High-reliability conductivity online detection machine tool clamp, signal processing system and application

Abstract

The invention provides a high-reliability conductivity online detection machine tool clamp which comprises a clamp body and a positioning reference pad and further comprises a conductivity detection system, the conductivity detection system comprises a wireless signal transmitter, a conductive contact, a conductive terminal and a detection contact, and the wireless signal transmitter and the conductive contact are electrically connected and both arranged in the clamp body. The conductive terminal and the detection contact are electrically connected and are both arranged in the positioning reference pad, and the conductive contact is conductively connected with the conductive terminal. The invention further provides a signal processing system used in cooperation with the high-reliability conductivity online detection machine tool clamp and application of the high-reliability conductivity online detection machine tool clamp. According to the invention, the equipment cost is reduced, and the accuracy and real-time performance of detection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of finishing design of machine tool parts, and in particular to an online detection machine tool fixture, a signal processing system and applications. Background Art

[0002] To meet customer needs and mechanical performance requirements, the technical requirements for superhard CNC grinding wheels, semiconductor grinding wheels, and high-position precision mechanical parts are constantly improving, with positional accuracy requirements exceeding 0.01mm. This poses a greater challenge, especially for parts guaranteed by lathe machining processes. In previous production, position correction and fixture positioning were used to ensure accuracy. However, since general fixtures lack online detection, there may be a misalignment between the workpiece positioning reference and the fixture positioning surface after positioning, resulting in reduced positioning accuracy and out-of-tolerance results.

[0003] Currently, all major fixture manufacturers are researching online detection measures, and the mainstream method is airtightness detection. This detection method uses an air source, air path, fixture cavity, and workpiece to form a closed air path. Pressurized air is injected into the closed air path. The airtightness detection device detects the pressure in the air path and compares it with the set pressure. When the pressure is less than the set value, it indicates that the workpiece and fixture are not in contact, and an alarm is triggered to realize the online detection function. However, this detection method requires many accessories, such as a stable air source, airtightness detection device, air path pipeline, gas filter device, and valve components, and the composition is complex. At the same time, the air path must be designed on the fixture. To ensure the airtightness of the air path, sealing components must be designed at the connection points and moving parts, which is costly. In addition, the air path of this detection method usually penetrates from the rear end of the machine tool spindle and connects to the fixture through the spindle. The transmission distance is long, the risk of gas leakage is high, and the pressure loss during transmission causes the detection to be unreliable. In addition, the detection of system faults is also difficult.

[0004] For example, the invention patent with publication number CN109968078A discloses a high-reliability, low-cost airtight clamp and its use method, comprising a tightening screw, a nut, a spring chuck seat, a spring chuck, a transition plate, a positioning cylinder, and a pull rod. The spring chuck seat is connected to the spring chuck at one end and to the nut at the other end. The pull rod passes through the spring chuck and is connected to the nut via the tightening screw. The spring chuck seat is provided with the transition plate on the side near the spring chuck. The positioning cylinder is provided on the transition plate. The transition plate is provided with at least one vent hole, a vent pipe, and an air outlet hole in the radial direction. The vent hole is externally connected to a gas detection device. This invention solves the problems of air path blockage and high cost in the prior art by inserting an air pipe into the outer surface of the airtight clamp and utilizing a gas detection device, thereby achieving a high-reliability, low-cost airtight clamp, simplifying air path disassembly and detection, and improving workpiece clamping efficiency. However, it cannot realize real-time monitoring function and cannot check the position status of the workpiece during processing, thus having detection loopholes. Summary of the Invention

[0005] In response to the technical problems of high equipment cost, inaccurate test results and inability to monitor in real time in existing machine tool fixtures passing airtightness testing, the present invention proposes a high-reliability conductivity online detection machine tool fixture, signal processing system and application. A switch quantity is formed by the workpiece and two detection contacts. Whether a closure is formed or not determines whether a wireless signal transmitter transmits a power-on signal. The wireless signal receiving processor processes the signal transmitted by the wireless signal transmitter and sends an alarm signal to the machine tool when a non-set value occurs, thereby reducing equipment cost and improving the accuracy and real-time performance of detection.

[0006] In order to achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A high-reliability conductivity online detection machine tool fixture includes a fixedly connected fixture body and a positioning reference pad, and also includes a conductivity detection system. The conductivity detection system includes a wireless signal transmitter, a conductive contact, a conductive terminal and a detection contact. The wireless signal transmitter and the conductive contact are electrically connected and both are arranged in the fixture body, the conductive terminal and the detection contact are electrically connected and both are arranged in the positioning reference pad, and the conductive contact and the conductive terminal are connected.

