CN218192350U

CN218192350U - Key groove and center hole extrusion die of motor shaft

Info

Publication number: CN218192350U
Application number: CN202222500771.XU
Authority: CN
Inventors: 刘川; 胡易; 高凤强; 苏涛
Original assignee: Chongqing Chuangjing Warm Forging Forming Co ltd
Current assignee: Chongqing Chuangjing Warm Forging Forming Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-03
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses a key groove and a center hole extrusion die of a motor shaft, which comprises an upper film seat and an upper female die which can move up and down under the driving of a punching machine, and a lower female die, a backing plate and a lower film seat are arranged under the upper female die and from top to bottom in sequence; the middle part of the upper female die is provided with an assembling through hole for sleeving a motor shaft semi-finished product, and the middle part of the lower female die is provided with a key groove forming hole; a plurality of extruding bulges for extruding the key groove are circumferentially arranged in the key groove forming hole at intervals; an upper mold core capable of moving axially under the drive of a support pillar is arranged in the middle of the upper mold base, and a central hole extrusion bulge for extruding a central hole of a motor shaft is arranged on the lower end face of the upper mold core; the middle part of the base plate is provided with a through hole which is coaxial with the key groove forming hole and used for placing the lower end of the motor shaft semi-finished product, the lower end of the through hole is provided with a lower mold core which can move upwards along the axial direction of the through hole under the jacking action of a mandril, and the top surface of the lower mold core is provided with a central hole extrusion lug which is used for extruding the central hole of the motor shaft.

Description

Key groove and center hole extrusion die of motor shaft

Technical Field

The utility model relates to a preparation field of motor shaft, concretely relates to keyway and centre bore extrusion die of motor shaft.

Background

At present, in order to be assembled with other parts, a key groove, a center hole, etc. are generally provided on a motor shaft (as shown in fig. 1). When a motor shaft is manufactured, generally, blanking is performed, and then the blanked bar is subjected to processes of cutting, milling, extruding or stamping and the like. At present, for a motor shaft with a central hole, a semi-finished product is formed by cutting, turning and stamping a middle step, then a key groove is extruded, and finally a product with the key groove is assembled on a clamp for positioning and is drilled by a drilling machine (for example, a motor shaft manufacturing process disclosed in the Chinese patent with the application number of 2019113207493). The motor shaft semi-finished product generally speaking, when adopting above-mentioned mode processing centre bore, once only can process a centre bore, processing mode is comparatively complicated, and the centre bore location is comparatively wasted time and energy.

In order to solve the problems, the applicant wants to design an extrusion die, and the processing of the key groove and the central hole of the motor shaft is realized through the die, so that the processing mode is simplified on the premise of effectively ensuring the processing quality.

Disclosure of Invention

The above-mentioned not enough to prior art exists, the utility model aims to provide a can enough extrude the keyway, can extrude keyway and centre bore extrusion die of two centre bores simultaneously again.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a key groove and center hole extrusion die of a motor shaft comprises an upper film seat and an upper female die which can move up and down under the driving of a punching machine, wherein the upper film seat is positioned on the upper female die, and a lower female die, a base plate and a lower film seat are sequentially arranged below the upper female die and from top to bottom; the middle part of the upper female die is provided with an assembling through hole which is used for sleeving a semi-finished product of the motor shaft and corresponds to the shape and the size of the upper end of the motor shaft, and the middle part of the lower female die is provided with a key groove forming hole which is coaxial with the assembling through hole; a plurality of extruding bulges for extruding the key groove are circumferentially arranged in the key groove forming hole at intervals; an upper mold core capable of moving axially under the drive of a support pillar is arranged in the middle of the upper mold base, a central hole extrusion bulge for extruding a central hole of a motor shaft is arranged on the lower end face of the upper mold core, and the central line of the upper mold core and the central line of the central hole extrusion bulge are overlapped with the central line of the assembling through hole; the middle of the base plate is provided with a through hole which is coaxial with the key groove forming hole and used for placing the lower end of the motor shaft semi-finished product, the lower end of the through hole is provided with a lower mold core which can move upwards along the axial direction of the through hole under the jacking action of a jacking rod, the top surface of the lower mold core is provided with a central hole extrusion lug which is used for extruding a central hole of a motor shaft, and the central line of the lower mold core and the central line of the central hole extrusion lug are overlapped with the central line of the through hole.

