Composite pneumatic positioning material returning device suitable for centerless grinding machine

Abstract

A composite type pneumatic positioning material returning device suitable for a centerless grinding machine is characterized in that a front positioning component is installed at the front end of a tool apron of the centerless grinding machine and comprises a front positioning air cylinder, a front positioning horizontal adjusting plate and a front positioning vertical adjusting plate, and the front positioning horizontal adjusting plate is fixed to the front installation face of the tool apron of the centerless grinding machine through screws; the front positioning vertical adjusting plate is fixed on the front positioning horizontal adjusting plate mounting surface, and the front positioning cylinder is fixed on the front positioning vertical adjusting plate mounting surface; the rear positioning material returning component is installed at the rear end of the centerless grinding machine tool apron and comprises a material returning push rod, a material returning air cylinder and a positioning air cylinder, the material returning push rod is installed in two vertical adjusting plate installation holes through two oilless bearings, and a push rod fixing plate and the tail end of a piston rod of the positioning air cylinder are fixed through a screw and a nut. The tail end of the positioning cylinder barrel is fixed to the tail end of the material returning cylinder piston rod through a transition connecting plate. The pneumatic front positioning device and the positioning material returning device are used for achieving end face grinding and positioning material returning.

Description

Technical Field

[0001] This utility model relates to the field of centerless grinding technology, specifically to a composite pneumatic positioning and unloading device suitable for centerless grinding machines. Background Technology

[0002] With the rapid development of the machinery industry, centerless grinders play an indispensable role in the precision machining of rotating bodies. Automated machining of centerless grinders has become a major trend of the times. Most of the positioning and ejection devices used in conjunction with the tool holders of centerless grinders adopt linear electric cylinders as the drive device, which occupy a large space and have a high cost.

[0003] In view of this, the present invention provides a composite pneumatic positioning and unloading device suitable for centerless grinding machines. Summary of the Invention

[0004] The purpose of this invention is to provide a composite pneumatic positioning and ejection device suitable for centerless grinders. This device addresses the issue that when centerless grinders are used for automated grinding of workpieces with steps or conical surfaces, such as bolts and screws, which require high precision, the positioning and ejection device used with the tool holder is only suitable for the feeding method of loading and ejecting from the front of the machine tool, and is not suitable for the commonly used top-down loading and unloading method. When the end face of the workpiece needs to be ground, a front positioning device is required. This invention adopts a pneumatic front positioning device and a positioning and ejection device to realize end face grinding and positioning and ejection.

[0005] To solve the above-mentioned technical problems, this utility model achieves this through the following technical solution:

[0006] A composite pneumatic positioning and unloading device suitable for centerless grinders, applicable to plunge grinding operations, includes a front positioning component and a rear positioning and unloading component. The front positioning component is installed at the front end of the centerless grinder tool holder and includes a front positioning cylinder, a front positioning horizontal adjustment plate, and a front positioning vertical adjustment plate. The front positioning horizontal adjustment plate is fixed to the front mounting surface of the centerless grinder tool holder by screws for horizontal adjustment of the front positioning component. The front positioning vertical adjustment plate is fixed to the mounting surface of the front positioning horizontal adjustment plate for vertical adjustment of the front positioning component. The front positioning cylinder is fixed to the mounting surface of the front positioning vertical adjustment plate for front-rear adjustment of the front positioning component. The rear end of the front positioning cylinder is connected to a front positioning fixed plate, which is fixedly connected to the front positioning plate. The front positioning plate is used to fix the workpiece being ground.

[0007] The rear positioning and ejection assembly is installed at the rear end of the tool holder of the centerless grinder. The assembly includes an ejection push rod, an ejection cylinder, and a positioning cylinder. The ejection push rod is mounted in the mounting holes of two vertical adjusting plates via two oilless bearings. The ejection push rod slides within the inner ring of the oilless bearings, guiding and supporting the ejection cylinder. The end of the ejection push rod is mounted in a hole via a push rod fixing plate and a push rod adjusting plate, and is fixed with screws. The push rod fixing plate is fixed to the end of the piston rod of the positioning cylinder via a screw nut. The end of the positioning cylinder barrel is fixed to the end of the piston rod of the ejection cylinder via a transition connecting plate. The position of the ejection push rod can be adjusted by adjusting the push rod adjusting rod fixed to the push rod adjusting plate.

