阅读说明：本技术 一种高精度铸件铸造工艺 (High-precision casting process ) 是由 陈秀兰 于 2020-06-13 设计创作，主要内容包括：本发明涉及一种高精度铸件铸造工艺,该高精度铸件铸造工艺采用如下挂涂机械,该挂涂机械包括浸料仓,浸料仓为顶部呈开口的矩形凹槽结构,且浸料仓内放置有放置笼,浸料仓的左右两侧壁顶部均安装有定滑轮,浸料仓的左右两侧外壁均设置有牵引装置,该挂涂机械还包括多组设置在浸料仓背面的喷淋装置。本发明利用放置笼与喷淋装置配合,可以对蜡模进行均匀喷淋,同时通过设置分隔机构增加蜡模的放置空间,一次性可对多个蜡模进行挂涂涂料,提高了蜡模的挂涂效率；本发明通过定滑轮和牵引机构相配合,人工脚踩牵引机构,实现对放置笼的提拉,既能够对蜡模上的涂料进行沥干,使蜡模润湿均匀,又便于取出润湿好的蜡模、放置待润湿的蜡模。(The invention relates to a high-precision casting process, which adopts a hanging coating machine, wherein the hanging coating machine comprises a soaking bin, the soaking bin is of a rectangular groove structure with an open top, a placing cage is arranged in the soaking bin, fixed pulleys are arranged on the tops of the left side wall and the right side wall of the soaking bin, traction devices are arranged on the outer walls of the left side wall and the right side wall of the soaking bin, and the hanging coating machine also comprises a plurality of groups of spraying devices arranged on the back surface of the soaking bin. The wax pattern hanging and coating device has the advantages that the wax patterns can be uniformly sprayed by matching the placing cage with the spraying device, meanwhile, the placing space of the wax patterns is increased by arranging the separating mechanism, a plurality of wax patterns can be hung and coated with coating at one time, and the hanging and coating efficiency of the wax patterns is improved; according to the invention, the fixed pulley is matched with the traction mechanism, and the traction mechanism is manually stepped on by feet, so that the placing cage is lifted, the paint on the wax mould can be drained, the wax mould is uniformly wetted, and the wetted wax mould is convenient to take out and place.)

1. A high-precision casting process adopts the following hanging coating machine, and the hanging coating machine comprises a leaching bin (10), and is characterized in that: the leaching bin (10) is of a rectangular groove structure with an open top, a placing cage (20) is placed in the leaching bin (10), the placing cage (20) comprises a first grid plate (21) and a side plate (22) fixed on one side of the first grid plate (21), an outer edge (23) parallel to the side plate (22) is arranged on the other side of the first grid plate (21), multiple groups of movable pulleys (24) are arranged on one sides, far away from the first grid plate (21), of the outer walls of the side plate (22) and the outer edge (23), and multiple groups of partition mechanisms (25) are arranged above the first grid plate (21) from top to bottom;

the top parts of the left side wall and the right side wall of the leaching bin (10) are respectively provided with a fixed pulley (30), each fixed pulley (30) comprises two groups of bearings (31) with seats, the bearings (31) with the seats are fixed to the top parts of the side walls of the leaching bin (10), a rotating shaft (32) is erected between the two groups of bearings (31) with the seats, two ends of the rotating shaft (32) are rotatably connected with the bearings (31) with the seats, a rotating roller (33) is fixedly sleeved outside the rotating shaft (32), a plurality of groups of annular grooves (34) which are linearly distributed along the length direction of the rotating roller (33) are formed in the rotating roller (33), and the annular grooves;

the outer walls of the left side and the right side of the leaching bin (10) are respectively provided with a traction device (40), each traction device (40) comprises a square pipe (41) and an extension rod (42) fixed at the tail end of the square pipe (41), a traction roller (45) is erected between two groups of extension rods (42) positioned on the same side, the outer part of each traction roller (45) is fixedly connected with a plurality of groups of traction ropes (46), the traction ropes (46) correspond to the movable pulleys (24) one by one, the traction ropes (46) sequentially bypass the annular groove (34) and the movable pulley (24) and are finally fixedly connected with the inner side wall of the leaching bin (10), and a pedal (47) is fixedly installed on one side, far away from the traction rollers (45), of the outer wall of;

