CN212674086U - Mechanical grinding disc tooth-shaped scanner - Google Patents

Abstract

The utility model discloses a mechanical grinding disc tooth-shaped scanner, which mainly comprises a rotating seat of a measuring actuating mechanism, a lever, a scanning pen at the front end of the lever, a probe arranged on the lever, and a scanning screen rotating synchronously with a grinding disc; the positioning ring, the sliding block and the positioning locker of the tested object fixing mechanism; the ultra-thin hard high-carbon steel is used as a probe, continuous contact is carried out on the tooth surface with a specific radius of a rotating grinding disc, and the scanning pen is used for drawing the amplified contour line of the radial section of the tooth surface to be measured by the lever amplification principle, so that the quantitative measurement and analysis can be continuously carried out by other tools, and the precision error is reduced; the grinding disc to be measured is positioned by the three sliding blocks synchronously driven by the three curved grooves, so that the concentricity of the section radius is ensured during measurement, the grinding disc is convenient to repeatedly place, and the working efficiency is improved; the positioning and locking device enables the measured grinding disc to be stable and firm, keeps synchronously rotating with the scanning screen, and ensures the reliability of measurement.

Description

Mechanical grinding disc tooth-shaped scanner

Technical Field

The utility model relates to a profile scanning device especially is a profile of tooth profile scanner of circular abrasive disc.

Technical Field

The grinding disc is formed by high-temperature sintering after injection molding of ceramic materials or is processed by metal materials, the tooth profile of the grinding disc is a main factor for determining grinding quality (grinding efficiency and grinding fineness), currently, a 3D laser profile scanner is mainly used for quantitatively measuring the tooth profile, the system precision of the 3D laser profile scanner at the middle and low ends cannot meet the requirement, if the instrument at the middle and low ends has the measuring precision of 0.05-0.1mm, but when the sharpness (the radius R value of a sharp corner) of the tooth tip is required to be within R0.1mm in the design of the grinding disc tooth profile, even smaller, the measuring precision is obviously insufficient, the price of the instrument at the higher end is very high, and higher cost pressure is formed for enterprises.

Due to the above, some grinding disc developers give up quantitative measurement of tooth profile, which affects the determination of product quality.

SUMMERY OF THE UTILITY MODEL

In order to solve present abrasive disc profile of tooth profile measuring with high costs, the precision is not enough, or abandon the problem of quantization measurement, the utility model discloses utilize the lever to enlarge the principle, provided a solution and corresponding mechanical scanner that the precision is reliable and low-cost.

The mechanical scanner mainly comprises the following components: the device comprises a base, a rotating seat, a grinding disc positioning device fixed on the rotating seat, a positioning locker, a scanning screen, white paper, a central shaft fixed on the base, a tooth-shaped amplification lever with one end arranged on the central shaft, and a probe fixer, a probe, a spring and a scanning pen which are arranged on the lever.

The rotary seat is arranged on the plane of the base, can rotate by taking the central shaft as a circle center, and is fixed with a grinding disc to be measured, a scanning screen and white paper.

A lever horizontally extends above a central shaft, a fulcrum of the lever vertically penetrates through the axis of the central shaft, the lever can rotate up and down by taking the fulcrum as the center of a circle, a probe is installed on the lever through a probe fixer, the distance between the probe and the axis of the central shaft is the length of a short arm of the lever, a long arm of the lever is the extension of the short arm, a scanning pen is installed at the tail end of the long arm, the distance between a scanning screen and the axis of the central shaft is the length of the long arm of the lever, and the length ratio of the long arm to the short.

The probe is pressed tightly in the slit of the probe fixer by screws, the blade tip of the high-carbon steel sheet with the edge is in inclined contact with the surface of the grinding disc cutter teeth, the position of the blade tip can be changed between the left slit and the right slit of the probe fixer according to different rotation directions of the grinding disc cutter teeth, after the blade tip is pressed and fixed, the scanning direction of the probe is tangent to the direction of each tooth of the grinding disc, if the grinding discs with different models are measured, the condition of obvious incoherence occurs, a new probe fixer is used, and the slit position is changed according to the grinding disc. The distance between the probe holder and the central axis (pivot) can be adjusted depending on the diameter of the abrasive disk or the radius of the cross-sectional circle scanned, the length of the corresponding short arm changes, and the magnification factor needs to be recalculated.

The lever is connected with the central shaft through a movable bolt, and the bolt is positioned at the fulcrum of the lever.

The scanning pen is arranged in the lever, a fine gel pen is adopted, the pen point extends out of the lever rod head, and a compression spring is arranged at the tail of the pen to enable the pen point to keep proper contact pressure with white paper.

The grinding disk positioning device comprises three sliding blocks which are uniformly distributed and can move towards a central shaft at the same time, a rotatable positioning ring which drives the three sliding blocks by a curved groove, and a circular pressure plate which is fixed on a rotating seat and ensures that the positioning ring can stably rotate.

The guide groove of the slide block is arranged on the rotary seat and the pressure plate, the positioning ring presses the slide block from the upper side, and the slide block is driven to move in the guide groove through a cylinder extending into the curved groove of the positioning ring on the slide block.

