Positioning tool for welding machine tool components

Abstract

The present invention belongs to the field of welding and positioning of machine tool components, and specifically is a positioning tool for welding machine tool components, including a positioning member arranged on the upper part of the machine tool body, the positioning member is spliced ​​together by a plurality of rectangular plates, a groove is provided inside the rectangular plate, a spacing mechanism for spacing the distance between two guide rail seats placed on the machine tool body is provided in the groove, the spacing mechanism includes a driving assembly and a spacing assembly, and the driving assembly includes a toothed plate provided in the groove. The present invention accurately controls the distance between the two guide rail seats and the distance between the two guide rail seats and the front and rear sides of the machine tool bed through the mechanical transmission of the spacing mechanism and the scale adjustment of the positioning assembly, effectively solving the positioning deviation problem caused by the lack of a quantitative reference in manual welding, ensuring the accuracy of the position of the guide rail seat after welding, and adapting to guide rail seats of different sizes through a plug-in modular structure of multiple rectangular plates, thereby improving the versatility of the tool.

Description

Technical Field

[0001] The invention relates to the field of welding positioning of machine tool components, in particular to a positioning tool for welding machine tool components. Background Art

[0002] During machine tool manufacturing, guide rails are critical components that support the machine's motion accuracy. The quality of their weld to the machine bed directly impacts the machine's overall performance. To ensure the relative positional accuracy of the guide rails and the machine bed during welding, positioning fixtures are essential auxiliary equipment. Currently, both manual and machine welding require the use of positioning fixtures for pre-weld positioning.

[0003] In manual welding scenarios, workers typically use simple fixtures or manually adjusted positioning components to secure the guide rail base. For example, they use bolt clamps, angle iron brackets, and other fixtures to temporarily secure the guide rail base to a preset position on the machine bed. These positioning fixtures often rely on the worker's experience for installation and adjustment, making the operation cumbersome and difficult to guarantee accuracy. Furthermore, manually adjusted positioning components lack a quantitative positioning reference, leading to significant variability between workers, resulting in guide rail base positioning deviations, which in turn causes the guide rails to fail to meet straightness and parallelism standards after welding.

[0004] Machine welding, such as automated welding machines or industrial robotic welding systems, is typically equipped with customized positioning fixtures that utilize pneumatic or hydraulic drive mechanisms to quickly position and clamp the guide rails. However, the complex structure of machine welding positioning fixtures not only increases investment costs but also increases equipment maintenance difficulties. Furthermore, the need to replace the matching positioning fixtures for guide rails of different sizes increases commissioning time. Both positioning methods have certain shortcomings. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present application provides a positioning tool for welding machine tool components, which can not only accurately position the guide rail seat, but also position guide rail seats of different sizes, and reduce subsequent maintenance costs through splicing.

[0006] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions: The present invention provides a positioning tool for welding machine tool components, including a positioning piece arranged on the upper part of the machine tool body, the positioning piece is spliced ​​by several rectangular plates, a groove is provided inside the rectangular plate, and a spacing mechanism is provided in the groove for spacing the distance between two guide rail seats placed on the machine tool body.

[0007] The distance mechanism includes a driving assembly and a distance assembly, the driving assembly includes a toothed plate arranged in a groove, the distance assembly includes two rotating shafts symmetrically distributed front and back and arranged in the groove, a gear meshing with the toothed plate is fixedly provided on the outer upper end of the rotating shaft, a rotating plate is fixedly provided on the outer lower end of the rotating shaft, a distance wheel is rotatably provided on one side of the rotating plate passing through the groove, and the outer side of the distance wheel contacts one side of the guide rail seat.

[0008] The upper part of the rectangular plate is provided with a clamping assembly for clamping the two guide rails after the distance is determined. The clamping assembly includes a connecting rod fixedly provided on the upper part of the rectangular plate, a sleeve is slidably provided on the connecting rod, and telescopic parts are provided on the front and rear sides of the sleeve.

[0009] The two rectangular plates on the left and right sides are each provided with a fixing component on the side away from each other, and the two fixing components are each provided with a positioning component for aligning and positioning the guide rail seat on the left and right sides on the side close to each other.

