TW201905427A - Clamping force measuring device including a device body, pressure receiving members, deformation slits, a first extended slit, a second extended slit, a reserved slit, a groove, and a strain gauge - Google Patents

Abstract

A clamping force measuring device comprises: a device body, a plurality of pressure receiving members, a pair of deformation slits, a first extended slit, a second extended slit, a reserved slit, at least one groove, and a plurality a strain gauges and a processing unit and a wireless transmission unit disposed on a circuit board. Each of the deformation slits provides a small space for movement of the device body when the pressure receiving members are respectively clamped by the clamping force applied by a plurality of jaws. According to the voltage change caused by the deformation of each strain gauge, the applied clamping force can be measured. The processing unit is configured to convert the measured result into a digital signal which is transmitted through the wireless transmission unit to a smart device of a user for reading. The user can perform mechanical calibration, error correction, and cloud monitoring according to the measured clamping force values.

Description

 Clamping force measuring device  

The invention relates to a measuring device, in particular to a clamping force measuring device, which clamps the device body to measure the clamping force of the chuck and transmits the value to the smart device through wireless transmission. efficacy.

The lathe is the most important equipment in machining. It clamps the workpiece through the chuck and performs high-speed operation. Finally, the workpiece is cut by the turning tool to complete the machining. Among them, the chuck plays an important role in the processing process. If the clamping force of the chuck is insufficient, the workpiece cannot be clamped stably, which will affect the efficiency and quality of the cutting. In addition, the speed of the chuck is zero after the workpiece is clamped. When accelerating to the working speed, the clamping force is reduced due to the centrifugal force generated by the jaws during rotation, which may result in the workpiece not being able to be loosened loosely, or the machining efficiency and quality may be degraded due to the reduction of the clamping force. In summary, the clamping force of the chuck is a very important measurement item in the lathe. Since the measurement of the clamping force has to be performed in the high-speed rotation of the lathe, it is technically more difficult.

Therefore, in view of the above-mentioned problems, how to develop an innovative structure with more ideal and practicality is really eagerly awaited by consumers, and it is also the goal and direction of relevant industry players to make efforts to develop breakthroughs.

The invention discloses a clamping force measuring device, comprising: a device body, a peripheral recessed plurality of recessed grooves, wherein one of the inserting grooves is arranged in the Z-axis direction in the upward direction of the device body, and the X-axis, the Y-axis and the Z-axis The bearing shafts are respectively arranged on the linear axes orthogonal to each other in the three-dimensional coordinate system, and each of the clamping grooves is respectively provided with a pressure receiving member, and the two sides of the device body respectively form an end surface toward the Y axis, and each of the end faces is arranged in a pair of deformations. a slit and a reserved slit, wherein each of the deformed slits is formed by a slit extending through a transverse slit, and a free end of each of the straight slits extends along a circumference of the apparatus body to extend a first extending slit. The first extending slits are symmetrically disposed on both sides of the Z-axis, and the free ends of the transverse slits extend upwardly toward the Z-axis to form a second extending slit, and each of the second extending slits is parallel to the straight slit a slit, each of the straight slits extending toward the Z-axis in the same direction without extending beyond the circumference of the apparatus body and symmetrically disposed on both sides of the Z-axis, each of the horizontal slits extending toward the X-axis without extending beyond the circumference of the apparatus body and symmetrically disposed On both sides of the Z axis, the horizontal slit is parallel to the reserved slit, and the end face is interposed Between the deformation slit and the reserved slit, at least one groove is disposed, the groove is internally provided with a strain gauge; a circuit board is disposed on the end surface, the circuit board and each of the strain gauge and a battery Electrically connected, and the circuit board is provided with a processing unit capable of processing and converting each of the strain gauges, and a wireless transmission unit capable of transmitting the converted message to a smart device.

In the above, there are two such slots, and each of the slots is respectively disposed at upper and lower ends of the apparatus body along the Z-axis, and each of the slots is arranged in a parallel manner of 180°.

In the above, there are three such slots, and the two slots are symmetrically disposed on the two sides of the apparatus body along the Z-axis, and each of the slots is 120° and spaced apart from each other by the circumference of the apparatus body.

In the above, the grooves have a total of four, and the two pairs are symmetrically disposed in pairs on both sides of the end faces along the Z-axis.

According to the above structure, each of the pressure receiving members provides a plurality of jaw clamping of the lathe chuck, and each of the deformation slits provides a fretting displacement space when the jaws apply a force, so that each strain gauge senses the strain. And sensing the clamping force of the clamping jaws by changing the voltage of the strain gauges, and converting the signals through the processing unit, and transmitting the information to the smart device via the wireless transmission unit for use. It is convenient to read the clamping force, and can perform mechanical correction, debugging and cloud monitoring according to the clamping force measurement value; furthermore, the reserved gap can provide deformation space when the device body is under pressure; The transmission unit is not limited by the line, so the sensed signal can be transmitted to the smart device at any time.

