CN109079031B - In-mold riveting device and method for silicon steel sheet progressive die - Google Patents
In-mold riveting device and method for silicon steel sheet progressive die Download PDFInfo
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- CN109079031B CN109079031B CN201811057140.7A CN201811057140A CN109079031B CN 109079031 B CN109079031 B CN 109079031B CN 201811057140 A CN201811057140 A CN 201811057140A CN 109079031 B CN109079031 B CN 109079031B
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- silicon steel
- steel sheet
- jacking
- cylinder
- progressive die
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 106
- 230000000750 progressive effect Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 238000004080 punching Methods 0.000 claims description 37
- 238000003825 pressing Methods 0.000 claims description 34
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
Abstract
The invention relates to the technical field of stamping dies and discloses an in-die riveting device and a riveting method for a silicon steel sheet progressive die, wherein the in-die riveting device comprises a tightening seat which is arranged on the progressive die and is used for stacking silicon steel sheets, a tightening ring is arranged on the tightening seat, a jacking cylinder which is used for jacking in the up-down direction is arranged under the tightening ring, the top end of a lifting rod of the jacking cylinder is connected with a jacking disc, and a transverse push rod which is used for transversely pushing a jacking silicon steel sheet assembly from the jacking disc of the jacking cylinder to a feed box is arranged on one side under the tightening ring; the riveting method comprises the process steps of setting an origin position and a discharging position, counting punched sheets by a punch control system, and enabling a jacking cylinder and a transverse push rod to act successively so as to realize jacking and discharging. The invention improves the stacking quality of the silicon steel sheets.
Description
Technical Field
The invention relates to the technical field of stamping dies, in particular to an in-die riveting device and a riveting method for a silicon steel sheet progressive die.
Background
Silicon steel sheets are the main components for motor stator and rotor or transformer, and it is usually necessary to stack multiple silicon steel sheets into one body for use. The silicon steel sheet is usually punched on a punch press by using a progressive die. In order to realize the lamination, a riveting hole is punched on the silicon steel sheet.
In the prior art, a progressive die for stamping silicon steel sheets is provided with a tightening seat for stacking, a tightening ring for accommodating the silicon steel sheets is arranged in the tightening seat, and the tightening ring and the silicon steel sheets are in interference fit to form larger friction force. The principle of stacking silicon steel sheets is that the stamping force and the accurate stamping step distance of a blanking punch on a die are utilized, each time a piece of silicon steel sheet is stamped, the blanking punch presses the silicon steel sheet into a tightening ring, and adjacent silicon steel sheets are connected together through riveting. In order to prevent the mutual adhesion of two adjacent groups of silicon steel sheets, a silicon steel sheet without punching a riveting hole is arranged between the two adjacent groups of silicon steel sheets.
The silicon steel sheets stacked by adopting the prior art have the following problems: burrs are generated during punching of the silicon steel sheets, a certain micro-gap is easy to occur between two adjacent silicon steel sheets of the stacked silicon steel sheet assembly, the silicon steel sheet assembly is not tight, and finally the performance of a motor stator and a motor rotor or a transformer is reduced. On the other hand, due to the abrasion of the tightening ring on the progressive die, the riveting force of the silicon steel sheets is reduced, and the stacked silicon steel sheet assembly is also easy to be loose.
Disclosure of Invention
In order to solve the problems, the invention provides an in-mold riveting device for a silicon steel sheet progressive die, which aims to improve the stacking quality of the silicon steel sheets, and the specific technical scheme is as follows:
the in-mold riveting device for the silicon steel sheet progressive die comprises a tightening seat arranged on the progressive die and used for carrying out silicon steel sheet stacking, a tightening ring is arranged on the tightening seat, a jacking cylinder used for jacking in the up-down direction is arranged right below the tightening ring, a jacking disc is connected to the top end of a lifting rod of the jacking cylinder, and a transverse push rod used for transversely pushing a jacked silicon steel sheet assembly to a feed box from the jacking disc of the jacking cylinder is arranged on one side below the tightening ring.
According to the technical scheme, the jacking cylinder is used for jacking the silicon steel sheet assembly, so that adjacent silicon steel sheets of the stacked silicon steel sheet assembly are closer, and the stacking quality of the silicon steel sheets is improved.
