CN117772901A - Trimming and positioning device and method for stamping die - Google Patents

Abstract

The invention discloses a trimming and positioning device and a trimming and positioning method for a stamping die, wherein the trimming and positioning device comprises an upper die plate, a lower die plate and a punching cutter arranged on the upper die plate, wherein a punching platform for placing a workpiece is reserved on the lower die plate; the trimming positioning device comprises a plurality of positioning pieces arranged on the lower die plate, and the lower die plate is provided with a movable thimble which can drive the positioning pieces to rotate forward and enable the end parts of the positioning pieces to abut against the edge of the cut on the workpiece; the upper template is provided with a fixed thimble which can be abutted against the positioning piece and drive the positioning piece to reversely rotate. The invention aims to provide a trimming and positioning device and method for a stamping die, which can reduce the influence of the appearance of a workpiece on positioning, directly position a cut edge under the condition that the non-cut edge of the workpiece cannot be positioned, and can effectively ensure the positioning precision of the workpiece without cutting the workpiece, thereby improving the stamping quality, and the material utilization rate and efficiency.

Description

Trimming and positioning device and method for stamping die

Technical Field

The invention relates to the technical field of material processing and manufacturing, in particular to a trimming and positioning device and a trimming and positioning method for a stamping die.

Background

Stamping is a common metal working process in which a metal sheet is press formed using a die. During the stamping process, the sheet metal is pressed into a die to form the desired shape. After the stamping workpiece is formed, the edge of the stamping workpiece may have problems such as burrs, tearing, deformation and the like, and trimming treatment is needed. The purpose of the trimming is to trim the edges of the workpiece so that the edges of the workpiece are smoother and tidier and meet the size and precision requirements of the workpiece, and in the process, the positioning precision of the trimming workpiece determines whether the final size of the workpiece meets the production requirements.

The main positioning modes and defects of the trimming of the stamping workpiece commonly adopted in the prior art are as follows: 1. the workpiece is positioned by a notch of a non-trimming appearance, but the appearance line cannot be used when no characteristic exists; 2. positioning an inner hole of a workpiece, wherein the inner hole cannot be used when the workpiece is free of the inner hole; 3. one side of the workpiece is cut to serve as a positioning reference side, and the other side is cut, so that the production efficiency is low and the positioning accuracy is low; 4. the slotting tool or the air cylinder is adopted for positioning, so that the occupied space is large and the cost is relatively high; 5. cutting off the scrap edge location, the scrap width is relatively great, and material utilization is low.

Disclosure of Invention

The invention aims to provide a trimming and positioning device and method for a stamping die, which can reduce the influence of the appearance of a workpiece on positioning, directly position a cut edge under the condition that the non-cut edge of the workpiece cannot be positioned, and can effectively ensure the positioning precision of the workpiece without cutting the workpiece, thereby improving the stamping quality, and the material utilization rate and efficiency.

In order to achieve the above purpose, the invention adopts the following technical scheme: the trimming and positioning device of the stamping die comprises an upper die plate, a lower die plate and a punching cutter arranged on the upper die plate, wherein a punching platform for placing a workpiece is reserved on the lower die plate;

the trimming and positioning device comprises a plurality of positioning pieces arranged on the lower die plate, and the lower die plate is provided with movable ejector pins which can drive the positioning pieces to rotate forward and enable the end parts of the positioning pieces to abut against the edges of the cut edges on the workpiece;

the upper template is provided with a fixed thimble which can be abutted against the locating piece and drive the locating piece to reversely rotate.

In a preferred embodiment of the present invention, a top post capable of elastically abutting against the surface of the workpiece is provided on the upper die plate, and when the upper die plate and the lower die plate are assembled, the time point of contact between the top post and the workpiece is earlier than the time point of contact between the fixed thimble and the positioning member;

and the jacking column is perpendicular to the punching platform and the workpiece.

In a preferred embodiment of the invention, each positioning piece comprises a swing rod base capable of being detachably connected with the lower die plate and a positioning swing rod hinged to the swing rod base, a positioning block capable of being abutted against a cut edge on the workpiece is arranged on the positioning swing rod, and the movable thimble and the fixed thimble can be abutted against the positioning swing rod.

