CN116854349A

CN116854349A - Precise rolling equipment

Info

Publication number: CN116854349A
Application number: CN202310662869.1A
Authority: CN
Inventors: 李钦军; 杨高; 龚峰; 杨康; 秦荣希
Original assignee: Shenzhen University
Current assignee: Shenzhen University
Priority date: 2023-06-05
Filing date: 2023-06-05
Publication date: 2023-10-10

Abstract

The application belongs to the technical field of glass hot pressing equipment, and particularly relates to precise rolling equipment. The precision rolling apparatus includes: the rolling structure comprises a box body with a hot-pressing cavity, a roller rotatably arranged in the hot-pressing cavity and a driver for driving the roller to rotate, and an avoidance hole is formed in the bottom of the hot-pressing cavity; the moving structure is positioned below the roller and comprises a horizontal moving assembly and a vertical moving assembly connected with the horizontal moving assembly; and the heating positioning structure is positioned below the avoidance hole and comprises a heating component which is connected with the vertical moving component and provided with a heating surface and a positioning plate which is arranged above the heating component and covers and abuts against the heating surface, the positioning plate is provided with a positioning hole corresponding to the position of the heating surface, the heating surface is partially exposed at the positioning hole, the shape of the positioning hole is matched with that of a workpiece, the workpiece is accommodated and positioned in the positioning hole, and the heating surface at the positioning hole is covered. The application can improve the uniformity of the temperature field of the heating surface and the positioning precision of the glass plate.

Description

Precise rolling equipment

Technical Field

The application belongs to the technical field of glass hot pressing equipment, and particularly relates to precise rolling equipment.

Background

Glass roller presses are a very important industrial device, which play a vital role in the manufacture of glass products. Glass roll presses are used in glass processing machinery, primarily for pressing, processing, and improving the physical and chemical properties of glass to improve the strength, light transmission, transparency, and appearance of the glass.

The heating structure is an important component of the glass roll press for providing a heating energy source for heating the glass material. In the existing glass roller press, when the glass plate is processed, the glass plate is directly placed on a heating surface of a heating structure, the glass plate is heated and softened through heat conduction of the heating surface, and then the glass plate is hot-pressed through a roller engraved with a microstructure.

There are six-axis rolling machines on the market that control the movement of the rolling machine and the positioning of the glass sheets by using multiple axes to achieve greater precision and control. However, these existing six-axis rolling machines are typically bulky, complex to operate, expensive, and limited to high-end applications.

In the using process of the common rolling machine, the heating surface of the heating structure is partially covered by the glass plate, the heat loss rate is low, the other part is in a bare state, the heat loss rate is high, the temperature field of the heating block is unevenly distributed, the glass plate can also be unevenly distributed in the heating process, under severe conditions, the glass plate can be cracked due to thermal stress and the thermal expansion precision is reduced, the glass plate is directly placed on the heating surface, the positioning precision of the glass plate is poor in the subsequent hot pressing process, the displacement is easy to occur, and the hot pressing precision is reduced.

Disclosure of Invention

The embodiment of the application aims to provide precise rolling equipment, which aims to solve the problems of improving the heating uniformity of a glass workpiece and improving the positioning accuracy of the glass workpiece.

In order to achieve the above purpose, the application adopts the following technical scheme:

there is provided a precision rolling apparatus for hot-pressing a workpiece, the workpiece being plate-shaped, the precision rolling apparatus comprising:

the rolling structure comprises a box body with a hot-pressing cavity, a roller rotatably arranged in the hot-pressing cavity and a driver for driving the roller to rotate, wherein an avoidance hole is formed in the bottom of the hot-pressing cavity;

the moving structure is positioned below the roller and comprises a horizontal moving assembly and a vertical moving assembly connected with the horizontal moving assembly; and

the heating positioning structure is positioned below the avoidance hole and comprises a heating component connected with the vertical moving component and provided with a heating surface and a positioning plate arranged above the heating component and covering and abutting against the heating surface, the positioning plate is provided with a positioning hole corresponding to the position of the heating surface, the heating surface is partially exposed at the positioning hole, the shape of the positioning hole is matched with the workpiece, and the workpiece is accommodated and positioned in the positioning hole and covers the heating surface at the positioning hole.

