JP3112318B2 - Cutting device and cutting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device and a cutting method for cutting an end surface and an outer peripheral surface of a cylinder portion of a shaft portion in an assembly part comprising a shaft portion and a setting mounting portion which are relatively rotatable. More particularly, the present invention relates to a cutting device and a cutting method for cutting a lead serving as a tape running guide on a reference surface of a product on an end surface of a cylinder portion of an 8 mm VTR or the like and an outer peripheral surface.

[0002]

2. Description of the Related Art A conventional collet chuck for a workpiece is disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 63-91311. The collet chuck for a workpiece includes a collet sleeve slidably mounted on the base and slidably with respect to the base, a collet inserted through the collet sleeve so as to be slidable with respect to the base, and a collet for urging the collet against the base in the forward direction. And a clamp spring for urging the collet sleeve against the collet in the forward direction so as to close the collet. Between the collet sleeve and the collet, there is provided a collet opening / closing space capable of retracting the collet sleeve against the collet against the spring for clamping and engaging means for engaging the collet sleeve with each other when the collet sleeve is retracted. . A drive pin is elastically protruded from an end of the rotating main shaft at an eccentric position. The driving pin is elastically inserted into a hole formed in the workpiece to rotate the workpiece. One end of the shaft portion of the workpiece is attached to the clamp rest with a spring and a screw, and the other end is attached by being pressed by the spring force of the collet.

[0003] Further, as an apparatus for turning assembly parts, there is one disclosed in Japanese Patent Application Laid-Open No. 2-59203. The turning device for the assembly part is a VTR, 8mm VTR, D
A curving process such as a lead process is performed on an assembly part composed of a relative rotating member such as an AT, and one end of the shaft member in an assembly part composed of a relatively rotatable shaft member and an outer member is provided. A first holding portion for supporting, a second holding portion capable of moving forward / backward with respect to the first holding portion and supporting the other end of the shaft member, a rotatable member disposed on the first holding portion and the outer member A main shaft means for giving a rotational movement necessary for turning, and a driver means attached to the first holding portion and giving a rotational movement to the shaft member.

As an NC cutting apparatus, Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent Application No. -88102. The NC cutting apparatus can perform high-speed lead processing on a VTR cylinder, such as a lead shape serving as a guide during tape running, and is fixed on an NC controlled XZ moving table and cuts a workpiece. Spindle means incorporating a servomotor for providing necessary rotation to the workpiece, clamp means for holding and positioning a workpiece provided on the spindle means, a fixed table set at a position facing the workpiece held by the clamp means, A cutting tool rest mounted on a fixed table and capable of independently reciprocating with respect to the workpiece; and a servomotor fixed to the fixed table and reciprocating the cutting tool post.

Japanese Patent Application Laid-Open No. 2-180503 discloses a tool rest device for lead machining and an NC lead machining device using the tool rest device. The tool rest apparatus for reed machining reciprocates a tool mounting slide at a high speed, and includes a servomotor fixed to a table, a male screw formed on a rotary shaft integrated with a drive shaft of the servomotor, and a screw on the male screw. A nut member that is fitted to and can reciprocate in response to the rotational movement of the rotating shaft; and a blade mounting slide fixed to the nut member and having a blade mounted at one end. The blade mounting slide is reciprocally slidably supported on a slide base fixed to the table via an air bearing. In addition, the NC lead processing device can perform high-speed lead processing on a VTR cylinder such as a lead shape serving as a guide during tape running.

[0006]

However, in the collet chuck for a work disclosed in the above-mentioned Japanese Utility Model Application Laid-Open No. 63-91311, a driving pin for applying a rotational force to a work is only a rotational force applied to the work. In addition, the structure provides a thrust by elastic force, so the axial position of the workpiece is always kept in an unstable state, and when machining the outer surface of the workpiece, high precision is achieved for axial machining. I can't expect it. To fix the shaft of the workpiece, one end of the shaft of the workpiece is attached to the clamp rest with a screw and a spring, and the other end is pressed by the spring force of the collet. Since the workpiece is urged in the axial direction, the holding state of the workpiece in the axial direction is always unstable, and there is a problem that high precision cannot be expected in the axial machining accuracy of the workpiece.