[0008] Preferably, the side surface of the clamp body is provided with at least a first wireless signal transmitter mounting hole and a second wireless signal transmitter mounting hole, and the wireless signal transmitter includes at least a first wireless signal transmitter and a second wireless signal transmitter, the first wireless signal transmitter is arranged in the first wireless signal transmitter mounting hole, and the second wireless signal transmitter is arranged in the second wireless signal transmitter mounting hole.

[0009] Preferably, the contact end surface between the clamp body and the positioning reference pad is provided with at least a first conductive contact mounting hole, a second conductive contact mounting hole, a third conductive contact mounting hole and a fourth conductive contact mounting hole; the conductive contacts include at least a first conductive contact, a second conductive contact, a third conductive contact and a fourth conductive contact, and the first conductive contact, the second conductive contact, the third conductive contact and the fourth conductive contact are respectively installed in the corresponding conductive contact mounting holes; the contact end surface between the clamp body and the positioning reference pad is provided with at least a wiring groove, the first conductive contact and the second conductive contact are connected to the first wireless signal transmitter wire through the wiring groove, and the third conductive contact and the fourth conductive contact are connected to the second wireless signal transmitter wire through the wiring groove.

[0010] Preferably, the positioning reference pad and the clamp body connection end are provided with at least a first conductive terminal mounting hole, a second conductive terminal mounting hole, a third conductive terminal mounting hole and a fourth conductive terminal mounting hole, and the conductive terminals include at least a first conductive terminal, a second conductive terminal, a third conductive terminal and a fourth conductive terminal; the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal are respectively installed in the corresponding conductive terminal mounting holes, and the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal are respectively in conductive contact with the first conductive contact, the second conductive contact, the third conductive contact and the fourth conductive contact in sequence.

[0011] Preferably, a first wire threading groove is provided at the bottom of the first conductive terminal mounting hole, a second wire threading groove is provided at the bottom of the second conductive terminal mounting hole, a third wire threading groove is provided at the bottom of the third conductive terminal mounting hole, and a fourth wire threading groove is provided at the bottom of the fourth conductive terminal mounting hole; the contact end surface of the positioning reference pad and the detection workpiece is provided with at least a first detection contact mounting hole, a second detection contact mounting hole, a third detection contact mounting hole and a fourth detection contact mounting hole; the detection contact includes at least a first detection contact, a second detection contact, a third detection contact and a fourth detection contact, and the first detection contact, the second detection contact, the third detection contact and the fourth detection contact are respectively installed in the corresponding detection contact mounting holes; the first detection contact is connected to the first conductive terminal wire through the first wire threading groove, the second detection contact is connected to the second conductive terminal wire through the second wire threading groove, the third detection contact is connected to the third conductive terminal wire through the third wire threading groove, and the fourth detection contact is connected to the fourth conductive terminal wire through the fourth wire threading groove.

[0012] Preferably, the wireless signal transmitter and the conductive contacts are evenly arranged at fixed angles along the circumferential direction with the central axis of the clamp body as the center of symmetry; the conductive terminals and the detection contacts are evenly arranged at fixed angles along the circumferential direction with the central axis of the positioning reference pad as the center of symmetry, the positions and quantities of the conductive contacts and the conductive terminals correspond one to one, and the number of the detection contact mounting holes corresponds to the conductive terminal mounting holes.

[0013] Preferably, the first wireless signal transmitter, the first conductive contact, the first conductive terminal, the first detection contact, the detection workpiece, the second detection contact, the second conductive terminal and the second conductive contact form a first detection circuit;

[0014] The second wireless signal transmitter, the third conductive contact, the third conductive terminal, the third detection contact, the detection workpiece, the fourth detection contact, the fourth conductive terminal and the fourth conductive contact form a second detection loop;

[0015] If the workpiece is non-conductive material, the detection contact adopts a macro induction switch; if the workpiece is conductive material, the detection contact adopts a conductor.

[0016] Preferably, the wireless signal transmitter and the conductive contact housing are preferably made of ABS plastic; the conductive terminal and the detection contact housing are preferably made of bakelite; and the conductive contact is preferably an elastic pressure contact.

