A fixture for welding metal parts of electromechanical equipment

Abstract

This application discloses a welding fixture for metal parts of electromechanical equipment, belonging to the field of welding technology. It includes a housing with a welding head on its inner side and an H-shaped fixing plate fixedly installed inside the housing. Motors are installed on both sides of the housing. By starting the motors, the lead screw rotates, pushing the side plates towards the center and causing the clamping plates to move synchronously. When the clamping force exceeds the elastic coefficient of spring one, the clamping plates push hydraulic rod one inward, while hydraulic rods two and three extend outward. Hydraulic rod two pushes a friction block towards a fixed wheel. Upon approaching, under the action of the friction block, the fixed wheel mounted on the lead screw stops rotating, the lead screw stops rotating, and the clamping plates stop clamping. Simultaneously, when hydraulic rod two pushes the friction block, hydraulic rod three extends outward, releasing the rotating block's limit and causing rotation. A bell sounds to remind the operator of over-clamping and to avoid excessive clamping force that could damage the workpiece surface.

Description

Technical Field

[0001] This application relates to the field of welding technology, and more specifically, to a fixture for welding metal parts of electromechanical equipment. Background Technology

[0002] Electromechanical equipment (such as motors, reducers, pumps, compressors, machine tools, etc.) is assembled from a large number of metal parts, many of which require welding for fixed connection. Welding quality directly affects the operational accuracy, vibration and noise levels, and service life of the electromechanical equipment. During the welding process, the positioning accuracy of the parts, clamping stability, and control of welding deformation are the core factors determining weld quality, and welding fixtures are the key process equipment for achieving these requirements.

[0003] In existing technology, the clamping force is triggered by the workpiece's gravity. The clamping force is determined entirely by the workpiece's own weight amplified by a set of mechanical levers. For workpieces with large weight differences, heavy workpieces may cause excessive clamping force, which may damage the workpiece surface (especially painted or precision-machined parts). Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a fixture for welding metal parts of electromechanical equipment, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this application provides a fixture for welding metal parts of electromechanical equipment, including a housing. A welding head is provided on the inner side of the housing. An H-shaped fixing plate is fixedly installed inside the housing. Motors are located on both sides of the housing. The output shaft of each motor is connected to a lead screw. A side plate is rotatably connected to the left end of the lead screw. An alarm device is installed inside the housing. The alarm device includes a spring fixedly installed on the left side of the side plate, a fixed wheel mounted on the right side of the lead screw, a fixing block fixedly installed on the right side of the H-shaped fixing plate, and a hydraulic chamber fixedly installed on the right side of the H-shaped fixing plate. A clamping plate is fixedly installed on the right side of the hydraulic chamber. A hydraulic rod is slidably connected to a piston at one end inside the hydraulic chamber. A pressing plate is fixedly installed on the right side of the hydraulic rod. A spring is fixedly installed on the left side of the pressing plate. A hydraulic rod is slidably connected to a piston at the other end inside the hydraulic chamber. A friction block is fixedly installed on the right side of the hydraulic rod. A hydraulic rod is slidably connected to a piston at the other end inside the hydraulic chamber. A limit rod is fixedly installed on the left side of the hydraulic rod. A torsion spring is fixedly installed on the right side of the fixed block. A rotating block is fixedly installed on the right side of the torsion spring. A rotating bell is fixedly installed on the surface of the rotating block.

[0006] Preferably, the outer side of the rotating block is provided with a groove, which cooperates with the limiting rod.

[0007] Preferably, the H-shaped fixing plate has an opening on its right side, which engages with the rack on the outside of the lead screw.

[0008] Preferably, the friction block has an arc-shaped contact surface on the side facing the fixed wheel, and the side plate and the right side of the H-shaped fixed plate have a through hole, which matches the hydraulic chamber.

[0009] Preferably, the top of the H-shaped fixing plate is equipped with a cleaning device for rotating and cleaning impurities.

[0010] Preferably, the cleaning device includes a hollow block fixedly installed on the left side of the fixed wheel, a transmission wheel rotatably installed on the right side of the H-shaped fixed plate, a second rotating shaft passing through and rotatably installed on the right side of the H-shaped fixed plate, and a second pulley rotatably installed on the right side of the H-shaped fixed plate. A first pulley is fixedly installed on the left side of the hollow block, and the first and second pulleys are connected by a belt drive. A first rotating shaft is fixedly installed on the right side of the second pulley. A transmission belt is provided on the outer side of the first rotating shaft. A first gear is assembled in the middle of the first rotating shaft, and a second gear is assembled in the middle of the second rotating shaft. A cleaning roller is assembled on the left side of the second rotating shaft.

