A side vertical positioning tool for polishing an engineering machinery chassis casting

Abstract

The utility model provides a kind of side vertical positioning tool for engineering machinery chassis casting grinding, including bottom plate, support frame, upper layer, first branch, second branch, third branch and support rod. The first clamping groove of first branch is circumferentially limited to the outer circle base body part of casting, the second clamping groove of second branch is laterally positioned to the lower lug part, the third clamping groove of third branch is matched with the circular table part to realize accurate positioning, and the support rod is matched to support the lateral lug part, forming a multi-dimensional positioning structure, ensuring that the casting is stable and reliable in a side-up state, meeting the precise operation requirements of robot polishing. At the same time, each clamping groove adopts an open upward structure design, and the casting can be placed directly from top to bottom into the positioning tool, making disassembly and assembly operation convenient and effectively improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of casting processing technology, specifically a side-mounted positioning fixture for grinding engineering machinery chassis castings. Background Technology

[0002] In sand casting, burrs are easily formed at the joints of the mold cores, which generally need to be removed by grinding. Traditionally, this is done manually by workers using grinding tools, which is labor-intensive and has low production efficiency. With the development of intelligent manufacturing in factories, the introduction of robotic grinding systems allows industrial robots to perform grinding operations on castings according to a set program, significantly improving production efficiency. Factories produce a wide variety of castings, and different castings require suitable positioning fixtures for accurate positioning to ensure precise robot operation. In addition to accurate positioning, the positioning fixtures must also consider the ease of assembly and disassembly of the castings to maximize production efficiency. This utility model provides a side-mounted positioning fixture for grinding engineering machinery chassis castings. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a side-mounted positioning fixture for grinding engineering machinery chassis castings.

[0004] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows: the engineering machinery chassis casting includes an outer circular base portion, an inner ring body is provided on the inner side of the outer circular base portion, a central hole is provided in the center of the inner ring body, a block portion is provided on the side along the axial direction of the outer circular base portion, and lateral convex ears are provided on both sides of the block portion along the length direction, which are radially protruding from the outer periphery of the outer circular base portion. The lateral convex ears are semi-cylindrical, and the axial direction of the lateral convex ears is perpendicular to the axial direction of the outer circular base portion. A downwardly protruding lower convex ear is provided at the middle position of the block portion along the length direction. The length direction of the lower convex ear is parallel to the axial direction of the outer circular base portion. A downwardly protruding frustum is provided on the lower convex ear near the lower surface of the outer circular base portion.

[0005] A side-mounted positioning fixture for grinding castings of engineering machinery chassis, including: The base plate has a central positioning hole, and the bottom surface of the base plate is also provided with a concave strip positioning groove, which extends radially outward from the wall of the central positioning hole. A support frame, which is vertically and fixedly installed on the base plate; The upper plate is fixedly installed on the top of the support frame; The first support plate is vertically installed on the upper surface of the upper plate. The first support plate is provided with a first slot with an upward opening. The inner wall of the first slot matches the outer periphery of the outer circular base of the engineering machinery chassis casting. The second support plate is vertically installed on the upper surface of the upper plate. The second support plate is parallel to the first support plate. The second support plate is provided with a second slot with an upward opening. The side wall of the second slot matches the two sides of the lower convex ear of the engineering machinery chassis casting. The third support plate is vertically installed on the upper surface of the upper plate. The third support plate is located between the first support plate and the second support plate. The third support plate is perpendicular to the first support plate and the second support plate. The third support plate is provided with a third slot with an upward opening. The side wall of the third slot is engaged with the side of the frustum of the engineering machinery chassis casting. A support rod is vertically installed on the upper surface of the upper plate. A support rod is provided on each side of the third support plate. The top of the support rod abuts against the bottom surface of the lateral lug of the engineering machinery chassis casting.

