Carving and milling machine suitable for tire mold pattern forming

Abstract

The invention relates to the technical field of intelligent manufacturing equipment industry, in particular to an engraving and milling machine suitable for tire mold pattern forming. Comprising a base, the base is rotationally connected with a driving gear, the base is provided with an engraving and milling device, the engraving and milling device is provided with two engraving and milling heads, the driving gear is fixedly connected with a connecting frame, the connecting frame is fixedly connected with two sets of fixing shells, and the fixing shells are slidably connected with first positioning blocks through sliding blocks; the connecting frame is rotationally connected with a second threaded rod, and the second threaded rod is in threaded connection with two sets of second positioning blocks. The tire mold divided into multiple sections is synchronously fixed through multiple groups of first positioning blocks and multiple groups of second positioning blocks, the engraving and milling precision of the multiple sections of molds is guaranteed, the tire mold is actively driven to rotate, on the premise that the freedom degree of the engraving and milling device is not increased, accurate engraving and milling of all positions on the inner arc surface of the tire mold are guaranteed, and the engraving and milling efficiency is improved. The engraving and milling cost of the tire mold is reduced, and the engraving and milling precision of the tire mold is improved.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing equipment technology, and in particular to a milling machine suitable for forming patterns on tire molds. Background Technology

[0002] Tire molds, especially those used in the production of large tires, are often designed in a segmented manner due to their large size. This involves dividing the tire mold into multiple arc-shaped modules. During mold manufacturing, the inner arc surface of each module requires high-precision milling to form the final tread pattern. However, milling segmented tire molds presents a series of technical challenges: First, in terms of clamping and positioning, multiple arc-shaped modules need to be clamped individually. This can lead to differences in the clamping degree of different molds due to debris and other impurities adhering to the clamping structure. This can cause misalignment of the milled tread pattern at the joints of multiple arc-shaped modules, resulting in a decrease in the accuracy of the final assembled mold cavity and affecting tire quality. Second, in terms of processing technology, the inner arc surface of the mold is a complex curved surface. To complete the tread pattern milling on it, one must either rely on expensive and complex multi-axis CNC milling machines or increase the number of segments in the tire mold and adjust the position of the tire mold during the milling process. This can lead to increased tire production costs or more gaps between segments, thus affecting the cost and accuracy of tire mold production. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the background art, the present invention provides a milling machine suitable for tire mold pattern forming.

[0004] The technical solution is as follows: A milling machine suitable for forming patterns on tire molds includes a base, a drive gear rotatably connected to the base, a milling machine mounted on the base, two symmetrically distributed milling heads on the milling machine, a connecting frame fixed to the drive gear, two sets of symmetrically distributed fixed shells fixed to the connecting frame, each set of fixed shells having two symmetrically distributed fixed shells, the milling head being located between the two fixed shells in the corresponding set, a first threaded rod rotatably connected to the fixed shell, a sliding block slidably connected to the first threaded rod within the fixed shell, a first positioning block slidably connected to the sliding block, a second threaded rod rotatably connected to the connecting frame, two sets of symmetrically distributed second positioning blocks slidably connected to the second threaded rod, each set of second positioning blocks having two symmetrically distributed second positioning blocks.

[0005] Preferably, the first threaded rods on the same group of fixed shells are driven by a transmission component, and the transmission component is driven by a gearbox to drive the second threaded rod.

[0006] Preferably, the first positioning block has a first inclined surface on the side near the corresponding second positioning block, and the opposite sides of the second positioning blocks in the same group have second inclined surfaces.

[0007] Preferably, the first threaded rod has one thread, the second threaded rod has four threads, and the second positioning block is located at the corresponding thread on the second threaded rod. All threads on the first threaded rod have the same direction of rotation, and adjacent threads on the second threaded rod have opposite directions of rotation.

[0008] Preferably, symmetrically distributed limiting blocks are fixed inside the fixed shell. The limiting blocks are used to compress the adjacent first positioning blocks to move. An elastic element is fixed between the first positioning block and the adjacent sliding block.

[0009] Preferably, the first positioning block is provided with a fixing part, which is in an inclined state.

[0010] Preferably, the base is slidably connected to two symmetrically distributed sliding frames, and each sliding frame is fixedly connected to a flexible strip.

