JP2007239059A - Induction heat treatment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heat treatment device which is compact in the entire configuration, and capable of continuously performing the induction heat treatment, preventing the effect of spray water and high heat generated during the induction hardening and the induction tempering on other mechanism units as much as possible, and enhancing the safety, the durability, the maintainability or the like of the device. <P>SOLUTION: The induction heat treatment device comprises a workpiece holding/step conveying/hold-releasing mechanism unit 1, a conveying beam 5 having a pair of workpiece holding members 16, 16 for holding a workpiece W, an opening/closing mechanism unit 7 for holding and releasing the workpiece W by the pair of workpiece holding members 16, 16 of the conveying beam 5, a pair of guide parts 6, 6 arranged before and behind a workpiece heat treatment unit 3 with a predetermined space therebetween for guiding the conveying beam 5 in the moving direction of the workpiece W, and a step moving mechanism unit 4 for step-moving the conveying beam 5. A workpiece heat treatment unit 2 arranged between the pair of guide parts 16, 16 is covered by a spray preventive cover 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an induction heat treatment apparatus that can compactly integrate a work to be induction hardened and induction tempered in a series of flows from loading to unloading, and in particular, a place for induction hardening and induction tempering of a work. The high frequency is designed to improve the safety and life of the equipment by reducing the influence of sprinkling water and high heat during induction hardening and induction tempering, by separating the machine and the mechanism that transports the workpiece. The present invention relates to a heat treatment apparatus.

  For example, members such as outer races used for bearings require relatively high-volume production. In order to efficiently perform induction hardening and induction tempering, workpieces (outer races to be processed) are brought in and heat-treated. , A device is adopted in which a series of unloading flows are performed in a single device. Various devices have been proposed as this type of device. FIG. 8 shows an example of this, and a moving mechanism unit including a clamping unit 40 for clamping a workpiece, a conveyance table 41 for holding the clamping unit 40, and a cylinder for moving the conveyance table 41 in steps. 42 and a cover 43 that encapsulates (covers) the whole.

  Although the apparatus of the prior art shown in FIG. 8 is gathered compactly, since all the mechanism parts are accommodated in the single cover 43, all the sprinkling of the cooling water used at the time of quenching and tempering is carried out. This may affect the mechanical parts and damage the mechanical parts. Further, there is a problem that high heat generated during induction hardening and induction tempering acts on the above-mentioned mechanism part, adversely affects them and decreases performance and life. In addition, these mechanical units are inconvenient to maintain, and there is a problem that the reliability and safety of the apparatus are not sufficiently maintained.

  The present invention has been made in view of the above-described problems. The object of the present invention is that the entire apparatus can be compactly integrated and can be continuously subjected to induction heat treatment, and also occurs during induction hardening and induction tempering. An object of the present invention is to provide a high-frequency heat treatment apparatus capable of preventing the influence of water spray or high heat on other mechanical parts of the apparatus as much as possible and improving the safety, durability, maintainability, etc. of the apparatus.

In order to achieve the above-described object, in the present invention, in a high-frequency heat treatment apparatus that carries in a workpiece, which is an object to be processed, performs induction hardening and induction tempering, and then continuously performs a series of operations to be carried out. ,
(A) a workpiece clamping / step moving / clamping release mechanism unit that repeatedly performs an operation of clamping and moving the carried workpiece to the next step, releasing the clamping and returning to the original position;
(B) a workpiece carry-in mechanism unit disposed on the front side of the workpiece clamping / stepping / clamping release mechanism unit;
(C) a workpiece unloading mechanism portion disposed on the rear side of the workpiece clamping / step movement / nip release mechanism portion;
(D) a workpiece heat treatment section for performing induction hardening and tempering of the workpiece;
Each with
The workpiece clamping / step conveyance / clamping release mechanism is configured to perform clamping and release of the workpiece by a conveyance beam including a pair of workpiece clamping members for clamping the workpiece and the pair of workpiece clamping members of the conveyance beam. An opening / closing mechanism section for guiding the transport beam in the moving direction of the workpiece, a pair of guide sections disposed on both sides of the workpiece heat treatment section at a predetermined distance from each other, and stepping the transport beam It is composed of a step moving mechanism that moves,
The work heat treatment part disposed between the pair of guide parts is encapsulated by a water spray prevention cover.
In the present invention, the opening / closing mechanism part and the step moving mechanism part of the carrier beam are arranged at positions outside the water spray prevention cover and blocked by the water spray prevention cover.
In the present invention, the clamping interval between the pair of workpiece clamping members can be changed based on a numerical command input to a servomotor that is a drive source of the opening / closing mechanism.

