EBS solenoid valve core rolling riveting tooling and rolling riveting process

Abstract

The present invention discloses an EBS solenoid valve core rolling riveting tool and a rolling riveting process. The rolling riveting tool comprises: a fixed workbench, the fixed workbench is provided with a spindle and a workpiece chuck, the workpiece chuck rotates under the drive of the spindle, and one end of the iron core of the EBS solenoid valve core assembly to be processed is accommodated in the workpiece chuck and can rotate with the workpiece chuck; a movable workbench, the movable workbench is provided with a roller shaft, and the moving direction of the movable workbench is perpendicular to the axial direction of the roller shaft; a rolling riveting assembly, the rolling riveting assembly includes two rollers mounted on the roller shaft, a rolling riveting gap is formed between the two rollers, the two opposing surfaces of the rollers form a rolling riveting working surface, and the rolling riveting gap is on the same straight line as the center line of the workpiece chuck. The rolling riveting tool of the present invention greatly shortens the clamping time, has an extremely high processing speed, and the rolling riveting assembly has a tolerance for centering, which makes it easier to debug during production changes.

Description

Technical Field

[0001] The present invention relates to a production process of a solenoid valve assembly, and in particular to an EBS solenoid valve iron core rolling riveting tool and a rolling riveting process. Background Art

[0002] During the assembly process of the solenoid valve, the semi-finished core assembly needs to be assembled with the valve cover. In the prior art, the two are generally fastened together by riveting. Figure 1 、 2 As shown, a common process involves installing the valve cover into the semi-finished core assembly. This process is then press-fitted to the specified size using a hand press and a press-fitting fixture. The product is then placed in the fixture and tightened. The power is turned on to rotate the rivet head, and the rivet is pressed down to complete the process. This riveting method using a rivet machine requires the product to be mounted and tightened in a fixture. This is because, if the workpiece is not tightened, the moment the rivet head contacts the workpiece, friction causes the workpiece to swing due to instability. The combined force of this swinging motion and friction causes severe surface wear, so the workpiece must be tightened to overcome this drawback. Tightening the workpiece results in lengthy clamping times, and clamping the workpiece requires strict concentricity between the workpiece and the rivet head. This high-precision alignment of the upper and lower center positions results in lengthy production changeover and commissioning, complex commissioning procedures, and extended processing time. Summary of the Invention

[0003] In view of this, the present invention provides an EBS solenoid valve core rolling riveting tool and a rolling riveting process.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A rolling riveting tool for an EBS solenoid valve core assembly comprises: a fixed workbench, wherein the fixed workbench is provided with a main shaft and a workpiece chuck, wherein the workpiece chuck rotates driven by the main shaft, and one end of the iron core of the EBS solenoid valve core assembly to be processed is accommodated in the workpiece chuck and can rotate with the workpiece chuck; a movable workbench, wherein the movable workbench is provided with a roller shaft, and the movable workbench is provided with a guide rail or a guide groove so that the movable workbench can move linearly relative to the fixed workbench, and the moving direction of the movable workbench is perpendicular to the axial direction of the roller shaft; a rolling riveting assembly, wherein the rolling riveting assembly comprises two rollers mounted on the roller shaft, a rolling riveting gap is formed between the two rollers, and two opposite surfaces of the rollers form a rolling riveting working surface, and the rolling riveting gap is on the same straight line as the center line of the workpiece chuck.

[0006] Specifically, the roller shaft can swing relative to the movable workbench, and the swing angle is 3° to 6°.

[0007] Specifically, the rolling riveting working surface is a conical surface or a cylindrical surface.

[0008] Specifically, the mobile workbench is also provided with a swing limit pin, which is perpendicular to the roller shaft. A mounting shaft hole is opened on the mobile workbench, and the swing limit pin passes through the mobile workbench and the roller shaft. The roller shaft is supported in the mounting shaft hole, and the aperture of the mounting shaft hole is slightly larger than the diameter of the roller shaft.

