Progressive die structure for carrying out negative-angle bending adjustment on workpiece

Abstract

The utility model discloses a progressive die structure for carrying out negative angle bending adjustment on a workpiece, a first upper ejector rod, a stripper plate inclined sliding block and a second upper ejector rod are arranged on an upper die part of a die, the stripper plate inclined sliding block is arranged on a stripper plate in a sliding manner, and the bottom of the first upper ejector rod acts on the stripper plate inclined sliding block; the lower die part is provided with a female die inclined sliding block, a female die floating block and a lower ejector rod. The female die inclined sliding block is provided with a guide sliding face facing the to-be-bent part of the workpiece. The top of the lower ejector rod elastically acts on the female die inclined sliding block, and the female die floating block is arranged on the lower die base in a sliding mode through a bottom spring. In the mold closing process, the inclined sliding block of the discharging plate is embedded into the right side inside position of the bent part of the workpiece to form a support; then, the discharging plate moves downwards to the position of a lower dead center, and pressing and positioning of the workpiece are completed; and then the upper die base drives the second upper ejector rod to press the concave die inclined sliding block downwards, so that the concave die inclined sliding block moves towards the inclined lower part, and negative angle bending adjustment is carried out on the to-be-bent part of the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of metal forming technology, and in particular to a progressive die structure for adjusting the negative angle of a workpiece. Background Technology

[0002] In the field of metal forming and processing, negative angle bending of workpieces is a common processing requirement. The conventional solution for negative angle bending of workpieces is to rotate the product by an angle to eliminate the negative angle. However, since the reference surface and reference hole of the product also rotate after rotation, it is necessary to punch holes from the side or rotate the product again for punching, which involves many and complicated processes.

[0003] Using a progressive die with a side-adjusting wedge to side-bend a workpiece is also a bending process. However, conventional side-adjusting wedges are too large, and the space of the progressive die is limited, requiring additional empty steps to create more die space for installation. Therefore, this invention designs a progressive die structure for negative angle bending adjustment of workpieces. It occupies little space, is particularly suitable for negative angle bending operations in confined spaces, and is convenient for installation and die debugging during production. Utility Model Content

[0004] The purpose of this invention is to address the problem that the space of the progressive die in the existing technology is too small to install conventional standard wedges, and to provide a progressive die structure for adjusting the negative angle of the workpiece.

[0005] The technical solution adopted to achieve the purpose of this utility model is:

[0006] A progressive die structure for adjusting a workpiece by negative angle bending includes an upper die portion and a lower die portion:

[0007] The upper mold part includes an upper mold base, a stripper plate, a first upper ejector rod, a stripper plate inclined slider, a first stripper plate fixing block, a second stripper plate fixing block, and a second upper ejector rod;

[0008] The unloading plate and the upper mold base are slidably connected by a first upper ejector rod and a second upper ejector rod. The unloading plate inclined slider is slidably mounted on the unloading plate. The unloading plate is provided with a mounting groove for mounting the unloading plate inclined slider. The first upper ejector rod is slidably mounted vertically in the unloading plate and the upper mold base. An upper ejector rod limiting block is provided at the top of the first upper ejector rod to limit the downward movement direction of the first upper ejector rod. A spring is also provided at the top of the first upper ejector rod to provide a downward elastic force for the first upper ejector rod. Through the spring, the bottom of the first upper ejector rod acts on the unloading plate inclined slider.

[0009] The first unloading plate fixing block and the second unloading plate fixing block are fixedly mounted on the unloading plate and slide in cooperation with the unloading plate inclined slider. The top end of the second upper ejector rod is fixedly mounted on the upper mold base, and the rod body is slidably mounted with the second unloading plate fixing block.

[0010] A limiting top plate is also fixedly installed on the top of the unloading plate. The limiting top plate is used to limit the upward sliding limit position of the unloading plate inclined slider and to position the first unloading plate fixing block and the second unloading plate fixing block in the fixed installation position of the unloading plate.

