A numerically controlled tool with deflection protection

Abstract

The utility model belongs to numerical control machine tool technical field, concretely is a kind of deflection protection numerical control cutter, include: driving rod, positioning assembly on the driving rod and the cutter head assembled on the positioning assembly;The positioning assembly includes protection mechanism.The utility model can insert cutter head between clamping plate after, start hydraulic pump and increase the hydraulic pressure in hydraulic chamber, hydraulic oil first pushes the plate and makes clamping plate clamp towards cutter head, when hydraulic pressure exceeds the deformation force of spring, again push movable plate and move towards cutter head, threaded rod is screwed into threaded hole by thrust in the process, finally, continuously pressurize to clamping plate and cutter head clamping standard, when cutter head is subjected to violent impact, pressure sensor will monitor that pressure exceeds safety range, when, hydraulic pump immediately carries out pressure relief operation, makes clamping plate loosen cutter head, and movable plate is displaced to the upper position simultaneously, and cutter head is instantaneously pulled up, to avoid the continuous damage of cutter head, effectively solve the problem of cutter head operation damage.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, specifically to a deflection-protected CNC cutting tool. Background Technology

[0002] CNC cutting tools are tools used for cutting processes in mechanical manufacturing, also known as cutting tools. In a broad sense, cutting tools include both cutting tools and grinding wheels; in addition to cutting inserts, "CNC cutting tools" also include accessories such as tool holders and tool shanks.

[0003] During CNC machining, cutting tools, especially finishing tools, may experience unexpected and severe collisions due to programming errors, loose workpiece clamping, internal hard spots in the material, measurement errors, or other reasons. Traditional rigid cutting tools or simple stop protection systems do not react quickly enough, which can easily lead to expensive cutting tools chipping, breaking, or even damage to the workpiece and machine tool spindle. At the same time, after machining or during tool changing, the cutting tool needs to be retracted into the tool magazine or a safe position. Traditional linear retraction methods are prone to scraping or colliding with the workpiece, fixture, or other parts of the machine tool when space is limited or the cutting tool posture is complex, posing safety and damage risks. Therefore, we propose a deflection-protected CNC cutting tool. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A deflection-protected CNC cutting tool includes: a drive rod, a positioning assembly disposed on the drive rod, and a cutting head mounted on the positioning assembly; the positioning assembly includes a protective mechanism, a clamping mechanism disposed at the bottom of the protective mechanism, and a connecting mechanism disposed within the clamping mechanism; the protective mechanism includes an upper connecting shaft fixed to the end of the drive rod, a rotator mounted in the middle of the upper connecting shaft, a lower connecting shaft fixed below the rotator, and a protective shell mounted on the side of the upper connecting shaft; the connecting mechanism includes a hydraulic cavity opened in the lower connecting shaft, a hydraulic pipe connected to the end of the hydraulic cavity, a hydraulic pump installed in the upper connecting shaft and connected to the hydraulic pipe, a movable plate embedded in the lower connecting shaft, a spring disposed on the outside of the movable plate, a threaded rod clamped in the middle of the movable plate, and a threaded hole opened at the end of the cutting head.

[0007] In a preferred embodiment, the present invention can be further configured such that the clamping mechanism includes a flow divider cavity formed on the lower connecting shaft and located on the side of the hydraulic cavity, a push plate clamped at the bottom end of the flow divider cavity, a clamping plate fixed to the outer end of the push plate, and a pressure sensor embedded in the clamping plate.

[0008] In a preferred embodiment, the present invention can be further configured such that: a snap-fit ​​plate is installed on the side of the upper connecting shaft, and a snap-fit ​​groove is provided on the lower connecting shaft to be adapted to snap-fit ​​the snap-fit ​​plate.

[0009] In a preferred embodiment, the present invention can be further configured such that a ball bearing is fitted at the end of the threaded rod.

[0010] In a preferred embodiment, the present invention can be further configured such that: two sets of push plates and clamping plates are provided on the same side, and a connecting piece is connected between the push plates.