[0017] Preferably, a signal processing system includes a machine tool system and a wireless signal receiving processor, the machine tool system is connected to the device start trigger interface of the wireless signal receiving processor through an output interface, which is used to control the start of the wireless signal receiving processor, the wireless signal receiving processor has a built-in wireless signal receiver and a signal processor connected thereto, the wireless signal receiver is wirelessly connected to the wireless signal transmitter, and the signal processor is connected to the machine tool system alarm input interface through an alarm output interface; after the wireless signal receiving processor is started according to the detection signal of the machine tool system, the wireless signal receiver receives the transmission signal of the wireless signal transmitter of the conductivity detection system and sends a logic level signal to the signal processor, and the signal processor makes an alarm judgment based on the logic level signal.

[0018] Preferably, an application of a high-reliability conductivity online detection machine tool fixture is characterized in that the clamp body fixes the detection workpiece through the clamping claws and fits the end face of the detection workpiece with the end face of the positioning reference pad. After the machine tool system reads the detection instruction, it sends a detection signal to the wireless signal receiving processor, and the wireless signal receiving processor starts to receive the signal sent by the conductivity detection system; when the conductivity detection system forms a loop with the detection workpiece, it sends a conduction signal to the wireless signal receiving processor, otherwise, no signal is sent; when the wireless signal receiving processor does not receive the conduction signal, it determines that the position state of the detection workpiece is abnormal, and the wireless signal receiving processor sends an alarm signal to the machine tool system through the signal processor. The beneficial effects of the present invention are:

[0019] The present invention has a simple structure and does not require peripheral devices such as an air pressure source, a sealing element, and a high-speed rotary joint for relative airtightness detection.

[0020] Wireless signal transmission technology is mature, components are cheap, and costs are low.

[0021] The electrical conduction sensitivity is high and the response speed is fast.

[0022] The detection process has fewer steps and high detection accuracy, which can avoid detection errors caused by air tightness detection gas line pressure loss, leakage, and seal aging. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is the front view of the clamp of the present invention.

[0025] Figure 2 This is a cross-sectional view of the clamp BB of the present invention.

[0026] Figure 3 This is a cross-sectional view of the clamp AA of the present invention.

[0027] Figure 4 Schematic diagram of the signal processing system structure of the present invention.

[0028] Figure 5 Schematic diagram of the detection principle of the present invention.

[0029] Figure 6 This is a schematic diagram of the bidirectional oblique axis positioning fixture structure and working principle.

[0030] Among them, 1-first wire; 4-second wire; 8-third wire; 10-fourth wire; 13-fifth wire; 16-sixth wire; 19-seventh wire; 20-eighth wire; 2-first wireless signal transmitter; 9-second wireless signal transmitter; 3-first detection contact; 5-second detection contact; 6-third detection contact; 7-fourth detection contact; 11-first elastic pressure contact; 14-second elastic pressure contact; 17-third elastic pressure contact; 22-fourth elastic pressure contact; 12-first conductive terminal; 15-second conductive terminal; 18-third conductive terminal; 21-fourth conductive terminal; 23-positioning reference pad; 24-clamping body; 25-detection workpiece; 26-clamping jaw; 27-first transmission rod; 28-second transmission rod; 29-transmission disk. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment is described using a bidirectional oblique axis positioning fixture as a fixture carrier, wherein the structure and working principle of the bidirectional oblique axis positioning fixture are as follows: Figure 6 As shown, under the action of the pulling force F of the first transmission rod 27, the transmission disc 29 moves to the left, generating a pulling force F1, which drives the second transmission rod 28 to move to the upper left, generating a pulling force F2, and at the same time, the clamping jaw 26 fastened thereto moves in the same direction, generating a radial force F4 and an axial force F3. These two forces can tighten the inspection workpiece and pull the inspection workpiece toward the contact end face of the positioning reference pad.

[0034] A high reliability conductivity online detection machine tool fixture, such as Figure 3 As shown, it includes a clamp body 24, a positioning reference pad 23 and a conductivity detection system. The clamp body 24 and the positioning reference pad 23 are preferably connected by bolts for easy replacement. The conductivity detection system includes a wireless signal transmitter (AG-C106 wireless signal transmitter in this embodiment), a conductive contact, a conductive terminal and a detection contact. The wireless signal transmitter and the conductive contact are electrically connected and both are arranged in the clamp body 24. The conductive terminal and the detection contact are electrically connected and both are arranged in the positioning reference pad 23. The conductive contact and the conductive terminal are conductively connected.