[0011] Preferably, the base is rotatably connected to two symmetrically distributed third threaded rods, which are threadedly connected to the adjacent sliding frame.

[0012] Preferably, the sliding frame is rotatably connected to a fourth threaded rod, and the sliding frame is slidably connected to symmetrically distributed extrusion blocks. The extrusion blocks are threadedly connected to the adjacent fourth threaded rod, and the extrusion blocks are used to limit the flexible strip.

[0013] Preferably, the flexible strip is fixed with symmetrically distributed scrapers, which are located on both sides of the flexible strip.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses multiple sets of first positioning blocks and multiple sets of second positioning blocks to synchronously fix the tire mold divided into multiple segments, ensuring the accuracy of milling the multi-segment mold. Furthermore, by actively driving the tire mold to rotate, it ensures precise milling at all points on the inner arc surface of the tire mold without increasing the degree of freedom of the milling machine. This reduces the cost and improves the accuracy of tire mold milling. The first inclined surface and the inclined fixing part of the first positioning block fix the tire mold, thereby reducing the contact area when the tire mold is clamped and reducing the risk of misalignment of the tire mold due to debris at the clamping point. The probability of flatness is ensured, thus guaranteeing the accuracy of multi-segment tire mold docking and consequently the quality of the tire mold. The speed difference between the second and first threaded rods is adjusted by the gearbox, allowing the two second positioning blocks in the same group to clamp tire molds of different thicknesses. By rotating the third threaded rod, the height position of the sliding frame is adjusted, allowing the flexible strip to conform to the inner arc surface of different tire mold models. By rotating the fourth threaded rod, the position of the two extrusion blocks is adjusted, allowing the part of the flexible strip located between the extrusion blocks to be inserted into the inner arc surface of different tire mold models. A scraper is used to clean the sidewall of the inner arc surface of the tire mold, ensuring the efficiency of the tire mold after milling. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the drive gear of the present invention; Figure 3 This is a three-dimensional structural diagram of the sliding block of the present invention; Figure 4 This is a three-dimensional structural diagram of the fixing shell of the present invention; Figure 5 This is a three-dimensional structural cross-sectional view of the fixing shell of the present invention; Figure 6 This is a three-dimensional structural diagram of the sliding frame of the present invention; Figure 7 This is a three-dimensional structural diagram of the limiting block of the present invention; Figure 8 This is a three-dimensional structural diagram of the extrusion block of the present invention.

[0016] The markings in the attached diagram are as follows: 1-base, 2-drive gear, 3-milling tool, 4-milling head, 5-connecting frame, 6-fixed shell, 7-first threaded rod, 8-sliding block, 9-first positioning block, 10-second threaded rod, 11-second positioning block, 12-transmission component, 13-gearbox, 14-limiting block, 1401-elastic component, 15-fixed part, 16-sliding frame, 17-flexible strip, 18-third threaded rod, 19-fourth threaded rod, 20-extrusion block, 21-scraper. Detailed Implementation