[0011] In a preferred embodiment, the present invention can be further configured such that a hydraulic sensor is installed inside the diversion cavity.

[0012] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0013] 1. This utility model, through a positioning component, allows the hydraulic pump to be activated to increase the hydraulic pressure in the hydraulic chamber after the cutter head is inserted between the clamping plates. At this time, the hydraulic oil first pushes the push plate to clamp the clamping plate towards the cutter head. When the hydraulic pressure exceeds the deformation force of the spring, it pushes the movable plate towards the cutter head. During this process, the threaded rod is pushed into the threaded hole by the thrust. Finally, the pressure is continuously increased until the clamping plate clamps the cutter head to the required standard. When the cutter head is subjected to a violent impact, the pressure sensor will detect that the pressure exceeds the safe range. At this time, the hydraulic pump immediately performs a pressure relief operation, causing the clamping plate to release the cutter head. At the same time, the movable plate moves upward and instantly pulls the cutter head upward, thereby avoiding continuous damage to the cutter head. This device effectively solves the problem of cutter head damage during operation.

[0014] 2. This utility model, through its positioning component, allows the cutter head to be pulled up in an emergency, and then the lower connecting shaft to be driven by a rotator to rotate toward the protective shell until the lower connecting shaft is fully inserted into the protective shell, thus providing subsequent protection. It is highly practical. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the CNC cutting tool with deflection protection according to this utility model;

[0016] Figure 2 This is an enlarged view of point A of the CNC cutting tool with deflection protection according to this utility model.

[0017] Figure label:

[0018] 100. Drive rod; 110. Cutting head;

[0019] 200. Positioning component; 210. Upper connecting shaft; 211. Snap-fit ​​plate; 212. Snap-fit ​​slot; 220. Rotator; 230. Lower connecting shaft; 240. Protective housing;

[0020] 310. Hydraulic chamber; 320. Hydraulic pipe; 330. Hydraulic pump; 340. Movable plate; 350. Spring; 360. Threaded rod; 361. Ball bearing; 370. Threaded hole;

[0021] 410. Diverter chamber; 411. Hydraulic sensor; 420. Push plate; 421. Connecting piece; 430. Clamping plate; 440. Pressure sensor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0023] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0024] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a deflection-protected CNC cutting tool.

[0025] Combination Figure 1-2 As shown, the present invention provides a deflection protection CNC cutting tool, comprising: a drive rod 100, a positioning component 200 disposed on the drive rod 100, and a cutting head 110 assembled on the positioning component 200.

[0026] The positioning assembly 200 includes a protective mechanism, a clamping mechanism disposed at the bottom of the protective mechanism, and a connecting mechanism disposed within the clamping mechanism; the protective mechanism includes an upper connecting shaft 210 fixed to the end of the drive rod 100, a rotator 220 installed in the middle of the upper connecting shaft 210, a lower connecting shaft 230 fixed below the rotator 220, and a protective shell 240 installed on the side of the upper connecting shaft 210; the connecting mechanism includes a hydraulic chamber 310 formed within the lower connecting shaft 230. The hydraulic system includes a hydraulic pipe 320 connected to the end of the hydraulic chamber 310, a hydraulic pump 330 installed in the upper connecting shaft 210 and connected to the hydraulic pipe 320, a movable plate 340 embedded in the lower connecting shaft 230, a spring 350 disposed on the outside of the movable plate 340, a threaded rod 360 clamped in the middle of the movable plate 340, and a threaded hole 370 opened at the end of the cutter head 110. The clamping mechanism includes a diversion chamber 410 opened on the lower connecting shaft 230 and located on the side of the hydraulic chamber 310, and a clamping device. The push plate 420 mounted at the bottom of the diversion chamber 410, the clamping plate 430 fixed to the outer end of the push plate 420, and the pressure sensor 440 embedded in the clamping plate 430, through the positioning assembly 200, allow the hydraulic pump 330 to be activated to increase the hydraulic pressure in the hydraulic chamber 310 after the cutter head 110 is inserted between the clamping plates 430. At this time, the hydraulic oil first pushes the push plate 420 to clamp the clamping plate 430 toward the cutter head 110. When the hydraulic pressure exceeds the deformation force of the spring 350, it then pushes the movable plate 340 toward the cutter head 110. During the movement, the threaded rod 360 is pushed into the threaded hole 370 by the thrust, and finally the pressure is continuously applied until the clamping plate 430 clamps the cutter head 110 to the standard. When the cutter head 110 is subjected to a violent impact, the pressure sensor 440 will detect that the pressure exceeds the safe range. At this time, the hydraulic pump 330 will immediately perform a pressure relief operation, causing the clamping plate 430 to loosen the cutter head 110. At the same time, the movable plate 340 will move upward and pull the cutter head 110 upward instantly, thereby avoiding continuous damage to the cutter head 110. This device effectively solves the problem of damage to the cutter head 110 during operation.

