CN211803857U

CN211803857U - Machine tool tip protection device with diameter compensation effect

Info

Publication number: CN211803857U
Application number: CN201921943290.8U
Authority: CN
Inventors: 江海滨; 齐勇; 张凯凯; 谢德鹏
Original assignee: Anqing CSSC Diesel Engine Co Ltd
Current assignee: Anqing CSSC Diesel Engine Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-10-30
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to a top protection device of lathe with diameter compensation effect, including locating the protection machanism between camshaft and the lathe top, protection machanism includes top protective sheath and spring expansion sleeve, and top protective sheath is located the spring expansion sleeve, and the external diameter of spring expansion sleeve is the same with the central oilhole diameter of camshaft, and the interior hole face tapering of spring expansion sleeve is 1:10, is equipped with the clearance that rises on the spring expansion sleeve, and the one end of spring expansion sleeve is equipped with spacing border, and top protective sheath is the cavity circular platform body, is equipped with the inner taper hole in the one end of top protective sheath, and the conical surface gradient of inner taper hole is 60, and the tapering of the outer conical surface of top protective sheath is 1: 10. This top protection device of lathe with diameter compensation effect, the device simple to operate has the diameter compensation function and can reduce the requirement to oilhole diameter tolerance, and it is top to have effectual protection lathe simultaneously, prolongs top life, guarantees the processingquality of diesel engine camshaft.

Description

Machine tool tip protection device with diameter compensation effect

Technical Field

The utility model belongs to diesel engine camshaft lathe processing field, concretely relates to top protection device of lathe with diameter compensation effect.

Background

After the deep oil hole at the shaft center is processed in the deep oil hole special machine process, the eccentric phenomenon exists at the oil hole center and the excircle, the excircle must be processed again, in order to unify the processing reference, the central oil hole needs to be tightly propped, and the orifice is not chamfered at the moment, so that the damage to the top of the machine tool is caused, the processing quality of the diesel engine camshaft is influenced, and the manufacturing cost is inevitably increased if one extra chamfering process is added.

And the diameter tolerance of the oil hole on the camshaft is generally about +/-0.3 mm, the device not only needs to protect the top of the machine tool, but also needs to have an automatic compensation function, eliminates the gap between the device and the workpiece and prevents the influence on the positioning of the workpiece during processing, so that the device which can not only automatically align the center of the oil hole but also can effectively protect the top of the machine tool needs to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, reasonable in design's top protection device of lathe that has the diameter compensation effect just for solving above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the machine tool center protection device with the diameter compensation effect comprises a protection mechanism arranged between a cam shaft and a machine tool center, wherein the protection mechanism comprises a center protection sleeve and a spring expansion sleeve, and the center protection sleeve is located in the spring expansion sleeve.

As a further optimization scheme of the utility model, the outer diameter of the spring expansion sleeve is the same as the diameter of the central oil hole of the camshaft, and the taper of the inner hole surface of the spring expansion sleeve is 1: 10.

As a further optimization scheme of the utility model, be equipped with the clearance of rising on the spring cover that rises, the one end that the spring cover that rises is equipped with spacing border.

As a further optimization scheme of the utility model, top protective sheath is the cavity round platform body, be equipped with interior taper hole in the one end of top protective sheath, interior taper hole's conical surface gradient is 60.

As a further optimization scheme of the utility model, the taper of the outer circular conical surface of the tip protection sleeve is 1: 10.

The beneficial effects of the utility model reside in that:

1) the center protective sleeve and the spring expansion sleeve are matched for use, when the machine tool center expansion sleeve is used, the center protective sleeve is placed into the spring expansion sleeve, the outer conical surface of the center protective sleeve can be tightly attached to the inner conical surface of the spring expansion sleeve to realize fixing and limiting, then the spring expansion sleeve is placed into the oil hole of the camshaft, the machine tool center pushes the inner conical hole in the center protective sleeve, the center protective sleeve gradually transmits force to the spring expansion sleeve after receiving the axial pressure of the machine tool center, the spring expansion sleeve is expanded outwards from the gap after being stressed until being completely attached to the oil hole, and the machine tool center pushes a workpiece tightly when being tightly attached;

2) the utility model has convenient installation, diameter compensation effect, diameter tolerance range of the oil hole of +/-0.3 mm, can reduce the requirement on the diameter tolerance of the oil hole, and can effectively protect the top of the machine tool, prolong the service life of the top and ensure the processing quality of the camshaft of the diesel engine;

3) the utility model discloses simple structure, stability is high, reasonable in design, the realization of being convenient for.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the spring expansion sleeve of the present invention;

fig. 3 is a schematic structural view of the middle tip protective sleeve of the present invention.

