Automatic spray type freeze trimming machine for powder metallurgy parts

Abstract

The utility model belongs to the deburring equipment technical field, concretely relates to a kind of powder metallurgy parts automatic jet type frozen trimming machine, including cabinet and the part bracket and shot blasting assembly of installation in box body, the upper portion of the box body is equipped with liquid nitrogen gas pipe, the upper portion of the box body is also equipped with negative pressure dust extraction pipe;First shunt box, negative pressure pump and second shunt box are sequentially equipped on the negative pressure dust extraction pipe, the outlet end of the negative pressure dust extraction pipe is connected with cyclone separator, the first shunt box and second shunt box are equipped with baffle for blocking solid particles;The part bracket includes storage disc, the storage disc is rotatably arranged in the cabinet, the storage disc is evenly distributed with a plurality of mounting units for placing parts, each mounting unit can rotate relative to the storage disc.The part bracket that can revolve and rotate of being provided with negative pressure dust extraction system at the same time, improve trimming quality and efficiency, solve the dust problem when trimming simultaneously.

Description

Technical Field

[0001] This utility model belongs to the technical field of burr removal equipment, and specifically relates to an automatic spray-type cryogenic trimming machine for powder metallurgy parts. Background Technology

[0002] Cryogenic trimming machines utilize the low-temperature freezing effect of liquid nitrogen to embrittle products made of materials such as rubber, plastics, and zinc-magnesium-aluminum alloys. Since the burrs (or flash) embrittle faster than the product itself, high-speed jets of polymer particles (i.e., projectiles) are used to impact the burrs during the time difference between burr embrittlement and product embrittlement. This efficiently and precisely removes the burrs without altering the product's physicochemical properties.

[0003] During operation, cryogenic trimming machines generate a large amount of metal shavings, scale, and abrasive dust by rapidly impacting the workpiece surface with abrasives (such as silica sand and steel shot). This is especially problematic for powder metallurgy parts. If dust accumulates inside the chamber and adheres to the chamber walls, nozzles, and transmission components, it accelerates equipment wear. Dust also settles on unfinished workpiece surfaces, affecting trimming quality. Furthermore, existing cryogenic trimming machines place parts in a metal basket and rotate the basket to reposition them. However, for small parts, this can lead to accumulation in the basket, preventing some parts from being trimmed. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides an automatic spray-type cryogenic trimming machine for powder metallurgy parts, which is equipped with a negative pressure dust collection system and a part bracket that allows the parts to rotate and revolve, thereby improving the trimming quality and efficiency.

[0005] Technical solution: In order to achieve the above objectives, this utility model provides an automatic shot blasting and cryogenic trimming machine for powder metallurgy parts, including a machine housing and a parts bracket and shot blasting assembly installed in the machine housing. The upper part of the machine housing is provided with a liquid nitrogen gas pipe, and the upper part of the machine housing is also provided with a negative pressure dust suction pipe.

[0006] The negative pressure suction pipe is provided with a first diversion box, a negative pressure pump and a second diversion box in sequence. The outlet end of the negative pressure suction pipe is connected to a cyclone separator. The first diversion box and the second diversion box are provided with baffles for blocking solid particles.

[0007] The parts holder includes a storage disc, which is rotatably mounted in the chassis. The storage disc has multiple mounting units evenly distributed on it for placing parts, and each mounting unit can rotate relative to the storage disc.

[0008] When using this cryogenic trimming machine, metal shavings, oxide scale, and abrasive dust are promptly removed from the machine casing via a negative pressure suction pipe. The gas containing waste materials undergoes preliminary separation and sedimentation in the first and second diversion boxes, and then passes through a cyclone separator to further separate the dust and gas in the waste materials, balancing the air pressure inside the machine casing. Liquid nitrogen is introduced into the machine casing through a liquid nitrogen pipe to reach the required temperature. The parts are placed on the storage disc and can rotate with the storage disc while also rotating relative to it. The shot peening assembly sprays shot onto the parts to remove burrs.

[0009] Furthermore, the first diversion box is connected to the chassis and the negative pressure pump at both ends, respectively. The first diversion box is provided with a first diversion plate. The upper part of the first diversion plate is inclined, the middle part is vertical, and the lower part extends horizontally to one side of the chassis. After the dust-laden gas enters the first diversion box, the larger particles of impurities are blocked by the first diversion plate under its action.

[0010] The second diversion box is connected to the negative pressure pump and the external cyclone separator on its side and top, respectively. The second diversion box is provided with a second diversion plate and a third diversion plate. The second diversion plate is inclined on the side near the negative pressure pump and extends downward at its tail. The third diversion plate is located at the top of the second diversion box and is horizontally arranged. When the dust-laden gas passes through the second diversion box, the waste in the gas is further separated under the action of the second diversion plate and the third diversion plate.

