Die with cambered pre-tightened concave die edge micro-elasticity adjustment die and production method

Abstract

The present application is suitable for the technical field of mould, and provides a female die blade edge micro-elasticity adjusting mould with cambered surface pre-tightening, which comprises a female die and a backing plate, a plurality of blade edges are arranged and formed on the female die, a convex cambered surface is arranged on the lower surface of the female die, a plurality of threaded holes are arranged and formed on the female die and the backing plate, pre-tightening screws are installed in the threaded holes, the convex cambered surface is arranged on the lower surface of the female die, the pre-tightening screws can make the female die slightly expand when the pre-tightening screws are installed, the convex cambered surface can offset the micro-deformation of the female die caused by the sinking cavity of the mould at the moment of punching the stator and rotor, the reverse compensation of the pre-tightening force is realized, so that the size and burr of the stator and rotor are stable, the burr problem caused by punching the stator and rotor is effectively solved, and when the subsequent mould is worn, the expansion amount of the female die can be changed by adjusting the pre-tightening force of the plurality of screws, so that the service life of the mould is increased, compared with the way of changing the size of the male die in the prior art, the present application has the advantages of low cost and convenience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to a concave die edge micro-elasticity adjusting mold with arc surface pre-tightening and a production method. BACKGROUND

[0002] An ultra-high efficiency motor is a type of motor that can provide high power output and high efficiency at lower energy consumption. This motor usually uses advanced materials and designs to reduce energy loss and improve conversion efficiency. Ultra-high efficiency motors can provide better performance and energy saving in many applications, such as electric vehicles, industrial production equipment, and household appliances.

[0003] The stator and rotor punching sheets of the ultra-high efficiency motor have the characteristics of hardness, brittleness, thinness, large slot shape, and large number of slots. Therefore, the punching force required for the stator and rotor punching sheets of this type of motor is much larger than that of ordinary products, and the mold strength is also poor due to the high number of slots and large slot shape. During the punching process, the central part of the stator and rotor punching sheets deforms elastically, the die edge closing effect is obvious, the die core deforms and sinks at the moment of punching, and after the punching is completed, the die edge closing is locked, and the die edge periphery is prone to have large burrs, which seriously affects the quality of the stator and rotor punching sheets. Moreover, in the prior art, when the mold is worn out after long-term use, the size of the punch is usually replaced to solve the problem. This method not only has the defect of high cost, but also the processed products will have the defect of reduced slot fullness rate in the future. Therefore, a concave die edge micro-elasticity adjusting mold with arc surface pre-tightening is proposed to solve the above technical problems. SUMMARY

[0004] The purpose of the present application is to provide a concave die edge micro-elasticity adjusting mold with arc surface pre-tightening to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A concave die edge micro-elasticity adjusting mold with arc surface pre-tightening, comprising a concave die and a backing plate, a plurality of edges are arrayed on the concave die, and a convex arc surface is arranged on the lower surface of the concave die. A plurality of threaded holes are also arrayed on the concave die and the backing plate, and pre-tightening screws are installed in the threaded holes.

[0007] As a further solution of the present application: the number of distribution circles of the threaded holes is two, i.e. inner and outer circles, inner circle screws are installed in the inner circle, and outer circle screws are installed in the outer circle.

[0008] A production method of a concave die edge micro-elasticity adjusting mold with arc surface pre-tightening, comprising the following steps:

[0009] S1. Determine and mark the position of the hole on the concave groove and the backing plate, wherein the hole is distributed in two circles, i.e. inner and outer circles, and the number and size of the hole are determined according to the size of the concave die;

[0010] S2. Using a drill bit of appropriate size to punch a hole at the mark, and then selecting a thread tap of appropriate size to start tapping in the pre-punched hole;

[0011] S3. The concave die is fastened with the inner ring screw using a special tool, and then the convex arc surface of the concave die is ground using the tool, wherein the height of the convex arc surface is determined according to the deformation amount of the concave die at the moment of punching;

[0012] S4. The concave die with the ground convex arc surface is combined with the die lower pad, and fastened using the outer ring screw, wherein, in order to ensure that the fastening forces of the screws are consistent, the bench worker uses an electronic torque wrench to assemble. As a further scheme of the present application:

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] The present application sets a convex arc surface on the lower surface of the groove. When the pre-tightening screw is installed, the pre-tightening screw can cause the concave die to expand slightly. At the moment of punching the stator and rotor punching sheet, the convex arc surface can offset the slight deformation of the die sink cavity, realize reverse compensation of the pre-tightening force, and thus stabilize the size and burr of the stator and rotor, effectively solve the burr problem caused by the punching of the stator and rotor, and when the subsequent die wears, the expansion amount of the concave die can be changed by adjusting the pre-tightening force of the plurality of screws, thereby increasing the service life of the die. Compared with the way of changing the size of the convex die in the prior art, the present application has the advantages of low cost and convenience. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a side view of a concave die blade edge micro-elasticity adjustment die with arc surface pre-tightening.

