阅读说明：本技术 一种磨床用砂轮振动监测报警设备及其使用方法 (Grinding wheel vibration monitoring and alarming device for grinding machine and using method thereof ) 是由 陈丹丹 张云 于 2021-09-16 设计创作，主要内容包括：本发明公开了一种磨床用砂轮振动监测报警设备及其使用方法,属于机床报警设备领域,通过在现有砂轮主轴的基础上增设振动感知器和显色壳来提前察觉砂轮的振动,有效提高砂轮的稳定运行,通过在振动感知器内部设置摩擦生热件让其与振动的砂轮主轴摩擦生热,通过将热量传递给热膨胀球使其膨胀变大将循环流通道堵住,进而让颜料溢出到溢出道中,利用导液带和导液件的导液作用使颜料在显色壳中的吸水纸上显现出来,从而能及时让工人看到,这样不仅能提早察觉砂轮的振动以便及时采取调整措施,而且工人在远离磨床的位置上就能知晓情况,可有效降低人靠近查看时所面临的危险,也是为了避免工人吸入飞溅出的微细砂屑及金属屑。(The invention discloses a grinding wheel vibration monitoring and alarming device for a grinding machine and a using method thereof, belonging to the field of machine tool alarming devices, wherein a vibration sensor and a color developing shell are additionally arranged on the basis of the existing grinding wheel spindle to detect the vibration of a grinding wheel in advance, so that the stable operation of the grinding wheel is effectively improved, a friction heat generating piece is arranged in the vibration sensor to enable the vibration sensor to generate heat by friction with the vibrating grinding wheel spindle, the heat is transferred to a thermal expansion ball to enable the thermal expansion ball to expand and enlarge so as to block a circulating flow channel, and further, pigment overflows into an overflow channel, the pigment is displayed on water absorption paper in the color developing shell by utilizing the liquid guiding function of a liquid guiding belt and the liquid guiding piece, so that a worker can see the vibration of the grinding wheel in advance to take adjustment measures in time, the worker can know the condition at a position far away from the grinding machine, and the danger when the worker approaches to check can be effectively reduced, and also to avoid the worker from sucking the splashed fine sand and metal chips.)

1. The utility model provides a grinding wheel vibration monitoring alarm device for grinding machine, includes the grinding machine body, the grinding machine body includes emery wheel, main shaft and driving motor, its characterized in that: the inner part of the grinding machine body is fixedly connected with a vibration sensor (1) sleeved outside a main shaft, the middle part of the vibration sensor (1) is provided with a main shaft through hole (101) matched with the main shaft, the inner wall of the vibration sensor (1) is provided with a closed pigment circulating flow channel (102), the vibration sensor (1) is positioned outside the pigment circulating flow channel (102) and is provided with an unclosed overflow channel (103), a plurality of communicating channels (104) are communicated between the pigment circulating flow channel (102) and the overflow channel (103), a circulating loop is formed between the bottom part and the upper part of the pigment circulating flow channel (102) through a pipeline, the side wall of the main shaft through hole (101) is provided with a plurality of sliding grooves (2) communicated with the pigment circulating flow channel (102), and a friction heat generating piece (3) matched with the appearance of the main shaft is connected in the sliding grooves (2) in a sliding manner, every equal fixedly connected with limit support piece (4) between the lateral wall of friction heat generation spare (3) and main shaft perforation (101), inner wall fixedly connected with barrier film (5) that sliding tray (2) are close to friction heat generation spare (3), middle part position fixedly connected with thermal expansion ball (6) between barrier film (5) and sliding tray (2), and fixedly connected with a plurality of heat conduction soft silk (301) that run through barrier film (5) between thermal expansion ball (6) and friction heat generation spare (3), the lateral wall fixedly connected with colour development shell (7) of grinding machine body, the inside fixedly connected with of colour development shell (7) leads liquid spare (9), and the back of leading liquid spare (9) is inlayed and is had the liquid guide area (8) that runs through to overflowing saying (103) bottom.

2. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the friction heat generating piece (3) comprises an arc-shaped heat generating plate and a heat conducting rod in sliding connection with the sliding groove (2), and the heat generating plate is made of a friction-resistant material.

3. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the liquid guide piece (9) comprises a liquid separation plate (901) connected with the liquid guide belt (8), a liquid absorption plate (902) provided with capillaries is fixedly connected to the side wall of the liquid separation plate (901) far away from the liquid guide belt (8), and white absorbent paper is pasted on the liquid absorption plate (902).

4. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 3, wherein: the liquid guiding belt (8) and the liquid separating plate (901) are made of high liquid guiding resin materials, and the liquid guiding performance of the liquid separating plate (901) is larger than that of the liquid guiding belt (8).

5. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the communication channels (104) are all arranged towards the upper side by taking a horizontal line as a standard, and the communication channels (104) positioned at the left side and the right side of the central point of the main shaft through hole (101) are symmetrically arranged.

6. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the diameter of the thermal expansion ball (6) is larger than the inner diameter of the pigment circulating flow channel (102), and the thermal expansion ball (6) is positioned on the central point of the pigment circulating flow channel (102) communicated with the sliding groove (2).

7. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the limiting support piece (4) is made of a high-elasticity material, and the limiting support piece (4) is of a three-dimensional net structure.

8. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the side wall of the color development shell (7) facing the outside is rotatably connected with a transparent plate (701) through a hinge, and the opening end of the transparent plate (701) is adsorbed with the color development shell (7) through a magnet.

9. A grinding wheel vibration monitoring and warning device for a grinding machine as claimed in claim 1, wherein: the distance between the isolating film (5) and the thermal expansion ball (6) is larger than the distance between the isolating film (5) and the friction heat generating piece (3), and the isolating film (5) is made of soft elastic materials.

10. A method of using a grinding wheel vibration monitoring and warning apparatus for a grinding machine as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:

s1, before the grinder is started to operate, the transparent plate (701) is opened to stick white absorbent paper on the liquid absorption plate (902), and then liquid pigment is injected into the pigment circulating flow channel (102) from the top of the vibration sensor (1);

s2, starting the grinder to operate, when the grinding wheel vibrates in the rotating process, the main shaft rubs with the friction heat generating pieces (3) around due to the rotation deviation, the generated friction heat is transferred to the thermal expansion balls (6) to expand and enlarge the thermal expansion balls, so that the liquid pigment in the pigment circulating flow channel (102) overflows into the overflow channel (103), and finally color is developed on the white absorbent paper through the conduction action of the liquid guide belt (8) and the liquid guide piece (9), and workers can timely perceive the vibration of the grinding wheel;

s3, when the grinding wheel does not vibrate, the liquid pigment circulates in the pigment circulating flow channel (102), and the white absorbent paper does not show color.

Technical Field

The invention relates to the field of machine tool alarm equipment, in particular to grinding wheel vibration monitoring alarm equipment for a grinding machine and a using method thereof.

Background

A grinding machine is a machine tool that grinds the surface of a workpiece using a grinding tool. Most grinding machines perform grinding using a grinding wheel rotating at a high speed, and a few grinding machines perform grinding using oilstones, sanding belts and other grinders and free abrasives, such as honing machines, superfinishing machines, sanding belt grinders, grinding machines, polishing machines, and the like. The grinder can process materials with higher hardness, such as hardened steel, hard alloy and the like; brittle materials such as glass, granite, etc. can also be processed. The grinding machine can grind with high precision and small surface roughness, and can grind with high efficiency, such as strong grinding.

Grinding wheels are the most important parts of the grinding machine. The emery wheel is when in actual use, and wearing and tearing can be more and more serious along with the extension of time, and this directly leads to the mass center and the center of rotation of emery wheel skew mutually, and then makes the main shaft that drives the emery wheel produce vibration, and the vibration not only can accelerate the wearing and tearing of main shaft, can directly influence the quality that workpiece surface polished moreover.

