Reverse bottom-removing cold heading die for chain roller
By designing a reverse cold heading die for chain rollers, and utilizing the cooperation of the front and rear punches to form the inner hole of the rollers, the problems of inner wall tearing and dimensional variation in chain rollers during the forward heading process were solved, thereby improving the surface quality and dimensional accuracy of the inner hole.
Patent Information
- Application Number
- CN202423026643.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In the existing technology, chain rollers are prone to inner wall tearing and large variation in inner hole size during the forward bottoming process, resulting in poor inner hole surface quality.
A chain-driven roller reverse cold heading die is used to form the inner hole of the roller through the cooperation of the front and rear punches. The design of components such as the forming die, front punch, rear punch, and rear punch sleeve improves the surface quality and dimensional accuracy of the inner hole of the roller.
It effectively removes the tear band on the inner wall of the roller, improves the surface quality of the inner hole, reduces dimensional variation, and improves machining accuracy.
Smart Images
Figure CN223655959U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold heading mold technology, specifically to a cold heading mold for chain rollers to reverse the bottom. Background Technology
[0002] Current processing methods all use forward bottom removal, which directly extrudes the internal chip generated after the roller is extended through a punch. The process is simple, but tearing bands will be generated inside the roller at the original chip location, resulting in large variation in inner hole size and poor inner hole surface quality. Utility Model Content
[0003] 1. Technical problem to be solved by the utility model
[0004] The purpose of this invention is to solve the technical problems existing in the prior art and to provide a reverse cold heading mold for rollers used in chains, which can improve the surface quality of the inner hole of the roller, eliminate the problem of tear bands on the inner wall of the roller and the problem of large variation in the inner hole size.
[0005] 2. Technical Solution
[0006] To solve the above problems, the technical solution provided by this utility model is as follows:
[0007] A cold heading die for reverse roller bottom removal of a chain includes a forming die, a front punch and a rear punch, wherein the diameter of the rear punch is a, the front punch has a hollow cavity with a diameter of a, and a rear punch tube sleeve is movably sleeved on the rear punch.
[0008] Optionally, the rear punch is provided with a rear punch pusher block.
[0009] Optionally, a raised ring is provided inside the front punch near its front end.
[0010] Optionally, it also includes a rear punch sleeve propeller for actuating the movement of the rear punch sleeve.
[0011] Optionally, the rear punch pusher block is provided with a guide hole that cooperates with the rear punch tube sleeve pusher.
[0012] Optionally, a rear punch tube sleeve push block is connected to the rear end of the rear punch tube sleeve, and the rear punch tube sleeve push rod abuts against the rear punch tube sleeve push block.
[0013] Optionally, the molding die is made of tungsten steel.
[0014] 3. Beneficial effects
[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0016] The utility model discloses a front punch rod and rear punch rod cooperate to form the inner hole of the roller, can improve the surface quality of the inner hole of the roller, remove the tearing belt problem of the inner wall of the roller and the big size dispersion problem of the inner hole. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 A structure schematic diagram of the reverse bottom-removing cold upsetting die for the roller of the chain is provided for the utility model embodiment.
[0018] 1, forming die;2, front punch rod;3, rear punch rod;4, hollow chamber;5, rear punch rod sleeve;6, rear punch rod propelling block;7, convex ring;8, rear punch rod sleeve propelling rod;9, guide hole;10, rear punch rod sleeve propelling block. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model is further explained in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and do not limit the protection scope of the utility model.
[0020] It should be noted that when an element is referred to as "fixed to", "provided on", "fixed on" or "arranged on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. Further, when an element is considered to be "fixedly connected" to another element, the two can be fixed in a detachable manner or in a non-detachable manner, such as sleeving, clamping, integrally forming, welding, etc., which can be achieved in the prior art and will not be described here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is perpendicular, but due to manufacturing and assembly, there can be a certain vertical error. The terms "perpendicular", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0022] In the utility model, "first" and "second" do not represent the specific number and order, but are only used to distinguish the names.
