Double-sided slag and deburring machine
By designing a double-sided slag removal machine, the floating feeding device and magnetic adsorption belt conveyor are used to achieve stable positioning of the bottom surface of the part, solving the problem of difficult to remove slag and burrs on the bottom surface of the part in the prior art, and achieving high efficiency and excellent quality Determine the effect of slag cleaning.
Patent Information
- Application Number
- CN202010025144.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-01-10
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2040-01-10
AI Technical Summary
The prior art is difficult to efficiently remove slag and burrs on the bottom surface of flame and plasma cutting of the cut parts without turning, and conventional top surface deburring equipment cannot achieve this function.
A double-sided slag removal machine is designed, using a bottom slag removal mechanism and a top slag removal mechanism. The bottom slag removal mechanism includes an upper magnetic adsorption belt conveyor, a floating feeding device, a lower slag removal mechanism and a lower slag removal belt. The burr mechanism, the floating feeding device realizes stable positioning of the bottom surface of the part through the annular belt and the floating roller set system.
It realizes efficient removal of slag and burrs on both sides of the parts, ensures the quality of slag cleaning, improves production efficiency, and avoids inefficiency caused by equipment damage and manual transfer.
Smart Images

Figure CN111113215B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a double-sided slag cleaning and deburring machine. Background Art
[0002] Currently in the industry, for parts that form burrs on the top surface after conventional cutting, a lower magnetic adsorption belt conveyor mechanism is mainly used to adsorb the parts, and then an upper sanding belt deburring mechanism is used to remove the burrs. A chamfering mechanism is usually used to chamfer the edges of the parts.
[0003] However, for parts cut by flame and plasma cutting, the slag and burrs generated are usually concentrated on the bottom surface of the parts. And because many parts are large and heavy plates, they cannot be turned over manually after the previous process, and turning over with the help of equipment is very risky. Therefore, if you want to remove the burrs on the bottom surface of the part without turning it over, the part positioning surface must be on the top surface of the part. Obviously, conventional top surface deburring equipment cannot achieve this function.
[0004] After exploration, the industry has designed a top-surface positioning conveying equipment with a slag removal and deburring mechanism placed under the parts to remove the slag and burrs formed at the bottom of the parts.
[0005] The top surface positioning conveying equipment uses an upper magnetic adsorption belt conveying mechanism to cooperate with the main belt conveying mechanism below it to convey parts. At the same time, a slag removal hammer mechanism is placed under the bottom surface of the parts in front of the main belt conveying mechanism to first remove the larger slag, and then use the sanding mechanism to remove the relatively small burrs on the surface of the parts, and then chamfer. Finally, the parts with cleaned bottom burrs are manually transferred to the conventional deburring equipment to deal with the top burrs.
[0006] However, in actual operation, the above double-sided processing methods for parts gradually expose the following problems:
[0007] 1) Using separate equipment to remove burrs on the bottom and top surfaces of parts respectively, the connection is poor, manual transfer is required, and the efficiency is low;
[0008] 2) In the existing top-positioning conveying equipment, the belt surface of the main belt conveying mechanism is basically in rigid contact with the bottom surface of the parts, without any room for elastic maneuver. Due to the uneven slag or burrs on the bottom surface of the parts, the parts plate shakes up and down during the conveying process, resulting in the top surface being unable to serve as a good positioning surface to provide the parts with sufficient stability. Once the parts are unstable during the conveying process, the slag cleaning effect will be greatly affected. In severe cases, some parts with large burrs will become stuck and cannot be conveyed forward, damaging the equipment.
[0009] There is currently no good solution to the above-mentioned issues in the industry. Summary of the invention
[0010] The technical problem solved by the present invention is to provide a double-sided slag cleaning and deburring machine, which can efficiently remove slag and burrs on both sides of a part and can ensure the slag cleaning quality.
