JPS6316909A - Multi-spindle boring device for web of h-section steel - Google Patents

Abstract

PURPOSE:To enable machining highly efficiently with simple construction by expanding a widthwise shift range via the arrangement of drills in a widthwise direction, increasing the vertical stroke thereof with a standby position kept higher and controlling a program for the variation of revolutions through mounting a pluraliity of drill types. CONSTITUTION:A drill travel range is expanded to 'L' and a drill standby position is made higher than a flange, thereby giving a stroke (l) for enabling boring from a position above the flange. And when a head 3 has shifted to a predetermined position via control by a control device 5, drills 2A, 2B and 2C are selected and actuated for feed, the number of revolutions correspond to a gear 4 makes open a joint hole and further the head 3 or an H-section steel is moved, thereby opening two rows of joint holes. Then, when the H- section steel and the head 3 have been moved and a drill 2D has come to a predetermined position, said drill 2D is automatically selected and actuated for feed, thereby opening a hole for a reinforcement with the corresponding number of revolutions.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for drilling multiaxial holes in an H-shaped steel web.

(Prior art and its problems) Holes are automatically drilled in the flanges and webs at the joints of H-beams used in construction steel beams by NC control using a multi-Hi1+1 H-beam processing machine. Ru.

In such a dedicated processing machine, a multi-axis (4-axis) drill unit 5 is used to drill holes on the web surface, as shown in Fig. 2.
0 was used to drill four holes at the same time.

However, in the case of an SRC structure for construction, the web of an H-shaped steel beam has several types of holes drilled with different diameters, such as holes for reinforcing bars in addition to holes for joints6, and in the aforementioned drill unit, the drill diameter is 1. Since only gods are installed, only marking 51 is done for holes with different diameters from the installed drill.
Separate]: Holes were being machined in the middle of the process, and efficiency was poor.

To solve this problem, there is a method shown in FIG. This is because the drill of the multi-axis drill unit 52 is arranged in the longitudinal direction of the H-shaped steel.1 Furthermore, the transmission 53
is provided so that the rotation speed can be selected according to the drill diameter.

In such a configuration, one drill is used for drilling holes for reinforcing bars, first, two joint Okawa drills are selected,
The drill unit 52 is moved in the width direction of the H-shaped steel to drill a joint hole, and then the H-shaped steel is moved, and a drill for reinforcing bars is selected to drill holes for reinforcing bars.

However, with this method, although the joint hole and reinforcing bar hole can be drilled in one process, two joint holes must be machined at a time, resulting in lower machining efficiency than in Fig. 2, and there are no holes of different diameters. This becomes noticeable in some cases.

Therefore, it has been desired to make joint holes and reinforcing bar holes in one step using a general drill arrangement as shown in FIG.

This invention was proposed in view of the above circumstances, and its purpose is to make joint holes and reinforcing bar holes at the same time by simply improving the device using the general drill arrangement described above. The object of the present invention is to provide an apparatus for multi-axis drilling of H-shaped steel webs that can efficiently drill holes in a process.

(Means for Solving the Problems) The apparatus for multi-axis drilling of 14-section steel web according to the present invention has a head in which a large number of drills are neatly arranged in the width direction of the H-section steel, The range of movement is expanded so that the tips of the multiple drills in the standby position are located above the upper end of the H-beam flange, and the feed stroke is adjusted so that the tips of the multiple drills in the standby position are located above the upper end of the H-shaped steel flange and can drill holes on the web surface from the position of the bracket. In this system, drills of different diameters or the same diameter are attached to each shaft, and the controller selects the desired drill and automatically drills holes at the drill rotation speed corresponding to the drill diameter.

(:3) (Function) For example, one of the four drills is used as a drill for drilling holes for reinforcing bars, and the other three are used as joint Okawa drills. First, the three joint Okawa drills are selected by the controller. The joint hole is drilled at a drill rotation speed corresponding to this diameter. At this time, the drill for drilling the reinforcing bars is in the standby position and does not hit the H-shaped steel flange.

Next, when the fitting hole is completed, the next hole is drilled until the position is H.
The shape steel or the head is moved, and the controller selects a drill for drilling holes for reinforcing bars, and the holes for reinforcing bars are drilled at a drill rotation speed corresponding to this diameter.

At this time, even if this hole is located near the flange, the other three joint Okawa drills will not hit the flange.

When there are no holes of different diameters, you can efficiently drill joint holes by attaching a four-piece drill of the same diameter.