  According to the first aspect of the present invention, the workpiece clamping / step transporting / clamping release mechanism portion includes a conveying beam including a pair of workpiece clamping members for clamping the workpiece, and a workpiece by the pair of workpiece clamping members of the conveying beam. An opening / closing mechanism for clamping and releasing, a pair of guides disposed on both the front and rear sides of the workpiece heat treatment unit at a predetermined interval to guide the carrier beam in the moving direction of the workpiece, and the carrier beam Since the work heat treatment part arranged between the pair of guide parts is encapsulated by a water spray prevention cover, the entire apparatus is compactly gathered continuously. In addition to being subjected to induction heat treatment, the influence of watering and high heat generated during induction hardening and induction tempering on other mechanical parts of the device It is possible to prevent as much as possible, it is possible to achieve security of the device, durability, and improve various maintenance. That is, the loaded work is sandwiched by the transport beam of the work clamping / stepping / clamping release mechanism and sent to the next step, and is carried out after performing predetermined induction hardening and induction tempering. In the high-frequency heat treatment apparatus, the opening / closing mechanism unit and the step moving mechanism unit for operating the carrier beam are separated from the part (work heat treatment part) for quenching and tempering, and are shielded from the work heat treatment part by the water spray prevention cover. Therefore, the opening / closing mechanism and the step moving mechanism are not affected by water spray or high heat. As a result, safety and durability can be improved, maintenance and repair can be easily performed, and maintenance can be improved.

  According to the second aspect of the present invention, the opening / closing mechanism portion and the step moving mechanism portion of the carrier beam are arranged at positions outside the water spray prevention cover and blocked by the water spray prevention cover. Therefore, since the cooling water and high heat in the work heat treatment part are blocked by the sprinkling prevention cover, it prevents the sprinkling and high heat from being transmitted to the opening / closing mechanism part and step moving mechanism part of the carrier beam to cause rusting and deterioration. can do.

  According to a third aspect of the present invention, the clamping interval between the pair of workpiece clamping members can be changed based on a numerical command input to a servo motor that is a drive source of the opening / closing mechanism. Therefore, the width interval between the pair of workpiece clamping members can be arbitrarily changed based on the numerical command of the servo motor to set the clamping interval to a desired interval. It is possible to hold a workpiece of the size.

  Hereinafter, an induction heat treatment apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows an overall configuration of a high-frequency heat treatment apparatus 100 according to an embodiment of the present invention. The apparatus 100 is a series of flows from loading to unloading with an outer race as a work (object to be processed) W. The induction hardening and the induction tempering are continuously performed. As shown in FIG. 1, the induction heat treatment apparatus 1 includes a workpiece clamping / step movement / clamping release mechanism unit 1, a workpiece heat treatment unit 2 for induction hardening and tempering of the workpiece W, and workpiece clamping / step movement / clamping. A workpiece loading mechanism portion 3 disposed on the front side of the release mechanism portion 1 and a workpiece unloading mechanism portion 4 disposed on the rear side of the workpiece clamping / stepping / sandwich releasing mechanism portion 1 are provided. As will be described in detail later, the workpiece clamping / stepping / clamping release mechanism unit 1 includes a carrier beam 5, a pair of guide units 6, 6, a pair of opening / closing mechanism units 7, 7, and a step movement mechanism unit 8. (See FIG. 7). Moreover, the workpiece | work heat processing part 2 is comprised from the quenching mechanism part 9, the cooling part 10, and the tempering mechanism part 11, and these are enclosed by the sprinkling prevention cover 12 as shown in FIG.1 and FIG.2. Yes.

