CN214236605U - Flash welding weld joint finishing device and flash welding machine - Google Patents

Abstract

The utility model discloses a flash welding seam polishing device and flash welding machine, device include work piece fixture and annular polishing scraper, and work piece fixture sets up relatively fixedly, and annular polishing scraper fixed connection is on the blade holder, the blade holder can for work piece fixture longitudinal movement, the blade holder is connected with blade holder driving cylinder. The flash welding machine comprises a welding unit formed by a flash welding machine and a welding line finishing unit formed by the flash welding line finishing device, the flash welding machine is fixedly arranged, and the flash welding line finishing device is arranged in a relatively movable mode. The beneficial effects of the utility model are that, the polishing device can replace the artifical work of polishing the welding seam, eliminates the potential safety hazard, effectively improves polishing efficiency and welding seam polishing treatment quality, and applicable in the shaft-like or tubular structure flash of light butt welding product of slim type. The flash welding machine organically combines welding and welding seam finishing treatment, has the same beneficial effect as a welding seam finishing device, and can avoid a welding space.

Description

Flash welding weld joint finishing device and flash welding machine

Technical Field

The utility model relates to a welding aftertreatment technique, especially a flash welding seam polishing device and flash welding machine.

Background

Flash welding is a resistance welding method in which when an electric current is passed through the contact surfaces of two butted workpieces, the resistance of the fine contact points and the arc of the contact surfaces thereof generate heat to heat the butted surfaces, and after an appropriate time, pressure is applied to the joint to firmly bond the entire regions of the two butted surfaces at the same time. The range of the heat affected zone of flash welding is extremely small, and because the surface oxide and other impurities are removed as spark of four splashes, the surface oxide and other impurities are not mixed into the welding seam, and the reliability of the welding seam is high. The flash welding comprises two processes of flashing and upsetting, and the quality of a welding seam is ensured by flashing. The upsetting process is a process of applying upsetting pressure to extrude out all the molten metal on the joint surface and firmly forging the two workpieces together when a small section of the part of the two workpieces extending from the electrode reaches a temperature with good plasticity. As the molten metal is extruded during the upset forging, weld bead protrusions are formed that protrude from the outer surface of the workpiece. Therefore, in order to ensure that the surface of the workpiece is smooth and flat, the projection part larger than the welding seam must be removed after welding. In the welding production of the grid type arch centering, namely the flower arch centering, in order to meet the arc length specification of the arch centering and fully utilize the cost control requirement of raw materials, the threaded steel bars serving as main ribs are generally required to be subjected to butt welding, and the welding seams are subjected to finishing treatment after welding, so that the outer diameter of the welding seams is kept consistent with the outer diameter of the threaded steel bars, and the subsequent welding feeding conveying of the arch centering is facilitated. However, in the prior art, equipment or a device for performing finishing treatment on the flash welding circular weld seam is lacked, so that the flash welding circular weld seam can only adopt a treatment mode of manually polishing by an electric tool, and the problems of potential safety hazards and low production efficiency exist.

Disclosure of Invention

The utility model discloses a first purpose just can only adopt the not enough of artifical polishing to flash welded circular weld in current, provides a flash welding seam finishing device, and the device will be relative to a welding longitudinal movement through the annular scraper by hydraulic drive removal to adopt the cutting mode to stick out the part of a product through flash welded circular weld and get rid of in the body, thereby realize the reshaping welding seam finishing purpose of butt joint welding. The second purpose of the utility model is to provide a flash of light butt welder with aforementioned device to form the flash welding combination equipment that has the welding seam finishing and handle, be convenient for provide the flash welding product of welding seam finishing.

In order to achieve the first objective, the present invention adopts the following technical solution.

The utility model provides a flash welding seam burnishing device, includes work piece fixture and annular burnishing scraper, and work piece fixture is relatively fixed ground and sets up, and annular burnishing scraper fixed connection is on the blade holder, the blade holder can for work piece fixture longitudinal movement, the blade holder is connected with blade holder actuating cylinder.

