JPS5946743B2 - shot blasting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shot blasting device for cleaning the casting surface of a casting product.

Various types of shot blasting devices have been proposed and put into practical use depending on the shape, size, throughput, etc. of the work (casting product) to be shot blasted.

As a shot blasting device for hollow members, there is known a shot blasting device that includes a rotatable cage that receives a workpiece and is configured to rotate the cage and project a blasting material toward the workpiece inside the cage. .

In the above-mentioned shot blasting equipment, shot blasting is carried out while constantly removing the blasting material that has accumulated on the top surface or inside the workpiece and the casting sand that has adhered to the workpiece.
The cleaning efficiency is relatively good, but it is better to have a dedicated cage for each workpiece to prevent workpieces from getting caught when loading or unloading them from the cage or from flying out while the cage is rotating. This is common, and therefore requires a cage exchange device and a cage stock device, which increases the size and complexity of the equipment.

Moreover, since the products received inside the cage move freely within the cage while the cage is rotating, there is a risk that the workpieces will be damaged during the work, and the noise is also large.

The present invention particularly relates to a new shot blasting device for shot blasting hollow parts, and more specifically, it is an object of the present invention to provide a labor-saving shot blasting device that does not require a cage and includes automatic workpiece conveyance means. It is something to do.

The shot blasting apparatus according to the present invention includes: a cabinet; a plurality of workpiece holding means arranged in an array and spaced apart from each other in the cabinet, each holding a workpiece in a removable manner and rotatable about its own axis; A workpiece is supplied from outside the cabinet to one of the plurality of workpiece holding means in an aligned state at one end, and the workpiece is taken out of the cabinet from one at the other end, and the workpiece holding means are adjacent to each other. a conveyance means for transferring the workpiece from the one end side to the other end side in between;
The present invention is characterized by comprising a projection means for projecting a projection material onto the workpiece held by the workpiece holding means.

The invention will now be described in detail by way of example embodiments with reference to the accompanying drawings.

Fig. 1 is a side view showing one embodiment of the shot blasting device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a plan view thereof, and Fig. 4 is a front view thereof. .

In the figure, reference numeral 1 designates a cabinet, which has a workpiece inlet 2a at one end and a workpiece outlet 2b at the other end.

Inside the cabinet 1, a plurality of workpiece holding means 31 to 36, six in this embodiment, are installed at the loading port 2a and the loading port 2b.
and spaced apart from each other and typically aligned.

The workpiece holding means is constituted by a pair of finger-type workpiece gripping devices 4 facing each other.

4 to 6 show one of the finger-type work gripping devices 4 in an enlarged cross-section.

The finger-type workpiece gripping device 4 includes a fixed finger 6 that is integral with a holder 5 and a movable finger 8 whose one end is pivotally supported on the holder 5 by a pivot shaft 7.

The holder 5 is fixed to one end of a cylindrical spindle 9.

The one end of the spindle 9 is inside the cabinet 1,
The other parts are outside the cabinet, and are kept substantially horizontal by bearings 12 and 13 provided on a frame 11 erected on the side wall of the cabinet 1 and a shelf board 10 extending outward from the side wall. It is rotatably supported around its own axis.

A rod 14 passes through the inner cylindrical portion of the spindle 9.

The rods 14 are movable in the axial direction relative to the spindle 9, but are connected to each other in the rotational direction so that they rotate together with the spindle 9.

One end of the rod 14 is located within the cabinet 1, and one end of a connecting arm 16 is pivotally supported on the one end by a pivot 15.

The connecting arm 16 is pivotally connected at its other end to the intermediate part of the movable finger 8 by a pivot 17 .

The spring receiver attached to the other end of the rod 14 is member 2.
A compression coil spring 18 installed between 1 and the other end of the spindle 9 applies a spring force to the left as seen in FIG. It is brought into a position where it abuts the surface 20.

In this state, the connecting arm 16 is in a position as shown in solid lines, bringing the movable finger 8 into the clamping position.

When the rod 14 moves to the right in the figure against the spring force of the spring 18, the connecting arm 16 moves toward the pivot 1 due to the movement.
5 in the counterclockwise direction in the figure, the movable finger 8 is rotated in the counterclockwise direction in the figure around the pivot shaft 7, and is brought to the unclamping position. There is.

A cart 22 is arranged on the shelf board 10. The trolley 22 is
As shown in FIGS. 1 to 3, wheels 23 are provided at both ends of the shelf board 10, and these wheels 23 roll on guide rails 24 provided at both ends of the shelf board 10. This allows the rod 14 to move in the axial direction.

A plurality of push plates 25 are provided on the trolley 22 so that the spring supports of each finger type work gripping device 4 are opposed to the member 21 .

In addition, the cylinder device 2 is attached to the shelf board 10 by a bracket 26.
7 is attached, and this cylinder device 27 is connected to a bracket 29 of the truck 22 through a piston rod 28, so as to drive the truck reciprocatingly in the axial direction of the rod 14.

Spindle 9 has sprockets 3 each having two rows of teeth.
0 is fixed.