In the invention, the jacking cylinder and the transverse push rod are connected with a control system of the punch press through the electromagnetic valve for controlling the actions of the jacking cylinder and the transverse push rod.
In order to realize the accurate control of the height position of the top pressure plate on the top pressure cylinder, a laser ranging sensor for detecting the height position of the top pressure plate on the top pressure cylinder is arranged below the top pressure plate, and the laser ranging sensor is connected with a control system of the punch press.
As a preferable mode of the invention, the safety limit position of the lifting of the upper end face of the top pressure plate of the top pressure cylinder is set at a position 5-10 sheets below the tightening ring.
The safety limit position of the pressing disc of the pressing cylinder is set, so that the safety of the riveting device is improved.
As a further improvement of the invention, an overload buffer cushion is arranged between the top pressure plate and the lifting rod of the top pressure cylinder, and the back end of the top pressure plate is connected with a pre-tightening pressure plate.
The overload buffer cushion is arranged between the top pressure plate and the lifting rod, so that overload during top pressure can be prevented, and accumulated thickness errors of silicon steel sheets can be compensated during top pressure, so that the situation that the top pressure plate is not in place during top pressure is avoided.
As a preferred embodiment of the overload buffer, the overload buffer is a belleville spring.
As a further improvement of the invention, an adjusting gasket for adjusting the pretightening force is arranged between the pretightening pressure plate and the top pressure plate.
Preferably, the jacking force of the jacking cylinder is set according to the area of a single silicon steel sheet, and the value of the jacking force is 15-30 kg/cm 2 。
The pretightening force is adjusted by the arrangement of the adjusting gaskets between the pretightening pressure plate and the top pressure plate, and pretightening forces with different sizes are obtained by replacing the adjusting gaskets with different thicknesses, so that the pretightening force requirements of different products can be met.
A riveting method for an in-mold riveting device of a silicon steel sheet progressive die comprises the following process steps:
step 1, setting the ascending safety limit position of the upper end face of a top pressing plate of a top pressing cylinder at a position which is away from the thickness of N punching sheets below a tightening ring, wherein N=5-10, setting the limit position as an original point position, and setting the discharging position of the lower end of a stacked silicon steel sheet assembly at a position of the thickness of N punching sheets below the tightening ring plus the total height of a group of silicon steel sheet assemblies;
step 2, lifting the jacking cylinder to the original position, starting punching by a punching machine, and counting punched sheets by a punching machine control system;
step 3, after the punching of the first group of silicon steel sheet components is completed, the punch control system clears the count, and the count is restarted;
step 4, continuously stamping the next group of silicon steel sheet components, and simultaneously moving a jacking cylinder downwards to a position with the thickness of one stamping piece for each stamping piece until the stamping of the next group of silicon steel sheet components is completed and the jacking cylinder moves to a discharging position; wherein, every time a group of silicon steel sheet components are punched, the punch control system clears the count and the count is restarted;
step 5, a transverse push rod acts, a silicon steel sheet assembly on a top pressure plate of a top pressure cylinder is transversely pushed to a feed box, and then the transverse push rod returns to the original position;
step 6, the jacking cylinder is quickly lifted until the upper end face position of the jacking disc reaches the thickness of N punching sheets below the tightening ring and the total number of the punching sheets continuously punched by the punching machine during the action of the jacking cylinder from descending to lifting;
and 7, repeating the steps 4-6 until the punching machine finishes all punching tasks and then stopping.
In the riveting method, the punching of the silicon steel sheet, the counting of the punching sheets, the jacking and discharging actions of the jacking cylinder and the transverse push rod are realized through the punch control system, so that on one hand, higher punching stacking automation is realized, and on the other hand, the stacked silicon steel sheet assembly is tighter due to the fact that the jacking force is applied to the silicon steel sheet assembly, and therefore the quality of the silicon steel sheet assembly is improved.
The beneficial effects of the invention are as follows:
firstly, according to the in-mold riveting device for the silicon steel sheet progressive die, the jacking of the silicon steel sheet component is realized through the jacking cylinder, so that adjacent silicon steel sheets of the stacked silicon steel sheet component are more compact, and the stacking quality of the silicon steel sheets is improved.
