CN110270938B

CN110270938B - Residual spray material removing device

Info

Publication number: CN110270938B
Application number: CN201910151917.4A
Authority: CN
Inventors: 本多胜利
Original assignee: Nissei Sogyo Co ltd
Current assignee: Nissei Sogyo Co ltd
Priority date: 2018-03-16
Filing date: 2019-02-28
Publication date: 2021-04-06
Anticipated expiration: 2039-02-28
Also published as: JP6511706B1; KR20190109189A; KR102096921B1; CN110270938A; JP2019155581A

Abstract

The invention provides a cleaning device for removing residual spray material of residual spray material in a hollow part, which can easily change the direction of a cast product even when the cast product with the hollow part of which the inner wall surface is subjected to shot blasting grinding by the spray material is a heavy object. A residual spray material removing device is characterized in that a containing part formed by a free roller group and having a cross section of 'コ' shape and a free roller group for closing the opening of the containing part in a freely openable and closable manner are arranged in a rotating body which is rotated by a driving motor which rotates intermittently in forward and reverse directions and is simultaneously vibrated by a vibrating motor, a casting product is contained in the containing part of which the opening is closed by the free roller group for closing, and the casting product is intermittently rotated and vibrated in the forward and reverse directions to change the orientation and position of the casting product, thereby removing the residual spray material in the hollow part.

Description

Residual spray material removing device

Technical Field

The present invention relates to a residual blasting material removing apparatus that removes blasting material remaining in a hollow portion opened in a surface of a cast product from the hollow portion by shot peening an inner wall surface of the hollow portion.

Background

When a cast product having a hollow portion with an opening on the surface is taken out of a mold, core sand is clogged in the hollow portion, and the core sand needs to be peeled off and removed from the hollow portion. In the case of removing such core sand by peeling, shot blasting may be performed by using a shot blasting machine described in patent documents 1 to 3. In this shot blasting, the compressed air and the blasting material in a mixed state are ejected from the ejection port at the tip end portion of the nozzle inserted into the hollow portion of the cast product, whereby the core sand can be peeled and removed from the hollow portion.

Documents of the prior art

Patent documents:

patent document 1: japanese patent No. 5688607

Patent document 2: japanese patent No. 5688608

Patent document 3: japanese patent No. 5688610

Disclosure of Invention

Problems to be solved by the invention

By blasting the hollow portion of the cast product with the blasting material using the blasting machine described in patent documents 1 to 3, it is possible to strip and remove core sand clogged in the hollow portion having a complicated shape and simultaneously blast-grind the inner wall surface of the hollow portion. On the other hand, the shot-blasted material remains in the hollow portion of the cast product subjected to the shot blasting, and the remaining shot-blasted material (hereinafter, simply referred to as "residual shot-blasted material") needs to be removed. The residual spray material is not attached to the inner wall surface of the hollow portion, and can be easily removed by blowing compressed air into the hollow portion or changing the orientation of the cast product.

However, it is not preferable from the viewpoint of work efficiency to remove the residual shot material in the hollow portion of the cast product by using a human hand. Further, when the cast product is a heavy object, it is also difficult to change the orientation or the like of the cast product.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a residual spray material removing device which can remove residual spray material in a hollow portion by easily changing the orientation of a cast product even when the cast product is a heavy object.

Means for solving the problems

The present invention, which can solve the above problems, is a device for removing residual blasting material, which removes the blasting material remaining in a hollow portion opened in a surface of a cast product from the hollow portion by shot blasting an inner wall surface of the hollow portion, comprising: a driving shaft rotatably supported by a pair of support bases and driven by a driving motor that can rotate intermittently in forward and backward directions, the pair of support bases being erected on a base at a predetermined distance from each other, the base being supported on a base via a vibration absorbing member, and a driven shaft that rotates in accordance with the rotation of the driving shaft; a rotating body including a housing portion rotatably mounted between the drive shaft and the driven shaft, into which the cast product is inserted and housed from an opening portion, and an opening and closing mechanism that opens and closes the opening portion; and a vibration motor that applies vibration to the base to which the rotating body is attached. The cross-sectional shape of the storage section is "コ" and the side wall and the bottom of the storage section are formed by a free roller group including a plurality of free rollers rotatably arranged in parallel with a gap through which the ejection material can pass, and the opening and closing mechanism includes a free roller group for closing which is formed by a plurality of free rollers rotatably arranged in parallel with a gap through which the ejection material can pass so as to close the opening and a rotational driving mechanism which rotates the free roller group for closing so as to be positioned at a closing position and an opening position of the opening.

The housing portion is formed of a pair of plates attached to the drive shaft and the driven shaft and facing each other, and the free roller group is erected between the pair of plates. Accordingly, the plurality of free rollers constituting the free roller group can be reliably arranged in parallel in a freely rotatable manner.

