CN102000867B - Connecting flange used for numerical control screw milling machine - Google Patents

Abstract

The invention belongs to the field of numerical control milling machines, and in particular relates to a connecting flange used for a numerical control screw milling machine, which comprises an annular rotary part, wherein the outer circumference surface of the rotary part is provided with a jacket, and a cavity for accommodating a cutter bar is arranged on the jacket. When the connecting flange is in real work, the connecting flange is fixed at the top of a stand column of the numerical control screw milling machine, the connecting flange is rotatably matched with the stand column, and a vertical milling head is fixed at one side of the connecting flange, which is far away from the stand column. Because the vertical milling head is rotatably matched with the stand column through the connecting flange, when a workpiece is processed, the vertical milling head can rotate around the stand column according to the real condition so as to realize the processing requirements on various thread curves on the workpiece; and the invention has the advantages of simple structure and reliable property, and is easy to produce and manufacture.

Description

A connection flange for CNC screw milling machine

technical field

The invention belongs to the field of numerically controlled milling machines, and in particular relates to a connecting flange for a numerically controlled screw milling machine.

Background technique

The traditional milling machine is equipped with an end milling head on the side of the column facing the workbench. At the same time, the column is equipped with a Z-axis drive device that makes the end milling head slide up and down along the column, so the end milling head can move up and down along the column during work. However, this design method prevents relative rotation between the end milling head and the column. The end milling head usually can only process the workpiece along the vertical direction, which cannot meet the processing requirements for thread curves in actual production.

Contents of the invention

The object of the present invention is to provide a connecting flange for a CNC screw milling machine, which has a simple structure and can better meet the processing requirements for various thread curves when matched with an end milling head.

In order to achieve the above object, the present invention adopts the following technical solutions: a connecting flange for a numerically controlled screw milling machine, the connecting flange includes an annular turning part, and a sheath is arranged on the outer peripheral surface of the turning part, and the sheath There is a cavity for accommodating the knife rod on the top, and the end of the sheath away from the turning part is provided with a support seat, and the support seat is provided with a hole for the knife rod of the tool to pass through. It constitutes a rotational fit; the sheath extends outward from the outer circumferential surface of the revolving part along the radial direction of the revolving part, and the cross section of the sheath along the direction parallel to the central axis of the revolving part is arc-shaped; the sheath The arc length of the section of the sheath along the direction parallel to the central axis of the turning part gradually expands from the side close to the turning part to the side away from the turning part; Arc section and equal arc section, the arc length of the section parallel to the central axis of the turning part of the expanding arc section gradually expands from the side close to the turning part to the side away from the turning part, and the arc length of the equal arc section is parallel to the central axis of the turning part The arc length of the section in the direction is equal from the side close to the turning part to the side away from the turning part, and the arc length of the intersection of the expanding arc section and the equal arc section is equal.

In actual work, fix the connecting flange on the top of the column of the CNC screw milling machine, and make the connecting flange and the column form a rotational fit, and then fix the end milling head on the side of the connecting flange away from the column; The milling head forms a rotation fit with the column through the connecting flange, so when processing the workpiece, the end milling head can rotate around the column according to the actual situation, so as to meet the processing requirements for various thread curves on the workpiece, and the structure of the invention is simple And reliable performance, easy to produce and manufacture.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2A is a structural schematic diagram of a connecting flange;

Fig. 2B is a structural schematic diagram of a connecting flange;

Figure 3 is a schematic diagram of the assembly of the connecting flange and the end milling head;

Fig. 4 is a three-dimensional schematic diagram of the connecting flange driving the rotation of the end milling head;

Fig. 5 is a side view of the CNC milling machine.

Detailed ways

As shown in Figures 1 to 5, a connecting flange for a CNC screw milling machine includes a workbench 20 and a column 30 fixed on the bed 10, and the top of the column 30 facing the workbench 20 is provided with a vertical The milling head 40, the end milling head 40 and the top of the column 30 are rotationally engaged.

As shown in FIGS. 2A to 4 , the end milling head 40 forms a rotational fit with the column 30 through a connecting flange 50 . The top side of the rotary part 51 is connected with the worktable 20, and the other side of the rotary part 51 is provided with the end milling head 40 fixedly connected with it.

The connecting flange 50 ensures that the end milling head 40 can rotate α degrees to the left and right relative to the column 30. The α degree angle is preferably 45°, as shown in FIG.

