Welding fixture for metal cutting machine bed

Abstract

This invention relates to a welding fixture for the bed of a metal cutting machine, comprising a first support base, a second support base, two inner clamping plates, two outer clamping plates, a plurality of first slides matching the first support base, and a plurality of second slides matching the second support base. The first support base includes a body that matches the first slides and a longitudinal beam that matches a shaped hole on the second support base. The body has two positioning arms and set bolts whose ends can extend into the shaped hole to contact and separate from the longitudinal beam. The second support base has a pressure arm unit comprising a slider that can controllably move relative to the second support base and has multiple pressure arms. One end of each clamping plate is fixedly mounted on each first slide, and the other end matches a shaped hole on each second slide. The second slides have set bolts whose ends extend into the shaped hole to contact and separate from the clamping plates. This invention ensures the assembly accuracy between the guide rail and the bed, improves assembly efficiency, and enhances the consistency of assembly quality.

Description

Technical Field

[0001] This invention belongs to the field of metal cutting equipment manufacturing, and specifically relates to the bed welding fixture of a metal cutting machine. Background Technology

[0002] In the manufacturing process of laser cutting / welding machine tools, plasma welding machine tools, etc., the installation accuracy of the guide rail base plays a crucial role in the machine tool's operational accuracy. Therefore, the installation quality between the guide rail base and the machine bed directly affects the overall performance of the laser cutting machine tool. To ensure the relative positioning accuracy between the guide rail base and the machine bed, tooling is required during the manufacturing process of the laser cutting / welding machine (including the welding operation) to precisely define the relative position between the guide rail base and the machine bed in advance, so as to smoothly carry out assembly operations such as welding.

[0003] In traditional assembly operations, bolt clamps, angle iron brackets, and other tooling are often used to define the position between the machine bed and the guide rail. However, the use of these toolings relies heavily on the experience of the operators for installation and adjustment, and the operation varies significantly among different workers. Therefore, the positioning process is cumbersome, inefficient, inconsistent, and unreliable. It is prone to excessive positioning deviations of the guide rail, resulting in substandard straightness and parallelism of the guide rail, thus affecting the overall machine's running and operational accuracy. Summary of the Invention

[0004] To address the positioning problems encountered when mounting guide rail seats onto the machine bed, this invention provides a welding fixture for the machine bed of a metal cutting machine. This fixture can improve assembly efficiency, assembly quality, and consistency while ensuring the assembly accuracy between the guide rail seats and the machine bed.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a metal cutting machine bed welding fixture, including a support seat 1 and a support seat 2 arranged opposite to each other in front and back, a pair of inner side plates and a pair of outer side plates extending in the front-back direction, and a plurality of first slides that match the support seat 1 and a plurality of second slides that match the support seat 2 respectively through slide rail structures extending in the left and right directions.

[0006] Support base one includes a base body and a longitudinal beam extending rearward from the base body at its free end. Two positioning arms are provided on the rear side of the base body, arranged alternately on the left and right sides. A first slide block mates with the base body, allowing the first slide block to move relative to the base body in the left-right direction. Support base two has a shaped hole that matches the free end side of the longitudinal beam via a sliding rail structure extending forward and backward, allowing support base two to move back and forth relative to the base body. Simultaneously, a set bolt one is provided on the upper part of support base two, with the end of the set bolt one extending into the shaped hole and capable of contacting and separating from the upper end face of the longitudinal beam, thus selectively switching support base two between a movable relative state and a fixed relative state.

[0007] The front side of the support base two is provided with multiple pressure arm units distributed alternately on the left and right sides. Each pressure arm unit includes a slider that can be controllably moved back and forth relative to the support base two. Multiple pressure arms are formed on the end face of the slider facing the base body, so that the free end of each pressure arm can extend outward / forward relative to the front side of the support base two.

[0008] One end of the inner clamping plate and one end of the outer clamping plate are respectively fixed on each of the first slides, and the other ends are respectively matched with the second slides, so that the inner clamping plate and the outer clamping plate extend parallel to each other. The two inner clamping plates are arranged adjacent to each other on the left and right, and the two outer clamping plates are respectively arranged on the outside of the two inner clamping plates, so that the two inner clamping plates are located opposite each other between the two outer clamping plates.

[0009] The second slide block has a shaped hole that matches the other end of the inner clamping plate and the other end of the outer clamping plate through a sliding rail structure extending forward and backward, so that each clamping plate can move back and forth relative to the second slide block. A second set bolt is provided on the upper part of the second slide block, and the screw end of the second set bolt extends into the shaped hole, which can contact and separate from the upper end face of the inner clamping plate and the upper end face of the outer clamping plate, so that the clamping plate and the second slide block can be selectively switched between a state in which they can move relative to each other and a state in which they are relatively fixed together.

[0010] Optionally, the support base two has multiple grooves that correspond one-to-one with the pressure arm units. The pressure arm unit also includes an assembly slide and a drive assembly. The slider and the assembly slide are matched by a linear track structure, and the drive assembly can selectively switch the slider between a state in which it can move relative to the assembly slide and a state in which it remains fixedly connected to the assembly slide.

[0011] The assembly slide and the groove are matched by a track structure that extends left and right, allowing the assembly slide to move left and right relative to the support seat 2, thereby adjusting the left and right position of the pressure arm.

[0012] Optionally, the drive assembly includes a stud, a return spring, a nut, and a bolt. The slider is disposed within the cavity of the mounting slide and mates with the sidewall of the mounting slide via multiple guide posts. The axial extension direction of the guide posts is parallel to the direction of movement of the slider (relative to the mounting slide). A U-shaped body and a through hole mate with the stud are provided on the outer sidewall of the mounting slide. The U-shaped body and the guide posts are on the same side.