[0011] The technical scheme of the present invention is: a double-sided slag cleaning and deburring machine, including a bottom slag cleaning mechanism and a top slag cleaning mechanism, characterized in that the bottom slag cleaning mechanism includes an upper magnetic adsorption belt conveyor mechanism and a floating feeding device located below it and arranged in sequence along the part conveying direction, a lower slag cleaning mechanism and a lower abrasive belt deburring mechanism, wherein the floating feeding device includes a base, a driving roller mounted on the base through a driving roller bracket, a plurality of annular belts with one end sleeved on the driving roller and arranged side by side, and a floating roller assembly system mounted on the base and arranged corresponding to each annular belt Each floating roller assembly includes a plurality of floating roller units, each floating roller unit includes a roller lifting bracket arranged on a base through a spring guide mechanism and a floating roller pivotally arranged on the roller lifting bracket and in contact with the inner side of the upper surface of the ring belt; the floating roller assembly also includes at least one tensioning roller arranged on the base for tensioning the ring belt; and the top surface slag cleaning mechanism includes a lower magnetic adsorption belt conveying mechanism arranged downstream of the lower sanding belt deburring mechanism to receive the conveyed parts and an upper sanding belt deburring mechanism arranged above the lower magnetic adsorption belt conveying mechanism.
[0012] Furthermore, the spring guide mechanism in the present invention includes a plurality of longitudinal guide rods fixed to the bottom of the roller lifting bracket, guide holes provided on the base and cooperating with the longitudinal guide rods, and a spring provided between the bottom of the roller lifting bracket and the base.
[0013] Furthermore, the spring guide mechanism in the present invention also includes a linear bearing fixed on the base and matched with the corresponding longitudinal guide rod.
[0014] Furthermore, in the spring guide mechanism of the present invention, there are two longitudinal guide rods, which are symmetrically located on both sides of the spring, and both ends of the spring are fixed to the bottom of the roller lifting bracket and the base by screws respectively.
[0015] Furthermore, the tensioning roller described in the present invention is pivotally mounted on the tensioning roller bracket, and an adjusting cylinder is fixed on the base, the telescopic end of the adjusting cylinder is connected to the tensioning roller bracket, and is used to drive the tensioning roller to rise and fall to adjust the tension of the tensioning roller on the endless belt.
[0016] Furthermore, the present invention also includes a driving motor connected to the driving roller via a chain transmission mechanism and driving the driving roller to rotate, and a main driving roller for sleeved one end of the circular belt is fixed or integrally formed on the driving roller corresponding to each circular belt, and a belt groove for embedding the circular belt is provided on the main driving roller.
[0017] The lower slag cleaning mechanism described in the present invention can refer to the known technology, which is mainly composed of a slag cleaning hammer driving unit and a lifting mechanism that drives the slag cleaning hammer driving unit to move up and down. Of course, in order to further improve the slag cleaning effect in the present invention, we adopt the following scheme for the lower slag cleaning mechanism:
[0018] It includes two groups of slag cleaning hammer driving units arranged in sequence along the parts conveying direction and a lifting mechanism connecting and driving the two groups of slag cleaning hammer driving units to move up and down. Each group of slag cleaning hammer driving units includes a banding belt arranged transversely relative to the parts conveying direction, a synchronous pulley driving mechanism connecting and driving the banding belt to operate, and a plurality of slag cleaning hammers fixed on the banding belt through an elastic connecting body, and the running directions of the banding belts of the two groups of slag cleaning hammer driving units are opposite. The elastic connecting body can be a spring or rubber, preferably polyurethane rubber.
[0019] Furthermore, the present invention also includes a feed positioning mechanism, which is located directly above the floating feeding device, and the upper magnetic adsorption belt conveyor mechanism is located downstream of the feed positioning mechanism. The feed positioning mechanism includes a positioning bracket and a plurality of positioning rollers with flush bottoms pivotally mounted on the positioning bracket.
[0020] Furthermore, the upper magnetic adsorption belt conveyor mechanism and the lower magnetic adsorption belt conveyor mechanism described in the present invention are both known technologies, that is, they both include a mechanism bracket, a driving roller group installed on the mechanism bracket and an annular conveyor belt wound around the driving roller group, and also include a plurality of magnets fixed on the mechanism bracket and located on the inner side of the annular conveyor belt.
