Punching device for sheet metal machining

Abstract

The utility model discloses a punching device for sheet metal working, which relates to the field of punching dies and comprises a lower die with a convex inner cavity inside, a fixing flange is integrally formed on the lower portion of the periphery of the lower die, a replacement part is detachably connected to the upper portion of the inner cavity of the lower die, limiting blocks protruding outwards are formed on the periphery of the replacement part at equal intervals, and the limiting blocks are connected with the fixing flange. An accommodating groove for accommodating the replacement part and the limiting block is formed in the upper part of the inner cavity of the lower die; an ejection mechanism is arranged in the lower die and used for rapidly ejecting the replacement part which is seriously abraded out of the containing groove. And the bottom end of the replacement part is provided with a screw hole which is sunken upwards. According to the punching die, by arranging the replacement part, the part of the punching die can be independently replaced, the replacement cost is relatively low, and meanwhile the problem that the replacement part is not easy to take out due to the fact that the friction force between the replacement part and the containing groove is too large can be solved through cooperation with the ejection mechanism.

Description

Technical Field

[0001] The utility model relates to the field of punching dies, in particular to a punching device for sheet metal processing. Background Art

[0002] The core of the punching device is the punching head and the punching die. The punching head moves downward driven by the power device and cooperates with the punching die to punch the sheet metal.

[0003] In the prior art, the punched sheet metal waste will come into contact with the narrow part of the inner cavity of the punching die during its downward movement. After long-term use, the narrow part of the inner cavity of the punching die will be severely deformed, which will lead to an increase in burrs after punching. Even more seriously, after the sheet metal is punched, the inner circumference of the punched hole will be severely deformed. In the prior art, the entire lower punching die needs to be replaced, which is costly. Utility Model Content

[0004] The purpose of the utility model is to provide a punching device for sheet metal processing in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a punching device for sheet metal processing, comprising a lower die having a "convex" shaped inner cavity, a fixing flange is integrally formed on the lower periphery of the lower die, a replacement part is detachably connected to the upper part of the inner cavity of the lower die, and the outer periphery of the replacement part is equidistantly formed with outwardly protruding limit blocks, and a receiving groove for receiving the replacement part and the limit block is provided on the upper part of the inner cavity of the lower die;

[0006] An ejection mechanism is provided inside the lower die, and the ejection mechanism is used to quickly eject the severely worn replacement part out of the receiving groove;

[0007] A screw hole recessed upward is provided at the bottom end of the replacement part, a round hole aligned with the screw hole is provided inside the lower mold, and a locking bolt passes through the round hole and is threadedly connected with the screw hole.

[0008] As a further solution of the utility model: the ejection mechanism includes a lifting groove opened inside the lower mold, the inner wall of the lifting groove is slidably connected to a lifting plate, the top of the inner edge of the lifting plate is formed with an upwardly protruding pressure plate, and the top of the lifting plate is located between the outer side of the pressure plate and the top of the inner wall of the lifting groove and is fixedly connected with a spring.

[0009] As a further solution of the utility model: the ejection mechanism also includes a bottom column integrally formed with the bottom of the lifting plate, the bottom column penetrates into the wide opening groove of the lower mold cavity, and the bottom end of the bottom column is integrally formed with a limiting plate.

[0010] As a further solution of the utility model: the base columns and the locking bolts are arranged alternately.

[0011] As a further solution of the utility model: the number of the springs is multiple, and the multiple springs are equidistantly distributed in the circumferential direction on the top of the lifting plate.

[0012] As a further solution of the utility model: the outer peripheral edge of the pressing plate is aligned with the circular inner peripheral edge of the accommodating groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. By setting replacement parts, parts of the punching die can be replaced separately, and the replacement cost is relatively low. At the same time, with the ejection mechanism, the problem of excessive friction between the replacement parts and the receiving groove, which makes it difficult to remove the replacement parts, can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle part;

[0018] Figure 4 This is a schematic diagram of the internal structure of the utility model from another perspective.

[0019] In the figure: 1. lower die; 2. fixing flange; 3. replacement parts; 4. limit block; 5. lifting plate; 6. bottom column; 7. locking bolt; 8. pressure plate; 9. spring; 10. limit plate; 11. lifting slot. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] See also Figure 1 to Figure 4In an embodiment of the utility model, a punching device for sheet metal processing includes a lower die 1 with a "convex" shaped inner cavity, a fixing flange 2 is integrally formed on the lower periphery of the lower die 1, a replacement part 3 is detachably connected to the upper part of the inner cavity of the lower die 1, and the outer periphery of the replacement part 3 is equidistantly formed with outwardly protruding limit blocks 4, and an accommodating groove for accommodating the replacement part 3 and the limit blocks 4 is provided on the upper part of the inner cavity of the lower die 1; an ejection mechanism is provided inside the lower die 1, and the ejection mechanism is used to quickly eject the severely worn replacement part 3 from the accommodating groove; an upwardly concave screw hole is provided at the bottom end of the replacement part 3, and a round hole aligned with the screw hole is provided inside the lower die 1, and a locking bolt 7 passes through the round hole and is threadedly connected to the screw hole.

