JPH0224607Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is mainly used for surface polishing, deburring, or rounding of the edges of cutting tools such as small-diameter micro drills with a diameter of about 0.3 mm to 3 mm. The present invention relates to a jig for use in various barrel polishing devices, and more specifically, to a cutting tool polishing jig that is inserted into a polishing cylinder of a barrel polishing device while holding a large number of the cutting tools.

Prior Art In cutting tools such as those mentioned above, grinding is used to improve cutting performance, cutting accuracy, and durability of the cutting tool, or to maintain the same cutting performance over a long period of time. Various treatments are then performed. In other words, when the surface of the cutting edge is polished, it is possible to improve machinability, cutting accuracy, and durability of the cutting tool, and when deburring, cutting accuracy can be particularly improved. In addition, when rounding the edge of the cutting edge, although it slightly impairs cutting performance, cutting resistance can be reduced and chipping (damage) and wear of the cutting edge can be suppressed, improving durability and improving the same cutting ability. This means that you will be able to maintain your sexuality for a long period of time.

Conventionally, this type of treatment has been carried out using a honing zone using an oil stone or a liquid honing process.

Problems that the invention aims to solve: However, because the cutting edge of a cutting tool has a complex shape, the conventional polishing process described above can only process one piece at a time, which significantly reduces work efficiency. There is a problem. Furthermore, since the polishing work requires skill, there is a problem in that quality varies due to individual differences among workers, making it impossible to achieve uniform quality.

Therefore, the inventors of the present application conducted various researches to solve the above problem, and found that, for example,
It has been found that the above problem can be solved by storing a large number of cutting tools in the polishing cylinder of a barrel polishing device as disclosed in Japanese Patent No. 97838.

The present invention was made based on this knowledge, and can hold a large number of cutting tools inserted into the polishing cylinder of a barrel polishing device, and as a result, it is possible to polish the surface of the cutting tool's cutting tool, remove burrs, or remove the edge of the cutting tool. It is an object of the present invention to provide a polishing jig for a cutting tool that can efficiently perform polishing and honing processes such as rounding and honing, and can achieve the same quality.

Means for Solving the Problems The polishing jig for cutting tools according to the present invention is a polishing jig for cutting tools that is stored in a barrel tank of a barrel polishing device and performs display polishing of the cutting edge of the cutting tool, etc. ,
a tool holding plate formed by overlapping two rectangular plates and holding a cutting tool under pressure between the overlapping surfaces along the longitudinal direction of the rectangular plates with the cutting edge side facing in the radial direction;
and a support plate attached to both ends of the support shaft, and a rubber-lined V-groove for holding the shank of the cutting tool is provided on the overlapping surface of the tool holding plate, and there are two support plates. The tool holding plate is formed by overlapping two discs and is attached to both ends of the support shaft, and a splitter supporting the end of the tool holding plate is attached to the circumferential end of one of the two discs. A groove is provided in the circumferential direction, and a square hole into which the end of the tool holding plate is fitted is provided at a position corresponding to the groove on the other disk, and passes through the two disks in the axial direction. In addition to forming escape holes for abrasive materials and chips at equal intervals in the circumferential direction, the depth of the grooves is set so that the cutting edge of the cutting tool is located inside the disc when the cutting tool is attached to the tool holding plate. It is characterized by the following.

Function In such a case, by inserting both ends of the tool holding plate into the grooves and square holes of the support plate, the tool holding plate will be reliably supported by the support plate. In other words, a large number of tools can be held securely.

Embodiment An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a longitudinal sectional view showing a state in which a large number of cutting tools are attached to a polishing jig for cutting tools according to the present invention;
Figure 2 is an exploded perspective view showing the main parts of the proposed jig, Figure 3
The figure is a sectional view taken along line A--A in FIG. 2.

At both ends of the support shaft 2 of the jig 1 of the present invention, support plates 3, 3 formed by overlapping two discs 31, 32 are attached. In this installation, the support plates 3, 3 are positioned with respect to the support shaft 2 using steps formed at both ends of the support shaft 2, and then the nuts 4 are fastened to the male screws 2a, 2a provided at both ends of the support shaft 2. will be carried out.
Therefore, in this attached state, the support plate 3 is fixed to the support shaft 2 without play. The support plate 3 is made of light metal such as aluminum or plastic.

Note that the discs 31 and 32 are not limited to one disc, but may be a stack of a plurality of discs as described above. Alternatively, a spacer may be fitted onto the intermediate portion of the support shaft 2, and the support plates 3, 3 may be positioned using this spacer.

