Mechanical pressure gauge metal shell laser cutting device

Abstract

This invention discloses a laser cutting device for the metal casing of a mechanical pressure gauge, relating to the field of laser cutting technology. It includes a base and a rotary drive assembly. The rotary drive assembly is located on one side of the base and includes a slide table on one side of the base. Shaft supports are fixedly mounted at both ends of the slide table, and a worm gear is rotatably mounted inside the shaft supports. This laser cutting device for the metal casing of a mechanical pressure gauge uses a single set of cylinders to drive a V-shaped pin to swing, simultaneously achieving multiple actions such as disengaging the contouring mechanism, aligning the workpiece, positioning the slide table, and adjusting the cutting head angle. It can continuously complete two processes—processing the outer contour and inner ring inclined step of the irregularly shaped casing—at the same workstation, eliminating the need for workpiece transfer, secondary clamping, and positioning steps, and completely avoiding dimensional deviations caused by secondary positioning. This improves overall production efficiency and ensures the overall machining accuracy of the workpiece, making it suitable for mass production of such irregularly shaped pressure gauge casings.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a laser cutting device for the metal casing of a mechanical pressure gauge. Background Technology

[0002] Mechanical pressure gauges are widely used pressure measuring instruments in industrial production, fluid pipelines, pressure vessels, and other scenarios. Their metal casings not only protect the internal mechanism and provide structural support, but also need to ensure assembly accuracy and appearance quality. Currently, some mechanical pressure gauges on the market use irregularly shaped metal casings. These casings are generally square with rounded transitions on the sides, and an inner ring step with a sloping cross-section is integrally machined at the center hole. The parts have complex structures and require high precision in contour forming, quality of sloping surface machining, and overall positional accuracy.

[0003] Currently, the processing of such irregularly shaped metal shells is mostly done using general-purpose laser cutting equipment. However, existing general-purpose laser cutting machines have relatively limited functions, and most can only perform vertical laser cutting of workpieces with regular contours. They lack matching mechanical contour-following mechanisms and cannot adaptively feed to follow complex outer contours with rounded transitions, making it difficult to guarantee the cutting accuracy and forming effect of irregular outer contours. At the same time, the laser cutting head angle of conventional equipment is fixed and cannot adjust the laser incident angle according to the inclined structure of the inner ring step. It cannot directly complete the cutting of the inclined step. The industry generally adopts a step-by-step processing method, first cutting the outer contour of the workpiece separately, and then transferring it to other equipment to process the inner ring inclined step. This method is not only cumbersome and has a long production cycle, which is not conducive to the mass production of workpieces, but also makes it easy for positioning deviations to occur after the workpiece is transferred and re-clamped and positioned, resulting in out-of-tolerance parts and significantly increasing the scrap rate.

[0004] In summary, existing processing equipment and processes can no longer meet the high-efficiency, high-precision, and integrated processing requirements of the metal casing of this type of irregularly shaped mechanical pressure gauge. Therefore, it is urgent to design a targeted special cutting device to solve the various problems existing in the current technology. Summary of the Invention

[0005] The purpose of this invention is to provide a laser cutting device for the metal casing of a mechanical pressure gauge, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting device for the metal casing of a mechanical pressure gauge, comprising a base and a rotary drive assembly. The rotary drive assembly is disposed on one side of the base, and includes a slide table disposed on one side of the base. Shaft brackets are fixedly installed at both ends of the slide table, and a worm gear is rotatably installed inside the shaft brackets. The worm gear is fixedly connected to the rotating end of a motor, and the outer casing of the motor is bolted to the outer side of the shaft brackets. A worm wheel is meshed on the side of the worm gear, and a rotating shaft is coaxially fixed inside the central hole of the worm wheel. A bracket is fixedly installed on the side end of the slide table, and a disc template is rotatably installed at the bottom end face of the bracket, and a shaped template is rotatably installed at the top end face of the bracket. Both the shaped template and the disc template are rotated and driven coaxially with the worm wheel via the rotating shaft.

[0007] Furthermore, an irregularly shaped outer shell is installed on the irregularly shaped template, and the outline of the outer periphery of the irregularly shaped outer shell is consistent with and proportionally enlarged to the irregularly shaped template, and the outline of the inner ring step of the irregularly shaped outer shell is consistent with and proportionally enlarged to the disc template, and the cross section of the inner ring step of the irregularly shaped outer shell is an inclined surface.

