Contour detection device

Abstract

The utility model discloses a contour detection device, which comprises a lathe bed, a processing device and a measuring device, the lathe bed comprises an X-direction sliding plate and a Z-direction sliding plate, the Z-direction sliding plate is provided with a workpiece main shaft capable of performing C-axis rotation, the measuring device is arranged on one side of the processing device, and the measuring device comprises a probe and a driving device capable of providing torque for the probe. The top of the probe is provided with the detection ball, and the driving device can drive the probe to rotate around the B2 axis, so that the thread contour and the pitch diameter of the internal thread can be respectively detected through the measuring device, the secondary clamping error is avoided, and the subsequent processing precision and the production efficiency are further improved.

Description

Technical Field

[0001] The utility model belongs to the field of contour detection devices, and more specifically relates to a contour detection device. Background Art

[0002] With the rapid development of the machinery industry, threaded components such as screws and nuts have become critical components. To meet the demands for higher efficiency and precision, thread grinders, as key processing equipment, need to develop towards intelligent and integrated features. Measuring workpieces, feeding that data back to the machine tool, and enabling timely adjustments have become key components of thread grinder intelligence.

[0003] The commonly used method involves installing a probe on the thread grinder. However, this probe is only used for workpiece tool setting and cannot measure geometric parameters such as the workpiece's profile and diameter. If this data is desired, the workpiece must be disassembled after machining and placed on a measuring device such as a profilometer. After measurement, the workpiece must be reinstalled on the machine tool, and machining adjustments can be made based on the measured data. However, this method introduces secondary clamping errors and requires manual operation, making it impossible to achieve automatic measurement. Utility Model Content

[0004] The main purpose of the utility model is to provide a contour detection device, which can respectively detect the thread contour and the internal thread pitch diameter, avoid secondary clamping errors and improve processing accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is:

[0006] A contour detection device includes a bed, a processing device and a measuring device. The bed includes an X-axis slide and a Z-axis slide. The Z-axis slide is provided with a workpiece spindle that can rotate along the C-axis. The X-axis slide is provided with a processing device. The measuring device is arranged on one side of the processing device. The measuring device can be used to detect the thread profile and the internal thread diameter respectively. The measuring device includes a probe and a driving device that can provide torque to the probe. A detection ball is provided on the top of the probe. The driving device can drive the probe to rotate around the B2 axis.

[0007] In a specific embodiment of the present invention, the measuring device further comprises two correspondingly arranged tips.

[0008] In a specific embodiment of the present invention, the processing device includes a column and a first processing axis and a second processing axis that can respectively perform swing angle processing.

[0009] In a specific embodiment of the present invention, a first drive assembly and a second drive assembly are respectively provided on the column, and the first processing axis and the second processing axis can automatically swing under the action of the first drive assembly and the second drive assembly respectively.

[0010] In a specific embodiment of the present invention, the bed further includes a first transmission mechanism and a second transmission mechanism for driving the X-direction slide and the Z-direction slide.

[0011] In a specific embodiment of the present invention, a dresser device is provided on the side of the workpiece spindle.

[0012] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0013] The utility model arranges a workpiece spindle capable of C-axis rotation on the Z-axis slide, and arranges a measuring device on one side of the processing device. The measuring device detects the thread profile and the inner thread diameter respectively, thereby avoiding secondary clamping errors and further improving subsequent processing accuracy and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Attachment Figure 1 This is an overall structural diagram of an embodiment of the utility model;

[0016] Attachment Figure 2 This is a structural diagram from another perspective of an embodiment of the present utility model;

[0017] Attachment Figure 3 This is a schematic diagram of the thread profile measurement principle of an embodiment of the utility model;

[0018] Attachment Figure 4 The internal thread diameter measurement principle of an embodiment of the utility model Figure 1 ;

[0019] Attachment Figure 5 The internal thread diameter measurement principle of an embodiment of the utility model Figure 2 ;

[0020] Attachment Figure 6 This is a schematic diagram of a measuring device according to an embodiment of the present invention;

[0021] Attachment Figure 7 This is a second layout diagram of an embodiment of the present utility model;

[0022] Attachment Figure 8 This is a third layout diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0028] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0029] Refer to the attached Figure 1 To the attached Figure 8 As shown, a contour detection device includes a bed 1, a processing device 2 and a measuring device 3. The bed 1 includes an X-axis slide 11, a Z-axis slide 12 and a first transmission mechanism and a second transmission mechanism for driving the X-axis slide 11 and the Z-axis slide 12.

[0030] In one embodiment of the present utility model, a workpiece spindle 4 capable of C-axis rotation is provided on the Z-axis slide 12. The workpiece spindle 4 adopts an electric spindle and uses a cooler to force constant temperature cooling to ensure stable operation and high precision. A turntable 5 capable of rotating around the B1 axis is provided on the X-axis slide 11, and the processing device 2 is located on the turntable 5.

[0031] In one embodiment of the present invention, the processing device 2 includes a column and a first processing axis 21 and a second processing axis 22 that can respectively perform swing angle processing. The first processing axis 21 and the second processing axis 22 can perform station rotation operation through a turntable 5.

[0032] In one embodiment of the present invention, a first drive assembly and a second drive assembly are respectively provided on the column, and the first processing axis 21 and the second processing axis 22 can automatically swing under the action of the first drive assembly and the second drive assembly respectively.