[0035] Specifically, such as Figure 2As shown, the side of the clamp body 24 is provided with a first wireless signal transmitter mounting hole and a second wireless signal transmitter mounting hole. The first wireless signal transmitter mounting hole and the second wireless signal transmitter mounting hole are evenly arranged at 180° along the outer circle of the clamp body 24 with the central axis of the clamp body 24 as the center of symmetry, that is, they are relatively arranged.

[0036] Furthermore, the wireless signal transmitter includes a first wireless signal transmitter 2 and a second wireless signal transmitter 9. The first wireless signal transmitter 2 and the second wireless signal transmitter 9 use different frequency bands and are powered by button batteries. In this embodiment, they are 315MHz and 433MHz respectively. The signal channels are physically isolated by two independent frequency bands to avoid cross interference, which is suitable for high-speed motion state signal transmission.

[0037] Furthermore, the first wireless signal transmitter 2 and the second wireless signal transmitter 9 both use ABS plastic as the shell material to achieve insulation and avoid signal shielding. The shell of the first wireless signal transmitter 2 is threadedly set in the first wireless signal transmitter mounting hole, and the shell of the second wireless signal transmitter 9 is threadedly set in the second wireless signal transmitter mounting hole.

[0038] Example 2

[0039] A high reliability conductivity online detection machine tool fixture, such as Figure 3 As shown, it includes a clamp body 24, a positioning reference pad 23 and a conductivity detection system. The conductivity detection system includes a wireless signal transmitter, a conductive contact, a conductive terminal and a detection contact. The wireless signal transmitter and the conductive contact are electrically connected and both are arranged in the clamp body 24. The conductive terminal and the detection contact are electrically connected and both are arranged in the positioning reference pad 23. The conductive contact and the conductive terminal are conductively connected.

[0040] Specifically, such as Figure 2 、 Figure 3 As shown, the contact end surface of the clamp body 24 and the reference pad is provided with a first conductive contact mounting hole, a second conductive contact mounting hole, a third conductive contact mounting hole and a fourth conductive contact mounting hole. The first conductive contact mounting hole, the second conductive contact mounting hole, the third conductive contact mounting hole and the fourth conductive contact mounting hole are symmetrically centered on the central axis of the clamp body 24 and are evenly arranged with a 90° hole spacing along the circumferential direction on the contact end surface of the clamp body 24 and the positioning reference pad 23.

[0041] Furthermore, the conductive contacts include a first conductive contact 11, a second conductive contact 14, a third conductive contact 17 and a fourth conductive contact 22. The first conductive contact 11, the second conductive contact 14, the third conductive contact 17 and the fourth conductive contact 22 all use ABS plastic as the shell material to achieve insulation and avoid signal shielding. The shell material of each conductive contact is installed in the corresponding conductive contact mounting hole by threading; the first conductive contact 11 and the second conductive contact 14 are used in pairs, and the third conductive contact 17 and the fourth conductive contact 22 are used in pairs, preferably used in pairs at 180° opposite angles.

[0042] Furthermore, the contact end surface of the clamp body 24 and the positioning reference pad 23 is provided with a wiring groove, such as Figure 1 As shown, with the central axis of the clamp body 24 as the center, a circular wiring groove is milled on the contact end surface of the clamp body 24 and the positioning reference pad 23. The cross section is semicircular and is used for wiring the first wire 1, the second wire 4, the third wire 8 and the fourth wire 10.

[0043] Furthermore, the first conductive contact 11 and the second conductive contact 14 are connected to the first wireless signal transmitter 9 through the fourth wire 10 and the third wire 8 respectively, and the third conductive contact 17 and the fourth conductive contact 22 are connected to the second wireless signal transmitter 2 through the first wire 1 and the second wire 4 respectively; after the connection, the wire terminals of the first wireless signal transmitter 9, the second wireless signal transmitter 2, the first conductive contact 11, the second conductive contact 14, the third conductive contact 17 and the fourth conductive contact 22 are respectively sealed with insulating glue, and the wiring groove is filled with insulating glue to prevent the wires from moving during the movement of the fixture, causing wire leakage or short circuit.

[0044] Furthermore, the first conductive contact 11 , the second conductive contact 14 , the third conductive contact 17 and the fourth conductive contact 22 are all elastic pressure contacts, which ensure the reliability of the electrical connection and avoid poor electrical signal contact that may cause detection errors.

[0045] The other structures are the same as those in Example 1.

