High-precision external tool measuring device of horizontal machine tool and control method

Abstract

The invention belongs to the technical field of machining equipment, and discloses a high-precision external tool measuring device of a horizontal machine tool and a control method. A guide rod is driven by an air cylinder to move in the direction of a guide groove, so that a tool measuring instrument accurately moves to a target position, and the tool measuring instrument does not need to be repeatedly disassembled; the CNC controller controls the air cylinder to drive the adjusting mechanism to act through a built-in PLC, the position of the tool measuring instrument is detected through the magnetic detection switch, the automation degree is high, and the production and machining efficiency of a single machine tool is improved advantageously.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing equipment, and in particular relates to a high-precision external tool measuring device for a horizontal machine tool and a control method. Background Art

[0002] Due to the limitation of machine tool structure, traditional CNC lathes and turning centers are not equipped with tool measuring devices. The current solution is to set up an external tool measuring instrument, which is fixed to the front end of the spindle box when in use. After the large rotary spindle or C-axis chuck clamps the workpiece, the chuck and the clamped workpiece are affected. The tool measuring instrument needs to be disassembled after use, and a special storage area needs to be set up. Repeated loading and unloading of the tool measuring instrument is cumbersome and not conducive to the production and processing efficiency of the machine tool. Summary of the invention

[0003] The object of the present invention is to provide a high-precision external tool measuring device for a horizontal machine tool, comprising a tool measuring instrument and a bracket arranged on a main spindle box of the machine tool, wherein the bracket is provided with an adjustment mechanism, wherein the adjustment mechanism is used to adjust the position of the tool measuring instrument, and the adjustment mechanism comprises a cylinder and a guide cylinder, wherein a guide rod slidably matched with the guide cylinder is passed through the guide cylinder, wherein one end of the guide rod is transmission-connected with the cylinder, and the other end is connected with the tool measuring instrument, wherein a guide groove is provided on an arcuate side wall of the guide cylinder, and a positioning shaft is provided at an end of the guide rod located on one side of the cylinder, wherein one end of the positioning shaft passes through the guide groove, and the positioning shaft slidably matches with the guide groove to drive the guide rod to slide and deflect along the guide cylinder.

[0004] Furthermore, a connecting sleeve is sleeved on the end of the guide rod, one side of the connecting sleeve is transmission-connected to the cylinder, and the other side is provided with a combined bearing. The connecting sleeve is slidingly matched with the guide cylinder through the combined bearing, and the positioning shaft is arranged on the connecting sleeve.

[0005] Furthermore, a guide sleeve is provided at one end of the guide cylinder away from the cylinder, and the guide sleeve is slidably sleeved on the guide rod. A machine tool guard plate is provided on one side of the spindle box, and the guide sleeve passes through the machine tool guard plate, and the guide sleeve is provided with a connecting plate and a flange, and the connecting plate and the flange cooperate to fix the guide sleeve to the machine tool guard plate.

[0006] Furthermore, the machine tool protection plate is provided with a protection cover, and the protection cover is used to cover the tool measuring instrument located at an initial position.

[0007] Furthermore, it also includes a CNC controller, the air inlet and air outlet of the cylinder are respectively provided with solenoid valves, the cylinder is provided with a first magnetic detection switch and a second magnetic detection switch, and the CNC controller is electrically connected to the solenoid valve, the first magnetic detection switch, the second magnetic detection switch and the tool measuring instrument respectively.

[0008] Another object of the present invention is to provide a control method for a high-precision external tool measuring device for a horizontal machine tool, using the high-precision external tool measuring device for a horizontal machine tool, comprising the following steps: The CNC controller (with built-in PLC) issues tool setting instructions; PLC determines the working status of the machine tool spindle through internal registers; (3) When the spindle is stationary, the PLC detects the current position of the tool measuring instrument through the magnetic detection switch; when the spindle is in operation, the PLC controls the alarm to sound an alarm; (4) When the tool measuring instrument is in the initial position, the PLC controls the cylinder to run through the solenoid valve. The cylinder pushes the guide rod to extend and deflect, so that the tool measuring instrument reaches the specified position. The CNC controller controls the movement of the tool measuring instrument and completes the automatic compensation of the tool length. When the tool measuring instrument is in an abnormal position, the PLC controls the alarm to sound an alarm; (5) After the tool probe is set, the PLC controls the cylinder through the solenoid valve and drives the tool probe to move to the initial position through the guide rod.