As an improvement of the present invention, an adjustment resistor is disposed inside the groove, and the adjustment resistor is electrically connected to the strain gauge, and the strain gauge is composed of a plurality of sensing resistors. When such a structure is employed, the adjustment resistor can be manually adjusted to reduce the strain gauge error rate.

As another improvement of the present invention, the slits at both ends of the reserved slit are symmetrical and larger than the slit of the middle portion. When such a structure is adopted, the middle slit of the reserved slit is small, which can provide protection when the apparatus body is overloaded.

As an improvement of the present invention, at least one light emitting unit and a display unit are disposed on the circuit board. When the structure is used, when the device body is charged, the light-emitting unit will light up to display that the device body is currently charging, and when the charging is completed, the light-emitting unit is turned off to indicate that the charging is completed, so that the user can identify the charging state. The display unit can provide an operation display when it is static, which is convenient for parameter setting and correction display.

As a further improvement of the present invention, a side of the device body is covered with a limiting seat, and the limiting seat is recessed with a receiving groove for receiving the battery and the circuit board. When the structure is adopted, the limiting seat can limit the displacement of the circuit board. Since the clamping jaws rotate at a high speed when the clamping jaw is actuated, the limiting seat can prevent the circuit board from being randomly displaced or back and forth on the side of the device body. Collision, reducing its wear and tear.

As another improvement of the present invention, a front cover and a back cover are respectively disposed on two sides of the device body, and the front cover is adjacent to the circuit board and a charging socket is formed on the front cover surface. When the structure is adopted, the front cover and the back cover not only have the functions of protecting and restricting various components inside the body of the device, but also prevent dust from falling into the interior of the device body, and the charging socket can also provide The charging function of the device body.

As an improvement of the present invention, the pressure receiving member surface is provided with a slip-stop structure. When such a structure is employed, the friction coefficient of each of the pressure receiving members can be increased, and the clamping of each of the jaws can be stabilized.

As an improvement of the present invention, a positioning member is disposed at one end of the pressure receiving member, and each of the clamping grooves is provided with a positioning hole, and the positioning member is matched with the positioning hole. When such a structure is employed, the pressure receiving member can be replaced with a total length, for example, the pressure member having a shorter overall length is replaced with the pressure member having a longer total length.

The above described objects, structures, and features of the present invention will be apparent from the following description of the preferred embodiments of the invention.

10‧‧‧ device body

11‧‧‧ end face

12‧‧‧Inlay

121‧‧‧Positioning holes

14‧‧‧ Pressure parts

141‧‧‧ positioning parts

142‧‧‧Slip-stop structure

16‧‧‧ deformation slit

161‧‧‧ Straight slit

1611‧‧‧First extension slit

162‧‧‧ transverse slit

1621‧‧‧Second extension slit

17‧‧‧ Reserved gap

18‧‧‧ Groove

20‧‧‧Strain gauge

22‧‧‧Adjusting resistance

30‧‧‧ boards

321‧‧‧Battery

322‧‧‧Processing unit

324‧‧‧Wireless transmission unit

326‧‧‧Lighting unit

328‧‧‧Display unit

40‧‧‧Limited seat

42‧‧‧ accommodating slots

50‧‧‧ front cover

502‧‧‧Charging jack

52‧‧‧Back cover

60‧‧‧claw

62‧‧‧Smart device

64‧‧‧Software

1 is a perspective view of an embodiment of a device body of the present invention;

2 is a perspective exploded view of the present invention

Figure 3 is a schematic view of the clamping force of the measuring chuck of the present invention

4 is a schematic diagram of the deformation slit and the reserved slit after the device body of FIG. 3 is opened;

Figure 5 is a series diagram of the strain gauge and the adjustment resistor of the present invention.

FIG. 1 is a schematic view showing a first embodiment of the present invention. Three pressure-receiving members 14 are disposed on the periphery of a device body 10. The two sides of the device body 10 are respectively formed with an end surface 11 toward the Y-axis. 11 is a plurality of pairs of deformation slits 16 , the X axis, the Y axis and the Z axis are linear axes orthogonal to each other in the three-dimensional coordinate system, and each of the deformation slits 16 is symmetrically disposed on the device body One of the sides of the 10, and each of the deformation slits 16 is connected by a slit 161 and a transverse slit 162 to form an approximately L-shaped slit. The two sides of the apparatus body 10 are adjacent to the deformation slits 16 respectively. A groove 18 is recessed, and a strain gauge 20 is disposed on an inner surface of each of the grooves 18, and an adjustment resistor 22 is disposed on an inner side of the groove 18, and each of the grooves 18 is correspondingly deformed. The other end of the slit 16 is provided with a reserved slit 17, which is parallel with each of the horizontal slits 162, and the slits at both ends of the reserved slit 17 are symmetric and larger than the slit of the middle portion, thereby The reserved slot 17 can provide protection when the device body 10 is overloaded.