[0008] Furthermore, a screw is fixedly installed on the irregular mold, and a conical handle is threaded onto the screw. Several inner support blocks are concentrically distributed around the screw, and the inclined surface of the inner support block abuts against the outer conical surface of the conical handle. The arc surface at the end of the inner support block abuts against the inner wall of the central hole of the irregular shell.

[0009] Furthermore, an end plate is fixedly installed on one side of the base, and guide rods are fixedly connected to the opposite surfaces of the two end plates. The guide rods slide in cooperation with the central hole of the slide table through linear bearings, and the two ends of the slide table are elastically connected to the adjacent end plates through balance springs.

[0010] Furthermore, a frame is fixedly installed on one side of the base, and a controller is fixedly installed on the top of the frame end face.

[0011] Furthermore, a clamping plate is fixedly installed at the bottom of the end face of the frame, and a laser cutting head is rotatably installed inside the clamping plate, and a hinge pin is fixedly installed on the back of the laser cutting head housing.

[0012] Furthermore, a contour control component is provided on the other side of the base. The contour control component includes a support plate fixedly installed on the other side of the base. A vertical plate is fixedly installed at the bottom rear end of the support plate, and a cylinder is provided at the top rear end of the support plate. The rear end of the cylinder housing is rotatably hinged to the tail end of the support plate via a tail pin.

[0013] Furthermore, the contour control assembly also includes a telescopic rod fixedly connected to the cylinder piston rod. A V-shaped pin is rotatably installed inside the front end of the support plate, and both the horizontal and vertical sections of the V-shaped pin are provided with sliding grooves. The sliding groove on the horizontal section of the V-shaped pin is in sliding engagement with the T-shaped structure at the end of the telescopic rod.

[0014] Furthermore, the contour control assembly also includes a shaped guide roller rotatably mounted at the end of the horizontal section of the V-shaped pin. The shaped guide roller fits against the outer periphery of the shaped template. A hinge shaft is fixedly mounted on the horizontal section of the V-shaped pin, and a hinge connecting rod is rotatably hinged to the middle of the hinge shaft. The hinge connecting rod is rotatably hinged to the laser cutting head on the side away from the V-shaped pin through a hinge pin.

[0015] Furthermore, the contour control component also includes a telescopic plate located at the bottom front end of the support plate. The telescopic plate is engaged with the sliding groove provided on the vertical section of the V-shaped pin via trunnions on both sides. A disc roller is rotatably mounted at the end of the telescopic plate, and the disc roller fits against the outer periphery of the disc template. A spring rod is fixedly connected to the tail end of the telescopic plate, and the spring rod is engaged with the limiting hole in the vertical plate.

[0016] This invention provides a laser cutting device for the metal casing of a mechanical pressure gauge, which has the following beneficial effects; 1. The device is equipped with a specially designed contour-following structure to adapt to irregularly shaped shells. Relying on the cooperation of irregularly shaped templates, irregularly shaped rollers, slides and balance springs, the contour undulations generated by the rotation of the irregularly shaped template drive the slide to move precisely left and right. It can stably replicate complex square-like shapes with rounded transitions on the sides, effectively solving the problem that ordinary laser cutting equipment is difficult to process such irregular contours. The mechanical contour-following transmission has small gaps and good following performance, which can ensure that the cutting trajectory of the outer contour of the shell is highly consistent with the design shape, greatly improving the cutting and forming accuracy and processing consistency of irregularly shaped outer contours.

[0017] 2. This device is designed for processing irregularly shaped shells with an inner ring step section that is inclined. It uses a regular circular disk template with a disk roller for centering and limiting. When processing the inner ring step, the slide remains stationary, and the workpiece only rotates. At the same time, the linkage mechanism adjusts the laser cutting head to the corresponding tilt angle, so that the laser beam completes the cutting at an angle that matches the inclined surface. The limiting effect of the circular template can prevent radial wobbling of the workpiece, ensuring the roundness and coaxiality of the inner ring step. The laser incident angle is precisely matched with the workpiece structure, making the inclined cut surface flat and uniform, perfectly meeting the special processing requirements of the inner ring inclined step.