[0033] In one embodiment of the present invention, a measuring device 3 is arranged on one side of the processing device 2. The measuring device 3 can be used to respectively detect the thread profile and the inner thread diameter. The measuring device 3 includes a probe 31 and a driving device 32 that can provide torque to the probe 31. The driving device 32 can drive the probe 31 to rotate around the B2 axis. The driving device 32 is a servo motor. The measuring device 3 uses a structure with a center point 33 fixed at both ends to replace the bearing, so that it is easier to achieve high rotation accuracy.

[0034] In one embodiment of the present invention, a dresser device 6 is provided on the side of the workpiece spindle 4. The dresser device 6 can be used according to actual production needs. After a period of grinding, when the grinding wheel is deformed or blunted, particles will appear on the surface of the grinding wheel. At this time, the dresser device 6 can be used to grind the grinding wheel.

[0035] In one embodiment of the present invention, when detecting the thread profile (see attached Figure 3 ), including the following detection steps:

[0036] The first step is to put the drive device 32 into a torque control state, so that the B2 axis becomes a follower axis. Since a torque is applied to the probe 31 from the outside, the probe ball can always be in contact with the workpiece;

[0037] In the second step, the Z-direction slide 12 drives the workpiece to reciprocate, so that the probe 31 and the workpiece produce relative displacement, and the displacement of the workpiece in the Z direction is recorded as δ;

[0038] In the third step, the angles α1 and α2 between the axis of the workpiece and the line connecting the center of the probe ball and the rotation center before and after step 2) are respectively detected by the circular encoder signal of the B2 axis;

[0039] In the fourth step, the distance from the center of the probe ball to the center of rotation of the B2 axis is recorded as D. The displacement distances of the probe ball in the Z and X directions before and after step 2) are recorded as ΔZ1 and ΔX1 respectively.

[0040] The fifth step is to draw the workpiece contour based on the change curves of ΔX1 and ΔZ1, the diameter d of the detection ball, and the workpiece displacement δ. The measured contour line is a continuous contour line, which is more accurate than the common multi-point measurement method.

[0041] In one embodiment of the present invention, when detecting the pitch diameter of the internal thread (refer to the attached Figure 4 , Attachment Figure 5 ), including the following detection steps:

[0042] In the first step, the distance between the two ends of the probe 31 is recorded as L, and the driving device 32 is adjusted to the torque control state so that the probe ball can contact the workpiece;

[0043] The second step is to adjust the installation position of the probe 31 so that the center of the probe 31 and the rotation center of the workpiece are at the same height;

[0044] In the third step, the X-axis slide 11 drives the probe 31 to reciprocate. When the probe 31 contacts the inner wall of the front side of the workpiece, the X-axis slide 11 stops moving and records the current position of the X-axis.

[0045] In the fourth step, the X-axis slide 11 moves in the opposite direction, driving the probe 31 to contact the rear inner wall of the workpiece, and recording the X-axis position at this time to obtain the difference ΔX2 between the two positions. The inner diameter of the internal thread to be detected can be calculated as L+ΔX2.

[0046] In one embodiment of the present invention, referring to the attached Figure 7 The grating rulers used in both the X and Z axes can be used for position feedback, and the measuring device 3 can be installed on the Z-direction slide 12. When the workpiece moves back and forth in the X-axis direction, the measuring device 3 can produce relative displacement with the workpiece.

[0047] In one embodiment of the present invention, the measuring device 3 can also be set on a machine tool without a turntable, as shown in the attached figure. Figure 8 The bed 1 is equipped with an X-axis slide 11 and a Z-axis slide 12. The grinding wheel spindle moves back and forth on the X-axis slide 11, and the workpiece moves left and right on the Z-axis slide 12. Both the X and Z axes use linear scales for position feedback. The measuring device 3 is mounted on the X-axis slide 11 and also includes a swing angle device B3 to avoid spatial interference during machining.

[0048] When in the processing state, the swing arm swings upward to avoid interference between the workpiece and the measuring device 3. When in the measuring state, the swing arm is lowered to make the measuring device 3 in a horizontal state. When the workpiece moves back and forth with the Z-direction slide 12, the measuring device 3 can produce relative displacement with the workpiece.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A contour detection device, characterized in that: The invention comprises a bed (1), a processing device (2) and a measuring device (3), wherein the bed (1) comprises an X-axis slide (11) and a Z-axis slide (12), wherein the Z-axis slide (12) is provided with a workpiece spindle (4) capable of C-axis rotation, and the X-axis slide (11) is provided with a processing device (2). The measuring device (3) is arranged on one side of the processing device (2), and the measuring device (3) can be used to respectively detect the thread profile and the internal thread pitch diameter. The measuring device (3) comprises a probe (31) and a driving device (32) capable of providing torque to the probe (31), wherein a detection ball is provided on the top of the probe (31), and the driving device (32) can drive the probe (31) to rotate around the B2 axis.

2. The contour detection device according to claim 1, wherein: The measuring device (3) further comprises two correspondingly arranged tips (33).

3. The contour detection device according to claim 1, wherein: The processing device (2) comprises a column and a first processing axis (21) and a second processing axis (22) which can respectively perform swing angle processing.

4. The contour detection device according to claim 3, wherein: The columns are respectively provided with a first drive assembly and a second drive assembly, and the first processing axis (21) and the second processing axis (22) can automatically swing under the action of the first drive assembly and the second drive assembly respectively.

5. The contour detection device according to claim 1, wherein: The bed (1) further comprises a first transmission mechanism and a second transmission mechanism for driving the X-direction slide (11) and the Z-direction slide (12).

6. The contour detection device according to claim 1, wherein: A dresser device (6) is provided on the side of the workpiece spindle (4).

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