CN113696459B - Machining device and machining method for double-sided tooth synchronous belt - Google Patents
Machining device and machining method for double-sided tooth synchronous belt Download PDFInfo
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- CN113696459B CN113696459B CN202110979903.9A CN202110979903A CN113696459B CN 113696459 B CN113696459 B CN 113696459B CN 202110979903 A CN202110979903 A CN 202110979903A CN 113696459 B CN113696459 B CN 113696459B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/46—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29L2031/00—Other particular articles
- B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
- B29L2031/7094—Driving belts
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Abstract
The invention discloses a processing device and a processing method of a double-sided tooth synchronous belt, wherein the processing device comprises a frame, an upper die fixing plate and a lower die fixing plate which are oppositely arranged are arranged on the frame, and a lower tooth plate is fixedly arranged on the lower die fixing plate; the upper toothed plate and the lower toothed plate are respectively provided with a toothed structure on opposite surfaces; a movable block is fixed above the upper toothed plate, a movable groove is formed in the upper die fixing plate, and the movable block is arranged in the movable groove and can move in the movable groove; an adjusting screw is arranged on the side face of the upper toothed plate, one end of the adjusting screw is in threaded fit with the upper toothed plate, a rotating handle is arranged at the other end of the adjusting screw, and the adjusting screw drives the upper toothed plate to horizontally displace relative to the lower toothed plate. According to the invention, the adjusting screw is adopted to drive the upper toothed plate to horizontally move, and the scale on the dial can more accurately adjust the dislocation distance between the upper fluted disc and the lower fluted disc, so that the requirement of changing the dislocation distance for a plurality of times in the pressing process of the reciprocal prime synchronous belt is met, and the processing cost is reduced.
Description
Technical Field
The invention belongs to the technical field of synchronous belts, and particularly relates to a processing device and a processing method of a double-sided tooth synchronous belt.
Background
The double-sided tooth synchronous belt is widely used by the industries of machinery, textile, precision instruments, petrochemical industry, communication cables and the like because of the characteristics of light structure, no slip differential meshing transmission, low noise and the like. The transmission system not only integrates the advantages of gear transmission, chain transmission and belt transmission, overcomes the defects of slipping, elongation and the like of other transmission belts, forms a unique transmission mode, but also has the advantages of constant speed ratio, large speed range, compact structure, farm multi-shaft transmission, oil resistance, moisture resistance, no need of lubrication and the like. The development of the double-sided tooth synchronous belt is successful, and the superiority of the double-sided tooth synchronous belt is reflected in the fields that one belt is required to be used for transmission and the directions are opposite, or the installation position is required to be particularly compact, or other transmission requirements such as main transmission and auxiliary transmission linkage are high; superstrong flexure properties, ultra high tensile strength, accurate engagement, low signal to noise ratio, and the like.
The pitch and the tooth form of the double-sided tooth synchronous belt are different from each other on the inner surface and the outer surface in order to drive the parts with different structures. In general, when producing a double-sided toothed synchronous belt, since the synchronous belt is in a complete ring shape, a pressing mold needs to press in batches, and how to press in batches needs to consider the corresponding relation between the number of internal teeth and the number of external teeth. If the common factors are present in the numbers of the internal teeth and the external teeth, for example, 88 for the internal teeth and 52 for the external teeth, and 4 for the external teeth, the press can be completed in 4 times by using the dies of the upper die 13 and the lower die 22, and there is no problem of misalignment. However, there are cases where the number of inner and outer teeth is prime, and the synchronous belt does not cause vibration or noise due to resonance effects, but only one inner tooth and outer tooth are at the same starting point, and all the other teeth are offset. That is, when the first pressing is performed, after the first inner and outer teeth are aligned and pressed, the starting points of the inner and outer teeth pressed next time are not aligned, and an aligned die cannot be used, so that a die with the same size can be selected by staggering the upper and lower teeth according to the difference between the inner and outer teeth. For example, a timing belt having 92 internal teeth and 55 external teeth, in which the lower die presses 23 internal teeth each time, and the upper die presses 13.75 external teeth each time, that is, the upper die and the lower die need to be offset by 0.25 external teeth each time, in 4 cases. Therefore, a plurality of sets of dies with staggered teeth numbers of the upper die and the lower die are needed to be used for pressing the synchronous belt, the whole synchronous belt processing process is complex, and the whole processing cost is greatly increased.
