Super-long-diameter-ratio deep-hole multi-step shaft part hot extrusion device with centralizing function

Abstract

The hot extrusion device with the centralizing function for the ultra-long diameter ratio deep-hole multi-step shaft parts comprises a punch mechanism and a lower die and further comprises a centralizing mechanism, the centralizing mechanism comprises two centralizing assemblies, each centralizing assembly comprises a supporting frame, an air cylinder and a paw, the air cylinders are horizontally arranged on the supporting frames, and the paw is arranged on the lower die. The paw is arranged at the telescopic end of the air cylinder. The two supporting frames of the two centralizing assemblies are arranged on the two sides of the upper end of the lower die correspondingly, the telescopic ends of the two air cylinders are opposite in direction, and the two grippers are opposite in direction. By the adoption of the technical scheme, automatic centering of the blank can be accurately and rapidly carried out, the production yield of products is guaranteed, the problems of cost and potential safety hazards caused by manual centering of the blank are solved, and the automation degree of the hot extrusion process of shaft parts can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a hot extrusion device for ultra-long diameter ratio deep-hole multi-step shaft parts with a straightening function. Background Technique

[0002] Shaft parts are one of the most common parts in numerical control machining, mainly used for connection and support, and bear heavy loads and large torques. Shaft parts mainly have a length greater than the diameter, generally including tapered surfaces, holes, threads, spherical surfaces, etc.; structurally, there are mainly plain shafts, stepped shafts, and crankshafts. At present, the processing of ultra-long diameter ratio deep-hole multi-step shaft parts mostly adopts the hot extrusion forming process, and the extruder drives the punch (or extrusion rod) to extrude the blank in the mold.

[0003] In the existing extrusion forming process of ultra-long diameter ratio deep-hole multi-step shaft parts, after the blank is placed in the mold cavity, the blank needs to be straightened so that the punch can accurately extrude the blank, ensuring the smooth progress of the extrusion process and avoiding deviations in the blank during extrusion due to skewing of the blank, resulting in unqualified products and wasting labor and materials. At present, the existing blank straightening methods mostly use manual auxiliary tools such as long rods or scissors (with a fixed block at the front end that fits the blank) for manual straightening, and then release after the punch presses the blank. This manual straightening method requires one or two workers to operate in real time, with a relatively high labor cost and certain safety hazards. Content of the Utility Model

[0004] In order to better solve the above problems, the utility model provides a hot extrusion device for ultra-long diameter ratio deep-hole multi-step shaft parts with a straightening function, which can accurately and quickly straighten the blank and solve the above defects of the manual straightening method.

[0005] To achieve the above object, an embodiment of the utility model provides a hot extrusion device for ultra-long diameter ratio deep-hole multi-step shaft parts with a straightening function, including a punch mechanism and a lower mold, and further including a straightening mechanism. The straightening mechanism includes two groups of straightening components. Each straightening component includes a support frame, a cylinder, and a gripper. The cylinder is horizontally arranged on the support frame, and the gripper is arranged at the telescopic end of the cylinder; the two support frames of the two groups of straightening components are respectively arranged on both sides of the upper end of the lower mold, the telescopic ends of the two cylinders face each other, and the grippers face each other.

[0006] Optionally, the two grippers of the two groups of straightening components are arc-shaped plates facing inward.

[0007] Optionally, the inner side of the arc-shaped plate has an arc-shaped groove that matches the blank to be extruded.

[0008] Optionally, the two groups of straightening components are symmetrically arranged on both sides of the upper end of the lower mold.

[0009] Optionally, it further includes a controller, which is electrically connected to the air source devices of the two cylinders and is used to control the synchronous expansion and contraction of the two cylinders.

[0010] In the hot extrusion device for ultra-long aspect ratio deep-hole multi-step shaft parts with a straightening function according to the embodiment of the present invention, by providing an integrated straightening mechanism on the extrusion device, during the process of blank extrusion forming, two cylinders can drive two claws to approach or move away synchronously through synchronous expansion and contraction, realizing the grasping and releasing actions of the blank, being able to quickly straighten the blank, enabling the punch to accurately extrude the blank, ensuring the processing yield of the product. At the same time, it can solve the cost problem and potential safety hazard problems brought by manual blank straightening, and can also make the blank straightening more standardized.

[0011] Moreover, this hot extrusion device also has the advantages of simple structure, reliable performance, convenient operation, etc., and can accurately and quickly perform automatic blank straightening, which helps to improve the automation degree of the hot extrusion process of shaft parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic structural diagram of the hot extrusion device for ultra-long aspect ratio deep-hole multi-step shaft parts with a straightening function according to the embodiment of the present invention.

[0014] Reference numerals:

[0015] 1. movable crossbeam; 2. punch auxiliary block; 3. punch; 4. blank; 5. claw; 6. cylinder; 7. support frame; 8. lower die; 9. lower ejector rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the matrix embodiments disclosed below.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0018] As Figure 1 shown, the hot extrusion device for ultra-long aspect ratio deep-hole multi-step shaft parts with a straightening function according to an embodiment of the present utility model includes a punch mechanism and a lower die 8. Among them, the punch mechanism includes a movable crossbeam 1, a punch auxiliary block 2, and a punch 3. The punch 3 is connected to an extruder through the movable crossbeam 1 and the punch auxiliary block 2, and can move up and down with the slider at the action end of the extruder. When moving downward, it is used to extrude the blank 4 below. The lower die 8 is located below the punch mechanism and includes a die seat having a lower die cavity. The shape and size of the inner wall of the lower die cavity match the specification size of the shaft part product. The lower die cavity is located directly below the punch 3. After the blank 4 is placed in the lower die cavity, the extruder can be started to drive the punch 3 to extrude the blank 4, and the finished shaft part can be obtained by extrusion molding. A lower ejector rod 9 is provided in the lower die cavity for ejecting the extruded product.