Whether the mode of looking over the emery wheel vibration condition is mainly listening to at present has obvious vibration sound, sees the line of polishing on workpiece surface before two, but the work piece has the piece that splashes when polishing, can endanger people's life safety, and the emery wheel can only be perceived when producing more obvious vibration moreover, and people do not know before this.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide grinding wheel vibration monitoring and alarming equipment for a grinding machine and a using method thereof, the vibration of a grinding wheel is sensed in advance by additionally arranging a vibration sensor and a color developing shell on the basis of the existing grinding wheel spindle, the stable operation of the grinding wheel is effectively improved, a friction heat generating piece is arranged in the vibration sensor to generate friction with the vibrating grinding wheel spindle so as to generate friction heat, the heat is transferred to a thermal expansion ball to expand and enlarge the thermal expansion ball to block a pigment circulating flow channel in which liquid pigment flows, so that the pigment in the pigment circulating flow channel overflows into an overflow channel, the pigment is displayed on water absorption paper in the color developing shell by utilizing the liquid guiding action of a liquid guiding belt and the liquid guiding piece, a worker can see the vibration of the grinding wheel in time, and therefore, the vibration of the grinding wheel can be sensed in advance so as to take adjustment measures in time, moreover, the worker can know the situation at a position far away from the grinding machine, the danger of people approaching to and looking over can be effectively reduced, and the worker is prevented from sucking splashed fine sand and metal chips.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A grinding wheel vibration monitoring and alarming device for a grinding machine comprises a grinding machine body, wherein the grinding machine body comprises a grinding wheel, a spindle and a driving motor, a vibration sensor sleeved outside the spindle is fixedly connected inside the grinding machine body, a spindle through hole matched with the spindle is formed in the middle of the vibration sensor, a closed pigment circulating flow channel is formed in the inner wall of the vibration sensor, an unclosed overflow channel is formed outside the pigment circulating flow channel of the vibration sensor, a plurality of communicating channels are communicated between the pigment circulating flow channel and the overflow channel, a circulating loop is formed between the bottom and the upper part of the pigment circulating flow channel through a pipeline, a plurality of sliding grooves communicated with the pigment circulating flow channel are formed in the side wall of the spindle through hole, friction heat generating pieces matched with the appearance of the spindle are connected in the sliding grooves in a sliding mode, and a limiting supporting piece is fixedly connected between each friction heat generating piece and the side wall of the spindle through hole, the inner wall fixedly connected with barrier film that the sliding tray is close to friction heat generation spare, middle part position fixedly connected with thermal energy ball between barrier film and the sliding tray, and a plurality of heat conduction soft silks that run through the barrier film of fixedly connected with between thermal energy ball and the friction heat generation spare, the lateral wall fixedly connected with color development shell of grinding machine body, the inside fixedly connected with drain of color development shell, and the back of drain inlays to have and runs through to the drain area that overflows the way bottom.

Furthermore, the friction heat generating piece comprises an arc-shaped heat generating plate and a heat conducting rod in sliding connection with the sliding groove, the heat generating plate is made of a friction-resistant material, and when the main shaft vibrates, the main shaft rubs with the friction heat generating piece around due to radial run-out, so that friction heat is generated.

Further, the drain spare includes the distribution board of being connected with the drain area, the lateral wall fixedly connected with that the liquid guide area was kept away from to the distribution board has seted up the imbibition board of capillary, and the capillary makes the imbibition board have the effect of active absorption liquid pigment on the distribution board, and pastes on the imbibition board and has white absorbent paper, overflows the liquid pigment in the overflow way and is transmitted to the distribution board by the drain area on, the imbibition board utilizes capillary phenomenon to absorb pigment from the distribution board initiative, and then soaks white absorbent paper.

