JP2009076267A - Push rod of induction-heating billet heater, and induction-heating billet heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push rod of induction-heating billet heater, which does not occupy a large storing space in a billet heater for good induction heating when many billets of constant length are subjected to induction heating and forging in order. <P>SOLUTION: The push rod is used for pushing a heating billet out of a heater. It can be split into a plurality of unit rods. The upper stream end of a unit rod A on the tip end side as well as the lower stream end of a unit rod B on a root side, adjoining each other in the unit rod, are provided with a joint which is so configured that as the unit rod B on the root side advances, the slopes of joint brackets formed facing each other in the unit rods A and B slide and move each other to form an open state, and when the unit rod B further advances, the upper stream end of the unit rod A is connected to the lower stream end of the unit rod B on the root side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a push rod of an induction heating billet heater and an induction heating billet heater using the push rod.

  Conventionally, metal parts of automobiles and the like are often manufactured by forging, and the metal material immediately before forging is a metal billet (metal rod-like body, hereinafter referred to as “a metal rod-like body” in an induction heating type billet heater. And is heated to a high temperature necessary for forging such as around 1250 ° C. (see Patent Documents 1-4).

  This heating is generally introduced sequentially into a dielectric heating billet heater in a state where each billet of a fixed length (predetermined length) according to a desired forged product is aligned in series. Done. The length of the billet heater is configured to be long enough for the billet to have a processing length (processing time) sufficient to perform the heat treatment until the surface temperature and the center temperature of the billet are substantially the same. .

  The size of each billet is not particularly limited and may vary depending on the shape of the desired forged product. In general, the short billet is about 50 mm long, and the long billet is not long. Some have a length of about 200 mm, and in some cases, a length of about 500 mm, and more than that.

  These billets are usually placed and conveyed on a conveyor until just before introduction into the billet heater, and pass through a pair of driven pinch roller mechanisms in the vicinity of the outlet of the conveyor to enter the billet heater. In the billet heater, the billet heater is heated by induction heating while being sequentially pushed by a billet that is sent out later and traveling on a rail installed extending in the induction heating coil.

  As described above, generally, in the billet heater, the billet is not positively conveyed, but is pushed by the billet sequentially sent by the pinch roller mechanism, so that the vicinity of the end of the series of processing. After the billet is in the billet heater, the billet cannot be moved because there is no billet sent later, and if left as it is, it will be left in the billet heater.

  Therefore, a push rod is used to discharge the billet in the vicinity of the tail from the billet heater.

  This push rod is a rod-shaped material that is introduced into the billet heater only when it is necessary to push out the billet, but in order to use the heated billet without waste, the above-mentioned direction is the same as the direction in which the heated billet proceeds. It is introduced via a pinch roller mechanism. Therefore, it is necessary to have a length corresponding to the length of the billet heater, but the length of the billet heater may reach up to about 5 m to 6 m. There is an inconvenience that a long space is required for storing and waiting.

  For this reason, a push rod device has been proposed in which the storage space does not become excessive by bending the push rod into a bendable multi-node structure and winding it on a take-up drum (Patent Document). 1).

  However, in this proposal, the diameter of the take-up drum cannot be reduced unless the length of each bent bend is considerably short. On the other hand, if the length of the knot is short, one rigid push is required. There was an inconvenience that the rod could not be formed well.

In addition, an induction heater provided with a suitably long push rod on a conveyor has been proposed so that long and short billets can be heated at any time (Patent Document 2). In particular, it does not relate to the handling of the remaining billet in the vicinity of the tail end of a series of processing, and has a short length and is not related to the technique of the present invention.
Japanese Utility Model Publication No.6-211195 Japanese Patent Publication No. 63-15709 Japanese Patent Laid-Open No. 10-144462 JP-A-11-251045

  In view of the above-described points, the object of the present invention is the vicinity of the tail end in a billet heater that performs induction heating when sequentially performing induction heating and forging on a large number of constant scale (fixed length) billets. The induction heating billet heater push rod that can handle the remaining billet well without taking up a large storage space, and a compact and good holding mechanism / operation mechanism as a storage space for the push rod An object of the present invention is to provide an induction heating billet heater.

