Fixture for welding and fixing slender rod piece

Abstract

The utility model relates to the field of welding fixtures, and particularly discloses a welding and fixing fixture for a slender rod piece. The welding and fixing fixture comprises at least one clamping and fixing unit, the attaching area of the attaching unit is located on the side face of the outer cylindrical face of the rod piece; the limiting area of the limiting unit is located on the side face of the outer cylindrical face of the rod piece. According to the clamping device, one-time clamping and fixing can be carried out during full-length welding of the slender rod piece, the welding process is not affected, the welding efficiency is improved, and the welding cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of welding fixtures, in particular to a slender rod welding fixing fixture. Background Art

[0002] The steel wire assembly of the automobile seat frame is welded according to the design with multiple steel wires of different structural shapes, and the contact area of ​​multiple steel wires is fully welded to enhance the structural strength of the seat frame. Since the overall diameter of the steel wire is small and the overall size of the seat frame is large, such as the length of the large rear seat frame of two seats, the steel wire needs to be effectively clamped and fixed during welding, but it cannot affect the welding of the welding area by the welding equipment. However, when a certain steel wire is used as the core of the seat frame or as a reinforcement of a part of the area, it needs to be fully welded with one or more other steel wires (more than 90% of the area on the axial direction of the rod is welded and fixed). However, if the steel wire is longer and forms a slender rod structure, if multiple circumferential clamping and fixing are not performed at this time, the steel wire will produce a more obvious complete deformation due to gravity, resulting in the failure of welding to meet the standard, but multiple circumferential clamping and fixing will make full welding impossible.

[0003] In view of the above situation, external clamping fixtures or segmented welding are generally used. The external clamping fixtures are used to weld unnecessary ear plates and other structural parts on the steel wire, and the steel wire is clamped by clamping the ear plates and other structural parts. However, for slender steel wires, multiple ear plate structural parts need to be welded, and the welding accuracy between the ear plates and the steel wires needs to be ensured. Otherwise, the steel wire will be inaccurately positioned by repositioning the steel wire through the ear plates. This method has more processes and the ear plate structural parts will be wasted. The segmented welding method can directly clamp and fix the steel wire without using ear plates, but the clamping and separation of the clamp for clamping the steel wire needs to be adjusted in real time during the welding process. The whole process is cumbersome to operate. At the same time, due to the segmented clamping, axial stress will be generated inside the steel wire during the welding process, resulting in changes in the overall structural strength of the seat frame. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a slender rod welding fixing fixture, which can clamp and fix the slender rod once when it is fully welded, and has no influence on the welding process, thereby improving welding efficiency and reducing welding costs.

[0005] The purpose of the utility model is achieved through such technical solution:

[0006] A slender rod welding fixture, comprising:

[0007] at least one clamping and fixing unit;

[0008] At least one attachment unit, whose attachment area is located on the side of the outer cylindrical surface of the rod;

[0009] At least one limiting unit, whose limiting area is located on the side of the outer cylindrical surface of the rod;

[0010] The limiting unit comprises:

[0011] A first parallel jaw cylinder is located on one side of the rod;

[0012] The adsorption member is arranged on the slide plate of the first parallel jaw cylinder, and the adsorption surface faces the side surface of the outer cylindrical surface of the rod member and fits with the outer cylindrical surface of the rod member;

[0013] At least two positioning jackscrews are respectively arranged on the two clamping plates of the first parallel clamping jaw cylinder, facing the outer cylindrical surface of the rod; when the first parallel clamping jaw cylinder is closed, the ends of the positioning jackscrews push against the outer cylindrical surface of the rod; the axis of the rod is located in the area surrounded by the contact points of the two ends of the positioning jackscrews and the rod, and the contact surface of the adsorption member and the rod.

