A mold stroke rod with a quickly replaceable wear-resistant head

Abstract

The present invention relates to the technical field of mold stroke rods, and discloses a mold stroke rod with a quickly replaceable wear-resistant head, comprising a support seat, a guide pillar connected to an external drawing equipment body, the guide pillar comprising a wear-resistant head and a telescopic rod, the telescopic rod being provided with a coupling assembly for quickly installing and disassembling the wear-resistant head, the interior of the guide pillar being symmetrically provided with an embracing group, and an adjustment assembly being provided below the telescopic rod, wherein the coupling assembly comprises a mounting plate with a circular groove, the inner wall of the circular groove being downwardly provided with two locking grooves of different heights, and two mating parts being fixedly provided on the upper end surface of the mounting plate. The mold stroke rod with a quickly replaceable wear-resistant head can effectively solve the problem in the prior art that the guide pillar usually needs to be replaced as a whole, which not only significantly increases maintenance costs, but also because some guide pillars are bulky and complex in structure, replacement work is particularly tedious, which has an adverse effect on production efficiency and maintenance convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of mold stroke rods, and in particular to a mold stroke rod with a quickly replaceable wear-resistant head. Background Art

[0002] The drawing die is also called the drawing die or stretching die. Its core function is to accurately shape the metal sheet into a specific shape through plastic deformation. It is mainly composed of key components such as the punch, die, blank holder, fixed seat and ejector. During the working process, the downward pressure of the upper die and the close fit of the lower die achieve precise drawing of the sheet.

[0003] In this precise drawing process, the guide pillar with telescopic function plays a vital role. It not only provides stable shock-absorbing support between the upper and lower molds, ensuring the stable operation of the mold in a high-speed, high-pressure working environment, but also undertakes the task of precise guidance, ensuring accurate alignment between the molds, thereby ensuring the high quality and consistency of the drawn parts.

[0004] Although guide pillars play an indispensable role in drawing work, as working time accumulates, the contact surface between the guide pillars and the upper mold will inevitably wear out, which not only affects the accuracy of the guide, but may also damage the overall performance of the mold. At present, guide pillars usually need to be replaced as a whole, which not only significantly increases maintenance costs, but also because some guide pillars are large in size and complex in structure, the replacement work is particularly cumbersome, which has an adverse impact on production efficiency and maintenance convenience. Summary of the Invention

[0005] In response to the above-mentioned shortcomings of the prior art, the present invention provides a mold stroke rod with a quickly replaceable wear-resistant head, which can effectively solve the problem in the prior art that the guide pillars usually need to be replaced as a whole, which not only significantly increases the maintenance cost, but also because some guide pillars are large in size and complex in structure, the replacement work becomes particularly cumbersome, which has an adverse impact on production efficiency and maintenance convenience.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a mold stroke rod with a quickly replaceable wear-resistant head, comprising:

[0008] Support seat;

[0009] A guide pillar connected to the external drawing equipment body, the guide pillar including a wear-resistant head, which is arranged inside the guide pillar through a telescopic rod and installed coaxially with the guide pillar. The outer wall of the telescopic rod is symmetrically provided with two rectangular grooves distributed in the vertical direction according to the center of the circle. The telescopic rod is provided with a coupling assembly for quick installation and removal of the wear-resistant head. An embracing group is symmetrically provided inside the guide pillar and on the outer wall of the wear-resistant head. An adjustment assembly for adjusting the position of the embracing group is provided below the telescopic rod;

[0010] Among them, the top of the wear-resistant head is set in a conical shape, that is, the diameter of the top of the wear-resistant head gradually decreases from bottom to top, and the lower end surface of the wear-resistant head is fixedly provided with a mounting column with a mounting groove opened in the circumferential direction, and a locking block is fixedly provided on the side of the mounting column away from the wear-resistant head, and the outer wall of the mounting groove is provided with two strip grooves extending in the up and down directions and symmetrically according to the center of the mounting column;

[0011] Among them, the combining assembly includes a mounting plate fixedly arranged on the upper end surface of the telescopic rod and mated with the lower end surface of the mounting column. A circular groove is opened downward at the center position of the mounting plate, and two locking grooves of different heights are opened downward on the inner wall of the circular groove. Two mating parts are fixedly arranged on the upper end surface of the mounting plate. The two mating parts are located inside the mounting groove of the mounting column and are symmetrically installed according to the mating groove.

