CN105834276A - High speed punching mechanism for all-electric servo press - Google Patents

Abstract

The invention discloses a high-speed stamping mechanism for an all-electric servo press, which comprises a punch, a threaded auxiliary drive, a swing frame, a spring mechanism and a spring driving device. The thread auxiliary transmission includes a nut, a screw and a driving motor; the height of the nut is fixed, and the screw can be lifted. The spring mechanism includes a spring height-limiting locking device, a swing rod and a spring; one end of the swing rod is provided with an arc-shaped chute; one end of the spring is provided with a rotating shaft that can form a sheave pair with the arc-shaped chute; the spring height-limiting locking device The top height position of the spring mechanism can be fixed and can be locked. The spring driving device can make the fork swing, and then the rotating shaft and the arc chute form a sheave pair. After adopting the above structure, the working stroke is driven by the drive motor, and the non-working stroke is driven by the spring mechanism, so that the processing efficiency can be significantly improved and the energy consumption can be reduced. Moreover, it can be applied to different plate thicknesses and changes in different stamping forces, and the output force has good linearity, and can be applied to high-speed and heavy-duty applications.

Description

A high-speed stamping mechanism for an all-electric servo press

technical field

The invention relates to a stamping device of a press, in particular to a high-speed stamping mechanism for an all-electric servo press.

Background technique

Servo press is an important equipment in the field of sheet metal processing. The existing technology adopts the planar linkage mechanism driven by a single motor or a double motor. This technical solution has a simple structure, good reliability, and is easy to control. It is widely used at present. But still there are following deficiencies:

1. The above technical solution Since the entire stroke of the punch is driven by a motor, and the entire stroke of the punch includes the working

Stroke (that is, stamping stroke, the following is similar) and non-working stroke (that is, non-pressing stroke, the following is similar), in which the working stroke is very short, and the non-working stroke is very long, and the working stroke accounts for about 1/6 of the entire stroke ~1/10, thus resulting in lower punching speed and affecting processing efficiency.

2. The linearity of punching force output is poor.

3. The adaptability to different plate thickness is poor. In order to adapt to different plate thickness changes, the stroke and motor power of the mechanism are usually increased.

Increased energy consumption.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-speed stamping mechanism for an all-electric servo press in view of the above-mentioned deficiencies in the prior art. The non-working stroke is realized by a spring mechanism, which can significantly improve the processing efficiency and reduce energy consumption. Moreover, it can be applied to different plate thicknesses and changes in different stamping forces, and the output force has good linearity, and can be applied to high-speed and heavy-duty applications.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A high-speed stamping mechanism for an all-electric servo press, including a punch, a screw drive, a swing frame, a spring mechanism, and a spring drive device; the swing frame is arranged between the screw drive and the spring mechanism, and the swing frame is connected to the punch , threaded auxiliary drive and spring mechanism are hinged.

The thread auxiliary transmission includes nut, screw, main connecting rod and driving motor; the height position of the nut is fixed, the screw and the nut are matched, and the screw can be lifted and locked in height under the action of the driving motor; one end of the main connecting rod is connected with the screw Hinged, the other end of the main link is hinged with the swing frame.

The spring mechanism includes a secondary connecting rod, a spring height-limiting locking device, a swing rod and a spring; one end of the secondary connecting rod is hinged with the swing frame, and the other end of the secondary connecting rod is respectively hinged with the spring height-limiting locking device and the swing rod; the swing rod The other end of the spring is provided with an arc-shaped chute; one end of the spring is hinged with the frame through the support rod, and the other end of the spring is provided with a rotating shaft that can form a sheave pair with the arc-shaped chute; the spring height-limiting locking device can make The top height position of the spring mechanism is fixed and lockable.

The spring driving device can make the fork swing, and then make the above-mentioned rotating shaft and the arc-shaped chute form a sheave pair.

The spring driving device is driven by a bevel gear, and the bevel gear drive includes a bevel gear 1 and a bevel gear 2 that mesh with each other.

The bevel gear drive also includes a mandrel, a synchronous belt 2 and a synchronous pulley; one end of the mandrel is fixedly connected with the swing rod, and the other end of the mandrel is connected with the bevel gear 2 through the synchronous belt pulley and the 2 synchronous belt.

