JP2008240114A - Restrained quenching apparatus for thin plate member and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain deformation of a thin plate member when the thin plate member is quenched. <P>SOLUTION: In a restrained quenching apparatus for the thin plate member and a method therefor, the outer peripheral part (rim part 13) of the thin plate member 1 is placed on a ring-state workpiece-receiver 5 arranged at the end-face 36a side of a pressing center support tool 35 at one side and also, the shaft hole 15 of the thin plate member 1 is superposed on the end-face 32 of one pressing center 3 and the thin plate member 1 is moved to the other pressing center 2 provided to the other center supporting tool 25 facing the one pressing center supporting tool 35. The end-surface 22 of the other pressing center 2 is abutted on the thin plate member 1 and pressure is applied to the thin plate member 1. Further, this thin plate member 1 is induction-heated and quenched by an induction-heating coil 6 arranged at the other pressing center supporting tool 25 in a state in which the thin plate member 1 is restrained by pressure from the workpiece-receiver 5 and the end-face 22 of the other pressing center 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a constrained quenching apparatus for a thin plate member in which the outer diameter portion of a ratchet for a sheet of circular steel plate is processed into a thickness by press forming or flow forming to form a rim portion, and a tooth shape is formed on the rim portion. And its method.

In the conventional method for correcting the workpiece W of the annular member that has been deformed by the heat treatment of the preceding process, the pressing jig 102 is arranged in one direction opposite to the center of the workpiece W, and in opposite directions to each other. Advance and retreat. In the vicinity of the outer periphery of the workpiece W, an induction heating coil 103 that is a pair of upper and lower heating jigs is disposed at an upper and lower position sandwiching the pressing jig 102 so as to substantially cover the outer periphery. Then, the workpiece W is heated to a predetermined tempering temperature by the induction heating coil 103 while causing the workpiece W to be sandwiched and pressed from the outer shape side to cause elastic deformation. At this time, at least two or more outer diameters (or inner diameters) of the workpiece W are measured in advance before deformation correction, and deformation correction processing is performed on the workpiece W that is deforming based on the measurement result (of the workpiece W). A load is applied to at least one of the outer diameter surface and the inner diameter surface from the pressure jig 102 to correct the quenching deformation) (Patent Document 1).
JP 2001-11537 (paragraphs 0010, 0011 FIG. 1)

  However, in patent document 1, it heats and correct | amends, pressing from the outer side of the workpiece | work W. Therefore, in Patent Document 1, the pressure jig 103 for correcting quenching deformation is required, and the pressure jig 102 must be added to the apparatus for performing the heat treatment process. Therefore, the entire apparatus is complicated, and the heat treatment process becomes complicated. In this manner, a deformation correction process is added to the heat treatment process, and the pressure jig 102 for deformation correction must be operated, which is inefficient in terms of work efficiency.

  The present invention has been made in view of the above circumstances, and the constrained firing of a thin plate member that suppresses deformation of a workpiece simultaneously with heat treatment without adding a step only for correcting deformation of the workpiece by heat treatment to the heat treatment step. An object of the present invention is to provide an input device and a method thereof.

  In order to achieve the above object, the invention described in claim 1 includes one pressing center support jig and one pressing center support jig facing the pressing center support jig. In a constraining quenching apparatus for a thin plate member that sandwiches the thin plate member and induction heat quenches the thin plate member with an induction heating coil, the thin plate member is disposed on an end surface side of the one pressing center support jig. A ring-shaped workpiece receiver disposed to place the outer peripheral portion of the thin plate member, and when the outer peripheral portion of the thin plate member is placed on the ring-shaped workpiece receiver, the insert is inserted into the shaft hole of the thin plate member One pressing center provided in one of the pressing center support jigs and one pressing center are opposed to the surface of the edge of the shaft hole of the thin plate member. Contact The other pressing center provided in the other pressing center support jig and the other pressing center incorporated in the induction heating coil provided concentrically with the outer diameter portion of the other pressing center. And a core member provided so as to face the center.

  Therefore, according to the first aspect of the present invention, the shaft hole of the thin plate member is overlapped with the end surface of one pressing center provided in one pressing center supporting jig, and one pressing center supporting treatment is performed. The other part provided on the other pressing center support jig opposite to one pressing center support jig, with the outer peripheral portion of the thin plate member placed on a ring-shaped workpiece receiver disposed on the end face side of the tool The pressing center is moved to the thin plate member, the end surface of the other pressing center is brought into contact with the thin plate member, the thin plate member is pressed, and the end surface of the other pressing center is brought into contact with the thin plate member. The thin plate member is pressed by the workpiece receiver and the end surface of the other pressing center on the thin plate member, and the thin plate member is restrained, and the guide provided on the other pressing center side is The heating coil it is possible to heat quenching the thin plate member.

