Particle liquid columnar jet flow forming device for polishing wiredrawing hole

Abstract

The particle liquid columnar jet flow forming device comprises a first pressure liquid supply flow channel with a first jet flow nozzle and a second pressure liquid supply flow channel with a second jet flow nozzle, and the first jet flow nozzle and the second jet flow nozzle are provided with a first jet flow hole and a second jet flow hole correspondingly. The first pressure liquid supply flow channel and the second pressure liquid supply flow channel can form negative pressure with the absolute value larger than that of the positive pressure when one forms positive pressure, the first jet flow nozzle and the second jet flow nozzle can be in butt joint with the two ends of the wire drawing die in an attached pressing mode, and the first jet flow hole, the wire drawing hole and the second jet flow hole form a temporarily-communicated linear flow channel. And the first jet flow hole and the second jet flow hole can spray columnar jet flow to the wire drawing hole under the action of positive pressure and can suck the columnar jet flow from the wire drawing hole under the action of negative pressure.

Description

Technical Field

[0001] The present invention relates to a device for forming a particulate liquid columnar jet for wire drawing hole grinding, belonging to the technical field of wire drawing die processing. Background Art

[0002] A wire drawing die is used to draw or extrude metal wire products that meet specifications and shapes. The smoothness of the wire drawing hole directly affects the qualification rate of metal wire products. Generally, the diameter of the wire drawing hole of a wire drawing die is very small, only 4 - 6 mm, and the length of the hole is about 15 - 20 mm. The processing process is usually to press a wire drawing hole original hole slightly smaller than the specified specification on the wire drawing die first, and then grind the round hole. Due to the too small diameter of the wire drawing hole, it is extremely easy to cause the core rod to break and block the hole when using the core rod to penetrate and form. At present, microbeam laser grinding is generally used, but it has too high requirements for operation accuracy. A slight deviation will cause the shape of the inner wall of the wire drawing hole to change abnormally and the inner hole diameter to exceed the specified value, resulting in the entire wire drawing die being scrapped.

[0003] To solve the above problems, our company has invented a method for grinding and polishing the wire drawing hole of a wire drawing die. A key problem involved in this method is that a particulate liquid columnar jet must be formed under pressure in a non-fixed and sealed flow channel, and particulate liquid leakage is not allowed. This non-fixed and sealed flow channel is a flow channel constructed by temporarily connecting a spray flow channel, a reflux flow channel, and the wire drawing hole of the wire drawing die in a pressing connection manner. The wire drawing hole of the wire drawing die is located between the spray flow channel and the reflux flow channel. Under working conditions, the wire drawing die needs to rotate at a high speed with the axis of the wire drawing hole as the axis. Therefore, it is impossible to implement fixed sealing between the wire drawing hole of the wire drawing die and the spray flow channel, as well as between the wire drawing hole and the reflux flow channel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to form a particulate liquid columnar jet under pressure in a non-fixed and sealed flow channel and ensure that particulate liquid does not leak in this section of the flow channel.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] A device for forming a particulate liquid columnar jet for wire drawing hole grinding includes a pressure liquid supply flow channel one with a jet nozzle one and a pressure liquid supply flow channel two with a jet nozzle two. The jet nozzle one and the jet nozzle two respectively have a jet hole one and a jet hole two. The pressure liquid supply flow channel one and the pressure liquid supply flow channel two can form a negative pressure with an absolute value greater than the positive pressure on the other side when one side forms a positive pressure. The jet nozzle one and the jet nozzle two can be respectively butted against both ends of the wire drawing die in a pressing manner, so that the jet hole one, the wire drawing hole, and the jet hole two form a temporarily connected linear flow channel, and both the jet hole one and the jet hole two can spray a columnar jet toward the wire drawing hole under the action of positive pressure and can suck the columnar jet from the wire drawing hole under the action of negative pressure.