There are many ways to realize the rotational cooperation between the rotating part 51 of the connecting flange 50 and the workbench 20. For example, the connection between the working table 20 and the turning part 51 of the connecting flange 50 is provided with a motor-driven rotating shaft. The rotating part 51 of the connecting flange 50 is fixedly sleeved on the rotating shaft. The fixed sleeve means that the inner ring of the annular rotating part 51 forms an interference fit with the rotating shaft or the inner ring of the rotating part 51 The ring and the rotating shaft can be fixed in other ways by screwing; or install a shaft-shaped convex part on the top side of the workbench 20, and set the inner ring of the rotary part 51 on the shaft-shaped convex part, and Install a motor on the top of the workbench 20 to drive the connecting flange 50 to rotate around the shaft-shaped protrusion.

Preferably, four T-shaped screws can be used to fix the position of the end milling head 40 at any angle within its rotation range, so as to facilitate the cutting process.

As shown in Figures 2A, 2B, 3, and 4, a sheath 52 is provided on the outer peripheral surface of the rotary part 51, and the sheath 52 is provided with a cavity for accommodating the cutter bar, and the sheath 52 plays a role in protecting the tool bar. So that the two will not suffer from the effect of accidental collision.

The sheath 52 extends from the outer peripheral surface of the turning part 51 radially outwards of the turning part 51 , and the cross section of the sheath 52 along the direction parallel to the central axis of the turning part 51 is arc-shaped. The arc-shaped sheath 52, that is, the sheath 52 is open, and the side of the sheath 52 away from the column 30 is open; One side of the end milling head 40 is fixedly connected, and the milling cutter bar 41 of the end milling head 40 extends downwards from the upper part of the end milling head 40 along the direction perpendicular to the central axis of the turning part 51. The bottom end of the milling cutter bar 41 is provided with a milling cutter 42. The sheath 52 wraps around the outside of the milling cutter 42, as shown in FIGS. 3 and 4 .

As shown in FIGS. 2A and 2B , the arc length of the section of the sheath 52 along the direction parallel to the central axis of the turning portion 51 gradually increases from the side close to the turning portion 51 to the side away from the turning portion 51 .

Further, the sheath 52 is divided into an arc expansion section 521 and an equal arc section 522 from the side close to the turning part 51 to the side away from the turning part 51. The arc expansion section 521 is parallel to the axis of the turning part 51. The arc length of the cross-section gradually expands from the side close to the turning part 51 to the side away from the turning part 51, and the arc length of the section of the equal arc segment 522 along the direction parallel to the central axis of the turning part 51 moves away from the side close to the turning part 51. Both sides of the turning portion 51 are equal, and the arc lengths at the intersections of the expanded arc segment 521 and the equal arc segment 522 are equal.

The said equal arc section 522, that is, the end of the sheath 52 away from the turning part 51 is provided with a support seat 53, and the support seat 53 is provided with a hole for the milling cutter bar 41 of the tool to pass through, and the bottom of the milling cutter bar 41 The end is connected with the support base 53, and the milling cutter rod 41 and the support base 53 form a rotational fit. The setting of the support seat 53 ensures the rigidity of the milling cutter shaft 41, so that the milling cutter shaft 41 is not easily deformed and can work stably.

As shown in Figure 5, the workbench 20 is located on the side of the column 30 and the underside of the end milling head 40, the upper table surface of the workbench 20 is inclined, and from the side away from the column 30 to the side close to the column 30 Gradually slope down.

The angle between the upper surface of the workbench 20 and the horizontal plane is β, and the β is preferably 10°.

The workbench 20 is inclined by 10° relative to the guide rail surface of the bed 10. On the one hand, it is convenient to remove iron filings during the machining process. Obtain the best cutting performance in the cutting process, while ensuring the dimensional accuracy of the workpiece, it also improves the durability of the tool.

Claims (1)

1. A connecting flange for a CNC screw milling machine, characterized in that: the connecting flange (50) includes an annular turning part (51), and a sheath ( 52), the sheath (52) is provided with a cavity for accommodating the cutter bar, and the end of the sheath (52) away from the turning part (51) is provided with a support seat (53), and the support seat (53) A hole is provided for the knife rod of the tool to pass through; The sheath (52) extends outward from the outer circumferential surface of the turning part (51) along the radial direction of the turning part (51), and the direction of the sheath (52) is parallel to the central axis of the turning part (51). The cross-section is arc-shaped; The arc length of the section of the sheath (52) along the direction parallel to the central axis of the turning part (51) gradually expands from the side close to the turning part (51) to the side away from the turning part (51); The sheath (52) is divided into an arc-expanding section (521) and an arc-equal section (522) from the side close to the turning part (51) to the side away from the turning part (51). The arc length of the section parallel to the central axis of the turning part (51) gradually expands from the side close to the turning part (51) to the side away from the turning part (51), and the edge of the equal arc segment (522) is parallel to the turning part (51) ) The arc length of the section in the direction of the central axis is equal from the side close to the turning part (51) to the side away from the turning part (51), and the arc length of the intersection of the expanded arc section (521) and the equal arc section (522) is equal .

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