[0018] 3. This device drives the V-shaped pin to swing through a single set of cylinders, simultaneously realizing multiple actions such as disengaging the contouring mechanism, aligning the workpiece, positioning the slide table, and adjusting the angle of the cutting head. It can continuously complete two processes of machining the outer contour of the irregular shell and the inner ring inclined step at the same station, eliminating the steps of workpiece transfer, secondary clamping and positioning, and completely avoiding the dimensional deviation caused by secondary positioning. This not only improves the overall production efficiency, but also ensures the overall machining accuracy of the workpiece, making it suitable for the mass production of this type of irregular pressure gauge shell. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention. Figure 2 This is a schematic diagram of the overall structure of the device of the present invention from a second perspective; Figure 3 This is a schematic diagram of the overall structure of the rotary drive assembly of the present invention; Figure 4 This is a cross-sectional view of the rotary drive component of the present invention. Figure 5 This is a cross-sectional view of the rotating drive component of the present invention. Figure 6 This is a schematic diagram of the overall structure of the contour control component of the present invention; Figure 7 This is a cross-sectional view of the contour control component of the present invention; Figure 8 This is a schematic diagram showing the changes in the processing state of the outer peripheral surface and inner ring steps of the irregularly shaped outer shell of the present invention; Figure 9 This is a schematic diagram of the irregular shell structure of the present invention.

[0020] In the diagram: 1. Base; 2. Rotary drive assembly; 201. Slide table; 202. Shaft bracket; 203. Worm gear; 204. Motor; 205. Worm wheel; 206. Rotating shaft; 207. Bracket; 208. Disc template; 209. Irregularly shaped template; 3. Irregularly shaped outer shell; 4. Screw; 5. Conical handle; 6. Inner support block; 7. End plate; 8. Guide rod; 9. Balance spring; 10. Frame; 11. Controller; 12. Clamp 1501, Plate; 1502, Laser cutting head; 1503, Hinge pin; 1504, Contouring control assembly; 1505, Support plate; 1506, Vertical plate; 1507, Cylinder; 1508, Tail pin; 1509, Telescopic rod; 15000, V-pin; 15000, Slide groove; 15001, Shaped roller; 15002, Hinge shaft; 1510, Hinge connecting rod; 1511, Telescopic plate; 1512, Disc roller; 1513, Spring rod. Detailed Implementation

