Material taking and placing device for machine tool spindle

Abstract

The utility model belongs to the technical field of machine tool clamps, and particularly relates to a machine tool spindle material taking and placing device. A machine tool spindle taking and placing device comprises a cutter handle, a transverse plate is arranged on the lower portion of the cutter handle, a clamping air cylinder and a movable block are arranged at the two ends of the transverse plate respectively, and a limiting column is embedded in the upper end face of the movable block; a mounting plate is fixedly connected to the spindle shell, a fixing block is fixedly connected to the lower portion of the mounting plate, a sealing ring is embedded in the lower end face of the fixing block, and a limiting hole matched with the limiting column is formed in the lower end face of the fixing block. The movable block and the fixed block are respectively provided with a plurality of air outlet through holes and air inlet through holes, the air outlet through holes and the air inlet through holes can be communicated with each other, when the cutter handle is installed on a machine tool spindle, the limiting columns are arranged in the limiting holes in a penetrating mode, and an air source sequentially passes through the air inlet through holes and the air outlet through holes and then enters the clamping air cylinder to control the clamping air cylinder. The clamping device is wide in adaptation range to an existing machine tool, adopts an external air source and can prevent a machine tool spindle from rotating randomly when a workpiece is clamped.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool fixtures, in particular to a material taking and placing device for a machine tool spindle. Background Art

[0002] When CNC machine tools perform finish processing on small pieces of metal, it is necessary to manually take out the products to be processed from the tray one by one and place them on the positioning fixture inside the CNC machine tool. After the processing is completed, the products are manually taken back to the tray, which causes high manual fatigue and high labor manufacturing costs.

[0003] Due to the space limitation in CNC machine tools, it is difficult for existing robot arms to automatically pick up and place small metal products. In the prior art, there is a method of carrying and transferring workpieces by installing a clamping mechanism on the spindle of a CNC machine tool. For example, the Chinese invention patent with application number 201910656391 discloses a clamp with a standard tool handle interface, including a clamping handle, an actuator and a clamping claw, the clamping handle is fixed on the actuator, and the clamping handle is a standard tool handle structure that can be connected to the machine tool spindle; the actuator is a pneumatic actuator, the clamping claw is installed on the actuator, and the clamping handle and the actuator are provided with a gas channel. When the clamping handle is connected to the machine tool spindle, the tool loosening air blowing interface / tool ​​internal cooling interface of the machine tool spindle can drive the pneumatic actuator to move through the gas channel, and the pneumatic actuator drives the clamping claw to move to complete the clamping of the workpiece. The fixture does not require an independent driving device, which can simplify the structure of the machine tool. At the same time, the fixture can be placed in the tool magazine when not working, reducing the volume occupied by the fixture.

[0004] However, the fixture of the above patent structure is provided with compressed air by the tool release air blowing interface / tool ​​internal cooling interface of the machine tool spindle. For most domestic CNC machine tools, they do not have a tool internal cooling interface, so they need to be used for specific machine tools and cannot be widely used. In addition, when an external air source is used to control the fixture installed on the machine tool spindle, the fixture will rotate randomly with the machine tool spindle, making it impossible to accurately clamp and move the workpiece. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the present application provides a machine tool spindle loading and unloading device which has a wide adaptability to existing machine tools, adopts an external air source and can avoid random rotation of the machine tool spindle when clamping a workpiece.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A machine tool spindle material taking and releasing device comprises a tool holder detachably mounted on the machine tool spindle, a transverse plate fixedly connected to the lower part of the tool holder, a clamping cylinder fixedly connected to one end of the transverse plate, a movable block fixedly connected to the other end of the transverse plate, a plurality of air outlet holes are provided on the movable block, and a limiting column is embedded in the upper end surface of the movable block; a mounting plate is fixedly connected to the spindle housing, a fixed block is fixedly connected to the lower part of the mounting plate, an air inlet hole corresponding to the air outlet hole is provided on the fixed block, a sealing ring is embedded in the lower end surface of the fixed block and a limiting hole matching the limiting column is provided; when the tool holder is mounted on the machine tool spindle, the limiting column is penetrated into the limiting hole, the air inlet hole is connected to the air outlet hole and is sealed by the sealing ring, and the air source enters the clamping cylinder through the air inlet hole and the air outlet hole to control the clamping cylinder.

