CN214557095U - VGR rack pendulum rolls blank stop device - Google Patents
VGR rack pendulum rolls blank stop device Download PDFInfo
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- CN214557095U CN214557095U CN202022776286.6U CN202022776286U CN214557095U CN 214557095 U CN214557095 U CN 214557095U CN 202022776286 U CN202022776286 U CN 202022776286U CN 214557095 U CN214557095 U CN 214557095U
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Abstract
The utility model discloses a VGR rack pendulum rolls blank stop device, it includes: the mould, the lower mould, be located the prefabricated blank of department in the middle of last mould and lower mould, install the lower bolster below the lower mould, wear to establish the lower mould ejector pin on lower mould and the lower bolster, the lower slider that is located the lower bolster below, install lower mould ejector pin below and with wear to establish the lower mould ejector pin cushion that offsets of the board ejector pin on the lower slider, lower mould curved surface and lug restriction rather than complex cooperation curved surface and recess rotate, the device is through radial and axial fixed, prevent the product along with the mould swing at VGR rack forming in-process, can be at the make full use of material through using the device, guarantee under the prerequisite of product mechanical properties, improve product profile of tooth precision, stability and production efficiency.
Description
Technical Field
The utility model relates to an auto-parts production technical field specifically is a VGR rack pendulum rolls blank positioner.
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.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the not enough of prior art, the utility model provides a VGR rack pendulum rolls blank positioner, the device can not follow the mould swing through using this blank when the pendulum rolls VGR profile of tooth, and the device improves product profile of tooth precision, stability and production efficiency under the prerequisite of make full use of material, assurance product mechanical properties.
The technical scheme is as follows: in order to realize above purpose, VGR rack pendulum rolls blank positioner, it includes: the device comprises an upper die, a lower die, a prefabricated blank, a lower die plate, a lower die ejector rod, a lower sliding block, a lower die ejector rod cushion block and a lower die ejector rod cushion block, wherein the lower die is positioned below the upper die;
the lower die is fixedly provided with a positioning cushion block, one end of the prefabricated blank abuts against the positioning cushion block, the other end of the prefabricated blank abuts against or is separated from a movable cushion block to fix or separate the prefabricated blank, and the two ends of the prefabricated blank are limited by the positioning cushion block and the movable cushion block to fix the axial position of the prefabricated blank.
As a further preferred aspect of the present invention, the lower mold curved surface and the projection are respectively adapted to the shape of the mating curved surface and the recess.
As a further preference of the present invention, the radian on the fitting curved surface is smaller than the radian on the lower mold curved surface.
As a further preference of the present invention, the groove located at the back of the tooth surface is a triangular groove, a square groove, a fan-shaped groove, a turn-surface groove or a combination thereof.
As a further preferred aspect of the present invention, the ratio of the length of the triangle groove bottom to the diameter of the prefabricated blank is 1: 7-1: and 3, the angle range of the top of the groove is 60-100 degrees, the connection of the prefabricated blank placed into the lower die is more stable and reliable through the proportion, and the blank cannot swing along with the die when the blank is in a swing rolling VGR tooth shape.
As the utility model discloses a further preferred, two planar contained angles of fan-shaped recess be 60 ~ 100, make the connection that the lower mould was put into to prefabricated blank more firm reliable through this proportion, guarantee that the blank can not swing along with the mould when pendulum rolls VGR profile of tooth.
As a further preferred, the lower mould on the lug that is equipped with be located the axis position of lower mould, should set up the manufacturing accuracy who is used for guaranteeing the lug position, ensure lower mould and prefabricated blank complex reliability.
As a further preference of the utility model, activity cushion link to each other with the transfer line, the transfer line links to each other with hydraulic control system, pneumatic control system or the mechanical transmission system control that provides power, when needs carry out axial fixity to prefabricated blank, PLC circuit control transfer line promotes movable cushion, makes a terminal surface of prefabricated blank lean on tightly movable cushion inboard, another transfer line of PLC circuit control continuously stretches out, makes the movable cushion that links to each other with the transfer line and another terminal surface of prefabricated blank offset, has realized the axial positioning of prefabricated blank. 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 the utility model discloses a further preferred, hydraulic control system, pneumatic control system or mechanical transmission system, go up the mould, the lower slider links to each other with the PLC circuit respectively.