  As shown in FIGS. 3A and 3B, a workpiece (in this example, an outer race) W that is an object to be processed is a pair of sandwiching pieces 14 provided on a carrier beam 5 described later. The base end side is sandwiched by 14 and transferred to the next step. At that step, the workpiece clamping by the clamping pieces 14 and 14 is released and only the workpiece W is left in the step, while the workpiece clamping / step moving / nipping release mechanism unit 1 is entirely returned to the original position. It is configured as follows.

  Next, the structure of the workpiece clamping / step moving / clamping release mechanism 1 will be described with reference to FIGS. 1, 4, 5, 6, and 7. FIG. The workpiece clamping / step moving / clamping release mechanism section 1 has a structure as shown in FIG. 4 as a whole structure, and a pair of workpiece clamping members 16 and 16 mounted on the base plate 15 and these workpieces. A carrier beam 5 having two pairs of support columns 17, 17 and 17, 17 erected at the front and rear portions of the clamping members 16, 16, and guidance for reciprocating the carrier beam 5 along the moving direction of the workpiece W The pair of guide portions 6 and 6 fixed to the apparatus main body side and arranged at positions spaced apart from each other, the pair of workpiece clamping members 16 and 16, and the pair of support columns 17 and 17 are opened (interval). A pair of opening / closing mechanism portions 7 and 7 (for adjusting the width) and a step moving mechanism portion 8 (see FIG. 7) for reciprocating the carrier beam 5 along the moving direction of the workpiece W are provided. The workpiece clamping members 16 and 16 are formed of a pair of elongated plates arranged on the base plate 15 in parallel with each other with a length substantially equal to the length of the base plate 15, and the workpiece clamping members 16 and 16. A pair of struts 17 and 17 are erected in the vicinity of the front and rear ends. A pair of clamping pieces 14 and 14 are fixed on the workpiece clamping members 16 and 16 at a plurality of locations at intervals corresponding to the step pitch.

  Moreover, the above-mentioned guide parts 6 and 6 have the board | plate material 6a extended along the moving direction of the workpiece | work W, as shown in FIG.1, FIG.2, FIG.4, FIG. And fixedly arranged on the apparatus main body. A pair of guide portions 18, 18 are provided at the upper and lower portions of the plate member 6a, and two pairs of guide members 19 fixed to the body portion 7a of the opening / closing mechanism portion 7 slide on these guide portions 18, 18. It is movably engaged. Thus, an assembly composed of the base plate 15, the workpiece clamping member 16, and the column 17 to which the main body portion 7 a is attached is guided by the guide portion 18 and the guide member 19 in the workpiece moving direction. It is comprised so that it can move along.

  On the other hand, as shown in FIGS. 4 and 5, the opening / closing mechanism portion 7 has a main body portion 7 a having an L-shaped cross section that is fixed above the support column 17. Guide rails 20 and 20 are provided. And a pair of guide parts 25 and 25 provided in the support | pillar 17 are slidably engaged with the guide rails 20 and 20, Thereby, the support | pillars 17 and 17 which mutually oppose are along the guide rails 20 and 20 (guide). The portion 6 is configured to be able to slide and move in a direction perpendicular to the plate material 6a.

  As shown in FIG. 6, a pair of upper and lower rack bars 21, 21 are arranged in parallel with each other along the opening / closing direction of the support column 17 in the main body of the opening / closing mechanism 7. And the blocks 22 and 22 are attached to the front-end | tip of the rack rods 21 and 21, and these blocks 22 and 22 are each fixed to the support | pillars 17 and 17 which oppose each other. Further, the rack bars 21 and 21 are arranged so as to extend in a direction away from the support column 17, and are engaged with one gear 24 at the end portion on the extension side. One rack bar 21 is sandwiched between the roller 23 a and the gear 24, and the other rack bar 21 is sandwiched between the roller 23 b and the gear 24. The gear 24 is connected to a servo motor 26 shown in FIG. Thus, as the servo motor 26 is operated, the rack bars 21 and 21 are moved in opposite directions to each other, and the columns 17 and 17 are moved through the blocks 22 and 22 in a direction approaching or separating from each other. As shown in FIGS. 3A and 3B, an opening / closing operation is performed, whereby the workpiece W is clamped or released by the clamping pieces 14 and 14. In the present embodiment, the clamping interval (clamping width) for clamping the workpiece W can be arbitrarily changed based on a numerical command input to the servo motor 26 that is a drive source of the opening / closing mechanism 7. Thus, the width dimension between the holding pieces 14 and 14 can be automatically adjusted according to the dimension of the workpiece W.

