CN113683296A

CN113683296A - Numerical control glassware fire burnishing machine

Info

Publication number: CN113683296A
Application number: CN202110985410.6A
Authority: CN
Inventors: 卢建坤; 沈建明
Original assignee: Huzhou Hesheng Automation Technology Co ltd
Current assignee: Huzhou Hesheng Automation Technology Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2021-11-23

Abstract

The invention provides a numerical control glassware fire polishing machine, which comprises: a load-bearing unit comprising: the device is provided with a fixing component for placing a product to be tested and a rotating wheel component arranged at the bottom of the fixing component; the supporting and limiting unit is provided with a sliding chute for the movement of the bearing unit, and the sliding chute is arranged into an arc-shaped section; the conveying unit is used for driving the bearing unit to run in the chute; a tensioning unit: for adjusting the tension of the conveyor unit; the special design that one side of the arc protrudes outwards is shown, one end of the special design is a driving assembly, the other end of the special design is a tensioning unit, the conveying unit is effectively supported by the tensioning unit, and compared with the design of the existing mouth dryer, the special design effectively reduces the load capacity by 60% and saves the driving energy consumption; in actual operation, the continuous and intermittent operation functions of the device can be realized by adjusting the number of the arranged autorotation driving units so as to effectively adjust the autorotation driving units according to actually required processes, thereby improving the processing quality of finished products and reducing the labor intensity.

Description

Numerical control glassware fire burnishing machine

Technical Field

The invention relates to the technical field of glass manufacturing equipment, in particular to a numerical control glassware fire polishing machine.

Background

The existing glassware processing steps include material selection, proportioning, molding, drying, mouth flame polishing, tempering and the like, wherein the glassware polishing is to melt and round the notch of the glass cup by flame heating.

At present, mechanical equipment for drying and polishing glassware is mainly finished by a disc type drying machine, a power device drives a rotary table to operate, a plurality of cup holders for bearing the glassware are fixed on the rotary table, and the mechanical equipment mainly has the following technical problems during operation:

1. the structure has a single function, the rotating structure of the cup stand is fixed by a large supporting device to drive the cup stand to realize transmission, the loading force is large, the driving energy consumption is relatively high, and the production cost is high;

2. when the flame polishing of glassware is realized, generally, a flame control gun is manually operated to process a workpiece, but the product is easily heated unevenly, so that the quality of the finished product is difficult to control, and the production efficiency is poor.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a numerical control glassware fire polishing machine, aiming at effectively supporting a conveying unit and adjusting the tension of the conveying unit under the conditions of low load and low driving energy consumption.

According to an embodiment of the invention, a numerically controlled glassware fire polishing machine includes:

a load-bearing unit comprising: the device is provided with a fixing component for placing a product to be tested and a rotating wheel component arranged at the bottom of the fixing component;

the supporting and limiting unit is provided with a sliding chute for the movement of the bearing unit, and the sliding chute is arranged into an arc-shaped section;

the conveying unit is used for driving the bearing unit to run in the chute;

a tensioning unit: for adjusting the tension of the conveyor unit.

The principle and technology of the invention are as follows: the conveying unit arranged in the supporting and limiting unit chute operates to drive the fixing component for placing the product to be detected to synchronously operate; the sliding groove is of an arc-shaped section structure, so that the tensioning unit can further adjust the tensioning force of the conveying unit.

Preferably, the apparatus further comprises a rotation driving unit disposed at the bottom of the carrying unit, and the rotation driving unit comprises: the device comprises a mounting rack, a vertical rod movably arranged on the mounting rack and a rotating wheel; the mounting frame is fixed on the supporting and limiting unit; the rotating wheel rotates and is arranged at one end, far away from the mounting frame, of the vertical rod, and the rotating wheel can move to be meshed with or separated from the rotating wheel assembly along the vertical rod, so that when the fixed assembly moves along the conveying unit, rotation or stop rotation of a product to be detected is controlled, and automatic uniform heating is performed when hot machining is facilitated.