The present applicant has developed a tailstock device for a precision lathe, and has filed Japanese Utility Model Application No. 2-632 prior to the filing of this application.
No. 11 (see Japanese Utility Model Laid-Open No. 4-023203). The tailstock apparatus has a tailstock arranged on a lathe bed, and the tailstock is used by fixing the tailstock on a lathe bed at an arbitrary position from an end face of a lathe spindle. Are projected to form a bed portion, and the lower surface of the tailstock frame is projected to form a convex portion, and a space is formed between the side surface of the bed portion and the side surface of the convex portion, A side surface of the convex portion is formed in a tapered surface, and a tapered gib having a tapered surface that is in pressure contact with the tapered surface is slidably mounted in the space, and the convex portion is pressed against the bed portion through the tapered gib. The tailstock is fixed on the lathe bed in a fixed state. The tailstock device is used by placing a tailstock on a lathe bed, fixing the tailstock on a lathe bed at an arbitrary position from the end face of the lathe spindle, and projecting the upper surface of the lathe bed. The lower surface of the frame of the tailstock is formed so as to protrude so as to be inserted between the inner surfaces of the respective bed portions so as to be inserted between the inner surfaces of the respective bed portions. Both end surfaces are formed as tapered surfaces, and tapered gibs are slidably mounted in two spaces formed by the inner surface and the side end surfaces, respectively, and the convex portions are formed on the inner surface through the respective tapered gibs. The tailstock is fixed on the lathe bed in a press-contact state.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an outer peripheral part of a cylinder part of a shaft part with respect to an assembly part comprising a relatively rotatable shaft part and a setting mounting part. This is to cut the lead on the surface. The setting mounting part is fixed with the chuck of the jig table provided with the reference block, and the chuck of the jig table is temporarily stopped before the kelepin provided on the spindle. The cylinder portion is rotated so as to align with the engagement hole formed in the cylinder portion of the shaft portion, and then the chuck is advanced to engage the kelepin with the engagement hole, and apply an axial thrust to the cylinder portion. High-precision lead processing by improving the processing accuracy by cutting the reference surface on the end face of the cylinder part and cutting the lead on the outer peripheral surface of the cylinder part by applying only the rotation force without applying force and rotating To Ukoto is to provide a cutting device and a cutting method capable.

According to the present invention, a headstock is rotatable to give a rotational motion to the cylinder portion in an assembly part comprising a shaft portion to which the cylinder portion is fixed and a setting mounting portion relatively rotatably mounted to the shaft portion. A main shaft attached to the main shaft, a crest pin which is attached to the main shaft and engages with an engagement hole formed in the cylinder portion of the assembly component, and a reference which abuts a longitudinal reference surface formed in the setting mounting portion of the assembly component. A jig table provided with a block and a chuck having a chuck claw for holding and fixing an outer peripheral surface of the setting mounting portion, and a jig table arranged axially opposite to the headstock; A tool post table interposed and attached to a bed, a first tool post fixed to the tool post table and having a first tool for cutting a reference surface on an end face of the cylinder portion; Second that reciprocates fitted with second tool for cutting a lead to the outer peripheral surface of the fine the cylinder portion
A jig stand having a through hole fixed to the bed, a tail stock having a through hole, a sleeve slidable through the through hole of the tail stock and holding the chuck, and a tail; A working cylinder attached to a stock, a rod having a piston attached to the end of the sleeve and reciprocating in the working cylinder, and capable of stopping axial movement of the rod halfway and changing the stop position. The present invention relates to a cutting device having stopper means.

