Structure facilitating die-casting forming and pulling-out of pump body part

Abstract

The structure comprises a fixed mold plate, a movable mold plate, an upper mold core and a lower mold core, the movable mold plate is provided with a first sliding block assembly and a second sliding block assembly, the two sides of the movable mold plate are provided with a first oil cylinder assembly and a second oil cylinder assembly respectively, the first oil cylinder assembly and the second oil cylinder assembly are connected with the first sliding block assembly and the second sliding block assembly respectively, and the first sliding block assembly comprises a sliding block base. One end of the sliding block seat is connected with the first oil cylinder assembly, the other end of the sliding block seat is connected with a sliding block mold core used for forming a pump body piece, inclined guide grooves penetrating through the top of the sliding block seat are formed in the two side wall faces of the sliding block seat respectively, and inclined guide keys are arranged at the positions, corresponding to the inclined guide grooves, of the fixed mold plate. According to the sliding block structure, at the moment of mold opening of the mold, the sliding block is pulled out through separation of the inclined guide keys and the inclined guide grooves installed on the two sides of the sliding block, the two sides of the sliding block are stressed, and it is guaranteed that stress is uniform, the directions are consistent, and clamping or deviation abrasion is avoided. Meanwhile, the sliding block is pulled out, the situation that the oil cylinder cannot be pulled out subsequently is avoided, the use tonnage of the oil cylinder can be reduced, poor die casting is reduced, aluminum or sundries are not prone to being clamped by the structure, maintenance and cleaning are convenient, and the die maintenance cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the die casting forming field especially relates to a structure convenient for pump body piece die casting forming pulling out. BACKGROUND

[0002] As Figure 1 The existing large excavator high-pressure pump body piece is shown, the maximum outer circle of the casting is phi 220mm, the total height is 190mm, the weight reaches 3.9kg, wherein the cavity inner diameter is phi 135mm and the casting inner wall has multiple asymmetric reinforcing ribs, and the depth is 125mm. Generally, die casting die is used for die casting forming production, the die uses 800 tons of high-pressure casting, is designed as one hole production, and the pump body cavity forming is realized in the form of pulling out sliding block. For the larger sliding block, the common structure is the cylindrical guide pillar guide sleeve form matched with the oil cylinder to complete the pulling out action.

[0003] In the implementation of the prior art, the inventor finds that:

[0004] The maximum diameter of the sliding block core part is 135mm, the minimum pulling out length is set as 130mm, and the inner wall draft angle is set as 1.5°. It can be seen that the sliding block pulling out stroke is too long. It can be understood that the pulling out stroke is too long, and the cylindrical guide pillar guide sleeve is generally designed in the middle of the sliding block when the mold is opened, and the manufacturing precision is high. Once the manufacturing error or the sliding block itself is not centered due to the holding force, the guide pillar guide sleeve will be not centered and not coincident, and the sliding block pulling out process is easy to be deviated or stuck, and due to the problem of multiple asymmetric reinforcing ribs on the inner wall of the casting, the sliding block pulling out is not uniform during the mold opening process, which causes the sliding block to be deviated, and these are easy to cause the die casting size to be poor, the mold maintenance cost to be high, and the die casting efficiency to be low.

[0005] Therefore, it is necessary to provide a technical scheme for ensuring that the sliding block is uniformly stressed and smoothly pulled out during the pulling out stroke process to solve the problem of poor die casting size, high mold maintenance cost and low die casting efficiency caused by the easy deviation, sticking or deviation of the sliding block in the prior art. SUMMARY

[0006] The embodiments of the present application provide a technical scheme for ensuring that the sliding block is uniformly stressed and smoothly pulled out to solve the problem of poor die casting size, high mold maintenance cost and low die casting efficiency caused by the easy deviation, sticking or deviation of the sliding block in the prior art.