[0011] Furthermore, both the first and second diversion boxes are equipped with chip discharge ports at their bottoms, through which waste materials in the first and second diversion boxes can be periodically discharged.

[0012] Furthermore, the center of the storage disc is connected to a revolution motor via a drive shaft. The revolution motor is located on the top of the chassis. Each mounting unit includes a bearing, a mounting shaft that rotates within the bearing, a gear located at the bottom of the mounting shaft, and a drive gear. The drive gear is connected to a self-rotating motor via a drive shaft. The self-rotating motor is located on the top of the chassis. The drive gears are connected to each other via a chain.

[0013] Furthermore, the shot peening assembly includes a mounting bracket, multiple shot peening guns mounted on the mounting bracket, and an adjustment mechanism mounted on the mounting bracket for adjusting the angle of the shot peening guns.

[0014] The adjustment mechanism includes an adjustment motor located on the side of the chassis, a disc connected to the output shaft of the adjustment motor, and a connecting shaft eccentrically arranged on the disc;

[0015] A set of rotating rods is provided horizontally on the mounting bracket, and several mounting rods are provided on the rotating rods. The shot peening gun is mounted on the mounting rods, and the ends of the upper and lower rotating rods are connected by a connecting rod.

[0016] The connecting shaft is connected to the end of the upper rotating rod via a connecting rod. The shot peening gun's spray angle can be adjusted through an adjustment mechanism, allowing the spray angle to cover all positions of the workpiece and improve the trimming effect.

[0017] Furthermore, the bottom surface of the machine casing is funnel-shaped and contains a screen. A shot collection box is located at the bottom of the machine casing, and the shot collection box is connected to the shot peening assembly.

[0018] Furthermore, the chassis has a front door and a side door on the front and side respectively, and the front door has a transparent observation window.

[0019] Furthermore, the chassis is also equipped with a control panel for controlling the entire device.

[0020] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0021] 1. This utility model provides an automatic spray-type cryogenic trimming machine for powder metallurgy parts, equipped with a negative pressure dust suction pipe. The powder is initially separated from the gas through a first and second diversion box, and then further separated by a cyclone separator. The negative pressure dust suction pipe can promptly remove dust and debris, purifying the working environment and preventing dust from spreading to the operating area, reducing the health risk of operators inhaling dust, while meeting workshop environmental protection and occupational health standards. It maintains cleanliness inside the chamber, extends equipment life, and ensures the stability of workpiece processing quality. The negative pressure dust suction pipe can also balance the high pressure inside the machine casing brought about by the shot blasting gun, forming an airflow circulation of "air intake → sandblasting → dust extraction," preventing dust leakage caused by excessive air pressure. Stable air pressure ensures uniform abrasive impact force.

[0022] 2. The parts bracket in this utility model can be installed in different ways according to the different types of parts. The parts can revolve with the storage disc on the parts bracket, and can also rotate with the mounting shaft. Combined with the shot peening component with adjustable spray angle, it effectively avoids the defect of uneven trimming effect caused by the accumulation of parts in the container. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an automatic spray-type cryogenic trimming machine for powder metallurgy parts according to the present invention;

[0024] Figure 2 This is a front view of an automatic spray-type cryogenic trimming machine for powder metallurgy parts according to the present invention.

[0025] Figure 3 This is a rear view of an automatic spray-type cryogenic trimming machine for powder metallurgy parts according to the present invention.

[0026] Figure 4 This is a side view of an automatic spray-type cryogenic trimming machine for powder metallurgy parts according to the present invention.

[0027] Figure 5 This is a cross-sectional view of the first shunt box described in this utility model;

[0028] Figure 6 This is a cross-sectional view of the second shunt box described in this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the parts bracket described in this utility model;

[0030] Figure 8 This is a schematic diagram of the shot peening assembly described in this utility model.