In a preferred embodiment of the present invention, the swing rod base is provided with a limit post capable of limiting the rotation of the positioning swing rod.

In a preferred embodiment of the invention, the axes of the fixed thimble and the movable thimble are consistent with the die closing direction of the upper die plate and the lower die plate, the fixed thimble and the movable thimble are arranged in a staggered manner, and the vertical distance between the central axis of the fixed thimble and the rotating shaft of the positioning swing rod is greater than the vertical distance between the central axis of the movable thimble and the rotating shaft of the positioning swing rod.

In a preferred embodiment of the present invention, one ends of the movable thimble and the fixed thimble, which are abutted against the positioning swing rod, are hemispherical.

In a preferred embodiment of the invention, a chamfer is arranged on one side of the positioning block, which is abutted against the edge of the cut on the workpiece.

In a preferred embodiment of the present invention, the movable thimble and the ejector column may be powered by springs, respectively.

A trimming and positioning method of a stamping die comprises the following steps of;

step one, separating the upper die plate from the lower die plate, wherein the positioning pieces are elastically supported by the movable ejector pins, and a plurality of positioning blocks are arranged on the punching platform in a surrounding manner to form a limiting area for limiting the movement of the workpiece;

step two, taking out the workpiece subjected to punching from a limiting area, and placing the workpiece which is not subjected to punching in the limiting area on the punching platform, so that the edge of the cut on the workpiece can be abutted against the positioning block;

step three, the upper die plate and the lower die plate are assembled, the ejector column is elastically abutted against the workpiece, then the fixed ejector pin is abutted against the positioning swing rod, the positioning swing rod is driven to reversely rotate, and finally the cut edge on the workpiece is punched by the punching cutter;

and fourth, repeating the first, second and third steps.

The beneficial effects of the invention are as follows:

(1) The movable thimble drives the positioning piece to act when the upper die plate and the lower die plate are separated, the position of the workpiece is limited and positioned from the cut edge of the workpiece, and meanwhile, the positioning piece is pressed down in the process of fixing the thimble to enable the positioning piece to reversely rotate, so that the cut edge of the workpiece is prevented from being influenced when the punching knife punches the cut edge of the workpiece;

(2) When the upper die plate and the lower die plate are assembled, the ejector column is pressed on the workpiece first and used for fixing the position of the workpiece, then the ejector pin is fixed to drive the positioning swing rod and the positioning block to be far away from the punching platform, and the limiting locking of the positioning block on the workpiece is released, so that the workpiece is kept unchanged in the whole punching process, and the punching precision of the workpiece is increased.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is a schematic cross-sectional view of an upper die plate and a lower die plate in a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the partial enlarged structure at B of FIG. 1 in a preferred embodiment of the invention;

FIG. 3 is a schematic cross-sectional view of the upper and lower platens during clamping in accordance with a preferred embodiment of the present invention;

wherein, 1, upper template; 2. a lower template; 3. punching a cutter; 4. punching a platform; 5. a positioning piece; 501. a swing rod base; 502. positioning a swinging rod; 503. a positioning block; 6. a movable thimble; 7. fixing the ejector pin; 8. a top column; 9. a limit column; 10. a spring; 11. a workpiece.

Detailed Description

The invention will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the invention, which are presented only by way of illustration, and thus show only the structures that are relevant to the invention.

In this embodiment, if a directional instruction (such as up, down, bottom, top, etc.) is provided, the directional instruction is merely used to explain the relative positional relationship between the components, the movement condition, etc. in a certain specific posture, and if the specific posture is changed, the directional instruction is changed accordingly. The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1-3, a trimming positioning device for a stamping die comprises an upper die plate 1, a lower die plate 2 and a punching cutter 3 arranged on the upper die plate 1, and is characterized in that: a punching platform 4 for placing a workpiece 11 is reserved on the lower template 2;

the trimming positioning device comprises a plurality of positioning pieces 5 arranged on the lower die plate 2, and the lower die plate 2 is provided with a movable thimble 6 which can drive the positioning pieces 5 to rotate forward and enable the end parts of the positioning pieces 5 to abut against the edge of a cut on a workpiece 11;

the upper template 1 is provided with a fixed thimble 7 which can be abutted against the positioning piece 5 and drive the positioning piece 5 to reversely rotate.