[0007] Specifically, the structure for facilitating the ejection of a pump body part in die casting forming includes a fixed mold plate, a movable mold plate, an upper mold core and a lower mold core for forming the pump body part installed between the fixed mold plate and the movable mold plate, the movable mold plate is installed with a slider assembly one and a slider assembly two for slidingly pulling out the formed pump body part, and the movable mold plate is installed with an oil cylinder assembly one and an oil cylinder assembly two on both sides and connected with the slider assembly one and the slider assembly two, the slider assembly one includes a slider seat, one end of the slider seat is connected with the oil cylinder assembly one, and the other end is connected with a slider core for forming the pump body part, and the both side walls of the slider seat are respectively provided with a slanting guide groove penetrating through the top of the slider seat, and the fixed mold plate is provided with a slanting guide key corresponding to the slanting guide groove.

[0008] Further, the inclination direction of the slanting guide groove and the sliding direction of the slider seat are obtuse.

[0009] Further, the slanting guide key and the fixed mold plate are connected through bolts.

[0010] Further, the slider seat is further provided with a slanting wedge block, the fixed mold plate is provided with a slanting wedge groove corresponding to the slanting wedge block, and the slider seat and the slanting wedge block are connected through bolts.

[0011] Further, the movable mold plate is provided with sliding guide rails on both sides of the slider seat of the slider assembly one.

[0012] Further, the movable mold plate is provided with a wear plate at the bottom of the slider seat of the slider assembly one.

[0013] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0014] The structure for facilitating the ejection of a pump body part in die casting forming provided by the application avoids the problems of long pulling-out stroke, non-central force of a cylindrical guide post at the initial mold opening, large holding force and uneven force caused by multiple asymmetric reinforcing ribs on the inner wall of the casting, and sliding block pulling-out deflection. Instead, the slanting guide key and the guide groove installed on both sides of the slider are separated at the moment of mold opening, the slider is pulled out, the slider is subjected to force on both sides, the force is uniform and consistent in direction, and the slider is not stuck or deflected. Meanwhile, the pulling-out of the slider avoids the subsequent pulling-out failure of the oil cylinder and reduces the tonnage of the oil cylinder, reduces the die casting defects, the structure is not easy to be stuck with aluminum or sundries, the maintenance and cleaning are convenient, and the mold maintenance cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the application, constitute a part of the application, and are used to explain the application and do not constitute an improper limitation on the application. In the drawings:

[0016] Figure 1A schematic view of a large excavator high-pressure pump body provided by the embodiment of the present application;

[0017] Figure 2 A schematic view of a structure facilitating the die casting forming and pulling out of a pump body provided by the embodiment of the present application;

[0018] Figure 3 A partial schematic view of a structure facilitating the die casting forming and pulling out of a pump body provided by the embodiment of the present application;

[0019] Figure 4 A schematic view of a fixed die plate provided by the embodiment of the present application;

[0020] Figure 5 A schematic view of an inclined guide key provided by the embodiment of the present application;

[0021] Reference signs:

[0022] A structure facilitating the die casting forming and pulling out of a pump body-100;

[0023] Fixed die plate-1; inclined guide key-12; inclined wedge groove-13;

[0024] Moving die plate-2; lower die core-21;

[0025] Slide block assembly one-22; slide block seat-221; inclined wedge block-222; sliding guide rail-223; wear plate-224; slide block core-225; inclined guide groove-2211;

[0026] Slide block assembly two-23;

[0027] Oil cylinder assembly one-24;

[0028] Oil cylinder assembly two-25;