The application has the beneficial effects that: the precise rolling equipment comprises a rolling structure, a moving structure and a heating positioning structure, wherein the heating positioning structure comprises a heating assembly and a positioning plate, the positioning plate is arranged above the heating surface and covers and abuts against the heating surface, so that the heat loss rate of the heating surface can be reduced, the uniformity of a temperature field of the heating surface is improved, positioning holes are formed in the positioning plate, the glass plate can be placed and positioned in the positioning holes, the positioning precision of the glass plate is improved, and the glass plate can be kept stable in the rolling process of the glass plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or exemplary technical descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic perspective view of a precision rolling apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of a partial explosion of the precision rolling apparatus of FIG. 1;

FIG. 3 is a schematic perspective view of the heating positioning structure of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the heating positioning structure of FIG. 3;

FIG. 5 is an exploded schematic view of the heating positioning structure of FIG. 3;

FIG. 6 is a schematic perspective view of a heating positioning structure according to another embodiment of FIG. 2;

fig. 7 is an exploded schematic view of the heating positioning structure of fig. 6.

Wherein, each reference sign in the figure:

200. precision rolling equipment; 300. a roll-in structure; 301. a case; 302. a driver; 303. a frame; 304. a roller; 305. an adapter; 400. a moving structure; 401. a horizontal movement assembly; 402. tilting the platform; 403. a vertical movement assembly; 404. a vacuum rotary heat insulation platform; 3011. a hot pressing cavity; 3012. avoidance holes; 26. an alignment plate; 300. a glass plate; 261. a support plate; 263. a heat-blocking plate; 262. a fixing groove; 27. a cooling plate; 100. a heating positioning structure; 10. a heating assembly; 11. a heating sheet; 12. a heating block; 13. leveling sheets; 121. a heating surface; 20. a positioning plate; 21. a first plate; 211. a half plate; 22. a second plate; 23. a limit part; 212. a heat shielding part; 24. positioning holes; 241. a positioning groove; 31. a heat insulation table; 32. a support table; 321. a heat shield; 322. a base; 323. a connection hole; 213. a connecting groove; 231. a through hole; 311. a limit groove; 271. a fixing hole; 264. aligning the notch;

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, are for convenience of description only, and are not intended to indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art as appropriate. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.

Referring to fig. 1 to 3, an embodiment of the present application provides a precision rolling apparatus 200 for hot pressing a workpiece, wherein the workpiece is a plate-shaped workpiece, and in this embodiment, the workpiece is a glass plate 600 made of optical glass, and the optical glass has precise optical characteristics and can control, focus and disperse light, so as to realize functions of an optical device. It is appreciated that the heated positioning structure can add the glass sheet 600 to the glass transition point temperature to enable subsequent rolling of the glass sheet 600.

Referring to fig. 1 to 6, the precision rolling apparatus 200 includes: the roll press structure 300, the moving structure 400, and the heating positioning structure in which the glass sheet 600 is placed. The heating and positioning structure can heat the glass sheet 600 to a glass transition point temperature to soften the glass sheet 600 so as to roll the glass sheet 600 in an atmospheric environment.

Referring to fig. 1 to 3, a rolling structure 300 includes a box 301 having a hot pressing chamber 3011, a roller 304 rotatably disposed in the hot pressing chamber 3011, and a driver 302 for driving the roller 304 to rotate, wherein a microstructure is formed on a side surface of the roller 304, and the microstructure includes a groove structure with a micrometer size and/or a groove structure with a nanometer size. The cavity bottom of the hot pressing cavity 3011 is provided with an avoidance hole 3012, and the avoidance hole 3012 is communicated with the hot pressing cavity 3011.

Referring to fig. 1 to 3, the moving structure 400 is located below the roller 304 and includes a horizontal moving assembly 401 and a vertical moving assembly 403 connected to the horizontal moving assembly 401; the heating positioning structure is located below the avoiding hole 3012 and comprises a heating assembly 10 which is connected with the vertical moving assembly 403 and provided with a heating surface 121, and a positioning plate 20 which is arranged above the heating assembly 10 and covers and abuts against the heating surface 121, a positioning hole 24 is formed in the position, corresponding to the heating surface 121, of the positioning plate 20, the heating surface 121 is partially exposed at the positioning hole 24, the shape of the positioning hole 24 is matched with a workpiece, the workpiece is accommodated and positioned in the positioning hole 24, and the heating surface 121 at the positioning hole 24 is covered.

