CN113001009B

CN113001009B - New energy automobile structure friction welding device

Info

Publication number: CN113001009B
Application number: CN202110250892.0A
Authority: CN
Inventors: 陶诚; 张贤明; 黎家富; 向摇; 张艺尧; 徐光周
Original assignee: Guangdong Minglida Technology Co Ltd
Current assignee: Guangdong Minglida Technology Co Ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2022-09-09
Anticipated expiration: 2041-03-08
Also published as: CN113001009A

Abstract

The invention discloses a friction welding device for a new energy automobile structure, which comprises a clamping component used for clamping a workpiece, and a transmission shaft which is driven by a driving motor and is used for connecting the clamping component with an external driving motor, wherein an emergency stop pushing piece used for carrying out emergency stop on the transmission shaft is sleeved on the transmission shaft, the emergency stop pushing piece comprises a connecting ring and an emergency stop inertia conversion piece which are sleeved on the transmission shaft, a connecting gap is formed between the emergency stop inertia conversion piece and the connecting ring, a clamping ring which is matched with the connecting ring and is fixed on the transmission shaft is arranged in the connecting gap, when in use, the connection can be carried out through the connecting ring and the transmission shaft, further, in the emergency stop process, the inertia potential energy of the transmission shaft in high-speed rotation can be converted into the advancing kinetic energy of the transmission shaft through the emergency stop inertia conversion piece, and further in the emergency stop process, the problem that the machine tool is easy to be impacted greatly when suddenly stopped can be solved by further pressing the workpiece.

Description

New energy automobile structure friction welding device

Technical Field

The invention relates to the technical field of friction welding, in particular to a friction welding device for a new energy automobile structural part.

Background

Friction welding is a solid state welding method in which a workpiece is plastically deformed under pressure by using heat generated by friction of a contact surface of the workpiece as a heat source, and welding is performed by generating frictional heat and plastic deformation heat at a friction surface and a region in the vicinity thereof by using relative motion between welding contact end surfaces under the action of constant or increasing pressure and torque, so that the temperature of the region in the vicinity thereof is increased to a temperature range close to but generally lower than a melting point, the deformation resistance of a material is reduced, the plasticity is improved, an oxide film at an interface is broken, and the material is plastically deformed and flows under the action of a top forging pressure, and the molecular diffusion and recrystallization at the interface are performed to realize welding.

Compared with other welding modes, the friction welding mode has the advantages that the welding is firmer, the friction welding mode is more suitable for welding large workpieces, the friction welding mode is adopted for machining the automobile body for machining the automobile, and the structural strength is more excellent.

When the current rotary friction welding is used, the problem of unstable welding caused by relative movement in the process of cooling a workpiece needs to be avoided in an emergency stop mode, but the corresponding machine tool has larger inertia potential energy in the process of emergency stop, so that the machine tool has extremely high requirements on a brake pad of the machine tool, and also needs to have stronger shock resistance, so that equipment needs to be frequently overhauled and maintained when in use, and the use cost is greatly increased.

Disclosure of Invention

The invention aims to provide a friction welding device for a new energy automobile structural part, which aims to solve the technical problems that in the prior art, sudden stop of a machine tool has large inertia potential energy, extremely high requirements on a brake pad of the machine tool are met, and the machine tool is required to have high impact resistance, so that frequent overhaul and maintenance are required.

In order to solve the technical problems, the invention specifically provides the following technical scheme:

a friction welding device for a new energy automobile structure comprises a clamping component used for clamping a workpiece, and a transmission shaft driven by a driving motor and used for connecting the clamping component with an external driving motor, wherein an emergency stop pushing component used for carrying out emergency stop on the transmission shaft is sleeved on the transmission shaft, the emergency stop pushing component comprises a connecting ring and an emergency stop inertia conversion component which are sleeved on the transmission shaft, a connecting gap is formed between the emergency stop inertia conversion component and the connecting ring, a clamping ring which is matched with the connecting ring and fixed on the transmission shaft is arranged in the connecting gap, a pushing component is arranged on one side of the connecting ring, which is far away from the emergency stop inertia conversion component, a guiding limiting groove used for guiding the connecting ring to move is arranged on one side of the emergency stop inertia conversion component, which faces the connecting ring, and pushes the connecting ring to move so that the connecting ring is attached to the emergency stop inertia conversion component after being meshed with the clamping ring, furthermore, the scram pushing piece is embedded with the connecting ring through the guide limiting groove, so that the transmission shaft scrams and moves towards the axial direction of the transmission shaft.