[0029] A large excavator high-pressure pump body-3 provided by the prior art. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in combination with the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0031] Please refer to Figure 1As shown in the schematic view of the existing large excavator high-pressure pump body part 3, the maximum outer circle of the casting is φ220mm, the total height is 190mm, and the weight is up to 3.9kg, wherein the inner diameter of the cavity is φ135mm and the inner wall of the casting has multiple asymmetric reinforcing ribs with a depth of 125mm. In the production process of die casting, the pulling length is set to 130mm, that is, the pulling stroke is too long. It can be understood that the pulling stroke is too long, and when the mold is opened, since the cylindrical guide column guide sleeve is designed in the middle of the slider, once the manufacturing error or the self-holding force of the slider is not centered, the guide column guide sleeve will be stressed and not centered, which will cause the slider to be pulled and offset or stuck. In addition, due to the problem of multiple asymmetric reinforcing ribs on the inner wall of the casting, the inner wall of the casting holds tightly and is unevenly stressed when the slider is pulled during the mold opening process, which causes the slider to be pulled and skewed. These are prone to cause the size of the die casting to be poor, the mold maintenance cost to be high, and the die casting efficiency to be low.

[0032] Based on the above problems, as shown in the schematic view of the existing large excavator high-pressure pump body part 3, the maximum outer circle of the casting is φ220mm, the total height is 190mm, and the weight is up to 3.9kg, wherein the inner diameter of the cavity is φ135mm and the inner wall of the casting has multiple asymmetric reinforcing ribs with a depth of 125mm. In the production process of die casting, the pulling length is set to 130mm, that is, the pulling stroke is too long. It can be understood that the pulling stroke is too long, and when the mold is opened, since the cylindrical guide column guide sleeve is designed in the middle of the slider, once the manufacturing error or the self-holding force of the slider is not centered, the guide column guide sleeve will be stressed and not centered, which will cause the slider to be pulled and offset or stuck. In addition, due to the problem of multiple asymmetric reinforcing ribs on the inner wall of the casting, the inner wall of the casting holds tightly and is unevenly stressed when the slider is pulled during the mold opening process, which causes the slider to be pulled and skewed. These are prone to cause the size of the die casting to be poor, the mold maintenance cost to be high, and the die casting efficiency to be low. Figures 2-4 The structure 100 for facilitating the die casting forming and pulling out of the pump body part is provided, which comprises a fixed mold plate 1, a movable mold plate 2, and an upper mold core (not shown in the figure) and a lower mold core 21 for forming the pump body part installed between the fixed mold plate 1 and the movable mold plate 2. The movable mold plate 2 is provided with a slider assembly one 22 and a slider assembly two 23 for sliding and pulling out the formed pump body part. The movable mold plate 2 is provided with an oil cylinder assembly one 24 and an oil cylinder assembly two 25 on both sides thereof, which are connected to the slider assembly one 22 and the slider assembly two 23, respectively. The slider assembly one 22 comprises a slider seat 221, one end of which is connected to the oil cylinder assembly one 24, and the other end is connected to a slider core 225 for forming the pump body part. The slider seat 221 is provided with a slanting guide groove 2211 on both side walls thereof, which penetrates the top of the slider seat 221. The fixed mold plate 1 is provided with a slanting guide key 12 corresponding to the slanting guide groove 2211.

[0033] Specifically, when the pump body part is formed by the die casting mold, in addition to the fixed mold plate 1, the movable mold plate 2, the upper mold core, and the lower mold core 21, a pouring system, an ejection structure, and the like are used to realize the forming of the pump body part die casting mold. It should be understood that the present application mainly improves the structure of the pump body part forming and pulling out on the basis of the existing technology, and therefore the pouring system and the ejection structure in the die casting mold which are not improved in the present application will not be described in detail.

[0034] Specifically, the slider assembly one 22 and the slider assembly two 23 are installed on the movable mold plate 2 and located on both sides of the lower mold core 21. The movable mold plate 2 is provided with an oil cylinder assembly one 24 and an oil cylinder assembly two 25 on both sides thereof for sliding the slider assembly one 22 and the slider assembly two 23. It can be understood that the oil cylinder assembly one 24 or two is provided with at least a driving oil cylinder, a driving rod, or the like for driving the slider assembly one 22 or two to slide in or out.

