JPS60255339A - Head replacing apparatus in turret type machine tool - Google Patents

Abstract

PURPOSE:To improve the damping effect on receiving and delivering by holding a projection formed onto a turret head by a clamping piece spring-urged to a body side in the receiving seat of a supporting arm and releasing the clamping by an unclamping mechanism at a replacement position. CONSTITUTION:A turret head 11 which has been used is shifted with a holder not shown in the figure to a replacement position 20, and the projection 21 of the head 11 is inserted into a penetration hole 23b on the receiving seat 23 of a vacant supporting arm 5, and said projection 21 is caught by a clamping piece 24. The collision with the arm 5 accompanied by the shift at this time is absorbed by a spring 22. Then, the clamp of a head holder not shown in the figure is released, and the holder is retreated, and the turret head 11 in stock state is selected and shifted to the replacement position 20, and the clamping piece 24 is pushed and spread by an unclamping driving source 26. Therefore, the receiving seat 23 is press-attached onto the head, by the spring 22, and the turret head 11 is certainly installed. Therefore, the damping performance on replacement can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a head changing device for a turret type machine tool.

The applicant has previously proposed a head magazine equipped with a plurality of support arms that grip the turret head in a radial manner on the side of the machine tool body to which the turret head has been attached, and which is equipped with a turret head. A device in which any one of the support arms can be selected to a predetermined exchange position, and the turret head can be exchanged between the support arm selected to the exchange position by moving the main body to the exchange position. However, in this case, if a clamp mechanism including a drive source for removably gripping the turret head was placed on each support arm, the weight of the support arm would increase, and the index provided in the head magazine would increase. When the mechanism moves the index to the exchange position, the position stop becomes inaccurate, so it is desirable to reduce the weight of the Franz mechanism.
Also, since the head is replaced by moving the main body toward the replacement position, it is desirable to provide a buffer mechanism in the grip of the support arm.

The object of the present invention is to provide a mounting W that meets the needs of the above, and includes a protrusion for connecting the turret head with the support arm on the opposite side of the surface connecting the turret head to the machine tool body. A seat for the turret head which can be fully inserted into the platform support arm and biased toward the main body by a spring, and a clamp piece for gripping the projection on the back side of the seat. 1. The clamp piece is always biased toward the closed side by a spring, and the replacement position is 1. The clamp piece on the selected support arm is pressed to the open side against the spring. Consisting of all drive sources for unclamping.

The present invention will be described below with reference to the illustrated embodiments.

With reference to FIGS. 1 and 2, (1) is a machine base, (2) is a workpiece W setting table provided at the front position on the machine base (1),
(3) shows the machine tool main body installed behind it, and (4) shows a spatula 1 magazine equipped with a plurality of support arms (5) radially arranged on the side of the machine tool main body (3). The machine tool body (3) has a fixed rail (6a) on the machine base (1).
is slid in the lateral direction by the operation of the drive source (6b) along n
a table (6), a column (7) that slides in the front-rear direction along a rail (7a) fixed on the table (6) by the operation of a drive source (7b), and the column (7). It is equipped with a movable frame (3) that slides in the vertical direction along a rail (8a) fixed to the frame by the operation of a drive source (8b),
A turret head Qi having a plurality of spindles θ0 around the movable frame (8) is attached via a head holder (9), and a driving source (
6a), (7a), and (8a) to prevent movement in the three axes of the orthogonal coordinate system.

Further, as shown in FIGS. 3 to 5, the head holder (9) is fully equipped with a horizontal index shaft (2) and a drive shaft α inserted into the index shaft. The index shaft α2 is connected to a drive source (12a) such as a serze motor through a worm gear mechanism, and the drive shaft α9 is connected to a spin Ple motor (13a) through a gear train. A connecting shaft (
) is installed as a shaft on the side of the turret spatula)'Ql),
When the turret head αυ is attached to the index shaft), the connection shaft (a) is engaged with the drive shaft α to prevent rotation, and each spindle motor (13a) is connected to the spindle motor (13a). Furthermore, the turret spatula Pαb is attached to and detached from the index shaft (2) by means of a positioning pin provided on the seat and a flange member Q7). The drive source (12a) provides index rotation by K to freely position and fix the position of each spindle OQ.
was directed toward the workpiece W on the above-mentioned cera)-e(2).

The head magazine (4) also has a plurality of radially extending support arms (5) fixed to an index axis 0 which is mounted on a pedestal on the machine base (1) as shown in FIGS. 6 and 7. A drive source 09 such as a serze motor connected to the index shaft 0 via a gear train causes any one of the support arms (5) to be replaced within the lateral movement locus of the head holder (9). The support arm (5 and The turret head α℃ is replaceable.

Here, according to the present invention, the turret head (1υ is configured to have a protrusion @1 for connection with the platform support arm (5) on the side opposite to the connection surface with the main body (3), The protrusion Qυ can be fully inserted into the base support arm (5), and the main body (3)
The turret head is biased by a spring (a) on the side.
A catch seat (A) and a clamp piece (C) for gripping the protrusion f2υ are provided on the back side of the catch seat (C), and the clamp piece (C) is always attached to the closed side with a spring (A). An unclamping drive that presses the clamp piece on the support arm (5) against the spring (B) button and presses it to the open side when the replacement position (A) is selected. It places the source (a).

