CN112475188A - Limiting device for two ends of VGR rack swing-rolled blank and application thereof - Google Patents
Limiting device for two ends of VGR rack swing-rolled blank and application thereof Download PDFInfo
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- CN112475188A CN112475188A CN202011347999.9A CN202011347999A CN112475188A CN 112475188 A CN112475188 A CN 112475188A CN 202011347999 A CN202011347999 A CN 202011347999A CN 112475188 A CN112475188 A CN 112475188A
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- blank
- concave
- movable cushion
- prefabricated blank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/767—Toothed racks
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Abstract
The invention discloses a limiting device for two ends of a VGR rack swing-rolled blank and application thereof, wherein the device comprises: prefabricated blank both ends are equipped with the concave and convex face of tip respectively, the concave and convex face of movable cushion piece that is equipped with on the movable cushion piece, and the concave and convex face of movable cushion piece that is equipped with on two movable cushion pieces restricts respectively rather than the concave and convex face of complex tip and rotates, and movable cushion piece and prefabricated blank offset or the separation realizes the fixed or separation to prefabricated blank, and the device's application method step includes: the device prevents a product from swinging along with a die in the forming process of the VGR rack by fixing the device in the radial direction and the axial direction, and can improve the tooth profile precision, the stability and the production efficiency of the product on the premise of fully using materials and ensuring the mechanical property of the product by using the method.
Description
Technical Field
The invention relates to the technical field of automobile accessory production, in particular to a VGR rack rotary forging blank positioning device and application thereof.
Background
The automobile steering system is a mechanism for changing or maintaining the running direction of an automobile, and ensures that the automobile can be steered and run according to the intention of a driver. Steering gear assemblies are an important component of automotive steering systems, and common steering gears include rack and pinion, worm crank pin, and recirculating ball. The rack and pinion steering gear is simple and compact in structure and high in transmission efficiency, and is used in automobiles more. The steering gear has high use frequency and complex working condition in the automobile running process, and is easy to generate abnormal sound. The abnormal sound generated in the process of meshing the steering gear and the steering rack is particularly obvious, and when the vibration frequency of the steering gear meshed with the steering rack is close to or equal to the self frequency of the steering gear assembly, the resonance is generated, and the abnormal sound is generated. The comfort of the user is influenced, and the quality of the whole vehicle is reduced.
The traditional rack of the automobile steering machine has constant transmission ratio, and the tooth-to-tooth distances are called CGR racks, and the traditional rack is generally manufactured by cutting machining methods such as tooth broaching or tooth milling. With the development of automobile technology, a variable transmission ratio steering engine is widely used abroad and is gradually applied domestically, and the pitch of a rack of the variable transmission ratio steering engine changes according to a transmission ratio curve, and the variable transmission ratio steering engine is called a VGR rack. At present, a variable pitch rack completely depends on import, in the domestic VGR rack process, blanks cannot be positioned in the process of pendulum rolling, so that the technical development of the pendulum rolling process is slow, and domestic racks of the existing steering engine are all CGR products and cannot meet the requirement of the variable transmission ratio of the steering engine.
In the process of developing a VGR rack rotary forging process, if a proper positioning structure of a blank and a die is not provided, the blank can swing along with a movable die, so that the problems that a tooth part cannot be smoothly filled, the tooth top is distorted, the tooth profile precision is low and the like are caused, and a qualified VGR rack product is difficult to obtain.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the defects of the prior art, the invention provides a blank positioning device for a VGR rack swing rolling process and application thereof.