According to the device adopting the technical scheme, the workpiece clamping mechanism is used for clamping and fixing the welded flash butt welding workpiece, and the part of the flash butt welding workpiece, which is suspended out of the clamping section, penetrates through the inner hole of the annular finishing scraper. Because the annular finishing scraper is fixedly connected with the cutter holder, the cutter holder drives the oil cylinder to drive the cutter holder to move, and simultaneously, the annular finishing scraper moves synchronously along with the cutter holder, and in the process that the annular finishing scraper moves from one side to the other side of a welding seam on a flash butt welding workpiece, the annular finishing scraper cuts off a welding seam protruding part larger than the inner hole part of the scraper, so that the purpose of finishing and processing the welding seam is achieved. Obviously, when the annular smoothing scraper is set to fit the cross-sectional dimension of the welded part, the cross-section of the welded part can be kept consistent with that of the workpiece. Compared with the prior art, this device fungible manual work adopts the work of electronic grinding tool polishing welding seam, eliminates electronic grinding tool because of the emery wheel bursts, skids or electric shock etc. a great deal of factor leads to the potential safety hazard, effectively improves polishing efficiency and welding seam finishing treatment quality, and applicable in the rod-like or tubular structure flash of slender type butt welding product, like circular billet, band iron, pipe, rectangular tube class extension member. When the scraper is used for extension components with different section shapes, the section of an inner hole of the annular finishing scraper is only required to be made into a structure matched with the section shape and the size of a product. The workpiece clamping mechanisms can be arranged in one or two ways, and when the workpiece clamping mechanisms are arranged in one way, the workpiece clamping mechanisms can be arranged in front of the finishing stroke direction of the annular finishing scraper or in the finishing stroke direction; when the polishing scraper is arranged at the front part, the polishing scraper applies pressure to the welding seam during polishing, and when the polishing scraper is arranged at the rear part, the polishing scraper applies tension to the welding seam during polishing. When the welding section is small, in order to ensure that the welding strength of the welding seam is not weakened due to the stretching of finishing processing, the welding section is usually arranged in the front, on the contrary, when the welding section is large, the influence factor of the finishing stretching on the welding seam strength is small, and the welding section can also be arranged in the rear according to the structural arrangement requirement.

Preferably, the workpiece clamping mechanism comprises a clamping seat of a U-shaped fork structure, a first insertion hole is formed in a U-shaped side arm of the clamping seat, a positioning block is in sliding fit with the first insertion hole, a second insertion hole is formed in the U-shaped bottom end of the clamping seat, a pressing block is matched with the second insertion hole, and the pressing block is connected with a pressing oil cylinder. The slotting of the U-shaped fork is used for forming a channel for taking and placing the welding workpiece, the clamping seat is arranged through the first jack so as to vacate the channel for taking and placing the welding workpiece after exiting, the operation convenience is improved, and the workpiece is prevented from being assembled and disassembled in a plugging mode.

Further preferably, the facing surfaces of the positioning block and the pressing block are both provided with workpiece receiving grooves. The contact area of the positioning block and the pressing block with the welding workpiece is increased by the groove, the bearing surface is increased, and the workpiece is prevented from being pressed and deformed.

Preferably, the positioning block is further connected with a positioning oil cylinder. So as to take and place the locating piece through the hydro-cylinder, improve degree of automation and work efficiency.

Preferably, a lever is arranged between the positioning block and the positioning oil cylinder. The movement stroke of the positioning block is increased by utilizing the lever principle so as to select a small-stroke oil cylinder, thereby facilitating the reduction of cost and the structural layout.

