CN215547210U - Freezing platform and machining equipment - Google Patents

Abstract

The utility model belongs to the technical field of machining and discloses a freezing platform and machining equipment. The freezing platform comprises a platform body and a pipeline, wherein the platform body is provided with more than two flow paths which are communicated along the length direction and/or the width direction of the platform body, and the flow paths are sequentially communicated through a transition piece fixed on the platform body, so that the freezing platform can circulate a refrigerant which is input and output through the pipeline to freeze and fix a blank placed on the platform body; the transition piece is a plug, and the plug is welded with the platform body; and the plugging side of each plug is respectively butted with two adjacent flow paths in the flow path of the refrigerant. The machining apparatus includes a refrigerated platform as described above. The freezing platform provided by the utility model has good flow path sealing performance and large heat exchange area with a refrigerant, and can fix large-size blanks. The machining equipment can process large-size blanks in a freezing and fixing mode, and the machining precision is high.

Description

Freezing platform and machining equipment

Technical Field

The utility model relates to the technical field of machining, in particular to a freezing platform and machining equipment.

Background

The freezing platform is a universal fixture for freezing and fixing the workpiece by using a freezing technology, and the blank is prevented from being fixed by adopting a clamping mode, so that the stress borne by the blank can be reduced, and the forming quality of the workpiece is improved. And because the blank is in a low-temperature state during freezing and fixing, cutting fluid can be omitted, the temperature rise of the cutter during machining can be reduced, and the service life of the cutter can be prolonged.

The existing freezing platform mostly adopts a semiconductor refrigerating sheet as a refrigerating element, has high refrigerating speed and can fix blanks in a short time. However, limited by the refrigeration principle and refrigeration power of the semiconductor refrigeration sheet, the type of refrigeration platform can only be suitable for processing thin-wall workpieces, that is, only can fix thin-wall blanks, and when processing other workpieces with slightly larger dimensions, the blanks cannot be reliably frozen and fixed, that is, cutting operation cannot be performed, or the blanks move due to fixation failure in the cutting operation process.

Therefore, patent document No. CN109176361A discloses a quick-freezing clamping device, which adopts a pipeline capable of circulating a refrigerant in a freezing platform, and cools the refrigerant by refrigerant circulation equipment to freeze and fix a blank placed on the freezing platform, and the pipeline is directly arranged on the freezing platform, so that an intermediate heat exchange conduction structure is reduced, and the quick-freezing clamping device adopts the refrigerant circulation equipment, and has a large refrigerating power. However, the ends of the pipelines arranged on the freezing platform of the quick-freezing clamping device are butted by adopting bent pipes screwed outside the freezing platform, so that the sealing performance is poor, and the debugging requirements of the problems such as refrigerant leakage and the like in service are high. And the bent pipes are limited by a reserved space necessary for installing the bent pipes on the freezing platform, and an enough space needs to be kept between the adjacent bent pipes, so that the number of pipelines which can be arranged on the freezing platform is correspondingly limited, the total heat exchange area of the freezing platform and a refrigerant is limited, and a large-size workpiece needs to be fixed by the aid of a vacuum adsorption tank.

Therefore, the above problems need to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a freezing platform and machining equipment.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a freezing platform comprises a platform body and a pipeline, wherein the platform body is provided with more than two flow paths which are communicated along the length direction and/or the width direction of the platform body, and the flow paths are sequentially communicated through a transition piece fixed on the platform body, so that a refrigerant which is input and output through the pipeline can flow through the freezing platform, and a blank placed on the platform body is frozen and fixed; the transition piece is a plug, and the plug is welded with the platform body; and the plugging side of each plug is respectively butted with two adjacent flow paths in the flow path of the refrigerant.

Preferably, the blocking side of each plug is provided with a transition groove which is concavely arranged towards the inside of the plug, and the transition groove is used for smoothly communicating two adjacent flow paths.

Preferably, the end face of the platform body, which is used for welding the plug, is concavely provided with a caulking groove which can be partially or completely embedded into the plug.

Preferably, two or more flow path layers are arranged in the height direction of the platform body, and each flow path layer comprises a plurality of parallel flow paths penetrating in the length or width direction of the platform body; and in the two adjacent flow path layers, the two adjacent flow paths in the flow path are communicated through the plugs.

