A lost wax investment casting sand shell removal tapping tool

Abstract

The utility model relates to the field of lost wax investment casting technology, especially a kind of lost wax investment casting sand shell removal knocking tool.Its technical scheme includes: handle and knock head, the handle includes handle and connecting rod, the outer ring of handle is equipped with antiskid sleeve, the inner ring between the antiskid sleeve and handle is provided with rubber sleeve, the connecting rod is provided with positioning assembly.The utility model is set up four groups of different shapes of knocking surface on knock head, can adapt to sand shell of different angles and shapes, improves the efficiency and pertinence of knocking, reduces the damage to casting surface, improves the comfort and stability of operator holding by the setting handle setting antiskid sleeve and rubber sleeve of handle outer ring, guarantees the stability of knock head and handle when being in assembly state by the setting positioning assembly, it is convenient for operator to quickly dismount and replace knock head, can select appropriate knock head according to different sand shell conditions, improves the versatility and practicality of tool.

Description

Technical Field

[0001] This utility model relates to the field of lost-wax investment casting technology, and in particular to a hammering tool for removing sand shells in lost-wax investment casting. Background Technology

[0002] Lost-wax investment casting is a commonly used precision casting method. Its process includes steps such as wax pattern making, shell preparation, dewaxing, pouring, cooling, and sand shell removal. Currently, sand shell removal is typically done manually using hammers. However, existing hammering tools have relatively simple head shapes, making them difficult to adapt to sand shells of varying structures and hardness, resulting in low hammering efficiency. Furthermore, due to improper tool design, the hammering process can easily damage the casting surface, affecting casting quality and yield. Therefore, we propose a new hammering tool for sand shell removal in lost-wax investment casting. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a hammering tool for removing sand shells in lost-wax investment casting.

[0004] The technical solution of this utility model: A hammering tool for removing sand shells in lost-wax casting, comprising a handle and a hammering head. The handle includes a grip and a connecting rod. The outer ring of the grip is fitted with an anti-slip sleeve, and a rubber sleeve is provided between the inner ring of the anti-slip sleeve and the grip. A positioning component is provided on the connecting rod. The positioning component includes a collar, and multiple sets of positioning pins are provided on one side of the collar. A guide rod is provided inside the connecting rod, and a return spring is fitted on the outer ring of the guide rod and one side of the collar. The hammering head is installed corresponding to the end of the connecting rod away from the grip, and the hammering head is provided with four sets of hammering surfaces of different shapes.

[0005] Preferably, the grip and the connecting rod are integrally formed, the outer ring of the anti-slip sleeve has multiple sets of grip grooves, the inner cavity of the anti-slip sleeve has a shock-absorbing cavity, and the rubber sleeve is installed correspondingly to the shock-absorbing cavity.

[0006] Preferably, the inner ring of the collar is fitted with the outer ring of the connecting rod, the connecting rod has a limiting groove, the inner wall of the limiting groove is provided with multiple sets of reinforcing ribs, the collar has a limiting inner plate at the middle position, the limiting inner plate is fitted with the inner wall of the limiting groove, the limiting inner plate has multiple sets of strip grooves, and the reinforcing ribs are installed corresponding to the strip grooves.

[0007] Preferably, one end of the positioning pin is installed corresponding to one side of the collar, and the striking head has multiple sets of positioning holes, with the top end of the positioning pin installed corresponding to the positioning holes.

[0008] Preferably, the two ends of the guide rod are installed corresponding to the inner walls of the two ends of the limiting slide groove, a guide hole is provided at the middle position on the limiting inner plate, the outer ring of the guide rod is installed corresponding to the inner wall of the guide hole, one end of the reset spring is installed corresponding to one side of the limiting inner plate, and the other end of the reset spring is installed corresponding to the inner wall of one end of the limiting slide groove.

