CN112902837A

CN112902837A - Knife detection instrument and knife detection method applied to same

Info

Publication number: CN112902837A
Application number: CN202011598486.5A
Authority: CN
Inventors: 丁朝辉; 许国敏; 庞少勇; 苏雪锋; 刘晓雯; 徐勤锋; 申利国; 朱华东
Original assignee: Shanxi Yuding Precision Technology Co Ltd
Current assignee: Shanxi Yuding Precision Technology Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-06-04

Abstract

The application provides an appearance is examined to sword for produce the sword when being touched by the cutter and examine the signal, for outside board basis the position of sword signal calculation cutter is examined to the sword includes: the detection device comprises a shell, a detection device and a detection device, wherein the top surface or the side surface of the shell is provided with a detection port; a trigger assembly for being touched by the tool in mutually perpendicular X, Y or Z directions, wherein the Z direction is a vertical direction and the X, Y direction is two mutually perpendicular directions within a horizontal plane perpendicular to the Z direction; the detection assembly comprises a sensing circuit, the trigger assembly is connected to the detection assembly through the detection port, the trigger assembly is touched by the cutter to change the state of the sensing circuit of the detection assembly from a path to an open circuit and generate a cutter detection signal. The application also provides a knife detection method using the knife detection instrument. The cutter detection instrument and the cutter detection method can sense the touch of the cutter from multiple directions, timely respond to the touch of the cutter and timely generate cutter detection signals so as to measure the relevant parameters of the cutter in multiple directions.

Description

Knife detection instrument and knife detection method applied to same

Technical Field

The application relates to cutter inspection field especially relates to cutter check out test set.

Background

Different cutters are generally used for machining in the machining process of products in the existing mechanical manufacturing industry, due to the limitation of traditional cutter detection, the cutter detection device can only be used for detecting Z-direction dimension, wrong cutter replacement, cutter deflection, cutter abrasion and cutter breakage cannot be accurately detected, in order to guarantee product quality, firstly, failure modes of the cutters (such as wrong cutter replacement, cutter deflection out-of-tolerance, cutter abrasion out-of-tolerance, cutter breakage and the like) need to be accurately detected, but all failure modes of the cutters cannot be accurately detected through traditional cutter detection, cutter abrasion and breakage conditions are controlled close to a single set service life at the present stage, complete coverage cannot be achieved, and abnormal product structures can be caused.

How to solve the above problems needs to be considered by those skilled in the art.

Disclosure of Invention

In view of this, the present application provides a tool checking apparatus for generating a tool checking signal when touched by a tool, so that an external machine can calculate a position of the tool according to the tool checking signal, the tool checking apparatus includes:

the detection device comprises a shell, a detection device and a detection device, wherein the top surface or the side surface of the shell is provided with a detection port;

a trigger assembly for being touched by the tool in mutually perpendicular X, Y or Z directions, wherein the Z direction is a vertical direction and the X, Y direction is two mutually perpendicular directions within a horizontal plane perpendicular to the Z direction; and

the detection assembly comprises a sensing circuit, the detection assembly is connected to the trigger assembly through the detection port, and the sensing circuit of the detection assembly is changed from a passage state to an open state when the trigger assembly is touched by the cutter and generates the cutter detection signal.

In one possible embodiment, the trigger assembly comprises:

the connecting piece is perpendicular to the plane of the detection port and is connected to the detection assembly through the detection port; and

the trigger piece is coaxially connected with the connecting piece when the detection port is formed in the top surface of the shell, and is vertically connected with the connecting piece when the detection port is formed in the side surface of the shell, so that the trigger piece can be touched by the cutter in the X, Y or Z direction.

In a possible embodiment, the trigger piece has a trigger part and a support part which is integrally formed with the trigger part or detachably fixedly connected to the trigger part, the trigger part is connected to the connecting piece via the support part, the trigger part is coaxial with the connecting piece or the axes of the two are perpendicular to each other, and the diameter of the trigger part is larger than that of the support part.

In a possible embodiment, the detecting assembly further includes a tripod, a ball frame and a power circuit, the tripod includes an insulating body fixedly connected with the triggering assembly and three legs electrically conductive but electrically isolated from each other, the ball frame includes an insulating accommodating part for accommodating the tripod and providing the tripod with movement and six conductive balls disposed around the insulating accommodating part, the power circuit and the three legs and the six conductive balls form the sensing circuit, and when the triggering assembly is touched by the tool in the X, Y or Z direction, the sensing circuit is enabled to be changed into an open circuit state by triggering the corresponding leg and the corresponding conductive ball to separate, so that the sensing circuit generates the tool detecting signal.

In one possible embodiment, the six conductive balls are divided into two groups each into a first conductive ball group having a first conductive ball and a sixth conductive ball, a second conductive ball group having a second conductive ball and a fourth conductive ball, and a third conductive ball group having a third conductive ball and a fifth conductive ball, the six conductive balls are arranged at intervals, the two conductive balls of each group are in separable electrical contact with one of the legs arranged between the two conductive balls, the fourth conductive ball of the second conductive ball group and the third conductive ball adjacent to the fourth conductive ball of the adjacent third conductive ball group are electrically connected to the positive electrode and the negative electrode of the power circuit, respectively, the sixth conductive ball of the first conductive ball group is electrically connected to the fifth conductive ball of the adjacent third conductive ball group, the second conductive balls in the second conductive ball group are electrically connected with the adjacent first conductive balls in the first conductive ball group.