[0013] One end of the double-ended stud is fixedly connected to the slider, and the other end extends into the U-shaped body and is fitted with a return spring, and is equipped with a nut. Tightening the nut adjusts the initial compression state of the return spring. The bolt threadedly matches the top wall of the U-shaped body, and the free end of the bolt thread can contact and match the other end of the double-ended stud.

[0014] Optionally, a countersunk hole is formed on the free end face of the bolt. The other end of the stud can extend into the countersunk hole, and the other end face of the stud contacts and matches the inner bottom surface of the countersunk hole.

[0015] Optionally, the inner clamping plate is provided with multiple L-shaped cantilever arms arranged alternately front and rear. Correspondingly, the outer clamping plate is provided with bosses that match the L-shaped cantilever arms.

[0016] The L-shaped cantilever includes a vertically extending arm and a horizontal arm extending towards the outermost side of the adjacent bracket. The lower end face of the horizontal arm is aligned with the upper end face of the boss.

[0017] At least one transverse straight groove is formed on the cross arm, extending inward from its free end. A plurality of studs are formed on the upper part of the boss, each corresponding to one of the transverse straight grooves. The root of each stud can extend into the transverse straight groove, and a nut is disposed at the end of each stud. Tightening the nut secures the cross arm to the boss.

[0018] Optionally, multiple alternating strip-shaped protrusions are formed on the upper surface of the boss. The length direction of the strip-shaped protrusions is consistent with the length direction of the cross arm. The top surface of the strip-shaped protrusions is formed as a semi-cylindrical surface, and the top line of the semi-cylindrical surface can contact and match the lower end surface of the cross arm.

[0019] Optionally, multiple transverse straight slots are provided on the cross arm, and these multiple transverse straight slots are distributed alternately front and back. The bosses and transverse straight slots are matched one-to-one, and the root of the stud on each boss can be inserted into each transverse straight slot respectively.

[0020] Optionally, a sleeve is fitted at the root of the stud. This allows the sleeve to be inserted into the transverse straight groove, and the outer diameter of the sleeve matches the width of the transverse straight groove.

[0021] Optionally, the positioning arm includes two arm plates arranged alternately in the vertical direction, and a connecting plate one and a connecting plate two are provided between the inner sides of the free ends of the two arm plates and are arranged alternately in front and behind. The connecting plate two is located inside the connecting plate one.

[0022] It also includes a curved body that matches the two arm plates via a track structure that extends forward and backward, a transmission unit on the first connecting plate, and a sensing unit on the second connecting plate.

[0023] The top of the curved surface faces outward and extends to the outer side of the free end face of the arm plate. Multiple guide rods are provided at the inner end of the curved surface, arranged alternately around the circumference. The axial direction of the guide rods extends in the front-rear direction. The guide rods pass through a through hole in connecting plate one and continue to extend close to connecting plate two. A spring element one is fitted onto the section of the guide rod extending between connecting plate one and connecting plate two, and a nut two is disposed at its end. Tightening the nut two adjusts the initial compression state of the spring element one.

[0024] One end of the transmission unit is matched with the curved body, and the other end is matched with the sensing unit. As the top of the curved body gradually comes into contact with the reference surface on the bed, it can cause the curved body to move relative to the arm plate, so that the transmission unit can transmit elastic force in the front-to-back direction between the curved body and the sensing unit, and the sensing unit can generate real-time sensing signals.

[0025] By comparing and analyzing the sensing signals of the sensing units on the two positioning arms, the contact status between the two positioning arms and the reference surface can be determined, which helps to monitor and determine in real time whether the extension direction of the clamping plate relative to the bed is in a state that meets the requirements.

[0026] The curved surface portion of the surface body can be a hemisphere or a semi-cylinder. In addition, multiple interconnected surface bodies, transmission units, and sensing units can be set on each positioning arm, and these multiple surface bodies, transmission units, and sensing units can be distributed alternately from left to right, so that the same positioning arm can generate multiple sensing signals.

[0027] Optionally, a transmission rod extending forward and backward is provided on the inner end side of the curved surface. Correspondingly, the transmission unit includes a stud that matches the connecting plate through a threaded structure, an annular member fixed on the outer end side of the stud, and a spring member sleeved on one part of the transmission rod.

[0028] An axial through hole is formed on the stud, and the free end of the transmission rod passes through the annular part and matches the sensing unit after passing through the stud. This enables the sensing unit to generate real-time sensing signals during the movement of the curved body relative to the arm plate.

[0029] Optionally, the sensing unit includes a cylindrical housing that is threadedly matched with the connecting plate 2, a sensor body disposed on the inner end side of the cylindrical housing, a transmission rod 2 disposed on the outer end side of the cylindrical housing, and a sensitive component disposed within the cylindrical housing. The sensor body and the sensitive component are matched by electrical connection.

[0030] The second transmission rod can move relative to the cylindrical outer shell in the front-back direction. One end of the second transmission rod matches the first transmission rod, and the other end extends into the cylindrical outer shell to match the sensitive component. During the movement of the curved body relative to the arm plate, the second transmission rod can be driven by the first transmission rod, which can cause a change in the physical quantity of the sensitive component, thereby causing the sensor body to generate a sensing signal.

[0031] The cylindrical outer shell and the connecting plate 2 can be matched with a threaded structure, so that the front and rear ends of the cylindrical outer shell can be adjusted relative to the front and rear positions of the connecting plate 2. This allows for adjustment of the matching state between the transmission rod 1 and the transmission rod 2, thereby enabling the setting of the initial state of each sensing unit and ensuring that the initial states of multiple sensing units are consistent.

[0032] Optionally, the sensing component includes a fixed ring member and a movable ring member that can move relative to each other in the front-back direction, and a plurality of elastic bodies connected between the two and distributed alternately around the circumference. Each elastic body is provided with a strain gauge connected to the sensor body.