[0046] Example 3

[0047] A high reliability conductivity online detection machine tool fixture, such as Figure 3 As shown, it includes a clamp body 24, a positioning reference pad 23 and a conductivity detection system. The conductivity detection system includes a wireless signal transmitter, a conductive contact, a conductive terminal and a detection contact. The wireless signal transmitter and the conductive contact are electrically connected and both are arranged in the clamp body 24. The conductive terminal and the detection contact are electrically connected and both are arranged in the positioning reference pad 23. The conductive contact and the conductive terminal are conductively connected.

[0048] Specifically, the positioning reference pad 23 is designed to be replaceable for positioning workpieces of varying diameters. The connection between the positioning reference pad 23 and the clamp body 24 is provided with a first conductive terminal mounting hole, a second conductive terminal mounting hole, a third conductive terminal mounting hole, and a fourth conductive terminal mounting hole. The first, second, third, and fourth conductive terminal mounting holes are evenly spaced 90° apart along the circumference of the positioning reference pad 23, with the central axis of the positioning reference pad 23 as the center of symmetry.

[0049] Furthermore, the first conductive terminal mounting hole, the second conductive terminal mounting hole, the third conductive terminal mounting hole and the fourth conductive terminal mounting hole respectively correspond to the positions of the first conductive contact mounting hole, the second conductive contact mounting hole, the third conductive contact mounting hole and the fourth conductive contact mounting hole.

[0050] Further, such as Figure 2 、 Figure 3 As shown, the conductive terminals include a first conductive terminal 12, a second conductive terminal 15, a third conductive terminal 18 and a fourth conductive terminal 21. The conductive material of the first conductive terminal 12, the second conductive terminal 15, the third conductive terminal 18 and the fourth conductive terminal 21 is preferably copper, and the first conductive terminal 12, the second conductive terminal 15, the third conductive terminal 18 and the fourth conductive terminal 21 all use bakelite material as the shell.

[0051] Furthermore, the outer diameter of each conductive terminal matches the diameter of the corresponding conductive terminal mounting hole, and the matching clearance is preferably 0.05mm-0.1mm. The outer shell of each conductive terminal is fixed in the corresponding conductive terminal mounting hole by gluing, and the first conductive terminal 12, the second conductive terminal 15, the third conductive terminal 18 and the fourth conductive terminal 21 are respectively in conductive contact with the first conductive contact 11, the second conductive contact 14, the third conductive contact 17 and the fourth conductive contact 22 in sequence.

[0052] The other structures are the same as those in Example 2.

[0053] Example 3

[0054] A high reliability conductivity online detection machine tool fixture, such as Figure 2 、 Figure 3 As shown, the bottom position of the first conductive terminal mounting hole is provided with a first wire threading groove, the bottom position of the second conductive terminal mounting hole is provided with a second wire threading groove, the bottom position of the third conductive terminal mounting hole is provided with a third wire threading groove and the bottom position of the fourth conductive terminal mounting hole is provided with a fourth wire threading groove. The first wire threading groove, the second wire threading groove, the third wire threading groove and the fourth wire threading groove are radially arranged along the positioning reference pad 23, and are respectively used for wiring the fifth wire 13, the sixth wire 16, the seventh wire 19 and the eighth wire 20.

[0055] Furthermore, the positioning reference pad 23 is provided with a first detection contact mounting hole, a second detection contact mounting hole, a third detection contact mounting hole and a fourth detection contact mounting hole on the contact end surface of the workpiece. The first detection contact mounting hole, the second detection contact mounting hole, the third detection contact mounting hole and the fourth detection contact mounting hole are evenly arranged with a 90° hole spacing in the circumferential direction on the contact end surface of the positioning reference pad 23 and the workpiece with the central axis of the positioning reference pad 23 as the center of symmetry.

[0056] Further, such as Figure 1 As shown, the detection contacts include a first detection contact 3, a second detection contact 5, a third detection contact 6, and a fourth detection contact 7. The first detection contact 3, the second detection contact 5, the third detection contact 6, and the fourth detection contact 7 all use bakelite as their outer shells. The outer diameter of each detection contact matches the corresponding detection contact mounting hole, and the matching clearance is preferably 0.05mm-0.1mm. Each detection contact shell is fixed to the corresponding detection contact mounting hole by gluing.

