Stamping die for side shaping and trimming of rocker arm housing after shaping

Abstract

The present invention discloses a stamping die for side shaping and trimming of a rocker arm housing after sizing, which has high cutting accuracy and low manufacturing cost. The stamping die includes an upper die base and a lower die base. An installation groove is provided on the lower die base. A floating seat is arranged in the installation groove through a plurality of nitrogen gas springs. An upper material supporting block is arranged on the floating seat. A middle shaping block is detachably arranged on the upper material supporting block. Positioning blocks are respectively and detachably arranged on both sides of the middle shaping block on the upper material supporting block. A positioning pin matched with a positioning hole on the workpiece is arranged on the positioning block. Trimming knife blocks are respectively and detachably arranged on both the left and right sides of the upper material supporting block in the installation groove. The trimming knife block includes a short-end knife block, a middle knife block and a long-end knife block. Limit blocks for limiting the upper limit of the movement of the floating seat are respectively arranged at both ends of the floating seat on the lower die base. An upper die groove is provided on the upper die base. An upper shaping and trimming block group is arranged in the upper die groove. Avoidance holes for avoiding a pair of positioning pins are arranged on the upper shaping and trimming block group. A pair of elastic blank holding pins penetrating through the upper shaping and trimming block group are arranged on the upper die base.

Description

Technical Field

[0001] The present invention relates to a stamping die for side shaping and trimming of a rocker arm housing after sizing. Background Art

[0002] After the rocker arm housing is sized, side shaping and trimming can prevent the edges of the workpiece from curling or cracking during subsequent processing, thereby ensuring the quality of the workpiece. However, since the surplus materials on both sides have been cut after the initial forming of the workpiece, the trimming surplus materials are relatively narrow, which makes the surplus materials prone to deformation or even cracking during the trimming process, and requires high requirements for the stamping die. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a stamping die for side shaping and trimming of a rocker arm housing after sizing, which has high trimming accuracy and low manufacturing cost.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is: a stamping die for side shaping and trimming of a rocker arm housing after sizing, including an upper die base and a lower die base. An installation groove is provided on the lower die base. A lifting seat is provided in the installation groove through a plurality of nitrogen springs. An upper supporting block is provided on the lifting seat. A middle shaping block is detachably provided on the upper supporting block. Positioning blocks are detachably provided on both sides of the middle shaping block on the upper supporting block. Positioning pins matching the positioning holes on the workpiece are provided on the positioning blocks. Trimming knife blocks are detachably provided on both the left and right sides of the upper supporting block in the installation groove. The trimming knife block includes a short-end knife block, a middle knife block, and a long-end knife block. Limit blocks for restricting the upper limit of the movement of the lifting seat are respectively provided at both ends of the lifting seat on the lower die base. An installation gap is provided between the groove wall of the installation groove corresponding to the end of the trimming knife block and the trimming knife block. A filling block for filling the installation gap is provided in the installation gap. An upper die groove is provided on the upper die base. An upper shaping and trimming block group is provided in the upper die groove. Avoidance holes for avoiding a pair of positioning pins are provided on the upper shaping and trimming block group. A pair of elastic pressure pins passing through the upper shaping and trimming block group are provided on the upper die base. A plurality of filling blocks for filling the installation gap are provided on both adjacent sides of the upper shaping and trimming block group in the upper die groove. A pair of die closing guide plates are respectively provided on both sides of the upper die base. A matching guide groove is provided on the lower die base. The dividing line between the short-end knife block and the middle knife block is perpendicular to the tangent plane of the material to be cut at that place; the dividing line between the long-end knife block and the middle knife block is perpendicular to the tangent plane of the material to be cut at that place.

[0005] As a preferred solution, an arc-shaped inner groove is provided at the corner connection of the installation groove of the lower die base corresponding to the trimming knife block.

[0006] As a preferred solution, nitrogen springs are respectively provided at the four corners of the lower die base.

[0007] As a preferred solution, two pairs of urethane rubber blocks for restricting the position of the upper die during die closing are detachably provided on the lower die base.

