CN219254473U

CN219254473U - Chuck welding fork positioning and clamping tool of transmission shaft friction welding equipment

Info

Publication number: CN219254473U
Application number: CN202223086133.4U
Authority: CN
Inventors: 李虎; 金国军; 唐礼栋
Original assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Current assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-06-27
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a positioning and clamping tool for a chuck welding fork of a transmission shaft friction welding device, which mainly comprises a chuck body, clamping jaws and a part excircle clamping block which are fixedly connected in sequence; the claw is provided with a through hole, and a core rod anti-drop pin is arranged in the through hole and used for preventing the earhole core rod from dropping out; the center of the chuck is fixedly connected with a core rod positioning block for positioning a welding fork; the earhole core rod is inserted into the earhole of the welding fork. The positioning tool for the welding fork part is improved, so that the part can be completely clamped in the friction welding process, the phase control precision of the shaft tube fork assembly can be ensured, the fit clearance between the core rod and the lug hole is reduced, and the poor extrusion deformation of the lug hole of the part is eliminated. When the workpiece is clamped, the influence on the outer circle clamping area is eliminated by utilizing the change of the inclined plane contact position of the earhole core rod and the core rod positioning block, so that the workpiece always maintains enough clamping force in the welding process, and the phase can be controlled by the effective contact of the earhole core rod and the core rod positioning block.

Description

Chuck welding fork positioning and clamping tool of transmission shaft friction welding equipment

Technical Field

The utility model relates to the field of positioning tools, in particular to a positioning and clamping tool for a chuck welding fork of a transmission shaft friction welding device.

Background

Axle tube fork assembly: the transmission shaft assembly is a part of an automobile transmission shaft assembly, and is a product part formed by combining three parts of a welding fork, a shaft tube and a spline shaft in a welding mode. At present, when the foreign or domestic automobile rear-drive transmission shaft assembly is manufactured, the shaft tube fork assembly is processed by adopting friction welding equipment, and in the design and manufacture of the friction welding equipment, when a welding fork part is used as a rotary friction piece, the part is installed and fixed by adopting a two-claw or four-claw chuck structure, as shown in fig. 1-2, the clamping and positioning modes are as follows: the lug holes of the welding fork 5 penetrate through the lug hole core rods 3 to be positioned so as to control the phase of the assembly, the excircle of the welding fork 5 is clamped so as to prevent the workpiece from rotating relative to the clamp in the welding process, the lug hole core rods 3 are installed or penetrated on two symmetrical clamping jaws 2, and the lug hole core rods 3 and the excircle clamping blocks 4 of the part synchronously move along with the clamping jaws 2 during working. Because the welding fork 5 is in the machining manufacturing process, because of factors such as machining equipment, part material, hardness, fixed frock of machining and processing technological parameter influence, the cylindrical surface of two earholes of welding fork 5 and the centre gripping excircle of relative welding fork 5 have axiality, position degree waiting form deviation, when adopting earhole plug 3 and part excircle clamp splice 4 synchronous motion to press from both sides tightly, in order to avoid the frock to retrain and interfere and cause the part excircle to press from both sides incompletely tightly, work piece skidding causes quality and safety risk, influence the life scheduling problem of frock when friction welding, often design the diameter of earhole plug 3 to be less than welding fork 5 earhole diameter, this kind of design just causes the increase of the phase control degree of difficulty of shaft tube fork assembly friction welding, and to aluminium class welding fork part still can appear part earhole extrusion deformation, influence the assembly and the life of later stage universal joint. When the four-jaw chuck is used for fixing, a pair of clamping jaws are used for clamping and fixing the excircle of a welding fork part to prevent the workpiece from rotating relative to a clamp during friction welding, the pair of clamping jaws are used for driving a core rod to penetrate into an ear hole of the welding fork to control the phase of the part and prevent rotation, position deviation exists between the excircle and the ear hole due to the fact that coaxiality deviation exists between the two ear holes when the part is machined, when the four-jaw chuck is used for clamping, the two groups of clamping jaws can be in over-constraint with the welding fork part, or the problem that the excircle is not clamped and is welded to slip occurs, or the problem that the front surface of the ear hole is damaged by the core rod in a squeezing mode occurs.

Disclosure of Invention

According to the clamping fixture for the welding fork of the transmission shaft friction welding equipment, the defects in the prior art are overcome, the influence of deviation of the relative positions of the lug holes of the welding fork parts and the clamping outer circle is eliminated by improving the structure of the fixture, when the deviation exists, the welding fork moves through the unilateral adherence of the lug hole core rod on the core rod positioning block, so that the fixture can always keep full contact with the outer circle, the parts can be clamped completely and reliably, the phase position in the welding process can be guaranteed through the unilateral adherence of the lug hole core rod all the time, and the quality stability of friction welding products is improved.

