KR20040030012A - Thread cutting machine for reinforcing bar - Google Patents

Abstract

PURPOSE: A device for processing a thread of an end of a steel bar is provided to secure the movability, on-the-spot application, high processing speed and accuracy of the device, to shorten the term of works and reduce construction cost by increasing the efficiency and accuracy of bar arrangement works, and to obtain the capacity of structures by enhancing the combining strength of the steel bar. CONSTITUTION: A device for processing a thread to an end of a steel bar and including a vice(70) and a cutting head(50) driven by a motor(30) and a frame(20) on which the vice, the cutting head, and the motor are mounted is composed of a cutting head carriage and a motor carriage(31) reciprocating along a guide rod(22) fixed to the frame; the motor and the cutting head installed to motor and cutting head carriages, respectively, wherein the cutting head is connected with the motor through a gear assembly(40) including a transfer gear(44); and a transfer screw(10) of which a front end is combined to a transfer nut(21) fixed to the front of the frame, installed with a screw gear(11) at the inside and combined with the cutting head and motor carriages through a thrust bearing with connecting the transfer gear and the screw gear. The cutting head carriage reciprocates to the rotations of the motor.

Description

Rebar end thread processing equipment {THREAD CUTTING MACHINE FOR REINFORCING BAR}

The present invention relates to a screw processing apparatus for processing a male thread on the end of the rebar, and to allow the reciprocating movement as well as the rotational movement of the cutting tool through a single motor, thereby allowing convenient and rapid processing as well as miniaturization of the processing apparatus In addition, the mobility and field applicability of the rebar thread processing equipment are remarkably improved.

In the case of reinforcing reinforcement for reinforcement of reinforced concrete structures, the general reinforcing method of reinforcing bar is to overlap the both ends of the reinforcing bar to a certain length and then tie it with a wire, etc., and use a joint or welding device to weld the connecting part. There are mechanical joints to connect. In general, mechanical joints are used for joints of large diameter reinforcing bars, and the typical mechanical joints are male threads formed at both ends of the reinforcing bars and matched with female threads. A method of coupling a coupler may be mentioned.

In the reinforcement through threaded reinforcing bars, couplers can be mass-produced as ready-made products, but since the rebars are changed in shape and dimension every time according to the size or shape of the structure, they are generally threaded to the end of the rebar through custom-made or field machining. Will form.

The apparatus for male threading of reinforcing bar ends includes US Patent 4,213,722 (TRANSPORTABLE EXTERNAL THREAD CUTTING MACHINE, 1980) and US Patent 4,526,496 (TAPERED THREAD CUTTING MACHINE, 1985). Of course, many improvements have been made compared to manual work, such as taper screw processing.

However, in the conventional rebar thread processing apparatus, the rotational movement of the cutting tool for forming the thread is made by a motor, but the axial reciprocation of the rebar to be processed is performed through pinions and racks connected to the handles. It was configured to be done manually, so each handle had to be handled manually, and therefore, the speed and precision of the work had to be limited.

In particular, when reciprocating a cutting tool manually, it is almost impossible to operate with a constant force and speed, so that the tip of the machined screw is frequently recessed, and there is a problem that a high degree of skill is required in the operation of the processing device. .

In order to solve this problem, a method of mounting a separate motor for the reciprocating motion of the cutting tool may be considered, but in this case, the reciprocating motor and its accessories will inevitably increase the size of the screw processing device and the motor for the rotational motion. In addition to the need for a high-level control device for the interlock and the reciprocating motor, there is a serious problem that is difficult to secure field applicability due to mobility.

The present invention has been made in view of the above-mentioned problems, and constitutes a motor reciprocating band and a cutting head reciprocating band reciprocating along a guide rod fixed to a frame, and the motor reciprocating band and the cutting head reciprocating band are respectively a motor and a cutting head. The cutting head is connected to the motor through a gear assembly including a transfer gear to be driven. The tip is coupled to a transfer nut fixed to the front of the frame and a screw is installed therein through a thrust bearing. It is coupled to the motor reciprocating and cutting head reciprocating band, by connecting the transfer gear and the screw gear, so that the cutting head reciprocating reciprocating as the motor is rotated, the reciprocating motion as well as the rotational movement of the cutting tool through a single motor It is possible.

1 is a perspective view of the present invention.

Figure 2 is a perspective view of the operating state of the present invention.

3 is a representative cross-sectional view of the present invention.

4 is a partially cutaway perspective view of the present invention.

5 is an exploded perspective view of main parts of the present invention.

Figure 6 is an illustration of the steel bars processed through the present invention.

Figure 7 is a perspective view of one embodiment of the present invention the handle is installed.

<Code Description of Main Parts of Drawing>

10: transfer screw

11: screw gear

20: frame

21: Nut

22: guide rod

23: handle

30: motor

31: Motor Round Trip (Carriage)

40 Gear-assembly

41: main gear

42: driven gear

43: internal gear

44: feed gear

50: Cutting Head

51: cutting head reciprocating band

52: Bite

61: thrust bearing

62: guide bearing

70 Vice

71: Jaw

72: vise handle

80: rebar

81: Coupler

The detailed structure and operation principle of the present invention will be described with reference to the accompanying drawings.

