Embedded ejection device for numerical control electro-hydraulic hammer

Abstract

The utility model discloses an embedded ejection device for a numerical control electro-hydraulic hammer, which solves the technical problems that the ejection device of the numerical control electro-hydraulic hammer in the prior art is difficult to maintain, the service life of parts is too short, the maintenance is frequent, the daily maintenance workload is larger, and the use cost is higher. The embedded ejection device comprises a die holder with a positioning groove, the cylinder sleeve is in interference fit with the guide sleeve and is arranged in the die holder; the piston rod penetrates through the cylinder sleeve and the guide sleeve; the separated clamping block is installed in the positioning groove and fixed through the positioning ring and the positioning clamping spring. Preferably, a transition block is adopted and is arranged above the separated clamping block; the piston rod is provided with two seals. According to the lower ejection device, rapid assembly and disassembly are achieved through the design of the separated clamping block, the service life of the piston rod is prolonged through the design of the transition block and two sealing modes, the reliability of the lower ejection device of the whole numerical control electro-hydraulic hammer is achieved, and the large-batch production condition of the numerical control electro-hydraulic hammer in the closed forging process is met.

Description

Technical Field

[0001] The utility model relates to a numerically controlled electro-hydraulic hammer, in particular to an embedded ejection device for the numerically controlled electro-hydraulic hammer. Background Art

[0002] CNC electro-hydraulic hammer, full name CNC full hydraulic die forging hammer, is a new type of energy-saving and environmentally friendly forging equipment. With the development of technology and the increase in demand, CNC electro-hydraulic hammer meets the demand for lightweight and precision forgings, and has been widely used in major industries such as automobiles, engineering machinery, and aerospace. With the development of digital equipment in the forging industry and the development of closed forging technology, the conditions for using CNC electro-hydraulic hammers for large-scale closed forging production have become increasingly mature. One of the basic conditions for closed forging technology is that the lower ejector device of the forging equipment must be reliable.

[0003] In the prior art, the ejector device is usually designed as a through-type hydraulic cylinder structure. When repairing, even if only one component is replaced, the staff must first disassemble the entire mold base to remove the bottom hydraulic cylinder. This makes the maintenance of CNC electro-hydraulic hammers more difficult, less efficient, and more labor-intensive.

[0004] At the same time, the working environment of CNC electric hydraulic hammer is relatively harsh. The production process is often accompanied by high temperature and vibration, and a large amount of sludge and dust pollution will be generated. In the existing technology, the guide sleeve of the piston rod is limited by the guide ring design and can only be set with two seals. It is easy for impurities to penetrate under harsh working conditions, thus affecting the life of the lower parts. In addition, the production of each forging requires cooling and demolding, and the demolding agent used in this link is corrosive, which will also affect the service life of the lower parts.

[0005] Therefore, the service life of the components of the existing CNC electro-hydraulic hammer ejection device is relatively short, and they need to be repaired and replaced within about one month of production. The frequent repairs increase the workload of daily maintenance of the CNC electro-hydraulic hammer, and thus the promotion of the CNC electro-hydraulic hammer in the closed forging process will generate a large workload of daily maintenance, which in turn leads to a high cost of use. Utility Model Content

[0006] The utility model aims to solve the technical problems in the prior art that the ejection device of a CNC electro-hydraulic hammer is difficult to repair, the life of parts is too short resulting in frequent repairs, and the daily maintenance workload is large, which in turn leads to high use costs, and to provide an embedded ejection device for a CNC electro-hydraulic hammer.

