KR200284941Y1 - Auto-slide face plate attachment for large size boring machine - Google Patents

Abstract

The present invention relates to a face plate device mounted on the spindle rotating shaft (2) of a large boring machine in the inner diameter cutting, outer diameter cutting and planar cutting of large structures, rack gear (2a), gear train (4), fixed It comprises a shaft (6), guide spot (8). The rack gear 2a is formed in the longitudinal direction on both sides of the spindle rotation shaft 2. The gear train 4 is inherently mounted to the body 3 of the face plate and is mounted symmetrically on both sides, and is rotatably connected to each other by meshing with the rack gear 2a of the spindle rotating shaft 2. The fixed shaft 6 is fixed to both ends in the body 3 of the face plate, and is arranged to be interposed between the pinion gear 5 and the input end 4c of the gear train. The guide spot 8 is mounted to slide up and down along the surface of the bed 3a on the face plate body 3, and is rack gear connected to the pinion gear 5 of the fixed shaft 6 so as to be rotatable. (7) is provided.

Therefore, the present invention is designed in such a way that the cutting tool is attached to both directions around the spindle rotation axis to be automatically transported and cut, thereby preventing eccentric machining due to the weight of the workpiece, and varying the turning radius of the two cutting tools. Rough machining and precision cutting of each workpiece are made at the same time, thereby improving productivity and minimizing the defect rate.

Description

Two-way feed slide face plate device of large boring machine {AUTO-SLIDE FACE PLATE ATTACHMENT FOR LARGE SIZE BORING MACHINE}

The present invention relates to a face plate device which is mounted on a large boring machine when cutting the inner diameter, outer diameter and planar cutting of a large structure, and more specifically, the cutting tool is attached to both sides of the spindle rotation axis to be automatically transferred and cut. It can be manufactured in a structure that can prevent eccentricity due to the weight of the workpiece, and coarse and precise cutting of the workpiece are performed at the same time to improve productivity as well as improve the process. It relates to a face plate device.

In general, boring of boring machine is a process in which boring machine enlarges or finishes the inside of the hole already drilled by drilling, forging, casting, etc. to be. The boring machine is similar to the turning operation, but the cutting method is the internal processing of the lathe, but there is a difference in the method. It is used for processing difficult workpieces.

In recent years, boring machines with new tools can be used not only for boring, reaming and tapping, but also for lathes such as face cutting, turning and threading. You can do what you have and also do some of the work of milling.

1 is a front view showing a transfer slide face plate device of a conventional large boring machine, Figure 2 is a side view showing a transfer slide face plate device of a conventional large boring machine.

Existing large boring machine is used for the face cutting device (Auto Face Plate) (11) when cutting the inner diameter, outer diameter and planar cutting of large structures. The face plate device 11 is rotatably connected to the spindle rotating shaft of the boring machine, and is provided with a guide spot 14 which slides along the bed surface 13 in the face plate head 12. . The tool holder 15 is mounted in the T groove in the guide spot 14, and the position can be changed. Reference numeral 16 denotes a cutting tool mounted on the tool holder.

Briefly, the conventional face plate device (Auto Face Plate) (10) is made of a structure in which a cutting tool is attached to only one direction while being transported in one direction only from the center of the spindle rotation axis of the boring machine.

However, the conventional face plate device 11 having such a structure is processed while being transported in only one direction during cutting, so that the center of gravity is remarkably biased to one side when the center of gravity exceeds a certain part in the machining part (center: Center). Eccentricity is easily generated due to inconsistency, and this results in over-cutting of the machining dimensions of precision parts, resulting in a decrease in cutting accuracy, especially leakage of gas (GAS) from workpieces used in power generation facilities such as nuclear power plants and hydropower plants. It was followed by a deadly defect such as an oil spill.

In addition, the eccentric processing is performed due to the relationship between the processing on only one side of the workpiece, and the surface roughness of the processing surface is worse due to severe shaking of the workpiece, which increases the defective rate of the product and decreases productivity and customers. Followed by a failure to meet this required quality.

In addition, since the boring machine manufacturers manufacture and supply them in a structure that cannot be processed on both sides according to the characteristics of the processing, they do not develop domestically and rely on all imports. there was.

Accordingly, the present invention is to solve the conventional problems as described above, the cutting tool is attached to both directions around the spindle axis of rotation to produce a structure that can be cut while automatically transferred to prevent eccentric processing due to the weight of the workpiece In addition, by turning the two cutting tools with different turning radiuses, the rough and precise cutting of the workpieces can be performed at the same time, thereby improving productivity and improving the process. The purpose is to provide.

1 is a front view showing a transfer slide face plate device of a conventional large boring machine.