[0008] Preferably, a multi-section guide through hole is provided on the movable block, the inner diameter of the upper section of the guide through hole is smaller than that of the lower section, a limit block is fixedly embedded in the lower part of the guide through hole, a limit plate is fixedly connected to the limit column, the outer diameter of the limit plate is larger than the inner diameter of the upper section of the guide through hole, the limit column can be slidably penetrated into the guide through hole, the limit spring is sleeved on the limit column and its two ends are respectively abutted against the lower end surface of the limit plate and the upper end surface of the limit block.

[0009] Preferably, a guide cylinder is fixedly embedded in the guide through hole, and the limiting column can be slidably penetrated in the guide cylinder.

[0010] Preferably, a limiting cylinder is fixedly embedded in the limiting hole, and the limiting column can be slidably inserted into the limiting cylinder.

[0011] Preferably, a connecting plate is fixedly connected to the lower end surface of the mounting plate, a guide groove is opened on the lower end surface of the connecting plate, and a guide block is arranged on the upper end surface of the fixing block. When the guide block is inserted into the guide groove, the fixing block and the connecting plate can be fixed together by tightening bolts.

[0012] Preferably, a guide rod is vertically and slidably provided at one end of the horizontal plate on which the clamping cylinder is provided, a limiting head is fixedly connected to the upper end of the guide rod, a fixing plate is fixedly connected to the lower end surface of the guide rod, the clamping cylinder is fixedly connected to the fixing plate, and a buffer spring is sleeved on the guide rod between the fixing plate and the horizontal plate.

[0013] Preferably, clamping cylinders are fixedly connected to both ends of the fixing plate, and each of the clamping cylinders is correspondingly matched with two groups of air inlet holes and air outlet holes.

[0014] Preferably, air blowing cleaning through holes are respectively opened on the fixed block and the movable block.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model can quickly install the device on the machine tool spindle by providing a tool holder that matches the machine tool spindle; the clamping cylinder of the utility model adopts an external air source, is not limited by the compressed air channel structure of the machine tool spindle, and can be applicable to most domestic CNC machine tools; in addition, the utility model provides a movable block and a fixed block, a limit column and a limit hole, when the tool holder is installed on the machine tool spindle, the fixed block and the movable block are quickly connected and the corresponding air inlet holes and air outlet holes on the two are connected, while the external air source controls the clamping cylinder through the air inlet holes and the air outlet holes, the device will not produce random rotation due to the machine tool spindle, thereby improving the clamping and material picking and placing accuracy.

[0017] In addition, compared with the existing manual material picking and placing operations, the utility model realizes a whole set of automatic operations such as automatic material picking and placing of products. The use of this automatic material picking and placing device shortens the working time compared to manual operation, eliminates manual clamping, positioning, and material picking operations, and has a significant effect improvement in production capacity, yield rate, and personnel working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model when it is installed on the main shaft of a machine tool.

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the connection structure between the fixed block and the movable block of the utility model.

[0021] Figure 4 It is a schematic diagram of the top view of the structure of the connection between the fixed block and the movable block of the utility model.

[0022] Figure 5 for Figure 4 Schematic diagram of the AA section structure.

[0023] Figure 6 for Figure 4 Schematic diagram of the BB cross-sectional structure.

[0024] Figure 7 It is a schematic diagram of the exploded structure of the fixed block, the movable block and the connecting plate of the utility model from the first perspective.

[0025] Figure 8 It is a schematic diagram of the exploded structure of the fixed block, the movable block and the connecting plate of the utility model from a second perspective.