As a preferable scheme of the present invention, the connection ring has a concave structure facing the snap ring, a plurality of snap grooves are formed in the inner side of the connection ring in an annular array with respect to the central axis of the connection ring, and a plurality of snap blocks matched with the snap grooves are formed in the snap ring in an annular array with respect to the central axis of the snap ring.

As a preferred scheme of the present invention, the pushing component includes a push rod sleeved on the connecting ring, the push rod is driven by the linear driving mechanism to move along the axial direction of the transmission shaft, a pushing protrusion is disposed on one side of the push rod facing the connecting ring, a pushing groove is disposed on the connecting ring, the pushing groove is matched with the pushing protrusion and coaxial with the connecting ring, and the push rod drives the connecting ring to be connected with the clamping ring through the engagement of the pushing protrusion and the pushing groove;

the width of the pushing groove is larger than that of the pushing lug.

As a preferred scheme of the present invention, a friction cone is disposed between the snap ring and the connection ring, the friction cone is sleeved on the transmission shaft and is used for synchronizing the rotation speeds of the connection ring and the snap ring, and the connection ring is moved to a position flush with the snap ring through the friction cone.

As a preferable aspect of the present invention, the width of the connection ring is greater than the sum of the width of the snap ring and the width of the friction cone.

As a preferable scheme of the present invention, the emergency stop inertia conversion part includes an emergency stop block which is sleeved on the transmission shaft and is subjected to emergency stop by an external hydraulic brake component, the guide limit groove is formed on one side of the emergency stop block facing the connection ring, the connection ring is provided with a guide block which is matched with the guide limit groove, and the connection ring is connected with the emergency stop block through the embedding of the guide block and the guide limit groove, so that the connection ring is subjected to emergency stop and moves along the guide limit groove under the action of the guide limit groove.

As a preferable scheme of the present invention, a buffer plate is slidably connected to one side of the emergency stop block facing the connection ring through a spring, an auxiliary hole for guiding a limit groove is formed in the buffer plate, the guide block is inserted into the guide limit groove through the auxiliary hole, the guide block is pushed by a pushing member to rub against the buffer plate, so that the connection ring drives the emergency stop block to rotate at a low speed, and the external hydraulic brake member further scrams the emergency stop block, so that the transmission shaft scrams and moves along the guide limit groove.

As a preferable scheme of the present invention, an arc structure attached to the guide block is provided on a side of the auxiliary hole facing away from the rotation direction of the transmission shaft.

As a preferable scheme of the present invention, the guide limit groove and the guide block are both disposed to be inclined toward the rotation direction of the transmission shaft, and the inclination angle of the guide limit groove is not greater than 5 degrees.

Compared with the prior art, the invention has the following beneficial effects:

when the rapid-stopping device is used, the rapid-stopping device can be connected with the transmission shaft through the connecting ring, further, in the process of rapid stopping, the inertia potential energy generated when the transmission shaft rotates at a high speed can be converted into the advancing kinetic energy of the transmission shaft through the rapid-stopping inertia conversion piece, further, in the process of rapid stopping, the problem that a machine tool is easy to damage in rapid stopping can be avoided in a mode of further extruding a workpiece, meanwhile, the workpiece is further tightly attached in a hot-melting state, and the structural strength of the welded workpiece can be effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the embodiment of the present invention during the separation of the welding;

FIG. 3 is a schematic view of a welded joint according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a guide block in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a buffer plate according to an embodiment of the present invention.

The reference numerals in the drawings denote the following, respectively:

1-a transmission shaft; 2-a scram pusher; 3-connecting rings; 4-sudden stop inertia conversion piece; 5-a snap ring; 6-a pushing member; 7-guiding a limiting groove; 8-a clamping groove; 9-a fixture block;

401-scram block; 402-a boot block; 403-a buffer plate; 404-auxiliary holes;

601-a push rod; 602-pushing the bump; 603-push groove; 604-friction cone.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the invention provides a friction welding device for a new energy automobile structure, which includes a clamping component for clamping a workpiece, and a transmission shaft 1 driven by a driving motor and used for connecting the clamping component with an external driving motor, wherein a sudden stop pushing member 2 for performing a sudden stop on the transmission shaft 1 is sleeved on the transmission shaft 1, the sudden stop pushing member 2 includes a connection ring 3 and a sudden stop inertia conversion member 4 both sleeved on the transmission shaft 1, a connection gap is formed between the sudden stop inertia conversion member 4 and the connection ring 3, a clamping ring 5 matched with the connection ring 3 and fixed on the transmission shaft 1 is arranged in the connection gap, a pushing component 6 is arranged on one side of the connection ring 3 away from the sudden stop inertia conversion member 4, and a guiding and limiting groove 7 for guiding the connection ring 3 to move is arranged on one side of the sudden stop inertia conversion member 4 facing the connection ring 3, the pushing component 6 pushes the connecting ring 3 to move, so that the connecting ring 3 is attached to the sudden stop inertia converter 4 after being meshed with the clamping ring 5, and further, the sudden stop pushing component 2 is embedded with the connecting ring 3 through the guiding limiting groove 7, so that the transmission shaft 1 is suddenly stopped and moves in the axial direction of the transmission shaft.

