Friction welding clamp for machine shell

Abstract

The machine shell friction welding clamp comprises a rectangular base table, a plurality of pressing tools are arranged on the two sides of the rectangular base table in the length direction, and the top wall of the rectangular base table is used for containing a machine shell. Firstly, a to-be-welded machine shell is placed on the top wall of a rectangular base table, and it is ensured that the position of the machine shell is aligned with a preset welding track; then, a transmission mechanism of the pressing tool is started, the transmission mechanism drives the L-shaped clamping arm to rotate to the position over the rectangular base table from one side of the rectangular base table, meanwhile, the descending action is completed, the tail end of the clamping arm is precisely connected with the top face of the machine shell in a pressing mode, stable fixing in the length direction is achieved, and when a welding stage is started, when a static shoulder shaft of welding equipment needs to be fed in the axial direction of the machine shell, welding is completed; and the transmission mechanism adjacent to the static shoulder shaft is started again to drive the L-shaped clamping arm to rise to be separated from the top surface of the machine shell and then rotate to one side of the rectangular base station, so that the movement track range of the static shoulder shaft is thoroughly moved out, and mechanical interference is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fixture, specifically relates to a casing friction welding fixture. BACKGROUND

[0002] In the friction welding process, the clamping of casing type workpieces needs to rely on special fixtures for fixation. Although the clamping arms of traditional fixtures can leave out the welding operation space through opening and closing actions, the arm bodies still extend to the space above or on the side of the workpieces in the open state, such as the motor casing body fixture in the patent publication No. CN222327828U - Chinese utility model patent. When the static shoulder shaft of the welding equipment feeds along the axial direction of the casing, the overhanging clamping arms will directly intrude into the theoretical movement track of the static shoulder shaft, forcing the welding path to deviate. Such mechanical interference not only reduces the welding positioning accuracy, but also leads to a decrease in production efficiency due to frequent start-stop adjustments. Therefore, a fixture structure is developed, which can completely remove the clamping arms from the welding interference area during the welding stage. SUMMARY

[0003] The main purpose of the utility model is to provide a casing friction welding fixture to solve the problem that the existing motor casing body fixture has when the static shoulder shaft of the welding equipment feeds along the axial direction of the casing, the overhanging clamping arms will directly intrude into the theoretical movement track of the static shoulder shaft, forcing the welding path to deviate or needing to plan an additional avoidance path through the device program.

[0004] In order to achieve the above purpose, the utility model provides a casing friction welding fixture, which comprises a rectangular base, a plurality of pressing tools are arranged on both sides of the length direction of the rectangular base, and the top wall is used for placing the casing;

[0005] The pressing tool comprises a support box body and an L-shaped clamping arm, the bottom end of the support box body is fixedly connected with the rectangular base, a vertical hole is formed in the top end, one end of the L-shaped clamping arm penetrates into the vertical hole and is connected with a transmission mechanism for driving the lifting or turning of the L-shaped clamping arm;

[0006] The end of the L-shaped clamping arm away from the support box body can be located directly above or on one side of the rectangular base through the transmission mechanism.

[0007] One preferred scheme is that the transmission mechanism comprises a helical gear, a helical rack and a guide shaft;

[0008] The L-shaped clamping arm comprises a vertical rod and a pressing arm, the top end of the vertical rod is fixedly connected with one end of the pressing arm, and the other end of the pressing arm can press the casing;

[0009] The bottom end of the vertical rod penetrates into the vertical hole and is fixedly connected with the helical gear, and an L-shaped groove is formed in the ring wall;

[0010] The guide shaft is inserted into the L-shaped slot and fixed on the support box, the support box is provided with a horizontal hole in the horizontal direction, one end of the helical gear rack is inserted into the horizontal hole and engaged with the helical gear, and the other end is connected with a driving member for driving the helical gear rack to move along the horizontal hole.

[0011] In one preferred embodiment, the driving member comprises a first cylinder and a truss, the truss is fixedly connected with the support box, the cylinder base of the first cylinder is fixedly connected with the truss, and the piston rod is fixedly connected with one end of the helical gear rack.

[0012] In one preferred embodiment, the pressing arm is vertically and fixedly connected with a connecting rod at the end away from the vertical rod, and the connecting rod is coaxially connected with the flexible pad at the end away from the pressing arm.

[0013] In one preferred embodiment, the flexible pad is made of rubber.

[0014] In one preferred embodiment, a plurality of abutting mechanisms are arranged on both sides of the rectangular base in the width direction.

