CN210024083U - Spot welding machine - Google Patents

Abstract

The utility model relates to a spot welding machine, which comprises a frame and a feeding device, wherein the spot welding device is arranged on the frame, can vertically and horizontally move, is used for welding an adsorbed alloy sheet and a workpiece, is arranged on the frame, can synchronously and horizontally move along with the spot welding device, and is used for conveying the alloy sheet to an electrode; and the clamping device is used for clamping the workpiece when the alloy sheets are welded. The spot welding machine provided by the application has the advantages of high welding machining precision and high product qualification rate.

Description

Spot welding machine

Technical Field

The utility model belongs to the technical field of welding machine's technique and specifically relates to a spot welder.

Background

At present, people usually apply hard-face materials to the working faces of the most common metal parts through welding, the technology is called hard-face technology, different hard-face materials are coated by the hard-face technology, and the parts can be very wear-resistant, impact-resistant and corrosion-resistant, such as tungsten carbide radial bearings, stabilizers and the like. At present, the main approach for preparing products with the above properties is to fix the alloy blocks of the hard alloy material on the surface of the metal substrate. At present, the mode of fixing the alloy block mainly comprises two modes of gluing and spot welding, wherein the gluing method is mainly applied to a sintering process, and the spot welding method is mainly applied to a spray welding and surfacing welding process.

The hard alloy block is subjected to spot welding, namely, the welding flux at the bottom of the alloy sheet is melted by applying large current to the hard alloy block and utilizing resistance heating, so that the alloy sheet and the metal substrate are welded together. When roller parts with firm function need to be welded, alloy sheets are usually welded on the roller parts by spot welding, the roller parts are cylindrical, the processing mode of the prior art is that the roller parts are fixed firstly, then manual feeding (alloy sheets) is adopted to a limited position, then spot welding is carried out, the spot welding of an alloy sheet in the radial direction is finished, then the parts are rotated by a certain angle, and then an alloy sheet is manually taken out and then welding is carried out. The processing mode can generate the defects of larger position and distance deviation of the alloy sheet, unstable spot welding quality and the like, so that the qualification rate of products is reduced, and the efficiency is lower.

SUMMERY OF THE UTILITY MODEL

Solve the technical problem, an object of the utility model is to provide a spot welder, the welding process precision is high, and the product percent of pass is high.

The technical scheme of the utility model as follows:

a spot welding machine comprises a machine frame and a spot welding machine,

a spot welding device which is arranged on the frame, can vertically and horizontally move and is used for welding the adsorbed alloy sheet and a workpiece,

the feeding device is arranged on the frame, can synchronously and horizontally move along with the spot welding device and is used for conveying the alloy sheet to the electrode;

and the clamping device is used for clamping the workpiece when the alloy sheets are welded.

Preferably, the feeding device comprises:

a vibrating disk for automatically sequencing and conveying the alloy sheets,

and the conveying track is used for guiding the automatically sequenced alloy sheets to the spot welding device.

Preferably, a fixing seat is arranged at one end, close to the spot welding device, of the conveying rail, the fixing seat is horizontally arranged and provided with a feeding groove, and the feeding groove is communicated with the conveying rail.

Preferably, the fixing seat is provided with an adjusting part, and the adjusting part is used for adjusting the width of the conveying track.

Preferably, the spot welding device is provided with a material taking position and a welding position, the feeding device further comprises,

and the pushing mechanism is used for pushing the alloy sheet guided out by the conveying track to the material taking position.

Preferably, the pushing mechanism comprises a first telescopic piece arranged on the rack and used for pushing the alloy sheet; the extension rod is arranged on the first telescopic piece, a clamping groove is formed in the extension rod, and when the extension rod is in a retracted state, the clamping groove is communicated with the feeding groove; when the extension rod is in an extension state, the extension rod pushes the alloy sheet to a material taking position.

Preferably, the spot welding device further includes: the lifting piece is connected with the first telescopic piece and can move up and down, the extension rod is arranged on the lifting piece, and a gap exists between the upper end face of the extension rod and the lower end face of the electrode when the lifting piece is in a normal state.

Preferably, the spot welding apparatus further comprises a welding rod and an electrode, the welding rod being connected to the electrode,

a gas channel is arranged in the welding rod,

the gas channel is communicated with a gas outlet hole arranged at the end part of the electrode.

Preferably, the spot welding device further includes:

a first drive mechanism coupled to the welding rod for moving the electrode in a direction toward the workpiece;

and the second driving mechanism is connected with the first driving mechanism and used for pushing the electrode to complete welding.

