Coupling assembly for a ram and method for quick maintenance of ram wear parts

Abstract

The application provides a coupling assembly for a plunger and a method for quickly maintaining a plunger wearing part, which indirectly increases the length of the plunger through an adjustable coupling assembly, so that the plunger can extend out of the mold for a sufficient length, the wearing part of the plunger head is conveniently replaced, the downtime of the equipment is reduced, and the utilization rate of the equipment and the output are improved. The coupling assembly comprises a coupling and a pressing sleeve matched with the plunger for fixing the plunger; the inner space of the plunger side shaft sleeve of the coupling contains the pressing sleeve in addition to containing the flange at the tail end of the plunger; the pressing sleeve is embedded in the gap between the plunger and the plunger side shaft sleeve during normal operation of the plunger; the flange at the tail end of the plunger is located at the rear end of the pressing sleeve; when the plunger is maintained, the flange at the tail end of the plunger is pushed to the front end of the plunger side shaft sleeve; and the pressing sleeve is located at the rear end of the flange at the tail end of the plunger.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die casting equipment, in particular to a coupling assembly for a pressure injection punch and a method for quickly maintaining the vulnerable parts of the pressure injection punch. BACKGROUND

[0002] The production of shaped products or structural parts by die casting equipment has the advantages of high production efficiency, high material utilization rate, low technical level requirement for operators, etc., and is adopted by manufacturers in the aerospace, automobile industry and other industries. During the die casting process, molten metal liquid (such as aluminum liquid) is extruded into the cavity of the mold through the pressure injection punch under certain pressure and speed. The sealing ring (usually a copper ring) at the front end of the pressure injection punch plays a sealing and friction-reducing role and is easily worn, belonging to consumable parts.

[0003] At present, one problem that plagues most die casting aluminum manufacturers is that the copper ring of the pressure injection punch needs to be replaced every 1500 to 3000 die cycles as production proceeds, the replacement frequency is high, and the replacement results in a long downtime, affecting the equipment operation rate. The fastest copper ring replacement method at present is to extend the punch from the fixed mold side and replace it, however, this method mainly depends on the equipment having a long pressure injection distance, enabling the punch to be extended from the front end and fully considering the process requirements at the initial design of the mold, such as the filling degree of the material cylinder, the pressure injection distance and the thickness of the fixed mold, etc., so as to reserve sufficient distance for the punch to extend from the fixed mold side. In actual production, some products have to sacrifice the punch extension distance to balance the process requirements. When the copper ring needs to be replaced for this part of the mold, the punch and the pressure injection rod need to be lifted out from the pressure injection end for replacement, which is time-consuming and labor-intensive, and at least 1 to 2 hours are needed for single replacement, seriously affecting the output. SUMMARY

[0004] Since the existing technology has the defect that replacing the sealing ring of the pressure injection punch results in a long downtime, the present application provides a coupling assembly for a pressure injection punch and a method for quickly maintaining the vulnerable parts of the pressure injection punch, which indirectly increases the length of the pressure injection punch through an adjustable coupling assembly, so that it can be extended to a sufficient length from the mold, facilitating the replacement of the vulnerable parts of the punch head, reducing the downtime of the equipment, and improving the utilization rate of the equipment and the output.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application provides a coupling assembly for a pressure injection punch, comprising a coupling, one side of the coupling is connected to a driving motor through a shaft sleeve, and the other side is nested with the pressure injection punch through a shaft sleeve; further comprising a pressure sleeve for fixing the pressure injection punch;

[0006] The inner space of the shaft sleeve of the coupling on the punch side contains not only the flange at the tail end of the punch, but also the pressure sleeve;

[0007] When the injection punch is in normal operation, the pressing sleeve is embedded in the gap between the injection punch and the punch side shaft sleeve; and the punch tail flange is located at the rear end of the pressing sleeve.

[0008] When the injection punch is maintained, the punch tail flange is pushed towards the front end of the punch side shaft sleeve; and the pressing sleeve is located at the rear end of the punch tail flange.

[0009] The coupling assembly can indirectly increase the length of the injection punch by adjusting the position of the pressing sleeve to move the injection punch back and forth in the coupling, so that the part to be maintained is exposed, thereby greatly reducing the operation difficulty and shortening the replacement time.

[0010] Further, the fixing assembly of the punch tail flange comprises a backing plate and a punch pressing plate.

[0011] The sidewall of the punch side shaft sleeve of the coupling is open, and the space in the shaft sleeve accommodates the punch tail flange, the pressing sleeve and the backing plate; the punch pressing plate is arranged at the opening of the sidewall of the shaft sleeve, presses the backing plate, and is detachably fixedly connected with the backing plate.

