Squeezing pin structure with guide device

Abstract

The utility model relates to the technical field of extrusion pins, in particular to an extrusion pin structure with a guide device, which comprises a driving device. The connecting part is connected with the output end of the driving device, and the driving device is used for driving the connecting part to move up and down; the guiding device is used for guiding the up-down movement of the connecting part, and the connecting part is connected with the guiding device; the extrusion pin is connected with the guide device, so that the driving device synchronously drives the connecting part and the extrusion pin to move up and down; and the extrusion pin sleeve is arranged below the guide device, and the lower end of the extrusion pin is movably arranged in the extrusion pin sleeve. The guide device is additionally arranged to guide the movement process of the extrusion pin, so that a gap always exists between the extrusion pin and the extrusion pin sleeve, jamming is avoided, the failure rate of the extrusion pin structure is reduced, the production efficiency is improved, and the loss cost of the extrusion pin and the extrusion pin sleeve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion pins, in particular to an extrusion pin structure with a guiding device. Background Technique

[0002] Shrinkage cavity is one of the main reasons for internal quality defects and product scrapping of aluminum alloy die-castings. The main reason for its formation is the shrinkage characteristics during the solidification process of alloy metal from liquid state to solid state. The wall thickness of the product is uneven, and the thin-wall part solidifies first, hindering the flow and pressure transmission of the alloy liquid, and the local thick hot spot part cannot be compensated for shrinkage, thus forming a shrinkage cavity.

[0003] In view of such shrinkage cavity defects, using an extrusion pin for local pressurization is the most direct and effective process measure. However, due to the structural characteristics of some products having two adjacent hot spot parts, limited by the die space, it is necessary to adopt a structure of driving two extrusion pins by a single oil cylinder for local pressurization.

[0004] Such as Figure 1 shown, the common structural design of the one-driving-two extrusion pins in the prior art is that the extrusion pin ① is tightly fixed through the pressing plate ② and the connecting part ③, and after connecting the oil cylinder ④, the insertion and retraction actions are realized. However, in the case of unbalanced forces on the two extrusion pins in the above structure, the extrusion pin is prone to deformation due to its structural strength limitation, which will lead to the phenomenon of jamming between the extrusion pin and the extrusion pin sleeve. Content of the Utility Model

[0005] The purpose of the utility model is to provide an extrusion pin structure with a guiding device, aiming to solve the technical problem that in the existing one-driving-two extrusion pin structure, the extrusion pin is prone to jam with the extrusion pin sleeve.

[0006] To achieve the above purpose, the utility model provides an extrusion pin structure with a guiding device, including a driving device;

[0007] A connecting part, which is connected to the output end of the driving device, and the driving device is used to drive the connecting part to move up and down;

[0008] A guiding device, which is used to guide the up and down movement of the connecting part, and the connecting part is connected to the guiding device;

[0009] An extrusion pin, the extrusion pin is connected to the guiding device, so that the driving device synchronously drives the connecting part and the extrusion pin to move up and down;

[0010] An extrusion pin sleeve, the extrusion pin sleeve is arranged below the guiding device, and the lower end of the extrusion pin is movably arranged in the extrusion pin sleeve.

[0011] Preferably, at least two extrusion pins are connected to the guiding device.

[0012] Preferably, the guiding device includes a guide sleeve and a guide post. A sunken guiding groove is provided at the top end of the guide sleeve. The guide post is movably arranged in the guiding groove. The connecting part is detachably arranged above the guide post, such that: the driving device drives the connecting part and the guide post to move up and down along the guiding groove.

[0013] Preferably, the driving device includes an oil cylinder, an oil inlet pipe, an oil outlet pipe and a push rod. The oil cylinder is respectively connected to the oil inlet pipe and the oil outlet pipe. One end of the push rod is connected to the oil cylinder, and the other end thereof is detachably connected to the connecting part.

[0014] Preferably, an inverted T-shaped installation groove is provided on the connecting part. An opening is provided on one side of the installation groove. The bottom end of the push rod is clamped in the installation groove via the opening.

[0015] Preferably, a travel switch for detecting the moving positions of the push rod and the extrusion pin is further provided on the side wall of the oil cylinder.

[0016] Preferably, a limit groove and a first installation channel are provided on the guide post. The limit groove and the first installation channel communicate with each other. A second installation channel is provided on the guide sleeve. The top end of the extrusion pin is clamped in the limit groove, and the other end thereof sequentially passes through the first installation channel, the second installation channel and extends into the extrusion pin sleeve.

[0017] Preferably, the guide post and the connecting part are connected to each other by a plurality of connecting bolts.

[0018] Preferably, a plurality of first through holes are provided at the bottom end of the connecting part, and a plurality of second through holes are provided at the top end of the guide post. The first through holes and the second through holes correspond to each other one by one. Both ends of a positioning pin are respectively connected to the first through hole and the second through hole.