The positioning plate 20 is made of a ceramic material having excellent high temperature resistance, and can maintain the stability of its structure and performance in a high temperature environment. This makes the ceramic material an ideal thermal insulation material, and the ceramic material also has low thermal conductivity, which can effectively reduce the outward conduction of heat at the heating surface 121, reduce the heat loss of the heating surface 121, and improve the uniformity of the temperature field of the heating surface 121. The positioning plate 20 is provided with a positioning hole 24 at a position corresponding to the heating surface 121, the heating surface 121 is partially exposed at the positioning hole 24, the shape of the positioning hole 24 is matched with a workpiece, so that the glass plate 600 covers the exposed area of the heating surface 121, the workpiece is accommodated and positioned in the positioning hole 24, the positioning precision of the glass plate 600 is improved, and the glass plate 600 is kept stable in the subsequent hot pressing process.

Referring to fig. 1-3, it will be appreciated that the vertical movement assembly 403 drives the heating positioning structure upward to move the glass sheet 600 upward against the roller 304, the driver 302 drives the roller 304 to rotate, and the horizontal movement assembly 401 drives the glass sheet 600 to move horizontally laterally to replicate the microstructure on the roller 304. The precise rolling device 200 provided in this embodiment includes a rolling structure 300, a moving structure 400 and a heating positioning structure, the heating positioning structure includes a heating assembly 10 and a positioning plate 20, the positioning plate 20 is disposed above the heating surface 121 and covers and abuts against the heating surface 121, so that the heat loss rate of the heating surface 121 can be reduced, the uniformity of the temperature field of the heating surface 121 is improved, and the positioning plate 20 is provided with a positioning hole 24, so that the glass plate 600 can be placed and positioned in the positioning hole 24, the positioning precision of the glass plate 600 is improved, the glass plate 600 can be kept stable by the roller 304 in the process of rolling the glass plate 600, and the structure is simple and the cost is low.

It can be further appreciated that the positioning plate 20 directly abuts against the heating surface 121, so that the area of the heating surface 121 directly contacting with oxygen can be reduced, the oxidation reaction of the heating surface 121 can be reduced, and the service life of the heating assembly 10 can be prolonged.

Referring to fig. 1 to 3, it will be appreciated that in this embodiment, the glass plate 600 is rectangular, the positioning hole 24 is also rectangular, and in other embodiments, the positioning plate 20 may be circular, which is not limited herein, and may be selected according to practical situations.

Referring to fig. 1 to 3, alternatively, the driver 302 may be a servo motor, and an output shaft of the servo motor is connected to one end of the roller 304, and two ends of the roller 304 are respectively rotatably disposed in the hot pressing chamber 3011 through two adapter seats 305.

Optionally, the heating positioning structure further includes a heat insulation table 31, the heat insulation table 31 is connected with the vertical lifting component, and the heating component 10 is arranged on the heat insulation table 31, the heat insulation table 31 is made of a material with good heat insulation performance, such as mica material, and the temperature of the vertical lifting component can be prevented from being too high through the heat insulation table 31.

Referring to fig. 3 to 5, in some embodiments, the positioning plate 20 includes a first plate 21 and a second plate 22, the first plate 21 is provided with a positioning groove 241, an extending path of the positioning groove 241 is arranged along a first direction, one end of the second plate 22 is slidably arranged in the positioning groove 241 and forms a positioning hole 24 together with an inner wall of the positioning groove 241, and the first direction is perpendicular to an axial direction of the roller 304.

Referring to fig. 3 to 5, it will be appreciated that the glass sheet 600 expands in the first direction during heating, and during expansion of the glass sheet 600, the second plate 22 is pushed to slightly move in the first direction and out of the positioning groove 241, so that the shape of the positioning hole 24 is adapted to the shape of the expanded glass sheet 600, and brittle fracture of the glass due to excessive positioning is avoided.

Referring to fig. 3 to 5, in some embodiments, the positioning plate 20 further includes a limiting portion 23 connected to the other end of the second plate 22 and an elastic member having elastic restoring force, one end of the elastic member is connected to the limiting portion 23, and the other end of the elastic member abuts against the first plate 21, and the second plate 22 moves a predetermined distance towards the outside of the positioning slot 241, so that the elastic member is in a stretched state.

Referring to fig. 3 to 5, it can be understood that two limiting portions 23 are provided, two second plates 22 are located between the two limiting portions 23, and the two limiting portions 23 and the second plates 22 are integrally formed, so as to reduce cost. The elastic member may be a tube spring, and the tube springs are disposed between the two limiting portions 23 and the first plate 21, and the second plate 22 moves out of the positioning groove 241, so that the elastic tension of the tube springs can keep the second plate 22 in contact with the glass plate 600, thereby improving the positioning accuracy of the glass plate 600, and preventing the glass plate 600 from being significantly changed in the positioning hole 24.