[0007] In order to achieve the above purpose, the technical solutions provided by the utility model are as follows:

[0008] An embedded ejection device for a numerically controlled electro-hydraulic hammer comprises a die base, a cylinder sleeve, a piston rod and a guide sleeve, and its special features are:

[0009] It also includes a separate card block and a positioning clip;

[0010] The cylinder sleeve is embedded in the cavity of the mold base, and a lifting threaded hole is provided on the top for quick installation and removal of the ejection device;

[0011] The guide sleeve is interference fitted in the upper part of the cylinder sleeve;

[0012] The rod part of the piston rod is arranged in the guide sleeve, and the head part thereof is matched with the cylinder sleeve, and the tops of the cylinder sleeve, the piston rod and the guide sleeve are flush;

[0013] The inner wall of the cavity of the mold base is provided with a block positioning groove located above the cylinder sleeve, and the separate block is arranged in the block positioning groove, and the lower part thereof abuts against the top of the cylinder sleeve and the guide sleeve;

[0014] The split card block is composed of a plurality of independent card blocks that can be taken out from above the cavity of the mold base;

[0015] A through hole through which the piston rod can pass is provided in the middle of the separate card block, and a retaining spring positioning groove is provided on the inner wall of the through hole. The retaining spring positioning groove is composed of positioning grooves respectively arranged on the inner wall of each independent card block and corresponding to each other. A positioning retaining spring is installed in the retaining spring positioning groove, which is used to fix the independent card block in the card block positioning groove in a combined manner.

[0016] Furthermore, the inner hole of the separate clamping block is a stepped hole, the small diameter end of which can pass the piston rod, and the inner wall of the large diameter end is provided with a retaining spring positioning groove;

[0017] A positioning ring is arranged between the positioning clamp spring and the step of the step hole, and the independent clamping block is fixed in the clamping block positioning groove in a combined manner through the positioning clamp spring and the positioning ring.

[0018] Furthermore, it also includes a transition block arranged above the separate clamping block, the outer wall of the transition block is stepped, the outer diameter of its large diameter section is adapted to the cavity diameter of the mold base, and the lower end of the small diameter section abuts the top of the piston rod to prevent the piston rod from being directly exposed to the outside, thereby isolating and protecting the piston rod; a lifting threaded hole is provided on the top of the transition block for quickly installing and disassembling the ejection device.

[0019] Furthermore, the guide sleeve is made of copper, taking advantage of the high hardness and low friction characteristics of the material itself, and discarding the guide ring in the original design, saving space for the guide sleeve for sealing, while ensuring movement accuracy;

[0020] The inner side wall of the guide sleeve is provided with a plurality of sealing grooves, and annular sealing members are installed in each of the plurality of sealing grooves for sealing between the guide sleeve and the piston rod.

[0021] Further, the inner side wall of the guide sleeve is provided with five sealing grooves from top to bottom, and the five sealing grooves are: a guide sleeve dustproof groove, a No. 1 guide sleeve sealing groove, a No. 2 guide sleeve sealing groove, a No. 2 guide sleeve sealing groove, and a No. 1 guide sleeve sealing groove;

[0022] The annular seal installed in the dustproof groove of the guide sleeve is a dustproof ring, the annular seal installed in the No. 1 guide sleeve sealing groove is a Y-type sealing ring, and the annular seal installed in the No. 2 guide sleeve sealing groove is a PTFE sealing ring for the shaft.

[0023] Furthermore, the separate card block is in the shape of a circular ring as a whole, and its edge is chamfered;

[0024] The independent card blocks constituting the detachable card block include two limit card blocks, the two side surfaces of the limit card blocks are parallel to each other, and the dividing surface is parallel to the two side surfaces. The detachable card block can be removed as a whole by sliding in and out of the parallel side surfaces of the two limit card blocks.

[0025] Furthermore, a transition block sealing groove is provided on the outer wall of the transition block, and a sealing ring is installed in the transition block sealing groove; the edge of the transition block is chamfered to prevent the transition block from deformation, burrs, and surface roughness due to long-term use, thereby increasing its service life.

