Roller ring inner hole over-upper-difference compensation auxiliary device and compensation method

Abstract

The invention relates to a roller ring inner hole over-upper-difference compensation auxiliary device and a compensation method. A roller ring inner hole over-upper-difference compensation auxiliary device comprises a shell, the shell is provided with a containing groove with an opening towards one side, an extrusion layer expanding after being heated is arranged in the containing groove, the thickness of the extrusion layer is larger than or equal to the thickness of a to-be-machined roller ring, and the groove depth of the containing groove is larger than or equal to the thickness of the extrusion layer. The circumferential outer wall of the extrusion layer makes contact with or is close to the lateral groove wall of the containing groove, and the inner edge of the section of the extrusion layer is round. According to the device, for the roll collar with small inner hole allowance or slightly out of tolerance of dozens of filaments, a material which can be expanded at high temperature and can be repeatedly used can be used as an extrusion layer, and the outer circle of the roll collar is extruded inwards through force formed by expansion in the sintering process, so that the aims of increasing the inner hole allowance and compensating the inner hole of the roll collar over-upper-difference are achieved. The method has the advantages that the roller ring inner hole over-upper-difference compensation can be realized, and the use cost is lower.

Description

Technical Field

[0001] The invention relates to the field of nonferrous metal processing, and in particular to a roller ring inner hole overrun compensation auxiliary device and a compensation method. Background Art

[0002] Before the next step of processing is carried out on the fired roller ring, if the inner diameter of the blank exceeds the upper tolerance and the processing allowance is insufficient, the blank often needs to be scrapped directly, resulting in material waste. In particular, scrapping of some alloy blanks will lead to a significant increase in costs.

[0003] In order to achieve dimensional tolerance compensation and reduce production costs, a Chinese patent with application number 202221058591.4 discloses a roller ring dimensional tolerance compensation device, including an extruded part and an extruded part, both of which are annular. The extruded part can be deformed by radially inward or radially outward extrusion. When the extruded part is used for radial inward extrusion, the extruded part and the extruded part are matched through the outer wall of the extruded part and the inner wall conical surface of the extruded part; when the extruded part is used for radial outward extrusion, the extruded part and the extruded part are matched through the inner wall of the extruded part and the outer wall conical surface of the extruded part.

[0004] However, the extrusion parts used in the above schemes are all made of graphite. After re-firing, the extrusion parts made of graphite cannot be used to extrude the workpiece again through the sintering high temperature, cannot be used a second time, and the production cost is still high. Summary of the invention

[0005] The object of the present invention is to provide a roller ring inner hole super-up difference compensation auxiliary device which can realize roller ring inner hole super-up difference compensation and has low use cost.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a roller ring inner hole over-and-under compensation auxiliary device, comprising a shell, the shell having a receiving groove opening to one side, an extrusion layer that expands after being heated is arranged in the receiving groove, the thickness of the extrusion layer is greater than or equal to the thickness of the roller ring to be processed, the groove depth of the receiving groove is greater than or equal to the thickness of the extrusion layer, the circumferential outer wall of the extrusion layer is in contact with or adjacent to the lateral groove wall of the receiving groove, and the inner edge of the cross-section of the extrusion layer is circular.

[0007] The device of the present invention can use a reusable material that can expand at high temperature as an extrusion layer for roller rings with small inner hole allowances or slight excess tolerances of several tens of wires. During the sintering process, the force generated by the expansion squeezes the outer circle of the roller ring inward, thereby achieving the purpose of increasing the inner hole allowance and compensating for the excess tolerance of the inner hole of the roller ring.

[0008] Preferably, an isolation layer is provided at the bottom of the receiving groove to prevent adhesion between the roller ring and the bottom of the receiving groove. When the roller ring to be processed is placed in the receiving groove, the roller ring to be processed is supported above the isolation layer.

