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Semi-intelligent position searching and machining method of digitally controlled machine tool

A CNC machine tool and intelligent technology, applied in metal processing equipment, metal processing mechanical parts, manufacturing tools, etc., can solve the problems of expensive machine tools and complex machine tool structures, and achieve the effect of saving money, simple process equipment, and concentrated processes

Inactive Publication Date: 2005-12-28
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ① For workpieces with large batches or complex shapes, special fixtures must be used
[0012] This new type of machining center adopts a parallel closed-chain multi-degree-of-freedom feed system and is directly driven by a linear motor. Therefore, it is necessary to make the machine tool spindle (driving the tool) move at a high speed with six degrees of freedom relative to the workpiece. The machine tool with multi-coordinate control function makes the structure of the machine tool relatively complicated, and the machine tool is very expensive (more than one million yuan)

Method used

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  • Semi-intelligent position searching and machining method of digitally controlled machine tool
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  • Semi-intelligent position searching and machining method of digitally controlled machine tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method of semi-intelligent positioning processing of CNC machine tools is carried out according to the following specific steps:

[0038] Test sample: gear pump cover, such as figure 1 and figure 2 as shown,

[0039] 1) Input the NC program prepared in advance for workpiece processing into the NC machine tool system.

[0040] 2) First place the large plane of the workpiece blank on the machine table at random, and fix the workpiece on the table with a pressure plate, T-slot screws (or magnetic chuck).

[0041] 3) Set the position finder with inner cone on the machine tool spindle 1, jog the worktable, so that the inner cone of the position finder 2 is correctly set on the first boss 5 of the workpiece 3, and record it by the CNC system Its coordinate value (X 1 , Y 1 ). Raise the taper sleeve to pull it out from boss 5. Such as figure 1 , figure 2 shown.

[0042] 4) Jog the workbench again, so that the inner taper sleeve of the finder is correctly set ...

Embodiment 2

[0057] Embodiment 2: basically the same as Embodiment 1, the difference is that the workpiece is placed randomly on the machine tool, so the Φ angle at this time is different from that of Example 1.

[0058] The second wax model test: if figure 1 , figure 2 as shown,

[0059] Place the second gear pump wax model blank on the machine table at will, and fix it on the table with T-slot screws and pressure plates, and repeat the above process. Get the following data:

[0060] x 1 =-10.564Y 1 =-66.252

[0061] x 2 =-70.348Y 2 =-67.196

[0062] ΔX=X 2 -X 1 =-59.784

[0063] ΔY=Y 2 -Y 1 =-0.94

[0064] Φ=arc tgΔY / ΔX=0.9(degrees)

[0065] Enter the Φ angle into the program, load the corresponding tool on the spindle, turn on the working cycle button, the machine tool executes the program, and completes all processing.

Embodiment 3

[0066] Embodiment 3: It is basically the same as Embodiment 2, except that the Φ angle is different. Second trial of the second wax pattern test:

[0067] Loosen the wax pattern processed above, move the workpiece, and re-press and fix it on the machine table. Repeat the test. Get the following data:

[0068] x 1 =-10.560Y 1 =-71.892

[0069] x 2 =-70.344Y 2 =-66.252

[0070] ΔX=X 2 -X 1 =-59.784

[0071] ΔY=Y 2 -Y 1 =5.64

[0072] Φ=arc tgΔY / ΔX=-5.389(degree)=354.611(degree)

[0073] Input the Φ angle into the program, load the corresponding tool on the spindle, turn on the working cycle button, and the machine tool executes the program. Since the surface required by the workpiece has been processed, during the second processing, the machine tool’s The cutting process is basically chipless machining.

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Abstract

The invention relates to a method for machining mechanical parts on a numerically controlled machine tool. The method for semi-intelligent location-seeking processing of CNC machine tools is characterized in that the coordinate positions of the two feature surfaces of the workpiece are searched for by a position finder in the spindle hole of the CNC machine tool. 1 (X 1 , Y 1 ) and O 2 (X 2 , Y 2 ) or orientation O 1 o 2 ; Obtain the rotation angle Φ of the workpiece coordinate system and the machine tool coordinate system through coordinate calculation, Φ=arc tgΔY / ΔX, where ΔX=X 2 -X 1 , ΔY=Y 2 -Y 1 , input the Φ angle into the special statement of the NC program compiled in advance according to the workpiece coordinate system, realize the translation of the coordinates through the tool setting point, start the NC program compiled in advance according to the workpiece coordinate system, and then process the required machining according to the program requirements The workpiece; the workpiece is a workpiece whose two characteristic surfaces are rotating surfaces. The invention has the characteristics of simple required equipment, high processing precision and simple operation.

Description

technical field [0001] The invention relates to a method for machining mechanical parts on a numerically controlled machine tool. Background technique [0002] For a long time, the manufacturing operation mode of "positioning-processing" has been widely used in the processing of parts in the world's machinery manufacturing industry. The core of the "positioning-processing" mode is that the parts to be processed must first be accurately positioned on the machine tool in strict accordance with the design and process requirements of the workpiece, so as to ensure that the relative positions of the workpiece, machine tool, and tool are consistent with the predetermined state, thereby ensuring Process qualified products. Therefore, the correct positioning of the machined parts will be the key to this manufacturing mode. [0003] ① For workpieces with large batches or complex shapes, special fixtures must be used. Each process has matching fixture positioning and clamping eleme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q16/00
Inventor 张仙珍
Owner WUHAN TEXTILE UNIV
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