Disclosure of Invention
The invention aims to provide a processing device and a processing method for a double-sided tooth synchronous belt, which can change the relative horizontal positions of an upper die and a lower die and meet the whole processing requirement of a reciprocal prime synchronous belt.
For this purpose, the first technical scheme of the invention is as follows: the machining device for the double-sided tooth synchronous belt comprises a frame, wherein an upper die fixing plate and a lower die fixing plate which are oppositely arranged are arranged on the frame, and a lower tooth plate is fixedly arranged on the lower die fixing plate; the upper toothed plate and the lower toothed plate are respectively provided with a toothed structure on opposite surfaces;
the method is characterized in that: a movable block is fixed above the upper toothed plate, a movable groove is formed in the upper die fixing plate, and the movable block is arranged in the movable groove and can move in the movable groove; an adjusting screw is arranged on the side surface of the upper toothed plate, one end of the adjusting screw is in threaded fit with the upper toothed plate, and the other end of the adjusting screw is provided with a rotating handle; a dial is fixed on the adjusting screw, and scales are arranged on the circumference of the dial; the adjusting screw drives the upper toothed plate to horizontally displace relative to the lower toothed plate.
Preferably, a pressing component for driving the upper toothed plate to move up and down relative to the lower toothed plate is arranged on the frame.
Another technical scheme is as follows: a processing method of a double-sided tooth synchronous belt uses the processing device to place the synchronous belt with pressed internal teeth on a working position between an upper toothed plate and a lower toothed plate, and the internal teeth are meshed with a toothed structure of the lower toothed plate; when in first pressing, the upper toothed plate is aligned with the starting point end of the lower toothed plate, and the upper toothed plate presses down the synchronous belt, so that external teeth are formed outside the synchronous belt; then the upper toothed plate moves upwards, and the pressed synchronous belt part is moved out of the working position, so that the unpressed synchronous belt part enters the working position; judging whether the upper toothed plate needs to be adjusted according to the numerical relation between the inner teeth and the outer teeth, calculating the distance to be moved, then rotating a rotating handle according to the scale on the dial, and adjusting the screw to push the upper toothed plate to horizontally displace relative to the lower toothed plate, wherein the horizontal displacement distance is consistent with the dislocation distance of the inner teeth and the outer teeth; after the upper toothed plate is adjusted, the upper toothed plate continuously presses down the synchronous belt to form external teeth, and the synchronous belt is pushed in the same way and repeatedly pressed until the synchronous belt is formed.
Preferably, the number of internal teeth is M, the number of external teeth is N, M, N are prime numbers, b is 3 or 4 or 5 on the assumption that b times of pressing of the synchronous belt is performed, when M is a multiple of b, the number of teeth of the lower toothed plate is M/b, N cannot be divided by b, N is N after N/b is rounded, and the number of teeth of the upper toothed plate is n+1; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after that, each pressing, the upper toothed plate needs to be moved backwards by (n+1-N/b) external tooth lengths, and so on, and each pressing, the upper toothed plate needs to be moved backwards by (n+1-N/b) external tooth lengths; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
Preferably, the number of internal teeth is M, the number of external teeth is N, M, N are prime numbers, b is 3 or 4 or 5 on the assumption that the synchronous belt is pressed for b times, when N is a multiple of b, the number of teeth of the upper toothed plate is N/b, M cannot divide b completely, and when M/b is M after rounding, the number of teeth of the lower toothed plate is m+1; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after that, every time pressing, the upper toothed plate needs to move forward by (m+1-M/b) internal tooth lengths; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
Preferably, the number of internal teeth is M, the number of external teeth is N, M, N are prime numbers, b is 3 or 4 or 5 on the assumption that b times of pressing the synchronous belt are performed, when M, N cannot divide b completely, the number of teeth of the lower toothed plate is m+1 after M/b is rounded; setting the N/b as N after rounding, and setting the number of teeth of the upper toothed plate as n+1; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after each pressing, theoretically, the upper toothed plate needs to be moved backwards by (n+1-N/b) external tooth lengths, the lower toothed plate needs to be moved backwards by (m+1-M/b) internal tooth lengths, and when the lower toothed plate is fixed, the upper toothed plate needs to be moved [ (m+1-M/b) ×internal tooth lengths- (n+1-N/b) ×external tooth lengths ], positive numbers mean that the upper toothed plate is moved forwards, and negative numbers mean that the upper toothed plate is moved backwards; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
Preferably, the number of internal teeth is M, the number of external teeth is N, a common factor a exists in M, N, a is 3 or 4 or 5, the number of teeth of the lower toothed plate is M/a, and the number of teeth of the upper toothed plate is N/a; and during each pressing, the starting ends of the upper toothed plate and the lower toothed plate are aligned.
