Claw pole producing and processing method

Abstract

The invention discloses a claw pole production and processing method which can repair part of claw poles with flaws to reduce the rejection rate of the claw poles, so that the production cost of the claw poles and the recovery cost of the scrapped claw poles are reduced. The surface performance of the claw pole is improved through annealing treatment, and the structure defect of the claw pole is eliminated, so that the possibility of flaws of the claw pole is reduced; and the claw pole is shaped for multiple times and multiple sections through the shaping machine cylinder, so that the shaping accuracy of the claw pole is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of claw pole processing, and in particular to a claw pole production and processing method. Background Art

[0002] As a driving device that converts electrical energy into mechanical energy output, the motor is widely used in the fields of industry, home appliances, and automobiles. Among them, claw-pole motors are widely used in the automotive field due to their advantages such as low structural cost and simple driving circuit. Claw poles are one of the core components of claw-pole motors. They are used in pairs in generators and are the main components for forming a rotating magnetic field. The claw pole structure is relatively simple, and the existing manufacturing method is direct hot forging. After the claw pole blank is forged, flash is generated in its radial direction, and the interaction between the trimming upper die and the lower die is required to remove and shape the flash. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a claw pole production and processing method.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention provides a claw pole production and processing method, comprising the following steps: Step 1: Put the raw material into the die and perform hot forging through a forging machine to obtain a claw pole hot forging; Step 2: heat-treating the obtained claw pole hot forging, and cooling it to room temperature after the heat treatment is completed; Step 3: The claw pole hot forging that has completed heat treatment is shaped by a shaping machine to obtain a semi-finished claw pole; Step 4: performing surface treatment on the semi-finished claw pole after shaping to obtain a claw pole; Step 5: Detect the claw poles and divide them into qualified claw poles and defective claw poles; Step 6: Determine whether the defect claw pole can be repaired according to the degree of defect; Step 7: The repairable defective claw pole is surface-repaired through a repair process, and the unrepairable defective claw pole is scrapped.

[0005] Compared with the prior art, the present invention has the following beneficial effects: Some claw poles with defects can be repaired to reduce the scrap rate of claw poles, thereby reducing the cost of claw pole production and the recycling cost of scrap claw poles.

[0006] As a preferred technical solution of the present invention, the heat treatment comprises the following sub-steps: Step 21: heating the claw pole hot forging to 1000-1300° C. in a medium frequency furnace; Step 22: Cool the claw hot forging to 700-800°C for 5-10 minutes; Step 23: Place it in an incubator and keep it warm for 20-40 minutes; Step 24: Cool the claw hot forging to 600-650°C for 5-10 minutes; Step 25: Finally, cool the claw hot forging to room temperature.

[0007] Compared with the prior art, the present invention has the following beneficial effects: The surface properties of the claw pole are improved by annealing treatment, and the structural defects of the claw pole are eliminated, thereby reducing the possibility of defects in the claw pole.

[0008] As a preferred technical solution of the present invention, the shaping includes the following sub-steps: Step 31: Replace the corresponding shaping die according to the size of the claw pole hot forging and the number of claw teeth; Step 32: setting the number of shaping times of the claw hot forging and the stroke of the shaping machine cylinder during each shaping; Step 33: During shaping, the stroke of the shaping machine cylinder increases in the range of 0.1-1.1 mm.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The claw pole is shaped multiple times and in multiple stages by the shaping machine cylinder, thereby improving the accuracy of claw pole shaping.

[0010] As a preferred technical solution of the present invention, the surface treatment comprises the following sub-steps: Step 41: The claw pole semi-finished product is subjected to a shot blasting treatment on its surface by a shot blasting machine to remove an oxide layer on the surface of the claw pole semi-finished product; Step 42: The claw pole that has been shot blasted is finely finished on the surface by a machine tool; Step 43: The claw pole semi-finished product is manually polished to remove burrs on its surface.

[0011] As a preferred technical solution of the present invention, the claw pole detection and judging whether it can be repaired include the following sub-steps: Step 61: Put the claw pole into the testing mold. If it can be smoothly put into the testing mold without displacement in the testing mold, it means that the claw pole is a preliminary qualified claw pole, otherwise it is a defective claw pole; Step 62: The initially qualified claw pole is inspected by a flaw detector and manual inspection. If the inspection passes, it is a qualified claw pole, otherwise it is a defective claw pole; Step 63: The defective claw poles are inspected and selected by means of flaw detectors and manual inspection. If the defective claw poles only have surface defects, they are judged to be repairable. If the defective claw poles have cracks or are broken, they are judged to be unrepairable.