The technical scheme is as follows: in order to achieve the above object, the invention provides a device for limiting two ends of a blank to be rolled by a VGR rack, comprising: the device comprises an upper die, a lower die, a prefabricated blank, a lower template, a lower die ejector rod, a lower sliding block, lower die ejector rod cushion blocks, a movable cushion block and a movable cushion block, wherein the lower die is positioned below the upper die, the prefabricated blank is positioned between the upper die and the lower die, the lower template is arranged below the lower die, the lower die ejector rod cushion blocks penetrate through the lower die and the lower template, the lower sliding block is positioned below the lower template, the lower die ejector rod cushion blocks are arranged below the lower die ejector rod and abut against a machine table ejector rod penetrating through the lower sliding block, end concave-convex surfaces are respectively arranged at two ends of the prefabricated blank, the concave-convex surfaces of the movable cushion blocks;
the movable cushion block is fastened with the transmission rod, the transmission rod is connected with a hydraulic control system, a pneumatic control system or a mechanical transmission system which provides power in a control mode, when the prefabricated blank needs to be axially fixed, the PLC circuit controls the transmission rod to push the movable cushion block, one end face of the prefabricated blank is close to the inner side of the movable cushion block, the PLC circuit controls the other transmission rod to continuously extend out, the movable cushion block connected with the transmission rod is enabled to abut against the other end face of the prefabricated blank, and axial positioning of the prefabricated blank is achieved. When the rotary forging process is finished and a product needs to be taken out, the PLC circuit sends a signal to control a transmission rod connected with a hydraulic control system, a pneumatic control system or a mechanical transmission system to reset, so that the movable cushion block is separated from the end part of the prefabricated blank, and the product can be ejected out through the ejector rod;
as a further preferred aspect of the present invention, the concave-convex surface of the end portion and the concave-convex surface of the movable cushion block are respectively provided with one or more grooves or protrusions of triangle, square, fan, revolution surface or combination thereof.
As a further preferred aspect of the present invention, the included angle of the triangular or fan-shaped grooves or protrusions is 40 ° to 70 °.
As a further optimization of the invention, the area of the concave-convex surface at the concave end part and the concave-convex surface of the movable cushion block accounts for 40-60% of the area of the end surface of the prefabricated blank, the connection of the prefabricated blank placed into the lower die is more stable and reliable by the proportion, the blank is ensured not to swing along with the die when the blank is subjected to pendulum rolling of the VGR tooth form, and the radial limit of the prefabricated blank is realized.
Preferably, the movable cushion blocks are provided with movable cushion block concave-convex surfaces respectively matched with the shapes of the end concave-convex surfaces matched with the movable cushion block concave-convex surfaces.
An application method of limiting devices at two ends of a VGR rack swing-rolled blank is characterized by comprising the following specific steps:
step one, prefabricating a blank
Obtaining a prefabricated blank by forging extrusion or milling;
step two, sand blasting
Performing sand blasting on the prefabricated blank, and then performing sand blasting on the prefabricated blank by using a sand blasting machine to remove oxide skin and attachments on the surface of the bar;
step three, involucra treatment
Performing leather membrane treatment on the prefabricated blank subjected to sand blasting treatment;
step four, rotary forging forming
The prefabricated blank after the skin membrane treatment is placed into a die cavity of a lower die, a PLC circuit controls movable cushion block concave-convex surfaces on movable cushion blocks connected with a transmission rod to be clamped into end concave-convex surfaces of the prefabricated blank and pushes the prefabricated blank to a limited position, and after the other transmission rod connected with a hydraulic control system receives a signal sent by the PLC circuit, movable cushion block concave-convex surfaces on the movable cushion blocks connected with the transmission rod are clamped into the other end concave-convex surfaces on the prefabricated blank to realize radial positioning of the prefabricated blank;
the lower sliding block drives the lower die to move and then the upper die starts to swing until the upper die contacts the prefabricated blank, and the upper die is provided with a tooth form corresponding to the tooth form of the VGR;
when the upward moving stroke of the lower sliding block reaches the height of a set value, the rotary forging forming is stopped, and the surface of the prefabricated blank is subjected to rotary forging to form the needed VGR tooth form, namely a finished product;
step five, taking out
After a finished product is obtained, the PLC sends a signal to the hydraulic control system to control the two transmission rods to respectively drive the movable cushion blocks to reset, the movable cushion blocks are separated from the finished product, the lower slide block drives the lower die to move downwards, and the machine table ejector rod drives the lower die ejector rod cushion blocks and the lower die ejector rod to move towards the upper die direction to eject the finished product.
In a further preferred embodiment of the present invention, the coating treatment in step three is a treatment step of immersing the preform subjected to the sand blasting treatment in a phosphating solution for 30 to 60 minutes to deposit a water-insoluble crystalline phosphate conversion coating on the surface of the preform.
As a further preferred mode of the invention, the hydraulic control system, the pneumatic control system or the mechanical transmission system, the upper die and the lower slide block are respectively connected with the PLC circuit.
