JP3138320B2 - Countersunk drilling machine for plate-shaped members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching device for forming a countersunk hole in a plate-shaped member, and more particularly to a plate for mounting a plate-shaped member mounting member made of a glass plate as an outer wall of a building. The present invention relates to a hole punching device.

[0002]

2. Description of the Related Art In a process of making a countersink in a glass plate,
If the glass plate is pierced from one side of the glass plate by a perforating device such as a core drill at a stretch, so-called nicks or large notches or cracks are generated around the hole.

[0003] Therefore, a core drill is made from one side of the glass plate, a straight hole is provided halfway through the glass plate, and then the other surface of the glass plate is connected to the cored surface.
Is penetrated by puncturing by a core drill which is provided on the drill coaxially, methods such some misalignment of the front and back of the hole to fix the countersink processing by Cima have been taken. However, when attempting to drill countersink holes by the above-described method, the most widely used vertical single-axis type hole drilling machine has to change from a core drill to a seamer during the process, which is very troublesome. I a-consuming process
You. In addition, even if the holes on the front and back are slightly misaligned , even if the countersinking is performed by a seamer, a minute step is inevitably generated at the boundary.

[0004] Therefore, a method has been proposed in which a core drill and a seamer are integrated to perform countersinking at once without the need for drill replacement. In a series of steps, a straight hole is formed by a core drill, and a subsequent seamer is formed. A core drill is formed during the process of forming a thread surface by using a separate seamer that is independent of the core drill from the surface opposite to the straight hole provided with the thread surface on the surface of the plate-shaped member. Drilling the countersink has been done in a time-saving manner without the hassle of replacing the Cima with the Cima.

[0005] The above punching device will be described with reference to the drawings . Figure 3 is Ru fragmentary cross-sectional view showing an example of a punching device of a conventional dish hole. The seamer 33 is inserted and mounted from the blade portion 32 side of the core drill 31 so as to be integrated with the core drill 31 and to follow the blade portion of the core drill 31.
The drilling tool in which the core drill 31 and the seamer 33 are integrated is brought into contact with one surface of the glass plate, a straight hole is provided by the blade 32 of the core drill 31, and the drilling device is further advanced by the blade 34 of the seamer 33. The thread surface processing is performed, and then, the plate-like member is countersunk with another seamer from the opposite side of the drilling device in which the core drill 31 and the seamer 33 are integrated, thereby shortening the drilling time. I was able to.

[0006]

[SUMMARY OF THE INVENTION However, since the tip of the CIMA <br/> blade section are those would quickly cause deterioration of the blade spill even perforation of a few times, the blade portion side of the Cima is a core drill With conventional drills, the diameter of the tip of the seamer is larger than the outer diameter of the blade of the core drill, the spilling of the blade at the tip of the seamer directly affects the thread surface provided on the periphery of the straight hole. Had been affected. In other words, the periphery of the straight hole at the boundary with the yarn surface cannot be sufficiently cut due to the blade spilling, and there is uncut material at this boundary, and the yarn surface and the straight hole must be smoothly connected. Could not. In addition, the core drill is thicker by the diamond layer than the bladeless part where the seamer is mounted , so there is inevitably rattling between the seamer mounted from the blade side and the core drill. and will, stable instrumentation clothes was difficult.

Further, a plate provided with the straight holes
If the diameter of the tip of the seamer to be countersunk from the opposite side of the surface of the shaped member is not smaller than the inner diameter of the straight hole, the tip of the inclined blade part of the seamer that will be generated while using this seamer several times the blade spill, uncut portion in the portion of the boundary between the straight hole and the countersink processing unit will occur smoothly there is drawback can not be continuous and countersink and straight bore.

The presence of unevenness due to uncut portions formed at the boundary between the straight hole, the countersunk portion, and the yarn surface is particularly problematic when a plate-like member is used as an outer wall of a building. In the case of a supporting structure that supports the weight of the plate-shaped member by the countersink used , even if there is a slight unevenness formed at the boundary between these straight holes, the countersink processing part, and the yarn surface, The holding strength is remarkably reduced, and the plate member is damaged, and the plate member may be dropped.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to provide a device for punching a countersunk hole in a plate-like member, which has not been known before. is there.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a first seamer having a grinding blade portion in a portion having a substantially frustoconical cross-sectionally inclined shape. A drilling tool mounted on a cylindrical core drill having a blade portion at a tip end thereof, and a second seamer for forming a countersunk hole processing portion disposed coaxially with the core drill of the drilling tool. A plate-shaped hole drilling device for plate-like members, which is mounted on a drill rotating device provided above and below a plate-shaped member to be drilled with holes, wherein the first seamer has a tip on the side of the grinding blade. The diameter is set to be smaller than the outer diameter of the blade portion of the core drill, and the diameter of the first seamer is expanded toward the opposite side of the blade portion of the core drill. Between the grinding blade tip and the core drill blade Recess is formed at the boundary between the post,
The second seamer is provided with a countersunk hole drilling device for a plate-shaped member, wherein the diameter of the tip of the grinding blade portion is smaller than the outer diameter of the blade portion of the core drill.