[0012] Furthermore, the mating part includes an inverted L-shaped supporting plate fixedly arranged on the upper end surface of the mounting plate, and an arc-shaped slider located inside the mounting groove is fixedly provided at one end of the inverted L-shaped supporting plate close to the circular groove through a connecting rod, and a clamping rod is provided for sliding inside the arc-shaped slider, one end of the clamping rod passes through the arc-shaped slider and intermittently cooperates with the outer wall of the mounting column, and the other end of the clamping rod slides through the connecting plate and the inverted L-shaped supporting plate and is attached to the inner wall of the guide pillar.

[0013] Furthermore, the guide pillar is a telescopic part and is fixedly arranged on the upper end surface of the support seat. The inner wall of the guide pillar is provided with two semicircular groove groups symmetrical about its center of circle, and the two engaging groups are respectively arranged inside the two semicircular groove groups. Each semicircular groove group includes three arc grooves distributed in the up and down directions. The inner wall of the guide pillar is also provided with a wedge-shaped groove corresponding to the position of the two clamping rods, and the inclined surface of the wedge-shaped groove gradually decreases from top to bottom.

[0014] Furthermore, the clutch group includes three arc-shaped plates slidingly arranged inside corresponding arc-shaped grooves, and one side wall of the three arc-shaped plates close to the wear-resistant head is rotatably provided with a number of axial rollers distributed in the up and down directions and in contact with the outer wall of the wear-resistant head. The number of axial rollers are slidably arranged on the outer wall of the arc-shaped plate by springs. The friction between the wear-resistant head and the guide pillar when the wear-resistant head is pressed downward by the set number of axial rollers is reduced, thereby extending the service life of the wear-resistant head. An M-shaped connecting frame is fixed to the other side of the three arc-shaped plates through a connecting rod. The M-shaped connecting frame connects the three arc-shaped plates into a whole and is provided with a chamfer on the lower end face of the M-shaped connecting frame. An adjustment part is also connected to the inside of the guide pillar and below the M-shaped connecting frame.

[0015] Furthermore, the adjustment part includes two strip plates corresponding to the positions of the M-shaped connecting frame and slidingly passing through the guide pillar. The two strip plates corresponding to the chamfered positions of the M-shaped connecting frame are also chamfered and several rollers are installed on the inclined surfaces of the chamfers of the strip plates for rotation. Rectangular through grooves are respectively provided on the sides where the two strip plates are close to each other. A wedge-shaped top block is installed inside the rectangular through groove, which is slidably arranged inside the guide pillar and the other end of which is located inside the rectangular groove of the telescopic rod. The upper end surface of the wedge-shaped top block is in contact with the upper inner wall of the rectangular through groove.

[0016] Furthermore, the adjustment component includes a circular plate located inside the guide pillar and fixedly connected to the lower end surface of the telescopic rod. The lower end surface of the circular plate is hingedly provided with two waist-shaped telescopic plates. The other end of the waist-shaped telescopic plate is hingedly provided with a sliding block that is slidably arranged inside the guide pillar through a tension spring. A drive group is also provided between the two waist-shaped telescopic plates and below the circular plate.

[0017] Furthermore, the drive group includes a double-sided rack fixedly arranged on the lower end surface of the circular plate, and the teeth on both sides of the double-sided rack are respectively engaged with an internally installed spiral spring and a gear connected to the guide pillar for rotation, and the two gears are respectively engaged with a matching rack sliding inside the guide pillar in the up and down directions on the side away from the double-sided rack.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention is provided with two arc-shaped sliding blocks that fit with the outer wall of the wear-resistant head. The close contact of the arc-shaped sliding blocks with the wear-resistant head ensures that the wear-resistant head will not deviate in the radial direction. While completing the radial limitation of the wear-resistant head, the locking block is rotated and pressed into the interior of the mounting plate and completes the limitation with the mounting plate, thereby ensuring that the locking block is located in the locking groove and will not deviate in the axial position. The limiting work of the wear-resistant head can be completed synchronously through the same installation step, which not only simplifies the installation efficiency of the wear-resistant head but also ensures the stability of the installation of the wear-resistant head. Finally, when replacing the wear-resistant head, it is only necessary to rotate the wear-resistant head in the opposite direction of the locking groove and then pull it upward. After pulling, continue to repeat the rotation action. Finally, after the connecting plate and the strip groove are aligned with each other, the wear-resistant head to be replaced can be taken out. The wear-resistant head is quickly installed and disassembled so that it can be quickly disassembled and replaced when it is severely worn. There is no need to replace the stroke rod as a whole, which reduces maintenance costs and improves the efficiency and economy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0021] Figure 1 Schematic diagram of the three-dimensional structure in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the guide pillar in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the internal mechanism of the guide pillar in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the wear-resistant head in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a three-dimensional structure of combined components in an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the positional relationship between the wear-resistant head and the combined assembly in an embodiment of the present invention;