[0007] The pressure liquid supply flow path 1 includes a pressure vessel 1 and a pressure liquid delivery pipe 1 with one end communicating with the pressure vessel 1 and the other end communicating with the jet nozzle 1. The pressure liquid supply flow path 2 includes a pressure vessel 2 and a pressure liquid delivery pipe 2 with one end communicating with the pressure vessel 2 and the other end communicating with the jet nozzle 2.

[0008] The aperture diameters of the jet holes 1 and 2 are equal to the aperture diameter of the wire drawing hole.

[0009] The jet nozzles 1 and 2 are conical bodies made of wear-resistant materials and having an outer conical surface.

[0010] The upper space and the lower space of the pressure vessel 1 are respectively an air pressure cavity 1 and a liquid storage space 1 for storing the particulate liquid. The upper space and the lower space of the pressure vessel 2 are respectively an air pressure cavity 2 and a liquid storage space 2 for storing the particulate liquid.

[0011] A forward air duct and a return air duct are arranged between the air pressure cavity 1 and the air pressure cavity 2. A forward air pressure pump and a return air pressure pump are respectively arranged on the forward air duct and the return air duct.

[0012] Normal pressure vent pipes communicating with the outside and the air pressure cavity 1 and the air pressure cavity 2 are respectively arranged on the pressure vessel 1 and the pressure vessel 2. A normal pressure switch capable of being closed under working conditions is arranged on the normal pressure vent pipe.

[0013] A dual-pressure protection and regulator for maintaining negative pressure and increasing positive pressure is arranged on the pressure vessel 1 and the pressure vessel 2. The dual-pressure protection and regulator includes a rigid inner lining body having air permeable holes and an elastic expansion sleeve sleeved outside the inner lining body. Vent holes 1 and 2 are respectively arranged at the tops of the pressure vessel 1 and the pressure vessel 2. The vent holes 1 and 2 communicate with the air pressure cavity 1 and the air pressure cavity 2 respectively. The sleeve openings of the expansion sleeves arranged on the pressure vessel 1 and the sleeve openings of the expansion sleeves arranged on the pressure vessel 2 are respectively sealed and bonded to the edges of the orifices of the vent holes 1 and 2. When positive pressure is formed in the inner cavity of the expansion sleeve, the expansion sleeve is expanded. When negative pressure is formed in the inner cavity of the expansion sleeve, the contraction of the expansion sleeve is restricted by the inner lining body.

[0014] Air valves 1 and 2 are respectively arranged on the pressure liquid delivery pipe 1 and the pressure liquid delivery pipe 2. When the columnar jet injection starts, the air valve on the negative pressure side opens first, and the air valve on the positive pressure side opens later.

[0015] A connecting pipe 1 is arranged between the pressure liquid delivery pipe 1 and the jet nozzle 1. A connecting pipe 2 is arranged between the pressure liquid delivery pipe 2 and the jet nozzle 2. Stop flanges 1 and 2 with threaded fit for adjusting the position back and forth are respectively arranged on the outer peripheries of the connecting pipe 1 and the connecting pipe 2. Compression springs 1 and 2 are respectively sleeved on the outer peripheries of the connecting pipe 1 between the stop flange 1 and the pressure liquid delivery pipe 1 and the outer peripheries of the connecting pipe 2 between the stop flange 2 and the pressure liquid delivery pipe 2. The jet nozzles 1 and 2 are respectively closely pressed against both ends of the wire drawing die by the compression springs 1 and 2 through cooperation with the fixture.

[0016] Beneficial effects:

[0017] It can form a stable and complete columnar jet in the wire drawing hole, and in the case of the rotation of the wire drawing die, the high-pressure particulate liquid in the flow channel that cannot be fixedly sealed from the jet hole through the wire drawing hole to the second jet hole will not leak. Description of the drawings

[0018] Figure 1 It is a cross-sectional schematic diagram of the forming device, in which it is shown that the first air valve and the second air valve are not opened, neither the forward air pressure pump nor the reverse air pressure pump is started, and the air pressures in the first air pressure cavity and the second air pressure cavity are both normal pressures;

[0019] Figure 2 It is an assembly schematic diagram of the fixture and the forming device, in which the wire drawing die has been clamped;

