CN210024588U

CN210024588U - Cutter head rotation detection device and numerically controlled lathe

Info

Publication number: CN210024588U
Application number: CN201920881696.1U
Authority: CN
Inventors: 郑新胜; 韩涛; 周勇
Original assignee: Shenzhen Tuo Zhi Technology Co Ltd
Current assignee: Shenzhen Tuo Zhi Technology Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-02-07
Anticipated expiration: 2029-06-12

Abstract

A cutter head rotation detection device and a numerical control lathe comprise a tool magazine support (11), a cutter head (12), a rotating mechanism (13), a detection mechanism (14) and a controller (15), wherein the detection mechanism (14) comprises two or more counting switches, each counting switch is matched with a rotating shaft of the rotating mechanism (13), and the counting switches are triggered to count for one time after the rotating shafts rotate for a first angle; the controller (15) is respectively connected with two or more counting switches of the detection mechanism (14) and is used for acquiring the counting times of each counting switch and generating an alarm when the counting times of each counting switch are inconsistent. Because two or more counting switches are arranged for the detection mechanism, the counting switches can count simultaneously, the situation that a single counting switch causes tool disorder of a tool magazine after counting errors can be effectively avoided, and the accuracy of the tool changing process is improved.

Description

Cutter head rotation detection device and numerically controlled lathe

Technical Field

The invention relates to the technical field of data lathes, in particular to a cutter head rotation detection device and a numerical control lathe.

Background

Currently, a numerically controlled lathe is often provided with a tool magazine and an automatic tool changing mechanism, and a typical lathe is provided with a boring and milling machining center and a turning machining center. In the numerical control machining center, after a part to be machined is clamped and positioned once, the plurality of cutters on the cutter head can be used for centralized continuous machining of a plurality of processes, so that the number of lathes is greatly reduced. The automatic tool changer is an important actuating mechanism of a numerical control machine tool, has various forms, and is a common automatic tool changing system with rotary tool rests for tool changing, row type tool rests for tool changing, spindle head changing and tool magazines at present. In the actual machining process, the automatic tool changing device can help a numerical control machine tool to save auxiliary time and meet the requirement of finishing multiple processes and multiple steps in one-time installation.

In the tool changing process of the numerical control machining center, after the controller finds the target tool number, a tool disc rotating instruction is sent, a tool disc in the tool magazine can rotate in the nearest mode, each tool position is rotated by the tool disc, a signal can be sent back to the controller, and the controller records the current tool disc position in time. In some cases, due to reasons such as misoperation or signal acquisition failure, the feedback signal of the cutter position may be calculated less or more, and the problem of wrong recording of the cutter position occurs, which causes cutter disordering of the tool magazine, is not favorable for subsequent tool changing operation, and delays the processing progress of the part.

For example, in a vertical machining center, the position control of the cutterhead in the tool magazine occupies a very important link in the whole control system. Due to the complex structure of the cutter head in the cutter base and the high requirement on signal control precision, the situations of cutter positioning error and cutter disordering can occur in the use process, even the counting error of the cutter base can be caused, if a user continues to use the lathe without attention, the cutter adjustment error can be caused, and parts for machining can be damaged in serious cases.

Disclosure of Invention

The invention mainly solves the technical problem of how to avoid the situation of cutter disorder possibly occurring in the existing numerical control machining center. In order to solve the technical problem, the application discloses a cutter head rotation detection device and a numerical control lathe.

According to a first aspect, an embodiment of the present application provides a cutter head rotation detection device, including:

a tool magazine holder 11;

the cutter head 12 is movably arranged on one side surface of the tool magazine bracket 11, a plurality of tool sleeves which are annularly arranged are arranged on the cutter head 12, and each tool sleeve is used for clamping a tool;

the rotating mechanism 13 is fixedly arranged on the opposite side surface of the tool magazine bracket 11 and is connected with the cutter disc 12 through a rotating shaft, and the rotating shaft enables the cutter disc 12 to move by a tool sleeve position after rotating by a first angle;

the detection mechanism 14 comprises two or more counting switches, each counting switch is matched with the rotating shaft of the rotating mechanism 13, and the counting switches are triggered to count for one time after the rotating shafts rotate for a first angle;

and a controller 15, connected to two or more counting switches of the detection mechanism 14, for acquiring the counting times of each counting switch, and generating an alarm when the counting times of each counting switch are inconsistent.

The rotating shaft of the rotating mechanism 13 has two opposite end portions, one of the end portions extends to the cutter head 12 to drive the cutter head 12 to rotate, and the other end portion extends to the detecting mechanism 14 to be matched with the counting switch.