Secondly, according to the in-mold riveting device for the silicon steel sheet progressive die, the safety of the riveting device is improved due to the fact that the safety limit position of the top pressing disc of the top pressing cylinder is set.
Thirdly, according to the in-mold riveting device for the silicon steel sheet progressive die, the overload buffer cushion is arranged between the top pressing disc and the lifting rod, so that on one hand, overload during top pressing can be prevented, on the other hand, the thickness accumulated error of the silicon steel sheet can be compensated during top pressing, and the situation that the top pressing of the top pressing disc is not in place is avoided.
Fourth, according to the in-mold riveting device for the silicon steel sheet progressive die, the pretightening force is adjusted by arranging the adjusting gaskets between the pretightening pressing plate and the top pressing plate, and pretightening forces with different sizes are obtained by changing the adjusting gaskets with different thicknesses, so that the device can meet the demands of pretightening forces of different products.
Fifth, the in-mold riveting device for the silicon steel sheet progressive die realizes stamping and sheet counting of the silicon steel sheets, and jacking and discharging actions of a jacking cylinder and a transverse push rod through a punch control system, so that higher stamping and stacking automation is realized on one hand, and on the other hand, the stacked silicon steel sheet assembly is tighter due to the fact that jacking force is applied to the silicon steel sheet assembly, and accordingly quality of the silicon steel sheet assembly is improved.
Drawings
FIG. 1 is a schematic structural view of an in-mold riveting device for a progressive die of a silicon steel sheet.
In the figure: 1. tightening seat 2, tightening ring 3, pressing cylinder 4, pressing disk 5, silicon steel sheet component 6, feed box 7, transverse push rod 8, electromagnetic valve 9, laser distance measuring sensor, 10, a control system 11, an overload buffer pad 12, a pre-tightening pressing plate 13, an adjusting gasket 14, a hydraulic station 15, a progressive die (female die) 16 and a blanking punch;
in the figure: a is the original point position, and B is the discharging position.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1:
as shown in fig. 1, an embodiment of an in-mold riveting device for a silicon steel sheet progressive die of the invention comprises a tightening seat 1 arranged on a progressive die 15 and used for stacking silicon steel sheets, a tightening ring 2 is arranged on the tightening seat 1, a jacking cylinder 3 used for jacking in the vertical direction is arranged under the tightening ring 2, the top end of a lifting rod of the jacking cylinder 3 is connected with a jacking disc 4, and a transverse push rod 7 used for transversely pushing a jacking silicon steel sheet assembly 5 from the jacking disc 4 of the jacking cylinder 3 to a feed box 6 is arranged on one side under the tightening ring 2.
In the technical scheme, the jacking cylinder 3 is used for jacking the silicon steel sheet assembly 5, so that the adjacent silicon steel sheets of the stacked silicon steel sheet assembly 5 are more compact, and the stacking quality of the silicon steel sheets is improved.
In this embodiment, the pressing cylinder 3 and the transverse push rod 7 are connected to a control system 10 of the punch press through an electromagnetic valve 8 for controlling the actions of the pressing cylinder 3 and the transverse push rod 7.
In order to realize accurate control of the height position of the top pressing plate 4 on the top pressing cylinder 3, a laser ranging sensor 9 for detecting the height position of the top pressing plate 4 on the top pressing cylinder 3 is arranged below the top pressing plate 4, and the laser ranging sensor 9 is connected with a control system 10 of the punching machine.
As a preferable mode of this embodiment, the safety limit position of the upper end face of the top pressure plate 4 of the top pressure cylinder 3, which is raised, is set at a position 5 to 10 pieces of punched pieces below the tightening ring 2.
The safety of the riveting device is improved by the arrangement of the safety limit position of the top pressing plate 4 of the top pressing cylinder 3.
As a further improvement of the embodiment, an overload buffer 11 is arranged between the top pressure plate 4 and the lifting rod of the top pressure cylinder 3, and the back end of the top pressure plate 4 is connected with a pre-tightening pressure plate 12.