This will be described in detail with reference to the illustrated VC.As shown in FIG. The cylindrical part (23a
) shall be fitted and supported at the cylindrical portion (23
a) f The cylindrical part (5a) is prevented from rotating by a bottle handle and is slidable against the spring, and the turret head α is inserted into the through hole (23b) provided in the catch seat (a). ]] protrusion 6
! 1) can be inserted and removed freely.

In addition, the clamp pieces (goods) are prepared in a pair on the left and right on the back side of the catch seat, and both the clamp pieces (c) are attached to the cylindrical part (5a) at the base axis (24aH24a). Both clamp pieces (goods) +2.41 are pivoted in common to the operating rod (24b) extending to the rear of the cylinder portion (4a) at the operating ends bent inwardly from the roots thereof. (to force the operating rod (24b) backward)
Through the rod (24b) and through the both Runtz pieces @
(c) is always biased toward the closing side, and the projection 121) of the turret head aυ is
3b) and push the head 01) together with the catch He against the spring wire, the tapered part of the tip of the protrusion (2) will push both clamp pieces (c). (c) Kabane (
11 The protrusion Q1) is gripped by both clamp pieces (c) (c) at the stepped portion at the tail end of the tapered portion.
It was to so.

Further, the unclamping drive source (a) consists of a hydraulic cylinder (26a) fixed to the bracket (IM) fixed to the support, and the piston rod (26a) of the cylinder (26a)
26b) is placed in a position opposite to the operating rod (24b) on the support arm (5) which is selectively moved to the exchange position sheath, and when the piston rod (26b) is advanced, the rod (26b) 24b) When pushed against the cover spring (a), both land pieces (c) open.

In the drawings, the ridge indicates a pin provided on the protrusion side of the turret head to prevent rotation of the catch.

Next, its operation will be explained.

Used turret head 01J of turret type machine tool
is mounted on the head holder (9) and moved laterally toward the replacement position by the operation of the drive source (6b), and by this lateral movement, the replacement position ω is preliminarily moved. The through hole (23) of the seat (c) of the empty support arm (5) waiting for
b) Insert the protrusion @ of the head 01) and grip the protrusion (211'(r) with the clamp piece (goods),
At this time, the impact on the support arm (5) due to the lateral movement of the head holder (9) is absorbed by the spring (A). Next, the clamp of the flange member αη of the head holder (9) is released, the head holder (9) is slightly moved away from the replacement position (4), and the head magazine (4) is replaced by the drive source α. After selectively moving one of the turret heads (b) stocked in the magazine (5) to the replacement position, the head holder (9) is moved to the replacement position.
At the same time, when the unclamping drive source (A) is activated and the clamp piece (C) of the support arm (5) is opened against the spring (■), the support arm (5) is opened. Since the turret head αυ is biased toward the head holder (9) by the spring (A), the index shaft (2) of the head holder (9) is firmly attached to the seat. The flange member (
171, the turret head 01) is roughly ramped, and the drive source (6b) returns the head holder to its old position, ready for the next machining operation.

As described above, the present invention has a turret head seat which allows the protrusion of the turret head to be inserted into each support arm and which is biased by a spring toward the machine tool main body, and a seat on the back side of the seat. A clamp piece for gripping the protrusion is provided, and the clamp piece is always biased toward the closed side by a spring.1. An unclamping drive source is disposed at a predetermined replacement position to suppress the clamp piece on the support arm selected from the above to the opening side against the spring, and the unclamping drive source By arranging the support arms separately from the support arms, the weight of each support arm is reduced.Not only can the head magazine's indexing mechanism accurately stop its position when indexing to the replacement position, but the turret Is the catch of the head a spring? ) Since the turret head is biased toward the main body side, the turret head can be transferred smoothly and reliably by exhibiting a buffering effect.

[Brief explanation of the drawing]

Fig. 1 is a side view of an example of the embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a plan view taken along the line ■-■ in Fig. 1, and Fig. 4 is a side view taken along the line IV--IV. Fig. 5 is a front view of the turret head as seen from the direction of the connection axis, Fig. 6 is a front view of the head magazine as seen from the index axis direction, Fig. 7 is a partially cutaway side view, and Fig. 8 is at the replacement position. FIG. 3 is a cutaway plan view of a portion of the support arm. (3)...Machine tool body (4)...Head magazine (5)...Support arm αη...Turret head (4)...Replacement position Ql)...Protrusion (A)...・
Spring for the catch (E)...Catch (Foundation) (Foundation)...Clamp piece (2)...Spring for the clamp piece (E)...Third drive source for Ancranzo! ! ! 14 8a 44! ! l

Claims (1)

[Claims] A head magazine equipped with a plurality of support arms that removably grip the turret head is arranged radially on the side of the machine tool body to which the turret head is attached. The turret head can be selectively moved to the exchange position of the main body, and the turret head can be exchanged between the support arm selected for the exchange position by moving the main body toward the exchange position, and the turret head is interchangeable with the main body. The turret head is configured to have a protrusion for connection with each of the support arms on the side opposite to the connection surface, the protrusion can be freely inserted into each of the support arms, and the turret head is biased by a spring toward the main body. A seat and a clamp piece for grasping the protrusion are provided on the back side of the catch seat, and the clamp piece is always biased toward the closed side by a spring, and the clamp piece is placed on the supporting arm when the coughing and coughing position is selected. A head changing device for a turret type machine tool, characterized in that an unclamping drive source is arranged to push the clamp piece toward the opening side against the spring.