Preferably, the tool apron consists of a bearing part and a scraper mounting part, the bearing part is provided with a U-shaped slot, and the scraper mounting part consists of a fixed mounting part and a movable mounting part to form a hoop type structure; the annular finishing scraper is of a two-segment combined structure, and the two segments are respectively arranged in the cutter mounting grooves of the fixed mounting part and the movable mounting part; the tail end of the annular finishing scraper is abutted against the bearing part of the cutter holder. The U-shaped slot is used for forming a workpiece picking and placing channel; the scraper mounting part of the cutter holder and the annular finishing scraper both form a two-section combined structure so as to conveniently take and place workpieces in an open state, and the finishing scraper forms an annular structure in a closed state, so that the operation convenience is improved, the finishing processing auxiliary time is reduced, and the finishing efficiency is improved. The supporting of the annular smoothing scraper and the cutter seat bearing part comprises direct supporting and indirect supporting through a third component, when the hardness difference of the materials of the annular smoothing scraper and the cutter seat bearing part is larger, indirect supporting is better, and the hardness of the third component is between that of the annular smoothing scraper and that of the cutter seat.

Further preferably, in the axial direction, a shim is further arranged between the annular smoothing scraper and the bearing part, the shim is also of a two-piece structure and is arranged in one-to-one correspondence with the two pieces of the annular smoothing scraper, and the diameter of an inner hole of the shim is larger than that of an inner hole formed by the cutter point of the annular smoothing scraper. When the annular smoothing scraper is made of high-speed steel or hard alloy and the cutter holder is made of ordinary medium-carbon steel or low-carbon steel, the hardness of the cutter pad is lower than that of the annular smoothing scraper and higher than that of the cutter holder, so that transition is formed through the cutter pad, damage to the cutter holder caused by overlarge hardness difference between the annular smoothing scraper and the cutter holder is avoided, and the service life of the cutter holder is prolonged.

Preferably, the annular finishing scraper is of a multi-tooth structure in the axial direction and the circumferential direction, each tooth on the same section forms a cutting tooth, and adjacent teeth in the axial direction are staggered. Through the multi-tooth structure, the cutting processing amount of each tooth is reasonably distributed, and the finishing processing resistance is reduced, so that a small-diameter oil cylinder is adopted, the energy consumption is reduced, and the manufacturing and using cost is saved.

In order to achieve the second objective, the present invention adopts the following technical solutions.

A flash welding machine comprises a welding unit formed by a flash welding machine and a welding seam finishing unit formed by a flash welding seam finishing device for realizing the first purpose.

By adopting the flash welding machine adopting the technical scheme, after flash butt welding is completed, the flash welding seam polishing device is used for polishing the welding seam to form combined structure equipment, welding and seam polishing treatment are organically combined, the flash welding seam polishing machine has the beneficial effect of the flash welding seam polishing device, can replace manual welding seam polishing work, eliminates potential safety hazards, effectively improves the quality of flash welding products and improves the efficiency.

Preferably, the flash welding machine forming the welding unit is fixedly arranged on the welding platform; the flash welding seam finishing device forming the seam finishing unit is arranged on the welding platform in a transversely movable manner and is connected with a finishing device driving oil cylinder. The flash welding seam polishing device drives the oil cylinder to drive the oil cylinder to transversely move through the polishing device so as to give way to a position capable of avoiding a workpiece during welding, and when polishing, the operation position convenient for taking and placing the workpiece is returned, so that the operation convenience is improved.

The beneficial effects of the utility model are that, the work of artifical welding seam of polishing can be replaced to flash welding seam polishing device, eliminates the potential safety hazard, effectively improves efficiency of polishing and welding seam polishing treatment quality, and applicable in the shaft-like or tubular structure flash of light butt welding product of slim type, connect long component like circular billet, band iron, pipe, rectangular pipe class. The flash welding machine organically combines welding and welding seam finishing treatment, has the same beneficial effect as a flash welding seam finishing device, and can provide an avoiding welding space.

Drawings

Fig. 1 is a front view of the flash welding seam finishing device of the present invention.

Fig. 2 is a view of the utility model in fig. 1 from direction a.

Fig. 3 is a view of the present invention from direction B of fig. 1.

