Automatic welding device for hard alloy stamping die production

Abstract

The invention relates to an automatic welding device for hard alloy stamping die production, which comprises a base, a first electric three-jaw chuck used for clamping a steel base is fixedly arranged on the top surface of the base, a supporting seat is arranged on one side of the base, a motor is fixedly arranged on the supporting seat, and a second electric three-jaw chuck is arranged on the other side of the base. A rotating frame is fixedly arranged at the output end of the motor, a punch placing assembly, a flux core brazing ring placing assembly and a heating assembly are arranged on the top of the rotating frame in the circumferential direction, and a flux core brazing ring can be automatically fed into the bottom of a blind hole and can be straightened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stamping die production, in particular to an automatic welding device for hard alloy stamping die production. BACKGROUND

[0002] In the manufacturing process of hard alloy stamping die, a combined die structure composed of hard alloy punch and steel base by brazing is often used, wherein the steel base is often designed as a rod-shaped part with a central blind hole, the hard alloy punch is inserted into the blind hole, and a small annular gap is left between the two for prepositioning of the drug core brazing ring, then after heating, the drug core brazing ring melts and fills the gap through capillary action to realize the fixation of the two, but in the existing brazing process of hard alloy and steel base, the drug core brazing ring is usually manually placed into the blind hole by the operator and adjusted in position by visual observation to ensure that the drug core brazing ring is coaxially centered at the bottom of the blind hole, then this method highly depends on experience and it is difficult to ensure the accurate positioning of the drug core brazing ring, which is prone to tilting problem, thereby affecting the uniformity of capillary filling after the melting of the drug core brazing ring, resulting in the generation of defective products. SUMMARY

[0003] (1) Technical problem to be solved The purpose of the present application is to overcome the shortcomings of the prior art, adapt to the needs of reality, and provide an automatic welding device for hard alloy stamping die production, which can automatically send the drug core brazing ring to the bottom of the blind hole and can adjust the drug core brazing ring, to solve the above technical problems.

[0004] (2) Technical scheme In order to achieve the purpose of the present application, the technical scheme adopted by the present application is: An automatic welding device for hard alloy stamping die production, comprising a base, a first electric three-jaw chuck for clamping a steel base is fixedly arranged on the top surface of the base, a support seat is arranged on one side of the base, an electric motor is fixedly arranged on the support seat, a rotating frame is fixedly arranged on the output end of the electric motor, a punch placing assembly, a drug core brazing ring placing assembly and a heating assembly are respectively arranged on the top of the rotating frame in the circumferential direction.

[0005] The medicine core brazing ring placing assembly comprises a first air cylinder fixedly arranged on the top of the rotating frame, a mounting frame fixedly arranged on the piston rod of the first air cylinder, a circular tube fixedly arranged on the bottom of the mounting frame, a plurality of grooves uniformly distributed on the circumferential wall of the circular tube in the circumferential direction, a support rod reciprocally arranged in the grooves, a working motor fixedly arranged in the middle of the mounting frame, an output end of the working motor rotatably penetrating through the side wall of the mounting frame and being provided with an extension assembly, the other end of the extension assembly being provided with a connecting rod, the non-end region of the connecting rod being provided with a conical surface, the diameter of the part above the conical surface being greater than the diameter of the part below the conical surface, and in the initial state, one end of the support rod in the circular tube abuts against the outer circumferential wall of the part above the conical surface.

[0006] The medicine core brazing ring placing assembly further comprises a semicylindrical block fixedly arranged on each support rod, the semicylindrical block being located in the circular tube and the arc surface of the semicylindrical block facing the connecting rod, a push rod fixedly arranged on the connecting rod, the push rod being located below the semicylindrical block in the initial state, and the push rod being located between two semicylindrical blocks when the connecting rod is pushed upward to the limit position.

[0007] The extension assembly comprises a square tube fixedly arranged on the connecting rod, a magnet fixedly arranged on the bottom of the square tube, an electromagnet arranged in the square tube, the square tube being reciprocally movable along the outer circumferential wall of the electromagnet, a return spring fixedly arranged between the electromagnet and the magnet, and the output end of the working motor being fixedly connected with the electromagnet.

[0008] A working spring is fixedly arranged between the inner circumferential wall of the circular tube and the support rod.

[0009] The punch placing assembly comprises a second air cylinder fixedly arranged on the top of the rotating frame, and a second electric three-jaw chuck fixedly arranged on the piston rod of the second air cylinder.

[0010] The heating assembly comprises a third air cylinder fixedly arranged on the top of the rotating rod, and an induction heating spiral coil fixedly arranged on the piston rod of the third air cylinder.