[0012] When the injection punch is in normal operation, the pressing sleeve is embedded in the gap between the injection punch and the punch side shaft sleeve; the punch tail flange is arranged between the pressing sleeve and the backing plate; the punch pressing plate is arranged at the opening of the sidewall of the shaft sleeve, presses the backing plate, and clamps the punch tail flange, and is detachably fixedly connected with the backing plate.

[0013] When the injection punch is maintained, the punch tail flange is pushed towards the front end of the punch side shaft sleeve; the pressing sleeve is embedded in the punch side shaft sleeve, and is arranged between the punch tail flange and the backing plate.

[0014] By adopting the above technical scheme, the backing plate and the punch pressing plate help to ensure that the punch does not move and rotate during pushing and pulling.

[0015] Further, the pressing sleeve is an open ring block, comprising arc-shaped plates on both sides of the opening and a limiting connecting plate therebetween.

[0016] When the injection punch is in normal operation, the arc-shaped plates of the pressing sleeve are embedded in the gap between the injection punch and the punch side shaft sleeve, and the limiting connecting plate is detachably fixedly connected with the opening surface of the punch side shaft sleeve.

[0017] When the injection punch is maintained, the pressing sleeve is embedded in the punch side shaft sleeve and located at the rear end of the punch tail flange.

[0018] The arc-shaped plate of the pressing sleeve is embedded in the gap between the injection punch and the punch-side shaft sleeve, and is located at the rear end of the punch tail flange, so that the pressing sleeve and the injection punch move integrally during movement of the injection punch.

[0019] Further, the limiting connecting plate is provided with a notch to avoid the lubricating oil port of the injection punch.

[0020] Further, the coupling connecting section of the injection punch is provided with a cooling water joint; and the sidewall of the punch-side shaft sleeve of the coupling is provided with a through hole for the cooling water joint to pass through and move.

[0021] In the second aspect, the application provides a method for quickly maintaining the vulnerable parts of an injection punch, wherein the injection punch adopts the coupling assembly as described above, and the method comprises the following maintenance steps:

[0022] S1, loosening the injection punch in the punch-side shaft sleeve of the coupling, and taking out the pressing sleeve;

[0023] S2, pre-positioning the injection punch to the front-side limiting step of the punch-side shaft sleeve of the coupling;

[0024] S3, re-putting the pressing sleeve into the rear end of the punch tail flange, and fixing the injection punch; at this time, the head of the injection punch is exposed from the mold;

[0025] S4, a person performs maintenance on the vulnerable parts of the head of the injection punch;

[0026] S5, after the maintenance is completed, loosening the injection punch, and taking out the pressing sleeve;

[0027] S6, pushing the injection punch to the rear-side limiting step of the punch-side shaft sleeve of the coupling;

[0028] S7, re-putting the pressing sleeve into the front end of the punch tail flange, and fixing the injection punch.

[0029] Further, the vulnerable parts of the head of the injection punch are copper rings.

[0030] Further, the copper rings are coaxial two copper rings.

[0031] Compared with the prior art, the application has the following advantages or beneficial effects:

[0032] (1) The application overcomes the problems of difficult replacement of copper rings and long replacement time caused by the limitations of the equipment itself and process design in structure and use, improves the production efficiency, is safe and reliable, convenient to operate, and shortens the equipment downtime.

[0033] (2) The coupling assembly of the application has simple structure, is easy to manufacture, and has low updating cost. Attached Figure Description

[0034] The invention, its features and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the installation structure of the injection punch in a conventional coupling.

[0036] Figure 2 A three-dimensional structural diagram of a traditional coupling;

[0037] Figure 3 This is a three-dimensional structural diagram of the coupling in one embodiment of the present invention;

[0038] Figure 4 This is a three-dimensional structural diagram of the pressure sleeve in one embodiment of the present invention;

[0039] Figure 5 for Figure 4 Top view of the intermediate pressure sleeve;

[0040] Figure 6 This is a schematic diagram showing the positional relationship between the injection punch and the coupling assembly during normal production in one embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram showing the positional relationship between the injection punch and the coupling assembly during punch maintenance in one embodiment of the present invention;

[0042] Figure 8 This is a cross-sectional view of the installation state of the injection punch during normal production in one embodiment of the present invention;

[0043] Figure 9 This is a cross-sectional view of the installation state of the injection punch during maintenance in one embodiment of the present invention;

