Numerical control turning length positioning device

Abstract

The utility model discloses a numerical control turning length positioning device, include: rotary oil cylinder, draw tube, one end is connected in the piston of rotary oil cylinder, hydraulic chuck, it is spaced apart with rotary oil cylinder, wherein, the other end of draw tube is connected in hydraulic chuck, rotary oil cylinder can drive draw tube reciprocating motion along the axial, make hydraulic chuck clamping or loosening, positioning flange, it is fixedly installed on the casing of rotary oil cylinder, wherein, positioning flange and draw tube are located at both ends of rotary oil cylinder respectively, positioning rod, it is along the axial setting of draw tube, one end of positioning rod is connected on positioning flange through screw thread, and the other end extends to draw tube, ball, it is installed on the end face of one end of positioning rod in draw tube, wherein, workpiece sets up in hydraulic chuck, one end of workpiece to be turned is located in the outside of hydraulic chuck, and the other end extends to draw tube and leans on the ball, the numerical control turning length positioning device provided by the utility model can avoid workpiece bounce in the turning process.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece positioning technology for turning, and specifically relates to a CNC turning length positioning device. Background Technology

[0002] When turning a workpiece, it needs to rotate synchronously with the spindle of the turning machine under the drive of the chuck. Currently, the locating end face of the workpiece and the end of the locating rod are in direct contact. Due to the inaccuracy of the locating flange and the locating rod, the workpiece may not be concentric during rotation, resulting in runout, which affects the machining accuracy of the turned workpiece. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a CNC turning length positioning device that can ensure the free rotation of the workpiece during the turning process and prevent the workpiece from jumping.

[0004] The technical solution provided by this utility model is as follows:

[0005] A CNC turning length positioning device, comprising:

[0006] Rotary hydraulic cylinder;

[0007] A pull tube, one end of which is connected to the piston of the rotary cylinder;

[0008] A hydraulic chuck, which is spaced apart from the rotary cylinder;

[0009] The other end of the pull tube is connected to the hydraulic chuck; the rotary cylinder can drive the pull tube to reciprocate along the axial direction, so that the hydraulic chuck clamps or releases.

[0010] A positioning flange is fixedly installed on the housing of the rotary cylinder;

[0011] The positioning flange and the pull tube are located at both ends of the rotary cylinder, respectively.

[0012] A positioning rod is provided along the axial direction of the pull tube; one end of the positioning rod is threadedly connected to the positioning flange, and the other end extends into the pull tube;

[0013] A ball bearing is mounted on the end face of the positioning rod located inside the pull tube;

[0014] The workpiece is placed in the hydraulic chuck; one end of the workpiece to be turned is located outside the hydraulic chuck, and the other end extends into the pull tube and abuts against the ball bearing.

[0015] Preferably, a locking nut is installed on the end of the positioning rod located outside the positioning flange.

[0016] Preferably, the positioning flange is fixedly mounted on the housing of the rotary cylinder by a plurality of bolts.

[0017] Preferably, the positioning rod, the positioning flange, and the pull tube are arranged coaxially.

[0018] Preferably, the CNC turning length positioning device further includes:

[0019] A support sleeve is coaxially fixedly mounted on the positioning rod;

[0020] The outer ring of the support sleeve is supported on the inner wall of the tube.

[0021] Preferably, the support sleeve is positioned near the end of the positioning rod where the ball bearing is mounted.

[0022] Preferably, the ball bearings are bullseye ball bearings.

[0023] Preferably, the hydraulic chuck is a three-jaw chuck.

[0024] The beneficial effects of this utility model are:

[0025] The CNC turning length positioning device provided by this utility model can ensure the free rotation of the workpiece during the turning process and avoid the workpiece jumping. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the CNC turning length positioning device described in this utility model.

[0027] Figure 2 This is a schematic diagram of the internal structure of the CNC turning length positioning device described in this utility model.

[0028] Figure 3 This is a front view of the CNC turning length positioning device described in this utility model.

[0029] Figure 4 This is a rear view of the CNC turning length positioning device described in this utility model.

[0030] Figure 5 This is a right view of the CNC turning length positioning device described in this utility model. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0032] like Figure 1-5As shown, this utility model provides a CNC turning length positioning device, which includes: a rotary cylinder 110, a pull tube 120, a hydraulic chuck 130, a positioning flange 140, a positioning rod 150, and a ball bearing 160.

[0033] One end of the pull tube 120 is threadedly connected to the piston of the rotary cylinder 110. The hydraulic chuck 130 is spaced apart from the rotary cylinder 110; the other end of the pull tube 120 is threadedly connected to the hydraulic chuck 130. The rotary cylinder 110 can drive the pull tube 120 to reciprocate axially, causing the hydraulic chuck 130 to clamp or release.

[0034] In this embodiment, the hydraulic chuck 130 is a three-jaw chuck.