the hanging coating machine further comprises a plurality of groups of spraying devices (50) arranged on the back of the dipping bin (10), each spraying device (50) comprises an L-shaped pipe (51) and a horizontal pipe (52) screwed on the top of the L-shaped pipe (51), the horizontal section of the L-shaped pipe (51) is communicated with the dipping bin (10), the bottom of the horizontal pipe (52) is provided with a plurality of groups of spraying heads (53) which are linearly distributed along the length direction of the horizontal pipe, the vertical section of the L-shaped pipe (51) is also provided with a coating pump (54) and a valve (55), and the coating pump (54) is fixedly connected with the dipping bin (10) through a support;

the high-precision casting process comprises the following steps:

s1 wax pattern stacking: stacking the wax patterns on the first grid plate (21), buckling the separating mechanisms (25) in sequence after the first grid plate (21) is fully placed, and placing the wax patterns on each group of separating mechanisms (25);

s2 spray coating: a paint pump (54) and a valve (55) are opened, the paint in the dipping bin (10) is pumped into the horizontal pipe (52) under the action of the paint pump (54) and is sprayed onto a wax mold placed in the cage (20) through a spray header (53), and the wax mold is completely wetted after being sprayed for multiple times;

s3, draining the paint: closing a paint pump (54) and a valve (55), stepping on a traction roller (45) or a pedal (47) by a foot, rapidly applying downward pressure to the traction roller (45), driving an extension rod (42) to overturn downwards by a square pipe (41) through a telescopic rod (43), applying tension to a traction rope (46), driving a first grid plate (21) to gradually move upwards by a movable pulley (24) under the action of the traction rope (46), lifting the whole placing cage (20), keeping the stepping action, removing part of external force, descending the placing cage (20) under the action of self weight, repeating the steps to drain redundant paint on the surface of a wax mould, and enabling the paint on the surface of the mould to be more uniform;

s4 taking out the wax mold: the horizontal pipe (52) is horizontally rotated by 90 degrees, the spray head (53) is not positioned right above the placement cage (20), the force acting on the traction roller (45) or the pedal (47) is increased, so that the pulling force applied to the traction rope (46) is increased, the height of the placement cage (20) gradually rises, the separating mechanisms (25) are sequentially opened, the wax molds are taken out, each group of separating mechanisms (25) is opened, the traction roller (45) or the pedal (47) is stepped downwards for a certain distance, and the placement cage (20) rises for a certain height along with the stepping until all the wax molds on the first grid plate (21) are taken out.

2. The high-precision casting process according to claim 1, wherein: the partition mechanism (25) comprises a second grid plate (251) hinged to the side wall of the side plate (22), a supporting plate (252) is vertically arranged at the other end of the second grid plate (251), the bottom of the second grid plate (251) is located at the front side and the rear side, third grid plates (253) are vertically arranged at the front side and the rear side, and wax molds are placed on the first grid plate (21) and the second grid plate (251).

3. The high-precision casting process according to claim 2, wherein: the top of the supporting plate (252) is higher than the second grid plate (251), the bottom of the supporting plate (252) positioned at the lowest part is contacted with the top of the outer edge (23), and two adjacent groups of supporting plates (252) are contacted with each other.

4. The high-precision casting process according to claim 1, wherein: the utility model discloses a telescopic pipe, including the terminal fixedly connected with of extension rod (42) slide telescopic link (43) of setting in square pipe (41), waist type groove (431) have been seted up to the lateral wall of telescopic link (43), and the outer wall of square pipe (41) is close to the open end and has seted up threaded hole, and the diameter of threaded hole is the same with the width in waist type groove (431), and threaded hole internal thread connects locking bolt (44) that are used for fixed telescopic link (43), and the bottom of locking bolt (44) extends to in waist type groove (431).