The positioning locker is arranged near the outer diameter of the positioning ring, an eccentric circle structure is adopted, after the grinding disc is clamped by the sliding block, the rotating locker rotates around the shaft, the gradually enlarged eccentric diameter of the rotating locker is gradually contacted with the outer circumference of the positioning ring, and when the locker cannot rotate, the positioning ring, the sliding block and the grinding disc to be measured are locked; the locking device is rotated reversely, so that the locking device can be loosened; the rotation direction of the positioning locker during locking operation is transmitted to the positioning ring through friction force, the positioning ring finally rotates towards the positioning direction, further thrust is generated on the sliding block, and finally the grinding disc is completely clamped.

One end of the rotary seat is provided with a scanning screen vertical to the lever, the scanning screen is in the shape of a section of cylindrical inner arc surface, the arc length is a section of the whole circumference and is parallel to the cylindrical surface of the central shaft, and the left end and the right end of the scanning screen are planes so as to avoid the collision of the pen points of a scanning pen and facilitate paper pressing of a paper holder; a paper slot with the thickness of paper is arranged between the lowest end of the scanning screen and the rotary seat and is used for inserting a piece of white paper which is consistent with the size of the scanning screen and is tightly attached to the scanning screen.

The paper holder made of elastic steel wire can press the white paper on the scanning screen to prevent it from loosening.

The beneficial effects of the utility model are that, adopt lever principle to do the enlarged scanning to the profile of grinding disc tooth, can detect slight shape change, the device is with low costs, and repeated positioning is quick, and the precision is reliable, and scanning result output can be converted into the CAD format by 2D image measuring instrument on paper, the quantization and the follow-up analysis of the shape parameter of being convenient for.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of an upper view angle of the present invention;

FIG. 2 is a schematic view from a front perspective, partially in section;

FIG. 3 is a perspective view of the novel embodiment in use;

FIG. 4 is a schematic view of the operation of the locking device;

fig. 5 shows the tooth profile obtained by scanning, converted into CAD format and labeled.

In the figure, 1, a base, 2, a rotating seat, 3, a central shaft, 4, a scanning screen, 5, a positioning ring, 6, a curved groove, 7, a pressing plate, 8, a first sliding block, 9, a second sliding block, 10, a third sliding block, 11, a bolt, 12, a probe fixing device, 13, a probe fastening screw, 14, a probe, 15, a probe fixing device adjusting screw, 16, a positioning locker, 17, a lever, 18, a rod head, 19, white paper, 20, a paper clamping device, 21, a spring, 22, a scanning pen, 23, a paper seam, 24, a first guide groove, 25, a second guide groove, 26, a third guide groove, 27, a probe protective sleeve, 28, an enlarged contour line of the radial section of a section of grinding disc cutter tooth, 29 and a grinding disc to be measured are arranged.

Detailed Description

[ example 1 ]

When the mechanical grinding disc tooth-shaped scanner is used, the bolt 11 is firstly pulled out, the lever 17 is taken down, the central hole of the grinding disc penetrates through the central shaft 3 and is horizontally placed on the pressure plate 7, the positioning ring 5 is rotated by hand, the first slide block 8, the second slide block 9 and the third slide block 10 move towards the center along the first guide groove 24, the second guide groove 25 and the third guide groove 26 respectively and abut against the grinding disc 29 to be measured, the positioning locker 16 is rotated by hand to abut against the outer cylindrical surface of the positioning ring 5, the grinding disc 29 is locked and can not move or rotate at all, and the grinding disc 29 enters a measurable state. The lever 17 is arranged in the central shaft 3, the bolt 11 is inserted, the lever 17 is lifted, the pen point of the scanning pen 22 is not contacted with the scanning screen 4, the rotary seat 2 is rotated, the pen point is positioned at one side of the scanning screen 4 as a scanning starting point, the lever 17 is put down, the probe 14 is contacted with the surface of the grinding disc 29, the white paper 19 is inserted into the paper gap 23, the paper clamper 20 is used for pressing the white paper 19, the scanning screen 4 is pushed by hand to rotate slowly at a constant speed, the grinding disc 29 and the white paper 19 also rotate synchronously, the probe 14 fluctuates up and down along with the tooth form of the grinding disc 29, as shown by an arrow C in figure 2, the pen point at the front end of the rod head 18 is driven to fluctuate up and down, and a section of the radial section enlarged contour line.

The white paper 19 is taken down, the rotary seat 2 is rotated back to the initial position, the white paper is replaced, the positioning locker 16 is loosened, the grinding disc 29 is rotated for a certain angle, the next section of cutter teeth contacts the probe 14, the next section of cutter teeth is locked again, the next section of scanning can be carried out, and the contour line of the section with the specific radius of the whole grinding disc 29 can be obtained after continuous operation for a plurality of times.

