JPS6140456Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a deburring tool used for robots, manipulators, and other casting deburring machines.
In particular, the present invention relates to a deburring tool designed to improve productivity.

For example, conventionally, with a manipulator for deburring work, the cast burr is first rough-finished using an electric or pneumatic hammer or chipper, and then the finishing work is performed using a grinder attached to the tip of the manipulator. However, when performing rough machining using a hammer or the like and finishing machining using a grinder separately, productivity is limited because it is necessary to pass through the same path where burrs are generated twice.

For example, the grinder device disclosed in Japanese Patent Application Laid-open No. 12690/1983 is an electric grinder with an oscillating structure in its whetstone section, which absorbs the unevenness gaps on the surface of the workpiece and improves the efficiency of polishing work. However, it was not necessarily an advancement in terms of the dramatic improvement in work efficiency that could be achieved by simultaneously performing rough machining with a hammer and finishing machining with a grinder.

Furthermore, Japanese Utility Model Publication No. 37-7998 discloses a grinding device that rotates a scraping tuft instead of a hammer to clean cast burrs, etc., but this is different from conventional grinders. Although it can perform finishing processing to a similar extent, it cannot perform rough processing like a hammer, and even less can perform rough processing and finishing processing in parallel at the same time.

For example, a device that can cut metal pipes and then chamfer them continuously (Jitsukai Sho.
53-43292) is also known, but it is not a useful technique for integrating two rotary operations with significantly different rotational speeds, such as rough machining with a rotary hammer and grinding with a grinder.

Therefore, the present invention rationally arranges a deburring grinder and a hammer tool in one tool, and by interlocking them, rough machining and finishing machining can be performed at the same time with one movement of the tool. The purpose is to improve productivity all at once.
The gist of the tool is that it is a deburring tool used for robots, manipulators, and other work machines for deburring work, and includes a grinder drive shaft connected to a drive source, and a deburring tool attached to the tip of the grinder drive shaft. The present invention provides a deburring tool comprising a grinder and a rotatable hammer device connected to the grinder drive shaft via a speed reduction mechanism.

Next, embodiments embodying the present invention will be described in detail with reference to the accompanying drawings. Here, Fig. 1 is a side sectional view of a deburring machine tool which is an embodiment of the present invention, and Fig. 2 shows the grinder and hammer portion of the same tool, showing the working state when the grinder is worn out. FIG.

In FIG. 1, reference numeral 1 denotes an angle-type grinder, which is crimped onto a fixing nut 4 screwed onto a threaded portion 3 carved at the tip of a grinder drive shaft 2 and a stepped portion 5 of the grinder drive shaft 2. It is clamped and fixed by tightening the nut 4 between it and the receiver 6. The grinder drive shaft 2 is rotatably attached to the frame 7 by two bearings 8a and 8b attached to the frame 7.
Further, this grinder drive shaft 2 has a large diameter bevel gear 9 fixed in the middle, and a small diameter bevel gear 11 screwed onto the tip of a drive shaft 10 disposed at right angles to the grinder drive shaft 2. and a large-diameter bevel gear 9 fixed to the grinder drive shaft 2 are rotatably engaged with each other. The drive shaft 10 is rotatably supported by a bearing 12 attached to the frame 7, and its lower end is connected to a drive electric motor or a drive source rotated by hydraulic pressure, pneumatic pressure, or the like.

The hammer holder 14, which is fixed to the frame 7 by bolts 13, has bolts 1 inside it.
The internal gear 16 has an internal gear 16 and a rotary hammer 27 which are integrally fixed by a grinder 5 and are rotatable via a bearing 18. They mesh together.
The distance between the axis of the grinder drive shaft 2 and the axis of the internal gear 16 and the rotary hammer 27 coaxial therewith is k.
It is eccentric by that amount. The rotary hammer 27 is
a body portion 19 that is an attachment portion to the bearing 18;
a disc-shaped rotating plate 20 that is integral with the body 19;
It is composed of a plurality of hammer tips 21 distributed radially and equiangularly around the outer circumference of the rotary plate 20. The bolts 22 are for fixing the hammer tip 21 to the rotary plate 20.