In a possible embodiment, the tripod is in transmission connection with the trigger assembly, and the tripod moves along with the trigger assembly when the trigger assembly is touched by the cutter to move, so that at least one supporting leg in the tripod is separated from the conductive ball in electrical contact with the supporting leg, and the sensing circuit is changed from a passage state to an open state.

In a possible embodiment, three of the legs are disposed on the insulating body, the three legs are spaced apart from each other, and two of the conductive balls detachably contacting with one of the legs are disposed on opposite sides of the one of the legs.

In a possible embodiment, the knife detector further comprises a blowing bracket connected to the housing, the blowing bracket comprising a nozzle capable of ejecting gas, the nozzle being arranged towards the trigger assembly for ejecting gas towards the trigger assembly before the trigger assembly is touched by the knife each time to clean the surface of the trigger assembly to be touched by the knife.

The present application also provides a tool checking method for checking a tool using a tool checking instrument as described above in mutually perpendicular X, Y or Z directions, where the Z direction is a vertical direction and the X, Y direction is two mutually perpendicular directions within a horizontal plane perpendicular to the Z direction, the method comprising:

replacing a cutter;

enabling the cutter to touch the tool checking instrument in the Z direction, wherein the tool checking instrument generates a Z-direction detection signal when being touched by the cutter in the Z direction;

touching the tool to the tool detector in a single one of the X or Y directions, wherein the tool detector generates a single direction detection signal when touched by the tool in the single direction;

obtaining the coordinate of the cutter in the Z direction according to the Z-direction detection signal so as to calculate the length of the cutter;

obtaining the coordinate of the cutter in the single direction according to the single direction detection signal so as to calculate the diameter of the cutter;

judging whether the length of the cutter and the diameter of the cutter exceed the range of the predetermined cutter standard length and cutter standard diameter or not, wherein when at least one of the length of the cutter and the diameter of the cutter exceeds the range of the predetermined cutter standard length and cutter standard diameter, the cutter is determined to be changed by mistake, and an alarm is given; and when the length of the cutter and the diameter of the cutter do not exceed the range of the predetermined cutter standard length and cutter standard plate, determining that the cutter is not changed.

In one possible embodiment, after determining that the tool has not been swapped, the method further comprises:

enabling the cutter to touch the tool checking instrument in the single direction, wherein the cutter rotates for a circle every other preset angle, the cutter touches the tool checking instrument once after rotating for the preset angle every time, and the tool checking instrument generates a single-direction detection signal when being touched by the cutter in the single direction every time;

obtaining a plurality of unidirectional coordinates of the cutter according to the generated unidirectional detection signals, and subtracting the minimum value from the maximum value in the plurality of unidirectional coordinates to obtain a yaw value of the cutter;

judging whether the deflection value of the cutter exceeds the predetermined range of the standard deflection value of the cutter or not, wherein when the deflection value of the cutter exceeds the predetermined range of the standard deflection value of the cutter, the deflection out-of-tolerance of the cutter is determined, and an alarm is given; and when the deflection value of the cutter does not exceed the range of the predetermined standard deflection value of the cutter, determining that the deflection of the cutter is normal.

In a possible embodiment, after determining that the tool is deflected normally, the method further comprises:

detecting a blade angle and a blade value of a maximum edge of the tool in the single direction, and saving the blade angle and the blade value;

and after preservation, the cutter is used for processing production.

In a possible embodiment, after a certain period of machining production using the tool, the method further comprises:

the step of enabling the cutter to touch the tool checking instrument in the Z direction is carried out again at intervals of first preset time, so that the length of the cutter is calculated again;

judging whether the recalculated cutter length exceeds the range of the predetermined cutter standard length, wherein the cutter length is determined to be abnormal and an alarm is given whenever the calculated cutter length exceeds the range of the predetermined cutter standard length; and determining that the tool length is normal whenever the calculated tool length does not exceed the range of the predetermined tool standard length.

In one possible embodiment, the method further comprises:

performing the step of enabling the cutter to touch the tool checking instrument in the single direction again at intervals of second preset time so as to calculate the diameter of the cutter again;

judging whether the recalculated tool diameter exceeds the range of the predetermined tool standard diameter, wherein when the calculated tool diameter exceeds the range of the predetermined tool standard diameter, the tool is determined to be excessively worn, and an alarm is given; the tool wear is determined to be within the normal wear range whenever the calculated tool diameter does not exceed the predetermined range of tool standard diameters.

In one possible embodiment, the method further comprises:

performing the step of enabling the cutter to touch the tool detector in the single direction again every third preset time so as to calculate the deflection value of the cutter again;

judging whether the recalculated tool yaw value exceeds the range of the predetermined tool yaw value, wherein the tool yaw out-of-tolerance is determined and an alarm is given whenever the calculated tool yaw value exceeds the range of the predetermined tool yaw value; and determining that the tool deflection is normal when the calculated tool deflection value does not exceed the range of the predetermined tool deflection value.

