Detector for measuring number and damage of cutting edges of machine tool

Abstract

The utility model discloses a detector for measuring the number and damage of cutting edges of a machine tool in the technical field of lathe equipment, which comprises a detector main body, a sensor used for being connected with a cutter blade is arranged in the detector main body, and the sensor internally comprises six conducting rods, a circuit board, six conducting balls and three conducting rods. When two conductive balls are clamped into two sides of each conductive rod, each conductive ball is connected with the circuit board through a conductive rod to jointly form a group of normally closed conductive loops, and when the blade is stressed, the conductive rod in the stress direction of the sensor is separated from the conductive balls on two sides, and the normally closed conductive loops are disconnected to be in a normally open state; the circuit board is electrically connected with the main computer board, and a plurality of indicating lamps controlled by the main computer board are arranged on a shell of the detector main body; the device is simple and durable in structure, and has higher sensitivity for measuring the abrasion of the bottom of a common milling cutter of a machine tool.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe equipment, in particular to a detector for measuring the number and breakage of cutting edges of machine tool tools. Background Art

[0002] Ordinary one-way or five-way tool setters cannot measure the wear or chipping of machine tool tools. Laser tool setters with this function have complex structures and are very expensive. In addition, the protective conditions for using laser tool setters are also very high, and the highest quality air conditions are required. Otherwise, errors are likely to occur during use.

[0003] The disadvantage of the five-axis tool setter is that it can only measure tool length and tool diameter, because the output signal of the five-axis tool setter is only a level signal, which is emitted when the tool touches the blade. For the machine tool, there is only a distinction between touching and not touching. For example, when measuring a four-edge flat milling cutter, only the longest edge at the bottom and the edge with the largest side radius can be measured.

[0004] Laser tool setters are complex and require high levels of protection during use. Because they use a tool to block the laser signal, both the laser transmitter and receiver ports are protected by glass for waterproofing. This requires a constant supply of clean air to protect the glass from contamination by cutting fluids from the machine tool, which could affect laser transmission. The entire system utilizes non-contact measurement, resulting in complex circuitry and airflow, and high costs.

[0005] Based on this, the utility model designs a detector for measuring the number and breakage of machine tool cutting edges to solve the above problems. Utility Model Content

[0006] The purpose of the present utility model is to provide a detector for measuring the number and breakage of cutting edges of machine tool tools, so as to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A detector for measuring the number and breakage of cutting edges of machine tool tools, including a detector body, a sensor for connecting to a pair of blades is arranged inside the detector body, the sensor interior includes six conductive rods, a circuit board, six conductive balls and three conductive rods, when two conductive balls are stuck in the two sides of each conductive rod, each conductive ball is connected to the circuit board through a conductive rod to form a group of normally closed conductive circuits, and three groups of normally closed conductive circuits are formed in different directions inside, multiple conductive rods are installed together on a force-bearing pendulum column, and the force-bearing pendulum column is connected to the pair of blades, the sensor is provided with a spring for supporting the force-bearing pendulum column to swing and reset at the front end of the sensor, when the pair of blades is subjected to force, the conductive rods in the force direction of the sensor are separated from the conductive balls on both sides, the normally closed conductive circuit is disconnected and becomes normally open, the detector body is equipped with a main computer board, the circuit board is electrically connected to the main computer board, and the outer shell of the detector body is provided with multiple indicator lights controlled by the main computer board.

[0009] As a further solution of the present invention: a ball seat is provided on the outer end side of the sensor facing the counter blade, a plurality of ball grooves for clamping the conductive ball are provided on the inner circumference of the ball seat, an axial hole for the movable cooperation of the force-bearing pendulum column is provided in the center of the ball seat, a connector is fixedly installed on the outer end of the force-bearing pendulum column, and the connector provides a connecting frame for connection with the counter blade.

[0010] As a further solution of the present invention: the conductive rod is fixed to the side walls around the top of the ball seat, the ball seat is covered with a limiting inner cover, and the side walls of the limiting inner cover are axially provided with vertical grooves for slidingly limiting the conductive rod.