Referring to fig. 3 to 5, optionally, the side surface of the first plate 21 is further provided with a threaded hole, the position of the limiting portion 23 corresponding to the threaded hole is provided with a through hole 231, one end of the bolt is threaded through the through hole 231 and is screwed into the threaded hole, so as to connect the second plate 22 and the first plate 21, and it is understood that the locking force of the bolt should not be too large, so that the second plate 22 can move a certain distance relative to the first plate 21, and the moving distance is generated by expansion of the glass plate 600 along the first direction. During heating, glass sheet 600 expands slightly and pushes second plate 22 outwardly of locating groove 241 to allow locating hole 24 to accommodate glass sheet 600 while avoiding brittle fracture of glass sheet 600.

Referring to fig. 3 to 5, in some embodiments, the heating positioning structure further includes two support tables 32 connected to the heat insulation table 31, the two support tables 32 are spaced apart along the second direction, the heating assembly 10 is located between the two support tables 32, two ends of the first plate 21 are respectively connected to the two support tables 32, the first direction is orthogonal to the second direction, and the axial direction of the roller 304 is parallel to the second direction.

Referring to fig. 3 to 5, it can be understood that the support of the first plate 21 can be achieved by the support tables 32, and two ends of the first plate 21 along the second direction are respectively connected to the two support tables 32, so that the first plate 21 can be kept stable during the heating process.

Referring to fig. 3 to 5, in some embodiments, the supporting table 32 is provided with a connecting hole 323, the first plate 21 includes two half plates 211 that are abutted, each half plate 211 is provided with a connecting slot 213 corresponding to the connecting hole 323, the connecting slot 213 extends along the second direction, and the heating positioning structure further includes a connecting piece, one end of which passes through the connecting slot 213 and is located in the connecting hole 323. The connecting member may be a bolt, and the connecting hole 323 may be a screw hole. One end of the bolt passes through the connecting groove 213 and is screwed in the connecting hole 323, so that the two half plates 211 are respectively connected with the two support tables 32. Meanwhile, the locking force of the bolts should not be too large, so that one half of the plates 211 can move a certain distance relative to the other half of the plates 211, and the moving distance is generated by the expansion of the glass plate 600 along the second direction, that is, the glass plate 600 slightly expands along the second direction during the heating process, and pushes the two half of the plates 211 to move back to back, so that the glass plate 600 is prevented from being broken.

Referring to fig. 3 to 5, it can be further understood that the connection groove 213 extends along the second direction, so that if the connection hole 323 is misaligned with the predetermined position due to a machining error during the machining process, the bolt can be moved along the second direction, so as to offset the machining error of the connection hole 323, and the bolt can smoothly pass through the connection groove 213 and be screwed into the connection hole 323.

It can be appreciated that during the expansion process of the glass plate 600 in the second direction when heated, the two half plates 211 can slightly move along the second direction, so as to avoid the glass plate 600 from being limited in expansion and brittle failure, and meanwhile, one ends of the two half plates 211 are abutted, so that the glass plate 600 can be positioned, and the positioning accuracy of the glass plate 600 is improved.

Referring to fig. 3 to 5, in some embodiments, the support table 32 includes a base 322 connected to the heat insulation table 31 and a heat shield 321 connected to the base 322, and the first plate 21 is connected to the heat shield 321.

It will be appreciated that both the base 322 and the heat shield 321 may also be formed of ceramic material, and that the heat shield 321 may prevent rapid lateral loss of heat from the heating assembly 10, improving the uniformity of the temperature field at the heating surface 121.

Referring to fig. 3 to 5, in some embodiments, the heating assembly 10 includes a heating block 12 having a heating surface 121 and a heating plate 11 connected to the heating block 12, the heating block 12 is provided on a side surface of the heating block 12, and the heating plate 11 is at least partially located in the heating hole.