[0026] Furthermore, the head of the piston rod is provided with a piston rod sealing groove and two piston rod guide grooves. The two piston rod guide grooves are respectively arranged near the two ends of the head of the piston rod. The piston rod sealing groove is arranged between the two piston rod guide grooves. A sealing ring is installed in the piston rod sealing groove, and guide rings are installed in the two piston rod guide grooves.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] 1. The embedded ejector device for a CNC electro-hydraulic hammer provided by the utility model uses a separate card block structure to realize the loading, unloading, replacement and maintenance of the entire ejector device directly from the top of the mold base, avoiding the inconvenience of disassembling the entire mold base in the original design, reducing the workload of repairing the CNC electro-hydraulic hammer ejector device, and improving the maintenance efficiency by at least 3 times.

[0029] 2. The embedded ejector device for a CNC electro-hydraulic hammer provided by the utility model uses a transition block structure to isolate the harsh working conditions from the ejector device and seal the internal components, thereby preventing the hard oxide scale, oil sludge, dust and other impurities generated when the CNC electro-hydraulic hammer is working from directly contacting the piston rod or penetrating into the piston structure, thereby improving the life of the various components of the ejector device.

[0030] 3. The utility model provides an embedded ejection device for a CNC electro-hydraulic hammer, which uses a copper guide sleeve and abandons the original guide ring component to save the sleeve space, effectively reducing the piston sealing pressure and increasing the service life of the piston rod.

[0031] 4. The embedded ejection device for a CNC electro-hydraulic hammer provided by the utility model adopts two different guide sleeve sealing schemes and arranges five seals, thereby enhancing the sealing performance of the piston structure and increasing the service life of the piston rod.

[0032] 5. The embedded ejector device for CNC electro-hydraulic hammer provided by the utility model increases the service life of parts and components, realizes the reliability of the lower ejector device of the entire CNC electro-hydraulic hammer, and meets the mass production conditions of the closed forging process on the CNC electro-hydraulic hammer. After actual product production inspection, the utility model effectively achieves the above purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of an embodiment of an embedded ejection device for a numerically controlled electro-hydraulic hammer of the utility model;

[0034] Figure 2 This is a schematic diagram of the structure of a separate card block in an embodiment of the utility model;

[0035] Figure 3 This is an AA cross-sectional view of a separate card block in an embodiment of the utility model;

[0036] Figure 4 It is a half-section structural schematic diagram of the cylinder sleeve, piston rod and guide sleeve in the embodiment of the utility model;

[0037] Figure 5 It is a structural schematic diagram of a transition block in an embodiment of the utility model;

[0038] Figure 6 yes Figure 5 Top view of the .

[0039] The numbers in the attached figures are explained as follows: 1-die base, 101-block positioning groove; 2-cylinder sleeve, 201-cylinder upper chamber, 202 cylinder lower chamber; 3-piston rod, 301-piston rod sealing groove, 302-piston rod guide groove; 4-guide sleeve, 401-guide sleeve sealing groove No. 1, 402-guide sleeve sealing groove No. 2, 403-guide sleeve dustproof groove; 5-separate block, 501-limiting block, 502-supporting block; 6-positioning ring; 7-positioning retaining spring, 701-retaining spring positioning groove; 8-transition block, 801-transition block sealing groove; 9-lifting threaded hole. DETAILED DESCRIPTION

[0040] The specific technical scheme in the embodiment of the present utility model will be further described below in conjunction with the accompanying drawings in an embodiment of the present utility model.

