A kind of processing frock for wear-resistant steel ring of load wheel

Abstract

A kind of wear-resistant steel ring processing frock for load wheel, it is characterized in that: the processing frock is by three identical frock modules, three frock modules are installed in claw chuck slot of three claw chuck respectively, each frock module includes base and clamping tooth, base is a strip block, the bottom of base is equipped with the ring segment shape tooth matched with three claw chuck, clamping tooth is arranged on base, clamping tooth includes circular arc clamping block and positioning tooth, positioning tooth is arranged at the center position of the bottom of clamping block, and it is perpendicular to clamping block, positioning tooth is the strip block corresponding to base, clamping tooth is positioned by positioning tooth and base, the outer circle of clamping block is equipped with first station on both sides, the inside of clamping block is equipped with second station.The utility model has the advantages of simple structure and reasonable, positioning and clamping are convenient, a set of frock can realize the positioning and clamping of inner circle and outer circle of steel ring, effectively reduce the influence of multiple clamping on machining precision, reduce the deformation of steel ring in holding process at the same time, improve processing efficiency and machining precision.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing technology and relates to a tooling for processing wear-resistant steel rings for load-bearing wheels. Background Technology

[0002] The wheel hubs of light armored vehicles and amphibious equipment operating systems are generally made of aluminum alloy or magnesium alloy. Since aluminum and magnesium alloys have poor wear resistance, wear-resistant steel rings are typically used at the contact points between the wheel hub and the guide teeth. A wear-resistant steel ring is a large-diameter, small-section circular ring with grooves on the inner side. It is a crucial component of the wheel hub, and its quality directly affects the stability of the armored equipment's operating system. During the machining of wear-resistant steel rings, a three-jaw chuck is usually used for clamping, followed by turning of the inner and outer diameters and inner grooves. Traditional chucks with both positive and negative jaws have few clamping points and a small clamping area, resulting in significant deformation and vibration of the steel ring during clamping, greatly affecting the machining accuracy. Furthermore, traditional chucks can only clamp or support from one side, requiring at least two sets of fixtures and three clamping operations for steel ring machining, leading to very low machining efficiency.

[0003] Therefore, it is necessary to develop a tooling for machining wear-resistant steel rings for heavy-duty wheels to reduce steel ring deformation during the clamping process and improve machining accuracy and efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a simple and reasonable tooling for machining wear-resistant steel rings for load-bearing wheels, which is convenient for positioning and clamping, and can effectively reduce the deformation of steel rings during the clamping process, and improve machining efficiency and machining accuracy.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a tooling for processing wear-resistant steel rings for heavy-duty wheels, characterized in that: the tooling is composed of three tooling modules with the same structure, the three tooling modules are respectively installed in the jaw slots of a three-jaw chuck, each tooling module includes a base and clamping teeth, the base is a strip-shaped block, the bottom of the base is provided with annular segment teeth that match the three-jaw chuck, the clamping teeth are set on the base, the clamping teeth include arc-shaped clamping blocks and positioning teeth, the positioning teeth are set at the center of the bottom of the clamping blocks and are perpendicular to the clamping blocks, the positioning teeth are strip-shaped blocks corresponding to the base, the clamping teeth are positioned with the base through the positioning teeth, the outer circles of the clamping blocks are provided with first working positions, and the inner sides of the clamping blocks are provided with second working positions.

[0006] As an improvement, the base has positioning grooves on both sides of the annular teeth, and three bosses are formed sequentially along the length direction on the upper end face of the base. The three bosses are of the same length, and two clamping tooth positioning grooves of the same length are formed between two adjacent bosses. Clamping tooth positioning teeth are protruding along the length direction in the middle of each boss, and clamping tooth fixing holes are opened on the clamping tooth positioning teeth.

[0007] Furthermore, the clamping teeth on each boss are of the same length and are on the same straight line parallel to the length direction of the base, and the clamping teeth fixing holes on the three clamping teeth are threaded holes.

[0008] Furthermore, the width of the positioning tooth is the same as that of the base, the length of the positioning tooth is less than that of the base but greater than that of the clamping block, and a strip groove for the positioning tooth to be inserted is radially recessed at the bottom center of the clamping block. The outer end face of the positioning tooth is an arc surface corresponding to the outer arc surface of the clamping block. The upper end of the positioning tooth is embedded in the strip groove and fixed to the clamping block by means of dimensional fit. The inner end of the positioning tooth extends out of the clamping block. After the clamping tooth is assembled with the base, the inner end of the positioning tooth is flush with the inner end of the base.