Preferably, the mobile device is arranged on the rack, and the mobile device further comprises:

a first moving mechanism moving in a plane in the alloy sheet conveying direction,

and a second moving mechanism which moves in a direction perpendicular to the alloy sheet conveying direction.

The utility model provides a spot welding machine, which comprises a frame, a spot welding device which is arranged on the frame and can move vertically and horizontally, is used for welding an adsorbed alloy sheet and a workpiece, a feeding device which is arranged on the frame, can move horizontally along with the spot welding device synchronously and is used for conveying the alloy sheet to an electrode; clamping device for clamping a workpiece when welding alloy sheets. The clamping device clamps a workpiece, the feeding device automatically conveys alloy sheets to the electrode arranged on the spot welding device, the alloy sheets are adsorbed at the electrode end, the lifting device operates to attach the alloy sheets to the surface of the workpiece, the spot welding device releases current, the bonding materials below the alloy sheets are melted, the alloy sheets are adhered to the surface of the workpiece, and the electrode returns to the initial position. When the spot welding work of the alloy sheet on the same bus of the workpiece is finished, the workpiece rotating device rotates for a set angle under the accurate control of the numerical control system, then the feeding device starts to automatically feed again, and the spot welding work of the alloy sheet is continued until the spot welding work of the whole workpiece is finished. The spot welder of this application, automatic feeding compares traditional manual material loading, and the rigidity of material loading is unified, and the electrode moves on the plane and in vertical direction, and whole welding process uniformity is good, and the welding process precision is high, and then the product percent of pass is high and can realize alone multimachine operation, has saved the cost of labor greatly.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of the spot welder in a feeding state in the present embodiment;

FIG. 2 is a schematic structural diagram of the spot welder when the alloy sheet is conveyed to the lower end of the electrode in the embodiment;

fig. 3 is a partially enlarged schematic view of the spot welding apparatus in this embodiment.

Reference numbers in the drawings illustrate: 1. a frame; 2. an electrode; 3. a spot welding device; 31. an adjustment member; 32. a fixed seat; 33. welding a frame; 34. a first telescoping member; 35. an extension rod; 36. a lifting member; 37. welding a rod; 38. a first drive mechanism; 39. a second drive mechanism; 4. a mobile device; 41. a first moving mechanism; 42. a second moving mechanism; 5. a clamping device; 6. a feeding device; 61. a vibrating pan; 62. a conveying track.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to 3, in an embodiment of the present invention, a spot welding machine is provided, which includes a frame 1, a spot welding device 3 disposed on the frame 1 and capable of moving vertically and horizontally for welding an adsorbed alloy sheet and a workpiece, and a feeding device 6 disposed on the frame 1 and capable of moving horizontally and synchronously with the spot welding device 3 for feeding the alloy sheet to an electrode; a clamping device 5 for clamping the workpiece when welding the alloy sheets. The clamping device 5 clamps the workpiece, the feeding device 6 automatically conveys the alloy sheet to the electrode 2 arranged on the spot welding device 3, the spot welding device 3 releases current, the alloy sheet melts and is adhered to the surface of the workpiece, and the electrode 2 returns to the initial position. When the spot welding work of the alloy sheet on the same bus of the workpiece is finished, the feeding device 6 starts to automatically feed again, and the spot welding work of the alloy sheet is continued until the spot welding work of the whole workpiece is finished. The application discloses spot welder, automatic feeding compares traditional manual material loading, and the rigidity of material loading is unified, and electrode 2 moves on the plane and vertical direction, and whole welding process uniformity is good, and the welding process precision is high, and then the product percent of pass is high.

The clamping device 5 includes a chuck and a top support member, and the chuck may be a hydraulic chuck, a mechanical chuck, or a pneumatic chuck, without specific limitation. The clamping force of the clamping head is adjustable. For example, when the workpiece is in a cylindrical shape, the chuck clamps one end of the workpiece, and the other end of the workpiece is supported by the supporting member. And after the alloy sheet welding work is finished, the chuck loosens the workpiece. Preferably, in order to improve the stability of clamping the workpiece, a support member may be disposed at the bottom of the workpiece, and the support member is located on the frame 1. The supporting piece can adopt a U shape or a V shape, and the specific shape of the supporting piece can be arranged according to the shape of the workpiece so as to contact the workpiece and provide an auxiliary supporting point for the workpiece. When the workpiece is in a square or triangular shape or other shapes, the combined clamp is arranged, and the chuck clamps the combined clamp.