[0057] Furthermore, the first detection contact 3 is connected to the first conductive terminal 12 through a first wire threading groove, the second detection contact 5 is connected to the second conductive terminal 15 through a second wire threading groove, the third detection contact 6 is connected to the third conductive terminal 18 through a third wire threading groove, and the fourth detection contact 7 is connected to the fourth conductive terminal 21 through a fourth wire threading groove. Insulating glue is used to fill the first wire threading groove, the second wire threading groove, the third wire threading groove and the fourth wire threading groove.

[0058] When used for the first time, the end face of the positioning reference pad 23 is turned online to ensure that the four detection contacts and the end face of the positioning reference pad 23 are in the same plane. It is possible to detect that the workpiece is close to the end face of the reference pad 23 and also flattens the four detection contacts to achieve detection.

[0059] The other structures are the same as those in Example 3.

[0060] Example 4

[0061] A high-reliability conductivity online detection machine tool fixture, wherein the first wireless signal transmitter 2, the first conductive contact 11, the first conductive terminal 12, the first detection contact 3, the detection workpiece, the second detection contact 5, the second conductive terminal 15 and the second conductive contact 14 form a first detection circuit;

[0062] Furthermore, the second wireless signal transmitter 9, the third conductive contact 17, the third conductive end 18, the third detection contact 6, the detection workpiece, the fourth detection contact 7, the fourth conductive terminal 21 and the fourth conductive contact 22 form a second detection circuit.

[0063] Furthermore, the two detection contacts corresponding to any one of the transmitting circuits contact the detection workpiece at the same time. When the detection workpiece is in a normal position, a path is formed, so that the corresponding two wireless signal transmitter trigger terminals are turned on, and the corresponding wireless signal transmitter transmits a conduction signal.

[0064] Furthermore, when the detection workpiece is a non-conductive material, the first detection contact 3, the second detection contact 5, the third detection contact 6 and the fourth detection contact 7 all use macro sensing switches (STM11A-L high-sensitivity touch sensing switches are used in this embodiment); when the detection workpiece is a conductive material, the first detection contact 3, the second detection contact 5, the third detection contact 6 and the fourth detection contact 7 all use conductors, which are preferably copper in this embodiment.

[0065] The other structures are the same as those in Example 3.

[0066] Example 5

[0067] A signal processing system used in conjunction with the high-reliability conductivity online detection machine tool fixture, such as Figure 4 As shown, it includes a machine tool system and a wireless signal receiving processor (AG-C106 wireless signal receiving processor in this embodiment). The machine tool system is connected to the device start trigger interface of the wireless signal receiving processor through the output interface. The machine tool system supplies power to the wireless signal receiving processor and controls the on and off of the power supply by sending a detection signal to control the start of the wireless signal receiving processor; the wireless signal receiving processor has a built-in wireless signal receiver and a signal processor connected thereto. The wireless signal receiver is wirelessly connected to the wireless signal transmitter. The signal processor is connected to the alarm input interface of the machine tool system through the alarm output interface for alarm signal transmission.

[0068] Furthermore, the trigger signal is controlled by the machine tool M instruction (for example, the power supply of the wireless signal receiving processor is controlled on and off by the start instruction), and the wireless signal receiving processor controls the wireless signal receiver to receive the transmission signal of the wireless signal transmitter and sends a logic level signal to the signal processor, and the signal processor makes an alarm judgment based on the logic level signal. The shell of the wireless signal receiving processor is made of plastic and is sealed to prevent internal short circuits. The wireless signal receiving processor is preferably installed in the machine tool protective cover, at the upper end of the spindle box, as close as possible to the high-reliability conductivity online detection machine tool fixture of the present invention, and the installation position is as far away from the cutting fluid spray area as possible. The connection line between the wireless signal receiving processor and the machine tool alarm signal adopts an anti-interference signal line to avoid signal interference.

[0069] Furthermore, in this embodiment, the wireless signal receiving processor includes a first wireless signal receiver, a second wireless signal receiver and a signal processor, the first wireless signal receiver is used to receive the 315MHz frequency band signal sent by the first wireless signal transmitter 2, and the second wireless signal receiver is used to receive the 433MHz frequency band signal sent by the second wireless signal transmitter 9; if the first wireless signal receiver and the second wireless signal receiver receive a signal, they send a high-level signal "1" to the signal processor, otherwise they send a low-level signal "0" to the signal processor; if the signals received by the signal processor are all high-level signals "1", the workpiece position status is detected to be normal, otherwise, if one of the signals received by the signal processor is a low-level signal "0", the signal processor sends an alarm signal to the machine tool system.