(Embodiment) The present invention will be described below based on an illustrative embodiment.

As shown in Fig. 1, the drill unit 1 has a head 3 in which four drills 2 are neatly arranged in the width direction of the H-shaped steel, and the main shaft on which the drills are mounted is operated by a feeding mechanism that feeds the main shaft sleeve. It has a tile format and is configured so that each axis can feed independently.

Furthermore, a four-speed transmission 4, for example, is connected to the motor M, so that a drill rotation speed corresponding to the drill diameter can be obtained.

In such a configuration, the drill movement range is expanded so that the drill 2 can be positioned outside the H-shaped steel flange, and the tip of the drill 2 at the standby position is further expanded so that the drill 2 does not hit the flange. be located above the upper end of the H-shaped steel flange.

In addition, it is possible to drill holes on the web surface from the standby position.
Increase the tile amount (feed stroke) l.

These L and l are determined from the maximum dimensions of the H-section steel to be handled.

Furthermore, the drill unit is connected, the programmer selects any drill 2 according to the instruction, and the drill rotation speed corresponding to the drill diameter is set to the drill 2.
can be given to

In the above configuration, for example, drill 2A2B,
2C is used as a joint Okawa, and the other drill 2D is used as a reinforcing bar Okawa.

When the head 3 is moved to a predetermined position by NC control, the drills 2A, 2B, and 2C are automatically selected and given cutting feed, and a joint hole is drilled at a drill rotation speed corresponding to the drill diameter. Two rows of joint holes are made by moving the head 3 or the H-beam. Even when drilling the joint hole near the right flange in Fig. 1, the drill 2D
does not hit the flange.

Next, when the drilling of the joint hole is completed, the H-shaped steel and the head 3 are moved and the drill 2D is in the specified position.The drill 2D is automatically selected and cutting feed is applied to this drill diameter. Holes for reinforcing bars can be drilled at the corresponding drill rotation speed. Even if this reinforcing bar hole is located near the left flange in FIG. 1, the drills 2A to 2C rarely hit the flange.

Next, if there are no holes of different diameters, if the drills 2A to 2D are drills of the same diameter, it is possible to perform hole drilling with high efficiency compared to a general multi-axis unit.

Note that the number of drills is not limited to four, and it goes without saying that two or more types of drills of different diameters can be installed.

(Effect of the invention) As described above, according to this invention, the moving range of the drill is
The drill is expanded to the outside of the shaped steel flange, the drill standby position is raised, and the feed stroker is increased.Furthermore, an arbitrary drill can be selected by program commands and the drill rotation speed is given in accordance with the drill diameter. Therefore, the following effects are produced.

(i) Even with holes of various diameters, fully automatic hole drilling can be performed efficiently using a common drill arrangement.

(ii) It is relatively easy to improve, is inexpensive, and can be expected to have the same effect as an automatic tool change function.

(liil) When there are no holes of different diameters, efficient multi-axis drilling can be performed by attaching drills of the same diameter to all axes.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a multi-axis drilling device according to the present invention;
Figure 2 (5), @) is a front plan view showing a conventional device;
FIGS. 3(5) and 3(B) are a side view and a plan view showing another conventional device. 1...Drill unit 2...Drill 3...Head 4...Transmission 5...Control 8:; Procedural amendment 2. Name of the invention: Multi-axis hole drilling on the web surface of H-beam steel is device 3. Relationship with the person making the amendment Patent applicant 4, agent address ■107 Shadow Akasaka drawings, 6-5-21 Akasaka, Minato-ku, Tokyo Figure 1 has been corrected as per the supplement. No. H

Claims (1)

[Claims] (1) A large number of drills are attached to a head so that they can operate independently, and a transmission is configured to obtain a drill rotation speed corresponding to the drill diameter, and the head is moved to In a multi-axis drilling device that drills many holes in a surface, the head, which has a large number of drills arranged along the width direction of the H-beam steel, expands its range of movement so that it can be positioned outside the H-beam flange. The tips of the multiple drills in the standby position are located above the upper end of the H-shaped steel flange, and the feed stroke is increased so that holes can be drilled into the web surface from this position, and drills of different diameters or the same diameter are attached to each shaft. 1. A multi-axis drilling device for a web surface of an H-beam steel, characterized in that it is configured so that an arbitrary drill can be selected by a controller and the holes can be drilled automatically at a drill rotation speed corresponding to the diameter of the drill.