[0033] The fixed annular component is fixedly matched to the inner wall of the cylindrical shell by a threaded structure, while the movable annular component is matched to the second transmission rod. The back-and-forth movement of the second transmission rod can drive the movable annular component to move back and forth relative to the fixed annular component, causing elastic deformation of the elastic body and resulting in changes in the physical quantity of the strain gauge.

[0034] The end of transmission rod one can be inserted into the port of the cylindrical outer shell and make relative contact with transmission rod two. At that time, the elastic deformation tension of the elastic body can form a force that drives transmission rod two to maintain a pressing contact with transmission rod one.

[0035] The portion of the transmission rod that extends into the port of the cylindrical outer shell can establish a surface contact matching relationship with the cylindrical outer shell, thereby forming a linear matching structure that can better constrain and guide the movement direction of the transmission rod.

[0036] Optionally, one end of the elastomer is fixedly connected to end ring one, and end ring one is fixedly connected to the fixed ring member or is an integrally formed structure; the other end of the elastomer is fixedly connected to end ring two, and end ring two is fixedly connected to the base plate of the moving ring member.

[0037] Optionally, the base plate is annular and has a threaded through hole. The transmission unit also includes a screw cylinder that matches the threaded through hole on the base plate, and a thrust spring sleeved on one end of the screw cylinder near the sensor body.

[0038] The thrust spring extends into the recessed part located at the end of the sensor body, and can apply an elastic force in the front-to-back direction to the moving ring, which helps to ensure that the moving ring can fully reset relative to the stationary ring during operation.

[0039] One end of the screw cylinder has a radial flange, with its outer diameter larger than the inner diameter of the second end ring. The other end of the screw cylinder passes through the second end ring and matches a threaded through hole on the base plate. It extends towards the sensor body relative to the base plate and engages with one end of the thrust spring. Tightening the screw cylinder pulls the second end ring towards the base plate, allowing the elastic body to fully expand and set the initial state of the strain gauge.

[0040] The end of the transmission rod two is provided with a radial flange that can extend into the screw cylinder, and the transmission rod two can work together with the thrust spring to apply a force in the front-to-back direction on the moving ring.

[0041] The beneficial effects of the present invention are: the bed welding fixture involved in the present invention can significantly improve the operating efficiency of accurately fixing the guide rail seat on the bed, and can promote the establishment of good straightness between the guide rail seat and the bed, promote good parallelism between two parallel guide rail seats, and improve the consistency of welding / assembly quality between the guide rail seat and the bed. Attached Figure Description

[0042] Figure 1 This is a top view of the structure of this application.

[0043] Figure 2 This is a schematic diagram of the left-side structure of this application.

[0044] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point I in the middle.

[0045] Figure 4 for Figure 2 A magnified schematic diagram of the structure at point II.

[0046] Figure 5 This is a partial structural diagram showing the matching of the curved surface, the transmission unit, and the sensing unit.

[0047] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point III.

[0048] Figure 7 This is a top view of the pressure arm unit (without the top cover on the mounting slide).

[0049] In the diagram: 10 Support base one, 11 Base body, 111 Positioning arm, 1111 Surface, 112 Connecting plate one, 113 Connecting plate two, 12 Longitudinal beam, 121 Longitudinal rail section one; 20 Support base two, 21 Pressure arm unit, 211 Assembly slide, 2111 U-shaped body, 212 Slider, 2121 Pressure arm, 2122 Guide post, 213 Double-ended stud, 214 Return spring, 215 Nut one, 216 Bolt, 22 Set bolt one; 30 Inner clamping plate, 31 L-shaped cantilever, 311 Vertical arm, 312 Horizontal arm, 3121 Transverse straight groove; 40 Outer clamping plate, 41 Boss, 42 Stud body, 43 Nut, 44 Sleeve, 45 Longitudinal rail section two; 50 The... 1. Slide seat; 60. Second slide seat; 61. Set bolt 2; 70. Curved surface; 71. Top of curved surface; 72. Guide rod; 721. Spring component 1; 722. Nut 2; 73. Countersunk hole; 731. Transmission rod 1; 74. Linear guide section; 80. Transmission unit; 81. Stud component; 82. Ring component; 83. Spring component 2; 90. Sensing unit; 91. Cylindrical housing; 92. Sensor body; 93. Transmission rod 2; 931. Radial flange; 94. Sensing component; 941. Fixed ring component; 942. Moving ring component; 9421. Base plate; 943. Elastomer; 944. End ring 1; 945. End ring 2; 95. Screw component; 96. Thrust spring; 100. Bed; 101. Reference surface; 200. Track seat; α. Clearance. Detailed Implementation

[0050] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0051] like Figures 1 to 7 The illustrated metal cutting machine bed welding fixture includes a support base 10 and a support base 20 arranged opposite each other in the front and rear (i.e., in the Y-axis direction, the same below), a pair of inner side plates 30 and a pair of outer side plates 40 extending in the front-rear direction, and four first slides 50 that match the support base 10 and four second slides 60 that match the support base 20 respectively through slide rail structures extending in the left-right direction (i.e., in the X-axis direction, the same below).

[0052] The support base 10 includes a base body 11 and a longitudinal beam 12 extending rearward from the base body 11 at its free end. A first slide 50 mates with the base body 11, allowing the first slide 50 to move relative to the base body 11 in a left-right direction. The longitudinal beam 12 extends perpendicularly to the rear end face (front-back) of the base body 11. Two positioning arms 111, alternating left and right sides, are provided on the rear side of the base body 11 (i.e., the end face opposite to the support base 20). See also... Figure 1 As shown, during the assembly operation, the rear end face of the positioning arm 111 (i.e., Figure 4 The surface 1111 shown is opposite to and in contact with the reference surface 101 on the bed 100 to ensure that the length direction of the seat body 11 extends in the left-right direction and to ensure the parallelism of the length extension direction of the longitudinal beam 12 relative to the front-back direction. This ensures that the arrangement direction of the entire tooling body relative to the bed 100 meets the requirements, so that the length extension direction of the track seat 200 can be ensured to extend in the front-back direction in subsequent operations, achieving the required relative parallelism.

