CN110394656B - Camshaft machining turning and milling center - Google Patents

Abstract

The present invention discloses a camshaft machining turning and milling compound machining center, comprising a frame, a main chuck assembly, a turning mechanism, and a milling mechanism. The turning mechanism, the main chuck assembly, and the milling mechanism are arranged on the frame. The turning mechanism comprises a base, a tool holder that can move along the axial direction of the main chuck assembly on the base. The main chuck assembly is arranged on the base. An automatic turntable is arranged on the tool holder. A plurality of turning tools are evenly fixed on the end surface of the automatic turntable in a radial shape along the radial direction of the automatic turntable. A feed mechanism is arranged between the tool holder and the automatic turntable. When machining a blank, the main chuck assembly clamps the blank, and then the moving motor is started to drive the first screw rod to rotate, drive the tool holder to move, drive the turning tool to approach the blank, and then the main chuck assembly rotates, and the feed mechanism drives the turning tool to turn the blank. After the turning is completed, the milling mechanism directly processes on the turned workpiece without secondary clamping, so as to avoid the secondary clamping reducing the machining accuracy.

Description

Camshaft machining turning and milling center

Technical Field

The invention relates to a processing equipment, and more particularly to a turning and milling compound processing center for processing a large engine camshaft.

Background technique

When machining a large engine camshaft, the camshaft needs to be machined first, then the outer hub surface of the cam is milled, and the hole of the shaft head end surface is machined. Under the existing equipment, it is necessary to machine the outer profile on a lathe, mill the outer hub surface of the cam on a camshaft-specific milling machine, and machine the hole of the shaft head end surface on a special machine tool. The three clampings are prone to positioning errors, resulting in low machining accuracy and low machining efficiency of the camshaft.

Summary of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a camshaft turning and milling compound machining center, which can complete external circle cutting, cam outer hub surface milling and shaft head end surface hole processing in one clamping, thereby improving the machining accuracy and efficiency and reducing the equipment footprint.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a camshaft machining turning and milling compound machining center, comprising a frame, a main chuck assembly, a turning mechanism, and a milling mechanism, the turning mechanism, the main chuck assembly and the milling mechanism are arranged on the frame, the turning mechanism comprises a base, and a tool holder which can move axially on the base along the main chuck assembly, the main chuck assembly is arranged on the base, an automatic turntable is arranged on the tool holder, a plurality of turning tools are evenly fixed on the end surface of the automatic turntable in a radial pattern along the radial direction of the automatic turntable, and a feed mechanism is arranged between the tool holder and the automatic turntable.

As a further improvement of the present invention, the automatic turntable includes a first seat, a first motor, a worm, a worm wheel and a mounting plate. The first motor is fixed on the first seat, the worm is rotatably mounted on the first seat and connected to the first motor, the mounting plate is rotatably mounted on the first seat, and the worm wheel is coaxially fixed to the mounting plate and meshes with the worm.

As a further improvement of the present invention, an installation cavity is provided in the base, a guide rail and a long guide hole connected to the installation cavity are provided on the side wall of the base, a connecting block and a guide groove adapted to the guide rail are provided at the bottom of the tool holder, a moving mechanism is provided in the installation cavity, the moving mechanism includes a moving motor and a first screw rod, the moving motor is fixed in the installation cavity, the first screw rod is rotatably installed in the installation cavity and connected to the moving motor, the connecting block extends into the installation cavity through the guide hole, a threaded hole is provided on the connecting block, and the first screw rod is engaged with the threaded hole.

As a further improvement of the present invention, the milling mechanism includes a base frame, a vertical frame, a lifting frame, a mounting frame and a milling cutter assembly, the base frame is provided with a Y motor and a Y screw rod, the vertical frame is provided with a Y screw sleeve, the Y motor is connected to the Y screw rod, the Y screw rod is meshed with the Y screw sleeve, the vertical frame is provided with a Z motor and a Z screw rod, the lifting frame is provided with a Z screw sleeve, the Z motor is connected to the Z screw rod, the Z screw rod is meshed with the Z screw sleeve, the lifting frame is provided with an X motor and an X screw rod, the mounting frame is provided with an X screw sleeve, the X motor is connected to the X screw rod, the X screw sleeve is meshed with the X screw rod, and the milling cutter assembly is installed on the mounting frame.