[0009] The present invention has the following beneficial effects.

[0010] 1. The present invention provides a high-precision external tool measuring device for a horizontal machine tool. The adjusting mechanism and the cylinder are fixed to one side of the spindle box by a bracket. The guide cylinder in the adjusting mechanism is provided with a guide groove composed of a straight section and a deflection section. The cylinder drives the guide rod to drive the tool measuring instrument to move and deflect at the same time, thereby driving the tool measuring instrument to move from an initial position to a measuring position. The bracket and the adjusting mechanism are located on the inner side of the machine tool guard plate. The initial position of the tool measuring instrument is located on the outer side of the machine tool guard plate, which does not affect the operation of the spindle, does not require repeated installation and disassembly of the tool measuring instrument, and can accurately move the tool measuring instrument to a target position when in use, thereby simplifying the operation and significantly improving the production and processing efficiency of the machine tool.

[0011] 2. The present invention also provides a control method for a high-precision external tool measuring device of a horizontal machine tool, which uses a CNC controller to automatically detect the working state of the spindle and the position of the tool measuring instrument, controls the cylinder to drive the tool measuring instrument to extend and deflect through an adjustment mechanism, and feeds back an in-position signal to the CNC controller through a magnetic switch. The controller automatically runs the tool setting program, and the tool movement triggers the tool measuring instrument to complete tool data collection and processing. After the detection is completed, the tool measuring instrument returns to the initial position, and the degree of automation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the connection structure of the bracket, the adjustment mechanism and the tool measuring instrument in the present invention.

[0013] Figure 2 yes Figure 1 Schematic diagram of the BB cross-section structure.

[0014] Figure 3 It is a schematic diagram of the deflection angle of the guide rod in the present invention.

[0015] Figure 4 It is a schematic diagram of the local structure inside the guide cylinder when the guide rod moves to the target position in the present invention.

[0016] Figure 5 It is a structural schematic diagram of the guide groove in the present invention.

[0017] Figure 6 It is a flow chart of a control method for a high-precision external tool measuring device for a horizontal machine tool in the present invention.

[0018] In the figure: 100, bracket; 101, mounting plate; 102, support arm; 200, adjustment mechanism; 201, cylinder; 202, guide cylinder; 203, guide sleeve; 204, guide groove; 205, first magnetic detection switch; 206, second magnetic detection switch; 207, protective cover; 208, guide rod; 209, cylinder end flange; 210, connecting sleeve; 211, combined bearing; 212, locking nut; 213, connecting flange; 214, connecting plate; 215, flange; 216, positioning shaft; 217, deep groove ball bearing; 218, hose connector; 219, straight section; 220, deflection section; 300, tool measuring instrument; 400, machine tool guard plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Reference Figure 1-Figure 6 A high-precision external tool measuring device for a horizontal machine tool comprises a support 100, and an adjusting mechanism 200 and a tool measuring instrument 300 arranged on the support 100. The support 100 is fixed to one side of a main spindle box of the machine tool, a machine tool guard plate 400 is arranged on one side of the main spindle box, and the tool measuring instrument 300 is arranged on the adjusting mechanism 200. The position of the tool measuring instrument 300 is regulated by the adjusting mechanism 200. The length and diameter of the turning tool and the milling tool are accurately measured by the tool measuring instrument 300. The CNC controller updates the deviation according to the measurement data of the tool measuring instrument, and returns to a safe position (initial position) after the measurement is completed.

[0021] The support 100 includes a mounting plate 101 and a support arm 102. The support arm 102 adopts a bent structure so that a gap is left between the adjustment mechanism 200 and the spindle box to ensure that the extended position of the tool measuring instrument 300 is safely away from the spindle chuck.