Figure 2 is a side view showing a transfer slide face plate device of a conventional large boring machine.

Figure 3 is a front view showing the structure of the bidirectional slide slide face plate apparatus according to the present invention.

4 is a cross-sectional view taken along the line A-A 'of FIG. 3 according to the present invention.

5 is an exemplary cross-sectional view taken along line B-B 'of FIG. 3 according to the present invention.

Figure 6 is a side view showing the working radius of the tool mounted on the bidirectional slide slide plate device according to the present invention.

In order to achieve this object, the present invention is directed to a face plate device mounted on a spindle rotating shaft (2) of a large boring machine:

Rack gears (2a) formed in the longitudinal direction on both sides of the spindle rotation shaft (2); A gear train (4) inherent in the body (3) of the face plate and symmetrically mounted on both sides, and geared with the rack gear (2a) of the spindle rotating shaft (2) so as to rotate with each other; A fixed shaft (6) fixed at both ends in the body (3) of the face plate and arranged to be interposed between the pinion gear (5) and the input end (4c) of the gear train; And a guide spot having a rack gear 7 mounted to slide upward and downward along the surface of the bed 3a on the face plate body 3 and engaged with the pinion gear 5 of the fixed shaft 6 to rotate. It is characterized by including (8).

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Figure 3 is a front view showing the structure of the bi-directional slide slide plate according to the present invention, Figure 4 is a cross-sectional view of the line A-A 'of Figure 3 according to the present invention, Figure 5 is B of Figure 3 according to the present invention -B 'Line cross section example.

The present invention relates to a face plate device mounted to a spindle rotating shaft of a large boring machine for internal diameter cutting, external diameter cutting and planar cutting of large structures. The spindle rotation axis of the large boring machine performs the rotation operation with the face plate device installed, and the spindle rotation axis performs the forward and backward operation repeatedly, and it can move forward up to about 800mm and perform its function at 250 ~ 300mm. . The operation of this spindle axis is controlled by a control box installed in the main.

According to the present invention, the rack gear (2a) is formed in the longitudinal direction on both sides of the spindle rotation shaft (2). The rack gears 2a formed on both sides of the spindle rotating shaft 2 have a structure in which the rack gears 2a are meshed with the output end of the gear train 4 embedded in the body 3 of the face plate described later. Here, when the spindle rotating shaft 2 repeatedly performs the forward and backward operations by adjusting the control box, the gear train 4 engaged with the rack gear 2a of the rotating shaft 2 is rotated.

In addition, according to the present invention is used a gear train (4) mounted symmetrically on both sides while being inherent in the body (3) of the face plate to be engaged with the rack gear (2a) of the spindle axis of rotation (2) do. The gear train 4 is rotated by meshing with the rack gear 2a of the rotation shaft 2 while the three gears are engaged with each other. Here, an output gear 4a of the gear train 4 meshing with the spindle rotation shaft 2 is used as an idle gear, and an idle gear is used to transfer a rotational motion between two axes. It is preferable to use an idle gear as a gear to be engaged with the rack gear 2a of the rotating shaft 2 when the gear is placed in the middle or when the distance between the shafts is large or to change the rotation direction.

In addition, according to the present invention, a fixed shaft 6 fixed at both ends in the body 3 of the face plate and arranged at the input end 4c of the pinion gear 5 and the gear train is used. The fixed shaft 6 is installed in the longitudinal direction of the body 3 of the face plate, i.e., arranged in both sides with the center of the spindle rotating shaft 2. The pinion gears 5 are mounted on both sides of the input end 4c of the gear train mounted on the fixed shaft 6. Meanwhile, when the output end 4a of the gear train 4 rotates, the input end 4c engaged with the gear train 4 rotates, whereby the fixed shaft 6 rotates and the pinion gear 5 also rotates. .

In addition, according to the present invention, the guide spot 8 having the rack gear 7 is engaged with the pinion gear 5 of the fixed shaft 6 so as to rotate the surface of the bed 3a on the face plate body 3. The upper and lower slides are mounted to be transported accordingly. The guide spots 8 are provided on both sides with the center of the spindle axis of rotation 2. The rack gear 7 is interposed in the longitudinal direction (lateral direction) at the lower end of the guide spot 8. Rack gears (7) are installed at both ends of the guide spot (8), the rack gears (7) are installed on the pinion gear (5) upper part of the fixed shaft (6) inherent in the face plate body (3) is engaged with each other It becomes rotatable. Reference numeral 8a is a T-groove formed in the guide spot 8, 9 is a tool holder mounted on the T-groove of the guide spot, and 9a is a cutting tool mounted on the tool holder.

