JPS63232902A - Full/automatic double end chamfering machine - Google Patents

Abstract

PURPOSE:To obtain a constant chamfered volume at both ends of a material being cut by allowing chamfering cutters provided at both ends of the material to slide in the axial direction of the material and performing chamfering operation after ensuring that both the chamfering cutters are in contact with the material. CONSTITUTION:When a material being cut 3 is fed from a constant-volume - feed mechanism and detected by an adjacent switch 45, a vise is operated by a control device 110 to clamp the material 3 being cut. Then, the quick-feed distance and cut-feed distance of slide motors 47, 48 are calculated based on the diameter, length, and chamfering conditions of the material, and drill units 40, 41 are quick-fed and out-fed by the slide motors 47, 48. After both chamfering cutters 49, 50 of both the drill units 40, 41 are brought into contact with both the ends of the material and a contact signal is given, the chamfering cutters 49, 50 are driven to cut both ends of the material being cut. Consequently, there is no variation in chamfered volume of both ends and the chamfered volume is constant.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fully automatic double-end chamfering method for automatically chamfering both ends of a bar-shaped steel material.

(Conventional Technique YF1) The automatic chamfering machine commonly used in the past includes a material supply cradle into which a rod-shaped metal work material is supplied to the chamfering part body;
The present invention includes a chamfered portion for cutting both edges of the metal workpiece, and a quantitative supply structure for supplying a fixed amount of the metal workpiece from the material supply cradle to the chamfered portion. In such a conventional automatic double-end chamfering machine, the workpiece is sent from the material supply cradle to the chamfering section by the constant supply mechanism, is chamfered, and is conveyed to the product cradle.

However, since the work material is cut using a band saw or a shearing press, the overall length is not necessarily constant. If such workpieces with different overall lengths are subjected to automatic double-end chamfering as they are, the amount of chamfering between one end face and the end face being used will vary, making it impossible to obtain a constant chamfering amount. . To prevent such variations in the amount of chamfering, when the workpiece is fed to the chamfering part, the operator manually adjusts the drill bit of the chamfering part, or by chamfering one side at a time. The method of doing this is being taken. Adjusting the drill bit on the chamfered part requires skill.
Also, the method of chamfering one side at a time takes time. As a result, manufacturing costs go up.

(Object of the invention) The present invention is a fully automatic double-end chamfering machine that fully automatically chamfers both end faces of a workpiece, even if the total length of the workpieces in 10 pieces is different, the amount of chamfering is uniform. It is an object of the present invention to provide a fully automatic double-end chamfering machine that can finish the chamfering process and obtain a desired chamfering amount even when the chamfering amount and shape of both end faces are different.

(Structure of the Invention) The present invention includes a material feeding cradle in which a bar-shaped metal workpiece is placed in a chamfered part main body, a chamfered part that cuts both ends of the metal workpiece, and a chamfered part that cuts both ends of the metal workpiece. In a fully automatic double-end chamfering machine equipped with a constant h1 supply 1a 11 for supplying a fixed amount of metal work material from a material cradle to the chamfered portion, the chamfered portion is slidable in the longitudinal direction of the work material. a pair of first and second drill units driven by the first and second drill units, both drill units are provided with first and second chamfer cutters facing each other concentrically on the center line of the workpiece; A circuit is installed that can detect the contact/non-contact state between the second chamfering cutter and the workpiece, and the chamfering operation is performed only when both the double-sided chamfering cutters are in contact with the metal workpiece, and the same or First, different chamfering conditions.
This is a fully automatic double-end chamfering machine characterized by being equipped with a control device that instructs the second drill unit.

(Function) The workpiece material supplied to the material supply cradle is caught in the quantitative supply mechanism and is quantitatively supplied to the chamfered portion. In the chamfering section, the chamfering operation is performed only when both the first and second chamfering cutters are in contact with the workpiece. Therefore, even if there are variations in the total length of the workpiece, both end faces can be chamfered to a predetermined amount. Further, the amount of chamfering and the shape of the chamfer at both ends can be set to different values or shapes by the control device.

(Example) In FIG. 1, which is a right side view of a fully automatic chamfering machine employing the present invention, 1 is a chamfer main body. A material feeding cradle 2 is provided at the rear end of the main body 1 (on the right side in FIG. 1). The material feeding cradle 2 is formed by arranging a plurality of L-shaped angles 4 in parallel, and is for arranging the work material 3 in a predetermined direction. The longitudinal end portion 5 of each L-shaped angle 4 is rotatably supported by the frame 6 of the main body 1 via a support shaft 7. A power cylinder 9 is arranged directly below the material supply cradle 2. Power cylinder 〇 is equipped with bush rod 10. A tip end 11 of the bushing rod 10 is rotatably supported by a lower end 12 of the material supply cradle 2 via a support shaft 13.

