JP3130748B2 - Engraving tool and device therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engraving tool used for engraving a surface of a work and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, when engraving a serial number or a product name on a surface of a work made of metal or plastic,
For example, an engraving machine as disclosed in Japanese Patent Publication No. 4-51248 has been used. In this engraving machine, an engraving pen supported by a moving body so as to be movable up and down is vibrated by air pressure to engrave the surface of the work.

[0003]

However, since this conventional engraving machine is configured as a dedicated machine for performing only engraving, the initial cost is high and the cost is low when the operation rate of the machine is low. Cannot be amortized.
In addition, since it is a dedicated machine, an installation space is required even when it is not in use, which hinders the effective use of space in a factory or the like.

The present invention has been made by paying attention to such problems existing in the conventional technology. Its purpose is to attach it to the spindle of a machine tool such as a machining center and use it only when engraving is necessary, which can reduce initial costs and require a large installation space when not in use. It is not to provide an engraving tool. Another object of the present invention is to provide an apparatus suitable for mounting the engraving tool.

[0005]

In order to achieve the above object, according to the present invention, there is provided an automatic tool changer having a chuck portion which is held by a tool changing arm and which is detachable from a main shaft of a machine tool. A tool holder, an air passage provided in the tool holder so as to be connected to an air supply source when the tool holder is mounted on the main spindle, and an air passage attached to the tool holder and supplied through the air passage By air pressure
An automatic tool changer equipped with an engraving pen that engraves the surface of the work by vibrating in the axial direction of the tool holder
It is characterized by the following.

[0006] In claim 2, in claim 1,
The engraving pen is capable of moving back and forth in the axial direction with respect to the tool holder, and is urged in the advancing direction by urging means. According to a third aspect of the present invention, in the second aspect, the tool holder includes a sensor for detecting a retreating operation accompanying the contact of the engraving pen with the workpiece.

According to a fourth aspect, in any one of the first to third aspects, the engraving pen is detachably attached to a tool holder. In claim 5, claim 4
In, the engraving pen is held by the pen holder and can move forward and backward with respect to the tool holder together with the pen holder, and the engraving pen is detachable from the pen holder.

[0008] In claim 6, in claim 5,
The engraving pen is held by a pen holder via a vibration absorbing material. According to a seventh aspect, in any one of the first to sixth aspects, the tool holder is rotatably supported by an air supply ring, and the air supply ring has a connection port, and the connection port is provided with an air supply port. Connected to the air supply port that is connected to the source and opened to the non-rotating part on the spindle side ,
When the connection port is connected to the air supply port, the connection port
And the connecting pin provided with the check valve is pressed and moved.
The through holes formed in the connection pins are provided in the tool holder.
Matches the air passage that is

In claim 8, in claim 7,
The connection port is configured to be connected to the air supply port as the tool holder is mounted on the spindle. According to a ninth aspect, in any one of the first to sixth aspects, the tool holder is connected to an air supply source and is detachably connected to an air supply path provided at a shaft center of a main shaft. The connection end of the air passage is opened at the center of the tip of the tool holder.

According to a tenth aspect of the present invention, there is provided a tool holder having a chuck portion gripped by a tool changing arm and detachably attached to a main spindle of a machine tool, and connected to an air supply source when the tool holder is mounted on the main spindle. And an engraving pen attached to the tool holder and engraved on the surface of the work by being actuated by air pressure supplied through the air passage. A main tool, which is movable relative to the work in three directions of X, Y, and Z, and which detachably supports the engraving tool;
Air supply means for supplying air to the engraving tool, setting means for setting processing condition data such as at least the moving speed of the spindle and air pressure according to the type of workpiece and the processing portion, and processing conditions from the setting means. It is provided with a selection means for selecting data and a control means for controlling a processing operation based on the selected processing condition data.

[0011] According to an eleventh aspect, in the tenth aspect , the control means is configured to start a machining operation based on an output from a sensor that detects that the engraving tool has reached the workpiece.

[0012]

When the engraving tool according to the first aspect is used, when the engraving tool is mounted on the main shaft of the machine tool by the tool change arm, the air passage is connected to the air supply source. In this state, air is supplied from the air supply source to the air passage, and the engraving pen is operated by the air pressure to engrave the surface of the work. Therefore, the engraving tool can be mounted on the main spindle of the machine tool and used only when engraving is required.

