JPH0642046U - Turret cooling mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] A tool post with a cooling mechanism that prevents thermal displacement by suppressing the temperature rise due to pressure oil in the tool post that clamps and unclamps the turret with a hydraulic cylinder piston member. provide. [Structure] A groove in the axial direction 9a is provided outside the hydraulic cylinder 14 of the tool rest body 9, and a spiral cooling groove 16a is provided in the groove 9a.
The housing 16 having the above is fitted, the cutting fluid is sent from the flow path 22 to the cooling groove 16a, and the hydraulic cylinder 14 is cooled from the outside while being sent to the nozzle side from the flow path 24 to suppress the oil temperature rise due to the pressure oil. , Prevent thermal displacement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool post cooling mechanism for clamping and unclamping a turret by hydraulic pressure.

[0002]

[Prior art]

 Conventionally, a tool post of a lathe has a hydraulic cylinder 102 inside a main body 101 as shown in FIG. 4, and a piston 105 is fitted on a turning center shaft 104 of a turret 103 to switch pressure oil supplied from the outside. Then, the turret 103 was moved in the axial direction to perform clamp / unclamp when indexing. On the other hand, the cutting fluid supplied from the outside passes through the pipe 106 in the central axis of rotation through the joint 106 and is sent out from the radial holes 103a provided in the turret.

[0003]

[Problems to be solved by the device]

 The hydraulic turret clamping / unclamping mechanism described in the prior art supplies high-temperature working oil whose temperature has risen due to hydraulic pump loss, etc. Therefore, there was a problem that the processing accuracy was adversely affected. The present invention has been made in view of such problems of the conventional technology, and an object thereof is to suppress the temperature rise of the tool rest due to the hydraulic oil by the cutting fluid to prevent the machining accuracy from being deteriorated due to the thermal displacement. It aims to provide a cooling mechanism for a turret that can be reduced in number.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the tool post cooling mechanism in the present invention is a tool post that clamps and unclamps a turret by a hydraulic cylinder piston member, and has a spiral groove for cooling the outer circumference of the hydraulic cylinder in the tool post body. A housing having the same is provided, and a flow path for flowing a cutting fluid is provided in the groove in the tool rest main body.

[0005]

[Action]

 The temperature rise around the hydraulic cylinder of the turret caused by the high temperature pressure oil fed into the hydraulic cylinder for the turret clamping / unclamping operation supplies the cutting fluid used during cutting through the spiral groove of the housing. By doing so, the hydraulic cylinder is cooled from the outside to suppress temperature rise and prevent thermal displacement.

[0006]

【Example】

 Embodiments will be described below with reference to the drawings. In the lathe shown in FIG. 1, a headstock 2 is installed on the left side of a bed 1, and a chuck 4 is fitted to the tip of a spindle (not shown) rotatably supported by the headstock 2. The bed 1 has two sets of upper and lower Z-axis guides. A tailstock 5 is movably mounted on the lower Z-axis guide, and a center 7 can be attached to and detached from the tip of the tailstock shaft 6. Is attached to. On the other hand, a saddle (not shown) is movably mounted on the Z-axis guide on the upper side of the bed 1, and the tool post unit 8 can be moved and positioned on the X-axis guide provided on the saddle. It has been placed.

As shown in FIG. 3, the turret unit 8 has a turret 11 fixed to the tip of a turning center shaft 12 which is rotatably and axially movably supported by a turret body 9. A pair of crown tooth-shaped clutches 13A and 13B are fixed to the right end surface of the turret 11. A hydraulic cylinder 14 is bored in the main body 9 concentrically with the turning center shaft 12, and a piston 15 is fitted in the turning center shaft 12. Further, a groove 9a is formed in the main body 9 concentrically with the outer circumference of the cylinder 14 in the axial direction, and a housing 16 having a spiral cooling groove 16a in its center hole is inserted into this groove 9a without any gap.

The main body 9 has flow passages 17 and 18 for pressure oil to the hydraulic cylinder 14, and a flow passage for sending cutting fluid supplied from the coolant pump 21 on the coolant tank 19 to the inlet of the cooling groove 16a. 22 and a flow path 24 that communicates the outlet of the groove 16a with the joint 23 are provided. A cutting fluid pipe 25 is concentrically inserted into the center hole of the swivel center shaft 12, and a pin 20 which is fitted into a joint 23 so as to be movable only in the axial direction of a joint 23 is fitted to the right end of the pipe 25 and is distributed to the left end. The container 26 is fixed. The distributor 26 is rotatably fitted into the center hole of the turret 11 without any gap, and communicates with the outlet of the flow path 27 of the distributor 26 only when indexed to the cutting position in the turret 11. The flow paths 28 are radially provided in the same number as the tool attachment stations.

Next, the operation of this embodiment will be described. Now, pressure oil is supplied to the left chamber of the hydraulic cylinder 14 from the flow path 18, and the clutch 13A is pressed and clamped by the clutch 13B. An electromagnetic switching valve (not shown) is switched by an NC turret indexing command, pressure oil is supplied to the right chamber of the hydraulic cylinder 14 through the oil passage 17, and the turret 11 is moved to the left via the piston 15 and the center axis 12 of rotation. Then, the clutches 13A and 13B separate and become unclamped. Then, after the turret is indexed by a turning indexing mechanism (not shown), pressure oil is again supplied to the left chamber of the hydraulic cylinder 14 and clamped.

Due to this clamping / unclamping operation, the pressure oil sent to the hydraulic cylinder 14 from the hydraulic pump device (not shown) is in a high temperature state due to the loss of the hydraulic pump or the like. Temperature rises. However, when the cutting process is started, the cutting fluid is supplied through the cooling groove 16a provided outside the hydraulic cylinder 14, and the hydraulic cylinder 14 is cooled from the outside, so that heat is applied to the entire tool rest unit 8. It is cooled before it is transmitted, suppressing the temperature rise and preventing thermal displacement.

[0011]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. Since the hydraulic cylinder that clamps and unclamps the turret on the tool post body is cooled from the outside by cutting fluid, it is possible to prevent the oil temperature of the tool post from rising due to pressure oil, which adversely affects machining accuracy due to thermal displacement. To reduce.

[Brief description of drawings]

FIG. 1 is a perspective view of an NC lathe having a tool rest according to the present embodiment.

FIG. 2 is a perspective view of a tool post with a cooling mechanism of the present embodiment.

FIG. 3 is a cross-sectional view of a tool post with a cooling mechanism of the present embodiment.

FIG. 4 is a cross-sectional view of a conventional tool post.

[Explanation of symbols]

9 Turret body 11 Turret 12 Swing center axis 14 Hydraulic cylinder 15 Piston 16 Housing 16a Cooling groove

Claims (1)

[Scope of utility model registration request] 1. In a tool rest for clamping and unclamping a turret by a hydraulic cylinder piston member, a housing having a spiral groove for cooling the outer circumference of the hydraulic cylinder is provided in the tool rest main body, and cutting fluid is flown into the groove. A cooling mechanism for a tool rest, wherein a flow path is provided in the tool rest body.