[0044] The attached figures are labeled as follows: 100, conventional coupling; 10, coupling; 11, opening face; 12, through hole; 13, front limiting step; 14, rear limiting step; 20, injection punch; 21, punch tail flange; 22, cooling water connector; 23, copper ring; 24, lubricating oil port; 30, pressure sleeve; 31, arc plate; 32, limiting connecting plate; 33, notch; 40, pad plate; 50, punch pressing plate; 60, fixed mold; 70, material cylinder. Detailed Implementation

[0045] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. It should be understood that all the exemplary embodiments described are merely part of, but not all of the present disclosure. Rather, these exemplary embodiments are provided so that those skilled in the art can have a more thorough understanding of the present disclosure and can more completely convey the technical content of the present disclosure to those skilled in the art.

[0046] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "arrange", "mount", and "connect" should be understood in a broad sense, for example, the connection mode can be welding, clamping, or threaded connection or binding connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "front", "rear", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and do not require the present application to be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the present application.

[0047] As prior art, see Figure 1 and Figure 2 The traditional coupling 100 connects the driving motor on one side of the shaft sleeve, and the other side of the shaft sleeve is clamped with the tail flange 21 of the injection punch, which simply serves to connect the two shafts and transmit power and motion. The traditional coupling 100 cannot change the advancing position of the injection punch 20 in use.

[0048] Referring to Figures 3 to 7 The present application provides a coupling assembly for injection punch, which comprises a coupling 10, one side of the coupling 10 is connected with a driving motor through a shaft sleeve, and the other side of the shaft sleeve is nested with an injection punch 20; further comprising a pressure sleeve 30 for fixing the injection punch 20; the inner space of the shaft sleeve on the punch side of the coupling 10 contains the pressure sleeve 30 in addition to the tail flange 21 of the injection punch.

[0049] Referring to Figure 6 When the injection punch 20 is working normally, the pressure sleeve 30 is embedded in the gap between the injection punch 20 and the shaft sleeve on the punch side; the tail flange 21 of the injection punch is located at the rear end of the pressure sleeve 30;

[0050] Referring to Figure 7 When the injection punch 20 is maintained, the tail flange 21 of the injection punch is pushed to the front end of the shaft sleeve on the punch side; the pressure sleeve 30 is located at the rear end of the tail flange 21 of the injection punch.

[0051] The quick maintenance of the vulnerable parts of the head of the injection punch by using the coupling assembly described above includes the following steps:

[0052] S1, loosen the punch side shaft sleeve of the coupling 10 inside the injection punch 20, take out the pressure sleeve 30;

[0053] S2, the injection punch 20 is positioned in front of the punch side shaft sleeve of the coupling 10, and the front side limiting step 13 is taken out;

[0054] S3, the pressure sleeve 30 is re-placed in the rear end of the punch tail flange 21, and the injection punch 20 is fixed; at this time, the head of the injection punch 20 is exposed from the mold;

[0055] S4, personnel maintenance of the vulnerable parts of the head of the injection punch 20;

[0056] S5, after maintenance, loosen the injection punch 20, take out the pressure sleeve 30;

[0057] S6, push the injection punch 20 to the rear side limiting step 14 of the punch side shaft sleeve of the coupling 10;

[0058] S7, the pressure sleeve 30 is re-placed in the front end of the punch tail flange 21, and the injection punch 20 is fixed.

[0059] The coupling assembly of the application can indirectly increase the length of the injection punch 20 by adjusting the position of the pressure sleeve 30 to move the injection punch 20 inside the coupling 10, and can expose the part to be maintained when the punch vulnerable part is maintained, which can greatly reduce the operation difficulty of replacing the vulnerable part and shorten the replacement time.

[0060] The technical content of the application will be further illustrated by specific examples.

[0061] The injection punch coupling assembly provided by the embodiment includes a coupling 10 and a pressure sleeve 30 for fixing the injection punch 20. One side of the coupling 10 is connected to a driving motor, and the other side is nested with the injection punch 20. The internal space of the punch side shaft sleeve of the coupling 10 contains the punch tail flange 21 and the pressure sleeve 30.

[0062] The fixing assembly of the punch tail flange 21 can also include a backing plate 40 and a punch pressing plate 50. The punch side shaft sleeve of the coupling 10 has an opening in the side wall, and the internal space of the shaft sleeve contains the punch tail flange 21, the pressure sleeve 30 and the backing plate 40; the punch pressing plate 50 is arranged at the opening of the shaft sleeve side wall, presses the backing plate 40, and is detachably fixedly connected with the backing plate 40.