[0014] Furthermore, the clamping and fixing unit comprises:

[0015] Second parallel jaw cylinder;

[0016] Two clamping heads are respectively and oppositely arranged on the inner side surfaces of the two clamping plates of the second parallel clamping cylinder. When the second parallel clamping cylinder is closed, the two clamping heads relatively fix the outer cylindrical surface of the rod; the clamping heads are fixed to the clamping plates of the second parallel clamping cylinder by screws; the ends of the clamping heads are provided with groove surfaces that fit the cylindrical surfaces of the rods; the groove surfaces are provided with a plurality of protrusions that enhance the clamping force; the protrusions are strip-shaped, and the planes where the protrusions are located are perpendicular to the axis of the rod.

[0017] Furthermore, the attaching unit comprises:

[0018] An attachment seat is arranged on one side of the rod;

[0019] The attaching head is connected to the attaching seat; the attaching head is magnetic and absorbs the rod; the contact surface between the attaching head and the rod is an arc groove surface, which fits the cylindrical surface of the rod.

[0020] Furthermore, the adsorption member comprises:

[0021] An adsorption column is fixedly connected to the slide plate of the first parallel clamping jaw cylinder;

[0022] The adsorption head is connected to the end of the adsorption column and is located between the two clamping plates of the first parallel clamping cylinder; the adsorption head is magnetic and adsorbs the rod; the contact surface between the adsorption head and the rod is an arc groove shape and fits the cylindrical surface of the rod; the positioning top screw is directly opposite to the adsorption head.

[0023] Furthermore, a notch groove is provided on the side of the slide plate of the first parallel clamping jaw cylinder; the opening of the notch groove faces the rod; and a threaded hole with an internal thread is provided at the bottom of the notch groove;

[0024] The tail end of the adsorption column is located in the notch groove; the tail end of the adsorption column is limited by the notch groove; the tail end of the adsorption column is provided with a through hole facing the threaded hole; the adsorption column is fixed in the notch groove by screws.

[0025] Furthermore, a receiving hole facing the rod is provided on the clamping plate of the first parallel clamping jaw cylinder; the tail end of the positioning top screw is located in the receiving hole and is restricted by the receiving hole.

[0026] Furthermore, the receiving hole is through-going; a bottom plate is arranged in the receiving hole; a spring is arranged between the bottom plate and the bottom of the receiving hole; and the tail end of the positioning top screw is in contact with the bottom plate.

[0027] Furthermore, a barrel-shaped pipe fitting is provided on the outer side surface of the clamping plate, which is opposite to the receiving hole, and the opening is opposite to the receiving hole; a spring is provided in the pipe fitting; the bottom plate is a magnetic column; the magnetic column is slidably limited by the inner groove of the pipe fitting and the receiving hole; an insertion hole is provided at the exposed end of the magnetic column; the positioning top screw is inserted in the insertion hole and adsorbed by the magnetic column.

[0028] Furthermore, it also includes a fixed plate; the fixed plate is provided with a first limiting slide groove and a second limiting slide groove parallel to the axis of the rod; the sliding limit of the clamping and fixing unit is set in the first limiting slide groove; the sliding limit of the clamping and fixing unit and the attachment unit is set in the second limiting slide groove.

[0029] Furthermore, the clamping and fixing unit is set in the first limiting sliding groove by sliding and limiting the quick clamp, and the clamping and fixing unit and the attaching unit are also set in the second limiting sliding groove by sliding and limiting the quick clamp.

[0030] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0031] 1. Effectively position and clamp one or more parts of the rod by using a clamping and fixing unit; ensure accurate positioning of the rod; and guide the deformation of the easily deformed area in the middle of the rod by using the attachment unit.

[0032] 2. The easily deformed area of ​​the rod is limited by the limit unit. The limited area is the area where the adsorption head is located, which has little impact on the welding of the rod. At the same time, the positioning screw can be directly welded to the rod during the welding process, which has no impact on the structure of the rod and reduces the amount of material waste.

[0033] 3. The whole rod can be positioned and fixed at one time, which can minimize the impact on the operation when the rod is fully welded, and the welding quality and efficiency are high.

