Rotor core lamination riveting clamp
By combining the design of pressure plates, mandrels and process sheets, the problems of high material cost, long cycle and lack of versatility of rotor core stacking and riveting fixtures have been solved, resulting in reduced material cost, shortened cycle and improved versatility, thus improving the efficiency of new product trial production.
Patent Information
- Application Number
- CN202422941482.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-30
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-11-30
AI Technical Summary
Existing rotor core stacking and riveting fixture designs suffer from high material costs, long manufacturing cycles, frequent maintenance and debugging, and lack of versatility, resulting in low efficiency in new product trial production.
The design adopts a combination of pressure plate, mandrel and process plate, eliminating the positioning plate, punch and rubber plate. Chromium-tungsten-manganese material is used, and the rotor core is processed through one-time and two-time riveting processes. The pressure plate and mandrel are made of the same material and can be tempered and quenched together. The rivet hole size of the process plate is larger than the core hole to accommodate adjustments for different positions and sizes.
Significantly reduce material costs, shorten manufacturing cycles, reduce maintenance and debugging needs, improve the progress of new product trial production and versatility, and achieve rapid and efficient rotor core processing.
Smart Images
Figure 1
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor manufacturing field, specifically a rotor iron core stacks rivet clamp. BACKGROUND
[0002] In the new product trial production stage, the quick sample making is successful, and it is very important to seize the market. The conventional rivet clamp design needs pressing plate, positioning plate, mandrel, punch, rubber pad (or spring), screw and other parts, and has the following shortcomings:
[0003] 1) high material cost: a set of clamp needs a mandrel, two pressing plates, two positioning plates, several punches, and corresponding rubber pads (or springs) and screws;
[0004] 2) long production cycle: the mandrel and the punch are different from other materials, and the hardness is also different, so they need to be tempered and quenched respectively, and the heat treatment time is long, and the size of the parts is large, so the completion time is long;
[0005] 3) frequent maintenance and adjustment of the clamp: before use, the initial height of the punch below the pressing plate needs to be adjusted according to the thickness of the iron core, and the height difference of all punches needs to be kept consistent. After a period of use, the rubber plate tension decreases (or the spring elasticity decreases), and it needs to be replaced and adjusted again. Otherwise, the effect of the punch on the rivet head is not good, the iron core piece is easy to pull out, the rebound force is large, and the rivet head is not pressed flat, and the size does not meet the requirements.
[0006] 4) no universality: the size and position of the rivet hole of the rotor iron core piece need to be redesigned. CONTENT OF THE UTILITY MODEL
[0007] The utility model aims at providing a rotor iron core stacks rivet clamp, which comprises a pressing plate, a mandrel, a process piece and a plurality of rivets.
[0008] The pressing plate comprises a lower pressing plate and an upper pressing plate.
[0009] The lower pressing plate is in a plate structure, the plate surface is circular, and an inner hole I penetrating the upper and lower plate surfaces is formed at the center of the plate surface.
[0010] Flanges are arranged at intervals on the inner hole I, the flanges are arranged towards the inner hole I and in a direction parallel to the axis direction of the inner hole I.
[0011] The structure of the upper pressing plate is the same as that of the lower pressing plate.
[0012] The mandrel is arranged in the inner hole I of the upper and lower pressing plates.
[0013] The rotor iron core to be processed is sleeved on the mandrel and arranged between the lower pressing plate and the upper pressing plate.
[0014] The rotor core to be processed comprises a plurality of core pieces, a plurality of rivet holes I are formed on the core pieces, and a rivet is arranged in the rivet hole I.
[0015] The rotor core to be processed and the upper and lower pressing plates are further provided with annular process pieces, and rivet holes II are arranged on the process pieces at positions corresponding to the rivet holes I.
[0016] The riveting process of the rotor core to be processed comprises primary riveting and secondary riveting.
[0017] In the primary riveting state, the annular process pieces are arranged between the rotor core to be processed and the upper and lower pressing plates, and the two ends of the rivet are in an expanded state in the rivet holes II of the process pieces.