[0015] Each abutting mechanism comprises an abutting roller and a driving member.

[0016] The side walls of the rectangular base in the width direction are provided with a plurality of accommodating grooves in the length direction, each accommodating groove is slidably provided with an abutting roller, one end of the abutting roller is connected with a driving member for driving the abutting roller to slide along the accommodating groove, and the other end is abutted with the cabinet.

[0017] In one preferred embodiment, the driving member is a second cylinder, the cylinder base of the second cylinder is fixedly connected with the rectangular base, and the piston rod is coaxially connected with the abutting roller.

[0018] In one preferred embodiment, the rectangular base comprises a rectangular frame, a bottom plate and a top plate are respectively welded at the top end and the bottom end of the rectangular frame, and the top plate is used for placing the cabinet.

[0019] The above-mentioned scheme has the following beneficial effects:

[0020] First, the shell to be welded is placed on the top wall of the rectangular base, ensuring that the shell position is aligned with the preset welding trajectory. Then, the transmission mechanism of the pressing tool is started, which drives the L-shaped clamping arm to rotate from one side of the rectangular base to directly above, while completing the lowering action, so that the clamping arm end accurately presses the top surface of the shell, realizing stable fixation in the length direction. When the static shoulder shaft of the welding equipment needs to feed along the axial direction of the shell, the transmission mechanism of the static shoulder shaft adjacent to it is started again, which first drives the L-shaped clamping arm to rise and separate from the top surface of the shell, and then rotates to one side of the rectangular base, completely moving out of the movement trajectory range of the static shoulder shaft to avoid mechanical interference. The abutting mechanism can remain in the abutting state or be withdrawn synchronously according to the needs, ensuring that the welding area is completely open and meeting the requirements of friction welding for operation space. After welding is completed, the transmission mechanism drives the L-shaped clamping arm to reverse action, first rotating from one side of the base to directly above the shell, then descending and resetting and re-pressing the shell, and the static shoulder shaft continues to move forward for welding. When the next adjacent abutting mechanism repeats the above action. Through the lifting and turning composite motion of the transmission mechanism, efficient switching of clamping and fixation and welding avoidance is realized, which not only ensures the stability of shell clamping, but also eliminates the interference to the welding path. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.

[0022] Figure 1 It is a three-dimensional structure schematic diagram of the shell friction welding clamp of the utility model;

[0023] Figure 2 It is a three-dimensional structure schematic diagram of the pressing tool of the shell friction welding clamp of the utility model;

[0024] Figure 3 It is a ring wall structure schematic diagram of the pressing tool of the shell friction welding clamp of the utility model without support box body;

[0025] Figure 4 It is a three-dimensional structure schematic diagram of the pressing tool of the shell friction welding clamp of the utility model.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, rectangular base; 11, containing groove; 12, rectangular frame body; 13, bottom plate; 14, top plate; 2, pressing tool; 21, support box body; 210, vertical hole; 211, horizontal hole; 212, connecting rod; 213, flexible pad; 22, L-shaped clamping arm; 220, vertical rod; 221, pressing arm; 2201, L-shaped groove; 23, transmission mechanism; 230, helical gear; 231, helical rack; 232, guide shaft; 24, driving part; 241, first cylinder; 242, truss; 3, abutting mechanism; 31, abutting roller; 32, driving part. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Example:

[0030] like Figures 1-4 As shown, this embodiment provides a friction welding fixture for a housing, including a rectangular base 1. Multiple pressing fixtures 2 are arranged on both sides of the rectangular base 1 along its length. The rectangular base 1 includes a rectangular frame 12, with a bottom plate 13 and a top plate 14 welded to its top and bottom ends respectively. The top plate 14 is used to place the housing (not shown). Figure 2 As shown, the pressing fixture 2 includes a support box 21 and an L-shaped clamping arm 22. The bottom end of the support box 21 is fixedly connected to the rectangular base 1, and a vertical hole 210 is opened at the top end of the support box 21. One end of the L-shaped clamping arm 22 passes through the vertical hole 210 and is connected to a transmission mechanism 23 for driving its lifting or turning. The transmission mechanism 23 includes a helical gear 230, a helical rack 231, and a guide shaft 232. The L-shaped clamping arm 22 includes a vertical rod 220 and a pressing arm 221. The top end of the vertical rod 220 is fixedly connected to one end of the pressing arm 221, and the other end of the pressing arm 221 can press the machine housing. The bottom end of the vertical rod 220 passes through the vertical hole 210 and is fitted with a helical gear 230. Figure 4 As shown, an L-shaped groove 2201 is formed in the annular wall of the vertical rod 220. A guide shaft 232 passes through the support housing 21 and is inserted into the L-shaped groove 2201, and is fixed to the support housing 21. A horizontal hole 211 is formed in the support housing 21 along the horizontal direction. One end of the helical rack 231 passes through the horizontal hole 211 and meshes with the helical gear 230 (it should be noted that the helical gear 230 is elongated, which facilitates the lifting and lowering of the L-shaped clamping arm 22). The other end of the helical rack 231 is connected to a drive component 24 for moving it along the horizontal hole 211. Figure 2 As shown, the drive unit 24 includes a first cylinder 241 and a truss 242. The truss 242 is fixedly connected to the support box 21. The cylinder seat of the first cylinder 241 is fixedly connected to the truss 242, and the piston rod is fixedly connected to one end of the helical rack 231.