The present invention also relates to a chuck having an assembly part comprising a shaft part to which a cylinder part is fixed and a setting part to be rotatably mounted on the shaft part, wherein the setting part is provided on a jig base. The chuck of the jig table supporting the assembly part is stopped once before a spindle that is rotatably mounted on a headstock that is axially opposed to the jig table and that is held by the jig table. The kelepin provided on the main shaft is aligned with the engagement hole formed in the cylinder part of the assembly part, and then the chuck of the jig base is moved toward the main shaft to engage the kelepin with the engagement hole. Without applying thrust in the axial direction to the cylinder part of the assembly part, by applying only a rotational force through the kelepin of the main shaft to rotate the cylinder part, and a tool post on the end face of the cylinder part. The reference surface is cut by a first blade mounted on the table, and then the second blade mounted on the tool rest table is reciprocated according to the cut reference surface, thereby forming an outer circumferential surface of the cylinder portion. The present invention relates to a cutting method including cutting a lead.

Since the cutting apparatus and the cutting method are configured as described above, the end face processing and the lead processing as the reference plane of the product can be processed on the same machine of the NC table, and both the processing surfaces can be processed. The positional relationship always coincides without adjustment, and high-precision machining accuracy can be ensured. In holding the shaft, no axial thrust is applied to the shaft in the axial direction. Can be adjusted with the alignment of the engagement holes formed in the cylinder part close to each other.
Position adjustment can be achieved easily and reliably.

[0012] In addition, the rotation of the shaft portion is performed by rotating the shaft portion by engaging a kelepin rotated by the main shaft rotatably provided on the headstock with an engagement hole of the cylinder portion. No thrust acts on the part and only rotational force is applied, which does not affect the machining accuracy in the axial direction. No axial thrust is applied to the shaft portion, and only the vertical pressing force acts to hold the shaft portion. Similarly, no thrust acts on the shaft portion and only rotational force is applied. And does not affect the machining accuracy of the shaft portion with respect to the cylinder portion in the axial direction.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting apparatus and a cutting method according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the cutting apparatus according to the present invention, FIG. 2 is a plan view of the cutting apparatus shown in FIG.
1 is a side view of the cutting device of FIG. 1, FIG. 4 is a front view of a main portion of the cutting device of FIG. 1, FIG. 5 is a cross-sectional view of a main portion of the cutting device of FIG. FIG. 7 is a sectional view of a jig table of the cutting apparatus of FIG.
7 is a plan view of the jig stand of FIG. 7, and FIG. 9 is a side view of the jig stand of FIG.

[0014] As shown in FIG.
This is for cutting the assembly component 1 including the shaft portion 5 to which the cylinder portion 6 is fixed and the setting mounting portion 7 which is mounted on the shaft portion 5 via a bearing 22 so as to be relatively rotatable. Specifically, in this cutting apparatus, the cylinder 6 of the assembly 1 is a cylinder of an 8 mm VTR, and the end 23 of the cylinder 6 performs a radial cutting on a surface serving as a reference surface of the product. Further, a lead serving as a tape running guide is cut on the outer peripheral surface 24 of the cylinder portion 6. Further, this cutting device is provided with an automatic opening / closing door, a coolant device, and an NC device, but their description is omitted here.

[0015] This cutting apparatus is equipped with a bed 1 on a machine base 11.
0 is fixed, the headstock 4 is mounted on the bed 10, and the jig base 2 is mounted on the bed 10 so as to face the headstock 4. A table base 13 is mounted on a bed 10 between the headstock 4 and the jig table 2. The spindle 3 is mounted on the headstock 4 so as to be driven and rotated by a spindle motor 21. The bed 10 is provided with a Z-axis motor 19 for moving the table base 13 in the axial direction, that is, the Z-axis direction. Therefore, table base 1
3, a sliding motion is given from the end of the bed 10 by the operation of the Z-axis motor 19. The sleeve 12 serving as a shaft is attached to the tail stock 17 constituting the jig base 2 so as to be able to reciprocate, and the tapered portion 33 of the chuck 20 is inserted and attached to the attachment hole 34 of the sleeve 12 (FIG. 7). ). A technique for aligning the rotation center of the spindle 3 attached to the headstock 4 with the rotation center of the cylinder part 6 of the assembly 1 attached to the jig stand 2 is disclosed in, for example, Japanese Utility Model Application Laid-Open No. 4-02232.
The technology of the tailstock device disclosed in Japanese Patent Publication No. 03 is applicable,
In this case, the lathe spindle of the tailstock device corresponds to the spindle 3 of the present invention, and the tailstock of the tailstock device corresponds to the jig stand 2 of the present invention.