[0022] The adjustment mechanism 200 includes a cylinder 201 and a guide cylinder 202. The guide cylinder 202 is arranged on the support 100. The guide cylinder 202 is a cylindrical structure with two ends connected. The cylinder 201 is arranged at one end of the guide cylinder 202. A guide rod 208 is arranged in the guide cylinder 202. The tool measuring instrument 300 is arranged at the end of the guide rod 208. The cylinder 201 drives the guide rod 208 to extend and deflect at a certain angle to drive the tool measuring instrument 300 to move to a specified position. Specifically, the cylinder 201 is connected to one end of the guide cylinder 202 by screws through the cylinder end flange 209, and the other end of the guide cylinder 202 is provided with a guide sleeve 203, and the end of the guide sleeve 203 passes through the protective cover 400 of the main shaft box. The guide sleeve 203 is slidably sleeved on the guide rod 208, and the end of the guide rod 208 close to the cylinder 201 is sleeved with a connecting sleeve 210, and the connecting sleeve 210 is provided with a combined bearing 211. The connecting sleeve 210 is slidably matched with the guide cylinder 202 through the combined bearing 211. The piston rod of the cylinder 201 is threadedly connected to the locking nut 212, and the locking nut 212 is connected to the connecting sleeve 210 through the connecting flange 213. The connecting sleeve 210 moves with the guide rod 208, so that the cylinder 201 pushes the guide rod 208 to move, and the guide cylinder 202 side A guide groove 204 is provided on the wall, and a positioning shaft 216 is provided on the connecting sleeve 210. One end of the positioning shaft 216 passes through the guide groove 204. A deep groove ball bearing 217 is provided on the positioning shaft 219. The end of the positioning shaft 216 passing through the guide groove 204 is provided with a hose connector 218 for connecting the signal cable of the tool measuring instrument 300. The positioning shaft 216 cooperates with the guide groove 204 to drive the guide rod 208 to move and rotate at a certain angle. The guide groove 204 includes a straight section 219 and a deflection section 220. The straight section 219 is located on the side close to the cylinder 201. One end of the deflection section 220 is connected to the straight section 219, and the other end extends in a spiral direction around the guide cylinder 202 to realize that the guide rod 208 moves and deflects at a certain angle a, thereby driving the tool measuring instrument 300 to move to the target position.

[0023] The positioning shaft 216 moves along the straight section of the guide groove 204 to the deflection section, and the deflection angle a of the guide rod 208 is 85°, that is, the tool measuring instrument 300 is deflected by 85°.

[0024] In one embodiment, the machine tool guard plate 400 is provided with a through hole for the guide sleeve 203 to pass through, the guide sleeve 203 passes through the machine tool guard plate 400, and the guide sleeve 203 is provided with a connecting plate 214 and a flange 215. The guide sleeve 203 is fixed to the machine tool guard plate 400 by the cooperation of the connecting plate 214 and the flange 215 to assist in supporting the guide cylinder 202.

[0025] In one embodiment, a protective cover 207 is provided on one side of the machine tool guard plate 400 , and the tool probe 300 is located in the protective cover 207 in the initial position, that is, the guide rod 208 is located in the guide cylinder 202 , so as to reduce the risk of coolant erosion of the tool probe 300 .

[0026] In one embodiment, the external tool measuring device also includes a CNC controller, the CNC controller has a built-in PLC, the air inlet and exhaust ports of the cylinder 201 are respectively provided with solenoid valves, the cylinder 201 is provided with a magnetic detection switch, the magnetic detection switch is used to detect the position of the cylinder piston rod, thereby obtaining the position of the tool measuring instrument 300, the magnetic detection switch includes a first magnetic detection switch 205 and a second magnetic detection switch 206, wherein the first magnetic detection switch 205 is set at the initial position of the cylinder piston rod, and the second magnetic detection switch 206 is set at the target position after the cylinder piston rod is extended, the initial position is the state where the cylinder piston rod is not extended, and the target position is the state where the piston rod is extended to the specified position, and the CNC controller is electrically connected to the first magnetic detection switch 205, the second magnetic detection switch 206, the solenoid valve and the tool measuring instrument 300 respectively.

[0027] The CNC controller obtains the position of the tool measuring instrument 300 through the feedback of the magnetic detection switch, and controls the cylinder 201 to work through the solenoid valve, thereby controlling the tool measuring instrument 300 to move to the designated position for detection through the adjustment mechanism 200.