[0009] Preferably, the striking head has a threaded hole at the middle position, and one end of the connecting rod has an external thread on its outer ring. The threaded hole is installed corresponding to the end of the connecting rod with the external thread.

[0010] Preferably, the striking head is arranged in a "+" shape, and the four sets of striking surfaces with different shapes on the striking head are a flat striking surface, an arc striking surface, a conical striking surface, and a breaking striking surface.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] This utility model has a simple overall structure. The four sets of different shaped striking surfaces on the striking head can adapt to sand shells of different angles and shapes, improving striking efficiency and targeting, and reducing damage to the surface of the casting. The anti-slip sleeve and rubber sleeve on the outer ring of the handle improve the operator's grip comfort and stability, reduce fatigue, and facilitate long-term operation. The positioning component ensures the stability of the striking head when it is assembled with the handle, allowing the operator to quickly disassemble and replace the striking head. The appropriate striking head can be selected according to different sand shell conditions, improving the tool's versatility and practicality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0015] Figure 3 This is a cross-sectional view of the present invention;

[0016] Figure 4 This is an exploded view of the structure of this utility model.

[0017] Reference numerals: 1. Handle; 11. Grip; 111. Anti-slip sleeve; 112. Rubber sleeve; 113. Grip groove; 12. Connecting rod; 2. Striking head; 21. Threaded hole; 3. Positioning assembly; 31. Collar; 311. Limiting inner plate; 32. Positioning pin; 33. Guide rod; 34. Return spring; 4. Limiting slide groove; 5. Reinforcing rib; 6. Strip groove; 7. Positioning hole. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example

[0020] like Figure 1-4 As shown, this utility model proposes a hammering tool for removing sand shells from lost-wax investment casting, including a handle 1 and a hammering head 2. The handle 1 includes a grip 11 and a connecting rod 12, which are integrally formed and fixedly connected. The outer ring of the grip 11 is fitted with an anti-slip sleeve 111, and the outer ring of the anti-slip sleeve 111 has multiple sets of grip grooves 113. The grip grooves 113 are designed to better fit the human hand, ensuring the comfort and stability of the operator when holding the handle 1. The inner ring of the anti-slip sleeve 111 is connected to the grip. A rubber sleeve 112 is provided between the handles 11 and 11. The inner cavity of the anti-slip sleeve 111 has a shock-absorbing chamber. The rubber sleeve 112 is installed correspondingly to the shock-absorbing chamber and is fixedly connected to the anti-slip sleeve 111 through the shock-absorbing chamber. The rubber sleeve 112 is elliptical and hollow. The design of the rubber sleeve 112 can reduce the vibration generated during striking and transmit it to the operator's hand, thereby reducing operator fatigue. The striking head 2 is installed correspondingly to the end of the connecting rod 12 away from the handle 11. A threaded hole 21 is provided at the middle position on the striking head 2. One end of the connecting rod 12 has an outer ring with... The device has external threads, with the threaded hole 21 corresponding to the threaded end of the connecting rod 12. The striking head 2 is threadedly connected to the connecting rod 12, and the threaded connection between the striking head 2 and the handle 1 facilitates quick disassembly and replacement by the operator. The striking head 2 is shaped like a cross and is made of high-hardness alloy steel, possessing excellent wear resistance and strength. The cross shape of the striking head 2 allows it to have multiple striking surfaces, thus better adapting to different working conditions. The striking head 2 has four sets of different shapes. The striking head 2 has four sets of striking surfaces of different shapes: a flat striking surface, an arc striking surface, a conical striking surface, and a crushing striking surface. The flat striking surface is used to strike the flat area of ​​the sand shell, the arc striking surface is used to strike the arc or corner area of ​​the sand shell, the conical striking surface is used to strike the sand shell in a hard-bearing manner, and the crushing striking surface is used to strike the sand shell in a crushing manner. The setting of the four sets of striking surfaces of different shapes on the striking head 2 can adapt to sand shells of different angles and shapes, improve the efficiency and targeting of the striking, and reduce damage to the surface of the casting.