Preferably, an inflow end of the flow path is positioned at an uppermost one of all the flow path layers; the outflow end of the flow path is located at the lowermost one of all the flow path layers.

Preferably, the inflow end of the flow path is located at a middle portion in a length or width direction of the platform body.

Preferably, the platform body is provided with two flow paths, and the two flow paths are symmetrically arranged on two sides of a median vertical plane in the length direction or the width direction of the platform body.

Preferably, the inflow ends of the two flow paths are arranged to intersect.

In order to achieve the purpose, the utility model also adopts the following technical scheme:

a machining apparatus comprising a freezing platform as described above and a cooling device for providing a cooling medium to the freezing platform.

Preferably, the refrigeration device includes a first refrigeration portion and a second refrigeration portion, both of which can provide a refrigerant to the freezing platform, wherein the refrigeration power of the first refrigeration portion is greater than the refrigeration power of the second refrigeration portion.

The utility model has the beneficial effects that:

according to the refrigeration platform provided by the utility model, the sealing performance of the flow paths can be ensured by welding plugs on the platform body to communicate with the flow paths, so that the leakage of a refrigerant is avoided. Meanwhile, the welding operation of the plugs and the platform body is hardly influenced by the position interference of other plugs welded on the platform body, the distance between adjacent flow paths on the freezing platform can be set to be smaller, and further more flow paths are allowed to be arranged on the platform body with the same volume, so that the total heat exchange area of a refrigerant and the platform body can be increased, the solidification rate of a freezing medium is improved, and the freezing platform can be used for fixing blanks with larger sizes.

The machining equipment provided by the utility model comprises the freezing platform, can process large-size blanks in a freezing and fixing mode, and is high in processing precision.

Drawings

Fig. 1 is a schematic structural view of a machining apparatus in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a configuration of a refrigerated platform in an embodiment of the present invention;

FIG. 3 is a schematic illustration of a refrigerated platform with the enclosure and shroud removed in an embodiment of the utility model;

FIG. 4 is an exploded view of the platform body and the plug in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a plug in an embodiment of the utility model;

FIG. 6 is one of the cross-sectional views of the platform body in an embodiment of the utility model;

FIG. 7 is a second cross-sectional view of the platen body in an embodiment of the present invention;

fig. 8 is a side view of a platform body in an embodiment of the utility model.

In the figure:

1. a cutting device;

2. a freezing platform; 21. a platform body; 211. a flow path; 212. chamfering; 213. caulking grooves; 214. equal-height blocks; 215. a transition path; 22. a pipeline; 23. enclosing plates; 24. a containing groove; 25. a plug; 251. plugging the surface; 252. a transition groove; 26. a housing;

3. a refrigeration device; 31. a first refrigerating section; 32. a second refrigerating section;

10. an inflow end; 20. an outflow end;

100. a blank;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Referring to fig. 1, the present embodiment provides a machining apparatus, which includes a cutting device 1, a freezing platform 2 and a refrigerating device 3. The freezing platform 2 can be used for accommodating a freezing medium which can be solidified after cooling, the freezing device is used for circularly providing a refrigerant for the freezing platform 2, so that the refrigerant and freezing heat exchange is realized by virtue of the freezing platform 2, then the freezing medium is frozen and solidified, and a blank 100 to be processed into a workpiece, which is placed on the platform body 21, is fixed on the bearing surface of the freezing platform 2.

Specifically, as shown in fig. 2, in the present embodiment, the freezing platform 2 includes a platform body 21 made of copper or other metal material with excellent heat conduction performance, a pipeline 22 for butting the freezing platform 2 and the external refrigeration device 3, a cover 26 disposed on the outer periphery of the platform body, and the like. The periphery of the bearing surface of the freezing platform 2 is provided with a surrounding plate 23 protruding upwards, so that the bearing surface of the freezing platform 2 and the surrounding plate 23 enclose to form a containing groove 24 capable of containing a liquid freezing medium. The platform body 21 has two or more flow paths 211 (see fig. 6 and 7) penetrating along the length and/or width direction thereof, and the flow paths 211 are sequentially communicated with each other by a transition piece fixed to the platform body 21, so that the freezing platform 2 can flow a refrigerant to freeze the blank 100 placed on the bearing surface of the platform body 21.

