A workpiece end surface supporting device for CNC lathe

Abstract

The invention discloses a workpiece end face supporting device for a numerically controlled lathe, comprising a main body, a chuck, a positioning sleeve and an elastic member, wherein the chuck is installed inside the main body, the positioning sleeve is movably connected to the main body, two ends of the elastic member respectively contact the main body and the positioning sleeve, the positioning sleeve is provided with a supporting end, the elastic member provides a supporting force to the supporting end, the supporting end of the positioning sleeve supports the workpiece to ensure the clamping rigidity of the workpiece, so as to ensure that the workpiece is subjected to uniform force, the workpiece processing accuracy is more stable, and the service life of the tool is improved; and the supporting mechanism and the motion mechanism are integrated to reduce the matching clearance and the cumulative error, so that the axial size accuracy of the workpiece is significantly improved.

Description

Technical Field

[0001] The invention relates to a numerically controlled lathe, in particular to a workpiece end surface supporting device for a numerically controlled lathe. Background Art

[0002] In the field of mechanical manufacturing, the lathe processing of grooves is often involved. In the prior art, a fixture is usually used to clamp one end of the workpiece, and the lathe processes the other end or side of the workpiece. However, the other end of the workpiece is suspended in the air, the workpiece clamping rigidity is poor, and the workpiece is easily deformed after being stressed, resulting in uneven stress on the workpiece. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, one of the objects of the present invention is to provide a workpiece end face supporting device for a CNC lathe, which can avoid poor workpiece clamping rigidity, deformation of the workpiece after being subjected to force, and uneven force on the workpiece.

[0004] One of the purposes of the present invention is achieved by the following technical solution:

[0005] A workpiece end face supporting device for a CNC lathe comprises a main body, a chuck, a positioning sleeve and an elastic member, wherein the chuck is installed inside the main body, the positioning sleeve is movably connected to the main body, two ends of the elastic member respectively contact the main body and the positioning sleeve, the positioning sleeve is provided with a supporting end, and the elastic member provides a supporting force to the supporting end.

[0006] Furthermore, the workpiece end face supporting device for the CNC lathe also includes a pressing sleeve, which is provided with a movable groove and a contact end, the contact end is located on one side of the movable groove, the pressing sleeve is fixedly connected to the main body, the end of the positioning sleeve is located in the movable groove, and when the elastic member provides supporting force to the supporting end, the end of the positioning sleeve contacts with the contact end.

[0007] Furthermore, the width of the movable groove is greater than the thickness of the end of the positioning sleeve.

[0008] Furthermore, the workpiece end surface supporting device for a CNC lathe also includes a top screw, the chuck is provided with a positioning groove, the top screw is installed on the main body and extends into the positioning groove to position the chuck circumferentially.

[0009] Furthermore, the workpiece end surface supporting device for a CNC lathe also includes a plug, which is installed on the positioning sleeve and corresponds to the position of the top screw.

[0010] Furthermore, the positioning sleeve is provided with a mounting groove, and the elastic member is located in the mounting groove.

[0011] Furthermore, the elastic member is a spring.

[0012] Furthermore, the workpiece end surface supporting device for a CNC lathe also includes an ejector pin, which is located inside the chuck and on the axis of the chuck.

[0013] Furthermore, the chuck is coaxial with the positioning sleeve.

[0014] Furthermore, the outer surface of the main body is cylindrical.

[0015] Compared with the prior art, the workpiece end face supporting device for a CNC lathe of the present invention also includes a chuck, a positioning sleeve and an elastic part. The chuck is installed inside the main body, the positioning sleeve is movably connected to the main body, the two ends of the elastic part are respectively in contact with the main body and the positioning sleeve, the positioning sleeve is provided with a supporting end, the elastic part provides a supporting force to the supporting end, and the supporting end of the positioning sleeve supports the workpiece to ensure the clamping rigidity of the workpiece, so as to ensure that the workpiece is subjected to uniform force, the workpiece processing accuracy is more stable, and the service life of the tool is improved; and the supporting mechanism and the motion mechanism are integrated to reduce the fitting clearance and cumulative error, so that the axial size accuracy of the workpiece is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a workpiece end surface supporting device for a CNC lathe of the present invention.

[0017] In the figure: 10, main body; 20, positioning sleeve; 21, supporting end; 22, mounting groove; 30, pressing sleeve; 31, movable groove; 32, contact end; 40, sealing ring; 50, elastic member; 60, chuck; 61, mounting hole; 70, jack screw; 80, plug; 90, ejector pin; 200, workpiece. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] See also Figure 1 , a workpiece end surface supporting device for a CNC lathe of the present invention is used for clamping a workpiece 200. The workpiece end surface supporting device for a CNC lathe comprises a main body 10, a positioning sleeve 20, a pressing sleeve 30, a sealing ring 40, an elastic member 50, a chuck 60, a top screw 70, a plug 80, and a top pin 90.

