Stamping die

Abstract

The utility model provides a stamping die which comprises an upper die base and a lower die base, the lower end of the upper die base is connected with a punching male die and a trimming female die, and the upper end of the lower die base is connected with a punching female die and a trimming male die. A shaping pressing plate is further arranged at the lower end of the upper die base, a limiting boss is arranged on the outer wall of the upper end of the shaping pressing plate in an outward protruding mode, a limiting groove is formed in the inner wall of the upper end of the trimming female die, and the limiting boss is movably assembled in the limiting groove. An elastic piece used for driving the shaping pressing plate to always have the downward movement tendency is arranged between the shaping pressing plate and the upper die base, and the lower end of the shaping pressing plate is provided with a first leveling plane and a second leveling plane which are separated inwards and outwards in the radial direction. According to the stamping die disclosed by the utility model, two working procedures of punching the center hole of the workpiece and trimming the outer edge of the workpiece are integrated on one set of die, and the workpiece can be shaped and leveled, so that not only is the processing efficiency improved, but also the qualified rate of finished products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to die technical field, specifically, relates to a stamping die. BACKGROUND

[0002] Attached Figure 1 , 2 It is a thin-walled stamping part, and its conventional processing mode generally needs two processes, the first process is center hole punching, and the second process is outer edge trimming.

[0003] In the prior art, the two processes of the thin-walled stamping part are generally processed by two dies, and the workpiece needs to be positioned twice in the intermediate process, which not only increases the processing cost, but also causes material deformation in the center hole punching process due to the thinness of the workpiece and the special shape of the workpiece itself, thereby leading to inaccurate trimming position in the second trimming process, and even possibly causing secondary deformation of the workpiece, and finally reducing the qualified rate of finished products. INVENTION CONTENTS

[0004] To overcome at least one defect in the prior art, the utility model provides a stamping die, which integrates the workpiece center hole punching and outer edge trimming two processes on one die, and can shape and flatten the workpiece, which not only improves the processing efficiency, but also improves the qualified rate of finished products.

[0005] The utility model provides a stamping die: including upper die holder and lower die holder, the lower extreme of upper die holder is connected with punch convex die and trimming concave die, and trimming concave die is located the punch convex die radial outside, the upper extreme of lower die holder is connected with punch concave die who is compatible with punch convex die and trimming convex die who is compatible with trimming concave die, the lower extreme of upper die holder still be provided with the shaping pressboard that is located between punch convex die and trimming concave die and can slide up and down radially, the outer wall of upper end of shaping pressboard is provided with the limit boss that is convex outward, the inner wall of upper end of trimming concave die is provided with the limit recess, the limit boss is movably assembled in the limit recess, the elastic piece for driving shaping pressboard always has the downward movement tendency between shaping pressboard and upper die holder, the lower extreme of shaping pressboard is provided with the first flattening surface and the second flattening surface that are separated along the radial direction, and the first flattening surface, the second flattening surface correspond to the plane section of workpiece close to punching inner hole and the horizontal flange section of workpiece periphery respectively.

[0006] The stamping die of the utility model has the following advantages compared with the prior art.

[0007] The utility model discloses a stamping die structure, in order to guarantee that the key position size of workpiece does not deform, improve the two processes of existing one process, install trimming die and punching die between upper die seat and lower die seat simultaneously, complete the punching of workpiece's inner hole and the cutting of outer peripheral annular excess material simultaneously, in addition to this, still increase shaping pressboard and pre -press spring part in upper die part, when working, upper die seat and lower die seat close, shaping pressboard first contacts workpiece upper surface under the action of elastic part, and it is pre -pressed, upper die seat continues to go down, trimming die carries out trimming to workpiece's outer periphery, and punching die punches workpiece's inner hole at the same time, after the structure of shaping pressboard and elastic part increases, can make workpiece cover flat area reduce body deformation under the action of external force, guarantee cover flat area even, punch center hole at the same time, workpiece does not deform, and center hole position degree does not change, improve product piece one time pass rate, in addition, punch center hole and punch workpiece annular excess material simultaneously after one positioning, reduce secondary positioning, improve production efficiency, also reduce operator's labor intensity simultaneously, eliminate production safety hidden danger.