[0034] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings of the present utility model are as follows:

[0036] Figure 1 This is a schematic diagram of the top view of the slender rod welding and fixing fixture in Example 1.

[0037] Figure 2 This is a schematic diagram of the front view structure of the clamping and fixing unit in Example 1.

[0038] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0039] Figure 4 This is a schematic diagram of the front view structure of the attachment unit in Example 1.

[0040] Figure 5 This is a front view structural schematic diagram of the limiting unit in Example 1.

[0041] Figure 6 for Figure 5 Enlarged structural diagram at B in the middle.

[0042] Figure 7 for Figure 5 Schematic diagram of the top view structure.

[0043] Figure 8 for Figure 5 Schematic diagram of the structure at the CC section.

[0044] Fig. 9 This is a schematic diagram of the top view of the limiting unit in Example 2.

[0045] Fig.10 This is a schematic diagram of the cross-sectional structure of the limiting unit in Example 2.

[0046] In the figure: 1. fixing plate; 11. first limiting slide groove; 12. second limiting slide groove; 21. second parallel clamping jaw cylinder; 22. clamping head; 221. protrusion; 31. attachment seat; 32. attachment head; 41. first parallel clamping jaw cylinder; 411. notch groove; 412. accommodation hole; 413. slide plate; 42. adsorption member; 421. adsorption column; 422. adsorption head; 423. screw; 43. positioning top screw; 44. spring; 45. magnetic column; 451. socket; 46. pipe fitting; 5. rod. DETAILED DESCRIPTION

[0047] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0048] Embodiment 1:

[0049] like Figure 1-8 As shown, a welding fixture for a slender rod 5 includes:

[0050] Two clamping fixing units;

[0051] Two attachment units, whose attachment areas are located on the side surfaces of the outer cylindrical surface of the rod 5;

[0052] Two limiting units, whose limiting areas are located on the side surfaces of the outer cylindrical surface of the rod 5;

[0053] The limiting unit comprises:

[0054] The first parallel clamping jaw cylinder 41 is located on one side of the rod 5;

[0055] The adsorption member 42 is arranged on the slide plate 413 of the first parallel jaw cylinder 41, and the adsorption surface faces the side surface of the outer cylindrical surface of the rod 5 and fits with the outer cylindrical surface of the rod 5;

[0056] Two positioning top screws 43 are respectively arranged on the two clamping plates of the first parallel clamping jaw cylinder 41, facing the outer cylindrical surface of the rod 5; when the first parallel clamping jaw cylinder 41 is closed, the ends of the positioning top screws 43 push against the outer cylindrical surface of the rod 5; the axis of the rod 5 is located in the area surrounded by the contact points between the two ends of the positioning top screws 43 and the rod 5, and the contact surface between the adsorption member 42 and the rod 5.

[0057] The rod 5 is effectively positioned and clamped at one or more locations by using a clamping and fixing unit; the accurate positioning of the rod 5 is ensured; and the deformation guidance of the easily deformed area in the middle of the rod 5 is achieved by the attachment unit. The easily deformed area of ​​the rod 5 is limited by the limiting unit, and the limited area is the area where the adsorption head 422 is located, which has little impact on the welding of the rod 5. At the same time, the positioning top screw 43 can be directly welded to the rod 5 during the welding process, which has no impact on the structure of the rod 5 and has little material waste. The rod 5 can be positioned and fixed as a whole at one time, which minimizes the impact on the operation of the rod 5 when it is fully welded, and the welding quality and efficiency are high.

