Ejection device for movable male die

Abstract

The utility model discloses an ejection device for a movable male die, which belongs to the technical field of stamping dies and comprises a die holder positioned below the movable male die, a guide column is mounted on the die holder, a fixing part is mounted at the lower end of the guide column, a spring is sleeved on the guide column, the lower end of the spring is connected with the fixing part, and the movable male die is fixed on the guide column. The upper end of the spring can abut against the movable male die, the fixing piece comprises a vertical screw rod installed at the lower end of the guide column, a through hole is formed in the die base, the end, away from the guide column, of the vertical screw rod can stretch out of the lower end of the through hole, a nut capable of abutting against the lower end face of the die base is installed on the vertical screw rod, and the upper end of the nut can abut against the lower end face of the die base. A limiting pressing plate is installed at the connecting position of the vertical screw rod and the guide column, the limiting pressing plate can press the end, away from the movable male die body, of the spring on the die holder, and the die can work in the dust environment, reduces the production cost and is convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to an ejection device for a movable punch. Background Art

[0002] In existing stamping dies, the ejection device for the movable punch typically uses a nitrogen cylinder. However, nitrogen cylinders are expensive and require proper dust protection during use. Dusty working conditions increase friction between the sleeves and wear the sealing sleeve, leading to nitrogen leakage and cylinder failure.

[0003] Since the movable punch has a long stroke, a nitrogen cylinder or spring with a long working stroke is also required to reset it. The existing spring with a long stroke usually bends outward in the middle section when pressed by the movable punch. Repeated bending will cause irreversible deformation of the spring, affecting its own working stroke, so that the movable punch cannot be ejected into place, which indirectly affects the processing quality of the product.

[0004] In addition, a spring and a nitrogen cylinder are used as the lifting device of the movable punch. In order to achieve effective ejection of the movable punch, the lower ends of the spring and the nitrogen cylinder need to be fixed to prevent them from moving horizontally. Since the spring and the nitrogen cylinder are both wearing parts during the production process, the inconvenience of disassembly and replacement will reduce work efficiency.

[0005] In view of the problems existing in the above-mentioned prior art, the present invention designs and manufactures an ejection device for a movable punch to overcome the above-mentioned defects. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the utility model provides an ejection device for a movable punch, which can work in a dusty environment, reduce production costs, and facilitate disassembly and replacement.

[0007] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: an ejection device for a movable punch, comprising a die base located below the movable punch, a guide column mounted on the die base, a fixing piece mounted on the lower end of the guide column, a spring sleeved on the guide column, the lower end of the spring connected to the fixing piece, and the upper end of the spring capable of resting on the movable punch;

[0008] The fixing member includes a vertical screw mounted on the lower end of the guide column, a through hole is provided on the mold base, an end of the vertical screw away from the guide column can extend from the lower end of the through hole, a nut that can abut against the lower end surface of the mold base is installed on the vertical screw, and a limited pressure plate is installed at the connection between the vertical screw and the guide column;

[0009] When the nut is pressed against the die base, the limiting pressure plate can press the end of the spring away from the movable punch onto the die base to prevent the spring from separating from the guide column.

[0010] Preferably, two ends of the spring are respectively provided with two turns of end coils parallel to the mold base, and the limiting pressure plate can be inserted between the end coils and the spring to press the end coils tightly against the mold base.

[0011] Preferably, the axes of the vertical screw and the guide column coincide with each other.

[0012] Preferably, the guide column and the spring are clearance-fitted.

[0013] Preferably, a circular groove is provided on one side of the mold base close to the movable punch, the circular groove coincides with the axis of the through hole, the diameter of the circular groove is the same as the outer diameter of the spring, and the lower end of the spring can be placed in the circular groove.

[0014] Preferably, one end of the limiting pressure plate away from the guiding column can abut against the inner wall of the circular groove.

[0015] Preferably, the lower end surface of the limiting pressure plate is provided with an anti-slip pad, and a side of the anti-slip pad away from the limiting pressure plate can contact the spring.

[0016] Preferably, the limiting pressure plate is detachably mounted on the guide column.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The utility model sets the spring sleeve on the guide column and installs a fixing component on the guide column to avoid the outward bending of the middle section of the spring, extend the service life of the spring, avoid the displacement of the spring, ensure the normal reset of the movable punch, low cost, easy to disassemble and replace, and can work in a dusty environment for a long time.

[0019] 2. The utility model provides a circular groove on the die base and a pressure plate on the guide column. The pressure plate presses on the end coil of the spring to prevent the spring from detaching from the guide column. The pressure plate rests on the inner wall of the circular groove to prevent the guide column from shaking, making the installation of the guide column more reliable.

[0020] 3. The utility model installs a pressure plate on the guide column, and installs a vertical screw and nut on the pressure plate, thereby realizing the detachable installation of the large guide and the spring, facilitating later repair and replacement, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a partial cross-sectional view of an ejection device for a movable punch according to the present invention;

[0022] Figure 2This is an assembly diagram of a spring and a guide column for an ejection device of a movable punch according to the utility model.

