A lifting type reciprocating welding positioning jig

Abstract

This application discloses a lifting-type reciprocating welding positioning fixture, relating to the field of mechanical manufacturing technology. It includes a base, a cylinder, an ejector pin, and a fixture plate. The fixture plate has a support platform, lifting holes, and four sets of slide grooves evenly arranged along the circumference of the lifting holes. Each set of slide grooves contains a horizontally sliding alignment block. One side of the alignment block contacts the conical surface of the ejector pin via a push rod, and both sides are connected to the inner wall of the slide groove by springs. This fixture uses a single cylinder to drive the ejector pin to rise and fall, utilizing its conical surface to simultaneously contact four push rods, forming a purely mechanical synchronization mechanism. This synchronously drives the four sets of alignment blocks to perform radial opening and closing movements, achieving rapid, accurate, and stable workpiece positioning. The springs are in a pre-compressed state, providing force for the alignment blocks to automatically reset and eliminating movement backlash. This design replaces a complex multi-cylinder synchronization system with a simple mechanical linkage, significantly improving positioning consistency and reliability, and reducing cost and maintenance difficulty.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and more specifically, to a lifting reciprocating welding positioning fixture. Background Technology

[0002] In the automated welding process of small ring-shaped or cylindrical metal workpieces such as anchors and collars, how to achieve rapid, accurate and stable positioning and clamping of the workpiece during the welding process is the key link to ensure welding quality and improve production efficiency. It is also a common challenge faced by traditional positioning fixtures that rely on manual adjustment or multiple independent cylinder drives. A search revealed an existing patent (publication number: CN117444503A) that discloses a positioning fixture and a welding device. The positioning fixture includes a positioning element, comprising a positioning element body and multiple positioning portions disposed on the positioning element body. The positioning element body is used to place a first workpiece, and the multiple positioning portions jointly position the first workpiece. A clamping element includes a clamping element body and at least one clamping portion. The clamping element body is used to clamp the first workpiece, and the clamping portion is connected to the clamping element body via an elastic portion that can extend and retract vertically. The clamping portion is used to clamp a second workpiece placed on the first workpiece. The clamping portion and the second workpiece are arranged in a one-to-one correspondence. The clamping portion has a welding operation hole and at least one air blowing channel disposed around the welding operation hole. A first driving element, at least two in number, is disposed on both sides of the clamping element and is used to drive the clamping element to move up and down to clamp or release the first and second workpieces. In the process of developing this application, the inventors discovered the following problems with the prior art: The fixture relies on manual operation or the separate adjustment of multiple independent positioning blocks to clamp the workpiece. This operation method is inefficient and it is difficult to ensure that the force applied to the workpiece by multiple clamping points is completely uniform during each positioning, which can easily lead to workpiece eccentricity or uneven force, affecting the form and position tolerances after welding. In order to achieve synchronous positioning of multiple points, some designs use multiple independent cylinders to drive the positioning blocks separately. This not only increases the complexity of the air circuit, solenoid valve and control system, but also increases the cost and the number of failure points. At the same time, it is difficult to guarantee the absolute synchronicity of the actions of multiple cylinders. Therefore, a lifting reciprocating welding positioning fixture is proposed to address the above problems. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this application provides a lifting reciprocating welding positioning fixture to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a lifting reciprocating welding positioning fixture, comprising a base platform, a cylinder mounted on the top of the base platform, a ejector pin connected to the top of the cylinder, a fixture plate mounted on one side of the ejector pin, the fixture plate comprising a support platform, a lifting hole, a slide groove, and a storage groove, the slide groove being provided in four sets, and the four sets of slide grooves being evenly arranged along the circumferential direction of the lifting hole, each set of slide grooves having an alignment block inside, a push rod mounted on one side of the alignment block, the ejector pin driving the push rod to cause the alignment block to move horizontally along the slide groove, springs mounted on both sides of the alignment block, the other side of the springs being fixedly connected to the inner wall of the slide groove.

[0005] Preferably, the bottom of the jig disk is provided with a support rod, and there are four sets of support rods, which are evenly arranged along the circumference of the jig disk. An air source device is provided on one side of the support rod, and an operating component is provided on one side of the air source device.

[0006] By connecting the control line or air circuit to the air source device and cylinder, the operator can control the start / stop of the air source device or the airflow direction by operating this control component, thereby driving the cylinder to move. The principle of this design is to modularly integrate the actuator, support component and control system. The support rod ensures the static stability of the bearing and positioning reference surface, which is the basis for accurate positioning. The air source device and control component constitute a complete pneumatic control system, realizing convenient and reliable control of the lifting drive mechanism.