[0018] In the secondary riveting state, the rotor core to be processed is in direct contact with the upper and lower pressing plates, and the two ends of the rivet are in a flanged state.
[0019] Further, the outer side wall of the mandrel is provided with outwardly open mounting grooves at intervals, and the mounting grooves are arranged at positions matched with the arrangement positions of the flanges of the pressing plates.
[0020] Further, the inner holes II of the rotor core and the process pieces are provided with fixing keys at intervals.
[0021] The arrangement positions of the fixing keys of the rotor core and the process pieces are matched with the arrangement positions of the flanges of the pressing plates.
[0022] Further, the material of the pressing plates is selected from chromium-tungsten-manganese.
[0023] Further, the inner hole I of the pressing plate is in clearance fit with the mandrel.
[0024] Further, the outer diameter of the pressing plate is 1-2 mm larger than the outer diameter of the process piece.
[0025] Further, the size of the rivet hole II of the process piece is 2-3 mm larger than the size of the rivet hole I of the rotor core.
[0026] Further, the material of the mandrel is selected from chromium-tungsten-manganese.
[0027] Further, the inner hole I of the mandrel is in clearance fit with the pressing plate, and the width of the mounting groove is 0.05 mm larger than the width of the fixing key of the core piece.
[0028] The technical effect of the utility model is self-evident, and the beneficial effects of the utility model are as follows.
[0029] 1) The material cost is reduced by more than 2 / 3: because the positioning plate, punch, rubber plate (or spring) and screw are cancelled, only a mandrel and two pressing plates are reserved;
[0030] 2)Manufacturing cycle is shortened by more than 1 / 2: because the material is reduced by 2 / 3, and the pressing plate and the mandrel are made of the same material, they can be tempered and quenched together, and the pressing plate also reduces the process of machining rivet holes, so the manufacturing time is shortened;
[0031] 3) The clamp does not need to be maintained and debugged: because a flat plate is used to press rivets integrally, there is no punch and rubber plate, so there is no need to debug, and if there are pressure marks on the pressing plate after long-term use, only the end face needs to be ground to eliminate the pressure marks, so that it can continue to be used, and there is no requirement for the thickness of the pressing plate, which can be ground multiple times, which is convenient for maintenance;
[0032] 4) Better universality: as long as the inner hole size of the rotor core piece is the same as the slot shape, and the large outer circle of the pressing plate can contain the outer circle of the new piece, regardless of the size and position of the rivet hole, the same set of tooling can be used, without the need for re-design, which improves the trial production progress of new products. BRIEF DESCRIPTION OF DRAWINGS
[0033] Figure 1 Figure 1 is a schematic diagram of a one-time riveting clamp for a rotor core;
[0034] Figure 2 Figure 2 is a partial enlarged view of Figure 1 Figure 3 is a schematic diagram of a two-time riveting clamp for a rotor core;
[0035] Figure 3 Figure 4 is a schematic diagram of a two-time riveting clamp for a rotor core;
[0036] Figure 4 (a) is a schematic diagram of a rotor core piece; Figure 4 (b) is a schematic diagram of a process piece;
[0037] Figure 5 (a) is a top view of a pressing plate; Figure 5 (b) is a front view of a pressing plate;
[0038] Figure 6 (a) is a front view of a mandrel; Figure 6 (b) is a top view of a mandrel.
[0039] In the figure: 101-pressing plate; 1011-lower pressing plate; 1012-upper pressing plate; 1013-inner hole I; 1014-flange; 102-mandrel; 2-process piece; 201-process piece I; 202-process piece II; 3-rotor core; 301-core piece; 4-rivets. DETAILED DESCRIPTION
[0040] The utility model will be further described below in combination with examples, but should not be understood as the above-mentioned subject range of the utility model is limited to the following examples. According to the ordinary technical knowledge and usual means in the art, make various substitutions and changes without departing from the above-mentioned technical thought of the utility model, all should be included in the protection scope of the utility model.
[0041] Example 1:
[0042] A rotor core stack riveting clamp, comprising a pressing plate 101, a mandrel 102, a process sheet 2 and a plurality of rivets 4.
[0043] The pressing plate 101 comprises a lower pressing plate 1011 and an upper pressing plate 1012.