[0011] Preferably, the transmission wheel and gear one mesh with each other, and gear two and transmission wheel mesh with each other.

[0012] Preferably, the interior of the housing is equipped with a partition device for separating the two side panels during the welding process.

[0013] Preferably, the partition device includes a fixed base fixedly installed on the inner wall of the box, a hydraulic chamber two fixedly installed on the inner wall of the box, a bimetallic strip fixedly installed on the right side of the fixed base, a pressure-activated switch fixedly installed on the right side of the fixed base, an electric push rod fixedly installed at the bottom of the fixed base, a hydraulic rod four slidably connected to a piston at one end of the interior of the hydraulic chamber two, a hydraulic rod five slidably connected to a piston at the other end of the interior of the hydraulic chamber two, and a hydraulic rod six slidably connected to a piston at the other end of the interior of the hydraulic chamber two.

[0014] Preferably, the pressure-activated switch is electrically connected to the electric push rod, and the coefficient of thermal expansion of the upper layer of the bimetallic strip is greater than that of the lower layer.

[0015] The advantages of this application are: (1) This application starts the motor, drives the lead screw to rotate, pushes the two side plates to move closer to the middle, and drives the two clamping plates to move synchronously. When the clamping force is too large and exceeds the elastic coefficient of spring one, the clamping plate pushes hydraulic rod one to retract inward, and hydraulic rod two and hydraulic rod three to stretch outward. Hydraulic rod two pushes the friction block to move closer to the fixed wheel. When they move closer, under the action of the friction block, the fixed wheel assembled on the lead screw stops rotating, the lead screw stops rotating, and the clamping plate stops clamping. At the same time, when hydraulic rod two pushes the friction block, hydraulic rod three stretches outward to release the limit of the rotating block and rotates. The bell rings to remind the operator to clamp too much and avoid excessive clamping force, which may damage the surface of the workpiece.

[0016] (2) The fixed wheel mounted on the lead screw rotates, which drives the pulley to rotate. Under the power transmission, the shaft rotates, which drives the conveyor belt to rotate. Under the action of the transmission wheel, the cleaning roller also rotates in the opposite direction of the conveyor belt. This cleaning mechanism can effectively avoid the risk of equipment moving parts jamming and circuit short circuit caused by the accumulation of impurities, reduce the production interruption caused by machine shutdown for cleaning, reduce the dust concentration in the workshop, improve the operating environment, greatly increase the continuous running time of the equipment, and improve the overall utilization rate of the equipment.

[0017] (3) This application incorporates a hydraulic chamber. During continuous welding of long weld seams, the high temperature generated during welding causes the bimetallic strip to bend due to heat, which in turn squeezes and activates the electric push rod to push hydraulic rod four, causing hydraulic rods five and six to extend to both sides, reducing the clamping force of the side plate on the elevator car gantry beam. This measure can avoid the huge welding thermal stress caused by the obstruction of local thermal expansion of the workpiece during continuous welding of long weld seams, thereby reducing the occurrence of cracks or deformation in the weld seam area. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the alarm device structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the alarm device structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the alarm device structure of the present invention. Figure 3 ; Figure 6 This is a schematic diagram of the cleaning device structure of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the cleaning device structure of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the cleaning device structure of the present invention. Figure 3 ; Figure 9 This is a schematic diagram of the separation device structure of the present invention.