[0017] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0018] Example 1 A milling machine suitable for forming tread patterns on tire molds, such as Figures 1-5 As shown, the system includes a base 1, on which a control terminal (not shown) is mounted. A drive gear 2 is rotatably connected to the base 1. The base 1 also has a power component (an existing structure not shown) for driving the drive gear 2. A milling machine 3 electrically connected to the control terminal is mounted on the base 1. The milling machine 3 has two milling heads 4 symmetrically distributed front to back. The milling machine 3 drives the two milling heads 4 to move and rotate. A connecting frame 5 is fixed to the drive gear 2. The connecting frame 5 is fixed to two sets of fixed shells 6 symmetrically distributed front to back. Each set of fixed shells 6 has two shells symmetrically distributed vertically. The milling heads 4 are located in the corresponding two shells of the same set. Between the fixed shells 6, a first threaded rod 7 is rotatably connected to the fixed shell 6. A sliding block 8, threadedly connected to the first threaded rod 7, is slidably connected inside the fixed shell 6. A first positioning block 9 is slidably connected to the sliding block 8. Two first positioning blocks 9 on the same group of fixed shells 6 form a group. A second threaded rod 10 is rotatably connected to the connecting frame 5. The second threaded rod 10 is threadedly connected to two groups of second positioning blocks 11 symmetrically distributed front and back. Each group of second positioning blocks 11 has two symmetrically distributed front and back. The first threaded rod 7 has one section of thread, and the second threaded rod 10 has four sections of thread. The second positioning block 11 is located on the corresponding section of the second threaded rod 10. At the threaded section, the threads on all first threaded rods 7 have the same direction of rotation, while the threads on adjacent sections of the second threaded rods 10 have opposite directions of rotation. Multiple sets of first positioning blocks 9 and multiple sets of second positioning blocks 11 synchronously fix the multi-segment tire mold, ensuring the precision of multi-segment mold milling. Furthermore, by actively driving the tire mold to rotate, precise milling of all points on the inner arc surface of the tire mold is ensured without increasing the degrees of freedom of the milling machine 3, thereby reducing the cost and improving the precision of tire mold milling. A first inclined surface is provided on the side of the first positioning block 9 closest to the corresponding second positioning block 11, and the opposite side of the same group of second positioning blocks 11... Each device is equipped with a second inclined surface. By adjusting the distance between the two first positioning blocks 9 in the same group, the first inclined surfaces of the two first positioning blocks 9 in the same group press against the upper and lower parts of different tire molds. By adjusting the distance between the two second positioning blocks 11 in the same group, the second inclined surfaces of the two second positioning blocks 11 in the same group press against the right part of different tire molds. Furthermore, it ensures that the central axis of the circle containing different tire molds can coincide with the rotation axis of the drive gear 2, thereby improving the applicability of this device. In the figure, the tire mold is divided into two sections as an example. In the figure, every two first positioning blocks 9 and two second positioning blocks 11 together clamp half of the tire mold.

[0019] like Figure 5As shown, the first threaded rods 7 on the same group of fixed shells 6 are driven by a transmission component 12, which can be a sprocket and chain, so that the two first threaded rods 7 on the same group of fixed shells 6 rotate synchronously. The two first threaded rods 7 in the same group have the same direction of rotation, so that the corresponding two sliding blocks 8 and two first positioning blocks 9 move synchronously. The transmission component 12 is driven by a gearbox 13, which is electrically connected to the control terminal. The connecting frame 5 is equipped with two motors for driving the corresponding gearbox 13 to rotate. The motors are not shown in the figure. By adjusting the transmission ratio of the gearbox 13, the speed difference between the second threaded rod 10 and the first threaded rod 7 is controlled, so that the two second positioning blocks 11 in the same group can clamp tire molds of different thicknesses, thereby improving the applicability of this device.

[0020] like Figure 5 and Figure 7 As shown, a limiting block 14 symmetrically distributed vertically is fixed inside the fixed shell 6. During the movement of the first positioning block 9 to the right, the limiting block 14 squeezes the adjacent first positioning block 9 to move, so that the two first positioning blocks 9 in the same group move in opposite directions to clamp the tire molds of different models. An elastic element 1401 is fixed between the first positioning block 9 and the adjacent sliding block 8. The elastic element 1401 is a compression spring. The first positioning block 9 is provided with a fixing part 15. The fixing part 15 is in an inclined state and is used to press the tire mold. After the first positioning block 9 and the fixing part 15 press the tire mold, the first inclined surfaces of the upper and lower first positioning blocks 9 respectively contact the upper and lower sides of the tire mold, and the fixing part 15 contacts the outer arc surface of the tire mold.

[0021] The specific working principle is as follows: When the operator needs to use this device to engrave and mill the tire mold, the operator places the segmented tire mold at the two sets of fixed shells 6 respectively, and then turns on the motor through the control terminal. The motor drives the second threaded rod 10 and the transmission component 12 through the gearbox 13. The second threaded rod 10 rotates and drives all the second positioning blocks 11 to move. The two second positioning blocks 11 in the same group move towards each other and clamp the right side of the tire mold.