The ratio of the number of teeth of the internal gear 16 to the number of teeth of the gear 17 on the grinder drive shaft 2 side is, for example, about 4:1, and the rotary hammer 27 is adjusted according to this ratio of the number of teeth.
The rotational speed of the grinder drive shaft 2 is reduced relative to the rotational speed of the grinder drive shaft 2.

Fig. 1 shows a state in which a new grinder is used to remove casting burrs 25 generated on the casting surface 24 of a workpiece 23. When the drive shaft 10 rotates, the rotation is slowed down and transmitted to the grinder drive shaft 2 via the small diameter bevel gear 11 and the large diameter bevel gear 9, and the grinder 1 attached to the tip thereof rotates at high speed. As the grinder drive shaft 2 rotates, the internal gear 16 that inscribed and meshes with the gear 17 of the grinder drive shaft 2 rotates, and the rotary hammer 27 integrated therewith rotates in accordance with the ratio of the number of teeth of the gears 17 and 16. In terms of reduction ratio, it rotates at a lower speed than the grinder.

As shown in FIG. 1, when the grinder is new, the outer diameter of the grinder is large, so the tip 1a protrudes from the tip of the hammer tip 21, and the grinder 1 first bites into the root of the cast burr 25.
The grinder moves in the direction of arrow 26 while cutting off the root portion of the cast burr, and then an impact is applied by the hammer tip 21 to the cast burr 25 whose root portion has been cut off, thereby continuously removing the cast burr. It will be done.

Also, if the grinder wears out due to long-term use and its tip reaches inside the tip of the tip 21 of the rotary hammer as shown in Figure 2, the grinder will move away from the grinder as the tool advances. As shown in Fig. 2, the protruding hammer tip 21 first collides with the cast burr 25 and breaks its top part, and then the grinder 1 cuts off the remaining cast burr's root part and performs finishing processing. We move forward.

Therefore, when this tool is used, rough machining with a rotary hammer and finishing machining with a grinder are performed at the same time, and all the burr removal work can be completed by simply following the burr path once.

As described above, the present invention is a deburring tool used for robots, manipulators, and other work machines for cast deburring work, and includes a grinder drive shaft 2 connected to a drive source, and a grinder drive shaft 2 connected to a drive source. The grinder 1 attached to the tip, the gear 17 formed on the outer periphery of the axially intermediate portion of the grinder drive shaft 2, and the member that supports the grinder drive shaft 2 rotatably support the grinder 1, and the gear 17 and the inner The internal gear 1 is eccentric with respect to the grinder drive shaft 2 so as to contact the grinder drive shaft 2 and transmit the rotation of the gear 17 at a reduced speed.
6, and a rotary hammer 27 coaxially fixed to the internal gear 16 and equipped with a hammer tip 21 on the outer periphery. Rough machining and finishing machining can be performed at the same time in a single casting deburring operation, making it possible to significantly improve productivity by improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view of a deburring machine tool which is an embodiment of the present invention, and Fig. 2 is a rotary hammer and a deburring machine showing the state of deburring work when the grinder of the tool is worn out. FIG. 3 is a side sectional view showing only a portion of the grinder. 1... Grinder, 2... Grinder drive shaft,
3... Threaded portion, 9, 11... Bevel gear, 10... Drive shaft, 14... Hammer holder, 16... Internal gear, 17... Gear (reduction mechanism), 20... Rotating plate, 23... Workpiece, 24...Casting surface, 25...
Casting burr, 27...rotary hammer.

Claims (1)

[Scope of utility model registration request] Robots and manipulators for casting deburring work,
A deburring tool used for other working machines,
A grinder drive shaft 2 connected to a drive source, a grinder 1 attached to the tip of the grinder drive shaft 2, a gear 17 formed on the outer periphery of the axially intermediate portion of the grinder drive shaft 2, and the grinder drive an internal gear 16 that is rotatably supported by a member that supports the shaft 2 and is eccentric with respect to the grinder drive shaft 2 so as to be inscribed in the gear 17 and transmit the rotation of the gear 17 at a reduced speed; A rotary hammer 27 coaxially fixed to a rotary hammer 27 and having a hammer tip 21 on the outer periphery.