Positioning clamp applied to plate welding

Abstract

The utility model belongs to the technical field of welding fixtures, and particularly relates to a positioning fixture applied to plate welding, which comprises a rotating mechanism, a limiting frame and a floating plate, the rotating mechanism drives the limiting frame to rotate, the floating plate is vertically and slidably mounted in the limiting frame, a plurality of spring telescopic rods are vertically mounted between the limiting frame and the floating plate, and the spring telescopic rods are movably mounted in the limiting frame. Positioning parts are fixedly connected to the two ends of the limiting frame respectively, a limiting part is arranged at the upper end of the limiting frame, a plate and two fixed mandrels are placed on the floating plate, and the plate has a first clamping state and a second clamping state; through mutual cooperation of the limiting frame, the floating plate, the spring telescopic rod, the positioning part and the limiting part, the plate can be installed and the position of the plate can be adjusted by pressing the floating plate, so that the whole clamp does not need to be disassembled again when the plate is welded for the second time, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, in particular to a positioning fixture used for plate welding. Background Art

[0002] The motor mounting plate of the rolling door is used to install the motor and the sprocket, so it is necessary to weld a fixed mandrel on the motor mounting plate and install the sprocket through the fixed mandrel.

[0003] During welding, the punched metal sheet and the fixed core shaft need to be fixed on the fixture, and the gun head of the welding gun is set between the fixed core shaft and the motor mounting plate. The motor drives the fixture and the metal sheet to rotate around the center line of the fixed core shaft, so that the fixed core shaft is welded to the motor mounting plate. However, some motor mounting plates are installed with two sprockets. Therefore, it is necessary to perform the welding of the fixed core shaft twice. Before the second welding, it is necessary to adjust the position of the metal sheet and re-disassemble the fixture. The re-disassembly and re-assembly process is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a positioning clamp used for plate welding. Through the mutual cooperation of a limit frame, a floating plate, a spring telescopic rod, a positioning part, and a limit part, the plate can be installed and the position of the plate can be adjusted by pressing the floating plate, so that when the plate is welded for the second time, there is no need to disassemble the entire clamp again, saving time and effort.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A positioning fixture used for plate welding, comprising a rotating mechanism, a limit frame and a floating plate, wherein the rotating mechanism drives the limit frame to rotate, the floating plate is vertically slidably installed in the limit frame, a plurality of spring telescopic rods are vertically installed between the limit frame and the floating plate, the two ends of the limit frame are respectively fixedly connected with positioning parts, the upper end of the limit frame is provided with a limit part, a plate and two fixed mandrels are placed on the floating plate, and the plate includes a first clamping state and a second clamping state;

[0007] When the plate is in the first clamping state, one end of the plate rests on one of the positioning parts, and the center line of one of the fixed core shafts is collinear with the rotation center line of the limit frame. When the plate is in the second clamping state, the other end of the plate rests on another positioning part, and the center line of the other fixed core shaft is collinear with the rotation center line of the limit frame.

[0008] Working principle: Before welding, press the floating plate downward so that there is a gap between the floating plate and the limiting part, push the plate along the gap into the space between the floating plate and the limiting part, and position it through the positioning part. After releasing the floating plate, due to the elasticity of the spring telescopic rod, the floating plate and the plate body are pressed tightly under the limiting part. At this time, the plate is in the first clamping state, and the fixed mandrel is placed in the positioning hole formed after punching the plate. The gun head of the welding gun is in contact with the fixed mandrel and the plate, and the rotating mechanism drives the clamp and the plate to rotate to complete the first welding. After the first welding is completed, press the plate downward and push it toward the positioning part at the other end. After the plate is aligned with the positioning part, release the plate. At this time, the plate is in the second clamping state and can be welded for the second time.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] Through the cooperation of the limit frame, floating plate, spring telescopic rod, positioning part and limit part, the plate can be installed and the position of the plate can be adjusted by pressing the floating plate, so that when the plate is welded for the second time, there is no need to disassemble the entire fixture again, saving time and effort.