[0010] According to a favorable embodiment, the drive assembly also includes a threaded rod rotatably arranged in the groove, a rectangular block is fixedly arranged on the right end of the threaded rod, and a rectangular opening is opened at the left end of the threaded rod for use with the rectangular blocks on adjacent spacing mechanisms. The threaded rods on two adjacent spacing mechanisms are connected by plugging the corresponding rectangular blocks into the corresponding rectangular openings. A threaded sleeve is threaded on the threaded rod, and the upper part of the threaded sleeve is fixedly connected to the bottom of the tooth plate.

[0011] According to an advantageous embodiment, a turntable is provided on the left side of the rectangular plate on the left, an insert block cooperating with the rectangular opening is fixedly provided on the right side of the turntable, and the insert block is plugged into the rectangular opening located on the far left.

[0012] According to a favorable embodiment, the clamping assembly also includes a connecting ring slidably arranged on the connecting rod, and the upper part of the tube sleeve is rotatably connected to the bottom of the connecting ring, and the outer side of the connecting rod is provided with a reset spring 1, and the end of the reset spring 1 away from the connecting rod is connected to the upper part of the connecting ring.

[0013] According to a favorable embodiment, the telescopic member includes a second return spring slidably arranged inside the tube sleeve, and a moving rod is fixedly arranged at one end of the return spring away from the connecting rod. The end of the moving rod away from the second return spring passes through the interior of the tube sleeve and is fixedly provided with a clamping block, and the side of the clamping block close to the connecting rod abuts against one side of the guide rail seat.

[0014] According to an advantageous embodiment, two limiting rods symmetrically distributed front and back are fixedly provided on the upper portion of the rectangular plate, and two limiting openings symmetrically distributed front and back and used in conjunction with the two limiting rods are opened on the bottom of the rectangular plate.

[0015] According to an advantageous embodiment, the fixing assembly includes a mounting plate arranged on one side of the corresponding rectangular plate by two bolts, and a locking member for locking the mounting plate to the machine tool body is fixedly arranged on one side of the two mounting plates close to each other.

[0016] According to a favorable embodiment, the positioning assembly includes two horizontal plates fixedly arranged on one side of the mounting plate close to the rectangular plate and symmetrically distributed front to back, a slide plate is slidingly arranged between the two horizontal plates, the slide plate and the corresponding rectangular plate are locked by bolt 2, and positioning plates are fixedly arranged at the bottom of the two vertical sections of the slide plate, the side of the positioning plate close to the guide rail seat is in contact with the guide rail seat, and the side of the horizontal plate close to the guide rail seat and the upper part of the horizontal plate are both provided with scales.

[0017] According to a favorable embodiment, docking blocks are fixedly provided at the right ends of the front and rear sides of the rectangular plate, and rectangular shells used in conjunction with the docking blocks are fixedly provided at the left ends of the front and rear sides of the rectangular plate, and adjacent docking blocks are plugged into the rectangular shells and locked by positioning pins.

[0018] According to a favorable embodiment, a guide opening connected to the groove is opened at the inner upper end of the rectangular plate, a guide block is fixedly provided on the upper part of the tooth plate, the upper part of the guide block passes through the guide opening and is slidably connected to the guide opening, and a plurality of balls are provided at the bottom of the rectangular plate, and the outer sides of the balls are in rolling contact with the upper part of the machine tool body.

[0019] Compared with the prior art, the positioning tooling for welding machine tool components provided by an embodiment of the present invention has the following beneficial effects: 1. The present invention accurately controls the spacing between the two guide rail seats and the distance between the two guide rail seats and the front and rear sides of the machine tool bed through the mechanical transmission of the distance mechanism and the scale adjustment of the positioning component, effectively solving the positioning deviation problem caused by the lack of quantitative reference in manual welding, ensuring the accuracy of the position of the guide rail seat after welding, and through a plurality of rectangular plate plug-in modular structures, it can adapt to guide rail seats of different sizes, thereby improving the versatility of the tooling.

