Coaxial precision measuring device for lathe center frame

Abstract

A lathe center frame coaxial precision measuring device belongs to the technical field of machine tools and comprises a lathe, a chuck, an adjusting sleeve, a detection rod, a center frame, a tail frame and a detection device, the chuck is in transmission connection with a spindle of the lathe, the adjusting sleeve is fixedly connected with the chuck, one end of the detection rod extends into the adjusting sleeve, the detection rod is located between the chuck and the tail frame, and the center frame is installed on the lathe. The center frame is located between the chuck and the tail frame and corresponds to the detection rod, and the detection device is movably installed on the lathe. The utility model has the beneficial effects that when the adjusting sleeve is arranged to calibrate the detection rod and measure the precision of the center frame, the adjusting sleeve and the center frame support the detection rod, the influence of a tail frame in the detection process is eliminated, the coaxial precision of the lathe spindle and the center frame can be measured through visual metering, and the measurement is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a coaxial precision measuring device for a lathe center rest. Background Art

[0002] Before machining parts on a CNC lathe, it is generally necessary to calibrate the fixture of the lathe. The traditional device installs centers on the spindle taper hole and the tailstock taper hole respectively. After using the centers of the spindle and the tailstock to tighten the two ends of the inspection bar, the center rest clamps the inspection bar, then locks the fixing screw of the center rest, and the tip of the dial indicator is placed near the clamping position of the inspection bar on the center rest. Clamp and loosen the center rest to observe the change of the pointer to measure the coaxial precision of the center rest.

[0003] Under the traditional technology, the precision of the center rest is easily affected by the tailstock. The tailstock pressing position and pressing force will affect the measurement of the coaxial precision between the lathe spindle and the center rest. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a coaxial precision measuring device for a lathe center rest, and its technical solution is as follows.

[0005] A coaxial precision measuring device for a lathe center rest includes a lathe, a chuck, an adjusting sleeve, an inspection bar, a center rest, a tailstock and a detection device. The chuck is in transmission connection with the spindle of the lathe. The adjusting sleeve is fixedly connected with the chuck. One end of the inspection bar extends into the adjusting sleeve. The inspection bar is located between the chuck and the tailstock. The center rest is installed on the lathe. The center rest is located between the chuck and the tailstock. The center rest is arranged corresponding to the inspection bar. The detection device is movably installed on the lathe.

[0006] Further, the adjusting sleeve is provided with adjusting screws. The number of the adjusting screws is multiple, and the multiple adjusting screws are circumferentially arranged.

[0007] Further, the number of the multiple adjusting screws is an even number.

[0008] Further, the moving direction of the tailstock is parallel to the extending direction of the inspection bar.

[0009] Further, the tailstock is provided with a tip portion. The tip portion is conical. The other end of the inspection bar is provided with a tapered groove. The tip portion and the tapered groove are matched.

[0010] Further, the center rest includes a driving part and a jaw. The driving part is installed on the lathe. The jaw is in transmission connection with the driving part.

[0011] Further, the center rest further includes a fixing screw. The fixing screw locks the jaw.

[0012] Further, the steady rest is also provided with an adjusting screw for adjusting the movement of the steady rest.

[0013] Further, a roller is rotatably connected to the tip of the jaw.

[0014] Further, the detection device is a dial indicator.

[0015] The beneficial effect of the present utility model is that: by providing the adjusting sleeve to calibrate the inspection rod, when measuring the accuracy of the steady rest, the adjusting sleeve and the steady rest support the inspection rod, excluding the influence of the tailstock during the detection process, and the coaxial accuracy between the lathe spindle and the steady rest can be measured directly by dial indicator, making the measurement more accurate. Description of the Drawings

[0016] Figure 1 is the front view of the coaxial accuracy measuring device of the steady rest for lathe of the present utility model.