Compared with the prior art, the invention has the following beneficial effects:

1. the tensioning device is simple in structure and reasonable in arrangement, the conveying unit runs along the sliding groove of the arc-shaped section, the tensioning unit is matched to adjust the tensioning force of the conveying unit, the load force of the tensioning unit on the conveying unit is reduced, and the energy consumption of the driving force of the conveying unit is further reduced;

2. the conveying unit drives the bearing unit to integrally run, and the rotating wheel component arranged in the bearing unit can drive the fixing component and the workpiece to rotate, so that the heating uniformity of the glassware during processing is further improved, the forming quality of a finished product is improved, and the structure is light and convenient to arrange;

3. the movement regulation and control of continuous and intermittent operation can be realized, and the labor intensity of workers is further reduced;

4. when the external flame gun of cooperation makes this device can transport the work piece, can not only polish the lateral wall of product, can also carry out flame drying by fire and polishing operation to the product top for the product is evenly processed, reduces the breakage rate, and has effectively reduced the energy loss of drying by fire and polishing, improves the production efficiency of product, reaches energy-conserving and material saving's effect.

Drawings

FIG. 1 is a schematic view of a main structure in embodiment 1 of the present invention;

FIG. 2 is a top view of example 1 of the present invention;

FIG. 3 is a schematic view of the matching relationship between the conveying unit and the carrying unit;

FIG. 4 is a schematic view of the main structure of the driving member of the present invention;

FIG. 5 is a schematic view of the principal structure of the tensioner of the present invention;

FIG. 6 is a schematic view of the position of the rotating member engaged with the guide bar and the hand wheel shaft according to the present invention;

FIG. 7 is a schematic view of the principal structure of the tension assembly of the present invention;

fig. 8 is a schematic view of the main structure of the rotation driving unit of the present invention.

In the above drawings:

1. a carrying unit; 11. a fixing assembly; 111. a cup holder; 112. a cup holder shaft; 113. a flame guard; 12. a rotating wheel assembly; 121. a striker plate; 122. a first rotating bearing; 123. a bearing housing; 124. a double sprocket;

2. a supporting and limiting unit; 21. a frame; 22. a blanking assembly; 23. a feeding port; 24. a blanking channel; 25. a chute;

3. a conveying unit; 32. a chain link; 31. a chain belt pin shaft; 33. a second rotary bearing; 34. a drive member;

4. a tensioner; 41. a tensioning seat; 42. a guide bar; 43. a first spring; 44. a thrust plate; 45. a first tensioning wheel; 46. a hand wheel shaft; 47. fixing the clamping plate;

5. rotating the workpiece; 51. a worm gear; 52. a first guide wheel; 53. fixing a rod; 54. a steering wheel;

6. a tension assembly; 61. a support; 62. a guide bar; 63. an adjusting handle; 64. a second spring; 65. a rotating shaft; 66. a second tensioning wheel; 67. a screw;

7. a rotation driving unit; 71. a mounting frame; 72. a vertical rod; 73. and rotating the wheel.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

As shown in fig. 1 and 2, a numerical control glassware fire polishing machine includes:

the bearing unit 1 includes: a fixed component 11 for placing a product to be tested (namely glassware) and a rotating wheel component 12 arranged at the bottom of the fixed component 11 are arranged; the fixing assembly 11 includes: a cup holder 111, a cup holder shaft 112, a flame baffle 113; the cup holder 111 is fixed on the top of the cup holder shaft 112; the cup supporting shaft 112 is rotatably connected with the conveying unit 3 and can move along with the conveying unit 3; the flame baffle 113 is arranged on the outer wall of the frame 21 and corresponds to the fixing component 11 and is used for resisting a flame gun, so that glassware can be directly contacted with flame, and meanwhile, the fixing component 11 is protected;