During the processing operation, the blank 100 may be placed on the carrying surface, and preferably, a weight is used to press the blank 100, then, a freezing medium is injected onto the freezing platform 2, the refrigerating device 3 is turned on, so that a low-temperature refrigerant circulates in the flow path 211 in the platform body 21, and the refrigerant exchanges heat with the freezing medium through conduction of the platform body 21, so as to solidify the freezing medium to fix the blank 100. After the freezing medium is solidified, the weight is removed, and the cutting device 1 performs a cutting operation on the blank 100. After the cutting of the blank 100 is completed, the freezing medium may be heated by infrared thermal irradiation, spraying water to the freezing platform 2, etc. to liquefy the freezing medium to release the fixation of the blank 100, i.e. the semi-finished product or the finished product workpiece, which is completed.

Preferably, the cooling device 3 can continuously work during the cutting operation of the blank 100 to continuously exchange heat with the freezing medium, so as to prevent the freezing medium from being heated and liquefied due to the cutting temperature rise of the blank 100. Further, as shown in fig. 1, in consideration of the problem of high energy consumption of the continuous operation of the refrigeration device 3, in the embodiment, the refrigeration device 3 preferably includes a first refrigeration part 31 and a second refrigeration part 32 both capable of providing a refrigerant to the freezing platform 2, wherein the refrigeration power of the first refrigeration part 31 is greater than that of the second refrigeration part 32, so as to achieve rapid cooling of the freezing platform 2 and the freezing medium by using the high-power first refrigeration part 31 in the process of solidifying the freezing medium, and to reduce the temperature of the freezing platform 2 and the freezing medium by using the low-power second refrigeration part 32 in the cutting operation of the blank 100, so as to maintain the solidification state of the freezing medium, thereby contributing to reducing the overall energy consumption of the refrigeration device 3.

During the cutting process, the blank 100 is directly placed on the bearing surface of the freezing platform 2, so the bearing surface of the freezing platform 2 is usually selected as a reference surface for the machining operation of the cutting equipment. The freezing medium is generally clean water, and since the volume of the water is expanded when the water is solidified from a liquid state, the liquid water remaining between the bearing surface and the bottom surface of the blank 100 is solidified and expanded to cause the blank 100 to be lifted, that is, a position deviation in height exists between the bottom surface of the blank 100 and the bearing surface, and the position deviation is finally reflected as a dimension deviation of a finished workpiece made of the blank 100.

To this end, referring to fig. 2 in combination with fig. 3, in the present embodiment, the carrying surface of the freezing platform 2 is preferably provided with an array of a plurality of equal-height blocks 214, so that when the blank 100 is placed on the freezing platform 2, the blank is actually placed on the top surface of each equal-height block 214, that is, there is a height difference with the carrying surface.

The above configuration also reduces the actual contact area between the workpiece and the freezing platform 2, and reduces the positional deviation of the blank 100 due to solidification and expansion of the freezing medium remaining in the contact portion between the workpiece and the freezing platform 2, thereby contributing to improvement of the processing accuracy of the workpiece. In addition, in the freezing process, the part of the bearing surface without the equal-height block 214 and the side wall of the equal-height block 214 can contact with the freezing medium for heat exchange, so the structure can be beneficial to improving the solidification rate of the freezing medium and shortening the processing period. Moreover, because there is a height difference between the blank 100 and the bearing surface, the freezing medium is allowed to flow between the equal-height blocks 214, which greatly increases the contact area between the freezing medium and the bottom surface of the blank 100 and improves the fixing effect of the freezing medium to the blank 100, compared with solidifying the freezing medium after directly pressing the blank 100 against the bearing surface.

Referring to fig. 3 and 4, in the present embodiment, the transition piece fixed on the platform body 21 and used for communicating each flow path 211 is a plug 25, the plugging side of each plug 25 is respectively abutted to two adjacent flow paths 211 along the flow path of the refrigerant, and the plug 25 is welded and fixed to the platform body 21. The plug 25 is preferably made of the same material as the platform body 21, and the welded plug 25 and the platform body 21 should avoid the occurrence of poor welding failure, sand hole and the like in the welded joint, so as to ensure that the pressure bearing capacity of the welded joint between the platform body 21 and the plug 25 is enough to allow the continuous circulation of the high-pressure refrigerant circulating in the flow path 211.

