JPS6179505A - Turret for holding tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a bidirectionally rotatable tool holding turret for use in a lathe as a machine carrier.

BACKGROUND OF THE INVENTION When roughing or finishing machining, lathes need to be strongly coupled and accurately positioned to meet mechanical requirements.

In conventional lathes, when the lathe is in operation, the tool holding member and the platform member are secured to each other by forward engagement. The slider of the turret is provided in the tool holding member and has an end portion that engages more strongly with a spring in a groove formed in the platform member.

Since the end of the slider is engaged with the groove by the spring, the turret has problems as described below.

In other words, on the one hand, in order to strengthen the engagement between the end of the slider and the groove, it is necessary to increase the spring force;
On the other hand, the spring force must be less than the force required to disengage the end of the slider from the groove. Additionally, since the strength of the spring within the turret is determined based on a compromise between these two mutually exclusive conditions, conventional turrets have problems due to the compromise.

[Problems to be Solved by the Invention] An object of the present invention is to provide a turret that improves the conventional turret, has strong coupling, accurate positioning, and solves the above-mentioned problems.

[Means for Solving the Problems] The present invention provides a base member, a tool holding member rotatable within the base member, and a tool holding member rotatable within the base member when a reversibly rotatable motor is rotating. a timer that delays the start of reverse rotation of the motor for a short period of time; a slider that rotates integrally with the tool holding member and is movable in the axial direction; and a slider that engages the base member and the slider. a plurality of notches in the slider; a pin movable radially outwardly from the notches within the platform member and radially attached to the platform member by a guard; symmetrical cam means disposed between said actuation means and said slider for moving said slider in a direction causing said forward engagement means, said cam means terminating in a flat portion; 2! ! at least one symmetrical cam formed on the slider and having a sloped portion of the same type, and a roller that rolls on the cam and is rotatable relative to the member, the member being It is characterized by rotating integrally with the means and moving in the axial direction against the urging force.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in Figure 1, the tool holding turret 1 has a base member 2.
The bottom surface 3 of this platform member 2 is parallel to the horizontal surface 4 of the carriage 5.
Fixed. A tool holding member 6 rotatable around a horizontal XX axis is rotatably provided with respect to the base member 2. This tool holding member 6 includes an annular stage 7 having an X-X axis, and a cylindrical member 8 fixed to the annular stage 7 with a screw 9 and provided coaxially with the X-X axis. . An annular stage 7 is provided forward on the side away from the cylindrical member 8, and a keyway 11 is provided in the center member 10 of the annular stage 7, and a tool holding block (not shown) is fixed to the tool holding member 6. A screw hole 12 is provided for the purpose.

The tool holding member 6 includes a ring 15.1 fixed to the base member 2.
It is rotatable relative to the front bushing 13 and rear bushing 14 held by the bushings 6, respectively.

Since the wall surface 17 of the annular stage 7 is in contact with the wall surface 18 of the ring 15, the tool holding member 6 does not move in the direction of arrow F in FIG. There is. As will be described later, the tool holding member 6 does not move in the opposite direction of the arrow F either.

A ring 19 fixed to the base member 2 and surrounding the circumferential surface of the annular stage 7 is formed with a groove 20 for accommodating a gasket 21, and this gasket 21 engages with the circumferential surface of the annular stage 7, so that the etc., from flowing into the base member 2.

The turret 1 also has an annular actuating means 22 provided on the base member 2, which actuating means 22 is held coaxially with the X-X axis and is connected via ball bearings 23,24 to the
Rotate around the x-axis. The actuating means 22 has circumferential teeth 25, in which a seamless screw 26 rotatably mounted on the base member 2 engages, as shown in FIG. It has one end 26a abutting the member 27a and the other end 26b provided with a tooth-shaped wheel 27b. This wheel 27b is
It is connected via a gear 28 to a motor 29 that can rotate in reverse. When the motor 29 rotates in reverse, it has a timer 30 that delays the start of reverse rotation for a predetermined period of time.