[0011]

According to the drilling device of the present invention, the first seamer is mounted behind the blade of the core drill from the side opposite to the blade, the two are integrated, and the diameter of the tip of the grinding blade of the seamer at the joint is provided. However, it is smaller than the outer diameter of the blade part of the core drill,
The cross section of the boundary between the two is substantially triangular. As a result, there is no unevenness such as uncut shavings at the boundary between the straight hole provided by the core drill and the thread surface provided by the seamer, which is accompanied by the deterioration of the tip of the grinding blade of the seamer. , The yarn surface and the boundary between the two.

Further, since the diameter of the tip of the grinding blade portion of the second seamer is smaller than the inner diameter of the straight hole provided by the core drill, the tip of the grinding blade portion may be subjected to several grinding operations to prevent spills or the like. Even if the deterioration occurs, the boundary between the straight hole and the countersunk hole formed by the second seamer is extremely smooth without any unevenness due to uncut portions or the like.

Further, in the drilling device according to the present invention, the first seamer is mounted on the core drill and integrated with the core drill. After the straight hole is provided, the operation of providing the yarn surface is performed in a series of steps. Drilling can be performed by a two-step operation in which countersinking is performed on the opposite surface of the member by the second seamer, in which the exchange operation of the core drill and the seamer is omitted, and the time required for the drilling is greatly reduced. You.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an essential part showing an example of a countersunk hole punching device of the present invention. The piercing tool 10 is for forming a straight hole and a thread surface in the plate-like member 20. The cylindrical core drill 1 has a diamond layer (diamond grinding) at its tip.
Metal bond with metal matrix as bond matrix
Layer 2), and the first from behind the blade 2
Is attached to the core drill 1. The truncated cone-shaped seamer 3 has a grinding blade portion 4 in a portion having an inclined cross-sectional shape, and the diameter increases from the blade portion 2 side of the core drill 1 toward the opposite side.

The grinding blade 4 of the seamer 3 forms a thread surface on the periphery of a straight hole formed by the core drill 1. The diameter A of the tip of the grinding blade 4 is equal to the diameter A of the blade 2 of the core drill 1. It is set smaller than the outer diameter B, and has a recess having a substantially triangular cross section at the boundary between the tip of the grinding blade of the seamer 3 and the back of the blade 2 of the core drill 1.

The second seamer 5 is used for drilling a countersunk hole in a plate-like member. The frusto-conical seamer 5 has a grinding blade portion 6 at a portion having a cross-sectionally inclined shape. The diameter C of the tip of the grinding blade 6 is set smaller than the outer diameter B of the blade 2 of the core drill 1, and the countersink is mainly performed in a portion from the tip of the grinding blade 6 to the middle. . In particular, it is preferable that the diameter of the tip of the grinding blade 6 be smaller than the outer diameter of the blade 2 of the core drill 1 and larger than the inner diameter, since a smoother countersunk hole can be obtained.

The piercing tool 10 and the second seamer 5
Are arranged coaxially so as to face each other with a plate-shaped member 20 on which each blade portion side is bored, and mounted on a drill rotating device (not shown) capable of moving up and down, With this drill rotating device, the piercing tool 10 and the second
Is moved up and down while rotating.

[0018] Similarly to the grinding blade portions 4,6 blade unit 2 main
Talbond diamond layer, strength point,
It is preferable that the grinding blades 4 and 6 or the blade 2 be made of a cemented carbide member, although it is preferable that the grinding blades 4 and 6 or the blade 2 be made of a metal bond diamond layer from the viewpoint of drilling accuracy. The recess provided in the boundary portion between the first rear blade portion 2 of the grinding blades tip and core drill 1 Cima 3, there is no particular restricted to a triangular cross-section, if it even provided recesses The shape is not limited.

Next, the use of the countersink piercing device of the present invention will be described. FIG. 2 is a conceptual cross-sectional view showing a countersunk hole punching process using the countersink hole punching device of the present invention. The piercing tool 10 and the second seamer 5 are vertically mounted independently of each other on a vertical single-axis type drill rotating device (not shown). As shown in FIG. 2A, the core drill 1 of the piercing tool 10 is brought into contact with the plate surface of a plate-shaped member 20 made of, for example, a glass plate or the like from above, and the drill is gradually lowered. Drill holes. Further, by lowering the apparatus, the inclined grinding blade portion 4 of the seamer 3 grinds the periphery of the straight hole to form an inclined yarn surface, and the apparatus is lowered slightly before penetrating the plate member 20. Stop.