  According to the second aspect of the present invention, the axial hole of the thin plate member is overlapped with an end surface of one pressing center provided in one pressing center support jig, and one of the pressing center support jigs is overlapped. A step of placing the outer peripheral portion of the thin plate member on a ring-shaped workpiece receiver disposed on the end surface side of the first and second pressing center support jigs facing the pressing center support jig. The thin plate member placed on one of the pressing center support jigs is moved to the other pressing center, and the end surface of the other pressing center is brought into contact with the thin plate member to thereby reduce the thickness of the thin plate member. A step of applying pressure to the plate member; and the end surface of the other pressing center is brought into contact with the thin plate member to cause the thin plate member to receive a workpiece and the end surface of the other pressing center. A step of applying induction to the thin plate member and induction heating and quenching the thin plate member with an induction heating coil provided on the other pressing center side in a state in which the thin plate member is constrained. It is characterized by.

  Therefore, according to the invention described in claim 2, by pressing the end surface of the other pressing center against the thin plate member, the outer peripheral portion of the thin plate member is pressed from the work receiver, and the thin plate member Since the pressing from the end surface of the other pressing center is applied to the wheel portion of the other, and the direction in which each pressing is applied is opposite, the thin plate member is constrained, and the thin plate member is formed by the induction heating coil. It is possible to suppress the deformation of the thin plate member even if the is heated by induction.

  Furthermore, in the invention according to claim 3, in addition to the configuration according to claim 2, when the end surface of the other pressing center is brought into contact with the thin plate member, the pressing center of the other pressing center is The end face is in contact with the surface of the edge of the shaft hole of the thin plate member.

  Therefore, according to the third aspect of the invention, since the end surface of the other pressing center is brought into contact with the surface of the edge of the shaft hole of the thin plate member, the thin plate is brought into contact with the small portion of the thin plate member. It becomes possible to restrain the member in a balanced manner.

  In addition to the configuration according to claim 2 or 3, the invention according to claim 4 includes the other pressing center and the induction heating coil provided on the other pressing center support jig side. A core member is incorporated so as to face each other.

  Therefore, according to the invention described in claim 4, since the core member is incorporated in the induction heating coil so that the core member is provided between the induction heating coil and the other pressing center, the induction heating coil Since the induction heating by means of the core member does not directly reach the other pressing center, it is possible to prevent and protect the other pressing center from induction heating.

  According to the present invention, the pressure from the workpiece support of one pressing center support jig is applied to the outer peripheral portion of the thin plate member, and the pressure from the end surface of the other pressing center is applied to the wheel portion of the thin plate. In addition, the thin plate member is constrained, and even if the thin plate member is induction-heated by the induction heating coil in this state, the thin plate member can be prevented from being deformed and quenched. In this way, a jig or the like for correcting deformation of the workpiece, which is a thin plate member, is not required, and deformation of the workpiece can be suppressed simultaneously with the heat treatment, and the work efficiency of the heat treatment can be improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the thin plate member 1 which is an example of the workpiece used in this example is a wheel portion 12 formed by forming the outer periphery of a circular steel plate into a thick wall by forming, and the outer peripheral portion of the thin plate member. A rim 13 is formed. A tooth profile 14 is formed on the inner periphery of the rim 13 by pressing. As shown in FIG. 1, the wheel portion 12 has a dish shape, and the uneven portion is pressed into the dish shape. A shaft hole 15 is provided at the center of the wheel portion 12, which is the center of the thin plate member 1.

  In the apparatus 10 for quenching a thin plate member in this example, as shown in FIG. 2, one pressing center support jig 35 is provided with one pressing center (bar-shaped member) 3 and the other pressing center. The center support jig 25 is provided with the other pressing center (bar-shaped member) 2, and the thin plate member 1 is sandwiched between the pressing center 2 and the pressing center 3. The pressing center support jig 25 and the pressing center support jig 35 are provided so as to face each other, and both the pressing center 2 and the pressing center 3 have the pressing center support jig 25 and the pressing center support. Similar to the jig 35, the end surface 22 of the pressing center 2 and the end surface 32 of the pressing center 3 are provided so as to face each other.

