JP2008036638A - Method for aligning forging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for aligning a forging machine, wherein an amount of deviation of alignment can precisely be obtained in a position where the forging work is practically performed with a die and a punch, and the workability of the alignment work is remarkably improved. <P>SOLUTION: The forging machine is provided with: a base; a die-holder arranged at the base; the die exchangeably mounted on the die holder; a ram reciprocating to the base; a punch-holder arranged in the ram; and the punch which is exchangeably mounted on the punch holder and performs the forging work together with the die, wherein a distance detection means (an instrument 1 for detecting the distance) is mounted in place of one of the die and the punch and a member to be detected (a jig 5 to be detected) is mounted in place of the other, and the ram is moved, and the amount of deviation of alignment is obtained by detecting the distance between the distance detection means (a distance sensor 31 for perpendicular direction) and a member to be detected (a member 6 to be detected), and the positioning adjustment is performed by at least one of the die-holder and the punch-holder, based on the amount of deviation of alignment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a forging machine centering method in which a workpiece is forged by a die and a punch.

  In a cold forging machine such as a forging machine or a press machine, a workpiece is forged between a fixed die called a die and a movable die called a punch to produce a part having a predetermined shape. The die is mounted on the die holder, the punch is mounted on the punch holder, and both are exchanged as needed according to the shape of the parts to be manufactured. . In general, the die holder is provided on the base, the punch holder is provided on the reciprocating ram, and at least one of the die holders is adjustable in position so that the misalignment can be adjusted.

  In a conventional centering operation, a jig called a centering rod is frequently used. The centering rod has a hole corresponding to the outer diameter of the punch in the shaft core, and is mounted on the die holder instead of the die. After attaching the centering rod to the die holder, the operator moves the ram little by little to the front dead center and repeats position adjustment so that the punch fits smoothly into the hole of the centering rod. I am going out. In addition, when a load is actually applied to the workpiece, misalignment may occur. In many cases, dynamic centering is performed in which a trial operation is performed to check the state of the axis of the prototype.

Moreover, in order to support the operator's centering work, for example, position detection devices disclosed in Patent Document 1 and Patent Document 2 have been put into practical use. In Patent Document 1, the position detection device is provided on a movable base (ram), and is configured to detect the relative position of a movable mold (punch) attached so as to be position-adjustable. In Patent Document 2, in order to detect the position of a punch attached to the front surface of the ram via a punch case (punch holder), a detection guide is provided in the position adjustable punch case, and the front center on the ram side is provided. A detection head is protruded from the part to detect the relative positional relationship between the detection guide and the detection head. In both cases, the position adjustment work is facilitated by quantitatively displaying the displacement amount corresponding to the misalignment amount.
Japanese Patent No. 3035175 Utility Model Registration No. 3123101

  By the way, in the conventional centering operation, the amount of misalignment between the punch and the hole of the centering rod is visually determined or touched with the hands to make a sensuous judgment and perform static centering adjustment. The workability was poor and skill was required. In addition, the dynamic centering adjustment by trial operation is difficult to improve the accuracy because the center position changes depending on the part shape, and requires time and effort. On the other hand, since the position detection device detects the amount of displacement at a location different from the actual position where the punch and the die face each other, there is a difficulty in causing an error in the misalignment amount.

  The present invention has been made in view of the above background, and can accurately determine the amount of misalignment at the position where the die and punch are actually forged, and has greatly improved the workability of the centering operation. A method for centering a forging machine is provided.

  The forging machine centering method of the present invention includes a base, a die holder provided on the base, a die exchangeably mounted on the die holder, a ram reciprocating relative to the base, In a forging machine comprising: a punch holder provided in a ram; and a punch that is exchangeably mounted on the punch holder and performs forging with the die. An axial center of the opposing die and the punch is provided. In the centering method to adjust, at least one of the die holder and the punch holder can be adjusted in position, a distance detecting means is mounted instead of one of the die and the punch, the ram is operated, By detecting the distance between the distance detecting means and the other of the die and the punch, an amount of misalignment is obtained, and the die holder and the punch holder are determined based on the misalignment amount. Adjusting the position in the contrast even without, characterized in that.