Has the advantages that: a VGR rack pendulum rolls blank positioner and application, the device prevents the product along with the mould swing through radial and axial fixed in VGR rack forming process, can improve product profile of tooth precision, stability and production efficiency under the prerequisite of make full use of material, assurance product mechanical properties through using this fixed method.
Drawings
FIG. 1 is a schematic view of a preform;
FIG. 2 is an enlarged partial cross-sectional view of a preform;
FIG. 3 is a partial enlarged view of a lower mold with a triangular protrusion;
FIG. 4 is an enlarged view of a lower die ejector pin hole;
FIG. 5 is a front view of the working state before rotary forging;
FIG. 6 is a left side view of the working state before rotary forging;
FIG. 7 is a schematic view of the working state after rotary milling;
fig. 8 is a partially enlarged view of the preform.
Detailed Description
The invention will be further elucidated with reference to the drawings and the specific embodiments.
As shown in the attached drawings, the utility model discloses a VGR rack pendulum rolls blank stop device, it includes: the structure comprises a prefabricated blank 1, a matching curved surface 11, a groove 12, a lower die curved surface 21, a convex block 22, 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 positioning cushion block 60, a movable cushion block 70, a lower slide block 80 and a machine bench ejector rod 90.
The prefabricated blank 1 is located in the middle of an upper die 10 and a lower die 20, a matching curved surface 11 and a groove 12 are radially arranged on the prefabricated blank 1, a lower die curved surface 21 and a convex block 22 are arranged on the lower die 20, the lower die curved surface 21 and the convex block 22 on the lower die 20 limit rotation of the matching curved surface 11 and the groove 12 matched with the lower die curved surface, the lower die plate 30 is installed below the lower die 20, a lower die ejector rod 40 penetrates through the lower die 20 and the lower die plate 30, a lower sliding block 80 is located below the lower die plate 30, a 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, a positioning cushion block 60 is fixedly arranged on the lower die 20, one end of the prefabricated blank 1 abuts against the positioning cushion block 60, and the other end of the prefabricated blank 1 abuts against or is separated from a movable cushion block 70 to fix or separate the prefabricated blank 1.
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 membrane treatment into a die cavity of a lower die 20, matching a curved surface 11 and a triangular groove 12 on the precast blank 1 to match a lower die curved surface 21 and a triangular convex block 22 on the lower die 20, wherein the ratio of the length of the bottom side of the triangular groove 12 to the diameter of the precast blank 1 is 1: 7, the angle range of the top of the groove is 60 degrees, the lower die curved surface 21 and the triangular convex block 22 limit the rotation of the matched curved surface 11 and the triangular groove 12 matched with the lower die curved surface, one end of the prefabricated blank 1 takes the positioning cushion block 60 fixed on the lower die 20 as a reference surface and is abutted against the reference surface, and after the hydraulic control system receives a signal sent by a PLC (programmable logic controller) circuit, a movable cushion block 70 connected with a hydraulic control system moves towards the other end of the prefabricated blank 1 and is abutted against the other end of the prefabricated blank 1, so that the fixation of the axial position of the prefabricated blank 1 is realized;
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 80, after the lower sliding block 80 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 80 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 form, namely a finished product;
step five, taking out
After the pendulum roller forming is stopped, the PLC circuit sends a signal to the hydraulic control system, the control transmission rod drives the movable cushion block 70 to reset through the transmission rod after receiving the signal of the PLC circuit, the movable cushion block 70 is separated from a finished product, the lower slide block 80 drives the lower die 20 to move downwards, and the machine table 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 and eject the finished product.
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
Placing the precast blank 1 after the skin membrane treatment into a die cavity of a lower die 20, matching a curved surface 11 and a triangular groove 12 on the precast blank 1 to match a lower die curved surface 21 and a triangular convex block 22 on the lower die 20, wherein the ratio of the length of the bottom side of the triangular groove 12 to the diameter of the precast blank 1 is 1: 3, the angle range of the top of the groove is 100 degrees, the lower die curved surface 21 and the triangular convex block 22 limit the rotation of the matched curved surface 11 and the triangular groove 12 matched with the lower die curved surface, one end of the prefabricated blank 1 takes a positioning cushion block 60 fixed on the lower die 20 as a reference surface and is abutted against the reference surface, and after the pneumatic control system receives a signal sent by a PLC (programmable logic controller) circuit, a movable cushion block 70 connected with a pneumatic control system moves towards the other end of the prefabricated blank 1 and is abutted against the other end of the prefabricated blank 1, so that the axial position of the prefabricated blank 1 is fixed;
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 80, after the sliding block 80 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 80 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 form, namely a finished product;
step five, taking out
After the pendulum roller forming is stopped, the PLC circuit sends a signal to the pneumatic control system, the control transmission rod drives the movable cushion block 70 to reset through the transmission rod after receiving the signal of the PLC circuit, the movable cushion block 70 is separated from a finished product, the lower slide block 80 drives the lower die 20 to move downwards, and the machine table 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 and eject the finished product.
