Negative angle shaping and scraping composite structure of stamping die

Abstract

The utility model relates to the technical field of stamping dies, and discloses a negative angle shaping and scraping composite structure of a stamping die, which comprises a first lower pressure plate driving seat, a second lower pressure plate driving seat and a third lower pressure plate driving seat, the second lower material pressing plate driving seat is in sliding connection with the lower die, and when the first lower material pressing plate driving seat moves downwards, the second lower material pressing plate driving seat can be driven to move backwards; the lower pressure plate fixing seat is fixedly mounted on the lower die and is positioned on the right side of the second lower pressure plate driving seat; the lower material pressing plate is arranged on the upper right portion of the second lower material pressing plate driving seat, and when the second lower material pressing plate driving seat moves backwards, the lower material pressing plate can be driven to move towards the upper right portion; the scraping mechanism comprises a scraping plate which is connected with the lower pressing plate fixing seat through an elastic piece; and the scraping plate driving block is mounted at the bottom of the flanging insert fixing seat of the upper die. And the scraping mechanism is additionally arranged, so that the workpiece can be ejected out through the scraping plate after the negative angle flanging is finished, the wedge stroke of the lower pressing plate is reduced, the space occupation of the die is reduced, and the size of the die is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, and more specifically to a negative angle shaping and scraping composite structure of a stamping die. Background Art

[0002] With the rapid development of the automobile industry, people have higher and higher requirements for automobiles, the shape of automobile stamping parts has become more and more complex, and the requirements for stamping dies have become higher and higher. In the process of forming automobile stamping parts, after selecting the stamping direction that is most conducive to forming, some flange surfaces will form a negative angle with the stamping direction, resulting in the workpiece after stamping being unable to be removed from the punch.

[0003] The existing technical solution usually uses an inclined wedge mechanism to withdraw the punch from the negative angle area of ​​the workpiece. When the flanging length is large, the inclined wedge stroke will be longer, the mold space will be larger, the mold size will increase accordingly, the mold processing, assembly and debugging cycle will increase, the mold manufacturing cost will be high, and the mold maintenance cost will be high. Utility Model Content

[0004] The utility model aims to provide a negative angle shaping and scraping composite structure of a stamping die to solve the problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model is implemented by adopting the following technical solutions:

[0006] A negative angle shaping and scraping composite structure of a stamping die, the stamping die comprises an upper die 100, a lower die 200 and a composite mechanism 300, the upper die 100 comprises an upper die die base 110, an upper pressure plate 120, a flanging insert 130, a flanging insert fixing seat 140 and an upper pressure plate nitrogen spring 150, the upper pressure plate 120 is connected to the upper die die base 110 through the upper pressure plate nitrogen spring 150, the flanging insert 130 is installed on the flanging insert fixing seat 140, the flanging insert fixing seat 140 is slidably connected to the upper die die base 110, and the sliding direction is less than 90° with the vertical direction; the lower die 200 comprises a lower die die base 210, a punch 220 and a flanging insert driving seat 230, and the composite mechanism 300 comprises:

[0007] A first lower pressing plate driving seat 310 is mounted on the bottom surface of the upper die seat 110;

[0008] The second lower blank pressing plate driving seat 320 is slidably connected to the lower die base 210 in the front-to-back direction, and the top of the second lower blank pressing plate driving seat 320 is slidably matched with the inclined surface of the first lower blank pressing plate driving seat 310, and the first lower blank pressing plate driving seat 310 can drive the second lower blank pressing plate driving seat 320 to move backward when the first lower blank pressing plate driving seat 310 moves downward;

[0009] A lower blank holder fixing seat 330 is fixedly mounted on the lower die holder 210 and is located on the right side of the second lower blank holder driving seat 320. A fifth guide surface 331 having the same inclined direction as the sliding direction of the flanging insert fixing seat 140 is provided on the left side of the lower blank holder fixing seat 330;