[0011] The clamping regions of the first electric three-jaw chuck are fixedly provided with heat insulation pads.

[0012] Beneficial effects: The arrangement of the plurality of support rods, the extension device, the semicylindrical blocks and the push rod can center and clamp the medicine core brazing ring before the medicine core brazing ring is placed into the steel base mounting hole, and the clamping of the medicine core brazing ring can be released after the medicine core brazing ring is placed into the steel base mounting hole, so that the medicine core brazing ring is automatically placed at the bottom of the steel base mounting hole. Meanwhile, after the core-brazing ring is placed at the bottom of the mounting hole, the outer circumferential wall of the core-brazing ring will be in contact with the inner circumferential wall of the steel base mounting hole during the process of placing the core-brazing ring into the steel base mounting hole, so that the core-brazing ring supported by the supporting rod will be slightly moved upward along the thickness direction of the supporting rod. After the slight upward movement, the supporting rod at the bottom of the mounting hole reaches the bottom of the mounting hole, and the core-brazing ring does not contact the bottom of the mounting hole. At this time, the supporting rod supporting the core-brazing ring is retracted into the groove, and the core-brazing ring is released from clamping and falls on the bottom of the mounting hole, which may be inclined on one side. Therefore, the plurality of supporting rods arranged along the outer circumferential wall of the circular tube can push each side of the inner circumferential wall of the core-brazing ring, so as to move one side of the core-brazing ring which is not in contact with the inner circumferential wall of the steel base mounting hole, so as to achieve the purpose of being in contact with the inner circumferential wall of the steel base mounting hole. At this time, the side of the core-brazing ring which is inclined against the inner circumferential wall of the steel base mounting hole will also be moved due to the movement of the other side of the core-brazing ring opposite to it, so that the side of the core-brazing ring is no longer blocked by the inner circumferential wall of the steel base mounting hole, and falls downward, thereby achieving the effect of being righted.

[0013] By rotating the push rod to sequentially cooperate with each supporting rod, the supporting rods are pushed out one by one to move the inner circumferential wall of the core-brazing ring. Compared with pushing out all the supporting rods at one time, the core-brazing ring can be better righted. (Because all the supporting rods are pushed out at one time, each side of the core-brazing ring will be supported by the supporting rods, which will cause the core-brazing ring to be supported and unable to be pushed, thereby failing to achieve the effect of being righted. Therefore, the supporting rods are arranged to be pushed out one by one by the push rod, which can well avoid this situation).

[0014] The brazing work of the hard alloy punch and the steel base can be automatically completed by the punch placing assembly, the core-brazing ring placing assembly and the heating assembly, so that the work efficiency can be improved compared with manual operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the automatic welding device for hard alloy stamping die production; Figure 2 It is an enlarged view of A in Figure 1 Figure 3 It is a schematic diagram of the three-dimensional structure of the automatic welding device for hard alloy stamping die production from another perspective; Figure 4 It is an enlarged view of B in Figure 3 Figure 5 It is a schematic diagram of the internal structure of the circular tube; ​​Figure 6 is Figure 5 is an enlarged view of C in Figure 7 is a bottom view of the round tube; Figure 8 is a bottom perspective view of the round tube; Figure 9 is a state diagram when the support rod is centered and clamps the flux-cored brazing ring; Figure 10 is a state diagram when the flux-cored brazing ring is placed into the steel base mounting hole and is tilted. DETAILED DESCRIPTION

[0016] The application is further described below in conjunction with the accompanying Figures 1-10 and examples: An automatic welding device for hard alloy stamping die production, comprising a base 1, a first electric three-jaw chuck 2 is fixedly arranged on the top surface of the base 1 for clamping a steel base, a support seat 200 is arranged on one side of the base 1, an electric motor 3 is fixedly arranged on the support seat 200, a rotating frame 4 is fixedly arranged on the output end of the electric motor 3, a punch placing assembly, a flux-cored brazing ring placing assembly, and a heating assembly are respectively arranged on the top of the rotating frame 4 in the circumferential direction.

[0017] The flux-cored brazing ring placing assembly comprises a first air cylinder 5 fixedly arranged on the top of the rotating frame 4, an installation frame 6 is fixedly arranged on the piston rod of the first air cylinder 5, a round tube 7 is fixedly arranged on the bottom of the installation frame 6, six grooves 8 are uniformly distributed on the outer peripheral wall of the round tube 7 in the circumferential direction, a support rod 10 that can reciprocate is arranged in the grooves 8, a working motor 11 is fixedly arranged in the middle of the installation frame 6, the output end of the working motor 11 is rotatably arranged through the side wall of the installation frame 6 and is provided with a telescopic assembly, a connecting rod 12 is arranged on the other end of the telescopic assembly, the non-end region of the connecting rod 12 has a conical surface 13, and the diameter of the upper part of the conical surface 13 is greater than the diameter of the lower part of the conical surface 13, and in the initial state, one end of the support rod 10 located in the round tube 7 abuts against the outer peripheral wall of the upper part of the conical surface 13 of the connecting rod 12.