[0070] Example 6

[0071] An application of high reliability conductivity online detection machine tool fixture, the detection principle diagram is as follows Figure 5 As shown, the clamping body 24 fixes the inspection workpiece through the clamping jaws 26 and fits the end face of the inspection workpiece with the end face of the positioning reference pad 23. The machine tool system reads the inspection instruction and sends a detection signal to the wireless signal receiving processor. The first wireless signal receiver and the second wireless signal receiver start to receive the transmission signals of the first wireless signal transmitter 2 and the second wireless signal transmitter 9 respectively.

[0072] Furthermore, the first detection circuit and the second detection circuit perform conductivity detection, the first wireless signal receiver and the second wireless signal receiver receive, the first wireless signal transmitter 2 sends a conduction signal or no signal to the first wireless signal receiver according to whether the first detection circuit is conductive, and the second wireless signal transmitter 9 sends a conduction signal or no signal to the second wireless signal receiver according to whether the second detection circuit is conductive.

[0073] Furthermore, the first wireless signal receiver and the second wireless signal receiver send a logic level signal to the signal processor according to whether a conduction signal is received. When the conduction occurs, the sent logic level signal is a high level signal "1", otherwise, the sent logic level signal is a low level signal "0". When the logic level signals received by the signal processor are all high level signals "1", the workpiece position status is detected to be normal. Otherwise, when the logic level signals received by the signal processor are not all high level signals "1", the workpiece position status is detected to be abnormal, and an alarm signal is sent to the machine tool system, and the machine tool system stops alarming, thereby realizing online detection of the workpiece.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-reliability conductivity online detection machine tool fixture, comprising a fixedly connected fixture body (24) and a positioning reference pad (23), characterized in that: It also includes a conductivity detection system, which includes a wireless signal transmitter, a conductive contact, a conductive terminal and a detection contact. The wireless signal transmitter and the conductive contact are electrically connected and both are arranged in the clamp body (24). The conductive terminal and the detection contact are electrically connected and both are arranged in the positioning reference pad (23). The conductive contact and the conductive terminal are connected.

2. The high-reliability online conductivity detection machine tool fixture according to claim 1, characterized in that: The side surface of the clamp body (24) is provided with at least a first wireless signal transmitter mounting hole and a second wireless signal transmitter mounting hole, and the wireless signal transmitter comprises at least a first wireless signal transmitter (2) and a second wireless signal transmitter (9), the first wireless signal transmitter (2) is arranged in the first wireless signal transmitter mounting hole, and the second wireless signal transmitter (9) is arranged in the second wireless signal transmitter mounting hole.

3. The high-reliability online conductivity detection machine tool fixture according to claim 2, characterized in that: The contact end surface between the clamp body (24) and the positioning reference pad (23) is provided with at least a first conductive contact mounting hole, a second conductive contact mounting hole, a third conductive contact mounting hole and a fourth conductive contact mounting hole; the conductive contacts include at least a first conductive contact (11), a second conductive contact (14), a third conductive contact (17) and a fourth conductive contact (22), and the first conductive contact (11), the second conductive contact (14), the third conductive contact (17) and the fourth conductive contact (22) are respectively installed in the corresponding conductive contact mounting holes; the contact end surface between the clamp body (24) and the positioning reference pad (23) is provided with at least a wiring groove, the first conductive contact (11) and the second conductive contact (14) are connected to the wire of the first wireless signal transmitter (9) through the wiring groove, and the third conductive contact (17) and the fourth conductive contact (22) are connected to the wire of the second wireless signal transmitter (2) through the wiring groove.

4. The high-reliability online conductivity detection machine tool fixture according to claim 3, characterized in that: The connection end between the positioning reference pad (23) and the clamp body (24) is provided with at least a first conductive terminal mounting hole, a second conductive terminal mounting hole, a third conductive terminal mounting hole and a fourth conductive terminal mounting hole, and the conductive terminals at least include a first conductive terminal (12), a second conductive terminal (15), a third conductive terminal (18) and a fourth conductive terminal (21); the first conductive terminal (12), the second conductive terminal (15), the third conductive terminal (18) and the fourth conductive terminal (21) are respectively installed in the corresponding conductive terminal mounting holes, and the first conductive terminal (12), the second conductive terminal (15), the third conductive terminal (18) and the fourth conductive terminal (21) are respectively in conductive contact with the first conductive contact (11), the second conductive contact (14), the third conductive contact (17) and the fourth conductive contact (22).