[0021] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Please see Figures 1 to 5This invention provides a technical solution: a laser cutting device for the metal casing of a mechanical pressure gauge, comprising a base 1 and a rotary drive assembly 2. The rotary drive assembly 2 is disposed on one side of the base 1. The rotary drive assembly 2 includes a slide 201 disposed on one side of the base 1. Shaft supports 202 are fixedly mounted at both ends of the slide 201, and a worm gear 203 is rotatably mounted inside the shaft supports 202. The worm gear 203 is fixedly connected to the rotating end of a motor 204, and the outer casing of the motor 204 is bolted to the outer side of the shaft supports 202. A worm wheel 205 is engaged with the side of the worm gear 203, and the worm wheel 205 has a central hole inside... A rotating shaft 206 is fixedly mounted coaxially. A bracket 207 is fixedly installed on the side of the slide table 201. A disc template 208 is rotatably mounted on the bottom end face of the bracket 207, and a non-circular template 209 is rotatably mounted on the top end face of the bracket 207. The non-circular template 209 and the disc template 208 are both driven by the rotating shaft 206 and the worm gear 205 coaxially. An end plate 7 is fixedly installed on one side of the base 1, and guide rods 8 are fixedly connected to the opposite faces of the two end plates 7. The guide rods 8 slide in the middle hole of the slide table 201 through linear bearings. The two ends of the slide table 201 are elastically connected to the adjacent end plates 7 through balance springs 9 respectively. The specific operation is as follows: After the workpiece is clamped, the motor 204 is started. The motor 204 drives the worm gear 203 to rotate. Through the meshing transmission between the worm gear 203 and the worm wheel 205, the rotating shaft 206, which is coaxially fixed at the center of the worm wheel 205, rotates continuously. The rotating shaft 206 synchronously drives the upper irregular template 209 and the lower disc template 208 to rotate coaxially and at a uniform speed. The disc template 208 has a regular circular structure with no concave or convex contours on its surface. Then, the controller 11 controls the piston rod of the cylinder 1503 to extend outward, pushing the telescopic rod 1505. Moving forward, the T-shaped structure at the end of the telescopic rod 1505 slides within the groove 1507 of the horizontal section of the V-shaped pin 1506, holding the V-shaped pin 1506 to the working position. This causes the irregularly shaped roller 1508 at the end of the horizontal section of the V-shaped pin 1506 to fit tightly against the irregularly shaped outer contour of the irregularly shaped mold 209. In this state, the overall position of the contour control component 15 is fixed, and the irregularly shaped roller 1508 remains stationary. When the irregularly shaped mold 209 rotates with the rotating shaft 206, its outer circumferential contour continuously exerts a lateral thrust on the irregularly shaped roller 1508. Under the pre-tensioning action of the balance springs 9 on both sides of the slide table 201, the slide table 201, which carries the irregular-shaped template 209, the disc template 208, and the workpiece, moves back and forth along the guide rod 8. At this time, the laser cutting head 13 remains vertical, and the laser beam is vertically aligned with the outer periphery of the irregular-shaped shell 3. Relying on the combined motion of the rotation of the irregular-shaped template 209 and the left and right movement of the slide table 201, the laser cutting head 13 completes the contour laser cutting of the outer contour of the irregular-shaped shell 3 along a preset trajectory. This device is equipped with a specially adapted contour laser cutting structure for the outer contour of the irregular-shaped shell 3. The shaped template 209, the irregular roller 1508, the slide table 201 and the balance spring 9 work together to use the contour undulation generated by the rotation of the irregular template 209 to drive the slide table 201 to move precisely left and right. This can stably replicate the complex square shape with rounded transitions on the sides, effectively solving the problem that ordinary laser cutting equipment is difficult to process such irregular contours. The mechanical contour transmission has small gaps and good following performance, which can ensure that the cutting trajectory of the outer contour of the shell is highly consistent with the design shape, greatly improving the cutting and forming accuracy and processing consistency of the irregular outer contour. Please see Figures 3 to 4 A non-circular shell 3 is installed on the non-circular template 209. The outline of the outer periphery of the non-circular shell 3 is consistent with that of the non-circular template 209 and is enlarged proportionally. The outline of the inner ring step of the non-circular shell 3 is consistent with that of the disc template 208 and is enlarged proportionally. The cross section of the inner ring step of the non-circular shell 3 is a slope. A screw 4 is fixedly installed on the non-circular template 209. A conical handle 5 is threaded onto the screw 4. Several inner support blocks 6 are concentrically distributed around the screw 4. The upper slope of the inner support block 6 abuts against the outer conical surface of the conical handle 5. The arc surface at the end of the inner support block 6 abuts against the inner wall of the central hole of the non-circular shell 3. The specific operation is as follows: Place the irregular metal shell to be processed on the upper surface of the irregular template 209, and turn the conical handle 5 to rotate it downward along the screw 4 in the middle of the irregular template 209. During the downward movement of the conical handle 5, its outer conical surface and the inclined surface of the evenly distributed inner support blocks 6 around the screw 4 squeeze each other and drive all the inner support blocks 6 to expand outward synchronously. The arc surface at the end of the inner support block 6 presses tightly against the inner wall of the central hole of the irregular shell 3 to achieve the workpiece inner support clamping and positioning. This clamping method only acts on the central inner hole area of ​​the workpiece, completely avoiding the processing areas such as the outer contour and inner ring step of the workpiece, and will not block the laser cutting path, and there is no processing interference. Please see Figures 6 to 9 A frame 10 is fixedly installed on one side of the base 1, and a controller 11 is fixedly installed on the top end face of the frame 10. A clamping plate 12 is fixedly installed on the bottom end face of the frame 10, and a laser cutting head 13 is rotatably installed inside the clamping plate 12. A hinge pin 14 is fixedly installed on the back of the housing of the laser cutting head 13. A contour control assembly 15 is provided on the other side of the base 1. The contour control assembly 15 includes a support plate 1501 fixedly installed on the other side of the base 1, and a vertical plate 15 is fixedly installed at the bottom rear end of the support plate 1501. 