Has the advantages that: according to the blank positioning device in the VGR rack rotary forging process and the application thereof, the device prevents a product from swinging along with a die through radial and axial fixation in the forming process of the VGR rack, and the tooth form precision, the stability and the production efficiency of the product can be improved on the premise of fully using materials and ensuring the mechanical property of the product by using the fixation method.
Drawings
FIG. 1 is a schematic view of a preform;
FIG. 2 is a left side view of the end relief;
FIG. 3 is a right side view of the fixed block;
FIG. 4 is a front elevational view, in full section, of the fixed spacer;
FIG. 5 is a partial cross-sectional view of the lower die;
FIG. 6 is a partially enlarged view of the mating of the concave and convex surfaces;
FIG. 7 is a front view of the working state before rotary forging;
fig. 8 is a left side view of the working state after the rotary milling.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
As shown in the attached drawings, the invention discloses a limiting device for two ends of a VGR rack swing-rolled blank, which comprises: the device comprises a prefabricated blank 1, a concave-convex surface 11 at the end part, an upper die 10, a lower die 20, a lower die plate 30, a lower die ejector rod 40, a lower die ejector rod cushion block 50, a movable cushion block 70, a concave-convex surface 701 of the movable cushion block, a lower slide block 80 and a machine bench ejector rod 90.
The prefabricated blank 1 is located in the middle of the upper die 10 and the lower die 20, the lower die plate 30 is installed below the lower die 20, the lower die ejector rod 40 penetrates through the lower die 20 and the lower die plate 30, the lower sliding block 80 is located below the lower die plate 30, the lower die ejector rod cushion block 50 is installed below the lower die ejector rod 40 and abuts against a machine table ejector rod 90 penetrating through the lower sliding block 80, end concave-convex surfaces 11 are respectively arranged at two ends of the prefabricated blank 1, movable cushion block concave-convex surfaces 701 arranged on the two movable cushion blocks 70 respectively limit rotation of the end concave-convex surfaces 11 matched with the movable cushion blocks, the movable cushion blocks 70 are fastened with the transmission rod, and the transmission rod is connected with a hydraulic control system, a pneumatic control system or a mechanical transmission system for providing power in a controlled.
Example 1
Step one, prefabricating a blank
Obtaining a prefabricated blank 1 by forging extrusion or milling;
step two, sand blasting
After performing sand blasting on the prefabricated blank 1, performing sand blasting on the prefabricated blank 1 by using a sand blasting machine to remove oxide skin and attachments on the surface of the bar;
step three, involucra treatment
Performing a film treatment on the prefabricated blank 1 after the sand blasting treatment, wherein the film treatment is a treatment process of immersing the prefabricated blank 1 after the sand blasting treatment into phosphating solution for 30min and depositing a layer of water-insoluble crystalline phosphate conversion film on the surface of the prefabricated blank 1;
step four, rotary forging forming
Placing the precast blank 1 after the skin treatment into a die cavity of a lower die 20, controlling a transmission rod connected with a hydraulic control system to work by a PLC circuit, pushing a movable cushion block 70 by the transmission rod, enabling the movable cushion block concave-convex surface 701 on the movable cushion block 70 to be clamped into the end concave-convex surface 11 of the precast blank 1 and pushing the precast blank 1 to a limited position, then clamping the movable cushion block concave-convex surface 701 on the movable cushion block 70 connected with the transmission rod into the other end concave-convex surface 11 on the precast blank 1 by the other transmission rod connected with the hydraulic control system after the hydraulic control system receives a signal sent by the PLC circuit, realizing the radial positioning of the precast blank 1, realizing the axial positioning of the precast blank 1 by the movable cushion block 70 by abutting against two ends of the precast blank 1 by the two movable cushion blocks 70, wherein a triangular groove is arranged on the end concave-convex surface 11, and a triangular convex block is respectively arranged on the concave-convex surface, the triangular grooves and the triangular lugs are opposite in position, the area of the triangular grooves and the triangular lugs accounts for 40% of the area of the end face of the prefabricated blank 1, and the included angle between the triangular grooves and the triangular lugs is 40 degrees;
at this time, after the to-be-transmitted rod moves to the limited position, the PLC circuit sends a signal to the lower sliding block 30, after the lower sliding block 30 drives the lower die 20 to move upwards, the upper die 10 starts to swing after receiving the signal sent by the PLC circuit until the upper die 10 contacts the prefabricated blank 1, and the upper die 10 starts to swing and roll to form, and is provided with a tooth form corresponding to the tooth form of VGR;
after the upward travel of the lower sliding block 30 reaches the height of a set value, the rotary forging forming is stopped, and the surface of the prefabricated blank 1 is subjected to rotary forging to form a needed VGR tooth form, namely a finished product 2;
step five, taking out
After the finished product 2 is obtained, the PLC circuit sends a signal to the hydraulic control system to control the two transmission rods to respectively drive the movable cushion block 70 to reset, the movable cushion block 70 is separated from the finished product, the lower slide block 30 drives the lower die 20 to move downwards, and the machine bench ejector rod 90 drives the lower die ejector rod cushion block 50 and the lower die ejector rod 40 to move towards the upper die 10 to eject the finished product 2.