[0053] The second support base 20 is provided with a shaped hole that matches the free end side of the longitudinal beam 12 via a sliding rail structure extending forward and backward, allowing the second support base 20 to move forward and backward relative to the seat body 11. Simultaneously, a first set bolt 22 is provided on the upper part of the second support base 20, with the screw end of the first set bolt 22 extending into the shaped hole and capable of contacting and separating from the upper end face of the longitudinal beam 12. This allows the second support base 20 to selectively switch between a state where it can move relative to the first support base 10 and a state where it remains relatively fixed, adapting to the needs of different lengths of the bed 100. Furthermore, multiple pressure arm units 21 are provided on the front side of the second support base 20, arranged alternately on the left and right sides. Each pressure arm unit 21 includes a slider 212 that can controllably move forward and backward relative to the second support base 20. Four pressure arms 2121 are formed on the end face of the slider 212 facing the seat body 11, see... Figure 7 .

[0054] One end of the inner clamping plate 30 and one end of the outer clamping plate 40 are respectively fixed to each of the first slide blocks 50, and the other ends are respectively matched with the second slide blocks 60, so that the inner clamping plate 30 and the outer clamping plate 40 extend relatively parallel to each other (in the front-back direction) and can extend on the plane above the upper end surface of the bed 100. At the same time, the two inner clamping plates 30 are adjacent to each other and distributed alternately; the two outer clamping plates 40 are respectively located outside the two inner clamping plates 30, presenting a distribution state in which the two inner clamping plates 30 are located opposite each other between the two outer clamping plates 40. At least the inner clamping plate 30 can slide in the left-right direction above the longitudinal beam 12.

[0055] Each of the four second slide blocks 60 is provided with a shaped hole that matches the other end of the inner clamping plate 30 and the other end of the outer clamping plate 40 respectively through a sliding rail structure extending forward and backward, so that each clamping plate (i.e., the two inner clamping plates 30 and the two outer clamping plates, the same below) can move back and forth relative to the second slide block 60. At the same time, a second set bolt 61 is provided on the upper part of the second slide block 60, and the screw end of the second set bolt 61 extends into the shaped hole and can contact and separate from the upper end face of the inner clamping plate 30 and the upper end face of the outer clamping plate 40. This allows the clamping plate to selectively switch between a state in which it can move relative to the second slide block 60 and a state in which it can remain relatively fixed together. It can also move back and forth relative to the second slide block 60 in conjunction with the forward and backward movement of the second support base 20 relative to the longitudinal beam 12.

[0056] like Figure 1 , Figure 2 As shown, on the rear end side of the longitudinal beam 12, a longitudinal rail portion 121 is provided on its upper end face, which corresponds to and matches the shaped hole on the support seat 20. On the rear end side of the inner clamping plate 30 and the rear end side of the outer clamping plate 40, longitudinal rail portions 45 are provided on their upper end faces, which correspond to and match the shaped hole on the second slide 60. The front-to-back extension length of the inner clamping plate 30 and the front-to-back extension length of the outer clamping plate 40 can be the same, and both are not less than the front-to-back extension length of the longitudinal beam 12. The width of the longitudinal beam 12 (left-to-right parameter, the same below) is greater than the width of the clamping plate.

[0057] The lower parts of the seat body 11 and the lower parts of the second support seat 20 are both equipped with caster assemblies and support cylinder assemblies (or foot assemblies). The caster assemblies ensure that the first support seat 10 and the second support seat 20 (as a whole) can move together, enabling easy movement of the entire tooling. The support rod assembly (containing at least four hydraulic telescopic cylinders) can fix the position of the entire tooling relative to the bed 100, making it difficult to move, and can change the height of the entire tooling (or the height of the seat body 11 and the height of the second support seat 20), so that the longitudinal beam 12 can be positioned above the upper end face of the bed 100. In the assembled tooling, the clamping plate is positioned above the longitudinal beam 12. It should be emphasized that the specific forms of the caster assemblies and the support cylinder assemblies are not described in detail because they are not closely related to the technical innovations of this application and can be easily implemented by those skilled in the art by referring to existing technologies.

[0058] When assembling the track seat 200 on the bed 100 using the above technical solution, firstly, the heights of the first support seat 10 (i.e., the seat body 11) and the second support seat 20 are adjusted to match the height of the upper surface of the bed 100, ensuring that the longitudinal beam 12 can be moved accordingly above the upper surface of the bed 100. Then, the fixture is moved so that the two positioning arms 111 (rear ends) on the seat body 11 are fully in contact with the reference surface 101 (front end) of the bed 100, thus adjusting the layout direction of the entire fixture relative to the bed 100. This ensures that the length extension of the clamping plate conforms to the layout direction requirements of the track seat 200. Next, the first set bolt 22 and the second set bolt 61 are tightened to fix the second support seat 20 relative to the longitudinal beam 12 and to fix the second slide 60 relative to the clamping plate. The tool is then fixed in place; next, the pressure arm unit 21 is adjusted so that the pressure arm 2121 can press only on the rear end face of the bed 100, thus completing the fixing operation of the entire tooling relative to the bed 100; finally, the inner clamping plate 30 and the outer clamping plate 40 on the left side are moved to limit the rail seat 200 on the left side of the bed 100, and the inner clamping plate 30 and the outer clamping plate 40 on the right side are moved to limit the rail seat 200 on the right side of the bed 100, thus completing the limitation of the assembly position of the two rail seats 200 relative to the bed 100.

