JP4614591B2 - Solidified product manufacturing equipment for grinding sludge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention relates to a grinding sludge generated in a grinding line for hardened parts, for example, iron-based components such as inner and outer rings of rolling bearings, rolling elements, and other grinding steel sludges for other bearing steel materials. It relates to a manufacturing apparatus.
[0002]
[Prior art and problems to be solved by the invention]
Iron-based components such as inner and outer rings of rolling bearings and rolling elements are ground on the rolling surfaces after quenching. Powdered grinding waste generated by grinding flows out as a sludge to the outside of the machine and is discharged, and after filtration, the coolant is reused for grinding. The grinding sludge remaining after filtration is landfilled as sludge.
However, it is clear that landfilling of grinding sludge is not preferable from the viewpoint of the environment, and that landfill processing will not be possible in the future due to the dead end of the industrial waste treatment plant. The amount of grinding waste generated by grinding is smaller than that of cutting or the like, but in a mass production line such as a bearing, the amount generated is large.
[0003]
For this reason, the grinding sludge is solidified by squeezing and the squeezed coolant is reused, and the solidified product (hereinafter referred to as “briquette”) is being reused as a steel product.
Since the grinding sludge has a high coolant content and cannot be solidified directly, the grinding sludge containing coolant is filtered to form a concentrated sludge, and this concentrated sludge is solidified by a solidified product manufacturing apparatus.
[0004]
The solidified material manufacturing apparatus for fixing the grinding sludge is roughly classified into the following two types: a gate system and a double cylinder system.
As shown in FIG. 8, the gate system includes a cylindrical mold 81 for inserting grinding sludge, a gate 82 for closing one end of the cylindrical mold 81, and one pressurizing insert inserted from the other end. A piston 83. By pressurizing the piston 83 with the pressurizing cylinder 85, the grinding sludge is squeezed in the cylindrical mold 81 and solidified to form a briquette B.
As shown in FIG. 9, the double cylinder system includes a pair of pressurizing pistons 92 and 93 that are inserted into a cylindrical mold 91 so as to be capable of moving forward and backward. Both pistons 92 and 93 are for sub pressurization and main pressurization, respectively, and are pressurized by a sub pressurization cylinder 94 and a main pressurization cylinder 95. The sub-pressurizing piston 92 maintains a fixed position during squeezing and is driven forward and backward for discharging the manufactured briquette B.
[0005]
The advantages and disadvantages of the above two methods are summarized as follows.
(1) Gate system (FIG. 8).
-Advantages: Machines can be made smaller and cheaper.
Disadvantages: Since it is difficult to seal the slide of the gate 82, grinding sludge easily enters and wears, and is not suitable for long-term stable operation.
(2) Double cylinder system (Fig. 9)
Advantages: Since the sub-piston 92 is sealed on the discharge side, grinding sludge does not enter and stable operation is possible for a long time.
Disadvantages: Not only the machine becomes large, but also the machine becomes expensive because it includes a set of two large cylinders 94 and 95 and its hydraulic unit.
[0006]
In addition, any of the above methods has a problem in terms of processing capability. When the grinding sludge is solidified, the processing capacity of the solidified material manufacturing apparatus is determined by how quickly the coolant (water-soluble and oily) contained in the grinding sludge is discharged.
The ordinary solidified product manufacturing apparatus is basically structured to discharge the coolant from the gap between the cylindrical mold 91 and the pistons 92 and 93 as explained in the example of FIG. It takes. Therefore, in order to discharge the coolant more quickly, a structure has been adopted in which a large number of small holes (φ1 to 2 mm) (not shown) are provided in the pistons 92 and 93 and the coolant is discharged from there. Things have been proposed.
[0007]
However, the structure in which the small holes are formed in the pistons 92 and 93 has a drawback that fine grinding scraps are easily clogged, and a stable solidification process cannot be performed, which is not practical. It is considered that the reason why the small punch holes are easily clogged is that, in addition to being thin and long, the processed surface is rough and the flow is poor because of only the drilling.
Furthermore, in the case of water-soluble grinding sludge, the lubricity of the grinding sludge is low, so fine grinding debris cannot be discharged smoothly and easily clogged. Small holes are blocked by grinding debris that dries in time. For this reason, it is difficult to stably exhibit the function of a small hole unless it is frequently cleaned.