5. The high-precision casting process according to claim 1, wherein: both ends fixedly connected with center pin (451) of carry over pinch rolls (45), and center pin (451) and extension rod (42)'s lateral wall fixed connection.

6. The high-precision casting process according to claim 1, wherein: the spraying devices (50) are linearly distributed along the horizontal direction, the dipping bin (10) is filled with paint, and the liquid level of the paint is over the horizontal section of the L-shaped pipe (51).

7. The high-precision casting process according to claim 1, wherein: the inner side wall of the leaching bin (10) is provided with a fixing pin used for being connected with a traction rope (46), and the tail end of the fixing pin is connected with a limiting ring in a threaded mode.

Technical Field

The invention relates to the technical field of lost foam casting, in particular to a high-precision casting process.

Background

The lost foam is also called wax mold, is a common casting mode, and is a new process with near-allowance-free and accurate molding, and the process does not need to take a mold, a parting surface and a sand core, so that the casting has no flash, burr and draft, the dimension error caused by the combination of the core is reduced, and the lost foam is suitable for casting high-precision castings. The investment precision casting mainly comprises the procedures of manufacturing a mould, manufacturing a wax mould, manufacturing a shell mould and then drying, roasting, pouring, solidifying and the like; the main processes and the technology in the shell manufacturing process are as follows: 1. degreasing and degreasing the module; 2. coating and sanding on the module; 3. drying and hardening the shell; 4. melting lost pattern from the shell; 5. and (5) roasting the shell.

Disclosure of Invention

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a high-precision casting process adopts a hanging and coating machine, the hanging and coating machine comprises a soaking bin, the top of the soaking bin is of an open rectangular groove structure, a placing cage is placed in the soaking bin, the placing cage comprises a first grid plate and a side plate fixed on one side of the first grid plate, the other side of the first grid plate is provided with an outer edge parallel to the side plate, a plurality of groups of movable pulleys are arranged on one sides, far away from the first grid plate, of the outer walls of the side plate and the outer edge, and a plurality of groups of separation mechanisms are arranged above the first grid plate from top to bottom;

the top parts of the left side wall and the right side wall of the leaching bin are provided with fixed pulleys respectively, each fixed pulley comprises two groups of bearings with seats fixed on the top parts of the side walls of the leaching bin, a rotating shaft is erected between the two groups of bearings with seats, two ends of the rotating shaft are rotatably connected with the bearings with seats, a rotating roller is fixedly sleeved outside the rotating shaft, a plurality of groups of annular grooves which are linearly distributed along the length direction of the rotating roller are formed in the rotating roller, and the annular grooves correspond to the movable pulleys one by one;

the outer walls of the left side and the right side of the leaching bin are provided with traction devices, each traction device comprises a square pipe and extension rods fixed at the tail ends of the square pipes, a traction roller is erected between the two sets of extension rods positioned on the same side, the outer part of each traction roller is fixedly connected with a plurality of groups of traction ropes, the traction ropes correspond to the movable pulleys one by one, the traction ropes sequentially pass around the annular grooves and the movable pulleys and are finally fixedly connected with the inner side wall of the leaching bin, and a pedal plate is fixedly installed on one side, far away from the traction rollers, of the outer wall;

the hanging coating machine also comprises a plurality of groups of spraying devices arranged on the back of the dipping bin, each spraying device comprises an L-shaped pipe and a horizontal pipe screwed on the top of the L-shaped pipe, the horizontal section of the L-shaped pipe is communicated with the dipping bin, a plurality of groups of spraying heads which are linearly distributed along the length direction of the horizontal pipe are arranged at the bottom of the horizontal pipe, a coating pump and a valve are also arranged on the vertical section of the L-shaped pipe, and the coating pump is fixedly connected with the dipping bin through a support;

the high-precision casting process comprises the following steps:

s1 wax pattern stacking: stacking the wax patterns on the first grid plate, sequentially buckling the separation mechanisms after the first grid plate is fully placed, and placing the wax patterns on each group of separation mechanisms;

