CN101456086A - Cutter head mechanism for deep hole boring - Google Patents

Abstract

A cutterhead mechanism for deep hole boring, comprising a rotary cutterhead body (18) and a rotary cutterhead (17), characterized in that a worm gear shaft (II) is installed in the rotary cutterhead body (18), The worm gear (5) is installed on the worm gear shaft (II), and the worm gear (5) is meshed with the worm (6). The primary gear (1) and the final gear (10) are installed on the main shaft (I), and the primary gear (1 ) meshes with the first large gear (2), the final stage gear (10) meshes with the second large gear (9), the first small gear (3) meshes with the first planetary gear (4), and the second small gear (8 ) meshes with the second planetary gear (7) and is installed at both ends of the planetary shaft (III); the large bevel gear (11) meshes with the small bevel gear (12), and the small bevel gear (12) is installed on the screw rod (16 ) on one end, a screw nut (15) is installed on the screw mandrel (16), and the screw nut (15) links to each other with the cutter (14). The invention can effectively improve the machining efficiency of the boring machining of large-diameter and deep holes of different shapes, has stable machining accuracy and reasonable manufacturing cost.

Description

Cutter mechanism for deep hole boring

technical field

The invention relates to a cutterhead for deep hole boring with a large slewing support, in particular to a cutterhead mechanism for high-precision large-diameter tapered holes and irregular-shaped deep hole processing, specifically a deep hole boring tool. Cutter mechanism for cutting.

Background technique

As we all know, at present, boring is widely used in the machining of large-diameter deep holes and tapered holes. With the increase of diameter and stroke (hole depth), it is difficult to ensure the rigidity of the boring tool bar, which can easily lead to chatter The occurrence of the phenomenon will affect the machining efficiency and machining accuracy of large diameter and irregular deep hole boring. For this, at present, there is no good solution except to increase the diameter of the boring bar.

Contents of the invention

The purpose of the present invention is to design a boring bar that can arbitrarily change the amount of radial feed in the boring process so as to process various Cutter mechanism for deep hole boring with irregular bore and good rigidity.

Technical scheme of the present invention is:

A cutter head mechanism for deep hole boring, comprising a rotary cutter head body 18 and a rotary cutter head 17 connected to the machine tool spindle box, the machine tool spindle 1 is located in the rotary cutter head body 18, and the rotary cutter head 17 is installed on the machine tool spindle 1 extension Out of one end of the rotary cutter head body 18, it is characterized in that a worm gear shaft II parallel to the machine tool main shaft I is installed in the rotary cutter head body 18, and a worm gear 5 is installed on the worm gear shaft II, and the worm gear 5 is in phase with the worm screw 6. meshing, the worm 6 is connected with the worm driving device; the primary gear 1 and the final gear 10 are respectively installed on the main shaft 1 and both sides of the worm gear 5, and the final gear 10 and the large bevel gear 11 are duplex gears; the primary gear 1 and the installation The first large gear 2 at one end of the worm shaft II meshes, and the final gear 10 meshes with the second large gear 9 installed at the other end of the worm shaft II. The first large gear 2 and the first small gear 3 are dual gears. The two large gears 9 and the second pinion 8 are duplex gears, the first pinion 3 meshes with the first planetary gear 4, the second pinion 8 meshes with the second planetary gear 7, and the first planetary gear 4 meshes with the second The planetary gears 7 are respectively mounted on the two ends of the planetary shaft III passing through the worm gear 5, and the planetary shaft III is located on one side of the worm shaft II and is parallel to it; the large bevel gear 11 meshes with the small bevel gear 12, and the small bevel gear 12 is installed on the wire On one end of the rod 16, the screw mandrel 16 is installed in the rotary cutter head 17, the screw mandrel 16 is equipped with a screw nut 15, the screw nut 15 links to each other with the cutter 14, and the leading end of the cutter 14 is installed in the knife rest guide rail 13, The guide rail 13 is installed on the end face of the rotary cutter head 17 .

The connection between the screw nut 15 and the cutting tool can also be realized by using the following mechanism, that is, the screw nut 15 is directly connected to the slide block that can only move in a straight line, the cutter 14 is connected to the slide block, and the slide block is installed on the tool holder guide rail 13, the guide rail 13 is installed on the end face of the rotary cutterhead 17.

In addition, the transmission mechanism of the planetary gear can also be realized by the following method: the primary gear 1 meshes with the first large gear 2 installed at one end of the worm shaft II, and the final gear 10 meshes with the second gear installed at the other end of the worm shaft II. The large gear 9 meshes, the first large gear 2 directly meshes with the first planetary gear 4, the second large gear 9 directly meshes with the second planetary gear 7, and the first planetary gear 4 and the second planetary gear 7 are respectively installed on the The two ends of the planet shaft III of the worm gear 5, the planet shaft III is located on one side of the worm gear shaft II and is parallel to it.