  One pressing center support jig 35 is composed of a bowl-shaped collar part 36 and a rod-shaped support part 38 incorporated in a bottom part 37 of the collar part 36. A recess 36a1 is provided in the end surface 36a of the flange-shaped flange 36 of the pressing center support jig 35, and the spacer 4 and the work receiver 5 are disposed in the recess 36a1. The spacer 4 is used to adjust the position of the workpiece receiver 5 disposed on the spacer 4 (specifically, the interval between the pressing center support jig 35 and the workpiece receiver 5 is adjusted). The spacer 4 and the work receiver 5 are ring-shaped disk members. As shown in FIG. 2, the spacer 4 is disposed on the recess 36 a 1, and the work receiver 5 is disposed on the spacer 4.

  The workpiece receiver 5 used in this example is made of an insulating material so as not to be induction-heated, but may be any material that is not particularly induction-heated. As shown in FIG. 2, the spacer 4 and the work receiver 5 are arranged in the recess 36 a 1 so that the spacer 4 and the work receiver 5 do not protrude from the recess 36 a 1 when the spacer 4 and the work receiver 5 are arranged in the recess 36 a 1. It is formed the same as the width. Then, a restraining member 41 is attached from the outside of the flange portion 36, the restraining member is fixed to the flange portion 36 with a bolt as a fixing member, and the spacer 4 and the work receiver 5 are held in the recessed portion 36a1 of the end surface 36a.

  Further, as shown in FIG. 2, the end portion 38 a of the support portion 38 protrudes into the flange portion 36 from the bottom portion 37 of the flange portion 36, and the pressing center 3 is incorporated into the end portion 38 a of the support portion 38. Yes. The pressing center 3 is a substantially columnar cylindrical member. The attachment of the pressing center 3 to the end portion 38a of the support portion 38 is, as shown in FIG. 2, provided with a male screw portion at the end portion 38a of the support portion 38, and the pressing center 3 has a pressing portion. A center hole 3a is provided along the longitudinal direction of the working center 3, and a female screw portion is provided in the center hole 3a. Then, the end portion 38 a of the support portion 38 and the center hole 3 a of the pressing center 3 are screwed together, and the pressing center 3 is attached to the end portion 38 a of the support portion 38. Further, in order to firmly fix the end portion 38a of the support portion 38 and the pressing center 3, a side hole portion 3b in which a female thread portion communicating with the central hole 3a is formed on the side surface of the pressing center 3 is provided with a bolt. As a result of screwing, the tip of the bolt is in contact with the end 38 a of the support 38.

  As shown in FIG. 2, an outer diameter portion 31 that is thinner than the outer diameter portion 33 of the pressing center 3 and that is capable of inserting the shaft hole 15 of the thin plate member 1 is formed on the end surface 32 side of the pressing center 3. Has been. The outer diameter portion 31 is formed in the pressing center 21 so as to be longer than the thickness of the thin plate member 1. Therefore, the end surface 32 side of the pressing center 3 has a stepped shape as shown in FIG. Then, the pressing center 3 is pressed so that the end surface 32 of the pressing center 3 can approach or leave the end surface 22 of the pressing center 2 facing the end surface 32 of the pressing center 3. The center support jig 35 is incorporated. Further, the pressing center 2 facing the end surface 32 of the pressing center 3 can adjust the load by pressing the thin plate member 1 (adjustment of the load by pressing according to the conditions). It is incorporated in the tool 25. Further, the pressing center 2 operates in accordance with the thin plate member 1 during induction heating (rotates with the rotation of the thin plate member 1).

  The outer diameter portion 21 of the other pressing center 2 (the end surface 22 thereof) is larger than the outer diameter portion 31 of the pressing center 3 (the end surface 32 thereof), and the thin plate member 1 set on the pressing center support jig 35 is provided. The diameter is larger than that of the shaft hole 15. That is, the end surface 22 of the pressing center 2 can press the surface 15 a of the edge of the shaft hole 15. Specifically, by providing a recess 22 a on the end surface 22 of the pressing center 2, the edge 22 b of the end surface 22 of the pressing center 2 comes into contact with the surface 15 a of the edge of the shaft hole 15 of the thin plate member 1 and presses. Can be added.