s2 spray coating: opening a coating pump and a valve, pumping the coating in the leaching bin into a horizontal pipe under the action of the coating pump, spraying the coating onto a wax mold placed in a cage through a spray header, and completely wetting the wax mold after multiple times of spraying;

s3, draining the paint: the coating pump and the valve are closed, the foot steps on the traction roller or the pedal plate to quickly apply downward pressure to the traction roller, the square pipe drives the extension rod to overturn downwards through the telescopic rod, the traction rope is subjected to tension at the moment, the movable pulley drives the first grid plate to move upwards gradually under the action of the traction rope, so that the whole placing cage is lifted, the foot stepping action is kept, partial external force is removed, the placing cage descends under the action of self weight, the operation is repeated, redundant coating on the surface of the wax mold is drained, and the coating on the surface of the mold set is more uniform;

s4 taking out the wax mold: rotate the horizontal pipe level 90 degrees, the shower head is no longer in and places the cage directly over, increases the power of acting on carry over pinch rolls or running-board to increase the pulling force that the haulage rope received, the height of placing the cage rises gradually, opens separating mechanism in proper order, and the waxing jig takes out, and every opens a set of separating mechanism, then steps on one section distance with carry over pinch rolls or running-board downwards, places the cage and rises one section height thereupon, until taking out wax matrix on the first net board is whole.

Preferably, partition mechanism is including articulating the second net board at the curb plate lateral wall, and the other end of second net board is provided with the backup pad perpendicularly, and both sides are provided with the third net board perpendicularly around the bottom of second net board is located, all has placed the wax matrix on first net board and the second net board.

Preferably, the top of the supporting plate is higher than the second grid plate, the bottom of the supporting plate positioned at the lowest part is contacted with the top of the outer edge, and two adjacent groups of supporting plates are contacted with each other.

Preferably, the terminal fixedly connected with of extension rod slides the telescopic link that sets up in the square tube, and waist type groove has been seted up to the lateral wall of telescopic link, and the outer wall of square tube is close to the open end and has seted up threaded hole, and the diameter of screw hole is the same with the width in waist type groove, and threaded hole threaded connection has the locking bolt who is used for fixed telescopic link, and the bottom of locking bolt extends to in the waist type groove.

Preferably, both ends fixedly connected with center pin of carry over pinch rolls, and center pin and extension rod's lateral wall fixed connection.

Preferably, the spraying devices are linearly distributed along the horizontal direction, the dipping bin is filled with the coating, and the liquid level of the coating is over the horizontal section of the L-shaped pipe.

Preferably, the inner side wall of the leaching bin is provided with a fixing pin for connecting a traction rope, and the tail end of the fixing pin is in threaded connection with a limiting ring.

Advantageous effects

1. The wax pattern hanging and coating device has the advantages that the wax patterns can be uniformly sprayed by matching the placing cage with the spraying device, meanwhile, the placing space of the wax patterns is increased by arranging the separating mechanism, a plurality of wax patterns can be hung and coated with coating at one time, and the hanging and coating efficiency of the wax patterns is improved;

2. according to the invention, the fixed pulley is matched with the traction mechanism, and the traction mechanism is manually stepped on by feet, so that the placing cage is lifted, the paint on the wax mould can be drained, the wax mould is uniformly wetted, and the wetted wax mould is convenient to take out and place.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a perspective view of a first grid plate and side plate of the present invention;

FIG. 4 is a perspective view of the partition mechanism of the present invention;

FIG. 5 is a perspective view of the crown block of the present invention;

FIG. 6 is an enlarged schematic view of area A of FIG. 2 in accordance with the present invention;

FIG. 7 is an enlarged schematic view of area B of FIG. 2 in accordance with the present invention;

fig. 8 is a schematic structural view of the spray device of the present invention.