[0009] Preferably, the thickness of the extrusion layer increases gradually from the inside to the outside. By adjusting the slope, the roller ring can be compressed horizontally inward, the direction of the force can be changed, the extrusion is uniform and the operation is convenient, and the overall size of the inner hole of the roller ring can be reduced. At the same time, it can avoid the situation where the extrusion layer is concave during the sintering process, resulting in a decrease in the force applied to the upper end of the roller ring.

[0010] Preferably, the shell is made of graphite.

[0011] Preferably, the extruded layer is stacked alumina particles.

[0012] The present invention also discloses a method for compensating the overshoot of the inner hole of a roller ring, comprising the following steps: S1. Lay an isolation layer at the bottom of the housing groove; S2. Place the roller ring to be processed in the receiving groove and on the isolation layer; S3. An extruded layer of aluminum oxide particles is filled between the housing and the roller ring to be processed; S4. Clean the aluminum oxide particles on the upper surface of the roller ring to be processed, and make the inner edge of the extrusion layer flush with the upper surface of the roller ring to be processed; S5. Send the shell carrying the roller ring to be processed into a sintering furnace to sinter the roller ring, and finally take out the roller ring.

[0013] Preferably, the isolation layer is a layer of aluminum oxide particles.

[0014] Preferably, the isolation layer includes a first layer of aluminum oxide particles and second aluminum oxide particles laid on the first aluminum oxide particles, and the particle size of the first aluminum oxide particles is smaller than the particle size of the second aluminum oxide particles. Wherein, finer wet aluminum oxide particles are coated on the bottom of the receiving tank, and then dry aluminum oxide particles are sprinkled on top. After sintering is completed, the aluminum oxide particles adhering to the bottom of the receiving tank are scraped off, and the loss of aluminum oxide particles is small.

[0015] Preferably, in step S3, after the extruded layer is filled, the outer wall of the shell is knocked to make the extruded layers more compact.

[0016] The invention has the advantages of being able to realize the overrun compensation of the inner hole of the roller ring and having low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the auxiliary device of the present invention when it is in use. DETAILED DESCRIPTION

[0018] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0019] Depend on Figure 1As shown, this embodiment discloses a roller ring inner hole super-upper difference compensation auxiliary device, including a housing 1, the housing 1 has a receiving groove 10 opened to the upper side, the bottom of the receiving groove 10 is paved with an isolation layer 2 for preventing the roller ring 100 from sticking to the bottom of the receiving groove 10, and the receiving groove 10 is provided with a ring-shaped extrusion layer 3 that expands after being heated, the thickness of the extrusion layer 3 is greater than or equal to the thickness of the roller ring 100 to be processed, the groove depth of the receiving groove 10 is greater than the thickness of the extrusion layer 3, the circumferential outer wall of the extrusion layer 3 is in contact with or adjacent to the lateral groove wall of the receiving groove 10, and the inner edge of the cross section of the extrusion layer 3 is circular. When the roller ring 100 to be processed is placed in the receiving groove 10, the roller ring 100 to be processed is supported above the isolation layer 2.

[0020] The isolation layer 2 includes two layers of aluminum oxide particles, the lower layer is the first aluminum oxide particles, the upper layer is the second aluminum oxide particles, and the particle size of the first aluminum oxide particles is smaller than the particle size of the second aluminum oxide particles. The shell of this embodiment is made of graphite, and the extruded layer 3 is stacked aluminum oxide particles. The thickness of the stacked extruded 3 layers gradually increases from the circumferential inner side to the circumferential outer side.