[0012] As a preferred technical solution of the present invention, the repair comprises the following sub-steps: Step 71: If the defect on the surface of the repairable claw pole is a protrusion, the protrusion is first polished, and then fine-finished by a machine tool. After the repair is completed, it is tested again. If the test is qualified, it is a qualified claw pole, otherwise it is judged that the claw pole cannot be repaired; Step 72: If the defect on the repairable claw pole surface is a sand hole, the claw pole is placed in a casting molding cavity and molten metal is injected to fill the sand hole on the claw pole surface. After the repair is completed, it is tested again. If the test is qualified, it is a qualified claw pole. Otherwise, it is determined that the claw pole cannot be repaired.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Some claw poles with defects can be repaired to reduce the scrap rate of claw poles, thereby reducing the cost of claw pole production and the recycling cost of scrap claw poles. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 is a flow chart of steps in a claw pole production and processing method; Figure 2 It is a flow chart of the steps of a heat treatment method; Figure 3 It is a flow chart of the steps of a shaping method; Figure 4 It is a flow chart of the steps of a surface treatment method; Figure 5 It is a flowchart of the steps of a method for detecting claw poles and determining whether they can be repaired; Figure 6 It is a flowchart of the steps of a repair method. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] In the drawings, the same reference numerals all refer to the same components.

[0017] Embodiment 1: like Figure 1-6 As shown, the present invention provides a claw pole production and processing method, comprising the following steps: Step 1: Put the raw material into the die and perform hot forging through a forging machine to obtain a claw pole hot forging; In this step: the metal raw material for producing the claw pole is processed into a round billet of a certain length by a shearing machine, and then the round billet is heated to a suitable forging temperature by a heating furnace, and the heated round billet is placed in the die core of a hot die forging machine, and the hot die forging machine is used to perform hot forging processing on the round billet to obtain a claw pole hot forging.

[0018] Step 2: heat-treating the obtained claw pole hot forging, and cooling it to room temperature after the heat treatment is completed; In this step, the claw-element hot forging is annealed to enhance the performance of the claw-element hot forging.

[0019] Step 3: The claw pole hot forging that has completed heat treatment is shaped by a shaping machine to obtain a semi-finished claw pole; In this step: the claw pole hot forging is shaped to adjust the shape of the claw pole hot forging.

[0020] Step 4: performing surface treatment on the semi-finished claw pole after shaping to obtain a claw pole; In this step: the semi-finished claw pole is finely trimmed by a machine tool and the burrs remaining on its surface are polished.

[0021] Step 5: Detect the claw poles and divide them into qualified claw poles and defective claw poles; In this step: the claw poles are inspected to distinguish qualified claw poles from defective claw poles to avoid defective products in the shipped products.

[0022] Step 6: Determine whether the defect claw pole can be repaired according to the degree of defect; In this step: it is determined whether the defect of the defective claw pole affects the performance of the claw pole. If it does not affect the performance, it is determined that repair can be attempted to reduce the production cost of the claw pole.

[0023] Step 7: The repairable defective claw pole is surface-repaired through a repair process, and the unrepairable defective claw pole is scrapped.

[0024] In this step: the repairable defective claw pole is repaired, and the repaired claw pole is tested, and the claw pole that passes the test is considered a qualified claw pole.

[0025] Further, the heat treatment comprises the following sub-steps: The claw pole hot forging is heated to 1000°C in a medium frequency furnace; Cool the claw hot forging to 700°C for 5 minutes; Put it in an incubator and keep it warm for 20 minutes; Cool the claw hot forging to 600°C for 5 minutes; Finally, the claw hot forging is cooled to room temperature.

[0026] In this step, the claw poles are provided with uniform ferrite and pearlite and the coarse grains are reduced.

[0027] Furthermore, shaping includes the following sub-steps: Replace the corresponding shaping die according to the size of the claw pole hot forging and the number of claw teeth; Set the number of shaping times for hot forging claws and the stroke of the shaping machine cylinder during each shaping; During shaping, the stroke of the shaping machine cylinder increases in increments of 0.1 mm.

[0028] Further, the surface treatment includes the following sub-steps: The claw pole semi-finished product is subjected to a shot blasting treatment on its surface by a shot blasting machine to remove the oxide layer on the surface of the claw pole semi-finished product; The surface of the claw pole after shot blasting is refined by machine tools; The claw pole semi-finished product is manually polished to remove burrs on its surface.