[0008]
An object of the present invention is to provide an apparatus for producing a solidified product of a grinding sludge that can be stably operated for a long period of time without causing any trouble on the seal, and can be reduced in size and cost with a simple configuration.
Another object of the present invention is to make it easy to discharge the coolant, have an excellent processing capability, and do not cause clogging of the coolant discharge path, enabling stable operation for a long period of time.
[0009]
[Means for Solving the Problems]
The solidified sludge manufacturing apparatus for grinding sludge according to the present invention includes a cylindrical mold in which concentrated sludge formed by filtering coolant-containing grinding sludge generated in a grinding line for quenched parts is disposed horizontally, and the cylindrical mold. In a solidified product manufacturing apparatus for grinding sludge, which is inserted into a press portion including a pair of pistons that are inserted so as to be capable of advancing and retreating in a solid, and solidified by pressing to produce a solidified product,
A spacer interposed between the support member and the back surface of the piston is disposed on the back surface side of the first piston of the first piston and the second piston, and the spacer is disposed at the back surface of the piston. When the concentrated sludge is squeezed, a load applied to the first piston is loaded by the spacer by enabling movement between the intermediate position and a standby position deviating from the intervening position. .
According to this structure, the concentrated sludge put into the cylindrical mold is squeezed between the first and second pistons to be a solidified product. At this time, the load applied to the first piston is applied to the spacer between the first piston and the support member. For this reason, the driving source for advancing and retracting the first piston does not require a pressing force for squeezing, and may simply be capable of moving back and forth in the cylindrical mold for discharging the solidified material. For this reason, the machine can be made small and inexpensive while having two pistons. In addition, when the first piston is hydraulically driven, a large hydraulic tank is not required, and this can also reduce the size and cost of the machine. In addition, since a pair of pistons are inserted into a cylindrical mold, there is no sliding part for grinding sludge to enter as in the conventional gate system, there is no trouble on the seal, and stable operation for a long time. Can be done.
[0010]
In the present invention, a vertical cylinder device that moves the spacer back and forth between the interposition position and the standby position may be installed.
Thus, by moving the spacer forward and backward with the cylinder device, the spacer can be advanced and retracted with a simple configuration. The cylinder device need only be capable of moving the spacer back and forth, and does not require a large output. Therefore, even if this cylinder device is added to the drive source of the first piston, it can be reduced in size and cost as compared with a case where the drive source of the first piston has a high pressurization force necessary for squeezing. Further, since the cylinder device is installed in a vertical shape, the spacer can be waited upward, and an increase in the floor area can be avoided in order to secure the standby position of the spacer.
[0011]
  An annular slit is provided on the mutually opposing surfaces of the first piston and the second piston, and the slit and the coolant discharge passage provided in each piston are communicated with each other. So as to discharge from the coolant discharge passageTo do.
  In the case of this configuration, the coolant squeezed from the concentrated sludge at the time of squeezing is discharged through a slit provided on the opposing surface of each piston, in addition to the gap between the cylindrical mold and each piston. For this reason, the coolant is quickly discharged, and the processing capability of the solidified product manufacturing apparatus is increased. In addition, since the annular slit is used, the cross-sectional area of the discharge path can be increased compared to the case where a small punch hole is provided, clogging is less likely to occur, and the coolant can be discharged more quickly. If it is an annular slit, it is easy to smoothly form the inner surface of the flow path, for example, by performing grinding or lapping, and this also makes it difficult to clog. Therefore, the coolant is easily discharged, the processing capacity is excellent, the coolant discharge path is not clogged, and stable operation can be performed for a long time. The annular slit can be circular, for example.
[0012]
  When the annular slit is provided, the first and second pistons are each composed of a shaft portion and a cylindrical portion that are loosely fitted to each other.2The radial gap between the shaft portion and the cylindrical portion isTo do. The shaft portion is a stepped shaft shape having a large diameter on the base end side, and the large diameter portion is closely fitted to the base end inner diameter surface of the cylindrical portion.
  In this way, the piston is divided into a plurality of members, and the radial gap between the shaft portion and the cylindrical portion is the annular slit, so that the annular slit can be easily formed. It is easy to smoothly process the inner surface, and clogging is less likely to occur.
