JPH09168902A - Processing equipment - Google Patents

Abstract

(57) An object of the present invention is to provide a processing device capable of high-speed processing with a simple structure that simply uses a mechanism for changing the movement direction. SOLUTION: A main body 31 rotatably provided around a main axis C, and a control rod 32 provided so as to rotate integrally with the main body and linearly movable in the direction of the main axis C with respect to the main body. And a cutting tool 33 at the tip end, which is provided so as to be movable in a direction orthogonal to the main axis C with respect to the main body, and the linear motion of the control rod 32 to the main axis C of the tool holder 34. In order to control the machining radius of the machining head 30 provided with a motion direction changing mechanism for changing to the linear motion in the orthogonal direction, and the control rod 32, the connecting means R for transmitting the linear motion without transmitting the rotary motion. The driving means 40 is provided for driving via.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus,
In particular, the present invention relates to a machining device that performs machining by controlling movement of a cutting tool in a direction orthogonal to the main axis (also referred to as U-axis direction).

[0002]

2. Description of the Related Art Conventionally, as such a processing apparatus, for example, a processing apparatus described in Japanese Patent Laid-Open No. 6-335809 is known.

In this device, a U-axis control shaft is built in a main body attached to a main shaft, and a bevel gear is fixed to the tip thereof. Then, a feed screw having a bevel gear that meshes with the bevel gear is fixedly mounted on the main body in a direction orthogonal to the main axis. Further, a slider guided by the main body is attached to the feed screw while being paired with the screw, and a bite holder to which a machining tip is fixed is fixed to the slider.

When the U-axis feed motor rotates the U-axis control shaft in the forward and reverse directions, the feed screw is rotated via the bevel gear, and the slider moves in the direction orthogonal to the main axis.
As a result, the machining radius of the machining tip fixed to the bite holder is set.

[0005]

However, such a conventional device is provided with a pair of bevel gears, a feed screw, and a slider as constituent elements in addition to the U-axis control shaft and the bite holder to which the machining tip is fixed. First, the direction of rotational movement of the U-axis control shaft is changed by a bevel gear, the rotational movement is converted into a linear movement by a feed screw, and this is transmitted to a bite holder to which a machining tip is fixed via a slider. Therefore, there is a problem that the number of parts is large and inevitably becomes heavy. In addition, there is a problem that the mechanism is complicated and large because the movement direction is changed and the movement form is changed.

[0006] Due to such a problem, it is difficult to achieve rotational balance regardless of the machining radius, and as a result, high speed machining is impossible.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a processing apparatus capable of high-speed processing with a simple structure using only a mechanism for changing the movement direction.

[0008]

In order to achieve such an object, the invention as set forth in claim 1 is such that a main body rotatably provided around a main axis and the main body rotates integrally with the main body. At the same time, a control rod provided so as to be linearly movable with respect to the main body in the direction of the main axis and a machining tool at the tip end thereof are provided so as to be movable with respect to the main body in a direction orthogonal to the main axis. A machining head including a machining tool holding member, and a movement direction changing mechanism that changes a linear movement of the control rod into a linear movement in a direction orthogonal to the main axis of the machining tool holding member, and the machining head. In order to control the machining radius of the tool, the control rod is provided with drive means for driving the control rod through a connecting means that transmits a linear motion but not a rotary motion.

According to the second aspect of the present invention, the movement direction changing mechanism is composed of serrations formed in the end portion of the control rod and the machining tool holding member so as to mesh with each other. It is characterized by

Further, the invention according to claim 3 is characterized in that a pair of the machining tool holding members is provided in the main body symmetrically with respect to the main axis.

According to a fourth aspect of the present invention, in the movement direction changing mechanism, one end of each of a pair of transmission rods, one end of which is inclined and attached to the end portion of the control rod, and the other pair of machining. It is characterized by comprising serrations formed in a mutually meshing relationship with the respective tool holding members.

According to the present invention, in order to control the machining radius of the machining tool, the drive means drives the control rod in the main axis direction through the connecting means which transmits the linear motion without transmitting the rotary motion. The machining direction changing mechanism that changes the linear movement in the direction orthogonal to the main axis moves the machining tool holding member in the direction orthogonal to the main axis, and sets the machining radius of the machining tool.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Throughout the description and drawings, the same functional parts will be denoted by the same reference numerals to avoid redundant description.

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a base body of the apparatus, which rotatably supports a feed screw 14 via a bearing 12. A feed motor 16 drives the feed screw 14.

Reference numeral 20 denotes a spindle head slidably provided on the base body 10, and has a slider 21 that is screw-paired with the feed screw 14 described above. 22 is a spindle head 20
Is a hollow main shaft rotatably supported around a main axis C via a bearing 23, and is driven by a main shaft motor 25 via a gear mechanism 24.