02, and a cylinder 1503 is provided at the top rear end of the support plate 1501, and the rear end of the cylinder 1503 housing is rotatably hinged to the rear end of the support plate 1501 via a tail pin 1504. The contour control assembly 15 also includes a telescopic rod 1505 fixedly connected to the piston rod of the cylinder 1503. A V-shaped pin 1506 is rotatably installed inside the front end of the support plate 1501, and both the horizontal and vertical sections of the V-shaped pin 1506 are provided with sliding grooves 1507, and the sliding groove 1507 on the horizontal section of the V-shaped pin 1506 is connected to the telescopic rod 1505. The T-shaped structure at the end of the retractable rod 1505 slides in contact with the contour control assembly 15, which also includes a shaped guide roller 1508 rotatably mounted at the end of the horizontal section of the V-shaped pin 1506. The shaped guide roller 1508 fits against the outer contour of the shaped template 209. A hinge shaft 1509 is fixedly mounted on the horizontal section of the V-shaped pin 1506, and a hinge connecting rod 1510 is rotatably hinged to the middle of the hinge shaft 1509. The hinge connecting rod 1510 is rotated with the laser cutting head 13 via a hinge pin 14 on the side away from the V-shaped pin 1506. The hinged contour control assembly 15 also includes a telescopic plate 1511 located at the bottom front end of the support plate 1501. The telescopic plate 1511 is engaged with the slide groove 1507 provided on the vertical section of the V-shaped pin 1506 via trunnions on both sides. A disc roller 1512 is rotatably mounted at the end of the telescopic plate 1511, and the disc roller 1512 fits against the outer periphery of the disc template 208. A spring rod 1513 is fixedly connected to the tail end of the telescopic plate 1511, and the spring rod 1513 is limited to the central hole of the vertical plate 1502. The specific operation is as follows: After the outer contour cutting process is completed, the controller 11 controls the piston rod of the cylinder 1503 to retract, pulling the telescopic rod 1505 backward. The T-shaped structure at the end of the telescopic rod 1505 slides to the end of the horizontal section of the slide groove 1507 of the V-shaped pin 1506, causing the V-shaped pin 1506 to swing clockwise around the front notch of the support plate 1501. This action simultaneously triggers three sets of linkage changes to complete the processing mode switch. First, the horizontal section of the V-shaped pin 1506 is lifted upward, the irregular-shaped guide roller 1508 disengages from the irregular-shaped guide mold 209, the outer contour contouring structure is released from constraint, and the slide table 201 moves to the middle position under the reset action of the balance spring 9, driving the irregular outer contour... First, the shell 3 is precisely shifted so that the inner ring step of the workpiece is aligned with the laser cutting head 13. Second, during the swinging process of the V-shaped pin 1506, the inner wall of the groove 1507 of its vertical section abuts against the trunnions on both sides of the telescopic plate 1511, pushing the telescopic plate 1511 to extend outward along the front end of the support plate 1501, so that the disc roller 1512 at the end of the telescopic plate 1511 is tightly attached to the outer circular surface of the regular circular disc template 208. Since the disc template 208 is a standard circle with no contour undulations, the disc roller 1512 only plays a role in radial limiting and centering after it is attached to it. The slide table 201 no longer slides left and right, ensuring the stability of the workpiece processing position and the consistency of coaxiality. Third, the V-shaped pin The hinge shaft 1509 on the horizontal section 1506 swings synchronously with the body, pulling the hinge pin 14 on the back of the laser cutting head 13 through the hinge link 1510, causing the laser cutting head 13 to deflect and tilt around the clamping plate 12, so that the incident angle of the laser beam matches the inclined angle of the inner ring step of the irregular shell 3. After the state switch is completed, the rotating shaft 206 continues to rotate at a constant speed, driving the irregular shell 3 to rotate synchronously. At this time, the slide table 201 is stationary. Relying only on the rotation of the workpiece itself and the tilting of the laser cutting head 13 to emit light, the laser cutting operation of the inner ring inclined step is continuously completed. The entire set of equipment does not require manual disassembly, secondary clamping, or manual adjustment, and automatically completes the outer contour and For the continuous processing of the inner ring inclined step, this device is designed for the processing requirements of the inner ring step of the irregular shell 3, which has an inclined cross section. This device uses a regular circular disk template 208 with a disk roller 1512 for centering and limiting. When processing the inner ring step, the slide table 201 remains stationary, and the workpiece only rotates. At the same time, the laser cutting head 13 is adjusted to the corresponding tilt angle through the linkage mechanism, so that the laser beam completes the cutting at an angle that matches the inclined surface. The limiting effect of the circular template can prevent radial wobbling of the workpiece, ensuring the roundness and coaxiality of the inner ring step. The laser incident angle is precisely matched with the workpiece structure, making the inclined cut surface flat and uniform, perfectly meeting the special processing requirements of the inner ring inclined step.