The overload buffer cushion 11 is arranged between the top pressure plate 4 and the lifting rod, so that overload during top pressure can be prevented, and accumulated errors of thickness of silicon steel sheets can be compensated during top pressure, and the situation that the top pressure plate 4 is not in place during top pressure is avoided.
As a preferred embodiment of the overload buffer 11, the overload buffer 11 is a belleville spring.
As a further improvement of the present embodiment, an adjusting washer 13 for adjusting the pre-tightening force is disposed between the pre-tightening pressure plate 12 and the top pressure plate 4.
Preferably, the jacking force of the jacking cylinder 3 is set according to the area of a single silicon steel sheet, and the value of the jacking force is 15-30 kg/cm 2 。
The pretightening force is adjusted by the arrangement of the adjusting gaskets 13 between the pretightening pressure plate 12 and the top pressure plate 4, and pretightening forces with different sizes are obtained by changing the adjusting gaskets 13 with different thicknesses, so that the pretightening force requirements of different products can be met.
Example 2:
a riveting method for an in-mold riveting device of a silicon steel sheet progressive die comprises the following process steps:
step 1, setting the ascending safety limit position of the upper end surface of a top pressing plate 4 of a top pressing cylinder 3 at a position which is away from the thickness of N punching sheets below a tightening ring 2, wherein N=5-10, setting the limit position as an origin position A, and setting the discharging position of the lower end of a stacked silicon steel sheet assembly 5 at a position of the thickness of N punching sheets below the tightening ring 2 plus the total height of a group of silicon steel sheet assemblies 5;
step 2, lifting the jacking cylinder 3 to an original position A, starting punching by a punch, and counting punched sheets by a punch control system 10;
step 3, after the punching of the first group of silicon steel sheet assemblies 5 is completed, the punch control system 10 clears the count, and the count is restarted;
step 4, continuously stamping the next group of silicon steel sheet assemblies 5, and simultaneously moving a jacking cylinder 3 downwards for one stamping sheet thickness position every stamping until the next group of silicon steel sheet assemblies 5 are stamped, and moving the jacking cylinder 3 to a discharging position B; wherein, every time a group of silicon steel sheet components 5 are punched, the punch control system 10 clears the count, and the count is restarted;
step 5, a transverse push rod 7 acts, a silicon steel sheet assembly 5 on a top pressure plate 4 of the top pressure cylinder 3 is transversely pushed to a feed box 6, and then the transverse push rod 7 returns to the original position;
step 6, the jacking cylinder 3 is quickly lifted until the upper end surface position of the jacking disc 4 reaches the thickness of N punched sheets below the tightening ring 2, and the total number of punched sheets is continuously punched by the punching machine during the action of the jacking cylinder 3 from descending to lifting;
and 7, repeating the steps 4-6 until the punching machine finishes all punching tasks and then stopping.
In the riveting method, the punching of the silicon steel sheets, the counting of the punched sheets, the jacking and unloading actions of the jacking cylinder 3 and the transverse push rod 7 are realized through the punch control system 10, so that on one hand, higher punching stacking automation is realized, and on the other hand, the stacked silicon steel sheet assembly 5 is tighter due to the fact that the jacking force is applied to the silicon steel sheet assembly 5, and therefore the quality of the silicon steel sheet assembly 5 is improved.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (8)
1. The in-mold riveting device for the silicon steel sheet progressive die is characterized by comprising a tightening seat which is arranged on the progressive die and used for stacking the silicon steel sheets, a tightening ring is arranged on the tightening seat, a jacking cylinder which is used for jacking in the up-down direction is arranged under the tightening ring, the top end of a lifting rod of the jacking cylinder is connected with a jacking assembly which consists of a jacking plate, an overload buffer pad, an adjusting gasket and a pre-tightening pressure plate, the top end of the lifting rod of the jacking cylinder is provided with a supporting plate for supporting the overload buffer pad, the back end of the jacking plate is upwards provided with a buffer pad installation space for installing the overload buffer pad, the overload buffer pad is arranged in the buffer pad installation space of the jacking plate, the pre-tightening plate is fixed at the back end of the jacking plate, and the part, which is close to the lifting rod, of the pre-tightening pressure plate is abutted against the back end of the supporting plate; one side below the tightening ring is provided with a transverse push rod for transversely pushing the pressed silicon steel sheet assembly from the top pressing disc to the feed box.
