JPH0253509A - Steel rod end chamfering device - Google Patents

Abstract

PURPOSE:To save labor in a chamfering work of a steel rod by moving the steel rod two-dimensionally with horizontal and vertical movement servomotors after detecting the end surface position of the steel rod by bringing a material detecting rod in contact with the end surface by advancing a headstock and positioning a milling cutter. CONSTITUTION:After clamping a steel rod 40 with a clamp 41, a material detecting rod 31 is made to face the end surface and the detecting rod 31 is brought in a contact with the end surface of the steel rod 40 by advancing a headstock 22 by means of a motor 25. The detecting rod 31 causes an access sensor 38 to stop the motor 25, to stop the advancement of the headstock 22 and brings a milling cutter 29 in a position exactly overlapped with the outer circumferential edge of the end surface of the steel rod 40. Chamfering of the end surface of the steel rod 40 is automatically performed by moving the milling cutter 29 along the outer circumference of the end surface with numerical data commanded from a numerical control device with a horizontal movement servomotor via a screw shaft 4 and with a vertical movement servomotor 15 via a screw shaft 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for chamfering the cut end of a steel bar.

[Prior Art and its Problems] Generally, a hot saw is used to cut hot rolled steel materials (bars with cross-sections, square bars, and other cross-sectional shapes, hereinafter referred to as steel bars). In this case, burrs are generated on the outer periphery of the cut end surface, but these burrs impair the product value and tend to cause trouble in the next processing process.Therefore, conventionally, a rotating grindstone was used to remove the burrs by hand. However, it is very time-consuming and the process is very time consuming, and since the paris is extremely hard due to the cooling water and the effect of air cooling on the edges, it is very time consuming to remove it with a rotating grindstone. Rationalization has long been an issue.

[Object of the Invention] The present invention aims to achieve the above-mentioned problems and to save labor in chamfering the ends of a steel bar.

[Means for achieving the object] In order to achieve the object, the steel bar end face claw device of the present invention has the following features:
A column is provided so that it can move left and right along a horizontal rail by driving a servo motor for horizontal movement, and an elevating body is provided so that it can move up and down along a vertical rail provided on the column by driving a servo motor for vertical movement, A headstock is provided so that it can move back and forth along a horizontal guide provided on the elevating body by the drive of a motor for forward and backward movement, and the headstock has a main shaft having a milling cutter at its tip and a main shaft that rotates the main shaft. A motor is provided, a material detection rod is provided on the headstock so as to move back and forth parallel to the main shaft, and a clamp is provided to horizontally fix the bar so that the end face faces the material detection rod. After detecting the end face position of the steel bar with a material detection rod and positioning the headstock back and forth, the milling cutter is rotated along the outer periphery of the end face of the steel bar by the cooperation of the horizontal movement servo motor and the vertical movement servo motor. It is characterized by the following.

[Example] Next, one embodiment of the present invention will be described with reference to the drawings.

First, the main body of the chamfered Mffi will be explained. The base 1 has horizontal rails 2, 2 provided in parallel on its upper surface, a horizontal movement servo motor 3 provided at one end of the base 1, and a screw shaft 4 connected to the rotating shaft of the horizontal movement servo motor 3. are supported parallel to each other by bearings 9 between the horizontal rails 2, 2. A column 5 is placed on the horizontal rails 2, 2, and a ball screw 6 fixed to the bottom surface of the column 5 via a bracket 18 is screwed onto the screw shaft 4. Therefore, when the screw shaft 4 is rotated by driving the horizontal movement servo motor 3, the column 5 moves left and right along the horizontal rails 2, 2.

The column 5 has a hollow cylindrical shape and is provided with parallel vertical rails 7.7 on one side thereof. Also, a sprocket to the frame 8 formed at the upper end of the column 5, 10.
11.11 is coaxially supported, and one end 23 of the chino 12.12 wound around the sprocket is fixed to the balance weight 13 provided in the column 5, and the other end 24 is fixed to the elevating body 14. . The elevating body 14 is connected to the vertical rail 7.
7 so that it can move up and down. Reference numeral 15 denotes a vertical servo motor for vertically moving the elevating body 14, and a screw shaft 16 connected to the vertical servo motor 15 is rotatably supported by a bearing 17 between the vertical rails 7.7.

A ball screw 20 fixed to the back surface of the elevating body 14 via a bracket 19 is screwed onto the screw shaft 16.

A pair of horizontal guides 21.21 are provided at the upper and lower edges of the elevating body 14, and a headstock 22 is provided so as to be able to move back and forth along the horizontal guides 21.21. Reference numeral 25 denotes a motor for longitudinal movement of the headstock 22. A screw shaft 26 connected to the motor 25 for longitudinal movement is screwed into a ball screw 27 fixed to the back of the headstock 22 via a bracket 39. 26 causes the headstock 22 to move back and forth. A main shaft 28 is horizontally supported on the head stock 22, and a milling cutter 29 is detachably provided at the tip of the main shaft 28.