  The centering method of the forging machine according to the present invention includes a base, a die holder provided on the base, a die that is replaceably mounted on the die holder, and a ram that reciprocates with respect to the base. In a forging machine comprising: a punch holder provided in the ram; and a punch that is replaceably mounted on the punch holder and performs forging between the die and the shaft of the die and the punch facing each other A centering method for adjusting a core, wherein at least one of the die holder and the punch holder is adjustable in position, and a distance detecting means is mounted in place of one of the die and the punch, and the other is replaced. The detected member is mounted, the ram is operated, the distance between the distance detecting means and the detected member is detected, the amount of misalignment is obtained, and the die is based on the amount of misalignment. Folder and performs at least one in positional adjustment of the punch holder, may be.

  In the present invention, a distance detecting jig is originally mounted at a position where a die or a punch is mounted, and an amount of misalignment is obtained at an actual position where the die and the punch are opposed to each other. It is characterized by being able to do it. The present invention can be applied to a forging machine having a general structure including a base, a die holder, a die, a ram, a punch holder, and a punch. The die mounting position of the die holder and the punch mounting position of the punch holder may be fixed, but the position where at least one of the die holder and the punch holder is provided can be adjusted, and the axis of the die and the punch can be adjusted. It is necessary to be.

  In the present invention, distance detection means is prepared as a jig for centering work. The distance detection means can be provided on a detection base having mounting compatibility so that it can be mounted instead of a die or a punch. Further, as a specific means for distance detection, for example, a non-contact detection type distance sensor such as a magnetic field type or an optical type can be applied.

  In the centering method for a forging machine according to the present invention, first, instead of one of the die and the punch, a distance detecting means is mounted at the mounting position. Next, the ram is operated to detect the distance between the distance detecting means and the other of the die and the punch. At this time, the detection accuracy can be improved by operating the ram to the front dead center at the time of forging and bringing the distance detection means close to the other. Further, the operation of the ram is different from the constant reciprocation during forging, so that detection accuracy can be improved and adjustment work can be facilitated. For example, it can be manually operated little by little from the rear dead center to the front dead center, or can be operated at a low speed. Furthermore, the detection error can be reduced by performing the distance detection a plurality of times to obtain the average value.

  Next, the misalignment amount is obtained from the detected distance. For example, the amount of misalignment in the horizontal direction can be obtained by detecting the distance in both the left and right directions and comparing the magnitudes. Or it is good also as a misalignment amount by calculating | requiring the difference with the design true value. Next, position adjustment is performed on at least one of the die holder and the punch holder based on the misalignment amount. At this time, since the amount of misalignment is quantitatively determined, adjustment can be easily performed without requiring skilled skills such as visual judgment. For example, when the position is adjusted by tightening the adjusting screw, the rotation angle to be narrowed down can be obtained by dividing the misalignment amount by the screw pitch. Finally, the distance detection is performed again to confirm the coincidence of the shaft cores. If they do not coincide, fine adjustment is performed again.

  Note that a member to be detected may be prepared as a jig and attached instead of the other of the die and the punch. In this aspect, it is preferable that the distance detecting means is provided on at least one surface of a rectangular rod-shaped detection base, and the detection target member has a detection hole having a rectangular cross section through which the detection base enters and exits by the operation of the ram. . Furthermore, it is preferable to use a plurality of the distance detection means to detect distances in a plurality of directions substantially orthogonal to each other.

  In the case of using the detection member, the distance detection means can be provided on at least one surface, preferably a plurality of surfaces, of the rectangular rod-shaped detection substrate, and the detection member is formed with a detection hole portion having a rectangular cross section through which the detection substrate enters and exits. be able to. As an easy-to-understand example, the detection substrate and the hole to be detected can be configured to have concentric square sections and detect distances in the horizontal and vertical directions. Then, the detection base body enters the detected hole by the operation of the ram, and if there is no misalignment, the same fixed distance is detected vertically and horizontally. On the other hand, if a value different from this fixed distance is detected, the difference can be obtained and used as the amount of misalignment, and the position can be adjusted easily. Further, as the third direction substantially orthogonal, the distance in the axial direction in which the detection base body enters and exits may be detected to confirm the position of the front dead center of the ram.