The push rod of the induction heating type billet heater of the present invention that achieves the above-described object has the following configuration (1).
(1) A push rod that is introduced into the induction heating type billet heater from the billet introduction port toward the billet discharge port and pushes out the heating billet remaining in the induction heating type billet heater from the heater. The unit rod can be divided into a plurality of unit rods, and the upstream end of the unit rod A on the tip side adjacent to each other and the downstream end of the unit rod B on the root side have a root side By moving the unit rod-shaped body B forward, the inclined surfaces of the fittings formed so as to face the unit rod-shaped bodies A and B are moved in sliding contact with each other to form an open state. When B further advances, the sliding contact is completed and the joint fitting formed facing each of the unit rods A and B is closed, and the upstream end of the unit rod A is closed. Base side of the unit rod member pushrod induction heating method billet heater, characterized in that configured joint is provided so the downstream end is connected to B.

Further, in the push rod of the present invention, a more specific structure is preferable, which has the following configuration (2) or (3).
(2) The cross section structure of the main body portion of the push rod is composed of an I-shaped center plate and arc-shaped outer peripheral plates provided at both ends thereof (1) Push rod of the induction heating billet heater described.
(3) The push rod of the induction heating type billet heater according to (1) or (2), wherein the push rod is made of stainless steel.

Moreover, the induction heating system billet heater of this invention which achieves the objective mentioned above has the structure of the following (4).
(4) A conveyor that feeds the induction heating billet heater push rod according to any one of (1) to (3) above to the induction heating coil in the heater, and an end position of the push rod that is disposed on the conveyor A two-way moving mechanism that includes a position sensor that detects the position of the sensor, a clamp mechanism that is disposed in parallel with the push bar conveyor and holds the push bar, and that moves the clamp mechanism up and down and slides in the horizontal direction. An induction heating billet heater comprising a push rod holding machine having a standby area for holding a push rod that is divided during use.

  According to the push rod of the induction heating type billet heater of the present invention according to claim 1, the billet heater that performs induction heating when sequentially performing induction heating and forging on a number of constant scale (fixed length) billets. It is possible to provide a push rod for an induction heating type billet heater that can be handled well without taking a long storage space.

  According to the push rod of the induction heating type billet heater of the present invention according to claim 2, even if it is introduced into a high temperature heater, it is difficult to be heated and heated in terms of the cross section structure of the push rod, Provided is an excellent induction heating type billet heater push rod that makes it possible to exhibit the function and form of the push rod over a long period of time.

  According to the push rod of the induction heating type billet heater according to the third aspect of the present invention, even if it is introduced into the high-temperature heater, heating and temperature rise are performed in terms of the metal material constituting the push rod. It is difficult to provide a push rod of an excellent induction heating billet heater that makes it possible to exhibit the function and form of the push rod over a long period of time.

  According to the fourth aspect of the present invention, the storage space for the push rod is compact and can realize space saving as a whole, and has an excellent heating mechanism for holding the push rod and an induction heating billet heater. Is provided.

  Hereinafter, the push rod of the induction heating billet heater of the present invention will be described in more detail.

  First, in the present invention, the push rod of the induction heating type billet heater is introduced into the induction heating type billet heater from the billet inlet to the billet discharge port and remains in the induction heating type billet heater. This means a push rod for extruding the heating billet from the heater.

  The specific structure of the push rod of the induction heating type billet heater according to the present invention can be divided into a plurality of unit rod-like bodies, and the unit rod-like bodies A on the tip side adjacent to each other of the unit rod-like bodies. Inclination of the joint fitting formed to face each of the unit rods A and B by advancing the unit rod B on the upstream side and the downstream end of the unit rod B on the root side The surfaces are slid and moved to form an open state, and when the unit bar B further advances, the slidable movement ends and the unit bar A and B are formed facing each other. The joint fitting is closed, and a joint configured to connect the upstream end of the unit bar A and the downstream end of the base unit B is provided.

  The structure will be described with reference to FIGS. 1 to 5. FIG. 1 is a schematic longitudinal sectional view illustrating the above-described unit rod-like body according to the present invention in a model manner. The unit rod-like body 1 is drawn with a chain line and is located at the forefront.