The splines 9 that are adjacent to each other are drivingly connected to each other by endless chains 31 that are passed between the sprockets.

An electric motor 32 is provided on the cabinet 1, and a sprocket 34 is attached to an output shaft 33 of the electric motor 32.

Further, a shaft 36 is provided on the cabinet 1 and is rotatably supported by a bearing 35 and extends in the axial direction of the spindle 9.

A sprocket 37 is attached to the middle portion of the shaft 36, and an endless chain 38 is passed between the sprocket 37 and the sprocket 34.

Further, sprockets 40 are attached to both ends of the shaft 36, and an endless chain 41 is passed between the sprockets and the sprocket 31.

The rotational force of the electric motor 32 is transmitted to each spindle 9 via the chain transmission mechanism as described above, and each of the finger type work gripping devices 4 is driven to rotate around the axis of the spindle 9.

Below the finger-type workpiece gripping device 4 is the gripping device 4.
A lift par 42 is disposed that extends substantially horizontally in the alignment direction.

The lift par 42 is longer than the cabinet 1 so as to protrude to one side from the cabinet 1, and when it is in the retreated position as shown in the figure, it intersects with the workpiece carry-in conveyor 57 provided on the side of the carry-in entrance 2a. When in the forward position, which is moved to the left in FIG. 3 from the backward position, the workpiece unloading conveyor 58 provided on the side of the unloading port 2b
It is designed to intersect with

The lift pars 42 are each mounted on the upper end of a link 45 whose intermediate portion is pivotally supported by a shaft 44 in a bearing 43.

A stiffener 46 is attached to the upper end of the link 45,
This allows the lift par 42 to reciprocate in the axial direction while rolling the lever 46.

The links 45 are provided near both ends of the lift par 42, and the links 45 are pivotally connected to each other by a connecting link 47, forming a parallel link structure.

Further, the shaft 44 is drivingly connected to a piston rod 50 of a cylinder device 49 via a link 52, and is reciprocated by a predetermined rotation angle by the cylinder device 49.

A piston rod 54 of a cylinder device 53 is drivingly connected to the lift arm 42 by a bracket 55, and is reciprocated in the axial direction by the cylinder device.

Cylinder devices 48 and 53 are each pivotally mounted on brackets 48,56.

The bearing 43 and the brackets 56, 48 are each fixed to a fixing member not shown in the figure.

A projection device (impeller) 59 is provided on the cabinet 1 at a position corresponding to each of the workpiece holding means 32 to 35. It is designed to project projectile materials.

At the bottom of the cabinet 1 is a screw conveyor 60 for collecting the shot material and casting sand, and at one side of the cabinet 1 is a screw conveyor 60 for conveying the collected shot material and parts to a separator 61. A packet conveyor 62 is provided in each case.

The separator 61 is supported by the frame of the packet conveyor 62, and is configured to separate the shot material and the casting sand.

The projection material separated by the separator 61 is re-supplied to each of the projection devices 59 from the discharge port 63 via a conduit (not shown).

Next, the operation of the shot blasting apparatus constructed as described above will be explained.

When a workpiece is carried into the cabinet 1, as shown in the figure, the lift par 42 is in the descending and retracted position, the rotation of the spindle 9 is stopped, and the fixed fingers 6 of each finger type workpiece gripping device 4 are in the downward position. The piston rod 28 is moved to the forward position as shown by the imaginary line in FIG. /i: The rod 14 is moved forward to the right in the figure against the action of the spring 18, and the movable finger 8 is brought to the unclamped position as shown by the imaginary line.

In the above-mentioned state, first, the cylinder device 49 operates and its piston rod 50 moves forward.

This causes the link 45 to rotate in the clockwise direction as viewed in FIG. 3 about the shaft 44, and the lift par 42 is raised to its retracted position.

Then, the workpiece W at the carry-in standby position on the workpiece carry-in conveyor 57 and the workpiece W placed on the fixed finger 6 in the cabinet 1 are respectively lifted.

Next, in this state, the cylinder device 53 is driven, and its piston rod 54 moves forward.

As a result, the lift par 42 moves forward by a predetermined distance to the left as viewed in FIG.

As a result of this movement, the workpiece W, which was at the waiting position for carrying in the workpiece carrying-in conveyor 57, is carried into the cabinet 1 through the carrying-in port 2a and moved to a position corresponding to the workpiece holding means 31.
Further, the workpieces W that were in the workpiece holding means 31 to 35 are moved to positions corresponding to the adjacent workpiece holding means 3□ to 36, respectively, and the workpieces W that were in the position corresponding to the workpiece holding means 36 are transferred to the cabinet 1. The workpiece is discharged from the cabinet through the outlet 2b and brought to a position corresponding to the workpiece discharge conveyor 58.

Next, the cylinder device 49 reverses and its piston rod 50 retreats, causing the link 45 to rotate in the counterclockwise direction as viewed in FIG. 3 about the shaft 44.

This causes the lift par 42 to descend at its forward position.