The mandrel adjacent to one end of the synchronous belt 2 is also fixedly provided with a roulette, and the roulette is provided with a pin; the synchronous pulley on the side of the mandrel is provided with an arc-shaped chute 2, and the arc-shaped chute 2 can be connected with The pins on the wheel form the groove pair.

The spring height limiting locking device includes a slide block and a horizontal slide rail, the horizontal slide rail is fixedly arranged on the frame, the slide block is fixedly arranged on the top of the auxiliary connecting rod, the slide block can form a sliding pair with the horizontal slide rail, and the slide block Capable of self-locking.

The thread auxiliary transmission also includes a synchronous belt one, through which the driving motor is fitted on the outer periphery of the nut and drives the nut to rotate.

There are two or more springs in the spring mechanism, all springs are arranged parallel to each other, one end of all springs is fixed on the support rod, and the other end of all springs is fixed on the rotating shaft.

The swing frame is L-shaped, the tip corner of the swing frame is upward, and the tip corner is hinged with the top of the punch; one of the free ends of the swing frame is hinged with the main link in the threaded auxiliary transmission; The other free end is hinged with the secondary link in the spring mechanism.

The swinging frame is a V-shaped frame or a triangular frame, and the V-shaped frame or the triangular frame has three hinge points, and the three hinge points are respectively hinged with the main connecting rod, the punch and the auxiliary connecting rod.

The swing frame is a linear rod, and the linear rod is provided with two hinge points, one hinge point is hinged with the punch; the other hinge point is hinged with the main connecting rod and the auxiliary connecting rod respectively.

After the present invention adopts the above structure, it has the following beneficial effects:

1. The drive motor only provides the necessary punching force during the working stroke, while the non-working stroke is realized by the action of the spring mechanism, which is fast and energy-saving.

2. The stamping force is mainly realized by the thread pair transmission, so the stamping force is linear, which is beneficial to forming processes such as deep drawing.

3. It can adapt to the change of different plate thickness without increasing the power of the driving motor and the stroke of the mechanism.

Description of drawings

Fig. 1 has shown the structure diagram of the high-speed stamping mechanism of the all-electric servo press of the present invention.

Fig. 2 shows a side view of the high-speed stamping mechanism for the all-electric servo press of the present invention without the frame.

Fig. 3 shows a schematic diagram of the principle of the high-speed stamping mechanism used in the all-electric servo press of the present invention.

Fig. 4 shows a schematic diagram of the principle of the spring driving device of the present invention.

Fig. 5 shows a schematic structural view of the spring driving device of the present invention.

Figure 6 shows a partially enlarged schematic diagram of the threaded auxiliary drive.

Fig. 7 shows a schematic structural view of the swing rod, the mandrel and the wheel.

Figure 8 shows a schematic structural view of the spring mechanism.

Fig. 9 has shown the pin on the wheel disc and the arc-shaped chute 2 to form the structural representation of the groove wheel pair.

Figure 10 shows the schematic diagram of the initial movement when the punch is at the top dead center and moves toward the plate surface (that is, non-working stroke 1).

Fig. 11 shows a schematic diagram of the position of the pin on the wheel disc in the arc-shaped chute 2 when the non-working stroke 1 starts to move.

Figure 12 shows the schematic diagram of the punch moving from the top dead center toward the plate surface (that is, non-working stroke 1) and moving to the middle.

Fig. 13 shows a schematic diagram of the position of the pin on the wheel in the arc-shaped chute 2 when the non-working stroke 1 moves to the middle.

Figure 14 shows the schematic diagram of the mechanism movement when the punch contacts the plate and starts the punching process (ie, the working stroke).

Figure 15 shows the schematic diagram of the mechanism movement when the plate is punched and the punch is at the bottom dead center.

Fig. 16 shows the schematic diagram of the position of the pin on the wheel in the second arc chute when the punch is at the bottom dead center when the sheet is punched.