in actual practice, as shown in fig. 3, the number of the fixed assemblies 11 and the number of the rotating wheel assemblies 12 are in one-to-one correspondence, and the rotating wheel assemblies 12 include: a first rotating bearing 122, a bearing sleeve 123 and a double sprocket 124; the other end of the cup supporting shaft 112 vertically penetrates through the rotating bearing and the bearing sleeve 123 in sequence and then is fixedly connected with the double chain wheel 124, the bearing sleeve 123 is fixedly connected with the conveying unit 3, the cup supporting shaft 112 is driven to be effectively fixed on the conveying unit 3, and the cup supporting shaft can rotate along the rotating bearing; a baffle plate 121 is further arranged on the cup stand shaft 112 between the cup stand 111 and the conveying unit 3, and the baffle plate 121 can be used for receiving glass ware fragments cracked from a drying port so as to protect mechanical parts on the device.

As shown in fig. 1 and 2, the supporting and limiting unit 2 is provided with a sliding groove 25 for the movement of the carrying unit 1, and the sliding groove 25 is an arc-shaped segment; the method specifically comprises the following steps: the support and position limiting unit 2 includes: a frame 21 and a blanking assembly 22; the sliding grooves 25 are arranged along the outer wall of the frame 21 at intervals, and in actual operation, the sliding grooves 25 can be arranged into a section of enclosed arc-shaped structure or divided into two sections or even a plurality of sections and are positioned at the upper end and the lower end of the frame 21, wherein the two sections of the sliding grooves 25 which are opposite up and down are mainly displayed in the invention, and the transition sections positioned at the left side and the right side of the arc of the frame 21 are not provided with the sliding grooves 25; in addition, because the sliding groove 25 is arranged along the shape of the outer wall of the frame 21, one side or both sides of the frame 21 can be provided with arc-shaped sections (only a structural schematic diagram when the upper end is provided with the arc shape is shown in the figure), and compared with the original disc type design, the arc-shaped arrangement structure greatly reduces the supporting force of the tensioning device on the chain, saves the driving power load and has a compact structure; the blanking assembly 22 comprises: a feed opening 23 and a feed channel 24; the feed opening 23 is arranged at the top of the frame 21 and is enclosed by the sliding groove 25; the blanking channel 24 penetrates through the frame 21 and is communicated with the blanking port 23, and the blanking channel 24 is arranged in a furling shape with a large upper part and a small lower part, so that waste which can be directly crushed on the cup stand 111 can be transferred to a waste aggregate position from the waste.

As shown in fig. 1, 2 and 4, the conveying unit 3 is used for driving the carrying unit 1 to run in the chute 25; the method specifically comprises the following steps: the conveying unit 3 includes: a chain link 32, a chain belt pin 31, a second rotating bearing 33 and a driving piece 34; the second rotating bearing 33 is rotatably arranged on the chain link 32 through the chain belt pin shaft 31, and the outer wall of the second rotating bearing 33 can be abutted against the groove wall of the sliding groove 25, so that the conveying unit 3 is driven to integrally move along the sliding groove 25, and the supporting and positioning effects on the supporting and limiting unit 2 are achieved, so that the bearing capacity borne by the tensioning device is reduced; the driving part 34 is fixed on the frame 21 and is used for driving the connecting chain link 32, the driving part 34 is fixed at the arc transition of the left end or the right end of the frame 21 (in the figure, the driving part 34 is arranged below the frame 21), and the driving part 34 is specifically: the asynchronous motor externally connected with a power supply realizes energy supply, a speed reducer can be arranged on the power output end of the asynchronous motor, and a chain wheel arranged on the speed reducer is meshed with the chain link 32 to drive the chain link 32 to operate; when the chain wheel is driven to rotate by the driving member 34, the chain links 32 synchronously engage with the chain wheel to move along the slide groove 25, and the cup holder shafts 112 vertically penetrating the chain links 32 synchronously run along the slide groove 25, thereby achieving the effect of conveying glassware.