[0011] As a preferred embodiment of the present invention, each group of the positioning parts includes two positioning blocks, and the two positioning blocks in the same group are respectively arranged on both sides of the limiting frame.

[0012] Beneficial effect: By setting four positioning blocks, the plate is assisted in positioning by two positioning blocks in the same group, which makes it convenient for operators to accurately install the plate.

[0013] As a preferred embodiment of the utility model, the limiting part includes two groups of limiting blocks, the two groups of limiting blocks are fixedly connected to the upper end of the limiting frame at intervals, the number of the limiting blocks in each group is two, and the two limiting blocks in the same group are respectively located on both sides of the limiting frame;

[0014] A sliding groove is vertically provided at the lower end of each of the limit blocks, a tension spring is vertically arranged in each of the sliding grooves, and a stopper is fixedly connected to the lower end of each of the tension springs;

[0015] When the plate is in the first clamping state, one end of the plate abuts against two positioning blocks in one group, and the other end of the plate abuts against two stop blocks in one group;

[0016] When the plate is in the second clamping state, one end of the plate abuts against two positioning blocks of another group, and the other end of the plate abuts against two stop blocks of another group.

[0017] Beneficial effect: After one end of the plate is aligned by the positioning block, the block blocks the other end of the plate, making it difficult for the plate to shift. When adjusting the position of the plate for the second welding, the plate and the floating plate are pressed down so that the upper end surface of the plate is lower than the lower end surface of the block, and it is moved to the other end of the floating plate. The block above the plate is pushed into the sliding groove, and the block at one end of the plate blocks the plate, so that the clamping effect of the clamp is better.

[0018] As a preferred embodiment of the utility model, each of the spring telescopic rods includes an upper cylinder, a lower cylinder and a compression spring, the upper cylinder is fixedly connected to the lower end surface of the floating plate, the lower cylinder is fixedly connected to the inner bottom wall of the limit frame, the upper cylinder is vertically slidably connected to the lower cylinder, and the compression spring is vertically installed in the upper cylinder and the lower cylinder.

[0019] Beneficial effect: The compression spring is limited by setting the upper cylinder and the lower cylinder, so that the floating plate can only move vertically up and down, avoiding the plate from tilting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a plate and a fixed mandrel in an embodiment of a positioning fixture for plate welding of the utility model;

[0021] Figure 2 It is a structural schematic diagram of an embodiment of the positioning fixture of the utility model used for plate welding installed on a support platform;

[0022] Figure 3 It is a structural schematic diagram of an embodiment of the positioning fixture of the utility model applied to plate welding;

[0023] Figure 4 The utility model Figure 3 A magnified view of the structure at A;

[0024] Figure 5 It is a cross-sectional view of an embodiment of the positioning fixture of the utility model applied to plate welding.

[0025] The reference numerals include: plate 1, fixed core shaft 11, positioning hole 12, support platform 2, limit frame 3, floating plate 4, upper cylinder 51, lower cylinder 52, compression spring 53, positioning part 6, positioning block 61, limit part 7, limit block 71, tension spring 72, and stop block 73. DETAILED DESCRIPTION

[0026] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0027] In the description of the present application, the terms "first", "second", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] See also Figure 1 and Figure 2 As shown, this embodiment discloses a positioning fixture for welding a plate 1, comprising a rotating mechanism, a limit frame 3 and a floating plate 4, wherein the rotating mechanism drives the limit frame 3 to rotate, and the floating plate 4 is vertically slidably installed in the limit frame 3, and a plurality of spring telescopic rods are vertically installed between the limit frame 3 and the floating plate 4, and the two ends of the limit frame 3 are respectively fixedly connected with positioning parts 6, and the upper end of the limit frame 3 is provided with a limit part 7, and the plate 1 and two fixed mandrels 11 are placed on the floating plate 4, and the plate 1 includes a first clamping state and a second clamping state;

[0029] When the plate 1 is in the first clamping state, one end of the plate 1 rests on one of the positioning portions 6, and the center line of one of the fixed core shafts 11 is collinear with the rotation center line of the limit frame 3. When the plate 1 is in the second clamping state, the other end of the plate 1 rests on another positioning portion 6, and the center line of the other fixed core shaft 11 is collinear with the rotation center line of the limit frame 3.

