JP2003136409A - Refrigeration deburring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigeration deburring device in which a work is prevented from being ejected from a space between a basket and a lid by fitting a fixed lid to a rotating basket, and the deburring operation such as reduction of the use of a cooling gas can be efficiently performed. SOLUTION: The refrigeration deburring device comprises a refrigeration chamber body, a rotatable basket stored in the refrigeration chamber, and a fixed lid to elastically urge the basket to a fixed part of the refrigeration chamber body via an urging mechanism, and the fixed lid has a sliding plate forming a slidable receiving surface tightly attached to an opening edge of the rotatable basket.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frozen deburring apparatus for crushing and removing burrs by blasting shot particles in a frozen state of a product with burrs, and more particularly to a lid structure of the frozen deburring apparatus. Is.

[0002]

2. Description of the Related Art Conventionally, a freezing deburring device is shown in FIGS.
(This drawing is of the present invention, but the external appearance is the same as that of the conventional one, so description will be given using these drawings.) As shown in FIG. The basket 2 is provided to be housed in the freezing chamber through the doorway 11. A large number of products with burrs, such as rubber O-rings, are put into the basket 2 and the basket 2 is kept at -15 ° C to -30 ° C. It is a device which is housed in the freezer compartment main body 1a, and the shot mechanism 3 projects plastic shot particles to crush and remove the frozen and solidified burr.

Here, the basket 2 in the freezer compartment main body 1a
As shown in FIG. 2, while rotating at a certain angle with respect to the vertical direction in the freezer compartment main body 1a, this stirs the product with burrs in the basket,
This is for facilitating the accumulation of the stirred product with burrs at certain places (Fig. 6). Then, by the shot mechanism 3, shot particles are projected toward a portion (hatched portion) where the product 8 with burrs is accumulated to remove burrs.

On the other hand, the basket 2 has a shot projection port 3
In order not to disturb the flow of shot grains from 1,
No lid is provided. However, if it is left as it is, due to the rotation of the basket and the wind pressure of the shot grain projection,
Since the product 8 with burrs may jump out of the basket, a net-like mesh basket 27 is provided inside the basket separately from the basket, and the product 8 with burrs is attached to the mesh basket 2.
Deburring is usually performed by throwing in and sealing in 7. That is, the mesh of the mesh basket 27 has a size that allows the shot particles to pass through but does not allow the product with burrs to pass. Even if the shot particles are projected from the outside of the mesh basket 27, the shot particles do not mesh. After passing, the burrs of the product 8 with burrs could be broken and removed.

[0005]

However, when shot particles are projected from the outside of the mesh basket 27, some of them pass through the mesh well and collide with the product with burrs in the basket. There is also one that loses energy before it reaches the product 8 with burrs by colliding with. That is, the efficiency is inevitably inferior to the case of directly projecting on the product with burrs. For example, the processing time required for the deburring process is 20 minutes without the mesh basket, but takes 80 minutes with the mesh basket, and a processing time loss of about 4 times was observed.

Therefore, it is conceivable to provide a lid separately from the basket 2. In that case, it is necessary to provide a gap between the basket 2 and the lid so that the basket 2 can rotate. The product jumps out from the gap,
The peeled burr may get caught. Further, the basket 2 is usually made of a metal mesh structure and is made lightweight so as not to be subjected to a rotational load. It does not rotate, such as moving. Therefore, even if a lid that covers the opening 21 of the basket 2 is provided, it is difficult to smoothly rotate and eliminate the gap between the basket and the fixed lid.

The present invention solves these problems, and eliminates the mesh basket in the basket and provides a fixed lid that eliminates the gap between the basket and the lid to reduce the amount of cooling gas used. An object of the present invention is to provide a frozen deburring device that can efficiently perform deburring processing.

[0008]

Means for Solving the Problems In order to solve the above problems, the present invention provides a freezer compartment body, a rotatable basket housed in the freezer compartment, and a product with burrs placed in the basket in the freezer compartment. A shot mechanism for projecting shot particles to remove burrs of a product with burrs from the product, and is closely arranged in the opening of the rotating basket and has a slide receiving surface with the opening edge of the opening. It is characterized by having a fixed lid.

The slide receiving surface of the fixed lid is a slide plate made of a low friction member.

Further, the fixed lid has a biasing mechanism for resiliently biasing the basket toward the opening edge of the basket.