[0027] Figure 7 This is a schematic structural diagram of the three-dimensional separation of the embracing group in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the adjustment component in an embodiment of the present invention;

[0029] Figure 9 This is an embodiment of the present invention Figure 8 A schematic diagram of the partially enlarged structure at center A;

[0030] Figure 10 This is an embodiment of the present invention Figure 8 A schematic diagram of the structure with a partial enlargement at point B in the middle;

[0031] Figure 11 This is a schematic diagram of the structure of the three-dimensional separation of the coordinated rack and the strip plate in an embodiment of the present invention;

[0032] Figure 12 It is a schematic diagram of the three-dimensional state transformation of the wear-resistant head, the clutch group and the adjustment component in the embodiment of the present invention.

[0033] The numbers in the figure represent: 0, drawing equipment body; 1, support seat; 2, guide pillar; 21, wear-resistant head; 211, mounting column; 212, locking block; 22, telescopic rod; 23, coupling assembly; 231, mounting plate; 232, locking groove; 233, matching piece; 2331, inverted L-shaped supporting plate; 2332, arc-shaped slider; 2333, tightening rod; 24, holding group; 241, arc-shaped plate; 242, M-shaped connecting frame; 243, adjusting piece; 2431, strip plate; 2432, wedge-shaped top block; 25, adjusting assembly; 251, waist-shaped telescopic plate; 252, sliding block; 253, driving group; 2531, double-sided rack; 2532, gear; 2533, matching rack; 26, arc-shaped groove; 27, wedge-shaped groove. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] The present invention will be further described below with reference to the embodiments.

[0036] Example:

[0037] See also Figures 1-12 The present invention provides a technical solution: a mold stroke rod with a quickly replaceable wear-resistant head, comprising:

[0038] Support seat 1;

[0039] A guide pillar 2 connected to the external drawing equipment body 0 includes a wear-resistant head 21, which is arranged inside the guide pillar 2 and coaxially mounted on the guide pillar 2 via a telescopic rod 22. The outer wall of the telescopic rod 22 has two rectangular grooves distributed in the vertical direction symmetrically about the center of the circle. The telescopic rod 22 is provided with a coupling assembly 23 for quickly installing and removing the wear-resistant head 21. An embracing group 24 is symmetrically provided inside the guide pillar 2 and on the outer wall of the wear-resistant head 21. An adjustment assembly 25 for adjusting the position of the embracing group 24 is provided below the telescopic rod 22;

[0040] Among them, the top of the wear-resistant head 21 is set in a conical shape, that is, the diameter of the top of the wear-resistant head 21 gradually decreases from bottom to top, and the lower end surface of the wear-resistant head 21 is fixedly provided with a mounting column 211 with a mounting groove opened in the circumferential direction, and a locking block 212 is fixedly provided on the side of the mounting column 211 away from the wear-resistant head 21. The outer wall of the mounting groove is provided with two strip grooves extending in the up and down direction and symmetrically about the center of the mounting column 211;

[0041] Among them, the combining assembly 23 includes a mounting plate 231 fixedly arranged on the upper end surface of the telescopic rod 22 and mating with the lower end surface of the mounting column 211. A circular groove is opened downward at the center position of the mounting plate 231, and two locking grooves 232 of different heights are opened downward on the inner wall of the circular groove. Two mating parts 233 are fixedly arranged on the upper end surface of the mounting plate 231. The two mating parts 233 are located inside the mounting groove of the mounting column 211 and are symmetrically installed according to the mating groove.

[0042] The mating part 233 includes an inverted L-shaped supporting plate 2331 fixedly set on the upper end surface of the mounting plate 231. The end of the inverted L-shaped supporting plate 2331 close to the circular groove is fixedly provided with an arc-shaped slider 2332 located inside the mounting groove through a connecting rod. The inner sliding part of the arc-shaped slider 2332 is provided with a tightening rod 2333. One end of the tightening rod 2333 passes through the arc-shaped slider 2332 and intermittently cooperates with the outer wall of the mounting column 211. The other end of the tightening rod 2333 slides through the connecting plate and the inverted L-shaped supporting plate 2331 and is attached to the inner wall of the guide pillar 2.