According to the second aspect of the present invention, the engraving pen is retracted by contact with the work, thereby preventing the engraving pen from being damaged.
According to the third aspect, the device can be automatically started by the detection of the sensor.

According to the present invention, when the engraving pen is worn or damaged, the engraving pen can be removed from the tool holder and replaced with a new one. In claim 5, the engraving pen is not directly supported by the tool holder, but is supported by the pen holder.
The support state is strong.

According to the present invention, the vibration during use of the engraving pen can be absorbed by the vibration absorbing material. According to the seventh aspect, even if the main shaft of the machine tool is erroneously rotated, the transmission of the rotational force to the air supply ring can be prevented.

According to the present invention, when the tool holder is mounted on the main shaft, the air supply port and the connection port are connected, and the air passage is connected to the air supply port. Therefore, at the time of tool change, an automatic tool change is enabled without requiring an air connection operation.

According to the ninth aspect, when the tool holder is mounted on the main spindle, the air passage of the tool holder is directly connected to the air supply path of the main spindle, so that air can be easily supplied. According to the tenth aspect, an optimal processing mode is secured according to the processing conditions such as the type of work.

In the eleventh aspect, the device is automatically started by the detection of the sensor.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, in a machine tool such as a machining center, a spindle head 1 as a non-rotating portion is movably supported by a frame (not shown), and is reciprocated in the Z-axis direction by a servo motor 12 shown in FIG. The work 6 is placed and fixed on a table (not shown),
The table is moved in the X-axis direction and the Y-axis direction. A spindle 2 is rotatably supported on the spindle head 1 via a plurality of bearings 3, and a tapered hole 4 for mounting a tool is formed at the tip of the spindle 2.

The supply block 9 is attached to a side end of the spindle head 1 and has a fixed air passage (hereinafter simply referred to as an air passage) 9a formed therein. It is open. Air supply source 11
Is connected to the air passage 9a via an electropneumatic regulator 13. The air supply source 11 and the electropneumatic regulator 13 constitute air supply means.

The engraving tool 5 indicates the entire engraving tool of this embodiment. When the engraving tool 5 is attached to the main spindle 2, the tool holder 15 is inserted into the tapered hole 4 of the main spindle 2 at the shank portion 18, and the pull stud 7 at the tip and the engaging ball 8 on the main spindle 2 side are connected. The engagement holds the engraving tool 5 in the mounted state. When performing other processing such as drilling on the work 6, another tool such as a drill (not shown) can be attached to the tapered hole 4 of the main shaft 2 in exchange for the engraving tool 5. The engaging ball 8 is movable in the axial direction of the main shaft 2, and is moved downward from the state of FIG.
The engagement of the engaging ball 8 with the engraving tool 5 is released.
Can be withdrawn from the main shaft 2.

Therefore, the configuration of the engraving tool 5 will be described in detail. As shown in FIGS. 1 and 2, the air supply ring 16 has a first air passage 39a. The tool holder 15 has a pair of bearings 17 in an air supply ring 16.
The shank 18 is formed at one end thereof so as to be fitted into the tapered hole 4 of the main shaft 2, and the pull stud 7 is fixed to the tip of the shank 18. ing. The mounting hole 19 is the tool holder 1
5 is formed at the other end. The storage chamber 19 a is formed in the tool holder 15 so as to communicate with the mounting hole 19. The chuck portion 20 is fitted and fixed to the tool holder 15,
A chuck groove 21 to be gripped by a tool changing arm of a tool changing device (not shown) is formed on the outer periphery thereof. Then, the tool holder 15 is gripped by the tool change arm in the chuck groove 21 and is exchanged, so that the engraving tool 5 is taken out from a tool magazine (not shown) and mounted on the spindle 2 or removed from the spindle 2. And stored in a tool magazine.

The supply shaft 24 is provided with the mounting hole 19 and the accommodation chamber 1.
A third air passage 24a is formed in the inside 9a so as to be vertically movable and connected to the first air passage 39a via the second air passage 15a. A magnet 46 on a disk is fixed to the upper end of the supply shaft 24 via the arm 31.