[0019] Preferably, a plurality of avoidance holes are further provided on the guide sleeve.

[0020] The utility model discloses an extrusion pin structure with a guiding device, which has the following beneficial effects: a guiding device is additionally provided to guide the movement process of the extrusion pin. The guiding device is composed of a guide sleeve and a guide post. By means of the guiding device, it is ensured that the extrusion pin always performs insertion and retraction actions on a vertical track, basically avoiding the situation of deflection and deformation of the extrusion pin, so that there is always a gap between the extrusion pin and the extrusion pin sleeve, avoiding jamming, reducing the failure rate of the extrusion pin structure, improving the production efficiency, and reducing the loss cost of the extrusion pin and the extrusion pin sleeve. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic structural diagram of a traditional extrusion pin structure;

[0023] Figure 2 It is a schematic structural diagram of the extrusion pin structure with a guiding device of the present invention;

[0024] Figure 3 It is a schematic cross-sectional structural diagram of the extrusion pin structure with a guiding device of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the guide post with an extrusion pin installed in the extrusion pin structure with a guiding device of the present invention;

[0026] Figure 5 It is a schematic structural diagram of the guide sleeve in the extrusion pin structure with a guiding device of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the guide post in the extrusion pin structure with a guiding device of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the connecting part in the extrusion pin structure with a guiding device of the present invention.

[0029] In the accompanying drawings: 1 - driving device, 11 - oil cylinder, 12 - oil inlet pipe, 13 - oil outlet pipe, 14 - push rod, 2 - connecting part, 21 - installation groove, 22 - opening, 23 - first through hole, 3 - guiding device, 31 - guide sleeve, 311 - guiding groove, 312 - second installation channel, 313 - avoidance hole, 32 - guide post, 321 - limiting groove, 322 - first installation channel, 323 - second through hole, 4 - extrusion pin, 5 - extrusion pin sleeve, 6 - travel switch, 7 - positioning pin.

[0030] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0032] It should be noted that if there are directional indications involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] As Figures 2 to 7 shown, a structure of an extrusion pin with a guiding device, a driving device 1;

[0035] A connecting portion 2, which is connected to the output end of the driving device 1, and the driving device 1 is used to drive the connecting portion 2 to move up and down;

[0036] A guiding device 3, which is used to guide the up and down movement of the connecting portion 2, and the connecting portion 2 is connected to the guiding device 3;

[0037] An extrusion pin 4, the extrusion pin 4 is connected to the guiding device 3, so that the driving device 1 synchronously drives the connecting portion 2 and the extrusion pin 4 to move up and down;

[0038] An extrusion pin sleeve 5, the extrusion pin sleeve 5 is arranged below the guiding device 3, and the lower end of the extrusion pin 4 is movably arranged in the extrusion pin sleeve 5.

[0039] In this solution, the extrusion pin 4 is arranged at the place where the air holes in the die-casting part are dense and / or prone to shrinkage cavities. During die-casting, the extrusion pin 4 is started to extrude the casting, so that the air holes and shrinkage cavities are compressed and reduced. In actual production, the extrusion pin 4 is usually a metal cylinder in the shape of a core, and extrudes the casting under the push of the driving device 1. As Figure 1As shown, in the existing structure of the extrusion pin 4, the auxiliary guiding function during the extrusion process of the extrusion pin 4 is mainly achieved through the clearance fit between the extrusion pin 4 and the extrusion pin sleeve 5. However, since the reasonable diameter of the extrusion pin 4 is between φ6 and 14, during use, due to the limitation of the structural strength of the extrusion pin 4, when the oil cylinder 11 drives the two extrusion pins 4 to move, deformation is likely to occur due to unbalanced force, and there is a phenomenon of jamming with the extrusion pin sleeve 5.

[0040] Therefore, in this solution, a guiding device 3 is added to guide the up and down movement of the extrusion pin 4. The guiding device 3 is connected to the driving device 1 through the connecting part 2. The extrusion pin 4 is arranged below the guiding device 3. By means of the guiding device 3, it is ensured that the extrusion pin 4 always performs insertion and retraction actions on the vertical track, basically avoiding the situation of deflection and deformation of the extrusion pin 4, so that there is always a gap between the extrusion pin 4 and the extrusion pin sleeve 5, avoiding jamming, reducing the failure rate of the structure of the extrusion pin 4, improving production efficiency, and reducing the loss cost of the extrusion pin 4 and the extrusion pin sleeve 5.

[0041] Furthermore, at least two of the extrusion pins 4 are connected to the guiding device 3. The structure of this solution is particularly suitable for the setting where one driving device 1 drives two extrusion pins 4 to move.

[0042] Of course, in other embodiments, the number of the extrusion pins 4 on the guiding device 3 and the corresponding extrusion pins 4 can be increased or decreased according to requirements.