Furthermore, an upper die plate is further arranged on the upper die base, a vertical through hole corresponding to the assembling through hole is formed in the middle of the upper die plate, a return spring is arranged in the vertical through hole, and a top column used for pressing the return spring and the upper die core is arranged on the return spring.

Furthermore, the backing plate consists of an upper backing plate, a middle backing plate and a lower backing plate, and the lower mold core is arranged in the lower backing plate.

Furthermore, the ejector rod is arranged in the lower film base, and the ejector rod and the lower film core are coaxial.

Furthermore, a ball guide sleeve is also arranged on the lower film seat and sleeved on the base plate; an upper guide cylinder matched with the ball guide sleeve is arranged at the lower end of the upper film seat, the upper end of the upper guide cylinder is sleeved on the upper film seat and the upper female die, and the lower end of the upper guide cylinder is sleeved on the ball guide sleeve.

Furthermore, an upper template and a lower template are respectively arranged above the upper membrane seat and below the lower membrane seat, at least one guide sleeve which is vertically arranged is arranged on the upper template, and a guide post which corresponds to the guide sleeve and is sleeved in the guide sleeve is arranged on the lower template.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the extrusion bulge in the lower concave die can be extruded to form a key groove of the motor shaft, and after the key groove is formed, the upper die core and the lower die core are respectively pressed and jacked through controlling the jacking column and the jacking rod, so that a semi-finished product after the key groove is formed is extruded through a center hole. So that key groove extrusion and central hole extrusion are realized through a set of dies. The center hole and the key groove which are extruded by the method have good forming quality and are more convenient to operate.

Drawings

FIG. 1 is a schematic sectional view of a thin-walled internally splined tube after forming in an embodiment;

FIG. 2 is a schematic structural diagram of the extrusion die in the embodiment in a keyway extrusion state after the die assembly;

FIG. 3 is a schematic structural diagram of the extrusion die in the embodiment in a central hole extrusion state after the die assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present application is further described below with reference to the accompanying drawings.

As shown in fig. 1, a motor shaft to be manufactured in this embodiment includes a motor shaft body 100, a step 101 is disposed in the middle of the motor shaft body 100, a central hole 102 is disposed at both the upper and lower ends of the motor shaft along the axial direction, and four key slots are circumferentially disposed at the lower end of the motor shaft and near the step 101. When the motor shaft is manufactured, a semi-finished product of the motor shaft is formed by cutting, turning and stamping the middle step. And then key slot extrusion and central hole extrusion are carried out on the motor shaft semi-finished product through the key slot and the central hole extrusion die in sequence.

As shown in fig. 2 and 3, the key groove and center hole extrusion die of the motor shaft provided in this embodiment includes an upper film base 1 and an upper female die 6 that can move up and down under the driving of a punch, where the upper film base 1 is located on the upper female die 6, and a lower female die 8, a backing plate 9, and a lower film base 10 are sequentially arranged below the upper female die 6 and from top to bottom; an assembly through hole used for sleeving a motor shaft semi-finished product 7 and corresponding to the shape and the size of the upper end of a motor shaft is arranged in the middle of the upper female die 6, and a key groove forming hole coaxial with the assembly through hole is arranged in the middle of the lower female die 8; a plurality of extruding protrusions 81 for extruding the key groove are circumferentially arranged in the key groove forming hole at intervals; an upper mold core 5 capable of moving axially under the drive of a support pillar 3 is arranged in the middle of the upper mold base 1, a central hole extrusion bulge 51 for extruding a central hole of a motor shaft is arranged on the lower end face of the upper mold core 5, and the central line of the upper mold core 5 and the central line of the central hole extrusion bulge are overlapped with the central line of the assembling through hole; the middle of the backing plate 9 is provided with a through hole which is coaxial with the key groove forming hole and used for placing the lower end of the motor shaft semi-finished product, the lower end of the through hole is provided with a lower mold core 11 which can move upwards along the axial direction of the through hole under the jacking action of a jacking rod 13, the top surface of the lower mold core 11 is provided with a central hole extrusion lug 111 used for extruding a central hole of a motor shaft, and the central line of the lower mold core 11 and the central line of the central hole extrusion lug 111 are overlapped with the central line of the through hole.