[0009] Specifically, the power of the movable workbench can be manual or electric, the fixed workbench is equipped with a gear, and the movable workbench is provided with a rack meshing with the gear. The gear is driven to rotate by the power and then drives the rack to move.

[0010] Specifically, the movable workbench includes a movable workbench body and a mounting arm detachably mounted on the movable workbench body, and the mounting arm roller shaft and the limit pin are both mounted on the mounting arm.

[0011] Specifically, a plane bearing is installed on the outer sides of the two rollers on the roller shaft, and the rollers are installed on the roller shaft through rolling bearings.

[0012] Specifically, the fixed workbench is further provided with a mounting groove, and the workpiece chuck is rotatably arranged in the mounting groove.

[0013] The present invention also provides a rolling riveting process for an EBS solenoid valve core assembly, wherein the main shaft is driven to rotate by a power source, and the rolling riveting process comprises the following steps:

[0014] Step 1: Prepare a workpiece chuck that matches the iron core to be riveted, install the chuck on a fixed workbench and connect it to the spindle;

[0015] Step 2: The core assembly to be riveted is placed in the chuck, and the power source is activated without clamping, so that a clearance fit is formed between the core assembly and the workpiece chuck;

[0016] Step 3: Start the power source to rotate the main shaft. The main shaft rotates at a speed of 400 to 680 rpm. The core assembly rotates under the action of friction, and the speed of the core assembly does not match the speed of the main shaft.

[0017] Step 4: The movable workbench moves under the action of power, and the movable workbench drives the entire roller riveting assembly to move toward the iron core assembly;

[0018] Step 5: The feed force of the roller instantly pushes the core assembly to press the workpiece chuck. The rotation speed of the core matches that of the workpiece chuck. The roller rolls relative to the core assembly and moves instantly to complete the rolling riveting operation.

[0019] Specifically, the movement of the movable workbench includes a first feeding stage and a second feeding stage. The first feeding stage is before the roller contacts the iron core assembly, and the feeding speed at this time is 2000~5000mm / min; the second feeding stage is when the roller contacts and after the contact with the iron core, and the feeding speed at this time is 60~120mm / min.

[0020] The beneficial effects of this invention are: the roll riveting tooling described in this invention significantly shortens setup time, achieves extremely fast processing speeds, and the roll riveting assembly's tolerance to centering errors makes it easier to debug during production changes. Instrument lathes are more affordable than rotary riveting machines, saving equipment costs. Compared to the old process, the new process saves equipment costs, reduces setup time, shortens production changeover and debugging time, and reduces processing time, thereby improving overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Attachment Figure 1 The figure shows the assembly diagram of the solenoid valve core;

[0023] Attachment Figure 2 The figure shows a schematic diagram of the assembly process of the solenoid valve core in the prior art;

[0024] Attachment Figure 3 The figure shows the structure of the EBS solenoid valve core rolling riveting tooling of the present invention;

[0025] Attachment Figure 4 FIG2 is a schematic diagram showing the working process of the EBS solenoid valve core rolling riveting tool of the present invention;

[0026] Attachment Figure 5 FIG2 is a schematic diagram of the structure of the present invention, used to illustrate the relative rotation of the iron core and the roller;

[0027] Attachment Figure 6 Shown is a partial schematic diagram of the roll riveting tool of the present invention.

[0028] Reference numerals:

[0029] 1. Fixed workbench

[0030] 2. Mobile workbench

[0031] 3. Roll riveting components

[0032] 4. Spindle

[0033] 5. Workpiece chuck

[0034] 6. Roller shaft

[0035] 7. Scroll wheel

[0036] 8. Limit pin

[0037] 9. Gear

[0038] 10. Rack

[0039] 11. Plane bearings

[0040] 12. Rolling bearings

[0041] 13. Installation slot

[0042] 21. Workbench body

[0043] 22. Mounting arm DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] The present invention will be further described below with reference to the accompanying drawings.

