Stamping die, stamping device and stamping processing method of workpiece

Abstract

The present invention relates to a stamping die, a stamping device and a stamping method for a workpiece. The die comprises a female die and a male die. The female die also comprises a material starting device. The material starting device comprises a side ring and a starting pendulum arranged on the female die. The starting pendulum comprises a swing arm with a connecting piece arranged at one end and a swing shaft seat with a swing shaft. The swing arm is provided with an axial hole passing through its geometric center. The swing shaft is movably connected to the axial hole. The connecting piece is movably connected to the side ring. The female die is provided with a recessed portion at the edge of its mold cavity. The side ring is arranged in the recessed portion. The present invention has a simple solution. The efficiency and quality of material starting are effectively improved by the female die material starting structure.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a stamping die, a stamping device and a stamping processing method for a workpiece. Background Art

[0002] During continuous automatic stamping, the unfinished stamped products are driven forward by the material connection points of the material belt. In continuous production, demoulding efficiency is an important factor affecting stamping efficiency and is the shortcoming of the entire production activity. In traditional operations, it is necessary to use the demoulding columns designed on the female mold to eject the mold after the female mold and the male mold are completely separated, which is inefficient. Summary of the invention

[0003] The stamping die, the stamping device and the stamping method of the workpiece of the present invention adopt a suitable die structure, thereby achieving efficient demoulding of the stamping operation during the production process.

[0004] The stamping die of the present invention comprises a female die and a male die. The female die also comprises a material starting device. The material starting device comprises a side ring and a starting pendulum arranged on the female die. The starting pendulum comprises a swing arm with a connecting piece arranged at one end and a swing shaft seat with a swing shaft. The swing arm is provided with an axial hole passing through its geometric center. The swing shaft is movably connected to the axial hole. The connecting piece is movably connected to the side ring. The female die is provided with a recessed portion at the edge of its mold cavity, and the side ring is arranged in the recessed portion.

[0005] An improvement of the stamping die of the present invention is that the geometric center of the swing arm is offset from the center of gravity.

[0006] An improvement of the stamping die of the present invention is that the center of gravity of the swing arm is far away from the die cavity of the female die compared to the geometric center.

[0007] The punching device of the present invention comprises the aforementioned punching die and a machine base for installing the punching die.

[0008] An improvement of the punching device of the present invention is that a pressure device is also arranged on the machine base, and the pressure device includes a power piston, and the power piston is connected to the other end of the swing arm.

[0009] An improvement of the punching device of the present invention is that a hinge is further provided on the power piston, and the power piston is connected to the swing arm through the hinge.

[0010] An improvement of the punching device of the present invention, the pressure device is a gas cylinder or an oil cylinder.

[0011] The punching method of the workpiece adopts a punching device and includes the following steps:

[0012] One end of the swing arm of the starting swing moves, and the edge ring returns to the concave part of the female mold;

[0013] Setting the workpiece on the female mold;

[0014] The female mold and the male mold are close to each other to achieve stamping;

[0015] The female die and the male die move away from each other, and the stamping is finished;

[0016] The other end of the swing arm of the starting swing moves, and the edge ring deviates from the concave part of the female mold, thereby realizing the demoulding of the workpiece.

[0017] An improvement of the stamping processing method of the present invention is that the movement of the swing arm of the starting swing is driven by a pressure device with a power piston.

[0018] This solution helps demoulding by the movement of the edge ring during work, so that the stamped workpiece can quickly leave the mold without the need for an additional uniform speed mold, thereby improving the efficiency of product stamping production. It has a good application effect in the large-scale rapid production of vehicle stamping parts and standard profile accessories. At this time, due to the close cooperation between the edge ring and the female mold, the demand for secondary processing and polishing of the stamped product is effectively improved. During the execution process, the seesaw effect of the swing arm can be used to quickly and efficiently realize the demoulding operation. The operation process of the swing arm can be manual or with the help of simple equipment, such as oil cylinders or air cylinders. Through the controllable movement of the piston of the air cylinder or oil cylinder within the stroke range, the action state of the edge ring can be accurately and efficiently controlled, and a balance can be achieved between high-quality demoulding and operating efficiency. There is no doubt that while simplifying the equipment, the operating efficiency and yield rate of the equipment are also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 , a schematic diagram of the working process of the scheme of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0021] like Figure 1 As shown, the stamping device may include a stamping die, the stamping die has a male die and a female die, and the male die is connected by a travel guide column, so that the male die slides away from or close to the female die along the travel guide column, and the following description is based on the example that the male die is located above the female die. The stamping die is provided with a die combination composed of a pair of mutually matching female and male dies, and the stamping die is provided with at least one die combination, so that different functions can be stamped on the raw material workpiece in the same stamping process, such as stamping shape, punching and stamping cutting, etc.