The rotation drive mechanism includes: a pair of arm members rotatably provided outside the housing section, and over which the set of closing free rollers is erected; and a rotation driving device which rotates the pair of arm members so that the closing free roller group is positioned at a closing position and an opening position of the opening. Thus, the opening of the housing section can be smoothly opened and closed.

The present invention is provided with a rotation driving device, wherein the pair of arm members are provided with two sets, the plurality of free rollers for blocking constitute a part of the free roller set for blocking, and are freely rotatably mounted on one set of the pair of arm members, and the plurality of free rollers for blocking constituting the other part of the free roller set for blocking are freely rotatably mounted on the other set of the pair of arm members, and the rotation driving device applies rotation to each set of the pair of arm members so that each free roller for blocking mounted on each set of the pair of arm members is located at a blocking position and an opening position of the opening. Accordingly, the opening and closing of the opening of the housing section can be easily performed.

The rotation driving device is an air cylinder. Accordingly, the structure of the residual injection material removing device of the present invention can be simplified.

The rotation driving device is a cylinder rotating together with the housing part, and compressed air can be easily supplied to and discharged from the cylinder rotating together with the housing part by using an air universal joint in an air supply and discharge passage leading to the cylinder. Wherein, this air universal joint possesses: a 1 st air hole opened in an outer peripheral surface of the driven shaft; an air passage which is inserted through the central axis of the driven shaft and is connected to the 1 st air hole; a fixed sleeve inserted into an end of the driven shaft and locked; a circumferential groove provided around an outer circumferential surface of an end portion of the driven shaft in sliding contact with an inner circumferential surface of the fixed sleeve; a 2 nd air hole opened in the circumferential groove and connected to the air passage; and an air supply and discharge port formed on the fixing sleeve corresponding to the circumferential groove, for supplying and discharging compressed air to the circumferential groove.

The cylinders are disposed at respective outer sides of the pair of plate bodies. Accordingly, the pair of arm members can be reliably rotated to the predetermined position.

The cylinder is provided with a lock mechanism that holds the pair of arm members at predetermined positions when the supply of compressed air is stopped, and can maintain a closed state of the opening of the storage section by the free roller for closing. Accordingly, even if the supply of compressed air is stopped due to an accident or the like when the housing section housing the cast product is rotated, the cast product can be prevented from falling off from the housing section, and safety can be achieved.

The present invention is provided with a control unit for controlling the drive motor. Accordingly, the start rotation, stop rotation time, rotation direction, rotation speed, and the like of the rotating body having the storage portion in which the cast product is stored can be controlled, and the residual shot material can be removed from the hollow portion without damaging the cast product.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the residual spray material removing apparatus of the present invention, the side wall portion and the bottom portion are formed by the plurality of free rollers, the cast product is accommodated in the accommodating portion in which the opening portion is closed by the closing free rollers, and the accommodating portion is intermittently rotated while applying vibration by the vibration motor. The cast product stored in the storage section slides on a free roller forming a side wall portion and a bottom portion or a free roller for closing an opening portion in accordance with the rotation of the storage section, and is subjected to vibration while changing the position and orientation. Therefore, when the cast product is oriented in the predetermined direction, the residual shot in the hollow portion of the cast product is removed from the opening portion of the hollow portion, and is discharged to the outside of the housing portion from the gap between the free rollers of the housing portion or the gap between the free rollers for closing. Therefore, even when the cast product is a heavy object, the device for removing residual shot material according to the present invention can easily apply vibration while changing the position and orientation of the cast product, and can reliably remove the residual shot material in the hollow portion of the cast product.

Drawings

Fig. 1 is a front view showing an example of a residual spray material removing apparatus according to the present invention.

Fig. 2 (a) is a front view of the rotating body R shown in fig. 1, and fig. 2 (b) is a cross-sectional view of the plane a-a of fig. 2 (a).

Fig. 3 (a) is a cross-sectional view taken on the X-X plane shown in fig. 1, and fig. 3 (b) shows a state in which the opening of the storage section 32 shown in fig. 3 (a) is opened.

Fig. 4 is a piping diagram illustrating air piping leading to the

cylinders

42a and 42b shown in fig. 1.

Fig. 5 is a partial sectional view illustrating the structure of an air universal joint provided on the driven shaft 18b shown in fig. 1.

Fig. 6 is an explanatory diagram for explaining the relationship between the

proximity sensors

92a and 92b and the sensor device 90 provided on the end surface of the driven shaft 18b shown in fig. 1.

Fig. 7 (a) is a schematic diagram showing the provision of a multistage acceleration mechanism and a multistage deceleration mechanism in the inverter 26 shown in fig. 1, and fig. 7 (b) is a diagram showing a rotation speed pattern of the drive motor 24.

Fig. 8 is a cross-sectional view of the rotating body R shown in fig. 2, showing the orientation of the cast product P in the housing 32, and the like, when the rotating body R rotates in the forward direction.