Support plate 3, that is, inner disk 31, outer disk 32
Eight through holes are formed at equal intervals in the circumferential direction in the radially intermediate portion of the hole to serve as escape holes 33. This relief hole 33 is provided inside the polishing cylinder 27 when the proposed jig 1 is inserted into the polishing cylinder 27 of the barrel polishing device 20 to polish the cutting edge 7a of the cutting tool 7, which will be described next. It flows in a figure 8 shape and serves as a flow port for the abrasive material and chips that polish the cutting tool 7, and functions to improve polishing efficiency and suppress the adverse effects of heat generation without interfering with the flow of these materials. do.

Note that the formation position, number, and size of the escape holes 33 are not limited to those shown in the example shown, but may be appropriately set according to the size of the tool holding plate 6, the diameter dimension of the support plate 3, etc. described below. It is something that Also,
There are various types of barrel polishing devices, and for example, in a barrel polishing device in which the abrasive material flows in the radial direction of the support plate 3, it is not necessary to form the escape hole 33.

The support plate 3 has a total of 12 long rods in the axial direction of the support shaft 2 (two in Fig. 1 and only one in Fig. 2) extending between the support plates 3 and 3 on both sides. Tool holding plates 6 are attached at 12 equally spaced positions in the circumferential direction. The tool holding plate 6 is formed by overlapping two rectangular plates 61 and 62, as will be described later, and a large number of cutting tools 7 are mounted on the overlapping surface at equal intervals in the longitudinal direction.
... (for example, a small diameter micro drill with a diameter of about 0.3 mm to 3 mm) is held under pressure.

The tool holding plate 6 is attached to the support plate 3 in the following manner. That is, as shown in FIG. 2, the ends of 12 tool holding plates 6 are fitted externally at 12 equally spaced positions in the circumferential direction at the circumferential end of the inner disk 31 to support them. Square-shaped fixing holes 35 are formed in the book (only four holes are shown in the drawing), and the same number of fixing holes 35 are formed in the circumferential direction corresponding to the fixing holes 35 in the outer disk 32 (also shown in the drawing). In this figure, only four grooves 34 are formed. In this way, the fixing holes 35, 35 of the outer discs 32, 32 are fixed so that both ends of the tool holding plate 6 protrude.
The tool holding plate 6 is fixed to the support plates 3, 3 by inserting it into the grooves 34, 34 of the inner discs 31, 31 adjacent to the fixing holes 35, 35 from the outside. become. Here, the width dimension of the fixing hole 35 is set to be approximately the same as the width dimension of the tool holding plate 6, and the groove width dimension of the split groove 34 is set to a value slightly larger than the thickness of the tool holding plate 6. Therefore, the tool holding plate 6 is securely fixed to the support plate 3 in the attached state.

Next, details of the tool holding plate 6 will be explained based on FIG. 3. This tool holding plate 6 has a V groove 63 formed on the inner surface of a rectangular plate 61 located on the outside, into which the shank (shaft portion) of the cutting tool 7 is fitted.
The groove 63 overlaps the rectangular plate 62 from the inside with the shank fitted, and then both the rectangular plates 61 and 62
are fastened at both ends with bolts 66, 66 (see FIG. 1) and nuts (not shown) to form a basic structure in which the cutting tool 7 is held under pressure. The size and formation position of the V-groove 63 are selected based on the diameter dimension of the cutting tool 7 to be held. Rubber linings 65, 6 are provided on the groove surface of the V groove 63 and on the inner surface of the rectangular plate 62.
4 is provided to prevent accidental damage to the shank in the pinched state. In addition, the first
As shown in the figure, the cutting edge 7a of the cutting tool 7 is in a protruding state.

Next, the proposed jig 1 is stored in a polishing cylinder of a barrel polishing device, and the surface of the cutting edge 7a of the cutting tool 7 is polished.
A case of deburring or rounding the edge of the cutting edge 7a will be described. 4 and 5 show the barrel polishing apparatus disclosed in the above-mentioned Japanese Patent Laid-Open No. 59-97838 as an example of the barrel polishing apparatus to which the present jig 1 is applied.