[0021] Furthermore, in order to further chamfer the upper and lower edges of the parts, the present invention may also include a lower chamfering mechanism located between the lower sand belt deburring mechanism and the lower magnetic adsorption belt conveyor mechanism, and an upper chamfering mechanism located downstream of the upper sand belt deburring mechanism. Of course, the chamfering mechanism itself is also a well-known technology in the industry, and is composed of a group belt fixed with chamfering sand blocks, a synchronous belt pulley driving mechanism connected to drive the group belt to operate, and a lifting mechanism connected to drive the synchronous belt pulley driving mechanism to lift up and down.
[0022] The specific use process of the present invention is as follows:
[0023] Feed the parts (long plates) cut by flame and plasma cutting into the space between the feed positioning mechanism and the floating feeding device, so that the parts are transported forward;
[0024] The parts are adsorbed by the upper magnetic adsorption belt conveyor mechanism and continue to be conveyed forward with the top surface as the positioning surface. During this process, the bottom surface of the parts is first hammered by the slag cleaning hammer of the lower slag cleaning mechanism to remove large slag, and then the surface burrs are removed by the lower sanding belt deburring mechanism and the bottom edge is chamfered by the lower chamfering mechanism.
[0025] The parts are adsorbed by the lower magnetic adsorption belt conveyor mechanism and continue to be conveyed forward with the processed bottom surface as the positioning surface. During this process, the top surface of the parts is successively passed through the upper sanding belt deburring mechanism to remove smaller burrs on the surface and the upper chamfering mechanism to chamfer the top surface edge.
[0026] Compared with the prior art, the present invention has the following advantages:
[0027] 1) The double-sided slag and burr removal machine of the present invention can efficiently remove slag and burrs on both sides of parts and ensure the quality of slag removal. Compared with the current processing equipment, the upper magnetic adsorption belt conveyor mechanism and the lower magnetic adsorption belt conveyor mechanism are directly connected to feed materials without transfer, which greatly improves production efficiency.
[0028] 2) The present invention designs a floating feeding device as a core component, and its annular belt surface has a floating characteristic and can fluctuate with the burrs on the bottom surface of the parts. Therefore, when it is used in conjunction with the magnetic adsorption belt conveyor mechanism, it can always use the top surface of the parts as a positioning surface to press against the upper magnetic adsorption belt conveyor mechanism, giving the conveyed parts sufficient stability and smoothness, thereby ensuring the quality of subsequent slag cleaning.
[0029] 3) The floating feeding device of the present invention has relatively independent floating roller groups, and the belts do not interfere with each other, which perfectly caters to the burrs with different widths and lengths at the bottom of each part, and will not cause overall damage to the belt due to overall pulling and dislocation like using a whole belt.
[0030] 4) The floating feeding device of the present invention has a simple structure, is easy to assemble, is quick to produce, and has high practicality.
[0031] 5) The lower slag cleaning mechanism adopts two sets of slag cleaning hammer driving units, and the combined belts of the two sets of slag cleaning hammer driving units run in opposite directions, so that their respective slag cleaning hammers can repeatedly hammer the slag from two opposite directions, greatly improving the slag removal effect and efficiency.
[0032] 6) The double-sided slag cleaning and deburring machine of the present invention uses the top surface of the part with smaller and fewer burrs as the positioning surface to implement magnetic adsorption and transportation, first removes the large slag and burrs on the bottom surface of the part, and then processes the top surface of the part. The design is reasonable and can effectively improve the slag cleaning efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:
[0034] Figure 1 It is a front view of the structure of the present invention as a whole;
[0035] Figure 2 for Figure 1 The separate structural front view of the floating feeding device;
[0036] Figure 3 for Figure 2 A top view of
[0037] Figure 4 for Figure 2 Left view of;
[0038] Figure 5 for Figure 2 Schematic diagram of the three-dimensional structure;
[0039] Figure 6 It is a schematic diagram of the overall three-dimensional structure of the present invention (the slag cleaning hammer on the slag cleaning hammer driving unit combined belt is omitted).
