Deep hole surfacing and boring repair device for injection molding and extrusion screw cylinder
By designing deep hole surfacing and boring repair devices for injection molding and extrusion screw barrels, the precise control of rotary servo motors and feed stepping servo motors, combined with CO2 gas protection welding and the 180° cutter head design of boring tool bars, the problem of repair difficulty after wear of the inner holes of the screw barrel is solved, and efficient repair and cost savings of the screw barrels are achieved.
Patent Information
- Application Number
- CN202421616150.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The deep hole processing technology of injection molding machines and extruders has high requirements, high accuracy and complex structure, which leads to the difficulty of repairing the inner holes of the screw barrel after wear. It is routinely scrapped, which is costly and not environmentally friendly.
A deep hole surfacing and boring repair device for injection molding and extrusion screw barrels is designed, including a screw barrel, a control mechanism, an inner hole surfacing mechanism and a boring processing mechanism. The rotary servo motor and the feed stepping servo motor are used for precise control, and combined with CO2 gas protection welding and the 180° cutter head design of the boring rod, the repair of the inner hole of the screw barrel is achieved.
Through surfacing and boring processing, the wear problem in the screw barrel is solved at one time, which saves the huge cost of scrapping and replacement, realizes efficient repair of the screw barrel, and reduces production costs and time-efficiency costs.
Smart Images
Figure CN222767661U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molding extruders, in particular to an injection molding and extrusion screw barrel deep hole surfacing and boring processing repair device. Background Art
[0002] The deep hole processing technology of injection molding machines and extruder barrels requires high technology, high precision, and complex structure. They are vulnerable key components in the plastic injection molding and extrusion processing industry. They play an extremely important role in the quality of processed products. The cost of complete sets of parts is high, the cost of replacing the whole set is high, and the repair is difficult, especially after the inner hole of the barrel is worn, it is difficult to repair. Conventionally, it is generally scrapped, or the inner hole is enlarged by boring, and then the inner hole is nitrided, and a new screw is made. After the repair, the original barrel is enlarged, and a new set of enlarged new screws is made, or the original barrel is enlarged and inlaid with alloy sleeves to reach the original barrel screw size. The repair process is complicated and requires large-scale processing equipment and technology. The cost is not much different from that of a newly processed barrel screw. For the manufacturer, the cost of replacing the whole set is not much different. It is usually scrapped and cannot be recycled, saving costs and production time. Utility Model Content
[0003] The technical solution adopted by the utility model to solve the above technical problems is:
[0004] The deep hole surfacing and boring repair device for injection molding and extrusion screw barrels comprises a screw barrel, a control mechanism, an inner hole surfacing mechanism and a boring mechanism. Boring welding connection devices are installed at both ends of the screw barrel. The control mechanism comprises a rotary servo motor fixedly installed at one end of the boring welding connection device, a feed step servo motor installed at one side of the rotary servo motor and a feed screw arranged in the feed step servo motor. A feed elastic sleeve is detachably installed on the feed screw, and one end of the feed elastic sleeve has a variable sleeve. The rotary servo motor and the feed step servo motor are both connected to a servo controller through a line. By adopting servo control, the working control and the feed speed adjustment range can be more accurate and timely.
[0005] The inner hole surfacing mechanism comprises a welding rod, which is sleeved in a feed elastic sleeve by a variable sleeve and extends into a screw barrel through a rotary servo motor, one end of the welding rod has a curved arc-shaped welding head, the welding rod is a CO2 gas shielded welding rod, and a CO2 shielded welding device is arranged at the other end of the welding rod, and the CO2 shielded welding device controls the start and stop of the welding head;
[0006] The boring mechanism includes a boring bar, which is sleeved in a feed elastic sleeve by a variable sleeve and extends into the screw barrel through a rotary servo motor. A right support portion is provided at the end of the screw barrel away from the operation. More than two groups of tool mounting holes are spaced apart on the boring bar, and each group has two 180 O The tool mounting holes are arranged opposite to each other, and the tool heads are installed in the tool mounting holes. The layout of multiple sets of tool heads and the double tool head circumference are 180O The layout can effectively eliminate the radial runout of the boring bar, improve the processing accuracy, and replace reaming with boring, which effectively solves the problem of low one-time processing depth of the reamer.
[0007] When the feed elastic sleeve and the variable sleeve are clamped to the welding rod or the boring bar, the rotary servo motor stops working.
[0008] Preferably, the angle formed between the arc portion of the welding head and the welding rod is 90 O —150 O .
[0009] Preferably, the inner hole surfacing mechanism also includes an exhaust device arranged at the end of the barrel away from the operation, which effectively solves the problem of deep hole welding affecting the weld quality due to welding gas accumulation.
