CN201493703U

CN201493703U - Cutter hitting cam mechanism in cutter exchange device

Info

Publication number: CN201493703U
Application number: CN2009201095412U
Authority: CN
Inventors: 王保森; 王爱华; 郭爱; 梁利人; 刘林
Original assignee: BEIJING MASTER METAL Co Ltd
Current assignee: BEIJING MASTER METAL Co Ltd
Priority date: 2009-06-30
Filing date: 2009-06-30
Publication date: 2010-06-02
Anticipated expiration: 2019-06-30

Abstract

The utility model relates to the technical field of an automatic cutter exchange in machine tools, and particularly provides a cutter hitting cam mechanism in a cutter exchange device. The structure comprises a main spindle head on a machine tool, wherein the lower end of the main spindle head is connected with a cutter through a cutter pulling mechanism, the upper end of the main spindle head is connected with a cutter hitting arm through a cutter hitting disk, the other end of the cutter hitting arm is connected with a bearing, the bearing keeps contact with a cam surface of a fixed cutter hitting cam, a first cam surface part, a second cam surface part, a third cam surface part and a fourth cam surface part are arranged on the cam surface of the cutter hitting cam, wherein the first cam surface part, the second cam surface part, the third cam surface part and the fourth cam surface part are connected in series to form a wave-shaped cam surface. Compared with the prior art, the cutter hitting cam mechanism in the cutter exchange device can lower the impact in the cutter exchange process through optimizing the cutter hitting cam, and improves the service life of the machine tool and the cutter exchange efficiency.

Description

The cam mechanism of forging a knife in a kind of cutter switch

Technical field

The utility model relates to the automatic tool changer technical field in the lathe, and the cam mechanism of forging a knife in a kind of cutter switch specifically is provided.

Background technology

Traditional system that forges a knife is as shown in Figure 1: the rotating arm of forging a knife is set on main tapping, collides with the dish of forging a knife when the arm of forging a knife rotates and it is pushed, make the cutter that is installed in main shaft open.In structure as shown in Figure 1, when main tapping rises, being located at the arm bearing at end of forging a knife contacts with the cam surface of the cam of forging a knife of being located at fixed part and produces pushing, thereby the arm of forging a knife is rotated, the pushing portion that is located at the arm the other end of forging a knife thus collides with the dish of forging a knife of being located at main shaft and it is pushed, thereby makes the cutter that is installed on the main shaft open.The cam of the forging a knife position that contacts with bearing on the arm of forging a knife is the inclined-plane, bigger contact angle makes and produces bigger impact when forging a knife cam and forging a knife arm contact, and rotate the pushing portion of the arm of forging a knife then and the dish of the forging a knife generation shock loading of colliding with the fixing speed drive arm of forging a knife.When adding snap-action speed for the minimizing tool change time, the shock loading of generation is bigger, and this impact makes the tool changing system wear sometimes, and the dust that wearing and tearing produce may cause the damage of main shaft bearing, and it is also quite serious to impact the noise pollution that forms simultaneously.

Summary of the invention

The utility model is at above deficiency, and the cam mechanism of forging a knife in a kind of cutter switch reasonable in design, simple in structure is provided, thereby reduces impact in the exchanging knives process by the optimization cam of forging a knife, and improves the service life and the tool changing efficient of lathe.

The technical scheme that its technical problem that solves the utility model adopts is:

The cam mechanism of forging a knife in a kind of cutter switch, comprise the main tapping on the lathe, described main tapping lower end connects cutter by tool-broaching mechanism, described main tapping upper end connects the arm of forging a knife by the dish of forging a knife, the other end of the described arm of forging a knife is connected with bearing, described bearing keeps in touch with the cam surface of the fixing cam of forging a knife, and at the cam surface place of the described cam of forging a knife, is disposed with the first cam face, the second cam face from the end of cam, the 3rd cam is facial and the four-cam face; The described first cam face, the second cam face, the 3rd cam face and the facial serial connection of four-cam constitute the cam surface of undulate.

Angle between the direction of motion of the first cam face, the 3rd cam face and described main tapping is less than the angle between the direction of motion of the described second cam face, four-cam face and described main tapping.