The detection mechanism 14 further comprises an induction block, the center of the induction block is fixed on the other end part of the rotating shaft, and two contact parts with the same center distance are formed at the two ends; two or more counting switches of the detection mechanism 14 are arranged in parallel at the contact part position of the induction block, and are used for enabling any one of the two contact parts to be in contact with the counting switch once after the induction block rotates by the first angle; the first angle is 180 degrees or 360 degrees.

The counting switch is used for generating a primary counting signal when being contacted with the contact part of the induction block; the controller 15 is configured to receive the counting signal generated by each counting switch, and record the counting signal generated by the counting switch through a ring counter.

The cutter head rotation detection device also comprises a cutter changing cam mechanism 16 and a cutter changing arm 17; the tool changing cam mechanism 16 is arranged on the opposite side surface of the tool magazine bracket 11, the tool changing arm 17 is fixed on the output shaft of the tool changing cam mechanism 16 and extends to a tool sleeve position of the cutter disc 12; the tool changing arm 17 is used for rotating along with an output shaft of the tool changing cam mechanism 16, and a tool is grabbed from the cutter disc 12 when the tool changing arm 17 rotates to the cutter disc 12.

The center of the tool changing arm 17 is fixed on the output shaft of the tool changing cam mechanism 16, and two tool changing parts with the same center distance are formed at two ends; the tool changing arm 17 is used for grabbing a tool from the cutter disc 12 after rotating for a second angle, and the second angle is 180 degrees or 360 degrees.

The controller 15 is also connected with the rotating mechanism 13 and/or the tool changing cam mechanism 16 and is used for controlling the rotating mechanism 13 and/or the tool changing cam mechanism 16 to pause working when an alarm is generated by the controller.

The cutter head rotation detection device further comprises a cutter library protective cover 18 which is fixed on one side surface of the cutter library support 12 and covers the outside of the cutter head 12 and is used for protecting the cutter head 12.

The surface of the tool magazine protective cover 18 is provided with a detachable cover body 181, and the cover body 181 is used for facilitating the user to overhaul the cutter head 12 after detachment.

According to a second aspect, an embodiment of the present application provides a numerically controlled lathe, including:

the processing platform is used for placing a part to be processed;

the cutter head rotation detection device according to the first aspect is configured to cooperate with the machining platform to perform machining operation on a part to be machined.

The beneficial effect of this application is:

according to the cutter head rotation detection device and the numerical control lathe of the embodiment, the cutter head rotation detection device comprises a tool magazine support 11, a cutter head 12, a rotating mechanism 13, a detection mechanism 14 and a controller 15, wherein the detection mechanism 14 comprises two or more counting switches, each counting switch is matched with a rotating shaft of the rotating mechanism 13, and the counting switches are triggered to count for one time after the rotating shafts rotate for a first angle; the controller 15 is connected to two or more counting switches of the detection mechanism 14, respectively, and is configured to obtain the counting times of each counting switch, and generate an alarm when the counting times of each counting switch are inconsistent. On the first hand, because two or more counting switches are arranged for the detection mechanism, the counting switches can count simultaneously, the situation that a tool magazine is in disorder after a single counting switch counts wrongly can be effectively avoided, and the accuracy of the tool changing process is improved; in the second aspect, the plurality of counting switches are matched with the rotating shaft of the rotating mechanism to detect the rotating position of the cutter head, so that the triggering action of the counting switches can be well kept consistent with the cutter position of the cutter head, and the counting switches can count once when the cutter head rotates for one cutter position; in the third aspect, the controller is connected with each counting switch and is also connected with the rotating mechanism and the tool changing cam mechanism, so that the controller can not only give an alarm when the counting times of each counting switch are inconsistent, but also can timely control the rotating mechanism and the tool changing cam mechanism to pause operation, can prevent the tool changing operation of the lathe after the condition of tool disorder occurs, and is beneficial to bringing safety operation guarantee for the numerical control lathe.

Drawings

FIG. 1 is an exploded view of a cutter head rotation detecting device according to an embodiment;

FIG. 2 is a schematic perspective view of a cutter head rotation detecting device according to an embodiment;

FIG. 3 is an assembly schematic of a rotation mechanism and a detection mechanism;

FIG. 4 is a schematic structural diagram of a numerically controlled lathe according to an embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The first embodiment,

Referring to fig. 1 and 2, the present application provides a cutter head rotation detection device, which mainly includes a tool magazine holder 11, a cutter head 12, a rotation mechanism 13, a detection mechanism 14, and a controller 15. The following are described separately.

