JP4170499B2 - Trim mold flame treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flame treatment apparatus that increases the hardness of a blade portion of a mold.
[0002]
[Prior art]
As a technique for increasing the hardness of a die blade, for example, Japanese Patent Laid-Open No. 8-57559, “Press Die Processing Method” is known. As shown in FIG. 1 of the publication, the apparatus used in this processing method is a bed 1, a table 2 disposed above the bed 1, a movable frame 4, a processing head 5, and a processing attached to the processing head 5. A tool 6 and a build-up device 7 supported on the table 2 are provided.
[0003]
The processing method is as shown in page 3, left column, line 1 to left column, line 17 of the publication. A summary of these is shown below.
(A) First, the machining tool 6 is attached to the machining head 5 and the mold material W is cut as shown in FIG.
(B) Next, the build-up tool 7 is replaced with the processing head 5, and the material suitable for the blade part is built up in the lacking part Wa as shown in FIG. 3 (b).
(C) After the build-up, the machining tool 6 is replaced with the machining head 5 again, and the built-up portion Wb is finished into a blade shape as shown in FIG.
[0004]
[Problems to be solved by the invention]
In said technique, the hardness of a blade part can be made higher than a main body (base material) by performing build-up welding. However, since the build-up welding and the finishing process of the build-up part are performed, it takes time to process the mold, and the production efficiency is poor.
[0005]
There is flame quenching (frame hard) to eliminate the build-up welding and ensure the hardness. An operator himself or a flame quenching apparatus injects a flame of a burner onto a workpiece and heats (heat treats) it.
However, in the manual work performed by the worker, since the burner is held for a long time, the heating temperature is likely to vary, and there is a concern that the hardness may be uneven. Furthermore, since flame quenching requires skill in temperature control, unevenness in hardness is likely to occur for those with little experience.
In the flame quenching apparatus, the shape of the workpiece is limited. In addition, the work needs to be transported to the flame quenching apparatus, and the installation to the flame quenching apparatus also takes place, which is troublesome and the production efficiency is poor.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a trim mold flame treatment apparatus in which the hardness of the blade portion is stable and the production efficiency is good.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is directed to a burner for injecting a flame to hard-treat a blade portion of a trim mold used when trimming a drawn workpiece, and the burner is parallel to the trim line. Burner moving means for moving.
[0008]
Since mechanization is achieved by the burner moving means and the burner is automatically moved along the trim line of the trim mold, unevenness in hardness due to the difference in skill level does not occur.
The distance from the blade portion to the burner and the burner feed speed are controlled by the burner moving means, and the blade portion is heated while moving along the trim line, so that the temperature is stabilized.
[0009]
According to a second aspect of the present invention, the burner moving means is an NC processing machine, and a burner is attached to a processing head of the NC processing machine.
The trim mold is finished with the cutting tool of the NC (numerical control) machine, the tool is changed from the cutting tool to the burner, and then the blade is heated with the burner. Since cutting and flame quenching are performed on the table of the NC machine, there is no need to transport the trim mold.
[0010]
Also, the burner distance and burner feed speed are controlled by the NC program of the NC machine, and the blade part is heated while moving along the trim line, so the edge of the blade part is heated too much locally. At the same time, the variation in heating temperature is extremely small.
Furthermore, since the NC machine performs the burner feed operation by automatic control, it is not necessary for the operator to hold the burner and keep the heating posture for a long time. At the same time, there is no unevenness in hardness due to differences in skill level.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a flame treatment apparatus for a trim mold according to the present invention, where X is the moving direction of the table 22, Y is an axis orthogonal to X, and Z is a vertical axis orthogonal to X and Y. It is.
The flame treatment apparatus 10 for a trim mold moves a burner 40 that injects flame to the blade portion 12 of the trim mold 11 that is used when trimming a drawn workpiece, and moves the burner 40 in parallel to the trim line 13. Burner moving means 20.
[0012]
The burner moving means 20 is an NC processing machine. Specifically, the NC processing machine 20 includes a base 21, a table 22 attached to the base 21 so as to be movable in the X-axis direction, and both sides of the table 22. A column 23 arranged at the top, a cross rail 24 fixed to the column 23, a main shaft portion 25 attached to the cross rail 24 so as to be movable in the Y-axis direction, and movable to the main shaft portion 25 in the Z-axis direction The main shaft 26 and the machining head 27 provided, a control panel 28 and an operation panel 29 for controlling movement (cutting conditions) of three axes of the X axis, the Y axis, and the Z axis, and a plurality of cutting tools 31. -Indicates a plurality. The same applies hereinafter.) And an automatic tool changer (ATC) 32 for changing.