In operation, first, the face plate device 1 is mounted on the spindle rotating shaft 2 of the large boring machine. The control shaft installed in the main moves the spindle rotation shaft 2 forward and backward. This causes the gear train 4 meshed with the rack gear 2a of the spindle rotating shaft 2 to rotate. That is, the rotational force of the rotary shaft 2 is transmitted to the output end 4a of the gear train 4 to transmit the rotational force to the input end 4c, and then the fixed shaft 6 and the pinion gear 5 are rotated at the same time. do. As the pinion gear 5 rotates, the rack gear 7 of the guide spot 8 engaged with the pinion gear 5 rotates so that the guide spot 8 moves up and down along the surface of the bed 3a on the face plate body 3. The slide will be transported.

Here, a brief description will be made of an operation of adjusting the interval of the guide spot 8 by repeatedly performing the forward and backward movement of the spindle rotation shaft 2;

Forward / reverse operation of the spindle shaft 2 → rack gear 2a of the spindle shaft 2 → output stage 4a of the gear train 4 → input stage 4c of the gear train → rotation of the fixed shaft 6 The pinion gear 5 of the shaft 6 → the rack gear 7 → the guide spot 8 of the guide spot 8 moves up and down along the bed 3a surface. This operation is used to adjust the spacing of the guide spot (8) when cutting the inner diameter, outer diameter and plane cutting of large structures.

Figure 6 is a side view showing the working radius of the tool mounted on the bidirectional feed slide face plate apparatus according to the present invention, the distance between the tool holders 9 on both sides mounted in the T groove (8a) of the guide spot (8) It is installed differently, which means that both cutting tools 9a installed on the tool holder 9 mounted on the guide spot 8 are separated from the center of the spindle rotation axis 2 by the distance between the tools 9a. When cutting, one tool should be rough cut and the other tool will be precision cut. Unexplained reference numeral A denotes the radius of the rough machining tool, and reference numeral B denotes the radius of the precision machining tool.

Here, the angle of the tool is influenced by the diameter of the cutting tool and the material of the workpiece. The larger the diameter of the tool, the smaller the radial rake angle and the side rake angle. The size of the other angles depends on the material of the workpiece. During processing, the chip should be discharged away from the processing surface toward the center of the hole to not damage the processing surface.

Conventionally, the face plate device 11, which is processed while being transported in only one direction, becomes a flange and a workpiece having a diameter of 500 or more, while being out of the center of gravity at the center and out of a given tolerance of surface roughness and precision processing,

As such, the present invention has a structure in which cutting tools 9a are attached in both directions about the spindle rotation shaft 2 and are automatically transported to cut the center of gravity to prevent eccentric processing due to the weight of the workpiece. When cutting the workpiece, the distance (rotation radius) between the two cutting tools 9a from the center is changed so that one tool can be rough cut and the other tool can be precision cut. Since the face plate device (1) can be expected to improve productivity and cost reduction effect and improve the process to minimize the defect rate.

In addition, it can be processed regardless of material and size, and it is completed by one machine without repairing surface roughness by item by hand, which leads to excellent productivity improvement at low productivity and standardization in processing accuracy by not leaving the processing center. Products can be supplied.

It is apparent to those skilled in the art that the present invention is not limited to the embodiments described, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or modifications will have to belong to the utility model registration claims of the present invention.

As described above, the present invention has a structure in which cutting tools are attached to both directions about the spindle rotation axis and are automatically transferred to prevent cutting, thereby preventing eccentric machining due to the weight of the workpiece, and turning radius of the two cutting tools. By differently, the rough processing and the precise cutting processing of the workpieces are performed simultaneously, thereby improving productivity and minimizing the defect rate by improving the process.

Claims (2)

In the faceplate device mounted on the spindle rotating shaft (2) of a large boring machine: Rack gears (2a) formed in the longitudinal direction on both sides of the spindle rotation shaft (2); A gear train (4) inherent in the body (3) of the face plate and symmetrically mounted on both sides, and geared with the rack gear (2a) of the spindle rotating shaft (2) so as to rotate with each other; A fixed shaft (6) fixed at both ends in the body (3) of the face plate and arranged to be interposed between the pinion gear (5) and the input end (4c) of the gear train; And A guide spot mounted on the face plate body 3 so as to slide upward and downward along the surface of the bed 3a, and having a rack gear 7 to engage and rotate with the pinion gear 5 of the fixed shaft 6; 8) A bidirectional conveying slide face plate device of a large boring machine, characterized in that it comprises a. The method of claim 1, When cutting the workpiece by varying the distance between the tools 9a from the center of both cutting tools 9a installed in the tool holder 9 mounted on the guide spot 8, one tool performs rough cutting. And the other tool is a bi-directional feed slide face plate device of a large boring machine that allows precision cutting.