KR102565089B1 - Universal head unit for machine tools with anti-backlash function - Google Patents

Abstract

The present invention is coupled to the ram assembly, the main shaft is rotatably coupled therein, and the main drive unit configured with the main sensor member for detecting the rotation angle of the upper head in the front part; an upper head coupled to a front part of the main drive unit, having a sub shaft connected to the main shaft, and having a sub sensor member configured therein to detect a rotation angle of the lower head; a lower head having a spindle connected to the sub shaft to be rotatably coupled to the upper head; The present invention relates to a universal head unit for a machine tool having an anti-backlash function including a control unit configured to control rotation of the main shaft by receiving rotation angle information of an upper head and a lower head from the main sensor member and the sub sensor member.

Description

Universal head unit for machine tools with anti-backlash function}

The present invention relates to a universal head unit for a machine tool equipped with an anti-backlash function. More specifically, it relates to a universal head unit for machine tools equipped with a backlash prevention function that prevents backlash that occurs when a tool for processing a workpiece is adjusted at various angles so that the angle of a spindle can be more precisely adjusted. .

Machine tools including, for example, turning centers, machining centers, Swiss turns, electrical discharge machines, boring machines, or CNC lathes refer to machines for processing workpieces. It cuts, cuts, or grinds workpieces using tools such as milling cutters, bits, or drills.

Accordingly, machine tools are equipped with and operated with universal head units for processing workpieces into various shapes in various spaces and angles.

The universal head unit for a machine tool is a kind of tool mount on which a tool is mounted, and is mounted on a machine tool using an attachment including a saddle. movement is possible

For example, Korean Patent Registration No. 10-1237779 discloses a support 10 having a shaft 11 installed therein; an upper head 20 rotatably mounted on the support 10 about a first axis; a lower head 30 rotatably mounted to the upper head 20 about a second axis; a spindle 40 installed inside the lower head 30 and rotated about a third axis by power transmission of the shaft 11; a first movable unit (61, 62) which rotates the upper head (20) about a first axis according to the rotational drive of the shaft (11); and a second movable unit (71) for rotating the lower head (30) about the second shaft according to the rotational drive of the shaft (11). there is a bar

However, the above-described swinging head for a machine tool according to the prior art is installed between the support 10 and the upper head 20, and the upper head 20 rotates according to the linear movement of the upper head 20. is installed between the first coupling 81 and the upper head 20 and the lower head 30, which restrain or release the lower head 30 according to the linear movement of the lower head 30 A second coupling 82 for restraining or releasing the rotation of is further configured, which is that the first and second couplings 81 and 82 are configured by the gear structure of the upper head 20 and the lower head 30 It is designed to limit the rotation of the upper head 20 and the lower head 30 as they are meshed or disengaged, so when the gears meshing with them are worn out due to their repeated meshing, backlash occurs to precisely adjust the angle of the spindle. It cannot be adjusted properly, resulting in a decrease in the machining precision of the workpiece.

In addition, the upper head 20 and the lower head 30 are pushed by the first and second movable units to release the engagement state with the first and second couplings 81 and 82, thereby adjusting the angle of the spindle 40. There is also a problem that the cycle time according to this is long and the operation rate of expensive equipment is reduced.

Republic of Korea Patent No. 10-1237779

In order to solve this problem, the present invention has been made based on the above background art, to prevent backlash that occurs when a tool for processing a workpiece is adjusted at various angles so that the angle of the spindle can be more precisely adjusted Its purpose is to provide a universal head unit for machine tools equipped with an anti-backlash function.

Another object of the present invention is to provide a universal head unit for a machine tool that is easy to adjust the angle so that the spindle does not shake by clamping the main shaft and the intermediate shaft by the first and second brake modules when processing the workpiece by rotating the spindle. there is.