Furthermore, the liquid guide belt and the liquid separation plate are made of high liquid guide resin materials, and the liquid guide performance of the liquid separation plate is larger than that of the liquid guide belt, so that the liquid pigment can be quickly transmitted to the liquid separation plate, and the color can be developed on the absorbent paper as soon as possible.

Furthermore, a plurality of the communicating channels are arranged upwards by taking the horizontal line as a standard, and because the communicating channels are communicated with the pigment circulating flow channel, in order to prevent liquid pigment in the pigment circulating flow channel from directly entering the communicating channels, the communicating channels are inclined upwards, so that the pigment can overflow into the communicating channels after the pigment circulating flow channel is blocked by the thermal expansion balls, and the communicating channels positioned at the left side and the right side of the central point of the main shaft perforation are symmetrically arranged.

Furthermore, the diameter of the thermal expansion ball is larger than the inner diameter of the pigment circulating flow channel, and the thermal expansion ball is positioned at the central point of the pigment circulating flow channel communicated with the sliding groove, so that the pigment circulating flow channel can be completely blocked after the thermal expansion ball absorbs heat and expands, and pigment can smoothly overflow from the pigment circulating flow channel to the overflow channel.

Furthermore, the limiting support piece is made of a high-elasticity material and is of a three-dimensional net structure, the limiting support piece not only plays a role in positioning the friction heat generating piece to prevent the main shaft from being rubbed with the friction heat generating piece when not vibrating, but also can absorb part of vibration force of the main shaft through the elasticity of the limiting support piece, and vibration is reduced to a certain extent.

Furthermore, the lateral wall of the color development shell towards the outside is rotatably connected with a transparent plate through a hinge, and the opening end of the transparent plate is adsorbed with the color development shell through a magnet.

Furthermore, the distance between the isolating membrane and the thermal expansion ball is greater than the distance between the isolating membrane and the friction heat generating piece, and the isolating membrane is made of soft elastic materials, so that the isolating membrane does not obstruct the heat absorption expansion of the thermal expansion ball, and meanwhile, the isolating membrane can play a sealing role and prevent the liquid pigment from flowing out from the sliding groove.

Further, the use method of the grinding wheel vibration monitoring and alarming device for the grinding machine comprises the following steps:

s1, before the grinder is started to operate, the transparent plate is opened to stick the white absorbent paper on the liquid absorption plate, and then the liquid pigment is injected into the pigment circulating flow channel from the top of the vibration sensor;

s2, starting the grinder to operate, when the grinding wheel vibrates in the rotating process, the main shaft rubs with the friction heat generating pieces around due to the rotation deviation, the generated friction heat is transferred to the thermal expansion balls to expand, and then the liquid pigment in the pigment circulating flow channel overflows into the overflow channel, and finally color is developed on the white absorbent paper through the conduction action of the liquid guide belt and the liquid guide piece, so that workers can timely perceive the vibration of the grinding wheel;

and S3, when the grinding wheel does not vibrate, the liquid pigment circulates in the pigment circulating flow channel, and the white absorbent paper does not show color.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme is that the vibration sensor and the color developing shell are additionally arranged on the basis of the existing grinding wheel spindle to detect the vibration of the grinding wheel in advance, so that the stable operation of the grinding wheel is effectively improved, the friction heat generating piece is arranged in the vibration sensor to generate friction with the vibrating grinding wheel spindle and further generate friction heat, the heat is transferred to the thermal expansion ball to expand and enlarge the thermal expansion ball to block a pigment circulating flow channel in which liquid pigment flows, so that the pigment in the pigment circulating flow channel overflows into an overflow channel, and the pigment is displayed on the water absorption paper in the color developing shell by using the liquid guiding function of the liquid guiding belt and the liquid guiding piece, so that a worker can see the vibration of the grinding wheel in time, thereby not only detecting the vibration of the grinding wheel in advance to take adjustment measures in time, but also knowing the condition of the worker at a position far away from the grinding wheel, and effectively reducing the danger faced by the person when the grinding wheel approaches to check, and also to avoid the worker from sucking the splashed fine sand and metal chips.