[0021] A positioning component 3 is provided on the connecting rod 12. The positioning component 3 includes a collar 31, the inner ring of which is fitted with the outer ring of the connecting rod 12. The collar 31 is slidably connected to the connecting rod 12. A limiting groove 4 is provided on the connecting rod 12. Multiple sets of reinforcing ribs 5 are provided on the inner wall of the limiting groove 4. The mounting end of the reinforcing rib 5 is fixedly connected to the inner wall of the limiting groove 4. The multiple sets of reinforcing ribs 5 can enhance the strength of the connecting rod 12 after the limiting groove 4 is provided, and prevent the strength of the connecting rod 12 from being reduced due to the limiting groove 4. A limiting inner plate 311 is provided at the middle position on the collar 31. The limiting inner plate 311 is fixedly connected to the inner ring of the collar 31. The limiting inner plate 311 is fitted with the inner wall of the limiting groove 4. The sliding groove 4 is slidably connected, and the inner limiting plate 311 has multiple sets of strip grooves 6. Reinforcing ribs 5 are installed correspondingly to the strip grooves 6, and are slidably connected to them. The inner limiting plate 311 guides and limits the movement of the collar 31 outside the connecting rod 12, thus ensuring the stability of the collar 31. Multiple sets of positioning pins 32 are provided on one side of the collar 31. One end of each positioning pin 32 is installed correspondingly to one side of the collar 31, and the mounting end of the positioning pin 32 is fixedly connected to the collar 31. Multiple sets of positioning holes 7 are provided on the striking head 2. The top end of each positioning pin 32 is installed correspondingly to one of the positioning holes 7, and is slidably connected to them. The cooperation between the positioning pins 32 and the positioning holes 7 allows for the positioning of the striking head 2. This improves the stability of the striking head 2 when it is assembled with the handle 1. A guide rod 33 is provided inside the connecting rod 12. The two ends of the guide rod 33 are installed corresponding to the inner walls of the limiting slide groove 4. The guide rod 33 is fixedly connected to the connecting rod 12 through the limiting slide groove 4. A guide hole is provided at the middle position on the limiting inner plate 311. The outer ring of the guide rod 33 is installed corresponding to the inner wall of the guide hole. The guide rod 33 is slidably connected to the guide hole. The setting of the guide rod 33 can guide and limit the movement of the collar 31 again through the limiting inner plate 311. A return spring 34 is sleeved on the outer ring of the guide rod 33 and one side of the collar 31. One end of the return spring 34 is installed corresponding to one side of the limiting inner plate 311. One side of the inner plate 311 is fixedly connected, and the other end of the return spring 34 is installed corresponding to the inner wall of one end of the limiting slide groove 4. The other end of the return spring 34 is fixedly connected to the inner wall of the limiting slide groove 4. The setting of the return spring 34 can continuously push the collar 31, so that the guide rod 33 can push the hammer head 2 in the assembly state, thereby further improving the stability of the hammer head 2 in the assembly state and avoiding the hammer head 2 and handle 1 from stripping due to hammering operation. The setting of the positioning component 3 ensures the stability of the hammer head 2 and handle 1 in the assembly state, which is convenient for the operator to quickly disassemble and replace the hammer head 2. The appropriate hammer head can be selected according to different sand shell conditions, which improves the versatility and practicality of the tool.

[0022] In this embodiment, the operator holds the handle 11 and selects the appropriate striking surface on the striking head 2 to strike the sand shell according to its shape and position.