[0031] In the diagram: 1-Chassis, 11-Front door, 12-Side door, 13-Control panel, 14-Mounting block, 2-Parts bracket, 21-Disposal disc, 22-Mounting unit, 221-Bearing, 222-Mounting shaft, 223-Gear, 224-Drive gear, 225-Rotating motor, 226-Chain, 23-Revolutionary motor, 3-Shot peening assembly, 31-Mounting bracket, 32-Shot peening gun, 33-Adjusting motor, 34-Disc, 35-Rotating rod, 36-Mounting rod, 4-Liquid nitrogen pipe, 5-Negative pressure suction pipe, 6-First diversion box, 61-First diversion plate, 7-Negative pressure pump, 8-Second diversion box, 81-Second diversion plate, 82-Third diversion plate, 9-Shot collection box. Detailed Implementation

[0032] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] like Figure 1-4 As shown: An automatic shot blasting and cryogenic trimming machine for powder metallurgy parts, characterized in that it includes a machine housing 1 and a parts bracket 2 and a shot blasting assembly 3 installed in the machine housing 1. The upper part of the machine housing 1 is provided with a liquid nitrogen pipe 4, and the upper part of the machine housing 1 is also provided with a negative pressure dust suction pipe 5.

[0034] The negative pressure suction pipe 5 is provided with a first diversion box 6, a negative pressure pump 7 and a second diversion box 8 in sequence. The outlet end of the negative pressure suction pipe 5 is connected to a cyclone separator. The first diversion box 6 and the second diversion box 8 are provided with baffles for blocking solid particles.

[0035] The parts holder 2 includes a storage disc 21, which is rotatably disposed in the housing 1. The storage disc 21 has a plurality of mounting units 22 for placing parts evenly distributed on it, and each mounting unit 22 can rotate relative to the storage disc 21.

[0036] like Figure 5-6 The first diversion box 6 is connected to the chassis 1 and the negative pressure pump 7 at both ends respectively. The first diversion box 6 is provided with a first diversion plate 61. The upper part of the first diversion plate 61 is inclined, the middle part is vertical, and the lower part extends horizontally to one side of the chassis 1.

[0037] The second diversion box 8 is connected to the negative pressure pump 7 and the external cyclone separator on its side and top, respectively. The second diversion box 8 is provided with a second diversion plate 81 and a third diversion plate 82. The second diversion plate 81 is inclined on the side near the negative pressure pump 7 and its tail extends downward and is inclined. The third diversion plate 82 is located on the top of the second diversion box 8 and is horizontally arranged.

[0038] The bottom of the first diversion box 6 and the second diversion box 8 are both provided with chip discharge ports, and the chip discharge ports are equipped with manual valves. Opening the manual valves can discharge the fixed waste materials collected in the boxes.

[0039] like Figure 7 As shown, the center of the storage disc 21 is connected to a revolution motor 23 via a drive shaft. The revolution motor 23 is located on the top of the housing 1. Each mounting unit 22 includes a bearing 221, a mounting shaft 222 rotatably disposed within the bearing 221, a gear 223 located at the bottom of the mounting shaft 222, and a drive gear 224. The drive gear 224 is connected to a self-rotating motor 225 via a drive shaft. The self-rotating motor 225 is located on the top of the housing 1. The drive gear 224 and the gear 223 are connected by a chain 226. Depending on the shape and size of the parts, they are placed on the mounting units in different ways. For example, smaller parts can be placed in a conventional metal basket, which is then mounted on the mounting shaft 222. The revolution motor 23 drives the storage tray 21 to rotate via the transmission shaft, thereby allowing the parts to be rotated. Simultaneously, the rotation motor 225 drives the metal basket containing the parts to rotate, thus preventing parts from stacking in the metal basket and some parts from being incompletely trimmed. For parts with regular shapes and larger volumes, a rotatable mounting plate can be provided on the top of the chassis 1. The mounting plate has mounting blocks 14 with mounting holes (such as...). Figure 4 As shown, the two ends of the rod-shaped component with hooks are respectively mounted on the mounting shaft 222 and the mounting block 14, and the parts are hung on the hooks.

[0040] like Figure 8 As shown, the shot peening assembly 3 includes a mounting bracket 31, multiple shot peening guns 32 mounted on the mounting bracket 31, and an adjustment mechanism mounted on the mounting bracket 31 for adjusting the angle of the shot peening guns 32.

[0041] The adjustment mechanism includes an adjustment motor 33 located on the side of the chassis 1, a disc 34 connected to the output shaft of the adjustment motor 33, and a connecting shaft eccentrically arranged on the disc 34;

[0042] A set of rotating rods 35 are arranged horizontally on the mounting bracket 31. Several mounting rods 36 are provided on the rotating rods 35. The shot peening gun 32 is mounted on the mounting rods 36. The ends of the upper and lower rotating rods 35 are connected by a connecting rod.

[0043] The connecting shaft is connected to the end of the upper rotating rod 35 via a connecting rod. The pitch angle of the shot peening gun 32 can be adjusted by adjusting the motor 33. The adjusting motor 33 drives the disc 34 to rotate, and the eccentrically set connecting shaft on the disc 34 drives the connecting rod to rotate the rotating rod 35. The rotating rod drives the mounting rod 36 and the shot peening gun 32 to rotate. At the same time, the upper rotating rod 35 rotates, and the lower rotating rod 25 rotates synchronously through the connecting rod.