(2) The friction heat generating piece comprises an arc-shaped heat generating plate and a heat conducting rod in sliding connection with the sliding groove, the heat generating plate is made of a friction-resistant material, and when the main shaft vibrates, the friction heat generating piece rubs with the friction heat generating piece around due to radial jumping, and friction heat is generated.

(3) The drain spare includes the liquid separating plate who is connected with the drain area, the lateral wall fixedly connected with that the liquid separating plate kept away from the drain area has seted up the imbibition board of capillary, the capillary makes the imbibition board have the effect of active absorption liquid pigment on the liquid separating plate, and it has white paper that absorbs water to paste on the imbibition board, the liquid pigment that spills over in the overflow way is transmitted to the liquid separating plate by the drain area on, the imbibition board utilizes capillary phenomenon to absorb pigment from the liquid separating plate initiative, and then soaks white paper that absorbs water.

(4) The liquid guide belt and the liquid separation plate are made of high liquid guide resin materials, and the liquid guide performance of the liquid separation plate is larger than that of the liquid guide belt, so that the liquid pigment can be quickly transmitted to the liquid separation plate, and color can be developed on the absorbent paper as soon as possible.

(5) The plurality of communicating channels are all arranged upwards by taking a horizontal line as a standard, and are communicated with the pigment circulating flow channel, so that the communicating channels are inclined upwards to prevent liquid pigment in the pigment circulating flow channel from directly entering the communicating channels, the pigment can overflow into the communicating channels after the pigment circulating flow channel is blocked by the thermal expansion balls, and the communicating channels on the left side and the right side of the central point of the main shaft perforation are symmetrically arranged.

(6) The diameter of the thermal expansion ball is larger than the inner diameter of the pigment circulating flow channel, and the thermal expansion ball is positioned at the central point of the pigment circulating flow channel communicated with the sliding groove, so that the pigment circulating flow channel can be completely blocked after the thermal expansion ball absorbs heat and expands, and pigment can smoothly overflow from the pigment circulating flow channel to the overflow channel.

(7) The limiting support piece is made of a high-elasticity material and is of a three-dimensional net structure, the limiting support piece not only plays a role in positioning the friction heat generating piece to prevent the main shaft from rubbing the friction heat generating piece when not vibrating, but also can absorb part of vibration force of the main shaft through the elasticity of the limiting support piece, and vibration is reduced to a certain extent.

(8) The lateral wall of the color development shell towards the outside is rotationally connected with a transparent plate through a hinge, and the open end of the transparent plate is adsorbed with the color development shell through a magnet.

(9) The distance between the isolating membrane and the thermal expansion ball is larger than the distance between the isolating membrane and the friction heat generating piece, and the isolating membrane is made of soft elastic materials, so that the isolating membrane does not obstruct the heat absorption expansion of the thermal expansion ball, and meanwhile, the isolating membrane can also play a role in sealing, and liquid pigment is prevented from flowing out from the sliding groove.

Drawings

FIG. 1 is a schematic diagram comparing the prior art with the present invention;

FIG. 2 is a perspective and front view schematic of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a schematic diagram of the position relationship of the internal channel of the vibration sensor according to the present invention;

FIG. 5 is a schematic view of the lowermost communication channel of the present invention;

FIG. 6 is a schematic view of a thermally expansive ball before vibration occurs in accordance with the present invention;

FIG. 7 is a schematic view of a thermally expandable ball of the present invention after vibration has occurred;

FIG. 8 is a schematic flow-through illustration of the liquid color of the present invention when not vibrated;

FIG. 9 is a schematic representation of the flow through of liquid pigment after vibration of the present invention has occurred;

fig. 10 is a schematic view of the liquid guide assembly of the present invention.