In one possible embodiment, the method further comprises:

detecting the blade angle and the blade value again every fourth preset time;

judging whether the difference value between the edge angle and the edge value which are detected again and the stored edge angle and the stored edge value exceeds a predetermined tool chipping range or not, wherein tool chipping is determined and an alarm is given whenever the difference value exceeds the predetermined tool chipping range; and when the difference value does not exceed the predetermined tool chipping range, continuing the machining production by using the tool.

The utility model provides an appearance is examined to sword through setting up trigger piece, connecting piece and the tripod that the segmentation is connected, wherein the trigger piece can the sensing come from a plurality of directions the touching of cutter to transmit this touching produced displacement or motion to the tripod via the connecting piece, and is further, but through the electric contact mode who sets up the stabilizer blade and the electric contact formula of conductive ball, make the appearance is examined to the sword possess sensitive touching sensing ability, the appearance can in time respond to the sword is examined the touching of cutter in a plurality of directions and in time produces the signal is examined to the sword makes outside board in time intervene and measure the relevant parameter of cutter in a plurality of directions.

The cutter checking method comprises the steps of using the cutter checking instrument with the detection capability on the cutters in multiple directions as mentioned above, relying on the sensitivity of the cutter checking instrument in multiple directions to sense the touch of the cutters in different directions and further acquiring a plurality of cutter parameters of the cutters, such as cutter length, cutter diameter, deflection value, abrasion degree, tipping degree and the like, so that the cutters can be detected after new cutters are installed and in the machining process, meanwhile, a machine table can be assisted to timely replace the cutters which do not meet the machining requirements or realize automatic machining compensation of the cutters in the machining process, and the machining quality and the machining efficiency are effectively improved.

Drawings

Fig. 1 is a schematic perspective view of a knife detector according to an embodiment of the present application.

Fig. 2 is a partial perspective view of a knife detector according to an embodiment of the present application.

Fig. 3 is a schematic perspective view of the detection assembly of the knife detector according to an embodiment of the present application, as viewed from a side facing the detection assembly when the detection assembly is connected to the trigger assembly.

Fig. 4 is a schematic perspective view of the detection assembly of the knife detector according to an embodiment of the present application, as viewed from a side facing the trigger assembly when the detection assembly is connected to the trigger assembly.

Fig. 5 is a schematic diagram of distribution of conductive balls of a detection assembly of the knife detector according to an embodiment of the present application.

Fig. 6 is a perspective view of a knife detector according to another embodiment of the present application.

Fig. 7 is a schematic flow chart of a knife inspection method according to an embodiment of the present application.

FIG. 8 is a diagram illustrating tool parameters according to an embodiment of the present application.

Description of the main elements

Knife

tester

10, 20

Case

11, 21

Detection port

110, 210

Top surfaces

111, 211

Side surfaces

112, 212

Bottom surfaces

113, 213

Trigger assemblies

12, 22

Connecting

pieces

121, 221

Trigger

122, 222

Trigger parts

1221, 2221

Support portions

1222, 2222

Detection assembly

13, 23

Tripod 131

Insulating body 1311

Feet 1312

Ball rack 132

Insulating accommodating part 1321

Conductive ball 1322

First conductive balls 1351

Second conductive balls 1352

Third conductive ball 1353

Fourth conductive ball 1354

Fifth conductive ball 1355

Sixth conductive ball 1356

First conductive ball group 1361

Second conductive ball set 1362

Third conductive ball set 1363

Power supply circuit 133

Conductive probe 134

Base

14, 24

Air blowing support 15

First body 151

Nozzle 152

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The following description will refer to the accompanying drawings to more fully describe the present disclosure. There is shown in the drawings exemplary embodiments of the present application. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals designate identical or similar components.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, as used herein, the terms "comprises," "comprising," "includes" and/or "including" or "having" and/or "having," integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, unless otherwise defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application and will not be interpreted in an idealized or overly formal sense.

The following description of exemplary embodiments refers to the accompanying drawings. It should be noted that the components depicted in the referenced drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar terms.

Embodiments of the present application will now be described in further detail with reference to the accompanying drawings.

First embodiment

Fig. 1 is a perspective view of a knife detector 10 according to an embodiment of the present disclosure; fig. 2 is a partial perspective view of a knife detector 10 according to an embodiment of the present disclosure; fig. 1 and 2 are described in conjunction because some of the elements are enclosed by the housing and there is shielding. A knife detection instrument 10 is used for generating a knife detection signal when being touched by a knife so as to enable an external machine to calculate the position of the knife according to the knife detection signal, and the knife detection instrument 10 comprises a shell 11, a trigger component 12, a detection component 13 and an optional base 14; the housing 11 at least includes a top surface 111, a side surface 112, and a bottom surface 113, where the bottom surface 113 is fixed to the base 14 and is disposed on a working table of an external machine through the base 14, the top surface 111 is a surface of the housing 11 opposite to the bottom surface 113, and the side surface 112 is a side surface of the housing 11 and is disposed between the top surface 111 and the bottom surface 113.