Fig. 9 is a cross-sectional view of the rotating body R shown in fig. 2, showing the orientation of the cast product P in the housing 32, and the like, when the rotating body R rotates in the reverse direction.

Description of the reference numerals

10: cleaning device

12: base station

14: rubber spring

16: base seat

16a, 16 b: a pair of supporting tables

18 a: drive shaft

18 b: driven shaft

20a, 20 b: plate body

22a, 22 b: bearing assembly

24: driving motor

25：PLC

26: inverter with a voltage regulator

28: reinforced plate

30: free roller set

30 a: free roller

31: opening part

32: storage part

34: free roller set for blocking

34a, 34b, 34c, 34 d: free roller for blocking

36a, 36 b: a pair of arm members

36c, 36 d: a pair of arm members

38a, 38 b: reinforced plate

39a, 39 b: shaft

40: vibration motor

41a, 41b, 41c, 41 d: roller mounting plate

42a, 42 b: cylinder

50: air piping

52: check valve

54: three-way electromagnetic valve

54a, 54 b: solenoid coil (Solenoid coil)

56a, 56b, 56c, 56 d: speed controller

58a, 58 b: pressure switch

60: storage container

70: air universal joint

72a, 72 b: air hole

74a, 74 b: air passage

76: ring body

78: fixing sleeve

80 a: circumferential groove

82a, 82 b: air hole

84a, 84 b: air supply port

86: o-shaped ring

90: sensing device

90a, 90b, 90c, 90 d: protrusion part

92a, 92 b: proximity sensor

M, N: arrow head

P: cast product

Q: control unit

R: rotating body

S: the sprayed material remains.

Detailed Description

The present invention will be described in detail below, but the scope of the present invention is not limited thereto.

Fig. 1 shows an example of the residual spray material removing apparatus according to the present invention. Fig. 1 is a front view of a residual spray material removal device 10. In the residual spray material removing apparatus 10, a base 16 is supported on a base 12 via a plurality of rubber springs 14 as vibration absorbing members. A pair of

support bases

16a and 16b are provided upright on the base 16 at a predetermined distance. The base 16 is vibrated by a vibration motor 40 provided at a lower portion thereof.

The rubber spring 14 is a composite spring formed by combining rubber and a metal spring, and has a high-load performance, an effect of reducing resonance amplitude, and a sound-insulating and shock-absorbing effect.

The drive shaft 18a and the driven shaft 18b are rotatably supported on a pair of

support bases

16a, 16b of the base 16 via

bearings

22a, 22 b. A drive motor 24 is attached to one end of the drive shaft 18a, and the driven shaft 18b rotates in accordance with the rotation of the drive shaft 18 a. The drive motor 24 can be intermittently rotated in forward and reverse directions by an inverter 26. The inverter 26 controls the timing, the rotation stop time, the rotation direction, the rotation speed, and the like of starting and stopping the rotation of the drive motor 24 by a PLC (programmable Logic controller)25 (hereinafter, abbreviated as "PLC 25") as a control unit. A rotating body R is provided between the other end of the drive shaft 18a and one end of the driven shaft 18 b. The rotating body R is provided with a housing portion 32, and the housing portion 32 is configured to receive a cast product by inserting the cast product through the opening.

Further, below the rotary body R, a storage container 60 for storing the residual shot material removed from the hollow portion of the cast product stored in the storage portion 32 is provided.

As shown in fig. 2 (a), the housing portion 32 provided in the rotating body R is formed between the pair of

plate bodies

20a and 20b attached to face the other end of the drive shaft 18a and the one end of the driven shaft 18 b. The pair of

plate bodies

20a, 20b are reinforced by the reinforcing plate 28 being provided therebetween, and a free roller group 30 is provided between the pair of

plate bodies

20a, 20b, the free roller group 30 being constituted by a plurality of free rollers 30a rotatably provided in parallel with each other with a gap through which the injection material can pass. As shown in fig. 2 (b) which is a cross-sectional view of the plane a-a of fig. 2 (a), the free roller group 30 forms side wall portions and bottom portions of the accommodating portions 32 having a cross-sectional shape of "コ". As shown in fig. 2 (b), the opening 31 for inserting and removing the cast product, which is opened in the storage section 32, is closed by a closing free roller group 34 composed of closing

free rollers

34a, 34b, 34c, and 34 d. The plurality of blocking free rollers constituting the blocking free roller group 34 are also rotatably arranged in parallel with a gap through which the injection material can pass.

The closing free roller group 34 is provided to freely open and close the opening 31 of the housing 32. That is, the blocking

free rollers

34a and 34b constituting a part of the blocking free roller group 34 are attached between the pair of

arm members

36a and 36b provided outside the housing section 32. The pair of

arm members

36a and 36b are shaped like "く", and rear end portions thereof are rotatably attached to end portions of the shafts 39a extending between the pair of

plate bodies

20a and 20b, and are reinforced by the reinforcing plate 38a extending between the top ends thereof.

