A casting sand core repairing method and a special tool for repairing the core

Abstract

The present invention discloses a method for repairing a foundry sand core, comprising the following steps: providing a repairing rod and repairing heads adapted to the core hole of the sand core at both ends of the repairing rod, inserting the repairing rod into the core hole of the sand core, and removing the flash on the wall of the core hole of the sand core by the repairing head on the repairing rod; and providing an anti-tilt support mechanism on the repairing rod to support the core hole of the sand core, so that the axis of the repairing rod and the axis of the core hole of the sand core remain coincident. The present invention also discloses a special tool for repairing. The method for repairing a foundry sand core and the special tool for repairing a foundry sand core of the present invention belong to the technical field of foundry sand cores, and the flash removal can be completed by only passing the repairing rod and the repairing head through the core hole of the sand core, and different repairing heads are selected for different core hole diameters or shapes and installed on the repairing rod, so that the flash removal can be performed on different core holes, and the operation is simple, the flash removal efficiency is high, the flash removal is complete, and the quality of the core hole is guaranteed.

Description

Technical Field

[0001] The invention relates to a casting sand core technology, and more specifically, to a casting sand core repairing method and a special tool for repairing the core. Background Art

[0002] At present, when repairing the casting sand core, in the hole forming the cylindrical position of the casting, because the mold box surface is located in the middle of the hole, the flash is formed between the upper and lower molds, which needs to be repaired manually. The tool generally used is a file. Its disadvantages are as follows: 1. When using a file to repair the flash, it is necessary to go around the hole to completely remove the flash. If only half of the edge is scraped, the flash is not easily repaired cleanly, and defects are formed after the normal production and pouring of the sand core, resulting in defective products; 2. If the flash is not repaired, the casting may be scrapped after normal production. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One of the purposes of the present invention is to provide a method for repairing a casting sand core which can quickly and completely remove the flash from the core hole.

[0004] The second object of the present invention is to provide a special tool for repairing foundry sand cores.

[0005] To achieve the above-mentioned first objective, the present invention provides a method for core repairing of casting sand cores, comprising the following steps: providing a core repairing rod and core repairing heads matched with the core hole of the sand core at both ends of the core repairing rod, inserting the core repairing rod into the core hole of the sand core, the core repairing head on the core repairing rod can remove the burr on the wall of the core hole of the sand core; and providing an anti-tilt support mechanism on the core repairing rod to support it in the core hole of the sand core so that the axis of the core repairing rod and the axis of the core hole of the sand core remain coincident.

[0006] Furthermore, the anti-tilt support mechanism includes two sliding sleeves provided at both ends of the core repairing rod, a spring connected to the core repairing head is provided on the outer end surface of the sliding sleeve, and a brush structure is provided at an inclined extension on the outer edge of the sliding sleeve.

[0007] Furthermore, the brush structures are evenly arranged at the edge of the sliding sleeve in the circumferential direction around the center of the sliding sleeve.

[0008] Furthermore, two ends of the outer cylindrical surface of the core repairing rod are provided with a plurality of axially extending sliding grooves, and the inner wall of the sliding sleeve is provided with protrusions matched with the sliding grooves.

[0009] Furthermore, both ends of the core repairing rod are provided with annular grooves connected to the slide groove, the centers of the two core repairing heads are provided with positioning holes adapted to the ends of the core repairing rod, and the hole walls of the positioning holes are provided with blocks adapted to the slide groove and the annular groove.

[0010] To achieve the above-mentioned second purpose, the present invention also provides a special core repair tool for implementing the casting sand core repair method, including a core repair rod and core repair heads arranged at both ends of the core repair rod, the side surfaces of the core repair heads can adapt to the core hole wall of the sand core, and an anti-tilt support mechanism that can abut against the core hole wall of the sand core is provided on the core repair rod between the two core repair heads.

[0011] Furthermore, the anti-tilt support mechanism includes two sliding sleeves provided at both ends of the core repairing rod, a spring connected to the core repairing head is provided on the outer end surface of the sliding sleeve, and a brush structure is provided at an inclined extension on the outer edge of the sliding sleeve.