[0022] In summary, this device is designed for irregularly shaped metal casings of mechanical pressure gauges, which are roughly square with rounded edges and have an inner beveled step. It utilizes a mechanical contouring mechanism to cut the outer contour of the casing, and then a linkage mechanism automatically switches the work station and cutting posture. The inner beveled step is processed using pure rotation in conjunction with a tilting laser head. The entire process achieves continuous, integrated operation of these two steps. The specific workflow is as follows: First, place the irregularly shaped metal shell to be processed on the upper surface of the irregularly shaped template 209, and screw the conical handle 5 to rotate it downward along the screw 4 in the middle of the irregularly shaped template 209. During the downward movement of the conical handle 5, its outer conical surface and the inclined surface of the evenly distributed inner support blocks 6 around the screw 4 squeeze and drive each other, driving all the inner support blocks 6 to expand outward synchronously. The arc surface at the end of the inner support block 6 presses tightly against the inner wall of the central hole of the irregularly shaped shell 3, realizing the workpiece internal support clamping and positioning. This clamping method only acts on the central inner hole area of ​​the workpiece, completely avoiding the processing areas such as the outer contour and inner ring steps of the workpiece, and will not block the laser cutting path, and there is no processing interference. Secondly, after the workpiece is clamped, the motor 204 is started. The motor 204 drives the worm 203 to rotate. Through the meshing transmission between the worm 203 and the worm wheel 205, the rotating shaft 206, which is coaxially fixed at the center of the worm wheel 205, rotates continuously. The rotating shaft 206 synchronously drives the upper irregular template 209 and the lower disc template 208 to rotate coaxially at a uniform speed. The disc template 208 has a regular circular structure with no concave or convex contours on its surface. Subsequently, the controller 11 controls the piston rod of the cylinder 1503 to extend outward, pushing the telescopic rod 1505 forward. The T-shaped structure at the end of the telescopic rod 1505 slides in the groove 1507 of the horizontal section of the V-shaped pin 1506, holding the V-shaped pin 1506 to the working position, so that the irregular roller 1508 at the end of the horizontal section of the V-shaped pin 1506 fits tightly against the irregular outer contour of the irregular template 209. In this state, the overall position of the contour control component 15 is fixed, and the irregular roller 1508 remains stationary. When the irregular mold 209 rotates with the rotating shaft 206, its outer periphery concave and convex contours continuously exert lateral thrust on the irregular roller 1508. Under the pre-tightening action of the balance springs 9 on both sides of the slide table 201, the slide table 201, which carries the irregular mold 209, the disc mold 208 and the workpiece, moves back and forth along the guide rod 8. At this time, the laser cutting head 13 remains vertical, and the laser beam is vertically aligned with the outer periphery of the irregular shell 3. Relying on the combined motion of the rotation of the irregular mold 209 and the left and right movement of the slide table 201, the laser cutting head 13 completes the contour laser cutting of the outer contour of the irregular shell 3 along the preset trajectory. This device is equipped with a specially adapted contour-following structure for irregularly shaped shells 3. Relying on the cooperation of irregularly shaped template 209, irregularly shaped roller 1508, slide table 201 and balance spring 9, the contour undulation generated by the rotation of irregularly shaped template 209 drives slide table 201 to move precisely left and right. It can stably replicate the complex shape of a square with rounded transitions on the side, effectively solving the problem that ordinary laser cutting equipment is difficult to process such irregular contours. The mechanical contour-following transmission has small gaps and good following performance, which can ensure that the cutting trajectory of the outer contour of the shell is highly consistent with the design shape, greatly improving the cutting and forming accuracy and processing consistency of irregularly shaped outer contours. Finally, after the outer contour cutting process is completed, the controller 11 controls the piston rod of the cylinder 1503 to retract, pulling the telescopic rod 1505 backward. The T-shaped structure at the end of the telescopic rod 1505 slides to the end of the horizontal section of the slide groove 1507 of the V-shaped pin 1506, causing the V-shaped pin 1506 to swing clockwise around the front notch of the support plate 1501. This action simultaneously triggers three sets of linkage changes, completing the processing mode switch. First, the horizontal section of the V-shaped pin 1506 is lifted upward, the irregular roller 1508 is disengaged from the irregular template 209, the outer contour contouring structure is released from constraint, and the slide table 201 moves to the middle position under the reset action of the balance spring 9, which drives the irregular shell 3 to move precisely, so that the inner ring step of the workpiece is aligned with the laser cutting head 13. Secondly, during the swinging process of the V-shaped pin 1506, the inner wall of the groove 1507 of its vertical section abuts against the trunnions on both sides of the telescopic plate 1511, pushing the telescopic plate 1511 to extend outward along the front end of the support plate 1501, so that the disc roller 1512 at the end of the telescopic plate 1511 is tightly attached to the outer circular surface of the regular circular disc mold 208. Since the disc mold 208 is a standard circle with no contour undulation, the disc roller 1512 only plays the role of radial limit and centering after it is attached to it. The slide table 201 no longer slides left and right, ensuring that the workpiece processing position is stable and the coaxiality is consistent. Third, the hinge shaft 1509 on the horizontal section of the V-shaped pin 1506 swings synchronously with the body, and pulls the hinge pin 14 on the back of the laser cutting head 13 through the hinge link 1510, causing the laser cutting head 13 to deflect and tilt around the clamping plate 12, so that the incident angle of the laser beam matches the inclined angle of the inner ring step of the irregular shell 3. After the state switch is completed, the rotating shaft 206 continues to rotate at a constant speed, driving the irregular shell 3 to rotate synchronously. At this time, the slide table 201 remains stationary. The laser cutting operation of the inner ring inclined step is continuously completed by relying solely on the rotation of the workpiece itself and the tilting of the laser cutting head 13. The entire set of equipment does not require manual disassembly, secondary clamping, or manual adjustment. It automatically completes the continuous processing of the outer contour and the inner ring inclined step. This device is designed for the processing requirements of the inner ring step of the irregular shell 3 with an inclined cross section. This device uses a regular circular disk template 208 with a disk roller 1512 for centering and limiting. When processing the inner ring step, the slide table 201 remains stationary, and the workpiece only rotates. At the same time, the laser cutting head 13 is adjusted to the corresponding tilt angle through the linkage mechanism so that the laser beam completes the cutting at an angle that matches the inclined surface. The limiting effect of the circular template can prevent the workpiece from radially shaking, ensuring the roundness and coaxiality of the inner ring step. The laser incident angle is precisely matched with the workpiece structure, making the inclined cutting surface flat and uniform, perfectly meeting the special processing requirements of the inner ring inclined step. This device drives the V-shaped pin 1506 to swing through a single cylinder 1503, simultaneously realizing multiple actions such as disengaging the contouring mechanism, aligning the workpiece, positioning the slide table 201, and adjusting the cutting head angle. It can continuously complete two processes of machining the outer contour and inner ring inclined step of the irregular shell 3 at the same station, eliminating the steps of workpiece transfer, secondary clamping and positioning, and completely avoiding the dimensional deviation caused by secondary positioning. This not only improves the overall production efficiency, but also ensures the overall machining accuracy of the workpiece, making it suitable for the mass production of this type of irregular pressure gauge shell.

