CN2215985Y

CN2215985Y - Stamping Machinery Flexible Secondary Stamping Mechanism

Info

Publication number: CN2215985Y
Application number: CN 95201947
Authority: CN
Inventors: 纪金怀
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-24
Filing date: 1995-01-24
Publication date: 1995-12-27
Anticipated expiration: 2005-01-24

Abstract

A flexible two-degree punching mechanism for punching machine is composed of a connecting rod consisting of upper and lower segments pivoted to a triangular pivot block, a slide block pivoted to a crankshaft and driven by said crankshaft, and a pre-stressed first-degree punching unit for shaping the slide block of lower segment of said connecting rod and the second-degree punching unit for shaping the workpiece.

Description

Flexible secondary ram press mechanism for ram press

The utility model relates to a kind of punching mechanism, particularly relates to a kind of flexible two degree punching mechanisms of press that increase finished product precision, attenuating mechanical shock and impact noise, prolong die life.

The working time of stamping machine was a stroke in the past, and the feeding time of material is short, so the speed height of producing is applicable to a large amount of productions, as automobile and airplane parts, extraordinary five metals, toy and kitchen utensils etc.The stamping machine plus-pressure is on workpiece, and it is molded that it is subjected to, and the driving mechanism of stamping machine was based on bent axle in the past, and as shown in Figure 1, it is a kind of action schematic diagram of stamping machine in the past.This stamping machine is a driving mechanism with bent axle 1, with slide block 2 is that punching pin impacts working substance, rotating band movable slider 2 actions by bent axle 1, the action of this slide block 2 is similar to simple harmonic motion, begin accelerated motion when descending, speed maximum midway, slow down then and stop, the work of punching press, just the place carries out in the middle of stroke, just when maximal rate, carry out, workpiece is produced maximum pressure, and as shown in Figure 3, it is the rotate a circle displacement diagram of slide block 2 of the bent axle 1 of stamping machine in the past, this bent axle 1 rotates a circle, and slide block 2 impacts workpiece once.

But, metal is after the bend by pressure distortion, still keep former resilient some, as shown in Figure 2, so after punching pin (slide block 2) moves apart working substance 3, working substance 3 has the elasticity restitution, this effect is called elasticity bounce-back (springback) effect, this effect is decided on the character of working substance, and the flexibility of working substance is bigger, and the elasticity rebound effect is just bigger, so working substance 3 will produce instability, uneven situation, reduce finished product precision, and mechanical shock is big with impact noise, the reduction die life.

The purpose of this utility model is to provide a kind of press flexible two degree punching mechanisms, lower instability, uneven situation that working substance is produced because of the elasticity rebound effect, increase finished product accuracy, and lower mechanical shock and impact noise, prolong die life.

The flexible two degree punching mechanisms of press of the present utility model, this punching mechanism has a connecting rod, this connecting rod is divided into upper and lower two sections, one end of connecting rod epimere and punch table articulate, one end of hypomere articulates a slide block, and upper and lower section of this connecting rod articulates with a pivot joint block respectively, and this pivot joint block and a bent axle are affixed, and drive this pivot joint block by this bent axle, make slide block two degree of connecting rod hypomere impact working substances.

Below by most preferred embodiment and accompanying drawing the flexible two degree punching mechanisms of press of the present utility model are elaborated, in the accompanying drawing:

Fig. 1 is the action schematic diagram of stamping machine in the past.

Fig. 2 is the schematic diagram of metallic elastic rebound effect.

Fig. 3 is one week of crankshaft rotating of stamping machine in the past, the displacement diagram of slide block.

Fig. 4 is the action schematic diagram of the utility model preferred embodiment.

Fig. 5 is the schematic diagram that the utility model preferred embodiment first degree impacts.

Fig. 6 is the schematic diagram that the utility model preferred embodiment second degree impacts.

Fig. 7 is one week of crankshaft rotating of the utility model preferred embodiment, the displacement diagram of slide block.