The lower end 12 is spaced rearwardly from the position where the L-shaped angle 4 is fixed. Therefore, when the power cylinder 9 causes the bushing rod 10 to protrude in the direction of the arrow α, the material supply cradle 2 rotates in the direction of the arrow β around the support shaft 7, and supplies the workpiece 3 to the cam roller 20 (planting supply mechanism). . 14
is a guide member fixed above the longitudinal end 5 of the L-shaped angle 4 to prevent the workpiece 3 from becoming entangled.

FIG. 2 is a front view and a right side view of the cam []-ra 20;
As shown in FIG. 3, the cam roller 20 is an annular member made of resin or metal, and has recesses 21 formed by cutting out a plurality of places (for example, three places) on the outer periphery at intervals of -.

In addition, the structure of the cam roller 2o is as shown in FIG.
A structure in which 2 is formed only at -. points may also be used. 20a
is a boss for fixing the cam roller 2o to a rotating shaft (only the center is shown) 23 by screwing a bolt 20c (only the center line is shown) into a bolt hole 20b drilled in the boss 20a.

As shown in FIG. 5, which is a plan view of the present invention, a plurality of cam rollers 20 are fixed on a rotating shaft 23 at regular intervals. At this time, the recess 21 (22) formed in one cam roller 20 must be fixed at a position facing the recess 21 (22) formed in the other cam roller 20 on the rotating shaft 23.

The rotation @23 is arranged on the main body 1 via a bearing 24.

Its positional relationship is generally parallel to the work material 3 supplied from the material supply cradle 2. The rotating shaft 23 rotates the workpiece 3 supplied from the longitudinal end 5 of the L-shaped angle 4.
The height is set so that it can be scooped up by the recess 21 of the cam roller 20. A pulley 25 is fitted and fixed concentrically to one end of the rotating shaft 23 (the right end in FIG. 5 in this embodiment).

As shown in FIG. 1, the pulley 25 is driven by a geared motor 27 via a belt 26. When the geared motor 27 drives the pulley 25 via the belt 26, the rotating shaft 23 rotates by J:, and therefore the cam roller 20
It also rotates. As shown in FIG. 6, which is an enlarged cross-sectional view of ■■-■ in FIG. 5, the material feeding cradle 2 is driven to
When the cam roller 20 rotates in the direction of the arrow γ, one to several pieces of the workpiece 3 are scooped into the recess 21, and the workpiece 3 is scooped into the slope material feeding section 30 adjacent to the front of the cam roller 20.
transported to.

The sloped material supply section 30 has a downward slope of, for example, 6 degrees with respect to the horizontal plane, and receives the workpiece 3 conveyed from the cam roller 20.
is conveyed to the chamfered part A (Figs. 1 and 5) side. Incidentally, the upper surface 31 of the inclined material supply section 30 is formed of a brass sheet metal in order to prevent scratches on the surface of the workpiece 3. As shown in FIG. 5, a stopper 32 is provided at the front end (lower side in FIG. 5) of the slope material supply section 30, and the workpiece 3 is placed at the stopper 32 at 1! They are stopped and lined up in parallel on the slope material supply section 30. Stopper 32
is the air cylinder 3 provided below the slope material supply section 30.
Driven by 3. As a result, the workpieces 3 are conveyed to the chamfer A one by one via the arm 46. The tip 46a of the arm 46 is shaped like a force 1 and is opened upward (
(See Figure 1). Note that the timing at which the air cylinder 33 operates is controlled by the control device 110.

