WO2024227397A1 - Numerical control steel pipe marking machine - Google Patents

Abstract

A numerical control steel pipe marking machine, comprises a machine table (1), a marking die (2) and a lower die assembly (3) mounted on the machine table (1). A first driving assembly (4) used for driving the marking die (2) to slide downwards is arranged on the machine table (1), and a second driving assembly (5) used for driving the marking die (2) to horizontally slide is further arranged on the machine table (1). The marking die (2) comprises a marking guide plate (6) and a die head (7) mounted on the marking guide plate (6). A mounting groove (8) is formed in the marking guide plate (6), the die head (7) vertically slides in the mounting groove (8), and a first spring (9) is arranged between the die head (7) and the inner wall of the mounting groove (8). An adjustment rod (10) is rotatably arranged in the mounting groove (8), and an abutting block (11) is fixedly arranged on the adjustment rod (10). A screwing assembly (12) is arranged at one end of the adjustment rod (10) extending out of the marking guide plate (6), and is used for driving the adjustment rod (10) to rotate. During adjustment, the adjustment rod (10) is driven to rotate, so as to cause the abutting block (11) to abut against the die head (7) to enable same to vertically move downwards. The marking machine can achieve fine adjustment of the die head.

Description

A CNC steel tube letter rolling machine Technical Field

The present application relates to the field of letter rolling machines, and in particular to a CNC steel tube letter rolling machine.

Background Art

Torque wrenches have been widely used in tightening bolts. There is a split-card torque wrench with torque force value marks on the steel pipe of the wrench. Some are made with a laser marking machine, but the marking is very shallow and the force value mark lines are easily worn out, making it difficult to see. Most users prefer to permanently emboss the line marks on the steel pipe, which has high requirements for the clarity of the lines and words. In addition, the hardness of each batch of steel pipe materials is different, resulting in changes in the depth of the embossed words, affecting the quality of the product.

In the known rolling process, the pressing values for steel pipes of different diameters are usually set to standard values, and only the diameter of the steel pipe needs to be entered during the rolling process. Under normal circumstances, the hardness of the steel pipe is also known before rolling, and for steel pipes of different hardness, especially those with higher hardness in the same batch, deeper embossing is usually achieved by adjusting the height of the rolling die.

In the actual processing process, it is known that the minimum unit of adjusting the rolling die may be far greater than the actual adjustment height to be adjusted, while the hardness of the same batch of steel pipes will not have a large difference, so usually only a few millimeters of fine adjustment is required. This is difficult to achieve well in the existing rolling equipment and needs to be improved.

Summary of the invention

In order to fine-tune the pressing height of a steel tube lettering machine and ensure consistent quality of a batch of steel tubes after embossing, the present application provides a CNC steel tube lettering machine.

The present application provides a CNC steel tube letter rolling machine, which adopts the following technical solution:

A numerically controlled steel tube letter rolling machine comprises a machine platform, a letter rolling die and a lower die assembly mounted on the machine platform, wherein the machine platform is provided with a first driving assembly for driving the letter rolling die to slide downward, and the machine platform is also provided with a second driving assembly for driving the letter rolling die to slide horizontally;

The character rolling die comprises a character rolling guide plate and a die head mounted on the character rolling guide plate, a mounting groove is provided on the character rolling guide plate, the die head vertically slides in the mounting groove, a first spring is provided between the die head and the inner wall of the mounting groove, an adjustment rod is rotatably provided in the mounting groove, and an abutment block is fixedly provided on the adjustment rod;

The twisting assembly is arranged at one end of the adjusting rod extending out of the roller guide plate, so as to drive the adjusting rod to rotate; when adjusting, the adjusting rod is driven to rotate so that the abutting block abuts against the die head to make it move vertically downward.

By adopting the above technical solution, the steel pipe is placed on the lower die assembly. When the hardness of the steel pipe is known to be relatively high, fine-tuning is required to ensure clear engraving. At this time, the adjusting rod is rotated by twisting the assembly, so that the adjusting rod rotates and drives the abutment block to rotate. The abutment block abuts the die head to slide, and at the same time, the first spring is stretched, thereby achieving the effect of fine-tuning. In the actual processing process, after the control box on one side of the machine controls the rolling die to move down to the specified position, the second drive assembly drives the rolling die to slide in a direction perpendicular to the axial direction of the steel pipe, thereby achieving embossing.

