CN110900490A

CN110900490A - Stress-free fixing device based on freezing disc

Info

Publication number: CN110900490A
Application number: CN201911301241.9A
Authority: CN
Inventors: 丁劲松; 李双; 孙念杰
Original assignee: Suzhou Elite Pml Precision Mechanism Ltd
Current assignee: Suzhou Elite Pml Precision Mechanism Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-03-24
Anticipated expiration: 2039-12-17
Also published as: CN110900490B

Abstract

The invention provides a stress-free fixing device based on a freezing disc, which comprises a box body, a quick refrigerating device and the freezing disc, wherein a heat dissipation network is arranged on a heat dissipation surface of the freezing disc, and a plurality of first grooves and a plurality of second grooves of the heat dissipation network are mutually communicated, so that cold air directly sprayed on the heat dissipation surface by the quick refrigerating device can quickly cover the freezing disc, the heat taking efficiency is improved, and the freezing fixing effect of the freezing disc is ensured; the spider-web type stable stripes are arranged on the fixing surface of the freezing disc, so that the friction force between the workpiece and the fixing surface is increased, meanwhile, the circumferential grooves and the radial grooves can weaken the influence of melted water on the workpiece, and the stability of the workpiece on the freezing disc is ensured. The stress-free fixing device is reasonable in structural design, and the processing efficiency and the processing quality of workpieces are effectively guaranteed.

Description

Stress-free fixing device based on freezing disc

Technical Field

The invention relates to the technical field of clamps for machining, in particular to a stress-free fixing device based on a freezing disc.

Background

In machining, a clamp is a device on a machine tool for clamping a workpiece (and guiding a tool) and serves to position the workpiece so that it obtains the correct position relative to the machine tool and the tool and to clamp the workpiece securely. However, in the application of the traditional clamp, for special parts, a special clamp is required to be adapted to the special parts, and the wide applicability is lacked; for a thin-wall material of a plate, the traditional clamp is easy to damage the material; for special precision machining, the precision of the traditional clamp is not high, and the manufacturing period is too long.

Compared with the traditional fixing modes such as clamp clamping, magnetic sucking disc and vacuum sucking disc, the freezing disc utilizes the characteristics of ice and water, realizes the conversion from water to ice by means of compressed air, fixes the workpiece to be processed, does not generate any stress, does not generate any deformation or damage on the workpiece, and is particularly suitable for the precise processing of non-metal brittle materials. Meanwhile, the freezing disc can be suitable for processing workpieces of different shapes and materials, and can be fixed by only utilizing one workpiece surface, so that the processing space is maximized. However, when the heat generated in the machining process is large, the ice used for fixing the product melts, so that the fixing of the freezing disc to the workpiece is weakened, and the workpiece is easier to move due to the influence of the water generated by melting, so that the machining effect of the workpiece is influenced.

Disclosure of Invention

The invention aims to solve the problem that in the prior art, when the heat generated in the machining process is more, a freezing disc cannot effectively fix a workpiece, and the machining effect of the workpiece is influenced, and provides a stress-free fixing device based on the freezing disc.

In order to achieve the purpose, the invention adopts the following technical scheme: a stress-free fixing device based on a freezing disc comprises a box body, a quick refrigerating device and a freezing disc, wherein the box body comprises a box body bottom plate and a box body side wall, the box body side wall is arranged on the box body bottom plate, the freezing disc is parallel to the box body bottom plate and is connected with the box body side wall, the freezing disc comprises a radiating surface facing the box body bottom plate and a fixing surface far away from the box body bottom plate, a radiating network is arranged on the radiating surface and comprises a plurality of first grooves arranged in parallel and a plurality of second grooves arranged perpendicular to the first grooves, the first grooves and the second grooves are mutually communicated, a stabilizing stripe is arranged on the fixing surface and integrally has a spider-net type structure, the stabilizing stripe comprises a circumferential groove arranged in a mode of diffusing outwards from the center and a radial groove arranged in a mode of extending outwards from the center, a plurality of fixing bulges arranged in the radial groove, a plurality of fixing bulges arranged, The side wall of the box body and the freezing disc form an accommodating space, the quick refrigerating device is arranged in the accommodating space, a compressed gas inlet and a cold air exhaust port are formed in the side wall of the box body, the compressed gas inlet is connected with the quick refrigerating device, and the quick refrigerating device sprays cold air on the radiating surface.