In order to solve this problem, the present invention has been made by the above-mentioned background art, and according to one embodiment of the present invention, the ram assembly is coupled, the main shaft is rotatably coupled to the inside, and the upper part of the front part a main driving unit configured with a main sensor member for detecting a rotation angle of the head; an upper head coupled to a front part of the main drive unit, having a sub shaft connected to the main shaft, and having a sub sensor member configured therein to detect a rotation angle of the lower head; a lower head having a spindle connected to the sub shaft to be rotatably coupled to the upper head; and a controller configured to control the rotation of the main shaft by receiving rotation angle information of the upper head and the lower head from the main sensor member and the sub sensor member.

According to one embodiment of the present invention, the main shaft and the sub-shaft are respectively mounted on outer circumferential surfaces, and the angle of the spindle is adjusted by reducing the backlash of the main shaft and the sub-shaft while moving in an axial direction under the control of the control unit. It is characterized in that it further includes; a backlash preventing member configured to be precisely adjusted.

According to one embodiment of the present invention, the main driving unit includes an outer main driving body coupled to the ram assembly and the upper head; an inner main drive body coupled to the inside of the first outer main drive body; a first outer hydraulic housing inserted into the first inner main driving body and configured to control the rotation of the main shaft by receiving a predetermined hydraulic pressure; a first inner hydraulic housing inserted into and coupled to an inner circumferential surface of the first outer hydraulic housing, providing a predetermined pressing force toward the main shaft when the hydraulic pressure is supplied, and to which the anti-backlash member is mounted; and a damper member coupled to the front end of the first inner hydraulic housing and reducing backlash of the main shaft.

According to one embodiment of the present invention, the main driving unit is configured between the outer and inner main driving bodies, pressurizes the first outer hydraulic housing to prevent leakage of the supplied fluid, and maintains the hydraulic pressure constant. It is characterized by further comprising a; main clamp for supporting to be.

According to one embodiment of the present invention, the upper head is provided with the sub-shaft, and is configured between a second inner hydraulic housing to which the anti-backlash member is mounted, and outer and inner main driving bodies configured in the upper head, , It is characterized in that a sub-clamp is further configured to pressurize the second outer hydraulic housing to prevent leakage of the supplied fluid and to support the hydraulic pressure to be constantly maintained.

According to one embodiment of the present invention, the anti-backlash member includes a rear pressing member configured to be in close contact with rear portions of the main bevel gear and the sub-bevel gear respectively constituted on the main shaft and the sub-shaft, and the rear pressing member. It is characterized in that it is composed of a pressurizing actuating means for actuating.

According to one embodiment of the present invention, the pressing actuating means includes a movable housing that presses the rear pressing member or releases the pressurized state, and a first drive configured in the movable housing to move the movable housing. A pressure actuating member composed of an actuating means and a second actuating actuating means for actuating the first actuating actuating means, a support housing to which the second actuating actuating means is coupled, and controlling the operation of the second actuating actuating means It is characterized in that it includes a pressure control unit and a sealing flange limiting the movement range of the movable housing.

According to one embodiment of the present invention, there is an effect that the angle of the spindle can be more precisely adjusted by preventing backlash that occurs when a tool for processing a workpiece is adjusted at various angles.

In addition, according to one embodiment of the present invention, the first and second brake modules are further provided on the ram and the upper head to fundamentally solve the phenomenon that the universal head unit moves when processing the workpiece by rotating the spindle. there is

1 is a cross-sectional view showing a universal head unit for a machine tool according to the prior art;
2 is a cross-sectional view showing a universal head unit for a machine tool according to an embodiment of the present invention;
3 is an enlarged view showing a main part of a universal head unit for a machine tool according to an embodiment of the present invention;
4 and 5 are operating state diagrams showing the positions of the spindles of the universal head unit for machine tools according to an embodiment of the present invention.

Specific aspects and specific technical features of the present invention will become more apparent from the following specific details and embodiments in conjunction with the accompanying drawings. In adding reference numerals to components of each drawing in this specification, it should be noted that the same components have the same numerals as much as possible, even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is directly connected or connectable to the other element, but there is another element between the elements. It will be understood that elements may be “connected”, “coupled” or “connected”.