  The distance detection means may comprise a coil part that generates an alternating magnetic field and a magnetic field detection part that detects a magnetic field.

  As the distance detection sensor, a magnetic field type distance sensor that includes a coil unit that generates an alternating magnetic field and a magnetic field detection unit that detects a magnetic field and can perform non-contact detection can be used. The outline of the detection method of the magnetic field type distance sensor is as follows. When an AC magnetic field formed by the coil portion is applied to a metal detection member (or the other of the die and the punch), an eddy current corresponding to the magnetic field flows. Furthermore, an induced magnetic field is induced by the eddy current and acts to cancel the initial magnetic field formed by the coil portion. Therefore, the magnetic field detected by the magnetic field detector decreases. Here, the smaller the distance between the coil portion and the member to be detected, the larger the magnetic field and eddy current in the member to be detected, and the detected magnetic field decreases. Therefore, the distance can be detected quantitatively. .

  In a forging machine including a plurality of sets of the die holder and the punch holder, the distance detecting means is mounted in one of the sets, the die and the punch are mounted in the other set, and the ram is operated. The center misalignment amount of the specific group may be obtained while forging the group.

  In a multistage forging machine including a plurality of sets of die holders and punch holders, a distance detecting means can be mounted in a specific group, and regular punches and dies used for forging can be mounted in another group. Then, the misalignment amount of a specific group can be obtained while performing forging by actually applying a load to the workpiece in another group. At this time, the operation of the ram may be the same as that during actual forging, or may be a unique operation in accordance with the constraint condition of distance detection. As a result, dynamic centering can be easily performed with high accuracy.

  In the above-described centering method of the forging machine according to the present invention, the distance detecting means is mounted instead of one of the die and the punch, and the detected member is mounted instead of the other as necessary to determine the misalignment amount. In addition, since the amount of misalignment can be obtained at the position where the die and punch perform forging, and quantitative and accurate detection can be performed, the workability of the centering operation can be greatly improved.

  Furthermore, in a multistage forging machine having a plurality of sets of die holders and punch holders, a dynamic core is obtained by determining the amount of misalignment of a specific group while performing forging while actually applying a load to the workpiece in another group. The feeding can be performed with high accuracy and ease.

  The best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a perspective view for explaining a distance detecting jig 1 used in the centering method of the present invention. FIG. 2 is a perspective view for explaining a detected jig 5 used in combination with the distance detecting jig 1. The distance detecting jig 1 and the to-be-detected jig 5 are used for centering work of a forging machine, and the former 1 is mounted instead of a die and the latter 2 is mounted instead of a punch. It has become.

  As shown in FIG. 1, the distance detection jig 1 is formed of a jig body 11 and a detection base 2 provided on the axis of the jig body 11. The jig main body 11 has a substantially cylindrical shape having the same length and the same diameter as the die, the shaft core is horizontally arranged, a notched wedge portion 12 cut out in a wedge shape at the upper portion, and a tap hole 13 directed toward the shaft core. A locking groove 14 is formed in the lower portion in the axial direction. The notched wedge portion 12 is for fixing the posture to be constant and stable when the distance detecting jig 1 is mounted on the die holder, and the locking groove 14 is for prohibiting unnecessary rotation. The tap hole 13 is for prohibiting a phase shift in the rotation direction between the jig body 11 and the detection base 2 by tightening a screw.