The technical scheme adopted for solving the technical problems is as follows: the chuck welding fork positioning and clamping tool of the transmission shaft friction welding equipment mainly comprises a chuck body, clamping jaws and a part excircle clamping block; the chuck body, the clamping jaw and the part outer circle clamping block are sequentially and fixedly connected; the claw is provided with a through hole, and a core rod anti-drop pin is arranged in the through hole and used for preventing the earhole core rod from dropping out; the center of the chuck is fixedly connected with a core rod positioning block for positioning a welding fork; the earhole core rod is inserted into the earhole of the welding fork and is close to the contact surface of the core rod positioning block.

Preferably, the outer wall of the earhole core rod is provided with an anti-falling hole, and the core rod anti-falling pin is inserted into the anti-falling hole to prevent the earhole core rod from falling out.

Preferably, a core rod pushing rod A and a core rod pushing rod B are respectively arranged on two sides of the chuck body, the core rod pushing rod A and the core rod pushing rod B are connected with an air cylinder, and the air cylinder drives the core rod pushing rod A and the core rod pushing rod B to move so as to push and push the earhole core rod out of the earhole.

Preferably, a connecting hole is formed in the center of the end face of the earhole core rod, and the core rod pushing rod is inserted into the connecting hole to drive the earhole core rod to move.

Preferably, the mandrel positioning block is V-shaped.

Preferably, the anti-falling hole is a through hole.

The beneficial effects of the utility model are as follows: the positioning tool for the welding fork part is improved, so that the part can be completely clamped in the friction welding process, the phase control precision of the shaft tube fork assembly can be ensured, the fit clearance between the core rod and the lug hole is reduced, and the poor extrusion deformation of the lug hole of the part is eliminated. When the workpiece is clamped, the influence of over-constraint on the outer circle clamping area is eliminated by utilizing the change of the inclined plane contact position of the earhole core rod and the core rod positioning block, so that the workpiece always maintains enough clamping force in the welding process, and the phase can be controlled by the effective contact of the earhole core rod and the core rod positioning block.

Drawings

Fig. 1 is a schematic diagram 1 of a prior art structure.

Fig. 2 is a schematic diagram of a prior art structure 2.

Fig. 3 is a schematic structural view 1 of the present utility model.

Fig. 4 is a schematic structural view 2 of the present utility model.

FIG. 5 is a schematic view of the structure of the earhole core rod of the present utility model.

Fig. 6 is a schematic view of the mandrel ejector rod a of the present utility model pushing the earhole mandrel into the earhole.

FIG. 7 is a schematic view of the positioning tool of the present utility model clamping a welding fork.

Fig. 8 is a schematic view of the mandrel ejector rod B of the present utility model ejecting the earhole mandrel out of the earhole.

FIG. 9 is a schematic illustration of the change in position of the earhole mandrel of the present utility model.

Reference numerals illustrate: chuck body 1, jack catch 2, earhole plug 3, part excircle clamp splice 4, welding fork 5, plug anticreep round pin 6, plug locating piece 7, plug ejector rod A8, plug ejector rod B9, earhole 10, anticreep hole 11, connecting hole 12.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

examples: as shown in fig. 3-5, the chuck welding fork positioning and clamping tool of the transmission shaft friction welding equipment is formed by sequentially and fixedly connecting a chuck body 1, a claw 2 and a part excircle clamping block 4; the claw 2 is provided with a through hole, a core rod anti-falling pin 6 is arranged in the through hole, the claw 2 is used for clamping the welding fork 5, the outer wall of the earhole core rod 3 is provided with an anti-falling hole 11, and the core rod anti-falling pin 6 is inserted into the anti-falling hole 11 to prevent the earhole core rod 3 from falling out; the center of the chuck is fixedly connected with a V-shaped core rod positioning block 7 for positioning the welding fork 5; the earhole core rod 3 is inserted into the earhole 10 of the welding fork 5 and is close to the core rod positioning block 7, the dimension of the earhole core rod 3 is the designed lower difference of the earhole 10 minus coaxiality, the fit clearance between the earhole core rod 3 and the earhole 10 in the prior art is reduced, and the adverse phenomenon of extrusion deformation of the earhole 10 is eliminated. The connecting hole 12 has been seted up at earhole plug 3 terminal surface center, chuck body 1 both sides are equipped with plug ejector rod A8 and plug ejector rod B9 respectively, and plug ejector rod A8 is located chuck body 1 below, and plug ejector rod B9 is located chuck body 1 top, and plug ejector rod A8 and plug ejector rod B9 are connected with the cylinder, and plug ejector rod A8 inserts connecting hole 12, and the cylinder drives plug ejector rod A8 and plug ejector rod B9 motion and advances earhole plug 3 from earhole 10 and ejecting, the cylinder is installed on the headstock along with the synchronous removal of main shaft in order to guarantee earhole plug 3 can be aligned with earhole 10 all the time.