In the figure: 10. an leaching bin; 20. placing a cage; 21. a first grid plate; 22. a side plate; 23. an outer edge; 24. a movable pulley; 25. a separation mechanism; 251. a second grid plate; 252. a support plate; 253. a third grid plate; 30. a fixed pulley; 31. a pedestal bearing; 32. a rotating shaft; 33. rotating the roller; 34. an annular groove; 40. a traction device; 41. a square tube; 42. an extension rod; 43. a telescopic rod. 431. A waist-shaped groove; 44. locking the bolt; 45. a traction roller; 451. a central shaft; 46. a hauling rope; 47. a foot pedal; 50. a spraying device; 51. an L-shaped pipe; 52. a horizontal tube; 53. a shower head; 54. a paint pump; 55. and (4) a valve.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 2 to 8, a high-precision casting process adopts a hanging coating machine, the hanging coating machine comprises a soaking bin 10 and a placing cage 20 placed in the soaking bin 10, the soaking bin 10 is of a rectangular groove structure with an open top, the placing cage 20 comprises a first grid plate 21 and a side plate 22 fixed on one side of the first grid plate 21, the other side of the first grid plate 21 is provided with an outer edge 23 parallel to the side plate 22, and a plurality of groups of partition mechanisms 25 are arranged above the first grid plate 21 from top to bottom; the partition mechanism 25 comprises a second grid plate 251 hinged on the side wall of the side plate 22, a support plate 252 is vertically arranged at the other end of the second grid plate 251, the top of the support plate 252 is higher than the second grid plate 251, the bottom of the support plate 252 positioned at the lowest part is contacted with the top of the outer edge 23, two adjacent groups of support plates 252 are contacted with each other, and third grid plates 253 are vertically arranged at the front side and the rear side of the bottom of the second grid plate 251; when the wax pattern is fully placed on the first grid plate 21, the partition mechanisms 25 are sequentially buckled, the wax pattern is placed on each layer of the second grid plate 251, the third grid plate 253 plays a role in limiting the wax pattern, and meanwhile, the paint in the leaching bin 10 can conveniently wet the wax pattern on the second grid plate 251 through the third grid plate 253;

a plurality of groups of movable pulleys 24 are arranged on one sides, far away from the first grid plate 21, of the outer walls of the side plates 22 and the outer edges 23, the movable pulleys 24 are linearly distributed along the length direction of the outer edges 23, fixed pulleys 30 are arranged on the tops of the left side wall and the right side wall of the material soaking bin 10, each fixed pulley 30 comprises two groups of bearings 31 with seats, which are fixed on the tops of the side walls of the material soaking bin 10, a rotating shaft 32 is erected between the two groups of bearings 31 with seats, two ends of the rotating shaft 32 are rotatably connected with the bearings 31 with seats, a rotating roller 33 is fixedly sleeved outside the rotating shaft 32, a plurality of groups of annular grooves 34 which are linearly distributed along the length direction of the rotating roller 33 are formed in the;

the outer walls of the left side and the right side of the leaching bin 10 are respectively provided with a traction device 40, each traction device 40 comprises a square pipe 41 hinged to the front end and the rear end of the side wall of the leaching bin 10 and an expansion link 43 arranged in the square pipe 41 in a sliding manner, a waist-shaped groove 431 is formed in the side wall of the expansion link 43, a threaded hole is formed in the outer wall of the square pipe 41 close to the opening end, the diameter of the threaded hole is the same as the width of the waist-shaped groove 431, a locking bolt 44 used for fixing the expansion link 43 is screwed in the threaded hole, and; the tail end of the telescopic rod 43 is fixedly connected with an extension rod 42, a traction roller 45 is erected between two groups of extension rods 42 positioned on the same side, two ends of the traction roller 45 are fixedly connected with a central shaft 451, the central shaft 451 is fixedly connected with the side wall of the extension rod 42, a plurality of groups of traction ropes 46 are fixedly connected to the outer portion of the traction roller 45, the traction ropes 46 correspond to the movable pulleys 24 one by one, the traction ropes 46 sequentially bypass the annular groove 34 and the movable pulleys 24 and are finally fixedly connected with the inner side wall of the leaching bin 10, the inner side wall of the leaching bin 10 is provided with a fixing pin for connecting the traction ropes 46, and the tail end of the fixing pin; a foot pedal 47 is fixedly installed on one side, away from the traction roller 45, of the outer wall of the extension rod 42, a foot steps on the traction roller 45 or the foot pedal 47 to apply downward pressure to the traction roller 45, the square tube 41 drives the extension rod 42 to turn over downwards through the telescopic rod 43, at the moment, the traction rope 46 is under tension, and the movable pulley 24 drives the first grid plate 21 to gradually move upwards under the action of the traction rope 46, so that the whole placing cage 20 is lifted; the distance from the traction roller 45 to the tail end of the square pipe 41 is changed by adjusting the length of the telescopic rod 43 in the square pipe 41, and the longer the distance, the smaller the force acting on the traction roller 45 or the pedal 47 when the placing cage 20 is lifted to the same height, and the smaller the rotation angle of the square pipe 41;