[0046] The present invention provides the following technical solutions:

[0047] As attached Figures 1 to 6 As shown, the present invention discloses a rolling riveting tool for an EBS solenoid valve core assembly, comprising: a fixed workbench 1, a movable workbench 2, and a rolling riveting assembly 3. The fixed workbench 1 is provided with a spindle 4 and a workpiece chuck 5. The workpiece chuck 5 rotates under the drive of the spindle 4. One end of the core of the EBS solenoid valve core assembly to be processed is accommodated in the workpiece chuck 5 and can rotate with the workpiece chuck 5. The movable workbench 2 is provided with a roller shaft 6. The movable workbench 2 is also provided with a guide rail or a guide groove so that the movable workbench can move linearly relative to the fixed workbench. The moving direction of the movable workbench 2 is perpendicular to the axial direction of the roller shaft 6. The rolling riveting assembly 3 includes two rollers 7 mounted on the roller shaft 6. A rolling riveting gap is formed between the two rollers 7. The two opposing surfaces of the rollers 7 form a rolling riveting working surface. The rolling riveting gap is on the same straight line as the center line of the workpiece chuck 5. Specifically, the movable workbench 2 includes a movable workbench body 21 and a mounting arm 22 detachably mounted on the movable workbench body 21 , and the roller shaft 6 and the limiting pin 8 are both mounted on the mounting arm 22 .

[0048] Specifically, in this embodiment, the rolling riveting working surface is a conical surface. In actual use, the rolling riveting working surface matches the outer surface of the solenoid valve core to be riveted, and can be a cylindrical surface or other forms.

[0049] Specifically, the roller shaft 6 can swing relative to the movable worktable 2 at an angle of 3° to 6°. In this embodiment, the amplitude of the swing angle is 4°. This structural design is tolerant to centering errors, making it easier to debug during production changes.

[0050] In this embodiment, the swing of the roller shaft 6 relative to the movable workbench 2 is achieved in the following manner: a swing limit pin 8 is also provided on the movable workbench 2, and the swing limit pin 8 is perpendicular to the roller shaft 6. A mounting shaft hole is opened on the movable workbench 2, and the swing limit pin 8 passes through the movable workbench 2 and the roller shaft 6. The roller shaft 6 is supported in the mounting shaft hole, and the aperture of the mounting shaft hole is slightly larger than the diameter of the roller shaft 6.

[0051] Specifically, the power of the movable workbench 2 can be manual or electric. The fixed workbench 1 is equipped with a gear 9, and the movable workbench 2 is provided with a rack 10 meshing with the gear 9. The gear 9 is driven to rotate by the power and then drives the rack 10 to move.

[0052] Specifically, a plane bearing 11 is installed on the outer side of each of the two rollers 7 on the roller shaft 6 , and the rollers 7 are installed on the roller shaft 6 via rolling bearings 12 .

[0053] Specifically, the fixed workbench 1 is further provided with a mounting groove 13 , and the workpiece chuck 5 is rotatably disposed in the mounting groove 13 .

[0054] like Figures 4 and 5 As shown, the present invention also provides a rolling riveting process for an EBS solenoid valve core assembly, wherein the main shaft is driven to rotate by a power source, and the rolling riveting process comprises the following steps:

[0055] Step 1: Prepare a workpiece chuck that matches the iron core to be riveted, install the chuck on a fixed workbench and connect it to the spindle.

[0056] Step 2: The core assembly to be riveted is placed in the workpiece chuck, and the power source is started without clamping, so that a clearance fit is formed between the core assembly and the workpiece chuck; in this embodiment, the power source is a motor, and the rotation of the motor drives the spindle to rotate.

[0057] Step 3: Start the power source to rotate the spindle at 500 rpm. The core assembly rotates under the action of friction. At this time, the core assembly speed does not match the spindle speed. In other words, due to the clearance between the core assembly and the workpiece chuck, the speed of the core assembly and the workpiece chuck are not synchronized.

