CN102950306B - Method and device for machining 180-degree shaft hole of large rotating workpiece - Google Patents

Abstract

The invention relates to a method and device for processing a 180-degree shaft hole of a large-scale rotary workpiece. The pad iron is installed on the cutter head; place the workpiece on the pad iron of the same height, find the roundness according to the inner hole of the workpiece, find the roundness according to the reference end face, and find the roundness of one of the trunnion holes according to the initial marking line of the platform; use The diameter and end face of the trunnion hole at one end of the boring bar are processed. The boring bar is driven by a separate motor of the power head device to rotate, and the forward and backward movement of the bed is used to realize the feed. After processing, the bed returns to the initial state; The tooth division function performs precise indexing, and the cutter head rotates 180 degrees to process the trunnion hole at the other end. The invention has the advantages that the position accuracy of the two holes can reach within 0.1 mm after testing, and the high-precision manufacturing of the shaft holes at both ends of the large workpiece can be realized.

Description

A method and device for machining a 180-degree shaft hole of a large rotary workpiece

technical field

The invention relates to the field of machining, in particular to a method and a device for machining a 180-degree shaft hole of a large rotary workpiece.

Background technique

The 180-degree shaft hole of a large rotary workpiece is difficult to process, such as the trunnion hole of the export slag irrigation. Due to its large rotation diameter, the ear holes at both ends are on the center line, far away from the two ends of the center circle, so the process benchmark cannot be processed. Therefore, the coaxiality requirements of the two holes cannot be guaranteed. The usual processing method can only rely on scribing, and then use a large floor boring machine to complete the processing according to the scribing. However, the scribing error is very large, and it usually cannot meet the workpiece with high position accuracy requirements.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a method and device for machining 180-degree shaft holes of large-scale rotary workpieces, so as to realize the precision manufacturing of the shaft holes at both ends.

To achieve the above object, the present invention is achieved through the following technical solutions:

A method and device for machining a 180-degree shaft hole of a large rotary workpiece, comprising the following steps,

1) Install the power head device on the hobbing machine mounting bracket through the quartering hole;

2) Install several pieces of equal-height pad iron with a height error of less than 0.5mm on the cutter head;

3) Place the workpiece on the contour pad iron, find the roundness according to the inner hole of the workpiece, find out the roundness according to the reference end face, and find out the roundness of one of the trunnion holes according to the initial marking line of the platform;

4) Use the boring bar to process the diameter and end face of the trunnion hole at one end, use the independent motor of the power head device to drive the boring bar to rotate, use the forward and backward movement of the bed on the guide rail to realize the feed, and the machine bed will return to the initial state after processing ;

5) Accurate indexing is carried out through the precise tooth division function of the gear hobbing machine itself, the cutter head is rotated 180 degrees, and step 4 is repeated);

The device for processing the 180-degree shaft hole of a large-scale rotary workpiece includes a gear hobbing machine, a contour pad iron, a power head device, a connecting device, a boring bar, a contour pad iron is provided on the hobbing machine cutter head, and the gear hobbing machine body is connected to the power head device. The power head device is connected with the boring bar through the connecting device.

Compared with prior art, the beneficial effect of the present invention is:

It has been tested that the position accuracy of the two holes can reach within 0.1 mm by using the method, and the high-precision manufacturing of the shaft holes at both ends of the large workpiece can be realized.

Description of drawings

Fig. 1 is a structural front view of the present invention.

Fig. 2 is a structural side view of the present invention.

In the figure: 1-Contour pad iron 2-Workpiece 3-Power head device 4-Bed bed 5-Guide rail 6-Boring bar 7-Motor.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing of description:

A method and device for machining a 180-degree shaft hole of a large-scale rotary workpiece, as shown in Fig. 1 and Fig. 2, comprising the following steps,

1) Install the power head device 3 on the gear hobbing machine mounting bracket through the quartering holes;

2) Install several pieces of contour pad iron 1 whose height error is less than 0.5mm on the cutter head;

3) Place the workpiece 2 on the contour pad iron 1, find the roundness according to the inner hole of the workpiece 2, find the roundness according to the reference end face, and find out the roundness of one of the trunnion holes according to the initial marking line of the platform;

4) Use the boring bar 6 to process the diameter and end face of the trunnion hole at one end, use the separate motor 7 of the power head device 3 to drive the boring bar 6 to rotate, use the forward and backward movement of the bed 4 on the guide rail 5 to realize the feed, and after the machining is completed, the machine tool The bed 4 exits to the initial state;

5) Accurate indexing is carried out through the precise tooth division function of the gear hobbing machine itself, the cutter head is rotated 180 degrees, and step 4 is repeated.

The device for processing the 180-degree shaft hole of a large-scale rotary workpiece includes a gear hobbing machine, a contour pad 1, a power head device 3, and a boring bar 6. A contour pad 1 is provided on the hobbing machine cutter head, and the hobbing machine body is connected to the power head device. 3. The power head device 3 is connected with the boring bar 6 through the connecting device.

Process round holes with a diameter of 4 meters at both ends of the workpiece 2, and install the power head device 3 on the hobbing machine clamping bracket through the quartering holes; install 8 pieces of contour pad iron 1 with a height error of less than 0.5mm on the cutter head At the proper position, place the 11-meter-long workpiece 2 on the contour pad iron 1, find the roundness according to the inner hole of the workpiece 2, find the roundness according to the reference end face, and find out the roundness of one of the trunnion holes according to the initial marking line of the platform The diameter and the end face of the trunnion hole at one end are processed with the boring bar 6, and the independent motor 7 of the power head device 3 is used to drive the boring bar 6 to rotate. Body 4 exits to the initial state; precise indexing is performed through the precise tooth division function of the gear hobbing machine itself, and the cutter head rotates 180 degrees to process the trunnion hole at the other end. The workpiece 2 processed in this way has a shaft hole circle center deviation within 1mm, which fully meets the production needs.

The invention is suitable for realizing high-precision manufacturing of shaft holes at both ends of a large workpiece, and the position accuracy of the two holes can reach within 1mm after testing.

The above embodiments do not limit the present invention in any way, and all other improvements and applications made to the above embodiments in an equivalent transformation form belong to the protection scope of the present invention.

Claims (1)

1. a method for machining large rotary work piece 180 degree of axis holes, is characterized in that, comprise the following steps,

1) power head device being arranged on gear-hobbing machine by quartering hole is installed on support;

2) some height errors are less than the equal-height padding iron of 0.5mm, are arranged on cutterhead;

3) by work piece on equal-height padding iron, round positive by the endoporus of workpiece, levelling by datum end face, just looking for the circle in one of them gudgeon hole by platform initial scribes;

4) process diameter and the end face in gudgeon hole, one end with boring bar, utilize the separate electrical motor of power head device to drive and realize boring bar rotation, utilize lathe bed to realize feeding seesawing of guide rail, after completion of processing, bed piece is withdrawn into original state;

5) carry out accurate calibration by an accurately point tooth function for gear-hobbing machine lathe itself, cutterhead revolves turnback, repeats step 4);

Realize the device of the method for described machining large rotary work piece 180 degree of axis holes, comprise gear-hobbing machine, equal-height padding iron, power head device, jockey, boring bar, gear-hobbing machine cutterhead is provided with equal-height padding iron, and gear-hobbing machine lathe bed connects power head device, and power head device is connected with boring bar by jockey.