[0009] Furthermore, a positioning groove is formed in the middle of the lower end face of the positioning tooth along the length direction. The width of the positioning groove is the same as the width of the clamping positioning tooth on the upper end face of the base. Positioning bosses are provided in the middle of the left and right sides of the lower end face of the positioning tooth. The length of the positioning bosses is the same as the length of the clamping positioning groove.

[0010] Furthermore, the two ends of the positioning boss are chamfered, the inner end of the positioning tooth is provided with a positioning countersunk hole corresponding to the clamping tooth fixing hole near the inner end of the base, the outer end of the positioning tooth and the middle part of the clamping block are provided with positioning countersunk holes corresponding to the clamping tooth fixing hole on the middle boss of the base, and the clamping tooth is fixed to the base by bolts after positioning.

[0011] Furthermore, the first station is a workpiece inner circle support station, and the first station is an arc-shaped step, which is symmetrically arranged on both sides of the outer circle of the clamping block. The first station consists of a workpiece inner circle support surface and an outer circle machining positioning surface. The workpiece inner circle support surface is an arc surface structure, and the outer circle machining positioning surface is a planar structure. The workpiece inner circle support surface and the outer circle machining positioning surface form a 90° angle. The arc diameter of the workpiece inner circle support surface is equal to the inner diameter of the steel ring to be processed.

[0012] Furthermore, the second station is a workpiece outer circle clamping station, which consists of a workpiece outer circle clamping surface and an inner circle machining positioning surface. The workpiece outer circle clamping surface has an arc surface structure, and the inner circle machining positioning surface has a planar structure. The workpiece outer circle clamping surface and the inner circle machining positioning surface form a 90° angle. The diameter of the arc of the workpiece outer circle clamping surface is equal to the outer diameter of the steel ring to be processed.

[0013] Finally, after the three tooling modules are assembled into the jaw slots of the three-jaw chuck, the centers of the arcs of the inner circle support surfaces of the workpieces of the three tooling modules are the same, the centers of the arcs of the outer circle clamping surfaces of the workpieces are the same, the outer circle machining positioning surfaces are in the same plane, and the inner circle machining positioning surfaces are in the same plane.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: A single machining fixture consists of three fixture modules. Each module includes clamping teeth and a base. The clamping teeth are equipped with an inner circle support station and an outer circle clamping station for the workpiece. This single fixture can achieve both the positioning and clamping of the inner and outer circles of the steel ring, effectively reducing the impact of multiple clamping operations on machining accuracy and improving machining efficiency. The evenly distributed 6-point inner circle support design and the 3-panel large-area outer circle clamping scheme significantly reduce the deformation of the steel ring during clamping and the degree of vibration during machining, thus improving machining accuracy. This utility model has a simple and reasonable structure, is convenient for positioning and clamping, and can effectively reduce steel ring deformation during clamping, improving machining efficiency and accuracy. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a structural diagram of the tooling module;

[0017] Figure 3 This is a schematic diagram of the base structure;

[0018] Figure 4 This is a schematic diagram of the clamping teeth structure. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-4 As shown, a tooling for machining wear-resistant steel rings for road wheels is provided. The tooling consists of three tooling modules A with the same structure. The three tooling modules A are respectively installed in the jaw slots of a three-jaw chuck. Each tooling module A includes a base 2 and a clamping tooth 1. The base 2 is a strip-shaped block. The bottom of the base 2 is provided with annular segment teeth 21 that match the three-jaw chuck. The clamping tooth 1 is set on the base 2. The clamping tooth 1 includes an arc-shaped clamping block 11 and a positioning tooth 12. The positioning tooth 12 is located at the center of the bottom of the clamping block 11 and is perpendicular to the clamping block 11. The positioning tooth 12 is a strip-shaped block corresponding to the base 2. The clamping tooth 1 is positioned with the base 2 through the positioning tooth 12. The outer circles of the clamping block 11 are provided with first work positions 111 and the inner sides of the clamping block are provided with second work positions 112.