[0022] During the rotation of the second threaded rod 10, the transmission component 12 drives the first threaded rod 7 to rotate, causing the sliding block 8 to move the first positioning block 9 to the right. The two first positioning blocks 9 in the same group press the upper and lower parts of the tire mold respectively. During the movement of the first positioning block 9 to the right, the limiting block 14 squeezes the adjacent first positioning block 9 to move, and the elastic component 1401 is compressed, so that the two first positioning blocks 9 in the same group move in opposite directions to clamp tire molds of different models. The fixing part 15 on the first positioning block 9 presses the tire mold (because the fixing part 15 is inclined, the fixing part 15 contacts the outer side line of the tire mold). The first inclined surface of the first positioning block 9 and the inclined fixing part 15 fix the tire mold to reduce the contact area when the tire mold is clamped, reduce the probability of the tire mold being uneven due to the presence of debris at the clamping point, thereby ensuring the accuracy when multiple tire molds are connected, and thus ensuring the quality of the tire mold. After the tire mold is clamped, the operator turns off the motor and turns on the power component through the control terminal.

[0023] When the power unit is activated, it drives the drive gear 2 to rotate. The drive gear 2 drives all the fixed shells 6 to rotate through the connecting frame 5. At the same time, the milling machine 3 is activated through the control terminal. The milling machine 3 drives the two milling heads 4 to move and rotate. The milling heads 4 mill the tire mold. The fixed shells 6 drive the tire mold to rotate through the sliding block 8 and the first positioning block 9. The connecting frame 5 drives the tire mold to rotate through the second threaded rod 10 and the second positioning block 11. Through multiple sets of first positioning blocks 9 and multiple sets of second positioning blocks 11, the tire mold divided into multiple segments is synchronously fixed to ensure the milling accuracy of the multi-segment mold. Furthermore, by actively driving the tire mold to rotate, the precise milling of each part of the inner arc surface of the tire mold is ensured without increasing the degree of freedom of the milling machine 3, thereby reducing the cost of tire mold milling and improving the accuracy of tire mold milling.

[0024] Before milling the tire mold, the operator activates the transmission 13 via the control terminal and adjusts the speed difference between the second threaded rod 10 and the first threaded rod 7 according to the thickness and size of the tire mold. This allows the two second positioning blocks 11 in the same group to clamp tire molds of different thicknesses, thus improving the applicability of the device.

[0025] After the tire mold is milled, the operator turns off the milling machine 3 through the control terminal. The power component drives the drive gear 2 to reverse and reset. Then, the operator turns off the power component and turns on the motor through the control terminal. The output shaft of the motor reverses and drives the second threaded rod 10 and the transmission component 12 to reverse through the gearbox 13. The second threaded rod 10 drives all the second positioning blocks 11 to reset. The transmission component 12 drives the corresponding sliding block 8 and the corresponding first positioning block 9 to reset through the two first threaded rods 7. The elastic element 1401 rebounds and drives the first positioning block 9 to reset. The operator removes the milled tire mold and cleans the device.

[0026] Example 2 Based on Example 1, such as Figures 4-6 and Figure 8 As shown, the base 1 is slidably connected to two symmetrically distributed sliding frames 16. Flexible strips 17 are fixedly connected to the sliding frames 16. The two sliding frames 16 are located below the rotation axis of the drive gear 2, and the milling head 4 is located to the lower right of the rotation axis of the drive gear 2, so that the milling head 4 first contacts the tire mold, and then the flexible strip 17 contacts the tire mold. The flexible strip 17 is used to wipe the inner arc surface of the tire mold. The base 1 is rotatably connected to two symmetrically distributed third threaded rods 18. The third threaded rods 18 are threadedly connected to adjacent sliding frames 16. By rotating the third threaded rods 18, the height position of the sliding frames 16 is adjusted, so that the flexible strips 17 fit the inner arc surface of different types of tire molds. The two third threaded rods 18 can be driven synchronously by belt drive to make the two sliding frames 16 and the two flexible strips 17 move synchronously, respectively synchronously fitting different sections of the inner arc surface of the tire mold. A fourth threaded rod 19 is rotatably connected to the sliding frame 16. Two symmetrically distributed extrusion blocks 20 are connected to the flexible strip 17. The extrusion blocks 20 are threadedly connected to the adjacent fourth threaded rod 19. The fourth threaded rod 19 has two threaded sections. The extrusion blocks 20 are located at the corresponding threaded section of the fourth threaded rod 19. The extrusion blocks 20 are used to limit the flexible strip 17. By rotating the fourth threaded rod 19, the two extrusion blocks 20 can move towards each other or away from each other. The position of the two extrusion blocks 20 can be adjusted so that the part of the flexible strip 17 located between the extrusion blocks 20 can be inserted into the inner arc surface of different types of tire molds. The remaining part of the flexible strip 17 is bent and deformed and fits to the front and rear sides of the inner arc surface of the tire mold. The flexible strip 17 is fixed with symmetrically distributed scrapers 21. The symmetrically distributed scrapers 21 are located on the front and rear sides of the flexible strip 17. When the flexible strip 17 is bent, the two scrapers 21 fit to the front and rear sides of the inner arc surface of the tire mold to clean the impurities milled off the tire mold and ensure the efficiency of the tire mold after milling.

