioning base plate 11 and is blocked on the moving path of the floating positioning member 31. The abutting power piece 33 penetrates through the supporting plate 13.

The positioning base plate 11 is used for fixing with the fixed stamping die 201, the supporting plate 13 is located on the moving path of the floating positioning piece 31, and when the floating positioning piece 31 moves to the supporting plate 13, the floating positioning piece 31 is blocked by the supporting plate 13 in a single direction. The abutting power piece 33 is inserted through the supporting plate 13 and has one end abutting against the side of the floating positioning piece 31 opposite to the workpiece.

On one hand, the supporting plate 13 has a basic positioning function on the floating positioning piece 31, and when the floating positioning piece 31 is movably arranged on the supporting plate 13 to abut against, the supporting plate can be stably supported. On the other hand, the supporting member provides a fixed mounting position for the abutting power member 33, and the abutting power member 33 can be abutted on the floating positioning member 31 through the supporting plate 13. It is understood that the sustaining power member 33 can be connected with the fixing member 10 by other means, such as directly fixed on the positioning substrate 11, etc., and is not limited in detail herein.

Furthermore, the fixing member 10 further includes a reinforcing plate 15, and the reinforcing plate 15 is disposed between the positioning substrate 11 and the supporting plate 13, and two of the three are perpendicular to each other. The reinforcing plate 15 reinforces the structural strength of the fixing member 10, so that the fixing member has strong impact resistance and meets the strength requirement of stamping and positioning.

In some embodiments, the abutting power member 33 includes a body 331 and a top pin 333 disposed at one end of the body 331, the top pin 333 abuts against a side of the floating positioning member 31 facing away from the workpiece, and the top pin 333 is configured to be capable of extending and contracting along with the movement of the floating positioning member 31, and apply an abutting force to the floating positioning member 31 and keep the floating positioning member 31 abutting against the workpiece during the extending and contracting process.

The abutting power member 33 acts on the floating positioning member 31 through the top pin 333, and allows the floating positioning member 31 to move within a certain range through the extension and contraction of the top pin 333 while transmitting the abutting force through the floating positioning member 31, so as to leave an adjustment margin while keeping the abutting against the workpiece.

It is understood that, in some embodiments, the abutting power member 33 may directly abut against the workpiece without the floating positioning member 31 and generate an abutting force thereon. The abutting power member 33 may also be a torsion spring, and two torsion arms of the torsion spring abut against the fixed member 10 and the floating positioning member 31 respectively, and the floating positioning member 31 is driven to generate an abutting force on the workpiece.

Further, a receiving cavity (not shown) is formed in the body 331. The top pin 333 further includes an elastic member (not shown) and a pin body 3331, the elastic member is disposed in the accommodating cavity and between the inner wall of the accommodating cavity and the pin body 3331, the deformation direction of the elastic member is consistent with the extension direction of the top pin 333, and the pin body 3331 contacts with the floating positioning member 31.

The elastic member pushes the pin body 3331 against the workpiece through its own elastic force, and generates a holding force on the workpiece, and at the same time, since it has a stretchable property, the pin body 3331 can move back and forth along the axial direction of the body 331 when it stretches, and the stretching of the knock pin 333 is realized as a whole. The pin body 3331 is at least partially receivable in the receiving cavity when the knock pin 333 is retracted.

It should be understood that, in addition to using an elastic member such as a spring, the top pin 333 may also use a mode of providing a repulsive magnet in the receiving cavity and the pin body 3331, respectively, as long as it can be used as a power source of the holding force and allows the pin body 3331 to move axially along the body 331.

In some embodiments, the body 331 is operable to move axially relative to the fixing member 10, and the extending and retracting directions of the knock pin 333 are parallel to the axial direction of the body 331.

The body 331 is controllably movable in a direction parallel to the extension and contraction direction of the knock pin 333. Therefore, in the moving process of the body 331, the knock pin 333 provided in the body 331 also moves along with the moving process, and the range of expansion and contraction of the knock pin 333 is changed with respect to the fixing member 10, thereby realizing adjustment of the adjustment margin range.

Further, the holding unit 30 further includes a stroke adjustment member 35, the stroke adjustment member 35 is disposed on the fixing member 10 and configured with an internal thread, at least a portion of the outer surface of the body 331 is configured with an external thread and is threadedly engaged with the stroke adjustment member 35, and when the body 331 is operatively rotated about its own axis, the body is moved relative to the fixing member 10 along its own axis by the stroke adjustment member 35.