Referring to fig. 3 to 5, it can be understood that the shape of the heating hole is adapted to the shape of the heating plate 11, and in this embodiment, the heating plate 11 is a ceramic-copper block heating plate 11. The ceramic-copper block heater chip 11 is a heating element for providing a heat source in a high temperature environment. The ceramic composite material consists of a ceramic material and a copper block, and combines the advantages of the two materials. The ceramic part is typically made of a high temperature ceramic material such as Alumina ceramic (Alumina) or Silicon Nitride ceramic (Silicon Nitride). The ceramic materials have good high temperature resistance and insulating property, and can bear thermal stress and electric insulation requirements in a high-temperature environment. The copper block portion is used to provide current and heat conduction functions. Copper has good electrical and thermal conductivity, can efficiently transfer electrical and thermal energy to the ceramic part, and uniformly distribute the thermal energy over the entire heater chip 11. The heating sheets 11 are provided in two, and the two heating sheets 11 are respectively positioned at both ends of the heating block 12, so that the glass sheet 600 can be heated to the glass transition point temperature thereof.

Referring to fig. 3 to 5, optionally, the heating assembly 10 further includes a leveling sheet 13, the leveling sheet 13 is disposed on the heating surface 121 at a position corresponding to the positioning hole 24, and a leveling sheet 13 is further disposed on the leveling sheet 13, the glass plate 600 is placed on the leveling sheet 13, the leveling sheet 13 can improve the flatness of the heating surface 121, and the leveling sheet 13 is made of tungsten as a metal material.

Referring to fig. 3 to 5, it is further understood that the flat sheet 13 can resist high temperature and directly transfer to the glass sheet 600, so as to avoid uneven local heating of the glass sheet 600. The leveling sheet 13 also resists linear expansion and deformation of the material at the heating surface 121 caused by high temperature, and the strength, rigidity, shape and oxidation reaction of many metal materials are changed relatively greatly due to the high temperature. The flattening sheet 13 can improve the flatness of the heating surface 121, so that the glass sheet 600 is in a horizontal state as much as possible.

Referring to fig. 3 to 5, in some embodiments, the two ends of the first plate 21 extend towards the heat insulation table 31 respectively to form heat shielding portions 212, and the heat shielding portions 212 are used to reduce the heat loss rate of the heating assembly 10 from the heat shielding portions 212, so as to improve the uniformity of the temperature field at the heating surface 121.

Referring to fig. 3 to 5, in some embodiments, the heat insulation platform 31 is provided with a limiting groove 311, two ends of the limiting groove 311 extend to two opposite side surfaces of the heat insulation platform 31 respectively, at least a portion of the heating assembly 10 is located in the limiting groove 311, and the supporting platform 32 is connected to a bottom of the limiting groove 311. The heating assembly 10 and the support table 32 can be positioned by the positioning groove 241, and convenience and reliability of assembling the heating assembly 10 and the support table 32 can be improved.

Referring to fig. 3 to 5, the moving structure 400 further includes an inclined platform 402 for adjusting the levelness of the heating surface 121, and two ends of the inclined platform 402 are respectively connected to the horizontal moving assembly 401 and the vertical moving assembly 403.

Alternatively, the vertical movement assembly 403 is a ball screw elevation Z-stage and the tilt stage 402 is a ball screw tilt stage 402. A vacuum rotary heat insulation platform 404 is further arranged between the vertical moving component 403 and the heat insulation table 31, so that heat conduction downwards is prevented as much as possible, and the moving precision of the moving structure 400 is improved.

It will be appreciated that the combination of the horizontal movement assembly 401, the vertical movement assembly 403, and the inclined platform 402, makes the movement structure 400 a six-axis movement system, greatly improving the convenience and accuracy of movement of the glass sheet 600 relative to the rollers 304.

Referring to fig. 6 and 7, in some embodiments, the positioning plate 20 includes two positioning plates 26 slidably abutted to each other, each positioning plate 26 is provided with a positioning notch 264, and the two positioning plates 26 form the positioning hole 24 together through the two positioning notches 264.

Referring to fig. 6 and 7, the alignment notches 264 may alternatively have an L-shaped groove structure, so that during the thermal expansion of the glass sheet 600, the two alignment plates 26 can move slightly in the first direction and the second direction at the same time, so as to avoid brittle failure of the glass sheet 600.

Referring to fig. 6 and 7, in some embodiments, the heating positioning structure further includes a cooling plate 27 provided with a cooling channel, a heat-blocking block connected to the cooling plate 27, and two support plates 261 arranged on the cooling plate 27, wherein the two support plates 261 are arranged at intervals, the heating assembly 10 is located between the two support plates 261, the two alignment plates 26 are respectively connected to the two support plates 261, and the heat-blocking block is disposed between any one support plate 261 and the heating assembly 10. The heating block 12 is connected to the cooling plate 27, and the cooling plate 27 is provided on the heat insulating stage 31, and the rate of heat conduction to the heat insulating stage 31 can be reduced by the cooling plate 27.