[0020] Figure 3 It is a cross-sectional schematic diagram of the first jet nozzle and the conical hole at one end of the wire drawing hole that cooperates with the first jet hole;

[0021] Figure 4 It is Figure 2 A partial schematic diagram of, in which the assembly relationship between the first jet nozzle, the second jet nozzle and the wire drawing die is shown;

[0022] Figure 5 It is Figure 1 A partial structural schematic diagram of;

[0023] Figure 6 It is a cross-sectional schematic diagram of the assembly relationship and working principle of the forming device and the fixture under the grinding condition of the wire drawing die. In the figure, it is shown that one side of the pressure vessel is under positive pressure, and a columnar jet is ejected by the first jet nozzle. The arrow A in the figure represents the flow direction of the particulate liquid, the arrow B represents the rotation direction of the wire drawing die, the arrow C represents the positive pressure direction of the air pressure, and the arrow D represents the negative pressure direction of the air pressure. The following arrow schematics are the same;

[0024] Figure 7 It is Figure 6 A partial schematic diagram of, in which the working conditions of the dual-pressure protection and regulator provided on the first pressure vessel and the dual-pressure protection and regulator provided on the second pressure vessel are shown;

[0025] Figure 8 It is Figure 6 A partial schematic diagram of, in which it is shown that the first jet nozzle ejects a columnar jet and the second jet nozzle inhales the columnar jet;

[0026] Figure 9 It is a cross-sectional schematic diagram of the assembly relationship and working principle of the forming device and the fixture under the grinding condition of the wire drawing die. In the figure, it is shown that one side of the second pressure vessel is under positive pressure, and a columnar jet is ejected by the second jet nozzle.

[0027] Figure 10 It is a schematic cross-sectional view of the fixture.

[0028] In the figure: 1. The first pressure liquid supply channel; 11. The first pressure vessel; 111. The first air pressure cavity; 112. The first ventilation hole; 12. The first pressure infusion pipe; 121. The first connecting pipe; 122. The first stop flange; 123. The first air valve; 13. The first jet nozzle; 131. The first jet hole; 2. The second pressure liquid supply channel; 21. The second pressure vessel; 211. The second air pressure cavity; 212. The second ventilation hole; 22. The second pressure infusion pipe; 221. The second connecting pipe; 222. The second stop flange; 223. The second air valve; 23. The second jet nozzle; 231. The second jet hole; 3. The forward air duct; 31. The forward air pressure pump; 4. The reverse air duct; 41. The reverse air pressure pump; 5. The normal pressure ventilation pipe; 51. The normal pressure switch; 6. The dual-pressure protection and regulator; 61. The inner lining; 611. The ventilation holes; 62. The expansion sleeve; 7. The particulate liquid; 71. The columnar jet; 8. The fixture; 81. The first support; 82. The second support; 83. The rotor; 830. The clamping groove; 831. The first tubular shaft; 832. The second tubular shaft; 84. The first pressing clamping seat; 85. The second pressing clamping seat; 86. The first compression spring; 87. The second compression spring; 88. The motor; 89. The gear; 9. The wire drawing die; 90. The wire drawing hole; 901. The inner conical surface; 101. The outer conical surface. Specific embodiments

[0029] For the convenience of describing and understanding the present device, first clarify the overall inventive concept of the present application and provide a fixture that can be correspondingly applied to the device claimed in the present application.

[0030] As Figure 6 、 8 shown, the overall inventive concept of the present application is: under pressure, the particulate liquid containing hard particles forms a columnar jet 71 passing through the wire drawing hole, so that the outer peripheral surface of the columnar jet 71 forms an axial friction with the inner wall of the wire drawing hole 90 when passing through the wire drawing hole 90. At the same time, the inner wall of the wire drawing hole 90 rotates on the outer peripheral surface of the columnar jet 71, so that the outer peripheral surface of the columnar jet 71 forms a circumferential friction with the inner wall of the wire drawing hole 90.