[0008] The beneficial effects of the present invention are as follows:

[0009] The cooperation between the die closing guide plates on both sides of the upper die base and the guide grooves on the lower die base ensures the smooth downward movement of the upper die. The workpiece is first pressed by the lifting seat and the elastic pressure pins to avoid workpiece jumping, so that the stamping accuracy can be better controlled. Moreover, limit blocks for restricting the upper limit of the movement of the lifting seat are respectively arranged at both ends of the lifting seat on the lower die base to prevent excessive movement of the lifting seat. The trimming blade block includes a short-end blade block, a middle blade block, and a long-end blade block, which not only facilitates processing and installation but also allows the size of the blade block to be set according to needs, reducing the consumption of special steel and lowering the mold cost. Since there is an installation gap between the groove wall of the installation groove corresponding to the end of the trimming blade block and the trimming blade block, and a filling block for filling the installation gap is arranged in the installation gap, and several filling blocks for filling the installation gap are arranged on the adjacent sides of the upper shaping and trimming block group in the upper die groove, it is convenient to install each blade block and the upper shaping and trimming block group while forming a support for the blade block and the upper shaping and trimming block group, ensuring uniform force on the blade block and the upper shaping and trimming block group during the stamping process, thereby ensuring the cutting effect and avoiding damage to the upper shaping and trimming block group, and ensuring the service life of the mold. Since the middle shaping block is detachably arranged on the upper material supporting block, and positioning blocks are respectively detachably arranged on both sides of the middle shaping block on the upper material supporting block, and the middle shaping block and the positioning blocks need to be made of special steel, this structure reduces the mold manufacturing cost.

[0010] Since the dividing line between the short-end blade block and the middle blade block is perpendicular to the tangent plane of the material to be cut at that place; the dividing line between the long-end blade block and the middle blade block is perpendicular to the tangent plane of the material to be cut at that place, effective support is obtained for the cutting edges of each blade block during punching, avoiding cracking of the cutting edges.

[0011] Since the installation groove of the lower die base is provided with an arc-shaped inner groove corresponding to the corner connection of the trimming blade block, it facilitates the installation of the trimming blade block and reduces the processing difficulty of the installation groove.

[0012] Since nitrogen springs are respectively arranged at the four corners of the lower die base to counteract the downward pressure of the upper die, it avoids the problem of insufficient space when all are arranged under the lifting seat, saves installation space, increases the workpiece forming pressure, and makes the later springback deformation of the workpiece smaller.

[0013] Since two pairs of urethane rubber blocks for restricting the position of the upper die during die closing are detachably arranged on the lower die base, it ensures the die closing accuracy and makes the upper die base not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the lower die structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the upper die structure of the present invention.

[0016] Figures 1 to 2In the figure: 1 upper die base, 2 lower die base, 3 nitrogen spring, 4 urethane rubber block, 5 lifter seat, 6 upper stock supporting block, 7 middle sizing block, 8 positioning block, 9 positioning pin, 10 trimming blade block, 11 limiting block, 12 filling block; 13 upper sizing and trimming block group, 14 elastic pressure pin, 15 die closing guide plate. Specific implementation manner

[0017] The following combines with the attached drawings to describe in detail the specific implementation scheme of the present invention.

[0018] As Figures 1 - 2 shown, the stamping die for side sizing and trimming after the rocker arm housing is shaped includes an upper die base 1 and a lower die base 2. Nitrogen springs 3 are respectively arranged at the four corners of the lower die base 2. Two pairs of urethane rubber blocks 4 for restricting the position of the upper die during die closing are detachably arranged on the lower die base 2.