[0022] In order to improve the efficiency and quality of demoulding, the female mold is also provided with a material lifting device, which includes a side ring and a starting pendulum arranged on the female mold. The starting pendulum includes a swing arm with a connecting piece at one end and a swing shaft seat with a swing shaft. The swing arm is provided with an axial hole passing through its geometric center, the swing shaft is movably connected to the axial hole, and the connecting piece is movably connected to the side ring. The female mold is provided with a recessed portion at the edge of its mold cavity, and the side ring is arranged in the recessed portion, so that the side ring and the female mold are combined to form a complete stamping form. At this time, it is required that there is a good precision and material matching between the side ring and the female mold, and it is required that the side ring is not easy to deform during continuous operation. Before the mold is closed and stamped, the side ring is pre-reduced to the recessed portion, so as to form a complete cavity in the female mold. After the stamping is completed, the male mold is separated from the mold. At this time, the side ring forms a small movement under the action of the swing arm, and the workpiece is demoulded by using the tight pressure between the stamped workpiece and the inner wall of the side ring, thereby reducing the demand for the traditional demoulding column structure on the female mold. Preferably, the geometric center of the swing arm is offset from the center of gravity. This makes the edge ring receive the normal torque given by the swing arm when demolding. More preferably, the center of gravity of the swing arm is far away from the cavity of the female mold compared to the geometric center. At this time, it is satisfied that after the male mold and the female mold are opened, the edge ring is subjected to the eccentric force given by the swing arm, so that the stamped part has a tendency to detach. When the eccentric force given by the swing arm is large enough, demolding can also be achieved directly, but this state is generally limited to avoid affecting the stamping accuracy. For example, this idleness can be given by the material before stamping. The pressure formed by the material before stamping on the edge ring is obviously greater than the eccentric force, while the pressure formed by the workpiece formed after stamping is appropriately less than the eccentric force; of course, this limitation can also be limited by an additional pressure device. At this time, a pressure device can also be provided on the machine base, which can be a cylinder or an oil cylinder, etc. The pressure device includes a power piston, which is connected to the other end of the swing arm, so that the piston controls the movement of the other end of the swing arm within an appropriate range of travel, thereby achieving the state of controlling the connection between the swing arm and the edge ring and the movement state of the edge ring. A hinge is also provided on the power piston, and the power piston is connected to the swing arm through the hinge, so that the connection between the edge ring and the piston can rotate around the hinge.

[0023] In order to improve the stamping accuracy, a product limiting device for limiting the material is also provided. The product limiting device is slidably arranged on the male die relative to the female die. The product limiting device has a relative sliding stroke relative to the female die during the stamping process. When the male die and the female die are stamping, the product limiting device will limit the raw material workpiece on the female die or the frame adjacent to the female die, effectively preventing the raw material workpiece from shifting during stamping, thereby achieving a stable and precise stamping effect.

[0024] Specifically, in this embodiment, the product limiting device includes at least two spring bolts, which are fixedly arranged on the male die. The ends of the spring bolts are provided with elastic abutment portions, which may be springs, so as to limit the product to the female die by abutment, so that after the stamping is completed, the product limiting device is reset by the springs, so as to avoid lifting the raw material workpiece after the stamping to affect the stamping, and improve the efficiency and precision of the stamping.

[0025] In this embodiment, a pressing convex surface is provided on the female die, and the pressing convex surface cooperates with the product limiting device to clamp and fix the unpunched raw material workpiece surface, thereby improving the punching accuracy. Specifically, during punching, the male die moves toward the female die, and the product limiting device first contacts the material and then contacts the pressing surface, pressing the raw material workpiece against the female die, and then punching the raw material workpiece through the male die, thereby achieving the purpose of high-precision punching.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0027] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A stamping die, comprising a female die and a male die, characterized in that: The female mold also includes a material starting device, which includes a side ring and a starting pendulum arranged on the female mold, the starting pendulum includes a swing arm with a connecting piece arranged at one end and a swing shaft seat with a swing shaft, the swing arm is provided with an axial hole passing through its geometric center, the swing shaft is movably connected to the axial hole, the connecting piece is movably connected to the side ring, the female mold is provided with a recessed portion at the edge of its mold cavity, the side ring is arranged in the recessed portion, the geometric center of the swing arm is deviated from the center of gravity, and the center of gravity of the swing arm is far away from the mold cavity of the female mold compared to the geometric center, before the mold is closed and stamped, the side ring is pre-positioned in the recessed portion, thereby forming a complete cavity in the female mold, and after the stamping is completed, the male mold is separated from the female mold, at this time, the side ring forms a slight movement under the action of the swing arm, and the workpiece is demolded by utilizing the tight pressure between the workpiece after stamping and the inner wall of the side ring.

2. A stamping device, comprising the stamping die as described in claim 1 and a machine base for mounting the stamping die, wherein a pressure device is also provided on the machine base, wherein the pressure device comprises a power piston, wherein the power piston is connected to the other end of a swing arm, wherein a hinge is also provided on the power piston, wherein the power piston is connected to the swing arm via the hinge, and wherein the pressure device is an air cylinder or an oil cylinder.

3. A method for stamping a workpiece, using the stamping device as described in claim 2, comprising the following steps: one end of a swing arm of a starting pendulum moves, and the edge ring returns to the recessed portion of the female mold; the workpiece is set on the female mold; the female mold and the male mold approach each other to close the mold to achieve stamping; the female mold and the male mold move away from each other to end the stamping; the other end of the swing arm of the starting pendulum moves, and the edge ring deviates from the recessed portion of the female mold to achieve demolding of the workpiece, and the movement of the swing arm of the starting pendulum is driven by a pressure device with a power piston.

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