Because the rotation of the existing cup stand 111 is mainly an operating device which is independently set up and is driven by a chain to rotate, when the frame 21 is set too long, a plurality of idler wheel devices are required to be installed to ensure that the cup stand 111 is completely attached to the chain, and the design increases the driving torque of the rotation of the cup stand 111, for this reason, as shown in fig. 1 and 8, the cup stand is arranged at the bottom of the bearing unit 1, and the rotation driving unit 7 comprises: a mounting rack 71, a vertical rod 72 movably arranged on the mounting rack 71 and a rotating wheel 73; the mounting frame 71 is fixed on the supporting and limiting unit 2; the rotating wheel 73 is rotatably arranged at one end of the vertical rod 72 far away from the mounting frame 71 (namely, the rotating wheel 73 is arranged at the top of the vertical rod 72), and in actual operation, when the rotating wheel 73 is meshed with the rotating wheel component 12, the conveying unit 3 moves along the sliding groove to automatically drive the rotating component passing through the rotating wheel 73 to rotate, and at the moment, the workpieces on the fixed component 11 and the workpieces on the fixed component 11 rotate (the rotation driving unit 7 can adjust the position relation with the rotating wheel 73 according to the required process requirements); and the external asynchronous motor can drive the rotating wheel 73 to rotate, so that the load force of the conveying unit 3 is reduced, the autorotation is realized, the production cost is effectively saved, the structure is simple, the weight is light, and the manual operation is easy.

A tensioning unit: for adjusting the tension of the conveyor unit 3;

example 1:

as shown in fig. 1, 2 and 5, the tensioning unit is a tensioner 4, and the tensioner 4 includes: a tensioning seat 41, a guide rod 42, a first spring 43, a thrust plate 44, a first tensioning wheel 45 and a hand wheel shaft 46; the tensioning seat 41 is fixed on the frame 21; the guide rod 42 is installed on the tensioning seat 41 (the guide rod 42 is rotatably installed on the tensioning seat 41 through a bearing provided for rotation), and horizontally extends to the outside of the tensioning seat 41 to be rotatably connected with the thrust plate 44, so that when the guide rod 42 rotates, the thrust plate 44 is forced to horizontally move along the guide rod 42 to approach or depart from the tensioning seat 41; a fixed clamping plate 47 is further arranged at one end of the guide rod 42 extending out of the tensioning seat 41; the first spring 43 is sleeved on the guide rod 42 and located between the fixed clamping plate 47 and the thrust plate 44; the hand wheel shaft 46 partially extends into the tensioning seat 41 and is rotationally connected with the guide rod 42 through the rotating piece 5; in actual operation, the tensioning seat 41 with the guide rod 42 as the central axis is further provided with a cross rod for guiding the thrust plate 44, and the cross rod can move along with the thrust plate 44 so as to facilitate the horizontal movement of the thrust plate 44, and the first tensioning wheel 45 is rotatably disposed on the thrust plate 44 or between the cross rods (illustrated as being disposed on a side of the cross rod away from the thrust plate 44 in the figure).

As shown in fig. 6, the rotating member 5 includes: a worm wheel 51, a first guide wheel 52, and a fixed rod 53; the worm wheel 51 is rotatably connected with one end of the hand wheel shaft 46 extending into the tensioning seat 41; the worm wheel 51 is sleeved at the bottom end of the fixed rod 53; the other end of the fixed rod 53 extends vertically towards one end (vertically upwards) of the guide rod 42 and is fixedly connected with the first guide wheel 52; the guide bar 42 is also provided with a steering wheel 54 engaging the first guide wheel 52.