Compared with the mode that the bent pipes which are externally screwed are communicated with the flow paths 211, the sealing performance of the flow paths 211 can be ensured by welding the plugs 25 on the platform body 21 to be communicated with the flow paths 211, and the refrigerant is prevented from leaking. Meanwhile, under the condition of achieving the same purpose, the volume of the plug 25 is far smaller than the total volume of the elbow and the connecting pieces such as the nut matched with the elbow, and the plug 25 can be designed into a more regular shape, so that the welding operation of the plug 25 and the platform body 21 is hardly influenced by the position interference of other plugs 25 welded on the platform body 21, the distance between adjacent flow paths 211 on the freezing platform 2 can be set smaller, and further the platform body 21 with the same volume is allowed to be provided with more flow paths 211, that is, the total heat exchange area between the refrigerant and the platform body 21 can be increased, the solidification rate of the freezing medium is improved, and the blank 100 with a larger size can be fixed.

Specifically, the plug 25 has a plugging surface 251, the plugging surface 251 corresponds to two flow paths 211 to be connected, and after the plug 25 is welded to the platform body 21, a gap may be reserved between the plug 25 and the platform body 21 to communicate the two flow paths 211 through the gap. Of course, the gap may not be provided between the plug 25 and the platform body 21, and as shown in fig. 5, after the plugging surface 251 of the plug 25 abuts against the end surface of the platform body 21 where the two flow paths 211 are opened, the two adjacent flow paths 211 may be communicated with each other by the transition groove 252 recessed from the plugging surface 251 into the plug 25. In order to reduce the fluid pressure drop of the refrigerant, the cross section of the transition groove 252 is preferably semicircular to smoothly communicate the two adjacent flow paths 211.

As a further alternative, as shown in fig. 6 and 7, both ends of the solid portion of the platform body 21 between two adjacent flow paths 211, that is, the portion close to the plug 25, may be provided with chamfers 212, so that both ends of the solid portion present a semicircular cross-sectional structure, correspondingly, the transition groove 252 concavely provided on the plug 25 may be in an arc shape, and after the plug 25 is welded to the platform body 21, the center of the arc of the arcuate cross-section of the transition groove 252 is substantially coincident with the center of the semicircular cross-sectional shape presented at both ends of the solid portion, so that the two structures enclose a smooth transition passage 215.

As shown in fig. 4 and 6, the end surface of the platform body 21 for welding the plug 25 is recessed with a caulking groove 213 capable of being partially or completely inserted into the plug 25, and the extending depth of the groove wall of the caulking groove 213 can increase the bonding area between the platform body 21 and the plug 25 after welding, thereby improving the welding strength. Meanwhile, the welded plugs 25 are completely or only partially protruded out of the platform body 21, so that the subsequent welding operation of other plugs 25 is not influenced, and the overall dimension of the freezing platform 2 can be reduced.

To further increase the heat exchange area between the refrigerant and the platform body 21, please refer to fig. 6 and 7, in which fig. 6 is a cross-sectional view of the freezing platform cut by a vertical plane, and fig. 7 is a cross-sectional view of the freezing platform cut by a horizontal plane. In this embodiment, two or more flow path layers are arranged in the height direction of the platform body 21, each flow path layer includes a plurality of parallel flow paths 211 penetrating in the length or width direction of the platform body 21, that is, each flow path layer may be regarded as a set of the plurality of flow paths 211 located at the same height position. In the two adjacent flow path layers, the two adjacent flow paths 211 along the flow path are communicated through the plugs 25, so that the flow path layers are sequentially communicated. The direction of the arrows in fig. 6 and 7 is the flow direction of the refrigerant.

In order to ensure that the temperature of the refrigerant is increased as the refrigerant continuously exchanges heat with the platform during the circulation of the refrigerant in the platform body 21, the inflow end 10 of the circulation path is preferably located at the uppermost one of all the flow path layers in the present embodiment, and correspondingly, the outflow end 20 of the circulation path is located at the lowermost one of all the flow path layers.

Further, the inflow end 10 of the circulation path may be located in the middle of the length or width direction of the platform body 21, as shown in fig. 6 and 7, in this embodiment, the flow path 211 extends along the width direction of the platform body 21, and accordingly, the inflow end 10 of the circulation path is located in the middle of the length direction of the platform body 21, so that the middle of the platform body 21 exchanges heat with the low-temperature refrigerant first, and the middle of the platform body 21 exchanges heat with both sides of the platform body 21 at the same time, and compared with accessing the refrigerant from the end side of the platform body 21, the refrigerant can be solidified more efficiently. Alternatively, in other embodiments, the flow path 211 may extend along the length of the platform body 21, and accordingly, the inflow end 10 of the flow path is located at the middle of the platform body 21 in the width direction.