  Next, the step moving mechanism unit 8 will be described mainly with reference to FIG. Although not clearly shown in the drawing, a nut-like block 27 (conceptually shown in FIG. 7) is fixed to the body portion 7 a of the opening / closing mechanism 7, and a feed screw shaft 28 screwed into the nut-like block 27 is provided. It is arranged on the fixed side of the apparatus main body along the moving direction of the workpiece W. A pulley 29 is connected to the end of the feed screw shaft 28, and the pulley 29 is connected to a pulley 32 that is fixed to a servo motor 31 with a belt 30 interposed therebetween. Further, one end of a cable bear (registered trademark) 33 is connected to the nut-shaped block 27, and the other end is connected to the fixed side of the apparatus. Thus, the feed screw shaft 28 rotates in response to the servo motor 31 being operated, and the transport beam 5 moves along the guide portion 6 in the workpiece moving direction via the nut-like block 27 and the main body portion 7a of the opening / closing mechanism 7. It is designed to be moved step by step.

  On the other hand, the workpiece heat treatment section 2 is disposed between the front and rear guide sections 6 and 6 as described above, and a quenching mechanism section 9 that performs induction hardening of the workpiece, and a tempering mechanism section 11 that performs tempering of the cooling section 10 and the workpiece W. Etc. These have a complicated structure as shown in the figure, but the structure of the apparatus is not directly related to the present invention, and the description thereof will be omitted. As described above, these are encapsulated by the water spray prevention cover 12. The water spray prevention cover 12 has a structure that does not interfere with the base plate 15 and the workpiece clamping member 16 of the transport beam 5.

  As shown in FIG. 1, the workpiece carry-in mechanism unit 3 and the workpiece carry-out mechanism unit 4 are formed in a conveyor shape, and carry the workpiece W (outer race 13) into and out of the workpiece clamping / stepping / clamping release mechanism unit 1. However, since the structure thereof is known, the detailed structure is not described.

  Here, the operation of the high-frequency heat treatment apparatus 100 of the present embodiment will be described as follows. First, the workpiece W is mounted on the conveyor 3a (see FIG. 2) of the workpiece carry-in mechanism unit 3 and is conveyed to the workpiece clamping / stepping / work clamping / release mechanism unit 1 side, and the workpiece clamping members 16 and 16 of the conveying beam 5 are conveyed. Are mounted at a predetermined position between the holding pieces 14 and 14. Along with this, the opening / closing mechanism 7 is operated, and the workpiece W is clamped between the clamping pieces 14 and 14. Next, the step moving mechanism unit 8 is actuated, and the workpiece W is sent to the next step (next process) while being held, and processing in that step is performed. On the other hand, the carrier beam 5 that has proceeded to the next step is released from the clamping state of the workpiece W by the clamping pieces 14 and 14 in accordance with the operation of the opening / closing mechanism unit 7, and the workpiece W is released. 8 starts moving in the opposite direction (original position) and returns to the original position. Thereafter, by repeatedly performing the same operation, the workpiece W is sequentially sent to the next step, and predetermined heat treatment (specifically, quenching, cooling, and tempering) is sequentially performed, and the workpiece unloading mechanism is performed. Unloaded from unit 4 By such a series of operations, the continuous heat treatment of the workpiece W is effectively performed.