After the extrusion die is adopted, the key groove of the motor shaft can be formed by extruding the extrusion bulge in the lower concave die, and after the key groove is formed, the upper die core 5 and the lower die core 11 are respectively pressed and jacked by controlling the jacking column 3 and the jacking rod 13, so that a semi-finished product after the key groove is formed is subjected to center hole extrusion. Because the central lines of the upper mold core and the lower mold core for extruding the central hole are overlapped, and the central hole extruding bulge 51 of the upper mold core and the central hole extruding lug of the lower mold core are positioned on the same axis, the molding quality of the two central holes can be effectively ensured. And the key slot extrusion and the central hole extrusion are formed by extruding through the same set of die, so that the extrusion cost can be effectively saved.

Specifically, before extrusion, the motor shaft semi-finished product 7 is firstly sleeved on the upper female die 6, then the upper die seat, the upper female die and the motor shaft semi-finished product 7 are driven by the punch to move downwards and axially, in the moving process, the lower end of the motor shaft semi-finished product 7 extends into a key groove forming hole of the lower female die 8 and a through hole of the cushion block 9 until a step of the motor shaft semi-finished product 7 is close to the lower female die 8, and then the formed extrusion protrusion 81 extrudes the motor shaft semi-finished product 7 to form a key groove (as shown in fig. 2). Then, the ejection column 3 is controlled to go down and the ejection rod 13 is ejected. At this time, the upper mold core 5 descends under the extrusion of the top pillar 3 until the upper mold core abuts against the motor shaft semi-finished product 7, and then the top of the motor shaft semi-finished product 7 is extruded to form a central hole at the upper end. Under the jacking action of the jacking rod 13, the lower die core 11 jacks up until the lower end face of the motor shaft semi-finished product 7 abuts against, and then the bottom of the motor shaft semi-finished product 7 is extruded to form a lower center hole (as shown in fig. 3).

In order to avoid hard contact between the upper mold core and the top column, an upper mold plate 2 is further arranged on the upper mold base 1, a vertical through hole corresponding to the assembling through hole is formed in the middle of the upper mold plate 2, a return spring 4 is arranged in the vertical through hole, and the top column 3 used for pressing down the return spring 4 and the upper mold core 5 is arranged on the return spring 4. The return spring 4 is provided to be compressed when pressed and to return to an initial state while forming an upward elastic force to the jack when the jack moves up.

As shown in fig. 2 and 3, the shim plate 9 in this embodiment is composed of an upper shim plate 91, a middle shim plate 92 and a lower shim plate 93, and the lower mold core 11 is placed in the lower shim plate 93. The ejector rod 13 is arranged in the lower film seat 10, and the ejector rod 13 and the lower mold core 11 are coaxial.

The lower film seat 10 is also provided with a ball guide sleeve 16, and the ball guide sleeve 16 is sleeved on the backing plate 9; an upper guide cylinder 17 matched with the ball guide sleeve 16 is arranged at the lower end of the upper film seat 1, the upper end of the upper guide cylinder 17 is sleeved on the upper film seat 1 and the upper female die 6, and the lower end of the upper guide cylinder 17 is sleeved on the ball guide sleeve 16. After the ball guide sleeve is arranged, the upper guide cylinder can be effectively ensured to slide up and down along the axial direction of the ball guide sleeve, and the upper die moves downwards for guiding.