[0027] Furthermore, a snap-fit ​​plate 211 is installed on the side of the upper connecting shaft 210, and a snap-fit ​​groove 212 is provided on the lower connecting shaft 230 to fit and snap into the snap-fit ​​plate 211. The hydraulic pump 330 can be maintained by removing and installing the snap-fit ​​plate 211. When the upper connecting shaft 210 and the lower connecting shaft 230 are vertically connected, this connection can ensure their structural strength and prevent deformation of the upper connecting shaft 210 and the lower connecting shaft 230 during rotational operation. The design is reasonable.

[0028] Specifically, the end of the threaded rod 360 is fitted with a ball bearing 361. The ball bearing 361 ensures the smoothness of the threaded rod 360 during rotation. As is well known, the threaded rod 360 requires rotational force to enter the threaded hole 370. However, this is not the only way. By setting the smoothness between the threaded rod 360 and the threaded hole 370 to a higher level, downward pressure can be used to make the threaded rod 360 rotate into the threaded hole 370 to complete the connection and fixation. When the hydraulic chamber 310 is depressurized, the movable plate 340 will quickly rebound. At this time, the threaded rod 360 will not directly disengage from the threaded hole 370, but will move upward first. It will only disengage when the cutter head 110 is subjected to a downward force exceeding the force required for the rotation between the threaded rod 360 and the threaded hole 370. Therefore, this method can be achieved and is a conventional setting.

[0029] Furthermore, two sets of push plates 420 and clamping plates 430 are provided on the same side, and a connecting piece 421 is connected between the push plates 420. The two sets of push plates 420 and clamping plates 430 can clamp the cutter head 110 at multiple positions, and at the same time, the pressure sensor 440 can monitor more accurately. The connecting piece 421 adopts a rubber sheet structure, which can ensure that the push plates 420 are synchronized while also allowing the push plates 420 to be appropriately misaligned, so as not to affect the individual clamping and monitoring of the cutter head 110.

[0030] Furthermore, a hydraulic sensor 411 is installed in the diversion cavity 410, which can monitor the hydraulic pressure in the hydraulic cavity 310 and the diversion cavity 410, thereby facilitating the control of the clamping force. The hydraulic pump 330 has sufficient hydraulic oil, which can change the pressure in the hydraulic cavity 310 under the in-and-out operation, thereby controlling the displacement of the push plate 420 and the movable plate 340.

[0031] Specifically, the above technical solution also includes a controller for operation, which is installed on the CNC machine tool used in this application and is directly connected to this device for automated control operations. The controller adopts a programmable logic controller (PLC) combined with a dedicated motion control module / card. The core processor is a high-performance industrial-grade microprocessor based on ARM Cortex-A or RISC architecture, located in the main control unit (CPU) of the PLC.