[0013]
The automatic tool changer 32 includes a tool magazine 33 and a changer arm 63, and the tool magazine 33 stores a plurality of cutting tools 31 in advance. The changer arm 63 will be described in detail with reference to FIG.
In the figure, 34 is an oxygen cylinder, 35 is an acetylene gas cylinder, 36 and 36 are hoses, 37 and 37 are reels that tension the hose 36, 38 and 38 are pressure gauges, and 39 is a hose guide provided on the processing head 27. .
[0014]
FIG. 2 is a front view of a burner (first embodiment) according to the present invention. The burner 40 includes an oxygen inlet 41, an oxygen valve 42, an acetylene gas inlet 43, an acetylene gas valve 44, a burner body 45, It comprises a crater 46 attached to the burner body 45 and a bracket 47 that supports the burner body 45. A holder 48 is detachably attached to the machining head, and 49 is a quick joint. The quick joint 49 is a joint for connecting a hose and can be quickly attached and detached.
[0015]
The bracket 47 has a shaft part 51 for attaching to the holder 48 at the upper part and a clamp part 52 for attaching the burner body 45 to the lower part. The clamp portion 52 supports the concentricity of the shaft center 54 of the crater 46 in alignment with the shaft center 53 of the holder 48.
The quick joint 49 includes plugs 55 and 55 attached to the oxygen inlet 41 and the acetylene gas inlet 43, and sockets 56 and 56 attached to the hoses 36 and 36.
[0016]
Next, the operation of the trim mold flame treatment apparatus described above will be described.
FIGS. 3A to 3C are first operational views of the flame treatment apparatus according to the present invention.
In (a), the cutting tools 61 and 62 and the burner 40 are stored in the tool magazine 33, and the created NC program is input (online or FD or the like) to the control unit. Since the burner 40 has a size substantially equal to the outer diameter of the holder 48 including the bracket 47, the burner 40 can be easily stored without interfering with the ready-made tool magazine 33.
[0017]
In (b), the material of the trim mold 11 is set on the table 22, the cutting tool 61 is attached to the machining head 27 (or the main shaft 26), the tool is changed to the cutting tool 62 by an automatic tool changer, and then The trim line 13 is formed simultaneously with finishing the blade portion 12. When the cutting of the trim mold 11 is completed, the main shaft 26 reaches the automatic tool changer.
[0018]
In (c), the automatic tool changer 32 changes the tool from the cutting tool 62 to the burner 40. Specifically, first, one end 64 of the changer arm 63 in the automatic tool changer 32 is fitted to the cutting tool 62 and descends as shown by the arrow (1), and the cutting tool 62 is removed from the machining head 27. Next, the changer arm 63 is rotated as indicated by the arrow (2), and the burner 40 previously extracted from the tool magazine and hung on the other end 65 is made to face the machining head 27. Subsequently, the changer arm 63 rises as shown by the arrow (3), the holder 48 is fitted to the machining head 27, and the burner 40 is attached. When the tool change is completed, the main shaft 26 leaves the automatic tool changer 32 and faces the trim mold.
[0019]
4 (a) and 4 (b) are second operational views of the flame treatment apparatus according to the present invention.
In (a), hoses 36 and 36 are connected to the burner 40 facing the trim mold 11. Specifically, hoses 36 and 36 are passed through a hose guide 39 provided on the main shaft 26, and are connected by quick joints 49 and 49. Then, the burner 40 (mixture of oxygen and acetylene) is ignited by the igniter 66.
[0020]
Since the quick coupling 49, the connection of the hose 36 is easy. Further, since the hose guide 39 separates the hoses 36 and 36 from the burner 40, the hoses 36 and 36 are not affected by heat. Further, since the reels 37 and 37 (shown in FIG. 1) always pull the hoses 36 and 36, the hoses 36 and 36 are not trimmed even if the burner 40 moves in the X-axis direction and the Y-axis direction. There is no risk of burning.
[0021]
In (b), the flame 67 (oxygen acetylene flame) is adjusted (standard flame) with the oxygen valve 42 and the acetylene gas valve 44 of the burner 40, and the NC program is started. The burner 40 heats the position offset by a predetermined distance S from the finishing locus of the cutting tool 62 by the NC program.
Since the axis of the crater 46 is concentric with the main shaft 26, the NC program of the cutting tool 62 can be used, and can be easily offset by a predetermined distance S. As a result, it takes less time to create the NC program.