The turret 1 includes a sleeve-type slider 31 that is provided coaxially with the cylindrical member 8 at the rear of the annular stage 7 and is movable with respect to the cylindrical member 8 . This slider 31 rotates integrally with the tool holding member 6 by a pin 32 fixed to the cylindrical member 8. One end 33 of this pin 32 passes through the annular stage 7, so the slider 31 is more firmly fixed to the cylindrical member 8, and the other end 34 of the pin 32 is provided with teeth 34. . Roughly, the turret 1 has a further sleeve-shaped member 35 coaxially disposed on the cylindrical member 8, and this sleeve-shaped member 35
is rotatable and slidable with respect to the cylindrical member 8. Furthermore, this sleeve-shaped member 35 is connected to the actuating means 2
2 and rotates integrally with the actuating means 22 by means of a pin 36.

The front engagement 37 connects the front teeth 38 of the ring 15 and the slider 3.
This is done by interlocking the three front teeth of No. 1.

Another front tooth 40 is formed on the annular stage 7, and the front tooth 3
When the front teeth 9 mesh with the front teeth 38, the front teeth 4° mesh with the front teeth 39, and when the three front teeth and the front teeth 38 disengage, the front teeth 40 and the front teeth 39 disengage.

The slider 31 moves in the direction of arrow F and engages the front
A plurality of springs 41 are provided between the annular stage 7 and the slider 31 in order to remove the
1 is a slider 31 moving away from the annular stage 7.
is being pressed.

Since the slider 31 moves in the opposite direction of the arrow F, that is, toward the annular stage 7, and the forward engagement 37 is performed, the turret 1 moves the three rollers 43 as shown in FIG. It has symmetrical cam means 42 provided therewith. These rows 543 form an angle of 1200 to each other with respect to the XX axis and are mounted with play and rotatably on the radial pivot 44 of the sleeve-shaped member 35. The cam means 42 includes a plurality of symmetrical cams 45 formed on the head of the slider 31 and in contact with the roller 43.
has.

Each cam 45 has two symmetrical steeply sloped portions 46, two symmetrical gently sloped portions 47, and a flat portion 48 of defined width. The sleeve-shaped member 35 is inserted along the X-X axis in the direction of arrow F, that is, forward engagement 3
It is movable in the direction of removing 7 against the biasing means.

This biasing means has two cup springs 51 and 52 with strong spring force.
．． 52 between a block-shaped ring 53 screwed to the free end of the cylindrical member 8 remote from the annular stage 7 and a block 53 that abuts the sleeve-shaped member 35 and forms part of the thrust bearing. , is arranged. vinegar,
The Yapushi 14 surrounds the block 53 and the cylindrical member 8
hold. The sleeve-shaped member 35 has an outer annular end 56 which abuts axially against the actuating means 22, by means of which the tool holding member 6 cannot be moved in the direction opposite to the arrow F.

In order to rotate the tool holding member 6 with the actuating means 22 rotating integrally with the sleeve-type member 35 by means of a pin 36, the sleeve-type member 35 is formed in the head of the sleeve-type member 35 and is connected to the slider 31. Opposing locking part 57
The locking portion 57 has a width determined in the radial direction,
and accommodates the teeth 34. The locking portion 57 is attached to the side surface 6 of the tooth 34.
0.61 and defined by mutually opposing shoulders 58.59, the teeth 34
The tool holding member 6 fixed to one side rotates.

The pin 62, which extends radially with respect to the X-X axis as shown in FIG. because,
In order for the pin 62 to engage or disengage one of the plurality of notches 66 arranged at regular angles with respect to the circumferential surface of the slider 31, the lever 65 is activated by the action of the spring 63 and the electromagnet 64. This is because the pin 62 moves via. The number of notches 66 is equal to the number of rotatable positions of the turret 1.

The pin 62 is slidably mounted on a cylindrical tube 67, which extends transversely to the pin 62 and parallel to the XX axis. This tube 67
is guided in a bore 68 formed in the base member 2, and its axial movement relative to the base member 2 is defined by a shock absorber 69 to which a force is applied. When the pin 62 engages the notch 66, the tube 67 moves the distance necessary to relieve the force, thereby reducing the force applied to the shock absorber 69 so that the tool holding member 6 is not impacted. But it can be decided.