[0011] As a further solution of the present invention: multiple conductive rods are slidably inserted into the side wall of the limiting inner cover, the circuit board is fixedly arranged on the inner side of the limiting inner cover, the spring is fixed at the center position of the inner end face of the force-bearing pendulum column, and the inner end of the spring is clamped inside the limiting inner cover.

[0012] As a further solution of the present invention: a blow rod is provided on the side wall of the detector body, a trachea interface is provided on one side of the blow rod, the indicator light is provided on the outer side wall of the detector body, a cable is led outward from the end face of the detector body away from the pair of blades, and a corrugated tube is provided on the cable.

[0013] As a further solution of the present invention: the lower ends of the pair of blades are connected to the weak connection block through screw threads, and the weak connection block is connected to the sensor connector through a screw.

[0014] As a further solution of the present invention: the edges of the pair of blades are configured as beveled surfaces with an angle greater than forty-five degrees.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model has a simple structure, is easy to maintain and is durable.

[0017] 2. The utility model utilizes the fact that when the tool touches the counter-blade at a fixed rotation speed, a fixed-period pulse signal will appear. The single-chip microcomputer is used to identify this periodic pulse signal to determine the number of tool edges or whether the blade is worn. When the blade touches the counter-blade, the counter-blade pushes the rod structure inside to slide, separating it from the ball surface; forming an open circuit state. When there is no tool edge touching, the spring squeezes the conductive rod to fit the conductive ball to form a closed circuit, and wear and quantity detection is performed. The structure of the utility model has higher sensitivity for measuring the bottom wear of milling cutters commonly used in machine tools.

[0018] 3. When the machine tool makes an error, the broken blade will not be knocked away due to the effect of the flexible connecting piece, which makes it easy for the operator to replace the weak connection block and reuse it. It can protect the tool setting sensor and prevent the blade from being knocked away. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the detector body with the outer shell removed;

[0021] Figure 3 This is a schematic diagram of the structure of the sensor after removing the outer shell;

[0022] Figure 4 for Figure 3 Partial exploded view.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] Detector body 1, indicator light 10, blowing rod 11, air pipe interface 12, bellows 13, cable 14, connecting frame 15, blade 16, main computer board 17, sensor 2, ball seat 20, ball slot 21, conductive ball 22, force-bearing pendulum column 23, conductive rod 24, spring 25, conductive rod 26, limit inner cover 27, circuit board 28, connector 29. DETAILED DESCRIPTION Example 1

[0025] See also Figure 1-4A detector for measuring the number and breakage of machine tool blades includes a detector body 1, wherein a sensor 2 for connecting to a blade 16 is provided inside the detector body 1, wherein the sensor 2 includes six conductive rods 26, a circuit board 28, six conductive balls 22 and three conductive rods 24. When two conductive balls 22 are inserted into each conductive rod 24 on both sides, each conductive ball 22 is connected to the circuit board 28 through the conductive rod 26 to form a normally closed conductive circuit. Three normally closed conductive circuits are formed in different directions in the 2. Multiple conductive rods 24 are installed together. On the force-bearing pendulum column 23, the force-bearing pendulum column 23 is connected to the pair of blades 16, and a spring 25 is provided in the sensor 2 for supporting the force-bearing pendulum column 23 to swing and reset at the front end of the sensor 2. When the pair of blades 16 is subjected to force, the conductive rod 24 in the force-bearing direction of the sensor 2 is separated from the conductive balls 22 on both sides, and the normally closed conductive circuit is disconnected and becomes normally open. The main computer board 17 is built into the detector body 1, and the circuit board 28 is electrically connected to the main computer board 17. A plurality of indicator lights 10 controlled by the main computer board 17 are provided on the housing of the detector body 1;

