CN104163000A - Double-station pneumatic punching machine - Google Patents

Abstract

The invention discloses a double-station pneumatic punching machine which is composed of an air pump, a two-position four-way valve, a uniaxial telescopic air cylinder, two push rod mechanism sets and two punches. The uniaxial telescopic air cylinder is provided with a piston rod, an upper cavity and a lower cavity, wherein the upper cavity and the lower cavity are divided by the piston rod. The air pump is connected with the two-position four-way valve and an air inlet and an extraction opening of the two-position four-way valve are correspondingly connected with the lower cavity and the upper cavity respectively. Any push rod mechanism set comprises a toggle rod and a constant reinforcement lever, wherein one end of the toggle rod and one end of the constant reinforcement lever are connected in a hinged mode, the other end of the toggle rod is hinged to a piston rod, the other end of the constant reinforcement lever is fixed, and the position of the middle segment of the constant reinforcement lever is externally provided with the punches. The force output direction of the piston rod is consistent with the punching direction. By the adoption of the punching machine, through the angle and length force amplification effect of the toggle rod and the constant reinforcement lever, the requirement of the punching machine for air cylinder structure compactedness is met, meanwhile, the punching force is increased, and the punching effect is improved remarkably.

Description

Dual-station pneumatic stamping machine

Technical field

The present invention relates to a kind of double-station punching machine of pneumatic actuation, relate in particular to the double-station punching machine that a kind of drift delivery stroke is short and power output is larger.

Background technology

Stamping technology is one of stress metal processing method being widely used at present, and the feature that it has, and efficiency is high, quality good, energy is economized, cost is low, is widely used in press-fiting and assembling of various small parts.For the theory of environmental protection, pneumatic stamping machine overcomes the with serious pollution deficiency of hydraulic means and uses more and more extensive now.

Generally, stamping machine vertical output, realizes the punching press to single part.But in actual production, numerous parts need to be produced in batches, if the multiple workpiece of punching press simultaneously will certainly be enhanced productivity in this case.Common double-station punching machine principle is as shown in Figure 1: Compressed Gas enters cylinder middle part 13 from the left station 21 of two-position four-way valve 2, promote two cylinder pistons 11,12 and move left and right simultaneously, utilize the drift 3 that is installed in cylinder piston outer end the part on two stations to be carried out to punching press simultaneously; After this compressed air enters cylinder both ends 14 by the right working position 22 of two-position four-way valve 2 again, pulls two cylinder pistons and drives drift 3 to return.

Although above-mentioned stamping machine can be realized, two parts are processed simultaneously, but stamping machine is usually used in the process that press-fits of miniature parts (sheet material), so the stroke that needs drift output is compared with short and power is larger, and must be taking the volume of sacrifice cylinder as cost in order to realize this requirement, cause the huge of pressing equipment entirety duty.

Summary of the invention

In view of the defect that above-mentioned prior art exists, the object of the invention is to propose a kind of double air pressure stamping machine, solve the contradiction of stamping pressure and cylinder volume.

Above-mentioned purpose of the present invention, its technical solution being achieved is: Dual-station pneumatic stamping machine, it is characterized in that described stamping machine is by air pump, two-position four-way valve, single shaft is to telescopic cylinder, two cover transfer bar mechanisms and two drift compositions, upper chamber from piston rod to telescopic cylinder and lower chambers that wherein said single shaft has piston rod and divided by, air inlet and bleeding point that described air pump connects two-position four-way valve and two-position four-way valve are connected respectively lower chambers and upper chamber, the described transfer bar mechanism of arbitrary cover comprises toggle link and the permanent boosting lever that one end is hinged separately, the other end of described toggle link is articulated with piston rod, the other end of described permanent boosting lever is fixed and the external drift in middle section of permanent boosting lever, the power outbound course of piston rod is consistent with pressing direction.

Further, described permanent boosting lever self-retaining end is to 1/3rd external drifts in place of hinged end.

Further, described permanent boosting lever self-retaining end is to 1/2nd external drifts in place of hinged end.

Further, described single shaft is circular to the radial shape of telescopic cylinder.

Apply stamping machine of the present invention, utilize angle and the length power enlarge-effect of toggle link and permanent boosting lever, met the requirement of stamping machine to air cylinder structure compactedness, increased stamping press simultaneously, significantly promoted punching press effect.

Brief description of the drawings

Fig. 1 is the theory structure schematic diagram of existing common double-station punching machine.

Fig. 2 is the theory structure schematic diagram of Dual-station pneumatic stamping machine of the present invention.

Detailed description of the invention

The present invention innovates and has proposed a kind of double air pressure stamping machine, solves contradiction and a difficult problem for pneumatic stamping machine stamping pressure and cylinder volume.