The tool rest table 14 on the table base 13 disposed between the jig stand 2 and the spindle 3 has a tool 16 for cutting a reference surface on a radial surface, that is, an end surface 23 of the assembly 1. Is mounted on the tool rest 8. An X-axis motor 18 for moving the tool rest table 14 in a direction orthogonal to the axial direction, that is, in the X-axis direction, is mounted on the table base 13. Therefore, the tool rest table 14 can slide on the table base 13 by the operation of the X-axis motor 18. Further, the tool rest table 14 is provided with a tool rest 9 having a reciprocating slide having a tool 15 for cutting a lead mounted on the outer peripheral surface 24 of the cylinder portion 6 and a servo motor 19 for reciprocating the tool rest 9. Have been. As the tool rest 9 having a reciprocating slide, for example, the tool rest apparatus for lead machining disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2-180503 and an NC lead machining apparatus using the tool rest apparatus can be applied.

In this cutting apparatus, the main shaft 3 causes the cylinder portion 6 of the assembly part 1 to rotate, and the main shaft 3 is provided with a knurled face plate 26. The knurled face plate 26 is located at a position eccentric from the rotation center of the spindle 3
One or a plurality of kelepins 25 are detachably fixed. The knurled pin 25 is inserted into the engagement hole 30 which is a drive hole formed in the cylinder portion 6 of the assembly component 1 with a gap, and engages with the engagement hole 30 in a detachable manner. The rotation of the main shaft 3 is transmitted to the knurled face plate 26, and the rotation of the knurled face plate 26 causes the knurled pin 25 to be eccentric from the center of rotation and rotates in a predetermined circular motion. Accordingly, since the kelepin 25 is engaged with the engagement hole 30 of the cylinder part 6 of the assembly part 1, when the setting mounting part 7 is fixed to the chuck 20, the kelepin 25 presses the cylinder part 6 in the axial direction. That is, only the rotational force acts without the thrust being applied to the cylinder portion 6 and the cylinder portion 6 rotates with respect to the setting mounting portion 7.

The chuck 20 attached to the jig table 2 has
Longitudinal reference surface 2 formed on setting attachment portion 7 of assembly component 1
8 and a chuck claw 32 for holding and fixing the outer peripheral surface 31 of the setting mounting portion 7. The outer peripheral surface 31 of the setting mounting portion 7 is a reference surface serving as a radial processing reference. The jig base 2 has a tail stock 17 having a through hole 29 fixed on the table base 13.
A sleeve 12 for holding a zero at one end is slidably mounted. The sleeve 12 is configured to slide in the axial direction in two stages from the tailstock 17 toward the main shaft 3 and extend therefrom. That is, the shaft of the sleeve 12 is configured to wait at an intermediate position in the axial movement, and at that position, as will be described later, the kelepin 25 attached to the main shaft 3 and the cylinder portion of the assembly 1 attached to the jig base 2. 6, the shaft or sleeve 12 is further extended so that the engagement hole 30 is engaged with the kelepin 25.