The friction welding device further comprises a clutch component, the clutch component can adopt a component which is the same as an automobile clutch principle, and the transmission shaft can be disconnected with the driving motor in the emergency stop process, so that the problem that the driving motor is easy to damage in the emergency stop process is avoided.

In addition, in order to ensure that the transmission shaft 1 can move along the axial direction when in use, the transmission shaft 1 can preferably be two parts, one part is a fixed section, the other part is a movable section, the fixed section and the movable section are in sliding connection, the fixed section is connected with a clutch part, and in order to control the relative position between the fixed section and the movable section conveniently, a matched control structure can be further arranged on the movable section, so that the problem of movement can not occur when a workpiece is welded.

Go-between 3 is towards the concave font structure of joint ring 5, has a plurality of draw-in grooves 8 about 3 central axis annular arrays of go-between in the inboard of go-between 3, and has a plurality of and draw-in groove 8 assorted fixture blocks 9 about 5 central axis annular arrays of joint ring on joint ring 5.

The side of the clamping block 9 facing the clamping groove 8 is of a conical structure, so that the stability of the clamping block 9 during connection is ensured, the clamping block 9 and the clamping ring 5 are preferably of an integrated structure, and the problem that the clamping block 9 on the clamping ring 5 is easily broken due to large force when the transmission shaft 1 is suddenly stopped by the clamping ring 5 is solved.

The connecting ring 3 and the transmission shaft 1 are separated from each other under normal conditions, and are connected only when the machine tool is in a sudden stop, so that the problem that the machine tool is easily abraded due to the fact that the machine tool is in a rotating state for a long time is mainly avoided, and meanwhile, the problem that when the equipment is in normal use, too many parts are connected with the transmission shaft 1, and kinetic energy loss can be greatly increased is also avoided.

After a force is applied to enable the connecting ring 3 to be sleeved on the clamping ring 5, the relative position of the connecting ring 3 and the clamping ring 5 can be fixed under the effect of the structure of the connecting ring 3, the clamping ring 5 is pushed to move through the movement of driving the connecting ring 3 conveniently, and the clamping ring 5 is fixedly connected with the transmission shaft 1, so that the transmission shaft 1 can be driven to move.

As shown in fig. 1 to 3, the pushing component 6 includes a push rod 601 sleeved on the connection ring 3, the push rod 601 is driven by a linear driving mechanism to move along the axial direction of the transmission shaft 1, a pushing protrusion 602 is disposed on one side of the push rod 601 facing the connection ring 3, a pushing groove 603 is disposed on the connection ring 3 and is coaxial with the connection ring 3, the push rod 601 drives the connection ring 3 to be connected with the snap ring 5 by engaging the pushing protrusion 602 with the pushing groove 603, wherein the width of the pushing groove 603 is greater than the width of the pushing protrusion 602.

The linear driving mechanism is a conventional driving structure, preferably an electric push rod, when in use, the push rod 601 is pushed to move, the push rod 601 can realize the movement of the connecting ring 3 by the embedding of the push lug 602 and the push groove 603, and the push lug 602 can slide in the push groove 603, so when the connecting ring 3 is connected with the clamping ring 5 and rotates along with the rotation of the transmission shaft 1, the push rod 601 can normally connect with the connecting ring 3 in a rotating state by the embedding of the push lug 602 and the push groove 603.

The width of the pushing slot 603 is larger than that of the pushing projection 602, which mainly provides a movable gap for the movement of the connecting ring 3 during the subsequent sudden stop, so as to avoid the problem of interference of the movement.

The above-described control structure provided on the movable section may preferably be in accordance with the structure of the pushing member 6.

A friction cone 604 which is sleeved on the transmission shaft 1 and used for synchronizing the rotating speeds of the connecting ring 3 and the clamping ring 5 is arranged between the clamping ring 5 and the connecting ring 3, and the connecting ring 3 is excessively arranged at a position which is flush with the clamping ring 5 and is embedded through the friction cone 604.