Specifically, the forward direction and the direction rotation of the positioning element 5 do not represent a certain designated direction, when the movable thimble 6 drives the end of the positioning element 5 to approach the punching platform 4 gradually until the end can abut against the edge of the cut on the workpiece 11, the direction of rotation of the positioning element 5 is referred to as the forward direction no matter clockwise or anticlockwise. Similarly, when the fixed ejector pin 7 drives the end of the positioning member 5 to gradually separate from the punching platform 4, the rotation direction of the positioning member 5 is referred to as reverse direction no matter clockwise or counterclockwise. In the above embodiment, the cut edge on the workpiece 11 refers to the edge of the workpiece 11 that needs to be die-cut.

In the above technical solution, the movable thimble 6 drives the positioning member 5 to act when the upper die plate 1 and the lower die plate 2 are separated, so as to limit and position the workpiece 11. Simultaneously, the fixed thimble 7 presses down the locating piece 5 in the process of die assembly, so that the locating piece 5 reversely rotates, the cut edge on the workpiece 11 is punched by the punching cutter 3 conveniently, the position of the workpiece 11 cannot be influenced by the rotation of the locating piece 5, the whole device occupies small space, the cost is low, and even if the workpiece 11 without any characteristic and the workpiece without an inner hole are aligned to some appearance straight lines, the movable thimble 6, the fixed thimble 7 and the locating piece 5 are only required to be arranged at proper positions on the upper die plate 1 and the lower die plate 2.

Further, in order to prevent the workpiece 11 from being displaced during the mold closing process, as shown in fig. 1 and 3, the upper die plate 1 is provided with a jack post 8 capable of elastically abutting against the surface of the workpiece 11, and when the upper die plate 1 and the lower die plate 2 are closed, the time point of contact between the jack post 8 and the workpiece 11 is earlier than the time point of contact between the fixed ejector pin 7 and the positioning member 5;

and the jack-prop 8 is perpendicular to the punching platform 4 and the workpiece 11, so that the deformation of the jack-prop 8 can be prevented while the position of the workpiece 11 is effectively fixed.

Further, as shown in fig. 2, each positioning piece 5 includes a swing rod base 501 detachably connected with the lower die plate 2 and a positioning swing rod 502 hinged on the swing rod base 501, a positioning block 503 capable of abutting against a sheared edge on the workpiece 11 is arranged on the positioning swing rod 502, and the movable thimble 6 and the fixed thimble 7 can abut against the positioning swing rod 502. The locating piece 5 can be connected to the lower die plate 2 through bolts, and is convenient to detach and replace. Meanwhile, in the technical scheme, the positioning block 503 can also be connected with the positioning swing rod 502 by adopting bolts so as to facilitate different adjustment aiming at the workpieces 11 with different specifications and increase the positioning precision of the workpieces 11. And the positioning swing rod 502 does not affect the position of the workpiece 11 when rotating forwards and reversely in the technical scheme. Specifically, when the positioning block 503 abuts against the workpiece 11, the horizontal plane of the positioning block 503 is lower than the horizontal plane of the rotating shaft of the positioning oscillating bar 502, and as shown in fig. 2, when the positioning oscillating bar 502 is driven to rotate reversely by the fixed thimble 7, the actual rotating direction of the positioning oscillating bar 502 is clockwise, so that the position of the workpiece 11 is not affected.

Further, as shown in fig. 2, a limiting post 9 capable of limiting the rotation of the positioning swing rod 502 is provided on the swing rod base 501. When the movable thimble 6 drives the positioning swing rod 502 on the positioning piece 5 to rotate, the rotation position of the positioning swing rod 502 is limited by the limiting column 9, and when the positioning swing rod 502 abuts against the limiting column 9 under the driving of the movable thimble 6, the positioning block 503 on the positioning piece 5 is at the optimal position for limiting the workpiece 11, so that the uniqueness of the positioning block 503 in positioning the workpiece 11 is ensured, and the punching precision of the workpiece 11 is increased. In the technical scheme, the uniqueness of the positioning piece 5 in positioning the workpiece 11 is ensured, and the positioning can be implemented by limiting the maximum movable range of the movable thimble 6.