[0008] Further, the elastic member includes three springs, three spring holes are formed on the lower end surface of the upper die seat and distributed circumferentially, the upper ends of the three springs are respectively positioned in the three spring holes, and the lower ends of the three springs abut against the upper end surface of the shaping pressboard.

[0009] As an improvement, the upper end of the upper die seat is connected with an upper bottom plate, a mounting channel is formed in the middle of the upper bottom plate, a positioning plate that can move up and down is arranged in the mounting channel, a positioning rod connected to a die frame is arranged above the positioning plate, mounting holes extending upward to the mounting channel are formed in the bottoms of the three spring holes, a jack is slidingly arranged in each of the three mounting holes, and the three springs are movably sleeved outside the lower ends of the three jacks, when the upper die seat is lowered to a set flattening position, the upper and lower ends of the three jacks abut against the positioning plate and the shaping pressboard, and the upper end of the positioning plate abuts against the positioning rod.

[0010] As a further improvement, a waste cutter is connected to the lower die seat at a position corresponding to the trimming punch, and the waste cutter is used to cut off the annular waste after the trimming of the outer edge of the workpiece is completed. In the improved structure, the annular waste is cut off by the waste cutter after the trimming of the outer edge of the workpiece is completed, and the cut-off waste is more easily dropped into the waste groove, avoiding accumulation.

[0011] As a further improvement, a plurality of guide columns are arranged on the lower die seat, and a plurality of guide sleeves are arranged on the upper die seat and slidingly arranged outside the guide columns. In the improved structure, the guide structure makes the up-and-down movement of the upper die seat more stable, improving the punching stability of the workpiece.

[0012] Further improved, the lower die seat is further provided with a plurality of limiting columns, and the lower end surface of the upper die seat abuts against the top of each limiting column when the upper die seat descends to the limit position.

[0013] Further improved, the lower end surface of the upper die seat is connected with an upper base plate, the lower end surface of the upper base plate is connected with an upper fixed plate, the upper end of the trimming die is connected with the upper fixed plate, the middle part of the upper fixed plate is provided with an avoiding hole, the upper end of the punching male die passes through the avoiding hole and is connected with the upper base plate, the upper fixed plate is provided with three first communication holes, the upper base plate is provided with three second communication holes coaxial with the first communication holes and used for slidingly penetrating positioning rods, the diameter of the first communication hole is larger than that of the second communication hole, the upper end of each spring is arranged in the first communication hole, and the upper end of the spring abuts against the lower bottom surface of the upper base plate.

[0014] Further improved, the lower end of the upper fixed plate is further provided with an anti-mistake pin outwardly protruding, and the upper end of the shaping pressing plate is provided with an anti-mistake pin hole used for inserting and cooperating with the anti-mistake pin.

[0015] Other improved features and advantages of the present application will be set forth in the following detailed description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the present application can be realized and attained by means of the instrumentalities particularly pointed out in the description and the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural diagram of a clutch cover (workpiece) of the prior art;

[0017] Figure 2 is Figure 1 is a A-A sectional view of the workpiece;

[0018] Figure 3 is a sectional view of the stamping die of the present application;

[0019] Figure 4 is Figure 3 is a partial structure diagram of the punching die part and the trimming die part in

[0020] Figure 5 is a top view of the stamping die of the present application.