[0041] Figure 1 A schematic diagram of the structure of an embedded ejection device for a CNC electro-hydraulic hammer provided by an embodiment of the utility model is shown in FIG. Figure 1 As shown, the embedded ejection device of the CNC electro-hydraulic hammer includes a die base 1, a cylinder sleeve 2, a piston rod 3, a guide sleeve 4, a separate clamping block 5, a positioning ring 6, a positioning clamping spring 7 and a transition block 8;

[0042] The cylinder sleeve 2 is embedded in the cavity of the die base 1, and a lifting threaded hole 9 is provided on the top of the cylinder sleeve 2; the guide sleeve 4 is interference fitted in the upper part of the cylinder sleeve 2; the rod part of the piston rod 3 is arranged in the guide sleeve 4, and its head cooperates with the cylinder sleeve 2, and the tops of the cylinder sleeve 2, the piston rod 3 and the guide sleeve 4 are flush; the inner wall of the cavity of the die base 1 is provided with a block positioning groove 101 located above the cylinder sleeve 2, and the separate block 5 is arranged in the block positioning groove 101, and its lower part abuts against the top of the cylinder sleeve 2 and the guide sleeve 4; the separate block 5 is composed of a plurality of independent blocks that can be taken out from the top of the cavity of the die base 1; a through hole is provided in the middle part of the separate block 5 through which the piston rod 3 can pass, and a retaining spring positioning groove 701 is provided on the inner wall of the through hole, and the retaining spring positioning groove 701 is composed of positioning grooves respectively arranged on the inner side walls of each independent block and corresponding to each other, and the retaining spring positioning groove 701 is connected. A positioning spring 7 is installed in the spring positioning groove 701; the inner hole of the separate clamping block 5 is a stepped hole, the small diameter end of which can pass the piston rod 3, and the inner wall of the large diameter end is provided with a spring positioning groove 701; a positioning ring 6 is provided between the positioning spring 7 and the step of the step hole, and the independent clamping block is fixed in the clamping block positioning groove 101 in a combined manner by the positioning spring 7 and the positioning ring 6; the transition block 8 is arranged above the separate clamping block 5, and the outer wall of the transition block 8 is stepped, the outer diameter of the large diameter section is adapted to the cavity diameter of the mold base 1, and the lower end of the small diameter section abuts the top of the piston rod 3 to isolate and protect the piston rod 3; a lifting threaded hole 9 is provided on the top of the transition block 8, and a transition block sealing groove 801 is provided on the outer wall of the transition block 8, and a sealing ring is installed in the transition block sealing groove 801; the edge of the transition block 8 is chamfered.

[0043] In the embedded ejection device of the CNC electro-hydraulic hammer, the guide sleeve 4 is made of copper; the inner wall of the guide sleeve 4 is provided with five sealing grooves from top to bottom, and the five sealing grooves are: a guide sleeve dustproof groove 403, a No. 1 guide sleeve sealing groove 401, a No. 2 guide sleeve sealing groove 402, a No. 2 guide sleeve sealing groove 402, and a No. 1 guide sleeve sealing groove 401; the annular seal installed in the guide sleeve dustproof groove 403 is a dustproof ring, the annular seal installed in the No. 1 guide sleeve sealing groove 401 is a Y-shaped sealing ring, and the annular seal installed in the No. 2 guide sleeve sealing groove 402 is a PTFE sealing ring for the shaft.

[0044] In the embedded ejection device of the CNC electro-hydraulic hammer, the separate block 5 is in a circular ring shape as a whole, and its edges are chamfered; the independent blocks constituting the separate block 5 include two limit blocks 501, and the two side surfaces of the limit block 501 are parallel to each other, and the split surface is parallel to the two side surfaces.

[0045] In the embedded ejection device of the CNC electro-hydraulic hammer, a piston rod sealing groove 301 and two piston rod guide grooves 302 are provided at the head of the piston rod 3. The two piston rod guide grooves 302 are respectively arranged at the two ends of the head of the piston rod 3. The piston rod sealing groove 301 is arranged between the two piston rod guide grooves 302. A sealing ring is installed in the piston rod sealing groove 301. Guide rings are installed in the two piston rod guide grooves 302, and polytetrafluoroethylene guide rings are preferably used for holes.