[0020] 2. The present invention is provided with a driving assembly and a distance assembly, which drives the threaded rod to move the gear plate, gear and distance wheel by rotating the turntable. At this time, the distance between the two guide rail seats can be accurately adjusted by the scale on the cross plate, and then the positioning assembly can be used to realize the lateral alignment of the two guide rail seats and the precise adjustment of the distance between the two guide rail seats and the machine tool bed, thereby ensuring the welding accuracy of the guide rail seats and solving the problem of no reference in traditional positioning and deviation during welding.

[0021] 3. The rectangular plates and threaded rods in the present invention both adopt a plug-in modular structure. The number of rectangular plates can be freely increased or decreased according to the length of the guide rail seat. The splicing structure is quickly locked by positioning pins, and can be adapted to guide rail seats of different sizes. No customized chemical equipment is required. At the same time, components in the modular structure (such as a single rectangular plate, threaded rod) can be replaced independently when damaged, without the need to replace the entire tooling. Compared with traditional machine welding positioning tooling, the maintenance cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 It is a cross-sectional structural diagram of the positioning member in the present invention.

[0024] Figure 3 This is a structural diagram of the separation of the threaded rod and the turntable in the present invention.

[0025] Figure 4 This is a structural diagram of the separation of two adjacent threaded rods in the present invention.

[0026] Figure 5 It is a cross-sectional structural diagram of the clamping assembly in the present invention.

[0027] Figure 6 This is a first-perspective connection diagram of the rectangular plate and the fixing assembly in the present invention.

[0028] Figure 7 This is a second perspective view of the connection structure of the rectangular plate and the fixing assembly in the present invention.

[0029] Figure 8 This is a structural diagram of the connection between the locking member and the machine tool in the present invention.

[0030] Figure 9 This is a diagram showing the connection state between the clamping assembly and the rectangular plate when not in use.

[0031] Reference numerals in the figure: 1, machine tool bed; 2, positioning member; 3, rectangular plate; 4, guide rail seat; 5, distance mechanism; 51, driving assembly; 511, tooth plate; 512, threaded rod; 513, rectangular block; 514, rectangular opening; 515, threaded sleeve; 52, distance assembly; 521, rotating shaft; 522, gear; 523, rotating plate; 524, distance wheel; 53, clamping assembly; 531, connecting rod; 532, sleeve ; 533, telescopic part; 534, connecting ring; 535, reset spring 1; 536, reset spring 2; 537, moving rod; 538, clamping block; 6, fixing assembly; 61, mounting plate; 62, locking piece; 63, positioning assembly; 631, cross plate; 632, slide plate; 633, positioning plate; 7, turntable; 8, insert block; 9, limit rod; 10, limit port; 11, docking block; 12, rectangular shell; 13, guide block. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 - Figure 9 This application is described in further detail.

[0033] Please refer to Figure 1 and Figure 2 A positioning fixture for welding machine tool components includes a positioning piece 2 arranged on the upper part of the machine tool bed 1. The positioning piece 2 is composed of several rectangular plates 3. A groove is opened inside the rectangular plate 3. A spacing mechanism 5 is provided in the groove for locating the distance between two guide rail seats 4 placed on the machine tool bed 1.

[0034] See Figure 2 、 Figure 3 and Figure 4 The distance mechanism 5 includes a driving component 51 and a distance component 52. The driving component 51 includes a tooth plate 511 arranged in a groove. The driving component 51 also includes a threaded rod 512 rotatably arranged in the groove. A rectangular block 513 is fixedly provided at the right end of the threaded rod 512. A rectangular opening 514 is opened at the left end of the threaded rod 512 for use with the rectangular block 513 on the adjacent distance mechanism 5. The threaded rods 512 on two adjacent distance mechanisms 5 are connected by plugging the corresponding rectangular blocks 513 with the corresponding rectangular openings 514. A threaded sleeve 515 is threadedly provided on the threaded rod 512, and the upper part of the threaded sleeve 515 is fixedly connected to the bottom of the tooth plate 511.

[0035] See Figure 2 and Figure 3 The right ends of the front and rear sides of the rectangular plate 3 are fixed with docking blocks 11, and the left ends of the front and rear sides of the rectangular plate 3 are fixed with rectangular shells 12 used in conjunction with the docking blocks 11. The adjacent docking blocks 11 are plugged into the rectangular shells 12 and locked by positioning pins.