A cylinder cover 50 is mounted on the jig base 2, and a sleeve 12 is provided in the cylinder cover 50.
An operating cylinder 35 for operating the lever 39 and a working cylinder 40 for operating the lever 39 are arranged. The working cylinder 35 is attached to a cylinder support 54 fixed to the tailstock 17, and the working cylinder 40 is connected to a bracket 51 fixed to the tailstock 17 by a pivot pin 5.
It is pivoted at 2. A rod 36 to which a piston 37 is attached is fixed to the other end of the sleeve 12. The working cylinder 35 fixed to the tail stock 17 is moved by a piston 37 that reciprocates in the working cylinder 35.
Are divided into two hydraulic chambers 43 and 44. The rod 36 penetrates the working cylinder 35 and the stopper stop hole 48 of the lever 39. The hydraulic chambers 43 and 44 are connected to hydraulic supply paths 45 and 46 for supplying hydraulic pressure through the switching valves 41 and 42. To reciprocate the piston 37 in the working cylinder 35, the switching valve 4
The hydraulic pressure in the hydraulic chambers 43 and 44 acts on the piston 37 to reciprocate the rod 36 by supplying hydraulic pressure to the hydraulic chambers 43 and 44 through the hydraulic supply paths 45 and 46 by switching between the hydraulic chambers 1 and 42. .

A stopper 38 is attached to the jig base 2 to stop the axial movement of the rod 36 halfway. The working cylinder 35 has a lever 3
One end of 9 is pivotally connected by a pivot pin 47. Lever 39
Is formed with a stopper stop hole 48. Lever 39
The rod 36 penetrates the stopper stop hole 48.
The rod 36 is configured to stop when the stopper 38 fixed to the rod 36 comes into contact with a stop 55 around a stopper stop hole 48 formed in the lever 39. The other end of the lever 39 is pivotally connected by a pivot pin 53 to a rod 49 fixed to a piston that reciprocates in the working cylinder 40. Therefore, when the operating cylinder 40 is operated and the rod 49 is extended, the lever 39 is in an inclined state, and the contact position between the stopper 38 and the stopper 55 around the stopper stop hole 48 of the lever 39 is determined by the sleeve. Reference numeral 12 denotes a position for adjusting the position where the chuck 20 is separated from the main shaft 3 by a predetermined distance, and the kelepin 25 attached to the main shaft 3 and the engaging hole 30 of the cylinder portion 6 of the assembly 1 are aligned.

In order to attach the assembly 1 to the chuck 20 and to engage the kelepin 25 attached to the main shaft 3 with the engagement hole 30 of the cylinder section 6 of the assembly 1, the operating cylinder 35 and the operating cylinder 40 are operated as follows. Should be activated.
First, the operating cylinder 35 is operated to make the rod 36 extend from the tail stock 17 to the right side in FIG. 7, and the operating cylinder 40 is operated to extend the rod 49 to move the lever 39 to the stopper 38 side. To the state inclined to. Thus, the chuck claw 32 of the chuck 20 is loosened to remove the cut assembly part, and the unprocessed assembly part 1 is attached to the chuck 20. That is, the reference block 27 provided on the chuck 20 is brought into contact with, ie, pressed against, the longitudinal reference surface 28 of the setting mounting section 7 of the assembly component 1, and the chuck jaws 32 of the chuck 20 are operated in the corresponding contact state to set the mounting section. 7 and the assembly 1 is attached to the chuck 2
Attach to 0.

Then, the cylinder 35 is operated to rapidly feed the stopper 38 fixed to the rod 36 to an intermediate position where the stopper 38 abuts a stop 55 around a stopper stop hole 48 formed in the lever 39. Since the axial movement of the rod 36 and the sleeve 12 is temporarily stopped by the stopper 38 abutting on the stop portion 55, the rod 36 and the sleeve 12 are fixed to the engaging hole 30 formed in the cylinder portion 6 of the assembly 1 and the main shaft 3. The cylinder portion 6 of the assembly 1 is rotated through the bearing 22 with respect to the setting mounting portion 7 so that the snapping pin 25 attached to the snapping face plate 26 is in the engagement position. The position with the kelepin 25 is matched.