[0017] Figure 2 is Figure 1 the three-dimensional view of the coaxial accuracy measuring device of the steady rest for lathe of

[0018] In the figure: 1, lathe; 2, chuck; 3, adjusting sleeve; 31, adjusting screw; 4, inspection rod; 5, steady rest; 51, driving part; 52, jaw; 521, roller; 6, tailstock; 61, tip part. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

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

[0021] Next, the present utility model will be further described in detail with reference to the embodiments and the attached Figure 1-2 drawings.

[0022] A coaxial accuracy measuring device for a lathe steady rest includes a lathe 1, a chuck 2, an adjusting sleeve 3, an inspection rod 4, a steady rest 5, a tailstock 6 and a dial indicator.

[0023] Conical grooves are provided at both ends of the inspection rod 4.

[0024] The adjustment sleeve 3 is provided with a plurality of adjustment screws 31 . Specifically, in this embodiment, the number of the adjustment screws 31 is an even number, so that the plurality of adjustment screws 31 are symmetrical about the axis.

[0025] The center frame 5 includes a driving part 51 and a clamping jaw 52. The driving part 51 and the clamping jaw 52 are connected to control the opening and closing of the clamping jaw 52. The tip of the clamping jaw 52 is provided with a roller 521, which is rotatably mounted on the clamping jaw 52. The roller 521 protects the inspection rod 4 from damage and provides a better clamping effect. Specifically, in this embodiment, the center frame 5 is provided with a fixing screw for locking the clamping jaw 52, and the center frame 5 is provided with an adjusting screw for adjusting the movement of the center frame 5.

[0026] The tailstock 6 is provided with a top portion 61 , and the top portion 61 is tapered.

[0027] The utility model discloses a structural relationship of a coaxial precision measuring device for a lathe center frame.

[0028] The chuck 2 is connected to the main shaft of the lathe 1 by transmission, the adjustment sleeve 3 is fixedly connected to the chuck 2, and the tailstock 6 is slidably installed on the lathe 1. The sliding direction of the tailstock 6 is parallel to the extension direction of the check rod 4. One end of the check rod 4 extends into the adjustment sleeve 3 and is fixed by the adjustment screw 31. The other end of the check rod 4 cooperates with the top portion 61 to tighten the check rod 4. The center frame 5 is located between the chuck 2 and the tailstock 6. The clamping claw 52 selectively grasps the check rod 4 under the drive of the driving part 51, and the micrometer is moved. The tip of the micrometer hits the check rod 4, and the tip of the micrometer is close to the clamping position of the center frame 5.

[0029] Working principle of the coaxial precision measuring device of the lathe center frame.

[0030] 1. Calibrate the test rod 4.

[0031] Install the adjusting sleeve 3, extend one end of the testing rod 4 into the adjusting sleeve 3, and the other end is tightened by the top part 61 of the tailstock 6. The needle of the micrometer is pressed on the main shaft end of the testing rod 4, adjust the needle to zero, slowly rotate the chuck 2 to drive the testing rod 4 to rotate slowly, observe the micrometer reading, and when the micrometer is increased, slightly loosen the adjusting screw 31 opposite to the position where the needle on the adjusting sleeve 3 is pointed, and at the same time tighten the adjusting screw 31 on the adjusting sleeve 3 near the needle until the needle changes within 0.002mm.

[0032] 2. Measure and adjust the center frame 5 accuracy.

[0033] The direction in which the probe 4 extends is defined as the Z axis.

[0034] Keep the dial indicator base stationary. Near the spindle end of the test bar 4 in the XZ plane of the dial indicator, adjust the pointer to "0". Move the dial indicator closer to the clamping position of the steady rest 5, loosen the fixing screw of the steady rest 5, operate the jaws 52 to clamp the test bar 4, then lock the jaws 52 through the fixing screw, remove the tailstock 6, observe the pointer reading. When adding the dial indicator, adjust the adjusting screw of the steady rest 5 to move the whole steady rest 5 along the negative Y-axis until the pointer indication returns to "0"; when subtracting the dial indicator, adjust the adjusting screw of the steady rest 5 to move the whole steady rest 5 along the positive Y-axis until the pointer reading returns to "0".