[0036] When welding the guide rail seat 4 to the machine tool bed 1, the staff first places the two guide rail seats 4 to be welded on the machine tool bed 1, and then selects an appropriate number of rectangular plates 3 according to the length of the guide rail seat 4 and places them on the machine tool bed 1, and multiple rectangular plates 3 are located between the two guide rail seats 4. Then, when splicing multiple rectangular plates 3, the docking blocks 11 on the front and rear sides of the rectangular plates 3 are inserted into the corresponding rectangular shells 12 on the adjacent rectangular plates 3, and at the same time, the rectangular opening 514 at the left end of the previous threaded rod 512 is accurately plugged into the rectangular block 513 at the right end of the subsequent threaded rod 512 to achieve coaxial splicing of adjacent threaded rods 512 to form a continuous drive shaft structure. Then, a positioning pin is used to pass through the preset pin holes of the docking block 11 and the rectangular shell 12 to firmly lock the adjacent rectangular plates 3 to ensure that the overall positioning part 2 after splicing is stable to avoid displacement during use. The splicing method of multiple rectangular plates 3 is used to facilitate the positioning of guide rail seats 4 of different sizes.

[0037] See Figure 1 、 Figure 6 、 Figure 7 and Figure 8 A fixing assembly 6 is provided on the side of the two rectangular plates 3 on the left and right sides that are away from each other. The fixing assembly 6 includes a mounting plate 61 that is arranged on one side of the corresponding rectangular plate 3 by two bolts. A locking piece 62 (the locking piece 62 is an existing push-pull quick clamp) that locks the mounting plate 61 to the machine tool bed 1 is fixed on the side of the two mounting plates 61 that are close to each other.

[0038] See Figure 1 、 Figure 6 and Figure 7 , the two fixing components 6 are each provided with a positioning component 63 for aligning the guide rail seat 4 left and right on the side close to each other. The positioning component 63 includes two horizontal plates 631 fixedly arranged on the side of the mounting plate 61 close to the rectangular plate 3 and symmetrically distributed front and back. A slide plate 632 is slidingly arranged between the two horizontal plates 631. The slide plate 632 is locked with the corresponding rectangular plate 3 by bolt 2. The bottom of the two vertical sections of the slide plate 632 is fixedly provided with a positioning plate 633. The side of the positioning plate 633 close to the guide rail seat 4 is in contact with the guide rail seat 4, and the side of the positioning plate 633 close to the guide rail seat 4 and the upper part of the horizontal plate 631 are both provided with scales.

[0039] After the multiple rectangular plates 3 are spliced ​​together, the staff can install the mounting plate 61 on the corresponding rectangular plate 3 by means of bolt 1. At this time, one side of the mounting plate 61 is in contact with the outer side of the machine tool bed 1. Then the staff pushes the slides 632 on both sides to drive the multiple positioning plates 633 on both sides to approach each other. During the pushing process, observe the scale marks on the upper part of the cross plate 631, and use the scale values ​​on both sides as a reference to ensure that the moving distances of the slides 632 on both sides are consistent. After the positioning plate 633 is in contact with the guide rail seat 4, stop moving the slide 632, and then lock the slide 632 by means of bolt 2. At this time, the scale on the cross plate 631 can be used to ensure that the left and right sides of the two guide rail seats 4 are at the same distance from the left and right sides of the machine tool bed 1, thereby achieving the horizontal alignment of the guide rail seats 4 and completing the preliminary positioning of the two guide rail seats 4.

[0040] See Figure 1 、 Figure 5 and Figure 9 A clamping assembly 53 for clamping the two guide rail seats 4 after the distance is fixed is provided on the upper part of the rectangular plate 3. The clamping assembly 53 includes a connecting rod 531 fixedly provided on the upper part of the rectangular plate 3, and a sleeve 532 is slidably provided on the connecting rod 531. Telescopic parts 533 are provided on the front and rear sides of the sleeve 532. The telescopic part 533 includes a return spring 2 536 slidably provided inside the sleeve 532. A moving rod 537 is fixedly provided on the end of the return spring 2 536 away from the connecting rod 531. The end of the moving rod 537 away from the return spring 2 536 passes through the interior of the sleeve 532 and is fixedly provided with a clamping block 538. The side of the clamping block 538 close to the moving rod 537 abuts against one side of the guide rail seat 4.