[0044] The lower pressing plate 1011 is a plate structure, and the plate surface is circular and a through hole I1013 is formed in the center of the plate surface.
[0045] Flanges 1014 are arranged on the through hole I1013, and the flanges 1014 face the through hole I and are arranged in parallel to the axis direction of the through hole I1013.
[0046] The structure of the upper pressing plate 1012 is the same as that of the lower pressing plate 1011.
[0047] The mandrel 102 is arranged in the through hole I of the upper and lower pressing plates.
[0048] The rotor core 3 to be processed is sleeved on the mandrel 102 and arranged between the lower pressing plate 1011 and the upper pressing plate 1012.
[0049] The rotor core 3 to be processed comprises a plurality of core sheets 301, a plurality of rivet holes I are formed on the core sheets 301, and the rivet holes I are provided with rivets 4.
[0050] The rotor core 3 to be processed and the upper and lower pressing plates are further provided with annular process sheets 2, and the process sheets 2 are provided with rivet holes II at positions corresponding to the rivet holes I.
[0051] The stack riveting process of the rotor core 3 to be processed comprises primary stack riveting and secondary stack riveting.
[0052] In the primary stack riveting state, the annular process sheet 2 is arranged between the rotor core 3 to be processed and the upper and lower pressing plates, and the two ends of the rivet 4 are expanded in the rivet hole II of the process sheet 2 by pressing the upper pressing plate 1012.
[0053] In the secondary riveting state, the process piece 2 is taken out, the rotor core 3 to be processed is in direct contact with the upper and lower pressing plates, the upper pressing plate 1012 is continuously pressed, the both ends of the rivet 4 are turned up, the rivet 4 is flattened, and the rivet 4 is lower than the end surface of the rotor core 3.
[0054] Embodiment 2:
[0055] The main structure of the embodiment is the same as that of any one of Embodiments 1-2, further, the outer side wall of the mandrel 102 is provided with outwardly opening mounting grooves at intervals, and the mounting grooves are arranged at positions matched with the arrangement positions of the flanges of the pressing plate 101.
[0056] Embodiment 3:
[0057] The main structure of the embodiment is the same as that of any one of Embodiments 1-2, further, the rotor core 3 and the inner hole II of the process piece 2 are provided with fixing keys at intervals.
[0058] The arrangement positions of the fixing keys of the rotor core 3 and the process piece 2 are matched with the arrangement positions of the flanges of the pressing plate 101.
[0059] Embodiment 4:
[0060] The main structure of the embodiment is the same as that of any one of Embodiments 1-3, further, the pressing plate 101 is made of chromium tungsten manganese, and is processed through turning, quenching, flat grinding and wire cutting processes.
[0061] Embodiment 5:
[0062] The main structure of the embodiment is the same as that of any one of Embodiments 1-4, further, the inner hole I 1013 of the pressing plate 101 is in clearance fit with the mandrel 102.
[0063] Embodiment 6:
[0064] The main structure of the embodiment is the same as that of any one of Embodiments 1-5, further, the outer diameter size of the pressing plate 101 is 1-2 mm larger than the outer diameter size of the process piece 2.
[0065] Embodiment 7:
[0066] The main structure of the embodiment is the same as that of any one of Embodiments 1-6, further, the size of the rivet hole II of the process piece 2 is 2-3 mm larger than the size of the rivet hole I of the rotor core 3.
[0067] Embodiment 8:
[0068] The main structure of the embodiment is the same as that of any one of Embodiments 1-7, further, the mandrel 102 is made of chromium tungsten manganese, and is processed through turning, quenching, outer diameter grinding and wire cutting processes.
[0069] Embodiment 9:
[0070] The main structure of the embodiment is the same as any one of embodiments 1-8, further, the inner hole I1013 of the core shaft 102 and the pressing plate 101 is a clearance fit, and the installation groove width is greater than the key width of the iron core piece 301 by 0.05 mm.