As shown in Figure 4, the flexible two degree punching mechanisms of the press of the utility model preferred embodiment have a connecting rod 10, this connecting rod 10 is divided into epimere 11 and hypomere 12, epimere 11 upper ends are articulated on the board 20, the lower end articulates a leg-of-mutton pivot joint block 30, the upper end of the hypomere 12 of this connecting rod 10 is articulated in this pivot joint block 30, the lower end articulates a slide block 40, this pivot joint block 30 has three pivoting points that lay respectively at three corners, on aforementioned and connecting rod 10, hypomere 11, outside 12 pivot joints, the 3rd pivoting point is articulated on the bent axle 50, and, make pivot joint block 30 front and back drawing actions, with 10 actions of pulling connecting rod along with bent axle 50 rotations drive, make connecting rod 10 hypomere 12 on the affixed slide block 40, following action, and impact working substance.

As shown in Figure 5, this pivot joint block 30 is driven by bent axle 50 rotation and drawing backward, when the epimere 11 of connecting rod 10 during perpendicular to working substance 60, slide block 40 first degree of connecting rod 10 hypomeres 12 impact working substance 60, make working substance 60 produce flexural deformation, this is first section impact, just gives 60 1 pre-power moulding of working substance.

When above-mentioned first degree impacts, working substance 60 can produce some spring return effects, as shown in Figure 6, it is the schematic diagram that slide block 40 second degree impact working substance 60, after slide block 40 first degree impact working substance 60, bent axle 50 still is rotated further, pivot joint block 30 continues drawing connecting rod 10, on connecting rod 10,

hypomere

11,12 in line and vertical working substance 60, and slide block 40 second degree impact working substances 60, after this second degree impacts the moment that is next to the first degree impact, the elasticity of this working substance 60 is recovered to be pushed back by the pressure that second degree impacts, this moment slide block 40 the speed maximum, pressure also is maximum, impact working substance 60 by slide block 40, with working substance 60 typings.

When slide block 40 first degree impact working substance 60, though working substance 60 is because of elasticity bounce-back (springback) effect, recover and produce elasticity, but, the second degree impact that is come one after another at once pushes back, and the first pre-power typing impacted of degree, the distortion that working substance 60 is produced to a certain degree, second degree with big pressure impacts and then with working substance 60 typings.

As shown in Figure 7, it is that bent axle 50 of the present utility model rotates a circle, the displacement diagram of slide block 40, by curve map two peak values are arranged as can be known, be respectively first of 40 pairs of working substances 60 of slide block, two degree impact, the differential seat angle of two peak values is about 10 °, just after first degree impacted, bent axle 50 rotated 10 ° with regard to two degree impact working substances 60, so, the utility model is (10 ° of bent axle 50 rotations) at short notice, successively do the first pre-power moulding of degree and the second degree punch forming, can lower the instability that working substance is produced because of the elasticity rebound effect, inhomogeneous situation is to increase finished product precision, and lower mechanical shock and impact noise, and prolong die life.

In sum, the flexible two degree punching mechanisms of press of the present utility model, pre-power moulding by the first degree impact, impact typing by second degree again, elasticity bounce-back (springback) effect of working substance pressurized is minimized, increase finished product precision, and lower mechanical shock and impact noise, and prolong die life.

Claims

1. A stamping machine with a flexible second-degree stamping machine. The stamping machine has a crankshaft and a connecting rod driven by the crankshaft. The bottom of the connecting rod is provided with a slider that impacts the work object. It is characterized in that;

The connecting rod is divided into upper and lower two sections. One end of the upper section of the connecting rod is pivotally connected to the punching machine table, the other end is pivotally connected to a pivot block, one end of the lower section of the connecting rod is pivotally connected to the slider, and the other end is connected to the pivot. The connecting block is pivotally connected, the pivoting block is pivotally connected to the crankshaft, and the crankshaft drives the pivotal block.

2. The flexible secondary stamping mechanism of the impact machine as claimed in claim 1, wherein the pivotal block is a triangular block.