[0026] When working, the sensor structure is mainly composed of six conductive balls 22 and three conductive rods 24. When the three conductive rods 24 are respectively inserted into the three pairs of conductive balls 22, a fixed position is determined in space. Then, the circuit board 28 and the conductive rod 26 are added. When power is applied to this structure, the conductive balls 22 and conductive rods 24 are isolated from their fixed structure by insulating material. Each conductive rod 24 and two conductive balls 22 form two normally closed switches. When the rods are separated, the normally closed state becomes normally open. Then, the normally closed switch signal of the circuit board 28 is connected to the main computer board 17 through a wire. After that, it is identified and processed by the single-chip microcomputer, and then the signal is output through the wire, and the current status is displayed by multiple indicator lights 10. When the tool touches the counter-blade at a fixed speed, a pulse signal with a fixed period will appear. The single-chip microcomputer recognizes this periodic pulse signal to determine the number of tool edges or whether the blade is worn. When the blade touches the counter-blade, the counter-blade pushes the rod structure inside to slide, separating it from the ball surface; forming an open circuit state. When there is no knife edge touching, the spring 25 squeezes the conductive rod 24 to fit the conductive ball 22 to form a closed circuit, and wear and quantity detection is performed.

[0027] For example, a four-edged tool rotates 5 times per second, and then moves slowly from the side to touch the counter blade. When the highest blade touches it, a group of pulses with an interval of 800ms will come out. The single-chip computer program recognizes and sends a signal of one blade, and lights up an indicator light to show that only one blade is currently touching the counter blade. When the tool continues to move forward, and so on, the single-chip computer judges the pulses with different time intervals to measure the number of blades. At the moment of identifying how many blades touch, the current coordinates are recorded by the machine tool, and the relative difference of the four blades can be obtained and recorded. During use, if the blade of this knife is damaged, the relative difference measured again will be different from the previous one, so that the damage of the blade can be detected.

[0028] The sensor 2 is provided with a ball seat 20 on the outer end thereof facing the counter blade 16. The inner circumference of the ball seat 20 is provided with a plurality of ball grooves 21 for clamping the conductive ball 22. The center of the ball seat 20 is provided with an axial hole for the movable cooperation of the force-bearing pendulum column 23. The outer end of the force-bearing pendulum column 23 is fixedly installed with a connector 29. The connector 29 provides a connection between the connecting frame 15 and the counter blade 16.

[0029] The conductive rod 24 is fixed to the side walls around the top of the ball seat 20. The upper cover of the ball seat 20 is provided with a limiting inner cover 27. The side wall of the limiting inner cover 27 is provided with a vertical groove along the axial direction for slidingly limiting the conductive rod 24.

[0030] During operation, the vertical slot is matched with the shaft hole with a margin, which can ensure the swing angle of the force-bearing pendulum column 23 and limit the maximum swing angle range of the conductive rod 24.

[0031] Among them, the plurality of conductive rods 26 are slidably inserted into the side wall of the limiting inner cover 27, the circuit board 28 is fixedly arranged on the inner side of the limiting inner cover 27, the spring 25 is fixed at the center position of the inner end surface of the force-bearing pendulum column 23, and the inner end of the spring 25 is clamped inside the limiting inner cover 27;

[0032] During operation, the top of the force-bearing pendulum column 23 can swing in multiple directions under the limit of the limit inner cover 27, and the spring 25 is provided to perform a reset and straightening action. Example 2

[0033] The side wall of the detector body 1 is provided with a blowing rod 11, and a trachea interface 12 is provided on one side of the blowing rod 11. The indicator light 10 is provided on the outer side wall of the detector body 1. A cable 14 is led outward from the end face of the detector body 1 away from the pair of blades 16, and a corrugated tube 13 is provided on the cable 14.

[0034] During operation, the provided bellows 13 can ensure that the connection of the cable 14 is not easily damaged during the repeated movement of the detector body 1. The blowing rod 1 provides high-speed gas to clean the tool and the dirt on the blade before measurement to ensure measurement accuracy.

[0035] Among them, the lower end of the counter blade 16 is connected to the weak link block through a screw thread, and the weak link block is connected to the connecting head 29 of the sensor 2 through a screw. During use, when encountering the situation of the above-mentioned existing method, because the weak link block is connected to the sensor 2 by a group of tightly attached surfaces fixed by screws, it will not loosen. The material of the weak link block is a metal with high hardness and good rigidity, and a small structure is designed in the middle. The breaking force of this small structure will be much smaller than the destructive force of the damaged sensor structure. When in use, due to an error of the machine tool or the operator, when the tool quickly hits the counter blade, the breaking force of this small structure will break. Due to the action of the flexible connecting piece, the broken counter blade will not be knocked away, which is convenient for the operator to replace the weak link block and reuse it.

