Reversible deformation presser for aluminum alloy welding

Abstract

The utility model relates to a reversible deformation presser for aluminum alloy welding. The presser comprises a base and two pairs of pressing mechanisms, the two pairs of pressing mechanisms are arranged in parallel, and the two pressing mechanisms in each pair of pressing mechanisms are oppositely installed on the top face of the base. The pressing mechanism comprises a pressing arm, a pressing screw rod and a pressing head; the pressing arm is of a right-angle structure and comprises a vertical extending structure and a transverse extending structure. The vertical extending structure is arranged in the vertical direction, the bottom end is fixedly connected to the top face of the base, and the top end is fixedly connected with the transverse extending structure. The tail end, facing the center of the base, of the transverse extending structure is in threaded fit with a pressing lead screw. The pressing lead screw extends in the vertical direction. A pressing head is detachably installed at the bottom end of the pressing lead screw, and a shouldered nut is arranged at the top end of the pressing lead screw. The presser can provide large pressure, and the pressing force requirement for reverse deformation of sleeper beam welding is met.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy welding of rail vehicles, in particular to an anti-deformation pressing device used for aluminum alloy welding. Background Art

[0002] In rail vehicles, the aluminum alloy body bolsters are greatly deformed after welding, and the workpiece needs to be reversed before welding: the middle position of the bolster is raised, and the two ends of the bolster are pressed down with a clamp.

[0003] The bolster itself is very strong, and compressing it down and deforming it requires a significant amount of force. Furthermore, the clamping device must withstand even greater deformation forces during welding. Conventional clamping methods cannot achieve such a high clamping force, so a counter-deformation clamping device is required, using a high-torque pneumatic wrench for compression. Utility Model Content

[0004] The utility model provides a compression device for aluminum alloy welding anti-deformation, which can meet the compression force requirement of bolster welding anti-deformation.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] A compression device for aluminum alloy welding with an anti-deformation function, comprising a base and two pairs of compression mechanisms; the two pairs of compression mechanisms are arranged in parallel, and the two compression mechanisms in each pair of compression mechanisms are relatively mounted on the top surface of the base;

[0007] The clamping mechanism includes a clamping arm, a clamping screw and a pressure head; the clamping arm is a right-angle structure, including a vertical extension structure and a horizontal extension structure; the vertical extension structure is arranged in the vertical direction, the bottom end is fixedly connected to the top surface of the base, and the top end is fixedly connected to the horizontal extension structure; the horizontal extension structure is threadedly engaged with the clamping screw at the end facing the center of the base; the clamping screw extends in the vertical direction; the bottom end of the clamping screw is detachably mounted with the pressure head, and the top end is provided with a shoulder nut.

[0008] Furthermore, it also includes a compression screw sleeve;

[0009] The end of the transversely extending structure is provided with a through hole extending in the vertical direction;

[0010] The compression screw sleeve is embedded in the through hole and is spirally matched with the compression screw rod.

[0011] Furthermore, the outer peripheral surface of the compression screw sleeve is provided with at least two blind holes distributed along its circumference;

[0012] The end of the transverse extension structure is provided with a first threaded hole corresponding one-to-one to the blind hole and penetrating the wall thickness;

[0013] A fastener is threadedly connected to the first threaded hole;

[0014] The inner end portion of the fastener passes through the first threaded hole and extends into the corresponding blind hole, thereby fixing the compression screw sleeve to the transverse extension structure.

[0015] Furthermore, the compression screw rod and the compression nut sleeve both adopt T-type threads and are made of bearing steel.

[0016] Furthermore, the top surface of the pressure head is provided with a second threaded hole;

[0017] The bottom end of the compression screw rod is threadedly connected to the second threaded hole.

[0018] Furthermore, it also includes two semi-annular glands;

[0019] The top surface of the pressure head is provided with a central groove;

[0020] The bottom end of the compression screw rod is provided with an insert that matches the shape of the central groove and a shaft neck with a diameter smaller than that of the insert;

[0021] The insert is accommodated in the central groove; the two semi-annular pressure covers are relatively arranged on both sides of the shaft neck and fixedly connected to the top of the pressure head to limit the insert in the central groove.

[0022] Furthermore, the top surface of the pressure head is provided with a plurality of third threaded holes evenly distributed along the circumference of the central groove;

[0023] The semi-annular gland is provided with a countersunk hole;

[0024] The semi-annular pressure cover is fixedly connected to the pressure head by using a countersunk screw that passes through the countersunk hole and is threadedly connected to the third threaded hole.

[0025] Furthermore, the vertical extension structure is composed of a vertical steel plate and a pressing base connected by two pins;

[0026] The clamping base includes a bottom plate and two parallel vertical plates; the bottom end of the bottom plate is detachably connected to the base; the bottom end of the vertical plate is fixedly connected to the top surface of the bottom plate; the vertical plate and the vertical steel plate are each provided with two pin holes positioned opposite to each other; the vertical steel plate is inserted between the two vertical plates, and the pin shaft is inserted into the pin holes of the vertical plate and the vertical steel plate.

