Screw tap multi-parameter measuring device

Abstract

The utility model discloses a multi-parameter measuring device for a screw tap. The multi-parameter measuring device comprises a base, a three-dimensional motion platform, a laser sensor and a screw tap clamping mechanism, the three-dimensional motion platform is arranged on the base, and the laser sensor is installed on the three-dimensional motion platform; the screw tap clamping mechanism comprises a headstock and a tailstock which are arranged on the base in a spaced mode, a rotatable first tip is installed on the headstock, a rotatable second tip is installed on the tailstock, the first tip and the second tip are coaxially and oppositely arranged, and a screw tap is clamped between the first tip and the second tip; and the first tip and the second tip rotate synchronously. According to the utility model, the first tip and the second tip in the screw tap clamping mechanism respectively abut against the two ends of the screw tap so as to clamp the screw tap to be measured, and the clamping mode does not shield the part of the screw tap to be measured, so that the measurement range of the laser sensor can cover all the parts of the screw tap; therefore, the comprehensiveness and the accuracy of measurement are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tap production detection, in particular to a tap multi-parameter measuring device. Background Art

[0002] Taps are used to process internal threads. During the design and production of taps, the various parameters and dimensions of the taps play an important role in affecting the cutting strength of the taps. However, it is rather troublesome to measure the multiple parameters of taps. Traditional measurement methods usually use image measuring instruments, contour measuring instruments, universal tool microscopes or three-needle measurement methods for manual measurement. Manual measurement is not only inefficient, but also easily affected by human errors. In addition, for the rake angle, groove type and back relief amount of spiral groove taps, the traditional measurement methods often cannot obtain more accurate measurement results.

[0003] The Chinese utility model patent with announcement number CN204255292U discloses an optical automatic measuring machine for tap size, and its technical solution includes a work disk, a PU wheel and an imaging system. At least one station for placing taps is set on the circumference of the work disk. The work disk is driven by the first stepper motor to rotate and switch stations. The PU wheel is connected to the tap placed in the station. The PU wheel is connected to the second stepper motor. The PU wheel is driven by the second stepper motor to drive the PU wheel to rotate in the station. The imaging system is set on the other side of the PU wheel. The imaging system shoots various angles of the tap driven by the PU wheel and images it. Although the utility model can realize automatic measurement of tap size, it uses stations on the circumference of the work disk to place taps, and uses the imaging system to take pictures of the taps in the process of driving the taps to rotate by the rotation of the work disk. The part of the tap that is blocked when placed in the station is large, and the camera can only detect the diameter size of the tap through the image. The types of parameters detected are small and the accuracy is not high. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a tap multi-parameter measuring device which can quickly and accurately detect the dimensions of multiple parameters of the tap.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a tap multi-parameter measuring device, including a base, a three-dimensional motion platform, a laser sensor and a tap clamping mechanism; the three-dimensional motion platform is arranged on the base, and the laser sensor is installed on the three-dimensional motion platform; the tap clamping mechanism includes a headstock and a tailstock arranged at intervals on the base, a rotatable first top is installed on the headstock, and a rotatable second top is installed on the tailstock, the first top and the second top are coaxially arranged opposite to each other, and the tap is clamped between the first top and the second top; the first top and the second top rotate synchronously. The utility model drives the laser sensor to move in the X-axis, Y-axis and Y-axis directions through a three-dimensional motion platform to adjust the measuring position of the laser sensor, and clamps the tap to be measured by respectively tightening the ends of the tap at both ends through the first and second centers in the tap clamping mechanism. The clamping method will not block the part of the tap to be measured, so that the measuring range of the laser sensor can cover all parts of the tap, thereby effectively improving the comprehensiveness and accuracy of the measurement; the tap clamping mechanism can drive the tap to rotate through the synchronous rotation of the first and second centers, so that the tap can be fully displayed within the measuring range of the laser sensor; and because the first and second centers rotate synchronously, the ends of the tap at both ends are simultaneously acted upon by the driving force of the same frequency, and the tap will not be damaged due to inconsistent torque at both ends, so that the rotation of the tap is more stable, which is conducive to further improving the accuracy of the tap parameter measurement.

