CN111527037B

CN111527037B - Tape winding device

Info

Publication number: CN111527037B
Application number: CN201780098006.9A
Authority: CN
Inventors: 西井强
Original assignee: Sumitomo Electric Sintered Alloy Ltd
Current assignee: Sumitomo Electric Sintered Alloy Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2021-12-07
Anticipated expiration: 2037-12-26
Also published as: JPWO2019130414A1; JP6908249B2; WO2019130414A1; KR102380425B1; KR20200096902A; CN111527037A

Abstract

The belt winding device is used for winding a mesh belt in a mesh belt type continuous sintering furnace in which a workpiece placed on the mesh belt is sintered. The tape winding device includes: a hollow winding roller that winds the mesh belt around the outer periphery; a drive mechanism provided at one axial end of the winding roller and configured to rotate the winding roller; and a support mechanism provided on the other axial end side of the winding roller and supporting the winding roller to be rotatable. The winding roller is detachably connected to the drive mechanism and the support mechanism.

Description

Tape winding device

Technical Field

The present invention relates to a tape winding device.

Background

Sintered bodies obtained by sintering molded bodies obtained by pressure molding metal powder such as iron powder are used for automobile parts, general machine parts, and the like. The sintered body can be produced using a mesh belt type continuous sintering furnace using a mesh belt.

FIG. 10 shows a conventional mesh-belt type continuous sintering furnace (hereinafter, also simply referred to as "sintering furnace")

100, respectively. The sintering furnace 100 includes: a furnace body 101 formed of a flame-proof furnace made of metal and having a dome-shaped cross section; and an endless mesh belt 102 which travels inside the furnace main body portion 101. A workpiece W to be heated is placed on the mesh belt 102. The furnace body 101 has a degassing zone 103, a sintering zone 104, and a cooling zone 105 in this order from the inlet side (left side in fig. 10) toward the outlet side. The mesh belt 102 is stretched over a drive pulley 106 provided on the inlet side of the furnace main body 101 and a driven pulley 107 provided on the outlet side. The mesh belt 102 travels in the furnace main body 101 in a state where a tensile stress is applied by driving a drive pulley 106 by a motor not shown. In the sintering zone 104, the mesh belt 102 heated to a high temperature of, for example, about 1100 to 1200 ℃ is cooled to a temperature of about 100 ℃ when being discharged from the cooling zone 105. In fig. 10, reference numeral 108 denotes conveying rollers disposed on the ground to reduce resistance when the mesh belt 102 travels, and reference numeral 109 denotes a pit for storing the extended mesh belt 102.

The mesh belt 102 is made of stainless steel having high heat resistance, such as SUS310 or SUS316, and is used in an environment where tensile stress is applied and temperature change is large as described above, and therefore, a large elongation is generated in a relatively short period of time due to high-temperature creep. For example, in the case of a mesh belt having a total length of about 50m, an elongation of about 1m may be generated between 2 cycles. Therefore, the sintering furnace 100 periodically checks the elongation of the mesh belt 102, and performs maintenance such as cutting and joining the mesh belt 102 every time a predetermined elongation is generated.

Disclosure of Invention

However, if the elongation of the mesh belt 102 reaches the limit, the entire mesh belt needs to be replaced with a new one. Conventionally, replacement of the mesh belt 102 has been performed manually, and an operation of cutting the used mesh belt 102 at one location and repeatedly pulling out the mesh belt by several meters is performed. The mesh belt 102 is made of metal, and is about 20kg/m and extremely heavy in the case of a mesh belt 102 having a width of 100cm, for example, and the replacement work of the mesh belt 102 is heavy labor and involves dangerous work. Further, the pulling-out operation and the cutting-off operation need to be repeated every several meters, and a long time is required until the operation is completed.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a tape winding device capable of safely and easily performing a replacement operation of a mesh tape in a short time.

A belt winding device according to one aspect of the present invention winds a mesh belt in a mesh belt type continuous sintering furnace in which a workpiece placed on the mesh belt is sintered,

the belt winding device comprises:

a hollow winding roller that winds the mesh belt around the outer periphery;

a drive mechanism provided at one axial end of the winding roller and configured to rotate the winding roller; and

a support mechanism provided on the other axial end side of the winding roller and supporting the winding roller in a freely rotatable manner,

the winding roller is detachably connected to the drive mechanism and the support mechanism.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the invention, the replacement work of the mesh belt can be safely and easily performed in a short time.

