Lining jig for shell machining

Abstract

The utility model discloses a shell machining lining jig, and belongs to the technical field of shell machining. A shell machining lining jig comprises a bottom plate and further comprises a profiling block detachably arranged on the bottom plate, a gap is reserved between the outer wall of the profiling block and an inner cavity of a shell, the outer wall of the profiling block is sleeved with a bag body, the profiling block is provided with a locking piece used for tightening the opening portion of the bag body, and a pipeline used for filling the bag body with media is formed in the profiling block. A plurality of groups of clamping pieces for clamping the shell are arranged on the bottom plate; the profiling block is fixedly arranged on the bottom plate, the gap is reserved between the outer wall of the profiling block and the inner wall of the shell, the matching precision of the profiling block and the inner cavity of the shell can be reduced, the machining precision of the profiling block can be reduced, the bag body is arranged on the outer wall of the profiling block in a sleeved mode, high-pressure media can be filled into the bag body before machining, and machining precision is improved. And the capsule body is expanded to support the interior of the shell, the phenomenon that the shell deforms during machining is reduced, and the using effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of shell processing technology, and in particular to a shell machining inner lining fixture. Background Technology

[0002] For shells with internal cavities, especially thin-walled shells, when machining their outer surfaces, in order to reduce the deformation of the shell during machining and counteract the cutting forces generated during machining, an inner lining fixture (or a contouring fixture) is usually used to support the shell from the inside to ensure the machining accuracy of the shell.

[0003] Shells with cavities often have curved surfaces and complex structures, so they are generally manufactured by casting. When using an inner lining fixture to support the shell from the inside, the inner part of the shell is a blank with a large range of dimensions, which makes it difficult to match the inner lining fixture with the inner wall of the shell. This makes the inner lining fixture difficult to process and unable to meet production requirements. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the inner lining fixture in the prior art is difficult to match with the inner wall of the shell, making it inconvenient to process, and proposes a shell machining inner lining fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A machining fixture for a shell includes a base plate and a contour block detachably mounted on the base plate. A gap is left between the outer wall of the contour block and the inner cavity of the shell. A bladder is fitted on the outer wall of the contour block. A locking member for tightening the opening of the bladder is provided on the contour block. A channel for filling the bladder with a medium is opened inside the contour block. Multiple sets of clamping members for clamping the shell are provided on the base plate.

[0007] To facilitate fixing the capsule to the contour block, preferably, the contour block has a fixing groove on its side wall, and the capsule has a fixing end fixedly installed at its bottom. Both the locking element and the fixing end are located in the fixing groove.

[0008] In order to improve the fit between the fixed end and the fixed groove, the fixed end is further convex and extends into the fixed groove, and the free end of the fixed end extends out from the fixed groove.

[0009] To facilitate the fixation of the bladder, the locking element is a stainless steel cable tie, which is sleeved on the outer wall of the fixing end, and the inner and outer walls of the fixing end are respectively in contact with the fixing groove and the stainless steel cable tie.

[0010] Preferably, the base plate has a channel, the bottom of the contour block has a groove, one end of the pipe is connected to the groove, and one end of the channel is connected to the groove. A sealing ring is provided in the groove, and the sealing ring abuts against the top of the base plate.

[0011] Preferably, the base plate is provided with a plurality of support seats for supporting the housing, the bottom of the support seat is fixedly provided with a screw, the base plate is provided with a threaded hole, the screw is threadedly connected to the threaded hole, and the clamping end of the clamping member is located above the support seat.

[0012] Preferably, the base plate is provided with at least two positioning pins for positioning the housing, the base plate is provided with positioning holes, and a positioning rod is fixedly provided at the bottom of the positioning pin, the positioning rod being interference-fitted with the positioning hole.

[0013] Preferably, the capsule material is polyurethane.