The worm driving device is a speed-regulating motor, a stepless or stepped transmission device, and the like.

Beneficial effects of the present invention:

The invention can effectively improve the machining efficiency of the boring machining of large-diameter and deep holes of different shapes, has stable machining accuracy, reasonable manufacturing cost, simple structure and convenient manufacturing and installation. Utilizing the cutter head mechanism of the present invention, the hole diameter that can be processed is 600mm-1500mm, and the hole depth can reach 2000mm.

By properly controlling the drive of the worm of the present invention, the present invention can not only process the inner hole of the cylindrical surface, but also process the conical surface and various irregular shapes (which can be realized by controlling the output speed of the speed-regulating motor driving the worm by numerical control programming). Bore.

Description of drawings

Fig. 1 is a schematic diagram of the structural principle of the cutter head mechanism of the present invention.

Fig. 2 is a schematic diagram of the processing principle of the present invention.

Among Fig. 2, 19 is the bed of a machine tool, 20 is a workbench, 21 is a workpiece, and 22 is a spindle box of a machine tool.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawings and examples.

As shown in Figure 1.

A cutter head mechanism for deep hole boring, comprising a rotary cutter head body 18 and a rotary cutter head 17 connected to the machine tool spindle box, the machine tool spindle 1 is located in the rotary cutter head body 18, and the rotary cutter head 17 is installed on the machine tool spindle 1 extension Out of one end of the rotary cutterhead body 18, a worm gear shaft II parallel to the machine tool main shaft I is installed in the rotary cutterhead body 18, and a worm gear 5 is installed on the worm gear shaft II, and the worm gear 5 meshes with the worm screw 6, and the worm gear shaft II 6. It is connected with the worm driving device. The worm driving device can adopt a speed-adjusting motor, a continuously variable transmission device or a stepped transmission device, and can realize numerical control or programming control; the primary gear 1 and the The final gear 10, the final gear 10 and the large bevel gear 11 are double gears; the primary gear 1 meshes with the first large gear 2 installed at one end of the worm shaft II, and the final gear 10 meshes with the first large gear 2 installed at the other end of the worm shaft II The second large gear 9 meshes, the first large gear 2 and the first small gear 3 are double gears, the second large gear 9 and the second small gear 8 are double gears, the first small gear 3 and the first planetary gear 4 meshing, the second pinion 8 meshes with the second planetary gear 7, the first planetary gear 4 and the second planetary gear 7 are respectively installed at both ends of the planetary shaft III passing through the worm wheel 5, and the planetary shaft III is located at the worm wheel shaft II One side and parallel with it; the large bevel gear 11 meshes with the small bevel gear 12, the small bevel gear 12 is installed on one end of the screw mandrel 16, the screw mandrel 16 is installed in the rotary cutter head 17, and the screw mandrel nut is installed on the screw mandrel 16 15, the screw nut 15 is connected with the cutter 14, the guide end of the cutter 14 is installed in the tool holder guide rail 13, and the guide holder guide rail 13 is installed on the end surface of the rotary cutter head 17. As shown in Figure 1.

During specific implementation, the connection between the screw nut 15 and the cutting tool can also be realized by using the following mechanism, that is, the screw nut 15 is directly connected to the slider that can only move in a straight line, the cutter 14 is connected to the slider, and the slider is installed In the tool holder guide rail 13 , the guide holder guide rail 13 is mounted on the end face of the rotary cutter head 17 .

In addition, if the installation space permits, the transmission mechanism of the planetary gear can also be realized by the following method: the primary gear 1 is meshed with the first large gear 2 installed at one end of the worm shaft II, and the final gear 10 is installed with the The second large gear 9 at the other end of the worm shaft II meshes so that the first large gear 2 directly meshes with the first planetary gear 4, the second large gear 9 directly meshes with the second planetary gear 7, and the first planetary gear 4 meshes with the second planetary gear 7. The second planetary gear 7 is respectively installed on the two ends of the planetary shaft III passing through the worm gear 5, and the planetary shaft III is located on one side of the worm gear shaft II and is parallel to it.

The rotary cutter head body 18 of the present invention is fixedly connected with the machine tool headstock 22 by the flange, as shown in Figure 2, the machine tool spindle 1 is dragged by the main motor, directly drives the rotary cutter head 17 to rotate, and realizes the boring tool 14 The rotary motion of the worm screw 6 is driven by a speed-regulating motor to realize the radial feed motion of the boring knife 14.