[0071] Embodiment 10:
[0072] A use process of the rotor iron core stacking and riveting clamp described in any one of embodiments 1-9, comprising the following steps:
[0073] 1) Insert the core shaft 102 into the inner hole I of the lower pressing plate 1011 for positioning, and then place a process piece I201 on the surface of the lower pressing plate 1011 along the core shaft 102;
[0074] 2) Stack several iron core pieces on the process piece I201 through the core shaft 102;
[0075] 3) Insert the standard rivet 4 into the rivet hole I of the iron core piece;
[0076] 4) Place a process piece II202 on the several iron core pieces assembled with the rivet 4, and then insert the upper pressing plate 1012 into the core shaft 102;
[0077] 5) Put the iron core stacking tool into the press and press tightly three times, each time rotating 120 degrees, to complete one stacking and riveting;
[0078] 6) Take out the process piece II202 and the process piece I201 from the clamp, and then assemble the rotor iron core 3 and the pressing plate 101 back to the core shaft 102 in place;
[0079] 7) Put the iron core stacking tool into the press again and press tightly twice, each time rotating 180 degrees, to complete two stacking and riveting.
[0080] Embodiment 11:
[0081] The main structure of the embodiment is the same as any one of embodiments 1-10, further, the embodiment discloses a rotor iron core stacking and riveting clamp, which is simple in structure, accurate in positioning, economical and applicable, and characterized by comprising a pressing plate 101, a core shaft 102, and process pieces (matched with rotor iron core pieces).
[0082] The clamp completes the rotor iron core manufacturing in two times of stacking and riveting, the first time is to press the process pieces on the upper and lower end surfaces of the iron core, and the second time is to press the iron core after removing the process pieces, and the specific process steps are as follows:
[0083] 1) Preparation:
[0084] ①Core shaft 102 is inserted into the hole of the pressing plate 101 for positioning, and then a piece of process sheet is placed on the core shaft on the pressing plate 101;
[0085] ②The neatly arranged and quantified iron core sheet is stacked into the core shaft 102;
[0086] ③The marked rivet is inserted into the corresponding hole of the iron core;
[0087] ④After inserting the rivet, a piece of process sheet is placed, and then the pressing plate 101 is covered.
[0088] 2) One-time riveting:
[0089] The stacked iron core workpiece is placed as a whole into the press and pressed three times, each time rotating 120 degrees.
[0090] 3) Two-time riveting:
[0091] ①The process sheet is removed from the clamp, and then the iron core and the pressing plate 101 are reassembled on the core shaft 102;
[0092] ②The stacked iron core workpiece is placed as a whole into the press and pressed two times, each time rotating 180 degrees. Thus, the stator core processing is completed.
[0093] In the embodiment, the rotor core riveting clamp is composed of two types of components and process sheets. The material for manufacturing the workpiece is selected to have sufficient strength and rigidity, and the process sheet can be directly selected from the edge scrap of the rotor core sheet.
[0094] Example 12:
[0095] The main structure of the embodiment is the same as any one of examples 1-11, further, Figure 1 Figure is a one-time riveting diagram of the rotor core riveting clamp.
[0096] By pressing the upper pressing plate, the two ends of the rivet are expanded in the hole of the process sheet (acting as a heading effect), and the purpose is to fully turn the two ends of the rivet after the second pressing, and to securely lock the iron core, ensuring that the iron core sheet is tightly riveted and not easily pulled apart.
[0097] Figure 3 Figure is a two-time riveting diagram of the rotor core riveting clamp.
[0098] The process sheet is removed, and the upper pressing plate is pressed again to fully turn the two ends of the rivet, while flattening the rivet so that the rivet is not higher than the end surface of the iron core, ensuring the size of the iron core.
[0099] Figure 4 (a), Figure 4 (b) are respectively a rotor core sheet and a process sheet diagram.
[0100] The process piece is made only by referring to the inner hole and slot size of the rotor core piece, rivet hole position and size, outer circle size, and the rest of the size can be ignored, see the figure. Among them, the rivet hole position of the two pieces is the same, but the rivet hole size of the process piece is 2-3mm larger than that of the rotor core piece, the purpose is to leave space for the rivet head to expand when it is upset.