Roller mounting plates

41a, 41b are provided to face each other at positions of the reinforcing plate 38a corresponding to the distal ends of the pair of

plate bodies

20a, 20b, and blocking

free rollers

34a, 34b are rotatably mounted between the

roller mounting plates

41a, 41 b.

The blocking

free rollers

34c and 34d constituting the remaining portion of the blocking free roller group 34 are also mounted between a pair of

arm members

36c and 36d provided outside the housing section 32. The pair of

arm members

36c and 36d are also shaped like "く", and rear end portions thereof are rotatably attached to end portions of the shaft 39b extending between the pair of

plate bodies

20a and 20b, and are reinforced by a reinforcing plate 38b extending between the top ends thereof.

Roller mounting plates

41c, 41d are provided to face each other at positions of the reinforcing plate 38b corresponding to the distal ends of the pair of

plate bodies

20a, 20b, and blocking

free rollers

34c, 34d are rotatably mounted between the

roller mounting plates

41c, 41 d.

The pair of

arm members

36a, 36b, 36c, 36d of the two sets are rotationally driven by

air cylinders

42a, 42b as rotational driving means. The air cylinder 42a is provided on the drive shaft 18a side, and the air cylinder 42b is provided on the driven shaft 18b side. In fig. 3 (a), which is a cross-sectional view of the X-X plane of fig. 1, the air cylinder 42b on the driven shaft 18b side is shown. The air cylinder 42b is provided between the

arm members

36b and 36d, and rotates the arm member 36b about the shaft 39a as a rotation center, and also rotates the arm member 36d about the shaft 39b as a rotation center. Further, the air cylinder 42a provided on the drive shaft 18a side is provided between the

arm members

36a, 36c, and rotates the arm member 36a with the shaft 39a as a rotation center, and also rotates the arm member 36c with the shaft 39b as a rotation center. These

air cylinders

42a, 42b are driven in synchronization, and the opening 31 of the storage section 32 is opened and closed by the closing free roller group 34 that is bridged between the tip ends of the pair of

arm members

36a, 36b, 36c, 36d of the two sets. Fig. 3 (a) shows a state in which the pair of

arm members

36a, 36b, 36c, and 36d of the two sets have been rotated in a direction in which the opening 31 of the storage section 32 is closed by the closing free roller set 34. Fig. 3 (b) shows a state in which the pair of

arm members

36a, 36b, 36c, and 36d of the two sets have been rotated in a direction in which the opening 31 of the closed housing section 32 is opened by the closing free roller set 34.

Compressed air is supplied to and discharged from the

air cylinders

42a and 42b through an air pipe 50 shown in fig. 4. The compressed air having passed through the check valve 52 is supplied to the O side or the C side partitioned by the pistons of the

cylinders

42a, 42b via the three-way solenoid valve 54 and the

speed controllers

56a, 56b, 56C, 56 d. The pressure on the O side of the

cylinders

42a, 42b is adjusted to a predetermined value by the pressure switch 58a, and the pressure on the C side of the

cylinders

42a, 42b is also adjusted to a predetermined value by the pressure switch 58 b.

The three-way solenoid valve 54 includes: an application port that applies the compressed air that has passed through the check valve 52 at any time; a supply port that supplies the compressed air of the application port to the O side or the C side of the

cylinders

42a, 42 b; an exhaust port for discharging the compressed air held on the O side or C side of the

cylinders

42a and 42 b; a neutral port which is not connected to the supply port and the discharge port; and

solenoid coils

54a, 54 b. The solenoid coils 54a and 54b are connected to one of the supply port and the discharge port of the three-way solenoid valve 54 and to one of the O side and the C side of the

cylinders

42a and 42b, or to the neutral port of the three-way solenoid valve 54 and to the O side and the C side of the

cylinders

42a and 42 b.

When the supply port of the three-way solenoid valve 54 is connected to the O side of the

cylinders

42a and 42b by the solenoid coils 54a and 54b, the discharge port of the three-way solenoid valve 54 is also connected to the C side of the

cylinders

42a and 42 b. Therefore, the compressed air at the inlet of the three-way solenoid valve 54 is supplied from the supply port to the O side of the

cylinders

42a, 42b while the supply amount is adjusted by the

speed controllers

56a, 56b, and the compressed air held at the C side of the

cylinders

42a, 42b is discharged from the discharge port of the three-way solenoid valve 54 while the discharge amount is adjusted by the speed controllers 56C, 56 d. At this time, the pistons in the

air cylinders

42a and 42b move to the side C, and as shown in fig. 3 (a), the pair of

arm members

36a, 36b, 36C, and 36d of the two sets can be rotated so that the opening 31 of the storage section 32 is closed by the closing free roller group 34.