As will be described later, the annular track 71 of the head of the slider 31 is provided with a plurality of axial notches 70 at regular angles, and the number of these notches 70 is equal to the number of rotatable positions of the turret 1. equal.

A block 73 fixed to the ring 15 is provided with a protrusion 72 that protrudes in the axial direction. This protrusion 72 extends into the notch 70 by a distance slightly shorter than the distance traveled by the slider 31. Roughly, the turret 1 includes an electrical means 74 indicating the position of the tool holding member 6 at each rotational angle, and a front engagement member 37 indicating the position of the sleeve-shaped member 35 at each rotational angle with respect to the tool holding member 6. electrical means 75 corresponding to the engagement of. This electrical means 74 has a plurality of angular micro-contacts 76 whose bodies are fixed to the base member 2 and the annular stage 7 . The electrical means 75 includes a microcontact 77 fixed to the base member 2 and a disk 7 coaxially provided to the cylindrical member 8.
8 and has an operating end movable in the X-X axis direction by a bushing rod 79, which bushing rod 7 is housed in a longitudinal groove 80 along the cylindrical member 8. One end 81 of the bushing rod 79 engages the disc 78 and the other end 82 of the bushing rod 79 engages the disc 78 when the sleeve-shaped member 35 is positioned relative to the forwardly engaged 37 tool holding member 6. 6 and comes into contact with a protrusion 83 fixed thereto.

The operation of the member holding turret 1 will be explained below.

The tool holding member 6 operates as described below until the tool holding member 6 is rotated to the desired angle. First electromagnet 64
is energized and the pin 62 separates from the notch 66. next,
The motor 29 is actuated in the direction of rotation of the tool holder 6, so that the tool holder 6 is rotated through the minimum necessary angle, i.e., so that the tool does not come into contact with other parts of the lathe, and the tool holder 6 is is rotated by the desired angle.

The rotation of the motor 29 rotates the actuating means 22 and the sleeve-shaped member 35, and the spring 41 moves in the direction of arrow F, so that the front teeth 39 are disengaged from the front teeth 38 and 40. At the same time, roller 43 rolls on cam 45 and moves off flat portion 48, as shown in FIG. 2, allowing slider 31 to move as described above. When the shoulder 58 abuts the side surface 60 of the tooth 34 or the shoulder 59 abuts the side surface 61 of the tooth 34, the sleeve-shaped member 35 causes the slider 31 to move, resulting in rotation of the tool holding member 6.

When a heavy tool that is unbalanced with respect to the X-X axis is placed on the tool holding member 6, the tool holding member 6 is rotated by a certain angle as described above to switch to a desired position.
Since torque is generated, the tool holding member 6 tends to rotate beyond a certain angle.

At this time, since the head of the protrusion 72 comes into contact with the track 71 between the notches 70, rotation beyond a certain angle is prevented.

When the tool holding member 6 is rotated to a desired constant angle position,
The rotation of the motor 29 is stopped, the seamless screw 26 is stopped by the brake member 27a, and the electromagnet 64 is stopped, so that the pin 62 is moved to the notch 66 corresponding to the new position of the tool holding member 6 rotated by a certain angle. engage.

When the motor 29 stops, the timer 39 operates,
Motor 39 for a predetermined short period of time before motor 29 rotates in reverse.
Reverse rotation is delayed. This delay time is 100 to 300
(milliseconds), and preferably 150 to 200 (milliseconds). Pin 62 is the new notch 6
6, the tool holding member 6 rotates extra due to inertia force, and the tube 67 is pushed into the biased buffer @ position 69.
move against. This extra rotation cushions any shocks even when the tool holding member 6 is moved from one position to a desired position at high speed. Since the guarding device 69 is returned to its original position by the restoring force, extra rotation is stopped and the tool holding member 6 is moved to the desired position.