[0019] In the above image, 100. Housing; 200. Welding head; 300. H-shaped fixing plate; 400. Motor; 500. Lead screw; 600. Side plate; 700. Alarm device; 701. Spring 1; 702. Clamping plate; 703. Hydraulic chamber 1; 704. Hydraulic rod 1; 705. Hydraulic rod 2; 706. Hydraulic rod 3; 707. Extrusion plate; 708. Spring 2; 709. Friction block; 710. Fixed wheel; 711. Limiting rod; 712. Rotating block; 713. Torsion spring; 714. Fixed block; 715. Rotating bell; 800. Cleaning device; 801. Conveyor belt; 802. Hollow block; 803. Pulley 1; 804. Pulley 2; 805. Belt; 806. Shaft 1; 807. Gear 1; 808. Drive wheel; 809. Gear 2; 810. Shaft 2; 811. Cleaning roller; 900. Separating device; 901. Fixing base; 902. Bimetallic strip; 903. Pressure start switch; 904. Electric push rod; 905. Hydraulic chamber two; 906. Hydraulic rod four; 907. Hydraulic rod five; 908. Hydraulic rod six. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1, see Figures 1-5This embodiment provides a fixture for welding metal parts of electromechanical equipment, including a housing 100. A welding head 200 is provided on the inner side of the housing 100 for performing welding operations. An H-shaped fixing plate 300 is fixedly installed inside the housing 100. An opening is provided on the right side of the H-shaped fixing plate 300. Motors 400 are provided on both sides of the housing 100. The output shaft of the motor 400 is connected to a lead screw 500. The opening cooperates with the rack on the outer side of the lead screw 500, thus providing guide support for the lead screw 500. Hydraulic lines and limit switches are provided through the opening. The component provides an installation channel. The left end of the lead screw 500 is rotatably connected to a side plate 600. The side plate 600 and the right side of the H-shaped fixing plate 300 have through holes. An alarm device 700 is installed inside the housing 100. The alarm device 700 includes a spring 701 fixedly installed on the left side of the side plate 600, a fixing wheel 710 mounted on the right side of the lead screw 500, a fixing block 714 fixedly installed on the right side of the H-shaped fixing plate 300, and a hydraulic chamber 703 fixedly installed on the right side of the H-shaped fixing plate 300. The through holes match the hydraulic chamber 703. A clamping plate 702 is fixedly installed on the right side of spring 701. The elastic deformation of spring 701 absorbs the clamping impact force, avoiding damage to the workpiece surface caused by rigid contact. Inside hydraulic chamber 703, a piston slides to one end of hydraulic rod 704. A pressing plate 707 is fixedly installed on the right side of hydraulic rod 704. A spring 708 is fixedly installed on the left side of pressing plate 707. Inside hydraulic chamber 703, a piston slides to the other end of hydraulic rod 705. A friction block 709 is fixedly installed on the right side of hydraulic rod 705. The friction block 709 has an arc-shaped contact surface on the side facing the fixed wheel 710. The piston at the other end of the hydraulic chamber 703 is slidably connected to the hydraulic rod 706. The left side of the hydraulic rod 706 is fixedly installed with a limit rod 711. The right side of the fixed block 714 is fixedly installed with a torsion spring 713. The right side of the torsion spring 713 is fixedly installed with a rotating block 712. The outer side of the rotating block 712 has a groove that cooperates with the limit rod 711. A bell 715 is fixedly installed on the surface of the rotating block 712. The bell 715 produces a warning sound when it rotates.

[0027] In practical use, the above-mentioned equipment is started by starting the motor 400, which drives the lead screw 500 on the output shaft to rotate. During the rotation of the lead screw 500, its outer rack closely engages with the opening on the right side of the H-shaped fixed plate 300, ensuring smooth and precise rotation. As the lead screw 500 rotates, it pushes the two side plates 600 together, thereby causing the clamping plates 702 mounted on the side plates 600 to move synchronously. During the clamping of the workpiece, as the clamping force gradually increases, once it exceeds the elastic coefficient of spring 701, the clamping plate 702 can no longer move inward. At this point, it will push the hydraulic rod 704 to contract into the hydraulic chamber 703. The contraction of the hydraulic rod 704 triggers a series of chain reactions, compressing the hydraulic oil inside the hydraulic chamber 703, which in turn pushes the hydraulic rods 705 and 706 outward. When hydraulic rod 2 705 is stretched outward, the friction block 709 fixedly installed on its right side gradually moves closer to the fixed wheel 710 mounted on the lead screw 500. Because the friction block 709 has an arc-shaped contact surface facing the fixed wheel 710, the two can fit tightly together, generating sufficient friction. Under the action of this friction, the fixed wheel 710 stops rotating, and consequently, the lead screw 500 also stops rotating. The clamping plate 702 then stops clamping, effectively preventing damage to the workpiece surface due to excessive clamping force. Simultaneously, as hydraulic rod 2 705 pushes the friction block 709 closer to the fixed wheel 710, hydraulic rod 3 706 is also stretched outward, and the limiting rod 711 fixedly installed on its left side moves accordingly. Originally, the limiting rod 711 cooperated with the groove on the outer side of the rotating block 712, limiting the rotating block 712. Now, the movement of the limiting rod 711 releases the limitation on the rotating block 712. The rotating block 712 rotates under the action of the torsion spring 713, and the bell 715 fixedly installed on the surface of the rotating block 712 makes a sound. The crisp bell sound quickly reminds the operator that the clamping is too strong, so that appropriate measures can be taken in time, further ensuring the safety of the workpiece and the welding quality.