[0043] The guide pillar 2 is a telescopic part and is fixedly arranged on the upper end surface of the support seat 1. The inner wall of the guide pillar 2 is provided with two semicircular groove groups symmetrical about its center. The two engaging groups 24 are respectively arranged inside the two semicircular groove groups. Each semicircular groove group includes three arc grooves 26 distributed in the up and down directions. The inner wall of the guide pillar 2 is also provided with a wedge-shaped groove 27 corresponding to the position of the two tightening rods 2333. The inclined surface of the wedge-shaped groove 27 gradually decreases from top to bottom.

[0044] The holding group 24 includes three arc plates 241 slidingly arranged inside the corresponding arc grooves 26. The side walls of the three arc plates 241 close to the wear-resistant head 21 are all rotatably provided with a number of axial rollers distributed in the up and down directions and in contact with the outer wall of the wear-resistant head 21. The number of axial rollers are slidably arranged on the outer wall of the arc plate 241 through springs. The friction between the wear-resistant head 21 and the guide pillar 2 when the wear-resistant head 21 is pressed downward by the set number of axial rollers is reduced, thereby extending the service life of the wear-resistant head 21. The other side of the three arc plates 241 is fixed with an M-shaped connecting frame 242 through a connecting rod. The M-shaped connecting frame 242 connects the three arc plates 241 into a whole and is chamfered on the lower end face of the M-shaped connecting frame 242. An adjustment part 243 is also connected to the inside of the guide pillar 2 and below the M-shaped connecting frame 242.

[0045] The adjusting part 243 includes two strip plates 2431 corresponding to the positions of the M-shaped connecting frame 242 and slidingly passing through the guide pillar 2. The two strip plates 2431 are also chamfered at the positions corresponding to the chamfers of the M-shaped connecting frame 242, and a number of rollers are installed on the inclined surfaces of the chamfers of the strip plates 2431 for rotation. The two strip plates 2431 are respectively provided with rectangular through grooves on the sides where they are close to each other. The interior of the rectangular through groove is cooperated with the installation of a wedge-shaped top block 2432 which is slidably set inside the guide pillar 2 and the other end of which is located inside the rectangular groove of the telescopic rod 22. The upper end surface of the wedge-shaped top block 2432 is in contact with the upper inner wall of the rectangular through groove.

[0046] The adjustment component 25 includes a circular plate located inside the guide pillar 2 and fixedly connected to the lower end surface of the telescopic rod 22. The lower end surface of the circular plate is hingedly provided with two waist-shaped telescopic plates 251. The other end of the waist-shaped telescopic plate 251 is hingedly provided with a sliding block 252 that is slidably arranged inside the guide pillar 2 through a tension spring. A driving group 253 is also provided between the two waist-shaped telescopic plates 251 and below the circular plate.

[0047] The driving group 253 includes a double-sided rack 2531 fixedly arranged on the lower end surface of the circular plate. The teeth on both sides of the double-sided rack 2531 are respectively engaged with an internally installed spiral spring and a gear 2532 that is rotatably connected to the guide pillar 2. The two gears 2532 are respectively engaged with a matching rack 2533 that slides in the up and down directions inside the guide pillar 2 on the side away from the double-sided rack 2531.

[0048] During specific work, the wear-resistant head 21 is quickly installed:

[0049] The locking block 212 is then rotated into the lower locking groove 232 and locked into the lower locking groove 232. Finally, the locking block 212 is locked with the lower locking groove 232.

[0050] When the mounting post 211 is moved downward and enters the circular groove, the connecting rod and the arc-shaped slider 2332 gradually slide into the mounting groove along the bar groove (in the initial state, the position of the bar groove on the mounting post 211, the position of the rectangular slide groove opened on the locking groove 232 and the position of the connecting rod are in the same vertical direction). During the downward movement of the mounting post 211, the initial positioning of the mounting post 211 and the mounting plate 231 is completed. At the same time, the height of the bar groove is relatively high. When the connecting rod enters the bar groove, there is still a certain distance between the upper end surface of the connecting rod and the top of the bar groove. The purpose is to provide space for the mounting post 211 to press down later. Subsequently, during the rotation of the mounting post 211, the arc-shaped slider 2332 intersects with the position of the bar groove and enters the mounting groove. Due to the lack of an opening at the bottom, the arc-shaped slider 2332 and the connecting rod cannot be separated from the mounting post 211. Immediately afterwards, when the mounting post 211 is pressed downward, the downward pressing space reserved in the bar groove ensures that the connecting rod is not blocked.