Optionally, the first driving assembly includes a slide plate sliding on the machine platform, a bracket tube fixed on the upper end of the slide plate, a vertical planetary reducer fixed on the machine platform, a vertical lead screw coaxially fixed on the transmission shaft of the vertical planetary reducer, and a vertical servo motor fixed on the machine platform. The roller guide plate is installed on the slide plate, the vertical servo motor is transmission-connected to the vertical planetary reducer, and the vertical lead screw is threadedly connected to the bracket tube.

By adopting the above technical solution, when driving the rolling die to move vertically downward, the vertical servo motor is controlled to rotate, so that the vertical lead screw rotates synchronously under the transmission action of the vertical planetary reducer, thereby driving the bracket tube and the slide plate to move vertically downward.

Optionally, both sides of the machine are provided with embedding grooves, and a scale is embedded in the embedding grooves.

By adopting the above technical solution, the scale can enable the staff to clearly judge whether the downward height is correct, thereby further ensuring the rolling quality of the steel pipe.

Optionally, the second driving assembly includes a transverse servo motor fixed on the slide plate;

The transverse planetary reducer is fixed on the slide plate and is drivingly connected to the transverse servo motor;

The horizontal lead screw is rotatably connected to the slide plate and is connected to the horizontal planetary reducer through a coupling; the roller guide plate slides horizontally on the slide plate and is threadedly connected to the horizontal lead screw.

By adopting the above technical solution, the rotation of the shaft of the horizontal servo motor is controlled by the PLC control box, and the horizontal lead screw is rotated synchronously under the transmission action of the horizontal planetary reducer, thereby driving the roller guide plate to move along the axial direction of the horizontal lead screw.

Optionally, the abutment block is spirally shaped along the length direction of the adjusting rod, and the spirally shaped abutment block is wound on the side wall of the adjusting rod, and the width of the abutment block increases gradually along the spiral direction.

By adopting the above technical solution, the width is continuously increased, making the adjustment more precise.

Optionally, the twisting assembly includes a prism, and one end of the adjusting rod extending out of the roller guide plate is provided with a prism groove, and the prism slides in the prism groove;

A circular plate is fixed to the end of the prism, and a plurality of grooves are formed at one end of the circular plate away from the prism, a push rod is slidably arranged in the groove, and a second spring is also arranged in the groove to drive the push rod to extend out of the groove;

A third spring, wherein the third spring is sleeved outside the prism;

The clamping plate is fixed on the side wall of the roller guide plate. In the initial state, the clamping plate squeezes part of the ejector rod and restricts the rotation of the circular plate.

By adopting the above technical solution, in the initial state, the card plate squeezes part of the push rods to limit the rotation of the circular plate, thereby making it difficult for the adjusting rod to rotate; when it is necessary to adjust the downward displacement of the die head, a plurality of push rods are first squeezed by a wrench, and grooves with the same shape as the end of the wrench are formed between the push rods, making it difficult for the wrench and the circular plate to rotate relative to each other, and squeezing the card plate away from the circular plate, while turning the wrench, the wrench drives the circular plate and the adjusting rod to rotate, thereby achieving the adjustment effect.

Optionally, a pointer is fixed on the side wall of the circular plate, and an annular scale bar is fixed on the side wall of the roller guide plate, and the pointer is used in conjunction with the annular scale bar.

By adopting the above technical solution, the staff can accurately twist the circular plate to adjust the downward height of the die head.

Optionally, the lower mold assembly includes a carriage mounted on the machine platform;

There are two tugboats, and both tugboats are rotatably connected to the upper surface of the bracket to support the steel pipe, and the axial direction of the tugboat is perpendicular to the sliding direction of the roller guide plate;

The positioning plate is fixed to one side of the bracket, and the end of the steel pipe can abut against the side wall of the positioning plate;

Positioning cylinder, fixed on the machine platform;

The steel needle is vertically inserted on the machine platform and is fixedly connected to the piston rod of the positioning cylinder.