[0101] Figure 5 (a)、 Figure 5 (b) is the plan view and front view of the pressing plate.
[0102] The pressing plate 101 is made of CrWMn material, processed by turning, quenching, flat grinding, and wire cutting process, with a quenching hardness of 50-55HRC, the inner hole size is clearance fit with the mandrel 102, with a tolerance value of 0.03-0.05mm, and the outer circle size is 1-2mm larger than the process piece size.
[0103] Figure 6 (a)、 Figure 6 (b) is the front view and plan view of the mandrel.
[0104] The mandrel 102 is made of CrWMn material, processed by turning, quenching, outer circle grinding, and wire cutting process, with a quenching hardness of 50-55HRC, the outer circle size is clearance fit with the rotor core piece, with a tolerance value of 0.02-0.04mm, and the slot width is 0.05mm larger than the key size of the core piece.
Claims
1. A rotor core stack riveting jig characterized by: It comprises a pressing plate (101), a mandrel (102), a process sheet (2) and several rivets (4); The pressing plate (101) comprises a lower pressing plate (1011) and an upper pressing plate (1012); The lower pressing plate (1011) is a plate structure, the plate surface is circular, and a through hole I (1013) is arranged at the center of the plate surface; The inner hole I (1013) is provided with a flange (1014) at intervals, the flange (1014) faces the inner hole I and is arranged in parallel to the axis direction of the inner hole I (1013); The structure of the upper pressing plate (1012) is the same as that of the lower pressing plate (1011); The mandrel (102) is arranged in the inner hole I of the upper and lower pressing plates; The rotor core (3) to be processed is sleeved on the mandrel (102) and arranged between the lower pressing plate (1011) and the upper pressing plate (1012); The rotor core (3) to be processed comprises several core sheets (301), a plurality of rivet holes I are arranged on the core sheet (301), and the rivet (4) is arranged in the rivet hole I; The rotor core (3) to be processed and the upper and lower pressing plates are further provided with a circular ring-shaped process sheet (2) respectively, and the rivet hole II is arranged on the process sheet (2) at a position corresponding to the rivet hole I; The riveting process of the rotor core (3) to be processed comprises primary riveting and secondary riveting: In the primary riveting state, the circular ring-shaped process sheet (2) is arranged between the rotor core (3) to be processed and the upper and lower pressing plates, and the two ends of the rivet (4) are in an expanded state in the rivet hole II of the process sheet (2); In the secondary riveting state, the rotor core (3) to be processed is in direct contact with the upper and lower pressing plates, and the two ends of the rivet (4) are in a flanged state.
2. A rotor core stack clamping jig according to claim 1, characterized by: The outer side wall of the mandrel (102) is provided with an outwardly open mounting groove at intervals, and the mounting groove is arranged at a position matched with the flange of the pressing plate (101).
3. A rotor core stack clamping jig according to claim 1 or 2, characterized in that: The inner hole II of the rotor core (3) and the process sheet (2) is provided with a fixing key at intervals; The setting position of the fixing key of the rotor core (3) and the process sheet (2) is matched with the setting position of the flange of the pressing plate (101).
4. A rotor core stack clamping jig according to claim 1, characterized by: The manufacturing material of the pressing plate (101) is selected from chromium tungsten manganese.
5. A rotor core stack clamping jig according to claim 1, characterized by: The inner hole I (1013) of the pressing plate (101) is in clearance fit with the mandrel (102).
6. A rotor core stack clamping jig according to claim 1, characterized by: The outer diameter of the pressing plate (101) is 1-2mm larger than that of the process sheet (2).
7. A rotor core stack clamping jig according to claim 1, characterized by: The size of the rivet hole II of the process sheet (2) is 2-3mm larger than that of the rivet hole I of the rotor core (3).
8. A rotor core stack clamping jig according to claim 1, characterized by: The manufacturing material of the mandrel (102) is selected from chromium tungsten manganese.
9. A rotor core stack clamping jig according to claim 2, characterized by: The inner hole I (1013) of the mandrel (102) is in clearance fit with the pressing plate (101), and the width of the mounting groove is 0.05mm larger than the width of the fixing key of the core sheet (301).