In the figure: 1. a tip protecting sleeve; 2. a spring expansion sleeve; 3. a camshaft; 4. the machine tool center.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1-3, the machine tool center protection device with the diameter compensation effect comprises a protection mechanism arranged between a camshaft 3 and a machine tool center 4, wherein the protection mechanism comprises a center protection sleeve 1 and a spring expansion sleeve 2, and the center protection sleeve 1 is positioned in the spring expansion sleeve 2;

the outer diameter of the spring expansion sleeve 2 is the same as the diameter of a central oil hole of the camshaft 3, the taper of the inner hole surface of the spring expansion sleeve 2 is 1:10, the diameter tolerance range of the central oil hole is +/-0.3 mm, and the outer diameter of the spring expansion sleeve 2 is the same as the diameter of a central deep oil hole of the camshaft 3 under the condition of no deformation;

the spring expansion sleeve 2 is provided with an expansion gap which is uniformly and symmetrically arranged on the spring expansion sleeve 2, one end of the spring expansion sleeve 2 is provided with a limiting edge, the limiting edge is also provided with the expansion gap, and the expansion gap is used for ensuring that the spring expansion sleeve 2 can expand outwards from the gap after being stressed, so that the spring expansion sleeve 2 can deform to a certain degree to better adapt to the diameter tolerance of an oil hole, no gap exists between a device and a workpiece, and the positioning and jacking effects are more stable;

the tip protection sleeve 1 is a hollow circular truncated cone, an inner taper hole is formed in one end of the tip protection sleeve 1, the inclination of the conical surface of the inner taper hole is 60 degrees, the inner taper hole can enable the machine tool tip 4 to be more stable and attached when being pushed into the tip protection sleeve 1, and the matching between the machine tool tip 4 and the tip protection sleeve 1 is more stable;

the taper of the outer conical surface of the tip protection sleeve 1 is 1:10, so that the outer conical surface of the tip protection sleeve 1 can be tightly attached to the inner conical surface of the spring expansion sleeve 2, the contact area is increased, the interaction force generated between the tip protection sleeve and the spring expansion sleeve is increased, and the matching is more stable.

It should be noted that, the tip protection sleeve 1 and the spring expansion sleeve 2 are used in cooperation, when in use, the tip protection sleeve 1 is placed into the spring expansion sleeve 2, the outer conical surface of the tip protection sleeve 1 can be tightly attached to the inner conical surface of the spring expansion sleeve 2 to realize fixed limiting, then the spring expansion sleeve 2 is placed into an oil hole of the camshaft 3, the machine tool tip 4 is pushed into the inner conical hole in the tip protection sleeve 1, the tip protection sleeve 1 gradually transmits force to the spring expansion sleeve 2 after receiving the axial pressure of the machine tool tip 4, the spring expansion sleeve 2 begins to expand outwards from the gap after being stressed until being completely attached to the oil hole, when being tightly attached, the machine tool tip 4 already pushes a workpiece tightly, the installation and the disassembly between the spring expansion sleeve 2 and the tip protection sleeve 1 are convenient, the diameter compensation effect is achieved, the diameter tolerance range of the oil hole is +/-0.3 mm, the requirement on the diameter tolerance of the oil hole can be reduced, meanwhile, the center 4 of the machine tool can be effectively protected, the service life of the center is prolonged, and the processing quality of the camshaft 3 of the diesel engine is guaranteed.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a top protection device of lathe with diameter compensation effect, is including locating the protection machanism between camshaft (3) and lathe top (4), its characterized in that: the protection mechanism comprises a tip protection sleeve (1) and a spring expansion sleeve (2), and the tip protection sleeve (1) is located in the spring expansion sleeve (2).

2. The protection device for a machine tool center having a diameter compensation effect according to claim 1, wherein: the outer diameter of the spring expansion sleeve (2) is the same as the diameter of a central oil hole of the camshaft (3), and the taper of the inner hole surface of the spring expansion sleeve (2) is 1: 10.

3. The protection device for a machine tool center having a diameter compensation effect according to claim 2, wherein: an expansion gap is arranged on the spring expansion sleeve (2), and a limiting edge is arranged at one end of the spring expansion sleeve (2).

4. The protection device for a machine tool center having a diameter compensation effect according to claim 1, wherein: the tip protection sleeve (1) is a hollow circular truncated cone, an inner taper hole is formed in one end of the tip protection sleeve (1), and the inclination of the conical surface of the inner taper hole is 60 degrees.

5. The protection device for a machine tool center having a diameter compensation effect according to claim 4, wherein: the taper of the outer conical surface of the tip protective sleeve (1) is 1: 10.