[0010] The lower pressing plate 340 is arranged on the upper right side of the second lower pressing plate driving seat 320, and the lower pressing plate 340 is slidably connected to the fifth guide surface 331. The bottom of the lower pressing plate 340 is slidably matched with the inclined surface of the second lower pressing plate driving seat 320. When the second lower pressing plate driving seat 320 moves backward, the lower pressing plate 340 can be driven to slide obliquely upward along the fifth guide surface 331;

[0011] The scraper mechanism 350 includes a sleeve 351, a first elastic member 352 and a scraper plate 353. The sleeve 351 is movably arranged inside the lower pressing plate fixing seat 330 along an angle parallel to the fifth guide surface 331. The bottom of the sleeve 351 is connected to the lower pressing plate fixing seat 330 through the first elastic member 352. The top of the sleeve 351 is connected to the scraper plate 353. The left side of the scraper plate 353 extends to the side of the lower pressing plate 340 that contacts the flanging of the workpiece.

[0012] The scraper plate driving block 360 is installed at the bottom of the flange insert fixing seat 140 .

[0013] Furthermore, a first guide surface 311 inclined rearward is provided at a lower rear portion of the first lower pressing plate driving seat 310, and a corresponding second guide surface 321 inclined rearward is provided at an upper front portion of the second lower pressing plate driving seat 320, and the second guide surface 321 is slidably matched with the inclined surface of the first guide surface 311.

[0014] Furthermore, a third guide surface 322 inclined to the left is provided at the upper right portion of the second lower pressing plate driving seat 320 , and a fourth guide surface 341 slidably matched with the inclined surface of the third guide surface 322 is provided at the bottom of the lower pressing plate 340 .

[0015] Furthermore, a second elastic member 370 is disposed between the second lower blank holder driving seat 320 and the lower die holder 210 , and when the second lower blank holder driving seat 320 moves backward, the second elastic member 370 is compressed.

[0016] Furthermore, the first elastic member 352 and the second elastic member 370 are both nitrogen springs.

[0017] Furthermore, a vertical plate 354 is provided on the left side of the scraper plate 353 and is parallel to the side of the lower pressing plate 340 that contacts the flange of the workpiece.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model provides a negative angle shaping and scraping composite structure of a stamping die, which can realize negative angle flanging and material removal in a smaller space. By adding a scraping mechanism, during the downward flanging process, the scraper plate is acted upon by a scraper plate driving block installed on the upper die to shrink and avoid obliquely downward. After the negative angle flanging is completed, the elastic part is reset to push the scraper plate obliquely upward, and the scraper plate pushes the workpiece out.

[0020] The utility model provides a negative angle shaping and scraping composite structure of a stamping die, which can reduce the wedge stroke of a lower pressing plate, reduce the space occupied by the die, and reduce the size of the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Figure 1 is a front view of a stamping die in one embodiment;

[0023] Figure 2 is a front view of an upper die in one embodiment;

[0024] Figure 3 is a side view of an upper mold in one embodiment;

[0025] Figure 4 is a cross-sectional view of an upper mold in one embodiment;

[0026] Figure 5 A front view of a lower mold in one embodiment;

[0027] Figure 6 is a front view of a composite mechanism in one embodiment;

[0028] Figure 7 is a side view of a composite mechanism in one embodiment;

[0029] Figure 8 A front view of a scraping mechanism in one embodiment;

[0030] Fig. 9 is a partial cross-sectional view of a composite mechanism in one embodiment;

[0031] Fig.10 A schematic diagram of the structure of a lower pressing plate in one embodiment;

[0032] Fig.11 Schematic diagram of the structure of the second lower pressing plate driving seat in one embodiment;

[0033] Fig.12A schematic diagram of the structure of a lower pressing plate fixing seat in one embodiment;

[0034] 100. Upper die, 110. Upper die seat, 120. Upper press plate, 130. Flanging insert, 140. Flanging insert fixing seat, 150. Upper press plate nitrogen spring;

[0035] 200. lower die, 210. lower die base, 220. punch, 230. flanging insert drive seat;