Further, shot grains are projected onto the freezing chamber main body, a rotatable basket housed in the freezing chamber, and the product with burrs put in the basket in the freezing chamber to remove burrs from the product with burrs. And a shot mechanism, and a fixed lid is provided on the fixed portion of the freezer compartment main body via an urging mechanism including a spring or a cylinder for elastically urging the basket, and the fixed lid rotates. It is characterized in that it is provided with a sliding plate serving as a sliding receiving surface which is closely attached to the opening edge of the basket.

In addition, the opening edge of the basket has a wide cross-section toward the fixed lid, has a flat surface that comes into close contact with the fixed lid, and the corners on the outer diameter side and the inner diameter side are It is characterized by being chamfered.

[0013]

According to the freezing deburring apparatus of the present invention, since the fixed lid which is closely attached to the opening portion of the rotating basket and has the sliding receiving surface with the opening edge of the basket is provided, the fixed lid is provided between the basket and the fixed lid. You can eliminate the gap. Therefore,
The work does not jump out or get caught between the conventional basket and the fixed lid.

Further, since the sliding receiving surface of the fixed lid is a sliding plate made of a low friction member, an excessive load is not applied to the rotation of the basket, and even if the basket is worn, only the sliding plate can be replaced. Good maintenance, easy maintenance, and low cost.

Since the fixed lid is provided with an urging mechanism for elastically urging the basket side, even if the basket does not rotate accurately and swings, it follows the movement of the basket.
You can always eliminate the gap between the basket and the fixed lid.

Further, the opening edge of the basket is widened toward the fixed lid and provided with a flat surface which comes into close contact with the fixed lid, so that the rigidity of the mesh basket is increased, and the biasing force of the biasing mechanism is properly adjusted. Therefore, the followability to the swing of the basket can be reliably improved. Further, by rounding the corners of the opening edge, when the basket swings, there is no risk of damaging the sliding plate at the corners.

Further, it becomes easy to automate the loading / unloading of the product into / from the basket and the opening / closing of the upper lid of the basket, and the unmanned deburring process can be achieved.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. 1 and 2 show a freezing deburring device according to the present invention. The freezing deburring device comprises a freezing chamber 1 and
It is provided with a cylindrical basket 2 housed in the freezer compartment 1 and a shot mechanism 3 for projecting a large number of shot particles onto the basket 2 housed in the freezer compartment 1. The shot particles refer to small particles such as cylindrical plastic, other non-metals, and relatively soft metals.

The freezer compartment 1 has a freezer compartment main body 1a and a main body door 12 for closing the basket entrance 11 of the freezer compartment main body 1a, and a guide shaft is connected to the main body door 12 continuously.
The basket inlet / outlet 11 can be opened and closed by a reciprocating mechanism such as a cylinder.

The main body door 12 is provided with a horizontal shaft 12a, and the shaft member 12 is provided at the tip of the horizontal shaft 12a.
b is projected. Further, the basket 2 is held on the shaft member 12b. Where basket 2
Is rotatable about the axis of the shaft member 12b and rotatable about the axis of the horizontal shaft 12a.

That is, as shown in FIG. 1, a large number of products with burrs are loaded with the opening of the basket 2 facing upward in the vertical direction, and the basket 2 is placed in the freezer compartment main body 1a as shown in FIG. It is rotated around the horizontal shaft 12a and held at a predetermined angle with respect to the vertical direction, and the main body door 12 is slid to close the basket entrance / exit 11. In this state, as shown in FIG. 5, the basket 2 is rotated around the shaft member 12b, and the shot mechanism 3 projects a large number of shot particles (media) into the basket 2.

Next, the basket 2 shown in FIG. 3 showing the vicinity of the fixed lid 4 has a substantially cylindrical shape and is made of metal (SUS in the embodiment).
The material is in the form of a mesh, and the opening 21 does not have a lid and remains open so that the shot particles projected by the shot mechanism can be taken into the inside of the basket.

The opening edge 23 of the basket 2 is shown in FIG.
As shown in, the width of the basket 2 is widened toward the fixed lid 4 side with respect to the total thickness of the basket 2. The flat surface 24 that comes into contact with the fixed lid 4 comes into contact with the sliding plate 41, and is formed in an annular shape over the entire opening edge 23. Furthermore, the corners 2 on the inner diameter side and the outer diameter side of the opening edge 23
No. 5 has a round chamfer, and in this embodiment, the flat surface 24 has a width of 6 mm, and the round chamfer has R = 0.5 m.
It has become m. The radius of the round chamfer with respect to the flat surface 24 can be appropriately changed depending on the size of the basket 2.

