CN107984039A

CN107984039A - A kind of progressive die Screw thread process method

Info

Publication number: CN107984039A
Application number: CN201711369976.6A
Authority: CN
Inventors: 罗光炯; 李展前; 肖德强
Original assignee: AECC South Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2018-05-04
Anticipated expiration: 2037-12-19
Also published as: CN107984039B

Abstract

A kind of progressive die Screw thread process method, it includes the following steps step A, a tapping device is provided in progressive die, step B, when material strip is sent to the tapping device of step A offers in progressive die, tapping device operation, completes screw thread process operation.A kind of progressive die Screw thread process method provided by the present invention in the punching course of progressive die, it can be achieved that complete screw thread process, so that beneficial to the manless production for realizing high-precision motor rotor installation housing.

Description

Progressive die thread machining method

Technical Field

The invention relates to the technical field of machine manufacturing, in particular to a method for finishing horizontal and vertical thread processing on a blank in a progressive die.

Background

The motor mounting case is generally formed by processing a plate material through a blanking process, and fig. 1 is a schematic structural diagram of the motor mounting case; 3 FIG. 32 3 is 3 a 3 schematic 3 view 3 of 3 the 3 A 3- 3 A 3 rotation 3 section 3 structure 3 of 3 FIG. 31 3; 3 FIG. 3 is a schematic view from the direction B of FIG. 1; referring to fig. 1-3, the motor mounting case 1 has a complex profile, and is a cylindrical structure with an open bottom, a horizontal threaded hole 11 is formed in a side wall, a skirt 100 is provided with a plurality of through holes 12 and step threaded holes 13, a plurality of notches are formed in an outer edge of the skirt 100, a mounting hole 14, a waist-shaped groove 15 and a recessed portion 16 are formed in a top surface, and a step hole 17 is formed in a center of the top surface.

3 the 3 existing 3 manufacturing 3 method 3 of 3 the 3 motor 3 mounting 3 shell 3 is 3 a 3 single 3 die 3 multiple 3 stamping 3, 3 fig. 3 4 3 is 3 a 3 schematic 3 diagram 3 of 3 the 3 principle 3 of 3 the 3 existing 3 manufacturing 3 process 3 of 3 the 3 motor 3 mounting 3 shell 3 shown 3 in 3 fig. 31 3, 3 fig. 3 4 3 shows 3 a 3 schematic 3 diagram 3 of 3 a 3 top 3 view 3 structure 3 of 3 a 3 blank 3 completed 3 in 3 each 3 step 3 of 3 the 3 existing 3 manufacturing 3 process 3 and 3 a 3 corresponding 3 schematic 3 diagram 3 of 3 a 3 rotating 3 cross 3- 3 sectional 3 structure 3 at 3 a 3- 3 a 3 position 3 shown 3 in 3 fig. 31 3- 32 3, 3 as 3 shown 3 in 3 fig. 3 4 3, 3 the 3 existing 3 manufacturing 3 process 3 is 3 divided 3 into 3 12 3 steps 3, 3 which 3 are 3 sequentially 3: 3 Blanking → deep drawing → reverse deep drawing → coarse finishing → trimming → punching → hole flanging → side hole punching → bottom tapping → side tapping. 12 sets of dies are used, and the use of the dies in each step is sequentially explained as follows:

blanking die: a circular slab is prepared.

A first drawing die: and forming a cylinder main structure.

The method comprises the following steps of (1) reversely drawing a die, a second drawing die, a rough die and a finishing die: the top surface profile is formed, i.e., the recess 16 is formed and prepared for the stepped hole 17.

Trimming die: forming a notch in the skirt 100.

Punching a die: a through hole 12, a mounting hole 14, a kidney-shaped groove 15 and a stepped hole 17 are formed.

And (3) hole flanging die: and forming a step blank hole of the step threaded hole 13.

Side hole punching die: and forming a blank hole of the horizontal threaded hole 11.

Bottom tapping die: and forming a step threaded hole 13.

Side tapping die: the horizontal threaded hole 11 is formed.

The existing manufacturing method needs more operators and is low in labor production efficiency, three steps except for side hole punching, bottom surface tapping and side surface tapping are not realized in a punching mode, and for example, the two steps of the bottom surface tapping and the side surface tapping are that a blank is fixedly placed on a die and then is tapped by tapping equipment. Other steps are all processed by adopting a stamping mode, the influence of human factors is large (manual feeding) in the product stamping process, and the qualification rate of the finished product size of the motor stator and rotor mounting shell is difficult to ensure.