As shown in fig. 2, 3, 5, the tensioner 4 is fixed to the frame 21 toward the support stopper unit 2; the guide rod 42 vertically extends into the frame 21 and controls the thrust plate 44 to move back and forth through rotation so as to drive the first tension wheel 45 to be meshed with or separated from the chain link 32; the specific implementation mode is as follows: a thread is arranged at one end of the hand wheel shaft 46 extending into the tensioning seat 41, and the thread is meshed with the worm wheel 51, so that when the hand wheel shaft 46 is rotated, the worm wheel 51 can be driven to rotate, and the worm wheel 51 drives the fixed rod 53 and the first guide wheel 52 to rotate; the first guide wheel 52 is meshed with the steering wheel 54 to drive the guide rod 42 fixedly connected with the steering wheel 54 to rotate; at this time, the thrust plate 44 is stressed to move horizontally close to or away from the guide rod 42, and the first tensioning wheel 45 is rotatably arranged above the thrust plate 44, so that the first tensioning wheel 45 is engaged with the chain link 32, and the tensioning of the chain link 32 is controlled.

Example 2:

as shown in fig. 1, 3 and 8, the tensioning unit of the present embodiment is a tensioning assembly 6, and the present embodiment can perform tensioning control on a pulley assembly 12 through the tensioning assembly 6 based on embodiment 1 to perform an auxiliary supporting function; the tension assembly 6 includes: the device comprises a bracket 61, a guide rod 62, an adjusting handle 63, a second spring 64, a rotating shaft 65 and a second tension wheel 66; the bracket 61 is fixed on the frame 21, one end of the guide rod 62 penetrates through the bracket 61 and is fixedly connected with a screw 67, and the adjusting handle 63 is in threaded connection with the screw 67; the second spring 64 is sleeved on the guide rod 62 and positioned between the bracket 61 and the adjusting handle 63, and is used for protecting the adjusting handle 63 from driving the guide rod 62 to operate and setting a rotation threshold value; the guide rod 62 horizontally extends to the frame 21 and is rotatably connected with the rotating shaft 65; the arrangement directions of the rotating shaft 65 and the guide rod 62 are mutually vertical; the second tension pulley 66 is rotatably arranged on the rotating shaft 65;

wherein the tensioning assembly 6 is fixed to the frame 21 towards the supporting wheel assembly 12; the adjusting handle 63 reciprocates along the frame 21 by rotating the control guide rod 62 to control the second tension pulley 66 to be engaged with or disengaged from the double chain pulley 124; the specific implementation mode is as follows: the adjustment handle 63 is manually rotated to drive the guide rod 62 and the second tension pulley 66 to horizontally move leftwards or rightwards along the bracket 61, and at this time, the tension of the second spring 64 in the adjustment handle 63 is changed to change the position of the second tension pulley 66 on the guide rod 62, so that the second tension pulley 66 is engaged with or disengaged from the double chain pulley 124.

Example 3:

as shown in fig. 3 and 7, unlike embodiment 1, the tension unit of the present embodiment is a tension assembly 6, and the tension assembly 6 is fixed on the frame 21 and is disposed on the right side and the link 32 toward the second tension pulley 66; when the guide rod 62 and the second tension pulley 66 are controlled to horizontally move leftwards along the machine frame 21 by manually rotating the adjusting handle 63, the second tension pulley 66 is separated from the chain link 32; when the manual rotation of the adjusting handle 63 controls the guide rod 62 and the second tensioning wheel 66 to move rightwards along the base frame, the second tensioning wheel 66 is engaged with the chain link 32, so as to control the tensioning degree of the chain link 32 (since the structure of the tensioning assembly 6 is described in detail in embodiment 2, and the matching relationship is easy to associate, the attached drawings and the written description are not supplemented).