Referring to fig. 6 and 7, it will be understood that the connection between the supporting plate 261 and the cooling plate 27 may also be a hole and slot structure, i.e. the cooling plate 27 is provided with a fixing hole 271, the supporting plate 261 is provided with a fixing slot 262, the extending direction of the fixing slot 262 is along the first direction, and the fixing member is inserted into the fixing slot 262 to connect and locate in the fixing hole 271 and maintain a proper locking force, so that when the glass expands along the first direction, the two alignment plates 26 can be pushed to slightly move along the first direction, so as to avoid brittle fracture of the glass.

Referring to fig. 6 and 7, optionally, the supporting plate 261 is also made of ceramic material and integrally formed with the corresponding alignment plate 26, and the thermal block is made of metal material, which is located between the supporting plate 261 and the side surface of the heating block 12, and the thermal block made of metal material can limit the heat of the heating assembly 10 from instantaneously flowing excessively to the supporting plate 261 to avoid the occurrence of brittle fracture due to local instantaneous overheating of the supporting plate 261, wherein the metal material can be alumina.

The roll-in structure 300 further comprises a frame 303 supporting the box 301. It can be appreciated that the avoiding holes 3012 can be sealed, so that the use condition of the hot pressing chamber 3011 in a vacuum environment is met, and the convenience in use of the precise rolling device 200 is improved.

The foregoing is merely an alternative embodiment of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A precision rolling apparatus for hot-pressing a workpiece, the workpiece being plate-shaped, characterized in that the precision rolling apparatus comprises:

2. The precision rolling apparatus of claim 1, wherein: the locating plate comprises a first plate and a second plate, wherein a locating groove is formed in the first plate, an extending path of the locating groove is arranged along a first direction, one end of the second plate is slidably arranged in the locating groove and forms a locating hole together with the inner wall of the locating groove, and the first direction is perpendicular to the axial direction of the roller.

3. The precision rolling apparatus of claim 2, wherein: the locating plate further comprises a limiting part connected with the other end of the second plate and an elastic piece with elastic restoring force, one end of the elastic piece is connected with the limiting part, the other end of the elastic piece is abutted to the first plate, and the second plate moves out of the locating groove for a preset distance so that the elastic piece is in a stretching state.

4. The precision rolling apparatus of claim 2, wherein: the heating positioning structure further comprises two supporting tables connected with the vertical moving assembly, the two supporting tables are arranged at intervals along the second direction, the heating assembly is located between the two supporting tables, two supporting tables are connected to two ends of the first plate respectively, and the first direction and the second direction are orthogonally arranged.

5. The precision rolling apparatus of claim 4, wherein: the supporting table is provided with a connecting hole, the first plate comprises two half plates which are in butt joint, each half plate is provided with a connecting groove corresponding to the position of the connecting hole, the connecting grooves extend along the second direction, the heating positioning structure further comprises a connecting piece, and one end of the connecting piece penetrates through the connecting grooves and is located in the connecting hole.

6. The precision rolling apparatus of claim 4, wherein: the support table comprises a base connected with the vertical moving assembly and a heat shield connected with the base, and the first plate is connected with the heat shield.

7. The precision rolling apparatus as claimed in any one of claims 2 to 6, wherein: the two ends of the first plate extend towards the vertical moving assembly respectively to form heat blocking parts, and the heat blocking parts are used for reducing the loss speed of heat of the heating assembly from the heat blocking parts.

8. The precision rolling apparatus as claimed in any one of claims 1 to 6, wherein: the movable structure further comprises an inclined platform for adjusting the levelness of the heating surface, and two ends of the inclined platform are respectively connected with the horizontal movable assembly and the vertical movable assembly.

9. The precision rolling apparatus of claim 1, wherein: the positioning plate comprises two opposite positioning plates which are in sliding butt joint, each of the opposite positioning plates is provided with an opposite positioning notch, and the two opposite positioning plates jointly form the positioning hole through the two opposite positioning notches.

10. The precision rolling apparatus of claim 9, wherein: the heating positioning structure further comprises a cooling plate provided with a cooling flow passage, a heat-resisting block connected with the cooling plate and a supporting plate arranged on the cooling plate, wherein the two supporting plates are arranged at intervals, the heating assembly is located between the two supporting plates, the two counterpoint plates are respectively connected with the two supporting plates, and the heat-resisting block is arranged between any one of the supporting plates and the heating assembly.