阅读说明：本技术 数控机床刀具冷却装置的对准控制方法 (Alignment control method of numerical control machine tool cutter cooling device ) 是由 吴继春 张军 吴晓峰 季宽权 于 2021-06-29 设计创作，主要内容包括：本发明涉及一种数控机床刀具冷却装置的对准控制方法,包括：根据刀具轨迹和刀具半径计算出刀触点位置,并将刀触点位置发送至PLC控制器；PLC控制器根据刀触点位置控制调整装置对刀具冷却装置进行两自由度姿态调整,使得刀具冷却装置的喷嘴对准刀触点。本发明有效提升了刀具冷却装置的冷却液和切削刃的对准精度、控制方便,且有效降低了冷却成本。(The invention relates to an alignment control method of a numerical control machine tool cutter cooling device, which comprises the following steps: calculating a cutter contact point position according to the cutter track and the cutter radius, and sending the cutter contact point position to a PLC (programmable logic controller); the PLC controls the adjusting device to adjust the two-degree-of-freedom posture of the cutter cooling device according to the position of the cutter contact, so that the nozzle of the cutter cooling device is aligned with the cutter contact. The invention effectively improves the alignment precision of the cooling liquid and the cutting edge of the cutter cooling device, is convenient to control, and effectively reduces the cooling cost.)

1. An alignment control method of a numerical control machine tool cutter cooling device is characterized by comprising the following steps: the method comprises the following steps:

calculating a cutter contact point position according to the cutter track and the cutter radius, and sending the cutter contact point position to a PLC (programmable logic controller);

and the PLC controls the adjusting device to perform two-degree-of-freedom posture adjustment on the cutter cooling device according to the position of the cutter contact, so that a nozzle of the cutter cooling device is aligned with the cutter contact.

2. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: the PLC controls the adjusting device to adjust the two-degree-of-freedom posture of the cutter cooling device according to the first adjusting parameter and the second adjusting parameter; the first adjusting parameter and the second adjusting parameter are obtained by calculation according to the position of the knife contact.

Defining a first connecting line of a connecting line position between a nozzle of the cutter cooling device and a cutter contact, wherein the connecting line between the cutter position of the cutter and the cutter contact is a second connecting line, and the second adjusting parameter is an included angle between the first connecting line and the second connecting line; the first adjustment parameter is a position vector between a nozzle of the tool cooling device and a tool contact.

3. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: the PLC also acquires the feeding speed and the cutting strength of the cutter in real time and adjusts the spraying strength of the cooling liquid of the cutter cooling device according to the feeding speed and the cutting strength of the cutter.

4. The alignment control method of a numerical control machine tool cutter cooling device according to claim 3, characterized in that: the method for adjusting the cooling liquid spraying strength of the tool cooling device by the PLC according to the tool feeding speed and the cutting strength comprises the following steps: and if the feeding speed and/or the cutting strength of the cutter are/is increased, the PLC controls the cutter cooling device to increase the spraying strength of the cooling liquid.

5. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: the nozzle of the cutter cooling device is connected to a swinging rod piece, the swinging rod piece is hinged to a rotating rod piece, the PLC controls the adjusting device to drive the swinging rod piece to swing relative to the rotating rod piece according to the position of the cutter contact, and controls the adjusting device to drive the rotating rod piece to rotate.

6. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: the PLC is also used for controlling the replacement of the cutter.

7. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: the PLC is also used for controlling the clamping of the product.

8. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: and the position of the knife contact is sent to the PLC in a wired transmission mode.

9. The alignment control method of a numerical control machine tool cutter cooling device according to claim 1, characterized in that: and the position of the knife contact is sent to the PLC in a wireless transmission mode.

10. The alignment control method of a numerical control machine tool cutter cooling device according to claim 9, characterized in that: the wireless transmission mode comprises Bluetooth transmission, infrared transmission or Wi-Fi wireless transmission.

Technical Field

The invention relates to the technical field of numerical control machine tools, in particular to an alignment control method of a cutter cooling device of a numerical control machine tool.

Background

The numerical control machine tool is an automatic machine tool with a program control system, and the numerical control machine tool sends out control signals to control the action of the machine tool so as to process parts. In order to improve the machining quality and the tool life, in numerical control machining, it is generally necessary to cool the machining region with a cooling device.

The existing cooling mode generally adopts the following two modes:

one is to use an external cooling mode, which needs to manually adjust a cooling device to align with a part processing area before processing is started, and the mode has low alignment precision, and usually adopts a large cooling water column to cover a large processing area in order to ensure the cooling effect, i.e. the mode is difficult to be pertinently close to the position of a cutting edge, is not beneficial to improving the processing environment, is easy to cause the waste of cooling liquid, and increases the cooling cost;

the other is an inner cooling mode which needs to be matched with an inner cooling cutter for use; the inside coolant liquid inlet opening that is connected with the lathe that is provided with of internal cooling cutter, the coolant liquid is directly linked together with the coolant liquid inlet opening of internal cooling cutter with the hose, adds man-hour, lets in the coolant liquid through the inside coolant liquid inlet opening of internal cooling cutter and realizes the cooling, but the required cooling of this mode sets up the structure complicacy, and be not convenient for control, the cooling reliability can't obtain guaranteeing, this mode and need be equipped with special cutter in addition, and is expensive.