[0011] The lower mold part includes a lower mold base, a cavity mold inclined slide block, a cavity mold floating block, a lower ejector rod, a first cavity mold fixing block, and a second cavity mold fixing block;

[0012] The first die fixing block is fixedly mounted on the lower die base, and the die inclined slider is slidably connected to the first die fixing block; the die inclined slider is provided with a guide sliding surface facing the negative angle bending direction of the workpiece; the lower ejector rod is vertically slidably mounted on the lower die base, and a limiting part is also provided at the bottom of the lower ejector rod to limit the upward cutting direction of the lower ejector rod; a spring is provided at the bottom of the lower ejector rod to provide an upward elastic force for the lower ejector rod, and through the spring, the top of the lower ejector rod acts on the die inclined slider; the die floating block is slidably mounted on the lower die base, and a spring is provided at the bottom of the die floating block to provide an upward elastic force for the die floating block; the second die fixing block is fixedly mounted on the lower die base and slidably connected to the die floating block.

[0013] In the above technical solution, the unloading plate inclined slider is provided with an inclined surface, which slides in cooperation with the first unloading plate fixing block.

[0014] In the above technical solution, the bottom of the first unloading plate fixing block is provided with a downward shaping protrusion. The shaping protrusion and the unloading plate inclined slider are used to ensure that the right inner position of the workpiece bending part is fully fitted and supported during the mold closing process.

[0015] In the above technical solution, a limiting block is provided at the bottom of the second unloading plate fixing block, which slides in cooperation with the limiting block provided at the top of the unloading plate inclined slider.

[0016] In the above technical solution, an inclined sliding surface is provided on one side of the oblique slider of the die cavity, and a vertical limiting part is also provided at the bottom end of the inclined sliding surface to ensure that the oblique slider of the die cavity will not shift obliquely upward in the initial state.

[0017] In the above technical solution, a limiting step is provided at the bottom end of the concave mold floating block.

[0018] In the above technical solution, the bottom end of the second die fixing block is provided with a limiting step that cooperates with the limiting step of the die floating block to limit the upward distance of the die floating block. The second die fixing block is also provided with an inclined surface that cooperates with the bottom of the workpiece.

[0019] In the above technical solution, the first upper ejector rod uses a light load spring, while the lower ejector rod and the die floating block use medium load springs.

[0020] In the above technical solution, the stroke of the stripper plate is 29mm, the stroke of the die floating block is 25mm, the stroke of the die inclined slide block is 8mm, the stroke of the stripper plate inclined slide block is 10mm, the angle of the die inclined slide block is 25°, and the angle of the stripper plate inclined slide block is 8°.

[0021] In the above technical solution, the first unloading plate fixing block and the second unloading plate fixing block are fixed with reverse screws.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. The progressive die structure of this utility model for adjusting the negative angle of a workpiece by first pre-bending it upward to a perpendicular angle with the horizontal direction, and then using a side adjustment mechanism to bend it to a negative angle of 5°.

[0024] 2. The progressive die structure of this utility model for adjusting the negative angle of a workpiece has a small space occupation, is particularly suitable for negative angles in narrow spaces, and is convenient for installation and die debugging in production. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the working steps 1 of the progressive die structure for adjusting the negative angle of a workpiece according to this utility model.

[0026] Figure 2 This is an exploded view of the key components of the progressive die structure for adjusting the negative angle of a workpiece according to this utility model.

[0027] Figure 3 This is a schematic diagram of the working steps 2 of the progressive die structure for adjusting the negative angle of a workpiece according to this utility model.

[0028] Figure 4 This is a schematic diagram of the working steps 3 of the progressive die structure for adjusting the negative angle of a workpiece according to this utility model.