[0043] Furthermore, the guiding device 3 includes a guide sleeve 31 and a guide post 32. A concave guiding groove 311 is provided at the top of the guide sleeve 31. The guide post 32 is movably arranged in the guiding groove 311. The connecting part 2 is detachably arranged above the guide post 32, so that: the driving device 1 drives the connecting part 2 and the guide post 32 to move up and down along the guiding groove 311.

[0044] The structure of the extrusion pin 4 in this solution includes a guiding device 3 composed of a guide sleeve 31 and a guide post 32. The driving device 1 is connected to the connecting part 2. The guide post 32 and the connecting part 2 are connected to clamp and fix the extrusion pin 4, so as to realize the insertion and retraction actions of the extrusion pin 4. Both the guide sleeve 31 and the extrusion pin sleeve 5 are installed and fixed on the external die carrier. By calculating the thermal expansion of the die steel material, the fit clearance between the guide post 32 and the guide sleeve 31 is reasonably set, so that the guide post 32 can move freely along the guiding groove 311. Since the dimensions of the guide post 32 and the connecting part 2 are approximate, the overall volume is larger, and it is usually made of metal material. Compared with the existing double-extrusion-pin-sleeve 5 auxiliary guiding structure, the strength is higher and the guiding performance is also better.

[0045] Further, the driving device 1 includes an oil cylinder 11, an oil inlet pipe 12, an oil outlet pipe 13, and a push rod 14. The oil cylinder 11 is respectively connected to the oil inlet pipe 12 and the oil outlet pipe 13. One end of the push rod 14 is connected to the oil cylinder 11, and the other end is detachably connected to the connecting portion 2.

[0046] The driving device 1 is mainly composed of an oil cylinder 11 and a push rod 14. The oil inlet pipe 12 and the oil outlet pipe 13 are connected to the outside. The oil cylinder 11 is respectively connected to the oil inlet pipe 12 and the oil outlet pipe 13 to cause the oil cylinder 11 to operate. The push rod 14 is a long strip-shaped cylinder. Its top end is connected to the oil cylinder 11, and the bottom end is connected to the connecting block. The connecting block, the guiding device 3, and the extrusion pin 4 are driven by the oil cylinder 11. Using the oil cylinder 11 as the power source, the overall structure is simple, and the movement can also be kept stable during multiple reciprocating movements.

[0047] Further, a travel switch 6 for detecting the moving positions of the push rod 14 and the extrusion pin 4 is also provided on the side wall of the oil cylinder 11. A triggering device cooperating with the travel switch 6 is connected to the push rod 14. The triggering device includes a first triggering site and a second triggering site. The two sites respectively correspond to the corresponding positions of the insertion and retraction actions of the extrusion pin 4. The travel switch 6 can control the forward and backward positions of the extrusion pin 4 to prevent the extrusion pin 4 from exceeding the action stroke.

[0048] Further, an inverted T-shaped installation groove 21 is provided on the connecting portion 2. An opening 22 is provided on one side of the installation groove 21. The bottom end of the push rod 14 is clamped in the installation groove 21 through the opening 22. To facilitate the disassembly between the push rod 14 and the connecting portion 2, an opening 22 is provided on one side of the connecting portion 2. Through this opening 22, the push rod 14 is convenient to be loaded onto and unloaded from the connecting portion 2. Since the connecting portion 2 is provided with an inverted T-shaped installation groove 21, the bottom end of the push rod 14 is snapped into the inverted T-shaped installation groove 21 to achieve fixation, and the connection relationship between the two is relatively stable.

[0049] Further, a limiting groove 321 and a first installation channel 322 are provided on the guide post 32. The limiting groove 321 and the first installation channel 322 communicate with each other. A second installation channel 312 is provided on the guide sleeve 31. The top end of the extrusion pin 4 is clamped in the limiting groove 321, and the other end sequentially passes through the first installation channel 322, the second installation channel 312, and extends into the extrusion pin sleeve 5.

[0050] As Figure 4As shown, the top diameter of the extrusion pin 4 is the largest. A limit groove 321 is provided on the guide post 32. The top end of the extrusion pin 4 can be stably engaged in the limit groove 321. The end of the extrusion pin 4 passes through the first installation channel 322 of the guide post 32 and the second installation channel 312 of the guide sleeve 31 and extends into the extrusion pin sleeve 5, ensuring the installation stability of the extrusion pin 4 and enabling the extrusion pin 4 to move synchronously with the guiding device 3 stably.

[0051] Furthermore, the guide post 32 and the connecting part 2 are connected to each other through a plurality of connecting bolts (not shown in the figure). In the above structure, the push rod 14 and the connecting part 2 are convenient for disassembly and assembly. In this embodiment, the connecting part 2 and the guiding device 3 are also convenient for disassembly and assembly. Specifically, the guide post 32 and the connecting part 2 are detachably connected through connecting bolts. Usually, 4 connecting bolts are arranged at the 4 corners of the guide post 32 to fix the guide sleeve 31 and the connecting part 2.