[0040] Wherein: A, floating feeding device; 1, base; 2, driving roller bracket; 3, driving roller; 4, endless belt; 5, roller lifting bracket; 6, floating roller; 7, tensioning roller; 8, longitudinal guide rod; 9, spring; 10, linear bearing; 11, tensioning roller bracket; 12, adjusting cylinder; 13, main driving roller; 14, upper magnetic adsorption belt conveyor mechanism; 15, feeding positioning mechanism; 15a, positioning bracket; 15b, positioning roller; 16, parts; 17, slag cleaning hammer driving unit; 17a, combined belt; 17b, slag cleaning hammer; 18, lower sanding belt deburring mechanism; 19, lower magnetic adsorption belt conveyor mechanism; 20, upper sanding belt deburring mechanism; 21, lower chamfering mechanism; 22, upper chamfering mechanism. DETAILED DESCRIPTION
[0041] Embodiment 1: Combination Figures 1 to 6 The figure shows a specific embodiment of the double-sided slag and deburring machine of the present invention.
[0042] First, Figure 1 As shown, this double-sided slag cleaning and deburring machine has a bottom slag cleaning mechanism and a top slag cleaning mechanism, wherein the bottom slag cleaning mechanism is composed of a feed positioning mechanism 15 located above, an upper magnetic adsorption belt conveyor mechanism 14 located downstream of the feed positioning mechanism 15, and a floating feeder device A located below the upper magnetic adsorption belt conveyor mechanism 14 and arranged in sequence along the conveying direction of the part 16, a lower slag cleaning mechanism 17, a lower sanding belt deburring mechanism 18 and a lower chamfering mechanism 21, wherein the feed positioning mechanism 15 is located directly above the floating feeder device A. Figure 1 and Figure 6As shown, the feed positioning mechanism 15 in this embodiment is composed of a positioning bracket 15a and four positioning rollers 15b which are arranged in parallel and have flush bottoms and are pivotally mounted on the positioning bracket 15a.
[0043] The floating feeding device A is the core structural design of this case. Figure 2~Figure 5 As shown, it is composed of a base 1, a driving roller 3 installed on the base 1 through a driving roller bracket 2, 10 endless belts 4 with one end sleeved on the driving roller 3 and arranged side by side, a floating roller assembly installed on the base 1 and arranged corresponding to each endless belt 4, and a driving motor (not shown in the figure) connected to the driving roller 3 through a chain transmission mechanism and driving it to rotate.
[0044] Specific as Figure 1 As shown, in this embodiment, each floating roller group is composed of five floating roller units and a tensioning roller 7 for tensioning the endless belt 4 which is arranged on the base 1 through a lifting and adjusting mechanism.
[0045] Each floating roller unit includes a roller lifting bracket 5 arranged on the base through a spring guide mechanism and a floating roller 6 pivotally arranged on the roller lifting bracket 5 and in contact with the inner side of the upper surface of the endless belt 4. The spring guide mechanism is composed of two longitudinal guide rods 8 fixed to the bottom of the roller lifting bracket 5, guide holes arranged on the base 1 and cooperating with the longitudinal guide rods 8, and a spring 9 arranged between the bottom of the roller lifting bracket 5 and the base 1. The two longitudinal guide rods 8 are symmetrically located on both sides of the spring 9, and the two ends of the spring 9 are respectively fixed to the bottom of the roller lifting bracket 5 and the base 1 by screws. And specifically as Figure 2 As shown, the spring guide mechanism in this embodiment further comprises a linear bearing 10 which is fixed on the base 1 and cooperates with the corresponding longitudinal guide rod 8 .
[0046] Still as specific as Figure 2 As shown, the lifting and lowering adjustment mechanism for adjusting the tension roller 7 in this embodiment is composed of a tension roller bracket 11 and an adjustment cylinder 12 fixed on the base 1. The tension roller 7 is pivotally arranged on the tension roller bracket 11, and the telescopic end of the adjustment cylinder 12 is connected to the tension roller bracket 11, which is used to drive the tension roller 7 to rise and fall to adjust the tension of the tension roller 7 on the endless belt 4.
[0047] In this embodiment, the driving roller 3 is integrally formed with a main driving roller 13 corresponding to each endless belt 4 for sleeved on one end of the endless belt 4, and the main driving roller 13 is provided with a belt groove for the endless belt 4 to be inserted. Figures 3-5 shown.
