CN216937907U - Lever punch press - Google Patents

Abstract

The utility model discloses a lever punching machine, which comprises a lower die holder and an upper die holder, wherein a driving structure is arranged on the lower die holder, a punching table is arranged on the top surface of the lower die holder, a punching structure positioned above the punching table is arranged on the upper die holder, and the driving structure is connected with the punching structure through a transmission structure; the transmission structure comprises a crankshaft and a connecting rod; the punching structure comprises a lever and a punch, a rotating shaft penetrating through the lever is further arranged on the upper die base, the lever is located above the connecting rod and can rotate, and the punch and the connecting rod are connected with the two ends of the lever respectively. The lever punch press replaces a flywheel with a lever, the lever is driven to rotate through the crankshaft, when punching pressure needs to be increased, the rotating radius of the lever is increased, the rotating radius of the crankshaft is correspondingly increased, the rotating speed of the lever cannot be slowed down, and production efficiency is effectively guaranteed. The lever punch press is only increased in length, the width and the height of the lever punch press do not need to be increased, the increase of the whole weight is far smaller than that of the existing punch press, and the phenomenon of superelevation is avoided even if the height of the lever punch press does not need to be increased.

Description

a lever press

technical field

The utility model belongs to the technical field of punching machines, in particular to a lever punching machine.

Background technique

Punching machine is a punching press. Compared with traditional machining, the punching process saves materials and energy, has high efficiency, does not require high technical requirements for operators, and can make products that cannot be achieved by machining through various mold applications. , so it is more and more widely used.

The design principle of the existing punch press is to convert circular motion into linear motion, the flywheel is driven by the main motor, and is driven by the crankshaft to achieve the linear motion of the slider, and the crankshaft in the flywheel rotates once to complete an up and down motion, that is, a stamping is completed. Between the connecting rod and the slider, there needs to be a transition point for circular motion and linear motion. There are roughly two mechanisms in its design, one is a ball type, and the other is a pin type (cylindrical type). Converted to linear motion of the slider. The punch presses the material to plastically deform it to obtain the required shape and precision. Therefore, it must cooperate with a set of molds (the upper mold and the lower mold), place the material in between, and apply pressure by the machine to deform it. , The reaction force caused by the force applied to the material during processing is absorbed by the punching machine body.

The existing punch has the following defects: when increasing the punching pressure, the method adopted in the prior art is to increase the diameter of the flywheel, but after the diameter of the flywheel is increased, its rotational speed is reduced, and the frequency of punching is also decreased, so the production efficiency is affected. impact; and in order to accommodate the increase in flywheel diameter, the size of the existing punch also needs to be increased, resulting in an increase in overall weight.

Utility model content

The purpose of the utility model is to provide a lever punch, which solves the problem of increasing the punching pressure by increasing the diameter of the flywheel in the existing punch.

In order to achieve the above object, the utility model adopts the following technical solutions:

A lever punching machine comprises a lower die seat and an upper die seat, a driving structure is arranged on the lower die seat, a punching table is arranged on the top surface of the lower die seat, and a punching structure located above the punching table is arranged on the upper die seat, which drives the The structure is connected to the stamping structure through the transmission structure;

The transmission structure includes a crankshaft connected with the output end of the driving structure and a connecting rod connected with the crankshaft; the stamping structure includes a lever connected with the connecting rod and a punch arranged on the lever, and the upper die seat is also provided with a lever which is penetrated on the lever The rotating shaft, wherein the lever is located above the connecting rod and can be rotated around the rotating shaft.

In a possible design, the driving structure includes a motor, a reduction box and a transmission belt connected in sequence, one end of the transmission belt is wound around the output end of the reduction box, and the other end of the transmission belt is wound around the crankshaft.

In a possible design, the punch includes a punch body fixed on the lever and a punching slider located under the punch body, wherein a sleeve is provided on the upper die seat, and the punching slider is penetrated in the sleeve , The punching slider is also provided with a return spring, and the upper and lower ends of the punching slider extend to the outside of the sleeve.

In one possible design, the punch body is provided as a punch or roller.

In a possible design, the rotating shaft passes through the middle of the lever, and the punch body and the connecting rod are respectively connected to the two ends of the lever; or, the connecting rod and the rotating shaft are respectively located at the two ends of the lever, and the punch body is fixed on the lever and located at the two ends of the lever. between the connecting rod and the shaft.