[0035] The positioning flange 140 is a cylindrical shape with one end closed, and is fixedly installed on the housing of the rotary cylinder 110. The positioning flange 140 and the pull tube 140 are located at the two ends of the rotary cylinder 110, respectively; the open end of the positioning flange 140 abuts against the housing of the rotary flange 110 and is fixedly connected to the housing of the rotary cylinder 110 by multiple bolts 141.

[0036] The positioning rod 150 is arranged axially along the tube 120. One end of the positioning rod 150 is threaded to the positioning flange 140, and the other end extends into the cavity of the tube 120. A ball bearing 160 is mounted on the end face of the positioning rod 150 located in the cavity of the tube 120.

[0037] As a preferred option, the ball bearing 160 is a bullseye ball bearing, which is embedded in the center of the end of the positioning rod 150 via a ball bearing seat. Using bullseye balls ensures more stable load-bearing capacity.

[0038] The workpiece 200 is clamped in the hydraulic chuck 130; one end of the workpiece 200 to be turned is located outside the hydraulic chuck 130, and the other end extends through the hydraulic chuck 130 into the cavity of the pull tube 120, and the end face (positioning surface) of the workpiece 200 abuts against the ball 160.

[0039] A locking nut 170 is installed on one end of the positioning rod 150 outside the positioning flange 140. By changing the position of the locking nut 170 in the axial direction of the positioning rod 150, the length of the positioning rod 150 extending into the pull tube 120 can be adjusted, thereby changing the positioning length of the workpiece 200 to be machined.

[0040] The positioning rod 150, positioning flange 140 and pull tube 120 are coaxially arranged to ensure the stability of the entire system during the turning rotation of the workpiece 200.

[0041] As a preferred embodiment, the CNC turning length positioning device further includes: a support sleeve 180, the inner ring of which is coaxially fixedly mounted on the positioning rod 150; the outer ring of the support sleeve 180 is supported on the inner wall of the drawing tube 120. The support sleeve 180 is positioned near the end of the positioning rod 150 where the ball bearing 160 is mounted. By providing the support sleeve 180, the positioning rod 150 can be stably supported, preventing displacement of the positioning rod 150 and thus further improving the machining accuracy of the workpiece.

[0042] In practical use, the hydraulic chuck is fixedly connected to the front end of the spindle of the turning machine tool. The pull tube passes through the spindle cavity of the turning machine tool, and the piston of the rotary cylinder is fixedly installed at the rear end of the spindle of the turning machine tool. During operation, the hydraulic chuck, pull tube, and piston of the rotary cylinder rotate synchronously. The housing of the rotary cylinder is fixed and does not rotate with the spindle, so the positioning rod does not rotate. The workpiece rotates with the hydraulic chuck and contacts the ball bearings at the end of the positioning rod, thus allowing it to rotate freely relative to the positioning rod without jumping.

[0043] The CNC turning length positioning device provided by this utility model can ensure the free rotation of the workpiece during the turning process, avoid the workpiece jumping, and thus improve the turning accuracy of the workpiece.

[0044] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A CNC turning length positioning device, characterized in that, include: Rotary hydraulic cylinder; A pull tube, one end of which is connected to the piston of the rotary cylinder; A hydraulic chuck, which is spaced apart from the rotary cylinder; The other end of the pull tube is connected to the hydraulic chuck; the rotary cylinder can drive the pull tube to reciprocate along the axial direction, so that the hydraulic chuck clamps or releases. A positioning flange is fixedly installed on the housing of the rotary cylinder; The positioning flange and the pull tube are located at both ends of the rotary cylinder, respectively. A positioning rod is provided along the axial direction of the pull tube; one end of the positioning rod is threadedly connected to the positioning flange, and the other end extends into the pull tube; A ball bearing is mounted on the end face of the positioning rod located inside the pull tube; The workpiece is placed in the hydraulic chuck; one end of the workpiece to be turned is located outside the hydraulic chuck, and the other end extends into the pull tube and abuts against the ball bearing.

2. The CNC turning length positioning device according to claim 1, characterized in that, A locking nut is installed on one end of the positioning rod located outside the positioning flange.

3. The CNC turning length positioning device according to claim 2, characterized in that, The positioning flange is fixedly mounted on the housing of the rotary cylinder by multiple bolts.

4. The CNC turning length positioning device according to any one of claims 1-3, characterized in that, The positioning rod, the positioning flange, and the pull tube are arranged coaxially.

5. The CNC turning length positioning device according to claim 4, characterized in that, Also includes: A support sleeve is coaxially fixedly mounted on the positioning rod; The outer ring of the support sleeve is supported on the inner wall of the tube.

6. The CNC turning length positioning device according to claim 5, characterized in that, The support sleeve is located near the end of the positioning rod where the ball bearing is installed.

7. The CNC turning length positioning device according to claim 6, characterized in that, The ball bearings are bullseye ball bearings.

8. The CNC turning length positioning device according to claim 7, characterized in that, The hydraulic chuck is a three-jaw chuck.

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