[0030] In this embodiment, the plate 1 has been bent and punched to form side edges and two positioning holes 12. Figure 1 The rotating mechanism adopts a motor, which is arranged in the support platform 2, and the output shaft of the motor is fixedly connected to the limit frame 3.

[0031] Among them, see Figure 3 Each group of the positioning parts 6 includes two positioning blocks 61, and the two positioning blocks 61 of the same group are respectively arranged on both sides of the limit frame 3; by setting four positioning blocks 61, the plate 1 is assisted in positioning by the two positioning blocks 61 of the same group, which is convenient for the operator to accurately install the plate 1.

[0032] Among them, see Figure 3 and Figure 4The limiting portion 7 includes two groups of limiting blocks 71, and the two groups of limiting blocks 71 are fixedly connected to the upper end of the limiting frame 3 at intervals. The number of limiting blocks 71 in each group is two, and the two limiting blocks 71 in the same group are respectively located on both sides of the limiting frame 3; a sliding groove is vertically opened at the lower end of each limiting block 71, and a tension spring 72 is vertically arranged in each sliding groove, and a stopper 73 is fixedly connected to the lower end of each tension spring 72; when the plate 1 is in the first clamping state, one end of the plate 1 rests on the two positioning blocks 61 of one group, and the other end of the plate 1 rests on the two stoppers 73 of one group; the plate When the plate 1 is in the second clamping state, one end of the plate 1 is pressed against the two positioning blocks 61 of the other group, and the other end of the plate 1 is pressed against the two stoppers 73 of the other group; after one end of the plate 1 is aligned by the positioning block 61, the stopper 73 blocks the other end of the plate 1, so that the plate 1 is not easily offset. When the position of the plate 1 is adjusted for the second welding, the plate 1 and the floating plate 4 are pressed down so that the upper end surface of the plate 1 is lower than the lower end surface of the stopper 73, and the plate 1 is moved to the other end of the floating plate 4. The stopper 73 above the plate 1 is pushed into the sliding groove, and the stopper 73 at one end of the plate 1 blocks the plate 1, so that the clamping effect of the clamp is better.

[0033] Among them, see Figure 5 Each of the spring telescopic rods includes an upper cylinder 51, a lower cylinder 52 and a compression spring 53. The upper cylinder 51 is fixedly connected to the lower end surface of the floating plate 4, and the lower cylinder 52 is fixedly connected to the inner bottom wall of the limit frame 3. The upper cylinder 51 and the lower cylinder 52 are vertically slidably connected, and the compression spring 53 is vertically installed in the upper cylinder 51 and the lower cylinder 52. The compression spring 53 is limited by setting the upper cylinder 51 and the lower cylinder 52, so that the floating plate 4 can only move vertically up and down to prevent the plate 1 from tilting.

[0034] Specific use (working) process:

[0035] Before welding, the floating plate 4 is pressed downward so that there is a gap between the floating plate 4 and the limiting portion 7, and the plate 1 is pushed into the floating plate 4 and the limiting portion 7 along the gap, ensuring that the upper end surface of the plate 1 is lower than the lower end surface of the stopper 73 during the pushing process. After the plate 1 passes the first stopper 73, the force applied to the floating plate 4 is reduced. Due to the elasticity of the spring telescopic rod, the floating plate 4 and the plate 1 are pushed toward the limit block 71, and the stopper 73 above the plate 1 slides into the sliding groove, and the plate 1 is continued to be pushed until the plate 1 is blocked by the second stopper 73. At this time, the corresponding positioning block 61 and the stopper 73 fix the plate 1 in the first clamping state, and the fixed mandrel 11 is placed in the positioning hole 12 formed after punching the plate 1. The gun head of the welding gun contacts with the fixed mandrel 11 and the plate 1, and the rotating mechanism drives the clamp and the plate 1 to rotate, completing the first welding.