[0027] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A milling machine suitable for forming patterns on tire molds, comprising a base (1), wherein a drive gear (2) is rotatably connected to the base (1), and a milling machine (3) is mounted on the base (1), wherein the milling machine (3) is provided with two symmetrically distributed milling heads (4), characterized in that, The drive gear (2) is fixedly connected to a connecting frame (5), and the connecting frame (5) is fixedly connected to two sets of symmetrically distributed fixed shells (6). Each set of fixed shells (6) has two symmetrically distributed fixed shells. The milling head (4) is located between the two fixed shells (6) in the same set. The fixed shell (6) is rotatably connected to a first threaded rod (7). The fixed shell (6) is slidably connected to a sliding block (8) that is threaded to the first threaded rod (7). The sliding block (8) is slidably connected to a first positioning block (9). The connecting frame (5) is rotatably connected to a second threaded rod (10). The second threaded rod (10) is threadedly connected to two sets of symmetrically distributed second positioning blocks (11). Each set of second positioning blocks (11) has two symmetrically distributed second positioning blocks (11).

2. The engraving and milling machine for tire mold tread pattern forming according to claim 1, characterized in that, The first threaded rods (7) on the fixed shell (6) of the same group are driven by a transmission member (12), and the transmission member (12) and the second threaded rod (10) are driven by a gearbox (13).

3. A milling machine for forming tire mold patterns according to claim 1, characterized in that, The first positioning block (9) has a first inclined surface on the side near the corresponding second positioning block (11), and the opposite side of the second positioning block (11) in the same group has a second inclined surface.

4. A milling machine suitable for forming tire mold patterns according to claim 1, characterized in that, The first threaded rod (7) has one thread, the second threaded rod (10) has four threads, and the second positioning block (11) is located at the corresponding thread on the second threaded rod (10). All the threads on the first threaded rod (7) have the same direction of rotation, and the adjacent threads on the second threaded rod (10) have opposite directions of rotation.

5. A milling machine suitable for forming tire mold patterns according to claim 1, characterized in that, The fixed shell (6) is fixedly connected with symmetrically distributed limiting blocks (14), which are used to squeeze the adjacent first positioning block (9) to move. The first positioning block (9) and the adjacent sliding block (8) are fixedly connected with an elastic element (1401).

6. A milling machine for forming tire mold patterns according to claim 5, characterized in that, The first positioning block (9) is provided with a fixing part (15), and the fixing part (15) is in an inclined state.

7. A milling machine for forming tire mold patterns according to claim 1, characterized in that, The base (1) is slidably connected to two symmetrically distributed sliding frames (16), and the sliding frames (16) are fixedly connected to flexible strips (17).

8. A milling machine for forming tire mold patterns according to claim 7, characterized in that, The base (1) is rotatably connected to two symmetrically distributed third threaded rods (18), and the third threaded rods (18) are threadedly connected to the adjacent sliding frame (16).

9. A milling machine for forming tire mold patterns according to claim 8, characterized in that, The sliding frame (16) is rotatably connected to a fourth threaded rod (19), and the sliding frame (16) is slidably connected to symmetrically distributed extrusion blocks (20). The extrusion blocks (20) are threadedly connected to the adjacent fourth threaded rod (19), and the extrusion blocks (20) are used to limit the flexible strip (17).

10. A milling machine for forming tire mold patterns according to claim 9, characterized in that, The flexible strip (17) is fixed with symmetrically distributed scrapers (21), which are located on both sides of the flexible strip (17).

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