On the other hand, when the supply port of the three-way solenoid valve 54 is connected to the C side of the

cylinders

42a and 42b by the solenoid coils 54a and 54b, the discharge port of the three-way solenoid valve 54 is connected to the O side of the

cylinders

42a and 42b, and the pistons in the

cylinders

42a and 42b move to the O side, as shown in fig. 3 (b), the pair of

arm members

36a, 36b, 36C, and 36d of the two sets can be rotated so that the opening 31 of the closed housing portion 32 is opened by the closing free roller set 34.

When the neutral port of the three-way solenoid valve 54 and the O-side and C-side of the

cylinders

42a and 42b are connected by the solenoid coils 54a and 54b, the pressures on the O-side and C-side of the

cylinders

42a and 42b are maintained at predetermined values, and the pistons are stationary at predetermined positions. At this time, the pair of

arm members

36a, 36b, 36c, 36d of the two sets are in a stationary state.

In general, when the rotary body R is rotated, the neutral port of the three-way solenoid valve 54 and the O and C sides of the

cylinders

42a and 42b are connected by the solenoid coils 54a and 54b, and the opening 31 of the housing portion 32 is kept closed by the closing free roller group 34.

However, in order to maintain the state in which the opening 31 of the storage section 32 is closed by the closing free roller group 34 even when the supply of the compressed air is stopped due to an accident or the like during the rotation of the rotary body R, it is preferable to employ

cylinders

42a and 42b provided with a lock mechanism capable of maintaining the pair of

arm members

36a, 36b, 36c, and 36d of the two sets at predetermined positions and maintaining the opening 31 of the storage section 32 in the closed state by the closing free roller group 34.

The supply and discharge of the compressed air to and from the

air cylinders

42a and 42b provided in the rotary body R are performed through an air universal joint 70 shown in fig. 5 provided at the other end of the driven shaft 18 b. The air universal joint 70 includes:

air passages

74a, 74b connected to the 1

st air holes

72a, 72b opened in the outer peripheral surface of the other end portion of the driven shaft 18b and passing through the central axis of the driven shaft 18 b; a fixed sleeve 78 mounted on the driven shaft 18b at a position closer to the distal end than the bearing 22b and locked by a ring body 76 erected on the base 16;

circumferential grooves

80a and 80b provided around the outer circumferential surface of the end portion of the driven shaft 18b in sliding contact with the inner circumferential surface of the fixed sleeve 78; 2

nd air holes

82a, 82b that open into the

circumferential grooves

80a, 80b and are connected to the

air passages

74a, 74 b; and

air supply ports

84a, 84b formed in the fixed sleeve 78 in correspondence with the

circumferential grooves

80a, 80b for supplying compressed air to the

circumferential grooves

80a, 80 b. The

circumferential grooves

80a and 80b are formed and sealed between the O-rings 86, and the 1

st air holes

72a and 72b and the

cylinders

42a and 42b are connected by pipes provided in the rotary body R.

According to the air universal joint 70, the compressed air supplied from the

air supply ports

84a, 84b to the

circumferential grooves

80a, 80b of the rotating driven shaft 18b is supplied from the

air supply ports

84a, 84b to the 1

st air holes

72a, 72b opened in the outer peripheral surface of the end portion of the driven shaft 18b through the 2

nd air holes

82a, 82b opened in the

circumferential grooves

80a, 80b via the

air passages

74a, 74b by externally connecting the supply/discharge pipes of the compressed air to the

air supply ports

84a, 84b of the stationary sleeve 78. The compressed air is supplied to and discharged from the 1

st air holes

72a and 72b to the

cylinders

42a and 42b through a pipe provided in the rotary body R.

As a detection means for detecting the rotational position of the rotary body R, a sensing device 90 mounted on the end surface of the driven shaft 18b provided with the air universal joint 70, and

proximity sensors

92a, 92b are employed as shown in fig. 5. As shown in fig. 6 (a) (b), in the sensor device 90, the

projections

90a, 90b, 90c, 90d protrude in a cross shape, and the projection 90a protrudes longer than the other projections. Among the

proximity sensors

92a and 92b that transmit detection signals to the PLC25 (fig. 1), the proximity sensor 92a is disposed at a position where the

protrusions

90a, 90b, 90c, and 90d can be detected, and the proximity sensor 92b is disposed at a position where only the long protrusion 90a can be detected. Thus, the longer protrusion 90a can be detected by both the

proximity sensors

92a, 92b, while the

protrusions

90b, 90c, 90d can be detected only by the proximity sensor 92 a.