The upper die fixing plate and the lower die fixing plate are both fixed on the frame, the lower toothed plate is used for positioning the synchronous belt, the internal teeth of the synchronous belt are pressed in advance, and the lower toothed plate is meshed with the internal teeth for positioning when the external teeth are processed; after the synchronous belt is put, the pressing component can press the upper toothed plate downwards, so that external teeth are pressed; one end of the adjusting screw is in threaded fit with the upper toothed plate, a rotating handle is arranged at the other end of the adjusting screw, and when the rotating handle is rotated, the adjusting screw rotates and pushes the upper toothed plate to horizontally move in the movable groove through the movable block, so that the upper toothed plate and the lower toothed plate are dislocated; the scale on the circumference of the scale disc can enable the movement of the upper toothed plate relative to the lower toothed plate to be more accurate.
According to the invention, the adjusting screw is adopted to drive the upper toothed plate to horizontally move, and the scale on the dial can more accurately adjust the dislocation distance between the upper fluted disc and the lower fluted disc, so that the requirement of changing the dislocation distance for a plurality of times in the pressing process of the reciprocal prime synchronous belt is met, and the processing cost is reduced.
Drawings
The following is a further detailed description of embodiments of the invention with reference to the drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic gear diagram of 88 internal teeth and 52 external teeth;
fig. 4 is a schematic diagram of gears with 92 internal teeth and 55 external teeth.
Marked in the figure as: the upper die fixing plate 1, the movable groove 11, the lower die fixing plate 2, the lower toothed plate 3, the upper toothed plate 4, the movable block 5, the adjusting screw 6, the rotary handle 7, the dial 8, the synchronous belt 9, the internal teeth 10 and the external teeth 12.
Detailed Description
See the drawings. The synchronous belt processing device comprises a frame, wherein an upper die fixing plate 1 and a lower die fixing plate 2 which are oppositely arranged are arranged on the frame, and a lower toothed plate 3 is fixedly arranged on the lower die fixing plate 2; the device also comprises an upper toothed plate 4, wherein tooth-shaped structures are arranged on the opposite surfaces of the upper toothed plate 4 and the lower toothed plate 3; a movable block 5 is fixed above the upper toothed plate 4, a movable groove 11 is arranged on the upper die fixed plate 1, and the movable block 5 is arranged in the movable groove 11 and can move in the movable groove 11; the side surface of the upper toothed plate 4 is fixedly provided with a connecting block, the connecting block is provided with a threaded hole, one end of an adjusting screw rod 6 is matched with the threaded hole on the connecting block, the other end of the adjusting screw rod is provided with a rotating handle 7, and the adjusting screw rod pushes the upper toothed plate 4 to horizontally move through the connecting block; a dial 8 is fixed on the adjusting screw 6, and scales are arranged on the circumference of the dial; the adjusting screw 6 drives the upper toothed plate 4 to horizontally displace relative to the lower toothed plate 3. The rack is provided with a pressing component for driving the upper toothed plate 4 to move up and down relative to the lower toothed plate 3, and after the synchronous belt is placed in place, the pressing component can enable the upper toothed plate 4 to press down to form external teeth.
The double-sided tooth synchronous belt is divided into two cases, wherein one case is that the number of the inner teeth and the number of the outer teeth are common factors, and the other case is that the number of the inner teeth and the number of the outer teeth are prime numbers.
Example 1
As shown in fig. 3, when the number of internal teeth of the synchronous belt is 88 and the number of external teeth is 52, the two teeth have a common factor of 4, that is, 4 central coincident points a, so that the pressing can be completed in 4 times by using the dies of the upper die 13 teeth and the lower die 22 teeth, and each time of pressing, the starting ends of the upper toothed plate and the lower toothed plate are aligned.
Placing the timing belt 9, on which the internal teeth 10 have been pressed, on a working position between the upper toothed plate 4 and the lower toothed plate 3, the internal teeth 10 meshing with the toothed structure of the lower toothed plate 3; during the first pressing, the upper toothed plate 4 is aligned with the starting point end of the lower toothed plate 3, and the upper toothed plate 4 presses down the synchronous belt, so that the outer teeth 12 are formed outside the synchronous belt; then the upper toothed plate 4 moves upwards, and the pressed synchronous belt part moves out of the working position, so that the unpressed synchronous belt part enters the working position; and repeatedly pressing until the synchronous belt is formed.