[0041] See Figure 5 The clamping assembly 53 also includes a connecting ring 534 slidably arranged on the connecting rod 531, and the upper part of the sleeve 532 is rotatably connected to the bottom of the connecting ring 534. A return spring 535 is provided on the outer side of the connecting rod 531, and the end of the return spring 535 away from the connecting rod 531 is connected to the upper part of the connecting ring 534.

[0042] See Figure 5 and Figure 9 Two limiting rods 9 symmetrically distributed front and back are fixedly provided on the upper part of the rectangular plate 3, and two limiting openings 10 symmetrically distributed front and back and used in conjunction with the two limiting rods 9 are opened at the bottom of the sleeve 532.

[0043] After the two guide rail seats 4 are initially positioned, the staff can push the two guide rail seats 4 to contact the front and rear sides of the positioning member 2 respectively, and then the staff can pull the sleeve 532 to move upward, so that the sleeve 532 moves out from between the two limit rods 9. During this process, the sleeve 532 drives the connecting ring 534 to move upward synchronously, compressing the reset spring 1 535. When the bottom of the clamping block 538 is higher than the upper part of the guide rail seat 4, the upward movement is stopped and the sleeve 532 is rotated. Then, the two moving rods 537 are pulled away from each other. The movement of the moving rod 537 stretches the reset spring 2 536. When the clamping block 538 After avoiding the upper space of the guide rail seat 4, stop pulling the moving rod 537, and then release the sleeve 532. At this time, the elastic force of the reset spring 1 535 can drive the sleeve 532 to move downward, so that the limit rod 9 can be inserted into the limit opening 10, which not only limits the sleeve 532, but also ensures that the clamping block 538 and the guide rail seat 4 are in a vertical state. Then release the moving rod 537, and the elastic force of the reset spring 2 536 can drive the clamping block 538 to approach the guide rail seat 4 and fit tightly against the outer side of the guide rail seat 4. At this time, the two guide rail seats 4 can be fit tightly against the positioning member 2.

[0044] See Figure 1 and Figure 3 A turntable 7 is provided on the left side of the left rectangular plate 3, and an insert block 8 that cooperates with the rectangular opening 514 is fixedly provided on the right side of the turntable 7, and the insert block 8 is plugged into the rectangular opening 514 located on the far left.

[0045] See Figure 1 and Figure 2 The distance component 52 includes two rotating shafts 521 that are symmetrically distributed front and back and are rotatably arranged in the groove. A gear 522 that meshes with the tooth plate 511 is fixedly arranged at the upper end of the outer side of the rotating shaft 521, and a rotating plate 523 is fixedly arranged at the lower end of the outer side of the rotating shaft 521. A distance wheel 524 is rotatably arranged on one side of the rotating plate 523 that passes through the groove, and the outer side of the distance wheel 524 contacts one side of the guide rail seat 4.

[0046] See Figure 3 A guide port connected to the groove is opened at the upper end of the inner part of the rectangular plate 3, and a guide block 13 is fixedly provided on the upper part of the tooth plate 511. The upper part of the guide block 13 passes through the guide port and is slidably connected to the guide port. A plurality of balls are provided at the bottom of the rectangular plate 3, and the outer sides of the balls are in rolling contact with the upper part of the machine tool bed 1.