[0006] As an improvement of the above scheme: it also includes two transmission members rotatably arranged in the head frame and the tail frame through bearings, and the transmission members rotate under the drive of the driving member; the first and second tips are detachably connected to the corresponding transmission members. The utility model realizes the driving of the rotation of the first and second tips through the transmission cooperation of the driving member and the transmission member. The first and second tips are detachably installed on the transmission member, which can facilitate the selection of tips of different sizes or types to match the taps according to the specifications of the taps.

[0007] As an improvement of the above solution: the driving member is a motor.

[0008] As an improvement of the above solution: the headstock or tailstock can be arranged on the base in a translational manner. The utility model arranges the headstock or tailstock as a mobile structure that can be translated, and can adjust the distance between the first top and the second top by translating the headstock or tailstock, thereby adjusting the clamping distance of the tap clamping mechanism, facilitating adaptive adjustment of the clamping distance according to the specifications of the tap, and also facilitating clamping the tap.

[0009] As an improvement of the above scheme: it also includes a slide rail fixedly arranged on the base, and the headstock or tailstock slides with the slide rail; it also includes a locking component that forms a limit fit on the translation path of the headstock or tailstock. In the utility model, the slide rail is used to realize the translation of the headstock or tailstock. The slide rail can provide a stable translation foundation for the headstock or tailstock, making the translation of the headstock or tailstock more stable, and can avoid the translation of the headstock or tailstock from being deflected. At the same time, the slide rail technology is mature and the cost is low.

[0010] As an improvement to the above solution: the first and second tips are both straight tips with tapered tips, and the tapered tips are plug-fitted into the center holes of the two end heads of the tap.

[0011] As an improvement to the above solution: the first center and the second center are both reverse centers with tapered holes, and the tapered holes are plug-fitted with the two end heads of the tap.

[0012] The utility model has the following beneficial effects: the utility model drives the laser sensor to move in the X-axis, Y-axis and Y-axis directions through the three-dimensional motion platform to adjust the measuring position of the laser sensor, the laser sensor can focus the light spot on the tap, and improve the measurement accuracy through non-contact measurement. The measurement process has a high degree of automation, is easy to operate, and can effectively avoid human errors; and the first and second centers in the tap clamping mechanism respectively tighten the ends of the tap at both ends to achieve the clamping of the tap to be measured, and the clamping clamping method will not block the part of the tap to be measured, so that the measuring range of the laser sensor can cover all parts of the tap, thereby effectively improving the comprehensiveness and accuracy of the measurement; the tap clamping mechanism can drive the tap to rotate through the synchronous rotation of the first and second centers, so that the tap can be fully displayed within the measuring range of the laser sensor; and because the first and second centers rotate synchronously, the ends of the tap at both ends are simultaneously subjected to the driving force of the same frequency, and the tap will not be damaged due to inconsistent torque at both ends, so that the rotation of the tap is more stable, which is conducive to further improving the accuracy of the tap parameter measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the cooperation between the tap clamping mechanism and the tap;

[0015] Figure 3 It is a schematic diagram of the cooperation between the first implementation structure of the top and the tap;

[0016] Figure 4 It is a schematic diagram of the cooperation between the second implementation structure of the top and the tap.