[0021] The specific structure is as follows: the base 2 and the clamping teeth 1 are made of mold steel. The base 2 has base positioning grooves 22 on both sides of the annular teeth 21. In this embodiment, the width of the annular teeth 21 and the structural dimensions of the base positioning grooves 22 are suitable for a standard Φ630mm three-drill chuck. The upper end face of the base 2 is formed with three bosses 23 in sequence along the length direction. The three bosses 23 are of the same length. Two clamping tooth positioning grooves 24 of the same length are formed between two adjacent bosses 23. A clamping tooth positioning tooth 25 is protruding from the middle of each boss 23 along the length direction. A clamping tooth fixing hole 26 is opened on the clamping tooth positioning tooth 25. The clamping tooth positioning teeth 25 on each boss 23 are of the same length and are on the same straight line parallel to the length direction of the base 1. The clamping tooth fixing holes 26 opened on the three clamping tooth positioning teeth 25 are threaded holes. The width of the positioning tooth 12 is the same as that of the base 2. The length of the positioning tooth 12 is less than that of the base 2 but greater than that of the clamping block 11. A strip-shaped groove for the positioning tooth 12 to be inserted is radially recessed at the bottom center of the clamping block 11. The outer end face of the positioning tooth 12 is an arc surface corresponding to the outer arc surface of the clamping block 11. The upper end of the positioning tooth 12 is fitted into the strip-shaped groove and fixed to the clamping block 11 by dimensional fit. The inner end of the positioning tooth 12 extends out of the clamping block 11. After the clamping tooth 12 is assembled with the base 2, the inner end of the positioning tooth 12 is flush with the inner end of the base 2. A positioning groove 121 is formed in the middle of the lower end face of the positioning tooth 12 along the length direction. The width of the positioning groove 121 is the same as the width of the clamping tooth positioning tooth 25 on the upper end face of the base 2. Positioning bosses 122 are provided in the middle of the left and right sides of the lower end face of the positioning tooth 12. The length of the positioning bosses 122 is the same as the length of the clamping tooth positioning groove 24. The positioning boss 122 has chamfers 123 at both ends. The inner end of the positioning tooth 12 has a positioning countersunk hole 124 corresponding to the tooth fixing hole 25 near the inner end of the base 2. The outer end of the positioning tooth 12 and the middle part of the clamping block 11 have positioning countersunk holes 113 corresponding to the tooth fixing hole 26 on the middle boss 23 of the base 1. After the clamping tooth 1 is positioned, it is fixed to the base 2 by bolts 10 and 20. The first station 111 is the workpiece inner circle support station. The first station 111 is an arc-shaped step, which is symmetrically arranged on both sides of the outer circle of the clamping block 11. The first station 111 consists of the workpiece inner circle support surface 1b and the outer circle machining positioning surface 1a. The workpiece inner circle support surface 1b is an arc surface structure, and the outer circle machining positioning surface 1a is a planar structure. The workpiece inner circle support surface 1b and the outer circle machining positioning surface 1a form a 90° angle. The arc diameter of the workpiece inner circle support surface 1b is equal to the inner diameter of the steel ring to be processed. During clamping, the inner circle of the workpiece forms a 6-point support. The second station 112 is the workpiece outer circle clamping station. The second station 112 consists of the workpiece outer circle clamping surface 2b and the inner circle machining positioning surface 2a. The workpiece outer circle clamping surface 2b has an arc surface structure, and the inner circle machining positioning surface 2a has a planar structure. The workpiece outer circle clamping surface and the inner circle machining positioning surface form a 90° angle. The arc diameter of the workpiece outer circle clamping surface 2b is equal to the outer diameter of the steel ring to be processed. During clamping, the outer circle of the workpiece forms a 3-point clamping.After the three tooling modules A are assembled into the jaw slots of the three-jaw chuck, the centers of the arcs on the inner circle support surface 1b and the outer circle clamping surface 2b of the workpiece are the same. The outer circle machining positioning surface 1a and the inner circle machining positioning surface 2a are in the same plane. The heights of the inner circle support surface 1b and the outer circle clamping surface 2b are equal and are 0.6-0.8 times the workpiece thickness; in this embodiment, it is 0.8.

[0022] The working principle and usage process are as follows:

[0023] Before use, assemble the base 2 and the clamping teeth 1. Position the clamping tooth positioning boss 122 into one of the clamping tooth positioning grooves 24, and engage the clamping tooth positioning teeth 25 at both ends of the groove 24 with the positioning grooves 121 of the positioning teeth 12. Align the positioning countersunk holes 124 and 113 with the corresponding clamping tooth fixing holes 26, and secure them with bolts 20 and 10. Then, install the three assembled tooling modules A into the standard Φ630mm three-drill chuck jaw slots on the lathe. Finally, adjust the tooling to the appropriate size for machining. When machining the outer diameter of the steel ring, use the six first stations 111 of the three tooling modules A to support the inner diameter of the steel ring. When machining the inner diameter of the steel ring, use the three second stations 112 of the three components to clamp the outer diameter of the steel ring.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tooling for machining wear-resistant steel rings for road wheels, characterized in that: The machining fixture consists of three identical fixture modules, which are installed in the jaw slots of a three-jaw chuck. Each fixture module includes a base and clamping teeth. The base is a strip-shaped block with annular teeth at the bottom that match the three-jaw chuck. The clamping teeth are mounted on the base and include arc-shaped clamping blocks and positioning teeth. The positioning teeth are located at the center of the bottom of the clamping blocks and are perpendicular to the clamping blocks. The positioning teeth are strip-shaped blocks corresponding to the base. The clamping teeth are positioned with the base by the positioning teeth. The outer sides of the clamping blocks have first working positions, and the inner side of the clamping blocks has second working positions.