Example 4:

as shown in fig. 3, 5 and 6, unlike embodiment 2, the tension unit of the present embodiment is the tensioner 4, the tensioner 4 is fixed to the frame 21, and the first tension pulley 45 is horizontally disposed toward the wheel assembly 12; when the hand wheel shaft 46 is manually rotated, the driving rotating piece 5 operates to drive the guide rod 62 to rotate, and at the moment, the thrust plate 44 is stressed to horizontally move rightwards along the guide rod 62, so that the first tension wheel 45 is meshed with the double chain wheel 124 to play a role of auxiliary support; the hand wheel shaft 46 is rotated reversely again, the rotating member 5 and the guide rod 62 are driven to rotate synchronously, the thrust plate 44 is forced to move horizontally leftwards along the guide rod 62, and the first tension wheel 45 is separated from the double chain wheel 124. (since the specific structure of the tensioner 4 is described in detail in embodiment 1, and the fitting relationship is easy to associate, the description of the text and drawings will not be supplemented here).

In summary, the embodiment 1 adopted by the invention shows that a special design with one side arc protruding outwards is adopted, one end of the special design is a driving component, the other end of the special design is a tensioning unit, the conveying unit 3 is effectively supported by the tensioning unit, and compared with the design of the existing mouth dryer, the common characteristics of the mouth dryer and the conveyor are combined, the load capacity of the existing mechanical equipment is effectively reduced by 60%, and the driving energy consumption is saved; and during actual operation, the continuous and intermittent operation functions of the device can be realized by adjusting the number of the arranged autorotation driving units 7 so as to effectively adjust the device according to the actually required process, so that the device can be used for drying the top part through an external flame gun and simultaneously carrying out flame polishing on the side part of the workpiece through an additional flame gun, thereby improving the processing quality of finished products and reducing the labor intensity.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. A numerically controlled glassware fire polishing machine, comprising:

load carrying unit (1) comprising: the device is provided with a fixed component (11) for placing a product to be tested and a rotating wheel component (12) arranged at the bottom of the fixed component (11);

the supporting and limiting unit (2) is provided with a sliding groove (25) for the movement of the bearing unit (1); the sliding groove (25) is arranged into an arc-shaped section;

the conveying unit (3) is used for driving the bearing unit (1) to run in the sliding groove (25);

a tensioning unit: for adjusting the tension of the conveyor unit (3).

2. A numerical control glassware fire polishing machine as claimed in claim 1, further including a rotation driving unit (7) disposed at the bottom of said carrying unit (1),

the rotation driving unit (7) includes: the device comprises a mounting frame (71), a vertical rod (72) movably arranged on the mounting frame (71), and a rotating wheel (73);

the mounting rack (71) is fixed on the supporting and limiting unit (2); the rotating wheel (73) is rotatably arranged at one end of the vertical rod (72) far away from the mounting frame (71), and the rotating wheel (73) can move along the vertical rod (72) to be meshed with or separated from the rotating wheel component (12).

3. A numerical control glassware fire polishing machine as claimed in claim 2, in which the securing assembly (11) includes: a cup stand (111), a cup stand shaft (112) and a flame baffle (113);

the cup holder (111) is fixed on the cup holder shaft (112); the cup supporting shaft (112) is rotatably connected with the conveying unit (3); the flame baffle (113) is arranged on the outer wall of the frame (21) and corresponds to the fixing component (11);

the wheel assembly (12) comprises: a first rotating bearing (122), a bearing sleeve (123) and a double-chain wheel (124);

the other end of the cup supporting shaft (112) vertically penetrates through the rotating bearing and the bearing sleeve (123) in sequence and then is fixedly connected with a double chain wheel (124), and the bearing sleeve (123) is fixedly connected with the conveying unit (3); a material baffle plate (121) is also arranged on the cup support shaft (112) between the cup support (111) and the conveying unit (3).

4. A numerical control glassware fire polishing machine as claimed in claim 3, characterized in that the supporting and limiting unit (2) comprises: a frame (21) and a blanking assembly (22); the sliding grooves (25) are arranged along the outer wall of the rack (21) at intervals;

the blanking assembly (22) comprises: a feed opening (23) and a feed channel (24); the feed opening (23) is formed in the frame (21); the blanking channel (24) penetrates through the frame (21) and is communicated with the blanking port (23).