Fig. 4 is a view of the present invention from direction C of fig. 1.

Fig. 5 is a schematic structural diagram of an annular smoothing scraper blade in the flash welding seam smoothing device of the present invention.

Fig. 6 is a cross-sectional view taken along line D-D of fig. 5 in accordance with the present invention.

Fig. 7 is a cross-sectional view E-E of fig. 5 according to the present invention.

Fig. 8 is a front view of the structure of the flash welding machine of the present invention.

Fig. 9 is a left side view of fig. 8 of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, which are not intended to limit the scope of the embodiments described herein.

Embodiment 1, refer to fig. 1, fig. 2, fig. 3, and fig. 4, a flash welding seam polishing device includes a workpiece clamping mechanism and an annular polishing scraper 1, the workpiece clamping mechanism is relatively fixedly disposed on a base 14, the annular polishing scraper 1 is fixedly connected to a tool apron 2, the tool apron 2 is capable of moving longitudinally relative to the workpiece clamping mechanism, and the tool apron 2 is connected to a tool apron driving oil cylinder 3; and the inner hole of the annular smoothing scraper 1 is suitable for the round shape of a round part extension welding, and the cutter holder 2 is arranged on the side wall of the front side of the base 14 through the guide structure of the two guide columns 15.

The workpiece clamping mechanism comprises a clamping seat 4 of a U-shaped fork structure, the clamping seat 4 is fixed on the same side wall of a base 14, which is provided with a tool apron 2, the U-shaped fork is horizontally arranged, a vertically arranged first jack is arranged on a U-shaped side arm of the clamping seat 4, a positioning block 5 is in sliding fit with the first jack, a horizontally arranged second jack is arranged at the U-shaped bottom end of the clamping seat 4, a pressing block 6 is matched with the second jack, and the pressing block 6 is connected with a pressing oil cylinder 7; the opposite surfaces of the positioning block 5 and the pressing block 6 are both provided with workpiece receiving grooves, and the positioning block 5 and the pressing block 6 are abutted against a workpiece through the groove walls of the workpiece receiving grooves; the workpiece receiving groove adopts an arc-shaped groove or a V-shaped groove which is suitable for a circular piece, and when the positioning block 5 and the pressing block 6 clamp the workpiece, the axis of the workpiece is positioned on the U-shaped symmetrical plane of the U-shaped fork and is superposed with the axis of the annular finishing scraper 1. The positioning block 5 is further connected with a positioning oil cylinder 8 which moves, a lever 9 is arranged between the positioning block 5 and the positioning oil cylinder 8, the lever 9 is hinged to the top end of the base 14, two ends of the lever 9 are hinged to the distal ends of piston rods of the positioning block 5 and the positioning oil cylinder 8 respectively, and a cylinder body of the positioning oil cylinder 8 is hinged to a cylinder seat fixedly connected to the back side wall of the base 14.

In addition, the tool apron 2 consists of a bearing part and a scraper mounting part, the bearing part is provided with a U-shaped slot, the U-shaped slot is consistent with the U-shaped slot of the U-shaped fork on the clamping seat 4 in orientation and is positioned on the same straight line, and the scraper mounting part consists of a fixed mounting part and a movable mounting part to form a hoop type structure; one end of a movable mounting part 20 is hinged on the fixed mounting part, and the other end of the movable mounting part is connected with the fixed mounting part through a screw 21 and a butterfly nut 22; the bearing part and the fixed mounting part form an integral structure, a guide hole is arranged on the combined part, the guide hole is in sliding fit with the guide post 15 and is connected with a piston rod of the cutter holder driving oil cylinder 3 through the combined part, and the cutter holder driving oil cylinder 3 is connected with the base 14; the two guide posts 15 are arranged in a vertically distributed manner, two ends of each guide post 15 are fixed on the guide post supporting seat 16, the guide post supporting seat 16 is fixed on the base 14, and the guide post supporting seat 16 is also used for limiting the limit position of the movement of the tool apron 2. Correspondingly, the annular smoothing scraper 1 is of a two-section combined structure, and the two cutter sections 2a are respectively arranged in the cutter mounting grooves of the fixed mounting part and the movable mounting part; the tail end of the annular finishing scraper 1 is abutted against the bearing part of the cutter holder 2; specifically, in the axial direction, the annular smoothing scraper 1 and a shim 10 is further arranged between the bearing parts, the shim 10 is also of a two-piece structure and is arranged in one-to-one correspondence with the two pieces of the annular smoothing scraper 1, and the diameter of an inner hole of the shim 10 is larger than that of an inner hole formed by the cutter point of the annular smoothing scraper 1.