[0018] The flux-cored brazing ring placing assembly further comprises a semicylindrical block 110 fixedly arranged on each support rod 10, the semicylindrical block 110 is located in the round tube 7, and the circular arc surface of the semicylindrical block 110 faces the connecting rod 12, a push rod 130 is fixedly arranged on the connecting rod 12, in the initial state, the push rod 130 is located below the semicylindrical block 110, and when the connecting rod 12 is pushed upward to the limit position, the push rod 130 is located between two semicylindrical blocks 110.

[0019] The telescopic assembly comprises a square tube 20 fixedly arranged on the connecting rod 12, a magnet 400 fixedly arranged at the bottom of the square tube 20, an electromagnet 21 arranged in the square tube 20, the square tube 20 being capable of reciprocating along the outer periphery of the electromagnet 21, a reset spring 22 fixedly arranged between the electromagnet 21 and the magnet 400, and the output end of the working motor 11 being fixedly connected with the electromagnet 21.

[0020] A working spring 40 is fixedly arranged between the inner periphery of the circular tube 7 and the supporting rod 10, and is used for resetting after losing the obstruction when the supporting rod 10 is located below the conical surface 13, so that the end of the supporting rod 10 located in the circular tube abuts against the outer periphery wall of the portion below the conical surface 13 of the connecting rod 12.

[0021] The punch placing assembly comprises a second air cylinder 50 fixedly arranged at the top of the rotating frame 4, and a second electric three-jaw chuck 51 fixedly arranged on the piston rod of the second air cylinder 50.

[0022] The heating assembly comprises a third air cylinder 60 fixedly arranged at the top of the rotating rod 4, and an inductive heating spiral coil 61 fixedly arranged on the piston rod of the third air cylinder 60.

[0023] The clamping areas of the first electric three-jaw chuck 2 are fixedly arranged with heat insulation pads, so that the first electric three-jaw chuck 2 is heat-insulated when the inductive heating spiral coil 61 heats the flux-cored brazing ring.

[0024] The first air cylinder 5, the second air cylinder 50 and the third air cylinder 60 are respectively fixedly arranged with positioning cameras, so that the first air cylinder 5 accurately reaches the middle of the mounting hole of the base block with the middle of the circular tube 7, the second air cylinder 50 accurately reaches the middle of the mounting hole of the base block with the middle of the second electric three-jaw chuck 51, and the third air cylinder 60 accurately reaches the middle of the mounting hole of the base block with the middle of the inductive heating spiral coil 61. The positioning cameras and the motor 3 are in contact through wireless signals, and the motor 3 is paused when it is detected that the middle of the circular tube 7, the middle of the second electric three-jaw chuck 51 or the middle of the inductive heating spiral coil 61 reaches the middle of the mounting hole of the base block.