When the engagement hole 30 and the knurled pin 25 are aligned and in a position where they can be engaged, the operating cylinder 40 is operated to set the lever 39 up, and the stopper 38 is regulated by the adjusting lever 39. The state is released, the operating cylinder 35 is operated to move the sleeve 12 toward the main shaft 3, and the engaging hole 30 of the cylinder portion 6 is engaged with the snap pin 25.
The operation of the operation cylinder 40 is stopped in a state where the engagement hole 30 is simply engaged with the kelepin 25 and is not pressed, and
The operation of the operation cylinder 35 is stopped, and the assembly 1 attached to the sleeve 12 and the chuck 20 is stopped in the axial direction. When the engagement hole 30 of the cylinder portion 6 is engaged with the snap pin 25, the stopper 38 comes into contact with the stop portion 55 of the adjustment lever 39, and the sleeve 12 cannot move further to the main shaft 3 side. Therefore, the engagement hole 30 and the knurled pin 25 are engaged with the cylinder portion 6 of the assembly 1 without any axial thrust acting on the cylinder portion 6.
When the main shaft 3 is rotated in this state, only the rotational force is applied to the cylinder portion 6. Therefore, the thrust acting on the sleeve 12 of the jig base 2 does not act on the assembly 1 at all when the engagement hole 30 and the snap pin 25 are engaged with each other. Never give.

When the start switch (not shown) is turned on in a state where the kelepin 25 attached to the main shaft 3 is engaged with the engagement hole 30 of the cylinder portion 6, the automatic opening / closing door closes and the operation of the main shaft 3 is started. The motor starts and the main shaft 3 rotates, and the coolant device operates to discharge the coolant liquid to the processing area. Therefore, the cylinder 6 of the assembly 1
The end surface 23 is finished by the cutting tool 16 attached to the tool rest 8 to cut the reference face, and the cylinder face 6 is cut to the reference face at the end face, and then the tool rest 8 is retracted. Next, the lead is cut on the outer peripheral surface 24 of the cylinder portion 6 by the blade 15 attached to the tool rest 9 corresponding to the reference surface. At this time, the rotation speed of the main shaft 3 is converted so that the rotation speed of the cylinder portion 6 becomes the optimum rotation speed for lead machining. While the tool rest 9 is reciprocating, lead processing is performed on the outer peripheral surface 24 of the cylinder portion 6. After the cutting of the lead on the outer peripheral surface 24 is completed, the tool rest 9 is retracted. Therefore, the rotation of the main shaft 3 is stopped and the operation of the coolant device is stopped. The automatic opening / closing door is opened, the sleeve 12 is retracted, the chuck 20 is operated to release the chuck pawl 32, and the chuck 20 is released.
Then, the machined part 1 is taken out from the machine, and the machining is completed.

[0025]

Since the cutting device and the cutting method according to the present invention are constructed as described above, only the rotary motion is given to the cylinder portion of the assembly without the axial thrust acting thereon. In addition, the positioning of the engagement hole formed in the cylinder portion with the kelepin attached to the main shaft can be achieved very easily and reliably. Therefore, a reference surface is provided on the end surface of the cylinder portion by a first tool provided on a first tool rest fixed to a tool rest table attached to a base on the bed disposed between the jig stand and the spindle. When the lead is cut on the outer peripheral surface of the cylinder portion with the second tool provided on the second tool rest attached to the tool rest table, the machining accuracy in the axial direction of the cylinder is affected. Thus, high-precision end face processing, that is, reference surface processing, and high-precision lead processing of the outer peripheral surface can be performed on the cylinder portion. Moreover, the processing of the end face of the cylinder portion serves as the reference surface of the product, and lead processing can be performed based on the processing of the end face of the reference surface, and both processing can be performed on the same tool post table. Completely match without adjusting the positional relationship between end face processing and lead processing.

In addition, this cutting apparatus performs cutting as an assembly part in which a shaft part fixed to a cylinder part and a setting mounting part mounted to the shaft part so as to be relatively rotatable are assembled. The machining error of each part does not become a cumulative error, and the machining accuracy is improved. Therefore, if the assembled part is, for example, an 8 mm VTR cylinder, it will be subjected to final finishing as a cylinder in use, and no cumulative error will appear in the product.
The positional relationship between the rotary head assembled on the basis of the product and the cylinder portion subjected to the lead processing becomes highly accurate, and a highly accurate product can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a cutting apparatus according to the present invention.