[0007] Preferably, the bottom of the ejector pin is provided with a connecting hole, and the top of the cylinder is provided with a plug-in block, and the connecting hole can be fitted and connected with the plug-in block.

[0008] This invention creates a stable, reliable, easy-to-assemble and disassemble mechanical connection that can accurately transmit linear thrust. The interlocking connection between the plug block and the connecting hole realizes the coaxial connection between the cylinder piston rod and the ejector pin, ensuring that the vertical driving force generated by the cylinder can be transmitted to the ejector pin without deviation or loss, driving it to perform precise reciprocating linear motion. At the same time, this interlocking structure also provides convenience for equipment maintenance and component replacement.

[0009] Preferably, the slide groove is provided with limiting arms inside, and there are two sets of limiting arms, which are symmetrically arranged along the internal space of the slide groove, with the storage slot located in the middle of the two sets of limiting arms.

[0010] A stable guiding mechanism is formed by symmetrically arranged limiting arms, which engage with the fixed arms on both sides of the positioning block. This strictly limits the degree of freedom of the positioning block in the horizontal direction, preventing it from swaying or deflecting during movement. It ensures that the force transmission direction is accurate and consistent when the positioning block pushes the material, thereby ensuring that the material can be accurately and stably pushed into the placement slot to complete the positioning.

[0011] Preferably, the alignment block includes a main body, a pressing edge, and a fixing arm. The pressing edge is provided at one end of the main body, and the fixing arms are provided on both sides of the main body.

[0012] The integrated structure enables multiple functions. The main body is used to directly push the material for positioning. The fixed arms on both sides engage with the limiting arms in the chute to ensure that the positioning block can only slide horizontally without shaking. The pressing edge at one end presses the material down when pushing it, counteracting the upward tendency of the material caused by friction, and ensuring that the thrust is used entirely for horizontal propulsion.

[0013] Preferably, the ejector pin reciprocates along the lifting hole via the cylinder, and the reciprocating motion of the ejector pin can be simultaneously transmitted to the four sets of alignment blocks via the push rod.

[0014] Utilizing the geometric properties of the conical surface of the ejector pin, its single axial linear motion is converted into the radial horizontal motion of four sets of push rods without delay and with equal quantity through the inclined surface contact.

[0015] Preferably, when the ejector pin moves upward, the alignment block compresses the spring; when the ejector pin moves downward, the alignment block resets along the horizontal direction of the slide groove under the force of the spring, thereby utilizing the elastic deformation of the spring to store and release energy to achieve automatic reset of the alignment block.

[0016] Preferably, the spring is in a pre-compressed state when the alignment block is in the reset state, and has a pre-tightening force that pushes the alignment block toward the center of the lifting hole.

[0017] The pre-compression of the spring provides a constant inward restoring force, which ensures that the alignment block can stably fit against the inside of the push rod or the preset mechanical limit in the initial position and after reset, eliminating the shaking that may be caused by the gap. At the same time, when the ejector pin begins to push the alignment block upward, it can immediately overcome this preload force, making the motion response more direct and eliminating idle stroke.

[0018] Preferably, the support platform holds the material to be processed, and the inner wall of the material to be processed is in contact with one side of the storage groove. The support platform provides a stable placement plane for the main material to be assembled, while the storage groove provides a precise initial position and lateral positioning reference for the secondary material to be welded, so that the two materials can achieve self-centering through structural bonding.

[0019] Preferably, the conical outer surface of the ejector pin and the inner end faces of the four sets of push rods simultaneously form a mechanical synchronization mechanism, thereby enabling the cylinder to drive the ejector pin in one lifting motion to synchronously control the radial opening and closing of the four sets of alignment blocks; utilizing the geometric characteristic that the radial dimension of the conical surface changes continuously and uniformly when moving axially, the single axial linear motion of the ejector pin is converted into the synchronous radial horizontal motion of the four sets of push rods without intermediate links and at equal time and distance through simultaneous contact with the four driving points, i.e., the end faces of the push rods.