[0031] The piston rod of the first cylinder 241 extends horizontally to drive the helical rack 231 to move along the horizontal hole 211 of the support box 21. Since the helical rack 231 is engaged with the helical gear 230 fixed to the bottom end of the vertical rod 220, the horizontal movement of the helical rack 231 is converted into the rotary movement of the helical gear 230. At this time, the L-shaped groove 2201 of the ring wall of the vertical rod 220 cooperates with the guide shaft 232 on the support box 21. The guide shaft 232 first slides in the vertical section of the L-shaped groove 2201, so that the vertical rod 220 rises while rotating with the helical gear 230. When the pressing arm 221 rotates to the top of the machine shell, the guide shaft 232 enters the horizontal section of the L-shaped groove 2201, and the vertical rod 220 stops rotating and starts descending, finally the pressing arm 221 is precisely pressed on the top surface of the machine shell away from the end of the vertical rod 220, realizing stable fixation in the length direction. When the static shoulder shaft of the welding equipment needs to feed along the axial direction of the machine shell, the piston rod of the first cylinder 241 retracts to drive the helical rack 231 to move reversely, and the helical gear 230 rotates reversely. The guide shaft 232 first slides in the horizontal section of the L-shaped groove 2201 to drive the vertical rod 220 to rise, so that the pressing arm 221 is separated from the top surface of the machine shell, and then the guide shaft 232 enters the vertical section of the L-shaped groove 2201, and the vertical rod 220 rotates to one side of the rectangular base 1 with the helical gear 230, so that the pressing arm 221 is completely moved out of the movement track range of the static shoulder shaft to avoid interference. At this time, the abutting mechanism 3 can be kept abutting or retracted according to the requirement to ensure that the welding area is open. The end of the L-shaped clamping arm 22 away from the support box 21 can be located above or on one side of the rectangular base 1 through the transmission mechanism 23.

[0032] Firstly, the machine shell to be welded is placed on the top wall of the rectangular base 1 to ensure that the position of the machine shell is aligned with the preset welding track. Then, the transmission mechanism 23 of the pressing tool 2 is started, which drives the L-shaped clamping arm 22 to rotate from one side of the rectangular base 1 to the top, and at the same time, the L-shaped clamping arm 22 is lowered to press the end of the L-shaped clamping arm 22 on the top surface of the machine shell to realize stable fixation in the length direction. When the static shoulder shaft of the welding equipment needs to feed along the axial direction of the machine shell, the transmission mechanism 23 of the static shoulder shaft adjacent to the static shoulder shaft is started again to drive the L-shaped clamping arm 22 to rise and separate from the top surface of the machine shell, and then rotate to one side of the rectangular base 1 to completely move out of the movement track range of the static shoulder shaft to avoid mechanical interference. The abutting mechanism 3 can be kept abutting or retracted according to the requirement to ensure that the welding area is completely open to meet the requirement of the friction welding on the operation space. After welding, the transmission mechanism 23 drives the L-shaped clamping arm 22 to move reversely, which rotates from one side of the rectangular base 1 to the top of the machine shell, and then is lowered to reset and press the machine shell again. The static shoulder shaft continues to move forward to weld, and the above-mentioned action is repeated when the next adjacent abutting mechanism 3. The whole process realizes efficient switching of clamping and fixation and welding avoidance through the lifting and turning composite movement of the transmission mechanism 23, which not only ensures the stability of the clamping of the machine shell, but also eliminates the interference on the welding path.