The progressive die is a multi-task progressive die which can include a plurality of processes such as blanking, bending and drawing in a single die, and has high productivity.

For the motor mounting shell shown in fig. 1, nine other steps except the three steps of side hole punching, bottom surface tapping and side surface tapping in the existing manufacturing process can be easily designed into a set of progressive die by simply modifying the existing step die, but because the existing progressive die process does not generally provide thread processing capability, how to integrate the three steps of side hole punching, bottom surface tapping and side surface tapping, particularly the two steps of bottom surface tapping and side surface tapping for processing threads, into the progressive die becomes a problem to be solved.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a progressive die thread processing method to reduce or avoid the aforementioned problems.

In order to solve the technical problems, the invention provides a progressive die thread machining method which is used for carrying out thread machining on a motor mounting shell 1 in a progressive die, wherein the motor mounting shell is of a cylindrical structure with an opening at the bottom, a horizontal threaded hole is formed in the side wall of the motor mounting shell, a plurality of through holes and step threaded holes are formed in the skirt edge, a plurality of notches are formed in the outer edge of the skirt edge, a mounting hole, a kidney-shaped groove and a concave part are formed in the top surface of the skirt edge, and a step hole is formed in the center of the top surface of the skirt edge

Step A, providing a tapping device in a progressive die, wherein the tapping device 5 comprises a tapping lower die and a tapping upper die, the tapping upper die comprises an upper pressing piece, an active screw, a first nitrogen spring and at least one first compression roller, the upper pressing piece is used for pressing and positioning a blank and is connected with an upper die plate of the progressive die through an upper pneumatic spring, the active screw is fixedly connected with the upper die plate, the tapping lower die comprises a lower supporting piece, a retainer plate, a side tapping base, a tapping support, at least one first transmission screw is fixedly connected with the bottom of the retainer plate, the lower die plate is provided with a first transmission tooth, corresponding to the first transmission screw, provided with a central threaded hole, the lower supporting piece is fixedly connected with a lower die plate of the progressive die, the lower supporting piece is fixedly connected with the lower die plate of the progressive die and is used for positioning the blank, the retainer plate is connected with the lower die plate through a lower pneumatic spring and is slidably connected with the lower supporting plate, the retainer plate is fixedly connected with the lower tapping support, the bottom of The first tapping screw tap is connected with the first transmission gear through a first driven gear; the tapping support is provided with a second tapping screw tap capable of moving horizontally, the second tapping screw tap is sleeved in a first vertical gear, the first vertical gear is meshed with a second vertical gear, the second vertical gear is connected with a first horizontal conveying gear provided with a first coaxial horizontal bevel gear through a first coaxial vertical bevel gear, the first vertical bevel gear is meshed with the first horizontal bevel gear, the first horizontal conveying gear is meshed with a second driving wheel through a second intermediate gear, and a threaded hole corresponding to the driving screw is formed in the center of the second driving wheel.

And step B, when the material belt is conveyed to the tapping device provided in the step A in the progressive die, the tapping process is that when the upper die plate moves downwards under the action of the punch press, the upper pressing piece is contacted with the top surface of the blank to press the blank to move downwards, namely the first press roller simultaneously presses the retainer plate to move downwards, meanwhile, the first nitrogen spring presses the tapping support to move downwards, and in the downward moving process, the driving screw rod cannot push the second driving wheel to rotate.

When the blank is sleeved into the lower support piece, in the downward operation process of the retainer plate, the downward displacement of the first transmission screw drives the first transmission gear to rotate through the central threaded hole of the first transmission gear, so that the first tapping screw tap is driven to rotate through the first driven wheel, the blank continues to move downward after contacting with the first tapping screw tap, namely the first tapping screw tap moves upward relative to the blank, and the tapping of the step threaded hole is completed,

when the upper pressing part moves in place, namely the upper pressing part and the lower supporting part complete stable clamping on the blank, the blank completely enters the lower supporting part downwards and is fixed, the lower pneumatic spring stops deforming, the tapping support also moves in place and stops relative displacement in the vertical direction with the lower template, at the moment, the upper pneumatic spring continues deforming, namely the upper template continues displacing, the first nitrogen spring also continues deforming to push the driving screw rod to move downwards, the linear motion of the driving screw rod drives the second transmission wheel to rotate, and the second middle gear, the first horizontal transmission gear, the first horizontal bevel gear, the first vertical bevel gear and the second vertical bevel gear drive the first vertical gear to rotate in sequence, so that the horizontal rotary feeding motion of the second tapping screw tap on the blank corresponding to the position of the horizontal threaded hole 11 is converted, thereby completing tapping of the horizontal threaded hole.