[0008] The vertical adjustment plate at the front end is fixedly connected to the horizontal adjustment plate, and the material ejection adjustment rod is installed between the horizontal adjustment plate and the horizontal adjustment fixed plate.

[0009] Furthermore, the adjusting screw of the material ejection adjusting rod is made of 40Cr alloy steel and then subjected to quenching and tempering treatment.

[0010] Furthermore, the front positioning cylinder adopts an Airtac TCM series double-acting triaxial cylinder.

[0011] Furthermore, the ejector rod is made of 40Cr alloy steel, which is then heat-treated and the ends are welded with hard alloy.

[0012] Furthermore, the ejector cylinder adopts an SMC CM series standard double-acting mini cylinder with a nylon accordion cover on the piston rod.

[0013] Furthermore, the positioning cylinder adopts the Airtac MG series standard double-acting mini cylinder.

[0014] Furthermore, a front positioning cylinder cover is installed above the front positioning cylinder.

[0015] Furthermore, a protective cover for the ejector cylinder is installed above the ejector cylinder.

[0016] This utility model has the following features:

[0017] This utility model adopts a unified driving method of compressed air to drive the cylinder, which has strong versatility.

[0018] This utility model includes a pneumatic front positioning device, which can realize end face grinding.

[0019] The piston rod of the ejector cylinder of this utility model includes a nylon bellows cover to protect the piston rod, prevent impurities from entering, and extend its service life.

[0020] The adjusting screw of the rear positioning adjustment device of this utility model is made of 40Cr alloy steel and is treated with heat treatment and blackening. Heat treatment and surface treatment improve service life and meet the requirements of multiple adjustment uses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the front positioning component of this utility model;

[0023] Figure 3 This is a schematic diagram of the rear positioning and unloading component of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of this utility model (with protective cover).

[0025] The markings in the diagram are: 1-centerless grinder tool holder, 2-front positioning component, 3-front positioning cylinder, 4-front positioning plate, 5-centerless grinder tool plate, 6-ejection push rod, 7-ejection cylinder, 8-positioning cylinder, 9-push rod adjusting plate, 10-ejection adjusting rod, 11-push rod adjusting rod, 12-push rod fixing plate, 13-horizontal adjusting plate, 14-vertical adjusting plate, 15-oilless bearing, 16-horizontal adjusting fixing plate, 17-front positioning horizontal adjusting plate, 18-front positioning vertical adjusting plate, 19-front positioning fixing plate, 20-workpiece to be ground, 21-front positioning component cover, 22-ejection component cover, 23-rear positioning ejection component. Detailed Implementation

[0026] The following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a pneumatic composite positioning and unloading device suitable for centerless grinding machines proposed according to this utility model.

[0027] See Figure 1-4 A composite pneumatic positioning and unloading device suitable for centerless grinding machines, applicable to plunge grinding operations, includes a front positioning component 2 and a rear positioning and unloading component 23. The front positioning component 2 is installed at the front end of the tool holder 1 of the centerless grinding machine. The front positioning component 2 includes a front positioning cylinder 3, a front positioning horizontal adjustment plate 17, and a front positioning vertical adjustment plate 18. The front positioning horizontal adjustment plate 17 is fixed to the front mounting surface of the tool holder 1 of the centerless grinding machine by screws and is used for horizontal adjustment of the front positioning component 2. The front positioning vertical adjustment plate 18 is fixed to the mounting surface of the front positioning horizontal adjustment plate 17 and is used for vertical adjustment of the front positioning component 2. The front positioning cylinder 3 is fixed to the mounting surface of the front positioning vertical adjustment plate 18 and is used for front-rear adjustment of the front positioning component 2. The rear end of the front positioning cylinder 3 is connected to a front positioning fixing plate 19, and the front positioning fixing plate 19 is fixedly connected to a front positioning plate 4. The front positioning plate 4 is used to fix the workpiece 20 being ground.