[0017] Marked in the figure: 100-base, 200-three-dimensional motion platform, 300-laser sensor, 400-tap clamping mechanism, 410-headstock, 411-first center, 420-tailstock, 421-second center, 500-tap. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0019] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", and "inside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] like Figure 1As shown, the tap multi-parameter measuring device disclosed in the utility model includes a base 100, a three-dimensional motion platform 200, a laser sensor 300 and a tap clamping mechanism 400. The base 100 is the basic component of the tap multi-parameter measuring device, and the three-dimensional motion platform 200 and the tap clamping mechanism 400 are both installed on the base 100; the laser sensor 300 obtains the scanning coordinates of each point of the tap by scanning the tap by irradiating a laser to the tap; the laser sensor 300 is installed on the three-dimensional motion platform 200, and the three-dimensional motion platform 200 can drive the laser sensor 300 to move in the X-axis, Y-axis and Z-axis directions; the tap clamping mechanism 400 is used to clamp and fix the tap to be measured, and can drive the tap to rotate. When performing multi-parameter measurement of a tap, the tap to be measured is clamped and fixed by the tap clamping mechanism 400, and then the laser sensor 300 is moved to the specified measurement position by the three-dimensional motion platform 200. The tap is driven to rotate by the tap clamping mechanism 400, and the laser sensor 300 scans the tap to obtain the scanning coordinates of each point of the tap. The starting coordinates and the end coordinates of the tap parameters to be measured are obtained through the software, and the coordinate value parameters are given to the measurement planning software for calculation to obtain the planned path of the scan, and then the planned path is passed to the control system of the three-dimensional motion platform 200. The three-dimensional motion platform 200 performs corresponding movement, and the laser sensor 300 scans and records the corresponding data during the movement. Finally, the scanning data of the laser sensor 300 is passed to the solution software for automatic solution. The utility model can realize the measurement of multiple parameters of the tap, including but not limited to the thread (major diameter, middle diameter, minor diameter, tooth side angle, pitch, cumulative pitch error), groove shape (front angle, back angle, R1, R2), blade width, core diameter, core thickness increment, helix angle, cutting cone length, cutting cone angle, blade inclination angle and thread back relief of the tap. The software programs involved in the above content of the utility model are all prior art and do not include improvements to the software, so they will not be repeated here.

[0021] Specifically, Figure 1 and Figure 2As shown, the tap clamping mechanism 400 used in the utility model includes a headstock 410 and a tailstock 420, which are mounted on the base 100, and are spaced apart from each other so that a clamping space for the tap is left between the headstock 410 and the tailstock 420. A first apex 411 is mounted on the headstock 410, and a second apex 421 is mounted on the tailstock 420. The first apex 411 and the second apex 421 are coaxially arranged opposite to each other, and the first apex 411 and the second apex 421 are respectively pressed against the two ends of the tap 500, and the tap 500 to be measured is clamped between the first apex 411 and the second apex 421. The first tip 411 and the second tip 421 in the present invention are both rotatable, and the clamped tap 500 can be driven to rotate by the rotation of the first tip 411 and the second tip 421, so as to facilitate scanning by the laser sensor 300; in addition, the present invention stipulates that the rotation mode of the first tip 411 and the second tip 421 is synchronous rotation, including the same rotation direction and rotation speed, so that both ends of the tap 500 can be simultaneously subjected to the rotation driving force of the same frequency, and the tap 500 will not be damaged due to inconsistent torque at both ends, so that the rotation of the tap 500 is more stable, which is conducive to further improving the accuracy of parameter measurement of the tap 500.

[0022] Specifically, in the utility model, the rotation of the first center 411 and the second center 421 is realized by a matching structure composed of a transmission member and a driving member. Bearings coaxially arranged with the center are fixed in the head frame 410 and the tail frame 420, and the bearing sleeve is arranged on the corresponding transmission member. One end of the transmission member is detachably connected to the corresponding center, and the other end is connected to the driving member. The structure of the transmission member is not limited in the utility model, as long as it can be assembled with the bearing and form a transmission with the center, for example, a transmission shaft or other similar structures are used. The detachable connection between the transmission member and the center can adopt a Morse taper shank connection structure that is easy to implement. The driving member in the utility model adopts a motor to realize automatic driving of the transmission member. In addition, the conventional method of rotating the tap is to clamp the tail end of the tap with a chuck or a claw after the tap is clamped, and then the tap is turned to drive the tap to rotate. This method of rotation will cause the tap to be unevenly stressed when multiple degrees of freedom are restricted due to the tightening, and may then deflect, and it is impossible to ensure that the rotation axis of the tap coincides with the rotation axis of the clamping member, which will lead to increased measurement errors, and the clamping work is also time-consuming and labor-intensive. The utility model drives the first top 411 and the second top 421 to rotate synchronously through the cooperation of the transmission member and the driving member, and then drives the tap 500 to rotate, which can effectively avoid the above problems and further improve the accuracy of the measurement.