[0047] After the guide rail seat 4 and the positioning piece 2 are in close contact, the staff inserts the plug block 8 on the turntable 7 into the rectangular opening 514 on the far left, ensuring that the plug block 8 and the rectangular opening 514 are tightly matched to realize the assembly connection between the turntable 7 and the threaded rod 512. Then the turntable 7 can be rotated to drive all the spliced ​​threaded rods 512 to rotate synchronously. The rotation of the threaded rod 512 can drive the threaded sleeve 515 to move through the cooperation of the guide block 13 and the guide opening. The movement of the threaded sleeve 515 drives the tooth plate 511 to move. The movement of the tooth plate 511 can drive the two gears 522 to rotate. The rotation of the gear 522 drives the rotating plate 523 to rotate. The rotating plate 523 rotates. The distance wheel 524 is driven to rotate. When the distance wheel 524 contacts the guide rail seat 4, as the distance wheel 524 continues to rotate, it will push the guide rail seat 4 to slide on the machine tool bed 1. When the guide rail seat 4 moves, observe the scale on the positioning plate 633, so that the moving position of the guide rail seat 4 can be monitored by using the scale on the positioning plate 633. When it is found that the guide rail seat 4 has moved to the specified position by observing the scale on the positioning plate 633, the turntable 7 is stopped, and then the distance between the two guide rail seats 4 can be adjusted by the cooperation of the distance wheel 524 and the clamping block 538 to ensure that the distance between the two guide rail seats 4 meets the welding requirements.

[0048] Then push the positioning part 2 to move. At this time, the two guide rail seats 4 move synchronously with the positioning part 2. Then observe the corresponding scales on the front and rear sides of the machine tool bed 1 and the positioning plate 633, so that the distance between the rear guide rail seat 4 and the rear side of the machine tool bed 1, and the distance between the front guide rail seat 4 and the front side of the machine tool bed 1 reach the set value, thereby completing the precise positioning of the two guide rail seats 4 on the machine tool bed 1, and then use the locking part 62 to lock the mounting plate 61 and the machine tool bed 1. Finally, the guide rail seat 4 can be welded.

[0049] During the specific work, the guide rail seat 4 to be welded is placed on the machine tool bed 1, and an appropriate number of rectangular plates 3 are selected according to the length of the guide rail seat 4. Multiple rectangular plates 3 and threaded rods 512 are spliced ​​by plugging. Then, the mounting plate 61 is installed on the rectangular plates 3 on the left and right sides by bolt 1, and then the slides 632 on both sides are pushed to move the positioning plate 633 synchronously according to the scale on the horizontal plate 631. After the positioning plate 633 is fitted with the guide rail seat 4, the slide 632 is locked by bolt 2 to achieve horizontal alignment of the two guide rail seats 4.

[0050] Next, push the two guide rail seats 4 to fit with the positioning member 2, then pull up the sleeve 532 for a distance and rotate the sleeve 532, then use the telescopic member 533 to clamp the guide rail seat 4, then insert the plug 8 on the turntable 7 into the rectangular opening 514 of the leftmost threaded rod 512, rotate the turntable 7 to drive the threaded rod 512 to rotate, and drive the gear plate 511 to move through the threaded sleeve 515, so that the gear 522, the rotating plate 523 and the fixed distance wheel 524 rotate, and the fixed distance wheel 524 rotates to push the guide rail seat 4 to move on the machine bed 1, and observe the cross plate 631. Scale, stop rotating the turntable 7 after the guide rail seat 4 moves to the specified position, so that the distance between the two guide rail seats 4 can be adjusted, and then push the two guide rail seats 4 to move synchronously, observe the front and rear sides of the machine tool bed 1 and the corresponding scales on the positioning plate 633, so that the distance between the rear guide rail seat 4 and the rear side of the machine tool bed 1, and the distance between the front guide rail seat 4 and the front side of the machine tool bed 1 reach the set value, and finally lock the mounting plate 61 on the machine tool bed 1 through the locking piece 62, ensuring the accuracy of the position of the two guide rail seats 4 welded to the machine tool bed 1.