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 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 membrane treatment into a die cavity of a lower die 20, wherein a matching curved surface 11 and a fan-shaped groove 12 on the precast blank 1 are matched with a lower die curved surface 21 and a fan-shaped convex block 22 on the lower die 20, the included angle between two planes of the fan-shaped groove 12 is 60 degrees, the lower die curved surface 21 and the fan-shaped convex block 22 limit the matching curved surface 11 and the fan-shaped groove 12 matched with the lower die to rotate, one end of the precast blank 1 takes a positioning cushion block 60 fixed on the lower die 20 as a reference surface and is abutted against the reference surface, and after a transmission rod connected with a mechanical transmission system receives a signal sent by a PLC (programmable logic controller) circuit, a movable cushion block 70 connected with the transmission rod moves towards the other end of the precast blank 1 and is abutted against the other end of the precast blank 1, so as to realize the fixation of the axial position of the precast 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 80, after the lower sliding block 80 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 80 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 form, namely a finished product;
step five, taking out
After the pendulum roller forming is stopped, the PLC circuit sends a signal to the mechanical transmission system, the transmission rod is controlled to drive the movable cushion block 70 to reset through the transmission rod after receiving the signal of the PLC circuit, the movable cushion block 70 is separated from a finished product, the lower slide block 80 drives the lower die 20 to move downwards, and the machine table 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.
Example 4
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
Placing the precast blank 1 after the skin membrane treatment into a die cavity of a lower die 20, wherein a matching curved surface 11 and a fan-shaped groove 12 on the precast blank 1 are matched with a lower die curved surface 21 and a fan-shaped convex block 22 on the lower die 20, the included angle between two planes of the fan-shaped groove 12 is 100 degrees, the lower die curved surface 21 and the fan-shaped convex block 22 limit the matching curved surface 11 and the fan-shaped groove 12 matched with the lower die to rotate, one end of the precast blank 1 takes a positioning cushion block 60 fixed on the lower die 20 as a reference surface and is abutted against the reference surface, and after a transmission rod connected with a hydraulic control system receives a signal sent by a PLC (programmable logic controller) circuit, a movable cushion block 70 connected with the transmission rod moves towards the other end of the precast blank 1 and is abutted against the other end of the precast blank 1, so as to realize the fixation of the axial position of the precast 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 80, after the lower sliding block 80 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 80 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 form, namely a finished product;
step five, taking out
After the pendulum roller forming is stopped, the PLC circuit sends a signal to the hydraulic control system, the control transmission rod drives the movable cushion block 70 to reset through the transmission rod after receiving the signal of the PLC circuit, the movable cushion block 70 is separated from a finished product, the lower slide block 80 drives the lower die 20 to move downwards, and the machine table 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 and eject the finished product.
Example 5
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
Placing the precast blank 1 after the skin membrane treatment into a die cavity of a lower die 20, wherein a matching curved surface 11 and a square groove 12 on the precast blank 1 are matched with a lower die curved surface 21 and a square bump 22 on the lower die 20, the lower die curved surface 21 and the square bump 22 limit the matching curved surface 11 and the square groove 12 matched with the lower die curved surface to rotate, one end of the precast blank 1 takes a positioning cushion block 60 fixed on the lower die 20 as a reference surface and is abutted against the reference surface, and after a transmission rod connected with a mechanical transmission system receives a signal sent by a PLC (programmable logic controller) circuit, a movable cushion block 70 connected with the transmission rod moves towards the other end of the precast blank 1 and is abutted against the other end of the precast blank 1, so that the axial position of the precast blank 1 is fixed;
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 80, after the lower sliding block 80 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 80 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 form, namely a finished product;
step five, taking out
After the pendulum roller forming is stopped, the PLC circuit sends a signal to the mechanical transmission system, the transmission rod is controlled to drive the movable cushion block 70 to reset through the transmission rod after receiving the signal of the PLC circuit, the movable cushion block 70 is separated from a finished product, the lower slide block 80 drives the lower die 20 to move downwards, and the machine table 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.