Preferably, the box still includes middle fixed plate, and middle fixed plate is located the box bottom plate and freezes between the dish, and middle fixed plate is on a parallel with the box bottom plate, and middle fixed plate is connected with the box lateral wall, and quick refrigerating plant fixes on middle fixed plate, and accommodation space is including being located middle fixed plate and freezing last accommodation space between the dish and being located the lower accommodation space between middle fixed plate and the box bottom plate, and the air conditioning gas vent sets up on the box lateral wall that last accommodation space corresponds. Furthermore, the compressed gas inlet is positioned on the side wall of the box body corresponding to the upper accommodating space; the outer side of the side wall of the box body is provided with a pneumatic switch, the pneumatic switch comprises a first connecting end used for receiving compressed gas, a second connecting end used for conveying the compressed gas when the pneumatic switch is opened and a third connecting end used for discharging the compressed gas when the pneumatic switch is closed, the second connecting end is communicated with a compressed gas inlet, the third connecting end is communicated with the lower accommodating space through a guide pipe, and a compressed gas exhaust port is formed in the side wall of the box body corresponding to the lower accommodating space.

Preferably, be equipped with first support column in the lower accommodation space, the lower extreme of first support column is fixed on the box bottom plate, and the upper end of first support column is fixed on middle fixed plate. Furthermore, a second supporting column is arranged in the accommodating space, the lower end of the second supporting column is fixed on the bottom plate of the box body, a through hole for the second supporting column to pass through is formed in the middle fixing plate, and the upper end of the second supporting column passes through the through hole and is fixed on the freezing plate.

Preferably, a pneumatic switch is arranged on the outer side of the side wall of the box body, the pneumatic switch comprises a first connecting end used for receiving compressed gas, a second connecting end used for conveying the compressed gas when the pneumatic switch is turned on, and a third connecting end used for discharging the compressed gas when the pneumatic switch is turned off, and the second connecting end is communicated with the compressed gas inlet.

Preferably, quick refrigerating plant includes a plurality of sub refrigerating unit, is equipped with diverging device in the accommodation space, and diverging device includes total link and a plurality of sub link, and total link and a plurality of sub link intercommunication, total link and compressed gas import intercommunication, a plurality of sub link respectively with a plurality of sub refrigerating unit one-to-one. Further, the plurality of sub-refrigeration units are vortex tubes.

Preferably, the side wall of the box body is detachably connected with the bottom plate of the box body, and the freezing tray is detachably connected with the side wall of the box body.

Compared with the prior art, the invention has the beneficial effects that: the heat dissipation network is arranged on the heat dissipation surface of the freezing disc, and the plurality of first grooves and the plurality of second grooves of the heat dissipation network are communicated with each other, so that cold air directly sprayed on the heat dissipation surface by the quick refrigerating device can quickly cover the freezing disc, the heat taking efficiency is improved, and the freezing fixing effect of the freezing disc is ensured; the spider-web type stable stripes are arranged on the fixing surface of the freezing disc, so that the friction force between the workpiece and the fixing surface is increased, meanwhile, the circumferential grooves and the radial grooves can weaken the influence of melted water on the workpiece, and the stability of the workpiece on the freezing disc is ensured. The stress-free fixing device is reasonable in structural design, and the processing efficiency and the processing quality of workpieces are effectively guaranteed.

