JPH0751226Y2 - Automatic tool changer for machining center - Google Patents

Description

[Detailed Description of the Invention] A. Industrial Application Field The present invention relates to an automatic tool changer for a machining center.

B. Outline of the Invention The present invention is an automatic tool changing device for a machining center, which is equipped with a tool pushing mechanism including a tool holder pushing device and a tool pushing device, thereby facilitating replacement with an external tool.

C. Conventional technology Machining centers often perform unattended and complex machining for long periods of time, so the tool change to the spindle is performed automatically by an automatic tool changer. However, when replacing a tool whose life has expired or a tool that is not suitable for the purpose of machining with a new tool or another tool suited for the purpose of machining, that is, an external tool, it is either by the operator's hand or a tool replacement provided separately. I used a mobile robot.

D. Problems to be solved by the invention There are various types of automatic tool changer,
In each case, since the tapered shank portion of the tool is fitted in the tapered hole of the tool holder, a large pulling force is required to pull out the tool from the tool holder. In order to replace the tool housed in the automatic tool changer with an external tool, first the tool housed in the automatic tool changer must be removed, but if it is done manually, the workability is not good. Of course, from the viewpoint of ensuring safety, the machining center must be stopped to stop the machining.In addition, even if a mobile robot for tool exchange is used, the tool cannot be removed due to insufficient pulling force and the machining center must be stopped. I often stopped processing.

E. Means for Solving the Problem A tool pushing mechanism in which an automatic tool changing device is integrally attached to a mounting frame with a pushing device for a tool holder including a pushing air cylinder and a pushing plate, and a pushing device for a pushing air cylinder. To provide.

F. Action The tool holder pressing device presses and fixes the tool holder,
The tool pushing device pushes the tool out of the tapered hole of the tool holder.

G. Embodiment One embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view of an automatic tool changer provided on the back surface of a machining center, and FIG. 2 is a sectional view taken along the line I--A in FIG.

In FIGS. 1 and 2, 1 is a tool holder for holding a tool 2, and in this example, 22 tool holders 1 are arranged in an oval shape. Reference numeral 3 is a cover, 4 is a frame, 5 is a tool exchanging portion for the spindle, and 6 is an exchanging portion for an external tool. Reference numeral 7 is a roller provided on each of two insides of the front and rear surfaces of the tool holder 1, 8 is a guide plate fixed to the frame 4 via mounting legs 9, and 10 is a moving surface of the tool holder 1 provided on the frame 4. When the tool holder 1 moves on the upper side 3a of the oval in FIG. 1, the roller 7 rolls on the moving surface 10 and when the lower side 3b of the oval moves, the roller 7 is a guide plate. Roll over 8. Reference numeral 11 denotes a chain, and the tool holder 1 is mounted between the connecting pins 12 of the chain 11, and the tool holder 1 also moves as the chain 11 moves. Reference numeral 13 denotes a pressing air cylinder for pressing and fixing the tool holder 1 to the moving surface 10, which is mounted on the mounting frame 14 and has a pressing plate 15 at the tip of the output shaft. The pressing plate 15 is provided with a guide pin 17 slidably fitted with a pin guide 16 provided on the mounting frame 14 in order to prevent rotation around the output shaft. 18 is tool 2
Air cylinder for pushing out
The tool 2 is pushed out of the tool holder 1 by pushing the end portion of the taper shank 2a of the tool 2 which is attached to the mounting frame 14 in the same manner as 13 and is fitted in the taper hole 1a of the tool holder 1 by the output shaft 19.

H. Effect of the invention The tool pushing mechanism, in which the tool holder pushing device consisting of the pushing air cylinder and the pushing plate, and the pushing device consisting of the pushing air cylinder are integrally attached to the mounting frame, is the main spindle of the automatic tool changing device for machining centers. Since it can be provided at any indexing position except for the tool exchange position, the most suitable position can be selected and attached in consideration of workability.

In addition, when exchanging with an external tool, a large pulling force for pulling out the taper shank portion of the tool is not required, and the tool can be easily pulled out from the tool holder,
Tool change work is completed in an extremely short time, and external tool change during machining work is possible.

Also, when using a mobile robot for tool change,
It is no longer possible to remove the tool from the tool holder due to insufficient pulling force and stop the machining center to interrupt the machining.

In this way, if external tool exchange by a mobile robot for tool exchange can be reliably performed without failure, the number of accommodated tools and the number of types of tools can be increased by controlling by combining with an automatic tool changer at an adjacent machining center. The tool management can be rationalized, and the tool management can be rationalized by connecting the automatic tool changer of multiple machining centers together and controlling them collectively. Is.

[Brief description of drawings]

FIG. 1 is a front view of an automatic tool changer provided on the back surface of a machining center showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line I--A in FIG. 1 ... Tool holder, 2 ... Tool, 6 ... Tool pushing mechanism, 13
… Pressing air cylinder, 14… Mounting frame, 15… Pressing plate, 18…
Air cylinder for extrusion.

Claims (1)

[Scope of utility model registration request] 1. A frame having an oval moving surface, a plurality of tool holders arranged along the moving surface of the frame so as to be movable by a chain, and a tool for exchanging tools with a spindle at a specific position. An external tool exchanging part for exchanging an external tool with an exchanging part and a tool exchanging part other than the position of the tool exchanging part with the spindle, and the tool holder is attached to a fixed frame at the position of the external tool exchanging part and the frame is moved. A tool holder pressing device composed of a pressing air cylinder that presses and fixes the surface side,
An extruding device consisting of an air cylinder for extruding the tool from the tool holder by pressing the end of the taper shank of the tool that is attached to this mounting frame and fitted to the tool holder,
A guide plate fixed to the moving surface of the frame via mounting legs to guide the tool holder, and a roller arranged between the guide plate and the moving surface of the frame and pivotally mounted on the tool holder to guide the tool holder. An automatic tool changer for machining centers, which is equipped with.