[0033] The pressing arm 221 is vertically fixed with the connecting rod 212 at one end away from the vertical rod 220, and the connecting rod 212 is coaxially connected with the flexible pad 213 at one end away from the pressing arm 221. The flexible pad 213 is made of rubber material. The design of the flexible pad 213 helps to avoid over-pressing and damage to the cabinet. A plurality of abutting mechanisms 3 are arranged on both sides of the rectangular base 1 in the width direction. Each abutting mechanism 3 comprises an abutting roller 31 and a driving member 32. A plurality of accommodating grooves 11 are formed in the length direction of the side walls of the rectangular base 1 in the width direction, and the abutting roller 31 is slidably arranged in each accommodating groove 11. One end of the abutting roller 31 is connected with the driving member 32 for driving the abutting roller 31 to slide along the accommodating groove 11, and the other end abuts against the cabinet. The driving member 32 is a second air cylinder, the cylinder base of the second air cylinder is fixedly connected with the rectangular base 1, and the piston rod is coaxially connected with the abutting roller 31. First, the cabinet to be welded is placed on the top wall of the rectangular base 1 to ensure that it is aligned with the preset welding track. The abutting mechanism 3 is started, the piston rod of the second air cylinder is extended, the abutting roller 31 is driven to slide along the accommodating groove 11 of the side walls of the rectangular base 1 in the width direction, until the end of the abutting roller 31 away from the second air cylinder abuts against the side wall of the cabinet, and the cabinet is positioned from the width direction, forming a full-range stable clamping.

[0034] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A housing friction welding fixture comprising a rectangular base, characterized in that, The rectangular base is provided with a plurality of pressing tools on both sides in the length direction, and the top wall is used for placing the shell; The pressing tool comprises a support box and an L-shaped clamping arm, the bottom end of the support box is fixedly connected with the rectangular base, and the top end is provided with a vertical hole, one end of the L-shaped clamping arm penetrates into the vertical hole and is connected with a transmission mechanism for driving the L-shaped clamping arm to lift or turn; The end of the L-shaped clamping arm away from the support box can be located above or on one side of the rectangular base through the transmission mechanism.

2. The housing friction welding fixture of claim 1, wherein, The transmission mechanism comprises a helical gear, a helical rack and a guide shaft; The L-shaped clamping arm comprises a vertical rod and a pressing arm, the top end of the vertical rod is fixedly connected with one end of the pressing arm, and the other end of the pressing arm can press the shell; The bottom end of the vertical rod penetrates into the vertical hole and is sleeved with the helical gear, and an L-shaped groove is formed in the ring wall; The horizontally arranged guide shaft is inserted into the L-shaped groove through the support box and is fixed on the support box, the support box is provided with a horizontal hole in the horizontal direction, one end of the helical rack penetrates into the horizontal hole and is engaged with the helical gear, and the other end is connected with a driving member for driving the helical rack to move along the horizontal hole.

3. The housing friction welding fixture of claim 2, wherein, The driving member comprises a first cylinder and a truss, the truss is fixedly connected with the support box, the cylinder base of the first cylinder is fixedly connected with the truss, and the piston rod is fixedly connected with one end of the helical rack.

4. The housing friction welding fixture of claim 2, wherein, The end of the pressing arm away from the vertical rod is vertically fixedly connected with a connecting rod, and the end of the connecting rod away from the pressing arm is coaxially connected with a flexible pad.

5. The housing friction welding fixture of claim 4, wherein, The flexible pad is made of rubber material.

6. The housing friction welding fixture of any one of claims 1 to 5, wherein, A plurality of abutting mechanisms are arranged on both sides of the rectangular base in the width direction; The side walls of the rectangular base in the width direction are provided with a plurality of accommodating grooves in the length direction, each abutting mechanism comprises an abutting roller and a driving member; Each abutting roller is slidably arranged in the accommodating groove, one end of the abutting roller is connected with the driving member for driving the abutting roller to slide along the accommodating groove, and the other end abuts against the shell.

7. The housing friction welding fixture of claim 6, wherein, The driving member is a second cylinder, the cylinder base of the second cylinder is fixedly connected with the rectangular base, and the piston rod is coaxially connected with the abutting roller.

8. The housing friction welding fixture of claim 1, wherein, The rectangular base comprises a rectangular frame, a bottom plate and a top plate are respectively welded at the top end and the bottom end of the rectangular frame, and the top plate is used for placing the shell.

Images