[0058] In this embodiment, the clamping and fixing unit includes:

[0059] Second parallel gripper cylinder 21;

[0060] The two clamping heads 22 are respectively and oppositely arranged on the inner side surfaces of the two clamping plates of the second parallel clamping jaw cylinder 21. When the second parallel clamping jaw cylinder 21 is closed, the two clamping heads 22 relatively fix the outer cylindrical surface of the rod 5; the clamping heads 22 are fixed to the clamping plates of the second parallel clamping jaw cylinder 21 by means of screws 423; the ends of the clamping heads 22 are provided with groove surfaces that fit the cylindrical surfaces of the rod 5; the groove surfaces are provided with a plurality of protrusions 221 for enhancing the clamping force; the protrusions 221 are strip-shaped, and the plane where the protrusions 221 are located is perpendicular to the axis of the rod 5.

[0061] The parallel clamping cylinder can reduce the impact of the clamping plate on the space around the rod 5, and the clamping head 22 is used as a force-bearing member to provide sufficient operating space for the welding equipment while reducing the clamping contact surface.

[0062] In this embodiment, the attaching unit includes:

[0063] An attachment seat 31 is provided on one side of the rod 5;

[0064] The attaching head 32 is connected to the attaching seat 31 ; the attaching head 32 is magnetic and absorbs the rod 5 ; the contact surface between the attaching head 32 and the rod 5 is an arc groove surface, which fits the cylindrical surface of the rod 5 .

[0065] In this embodiment, the adsorption member 42 includes:

[0066] The adsorption column 421 is fixedly connected to the slide plate 413 of the first parallel clamping jaw cylinder 41;

[0067] The adsorption head 422 is connected to the head end of the adsorption column 421 and is located between the two clamping plates of the first parallel clamping cylinder 41; the adsorption head 422 is magnetic and adsorbs the rod 5; the contact surface between the adsorption head 422 and the rod 5 is an arc groove shape, which fits the cylindrical surface of the rod 5; the positioning top screw 43 is directly opposite to the adsorption head 422.

[0068] In this embodiment, a notch groove 411 is provided on the side of the slide plate 413 of the first parallel clamping jaw cylinder 41; the opening of the notch groove 411 faces the rod 5; and a threaded hole with an internal thread is provided at the bottom of the notch groove 411;

[0069] The tail end of the adsorption column 421 is located in the notch groove 411 ; the tail end of the adsorption column 421 is limited by the notch groove 411 ; the tail end of the adsorption column 421 is provided with a through hole facing the threaded hole; the adsorption column 421 is fixed in the notch groove 411 by a screw 423 .

[0070] The notch groove 411 can ensure the positioning and firmness of the adsorption column 421 .

[0071] In this embodiment, a receiving hole 412 facing the rod 5 is provided on the clamping plate of the first parallel clamping jaw cylinder 41 ; the tail end of the positioning top screw 43 is located in the receiving hole 412 and is restricted by the receiving hole 412 .

[0072] In this embodiment, the receiving hole 412 is penetrated; a bottom plate is provided in the receiving hole 412; a spring 44 is provided between the bottom plate and the bottom of the receiving hole 412; and the tail end of the positioning top screw 43 is in contact with the bottom plate.

[0073] The extrusion generated when the first flat-type clamp cylinder moves is transmitted to the positioning screw 43. In order to prevent the positioning screw 43 from being over-extruded and deformed and losing its pressing and limiting effect on the surface of the rod 5, a spring 44 is designed to ensure the limitation.

[0074] In this embodiment, the outer side surface of the splint is provided with a barrel-shaped pipe fitting 46 which is opposite to the accommodating hole 412, and the opening is opposite to the accommodating hole 412; a spring 44 is provided inside the pipe fitting 46; the bottom plate is a magnetic column 45; the magnetic column 45 is slidably limited by the inner groove of the pipe fitting 46 and the accommodating hole 412; an insertion hole 451 is provided at the exposed end of the magnetic column 45; the positioning top screw 43 is inserted into the insertion hole 451 and is adsorbed by the magnetic column 45.

[0075] The magnetic column 45 can quickly fix the positioning screw 43 , and after the positioning screw 43 is welded to the rod 5 , the separation of the first flat-plate clamping jaw cylinder will not be restricted by the positioning screw 43 .