  During the operation of the high-frequency heat treatment apparatus 100, cooling water is supplied to the workpiece heat treatment unit 2, but the cooling water is prevented from scattering to the outside by the water spray prevention cover 12. Therefore, the cooling water is not scattered on the workpiece clamping / stepping / clamping release mechanism 1 side, and therefore is hardly affected by the cooling water. The workpiece clamping / step moving / clamping release mechanism unit 1 includes the guide unit 6 and the servo motors 26 and 31 as described above. However, since these components are not adversely affected by the cooling water, rusting and deterioration are caused. Is prevented, and durability and safety can be improved. Moreover, since the guide part 6 and the servomotors 26 and 31 are located at a position where they are removed from the water spray prevention cover 12, and further at a position where maintenance work can be facilitated, it is possible to improve maintainability. In addition, since it is compact as a whole, it is possible to save space.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention. For example, in the above-described embodiment, the outer race 13 is employed as the work W to be induction hardened and induction tempered, but other various works (objects to be processed) may be employed. In addition, as a workpiece | work, the thing of the shape which can be clamped is desirable. Further, for example, the tempering mechanism unit 11 may be disposed outside the water spray prevention cover 12 as necessary. Moreover, the structure of each mechanism part of the high frequency heat processing apparatus 100 is not limited to the structure of embodiment mentioned above, It can change suitably.

It is a front view which shows the whole structure of the high frequency heat processing apparatus which concerns on one Embodiment of this invention. It is a schematic diagram which shows roughly the structure of the principal part of the high frequency heat processing apparatus of FIG. FIG. 3 (a) is a plan view and FIG. 3 (b) is a front view showing a state in which a workpiece to be quenched and induction tempered by the induction heat treatment apparatus of the present invention is shown. It is a perspective view which shows the principal part of the workpiece | work clamping / step movement / clamping release mechanism part in the high frequency heat processing apparatus of FIG. It is a front view which shows a part of guide part and carrier beam in the high frequency heat processing apparatus of FIG. It is a side view which shows the opening-closing mechanism part in the high frequency heat processing apparatus of FIG. It is a front view which shows the step movement mechanism part in the high frequency heat processing apparatus of FIG. It is a top view which shows the conventional high frequency heat processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work clamping / step movement / clamping release mechanism part 2 Work heat treatment part 3 Work carry-in mechanism part 4 Work carry-out mechanism part 5 Conveying beam 6 Guide part 7 Opening / closing mechanism part 8 Step moving mechanism part 9 Quenching mechanism part 10 Auxiliary cooling part 11 Tempering mechanism 12 Sprinkling prevention cover 13 Work 13 Outer race 14 Holding piece 15 Base plate 16 Work holding member 17 Support 18 Guide part 19 Opening / closing mechanism body 20 Guide part 21 Rack bar 26 Servo motor 27 Nut-shaped block 28 Feed screw shaft 31 Servo motor 100 Induction heat treatment equipment W Workpiece

Claims (3)

In the induction heat treatment apparatus that carries in the workpiece that is the object to be processed, performs induction hardening and induction tempering, and then continuously performs a series of operations to carry out,
(A) a workpiece clamping / step moving / clamping release mechanism unit that repeatedly performs an operation of clamping and moving the carried workpiece to the next step, releasing the clamping and returning to the original position;
(B) a workpiece carry-in mechanism unit disposed on the front side of the workpiece clamping / stepping / clamping release mechanism unit;
(C) a workpiece unloading mechanism portion disposed on the rear side of the workpiece clamping / step movement / nip release mechanism portion;
(D) a workpiece heat treatment section for performing induction hardening and tempering of the workpiece;
Each with
The workpiece clamping / step conveyance / clamping release mechanism is configured to perform clamping and release of the workpiece by a conveyance beam including a pair of workpiece clamping members for clamping the workpiece and the pair of workpiece clamping members of the conveyance beam. An opening / closing mechanism section for guiding the transport beam in the moving direction of the workpiece, a pair of guide sections disposed on both sides of the workpiece heat treatment section at a predetermined distance from each other, and stepping the transport beam It is composed of a step moving mechanism that moves,
Encapsulating the work heat treatment part disposed between the pair of guide parts with a water spray prevention cover,
A high-frequency heat treatment apparatus characterized by   2. The high-frequency heat treatment according to claim 1, wherein the opening / closing mechanism portion and the step moving mechanism portion of the carrier beam are arranged at positions outside the water spray prevention cover and blocked by the water spray prevention cover. apparatus.   The configuration according to claim 1 or 2, wherein the clamping interval between the pair of workpiece clamping members can be changed based on a numerical command input to a servo motor that is a drive source of the opening / closing mechanism. Induction heat treatment equipment.

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