The tool magazine holder 11 is the main support member of the cutter head rotation detecting device, and at least two opposite side surfaces are formed thereon so that other members can be fitted on the two side surfaces.

The cutter head 12 is movably arranged on one side surface of the tool magazine support 11, a plurality of tool pockets which are annularly arranged are arranged on the cutter head 12, and each tool pocket is used for clamping a tool. In this embodiment, the tool holders (for example, reference numeral 121) on the cutter head 12 have a uniform structure, are connected in series and are distributed in a circular shape on the side surface of the tool magazine support 11, and one end of each tool holder has a clamping portion for clamping a tool shank of a tool, so that a plurality of different tools can be mounted on the tool holders, thereby forming a tool magazine with a large number of tools and a plurality of types of tools. The tool herein refers to a turning tool for machining, and different tools have different applications and are used for operations such as cutting, drilling, polishing, and grinding of a part to be machined.

The rotating mechanism 13 is fixedly arranged on the opposite side surface of the tool magazine support 11 and is connected with the cutter head 12 through a rotating shaft, and the rotating shaft enables the cutter head 12 to move by a position of a cutter sleeve after rotating by a first angle. In this embodiment, see fig. 3, the rotating mechanism 13 may include a motor 131, a gear box at the end of the motor, and a rotating shaft on the gear box, and the motor 131 drives the rotating shaft to rotate through the gear box.

The detection mechanism 14 includes two or more counting switches (e.g., reference numerals 142 and 143 in fig. 3), each of which is engaged with the rotating shaft of the rotating mechanism 13 and is triggered to count once after the rotating shaft rotates by a first angle.

The controller 15 is connected to two or more counting switches of the detection mechanism 14, respectively, and is configured to obtain the counting times of each counting switch, and generate an alarm when the counting times of each counting switch are inconsistent.

Further, as seen in fig. 3, the shaft of the rotary mechanism 13 has two opposite ends, one end 132 extending to the cutter head 12 for driving the cutter head 12 to rotate, and the other end 133 extending to the detection mechanism 14 for cooperating with the counting switches (e.g., 142, 143).

Further, the detecting mechanism 14 further includes a sensing block 141, the center of which is fixed on the other end 133 of the rotating shaft, and two contact portions 1411, 1412 with a concentric distance are formed at both ends; two or more counting switches (e.g., 142, 143) of the detection mechanism 14 are disposed in parallel at the contact portion positions (e.g., 1411, 1412) of the sensing block 141, and are configured to make any one of the two contact portions (e.g., 1411, 1412) contact with the counting switch once after the sensing block 141 rotates by a first angle. The first angle in this embodiment is 180 degrees or 360 degrees.

In another embodiment, the counting switches 142 and 143 are respectively disposed at the positions of the contact portions 1411 and 1422, so that the counting switches are separated from each other, thereby avoiding signal interference and enhancing the reliability of contact.

In another embodiment, the detecting mechanism 14 does not include the sensing block 141, but a protrusion (the protrusion is used to implement the function of the contact portion 1411 or 1412) integrated with the rotating shaft is formed on the other end 133 of the rotating shaft of the rotating mechanism 13, so that the installation positions of a plurality of counting switches (e.g., 1411, 1412) are close to the end 133, that is, the same contact effect as the sensing block 141 is achieved, and a component of the sensing block 141 is also saved.

In this embodiment, two or more count switches (e.g., 142, 143) may be secured to the mounting plate 134 by nuts, see fig. 3, and the mounting plate 134 is secured to the rotary mechanism 13. Therefore, the switch parts of the counting switches can be contacted with the contact part (such as 1411 or 1412) of the sensing block 141, and the relative position of the counting switches and the sensing block 141 can be kept unchanged.

In the present embodiment, the number of the count switches is preferably two. Of course, the number of the counting switches may be more than two, which is not limited herein.

It should be noted that each counting switch (e.g. 142) is used for generating a counting signal when contacting with the contact portion (e.g. 1411) of the sensing block 141; the controller 15 is used for receiving the counting signal generated by each counting switch, and recording the counting signal generated by the counting switch through a ring counter. Each counting switch corresponds to one ring counter, and under the normal condition, the counting values of the ring counters are equal. The ring counter may be a counting chip or a logic module inside the controller 15, and has a counting range with the same number of tool sleeves as that in the tool pan 12, and counts in cycles, and the structure and principle of the ring counter are not specifically limited herein.

