Excess pressure shearing device and extruding machine

Abstract

The utility model provides an excess pressure shearing device and an extruding machine, relates to the technical field of extruding machines, and aims to solve the problem that bars in a die are brought out when excess bars are sheared. The pressure residue shearing device is arranged at an inlet of the extrusion die and comprises a shearing mechanism and a supporting mechanism, the shearing mechanism comprises a shearing assembly and a shearing driving assembly, and the shearing driving assembly is used for driving the shearing assembly to move towards the supporting mechanism; the shearing mechanism and the supporting mechanism are located on the two radial opposite sides of an inlet of the extrusion die respectively, the shearing mechanism and the supporting mechanism are collinear with the inlet of the extrusion die, and the supporting mechanism is configured to abut against the shearing assembly to stop movement of the shearing assembly. The weight, brought out by the shearing assembly, of metal in the flow dividing holes can be reduced or even eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a residual pressure shearing device and an extruder. Background Art

[0002] At present, after the extrusion of metal products, residual shears are used to shear the remaining bar stock at the inlet end of the extruder. The general residual shears use flat blades and have a long action distance, so there is a risk that the raw material (such as aluminum alloy) in the diversion hole will be pulled out, which will cause bubbles in the subsequent extrusion. Utility Model Content

[0003] The first purpose of the utility model is to provide a residual pressing shearing device to solve the technical problem of carrying out the bar material in the mold when the residual bar material is sheared in the prior art.

[0004] The utility model provides a residual pressure shearing device, which is arranged at the entrance of the extrusion die, and includes a shearing mechanism and a supporting mechanism. The shearing mechanism includes a shearing assembly and a shearing driving assembly. The shearing driving assembly is used to drive the shearing assembly to move toward the supporting mechanism. The shearing mechanism and the supporting mechanism are respectively located on radially opposite sides of the entrance of the extrusion die, and the shearing mechanism and the supporting mechanism are colinear with the entrance of the extrusion die, and the supporting mechanism is configured to abut the shearing assembly to stop the movement of the shearing assembly.

[0005] The beneficial effects of the pressure surplus shearing device of the utility model are:

[0006] By arranging the supporting mechanism so that it and the shearing mechanism are located on opposite sides of the entrance of the extrusion die and the three are in a colinear line, the shearing assembly can abut against the supporting mechanism and stop after shearing the remaining bar stock at the entrance of the extrusion die, thereby limiting the movement distance of the shearing assembly, thereby reducing or even eliminating the weight of the metal in the diversion hole brought out by the shearing assembly, and preventing bubbles from being generated in the workpiece during the next processing.

[0007] In an optional technical solution, the support mechanism includes a lifting drive assembly, a guide assembly and a support block, the support block is used to abut against the shearing assembly, the lifting drive assembly is transmission-connected to the support block, and the guide assembly is configured to guide the support block to move in a direction toward or away from the entrance of the extrusion die.

[0008] In an optional technical solution, the lifting drive assembly includes a movable wedge and a roller, the movable wedge having a lifting slope, and the lifting slope is configured as follows: when the movable wedge moves toward the extrusion die, the contact position between the lifting slope and the roller gradually increases; the roller is connected to the lifting slope by rolling friction, and the rolling rotation is arranged on the support block.

[0009] In an optional technical solution, the movable wedge block further has a blocking portion, and the blocking portion is located at the lower end of the lifting slope.

[0010] In an optional technical solution, the shearing assembly includes a residual cutter, which has a shearing edge. A side of the shearing edge facing the extrusion die is parallel to the movement direction of the shearing assembly, and a side of the shearing edge facing away from the extrusion die is set at an acute angle to the movement direction of the shearing assembly.

[0011] In an optional technical solution, the shearing blade has an arc-shaped blade tip, and the curvature radius of the blade tip is consistent with the radius of the remaining bar stock.

[0012] In an optional technical solution, a side of the shearing blade facing away from the extrusion die is a plane.

[0013] In an optional technical solution, an upper portion of a side surface of the support block facing the extrusion die has a supporting slope.

[0014] In an optional technical solution, the supporting inclined surface is configured to be arranged parallel to the shearing edge.

[0015] The second purpose of the utility model is to provide an extruder to solve the technical problem of carrying out the rods in the die when shearing the remaining rods.

[0016] The extruder provided by the utility model comprises an extrusion die and the above-mentioned residual pressure shearing device.