[0027] Furthermore, the transverse extension structure is composed of a transverse steel plate and a steel sleeve; one end of the transverse steel plate is fixedly connected to the top end of the vertical steel plate, and the other end extends toward the other pressing mechanism and is welded to the steel sleeve;

[0028] The through hole is formed inside the steel sleeve and the first threaded holes are distributed circumferentially;

[0029] The compression screw sleeve is embedded in the steel sleeve.

[0030] Furthermore, one end of the pin shaft is provided with a reticulated knurling, and the other end is provided with a locking hole for inserting a cotter pin.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The clamp of the present invention is used to reverse deformation during welding. Two pairs of clamping mechanisms are installed on the top surface of the base. The clamping mechanisms are threaded with a clamping screw at the end facing the center of the base. The top of the clamping screw is provided with a shoulder nut. The shoulder nut can be matched with a pneumatic wrench socket. The pneumatic wrench is used to drive the shoulder nut to rotate, thereby clamping the two ends of the workpiece and achieving reverse deformation during welding. Therefore, the clamp can be tightened using a high-torque pneumatic wrench, and can apply a large clamping force.

[0033] 2. Both the compression screw and the compression screw sleeve adopt T-type thread and are made of bearing steel. The T-type thread has the characteristics of strong load-bearing capacity, and the bearing steel is wear-resistant. At the same time, the pressure arm and the compression screw sleeve are split structures. After wear, the compression screw sleeve can be replaced separately without replacing the pressure arm, saving materials and usage costs.

[0034] 3. The pressure head is installed on the bottom end of the compression screw through two butted semi-annular glands. The semi-annular gland is fixed to the pressure head by countersunk bolts. The gland can prevent the pressure head from detaching from the compression screw. At the same time, different pressure heads can be replaced through the gland. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1a This is a schematic diagram of the working state of the anti-deformation clamp for aluminum alloy welding of the utility model;

[0036] Figure 1b for Figure 1a Top view of the middle anti-deformation compactor;

[0037] Figure 2 It is a structural diagram of the pressing mechanism;

[0038] Figure 3 It is a cross-sectional view of the compression screw rod;

[0039] Figure 4 It is a structural diagram of the pressing base;

[0040] Figure 5 It is a structural schematic diagram of a vertical extension structure and a horizontal extension structure;

[0041] Figure 6 It is a structural diagram of the compression screw sleeve;

[0042] Figure 7 It is a structural diagram of the pressure head;

[0043] Figure 8 Schematic diagram of the structure of the semi-annular gland;

[0044] Figure 9 Schematic diagram of the structure of the compression screw;

[0045] Figure 10 It is a structural diagram of the pin shaft.

[0046] Among them, 1-base, 2-pressing mechanism, 3-pillar, 21-pressing arm, 22-pressing screw, 23-pressing head, 24-pressing screw sleeve, 25-semi-annular pressure cover, 26-fastener, 27-countersunk screw, 211-vertical steel plate, 212-pressing base, 213-pin, 214-horizontal steel plate, 215-steel sleeve, 221-embedded block, 222-shaft neck, 231-center groove, 232-third threaded hole, 241-blind hole, 251-countersunk hole, 2121-bottom plate, 2122-vertical plate. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] The embodiment of the utility model provides a kind of anti-deformation pressing device for aluminum alloy welding, such as Figure 1a and Figure 1b As shown in the structure, the clamping device includes a base 1 and two pairs of clamping mechanisms 2; the two pairs of clamping mechanisms 2 are arranged in parallel, and the two clamping mechanisms 2 in each pair of clamping mechanisms 2 are relatively installed on the top surface of the base 1, forming a space for placing workpieces such as a bolster 3 between the two pairs of clamping mechanisms 2;

[0049] like Figure 2 and Figure 3 As shown, the pressing mechanism 2 includes a pressing arm 21, a pressing screw 22, a pressing head 23, a pressing screw sleeve 24, and two semi-annular pressure covers 25; the pressing arm 21 is a right-angled structure, including a vertical extension structure and a horizontal extension structure;

[0050] The vertical extension structure is arranged in the vertical direction, with the bottom end fixedly connected to the top surface of the base 1 and the top end fixedly connected to the horizontal extension structure; Figure 2 、 Figure 4 and Figure 5 As shown, the vertical extension structure is composed of a vertical steel plate 211 and a clamping base 212 connected by two pin shafts 213; the clamping base 212 includes a bottom plate 2121 and two parallel vertical plates 2122; the bottom end of the bottom plate 2121 is detachably connected to the base 1; the bottom end of the vertical plate 2122 is fixedly connected to the top surface of the bottom plate 2121; the vertical plate 2122 and the vertical steel plate 211 are both provided with two pin holes in opposite positions; the vertical steel plate 211 is inserted between the two vertical plates 2122, and the pin shaft 213 is inserted into the pin holes of the vertical plate 2122 and the vertical steel plate 211; the vertical steel plate 211 and the clamping base 212 are connected by the pin shaft 213, which facilitates the disassembly and assembly between the vertical steel plate 211 and the clamping base 212. For example, when placing the pillow beam 3 or removing the pillow beam 3, the pin shaft 213 can be pulled out to open the pressing arm 21, which is convenient for taking and placing the pillow beam 3.