Reference numeral 30 denotes a machining head attached to the main shaft 22, and referring to FIG. 2 as well, a main body 31 rotatably provided around the main axis C and the main body 31 rotate together with the main body 31. The main body 31 is provided with a control rod 32 which is linearly movable in the direction of the main axis C, and a cutting tool 33 as a machining tool at the tip thereof.
And a bite holder 34 as a machining tool holding member provided so as to be movable in a direction (U-axis direction) orthogonal to the. The tip of the control rod 32 and the bite holder 34
Serrations 32A, 34A are formed in the middle abdomen as movement direction changing mechanisms for changing the linear movement of the control rod in the main axis direction to the linear movement of the tool holder 34 in the U-axis direction.

In this embodiment, the main body 31
31A is formed at the end of the
The machining head 30 is attached to the main shaft 22 by stopping the bolts with bolts 35. Further, as shown in detail in FIG. 2, the control rod 32 is composed of two parts (32-1, 32-2) having a connecting portion J for allowing separation in the middle. An example of such a connecting portion J is shown in FIG. This connecting portion J is composed of a bayonet type connecting means,
Four engaging claws J-1 projecting outward in the radial direction are provided on the control rod 32-1 on the 0 side at equal intervals in the circumferential direction, and are provided in the control rod 32-2 on the main shaft 22 side in the radial direction. Projecting 4
The individual engaging claws J-2 are also provided at equal intervals in the circumferential direction. As is well known, the two are arranged such that the engaging claw J-1 is located between the engaging claws J-2, and the two are relatively moved in the axial direction with respect to each other, and then the two are rotated relative to each other. J-1 and the engaging claw J-2 are engaged and connected.

The connecting portion J is not limited to the above example,
It suffices if it can be easily attached and detached and can reliably transmit the linear motion in the direction along the main axis C. For example, it may be a screw pair.

Here, referring to FIG. 1 again, the spindle head 20 further connects the control rod 32 to control the machining radius of the cutting tool 33 by transmitting the control rod 32 to the linear motion without rotating the motion. The feeding mechanism 40 is provided as a driving unit that is driven via the.

The feed mechanism 40 is provided with a support member 41 forming a part of the spindle head 20 via a bearing 42 and a spindle C.
It has a rotating nut 43 rotatably supported around and a feed screw rod 44 screwed onto the rotating nut 43, and the rotating nut 43 is driven by a control motor 46 via a gear mechanism 45.

An example of the connecting means R is shown in FIG. The connecting means R in the present embodiment includes the inner peripheral surface of the cylindrical socket 44-1 formed at one end of the feed screw rod 44, and the control rod 3.
The ball bearing R-1 is provided between the outer peripheral surface and the outer peripheral surface of the second bearing 2. However, without being limited to this example, it goes without saying that any form of connecting means may be used as long as it transmits a linear motion without transmitting a rotary motion.

The spindle head 20, the machining head 30, and the driving means 40 described above, including the spindle motor 25 and the control motor 46, move integrally on the base body 10. The feed motor 16, the spindle motor 25, and the control motor 46 are each connected to an NC control device (not shown), and the rotation speed and the rotation amount are controlled by a predetermined control signal.

Although not shown, the work to be machined is fixed to the base body 10 on the extension of the main axis C.

In the above-described embodiment, the hole machining on the work is performed by rotating the spindle motor 25, and via the gear mechanism 24, the spindle 22 and the machining head 3 attached thereto.
While rotating 0 around the spindle C, the feed motor 16 is rotated to feed the spindle head 20 with the feed screw 14, and the machining head 30 is moved forward.

Here, when setting the machining radius of the cutting tool 33, the feed screw rod 44 is moved along the main axis C by rotating the control motor 46 and rotating the rotary nut 43 via the screw mechanism 45. Move straight forward and backward. Then, the linear movement of the feed screw rod 44 is transmitted to the control rod 32 via the connecting means R. Since the connecting means R does not transmit the rotational movement but the linear movement, the control rod 3
A linear motion is transmitted to the control rod 32 regardless of whether the shaft 2 is rotating together with the main shaft 22, that is, whether or not it is being machined. The linear movement of the control rod 32 (including 32-1 and 32-2) is a serration 32A, 3 as a movement direction changing mechanism.
Main shaft line C of the bite holder 34 through the engagement of 4A
It becomes a linear motion in the direction orthogonal to
A radial position of 3 is set.

As described above, the machining radius of the cutting tool 33 can be set before and during machining, and the stepped hole and the tapered hole can be machined, respectively.

As described above, according to this embodiment, it is the amount of eccentricity of the center of gravity of the bite holder 34 from the main axis C that affects the rotational balance of the machining head 30 with the setting of the machining radius. (This can be set to be small), and the variable factor can be significantly reduced as compared with the conventional one.

Next, another embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In the present embodiment, the former form is for hole drilling, whereas the outer form is for drilling.

