A double scraper mechanism for a continuous metal extrusion press

Abstract

The application discloses a double-blade mechanism of a continuous metal extruding machine, which comprises two vertically arranged plates, two blade assemblies, a supporting plate, two guide plates, a guide groove, a sliding plate, a blade, a pressing plate, a screw rod seat, an adjusting screw rod and a cover plate.

Description

Technical Field

[0001] This invention relates to the field of continuous metal extrusion press technology, and more specifically to a double scraper mechanism for a continuous metal extrusion press. Background Technology

[0002] A continuous metal extrusion press is driven by a drive unit that rotates the extrusion rollers. The drive unit includes a main motor, a gearbox, a coupling, and a main shaft. The power of the main motor is transmitted to the main shaft through the gearbox and coupling, and the main shaft drives the extrusion rollers to rotate. During operation, the material is drawn into the forming cavity by the friction between the roller groove and the billet. The extrusion die is used to complete the plastic extrusion of metal. During the high-speed rotation of the extrusion rollers, the intense friction of the metal, and the plastic deformation, the surface of the billet will undergo shearing and peeling. At the same time, the surface oxide scale will fall off, and the edges and corners of the material will be slightly torn, resulting in metal debris. This debris adheres to and accumulates in the roller grooves, die openings, and other work areas. If it is not cleaned for a long time, it will directly scratch the working surfaces of the die and the extrusion rollers, destroy the forming accuracy, and cause surface defects and dimensional deviations in the finished product. At the same time, the accumulated debris will hinder the normal flow of metal, increase the extrusion load of the equipment, and easily cause die blockage, equipment overload failure, damage to core components, and affect the continuity of production.

[0003] Existing chip removal mechanisms mostly use a single scraper structure, which has blind spots in chip removal. Molten metal residue is highly adhesive, and a single scraper cannot thoroughly remove it. Accumulated residue can scratch wheel grooves, cause profile defects, and even lead to mold blockage and shutdown. Traditional scraper structures are poorly designed, cumbersome to install, disassemble, and replace, and difficult to adapt to wheel groove contours. Scraper position adjustment is inconvenient, vibration resistance is poor, and the scraping process is prone to shaking. Furthermore, scraped residue tends to accumulate inside the mechanism, requiring frequent shutdowns for cleaning, resulting in a heavy workload for equipment maintenance and impacting continuous extrusion production efficiency. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, this application provides a double scraper mechanism for a continuous metal extrusion press, which solves the problems of blind spots, incomplete scraping, easy accumulation of residual chips, and poor adjustability of the existing single scraper chip removal.

[0005] A continuous metal extrusion press with a double scraper mechanism includes two symmetrically arranged vertical plates, the bottom surface of which is flat and the top surface is inclined. It also includes two scraper assemblies for scraping away molten metal residue adhering to the inner wall of the extrusion roller groove. One scraper assembly is mounted on the bottom surface of the two vertical plates via a support plate, and the other scraper assembly is mounted on the top surface of the two vertical plates via a support plate. Each scraper assembly includes a support plate with two guide plates symmetrically fixed on it, forming a guide groove between the two guide plates. A sliding plate is slidably fitted inside the guide groove. The slide slides back and forth in a straight line along the guide groove; a scraper is detachably and fixedly installed at the front end of the slide, with the blade end of the scraper extending out of the guide groove and facing the extrusion wheel; a pressure plate is fixedly connected to the rear end of the slide, and a screw seat is detachably and fixedly installed on the support plate, with an adjusting screw threaded onto the screw seat; the end of the adjusting screw presses against the rear side of the pressure plate, and rotating the adjusting screw can push the pressure plate and the slide to move forward and backward in a straight line; a cover plate is installed on the top of the two guide plates, and the cover plate presses on the slide to vertically limit the slide and prevent the slide from falling out of the guide groove.