[0036] 300. composite mechanism, 310. first lower pressing plate driving seat, 311. first guide surface, 320. second lower pressing plate driving seat, 321. second guide surface, 322. third guide surface, 330. lower pressing plate fixing seat, 331. fifth guide surface, 340. lower pressing plate, 341. fourth guide surface, 350. scraper mechanism, 351. sleeve, 352. first elastic member, 353. scraper plate, 354. vertical plate, 360. scraper plate driving block, 370. second elastic member;

[0037] X1. Front, X2. Back, Y1. Right, Y2. Left, Z1. Top, Z2. Bottom. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of an embodiment, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] See also Figures 1 to 12 This embodiment provides a negative angle shaping and scraping composite structure of a stamping die, which is applied to a negative angle flanging stamping die. The stamping die includes an upper die 100, a lower die 200 and a composite structure 300.

[0040] The upper mold 100 includes an upper mold base 110, an upper pressure plate 120, a flanging insert 130, a flanging insert fixing seat 140 and an upper pressure plate nitrogen spring 150. The upper pressure plate 120 is connected to the upper mold base 110 via the upper pressure plate nitrogen spring 150. The flanging insert 130 is installed on the flanging insert fixing seat 140. The flanging insert fixing seat 140 is slidably connected to the upper mold base 110, and the sliding direction forms an angle less than 90° with the vertical direction.

[0041] The lower die 200 includes a lower die die base 210 , a punch 220 and a flanging insert driving seat 230 . The punch 220 and the flanging insert driving seat 230 are both fixedly installed in the lower die die base 210 .

[0042] The composite mechanism 300 includes: a first lower pressing plate driving seat 310 , a second lower pressing plate driving seat 320 , a lower pressing plate fixing seat 330 , a lower pressing plate 340 , a scraping mechanism 350 , a scraping plate driving block 360 and a second elastic member 370 .

[0043] The first lower pressing plate driving seat 310 is installed on the bottom surface of the upper die holder 110 , and a first guide surface 311 inclined toward the rear X2 is provided at the lower rear portion of the first lower pressing plate driving seat 310 .

[0044] The second lower pressing plate driving seat 320 and the lower die seat 210 can be slidably connected in the front-to-back direction, and are correspondingly arranged at Z2 below the first lower pressing plate driving seat 310. The top of the second lower pressing plate driving seat 320 is slidably matched with the inclined surface of the first lower pressing plate driving seat 310. Corresponding to the first guide surface 311, the front upper part of the second lower pressing plate driving seat 320 is provided with a second guide surface 321 inclined toward the rear X2. The second guide surface 321 is slidably matched with the inclined surface of the first guide surface 311. When the first lower pressing plate driving seat 310 moves downward Z2, it can drive the second lower pressing plate driving seat 320 to move backward X2.

[0045] The lower pressing plate fixing seat 330 is fixedly installed on the lower die base 210 and is located on the right side of the second lower pressing plate driving seat 320. A fifth guide surface 331 with the same inclined direction as the sliding direction of the flanging insert fixing seat 140 is provided on the left side of the lower pressing plate fixing seat 330.

[0046] The lower pressing plate 340 is arranged on the upper right side of the second lower pressing plate driving seat 320, and the lower pressing plate 340 is slidably connected to the fifth guide surface 331. The bottom of the lower pressing plate 340 is slidably matched with the inclined surface of the second lower pressing plate driving seat 320. In this embodiment, the upper right part of the second lower pressing plate driving seat 320 is provided with a third guide surface 322 inclined to the left side, and the bottom of the lower pressing plate 340 is provided with a fourth guide surface 341 slidably matched with the inclined surface of the third guide surface 322. When the second lower pressing plate driving seat 320 moves backward X2, it can drive the lower pressing plate 340 to slide obliquely upward along the fifth guide surface 331.

[0047] The scraper mechanism 350 includes a sleeve 351, a first elastic member 352 and a scraper plate 353. The sleeve 351 is movably arranged inside the lower pressing plate fixing seat 330 along an angle parallel to the fifth guide surface 331. The bottom of the sleeve 351 is connected to the lower pressing plate fixing seat 330 through the first elastic member 352. The top of the sleeve 351 is connected to the scraper plate 353. The left side edge of the scraper plate 353 extends to the side of the lower pressing plate 340 that contacts the workpiece flange. In this embodiment, the left side edge of the scraper plate 353 is provided with a vertical plate 354 parallel to the side of the lower pressing plate 340 that contacts the workpiece flange. The vertical plate 354 is in surface contact with the side of the lower pressing plate 340 that contacts the workpiece flange, which can better achieve the lifting effect.

