Method for processing a roller of a drum mixer

Abstract

The application belongs to the technical field of sintering production, and discloses a cylinder mixer roller processing method. The cylinder mixer roller processing method comprises the following steps: S10, measuring the round run-out of the discharging roller table; S20, marking the wave crest position on the end face of the discharging roller table; S30, placing the turning tool assembly on the circumference of the discharging roller table; S40, under the condition of normal start-up production, the turning tool feeds and moves along the axial direction of the cylinder body to process the outer periphery of the discharging roller table; S50, observing whether the deviation between the turning mark of the first time and the marked wave crest position is within the preset range, if yes, continue to feed and turn, and the vibration acceleration of the bearing seat is measured each time until the maximum value of the vibration acceleration is within the tolerance range; if no, execute S60; S60, fine-tuning the position of the turning tool in the transverse direction, and re-turning the outer periphery of the discharging roller table until the deviation between the turning mark and the wave crest position is within the preset range. The method can solve the problem of the run-out of the discharging end of the cylinder mixer.

Description

Technical Field

[0001] The invention relates to the technical field of sintering production, in particular to a method for processing a roller ring of a cylindrical mixer. Background Art

[0002] A drum mixer is a commonly used mixing device, widely used for mixing powders, granules, and viscous materials in the pharmaceutical, chemical, food, and cosmetic industries. It operates by placing materials into a drum, which rotates and tumbles them continuously to achieve mixing. The advantages of a drum mixer include excellent mixing performance, simple operation, easy cleaning, and no damage or contamination to the materials. Furthermore, drum mixers can utilize different drum structures and mixing methods to optimize mixing performance, tailored to the specific material characteristics.

[0003] After a certain number of years of use, the discharge end of the drum of the drum mixer may experience a gradual increase in vibration. Due to the large size of the drum mixer and the high procurement cost, replacing the drum after this situation not only incurs a large expense, but also requires the drum mixer to be shut down for several days for replacement. In general, there is only one drum mixer in a factory. If it is shut down for replacement, it will cause production delays and cause large losses.

[0004] After the above situation occurred, in order to avoid major replacement of the cylinder, the manufacturer replaced the feed roller, discharge roller, feed roller and discharge roller, but still failed to solve the problem of increased vibration at the discharge end.

[0005] Therefore, it is urgent to design a cylindrical mixer roller processing method to solve the above problems. Summary of the Invention

[0006] One object of the present invention is to provide a method for processing roller rings of a cylindrical mixer, which can process the discharge roller without replacing or damaging the cylinder, thereby solving the problem of the discharge end of the cylindrical mixer jumping.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A method for processing roller rings of a cylindrical mixer, wherein the cylindrical mixer comprises a cylindrical body, a discharge roller and a feed roller arranged outside the cylindrical body at intervals along the circumference of the cylindrical body, two discharge rollers, and two feed rollers. The two discharge rollers are used to support the discharge rollers and are both pivotally connected to the bearing seat. The two feed rollers are used to support the feed rollers and are both pivotally connected to the bearing seat. The cylindrical body can be driven to rotate by a drive system. The discharge end of the cylindrical body has an excessive runout. The method for processing roller rings of the cylindrical mixer comprises:

[0009] S10: Under no-load conditions, measure the circular runout of the discharge roller;

[0010] S20: marking the peak position on the end surface of the discharge roller table when the roundness of the discharge roller table is wavy;

[0011] S30: placing a turning tool assembly around the discharge roller table, the turning tool assembly comprising a turning tool, the turning tool being movable along the axial direction of the cylinder;

[0012] S40: in the case of normal production, the turning tool is fed and moved along the axial direction of the cylinder to machine the outer periphery of the discharge roller table;

[0013] S50: observing whether the deviation between the turning mark of the first turning and the marked peak position of the discharge roller table is within a preset range, if yes, the turning tool is continuously fed and turned, the vibration acceleration of the bearing seat is measured each time the turning is performed until the maximum value of the vibration acceleration is within the tolerance range; if not, S60 is performed;

[0014] S60: after the position of the turning tool in the transverse direction is finely adjusted, the outer periphery of the discharge roller table is re-turned until the deviation between the turning mark and the peak position is within the preset range after a certain fine adjustment, the turning tool is continuously fed and turned, the vibration acceleration of the bearing seat is measured each time the turning is performed until the maximum value of the vibration acceleration is within the tolerance range.

[0015] As a preferred solution, in S60, the fine adjustment distance of the turning tool in the transverse direction is the deviation between the peak position and the turning mark.

[0016] As a preferred solution, the preset range is 0mm-50mm.

[0017] As a preferred solution, in S50, the turning start position is marked on the end surface of the discharge roller table during the first turning; in S60, the discharge roller table is rotated to make the marked position face the turning tool before the fine adjustment of the turning tool.

[0018] As a preferred solution, the roundness of the discharge roller table is measured by using a dial indicator.

[0019] As a preferred solution, in S10, the cylinder is driven by a micro-drive system.

[0020] As a preferred solution, the turning tool assembly is located between two discharge rollers.

[0021] As a preferred solution, the turning tool assembly comprises a base and a turning tool, the base is provided with a walking driving element to drive the turning tool to move on the base, and S30 comprises:

[0022] S31: placing the turning tool assembly between the two discharge rollers so that the turning tool is located at the bottom of the circumference of the discharge roller;

[0023] S32: Adjust the motion trajectory of the turning tool to be parallel to the axis of the above-mentioned discharge roller.

[0024] As a preferred solution, the above S32 is specifically as follows:

[0025] S321: First, place the turning tool under one end of the discharge roller, and measure the gap value a between the top of the turning tool and the discharge roller; then drive the turning tool to the bottom of the other end of the discharge roller by the travel drive, and measure the gap value b between the top of the turning tool and the discharge roller;

[0026] S322: When the absolute value of ab is greater than the preset value, a gasket is added to the bottom of the base at the end with the larger value, or a gasket is reduced at the bottom of the base at the end with the smaller value; repeat S321 until the absolute value of ab is less than the preset value, and fix the base on the base of the cylindrical mixer.

[0027] As a preferred solution, when the discharge roller is being turned, the lubrication and oiling system of the drum mixer is stopped.

[0028] The beneficial effects of the present invention are:

[0029] The present invention provides a method for processing the roller ring of a cylindrical mixer. By measuring the circular runout of the discharge roller and recording the position of the wave peak, the cause of the runout of the discharge end of the cylindrical mixer is found. When the discharge roller is turned, a small amount of cutting is first fed. At this time, since the outer periphery of the discharge roller is wavy, the turning marks of the outer periphery of the discharge roller turned by the first turn are discontinuous. In order to ensure that the turning position is the position of the wave peak, the turning marks are compared with the marked wave peak position. If the deviation is large, it means that the position of the turning from this position is not the wave peak, and the turning position is too low. If there is an error in the position, the position of the turning tool is adjusted horizontally according to the deviation value. The formal turning is carried out only when the deviation is within the preset range. It is ensured that when turning officially starts, turning is carried out from the peak position downwards, and then ensuring that when the feed depth is gradually increased, the discharge roller gradually tends to be circular. After many passes, the vibration acceleration of the bearing seat is gradually reduced through detection, which shows that the discharge roller gradually tends to be circular. The problem of excessive vibration at the discharge end of the drum mixer is solved without replacing parts, which greatly saves costs and does not require long-term shutdown, and will not cause losses to production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 1 is a schematic structural diagram of a drum mixer provided by an embodiment of the present invention;

[0031] Figure 2It is a structural schematic diagram of a drum mixer and a turning tool assembly provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 10. Cylinder; 20. Discharge roller; 30. Feed roller; 40. Discharge roller; 50. Feed roller; 60. Bearing seat; 200. Dial indicator;

[0034] 300, turning tool assembly; 310, base; 320, turning tool; 330, movable tool holder; 400, base. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0036] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0039] Example 1

[0040] like Figure 1 As shown, the drum mixer includes a drum 10, a discharge roller 20 and a feed roller 30 spaced apart around the drum 10, two discharge rollers 40, and two feed rollers 50. The two discharge rollers 40 support the discharge roller 20 and are pivotally connected to a bearing block 60. The two feed rollers 50 support the feed roller 30 and are pivotally connected to the bearing block 60. The drum 10 can be driven to rotate by a drive system. After the drum mixer has been used for a period of time, excessive runout has occurred at the discharge end.

[0041] This embodiment provides a method for processing roller rings of a cylindrical mixer, which can process the discharge roller 20 without replacing or damaging the cylinder 10, thereby solving the problem of the discharge end of the cylindrical mixer jumping.

[0042] Specifically, the above-mentioned drum mixer roller processing method includes:

[0043] S10: Measure the circular runout of the discharge roller 20 in the no-load state. Since it is difficult to control the amount of each rotation when measuring the circular runout in a fully loaded state (load weight of hundreds of tons), this step is performed in the no-load state.

[0044] S20: The discharge roller 20 has a wave-like circular runout, and the peak position is marked on the end surface of the discharge roller 20;

[0045] S30: Figure 2 As shown, the turning tool assembly 300 is placed around the discharge roller 20, and the turning tool assembly 300 includes a turning tool 320, which can move along the axial direction of the cylinder 10; Figure 2 As shown, the turning tool 320 is installed on the movable tool holder 330, and the movable tool holder 330 is slidably matched with the base 310, that is, the movable tool holder 330 is installed at the output end of the travel drive component to indirectly drive the turning tool 320 to move axially along the discharge roller 20.

[0046] S40: Under normal production conditions, the turning tool 320 feeds and moves axially along the cylinder 10 to process the outer periphery of the discharge roller 20; the discharge roller 20 is turned under normal operation, which, on the one hand, increases the turning speed, and on the other hand, does not affect production during the turning process. On the other hand, the state of the discharge roller 20 after turning is matched with the production state by turning under production conditions, and finally achieves the purpose of reducing the amplitude of the discharge end jump under production conditions.

[0047] S50: Observe whether the deviation between the tool mark of the first turning and the marked peak position is within a preset range. If so, continue feeding and turning, and measure the vibration acceleration of the bearing seat 60 during each turning until the maximum value of the vibration acceleration is within the tolerance range; if not, execute S60;

[0048] S60: After fine-tuning the horizontal position of the turning tool 320, the outer periphery of the discharge roller 20 is re-turned until the deviation between the turning mark and the wave peak position after a certain fine-tuning is within the preset range, then the feed turning is continued, and the vibration acceleration of the bearing seat 60 is measured during each turning until the maximum value of the vibration acceleration is within the tolerance range. There are many ways to adjust the turning tool 320 in the horizontal direction, which are not detailed here. For example, a waist-shaped hole can be opened on the mounting surface of the turning tool 320, and the waist-shaped hole extends in the horizontal direction. A screw is passed through the waist-shaped hole to connect with the movable tool holder 330 to fasten the turning tool 320. The horizontal position of the turning tool 320 can be adjusted by loosening the screw.

[0049] During the turning process, due to the wavy shape of the discharge roller 20, it was found on site that the vibration acceleration of the bearing seat 60 after turning was even greater. It was summarized that this situation was because the two discharge rollers 40 were both against the trough section, and the initial position of the turning tool 320 was also in the trough section, that is, the turning tool 320 was turning the trough from the beginning, and as the discharge roller 20 rotated, when the peak (the position that should have been turned) reached the top of the turning tool 320, the two discharge rollers 40 also rested on the peak as the discharge roller 20 rotated, and then the turning tool 320 was located at the trough section. The wave crest above the tool 320 is lifted up, causing the turning tool 320 to be unable to turn to the wave crest position, while the wave trough position has been turned all the time, and the more it is turned, the greater the acceleration of the bearing seat 60. Steps S50 and S60 avoid the above situation. After the first turning, the turning marks are compared with the marked wave crest position, and the position is adjusted to be within the preset range before formal turning is carried out to ensure that the turned position is the wave crest position, thereby ensuring that during the turning process, the discharge roller 20 actually tends to be circular, thereby gradually improving the situation of excessive vibration at the discharge end.

[0050] In summary, the drum mixer roller processing method of this embodiment measures the circular runout of the discharge roller 20 and records the position of the wave peak, thereby finding the cause of the runout of the discharge end of the drum mixer. When turning the discharge roller 20, a small amount of feed is first made. At this time, since the outer periphery of the discharge roller 20 is wavy, the turning marks of the outer periphery of the discharge roller 20 turned out by the first turn are discontinuous. In order to ensure that the turning position is the position of the wave peak, the turning marks are compared with the marked wave peak position. If the deviation is large, it means that the position of the turning from this position is not the wave peak, and the turning position If there is an error in the setting, the position of the turning tool 320 is adjusted horizontally according to the deviation value. The formal turning is carried out only when the deviation is within the preset range, ensuring that when the turning is officially started, turning is carried out from the position of the wave peak downward, and then ensuring that when the feed depth is gradually increased, the discharge roller 20 gradually tends to be circular. After many passes, the vibration acceleration of the bearing seat 60 is gradually reduced by detecting that it indicates that the discharge roller 20 gradually tends to be circular, which solves the problem of excessive vibration at the discharge end of the drum mixer without replacing parts, greatly saving costs, and there is no need to stop the machine for too long, and no loss to production.

[0051] Preferably, in step S10, the cylinder 10 is driven by the micro-drive system. The above arrangement is adapted to the speed of measuring and marking the peak position in the early stage.

[0052] Preferably, a dial indicator 200 is used to measure the circular runout of the discharge roller 20. Generally, the dial indicator 200 is often used for circular runout measurement of precision instruments. In this embodiment, the dial indicator 200 is used to measure the circular runout of the discharge roller 20, and the measurement result is accurate.

[0053] Preferably, in S50, during the first turning, the turning starting position is marked on the end face of the discharge roller 20; in S60, before fine-tuning, the discharge roller 20 is rotated so that the marked position is aligned with the turning tool 320, and then the turning tool 320 is fine-tuned. Through the above-mentioned arrangement, when adjusting the position of the turning tool 320, the adjustment is made based on the first tool feed position, so that the adjustment operation has a benchmark, rather than blindly adjusting, thereby reducing the number of adjustments and shortening the debugging time. It should be noted that, in theory, it is feasible to rotate the discharge roller 20 to keep the turning tool 320 stationary during fine-tuning, but since fine-tuning is difficult to achieve when the machine is turned on, the turning tool 320 is adjusted in the horizontal direction.

[0054] Preferably, in S60, the lateral fine adjustment distance of the turning tool 320 is the deviation between the wave crest position and the turning tool mark. Adjustment is performed based on the deviation value so that the turning tool 320 can more easily find the wave crest position for turning.

[0055] Optionally, the fluctuation period of the outer ring of the discharge roller 20 is 210 mm.

[0056] Optionally, the preset range is 0mm-50mm. Since the overall size of the drum mixer is relatively large, the preset range is set at 0mm-50mm, which is reasonably set within the fluctuation period of the discharge roller 20, while avoiding the range being too small to increase the workload of debugging.

[0057] The turning tool assembly 300 is preferably located between the two discharge rollers 40. This arrangement, on the one hand, allows the turning tool 320 to be positioned on a flat surface, providing improved stability. Furthermore, the position between the two discharge rollers 40 provides minimal vibration, resulting in better turning results and a more rounded discharge roller table 20. It should be noted that the preferred location is directly between the two discharge rollers 40. However, the turning tool 320 will deviate slightly after lateral fine-tuning. This small offset, however, is not affected by the large size of the drum mixer and does not affect the turning effect.

[0058] Specifically, the turning tool assembly 300 includes a base 310 and a turning tool 320. A travel drive member (not shown) is mounted on the base 310 to drive the turning tool 320 to move on the base 310. S30 includes:

[0059] S31: placing the turning tool assembly 300 between the two discharge rollers 40 so that the turning tool 320 is located at the bottom of the circumference of the discharge roller 20;

[0060] S32 : Adjust the motion trajectory of the turning tool 320 to be parallel to the axis of the discharge roller 20 .

[0061] Further, S32 is specifically as follows: S321: first, the turning tool 320 is placed under one end of the discharge roller 20, and the gap value a between the top of the turning tool 320 and the discharge roller 20 is measured; the travel drive component drives the turning tool 320 to the bottom of the other end of the discharge roller 20, and the gap value b between the top of the turning tool 320 and the discharge roller 20 is measured;

[0062] S322: When the absolute value of ab is greater than the preset value, a gasket is added to the bottom of the base 310 at the end with the larger value, or a gasket is reduced at the bottom of the base 310 at the end with the smaller value; repeat S321 until the absolute value of ab is less than the preset value, and fix the base 310 on the base 400 of the cylindrical mixer.

[0063] By the above setting, it is ensured that before turning, the trajectory of the tool is consistent with the trajectory of the discharge roller 20. Optionally, the preset value is 0.1 mm. In other embodiments, the preset value can be adjusted according to the actual accuracy requirements and is not limited here.

[0064] Optionally, after ensuring that the moving track of the cutter coincides with the moving track of the discharge roller 20 , the base 310 is welded to the base 400 of the tumble mixer or connected by screws.

[0065] The vibration acceleration data of the four bearing seats 60 corresponding to the two discharge rollers 40 (each discharge roller 40 corresponds to two bearing seats 60) during the debugging process are shown in Table 1, where the vibration acceleration of each bearing seat 60 is measured in two directions.

[0066] Table 1

[0067]

[0068] Among them, after the first turning, the vibration acceleration at some measuring positions increased, indicating that there was a deviation in the position of the first feed. After the deviation was adjusted laterally, the vibration acceleration began to decrease significantly after the second feed, indicating that the peak was turned when turning again after the adjustment, and the adjustment was necessary and effective.

[0069] Furthermore, the feed amount of the first turning is 0.1 mm, and the feed amount of the second to tenth turning is 0.2 mm. In actual production, it can be appropriately adjusted according to the situation and is not limited here.

[0070] After ten times of turning, the vibration value of the bearing seat 60 was significantly reduced, and the jump amount at the discharge end of the cylinder 10 was significantly reduced, meeting the requirements of the project design, eliminating the equipment failure, and restoring the equipment performance.

[0071] Example 2

[0072] The difference between this embodiment and the first embodiment is that the lubrication system of the drum mixer is stopped when the discharge roller 20 is turned. Through the above arrangement, the resistance during turning is smaller and the turning speed is increased.

[0073] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A method for processing roller rings of a cylindrical mixer, wherein the cylindrical mixer comprises a cylindrical body (10), a discharge roller (20) and a feed roller (30) arranged outside the cylindrical body (10) at intervals along the circumference of the cylindrical body (10), two discharge rollers (40), and two feed rollers (50), wherein the two discharge rollers (40) are used to support the discharge roller (20) and are both pivotally connected to a bearing seat (60), and the two feed rollers (50) are used to support the feed roller (30) and are both pivotally connected to the bearing seat (60), the cylindrical body (10) can be driven to rotate by a driving system, and the discharge end of the cylindrical body (10) has an excessive runout, characterized in that: The drum mixer roller processing method comprises: S10: measuring the circular runout of the discharge roller (20) under no-load conditions; S20: the discharging roller (20) performs circular runout in a wave shape, and the peak position is marked on the end surface of the discharging roller (20); S30: placing a turning tool assembly (300) circumferentially of the discharge roller (20), wherein the turning tool assembly (300) includes a turning tool (320), and the turning tool (320) is capable of moving along the axial direction of the cylinder (10); S40: Under normal production conditions, the turning tool (320) advances and moves along the axial direction of the cylinder (10) to process the outer periphery of the discharge roller (20); S50: Observe whether the deviation between the tool mark of the first turning and the marked peak position is within a preset range; if so, continue to feed turning, and measure the vibration acceleration of the bearing seat (60) during each turning until the maximum value of the vibration acceleration is within the tolerance range; if not, execute S60; S60: After fine-tuning the horizontal position of the turning tool (320), the outer periphery of the discharge roller (20) is re-turned until the deviation between the turning trace and the peak position after a certain fine-tuning is within a preset range, then the feed turning is continued, and the vibration acceleration of the bearing seat (60) is measured during each turning until the maximum value of the vibration acceleration is within the tolerance range.

2. The drum mixer roller processing method according to claim 1, characterized in that: In the step S60, the fine adjustment distance of the turning tool (320) in the lateral direction is the deviation between the peak position and the turning tool mark.

3. The drum mixer roller processing method according to claim 1, characterized in that: The preset range is 0mm-50mm.

4. The drum mixer roller processing method according to claim 1, characterized in that: In the step S50, during the first turning, the turning starting position is marked on the end surface of the discharge roller (20); and in the step S60, before fine-tuning, the discharge roller (20) is rotated so that the marked position is aligned with the turning tool (320), and then the turning tool (320) is fine-tuned.

5. The drum mixer roller processing method according to any one of claims 1 to 4, characterized in that: The circular runout of the discharge roller (20) is measured using a dial indicator (200).

6. The drum mixer roller processing method according to any one of claims 1 to 4, characterized in that: In the step S10, the cylinder (10) is driven by the micro-drive system.

7. The drum mixer roller processing method according to any one of claims 1 to 4, characterized in that: The turning tool assembly (300) is located between the two discharge rollers (40).

8. The drum mixer roller processing method according to claim 7, characterized in that: The turning tool assembly (300) includes a base (310) and a turning tool (320), wherein a travel drive member is installed on the base (310) to drive the turning tool (320) to move on the base (310), and the step S30 includes: S31: placing the turning tool assembly (300) between the two discharge rollers (40) so that the turning tool (320) is located at the bottom of the circumference of the discharge roller (20); S32: Adjust the motion trajectory of the turning tool (320) to be parallel to the axis of the discharge roller (20).

9. The drum mixer roller processing method according to claim 8, characterized in that: The S32 is specifically: S321: firstly place the turning tool (320) below one end of the discharge roller (20), and measure the gap value a between the top of the turning tool (320) and the discharge roller (20); The travel drive member drives the turning tool (320) to the bottom of the other end of the discharge roller (20), and measures the gap value b between the top of the turning tool (320) and the discharge roller (20); S322: When the absolute value of ab is greater than a preset value, a gasket is added to the bottom of the base (310) at the end with the larger value, or a gasket is reduced at the bottom of the base (310) at the end with the smaller value; S321 is repeated until the absolute value of ab is less than the preset value, and the base (310) is fixed on the base (400) of the drum mixer.

10. The drum mixer roller processing method according to any one of claims 1 to 4, characterized in that: When the discharge roller (20) is being turned, the lubrication and oiling system of the drum mixer is stopped.

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