[0017] By arranging the above-mentioned residual pressure shearing device in the extruder, the extruder accordingly has all the advantages of the above-mentioned residual pressure shearing device, which will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments or background technologies of the present invention, the drawings required for use in the embodiments or background technology descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present invention, and ordinary technicians in this field can obtain other drawings based on the provided drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of the residual pressure shearing device provided in the first embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of the residual pressure shearing device provided in the first embodiment of the utility model viewed from another direction;

[0021] Description of reference numerals:

[0022] 100- shearing mechanism; 110- hydraulic transmission rod; 120- overcutting knife; 121- shearing blade; 122- blade tip;

[0023] 200-support mechanism; 210-movable wedge block; 211-lifting slope; 212-blocking part; 220-roller; 230-support block; 231-support slope;

[0024] 300-extrusion die;

[0025] 400-Remaining bar stock. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Embodiment 1:

[0028] Figure 1 A schematic diagram of the structure of the residual pressure shearing device provided in the first embodiment of the utility model; Figure 2 This is a schematic diagram of the structure of the residual pressure shearing device provided in the first embodiment of the utility model viewed from another direction; Figure 1 and Figure 2 As shown, the residual shearing device provided in the first embodiment of the utility model is arranged at the entrance of the extrusion die 300, and includes a shearing mechanism 100 and a supporting mechanism 200. The shearing mechanism 100 includes a shearing assembly and a shearing driving assembly. The shearing driving assembly is used to drive the shearing assembly to move toward the supporting mechanism 200. The shearing mechanism 100 and the supporting mechanism 200 are respectively located on radially opposite sides of the entrance of the extrusion die 300, and the shearing mechanism 100 and the supporting mechanism 200 are collinear with the entrance of the extrusion die 300, and the supporting mechanism 200 is configured to abut the shearing assembly to stop the movement of the shearing assembly.

[0029] By arranging the support mechanism 200 so that it and the shearing mechanism 100 are located on opposite sides of the entrance of the extrusion die 300 and the three are in the same line, the shearing assembly can abut against the support mechanism 200 and stop after shearing the remaining bar stock 400 at the entrance of the extrusion die 300, thereby limiting the movement distance of the shearing assembly, thereby reducing or even eliminating the weight of the metal in the diversion hole brought out by the shearing assembly, and preventing bubbles from being generated in the workpiece during the next processing.

[0030] like Figure 1 and Figure 2As shown, optionally, the support mechanism 200 includes a lifting drive assembly, a guide assembly (not shown in the figure) and a support block 230, the support block 230 is used to abut against the shearing assembly, the lifting drive assembly is transmission-connected to the support block 230, and the guide assembly is configured to guide the support block 230 to move in a direction toward or away from the entrance of the extrusion die 300.

[0031] The support block 230 is driven by the lifting drive assembly to move in a direction toward or away from the entrance of the extrusion die 300. When there is no need to shear the remaining bar stock 400, the support block 230 is moved away from the entrance of the extrusion die 300. When there is a need to shear the remaining bar stock 400, the support block 230 is moved close to the entrance of the extrusion die 300, thereby reducing interference with the movement of the bar stock when the bar stock is not sheared.

[0032] The guide assembly may be a combination of a slider and a slide rail. For example, the slide rail may be disposed on the outer surface of the side wall at the inlet side of the extrusion die 300 , and the slider may be fixedly disposed on the support block 230 .

[0033] In another implementation, the support block 230 may also be moved in other directions, such as perpendicular to the Figure 1 The plane where the map is located can also achieve basically the same effect as the above scheme.

[0034] like Figure 1 and Figure 2 As shown, optionally, the lifting drive assembly includes a movable wedge block 210 and a roller 220, the movable wedge block 210 has a lifting slope 211, when the movable wedge block 210 moves toward the extrusion die 300, the contact position of the lifting slope 211 and the roller 220 gradually rises, the roller 220 is connected to the lifting slope 211 by rolling friction, and the rolling rotation is arranged on the support block 230.

[0035] By providing the movable wedge block 210 with the lifting slope 211, when the movable wedge block 210 moves toward the extrusion die 300, the contact position between the lifting slope 211 and the roller 220 gradually rises to lift the support block 230. By providing the lifting slope 211 to drive the support block 230 to rise, the force of the linear motion of the driving component can be reduced, which is conducive to reducing the volume of the driving component.

[0036] In this embodiment, the movable wedge 210 can be driven by a linear drive component such as a cylinder, a hydraulic cylinder or an electric push rod, and in this embodiment, the moving direction of the movable wedge 210 can be consistent with the direction of extruding the bar into the extrusion die 300. Of course, in another implementation, the moving direction of the movable wedge 210 can be perpendicular to the direction of the rod. Figure 1 The plane where the drawing is located is perpendicular to the shearing direction and the extrusion direction of the shearing mechanism 100.