[0046] The working process of the ejector device is as follows:

[0047] When the ejection device control valve receives the ejection command, the high-pressure oil of the hydraulic system enters the lower chamber 202 of the ejection piston, pushing the piston rod 3 to eject, and the piston rod 3 pushes the transition block 8 upward. At this time, the separate clamping block 5 limits the cylinder sleeve 2 and the guide sleeve 4, and the positioning ring 6 and the positioning clamping spring 7 limit the separate clamping block 5; the forging is ejected from the die cavity, and at the same time, this process also presses the hydraulic oil in the upper chamber 201 of the cylinder into the hydraulic system tank;

[0048] When the ejection device control valve receives a downward command, the high-pressure oil of the hydraulic system enters the upper cylinder chamber 201 of the ejection piston, pushing the piston rod 3 downward, the piston rod 3 returns, the transition block 8 returns, and at the same time, this process also presses the hydraulic oil in the lower cylinder chamber 202 into the hydraulic system tank.

[0049] The disassembly process of the ejector device is as follows:

[0050] 1 Install a lifting ring in the lifting threaded hole 9 of the transition block 8, and lift the transition block 8 out of the cavity of the mold base 1 to expose the components below;

[0051] 2. Use circlip pliers to remove the positioning circlip 7, take out the circlip 7, and then take out the positioning ring 6;

[0052] 3. Pull out the limit blocks 501 on both sides, then take out the remaining support blocks 502 one by one, and take out the separate block 5 as a whole;

[0053] 4. Install a lifting ring in the lifting threaded hole 9 of the cylinder sleeve 2, lift out the assembly including the cylinder sleeve 2, the guide sleeve 4 and the piston rod 3, and after lifting out, use a copper rod to knock the piston rod 3 to separate the piston rod 3 from the cylinder sleeve assembly;

[0054] 5. Check the sealing of all seals and the condition of the parts. Disassembly is complete.

[0055] The installation process of the ejector device is as follows:

[0056] 1. Install or replace the PTFE seal ring and guide ring for the hole in the seal groove of the piston rod 3;

[0057] 2. Install or replace one set of dustproof ring, two sets of PTFE sealing rings for shaft and two sets of Y-type sealing rings in the five sealing grooves on the inner side of the guide sleeve 4;

[0058] 3. Put the piston rod 3 into the guide sleeve 4, so that the piston rod 3, the guide sleeve 4 and the cylinder sleeve 2 form an assembly;

[0059] 4. Insert the cylinder sleeve assembly into the central cavity of the die base 1, so that the upper plane of the piston rod 3 is flush with the lower plane of the block positioning groove 101 in the cavity of the die base 1;

[0060] 5. Prepare the separate card block 5 in order, install the supporting card block 502 into the card block groove of the mold base in turn, and then push the limiting card block 501 into the entire ring, and then install the positioning ring 6 and the positioning spring 7 inside the separate card block 5 to limit it;

[0061] 6. Install transition block 8 to isolate and seal the components below. Installation is complete.

[0062] The above description is only an embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any equivalent structural transformation made using the contents of the present utility model specification and drawings, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. An embedded ejection device for a CNC electro-hydraulic hammer, comprising a die base (1), a cylinder sleeve (2), a piston rod (3), and a guide sleeve (4), characterized in that: It also includes a separate clamping block (5) and a positioning clamping spring (7); The cylinder sleeve (2) is embedded in the cavity of the mold base (1), and a lifting threaded hole (9) is provided on the top of the cylinder sleeve; The guide sleeve (4) is interference fitted in the upper part of the cylinder sleeve (2); The rod portion of the piston rod (3) is arranged in the guide sleeve (4), and the head portion thereof cooperates with the cylinder sleeve (2), and the tops of the cylinder sleeve (2), the piston rod (3) and the guide sleeve (4) are flush; The inner wall of the cavity of the mold base (1) is provided with a block positioning groove (101) located above the cylinder sleeve (2); the separate block (5) is arranged in the block positioning groove (101), and its lower part abuts against the top of the cylinder sleeve (2) and the guide sleeve (4); The separable card block (5) is composed of a plurality of independent card blocks that can be taken out from above the cavity of the mold base (1); A through hole through which the piston rod (3) can pass is provided in the middle of the separate clamping block (5), and a retaining spring positioning groove (701) is provided on the inner wall of the through hole. The retaining spring positioning groove (701) is composed of positioning grooves respectively provided on the inner side wall of each independent clamping block and corresponding to each other. The retaining spring (7) is installed in the retaining spring positioning groove (701) for fixing the independent clamping block in the clamping block positioning groove (101) in a combined manner.