[0029] Figure 5 This is a schematic diagram of the working steps 4 of the progressive die structure for adjusting the negative angle of a workpiece according to this utility model. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] Reference Figure 1 and attached Figure 2 A progressive die structure for adjusting a workpiece by negative angle bending includes an upper die portion and a lower die portion:

[0032] The upper mold part includes an upper mold base 1, a stripper plate 2, a first upper ejector rod 3, a stripper plate inclined slider 4, a first stripper plate fixing block 5, a second stripper plate fixing block 6, and a second upper ejector rod 7.

[0033] The unloading plate 2 and the upper mold base 1 are slidably connected by the first upper ejector rod 3 and the second upper ejector rod 7. The unloading plate inclined slider 4 is slidably disposed on the unloading plate 2. The unloading plate 2 is provided with a mounting groove for installing the unloading plate inclined slider 4.

[0034] The first upper ejector rod 3 is vertically slidably installed in the unloading plate 2 and the upper mold base 1. A spring is provided at the top of the first upper ejector rod 3 to provide a downward elastic force for the first upper ejector rod 3. An upper ejector rod limiting block 31 is provided at the top of the first upper ejector rod 3 to limit the downward movement direction of the first upper ejector rod 3. Through the spring, the bottom of the first upper ejector rod 3 acts on the inclined slider 4 of the unloading plate.

[0035] The first unloading plate fixing block 5 is fixedly mounted on the unloading plate 2 and slides in cooperation with the inclined surface 41 of the unloading plate inclined slider 4. Furthermore, a downward shaping protrusion 51 is provided at the bottom of the first unloading plate fixing block 5. The shaping protrusion 51 and the unloading plate inclined slider 4 are used to ensure that the right inner position of the bending part of the workpiece 8 is fully fitted and supported during the mold closing process, so as to control the forming accuracy of the workpiece 8 and facilitate the full pressure and shaping of the inside of the workpiece 8 during the mold unmolding process.

[0036] The second unloading plate fixing block 6 is fixedly installed on the unloading plate 2. The bottom end of the second unloading plate fixing block 6 is provided with a second unloading plate fixing block limit block 61, which cooperates with the limit block 42 provided at the top end of the unloading plate inclined slider 4 to prevent the unloading plate inclined slider 4 from sliding downward in the initial state. The top end of the second upper ejector rod 7 is fixedly installed on the upper mold base 1, and the rod body is slidably installed with the second unloading plate fixing block 6.

[0037] A limiting top plate 21 is also fixedly installed on the top of the unloading plate 2. The limiting top plate 21 is used to limit the upward sliding limit position of the unloading plate inclined slider 4, and to position the first unloading plate fixing block 5 and the second unloading plate fixing block 6 in the fixed installation position of the unloading plate 2.

[0038] The lower mold part includes a lower mold base 9, a cavity mold inclined slide block 10, a cavity mold floating block 11, a lower ejector rod 12, a first cavity mold fixing block 13, and a second cavity mold fixing block 14.

[0039] The first die fixing block 13 is fixedly mounted on the lower die base 9. The die inclined slider 10 is provided with an inclined sliding surface 101, which slides in cooperation with the first die fixing block 13. Furthermore, a vertical limiting part 102 is provided at the bottom end of the inclined sliding surface 101 to ensure that the die inclined slider 10 will not deviate obliquely upward in the initial state. The lower ejector rod 12 is vertically slidably mounted on the lower die base 9. A spring is provided at the bottom of the lower ejector rod 12 to provide an upward elastic force to the lower ejector rod 12. A limiting part 121 is provided at the bottom end of the lower ejector rod to limit the upward movement direction of the lower ejector rod 12. Through the spring, the top of the lower ejector rod acts on the die inclined slider 10. The die inclined slider 10 is provided with a negative angle bending direction facing the workpiece 8. The extrusion guide sliding surface 103 cooperates with the unloading plate inclined slider 4 during mold operation to complete the negative angle bending adjustment of the workpiece 8; the die floating block 11 is slidably disposed on the lower mold base 9, and a spring is provided at the bottom of the die floating block 11 to provide upward elastic force to the die floating block; a limiting step 111 is also provided at the bottom end of the die floating block; the second die fixing block 14 is fixedly installed on the lower mold base 9, and a limiting step 141 is provided at the bottom end to cooperate with the limiting step 111 to limit the upward distance of the die floating block 11; the second die fixing block 14 is provided with an inclined surface 142 that cooperates with the bottom of the workpiece, and cooperates with the unloading plate inclined slider 4 and the first unloading plate fixing block 5 to prevent the workpiece 8 from deforming inside during the mold unmolding process.