The chamfering section A has first and second drill units 4 that perform chamfering work.
0.41. Each drill unit 40, 41 faces each other and moves in the direction of arrow δ (parallel to the center line C of the workpiece 3 fixed in the vise 44) on the bed 42, 43 installed on the main body 1. direction) so that it can move freely. The vice 44 is configured to clamp or unclamp the workpiece 3 in response to a signal from a proximity switch 45. Oblique. When the workpiece 3 is conveyed from the surface feeding section 30, the workpiece 3 is received by the tip 46a, and the proximity switch 45 sends a signal to operate the vice 44. 1st
, slide motors 47.48 are disposed at the rear ends of the second drill units 40.41 (both left and right ends in FIG. 5), and the slide motors 47.48 cause both drill units 4
0.41 is driven in the direction of arrow δ. Both drill units 40.41 are equipped with first and second chamfer cutters 49.50 that face each other concentrically at the center line CJ: of the workpiece 3 fixed to the vise 44. Each drill conite 40.
41 is equipped with a circuit 51 for detecting a contact/non-contact state between the first and second cutters 49 and 50 and the workpiece 3. The circuit 51 issues a signal to the control device 110 indicating the contact/non-contact state.

52 is a ray scale, which is connected to the controller 01 arranged on the control panel 100, and sends a signal to the controller 101 when two or more workpieces 3 enter the vise 44. Upon receiving this signal, the controller 101 stops the slide motors 47 and 48. SW 1SW2
A limit switch is used to detect the sliding position of each drill unit 40, 41 in the direction of arrow δ. 60.6
Reference numeral 1 denotes a carry-out arm, each of which is rotatably supported at rotations @63 and 64, flips up the workpiece that has been chamfered from the bottom to the top, and carries out the workpiece 3 from the chamfering section A. This is for transporting the product to the product cradle 70. The delivery arms 60, 61 are driven by an air cylinder (not shown). At the same time, the air cylinder is moved to the unloading arm 60,
The timing of driving 61 is controlled by control device 110.

Next, a control mechanism for controlling the chamfered portion A will be explained. As shown in FIG. 7, which is a conceptual diagram of the control mechanism of the chamfering section A of the present invention, when operating the fully automatic double-end chamfering machine, the control device 1
10 shows the material diameter d, material length Q, and chamfering conditions of the workpiece 3,
That is, the values of the chamfers 111Q 1 and Q and the leading angles a and a2 are input in advance.The subscript t in the above reference numerals indicates the first and second types of each drill unit 40 and 41, respectively.

S S is the chamfer shape 1' stored in the control device
2 indicates the difference between the first and second drill units 40.4
The structure is such that the chamfer shape can be selected for each.

Next, the operation will be explained. As shown in FIG. 1, 10 tons of work material 3 is placed in the material feeding cradle 2. Circuit 51 (
In FIG. 5), the material diameter d, material length 1, and chamfering conditions of the workpiece 3 are input. During operation, the gear A7 motor 27 always rotates at a predetermined number of rotations. When automatic control starts,
The bushing rod 10 of the power cylinder 9 protrudes in the direction of the arrow α, and the material supply cradle 2 rotates in the direction of the arrow β around the support shaft 7. Therefore, the workpiece 3 is fed towards the cam roller 20. The cam roller 20 is a guard motor 27
Since the cut material 3 supplied from the material supply cradle 2 is scooped up by the recess 21 and conveyed to the slope material supply section 30. The work material 3 conveyed to the slope material supply section 30 is stopped by a stopper 32. The air cylinder 33 that drives the stopper 32 is controlled by the control device 110.
The stopper 32 is driven at a predetermined timing calculated by (FIG. 5). Therefore, the workpieces 3 are conveyed to the chamfering section A one by one via the arms 46. When the workpiece 413 is sent to the tip 46a of the arm 46, the proximity switch 45
(FIG. 5) sends a signal to controller 110. Control device 1
10 receives this signal and sends a signal to the vise 44 (FIG. 5) to clamp the workpiece 3. When the vise 44 is in the clamped state, the control device 110 determines the distance to rapidly feed and the distance to feed the slide motors 47 and 48 from the condition values of the workpiece 3 (material diameter d, material length 1, chamfering conditions). Each is calculated and a signal is sent based on the calculated value. When the slide motors 47, 48 are driven by the above signal, the drill units 40, 41 are rapidly forwarded by a distance determined by the calculated value, and then are fed for cutting. Furthermore, after changing to cutting feed, both drill units 40.41
When the first and second chamfering cutters 49, 50 (FIG. 5) come into contact with the workpiece 3, a signal is sent to the control device 110 by the circuit 51 contained in both drill units 40, 41. At this stage, the first and second chamfer cutters 49.50
has not yet been rotated. When both the first and second chamfer cutters 49.50 come into contact with the workpiece 3 and the signal is sent to the control device 110, the control device 110 starts the first and second chamfer cutters 49.50 for the first time. The machine is driven and chamfering work begins.