[0035] The slider assembly one 22 includes a slider seat 221 and a slider core 225. It can be understood that one end of the slider core 225 is connected with the slider seat 221, and the slider core 225 changes with the change of the position of the slider seat 221 when the slider seat 221 is driven by the oil cylinder assembly one 24. The other end of the slider core 225 is a forming surface for forming the inner wall of the pump body part.

[0036] It can be understood that in the past, the cylindrical guide pillar guide sleeve is arranged in the middle of the slider, mainly for a short pulling stroke, and when the pulling stroke is too long, the guide pillar guide sleeve is not centered under the stress due to manufacturing errors or the self-holding force of the slider, which further causes the slider to be easily deviated or stuck during the pulling process. The inclined guide groove 2211 penetrating the top of the slider seat 221 is arranged on both sides of the slider seat 221, and the position corresponding to the inclined guide groove 2211 of the fixed mold plate 1 is provided with an inclined guide key 12. This can ensure that the slider seat 221 is stressed on both sides during the pulling process, that is, bidirectional stress and consistent direction.

[0037] Further, the inclination direction of the inclined guide groove 2211 and the sliding direction of the slider seat 221 form an obtuse angle. It can be understood that the inclination direction of the inclined guide groove 2211 is the same as the direction of the inclined guide key 12, and the sliding direction of the slider seat 221 and the inclined guide key 12 also form an obtuse angle. At the moment of mold opening, the inclined guide key 12 in the inclined guide groove 2211 on both sides of the slider seat 221 is in contact with the slider seat 221, and the slider seat 221 is slid out, that is, the slider seat 221 is stressed on both sides and the direction is consistent.

[0038] In addition, in the past, due to the multiple asymmetric reinforcing ribs in the inner wall of the casting, the slider is pulled during mold opening, the holding force of the inner wall of the casting is large and the stress is uneven, which causes the slider to be deviated during pulling. Through the arrangement of the inclined guide key 12 and the inclined guide groove 2211, at the moment of mold opening, the slider is uniformly pushed out by the inclined guide key 12 in the inclined guide groove 2211 on both sides, and the slider core 225 is also relatively uniformly separated from the pump body part, avoiding the problem of uneven stress. In addition, the slider core 225 is separated from the pump body part, avoiding the problem that the oil cylinder assembly needs a large tonnage to pull out the casting.

[0039] It should be pointed out that the slider core 225 in the slider assembly one 22 is mainly used for forming the inner wall of the pump body part and is pulled out by the oil cylinder assembly one 24. The slider in the slider assembly two 23 is mainly used for forming the resistance to the pump body part. The position of the slider in the slider assembly two 23 is controlled by the oil cylinder assembly two 25. It can be understood that the slider core 225 in the slider assembly one 22 refers to the slider.

[0040] Further, the inclined guide key 12 is connected with the fixed mold plate 1 through bolts. It can be understood that when the mold is opened, the inclined guide key 12 is separated from the inclined guide groove 2211 on the slide block seat 221. It should be pointed out that in the present application, the design of the inclined guide key 12 according to the size of the clamping force of the slide block core 225 determines whether the inclined guide key 12 is partially inserted into the inclined guide groove 2211 or fully inserted into the inclined guide groove 2211. In an embodiment provided in the present application, as shown in Figure 5 the inclined guide key 12 is partially inserted into the inclined guide groove 2211.

[0041] Further, the slide block seat 221 is also provided with an inclined wedge block 222, and the fixed mold plate 1 is provided with an inclined wedge groove 13 corresponding to the position of the inclined wedge block 222. The slide block seat 221 and the inclined wedge block 222 are connected through bolts.

[0042] Specifically, the inclined wedge block 222 is used to realize the movement of the slide block seat 221 and the slide block core 225 along the predetermined path during the die casting process, and prevent the slide block seat 221 and the slide block core 225 from deviating or vibrating under force. It can be understood that when the mold is opened, the inclined guide key 12 of the fixed mold plate 1 is separated from the inclined guide groove 2211, and the inclined wedge block 222 is separated from the inclined wedge groove 13 of the fixed mold plate 1.