[0012] Furthermore, the brush structures are evenly arranged at the edge of the sliding sleeve in the circumferential direction around the center of the sliding sleeve.

[0013] Furthermore, two ends of the outer cylindrical surface of the core repairing rod are provided with a plurality of axially extending sliding grooves, and the inner wall of the sliding sleeve is provided with protrusions matched with the sliding grooves.

[0014] Furthermore, both ends of the core repairing rod are provided with annular grooves connected to the slide groove, the centers of the two core repairing heads are provided with positioning holes adapted to the ends of the core repairing rod, and the hole walls of the positioning holes are provided with blocks adapted to the slide groove and the annular groove.

[0015] Beneficial Effects

[0016] Compared with the prior art, the casting sand core repairing method and the special tool for repairing the core of the present invention have the following beneficial effects: (1) The casting sand core repairing method and the special tool for repairing the core of the present invention can complete the flash removal by only passing the repairing rod and the repairing head through the core hole of the sand core. Different repairing heads are selected for different core hole diameters or shapes and installed on the repairing rod, so that the flash removal of different core holes can be performed. The operation is simple, the flash removal efficiency is high, the flash removal is complete, and the quality of the core hole is guaranteed;

[0017] (2) In the present casting sand core repairing method, an anti-tilt support mechanism is provided to support the repairing rod. When the repairing head at one end of the repairing rod is inserted into the core hole, the upper part of the repairing rod can be supported on the wall of the core hole by the anti-tilt support mechanism. The anti-tilt support mechanism can prevent the repairing rod from tilting, and prevent the repairing head from getting stuck in the core hole or causing the corners of the repairing head to scratch the inner wall of the core hole. When only the repairing head at one end of the repairing rod is inserted into the core hole, the repairing rod can still remain coaxial with the core hole, ensuring that the repairing rod and the repairing head can smoothly pass through the core hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural front view of the casting sand core repairing method of the present invention;

[0019] Figure 2It is an enlarged schematic diagram of the structure of the anti-tilt support mechanism in the present invention;

[0020] Figure 3 It is a structural schematic diagram of the core repairing rod in the present invention;

[0021] Figure 4 It is an enlarged side view of the structure of the core repairing head in the present invention;

[0022] Figure 5 yes Figure 4 Structural cross-section view along the AA direction.

[0023] In the figure: 1. core repair rod; 2. core repair head; 3. anti-tilt support mechanism; 4. sliding sleeve; 5. spring; 6. brush structure; 7. sliding groove; 8. protrusion; 9. annular groove; 10. positioning hole; 11. clamping block. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0025] The specific implementation of the present invention is as follows: Figure 1-5 As shown, a method for repairing a casting sand core comprises the following steps: a repairing rod 1 is provided and repairing heads 2 which are adapted to the core hole of the sand core are provided at both ends of the repairing rod 1, the repairing head 2 is a cast iron structure, is not easy to wear, and has a long service life, the repairing rod 1 is inserted into the core hole of the sand core, and the repairing head 2 on the repairing rod 1 can remove the burr on the wall of the core hole of the sand core; and an anti-tilt support mechanism 3 is provided on the repairing rod 1 to support it in the core hole of the sand core so that the axis of the repairing rod 1 and the axis of the core hole of the sand core remain coincident. In the present foundry sand core repairing method, the repairing rod 1 and the repairing head 2 are inserted into the core hole of the sand core, and the outer wall of the repairing head 2 is in contact with the hole wall of the core hole. The repairing head 2 can remove the burr on the hole wall of the core hole, thereby ensuring the smoothness of the hole wall of the core hole and the quality of the product produced by the casting. The present foundry sand core repairing method only requires the repairing rod 1 and the repairing head 2 to pass through the core hole of the sand core to complete the burr removal. Different repairing heads 2 are selected for different core hole diameters or shapes and installed on the repairing rod 1, so that the burr of different core holes can be removed. The operation is simple, the burr removal efficiency is high, the removal is complete, and the quality of the core hole is guaranteed.