[0036] The edge of the pair of blades 16 is set as a chamfered surface with an angle greater than 45 degrees. This design is for more clear measurement of the wear at the bottom of the tool, because the bottom is the main working position of the milling cutter.

Claims

1. A detector for measuring the number and damage of cutting edges of machine tool cutting tools, comprising a detector body (1), wherein a sensor (2) for connecting to a counter blade (16) is provided inside the detector body (1), characterized in that: The sensor (2) comprises six conductive rods (26), a circuit board (28), six conductive balls (22) and three conductive rods (24). When two conductive balls (22) are inserted into the two sides of each conductive rod (24), each conductive ball (22) is connected to the circuit board (28) through the conductive rod (26) to form a group of normally closed conductive circuits. Three groups of normally closed conductive circuits are formed in different directions in the (2). A plurality of conductive rods (24) are installed on a force-bearing pendulum column (23). The force-bearing pendulum column (23) is connected to the blade (16). The sensor (2) is connected to the blade (16). The sensor (2) is provided with a spring (25) for supporting the force-bearing pendulum (23) to swing and reset at the front end of the sensor (2). When the pair of blades (16) are subjected to force, the conductive rod (24) in the force direction of the sensor (2) is separated from the conductive balls (22) on both sides, and the normally closed conductive circuit is disconnected and becomes normally open. The main computer board (17) is built into the detector body (1), and the circuit board (28) is electrically connected to the main computer board (17). A plurality of indicator lights (10) controlled by the main computer board (17) are provided on the outer shell of the detector body (1).

2. The detector for measuring the number and damage of cutting edges of machine tool cutting tools according to claim 1, characterized in that: The sensor (2) is provided with a ball seat (20) on the outer end side facing the blade (16), and a plurality of ball grooves (21) for clamping the conductive ball (22) are provided on the inner circumference of the ball seat (20), and an axial hole for the movable engagement of the force-bearing pendulum column (23) is provided at the center of the ball seat (20), and a connector (29) is fixedly installed on the outer end of the force-bearing pendulum column (23), and the connector (29) provides a connection frame (15) for connecting with the blade (16).

3. The detector for measuring the number and damage of cutting edges of machine tool cutting tools according to claim 2, characterized in that: The conductive rod (24) is fixed to the side walls around the top of the ball seat (20), and the upper cover of the ball seat (20) is provided with a limiting inner cover (27). The side walls of the limiting inner cover (27) are provided with a vertical groove along the axial direction for slidingly limiting the conductive rod (24).

4. The detector for measuring the number and damage of cutting edges of machine tool cutting tools according to claim 3, characterized in that: The plurality of conductive rods (26) are slidably inserted into the side wall of the limiting inner cover (27), the circuit board (28) is fixedly arranged on the inner side of the limiting inner cover (27), the spring (25) is fixed at the center position of the inner end surface of the force-bearing pendulum column (23), and the inner end of the spring (25) is clamped inside the limiting inner cover (27).

5. The detector for measuring the number and damage of cutting edges of machine tool cutting tools according to claim 1, characterized in that: The side wall of the detector body (1) is provided with a blow rod (11), and a trachea interface (12) is provided on one side of the blow rod (11). The indicator light (10) is provided on the outer side wall of the detector body (1). A cable (14) is led outward from the end face of the detector body (1) away from the pair of blades (16), and a corrugated tube (13) is provided on the cable (14).

6. The detector for measuring the number and damage of cutting edges of machine tool cutting tools according to claim 1, characterized in that: The lower end of the pair of blades (16) is connected to the weak connection block via a screw thread, and the weak connection block is connected to the sensor connector (29) via a screw.

7. The detector for measuring the number and damage of cutting edges of machine tool cutting tools according to claim 1, characterized in that: The edge of the counter blade (16) is configured as a chamfered surface with an angle greater than forty-five degrees.

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