[0043] Further, the movable mold plate 2 is provided with sliding guide rails 223 on both sides of the slide block seat 221 of the slide block assembly 22, and is provided with a wear plate 224 at the bottom of the slide block seat 221 of the slide block assembly 22. It can be understood that the arrangement of the sliding guide rails 223 and the wear plate 224 ensures the accuracy of the sliding of the slide block assembly 22 when it is driven to slide by the oil cylinder assembly 24.

[0044] Specifically, the structure provided in the present application for facilitating the die casting and pulling out of the pump body part, in actual application, is characterized in that:

[0045] At the moment when the die casting mold is opened, the fixed mold plate 1 and the movable mold plate 2 are separated, the two inclined guide keys 12 of the fixed mold plate 1 are respectively separated from the inclined guide grooves 2211 on both sides of the slide block seat 221, and the slide block seat 221 is pushed out in the pulling direction, and the corresponding slide block core 225 is also pushed out. The arrangement of the two inclined guide keys 12 ensures that the slide block seat 221 and the slide block core 225 are uniformly stressed on both sides, and the pulling out of the slide block core 225 avoids the problem of multiple asymmetric reinforcing ribs on the inner wall of the casting. During the opening process, the slide block is pulled out, the clamping force of the slide block core 225 on the inner wall of the casting is large and the stress is uneven, which causes the slide block to be pulled out by the oil cylinder and deviate. At the same time, the inclined wedge block 222 is separated from the inclined wedge groove 13 of the fixed mold plate 1, and then the oil cylinder assembly 24 drags the slide block seat 221 to push out the slide block core 225 along the guide rail on the wear plate 224, the mold ejection mechanism pushes out the casting, and the die casting process is completed. The fixed mold plate and the movable mold plate are closed, the inclined guide key 12 and the inclined wedge block 222 are reset, and the next cycle is entered.

[0046] It should be noted that, as used in this application, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "comprised of does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0047] The embodiments of the present application described hereinabove are intended to be merely exemplary and those skilled in the art will be able to make numerous changes and modifications without departing from the spirit and scope of the present application. Accordingly, all such changes and modifications are considered as falling within the scope of the present application as defined by the appended claims.

Claims

1. A structure for facilitating the ejection of a pump body part in a die casting process, comprising a fixed die plate, a movable die plate, an upper die core and a lower die core for forming a pump body part, which are installed between the fixed die plate and the movable die plate, a slider assembly one and a slider assembly two for slidingly ejecting the formed pump body part, which are installed on the movable die plate, and a cylinder assembly one and a cylinder assembly two, which are installed on both sides of the movable die plate to be connected to the slider assembly one and the slider assembly two, respectively, characterized in that, The slider assembly comprises a slider base, one end of which is connected with the oil cylinder assembly, and the other end is connected with a slider core for forming a pump body part, and oblique guide grooves are formed on the two side walls of the slider base and extend through the top of the slider base, and the position corresponding to the oblique guide grooves of the fixed die plate is provided with oblique guide keys.

2. The structure of claim 1, wherein The oblique direction of the oblique guide grooves and the sliding direction of the slider base form an obtuse angle.

3. The structure of claim 1, wherein The oblique guide keys and the fixed die plate are connected through bolts.

4. The structure of claim 1, wherein The slider base is further provided with an oblique wedge block, the position corresponding to the oblique wedge block of the fixed die plate is provided with an oblique wedge groove, and the slider base and the oblique wedge block are connected through bolts.

5. The structure of claim 1, wherein The movable die plate is provided with sliding guide rails on both sides of the slider base of the slider assembly.

6. The structure of claim 5, wherein The movable die plate is provided with a wear-resistant plate at the bottom of the slider base of the slider assembly.

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