[0031] As Figure 10 shown, a fixture that can be correspondingly applied to the device claimed in the present application has a rotor 83 driven by a motor 88. A semi-circular cross-section clamping groove 830 capable of clamping the wire drawing die 9 is provided on the rotor 83. Tubular shafts 831 and 832 with a first through hole and a second through hole are respectively provided at both ends of the rotor 83. The first through hole and the second through hole have the same axis as the wire drawing hole 90 of the clamped wire drawing die 9, and the rotor 83 rotates around the axis of the wire drawing hole 90. The first through hole and the second through hole are provided so that the component forming the columnar jet 71 can extend into and approach both ends of the wire drawing hole 90.

[0032] The fixture 8 also has a first support 81 and a second support 82 fixed on the base. The above-mentioned rotor 83 is rotatably mounted on the first support 81 and the second support 82 through a first tubular shaft 831 and a second tubular shaft 832. A gear 89 for driving the rotor 83 to rotate is provided on the first support 81 or the second support 82. The above-mentioned motor 88 is in a driving relationship with the rotor 83 through the gear 89.

[0033] The left and right ends of the fixture 8 also respectively have a first pressing chuck 84 and a second pressing chuck 85. The first pressing chuck 84 and the second pressing chuck 85 respectively have a first guiding hole and a second guiding hole. The first guiding hole and the second guiding hole are both coaxial with the first through hole and the second through hole.

[0034] It should be noted here that the fixture 8 provided herein is only used to illustrate that the device claimed in the present application can be implemented and applied normally, and it is not the only tool that can be applied to the device claimed in the present application. Therefore, the implementation and application of the device claimed in the present application are not limited to the fixture 8 provided herein.

[0035] The following further describes the present invention in conjunction with embodiments and drawings:

[0036] As Figure 1 、 2As shown in Figures 6, 8, and 9, a micro-particle liquid columnar jet forming device for wire drawing hole grinding includes a pressure liquid supply channel 1 with a jet nozzle 13 and a pressure liquid supply channel 2 with a jet nozzle 23. The jet nozzle 13 and the jet nozzle 23 respectively have a jet hole 131 and a jet hole 231. The pressure liquid supply channel 1 and the pressure liquid supply channel 2 can form a negative pressure with an absolute value greater than the positive pressure on the other side when one side forms a positive pressure. The jet nozzle 13 and the jet nozzle 23 can be respectively docked with both ends of the wire drawing die 9 in a pressing manner, so that the jet hole 131, the wire drawing hole 90, and the jet hole 231 form a temporarily connected linear flow channel. And both the jet hole 131 and the jet hole 231 can spray a columnar jet 71 into the wire drawing hole 90 under the action of positive pressure, and can suck the columnar jet 71 from the wire drawing hole 90 under the action of negative pressure. During application, the jet nozzle 13 and the jet nozzle 23 are docked in a pressing manner at both ends of the wire drawing die 9, so that the jet hole 131 and the jet hole 231 are respectively temporarily connected with the wire drawing hole 90 at both ends of the wire drawing hole 90 to form a coaxial linear flow channel. The wire drawing die rotates around the axis of the wire drawing hole 90 with the fixture 8 rotor 83; the jet hole 131 and the jet hole 231 alternately spray towards the wire drawing hole 90, so that the jet hole 131 sprays the columnar jet 71 under the action of the positive pressure formed in the pressure liquid supply channel 1, and the columnar jet 71 is sucked into the pressure liquid supply channel 2 by the negative pressure formed in the pressure liquid supply channel 2 by the jet hole 231, while the jet hole 231 sprays the columnar jet 71 under the action of the positive pressure formed in the pressure liquid supply channel 2, and the columnar jet 71 is sucked into the pressure liquid supply channel 1 by the negative pressure formed in the pressure liquid supply channel 1 by the jet hole 131. In this way, no matter which direction the columnar jet 71 is sprayed, it is sprayed under the combined action of positive pressure and negative pressure. In particular, the negative pressure with an absolute value greater than the positive pressure can not only reduce the resistance of positive pressure spraying, but also be conducive to stably maintaining the column shape of the columnar jet 71, avoiding spreading and weakening the scouring force under the internal pressure, and at the same time can also avoid the leakage of the micro-particle liquid when the jet hole 131 and the jet hole 231 are not tightly pressed against both ends of the wire drawing hole 90. Here, since the wire drawing die 9 needs to rotate at a high speed (so that the outer peripheral surface of the columnar jet 71 forms a circumferential friction with the inner wall of the wire drawing hole 90), the jet nozzle 13 and the jet nozzle 23 can only be respectively docked with both ends of the wire drawing die 9 in a pressing manner. In this way, in a section of the flow channel where the jet hole 131, the wire drawing hole 90, and the jet hole 231 cannot be fixedly sealed, a relatively complete micro-particle liquid columnar jet is formed under the action of positive and negative pressures, and it can be ensured that the micro-particle liquid does not leak in this section of the flow channel.