[0021] Explanation of reference signs:

[0022] 1, upper die holder; 2, lower die holder; 3, punching punch; 4, trimming die; 5, punching die; 6, trimming punch; 7, shaping pressing plate; 8, limiting boss; 9, limiting groove; 10, elastic piece; 11, first flattening surface; 12, second flattening surface; 13, spring hole; 14, upper bottom plate; 15, mounting channel; 16, positioning plate; 17, positioning rod; 18, ejector rod; 19, waste cutter; 20, guide column; 21, guide sleeve; 22, limiting column; 23, upper backing plate; 24, upper fixed plate; 25, mistake-proof pin; 26, workpiece; 27, flat section; 28, horizontal flange section. DETAILED DESCRIPTION

[0023] Firstly, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0024] In the description of the embodiments of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0025] In the embodiments of the present application, unless otherwise explicitly specified and limited, the "upper end" or "lower end" of the first feature relative to the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0026] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0027] Reference should be made to Figures 1-5As shown, the embodiment of the present application discloses a stamping die, which comprises a die frame, an upper die seat 1 and a lower die seat 2, the lower end of the upper die seat 1 is connected with a punching male die 3 and a trimming female die 4, the trimming female die 4 is located on the radial outer side of the punching male die, the upper end of the lower die seat 2 is connected with a punching female die 5 matched with the punching male die 3 and a trimming male die 6 matched with the trimming female die 4; the lower end of the upper die seat 1 is further provided with a shaping pressing plate 7 which is located between the punching male die 3 and the trimming female die 4 in the radial direction and can slide up and down, a limiting boss 8 is arranged on the outer wall of the upper end of the shaping pressing plate 7 in the outward protruding mode, a limiting groove 9 is arranged on the inner wall of the upper end of the trimming female die 4, the limiting boss 8 is movably fitted in the limiting groove 9, an elastic member 10 is arranged between the shaping pressing plate 7 and the upper die seat 1 for driving the shaping pressing plate 7 to always have a downward movement trend, and when the upper die seat 1 is opened and moves upward, the shaping pressing plate 7 moves downward under the action of the elastic member 10 until the limiting boss 8 abuts against the bottom of the limiting groove 9; more specifically, the lower end of the shaping pressing plate 7 is provided with a first flattening surface 11 and a second flattening surface 12 which are separated along the radial direction, and the first flattening surface 11 and the second flattening surface 12 correspond to a plane section 27 close to a trimming inner hole of a workpiece 26 and a horizontal flange section 28 of the workpiece 26 respectively.

[0028] In the above structure, in order to adapt to the workpiece 26 with a circular structure, the punching male die 3, the trimming female die 4, the punching female die 5 and the trimming male die 6 are all circular structures.

[0029] In the embodiment, preferably, the elastic member 10 comprises three springs, three spring holes 13 which are uniformly distributed in the circumferential direction are formed on the lower end face of the upper die seat 1, the upper ends of the three springs are respectively fitted and positioned in the three spring holes 13, and the lower ends of the three springs all abut against the upper end face of the shaping pressing plate 7.

[0030] In other embodiments, the number of springs can also be four or even more.

[0031] In addition, referring to the drawings, Figure 3In the embodiment, an upper base plate 14 is connected to the upper end of the upper die holder 1, a mounting channel 15 is formed in the middle of the upper base plate 14, a positioning plate 16 that can move up and down is arranged in the mounting channel 15, a plurality of countersunk through holes are formed in the upper end face of the positioning plate 16, a screw is connected to each of the countersunk through holes, the end of the screw is connected to the upper die holder 1, and a gap is left between the head of the screw and the bottom of the large-diameter hole of the countersunk through hole, that is, the positioning plate 16 can move up and down within a set displacement; a positioning rod 17 connected to the die frame is arranged directly above the positioning plate 16 and is used to limit the upward distance of the positioning plate 16; mounting holes extending upward to the mounting channel 15 are formed in the bottom of each of the three spring holes 13, a top rod 18 is slidingly arranged in each of the three mounting holes, and three springs are movably sleeved outside the lower ends of the three top rods 18. When the upper die holder 1 is lowered to a set flattening position to close the mold, the upper and lower ends of the three top rods 18 respectively abut against the positioning plate 16 and the shaping pressing plate 7, and the upper end of the positioning plate 16 abuts against the positioning rod 17. After the upper and lower ends of the top rod 18 are limited, the shaping pressing plate 7 no longer moves, thereby stably positioning the flat section 27 of the workpiece 26. At this time, the upper die holder 1 continues to be lowered, and the outer periphery and the inner hole of the workpiece 26 are correspondingly trimmed and punched.