This barrel polishing device 20 has a polishing cylinder 27
The purpose is to increase the polishing efficiency of the polishing body by making the abrasive stored in the polisher flow in a figure-eight shape. That is,
When the motor 22 attached to the bottom of the case body 21 is driven, the bobbin-shaped rotary drum 24 rotates at high speed (approximately 150 rpm) via the V-belt 23.
The discs 2 provided on the left and right sides of the rotary drum 24
Four cylinder receivers 26 are rotatably mounted between 5 and 25 with their axes tilted at a predetermined angle (5 degrees to 25 degrees) with respect to the rotation center axis of the rotary drum 24.
A polishing cylinder 27 rotatably supported inside the polishing cylinder 27 revolves together with the rotary drum 24,
It also rotates on its own axis. In this way, the abrasive material (not shown), which is made up of abrasive grains, ceramic balls, etc., and is housed in the abrasive cylinder 27 is agitated by the centrifugal force of the rotation of the rotary drum 24 in a figure-eight pattern along the inner wall of the cylinder. It will be in flux depending on the state.

Therefore, as described above, a large number of cutting tools 7
The proposed jig 1 holding the polishing cylinder 27
When the abrasive material is loaded into the cutting tool 7, the abrasive material flowing in a disturbed state slides under pressure on the surface of the cutting edge 7a having a complicated shape of each cutting tool 7.
The surface of the blade 7a is polished, deburred, or the edge of the cutting edge 7a is uniformly rounded.

At this time, the proposed jig 1 will also roll along the inner wall of the polishing cylinder 27, but the support plate 3 will also protect each cutting tool 7, so the cutting tool 7 will not be scratched. There is no risk of such occurrence.

Incidentally, the amount of polishing and the type of polishing, that is, the selection of surface polishing, deburring, or rounding of the edge of the cutting edge 7a, is performed by appropriately setting the rotation direction, rotation speed, polishing time, etc. of the polishing cylinder 27. .

The entire details of the illustrated embodiment are as described above,
The jig 1 of the present invention is not limited to the polishing process using the barrel polishing device shown in the above embodiment, but can be used with a barrel polishing device in which the abrasive material flows in the radial direction of the support plate 3 as described above, or other devices. The present invention can be similarly applied to the case where polishing is performed using a barrel polishing device having the form of the above, and it goes without saying that it can be applied regardless of whether it is a wet type or a dry type.

Effects of the invention In the case of the above-described jig, a large number of cutting tools to be polished can be stored in the polishing cylinder while being securely held. Polishing and honing processes such as cutting or rounding of the cutting edge can be performed. Therefore, the polishing efficiency can be significantly improved compared to the conventional technique described above, and the manufacturing cost of the cutting tool can be significantly reduced. Moreover, the performance of the cutting tool can be significantly improved. Moreover,
Another advantage is that uniform polishing accuracy can be achieved without causing any damage to the cutting tool.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view showing a state in which a large number of cutting tools are attached to a cutting tool polishing jig according to the present invention,
Figure 2 is an exploded perspective view showing the main parts of the proposed jig, Figure 3
The figure is a sectional view taken along the line A--A in FIG. 2, FIG. 4 is a schematic front view showing an example of a barrel polishing apparatus to which the proposed jig is applied, and FIG. 5 is a schematic side view thereof. 2...Support shaft, 3...Support plate, 31...Inner disk, 32...Outer disk, 33...Escape hole, 34
... split groove, 35 ... fixing hole, 6 ... tool holding plate,
63... V groove, 7... Cutting tool, 7a... Cutting edge.

Claims (1)

[Scope of utility model registration request] This is a polishing jig for cutting tools that is stored in the barrel tank of a barrel polishing device and performs surface polishing of the cutting edge of the cutting tool. The tool holding plate is provided with a tool holding plate that holds a cutting tool under pressure between the overlapping surfaces with the cutting edge facing in the radial direction, and a support plate that is attached to both ends of a support shaft, and the overlapping surface of the tool holding plate is provided. is provided with a rubber-lined V-groove for holding the shank of the cutting tool, and the support plate is formed by overlapping two discs and is attached to both ends of the support shaft, and the support plate A groove for supporting the end of the tool holding plate is provided in the circumferential direction at the circumferential end of one of the disks, and a tool holding plate is provided at a position corresponding to the groove on the other disk. A square hole is provided to fit the end of the disc, and holes for abrasive material, chips, etc. to escape through the two discs in the axial direction are formed at equal intervals in the circumferential direction, and the depth of the split groove is A cutting tool polishing jig characterized in that when the cutting tool is attached to a tool holding plate, the cutting edge of the cutting tool is located inside the disc.