It is known that steel pipes are mainly used for processing wrenches. Therefore, during the cutting process, a through hole is usually opened at one end of the steel pipe. In the above technical solution, the steel pipe is placed between two tugboats, and the end of the steel pipe with the hole is abutted against the positioning plate. Here, the piston rod of the positioning cylinder is controlled to extend so that the steel needle is inserted into the hole, thereby realizing the positioning and placement of the steel pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

It can be used to engrave steel pipes with different hardness. During the processing, it is only necessary to fine-tune the downward movement of the die head to ensure the quality of engraving; it is easy to adjust.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of the overall structure of this embodiment.

FIG. 2 is a side view of the overall structure of this embodiment.

FIG. 3 is a schematic diagram of the overall structure of the type rolling mold in this embodiment.

FIG. 4 is a schematic diagram of the roller mold in this embodiment, which is mainly used to show the abutment block and the twisting assembly.

FIG. 5 is an exploded view of the twisting assembly in this embodiment.

1. Machine table; 2. Type rolling die; 3. Lower die assembly; 4. First drive assembly; 5. Second drive assembly; 6. Type rolling guide plate; 7. Die head; 8. Mounting groove; 9. First spring; 10. Adjusting rod; 11. Abutment block; 12. Twist assembly; 13. Slide plate; 14. Support tube; 15. Vertical planetary reducer; 16. Vertical lead screw; 17. Vertical servo motor; 18. Embedded groove; 19. Scale; 20. Horizontal servo motor; 21. Horizontal planetary reducer; 22. Horizontal lead screw; 23. Prism; 24. Prism groove; 25. Round plate; 26. Groove; 27. Push rod; 28. Second spring; 29. Third spring; 30. Card plate; 31. Pointer; 32. Annular scale bar; 33. Puller; 34. Positioning plate; 35. Positioning cylinder; 36. Steel needle.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-5.

The embodiment of the present application discloses a CNC steel tube letter rolling machine.

It is known that during the actual cutting process of the steel pipe material for producing wrenches, a through hole is opened at one end of the steel pipe; at the same time, a scale needs to be stamped on the outside of the steel pipe to indicate the size of the torque to be adapted.

1 and 2, a CNC steel pipe letter rolling machine includes a machine table 1, a lower die assembly 3 is arranged on the side wall of the machine table 1, and a letter rolling die 2 is arranged above the lower die assembly 3. A first driving assembly 4 for driving the letter rolling die 2 to slide down is arranged on the machine table 1. In the actual processing process, the letter rolling die 2 is driven downward by the first driving assembly 4, so that the steel pipe is located between the lower die assembly 3 and the letter rolling die 2. A second driving assembly 5 for driving the letter rolling die 2 to slide horizontally is also arranged on the machine table 1, and the letter rolling stamping can be realized by the second driving assembly 5.

1 , in order to achieve precise adjustment of the downward movement of the rolling die 2 by numerical control, the first driving assembly 4 includes a slide plate 13, which slides vertically on the machine table 1, and also includes a bracket tube 14, which is vertically arranged, and the lower end of the bracket tube 14 is fixedly mounted on the upper surface of the slide plate 13.

1 , the first driving assembly 4 further includes a vertical servo motor 17 , a vertical planetary reducer 15 and a vertical lead screw 16 . The vertical servo motor 17 is also fixedly mounted on the side wall of the platform 1 , and the vertical planetary reducer 15 is fixedly mounted on the side wall of the platform 1 .

Referring to Figure 1, the vertical servo motor 17 is electrically connected to the PLC controller on the outside of one side of the machine 1. The drive shaft of the vertical servo motor 17 is coaxially fixedly connected to the transmission shaft of the vertical planetary reducer 15. The vertical lead screw 16 is rotatably connected to the side wall of the machine 1. The vertical lead screw 16 is vertically arranged, and the upper end of the vertical lead screw 16 is coaxially fixedly connected to the power output shaft of the vertical planetary reducer 15. The vertical lead screw 16 is threadedly connected to the bracket tube 14. In the process of driving the rolling mold 2 to move vertically downward, the rotation of the rotating shaft of the vertical servo motor 17 is controlled by the PLC controller. After the vertical planetary reducer 15 is driven, the vertical lead screw 16 rotates synchronously, thereby driving the rolling mold 2 to slide vertically downward.