[0014] Compared with the prior art, this utility model provides a machining fixture for the inner lining of a shell, which has the following beneficial effects:

[0015] 1. The machining fixture for the housing has a contour block fixedly set on the base plate. The outer wall of the contour block and the inner wall of the housing are left with a gap, which can reduce the matching accuracy between the contour block and the inner cavity of the housing, thereby reducing the machining accuracy of the contour block. In addition, a bladder is fitted on the outer wall of the contour block. Before machining, a high-pressure medium can be filled into the bladder to expand and support the inside of the housing, reducing the deformation of the housing during machining and improving the performance.

[0016] 2. The inner lining fixture of the shell is machined. By fitting the bladder onto the contour block and positioning the fixed end in the fixed groove, the stainless steel cable tie is placed on the outer wall of the fixed end and tightened to fix the bladder onto the contour block, thus improving the performance.

[0017] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model has a contour block fixedly set on the base plate, with a gap between the outer wall of the contour block and the inner wall of the shell, which can reduce the matching accuracy between the contour block and the inner cavity of the shell, thereby reducing the machining accuracy of the contour block. In addition, a bladder is fitted on the outer wall of the contour block. Before processing, a high-pressure medium can be filled into the bladder to expand and support the inside of the shell, reducing the deformation of the shell during machining and improving the performance. Attached Figure Description

[0018] Figure 1 This utility model provides a structural schematic diagram of a machining fixture for the inner lining of a shell. Figure 1 ;

[0019] Figure 2This utility model provides a structural schematic diagram of a machining fixture for the inner lining of a shell. Figure 2 ;

[0020] Figure 3 This utility model provides a structural schematic diagram of a machining fixture for the inner lining of a shell. Figure 3 ;

[0021] Figure 4 This utility model proposes a machining fixture for the inner lining of a shell. Figure 3 Enlarged view of section A;

[0022] Figure 5 This is a schematic diagram of the structure of a shell machining inner lining fixture body proposed in this utility model.

[0023] In the figure: 1. Base plate; 101. First fixing hole; 102. Second fixing hole; 103. Channel; 2. Contouring block; 201. Fixing groove; 202. Pipe; 203. Sinking groove; 3. Bag body; 301. Fixing end; 4. Locking component; 5. Clamping component; 6. Support base; 7. Positioning pin. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example:

[0027] Reference Figures 1-5A machining fixture for a housing liner includes a base plate 1 with multiple first fixing holes 101, ranging from two to eight, preferably four. These holes facilitate fixing the base plate 1 to the machining equipment using bolts, improving performance. The fixture also includes a detachable contour block 2 mounted on the base plate 1. The contour block 2 has at least two connecting holes at its bottom, preferably four. Second fixing holes 102 corresponding to the connecting holes are provided on the base plate 1. During use, bolts are threaded through the second fixing holes 102 and connected to the connecting holes. Next, the contour block 2 is fixed to the base plate 1. At this point, a gap is left between the outer wall of the contour block 2 and the inner cavity of the shell. This gap reduces the matching precision between the contour block 2 and the inner cavity of the shell, thereby reducing the machining precision of the contour block 2 and improving its performance. A bladder 3 is fitted onto the outer wall of the contour block 2. The bladder 3 is made of polyurethane, silicone rubber, or fluororubber. Here, we prefer polyurethane, as it has excellent elasticity and wear resistance, ensuring the bladder 3's resilience and service life. Furthermore, before machining the shell, any protruding burrs on the inner wall of the shell can be removed, reducing the risk of the bladder 3 being scratched. This reduces risks, increases the service life of the capsule 3, and also has excellent chemical resistance, resisting harsh environmental conditions such as immersion in cutting fluid. A locking element 4 is provided on the contour block 2 to secure the opening of the capsule 3. The capsule 3 is open at one end. In use, the capsule 3 is placed on top of the contour block 2 and extends downwards. Then, the locking element 4 is used to fix the opening of the capsule 3 to the side wall of the contour block 2. Furthermore, a pipe 202 is provided inside the contour block 2 for filling the capsule 3 with a medium, which can be high-pressure gas or hydraulic oil. Here, we prefer hydraulic oil supplied by a hydraulic station. Multiple sets of clamping elements 5 are provided on the base plate 1 for clamping the shell. The clamping element 5 is provided in two to ten sets, preferably six sets, located around the perimeter of the housing. During processing, it can clamp and fix the housing to prevent movement. The clamping element 5 can be a pneumatic cylinder, a hydraulic cylinder, or a manual quick clamp. Here, we prefer a lever hydraulic cylinder. In use, the housing is placed on the base plate 1, and then the clamping element 5 is activated to clamp the housing. Then, a medium of a certain pressure is injected into the bladder 3 through the pipe 202 and the pressure is maintained so that the outer wall of the bladder 3 fits against the inner wall of the housing cavity. Under the pressure inside the bladder 3, the housing is effectively supported from the inner wall of the housing, reducing the deformation of the housing during machining and improving the performance.