The friction cone 604 is a transitional component, which is consistent with the operating principle of the automobile transmission, that is, two objects with different movement speeds can rotate at the same speed under the action of the friction cone 604, and further, the connecting ring 3 can be normally connected with the snap ring 5 in an embedded manner in the using process.

The width of the connection ring 3 is greater than the sum of the width of the snap ring 5 and the width of the friction cone 604, which mainly prevents a portion of the snap ring 5 from being exposed out of the connection ring 3 after the connection ring 3 is completely snapped to the snap ring 5, and further prevents the connection ring 3 from sticking to the sudden stop inertia converter 4.

As shown in fig. 1, 4 and 5, the sudden stop inertia conversion part 4 includes a sudden stop block 401 that is sleeved on the transmission shaft 1 and is suddenly stopped by an external hydraulic brake component, a guide limit groove 7 is formed on one side of the sudden stop block 401 facing the connection ring 3, a guide block 402 that is matched with the guide limit groove 7 is arranged on the connection ring 3, and the connection ring 3 is connected with the sudden stop block 401 through the engagement of the guide block 402 and the guide limit groove 7, so that the connection ring 3 makes the transmission shaft 1 suddenly stop and move along the guide limit groove 7 under the action of the guide limit groove 7.

The external hydraulic brake component is a conventional brake component that primarily controls the hard stop of the hard stop block 401.

The guide limiting groove 7 and the guide block 402 are both arranged in an inclined way towards the rotating direction of the transmission shaft 1, the inclination angle of the guide limiting groove 7 is not more than 5 degrees, when the guide device is used, the connecting ring 3 can gradually face the scram block 401 under the pushing of the pushing component 6, after the guide limiting groove is closed to a certain degree, the guide block 402 can be clamped in the guide limiting groove 7, the scram block 401 is fixed by an external hydraulic brake component, so that the machine tool can be stopped when the guide block 402 is clamped in the guide limiting groove 7, the inertial potential energy of the rotation of the transmission shaft 1 can directly impact the guide block 402 at the moment, the guide limiting groove 7 has a certain inclination angle, under the impact force, the connecting ring 3 can drive the transmission shaft 1 to move towards the axial direction, the purpose of extruding the workpiece during the scram is further realized, and the impact of the machine tool during the scram can be effectively reduced, meanwhile, the workpiece is extruded, so that the workpiece can be further closely contacted in the cooling process.

There is buffer plate 403 in one side of scram piece 401 towards connecting ring 3 through spring sliding connection, set up on buffer plate 403 with the auxiliary hole 404 of guide spacing groove 7, guide piece 402 is for running through auxiliary hole 404 and guide spacing groove 7 gomphosis mutually, guide piece 402 promotes and rubs with buffer plate 403 by pushing component 6, so that connecting ring 3 drives scram piece 401 low-speed rotation, further carry out the scram to scram piece 401 by external hydraulic braking part, so that transmission shaft 1 carries out the scram and moves along guide spacing groove 7.

The function of the buffer plate 403 and the function of the friction cone 604 are the same, that is, when the guide block 402 is primarily contacted with the buffer plate 403, the sudden stop block 401 can be driven to rotate by friction, the rotation speed of the sudden stop block 401 is controlled by an external hydraulic braking component, so that the rotation speed of the sudden stop block 401 is kept within a certain range, when the connecting ring 3 moves to a certain position, the force applied by a spring can be overcome, the guide block 402 crosses the auxiliary hole 404 to complete the embedding with the guide limiting groove 7, at this time, the external hydraulic braking component is started to perform sudden stop, the sudden stop block 401 stops rotating, the inertia potential energy of the transmission shaft 1 can be converted into the force of forward extrusion of a workpiece, that is, a speed-up mode is used in advance to avoid that the connecting ring 3 is connected with the sudden stop block 401 to generate a large impact force, and primary speed reduction is synchronously realized, after the connecting ring 3 is connected with the sudden stop block 401, secondary sudden stop is performed by the external hydraulic braking component, the scram is realized in a two-stage speed reduction buffering mode, so that the welding stability is ensured, and the problem that the machine tool is subjected to larger impact force due to larger rotating speed of the transmission shaft 1 is solved.