[0058] Step 4: In the present invention, the operator can shake the feed handle, which drives the gear to rotate, and the gear is linked to the rack. Since the rack is formed or mounted on the mobile workbench, the mobile workbench moves relative to the fixed workbench under the action of power, and the mobile workbench drives the entire roll riveting assembly toward the core assembly. At this time, the feed speed of the mobile workbench is F3600 (feeding 3600 mm per minute). In this embodiment, the mobile workbench is manually controlled. In actual implementation, the power for the mobile workbench can come from a motor or a cylinder. Of course, those skilled in the art will understand that when the power comes from a cylinder, the provision of the gear rack is not a necessary condition, and the mobile workbench can be directly connected to the cylinder.

[0059] Step 5: The roller contacts the core assembly. At the same time, the roller pushes the core assembly to press the workpiece chuck instantaneously under the action of the feed force. The feed speed at this time is F80 (80 mm per minute). The rotation speed of the core and the workpiece chuck match. The roller rolls relative to the core assembly and moves instantaneously to complete the rolling riveting operation.

[0060] Specifically, as described above in the roller riveting process of the present invention, the movement of the movable worktable includes a first feeding phase and a second feeding phase. The first feeding phase occurs before the roller contacts the core assembly, and the second feeding phase occurs after and after the roller contacts the core assembly. In actual implementation, the feed speed in the first feeding phase is preferably in the range of 2000-5000 mm / min; the feed speed in the second feeding phase is preferably in the range of 60-120 mm / min.

[0061] The principle of the roll riveting process of the present invention is described in detail below: The solenoid valve core to be riveted is loaded into the roll riveting fixture (in this embodiment, the roll riveting fixture is the workpiece chuck 5) on the instrument lathe. The power is turned on, and the solenoid valve core to be riveted rotates with the motor on the instrument lathe. The feed handle of the instrument lathe is then pulled, causing rollers to apply pressure to the end face of the solenoid valve core to be riveted. The friction generated by this pressure causes the two rollers in the roller device to roll in both directions. The two rollers can freely swing left and right to accommodate the effects of center deviation. While applying pressure and rolling, the two rollers are respectively shaped according to the outer contour of the final product, thus finally roll-riveting the product into shape.

[0062] When using the roll riveting tool described herein to roll rivet a workpiece, the workpiece does not need to be clamped. The solenoid valve core to be riveted rotates with the workpiece chuck. When the roller is not in contact with the solenoid valve core, the two rotate asynchronously, meaning their speeds do not match. When the roller presses the solenoid valve core, the solenoid valve core and the workpiece chuck rotate synchronously, and the friction between the roller and the solenoid valve core drives the roller to complete the roll riveting. The entire feeding process, from the time the roller contacts the solenoid valve core to the completion of the roll riveting, takes approximately 2 to 3 seconds. In existing riveting tooling, the solenoid valve core is in a non-rotating state during roll riveting. The instantaneous pressure and friction from the rollers causes the core to wobble, damaging its outer surface. In the present invention, the solenoid valve core rotates due to the friction of the workpiece chuck 5. Since there is no connection between the two, this rotation is relative. When the solenoid valve core is subjected to the friction of the rollers, it can instantly and adaptively adjust its rotation speed without damaging the core surface. This adaptive design allows the solenoid valve core to quickly complete the roll riveting operation without requiring tightening, without damaging the workpiece surface. This significantly shortens setup time and provides extremely fast processing speeds. The roll riveting assembly's tolerance to centering makes it easier to debug during production changes. Instrument lathes are more affordable than rotary riveting machines, saving equipment costs. Compared to the existing process, the new process offers advantages in terms of equipment cost savings, reduced setup time, reduced production changeover and debugging time, and reduced processing time, improving overall efficiency.

