CN205949593U - Double -slider dynamic balance mechanism - Google Patents

Abstract

The utility model discloses a double-slider dynamic balance mechanism, which is characterized in that: a horizontal inertia force balance mechanism includes a crankshaft, a connecting rod, and a slider; a vertical dynamic balance mechanism includes a slider, a toggle and a dynamic balance mechanism. Slider: It can realize the mutual cancellation of the horizontal inertia force and the balance of the vertical inertia force, and overcome the drift problem of the bottom dead center of the high-speed precision punching machine after the speed is increased, and improve the accuracy of the bottom dead center.

Description

A dual-slider dynamic balance mechanism

Technical field

The utility model relates to a double-slider dynamic balance mechanism, which can realize the mutual cancellation of the inertial force in the horizontal direction and the balance of the inertial force in the vertical direction, and overcome the drift problem of the bottom dead point of the high-speed precision punch after the speed is increased, and improve the bottom dead point. point precision.

Background technique

For high-speed presses, high bottom dead point accuracy is required. The bottom dead point of traditional high-speed presses mostly uses a crank slider mechanism, and the bottom dead point of the slider cannot be adjusted dynamically, which directly affects the quality of stamping parts and the life of the mold. Due to the high speed of the high-speed press, a balancing device must be used. The traditional crank press can only be balanced in the vertical direction, and the inertial force in the horizontal direction cannot be well eliminated. For the crank press, changing the stroke requires replacing parts such as the crankshaft, which is time-consuming and labor-intensive. Due to the small stroke of the high-speed press, generally within 50mm, when the mold needs to be overhauled, the mold must be taken out for overhaul due to insufficient space. The common method is to increase the slider lifting device, which is realized by increasing the hydraulic cylinder to lift the upper beam as a whole, which increases the failure point.

For high-speed punching machines, its performance depends directly on its parameter structure, design accuracy, manufacturing and installation accuracy, etc., while the accuracy of the bottom dead center is a direct reflection of its comprehensive performance. Production practice shows that effectively controlling the accuracy of the bottom dead center and reducing the drift of the bottom dead center will have a very positive effect on the improvement of forging processing precision.

Utility model content

Purpose of the utility model: The utility model provides a high-speed precision punch mechanism, which can effectively reduce the drift problem of the upper dead point and the lower dead point; and the horizontal inertia force of the driving mechanism can cancel each other out; in addition, the dynamic balance device of the mechanism can balance The momentum generated by the punching slide and the upper mold of the mold when they move up and down during the stamping operation and the allowable loading capacity of the upper mold are configured to improve the dynamic balance.

Technical solution: A double-slider dynamic balance mechanism is designed, including a frame, a crank, a connecting rod, a slider, a guide post connecting rod, a toggle and a dynamic balance slider, and the mechanism is a symmetrical structure. The crank is hinged on the frame through the hinge point; the connecting rod, the connecting rod of the guide post and the toggle rod are hinged on the slider. The inertial force balance mechanism in the horizontal direction and the dynamic balance mechanism in the vertical direction. Symmetrical crank-slider mechanism and symmetrical balance linkage mechanism and symmetrical linkage mechanism rely on the symmetrical crank-link mechanism for 360° rotation, driving the left and right symmetrical sliders to reciprocate left and right, and then using the two sliders The movement drives the symmetrical pendulum to swing, thereby driving the guide post 6 to reciprocate up and down to form a stamping stroke. Connect the symmetrical link mechanism with the two slider mechanisms so that the inertial force in the horizontal direction is automatically offset, and the vertical inertial force balance is achieved by relying on the dynamic balance counterweight mechanism in the vertical direction. Dead center drift problem.

Beneficial effects: while realizing the motion transmission, the mutual cancellation of the inertial forces in the horizontal direction and the balance of the inertial forces in the vertical direction are realized, and the problem of drifting of the bottom dead center of the high-speed precision punching machine after the speed is increased is overcome, and the accuracy of the bottom dead point is improved.

Description of drawings

Fig. 1 is a schematic diagram of the present invention

Among the figure 1. frame, 2. crank, 3. connecting rod, 4. slide block, 5. guide post connecting rod, 6. guide post, 7. toggle lever, 8. dynamic balance slide block.

Due to the symmetry of the mechanism, symmetrical parts are not described separately

detailed description

In Fig. 1, the crank 2 is hinged on the frame 1 through the hinge point O, and the crank 2 is driven by the servo motor to rotate, the crank 2 and the connecting rod 3, the slider 4, and the crank 2 and the connecting rod 3', the slider 4' A symmetrical crank-slider mechanism is formed respectively, and the movement of the connecting rod 3 and the connecting rod 3' drives the slider 4 and the slider 4' to reciprocate left and right in the frame 1. Because the crank-slider mechanism adopts a symmetrical mechanism, the dead point problem of the crank-slider mechanism can be avoided, and at the same time, the inertial forces of the symmetrical crank-slider mechanism cancel each other in the horizontal direction.

Slide block 4, guide post connecting rod 5 and slide block 4', guide post connecting rod 5' form symmetrical double slider mechanism with guide post 6 respectively. The slider 4 and the slider 4' respectively drive the guide post connecting rod 5 and the guide post connecting rod 5' to rotate, thereby realizing the up and down reciprocating movement of the guide post 6 under the constraint of the guide rail of the fuselage 1, and the connecting rod is connected with the guide post, In this way, the left and right configurations of the guide pillars can be kept unchanged, resulting in changes in the upper and lower dimensions, thereby forming a stamping stroke.

Slider 4, guide post connecting rod 5 and toggle 7 are hinged at point H, slider 4', guide post connecting rod 5' and toggle 7' are hinged at point H', and slider 4 and slider 4' drive the elbow The rod 7 and the toggle lever 7' rotate, and the other ends of the toggle lever 7 and the toggle lever 7' are connected by the dynamic balance slider 8 and the dynamic balance slider 8', forming a symmetrical dynamic balance mechanism. The rotation of the toggle lever 7 and the toggle lever 7' drives the dynamic balance slider 8 and the dynamic balance slider 8' to reciprocate up and down. Moreover, the balance mechanism can make the inertial force in the vertical direction well adjusted during stamping work, and can reduce the drift of the bottom dead center of the guide post 6 during the stamping process.

Claims (3)

1. a kind of double-slider dynamic balance mechanism, including frame (1), crank (2), connecting rod (3), slide block (4), guide pillar connecting rod (5), Toggle link (7) and dynamic equilibrium slide block (8), mechanism is symmetrical structure, and described crank (2) is hinged in frame (1) by pin joint； Described connecting rod (3), guide pillar connecting rod (5) and toggle link (7) are articulated with slide block (4)；Described toggle link (7) and dynamic equilibrium slide block (8) It is connected, guide pillar connecting rod (5) is connected with guide pillar (6), and crank (2) is connected with connecting rod (3).

2. double-slider dynamic balance mechanism according to claim 1 it is characterised in that：Horizontal direction balance of shaking force mechanism Including crank (2), connecting rod (3), connecting rod (3 '), slide block (4) and slide block (4 ').

3. double-slider dynamic balance mechanism according to claim 1 it is characterised in that：Vertical direction dynamic balance mechanism bag Include slide block (4), toggle link (7), toggle link (7 ') and dynamic equilibrium slide block (8), dynamic equilibrium slide block (8 ').