[0010] Preferably, the servo controller and the CO2 shielded welding device are both connected to a digital operation interface panel, and the digital operation interface panel issues work instructions to the CO2 shielded welding device and the servo controller.
[0011] Preferably, a polyurethane hose with an outer diameter of 6mm-8mm is fixedly installed in a spiral manner on the boring bar of the boring machining mechanism to form a spiral cutting device.
[0012] Preferably, an air jet is installed at the position of the tool head of the boring mechanism. The air jet is a polyurethane hose with an outer diameter of 6mm-8mm. The spiral, gas impact and gravity cutting methods are used to effectively solve the problem of difficult cutting in deep hole boring.
[0013] Preferably, a lubricating coolant pipe is installed on the boring bar of the boring mechanism, and the lubricating coolant pipe is a polyurethane hose with an outer diameter of 6mm-8mm. The jet pipe and the lubricating coolant pipe do not affect the cutting of the spiral cutting device.
[0014] Preferably, when the feed elastic sleeve and the variable sleeve are loose with respect to the welding rod or the boring bar, the feed step servo motor does not work.
[0015] The beneficial effects of the utility model are: the use of surfacing and boring processing can effectively solve the wear problem in the barrel at one time, saving the huge cost of scrapping and replacing the barrel screw with a new one, as well as the time-effectiveness cost of output efficiency caused by equipment scrapping. The deep hole surfacing and boring repair device for the inner hole wear of the injection molding and extrusion barrel can be repaired by the production unit by itself without returning to the factory for expensive repairs or scrapping. The cost of this repair equipment is low, the technology is simple and easy to learn, and the control accuracy is high. The use of separate control of rotation and stepping can realize circular welding and boring processing as well as linear welding and feeding, which perfectly meets the requirements of repair processing. The use of CO2 gas shielded welding can ensure the quality of welding, and the 180 degree boring tool head of the boring tool can ensure the quality of welding. OThe design effectively ensures the machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the surfacing structure of the utility model;
[0017] Figure 2 It is a schematic diagram of the boring processing structure of the utility model.
[0018] As shown in the figure: 1. welding rod; 2. feed screw; 3. feed elastic sleeve; 4. rotation servo motor; 5. feed step servo motor; 6. servo power data line; 7. boring and welding connection device; 8. welding head; 9. screw barrel; 10. right support part; 11. variable sleeve; 12. control data line; 13. exhaust device; 14. boring tool rod; 15. tool mounting hole; 16. spiral cutting device. DETAILED DESCRIPTION
[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0020] The invention discloses a deep hole surfacing and boring repair device for injection molding and extrusion screw barrels, comprising a screw barrel 9, a control mechanism, an inner hole surfacing mechanism and a boring mechanism.
[0021] like Figure 1 As shown, when the inner hole of the screw barrel 9 is worn, the worn part is firstly built-up welded to fill the wear amount, and boring welding connection devices 7 are installed at both ends of the screw barrel 9.
[0022] The control mechanism includes a rotary servo motor 4 fixedly mounted on one end of the boring and welding connection device 7, a feed stepping servo motor 5 mounted on one side of the rotary servo motor 4, and a feed screw 2 arranged in the feed stepping servo motor 5, a feed elastic sleeve 3 is detachably mounted on the feed screw 2, one end of the feed elastic sleeve 3 has a variable sleeve 11, and the rotary servo motor 4 and the feed stepping servo motor 5 are both connected to the servo controller through a line.
[0023] The inner hole surfacing mechanism includes a welding rod 1, which is sleeved in a feed elastic sleeve 3 by a deformed sleeve 11. The welding rod 1 passes through a rotary servo motor 4 and is connected and installed with a screw barrel 9 through a boring welding connection device 7 and extends into the screw barrel 9. One end of the welding rod 1 has a welding head 8, which is in an arc shape. Such a welding head 8 can realize circumferential welding and linear welding in the screw barrel 9. The angle formed between the arc portion and the welding rod 1 is preferably 90 O Up to 150 O between.
[0024] The welding method of cladding is CO2 gas shielded welding. During the welding process, CO2 gas is sprayed into the welding area to form a protective atmosphere to prevent oxygen and nitrogen in the air from oxidizing and nitriding the molten metal, thereby ensuring the quality of welding. At the same time, CO2 gas can also play a cooling role, which helps to control the welding temperature and prevent overheating of the welding area. Therefore, the welding rod 1 is a CO2 gas shielded welding rod, and a CO2 shielded welding device is provided at the other end of the welding rod 1. The CO2 shielded welding device controls the start and stop of the welding head 8 to perform circular welding or linear welding.