The feeding device 6 in this application comprises: a vibrating tray 61 for automatically sequencing and conveying the alloy sheets, and a conveying track 62 for guiding the automatically sequenced alloy sheets to the spot welding device 3. A pulse electromagnet is arranged below the hopper of the vibration disc 61, so that the hopper vibrates in the vertical direction, and the inclined spring piece drives the hopper to do torsional vibration around the vertical axis of the hopper. Alloy pieces in the hopper rise along the internal spiral track due to the vibration, and after a series of screening or posture changes in the rising process, the alloy pieces can be in a uniform state according to the welding processing requirements and then conveyed to the conveying track 62, and the alloy pieces slide down to the outlet of the conveying track 62 along the conveying track 62. And then the disordered workpieces are automatically, orderly, directionally and regularly arranged and accurately conveyed to the next procedure. In order to prevent the alloy piece from falling off the conveying rail 62 when the alloy piece slides down the conveying rail 62, flanges are provided on both sides of the conveying rail 62.

In the embodiment of the application, the conveying rail 62 is close to one end of the spot welding device 3 is provided with the fixing seat 32, the fixing seat 32 is horizontally arranged and is provided with the feeding groove, and the feeding groove is communicated with the conveying rail 62. Preferably, the feeding device 6 further comprises a push rod for pushing the alloy sheet in the feeding chute, and the alloy sheet has inertia of movement when sliding down from the vibration disk 61 and the conveying rail 62. The fixed seat 32 is arranged at the outlet position of the conveying track 62, so that the feeding groove arranged on the fixed seat 32 is communicated with the discharge port of the conveying track 62, one end of the conveying track 62 is communicated with the vibration disc 61, and the other end of the conveying track is communicated with the feeding groove. Because the fixed seat 32 is stably arranged, the alloy sheet is in the feeding groove, the friction force generated by the alloy sheet and the feeding groove is offset with the inertia force generated by the alloy sheet sliding from the conveying track, so that the alloy sheet does not have movement inertia and is in a balanced state, and the push rod pushes out the alloy sheet in the feeding groove. The push rod can be set in a poking and pushing mode, and the push direction of the push rod is consistent with the movement direction of the alloy sheet.

Wherein, the fixing base 32 is provided with an adjusting piece 31, and the adjusting piece 31 is used for adjusting the width of the conveying track 62. The alloy pieces vibrated by the vibration plate 61 are automatically sorted and conveyed along the conveying rail 62. In order to enable the same conveying track 62 to meet the width requirements of alloy sheets with different sizes on the conveying track 62, the adjusting piece 31 is stably arranged on the fixed seat 32, and the adjusting piece 31 is used for adjusting the width of the conveying track 62. Preferably, the adjusting member 31 is an adjusting button, and twisting the adjusting button can adjust the width between the flanges on both sides of the conveying track 62. The fixing of fixing base 32 sets up to regulating part 31 and provides steady auxiliary stay for regulating part 31 can not be because of vibration or other external force, makes the adjustment of delivery track 62 wantonly, has improved spot welder's security.

In the embodiment of the present application, the spot welding device 3 has a material taking position, a welding position, and a feeding device 6, and further includes a pushing mechanism for pushing the alloy sheet guided out by the conveying rail 62 to the material taking position. The pushing mechanism divides the spot welding device 3 into a material taking position and a welding position, so that the material taking action and the welding action of the spot welding device are separated by a certain distance, and the adverse effect of heat generated in the welding process on the material taking of parts of the spot welding machine is avoided.

Wherein, push mechanism still includes: the first telescopic piece 34 is arranged on the frame and used for pushing alloy sheets, the extension rod 35 is arranged on the first telescopic piece 34, a material clamping groove is formed in the extension rod 35, and when the extension rod 35 is in a retraction state, the material clamping groove is communicated with the feeding groove;

when the extension rod 35 is in the extended state, the extension rod 35 pushes the alloy sheet to the material taking position. When the extension rod 35 is in an extension state, the material clamping groove is positioned at the lower end of the electrode 2. The alloy sheet is conveyed to the lower end of the electrode 2, the moving distance of the electrode 2 is reduced, and the loss of key working parts is avoided. When the first telescopic piece 34 retracts, the material clamping groove is communicated with the material feeding groove, the alloy sheet in the material feeding groove is pushed to the material clamping groove by the push rod, and the alloy sheet is clamped in the material clamping groove. Then, when the first expansion piece 34 is in an expansion state, the extension rod 35 carries the alloy sheet to expand together until the material clamping groove is positioned at the lower end of the electrode 2, and the alloy sheet is conveyed to the bottom of the electrode 2. The process avoids the transverse and longitudinal movement of the electrode 2 in a plane, reduces the movement of the electrode 2, avoids the abrasion of the working arm provided with the electrode 2 and prolongs the service life of the spot welding machine.