[0026] In the figure: 11, machine tool spindle, 12, spindle housing, 2, tool handle, 21, cross plate, 22, guide rod, 23, limit head, 24, fixed plate, 25, buffer spring, 3, clamping cylinder, 4, movable block, 41, connecting hole, 42, limit column, 43, guide through hole, 44, limit block, 45, limit plate, 46, limit spring, 47, guide cylinder, 48, air outlet through hole, 5, mounting plate, 51, connecting plate, 511, guide groove, 6, fixed block, 61, guide block, 62, adjustment hole, 63, limit hole, 64, limit cylinder, 65, air inlet through hole, 66, sealing ring, 67, air blowing cleaning through hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0029] See attached Figure 1 , 2 As shown, a machine tool spindle material taking and unloading device includes a tool handle 2. The upper structure of the tool handle 2 matches the existing machine tool spindle 11, that is, the tool handle 2 can be clamped in the machine tool spindle 11 for easy disassembly and assembly. The machine tool spindle 11 is installed in the spindle housing 12. The structure and corresponding installation relationship of the machine tool spindle 11 and the spindle housing 12 are existing technologies and will not be repeated here.

[0030] A horizontally arranged transverse plate 21 is fixedly connected to the lower part of the tool handle 2 by bolts, and a clamping cylinder 3 is fixedly connected to one end of the transverse plate 21. The clamping cylinder 3 is an existing clamping cylinder structure with clamping claws.

[0031] Specifically, two cross plate through holes (not shown in the figure) are vertically opened at one end of the cross plate 21 where the clamping cylinder 3 is set, and two guide rods 22 are vertically and slidably penetrated in the cross plate through holes, and a limit head 23 is fixedly connected with bolts at the upper end of the guide rod 22. The limit head 23 is arranged above the cross plate 21 and its outer diameter is larger than the inner diameter of the cross plate through hole. A fixing plate 24 that is perpendicular to the cross plate and horizontally arranged is fixedly connected to the lower end surface of the guide rod 22 by bolts. The two clamping cylinders 3 are fixedly connected to the two ends of the fixing plate 24 by bolts, and a buffer spring 25 is sleeved on the guide rod 22 between the fixing plate 24 and the cross plate 21.

[0032] See also Figure 2 , 3 4, the other end of the horizontal plate 21 is fixedly connected with a movable block 4 by bolts. Specifically, two vertical waist-shaped connecting holes 41 are opened on the movable block 4. The bolts are passed through the connecting holes 41 and are threadedly connected to the horizontal plate 21, so that the movable block 4 is fixedly installed on the horizontal plate 21. By setting the connecting holes 41, the height of the movable block 4 relative to the horizontal plate 21 can be adjusted.

[0033] A mounting plate 5 is fixedly connected to the spindle housing 12 at a position corresponding to the upper portion of the movable block 4 by means of bolts. In order to avoid the machine tool spindle 11 , a horizontally arranged connecting plate 51 is fixedly connected to the lower end surface of the mounting plate 5 by means of bolts, and a fixed block 6 is fixedly connected to the lower end surface of the connecting plate 51 .

[0034] Specifically, two guide grooves 511 are provided on the lower end surface of the connecting plate 51 along the length direction of the horizontal plate 21, and a guide block 61 is integrally formed on the upper end surface of the fixed block 6. The guide block 61 can be inserted into the guide groove 511 to facilitate positioning when the guide block 61 is installed on the connecting plate 41. In addition, in order to facilitate adjustment of the relative position between the fixed block 6 and the connecting plate 51, and to facilitate adjustment of the fixed block 6 to match the movable block 4, two waist-shaped adjustment holes 62 are provided on the upper end surface of the fixed block 61 along the length direction of the guide block 61, and the fastening bolts can be inserted into the adjustment holes 62 and threadedly connected to the connecting plate 51.

[0035] See also Figure 5 , 6 As shown in FIGS. 7 and 8, when the tool handle 2 is clamped in the machine tool spindle 11, in order to prevent the material taking and placing device from randomly rotating with the machine tool spindle 11 when the clamping cylinder 4 is controlled by the external air source, a limit column 42 is embedded in the upper end surface of the movable block 4, and a limit hole 63 matching the limit column 42 is opened in the lower end surface of the fixed block 6. When the tool handle 2 is clamped in the machine tool spindle 11, the limit column 42 is inserted into the limit hole 63.

