TWM548605U - Chatter monitoring system for machine tool - Google Patents

Description

Tool machine flutter monitoring system

This creative department is related to the machine tool; in particular, it refers to a machine tool flutter monitoring system with debugging function.

Existing machining center machines, such as vertical machining center machines, generally include a machine, a spindle and an automatic tool change system. The workpiece of the machine is clamped to the workpiece to be processed; a part of the spindle can be controlled to rotate at a high speed, and the bottom end of the component is provided with a cutting tool, such as a milling cutter, a drill bit, etc.; The system is adjacent to the spindle, which provides a quick change of the machining tool through the tool change mechanism.

However, during the cutting process, chatter is often generated during high-speed or high-horsepower cutting, or when the depth of cut exceeds a critical value, flutter will occur, which will affect production efficiency.

The high-speed rotating component of the spindle of the existing vertical machining center machine is driven by the driving motor to drive the belt, and more specifically, the tooth row formed through the inner surface of the belt meshes with the tooth portion of the component. And for the transmission. In addition, the belt shoulder has the function of rotating the member in position so that the tool change arm of the tool change mechanism can smoothly grasp the tool disposed at the bottom end of the member. However, in practice, whether the high-speed rotating component of the spindle can be brought to the position by the belt is affected by the arrangement relationship between the tooth row and the tooth portion, that is, if the belt is caused by the tooth row and the tooth portion When the misalignment of the meshing teeth occurs, the fastening part of the tool set at the bottom end of the component cannot be rotated into position, so that the tool changer cannot smoothly buckle the knife; secondly, if the belt breaks due to aging, it makes The fastening part of the tool cannot be turned into position. The foregoing situation cannot be detected in time in the existing vertical machining center machine, and the tool changer still suffers from improperly taking the knife due to the control of the system, which increases the trouble.

In view of this, the purpose of this creation is to provide a machine tool flutter monitoring system, which has the function of timely debugging to prevent the occurrence of wrong actions.

In order to achieve the above object, the machine tool flutter monitoring system provided by the present invention comprises a spindle base, a spindle, a driving unit and a monitoring unit. The spindle includes a machining shaft head rotatably disposed in the spindle base; the driving unit is disposed on the spindle base to drive the machining shaft to rotate; the monitoring unit includes an induction base point, a first detector and a second detector, wherein the sensing base is disposed on the machining shaft, and the first detector and the second detector are disposed on the spindle base, wherein the first The detector is configured to detect the sensing base point located at a first location, and the second detector is configured to detect the sensing base point located at a second location.

In an embodiment, the system further includes a controller and a tool change mechanism, wherein the controller is electrically connected to the second detector and the tool change mechanism, and when the second detector does not detect the When the base point is sensed, the controller controls the tool change mechanism to stop.

The effect of the creation is whether the sensing point of the machining shaft head can be detected by the second detector to determine whether the rotation angle of the machining shaft head is true.

In order to explain the present invention more clearly, a preferred embodiment will be described in detail with reference to the drawings. Please refer to FIG. 1 to FIG. 4 , which is a machine tool flutter monitoring system according to a preferred embodiment of the present invention. The tool machine is mainly used for cutting processing, and can be a vertical or horizontal machining center machine, or other machine. Type processing equipment. In this embodiment, a vertical machining center machine is taken as an example, which includes a spindle base 10, a tool change mechanism 20, a spindle 30, a drive unit 40, a monitoring unit 50, and a controller 60.

The spindle base 10 is a part of the machine tool and is coupled to the main body 12 constituting the trunk of the work implement, and the spindle base 10 is controllable to move up and down along the guide rail 12a on the front side of the main body 12.

The tool change mechanism 20 is disposed at one side of the spindle base 10 and includes a tool magazine 22, a first motor 24 and a tool change arm 26. The tool magazine 22 accommodates a plurality of tools, and the first motor 24 is used to drive the tool change arm 26 to rotate, and the tool change arm 26 is used for gripping the tool to perform a tool change operation.

The spindle 30 includes a machining shaft head 32 that is rotatably mounted in a longitudinal shaft bore (not shown) of the spindle base 10. The bottom of the machining shaft head 32 can be connected to a machining tool such as a milling cutter, a drill bit or the like. For the purpose of cutting, the top of the machining shaft head 32 has an annular tooth portion 32a.

The driving unit 40 is disposed on the spindle base 10 for driving the machining shaft 32 to rotate. In this embodiment, the driving unit 40 includes a second motor 42 and a transmission member 44. The second motor 42 has a rotatable output shaft 42a. One end of the output shaft 42a is coupled to a gear 46. The transmission member 44 A belt having a plurality of rods (not shown) is formed on the inner surface, and the transmission member 44 bypasses the gear 46 and the tooth portion 32a of the machining shaft head 32 through the rod tooth, and transmits the rod and the gear 46 and the tooth portion. The arrangement relationship of the convex teeth of the 32a is such that when the second motor 42 is activated to drive the output shaft 42a to rotate, the machining shaft 44 is rotated by the transmission member 44 to drive the cutter to perform cutting.