[0023] In the figure: 1-spring, 2-guide column, 3-end coil, 4-die base, 5-circular groove, 6-nut, 7-vertical screw, 8-through hole, 9-pressing plate. DETAILED DESCRIPTION

[0024] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-2 The illustrated ejection device for a movable punch comprises a die base 4 positioned below the movable punch. A guide post 2 is mounted on the die base 4, with a fixing member attached to the lower end of the guide post 2. A spring 1 is sleeved over the guide post 2. The clearance fit between the guide post 2 and the spring 1 prevents irreversible deformation of the spring 1, extending its service life and reducing production costs. The device also operates in dusty working conditions, broadening its applicability.

[0026] Specifically, the upper end of the spring 1 can rest on the movable punch, and the lower end of the spring 1 is connected to the fixing piece. The guide column 2 and the fixing piece are simultaneously limited, which can prevent the spring 1 from being displaced during elastic deformation, so that the point of action of the spring 1 on the movable punch remains unchanged, thereby ensuring the qualified rate of the parts.

[0027] The fixing member of the present invention includes a vertical screw rod 7 mounted on the lower end of the guide column 2. The axis of the vertical screw rod 7 and the guide column 2 coincide with each other. The mold base 4 is provided with a through hole 8. The end of the vertical screw rod 7 away from the guide column 2 can extend from the lower end of the through hole 8. The vertical screw rod 7 is mounted with a nut 6 that can abut against the lower end surface of the mold base 4.

[0028] The utility model is provided with a limit pressure plate 9 at the connection between the vertical screw 7 and the guide column 2. The limit pressure plate 9 is detachably mounted on the guide column 2, which is convenient for removing it separately. The two ends of the spring 1 are respectively provided with two turns of end coils 3 parallel to the die base 4. The limit pressure plate 9 can be inserted between the end coils 3 and the spring 1.

[0029] Specifically, tighten the nut 6 to press the end coil 3 against the die base 4. The nut 6 cooperates with the vertical screw 7 to detachably install the guide column 2 on the die base 4, making it easy to disassemble and replace the guide column 2.

[0030] Specifically, the lower end surface of the limiting pressure plate 9 has an anti-slip pad. When the nut 6 is pressed tightly against the die base 4, the side of the anti-slip pad away from the limiting pressure plate 9 contacts the end coil 3, pressing it tightly against the die base 4. While fixing the guide column 2, the lower end of the spring 1 can also be fixed to prevent the spring 1 from popping out from the guide column 2 after being compressed, affecting the resetting of the movable punch.

[0031] A circular groove 5 is provided on one side of the mold base 4 close to the movable punch of the present invention. The circular groove 5 coincides with the axis of the through hole 8. The diameter of the circular groove 5 is the same as the outer diameter of the spring 1. The lower end of the spring 1 can be placed in the circular groove 5. The end of the limiting pressure plate 9 away from the guide column 2 can be against the inner wall of the circular groove 5, which prevents the spring 1 from separating from the guide column 2 and also prevents the guide column 2 from shaking.

[0032] It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention. In addition, it should be understood that after reading the technical content of the present invention, those skilled in the art may make various changes, modifications and / or variations to the present invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims of this application.

Claims

1. A ejection device for a movable punch, characterized in that: It comprises a die base (4) located below the movable punch, a guide column (2) is installed on the die base (4), a fixing piece is installed at the lower end of the guide column (2), a spring (1) is sleeved on the guide column (2), the lower end of the spring (1) is connected to the fixing piece, and the upper end of the spring (1) can be against the movable punch; The fixing member includes a vertical screw (7) mounted on the lower end of the guide column (2), a through hole (8) is provided on the mold base (4), and one end of the vertical screw (7) away from the guide column (2) can extend from the lower end of the through hole (8), and a nut (6) capable of supporting the lower end surface of the mold base (4) is installed on the vertical screw (7), and a limiting pressure plate (9) is installed at the connection between the vertical screw (7) and the guide column (2); When the nut (6) is pressed against the die base (4), the limiting pressure plate (9) can press the end of the spring (1) away from the movable punch onto the die base (4), thereby preventing the spring (1) from separating from the guide column (2).

2. The ejection device for a movable punch according to claim 1, characterized in that: Two ends of the spring (1) are respectively provided with two turns of end coils (3) parallel to the die base (4); the limiting pressure plate (9) can be inserted between the end coils (3) and the spring (1) to press the end coils (3) tightly against the die base (4).

3. The ejection device for a movable punch according to claim 1, characterized in that: The axis of the vertical screw (7) and the guide column (2) coincide with each other.

4. The ejection device for a movable punch according to claim 1, characterized in that: The guide column (2) and the spring (1) are clearance-fitted.

5. The ejection device for a movable punch according to claim 1, characterized in that: A circular groove (5) is provided on one side of the mold base (4) close to the movable punch. The circular groove (5) coincides with the axis of the through hole (8). The diameter of the circular groove (5) is the same as the outer diameter of the spring (1). The lower end of the spring (1) can be placed in the circular groove (5).

6. The ejection device for a movable punch according to claim 5, characterized in that: One end of the limiting pressure plate (9) away from the guiding column (2) can abut against the inner wall of the circular groove (5).

7. The ejection device for a movable punch according to claim 1, characterized in that: The lower end surface of the limiting pressure plate (9) is provided with an anti-slip pad, and a side of the anti-slip pad away from the limiting pressure plate (9) can contact the spring (1).

8. The ejection device for a movable punch according to claim 1, characterized in that: The limiting pressure plate (9) is detachably mounted on the guide column (2).

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