[0028] The rear positioning and ejection component 23 is installed at the rear end of the tool holder 1 of the centerless grinder. The rear positioning and ejection component 23 includes an ejection push rod 6, an ejection cylinder 7, and a positioning cylinder 8. The ejection push rod 6 is installed in the mounting holes of two vertical adjusting plates 14 through two oilless bearings 15. The ejection push rod 6 slides within the inner ring of the oilless bearings 15 to guide and support the ejection cylinder 7. The end of the ejection push rod 6 is installed in the hole through a push rod fixing plate 12 and a push rod adjusting plate 9 and is fixed with screws. The push rod fixing plate 12 is fixed to the end of the piston rod of the positioning cylinder 8 through a screw nut. The end of the cylinder of the positioning cylinder 8 is fixed to the end of the piston rod of the ejection cylinder 7 through a transition connecting plate. The position of the ejection push rod 6 can be adjusted by adjusting the push rod adjusting rod 11 fixed to the push rod adjusting plate 9 to avoid multiple clamping of the ejection push rod 6.

[0029] The vertical adjustment plate 14 at the front end is fixedly connected to the horizontal adjustment plate 13, and the material ejection adjustment rod 10 is installed between the horizontal adjustment plate 13 and the horizontal adjustment fixing plate 16.

[0030] The adjusting screw of the material ejection adjusting rod 10 is made of 40Cr alloy steel and then heat-treated.

[0031] The front positioning cylinder 3 is an Airtac TCM series double-acting three-axis cylinder.

[0032] The ejector rod 6 is made of 40Cr alloy steel and is heat-treated, with hard alloy welded to its ends.

[0033] The ejector cylinder 7 is an SMC CM series standard double-acting mini cylinder with a nylon accordion cover on the piston rod.

[0034] The positioning cylinder 8 is an Airtac MG series standard double-acting mini cylinder.

[0035] A front positioning cylinder cover 21 is installed above the front positioning cylinder 3 to protect the front positioning cylinder 3 and its sensor.

[0036] A protective cover 22 is installed above the ejector cylinder 7 to protect the ejector cylinder 7 and its sensors.

[0037] The aforementioned composite pneumatic positioning and unloading device for centerless grinders is used for automatic feeding and grinding of workpieces with stepped or conical surfaces. Its use includes the following steps:

[0038] Step 1: After the assembly and debugging of the device body, the centerless grinder tool holder 1, the centerless grinder tool plate 5, etc., the whole device is installed in the grinding area of ​​the centerless grinder after debugging. With the corresponding feeding and receiving machine and mechanical gripper, it is ready to start grinding. Before grinding starts, the piston rod of the front positioning cylinder 3 retracts; the piston rod of the ejection cylinder 7 extends; and the piston rod of the positioning cylinder 8 extends.

[0039] Step 2: The loading mechanical gripper picks up a workpiece 20 to be ground and places it into the grinding area of ​​the centerless grinder blade 5. After placement, the loading mechanical gripper retracts, the piston rod of the front positioning cylinder 3 extends, and the front positioning plate 4 reaches the front limit position of the workpiece 20 to be ground. If the workpiece is offset, the front positioning plate 4 will push the workpiece to the correct position to achieve the purpose of front positioning.

[0040] Step 3: After the front positioning plate 4 reaches the front limit position of the workpiece 20 to be ground, the piston rod of the front positioning cylinder 3 remains in the extended state, and the piston rod of the positioning cylinder 8 slowly retracts, driving the ejector push rod 6 to push the workpiece 20 to be ground to the rear limit position. Then the piston rod is pushed out again and remains in the extended state. The piston rod of the front positioning cylinder 3 retracts, the front positioning plate 4 leaves the grinding position, the workpiece to be ground is positioned, the centerless grinder feeds along the Y axis, and the grinding process begins.

[0041] Step 4: After grinding is completed, the piston rod of the ejector cylinder 7 retracts; the piston rod of the positioning cylinder 8 retracts, driving the ejector push rod 6 to push the workpiece out of the grinding area of ​​the centerless grinder blade 5 and into the blanking groove of the machine tool, thus completing the workpiece ejection.

[0042] Step 5: After the workpiece is unloaded, the piston rod of the unloading cylinder 7 is pushed out; the piston rod of the positioning cylinder 8 is pushed out; ready for the next positioning unloading.