The ball guide sleeve 16 is a circular guide sleeve, a plurality of balls are uniformly arranged on the guide sleeve, and the balls are embedded on the outer wall of the guide sleeve and can roll under the action of external force, so that friction force is reduced.

On the basis of adopting the ball uide bushing to lead, for further increase the direction effect, be equipped with an cope match-plate pattern 2 and lower bolster 12 respectively above upper die base 1, below lower die base 10, be equipped with at least one uide bushing 14 that is vertical setting on cope match-plate pattern 2, be equipped with on lower bolster 12 with uide bushing 14 corresponding, and the guide pillar 15 of cover in uide bushing 14.

In this embodiment, still be equipped with a backing plate between last membrane seat 1 and last die 6, be equipped with the circular port in the backing plate middle part, this circular port corresponds with the hole in last membrane seat middle part for mold core 5 is gone up in the assembly. The lower membrane seat in this embodiment comprises first membrane seat and second membrane seat, and the upper membrane seat comprises first upper membrane seat and second upper membrane seat, goes up the mould core and establishes in the second upper membrane seat.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions.

Claims

1. A key groove and center hole extrusion die of a motor shaft comprises an upper film seat and an upper female die which can move up and down under the driving of a punching machine, wherein the upper film seat is positioned on the upper female die, and a lower female die, a base plate and a lower film seat are sequentially arranged below the upper female die and from top to bottom; the motor shaft semi-finished product assembling device is characterized in that an assembling through hole which is used for sleeving a motor shaft semi-finished product and corresponds to the shape and the size of the upper end of a motor shaft is arranged in the middle of an upper female die, and a key groove forming hole which is coaxial with the assembling through hole is arranged in the middle of a lower female die; a plurality of extruding bulges for extruding the key groove are circumferentially arranged in the key groove forming hole at intervals; an upper mold core capable of moving axially under the drive of a support pillar is arranged in the middle of the upper mold base, a central hole extrusion bulge for extruding a central hole of a motor shaft is arranged on the lower end face of the upper mold core, and the central line of the upper mold core and the central line of the central hole extrusion bulge are overlapped with the central line of the assembling through hole; the middle of the base plate is provided with a through hole which is coaxial with the key groove forming hole and used for placing the lower end of the motor shaft semi-finished product, the lower end of the through hole is provided with a lower mold core which can move upwards along the axial direction of the through hole under the jacking action of a jacking rod, the top surface of the lower mold core is provided with a central hole extrusion lug which is used for extruding a central hole of a motor shaft, and the central line of the lower mold core and the central line of the central hole extrusion lug are overlapped with the central line of the through hole.

2. The key groove and central hole extruding die of motor shaft as claimed in claim 1, wherein an upper die plate is further provided on the upper die base, a vertical through hole corresponding to the assembling through hole is provided in the middle of the upper die plate, a return spring is provided in the vertical through hole, and a top post for pressing down the return spring and the upper die core is provided on the return spring.

3. The key slot and center hole extrusion die for a motor shaft as set forth in claim 1 or 2, wherein said spacer is composed of an upper spacer, a middle spacer and a lower spacer, and said lower die core is disposed in said lower spacer.

4. The motor shaft keyway and center hole extrusion die of claim 3, wherein the ejector pin is disposed in the lower die holder, the ejector pin being concentric with the lower die core.

5. The key slot and center hole extrusion die of motor shaft of claim 1, 2 or 4, wherein a ball guide sleeve is further provided on the lower film seat, said ball guide sleeve being sleeved on the backing plate; an upper guide cylinder matched with the ball guide sleeve is arranged at the lower end of the upper film seat, the upper end of the upper guide cylinder is sleeved on the upper film seat and the upper female die, and the lower end of the upper guide cylinder is sleeved on the ball guide sleeve.

6. The key slot and central hole extruding die of motor shaft of claim 5, wherein an upper die plate and a lower die plate are respectively disposed above the upper die plate and below the lower die plate, at least one guide sleeve is vertically disposed on the upper die plate, and a guide post is disposed on the lower die plate, corresponding to the guide sleeve, and sleeved in the guide sleeve.