[0029] In this step: the claw pole is directly shot blasted by a shot blasting machine to remove the surface oxide layer, and the particle size of the steel shot during the shot blasting is preferably 0.6 mm; the grinding is performed manually, and after the grinding is completed, the claw pole is cleaned or flushed with high-pressure air to remove the metal debris remaining on the surface.

[0030] Furthermore, claw pole detection and determining whether it can be repaired include the following sub-steps: Put the claw pole into the test mold. If it can be put into the test mold smoothly and there is no displacement in the test mold, it means that the claw pole is a preliminary qualified claw pole, otherwise it is a defective claw pole; The initially qualified claw pole is tested by flaw detector and manual testing. If it passes the test, it is a qualified claw pole, otherwise it is a defective claw pole; The defective claw poles are inspected and selected by flaw detectors and manual inspection. If the defective claw poles only have surface defects, they are judged to be repairable. If the defective claw poles have cracks or are broken, they are judged to be irreparable.

[0031] Furthermore, the repair includes the following sub-steps: If the defect on the repairable claw pole surface is a convex part, the convex part is first polished, and then fine-tuned by a machine tool. After the repair is completed, it is tested again. If it passes the test, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired. If the defect on the surface of the repairable claw pole is a sand hole, the claw pole is placed in a casting cavity and molten metal is injected to fill the sand hole on the surface of the claw pole. After the repair is completed, it is tested again. If the test is qualified, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired.

[0032] Embodiment 2: like Figure 1-6 As shown, the present invention provides a claw pole production and processing method, comprising the following steps: Step 1: Put the raw material into the die and perform hot forging through a forging machine to obtain a claw pole hot forging; In this step: the metal raw material for producing the claw pole is processed into a round billet of a certain length by a shearing machine, and then the round billet is heated to a suitable forging temperature by a heating furnace, and the heated round billet is placed in the die core of a hot die forging machine, and the hot die forging machine is used to perform hot forging processing on the round billet to obtain a claw pole hot forging.

[0033] Step 2: heat-treating the obtained claw pole hot forging, and cooling it to room temperature after the heat treatment is completed; In this step, the claw-element hot forging is annealed to enhance the performance of the claw-element hot forging.

[0034] Step 3: The claw pole hot forging that has completed heat treatment is shaped by a shaping machine to obtain a semi-finished claw pole; In this step: the claw pole hot forging is shaped to adjust the shape of the claw pole hot forging.

[0035] Step 4: performing surface treatment on the semi-finished claw pole after shaping to obtain a claw pole; In this step: the semi-finished claw pole is finely trimmed by a machine tool and the burrs remaining on its surface are polished.

[0036] Step 5: Detect the claw poles and divide them into qualified claw poles and defective claw poles; In this step: the claw poles are inspected to distinguish qualified claw poles from defective claw poles to avoid defective products in the shipped products.

[0037] Step 6: Determine whether the defect claw pole can be repaired according to the degree of defect; In this step: it is determined whether the defect of the defective claw pole affects the performance of the claw pole. If it does not affect the performance, it is determined that repair can be attempted to reduce the production cost of the claw pole.

[0038] Step 7: The repairable defective claw pole is surface-repaired through a repair process, and the unrepairable defective claw pole is scrapped.

[0039] In this step: the repairable defective claw pole is repaired, and the repaired claw pole is tested, and the claw pole that passes the test is considered a qualified claw pole.

[0040] Further, the heat treatment comprises the following sub-steps: The claw pole hot forging is heated to 1300°C in a medium frequency furnace; Cool the claw hot forging to 800°C for 10 minutes; Put it in an incubator and keep it warm for 40 minutes; Cool the claw hot forging to 650°C for 10 minutes; Finally, the claw hot forging is cooled to room temperature.

[0041] Furthermore, shaping includes the following sub-steps: Replace the corresponding shaping die according to the size of the claw pole hot forging and the number of claw teeth; Set the number of shaping times for hot forging claws and the stroke of the shaping machine cylinder during each shaping; During shaping, the stroke of the shaping machine cylinder increases in the range of 1.1 mm.

[0042] Further, the surface treatment includes the following sub-steps: The claw pole semi-finished product is subjected to a shot blasting treatment on its surface by a shot blasting machine to remove the oxide layer on the surface of the claw pole semi-finished product; The surface of the claw pole after shot blasting is refined by machine tools; The claw pole semi-finished product is manually polished to remove burrs on its surface.