For example, as shown in fig. 6 (a), when the protrusion 90a is located at the position of the

proximity sensors

92a and 92b, the

proximity sensors

92a and 92b detect the protrusion 90a together and transmit a detection signal to the PLC 25. When the rotating body R rotates by approximately 45 ° from this state, and the

protrusions

90a, 90b, 90c, and 90d reach the positions 90 'a, 90' b, 90 'c, and 90'd, all the protrusions cannot be detected by the

proximity sensors

92a and 92 b. As the rotating body R continues to rotate, when the protrusion 90d reaches the position of the proximity sensor 92a as shown in fig. 6 (b), the proximity sensor 92a detects the protrusion 90d and transmits a detection signal to the PLC25, and since the proximity sensor 92b does not detect any protrusion, the PLC25 can detect that the rotating body R has rotated 90 ° from the position shown in solid line in fig. 5 (a).

When the position (see fig. 5 (a)) at which the rotating body R receives the detection signals transmitted from both the

proximity sensors

92a and 92b from the PLC25 is rotated by 90 ° in the forward direction (see fig. 5 (b)), and the PLC25 that receives the detection signals from the

proximity sensors

92a and 92b receives only the detection signal from the proximity sensor 92a, the PLC25 transmits a signal "the rotating body R is rotated by 90 ° in the forward direction" to the inverter 26, and the inverter 26 that receives the signal stops driving the drive motor 24 (fig. 1). When the timer in the PLC25 determines that the predetermined time has elapsed, the inverter 26 drives the drive motor 24 again in response to the signal from the PLC25, and the normal rotation of the rotary body R is restarted. As described above, the PLC25 intermittently drives the drive motor 24 in the forward direction with the inverter 26 to intermittently rotate the rotary body R in the forward direction by 90 ° each time. The PLC25 that has received the detection signals from both the

proximity sensors

92a and 92b again transmits a signal "the revolution solid R has rotated 360 ° in the forward direction" to the inverter 26, and the inverter 26 that has received the signal stops driving the drive motor 24, thereby ending the forward rotation of the revolution solid R.

When the timer in the PLC25 determines that a predetermined time has elapsed since the end of the forward rotation, the inverter 26 drives the drive motor 24 in the reverse direction based on the signal from the PLC25, and the rotor R starts rotating in the reverse direction. The PLC25, which has received the detection signal from the proximity sensor 92a, transmits a signal indicating that the rotation body R has rotated 90 ° in the reverse direction to the inverter 26, and the inverter 26, which has received the signal, stops the drive of the drive motor 24. When the timer in the PLC25 determines that the predetermined time has elapsed, the inverter 26 drives the drive motor 24 again in response to the signal from the PLC25, and the rotating body R resumes the reverse rotation. As described above, the PLC25 and the inverter 26 intermittently reverse-drive the drive motor 24 to intermittently reverse-rotate the rotary body R by 90 ° at a time. The PLC25 that has received the detection signals from both the

proximity sensors

92a and 92b again transmits a signal "the reverse rotation of the rotating body R has been rotated 360 °, and the inverter 26 that has received this signal stops driving the drive motor 24, thereby ending the reverse rotation of the rotating body R.

It is preferable that the PLC25 and the inverter 26 control the start of driving, stop of driving, and rotation direction of the drive motor 24, and that the inverter 26 include a multistage acceleration mechanism and a multistage deceleration mechanism as shown in fig. 7 (a).

The multistage acceleration mechanism is a mechanism that gradually accelerates the drive motor 24, which starts driving, to a constant rotational speed within a predetermined time. The multistage deceleration mechanism is a mechanism that gradually decelerates the drive motor 24 driven at a constant rotational speed to a stopped state over a predetermined time. According to the inverter 26 having the multistage acceleration mechanism and the multistage deceleration mechanism, the rotational speed of the drive motor 24 can be gradually accelerated from the start of driving to the constant rotational speed, and can be gradually decelerated to the stopped state after the constant rotational speed is maintained for a predetermined time, as shown in fig. 7 (b). By setting the rotation speed of the drive motor 24 to the pattern shown in fig. 6 (b), the position or orientation of the cast product housed in the housing portion 32 of the rotary R can be gradually changed, thereby preventing damage to the cast product due to a sudden change in the position or orientation thereof.

A method of removing the residual blasting material in the hollow portion of the cast product P using the residual blasting material removing apparatus described with reference to fig. 1 to 7 will be described with reference to fig. 8 and 9. First, the

air cylinders

42a and 42b are driven to open the opening 31 of the storage section 32 closed by the closing free roller group 34 as shown in fig. 3 (b), and then the cast product P is stored in the storage section 32 from the opening 31 as shown in fig. 8 (a). The cast product P has a rectangular cross section, and a hollow portion is open at an upper surface and one side surface, and has residual shot material S in the hollow portion.