  FIG. 2 is a schematic longitudinal sectional view for explaining the above-described unit bar-like body according to the present invention in a model manner, and is a unit bar-like body connected to the base side of the unit bar-like body 1 located at the foremost position shown in FIG. 2 is illustrated.

  FIG. 3 is a schematic vertical sectional view schematically showing a state in which the unit rod-like bodies 1 and 2 shown in FIGS. 1 and 2 are connected to form one push rod, and in particular, the push rod is guided. The state at the time of making it advance inside a heating system billet heater is shown.

  FIG. 4 is a schematic vertical cross-sectional view schematically showing a state where the unit rod-like bodies 1 and 2 shown in FIGS. 1 and 2 are connected to form one push rod. In particular, the push rod is guided. The state at the time of making it retreat from the inside of a heating system billet heater is shown.

  FIG. 5 is a schematic side view for explaining an example of a joint fitting for connecting the unit rod-like bodies 1 and 2 shown in FIGS. 1 to 4 and the operation thereof.

  FIG. 6 is a schematic cross-sectional view schematically showing the cross-sectional structure of the main body portion of the push rod of the induction heating billet heater according to the present invention.

  As shown in FIGS. 1 and 2, the push rod of the present invention is provided with a joint metal fitting (base side) 4 at the upstream end of the unit rod-like body 1, and the unit rod-like body located upstream thereof. A joint fitting (tip side) 5 is provided at the downstream end of 2. In particular, when the downstream unit rod-like body 1 is a unit rod-like body positioned at the foremost end of the entire push rod, the most advanced metal fitting 3 is provided at the tip thereof. Further, when the next unit rod-shaped body 2 is connected and provided on the upstream side of the unit rod-shaped body 2 shown in FIG. 2, a joint fitting (base side) 4 is provided at the upstream end of the unit rod-shaped body 2. It is a good thing (not shown).

  The fitting (base side) 4 and the fitting (tip side) 5 are provided facing each other as shown in FIGS. 3 and 4, and the unit rod-like body 2 is advanced so that they approach each other. When the unit rod-shaped body 2 further moves forward, the inclined surfaces of the joint fittings formed facing the unit rod-shaped bodies 1 and 2 slidably move to form an open state. After the sliding movement is completed, the joint fitting formed facing each of the unit rod-like bodies 1 and 2 is closed, and the upstream end of the unit rod-like body 1 and the downstream end of the base-side unit rod-like body 2 are connected. What is configured to be used is used.

  FIG. 5 illustrates the operation when the fittings (base side) 4 and the fittings (tip side) 5 are connected. The heads of the fittings on the root side and the tip side are both inclined, The joint fitting on the side has a structure that can move freely around the fulcrum. When connecting from the divided state, it is provided on the inclined surface 7 provided on the joint fitting (base side) 4 of the unit rod-like body 1 and on the joint fitting (tip side) 5 of the unit rod-like body 2. The inclined surface 6 is in sliding contact with the forward movement of the unit rod-like body 2, so that the joint fitting (tip) is centered on a fulcrum 8 provided with respect to the fitting (tip side) 5. 5) is lifted in the direction of arrow A in FIG. 5, and when the unit rod-shaped body 2 is advanced until the sliding contact state of the sliding contact surfaces 6 and 7 is released, the fitting (tip side) 5 is moved by its own weight. The joint bars 4 and 5 are closed in the direction of arrow B in FIG. In FIG. 5, the joint fitting (tip side) 5 is drawn with a solid line when the fittings 4 and 5 are closed, and is drawn with a two-dot chain line. It is a thing at the time of the open state just before becoming a closed state.

  When connecting with the above operation, when all billets have been carried into the billet heater and there is no billet to be carried in anymore using a photoelectric switch (not shown), the billet The unit bar 1 is fed into the heater via a feed pinch roller mechanism, and then the unit bar 2 is fed into the heater via the pinch roller mechanism. It can be connected by engaging with the rear end (upstream end). Then, by further moving forward, the remaining heating billet can be discharged from the heater.