In a possible design, there are two punching slide blocks from bottom to top, the top end of the punching slide block located above is provided with a first pressing plate adapted to the punch body, and the lower end of the punching slide block located below A second pressing plate is provided above the punching table.

In a possible design, the upper die base includes two side plates and a top plate, the lower ends of the two side plates are respectively fixed on the lower die base, and the upper ends of the two side plates are connected through the top plate; correspondingly, the punching table is fixed on the lower die base on and between the side panels.

In a possible design, the lower die base, the side plate and the top plate are integrally formed, and the top plate is provided with a groove body for the lever to pass through.

Beneficial effects:

The lever press replaces the flywheel with a lever, and drives the lever to rotate through the crankshaft. When the stamping pressure needs to be increased, the rotation radius of the lever is increased, and the rotation radius of the crankshaft is correspondingly increased, and the rotation speed of the lever will not be slowed down, effectively ensuring production efficiency. At the same time, based on the lever principle, the input force can be amplified and output as stamping pressure, which reduces the driving force requirement for the output of the driving structure, and achieves the effect of saving labor.

For the machine tool as a whole, the lever punch only increases in length, and does not need to increase in width and height. The increase in overall weight is much smaller than that of the existing punch, and the difficulty in maintenance and handling is limited, making it easy to use. There is no need to increase the height and avoid the phenomenon of super high, which ensures the scope of use and improves the practicability.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of scope.

Figure 1 is a schematic side view of the structure of a lever punch when the punch is pressed down.

Figure 2 is a schematic side view of the structure of a lever punch when the punch moves up.

Figure 3 is a schematic front view of a lever punch when the punch moves upward.

FIG. 4 is a schematic view of the front structure of a lever punch when the punch is pressed down.

FIG. 5 is a schematic side view of a lever punch when the rotating shaft is located at the end of the lever.

In the picture:

1. Lower die base; 101. Stamping table; 102. Sleeve; 2. Upper die base; 21. Side plate; 22. Top plate; 4, transmission structure; 41, crankshaft; 42, connecting rod; 5, stamping structure; 51, lever; 52, punch; 521, punch body; 522, stamping slider.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. .

Example:

As shown in Figures 1-5, a lever punch includes a lower die base 1 and an upper die base 2, the lower die base 1 is provided with a driving structure 3, and the top surface of the lower die base 1 is provided with a punching table 101, The upper die base 2 is provided with a punching structure 5 located above the punching table 101, and the driving structure 3 is connected to the punching structure 5 through the transmission structure 4; The connecting rod 42; the stamping structure 5 includes a lever 51 connected with the connecting rod 42 and a punch 52 arranged on the lever 51, and the upper die base 2 is also provided with a rotating shaft 201 which is arranged on the lever 51, wherein the lever 51 is located in The upper part of the connecting rod 42 can rotate with the shaft 201 as the center; the punch 52 and the connecting rod 42 are respectively connected to two ends of the lever 51 .

The structure of the lever punch is improved, the lever 51 is used instead of the flywheel, and the transmission route is improved, and the crankshaft 41 drives the lever 51 to rotate instead of the flywheel in the prior art. Then, when the stamping pressure needs to be increased, the rotation radius of the lever 51 is increased, and the rotation radius of the crankshaft 41 is correspondingly increased, and the rotation speed of the lever 51 is not slowed down, which effectively ensures the production efficiency. At the same time, based on the principle of lever 51, the input force can be amplified and output as stamping pressure, which reduces the requirement for the driving force output by the driving structure 3, and achieves the effect of saving labor.

For the machine tool as a whole, the lever punch only increases in length, and does not need to increase in width and height. The increase in overall weight is much smaller than that of the existing punch, and the difficulty in maintenance and handling is limited, making it easy to use. There is no need to increase the height and avoid the phenomenon of super high, which ensures the scope of use and improves the practicability.

When working, the driving structure 3 is activated, the driving structure 3 drives the crankshaft 41 to rotate, and the connecting rod 42 connected to the crankshaft 41 moves up and down under the driving of the crankshaft 41; The lower part oscillates back and forth with the rotating shaft 201 as the center, and the punch 52 moves up and down with the lever 51 .

Further, referring to FIGS. 1-2 , the rotating shaft 201 passes through the middle of the lever 51 , and the punch 52 and the connecting rod 42 are respectively connected to both ends of the lever 51 , so the upward and downward moving directions of the connecting rod 42 and the punch 52 are opposite to each other.