Drawings

Fig. 1 is an explanatory view of an example of a mesh-belt type continuous sintering furnace having a mesh belt wound by a belt winding device of the present invention.

Fig. 2 is an oblique view illustrating an embodiment of a tape winding apparatus according to the present invention.

Fig. 3 is an oblique view illustrating the winding roller.

Fig. 4 is a cross-sectional explanatory view of the winding roll shown in fig. 3.

Fig. 5 is an explanatory view of the back side of the tape winding device shown in fig. 2.

Fig. 6 is a partial explanatory view of the drive mechanism.

Fig. 7 is a front explanatory view of the rotating body.

Fig. 8 is an oblique view illustrating the support mechanism.

Fig. 9A is an explanatory view of the winding operation.

Fig. 9B is an explanatory diagram of the winding operation.

Fig. 9C is an explanatory view of the winding operation.

Fig. 10 is an explanatory view of an example of a conventional mesh-belt continuous sintering furnace.

Detailed Description

[ description of embodiments of the invention ]

First, embodiments of the present invention will be described.

In a tape winding device according to an aspect of the present invention,

(1) which is used for winding a mesh belt in a mesh belt type continuous sintering furnace, sintering a workpiece placed on the mesh belt in the mesh belt type continuous sintering furnace,

the belt winding device comprises:

a hollow winding roller that winds the mesh belt around the outer periphery;

In the webbing winding device according to this aspect, the used webbing can be wound around the outer periphery of a hollow winding roller that is driven by a drive mechanism provided at one end side in the axial direction of the winding roller. Further, the winding roller is detachably connected to the driving mechanism and the support mechanism provided on the other end side in the axial direction of the winding roller, and therefore the winding roller can be detached from the driving mechanism and the support mechanism after the winding is completed. Therefore, the webbing can be wound up only by rotating the winding roller by the drive mechanism without depending on manpower, and replacement of the webbing can be performed safely and easily. In addition, since mechanical force is used, the replacement work can be completed in a short time.

(2) In the tape winding device according to the above (1), it is preferable that an opening is formed in an outer peripheral surface of the winding roller, and a hook portion capable of locking the wire attached to the end portion of the mesh tape is provided at an edge of the opening. In this case, the end of the mesh belt can be connected to the winding roller by engaging the wire attached to the end of the mesh belt with the hook.

(3) In the tape winding device according to the above (1) or (2), it is preferable that a wall is provided on an inner peripheral surface of the winding roller, and a tip of the rod inserted from an opening at one end of the winding roller can abut against the wall. In this case, the wall body is pushed in the axial direction by a rod inserted from an opening at one end of the winding roller detached from the belt winding device after completion of winding of the mesh belt, and the winding roller can be pulled out from the wound mesh belt. Further, when the end portion of the mesh belt is temporarily fixed to the winding roller at the start of winding the mesh belt, the temporary fixation needs to be released before the pressing operation by the rod body.

(4) In the tape winding device according to the above (1) to (3), it is preferable that the drive mechanism includes: an electric motor; a speed reducer for reducing the rotation of the motor; and a rotating body connected to one axial end of the winding roller and transmitting rotation generated by the motor to the winding roller. In this case, the winding roller can be rotated via the speed reducer and the rotating body by rotationally driving the motor.

(5) In the tape winding device according to the above (4), it is preferable that the rotating body has a short cylindrical projection fitted into an opening at one end in the axial direction of the winding roller, and a positioning pin that engages with a notch formed at one end in the axial direction of the winding roller is provided on a peripheral surface of the projection. In this case, the notch of the winding roller is engaged with the positioning pin on the peripheral surface of the convex portion of the rotating body, so that the winding roller can be easily connected to the rotating body of the driving mechanism. The driving force generated by the motor can be transmitted to the winding roller via the positioning pin.

[ detailed description of embodiments of the invention ]

The tape winding device of the present invention will be described in detail below. The present invention is not limited to these examples, but is defined by the claims, and includes all modifications equivalent to the claims and within the scope thereof.