Further, as shown in fig. 2, the axes of the fixed thimble 7 and the movable thimble 6 are consistent with the die closing direction of the upper die plate 1 and the lower die plate 2, the fixed thimble 7 and the movable thimble 6 are arranged in a staggered manner, and the vertical distance between the central axis of the fixed thimble 7 and the rotating shaft of the positioning swing rod 502 is greater than the vertical distance between the central axis of the movable thimble 6 and the rotating shaft of the positioning swing rod 502. When the fixed thimble 7 and the movable thimble 6 are contacted with the positioning swing rod 502 at the same time, the rotating shaft of the positioning swing rod 502 is taken as a fulcrum, and the rod body of the positioning swing rod 502 is taken as a lever with a supporting wall, at the moment, the fixed thimble 7 can drive the positioning swing rod 502 to reversely rotate only by being smaller than the force of the movable thimble 6 on the positioning swing rod 502, so that the energy loss is reduced.

In the above technical scheme, as shown in fig. 2, one ends of the movable thimble 6 and the fixed thimble 7, which are abutted against the positioning swing rod 502, are hemispherical, so that the contact area of the movable thimble 6, the fixed thimble 7 and the positioning swing rod 502 is reduced, the abrasion is further reduced, and the service lives of the movable thimble 6, the fixed thimble 7 and the positioning swing rod 502 are prolonged.

Further, in order to facilitate the placement of the workpiece 11 on the punching platform 4 and between the positioning blocks 503, a chamfer is provided on the side of the positioning block 503 abutting against the edge of the workpiece 11 to be cut, so as to guide the workpiece 11 to accurately fall on the punching platform 4.

In this embodiment, the movable thimble 6 and the ejector post 8 can respectively provide power through the spring 10, and the spring 10 can adopt the spring 10 with higher service life and stronger stability such as a nitrogen spring, so as to increase the service life of the whole device and the positioning accuracy of the workpiece 11.

Example two

1-3, on the basis of the first embodiment, a trimming and positioning method for a stamping die is realized by adopting a trimming and positioning device for the stamping die, and comprises the following steps of;

the first step is that the upper die plate 1 and the lower die plate 2 are separated, the positioning piece 5 is elastically supported by the movable thimble 6, a limiting area for limiting the movement of the workpiece 11 is formed by surrounding a plurality of positioning blocks 503 on the punching platform 4, and the precision of positioning the workpiece 11 each time can be ensured through the uniqueness of the limiting area;

step two, taking out the workpiece 11 subjected to punching from the limiting area, and placing the workpiece 11 which is not subjected to punching in the limiting area on the punching platform 4, so that the edge of a cut on the workpiece 11 can be abutted against the positioning block 503;

and thirdly, the upper die plate 1 and the lower die plate 2 are clamped, and the jacking columns 8 elastically abut against the workpiece 11 to prevent the workpiece 11 from sliding. Then the thimble 7 is fixed to prop against the positioning swing rod 502, and the positioning swing rod 502 is driven to reversely rotate, so that the influence of the positioning block 503 on the punching action of the punching cutter 3 is avoided. Finally, punching the edge of the cut on the workpiece 11 through the punching cutter 3;

and fourth, repeating the first, second and third steps.

Working principle: when the upper die plate 1 and the lower die plate 2 are separated, the movable thimble 6 drives the positioning swing rod 502 to act, so that the positioning block 503 moves to a position on the punching platform 4 for limiting and positioning the workpiece 11, and a limiting area for limiting the movement of the workpiece 11 is formed on the positioning block and the punching platform 4. The punched workpiece 11 is then taken out of the limit area, and the workpiece 11 which is not punched is placed in the limit area on the punching stage 4, so that the edge to be cut on the workpiece 11 can abut against the positioning block 503. Finally, the upper die plate 1 and the lower die plate 2 are assembled, the jacking column 8 is firstly pressed on the workpiece 11 to fix the position of the workpiece 11, then the fixing thimble 7 drives the positioning swing rod 502 and the positioning block 503 to be far away from the punching platform 4, and the limiting locking of the positioning block 503 on the workpiece 11 is released. Then, the punching cutter 3 punches the edge to be cut on the workpiece 11, and can directly position the edge to be cut under the condition that the edge to be cut of the workpiece 11 cannot be positioned, so that the positioning accuracy of the workpiece 11 is effectively ensured, the punching quality is improved, and the material utilization rate and the efficiency are improved.