[0028] Example 2, see Figures 1-8Based on Embodiment 1, this embodiment has a cleaning device 800 for rotating and cleaning impurities mounted on the top of the H-shaped fixed plate 300. This device can clean impurities such as welding slag and metal chips generated during welding operations. The cleaning device 800 includes a hollow block 802 fixedly installed on the left side of the fixed wheel 710, a transmission wheel 808 rotatably installed on the right side of the H-shaped fixed plate 300, a second rotating shaft 810 penetrating and rotatably installed on the right side of the H-shaped fixed plate 300, and a second pulley 804 rotatably installed on the right side of the H-shaped fixed plate 300. A first pulley 804 is fixedly installed on the left side of the hollow block 802. 03. Pulley 1 803 and Pulley 2 804 are connected by belt 805. Shaft 1 806 is fixedly installed on the right side of Pulley 2 804. A conveyor belt 801 is provided on the outer side of shaft 1 806 for conveying cleaned impurities to the collection area. Gear 1 807 is assembled in the middle of shaft 1 806. Power reversal is achieved by meshing with transmission wheel 808. Transmission wheel 808 and gear 1 807 mesh with each other. Gear 2 809 is assembled in the middle of shaft 2 810. Gear 2 809 and transmission wheel 808 mesh with each other. Cleaning roller 811 is assembled on the left side of shaft 2 810.

[0029] In practical use, when the fixed wheel 710 mounted on the lead screw 500 starts to rotate, the fixed wheel 710 drives the hollow block 802 on the left side to rotate synchronously, and the pulley 803 fixedly mounted on the hollow block 802 also rotates accordingly. Since the pulley 803 and the second pulley 804 are connected by a belt 805, the second pulley 804 starts to rotate under the drive of the belt 805, which in turn drives the rotating shaft 806 fixedly mounted on its right side to rotate. When the rotating shaft 806 rotates, the conveyor belt 801 on its outer side starts to operate, realizing the transfer of materials. At the same time, the gear 807 in the middle of the rotating shaft 806 also rotates. Since the transmission wheel 808 and the gear 807 mesh with each other, the transmission wheel 808 starts to rotate under the drive of the gear 807. Furthermore, because the gear 809 and the transmission wheel 808 in the middle of the rotating shaft 810 mesh with each other, the gear 809 begins to rotate under the drive of the transmission wheel 808, which in turn drives the rotating shaft 810 to rotate. The cleaning roller 811 mounted on the left side of the rotating shaft 810 begins to rotate under the drive of the rotating shaft 810, and the direction of rotation is opposite to that of the conveyor belt 801. During the welding process, the cleaning roller 811 can promptly clean away the impurities generated, avoiding the accumulation of impurities that affect the service life of the equipment and the working environment, thereby improving the continuity of production and the utilization rate of the equipment.

[0030] Example 3, see Figures 1-9Based on Embodiment 1, this embodiment includes a partition device 900 inside the housing 100 for separating the two side panels 600 during welding. The partition device 900 includes a fixing seat 901 fixedly installed on the inner wall of the housing 100 and a hydraulic chamber 905 fixedly installed on the inner wall of the housing 100. A bimetallic strip 902 is fixedly installed on the right side of the fixing seat 901, and a pressure-activated switch 903 is fixedly installed on the right side of the fixing seat 901. The coefficient of thermal expansion of the upper layer of the bimetallic strip 902 is greater than that of the lower layer. When heated, it bends and squeezes the pressure switch 903. An electric push rod 904 is fixedly installed at the bottom of the fixed base 901. The pressure switch 903 is electrically connected to the electric push rod 904. A hydraulic rod 906 is slidably connected to the piston at one end of the hydraulic chamber 2 905. A hydraulic rod 907 is slidably connected to the piston at the other end of the hydraulic chamber 2 905. A hydraulic rod 908 is slidably connected to the piston at the other end of the hydraulic chamber 2 905, and is symmetrically arranged with hydraulic rod 907.