[0013]
  In addition, as described above, the piston part is composed of a shaft part and a cylindrical part that are loosely fitted together.2Formed with one memberAlthoughThe shaft portion of the first piston may be movable back and forth with respect to the cylindrical portion.Yes. In this case, you may provide the axial part drive means to advance / retreat the axial part of the said 1st piston with respect to a cylinder part.
  In the case of this structure, the fine grinding | polishing waste which penetrate | invaded in the slit can be cleaned by advancing and retracting the axial part of a piston with respect to a cylinder part. For this reason, a coolant discharge gap is always ensured, and stable coolant discharge becomes possible.
[0014]
In the case of each of the configurations in the present invention, the quenched component may be an iron-based component of a rolling bearing. The iron-based component is, for example, an inner ring, an outer ring, or a rolling element.
In the grinding process of the components of the rolling bearing, oil-based coolant is often used, and grinding sludge is hard and fine, resulting in grinding sludge that is difficult to solidify. However, the grinding scrap is a grinding scrap such as high-quality bearing steel, and is generally mass-produced, so that it becomes a grinding sludge having a stable component. Therefore, when this is solidified, a high-quality solidified product is obtained as a steelmaking material. Moreover, it is easy to set the conditions for pressing for solidification, and solidification can be performed stably by setting appropriate conditions.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a concept of a processing method and a processing apparatus for grinding sludge including the solidified product manufacturing apparatus. In the grinding line 1, grinding is performed by the grinding machine 2 using the coolant supplied from the coolant tank 3. The grinding sludge composed of grinding waste and coolant generated in the grinding machine 2 is filtered by the filtering means 4, and the concentrated sludge generated by the filtration is solidified by squeezing by the solidified product producing apparatus 5 of this embodiment to be a solidified product. Let it be briquette B. The solidifying device 6 is configured by the filtering means 4 and the solidified material manufacturing device 5. The filtering means 4 is constituted by, for example, a precipitation facility and a filter facility that filters the ground sludge precipitated by the precipitation facility using a filter. The coolant generated by the filtration by the filtering means 4 and the coolant generated by the squeezing by the solidified material manufacturing apparatus 5 are returned to the coolant tank 3 of the grinding line 1 by the recovery paths 7 and 8, respectively. From the collection paths 7 and 8, the coolant is returned to the coolant tank 3 through a filter and a pump. Further, coolant is supplied from the coolant tank 3 to the grinding machine 2 through a filter and a pump. The briquette B solidified by the solidified product manufacturing apparatus 5 is transported to the steel maker 9 and used as a steel material by the steel maker 9. A plurality of briquettes B are carried in a transport container 10 called a flexible container bag or the like as shown in FIG. In the steel manufacturer 9, the briquette B is used as a steel material in the arc furnace 11 or the like. The steel material made of steel is used as a material for an object to be ground.
[0016]
An object to be ground to be ground in the grinding line 1 is a hardened part, and is a bearing steel material such as bearing steel. For example, the quenched part is an iron-based component of a rolling bearing, specifically, a race ring such as an inner ring or an outer ring, or a rolling element such as a ball. Oil-based coolant is used as the coolant for grinding. Examples of the steel for bearing include a high quenching material of high carbon chrome steel (SUJ2 etc.), an induction hardening material of medium carbon steel (S53C etc.), and a carburizing quenching material of case hardening steel (SCR415 etc.).
The grinding sludge generated in the grinding machine 2 is a fluid having a coolant amount of 90 wt% or more, and the rest is powdery grinding dust and a small amount of grinding abrasive grains. Grinding scrap generally has a curled short linear shape. This ground sludge contains substantially half of the coolant in the state of the concentrated sludge filtered by the filtering means 4. The components of the concentrated sludge are, for example, a very small amount of grinding abrasive grains such as grinding scraps made of bearing steel and the like and approximately 50 wt% of coolant and approximately 50 wt% of coolant.
The component of the briquette B is a steel material mostly composed of grinding scraps, the amount of coolant is 5 to 10 wt%, and contains a very small amount of abrasive grains remaining after the majority of the coolant is discharged together with the coolant during the solidification process. Even if the briquette B contains a very small amount of grinding abrasive grains, if the grinding scrap is a high-quality steel material such as bearing steel, there is no problem in its use as a steel-making material. The briquette B has a predetermined strength, for example, a strength such that even if it is dropped from a height of 1 m, there are no more than three pieces. Note that the briquette B does not contain any binder (cutting chips or the like) for solidifying grinding scraps.