30 is a main motor that rotates the main shaft 28. Further, a material detection rod 31 is provided on the headstock 22 so as to move back and forth in parallel with the main shaft 28 . That is, a longitudinal guide 32 is fixed on the upper surface of the headstock 22.

A shoe 33 is arranged on the linear guide 32, and the shoe 3
A shaft bearing part 34.35 is formed at the front and rear of the cylinder 3, and the piston rod end of the cylinder 36 is connected to the rear shaft bearing part 35, and the material detection rod 31 is inserted into the shaft bearing part 34.35 so as to be freely retractable. A coil spring 51 is interposed between a flange 50 formed on the outer periphery of the material detection rod 31 and the shaft bearing 34 to urge the material detection rod 31 forward, and a coil spring 51 is inserted between the collar 50 formed on the outer periphery of the material detection rod 31 and the shaft bearing 34 to urge the material detection rod 31 forward. Proximity sensor 38 is attached to the formed mounting base 37.
is provided, so that when a magnetized piece fixed to a part of the outer periphery of the material detection rod 31 approaches this, the proximity sensor 38 is activated.

On the other hand, a clamp 41 is installed in front of the main body of the chamfering device to horizontally fix the support @40 with its end face facing the material detection rod 31. The clamp 41 has a material table 43 having a front V-shaped 'fjtW1 surface on a base 42.
A cylinder 45 and guide shafts 46 and 46 are provided on both sides of the cylinder 45 perpendicularly to the tip of the machine frame 44 extending from one side of the base 42 toward Leahy, and the piston rod of the cylinder 45 and the guide shaft 46. Surface plate 47 at the bottom end of 46
A support shaft 48 is provided on the surface plate 47, and a clamp member 49 is attached to the support shaft 48 so as to be tiltable about the support shaft 48. Therefore, the cylinder 45 is operated and the surface plate 4
7 is lowered, the clamp member 49 presses down the steel bar 40 placed on the material stage 43, and the steel bar 40 can be fixed immovably.

However, in this lever chamfering device, after fixing the steel bar 40 with the clamp 41 as described above, the material detection rod 31 is opposed to the end face of the @@40, and the back and forth movement motor 25 is operated to advance the headstock 22. The material detection rod 31 is brought into contact with the end surface of the steel bar 40. At that time, the material detection rod 31 is connected to the coil spring 3.
The magnetized piece of the material detection rod 31 contracts against the elasticity of the material detection rod 6 and activates the proximity sensor 38, thereby stopping the forward and backward movement motor 25 and stopping the advance of the headstock 22. The mounting position of the proximity sensor 38 is adjusted in advance so that the milling cutter overlaps the outer periphery of the end face of the top steel bar 40 at its stop position. Then horizontal movement servo motor 3
The end face of the steel bar 40 is chamfered by rotating the milling cutter 29 along the outer periphery of the end face of the steel bar 40 as shown in FIG. This is done automatically.

[Effects of the Invention] As described in the embodiments above, the steel bar end face claw device of the present invention advances the headstock and applies its material detection rod to the end face of the steel bar to detect the end face position and move the milling cutter to the desired position. The cutter is then stopped and then moved two-dimensionally by a servo motor for horizontal movement and a servo motor for vertical movement to perform chamfering, so it does not require much manual labor. This is advantageous in that it can process the end face of II without having to do so, resulting in significant labor savings.

[Brief explanation of the drawing]

The drawings show an embodiment of the bar steel end face pawl device of the present invention, in which FIG. 1 is a partially sectional side view, FIG. 2 is a front view of the main body of the chamfering device, FIG. 3 is a front view of the clamp, and FIG. FIG. 4 is a diagram showing the movement trajectory of the milling cutter during chamfering. 2...Horizontal rail, 3 river horizontal movement servo motor, 4...
...Screw shaft, 5...Column, 6...Ball screw, 7
゜7...Vertical rail, 14...Elevating body, 15...
・Vertical movement servo motor, 16... Screw shaft, 20...
・Ball screw, 21.21...Horizontal guide, 22・
... Headstock, 25... Back-and-forth motion motor, 26... Screw shaft, 27... Ball screw, 28... Main shaft, 30...
...Main motor, 31...Material detection rod, 38...Cylinder, 4G...Steel bar, 41...Clamp, 43...
・Material table.

Claims (1)

[Claims] A column is provided so that it can move left and right along a horizontal rail by the movement of a servo motor for horizontal movement, and an elevating body is provided so that it can move up and down along a vertical rail provided on the column by the drive of a servo motor for vertical movement, A headstock is provided so that it can move back and forth along a horizontal guide provided on the elevating body by the drive of a motor for forward and backward movement, and the headstock has a main shaft having a milling cutter at its tip and a main shaft that rotates the main shaft. A motor is provided, a material detection rod is provided on the headstock so as to move back and forth parallel to the main shaft, and a clamp is provided to horizontally fix the bar so that the end face faces the material detection rod. After detecting the end face position of the steel bar with a material detection rod and positioning the headstock back and forth, the milling cutter is rotated along the outer periphery of the end face of the steel bar by the cooperation of the horizontal movement servo motor and the vertical movement servo motor. A steel bar end chamfering device characterized by: