Processing method of rotor silicon steel sheet

Abstract

The invention relates to a rotor silicon steel sheet processing method, which belongs to the technical field of motor manufacturing, and comprises the following steps: 1, measuring the area S of a silicon steel sheet, and feeding to a stamping station; 2, punching the silicon steel sheet; 3, the silicon steel sheet is sent to an annealing furnace to be annealed; 4, judging whether the silicon steel sheet area is larger than a threshold value or not, if yes, executing the step 5, and if not, executing the step 6; 5, the silicon steel sheet is blown, and the step 7 is executed; 6, the silicon steel sheet is wiped, and the step 7 is executed; 7, blanking and stacking the silicon steel sheets; the fourth step further comprises the steps that the area threshold value S0 is input into the control module in advance, and the control module judges whether S is larger than S0 or not; the step 5 further comprises the steps of purging the silicon steel sheet, wherein the power P1 of a purging machine is equal to S / S0 * P0; the step 6 further comprises wiping the silicon steel sheet, wherein the power P2 of a wiping machine is equal to S / S0 * P0.

Description

Technical Field

[0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a method for processing a rotor silicon steel sheet. Background Art

[0002] The motor rotor is the core structure of various motors, used to carry the coil and perform the rotation of the motor. Its structure is usually a cylinder with a number of axial grooves on the side. Since it is too costly to directly cut a single solid cylinder, in the prior art, several silicon steel sheets are usually used to process the cross-sectional shape of the rotor, and the several silicon steel sheets are stacked to form a columnar structure.

[0003] The general silicon steel sheet processing method is to use a punching machine to cut the silicon steel sheet into a target shape. However, since the formation of the rotor involves the stacking and combination of several silicon steel sheets, the oil and other debris on the surface of the silicon steel sheet will affect the bonding strength. For this reason, Chinese patent CN116633094A discloses a motor rotor core punching process, including feeding, punching, blanking and stacking, shaft core punching, and meson assembly steps. The plate is sent to the equipment for stamping and forming, and then blanking and stacking are performed to form a silicon steel sheet group. The silicon steel sheet group is punched and assembled in the core punching equipment to obtain a rotor. Before the blanking and stacking steps, a degreasing step is added to reduce the oil on the upper and lower surfaces of the sheet; wherein, the blanking and stacking steps use a press, the press is fixedly mounted on the equipment frame, the equipment frame is fixed on the processing platform, and a degreasing mechanism is provided under the press, and the punch of the press is linked with the degreasing mechanism to drive the degreasing mechanism to intermittently wipe the upper and lower surfaces of the sheet. By using the core punching process, the cleanliness of the silicon steel sheets during the stacking process is improved, and the firmness and precision of the silicon steel sheet group of the rotor are also improved, thereby improving the rotation speed of the rotor and the stability during high-speed rotation; however, the sizes of different motors are quite different from each other, and the sizes of rotors of motors of different sizes are quite different. At this time, the sizes of the silicon steel sheets to be processed are quite different. Different silicon steel sheets require different cleaning methods. In the above scheme, the means for cleaning the oil stains of the silicon steel sheets cannot be adjusted according to the area, and the cleaning effect is insufficient. Therefore, a processing method for rotor silicon steel sheets with good oil stain cleaning effect is needed. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a method for processing rotor silicon steel sheets, which has the characteristics of good oil cleaning effect.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A method for processing a rotor silicon steel sheet comprises the following steps:

[0007] Step 1: Measure the area of ​​the silicon steel sheet and send it to the stamping station;

[0008] Step 2: stamping the silicon steel sheet;

[0009] Step 3: Send the silicon steel sheet to the annealing furnace for annealing;

[0010] Step 4: Determine whether the area of ​​the silicon steel sheet is greater than a threshold value. If the determination result is yes, execute step 5; otherwise, execute step 6.

[0011] Step 5: Purge the silicon steel sheet and execute step 7;

[0012] Step 6: Wipe the silicon steel sheet and proceed to step 7;

[0013] Step 7: Blank and stack the silicon steel sheets.

[0014] As a preferred technical solution of the present invention, the step one also includes: measuring the area S of the silicon steel sheet; the step four also includes: inputting the area threshold S0 into the control module in advance, and the control module determines whether S is greater than S0; the step five also includes: purging the silicon steel sheet, and the power of the purging machine P1=S / S0×P0; the step six also includes: wiping the silicon steel sheet, and the power of the wiping machine P2=S / S0×P0;

[0015] As a preferred technical solution of the present invention, step four also includes: judging whether the area of ​​the silicon steel sheet is greater than a second area threshold. When the judgment result is yes, after wiping the silicon steel sheet in step six, the silicon steel sheet is purged and step seven is executed.

[0016] As a preferred technical solution of the present invention, step four also includes: inputting the second area threshold S02 into the control module in advance, judging whether the area of ​​the silicon steel sheet is greater than the second threshold, and when the judgment result is yes, wiping the silicon steel sheet in step six, and then blowing the silicon steel sheet, and the power of the blowing machine P1 = S / S0×P02.

[0017] As a preferred technical solution of the present invention, the step three also includes: sending the silicon steel sheet to an annealing furnace for annealing, wherein the annealing time t = (|S0×S / 2-S1|)×t0, wherein S1 is an area reference value.

[0018] As a preferred technical solution of the present invention, it also includes a control panel, which is used to input the values ​​of S0, S02 and S1.

[0019] The beneficial effects of the present invention are:

[0020] (1) By measuring the area of ​​the silicon steel sheet and switching the blowing or wiping mode according to the area of ​​the silicon steel sheet, the probability of the degreasing equipment damaging the structural strength is reduced when the silicon steel sheet has a small area and a weak structural strength and cannot withstand high-speed wiping, and the degreasing effect is improved when the silicon steel sheet has a large area and a strong structural strength and can withstand high-speed wiping;

[0021] (2) By adjusting the power of the purge machine and the wiper machine according to the area of ​​the silicon steel sheet, the power can be reduced when the area is small and high power is not required, thus reducing energy consumption; and when the area is large and a stronger degreasing effect is required, energy consumption can be increased to ensure the degreasing effect;

[0022] (3) By adjusting the annealing time according to the area, the annealing time can be extended when the area is small and the stress bearing capacity is poor, thereby improving the effect of stress elimination; when the area is large and the stress bearing capacity is strong, the annealing time can be reduced to improve the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 It is a schematic structural diagram of the wiping machine of the present invention.

[0025] Description of main component symbols:

[0026] In the figure: 1. wiping machine; 11. wiping roller; 12. dropper; 2. control module. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0028] See also Figure 1 , a rotor silicon steel sheet processing method, comprising the following steps: Step 1: measuring the area of ​​the silicon steel sheet and sending it to a stamping station;

[0029] Specifically, in this embodiment, before each production is carried out, the operator determines the production batch and the number of silicon steel sheets in each production batch. The area of ​​the silicon steel sheets in a certain production batch is consistent. After they are in place, a camera module is provided at the stamping station, and the camera module is electrically connected to the control module 2. The process of area measurement is as follows: the camera module takes an image of the silicon steel sheet and uploads it to the control module 2. The control module 2 determines the area size of the silicon steel sheet based on the image. The stamping station includes a stamping machine. The stamping station of the stamping machine is the position of the stamping machine for stamping. When in use, the operator puts the silicon steel sheet into the stamping station manually or by means of a conveying device, and then executes step two.

[0030] Step 2: stamping the silicon steel sheet. Specifically, the silicon steel sheet is stamped into a shape consistent with the rotor cross section. When a silicon steel sheet is stamped, step 3 is executed;

[0031] Step 3: Send the silicon steel sheet to the annealing furnace for annealing. Specifically, the operator makes a judgment on a batch of silicon steel sheets with the same area, or puts a silicon steel sheet into the annealing furnace, takes it out after heating and annealing for a period of time, and then performs step 4;

[0032] Step 4: The control module 2 determines whether the area of ​​the silicon steel sheet is greater than the threshold value according to the area data. When the judgment result is yes, step 5 is executed, otherwise step 6 is executed. Specifically, for each production batch, the control module 2 performs a judgment once, and after the judgment, this batch is the step after all silicon steel sheets are synchronously executed;

[0033] Step 5: Purge the silicon steel sheet and execute step 7;

[0034] Step 6: Wipe the silicon steel sheet and proceed to step 7;

[0035] Specifically, since the rotor is small for small and micro motors, the area of ​​the silicon steel sheet is small, and the structural strength is poor, wiping may easily cause structural damage. Therefore, when the area is less than the threshold, it means that the area of ​​the silicon steel sheet is small. At this time, step five is executed to clean the oil stains on the silicon steel sheet by blowing. Specifically, the blowing step includes at least one blowing machine, which is electrically connected to the control module 2. The blowing machine includes one or more blowing heads and clamps. The clamp fixes the silicon steel sheet, and then the blowing head blows the silicon steel sheet, so that the oil stains on the surface of the silicon steel sheet are blown away, completing the blowing of the silicon steel sheet with a smaller area.

[0036] When the area of ​​the silicon steel sheet is large, the structural strength is large, and it can withstand a large external force at this time. In addition, the effect of removing oil stains by blowing is poorer than that of direct wiping. At this time, wiping means are needed to improve the effect of removing oil stains. For this reason, when the area is greater than the threshold, step six is ​​executed, and the oil stains on the silicon steel sheet are cleaned by wiping. Specifically, the wiping step includes at least one wiping machine 1, which is electrically connected to the control module 2. The wiping machine 1 includes a wiping roller 11 and a clamp. The surface of the wiping roller 11 is affixed with gauze. The clamp is arranged under the wiping roller 11, and the clamp is used to fix the silicon steel sheet; the clamp cooperates with the wiping roller 11 to form a wiping station, and a dropper 12 is arranged above the wiping roller 11. The dropper 12 is used to squeeze out the detergent. When in use, the liquid outlet of the dropper 12 transports the detergent to the gauze on the wiping roller 11, and the gauze drives the detergent to wipe the silicon steel sheet to complete the cleaning of the oil stains.

[0037] By measuring the area of ​​the silicon steel sheet and switching the blowing or wiping mode according to the area of ​​the silicon steel sheet, the probability of the degreasing equipment damaging the structural strength is reduced when the silicon steel sheet has a small area and a weak structural strength and cannot withstand high-speed wiping, and the degreasing effect is improved when the silicon steel sheet has a large area and a strong structural strength and can withstand high-speed wiping;

[0038] After a batch of silicon steel sheets has completed step five or step six, step seven is performed;

[0039] Step 7: Blank and stack the silicon steel sheets to facilitate subsequent processing of the silicon steel sheets.

[0040] Specifically, in the above step 1: the camera module measures the area of ​​the silicon steel sheet and uploads the area data S to the control module 2; at the same time, for the adjustment process in step 4, specifically, the operator first inputs the area threshold S0 into the control module 2 in advance, and each time the control module 2 receives the area data, the area data determines whether S is greater than S0;

[0041] At the same time, since the strength of removing oil stains required for silicon steel sheets of different areas is different, the larger the area of ​​the silicon steel sheet, the greater the probability of residual oil stains. Therefore, the larger the area of ​​the silicon steel sheet, the greater the degreasing power required. When the degreasing power exceeds the required amount, there is a probability that energy consumption will be wasted. At the same time, the excessive degreasing power may cause damage to the silicon steel sheet. Therefore, step five also includes: purging the silicon steel sheet, and the power of the purge machine is adjusted by the control module 2 to P1=S / S0×P0; step six also includes: wiping the silicon steel sheet, and the power of the wiping machine 1 is adjusted by the control module 2 to P2=S / S0×P0;