Referring to fig. 1 and 2, the cutter head rotation detecting device claimed in the present application further includes a cutter changing cam mechanism 16 and a cutter changing arm 17. The tool changing cam mechanism 16 comprises a motor 161, a gear box at the tail end of the motor and an output shaft 162 on the gear box, wherein the motor 161 drives the output shaft 162 to rotate through the gear box. In addition, the tool changing cam mechanism 16 is disposed on the opposite side of the magazine holder 11, and the tool changing arm 17 is fixed to the output shaft 162 of the tool changing cam mechanism 16 and extends to a tool pocket position of the cutter head 12. The tool changing arm 17 is configured to rotate with the output shaft 162 of the tool changing cam mechanism 16, and to grasp a tool from the cutter head 12 when the tool changing arm 17 rotates to the cutter head 12.

Further, the center of the tool changing arm 17 is fixed to the output shaft 162 of the tool changing cam mechanism 16, and two tool changing portions (e.g., 171 and 172) having a concentric distance are formed at both ends, and the

tool changing portions

171 and 172 have grooves for catching the tool shanks of the tools, so that the tools in the tool holders can be caught from any one of the tool holders. The tool changing arm 17 is used to grasp a tool from the tool head 12 after each rotation through a second angle, here 180 degrees or 360 degrees.

Further, as shown in fig. 2, the controller 15 is also connected to the rotating mechanism 13 and/or the tool changing cam mechanism 16 for controlling the rotating mechanism 13 and/or the tool changing cam mechanism 16 to halt operation when an alarm is generated by itself, such as the motor 131 of the controller rotating mechanism 13, and the motor 161 of the tool changing cam mechanism 16 is powered off. It should be noted that the counting logic, the judging logic and the control logic in the controller 15 are all simple, and the existing control technology can be adopted, so that the functional logics are not limited and protected here.

Further, referring to fig. 1 and 2, the cutter head rotation detecting apparatus claimed in the present application further includes a tool magazine shield 18 fixed to one side surface of the tool magazine holder 12 and covering an outside of the cutter head 12 for shielding the cutter head 12. Preferably, the tool magazine protection cover 18 is made of sheet metal materials, has the characteristics of firmness and durability, and can effectively prevent processing waste from entering the interior of the tool magazine.

Further, the surface of the tool magazine guard 18 is provided with a detachable cover 181, and the cover 181 is used to facilitate the user to inspect the cutter head 12 after the detachment. The cutter head 12 can be exposed by removing the cover 181, and at this time, the user is allowed to perform operations such as cutter replacement, cutter inspection, cutter position correction, or machine maintenance on the cutter head 12.

For the clear understanding of the structure of the cutter head rotation detecting device in the present embodiment, the operation principle of the cutter head rotation detecting device will be briefly described with reference to fig. 1, 2 and 3.

When the device needs to perform a tool changing operation, the controller 15 controls the motor 131 of the rotating mechanism 13 to be powered on, the cutter disc 12 is driven to rotate through the rotating shaft 131, when the rotating shaft 131 rotates 180 degrees, the cutter disc 12 moves to a cutter sleeve position, meanwhile, the rotating shaft 133 drives the sensing block 141 to rotate 180 degrees, and a sensing part (such as 1411 or 1412) on the sensing block 141 contacts with the counting switches (such as 142 and 143), so that each counting switch is triggered to generate a counting signal. After the controller 15 receives the counting signals of each counting switch, the counting signals are recorded in the corresponding annular counters, then the controller 15 compares whether the numerical values in the annular counters are equal, if so, the tool magazine does not have the cutter disordering, otherwise, the tool magazine is indicated to have the cutter disordering condition. When the controller 15 judges that the numerical values in the annular counters are consistent, namely when no tool is disturbed in the tool magazine, the cutter head 12 can be continuously controlled to rotate to the position of the next tool sleeve until the preset tool sleeve reaches the position where the tool changing arm can grab; the controller 15 controls the motor 161 of the tool changing cam mechanism 16 to be energized, and drives the tool changing arm 17 to grasp a tool in a predetermined tool pocket through the output shaft 162. When the controller 15 judges that the numerical values in the annular counters are inconsistent, namely, when a knife disordering condition occurs, an alarm is immediately generated, and the alarm can be in the form of voice prompt, indicator light prompt, display screen text prompt and the like. After the controller 15 generates an alarm, the controller 15 can also control the rotating mechanism 13 and the tool changing cam mechanism 16 to pause and stop electrifying so that a worker can overhaul the tool magazine.