In FIG. 6, reference numeral 50 denotes a machining head mounted on the spindle 22 as in the previous embodiment, including arm portions 51-1 and 51-2 arranged symmetrically with respect to the spindle axis C, around which. A rotatably provided main body 51, and a control rod 52 provided so as to rotate integrally with the main body 51 and to be linearly movable in the direction of the main axis C with respect to the main body 51.
And a bite 53 at the tip, and the arm 51 of the main body 51-
1, 51-2, and a pair of bite holders 54 that are provided so as to be movable in a direction (U-axis direction) orthogonal to the main axis C and that are also symmetrically arranged with respect to the main axis C. Then, in the other end of each of the pair of transmission rods 55 obliquely attached to the tip end portion of the control rod 52 and the middle abdominal portion of each of the pair of bite holders 54, the main axis C direction of the control rod 52 is formed. Serrations 55A and 54A are formed as movement direction changing mechanisms for changing the linear movement of the tool holder into the linear movement of the tool holder 54 in the U-axis direction. Regarding the serrations 55A and 54A, as shown in FIG.
Since the inclination of the transmission rod 55 is compensated, the inclination is different and the shape is the same, so that the illustration is omitted.

Also in this embodiment, when the machining radius of the cutting tool 53 is set, the control motor 46 is rotated,
By rotating the rotating nut 43 via the screw mechanism 45, the feed screw rod 44 is linearly moved forward and backward along the main axis C. Then, the linear movement of the feed screw rod 44 is transmitted to the control rod 52 via the connecting means R. The linear movement of the control rod 52 results in the parallel movement of the pair of transmission rods 55 attached to the control rod 52 in an inclined manner, and the serration 55
A pair of bite holders 5 through the meshing of A and 54A
4 is a linear motion in a direction orthogonal to the main axis C, and the radial position of the cutting tool 53 at the tip thereof is set. In FIG. 6 (A), W is a work, the outer periphery of which is turned by a pair of cutting tools 53 symmetrically arranged with respect to the main axis C.

[0032]

As described above, according to the first aspect of the invention, the connecting means for transmitting the linear motion without transmitting the rotary motion by the drive means in order to control the machining radius of the machining tool. When the control rod is driven in the main axis direction via
By the movement direction changing mechanism that changes the linear movement in the direction orthogonal to the main axis, the machining tool holding member is moved in the direction orthogonal to the main axis and the machining radius of the machining tool is set. The number of points is small, and the size and weight can be reduced. As a result, high speed processing is possible.

According to a second aspect of the present invention, the movement direction changing mechanism is composed of serrations formed so as to mesh with each other between the end portion of the control rod and the machining tool holding member. Therefore, the structure is simple and the formation is easy.

Further, according to the invention of claim 3,
Since the pair of machining tool holding members is symmetrically provided on the main body with respect to the main axis, the rotational balance is always maintained regardless of the machining radius, and higher-speed machining becomes possible.

According to the fourth aspect of the present invention, the movement direction changing mechanism is configured such that one end of each of the pair of transmission rods is inclined to one end of the control rod and the other end of the pair is formed. Since it is composed of serrations formed in a mutually meshing relationship with each of the machining tool holding members, the structure is simple and the formation is easy.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a spindle and a machining head according to an embodiment of the present invention.

FIG. 3 is an enlarged perspective view showing an example of a connecting portion according to an embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view showing an example of the connecting means according to the embodiment of the present invention.

FIG. 5 is an enlarged perspective view showing an example of the movement direction changing mechanism according to the embodiment of the present invention.

6A and 6B show another embodiment of the present invention, in which FIG. 6A is a front sectional view, FIG. 6B is a side sectional view, and FIG.

[Explanation of symbols]

 10 Base Body 20 Spindle Head 22 Spindle 30, 50 Processing Head 31, 51 Main Body 32, 52 Control Rod 33, 53 Bit 34, 54 Bit Holder 40 Drive Means 43 Nut Member 44 Feed Screw Rod J Connection Part R Connection Device

Claims (4)

[Claims] 1. A main body rotatably provided around a main axis, and a control rod which rotates integrally with the main body and is linearly movable with respect to the main body in a direction of the main axis. A machining tool holding member provided with a machining tool at a tip end thereof and provided so as to be movable in a direction orthogonal to the main axis with respect to the main body, and a linear movement of the control rod to the main spindle of the machining tool holding member. A machining head provided with a motion direction changing mechanism for changing to a linear motion in a direction orthogonal to a line, and in order to control the machining radius of the machining tool, the control rod is used to transmit a linear motion without transmitting a rotary motion. A processing apparatus comprising a driving unit that is driven via a connecting unit that transmits. 2. The movement direction changing mechanism is composed of serrations formed in a mutually meshing relationship with the end portion of the control rod and the machining tool holding member. The processing device described. 3. The machining apparatus according to claim 1, wherein the machining tool holding member is provided in the main body in a pair symmetrically with respect to the main axis. 4. The movement direction changing mechanism is arranged such that one end of each of the pair of transmission rods, one end of which is inclined and attached to the end portion of the control rod, and the other of the pair of machining tool holding members. The processing device according to claim 3, wherein the processing device is formed of serrations formed in a meshing relationship with each other.