Including:

1. Rack;

2. Punch;

31. screw rod; 32. nut; 33. drive motor; 34. synchronous belt one; 35. main connecting rod;

4. Swing frame;

51. secondary connecting rod; 52. slide block; 53. pendulum; 531. arc chute one; 54. spring; 541. rotating shaft; 542. support rod; 55. small connecting rod;

61. bevel gear one; 62. bevel gear two; 63. synchronous belt two; 64. mandrel; 65. wheel disc; 651. pin; 66. synchronous pulley;

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

The entire stroke of the all-electric servo press includes a working stroke and a non-working stroke. The working stroke is very short, while the non-working stroke is very long. The working stroke accounts for about 1/6~1/10 of the entire stroke.

The above working stroke is the stamping process starting from the contact of the punch with the plate, that is, the stamping stroke.

The non-working stroke, that is, the non-punching stroke, is decomposed into non-working stroke 1 and non-working stroke 2 in this application. Among them, the non-working stroke 1 means that the punch is located at the top dead center and moves toward the plate surface. Non-working stroke 2 refers to the movement process of the punch from the bottom dead center to the top dead center, that is, the return stroke.

As shown in Figures 1 and 2, a high-speed stamping mechanism for an all-electric servo press includes a frame 1, a punch 2, a threaded auxiliary drive, a swing frame 4, a spring mechanism, and a spring drive device.

The oscillating frame is arranged between the threaded auxiliary transmission and the spring mechanism, and the oscillating frame is respectively hinged with the punch, the threaded auxiliary transmission and the spring mechanism.

The swing frame has the following three preferred embodiments.

Example 1

As shown in Figure 1, the swing frame is L-shaped, the tip corner of the swing frame faces upward, and the tip corner is hinged with the top of the punch; one of the free ends of the swing frame is hinged with the main link in the threaded auxiliary drive ; The other free end of the swing frame is hinged with the secondary connecting rod in the spring mechanism.

Example 2

The swinging frame is a V-shaped frame or a triangular frame, and the V-shaped frame or the triangular frame has three hinge points, and the three hinge points are respectively hinged with the main connecting rod, the punch and the auxiliary connecting rod.

Example 3

The swing frame is a linear rod, and the linear rod is provided with two hinge points, one hinge point is hinged with the punch; the other hinge point is hinged with the main connecting rod and the auxiliary connecting rod respectively.

As shown in FIG. 6 , the thread auxiliary transmission includes a nut 32 , a screw rod 31 , a main connecting rod 35 , a synchronous belt 1 34 and a drive motor 33 .

The height position of the nut is fixed, the screw rod cooperates with the nut, and the screw rod can be lifted and locked in height under the action of the driving motor. Preferably, a set of timing belts is set on the outer periphery of the nut.

As shown in Figure 3, the drive motor drives the nut to rotate through the synchronous belt, the nut rotates to drive the screw to move up and down, the screw moves up and down to drive the main connecting rod to move, and the swing frame (equivalent to a lever) realizes the up and down drive of the punch.

One end of the main connecting rod is hinged with the screw rod, and the other end of the main connecting rod is hinged with the swing frame.

As shown in FIG. 8 , the spring mechanism includes an auxiliary connecting rod 51 , a spring height limiting locking device, a swing rod 53 and a spring 54 .

One end of the auxiliary connecting rod, preferably the bottom end of the auxiliary connecting rod, is hinged with the swing frame, the top of the auxiliary connecting rod is hinged with the spring height limit locking device, and the top side end of the auxiliary connecting rod is connected with the swing rod through the small connecting rod 55. hinged.

The above-mentioned spring height limiting locking device can make the top height position of the spring mechanism fixed and lockable. The spring height limiting locking device preferably includes a slide block 52 and a horizontal slide rail, the horizontal slide rail is fixedly arranged on the frame, the slide block is fixedly arranged on the top of the secondary connecting rod, the slide block can form a sliding pair with the horizontal slide rail, and the slide block Capable of self-locking.

The pendulum rod is similar to a pendulum, and the top of the pendulum is hinged with the secondary connecting rod through a small connecting rod;

There can be one spring, or two or more springs, preferably two, and they are symmetrically arranged left and right. All springs are arranged parallel to each other, one end of all springs is fixed on the support rod 542 , and the other end of all springs is fixed on the rotating shaft 541 .

Both ends of the above-mentioned support rod are hinged with the frame, and the above-mentioned rotating shaft and the arc-shaped chute can form a sheave pair.

The spring driving device can make the fork swing, and then make the above-mentioned rotating shaft and the arc-shaped chute form a sheave pair.