[0043] Furthermore, claw pole detection and determining whether it can be repaired include the following sub-steps: Put the claw pole into the testing mold. If it can be smoothly put into the testing mold without displacement in the testing mold, it means that the claw pole is a preliminary qualified claw pole, otherwise it is a defective claw pole. The initially qualified claw pole is tested by flaw detector and manual testing. If it passes the test, it is a qualified claw pole, otherwise it is a defective claw pole; The defective claw poles are inspected and selected by flaw detectors and manual inspection. If the defective claw poles only have surface defects, they are judged to be repairable. If the defective claw poles have cracks or are broken, they are judged to be irreparable.

[0044] Furthermore, the repair includes the following sub-steps: If the defect on the repairable claw pole surface is a convex part, the convex part is first polished, and then fine-tuned by a machine tool. After the repair is completed, it is tested again. If it passes the test, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired. If the defect on the surface of the repairable claw pole is a sand hole, the claw pole is placed in a casting cavity and molten metal is injected to fill the sand hole on the surface of the claw pole. After the repair is completed, it is tested again. If the test is qualified, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired.

[0045] Embodiment 3: like Figure 1-6 As shown, the present invention provides a claw pole production and processing method, comprising the following steps: Step 1: Put the raw material into the die and perform hot forging through a forging machine to obtain a claw pole hot forging; In this step: the metal raw material for producing the claw pole is processed into a round billet of a certain length by a shearing machine, and then the round billet is heated to a suitable forging temperature by a heating furnace, and the heated round billet is placed in the die core of a hot die forging machine, and the hot die forging machine is used to perform hot forging processing on the round billet to obtain a claw pole hot forging.

[0046] Step 2: heat-treating the obtained claw pole hot forging, and cooling it to room temperature after the heat treatment is completed; In this step, the claw-element hot forging is annealed to enhance the performance of the claw-element hot forging.

[0047] Step 3: The claw pole hot forging that has completed heat treatment is shaped by a shaping machine to obtain a semi-finished claw pole; In this step: the claw pole hot forging is shaped to adjust the shape of the claw pole hot forging.

[0048] Step 4: performing surface treatment on the semi-finished claw pole after shaping to obtain a claw pole; In this step: the semi-finished claw pole is finely trimmed by a machine tool and the burrs remaining on its surface are polished.

[0049] Step 5: Detect the claw poles and divide them into qualified claw poles and defective claw poles; In this step: the claw poles are inspected to distinguish qualified claw poles from defective claw poles to avoid defective products in the shipped products.

[0050] Step 6: Determine whether the defect claw pole can be repaired according to the degree of defect; In this step: it is determined whether the defect of the defective claw pole affects the performance of the claw pole. If it does not affect the performance, it is determined that repair can be attempted to reduce the production cost of the claw pole.

[0051] Step 7: The repairable defective claw pole is surface-repaired through a repair process, and the unrepairable defective claw pole is scrapped.

[0052] In this step: the repairable defective claw pole is repaired, and the repaired claw pole is tested, and the claw pole that passes the test is considered a qualified claw pole.

[0053] In this step: the repairable defective claw pole is repaired, and the repaired claw pole is tested, and the claw pole that passes the test is qualified. Further, the heat treatment includes the following sub-steps: The claw pole hot forging is heated to 1200°C in a medium frequency furnace; Cool the claw hot forging to 750°C for 7 minutes; Put it in an incubator and keep it warm for 3 minutes; Cool the claw hot forging to 630°C for 8 minutes; Finally, the claw hot forging is cooled to room temperature.

[0054] Furthermore, shaping includes the following sub-steps: Replace the corresponding shaping die according to the size of the claw pole hot forging and the number of claw teeth; Set the number of shaping times for hot forging claws and the stroke of the shaping machine cylinder during each shaping; During shaping, the stroke of the shaping machine cylinder increases in the range of 0.6mm.

[0055] Further, the surface treatment includes the following sub-steps: The claw pole semi-finished product is subjected to a shot blasting treatment on its surface by a shot blasting machine to remove the oxide layer on the surface of the claw pole semi-finished product; The surface of the claw pole after shot blasting is refined by machine tools; The claw pole semi-finished product is manually polished to remove burrs on its surface.

[0056] Furthermore, claw pole detection and determining whether it can be repaired include the following sub-steps: Put the claw pole into the test mold. If it can be put into the test mold smoothly and there is no displacement in the test mold, it means that the claw pole is a preliminary qualified claw pole, otherwise it is a defective claw pole; The initially qualified claw pole is tested by flaw detector and manual testing. If it passes the test, it is a qualified claw pole, otherwise it is a defective claw pole; The defective claw poles are inspected and selected by flaw detectors and manual inspection. If the defective claw poles only have surface defects, they are judged to be repairable. If the defective claw poles have cracks or are broken, they are judged to be irreparable.