The reference numbers in the figures illustrate:

1 vibration sensor, 101 main shaft perforation, 102 pigment circulation flow channel, 103 overflow channel, 104 communication channel, 2 sliding groove, 3 friction heat generating piece, 301 heat conducting soft filament, 4 spacing support piece, 5 isolating membrane, 6 thermal expansion ball, 7 color developing shell, 701 transparent plate, 8 liquid guiding belt, 9 liquid guiding piece, 901 liquid separating plate and 902 liquid absorbing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-10, a grinding wheel vibration monitoring and alarming device for a grinding machine comprises a grinding machine body, referring to fig. 1, 2, 4 and 5, the grinding machine body comprises a grinding wheel, a spindle and a driving motor, a vibration sensor 1 sleeved outside the spindle is fixedly connected inside the grinding machine body, a spindle through hole 101 matched with the spindle is formed in the middle of the vibration sensor 1, a closed pigment circulating flow channel 102 is formed in the inner wall of the vibration sensor 1, an unclosed overflow channel 103 is formed outside the pigment circulating flow channel 102 of the vibration sensor 1, a plurality of communicating channels 104 are communicated between the pigment circulating flow channel 102 and the overflow channel 103, a circulating loop is formed between the bottom and the upper part of the pigment circulating flow channel 102 through a pipeline, the communicating channels 104 are all arranged upward based on a horizontal line, and as the communicating channels 104 are communicated with the pigment circulating flow channel 102, in order to prevent the liquid pigment in the pigment circulating flow channel 102 from directly entering the communication channel 104, the communication channel 104 is inclined upwards, so that the pigment can overflow into the communication channel 104 after the thermal expansion ball 6 blocks the pigment circulating flow channel 102, and the communication channels 104 positioned on the left side and the right side of the center point of the main shaft through hole 101 are symmetrically arranged;

referring to fig. 6 and 7, a plurality of sliding grooves 2 communicated with the pigment circulating flow channel 102 are formed in the side wall of the main shaft through hole 101, a friction heat generating member 3 matched with the shape of the main shaft is slidably connected in the sliding groove 2 (the distance between the friction heat generating member 3 and the main shaft can be set according to the minimum distance allowing the main shaft to radially jump and can be determined according to specific conditions), the friction heat generating member 3 comprises an arc heat generating plate and a heat conducting rod slidably connected with the sliding groove 2, the heat generating plate is made of a friction-resistant material (known to those skilled in the art), when the main shaft vibrates, the friction heat generating member 3 rubs with the surrounding friction heat generating members 3 due to radial jumping to generate friction heat, and further generates friction heat, a limit support member 4 is fixedly connected between each friction heat generating member 3 and the side wall of the main shaft through hole 101, the limit support member 4 is made of a high-elasticity material (preferably, and can be selected according to actual requirements), the limiting support member 4 is a three-dimensional net structure, the limiting support member 4 not only has a positioning effect on the friction heat generating member 3 to prevent the friction with the friction heat generating member 3 when the main shaft does not vibrate, but also the elastic force of the limiting support member 4 can absorb a part of the vibration force of the main shaft to reduce the vibration to a certain extent, the inner wall of the sliding groove 2 close to the friction heat generating member 3 is fixedly connected with an isolation membrane 5, the middle position between the isolation membrane 5 and the sliding groove 2 is fixedly connected with a thermal expansion ball 6, the distance between the isolation membrane 5 and the thermal expansion ball 6 is larger than the distance between the isolation membrane 5 and the friction heat generating member 3, and the isolation membrane 5 is made of a soft elastic material (preferably a silica gel material, and other materials with good toughness can be selected according to actual requirements), so as to ensure that the isolation membrane 5 does not obstruct the heat absorption expansion of the thermal expansion ball 6, and the isolation membrane 5 can also have a sealing effect, the liquid pigment is prevented from flowing out of the sliding groove 2, the diameter of the thermal expansion ball 6 is larger than the inner diameter of the pigment circulating flow channel 102, and the thermal expansion ball 6 is positioned at the central point of the pigment circulating flow channel 102 communicated with the sliding groove 2, so that the thermal expansion ball 6 can completely seal the pigment circulating flow channel 102 after absorbing heat and expanding, the pigment can smoothly overflow from the pigment circulating flow channel 102 to the overflow channel 103, and a plurality of heat conducting soft wires 301 penetrating through the isolation film 5 are fixedly connected between the thermal expansion ball 6 and the friction heat generating piece 3;

