CN201291307Y

CN201291307Y - Digital control cam shaft lathe

Info

Publication number: CN201291307Y
Application number: CNU2008201002112U
Authority: CN
Inventors: 冀庆康; 刘萍; 张大明; 赵建平; 窦运林
Original assignee: CHONGQING YUEJIN MACHINERY Co Ltd
Current assignee: CHONGQING YUEJIN MACHINERY Co Ltd
Priority date: 2008-10-08
Filing date: 2008-10-08
Publication date: 2009-08-19
Anticipated expiration: 2018-10-08

Abstract

The utility model discloses a numerical control camshaft lathe. The lathe comprises a lathe bed part, a headstock, a tailstock, a cutter part and a control part, wherein the lathe bed part comprises a lathe bed, a Z-axis screw rod, a guide rail and a Z-direction moving plate; the Z-axis screw rod is arranged in the lathe bed, the guide rail is arranged on the lathe bed horizontally, and the Z-direction moving plate that can move along the guide rail is arranged in the middle of the lathe bed; the headstock is arranged at one end of the lathe bed, and a main shaft is penetrated through the middle part of the headstock; the tailstock is arranged at the other end of the lathe bed and can move along the guide rail; the cutter part is arranged on the Z-direction moving plate and comprises an upper bracket and a bracket; the cutter part also comprises a cutter moving device formed by connecting a feed actuating motor, an X-axis coupler, an X-axis screw rod, a nut and a moving body in sequence, wherein the moving body is supported and arranged between the upper bracket and the bracket by a rolling block; a cutter is arranged at the front end of the moving body; and the back end surface of the moving body is rigidly connected with the nut. The numerical control camshaft lathe has the advantages of less time and labor, high efficiency, low cost, good rigidity and high reliability, thereby meeting the requirement of rough machining for the camshaft moulding surface of the middle and low speed diesel engines.

Description

The Numerical Control Cam shaft lathe

Technical field

The utility model belongs to the numerically controlled lathe field, especially relates to a kind of cnc lathe that is used for the machining cam axle.

Background technology

In order to solve the roughing of camshaft, existing equipment can adopt the method for line milling, and the method for removing unnecessary surplus obtains.They are two years old, the processing of employing camshaft turning lathe, but S1-227 and two kinds of types of S1-236 that domestic camshaft turning lathe has only Shenyang one machine to produce, it all is the imitative type of hydraulic servo machinery, the tactical diameter of their design is φ 130mm, the tactical diameter of maximum processing then can not be processed for the camshaft that basic circle is bigger about φ 150mm.Its three, adopt existing profiling camshaft turning lathe, maximum problem must have exemplar, for small number, the more middle low-speed machine product of kind, preparing exemplar is the thing that bothers very much, time-consuming, effort, the cycle is oversize.Now, the producer of domestic not production Numerical Control Cam shaft lathe, the imitative type camshaft turning lathe of domestic hydraulic servo machinery all is towards low power high speed internal combustion engine, in can not finishing, the rough machined requirement of low-speed machine camshaft profile; To in high-power, the roughing of low-speed diesel engine camshaft not efficiently, cheaply, solution preferably.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of and can realizes maximum rotating diameter 350mm, maximum turning diameter 300mm, lift 40mm, the Numerical Control Cam shaft lathe of the turning processing of the camshaft of maximum length 1500mm.

The technical solution of the utility model is: a kind of Numerical Control Cam shaft lathe, comprise lathe bed part, headstock, tailstock, cutter part, digital control system, described lathe bed partly comprises lathe bed, be contained in this lathe bed Z axial filament bar, level are located at the guide rail on the lathe bed, are located at the Z that can move along this guide rail at the lathe bed middle part to movable plate; Described headstock is arranged on described lathe bed one end, and the main shaft that crosses this headstock is equipped with at this headstock middle part; Described tailstock is arranged on this lathe bed other end and can moves along described guide rail; Described cutter partly is arranged on described Z on movable plate, comprises upper bracket and bearing.Described cutter part also is provided with the cutter mobile device that is connected to form successively by feed servo motor, X-axis shaft coupling, X-axis screw mandrel, nut, moving body, this moving body is supported by scroll box and is installed between described upper bracket and the bearing, described moving body front end is equipped with cutter, and rear end face and described nut are rigidly connected.