[0025] When the welding rod 1 is loosened by using the variable sleeve 11 and the feed elastic sleeve 3, the welding rod 1 will not be affected by the feed elastic sleeve 3, and is driven by the rotary servo motor 4 to rotate forward and reverse, and at the same time, the welding head 8 is started to perform circular welding on the screw barrel 9. When the variable sleeve 11 and the feed elastic sleeve 3 clamp the welding rod 1, the feed stepping servo motor 5 drives the feed screw 2, and the feed screw 2 drives the welding rod 1 to feed through the feed elastic sleeve 3. At this time, the rotary servo motor 4 is not started, but the welding head 8 can be started to perform linear welding on the screw barrel 9.
[0026] An exhaust device 13 is provided at the end of the screw barrel 9 away from the operation. Opening the exhaust device 13 during welding can effectively solve the problem of welding gas accumulation affecting the weld quality during deep hole welding.
[0027] In order to operate the CO2 shielded welding device and the servo controller more effectively, intuitively and conveniently, the CO2 shielded welding device and the servo controller can be connected to a digital operation interface panel, and the digital operation interface panel issues working instructions to the CO2 shielded welding device and the servo controller, thereby controlling the welding head 8, the rotating servo motor 4 and the feeding stepping servo motor 5.
[0028] like Figure 2 As shown, when the inner hole of the screw barrel 9 is surfacing-welded, it needs to be bored. At this time, it is only necessary to replace the welding rod 1 with a boring rod 14;
[0029] The boring processing mechanism includes a boring tool rod 14, at which the feed elastic sleeve 3 and the variable sleeve 11 are mounted on the boring tool rod 14, and the boring tool rod 14 passes through the rotary servo motor 4 and is connected and installed with the screw barrel 9 through the boring welding connection device 7 and extends into the screw barrel 9, and a right support part 10 is provided at the end of the screw barrel 9 away from the operation, which supports and stabilizes the extended boring tool rod 14, and the rotation of the boring tool rod 14 is controlled by the rotary servo motor 4, and the feed amount and feed speed of the boring tool rod 14 are controlled by the feed stepping servo motor 5.
[0030] The boring bar 14 is provided with two or more groups of tool mounting holes 15 at intervals, each group having two tool mounting holes 15, and the two tool mounting holes 15 in each group are 180 ORelatively speaking, a cutter head is installed in the cutter installation hole 15. Such an arrangement can effectively offset the radial runout of the boring bar 14 when boring a long hole, thereby effectively ensuring the machining accuracy.
[0031] The rotary servo motor 4 and the feed step servo motor 5 control the start and stop, forward and reverse rotation and linear movement of the boring bar 14 to perform boring processing on the screw barrel 9, thereby completing the repair of the screw barrel 9.
[0032] In order to effectively solve the problem of chip removal, a polyurethane hose with an outer diameter of 6mm-8mm can be fixedly installed on the boring bar 14 in a spiral manner to form a spiral chip removal device 16. When the boring bar 14 is subjected to a rotating boring process in the screw barrel 9, the generated metal chips are brought out of the screw barrel 9 by the spiral chip removal device 16. In order to further solve the problem of chip removal, an air jet is installed at the position of the cutter head. The air jet is also a polyurethane hose with an outer diameter of 6mm-8mm. During the boring process, the air jet can be used to impact the inner surface of the screw barrel 9 with gas, so that the metal chips fall to the bottom of the inner wall of the screw barrel 9 due to gravity, and then are easily rotated and brought out of the screw barrel 9 by the spiral chip removal device 16.
[0033] Furthermore, in order to lubricate and cool the boring bar 14 and the screw barrel 9 during boring processing, a lubricating coolant pipe can be installed on the boring bar 14. The lubricating coolant pipe is a polyurethane hose with an outer diameter of 6mm-8mm. The lubricating coolant pipe squeezes out a small amount of lubricating coolant on the inner wall of the screw barrel 9 and the cutter head on the boring bar 14. Because the rotation of the boring bar 14 is slow during boring processing, the presence of the lubricating coolant will not affect problems such as chip removal.
[0034] The arrangement of the air jet pipe and the lubricating coolant pipe must not affect the chip removal function of the spiral chip removal device 16 .