[0042] When S is large, it means that the area is large, the structural strength is strong, and it can withstand a large oil removal power, and the area of ​​residual oil is large. When the control module 2 adjusts the power of the purge machine and the wiper 1 to P1=S / S0×P0 and P2=S / S0×P0 respectively, the removal power is increased when the area of ​​the silicon steel sheet is large; when S is small, the area is small, the probability of residual oil is relatively small, and the structural strength is small, and the ability to withstand oil removal is poor. For this reason, it is necessary to reduce the removal power. When the control module 2 adjusts the power of the purge machine and the wiper 1 to P1=S / S0×P0 and P2=S / S0×P0 respectively, the power of the purge module is reduced when the area is small;

[0043] In some cases, the area of ​​the silicon steel sheet is large, much larger than the area threshold. At this time, the oil residue on the surface of the silicon steel sheet is large. At this time, more sufficient degreasing means are needed to ensure the oil cleaning effect. For this reason, step 4 also includes: judging whether the area of ​​the silicon steel sheet is greater than the second area threshold. When the judgment result is yes, after wiping the silicon steel sheet in step 6, the silicon steel sheet is purged, and step 7 is executed;

[0044] By adjusting the power of the blower and the wiper 1 according to the area of ​​the silicon steel sheet, the power can be reduced and energy consumption can be reduced when the area is small and excessive power is not needed. When the area is large and a stronger oil removal effect is required, energy consumption can be increased to ensure the oil removal effect.

[0045] In some cases, such as for large motors, the volume of the rotor is further increased. At this time, the area of ​​the silicon steel sheet is relatively large. In the above process, the single means of removing oil stains may still fail to remove the oil stains. In order to further improve the cleaning effect, specifically, in step one: the second area threshold S02 is pre-input into the control module 2. In step four, after the control module 2 determines that the area of ​​the silicon steel sheet is greater than the threshold, it further determines whether the area of ​​the silicon steel sheet is greater than the second threshold. When the judgment result is yes, it means that the area of ​​the silicon steel sheet is relatively large, and it is necessary to introduce additional means of removing oil stains. At this time, after wiping the silicon steel sheet in step six, the silicon steel sheet is further purged, wherein the control module 2 instructs the power of the purge machine to be adjusted to P1×A1, A1=1+(S-S02) / S;

[0046] When the area of ​​the silicon steel sheet exceeds S02 to a large extent, it means that the area of ​​the silicon steel sheet is large, and the power of the purge machine in the purge step needs to be further increased to ensure the cleaning effect. At this time, A1=1+(S-S02) / S exceeds 1 to a large extent, and P1×A1 exceeds P1 to a large extent, and the purge power is increased when the area of ​​the silicon steel sheet is large and the purge power needs to be increased;

[0047] Similarly, when the area of ​​the silicon steel sheet slightly exceeds S02, it means that the area of ​​the silicon steel sheet is relatively moderate, and there is no need to further increase the power of the purge machine in the purge step. At this time, A1=1+(S-S02) / S is close to 1, and P1×A1 is close to P1. When the area of ​​the silicon steel sheet is relatively moderate and there is no need to increase the power of the purge machine, the power of the purge machine is maintained at P1, thereby reducing energy consumption.

[0048] Under different circumstances, different silicon steel sheets bear different stresses. When the area of ​​the silicon steel sheet is small, the structural strength is low, the ability to cope with stress is poor, and more sufficient annealing is required. On the contrary, when the area of ​​the silicon steel sheet is large, the ability to cope with stress is strong, and more sufficient annealing is not required to ensure the operation efficiency. For this reason, step three also includes: sending the silicon steel sheet to an annealing furnace for annealing, wherein the annealing time t = [1 + (|-S + S1|) / S1] × t0, 0 ≤ S ≤ S1, S1 is a pre-input area reference value, and S1 is greater than S0;

[0049] When the value of S is small, much smaller than S1, the value of (|-S+S1|) / S1 greatly exceeds 0, and the value of t=[1+(|-S+S1|) / S1]×t0 greatly exceeds t0. When the area of ​​the silicon steel sheet is small, the structural strength is low, the ability to cope with stress is poor, and more sufficient annealing is required, the annealing time is increased;

[0050] When the value of S is large and close to S1, the value of (|-S+S1|) / S1 is close to 0, and the value of [1+(|-S+S1|) / S1]×t0 is close to t0. When the area of ​​the silicon steel sheet is large, the ability to cope with stress is strong, and more sufficient annealing is not required. When the operating efficiency is guaranteed, the annealing time is maintained at a lower level;

[0051] By adjusting the annealing time according to the area, when the area of ​​the silicon steel sheet is small, more sufficient annealing can be performed, and when the area of ​​the silicon steel sheet is large and no more sufficient annealing is required, the operating efficiency is guaranteed.