[0031] In practical use, during the welding process, if long weld seams are continuously welded, the high temperature generated during welding will cause the bimetallic strip 902 in the separating device 900 to bend due to the difference in thermal expansion coefficients between the upper and lower layers of the bimetallic strip 902. This causes the bimetallic strip 902 to bend towards the lower layer with the smaller thermal expansion coefficient, squeezing the trigger contact of the pressure switch 903. After the pressure switch 903 is squeezed, the electric push rod 904 is activated. The piston rod of the electric push rod 904 extends and pushes the hydraulic rod four 906 to make piston movement in the hydraulic chamber two 905. When the hydraulic rod four 906 is pushed inward, it synchronously drives the hydraulic rod five 907 and hydraulic rod six 908 to extend to both sides through the internal three-way oil circuit. This pushes the side plates 600 on both sides to move horizontally, reducing the clamping force and avoiding the huge welding thermal stress caused by the obstruction of local thermal expansion of the workpiece during continuous welding of long weld seams. This reduces the occurrence of cracks or deformation in the weld seam area.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fixture for welding metal parts of electromechanical equipment, comprising a housing, characterized in that, The inner side of the housing is provided with a welding head. An H-shaped fixing plate is fixedly installed inside the housing. Motors are provided on both sides of the housing. The output shaft of the motor is connected to a lead screw. The left end of the lead screw is rotatably connected to a side plate. An alarm device is assembled inside the housing. The alarm device includes a spring 1 fixedly installed on the left side of the side plate, a fixed wheel assembled on the right side of the lead screw, a fixing block fixedly installed on the right side of the H-shaped fixing plate, and a hydraulic chamber 1 fixedly installed on the right side of the H-shaped fixing plate. A clamping plate is fixedly installed on the right side of the spring 1. A hydraulic rod 1 is slidably connected to a piston at one end of the hydraulic chamber 1. A pressing plate is fixedly installed on the right side of the hydraulic rod 1. A spring 2 is fixedly installed on the left side of the pressing plate. A hydraulic rod 2 is slidably connected to a piston at the other end of the hydraulic chamber 1. A friction block is fixedly installed on the right side of the hydraulic rod 2. A hydraulic rod 3 is slidably connected to a piston at the other end of the hydraulic chamber 1. A limit rod is fixedly installed on the left side of the hydraulic rod 3. A torsion spring is fixedly installed on the right side of the fixing block. A rotating block is fixedly installed on the right side of the torsion spring. A rotating bell is fixedly installed on the surface of the rotating block.

2. The fixture for welding metal parts of electromechanical equipment according to claim 1, characterized in that, The outer side of the rotating block has a groove, which cooperates with the limiting rod.

3. A fixture for welding metal parts of electromechanical equipment according to claim 1, characterized in that, An opening is provided on the right side of the H-shaped fixing plate, and the opening engages with the rack on the outside of the lead screw.

4. A fixture for welding metal parts of electromechanical equipment according to claim 1, characterized in that, The friction block has an arc-shaped contact surface on the side facing the fixed wheel, and the side plate and the right side of the H-shaped fixed plate have through holes that match the hydraulic chamber.

5. A fixture for welding metal parts of electromechanical equipment according to claim 1, characterized in that, The top of the H-shaped fixing plate is equipped with a cleaning device for rotating and cleaning impurities.

6. A fixture for welding metal parts of electromechanical equipment according to claim 5, characterized in that, The cleaning device includes a hollow block fixedly installed on the left side of the fixed wheel, a transmission wheel rotatably installed on the right side of the H-shaped fixed plate, a second rotating shaft passing through and rotatably installed on the right side of the H-shaped fixed plate, and a second pulley rotatably installed on the right side of the H-shaped fixed plate. A first pulley is fixedly installed on the left side of the hollow block. The first pulley and the second pulley are connected by a belt drive. A first rotating shaft is fixedly installed on the right side of the second pulley. A transmission belt is provided on the outer side of the first rotating shaft. A first gear is assembled in the middle of the first rotating shaft. A second gear is assembled in the middle of the second rotating shaft. A cleaning roller is assembled on the left side of the second rotating shaft.

7. A fixture for welding metal parts of electromechanical equipment according to claim 6, characterized in that, The transmission wheel and gear one mesh with each other, and gear two and transmission wheel mesh with each other.

8. A fixture for welding metal parts of electromechanical equipment according to claim 1, characterized in that, The interior of the housing is equipped with a separating device for separating the two side plates during the welding process.

9. A fixture for welding metal parts of electromechanical equipment according to claim 8, characterized in that, The partition device includes a fixed base fixedly installed on the inner wall of the box, and a hydraulic chamber two fixedly installed on the inner wall of the box. A bimetallic strip is fixedly installed on the right side of the fixed base, a pressure-activated switch is fixedly installed on the right side of the fixed base, and an electric push rod is fixedly installed at the bottom of the fixed base. A hydraulic rod four is slidably connected to a piston at one end of the interior of the hydraulic chamber two, a hydraulic rod five is slidably connected to a piston at the other end of the interior of the hydraulic chamber two, and a hydraulic rod six is ​​slidably connected to a piston at the other end of the interior of the hydraulic chamber two.

10. A fixture for welding metal parts of electromechanical equipment according to claim 9, characterized in that, The pressure-activated switch is electrically connected to the electric push rod, and the coefficient of thermal expansion of the upper layer of the bimetallic strip is greater than that of the lower layer.

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