Hereinafter, an embodiment of the present invention will be described in detail based on the accompanying drawings.

As shown, the universal head unit for a machine tool having an anti-backlash function of the present invention includes a main driving unit 100, an anti-backlash member 200, an upper head 300 and a lower head 400. .

The main drive unit 100 has a rear portion coupled to the ram assembly, a front portion coupled to the upper head 300, and configured to support the rotational operation of the main shaft 102 rotating the upper head 300 inwardly.

The main driving unit 100 is coupled to the outer main driving body 110 coupled to the ram assembly and the upper head 300, and to the inside of the outer main driving body 110, and the sensor mounting portion is configured on the upper front side The inner main drive body 120 and the first outer side inserted into the inner main drive body 120 and connected to the ram assembly to receive a predetermined hydraulic pressure and control the rotation of the main shaft 102 It is inserted into and coupled to the inner circumferential surface of the hydraulic housing 130 and the first outer hydraulic housing 130, the main shaft 102 passes through the center, and a predetermined pressing force toward the main shaft 102 by the supplied hydraulic pressure. A first inner hydraulic housing 140 that provides, a damper member 150 coupled to the front end of the first inner hydraulic housing 140 and reducing the backlash of the main shaft 102, and outer and inner main A main clamp 160 configured between the driving bodies 110 and 120, pressurizing the first outer hydraulic housing 130 to prevent leakage of the supplied fluid and supporting the fluid pressure to be maintained constant and a main sensor member 170 mounted on the front end of the inner main driving body 120 and detecting the rotation angle of the upper head 300 and transmitting the detected rotation angle to the control unit 500 .

Here, the main shaft 102 is connected to the sub-shaft 302 configured in the upper head 300 with its front portion to perform a rotational operation under the control of the control unit 500, which is configured in the sub-shaft 302 It is configured to include a main bevel gear 104 gear-engaged with the first sub-bevel gear 304 and a gear coupling part 106 to which the main bevel gear 104 is detachably coupled.

The outer main drive body 110 is coupled to the ram assembly on the outer surface of the rear side, and supports electrical connection between the control unit 500 and the main sensor member 170 built in the ram assembly, while main clamp 160 ) and by supplying a predetermined fluid to the main clamp 160, pressure is formed by the fluid.

The outer main drive body 110 is provided with a sensor cover 112 that protects the main sensor member 170 provided at the front end, and is embedded inside the sensor cover 112, and the main sensor member 170 It is configured to include an insulating cover 114 that improves fixing force and protects from external impact, and a filling part 116 that supplies fluid to the main clamp 160 so that a predetermined pressure is formed.

At this time, the sensor cover 112 is detachably coupled to the front end of the outer main driving body 110, and presses the insulating cover 114 when coupled so that it is tightly coupled with the main sensor member 170. can

The inner main drive body 120 is disposed in the central portion through which the outer main drive body 110 penetrates, and is configured to be engaged with the outer main drive body 110 by insertion, thereby forming the first outer hydraulic housing 130. It is a component that supports operation.

The inner main drive body 120 has a cable receiving groove 122 through which a cable or the like passes so that an electrical connection is made between the control unit 500 and the sub-sensor member 370 for detecting the rotation angle of the sub-shaft 302, which will be described later. is formed

In addition, the inner main driving body 120 is formed so that the central portion penetrates so that the first outer hydraulic housing 130 and the first inner hydraulic housing 140 are inserted in opposite directions, and the first outer hydraulic housing ( 130) is configured to block leakage of the fluid supplied through.

The first outer hydraulic housing 130 is inserted into the rear part of the inner main driving body 120, and the hydraulic supply unit 132 connected to the hydraulic supply unit for supplying a certain amount of fluid under the control of the control unit 500 to the inner surface is formed

It is preferable that the first outer hydraulic housing 130 is provided with a leakage preventing means for preventing leakage of the fluid supplied to the outer circumferential surface.