As a further improvement of the present invention, the milling mechanism also includes a tool magazine and an automatic tool changing mechanism, the tool magazine includes a bracket, a plurality of rollers, a belt-shaped carrier and a power mechanism for driving the rollers to rotate, the plurality of rollers and the power mechanism are arranged on the bracket, the power mechanism is connected to one of the rollers, and a plurality of placement holes for placing the milling cutter are evenly arranged on the carrier, the automatic tool changing mechanism includes a fork frame, a fork shaft, a rotating mechanism, a flipping mechanism and a translation mechanism, the translation mechanism includes a translation motor, a translation plate, a translation screw, the translation motor is fixed on the bracket, the translation screw is arranged on the bracket and connected to the translation motor A guide structure with the same direction as the translation screw is arranged between the translation plate and the bracket, a translation screw sleeve is fixed on the translation plate, the translation screw sleeve is meshed with the translation screw sleeve, the flipping mechanism includes a flipping motor, a second reducer and a flipping plate, the second reducer and the flipping motor are fixed on the translation plate and connected to each other, the flipping plate is fixed on the output end of the second reducer, the fork shaft is rotatably installed on the flipping plate, the rotating mechanism includes a rotating motor, a driving gear and a driven gear, the rotating motor is fixed on the flipping plate, the driving gear is fixed on the output end of the rotating motor, and the driven gear is coaxially fixed with the fork shaft and meshed with the driving gear.

The beneficial effect of the present invention is that when processing a blank, the main chuck assembly clamps the blank, and then the moving motor starts, driving the first screw to rotate, driving the tool holder to move, driving the turning tool close to the blank, and then the main chuck assembly rotates, and the feed mechanism drives the turning tool to turn the blank. When the tool needs to be changed, the first motor drives the worm to rotate, the worm drives the worm wheel to rotate, and the worm wheel drives the mounting plate to rotate, thereby moving the required turning tool to the working position. Through the above-mentioned settings, the blank can be automatically processed and the tool can be automatically changed without manual operation, thereby reducing labor costs. After turning is completed, the milling mechanism directly processes on the workpiece after turning, without the need for secondary clamping, thereby avoiding secondary clamping to reduce the processing accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an overall structural diagram of the present invention;

FIG2 is a structural diagram of the main chuck assembly and the turning mechanism;

Fig. 3 is a block diagram of the automatic turntable;

FIG4 is a structural diagram of a milling mechanism, a guide hole and an automatic tool changing mechanism;

FIG5 is a structural diagram of a milling mechanism;

FIG. 6 is a structural diagram of the automatic tool changing mechanism.

Detailed ways

The present invention will be further described below in detail with reference to the embodiments given in the accompanying drawings.

1 to 6 , a camshaft machining turning-milling compound machining center according to the present embodiment includes a frame 1, a main chuck assembly 2, a turning mechanism 3, and a milling mechanism 4. The turning mechanism 3, the main chuck assembly 2, and the milling mechanism 4 are arranged on the frame 1. The turning mechanism 3 includes a base 31, a tool holder 32 which can move axially on the base 31 along the main chuck assembly 2. The main chuck assembly 2 is arranged on the base 31. An automatic turntable 33 is arranged on the tool holder 32. A plurality of turning tools 34 are evenly fixed on the end surface of the automatic turntable 33 in a radial pattern along the radial direction of the automatic turntable 33. A feed mechanism is arranged between the tool holder 32 and the automatic turntable 33.

As an improved specific embodiment, the automatic turntable 33 includes a first seat 331, a first motor 332, a worm 333, a worm wheel 334 and a mounting plate 335. The first motor 332 is fixed on the first seat 331, the worm 333 is rotatably mounted on the first seat 331 and connected to the first motor 332, the mounting plate 335 is rotatably mounted on the first seat 331, and the worm wheel 334 is coaxially fixed with the mounting plate 335 and meshes with the worm 333.

As an improved specific implementation, an installation cavity is provided in the base 31, and a guide rail 311 and a long guide hole 312 connected to the installation cavity are provided on the side wall of the base 31. A connecting block 321 and a guide groove 322 adapted to the guide rail 311 are provided at the bottom of the tool holder 32. A moving mechanism is provided in the installation cavity, and the moving mechanism includes a moving motor 313 and a first screw rod 314. The moving motor 313 is fixed in the installation cavity, and the first screw rod 314 is rotatably installed in the installation cavity and connected to the moving motor 313. The connecting block 321 extends into the installation cavity through the guide hole 312, and a threaded hole is opened on the connecting block 321, and the first screw rod 314 engages with the threaded hole.