[0048] Recombination Figure 1As shown, the lower slag cleaning mechanism described in this embodiment includes two groups of slag cleaning hammer driving units 17 arranged in sequence along the conveying direction of the parts 16 and a lifting mechanism (omitted in the figure) connecting and driving the two groups of slag cleaning hammer driving units to move up and down, each group of slag cleaning hammer driving units 17 includes a combination belt 17a arranged transversely relative to the conveying direction of the parts 16, a synchronous pulley driving mechanism connected to and driving the combination belt 17a to operate, and a plurality of slag cleaning hammers 17b fixed to the combination belt 17a through an elastic connecting body, and the combination belts 17a of the two groups of slag cleaning hammer driving units run in opposite directions, the elastic connecting body is a columnar body made of polyurethane rubber, and threaded holes are arranged at both ends, the threaded hole at one end cooperates with the threaded section on the slag cleaning hammer 17b to fix the slag cleaning hammer, and the threaded hole at the other end cooperates with a screw to fix it to the combination belt 17a.
[0049] And then combined Figure 1 As shown, the top surface slag cleaning mechanism is composed of a lower magnetic adsorption belt conveyor mechanism 19 arranged downstream of the lower sanding belt deburring mechanism 18 to receive the conveyed parts 16, and an upper sanding belt deburring mechanism 20 and an upper chamfering mechanism 22 arranged above the lower magnetic adsorption belt conveyor mechanism 19 and sequentially arranged along the conveying direction of the parts 16.
[0050] The upper magnetic adsorption belt conveyor mechanism 14 and the lower magnetic adsorption belt conveyor mechanism 19 described in this embodiment are both known technologies, that is, they both include a mechanism bracket, a driving roller group installed on the mechanism bracket and an annular conveyor belt wound around the driving roller group, and also include a plurality of magnets fixed on the mechanism bracket and located on the inner side of the annular conveyor belt.
[0051] The lower chamfering mechanism 21 and the upper chamfering mechanism 22 are also well-known technologies in the industry, and are composed of a combination belt with a chamfering sand block fixed thereon, a synchronous pulley driving mechanism connected to drive the combination belt to operate, and a lifting mechanism connected to drive the synchronous pulley driving mechanism to rise and fall.
[0052] The specific use process of the present invention is as follows:
[0053] See Figure 1 As shown, the parts 16 (long plates) cut by flame and plasma cutting are fed between the feed positioning mechanism 15 and the floating feeding device A, so that the parts 16 are transported forward;
[0054] The part 16 is adsorbed by the upper magnetic adsorption belt conveyor mechanism 14 and continues to be conveyed forward with the top surface as the positioning surface. During this process, the bottom surface of the part 16 is first hammered by the slag cleaning hammers 17b in the two groups of slag cleaning hammer driving units of the lower slag cleaning mechanism to remove large slag, and then the surface burrs are removed by the lower sanding belt deburring mechanism 18 and the bottom edge is chamfered by the lower chamfering mechanism 21.
[0055] The part 16 is adsorbed by the lower magnetic adsorption belt conveyor mechanism 19 and continues to be conveyed forward with the processed bottom surface as the positioning surface. During this process, the top surface of the part 16 is successively passed through the upper sanding belt deburring mechanism 20 to remove smaller burrs on the surface and the upper chamfering mechanism 22 to chamfer the top surface edge.
[0056] Of course, the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any modifications made according to the spirit of the main technical solution of the present invention should be included in the protection scope of the present invention.