The working process comprises the following steps: as shown in fig. 5-9, in the initial stop state of the chuck body 1, the mandrel pushing rod a is located below the chuck body 1, the mandrel pushing rod B9 is located above the chuck body 1, and the earhole mandrel 3 is connected with the mandrel pushing rod A8 through the connecting hole 12; firstly, a welding fork 5 is placed between two clamping jaws 2 of a chuck body 1 and is initially positioned, then a cylinder on a spindle box drives a mandrel pushing rod A8 to move upwards and push an earhole mandrel 3 into an earhole 10, the clamping jaws 2 clamp the welding fork 5, a part excircle clamping block 4 clamps the excircle of the welding fork 5, a mandrel anti-drop pin 6 is inserted into an anti-drop hole 11 on the earhole mandrel 3 along with clamping of the clamping jaws, the earhole mandrel 3 is pressed close to a mandrel positioning block 7, the cylinder drives the mandrel pushing rod A8 to retract, the earhole mandrel 3 is left in the earhole 10, and a part at the other end of the inserted shaft tube starts a welding procedure.

The chuck body 1 is driven by the main shaft to move, at the moment, the claw 2 does not clamp the outer circle of the welding fork 5 completely, the welding fork 5 pushes up in advance to enable the earhole core rod 3 in the earhole 9 to be in contact with the core rod positioning block 7, the contact surface of the earhole core rod 3 and the core rod positioning block 7 is in single-sided fit (as in the position A in fig. 9) due to the deviation of the position degree of the part, the claw 2 is pressed and clamped for the second time, when a workpiece is clamped, the influence on the outer circle clamping area is eliminated by utilizing the change of the inclined surface contact position of the earhole core rod 3 and the core rod positioning block 7, at the moment, the outer circle of the welding fork reaches a completely clamped state (as in the position B in fig. 9), so that the workpiece always keeps enough clamping force in the welding process, the phase position can be controlled through the effective contact between the earhole core rod 3 and the core rod positioning block 7, and at the moment, the welding fork 5 can be positioned firmly.

When the friction welding and forge-welding processes are finished, the controller controls the main shaft to stop the welding fork 5 at the initial position, the cylinder drives the mandrel pushing rod A8 to move upwards, the mandrel pushing rod B9 moves downwards, when the mandrel pushing rod A8 and the earhole mandrel 3 reach the coaxial position, the connecting hole 12 on the earhole mandrel 3 is aligned with the mandrel pushing rod A8, the mandrel pushing rod B9 ejects the earhole mandrel 3 from the earhole 10, the mandrel pushing rod A8 is inserted into the connecting hole 12 again, at the moment, the mandrel pushing rod A8 drives the earhole mandrel 3 to move downwards to return to the initial position again, the mandrel pushing rod B9 also moves upwards to return to the initial position, then the main shaft drives the chuck body 1 to retract, and the shaft tube fork assembly finishes welding.

In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A transmission shaft friction welding equipment chuck welding fork location centre gripping frock, its characterized in that: the tool mainly comprises a chuck body (1), clamping jaws (2) and a part excircle clamping block (4); the chuck body (1), the clamping jaw (2) and the part outer circle clamping block (4) are fixedly connected in sequence; the claw (2) is provided with a through hole, and a core rod anti-falling pin (6) is arranged in the through hole and used for preventing the earhole core rod (3) from falling off; the center of the chuck is fixedly connected with a core rod positioning block (7) for positioning the welding fork (5); the earhole core rod (3) is inserted into the earhole (10) of the welding fork (5) and is close to the contact surface of the core rod positioning block (7).

2. The transmission shaft friction welding equipment chuck welding fork positioning and clamping tool according to claim 1, wherein: the outer wall of the earhole core rod (3) is provided with an anti-falling hole (11), and the core rod anti-falling pin (6) is inserted into the anti-falling hole (11) to prevent the earhole core rod (3) from falling out.

3. The transmission shaft friction welding equipment chuck welding fork positioning and clamping tool according to claim 1, wherein: the chuck is characterized in that a core rod pushing rod A (8) and a core rod pushing rod B (9) are respectively arranged on two sides of the chuck body (1), the core rod pushing rod A (8) and the core rod pushing rod B (9) are connected with an air cylinder, and the air cylinder drives the core rod pushing rod A (8) and the core rod pushing rod B (9) to move so as to push and push the earhole core rod (3) out of the earhole (10).

4. The transmission shaft friction welding equipment chuck welding fork positioning and clamping tool according to claim 2, wherein: the center of the end face of the earhole core rod (3) is provided with a connecting hole (12), and a core rod pushing rod A (8) is inserted into the connecting hole (12) to drive the earhole core rod (3) to move.

5. The transmission shaft friction welding equipment chuck welding fork positioning and clamping tool according to claim 1, wherein: the core rod positioning block (7) is V-shaped.

6. The transmission shaft friction welding equipment chuck welding fork positioning and clamping tool according to claim 2, wherein: the anti-falling hole (11) is a through hole.