The trigger assembly 12 is adapted to be touched by a tool in mutually perpendicular X, Y or Z directions, wherein the Z direction is a vertical direction and the X, Y direction is two mutually perpendicular directions within a horizontal plane perpendicular to the Z direction. The detecting assembly 13 includes a sensing circuit, a side surface 112 of the housing 11 is opened with a detecting opening 110, the detecting assembly 13 is connected to the triggering assembly 12 through the detecting opening 110, the sensing circuit of the detecting assembly 13 is changed from a closed state to an open state when the triggering assembly 12 is touched by the tool, and generates a tool detection signal. The detailed construction of the sensing circuit will be described in detail below.

The tool checking apparatus 10 further includes a blow bracket 15 connected to the housing 11 and configured to blow gas toward the trigger assembly 12 before the trigger assembly 12 is touched by the tool each time to clean the surface of the trigger assembly 12 to be touched by the tool (e.g., residual metal chips, oil stains on the surface). In one embodiment, the blowing bracket 15 includes a first body 151 and a nozzle 152, the first body 151 can be connected to the housing 11 and is used for communicating with the compressed air from the outside, and the nozzle 152 is disposed toward the trigger assembly 12 and ejects the air to remove the dirt.

The trigger assembly 12 includes a connecting member 121 and a trigger member 122, the connecting member 121 is perpendicular to the plane of the detecting opening 110 and is connected to the detecting assembly 13 through the detecting opening 110, and the trigger member 122 is perpendicular to the connecting member 121 when the detecting opening 110 is opened on the side surface 112 of the housing 11, so as to be touched by the tool in X, Y or Z direction and drive the connecting member 121 to displace.

The trigger 122 has a trigger portion 1221 and a support portion 1222 integrally formed with or detachably fixedly connected to the trigger portion 1221, the trigger portion 1221 is connected to the connecting member 121 via the support portion 1222, the trigger portion 1221 is coaxial with the support portion 1222, axes of both the trigger portion 1221 and the connecting member 121 are perpendicular to each other, and a diameter of the trigger portion 1221 is larger than a diameter of the support portion 1222.

The supporting portion 1222 may be a column, one end of the supporting portion 1222 is connected to the triggering portion 1221, the other end of the supporting portion 1222 is connected to the connecting member 121, the triggering portion 1221 is located on the side of the supporting portion 1222 away from the connecting member 121, the diameter of the triggering portion 1221 is larger than that of the supporting portion 1222 to increase the detection range of the triggering member 122 for detecting the tool, when the tool contacts the triggering portion 1221, the triggering portion 1221 is displaced along the moving direction (touch direction) of the tool, and further drives the connecting member 121 to be displaced, and the connecting member 121 further transmits the movement generated by the displacement to the detecting assembly 13.

The detecting element 13 further includes a power circuit 133, and the power circuit 133 transmits the electrical signal generated by the detecting element 13 to an external machine and provides power for the detecting element 13.

Note that, the arrow near the triggering portion 1221 in fig. 1 indicates the direction in which the tool is about to touch, and the arrow indication mode in other figures is also applicable.

Fig. 3 is a schematic perspective view of the knife detector 10 according to the embodiment of the present invention, as viewed from the side facing the detection element 13 when the detection element 13 is connected to the trigger element 12, and fig. 4 is a schematic perspective view of the knife detector 10 according to the embodiment of the present invention, as viewed from the side facing the trigger element 12 when the detection element 13 is connected to the trigger element 12, and since there is an angle block, fig. 3 and 4 will be described in combination.

The sensing assembly 13 further includes a tripod 131 and a ball mount 132. The tripod 131 comprises an insulating body 1311 fixedly connected with the triggering assembly 12 and three legs 1312 conductive themselves but electrically isolated from each other; the ball rack 132 includes an insulating receptacle 1321 for receiving the tripod 131 and allowing the tripod 131 to move, and six conductive balls 1322 disposed around the insulating receptacle 1321, the power circuit 133 is electrically connected to the three legs 1312 and the six conductive balls 1322 to form a sensing circuit, when the trigger assembly 12 is touched by a tool in X, Y or Z direction, the tripod 131 moves when the trigger assembly 12 is touched by the tool and moves, and the corresponding leg 1312 and the corresponding conductive ball 1322 of the corresponding leg 1312 are triggered to separate, so that the sensing circuit is changed from a pass-through state to an open-circuit state, so that the sensing circuit generates a tool detection signal. At this time, the external machine station can obtain the current coordinates of the tool relative to the coordinate system of the tool inspection instrument 10 and the coordinates relative to the coordinate system of the machine station according to the tool inspection signal, and can calculate the related parameters of the tool through the two coordinates, wherein the calculation of the related parameters is specifically described in the method embodiment below.

The insulating body 1311 may be tapered, the narrower end of the insulating body 1311 passes through the opening of the insulating receptacle 1321 to connect with the connecting element 121 and achieve transmission, and the insulating receptacle 1321 is at least sleeved on the wider end of the insulating body 1311 and cooperates with the insulating body 1311 to position the conductive balls 1322, so that the conductive balls 1322 will not actively disengage from the supporting legs 1312.

