CN114682680A

CN114682680A - Stamping die changing method

Info

Publication number: CN114682680A
Application number: CN202210229754.9A
Authority: CN
Inventors: 李承璋; 查向阳; 赵雷; 唐小龙
Original assignee: Chery Commercial Vehicle Anhui Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-07-01
Anticipated expiration: 2042-03-10
Also published as: CN114682680B

Abstract

The invention discloses a stamping die changing method, which comprises a first lifting trolley, a second lifting trolley and a multi-process workbench, wherein the first lifting trolley and the second lifting trolley are arranged in parallel, the multi-process workbench is arranged on a plurality of tracks, and the workbench is divided into a left workbench and a right workbench; the mould changing process comprises an outer mould changing process, wherein the first crane trolley performs outer mould changing on the left-side spaced workbench each time, the second crane trolley performs outer mould changing on the right-side spaced workbench each time, and the first crane trolley and the second crane trolley act on different tracks to perform mould changing at the same time; and after all the working tables on the left side and the right side finish the die replacement, uniformly performing internal die replacement. The invention can reduce the single batch secondary output, reduce the stock quantity and reduce the stock capital; the investment of vehicle type station appliances is saved, and the occupation of a stamping part warehouse site is reduced.

Description

Stamping die changing method

Technical Field

The invention relates to the technical field of single-batch small-batch production of automobile stamping, in particular to a stamping die changing method.

Background

At present, parts produced in a stamping workshop of an automobile main engine plant are large-scale covering parts and large-scale structural parts, and a five-sequence large-scale stamping automatic line is usually adopted for production. According to the traditional stamping outer die changing process design, five-sequence die outer die changing is finished by sequentially hoisting five times on the same crane, the outer die changing time is about 65 minutes generally, on the premise of not wasting capacity, a stamping line needs to continuously produce for about 65 minutes, and the single-batch secondary output is large. For example: the production cycle of the high-speed automatic stamping line is calculated according to 13.5SPM, the continuous production is carried out for 65 minutes, the single-batch secondary output is about 878 pieces, the larger the single-batch production is, the larger the stock is, and the more the stock funds are occupied.

On the premise of not wasting the productivity, the time of die change determines the continuous production time of the stamping line and determines the batch production quantity of the order. The external die changing mode is continuously researched in the industry, the external die changing time is shortened, and the small-batch production mode is realized. The novel stamping outer die change process well solves the problems.

Disclosure of Invention

The invention aims to provide a stamping die changing method.

In order to achieve the purpose, the invention adopts the following technical scheme:

a stamping die change method comprises a first lifting trolley, a second lifting trolley and a multi-process workbench, wherein the first lifting trolley and the second lifting trolley are arranged in parallel, the multi-process workbench is arranged on a plurality of rails and is divided into a left workbench and a right workbench;

the mould changing process comprises an outer mould changing process, wherein the first crane trolley performs outer mould changing on the left-side spaced workbench each time, the second crane trolley performs outer mould changing on the right-side spaced workbench each time, and the first crane trolley and the second crane trolley act on different tracks to perform mould changing at the same time;

and after all the working tables on the left side and the right side finish the die replacement, uniformly performing internal die replacement.

Preferably, the system comprises a stamping factory building, wherein the stamping factory building is of a two-span structure and comprises a first span and a second span, and the first span and the second span are both provided with hoisting traveling cranes;

the arrangement of the tracks extends into the second span from the first span so that the workbench close to the second span is opened to the second span for mold exchange.

Preferably, the distance between two columns crossing the boundary of the factory building is single-time press distance or double-time press distance.

Preferably, the multi-process workbench is a five-process workbench or a four-process workbench.

Preferably, the front sections of the first span and the second span are stored with molds.

Preferably, the second span is stored with the mold in an area outside the rail.

Preferably, the outer die changing process comprises the step of simultaneously changing the dies of the two crane cranes, wherein the first crane performs die changing on the left side of the workbench 1, the left side of the workbench 3 and the left side of the workbench 5, the second crane performs die changing on the right side of the workbench 2 and the right side of the workbench 4, and the outer die changing process is performed in a cross reciprocating mode until all the workbenches complete the outer die changing process.