[0017]
As shown in FIG. 2, the solidified product manufacturing apparatus 5 is pressed by a cylindrical mold 20 and first and second pistons 21 and 22 that are inserted into the cylindrical mold 20 so as to be capable of moving forward and backward. The part 23 is configured. The cylindrical mold 20 is horizontally installed on a base 24, and the advancing and retracting drive means 25 and 26 for the first and second pistons 21 and 22 are installed on the base 24. These advance / retreat drive means 25 and 26 are composed of hydraulic cylinder devices.
[0018]
The first piston 21 is a semi-fixed one that is used in a fixed position during squeezing. In order to discharge the solidified briquette B from one end of the cylindrical mold 20, the first piston 21 is entirely removed from the cylindrical mold 20. It is possible to advance and retreat between the position where it comes out and the stop position (shown position) at the time of pressing. The second piston 22 is for pressurization, and the concentrated sludge in the cylindrical mold 20 is squeezed by its advance. Therefore, as the advancing / retreating drive means 26 of the second piston 22, one having an output necessary for pressing is used. The cylindrical mold 20 has an inlet 27 for concentrated sludge on the peripheral wall. The second piston 22 can be moved backward from the insertion port 27, and the front surface of the piston, which is a pressure surface, moves forward from the insertion port 27 during pressing. The piston rod 34 of the second piston 22 is formed with a smaller diameter than the piston 22.
[0019]
A spacer 28 is disposed on the back side of the first piston 21. The spacer 28 is interposed between the fixed support member 29 and the back surface of the piston 21. The spacer 28 is movable between a position P1 (position shown in FIG. 2) interposed on the back surface of the piston 21 and a standby position deviating from the interposed position P1. The support member 29 is a member fixedly installed on the base 24, and also serves as a frame for installing the advance / retreat driving means 25 of the first piston 21.
[0020]
As shown in a plan view in FIG. 3, the first piston 21 is provided on the front surface of the piston mounting member 30. The forward / backward drive means 25 of the first piston 21 is composed of two cylinder devices 31, and a piston mounting member 30 is coupled to the piston rod 31 a of both cylinder devices 31. Both cylinder devices 31 are disposed on the left and right sides of the support member 29. The piston mounting member 30 is installed so as to be able to advance and retract through a guide means (not shown) such as a guide rod. This guide means is installed on the base 24 or the support member 29.
[0021]
The spacer 28 is coupled to the piston rod 32a (FIG. 2) of the cylinder device 32, and is advanced and retracted between the interposed position P1 and the standby position P2 (FIG. 4) by the cylinder device 32. The standby position P2 is set above the intervening position P1, as indicated by a solid line in FIG. The cylinder device 32 is fixedly installed on a fixed frame 33, and the fixed frame 33 is provided on the support member 29. The driving means for moving the spacer 28 back and forth between the intervening position P1 and the standby position P2 does not necessarily have to be the cylinder device 32. For example, an electric motor may be used as a driving source.
[0022]
The operation of the above configuration will be described. In FIG. 2, the first piston 21 is advanced to a predetermined position (illustrated position) in the cylindrical mold 20, and a spacer 28 is interposed between the back surface of the first piston 21 and the support member 29. . The concentrated sludge is charged into the cylindrical mold 20 through the charging port 27 in a state where the second piston 22 is retracted from the charging port 27. Thereafter, the second piston 21 is advanced by the advancing / retreating driving means 26, and the concentrated sludge in the cylindrical mold 20 is squeezed by the applied pressure. At this time, the load acting on the first piston 21 due to pressurization is applied to the spacer 28 between the first piston 21 and the support member 29 and is received by the support member 29. In this way, the concentrated sludge is squeezed in the cylindrical mold 20 to be solidified by squeezing out the coolant to obtain a briquette B.
When solidification is completed, the spacer 28 is moved up to the standby position P2 (FIG. 4) by the cylinder device 32, and the first piston 21 is extracted from the cylindrical mold 20 by the advance / retreat driving means 25. As a result, the briquette B is pushed out by the second piston 22 from the end of the cylindrical mold 20 that has been opened. After the extrusion, the first piston 21 enters the cylindrical mold 20 for the next solidification, and the above operations are repeated.