[0028] In use, by fixing a contour block 2 on the base plate 1, and leaving a gap between the outer wall of the contour block 2 and the inner wall of the shell, the matching accuracy between the contour block 2 and the inner cavity of the shell can be reduced, thereby reducing the machining accuracy of the contour block 2. Moreover, a bladder 3 is fitted on the outer wall of the contour block 2. Before machining, a high-pressure medium can be filled into the bladder 3 to expand and support the inside of the shell, reducing the deformation of the shell during machining and improving the performance.

[0029] Reference Figure 4 and Figure 5 A fixing groove 201 is provided on the side wall of the contour block 2, and a fixing end 301 is fixedly provided at the bottom of the bladder body 3. The locking member 4 and the fixing end 301 are both located in the fixing groove 201. By providing a fixing groove 201 on the contour block 2 and fixing the fixing end 301 at the bottom of the bladder body 3, it is convenient to fix the bladder body 3. Moreover, the fixing end 301 is convex and protrudes into the inner wall of the bladder body 3. At this time, the convex shape extends into the fixing groove 201, and the free end of the fixing end 301 extends out from the fixing groove 201. That is to say, the fixing end 301 presents a curved structure that matches the fixing groove 201. When the locking member 4 is used to fix the fixing end 301 in the fixing groove 201, the problem of the fixing end 301 slipping out of the fixing groove 201 when the bladder body 3 expands, causing the bladder body 3 to fall off, can be reduced, thus improving the use effect.

[0030] Reference Figure 5 The locking element 4 can be used to bind the bag body 3 to the contour block 2 using plastic cable ties or ropes. Here, based on actual usage, the locking element 4 is preferably a stainless steel cable tie. The stainless steel cable tie is sleeved on the outer wall of the fixed end 301, and the inner and outer walls of the fixed end 301 are respectively in contact with the fixing groove 201 and the stainless steel cable tie. In use, by sleeved the bag body 3 on the contour block 2, the fixed end 301 is located in the fixing groove 201. At this time, the stainless steel cable tie is sleeved on the outer wall of the fixed end 301 and tightened, which can fix the bag body 3 on the contour block 2 and improve the usage effect.

[0031] Reference Figures 1-3A channel 103 is provided on the base plate 1, and a groove 203 is provided at the bottom of the contour block 2. One end of the pipe 202 is connected to the groove 203, and the other end of the pipe 202 is connected to the inside of the bladder 3. One end of the channel 103 is also connected to the groove 203. A sealing ring is provided in the groove 203. The sealing ring abuts against the top of the base plate 1, which can improve the sealing effect and reduce leakage. In use, the output end of the hydraulic station is connected to the channel 103, and hydraulic oil of a certain pressure is supplied into the channel 103. The hydraulic oil enters the channel 103, passes through the pipe 202, and enters the bladder 3, causing the bladder 3 to expand and fit against the inner wall of the shell. After use, under the elastic effect of the bladder 3 and the action of the hydraulic station, the hydraulic oil filled into the bladder 3 can be withdrawn. The bladder 3 loses its supporting effect on the inner wall of the shell. At this time, the clamping part 5 can be released and the shell can be removed from the contour block 2.