Drawings

FIG. 1 is a schematic perspective view of a non-stressed freezing tray-based fixture according to an embodiment of the present invention;

FIG. 2 is a perspective view of FIG. 1 from another perspective;

FIG. 3 is a schematic view of the internal structure of FIG. 1;

FIG. 4 is a schematic diagram of the internal structure of FIG. 1 from another perspective;

FIG. 5 is a schematic view of the heat-dissipating surface of the freezing tray of FIG. 1;

FIG. 6 is a perspective view of the first support column of FIG. 3;

fig. 7 is a perspective structural diagram of the second supporting column in fig. 3.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1 to 5 in combination, the invention relates to a stress-free freezing tray-based fixing device, which comprises a box body 1, a rapid refrigerating device 2 and a freezing tray 3, wherein the box body 1 comprises a box body bottom plate 11 and a box body side wall 12, the box body side wall 12 is arranged on the box body bottom plate 11, the freezing tray 3 is parallel to the box body bottom plate 11, the freezing tray 3 is connected to the box body side wall 12, the freezing tray 3 comprises a heat dissipation surface 31 facing the box body bottom plate 11 and a fixing surface 32 far away from the box body bottom plate 11, the heat dissipation surface 31 and the fixing surface 32 are two opposite surfaces of the freezing tray 3, a heat dissipation network 311 is arranged on the heat dissipation surface 31, the heat dissipation network 311 comprises a plurality of first grooves 312 arranged in parallel and a plurality of second grooves 313 arranged perpendicular to the first grooves 312, the plurality of first grooves 312 and the plurality of second grooves 313 are mutually communicated, a stabilizing stripe 321 is arranged on the fixing surface 32, and the stabilizing, the stabilizing stripe 321 includes a circumferential groove 322 extending outward from the center and a radial groove 323 extending outward from the center, a plurality of fixing protrusions 324 arranged along the radial direction are disposed in the radial groove 323, an accommodating space is formed between the box bottom plate 11, the box side wall 12 and the freezing tray 3, the rapid cooling device 2 is disposed in the accommodating space, a compressed gas inlet 121 and a cool air exhaust port 122 are disposed on the box side wall 12, the compressed gas inlet 121 is connected to the rapid cooling device 2, and the rapid cooling device 2 sprays cool air onto the heat dissipating surface 31. Because the heat dissipation surface 31 is provided with the heat dissipation network 311, the plurality of first grooves 312 and the plurality of second grooves 313 of the heat dissipation network 311 are communicated with each other, and the cold air is directly sprayed on the heat dissipation surface 31, the cold air can quickly cover the freezing disc 3, the heat taking efficiency is improved, and the freezing fixing effect of the freezing disc is ensured; the fixing surface 32 is provided with the spider-web type stabilizing stripe 321, the stabilizing stripe 321 comprises a circumferential groove 322, a radial groove 323 and a fixing protrusion 324, friction force between the workpiece and the fixing surface 32 is increased, and meanwhile, the circumferential groove and the radial groove can weaken the influence of melting water on the workpiece, and the stability of the workpiece on the freezing disc is ensured. Preferably, the freezing tray 3 is made of a copper plate, which has excellent heat conductivity and low price, thereby ensuring the transfer effect of cold air on the freezing tray and reducing the production cost of the freezing tray.

In a preferred embodiment, the cabinet side walls 12 are removably attached to the cabinet floor 11 and the freezing plate 3 is removably attached to the cabinet side walls 12. As shown in fig. 1 and 2, a first connection hole is formed in a side wall of the freezing plate 3, a second connection hole is formed in a position corresponding to the first connection hole at an upper end of the side wall 12 of the box body, and the first connection hole and the second connection hole are connected by a bolt; the tip that is close to box bottom plate 11 of box lateral wall 12 outwards is equipped with a week connecting portion, and connecting portion pass through bolted connection with box bottom plate 11, so both convenient dismantlement, also guarantee simultaneously that air conditioning is difficult for revealing by bolted connection department.