[0035] When rotation processing and repair are required, the joint sleeve 11 and the feed elastic sleeve 3 are loosened on the welding rod 1 or the boring bar 14. At this time, the welding rod 1 or the boring bar 14 is not controlled by the feed screw 2, but only controlled by the rotation of the rotary servo motor 4 to process and repair the screw barrel 9;
[0036] When linear feeding or processing and repairing is required, the variable sleeve 11 and the feed elastic sleeve 3 clamp the welding rod 1 or the boring rod 14. At this time, the rotary servo motor 4 stops starting, and the welding rod 1 or the boring rod 14 is only controlled by the feed screw 2 and the feed step servo motor 5 to perform linear feeding movement to process and repair the screw barrel 9.
[0037] That is to say, when the feed elastic sleeve 3 and the variable sleeve 11 are clamped against the welding rod 1 or the boring bar 14, the rotary servo motor 4 stops working.
[0038] Preferably, when the feed elastic sleeve 3 and the variable sleeve 11 are loose with respect to the welding rod 1 or the boring bar 14, the feed step servo motor 5 may not work to save energy.
[0039] The above is a boring and repair device for the worn inner hole of the injection molding and extrusion screw barrel.
[0040] After the screw barrel 9 is repaired by surfacing welding and boring, the screw barrel 9 can reach its original size, and the repair of the screw barrel 9 is completed.
[0041] The present utility model is not limited to the above-mentioned optimal implementation mode. Any other products identical or similar to the present utility model derived by anyone under the inspiration of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A deep hole surfacing and boring repair device for injection molding and extrusion screw barrels, comprising a screw barrel (9), a control mechanism, an inner hole surfacing mechanism and a boring mechanism, characterized in that: Boring and welding connection devices (7) are installed at both ends of the screw barrel (9), and the control mechanism comprises a rotary servo motor (4) fixedly installed at one end of the boring and welding connection device (7), a feed stepping servo motor (5) installed at one side of the rotary servo motor (4), and a feed screw (2) arranged in the feed stepping servo motor (5), a feed elastic sleeve (3) is detachably installed on the feed screw (2), and one end of the feed elastic sleeve (3) has a variable sleeve (11), and the rotary servo motor (4) and the feed stepping servo motor (5) are both connected to a servo controller through a line; The inner hole cladding mechanism comprises a welding rod (1), the welding rod (1) is sleeved by a variable sleeve (11) in a feed elastic sleeve (3) and passes through a rotary servo motor (4) and extends into a screw barrel (9), one end of the welding rod (1) has a welding head (8) in a curved arc shape, the welding rod (1) is a CO2 gas shielded welding rod, and a CO2 shielded welding device is arranged at the other end of the welding rod (1), and the CO2 shielded welding device controls the start and stop of the welding head (8); The boring mechanism comprises a boring bar (14), which is sleeved by a variable sleeve (11) in a feed elastic sleeve (3) and passes through a rotary servo motor (4) and extends into a screw barrel (9). A right support portion (10) is provided at the end of the screw barrel (9) away from the operation. The boring bar (14) is provided with two or more groups of tool mounting holes (15) at intervals, each group having two 180 O A tool mounting hole (15) is arranged opposite to each other, and a tool head is mounted in the tool mounting hole (15); When the feed elastic sleeve (3) and the variable sleeve (11) are clamped against the welding rod (1) or the boring bar (14), the rotary servo motor (4) stops working.
2. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 1 is characterized in that: The angle formed between the curved portion of the welding head (8) and the welding rod (1) is 90°-150°.
3. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 2 is characterized in that: The inner hole surfacing mechanism further comprises an exhaust device (13) arranged at an end of the screw barrel (9) away from the operation.
4. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 1 is characterized in that: The servo controller and the CO2 shielded welding device are both connected to a digital operation interface panel, and the digital operation interface panel issues working instructions to the CO2 shielded welding device and the servo controller.
5. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 1 is characterized in that: A polyurethane hose with an outer diameter of 6 mm to 8 mm is fixedly mounted in a spiral manner on the boring bar (14) of the boring mechanism, forming a spiral chip removal device (16).
6. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 5, characterized in that: An air jet pipe is installed at the position of the tool head of the boring mechanism, and the air jet pipe is a polyurethane hose with an outer diameter of 6mm-8mm.
7. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 6, characterized in that: A lubricating coolant pipe is installed on the boring bar (14) of the boring mechanism. The lubricating coolant pipe is a polyurethane hose with an outer diameter of 6mm-8mm. The jet pipe and the lubricating coolant pipe do not affect the cutting of the spiral cutting device (16).
8. The deep hole surfacing and boring repair device for injection molding and extrusion barrels according to claim 1 is characterized in that: When the feed elastic sleeve (3) and the variable sleeve (11) are loose with respect to the welding rod (1) or the boring tool rod (14), the feed stepping servo motor (5) does not work.