[0019] An installation groove is provided on the lower die base 2. A lifter seat 5 is arranged in the installation groove through several nitrogen springs 3. An upper stock supporting block 6 is arranged on the lifter seat 5. A middle sizing block 7 is detachably arranged on the upper stock supporting block 6. Positioning blocks 8 are respectively detachably arranged on both sides of the middle sizing block 7 on the upper stock supporting block 6. A positioning pin 9 that cooperates with the positioning hole on the workpiece is arranged on the positioning block 8. Trimming blade blocks 10 are respectively detachably arranged on the left and right sides of the upper stock supporting block 6 in the installation groove. The trimming blade block 10 includes a short-end blade block, a middle blade block, and a long-end blade block; the dividing line between the short-end blade block and the middle blade block is perpendicular to the tangent plane of the material to be cut at that place; the dividing line between the long-end blade block and the middle blade block is perpendicular to the tangent plane of the material to be cut at that place.

[0020] Limiting blocks 11 for restricting the upper limit of the movement of the lifter seat 5 are respectively arranged at both ends of the lifter seat 5 on the lower die base 2; an installation gap is provided between the groove wall of the installation groove corresponding to the end of the trimming blade block 10 and the trimming blade block 10, and a filling block 12 for filling the installation gap is arranged in the installation gap; an arc-shaped inner groove is provided at the corner connection of the installation groove of the lower die base 2 corresponding to the trimming blade block 10. An upper die groove is provided on the upper die base 1. An upper sizing and trimming block group 13 is arranged in the upper die groove. Avoidance holes for avoiding a pair of positioning pins 9 are arranged on the upper sizing and trimming block group 13. A pair of elastic pressure pins 14 passing through the upper sizing and trimming block group 13 are arranged on the upper die base 1. Several filling blocks 12 for filling the installation gap are arranged on both sides of the upper sizing and trimming block group 13 in the upper die groove. A pair of die closing guide plates 15 are respectively arranged on both sides of the upper die base 1. A matching guide groove is provided on the lower die base 2.

[0021] The above embodiments only illustratively explain the principle and efficacy of the present invention and some applied embodiments, rather than being used to limit the present invention; it should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A stamping die for side shaping and trimming of a rocker arm housing after sizing, comprising an upper die base and a lower die base. An installation groove is provided on the lower die base, and a lifting seat is provided in the installation groove through a plurality of nitrogen springs. An upper material supporting block is provided on the lifting seat, and it is characterized in that: The upper material supporting block is detachably provided with a middle shaping block. On both sides of the middle shaping block on the upper material supporting block, positioning blocks are respectively detachably provided. The positioning blocks are provided with positioning pins that cooperate with the positioning holes on the workpiece. On the left and right sides of the upper material supporting block in the installation groove, trimming blade blocks are respectively detachably provided. The trimming blade blocks include short-end blade blocks, middle blade blocks, and long-end blade blocks; on the lower die base, limit blocks for restricting the upper limit of the movement of the lifting seat are respectively provided at both ends of the lifting seat; an installation gap is provided between the groove wall of the installation groove corresponding to the end of the trimming blade block and the trimming blade block, and a filling block for filling the installation gap is provided in the installation gap; on the upper die base, an upper die groove is provided. An upper shaping and trimming block group is provided in the upper die groove. Avoidance holes for avoiding a pair of positioning pins are provided on the upper shaping and trimming block group. A pair of elastic pressure pins passing through the upper shaping and trimming block group are provided on the upper die base. A number of filling blocks for filling the installation gap are provided on the adjacent sides of the upper shaping and trimming block group in the upper die groove. The boundary line between the short-end blade block and the middle blade block is perpendicular to the tangent plane of the material to be cut at this place; the boundary line between the long-end blade block and the middle blade block is perpendicular to the tangent plane of the material to be cut at this place.

2. The stamping die for side shaping and trimming of the rocker arm housing after shaping, characterized in that: The installation groove of the lower die base is provided with an arc-shaped inner groove corresponding to the corner connection of the trimming blade block.

3. The stamping die for side shaping and trimming of the rocker arm housing after sizing, as claimed in claim 2, wherein: Nitrogen springs are respectively provided at the four corners of the lower die base.

4. The stamping die for side shaping and trimming of the rocker arm housing after shaping, as described in any one of claims 1-3, is characterized in that: Two pairs of urethane rubber blocks for restricting the position of the upper die during die closing are detachably provided on the lower die base.

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