[0022] The main body 10 is fixed to the main shaft of the machine tool by screws. The outer surface of the main body 10 is cylindrical.

[0023] The positioning sleeve 20 is provided with a supporting end 21 and a mounting groove 22 .

[0024] The pressing sleeve 30 is provided with a movable groove 31 and an abutting end 32. The pressing sleeve 30 is fixed to the main body 10 by screws. The end of the positioning sleeve 20 is installed in the movable groove 31 and can move along the outer surface of the main body 10 in the movable groove 31.

[0025] The sealing ring 40 is installed between the pressing sleeve 30 and the positioning sleeve 20 to play a sealing role.

[0026] The elastic member 50 is an industrial spring and is installed in the installation slot 22 , with two ends of the elastic member 50 respectively contacting the main body 10 and the positioning sleeve 20 .

[0027] The chuck 60 is installed inside the main body 10. At this time, the chuck 60, the positioning sleeve 20 and the main body 10 are coaxial. The chuck 60 is provided with a mounting hole 61.

[0028] The top screw 70 is installed on the main body 10 and extends into the positioning groove of the chuck 60 to prevent the chuck 60 from rotating in the circumferential direction.

[0029] The plug 80 is installed on the positioning sleeve 20 and corresponds to the position of the top screw 70 .

[0030] The ejector pin 90 is mounted on the machine tool and is located in the mounting hole 61 of the chuck 60 .

[0031] When using the workpiece end surface supporting device for a CNC lathe, the workpiece 200 (in this embodiment, the valve) is pushed into the chuck 60 through the automatic feeding mechanism. During the pushing process, the end of the workpiece 200 presses the supporting end 21 of the positioning sleeve 20, so that the positioning sleeve 20 presses the elastic member 50, and the elastic member 50 is compressed to generate a reaction force, which is applied to the supporting end 21, and the supporting end 21 supports the workpiece 200. When the axial positioning surface of the workpiece 200 contacts the ejector pin 90 inside the machine tool. The push cylinder stops moving, the machine tool receives the feeding completion signal, the hydraulic cylinder drives the pull rod, and the chuck 60 clamps the workpiece.

[0032] Through the above design, before the chuck 60 clamps, the support end 21 first supports the workpiece 200 to ensure the clamping rigidity of the workpiece 200, so that the workpiece 200 is evenly stressed, the workpiece 200 processing accuracy is more stable, and the tool life is improved; and the support mechanism and the motion mechanism are integrated to reduce the matching clearance and cumulative error, so that the axial dimensional accuracy of the workpiece 200 is significantly improved. The positioning sleeve 20 guide adopts the outer cylindrical guide of the main body 10, the guide part accuracy is adjustable and controllable, and it is easy to grind and manufacture; adopting the outer cylindrical guide of the main body 10, the clamping rigidity and the stability of the fixture are enhanced, and the support force is stable each time. The main body 10 and the pressure sleeve 30 form a limit device, which can limit the axial displacement of the positioning sleeve 20, thereby protecting the elastic member 50.

[0033] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A workpiece end surface supporting device for a CNC lathe, comprising a main body, characterized in that: The workpiece end face supporting device for the CNC lathe also includes a chuck, a positioning sleeve and an elastic member, the chuck is installed inside the main body, the positioning sleeve is movably connected to the main body, the two ends of the elastic member respectively contact with the main body and the positioning sleeve, the positioning sleeve is provided with a supporting end, and the elastic member provides a supporting force to the supporting end, the workpiece end face supporting device for the CNC lathe also includes a pressing sleeve, the pressing sleeve is provided with a movable groove and a contact end, the contact end is located on one side of the movable groove, the pressing sleeve is fixedly connected to the main body, the end of the positioning sleeve is located in the movable groove, and when the elastic member provides a supporting force to the supporting end, the end of the positioning sleeve contacts with the contact end.

2. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The width of the movable groove is greater than the thickness of the end of the positioning sleeve.

3. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The workpiece end surface supporting device for a numerically controlled lathe further comprises a top screw, the chuck is provided with a positioning groove, the top screw is installed on the main body and extends into the positioning groove to position the chuck circumferentially.

4. The workpiece end surface supporting device for a CNC lathe according to claim 3, characterized in that: The workpiece end surface supporting device for a numerically controlled lathe further comprises a plug, which is mounted on the positioning sleeve and corresponds to the position of the top screw.

5. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The positioning sleeve is provided with a mounting groove, and the elastic member is located in the mounting groove.

6. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The elastic member is a spring.

7. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The workpiece end surface supporting device for a numerically controlled lathe further comprises an ejector pin, which is located inside the chuck and on the axis of the chuck.

8. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The chuck is coaxial with the positioning sleeve.

9. The workpiece end surface supporting device for a CNC lathe according to claim 1, characterized in that: The outer surface of the main body is cylindrical.

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