[0063] Referring to Figure 8When the injection punch 20 is in normal operation, the pressing sleeve 30 is embedded in the gap between the injection punch 20 and the punch-side shaft sleeve; the punch tail flange 21 is arranged between the pressing sleeve 30 and the backing plate 40; the punch pressing piece 50 is arranged at the opening of the sidewall of the shaft sleeve, presses the backing plate 40, and is detachably fixedly connected with the backing plate 40 through the bottom surface groove clamping the punch tail flange 21. The connection mode is exemplified as bolt connection. The cooperation connection of the backing plate 40 and the punch pressing piece 50 with the punch ensures that the punch does not move and rotate in the process of pushing and pulling.

[0064] Referring to Figure 9 When the injection punch 20 is maintained, the punch pressing piece 50 is loosened, the pressing sleeve 30 is taken out, and the punch tail flange 21 is pushed to the front end of the punch-side shaft sleeve; the pressing sleeve 30 is re-embedded in the punch-side shaft sleeve and arranged between the punch tail flange 21 and the backing plate 40.

[0065] As a preferred technical solution, referring to Figure 4 and Figure 5 The pressing sleeve 30 is an open ring block, including arc-shaped plates 31 on both sides of the opening and a limiting connection plate 32 therebetween.

[0066] When the injection punch 20 is in normal operation, the arc-shaped plates 31 of the pressing sleeve 30 are embedded in the gap between the injection punch 20 and the punch-side shaft sleeve, and the limiting connection plate 32 is detachably fixedly connected with the opening face 11 of the punch-side shaft sleeve.

[0067] When the injection punch 20 is maintained, the pressing sleeve 30 is embedded in the punch-side shaft sleeve and located at the rear end of the punch tail flange 21.

[0068] By adopting the above technical solution, the arc-shaped plates 31 of the pressing sleeve are embedded in the gap between the injection punch 20 and the punch-side shaft sleeve and located at the rear end of the punch tail flange 21, so that the pressing sleeve and the injection punch 20 realize integral movement in the movement process of the injection punch 20.

[0069] Referring to Figure 4 and Figure 8 For the case that the lubricating oil port is arranged at the tail end of the injection punch 20, the limiting connection plate 32 is provided with a notch 33 to avoid the lubricating oil port 24 of the injection punch 20.

[0070] Referring to Figure 8 and Figure 9 For the case that the coupling connection section of the injection punch 20 is provided with the cooling water connector 22, the sidewall of the punch-side shaft sleeve of the coupling 10 is provided with a through hole 12 for the cooling water connector 22 to pass through and move.

[0071] When the normal production, the sleeve 30 in the front side of the coupling 10, the punch tail flange 21 and the pad plate 40 contact, when the need to replace the copper ring 23 of the injection punch head, the sleeve 30 is taken out, and the injection punch 20 is moved forward by pushing the coupling 10, and the pad plate 40 and the punch tail flange 21 are moved backward, and the space between the pad plate 40 and the punch tail flange 21 is just enough to put the sleeve 30, and the sleeve 30 is put into the coupling 10 again, and the pad plate 40, the sleeve 30 and the injection punch 20 are arranged from the injection end to the mold end, and the injection punch 20 is continuously pushed forward to the maximum value, and the injection punch 20 is stretched out at the front end of the die mold 60 and the cylinder 70 after the effect of the above-mentioned steps is reversed, and the personnel maintain one or two layers of copper ring 23 (such as replacement). After the maintenance is completed, the above-mentioned steps are installed in reverse order, and the production can be smoothly carried out. The copper ring replacement time of the coupling mechanism of the present application is reduced to 15 minutes, and the replacement efficiency is greatly improved, and the actual efficiency is improved by more than 75%. Figure 9 The effect after the above-mentioned steps are reversed, and the injection punch 20 is stretched out at the front end of the die mold 60 and the cylinder 70, and the personnel maintain one or two layers of copper ring 23 (such as replacement). After the maintenance is completed, the above-mentioned steps are installed in reverse order, and the production can be smoothly carried out. The copper ring replacement time of the coupling mechanism of the present application is reduced to 15 minutes, and the replacement efficiency is greatly improved, and the actual efficiency is improved by more than 75%.

[0072] It should be noted that the coupling in the present application can be a diaphragm coupling, and its working principle is the prior art known by those skilled in the art.

[0073] The preferred embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications to the technical solutions of the present application by using the disclosed methods and technical contents without departing from the scope of the technical solutions of the present application, or modify equivalent embodiments, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solutions of the present application, all still belong to the scope of protection of the technical solutions of the present application.