[0036] After the first welding is completed, the plate 1 is pressed downward and pushed toward the positioning portion 6 at the other end to ensure that the upper end surface of the plate 1 is lower than the lower end surface of the block 73 during the pushing process. After the plate 1 passes through the corresponding block 73, the force applied to the floating plate 4 is reduced. Due to the elasticity of the spring telescopic rod, the floating plate 4 and the plate 1 are pushed toward the limit block 71, and the block 73 above the plate 1 slides into the sliding groove, and the plate 1 continues to be pushed until the plate 1 is blocked by the positioning block 61 at the other end, and the block 73 at the other end of the plate 1 loses its obstruction and slides out of the sliding groove due to the elastic force of the compression spring 53, thereby limiting the plate 1.

[0037] Through the cooperation of the limit frame 3, the floating plate 4, the spring telescopic rod, the positioning part 6, and the limit part 7, the plate 1 can be installed and the position of the plate 1 can be adjusted by pressing the floating plate 4, so that when the plate 1 is welded for the second time, there is no need to disassemble the entire fixture again, saving time and effort.

[0038] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A positioning fixture for plate welding, comprising a rotating mechanism, characterized in that: It also includes a limit frame and a floating plate, the rotating mechanism drives the limit frame to rotate, the floating plate is vertically slidably installed in the limit frame, a plurality of spring telescopic rods are vertically installed between the limit frame and the floating plate, both ends of the limit frame are respectively fixedly connected with positioning parts, the upper end of the limit frame is provided with a limit part, a plate and two fixed core shafts are placed on the floating plate, and the plate includes a first clamping state and a second clamping state; When the plate is in the first clamping state, one end of the plate rests on one of the positioning parts, and the center line of one of the fixed core shafts is collinear with the rotation center line of the limit frame. When the plate is in the second clamping state, the other end of the plate rests on another positioning part, and the center line of the other fixed core shaft is collinear with the rotation center line of the limit frame.

2. The positioning fixture for plate welding according to claim 1 is characterized in that: Each group of the positioning parts includes two positioning blocks, and the two positioning blocks in the same group are respectively arranged on two sides of the limiting frame.

3. The positioning fixture for plate welding according to claim 2 is characterized in that: The limiting part comprises two groups of limiting blocks, the two groups of limiting blocks are fixedly connected to the upper end of the limiting frame at intervals, each group of limiting blocks has two limiting blocks, and the two limiting blocks in the same group are respectively located on both sides of the limiting frame; A sliding groove is vertically provided at the lower end of each of the limit blocks, a tension spring is vertically arranged in each of the sliding grooves, and a stopper is fixedly connected to the lower end of each of the tension springs; When the plate is in the first clamping state, one end of the plate abuts against two positioning blocks in one group, and the other end of the plate abuts against two stop blocks in one group; When the plate is in the second clamping state, one end of the plate abuts against two positioning blocks of another group, and the other end of the plate abuts against two stop blocks of another group.

4. The positioning fixture for plate welding according to claim 1 is characterized in that: Each of the spring telescopic rods includes an upper cylinder, a lower cylinder and a compression spring. The upper cylinder is fixedly connected to the lower end surface of the floating plate, the lower cylinder is fixedly connected to the inner bottom wall of the limit frame, the upper cylinder is vertically slidably connected to the lower cylinder, and the compression spring is vertically installed in the upper cylinder and the lower cylinder.

Images