Therefore, even if there are variations in the length 1 of the workpiece 3, the chamfering work and the double-sided chamfering cutter 47.48 will always cut the workpiece t14.
Since this is done after contact with the chamfered hole 3, there will be no variation in the chamfered opening.

When the chamfering work is completed, the vise 44 is released! In this state, the workpiece vJ3 is placed on the arm 46.

Next, the carry-out arm 60 rotates about the rotating shaft 63 in the direction of arrow ε, scoops up the workpiece 3, and carries it out onto the carry-out arm 61. The roughly unloading arm 61 rotates in the direction of the arrow ζ around the rotating shaft 64, and transfers the workpiece 3 to the product cradle 70.
and the work is completed. Note that when two or more pieces of the workpiece 3 are conveyed to the arm 46 by the blades of the workpiece 3, the ray scale 52 (FIG. 5) detects this and sends a signal to the control 211 device 110. After receiving a signal from outside the control device 110t ( ), the carry-out arm 61 is first rotated, and then the carry-out arm 60 is rotated to carry out the workpiece 3 from the chamfered portion A. Therefore, the workpiece 3 is dropped into the carry-out pallet 65 directly below the carry-out arm 61.

(Effects of the Invention) As explained above, according to the present invention, the chamfered portion main body 1 includes:
A supply cradle 2 in which the workpiece 3 is placed, a chamfered part △ that cuts both edges of the workpiece 3, and a constant supply of the workpiece 03 from the supply cradle 2 to the chamfered part A. In the automatic double-end chamfering mode equipped with a mechanism, the chamfering part A is provided with a pair of first and second drill units 40 and 41 that are slidably driven in the longitudinal direction of the workpiece 3, Drill unit 40.4
1 is provided with first and second chamfer cutters 49,50 facing each other concentrically on the center FAC of the workpiece 3,
A circuit 51 is provided to detect the contact/non-contact state between the chamfering cutter 49.50 and the workpiece 3, and the double-sided chamfering cutter 47.4
The chamfering operation is performed only when both of the 8 come into contact with the metal workpiece 3, and the same or different chamfering conditions (chamfering machines Q1, Q, tip angles a, a2) are applied to the first, Control device fif 110 for instructing the second drill unit 40.41
(1) Even if there are variations in the length of the workpiece 3, the chamfering work is performed after the double-sided chamfering cutter 49.50 comes into contact with the workpiece 3, so the amount of chamfering No variations occur.

(2) Set the chamfering conditions (chamfer amount Ql, Q2, tip angle a, a2) of the workpiece 3 to each drill unit 40, 41fO.
Therefore, it is possible to specify a variety of chamfers 11 and chamfer shapes.

(3) Furthermore, the quantitative supply mechanism has one or more recesses 2.
1 (22),
One cam roller 20 is fixed to a rotating shaft 23 at a constant interval at a position facing the recess 21 (22) formed in the other cam roller 20, and the rotating shaft 23 is located near the material feeding cradle 2 and in the vicinity of the material feeding cradle 2. When adopting a structure in which the cut material 3 is arranged approximately parallel to the work material 3 supplied to the work material 3, there is no risk of the work material 3 getting entangled when the work material 3 is transported.
This has the advantage of improving work efficiency.

[Brief explanation of drawings]

Claims (2)

[Claims] (1) A material feeding cradle in which a rod-shaped metal workpiece is placed in the chamfering part main body, a chamfering part that cuts both edges of the metal workpiece, and a chamfering part from the material feeding cradle to the chamfering part. In a fully automatic double-end chamfering machine equipped with a quantitative supply mechanism for supplying a fixed amount of metal workpiece material to a 1. A second drill unit is provided, and both drill units are provided with first and second chamfer cutters facing each other concentrically on the center line of the workpiece, and each of the first and second chamfer cutters and the workpiece are A circuit is installed to detect the contact/non-contact state with the metal workpiece, and the chamfering operation is performed only when both the double-sided bevel cutters come into contact with the metal workpiece, and the same or different chamfering conditions are A fully automatic double-end chamfering machine characterized by comprising a control device for instructing a second drill unit. (2) The quantitative supply mechanism includes a plurality of cam rollers each having one or more recesses, and one cam roller is fixed to the rotating shaft at a constant interval at a position facing the recesses formed in the other cam rollers. 2. The fully automatic double-end chamfering machine according to claim 1, wherein the rotating shaft is disposed near the material supply cradle and approximately parallel to the workpiece supplied to the material supply cradle.