Further, the spot welding device 3 further includes a lifting member 36 connected to the first telescopic member 34 and movable up and down, the extension rod 35 is disposed on the lifting member 36, and a gap is formed between an upper end surface of the extension rod 35 and a lower end of the electrode 2 when the lifting member 36 is in a normal state. The normal state of the elevating member 36 is that the elevating member 36 is in a low position, and the abnormal state of the elevating member 36 is that the elevating member 36 is in an elevated state, and when the elevating member 36 carries the extension bar 35 in the normal state, the upper end of the extension bar 35 is spaced from the lower end surface of the electrode 2. The first telescopic member 34 can be effectively prevented from colliding with the electrode 2 in the process of extending out with the extension rod 35, and the arrangement improves the safe operation of the spot welding machine.

In this application embodiment, spot welding device 3 still includes electrode 2 and welding rod 37, and welding rod 37 is connected with electrode 2, and welding rod 37 is inside to be equipped with gas passage, gas passage and the venthole intercommunication of locating electrode 2 tip. When the first telescopic part 34 carries the extension rod 35 to move to the lower end of the electrode 2, the lifting part 36 is lifted, so that the lifting part 36 is located at a high position, the distance between an alloy sheet in the extension rod 35 and the electrode 2 is reduced, in order to enable the electrode 2 to grab the alloy sheet, a gas channel is arranged inside a welding rod 37 connected with the electrode 2, the gas channel is communicated with an air outlet hole formed in the end part of the motor, and the gas channel is communicated with an external vacuum generator, so that high-pressure gas of the vacuum generator can flow to the air outlet hole from the gas channel. When the lower end face of the electrode 2 is brought into contact with the alloy sheet, a temporary closed space is formed between the welding rod 37 and the electrode 2. Then the air in the closed space is pumped away through a pneumatic pipeline or other devices, and the air pressure in the closed space is lower than the external atmospheric pressure. Thus, a difference in pressure between the inside and the outside is generated, and the object and the lower end surface of the electrode 2 are firmly pressed together by the outside atmospheric pressure. The electrode 2 thus attracts the alloy sheet. When the electrode 2 conveys the alloy sheet to the surface to be welded of the workpiece and the welding work is finished, air is introduced into the welding rod 37 through a pneumatic pipeline or other devices, the closed space is communicated with the outside atmospheric pressure, and the electrode 2 is separated from the alloy sheet and returns to the initial position.

Wherein, spot welding device 3 still includes: a first drive 38 connected to the welding rod 37 for moving the electrode 2 in the direction of the workpiece; and a second driving mechanism 39 connected to the first driving mechanism 38 for pushing the electrode 2 to complete welding. When the air pressure makes the electrode 2 absorb the alloy sheet, the first driving mechanism 38 drives the welding rod 37 to drive the electrode 2 to move towards the workpiece, when the alloy sheet contacts with the surface to be welded of the workpiece, the first driving mechanism 38 stops driving, and the second driving mechanism 39 drives the electrode 2 again to complete the welding work.

Preferably, the moving device 4 includes a first moving mechanism 41 that moves in a plane in the alloy sheet conveying direction, and a second moving mechanism 42 that moves in a direction perpendicular to the alloy sheet conveying direction. Preferably, the first moving mechanism 41 is disposed on the rack 1, the first moving mechanism 41 includes a sliding rail and a sliding block, wherein the sliding rail is fixed, or the sliding block is fixed, and the first moving mechanism 41 can be arbitrarily disposed, as long as the sliding rail and the sliding block move relatively, and the direction of the relative movement is consistent with the conveying direction of the alloy sheet, a mounting plate can be disposed at the upper end of the first moving mechanism 41, the second moving mechanism 42 is disposed on the mounting plate, and similarly, the second moving mechanism 42 includes a sliding rail and a sliding block, and the sliding rail and the sliding block move relatively, and the direction of the relative movement is perpendicular to the conveying direction of the alloy sheet. Another mounting plate can be arranged on the second moving mechanism 42, and the spot welding device 3 and the feeding device 6 are arranged on the mounting plate, so that the alloy sheet can move freely in a plane relative to the electrode 2, the operation stroke of the spot welding machine is improved, and the utilization rate of the equipment is improved.

The spot welding machine further comprises a control system for sending action commands to the moving device 4, the spot welding device 3, the clamping device 5 and the feeding device 6. The sequence, the position, the time interval and the like of the movement of each device and each mechanism can be set according to the actual situation.