In addition, the first outer hydraulic housing 130 constitutes a hydraulic pressure forming part 134 in which a predetermined hydraulic pressure is formed while the fluid supplied to the front inner surface is discharged, and the hydraulic pressure forming part 134 controls the pressure. 1 It is configured to press the inner hydraulic housing 140 toward the main shaft 102 to control the rotational operation of the main shaft 102, that is, to perform a braking operation.

The first inner hydraulic housing 140 is inserted from the front portion of the inner main driving body 120, and the outer surface portion is inserted into the inner circumferential surface of the first outer hydraulic housing 130 to form the hydraulic pressure forming unit 134. The space is configured to have an airtight force.

That is, when fluid is supplied to the hydraulic forming unit 134, the outer surface of the first outer hydraulic housing 130 is in close contact with the inner circumferential surface of the inner main driving body 120, and the first inner hydraulic housing 140 is pressurized. By doing so, the inner circumferential surface of the first outer hydraulic housing 130 and the outer circumferential surface of the first inner hydraulic housing 140 are configured to control the rotation of the main shaft 102 while maintaining a state in close contact with each other.

In addition, the first inner hydraulic housing 140 has a bearing member for supporting the rotational operation of the main shaft 102 inserted into its front inner circumferential surface, and is in close contact with the front portion of the bearing member, and the main shaft 102 and the sub-shaft A damper member 150 that reduces backlash generated during driving between the 302 is configured.

The damper member 150 is configured between the rear part of the main shaft 102 and the front part of the bearing member, and presses the main shaft 102 and the bearing member by a predetermined elastic force, respectively, and the main shaft 102 By reducing the play in the axial direction that occurs during rotation, it is configured to reduce the backlash that occurs during driving of the main shaft 102 and thereby enable precise angle adjustment of the spindle.

The damper member 150 is mounted on the damper housing 152, and the damper housing 152 is fixedly coupled to the first inner hydraulic housing 140 to support the position of the damper member 150 to be stably fixed do.

When fluid is supplied to the side of the first outer hydraulic housing 130, the main clamp 160 receives a certain amount of fluid from the fluid supply unit, and forms a predetermined pressure by the supplied fluid while forming the first outer hydraulic housing 130. ), when the braking operation is performed, the first outer hydraulic housing 130 and the first inner hydraulic housing 140 serve to support the operation while maintaining a state in close contact with each other.

The main clamp 160 has a pressure forming part formed on its upper surface configured to form a predetermined pressing force while receiving the fluid supplied to the upper surface.

The main sensor member 170 is mounted on the front end of the inner main drive body 120, detects the rotation angle of the upper head 300 and transmits it to the control unit 500, and rotates the main shaft 102. When the upper head 300 rotates due to the operation, information on the rotation angle of the upper head 300 is detected and transmitted to the control unit 500, and the upper head 300 is rotated by the set rotation angle. It is configured to stop the rotation of the main shaft 110 by controlling the driving of the hydraulic supply device.

At this time, the main sensor member 170 transmits a signal to the controller 500 through the first lead wire 502 .

Meanwhile, the sub-sensor member 370 also rotates the sub-shaft 302 when the lower head 400 rotates by the set rotation angle due to the rotation of the sub-shaft 302, similar to the main sensor member 170 described above. It is installed on top of the upper head 300, detects the rotation angle of the lower head 400, and transmits a signal to the control unit 500 through the second lead wire 504. .