[0020] The technical effects and advantages of this application are as follows: 1. Compared with existing technologies, this lifting reciprocating welding positioning fixture uses a cylinder to drive a conical ejector pin, and utilizes the conical surface of the ejector pin to simultaneously contact the inner end faces of four sets of push rods, forming a mechanical synchronization mechanism. This core design allows the cylinder to drive the ejector pin to rise and fall once, thereby controlling the radial equidistant opening and closing movements of the four sets of positioning blocks without delay and with absolute synchronization. This ensures that the workpiece is simultaneously and uniformly positioned at the center by four points, greatly improving positioning accuracy and consistency.

[0021] 2. Compared with existing technologies, this lifting reciprocating welding positioning fixture incorporates springs on both sides of the positioning block. Specifically, the springs are pre-compressed when the positioning block resets, providing a pre-tightening force to push the positioning block towards the center of the lifting hole. This design allows the positioning block to automatically, quickly, and stably reset to its initial central position under the spring pre-tightening force after the ejector pin descends to release it, preparing it for the next clamping operation. Simultaneously, the pre-tightening force itself is converted into an initial constant clamping force on the workpiece. Combined with the main clamping force applied by the ejector pin as it moves upwards, this ensures the stability of the clamping process during welding and effectively prevents loosening.

[0022] 3. Compared with existing technologies, this lifting reciprocating welding positioning fixture replaces the complex multi-cylinder drive and electronic control synchronization system with a pure mechanical linkage system consisting of a cylinder, ejector pin, and push rod. Mechanical synchronization itself has inherent reliability and durability, reduces the number of air circuits, sensors, and controllers, thereby reducing system complexity, manufacturing costs, and failure rates, and improving the overall reliability and maintenance convenience of the fixture. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a partial structural diagram of the base platform of this application; Figure 3 This is a schematic diagram of the fixture disc and ejector pin structure of this application; Figure 4 This is a schematic diagram of the original structure of the fixture disc in this application; Figure 5 This is a schematic diagram of the jig disc after it has been pushed out in this application; Figure 6 This is a partial structural diagram of the cylinder in this application; Figure 7 This is a schematic diagram of a partial three-dimensional structure of the alignment block in this application; Figure 8 This is a side view of the jig plate and ejector pin of this application.

[0024] The attached diagram is labeled as follows: 1. Base platform; 2. Cylinder; 21. Insertion block; 3. Ejector pin; 31. Connecting hole; 4. Fixture plate; 41. Support platform; 42. Lifting hole; 43. Slide groove; 44. Storage groove; 5. Alignment block; 51. Main body; 52. Pressing edge; 53. Fixing arm; 6. Push rod; 7. Spring; 8. Support rod; 9. Air source device; 10. Operating component; 11. Limiting arm. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Example 1 As attached Figures 1 to 8The illustrated lifting reciprocating welding positioning fixture includes a base platform 1. Positioning of the entire device is achieved through a centrally located cylinder 2, which serves as the driving power source. A conical head ejector pin 3 is connected to the top of the cylinder 2 as a transmission component. The ejector pin 3 passes through a fixture plate 4 with a lifting hole 42. The lifting hole 42 does not interfere with the up-and-down movement of the ejector pin 3 and serves to regulate its reciprocating motion. The fixture plate 4 is made of high-hardness alloy material and has an outwardly extending support platform 41 at the bottom for placing the material to be processed and providing stable support via a support rod 8 below. The fixture plate 4 is integrally cut, with four grooves 43 evenly arranged and cut along the circumference of the lifting hole 42 on its surface. The grooves 43 form the basic space for welding positioning, and the cut surfaces are smooth, flat, and burr-free, ensuring processing quality. A storage groove 44 is cut on the side of the groove 43 closest to the material to be processed, used to place another material to be welded. Thus, after positioning, welding of both materials completes the processing. The materials in the storage trough 44 are placed manually by the operator. The slide 43 contains a core component, the alignment block 5, which enables welding positioning. The alignment block 5 is cast entirely of brass. One side is fixedly connected to a push rod 6 for linkage with the ejector pin 3, while the other side features symmetrically protruding fixing arms 53. These fixing arms 53 engage with limiting arms 11 cut into the slide 43, allowing the alignment block 5 to move along the space formed by the limiting arms 11 and the slide 43 without swaying left or right. Furthermore, the fixing arms... The lower part of 53 is connected to the inner wall of the slide 43 by a spring 7. The spring 7 is used to reset the positioning block 5. The main body 51 of the positioning block 5 is in the middle of the fixed arm 53. The main body 51 can enter the placement groove 44 under the drive of the ejector pin 3, and push the material to accurately perform the alignment operation with the material on the support platform 41. One end of the main body 51 is designed with a pressing edge 52. The pressing edge 52 is used to counteract the force that causes the material to move upward when the positioning block 5 pushes the material, thereby efficiently converting the motion into the force that pushes the material forward. In the process, first, place the small materials to be processed into the storage slot 44 one by one, and pay attention to whether the orientation of the materials is correct when placing them. Then, place another large material to be assembled on the support platform 41 and make sure that the connection hole of the large material is aligned with the storage slot 44. Then, the operator starts the air source device 9 through the control component 10 to supply energy to the cylinder 2, so that the cylinder 2 pushes the ejector pin 3 to move upward. At this time, the push rod 6, which is in contact with the outer wall of the ejector pin 3, pushes the positioning block 5 under the movement of the ejector pin 3, thereby pushing the small material to be positioned. After reaching the preset position, the ejector pin 3 stops moving and works together with the spring 7 to keep the positioning block 5 stationary, ensuring that the processing position remains unchanged. After welding is completed, the ejector pin 3 moves downward. After the positioning block 5 loses the force restricting its movement on one side, it resets under the push of the spring 7, thereby releasing the fixation and positioning of the small material. Then, the worker lifts the processed material from above the support platform 41 to wait for the next operation.