[0026] In the present casting sand core repairing method, an anti-tilt support mechanism 3 is provided to support the repairing core rod 1. When the repairing core head 2 at one end of the repairing core rod 1 is inserted into the core hole, the upper part of the repairing core rod 1 can be supported on the wall of the core hole by the anti-tilt support mechanism 3. The anti-tilt support mechanism 3 can prevent the repairing core rod 1 from tilting, and prevent the repairing core head 2 from getting stuck in the core hole or causing the corners of the repairing core head 2 to scratch the inner wall of the core hole. When only the repairing core head 2 at one end of the repairing core rod 1 is inserted into the core hole, the repairing core rod 1 can still remain coaxial with the core hole, ensuring that the repairing core rod 1 and the repairing core head 2 can smoothly pass through the core hole.

[0027] In this embodiment, the anti-tilt support mechanism 3 includes two sliding sleeves 4 provided at both ends of the core repairing rod 1, a spring 5 connected to the core repairing head 2 is provided on the outer end surface of the sliding sleeve 4, and a brush structure 6 is provided on the outer edge of the sliding sleeve 4, which is an elastic nylon fiber structure; when one end of the core repairing rod 1 is inserted into the core hole, the inclined brush structure 6 on the sliding sleeve 4 at the front end abuts against the inner wall of the core hole, so that the core repairing rod 1 is kept coaxial with the core hole under the support of the core repairing head 2 and the brush structure 6, and when the front end of the core repairing rod 1 When the insertion continues to the depth of the core hole, the sliding sleeve 4 enters the core hole under the pulling action of the spring 5, and the brush structure 6 on the sliding sleeve 4 continues to support the core repair rod 1; the core repair rod 1 is continued to be inserted into the core hole, and the brush structure 6 at the rear end of the core repair rod 1 also enters the core hole to support the core repair rod 1; the core repair rod 1 is continued to be inserted into the core hole, at this time, the core repair head 2 at the front end slides out of the core hole, and the core repair rod 1 is supported by the brush structures 6 at both ends and the core repair head 2 at the rear end. In this way, the axis of the core repair rod 1 and the core repair head 2 remain coaxial with the axis of the core hole.

[0028] Moreover, the brush structure 6 can further remove the flash on the inner wall of the core hole, making the inner wall of the core hole smoother.

[0029] In this embodiment, the brush structures 6 are evenly arranged at the edge of the sliding sleeve 4 in the circumferential direction around the center of the circle.

[0030] In this embodiment, a plurality of axially extending slide grooves 7 are provided at both ends of the outer cylindrical surface of the core repairing rod 1, and a protrusion 8 adapted to the slide groove 7 is provided on the inner wall of the sliding sleeve 4. The sliding sleeve 4 can be slidably connected to the slide groove 7 through the protrusion 8, ensuring that the sliding sleeve 4 can stably slide axially on the core repairing rod 1 and is not prone to rotation.

[0031] In this embodiment, annular grooves 9 connected to the slide groove 7 are provided at both ends of the core repairing rod 1, and positioning holes 10 matched with the ends of the core repairing rod 1 are provided in the centers of the two core repairing heads 2. A clamping block 11 matched with the slide groove 7 and the annular groove 9 is provided on the hole wall of the positioning hole 10. The core repairing head 2 can be slidably connected with the slide groove 7 through the clamping block 11, and quickly sleeved on the core repairing rod 1, and then the core repairing head 2 is rotated to make the clamping block 11 slide into the annular groove 9 on one side of the slide groove 7 for axial limitation, and then the two ends of the spring 5 are fixedly connected with the sliding sleeve 4 and the core repairing head 2, so that the core repairing head 2 can be quickly positioned on the core repairing rod 1, and the core repairing head 2 is not easy to rotate circumferentially.