Fig. 1 is an explanatory view of an example of a mesh-belt type continuous sintering furnace having a mesh belt wound by a belt winding device according to the present invention, and fig. 2 is an explanatory view of a belt winding device according to an embodiment of the present invention in a diagonal view.

The sintering furnace 1 has: a furnace body 2 formed by a flame-proof furnace made of metal or the like and having a dome-shaped cross section; and an endless mesh belt 3 which travels inside the furnace main body portion 2. The mesh belt 3 is made of stainless steel having high heat resistance such as SUS310, SUS316, or the like. A workpiece W made of a molded body obtained by press-molding metal powder such as iron powder is placed on the mesh belt 3.

The furnace body 2 has a degassing zone 4, a sintering zone 5, and a cooling zone 6 in this order from the inlet side (left side in fig. 1) toward the outlet side. The mesh belt 3 is provided with a drive pulley 7 provided on the inlet side of the furnace body 2 and a driven pulley 8 provided on the outlet side. The mesh belt 3 travels in the furnace main body 2 in a state where the drive pulley 7 is driven by a motor, not shown, provided in the vicinity of the drive pulley 7 and tensile stress is applied.

In the degassing zone 4, the workpiece W is heated to, for example, about 650 to 750 ℃ by a heating means such as a gas burner or an electric heater. While the work W passes through the deaeration zone 4, wax-like lubricant components such as zinc stearate and metal soap used when the metal powder is pressure-molded are thermally decomposed and removed.

The workpiece W having passed through the degassing zone 4 is then heated to a predetermined sintering temperature (for example, about 1100 to 1200 ℃) in the sintering zone 5. The heating can be performed using a heating element such as nichrome or Kanthal (Kanthal) provided in the sintering zone 5. In addition, during sintering, an atmosphere gas such as nitrogen gas or reformed gas is introduced into the sintering zone 5.

The workpiece W having passed through the sintering zone 5 is then cooled in the cooling zone 6 to, for example, about 900 to 100 ℃. The workpiece W that has undergone the sintering process through the cooling zone 6 is discharged from the discharge port 9 of the furnace main body 2, and is collected for movement to the subsequent step.

A plurality of conveyor rollers 10 are laid on the floor below the furnace body 2, and the mesh belt 3 discharged from the discharge port 9 of the furnace body 2 and passed through the driven pulley 8 travels on the conveyor rollers 10 and returns to the drive pulley 7.

A pit 11 is provided on the floor in front of the entrance of the furnace body 2. The pit 11 is a space for accommodating the mesh belt 3 that stretches due to high-temperature creep. The mesh belt 3 immediately after the replacement is shown by a two-dot chain line in fig. 1, but slightly droops downward as shown by a solid line as the sintering furnace 1 is operated. If the sagging becomes severe and the mesh belt 3 reaches the bottom surface 11a of the pit 11, the mesh belt 3 is deformed and cannot normally travel, and therefore, maintenance (cutting operation and connecting operation) of the mesh belt 3 needs to be performed in advance. The mesh belt 3 passed through the drive pulley 8 is guided by a plurality of guide rollers 12 and introduced into the furnace.

As shown in fig. 2, the tape winding device 20 according to the present embodiment includes: a winding roller 30 that winds the mesh belt 3 around the outer periphery; a drive mechanism 40 that rotates the winding roller 30; and a support mechanism 50 that rotatably supports the winding roller. The tape winding device 20 is provided on a base 21 having a substantially コ -shaped plan view. The base 21 is composed of a center member 22, a 1 st-side member 23 connected to one end of the center member 22, and a 2 nd-side member 24 connected to the other end of the center member 22. The 1 st side member 23 is provided with a drive mechanism 40, and the 2 nd side member 24 is provided with a support mechanism 50. Each member constituting the base 21 is made of steel. Conveying wheels 25 with stoppers are attached to the lower surfaces of the 1 st side member 23 and the 2 nd side member 24 near both ends thereof. The belt winding device 20 is freely movable to a place where the mesh belt 3 is wound by using the belt winding device 20, and the transport wheel 25 can be prevented from rotating by a stopper when in use. In the tape winding device 20 according to the present embodiment, when the power supply is separated from the tape winding device 20, a tray-like mounting table 62 on which a motorized pulley 61 for supplying power from the power supply to the driving mechanism 40 is mounted is provided on the upper surface of the 2 nd side member 24 in advance.