1 , in order to facilitate the staff to observe whether the height of the rolling die 2 is accurate, grooves 18 are provided on both side walls of the machine 1, and a scale 19 is embedded in the groove 18, on which is marked the height value for displaying the falling height of the rolling die 2 in real time.

3 and 4, the character rolling die 2 includes a character rolling guide plate 6 and a die head 7. The character rolling guide plate 6 is mounted on a slide plate 13. A mounting groove 8 is provided on the bottom surface of the character rolling guide plate 6. The die head 7 slides vertically in the inner cavity of the mounting groove 8. In order to achieve fine adjustment of the downward movement of the die head 7, an adjusting rod 10 is rotatably arranged in the mounting groove 8. An abutment block 11 is fixedly arranged on the adjusting rod 10. The abutment block 11 is used to abut the die head 7 to move it downward.

Referring to Figure 4, since the opening of the mounting groove 8 is set downward, in order to make it difficult for the abutment block 11 to move downward under the action of its own gravity, a first spring 9 is also arranged in the mounting groove 8. One end of the first spring 9 is fixedly installed in the inner cavity of the mounting groove 8, and the other end of the first spring 9 is fixed on the side wall of the die head 7.

4 , in order to make the fine adjustment range of the abutment block 11 large enough and not be limited by the minimum downward displacement during the adjustment process, the abutment block 11 is arranged in a spiral shape and is wound and fixed on the side wall of the adjustment rod 10 along the length direction of the adjustment rod 10 .

4 , the width of the abutment block 11 gradually increases along the spiral direction of the abutment block 11 , so that when the die head 7 is adjusted to move downward, the adjustment rod 10 is rotated and the adjusted rod 10 is fixed after rotation, and the spiral edge of the abutment block 11 abuts against the die head 7 to achieve fine adjustment of the downward movement of the die head 7.

Referring to Figures 4 and 5, in order to facilitate the twisting of the adjusting rod 10 and limit the rotation of the adjusting rod 10 after adjustment, a twisting assembly 12 is provided at the end of the adjusting rod 10 extending outside the rolling type mold 2. The twisting assembly 12 includes a prism 23, a circular plate 25, a third spring 29 and a clamping plate 30. A rib groove 24 is provided at the end of the adjusting rod 10 extending outside the rolling type guide plate 6, and the cross-sectional shape of the specific rib groove 24 can be a pentagonal shape. The prism 23 slides in the rib groove 24, and the circular plate 25 is fixedly mounted on the end of the prism 23 extending outside the rib groove 24. The third spring 29 is sleeved on the prism 23, one end of the third spring 29 is fixed to the side wall of the circular plate 25, and the other end of the third spring 29 is fixed to the end side wall of the adjusting rod 10.

5 , in order to achieve fixed limiting after the circular plate 25 is rotated, a plurality of grooves 26 are provided on the side of the circular plate 25 away from the prism 23 , the plurality of grooves 26 are evenly spaced, a push rod 27 is slidably provided in the groove 26 , and a second spring 28 is also provided in the groove 26 , one end of the second spring 28 is fixed to the inner cavity side wall of the groove 26 , and the other end of the second spring 28 is fixed to the end side wall of the push rod 27 .

4 and 5, the clamping plate 30 is fixed on the side wall of the character rolling guide plate 6. In the initial state, the plurality of ejector pins 27 are pressed into the inner cavity of the groove 26 by the clamping plate 30, so that a groove for clamping the shape of the end of the clamping plate 30 is formed between the plurality of ejector pins 27 under the action of the second spring 28. When the adjusting rod 10 needs to be turned, a wrench is used to contact the ejector pins 27, so that the shape of the end of the wrench is formed between the plurality of ejector pins 27, and the end of the wrench is clamped. When the wrench is turned, the circular plate 25 is usually pressed toward the direction of the character rolling guide plate 6, so that the circular plate 25 is separated from the clamping plate 30. At this time, the adjusting rod 10 is turned to rotate the abutment block 11.