The cam mechanism of forging a knife in a kind of cutter switch of the present utility model, first cam on its cam surface is facial and the facial gradient of the 3rd cam is very mild, make the arm of forging a knife produce almost nil velocity of rotation, described second and the facial gradient of four-cam rise steeply, make the arm of forging a knife produce fast rotational.

The cam mechanism of forging a knife in a kind of cutter switch of the present utility model, it is by the linear cam surface with original cam of forging a knife, change four different cam faces of present angle of inclination into, the cam of forging a knife that this continuous curve surface constitutes, when making the constant fast moving of unit head, the arm of forging a knife produces different rotary speeies, has both avoided impact, realize the loose cutter action in the fixed journey system again, improved the stability and the tool changing efficient of tool changing system.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural front view of the cutter switch under the prior art;

Fig. 2 is the structural front view of the cam mechanism of forging a knife in a kind of cutter switch of the present utility model;

Fig. 3 is the structural representation of the cam of forging a knife of the cam mechanism of forging a knife in a kind of cutter switch of the present utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.

Provide a most preferred embodiment below:

The cam mechanism of forging a knife in a kind of cutter switch, comprise the main tapping 4 on the lathe, described main tapping 4 lower ends connect cutter 6 by tool-broaching mechanism 5, described main tapping 4 upper ends connect the arm 3 of forging a knife by the dish 8 of forging a knife, the described other end of forging a knife arm 3 is connected with bearing 2, described bearing 2 keeps in touch with the cam surface of the cam of fixing 1 of forging a knife, the cam surface place of the described cam 1 of forging a knife is disposed with the first cam face 71, the second cam face 72, the 3rd cam facial 73 and four-cam face 74, the described first cam face 71, angle between the direction of motion of the 3rd cam facial 73 and described main tapping 4 is less than the described second cam face 72, angle between the direction of motion of four-cam facial 74 and described main tapping 4.

When main tapping 4 rises, contact with the cam 1 of forging a knife of fixed position by the bearing 2 on the arm 3 of forging a knife, thereby the arm 3 of forging a knife is rotated.Arm 3 pushings of forging a knife are forged a knife and are coiled 8, unclamp controlling cutter 6 thereby drive tool-broaching mechanism 5.

As shown in Figure 3, forge a knife on the cam surface 7 of cam 1, from cam surface 7 leftmost sides, be that the minimum position of cam surface begins to be provided with in order first cam face 71, the second cam face 72, the 3rd cam facial 73 and four-cam face 74, the corrugated cam surface 7 of the first cam face 71, the second cam face 72, the 3rd cam facial 73 and the four-cam common formation of facial 74 serial connections, the facial gradient difference of each cam as seen from the figure.

When the bearing 2 on the arm 3 of forging a knife contacts with first cam facial 71,, thereby alleviated contact impact because gradient is very little.And the second cam face 72 of big gradient can make the arm 3 of forging a knife realize rapidly rotating, and makes arm 3 bottoms of forging a knife fast near the dish 8 of forging a knife.When dish 8 was forged a knife in contact soon, the bearing 2 of the arm 3 of forging a knife ran to the 3rd less cam face 73 of gradient, and feasible arm 3 rotations of forging a knife are slack-off, reduced contacting 8 o'clock the impact of dish of forging a knife.The four-cam face 74 that gradient is bigger can make that again finishing broaching tool system 5 in very short stroke unclamps controlling cutter 6.

Above-described embodiment, the utility model specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection domain of the present utility model.

Claims

1. the cam mechanism of forging a knife in the cutter switch, comprise the main tapping on the lathe, described main tapping lower end connects cutter by tool-broaching mechanism, described main tapping upper end connects the arm of forging a knife by the dish of forging a knife, the other end of the described arm of forging a knife is connected with bearing, described bearing keeps in touch with the cam surface of the cam of fixing of forging a knife, it is characterized in that, at the cam surface place of the described cam of forging a knife, be disposed with the first cam face, the second cam face from the end of cam, the 3rd cam is facial and the four-cam face; The described first cam face, the second cam face, the 3rd cam face and the facial serial connection of four-cam constitute the cam surface of undulate.

2. the cam mechanism of forging a knife in a kind of cutter switch according to claim 1, it is characterized in that the angle between the direction of motion of the described first cam face, the 3rd cam face and described main tapping is less than the angle between the direction of motion of the described second cam face, four-cam face and described main tapping.