Then, the

air cylinders

42a and 42b are driven again, the opening 31 of the storage section 32 is closed by the closing free roller group 34 as shown in fig. 3 b, the drive motor 24 is driven, and the rotation body R including the storage section 32 in which the cast product P is stored starts to rotate in the normal direction (the direction of arrow M) as shown in fig. 8 b. At the same time as the rotation of the rotary body R is started, the vibration motor 40 (fig. 1) is activated, and the base 16 vibrates, so that the cast product P stored in the storage portion 32 of the rotary body R also vibrates and slides on the free rollers 30a of the free roller group 30 with the rotation of the rotary body R, changing its orientation and position. To gradually change the orientation and position of the cast product P, it is preferable that the rotational speed of the rotating body R be gradually accelerated from the start of rotation to the constant rotational speed, and then gradually decelerated to a stopped state after the constant rotational speed is maintained for a predetermined time, as shown in fig. 7 (b).

Then, the vibration motor 40 is continuously driven until the cleaning work of the residual sprayed material S in the hollow portion of the cast product P is finished.

As shown in fig. 8 (c), when the rotating body R is rotated in the forward direction by 90 °, and only the proximity sensor 92a ((b) of fig. 6) detects the protrusion 90d of the sensing device 90, the rotation of the rotating body R is suspended. During the pause of the revolution solid R, the vibration motor 40 is still driven, and the revolution solid R is still continuously vibrated. The cast product P shown in fig. 8 (c) is also rotated by 90 ° from the orientation of the cast product P when stored in the storage section 32 shown in fig. 8 (b), but the hollow section is not opened to the lower surface of the cast product P, and the residual shot material S in the hollow section cannot be removed.

After the pause time is finished, the normal rotation of the rotor R is resumed, and the rotor R is rotated by 90 ° again as shown in fig. 8 (d). The housing section 32 of the rotating body R shown in fig. 8 (d) is in a state where the bottom is formed by the closing free roller group 34, and the cast product P is also rotated by 180 ° from the orientation of the cast product P when housed in the housing section 32 shown in fig. 8 (b). The cast product P in the above-described direction has a hollow portion opened on the lower surface, and the residual shot material S in the hollow portion is removed, discharged from the gap of the closing free roller group 34 to the outside of the housing portion 32, and housed in the housing container 60 (fig. 1).

After the pause time is again ended, the normal rotation of the revolution solid R is resumed, and as shown in fig. 8 (e), the revolution solid R is rotated again by 90 °, and the rotation of the revolution solid R is suspended. The housing portion 32 of the rotating body R shown in fig. 8 (e) is in a state where the bottom portion is formed by the free roller group 30 forming the side surface of the housing portion 32 in fig. 8 (a), and the cast product P is also rotated by 90 ° from the orientation of the cast product P when housed in the housing portion 32 shown in fig. 8 (d). The cast product P in the above-described orientation has a hollow portion opened on the lower surface, and the residual shot material S in the hollow portion is removed, discharged from the gap of the free roller group 30 to the outside of the housing portion 32, and housed in the housing container 60.

When the pause time is over, the normal rotation of the rotating body R is resumed and the rotating body R is rotated again by 90 °, and the state of fig. 9 (a) is reached, both the

proximity sensors

92a and 92b (fig. 6 (a)) detect the protrusion 90a of the sensor device 90, and the rotation of the rotating body R is paused. Although the shot material is not substantially left in the interior of the hollow portion having the one open side and the upper surface of the cast product P in the housing portion 32 shown in fig. 9a by the normal rotation of the rotating body R shown in fig. 8b to 8 e, the rotating body R should be rotated in the reverse direction (the direction of the arrow N) as shown in fig. 9a after the elapse of the pause time in order to completely remove the residual shot material S in the hollow portion. The reverse rotation of the rotary body R is intermittently rotated by 90 ° at a time while applying vibration from the vibration motor 40, similarly to the forward rotation shown in fig. 8 (b) to 8 (e).

Fig. 9 (b) shows a state in which the rotating body R is suspended after rotating in the reverse direction by 90 °, and if the residual shot material S remains in the hollow portion opened in the lower surface of the cast product P, the removal can be performed. Fig. 9 (c) shows a state in which the rotating body R is suspended after rotating in the reverse direction by 90 ° from the state shown in fig. 9 (b), and the residual shot material S remains in the hollow portion opened in the lower surface of the cast product P, and thus the removal can be performed. Fig. 9 (d) is a state of being suspended after being rotated in reverse by 90 ° from the state shown in fig. 9 (c), and since there is no hollow portion opened to the lower surface of the cast product P, the residual shot material S in the hollow portion cannot be removed. When the cast product P is rotated in the reverse direction by 90 ° from the state shown in fig. 9 (d) and is again in the state shown in fig. 9 (a), the cleaning operation of the residual shot material S in the hollow portion of the cast product P is completed, and the driving of the drive motor 24 and the vibration motor 40 is stopped.