As shown in Figure 2, this Dual-station pneumatic stamping machine, formed upper chamber 43 from piston rod to telescopic cylinder and lower chambers 42 that wherein this single shaft has piston rod 41 and divided by telescopic cylinder 4, two cover transfer bar mechanisms and two drifts 3 by air pump (not shown), two-position four-way valve 2, single shaft.Air inlet 21 and bleeding point 22 that this air pump connects two-position four-way valve 2 and two-position four-way valve are connected respectively lower chambers 42 and upper chamber 43.Make cylinder acting output services power by be filled with or arrange compressed air outward in lower chambers 42.For meeting the requirement of double operation, this pneumatic stamping machine is provided with the two cover transfer bar mechanisms that are connected respectively with piston rod and the drift being connected thereof, this arbitrary cover transfer bar mechanism comprises toggle link 51 and the permanent boosting lever 52 that one end is hinged by hinges 62 separately, the other end of toggle link 51 is articulated with piston rod by hinges 61, and the other end of permanent boosting lever 52 can be fixed on ground or miscellaneous equipment support.And above-mentioned drift 3 is external in the middle section of this perseverance boosting lever, the power outbound course of piston rod is consistent with pressing direction.

As optional embodiment, above-mentioned single shaft is circular to the radial shape of telescopic cylinder.Certainly the present invention is not limited to this in actual applications, can be any radial shape, and the upper and lower chamber that only need meet cylinder can be separated by, seal.

Pneumatic stamping machine embodiment illustrated in fig. 2 is in the time of real work, compressed air in air pump enters the lower chambers of cylinder from the left station of two-position four-way valve, promotion piston rod moves upward, piston rod promotes both sides toggle link motion simultaneously, along with the progressively rising of piston rod, the power outbound course of piston rod and one end that the angle α of toggle link reduces gradually and permanent boosting lever and toggle link are hinged eject to pressing direction displacement, utilize the power that angular effect rotates two permanent reinforcements (hereinafter to be referred as lever) lever to amplify, and under the effect of connecting rod, further drive drift to carry out punching press to the part on two stations.

Below just by setting up the mode of mechanical model, carry out the punching performance of two kinds of double-station punching machines shown in further analysis chart 1 and Fig. 2.

First, the theoretical power output of the conventional double-station punching machine shown in Fig. 1 and the computing formula of actual power output are respectively: $F_{1t}=\frac{\mathrm{\π}{D}^{2}p}{4}---\left(1\right),$ $F_{1o}=\frac{\mathrm{\π}{D}^{2}p}{4}---\left(2\right).$ In formula, F _1tfor the theoretical stamping press of drift; F _1ofor the actual stamping press of drift; D is piston diameter; P is compressed air pressure; η ₁for piston rod transmission efficiency, often get 0.97.

Secondly, the theoretical power output of the double-station punching machine preferred embodiment of the present invention shown in Fig. 2 and the computing formula of actual power output are respectively:

$F_{2t}=\frac{\mathrm{\π}{D}^{2}p}{8}\frac{l_1}{l_2\tan \mathrm{\α}}---\left(3\right),$ in formula, F _2tfor the theoretical stamping press of drift; F _2ofor the actual stamping press of drift; l ₁for lever master arm length; l ₂for lever passive arm length; α is angle between piston stick force outbound course and toggle link; for the equivalent friction angle of hinges; (l is centre-to-centre spacing between two hinges; R is the radius of hinge axis; F is the coefficient of friction between hinge axis and hole); η ₂for leverage, often get 0.97; η ₃for toggle link efficiency, often get 0.9.

Compare by calculating, under identical air pressure, as to get lever master arm length be l with the ratio of passive arm length ₁/ l ₂=3:1, α=6 °; The theoretical stamping press of stamping machine shown in Fig. 2 is more than 14 times of stamping machine shown in Fig. 1, even and if actual reinforcement effect also has 10 times more than.Certainly l ₁/ l ₂=2:1 or other ratio are also fine, and this pneumatic stamping machine of this creation has power output controllability in a big way as seen.

As can be seen here, stamping machine of the present invention utilizes angle and the length power enlarge-effect of toggle link and permanent boosting lever, meet the requirement of stamping machine to air cylinder structure compactedness, only use a cylinder as power input source, do not increasing under the condition of cylinder dimensions, in certain stroke, can significantly promote the stamping press amplitude of output, be more conducive to the punching press effect of workpiece.

In addition to the implementation, the present invention can also have other embodiment, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, within all dropping on the present invention's scope required for protection.

Claims (4)

1. Dual-station pneumatic stamping machine, it is characterized in that described stamping machine is by air pump, two-position four-way valve, single shaft is to telescopic cylinder, two cover transfer bar mechanisms and two drift compositions, upper chamber from piston rod to telescopic cylinder and lower chambers that wherein said single shaft has piston rod and divided by, air inlet and bleeding point that described air pump connects two-position four-way valve and two-position four-way valve are connected respectively lower chambers and upper chamber, the described transfer bar mechanism of arbitrary cover comprises toggle link and the permanent boosting lever that one end is hinged separately, the other end of described toggle link is articulated with piston rod, the other end of described permanent boosting lever is fixed and the external drift in middle section of permanent boosting lever, the power outbound course of piston rod is consistent with pressing direction.

2. Dual-station pneumatic stamping machine according to claim 1, is characterized in that: described permanent boosting lever self-retaining end is to 1/3rd external drifts in place of hinged end.

3. Dual-station pneumatic stamping machine according to claim 1, is characterized in that: described permanent boosting lever self-retaining end is to 1/2nd external drifts in place of hinged end.

4. Dual-station pneumatic stamping machine according to claim 1, is characterized in that: described single shaft to the radial shape of telescopic cylinder for circular.