CN-121988667-A - Cooperative system of three-mobile-workbench press machine and control method thereof

CN121988667ACN 121988667 ACN121988667 ACN 121988667ACN-121988667-A

Abstract

The invention relates to a cooperative system of a three-mobile-workbench press and a control method thereof. Comprises three independently movable work tables, a high-precision positioning module, a mold identity recognition module, a safety interlocking module and a central control unit. The central control unit dynamically coordinates the circular movement of the three working tables between a mould preheating/preparing position, an online production position and a mould maintenance/disassembly position through a real-time scheduling algorithm, and performs safety interlocking with the action of a main sliding block of the press. The invention greatly improves the utilization rate of the press and the overall flexibility of the production line, and is particularly suitable for high-intelligent stamping production modes of multiple varieties and small batches.

Inventors

XU FUHENG
REN DONGJIE
LI SHENGLIN
CHEN CHUN

Assignees

扬州锻压机床有限公司

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (6)

1. A coordinated system of three-stage presses, said system comprising: Three work tables which have the same structure and can independently move along the fixed rail; The high-precision positioning module is arranged at key positions of the press body and the track and is used for detecting the positions of all the work tables in real time; The mold identity recognition module is arranged on each workbench and is used for automatically recognizing and verifying mold information; A central control unit configured to: 1) Receiving production order information and generating a workbench scheduling instruction containing a die sequence; 2) Tracking the accurate positions of the three work tables in real time according to the feedback of the high-precision positioning module; 3) Based on a preset scheduling strategy, dynamically distributing that the initial positions of the three working tables are respectively positioned at an on-line production position, a mould preparation position and a mould maintenance position; 4) The movement and locking of the workbench and the action of the main slide block of the press machine are controlled respectively to carry out safety interlocking.
2. The cooperation system of the three-mobile-table press machine of claim 1, wherein the die identity recognition module is an RFID reader-writer or a two-dimensional code scanner, and the high-precision positioning module is a combination of an absolute value encoder and a laser range finder.
3. The collaboration system of a three-stage press of claim 1, wherein the scheduling strategy is that when a first stage performs a stamping task in an "on-line production position", a second stage performs mounting, preheating and parameter presetting of a die required for a next production task in a "die preparation position", and a third stage performs dismounting, cleaning and maintenance of a used die in a "die maintenance position"; After the current production task is completed, the first workbench moves out to a 'mold maintenance position', the second workbench moves to an 'online production position' to immediately start production, and the third workbench moves to a 'mold preparation position' to start preparing a new mold, and the cycle is performed.
4. A three-stage press collaboration system as in claim 1 or 3 wherein the safety interlock ensures that the press master slide is allowed to start only after the target stage has reached the "on-line production position" with the lock completed and that the press master slide must be in a safe stop during stage movement.
5. A collaborative system for a three mobile table press according to claim 1 wherein said central control unit is further integrated with predictive maintenance functions that predict die life and schedule maintenance plans in advance in scheduling instructions based on die usage times, punch tonnage and historical data.
6. A method of coordinated control of three mobile station presses based on the system of any one of claims 1-5, comprising the steps of: S1, a central control unit receives a production plan and acquires the states and positions of three current work tables; S2, assigning a next set of dies for a workbench in a die preparation position according to a production sequence, verifying die information through a die identity recognition module, and simultaneously carrying out die preheating and parameter pre-adjustment; s3, monitoring the production progress of a workbench in an online production position; s4, when the production task of the workbench of the online production position is about to be completed, the workbench of the mould preparation position is instructed to move towards the online production position; S5, confirming that a workbench of a 'mould preparation position' accurately reaches an 'on-line production position' through a high-precision positioning module and locking; S6, immediately starting the next batch production by using a new die after the safety interlocking verification is completed; S7, the original workbench of the online production position is moved out to the die maintenance position for die disassembly and maintenance; s8, after the maintenance of the original workbench at the 'mould maintenance position' is completed, the workbench moves to the 'mould preparation position' to enter the next preparation period; and (3) repeating the steps S2 to S8 to realize the cyclic relay production of the three work tables.

Description

Cooperative system of three-mobile-workbench press machine and control method thereof Technical Field The invention relates to the technical field of large mechanical presses, in particular to a cooperative system of a three-mobile-workbench press and a control method thereof. Background In the stamping industry, in particular in the production of large parts such as automobile panels, household appliance housings, etc., mechanical presses are the core equipment. With the market development to the direction of individuation and customization, the production modes of multiple varieties and small batches become trend, and extremely high requirements are put on the flexibility and the intelligence of the production line. Conventional presses are typically configured with one stationary table or two moving tables. When the single-workbench press is used for replacing the die, the whole line machine is required to be stopped, the die replacing time is long, and the equipment utilization rate is low. The double-workbench press improves the problem to a certain extent, and one set of dies can be prepared outside the machine when the other set of dies are produced through the switching of the A/B tables. However, the dual stage system still has a bottleneck: 1. The preparation time is limited in that the standby table must have completed all the preparation (including mold installation, preheating, parameter setting, etc.) when the on-line mold production is completed. If the preparation is not completed, the press still needs to wait. 2. Lack of maintenance window-in efficient continuous production, cleaning, maintenance and minor repair of the mold require the use of bench time, which can affect the preparation of the next production cycle, resulting in an interruption in the production flow. 3. The flexibility is insufficient, and for complex production sequences requiring frequent switching of three or more dies, the "production-preparation" binary mode scheduling space for the dual stage is limited, and waiting is easily generated. Therefore, the prior art cannot provide sufficient mold preparation and maintenance time while ensuring extremely high production efficiency, and further improvement of the overall efficiency of the stamping production line is limited. Disclosure of Invention The invention aims to provide a cooperative system of a three-mobile-workbench press and a control method thereof, wherein a production-preparation-maintenance three-in-one working mode is constructed by introducing three workbenches, so that the die switching with nearly zero downtime is realized, and the comprehensive efficiency and the production flexibility of equipment are obviously improved. The technical scheme of the invention is that the cooperative system of the three-mobile-workbench press comprises: Three work tables which have the same structure and can independently move along the fixed rail; The high-precision positioning module is arranged at key positions of the press body and the track and is used for detecting the positions of all the work tables in real time; The mold identity recognition module is arranged on each workbench and is used for automatically recognizing and verifying mold information; A central control unit configured to: 1) Receiving production order information and generating a workbench scheduling instruction containing a die sequence; 2) Tracking the accurate positions of the three work tables in real time according to the feedback of the high-precision positioning module; 3) Based on a preset scheduling strategy, dynamically distributing that the initial positions of the three working tables are respectively positioned at an on-line production position, a mould preparation position and a mould maintenance position; 4) The movement and locking of the workbench and the action of the main slide block of the press machine are controlled respectively to carry out safety interlocking. Preferably, the mold identity recognition module is an RFID reader-writer or a two-dimensional code scanner, and the high-precision positioning module is a combination of an absolute value encoder and a laser range finder. Preferably, the scheduling strategy is that when the first workbench performs a stamping task in an on-line production position, the second workbench performs mounting, preheating and parameter presetting of a die required by the next production task in a die preparation position, and the third workbench performs dismounting, cleaning and maintenance of the used die in a die maintenance position; After the current production task is completed, the first workbench moves out to a 'mold maintenance position', the second workbench moves to an 'online production position' to immediately start production, and the third workbench moves to a 'mold preparation position' to start preparing a new mold, and the cycle is performed. Preferably, the safety interlock ensures that the press master slide is allowed