A sensor 47 including a magnetic detecting element is arranged in the supply ring 16 so as to detect the magnet 46. On the outer surface of the supply ring 16, a light emitter 48 that constitutes one side of a photocoupler electrically connected to the sensor 47 is arranged. A photoreceptor 49 constituting the other side of the photocoupler is arranged on the outer surface of the head 1 so as to face and close to the light emitter 48.

The holding cylinder 14 is detachably fixed to the lower surface of the supply ring 16 by screws 14a. The cylindrical pen holder 22 is inserted into the holding cylinder 14 via the metal 14b so as to be able to advance and retreat (vertical direction in FIG. 1), and is urged in the advance direction by a coil spring 23 as urging means. The engraving pen 25 is connected at its upper end to the lower end of the supply shaft 24 via a screw, and the third air passage 24a communicates with the inside of the engraving pen 25.

The engraving pen 25 is detachably mounted in the pen holder 22 by being clamped at the lower end of the pen holder 22 via a rubber sleeve 28 having a two-part structure by tightening a pair of screws 27. The sleeve 28 constitutes a vibration absorbing material. A stylus 29 made of a hard metal is detachably attached to the lower end of the engraving pen 25. The engraving pen 25 is, for example,
No. 27397 discloses a reciprocating stylus mechanism (not shown) using air similar to the operation principle. With this mechanism, the engraving pen 25 causes the stylus 29 to reciprocate in small increments by the pressure of air supplied from the supply port 10 through the first to third air passages 39a, 15a, 24a.
The surface of the work 6 is engraved.

As shown in FIG. 2, the mounting hole 32 is formed in the air supply ring 16 so as to extend in parallel with the axis of the tool holder 15. A hollow connection pin 33 having a connection port 33a formed at the distal end is slidably fitted into the mounting hole 32, and a through hole 34 is formed at a substantially intermediate portion thereof. The connection pin 33 forms a part of the first air passage 39a. The spring 35 is interposed between the inner bottom of the mounting hole 32 and a spring seat 36 in the connection pin 33, and the connection pin 3
3 is urged in a direction protruding from the upper surface of the ring 16. As shown in FIG. 1, when the tool holder 15 is mounted on the tapered hole 4 of the main shaft 2 with a predetermined phase via a key, the connection pin 33 is pressed against the air supply ring 16 against the urging force of the spring 35. The connection port 33
a is connected to the supply port 10 of the supply block 9.

The spherical check valve 37 is disposed at the upper end of the connection pin 33 and is always kept at a position where the connection port 33a of the connection pin 33 is closed by the urging force of the spring 38.
When the connection pin 33 is connected to the supply port 10 of the supply block 9 at the connection port 33a while being pressed and moved into the ring 16, the through-hole 34 of the connection pin 33 becomes the first air passage 39a.
And the air passages 39a, 15
Air is supplied into the engraving pen 25 through the a and 24a.

The stopper 40 is screwed into a screw portion 41 on the outer periphery of the connection pin 33 and is fixed at a predetermined position by a nut 42. An engagement hole 43 is formed at an intermediate portion.
The guide pin 44 projects from the upper surface of the air supply ring 16 and is engaged with the engagement hole 43 of the stopper 40. Then, by the engagement between the guide pin 44 and the engagement hole 43,
The rotation of the connection pin 33 is restricted and the stopper 40
Is determined.

The engagement groove 45 is cut out on the outer periphery of the tool holder 15 so as to correspond to the stopper 40 at a constant phase. As shown in FIG. 2, when the engraving tool 5 is removed from the main shaft 2 of the machine tool in a fixed phase state, the connecting pin 33 is biased by the spring 35 to rotate the ring 16.
When the tool holder 15 is moved to the upper projecting position, the tip of the stopper 40 is engaged with the engagement groove 45, and the relative rotation of the tool holder 15 with respect to the ring 16 is restricted.

As shown in FIG. 3, the machine tool having the spindle head 1 has a control device 50 as a control means provided with a central processing unit (CPU), various memories and the like (not shown). ing. The control device 50 includes a numerical control unit 51, a machining program storage unit 52, a machining condition storage unit 53 as setting means, an actuator control unit 54, and the like. The numerical controller 51 controls the movement of the table in the X and Y axis directions and the movement of the spindle head 1 in the Z axis direction. The machining program storage unit 52 stores a program for controlling the operation of the machine tool, font data of engraved characters, and the like.