Then, the

air cylinders

42a and 42b are driven to open the opening 31 of the storage section 32 closed by the closing free roller group 34 as shown in fig. 3 (b), and the cast product P in the storage section 32 is taken out from the opening 31 as shown in fig. 9 (e). The shot material S does not remain in the hollow portion of the cast product P.

According to the residual shot removing device shown in fig. 1 to 9, the residual shot in the hollow portion of the cast product P can be removed from the opening portion of the hollow portion when the cast product P is oriented in the predetermined direction because the cast product P accommodated in the accommodating portion 32 formed by the free roller group 30 and the blocking free roller group 34 is intermittently rotated while being vibrated. Therefore, even when the cast product P is a heavy object, the position and orientation of the cast product P can be easily changed while applying vibration, and the residual shot material in the hollow portion of the cast product P can be reliably removed.

Industrial applicability

The residual blasting material removing device of the present invention is suitable for a device for removing residual blasting material remaining in a hollow portion in which an inner wall surface is subjected to shot peening from a cast product.

Claims

1. A device for removing residual shot material, which removes shot material remaining in a hollow portion opened in a surface of a cast product from the hollow portion by shot peening an inner wall surface of the hollow portion,

the disclosed device is provided with:

a driving shaft rotatably supported by a pair of support bases and driven to rotate by a driving motor capable of rotating intermittently in forward and reverse directions, the pair of support bases being erected on a base at a predetermined distance from each other, the base being supported on a base via a vibration absorbing member, and a driven shaft rotating in accordance with the rotation of the driving shaft;

a rotating body including a housing portion rotatably attached between the drive shaft and the driven shaft, into which the cast product is inserted and housed through an opening, and an opening and closing mechanism that opens and closes the opening; and

a vibration motor that applies vibration to the base to which the rotating body is attached,

the cross-sectional shape of the storage part is コ, the side wall and the bottom of the storage part are formed by a free roller group, the free roller group is composed of a plurality of free rollers which are arranged in parallel in a rotatable manner at intervals and can allow the injection material to pass through,

the opening/closing mechanism includes a closing free roller group including a plurality of closing free rollers rotatably arranged in parallel with a gap through which the ejection material can pass so as to be capable of closing the opening, and a rotation driving mechanism for rotating the closing free roller group so that the closing free roller group is positioned at a closing position and an opening position of the opening.

2. The residual spray material removing apparatus according to claim 1,

the housing portion is formed of a pair of plates attached to the drive shaft and the driven shaft and facing each other, and the free roller group is erected between the pair of plates.

3. The residual spray material removing apparatus according to claim 1,

the rotation drive mechanism includes:

a pair of arm members rotatably provided outside the housing section, and over which the closing free roller group is erected; and

and a rotation driving device that rotates the pair of arm members so that the closing free roller group is positioned at a closing position and an opening position of the opening.

4. The residual spray material removing apparatus according to claim 2,

the rotation drive mechanism includes:

5. The residual spray material removing apparatus according to claim 3,

the rotation driving device is provided with two sets of the pair of arm members, the plurality of free rollers for blocking constitute a part of the free roller set for blocking, the plurality of free rollers for blocking of the part are freely rotatably arranged on one set of the pair of arm members, and the plurality of free rollers for blocking constituting the other part of the free roller set for blocking are freely rotatably arranged on the other set of the pair of arm members, and the rotation driving device applies rotation to each set of the pair of arm members so that the free rollers for blocking arranged on each set of the pair of arm members are positioned at a blocking position and an opening position of the opening.

6. The residual spray material removing apparatus according to claim 4,

the rotation driving device is an air cylinder.

7. The residual spray material removing apparatus according to claim 5 or 6,

the rotation driving device is a cylinder that rotates together with the housing portion, and an air universal joint is used in an air supply/exhaust passage leading to the cylinder, and the air universal joint includes:

a 1 st air hole, the 1 st air hole opening on an outer peripheral surface of the driven shaft;

an air passage which is inserted through the central axis of the driven shaft and is connected to the 1 st air hole;

a fixed sleeve inserted into an end of the driven shaft and locked;

a circumferential groove provided around an outer circumferential surface of an end portion of the driven shaft in sliding contact with an inner circumferential surface of the fixed sleeve;

a 2 nd air hole, the 2 nd air hole being opened in the circumferential groove and connected to the air passage; and

and the air supply and discharge port is formed on the fixed sleeve corresponding to the circumferential groove and supplies and discharges compressed air to the circumferential groove.

8. The residual spray material removing apparatus according to claim 6,

the cylinders are disposed at respective outer sides of the pair of plate bodies.

9. The residual spray material removing apparatus according to claim 7,

the cylinder is provided with a lock mechanism that holds the pair of arm members at predetermined positions when the supply of compressed air is stopped, and that can maintain the closing of the opening of the storage section by the closing free roller.

10. The residual spray material removing apparatus according to any one of claims 1 to 6,

a control unit is provided for controlling the drive motor.