4 and 5, in order to make the twisting adjustment more accurate, a pointer 31 is fixedly installed on the side wall of the circular plate 25. An annular scale bar 32 is provided on the side wall of the roller guide plate 6. The annular scale bar 32 is coaxially arranged with the adjustment rod 10. When the staff needs to move the adjustment die head 7 downward, the twisting can be adjusted by observing the scale indicated by the pointer 31.

Referring to Figures 2 and 3, after the steel pipe to be processed is placed between the lower die assembly 3 and the die head 7, it is necessary to drive the die head 7 to move perpendicular to the axial direction of the steel pipe, so as to achieve the effect of engraving. The second drive assembly 5 includes a transverse servo motor 20, a transverse planetary reducer 21 and a transverse lead screw 22. The transverse servo motor 20 is fixedly mounted on the end side wall of the slide 13, and the transverse planetary reducer 21 is also fixedly mounted on the side wall of the slide 13, and the transverse servo motor 20 and the transverse planetary reducer 21 are transmission-connected. The transverse lead screw 22 is rotationally connected to the side wall of the slide 13, and one end of the transverse lead screw 22 is fixedly connected to the output drive shaft of the transverse planetary reducer 21 through a coupling. The transverse lead screw 22 is threadedly connected to the roller guide plate 6.

2 and 3 , the transverse servo motor 20 is also electrically connected to the PLC device, driving the shaft of the transverse servo motor 20 to rotate. Under the transmission of the transverse planetary reducer 21, the transverse lead screw 22 rotates synchronously, thereby driving the roller guide plate 6 to move perpendicular to the axial direction of the steel pipe.

2 , in order to ensure that the engraving is clear and the position of the engraving is accurate, the lower mold assembly 3 includes a bracket and a tug 33, and the bracket is fixedly mounted on the machine 1. Two tugs 33 are provided, and both tugs 33 are rotatably connected to the bracket. In actual use, the steel pipe is set between the two tugs 33.

Referring to Figures 1 and 2, a positioning plate 34 is provided on one side of the bracket, and the positioning plate 34 is used as a backing during the processing, and a positioning cylinder 35 is provided on the machine table 1. Since a hole is provided at one end of the steel pipe, a steel needle 36 is fixed at the end of the piston rod of the positioning cylinder 35. In the actual processing, the end of the steel pipe with the hole is made to abut against the side wall of the positioning plate 34, and the piston rod of the positioning cylinder 35 is driven to extend through the PLC device, and the steel needle 36 is inserted into the hole to realize the positioning of the steel pipe, thereby facilitating the actual processing.

The implementation principle of a CNC steel tube letter rolling machine in the embodiment of the present application is as follows: during the processing, one end of the steel tube with a hole is pressed against the side wall of the positioning plate 34, so that the steel needle 36 is inserted into the hole, driving the shaft of the vertical servo motor 17 to rotate, so that the slide plate 13 slides vertically downward. When engraving a steel tube with a relatively high hardness, the circular plate 25 is pressed and clamped to rotate the circular plate 25, so that the adjustment rod 10 rotates synchronously, so that the abutment block 11 presses the die head 7 to move vertically downward. After the adjustment is completed, the circular plate 25 is released. Under the action of the second spring 28, the push rod 27 rebounds and is fixed to the clamping plate 30. At this time, the shaft of the horizontal servo motor 20 is controlled to rotate, so that the letter rolling slide plate 13 moves in a direction perpendicular to the steel tube, thereby achieving engraving.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (8)