  On the other side of the pressing center support jig 25, the induction heating coil 6 is provided concentrically with the outer diameter portion 21 of the pressing center 2 and faces the other pressing center 2. The induction heating coil 6 is provided with a recess 6a so that the tooth profile 14 of the thin plate member 1 can be hardened, and the recess 6a of the induction heating coil 6 and the tooth profile 14 are opposed to each other. . As shown in FIG. 1, a core member 7 is incorporated in the induction heating coil 6 so as to face the pressing center 2. The core member 7 faces the induction heating coil 6 and is provided so that the induction heating coil 6 and the pressing center 2 do not directly face each other, and direct transfer of heat from the induction heating coil 6 to the pressing center 2 is performed. It can be prevented. Further, a gap 27 is formed between the core member 7 and the pressing center 2, and cooling water or the like can pass through the gap 27.

  Next, the operation of the thin plate member quenching apparatus 10 having the above-described configuration will be described.

  First, the shaft hole 15 of the thin plate member 1 is arranged in the recess 36 a 1 of the end surface 36 a of the flange 36 of the pressing center support jig 35 so that the shaft hole 15 matches (overlaps) the end surface 32 of the pressing center 3. The outer peripheral portion (rim portion 13) of the thin plate member 1 is placed on the work receiver 5 on the spacer 4.

  Specifically, the back surface side 13 b of the outer peripheral portion (rim portion 13) of the thin plate member 1 is placed on the edge portion 51 of the workpiece receiver 5. As a result, naturally, the surface side 13a of the outer peripheral portion (rim portion 13) of the thin plate member faces the pressing center support jig 25 side. At this time, the outer diameter portion 31 of the pressing center 3 is inserted into the shaft hole 15 of the thin plate member 1 from the rear surface side 12b of the wheel portion 12 of the thin plate member 1, and the thin plate member 1 is based on the shaft hole 15. It is placed concentrically with the pressing center support jig 35.

  Next, the pressing center 2 is disposed on the surface 1 a of the thin plate member 1 in which the outer diameter portion 31 of the pressing center 3 is inserted into the shaft hole 15 of the thin plate member 1. Specifically, the pressing center support jig 35 is moved, the thin plate member 1 placed on the pressing center support jig 35 is moved, and the pressing center support jig 25 is moved closer to the pressing center support jig 25. The edge 22 b of the end surface 22 of the center 2 is brought into contact with the surface 15 a of the edge of the shaft hole 15 on the surface side 12 a of the wheel portion 12 of the thin plate member 1. An induction heating coil 6 is provided on the outer periphery of the pressing center 2, and the edge 22 b of the end surface 22 of the pressing center 2 abuts on the surface 15 a of the edge of the shaft hole 15, whereby the induction heating coil 6. The recessed portion 6 a faces the tooth profile portion 14 formed on the inner periphery of the rim portion 13.

  Then, after the pressing center support jig 35 is moved to the pressing center support jig 25, the pressing center 2 presses the thin plate member 1. Specifically, the edge 22b of the end surface 22 of the pressing center 2 presses and restrains the surface 15a of the edge of the shaft hole 15 of the thin plate member 1 (near the center of the wheel portion 12 of the thin plate member 1). (Pressing from the front surface side 12a to the back surface side 12b of the wheel portion 12 is applied to restrain the thin plate member 1). Further, the outer peripheral portion (rim portion 13) of the thin plate member 1 on the workpiece receiver 5 is pressed against the outer peripheral portion (rim portion 13) of the thin plate member 1 by the workpiece receiver 5, so that the outer peripheral portion ( The rim portion 13) is pressed and restrained (pressing is applied from the back surface side 13b to the front surface side 13a of the rim portion 13 to restrain the thin plate member 1).

  As described above, the edge portion of the shaft hole 15 of the thin plate member 1 and the rim portion 13 that is the outer peripheral portion of the thin plate member 1 are formed by the pressing center 2, the pressing center 3, and the pressing center support jig 35. Pressed and restrained. The pressing center support jig 35, the thin plate member 1 placed on the pressing center support jig 35, and the thin plate member 1 are sandwiched in the quenching apparatus 10 to which the thin plate member 1 is mounted. The pressing center 2 and the pressing center 3 are rotated by means (not shown), and the energized induction heating coil 6 induction-heats the thin plate member 1. Then, after the thin plate member 1 is heated to the quenching temperature, it is rapidly cooled by jetting a coolant by means not shown.