[0027] Example 2 Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 8 As shown below, see details: In a preferred embodiment, four support rods 8 are uniformly fixedly connected along the circumference of the bottom of the jig disc 4, which is integrally cut from a high-hardness alloy. The lower ends of these four support rods 8 are connected to the base platform 1, thereby providing a stable and rigid support platform for the entire jig disc 4 and the material to be processed on it, ensuring that the jig disc 4 will not shake or shift during the welding positioning process, thus ensuring processing accuracy. At the same time, an air source device 9, such as an air pump or air tank, is installed on the base platform 1 to provide power to the cylinder 2, and is connected to the cylinder 2 through a pipeline. An operating component 10 is provided in an easily operable position. The operating component 10 can be a manual reversing valve or a push-button switch, which is connected to the air source device 9 and the cylinder 2 through a control line or air line. The operator can control the start and stop of the air source device 9 or the airflow direction by operating this operating component 10, thereby driving the cylinder 2 to move.

[0028] In a preferred embodiment, a plug-in block 21 with a specific geometric shape is machined at the top of the piston rod of the cylinder 2, which serves as the power output component. This plug-in block 21 can typically be designed as a cuboid, a cylinder, or an irregularly shaped boss with a guide surface. At the same time, a connecting hole 31 matching the shape and size of the plug-in block 21 is machined at the center of the bottom of the ejector pin 3, which serves as the transmission component. This connecting hole 31 is a non-through blind hole or a hole with a snap-fit ​​structure, so that the plug-in block 21 at the top of the cylinder 2 can be accurately inserted into and fitted into the connecting hole 31 at the bottom of the ejector pin 3. This design creates a stable, reliable, easy-to-assemble and disassemble mechanical connection that can accurately transmit linear thrust. The fitting connection between the plug-in block 21 and the connecting hole 31 realizes the coaxial connection between the piston rod of the cylinder 2 and the ejector pin 3, ensuring that the vertical driving force generated by the cylinder 2 can be transmitted to the ejector pin 3 without deviation or loss, driving it to perform precise reciprocating linear motion.

[0029] In a preferred embodiment, two limiting arms 11 are symmetrically arranged within the internal space of the groove 43 formed by integrated cutting on the surface of the jig disc 4. These two limiting arms 11 are arranged parallel to the inner walls of the groove 43 on both sides along its length, thereby defining a precise guide channel within the groove 43. The placement slot 44 is machined at the center between the two sets of limiting arms 11 and communicates with the groove 43, allowing the alignment block 5 moving from the groove 43 to be accurately guided to the placement slot 44 area. This design, through the symmetrically arranged limiting arms 11, forms a stable guiding mechanism that engages with the fixed arms 53 on both sides of the alignment block 5, thereby strictly limiting the degree of freedom of the alignment block 5 in the horizontal direction, preventing it from swaying or deflecting during movement, ensuring that the force transmission direction when the alignment block 5 pushes the material is precise and consistent, and thus ensuring that the material can be accurately and stably pushed into the placement slot 44 for positioning.