[0023] When it is necessary to replace the striking surface of the striking head 2, the operator first moves the collar 31. The collar 31 moves along the connecting rod 12 through the limiting inner plate 311. At this time, the limiting inner plate 311 compresses the return spring 34 along the guide rod 33, so that the return spring 34 is in a compressed state. At the same time, the movement of the collar 31 drives the positioning pin 32 to disengage from the positioning hole 7, so that the striking head 2 can rotate. Then the operator rotates the striking head 2 so that the striking surface on the striking head 2 corresponds to the holding direction of the anti-slip sleeve 111. Then the operator releases the collar 31. Under the reset action of the return spring 34, the limiting inner plate 311 drives the collar 31 to return to the initial state. At this time, the collar 31 drives the positioning pin 32 to be inserted into the positioning hole 7 on the striking head 2, thereby completing the positioning and assembly operation of the striking head 2.

[0024] The above-described specific embodiments are merely preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above-described specific embodiments.

Claims

1. A hammering tool for removing sand shells from lost-wax investment casting, comprising a handle (1) and a hammering head (2), characterized in that: The handle (1) includes a grip (11) and a connecting rod (12). The outer ring of the grip (11) is fitted with an anti-slip sleeve (111). A rubber sleeve (112) is provided between the inner ring of the anti-slip sleeve (111) and the grip (11). A positioning component (3) is provided on the connecting rod (12). The positioning component (3) includes a collar (31). Multiple positioning pins (32) are provided on one side of the collar (31). A guide rod (33) is provided inside the connecting rod (12). A return spring (34) is fitted on the outer ring of the guide rod (33) and one side of the collar (31). The striking head (2) is installed corresponding to the end of the connecting rod (12) away from the grip (11). The striking head (2) is provided with four different shaped striking surfaces.

2. The hammering tool for removing sand shells from lost-wax investment casting according to claim 1, characterized in that, The grip (11) and the connecting rod (12) are integrally formed. The outer ring of the anti-slip sleeve (111) has multiple sets of grip grooves (113). The inner cavity of the anti-slip sleeve (111) has a shock-absorbing cavity. The rubber sleeve (112) is installed in correspondence with the shock-absorbing cavity.

3. The hammering tool for removing sand shells from lost-wax investment casting according to claim 1, characterized in that, The inner ring of the collar (31) is in contact with the outer ring of the connecting rod (12). A limiting groove (4) is provided on the connecting rod (12). Multiple sets of reinforcing ribs (5) are provided on the inner wall of the limiting groove (4). A limiting inner plate (311) is provided at the middle position on the collar (31). The limiting inner plate (311) is in contact with the inner wall of the limiting groove (4). Multiple sets of strip grooves (6) are provided on the limiting inner plate (311). The reinforcing ribs (5) are installed in correspondence with the strip grooves (6).

4. The hammering tool for removing sand shells from lost-wax investment casting according to claim 1, characterized in that, One end of the positioning pin (32) is installed corresponding to one side of the collar (31), and multiple sets of positioning holes (7) are opened on the striking head (2), with the top end of the positioning pin (32) corresponding to the positioning hole (7).

5. The hammering tool for removing sand shells from lost-wax investment casting according to claim 3, characterized in that, The two ends of the guide rod (33) are installed corresponding to the inner walls of the two ends of the limiting slide groove (4). A guide hole is provided on the limiting inner plate (311) at the middle position. The outer ring of the guide rod (33) is installed corresponding to the inner wall of the guide hole. One end of the reset spring (34) is installed corresponding to one side of the limiting inner plate (311), and the other end of the reset spring (34) is installed corresponding to one end of the inner wall of the limiting slide groove (4).

6. The hammering tool for removing sand shells from lost-wax investment casting according to claim 1, characterized in that, The striking head (2) has a threaded hole (21) at the middle position, and one end of the connecting rod (12) has an external thread. The threaded hole (21) is installed corresponding to the end of the connecting rod (12) with the external thread.

7. The hammering tool for removing sand shells from lost-wax investment casting according to claim 1, characterized in that, The striking head (2) is arranged in a "+" shape, and the four sets of striking surfaces with different shapes on the striking head (2) are a planar striking surface, an arc striking surface, a conical striking surface and a breaking striking surface.

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