The contour line of the radial section of the cutter tooth on the paper is scanned by using a 2D image measuring instrument to obtain a contour graph in a CAD format, the CAD graph is correspondingly reduced according to the magnification of the tooth-shaped scanner to be in a ratio of 1:1, and then all actual size values of the tooth-shaped contour can be marked, as shown in figure 5.

[ example 2 ]

The teeth of the grinding disc 29 are oriented clockwise and counterclockwise, as shown in fig. 1, so that the scanning direction of the probe 14 is tangential to the direction of each tooth of the grinding disc, the probe 14 should be installed in the right slot of the probe holder 12, and if the teeth of the grinding disc are oriented counterclockwise, the probe fastening screw 13 should be loosened to remove the probe 14 and replace it with the left slot of the probe holder 12.

Correspondingly, during the scanning operation, the rotation direction of the scanning screen 4 should also change, which in the example of fig. 1 should rotate in the direction a, and the white paper 19 shown in fig. 3 is the result of scanning after rotation; conversely, when the tooth tip is oriented counterclockwise, the scanning screen 4 should be rotated in the direction B in fig. 1.

The principle is that the direction of rotation of the scanning screen 4 should not be such that the probe 14 is moved relative to the abrasive disc against the direction of the tips of the abrasive disc.

[ example 3 ]

The diameter of the various grinding disks is different, and the section radius of one grinding disk is different when scanning, in this case, the position of the probe holder 12 on the lever 17 can be adjusted, the probe holder adjusting screw 15 is loosened, the probe holder 12 can be moved back and forth, after movement, the length of the short arm in the lever system changes, it should be re-measured and calculated, and the magnification of the scanning result on the white paper 19 is adjusted accordingly

Because the probe 14 is not on the axis of the lever 17, the distance between the center point of the probe 14 and the axis of the central shaft 3 should be measured by projecting the center point onto the axis of the lever 17, so that the correct length of the short arm of the lever can be obtained.

The length of the long arm is a fixed value and is the rotation radius of the cambered surface of the scanning screen 4, namely the distance from the cambered surface of the scanning screen 4 to the axis of the central shaft 3. Magnification is long arm length/short arm length.

[ example 4 ]

When the grinding discs with different thicknesses are measured, the height position of the probe 14 can be adjusted, so that the lever 17 always rotates up and down near the horizontal state during scanning, and the measurement precision and the contact amount of the pen point of the scanning pen 22 and the paper surface are ensured to be proper; the probe fixing screw 13 is loosened, the probe cover 27 is removed, the height position of the probe 14 can be adjusted until the probe 14 contacts with the tooth surface of the grinding disc 29, and when the lever 17 is in a horizontal state, the probe fixing screw 13 is tightened, and then the probe cover 27 is sleeved. This operation can also be used to replace worn probes.

[ example 5 ]

During the locking operation of the positioning locking device 16, as shown in fig. 4, the rotation direction D is opposite to the positioning rotation direction E of the positioning ring 5, so that the friction force when the positioning locking device and the positioning ring are in contact makes the positioning ring 5 rotate finally in the positioning direction, and the slide block is subjected to the pushing force F to completely clamp the grinding disc 29 to be measured.

Claims (5)

1. A mechanical grinding disc tooth-shaped scanner comprises a rotary base (2) of a measuring execution mechanism, a lever (17), a scanning pen (22), a scanning screen (4), a probe (14), a positioning ring (5) of a measured object fixing mechanism, a first sliding block (8), a second sliding block (9), a third sliding block (10) and a positioning locker (16), and is characterized in that an extremely thin hard high-carbon steel is used as the probe (14) to be in continuous contact with the tooth surface of a measured grinding disc, the lever (17) which rotates up and down is used for longitudinal scanning through a lever amplification principle, the scanning screen (4) which rotates horizontally and directionally synchronously with the grinding disc (29) is used for transverse scanning, and the scanning pen (22) arranged at the front end of the lever is used for drawing an amplification contour line of a section with a specific radius of the tooth surface to be measured.

2. The mechanical grinding disc tooth scanner according to claim 1, characterized in that the magnifying effect is achieved by using a probe mounted on the short arm and a scanning pen (22) mounted on the long arm of the lever (17) to magnify the details of the tooth profile on the paper.

3. The mechanical abrasive disc tooth scanner according to claim 2, wherein the probe (14) uses an extremely thin cutting edge of a hard high carbon steel sheet.

4. The mechanical grinding disc tooth scanner according to claim 1, wherein when the positioning ring (5) rotates, the three curved grooves on the positioning ring drive the first slide block (8), the second slide block (9) and the third slide block (10) to move synchronously in the guide grooves, so as to position the grinding disc to be measured at the rotation center of the scanner.

5. The mechanical grinding disk tooth scanner according to claim 1 or 4, characterized in that the positioning locker (16) adopts an eccentric circle mechanism, which rotates in the opposite direction to the positioning rotation direction of the positioning ring (5) during the locking operation, and when the positioning ring (5) is contacted with the outer wall of the positioning ring (5) more and more tightly, the positioning ring (5) can also rotate last in the positioning direction, so that the first slide block (8), the second slide block (9) and the third slide block (10) generate further clamping thrust.

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