Example 6
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 into a die cavity of a lower die 20, a plum blossom-shaped groove 12 formed by a matching curved surface 11, a triangle and a revolution surface on the precast blank 1 is matched with a lower die curved surface 21 on the lower die 20 and a plum blossom-shaped lug 22 formed by the triangle and the revolution surface, the plum blossom-shaped lug 22 formed by the lower die curved surface 21, the triangle and the revolution surface limits the rotation of the plum blossom-shaped groove 12 formed by the matching curved surface 11, the triangle and the revolution surface which are matched with the plum blossom-shaped groove, as shown in fig. 8, one end of the preform 1 is positioned to abut against and with reference to a positioning block 60 fixed to the lower die 20, after the hydraulic control system receives the signal sent by the PLC circuit, the transmission rod connected with the hydraulic control system, the movable cushion block 70 connected with the transmission rod moves towards the other end of the prefabricated blank 1 and is abutted against the other end of the prefabricated blank 1, so that the axial position of the prefabricated blank 1 is fixed;
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 80, after the lower sliding block 80 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 80 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 form, namely a finished product;
step five, taking out
After the pendulum roller forming is stopped, the PLC circuit sends a signal to the hydraulic control system, the control transmission rod drives the movable cushion block 70 to reset through the transmission rod after receiving the signal of the PLC circuit, the movable cushion block 70 is separated from a finished product, the lower slide block 80 drives the lower die 20 to move downwards, and the machine table 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 and eject the finished product.
Claims (8)
1. The utility model provides a VGR rack pendulum rolls blank 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: the prefabricated blank (1) is radially provided with a matching curved surface (11) and a groove (12), the lower die (20) is provided with a lower die curved surface (21) and a convex block (22), and the lower die curved surface (21) and the convex block (22) limit the rotation of the matching curved surface (11) and the groove (12) matched with the lower die curved surface;
and a positioning cushion block (60) is fixedly arranged on the lower die (20), one end of the prefabricated blank (1) is abutted against the positioning cushion block (60), and the other end of the prefabricated blank (1) is abutted against or separated from a movable cushion block (70) to realize the fixation or separation of the prefabricated blank (1).
2. The VGR rack rotary milling blank limiting device of claim 1, wherein: the lower die curved surface (21) and the convex block (22) are respectively matched with the shapes of the matching curved surface (11) and the groove (12).
3. The VGR rack rotary milling blank limiting device of claim 1, wherein: the radian on the matching curved surface (11) is smaller than that on the lower die curved surface (21).
4. The VGR rack rotary milling blank limiting device of claim 1, wherein: the grooves (12) on the back of the tooth surface (13) are triangular grooves, square grooves, fan-shaped grooves, revolution surface grooves or a combination thereof.
5. The VGR rack rotary milling blank stop device of claim 4, wherein: the ratio of the length of the bottom side of the triangular groove to the diameter of the prefabricated blank (1) is 1: 7-1: 3, the angle range of the top of the groove is 60-100 degrees.
6. The VGR rack rotary milling blank stop device of claim 4, wherein: the included angle of the two planes of the fan-shaped groove is 60-100 degrees.
7. The VGR rack rotary milling blank limiting device of claim 1, wherein: the movable cushion block (70) is connected with the transmission rod.
8. The VGR rack rotary milling blank stop device of claim 7, wherein: the transmission rod is connected with a hydraulic control system, a pneumatic control system or a mechanical transmission system for providing power in a control mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776286.6U CN214557095U (en) | 2020-11-26 | 2020-11-26 | VGR rack pendulum rolls blank stop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776286.6U CN214557095U (en) | 2020-11-26 | 2020-11-26 | VGR rack pendulum rolls blank stop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214557095U true CN214557095U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022776286.6U Active CN214557095U (en) | 2020-11-26 | 2020-11-26 | VGR rack pendulum rolls blank stop device |
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| Country | Link |
|---|---|
| CN (1) | CN214557095U (en) |
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2020
- 2020-11-26 CN CN202022776286.6U patent/CN214557095U/en active Active
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