[0006] By adopting the technical solution of this utility model, the first slot of the first support plate provides circumferential positioning for the outer circular base of the casting, the second slot of the second support plate provides lateral positioning for the lower convex lug, and the third slot of the third support plate cooperates with the frustum to achieve precise positioning. Combined with the support rod supporting the lateral convex lug, a multi-dimensional positioning structure is formed to ensure that the casting is stable and reliable in the side-standing state, meeting the precision operation requirements of robot grinding. At the same time, each slot adopts an upward-facing structure design, allowing the casting to be directly placed into the positioning fixture from top to bottom, making disassembly and assembly convenient and effectively improving production efficiency.

[0007] Furthermore, the opening of the inner wall of the strip positioning groove of the base plate is provided with an outwardly flared chamfer.

[0008] By adopting the above-mentioned preferred scheme, the outward expansion bevel forms a guide structure, which can guide the positioning key to quickly insert into the strip positioning groove when the base plate is positioned and connected to the mounting base of the robot grinding system, thereby reducing the difficulty of alignment during positioning and installation.

[0009] Furthermore, the opening of the first card slot is arc-shaped, and a recessed portion for making way is provided in the middle of the first card slot.

[0010] Using the above-mentioned preferred solution, the inner wall of the arc-shaped opening is positioned on both sides of the outer circular base, and the concave part in the middle reduces unnecessary contact between the slot and the casting.

[0011] Furthermore, the support frame includes a first rectangular frame and a second rectangular frame that are parallel to each other.

[0012] By adopting the above-mentioned preferred scheme, the rectangular frame structure can effectively reduce the overall weight of the support frame while ensuring the support strength, making it easier to handle and install the tooling.

[0013] Furthermore, a U-shaped locking block is provided above the central positioning hole of the base plate, and a U-shaped groove is provided on the U-shaped locking block. The axis of the semi-circular groove at the bottom of the U-shaped groove is coaxial with the axis of the central positioning hole.

[0014] Using the above-mentioned preferred solution, an eccentric locking block can be set on the mounting base of the robot grinding system. When the positioning fixture is installed, the U-shaped groove of the U-shaped locking block is aligned with the width of the eccentric locking block. After the bottom plate of the positioning fixture passes through the eccentric locking block and fits against the mounting base of the robot grinding system, the eccentric locking block is rotated 90° to complete the fixing of the positioning fixture and the mounting base of the robot grinding system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the structural schematic diagrams of engineering machinery chassis castings.

[0017] Figure 2 This is the second structural schematic diagram of the chassis casting of engineering machinery.

[0018] Figure 3 This is a schematic diagram of the positioning tooling of this utility model.

[0019] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle.

[0020] Figure 5 This is a cross-sectional view of the positioning tooling of this utility model.

[0021] Figure 6 This is a schematic diagram of the casting being positioned and installed on a positioning fixture.

[0022] The numbers and letters in the diagram represent the names of the corresponding components: 10-Engineering machinery chassis casting; 11-Outer circular base; 12-Inner ring; 13-Central hole; 14-Block; 15-Side lug; 16-Lower lug; 17-Frustum. 20-Base plate; 21-Intermediate positioning hole; 22-Strip positioning groove; 221-Chamfer; 23-U-shaped locking block; 231-U-shaped groove; 30-Support frame; 31-First rectangular frame; 32-Second rectangular frame; 40-Upper plate; 50-First support plate; 51-First slot; 52-Concave part; 60-Second support plate; 61-Second slot; 70-Third support plate; 71-Third slot; 80-Support rod; Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , Figure 2 As shown, the engineering machinery chassis casting 10 that needs to be ground includes an outer circular base portion 11. An inner ring body 12 is provided on the inner side of the outer circular base portion 11. A central hole 13 is provided in the center of the inner ring body 12. A block portion 14 is provided on the side of the outer circular base portion 11 along the axial direction. Lateral convex ears 15 that are radially protruding from the outer periphery of the outer circular base portion are provided on both sides of the length direction of the block portion 14. The lateral convex ears 15 are semi-cylindrical. The axial direction of the lateral convex ears 15 is perpendicular to the axial direction of the outer circular base portion 11. A downwardly protruding lower convex ear 16 is provided at the middle position of the length direction of the block portion 14. The length direction of the lower convex ear 16 is parallel to the axial direction of the outer circular base portion 11. A downwardly protruding frustum portion 17 is provided on the lower convex ear 16 near the lower surface of the outer circular base portion.