As shown in Fig. 4 and Fig. 5, the spring driving device is preferably driven by a bevel gear, but as an alternative, it can also be a driving device with other structures.

The bevel gear drive comprises a bevel gear 1 61 , a bevel gear 2 62 , a synchronous belt 2 63 , a mandrel 64 , a wheel disc 65 and a synchronous pulley 65 which mesh with each other.

The first bevel gear is fixedly fitted on the outer periphery of the screw rod, and is rigidly connected with the parallel screw rod; the second bevel gear drives the swing of the pendulum.

After one end of the mandrel is fixedly connected with the swing rod, it is hinged with the frame; the other end of the mandrel is connected with the second bevel gear through the synchronous pulley and the second synchronous belt.

As shown in Figure 7, a roulette is fixedly arranged on the mandrel adjacent to one end of the synchronous belt 2, and a pin 651 is arranged on the roulette; an arc-shaped chute 2 661 is provided on the synchronous pulley at the side of the mandrel, This arc chute two can form the sheave pair as shown in Figure 9 with the pin on the wheel disc.

The working principle of the high-speed stamping mechanism for the all-electric servo press of the present invention is as follows.

1. When the non-working stroke is 1, the spring mechanism moves

As shown in Figure 10, when the punching machine is in the non-working stroke 1, the punch is at the top dead center, the height from the plate surface is h0, and the arc-shaped chute 2 and the pin are in the positions shown in Figure 11. The drive motor drives the nut and the bevel gear to rotate at ω ₀ through the synchronous belt, the screw moves downward at the speed of V ₁ , and the punch moves downward at the speed of V ₀ . The bevel gear 1 meshes with the bevel gear 2, and the bevel gear ₂ rotates at a speed of ω ₁ . speed rotation. Arc chute 2 and pin form a sheave pair, and the rotation of bevel gear 2 drives the fork to rotate with ω ₂ . The sharp angle θ between the spring and the swing rod decreases gradually.

As the punch moves downward, as shown in Figure 12, the height from the plate surface is h1, and the height of the punch from the plate surface gradually decreases.

During the downward movement of the punch, the arc-shaped chute 2 and the pin are in the positions shown in Figure 13; the rotating shaft slides from point A to point B to point C, and the swing rod rotates, and there is a critical point between the swing rod and the spring, and the critical point At the point, the spring and the pendulum are collinear. After the critical point passes, the rotating shaft will slide to point C at high speed. At this time, the movement of the slider is completely driven by the spring force. Before the critical point, the movement of the slider is mainly driven by the thread pair, and the spring Institutions are ineffective.

The sharp angle θ between the spring and the pendulum gradually decreases. When the height of the punch from the plate surface decreases to 0, the rotating shaft at the upper end of the spring slides along the arc-shaped chute at a speed of V ₅ (that is, by A ——B——C point), the pendulum rotates at an accelerated speed of ω ₃ , the slider moves quickly to the left at a speed of V ₄ , and the punch moves at an accelerated speed of V ₆ . At this time, V ₆ is mainly driven by the spring force, which is significantly higher than the speed V ₀ driven by the drive motor. It is a fast movement of non-working stroke 1 until the punch contacts the plate.

2. Working stroke, driving motor function

As shown in Figure 14, under the action of the spring mechanism, the punch quickly moves downward and touches the plate. At this time, the press α between the slider and the upper horizontal guide rail is relatively small, which can form self-locking. That is, under the action of punching force, the slider will not move to the left, regardless of the size of the punching force. When the working stroke starts, the spring mechanism on the right side forms a self-locking mechanism, and the stamping is realized by the screw drive on the left side.

As shown in Figure 15, after the plate is punched, the punching force disappears instantaneously, the driving motor stops rotating, and the left screw stops moving. The right side spring mechanism continues to move under the effect of the spring force until the arc-shaped chute two contacts the pin at the position shown in Figure 16 to play a position-limiting role and reach the bottom dead point.

Non-working stroke 2, the movement of the punch from the bottom dead center to the upward dead center is opposite to the above-mentioned movement process, and the principle is the same, so no detailed description is given here.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be carried out to the technical solutions of the present invention. These equivalent transformations All belong to the protection scope of the present invention.