[0076] In this embodiment, it also includes a fixed plate 1; the fixed plate 1 is provided with a first limiting groove 11 and a second limiting groove 12 which are parallel to the axis of the rod 5; the sliding limit of the clamping and fixing unit is set in the first limiting groove 11; the sliding limit of the clamping and fixing unit and the attachment unit is set in the second limiting groove 12.

[0077] The positions of the clamping unit, the fastening unit and the attaching unit can be changed by the first limiting sliding groove 11 and the second limiting sliding groove 12 to ensure the deformation control of the rod 5 and minimize the impact on the welding area.

[0078] The clamping and fixing unit is set in the first limiting slot 11 by sliding and limiting through a quick clamp (not shown in the figure), and the clamping and fixing unit and the attaching unit are also set in the second limiting slot 12 by sliding and limiting through the quick clamp.

[0079] The movement of the quick clamp can change the position of its moving end. By utilizing this feature, the clamping unit, the tight fixing unit, and the attaching unit can be moved away from the fixed rod 5, that is, part of the clamping unit, the tight fixing unit, and the attaching unit can be selectively used.

[0080] In this embodiment, the welding fixture for the slender rod 5 is used as follows: according to the length of the rod 5, a suitable number of clamping and fixing units, tight fixing units, and attaching units are selected, and they are arranged in place through their corresponding quick clamps.

[0081] Then, the positions of the clamping and fixing unit, the fastening and fixing unit, and the attaching unit on the fixing plate 1 are adjusted according to the welding area of ​​the rod 5 through the first limiting slot 11 and the second limiting slot 12, and the positioning top screw 43 is inserted into the insertion hole 451.

[0082] All the clamping jaw cylinders are controlled to open, and the rod 5 is placed in a predetermined fixed position. At this time, the cylindrical surface of the rod 5 fits with the attaching head 32 and the adsorption head 422.

[0083] Then all the clamping claw cylinders are controlled to merge so that the clamping head clamps and fixes the cylindrical surface of the rod 5. At the same time, the top screw 43 is positioned in the easily deformed area in the middle of the rod 5 to clamp the upper and lower surfaces of the rod 5 to reduce its deformation.

[0084] In this embodiment, the contact positions of the attaching head 32 , the adsorption head 422 and the rod 5 can be adjusted according to the welding area of ​​the rod 5 , which can be achieved by replacing the adsorption column 421 and the attaching head 32 .

[0085] Since the contact positions of the attachment head 32, the adsorption head 422 and the rod 5 are specifically selected, the welding area is not in the corresponding area during welding, and welding can be carried out smoothly. At the same time, when the positioning top screw 43 is in the welding area, the positioning top screw 43 will be directly welded to the rod 5. After the welding is completed, the positioning top screw 43 can be separated from the magnetic column 45.

[0086] Embodiment 2:

[0087] like Fig. 9 , 10 As shown, the only difference between this embodiment and embodiment 1 is that adsorption members 42 are provided on both sides of the first parallel filling cylinder, which can better adsorb the rod 5, reduce the force on the positioning screw 43, and further reduce the deformation of the rod 5.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A slender rod welding fixture, characterized in that: include: at least one clamping and fixing unit; At least one attachment unit, whose attachment area is located on the side of the outer cylindrical surface of the rod; At least one limiting unit, whose limiting area is located on the side of the outer cylindrical surface of the rod; The limiting unit comprises: A first parallel jaw cylinder is located on one side of the rod; The adsorption member is arranged on the slide plate of the first parallel jaw cylinder, and the adsorption surface faces the side of the outer cylindrical surface of the rod member and fits with the outer cylindrical surface of the rod member; At least two positioning jackscrews are respectively arranged on the two clamping plates of the first parallel clamping jaw cylinder, facing the outer cylindrical surface of the rod; when the first parallel clamping jaw cylinder is closed, the ends of the positioning jackscrews push against the outer cylindrical surface of the rod; the axis of the rod is located in the area surrounded by the contact points of the two ends of the positioning jackscrews and the rod, and the contact surface of the adsorption member and the rod.