  The detection base 2 protrudes from the mounting hole of the axial center of the jig main body 11 to one cylindrical end face, and the tip has a rectangular bar shape having a square cross section with one side D1 = 10 mm. A vertical distance sensor 31 for detecting a vertical distance is embedded in the upper surface of the tip of the detection base 2, and a horizontal distance sensor 32 for detecting a horizontal distance is embedded in the side surface. The distance sensors 31 and 32 have a coil part and a magnetic field detection part, and have a detection accuracy of the order of (1/100) mm. The distance sensors 31 and 32 are connected to a power source and a monitor device (not shown) by a cable 33 drawn from the axial center of the distance detection jig 1 to the opposite cylindrical end surface so that power supply and signal extraction are performed. It has become.

  As shown in FIG. 2, the detection jig 5 is formed of a jig main body 51 and a detection member 6 provided on the shaft core. The jig body 51 has a substantially cylindrical shape having the same length and the same diameter as the punch, the shaft core is horizontally disposed, and a notched wedge portion 52 that is notched in a wedge shape is formed on the upper portion. The notch wedge portion 52 is for fixing the posture to be fixed stably when the jig 5 to be detected is mounted on the punch holder.

  The detected member 6 protrudes from the mounting hole of the axial center of the jig main body 51 to one cylindrical end face, and the tip has a rectangular tube shape having a detected hole 61 having a square cross section with one side D2 = 12 mm. It is a steel member. The to-be-detected hole portion 61 is disposed so as to face the detection base 2, and in an ideal centering state, the detection base 2 is fitted in the center while sharing the axis.

  Next, the schematic structure of the forging machine that performs the centering method of the present invention will be described with reference to FIG. FIG. 3 is a side sectional view for explaining the ram 91, punch holder 92, and punch 93 of the forging machine 9. In FIG. 3, the ram 91 reciprocates left and right, that is, reciprocates with respect to the base. A punch holder 92 is provided on the front surface (right surface in FIG. 3) of the ram 91 via a position adjustment unit 95. The position adjusting unit 95 adjusts the vertical and horizontal positions of the ram 91 and the punch holder 92. A punch 93 is mounted in the mounting hole at the lower center of the punch holder 92 and is stably fixed by a fixing screw 96 from above. An unillustrated die, a die holder, and a base are disposed on the right side of the punch 93. In addition, the position adjustment part is not provided between the die holder and the base, but is directly fixed.

  Next, the centering method of the forging machine 9 using the distance detecting jig 1 and the detected jig 5 will be described. First, in place of the punch 93 in FIG. 3, the detection jig 5 in FIG. 2 is mounted. Since the detection jig 5 has mounting compatibility with the punch 93, it can be stably fixed by the fixing screw 96. Similarly, the distance detecting jig 1 shown in FIG. 1 is mounted instead of the die. Next, when the ram 91 is operated at a low speed to the front stop point while paying attention to whether the detection base 2 hits the member 6 to be detected, the state shown in FIG. 4 is obtained.

  FIG. 4 is a side cross-sectional view for explaining a situation where the centering method of the present invention is carried out by a forging machine. When the ram 91 is moved to the front stop point, the distance detecting jig 1 approaches the detected jig 5 as shown in the figure, and the detection base 2 is inserted into the detected hole 61 of the detected member 6. Next, when an alternating magnetic field is generated in the coil portion of the vertical distance sensor 31, the magnetic field enters the opposed member 6 to be detected, and an eddy current flows because it is made of steel. Furthermore, an induced magnetic field is induced by the eddy current and acts to cancel the initial magnetic field formed by the coil portion. Therefore, the magnetic field detector of the vertical distance sensor 31 can detect a magnetic field that decreases in accordance with the distance from the detected member 6 and convert it to a distance. Here, since the detection base having one side D1 = 10 mm is inserted into the detected hole 61 having one side D2 = 12 mm, the distance detected when no misalignment occurs, that is, the design true value is ( 12−10) / 2 = 1 mm. On the other hand, if a misalignment occurs, a distance different from 1 mm is detected, so that the misalignment amount in the vertical direction can be obtained by subtracting 1 mm.

