CN204700670U - Digit Control Machine Tool adherence anti-error system - Google Patents

Abstract

The utility model discloses a numerically controlled machine tool close error prevention system, comprising an air compressor, a pressure regulating valve, a PLC processing unit, a clamping fixture and an air pressure sensor, the PLC processing unit is installed on the numerically controlled machine tool, and the air compressor Connected with the pressure regulating valve, the clamping fixture includes a sealed air chamber and a groove for placing the workpiece, the sealed air chamber is connected to the air compressor through the air pipe, the air pipe is provided with a solenoid valve, and the bottom of the groove is provided with a positioning hole And the flange, the side wall of the groove is provided with a positioning rod, and the flange and the positioning rod are provided with an airtight detection port that communicates with the sealed air chamber. The sealed air chamber is connected to the air pressure sensor through a conduit, and the air pressure sensor is connected to the pressure regulating valve. , the PLC processing unit signal is connected with a machine tool spindle with a cutter. The utility model aims to solve the problems that the clamping is not in place and the equipment and the cutter are easily damaged in the existing numerical control machining.

Description

CNC machine tool close error prevention system

technical field

The utility model relates to a control system of a machine tool, in particular to a close-adhesion error prevention system for a numerically controlled machine tool.

Background technique

CNC machine tools have the characteristics of high efficiency, good flexibility, and stable and reliable processing quality. At present, most shaft parts are mainly processed by CNC machine tools. According to the clamping characteristics of CNC machine tools, firstly, the workpiece is placed on the fixture manually, and then through the fixture To clamp the workpiece, the fixture is powered by a hydraulic cylinder, so that the workpiece is clamped through the clamping mechanism and the positioning mechanism. Existing CNC machining is often the production of large batches of workpieces. Operators need to repeatedly replace the workpieces on the pneumatic fixtures. During the production process, employees may not place the fixtures in place when clamping products, which will cause equipment, tools, Fixtures and products are damaged, causing production to stop, seriously affecting production and causing high costs.

Utility model content

The purpose of the utility model is to provide a numerical control machine tool adhesion and error prevention system to solve the problems of insufficient clamping and easy damage of equipment and cutting tools in the existing numerical control machining.

In order to achieve the above object, the utility model provides the following technical solutions: CNC machine tool close error prevention system, including air compressor, pressure regulating valve, PLC processing unit, clamping fixture and air pressure sensor, PLC processing unit is installed in the numerical control On the machine tool, the air compressor is connected to the pressure regulating valve. The clamping fixture includes a sealed air chamber and a groove for placing the workpiece. The sealed air chamber is connected to the air compressor through the air pipe. The air pipe is provided with a solenoid valve. The groove The bottom of the tank is provided with a positioning hole and a flange, and the side wall of the groove is provided with a positioning rod. The flange and the positioning rod are provided with an airtight detection port connected with the sealed air chamber. The sealed air chamber is connected to the air pressure sensor through a conduit. The sensor is connected with the pressure regulating valve, and the signal of the PLC processing unit is connected with the main shaft of the machine tool with the tool.

The principle of this scheme is as follows: the workpiece is clamped on the clamping fixture. By placing the workpiece in the groove of the clamping fixture, the positioning hole and flange at the bottom of the groove will position the workpiece, and the side wall of the groove will The positioning rod can also limit and position the workpiece. After the workpiece is clamped, the air compressor fills the sealed air chamber with gas through the conduit, and adjusts the air pressure value detected by the air pressure sensor through the pressure regulating valve to be constant. , by adjusting the solenoid valve on the air pipe, the air compressor can also ventilate into the sealed air chamber. Since the flange and the positioning rod are provided with an airtight detection port that communicates with the sealed air chamber, at this time, if the workpiece is placed well, it will Cover the airtight detection port to increase the pressure in the sealed air chamber. The air pressure sensor detects the corresponding air pressure change and sends an OK signal to the PLC processing unit. The PLC processing unit controls the machine tool spindle with the tool to start working and the processing starts. If the workpiece leaks air from the air-tight detection port due to chips or poor placement, and the air pressure sensor cannot detect the corresponding air pressure change, an NG signal will be sent to the PLC processing unit, and the equipment will have no processing action, and the operator needs to re-clamp to avoid Due to improper clamping of the workpiece, the workpiece size is unqualified, the tool is broken, the tool is collided, the equipment is faulty, damaged, etc. during the processing, so as to ensure the safety of production personnel and equipment, and will not cause waste of production line costs.

In the above scheme, the clamping and error prevention of the workpiece is through the sensitive detection of the air pressure value by the sensor, and the change of the air pressure value is determined by the placement of the workpiece on the fixture and the accuracy of the clamping, and by judging whether the workpiece is placed Therefore, the structure and system are also known as the tightness and error prevention system applied to CNC machine tools.

Preferably, the PLC processing unit is provided with a liquid crystal display, and the liquid crystal display can display the pressure value of the air compressed by the air compressor and the adjustment value of the pressure regulating valve in real time, and can well realize human-computer interaction and docking.

Preferably, the PLC processing unit is electrically connected with an alarm, and when the air pressure sensor detects a corresponding signal change due to chips or poor placement of the workpiece, the signal transmitted to the PLC processing unit will trigger the alarm to send an alarm to remind the operator Re-clamp the workpiece.

Preferably, the trachea connection and the conduit connection on the sealed air chamber are provided with gaskets and rubber rings, and the gaskets and rubber rings are installed to ensure that the sealed air chamber has good airtightness, so that the air pressure sensor can detect The air pressure value is more accurate.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the present utility model CNC machine tool adhesion prevention system embodiment.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

The reference signs in the drawings of the description include: air compressor 1, pressure regulating valve 2, PLC processing unit 3, clamping fixture 4, air pressure sensor 5, liquid crystal display 6, alarm 7, air pipe 8, solenoid valve 9 , Machine tool spindle 10, sealed air chamber 41, groove 42, positioning hole 43, flange 44, positioning rod 45, airtight detection port 46.