[0032] Reference Figure 1 and Figure 3 Multiple support seats 6 for supporting the shell are provided on the base plate 1. There are two to ten support seats 6, and six are preferred here. The large end face of the shell is a precision machined surface. The top end faces of the six support seats 6 are located in the same plane, which can provide good support for the shell. A screw is fixedly installed at the bottom of the support seat 6. A threaded hole is opened on the base plate 1, and the screw is threadedly connected to the threaded hole. The clamping end of the clamping member 5 is located above the support seat 6. In use, by opening a threaded hole on the base plate 1 and fixing the screw on the support seat 6, it is easy to install the support seat 6 on the base plate 1 to support the shell.

[0033] Reference Figure 1 At least two positioning pins 7 are provided on the base plate 1. The housing has through holes, and two precision-machined holes are selected as the reference holes of the housing to match the positioning pins 7. Here, we prefer two holes for positioning the housing. Positioning holes are provided on the base plate 1, and positioning rods are fixedly provided at the bottom of the positioning pins 7. The positioning rods are interference-fitted with the positioning holes. In use, by providing positioning pins 7 on the base plate 1, the reference holes on the housing are respectively fitted onto the corresponding positioning pins 7, and then the large end face of the housing abuts against the top of the support base 6, which can realize the positioning and support of the housing and improve the use effect.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A housing machining inner liner jig comprising a base plate (1), characterized in that, Also comprise dismounting setting on the bottom plate (1) profiled block (2), the profiled block (2) outer wall and the gap between the cavity of the shell, the profiled block (2) outer wall is equipped with the capsule (3), the profiled block (2) is provided with the locking piece (4) for tightening the mouth of the capsule (3), and the profiled block (2) is provided with the pipeline (202) for filling medium for the capsule (3), the bottom plate (1) is provided with a plurality of clamping pieces (5) for clamping the shell.

2. A housing machining inner liner jig according to claim 1, characterized by, The profiled block (2) side wall is provided with a fixing groove (201), and the capsule (3) bottom is fixedly provided with a fixed end (301), and the locking piece (4) and the fixed end (301) are located in the fixing groove (201).

3. A housing machining inner liner jig according to claim 2, characterized by, The fixed end (301) is in a convex shape, which extends into the fixing groove (201), and the free end of the fixed end (301) extends out of the fixing groove (201).

4. The housing machining inner liner jig of claim 2, wherein, The locking piece (4) is a stainless steel band, which is sleeved on the outer wall of the fixed end (301), and the inner wall and the outer wall of the fixed end (301) are respectively matched with the fixing groove (201) and the stainless steel band.

5. The housing machining liner jig of claim 1, wherein, The bottom plate (1) is provided with a channel (103), and the profiled block (2) bottom is provided with a sink (203), one end of the pipeline (202) is communicated with the sink (203), and one end of the channel (103) is communicated with the sink (203), the sink (203) is provided with a sealing ring, and the sealing ring is abutted with the top of the bottom plate (1).

6. A housing machining inner liner jig according to claim 1, wherein, The bottom plate (1) is provided with a plurality of support seats (6) for supporting the shell, the support seat (6) bottom is fixedly provided with a screw rod, the bottom plate (1) is provided with a threaded hole, the screw rod is threadedly connected with the threaded hole, and the clamping end of the clamping piece (5) is located above the support seat (6).

7. A housing machining inner liner jig according to claim 1, wherein, The bottom plate (1) is provided with at least two positioning pins (7) for positioning the shell, and the bottom plate (1) is provided with a positioning hole, the positioning pin (7) bottom is fixedly provided with a positioning rod, and the positioning rod is connected with the positioning hole in interference.

8. The housing machining liner jig of claim 1, wherein, The material of the capsule (3) is polyurethane.

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