2. The embedded ejection device for a CNC electro-hydraulic hammer according to claim 1, characterized in that: The inner hole of the detachable clamping block (5) is a stepped hole, the small-diameter end of which can pass the piston rod (3), and the inner wall of the large-diameter end is provided with a retaining spring positioning groove (701); A positioning ring (6) is provided between the positioning clamp spring (7) and the step of the step hole, and the independent clamping block is fixed in the clamping block positioning groove (101) in a combined manner by the positioning clamp spring (7) and the positioning ring (6).

3. The embedded ejection device for a CNC electro-hydraulic hammer according to claim 1, characterized in that: It also includes a transition block (8) arranged above the separate clamping block (5), the outer wall of the transition block (8) is stepped, the outer diameter of the large diameter section thereof is adapted to the cavity diameter of the die base (1), and the lower end of the small diameter section abuts against the top of the piston rod (3), thereby isolating and protecting the piston rod (3); A lifting threaded hole (9) is provided on the top of the transition block (8).

4. An embedded ejection device for a CNC electro-hydraulic hammer according to any one of claims 1 to 3, characterized in that: The guide sleeve (4) is made of copper; The inner side wall of the guide sleeve (4) is provided with a plurality of sealing grooves, and annular sealing members are installed in each of the plurality of sealing grooves for sealing between the guide sleeve (4) and the piston rod (3).

5. The embedded ejection device for a CNC electro-hydraulic hammer according to claim 4, characterized in that: The inner side wall of the guide sleeve (4) is provided with five sealing grooves from top to bottom, the five sealing grooves are: a guide sleeve dustproof groove (403), a No. 1 guide sleeve sealing groove (401), a No. 2 guide sleeve sealing groove (402), a No. 2 guide sleeve sealing groove (402), and a No. 1 guide sleeve sealing groove (401); The annular seal installed in the guide sleeve dustproof groove (403) is a dustproof ring, the annular seal installed in the No. 1 guide sleeve sealing groove (401) is a Y-shaped sealing ring, and the annular seal installed in the No. 2 guide sleeve sealing groove (402) is a PTFE sealing ring for the shaft.

6. The embedded ejection device for a CNC electro-hydraulic hammer according to claim 4, characterized in that: The separate card block (5) is in the shape of a circular ring as a whole, and its edge is chamfered; The independent card blocks constituting the separable card block (5) include two limit card blocks (501), the two side surfaces of the limit card block (501) are parallel to each other, and the split surface is parallel to the two side surfaces.

7. The embedded ejection device for a CNC electro-hydraulic hammer according to claim 3, characterized in that: The outer wall of the transition block (8) is provided with a transition block sealing groove (801), and a sealing ring is installed in the transition block sealing groove (801); The edge of the transition block (8) is chamfered.

8. The embedded ejection device for a CNC electro-hydraulic hammer according to claim 4, characterized in that: The head of the piston rod (3) is provided with a piston rod sealing groove (301) and two piston rod guide grooves (302); the two piston rod guide grooves (302) are respectively arranged near the two ends of the head of the piston rod (3); the piston rod sealing groove (301) is arranged between the two piston rod guide grooves (302); a sealing ring is installed in the piston rod sealing groove (301); and guide rings are installed in the two piston rod guide grooves (302).

Images