The utility model cutter directly is contained on the moving body, is rigidly connected by X-axis screw mandrel, nut and moving body by the feed servo motor, drives moving body and does the front and back feed motion, finishes cam profile processing.This structure has improved the accuracy of shift motion, has reduced driving error, has improved the precision of transmission; Adopt the scroll box of high rigidity to support moving body, improved the rigidity and the stability of lathe.

Described X-axis screw mandrel is supported by the angular contact ball bearing of big contact angle.Angular contact ball bearing can bear radial load and axial load simultaneously, can work under high rotational speed, and contact angle is big more, and axial carrying capacity is high more.Duplex is installed in pairs, makes the outer ring of pair of bearings relative, and promptly wide end surface is to wide end surface, and narrow end surface can avoid causing additional axial force like this to narrow end surface, and can axle or shell is limited in the end-play scope at both direction.Such design makes tooling system be high stiffness and stability.

Described control section is to the feed motion of the gyration of main shaft and the cutter control that links, realize the turning of cam type surface, well solve the matching problem of the gyration and the cutter front and back feed motion of main shaft, improved the precision of molded lines processing with the profile processing of camshaft.

Also be equipped with parallel in the described headstock with described main shaft, and main motor, main reducing gear, lead spindle and the turning cylinder of Lian Jieing successively, be set with first gear on this turning cylinder, with this first gears engaged second gear arranged, this second gear set is on described main shaft.Servomotor is set on lathe,, has reduced middle transmission link, improved rotary stability and positioning accuracy by the motion of servomotor control main shaft gyration.

The bearing end is connected with Z axle shaft coupling, Z axle decelerator, Z axle servomotor in turn before the Z axial filament bar of described lathe bed part.Digital control system drives Z and moves in orbit to movable plate by servomotor control Z axial filament bar, realizes the lengthwise movement of cutter part, good reliability, and the transmission efficiency height, shift motion is accurate, has reduced driving error.

The beneficial effects of the utility model are: compare with the profiling camshaft turning lathe, saved the process of making exemplar, time saving and energy saving, the process-cycle is short.The utlity model has good rigidly, advantage that reliability is high, overcome the problem that existing camshaft turning lathe can only be processed the less camshaft of tactical diameter, turning diameter, satisfied in high-power, the rough machined requirement of low-speed diesel engine camshaft profile.The utility model machining accuracy height, efficient height, cost is low.

Description of drawings

Fig. 1 is the utility model general arrangement.

Fig. 2 is the A-A cross sectional view of Fig. 1.

Fig. 3 is the cutter part IV schematic diagram of Fig. 1.

Fig. 4 is the B-B cross-sectional view of Fig. 3.

Fig. 5 is the headstock II schematic diagram of Fig. 1.

The specific embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail:

To shown in Figure 5, the Numerical Control Cam shaft lathe is made up of lathe bed part I, headstock II, tailstock III, cutter part IV, control section as Fig. 1.

Lathe bed part I comprises lathe bed 8, be located at the preceding bearing 4 and the rear support 7 of lathe bed 8 front and back ends, be arranged on before 7 of bearing 4 and rear supports Z axial filament bar 5, be enclosed within the clasp nut 6 on the Z axial filament bar 5.The bearing end is connected with Z axle servomotor 1 by Z axle shaft coupling 3, Z axle decelerator 2 before the Z axial filament bar 5.Level is provided with two secondary guide rails 30 on the lathe bed 8, and wherein a secondary guide rail 30 is used to support cutter part IV, is provided with the Z that can move along guide rail at lathe bed 8 middle parts to movable plate 9, and this Z is rigidly connected to movable plate 9 and clasp nut 6.Cutter part IV is arranged on this Z on movable plate 9, and Z axle servomotor 1 moves along guide rail 30 to movable plate 9 by Z axial filament bar 5 control Z, realizes the lengthwise movement of cutter part IV cutter 11, finishes the processing of the whole profile of cam.

Tailstock III is arranged on lathe bed 8 another secondary guide rails 30, is used for the support of workpiece 10, and to the workpiece 10 of different length, tailstock III can move on guide rail 30, with adapt to workpiece 10 different lengths requirement.