Example two
As shown in fig. 4, when the number of internal teeth of the synchronous belt is 92 and the number of external teeth is 55, the internal teeth are prime numbers, namely, only one point B exists, the internal teeth are overlapped with the central line of the external teeth, the synchronous belt is pressed for 4 times, the number of teeth of the lower toothed plate is 23, 55/4=13.75 of the external teeth are 13 after rounding, and the number of teeth of the upper toothed plate is 14; the first pressing is performed, and the point B of the upper toothed plate is aligned with the point B of the lower toothed plate; after that, each pressing, the upper toothed plate needs to be moved backwards by 0.25 external tooth length, and so on, and each pressing, the upper toothed plate needs to be moved backwards by 0.25 external tooth length; that is to say, the first time the upper and lower toothed plates are aligned at the point B; the second time, the starting point of the lower toothed plate is positioned at the point C1, the starting point of the upper toothed plate is positioned at the point D1, and the difference between the starting point and the starting point is 0.25 external tooth length; thirdly, the starting point of the lower toothed plate is positioned at the point C2, the starting point of the upper toothed plate is positioned at the point D2, and the difference between the starting point and the starting point is 0.5 external tooth length; fourth time, the starting point of the lower toothed plate is positioned at the C3 point, the starting point of the upper toothed plate is positioned at the D3 point, the difference between the starting point and the starting point is 0.75 external tooth length, and the direction of the pressing starting point of the synchronous belt is the front, and the direction of the pressing starting point of the synchronous belt is the back.
Placing the timing belt 9, on which the internal teeth 10 have been pressed, on a working position between the upper toothed plate 4 and the lower toothed plate 3, the internal teeth 10 meshing with the toothed structure of the lower toothed plate 3; during the first pressing, the upper toothed plate 4 is aligned with the starting point end of the lower toothed plate 3, and the upper toothed plate 4 presses down the synchronous belt, so that the outer teeth 12 are formed outside the synchronous belt; then the upper toothed plate 4 moves upwards, and the pressed synchronous belt part moves out of the working position, so that the unpressed synchronous belt part enters the working position; rotating the rotating handle according to the scale on the dial, and pushing the upper toothed plate to move backwards by 0.25 external tooth length by the adjusting screw; after the upper toothed plate is adjusted, the upper toothed plate continuously presses down the synchronous belt to form the external teeth 12, and the outer teeth are pushed in the same way, and the pressing is repeated until the synchronous belt is formed.
Example III
When the number of the internal teeth of the synchronous belt is 91 and the number of the external teeth of the synchronous belt is 56, the internal teeth and the external teeth are prime numbers, the synchronous belt is pressed for 4 times, the number of teeth of the upper toothed plate is 14, 91/4=22.75 of the internal teeth, the number of teeth of the lower toothed plate is 23 after rounding; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after each pressing, the internal teeth are pressed by 0.25 more, in theory, the lower toothed plate is moved backwards by 0.25 internal tooth length, but the lower toothed plate is fixed, so that the upper toothed plate needs to be moved forwards by 0.25 internal tooth length relative to the lower toothed plate, and the upper toothed plate needs to be moved forwards by 0.25 internal tooth length each time of pressing; that is, the first upper and lower toothed plates are aligned, the second upper and lower toothed plates differ by 0.25 internal tooth length, the third upper and lower toothed plates differ by 0.5 internal tooth length, and the fourth upper and lower toothed plates differ by 0.75 internal tooth length, where the direction of the start point of the hold-in range pressing is the front, and vice versa.
Placing the timing belt 9, on which the internal teeth 10 have been pressed, on a working position between the upper toothed plate 4 and the lower toothed plate 3, the internal teeth 10 meshing with the toothed structure of the lower toothed plate 3; during the first pressing, the upper toothed plate 4 is aligned with the starting point end of the lower toothed plate 3, and the upper toothed plate 4 presses down the synchronous belt, so that the outer teeth 12 are formed outside the synchronous belt; then the upper toothed plate 4 moves upwards, and the pressed synchronous belt part moves out of the working position, so that the unpressed synchronous belt part enters the working position; rotating the rotating handle according to the scale on the dial, and pushing the upper toothed plate to move forwards by 0.25 internal tooth length by the adjusting screw; after the upper toothed plate is adjusted, the upper toothed plate continuously presses down the synchronous belt to form the external teeth 12, and the outer teeth are pushed in the same way, and the pressing is repeated until the synchronous belt is formed.