As shown in fig. 3, the take-up roll 30 is a hollow member having both ends open, and is made of a steel pipe. The winding roller 30 has a length (length in the axial direction) slightly larger than the width of the mesh belt 3 to be wound. In the present specification, "axial direction" refers to the longitudinal direction of the winding roller 30 and the tube axial direction. The one end side in the axial direction refers to a side (upper right side in fig. 3) of both sides in the axial direction of the winding roller 30, which is connected to the driving mechanism 30, and the other end side in the axial direction refers to a side (lower left side in fig. 3) of both sides in the axial direction of the winding roller 30, which is connected to the support mechanism 50.

An oblong opening 31 is formed in the outer peripheral surface 30a near the center of the winding roller 30 in the axial direction. The opening 31 is used when the end of the cut web sheet 3 is attached to the winding roll 30, as will be described later. Since the end of the mesh belt 3 is attached manually (by manual operation of an operator), the opening 31 has a size and shape that allows the operator's hand to enter the winding roller 30.

Fig. 4 is a cross-sectional explanatory view of the winding roller 30 shown in fig. 3. A hook 33 is provided at an edge 31a of the opening 31, and the hook 33 is used to lock a thread (see fig. 9B)32 attached to an end of the cut mesh belt 3. The hook 33 can be produced by processing a steel plate or the like, and is fixed to the inner circumferential surface 30b near the edge 31a of the winding roller 30 by welding or the like.

A wall 34 made of a steel plate or the like is provided inside the winding roller 30. Wall 34 is fixed to inner circumferential surface 30b of winding roller 30 by welding or the like. The wall 34 is used when the winding roller 30 is pulled out from the bundle of the mesh belt 3 wound around the outer periphery of the winding roller 30 in a roll shape after the winding of the mesh belt 3 is completed. The wall 34 is provided at a position where the tip end of the rod inserted from the opening 35 at one end of the winding roller 30 can abut, and the winding roller 30 can be pulled out from the roll-shaped mesh belt 3 by pressing the wall 34 in the axial direction (the axial direction of the winding roller 30) with the rod. The rod body can be, for example, a fork of a forklift. When the end of the mesh belt 3 is temporarily fixed to the winding roller by the thread 32 at the start of winding the mesh belt 3, the thread 32 engaged with the hook 33 needs to be detached from the hook 33 before the pressing operation by the rod.

As shown in fig. 5, the drive mechanism 40 is provided on the 1 st side member 23 of the base 21 located on one end side in the axial direction of the winding roller 30. The drive mechanism 40 includes: a motor 41; a speed reducer 42 provided above the motor 41 to reduce the rotation speed of the motor 41; and a rotating body 43 that transmits the rotation generated by the motor 41 to the winding roller 30 (see fig. 6 and 7). The rotation of the motor 41 is transmitted to the reduction gear 42 via a gear mechanism 44 provided above the motor 41 and a 1 st power transmission device 45 including a sprocket (not shown) and a roller chain (not shown). The rotation of the motor 41 decelerated by the decelerator 42 is transmitted to the take-up roll 30 via the 2 nd power transmission device 46 including a sprocket (not shown) and a roller chain (not shown), and the rotating body 43.

As shown in fig. 6, the rotating body 43 is provided concentrically with a sprocket 47 on the winding roller 30 side out of a pair of sprockets of the 2 nd power transmission device 46. The rotating body 43 is formed integrally with the shaft of the sprocket 47 on the winding roller 30 side. The rotating body 43 has a base 43a formed of a small-diameter cylindrical body and a projection 43b formed of a short cylindrical body having a larger diameter than the base 43 a. The base portion 43a is disposed in the 1 st case 27 having a cylindrical shape, and the 1 st case 27 is provided on the upper surface of the 1 st pillar portion 26 provided upright on the 1 st side member 23. A 1 st flange portion 28 is provided at an end portion of the 1 st case 27 on the winding roller 30 side. The 2 nd power transmission device 46 side end surface of the convex portion 43b faces the 1 st flange portion 28. A torque limiter (not shown) is provided at the base 43a of the rotating body 43 to prevent an overload from being applied to the motor 41 and the like constituting the driving mechanism 40 when the mesh belt 3 is wound.

