Closed mechanical press ball screw type automatic pallet changer

Abstract

A closed mechanical press ball screw type automatic pallet changer comprises a base; a steel rail is arranged on the base and provided with one or two pallet changer bodies; the four corners of each pallet changer body are provided with idler wheel jacking devices; a ball screw driving device is arranged between each pallet changer body and the base; guide devices are arranged between the two sides of each pallet changer body and the base; conical positioning devices are arranged between the middles of the two sides of each pallet changer body and the base; clamping devices are arranged between the pallet changer bodies and the base; the front portions and the rear portions of the pallet changer bodies are provided with position detection devices, and the outer walls of the front portionsand the rear portions of the pallet changer bodies are provided with steel rail cleaning devices; the middle of the base is provided with four collision block automatic lifting devices at intervals; the four corners of the base are provided with edge collision block devices correspondingly; and a hydraulic pump station device is arranged in the base. The closed mechanical press ball screw type automatic pallet changer has the advantages of being accurate in guiding, precise in positioning, exact in moving distance and the like.

Description

Technical field: [0001] The invention relates to the technical field of forging machine tools, in particular to a ball screw type automatic exchange table of a closed mechanical press. Background technique: [0002] The exchange table is widely used in closed mechanical presses because it can easily replace molds or parts to be processed. However, when existing exchanging workbenches are used in practice, especially after a long period of use, a series of problems that affect the normal use of machine tools, the quality of forging parts and production efficiency often occur. [0003] Such as Figure 1-6 As shown, it is a commonly used exchange workbench for mechanical presses. The existing exchange workbench mainly has the following problems: (1) the existing exchange workbench has poor synchronization of the rollers when moving. Especially when the load is large and / or the working environment is poor, for example, when there is oil on the running track of the rollers, the ...

AI Technical Summary

Problems solved by technology

However, when the existing exchange table is used in practice, especially after a long time of use, a series of problems often appear that affect the normal use of the machine tool, the quality of the forged parts and the production efficiency

[0003] like Figure 1-6 As shown, it is a commonly used exchange table for mechanical presses. The existing exchange table mainly has the following problems: (1) The problem of poor synchronization of the rollers when the existing exchange table is moving

Especially when the load is heavy and / or the working environment is poor, for example, when there is oil on the running track of the rollers, the motor will drive the driving wheel to rotate, and slippage will occur, which will affect the synchronization

(2) The existing exchange table has the problems of low guiding precision and poor stability, which makes the rollers more likely to deviate or be damaged

The removal and return of the existing exchanging workbench is driven by one side. The motor drives the wheel hub to move, and the side gear is driven to rotate through the gear and the transmission shaft. Due to the gap between the gears, it is easy to cause errors, and long-term use causes cumulative errors, which eventually leads to Unbalanced load and out-of-sync problems

Moreover, the rollers are guided along the concave guide rail. When the driving wheels on both sides are not synchronized and run off, the alignment can only be made by the hard friction between the hub and the concave guide rail. Long-term use will cause the hub and the concave guide rail to wear quickly, and the guiding accuracy will be reduced.

The concave guide rail is easy to accumulate sundries, and it is not easy to clean. The surface of the steel guide rail has countersunk holes, and the flatness of the concave guide rail and the roughness of the hub are easily damaged by long-term intraocular pressure.

(3) The stop position of the existing exchange table is inaccurate, which affects the positioning accuracy

When the traditional exchange table moves out or the return journey approaches the end, it relies on the proximity switch to generate a signal to decelerate and stop the drive motor, and then the exchange table relies on sliding to hit the limit block to stop the positioning, but the limit block is easily deformed after a period of use, which eventually leads to Inaccurate stop position

(4) Only one exchange workbench can be installed due to the fixed impact block, and the exchange workbench cannot be used interchangeably, which affects automatic film change and production efficiency

(5) After the exchange table is moved out, it cannot be accurately positioned and the corresponding clamping mechanism causes the exchange table to be in an active state, and it is easy to move when replacing the mold, resulting in inaccurate mold positioning

(6) The existing exchange table uses cylindrical pins for positioning. Long-term use is easy to cause wear and tear, and the return positioning is not accurate. Every time the mold is changed, it needs to be re-positioned. The cylindrical pins are seriously worn after long-term use and need to be replaced and re-positioned.

(7) The existing exchange table does not have a corresponding overload protection device. Once overloaded, it is easy to crush the guide rail and damage the accuracy of the machine tool

(8) Most of the traditional exchange workbenches are manual replacement of molds. When the mold needs to be replaced, after the exchange workbench is moved out, the mold is manually lifted away, and then a new mold is replaced. During the replacement process, the mold position must be manually positioned, clamped and corrected, and After moving the work back to the original position, the center position of the mold and the slider must be re-calibrated. When the positioning pin of the exchange table is worn out, the positioning accuracy is often inaccurate, and repeated calibration is required. Automated and intelligent production line needs to automatically exchange worktables

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