[0023] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A laser cutting device for the metal casing of a mechanical pressure gauge, comprising a base (1) and a rotary drive assembly (2), characterized in that, A rotary drive assembly (2) is provided on one side of the base (1). The rotary drive assembly (2) includes a slide (201) provided on one side of the base (1). A shaft bracket (202) is fixedly installed at both ends of the side of the slide (201), and a worm gear (203) is rotatably installed on the inner side of the shaft bracket (202). The worm gear (203) is fixedly connected to the rotating end of the motor (204), and the outer housing of the motor (204) is bolted to the outer side of the shaft bracket (202). A worm gear (205) is installed on the side, and a rotating shaft (206) is fixed coaxially inside the hole of the worm gear (205). A bracket (207) is fixedly installed on the side end of the slide (201), and a disc template (208) is rotatably installed on the bottom end face of the bracket (207), and a shaped template (209) is rotatably installed on the top end face of the bracket (207). The shaped template (209) and the disc template (208) are both driven by rotating shaft (206) and worm gear (205) coaxially.

2. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 1, characterized in that, An irregular shell (3) is installed on the irregular template (209), and the outline of the outer periphery of the irregular shell (3) is consistent with that of the irregular template (209) and enlarged proportionally. The outline of the inner ring step of the irregular shell (3) is consistent with that of the disc template (208) and enlarged proportionally. Moreover, the cross section of the inner ring step of the irregular shell (3) is an inclined surface.

3. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 2, characterized in that, A screw (4) is fixedly installed on the irregular mold (209), and a conical handle (5) is threaded onto the screw (4). Several inner support blocks (6) are concentrically distributed around the screw (4), and the inclined surface of the inner support block (6) abuts against the outer conical surface of the conical handle (5). The arc surface at the end of the inner support block (6) abuts against the inner wall of the central hole of the irregular shell (3).

4. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 3, characterized in that, The base (1) has an end plate (7) fixedly installed on one side, and guide rods (8) are fixedly connected to the opposite surfaces of the two end plates (7). The guide rods (8) slide in cooperation with the central hole of the slide table (201) through linear bearings, and the two ends of the slide table (201) are elastically connected to the adjacent end plate (7) through balance springs (9).

5. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 4, characterized in that, A frame (10) is fixedly installed on one side of the base (1), and a controller (11) is fixedly installed on the top end face of the frame (10).

6. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 5, characterized in that, A clamping plate (12) is fixedly installed at the bottom of the end face of the frame (10), and a laser cutting head (13) is rotatably installed inside the clamping plate (12), and a hinge pin (14) is fixedly installed on the back of the housing of the laser cutting head (13).

7. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 6, characterized in that, A contour control component (15) is provided on the other side of the base (1). The contour control component (15) includes a support plate (1501) fixedly installed on the other side of the base (1). A vertical plate (1502) is fixedly installed at the bottom rear end of the support plate (1501), and a cylinder (1503) is provided at the top rear end of the support plate (1501). The rear end of the cylinder (1503) housing is rotatably hinged to the tail end of the support plate (1501) through a tail pin (1504).

8. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 7, characterized in that, The contour control assembly (15) also includes a telescopic rod (1505) fixedly connected to the piston rod of the cylinder (1503). A V-shaped pin (1506) is rotatably installed inside the front end of the support plate (1501), and both the horizontal and vertical sections of the V-shaped pin (1506) are provided with grooves (1507). The grooves (1507) on the horizontal section of the V-shaped pin (1506) are in sliding engagement with the T-shaped structure at the end of the telescopic rod (1505).

9. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 8, characterized in that, The contour control assembly (15) further includes a profile roller (1508) rotatably mounted at the end of the horizontal section of the V-pin (1506). The profile roller (1508) fits against the outer periphery of the profile template (209). A hinge shaft (1509) is fixedly mounted on the horizontal section of the V-pin (1506), and a hinge link (1510) is rotatably hinged in the middle of the hinge shaft (1509). The hinge link (1510) is rotatably hinged to the laser cutting head (13) on the side away from the V-pin (1506) through a hinge pin (14).

10. The laser cutting device for the metal casing of a mechanical pressure gauge according to claim 9, characterized in that, The contour control component (15) further includes a telescopic plate (1511) located at the bottom front end of the support plate (1501). The telescopic plate (1511) is engaged with the slide groove (1507) provided on the vertical section of the V-shaped pin (1506) via trunnions on both sides. A disc roller (1512) is rotatably mounted at the end of the telescopic plate (1511), and the disc roller (1512) is in contact with the outer periphery of the disc template (208). A spring rod (1513) is fixedly connected to the tail end of the telescopic plate (1511), and the spring rod (1513) is limited to the central hole of the vertical plate (1502).

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