[0022]
FIG. 5 is an enlarged view of part 5 of FIG. The NC program offsets the crater 46 from the trim line 13 of the trim mold 11 by a predetermined distance L (for example, 2 to 3 mm), and at the same time moves the crater 46 away from the upper surface of the blade portion 12 by a predetermined distance H1 (for example, about 25 mm) ( (Z-axis direction) and the blade portion 12 is heated. When the crater 46 is separated by a predetermined distance H1, a portion whose temperature is slightly lower (about 2900 ° C.) than the distance H2 where the temperature of the flame 67 is maximum (about 3000 ° C.) is used. It becomes relatively easy.
[0023]
Further, when the crater 46 is offset by a predetermined distance L, heat propagates from the side having the larger heat capacity toward the edge 68 of the blade portion 12 having the smallest heat capacity as indicated by the arrow (4), and therefore heat is concentrated on the edge 68. There is no worry of melting the edge 68. Furthermore, the range of quenching can be widened by the propagation of heat.
Note that the predetermined distance H1 is a guide, and fine adjustment is required by adjusting the flame 67 (mixing ratio).
[0024]
FIG. 6 is a third operation view of the flame treatment apparatus according to the present invention.
By offsetting the trim line 13 (edge 68) by a predetermined distance L and sending the table 22 at a predetermined speed V1 in the X-axis direction as indicated by the arrow (5), the blade 12 is heated to a predetermined temperature, and the blade 12 Flame quenching is performed to form a quenching portion 69. When the direction of the blade portion 12 changes, the main shaft is sent at a predetermined speed V2 (V1 = V2) in the Y-axis direction by the cross rail 24 (shown in FIG. 1), as shown by an imaginary line. Flame quenching can be performed on the entire length of the blade portion 12 with the burner 40. When the flame quenching is completed, the burner 40 is returned to the tool magazine in the reverse procedure.
[0025]
Since the burner 40 is sent by the flame treatment apparatus, the temperature variation of the blade portion 12 is extremely small, and there is no fear that the hardness of the blade portion 12 becomes uneven.
In addition, since the burner feed operation is automatically controlled using a cutting program of the NC machine, it does not take time to create the program. As a result, production efficiency is improved.
Furthermore, since an NC processing machine is used, there is no need to purchase a new device with an NC (numerical control) device, and the production cost of the mold does not increase.
In addition, in the case of a mold that requires build-up, build-up welding can be performed by exchanging the tool from the cutting tool to the welding apparatus. Since build-up welding and flame quenching are performed on the table of the NC processing machine, the transportation of the mold can be further omitted.
[0026]
Next, another embodiment of the burner according to the present invention will be described.
FIG. 7 is a front view of a burner (second embodiment) according to the present invention. The same components as those in the embodiment shown in FIG.
The burner 40B includes a burner body 45, a crater 46 attached to the burner body 45, a bracket 47 for supporting the burner body 45, an ignition electrode 71 attached to the lower portion of the bracket 47, and a flame detection for detecting flames. 72, a stocker 73 disposed on the table 22 to support the holder 48, and a burner presence / absence detector 74 that is attached to the upper portion of the stocker 73 and detects the presence / absence of the burner 40B. Reference numerals 75 and 75 denote cables for the ignition electrode 71 and the flame detector 72.
[0027]
In the case of the burner 40B, an electromagnetic valve is provided between the hose 36 and the pressure gauge 38 shown in FIG. This solenoid valve is opened by a position signal when the burner 40B reaches a predetermined position (X axis, Y axis) near the trim mold and ignites.
[0028]
Next, the operation of the burner 40B (second embodiment) will be described.
After cutting the trim mold, the cutting tool is returned to the tool magazine, and the spindle 26 is sent to the stocker 73 on the table 22. Then, by lowering the main shaft 26 as shown by the arrow (7), the holder 48 is fitted to the machining head 27 and the burner 40B is attached. Subsequently, the main shaft 26 moves horizontally, removes the holder 48 from the stocker 73, and faces the blade of the trim mold as indicated by the arrow (8).
[0029]
When the trim mold is reached, the ignition electrode 71 is activated, and the burner 40B (electromagnetic valve excitation (gas / oxygen)) is automatically ignited. At that time, the flame detector 72 confirms the ignition, and when the ignition is completed, heating of the blade portion is started. When the flame quenching is completed and the burner 40B is returned to the stocker 73, the burner presence / absence detector 74 outputs an “accommodation complete” signal, and the machining head 27 releases the holder 48.