[0006] In some embodiments, each pallet is provided with two vertical plate limiting grooves arranged side by side, and the two vertical plates are installed in the two vertical plate limiting grooves respectively and locked and fixed by fasteners.

[0007] In some embodiments, a chip removal groove is also included, which is formed between two vertical plates and two support plates. The front end of the chip removal groove is the chip inlet end and the rear end is the chip outlet end, which is used to centrally remove scraped metal chips.

[0008] In some embodiments, the front end of the slide plate is provided with a U-shaped scraper groove, the front end of the scraper groove is in communication with the outside, the scraper is installed in the scraper groove and locked by a number of fasteners, and the blade of the scraper extends out of the scraper groove and the extension length is adjustable.

[0009] In some embodiments, the blade of the scraper is positioned facing the inner wall of the groove of the extrusion wheel, and the blade is an arc-shaped cutting edge. The curvature of the arc-shaped cutting edge is adapted to the curvature of the inner wall of the groove of the extrusion wheel, and the blade and the inner wall of the groove maintain a preset scraping gap.

[0010] In some embodiments, the scraper includes two separate blades arranged opposite each other, and the distance between the two blades can be adjusted by a distance adjustment structure. The distance adjustment structure includes a distance adjustment hole opened in the scraper groove and a fastener corresponding to lock the two blades. The fastener is movably inserted into the distance adjustment hole. Loosening the fastener can move the relative position of the two blades to adjust the distance, and locking the fastener can position and fix the two blades.

[0011] In some embodiments, the cover plate is fixed to the guide plate by multiple fasteners, and the cover plate and the skateboard are fitted with a clearance to limit the vertical bounce of the skateboard and ensure the smooth sliding of the skateboard.

[0012] In some embodiments, the chip discharge trough is an inclined structure, which allows metal chips to slide off automatically by their own weight.

[0013] In some embodiments, two fixing plates are symmetrically mounted on the rear end plane of one of the trays.

[0014] The beneficial effects of this application are as follows: This application sets up an upper and lower differentiated double scraper assembly to achieve all-round chip removal from the wheel groove, eliminate blind spots in cleaning, and avoid chip accumulation that could cause profile defects and mold blockage; the scraper extension and blade spacing can be precisely adjusted, and the arc-shaped cutting edge adapts to the curved surface of the wheel groove to protect the extrusion wheel; the guide cover plate suppresses slide plate jumping and ensures stable operation; the inclined chip discharge groove relies on its own weight to discharge chips; each component is detachable, and worn parts can be replaced individually, making maintenance convenient, reducing parts costs, and improving the stability and production efficiency of continuous extrusion operations.

[0015] Additional aspects and advantages of this application will continue to be set forth in the description which follows, in part from the description which follows, or may be learned by practice of this application. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0017] Figure 1 This is a three-dimensional structural diagram of the present application when combined with the extrusion wheel.

[0018] Figure 2 This is a frontal stereoscopic structural diagram of this application.

[0019] Figure 3 This is a schematic diagram of the planar structure when the present application is combined with the extrusion wheel.

[0020] Figure 4 This is a cross-sectional structural diagram of this application.

[0021] Figure 5 yes Figure 3 A top-view structural diagram.

[0022] Figure 6 Figure 5 Enlarged view of point A in the middle.

[0023] Figure 7 This is a structural diagram of the combination of the skateboard and the scraper.

[0024] Figure 8 This is a schematic diagram of the disassembled skateboard and scraper.