A numerically controlled steel tube letter rolling machine comprises a machine platform (1), a letter rolling die (2) and a lower die assembly (3) mounted on the machine platform (1), characterized in that: the machine platform (1) is provided with a first driving assembly (4) for driving the letter rolling die (2) to slide downward, and the machine platform (1) is also provided with a second driving assembly (5) for driving the letter rolling die (2) to slide horizontally; The character rolling die (2) comprises a character rolling guide plate (6) and a die head (7) mounted on the character rolling guide plate (6); a mounting groove (8) is provided on the character rolling guide plate (6); the die head (7) vertically slides in the mounting groove (8); a first spring (9) is provided between the die head (7) and the inner wall of the mounting groove (8); an adjusting rod (10) is rotatably provided in the mounting groove (8); and an abutment block (11) is fixedly provided on the adjusting rod (10); The twisting assembly (12) is arranged at one end of the adjusting rod (10) extending outside the roller guide plate (6) and is used to drive the adjusting rod (10) to rotate; when adjusting, the adjusting rod (10) is driven to rotate so that the abutting block (11) abuts against the die head (7) to make it move vertically downward. The CNC steel tube letter rolling machine according to claim 1 is characterized in that: the first driving component (4) includes a slide plate (13) sliding on the machine table (1), a bracket tube (14) fixed to the upper end of the slide plate (13), a vertical planetary reducer (15) fixed to the machine table (1), a vertical lead screw (16) coaxially fixed to the transmission shaft of the vertical planetary reducer (15), and a vertical servo motor (17) fixed to the machine table (1), the letter rolling guide plate (6) is installed on the slide plate (13), the vertical servo motor (17) is transmission-connected to the vertical planetary reducer (15), and the vertical lead screw (16) is threadedly connected to the bracket tube (14). The CNC steel tube letter rolling machine according to claim 2 is characterized in that: both sides of the machine platform (1) are provided with embedding grooves (18), and a scale (19) is embedded in the embedding grooves (18). The CNC steel tube letter rolling machine according to claim 2 is characterized in that: the second driving assembly (5) comprises a transverse servo motor (20) fixed on the slide plate (13); A transverse planetary reducer (21) is fixed on the slide plate (13) and is drivingly connected to the transverse servo motor (20); The horizontal lead screw (22) is rotatably connected to the slide plate (13) and is connected to the horizontal planetary reducer (21) through a coupling; the roller guide plate (6) slides horizontally on the slide plate (13) and is threadedly connected to the horizontal lead screw (22). According to the CNC steel tube rolling machine according to claim 1, it is characterized in that the abutment block (11) is spirally shaped along the length direction of the adjusting rod (10), and the spiral abutment block (11) is wound on the side wall of the adjusting rod (10), and the width of the abutment block (11) increases along the spiral direction. The CNC steel tube letter rolling machine according to claim 5 is characterized in that: the twisting assembly (12) includes a prism (23), and one end of the adjustment rod (10) extending out of the letter rolling guide plate (6) is provided with a prism groove (24), and the prism (23) slides in the prism groove (24); A circular plate (25) is fixed to the end of the prism (23); a plurality of grooves (26) are formed at one end of the circular plate (25) away from the prism (23); a push rod (27) is slidably disposed in the groove (26); a second spring (28) is also disposed in the groove (26) for driving the push rod (27) to extend out of the groove (26); A third spring (29), wherein the third spring (29) is sleeved outside the prism (23); The clamping plate (30) is fixed on the side wall of the character rolling guide plate (6). In the initial state, the clamping plate (30) presses part of the push rod (27) and restricts the rotation of the circular plate (25). The CNC steel tube letter rolling machine according to claim 6 is characterized in that a pointer (31) is fixed on the side wall of the circular plate (25), an annular scale bar (32) is fixed on the side wall of the letter rolling guide plate (6), and the pointer (31) is used in conjunction with the annular scale bar (32). The CNC steel tube letter rolling machine according to claim 1 is characterized in that: the lower die assembly (3) comprises a carriage mounted on the machine platform (1); Two tug wheels (33) are provided, and both tug wheels (33) are rotatably connected to the upper surface of the bracket and used to support the steel pipe. The axial direction of the tug wheel (33) is perpendicular to the sliding direction of the roller guide plate (6); A positioning plate (34) is fixed to one side of the bracket, and the end of the steel pipe can abut against the side wall of the positioning plate (34); A positioning cylinder (35) is fixed on the machine platform (1); A steel needle (36) is vertically inserted into the machine platform (1), and the steel needle (36) is fixedly connected to the piston rod of the positioning cylinder (35).