[0044] Specifically, the bottom of the casing 1 is funnel-shaped and contains a screen. A shot collection box 9 is located at the bottom of the casing and is connected to the shot peening assembly 3. After impact, the shot is collected by the shot collection box 9 and then sent to the shot peening gun 32 for recycling. Larger, reusable abrasive particles are filtered through the screen and remain in the casing 1 for continued circulation. Fine dust and broken abrasive debris are drawn away by the negative pressure suction pipe 5, preventing inferior abrasive from entering the circulation system, ensuring uniform abrasive particle size, and improving sandblasting efficiency.

[0045] Specifically, the chassis 1 has a front door 11 and a side door 12 on its front and side, respectively, and the front door 11 has a transparent observation window.

[0046] Specifically, the chassis 1 is also equipped with a control panel 13 for controlling the entire device.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An automatic spray-type cryogenic trimming machine for powder metallurgy parts, characterized in that, Includes a chassis (1) and a parts bracket (2) and a shot peening assembly (3) installed in the chassis (1). The upper part of the chassis (1) is provided with a liquid nitrogen pipe (4) and a negative pressure dust suction pipe (5). The negative pressure suction pipe (5) is provided with a first diversion box (6), a negative pressure pump (7), and a second diversion box (8) in sequence. The outlet end of the negative pressure suction pipe (5) is connected to a cyclone separator. The first diversion box (6) and the second diversion box (8) are provided with baffles for blocking solid particles. The parts holder (2) includes a storage disc (21), which is rotatably disposed in the chassis (1). The storage disc (21) has a plurality of mounting units (22) for placing parts evenly distributed on it, and each mounting unit (22) can rotate relative to the storage disc (21).

2. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 1, characterized in that, The first diversion box (6) is connected to the chassis (1) and the negative pressure pump (7) at both ends respectively. The first diversion box (6) is provided with a first diversion plate (61). The upper part of the first diversion plate (61) is inclined, the middle part is vertical, and the lower part extends horizontally to one side of the chassis (1). The second diversion box (8) is connected to the negative pressure pump (7) and the external cyclone separator on its side and top, respectively. The second diversion box (8) is provided with a second diversion plate (81) and a third diversion plate (82). The second diversion plate (81) is inclined on the side near the negative pressure pump (7) and its tail extends downward. The third diversion plate (82) is located on the top of the second diversion box (8) and is horizontally arranged.

3. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 2, characterized in that, Both the first flow divider box (6) and the second flow divider box (8) are provided with chip discharge ports at their bottoms.

4. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 1, characterized in that, The center of the storage disc (21) is connected to a revolution motor (23) via a drive shaft. The revolution motor (23) is located on the top of the housing (1). Each mounting unit (22) includes a bearing (221), a mounting shaft (222) located in the bearing (221), a gear (223) located at the bottom of the mounting shaft (222), and a drive gear (224). The drive gear (224) is connected to a self-rotating motor (225) via a drive shaft. The self-rotating motor (225) is located on the top of the housing (1). The drive gear (224) and the gear (223) are connected by a chain (226).

5. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 1, characterized in that, The shot peening assembly (3) includes a mounting bracket (31), multiple shot peening guns (32) mounted on the mounting bracket (31), and an adjustment mechanism mounted on the mounting bracket (31) for adjusting the angle of the shot peening guns (32). The adjustment mechanism includes an adjustment motor (33) located on the side of the chassis (1), and a disc (34) connected to the output shaft of the adjustment motor (33). A connecting shaft is eccentrically arranged on the disc (34). A set of rotating rods (35) are provided horizontally on the mounting bracket (31), and several mounting rods (36) are provided on the rotating rods (35). The shot blasting gun (32) is mounted on the mounting rods (36), and the ends of the upper and lower rotating rods (35) are connected by a connecting rod. The connecting shaft is connected to the end of the upper rotating rod (35) via a connecting rod.

6. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 1, characterized in that, The bottom surface of the casing (1) is funnel-shaped and is equipped with a screen. The bottom of the casing (1) is equipped with a shot collection box (9), which is connected to the shot peening assembly (3).

7. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 1, characterized in that, The chassis (1) has a front door (11) and a side door (12) on its front and side, respectively, and the front door (11) has a transparent observation window.

8. The automatic spray-type cryogenic trimming machine for powder metallurgy parts according to claim 1, characterized in that, The chassis (1) is also equipped with a control panel (13) for controlling the entire device.

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