The above-described preferred embodiments according to the present invention are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims (9)

1. The utility model provides a stamping die side cut positioner, is including upper template (1), lower bolster (2) and the setting of constituteing stamping die are in die-cut sword (3) on upper template (1), its characterized in that: a punching platform (4) for placing a workpiece (11) is reserved on the lower template (2);

the trimming and positioning device comprises a plurality of positioning pieces (5) arranged on the lower die plate (2), and the lower die plate (2) is provided with a movable thimble (6) which can drive the positioning pieces (5) to rotate forward and enable the end parts of the positioning pieces (5) to abut against the edge of the cut on the workpiece (11);

the upper die plate (1) is provided with a fixed thimble (7) which can be abutted against the locating piece (5) and drive the locating piece (5) to reversely rotate.

2. The stamping die trimming and positioning device according to claim 1, wherein: a jacking column (8) capable of elastically abutting against the surface of the workpiece (11) is arranged on the upper die plate (1), and when the upper die plate (1) and the lower die plate (2) are clamped, the contact time point of the jacking column (8) and the workpiece (11) is earlier than the contact time point of the fixed ejector pin (7) and the positioning piece (5);

and the jacking column (8) is perpendicular to the punching platform (4) and the workpiece (11).

3. The stamping die trimming and positioning device according to claim 2, wherein: each positioning piece (5) comprises a swing rod base (501) which can be detachably connected with the lower die plate (2) and a positioning swing rod (502) hinged to the swing rod base (501), a positioning block (503) which can be abutted to a cut edge on the workpiece (11) is arranged on the positioning swing rod (502), and the movable thimble (6) and the fixed thimble (7) can be abutted to the positioning swing rod (502).

4. A stamping die trimming and positioning apparatus as defined in claim 3, wherein: the swing rod base (501) is provided with a limit column (9) capable of limiting the rotation of the positioning swing rod (502).

5. The stamping die trimming and positioning apparatus as defined in claim 4, wherein: the axis of fixed thimble (7) with the axis of activity thimble (6) all with cope match-plate pattern (1) the direction of cope match-plate pattern (2) compound die keeps unanimous, just fixed thimble (7) with activity thimble (6) dislocation set, just the perpendicular distance between the center pin of fixed thimble (7) with the axis of rotation of location pendulum rod (502) is greater than the perpendicular distance between the center pin of activity thimble (6) with the axis of rotation of location pendulum rod (502).

6. The stamping die trimming and positioning apparatus as defined in claim 5, wherein: one end of the movable thimble (6) and one end of the fixed thimble (7) which is in contact with the positioning swing rod (502) are hemispherical.

7. The stamping die trimming and positioning apparatus as defined in claim 6, wherein: and a chamfer is arranged on one side of the positioning block (503) which is abutted against the edge of the cut on the workpiece (11).

8. The stamping die trimming and positioning apparatus as defined in claim 7, wherein: the movable thimble (6) and the ejection column (8) can respectively provide power through springs (10).

9. The trimming and positioning method for a stamping die according to any one of claims 1 to 8, characterized in that: comprises the following steps of;

step one, the upper die plate (1) is separated from the lower die plate (2), and a plurality of positioning blocks (503) are arranged on the punching platform (4) in a surrounding manner under the elastic support of the movable ejector pins (6) by the positioning pieces (5) to form a limiting area for limiting the movement of the workpiece (11);

step two, taking out the workpiece (11) subjected to punching from a limiting area, and placing the workpiece (11) which is not subjected to punching in the limiting area on the punching platform (4) so that the edge of a cut on the workpiece (11) can be abutted against the positioning block (503);

step three, the upper die plate (1) and the lower die plate (2) are clamped, the ejector column (8) is firstly elastically abutted against the workpiece (11), then the fixed ejector pin (7) is abutted against the positioning swing rod (502), the positioning swing rod (502) is driven to reversely rotate, and finally the cut edge on the workpiece (11) is punched through the punching cutter (3);

and fourth, repeating the first, second and third steps.