  Specifically, as shown in FIG. 2, since the induction heating coil 6 is energized to perform induction heating, heat from the induction heating is transmitted to the thin plate member 1, but the edge of the shaft hole 15 of the thin plate member 1. The front surface 15a and the rim portion 13 which is the outer peripheral portion are pressed and restrained. Therefore, the thin plate member 1 is in a state where the shape is maintained, and is not easily deformed by induction heating. Further, since the core member 7 is incorporated in the induction heating coil 6 so as to face the pressing center 2, the heat due to the induction heating of the induction heating coil 6 is not directly transmitted to the pressing center 2. As a result, it is possible to protect the pressing center 2 from heat due to induction heating of the induction heating coil 6, prevent cracking, deformation, etc., and extend the life.

  And in this example, as shown in FIG. 2, nitrogen is inject | poured from the outer side (arrow A direction) of the induction heating coil 6, and the clearance gap 27 (arrow B direction) inside the induction heating coil 6, and nitrogen atmosphere is made. After the formation, the thin plate member 1 is heated and cooled by the induction heating coil 6, and the cooling water and nitrogen are discharged from the hole 36b, and the quenching of the thin plate member 1 including the tooth profile portion 14 is completed. In this example, nitrogen is injected to form a nitrogen atmosphere, but the present invention is not particularly limited to injecting nitrogen.

It is explanatory drawing of the thin plate member used with the restraint hardening apparatus of the thin plate member of this invention. (A) is a front view of a thin plate member. (B) is sectional drawing which follows the XX line of (a). It is explanatory drawing which shows the condition which quenches to a thin plate member with the restraint hardening apparatus of the thin plate member which is this invention. It is explanatory drawing which shows hardening of the conventional thin plate member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Thin plate member, 12 ... Wheel part, 13 ... Rim part, 14 ... Tooth profile part, 15 ... Shaft hole 2 ... Center for press, 21 ... Outer diameter part, 22 ... End surface, 22a ... Recessed part, 22b ... Edge part, 25 ... Center support jig for pressing,
DESCRIPTION OF SYMBOLS 3 ... Pressing center, 3a ... Center hole, 3b ... Side hole part, 31 ... Outer diameter part, 32 ... End surface, 33 ... Outer diameter part, 35 ... Pressing center support jig, 36 ... Gutter part, 36a ... End face , 36a1 ... hollow part, 37 ... bottom part, 38 ... support part 4 ... spacer, 41 ... restraining member 5 ... work receiver, 51 ... edge part 6 ... induction heating coil, 6a ... hollow part 7 ... core member 10 ... thin plate member Restraint quenching equipment

Claims (4)

A thin plate member is sandwiched between one pressing center support jig and the other pressing center support jig facing the pressing center support jig, and the thin plate member is guided by an induction heating coil. In constrained quenching equipment for thin plate members to be heat-quenched,
A ring-shaped workpiece receiver disposed on the end face side of the one pressing center support jig to place the outer peripheral portion of the thin plate member;
One of the pressing center support jigs is provided so that it can be inserted into the shaft hole of the thin plate member when the outer peripheral portion of the thin plate member is placed on the ring-shaped workpiece receiver. A pressing center,
The other pressing center provided in the other pressing center support jig, facing one pressing center and contacting the surface of the edge of the shaft hole of the thin plate member;
And a core member provided in the induction heating coil provided concentrically with the outer diameter portion of the other pressing center and provided so as to face the other pressing center. Constrained quenching device for thin plate members. The shaft hole of the thin plate member is overlapped with the end face of one pressing center support jig provided in one pressing center support jig, and the ring-shaped member disposed on the end face side of the one pressing center support jig is arranged. Placing the outer peripheral portion of the thin plate member on a workpiece receiver;
The thin plate member placed on one pressing center support jig is moved to the other pressing center provided on the other pressing center support jig facing the one pressing center support jig. A step of bringing the other end surface of the pressing center into contact with the thin plate member and applying pressure to the thin plate member;
The end face of the other pressing center is brought into contact with the thin plate member, and the thin plate member is subjected to pressing from the work receiver and the end face of the other pressing center to the thin plate member, A step of induction quenching the thin plate member with an induction heating coil provided on the other pressing center side in a state in which the thin plate member is constrained. Method.   When the end surface of the other pressing center contacts the thin plate member, the end surface of the other pressing center contacts the surface of the edge of the shaft hole of the thin plate member. The method for restraining and quenching a thin plate member according to claim 2. The core member is incorporated in the induction heating coil provided on the other pressing center support jig side so as to face the other pressing center. Method for restrained quenching of thin plate members.

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