Example IV
When the number of the internal teeth of the synchronous belt is 91 and the number of the external teeth of the synchronous belt is 55, the internal teeth and the external teeth are prime numbers, the synchronous belt is pressed for 4 times, the 55/4=13.75 of the external teeth is 13 after rounding, the number of the teeth of the upper toothed plate is 14, the 91/4=22.75 of the internal teeth is 22 after rounding, and the number of the teeth of the lower toothed plate is 23; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after each pressing, theoretically, the upper toothed plate needs to be moved backwards by 0.25 external tooth length, the lower toothed plate needs to be moved backwards by 0.25 internal tooth length, and when the lower toothed plate is fixed, the upper toothed plate needs to be moved (0.25 internal tooth length-0.25 external tooth length), positive number means that the upper toothed plate is moved forwards, and negative number means that the upper toothed plate is moved backwards; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
Claims (3)
1. The machining device comprises a frame, wherein an upper die fixing plate and a lower die fixing plate which are oppositely arranged are arranged on the frame, and a lower toothed plate is fixedly arranged on the lower die fixing plate; the upper toothed plate and the lower toothed plate are respectively provided with a toothed structure on opposite surfaces;
a movable block is fixed above the upper toothed plate, a movable groove is formed in the upper die fixing plate, and the movable block is arranged in the movable groove and can move in the movable groove; an adjusting screw is arranged on the side surface of the upper toothed plate, one end of the adjusting screw is in threaded fit with the upper toothed plate, and the other end of the adjusting screw is provided with a rotating handle; a dial is fixed on the adjusting screw, and scales are arranged on the circumference of the dial; the adjusting screw drives the upper toothed plate to horizontally displace relative to the lower toothed plate;
when in processing, the synchronous belt with the pressed internal teeth is placed on a working position between an upper toothed plate and a lower toothed plate, and the internal teeth are meshed with the toothed structure of the lower toothed plate; when in first pressing, the upper toothed plate is aligned with the starting point end of the lower toothed plate, and the upper toothed plate presses down the synchronous belt, so that external teeth are formed outside the synchronous belt; then the upper toothed plate moves upwards, and the pressed synchronous belt part is moved out of the working position, so that the unpressed synchronous belt part enters the working position; judging whether the upper toothed plate needs to be adjusted according to the numerical relation between the inner teeth and the outer teeth, calculating the distance to be moved, then rotating a rotating handle according to the scale on the dial, and adjusting the screw to push the upper toothed plate to horizontally displace relative to the lower toothed plate, wherein the horizontal displacement distance is consistent with the dislocation distance of the inner teeth and the outer teeth; after the upper toothed plate is adjusted, the upper toothed plate continuously presses down the synchronous belt to form external teeth, and the synchronous belt is pushed in the same way and repeatedly pressed until the synchronous belt is formed;
the method is characterized in that:
setting the number of internal teeth as M, the number of external teeth as N, M, N as prime numbers, and assuming that b times of pressing the synchronous belt is divided, b is 3 or 4 or 5, when M is a multiple of b, the number of teeth of the lower toothed plate is M/b, N cannot divide b completely, N is N after N/b is rounded, and the number of teeth of the upper toothed plate is n+1; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; every time after that, the upper toothed plate needs to be moved backwards by (n+1-N/b) external tooth lengths, and so on; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
2. The machining device comprises a frame, wherein an upper die fixing plate and a lower die fixing plate which are oppositely arranged are arranged on the frame, and a lower toothed plate is fixedly arranged on the lower die fixing plate; the upper toothed plate and the lower toothed plate are respectively provided with a toothed structure on opposite surfaces;
a movable block is fixed above the upper toothed plate, a movable groove is formed in the upper die fixing plate, and the movable block is arranged in the movable groove and can move in the movable groove; an adjusting screw is arranged on the side surface of the upper toothed plate, one end of the adjusting screw is in threaded fit with the upper toothed plate, and the other end of the adjusting screw is provided with a rotating handle; a dial is fixed on the adjusting screw, and scales are arranged on the circumference of the dial; the adjusting screw drives the upper toothed plate to horizontally displace relative to the lower toothed plate;