[0037] like Figure 1 As shown, optionally, the movable wedge 210 further has a blocking portion 212 , and the blocking portion 212 is located at the lower end of the lifting slope 211 .

[0038] By providing a blocking portion 212 at the lower end of the lifting slope 211, the roller 220 can be limited to the lowest position of the lifting slope 211. When the movable wedge block 210 is away from the extrusion die 300, the roller 220 moves to contact the blocking portion 212, thereby limiting the lowest movement position of the support block 230 and preventing the support block 230 from falling.

[0039] Specifically, in this embodiment, the movable wedge block 210 moves to the right side in the figure, which is the direction in which the movable wedge block 210 moves away from the extrusion die 300. Figure 1 As shown, the movable wedge 210 moves to a position farther from the extrusion die 300 , and the roller 220 approaches but does not contact the blocking portion 212 .

[0040] The blocking portion 212 in this embodiment may be a ridge, the length direction of which is perpendicular to Figure 1 The direction of the image, that is, the length direction of the ridge is perpendicular to the shearing direction and the extrusion direction of the shearing mechanism 100.

[0041] like Figure 1 and Figure 2 As shown, optionally, the shearing assembly includes a residual cutter 120, which has a shearing edge 121, a side of the shearing edge 121 facing the extrusion die 300 is parallel to the movement direction of the shearing assembly, and a side of the shearing edge 121 facing away from the extrusion die 300 is set at an acute angle to the movement direction of the shearing assembly.

[0042] By providing a residual cutter 120 with a shearing blade 121, the contact area with the remaining bar stock 400 can be reduced. After the shearing blade 121 passes over the bar stock, since the other side of the shearing blade 121 is set at an acute angle to the movement direction of the shearing component, the material is confined to the shearing blade 121 at most, which significantly reduces the area where the bar stock can be attached, thereby reducing or even eliminating the total amount of bar stock taken away by the residual cutter 120, thereby preventing the generation of bubbles during the next extrusion process.

[0043] Specifically, in this embodiment, the side surface of the shearing blade 121 facing away from the extrusion die 300 can form an angle less than 30° with the movement direction of the shearing component, that is, the angle between the two surfaces of the shearing blade 121 is less than 30°. Furthermore, it can be an angle greater than 25° and less than 30°, that is, the angle between the two surfaces of the shearing blade 121 is less than 30° and greater than 25°.

[0044] In addition, in this embodiment, the shearing drive assembly includes a hydraulic transmission rod 110 and a shearing actuator cylinder not shown in the figure, and the upper part of the residual cutter 120 can be connected to the hydraulic transmission rod 110, and the hydraulic transmission rod 110 can be connected to a shearing actuator cylinder such as a hydraulic cylinder.

[0045] like Figure 1 and Figure 2 As shown, optionally, the shearing blade 121 has an arc-shaped blade tip 122 , and the curvature radius of the blade tip 122 is consistent with the radius of the remaining bar stock 400 .

[0046] By setting the blade tip 122 to be an arc shape and the radius of curvature to be consistent with the radius of the remaining bar 400, when shearing the remaining bar 400, all parts of the blade tip 122 of the shear blade 121 can contact the surface of the remaining bar 400 at the same time, avoiding some positions contacting first and some positions contacting later, thereby improving the shearing quality.

[0047] like Figure 1 As shown, optionally, a side of the shearing edge 121 facing away from the extrusion die 300 is a plane.

[0048] The side surface of the shearing blade 121 is set as a plane, which facilitates the processing of the shearing blade 121 and reduces the manufacturing cost of the shearing blade 121.

[0049] like Figure 1 As shown, optionally, the support block 230 and the upper portion of a side surface facing the extrusion die 300 have a support slope 231 .

[0050] By providing the support slope 231 , the release area when the overcutting cutter 120 contacts the support block 230 can be increased, and the impact when the overcutting cutter 120 contacts the support block 230 can be reduced, which is beneficial to improving the service life of the overcutting cutter 120 .

[0051] like Figure 1 As shown, optionally, the support slope 231 is configured to be arranged parallel to the shearing edge 121.

[0052] The supporting inclined surface 231 is arranged parallel to the shearing blade 121 , so as to maximize the contact area between the shearing blade 121 and the supporting inclined surface 231 , reduce the pressure during contact, and further increase the service life of the residual pressure cutter 120 .

[0053] The operating principle of this embodiment is:

[0054] In this embodiment, when the extruder is running, the movable wedge block 210 is located far away from the extrusion die 300, that is, Figure 1 Due to the effect of gravity, the roller 220 rolls on the lifting slope 211, so that the support block 230 is in a lower position.