[0059] The support base 20 has multiple grooves that correspond one-to-one with the pressure arm unit 21. See Figure 7 As shown, the pressure arm unit 21 also includes an assembly slide 211 and a drive assembly. The slider 312 is matched with the assembly slide 211 through a linear track structure, and the drive assembly can selectively switch the slider 312 between a state in which it can move relative to the assembly slide 211 and a state in which it remains fixed to the assembly slide 211.

[0060] The assembly slide 211 is matched with the groove through a left-right extending track structure, allowing the assembly slide 211 to move left and right relative to the support base 20. This allows adjustment of the left and right positions of each pressure arm 2121, ensuring that the free end face of each pressure arm 2121 can fully contact the planar portion located on the rear end face of the bed 100 and on the same vertical plane. This improves the state, quality, stability, and reliability of the relatively fixed state established between the tooling and the bed.

[0061] like Figure 7As shown, the drive assembly includes a double-ended stud 213, a return spring 214, a nut 215, and a bolt 216. The slider 212 is disposed within the seat cavity of the mounting slide 211 and matches the side wall of the mounting slide 211 via multiple guide posts 2122 to better ensure the linearity of the slider 212's movement relative to the mounting slide 211, significantly reducing the skew error of the relative movement.

[0062] A U-shaped body 2111 and a through hole matching the double-ended stud 213 are provided on the outer side wall of the mounting slide 211. One end of the double-ended stud 213 is fixedly connected to the slider 212, and the other end extends into the U-shaped body 2111 and is fitted with the return spring 214, and the nut 215 is disposed thereon. The bolt 216 is threadedly matched with the top wall of the U-shaped body 2111, and the free end of the bolt 216 can contact and match the other end of the double-ended stud 213.

[0063] Tightening the bolt 216 to move it relative to the U-shaped body 2111 allows the bolt 216 to push the double-ended stud 213 to move (in the same direction as the slider 212 moving relative to the mounting slide 211), driving the slider 212 to move relative to the mounting slide 211, allowing the free end face of the pressure arm 2121 to extend outside the mounting slide 211. Tightening the bolt 216 in the opposite direction causes the double-ended stud 213 to move in the opposite direction under the action of the return spring 214, which in turn pulls the slider 212 towards the mounting slide 211.

[0064] The through hole provided on the mounting slide 211 can be a cylindrical hole with its inner diameter matching the outer diameter of the cylindrical section of the double-ended stud 213. A countersunk hole can be formed on the end face of the bolt 216, allowing the other end of the double-ended stud 213 to be inserted into the countersunk hole, so that the end face of the other end of the double-ended stud 213 contacts and matches the bottom surface of the countersunk hole.

[0065] The inner clamping plate 30 is provided with two L-shaped cantilever arms 31 arranged alternately front and back; correspondingly, the outer clamping plate 40 is provided with bosses 41 that match the L-shaped cantilever arms 31 (one to the left and one to the right).

[0066] The L-shaped cantilever 31 includes a vertical arm 311 extending upwards (along the Z-axis direction) and a horizontal arm 312 extending toward the outer side of the adjacent outer clamping plate 40. The lower end face of the horizontal arm 312 is on the same plane (at the same height) as the upper end face of the boss 41.

[0067] Two transverse straight grooves 3121 are formed on the cross arm 312, extending inward from its free end, and the two transverse straight grooves 3121 are distributed alternately front and back. The boss 41 may be cylindrical and its outer diameter may be larger than the width of the transverse straight grooves 3121 (front and back dimension parameter).

[0068] The upper part of the boss 41 has a stud 42 that corresponds to and matches the transverse straight groove 3121. The root of the stud 42 can extend into the transverse straight groove 3121 (arranged opposite to it), and a nut 43 is provided at the end of the stud 42. Tightening the nut 43 can fix the cross arm 312 above the boss 41, and fix the adjacent inner clamping plate 30 and the outer clamping plate 40 together.

[0069] To reduce the sliding resistance when the cross arm 312 contacts and matches the upper surface of the boss 41, and to reduce wear, multiple alternating strip-shaped protrusions can be formed on the upper surface of the boss 41. The length direction of the strip-shaped protrusions is consistent with the length direction of the cross arm 312. The top surface of the strip-shaped protrusions is formed as a semi-cylindrical surface, and the top line of the semi-cylindrical surface can contact and match the lower surface of the cross arm 312. This reduces the resistance to relative movement, reduces wear, and ensures that the boss 41 provides good support for the cross arm 312, making it less prone to downward deflection under pressure.

[0070] Each of the cross arms 312 has two transverse straight grooves 3121, and a sleeve 44 is fitted at the root of each stud 42. The sleeve 44 can be inserted into the corresponding transverse straight groove 3121 (relative to the one located inside it), and the outer diameter of the sleeve 44 is consistent with the groove width of the transverse straight groove 3121. This structure not only facilitates the insertion and matching process between the stud 42 and the transverse straight groove 3121, but also maintains stable relative parallelism between the adjacent inner and outer clamping plates 30 and 40, resulting in better reliability. If any inner clamping plate 30 or outer clamping plate 40 exhibits excessive forward or backward misalignment, it can be detected promptly, helping to ensure the stability of the assembly quality of the guide rail seat 200 on the bed 100.

[0071] like Figures 1 to 2 , Figures 4 to 6As shown, the positioning arm 111 includes two arm plates arranged alternately in the vertical direction, and a connecting plate 112 and a connecting plate 113 are provided between the inner sides of the free ends (rear ends, i.e., the ends away from the seat body 11) of the two arm plates, arranged alternately front and back. The connecting plate 113 is located opposite to the inner side of the connecting plate 112, that is, the connecting plate 113 is relatively close to the seat body 11. Correspondingly, the solution of this application also includes a curved body 70 that matches the two arm plates through a track structure extending front and back, a transmission unit 80 provided on the connecting plate 112, and a sensing unit 90 provided on the connecting plate 113.