[0025] The working principle of the present application comprises the following processes: The bottom of the steel base is placed on the first electric three-jaw chuck 2, the first electric three-jaw chuck 2 clamps the bottom of the steel base and centers the mounting hole on the steel base at the same time, the punch to be brazed is clamped by the second electric three-jaw chuck 51, and the punch is centered by the self-centering property of the second electric three-jaw chuck 51, and the flux-cored brazing ring is centered and clamped by the flux-cored brazing ring placing assembly, and the specific steps are as follows: The electromagnetic iron is started, the electromagnetic iron will attract the magnet to move upward, the magnet will take the connecting rod 12 to move upward, first let the support rod 10 in the one end in the round pipe 7 no longer resist the outer peripheral wall of the connecting rod above the conical surface 13 part, the support rod 10 will move to the direction close to the connecting rod 12, then the medicine core brazing ring is placed horizontally on the position of the support rod 10 in the one end outside the round pipe 7, then let the electromagnetic iron 21 power off, the connecting rod 12 will reset under the action of the reset spring 22, the outer peripheral wall of the connecting rod 12 above the conical surface 13 part will push the support rod 10 in the one end outside the round pipe 7 to move away from the connecting rod 12, so that the outermost end of the six support rods 10 is against the inner peripheral wall of the medicine core brazing ring to form a center clamping; Then start the motor 3, the motor 3 will drive the rotating frame 4 to rotate, the rotating frame 4 will take the medicine core brazing ring placement assembly to move close to the first electric three-jaw chuck 2, when the positioning camera on the first cylinder 5 detects that the middle part of the round pipe 7 is aligned with the middle part of the steel base mounting hole, the motor 3 will pause, the first cylinder 5 is started, the first cylinder 5 takes the installation frame 6 and the round pipe 7 to move down into the steel base mounting hole, when the round pipe 7 reaches the bottom of the steel base mounting hole, the electromagnetic iron 21 is powered on, the magnet will take the connecting rod 12 to move upward, so that the one end of the support rod 10 in the round pipe 7 changes from resisting the part above the conical surface 13 of the connecting rod 12 to resisting the part below the conical surface 13 of the connecting rod 12, because the diameter of the part below the conical surface 13 of the connecting rod 12 is smaller than that of the part above the conical surface 13, therefore the support rod 10 will move through the groove 8 to the direction close to the connecting rod 12, when the six support rods 10 move to the direction close to the connecting rod 12, the support rod 10 no longer resists the inner peripheral wall of the medicine core brazing ring, so as to realize the placement of the medicine core brazing ring at the bottom of the steel base mounting hole; After the medicine core brazing ring is placed, because the outer peripheral wall of the medicine core brazing ring will contact the inner peripheral wall of the steel base mounting hole during the process of placing the medicine core brazing ring in the steel base mounting hole, the medicine core brazing ring supported by the support rod 10 will move slightly upward along the thickness direction of the support rod 10, after the slight upward movement, the support rod 10 at the bottom of the mounting hole reaches the bottom of the mounting hole, the medicine core brazing ring does not contact the bottom of the mounting hole, when the support rod 10 supporting the medicine core brazing ring retracts, the medicine core brazing ring falls on the bottom of the mounting hole after being released from clamping, a certain side will be inclined, therefore, the alignment detection needs to be performed; The righting detection step is: since the connecting rod 12 moves upward, at this time the push rod 130 also moves upward to the space between the semicylindrical blocks 110, and then as long as the working motor 11 is started to drive the connecting rod 12 to rotate one circle, the connecting rod 12 rotates to drive the conical surface 13 to rotate, and the push rod 130 rotates to push the semicylindrical blocks 110 to move away from the connecting rod 12, the semicylindrical blocks 110 move together with the support rods 10, the support rods 10 move to abut against the inner circumferential wall of the steel base mounting hole to abut against the brazing ring, and the push rod 130 pushes the semicylindrical blocks 110 one by one to push the support rods 10 one by one to abut against the brazing ring, so that if one side of the brazing ring does not reach the bottom surface of the steel base mounting hole and is blocked by the inner circumferential wall of the steel base mounting hole to be inclined and abut against the inner circumferential wall of the steel base mounting hole, it means that one side of the outer circumferential wall of the brazing ring does not abut against the inner circumferential wall of the steel base mounting hole (as shown in Figure 10 FIG. 8, the left side of the brazing ring does not abut against the inner circumferential wall of the steel base mounting hole), the plurality of support rods 10 arranged along the outer circumferential wall of the circular tube are used to push the brazing ring to move, each side of the inner circumferential wall of the brazing ring is pushed, and then one side of the brazing ring that does not abut against the inner circumferential wall of the steel base mounting hole is moved to abut against the inner circumferential wall of the steel base mounting hole, at this time, the side of the brazing ring that is inclined and abutted against the inner circumferential wall of the steel base mounting hole is no longer blocked by the inner circumferential wall of the steel base mounting hole due to the movement of the other side of the brazing ring opposite to it, and falls down, thereby achieving the righting effect. The rotation of the push rod 130 is used to sequentially cooperate with each support rod 10, the support rods 10 are pushed out one by one, and the inner circumferential wall of the brazing ring is pushed to move, compared with pushing out all the support rods 10 at one time, the brazing ring can be better righted, because all the support rods 10 are pushed out at one time, each side of the brazing ring is supported by the support rods 10, and the brazing ring is entirely supported and cannot be pushed, thereby failing to achieve the righting effect.