FIG. 2 is an exploded perspective view showing a first embodiment of the present invention combined with a front cover 50 and a back cover 52. The device body 10 is recessed with three recessed slots 12, and one of the recessed slots 12 is facing the device body 10. The upper direction is set in the Z-axis direction, and the Z-axis and the X-axis and the Y-axis are perpendicular to each other, and the other two of the slots 12 are symmetrically disposed on the two sides of the apparatus body 10 along the Z-axis, and each of the slots 12 is 120. And the spacing of the circumference of the device body 10 is equal to each other, and a positioning hole 121 is formed in the center of each of the cavities 12 for matching a positioning member 141 extending from the center of the pressure receiving member 14, each of the pressure receiving members The surface of the 14 is covered with a slip structure 142 for increasing frictional resistance. The two sides of the device body 10 are respectively recessed with two recesses 18, and the adjacent recesses 18 are in communication with each other. The strain gauges 20 are respectively disposed on the inner surfaces of the recesses 18, and one of the recesses 18 is disposed. The adjustment resistor 22 is provided at the inner edge. The deformation slits 16 are respectively formed in the top of each of the grooves 18, and the deformation slits 16 are formed by combining the straight slits 161 and the transverse slits 162, and the straight slits 161 are oriented in the same direction toward the Z axis. The device does not extend beyond the circumference of the device body 10 and is symmetrically disposed on both sides of the Z-axis. Each of the lateral slits 162 extends toward the X-axis and does not extend beyond the circumference of the device body 10 and is symmetrically disposed on both sides of the Z-axis. Each of the deformation slits 16 is disposed symmetrically on the end surface 11 and located below one of the recesses 12; the reserved slit 17 is disposed adjacent to the bottom of each of the recesses 18, and the reserved slit 17 is The lateral slits 162 are disposed in parallel with each other. A circuit board 30 and a battery 321 are further disposed on a side of the device body 10. The circuit board 30 is electrically connected to each of the strain gauge 20, the adjusting resistor 22 and the battery 321, and a processing switch is disposed on the circuit board 30. The processing unit 322 of each strain gauge 20 can transmit the converted message to the wireless transmission unit 324 of a smart device 62, a light emitting unit 326 capable of displaying light, and a display unit capable of displaying the clamping force value. 328. The front cover 50 and the back cover 52 are respectively disposed on the outermost edges of the device body 10. The front cover 50 defines a charging socket 502, and the front cover 50 is disposed adjacent to the side of the circuit board 30.

In the above, when the device body 10 is coupled to a limiting seat 40, the limiting seat 40 is disposed on the side of the device body 10. The receiving seat 40 is recessed on the side of the limiting seat 40. The circuit board 30 and the battery 321 are accommodated and limited, and then the front cover 50 is placed on the surface of the limiting seat 40.

In the above, the battery 321 can be charged by inserting a power source into the charging jack 502. When the light emitting unit 326 located on the circuit board 30 is lit, it indicates that the device body 10 is being charged, and the charging is completed after the charging is completed. It is convenient for the user to recognize the state of charge of the device body 10.

2, the free end of each of the straight slits 161 extends along a circumference of the apparatus body 10 to extend a first extending slit 1611, and each of the first extending slits 1611 is symmetrically disposed on both sides of the Z-axis. The free ends of the lateral slits 162 extend upwardly toward the Z-axis to form a second extending slit 1621, and each of the second extending slits 1621 is parallel to the straight slit 161.

Referring to FIG. 3 and FIG. 2, it is disclosed that the three clamping jaws 60 grip the pressure receiving members 14 and apply force. Since the pressure receiving members 14 have the anti-slip structure 142, each of the clamping jaws 60 can be added. The frictional resistance of the grip causes each of the jaws 60 to grip the device body 10 more stably. When each of the jaws 60 is biased, since each of the jaws 60 is equally biased, and each of the pressure receiving members 14 is disposed at an equidistant distance, only one of the pressing members 14 is required to be subjected to the biasing force. The information is converted by the processing unit 322 disposed on the circuit board 30, and the actual application force of each of the clamping jaws 60 is obtained by multiplying the deformation amount of each strain gauge 20 by the parameter adjustment of the adjusting resistor 22. The size is then transmitted by the wireless transmission unit 324 to the corresponding software 64 disposed in the smart device 62 for reading by the user; in addition, the display unit 328 can provide an operation display during static operation, which is convenient for parameters. Settings and correction display.