After retarding the rotation for a short period of time, the motor 29 rotates in the opposite direction as before. Then, the sleeve-shaped member 35 also rotates in the opposite direction,
The locking portion 57 returns to its initial state with respect to the teeth 34, and the roller 33 moves between the steeply sloped portion 46 and the gentle portion 4 of the cam 45.
7 and moves to the flat portion 48, so the slider 31 moves in the opposite direction of the arrow. And tooth 39 is
When engaged with teeth 38 and 40, slider 31 stops. Even after the slider 31 has stopped, the roller 3
6 continues to roll back to its initial position midway through the flat portion 48. At the same time, the sleeve member 35
The cup springs 5o and 51 are compressed by moving in the opposite direction of the operation, that is, in the direction of arrow F. In this state, the forward engagement 37 is completely achieved by the force of the cup springs 50,51.

When the sleeve-shaped member 35 is in this angular position, the protrusion 83 moves the bushing rod 79 so that the electrical means 75 indicate that the forward engagement 37 has taken place and the motor 29 has stopped. Therefore, the turret 1 in which the position of the tool holding member 6 has been changed can be operated.

As explained above, since the slider 31 is moved by the sleeve-type member 35, the front engagement 37 is performed or the front engagement 37 is released. Only when the slider 37 is opened to the position where the forward engagement 37 is performed, the slider 3
1 is connected to the cup spring 5Q via the sleeve member 35.
, 51. When the slope of the cam 45 becomes gentle, the cup spring 50.5
1 is applied quickly. Since the front engagement 37 is performed efficiently in this turret 1, it operates accurately and the engagement force is strong.

According to this turret 1, when the motor 29 rotates in reverse, the reverse rotation of the motor 1 is slightly delayed, so that the turret 1 can operate at high speed without being subjected to impact. This delay causes the forward engagement 37 to take place when the relief device 69 has finished actuating. As explained above, the turret 1 according to the present invention operates reliably and safely.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a turret showing an embodiment of the present invention;
Figure 2 is a detailed view of the turret taken along the line ■-■ in Figure 1, Figure 3 is a detailed view of the turret taken in cross-section along the line ■-■ in Figure 1, and Figure 4 is a detailed view of the turret taken along the line ■-■ in Figure 1. FIG. 2 is a detailed view of the turret taken in section along the line ■-■ in the figure. 2... Base member, 6... Tool holding member, 22. ...
Operating means, 29... motor, 3o... timer, 3
1...Slider, 42...Cam means, 43...
Roller, 45... Cam, 46... Steep slope part, 4
7... Gentle slope part, 48... Flat part,
62...Pin, 66...Notch, 69...Relaxation device. Applicant's agent Patent attorney Takehiko Suzue (procedural amendment form) □ゎ69.2. , J58 Commissioner of the Patent Office Manabu Shiga 1, Display of the case WM 1982-202079, 2, Title of invention 4 Retention Dannod 3, Relationship with the person making the amendment case Patent applicant Idroma Nis B.N. 4. Agent January 29, 1985 6. Subject of amendment

Claims (2)

[Claims] (1) a base member; a tool holding member rotatable within the base member; and an actuating means rotatable within the base member when the reversely rotatable motor is rotating; a timer that delays the start of reverse rotation; a slider that rotates integrally with the tool holding member and is movable in the axial direction; a front engagement means that engages the base member and the slider; and a front engagement means provided on the slider. a plurality of notches movable within the platform member radially outwardly from the notches;
a pin mounted radially with respect to the base member by a shock absorber; and a symmetrical cam disposed between the actuating means and the slider for moving the slider in the direction of effecting the forward engagement means. at least one symmetrical cam formed on the slider, the cam means comprising two types of inclined portions connected to a flat portion;
and a roller that rolls on the cam and is rotatably provided with respect to the member, and the member rotates integrally with the actuating means and moves in the axial direction against the biasing force. A turret for holding tools. (2) The timer sets the start of reverse rotation of the motor to 1
The tool holding turret according to claim 1, wherein the tool holding turret is delayed by 00 to 300 milliseconds.