when in processing, the synchronous belt with the pressed internal teeth is placed on a working position between an upper toothed plate and a lower toothed plate, and the internal teeth are meshed with the toothed structure of the lower toothed plate; when in first pressing, the upper toothed plate is aligned with the starting point end of the lower toothed plate, and the upper toothed plate presses down the synchronous belt, so that external teeth are formed outside the synchronous belt; then the upper toothed plate moves upwards, and the pressed synchronous belt part is moved out of the working position, so that the unpressed synchronous belt part enters the working position; judging whether the upper toothed plate needs to be adjusted according to the numerical relation between the inner teeth and the outer teeth, calculating the distance to be moved, then rotating a rotating handle according to the scale on the dial, and adjusting the screw to push the upper toothed plate to horizontally displace relative to the lower toothed plate, wherein the horizontal displacement distance is consistent with the dislocation distance of the inner teeth and the outer teeth; after the upper toothed plate is adjusted, the upper toothed plate continuously presses down the synchronous belt to form external teeth, and the synchronous belt is pushed in the same way and repeatedly pressed until the synchronous belt is formed;
the method is characterized in that:
the number of the internal teeth is M, the number of the external teeth is N, the M, N is prime, the number of the external teeth is 3 or 4 or 5 when the synchronous belt is pressed for b times, when N is a multiple of b, the number of teeth of the upper toothed plate is N/b, M cannot divide b completely, and when M/b is M after rounding, the number of teeth of the lower toothed plate is m+1; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after that, every time pressing, the upper toothed plate needs to move forward by (m+1-M/b) internal tooth lengths; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
3. The machining device comprises a frame, wherein an upper die fixing plate and a lower die fixing plate which are oppositely arranged are arranged on the frame, and a lower toothed plate is fixedly arranged on the lower die fixing plate; the upper toothed plate and the lower toothed plate are respectively provided with a toothed structure on opposite surfaces;
a movable block is fixed above the upper toothed plate, a movable groove is formed in the upper die fixing plate, and the movable block is arranged in the movable groove and can move in the movable groove; an adjusting screw is arranged on the side surface of the upper toothed plate, one end of the adjusting screw is in threaded fit with the upper toothed plate, and the other end of the adjusting screw is provided with a rotating handle; a dial is fixed on the adjusting screw, and scales are arranged on the circumference of the dial; the adjusting screw drives the upper toothed plate to horizontally displace relative to the lower toothed plate;
when in processing, the synchronous belt with the pressed internal teeth is placed on a working position between an upper toothed plate and a lower toothed plate, and the internal teeth are meshed with the toothed structure of the lower toothed plate; when in first pressing, the upper toothed plate is aligned with the starting point end of the lower toothed plate, and the upper toothed plate presses down the synchronous belt, so that external teeth are formed outside the synchronous belt; then the upper toothed plate moves upwards, and the pressed synchronous belt part is moved out of the working position, so that the unpressed synchronous belt part enters the working position; judging whether the upper toothed plate needs to be adjusted according to the numerical relation between the inner teeth and the outer teeth, calculating the distance to be moved, then rotating a rotating handle according to the scale on the dial, and adjusting the screw to push the upper toothed plate to horizontally displace relative to the lower toothed plate, wherein the horizontal displacement distance is consistent with the dislocation distance of the inner teeth and the outer teeth; after the upper toothed plate is adjusted, the upper toothed plate continuously presses down the synchronous belt to form external teeth, and the synchronous belt is pushed in the same way and repeatedly pressed until the synchronous belt is formed;
the method is characterized in that:
assuming that the number of internal teeth is M, the number of external teeth is N, M, N are prime numbers, assuming that b times of pressing the synchronous belt is divided, b is 3 or 4 or 5, when M, N cannot divide b completely, M is M after M/b is rounded, and the number of teeth of the lower toothed plate is m+1; setting the N/b as N after rounding, and setting the number of teeth of the upper toothed plate as n+1; during the first pressing, the starting point ends of the upper toothed plate and the lower toothed plate are aligned; after each pressing, theoretically, the upper toothed plate needs to be moved backwards by (n+1-N/b) external tooth lengths, the lower toothed plate needs to be moved backwards by (m+1-M/b) internal tooth lengths, and when the lower toothed plate is fixed, the upper toothed plate needs to be moved [ (m+1-M/b) ×internal tooth lengths- (n+1-N/b) ×external tooth lengths ], positive numbers mean that the upper toothed plate is moved forwards, and negative numbers mean that the upper toothed plate is moved backwards; here, the direction of the pressing start point of the synchronous belt is the front, and vice versa.
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