Claims
1. A double-sided slag cleaning and deburring machine, comprising a bottom slag cleaning mechanism and a top slag cleaning mechanism, characterized in that The bottom surface slag cleaning mechanism comprises an upper magnetic adsorption belt conveying mechanism (14) and a floating feeding device (A) located below the floating feeding device and arranged in sequence along the conveying direction of the parts (16), a lower slag cleaning mechanism and a lower sanding belt deburring mechanism (18), wherein the floating feeding device comprises a base (1), a driving roller (3) mounted on the base (1) via a driving roller bracket (2), a plurality of annular belts (4) with one end sleeved on the driving roller (3) and arranged side by side, and a floating roller assembly system mounted on the base (1) and arranged corresponding to each annular belt (4), each floating roller assembly system comprising a plurality of floating roller units, each floating roller unit comprising a roller lifting bracket (5) arranged on the base via a spring guide mechanism and a floating roller (6) pivotally arranged on the roller lifting bracket (5) and in contact with the inner side of the upper surface of the annular belt (4); the floating roller assembly system also comprises a spring guide mechanism disposed on the base (1) for tensioning the rollers. At least one tensioning roller (7) of the endless belt (4); and the top surface slag cleaning mechanism comprises a lower magnetic adsorption belt conveying mechanism (19) arranged downstream of the lower sand belt deburring mechanism (18) to receive the conveyed parts (16) and an upper sand belt deburring mechanism (20) arranged above the lower magnetic adsorption belt conveying mechanism (19), the lower slag cleaning mechanism comprising two groups of slag cleaning hammer drive units (17) arranged in sequence along the conveying direction of the parts (16) and a lifting mechanism connected to drive the two groups of slag cleaning hammer drive units to move up and down, each group of slag cleaning hammer drive units (17) comprises a combined belt (17a) arranged transversely relative to the conveying direction of the parts (16), a synchronous belt pulley drive mechanism connected to and driving the combined belt (17a) to operate, and a plurality of slag cleaning hammers (17b) fixed to the combined belt (17a) through an elastic connector, and the combined belts (17a) of the two groups of slag cleaning hammer drive units operate in opposite directions.
2. The double-sided slag cleaning and deburring machine according to claim 1, characterized in that The spring guide mechanism comprises a plurality of longitudinal guide rods (8) fixed to the bottom of the roller lifting bracket (5), guide holes provided on the base (1) and cooperating with the longitudinal guide rods (8), and a spring (9) provided between the bottom of the roller lifting bracket (5) and the base (1).
3. The double-sided slag cleaning and deburring machine according to claim 2, characterized in that The spring guide mechanism also includes a linear bearing (10) fixed on the base (1) and cooperating with a corresponding longitudinal guide rod (8).
4. The double-sided slag cleaning and deburring machine according to claim 2 or 3, characterized in that In the spring guide mechanism, there are two longitudinal guide rods (8) symmetrically located on both sides of the spring (9), and both ends of the spring (9) are respectively fixed to the bottom of the roller lifting bracket (5) and the base (1) by screws.
5. The double-sided slag cleaning and deburring machine according to claim 1, characterized in that The tensioning roller (7) is pivotally mounted on the tensioning roller bracket (11), and an adjusting cylinder (12) is fixed on the base (1). The telescopic end of the adjusting cylinder (12) is connected to the tensioning roller bracket (11) and is used to drive the tensioning roller (7) to rise and fall so as to adjust the tension of the tensioning roller (7) on the endless belt (4).
6. The double-sided slag cleaning and deburring machine according to claim 1, characterized in that It also includes a driving motor connected to the driving roller (3) via a chain transmission mechanism and driving the driving roller (3) to rotate, and a main driving roller (13) for sleeved one end of the circular belt (4) is fixed or integrally formed on the driving roller (3) corresponding to each circular belt (4), and a belt groove for the circular belt (4) to be embedded is provided on the main driving roller (13).
7. The double-sided slag cleaning and deburring machine according to claim 1, characterized in that It also includes a feed positioning mechanism (15) which is located directly above the floating feeding device (A), and an upper magnetic adsorption belt conveying mechanism (14) is located downstream of the feed positioning mechanism (15). The feed positioning mechanism (15) includes a positioning bracket (15a) and a plurality of positioning rollers (15b) pivotally mounted on the positioning bracket (15a) with flush bottoms.
8. The double-sided slag cleaning and deburring machine according to claim 1, characterized in that The upper magnetic adsorption belt conveyor mechanism (14) and the lower magnetic adsorption belt conveyor mechanism (19) both comprise a mechanism bracket, a driving roller group mounted on the mechanism bracket, and an annular conveyor belt wound around the driving roller group, and also comprise a plurality of magnets fixed on the mechanism bracket and located on the inner side of the annular conveyor belt.
9. The double-sided slag cleaning and deburring machine according to claim 1, characterized in that It also includes a lower chamfering mechanism (21) located between the lower sanding belt deburring mechanism (18) and the lower magnetic adsorption belt conveying mechanism (19), and an upper chamfering mechanism (22) located downstream of the upper sanding belt deburring mechanism (20).
Citation Information
Patent Citations
Double-sided slag removal and deburring machine
CN211992281U