5. The high-reliability online conductivity detection machine tool fixture according to claim 4, characterized in that: The bottom position of the first conductive terminal mounting hole is provided with a first threading groove, the bottom position of the second conductive terminal mounting hole is provided with a second threading groove, the bottom position of the third conductive terminal mounting hole is provided with a third threading groove, and the bottom position of the fourth conductive terminal mounting hole is provided with a fourth threading groove; the contact end surface of the positioning reference pad (23) and the detection workpiece is provided with at least a first detection contact mounting hole, a second detection contact mounting hole, a third detection contact mounting hole and a fourth detection contact mounting hole; the detection contacts at least include a first detection contact (3), a second detection contact (5), a third detection contact (6) and the fourth detection contact (7), the first detection contact (3), the second detection contact (5), the third detection contact (6) and the fourth detection contact (7) are respectively installed in the corresponding detection contact installation holes; the first detection contact (3) is connected to the first conductive terminal (12) wire through the first threading groove, the second detection contact (5) is connected to the second conductive terminal (15) wire through the second threading groove, the third detection contact (6) is connected to the third conductive terminal (18) wire through the third threading groove, and the fourth detection contact (7) is connected to the fourth conductive terminal (21) wire through the fourth threading groove.

6. The high-reliability online conductivity detection machine tool fixture according to any one of claims 1 to 5, characterized in that: The wireless signal transmitter and the conductive contacts are evenly arranged at fixed angles along the circumferential direction with the central axis of the clamp body (24) as the center of symmetry; the conductive terminals and the detection contacts are evenly arranged at fixed angles along the circumferential direction with the central axis of the positioning reference pad (23) as the center of symmetry, the positions and numbers of the conductive contacts and the conductive terminals correspond one to one, and the number of the detection contact mounting holes corresponds to the number of the conductive terminal mounting holes.

7. The high-reliability online conductivity detection machine tool fixture according to claim 6, characterized in that: The first wireless signal transmitter (2), the first conductive contact (11), the first conductive terminal (12), the first detection contact (3), the detection workpiece, the second detection contact (5), the second conductive terminal (15) and the second conductive contact (14) form a first detection circuit; The second wireless signal transmitter (9), the third conductive contact (17), the third conductive terminal (18), the third detection contact (6), the detection workpiece, the fourth detection contact (7), the fourth conductive terminal (21) and the fourth conductive contact (22) form a second detection loop; If the workpiece is non-conductive material, the detection contact adopts a macro induction switch; if the workpiece is conductive material, the detection contact adopts a conductor.

8. The high-reliability online conductivity detection machine tool fixture according to any one of claims 1 to 5 or 7, characterized in that: The housings of the wireless signal transmitter and the conductive contact are preferably made of ABS plastic; the housings of the conductive terminal and the detection contact are preferably made of bakelite; and the conductive contact is preferably an elastic pressure contact.

9. A signal processing system, used in conjunction with the high-reliability online conductivity detection machine tool fixture according to any one of claims 1 to 8, characterized in that: It includes a machine tool system and a wireless signal receiving processor. The machine tool system is connected to the device start trigger interface of the wireless signal receiving processor through an output interface, which is used to control the start of the wireless signal receiving processor. The wireless signal receiving processor has a built-in wireless signal receiver and a signal processor connected thereto. The wireless signal receiver is wirelessly connected to the wireless signal transmitter. The signal processor is connected to the alarm input interface of the machine tool system through an alarm output interface. After the wireless signal receiving processor is started according to the detection signal of the machine tool system, the wireless signal receiver receives the transmission signal of the wireless signal transmitter of the conductivity detection system and sends a logic level signal to the signal processor. The signal processor makes an alarm judgment based on the logic level signal.

10. An application of a high-reliability conductivity online detection machine tool fixture, characterized in that: The clamping body (24) fixes the detection workpiece through the clamping claws (26) and fits the end face of the detection workpiece to the end face of the positioning reference pad (23). After the machine tool system reads the detection instruction, it sends a detection signal to the wireless signal receiving processor, and the wireless signal receiving processor starts to receive the signal sent by the conductivity detection system; when the conductivity detection system forms a loop with the detection workpiece, it sends a conduction signal to the wireless signal receiving processor, otherwise, it does not send a signal; when the wireless signal receiving processor does not receive the conduction signal, it determines that the position state of the detection workpiece is abnormal, and the wireless signal receiving processor sends an alarm signal to the machine tool system through the signal processor.

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