And in the process of upward operation of the upper template, the process is reversely operated, and finally the thread machining operation is completed.

The progressive die thread processing method provided by the invention can realize the thread processing in the stamping process of the progressive die, thereby being beneficial to realizing the unmanned production of the stator and rotor mounting shell of the high-precision motor and greatly reducing the requirements on stamping workers and stamping equipment. The production efficiency is greatly improved, and the economic benefit is obvious. Meanwhile, the influence of unstable factors such as manual operation and the like is eliminated, and the manufacturing precision and the quality stability of the product are improved.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,

FIG. 1 is a schematic structural view of a motor mounting housing;

3 FIG. 32 3 is 3 a 3 schematic 3 view 3 of 3 the 3 A 3- 3 A 3 rotation 3 section 3 structure 3 of 3 FIG. 31 3; 3

FIG. 3 is a schematic view from the direction B of FIG. 1;

FIG. 4 is a schematic view of a prior art manufacturing process for the motor mounting shell of FIG. 1;

fig. 5 is a schematic cross-sectional structural view illustrating a method of progressive die thread processing according to an embodiment of the present invention.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

FIG. 1 is a schematic structural view of a motor mounting housing; 3 FIG. 32 3 is 3 a 3 schematic 3 view 3 of 3 the 3 A 3- 3 A 3 rotation 3 section 3 structure 3 of 3 FIG. 31 3; 3 FIG. 3 is a schematic view from the direction B of FIG. 1; fig. 5 is a schematic cross-sectional structural view illustrating a method of progressive die thread processing according to an embodiment of the present invention. To better illustrate the working principle of the tapping device provided by the present invention, fig. 5 shows a schematic diagram of a horizontal partial sectional structure and a schematic diagram of a vertical partial sectional structure of four states of the tapping device used in the method from die opening to die closing in a comparison manner, and as shown in fig. 1-3 and 5, the present invention provides a progressive die thread processing method for performing thread processing on a motor mounting shell 1 in a progressive die, wherein the motor mounting shell 1 is a cylindrical structure with an open bottom, a side wall is provided with a horizontal threaded hole 11, a skirt 100 is provided with a plurality of through holes 12 and step threaded holes 13, an outer edge of the skirt 100 is provided with a plurality of notches, a top surface is provided with a mounting hole 14, a kidney-shaped groove 15 and a depressed part 16, and a center of the top surface is provided with a step hole 17, and the method comprises the following steps

Step A, providing a tapping device 5 in a progressive die, wherein the tapping device 5 comprises a lower tapping die and an upper tapping die, the upper tapping die comprises an upper pressing piece 51 used for pressing and positioning a blank and connected with an upper die plate 201 of the progressive die through an upper pneumatic spring 21, a driving screw 52 fixedly connected with the upper die plate 201, a first nitrogen spring 54 and at least one first pressing roller 310 ', the lower tapping die comprises a lower supporting piece 53 fixedly connected with a lower die plate 202 of the progressive die and used for positioning the blank, a retainer plate 300 ' connected with the lower die plate 202 through a lower pneumatic spring 22 and slidably connected with the lower supporting piece 53, a side tapping base 511 fixedly connected with the lower die plate 202, a tapping support 512 connected with the lower die plate 202 through a rectangular spring 23 and slidably connected with the side tapping base 511, and at least one first driving screw 301 is fixedly connected with the bottom of the retainer plate 300 ', the lower template 202 is provided with a first transmission gear 501 which is provided with a central threaded hole and corresponds to the first transmission screw 301, and a first tapping screw tap 503 for machining the step threaded hole 13, wherein the first tapping screw tap 503 is connected with the first transmission gear 501 through a first driven wheel 502; the tapping support 512 is provided with a second tapping screw tap 513 capable of moving horizontally, the second tapping screw tap 513 is sleeved in a first vertical gear 514, the first vertical gear 514 is meshed with a second vertical gear 515, the second vertical gear 515 is connected with a first horizontal transmission gear 518 provided with a first coaxial horizontal bevel gear 517 through a first coaxial vertical bevel gear 516, the first vertical bevel gear 516 is meshed with the first horizontal bevel gear 517, the first horizontal transmission gear 518 is meshed with a second transmission wheel 521 through a second intermediate gear 519, and the center of the second transmission wheel 521 is provided with a threaded hole corresponding to the driving screw 52.