[0019] In the embodiment of the present utility model, the shaft part extrusion device further includes a straightening mechanism for straightening the blank 4 before extrusion, so that the blank 4 is located in the middle position of the lower cavity die and is aligned with the punch 3 directly above, so that the punch 3 can accurately extrude the blank 4. The straightening mechanism includes two groups of straightening components. Each group of straightening components includes a support frame 7, a cylinder 6, and a gripper 5. The support frames 7 of the two groups of straightening components are respectively arranged on both sides of the upper end of the lower die 8. The cylinder 6 is horizontally arranged on the support frame 7, and the gripper 5 is arranged at the telescopic end of the cylinder 6.

[0020] In this straightening mechanism, the telescopic ends of the two cylinders 6 of the two groups of straightening components face each other. That is, the fixed ends of the two cylinders 6 face outward (the side away from the blank placement position or the lower die cavity), and the telescopic ends face inward (the side close to the blank placement position or the lower die cavity). The two grippers 5 are arc-shaped plates, and the inner sides face each other. That is, the outer sides of the two arc-shaped plates are respectively connected to the telescopic ends of the two cylinders 6, and the inner sides face the blank placement position. The inner side of the arc-shaped plate has an arc-shaped groove matching the shape of the blank 4 to be extruded. The two groups of straightening components of this straightening mechanism are symmetric with respect to the central axis direction of the positive placement position of the blank (or the central axis direction of the lower die cavity) as a whole.

[0021] When the hot extrusion device for super-long aspect ratio deep-hole multi-step shaft parts in this embodiment performs extrusion operations, after using a manipulator to place the blank 4 into the lower die cavity, two cylinders 6 extend synchronously, driving two grippers 5 to move inward and approach each other to straighten the blank 4. Then, the extrusion press drives the punch 3 downward until it presses against the blank 4 (the stroke can be controlled by a limit switch). At this time, the two cylinders 6 contract synchronously, driving the two grippers 5 to move outward and away from each other to release the blank 4. Subsequently, the extrusion press drives the punch 3 to continue pressing down until the blank 4 is pressed into shape. Finally, the extrusion press drives the punch 3 to move upward, and the lower ejector rod 9 holds the extruded product in place until it reaches a fixed position. The press stops, and the manipulator removes the formed product, completing the extrusion forming of one blank. Repeat the above steps in a cycle to perform batch extrusion processing of the blanks.

[0022] Optionally, the device further includes a controller and a gas source device. The gas source device is connected to the air inlet and outlet ends of the two cylinders 6, and the controller is electrically connected to the gas source device for controlling the gas source device to supply and inhale gas to the two cylinders 6 synchronously, thereby controlling the two cylinders 6 to expand and contract synchronously and ensuring that the two grippers 5 perform grasping and releasing actions synchronously. The controller can be associated with the extrusion press control system, which helps to achieve fully automated operation of the extrusion process.

[0023] In actual application scenarios, the hot extrusion device of the embodiment of the present utility model can be implemented by modifying an existing extrusion press or extrusion device. For example, the punch mechanism and the lower die 8 can adopt the corresponding equipment in the existing extrusion press or extrusion device, and a straightening mechanism can be installed on the extrusion device. In addition, components such as the grippers 5 and the support frame 7 in the hot extrusion device can be designed accordingly according to the size of the blank 4 to be processed in the actual working conditions, and components such as the cylinders 6 and the controller can adopt equipment with corresponding functions and meeting the specification requirements in the existing technology. In addition, other devices or components can be set in the hot extrusion device, or the actual installation positions of each device or component can be adjusted to realize the actual application or other functions of the hot extrusion device.

[0024] It should be noted that according to the needs of implementation, each component described in the embodiment of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiment of the present utility model.

[0025] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. A hot extrusion device for ultra-long-diameter ratio deep-hole multi-step shaft parts with a straightening function, comprising a punch mechanism and a lower die, characterized in that: It also includes a righting mechanism, which includes two groups of righting components. The righting components include a support frame, a cylinder and a gripper. The cylinder is horizontally arranged on the support frame, and the gripper is arranged at the telescopic end of the cylinder; the two support frames of the two groups of righting components are respectively arranged on both sides of the upper end of the lower mold, the telescopic ends of the two cylinders are oriented oppositely, and the two grippers are oriented oppositely.

2. According to the hot extrusion device for ultra-long-diameter ratio deep-hole multi-step shaft parts with straightening function in claim 1, it is characterized in that: The two claws of the two groups of straightening components are arc-shaped plates facing inwards.

3. The hot extrusion device for ultra-long-diameter-ratio deep-hole multi-step shaft parts with a straightening function according to claim 2 is characterized in that: The inner side of the arc plate is provided with an arc groove matching with the blank to be extruded.

4. The hot extrusion device for ultra-long-diameter-ratio deep-hole multi-step shaft parts with a straightening function according to claim 1 is characterized in that: The two groups of straightening components are symmetrically arranged on both sides of the upper end of the lower mold.

5. A hot extrusion device for ultra-long-diameter-ratio deep-hole multi-step shaft parts with a straightening function according to any one of claims 1 to 4, characterized in that: It also includes a controller, which is electrically connected to the air source devices of the two cylinders and is used to control the synchronous extension and retraction of the two cylinders.

Images