The stroke adjusting member 35 is specifically disposed on one side of the supporting plate 13, and the abutting power member 33 penetrates through the stroke adjusting member 35 and the supporting plate 13. The body 331 is screw-engaged with the stroke adjusting member 35, and the body 331 is rotated to move axially relative to the fixing member 10, the moving range of the body 331 depends on the external thread structure area and length, and the moving range of the pin 3331 at one end of the body 331 is naturally changed along with the movement of the body 331, so that the floating range of the floating positioning member 31 is changed.

Specifically, the top pin 333 is disposed on a side of the support plate 13 facing away from the workpiece, and the pin body 3331 can be completely received in the receiving cavity. One end of the knock pin 333 near the pin body 3331 is adjusted to be hidden from the surface of the support member facing the workpiece by the stroke adjuster 35. Thus, the floating positioning member 31 can make the pin 3331 shrink and completely hide on the surface of the supporting member, and at this time, the floating positioning member 31 moves to be attached to the supporting member.

It is understood that in other embodiments, the body 331 and the stroke adjusting member 35 can be engaged by other means, such as a snap fit, and a plurality of snap fit protrusions or grooves are provided, and the movement and position adjustment of the body 331 can be realized by replacing different protrusions or grooves.

In some embodiments, the knock pin 333 is detachably connected to the body 331.

The top pin 333 is a plurality of pins with different specifications, and can be detached and selected to be matched with the body 331. The specifications of the knock pin 333 include, but are not limited to, different lengths, different diameters, and the like. In other words, only the pin 3331 may be replaced, or both the pin 3331 and the elastic member may be replaced. When the elastic member is replaced together with the pin body 3331, the elastic member having different elastic force can be replaced. In this way, the range of the allowance of the holding effect and the adjustment allowance can be changed by replacing the knock pin 333 of different specifications.

In one embodiment, the working length of the pin body 3331 is 15mm, in other words, the retractable length of the pin body 3331 is 15mm, and the movable range of the main body 331 along the axial direction thereof, which can be adjusted by the stroke adjusting member 35, is 0mm to 15mm, so that the maximum adjustable stroke of the abutting power member 33 is 30 mm. It will be appreciated that this maximum travel can be varied by adjusting the size, and thus the removal of the top pin 333.

In some embodiments, the floating positioning member 31 is rotatably connected to the fixed member 10, and the workpiece and the holding power member 33 control the floating positioning member 31 to rotate in the opposite direction relative to the fixed member 10.

The workpiece can push the floating positioning piece 31 to rotate towards the direction close to the fixing piece 10, and the abutting power piece 33 can push the floating positioning piece 31 to rotate towards the direction far away from the fixing piece 10. Therefore, the floating positioning member 31 is acted by the workpiece and the abutting power member 33 on both sides, i.e. the floating positioning member 31 is located between the two, the abutting power member 33 acts on the workpiece by the floating positioning member 31, and the rotation range of the floating positioning member 31 is the adjustment allowance range.

Under the pushing of the abutting power piece 33, the floating positioning piece 31 can always abut against the workpiece, and when the acting force of the workpiece is greater than the abutting force, the workpiece can push the floating positioning piece 31 to obtain adjustment. Meanwhile, the abutting power piece 33 abuts against one side of the floating positioning piece 31, which is back to the workpiece, and the rotating mode can enlarge the moving range of the abutting power piece 33 and increase the adjustment allowance. When the movable punching die 203 is clamped and pressed down, the positioning plate 311 is driven to rotate by the pressure of the movable punching die 203 to gradually retract relative to the fixed member 10 to avoid the movable punching die 311 until the movable punching die 203 presses the workpiece to realize punching.

Further, the floating positioning member 31 includes a positioning plate 311 and a guide plate 313 connected, the positioning plate 311 being for abutting against the workpiece, and the guide plate 313 being rotatably connected with the fixed member 10. The guide plate 313 is connected to the positioning plate 311 in a bent manner, and a surface of the guide plate facing away from the fixing element 10 is a guide surface S for guiding the inserted workpiece against the positioning plate 311.

When blanking is performed on the fixed punching die 201, a workpiece to be machined and formed is guided by the guide surface S and gradually falls into the area of the positioning plate 311 so as to be positioned and abutted by the positioning plate 311. The guide plate 313 is connected with the positioning plate 311 in a bending way, when the positioning plate 311 is in a completely vertical state, the guide plate 313 still has a certain inclination angle, the guiding effect is kept, and the guide plate 313 bent relative to the positioning plate 311 is also more favorable for forming a rotating connection relationship with the fixing piece 10.

Further, the positioning structure 100 further includes a rotation member 50. The floating positioning member 31 is rotatably connected to the fixed member 10 through the rotating member 50, and specifically, the rotating member 50 includes a fixed portion fixed to both the support plate 13 and the reinforcing plate 15 and a rotating portion rotatable with respect to the fixed portion, and the rotating portion is connected to the guide plate 313.