[0048] The scraper plate driving block 360 is installed at the bottom of the flanging insert fixing seat 140. When the flanging insert fixing seat 140 moves downward to drive the flanging insert 130 to flanging, the scraper plate driving block 360 contacts the scraper plate 353, squeezes the scraper plate 353 downward, and compresses the first elastic member 352.

[0049] The second elastic member 370 is arranged between the second lower pressing plate driving seat 320 and the lower mold seat 210. When the second lower pressing plate driving seat 320 is forced to move backward X2, the second elastic member 370 is compressed. When the force is eliminated, the second elastic member 370 is reset to drive the second lower pressing plate driving seat 320 back to the initial position.

[0050] In this embodiment, both the first elastic member 352 and the second elastic member 370 are nitrogen springs.

[0051] The working process of the negative angle shaping and scraping composite structure of a stamping die provided in this embodiment is as follows:

[0052] The process part is placed on the punch 220, and the process part is fixed by the combined action of the conformal surface of the punch 220 and the positioning pin.

[0053] The upper die seat 110 moves downward Z2 under the action of the press slider, the first lower blank plate driving seat 310 contacts the second lower blank plate driving seat 320, and the second lower blank plate driving seat 320 moves backward X2 under the action of the first lower blank plate driving seat 310. The lower blank plate 340 moves to the upper right under the joint action of the second lower blank plate driving seat 320, the punch 220 and the lower blank plate fixing seat 330, and the lower blank plate 340 and the punch 220 jointly play the role of supporting the process parts.

[0054] The upper pressing plate 120 stops moving after contacting the process part, and the upper die holder 110 continues to move downward Z2. The upper pressing plate nitrogen spring 150 begins to be compressed by the upper die holder 110. The upper pressing plate 120 is pressed against the process part by the upper pressing plate nitrogen spring 150, and slides relative to the upper die holder 110.

[0055] The upper die holder 110 continues to move downward Z2, the flanging insert fixing seat 140 contacts the flanging insert driving seat 230, and the flanging insert fixing seat 140 moves downward to the left under the joint action of the upper die holder 110 and the flanging insert driving seat 230.

[0056] The scraper plate driving block 360 moves to the lower left under the action of the flanging insert fixing seat 140, and the scraper plate driving block 360 contacts the scraper plate 353. The scraper plate 353 moves to the lower left under the action of the scraper plate driving block 360, and the first elastic member 352 begins to compress; at the same time, the flanging insert 130 moves to the lower left under the action of the flanging insert fixing seat 140, and begins to perform negative angle flanging on the process part.

[0057] When flanging is completed, the upper die holder 110 moves upward Z1 under the action of the press slider, and the flanging insert fixing seat 140 moves upward rightward under the joint action of the upper die holder 110 and the flanging insert driving seat 230 .

[0058] The scraper driving block 360 and the flanging insert 130 move to the upper right along with the flanging insert fixing seat 140 , and the scraper 353 also moves to the upper right under the release of the first elastic member 352 , and the scraper 353 lifts the process part.

[0059] The upper die holder 110 continues to move upward, and due to the action of the upper blank holder nitrogen spring 150, the upper blank holder 120 is in a stationary state and slides relative to the upper die holder 110. When the upper blank holder nitrogen spring 150 is released, the upper blank holder 120 moves upward Z1 together with the upper die holder 110.

[0060] The upper die holder 110 continues to move upward Z1, the first lower press plate driving seat 310 no longer contacts the second lower press plate driving seat 320, and the second lower press plate driving seat 320 moves forward X1 under the release action of the second elastic member 370. The lower press plate 340 moves to the lower left under the combined action of its own gravity, the punch 220 and the lower press plate fixing seat 330, and returns to its initial state.