Claims (10)

1. A high-speed stamping mechanism for an all-electric servo press, characterized in that: comprise a punch, a threaded auxiliary transmission, a swing frame, a spring mechanism and a spring drive device; the swing frame is arranged between the threaded secondary transmission and the spring mechanism, and The swing frame is respectively hinged with the punch, the threaded auxiliary drive and the spring mechanism; The thread auxiliary transmission includes nut, screw, main connecting rod and driving motor; the height position of the nut is fixed, the screw and the nut are matched, and the screw can be lifted and locked in height under the action of the driving motor; one end of the main connecting rod is connected with the screw Hinged, the other end of the main link is hinged with the swing frame; The spring mechanism includes a secondary connecting rod, a spring height-limiting locking device, a swing rod and a spring; one end of the secondary connecting rod is hinged with the swing frame, and the other end of the secondary connecting rod is respectively hinged with the spring height-limiting locking device and the swing rod; the swing rod The other end of the spring is provided with an arc-shaped chute; one end of the spring is hinged with the frame through the support rod, and the other end of the spring is provided with a rotating shaft that can form a sheave pair with the arc-shaped chute; the spring height-limiting locking device can make The top height of the spring mechanism is fixed and can be locked; The spring driving device can make the fork swing, and then make the above-mentioned rotating shaft and the arc-shaped chute form a sheave pair. 2. The high-speed stamping mechanism for an all-electric servo press according to claim 1, characterized in that: the spring driving device is driven by a bevel gear, and the bevel gear drive includes bevel gear one and bevel gear two meshing with each other, and the bevel gear One is fixedly sleeved on the outer periphery of the screw rod, and the second bevel gear drives the swing of the swing rod. 3. The high-speed stamping mechanism for an all-electric servo press according to claim 2, wherein the bevel gear drive also includes a mandrel, a synchronous belt 2 and a synchronous pulley; one end of the mandrel is fixedly connected to the swing rod, and the core The other end of the shaft is connected with the second bevel gear through the synchronous pulley and the second synchronous belt. 4. The high-speed stamping mechanism for an all-electric servo press according to claim 3, characterized in that: a roulette is fixedly arranged on the mandrel adjacent to one end of the timing belt 2, and a pin is arranged on the roulette; The synchronous belt pulley on the shaft side is provided with an arc-shaped chute two, and the arc-shaped chute two can form a sheave pair with the pin on the wheel disc. 5. The high-speed stamping mechanism for an all-electric servo press according to claim 1, characterized in that: the spring height-limiting locking device includes a slider and a horizontal slide rail, the horizontal slide rail is fixedly arranged on the frame, and the slider Fixedly arranged on the top of the auxiliary connecting rod, the slider can form a sliding pair with the horizontal slide rail, and the slider can be self-locking. 6. The high-speed stamping mechanism for an all-electric servo press according to claim 1, characterized in that: the threaded auxiliary transmission also includes a synchronous belt, and the drive motor is set on the outer periphery of the nut through a synchronous belt, and drives the nut to rotate . 7. The high-speed stamping mechanism for an all-electric servo press according to claim 1, characterized in that: there are two or more springs in the spring mechanism, all springs are arranged parallel to each other, and one end of all springs is fixed on On the support rod, the other ends of all springs are fixed on the rotating shaft. 8. The high-speed stamping mechanism for an all-electric servo press according to claim 1, characterized in that: the swing frame is L-shaped, the tip corner of the swing frame faces upward, and the tip corner is hinged to the top of the punch ; One of the free ends of the swing frame is hinged with the main link in the threaded secondary transmission; the other free end of the swing frame is hinged with the secondary link in the spring mechanism. 9. The high-speed stamping mechanism for an all-electric servo press according to claim 1, characterized in that: the swing frame is a V-shaped frame or a triangular frame, and the V-shaped frame or triangular frame has three hinge points. The two hinge points are respectively hinged with the main connecting rod, the punch and the auxiliary connecting rod. 10. The high-speed stamping mechanism for an all-electric servo press according to claim 1, wherein the swing frame is a linear rod, and the linear rod is provided with two hinge points, and one hinge point is hinged to the punch ; The other hinge point is hinged with the main connecting rod and the auxiliary connecting rod respectively.