FIG. 2 is a plan view of the cutting apparatus of FIG. 1;

FIG. 3 is a side view of the cutting apparatus of FIG. 1;

FIG. 4 is a front view of a main part of the cutting apparatus of FIG. 1;

FIG. 5 is a sectional view of a main part of the cutting device of FIG. 1;

FIG. 6 is a side view of the main shaft side of the cutting apparatus of FIG. 1;

FIG. 7 is a sectional view of a jig table of the cutting apparatus of FIG. 1;

FIG. 8 is a plan view of the jig stand of FIG. 7;

FIG. 9 is a side view of the jig stand of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Assembly part 2 Jig stand 3 Spindle 4 Spindle stand 5 Shaft part 6 Cylinder part 7 Setting mounting part 8 Turret (1st turret) 9 Turret (2nd turret) 10 Bed 11 Base 12 Sleeve 14 Turret table Reference Signs List 15 blade (second blade) 16 blade (first blade) 17 tail stock 20 chuck 23 end surface (reference surface of cylinder portion) 24 outer surface (outer surface of cylinder portion) 25 kelepin 27 reference block 28 reference surface in longitudinal direction 29 penetration Hole 30 Engagement hole 31 Outer peripheral surface (outer peripheral surface of setting mounting portion) 35 Working cylinder 36 Rod 37 Piston 38 Stopper (stopper means) 39 Adjustment lever (stopper means) 48 Stopper stop hole (stopper means) 55 Stopper section (stopper means) )

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23B 5/00

Claims (2)

(57) [Claims] 1. A in order to impart rotational motion to the cylinder portion in the assembly consisting of the relatively rotatably mounted setting attachment portion to the shaft portion and the shaft portion fixed to the cylinder portion
Rotatably mounted spindle on the main bearing base, Kerepin that engages with the engaging hole formed in the cylinder portion of and the assembly mounted on the spindle, longitudinally formed in the setting attachment portion of the assembly Reference block that abuts the reference surface
Chuck for fixing by clamping the outer circumferential surface of the front Symbol Set mounting portion when
A chuck having a claw and an axial direction on the headstock.
A jig table, which is disposed opposite to the tool table, which is disposed between the jig table and the spindle, and which is attached to the bed;
The first with the first blade to cut the reference surface on the end face
A lead is cut on the turret and the outer peripheral surface of the cylinder.
A second tool rest that reciprocates fitted with second tool for engineering, the jig table, the tail stock with a fixed through-hole on the bed, sliding in the through-hole of the tailstock A rod capable of holding the chuck, a working cylinder mounted on the tailstock, a rod mounted on an end of the sleeve and reciprocating in the working cylinder, and an axial direction of the rod; A cutting device comprising a stopper means for stopping the movement of the workpiece midway and changing the stop position. 2. A phase to the shaft portion and the shaft portion fixed to the cylinder portion
Cha provided the setting mounting portion in assembly comprising a setting mounting portion mounted for pairs rotate on a jig base
In front of a spindle that is held by a lock and is rotatably mounted on a headstock that is axially opposed to the jig table.
The chuck of the jig table supporting the assembly
Stop once, and attach the assembling part to the
Product is aligned with the engagement hole formed in the cylinder part,
Next, the chuck of the jig table is moved to the spindle side.
It was engaged with the Kerepin the engaging hole by, without causing axial thrust on the cylinder portion of the assembly
Giving only the rotational force through the Kerepin the serial spindle rotates the cylinder portion, the reference surface is machined by a first tool installed in the tool rest table on the end face of the cylinder portion, then cutting processed the reference The lead is cut on the outer peripheral surface of the cylinder portion by reciprocating a second cutter installed on the tool rest table according to the surface .
Cutting process consisting that.