  After the push rod has advanced by a certain length, that is, after the discharge of the remaining billet is completed, the connected push rod is retracted by reversely rotating the pinch roller by a control signal (FIG. 4), When the entire unit rod-like body 2 is retracted and positioned upstream of the pinch roller, the backward movement is temporarily stopped and the unit rod-like body 2 is hung from above the unit rod-like body 2. 18 (FIG. 10) or the like, and by lifting the rod-like body while keeping the horizontal state of the rod-like body, it is possible to release the connection with the unit rod-like body 1 and accommodate only the unit rod-like body 2 it can.

  In the above description, the connection mechanism between the joint fitting (base side) 4 and the joint fitting (tip side) 5 is not limited to the illustrated one, and the fitting that is lifted by sliding contact is formed as a unit bar on the tip side. It may be a fitting at the upstream end of the body 1. Further, the fitting may not be lifted in the vertical direction to form the open state, but the open state is formed in the horizontal direction, and in particular, the closed state is configured by applying an urging force. It may be the one. However, it is important to use a mechanism that forms an open state in a completely horizontal direction so that the connection state can be easily removed. This is because if it is a mechanism that forms an open state in a completely horizontal direction, it is possible to release the connection by lifting it vertically. It is necessary to operate, and the mechanism and equipment structure become complicated, which is not preferable.

  Further, in the push rod of the present invention, although not particularly limited, as shown in FIG. 6, it is preferable that the cross-sectional structure of the push rod body portion is an I-shaped. It is preferable that it is comprised from the center board 9 and the circular-arc-shaped outer peripheral surface 10 provided in the both ends. This shape is considered to be because the area contributing to heat dissipation is large even when the push rod is introduced into the heater, but there is an advantage that the temperature is less likely to be higher than in other forms. Therefore, it is possible to improve the workability of the entire push rod and to increase the life of the push rod.

  Further, the material for forming the push rod is not particularly limited, but it is preferable to use stainless steel that does not easily increase in temperature and is stable against heat from the outside.

  The above-described push rod of the induction heating billet heater according to the present invention is divided into a plurality of unit rod-like bodies and is provided at a position immediately before the induction heating coil of the induction heating billet heater in an unconnected state. It is held and stored by a push rod holding machine, and waits for the arrival of the time required as a push rod.

  The induction heating type billet heater of the present invention uses the above-mentioned push rod of the present invention as a push rod for extruding and discharging the remaining billet, and a plurality of unit rod-like bodies in the divided state are used for the length thereof. A storage space / storage mechanism having a length corresponding to the length of the billet heater (induction heating coil) is provided in front of the billet heater (side of the induction heating coil) and next to the billet travel path. .

  That is, a conveyor for feeding the push rod of the above-described induction heating type billet heater to an induction heating coil in the heater, a position sensor arranged on the conveyor to detect the end position of the push rod, and in parallel with the push rod conveyor A holding mechanism for holding a push bar which is arranged and has a clamp mechanism which holds the push bar, and which has a two-way moving mechanism for moving the clamp mechanism up and down and sliding in the horizontal direction. An induction heating type billet heater characterized by having a push rod holding machine having the following. The structure of the heater will be described with reference to the drawings. FIG. 7 shows the induction heating type billet heater according to the present invention. It is the side schematic diagram which showed the structure of the push rod holding machine in model.

  FIG. 8 is a schematic front view schematically showing the structure of the push rod holder in the induction heating billet heater according to the present invention.

  FIG. 9 is a schematic front view illustrating the operation of the push rod retainer in the induction heating billet heater according to the present invention shown in FIG. 8 as a model.

  FIG. 10 is a schematic side view schematically showing the structure of a push rod hanger that can be used in the present invention.

  In FIG. 7, an arrow C direction indicates a traveling direction of the billet material, and a pinch roller mechanism (not shown) is provided at the tip of the left arrow C in the drawing, and an induction heating coil (not shown) is provided at the tip. The arrow C direction on the left in the figure also shows the direction of travel of the push rod when operating to eliminate the heating billet remaining in the heater.