[0025] Reference numerals: 1. Vertical plate; 100. Plane; 101. Sloping surface; 2. Scraper assembly; 200. Support plate; 200a. Vertical plate limiting groove; 201. Guide plate; 202. Guide groove; 203. Slide plate; 203a. Scraper groove; 204. Scraper blade; 204a. Blade body; 204b. Pressure plate; 205. Screw seat; 206. Adjusting screw; 207. Cover plate; 208. Chip removal groove; 209. Spacing adjustment hole; 210. Fastener; 211. Extrusion wheel; 3. Wheel groove; 300. Fixing plate; 4. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Reference Figures 1-8 A continuous metal extrusion press with a double scraper mechanism includes two symmetrically arranged vertical plates 1, preferably right-angled trapezoidal plates; the bottom surface of the vertical plate 1 is a plane 100, and the top surface of the vertical plate 1 is an inclined plane 101; it also includes two scraper assemblies 2, which are used to scrape off molten metal residues adhering to the inner wall of the groove 300 of the extrusion roller 3; the lower scraper assembly 2 is mounted parallel to the bottom surface of the two vertical plates 1 via a support plate 200, and the upper scraper assembly 2 is mounted on the top surface of the two vertical plates 1 via a support plate 200. The scraper assembly 2 is inclined at an acute angle to the horizontal plane, preferably 30° to 45°; the scraper assembly 2 includes a U-shaped support plate 200, on which two rectangular guide plates 201 are symmetrically fixed, forming a guide groove 202 between the two guide plates 201; the guide groove 202 is slidably mounted inside. Equipped with a slide plate 203, the slide plate 203 can slide back and forth in a straight line along the guide groove 202; a scraper 204 is detachably and fixedly installed at the front end of the slide plate 203, the blade 204a end of the scraper 204 extends out of the outside of the guide groove 202 and is set towards the extrusion roller 3; a pressure plate 205 is fixedly connected to the rear end of the slide plate 203, and a screw seat 206 is detachably fixed on the support plate 200, and an adjusting screw 207 is threaded onto the screw seat 206; the end of the adjusting screw 207 presses against the rear side of the pressure plate 205, and by rotating the adjusting screw 207, the pressure plate 205 and the slide plate 203 can be pushed forward and backward in a straight line; a cover plate 208 is installed on the top of the two guide plates 201, and the cover plate 208 presses on the slide plate 203 to vertically limit the slide plate 203 and prevent the slide plate 203 from falling out of the guide groove 202.

[0028] This application features two sets of differentially arranged scraper assemblies 2, working in conjunction with a right-angled trapezoidal vertical plate structure to achieve omnidirectional chip removal from the groove 300 of the extrusion roller 3. The parallel scraper 204 at the bottom stably scrapes away accumulated chips at the bottom of the groove 300, while the inclined scraper 204 at the top can be used for secondary scraping of accumulated chips within the groove 300. The inclined scraper 204 at the top also conforms to the contour of the groove 300's sidewall, efficiently cleaning molten metal residue adhering to the sidewall. The combined effect eliminates blind spots, effectively solving the problems of incomplete chip removal and residue residue associated with traditional single scraper 204 methods. This avoids surface defects, dimensional deviations, mold blockage, and equipment overload caused by chip accumulation, significantly improving the forming quality and production stability of extruded products. This application also includes a screw-adjustable feed structure, allowing precise adjustment of the scraper 204 extension distance to adapt to extrusion rollers 3 with varying wear levels and different processing conditions. The adjustment is convenient and highly adaptable. Meanwhile, the guide plate 201, guide groove 202, and cover plate 208 work together to provide lateral guidance and vertical limitation for the slide plate 203, ensuring smooth sliding feed of the scraper 204, with no deviation or disengagement during operation, and high structural stability. Furthermore, the scraper 204, support plate 200, and screw seat 206 are all detachable, facilitating the replacement of worn parts and equipment maintenance, effectively reducing equipment operation and maintenance costs, extending the service life of the extrusion roller 3 and the die, and significantly improving the overall efficiency of continuous metal extrusion operations.

[0029] In some embodiments, each pallet 200 is provided with two vertical plate limiting grooves 200a arranged side by side, and two vertical plates 1 are installed in the two vertical plate limiting grooves 200a respectively and locked and fixed by fasteners 211. The fasteners 211 mentioned in this application include bolts, nuts or screws.