[0028] The present invention also provides a control method for a high-precision external tool measuring device for a horizontal machine tool, which adopts the high-precision external tool measuring device for a horizontal machine tool and comprises the following steps: The CNC controller issues a tool setting command and transmits the command to its built-in PLC; PLC determines the working status of the machine tool spindle through internal registers; When the spindle is stationary, the PLC detects the current position of the tool measuring instrument through the magnetic detection switch; when the spindle is in operation, the PLC controls the alarm to sound an alarm; When the tool measuring instrument is in the initial position, the PLC controls the cylinder to run through the solenoid valve. The cylinder pushes the guide rod to extend and deflect, so that the tool measuring instrument reaches the specified position. The CNC controller sends instructions to control the tool measuring instrument and completes the automatic compensation of the tool length. When the tool measuring instrument is in an abnormal position, the PLC controls the alarm to sound an alarm; After the tool measuring instrument has completed the tool setting, the PLC solenoid valve controls the cylinder to move, and drives the tool measuring instrument to the initial position through the guide rod, and the tool length measurement and compensation process is completed.

[0029] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision external tool measuring device for a horizontal machine tool, characterized in that: The invention comprises a tool measuring instrument and a bracket arranged on a main spindle box of a machine tool, wherein the bracket is provided with an adjusting mechanism, wherein the adjusting mechanism is used to adjust the position of the tool measuring instrument, and the adjusting mechanism comprises a cylinder and a guide cylinder, wherein a guide rod slidably matched with the guide cylinder is passed through the guide cylinder, wherein one end of the guide rod is transmission-connected with the cylinder, and the other end is connected with the tool measuring instrument, wherein a guide groove is provided on an arcuate side wall of the guide cylinder, and a positioning shaft is provided at an end of the guide rod located on one side of the cylinder, wherein one end of the positioning shaft passes through the guide groove, and the positioning shaft slidably matches with the guide groove to drive the guide rod to slide and deflect along the guide cylinder.

2. The high-precision external tool measuring device for horizontal machine tools according to claim 1, characterized in that: The end of the guide rod is sleeved with a connecting sleeve, one side of the connecting sleeve is transmission-connected to the cylinder, and the other side is provided with a combined bearing. The connecting sleeve is slidably matched with the guide cylinder through the combined bearing, and the positioning shaft is arranged on the connecting sleeve.

3. The high-precision external tool measuring device for horizontal machine tools according to claim 1, characterized in that: A guide sleeve is provided at one end of the guide cylinder away from the cylinder, and the guide sleeve is slidably sleeved on the guide rod. A machine tool guard plate is provided on one side of the spindle box, and the guide sleeve passes through the machine tool guard plate. The guide sleeve is provided with a connecting plate and a flange, and the connecting plate and the flange cooperate to fix the guide sleeve to the machine tool guard plate.

4. The high-precision external tool measuring device for horizontal machine tools according to claim 1, characterized in that: The machine tool protection plate is provided with a protection cover, and the protection cover is used to cover the tool measuring instrument located at the initial position.

5. The high-precision external tool measuring device for horizontal machine tools according to claim 1, characterized in that: It also includes a CNC controller. The air inlet and the air outlet of the cylinder are respectively provided with solenoid valves. The cylinder is provided with a first magnetic detection switch and a second magnetic detection switch. The CNC controller is electrically connected to the solenoid valve, the first magnetic detection switch, the second magnetic detection switch and the tool measuring instrument respectively.

6. A control method for a high-precision external tool measuring device for a horizontal machine tool, using the high-precision external tool measuring device for a horizontal machine tool as claimed in claim 5, characterized in that: The steps include: The CNC controller (with built-in PLC) issues tool setting instructions; PLC determines the working status of the machine tool spindle through internal registers; (3) When the spindle is stationary, the PLC detects the current position of the tool measuring instrument through the magnetic detection switch; when the spindle is in operation, the PLC controls the alarm to sound an alarm; (4) When the tool measuring instrument is in the initial position, the PLC controls the cylinder to run through the solenoid valve. The cylinder pushes the guide rod to extend and deflect, so that the tool measuring instrument reaches the specified position. The CNC controller controls the movement of the tool measuring instrument and completes the automatic compensation of the tool length. When the tool measuring instrument is in an abnormal position, the PLC controls the alarm to sound an alarm; (5) After the tool probe is set, the PLC controls the cylinder through the solenoid valve and drives the tool probe to move to the initial position through the guide rod.

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