Headstock II is arranged on lathe bed 8 one ends, and main shaft 29 is housed in the headstock II, and this main shaft 29 is positioned at headstock II middle part and crosses headstock II; Also be equipped with in the headstock II and main shaft 29 parallel and main motor 23, main reducing gear 24, lead spindle 25 and turning cylinders 26 that connect successively, be set with gear 1 on this turning cylinder 26, be engaged with gear 2 28 with gear 1, gear 2 28 is sleeved on the main shaft 29.Workpiece 10 clampings are between headstock II and tailstock III, and workpiece 10 1 ends link to each other with anchor clamps on the headstock, and the other end holds out against with the tailstock thimble.Main motor 23 rotates by turning cylinder 26, gear pair and drives main shaft 29 rotations, realizes that workpiece 10 rotates.

Cutter part IV is arranged on Z on movable plate 9, comprise upper bracket 22, bearing 19 and base 20, be provided with the cutter mobile device that connects to form successively by feed servo motor 12, X-axis shaft coupling 13, X-axis screw mandrel 14, nut 16, moving body 17 at

upper bracket

22 and 19 of bearings.Moving body 17 front ends are equipped with cutter 11, and rear end face and nut 16 are rigidly connected, and this moving body 17 supports by being distributed in the paired scroll box 21 of four parallel row of moving body 17 center lines, is installed between upper bracket 22 and the bearing 19; The front end of upper bracket 22 is equipped with stopping means 18.X-axis screw mandrel 14 is supported by the angular contact ball bearing 15 of big contact angle, and contact angle is 60 °, and this angular contact ball bearing 15 is installed on the bearing block, and bearing block is installed on upper bracket 22 and bearing 19 end faces.Feed servo motor 12 is done by X-axis screw mandrel 14 control moving bodys 17 and is moved around, and realizes the front and back feed motion of cutter 11, finishes the processing of cam profile.

Control section adopts digital control system, by 29 gyrations of digital control system control main shaft, the front and back feed motion of cutter 11 and the lengthwise movement of cutter 11; Wherein the front and back feed motion of main shaft 29 gyrations and cutter 11 mates the gyration of main shaft 29 and the front and back feed motion of cutter 11 for interlock control mutually, realizes the turning of cam type surface.

Claims

1. Numerical Control Cam shaft lathe, comprise lathe bed part (I), headstock (II), tailstock (III), cutter part (IV), control section, described lathe bed part (I) comprises lathe bed (8), Z axial filament bar (5), the level in this lathe bed (8) of being contained in is located at the guide rail (30) on the lathe bed (8), is located at the Z that can move along this guide rail (30) at lathe bed (8) middle part to movable plate (9); Described headstock (II) is arranged on described lathe bed (8) one ends, and main shaft (29) has been crossed at this headstock (II) middle part; Described tailstock (III) is arranged on this lathe bed (8) other end and can moves along described guide rail (30); Described cutter part (IV) is arranged on described Z on movable plate (9), comprise upper bracket (22) and bearing (19), it is characterized in that: described cutter part (IV) also is provided with by feed servo motor (12), X-axis shaft coupling (13), X-axis screw mandrel (14), nut (16), moving body (17) and connects successively, the cutter mobile device of forming, this moving body (17) is supported by scroll box (21) and is installed between described upper bracket (22) and the bearing (19), described moving body (17) front end is equipped with cutter (11), and rear end face and described nut (16) are rigidly connected.

2. Numerical Control Cam shaft lathe according to claim 1 is characterized in that: described X-axis screw mandrel (14) is supported by the angular contact ball bearing (15) of big contact angle.

3. Numerical Control Cam shaft lathe according to claim 1 is characterized in that: described control section is to the feed motion of the gyration of described main shaft (29) and described cutter (11) control that links.

4. Numerical Control Cam shaft lathe according to claim 1, it is characterized in that: also be equipped with parallel in the described headstock (II) with described main shaft (29), and the main motor (23) of Lian Jieing, main reducing gear (24), lead spindle (25) and turning cylinder (26) successively, be set with first gear (27) on this turning cylinder (26), be engaged with second gear (28) with this first gear (27), this second gear (28) is sleeved on the described main shaft (29).

5. Numerical Control Cam shaft lathe according to claim 1 is characterized in that: the preceding bearing end of Z axial filament bar (5) of described lathe bed part (I) is connected with Z axle shaft coupling (3), Z axle decelerator (2), Z axle servomotor (1) in turn.