[0032] A special tool for core repairing of a casting sand core, comprising a core repair rod 1 and a core repair head 2 arranged at both ends of the core repair rod 1, the side of the core repair head 2 being able to adapt to the core hole wall of the sand core, and an anti-tilting support mechanism 3 being able to abut against the core hole wall of the sand core is arranged between the two core repair heads 2 on the core repair rod 1. In the special tool for core repairing of a casting sand core, the core repair rod 1 and the core repair head 2 are inserted into the core hole of the sand core, the outer wall of the core repair head 2 contacts the hole wall of the core hole, the core repair head 2 can remove the flash on the hole wall of the core hole, ensure the smoothness of the hole wall of the core hole, and ensure the quality of the casting product; the special tool for core repairing of a casting sand core only needs to pass the core repair rod 1 and the core repair head 2 through the core hole of the sand core to complete the flash removal, different core hole diameters or shapes are selected and installed on the core repair rod 1, and different core holes can be flashed. The operation is simple, the flash removal efficiency is high, the flash removal is complete, and the quality of the core hole is ensured.

[0033] In the special tool for repairing casting sand cores, an anti-tilt support mechanism 3 is provided to support the repairing core rod 1. When the repairing core head 2 at one end of the repairing core rod 1 is inserted into the core hole, the upper part of the repairing core rod 1 can be supported on the wall of the core hole by the anti-tilt support mechanism 3. The anti-tilt support mechanism 3 can prevent the repairing core rod 1 from tilting, and prevent the repairing core head 2 from getting stuck in the core hole or causing the corners of the repairing core head 2 to scratch the inner wall of the core hole. When only the repairing core head 2 at one end of the repairing core rod 1 is inserted into the core hole, the repairing core rod 1 can still remain coaxial with the core hole, ensuring that the repairing core rod 1 and the repairing core head 2 can pass through the core hole smoothly.

[0034] In this embodiment, the anti-tilt support mechanism 3 includes two sliding sleeves 4 provided at both ends of the core repairing rod 1, a spring 5 connected to the core repairing head 2 is provided on the outer end surface of the sliding sleeve 4, and a brush structure 6 is provided on the outer edge of the sliding sleeve 4, which is an elastic nylon fiber structure; when one end of the core repairing rod 1 is inserted into the core hole, the inclined brush structure 6 on the sliding sleeve 4 at the front end abuts against the inner wall of the core hole, so that the core repairing rod 1 is kept coaxial with the core hole under the support of the core repairing head 2 and the brush structure 6, and when the front end of the core repairing rod 1 When the insertion continues to the depth of the core hole, the sliding sleeve 4 enters the core hole under the pulling action of the spring 5, and the brush structure 6 on the sliding sleeve 4 continues to support the core repair rod 1; the core repair rod 1 is continued to be inserted into the core hole, and the brush structure 6 at the rear end of the core repair rod 1 also enters the core hole to support the core repair rod 1; the core repair rod 1 is continued to be inserted into the core hole, at this time, the core repair head 2 at the front end slides out of the core hole, and the core repair rod 1 is supported by the brush structures 6 at both ends and the core repair head 2 at the rear end. In this way, the axis of the core repair rod 1 and the core repair head 2 remain coaxial with the axis of the core hole.

[0035] Moreover, the brush structure 6 can further remove the flash on the inner wall of the core hole, making the inner wall of the core hole smoother.

[0036] In this embodiment, the brush structures 6 are evenly arranged at the edge of the sliding sleeve 4 in the circumferential direction around the center of the circle.

[0037] In this embodiment, a plurality of axially extending slide grooves 7 are provided at both ends of the outer cylindrical surface of the core repairing rod 1, and a protrusion 8 adapted to the slide groove 7 is provided on the inner wall of the sliding sleeve 4. The sliding sleeve 4 can be slidably connected to the slide groove 7 through the protrusion 8, ensuring that the sliding sleeve 4 can stably slide axially on the core repairing rod 1 and is not prone to rotation.

[0038] In this embodiment, annular grooves 9 connected to the slide groove 7 are provided at both ends of the core repairing rod 1, and positioning holes 10 matched with the ends of the core repairing rod 1 are provided in the centers of the two core repairing heads 2. A clamping block 11 matched with the slide groove 7 and the annular groove 9 is provided on the hole wall of the positioning hole 10. The core repairing head 2 can be slidably connected with the slide groove 7 through the clamping block 11, and quickly sleeved on the core repairing rod 1, and then the core repairing head 2 is rotated to make the clamping block 11 slide into the annular groove 9 on one side of the slide groove 7 for axial limitation, and then the two ends of the spring 5 are fixedly connected with the sliding sleeve 4 and the core repairing head 2, so that the core repairing head 2 can be quickly positioned on the core repairing rod 1, and the core repairing head 2 is not easy to rotate circumferentially.