When processing a blank, the main chuck assembly 2 clamps the blank, and then the moving motor 313 is started, driving the first screw 314 to rotate, driving the tool holder 32 to move, driving the turning tool 34 close to the blank, and then the main chuck assembly 2 rotates, and the feed mechanism drives the turning tool 34 to turn the blank. When it is necessary to change the tool, the first motor 332 drives the worm 333 to rotate, the worm 333 drives the worm wheel 334 to rotate, and the worm wheel 334 drives the mounting plate 335 to rotate, thereby moving the required turning tool 34 to the working position. Through the above settings, the blank can be automatically processed and the tool can be automatically changed without manual operation, thereby reducing labor costs. After turning is completed, the milling mechanism directly processes on the turned workpiece without multiple clamping, thereby avoiding multiple clamping to reduce the processing accuracy.

As an improved specific implementation method, the milling mechanism 4 includes a base frame 41, a vertical frame 42, a lifting frame 43, a mounting frame 44 and a milling cutter assembly 45. The base frame 41 is provided with a Y motor 51 and a Y screw rod 52, the vertical frame 42 is provided with a Y screw sleeve, the Y motor 51 is connected to the Y screw rod 52, the Y screw rod 52 is meshed with the Y screw sleeve, the vertical frame 42 is provided with a Z motor 53 and a Z screw rod 54, the lifting frame 43 is provided with a Z screw sleeve, the Z motor 53 is connected to the Z screw rod 54, the Z screw rod 54 is meshed with the Z screw sleeve, the lifting frame 43 is provided with an X motor 55 and an X screw rod 56, the mounting frame 44 is provided with an X screw sleeve, the X motor 55 is connected to the X screw rod 56, the X screw sleeve is meshed with the X screw rod 56, and the milling cutter assembly 45 is installed on the mounting frame 44.

As a specific embodiment of the improvement, the milling mechanism 4 also includes a tool magazine 6 and an automatic tool changing mechanism 7. The tool magazine 6 includes a bracket 61, a plurality of rollers 62, a belt-shaped carrier 63 and a power mechanism for driving the roller 62 to rotate. The plurality of rollers 62 and the power mechanism are arranged on the bracket 61. The power mechanism is connected to one of the rollers 62. A plurality of placement holes 64 for placing the milling cutter are evenly arranged on the carrier 63. The automatic tool changing mechanism 7 includes a fork frame 71, a fork shaft 72, a rotating mechanism, a flipping mechanism and a translation mechanism. The translation mechanism includes a translation motor 75, a translation plate 73, and a translation screw 74. The translation motor 75 is fixed on the bracket 61. The translation screw 74 is arranged on the bracket 61 and connected to the translation motor 75. The translation plate 7 A guide structure having the same direction as that of the translation screw 74 is arranged between the bracket 61, a translation screw sleeve 76 is fixed on the translation plate 73, and the translation screw 74 is meshed with the translation screw sleeve 76. The flip mechanism includes a flip motor 77, a second reducer 78 and a flip plate 79. The second reducer 78 and the flip motor 77 are fixed on the translation plate 73 and connected to each other. The flip plate 79 is fixed on the output end of the second reducer 78. The fork shaft 72 is rotatably mounted on the flip plate 79. The rotating mechanism includes a rotating motor 80, a driving gear 81 and a driven gear 82. The rotating motor 80 is fixed on the flip plate 79, the driving gear 81 is fixed on the output end of the rotating motor 80, and the driven gear 82 is coaxially fixed with the fork shaft 72 and meshed with the driving gear 81.

After turning, the Y motor 51 drives the Y screw rod 52 to rotate, driving the stand 42 to move toward the blank, the X motor 55 drives the X screw rod 56 to rotate, driving the stand 42 to move toward the blank, and the milling cutter assembly 45 is moved above the blank. Then the milling cutter assembly 45 is started, and the Z motor 53 drives the Z screw rod 54 to rotate, driving the milling cutter assembly 45 to process the blank. When the tool needs to be changed, the power mechanism drives the roller 62 to rotate, drives the carrier 63 to rotate, and moves the required milling cutter to the tool change position. Then, the translation motor 75 drives the translation plate 73 to move, and the flip motor 77 drives the flip plate 79 to flip, and moves the fork frame 71 to the outside of the milling cutter. Then, the rotating motor a62 rotates to align the fork frame 71 with the milling cutter, and then the translation motor 75 drives the translation screw 74 to rotate in the opposite direction, so that the fork frame 71 forks the milling cutter to be replaced. After forking the milling cutter, the translation motor 75 reverses again to take the milling cutter out of the placement hole 64, and then, the rotation motor 80 drives the fork frame 71 to rotate to prevent the tool magazine 6 from interfering with the movement of the tool change mechanism. Then, the flip motor 77 drives the flip plate 79 to flip, so that the milling cutter flips to the other end and is in the tool change position, and then the tool change action is completed through the cooperation of the lifting and translation movement of the milling cutter assembly 45. Two working actions can be set on the fork frame 71, so that the work of removing and changing the tool can be completed in one movement, thereby improving work efficiency.