2. The slender rod welding fixture according to claim 1, characterized in that: The clamping and fixing unit comprises: Second parallel jaw cylinder; Two clamping heads are respectively and oppositely arranged on the inner side surfaces of the two clamping plates of the second parallel clamping cylinder. When the second parallel clamping cylinder is closed, the two clamping heads relatively fix the outer cylindrical surface of the rod; the clamping heads are fixed to the clamping plates of the second parallel clamping cylinder by screws; the ends of the clamping heads are provided with groove surfaces that fit the cylindrical surfaces of the rods; the groove surfaces are provided with a plurality of protrusions that enhance the clamping force; the protrusions are strip-shaped, and the planes where the protrusions are located are perpendicular to the axis of the rod.

3. The slender rod welding fixture according to claim 1, characterized in that: The attaching unit comprises: An attachment seat is arranged on one side of the rod; The attaching head is connected to the attaching seat; the attaching head is magnetic and absorbs the rod; the contact surface between the attaching head and the rod is an arc groove surface, which fits the cylindrical surface of the rod.

4. The slender rod welding fixture according to claim 1, characterized in that: The adsorption member comprises: An adsorption column is fixedly connected to the slide plate of the first parallel clamping jaw cylinder; The adsorption head is connected to the end of the adsorption column and is located between the two clamping plates of the first parallel clamping cylinder; the adsorption head is magnetic and adsorbs the rod; the contact surface between the adsorption head and the rod is an arc groove shape and fits the cylindrical surface of the rod; the positioning top screw is directly opposite to the adsorption head.

5. The slender rod welding fixture according to claim 4, characterized in that: A notch groove is provided on the side of the slide plate of the first parallel clamping jaw cylinder; the opening of the notch groove faces the rod; and a threaded hole with an internal thread is provided at the bottom of the notch groove; The tail end of the adsorption column is located in the notch groove; the tail end of the adsorption column is limited by the notch groove; the tail end of the adsorption column is provided with a through hole facing the threaded hole; the adsorption column is fixed in the notch groove by screws.

6. The slender rod welding fixture according to claim 1, characterized in that: The clamping plate of the first parallel clamping jaw cylinder is provided with a receiving hole facing the rod; the tail end of the positioning top screw is located in the receiving hole and is restricted by the receiving hole.

7. The slender rod welding fixture according to claim 6, characterized in that: The receiving hole is penetrated; a bottom plate is arranged in the receiving hole; a spring is arranged between the bottom plate and the bottom of the receiving hole; and the tail end of the positioning top screw is in contact with the bottom plate.

8. The slender rod welding fixture according to claim 7, characterized in that: The outer side surface of the splint is provided with a barrel-shaped pipe fitting facing the accommodating hole, and the opening faces the accommodating hole; a spring is provided in the pipe fitting; the bottom plate is a magnetic column; the magnetic column is slidably limited by the inner groove of the pipe fitting and the accommodating hole; an insertion hole is provided at the exposed end of the magnetic column; the positioning top screw is inserted into the insertion hole and adsorbed by the magnetic column.

9. The slender rod welding fixture according to claim 1, characterized in that: It also includes a fixing plate; the fixing plate is provided with a first limiting slide groove and a second limiting slide groove parallel to the axis of the rod; the sliding limit setting of the clamping and fixing unit is in the first limiting slide groove; the sliding limit setting of the clamping and fixing unit and the attachment unit is in the second limiting slide groove.

10. The slender rod welding fixture according to claim 9, characterized in that: The clamping and fixing unit is set in the first limiting sliding groove by sliding and limiting the quick clamp, and the clamping and fixing unit and the attaching unit are also set in the second limiting sliding groove by sliding and limiting the quick clamp.

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