The projection 43b is sized to be inserted into the opening 35 at one end in the axial direction of the winding roller 30. In other words, the diameter of the projection 43b is set to be smaller than the inner diameter of the winding roller 30 by about 1 mm. A positioning pin 48 is provided on the peripheral surface 43c of the convex portion 43 b. The positioning pin 48 can be engaged with the notch 36 formed at one end in the axial direction of the winding roller 30. When the winding roller 30 is attached to the tape winding device 20, the winding roller 30 can be easily connected to the rotating body 43 by engaging the notch 36 of the winding roller 30 with the positioning pin 48. The positioning pin 48 has a function of positioning, and also has a function of transmitting the driving force generated by the motor 41 to the winding roller 30. As the positioning pin 48, for example, a bolt embedded in the peripheral surface 43c of the convex portion 43b can be used.

The support mechanism 50 is provided on the 2 nd-side member 24 of the base 21 located on the other end side in the axial direction of the winding roller 30. The support mechanism 50 supports the winding roller 30 to be freely rotatable. In other words, the winding roller 30 is supported while allowing rotation of the winding roller 30. As shown in fig. 8, the support mechanism 50 includes: a pair of support rods 52 attached to the 2 nd pillar portion 51 provided upright on the 2 nd side member 24; a support body 53; the 2 nd housing 54; and a rod 55.

The support rod 53 is provided standing on a side surface 51a (a side surface on the 1 st-side member 23 side) of the 1 st pillar portion 51. A support plate 56 having a short cylindrical shape is provided at the front end of the support rod 53. The winding roller 30 is placed on the support plate 56. The diameter of the support plate 56 is set to be about 1mm larger than the diameter of the support rod 53 having a cylindrical shape. Thus, the winding roller 30 is supported by the support plate 56 in a state of being separated from the support rod 53.

The support 53 has: an insertion portion 57 inserted into an opening on the other end side of the winding roller 30; and a shaft portion 58 having one end connected to the rod 55 and the other end fixed to the insertion portion 57. A tapered portion 59 is formed at the tip of the insertion portion 57 so that the insertion portion 57 can be smoothly inserted into the opening at the other end side of the winding roller 30. Further, a 2 nd flange portion 60 is provided at a root portion of the insertion portion 57. When the insertion portion 57 is inserted into the opening of the winding roller 30, the side surface 60a of the 2 nd flange portion 60 abuts against the end surface 30c (see fig. 3) of the winding roller 30.

The 2 nd housing 54 is formed of a cylindrical member having a through hole, and the shaft portion 58 of the support 53 is provided in the through hole so as to be movable in the axial direction. The base of the rod 55 is rotatably attached to the 2 nd column portion 51, and as shown by an arrow in fig. 8, the support 53 can be moved to the 1 st-side member 23 side by pressing the rod 55 connected to one end of the shaft portion 58 in the axial direction toward the 1 st-side member 23 side, and the support 53 can be moved to the 2 nd-side member 24 side by pulling the rod 55 in the axial direction toward the 2 nd-side member 24 side.

Next, an example of a method of winding the web sheet 3 using the aforementioned tape winding device 1 will be described.

First, the coil winder 20 is installed on the inlet side of the furnace body 2 of the sintering furnace 1 and in the vicinity of the pit 11 (see fig. 1 and 9A).

Next, the mesh belt 3 is fixed to the guide rollers 12 using a wire or the like in the vicinity of the plurality of guide rollers 12, for example, indicated by a. For preventing the end of the mesh belt 3 from falling into the pit 11 when the mesh belt 3 described later is cut.

Next, the mesh belt 3 on the platen 13 located immediately before the entrance of the furnace main body portion 2 is cut. The cutting operation can be performed by pulling out pin members (not shown) provided in a direction orthogonal to the longitudinal direction (traveling direction) of the mesh belt 3, or by cutting the pin members with a screwdriver or the like when the pin members are deformed and cannot be pulled out.