[0023] The drawingsFigure 1 The chain roller reverse bottom cold upsetting die of the embodiment comprises a forming die 1, a front punch 2 and a rear punch 3, the forming die 1 is internally provided with a forming cavity, the diameter of the rear punch 3 is a, the front punch 2 is internally provided with a hollow cavity 4 with a diameter of a, the rear punch 3 can extend into the front punch 2, the rear punch 3 is movably sleeved with a rear punch sleeve 5, and the outer diameters of the front punch 2 and the rear punch sleeve 5 are matched with the inner diameter of the forming die 1.
[0024] The working principle of the chain roller reverse bottom cold upsetting die is as follows: the main die and the punch are respectively installed on a cold upsetting machine, the roller with a core is pushed into the forming die 1 by the front punch 2, the roller core is extruded from the inside of the roller to the hollow cavity 4 in the inside of the front punch 2 by the rear punch 3, and then is discharged through an internal pipeline, the front punch 2 is withdrawn from the forming die 1, and the roller is pushed out of the forming die 1 by the rear punch sleeve 5.
[0025] The inner hole of the roller can be formed by cooperation of the front punch 2 and the rear punch 3, the surface quality of the inner hole of the roller can be improved, and the problems of tearing of the inner wall of the roller and large size dispersion of the inner hole can be solved.
[0026] As a preferred scheme of the utility model, the rear punch 3 is provided with a rear punch pushing block 6, the size of the rear punch pushing block 6 is greater than the diameter of the rear punch 3, and the rear punch pushing block 6 first bears force and then transmits the force to the rear punch 3.
[0027] As a preferred scheme of the utility model, a ring 7 is arranged at a position close to the front section of the front punch 2, the inner diameter of the ring 7 is less than the inner diameter of the front punch 2, so that the core has certain resistance when entering the hollow cavity 4, and the cold upsetting effect is better.
[0028] As a preferred scheme of the utility model, in order to push the rear punch sleeve 5 to move relative to the rear punch 3, a rear punch sleeve pushing rod 8 for pushing the rear punch sleeve 5 to move is further arranged.
[0029] As a preferred scheme of the utility model, the rear punch pushing block 6 is provided with a guide hole 9 matched with the rear punch sleeve pushing rod 8, the axis of the guide hole 9 is parallel to the axis of the rear punch 3, and the arrangement of the guide hole 9 can ensure that the rear punch sleeve pushing rod 8 can only move back and forth in the moving direction of the rear punch sleeve.
[0030] As a preferred scheme of the utility model, in order to avoid that the rear punch sleeve pushing rod 8 is too close to the rear punch 3 and affects operation, the rear end of the rear punch sleeve 5 is connected with a rear punch sleeve pushing block 10, the size of the rear punch sleeve pushing block 10 is greater than the diameter of the rear punch sleeve 5, and the rear punch sleeve pushing rod 8 is in abutting cooperation with the rear punch sleeve pushing block 10.
[0031] As a preferred scheme of the utility model, the forming die 1 is made of tungsten steel.
[0032] The above describes the utility model and its embodiments in a schematic way, which is not restrictive, and the drawings only show one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should all belong to the protection scope of the utility model.
Claims
1. A roll reverse upset cold header for chain characterized by: It comprises a forming die, a front punch and a rear punch, the diameter of the rear punch is a, the front punch is provided with a hollow cavity with a diameter of a, and the rear punch is movably sleeved with a rear punch sleeve.
2. A roll reverse upset die for chain as claimed in claim 1, wherein: The rear punch is provided with a rear punch pushing block.
3. A roll reverse upset die for chain as claimed in claim 1, wherein: The front punch is provided with a convex ring near the front end.
4. A roll reverse upset die for chain as claimed in claim 2, wherein: It also comprises a rear punch sleeve pushing rod for pushing the rear punch sleeve.
5. A roll reverse upset die for chain as claimed in claim 4 wherein: The rear punch pushing block is provided with a guide hole matched with the rear punch sleeve pushing rod.
6. A roll reverse upset die for chain as claimed in claim 5 wherein: The rear end of the rear punch sleeve is connected with a rear punch sleeve pushing block, and the rear punch sleeve pushing rod is in abutting connection with the rear punch sleeve pushing block.
7. A roll reverse upset die for chain links as defined in any one of claims 1 to 6, characterized in that: The forming die is made of tungsten steel.