Three support legs 1312 are disposed at an end of the insulating body 1311 away from the trigger assembly 12, the three support legs 1312 are spaced apart, and two conductive balls 1322 which are detachably connected to one support leg 1312 are disposed on opposite sides of the support leg 1312. For example, the three conductive legs 1312 are uniformly spaced along the longitudinal center line of the insulating body 1311, and the three legs 1312 are uniformly distributed, so that the tool checking instrument 10 has high sensitivity to tools touching in all directions.

The detection assembly 13 also includes a plurality of electrically conductive probes 134. For example, as shown in fig. 3, six conductive probes 134 are shown, wherein two conductive probes 134 are connected to one end of each conductive probe 134 through a conducting wire, two conductive balls 1322 are connected to two opposite ends of the two connected conductive probes 134 and are electrically connected to the two conductive balls 1322, the two conductive balls 1322 connected to the two conductive probes 134 respectively correspond to different support legs 1312, and the conductive probes 134 are not in contact with the support legs 1312; the other two conductive probes 134 are connected in a similar manner as the two conductive probes 134 described herein; the remaining two conductive probes 134 are not connected to each other by conductive wires, but one conductive ball 1322 is connected to one end of each conductive probe 134 of the remaining two conductive probes 134, and the other end is connected to the power circuit 133, so that the conductive ball 1322 and the supporting leg 1312 are in electrical contact with the power circuit 133 to form a sensing circuit with a pass-through state.

Fig. 5 is a schematic distribution diagram of the conductive balls 1322 of the detecting assembly 13 of the knife detector 10 according to an embodiment of the present application.

Six conductive balls 1322, two each, are divided into a first conductive ball group 1361 having first and sixth

conductive balls

1351 and 1356, a second conductive ball group 1362 having second and fourth

conductive balls

1352 and 1354, and a third conductive ball group 1363 having third and fifth

conductive balls

1353 and 1355.

The six conductive balls 1322 are spaced apart from each other, each set of two conductive balls 1322 is in separable electrical contact with one of the legs 1312 disposed between the two conductive balls 1322, and the plurality of conductive balls 1322 are electrically connected to each other via the conductive probe 134. For example, the conductive ball 1322 can be in contact with and electrically connected to the supporting leg 1312, and when the position of the supporting leg 1312 changes, the supporting leg 1312 is out of contact with the contacted conductive ball 1322, so that the sensing circuit in the on state changes to an open state, and a knife detection signal is generated.

In one embodiment, the first conductive balls 1351, the second conductive balls 1352, the fourth conductive balls 1354, the third conductive balls 1353, the fifth conductive balls 1355, and the sixth conductive balls 1356 may be arranged in a clockwise direction; in one embodiment, as shown in fig. 5, a fourth conductive ball 1354 of the second conductive ball group 1362 and a third conductive ball 1353 of the third conductive ball group 1363 adjacent to the fourth conductive ball 1354 are electrically connected to the positive electrode and the negative electrode of the power circuit 133, respectively, a first conductive ball 1351 and a second conductive ball 1352 of the other four conductive balls are electrically connected through the conductive probe 134, and a fifth conductive ball 1355 and a sixth conductive ball 1356 are electrically connected through the conductive probe 134. However, the present application is not limited thereto, and in other embodiments, for example, a first conductive ball 1351 in a first conductive ball group 1361 and a second conductive ball 1352 adjacent to the first conductive ball 1351 in an adjacent second conductive ball group 1362 are electrically connected to a positive electrode and a negative electrode of the power circuit 133, respectively, a sixth conductive ball 1356 in the first conductive ball group 1361 and an adjacent fifth conductive ball 1355 in the third conductive ball group 1363 are electrically connected through the conductive probe 134, and a fourth conductive ball 1354 in the second conductive ball group 1362 and an adjacent third conductive ball 1353 in the third conductive ball group 1363 are electrically connected through the conductive probe 134.

In an embodiment, when the tool touches the trigger assembly 12, at least one of the spatial coordinates of the trigger assembly 12 in the three-dimensional coordinate system is changed, so as to drive the tripod 131 to shift, so that at least one of the first conductive ball set 1361, the second conductive ball set 1362 and the third conductive ball set 1363 is separated from the contact with the supporting leg 1312, and further, the sensing circuit at least including the conductive ball 1322, the supporting leg 1312 and the conductive probe 134 is opened from the via and generates a tool detection signal.

In other embodiments, the number of conductive balls 1322 may be other than that shown, and the number of legs 1312 may be half that of conductive balls 1322, with from one leg 1312 to less than one conductive ball 1322 making electrical contact.