[0030] In a preferred embodiment, the alignment block 5 is an integrated component consisting of a main body 51, a pressing eave 52, and a fixing arm 53. The main body 51 is the core block that moves along the slide groove 43. The pressing eave 52 extending from one end is located above the main body 51, and the fixing arms 53 symmetrically arranged on both sides extend outward from the side of the main body 51. The principle of this design is to achieve multiple functions through an integrated structure. The main body 51 is used to directly push the material for positioning. The fixing arms 53 on both sides engage with the limiting arms 11 in the slide groove 43 to ensure that the alignment block 5 can only slide horizontally without shaking. The pressing eave 52 at one end presses the material down when pushing it, counteracting the upward tendency of the material caused by friction, and ensuring that the thrust is used entirely for horizontal propulsion.

[0031] In a preferred embodiment, the ejector pin 3, driven by the cylinder 2 to perform vertical reciprocating motion, maintains surface contact between its conical side and the inner end faces of the four push rods 6, forming a mechanical synchronization mechanism centered on the ejector pin 3. This design utilizes the geometric characteristics of the conical surface of the ejector pin 3 to convert its single axial linear motion into radial horizontal motion of the four sets of push rods 6 without delay and with equal quantity through inclined surface contact.

[0032] In a preferred embodiment, the core function of the spring 7 installed between the inner wall of the slide 43 and the fixing arm 53 of the alignment block 5 is to utilize the elastic deformation of the spring 7 to store and release energy to achieve automatic reset of the alignment block 5. According to this principle, in actual implementation, one end of the spring 7 needs to be connected to the fixing arm 53 of the alignment block 5, and the other end needs to be fixed to the inner wall of the slide 43. When the cylinder 2 drives the ejector pin 3 to move upward and pushes the alignment block 5 to move horizontally outward along the slide 43 through the push rod 6, the alignment block 5 will simultaneously compress the spring 7 to store energy. When the welding is completed and the ejector pin 3 moves downward and retracts, the outward pushing force of the ejector pin 3 on the push rod 6 disappears. At this time, the compressed spring 7 releases its stored elastic potential energy and pushes the alignment block 5 to move horizontally inward along the slide 43 until it returns to the initial position, thereby completing a complete working cycle of positioning and reset.

[0033] In a preferred embodiment, during the assembly of the fixture, when the alignment block 5 is in its initial reset position and not pushed by the ejector pin 3, the spring 7 installed between the inner wall of the slide groove 43 and the fixing arm 53 of the alignment block 5 has been pre-compressed with a certain amount of mechanical force. This allows the spring 7 to store elastic potential energy in its initial state and continuously generate a preload force that pushes the alignment block 5 toward the center of the lifting hole 42. This design utilizes the pre-compression state of the spring 7 to provide a constant inward restoring force, which ensures that the alignment block 5 can stably fit against the inner side of the push rod 6 or the preset mechanical limit in its initial position and after reset, eliminating the shaking that may be caused by the gap. At the same time, when the ejector pin 3 begins to push the alignment block 5 upward, this preload force can be immediately overcome, making the motion response more direct and eliminating idle stroke. During assembly, one end of the spring 7 is first fixed to the mounting point on the inner wall of the slide groove 43. Then, when the alignment block 5 is placed in the reset position, the other end of the spring 7 is connected or pressed onto the fixing arm 53 of the alignment block 5. At this time, the length of the spring 7 is shorter than its free length and is in a pre-compressed state. The resulting pre-tightening force always presses the alignment block 5 toward the center. During operation, this pre-tightening force, together with the driving and releasing of the ejector pin 3, ensures the accuracy of the movement of the alignment block 5 and the certainty of the reset.

[0034] In a preferred embodiment, the operator first manually places the small material to be welded into the storage groove 44 on the surface of the jig plate 4, so that one side of it is in contact with the vertical inner wall of the storage groove 44, thereby determining the horizontal orientation of the small material. Then, the large material to be assembled is placed on the support platform 41 and its position is adjusted so that the connecting hole 31 or the part to be welded is roughly aligned with the small material in the storage groove 44. When the cylinder 2 drives the alignment block 5 to push the small material, the small material moves along the direction of the side wall of the storage groove 44, and finally its end is precisely in contact with the corresponding part on the large material, thus completing the precise positioning before welding.

[0035] As a preferred embodiment, the conical surface of the ejector pin 3 needs to be precisely machined, and the inner end faces of the four sets of push rods 6 need to be at the same horizontal height and perfectly fit with the conical surface. When the cylinder 2 drives the ejector pin 3 to perform a rising or falling motion, the contact force between its conical surface and the end faces of all push rods 6 changes simultaneously, thereby synchronously driving all four sets of alignment blocks 5 to converge inward or open outward along their respective slides 43, realizing the synchronous positioning or release of four directional points on a workpiece, ensuring the consistency of positioning action and machining accuracy.