[0052] In order to facilitate the input of the values ​​of S0, S02 and S1, a control panel is also included, and the control panel is electrically connected to the control module. In step one, the operator inputs the values ​​of S0, S02 and S1 in the control panel.

[0053] To facilitate stacking, in step seven, before stacking, a placement position indication is drawn on the bottom plate of the stacking area. In this embodiment, the stacking area includes a rectangular bottom plate, and a plurality of position limiting structures are erected on the upper surface of the rectangular bottom plate near the edge. The position limiting structures are a plurality of cylindrical structures perpendicular to the bottom plate. The plurality of cylindrical structures and the bottom plate together constitute the stacking area.

[0054] When a batch of silicon steel sheets are stacked, they are placed in a stacking area surrounded by several cylindrical structures and a bottom plate. When the silicon steel sheets tend to deviate, the cylindrical structures around the stacking area abut against the silicon steel sheets to prevent them from deviating, thereby completing the circumferential limitation of the silicon steel sheets.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for processing a rotor silicon steel sheet, characterized in that: The following steps are involved: Step 1: Measure the area of ​​the silicon steel sheet and send it to the stamping station; Step 2: stamping the silicon steel sheet; Step 3: Send the silicon steel sheet to the annealing furnace for annealing; Step 4: Determine whether the area of ​​the silicon steel sheet is greater than a threshold value. If the determination result is yes, execute step 5; otherwise, execute step 6. Step 5: Purge the silicon steel sheet and execute step 7; Step 6: Wipe the silicon steel sheet and proceed to step 7; Step 7: Blank and stack the silicon steel sheets.

2. The method for processing a rotor silicon steel sheet according to claim 1, characterized in that: The step one also includes: determining the area S of the silicon steel sheet; the step four also includes: inputting the area threshold S0 into the control module in advance, and the control module determines whether S is greater than S0; the step five also includes: purging the silicon steel sheet, and the power of the purging machine P1 = S / S0×P0; the step six also includes: wiping the silicon steel sheet, and the power of the wiping machine P2 = S / S0×P0.

3. The method for processing a rotor silicon steel sheet according to claim 2, characterized in that: The step four also includes: judging whether the area of ​​the silicon steel sheet is greater than a second area threshold value. When the judgment result is yes, after wiping the silicon steel sheet in step six, the silicon steel sheet is purged and step seven is executed.

4. The method for processing a rotor silicon steel sheet according to claim 3, characterized in that: The step one also includes: pre-inputting the second area threshold S02 into the control module; the step four also includes: judging whether the area of ​​the silicon steel sheet is greater than the second threshold, when the judgment result is yes, after wiping the silicon steel sheet in step six, the silicon steel sheet is purged, and the power of the purge machine is P1×A1, A1=1+(S-S02) / S.

5. The method for processing a rotor silicon steel sheet according to claim 4, characterized in that: The step three also includes: sending the silicon steel sheet to an annealing furnace for annealing, and the annealing time t=[1+(S-S1) / S0]×t0, wherein S1 is an area reference value.

6. The method for processing a rotor silicon steel sheet according to claim 5, characterized in that: The step one also includes: inputting the values ​​of S0, S02 and S1 using a control panel.

7. The method for processing a rotor silicon steel sheet according to claim 1, characterized in that: The step seven also includes: when stacking the silicon steel sheets, using the limiting structure around the bottom plate of the stacking area to limit the circumference.

8. The method for processing a rotor silicon steel sheet according to claim 1, characterized in that: The step seven also includes: marking placement position indications on the bottom plate of the stacking area before stacking.

Images