[0043] This invention addresses the issue that when centerless grinders are used to automatically grind workpieces with steps or conical surfaces, such as bolts and screws, which require high precision, the positioning and ejection device used with the tool holder is only suitable for the feeding method of loading and ejecting from the front of the machine tool, and is not suitable for the commonly used top-down loading and unloading method. When the end face of the workpiece needs to be ground, a front positioning device is required. This invention adopts a pneumatic front positioning device and positioning and ejection device to realize end face grinding and positioning and ejection.

[0044] Those skilled in the art will understand that the components mentioned in this utility model are components used to perform one or more of the structures, operations, methods, measures, and schemes described in this application. These components may be specifically designed and manufactured for the desired purpose, or they may utilize components known in the mechanical industry or other known equipment. Other undescribed parts involved in this utility model are the same as or implemented using existing technology.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A composite pneumatic positioning and unloading device suitable for centerless grinding machines, applicable to plunge grinding operations on centerless grinding machines, characterized in that: The device includes a front positioning component (2) and a rear positioning ejector component (23). The front positioning component (2) is installed at the front end of the centerless grinder tool holder (1). The front positioning component (2) includes a front positioning cylinder (3), a front positioning horizontal adjustment plate (17), and a front positioning vertical adjustment plate (18). The front positioning horizontal adjustment plate (17) is fixed to the front mounting surface of the centerless grinder tool holder (1) by screws and is used to adjust the front positioning component (2) horizontally. The front positioning vertical adjustment plate (18) is fixed to the mounting surface of the front positioning horizontal adjustment plate (17) and is used to adjust the front positioning component (2) vertically. The front positioning cylinder (3) is fixed to the mounting surface of the front positioning vertical adjustment plate (18) and is used to adjust the front positioning component (2) back and forth. The rear end of the front positioning cylinder (3) is connected to the front positioning fixing plate (19). The front positioning fixing plate (19) is fixedly connected to the front positioning plate (4). The front positioning plate (4) is used to fix the workpiece (20) being ground. The rear positioning ejector component (23) is installed at the rear end of the centerless grinder tool holder (1). The rear positioning ejector component (23) includes an ejector push rod (6), an ejector cylinder (7), and a positioning cylinder (8). The ejector push rod (6) is installed in the mounting holes of two vertical adjustment plates (14) through two oilless bearings (15). The ejector push rod (6) slides in the inner ring of the oilless bearings (15) to guide and support the ejector cylinder (7). The end of the ejector push rod (6) is installed in the hole through the push rod fixing plate (12) and the push rod adjusting plate (9) and fixed with screws. The push rod fixing plate (12) is fixed to the end of the piston rod of the positioning cylinder (8) through a screw nut. The end of the cylinder of the positioning cylinder (8) is fixed to the end of the piston rod of the ejector cylinder (7) through a transition connecting plate. The position of the ejector push rod (6) is adjusted by adjusting the push rod adjusting rod (11) fixed to the push rod adjusting plate (9). The vertical adjustment plate (14) at the front end is fixedly connected to the horizontal adjustment plate (13), and the material ejection adjustment rod (10) is installed between the horizontal adjustment plate (13) and the horizontal adjustment fixing plate (16).

2. The composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: The adjusting screw of the material ejection adjusting rod (10) is made of 40Cr alloy steel and then heat treated.

3. The composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: The front positioning cylinder (3) is an Airtac TCM series double-acting three-axis cylinder.

4. A composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: The ejector rod (6) is made of 40Cr alloy steel and then heat-treated, with hard alloy welded to the end.

5. A composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: The ejector cylinder (7) is an SMC CM series standard double-acting mini cylinder with a nylon accordion cover on the piston rod.

6. A composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: The positioning cylinder (8) adopts the standard double-acting mini cylinder of Airtac MG series.

7. A composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: A front positioning cylinder cover (21) is installed above the front positioning cylinder (3).

8. A composite pneumatic positioning and unloading device suitable for centerless grinding machines as described in claim 1, characterized in that: A material ejection cylinder cover (22) is installed above the ejection cylinder (7).

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