Second embodiment

Fig. 6 is a perspective view of a knife detector 20 according to another embodiment of the present disclosure. The knife detector 20 comprises a housing 21, a trigger assembly 22, a detection assembly 23 and an optional base 24, wherein the housing 21 at least comprises a top surface 211, a side surface 212 and a bottom surface 213, the housing 21 is provided with a detection port 210, and the trigger assembly 22 comprises a connecting member 221 and a trigger piece 222. The knife detector 20 differs from the knife detector 10 provided in the first embodiment in that: the knife inspection instrument 10 is of a horizontal arrangement structure, the knife inspection instrument 20 is of a vertical arrangement structure, wherein the detection port 210 is formed in the top surface 211, the base 24 is connected to the side surface 212, the trigger piece 222 is coaxially connected with the connecting piece 221, the trigger part 2221 of the trigger piece 222 is coaxially connected with the support part 2222, and the support part 2222 of the trigger piece 222 is coaxially connected with the connecting piece 221.

It will be appreciated that other configurations of the knife detector 20 and of the knife detector 10 may be identical and have the same function of sensing the touch of the knife and generating a knife detection signal.

The utility model provides an appearance is examined to sword, trigger piece through setting up the segmentation and connecting, connecting piece and tripod, wherein the touching that the sensing of trigger piece comes from the cutter on the equidirectional, and transmit this touching produced displacement or motion to the tripod via the connecting piece, furthermore, but through the electric contact mode who sets up the stabilizer blade and the electric-separation formula of conductive ball, make the appearance is examined to the sword possess sensitive touching sensing ability, the appearance is examined to the sword can in time respond to the touching of cutter in a plurality of directions and in time produce the sword and examine the signal, make outside board in time intervene and measure the relevant parameter of cutter in a plurality of directions.

Third embodiment

As shown in fig. 7, a schematic flow chart of a knife inspection method is also provided for the present application. The knife inspection method applied to the knife inspection instrument 10 will be described below by taking only the knife inspection instrument 10 in the "horizontal" placement structure as an example.

When the cutter touches the cutter checking instrument 10, the cutter checking instrument 10 sends out a cutter checking signal, an external machine controls the cutter to stop moving and obtains the current three-dimensional position coordinate of the cutter, the current three-dimensional position coordinate is compared with the initial position coordinate of the cutter from the testing position, the absolute value of the difference of at least one position coordinate is obtained, the absolute value of the difference is the displacement value of the cutter in the direction, and the parameter of the cutter can be judged by calling the corresponding displacement value of the standard cutter under the same detection action and comparing the two displacement values.

The knife detection method provided by the application is used for detecting a knife by using the knife detector 10 in the X, Y or Z directions which are vertical to each other, wherein the Z direction is a vertical direction, the X, Y direction is two directions which are vertical to each other in a horizontal plane which is vertical to the Z direction, and the method comprises a new knife setting flow process, and comprises the following steps:

replacing a cutter;

the tool is made to touch the tool checking instrument 10 in the Z direction, wherein the tool checking instrument 10 generates a Z-direction detection signal when touched by the tool in the Z direction;

touching the tool to the tool detector 10 in a single one of the X or Y directions, wherein the tool detector 10 generates a single direction detection signal when touched by the tool in the single direction;

obtaining the coordinate of the cutter in the single direction according to the single-direction detection signal, and calculating the diameter of the cutter according to a preset coordinate difference value;

judging whether the length of the cutter and the diameter of the cutter exceed the range of the predetermined standard length of the cutter and the predetermined standard diameter of the cutter or not, wherein when at least one of the length of the cutter and the diameter of the cutter exceeds the range of the predetermined standard length of the cutter and the predetermined standard diameter of the cutter, the cutter is determined to be changed by mistake, and an alarm is given; and when the length of the cutter and the diameter of the cutter do not exceed the range of the predetermined cutter standard length and cutter standard plate, determining that the cutter is not changed.

Here, as shown in fig. 8, the diameter of the cutter and the length of the cutter are illustrated in fig. 8 (a).

In this case, if it is determined to replace the wrong tool, the tool is reinstalled and the tool is detected from the initial step; after determining that no tool is changed by mistake, continuing to perform new tool setting, wherein the method further comprises the following steps:

enabling the cutter to touch the tool checking instrument in a single direction, wherein the cutter rotates for a circle every a preset angle, the cutter touches the tool checking instrument once after rotating for the preset angle every time, and the tool checking instrument generates a single-direction detection signal when being touched by the cutter in the single direction every time;

obtaining a plurality of unidirectional coordinates of the cutter according to the generated unidirectional detection signals, and subtracting the minimum value from the maximum value in the plurality of unidirectional coordinates to obtain a deflection value of the cutter;

judging whether the deflection value of the cutter exceeds the range of a predetermined cutter standard deflection value or not, wherein when the deflection value of the cutter exceeds the range of the predetermined cutter standard deflection value, the deflection out-of-tolerance of the cutter is determined, and an alarm is given; and when the deflection value of the cutter does not exceed the range of the predetermined standard deflection value of the cutter, determining that the deflection of the cutter is normal.