In step B, when the material strip is conveyed to the tapping device 5 provided in step a in the progressive die, the tapping process is that, when the upper die plate 201 moves downward under the action of the punch press, the upper pressing member 51 contacts with the top surface of the blank (i.e. the top surface of the material strip) to press the blank to move downward, that is, the retainer plate 300 is simultaneously pressed downward by the first pressing roller 310', and the tapping support 512 is simultaneously pressed downward by the first nitrogen spring 54, during the downward movement, the driving screw 52 does not push the second driving wheel 521 to rotate.

When the blank is sleeved on the lower support 53, during the downward movement of the retainer plate 300, the downward displacement of the first transmission screw 301 drives the first transmission gear 501 to rotate through the central threaded hole of the first transmission gear 501, so that the first driven wheel 502 drives the first tapping screw tap 503 to rotate, the blank continues to move downward after contacting the first tapping screw tap 503, that is, the first tapping screw tap 503 moves upward relative to the blank, thereby completing the tapping of the stepped threaded hole 13,

in this embodiment, four stepped threaded holes 13 are uniformly formed in the skirt 100 of the motor mounting housing 1 along the circumferential direction, so that two first transmission screws 301 are fixedly connected to the bottom of the retainer plate 300', the lower die plate 202 is provided with two first transmission gears 501, and each first transmission gear 501 is engaged with two first driven wheels 502, that is, each first transmission gear 501 drives two first tapping taps 503.

When the upper pressing member 51 moves to the proper position, that is, after the upper pressing member 51 and the lower supporting member 53 complete stable clamping of the blank, the blank (i.e., the material strip) completely enters the lower supporting member 53 downward and is fixed, the lower pneumatic spring 22 stops deforming, the tapping support 512 also moves to the proper position and stops relative displacement in the vertical direction with respect to the lower die plate 202, at this time, the upper pneumatic spring 21 continues deforming, that is, the upper die plate 201 continues displacing, the first nitrogen spring 54 also continues deforming, the driving screw 52 is pushed to move downward, the linear motion of the driving screw 52 drives the second driving wheel 521 to rotate, and the second driving wheel 521 rotates through the second intermediate gear 519, the first horizontal transmission gear 518, the first horizontal bevel gear 517, the first vertical bevel gear 516, and the second vertical gear 515 in sequence to drive the first vertical gear 514 to rotate, so as to convert the second tapping tap 513 into horizontal rotation at the position corresponding to the horizontal threaded hole 11 on the blank And the movement is given, thereby completing the tapping of the horizontal threaded hole 11.

In the process that the upper die plate 201 moves upwards, the process is reversely operated, and finally the thread machining operation is completed.

The upper pneumatic spring may be 3 in number and may have a load of 400 n, the lower pneumatic spring 22 may be 4 in number and may have a load of 1700 n, the first nitrogen spring 54 may be 2 in number and may have a load of 3200 n, and the rectangular spring 23 may be 2 in number and may have a load of 400 n.

It should be appreciated by those of skill in the art that while the present invention has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including technical equivalents which are related to the embodiments and which are combined with each other to illustrate the scope of the present invention.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.

Claims

1. A progressive die thread machining method is characterized by being used for carrying out thread machining on a motor mounting shell 1 in a progressive die, wherein the motor mounting shell is of a cylindrical structure with an opening at the bottom, a horizontal threaded hole is formed in the side wall, a plurality of through holes and step threaded holes are formed in the skirt edge, a plurality of notches are formed in the outer edge of the skirt edge, a mounting hole, a waist-shaped groove and a concave portion are formed in the top surface, and a step hole is formed in the center of the top surface