[0051] It should be noted that the wear-resistant head 21 and the mounting column 211 are fitted with the outer wall of the wear-resistant head 21 through the arc outer walls of the two arc-shaped sliders 2332 during the installation process. Since the center of the two arc-shaped sliders 2332 coincides with the center of the mounting plate 231, the relative position of the wear-resistant head 21 and the mounting plate 231 can be guaranteed after the two arc-shaped sliders 2332 enter the mounting groove, ensuring that they will not deviate in the radial direction. While completing the radial limitation of the wear-resistant head 21, the locking block 212 is rotated and pressed into the interior of the mounting plate 231 and completes the limitation with the mounting plate 231, thereby ensuring The locking block 212 is located inside the locking groove 232 and will not experience axial position deviation. The limiting work of the wear-resistant head 21 can be completed simultaneously through the same installation step, which not only simplifies the installation efficiency of the wear-resistant head 21 but also ensures the stability of the installation of the wear-resistant head 21. Finally, when the wear-resistant head 21 is connected to the mounting plate 231 into a whole and enters the guide pillar 2, the several arc plates 241 set on the inner wall of the guide pillar 2 and the shaft rollers set on the arc plates 241 will also adaptively complete the engagement and limiting work of the outer wall of the wear-resistant head 21, thereby further improving the stability of the wear-resistant head 21 during later use.

[0052] The change process of the guide pillar 2 in conjunction with the upper mold during the downward pressing operation:

[0053] After the wear-resistant head 21 is quickly installed, the upper mold of the drawing equipment is controlled to move downward. Since the upper end surface of the guide pillar 2 is higher than the upper surface of the lower mold, the upper mold will preferentially contact the wear-resistant head 21 during its downward movement (in the initial state, when the wear-resistant head 21 is quickly installed, its conical top end is higher than the top end of the guide pillar 2 and preferentially contacts the upper mold. When the upper mold moves downward and contacts the wear-resistant head 21, if there is a slight deviation or angle error between the upper mold and the wear-resistant head 21, the conical wear-resistant head 21 will play a certain compensation role, and due to the geometric characteristics of the cone, the wear-resistant head 21 will guide the upper mold and the lower mold to gradually align, and adjust the relative position between the upper mold and the lower mold in advance before the upper and lower molds contact, so as to avoid the upper mold from moving too far downward). The problem of difficulty in adjustment and damage to the plate is caused by the long length. As the upper mold is gradually pressed down, the contact area between the conical wear-resistant head 21 and the upper mold gradually increases. The increased contact area can gradually disperse and transmit pressure, avoiding sudden pressure concentration causing impact and vibration of the mold, and then protecting the mold from damage. At the same time, when the wear-resistant head 21 is pressed down and gradually moves, the several shaft rollers set on the internal arc plate 241 of the guide pillar 2 rotate after contacting the outer wall of the wear-resistant head 21, and the smoothness of the wear-resistant head 21 in the downward movement process is improved during the rotation process. The several shaft rollers are set to prevent the wear-resistant head 21 from directly contacting the inner wall of the guide pillar 2, and the friction between the wear-resistant head 21 and the guide pillar 2 during the sliding process is reduced, thereby extending the service life of the wear-resistant head 21.

[0054] When the wear-resistant head 21 is pressed downward into the interior of the guide pillar 2 by the upper mold, the upper mold and the guide pillar 2 are tightly attached to each other, the telescopic rod 22 completes the compression and connects the upper and lower rectangular grooves. At this time, the clamping rods 2333 inside the two arc-shaped sliders 2332 are synchronously approached under the push of the inclined surface of the wedge-shaped groove 27, and the ends of the two clamping rods 2333 are close to the outer wall of the wear-resistant head 21. The two clamping rods 2333 cooperate with the wedge-shaped groove 27 to gradually complete the clamping work with the wear-resistant head 21, thereby avoiding vibration of the wear-resistant head 21 during the downward compression process by the upper mold.

[0055] As the upper mold continues to move downward, the guide pillar 2 is gradually compressed downward. During the compression process, the two waist-shaped telescopic plates 251 hinged on the circular plate preferentially change the tilt direction, and the sliding block 252 and the tension spring disperse the downward pressure on the guide pillar 2. The waist-shaped telescopic plate 251 set below the circular plate and the sliding block 252 connected to the tension spring can further complete the shock absorption work of the guide pillar 2, and reduce the vibration between the guide pillar 2 and the lower mold through the transmission of pressure. The use of multi-stage shock absorption can effectively avoid damage to the guide pillar 2 caused by sudden pressure concentration during operation.