[0055] When it is necessary to shear the remaining bar stock 400 at the entrance of the extrusion die 300, the movable wedge block 210 is moved toward the extrusion die 300. Under the action of the lifting slope 211 and the guidance of the guide assembly, the support block 230 moves upward, thereby reducing the distance between the support block 230 and the entrance of the extrusion die 300. The residual cutter 120 moves downward under the action of the shearing drive assembly, and the tip 122 of the shearing blade 121 contacts the remaining bar stock 400 and cuts off the remaining bar stock 400. After the tip 122 passes over the remaining bar stock 400, it continues to move downward, contacts the support slope 231 after a short distance, and stops moving. Therefore, on the one hand, only the tip 122 may adhere to the bar stock, the adhesion area is reduced, and the pulling force on the material is reduced. On the other hand, due to the shortened movement distance, the possibility of taking the material out of the diversion hole is also reduced or even eliminated.

[0056] Embodiment 2:

[0057] Embodiment 2 also provides an extruder, comprising the above-mentioned residual pressure shearing device.

[0058] By arranging the above-mentioned residual pressure shearing device in the extruder, the extruder accordingly has all the advantages of the above-mentioned residual pressure shearing device, which will not be described one by one here.

[0059] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

[0060] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0061] In the above embodiments, the descriptions of directions such as “upper” and “lower” are all based on the drawings.

[0062] The above description of the disclosed embodiments enables professionals in the field to implement or use the utility model. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model.

[0063] Therefore, the present invention will not be limited to the embodiments shown herein but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A residual pressure shearing device, arranged at the entrance of an extrusion die (300), characterized in that: The invention comprises a shearing mechanism (100) and a supporting mechanism (200), wherein the shearing mechanism (100) comprises a shearing assembly and a shearing driving assembly, wherein the shearing driving assembly is used to drive the shearing assembly to move toward the supporting mechanism (200); the shearing mechanism (100) and the supporting mechanism (200) are respectively located on two radially opposite sides of the entrance of the extrusion die (300), and the shearing mechanism (100) and the supporting mechanism (200) are colinear with the entrance of the extrusion die (300), and the supporting mechanism (200) is configured to abut against the shearing assembly to stop the movement of the shearing assembly.

2. The residual pressure shearing device according to claim 1, characterized in that: The support mechanism (200) comprises a lifting drive assembly, a guide assembly and a support block (230); the support block (230) is used to abut against the shearing assembly; the lifting drive assembly is transmission-connected to the support block (230); and the guide assembly is configured to guide the support block (230) to move in a direction toward or away from the entrance of the extrusion die (300).

3. The pressure shearing device according to claim 2, characterized in that: The lifting drive assembly comprises a movable wedge block (210) and a roller (220), wherein the movable wedge block (210) has a lifting inclined surface (211), and the lifting inclined surface (211) is configured such that: when the movable wedge block (210) moves toward the extrusion die (300), the contact position between the lifting inclined surface (211) and the roller (220) gradually rises; the roller (220) is connected to the lifting inclined surface (211) by rolling friction, and the rolling rotation is arranged on the support block (230).

4. The residual pressure shearing device according to claim 3, characterized in that: The movable wedge (210) further comprises a blocking portion (212), and the blocking portion (212) is located at the lower end of the lifting slope (211).

5. The residual pressure shearing device according to any one of claims 2 to 4, characterized in that: The shearing assembly comprises a residual pressure cutter (120), wherein the residual pressure cutter (120) has a shearing edge (121), wherein a side of the shearing edge (121) facing the extrusion die (300) is parallel to a movement direction of the shearing assembly, and a side of the shearing edge (121) facing away from the extrusion die (300) is arranged at an acute angle to the movement direction of the shearing assembly.

6. The residual pressure shearing device according to claim 5, characterized in that: The shearing blade (121) has an arc-shaped blade tip (122), and the curvature radius of the blade tip (122) is consistent with the radius of the remaining bar (400).

7. The residual pressure shearing device according to claim 5, characterized in that: A side of the shearing blade (121) facing away from the extrusion die (300) is a plane.

8. The residual pressure shearing device according to claim 5, characterized in that: The upper portion of a side surface of the support block (230) facing the extrusion die (300) has a support slope (231).

9. The residual pressure shearing device according to claim 5, characterized in that: The supporting inclined surface (231) is configured to be arranged parallel to the shearing blade (121).

10. An extruder, characterized in that: The extruder comprises an extrusion die (300) and the residual shearing device according to any one of claims 1 to 9.

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