The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (3)

1. The utility model provides a camshaft processing turning and milling combined machining center which characterized in that: the automatic turning mechanism comprises a frame (1), a main chuck assembly (2), a turning mechanism (3) and a milling mechanism (4), wherein the turning mechanism (3), the main chuck assembly (2) and the milling mechanism (4) are arranged on the frame (1), the turning mechanism (3) comprises a base (31) and a tool rest (32) which can move on the base (31) along the axial direction of the main chuck assembly (2), the main chuck assembly (2) is arranged on the base (31), an automatic turntable (33) is arranged on the tool rest (32), a plurality of turning tools (34) are uniformly fixed on the end face of the automatic turntable (33) along the radial direction of the automatic turntable (33), and a cutter feeding mechanism is arranged between the tool rest (32) and the automatic turntable (33);

The milling mechanism (4) further comprises a tool magazine (6) and an automatic tool changing mechanism (7), the tool magazine (6) comprises a bracket (61), a plurality of rollers (62), a banded carrier (63) and a power mechanism for driving the rollers (62) to rotate, the rollers (62) and the power mechanism are arranged on the bracket (61), the power mechanism is connected with one of the rollers (62), a plurality of placing holes (64) for placing milling cutters are uniformly arranged on the carrier (63), the automatic tool changing mechanism (7) comprises a fork frame (71), a fork shaft (72), a rotating mechanism, a turnover mechanism and a translation mechanism, the translation mechanism comprises a translation motor (75), a translation screw (73) and a translation screw (74), the translation motor (75) is fixed on the bracket (61), the translation screw (74) is arranged on the bracket (61) and is connected with the translation motor (75), a guide structure with the translation screw (74) in the same direction as the translation screw (74) is arranged between the translation plate (73) and the bracket (61), the translation screw (73) is fixed with a speed reducer (76), the turnover mechanism (76) comprises a turnover screw (76) and a turnover sleeve (76), the second speed reducer (78) and the overturning motor (77) are fixed on the translation plate (73) and are connected with each other, the overturning plate (79) is fixed on the output end of the second speed reducer (78), the fork shaft (72) is rotatably mounted on the overturning plate (79), the rotating mechanism comprises a rotating motor (80), a driving gear (81) and a driven gear (82), the rotating motor (80) is fixed on the overturning plate (79), the driving gear (81) is fixed on the output end of the rotating motor (80), and the driven gear (82) is coaxially fixed with the fork shaft (72) and is meshed with the driving gear (81);

The automatic turntable (33) comprises a first seat (331), a first motor (332), a worm (333), a worm wheel (334) and a mounting plate (335), wherein the first motor (332) is fixed on the first seat (331), the worm (333) is rotatably mounted on the first seat (331) and connected with the first motor (332), the mounting plate (335) is rotatably mounted on the first seat (331), and the worm wheel (334) is coaxially fixed with the mounting plate (335) and meshed with the worm (333).

2. The camshaft machining turning and milling composite machining center according to claim 1, wherein: be provided with the installation cavity in base (31), the lateral wall of base (31) is provided with guide rail (311) and is banding guide hole (312) with the installation cavity intercommunication, the bottom of knife rest (32) is provided with connecting block (321) and guide slot (322) with guide rail (311) adaptation, be provided with moving mechanism in the installation cavity, moving mechanism includes moving motor (313), first lead screw (314), moving motor (313) are fixed in the installation cavity, first lead screw (314) are rotated and are installed in the installation cavity and be connected with moving motor (313), connecting block (321) are passed guide hole (312) and are stretched into the installation cavity, threaded hole has been seted up on connecting block (321), first lead screw (314) and threaded hole meshing.

3. The camshaft machining turning and milling composite machining center according to claim 1, wherein: milling mechanism (4) are including chassis (41), grudging post (42), crane (43), mounting bracket (44) and milling cutter subassembly (45), be provided with Y motor (51) and Y lead screw (52) on chassis (41), be provided with Y swivel nut on grudging post (42), Y motor (51) are connected with Y lead screw (52), Y lead screw (52) and Y swivel nut meshing, be provided with Z motor (53) and Z lead screw (54) on grudging post (42), be provided with Z swivel nut on crane (43), Z motor (53) are connected with Z lead screw (54), Z lead screw (54) and Z swivel nut meshing, be provided with X motor (55) and X lead screw (56) on crane (43), X motor (55) are connected with X lead screw (56) on mounting bracket (44), X swivel nut and X lead screw (56) meshing, milling cutter subassembly (45) are installed on mounting bracket (44).