As a result, the workpiece W that has been in the carry-in standby position until now is placed on the fixed finger 6 of the finger-type workpiece gripping device 4 of the workpiece holding means 31, and
The work W held by ~35 is moved to the work holding means 3□ adjacent to the left side in the figure from each work holding means.
~3. The work W placed on the fixed fingers 6 of each finger type work gripping device 4 and held by the work holding means 36 is carried out onto the work carrying out conveyor 58.

Thereafter, the cylinder device 53 is reversely operated, its piston rod 54 is retracted, and the lift par 42 is returned to the retracted position.

When the workpiece conveyance process as described above is completed, the cylinder device 27 is reversely operated, and its piston rod 28 is retreated.

As a result, the truck 22 moves to the left as viewed in FIG. 4, and the push plate 25 and the spring receiver become separated from the member 21.

As a result, the rod 14 returns to the position as shown by the solid line in FIG. , comes to grip the workpiece W.

When gripping of the workpiece W is completed, the electric motor 32 is driven to rotate, and each of the spindles 9 is driven to rotate.

As a result, the workpieces W held by the workpiece holding means 3□ to 36 rotate around the axis of the spindle 9, respectively.

In this state, the projection device 59 operates and projects the projection material onto the rotating workpiece W.

The workpiece W held in the workpiece holding device 3□ is not sprayed with the projection material here, but the debris remaining inside the workpiece W is removed by rotation.

The workpiece W is sequentially held by the workpiece holding devices 32 to 35 and cleaned by projecting a shot material at each holding position, and is then held by the workpiece holding member 66 and when it rotates, the shot material remaining inside the workpiece W is cleaned. Materials, etc. are removed, and the cabinet 1 is then carried out.

Although the present invention has been described in detail with respect to specific embodiments above, it will be appreciated by those skilled in the art that the present invention is not limited thereto and that various embodiments can be made within the scope of the present invention. It should be obvious.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the shot blasting device according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view thereof, and FIG. FIGS. 5 and 6 are enlarged longitudinal cross-sectional views showing one embodiment of the work holding device used, and are cross-sectional views taken along the lines ■--■ and ■--■ in FIG. 4, respectively. 1-cabinet, 2a-work inlet, 2b-work inlet, 31-36-work holding device, 4-finger type work gripping device, 5-holder, 6-fixed finger, 7-
Pivot, 8-movable finger, 9-spindle, 10-shelf board, 11-frame, 12.13-bearing, 14-rondo,
15 - pivot, 16 - connecting arm, 11 - pivot, 18 - spring, 19 - annular flange, 20 - tip surface, 21 - spring receiver is a member, 22 - trolley, 23 - wheel, 24 - guide rail, 25 - Push plate, 26 - bracket, 27 - cylinder device, 28 - piston rond, 29 - bracket, 30 -
Sprocket, 31 ~ endless chain, 32 ~ electric motor, 3
3~Output shaft, 34~Sprocket, 35~Bearing, 36~
Shaft, 37 - sprocket, 38 - chain, 40 - sprocket, 41 - endless chain, 42 - lift bar, 4
3~Bearing, 44~Shaft, 45~Link, 46~Roller, 47
~Connection link, 48~Bracket, 49~West side striking device,
50-piston rond, 52-link, 53-cylinder device, 54-piston rond, 55-bracket, 56
- Bracket, 57 - Workpiece carry-in conveyor, 58 - Workpiece carryout conveyor, 59 - Projection device, 60 - Screw conveyor, 61 - Separator, 62 - Packet conveyor,
63~Exhaust port.

Claims (1)

[Scope of Claims] 1. A cabinet, a plurality of workpiece holding means arranged in an array and spaced apart from each other in the cabinet, each holding a workpiece in a removable manner and rotatable around its own axis; A workpiece is supplied from outside the cabinet to one of the plurality of workpiece holding means in an aligned state at one end, and the workpiece is taken out of the cabinet from one at the other end, and the workpiece holding means are adjacent to each other. A transport means for transferring the workpiece from the one end side to the other end side in between, and a projection means for projecting a projection material onto the workpiece held by the workpiece holding means. A shot blasting device characterized by: 2. In the shot blasting apparatus set forth in claim 1, the workpiece holding means is constituted by a pair of finger-type workpiece gripping devices facing each other, and the pair of finger-type workpiece gripping devices A shot blasting device characterized by being configured to grip both ends of a workpiece. 3. In the shot blasting apparatus according to claim 1 or 2, the conveyance means includes a lift bar extending in the alignment direction of the workpiece holding means, and means for vertically moving the lift bar. , means for moving the lift bar back and forth. 4. In the shot blasting device according to any one of claims 1 to 3, the projection means is a plurality of workpiece holding means other than those at both ends of the plurality of workpiece holding means in the aligned state. A shot blasting device characterized in that it is configured to project a blasting material onto a workpiece held by a workpiece holding means. 5. The shot blasting device according to any one of claims 1 to 4, wherein the projection means is separately provided corresponding to the workpiece holding means. Device.