[0026] After the brazing ring is righted, the first cylinder 5 is started to drive the circular tube 7 to move away from the mounting hole, then the motor 3 is started to drive the second cylinder 50 and the second electric three-jaw chuck 51 to move the punch towards the first electric three-jaw chuck 2, when the positioning camera detects that the middle part of the second electric three-jaw chuck 51 moves to align with the middle part of the steel base mounting hole, the movement is stopped, then the second cylinder 50 is started to drive the second electric three-jaw chuck 51 to move downwards, when the punch moves to the bottom of the mounting hole, the second electric three-jaw chuck 51 releases the punch, and then the second cylinder 50 drives the second electric three-jaw chuck 51 to reset upwards; When the punch is placed, the motor 3 continues to start to rotate, and the second cylinder 50 and the induction heating spiral coil 61 move towards the first motorized three-jaw chuck 2. When the positioning camera detects that the middle part of the induction heating spiral coil 61 is aligned with the middle part of the mounting hole, the motor 3 stops, and then the third cylinder 60 starts to move downwards with the induction heating spiral coil 61. The induction heating spiral coil 61 moves downwards along the cylindrical outer peripheral wall of the steel base, and stops moving when it reaches the same height as the bottom of the blind hole in the steel base. The outer peripheral wall of the steel base in this part is heated (i.e. the blind hole depth range is heated).

[0027] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to the process, article or equipment / device.

[0030] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

Claims

1. An automatic welding device for producing cemented carbide stamping dies, characterized in that: The device includes a base (1), on the top surface of which a first electric three-jaw chuck (2) for clamping a steel base is fixedly provided. A support base (200) is provided on one side of the base (1), and an electric motor (3) is fixedly provided on the support base (200). A rotating frame (4) is fixedly provided at the output end of the electric motor (3). A punch placement assembly, a flux-cored brazing ring placement assembly, and a heating assembly are respectively provided on the top of the rotating frame (4) along the circumferential direction.

2. The automatic welding device for producing cemented carbide stamping dies as described in claim 1, characterized in that: The flux-cored brazing ring placement assembly includes a first cylinder (5) fixedly mounted on the top of the rotating frame (4). A mounting frame (6) is fixedly mounted on the piston rod of the first cylinder (5). A circular tube (7) is fixedly mounted at the bottom of the mounting frame (6). Multiple grooves (8) are evenly distributed along the circumferential direction on the outer peripheral wall of the circular tube (7). A reciprocating support rod (10) is provided in the groove (8). A working motor (11) is fixedly mounted in the middle of the mounting frame (6). The output end of the motor (11) rotatably protrudes through the side wall of the mounting frame (6) and is provided with a telescopic component. The other end of the telescopic component is provided with a connecting rod (12). The non-end region of the connecting rod (12) has a conical surface (13), and the diameter of the portion above the conical surface (13) of the connecting rod (12) is larger than the diameter of the portion below the conical surface (13). In the initial state, one end of the support rod (10) located inside the circular tube (7) abuts against the outer peripheral wall of the portion above the conical surface (13) of the connecting rod (12).

3. The automatic welding device for producing cemented carbide stamping dies as described in claim 2, characterized in that: The flux-cored brazing ring placement assembly also includes a semi-cylindrical block (110) fixedly mounted on each support rod (10). The semi-cylindrical block (110) is located inside the circular tube (7), and the arc surface of the semi-cylindrical block (110) faces the connecting rod (12). A push rod (130) is fixedly mounted on the connecting rod (12). In the initial state, the push rod (130) is located below the semi-cylindrical block (110). When the connecting rod (12) is pushed upward to the limit position, the push rod (130) is located between two of the semi-cylindrical blocks (110).

4. The automatic welding device for producing cemented carbide stamping dies as described in claim 2, characterized in that: The telescopic assembly includes a square tube (20) fixedly mounted on a connecting rod (12). A magnet (400) is fixedly mounted at the bottom of the square tube (20). An electromagnet (21) is mounted inside the square tube (20). The square tube (20) can reciprocate along the outer periphery of the electromagnet (21). A return spring (22) is fixedly mounted between the electromagnet (21) and the magnet (400). The output end of the working motor (11) is fixedly connected to the electromagnet (21).

5. The automatic welding device for producing cemented carbide stamping dies as described in claim 2, characterized in that: A working spring (40) is fixedly installed between the inner circumferential wall of the circular tube (7) and the support rod (10).

6. The automatic welding device for producing cemented carbide stamping dies as described in claim 1, characterized in that: The punch placement assembly includes a second cylinder (50) fixedly mounted on the top of the rotating frame (4), and a second electric three-jaw chuck (51) is fixedly mounted on the piston rod of the second cylinder (50).

7. The automatic welding device for producing cemented carbide stamping dies as described in claim 1, characterized in that: The heating assembly includes a third cylinder (60) fixedly mounted on the top of the rotating rod (4), and an induction heating spiral coil (61) is fixedly mounted on the piston rod of the third cylinder (60).

8. The automatic welding device for producing cemented carbide stamping dies as described in claim 1, characterized in that: The clamping area of ​​the first electric three-jaw chuck (2) is fixedly equipped with heat insulation pads.

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