[0036] The working process of this application is as follows: First, place the small materials to be processed into the storage slot 44 in sequence. When placing them, pay attention to whether the orientation of the materials is correct. Then, place another large material to be assembled on the support platform 41 and make sure that the connection hole of the large material is aligned with the storage slot 44. Then, the operator supplies power to the cylinder 2 by manipulating the pneumatic air source device 9 of the component 10, so that the cylinder 2 pushes the ejector pin 3 to move upward. At this time, the push rod 6, which is in contact with the outer wall of the ejector pin 3, pushes the positioning block 5 under the movement of the ejector pin 3, thereby pushing the small material to be positioned. After reaching the preset position, the ejector pin 3 stops moving and works together with the spring 7 to keep the positioning block 5 stationary, ensuring that the processing position remains unchanged. After welding is completed, the ejector pin 3 moves downward. After the positioning block 5 loses the force restricting its movement on one side, it resets under the push of the spring 7, thereby releasing the fixation and positioning of the small material. Then, the worker lifts the processed material from above the support platform 41 to wait for the next operation. The above is the working principle of this type of lifting reciprocating welding positioning fixture.

[0037] Finally: The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lifting reciprocating welding positioning fixture, comprising a base platform (1), characterized in that: A cylinder (2) is provided on the top of the base (1), and a pin (3) is connected to the top of the cylinder (2). A jig plate (4) is provided on one side of the pin (3). The jig plate (4) includes a support platform (41), a lifting hole (42), a slide (43) and a storage slot (44). There are four sets of slides (43), and the four sets of slides (43) are evenly arranged along the circumferential direction of the lifting hole (42). An alignment block (5) is provided inside each set of slides (43). A push rod (6) is provided on one side of the alignment block (5). The pin (3) drives the push rod (6) to make the alignment block (5) move along the horizontal direction of the slide (43). Springs (7) are provided on both sides of the alignment block (5), and the other side of the spring (7) is fixedly connected to the inner wall of the slide (43).

2. The lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The bottom of the jig disk (4) is provided with a support rod (8), and there are four sets of the support rod (8), and the four sets of the support rod (8) are evenly arranged along the circumference of the jig disk (4). An air source device (9) is provided on one side of the support rod (8), and an operating component (10) is provided on one side of the air source device (9).

3. The lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The bottom of the ejector pin (3) is provided with a connection hole (31), and the top of the cylinder (2) is provided with a plug block (21). The connection hole (31) can be fitted and connected with the plug block (21).

4. The lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The slide (43) is provided with limiting arms (11) inside. There are two sets of limiting arms (11), and the two sets of limiting arms (11) are symmetrically arranged along the internal space of the slide (43). The storage slot (44) is located in the middle of the two sets of limiting arms (11).

5. The lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The alignment block (5) includes a main body (51), a pressing edge (52) and a fixing arm (53). The pressing edge (52) is provided at one end of the main body (51), and the fixing arm (53) is provided on both sides of the main body (51).

6. The lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The ejector pin (3) reciprocates along the lifting hole (42) driven by the cylinder (2), and the reciprocating motion of the ejector pin (3) can be transmitted to the four sets of alignment blocks (5) simultaneously through the push rod (6).

7. A lifting reciprocating welding positioning fixture according to claim 6, characterized in that: When the ejector pin (3) moves upward, the alignment block (5) squeezes the spring (7). When the ejector pin (3) moves downward, the alignment block (5) resets along the horizontal direction of the slide groove (43) under the force of the spring (7).

8. A lifting reciprocating welding positioning fixture according to claim 7, characterized in that: When the alignment block (5) is in the reset state, the spring (7) is in a pre-compressed state and has a pre-tightening force that pushes the alignment block (5) toward the center of the lifting hole (42).

9. A lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The support platform (41) holds the material to be processed, and the inner wall of the material to be processed is in contact with one side of the storage groove (44).

10. A lifting reciprocating welding positioning fixture according to claim 1, characterized in that: The conical outer surface of the ejector pin (3) and the inner end faces of the four sets of push rods (6) simultaneously form a mechanical synchronization mechanism, so that the cylinder (2) can synchronously control the radial opening and closing of the four sets of alignment blocks (5) by driving the ejector pin (3) to lift once.

Images