2. The in-mold riveting device for the silicon steel sheet progressive die according to claim 1, wherein the top pressure cylinder and the transverse push rod are connected with a control system of a punch press through electromagnetic valves for controlling the actions of the top pressure cylinder and the transverse push rod.
3. The in-mold riveting device for the silicon steel sheet progressive die according to claim 2, further comprising a laser ranging sensor which is externally arranged on the jacking component and is positioned below the jacking plate and used for detecting the height position of the jacking plate on the jacking cylinder; the laser ranging sensor is connected with a control system of the punch.
4. The in-mold riveting device for the silicon steel sheet progressive die according to claim 2, wherein the lifting safety limit position of the upper end face of the top pressing plate of the top pressing cylinder is arranged at a position 5-10 sheets below the tightening ring.
5. The in-mold riveting apparatus for silicon steel sheet progressive die as claimed in claim 1, wherein the overload buffer is a pair of belleville springs connected back to back each other in an up-down direction.
6. The in-mold riveting device for the silicon steel sheet progressive die according to claim 1, wherein an adjusting gasket for adjusting the pretightening force is arranged between the pretightening pressing plate and the top pressing plate.
7. The in-mold riveting device for the progressive die of the silicon steel sheet as claimed in claim 1, wherein the jacking force of the jacking cylinder is set according to the size of the area of the single silicon steel sheet and is 15-30 kg/cm 2 。
8. Riveting method of the in-mold riveting device for a silicon steel sheet progressive die as claimed in any one of claims 1 to 7, characterized by comprising the following process steps:
step 1, setting the ascending safety limit position of the upper end face of a top pressing plate of a top pressing cylinder at a position which is away from the thickness of N punching sheets below a tightening ring, wherein N=5-10, setting the limit position as an original point position, and setting the discharging position of the lower end of a stacked silicon steel sheet assembly at a position of the thickness of N punching sheets below the tightening ring plus the total height of a group of silicon steel sheet assemblies;
step 2, lifting the jacking cylinder to the original position, starting punching by a punching machine, and counting punched sheets by a punching machine control system;
step 3, after the punching of the first group of silicon steel sheet components is completed, the punch control system clears the count, and the count is restarted;
step 4, continuously stamping the next group of silicon steel sheet components, and simultaneously moving a jacking cylinder downwards to a position with the thickness of one stamping piece for each stamping piece until the stamping of the next group of silicon steel sheet components is completed and the jacking cylinder moves to a discharging position; wherein, every time a group of silicon steel sheet components are punched, the punch control system clears the count and the count is restarted;
step 5, a transverse push rod acts, a silicon steel sheet assembly on a top pressure plate of a top pressure cylinder is transversely pushed to a feed box, and then the transverse push rod returns to the original position;
step 6, the jacking cylinder is quickly lifted until the upper end face position of the jacking disc reaches the thickness of N punching sheets below the tightening ring and the total number of the punching sheets continuously punched by the punching machine during the action of the jacking cylinder from descending to lifting;
and 7, repeating the steps 4-6 until the punching machine finishes all punching tasks and then stopping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057140.7A CN109079031B (en) | 2018-09-11 | 2018-09-11 | In-mold riveting device and method for silicon steel sheet progressive die |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811057140.7A CN109079031B (en) | 2018-09-11 | 2018-09-11 | In-mold riveting device and method for silicon steel sheet progressive die |
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| CN109079031A CN109079031A (en) | 2018-12-25 |
| CN109079031B true CN109079031B (en) | 2024-04-02 |
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| CN112719100B (en) * | 2020-12-28 | 2023-07-04 | 江阴华新精密科技股份有限公司 | Rotary iron core lamination press-fitting die and press-fitting method |
| CN114785060B (en) * | 2022-03-09 | 2023-04-18 | 江阴华新精密科技股份有限公司 | Motor stator and rotor iron core stamping progressive die adopting dispensing lamination and dispensing process |
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