In order to control the start and the close of the device, the outer side of the side wall 12 of the box body is provided with a pneumatic switch 4, the pneumatic switch 4 comprises a first connecting end 41 for receiving compressed gas, a second connecting end 42 for conveying the compressed gas when the pneumatic switch 4 is opened and a third connecting end 43 for discharging the compressed gas when the pneumatic switch 4 is closed, the first connecting end 41 is communicated with the second connecting end 42 when the pneumatic switch 4 is opened, the second connecting end 42 is communicated with a compressed gas inlet 121, and the compressed gas inlet 121 is communicated with the quick refrigerating device 2 to convey the compressed gas to the quick refrigerating device 2 to generate cold air.

As shown in fig. 3, the box body 1 further includes an intermediate fixing plate 13, the intermediate fixing plate 13 is located between the box body bottom plate 11 and the freezing tray 3, the intermediate fixing plate 13 is parallel to the box body bottom plate 11, and the intermediate fixing plate 13 is connected with the box body side wall 12, the rapid cooling device 2 is fixed on the intermediate fixing plate 13, the accommodating space includes an upper accommodating space located between the intermediate fixing plate 13 and the freezing tray 3 and a lower accommodating space located between the intermediate fixing plate 13 and the box body bottom plate 11, and the cold air outlet 122 is disposed on the box body side wall 12 corresponding to the upper accommodating space. Through setting up middle fixed plate 13 for can set up different functional unit in last accommodation space and lower accommodation space, avoid taking place to interfere between each functional unit, guarantee the stability of each function. In a preferred embodiment, the compressed gas inlet 121 is disposed on the side wall 12 of the box body corresponding to the upper accommodating space, so as to shorten the length of the conduit between the rapid cooling device 2 and the compressed gas inlet 121, and at the same time, make the available space of the lower accommodating space large enough, so as to facilitate the functional expansion by adding functional components in the lower accommodating space.

When the outer side of the box side wall 12 of the fixing device is provided with the pneumatic switch 4, the third connecting end 43 of the pneumatic switch 4 is communicated with the lower accommodating space through a guide pipe so as to reduce the noise generated by the discharge of compressed gas when the pneumatic switch 4 is closed, and play a role of noise reduction, and the box side wall 12 corresponding to the lower accommodating space is provided with a compressed gas discharge port 123 so as to discharge the compressed gas in the lower accommodating space.

Be equipped with first support column 51 in the accommodation space down, the lower extreme of first support column 51 is fixed on box bottom plate 11, and the upper end of first support column 51 is fixed on middle fixed plate 13 to accommodation space's structural stability under the assurance plays the supporting role to each part on the middle fixed plate simultaneously. As shown in fig. 6, in a preferred embodiment, a first fixing groove 511 is provided on the lower end surface of the first support column 51, and a second fixing groove 512 is provided on the upper end surface of the first support column 51. Be equipped with first mounting hole on the box bottom plate 11, be connected through connecting pieces such as bolts, connecting rod between first fixed slot 511 and the first mounting hole, the preferred counter bore of first mounting hole to dismantle the convenience when guaranteeing that box bottom plate 11 steadily places, the change of each part and the interpolation of functional unit in the accommodation space under the convenience. The middle fixing plate 13 is provided with a second mounting hole, and the second fixing groove 512 is connected with the second mounting hole through a bolt, so that the dismounting is convenient.

The accommodating space is internally provided with a second supporting column 52, the lower end of the second supporting column 52 is fixed on the bottom plate 11 of the box body, the middle fixing plate 13 is provided with a through hole for the second supporting column 52 to pass through, and the upper end of the second supporting column 52 passes through the through hole and is fixed on the freezing tray 3, so that the freezing tray is supported, and the stability of the freezing tray is ensured. As shown in fig. 7, in a preferred embodiment, a connection pole 521 is disposed on the upper end surface of the second support column 52, and a third fixing groove 522 is disposed on the lower end surface of the second support column 52. Be equipped with the second mounting hole on the box bottom plate 11, be connected through connecting pieces such as bolts, connecting rod between third fixed slot 522 and the second mounting hole, the preferred counter bore of second mounting hole to dismantle the convenience when guaranteeing that box bottom plate 11 steadily places, change and the interpolation of functional unit of each part in the accommodation space under the convenience. The heat dissipation surface 31 of the freezing tray 3 is provided with a mounting groove 314, and the connecting column 521 is inserted into the mounting groove 314, so that the freezing tray 3 can be conveniently detached, and replacement of various components and addition of functional components in the accommodating space are facilitated.