Next, the wire 32 is attached to one end 3a (the end located on the left side in fig. 9A) of the cut web sheet 3 (see fig. 9B). Then, the one end portion 3a of the mesh belt 3 from which the fixing of the guide roller 12 is released is attached to the winding roller 30 of the belt winding-up device 20. At this time, as described above, the wire 32 is locked to the hook 33 provided at the edge 31a of the opening 31 of the winding roller 30 (see fig. 9C). This operation is performed by an operator holding the tip of the wire 32 and inserting the hand into the winding roller 30 from the opening 31 of the winding roller 30.

Next, a new mesh belt 3' wound into a roll shape is disposed on the platen 13 in front of the entrance of the furnace body 2, and the end thereof is connected to the other end 3b (the end located on the right side in fig. 9A) of the mesh belt 3 cut before.

Next, the driving mechanism 40 of the tape winding apparatus 1 and the driving pulley 7 of the sintering furnace 1 are driven. This enables the new webbing 3' to be disposed in parallel with the winding operation of the used webbing 3. The rotation speed of the motor 41 of the drive mechanism 40 and the motor for driving the drive pulley 7 was adjusted so that the moving speed of the mesh belt became about 40 cm/min.

[ other modifications ]

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

For example, in the above-described embodiment, the compact obtained by pressure-molding the metal powder such as iron powder is illustrated as the workpiece that is placed on the mesh belt and sintered in the sintering furnace, but other substances such as ceramics may be used as the object to be sintered.

Description of the reference numerals

1: sintering furnace

2: furnace body part

3: mesh belt

3': mesh belt

3 a: end part

3 b: end part

4: degassing zone

5: sintering zone

6: cooling zone

7: driving belt wheel

8: driven pulley

9: discharge port

10: conveying roller

11: pit

12: guide part

13: table board

20: tape winding device

21: base seat

22: center part

23: the 1 st side member

24: 2 nd side member

25: conveying wheel

26: the 1 st pillar part

27: no. 1 casing

28: 1 st flange part

30: winding roller

30 a: peripheral surface

30 b: inner peripheral surface

30 c: edge

31: opening part

32: thread

33: hook part

34: wall body

35: opening of the container

36: incision

40: driving mechanism

41: electric motor

42: speed reducer

43: rotating body

43 a: base part

43 b: convex part

43 d: peripheral surface

44: gear mechanism

45: 1 st power transmission device

46: 2 nd power transmission device

47: chain wheel

48: locating pin

50: supporting mechanism

51: the 2 nd pillar part

51 a: side surface

52: support rod

53: support body

54: no. 2 casing

55: rod

56: supporting plate

57: insertion part

58: shaft part

59: cone part

60: 2 nd flange part

61: electric roller

62: placing table

100: continuous sintering furnace

101: furnace body part

102: mesh belt

103: degassing zone

104: sintering zone

105: cooling zone

106: driving belt wheel

107: driven pulley

W: workpiece

Claims

1. A tape winding device for winding a mesh tape in a mesh tape type continuous sintering furnace in which a work placed on the mesh tape is sintered,

the belt winding device comprises:

a hollow winding roller that winds the mesh belt around the outer periphery;

the winding roller is detachably connected with the driving mechanism and the supporting mechanism,

a wall is provided on an inner peripheral surface of the winding roller, and a tip of the rod inserted from an opening at one end of the winding roller can abut against the wall.

2. The tape winding apparatus according to claim 1,

an opening is formed in the outer peripheral surface of the winding roller, and a hook capable of locking the wire attached to the end of the mesh belt is provided at the edge of the opening.

3. The tape winding apparatus according to claim 1 or 2,

the drive mechanism includes: an electric motor; a speed reducer for reducing the rotation of the motor; and a rotating body connected to one axial end of the winding roller and transmitting rotation generated by the motor to the winding roller.

4. The tape winding apparatus according to claim 3,

the rotating body has a short cylindrical projection fitted into an opening at one axial end of the winding roller, and a positioning pin engaged with a notch formed at one axial end of the winding roller is provided on the peripheral surface of the projection.