Example 2
Step one, prefabricating a blank
Obtaining a prefabricated blank 1 by forging extrusion or milling;
step two, sand blasting
After performing sand blasting on the prefabricated blank 1, performing sand blasting on the prefabricated blank 1 by using a sand blasting machine to remove oxide skin and attachments on the surface of the bar;
step three, involucra treatment
Performing a film treatment on the prefabricated blank 1 after the sand blasting treatment, wherein the film treatment is a treatment process of immersing the prefabricated blank 1 after the sand blasting treatment into phosphating solution for 60min and depositing a layer of water-insoluble crystalline phosphate conversion film on the surface of the prefabricated blank 1;
step four, rotary forging forming
The precast blank 1 after the skin membrane treatment is placed in a die cavity of a lower die 20, a PLC circuit controls a transmission rod connected with a pneumatic control system to work, the transmission rod pushes a movable cushion block 70, so that the movable cushion block concave-convex surface 701 of the movable cushion block 70 is clamped into the end concave-convex surface 11 on the precast blank 1 and pushes the precast blank to a limited position, another transmission rod connected with the pneumatic control system is clamped into the other end concave-convex surface 11 on the precast blank 1 after the pneumatic control system receives a signal sent by the PLC circuit, the movable cushion block concave-convex surface 701 on the movable cushion block 70 connected with the transmission rod is clamped into the other end concave-convex surface 11 on the precast blank 1, the radial positioning of the precast blank 1 is realized, the axial positioning of the precast blank 1 by the movable cushion block 70 is realized through the two movable cushion blocks 70 abutting against two ends of the precast blank 1, the end concave-convex surface 1 is provided with two fan-shaped convex, the two fan-shaped convex blocks are opposite to the two fan-shaped grooves, the area of the fan-shaped grooves and the area of the fan-shaped convex blocks account for 60% of the area of the end face of the prefabricated blank 1, and the included angle between the fan-shaped grooves and the fan-shaped convex blocks is 70 degrees;
at this time, after the to-be-transmitted rod moves to the limited position, the PLC circuit sends a signal to the lower sliding block 30, after the lower sliding block 30 drives the lower die 20 to move upwards, the upper die 10 starts to swing after receiving the signal sent by the PLC circuit until the upper die 10 contacts the prefabricated blank 1, and the upper die 10 starts to swing and roll to form, and is provided with a tooth form corresponding to the tooth form of VGR;
after the upward travel of the lower sliding block 30 reaches the height of a set value, the rotary forging forming is stopped, and the surface of the prefabricated blank 1 is subjected to rotary forging to form a needed VGR tooth form, namely a finished product 2;
step five, taking out
After the finished product 2 is obtained, the PLC circuit sends a signal to the pneumatic control system to control the two transmission rods to respectively drive the movable cushion block 70 to reset, the movable cushion block 70 is separated from the finished product, the lower slide block 30 drives the lower die 20 to move downwards, and the machine bench ejector rod 90 drives the lower die ejector rod cushion block 50 and the lower die ejector rod 40 to move towards the upper die 10 to eject the finished product 2.