[0072] The top 71 of the curved body 70 faces outward and can extend to the outer side of the arm plate, tangentially contacting and matching the reference surface 101. Initially, the front-to-back position of the curved bodies 70 on the two positioning arms 111 is adjusted so that the top 71 of the curved body extends outward relative to the surface 1111 on the arm plate, forming a gap α (existing in the front-to-back direction) between the top 71 of the curved body and the surface 1111. The gap α on the two positioning arms 111 is adjusted to be the same size (within an allowable error range). Specifically, linear guide portions 74 (corresponding grooves to the linear guide portions 74) are formed on the upper and lower parts of the curved body 70, respectively, to allow the curved body 70 to move back and forth relative to the arm plate or the positioning arm 111.

[0073] The curved surface portion of the surface body 70 can be a hemisphere or a semi-cylinder, and the top 71 of the surface is correspondingly a vertex or top line, so that the surface body 70 can establish a point-to-surface contact matching or line-to-surface contact matching relationship with the reference surface 101.

[0074] Multiple guide rods 72 are provided at the inner end of the curved body 70, arranged alternately around the circumference. The axial directions of the guide rods 72 are all parallel and extend in the front-back direction, providing guidance and constraint during the front-back movement of the curved body 70. The guide rods 72 pass through through holes in the connecting plate 112 and continue to extend (forward) towards the connecting plate 113. A spring 721 is fitted onto the section of the guide rod 72 extending between the connecting plate 112 and the connecting plate 113, and a nut 722 is positioned at its end. Tightening the nut 722 adjusts the initial compression state of the spring 721 and applies an inward elastic force to the curved body 70.

[0075] One end of the transmission unit 80 is matched with the curved body 70, and the other end is matched with the sensing unit 90. During the process of the top 71 of the curved surface contacting and matching with the reference surface 101, the curved body 70 can be moved relative to the arm plate, so that the transmission unit 80 can transmit elastic force in the front-to-back direction between the curved body 70 and the sensing unit 90, and the sensing unit 90 can generate real-time sensing signals.

[0076] By comparing and analyzing the sensing signals of the sensing units 90 on the two positioning arms 111 (whether the difference between them exceeds the warning threshold range), the contact status between the two positioning arms 111 and the reference surface 101 can be determined. This helps to monitor and determine in real time whether the extension direction of the clamping plate relative to the bed 100 is in a compliant state. Furthermore, it enables real-time monitoring and supervision of the positioning status of the clamping plate on the track seat 200, ensuring that the entire assembly / welding process is always carried out under compliant conditions. It also allows for timely detection and overcoming of adverse interference from external factors (such as collisions, vibrations, and other routine or sudden situations). Therefore, it helps to better ensure the stability and reliability of the quality of the track seat 200 mounted on the bed 100.

[0077] A transmission rod 731 extending back and forth (along the axis) is provided on the inner end side of the curved body 70. Specifically, to achieve a compact structure, a countersunk hole 73 is formed on the inner end face of the curved body 70, and the root of the transmission rod 731 is connected to the inner bottom surface of the countersunk hole 73. Correspondingly, the transmission unit 80 includes a stud member 81 that matches the connecting plate 112 via a threaded structure, an annular member 82 fixed to the outer end side of the stud member 81, and a spring member 83 sleeved at the root of the transmission rod 731. The two ends of the spring member 83 respectively contact and match the end face of the annular member 82 and the end face of the curved body 70, or the inner bottom surface of the countersunk hole 73.

[0078] The stud 81 is threaded to the connecting plate 112. Tightening the stud 81 adjusts the front-to-back position of its two ends relative to the connecting plate 112, thereby adjusting the compression state of the spring 83 and thus regulating the front-to-back position of the curved body 70 and the magnitude of the elastic force it experiences in the front-to-back direction. A portion of the spring 83 and the annular member 82 are inserted into the countersunk hole 73, preferably with the inner diameter of the countersunk hole 73 larger than the outer diameter of the annular member 82 and the outer diameter of the spring 83.

[0079] An axial through hole is formed on the stud member 81, and the free end of the transmission rod 731 passes through the annular member 82 and exits the stud member 81 to match the sensing unit 90. During the movement of the curved body 70 relative to the arm plate, it causes / causes the sensing unit 90 to generate a real-time sensing signal. The axial through hole on the stud member 81 is formed as a multi-stage smooth through hole. The outer diameter of the transmission rod 731 is smaller than the inner diameter of the annular member 82, matches the inner diameter at the outer port (rear port) of the stud member 81, and is smaller than the inner diameter at other locations of the stud member 81.

[0080] The sensing unit 90 includes a cylindrical housing 91 that is threadedly matched with the connecting plate 113, a sensor body 92 disposed on the inner end side of the cylindrical housing 91, a transmission rod 93 disposed on the outer end side of the cylindrical housing 91, and a sensitive component 94 disposed within the cylindrical housing 91. The sensor body 92 and the sensitive component 94 are electrically connected.

[0081] The second transmission rod 93 can move relative to the cylindrical outer shell 91 in the front-rear direction. One end (rear end) of the second transmission rod 93 matches the first transmission rod 731, and the other end (front end) extends into the cylindrical outer shell 91 and matches the sensitive component 94. During the movement of the curved body 70 relative to the arm plate, the second transmission rod 93 can be driven by the first transmission rod 731 to cause the sensitive component 94 to produce a change in physical quantity, thereby causing / causing the sensor body 92 to generate a sensing signal.