Claims

1. A coupling assembly for a plunger, comprising a coupling (10), one side of the coupling (10) is connected with a driving motor through a shaft sleeve, and the other side of the coupling (10) is nested with the plunger (20); characterized in that: Further comprising a pressing sleeve (30) for fixing the injection punch (20); The inner space of the punch side shaft sleeve of the coupling (10) contains the punch tail flange (21) and the pressing sleeve (30) in addition to the punch tail flange (21); When the injection punch (20) is in normal operation, the pressing sleeve (30) is embedded in the gap between the injection punch (20) and the punch side shaft sleeve; the punch tail flange (21) is located at the rear end of the pressing sleeve (30); When the injection punch (20) is maintained, the punch tail flange (21) is pushed towards the front end of the punch side shaft sleeve; the pressing sleeve (30) is located at the rear end of the punch tail flange (21).

2. A coupling assembly for a plugger punch as claimed in claim 1, wherein, The fixing assembly of the punch tail flange (21) comprises a backing plate (40) and a punch pressing plate (50); The sidewall of the punch side shaft sleeve of the coupling (10) is opened, and the inner space of the shaft sleeve contains the punch tail flange (21), the pressing sleeve (30) and the backing plate (40); the punch pressing plate (50) is arranged at the opening of the sidewall of the shaft sleeve, presses the backing plate (40), and is detachably fixedly connected with the backing plate (40); When the injection punch (20) is in normal operation, the pressing sleeve (30) is embedded in the gap between the injection punch (20) and the punch side shaft sleeve; the punch tail flange (21) is arranged between the pressing sleeve (30) and the backing plate (40); the punch pressing plate (50) is arranged at the opening of the sidewall of the shaft sleeve, presses the backing plate (40), and clamps the punch tail flange (21), and is detachably fixedly connected with the backing plate (40); When the injection punch (20) is maintained, the punch tail flange (21) is pushed towards the front end of the punch side shaft sleeve; the pressing sleeve (30) is embedded in the punch side shaft sleeve, and is arranged between the punch tail flange (21) and the backing plate (40).

3. A coupling assembly for a plugger punch according to claim 1 or 2, characterised in that The pressing sleeve (30) is an open ring block, comprising arc-shaped plates (31) on both sides of the opening and limiting connecting plates (32) between the arc-shaped plates (31); When the injection punch (20) is in normal operation, the arc-shaped plates (31) of the pressing sleeve (30) are embedded in the gap between the injection punch (20) and the punch side shaft sleeve, and the limiting connecting plates (32) are detachably fixedly connected with the opening surface (11) of the punch side shaft sleeve; When the injection punch (20) is maintained, the pressing sleeve (30) is embedded in the punch side shaft sleeve and located at the rear end of the punch tail flange (21).

4. A coupling assembly for a plugger as defined in claim 3, wherein The limiting connecting plates (32) are provided with notches (33) to avoid the lubricating oil port of the injection punch (20).

5. A coupling assembly for a plugger according to claim 1 or 2, wherein The coupling connection section of the injection punch is provided with a cooling water connector (22); the sidewall of the punch side shaft sleeve of the coupling (10) is provided with a through hole (12) for the cooling water connector (22) to pass through and move.

6. A method of quickly maintaining a die pusher insert, characterized by, The injection punch adopts the coupling assembly according to any one of claims 1 to 5; The maintenance steps comprise: S1, loosen the injection punch (20) in the punch side shaft sleeve of the coupling (10), and take out the pressing sleeve (30); S2, the injection punch (20) is advanced to the punch side shaft sleeve front side limiting step of the coupling (10); S3, the pressure sleeve (30) is re-placed into the rear end of the punch tail flange (21), and the injection punch (20) is fixed; at this time, the head of the injection punch (20) is exposed from the mold; S4, personnel carry out maintenance of the head vulnerable parts of the injection punch (20); S5, after the maintenance is completed, the injection punch (20) is loosened, and the pressure sleeve (30) is taken out; S6, the injection punch (20) is pushed to the rear side limiting step of the punch side shaft sleeve of the coupling (10); S7, the pressure sleeve (30) is re-placed into the front end of the punch tail flange (21), and the injection punch (20) is fixed.

7. A method of quickly servicing a die plunger wear part as defined in claim 6, wherein, The head vulnerable parts of the injection punch (20) are copper rings (23).

8. A method of quickly servicing a die plunger wear part as defined in claim 7, wherein, The copper rings (23) are two coaxial copper rings.

Images