[0036] Specifically, a coaxial and interconnected multi-stage guide hole 43 is provided on the movable block 4, the inner diameter of the upper section of the guide hole 43 is smaller than the lower section thereof, a limit block 44 is fixedly embedded in the lower portion of the guide hole 43 by threaded connection, a limit plate 45 is integrally formed and fixedly connected to the limit column 42, the outer diameter of the limit plate 45 is larger than the inner diameter of the upper section of the guide hole 43, the limit column 42 can be slidably inserted into the guide hole 43, a limit spring 46 is sleeved on the limit column 42, and its two ends are respectively in contact with the lower end surface of the limit plate 45 and the upper end surface of the limit block 44. Through the above structure, a buffering effect can be performed when the limit column 42 is inserted into the limit hole 63.

[0037] Furthermore, in order to facilitate the sliding of the limit column 42 in the guide through hole 43 and the limit hole 63, a guide cylinder 47 is fixedly embedded in the guide through hole 43, and the limit column 42 can be slidably inserted into the guide cylinder 47; a limit cylinder 64 is fixedly embedded in the limit hole 63, and the limit column 42 can be slidably inserted into the limit cylinder 64.

[0038] In order to allow the external air source to enter the clamping cylinder 3 in sequence through the fixed block 6, the movable block 4 and the corresponding connecting pipeline (not shown in the figure), so as to control the clamping and releasing operations of the clamping cylinder 3, the fixed block 6 and the movable block 4 are respectively provided with matching air inlet holes 65 and air outlet holes 48. The "air inlet and air outlet" are non-functionally limited, and their specific functions are determined according to the control gas circuit of the clamping cylinder 3. In order to facilitate the connection between the air inlet hole 65 and the air outlet hole 48, the cross-section of the air inlet hole 65 is an "L"-shaped structure, that is, the pipe joint on the fixed block 6 is arranged on its side, and the outlet of the air inlet hole 65 is arranged on the lower end surface of the fixed block 6 opposite to the movable block 4, and the air outlet hole 48 vertically penetrates the movable block 4 and the corresponding pipe joint is installed on the lower end surface of the movable block 4. Since two clamping cylinders 3 are provided and each clamping cylinder 3 is provided with two vents, in this embodiment, a total of four groups of air inlet holes 65 and air outlet holes 48 are provided. When the tool handle 2 is clamped on the machine tool shaft 11, each group of air inlet holes 65 and air outlet holes 48 are coaxially arranged, and in order to achieve the sealing between each group of air inlet holes 65 and air outlet holes 48 and the outside, a sealing ring 66 is embedded on the lower end surface of the fixing hole 6 outside each group of air inlet holes 65. Therefore, the control system and the external air source can control one clamping cylinder 3 through every two groups of air inlet holes 65 and air outlet holes 48.

[0039] Furthermore, in order to facilitate the blowing of the machining waste on the CNC machine tool worktable, a group of coaxially arranged air blowing cleaning through holes 67 are also opened on the fixed block 6 and the movable block 4. A sealing ring 66 is also arranged on the lower end surface of the fixed block 6 outside the air blowing cleaning through holes 67, and the external air source blows and cleans through the air blowing cleaning through holes 67 on the fixed block 6 and the movable block 4 in turn.