At this time, the control unit 500 controls the operation of the hydraulic supply device for the operation of the sub-clamp 360, the second outer hydraulic housing 330, and the second inner hydraulic housing 340 mounted on the upper head 300. can be configured to

The anti-backlash member 200 is mounted on the outer circumferential surfaces of the main shaft 102 and the sub-shaft 304 respectively constituted by the main drive unit 100 and the upper head 300, preferably the first and second inner hydraulic housings. It is inserted into the inner circumferential surface of (140, 340) and moved in the axial direction under the control of the control unit 500 to reduce the backlash of the main shaft 102 and the sub shaft 304, thereby making the angle of the spindle 410 more precise. It is configured to be adjustable, and is configured to include a rear pressing member 202 and a pressing operating means 204.

The rear pressing member 202 is seated in close contact with the rear parts of the main bevel gear 104 and the sub bevel gear 304 respectively constituted by the main shaft 102 and the sub shaft 302, and the pressing operation means 204 When driving, the main bevel gear 104 and the sub-bevel gear 304 are pushed forward, respectively, so that the main bevel gear 104, the sub-bevel gear 304, and the sub-bevel gear 304 are coupled with the spindle 410. ) It serves to reduce the backlash by reducing the gap between them, and is configured to include an elastic pressing member 210, an elastic fixing flange 220 and a contact ring 230.

As described above, the elastic pressing member 210 is configured to come into close contact with the rear parts of the main bevel gear 104 and the sub-bevel gear 304 .

The elastic fixing flange 220 is disposed at the rear portion of the elastic pressing member 210, and is coupled to the elastic pressing member 210 through a coupling means such as a fixing bolt, and the contact ring 230 is in close contact with the rear end thereof. It is configured to be configured so that the position of the elastic pressing member 210 is adjusted according to whether the movable housing 260 of the pressure operating means 240 for pressing the contact ring 230 is operated.

At this time, the elastic fixing flange 220 is configured to move along the axial direction of the main shaft 102 and the sub shaft 304 .

The pressing operating means 204 presses the rear pressing member 202 to reduce the gap between the bevel gears, and is disposed at the rear of the contact ring 230, and the main shaft 102 and the sub shaft ( 304), a movable housing 260 that presses the contact ring 230 or releases the pressurized state while moving in the axial direction of the movable housing 260, and a pressure operation member 240 that drives the movable housing 260 to be moved, Of the support housing 250 supporting the operation of the pressure operation member 240, the pressure control unit 280 and the movable housing 260 controlling the operation of the pressure operation member 240 coupled to the support housing 250. It is configured to include a sealing flange 270 to limit the range of movement.

Here, the front part of the movable housing 260 remains in contact with the contact ring 230, and the first driving actuating means 242 of the pressing actuating member 240 is mounted on the outer peripheral surface of the front side, and the first driving actuation means 242 is mounted. It is configured to move the main shaft 102 in the axial direction according to whether the operating means 242 is operated.

In addition, the pressure actuating member 240 is coupled to the first driving actuating means 242 configured to move the movable housing 260 under the control of the pressure control unit 280 and the support housing 250, and pressurizing It is connected to the controller 280 and consists of a second fixed operating means 244 that operates the first driving operating means 242 under the control of the pressurizing controller 280.

The first and second driving operation means 242, 244 may be composed of a magnetic body and a spring, preferably, the first driving operation means 242 may be made of a normal permanent magnet, and the second driving operation means ( 242) may be composed of an electromagnet that radiates the same pole as the permanent magnet, or diverges of a different pole.

Accordingly, when a driving signal is transmitted from the control unit 500 to reduce the backlash of the main bevel gear 104 or the sub-bevel gear 304 by the pressing control unit 280, the main bevel gear 104 or the sub-bevel gear 304 It may be configured to reduce play to either or both of the bevel gears 304 .

For example, the second drive operation means 242 configured on the main shaft 102 through the control of the pressure control unit 280 is similarly configured on the main shaft 102. When the magnetic force of the same type as the magnetic force is controlled to be dissipated, the movable housing 260 is moved by the pushing force of the magnetic force, and a predetermined pressing force is transmitted to the elastic pressing member 210 side of the rear pressing member 202, so that the main bevel It is configured to reduce the play between the gear 104 and the sub-bevel gear 304.