[0063] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rolling riveting tool for EBS solenoid valve core assembly, characterized in that: include: A fixed workbench, wherein a spindle and a workpiece chuck are provided on the fixed workbench, wherein the workpiece chuck rotates under the drive of the spindle, and one end of the iron core of the EBS solenoid valve iron core assembly to be processed is accommodated in the workpiece chuck and can rotate with the workpiece chuck; A movable workbench, wherein the movable workbench is provided with a roller shaft, and the movable workbench is provided with a guide rail or a guide groove so that the movable workbench can move linearly relative to the fixed workbench, and the moving direction of the movable workbench is perpendicular to the axial direction of the roller shaft; A rolling riveting assembly, the rolling riveting assembly comprising two rollers mounted on a roller shaft, a rolling riveting gap formed between the two rollers, two opposing surfaces of the rollers forming rolling riveting working surfaces, the rolling riveting gap being in a straight line with a center line of a workpiece chuck; The roller shaft can swing relative to the movable workbench, and the swing angle is 3° to 6°; The mobile workbench is also provided with a swing limit pin, which is perpendicular to the roller shaft. A mounting shaft hole is opened on the mobile workbench. The swing limit pin passes through the mobile workbench and the roller shaft. The roller shaft is supported in the mounting shaft hole. The aperture of the mounting shaft hole is slightly larger than the diameter of the roller shaft.

2. The roll riveting tool for the EBS solenoid valve core assembly according to claim 1, characterized in that: The rolling riveting working surface is a conical surface or a cylindrical surface.

3. The roll riveting tool for the EBS solenoid valve core assembly according to any one of claims 1 to 2, characterized in that: The power of the movable workbench is manual or electric, the fixed workbench is equipped with a gear, and the movable workbench is provided with a rack meshed with the gear. The gear is driven to rotate by the power and then drives the rack to move.

4. The roll riveting tool for the EBS solenoid valve core assembly according to claim 2, characterized in that: The movable workbench comprises a movable workbench body and a mounting arm which is detachably mounted on the movable workbench body, and the roller shaft and the swing limit pin are both mounted on the mounting arm.

5. The roll riveting tool for the EBS solenoid valve core assembly according to any one of claims 1 to 2, characterized in that: A plane bearing is respectively installed on the outer sides of the two rollers on the roller shaft, and the rollers are installed on the roller shaft through rolling bearings.

6. The roll riveting tool for the EBS solenoid valve core assembly according to any one of claims 1 to 2, characterized in that: The fixed workbench is further provided with a mounting groove, and the workpiece chuck is rotatably arranged in the mounting groove.

7. A rolling riveting process for an EBS solenoid valve core assembly, using the EBS solenoid valve core assembly rolling riveting tool according to any one of claims 1 to 6, characterized in that: The main shaft is driven by a power source to rotate, and the rolling riveting process includes the following steps: Step 1: Prepare a workpiece chuck that matches the iron core of the iron core assembly to be riveted, install the workpiece chuck on a fixed workbench and connect it to the spindle; Step 2: One end of the iron core of the iron core assembly to be riveted is placed in the workpiece chuck, and the power source is started without clamping, so that a clearance fit is formed between the iron core and the workpiece chuck; Step 3: Start the power source to rotate the main shaft. The iron core rotates under the action of friction, and the speed of the iron core does not match the speed of the main shaft. Step 4: The movable workbench moves under the action of power, and the movable workbench drives the entire roller riveting assembly to move toward the iron core assembly; Step 5: The feed force of the roller instantly pushes the core assembly to press the workpiece chuck. The rotation speed of the core matches that of the workpiece chuck. The roller rolls relative to the core assembly and moves instantly to complete the rolling riveting operation.

8. The rolling riveting process for the EBS solenoid valve core assembly according to claim 7, characterized in that: The movement of the movable workbench includes a first feeding stage and a second feeding stage. The first feeding stage is before the roller contacts the iron core assembly, and the feeding speed at this time is 2000~5000mm / min; the second feeding stage is when the roller contacts and after the contact with the iron core, and the feeding speed at this time is 60~120mm / min.

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