阅读说明：本技术 一种充液时间自动调整的电液式折弯机系统 (Electric liquid type bending machine system capable of automatically adjusting liquid filling time ) 是由 王精 于 2021-07-01 设计创作，主要内容包括：本发明公开了折弯机技术领域的一种充液时间自动调整的电液式折弯机系统,包括S1:通电,滑块进入快下阶段,进行下滑；S2:油缸上腔形成真空区,充液阀对油缸上腔进行充液；S3:设置充液时间为Tc,L为快下行程,L-0为不停顿距离,充液时间Tc＝f(L-L-0)*10ms,该充液时间自动调整的电液式折弯机系统,通过滑块的行程来对充液时间进行自动调整,使每一步折弯的快转慢过程,都能刚好油缸上腔充满油,保证慢下折弯阶段的稳定性,又不浪费过多的充液等待时间,提高加工效率。(The invention discloses an electrohydraulic bending machine system capable of automatically adjusting liquid filling time in the technical field of bending machines, which comprises a step S1 of electrifying, and gliding a slide block when the slide block enters a fast descending stage; s2, forming a vacuum area on the upper cavity of the oil cylinder, and filling liquid into the upper cavity of the oil cylinder by a liquid filling valve; s3, setting the liquid filling time as Tc, L as fast downward stroke, L 0 The liquid filling time Tc is f (L-L) without stopping distance 0 ) 10ms, the electro-hydraulic type bending machine system capable of automatically adjusting the liquid filling time automatically adjusts the liquid filling time through the stroke of the sliding block, so that the upper cavity of the oil cylinder can be just filled with oil in the fast-rotating and slow-rotating process of each step of bending, the stability of the slow-bending stage is ensured, excessive liquid filling waiting time is not wasted, and the machining efficiency is improved.)

1. The utility model provides an electrohydraulic bending machine system of liquid filling time automatic adjustment which characterized in that: the method comprises the following steps:

s1, electrifying, and making the slide block enter a fast descending stage to slide downwards;

s2, forming a vacuum area on the upper cavity of the oil cylinder, and filling liquid into the upper cavity of the oil cylinder by a liquid filling valve;

s3, setting the liquid filling time as Tc, L as fast downward stroke, L₀The liquid filling time Tc is f (L-L) without stopping distance₀)*10ms。

2. The liquid filling time automatic adjustment electrohydraulic bending machine system according to claim 1, characterized in that: l in S3₀The non-stopping distance is the distance of the front section of the fast descending stage, the upper cavity of the oil cylinder is normally filled with liquid (the fast descending stage is accelerated to the maximum speed at a constant speed from a static state), no vacuum area is generated, and when the distance is exceeded, the vacuum area is generated and becomes larger.

3. The liquid filling time automatic adjustment electrohydraulic bending machine system according to claim 1, characterized in that: and the steps also comprise slowly descending the sliding block, releasing the pressure of the oil cylinder and returning the sliding block after the liquid filling is finished.

Technical Field

The invention relates to the technical field of bending machines, in particular to an electric liquid type bending machine system capable of automatically adjusting liquid filling time.

Background

The electro-hydraulic bending machine is metal plate bending equipment, and an electro-hydraulic numerical control system controls opening flow, a pressure valve, a reversing valve, a liquid filling valve and the like of a proportional valve, so that a hydraulic oil cylinder is controlled to drive a sliding block to reciprocate up and down, an upper die arranged on the sliding block moves up and down, and plates are bent. And placing the workpiece plate on the plane of the lower die, and forming a bending angle on the workpiece under the pressure action of the upper die and the lower die when the upper die is pressed downwards to the workpiece. The quality of plate processing depends on the stability and accuracy of the position control of the slide block, and how to make the slide block act stably and quickly is the bending machine performance which must be paid attention to by bending machine manufacturers when bending workpieces.

The slide block of the existing electrohydraulic bending machine moves very fast in the fast descending stage, an upper cylinder cavity can form a vacuum area, oil pressure in an oil tank is fed into the upper cylinder cavity by atmospheric pressure, after the oil is fast descended to the position, the slide block rotates slowly after the liquid filling time is up, if the fast descending stage is long, the vacuum area formed by the upper cavity is large, and after the liquid filling time is up, the vacuum area of the upper cylinder cavity is not filled with oil, so that the slide block rotates slowly, and the slide block in the slow descending stage can move unstably and cannot be folded in place. The liquid filling time is set to be long enough to ensure that the upper cavity is completely filled with oil, and then the upper cavity is rotated slowly, but the bending time of the steps with short fast downward stroke (low return height) is longer, and the processing efficiency is low.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: an electro-hydraulic bending machine system capable of automatically adjusting liquid filling time comprises the following steps:

s1, electrifying, and making the slide block enter a fast descending stage to slide downwards;

s2, forming a vacuum area on the upper cavity of the oil cylinder, and filling liquid into the upper cavity of the oil cylinder by a liquid filling valve;

s3, setting the liquid filling time as Tc, L as fast downward stroke, L₀The liquid filling time Tc is f (L-L) without stopping distance₀)*10ms。

Preferably, L in S3₀The non-stopping distance is the distance of the front section of the fast descending stage, the upper cavity of the oil cylinder is normally filled with liquid (the fast descending stage is accelerated to the maximum speed at a constant speed from a static state), no vacuum area is generated, and when the distance is exceeded, the vacuum area is generated and becomes larger.

Preferably, the steps further comprise slowly descending the sliding block, releasing the pressure of the oil cylinder and returning the sliding block after the liquid filling is finished

Compared with the prior art, the invention relates to an electrohydraulic bending machine system capable of automatically adjusting the liquid filling time, which automatically adjusts the liquid filling time through the stroke of a sliding block, ensures that the upper cavity of an oil cylinder can be just filled with oil in the fast-rotating and slow-rotating process of each step of bending, ensures the stability of the slow-down bending stage, does not waste too much liquid filling waiting time, and improves the processing efficiency.

Drawings

FIG. 1 is a schematic flow chart of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1, when power is turned on, the slide block enters a fast descending stage to slide downwards, a vacuum area is formed on the upper cylinder cavity, the upper cylinder cavity is filled with liquid by the liquid filling valve, the liquid filling time is set to be Tc, L is a fast descending stroke, and L is a set value₀The liquid filling time Tc is f (L-L) without stopping distance₀) And (4) 10ms, slowing down the sliding block after the liquid filling is finished, relieving the pressure by the pressure relief valve when the dead point is reached, returning the sliding block to the top dead point after the pressure relief is finished, and repeating the actions to finish the bending process.

Wherein L is₀The non-stopping distance is the distance of the front section of the fast descending stage, the upper cavity of the oil cylinder is normally filled with liquid (the fast descending stage is accelerated to the maximum speed at a constant speed from a static state), no vacuum area is generated, and when the distance is exceeded, the vacuum area is generated and becomes larger.

In conclusion, the liquid filling time is automatically adjusted through the stroke of the sliding block, so that the upper cavity of the oil cylinder can be just filled with oil in the fast-rotating and slow-rotating process of each step of bending, the stability of the slow-down bending stage is ensured, excessive liquid filling waiting time is not wasted, and the machining efficiency is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.