When the speed-regulating motor (or other stepless and stepless driving devices, the same below) is not working, the power delivered by the main motor to the machine tool spindle is divided into two routes, one of which directly drives the rotary cutter head 17 to rotate, so that it is installed on the guide rail of the tool holder. The cutter 14 (boring cutter) on the 13 performs rotary motion; the other way drives the large bevel gear 11, Small bevel gear 12. At this time, the large bevel gear and the machine tool spindle rotate synchronously, and the rotation of the small bevel gear is driven by the speed difference between the large bevel gear and the machine tool spindle. When the speed difference is zero, the small bevel gear The gear does not produce rotary motion, that is, the bevel pinion 12 and the screw mandrel 16 only have the rotation around the axis of the machine tool spindle without rotation, so the cutter 14 (knife rest and screw nut 15) has no radial feed motion.

When the speed-regulating motor is working, the power passes through the worm 6 and the worm gear 5 to drive the planetary gears 4 and 7 to revolve around the worm shaft II, which is combined with the power of the main shaft I of the machine tool to generate the rotation of the planetary gears 4 and 7 around the planetary gear train shaft. Make the system form a synthetic motion. At this time, the large bevel gear 11 and the machine tool spindle 1 produce a rotational speed difference, which drives the small bevel gear 12 to rotate, thereby driving the screw mandrel 16 to rotate, and through the screw mandrel nut 15, the radial feed motion of the boring tool 14 is formed.

Through the rotary motion of the rotary cutter head 17, the radial feed motion of the boring tool 14 and the axial feed motion of the workpiece (worktable, see Fig. 2), the different continuous radial feed motions of the boring tool can be realized by using numerical control technology. The different continuous axial feed motions of the workpiece (table) are synthesized to meet the boring process of deep holes of different shapes for large slewing bearings.

The examples described above are only descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Under the premise of not departing from the design concept of the present invention, ordinary engineers and technicians in the field made the technical solutions of the present invention Various modifications and improvements should fall within the protection scope of the present invention.

The parts not involved in the present invention are the same as the prior art or can be realized by adopting the prior art.

Claims (4)

1, a kind of cutter head mechanism for deep hole boring, comprise the rotary cutter head body (18) that links to each other with the machine tool spindle box and the rotary cutter head (17), the machine tool main shaft (1) is positioned at the rotary cutter head body (18), The rotary cutter head (17) is installed on the end of the machine tool spindle (1) extending out of the rotary cutter head body (18). The worm gear shaft (II), the worm gear (5) is installed on the worm gear shaft (II), the worm gear (5) is meshed with the worm (6), and the worm (6) is connected with the worm driving device; on the main shaft (I), the worm gear The two sides of (5) are equipped with primary gear (1) and final stage gear (10) respectively, and final stage gear (10) and bevel gear (11) are duplex gears; Primary gear (1) and worm gear shaft ( II) The first large gear (2) at one end meshes, the final gear (10) meshes with the second large gear (9) installed at the other end of the worm shaft (II), the first large gear (2) meshes with the first small The gear (3) is a duplex gear, the second large gear (9) and the second pinion (8) are a duplex gear, the first pinion (3) meshes with the first planetary gear (4), and the second pinion (8) Mesh with the second planetary gear (7), the first planetary gear (4) and the second planetary gear (7) are respectively installed on the two ends of the planetary shaft (III) passing through the worm wheel (5), the planetary shaft (III) Located on one side of the worm shaft (II) and parallel to it; the large bevel gear (11) meshes with the small bevel gear (12), and the small bevel gear (12) is installed on one end of the screw shaft (16), and the screw shaft (16) is installed in the rotary cutterhead (17), and screw nut (15) is installed on the screw mandrel (16), and screw screw nut (15) links to each other with cutter (14), and the guide end of cutter (14) is installed on In the tool rest guide rail (13), the guide frame guide rail (13) is installed on the end face of the rotary cutter head (17). 2. The cutter head mechanism for deep hole boring according to claim 1, characterized in that the screw nut (15) is connected with a slider that can only move in a straight line, and the cutter (14) is connected with the slider, The slide block is installed in the knife rest guide rail (13), and the guide frame guide rail (13) is installed on the end face of the rotary cutter head (17). 3. The cutter head mechanism for deep hole boring according to claim 1, characterized in that said primary gear (1) meshes with the first large gear (2) installed at one end of the worm gear shaft (II), and the final stage The gear (10) meshes with the second large gear (9) installed on the other end of the worm shaft (II), the first large gear (2) directly meshes with the first planetary gear (4), and the second large gear (9) directly Mesh with the second planetary gear (7), the first planetary gear (4) and the second planetary gear (7) are respectively installed on both ends of the planetary shaft (III) passing through the worm wheel (5), the planetary shaft (III) Located to one side of the worm gear shaft (II) and parallel to it. 4. The cutter head mechanism for deep hole boring according to claim 1, characterized in that said worm driving device is a speed-regulating motor.

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