[0025] like Figures 3-6 As shown, one embodiment of this utility model is: a side-mounted positioning fixture for grinding engineering machinery chassis castings, comprising: The base plate 20 has a central positioning hole 21, and the bottom surface of the base plate 20 is also provided with a concave strip positioning groove 22, which extends radially outward from the hole wall of the central positioning hole 21. The support frame 30 is vertically fixedly installed on the base plate 20; The upper plate 40 is fixedly installed on the top of the support frame 30; The first support plate 50 is vertically installed on the upper surface of the upper plate 40. The first support plate 50 is provided with a first slot 51 with the opening facing upward. The inner wall of the first slot 51 matches the outer periphery of the outer circular base part 11 of the engineering machinery chassis casting. The second support plate 60 is vertically installed on the upper surface of the upper plate 40. The second support plate 60 is parallel to the first support plate 50. The second support plate 60 is provided with a second slot 61 with the opening facing upward. The side wall of the second slot 61 matches the two sides of the lower convex ear 16 of the engineering machinery chassis casting. The third support plate 70 is vertically installed on the upper surface of the upper plate 40. The third support plate 70 is located between the first support plate 50 and the second support plate 60. The third support plate 70 is perpendicular to the first support plate 50 and the second support plate 60. The third support plate 70 is provided with a third slot 71 with the opening facing upward. The side wall of the third slot 71 is matched with the side of the frustum portion 17 of the engineering machinery chassis casting. Support rod 80 is vertically installed on the upper surface of upper plate 40. Support rod 80 is provided on both sides of the third support plate 70. The top of support rod 80 abuts against the bottom surface of the lateral lug 15 of the engineering machinery chassis casting.

[0026] The beneficial effects of adopting the above technical solution are as follows: the first slot of the first support plate provides circumferential positioning for the outer circular base of the casting; the second slot of the second support plate provides lateral positioning for the lower convex lug; and the third slot of the third support plate cooperates with the frustum to achieve precise positioning. Combined with the support rod supporting the lateral convex lug, a multi-dimensional positioning structure is formed, ensuring that the casting is stable and reliable in a side-standing state, meeting the precision operation requirements of robot grinding. At the same time, each slot adopts an upward-facing structure design, allowing the casting to be directly placed into the positioning fixture from top to bottom, making disassembly and assembly convenient and effectively improving production efficiency.

[0027] When batch grinding of the engineering machinery chassis castings described in this application is required, the positioning fixture is first installed on the mounting base of the robot grinding system. The mounting base of the robot grinding system is equipped with a positioning sleeve that mates with the central positioning hole on the base plate and a positioning key that mates with the strip positioning groove on the base plate. The base plate can be locked to the mounting base of the robot grinding system with bolts, or it can be locked with pneumatic or electric tensioning jaws. Then, each engineering machinery chassis casting to be ground is installed onto the positioning fixture. The specific structure of the robot grinding system is not described in this application but can be obtained from existing technology, such as the KINMAC-AS50 robot grinding system manufactured by Dalian Yuyang Industrial Intelligent Co., Ltd. The core configuration of the robot grinding system generally includes an industrial robot and an end effector (grinding wheel), equipped with a force control sensor. The working path of the end effector is preset by programming to grind the castings.

[0028] In some other embodiments of this utility model, the opening of the inner wall of the strip positioning groove 22 of the base plate is provided with an outwardly flared chamfer 221. The beneficial effect of adopting the above technical solution is that the outwardly flared chamfer forms a guiding structure, which can guide the positioning key to be quickly inserted into the strip positioning groove when the base plate is positioned and connected to the mounting base of the robot grinding system, thereby reducing the difficulty of alignment during positioning and installation.

[0029] In some other embodiments of this utility model, the opening of the first slot 51 is arc-shaped, and a recessed portion 52 for clearance is provided in the middle of the first slot 51. The beneficial effect of adopting the above technical solution is that the inner wall of the arc-shaped opening is positioned with the outer circular base, and the recessed portion in the middle reduces unnecessary contact between the slot and the casting.