The processing condition storage section 53 stores processing data corresponding to various processing conditions. That is, data indicating the control amount of the electropneumatic regulator 13 and the servomotor 12 is stored in accordance with the material of the work 6 and the type of characters to be processed.
Data such as the pressure of the air supplied to the head 5 and the moving speed of the head 1 are determined. Actuator control unit 5
Reference numeral 4 controls the operations of the servomotor 12 and the electropneumatic regulator 13 via drive circuits 55 and 56, respectively. The input unit 57 as a selection means is composed of a keyboard or the like, and inputs a work type and the like. The display 58 displays various information.

Next, the operation of the engraving tool configured as described above will be described. When performing engraving on the work 6, the engraving tool 5 is removed from the tool magazine by a tool exchange arm (not shown), and the spindle 2 of the machine tool is rotated.
Attached to. With this mounting, the connection pin 33 is connected to the supply port 10 of the supply block 9 on the machine tool side while being pressed and moved into the air supply ring 16. Thus, the connection pin 33 can be connected to the supply block 9 only by mounting the engraving tool 5 on the main shaft 2, and the connection is simple.

When the spindle head 1 descends along the Z axis and the stylus 29 of the engraving pen 25 comes into contact with the workpiece 6, the engraving pen 25 stops moving downward. Since the sensor 47 continues to descend against the force, the sensor 47 also descends, and the sensor 47 detects the magnet 46 in opposition to the magnet 46. Based on the detection, the light emitting body 48 electrically connected to the sensor 47 emits light, and the light is received by the light receiving body 49 facing the light emitting body 48, so that the air supply from the air supply source 11 is stopped. It starts automatically. For this reason, air is supplied to the engraving pen 25 via the electropneumatic regulator 13, the air passages 39a, 15a, 24a, etc., and the engraving pen 25 is operated by the air pressure, whereby the stylus 29 is reciprocated in small increments. . At the same time, the work is moved in the X-axis and Y-axis directions. By this movement, the surface of the work 6 can be engraved in a required shape as shown in FIG.

Since the engraving pen 25 retreats relatively to the spindle head 1 due to the contact with the work 6, the stylus 29 is not damaged when the spindle head 1 is lowered. Therefore, it is not necessary to change the amount of movement of the spindle head 1 in the Z-axis direction even if the thickness and the mounting position of the work 6 are different.

During this engraving, as shown in FIG. 4, for example, at the corner portion 60, the intersection 61, the engraving start position, etc., double engraving is performed by crossing or reciprocating operation of the engraving path. In addition, as shown by a two-dot chain line L in FIG. On the other hand, in this embodiment, in order to prevent such a situation, the processing condition storage unit 53 stores, for example, FIG.
As shown in FIG. 7, a plurality of types of processing condition data are set in correspondence with the types of workpieces (aluminum (Al), stainless steel (SUS), etc.). As processing conditions, an air supply pressure, a spring deflection amount, a processing feed speed, a Z-axis approach speed, a Z-axis approach vibration start time, an air supply pressure at that time, and the like are set.

A condition No. is set by a combination of these condition data. Using this condition No., a machining condition at the corner portion 60 or the intersection 61, that is, a condition such as increasing a feed speed is set in a program. Specify it. Thereby, clear characters can be written at the corners 60 and the intersections 61 without particularly deepening the engraving.

The air pressure applied to the engraving pen 25 is the same between the case where the work 6 is relatively soft such as aluminum and the case where the work 6 is hard such as stainless steel. Even the cutting depth is different.
For this reason, in this embodiment, a plurality of data relating to the opening degree of the electropneumatic regulator 13, that is, the air supply pressure is stored in the processing condition storage unit 53. The operator enters the input unit 5
7, the condition No. corresponding to the material of the work 6 is selected and inputted into the program, whereby the electropneumatic regulator 13 is controlled based on the condition data so as to have the optimum opening. As a result, the engraving pen 25 is vibrated in an optimal manner, and a required cutting depth can be obtained.

During engraving, the vibration of the engraving pen 25 from the stylus 29 is absorbed by the sleeve 28, so that the vibration is not transmitted to the tool holder 15 and the adverse effect on the machine tool can be prevented. Can be reduced.