[0082] The cylindrical outer shell 91 is threadedly matched with the connecting plate 113, allowing the front and rear ends of the cylindrical outer shell 91 to be adjusted relative to the connecting plate 113. This adjusts the matching state between the transmission rod 731 and the transmission rod 93, thereby setting the initial state of each sensing unit 90. This ensures that the initial states of multiple sensing units 90 are consistent (within the allowable error range). By comparing and analyzing the sensing signal status (reading values, etc.) of each sensing unit 90 with a preset warning threshold range, it can be determined whether the set position of the entire fixture relative to the bed 100 has been adjusted to and maintained in a compliant state.

[0083] The sensitive component 94 includes a fixed ring member 941 and a movable ring member 942 that can move relative to each other in the front-back direction, and a plurality of elastic bodies 943 (elastic bands) connected between the two (fixed ring member 941 and movable ring member 942) and distributed alternately around the circumference. Strain gauges are provided on the elastic bodies 943 and are connected to the sensor body 92.

[0084] The fixed annular component 941 can be in the form of a cylindrical tube, and multiple linear grooved rail structures extending in the front-back direction and distributed alternately around the circumference are provided on the cylindrical tube wall; the movable annular component 942 is provided with rail arms that correspond one-to-one with the linear grooved rail structures. The rail arms are inserted into the respective linear grooved rail structures, so that the movable annular component 942 can move relative to the fixed annular component 941 in the front-back direction (i.e., the axial direction of the cylindrical outer shell 91).

[0085] The fixed annular component 941 is fixedly matched with the inner wall of the cylindrical outer shell 91 via a threaded structure, and the movable annular component 942 is matched with the transmission rod 93. The forward and backward movement of the transmission rod 93 can drive the movable annular component 942 to move back and forth relative to the fixed annular component 941, and cause the elastic body 943 to undergo elastic deformation, thereby causing a change in the physical quantity of the strain gauge. The end of the transmission rod 731 can be inserted into the port of the cylindrical outer shell 91 and make relative contact with the transmission rod 93. At that time, the elastic deformation tension of the elastic body 943 can form a force that drives the transmission rod 93 to maintain a pressing contact state with the transmission rod 731. The part of the transmission rod 731 that extends into the port of the cylindrical outer shell 91 can establish a surface contact matching relationship with the cylindrical outer shell 91, and a front-to-back gap is formed between the opposing surfaces, forming a linear matching structure that can better constrain and guide the movement direction of the transmission rod 731. See [link to relevant documentation]. Figure 6 .

[0086] Specifically, one end of the elastic body 943 is fixedly connected to end ring 944, and end ring 944 is fixedly connected to the fixed ring member 941 or is an integrally formed structure; the other end of the elastic body 943 is fixedly connected to end ring 945, and end ring 945 is fixedly connected to the base plate 9421 of the moving ring member 942.

[0087] The base plate 9421 can be annular and have a threaded through hole. The transmission unit 80 may also include a screw cylinder 95 that matches the threaded through hole on the base plate 9421, and a thrust spring 96 sleeved on one end of the screw cylinder 95 near the sensor body 92.

[0088] The thrust spring 96 extends into the recessed portion located at the end of the sensor body 92, and can apply an elastic force in the front-to-back direction to the moving ring 942, which helps to ensure that the moving ring 942 can be fully reset relative to the fixed ring 941 during operation.

[0089] One end of the screw cylinder 95 has a radial flange, with the outer diameter of the radial flange being larger than the inner diameter of the end ring 945. The other end of the screw cylinder 95 passes through the end ring 945 and matches a threaded through hole on the base plate 9421. It extends towards the sensor body 92 relative to the base plate 9421 and engages with one end of the thrust spring 96. Twisting the screw cylinder 95 pulls the end ring 945 towards the base plate 9421, causing the elastic body 943 to fully unfold and set the initial state of the strain gauge.

[0090] A radial flange 931 is provided at the end of the transmission rod 93, which can extend into the screw cylinder 95, so that the transmission rod 93 can work together with the thrust spring 96 to apply an elastic force in the front-to-back direction to the moving ring 942. The radial flange 931 has a hole structure for connecting the strain gauge (not shown) and the data cable of the sensor body 92 to pass through.

[0091] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Many aspects of the present invention can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A welding fixture for the bed of a metal cutting machine, characterized in that: It includes a support seat 1 (10) and a support seat 2 (20) arranged opposite to each other in front and back, a pair of inner side plates (30) and a pair of outer side plates (40) extending in the front and back direction, and a plurality of first slides (50) that match the support seat 1 (10) and a plurality of second slides (60) that match the support seat 2 (20) respectively through slide structures extending in the left and right directions. Support base 1 (10) includes a base body (11) and a longitudinal beam (12); a first slide (50) matches the base body (11); two positioning arms (111) are provided on the rear side of the base body (11) in alternating left and right positions. The second support base (20) is provided with a shaped hole that matches the longitudinal beam (12) through a sliding rail structure that extends back and forth, so that the second support base (20) can move back and forth relative to the seat body (11); the second support base (20) is provided with a set bolt (22) whose screw end can extend into the shaped hole and contact and separate from the upper end face of the longitudinal beam (12); the front side of the second support base (20) is provided with a plurality of pressure arm units (21) distributed alternately on the left and right sides; the pressure arm unit (21) includes a slider (212) that can controllably move back and forth relative to the second support base (20); a plurality of pressure arms (2121) are formed on the end face of the slider (212) facing the seat body (11). One end of the inner clamping plate (30) and one end of the outer clamping plate (40) are respectively fixed on each of the first slides (50), and the other end is matched with the second slide (60); the two inner clamping plates (30) are adjacent to each other and arranged alternately; the two outer clamping plates (40) are respectively located on the outside of the two inner clamping plates (30); The second slide (60) is provided with a shaped hole that matches the other end of the inner clamping plate (30) and the other end of the outer clamping plate (40) through a slide rail structure that extends back and forth, so that each clamping plate can move back and forth relative to the second slide (60); the second slide (60) is provided with a set bolt (61) whose screw end extends into the shaped hole and contacts and separates from the upper end face of the inner clamping plate (30) and the upper end face of the outer clamping plate (40).