[0030] This application incorporates a vertical plate limiting groove 200a on the pallet 200 to position and limit the vertical plate 1. This, combined with threaded fasteners 211 such as bolts and nuts, effectively restricts installation offset and loosening of the vertical plate 1, ensuring the installation accuracy and positional consistency of the upper and lower scraper assemblies 2, and guaranteeing precise alignment of the scraper 204 with the groove 300 of the extrusion wheel 3. This limiting assembly structure offers reliable positioning and high assembly accuracy, effectively preventing component displacement caused by long-term vibration operation and ensuring the stability of the chip removal operation. Furthermore, the use of standardized threaded fasteners 211 facilitates easy assembly and disassembly, simplifying equipment maintenance, component disassembly and adjustment, and significantly improving assembly efficiency and ease of future maintenance.

[0031] In some embodiments, a chip removal groove 209 is also included. The chip removal groove 209 is formed between two vertical plates 1 and two support plates 200. The front end of the chip removal groove 209 is the chip inlet end and the rear end is the chip outlet end, which is used to centrally discharge the scraped metal chips.

[0032] This application forms a chip removal groove 209 between the vertical plate 1 and the support plate 200, allowing scraped metal chips to flow in from the chip inlet and be discharged through the chip outlet. This prevents chips from accumulating inside the scraper mechanism, avoids chips from jamming sliding parts and interfering with the scraper 204 feed, maintains stable operation of the mechanism, reduces the frequency of downtime for cleaning, and improves the reliability of continuous extrusion operations.

[0033] In some embodiments, the front end of the slide plate 203 is provided with a U-shaped scraper groove 203a, the front end of the scraper groove 203a is in communication with the outside, the scraper 204 is assembled in the scraper groove 203a and locked by a number of fasteners 211, and the blade 204a of the scraper 204 extends out of the outside of the scraper groove 203a and the extension length is adjustable.

[0034] The sliding plate 203 of this application has a U-shaped scraper groove 203a at its front end. The scraper 204 is installed in the groove and locked by the fastener 211. The extension length of the blade 204a is adjustable. This structure allows for quick disassembly and replacement of worn scraper 204, adapting to different chip removal conditions. The scraper groove 203a provides limiting support for the scraper 204, enhancing the working rigidity of the scraper 204, reducing vibration during scraping, ensuring stable contact between the blade 204a and the wheel groove 300, and improving the chip removal effect.

[0035] In some embodiments, the blade 204a of the scraper 204 is disposed facing the inner wall of the groove 300 of the extrusion wheel 3. The blade 204a is an arc-shaped cutting edge, and the curvature of the arc-shaped cutting edge is adapted to the curvature of the inner wall of the groove 300 of the extrusion wheel 3. The blade 204a and the inner wall of the groove 300 maintain a preset scraping gap.

[0036] The scraper 204 of this application adopts an arc-shaped cutting edge that matches the curvature of the inner wall of the wheel groove 300, allowing it to fit evenly against the inner wall of the wheel groove 300, ensuring a consistent scraping gap and improving the chip removal effect. The arc-shaped edge distributes force more evenly, reducing wear on the cutting edge 204a and minimizing scraping impact. The preset gap prevents the cutting edge 204a from directly scraping against the wheel groove 300, protecting the working surface of the extrusion roller 3 wheel groove 300 and extending the service life of the equipment.

[0037] In some embodiments, the scraper 204 includes two separate blades 204b, which are arranged opposite to each other. The spacing between the two blades 204b can be adjusted by a spacing adjustment structure. The spacing adjustment structure includes a spacing adjustment hole 210 opened in the scraper groove 203a and a fastener 211 corresponding to lock the two blades 204b. The fastener 211 can be movably inserted into the spacing adjustment hole 210. Loosening the fastener 211 can move the relative position of the two blades 204b to adjust the spacing. Locking the fastener 211 can position and fix the two blades 204b.