Thereafter, as shown in FIG. 2 (b), a seamer 5 independent of the core drill is brought into contact with the surface on the opposite side of the hole, that is, the lower surface of the plate-like member, so that the countersunk hole is ground and chamfered. I do. During the drilling process, the cooling liquid is kept flowing around the hole processing of the plate-shaped member, so that the metal bobbin is formed.
It is possible to prevent abnormal overheating of the command diamond layer.

In performing the countersunk hole drilling, the length of the core drill and the range of vertical movement of the drill rotating device are adjusted in advance according to the thickness of the plate member so that the plate member is not penetrated by the straight hole. Similarly, by changing the range of the vertical movement of the drill rotating device on which the second seamer 5 is mounted, a countersunk hole having a desired size and depth can be obtained. The positional relationship between the piercing tool 10 and the second seamer 5 is not particularly limited up and down, and may be appropriately changed depending on the thickness and type of the plate-like member 20. The second seamer 5 is attached to the lower portion in that the coolant is applied to the countersink processing portion without flowing down by applying the seamer 5 from the lower side of the plate-shaped member 20. It is desirable to be done.

Further, the plate-shaped member provided with the countersink by the countersink piercing device of the present invention is not limited to a glass plate, but a synthetic resin made of an organic material such as polycarbonates, polystyrenes and polymethyl methacrylates. Board etc.
Alternatively, two or more of them including a glass plate may be laminated.

[0023]

According to the present invention, the piercing tool is obtained by mounting the first seamer from the opposite side of the blade portion of the core drill and integrating them together. Is smaller than the outer diameter of the blade portion of the core drill, and the cross section of the boundary between the two is substantially triangular. For this reason, along with the deterioration of the tip of the grinding blade portion of the seamer, such as spilling, there is no occurrence of unevenness due to uncut portions or the like at the boundary between the straight hole provided by the core drill and the thread surface provided by the seamer. The boundary between the two, the straight hole and the yarn surface can be made extremely smooth. Further, according to the above-mentioned mounting, the first seamer can be brought into close contact with the core drill, and a boring device without rattling can be obtained.

Since the diameter of the tip of the grinding blade of the second seamer is smaller than the outer diameter of the blade of the core drill, it is smaller than the inner diameter of the straight hole formed by the core drill. Even if several grindings cause deterioration such as blade spillage, the boundary between the straight hole and the countersunk hole formed by the second seamer must be extremely smooth without unevenness due to uncut parts. can do.

As described above, the straight hole and the countersunk hole processing portion,
No irregularities at the boundary between the yarn surface, by obtaining a smooth countersink, when for supporting the plate-like member by mounting the fixture to the dish hole buildings precursor of a building, the plate-like member that It can withstand its own weight and can eliminate the risk of breakage and dropping of the plate member.

Further, in the drilling device according to the present invention, the operation of providing the thread surface after forming the straight hole is performed in a series of steps by the integrated drill having the first seamer mounted on the core drill. Drilling can be performed by a two-step operation in which countersinking is performed by the second seamer, in which the exchange operation of the core drill and the seamer is omitted.
The time required for drilling is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an essential part showing an example of a countersunk hole punching device of the present invention.

FIG. 2 is a conceptual cross-sectional view showing a countersunk hole drilling process using the countersink hole punching device of the present invention.

FIG. 3 is a sectional view of a main part showing a conventional countersunk hole punching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core drill 2 Blade part 3 1st seamer 4 Grinding blade part 5 2nd seamer 6 Grinding blade part 10 Drilling tool 20 Plate member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B28D 1/14 B23B 51/08 C03B 33/00

Claims (1)

(57) [Claims] 1. A piercing tool in which a first seamer having a grinding blade portion at a portion having a substantially frustoconical cross-sectionally inclined shape is mounted on a cylindrical core drill having a blade portion at a tip portion, and the piercing device. A second seamer for forming a countersunk hole portion disposed coaxially opposite the core drill of the tool is mounted on a drill rotating device provided above and below the plate-shaped member to be countersunk. A countersunk hole drilling device for a plate-shaped member, wherein a diameter of a tip of the first seamer on the side of the grinding blade portion is set smaller than an outer diameter of a blade portion of the core drill; The diameter of the core drill is expanded toward the opposite side of the blade portion of the core drill, thereby forming a recess at the boundary between the tip of the grinding blade portion of the first seamer and behind the blade portion of the core drill, The second seamer is the diameter of the tip of the grinding blade. Is smaller than the outer diameter of the blade of the core drill.