Or, referring to FIG. 5 , the connecting rod 42 and the rotating shaft 201 are located at the two ends of the lever 51 respectively, the punch 52 is fixed on the lever 51 and is located between the connecting rod 42 and the rotating shaft 201, then the connecting rod 42 and the punch 52 move up and down same direction.

The crankshaft 41 rotates once, the connecting rod 42 moves up and down once, the lever 51 completes a reciprocating swing, the punch 52 also moves up and down once, that is, a punch is completed, and the above process is repeated, and the crankshaft 41 is driven by the drive structure 3 to continue. Turn and complete multiple punches. The stamping die and the product to be processed are placed on the stamping table 101, and the punch 52 reciprocates up and down to complete the stamping of the product to be processed.

The structure of this lever punch is further explained below:

In this embodiment, the driving structure 3 includes a motor 31 , a reduction box 32 and a transmission belt 33 connected in sequence. One end of the transmission belt 33 is wound around the output end of the reduction box 32 , and the other end of the transmission belt 33 is wound around the crankshaft 41 .

When working, the staff controls the start and stop of the motor 31 to control whether the lever press works. Then, after the motor 31 is started, the driving force is transmitted to the crankshaft 41 through the motor 31, the reduction box 32 and the transmission belt 33, and the crankshaft 41 starts to rotate and drives the connecting rod 42 to move up and down. After the motor 31 is stopped, the reduction box 32, the transmission belt 33, the crankshaft 41, etc. all stop gradually.

Based on this, the control of the drive structure 3 is flexible, and a manual switch or an electric switch can be used, and the choice is made according to the actual use situation; similarly, the motor 31 and the reduction box 32 can also be selected from any suitable commercially available models, which are flexible and convenient to use. , good practicality.

The structure of the punch 52 is improved. Specifically, the punch 52 includes a punch body 521 fixed on the lever 51 and a punching slider 522 located below the punch body 521, wherein the upper die seat 2 is provided with a sleeve In the barrel 102 , the punching sliding block 522 is inserted into the sleeve 102 , the punching sliding block 522 is also provided with a return spring, and the upper and lower ends of the punching sliding block 522 both extend to the outside of the sleeve 102 .

Based on the above design, the punch 52 is split, the length of the punch body 521 moving along the arc is reduced, and it is closer to vertical up and down movement, and the movement of the punching slider 522 is in the vertical direction, so that , to ensure that the force applied to the product to be processed is perpendicular to the product to be processed, that is, the stamping in the vertical direction, which ensures the precision of the machine and the quality of the product, and also avoids the horizontal direction of the product to be processed and the stamping die. impact on.

During stamping, the stamping die and the product to be processed are placed on the stamping table 101 and located below the stamping slider 522. The punch body 521 is fixed on the lever 51 and moves up and down with the swing of the lever 51, and the punch body 521 is downward. The punching sliding block 522 is moved and hit, and the punching sliding block 522 moves downward under the action of the impact, thereby punching the product to be processed. The punching block 522 is reset by a return spring after punching, so that the next punching can be performed after the impact of the punch body 521 .

In a possible implementation manner, the punch body 521 is configured as a punch rod or a roller. Specifically, when a punch is selected for the punch body 521, that is, any suitable specification is selected from the existing models, which helps to reduce costs. When the punch body 521 uses a roller, that is, the punch body 521 is configured in a circular shape, and when the punch body 521 presses the punching slider 522, there is rolling friction between the two, and the friction force is smaller and the wear is smaller. .

The connecting rod 42 is connected to the end of the lever 51, but the positions of the rotating shaft 201 and the punch body 521 have various setting forms, as follows:

In a possible implementation, referring to FIG. 1 to FIG. 2 , the rotating shaft 201 passes through the middle of the lever 51 , and the punch body 521 and the connecting rod 42 are respectively connected to both ends of the lever 51 .

In another possible implementation, referring to FIG. 5 , the connecting rod 42 and the rotating shaft 201 are located at two ends of the lever 51 respectively, and the punch body 521 is fixed on the lever 51 and is located between the connecting rod 42 and the rotating shaft 201 .

Based on the above design, the punch body 521 exerts pressure on the punching slider 522 to change the arc movement into vertical up and down movement, so as to ensure vertical punching of the die, so as to improve the precision of the machine and the quality of the product. Moreover, the user can select according to the actual production conditions, which is not limited by the present invention. Accordingly, the position of the punching table 101 is also moved accordingly.