Example II,

According to a second aspect, please refer to fig. 4, the present application provides a numerically controlled lathe, which includes a machining platform 21 and a cutter head rotation detection device disclosed in the first embodiment.

The machining platform 21 is used for placing a part 22 to be machined.

The cutter head rotation detection device is used for being matched with the processing platform 21 to process the part to be processed.

The numerical control lathe has the advantages that the numerical control lathe has the function of flexible tool changing and the function of cutter rotation detection due to the adoption of the cutter rotation detection device disclosed in the first embodiment, the moving position of the cutter is subjected to multiple detection and verification through two or more counting switches, the moving position of the cutter can be ensured to be accurate to the greatest extent, and the condition that tools are disorderly in a tool magazine can be avoided as much as possible.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A cutter head rotation detecting device, comprising:

a tool magazine holder (11);

the cutter head (12) is movably arranged on one side surface of the tool magazine support (11), a plurality of tool sleeves which are annularly arranged are arranged on the cutter head (12), and each tool sleeve is used for clamping a tool;

the rotating mechanism (13) is fixedly arranged on the opposite side surface of the tool magazine bracket (11) and is connected with the cutter head (12) through a rotating shaft, and the cutter head (12) moves by a tool sleeve position after the rotating shaft rotates by a first angle;

the detection mechanism (14) comprises two or more counting switches, each counting switch is matched with the rotating shaft of the rotating mechanism (13), and the counting switches are triggered to count for one time after the rotating shafts rotate for a first angle;

and the controller (15) is respectively connected with two or more counting switches of the detection mechanism (14) and is used for acquiring the counting times of each counting switch and generating an alarm when the counting times of each counting switch are inconsistent.

2. A cutterhead rotation sensing device as claimed in claim 1, wherein the axis of rotation of said rotary mechanism (13) has two opposite ends, one of which extends to said cutterhead (12) to drive said cutterhead (12) in rotation and the other of which extends to said sensing mechanism (14) to cooperate with said counter switch.

3. A cutter head rotation detecting device according to claim 2, wherein said detecting mechanism (14) further comprises a sensing piece having a center fixed to the other end of said rotary shaft and having two contact portions at the same center distance at both ends;

two or more counting switches of the detection mechanism (14) are arranged at the contact part positions of the induction block in parallel and used for enabling any one of the two contact parts to be in contact with the counting switch once after the induction block rotates by the first angle; the first angle is 180 degrees or 360 degrees.

4. The apparatus of claim 3, wherein said counter switch is adapted to generate a counter signal when in contact with the contact portion of said sensor block; the controller (15) is used for receiving the counting signals generated by each counting switch and recording the counting signals generated by the counting switches through a ring counter.

5. A cutterhead rotation sensing device according to any of claims 1-4, further including a cutter changing cam mechanism (16) and a cutter changing arm (17);

the tool changing cam mechanism (16) is arranged on the opposite side surface of the tool magazine support (11), the tool changing arm (17) is fixed on an output shaft of the tool changing cam mechanism (16) and extends to a tool sleeve position of the cutter head (12);

tool changing arm (17) are used for along with the output shaft of tool changing cam mechanism (16) rotates tool changing arm (17) rotate extremely follow when blade disc (12) snatch a cutter in blade disc (12).

6. The cutter head rotation detecting device according to claim 5, wherein the center of the cutter changing arm (17) is fixed to the output shaft of the cutter changing cam mechanism (16), and two cutter changing portions having the same center distance are formed at both ends;

the tool changing arm (17) is used for grabbing a tool from the cutter head (12) after rotating by a second angle, and the second angle is 180 degrees or 360 degrees.

7. A cutterhead rotation detecting arrangement according to claim 6, wherein the controller (15) is further connected to the rotating mechanism (13) and/or the tool changing cam mechanism (16) for controlling the rotating mechanism (13) and/or the tool changing cam mechanism (16) to halt operation when an alarm is generated by itself.

8. The cutter head rotation detecting device according to any one of claims 1 to 4, further comprising a tool magazine shield (18) fixed to one side surface of said tool magazine holder (11) and covering an outside of said cutter head (12) for shielding said cutter head (12).

9. The cutter head rotation detecting device according to claim 8, wherein a detachable cover (181) is provided to a surface of the magazine shield (18), the cover (181) being provided to facilitate a user's access to the cutter head (12) after the detachment.

10. A numerically controlled lathe, comprising:

a machining platform (21) for placing a part (22) to be machined;

a cutterhead rotation sensing device as claimed in any one of claims 1-9, for cooperating with the machining platform (21) for performing machining operations on a part (22) to be machined.