[0040] In this embodiment, a light load spring is used at the top of the first dome rod 3, and a medium load spring is used at the bottom of the lower dome rod 12 and the die floating block 11 to ensure that the spring force of the die floating block 11 is greater than that of the lower dome rod 12.

[0041] In this embodiment, the travel of the stripper plate 2 is 29 mm, the travel of the die lifting block 11 is 25 mm, the travel of the die inclined slide block 10 is 8 mm, the travel of the stripper plate inclined slide block 4 is 10 mm, the angle of the die inclined slide block 10 is 25°, and the angle of the stripper plate inclined slide block 4 is 8°. The first stripper plate fixing block 13 and the second stripper plate fixing block 14 are fixed with reverse screws for easy quick disassembly and adjustment.

[0042] The working process of the progressive die structure of this utility model is as follows:

[0043] Step 1, refer to Figure 1 The progressive die starts to close from the open state. The bottom of the workpiece 8 is supported by the concave die floating block 11. During the mold closing process, the upper die part moves downward and the stripper plate inclined slider 4 begins to contact the right bottom surface of the part of the workpiece 8 to be bent.

[0044] Step 2, refer to Figure 3As the upper mold continues to move downward, the stripper plate slider 4 is subjected to an upward force from the workpiece 8. Since the spring force at the bottom of the die lifting block 11 is greater than the spring force at the top of the first upper ejector 3, the spring at the top of the first upper ejector 3 is compressed, and the stripper plate slider 4 remains stationary. Meanwhile, the upper mold base 1 and the stripper plate 2 continue to move downward, causing the shaping protrusion 51 at the bottom of the first stripper plate fixing block 5 and the stripper plate slider 4 to be embedded together in the right inner position of the bent part of the workpiece 8 to form a sufficient fit and support.

[0045] Step 3, refer to Figure 4 As the upper mold continues to move downward, the stripper plate 2 moves downward to the bottom dead center position. At this time, the stripper plate 2, along with the first stripper plate fixing block 5 and the stripper plate inclined slider 4 on it, completely press the workpiece 8 onto the second die fixing block 14, thus completing the pressure positioning of the workpiece 8.

[0046] Step 4, refer to Figure 5 The upper mold base 1 continues to move downwards, driving the second upper ejector rod 7 to press down the oblique slide block 10 of the die. During this process, the spring at the bottom of the lower ejector rod 12 at the bottom of the oblique slide block 10 of the die is compressed, causing the oblique slide block 10 of the die to move obliquely downwards along the first die fixing block 13, bending and adjusting the part of the workpiece to be bent, turning the 90-degree angle into a negative angle, until the mold moves to a fully closed state. Furthermore, when the mold reaches a fully closed state, the upper mold base 1 will apply pressure to the stripper plate 2, causing the stripper plate 2 and the first stripper plate fixing block 5 and the stripper plate oblique slide block 4 on it to further press and shape the workpiece 8, so that the workpiece achieves higher precision.