  In each figure, 11 is a push rod holder, 12 is an air cylinder for raising and lowering the push rod retainer, 13 is a cable rack for push rod hangers, 14 is a photoelectric switch, 15 is a standby push rod receiver, and 16 is transverse to the push rod retainer. Air cylinder, 17 is a hook (clamp mechanism for holding a push rod), 18 is a push rod hanger, 19 is a chuck cylinder for holding a push rod, 20 is a billet conveyor (push rod conveyor), and 21 is a support rod support column ( In the figure, the direction indicated by the arrows DD and EE indicates the direction in which the push rod hanger 18 (hook 17) that clamps the push rod is moved up and down and slides in the horizontal direction. Is.

  Further, the location where the H-H line intersects indicates the heating line position of the induction heating type billet heater as viewed from the front direction of the push rod holding machine, and the push rod 1 at the position as viewed from the front direction is shown in FIG. 8 and 1 in FIG. By the way, this position is also a position through which the supply billet passes, and is also a position through which the unit rod-like body 2 and the rod-like bodies following it pass.

  The push rod retainer in the induction heating type billet heater according to the present invention uses a photoelectric switch (not shown) or the like in a state where all billets have been carried into the billet heater and no billets are carried in anymore. When detected, the unit rod-like body 1 that is suspended and held by the hook 17 of the push rod hanger 18 at the position of the solid line in FIGS. 8 and 9 is lowered and placed on the billet conveyor (push rod conveyor) 20. The unit rod 1 is placed. Then, the hook 17 is opened and closed by using the push rod gripping chuck cylinder 19 of FIG. 10 to release the holding, and further, the conveyor 20 is operated, so that the unit rod-shaped body 1 is put on the conveyor 20 and advanced. It is introduced into the heater via a delivery pinch roller mechanism.

  The holding machine is provided with a plurality of photoelectric switches 14 at the most upstream end position and the intermediate position in order to detect the presence / absence of the push rod, the position of the end portion, etc., and corresponds to each position of the push rod. It is controlled so as to perform a desired operation. After it is detected that the unit bar 1 has been introduced into the heater by the pinch roller, the push bar hanger 18 is raised, moved sideways, further lowered, and waited on the standby push bar receiver 15. The unit rod-shaped body 2 is gripped, further moved up and down and slid in the horizontal direction, and the unit rod-shaped body 2 is put on the conveyor 20 and advanced to be connected to the preceding unit rod-shaped body 1. Then, the billet is introduced into the heater through a pinch roller mechanism for sending out the billet, and the remaining billet is pushed out.

  FIG. 11 is a schematic model perspective view schematically showing an arrangement example of push rods in the holding machine, in which 22 is a preceding unit bar-like body, and 23 is a subsequent unit bar-like body. Further, the unit bar-like body following the unit bar-like body 23 is preferably placed on a table at a horizontal position next to the unit bar-like body 23. Although not particularly limited, the total number of unit rods is preferably about 5 to 10 at maximum in a normal case. In FIG. 11, the arrow C indicates the direction of travel when the billet is pushed with a push bar, as shown in FIG. 7.

  After the advancement of the push rod for a predetermined distance has been completed and the remaining billet has been pushed out, the push rod is reversely moved in the connected state by reversing the pinch roller so that the upstream end position is predetermined. When the push rod hanger 18 that has been waiting in an empty state is lowered and the hook 17 is opened and closed using the chuck cylinder 19 for holding the push rod, The unit rod-shaped body 2 is moved back and forth and moved horizontally in the horizontal direction to return the unit rod-shaped body 2 onto the standby push rod receiver 15, and further, the unit rod-shaped body 1 is held and moved up and down and horizontally moved in a predetermined position. I will make you wait.

  About the above operation | movement, it is an example of an embodiment, The other aspect can also be employ | adopted by the combination of raising / lowering of a push rod hanger and the sliding movement in a horizontal direction, or in relation to installation space.

  Although the control circuit is not shown, a control system for controlling a switch for detecting the billet supply state and the position of the push rod and an air cylinder for controlling the operation of the hanger can be easily constructed.