[0057] Furthermore, the repair includes the following sub-steps: If the defect on the repairable claw pole surface is a convex part, the convex part is first polished, and then fine-tuned by a machine tool. After the repair is completed, it is tested again. If it passes the test, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired. If the defect on the surface of the repairable claw pole is a sand hole, the claw pole is placed in a casting cavity and molten metal is injected to fill the sand hole on the surface of the claw pole. After the repair is completed, it is tested again. If the test is qualified, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired.

[0058] The present invention discloses a claw pole production and processing method, which can repair some claw poles with defects to reduce the scrap rate of claw poles, thereby reducing the cost of claw pole production and the recycling cost of scrapped claw poles; improve the surface performance of the claw poles through annealing treatment, eliminate the structural defects of the claw poles, thereby reducing the possibility of defects in the claw poles; and shape the claw poles multiple times and in multiple stages through the shaping machine cylinder, thereby improving the accuracy of claw pole shaping.

[0059] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A claw pole production and processing method, characterized in that: The following steps are involved: Step 1: Put the raw material into the die and perform hot forging through a forging machine to obtain a claw pole hot forging; Step 2: heat-treating the obtained claw pole hot forging, and cooling it to room temperature after the heat treatment is completed; Step 3: The claw pole hot forging that has completed heat treatment is shaped by a shaping machine to obtain a semi-finished claw pole; Step 4: performing surface treatment on the semi-finished claw pole after shaping to obtain a claw pole; Step 5: Detect the claw poles and divide them into qualified claw poles and defective claw poles; Step 6: Determine whether the defect claw pole can be repaired according to the degree of defect; Step 7: The repairable defective claw pole is surface-repaired through a repair process, and the unrepairable defective claw pole is scrapped.

2. A claw pole production and processing method according to claim 1, characterized in that: The heat treatment comprises the following sub-steps: The claw pole hot forging is heated to 1000-1300°C in a medium frequency furnace; Cool the claw hot forging to 700-800℃ for 5-10 minutes; Put it in an incubator and keep it warm for 20-40 minutes; Cool the claw hot forging to 600-650℃ for 5-10 minutes; Finally, the claw hot forging is cooled to room temperature.

3. A claw pole production and processing method according to claim 1, characterized in that: The shaping comprises the following sub-steps: Replace the corresponding shaping die according to the size of the claw pole hot forging and the number of claw teeth; Set the number of shaping times for hot forging claws and the stroke of the shaping machine cylinder during each shaping; During shaping, the stroke of the shaping machine cylinder increases in the range of 0.1-1.1mm.

4. A claw pole production and processing method according to claim 1, characterized in that: The surface treatment comprises the following sub-steps: The claw pole semi-finished product is subjected to a shot blasting treatment on its surface by a shot blasting machine to remove the oxide layer on the surface of the claw pole semi-finished product; The surface of the claw pole after shot blasting is refined by machine tools; The claw pole semi-finished product is manually polished to remove burrs on its surface.

5. A claw pole production and processing method according to claim 1, characterized in that: The claw pole detection and judging whether it can be repaired include the following sub-steps: Put the claw pole into the test mold. If it can be put into the test mold smoothly and there is no displacement in the test mold, it means that the claw pole is a preliminary qualified claw pole, otherwise it is a defective claw pole; The initially qualified claw pole is tested by flaw detector and manual testing. If it passes the test, it is a qualified claw pole, otherwise it is a defective claw pole; The defective claw poles are inspected and selected by flaw detectors and manual inspection. If the defective claw poles only have surface defects, they are judged to be repairable. If the defective claw poles have cracks or are broken, they are judged to be irreparable.

6. A claw pole production and processing method according to claim 1, characterized in that: The repair includes the following sub-steps: If the defect on the repairable claw pole surface is a convex part, the convex part is first polished, and then fine-tuned by a machine tool. After the repair is completed, it is tested again. If it passes the test, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired. If the defect on the surface of the repairable claw pole is a sand hole, the claw pole is placed in a casting cavity and molten metal is injected to fill the sand hole on the surface of the claw pole. After the repair is completed, it is tested again. If the test is qualified, it is a qualified claw pole. Otherwise, it is judged that the claw pole cannot be repaired.

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