[0047] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A progressive die structure for adjusting a workpiece by negative angle bending, characterized in that, Includes the upper mold part and the lower mold part: The upper mold part includes an upper mold base, a stripper plate, a first upper ejector rod, a stripper plate inclined slider, a first stripper plate fixing block, a second stripper plate fixing block, and a second upper ejector rod; The unloading plate and the upper mold base are slidably connected by a first upper ejector rod and a second upper ejector rod. The unloading plate inclined slider is slidably mounted on the unloading plate. The unloading plate is provided with a mounting groove for mounting the unloading plate inclined slider. The first upper ejector rod is slidably mounted vertically in the unloading plate and the upper mold base. An upper ejector rod limiting block is provided at the top of the first upper ejector rod to limit the downward movement direction of the first upper ejector rod. A spring is also provided at the top of the first upper ejector rod to provide a downward elastic force for the first upper ejector rod. Through the spring, the bottom of the first upper ejector rod acts on the unloading plate inclined slider. The first unloading plate fixing block and the second unloading plate fixing block are fixedly mounted on the unloading plate and slide in cooperation with the unloading plate inclined slider. The top end of the second upper ejector rod is fixedly mounted on the upper mold base, and the rod body is slidably mounted with the second unloading plate fixing block. A limiting top plate is also fixedly installed on the top of the unloading plate. The limiting top plate is used to limit the upward sliding limit position of the unloading plate inclined slider and to position the first unloading plate fixing block and the second unloading plate fixing block in the fixed installation position of the unloading plate. The lower mold part includes a lower mold base, a cavity mold inclined slide block, a cavity mold floating block, a lower ejector rod, a first cavity mold fixing block, and a second cavity mold fixing block; The first die fixing block is fixedly mounted on the lower die base, and the die inclined slider is slidably connected to the first die fixing block; the die inclined slider is provided with a guide sliding surface facing the negative angle bending direction of the workpiece; the lower ejector rod is vertically slidably mounted on the lower die base, and a limiting part is also provided at the bottom of the lower ejector rod to limit the upward cutting direction of the lower ejector rod; a spring is provided at the bottom of the lower ejector rod to provide an upward elastic force for the lower ejector rod, and through the spring, the top of the lower ejector rod acts on the die inclined slider; the die floating block is slidably mounted on the lower die base, and a spring is provided at the bottom of the die floating block to provide an upward elastic force for the die floating block; the second die fixing block is fixedly mounted on the lower die base and slidably connected to the die floating block.

2. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The unloading plate inclined slider is provided with an inclined surface, which slides in cooperation with the first unloading plate fixing block.

3. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The bottom of the first unloading plate fixing block is provided with a downward shaping protrusion. The shaping protrusion and the unloading plate inclined slider are used to ensure that the right inner position of the workpiece bending part is fully fitted and supported during the mold closing process.

4. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, A limiting block is provided at the bottom of the second unloading plate fixing block, which slides in cooperation with the limiting block provided at the top of the unloading plate inclined slider.

5. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The oblique slider of the die is provided with an oblique sliding surface on one side, and a vertical limiting part is also provided at the bottom of the oblique sliding surface to ensure that the oblique slider of the die will not shift obliquely upward in the initial state.

6. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The bottom end of the concave mold floating block is provided with a limiting step.

7. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The bottom end of the second die fixing block is provided with a limiting step that cooperates with the limiting step of the die floating block to limit the upward distance of the die floating block. The second die fixing block is also provided with an inclined surface that cooperates with the bottom of the workpiece.

8. The progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The first upper ejector uses a light load spring, while the lower ejector and the die lifting block use medium load springs.

9. A progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The ejector plate has a stroke of 29 mm, the die float block has a stroke of 25 mm, the die inclined slide block has a stroke of 8 mm, the ejector plate inclined slide block has a stroke of 10 mm, the die inclined slide block angle is 25°, and the ejector plate inclined slide block angle is 8°.

10. A progressive die structure for adjusting a workpiece by negative angle bending as described in claim 1, characterized in that, The first unloading plate fixing block and the second unloading plate fixing block are fixed with reverse screws.

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