Even if the main shaft 2 is erroneously rotated, the tool holder 15 can rotate relative to the ring 16, so that no rotational force is transmitted to the ring 16, and the supply block 9 and the connection pin 33 are connected to each other. Connection is not damaged. In addition, the engraving pen 25 is attached to the tool holder 15 while being held by the pen holder 22. For this reason, the assembling of the engraving pen 25 is strengthened, and the engraving pen 25 does not shake and accurate processing can be reliably performed.

As described above, only when engraving is necessary, the engraving tool 5 is mounted on the main shaft 2 of the machine tool, and the work 6 is engraved. Therefore, a dedicated engraving machine is not required. When engraving is not performed, the engraving tool 5 is housed in a tool magazine, another tool such as a drill is mounted on the spindle 2, and the machine tool is used for other processing such as drilling. Can be. For this reason, unlike a case where a dedicated engraving machine is used, no wasted installation space is required, and the initial cost can be reduced.

Further, when the engraving pen 25 is worn or damaged, the screw 14a is loosened to remove the holding cylinder 14, and the supply shaft 24 and the engraving pen 25 are unscrewed. Is removed from the holding cylinder 14, the screw 27 is removed, and the engraving pen 25 is removed from the pen holder 22. And if it is replaced with a new one, the work of replacing the engraving pen 25 can be easily performed.

[0043]

[Other Embodiment] As shown in FIG. 7, an air supply passage 65 extends through the axis of the main shaft 2. The air passage 66 is provided in the tool holder 15, and the upper connection end 66 a opens at the center of the tool holder 15, and communicates with the air supply passage 65 when the tool holder 15 is mounted on the main shaft 2. Air passage 66
Is in communication with the third air passage 24a. Therefore, air is supplied into the engraving pen 25 through the air supply path 65, the air passage 66, and the third air passage 24a.

In this alternative example, since the air supply ring 16 can be omitted, the structure is further simplified. In addition, this invention may be embodied by changing or partially omitting the following as follows. (1) The connection pin 33 is immovably supported with respect to the ring 16 and is configured to be connected to the supply port 10 of the supply block 9 via an elastic coupling. (2) The pen holder 22 and the engraving pen 25 are integrated. (3) The engraving pen 25 can be directly mounted on the tool holder 15. (4) The movement sensor of the magnetic detection element is performed by another proximity sensor or the like. (5) Use an electropneumatic regulator with a general regulator. (6) Transmission / reception by the light emitter is performed by another transmission / reception means.

The technical ideas grasped from the embodiments will be described below. (A) A light emitter electrically connected to the sensor is provided on the tool holder, and a light receiver is provided on the main shaft side of the machine tool so as to face the light emitter. 4. The engraving tool according to claim 3, wherein the tool emits light and the light is received by a light receiving body. With this configuration, the supply of air from the air supply source is automatically started.

[0046]

The present invention is configured as described above, and has the following effects. In the first aspect, the engraving tool can be mounted on the main shaft of the machine tool and used only when engraving is necessary, and a dedicated machine is not required.

In the second aspect, the engraving pen is retracted by contact with the work, thereby preventing the engraving pen from being damaged.
According to the third aspect, the device is automatically started by the detection of the sensor.

According to the present invention, when the engraving pen is worn or damaged, the engraving pen can be easily removed from the tool holder and replaced with a new one. According to the fifth aspect, the engraving pen is not directly supported by the tool holder, but is supported by the pen holder, so that the supporting state is strong.

According to the sixth aspect, the vibration when the engraving pen is used can be absorbed by the vibration absorbing material. According to the seventh aspect, even if the main shaft of the machine tool is erroneously rotated, the rotation of the air supply ring can be prevented from being transmitted.

In the eighth aspect, the air supply port and the connection port are connected with the attachment of the tool holder to the main shaft, and the air passage is connected to the air supply port. Therefore, at the time of tool change, an automatic tool change is enabled without requiring an air connection operation.

According to the ninth aspect, the structure of the engraving device can be simplified. According to the tenth aspect, the optimum processing conditions can be set according to the type of the workpiece and the processed portion, and clear and clear marking can be performed under the optimum processing conditions.

In the eleventh aspect, the device is automatically started by the detection of the sensor.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of an engraving tool of the present invention.