Referring to FIG. 3 to FIG. 5, it is disclosed that when the jaws 60 are biased, each of the deformation slits 16 and the reserved slits 17 on the apparatus body 10 are deformed by force. When the jaws 60 are biased to the corresponding pressure receiving members 14, each of the pressure receiving members 14 is subjected to a biasing force toward the center of the apparatus body 10, and each of the deformation slits 16 is biased toward the device. The center of the body 10 moves. Similarly, the reserved slit 17 is forced to move toward the center of the device body 10. The slight displacement generated by the deformation slit 16 and the reserved slit 17 causes deformation of each strain gauge 20 The voltage change current through each of the strain gauges 20 is changed, and the voltage change current is also changed. Since the strain gauges 20 are electrically connected to the circuit board 30, the processing unit 322 located on the circuit board 30 can be The change of the voltage and current of the strain gauge 20 is calculated and analyzed and converted into a clamping force, and the information is transmitted to the inside of the smart device 62 through the wireless transmission unit 324. The smart device 62 is internally provided with the corresponding software 64. The above signal can be presented on the screen of the smart device 62. For example, as shown in FIG. 3, the soft body 64 inside the smart device 62 shows that the clamping force of the jaw 60 is 11.34 kN.

It is to be noted that the above-described embodiments are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the scope of the invention. Modifications and variations of the embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as described in the appended claims.

Claims (9)

 A clamping force measuring device comprises: a device body, wherein a plurality of recesses are recessed in the periphery, wherein one of the slots is disposed in the Z-axis direction in the upward direction of the device body, and the X-axis, the Y-axis and the Z-axis are respectively a linear axis orthogonal to each other in the three-dimensional coordinate system, each of which is provided with a pressure receiving member, and two sides of the device body respectively form an end surface toward the Y axis, and each of the end surfaces is provided with a pair of deformation slits and a pre- a gap is formed, each of the deformation slits is formed by a slit extending through a horizontal slit, and a free end of each of the straight slits extends along a circumference of the apparatus body to extend a first extending slit, each of the first extending slits The slits are symmetrically disposed on both sides of the Z-axis, and the free ends of the transverse slits extend upwardly toward the Z-axis to form a second extending slit, and each of the second extending slits is parallel to the straight slit. The straight slits extend toward the Z axis in the same direction and do not extend beyond the circumference of the device body and are symmetrically disposed on both sides of the Z axis. Each of the horizontal slits extends toward the X axis and does not extend beyond the circumference of the device body and is symmetrically disposed on the Z axis. a lateral slit parallel to the reserved slit, each of the end faces being interposed between the deformation slits Between the reserved gaps, at least one groove is disposed, and a strain gauge is disposed inside the groove; a circuit board is disposed on one of the end faces, and the circuit board is electrically connected to each of the strain gauges and a battery, and The circuit board is provided with a processing unit capable of processing and converting each of the strain gauges, and a wireless transmission unit capable of transmitting the converted message to a smart device.    The clamping force measuring device according to claim 1, wherein the plurality of engaging grooves are respectively disposed at the upper and lower ends of the device body along the Z-axis, and each of the embedded grooves is 180° parallel setting.    The clamping force measuring device according to claim 1, wherein the plurality of slots are three, and the two slots are symmetrically disposed on the two sides of the device body along the Z axis, and each of the slots is 120°. And the arcs of the circumference of the device body are equal to each other.    The clamping force measuring device of claim 1, wherein an adjusting resistor is disposed inside the groove, and the adjusting resistor is electrically connected to the strain gauge, and the strain gauge is composed of a plurality of sensing resistors.    The clamping force measuring device according to claim 1 or 4, wherein the grooves have a total of four, and the two pairs are symmetrically disposed in pairs on both sides of the end faces along the Z-axis.    The clamping force measuring device according to claim 1, wherein the slits at both ends of the reserved slit are symmetric and larger than the slit of the middle portion.    The clamping force measuring device of claim 1, wherein a side of the device body is covered with a limiting seat, and the limiting seat is recessed with a receiving groove for receiving the Battery and the board.    The clamping force measuring device according to claim 1, wherein the pressure receiving member surface is provided with a slip-stop structure.    The clamping force measuring device according to the first or the eighth aspect of the invention, wherein a positioning member is disposed at one end of the pressure receiving member, and a positioning hole is disposed on each of the fitting grooves, and the positioning member is coupled to the positioning hole. Match the combination.