[0037] The alternate spraying of the jet hole 131 and the jet hole 231 is conducive to the consistency and thoroughness of the grinding at both ends of the wire drawing hole 90.

[0038] The aperture diameters of the first jet hole 131 and the second jet hole 231 are equal to the aperture diameter of the wire drawing hole 90. In this way, it can not only ensure sufficient flow velocity, but also ensure that its outer peripheral surface can have sufficient contact with the inner wall of the wire drawing hole 90.

[0039] As Figure 2 , 3 , as shown in Figure 4, the first jet nozzle 13 and the second jet nozzle 23 are conical bodies made of wear-resistant materials and having an outer conical surface 101. Correspondingly, both ends of the wire drawing hole 90 are also conical holes having an inner conical surface 901. The inner conical surface 901 of the wire drawing hole 90 has the same taper as the inner conical surfaces of the first jet hole 131 and the second jet hole 231. In this way, they can be closely fitted during pressing and can also rotate relative to each other. The wear-resistant material described here can be a metal-based sulfide or a fluoride self-lubricating wear-resistant material.

[0040] As Figure 2 , 10 , as shown in the figure, a first connecting pipe 121 is provided between the first pressure infusion pipe 12 and the first jet nozzle 13, and a second connecting pipe 221 is provided between the second pressure infusion pipe 22 and the second jet nozzle 23. Stop flanges 122 and 222 that are in threaded fit and can be adjusted forward and backward in position are respectively provided on the outer peripheries of the first connecting pipe 121 and the second connecting pipe 221; compression springs 86 and 87 are respectively sleeved on the outer periphery of the first connecting pipe 121 between the stop flange 122 and the first pressure infusion pipe 12 and on the outer periphery of the second connecting pipe 221 between the stop flange 222 and the second pressure infusion pipe 22. The first jet nozzle 13 and the second jet nozzle 23 are respectively closely pressed against both ends of the wire drawing die 9 by the compression springs 86 and 87 in cooperation with the fixture 8.

[0041] As Figure 2 , 4 , as shown in the figure, is the situation where the first jet nozzle 13 and the second jet nozzle 23 are pressed against the inner conical surfaces 901 of the conical holes at both ends of the wire drawing hole 90 by using the aforementioned fixture 8. The specific method is: the stop flange 122 and the stop flange 222 are respectively screwed into the first connecting pipe 121 and the second connecting pipe 221 in the direction of the clamping groove 830 of the rotor, then the first jet nozzle 13 and the second jet nozzle 23 are withdrawn from the clamping groove 830 of the rotor 83 in the opposite direction, the wire drawing die 9 is placed in the clamping groove 830, the wire drawing die 9 is pressed tightly in the clamping groove 830 by screwing in the bolt pin, and finally the stop flange 122 and the stop flange 222 are respectively rotated back in the first connecting pipe 121 and the second connecting pipe 221, so that the first jet nozzle 13 and the second jet nozzle 23 respectively extend into the conical holes at both ends of the wire drawing hole 90 of the wire drawing die 9, and the inner conical surface 901 is pressed against the outer conical surface 101.