[0023]
According to the solidified material manufacturing apparatus 5 having this configuration, since the pair of pistons 21 and 22 are inserted into the cylindrical mold 22, there is no slide portion into which grinding sludge enters as in the conventional gate system, and the seal The above troubles do not occur and stable operation can be performed for a long time. Further, since the first piston 21 is subjected to a load by the spacer 28 at the time of pressing, the advance / retreat driving means 25 of the first piston 21 does not require pressing force for pressing, and is simply for discharging the briquette B. In addition, it is sufficient to be able to insert and remove from the cylindrical mold 20. Therefore, the machine can be made small and inexpensive while having two pistons 21 and 22. In addition, a large hydraulic tank is not necessary for the hydraulic pressure supply of the cylinder device 29 serving as the advance / retreat driving means 25 of the first piston 21, which also reduces the size and cost of the machine.
[0024]
In the above embodiment, the first and second pistons 21 and 22 may be configured as shown in FIGS. 5 and 6, for example.
Each of the first piston 21 and the second piston 22 is provided with annular slits 35 and 36 on opposite surfaces thereof, and coolant discharge passages 37 and 36 provided in the slits 35 and 36 and the pistons 21 and 22, respectively. 38 is in communication with each other. Thereby, the coolant squeezed by pressing is discharged from the slits 35 and 36 to the outside of the cylindrical mold 20 through the coolant discharge passages 37 and 38. The coolant discharge passages 37 and 38 are formed by radial holes provided at one place or a plurality of places in the circumferential direction.
[0025]
  Each of the first and second pistons 21 and 22 is formed by two members including shaft portions 21a and 22a and tube portions 21b and 22b that are loosely fitted to each other, and the shaft portions 21a and 22a and the tube portions 21b and 22b. The slits 35 and 36 are the radial clearances betweenThe TheThe lits 35 and 36 are formed so that the clearance dimension of the back side portion gradually increases as it reaches the back side. The expansion of the gap dimension is formed by making the inner diameter surface of the cylindrical portions 21b and 22b into a tapered surface. Further, the pistons 21 and 22 are respectively formed with annular spaces 39 and 40 on the inner side of the slits 35 and 36, and the coolant discharge passages 37 and 38 penetrate from the annular spaces 39 and 40 to the outer diameter surface. Is provided.
[0026]
In the first piston 21, the shaft portion 21 a and the cylindrical portion 21 b are configured such that the axial load received from the front surface of the piston is supported by the back surface abutting against the piston mounting member 30.
In the second piston 22, the shaft portion 22 a and the tube portion 22 b are configured such that the axial load received from the piston front surface is supported by the back surface contacting the piston rod 34.
[0027]
Cleaning coolant supply means 41 and 42 are provided for the coolant discharge passages 37 and 38 of the first piston 21 and the second piston 22, respectively. The cleaning coolant supply means 41 for the first piston 21 supplies clean coolant for cleaning to a part of the coolant discharge passage 37 in the circumferential direction. The cleaning coolant supply means 42 for the second piston 22 is provided with a communication passage 46 that communicates from the center of the piston 22 to the annular space 40, and supplies clean coolant for cleaning from the communication passage 46. The cleaning coolant is supplied to the communication passage 46 from a supply passage 45 provided in the piston rod 34 in the axial direction.
[0028]
As shown in FIGS. 5 and 6, when the annular slits 35 and 36 are respectively provided on the opposed surfaces of the first and second pistons 21 and 22 and communicated with the coolant discharge passages 37 and 38, The coolant squeezed out from the concentrated sludge is discharged through slits 35 and 36 provided in the pistons 21 and 22 in addition to the gap between the cylindrical mold 20 and the pistons 21 and 22. For this reason, coolant is discharged quickly, and the processing capability of the solidified product manufacturing apparatus 5 is increased. Further, since the annular slits 35 and 36 are used, the cross-sectional area of the discharge path can be increased compared with the case where a small punch hole is provided, clogging is less likely to occur, and the coolant can be discharged more quickly.