In the scheme with higher requirement on weld finishing, as shown in fig. 5, 6 and 7, the annular finishing scraper 1 is in a multi-tooth structure in the axial direction and the circumferential direction, each tooth on the same section forms a cutting tooth, and adjacent teeth in the axial direction are staggered with each other. When the scheme is adopted, the annular smoothing scraper 1 is formed by combining a plurality of cutter blades 2a in the axial direction, a key groove 2c is arranged on the periphery to prevent circumferential dislocation, the front end of a tooth part forms a cutting edge, and a chip discharge groove 2b is formed between adjacent teeth.

In this implementation, the round bar or the round pipe piece suitable for the rectangular shape is welded to the length through flash welding.

The device of this embodiment, when being used for band iron, square steel, rectangular pipe, square steel pipe, polygon or special-shaped pipe section bar, locating piece 5 and compact heap 6 to and annular finishing scraper 1 need make into and form the cross-sectional shape with corresponding, and the size is to the structure that suits.

In the device of this embodiment, only one place has been demonstrated and has been set up work piece fixture, also can set up work piece fixture in two places, and the finish machining in-process forms tensile to the welding seam of postweld product, is applicable to the butt joint work piece that the welding seam area is great. When the two parts are arranged, except for one part as shown in the figure, the other part in front of the finishing stroke of the tool apron 2 is arranged, so that two sections of butt-welded products are clamped and fixed through the two parts of workpiece clamping mechanisms. In addition, when a workpiece clamping mechanism is arranged at one position, the workpiece clamping mechanism can also be arranged in front of the finishing stroke of the tool apron 2, and the workpiece clamping mechanism arranged in front is utilized to extrude the welding seam of the welded product in the finishing process, so that the hidden danger of weakening the strength of the welding seam is eliminated, and the workpiece clamping mechanism is more suitable for workpieces with relatively small welding seam area, such as tubular members and the like.

The device can also be arranged in a mode that the opening of the workpiece taking and placing channel faces upwards, and the whole device rotates 90 degrees anticlockwise according to the direction shown in the attached drawing 2.

When the device of the embodiment is used with a flash welding machine, the flash welding machine and the device can be arranged by taking the axis of a welding product as a reference line, wherein the device adopts the structure of a single workpiece clamping mechanism and is arranged at one end far away from the flash welding machine. Therefore, the clamping seat 4 is not required to be provided with a first jack with a U-shaped fork structure and a positioning block 5 in sliding fit, and a positioning block is not required to be independently set, the positioning structure on the clamping seat is directly arranged on the clamping seat 4, and a through hole is arranged on the clamping seat to replace a middle groove in the U-shaped fork. The U-shaped grooving on the bearing part of the corresponding tool apron 2 is replaced by the through hole, and the scraper mounting part, the annular smoothing scraper 1 and the shim 10 are also arranged into an integral structure to replace a two-segment structure, so that the structure can be simplified, and the manufacturing convenience, the structural strength and the rigidity are improved.

Example 2, referring to fig. 8 and 9, a flash welding machine includes a welding unit 11 constituted by a flash welding machine and a bead finishing unit 12 constituted by the flash weld bead finishing apparatus of example 1.

The flash welding machine forming the welding unit 11 is fixedly arranged on the welding platform 13; the flash welding seam finishing device forming the seam finishing unit 12 is transversely movably arranged on the welding platform 13 and is connected with a finishing device driving oil cylinder 16.

The welding platform 13 is provided with two guide rods 17, two ends of each guide rod 17 are supported on guide rod seats 18, guide support lugs are arranged on a base 14 of the flash welding machine, the guide support lugs and the guide rods 17 form a shaft hole matched sliding fit structure, a polishing device driving oil cylinder 16 is connected with a welding seam polishing unit 12 through an oil cylinder connecting seat of the base 14, and the polishing device driving oil cylinder 16 is located in the middle between the two guide rods 17 in the width direction.

In the embodiment, the flash welding machine can be properly lifted by the scheme that the opening of the workpiece taking and placing channel of the flash welding seam polishing device is arranged upwards, so that the axis of a lengthened welding product is superposed with the polishing axis of the flash welding seam polishing device during welding, the two parts are in a relatively fixed state, and the driving oil cylinder 16 of the polishing device and related components thereof can be saved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a flash welding seam burnishing device, its characterized in that includes work piece fixture and annular burnishing scraper (1), and work piece fixture is relatively fixed ground and sets up, and annular burnishing scraper (1) fixed connection is on blade holder (2), blade holder (2) can for work piece fixture longitudinal movement, blade holder (2) are connected with blade holder actuating cylinder (3).

2. The device according to claim 1, characterized in that the workpiece clamping mechanism comprises a clamping seat (4) of a U-shaped fork structure, a first insertion hole is formed in a U-shaped side arm of the clamping seat (4), a positioning block (5) is in sliding fit with the first insertion hole, a second insertion hole is formed in the U-shaped bottom end of the clamping seat (4), a pressing block (6) is in sliding fit with the second insertion hole, and the pressing block (6) is connected with a pressing oil cylinder (7).

3. Device according to claim 2, characterized in that the positioning block (5) and the pressing block (6) are provided with workpiece receiving grooves on their facing surfaces.

4. The device according to claim 2, characterized in that a positioning cylinder (8) is further connected to the positioning block (5).

5. The device according to claim 4, characterized in that a lever (9) is arranged between the positioning block (5) and the positioning cylinder (8).

6. The device according to any one of claims 1 to 5, characterized in that the tool apron (2) consists of a bearing part and a scraper mounting part, the bearing part is provided with a U-shaped slot, and the scraper mounting part consists of a fixed mounting part and a movable mounting part which form a hoop structure; the annular finishing scraper (1) is of a two-segment combined structure, and the two segments are respectively arranged in the cutter mounting grooves of the fixed mounting part and the movable mounting part; the tail end of the annular finishing scraper (1) is abutted against the bearing part of the cutter holder (2).

7. The device according to claim 6, characterized in that a shim (10) is arranged between the annular smoothing scraper (1) and the bearing part in the axial direction, the shim (10) is also in a two-piece structure and is arranged in one-to-one correspondence with the two pieces of the annular smoothing scraper (1), and the inner hole diameter of the shim (10) is larger than the inner hole diameter formed by the cutter point of the annular smoothing scraper (1).

8. A device according to any one of claims 1-5, characterized in that the annular burnishing blade (1) is multi-tooth in both axial and circumferential directions, each tooth in the same cross-section constitutes a cutting tooth, and axially adjacent teeth are offset from each other.

9. A flash welding machine comprising a welding unit (11) constituted by a flash welding machine, characterized by further comprising a weld finishing unit (12) constituted by a flash weld seam finishing device according to any one of claims 1 to 8.

10. A flash welding machine according to claim 9, characterized in that the flash welding machine constituting said welding unit (11) is fixedly arranged on a welding platform (13); the flash welding seam polishing device forming the seam polishing unit (12) is arranged on the welding platform (13) in a transversely movable mode and is connected with a polishing device driving oil cylinder (16).

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