[0042] The first pressure infusion pipe 12 and the second pressure infusion pipe 22 are flexible hoses that can be bent.

[0043] As Figure 1 , 5As shown in the figure, the first pressure supply flow channel 1 includes a first pressure vessel 11 and a first pressure infusion pipe 12 with one end communicating with the first pressure vessel 11 and the other end communicating with a first jet nozzle 13. The second pressure supply flow channel 2 includes a second pressure vessel 21 and a second pressure infusion pipe 22 with one end communicating with the second pressure vessel 21 and the other end communicating with a second jet nozzle 23. Both the first pressure vessel 11 and the second pressure vessel 21 are used to form pressure and contain the particulate liquid 7.

[0044] The upper space and the lower space of the first pressure vessel 11 are respectively a first air pressure cavity 111 and a first liquid storage space for storing the particulate liquid 7, and the upper space and the lower space of the second pressure vessel 21 are respectively a second air pressure cavity 211 and a second liquid storage space for storing the particulate liquid 7. A forward air duct 3 and a reverse air duct 4 are provided between the first air pressure cavity 111 and the second air pressure cavity 211, and a forward air pressure pump 31 and a reverse air pressure pump 41 are respectively provided on the forward air duct 3 and the reverse air duct 4. Under non-operating conditions, the air pressures in the first air pressure cavity 111 and the second air pressure cavity 211 are normal pressures consistent with the external air pressure. Under operating conditions, the first pressure vessel 11 intakes air from the second pressure vessel 21 to form a positive pressure, so that the second pressure vessel 21 forms a negative pressure, and a columnar liquid flow is ejected from the first jet hole 131; the second pressure vessel 21 intakes air from the first pressure vessel 11 to form a positive pressure, so that the first pressure vessel 11 forms a negative pressure, and a columnar liquid flow is ejected from the second jet hole 231. In this way, only by turning on the forward air pressure pump 31 or the reverse air pressure pump 41 can the first pressure vessel 11 and the second pressure vessel 21 form a positive pressure and a negative pressure respectively at the same time.

[0045] Normal pressure vent pipes 5 communicating with the outside and the first air pressure cavity 111 and the second air pressure cavity 211 are respectively provided on the first pressure vessel 11 and the second pressure vessel 21, and a normal pressure switch 51 capable of being closed under operating conditions is provided on the normal pressure vent pipe 5. The above-mentioned step of making the air pressures in the first air pressure cavity 111 and the second air pressure cavity 211 be normal pressures consistent with the external air pressure under non-operating conditions is achieved by opening the normal pressure switch 51.

[0046] Such as Figure 5 、 6As shown in FIGS. 7 and 9, a dual-pressure protection regulator 6 for maintaining negative pressure and regulating positive pressure is provided on pressure vessel 11 and pressure vessel 21. The dual-pressure protection regulator 6 includes a rigid inner liner 61 having air-permeable holes 611 and an elastic expansion sleeve 62 sleeved outside the inner liner 61. An air vent hole 112 is provided at the top of pressure vessel 11 and an air vent hole 212 is provided at the top of pressure vessel 21. The air vent hole 112 and the air vent hole 212 communicate with an air pressure cavity 111 and an air pressure cavity 211 respectively. The sleeve mouths of the expansion sleeve 62 provided on pressure vessel 11 and the sleeve mouths of the expansion sleeve 62 provided on pressure vessel 21 are respectively sealed and bonded to the edges of the orifices of the air vent hole 112 and the air vent hole 212. When a positive pressure is formed in the cavity of the expansion sleeve 62, the expansion sleeve 62 is expanded. When a negative pressure is formed in the cavity of the expansion sleeve 62, the contraction of the expansion sleeve 62 is restricted by the inner liner 61.

[0047] The purpose of the above setting is that in pressure vessel 11 and pressure vessel 21, the absolute value of the negative pressure formed by one party is greater than the absolute value of the positive pressure formed by the other party. In this way, under working conditions, from jet hole 131 through wire drawing hole 90 to jet hole 231 are all in a negative pressure state, further ensuring that the particulate liquid flowing at high speed therein will not flow out between the outer conical surface 101 and the inner conical surface 901.