[0061] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative angle shaping and scraping composite structure of a stamping die, the stamping die comprising an upper die (100), a lower die (200) and a composite structure (300), the upper die (100) comprising an upper die die seat (110), an upper press plate (120), a flanging insert (130), a flanging insert fixing seat (140) and an upper press plate nitrogen spring (150), the upper press plate (120) being connected to the upper press plate nitrogen spring (150) 150) is connected to the upper die base (110), the flanging insert (130) is installed on the flanging insert fixing seat (140), the flanging insert fixing seat (140) is slidably connected to the upper die base (110), and the sliding direction is less than 90° with the vertical direction; the lower die (200) includes a lower die base (210), a punch (220) and a flanging insert driving seat (230), characterized in that, The composite structure (300) comprises: A first lower pressing plate driving seat (310) is mounted on the bottom surface of the upper die seat (110); A second lower pressing plate driving seat (320) is slidably connected to the lower die seat (210) in the front-to-back direction, the top of the second lower pressing plate driving seat (320) is slidably matched with the inclined surface of the first lower pressing plate driving seat (310), and when the first lower pressing plate driving seat (310) moves downward, it can drive the second lower pressing plate driving seat (320) to move backward; A lower blank holder fixing seat (330) is fixedly mounted on the lower die seat (210) and is located on the right side of the second lower blank holder driving seat (320); a fifth guide surface (331) having the same inclination direction as the sliding direction of the flanging insert fixing seat (140) is provided on the left side of the lower blank holder fixing seat (330); A lower pressing plate (340) is arranged on the upper right side of the second lower pressing plate driving seat (320), and the lower pressing plate (340) is slidably connected to the fifth guide surface (331). The bottom of the lower pressing plate (340) is slidably matched with the inclined surface of the second lower pressing plate driving seat (320). When the second lower pressing plate driving seat (320) moves backward, it can drive the lower pressing plate (340) to slide obliquely upward along the fifth guide surface (331); A scraper mechanism (350) comprises a sleeve (351), a first elastic member (352) and a scraper plate (353), wherein the sleeve (351) is movably arranged inside the lower pressing plate fixing seat (330) along an angle parallel to the fifth guide surface (331), the bottom of the sleeve (351) is connected to the lower pressing plate fixing seat (330) through the first elastic member (352), the top of the sleeve (351) is connected to the scraper plate (353), and the left side of the scraper plate (353) extends to the side of the lower pressing plate (340) contacting the flanging of the workpiece; The scraper plate driving block (360) is installed at the bottom of the flange insert fixing seat (140).

2. The negative angle shaping and scraping composite structure of a stamping die according to claim 1, characterized in that: The first lower pressing plate driving seat (310) is provided with a first guide surface (311) inclined toward the rear at the lower rear portion, and the corresponding second lower pressing plate driving seat (320) is provided with a second guide surface (321) inclined toward the rear at the upper front portion, and the second guide surface (321) is slidably matched with the inclined surface of the first guide surface (311).

3. The negative angle shaping and scraping composite structure of a stamping die according to claim 2, characterized in that: A third guide surface (322) inclined to the left is provided at the upper right portion of the second lower pressing plate driving seat (320), and a fourth guide surface (341) slidably matched with the inclined surface of the third guide surface (322) is provided at the bottom of the lower pressing plate (340).

4. The negative angle shaping and scraping composite structure of a stamping die according to claim 1, characterized in that: A second elastic member (370) is provided between the second lower pressing plate driving seat (320) and the lower die seat (210), and when the second lower pressing plate driving seat (320) moves backward, the second elastic member (370) is compressed.

5. The negative angle shaping and scraping composite structure of a stamping die according to claim 4, characterized in that: The first elastic member (352) and the second elastic member (370) are both nitrogen springs.

6. The negative angle shaping and scraping composite structure of a stamping die according to claim 1, characterized in that: The left side of the scraper plate (353) is provided with a vertical plate (354) parallel to the side of the lower pressing plate (340) that contacts the workpiece flange.

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