The monitoring unit 50 includes a sensing base 52, a first detector 54 and a second detector 56. The sensing point 52 is disposed on the processing head 32. The first detector 54 and the second detector 56 are disposed on the spindle base 10. In this embodiment, the first detector 54 is The second detector 56 is fixedly coupled to the spindle base 10 through a shutter 14 , and has the effect of convenient installation and maintenance. Of course, the first detector 54 and the second detector 56 are not excluded. It is directly coupled with the main body of the spindle base 10, in short, as long as the position of the first detector 54 and the second detector 56 after mounting can be fixed.

The controller 60 is electrically connected to the first detector 54, the second detector 56, and the first motor 24 of the tool change mechanism 20. The controller 60 has a function of receiving a detection signal from the detector. And a function of controlling the operation of the first motor 24 according to the received signal.

The first detector 54 of the monitoring unit 50 is configured to detect the sensing base point 52 located at a first position P1, as shown in FIG. The first position P1 is the returning position of the machining shaft head 32 after the machine tool is started. As shown in FIG. 5, the second detector 56 of the monitoring unit 50 is configured to detect the second position P2. The sensing base point 52 is a specific position after the machining shaft head 32 is rotated by a predetermined angle with respect to the first position P1, so as to enable the fastening portion of the cutter to be rotated to be positioned so that the tool change arm 26 can be smoothly buckled. Knife.

Please refer to FIG. 6 again, the second detector 56 in the normal state should accurately detect the sensing base point 52 located in the second position P2. However, when the second detector 56 fails to detect the When the sensing base 52 sends an error detection signal, the controller 60 will control the first motor 24 to stop according to the received error detection signal, so that the tool change arm 26 stops the knife action, thereby avoiding the possibility of improper operation. Missing such as collision or failure to take a knife. The detection signal is generated because the sensing base 52 fails to stop at the second position P2, causing the second detector 56 to be insensitive thereto, and the reasons for the foregoing include, but are not limited to, the transmission member 44. The (belt) aging fracture, the roding of the transmission member 44 and the convex teeth of the tooth portion 32a of the machining shaft head 32 are caused by misalignment.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present application and the scope of the patent application are intended to be included in the scope of the present patent.

[This creation]
100‧‧‧Tool machine flutter monitoring system
10‧‧‧ spindle base
12‧‧‧Host body
12a‧‧‧rail
14‧‧‧ ‧
20‧‧‧Tool changer
22‧‧‧Tools
24‧‧‧First motor
26‧‧‧Change arm
30‧‧‧ Spindle
32‧‧‧Machining shaft head
32a‧‧‧ teeth
40‧‧‧ drive unit
42‧‧‧second motor
42a‧‧‧ Output shaft
44‧‧‧ Transmission parts
46‧‧‧ Gears
50‧‧‧Monitoring unit
52‧‧‧Acceptance point
54‧‧‧First detector
56‧‧‧Second detector
60‧‧‧ Controller

Figure 2 is a perspective view of a portion of the structure of Figure 1; Figure 3 is a perspective view of the structure of Figure 1; Figure 4 is a cross-sectional view of the direction of Figure 4-4, showing the first A detector corresponds to the sensing base point of the first position; FIG. 5 is similar to FIG. 4, and discloses that the second detector corresponds to the sensing base point of the second position; FIG. 6 is similar to FIG. 4, and the second detector fails to correspond to Sensing base point.

14‧‧‧ ‧

24‧‧‧First motor

32a‧‧‧ teeth

44‧‧‧ Transmission parts

46‧‧‧ Gears

50‧‧‧Monitoring unit

52‧‧‧Acceptance point

54‧‧‧First detector

56‧‧‧Second detector

60‧‧‧ Controller

Claims (5)

A machine tool flutter monitoring system includes: a spindle base; a spindle including a machining shaft head rotatably disposed in the spindle base; a driving unit disposed on the spindle base The monitoring unit includes a sensing base point, a first detector and a second detector, wherein the sensing base is disposed on the processing shaft, the first detector and the The second detector is disposed on the spindle base, wherein the first detector is configured to detect the sensing base point in a first position, and the second detector is configured to detect the sensing position in a second position base point. The machine tool flutter monitoring system of claim 1, comprising a controller and a tool change mechanism, the controller electrically connecting the second detector and the tool change mechanism; wherein the second detector When the sensing base point is not detected, the controller controls the tool change mechanism to stop. The machine tool flutter monitoring system of claim 2, wherein the tool change mechanism comprises a first motor and a tool change arm, the first motor is electrically connected to the controller, and is configured to drive the tool change arm to rotate . The machine tool flutter monitoring system of claim 1 or 2, wherein the driving unit comprises a second motor and a transmission member, the second motor has a rotatable output shaft, and the output shaft is driven by the transmission member The machining shaft head rotates. The machine tool flutter monitoring system of claim 4, wherein one end of the output shaft is coupled to a gear, the machining shaft head has a tooth portion, the transmission member is a belt, and the inner surface of the belt is formed with a plurality of rod teeth. Gear and the tooth.