Preferably, quick refrigerating plant 2 includes a plurality of sub refrigerating unit 21, in order to increase the area of freezing dish 3 contact air conditioning, improve the effect of freezing, guarantee the fixed effect to the work piece, and then improve the machining precision of work piece, be equipped with diverging device 6 in the accommodation space, diverging device 6 includes total link 61 and a plurality of sub-link 62, total link 61 and a plurality of sub-link 62 intercommunication, total link 61 and compressed gas import 121 intercommunication, a plurality of sub-link 62 respectively with a plurality of sub refrigerating unit 21 one-to-one. In the fixing device having the intermediate fixing plate 13, as shown in fig. 4, the dividing device 6 is disposed in the upper accommodating space, the compressed gas inlet 121 is disposed on the corresponding case side wall 12 of the upper accommodating space, the main connection end 61 communicates with the compressed gas inlet 121 to receive the compressed gas, the compressed gas is transmitted from the main connection end 61 to the plurality of sub-connection ends 62, and the plurality of sub-connection ends 62 are respectively connected with the plurality of sub-refrigeration units 21 one-to-one to transmit the compressed gas to the sub-refrigeration units 21. Further, the plurality of sub-refrigeration units 21 are vortex tubes, which are a mature rapid refrigeration technology, and the temperature of the compressed gas is rapidly reduced after passing through the vortex tubes. When the stress-free fixing device is used, when the plurality of sub-refrigeration units 21 are vertically fixed on the middle fixing plate 13, the cold air outlets of the plurality of sub-refrigeration units 21 are close to the heat dissipation surface 31 of the freezing disc 3 and directly spray cold air to the heat dissipation surface 31, so that the freezing effect is ensured, and the volume of the stress-free fixing device is as small as possible; when a plurality of sub-refrigeration units 21 are fixed on the middle fixing plate 13 in parallel, the cold air outlets of the sub-refrigeration units 21 are connected with bent pipes, the outlets of the bent pipes are close to the heat dissipation surface 31 of the freezing disc 3 and directly spray cold air to the heat dissipation surface 31, and the volume of the upper accommodation space can be reduced by controlling the vertical height of the bent pipes, so that the volume of the stress-free fixing device is reduced.

The working process is as follows: the pneumatic switch 4 is turned on, compressed air enters through the first connecting end 41, and then sequentially enters the plurality of sub-refrigeration units 21 through the second connecting end 42, the compressed air inlet 121, the main connecting end 61 and the plurality of sub-connecting ends 62, and the plurality of sub-refrigeration units 21 spray cold air to the heat radiating surface 31, so that the cold air quickly covers the freezing disc 3, and workpieces are fixed on the freezing disc 3.

According to the stress-free fixing device based on the freezing disc, the heat dissipation network is arranged on the heat dissipation surface of the freezing disc, and the first grooves and the second grooves of the heat dissipation network are communicated with each other, so that cold air directly sprayed on the heat dissipation surface by the quick refrigerating device can quickly cover the freezing disc, the heat taking efficiency is improved, and the freezing fixing effect of the freezing disc is guaranteed; the spider-web type stable stripes are arranged on the fixing surface of the freezing disc, so that the friction force between the workpiece and the fixing surface is increased, meanwhile, the circumferential grooves and the radial grooves can weaken the influence of melted water on the workpiece, and the stability of the workpiece on the freezing disc is ensured. The stress-free fixing device is reasonable in structural design, and the processing efficiency and the processing quality of workpieces are effectively guaranteed.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims

1. A stress-free fixing device based on a freezing disc is characterized by comprising a box body, a quick refrigerating device and a freezing disc, wherein the box body comprises a box body bottom plate and a box body side wall, the box body side wall is arranged on the box body bottom plate, the freezing disc is parallel to the box body bottom plate and is connected with the box body side wall, the freezing disc comprises a radiating surface facing the box body bottom plate and a fixing surface far away from the box body bottom plate, a radiating network is arranged on the radiating surface and comprises a plurality of first grooves arranged in parallel and a plurality of second grooves arranged perpendicular to the first grooves, the first grooves and the second grooves are mutually communicated, a stabilizing stripe is arranged on the fixing surface and is of a spider-web structure integrally, the stabilizing stripe comprises a circumferential groove arranged by diffusing from the center outwards and a radial groove arranged by extending outwards from the center, be equipped with a plurality of fixed archs along radial range in the radial recess, the box bottom plate the box lateral wall and freeze and form accommodation space between the dish, quick refrigerating plant sets up in the accommodation space, be equipped with compressed gas import and air conditioning gas vent on the box lateral wall, compressed gas access connection quick refrigerating plant, quick refrigerating plant spray air conditioning in on the cooling surface.

2. The device as claimed in claim 1, wherein the housing further comprises an intermediate fixing plate disposed between the housing bottom plate and the freezing tray, the intermediate fixing plate being parallel to the housing bottom plate and being connected to the housing side wall, the rapid cooling device being fixed to the intermediate fixing plate, the accommodating space including an upper accommodating space disposed between the intermediate fixing plate and the freezing tray and a lower accommodating space disposed between the intermediate fixing plate and the housing bottom plate, and the cool air outlet being disposed on the housing side wall corresponding to the upper accommodating space.

3. An ice tray-based unstressed fixture according to claim 2 wherein said compressed gas inlet is located in a side wall of said housing corresponding to said upper receiving space.

4. The device for fixing without stress on the basis of the freezing disk according to claim 2, wherein a pneumatic switch is provided on the outer side of the side wall of the box body, the pneumatic switch comprises a first connecting end for receiving the compressed gas, a second connecting end for delivering the compressed gas when the pneumatic switch is turned on, and a third connecting end for discharging the compressed gas when the pneumatic switch is turned off, the second connecting end is communicated with the compressed gas inlet, the third connecting end is communicated with the lower accommodating space through a conduit, and a compressed gas exhaust port is provided on the side wall of the box body corresponding to the lower accommodating space.

5. The device as claimed in claim 2, wherein a first support column is provided in the lower receiving space, a lower end of the first support column is fixed to the bottom plate of the box body, and an upper end of the first support column is fixed to the intermediate fixing plate.

6. The device of claim 5, wherein a second supporting column is disposed in the receiving space, a lower end of the second supporting column is fixed to the bottom plate of the box body, a through hole is formed in the middle fixing plate for the second supporting column to pass through, and an upper end of the second supporting column passes through the through hole and is fixed to the freezing tray.

7. The non-stressed freezing tray-based fastening device according to claim 1, wherein a pneumatic switch is provided on the outside of the side wall of the box, the pneumatic switch comprising a first connection for receiving compressed gas, a second connection for delivering compressed gas when the pneumatic switch is turned on, and a third connection for discharging compressed gas when the pneumatic switch is turned off, the second connection being in communication with the compressed gas inlet.

8. The device according to any one of claims 1 to 7, wherein the quick cooling device comprises a plurality of sub-cooling units, a flow dividing device is arranged in the accommodating space, the flow dividing device comprises a main connecting end and a plurality of sub-connecting ends, the main connecting end is communicated with the compressed gas inlet, and the plurality of sub-connecting ends are respectively connected with the plurality of sub-cooling units one by one.

9. The ice tray-based non-stressed fixture of claim 8, wherein the plurality of sub-refrigeration units are vortex tubes.

10. A freeze tray based unstressed fixture, according to any one of claims 1 to 7 wherein said cabinet side walls are removably attached to said cabinet floor and said freeze tray is removably attached to said cabinet side walls.