Although the present invention has been described in detail through an embodiment, this is for explaining the present invention in detail, and the universal head unit for a machine tool with easy angle adjustment according to the present invention is not limited thereto. In addition, terms such as "comprise", "comprise", or "have" described above mean that the corresponding component may be inherent unless otherwise stated, so excluding other components is not recommended. All terms, including technical or scientific terms, are generally understood by those skilled in the art to which the present invention belongs, unless otherwise defined. has the same meaning as being

In addition, the above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: main drive unit 102: main shaft
104: main bevel gear 106: gear coupling groove
110: outer main driving body 120: inner main driving body
130: outer hydraulic housing 140: inner hydraulic housing
150: damper member 160: main clamp
170: main sensor member 200: backlash prevention member
202: rear pressing member 204: pressing operation means
210: elastic pressing member 220: elastic fixing flange
230: close ring 240: pressure operation member
250: support housing 260: movable housing
270: sealing flange 280: pressurization control unit
300: upper head 302: sub shaft
304: sub bevel gear 360: sub clamp
370: sub sensor member 400: lower head
410: spindle 500: control unit

Claims (4)

A main driving unit coupled to the ram assembly, having a main shaft rotatably coupled therein, and having a main sensor member configured to detect a rotational angle of the upper head at a front portion;
an upper head coupled to a front part of the main drive unit, having a sub shaft connected to the main shaft, and having a sub sensor member configured therein to detect a rotation angle of the lower head;
a lower head having a spindle connected to the sub shaft to be rotatably coupled to the upper head;
A control unit receiving rotation angle information of an upper head and a lower head from the main sensor member and the sub sensor member and controlling the rotation of the main shaft;
It is mounted on the outer circumferential surfaces of the main shaft and the sub shaft, respectively, and is configured to precisely adjust the angle of the spindle by reducing the backlash of the main shaft and the sub shaft while the axial movement is performed under the control of the control unit. Absence; further including,
the main drive
An outer main drive body coupled to the ram assembly and the upper head, respectively;
an inner main drive body coupled to the inside of the outer main drive body;
a first outer hydraulic housing inserted into the inner main driving body and configured to control the rotation of the main shaft by receiving a predetermined hydraulic pressure;
a first inner hydraulic housing inserted into and coupled to an inner circumferential surface of the first outer hydraulic housing, providing a predetermined pressing force toward the main shaft when the hydraulic pressure is supplied, and to which the anti-backlash member is mounted;
a damper member coupled to a front end of the first inner hydraulic housing and reducing backlash of the main shaft;
a main clamp disposed between the outer and inner main drive bodies, pressurizing the first outer hydraulic housing to prevent leakage of the supplied fluid, and supporting the hydraulic pressure to be constantly maintained;
A universal head unit for a machine tool having an anti-backlash function comprising a.
delete According to claim 1,
on the upper head
a second inner hydraulic housing having the sub-shaft and having the anti-backlash member mounted;
The sub-clamp is constructed between the outer and inner main driving bodies of the upper head, and pressurizes the second outer hydraulic housing to prevent leakage of the supplied fluid and to support the hydraulic pressure to be constantly maintained.
A universal head unit for a machine tool having an anti-backlash function, characterized in that further configured.
According to claim 1,
The anti-backlash member,
A rear pressing member configured to be in close contact with rear portions of the main bevel gear and the sub bevel gear respectively constituted on the main shaft and the sub shaft;
A movable housing that presses the rear pressing member or releases the pressurized state;
A pressure actuating member composed of a first driving operating means constituted in the movable housing so as to move the movable housing, and a second driving operating means configured to operate the first driving operating means;
A support housing to which the second driving operation means is coupled;
A pressure control unit for controlling the operation of the second driving operating means;
Sealing flange limiting the range of movement of the movable housing
A universal head unit for a machine tool having an anti-backlash function comprising a.

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