[0021] This embodiment also discloses a method for compensating the overshoot of the inner hole of a roller ring using the auxiliary device, comprising the following steps: S1. Laying an isolation layer 2 at the bottom of the housing 10 of the housing 1; S2. The roller ring 100 to be processed is placed in the receiving groove 10 and placed on the isolation layer 2, and the gap between the roller ring 100 and the housing 1 is as uniform as possible; S3. Filling an extrusion layer 3 composed of aluminum oxide particles between the housing 1 and the roller ring 100 to be processed; after filling the extrusion layer 3, tapping the outer wall of the housing 1 to make the extrusion layer 3 tighter and the gap between the aluminum oxide particles constituting the extrusion layer 3 tighter; S4. Clean the aluminum oxide particles on the upper surface of the roller ring 100 to be processed, and make the inner edge of the extrusion layer 3 flush with the upper surface of the roller ring 100 to be processed; S5. Send the shell 1 carrying the roller ring 100 to be processed into the sintering furnace, sinter the roller ring 100, and finally take out the roller ring 100; at this time, the aluminum oxide as the upper layer of the extrusion layer and the isolation layer is loose, easy to take out and can be reused, and the layer of aluminum oxide particles adhering to the bottom of the receiving groove can be scraped off and discarded by a scraper.

[0022] The alumina particles of this embodiment can be reused, and the shell made of graphite is not used to contact the roller ring workpiece, and the shell can also be reused, which can further reduce the production cost. The device and method of this embodiment are aimed at roller rings with small inner hole margins or slightly out of tolerance by dozens of wires. The buried alumina particles can be used as an extrusion layer. During the sintering process, the force formed by the expansion of the alumina particles squeezes the outer circle of the roller ring inward, thereby achieving the purpose of increasing the inner hole margin.

Claims

1. A roller ring inner hole super-up differential compensation auxiliary device, comprising a housing, characterized in that: The shell has a receiving groove opened to one side, and an extrusion layer that expands after being heated is arranged in the receiving groove. The thickness of the extrusion layer is greater than or equal to the thickness of the roller ring to be processed. The groove depth of the receiving groove is greater than or equal to the thickness of the extrusion layer. The circumferential outer wall of the extrusion layer is in contact with or adjacent to the lateral groove wall of the receiving groove, and the inner edge of the cross-section of the extrusion layer is circular.

2. The roller ring inner hole super-high difference compensation auxiliary device according to claim 1 is characterized in that: The bottom of the receiving groove is provided with an isolation layer to prevent the roller ring from adhering to the bottom of the receiving groove. When the roller ring to be processed is placed in the receiving groove, the roller ring to be processed is supported above the isolation layer.

3. The roller ring inner hole super-high difference compensation auxiliary device according to claim 1 is characterized in that: The thickness of the extruded layer gradually increases from the inside to the outside.

4. The roller ring inner hole super-high difference compensation auxiliary device according to claim 1 is characterized in that: The shell is made of graphite.

5. The roller ring inner hole super-high difference compensation auxiliary device according to claim 1 is characterized in that: The extruded layer is stacked aluminum oxide particles.

6. A method for compensating the inner hole overshoot of a roller ring using the auxiliary device described in any one of claims 2 to 5, characterized in that The steps include: S1. Lay an isolation layer at the bottom of the housing groove; S2. Place the roller ring to be processed in the receiving groove and on the isolation layer; S3. An extruded layer of aluminum oxide particles is filled between the housing and the roller ring to be processed; S4. Clean the aluminum oxide particles on the upper surface of the roller ring to be processed, and make the inner edge of the extrusion layer flush with the upper surface of the roller ring to be processed; S5. Send the shell carrying the roller ring to be processed into a sintering furnace to sinter the roller ring, and finally take out the roller ring.

7. The method for compensating the overshoot of the inner hole of a roller ring according to claim 6 is characterized in that: The isolation layer is a layer of aluminum oxide particles.

8. The method for compensating the overshoot of the inner hole of a roller ring according to claim 7 is characterized in that: The isolation layer includes a layer of wet first aluminum oxide particles and second aluminum oxide particles laid on the first aluminum oxide particles, wherein the particle size of the first aluminum oxide particles is smaller than the particle size of the second aluminum oxide particles.

9. The method for compensating the overshoot of the inner hole of a roller ring according to claim 6, characterized in that: In step S3, after the extruded layer is filled, the outer wall of the shell is knocked to make the extruded layers more compact.

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