For the preferred embodiment, the working principle of the spot welding machine is illustrated, and the working process is that an operator clamps a workpiece, clamps the workpiece, and the control system sends out a discharging instruction, so that the vibration disk 61 starts to vibrate, so that the alloy sheets arranged in the vibration disk 61 are orderly arranged and conveyed to the feeding groove arranged on the adjusting member 31 along the conveying channel. The push rod pushes the alloy sheet in the feeding groove to a material clamping groove in the extension rod 35, and the extension rod 35 is in a retraction state at the moment. The first telescopic member 34 changes the state of the extension rod 35 from a retracted state to an extended state, at which point the alloy sheet is located at the lower end of the electrode 2 but with a certain clearance from the lower end face of the electrode 2, and then the elevation member 36 provided above the first telescopic member 34 is raised so that the extension rod 35 located on the elevation member 36 is raised together, reducing the clearance between the alloy sheet and the lower end face of the electrode 2. The electrode 2 sucks the alloy piece by the air pressure, and the first extensible member 34 retracts. Subsequently, the second driving mechanism 39 drives the electrode 2 to complete welding. The electrode 2 loosens the alloy sheet and the electrode 2 is retracted to the initial position. The welding of one alloy piece is completed. The process is repeated continuously until the welding work of the whole workpiece is completed. When the alloy sheet needs to be adjusted in the transverse and/or longitudinal position, the first moving mechanism 41 and/or the second moving mechanism 42 correspondingly move. When the angle of the workpiece relative to the electrode 2 needs to be adjusted, the control system causes the hydraulic chuck to rotate by a corresponding angle.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A spot welding machine, characterized in that it comprises a frame (1) and,

a spot welding device (3) which is arranged on the frame (1), can move vertically and horizontally and is used for welding the adsorbed alloy sheet and a workpiece,

the feeding device (6) is arranged on the rack (1), can synchronously and horizontally move along with the spot welding device (3) and is used for conveying the alloy sheet to the electrode;

and a clamping device (5) for clamping the workpiece when welding the alloy sheets.

2. A spot welder as claimed in claim 1, characterized in that said feeding device (6) comprises:

a vibrating disk (61) for automatically sequencing and conveying the alloy sheets,

a conveying track (62) for guiding the automatically sequenced alloy sheets to the spot welding device (3).

3. A spot welder as claimed in claim 2, characterized in that the end of said conveying track (62) close to said spot welding device (3) is provided with a holder (32), said holder (32) being arranged horizontally and provided with a feed chute, said feed chute communicating with said conveying track (62).

4. A spot-welding machine as claimed in claim 3, characterized in that said fixed seat (32) is provided with an adjusting member (31), said adjusting member (31) being intended to adjust the width of the conveyor track (62).

5. A spot welding machine as claimed in claim 4, characterized in that said spot welding device (3) has a pick-up station and a welding station,

the feeding device (6) also comprises a feeding device,

and the pushing mechanism is used for pushing the alloy sheet guided out by the conveying track (62) to the material taking position.

6. The spot welder of claim 5, wherein the pushing mechanism comprises,

a first telescopic piece (34) arranged on the frame (1) and used for pushing the alloy sheet;

the extension rod (35) is arranged on the first telescopic piece (34), a clamping groove is formed in the extension rod (35), and when the extension rod (35) is in a retracted state, the clamping groove is communicated with the feeding device;

when the extension rod (35) is in an extension state, the extension rod (35) pushes the alloy sheet to a material taking position.

7. A spot welder according to claim 6, characterized in that said spot welding device (3) further comprises:

a raising member (36) connected to the first telescopic member (34) and movable up and down,

the extension rod (35) is arranged on the lifting piece (36),

when the lifting piece (36) is in a normal state, a gap exists between the upper end surface of the extension rod (35) and the lower end surface of the electrode (2).

8. A spot welder according to any of the claims 1 to 7, characterized in that the spot welding device (3) further comprises a welding rod (37) and an electrode (2), the welding rod (37) being connected with the electrode (2),

a gas channel is arranged in the welding rod (37),

the gas channel is communicated with a gas outlet hole arranged at the end part of the electrode (2).

9. A spot welder according to claim 8, characterized in that said spot welding device (3) further comprises:

a first drive mechanism (38) connected to the welding rod (37) for moving the electrode (2) in the direction of the workpiece;

and the second driving mechanism (39) is connected with the first driving mechanism (38) and is used for pushing the electrode (2) to complete welding.

10. A spot welder as claimed in claim 1, characterized by further comprising moving means (4), said moving means (4) being provided on said frame (1), said moving means (4) further comprising:

a first moving mechanism (41) that moves in a plane in the alloy sheet conveying direction,

and a second moving mechanism (42) which moves in a direction perpendicular to the alloy sheet conveying direction.

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