  Similarly, the horizontal distance sensor 32 (not shown) can detect the horizontal distance and obtain the horizontal misalignment amount. The amount of misalignment in the vertical direction and the horizontal direction can be confirmed with a monitor device connected to the cable 33. The operator can adjust the position of the punch holder 92, that is, the position of the detected jig 5 with the position adjusting unit 95 of FIG. 3 based on the misalignment amount.

  At this time, since the amount of misalignment in the vertical direction and the horizontal direction is accurately calculated at the position where the forging process is actually performed, it does not require empirical skilled skills such as visual judgment, and can be easily performed with high accuracy. Adjustment can be performed, and the workability of the centering operation can be remarkably improved.

  The detected jig 5 is not essential, and the distance may be detected from the distance detecting jig 5 with the punch or the die itself attached.

  Further, in a multistage forging machine having a plurality of sets of die holders and punch holders 92, the distance detection jig 1 and the detection jig 5 are mounted as described above in one set, and the dies and punches are mounted in another set. The amount of misalignment can be obtained while mounting and performing forging. By performing this dynamic centering, it is possible to perform highly reliable centering in consideration of the influence of the load during processing.

It is a perspective view explaining the jig for distance detection used for the centering method of the present invention. It is a perspective view explaining the to-be-detected jig | tool used in combination with the distance detecting jig | tool of FIG. It is side surface sectional drawing explaining the schematic structure of the forging machine which performs the centering method of this invention. It is side surface sectional drawing explaining the condition which is implementing the centering method of this invention with the forging machine.

Explanation of symbols

1: Distance detection jig 11: Jig body 12: Notched wedge
13: Tap hole 14: Locking groove 2: Detection base 31: Vertical distance sensor 32: Horizontal distance sensor 33: Cable 5: Jig for detection 51: Jig body 52: Notch wedge 6: Detection Member 61: Detected hole 9: Forging machine 91: Ram 92: Punch holder 93: Punch 95: Position adjusting unit 96; Fixing screw

Claims (6)

A base, a die holder provided on the base, a die exchangeably mounted on the die holder, a ram reciprocating relative to the base, a punch holder provided on the ram, and the punch In a forging machine equipped with a punch that is replaceably mounted on a holder and performs forging with the die, a centering method for adjusting the axial centers of the opposing die and the punch,
At least one of the die holder and the punch holder can be adjusted in position,
A distance detecting means is mounted instead of one of the die and the punch,
Operate the ram, determine the amount of misalignment by detecting the distance between the distance detecting means and the other of the die and the punch,
Adjusting the position of at least one of the die holder and the punch holder based on the misalignment amount;
A forging machine centering method characterized by the above. A base, a die holder provided on the base, a die exchangeably mounted on the die holder, a ram reciprocating relative to the base, a punch holder provided on the ram, and the punch In a forging machine equipped with a punch that is replaceably mounted on a holder and performs forging with the die, a centering method for adjusting the axial centers of the opposing die and the punch,
At least one of the die holder and the punch holder can be adjusted in position,
Attaching a distance detecting means instead of one of the die and the punch, and attaching a detected member instead of the other,
Operate the ram and determine the amount of misalignment by detecting the distance between the distance detecting means and the detected member,
Adjusting the position of at least one of the die holder and the punch holder based on the misalignment amount;
A forging machine centering method characterized by the above.   The distance detection means is provided on at least one surface of a rectangular rod-shaped detection base, and the detection target member has a detection hole having a rectangular cross section through which the detection base enters and exits by the operation of the ram. Forging machine centering method.   The forging machine centering method according to claim 1, wherein a plurality of the distance detection means are used to detect distances in a plurality of directions substantially orthogonal to each other.   The forging machine centering method according to claim 1, wherein the distance detection means includes a coil part that generates an alternating magnetic field and a magnetic field detection part that detects a magnetic field.   In a forging machine including a plurality of sets of the die holder and the punch holder, the distance detecting means is mounted in one of the sets, the die and the punch are mounted in the other set, and the ram is operated. The forging machine centering method according to claim 1, wherein the center misalignment amount of the specific group is obtained while forging is performed with the group.

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