[0056] When the guide pillar 2 is under pressure, it drives the double-sided rack 2531 set on the circular plate to move downward. When the double-sided rack 2531 is moving, it drives the corresponding gear 2532 to rotate through the meshing of the racks on both sides. When the two gears 2532 rotate, the spiral spring set inside them will be compressed first, and the mating rack 2533 that is meshed with the side away from the two gears 2532 will move upward synchronously under the rotation of the corresponding gear 2532. In the process of the two mating racks 2533 moving upward, their upper end surfaces gradually align with the lower end surfaces of the corresponding strip plates 2431. After the end faces are in contact, they push the strip plate 2431 upward. During the upward movement of the two strip plates 2431, the rectangular through grooves on their end faces gradually push the corresponding wedge-shaped top blocks 2432. The two wedge-shaped top blocks 2432 enter the rectangular grooves on the telescopic rod 22 during the synchronous approach process, thereby completing the locking of the telescopic rod 22. The synchronous approach of the two wedge-shaped top blocks 2432 ensures that the telescopic rod 22 will not rebound during the downward pressing work of the upper mold. This protection method can prevent the sudden rebound of the telescopic rod 22 during the operation of the drawing equipment, causing vibration of the guide pillar 2.

[0057] As the guide pillar 2 is continuously pressed downward, the strip plates 2431 on both sides move upward and push the corresponding M-shaped connecting frames 242 upward. The two M-shaped connecting frames 242 are pushed synchronously and approach each other. Several shaft rollers set on the arc plate 241 are squeezed by the outer wall of the wear-resistant head 21 and enter the interior of the arc plate 241. By switching the shaft rollers and the arc plate 241, the radial direction of the wear-resistant head 21 is further limited, ensuring that when the lower mold is under pressure, the wear-resistant head 21 is clamped and limited and will not be displaced in the radial direction, so that it is always concentric and coaxial with the guide pillar 2.

[0058] Changes of guide pillar 2 during upper mold resetting:

[0059] When the upper mold completes the drawing of the plate and resets upward, due to the disappearance of the upper pressure, the circular plate drives the bilateral racks 2531 to move upward first. At this time, the scroll springs inside the gears 2532 on both sides drive their respective gears 2532 to rotate during the reset process, and cooperate with the racks 2533 and the strip plates 2431 to move downward. Due to the disappearance of the thrust of the outer walls of the two M-shaped connecting frames 242, the arc plates 241 on both sides move away from each other and make the shaft roller fit with the outer wall of the wear-resistant head 21 again. At this time, the wedge-shaped top blocks 2432 on both sides are still located inside the telescopic rod 22, so the wear-resistant head 21 is still in the state of being clamped. Locked state, and as the upper mold is reset, the pressure on the guide pillar 2 disappears, and the bilateral racks 2531 inside it move to the initial position, and the rectangular grooves opened on the strip plates 2431 on both sides move to the same horizontal height as the wedge-shaped top block 2432. At this time, the wedge-shaped top block 2432 is quickly reset and enters the rectangular groove, and then the telescopic rod 22 drives the wear-resistant head 21 to reset. After the drawing work is completed, the wear-resistant head 21 and the guide pillar 2 are reset in sequence, which avoids the wear-resistant head 21 being suddenly bounced up by the reset force of the telescopic rod 22 and directly contacting the lower surface of the upper mold, thereby damaging the mold and the wear-resistant head 21.

[0060] Quick disassembly of the wear-resistant head 21:

[0061] As the wear-resistant head 21 is used for a long time, it will be worn out and affect the alignment accuracy between the upper and lower molds. At this time, when replacing the wear-resistant head 21, you only need to rotate the wear-resistant head 21 in the opposite direction along the locking groove 232 and pull it upward. After pulling, continue to repeat the rotation action. Finally, after the connecting plate and the strip groove are aligned with each other, the wear-resistant head 21 to be replaced can be taken out.