If the annular slits 35 and 36 are used, it is easy to smoothly form the inner surface of the flow path, such as grinding or lapping, and this also makes clogging difficult. Therefore, the coolant is easily discharged, the processing capacity is excellent, the coolant discharge path is not clogged, and stable operation can be performed for a long time.
In addition, when the slits 35 and 36 are provided, when the first and second pistons 21 and 22 are formed of a plurality of members including the shaft portions 21a and 22a and the cylindrical portions 21b and 22b that are loosely fitted to each other, an annular shape is provided. The slits 35 and 36 can be easily formed, the inner surfaces of the slits 35 and 36 can be easily processed smoothly, and clogging is less likely to occur. With such a split structure, the slits 35 and 36 can be easily formed into a shape in which the gap extends to the back as shown in the figure, and by making such a slit shape, smoother coolant discharge can be achieved. It becomes possible.
When cleaning coolant supply means 41 and 42 are provided in addition to the annular slits 35 and 36, it is possible to clean the inside by always pouring clean grinding coolant and realize more stable coolant discharge. It is.
[0029]
FIG. 7 shows a modification of the first piston 21. FIG. 7A shows an AA cross section of FIG. The first piston 21A is formed by a shaft portion 21Aa and a cylindrical portion 21Ab that are loosely fitted to each other, and a radial gap between the shaft portion 21Aa and the cylindrical portion 21Ab is formed in an annular shape that opens on the opposing surface of the piston 21A. In addition to the configuration of the slit 35, the shaft portion 21Aa can be advanced and retracted with respect to the cylindrical portion 21Ab. The piston 21A is provided with a shaft portion advancing / retreating drive means 49 for moving the shaft portion 21Aa forward and backward with respect to the cylinder portion 21Ab. The shaft advancing / retreating drive means 49 is composed of a cylinder device such as a hydraulic cylinder, and is specifically installed on the piston mounting member 30.
The shaft portion 21Aa has a stepped shaft shape in which the distal end side becomes a small-diameter slit forming piston 53 and the proximal end side becomes a large-diameter cleaning piston portion 54, and between the slit-forming piston portion 53 and the inner diameter surface of the cylindrical portion 21Ab. A slit 35 is formed. The coolant discharge passage 37 is provided in the cylindrical portion 21Ab so as to penetrate from the proximal end of the slit forming piston portion 53 of the shaft portion 21Aa to the radially outer surface. The cylinder portion 21Ab has a split structure in which the tip end side member 55 and the base end side member 56 are split into two in the axial direction, and both members are coupled to each other by a fastener 50 such as a bolt. The coolant discharge path 37 is formed along the dividing surface of both the members 55 and 56. The cleaning piston portion 54, which is a large diameter portion, is slidably fitted to the inner diameter surface of the cylinder portion 21Ab. The inner diameter surface of the cylinder portion 21Ab has the shaft portion 21Aa at a position during normal use. A seal 57 such as an O-ring that is in close contact with the outer diameter surface is provided.
[0030]
When the first piston 21 is configured such that the shaft portion 21Aa and the cylindrical portion 21Ab can advance and retract in this way, fine grinding dust that has entered the slit 35 can be cleaned by the advancement and retraction. Further, in the case of the configuration shown in the figure, it is possible to forcibly discharge the fine grinding dust that has entered the slit 35 by the cleaning piston portion 54. For example, a solidification cycle of concentrated sludge, or an operation of moving the cleaning piston portion 54 forward at regular intervals is incorporated, and fine grinding debris that has entered the annular slit 35 is forcibly discharged, so that a coolant discharge gap is always provided. And stable coolant discharge can be performed.
[0031]
【The invention's effect】
  The solidified sludge manufacturing apparatus for grinding sludge according to the present invention includes a cylindrical mold in which concentrated sludge formed by filtering coolant-containing grinding sludge generated in a grinding line for quenched parts is disposed horizontally, and the cylindrical mold. In a solidified product manufacturing apparatus for grinding sludge, which is inserted into a press portion including a pair of pistons inserted so as to be capable of advancing and retracting inward and solidified by pressing to produce a solidified product, the first piston and the second piston A spacer interposed between the support member and the back surface of the piston is disposed on the back surface side of the first piston among the pistons of the pistons, and a position where the spacer is interposed on the back surface of the piston and a standby position that deviates from the interposed position. When the concentrated sludge is squeezed, the load applied to the first piston is loaded by the spacer. Therefore, not create an obstacle on the seal, a long period of time can have stable operation, and reduction in size, becomes cost reduction is possible with a simple configuration.