It will be appreciated that the floating positioning member 31 may also be rotated in other ways, such as a pivot connection or the like. In addition, the movement of the floating positioning element 31 is not limited to rotation, but may also be translation, and only the positional relationship between the floating positioning element and the fixing element 10 can be adjusted in the moving process to realize floating positioning, and the connection mode also only needs to be correspondingly adaptively modified into sliding connection and the like, and is not particularly limited herein.

When the positioning structure 100 is used, a workpiece to be machined and formed is guided to the positioning plate 311 through the material guiding surface S, and the workpiece is abutted and fixed by the positioning plate 311 under the action of the abutting power member 33. The propping power piece 33 can be adapted to different positioning requirements by extending and contracting the top pin 333. When the die is closed, when the punching movable die 203 is pressed down, the floating positioning piece 31 can receive the downward pressure to gradually rotate, and the positioning effect is completed in the whole process. Further, the adjustment margin range may be changed by replacing the knock pin 333 or rotating the knock pin 333.

The invention also provides a stamping device 200, wherein the stamping device 200 comprises a fixed stamping die 201, a movable stamping die 203 and the positioning structure 100.

The fixed stamping die 201 is provided with a mounting groove, the positioning structure 100 is arranged in the mounting groove, and the movable stamping die 203 is provided with an avoiding notch B for avoiding the positioning structure 100 during stamping. When the punching movable die 203 is pressed down, the floating positioning piece can gradually rotate until the floating positioning piece is completely accommodated in the avoiding gap B.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. A positioning structure for a punching apparatus, characterized in that the positioning structure comprises:

the fixed part is used for being fixed with a stamping fixed die of the stamping device; and

the abutting assembly is arranged on the fixing piece and comprises a floating positioning piece and an abutting power piece, the floating positioning piece can move relative to the fixing piece and is used for abutting against a workpiece positioned on the punching fixed die, and the abutting power piece applies abutting force to the workpiece through the floating positioning piece;

the floating positioning piece is constructed to move relative to the fixing piece along with the position change of the workpiece and is kept against the workpiece under the action of the abutting power piece.

2. The positioning structure according to claim 1, wherein the abutting power member comprises a body and a top pin disposed at one end of the body, the top pin abuts against a side of the floating positioning member facing away from the workpiece, the top pin is configured to be capable of extending and contracting along with the movement of the floating positioning member, and the abutting force is applied to the floating positioning member during the extending and contracting process, so that the floating positioning member abuts against the workpiece.

3. The positioning structure of claim 2, wherein a receiving cavity is configured in the body;

the ejector pin further comprises an elastic piece and a pin body, the elastic piece is arranged in the accommodating cavity and is arranged between the inner wall of the accommodating cavity and the pin body, the deformation direction of the elastic piece is consistent with the stretching direction of the ejector pin, and the pin body is in contact with the floating positioning piece.

4. A positioning structure according to claim 3, wherein said body is operable to move axially relative to said fixed member, and the direction of extension and retraction of said knock pin is parallel to the axial direction of said body.

5. The positioning structure of claim 4, wherein the abutting assembly further comprises a stroke adjustment member, the stroke adjustment member is disposed on the fixing member and is configured with an internal thread, at least a portion of the outer surface of the body is configured with an external thread and is in threaded engagement with the stroke adjustment member, and when the body is operatively rotated about its own axis, the stroke adjustment member is moved relative to the fixing member along its own axis.

6. The positioning structure of claim 2, wherein the knock pin is detachably connected to the body.

7. The positioning structure of claim 2, wherein the floating positioning member is rotatably connected to the fixed member, and the workpiece and the holding power member control the floating positioning member to rotate in a reverse direction with respect to the fixed member.

8. The positioning structure according to claim 2, wherein the floating positioning member comprises a positioning plate and a guide plate connected, the positioning plate is used for abutting against the workpiece, and the guide plate is rotatably connected with the fixing member;

the guide plate is connected with the positioning plate in a bending mode, the surface of the guide plate, which faces away from the fixing piece, is a guide surface, and the guide surface is used for guiding the fed workpiece to the positioning plate to abut against the positioning plate.

9. The positioning structure of claim 1, wherein the fixing member comprises a positioning base plate and a supporting plate, the supporting plate is disposed on the positioning base plate and is blocked on a moving path of the floating positioning member;

the abutting power piece penetrates through the supporting plate.

10. A punching apparatus, characterized in that the punching apparatus comprises a punching fixed die, a punching movable die and a positioning structure according to any one of claims 1 to 9.

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