First, as shown in FIG. 1, the present invention includes a cutting head 50 that is rotated by a motor 30 and a vise 70 on which a processing target reinforcement 80 is fixed, and a frame 20 on which they are installed.

Cutting head 50 has a bite 52 built therein, and the cutting head 50 and the motor 30 are framed by the cutting head reciprocating band 51 and the motor reciprocating band 31, respectively. It is coupled to a pair of parallel guide rods 22 fixed to (20), the guide rod 22 and the cutting head reciprocating band 51 and the motor reciprocating band 31 is connected through the guide bearing 62 These cutting head reciprocating band 51 and the motor reciprocating band 31 is configured to freely reciprocate along the guide rod 22, as shown in FIG.

In addition, a vise 70 having a jaw 71 is installed at the front upper end of the frame 20 to be manipulated by the vise handle 72 to fix the rebar 80 to be processed. The configuration of the vise 70 is a general workpiece fixing means of the machine tool, which can be applied by a person of ordinary skill in the art to which the present invention belongs, and thus the detailed description and the claims are not limited thereto.

The cutting head 50 and the motor 30 are connected through the gear assembly 40 such that the rotational force of the motor 30 is transmitted to the cutting head 50. As an embodiment of the gear assembly 40, FIG. And a set of reduction gear groups composed of a main gear 41, a driven gear 42, an internal gear 43, and the like as shown in FIG. 5.

In addition, the gear assembly 40 has a feed gear 44, connected to the screw gear 11 installed on the feed screw 10, the feed screw 10 is formed with a male screw on the outer peripheral surface thereof as shown in FIG. Is coupled to the transfer nut 21 fixed to the front of the frame 20, and as the motor 30 rotates, the transfer screw 10 also rotates and reciprocates along its axis.

As such, the transfer screw 10 rotated and reciprocated by the motor 30 has a motor reciprocating band 31 and a cutting head reciprocating band by a thrust bearing 61 as shown in FIGS. 4 and 5. 51, the transfer screw 10 is rotated and reciprocated, so that the motor reciprocating band 31 and the cutting head reciprocating band 51 also reciprocate.

Therefore, as the motor 30 rotates, the cutting head 50 is rotated and, of course, reciprocated, so that a screw is formed in the rebar 80 without a separate operation, and such a threaded rebar 80 is illustrated in FIG. 6. As such, the coupling between the reinforcing bar 80 through the coupler 81 is made.

In forming the screw on the rebar 80, the cutting tool such as the bite 52 should be replaced according to the specification of the screw such as the pitch and the rotational speed and the reciprocating speed of the cutting tool should be adjusted. The adjustment of is possible by mounting the transmission through a gear combination, etc. This is a matter that can be applied to those of ordinary skill in the art that the present invention belongs to the specific description or claims are not limited thereto.

7 is a modified embodiment of the present invention, the handle 20 is installed on the frame 20 to make the movement more convenient.

After all, the technical gist of the present invention consists of a cutting head 50 and a vise 70 driven by a motor 30 and a frame 20 in which they are installed. In the apparatus, a motor reciprocating band 31 and a cutting head reciprocating band 51 reciprocating along a guide rod 22 fixed to a frame 20 are provided, and these motor reciprocating bands 31 and a cutting head reciprocating band are provided. The motor 30 and the cutting head 50 are respectively installed in the 51, and the cutting head 50 is connected to and driven with the motor 30 through the gear assembly 40 including the transfer gear 44. The transfer screw 10 having the front end coupled to the transfer nut 21 fixed to the front of the frame 20 and the screw gear 11 installed therein is connected to the motor reciprocating band 31 and the cutting head through the thrust bearing 61. Is coupled to the carriage 51, the transfer gear 44 and the screw gear 11 is connected, as the motor 30 is rotated A reinforced end threading device, characterized in that the cutting head carriage 51 is reciprocating.

Through the present invention, it is possible to secure the high processing speed and processing precision, as well as the mobility and field application of the rebar end screw processing apparatus, thereby increasing the efficiency and precision of the reinforcement work can obtain the effect of reducing the air and construction costs In addition, the fastening strength of the reinforcing bar can also be increased, thereby securing the performance of the structure.

Claims (1)

In the rebar end screw processing apparatus consisting of a cutting head 50 and a vise 70 and a frame 20 installed by the motor 30 to process the male screw at the end of the reinforcing bar 80, A motor reciprocating band 31 and a cutting head reciprocating band 51 reciprocating along the guide rod 22 fixed to the frame 20 are installed; The motor reciprocating band 31 and the cutting head reciprocating band 51 are provided with a motor 30 and a cutting head 50, respectively, and the cutting head 50 includes a gear assembly 40 including a transfer gear 44. It is connected to the motor 30 through the drive; The transfer screw 10 having the front end coupled to the transfer nut 21 fixed to the front of the frame 20 and the screw gear 11 installed therein is connected to the motor reciprocating band 31 and the cutting head through the thrust bearing 61. Is coupled to the carriage 51, the transfer gear 44 and the screw gear 11 is connected; Rebar end thread processing apparatus, characterized in that the cutting head reciprocating 51 is reciprocated as the motor 30 is rotated.