Therefore, the existing tool cooling device cannot realize accurate alignment of the cooling liquid and the cutting edge, is inconvenient to control, has high cooling cost, and cannot meet the use requirement.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the cutter cooling device in the prior art cannot realize accurate alignment of cooling liquid and a cutting edge, is inconvenient to control and has high cooling cost.

In order to solve the technical problem, the invention provides an alignment control method of a numerical control machine tool cooling device, which comprises the following steps:

calculating a cutter contact point position according to the cutter track and the cutter radius, and sending the cutter contact point position to a PLC (programmable logic controller);

and the PLC controls the adjusting device to perform two-degree-of-freedom posture adjustment on the cutter cooling device according to the position of the cutter contact, so that a nozzle of the cutter cooling device is aligned with the cutter contact.

In one embodiment of the invention, the PLC controller controls the adjusting device to perform two-degree-of-freedom attitude adjustment on the cutter cooling device according to the first adjusting parameter and the second adjusting parameter; the first adjusting parameter and the second adjusting parameter are obtained by calculation according to the position of the knife contact.

Defining a first connecting line of a connecting line position between a nozzle of the cutter cooling device and a cutter contact, wherein the connecting line between the cutter position of the cutter and the cutter contact is a second connecting line, and the second adjusting parameter is an included angle between the first connecting line and the second connecting line; the first adjustment parameter is a position vector between a nozzle of the tool cooling device and a tool contact.

In one embodiment of the invention, the PLC also acquires the cutter feeding speed and the cutting strength in real time and adjusts the cooling liquid spraying strength of the cutter cooling device according to the cutter feeding speed and the cutting strength.

In one embodiment of the invention, the method for adjusting the cooling liquid spraying strength of the tool cooling device by the PLC according to the tool feeding speed and the cutting strength comprises the following steps: and if the feeding speed and/or the cutting strength of the cutter are/is increased, the PLC controls the cutter cooling device to increase the spraying strength of the cooling liquid.

In one embodiment of the invention, the nozzle of the tool cooling device is connected to a swinging rod member, the swinging rod member is hinged with a rotating rod member, the PLC controls the adjusting device to drive the swinging rod member to swing relative to the rotating rod member according to the position of the tool contact point, and controls the adjusting device to drive the rotating rod member to rotate.

In one embodiment of the invention, the PLC controller is also used to control the replacement of the tool.

In an embodiment of the invention, the PLC controller is further configured to control clamping of a product.

In one embodiment of the invention, the blade contact position is sent to the PLC controller by wired transmission.

In one embodiment of the invention, the blade contact position is transmitted to the PLC controller by wireless transmission.

In one embodiment of the invention, the wireless transmission mode comprises bluetooth transmission, infrared transmission or Wi-Fi wireless transmission.

Compared with the prior art, the technical scheme of the invention has the following advantages:

according to the alignment control method of the numerical control machine tool cutter cooling device, the cooling liquid can be accurately aligned to the position of the cutting edge to be sprayed and directly reach the position below the cutting chips, so that the cooling effect is greatly improved, and the waste of the cooling liquid is reduced; the whole structure is simple, the control and the adjustment are convenient, and the cooling cost is reduced.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a flow chart of an alignment control method of a tool cooling device of a numerical control machine tool according to the present invention;

FIG. 2 is a schematic view of the alignment modeling of the tool cooling apparatus of the present invention;

FIG. 3 is a schematic view of the adjustment of the cooling device for the tool of the present invention;

the specification reference numbers indicate: 1. a cutter; 2. nozzle, 3, pendulum rotating rod piece, 4, rotatory rod piece.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1, the invention discloses an alignment control method of a numerical control machine tool cooling device, comprising the following steps:

calculating a knife contact point position according to the track of the knife 1 and the radius of the knife 1, and sending the knife contact point position to a PLC (programmable logic controller);

the PLC controls the adjusting device to adjust the two-degree-of-freedom posture of the cutter cooling device according to the position of the cutter contact, so that the nozzle 2 of the cutter cooling device is aligned with the cutter contact.

Wherein the tool contact point refers to a contact point of the tool 1 and a processed product.

It can be understood that the tool path of the numerical control machine is obtained by a path interpolation method.