[0035] Keep the dial indicator base stationary. Near the spindle end of the test bar 4 in the YZ plane of the dial indicator, adjust the pointer to "0". Move the dial indicator closer to the clamping position of the steady rest 5, loosen the fixing screw of the steady rest 5, operate the jaws 52 to clamp the test bar 4, then lock the jaws 52 through the fixing screw, remove the tailstock 6, observe the pointer reading. When adding the dial indicator, adjust the adjusting screw of the steady rest 5 to move the whole steady rest 5 along the negative X-axis until the pointer indication returns to "0"; when subtracting the dial indicator, adjust the adjusting screw of the steady rest 5 to move the whole steady rest 5 along the positive X-axis until the pointer reading returns to "0".

[0036] Repeat the above operations until the numerical change of the dial indicator in the XZ plane and the YZ plane is within 0.005. After moving the dial indicator to the clamping position of the steady rest 5, lock and tighten the steady rest 5 and observe the dial indicator reading. At this time, the dial indicator reading does not change. If the dial indicator changes, move the position of the steady rest 5 according to the above operations for calibration.

[0037] The beneficial effect of the present utility model is that by providing the adjusting sleeve 3 to calibrate the test bar 4, when measuring the accuracy of the steady rest 5, the adjusting sleeve 3 and the steady rest 5 support the test bar 4, eliminating the influence of the tailstock 6 during the detection process, and the coaxial accuracy between the lathe spindle and the steady rest 5 can be directly measured by dial indicator, and the measurement is more accurate.

[0038] The above embodiments only represent one implementation mode of the present utility model, but should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can be made. These are all equivalent modifications and evolutions based on the essence of the present utility model to the above embodiments, and all belong to the protection scope of the present utility model.

Claims

1. A coaxial accuracy measuring device for a lathe center rest, comprising a lathe, characterized in that: It further includes a chuck, an adjusting sleeve, a checking rod, a steady rest, a tailstock and a detecting device. The chuck is in driving connection with the main shaft of the lathe. The adjusting sleeve is fixedly connected with the chuck. One end of the checking rod extends into the adjusting sleeve. The checking rod is located between the chuck and the tailstock. The steady rest is installed on the lathe and is located between the chuck and the tailstock. The steady rest is arranged corresponding to the checking rod. The detecting device is movably installed on the lathe.

2. The coaxial accuracy measuring device for the lathe steady rest according to claim 1, wherein: The adjusting sleeve is provided with adjusting screws. The number of the adjusting screws is multiple, and the multiple adjusting screws are circumferentially arranged.

3. The coaxial accuracy measuring device for the lathe steady rest according to claim 1, characterized in that: The number of the multiple adjusting screws is even.

4. The coaxial accuracy measuring device for the lathe steady rest according to claim 1, wherein: The moving direction of the tailstock is parallel to the extending direction of the checking rod.

5. The coaxial accuracy measuring device for the lathe center rest according to claim 4, wherein: The tailstock is provided with a tip part. The tip part is conical. The other end of the checking rod is provided with a tapered groove. The tip part and the tapered groove are matched.

6. The coaxial accuracy measuring device for the lathe steady rest according to claim 1, wherein: The steady rest includes a driving part and a jaw. The driving part is installed on the lathe. The jaw is in driving connection with the driving part.

7. The coaxial accuracy measuring device for the lathe steady rest according to claim 6, characterized in that: The steady rest further includes fixing screws for locking the jaw.

8. The coaxial accuracy measuring device for the lathe steady rest according to claim 6, characterized in that: The steady rest is further provided with adjusting screws for adjusting the movement of the steady rest.

9. The coaxial accuracy measuring device for a lathe steady rest according to claim 6, wherein: The tip of the jaw is provided with a rotatably connected roller.

10. The coaxial accuracy measuring device for the lathe steady rest according to claim 1, wherein: The detecting device is a dial indicator.

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