The fixed lid 4 shown in FIG. 3 is attached to the fixed plate 43 provided in the freezer compartment body 1 via the biasing mechanism 5, and the opening edge 23 of the basket 2 is attached to the fixed lid 4. It abuts via the sliding plate 41. The fixed lid 4 is
It does not rotate together with the basket 2, and the rotating basket 2 is closely received by the slide receiving surface 42 of the slide plate 41.
This is to prevent the work in the basket 2 from popping out. A shot passage hole is provided near the center of the fixed lid 4 so that the shot grains of the shot mechanism 3 pass therethrough, but the work does not protrude from here. That is, even if the work is trying to come out from the hole of the fixed lid 4 due to the blowout of the shot particles, the shot particles are constantly projected and the work is pushed back into the basket again.

The sliding plate 41 attached to the fixed lid 4 has an annular shape so as to come into contact with the flat surface 24 of the opening edge 23 of the basket 2. Further, as the material of the sliding plate 41, since the fixed lid is stationary with respect to the rotating basket 2, it must be one having excellent wear resistance,
And since the temperature inside the basket 2 is -15 ° C to -35 ° C,
It is necessary to select a material that has excellent low-temperature characteristics. In this embodiment, a tetrafluoroethylene resin (PTFE) containing 15% graphite is used, and it is very wear resistant with the SUS material that is the material of the basket 2 under the above-mentioned low temperature use environment. found. As the base material of the sliding plate 41, for example, fluororesin or polyethylene which is a low friction material can be used, and as the filler, 15
% Graphite, glass fiber of about 15% to 25%, glass fiber 20% + graphite 5%,
Glass fiber 15% + molybdenum disulfide 5%, 25
% -35% carbon, 10% carbon fiber, and the like.

In the present embodiment, the urging mechanism 5 is a guide shaft 5.
It is configured by fitting a spring 51 into the second member 2.
From this, even if the rotation accuracy of the basket 2 is not good and the basket 2 swings to some extent, the swing of the basket 2 is followed by the spring 51, and the fixed lid 4 (sliding plate 41) and the opening edge 23 of the basket 2 are separated. There is no gap between them.
Further, even if the slide receiving surface 42 of the slide plate 41 is worn, the gap for the wear is filled up without mechanical alignment.
The gap can be filled only by adjusting the biasing force of the biasing mechanism 5.

The fixed plate 41, the urging mechanism 5,
The sliding plate 4 has an integral structure (hereinafter referred to as a lid structure) and is movable integrally with the basket 2 in the rotation axis direction of the basket 2.

Next, a method for crushing and removing the burrs of the product with burrs from the product by the freezing deburring apparatus configured as described above will be described. First, as shown in FIG. 1, the basket 2 is withdrawn from the freezer compartment 1, and a large number of products with burrs are loaded with the basket opening facing upward in the vertical direction. Next, the basket 2 is allowed to enter the freezer compartment main body 1a filled with cooling nitrogen gas or the like as it is, and the basket door 11 is closed by the main body door 12. At this time, the temperature in the freezer compartment main body 1a is generally about -15 ° C.
It is -35 degreeC.

Next, as shown in FIG. 2, the opening 21 of the basket 2 is held with the shot mechanism 3 tilted at a predetermined angle with respect to the vertical direction, and then shown in FIG. 3 (b). As described above, the above-mentioned lid structure moves toward the basket 2, the flat surface 24 of the basket 2 contacts the sliding plate 41,
Further, by moving to the basket 2 side, the spring of the urging mechanism 5 contracts, the fixed lid 4 is elastically urged by the basket 2, and the fixed lid 4 and the basket 2 are brought into close contact with each other to be closed.

Then, when the basket 2 is rotated, the flat surface 24 of the opening edge 23 of the basket 2 is brought into sliding contact with the sliding plate 41 provided on the stationary lid 4 which is stationary in the closed state. At this time, even if the rotation of the basket 2 becomes unstable, the biasing mechanism 5 causes the fixed lid 4 to follow the movement of the basket 2 (does not rotate), and a gap is formed between the fixed lid 4 and the basket 2. There is nothing you can do. The product with burrs in the basket 2 is continuously stirred by the rotation of the basket 2. Then, in this state, the cooling gas (not shown) is continuously injected, and the shot mechanism 3 projects the shot particles toward the accumulating portion 81 of the product 8 with burrs. The burr that has collided and solidified by freezing can be crushed, and the burr of the product 8 with burrs can be removed.