As shown in Figure 1, the CNC machine tool is closely connected with the error prevention system, including air compressor 1, pressure regulating valve 2, PLC processing unit 3, clamping fixture 4, and air pressure sensor 5. The PLC processing unit 3 is installed on the CNC machine tool. A liquid crystal display 6 is installed on the processing unit 3, and the PLC processing unit 3 is electrically connected to an alarm 7, the air compressor 1 is connected to the pressure regulating valve 2, and the clamping fixture 4 includes a sealed air chamber 41 and a groove for placing the workpiece 42, the sealed air chamber 41 is connected to the air compressor 1 through the air pipe 8, the air pipe 8 is equipped with a solenoid valve 9, the bottom of the groove 42 is provided with a positioning hole 43 and a flange 44, and the side wall of the groove 42 is provided with a positioning rod 45 , the flange 44 and the positioning rod 45 are provided with an airtight detection port 46 communicating with the sealed air chamber 41, the sealed air chamber 41 is connected with the air pressure sensor 5 through a conduit, the air pressure sensor 5 is connected with the pressure regulating valve 2, and the PLC processing unit 3 The signal is connected with the machine tool spindle 10 with the cutting tool, and the air pipe 8 connection and the conduit connection on the sealed air chamber 41 are all provided with sealing gaskets and rubber rings.

The PLC processing unit in this embodiment adopts microprocessor ARM STM32F107, and the air pressure sensor adopts HP203B 24-bit high-precision air pressure sensor, and the model is HP203B.

In this embodiment, the workpiece is clamped on the clamping fixture 4. By placing the workpiece in the groove 42 of the clamping fixture 4, the positioning hole 43 and the flange 44 at the bottom of the groove 42 play a role in positioning the workpiece. The positioning rod 43 on the side wall of the groove 42 can also limit and position the workpiece. After the workpiece is clamped, the air compressor 1 fills the sealed air chamber 41 with gas through the conduit, and adjusts the air pressure through the pressure regulating valve 2. The air pressure value detected by the sensor 5 is constant, and meanwhile, by adjusting the electromagnetic valve 9 on the air pipe 8, the air compressor 1 is also ventilated into the sealed air chamber 41. The airtight detection port 46 connected with the chamber 41, at this time, if the workpiece is placed well, the airtight detection port 46 will be blocked, the pressure in the sealed air chamber 41 will increase, and the air pressure sensor 5 will detect the corresponding air pressure change value, and An OK signal is sent to the PLC processing unit 3, and the PLC processing unit 3 controls the machine tool spindle 10 with the tool to start working, and the processing starts. If the workpiece leaks air from the airtight detection port 46 due to chips or poor placement, and the air pressure sensor 5 cannot detect the corresponding air pressure change value, an NG signal will be sent to the PLC processing unit 3, and the equipment will have no processing action, and the operator needs to reinstall it. Clamping, to avoid unqualified workpiece size, tool breakage, tool collision and equipment failure, damage, etc. during processing due to improper clamping of the workpiece, to ensure the safety of production personnel and equipment, and will not cause waste of production line costs.

The LCD processing unit 3 is equipped with a liquid crystal display 6. The liquid crystal display 6 can display the pressure value of the air compressed by the air compressor 1 and the adjustment value of the pressure regulating valve 2 in real time, which can well realize human-machine interaction and docking. PLC processing Unit 3 is electrically connected with an alarm 7. When the air pressure sensor 5 detects a corresponding signal change due to chipping or poor placement of the workpiece, the signal transmitted to the PLC processing unit 3 will trigger the alarm 7 to issue an alarm, reminding the operator to reinstall. Clamping parts, the trachea 8 joints on the sealed air chamber 41 and the conduit joints are all provided with gaskets and rubber rings, and the installation of the gaskets and rubber rings is to ensure that the sealed air chamber 41 has good airtightness, so that the air pressure sensor 5 The detected air pressure value is more accurate.

What is described above is only the preferred embodiment of the present utility model. It should be pointed out that for those skilled in the art, some deformations and improvements can be made without departing from the structure of the present utility model. These should also be regarded as The protection scope of the utility model, these all can not affect the effect that the utility model implements and the practicability of the patent.

Claims (4)

1. Digit Control Machine Tool adherence anti-error system, it is characterized in that, comprise air compressor machine, pressure regulator valve, PLC processing unit, clamping jig and baroceptor, PLC processing unit is arranged on described Digit Control Machine Tool, air compressor machine is connected with pressure regulator valve, described clamping jig comprises the groove of sealed air chamber and place work piece, sealed air chamber connects air compressor machine by tracheae, tracheae is provided with magnetic valve, the bottom of described groove is provided with locating hole and flange, the sidewall of groove is provided with backstay, flange and backstay are provided with the airtight detection mouth communicated with sealed air chamber, sealed air chamber is connected with baroceptor by conduit, baroceptor is connected with pressure regulator valve, described PLC processing unit signal is connected with the machine tool chief axis of band cutter.

2. Digit Control Machine Tool adherence anti-error system as claimed in claim 1, is characterized in that, described PLC processing unit is provided with LCDs.

3. Digit Control Machine Tool adherence anti-error system as claimed in claim 1, it is characterized in that, described PLC processing unit electricity is connected to alarm.

4. Digit Control Machine Tool adherence anti-error system as claimed in claim 1, it is characterized in that, the tracheae junction in described sealed air chamber and conduit connection are equipped with sealing gasket and rubber ring.