Optionally, as shown in FIGS. 1-2 , two punching slide blocks 522 are provided from bottom to top, and the top of the punching slide block 522 located above is provided with a first pressing plate adapted to the punch body 521 , located at the top of the punching slide block 522 . The lower end of the lower punching sliding block 522 is provided with a second pressing plate located above the punching table 101 . It is easy to understand that the length of the sleeve 102 can be appropriately increased to increase the number of the punching sliders 522 , and the moving distance of the punching sliders 522 can be flexibly adjusted by using the idea of modularization.

In this embodiment, the upper die base 2 includes two side plates 21 and a top plate 22, the lower ends of the two side plates 21 are respectively fixed on the lower die base 1, and the upper ends of the two side plates 21 are connected through the top plate 22; The table 101 is fixed on the lower die base 1 and is located between the two side plates 21 . Based on this, the weight of the upper die base 2 is effectively reduced, the weight of the whole machine is reduced, and maintenance and handling are facilitated.

In a possible implementation, the lower die base 1, the side plate 21 and the top plate 22 are integrally formed; in this way, the application of the integral forming process improves performance, reduces failure rate, and effectively improves service life.

In a possible implementation manner, the top plate 22 is provided with a groove body through which the lever 51 reciprocates. That is, the situation where the top plate 22 interferes with the movement of the connecting rod 42 is avoided, the completion of stamping is ensured, and the collision damage between the top plate 22 and the connecting rod 42 is avoided.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. A lever punch, characterized in that it comprises a lower die holder (1) and an upper die holder (2), the lower die holder (1) is provided with a drive structure (3), and the top surface of the lower die holder (1) A punching table (101) is arranged on the upper die base (2), a punching structure (5) located above the punching table (101) is arranged on the upper die base (2), and the driving structure (3) is connected to the punching structure (5) through the transmission structure (4); The transmission structure (4) comprises a crankshaft (41) connected with the output end of the driving structure (3) and a connecting rod (42) connected with the crankshaft (41); the stamping structure (5) comprises a lever connected with the connecting rod (42) (51) and a punch (52) arranged on the lever (51), the upper die holder (2) is also provided with a rotating shaft (201) arranged on the lever (51), wherein the lever (51) is located in the connecting The rod (42) is above and can be rotated around the shaft (201). 2. The lever punch press according to claim 1, characterized in that the drive structure (3) comprises a motor (31), a reduction box (32) and a transmission belt (33) connected in sequence, and one end of the transmission belt (33) is wound around the reduction gear. At the output end of the box (32), the other end of the transmission belt (33) is wound around the crankshaft (41). 3. The lever punch press according to claim 1, wherein the punch (52) comprises a punch body (521) fixed on the lever (51) and a punching slider (521) located below the punch body (521). 522), wherein the upper die base (2) is provided with a sleeve (102), the punching slider (522) is penetrated in the sleeve (102), and the punching slider (522) is also provided with a return spring, and The upper and lower ends of the punching sliding block (522) both extend to the outside of the sleeve (102). 4. The lever punch press according to claim 3, characterized in that, the punch body (521) is configured as a punch rod or a roller. 5. The lever punch press according to claim 3 or 4, characterized in that the shaft (201) passes through the middle of the lever (51), and the punch body (521) and the connecting rod (42) are respectively connected to the lever (51) Or, the connecting rod (42) and the rotating shaft (201) are located at the two ends of the lever (51) respectively, and the punch body (521) is fixed on the lever (51) and is located on the connecting rod (42) and the rotating shaft (201) between. 6. The lever punch press according to claim 3, characterized in that there are two punching slide blocks (522) from bottom to top, and the top of the punching slide block (522) located above is provided with a punch body (521) For the corresponding first pressing plate, the lower end of the punching slider (522) located below is provided with a second pressing plate located above the punching table (101). 7. The lever punch press according to claim 1, wherein the upper die base (2) comprises two side plates (21) and a top plate (22), and the lower ends of the two side plates (21) are respectively fixed on the lower die base On (1), the upper ends of the two side plates (21) are connected by the top plate (22); correspondingly, the punching table (101) is fixed on the lower die base (1) and is located between the two side plates (21). 8. The lever punch press according to claim 7, characterized in that the lower die base (1), the side plate (21) and the top plate (22) are integrally formed, and the top plate (22) is provided with a reciprocating lever (51) through the groove.

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