[0052] Furthermore, a plurality of first through holes 23 are provided at the bottom end of the connecting part 2, and a plurality of second through holes 323 are provided at the top end of the guide post 32. The first through holes 23 and the second through holes 323 correspond to each other one by one. Both ends of the positioning pin 7 are respectively connected to the first through hole 23 and the second through hole. In order to facilitate the quick alignment between the connecting part 2 and the guide post 32, a plurality of second through holes 323 are provided on the guide post 32, and a plurality of first through holes 23 are provided on the connecting part 2. Before installing the connecting bolts, first use the positioning pin 7 to position the connecting part 2 and the guide post 32, so that the bolt mounting holes of the guide post 32 and the connecting part 2 are relatively corresponding, which is convenient for the installation and fixation of the connecting bolts.

[0053] Furthermore, a plurality of avoidance holes 313 are also provided on the guide sleeve 31. In this embodiment, a plurality of avoidance holes 313 are also provided on the guide sleeve 31. The main purpose of the setting of the avoidance holes 313 is to provide clearance for the surrounding core pins. According to requirements, the avoidance holes 313 are provided at different parts of the guide sleeve 31.

[0054] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An extrusion pin structure with a guiding device, characterized in that, Comprising: A driving device (1); A connecting part (2), which is connected to the output end of the driving device (1), and the driving device (1) is used to drive the connecting part (2) to move up and down; A guiding device (3), which is used to guide the up and down movement of the connecting part (2), and the connecting part (2) is connected to the guiding device (3); A pressing pin (4), the pressing pin (4) is connected to the guiding device (3), so that the driving device (1) synchronously drives the connecting part (2) and the pressing pin (4) to move up and down; A pressing pin sleeve (5), the pressing pin sleeve (5) is arranged below the guiding device (3), and the lower end of the pressing pin (4) is movably arranged in the pressing pin sleeve (5).

2. The extrusion pin structure with a guiding device according to claim 1, characterized in that, At least two of the pressing pins (4) are connected to the guiding device (3).

3. The extrusion pin structure with a guiding device according to claim 1, characterized in that, The guiding device (3) includes a guide sleeve (31) and a guide post (32). A concave guiding groove (311) is provided at the top end of the guide sleeve (31), the guide post (32) is movably arranged in the guiding groove (311), and the connecting part (2) is detachably arranged above the guide post (32), so that: the driving device (1) drives the connecting part (2) and the guide post (32) to move up and down along the guiding groove (311).

4. A structure of an extrusion pin with a guiding device according to claim 1, characterized in that The driving device (1) includes an oil cylinder (11), an oil inlet pipe (12), an oil outlet pipe (13) and a push rod (14). The oil cylinder (11) is respectively connected to the oil inlet pipe (12) and the oil outlet pipe (13), one end of the push rod (14) is connected to the oil cylinder (11), and the other end thereof is detachably connected to the connecting part (2).

5. The extrusion pin structure with a guiding device according to claim 4, characterized in that, A travel switch (6) for detecting the moving positions of the push rod (14) and the pressing pin (4) is further provided on the side wall of the oil cylinder (11).

6. A pressing pin structure with a guiding device according to claim 4, characterized in that, An inverted T-shaped installation groove (21) is provided on the connecting part (2), an opening (22) is provided on one side of the installation groove (21), and the bottom end of the push rod (14) is clamped in the installation groove (21) through the opening (22).

7. The extrusion pin structure with a guiding device according to claim 3, characterized in that, A limiting groove (321) and a first installation channel (322) are provided on the guide post (32), the limiting groove (321) and the first installation channel (322) communicate with each other, a second installation channel (312) is provided on the guide sleeve (31), the top end of the pressing pin (4) is clamped in the limiting groove (321), and the other end thereof sequentially passes through the first installation channel (322), the second installation channel (312) and extends into the pressing pin sleeve (5).

8. The extrusion pin structure with a guiding device according to claim 3, characterized in that, The guide post (32) and the connecting part (2) are connected to each other by a plurality of connecting bolts.

9. The extrusion pin structure with a guiding device according to claim 3, characterized in that, A plurality of first through holes (23) are provided at the bottom end of the connecting part (2), a plurality of second through holes (323) are provided at the top end of the guide post (32), the first through holes (23) and the second through holes (323) correspond to each other one by one, and both ends of a positioning pin (7) are respectively connected to the first through hole (23) and the second through hole.

10. A structure of an extrusion pin with a guiding device according to claim 3, characterized in that, A plurality of avoiding holes (313) are further provided on the guide sleeve (31).

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