[0062] It is worth emphasizing that the mold stroke rod with a quickly replaceable wear-resistant head has the following advantages:

[0063] Advantage 1: During the installation process, the wear-resistant head 21 and the mounting column 211 are fitted with the outer wall of the wear-resistant head 21 through the arc outer walls of the two arc-shaped sliders 2332, ensuring that they will not deviate in the radial direction. While completing the radial limitation of the wear-resistant head 21, the locking block 212 is rotated and pressed into the interior of the mounting plate 231 and completes the limitation with the mounting plate 231, thereby ensuring that the locking block 212 is located in the locking groove 232 and will not deviate in the axial position. The limiting work of the wear-resistant head 21 can be completed synchronously through the same installation step. It not only simplifies the installation efficiency of the wear-resistant head 21 but also ensures the stability of the installation of the wear-resistant head 21. Finally, when replacing the wear-resistant head 21, it is only necessary to rotate the wear-resistant head 21 in the opposite direction along the locking groove 232 and then pull it upward. After pulling, continue to repeat the rotation action. Finally, after the connecting plate and the strip groove are aligned with each other, the wear-resistant head 21 to be replaced can be taken out. The wear-resistant head 21 is quickly installed and disassembled so that it can be quickly disassembled and replaced when it is severely worn. There is no need to replace the stroke rod as a whole, which reduces maintenance costs and improves the efficiency and economy of equipment use.

[0064] Advantage 2: When the upper mold moves downward and contacts the wear-resistant head 21, the conical wear-resistant head 21 will play a certain compensatory role, and due to the geometric characteristics of the cone, the wear-resistant head 21 will guide the upper mold and the lower mold to gradually align, and the pressure can be gradually dispersed and transmitted by the increased contact area, avoiding sudden pressure concentration causing impact and vibration of the mold, and then protecting the mold from damage.

[0065] Advantage three: When the wear-resistant head 21 is pressed downward and gradually moves, the several axial rollers set on the internal arc plate 241 of the guide pillar 2 contact the outer wall of the wear-resistant head 21 and rotate, thereby improving the smoothness of the wear-resistant head 21 in the downward movement process. The several axial rollers set up prevent the wear-resistant head 21 from directly contacting the inner wall of the guide pillar 2, reducing the friction between the wear-resistant head 21 and the guide pillar 2 during the sliding process, thereby extending the service life of the wear-resistant head 21.

[0066] Advantage 4: The guide pillar 2 is continuously pressed down, and the strip plates 2431 on both sides move upward and push the corresponding M-shaped connecting frames 242 upward. The two M-shaped connecting frames 242 are pushed synchronously and approach each other. Several shaft rollers arranged on the arc plate 241 are squeezed by the outer wall of the wear-resistant head 21 and enter the interior of the arc plate 241. By switching the shaft rollers and the arc plate 241, the purpose is to further limit the radial direction of the wear-resistant head 21 through the engagement of the arc plate 241, so as to ensure that when the lower mold is under pressure, the wear-resistant head 21 will not be displaced in the radial direction due to the engagement and limitation, so that it is always concentric and coaxial with the guide pillar 2.