the hanging coating machine further comprises a plurality of groups of spraying devices 50 arranged on the back of the dipping bin 10, the spraying devices 50 are linearly distributed along the horizontal direction, each spraying device 50 comprises an L-shaped pipe 51 and a horizontal pipe 52 screwed on the top of the L-shaped pipe 51, the horizontal section of the L-shaped pipe 51 is communicated with the dipping bin 10, the bottom of the horizontal pipe 52 is provided with a plurality of groups of spraying heads 53 linearly distributed along the length direction of the horizontal pipe, each spraying head 53 is positioned above the placement cage 20, the bottom of each spraying head 53 is higher than the fixed pulley 30, a coating pump 54 and a valve 55 are further arranged on the vertical section of the L-shaped pipe 51, the coating pump 54 is fixedly connected with the dipping bin 10 through a support, coating is contained in the dipping bin 10, the liquid level of the coating does not exceed the horizontal section of the L-shaped pipe 51, and the coating pump 54 pumps the coating into the horizontal pipe 52 and sprays the coating onto a wax mold placed in the cage 20 through;

as shown in fig. 1, the high-precision casting process comprises the following steps:

s1 wax pattern stacking: stacking the wax patterns on the first grid plate 21, after the first grid plate 21 is fully placed, sequentially buckling the separating mechanisms 25, placing the wax patterns on each layer of second grid plate 251, and not placing the wax patterns on the second grid plate 251 on the topmost layer;

s2 spray coating: the paint pump 54 and the valve 55 are opened, the paint in the dipping bin 10 is pumped into the horizontal pipe 52 under the action of the paint pump 54 and is sprayed onto the wax pattern in the placing cage 20 through the spray head 53, and the wax pattern is completely wetted after being sprayed for multiple times;

s3, draining the paint: closing the paint pump 54 and the valve 55, stepping on the traction roller 45 or the pedal 47 by a foot to quickly apply downward pressure to the traction roller 45, driving the extension rod 42 to turn downwards by the square tube 41 through the telescopic rod 43, pulling the traction rope 46 at the moment, driving the first grid plate 21 to gradually move upwards by the movable pulley 24 under the action of the traction rope 46, so as to lift the whole placing cage 20, keep the stepping action, remove part of external force, and lower the placing cage 20 under the action of self weight, so as to repeatedly drain the redundant paint on the surface of the wax mould, thereby enabling the paint on the surface of the mould set to be more uniform;

s4 taking out the wax mold: the horizontal pipe 52 is horizontally rotated by 90 degrees, the spray header 53 is not positioned right above the placing cage 20 any more, the force acting on the traction roller 45 or the pedal plate 47 is increased, so that the pulling force on the traction rope 46 is increased, the height of the placing cage 20 gradually rises, the separating mechanisms 25 are sequentially opened, the wax molds are loaded and taken out, when one group of separating mechanisms 25 is opened, the traction roller 45 or the pedal plate 47 is stepped downwards for a certain distance, and the placing cage 20 rises for a certain height along with the ascending until all the wax molds on the first grid plate 21 are taken out.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.