[0038] The scraper of this application adopts a split double-blade structure 204b, which, together with the spacing adjustment hole 210 and fastener 211, forms a spacing adjustment structure. Loosening the fastener 211 allows the two blades 204b to move, flexibly adjusting the spacing between the blades 204b to adapt to the wheel grooves 300 of extrusion wheels of different widths, thus enhancing versatility. The two blades 204b can each fit against the inner wall of the wheel groove, enabling secondary scraping of residue and improving the coverage of residue removal. After adjustment, tightening the fastener 211 secures the blades 204b, making operation simple. The split blades 204b can be replaced individually after wear, eliminating the need to replace the entire scraper 204, reducing parts costs, while ensuring the fitting accuracy between the blade 204a and the wheel groove 300, and stabilizing the chip removal effect.

[0039] In some embodiments, the cover plate 208 is fixed to the guide plate 201 by a plurality of fasteners 211. The cover plate 208 and the slide plate 203 are in clearance fit to limit the vertical jumping of the slide plate 203 and ensure the smooth sliding of the slide plate 203.

[0040] The cover plate 208 of this application is fixed to the guide plate 201 by fasteners 211, and has a clearance fit with the slide plate 203. This restricts the vertical jump of the slide plate 203 and prevents it from moving up and down. It ensures smooth linear feed of the slide plate 203, maintains a stable scraping gap between the scraper 204 and the wheel groove 300, and avoids scraping vibration. The fasteners 211 facilitate disassembly and assembly, making it convenient for the inspection and maintenance of the slide plate 203 and ensuring continuous and stable chip removal operations.

[0041] In some embodiments, the chip discharge trough 209 is an inclined structure, which allows metal chips to slide off automatically by its own weight. The chip discharge trough 209 is inclined, and the chips slide off automatically by its own weight without the need for additional power. This can avoid or reduce the accumulation and jamming of chips in the trough, ensure continuous chip discharge, and reduce the frequency of manual cleaning.

[0042] In some embodiments, two fixing plates 4 are symmetrically installed on the rear end plane of one of the pallets 200. The symmetrical arrangement of two fixing plates 4 at the rear end of the pallet 200 can improve the structural strength and vibration resistance of the rear end of the pallet 200 and reduce the deformation caused by the vibration of the extrusion operation. The symmetrical arrangement ensures uniform force distribution, facilitates the overall installation and positioning of the mechanism, stabilizes the installation posture of the pallet 200 and the scraper assembly 2, maintains the working position accuracy of the scraper 204, and ensures continuous chip removal effect.