[0067] Advantage 5: During the downward pressing process of the upper mold, the two wedge-shaped top blocks 2432 enter the rectangular groove opened on the telescopic rod 22 during the synchronous approach process, completing the locking work of the telescopic rod 22. As the upper mold is reset, the pressure on the guide pillar 2 disappears, and the bilateral rack 2531 inside it moves to the initial position, and the rectangular through grooves opened on the strip plates 2431 on both sides move to the same horizontal height as the wedge-shaped top blocks 2432. At this time, the wedge-shaped top blocks 2432 are quickly reset and enter the rectangular through grooves, and then the telescopic rod 22 drives the wear-resistant head 21 to reset. After the drawing work is completed, the wear-resistant head 21 and the guide pillar 2 are reset in sequence, which avoids the wear-resistant head 21 being suddenly bounced up by the reset force of the telescopic rod 22 and directly contacting the lower surface of the upper mold, thereby damaging the mold and the wear-resistant head 21.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A mold stroke rod with a quickly replaceable wear-resistant head, characterized in that: include: Support seat; A guide pillar connected to the external drawing equipment body, the guide pillar including a wear-resistant head, the wear-resistant head being arranged inside the guide pillar through a telescopic rod and being coaxially mounted therewith, the outer wall of the telescopic rod being symmetrically provided with two rectangular grooves, the telescopic rod being provided with a coupling assembly for quick installation and removal of the wear-resistant head, an embracing group being symmetrically provided inside the guide pillar and on the outer wall of the wear-resistant head, and an adjustment assembly for adjusting the position of the embracing group being provided below the telescopic rod; The top of the wear-resistant head is tapered, and a mounting column with a mounting groove provided along the circumferential direction is fixedly provided on the lower end surface of the wear-resistant head. A locking block is fixedly provided on the side of the mounting column away from the wear-resistant head, and two strip grooves are provided on the outer wall of the mounting groove. The combination assembly includes a mounting plate fixedly mounted on the upper end surface of the telescopic rod and abutting against the lower end surface of the mounting column. A circular groove is provided downwardly at the center of the mounting plate, and two locking grooves of different heights are provided downwardly on the inner wall of the circular groove. Two mating pieces are fixedly mounted on the upper end surface of the mounting plate. The two mating pieces are located inside the mounting groove of the mounting column and are symmetrically installed according to the mating grooves. The guide pillar is a telescopic member and is fixedly mounted on the upper end surface of the support base. The inner wall of the guide pillar is provided with two semicircular groove groups symmetrically about its center. The two engaging groups are respectively arranged inside the two semicircular groove groups. Each semicircular groove group includes three arc-shaped grooves distributed in the vertical direction. The embracing group includes three arc-shaped plates slidably arranged inside corresponding arc-shaped grooves, and one side wall of the three arc-shaped plates close to the wear-resistant head is rotatably provided with a plurality of shaft rollers distributed in the up and down directions and in contact with the outer wall of the wear-resistant head. The plurality of shaft rollers are slidably arranged on the outer wall of the arc-shaped plate by springs. The friction between the wear-resistant head and the guide pillar when the wear-resistant head is pressed downward by the plurality of shaft rollers is reduced, thereby extending the service life of the wear-resistant head. An M-shaped connecting frame is fixedly provided on the other side of the three arc-shaped plates through a connecting rod. The M-shaped connecting frame connects the three arc-shaped plates into a whole and is provided with a chamfer on the lower end surface of the M-shaped connecting frame. An adjusting piece is also connected to the inside of the guide pillar and below the M-shaped connecting frame. The adjusting part includes two strip plates corresponding to the positions of the M-shaped connecting frame and slidingly passing through the guide pillars. The two strip plates corresponding to the chamfered positions of the M-shaped connecting frame are also chamfered and a number of rollers are rotatably installed on the inclined surfaces of the chamfers of the strip plates. A rectangular through groove is respectively provided on the side where the two strip plates are close to each other. A wedge-shaped top block is slidably arranged inside the guide pillar and the other end is located inside the rectangular groove of the telescopic rod. The upper end surface of the wedge-shaped top block is in contact with the upper inner wall of the rectangular through groove.

2. A mold travel rod with a quickly replaceable wear-resistant head according to claim 1, characterized in that: The mating part includes an inverted L-shaped supporting plate fixedly arranged on the upper end surface of the mounting plate, and an arc-shaped slider located inside the mounting groove is fixedly arranged on one end of the inverted L-shaped supporting plate close to the circular groove through a connecting rod, and a clamping rod is slidingly arranged inside the arc-shaped slider, one end of the clamping rod passes through the arc-shaped slider and intermittently cooperates with the outer wall of the mounting column, and the other end of the clamping rod slides through the connecting plate and the inverted L-shaped supporting plate and abuts against the inner wall of the guide pillar.

3. The mold travel rod with a quickly replaceable wear-resistant head according to claim 1, characterized in that: The inner wall of the guide pillar is further provided with a wedge-shaped groove corresponding to the positions of the two abutting rods, and the inclined surface of the wedge-shaped groove gradually decreases from top to bottom.

4. The mold travel rod with a quickly replaceable wear-resistant head according to claim 1, characterized in that: The adjustment component includes a circular plate located inside the guide pillar and fixedly connected to the lower end surface of the telescopic rod. The lower end surface of the circular plate is hingedly provided with two waist-shaped telescopic plates. The other end of the waist-shaped telescopic plate is hingedly provided with a sliding block that is slidably arranged inside the guide pillar through a tension spring. A driving group is also provided between the two waist-shaped telescopic plates and below the circular plate.

5. The mold travel rod with a quickly replaceable wear-resistant head according to claim 4, characterized in that: The driving group includes a double-sided rack fixedly arranged on the lower end surface of the circular plate, and the teeth on both sides of the double-sided rack are respectively engaged with an internally installed spiral spring and a gear rotatably connected to the guide pillar. The two gears are respectively engaged with a matching rack sliding inside the guide pillar in the up and down directions on one side away from the double-sided rack.

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