Here, when it is judged whether the yaw value of the tool exceeds the range of the predetermined tool standard yaw value, the tool is mounted on a spindle of an external machine (e.g., a CNC machine), and the tool itself is rotated by the rotation of the spindle. For example, the spindle rotates every 30 degrees, that is, the tool rotates every 30 degrees until it rotates once (360 degrees), and after each rotation of 30 degrees, the tool in the non-rotation state touches the tool detector before the next rotation. In this way, 12 times of data can be obtained through the tool checking instrument after rotating for one circle, wherein the difference between the maximum value and the minimum value in the 12 times of data is the deflection value of the tool. The angle of each rotation is set at least in accordance with the detection cycle and the detection accuracy, and for example, in order to speed up the detection progress, the angle of each rotation may be set to be greater than 30 degrees; in order to improve the detection accuracy, the rotation angle per rotation of less than 30 degrees may be set.

Here, as shown in fig. 8, the tool runout is illustrated in fig. 8 (b).

Under the condition, if the deflection of the cutter is determined to be out of tolerance, alarming, reinstalling the cutter and starting to detect the cutter from the initial step; after the tool deflection is determined to be normal, the tool setting of a new tool is continued, and the method further comprises the following steps:

detecting a blade angle and a blade value of a maximum blade of the cutter in a single direction, and saving the blade angle and the blade value;

it can be understood that, in the above steps of the method, the blade edge can be detected by the least bisection method, in a fan-shaped rotating area which can contain the blade edge, the attenuation ratio of the rotating range which is detected in each time is half, the detected values in the two parts which are equally divided in the detection process are sequentially compared in each detection process, the part in which the larger value is located is taken as the continuous detection part, and the detection is continuously carried out by taking the attenuation ratio of the rotating range which is detected in each time is half until the positions of a plurality of blade edges are determined and the corresponding angle alpha between the adjacent blade edges is recorded.

Here, as shown in fig. 8, the edge value and the edge angle of the cutter are illustrated in fig. 8(a) and 8(c), respectively.

Specifically, the tool may be rotated at least once to make multiple touches with the tool checking device 10, for example, within a circle (360 °), the tool may be rotated at least 12 times, and the 12 times are recorded and detected respectively, and the maximum value among the 12 times is screened, that is, the maximum value a; then, the blade is rotated clockwise and anticlockwise by a first preset angle by taking the coordinate corresponding to the maximum value as an origin (a main axis of the symmetry center), and the blade is ensured to cover in a sector area expanded in the rotating process; and then, rotating the first angle clockwise to detect a B value, rotating the first preset angle anticlockwise to detect a C value, if A is larger than B and larger than C, taking a D value between A, B and (A + B)/2, if A is larger than D and larger than B, taking an F value between A, D and (A + D)/2, if A is larger than F and larger than D, taking an H value between A, F and (A + F)/2, repeating the steps for a plurality of times (7 times) in the same way, rotating, detecting and comparing to screen out the coordinate value of the cutting edge, and then acquiring an angle alpha which is recorded by an external machine and corresponds to the cutting edge, thereby obtaining the cutting edge value and the cutting edge angle.

It should be noted that the setting of 12 rotations is determined in the case of a compromise between the processing cycle, the resolution of the minimum rotation angle of the external machine, and the detection accuracy, for example: in one type of machine, if the rotation is more than 12 times, the detection accuracy can be improved, but the angle of each rotation of more than 12 times is less than 30 degrees, and the minimum angle obtained by 7 dichotomy on the angle less than 30 degrees is less than the minimum rotation angle resolution of the external machine, that is, the external machine cannot distinguish the minimum angle of the rotation of the spindle connected with the tool. If the rotation is less than 12 times, the processing cycle of the external machine station becomes large, and the processing efficiency is reduced. It is understood that in other types of machines, other numbers of rotations may be set.

After preservation, the cutter is used for processing production.

After the new cutter setting flow is completed, the cutter is used for processing, and after the cutter is used for processing and producing for a certain period of time, the cutter is rechecked, which comprises the following steps:

the step of enabling the cutter to touch the tool checking instrument in the Z direction is carried out again every first preset time so as to calculate the length of the cutter again;

judging whether the recalculated cutter length exceeds the range of the predetermined cutter standard length, wherein the cutter length is determined to be triggered to be abnormal and an alarm is given whenever the calculated cutter length exceeds the range of the predetermined cutter standard length; and determining that the tool length is normal whenever the calculated tool length does not exceed the range of the predetermined tool standard length.

Further, if the length of the cutter is determined to be abnormal, the cutter is reinstalled, and the cutter is detected in the initial step of cutter setting by the new cutter; if the length of the cutter is determined to be normal, the cutter is continuously rechecked and set, and the method further comprises the following steps:

the step of enabling the cutter to touch the tool checking instrument in the single direction is carried out again every second preset time so as to calculate the diameter of the cutter again;

Further, if the cutter is determined to be excessively worn, the cutter is reinstalled and the cutter is detected in the initial step of cutter setting by the new cutter; if the tool wear is determined to be in the normal wear range, the tool setting is rechecked (the tool wear amount can be compensated by a proper machining compensation amount before rechecking the tool setting), and the method further comprises the following steps:

performing the step of enabling the cutter to touch the cutter detector in the single direction again every third preset time so as to calculate the deflection value of the cutter again;

Further, if the tool deflection out-of-tolerance is determined, the tool is reinstalled and the tool is detected in the initial step of tool setting by the new tool; if the tool deflection is determined to be normal, the tool is rechecked and the tool setting is continued, and the method further comprises the following steps:

detecting the blade angle and the blade value again every fourth preset time;

in the detection process, the blade values and the respective blade angles of a plurality of blades of the cutter can be respectively measured through the minimum bisection method, the blade values are compared with the standard blade values recorded in the cutter setting process of a new cutter, whether the difference values of the blade angles and the blade values which are detected again and the stored blade angles and the blade values exceed a predetermined cutter breakage range or not is judged, and when the difference values exceed the predetermined cutter breakage range, cutter breakage is determined and an alarm is given; and when the difference value does not exceed the preset tool breakage range, the tool is used for continuing the machining production.