[0023] In order to improve the scope of application of the utility model, so that the utility model can be applied to the measurement of taps of different specifications, the utility model sets the tap clamping mechanism 400 as a structure with adjustable clamping distance, which is achieved by setting one of the components of the headstock 410 and the tailstock 420 to be translatable. Specifically, the utility model installs a slide rail on the base 100, and correspondingly installs a slider that forms a sliding fit with the slide rail at the bottom of the headstock 410 or the tailstock 420, and the translation of the headstock 410 or the tailstock 420 on the base 100 is achieved through the cooperation of the slide rail and the slider, so that the clamping distance of the tap clamping mechanism 400 can be adjusted, which is convenient for adaptively adjusting the clamping distance according to the specifications of the tap 500, and also convenient for clamping the tap 500. When the head frame 410 or the tail frame 420 is translated into position, the head frame 410 or the tail frame 420 can be locked by a locking component to fix it. The locking component can be a limit block snapped onto the slide rail to achieve the locking function by forming a limit at the end position of the head frame 410 or the tail frame 420.

[0024] The first tip 411 and the second tip 421 used in the present invention have two different implementation structures to adapt to taps of different shapes and specifications. Figure 3 As shown, the first tip 411 and the second tip 421 are both straight tips with tapered tips, and the tapered tips are plugged into the center holes of the two ends of the tap 500; when the tap with center holes at both ends is clamped, the tapered tips of the first tip 411 and the second tip 421 are respectively pressed against the center holes of the two ends of the tap. Figure 4 As shown, the first tip 411 and the second tip 421 both adopt reverse tips with tapered holes, and the tapered holes form a plug-in fit with the two end heads of the tap 500; when the tap with pointed ends is clamped, the two end tips of the tap are respectively inserted into the tapered holes of the second tip 411 and the second tip 421.

Claims

1. Tap multi-parameter measuring device, characterized by: The invention comprises a base (100), a three-dimensional motion platform (200), a laser sensor (300) and a tap clamping mechanism (400); the three-dimensional motion platform (200) is arranged on the base (100), and the laser sensor (300) is installed on the three-dimensional motion platform (200); the tap clamping mechanism (400) comprises a headstock (410) and a tailstock (420) which are arranged at intervals on the base (100); a rotatable first top (411) is installed on the headstock (410), and a rotatable second top (421) is installed on the tailstock (420); the first top (411) and the second top (421) are arranged coaxially and oppositely, and the tap is clamped between the first top (411) and the second top (421); the first top (411) and the second top (421) rotate synchronously.

2. The tap multi-parameter measuring device according to claim 1, characterized in that: It also includes two transmission members which are rotatably arranged in the head frame (410) and the tail frame (420) through bearings respectively, and the transmission members rotate under the drive of the driving member; the first top (411) and the second top (421) are detachably connected to the corresponding transmission members.

3. The tap multi-parameter measuring device according to claim 2, characterized in that: The driving member is a motor.

4. The tap multi-parameter measuring device according to claim 1, characterized in that: The head frame (410) or the tail frame (420) can be arranged on the base (100) in a translationally movably manner.

5. The tap multi-parameter measuring device according to claim 4, characterized in that: It also includes a slide rail fixedly arranged on the base (100), and the head frame (410) or the tail frame (420) is slidably matched with the slide rail; and also includes a locking component that forms a limit fit on the translation path of the head frame (410) or the tail frame (420).

6. The tap multi-parameter measuring device according to claim 1, characterized in that: The first tip (411) and the second tip (421) are both straight tips with conical tips, and the conical tips are plug-fitted into the center holes of the two end heads of the tap.

7. The tap multi-parameter measuring device according to claim 1, characterized in that: The first center point (411) and the second center point (421) are both reverse centers with tapered holes, and the tapered holes are plug-fitted with the two end heads of the tap.

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