5. A numerical control glassware fire polishing machine as claimed in claim 4, characterized in that the delivery unit (3) comprises:

a chain link (32), a chain belt pin shaft (31), a second rotating bearing (33) and a driving piece (34);

the second rotating bearing (33) is rotatably arranged on the chain link (32) through a chain belt pin shaft (31); the driving piece (34) is fixed on the frame (21) and is used for driving and connecting a chain link (32); when the driving piece (34) drives the chain link (32) to move along the sliding groove (25), the cup supporting shaft (112) vertically penetrating through the chain link (32) synchronously runs along the sliding groove (25).

6. A numerical control glassware fire polishing machine as claimed in claim 5, characterized in that the tensioning unit is a tensioner (4), which tensioner (4) comprises: the device comprises a tensioning seat (41), a guide rod (42), a first spring (43), a thrust plate (44), a first tensioning wheel (45) and a hand wheel shaft (46);

the tensioning seat (41) is fixed on the frame (21); the guide rod (42) is installed on the tensioning seat (41) and horizontally extends to the outer side of the tensioning seat (41) to be rotatably connected with a thrust plate (44); a fixed clamping plate (47) is further arranged at one end of the guide rod (42) extending out of the tensioning seat (41); the first spring (43) is sleeved on the guide rod (42) and positioned between the fixed clamping plate (47) and the thrust plate (44); the first tension wheel (45) is rotationally arranged on the thrust plate (44); the hand wheel shaft (46) partially extends into the tensioning seat (41) and is connected with the guide rod (42) through the rotating piece (5) in a rotating mode.

7. A numerical control glassware fire polishing machine as claimed in claim 6, in which the rotating member (5) comprises: a worm wheel (51), a first guide wheel (52) and a fixed rod (53);

the worm wheel (51) is rotatably arranged on one end of the hand wheel shaft (46) extending into the tensioning seat (41); the worm wheel (51) is sleeved on one end of the fixed rod (53); the other end of the fixed rod (53) vertically extends towards one end of the guide rod (42) and is fixedly connected with a first guide wheel (52); the guide rod (42) is also provided with a steering wheel (54) which is meshed with the first guide wheel (52).

8. A numerical control glassware fire polishing machine as claimed in claim 5, in which the tensioning unit is a tensioning assembly (6), the tensioning assembly (6) including: the device comprises a bracket (61), a guide rod (62), an adjusting handle (63), a second spring (64), a rotating shaft (65) and a second tension wheel (66);

the bracket (61) is fixed on the frame (21); one end of the guide rod (62) penetrates through the bracket (61) and is fixedly connected with a screw rod (67); the adjusting handle (63) is in threaded connection with a screw rod (67); the second spring (64) is sleeved on the guide rod (62) and is positioned between the bracket (61) and the adjusting handle (63); the guide rod (62) horizontally extends to the rack (21) and is rotatably connected with the rotating shaft (65); the arrangement directions of the rotating shaft (65) and the guide rod (62) are mutually vertical; the second tension wheel (66) is rotatably arranged on the rotating shaft (65).

9. Numerical control glassware fire polishing machine as claimed in claim 7, characterized in that said tensioners (4) are fixed to the frame (21) and are arranged towards the supporting and limiting unit (2) or/and the rotating wheel assembly (12); the guide rod (42) vertically extends into the frame (21) and controls the thrust plate (44) to move in a reciprocating manner through rotation so as to drive the first tension wheel (45) to be meshed with or separated from the chain link (32) or/and the double chain wheel (124).

10. Numerical control glassware fire polishing machine as claimed in claim 8, characterized in that said tensioning unit (6) is fixed to the frame (21) and is arranged towards the supporting and restraining unit (2) and/or the rotating wheel unit (12); the adjusting handle (63) reciprocates along the rack (21) by rotating the control guide rod (62) so as to control the second tension wheel (66) to be meshed with or separated from the chain link (32) or/and the double chain wheel (124).