Has the beneficial effects that: the invention mainly shortens the time of external die change of the stamping line, thereby shortening the time of batch production, achieving the purpose of reducing the quantity of batch production and simultaneously bringing the following advantages:

1. the single-batch secondary yield is reduced, the stock quantity is reduced, and the stock capital is reduced;

2. the investment of vehicle type station appliances is saved, and the occupation of a stamping part warehouse site is reduced.

Drawings

Fig. 1 is an overall structural view 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.

A stamping die changing method is characterized in that the overall plant layout is shown in figure 1, the stamping plant is of a two-span structure and comprises a first span and a second span, and dies are placed at the front ends of the two spans. The first span and the second span are both provided with hoisting travelling cranes, specifically a first hoisting travelling crane 5 and a second hoisting travelling crane 3;

and a multi-process table 2, the multi-process table 2 being mounted on the plurality of rails, the table being divided into a left-side table and a right-side table, and the multi-process table is exemplified by a five-sequence table as shown in the drawing.

The workbench is mounted on a rail, the arrangement of which extends from the first span into the second span, as shown in the figure, for the purpose of enabling the left workbench to enter the second span via the rail, and the mold change operation is performed by the first crane carriage 5. The column pitch of the factory building is designed to avoid the working platform to be opened to another span, and the distance between adjacent columns 4 in the working platform area is the single-time press distance or the double-time press distance.

Referring to the drawings, five-sequence tables are numbered, namely, a left side 1-5 table and a right side 1-5 table.

Specifically, when external mold changing is carried out, two hoisting travelling cranes change the mold simultaneously, and the left and right side workbenches are opened in a crossed mode.

The method specifically comprises the following steps: the

left side

1, 3 and 5 working tables are opened to the die change station of the second span along the rail, the right side 2 and 4 working tables are opened to the right die change station of the first span, and at the moment, the left side 2 and 4 working tables and the

right side

1, 3 and 5 working tables keep production in the stamping line. And then the first crane trolley 5 performs mould changing on the left side working tables 1, 3 and 5, and the second crane trolley 3 performs mould changing on the right side working tables 2 and 4. After the first die change is completed, the left and right workbenches are switched to the rest workbenches for die change, and after all the workbenches on the left and right sides are completely subjected to outer die change, inner die change is uniformly performed. In the concrete implementation, compared with the traditional process design of external die changing (1 stamping line is hoisted by a crane for 5 times and dies are sequentially changed), the time for 5-sequence external die changing is saved by 40%, the time for 4-sequence external die changing is saved by 50%, the production time can be shortened by 40% -50%, and the production batch is greatly reduced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A stamping die changing method is characterized by comprising a first lifting trolley, a second lifting trolley and a multi-process workbench, wherein the first lifting trolley and the second lifting trolley are arranged in parallel, the multi-process workbench is arranged on a plurality of rails and is divided into a left workbench and a right workbench;

2. The stamping die changing method according to claim 1, comprising a stamping factory building, wherein the stamping factory building is of a two-span structure and comprises a first span and a second span, and hoisting travelling cranes are installed on the first span and the second span;

3. The method of claim 2, wherein the distance between two cross-boundary columns of the factory building is a single press distance or a double press distance.

4. The method for stamping and die changing as recited in claim 1, wherein the multi-process station is a five-process station or a four-process station.

5. The method of claim 2, wherein the die is stored in the front sections of the first and second spans.

6. The method of claim 5, wherein the second region is outside the rail and stores the mold.

7. The stamping die changing method according to claim 1, wherein the external die changing process comprises the step of simultaneously changing dies of two crane cranes, wherein the first crane performs die changing on left-side working tables 1, 3 and 5, the second crane performs die changing on right-side working tables 2 and 4, and the operation is repeated in a crossed manner until all the working tables finish external die changing.