FIG. 2 is a partially broken front view of the engraving tool.

FIG. 3 is a block diagram showing an electrical configuration.

FIG. 4 is a plan view showing characters to be engraved.

FIG. 5 is a sectional view of an engraved part.

FIG. 6 is an explanatory diagram showing an example of processing conditions.

FIG. 7 is a sectional view showing an engraving tool according to another embodiment.

[Explanation of symbols]

2 ... spindle, 5 ... engraving tool, 6 ... work, 10 ... supply port, 11 ... air supply source as air supply means, 15 ... tool holder, 16 ... air supply ring, 22 ... pen holder,
23: Coil spring as urging means, 25: Engraving pen, 28: Sleeve as vibration absorbing material, 29: Stylus, 33: Connection pin, 33a: Connection port, 39a, 39
b, 24a: air passage, 47: sensor, 50: control device as control means, 53: descending condition storage unit as setting means, 57: input unit as selection means.

Continuation of front page (56) References JP-A-5-278398 (JP, A) JP-A-63-300862 (JP, A) JP-A-6-229403 (JP, A) JP-A-1-71015 (JP, A) , U) Japanese Utility Model Showa 61-120446 (JP, U) Japanese Patent Publication No. 51-46314 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B44B 5/00

Claims (11)

(57) [Claims] 1. A tool holder having a chuck portion gripped by a tool change arm of an automatic tool changer, detachable from a main shaft of a machine tool, and an air supply source when the tool holder is mounted on the main shaft. An air passage provided in the tool holder so as to be connected, and an air pressure attached to the tool holder, which is vibrated in the axial direction of the tool holder by air pressure supplied through the air passage so that the workpiece is Automatic with engraving pen for engraving the surface
An engraving tool characterized in that the tool can be changed . 2. The engraving tool according to claim 1, wherein the engraving pen is capable of moving back and forth in the axial direction with respect to the tool holder, and is energized in the advancing direction by urging means. 3. The engraving tool according to claim 2, wherein the tool holder includes a sensor for detecting a retreating operation accompanying the contact of the engraving pen with the workpiece. 4. The engraving tool according to claim 1, wherein the engraving pen is detachably attached to the tool holder. 5. The engraving tool according to claim 4, wherein the engraving pen is held by the pen holder and can move forward and backward with respect to the tool holder together with the pen holder, and the engraving pen is detachable from the pen holder. 6. The engraving tool according to claim 5, wherein the engraving pen is held by a pen holder via a vibration absorbing material. 7. The tool holder is rotatably supported by an air supply ring. The air supply ring has a connection port, and the connection port is connected to an air supply source and is connected to a non-rotating portion on a main spindle side. When the connection port is connected to the air supply port, it is detachably connected to the air supply port
The connection pin that forms the connection port and the check valve is
Pressure and the through-hole formed in the connection pin
Engraving tool according to any one of claims 1 to 6 you, characterized in that matches the air passage provided in. 8. The engraving tool according to claim 7, wherein the connection port is connected to the air supply port as the tool holder is mounted on the spindle. 9. The connecting end of the air passage is connected to the center of the tip of the tool holder so that the tool holder is detachably connected to an air supply path connected to an air supply source and provided on the axis of the main shaft. The engraving tool according to claim 1, wherein the engraving tool has an opening. 10. A tool holder having a chuck portion gripped by a tool change arm of an automatic tool changer, detachable from a main shaft of a machine tool, and an air supply source when the tool holder is mounted on the main shaft. An air passage provided in the tool holder so as to be connected, and an air pressure attached to the tool holder, which is vibrated in the axial direction of the tool holder by air pressure supplied through the air passage so that the workpiece is Automatic with engraving pen for engraving the surface
Engraving tools with exchangeable tools, a main shaft that can move relative to the workpiece in three directions of X, Y, and Z, and that detachably supports the engraving tools, and supplies air to the engraving tools Air supply means, setting means for setting processing condition data such as at least the moving speed of the spindle and air pressure according to the type of work and the processing portion, and selecting means for selecting processing condition data from the setting means. An engraving apparatus comprising: control means for controlling a processing operation based on the selected processing condition data. Wherein said control means is engraving apparatus of claim 10, engraving tool is configured to start the processing operation by the output from the sensor for detecting that reaches the workpiece.