FIG. 1 is a schematic longitudinal sectional view for explaining the above-described unit rod-like body according to the present invention in a model manner, assuming a unit rod-like body 1 positioned at the forefront by drawing a tip metal fitting 3 at a tip portion with a two-dot chain line. This is shown in the figure. FIG. 2 is a schematic longitudinal sectional view for explaining the above-described unit bar-like body according to the present invention in a model manner, and is a unit bar-like body connected to the base side of the unit bar-like body 1 located at the foremost position shown in FIG. 2 is illustrated. FIG. 3 is a schematic longitudinal sectional view schematically showing a state in which the unit rod-like bodies 1 and 2 shown in FIGS. 1 and 2 are connected to form one push rod, and in particular, the push rod is induction-heated. The state when it is made to advance inside a system billet heater is shown. FIG. 4 is a schematic longitudinal sectional view schematically showing a state in which the unit rod-like bodies 1 and 2 shown in FIGS. 1 and 2 are connected to form one push rod, and in particular, the push rod is induction-heated. The state when it is made to retreat from the inside of a system billet heater is shown. FIG. 5 is a schematic side view for explaining an example of a joint fitting for connecting the unit rod-like bodies 1 and 2 shown in FIGS. 1 to 4 and the operation thereof. FIG. 6 is a schematic cross-sectional view schematically showing the cross-sectional structure of the main body portion of the push rod of the induction heating billet heater according to the present invention. FIG. 7 is a schematic side view schematically showing the structure of the push rod holder in the induction heating billet heater according to the present invention. FIG. 8 is a schematic front view schematically showing the structure of the push rod holder in the induction heating billet heater according to the present invention. FIG. 9 is a schematic front view illustrating the operation of the push rod retainer in the induction heating billet heater according to the present invention shown in FIG. 8 as a model. FIG. 10 is a schematic side view schematically showing the structure of a push rod hanger that can be used in the present invention. FIG. 11 is a schematic model perspective view schematically showing an example of the arrangement of push rods in the holding machine.

Explanation of symbols

1: Unit rod-like body located at the most distal end 2: Unit rod-like body located at the base side of the unit rod-like body 1: 3: Cutting edge metal fitting 4: Joint fitting (root side)
5: Fitting (tip side)
6: Sliding contact surface of joint fitting (tip side) 7: Sliding contact surface of joint fitting (base side) 8: Support point of joint 9: I-shaped center plate 10 in cross section of push rod 10: Crossing of push rod Arc-shaped outer peripheral plate 11: Push rod retainer 12: Push rod retainer lifting air cylinder 13: Push rod hanger conveyor 14: Photoelectric switch 15: Standby push rod receiver 16: Push rod retainer transverse air cylinder 17 : Hook (clamp mechanism that holds the push rod)
18: Push rod hanger 19: Push rod gripping chuck cylinder 20: Billet conveyor (push rod conveyor)
21: Push rod holder prop (frame)
22: Leading unit rod 23: Subsequent unit rod

Claims (4)

  A push rod that is introduced into the billet heater from the billet inlet to the billet discharge port, and is used to push out the heated billet remaining in the billet heater from the heater. Can be divided into unit rod-like bodies, and the upstream end of the unit rod-like body A on the front end side adjacent to each other and the downstream end of the unit-rod-like body B on the root side have a unit rod-like shape on the root side. By moving the body B forward, the inclined surfaces of the fittings formed to face each of the unit bar bodies A and B are moved in sliding contact with each other to form an open state. When the forward movement is completed, the sliding movement is finished, and the fittings formed facing each of the unit rods A and B are closed, and the upstream end and the root of the unit rod A are closed. Push rod of induction heating type billet heater configured joint as the downstream end is connected to the unit rod-like body B of which is characterized in that is provided.   2. The induction heating according to claim 1, wherein the cross-sectional structure of the main body portion of the push rod is composed of an I-shaped center plate and arc-shaped outer peripheral plates provided at both ends thereof. A billet heater push rod.   The push rod for an induction heating type billet heater according to claim 1 or 2, wherein the push rod is made of stainless steel.   A conveyor for feeding the push rod of the induction heating type billet heater according to any one of claims 1 to 3 to an induction heating coil in the heater, a position sensor arranged on the conveyor and detecting an end position of the push rod, A clamp mechanism that is arranged in parallel with the push bar conveyor and holds the push bar, and is divided into a two-way moving mechanism that moves the clamp mechanism up and down and slides in the horizontal direction when not in use. An induction heating type billet heater comprising a push rod holding machine having a standby area for holding a push rod.