[0032] Control methods include setting working parameters (target position, speed, processing quantity, etc.), selecting programs, and starting / stopping the equipment via HMI (human-machine interface - touch screen);

[0033] The host computer system (such as SCADA, MES) sends control commands and recipe data through the network;

[0034] The signal transmission method is that the motion controller generates a pulse + direction signal (PUL / DIR) or an analog signal (±10V) and sends it to the servo drive via a high-speed industrial bus (such as EtherCAT, PROFINET IRT, CANopen).

[0035] The working principle and usage process of this utility model are as follows: First, after inserting the cutter head 110 between the clamping plates 430, the hydraulic pump 330 is started to increase the hydraulic pressure in the hydraulic chamber 310. At this time, the hydraulic oil first pushes the push plate 420 to clamp the clamping plate 430 towards the cutter head 110. When the hydraulic pressure exceeds the deformation force of the spring 350, the movable plate 340 is pushed to move towards the cutter head 110. During the process, the threaded rod 360 is pushed into the threaded hole 370 by the thrust. Finally, the pressure is continuously increased until the clamping plate 430 clamps the cutter head 110. When the cutter head 110 is subjected to a violent impact, the pressure sensor 440 will detect that the pressure exceeds the safe range. At this time, the hydraulic pump 330 will immediately perform a pressure relief operation, causing the clamping plate 430 to loosen the cutter head 110. At the same time, the movable plate 340 will move upward to pull the cutter head 110 upward instantly. After the cutter head 110 is pulled up, the lower connecting shaft 230 will be driven by the rotator 220 to rotate toward the protective shell 240 until the lower connecting shaft 230 is completely inserted into the protective shell 240 to provide subsequent protection.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A CNC cutting tool with deflection protection, characterized in that, include: Drive rod (100), positioning assembly (200) disposed on drive rod (100) and cutter head (110) mounted on positioning assembly (200). The positioning component (200) includes a protective mechanism, a clamping mechanism disposed at the bottom of the protective mechanism, and a connecting mechanism disposed within the clamping mechanism; The protective mechanism includes an upper connecting shaft (210) fixed to the end of the drive rod (100), a rotator (220) installed in the middle of the upper connecting shaft (210), a lower connecting shaft (230) fixed below the rotator (220), and a protective shell (240) installed on the side of the upper connecting shaft (210). The connecting mechanism includes a hydraulic chamber (310) opened in the lower connecting shaft (230), a hydraulic pipe (320) connected to the end of the hydraulic chamber (310), a hydraulic pump (330) installed in the upper connecting shaft (210) and connected to the hydraulic pipe (320), a movable plate (340) embedded in the lower connecting shaft (230), a spring (350) provided on the outside of the movable plate (340), a threaded rod (360) clamped in the middle of the movable plate (340), and a threaded hole (370) opened at the end of the cutter head (110).

2. The CNC cutting tool with deflection protection according to claim 1, characterized in that, The clamping mechanism includes a diversion chamber (410) opened on the lower connecting shaft (230) and located on the side of the hydraulic chamber (310), a push plate (420) clamped at the bottom end of the diversion chamber (410), a clamping plate (430) fixed to the outer end of the push plate (420), and a pressure sensor (440) embedded in the clamping plate (430).

3. A CNC cutting tool with deflection protection according to claim 1, characterized in that, A snap-fit ​​plate (211) is installed on the side of the upper connecting shaft (210), and a snap-fit ​​groove (212) is provided on the lower connecting shaft (230) to be adapted to snap-fit ​​the snap-fit ​​plate (211).

4. A CNC cutting tool with deflection protection according to claim 1, characterized in that, The end of the threaded rod (360) is fitted with a ball (361).

5. A CNC cutting tool with deflection protection according to claim 2, characterized in that, The push plate (420) and the clamping plate (430) are provided in two sets on the same side, and the push plate (420) is connected by a connecting piece (421).

6. A CNC cutting tool with deflection protection according to claim 2, characterized in that, A hydraulic sensor (411) is installed inside the flow divider (410).

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