Referring to fig. 7 and 8, in the present embodiment, two circulation paths may be disposed in the platform body 21, and the two circulation paths are symmetrically disposed on two sides of a vertical plane in the length direction of the platform body 21, so that the two circulation paths simultaneously circulate the refrigerant and respectively exchange heat with portions of the platform body 21 located on two sides of the vertical plane, and under the same length of the circulation paths, the temperature drop of the refrigerant may be reduced, so as to solidify the freezing medium more quickly. It is understood that in the embodiment where the flow path 211 extends in the length direction of the platform body 21, the two flow paths are symmetrically arranged on both sides of the midperpendicular in the width direction of the platform body 21. The direction of the arrow in fig. 8 is the flow direction of the refrigerant.

In order to ensure the temperature, flow rate, flow velocity and other parameters of the refrigerant flowing into the two flow paths are consistent, so as to ensure the overall solidification rate of the refrigerant along the two sides of the vertical plane is consistent, the inflow ends 10 of the two flow paths are preferably arranged in an intersection manner, that is, the pipeline 22 for butting the freezing platform 2 and the external refrigeration device 3 is intersected with the three ends of the inflow ends 10 of the two flow paths, so that the refrigerant output by the external refrigeration device 3 can be uniformly distributed to the two flow paths.

It is preferable that the outflow ends 20 of the two flow paths are arranged to intersect each other, so that the length of the pipe 22 can be reduced, the number of valves provided in the pipe 22 can be reduced, and the refrigerant flow control can be simplified.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A freezing platform (2) comprises a platform body (21) and a pipeline (22), wherein the platform body (21) is provided with more than two flow paths (211) which penetrate along the length direction and/or the width direction of the platform body, and the flow paths (211) are sequentially communicated through a transition piece fixed on the platform body (21) so that a refrigerant input and output through the pipeline (22) can flow through the freezing platform (2) to freeze and fix a blank (100) placed on the platform body (21), and the freezing platform is characterized in that:

the transition piece is a plug (35), and the plug (35) is welded with the platform body (21);

the plugging side of each plug (35) is respectively butted with two adjacent flow paths (211) in the flow path of the refrigerant.

2. The refrigerated platform (2) of claim 1 characterized in that the blocking side of each plug (35) has a transition groove (352) recessed towards the inside of the plug (35), the transition groove (352) being used to smoothly connect two adjacent flow paths (211).

3. Refrigeration platform (2) according to claim 1, characterized in that the end face of the platform body (21) for welding the plugs (35) is recessed with a caulking groove (213) that can be partially or completely inserted into the plugs (35).

4. The refrigerated platform (2) of claim 1 characterized in that more than two flow path layers are arranged in the height direction of the platform body (21), each flow path layer comprising a plurality of parallel flow paths (211) running through in the length or width direction of the platform body (21); in the two adjacent flow path layers, the two adjacent flow paths (211) in the flow path are communicated through the plug (35).

5. The refrigerated platform (2) of claim 4 wherein the inflow end (10) of the flow path is located in the uppermost one of all the flow path layers; the outflow end (20) of the flow path is located in the lowermost one of all the flow path layers.

6. A refrigerated platform (2) according to claim 5 characterized in that the inflow end (10) of the flow path is located in the middle of the length or width direction of the platform body (21).

7. A cold platform (2) according to any of the claims 1-6, wherein two of the flow paths are arranged in the platform body (21) symmetrically on both sides of a median plane in the length or width direction of the platform body (21).

8. Refrigerated platform (2) according to claim 7 characterized in that the inflow ends (10) of the two flow paths are arranged converging.

9. A machining apparatus, characterized in that it comprises a refrigerated platform (2) according to any of claims 1-8 and a cooling device (3) for supplying a cooling medium to the refrigerated platform (2).

10. The machining apparatus according to claim 9, characterized in that the refrigerating device (3) comprises a first refrigerating section (31) and a second refrigerating section (32) both capable of providing a refrigerant to the refrigerated platform (2), wherein the refrigerating power of the first refrigerating section (31) is greater than the refrigerating power of the second refrigerating section (32).

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