[0030] In some other embodiments of this utility model, the support frame 30 includes a first rectangular frame 31 and a second rectangular frame 32 that are parallel to each other. The beneficial effect of adopting the above technical solution is that the rectangular frame structure can effectively reduce the overall weight of the support frame while ensuring the support strength, which facilitates the handling and installation of tooling.

[0031] In some other embodiments of this utility model, a U-shaped locking block 23 is provided above the central positioning hole of the base plate 20, and a U-shaped groove 231 is provided on the U-shaped locking block 23. The axis of the semi-circular groove at the bottom of the U-shaped groove 231 is coaxial with the axis of the central positioning hole 21. The beneficial effect of adopting the above technical solution is that an eccentric locking block can be set on the mounting base of the robot grinding system. When the positioning fixture is installed, the U-shaped groove of the U-shaped locking block is aligned with the width of the eccentric locking block. After the base plate of the positioning fixture passes through the eccentric locking block and fits against the mounting base of the robot grinding system, the eccentric locking block is rotated 90° to complete the fixing of the positioning fixture and the mounting base of the robot grinding system.

[0032] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A side-mounted positioning fixture for grinding engineering machinery chassis castings, characterized in that, The engineering machinery chassis casting includes an outer circular base portion, an inner ring body on the inner side of the outer circular base portion, a central hole that passes through the axis at the center of the inner ring body, a block portion on the lateral side of the outer circular base portion along the axial direction, and lateral lug portions that radially protrude from the outer circumference of the outer circular base portion on both sides of the length direction of the block portion. The lateral lug portions are semi-cylindrical, and the axial direction of the lateral lug portions is perpendicular to the axial direction of the outer circular base portion. A downwardly protruding lower lug portion is provided at the middle position of the length direction of the block portion. The length direction of the lower lug portion is parallel to the axial direction of the outer circular base portion. A downwardly protruding frustum portion is provided on the lower lug portion near the lower surface of the outer circular base portion. The positioning fixture includes: The base plate has a central positioning hole, and the bottom surface of the base plate is also provided with a concave strip positioning groove, which extends radially outward from the wall of the central positioning hole. A support frame, which is vertically and fixedly installed on the base plate; The upper plate is fixedly installed on the top of the support frame; The first support plate is vertically installed on the upper surface of the upper plate. The first support plate is provided with a first slot with an upward opening. The inner wall of the first slot matches the outer periphery of the outer circular base of the engineering machinery chassis casting. The second support plate is vertically installed on the upper surface of the upper plate. The second support plate is parallel to the first support plate. The second support plate is provided with a second slot with an upward opening. The side wall of the second slot matches the two sides of the lower convex ear of the engineering machinery chassis casting. The third support plate is vertically installed on the upper surface of the upper plate. The third support plate is located between the first support plate and the second support plate. The third support plate is perpendicular to the first support plate and the second support plate. The third support plate is provided with a third slot with an upward opening. The side wall of the third slot is engaged with the side of the frustum of the engineering machinery chassis casting. A support rod is vertically installed on the upper surface of the upper plate. A support rod is provided on each side of the third support plate. The top of the support rod abuts against the bottom surface of the lateral lug of the engineering machinery chassis casting.

2. The side-mounted positioning fixture for grinding engineering machinery chassis castings according to claim 1, characterized in that, The opening of the inner wall of the strip positioning groove of the base plate is provided with an outwardly flared bevel.

3. The side-mounted positioning fixture for grinding engineering machinery chassis castings according to claim 1, characterized in that, The opening of the first slot is arc-shaped, and the middle position of the first slot is provided with an indentation for making way.

4. The side-mounted positioning fixture for grinding engineering machinery chassis castings according to claim 1, characterized in that, The support frame includes a first rectangular frame and a second rectangular frame that are parallel to each other.

5. The side-mounted positioning fixture for grinding engineering machinery chassis castings according to claim 1, characterized in that, A U-shaped locking block is provided above the central positioning hole of the base plate. The U-shaped locking block is provided with a U-shaped groove, and the axis of the semi-circular groove at the bottom of the U-shaped groove is coaxial with the axis of the central positioning hole.

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