2. The tooling for machining wear-resistant steel rings for road wheels according to claim 1, characterized in that: The base has positioning grooves on both sides of the annular teeth. The upper surface of the base has three protrusions formed in sequence along the length direction. The three protrusions are of the same length. A clamping tooth positioning groove of the same length is formed between two adjacent protrusions. A clamping tooth positioning tooth is protruding in the middle of each protrusion along the length direction. A clamping tooth fixing hole is opened on the clamping tooth positioning tooth.

3. The tooling for machining wear-resistant steel rings for road wheels according to claim 2, characterized in that: The clamping teeth on each boss are of the same length and are on the same straight line parallel to the length direction of the base. The clamping teeth fixing holes on the three clamping teeth are threaded holes.

4. The tooling for machining wear-resistant steel rings for road wheels according to claim 3, characterized in that: The width of the positioning tooth is the same as that of the base, and the length of the positioning tooth is less than that of the base but greater than that of the clamping block. A strip groove for the positioning tooth to be inserted is radially recessed at the bottom center of the clamping block. The outer end face of the positioning tooth is an arc surface corresponding to the outer arc surface of the clamping block. The upper end of the positioning tooth is embedded in the strip groove and fixed to the clamping block by means of dimensional fit. The inner end of the positioning tooth extends out of the clamping block. After the clamping tooth is assembled with the base, the inner end of the positioning tooth is flush with the inner end of the base.

5. The tooling for machining wear-resistant steel rings for road wheels according to claim 4, characterized in that: A positioning groove is formed in the middle of the lower end face of the positioning tooth along the length direction. The width of the positioning groove is the same as the width of the clamping positioning tooth on the upper end face of the base. Positioning bosses are provided in the middle of the left and right sides of the lower end face of the positioning tooth. The length of the positioning bosses is the same as the length of the clamping positioning groove.

6. The tooling for machining wear-resistant steel rings for road wheels according to claim 5, characterized in that: The positioning boss has chamfers at both ends. The inner end of the positioning tooth has a positioning countersunk hole corresponding to the clamping tooth fixing hole near the inner end of the base. The outer end of the positioning tooth and the middle part of the clamping block have positioning countersunk holes corresponding to the clamping tooth fixing hole on the middle boss of the base. After the clamping tooth is positioned, it is fixed to the base by bolts.

7. The tooling for machining wear-resistant steel rings for road wheels according to any one of claims 1 to 6, characterized in that: The first station is the workpiece inner circle support station. The first station is an arc-shaped step, which is symmetrically set on both sides of the outer circle of the clamping block. The first station consists of the workpiece inner circle support surface and the outer circle machining positioning surface. The workpiece inner circle support surface is an arc surface structure, and the outer circle machining positioning surface is a planar structure. The workpiece inner circle support surface and the outer circle machining positioning surface form a 90° angle. The arc diameter of the workpiece inner circle support surface is equal to the inner diameter of the steel ring to be processed.

8. The tooling for machining wear-resistant steel rings for road wheels according to claim 7, characterized in that: The second station is the workpiece outer circle clamping station. The second station consists of the workpiece outer circle clamping surface and the inner circle machining positioning surface. The workpiece outer circle clamping surface is an arc surface structure, and the inner circle machining positioning surface is a planar structure. The workpiece outer circle clamping surface and the inner circle machining positioning surface form a 90° angle. The diameter of the arc of the workpiece outer circle clamping surface is equal to the outer diameter of the steel ring to be processed.

9. The tooling for machining wear-resistant steel rings for road wheels according to claim 8, characterized in that: After the three tooling modules are assembled into the jaw slots of the three-jaw chuck, the centers of the arcs of the inner circle support surfaces of the workpieces of the three tooling modules are the same, the centers of the arcs of the outer circle clamping surfaces of the workpieces are the same, the outer circle machining positioning surfaces are in the same plane, the inner circle machining positioning surfaces are in the same plane, and the heights of the inner circle support surfaces and the outer circle clamping surfaces of the workpieces are equal, which is 0.6 to 0.8 times the thickness of the workpiece steel ring.

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