[0051] The end of the lateral extension structure toward the center of the base 1 is threadedly engaged with a compression screw 22; the compression screw 22 extends in the vertical direction; the end of the lateral extension structure is provided with a through hole extending in the vertical direction; the compression screw sleeve 24 is embedded in the through hole and screwed with the compression screw 22; the bottom end of the compression screw 22 is detachably mounted with a pressure head 23, and the top end is provided with a shoulder nut; Figure 5 and Figure 6 As shown, the transverse extension structure is composed of a transverse steel plate 214 and a steel sleeve 215; one end of the transverse steel plate 214 is fixedly connected to the top of the vertical steel plate 211, and the other end extends toward another clamping mechanism 2 and is welded to the steel sleeve 215; the transverse steel plate 214 and the vertical steel plate 211 can be an integral structure or can be connected by welding; a through hole is formed inside the steel sleeve 215 and first threaded holes are distributed circumferentially; the clamping screw sleeve 24 is embedded in the steel sleeve 215.

[0052] In order to realize the fixed installation of the compression screw sleeve 24, as Figure 3 、 Figure 5 and Figure 6 As shown, the outer circumference of the compression nut 24 is provided with at least two blind holes 241 distributed along its circumference. The end of the transverse extension structure is provided with a first threaded hole that corresponds one-to-one with the blind holes 241 and extends through the wall thickness. A fastener 26 is threadedly connected to the first threaded hole. The inner end of the fastener 26 passes through the first threaded hole and then extends into the corresponding blind hole 241, securing the compression nut 24 to the transverse extension structure. The fastener 26 can be a screw and prevents the compression nut 24 from rotating relative to the end of the transverse extension structure.

[0053] Based on the above embodiment, both the compression screw 22 and the compression nut 24 utilize T-shaped threads and are made of bearing steel. Their wear resistance can be enhanced by heat treatment after manufacture. Both the compression screw 22 and the compression nut 24 utilize T-shaped threads and are made of bearing steel. T-shaped threads have a strong load-bearing capacity, and bearing steel is wear-resistant. Furthermore, the pressure arm 21 and the compression nut 24 are separate structures. When worn, the compression nut 24 can be replaced separately, eliminating the need to replace the pressure arm 21, saving material and operating costs.

[0054] In the above-mentioned compactor, the fixed connection between the pressing head 23 and the compacting screw 22 can be implemented in the following ways:

[0055] Connection method 1: A second threaded hole is provided on the top surface of the pressing head 23; and the bottom end of the pressing screw 22 is threadedly connected to the second threaded hole.

[0056] Connection method 2: Figure 7 、 Figure 8 and Figure 9 As shown, the top surface of the pressure head 23 is provided with a central groove 231; the bottom end of the compression screw 22 is provided with an insert 221 that matches the shape of the central groove 231 and a shaft neck 222 with a smaller diameter than the insert 221; the insert 221 is accommodated in the central groove 231; two semi-annular glands 25 are oppositely arranged on either side of the shaft neck 222 and fixedly connected to the top of the pressure head 23, confining the insert 221 in the central groove 231. The top surface of the pressure head 23 is provided with a plurality of third threaded holes 232 evenly distributed along the circumference of the central groove 231; the semi-annular gland 25 is provided with a countersunk hole 251; the semi-annular gland 25 is fixedly connected to the pressure head 23 using a countersunk screw 27 that passes through the countersunk hole 251 and is threadedly connected to the third threaded hole 232.

[0057] The pressure head 23 is installed on the bottom end of the tightening screw 22 through two docking semi-annular pressure covers 25. The semi-annular pressure cover 25 is fixed to the pressure head 23 by countersunk bolts. The pressure cover can prevent the pressure head 23 from detaching from the tightening screw 22. At the same time, different pressure heads 23 can also be replaced through the pressure cover.

[0058] In order to facilitate the disassembly and assembly of the pin 213, Figure 10 As shown, one end of the pin shaft 213 is provided with a knurled pattern, and the other end is provided with a locking hole for inserting a cotter pin.