[0039] The clamping block 11 is a trapezoidal structure with one end being small and the other end being large. The clamping block 11 can be interference fit with the annular clamping groove 9 , so that the core repairing head 2 is fixed on the core repairing rod 1 .

[0040] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A method for repairing a foundry sand core, characterized in that: The following steps are involved: A core repair rod (1) and core repair heads (2) adapted to the core hole of the sand core are provided at both ends of the core repair rod (1). The core repair head (2) is a cast iron structure. The core repair rod (1) is inserted into the core hole of the sand core. The core repair head (2) on the core repair rod (1) can remove the burrs on the core hole wall of the sand core. An anti-tilt support mechanism (3) is provided on the core repair rod (1) to support the core hole wall of the sand core so that the axis of the core repair rod (1) and the axis of the core hole of the sand core are kept coincident. The anti-tilt support mechanism (3) comprises two sliding sleeves (4) provided at both ends of the core repair rod (1). A spring (5) connected to the core repair head (2) is provided on the outer end surface of the sliding sleeve (4). A brush structure (6) extending outward in an inclined manner is provided on the outer edge of the sliding sleeve (4). The brush structure (6) is an elastic nylon fiber structure.

2. A method for repairing a foundry sand core according to claim 1, characterized in that: The brush structures (6) are evenly arranged at the edge of the sliding sleeve (4) in a circumferential direction around the center of the circle.

3. A method for repairing a foundry sand core according to claim 1 or 2, characterized in that: A plurality of axially extending slide grooves (7) are provided at both ends of the outer cylindrical surface of the core repairing rod (1), and a protrusion (8) matching the slide grooves (7) is provided on the inner wall of the sliding sleeve (4).

4. A method for repairing a foundry sand core according to claim 3, characterized in that: Both ends of the core repairing rod (1) are provided with annular grooves (9) connected to the slide groove (7); the centers of the two core repairing heads (2) are provided with positioning holes (10) matched with the ends of the core repairing rod (1); and the hole walls of the positioning holes (10) are provided with clamping blocks (11) matched with the slide groove (7) and the annular groove (9).

5. A core repairing tool for implementing the casting sand core repairing method according to claim 1, characterized in that: The invention comprises a core repairing rod (1) and core repairing heads (2) arranged at both ends of the core repairing rod (1), the core repairing heads (2) being of a cast iron structure, the side surfaces of the core repairing heads (2) being adapted to the core hole wall of a sand core, an anti-tilting support mechanism (3) being arranged between the two core repairing heads (2) on the core repairing rod (1) and being capable of abutting against the core hole wall of the sand core, the anti-tilting support mechanism (3) comprising two sliding sleeves (4) arranged at both ends of the core repairing rod (1), a spring (5) connected to the core repairing heads (2) being arranged on the outer end surface of the sliding sleeve (4), and a brush structure (6) being arranged to extend obliquely on the outer edge of the sliding sleeve (4), the brush structure (6) being a nylon fiber structure having elasticity.

6. The core repairing tool according to claim 5, characterized in that: The brush structures (6) are evenly arranged at the edge of the sliding sleeve (4) in a circumferential direction around the center of the circle.

7. The core repairing tool according to claim 5 or 6, characterized in that: A plurality of axially extending slide grooves (7) are provided at both ends of the outer cylindrical surface of the core repairing rod (1), and a protrusion (8) matching the slide grooves (7) is provided on the inner wall of the sliding sleeve (4).

8. The core repairing tool according to claim 7, characterized in that: Both ends of the core repairing rod (1) are provided with annular grooves (9) connected to the slide groove (7); the centers of the two core repairing heads (2) are provided with positioning holes (10) matched with the ends of the core repairing rod (1); and the hole walls of the positioning holes (10) are provided with clamping blocks (11) matched with the slide groove (7) and the annular groove (9).

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