[0016] Figure 2 It is a top view of a concave die blade edge micro-elasticity adjustment die with arc surface pre-tightening.

[0017] Figure 3 It is a structure schematic diagram of the concave die and the pad before pre-tightening in the present application.

[0018] Figure 4 It is a structure schematic diagram of the concave die and the pad after screw fastening in the present application.

[0019] In the figure: 1-concave die, 2-convex arc surface, 3-inner threaded hole, 4-outer threaded hole, 5-blade edge, 6-inner ring screw, 7-outer ring screw, 8-pad. DETAILED DESCRIPTION

[0020] The technical scheme of the present application will be further described in detail below in combination with specific embodiments.

[0021] Please refer to Figures 1-4The utility model relates to a micro-elasticity adjusting die with cambered surface pre-tightening of a female die 1 blade edge 5, comprising a female die 1 and a backing plate 8, a plurality of threaded holes, pre-tightening screws are installed in the threaded holes, a convex cambered surface 2 is arranged on the lower surface of the recess, when the pre-tightening screws are installed, the pre-tightening screws can make the female die 1 slightly expand, the convex cambered surface 2 can offset the slight deformation of the die sinking cavity generated in the moment of stator and rotor punching, the reverse compensation of the pre-tightening force is realized, so that the size and burr of the stator and rotor are stable, the burr problem generated by the stator and rotor punching is effectively solved, and when the subsequent die wears, the expansion amount of the female die 1 can be changed by adjusting the pre-tightening force of the plurality of screws, so that the service life of the die is increased, compared with the way of changing the size of the male die in the prior art, the utility model has the advantages of low cost and convenience.

[0022] Specifically, the distribution circle number of the threaded holes is two inner and outer circles, the inner circle is provided with inner circle screws 6, and the outer circle is provided with outer circle screws 7.

[0023] A production method of a micro-elasticity adjusting die with cambered surface pre-tightening of a female die 1 blade edge 5 comprises the following steps:

[0024] S1. determining and marking the position of holes on the recess and the backing plate 8, wherein the holes are distributed in two inner and outer circles, and the number and size of the holes are determined according to the size of the female die 1;

[0025] S2. using a drill bit with a suitable size to drill holes at the marked positions, and then selecting a thread tapping tool with a suitable size to start tapping in the pre-drilled holes;

[0026] S3. fastening the female die 1 and the special tool by using the inner circle screws 6, and then grinding the convex cambered surface 2 of the female die 1 by using the tool, wherein the height of the convex cambered surface 2 is determined according to the deformation amount of the female die 1 in the punching moment;

[0027] S4. fastening the female die 1 with the ground convex cambered surface 2 and the die lower backing plate 8 by using the outer circle screws 7, wherein the bench worker uses an electronic torque wrench to assemble to ensure that the fastening forces of the screws are consistent.

[0028] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other embodiments without departing from the scope of the application. The embodiments are therefore to be seen as exemplary and in no way restrictive, the scope of the application being defined by the claims below rather than by the above description, and all variations falling within the meaning and range of equivalency of the essential characteristics of the claims are therefore intended to be embraced therein.

[0029] Furthermore, it should be understood that although the description is made according to embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and a person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A die (1) with cambered pre-tensioned die edge (5) micro-elastic adjustment die comprising a die (1) and a backing plate (8), characterized in that, The concave die (1) is provided with a plurality of blade edges (5) in an array, and the lower surface of the concave die (1) is provided with a convex arc surface (2). The concave die (1) and the backing plate (8) are both provided with a plurality of threaded holes, and the threaded holes are provided with pre-tightening screws.

2. The die (1) with arc surface pre-tensioned, micro-elastic adjustment of the cutting edge (5) according to claim 1, characterized in that, The threaded holes include inner threaded holes (3) and outer threaded holes (4), and a plurality of inner threaded holes (3) and outer threaded holes (4) are provided in a circumferential array. The inner threaded holes (3) are provided with inner ring screws (6), and the outer threaded holes (4) are provided with outer ring screws (7).

3. The method for producing a die with arc-shaped pre-tightened concave die (1) and micro-elastic adjustment cutting edge (5) according to claim 1, characterized in that, The method comprises the following steps: S1. The positions of the holes are determined and marked on the concave groove and the backing plate (8). The holes are distributed in two circles, and the number and size of the holes are determined according to the size of the concave die (1); S2. A drill bit with a suitable size is used to drill holes at the marked positions, and a thread tapping tool with a suitable size is selected to tap the pre-drilled holes; S3. The concave die (1) is fastened with the special tooling by using the inner ring screws (6), and then the convex arc surface (2) of the concave die (1) is ground by using the tooling. The height of the convex arc surface (2) is determined according to the deformation amount of the concave die (1) at the moment of punching; S4. The concave die (1) with the ground convex arc surface (2) is combined with the lower backing plate (8) of the die, and the outer ring screws (7) are used for fastening. In order to ensure that the fastening forces of the screws are consistent, the fitter uses an electronic torque wrench to assemble the components.

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