[0059] The above-mentioned clamping device is used for the reverse deformation of the pillow beam 3 welding. When in use, the pillow beam 3 and other workpieces are placed on the base 1, and the pressure head 23 is pressed on the two ends of the workpiece by rotating the clamping screw 22. The pressure head 23 is in a stationary state relative to the workpiece. The clamping screw 22 can continue to apply pressure by rotating relative to the pressure head 23 until a predetermined pressure is reached; two relatively arranged clamping mechanisms 2 are installed on the top surface of the base 1, and the clamping mechanism 2 is equipped with a clamping screw 22 at the end thread facing the center of the base 1. A shoulder nut is provided at the top of the clamping screw 22, and the shoulder nut can be matched with a pneumatic wrench socket. The pneumatic wrench is used to drive the shoulder nut to rotate to clamp the two ends of the workpiece to achieve reverse deformation of welding.

[0060] Therefore, the above-mentioned clamping device can be clamped using a high-torque pneumatic wrench and can apply a large clamping force.

[0061] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A counter-deformation clamp for aluminum alloy welding, characterized in that: It comprises a base and two pairs of pressing mechanisms; the two pairs of pressing mechanisms are arranged in parallel, and the two pressing mechanisms in each pair of pressing mechanisms are relatively installed on the top surface of the base; The clamping mechanism includes a clamping arm, a clamping screw and a clamping head; the clamping arm is a right-angled structure, including a vertical extension structure and a horizontal extension structure; the vertical extension structure is arranged in the vertical direction, the bottom end of which is fixedly connected to the top surface of the base, and the top end is fixedly connected to the horizontal extension structure; the horizontal extension structure is threadedly engaged with the clamping screw at the end facing the center of the base; the clamping screw extends in the vertical direction; the clamping head is detachably mounted on the bottom end of the clamping screw, and a shoulder nut is provided on the top end; Also included are two semi-annular glands; The top surface of the pressure head is provided with a central groove; The bottom end of the compression screw rod is provided with an insert that matches the shape of the central groove and a shaft neck with a diameter smaller than that of the insert; The insert is accommodated in the central groove; the two semi-annular pressure covers are relatively arranged on both sides of the shaft neck and fixedly connected to the top of the pressure head to limit the insert in the central groove.

2. The anti-deformation clamp for aluminum alloy welding according to claim 1, characterized in that: Also includes a compression screw sleeve; The end of the transversely extending structure is provided with a through hole extending in the vertical direction; The compression screw sleeve is embedded in the through hole and is spirally matched with the compression screw rod.

3. The anti-deformation clamp for aluminum alloy welding according to claim 2, characterized in that: The outer peripheral surface of the compression screw sleeve is provided with at least two blind holes distributed along its circumference; The end of the transverse extension structure is provided with a first threaded hole corresponding one-to-one to the blind hole and penetrating the wall thickness; A fastener is threadedly connected to the first threaded hole; The inner end portion of the fastener passes through the first threaded hole and extends into the corresponding blind hole, thereby fixing the compression screw sleeve to the transverse extension structure.

4. The anti-deformation pressing device for aluminum alloy welding according to claim 2, characterized in that: The compression screw rod and the compression screw sleeve both adopt T-type threads and are made of bearing steel.

5. The anti-deformation pressing device for aluminum alloy welding according to claim 3, characterized in that: The top surface of the pressure head is provided with a plurality of third threaded holes evenly distributed along the circumference of the central groove; The semi-annular gland is provided with a countersunk hole; The semi-annular pressure cover is fixedly connected to the pressure head by using a countersunk screw that passes through the countersunk hole and is threadedly connected to the third threaded hole.

6. The anti-deformation pressing device for aluminum alloy welding according to claim 5, characterized in that: The vertical extension structure is composed of a vertical steel plate and a pressing base connected by two pins; The clamping base includes a bottom plate and two parallel vertical plates; the bottom end of the bottom plate is detachably connected to the base; the bottom end of the vertical plate is fixedly connected to the top surface of the bottom plate; the vertical plate and the vertical steel plate are each provided with two pin holes positioned opposite to each other; the vertical steel plate is inserted between the two vertical plates, and the pin shaft is inserted into the pin holes of the vertical plate and the vertical steel plate.

7. The anti-deformation pressing device for aluminum alloy welding according to claim 6, characterized in that: The transverse extension structure is composed of a transverse steel plate and a steel sleeve; one end of the transverse steel plate is fixedly connected to the top of the vertical steel plate, and the other end extends toward the other clamping mechanism and is welded to the steel sleeve; The through hole is formed inside the steel sleeve and the first threaded holes are distributed circumferentially; The compression screw sleeve is embedded in the steel sleeve.

8. The anti-deformation pressing device for aluminum alloy welding according to claim 7, characterized in that: One end of the pin shaft is provided with a reticulated knurling, and the other end is provided with a locking hole for inserting a cotter pin.

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