[0022] In this embodiment: the lower die 1 cooperates with the punching head to perform a punching operation on the sheet metal. During the punching process, the punched sheet metal waste will rub against the inner wall of the replacement part 3. After long-term use, the inner periphery of the replacement part 3 will be deformed, which will lead to an increase in burrs after punching. More seriously, after the sheet metal is punched, the inner periphery of the punched hole will be severely deformed. At this time, a tool (such as a wrench) is used to dock with the end of the locking bolt 7, and the wrench is turned, and the locking bolt 7 is unscrewed by the wrench;

[0023] Then use a columnar object, the outer circumference of the columnar object should roughly match the wide diameter of the inner cavity of the lower mold 1, and then put the lower mold 1 on the top of the columnar object, and apply a downward force to the lower mold 1. The columnar object remains stationary, so the moving lower mold 1 will apply a reaction force to the ejection mechanism, thereby ejecting the replacement part 3, and the new replacement part 3 can be replaced.

[0024] Please refer to Figure 2 , Figure 3 and Figure 4 The ejection mechanism includes a lifting groove 11 opened inside the lower mold 1, and the inner wall of the lifting groove 11 is slidably connected with a lifting plate 5 up and down. The top of the inner edge of the lifting plate 5 is formed with an upwardly protruding pressing plate 8, and the top of the lifting plate 5 is located between the outer side of the pressing plate 8 and the top of the inner wall of the lifting groove 11 and is fixedly connected with a spring 9. The ejection mechanism also includes a bottom column 6 integrally formed with the bottom of the lifting plate 5, and the bottom column 6 penetrates into the wide opening groove of the inner cavity of the lower mold 1, and the bottom end of the bottom column 6 is integrally formed with a limiting plate 10.

[0025] In this embodiment: when the lower mold 1 drives the ejection mechanism to contact the top of the columnar object, when the bottom of the limiting plate 10 contacts the top of the columnar object, the limiting plate 10 has no downward movement space, and the lower mold 1 can still continue to move downward, the limiting plate 10 moves upward relative to the lower mold 1, the limiting plate 10 pushes the bottom column 6 to cause the lifting plate 5 to move upward relative to the lifting slot 11, and the lifting plate 5 therefore pushes the pressing plate 8 to move upward, and the pressing plate 8 moving upward applies pressure to the bottom of the replacement part 3 moving synchronously with the lower mold 1, so that the replacement part 3 is ejected from the receiving slot, and then the new replacement part 3 can be installed;

[0026] When installing a new replacement part 3, it is necessary to align the limit block 4 with the corresponding hole slot on the receiving slot to ensure that the round hole and the screw hole are aligned in the up and down direction.

[0027] Please refer to Figure 4 , the bottom column 6 and the locking bolt 7 are arranged alternately.

[0028] In this embodiment: the bottom column 6 and the limiting plate 10 at the bottom thereof are prevented from interfering with the locking bolt 7 during the up and down movement.

[0029] Please refer to Figure 2 and Figure 3 There are multiple springs 9, and the multiple springs 9 are evenly distributed in the circumferential direction on the top of the lifting plate 5.

[0030] In this embodiment, the spring 9 can assist the lifting plate 5 in resetting. When the friction between the replacement part 3 and the receiving groove is not large, the resetting of the spring 9 can push the replacement part 3 to reset.

[0031] Please refer to Figure 3 The outer peripheral edge of the pressing plate 8 is aligned with the circular inner peripheral edge of the accommodating groove.

[0032] In this embodiment: when the pressing plate 8 moves upward, the pressing plate 8 can enter the receiving groove and push out the replacement part 3.

[0033] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A punching device for sheet metal processing, comprising a lower die (1) having a convex inner cavity, wherein a fixing flange (2) is integrally formed on the lower periphery of the lower die (1), characterized in that: A replacement part (3) is detachably connected to the upper part of the inner cavity of the lower mold (1); the outer circumference of the replacement part (3) is equidistantly formed with outwardly protruding limit blocks (4); and a receiving groove for receiving the replacement part (3) and the limit blocks (4) is provided in the upper part of the inner cavity of the lower mold (1); An ejection mechanism is provided inside the lower die (1), and the ejection mechanism is used to quickly eject the severely worn replacement part (3) out of the receiving groove; The bottom end of the replacement part (3) is provided with an upwardly recessed screw hole, the interior of the lower mold (1) is provided with a circular hole aligned with the screw hole, and a locking bolt (7) passes through the circular hole and is threadedly connected with the screw hole.

2. A punching device for sheet metal processing according to claim 1, characterized in that: The ejection mechanism comprises a lifting groove (11) provided inside the lower mold (1); the inner wall of the lifting groove (11) is slidably connected to a lifting plate (5) up and down; the top of the inner edge of the lifting plate (5) is formed with a pressing plate (8) protruding upward; and the top of the lifting plate (5) is located between the outer side of the pressing plate (8) and the top of the inner wall of the lifting groove (11) and is fixedly connected with a spring (9).

3. A punching device for sheet metal processing according to claim 2, characterized in that: The ejection mechanism further comprises a bottom column (6) integrally formed with the bottom of the lifting plate (5), the bottom column (6) extending through a wide opening groove in the inner cavity of the lower mold (1), and a limiting plate (10) integrally formed at the bottom end of the bottom column (6).

4. A punching device for sheet metal processing according to claim 3, characterized in that: The base columns (6) and the locking bolts (7) are arranged alternately.

5. A punching device for sheet metal processing according to claim 4, characterized in that: The number of the springs (9) is multiple, and the multiple springs (9) are evenly distributed in the circumferential direction on the top of the lifting plate (5).

6. A punching device for sheet metal processing according to claim 5, characterized in that: The outer peripheral edge of the pressing plate (8) is aligned with the circular inner peripheral edge of the accommodating groove.

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