2. The bed welding fixture of the metal cutting machine according to claim 1, characterized in that: The support base (20) has a groove that matches the pressure arm unit (21); the pressure arm unit (21) also includes an assembly slide (211) and a drive assembly; the slider (312) matches the assembly slide (211) through a linear track structure; the drive assembly can selectively switch the slider (312) between a state that can move relative to the assembly slide (211) and a state that is fixed relative to the assembly slide (211); The assembly slide (211) is matched with the groove by a left-right extending track structure, so that the assembly slide (211) can move relative to the support seat (20).

3. The bed welding fixture of the metal cutting machine according to claim 2, characterized in that: The drive assembly includes a stud (213), a return spring (214), a nut (215), and a bolt (216); the slider (212) is disposed in the seat cavity of the mounting slide (211); the side wall of the mounting slide (211) is provided with a U-shaped body (2111) and a through hole that matches the stud (213); One end of the double-ended stud (213) is fixedly connected to the slider (212), and the other end extends into the U-shaped body (2111) and is fitted with a return spring (214) and a nut (215) is configured; the bolt (216) is threadedly matched with the top wall of the U-shaped body (2111), and its free end can contact and match with the other end of the double-ended stud (213).

4. The bed welding fixture of the metal cutting machine according to claim 3, characterized in that: A countersunk hole is formed on the free end face of the bolt (216); the other end of the stud (213) can extend into the countersunk hole, and the other end face of the stud (213) contacts and matches the inner bottom surface of the countersunk hole.

5. The bed welding fixture of the metal cutting machine according to claim 1, characterized in that: The inner clamping plate (30) is provided with multiple L-shaped cantilever (31) arranged alternately in front and behind; the outer clamping plate (40) is provided with boss (41) corresponding to and matching the L-shaped cantilever (31). The L-shaped cantilever (31) includes a vertically extending arm (311) and a horizontal arm (312) extending toward the adjacent outer side plate (40); the lower end face of the horizontal arm (312) is in the same plane as the upper end face of the boss (41). At least one transverse straight groove (3121) extending inward from its free end is formed on the cross arm (312); a plurality of studs (42) corresponding to the transverse straight groove (3121) are formed on the upper part of the boss (41); the root of the stud (42) can extend into the transverse straight groove (3121), and a nut (43) is provided at the end of the stud (42); tightening the nut (43) can fix the cross arm (312) above the boss (41).

6. The bed welding fixture of the metal cutting machine according to claim 5, characterized in that: Multiple strip-shaped protrusions are formed on the upper surface of the boss (41), which are distributed alternately front and back; the length extension direction of the strip-shaped protrusions is consistent with the length direction of the cross arm (312); the top surface of the strip-shaped protrusions is formed as a semi-cylindrical surface, and the top of the semi-cylindrical surface can contact and match the lower end surface of the cross arm (312).

7. The bed welding fixture of the metal cutting machine according to claim 5, characterized in that: The number of transverse straight grooves (3121) provided on the cross arm (312) is multiple, and the multiple transverse straight grooves (3121) are distributed alternately front and back; the boss (41) and the transverse straight groove (3121) are matched one by one, and the root of the stud (42) on each boss (41) can be inserted into each transverse straight groove (3121) respectively.

8. The bed welding fixture of the metal cutting machine according to claim 5 or 7, characterized in that: A sleeve (44) is fitted at the root of the stud (42); the sleeve (44) can be inserted into the transverse straight groove (3121), and the outer diameter of the sleeve (44) is consistent with the groove width of the transverse straight groove (3121).

9. The bed welding fixture of the metal cutting machine according to claim 1, characterized in that: The positioning arm (111) includes two arm plates arranged alternately in the vertical direction, and a connecting plate one (112) and a connecting plate two (113) are provided between the inner sides of the free ends of the two arm plates and are arranged alternately in front and behind; the connecting plate two (113) is located on the inner side opposite to each other; It also includes a curved body (70) that matches the two arm plates through the track structure that extends forward and backward, a transmission unit (80) provided on the first connecting plate (112), and a sensing unit (90) provided on the second connecting plate (113). The top (71) of the curved surface (70) faces outward and can extend to the outside of the arm plate; multiple guide rods (72) are provided at the inner end of the curved surface (70) and are distributed alternately around the circumference; the guide rods (72) pass through the through hole provided on the connecting plate one (112) and continue to extend and approach the connecting plate two (113); a spring element one (721) and a nut two (722) are sleeved on the section of the guide rod (72) that extends between the connecting plate one (112) and the connecting plate two (113); One end of the transmission unit (80) is matched with the curved body (70), and the other end is matched with the sensing unit (90). It can transmit elastic force in the front-back direction between the curved body (70) and the sensing unit (90), so that the sensing unit (90) can generate sensing signals in real time.

10. The bed welding fixture of the metal cutting machine according to claim 9, characterized in that: A transmission rod (731) extending forward and backward is provided on the inner end side of the curved body (70). The transmission unit (80) includes a stud (81) that matches the connecting plate (112) via a threaded structure, an annular part (82) fixed on the outer end of the stud (81), and a spring part (83) sleeved at the root of the transmission rod (731). An axial through hole is formed on the stud (81), and the free end of the transmission rod (731) passes through the annular part (82) and matches the sensing unit (90) after passing through the stud (81). During the movement of the curved body (70) relative to the arm plate, the sensing unit (90) generates a sensing signal.

Images