referring to fig. 3 and 10, a color developing shell 7 is fixedly connected to a side wall of a grinding machine body, a transparent plate 701 is rotatably connected to a side wall of the color developing shell 7 facing to the outside through a hinge, an open end of the transparent plate 701 is attracted to the color developing shell 7 through a magnet, a liquid guiding member 9 (known to a person skilled in the art) is fixedly connected to the inside of the color developing shell 7, a liquid guiding belt 8 (known to a person skilled in the art) penetrating to the bottom of the overflow channel 103 is embedded in a back portion of the liquid guiding member 9, the liquid guiding member 9 includes a liquid separating plate 901 connected to the liquid guiding belt 8, a liquid absorbing plate 902 provided with capillaries is fixedly connected to a side wall of the liquid separating plate 901 far from the liquid guiding belt 8, the capillaries enable the liquid absorbing plate 902 to actively absorb liquid pigment on the liquid separating plate 901, white absorbent paper (white absorbent paper is also selected and can be used for saving paper) is pasted on the liquid absorbing plate 902, the liquid pigment overflowing to the overflow channel 103 is transferred to the liquid separating plate 901 through the liquid guiding belt 8, the liquid absorbing plate 902 actively absorbs the pigment from the liquid separating plate 901 by utilizing the capillary phenomenon to further soak the white absorbent paper, the liquid guiding belt 8 and the liquid separating plate 901 are made of high liquid guiding resin materials, and the liquid guiding performance of the liquid separating plate 901 is greater than that of the liquid guiding belt 8, so that the liquid pigment can be quickly transmitted to the liquid separating plate 901, and the color can be quickly developed on the absorbent paper.

Referring to fig. 8 and 9, the method of using the apparatus includes the following steps:

s1, before the grinder is started to operate, the transparent plate 701 is opened to stick white absorbent paper on the liquid absorption plate 902, and then liquid pigment is injected into the pigment circulating flow channel 102 from the top of the vibration sensor 1;

s2, starting the grinder to operate, when the grinding wheel vibrates in the rotating process, the main shaft rubs with the friction heat generating pieces 3 around due to the rotation deviation, the generated friction heat is transferred to the thermal expansion balls 6 to expand and enlarge the thermal expansion balls, so that the liquid pigment in the pigment circulating flow channel 102 overflows into the overflow channel 103, and finally color is developed on the white absorbent paper through the conduction action of the liquid guide belt 8 and the liquid guide piece 9, and workers can timely perceive the vibration of the grinding wheel;

s3, when the grinding wheel does not vibrate, the liquid pigment circulates in the pigment circulating flow channel 102, and the white absorbent paper does not show color.

The vibration sensor 1 and the color developing shell 7 are additionally arranged on the basis of the existing grinding wheel spindle to detect the vibration of the grinding wheel in advance, so that the stable operation of the grinding wheel is effectively improved, the friction heat generation piece 3 is arranged in the vibration sensor 1 to generate friction with the vibrating grinding wheel spindle and further generate friction heat, the heat is transferred to the thermal expansion ball 6 to expand and block the pigment circulating flow channel 102 in which liquid pigment flows, so that the pigment in the pigment circulating flow channel 102 overflows into the overflow channel 103, the pigment is displayed on the water absorption paper in the color developing shell 7 by using the liquid guiding effect of the liquid guiding belt 8 and the liquid guiding piece 9, a worker can see the vibration of the grinding wheel in advance so as to take adjustment measures in time, the worker can know the condition at a position far away from the grinding machine, and the danger when the worker approaches to check can be effectively reduced, and also to avoid the worker from sucking the splashed fine sand and metal chips.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.