[0051] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A positioning fixture for welding machine tool components, comprising a positioning member arranged on the upper part of the machine tool body, characterized in that: The positioning member is formed by splicing a plurality of rectangular plates, the interior of which is provided with a groove, and a spacing mechanism for locating the distance between the two guide rail seats placed on the machine tool body is provided in the groove; The distance mechanism includes a driving assembly and a distance assembly, the driving assembly includes a toothed plate arranged in a groove, the distance assembly includes two rotating shafts rotatably arranged in the groove and symmetrically distributed front and back, a gear meshing with the toothed plate is fixedly provided on the outer upper end of the rotating shaft, a rotating plate is fixedly provided on the outer lower end of the rotating shaft, a distance wheel is rotatably provided on one side of the rotating plate passing through the groove, and the outer side of the distance wheel contacts one side of the guide rail seat; The upper part of the rectangular plate is provided with a clamping assembly for clamping the two guide rails after the distance is determined. The clamping assembly includes a connecting rod fixedly provided on the upper part of the rectangular plate, a sleeve is slidably provided on the connecting rod, and telescopic parts are provided on the front and rear sides of the sleeve; The two rectangular plates on the left and right sides are each provided with a fixing assembly on the side away from each other, and the two fixing assemblies are each provided with a positioning assembly on the side close to each other for aligning and positioning the guide rail seat left and right; The driving assembly also includes a threaded rod rotatably arranged in the groove, a rectangular block is fixedly arranged on the right end of the threaded rod, and a rectangular opening is opened at the left end of the threaded rod for use with the rectangular blocks on the adjacent spacing mechanisms. The threaded rods on the two adjacent spacing mechanisms are connected by plugging the corresponding rectangular blocks into the corresponding rectangular openings. A threaded sleeve is threaded on the threaded rod, and the upper part of the threaded sleeve is fixedly connected to the bottom of the tooth plate.

2. A positioning fixture for welding machine tool components according to claim 1, characterized in that: A turntable is provided on the left side of the rectangular plate on the left side, and an inserting block that matches the rectangular opening is fixedly provided on the right side of the turntable, and the inserting block is plugged into the rectangular opening located on the far left.

3. A positioning fixture for welding machine tool components according to claim 1, characterized in that: The clamping assembly also includes a connecting ring slidably arranged on the connecting rod, and the upper part of the tube sleeve is rotatably connected to the bottom of the connecting ring. The outer side of the connecting rod is provided with a reset spring 1, and the end of the reset spring 1 away from the connecting rod is connected to the upper part of the connecting ring.

4. A positioning fixture for welding machine tool components according to claim 1, characterized in that: The telescopic part includes a return spring 2 which is slidably arranged inside the tube sleeve. A moving rod is fixedly arranged on one end of the return spring 2 away from the connecting rod. The end of the moving rod away from the return spring 2 passes through the interior of the tube sleeve and is fixedly provided with a clamping block. The side of the clamping block close to the connecting rod abuts against one side of the guide rail seat.

5. A positioning fixture for welding machine tool components according to claim 1, characterized in that: Two limiting rods symmetrically distributed front and back are fixedly provided on the upper part of the rectangular plate, and two limiting openings symmetrically distributed front and back and used in conjunction with the two limiting rods are opened on the bottom of the rectangular plate.

6. A positioning fixture for welding machine tool components according to claim 1, characterized in that: The fixing assembly includes a mounting plate arranged on one side of the corresponding rectangular plate through two bolts, and a locking piece for locking the mounting plate and the machine tool body is fixedly arranged on one side of the two mounting plates close to each other.

7. A positioning fixture for welding machine tool components according to claim 6, characterized in that: The positioning assembly includes two horizontal plates fixedly arranged on one side of the mounting plate close to the rectangular plate and symmetrically distributed front to back, a slide plate slidingly arranged between the two horizontal plates, the slide plate and the corresponding rectangular plate are locked by bolt 2, and positioning plates are fixedly arranged at the bottom of the two vertical sections of the slide plate, the side of the positioning plate close to the guide rail seat is in contact with the guide rail seat, and scales are provided on the side of the horizontal plate close to the guide rail seat and the upper part of the horizontal plate.

8. A positioning fixture for welding machine tool components according to claim 1, characterized in that: The right ends of the front and rear sides of the rectangular plate are fixed with docking blocks, and the left ends of the front and rear sides of the rectangular plate are fixed with rectangular shells used in conjunction with the docking blocks. Adjacent docking blocks are plugged into the rectangular shells and locked by positioning pins.

9. A positioning fixture for welding machine tool components according to claim 1, characterized in that: A guide opening connected to the groove is provided at the inner upper end of the rectangular plate, a guide block is fixedly provided on the upper part of the tooth plate, the upper part of the guide block passes through the guide opening and is slidably connected to the guide opening, a plurality of balls are provided at the bottom of the rectangular plate, and the outer sides of the balls are in rolling contact with the upper part of the machine tool body.

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