The cutter checking method comprises the steps of using a cutter checking instrument which has the capability of detecting cutters in multiple directions as before, relying on the sensitivity of the cutter checking instrument in the multiple directions, sensing the touch of the cutters in different directions, further obtaining cutter length, cutter diameter, deflection value, wear degree, tipping degree and other cutter parameters of the cutters, realizing detection of the cutters after new cutter installation and in a machining process, and meanwhile, assisting a machine table to timely replace the cutters which do not meet machining requirements or realize automatic machining compensation of the cutters in the machining process, and effectively improving machining quality and machining efficiency.

Hereinbefore, specific embodiments of the present application are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the application. Such modifications and substitutions are intended to be within the scope of the present application.

Claims

1. A knife detector is used for generating a knife detection signal when being touched by a knife so as to enable an external machine to calculate the position of the knife according to the knife detection signal, and is characterized by comprising:

2. The knife detector of claim 1, wherein the trigger assembly comprises:

3. A knife detector according to claim 2 wherein the trigger member has a trigger portion and a support portion integrally formed with or removably fixedly connected to the trigger portion, the trigger portion being connected to the connector via the support portion, the trigger portion being coaxial with the connector or having axes perpendicular to each other, the trigger portion having a diameter greater than the diameter of the support portion.

4. The knife detector of claim 1, wherein the detection assembly further comprises a tripod, a ball mount, and a power circuit, the tripod comprises an insulating body fixedly connected with the trigger component and three legs which are conductive and electrically isolated from each other, the ball frame comprises an insulation accommodating part for accommodating the tripod and allowing the tripod to move and six conductive balls arranged around the insulation accommodating part, the power circuit and the three legs and the six conductive balls form the sensing circuit, when the trigger assembly is touched by the cutter in the X, Y or Z direction, the conductive balls corresponding to the corresponding support legs are triggered to separate, so that the sensing circuit is changed into an open circuit state from a closed circuit state, and the sensing circuit generates the cutter detection signal.

5. The knife detector of claim 4, wherein the six conductive balls are divided into two groups each of a first conductive ball group having a first conductive ball and a sixth conductive ball, a second conductive ball group having a second conductive ball and a fourth conductive ball, and a third conductive ball group having a third conductive ball and a fifth conductive ball, the six conductive balls being spaced apart from each other, the two conductive balls of each group being in separable electrical contact with one of the legs disposed between the two conductive balls, the fourth conductive ball of the second conductive ball group being electrically connected to the third conductive ball of the adjacent third conductive ball group adjacent to the fourth conductive ball, respectively, to the positive electrode and the negative electrode of the power circuit, the sixth conductive ball of the first conductive ball group being electrically connected to the fifth conductive ball of the adjacent third conductive ball group, the second conductive balls in the second conductive ball group are electrically connected with the adjacent first conductive balls in the first conductive ball group.

6. A tool detector according to claim 5 wherein the tripod is drivingly connected to the trigger assembly, movement of the tripod occurring in response to the trigger assembly being touched by the tool causing at least one leg of the tripod to separate from the electrically conductive ball in electrical contact with the leg causing the sensing circuit to change from the on state to the off state.

7. The tool detector of claim 5, wherein three of said legs are disposed on said insulating body, three of said legs are spaced apart, and two of said conductive balls that are in separable contact with one of said legs are disposed on opposite sides of said one of said legs.

8. A knife detector according to claim 1 further comprising a blow cradle connected to the housing, the blow cradle including a nozzle for emitting gas, the nozzle being disposed towards the trigger assembly for emitting gas towards the trigger assembly before each contact by the knife to clean the surface of the trigger assembly to be contacted by the knife.

9. A method of testing a tool using the tool tester of any one of claims 1 to 8 in mutually perpendicular X, Y or Z directions, wherein the Z direction is a vertical direction and the X, Y direction is two mutually perpendicular directions in a horizontal plane perpendicular to the Z direction, the method comprising:

replacing a cutter;

10. The method of claim 9, wherein after determining that the tool has not been swapped, the method further comprises:

11. The method of claim 10, wherein after determining that the tool runout is normal, the method further comprises:

and after preservation, the cutter is used for processing production.

12. The method of claim 11, wherein after a certain period of machining production using the tool, the method further comprises:

13. The method of claim 11 or 12, wherein the method further comprises:

14. The method of claim 11 or 12, wherein the method further comprises:

15. The method of claim 11 or 12, wherein the method further comprises:

detecting the blade angle and the blade value again every fourth preset time;