[0030]
Since everything from the trim die cutting to the flame quenching of the blade portion is performed fully automatically, there is no need for the operator to intervene on the way and the burden on the operator can be reduced. Moreover, since there is no time for stagnation, production efficiency can be improved.
[0031]
The NC processing machine shown in FIG. 1 according to the embodiment of the present invention is not limited to this, and may be any NC machine tool used for cutting a mold.
The burner in FIG. 2 is not limited to this, and the type of the burner is arbitrary. Further, acetylene may be replaced with another gas such as propane.
The flame treatment apparatus is not provided with a cooling means for rapid cooling after the temperature rise, but the cooling means can be omitted by using a mold material that does not need to be rapidly cooled. However, it is optional to provide a cooling means depending on conditions.
[0032]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
In the first aspect of the present invention, the burner moving means is exchangeable concentrically with the cutting tool for cutting the trim mold, and moves based on a program in which the movement locus of the program used for cutting is offset by a predetermined distance. Further, mechanization is achieved by the burner moving means, and the burner is automatically moved along the trim line of the trim mold, so that unevenness in hardness due to the difference in skill level does not occur.
The burner moving means replaces the burner concentrically with the cutting tool, and based on the program in which the moving locus of the program used for cutting is offset by a predetermined distance, the distance from the trim mold blade to the burner, and The blade is heated while controlling the feed rate of the burner and moving along the trim line, so that the temperature is stabilized.
Therefore, the hardness of the blade portion is stabilized, and there is no worry about unevenness in hardness.
Moreover, the program of a cutting tool can be utilized and it can be made to offset only a predetermined distance easily. As a result, it takes less time to create a program.
[0033]
According to the second aspect, the blade portion of the trim mold is finished with a cutting tool of an NC (numerical control) machine, the tool is changed from the cutting tool to the burner, and then the blade portion is heated with the burner. Since cutting and flame quenching are performed on the table of the NC processing machine, it is not necessary to transport the trim mold as in the prior art, and the labor of transporting can be saved. As a result, the processing can be consolidated and the production efficiency of the mold can be improved.
Also, the burner distance and burner feed speed are controlled by the NC program of the NC machine, and the blade part is heated while moving along the trim line, so the edge of the blade part is heated too much locally. No, heat propagates to a relatively wide range, and hardenability is improved. At the same time, since the variation in the heating temperature is extremely small, there is no fear of uneven hardness.
[0034]
Further, since the NC processing machine performs the burner feeding operation by automatic control, it is not necessary for the worker to hold the burner and keep the heating posture for a long time as in the conventional case, and the burden on the worker can be reduced. At the same time, there is no unevenness in hardness due to differences in skill level.
In addition, since the burner feed operation is automatically controlled using the NC program of the NC processing machine, teaching of a robot or the like is not required, and the program creation is not time-consuming. Furthermore, by exchanging tools with the welding equipment, build-up welding can be performed on the NC machine table, so that mold build-up and quenching can be performed continuously in one process, and transfer between work processes is possible. There is no work. Therefore, production efficiency is improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a flame treatment apparatus for a trim mold according to the present invention. FIG. 2 is a front view of a burner (first embodiment) according to the present invention. Fig. 4 is a second operation diagram of the flame treatment apparatus according to the present invention. Fig. 5 is an enlarged view of part 5 of Fig. 4B. Fig. 6 is a third operation diagram of the flame treatment apparatus according to the present invention. 7: Front view of burner according to the present invention (second embodiment)
DESCRIPTION OF SYMBOLS 10 ... Flame treatment apparatus, 11 ... Trim mold, 12 ... Blade part, 13 ... Trim line, 14 ... Burner moving means, 20 ... NC processing machine, 26 ... Main shaft, 37 ... Reel, 40, 40B ... Burner, 47 ... Bracket, 54 ... axis of crater, 67 ... flame, L ... distance from trim line.

Claims (2)

A trim mold comprising a burner for injecting flame to hard-treat the blade of a trim mold used for trimming a drawn workpiece, and burner moving means for moving the burner parallel to the trim line A flame treatment apparatus ,
The burner moving means may be exchanged concentrically with a cutting tool for cutting the trim mold, and the burner moving means moves based on a program in which a moving locus of a program used for cutting is offset by a predetermined distance. Trim mold flame treatment equipment.   The flame treatment apparatus for a trim mold according to claim 1, wherein the burner moving means is an NC processing machine, and the burner is attached to a processing head of the NC processing machine.

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