The shot particles projected into the basket 2 and the crushed burr are discharged through a discharge port provided on the bottom surface of the basket 2 and shot particles sucked by a suction mechanism (not shown). After separating the burr, only shot particles can be supplied to the shot mechanism 3 again.

Although one embodiment has been described above, the design can be changed without departing from the gist of the present invention. For example, as the biasing mechanism, a spring is used in the embodiment, but a cylinder or the like can be used. That is, there is no particular limitation as long as it has a shock absorber-like mechanism.

Further, the shot projection port 3 of the shot mechanism 3
As shown in FIG. 6, the projection may be performed in parallel with the rotation axis of the basket 2 as shown in FIG. 6, but as shown in FIG.
The shot grain passing hole 26 for projecting shot grains is provided by combining the shot projecting port 44 on the extension of the rotation axis and projecting toward the accumulating portion 81 of the work.
Since it can be made smaller, it is possible to more effectively prevent the work piece from popping out.

[0034]

As described above, the extrusion molding apparatus of the present invention has the following great effects. Since it is possible to provide the lid for suppressing the protrusion of the work, it is not necessary to provide a mesh basket, and it is possible to directly project the shot grains onto the product with burrs without reducing the efficiency of the shot grains. Therefore, the processing time for deburring can be shortened and the consumption of cooling gas can be saved. Further, automation of the freezing deburring device is facilitated, and the efficiency of the deburring process is improved. Since the fixed lid is provided with a shock absorber-like biasing mechanism, the fixed lid can be followed even if the basket does not rotate accurately. Therefore, the gap between the basket and the fixed lid can be eliminated, and the work can be completely prevented from jumping out or being caught. Since the sliding surface of the fixed lid that the basket abuts is equipped with a sliding plate that is separate from the fixed lid, even if extreme wear occurs due to long-term use, the fixed lid does not need to be replaced and slides. Only the board needs to be replaced. Therefore, the maintenance can be facilitated and the maintenance cost can be suppressed.

[Brief description of drawings]

FIG. 1 is a diagram showing an appearance of a frozen deburring device of the present invention.

FIG. 2 is a view showing the external appearance of the frozen deburring device of the present invention.

FIG. 3 is a diagram showing the vicinity of a fixed lid.

FIG. 4 is a view showing an opening edge of a basket.

FIG. 5 is a view showing a frozen deburring device of the present invention.

FIG. 6 is a diagram showing a conventional shot grain flow.

[Explanation of symbols]

1 freezer compartment, 1a freezer compartment main body, 2 baskets, 3 shot mechanism, 4 fixed lid, 5 biasing mechanism, 8 burr product, 21 opening, 23 opening edge, 24 flat surface, 25 corner, 26 shot grain passage Hole, 27 mesh basket, 41 sliding plate, 42 sliding receiving surface, 43 fixing plate, 51 spring, 52 guide shaft, 31
Shot projection port, 81 stacking unit

Claims (5)

[Claims] 1. A freezing chamber main body, a rotatable basket housed in the freezing chamber, and shot particles are projected on the product with burrs put in the basket in the freezing chamber to remove burrs of the product with burrs from the product. A freezing deburring apparatus comprising: a shot mechanism for causing the rotation of the basket, and a fixed lid which is disposed in close contact with the opening of the rotating basket and has a slide receiving surface with the opening edge of the opening. 2. The freezing deburring device according to claim 1, wherein the sliding receiving surface of the fixed lid is a sliding plate made of a low friction member. 3. The freezing deburring apparatus according to claim 1, wherein the fixed lid has a biasing mechanism that resiliently biases the basket toward the opening edge of the basket. 4. A freezing chamber main body, a rotatable basket housed in the freezing chamber, and shot particles are projected onto the product with burrs placed in the basket in the freezing chamber to remove burrs from the product with burrs. And a shot mechanism, and a fixed lid is provided on the fixed portion of the freezer compartment main body via an urging mechanism including a spring or a cylinder for elastically urging the basket, and the fixed lid rotates. A freezing deburring device comprising a sliding plate serving as a sliding receiving surface that is in close contact with the opening edge of the basket. 5. The opening edge of the basket has a wide cross-section toward the fixed lid, has a flat surface that comes into close contact with the fixed lid, and the corners on the outer diameter side and the inner diameter side are A chamfered chamfered earring.
4. The frozen deburring device according to any one of 4 to 4.