[0032] In another aspect, the outer periphery of the workpiece 26 is cut to form a ring-shaped waste material, which is not easy to remove. If the waste material accumulates too much, it will affect the subsequent trimming efficiency. Therefore, a waste material cutter 19 is connected to the lower die holder 2 at a position corresponding to the trimming punch 6. After the outer edge of the workpiece 26 is trimmed, the ring-shaped waste material will be cut by the waste material cutter 19, and the cut waste material is more easily dropped into the waste material groove, thereby avoiding material accumulation.

[0033] In the embodiment, a plurality of guide columns 20 are arranged on the lower die holder 2, and a plurality of guide sleeves 21 are arranged on the upper die holder 1 and slidingly arranged outside the guide columns 20, respectively. A plurality of limiting columns 22 are further arranged on the lower die holder 2, and the lower end face of the upper die holder 1 abuts against the top of each limiting column 22 when the upper die holder 1 is lowered to a limit position. Preferably, the guide columns 20 are three, and the limiting columns 22 are also three, and the three guide columns 20 and the three limiting columns 22 are distributed in a rectangular shape as a whole. More specifically, two of the three guide columns 20 are located on the left side of the lower die holder 2 and are symmetrically arranged front and back, and the third guide column 20 is located on the back side of the lower die holder 2. Two of the three limiting columns 22 are located on the right side of the lower die holder 2 and are symmetrically arranged on the front and back sides of the third guide column 20, and the third limiting column 22 is located on the left side of the lower die holder 2 and is located between the two corresponding guide columns 20.

[0034] Continuing to refer to the drawings Figure 3 and 4In order to realize the connection and fixation of the corresponding parts, the upper die base 1 is connected with an upper backing plate 23 at the lower end surface, the lower end surface of the upper backing plate 23 is connected with an upper fixed plate 24, the upper end of the trimming concave die 4 is connected with the upper fixed plate 24, the middle part of the upper fixed plate 24 is provided with an avoiding hole, the upper end of the punching convex die 3 is connected with the upper backing plate 23 through the avoiding hole; three first communication holes are provided on the upper fixed plate 24, three second communication holes coaxial with the first communication holes and used for slidingly penetrating the positioning rod 17 are provided on the upper backing plate 23, and the diameter of the first communication hole is larger than that of the second communication hole, the upper end of each spring is arranged in the first communication hole, and the upper end of the spring abuts against the lower bottom surface of the upper backing plate 23.

[0035] Further, in the above structure, the lower end of the upper fixed plate 24 is further provided with an anti-mistake pin 25, and the upper end of the shaping pressing plate 7 is provided with an anti-mistake pin hole used for inserting and cooperating with the anti-mistake pin 25, this structure prevents and limits the installation position of the shaping pressing plate 7, because the shapes of the left and right sides of the workpiece 26 are asymmetric, the left and right ends of the shaping pressing plate 7 are not universal, so it is necessary to be installed according to the set angle.

[0036] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms indicating the direction or position relationship of "up and down", "left and right" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In the description of the present application, the description of the terms "the present embodiment", "some embodiments" and the like means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, those skilled in the art can combine and combine the different embodiments or features of the embodiments or examples described in the present specification without contradiction.