Example 3
Step one, prefabricating a blank
Obtaining a prefabricated blank 1 by forging extrusion or milling;
step two, sand blasting
After performing sand blasting on the prefabricated blank 1, performing sand blasting on the prefabricated blank 1 by using a sand blasting machine to remove oxide skin and attachments on the surface of the bar;
step three, involucra treatment
Performing a film treatment on the prefabricated blank 1 after the sand blasting treatment, wherein the film treatment is a treatment process of immersing the prefabricated blank 1 after the sand blasting treatment into phosphating solution for 30-60 min and depositing a layer of water-insoluble crystalline phosphate conversion film on the surface of the prefabricated blank 1;
step four, rotary forging forming
The precast blank 1 after the skin membrane treatment is placed in a die cavity of a lower die 20, a PLC circuit controls a transmission rod connected with a mechanical transmission system to work, the transmission rod pushes a movable cushion block 70, so that a movable cushion block concave-convex surface 701 on the movable cushion block 70 is clamped into an end concave-convex surface 11 on the precast blank 1 and pushes the precast blank to a limited position, another transmission rod connected with the mechanical transmission system is clamped into another end concave-convex surface 11 on the precast blank 1 after the pneumatic control system receives a signal sent by the PLC circuit, the movable cushion block concave-convex surface 701 on the movable cushion block 70 connected with the transmission rod is clamped into the other end concave-convex surface 11 on the precast blank 1, the radial positioning of the precast blank 1 is realized, the axial positioning of the precast blank 1 by the movable cushion block 70 is realized through the two movable cushion blocks 70 abutting against two ends of the precast blank 1, the end concave-convex surface 1 is provided with three square convex blocks, the, the two square bumps and the two square grooves are opposite in position, and the area of each square groove and each square bump accounts for 60% of the area of the end face of the prefabricated blank 1;
at this time, after the to-be-transmitted rod moves to the limited position, the PLC circuit sends a signal to the lower sliding block 30, after the lower sliding block 30 drives the lower die 20 to move upwards, the upper die 10 starts to swing after receiving the signal sent by the PLC circuit until the upper die 10 contacts the prefabricated blank 1, and the upper die 10 starts to swing and roll to form, and is provided with a tooth form corresponding to the tooth form of VGR;
after the upward travel of the lower sliding block 30 reaches the height of a set value, the rotary forging forming is stopped, and the surface of the prefabricated blank 1 is subjected to rotary forging to form a needed VGR tooth form, namely a finished product 2;
step five, taking out
After the finished product 2 is obtained, the PLC circuit sends a signal to the mechanical transmission system, controls the two transmission rods to respectively drive the movable cushion block 70 to reset, the movable cushion block 70 is separated from the finished product, the lower slide block 30 drives the lower die 20 to move downwards, and the machine bench ejector rod 90 drives the lower die ejector rod cushion block 50 and the lower die ejector rod 40 to move towards the upper die 10 to eject the finished product 2.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a VGR rack pendulum rolls blank both ends stop device, it includes: go up mould (10), be located lower mould (20) of last mould (10) below, be located prefabricated blank (1) of department in the middle of last mould (10) and lower mould (20), install lower bolster (30) in lower mould (20) below, wear to establish lower mould ejector pin (40) on lower mould (20) and lower bolster (30), be located lower slider (80) of lower bolster (30) below, install lower mould ejector pin (40) below and with wear to establish lower mould ejector pin cushion (50) that board ejector pin (90) on lower slider (80) offset, its characterized in that: prefabricated blank (1) both ends be equipped with tip concave-convex face (11) respectively, the activity cushion concave-convex face (701) that is equipped with on activity cushion (70), the activity cushion concave-convex face (701) that is equipped with on two activity cushions (70) restrict respectively rather than complex tip concave-convex face (11) and rotate, activity cushion (70) and prefabricated blank (1) offset or the separation realizes fixed or the separation to prefabricated blank (1), activity cushion (70) and transfer line fastening, the transfer line links to each other with the hydraulic control system, pneumatic control system or the mechanical transmission system control that provide power.
2. The device of claim 1, wherein the device for limiting the two ends of the VGR rack in swinging and rolling of blanks is characterized in that: the end concave-convex surface (11) and the movable cushion block concave-convex surface (701) are respectively provided with one or more grooves or convex blocks which are triangular, square, fan-shaped, revolution surfaces or a combination thereof.