[0048] As Figure 6 、 7 shown, during the application process, when the forward air pump 31 is turned on, pressure vessel 11 intakes air from pressure vessel 21 to form a positive pressure, causing pressure vessel 21 to form a negative pressure. Due to the restriction of the inner liner 61 on the expansion sleeve 62 of the dual-pressure protection regulator 6 of the pressure vessel 21 with a negative pressure formed, the expansion sleeve 62 cannot shrink, so that the gas in the air pressure cavity 211 rapidly decreases, and the negative pressure can be increased normally. At the same time, since part of the gas entering pressure vessel 11 enters the expansion sleeve 62 and expands the expansion sleeve 62, the increase in the positive pressure of the air pressure in the air pressure cavity 111 is reduced, thereby realizing that the absolute value of the negative pressure in pressure vessel 21 is greater than the absolute value of the positive pressure in pressure vessel 11.

[0049] As Figure 9 shown, similarly, when the reverse air pump 41 is turned on, pressure vessel 21 intakes air from pressure vessel 11 to form a positive pressure, causing pressure vessel 11 to form a negative pressure. Due to the restriction of the inner liner 61 on the expansion sleeve 62 of the dual-pressure protection regulator 6 of the pressure vessel 11 with a negative pressure formed, the expansion sleeve 62 cannot shrink, so that the gas in the air pressure cavity 111 rapidly decreases, and the negative pressure can be increased normally. At the same time, since part of the gas entering pressure vessel 21 enters the expansion sleeve 62 and expands the expansion sleeve 62, the increase in the positive pressure of the air pressure in the air pressure cavity 211 is reduced, thereby realizing that the absolute value of the negative pressure in pressure vessel 11 is greater than the absolute value of the positive pressure in pressure vessel 21.

[0050] An air valve I (123) and an air valve II (223) are respectively arranged on the pressure infusion pipe I (12) and the pressure infusion pipe II (22). Preferably, when the columnar jet starts to be ejected, the air valve on the negative pressure side opens first, and the air valve on the positive pressure side opens later.

[0051] For example, when the pressure vessel I (11) is under positive pressure and the pressure vessel II (21) is under negative pressure at the start of ejection, the air valve II (223) opens first and the air valve I (123) opens later. When the pressure vessel I (11) is under negative pressure and the pressure vessel II (21) is under positive pressure, the air valve I (123) opens first and the air valve II (223) opens later. In this way, a negative pressure is formed in the flow channel from the jet hole I (131), through the wire drawing hole (90) to the jet hole II (231) before the columnar jet (71) starts to be ejected, so that the joint between the outer conical surface (101) and the inner conical surface (901) of this section of the flow channel does not leak the particulate liquid (7) outward at the start of ejection.

[0052] The above embodiments are only used to illustrate the present invention and cannot be used to limit the protection scope covered by the present invention. Any improvement or modification made without departing from the principle of the present invention should be regarded as falling within the protection scope of the present invention.

Claims

1. A particulate liquid columnar jet forming device for wire drawing hole grinding, characterized in that: It includes a first pressure supply flow channel (1) with a jet nozzle one (13) and a second pressure supply flow channel (2) with a jet nozzle two (23). The jet nozzle one (13) and the jet nozzle two (23) respectively have a jet hole one (131) and a jet hole two (231). When a positive pressure is formed on one side, the first pressure supply flow channel (1) and the second pressure supply flow channel (2) can form a negative pressure with an absolute value greater than the positive pressure on the other side. The jet nozzle one (13) and the jet nozzle two (23) can be butted against both ends of a wire drawing die (9) in a pressing manner, so that the jet hole one (131), the wire drawing hole (90), and the jet hole two (231) form a temporarily connected linear flow channel. And both the jet hole one (131) and the jet hole two (231) can spray a columnar jet (71) into the wire drawing hole (90) under the action of positive pressure and can suck the columnar jet (71) from the wire drawing hole (90) under the action of negative pressure.

2. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 1, characterized in that: The first pressure supply flow channel (1) includes a first pressure vessel (11) and a first pressure infusion pipe (12) with one end connected to the first pressure vessel (11) and the other end connected to the jet nozzle one (13). The second pressure supply flow channel (2) includes a second pressure vessel (21) and a second pressure infusion pipe (22) with one end connected to the second pressure vessel (21) and the other end connected to the jet nozzle two (23).

3. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 1, wherein: The apertures of the jet hole one (131) and the jet hole two (231) are equal to the aperture of the wire drawing hole (90).

4. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 2, characterized in that: The jet nozzle one (13) and the jet nozzle two (23) are conical bodies made of wear-resistant materials with an outer conical surface (101).

5. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 1 or 2, characterized in that: The upper space and the lower space of the first pressure vessel (11) are respectively a first air pressure cavity (111) and a first liquid storage space for storing the particulate liquid (7). The upper space and the lower space of the second pressure vessel (21) are respectively a second air pressure cavity (211) and a second liquid storage space for storing the particulate liquid (7).

6. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 5, characterized in that: A forward air duct (3) and a reverse air duct (4) are arranged between the first air pressure cavity (111) and the second air pressure cavity (211). A forward air pressure pump (31) and a reverse air pressure pump (41) are respectively arranged on the forward air duct (3) and the reverse air duct (4).

7. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 5, characterized in that: Normal pressure ventilation pipes (5) connecting the outside to the first air pressure cavity (111) and the second air pressure cavity (211) are respectively arranged on the first pressure vessel (11) and the second pressure vessel (21). A normal pressure switch (51) that can be closed under working conditions is arranged on the normal pressure ventilation pipe (5).

8. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 6, characterized in that: A dual-pressure protection regulator (6) for maintaining negative pressure and positive pressure is provided on pressure vessel one (11) and pressure vessel two (21). The dual-pressure protection regulator (6) includes a rigid inner lining body (61) having air-permeable holes (611) and an elastic expansion sleeve (62) sleeved outside the inner lining body (61). Air vent one (112) and air vent two (212) are respectively provided at the tops of pressure vessel one (11) and pressure vessel two (21). Air vent one (112) and air vent two (212) are respectively communicated with air pressure cavity one (111) and air pressure cavity two (211). The sleeve openings of the expansion sleeve (62) provided on pressure vessel one (11) and the sleeve openings of the expansion sleeve (62) provided on pressure vessel two (21) are respectively sealed and bonded to the edges of the orifices of air vent one (112) and air vent two (212). When positive pressure is formed in the inner cavity of the expansion sleeve (62), the expansion sleeve (62) is enlarged. When negative pressure is formed in the inner cavity of the expansion sleeve (62), the contraction of the expansion sleeve (62) is restricted by the inner lining body (61).

9. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 8, characterized in that: Air valve one (123) and air valve two (223) are respectively provided on pressure infusion tube one (12) and pressure infusion tube two (22). At the start of columnar jet injection, the air valve on the negative pressure side opens first, and the air valve on the positive pressure side opens later.

10. The particulate liquid columnar jet forming device for wire drawing hole grinding according to claim 4, characterized in that: Connecting tube one (121) is provided between pressure infusion tube one (12) and jet nozzle one (13), and connecting tube two (221) is provided between pressure infusion tube two (22) and jet nozzle two (23). Stop flanges one (122) and stop flanges two (222) with threaded fit for adjusting the position back and forth are respectively provided on the outer peripheries of connecting tube one (121) and connecting tube two (221). Compression springs one (86) and compression springs two (87) are respectively sleeved on the outer peripheries of connecting tube one (121) between stop flange one (122) and pressure infusion tube one (12) and on the outer peripheries of connecting tube two (221) between stop flange two (222) and pressure infusion tube two (22). The jet nozzle one (13) and the jet nozzle two (23) are respectively tightly pressed against both ends of the wire drawing die (9) by the compression springs one (86) and compression springs two (87) through cooperation with the fixture (8).

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