In one embodiment, in the process of running the numerical control machining program on the numerical control machine tool, the machining information of the current interpolation period, including data such as machining speed, actual positions and errors of various motion axes, can be acquired from an original interpolation module of the numerical control system, meanwhile, a currently executed program segment is acquired from an original interpretation module of the numerical control system, the time of starting and ending running of each program segment is recorded, and the acquisition time of each time of the machining information is also recorded, so that subsequent tracking is performed and information calling of a PLC is facilitated.

The adjusting device is a two-degree-of-freedom adjusting device.

In one embodiment, the PLC controller adjusts the parameter according to the first adjustment parameterAnd a second adjusting parameter theta controls the adjusting device to perform two-degree-of-freedom attitude adjustment on the cutter cooling device; first adjustment parameterAnd the second adjustment parameter theta is calculated according to the position of the knife contact.

As shown in fig. 2, point a in fig. 2 is a tool location point, point B is a tool contact point, a connection line between the nozzle 2 of the tool cooling device and the tool contact point B is defined as a first connection line, a connection line between the tool location point a of the tool 1 and the tool contact point B is defined as a second connection line, and the second adjustment parameter θ is an included angle between the first connection line and the second connection line; first adjustment parameterIs the position vector between the nozzle 2 of the tool cooling device and the tool contact point B, i.e. the vector in which the first connecting line is located. By calculating a first adjustment parameterThe knife contact B, the knife position A and the nozzle 2 are coplanar, and the second adjustment parameter theta is calculated to accurately adjust the position of the knife contact B, the knife position A and the nozzle 2The nozzle 2 is positioned so that the nozzle 2 is more accurately aligned with the knife contact B.

It will be understood that the tool location refers to a reference point for positioning the tool 1, and that tool alignment should be performed such that the tool location coincides with the tool location, typically the tool contact location is offset from the tool location by a tool radius.

The first adjustment parameterThe second adjustment parameter theta can be calculated by the numerical control machine tool, the calculation result is transmitted to the PLC, and the first adjustment parameter theta can also be directly carried out by the PLCAnd calculation of a second adjustment parameter theta.

In one embodiment, the PLC controller further obtains the feed speed and the cutting strength of the tool 1 in real time, and adjusts the spray strength of the cooling liquid of the nozzle 2 of the tool cooling device according to the feed speed and the cutting strength of the tool 1, which is beneficial to achieving a better cooling effect and avoiding waste of the cooling liquid.

Data exchange can be carried out between digit control machine tool and the PLC controller, and the digit control machine tool can give the PLC controller with the feed speed and the cutting strength transmission of cutter 1.

In one embodiment, the method for adjusting the spraying strength of the cooling liquid sprayed by the nozzle 2 of the cutter cooling device according to the feeding speed and the cutting strength of the cutter 1 by the PLC controller comprises the following steps: when the feed speed and/or the cutting strength of the tool 1 are/is increased, the PLC controls the tool cooling device to increase the spraying strength of the cooling liquid.

In one embodiment, as shown in fig. 3, the nozzle 2 of the tool cooling device is connected to a swing link 3, the swing link 3 and a rotation link 4 are hinged at a point C, the PLC controller controls the adjusting device to drive the swing link 3 to swing relative to the rotation link 4 according to the position of the tool contact, namely, the swing link 3 swings around the point C, and controls the adjusting device to drive the rotation link 4 to rotate around the rotation axis at the point D.

In one of the embodiments, the PLC controller is also used to control the replacement of the tool 1.

In one embodiment, the PLC controller is further configured to control the clamping of the product.

In one embodiment, the blade contact position is transmitted to the PLC controller by wired transmission, or the blade contact position is transmitted to the PLC controller by wireless transmission.

In one embodiment, the wireless transmission means comprises Bluetooth transmission, infrared transmission or Wi-Fi wireless transmission.

In one embodiment, the PLC controller operates in a cyclic scanning manner to obtain information on the operation state of the tool, such as the feeding speed and cutting speed of the tool, in real time.

According to the alignment control method of the numerical control machine tool cooling device, the position of the tool contact is used as the nozzle alignment reference of the tool cooling device, so that the alignment precision is improved, in addition, the PLC is used for controlling the adjusting device to perform two-degree-of-freedom motion to realize two-degree-of-freedom posture adjustment of the tool cooling device, so that the different directions of the cooling liquid nozzle are adjusted, the cooling liquid nozzle can be better ensured to be accurately aligned with the tool contact, the cooling liquid can be accurately aligned with the position of the cutting edge to be sprayed and directly reach the position below chips, and the cooling liquid is accurately cooled from the position below a machining area; the processing quality and the service life of the cutter are greatly improved; the online real-time adjustment of the cooling device can be realized, and the product processing does not need to be stopped in the adjustment process, so that the numerical control processing efficiency is better ensured; the PLC controller is used for transmitting data, and a new sensor is not needed for feeding back the data, so that the PLC controller is convenient to control and install and is beneficial to saving cost; the whole structure is simple, the control and the adjustment are convenient, the processing and the use cost are low, and the popularization and the application are facilitated.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.