  An annular slit is provided on the mutually opposing surfaces of the first piston and the second piston, and the slit and the coolant discharge passage provided in each piston are communicated with each other. Was discharged through the coolant discharge passage fromForThe coolant is easy to be discharged, the processing capacity is excellent, the coolant discharge path is not clogged, and stable operation is possible for a long time.
[Brief description of the drawings]
FIG. 1A is a block diagram showing a conceptual configuration of a grinding sludge treatment process using a grinding sludge solidified product manufacturing apparatus according to an embodiment of the present invention, and FIG. 1B is an explanatory diagram of a use example of the briquette. It is.
FIG. 2 is a cross-sectional view of an apparatus for producing a solidified product of grinding sludge according to one embodiment of the present invention.
FIG. 3 is a partially broken plan view of the solidified product manufacturing apparatus.
4 is a view as seen from the direction of arrow IV in FIG.
FIGS. 5A and 5B are a partial cross-sectional view and a front view of a first piston in the solidified product manufacturing apparatus, respectively.
6A and 6B are a front view and a partial cross-sectional view, respectively, of a second piston in the solidified product manufacturing apparatus.
7A and 7B are a partial sectional view and a front view of a second piston according to another embodiment of the present invention, respectively.
FIG. 8 is a cross-sectional view of a conventional example.
FIG. 9 is a cross-sectional view of another conventional example.
[Explanation of symbols]
1 ... Grinding line
2 ... Grinding machine
4 ... Filtration means
5 ... Solidified product manufacturing equipment
20 ... Cylindrical mold
21, 21A ... first piston
21a ... Shaft
21b ... Tube portion
22 ... Second piston
22a ... Shaft
22b ... Cylinder part
23 ... Press club
25, 26 ... advance / retreat driving means
28 ... Spacer
29 ... Support member
35, 36 ... slit
37, 38 ... Coolant discharge passage
B ... Briquette (solidified product)

Claims (6)

Concentrated sludge formed by filtering coolant-containing grinding sludge generated in the grinding line for hardened parts is a horizontally disposed cylindrical mold and a pair inserted in the cylindrical mold so as to be capable of moving forward and backward. In a solidified product manufacturing apparatus for grinding sludge, which is inserted into a press part including a piston and solidified by pressing to produce a solidified product,
A spacer interposed between the support member and the back surface of the piston is disposed on the back surface side of the first piston of the first piston and the second piston, and the spacer is disposed at the back surface of the piston. by movable between a standby position out of the intervening position of Toko, when squeezing the concentrated sludge, a load applied to the first piston so as to load the spacer, the first An annular slit is provided on the mutually opposing surfaces of the piston and the second piston, the slit and the coolant discharge passage provided in each piston are communicated, and the coolant squeezed by squeezing is discharged from the slit to the coolant discharge passage. The first piston and the second piston are both two parts composed of a shaft part and a cylindrical part that are loosely fitted to each other. The radial gap between the shaft portion and the tube portion is formed as the slit, and the shaft portion is a stepped shaft shape having a large diameter on the base end side, and the base end of the tube portion at the large diameter portion. Solidified product manufacturing equipment for grinding sludge closely fitted to the inner diameter surface .   2. The apparatus for producing a solidified product of grinding sludge according to claim 1, wherein a vertical cylinder device for moving the spacer back and forth between the interposition position and the standby position is installed. The solidified product of the grinding sludge according to claim 1 or 2, wherein the inner surface of the slit between the shaft portion and the cylindrical portion in the first piston and the second piston is subjected to a smoothing process. apparatus. The grinding sludge solidified product manufacturing apparatus according to any one of claims 1 to 3, wherein the shaft portion of the first piston is movable forward and backward with respect to the cylindrical portion. The apparatus for producing a solidified product of a grinding sludge according to claim 4, further comprising a shaft drive means for moving the shaft of the first piston back and forth with respect to the tube.   6. The apparatus for producing a solidified product of grinding sludge according to claim 1, wherein the quenched part is an iron-based component of a rolling bearing.

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