[0040] The working process of the embodiment of the utility model is as follows:

[0041] Install the material taking and unloading device according to the above description, connect the external air source to the air inlet holes 65 on the side of the fixed block 6 through the pipe joints, connect the air outlet holes 48 at the lower end of the movable block 4 to the air vents on the clamping cylinder 3 through the pipe joints and the connecting pipes, and the specific connection method is that every two groups of air inlet holes 65 and air outlet holes 48 control one clamping cylinder 3; in addition, connect the external air source to the air blowing cleaning holes 67 on the side of the fixed block 6 through the pipe joints;

[0042] When the material taking and discharging device is in use, the limiting column 42 is aligned with the limiting hole 63 and the tool handle 2 is installed in the machine tool spindle 11. At this time, the limiting column 42 is inserted into the limiting hole 63, the movable block 4 and the fixed block 6 are in a docking state, and the air paths of each group of air inlet holes 65, air outlet holes 48 and a group of air blowing cleaning holes 67 are connected and isolated from the outside world by the sealing ring 66. After that, after the machine tool spindle 11 is lowered, the control system of the material taking and discharging device controls the external air source through the air inlet holes 65, the air outlet holes 48 and the corresponding clamping cylinder 3 to control the clamping cylinder 3, so as to realize the clamping and releasing of the product by the clamping cylinder 3.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material handling device for a machine tool spindle, comprising a tool handle detachably mounted on the machine tool spindle, characterized in that: A horizontal plate is fixedly connected to the lower part of the knife handle, a clamping cylinder is fixedly connected to one end of the horizontal plate, a movable block is fixedly connected to the other end of the horizontal plate, a plurality of air outlet holes are opened on the movable block, and a limiting column is embedded on the upper end surface of the movable block; A mounting plate is fixedly connected to the spindle housing, a fixing block is fixedly connected to the lower part of the mounting plate, an air inlet hole corresponding to the air outlet hole is opened on the fixing block, a sealing ring is embedded on the lower end surface of the fixing block, and a limiting hole matching the limiting column is opened; When the tool handle is installed on the machine tool spindle, the limit column is inserted into the limit hole, the air inlet hole is connected to the air outlet hole and is sealed by a sealing ring, and the air source enters the clamping cylinder through the air inlet hole and the air outlet hole to control the clamping cylinder.

2. The machine tool spindle material taking and placing device according to claim 1, characterized in that: A multi-section guide through hole is provided on the movable block, the inner diameter of the upper section of the guide through hole is smaller than that of the lower section, a limit block is fixedly embedded in the lower part of the guide through hole, a limit plate is fixedly connected to the limit column, the outer diameter of the limit plate is larger than the inner diameter of the upper section of the guide through hole, the limit column can be slidably penetrated into the guide through hole, the limit spring is sleeved on the limit column and its two ends are respectively abutted against the lower end surface of the limit plate and the upper end surface of the limit block.

3. The machine tool spindle material taking and placing device according to claim 2, characterized in that: A guide cylinder is fixedly embedded in the guide through hole, and the limit column can be slidably penetrated in the guide cylinder.

4. The machine tool spindle material taking and placing device according to claim 2, characterized in that: A limiting cylinder is fixedly embedded in the limiting hole, and the limiting column can be slidably penetrated in the limiting cylinder.

5. The machine tool spindle material taking and placing device according to claim 1, characterized in that: A connecting plate is fixedly connected to the lower end surface of the mounting plate, a guide groove is opened on the lower end surface of the connecting plate, and a guide block is arranged on the upper end surface of the fixing block. When the guide block is inserted into the guide groove, the fixing block and the connecting plate can be fixed together by tightening bolts.

6. The machine tool spindle material taking and placing device according to claim 1, characterized in that: A guide rod is vertically and slidably provided at one end of the horizontal plate on which the clamping cylinder is set, a limiting head is fixedly connected to the upper end of the guide rod, a fixing plate is fixedly connected to the lower end surface of the guide rod, the clamping cylinder is fixedly connected to the fixing plate, and a buffer spring is sleeved on the guide rod between the fixing plate and the horizontal plate.

7. The machine tool spindle material taking and placing device according to claim 6, characterized in that: Clamping cylinders are fixedly connected to both ends of the fixing plate, and each of the clamping cylinders is correspondingly matched with two groups of air inlet holes and air outlet holes.

8. The machine tool spindle material taking and placing device according to claim 1, characterized in that: Air blowing and cleaning through holes are respectively provided on the fixed block and the movable block.

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