3. The device of claim 2, wherein the device for limiting the two ends of the VGR rack in swinging and rolling of blanks is characterized in that: the included angle of the triangular or fan-shaped groove or the convex block is 40-70 degrees.
4. The device of claim 2, wherein the device for limiting the two ends of the VGR rack in swinging and rolling of blanks is characterized in that: the area of the end concave-convex surface (11) and the movable cushion block concave-convex surface (701) accounts for 40-60% of the area of the end surface of the prefabricated blank (1).
5. The device of claim 1, wherein the device for limiting the two ends of the VGR rack in swinging and rolling of blanks is characterized in that: the concave-convex surfaces (701) of the movable cushion blocks arranged on the two movable cushion blocks (70) are respectively matched with the shapes of the concave-convex surfaces (11) at the matched ends.
6. An application method of limiting devices at two ends of a VGR rack swing-rolled blank is characterized by comprising the following specific steps:
step one, prefabricating a blank
Obtaining a prefabricated blank (1) by forging extrusion or milling;
step two, sand blasting
After sand blasting is carried out on the prefabricated blank (1), sand blasting is carried out on the prefabricated blank (1) by a sand blasting machine so as to remove oxide skin and attachments on the surface of the bar;
step three, involucra treatment
Performing skin membrane treatment on the prefabricated blank (1) subjected to sand blasting;
step four, rotary forging forming
Placing the precast blank (1) with the skin treated into a die cavity of a lower die (20), controlling a transmission rod connected with a hydraulic control system to work by a PLC circuit, pushing a movable cushion block (70) by the transmission rod, clamping a movable cushion block concave-convex surface (701) on the movable cushion block (70) into an end concave-convex surface (11) of the precast blank (1) and pushing the precast blank (1) to a limited position, and clamping a movable cushion block concave-convex surface (701) on the movable cushion block (70) connected with the transmission rod into another end concave-convex surface (11) on the precast blank (1) by another transmission rod connected with the hydraulic control system after the hydraulic control system receives a signal sent by the PLC circuit;
after the lower sliding block (30) drives the lower die (20) to move upwards, the upper die (10) starts to swing until the upper die (10) contacts the prefabricated blank (1), the swing rolling forming starts, and the upper die (10) is provided with a tooth form corresponding to the tooth form of VGR;
after the upward travel of the lower sliding block (30) reaches the height of a set value, the rotary forging forming is stopped, and the surface of the prefabricated blank (1) is subjected to rotary forging to form the needed VGR tooth profile, namely the finished product (2);
step five, taking out
After a finished product 2 is obtained, the PLC sends a signal to the hydraulic control system, the two transmission rods are controlled to respectively drive the movable cushion blocks 70 to reset, the movable cushion blocks (70) are separated from the finished product, the lower slide block (30) drives the lower die (20) to move downwards, and the machine table ejector rod (90) drives the lower die ejector rod cushion blocks (50) and the lower die ejector rod (40) to move towards the upper die (10) to eject the finished product.
7. The application method of the limiting device for the two ends of the VGR rack swing-rolled blank as claimed in claim 6, wherein: the leather membrane treatment in the third step is a treatment process of immersing the prefabricated blank (1) after sand blasting treatment into phosphating solution for 30-60 min, and depositing a layer of water-insoluble crystalline phosphate conversion membrane on the surface of the prefabricated blank (1).
8. The application method of the limiting device for the two ends of the VGR rack swing-rolled blank as claimed in claim 6, wherein: the hydraulic control system, the pneumatic control system or the mechanical transmission system, the upper die (10) and the lower slide block (30) are respectively connected with the PLC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347999.9A CN112475188A (en) | 2020-11-26 | 2020-11-26 | Limiting device for two ends of VGR rack swing-rolled blank and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347999.9A CN112475188A (en) | 2020-11-26 | 2020-11-26 | Limiting device for two ends of VGR rack swing-rolled blank and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112475188A true CN112475188A (en) | 2021-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011347999.9A Pending CN112475188A (en) | 2020-11-26 | 2020-11-26 | Limiting device for two ends of VGR rack swing-rolled blank and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112475188A (en) |
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2020
- 2020-11-26 CN CN202011347999.9A patent/CN112475188A/en active Pending
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