The auxiliary hole 404 is the arc structure of laminating guide block 402 on the side opposite to the rotation direction of propeller shaft 1, namely guide block 402 can extrude buffer plate 403 when gradually moving towards buffer plate 403, because the auxiliary hole 404 is the arc structure of laminating guide block 402 on the side opposite to the rotation direction of propeller shaft 1, therefore the extrusion degree can make guide block 402 cross auxiliary hole 404 and guide limit groove 7 to be embedded when a certain range.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims

1. A friction welding device for a new energy automobile structure comprises a clamping component used for clamping a workpiece and a transmission shaft (1) driven by a driving motor and used for connecting the clamping component with an external driving motor, and is characterized in that an emergency stop pushing piece (2) used for carrying out emergency stop on the transmission shaft (1) is sleeved on the transmission shaft (1), the emergency stop pushing piece (2) comprises a connecting ring (3) and an emergency stop inertia conversion piece (4) which are sleeved on the transmission shaft (1), a connecting gap is formed between the emergency stop inertia conversion piece (4) and the connecting ring (3), a clamping ring (5) which is matched with the connecting ring (3) and fixed on the transmission shaft (1) is arranged in the connecting gap, and a pushing component (6) is arranged on one side, far away from the emergency stop inertia conversion piece (4), of the connecting ring (3), a guide limiting groove (7) for guiding the connecting ring (3) to move is arranged on one side, facing the connecting ring (3), of the sudden stop inertia conversion piece (4), the pushing part (6) pushes the connecting ring (3) to move so that the connecting ring (3) is attached to the sudden stop inertia conversion piece (4) after being meshed with the clamping ring (5), and the sudden stop pushing piece (2) is further embedded with the connecting ring (3) through the guide limiting groove (7) so that the transmission shaft (1) is subjected to sudden stop and moves in the axial direction of the transmission shaft;

the scram inertia conversion piece (4) comprises a scram block (401) which is sleeved on the transmission shaft (1) and is scrammed by an external hydraulic brake component, the guide limiting groove (7) is formed in one side, facing the connecting ring (3), of the scram block (401), a guide block (402) matched with the guide limiting groove (7) is arranged on the connecting ring (3), the connecting ring (3) is connected with the scram block (401) through embedding of the guide block (402) and the guide limiting groove (7), and the transmission shaft (1) is scrammed and moves along the guide limiting groove (7) under the action of the guide limiting groove (7) by the connecting ring (3);

a buffer plate (403) is connected to one side, facing the connecting ring (3), of the sudden stop block (401) in a sliding mode through a spring, an auxiliary hole (404) which is used for guiding the limiting groove (7) is formed in the buffer plate (403), the guide block (402) penetrates through the auxiliary hole (404) and is embedded with the guiding limiting groove (7), the guide block (402) is pushed by a pushing component (6) to rub against the buffer plate (403), so that the connecting ring (3) drives the sudden stop block (401) to rotate at a low speed, and further the sudden stop block (401) is subjected to sudden stop by the external hydraulic brake component, so that the transmission shaft (1) is subjected to sudden stop and moves along the guiding limiting groove (7);

and one side of the auxiliary hole (404), which is back to the rotating direction of the transmission shaft (1), is of an arc structure attached with the guide block (402).

2. The friction welding device for the new energy automobile structural part according to claim 1, characterized in that: go-between (3) are towards the concave structure of joint ring (5) the inboard of go-between (3) has a plurality of draw-in grooves (8) about go-between (3) central axis annular array, just joint ring (5) are gone up to have a plurality ofly and draw-in groove (8) assorted fixture block (9) about joint ring (5) central axis annular array.

3. The friction welding device for the new energy automobile structural part according to claim 2, characterized in that: the pushing component (6) comprises a push rod (601) sleeved on the connecting ring (3), the push rod (601) is driven by a linear driving mechanism to move along the axial direction of the transmission shaft (1), a pushing convex block (602) is arranged on one side, facing the connecting ring (3), of the push rod (601), a pushing groove (603) matched with the pushing convex block (602) and coaxially arranged with the connecting ring (3) is formed in the connecting ring (3), and the push rod (601) drives the connecting ring (3) to be connected with the clamping ring (5) through the embedding of the pushing convex block (602) and the pushing groove (603);

the width of the pushing groove (603) is larger than that of the pushing lug (602).

4. The friction welding device for the new energy automobile structural part according to claim 3, characterized in that: a friction cone (604) which is sleeved on the transmission shaft (1) and used for synchronizing the rotating speeds of the connecting ring (3) and the clamping ring (5) is arranged between the clamping ring (5) and the connecting ring (3), and the connecting ring (3) is excessively arranged at a position which is flush with the clamping ring (5) and is embedded through the friction cone (604).

5. The friction welding device for the new energy automobile structural part according to claim 4, characterized in that: the width of the connecting ring (3) is larger than the sum of the width of the clamping ring (5) and the width of the friction cone (604).