[0038] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A punch-die comprising an upper die seat (1) and a lower die seat (2), characterized in that: The lower end of the upper die holder (1) is connected with a punching male die (3) and a trimming female die (4), and the trimming female die (4) is located on the radial outer side of the punching male die, the upper end of the lower die holder (2) is connected with a punching female die (5) matched with the punching male die (3) and a trimming male die (6) matched with the trimming female die (4); the lower end of the upper die holder (1) is further provided with a shaping pressing plate (7) which is radially located between the punching male die (3) and the trimming female die (4) and can slide up and down, a limiting boss (8) is provided on the outer wall of the upper end of the shaping pressing plate (7), a limiting groove (9) is provided on the inner wall of the upper end of the trimming female die (4), the limiting boss (8) is movably fitted in the limiting groove (9), an elastic member (10) is arranged between the shaping pressing plate (7) and the upper die holder (1) for driving the shaping pressing plate (7) to always have a downward movement trend, the lower end of the shaping pressing plate (7) is provided with a first flattening surface (11) and a second flattening surface (12) which are separated along the radial direction, and the first flattening surface (11) and the second flattening surface (12) correspond to a plane section (27) near the inner hole of the workpiece (26) and a horizontal flange section (28) on the outer periphery of the workpiece (26) respectively.

2. The stamping die of claim 1, wherein: The elastic member (10) includes three springs, three spring holes (13) are formed on the lower end face of the upper die holder (1) and are distributed in the circumferential direction, the upper ends of the three springs are respectively positioned and fitted in the three spring holes (13), and the lower ends of the three springs are all in abutment with the upper end face of the shaping pressing plate (7).

3. The stamping die of claim 2, wherein: The upper end of the upper die holder (1) is connected with an upper bottom plate (14), a mounting channel (15) is formed in the middle part of the upper bottom plate (14), a positioning plate (16) which can move up and down is arranged in the mounting channel (15), a positioning rod (17) connected to a die frame is arranged above the positioning plate (16), mounting holes which extend upward to the mounting channel (15) are formed in the bottoms of the three spring holes (13), three top rods (18) are slidably fitted in the three mounting holes, and the three springs are movably sleeved on the outer parts of the lower ends of the three top rods (18), when the upper die holder (1) is lowered to a set flattening position, the upper and lower ends of the three top rods (18) are respectively in abutment with the positioning plate (16) and the shaping pressing plate (7), and the upper end of the positioning plate (16) is in abutment with the positioning rod (17).

4. The stamping die of claim 1, wherein: The lower die holder (2) is connected with a waste cutting knife (19) at a position corresponding to the trimming male die (6), and the waste cutting knife (19) is used to cut off the annular waste after the outer edge trimming of the workpiece (26) is completed.

5. The press tool according to any one of claims 1 to 4, characterized in that: The lower die holder (2) is provided with a plurality of guide columns (20), and the upper die holder (1) is provided with a plurality of guide sleeves (21) which are respectively slidably fitted on the outer parts of the guide columns (20).

6. The stamping die of claim 5, wherein: A plurality of limiting columns (22) are arranged on the lower die seat (2), and the lower end surface of the upper die seat (1) abuts against the top of each limiting column (22) when the upper die seat (1) is lowered to the limit position.

7. The stamping die of claim 2 or 3, wherein: The lower end surface of the upper die seat (1) is connected with an upper base plate (23), the lower end surface of the upper base plate (23) is connected with an upper fixed plate (24), the upper end of the trimming die (4) is connected with the upper fixed plate (24), the middle part of the upper fixed plate (24) is provided with an avoiding hole, the upper end of the punching punch (3) passes through the avoiding hole and is connected with the upper base plate (23); the upper fixed plate (24) is provided with three first communication holes, the upper base plate (23) is provided with three second communication holes coaxial with the first communication holes and used for slidingly penetrating the positioning rods (17), and the diameter of the first communication holes is greater than that of the second communication holes, the upper end of each spring is arranged in the first communication hole, and the upper end of the spring abuts against the lower bottom surface of the upper base plate (23).

8. The stamping die of claim 7, wherein: The lower end of the upper fixed plate (24) is further provided with an anti-mistake pin (25), and the upper end of the shaping pressing plate (7) is provided with an anti-mistake pin hole used for plug-in cooperation of the anti-mistake pin (25).

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