[0043] Working principle: During the operation of the continuous metal extrusion press, the extrusion roller 3 rotates to perform plastic extrusion molding of metal. Molten metal residue adheres to the inner wall of the roller groove 300. This mechanism is installed on the frame of the extrusion press next to the extrusion roller 3. Two sets of scraper assemblies 2 are respectively installed on the bottom and top surfaces of the right-angled trapezoidal vertical plate 1. The bottom scraper is arranged in parallel to clean the residue at the bottom of the roller groove, and the top scraper is arranged at an angle to clean the residue on the side wall and / or inner wall of the roller groove. Rotating the adjusting screw 207 pushes the pressure plate 205 to drive the slide plate 20. 3. The scraper is fed linearly along the guide groove 202 to adjust the extension length of the scraper. The cover plate 208 and the slide plate 203 are fitted with a clearance to limit the vertical jump of the slide plate 203 and ensure smooth sliding. The scraper can be integrated or split. When the scraper is a split blade body 204b, the blade body 204b can be moved within the spacing adjustment hole 210 by loosening the fastener 211 to adjust the spacing between the two blade bodies. The arc-shaped cutting edge matches the curvature of the inner wall of the wheel groove 300 to maintain the preset scraping gap and scrape off the residue on the inner wall of the wheel groove 300. The scraped metal residue enters the inclined chip discharge groove 209 formed between the vertical plate 1 and the support plate 200 and slides backward automatically along the chip discharge groove 209 by its own weight and is discharged. The vertical plate limiting groove 200a on the support plate 200, together with the fastener 211, locks the vertical plate 1 to resist equipment vibration and ensure the stability of the position of the double scraper assembly 2. The entire mechanism continuously scrapes off the residue in the wheel groove 300 to prevent the accumulation of residue and ensure stable continuous extrusion production.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "a," "b," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double scraper mechanism for a continuous metal extrusion press, comprising two symmetrically arranged vertical plates, characterized in that: The bottom surface of the upright plate is flat, and the top surface of the upright plate is inclined; it also includes two scraper assemblies, which are used to scrape off molten metal residues adhering to the inner wall of the extrusion wheel groove; One scraper assembly is mounted on the bottom surface of the two uprights via a support plate, and another scraper assembly is mounted on the top surface of the two uprights via a support plate. The scraper assembly includes a support plate with two guide plates symmetrically fixed on it, forming a guide groove between them. A slide plate is slidably mounted inside the guide groove, allowing it to reciprocate linearly along the groove. A scraper is detachably and fixedly mounted at the front end of the slide plate, with its blade extending beyond the guide groove and facing the extrusion wheel. A pressure plate is fixedly connected to the rear end of the slide plate. A screw seat is detachably fixed on the support plate, with an adjusting screw threaded onto it. The end of the adjusting screw presses against the rear side of the pressure plate, and rotating the adjusting screw allows the pressure plate and slide plate to be fed linearly forward and backward. A cover plate is mounted on the top of both guide plates, pressing down on the slide plate to vertically limit its movement and prevent it from detaching from the guide groove.

2. The double scraper mechanism of the continuous metal extrusion press as described in claim 1, characterized in that: Each pallet has two vertical plate limiting grooves arranged side by side. The two vertical plates are installed in the two vertical plate limiting grooves and locked in place by fasteners.

3. The double scraper mechanism of the continuous metal extrusion press as described in claim 2, characterized in that: It also includes a chip removal trough, which is formed between two vertical plates and two support plates. The front end of the chip removal trough is the chip inlet end and the rear end is the chip outlet end, which is used to collect and remove scraped metal chips.

4. The double scraper mechanism of the continuous metal extrusion press as described in claim 3, characterized in that: The front end of the skateboard is provided with a U-shaped scraper groove, which is open to the outside. The scraper is installed in the scraper groove and locked by several fasteners. The blade of the scraper extends out of the scraper groove and the extension length is adjustable.

5. The double scraper mechanism of the continuous metal extrusion press as described in claim 4, characterized in that: The blade of the scraper is set towards the inner wall of the groove of the extrusion wheel. The blade is arc-shaped and the curvature of the arc-shaped blade matches the curvature of the inner wall of the groove of the extrusion wheel. The blade and the inner wall of the groove maintain a preset scraping gap.

6. The double scraper mechanism of the continuous metal extrusion press as described in claim 5, characterized in that: The scraper consists of two separate blades arranged opposite each other, and the distance between the two blades can be adjusted by a spacing adjustment structure. The spacing adjustment structure includes a spacing adjustment hole opened in the scraper groove and fasteners that lock the two blades. The fasteners can be movably inserted into the spacing adjustment hole. Loosening the fasteners can move the relative position of the two blades to adjust the spacing, and locking the fasteners can position and fix the two blades.

7. The double scraper mechanism of the continuous metal extrusion press as described in claim 1, characterized in that: The cover plate is fixed to the guide plate by multiple fasteners. The cover plate and the skateboard are fitted with a gap to limit the vertical bounce of the skateboard and ensure the smoothness of the skateboard's movement.

8. The double scraper mechanism of the continuous metal extrusion press as described in claim 2, characterized in that: The chip discharge trough has an inclined structure, which allows metal chips to slide off automatically under its own weight.

9. The double scraper mechanism of the continuous metal extrusion press as described in claim 6, characterized in that: Two fixing plates are symmetrically installed on the rear end plane of one of the trays.

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