Device for installing a tool holder for changing tools outside the machine

Abstract

The utility model relates to the field of metalworking and can be used in devices for installing, securing, and assembling conical mandrels with replaceable cutting tools outside of metalworking machines, as well as for tightening and loosening the fastening of a cutting tool in a mandrel without loading the machine spindle. The device comprises a base with a support column and a housing connected thereto, having a mounting hole and positioning support elements for accommodating the mandrel, as well as a device for fixing the mandrel. The connection between the support column and the housing is detachable, allowing the housing to rotate relative to the support column, and interacting elements are formed on the housing and the support column, ensuring the fixation of the housing on the support column when the housing is rotated by a predetermined angle. Use of the utility model makes it possible to increase the speed and simplify the process of changing tools. 8 clauses, 12 figs.

Description

[0001] The utility model relates to metalworking, in particular to devices for installing, fixing and assembling conical mandrels with replaceable cutting tools outside metalworking machines, as well as for performing operations of tightening and loosening the fastening of the cutting tool in the mandrel without loading the machine spindle.

[0002] The prior art discloses auxiliary devices for servicing metalworking machines, primarily machines with numerical control, intended for preparing cutting tools outside the machine.

[0003] This is a device in the form of an assembly unit for a conical tool holder (CA 2978417, B23Q 3 / 02, published 02 / 09 / 2018).), comprising a support post carrying a measuring unit, wherein said unit comprises a tool holder mount to which the tool holder is rigidly attached, a measuring unit configured to interact with a conical surface forming part of said tool holder, and a cam element designed to move said measuring unit into a position of interaction with the conical surface of the tool holder, wherein said tool holder mount, the measuring unit and the cam element are connected to each other by a plurality of longitudinally arranged bolts, wherein said bolts are arranged to ensure movement of the measuring unit towards the tool holder and away from it, wherein the cam element is configured to move between a position of interaction with the tool holder and a position of separation from the tool holder.

[0004] The disadvantage of the known solution is its design complexity: it requires a large number of interconnected elements connected by bolts. Furthermore, the design allows only 45° rotation of the mounting assembly and mandrel, making it difficult to insert working components into the mandrel from its reverse side, such as the internal coolant supply tube and the pulley.

[0005] The mandrel clamping device uses a screw clamp, the clamping force of which is adjusted manually by turning it. Using this type of clamping requires time and effort to generate the necessary clamping force to initiate tool changes in the mandrel. Furthermore, using this type of clamping device can result in under- or over-clamping (deformation or damage to the mandrel) during tool changes. Furthermore, frequent tightening and loosening of the screw clamp can cause play, which reduces the reliability of the structure.

[0006] A device for assembling ETL tools is known (https: / / tkt-spb.ru / katalog / osnastka / prisposoblenija / prisposoblenija-dlja-sborki-instrumenta / prisposoblenija_dlja_sborki_instrumenta_etl, manufacturer - EVERMORE MACHINE CO., LTD, Taiwan (see Fig. 11)), comprising a base with a support column with the possibility of fixing it on a workbench or work table using bolts. The support column is rigidly connected to the body, in which a vertical mounting hole is made for installing a conical mandrel. The body is provided with elements for fixing the mandrel from its axial and angular displacement. The fixing elements are a clamping element in the form of an L-shaped bracket with a screw clamp and positioning support elements symmetrically located along the edge of the mounting hole.

[0007] This solution features a simpler design compared to its predecessor. However, the device does not allow for rotation of the housing with the mounting hole, preventing the installation of working elements into the chuck shank on this fixture. Furthermore, a drawback of this device, like its predecessor, is that the chuck must be secured manually by tightening the clamping screw to the required torque.

[0008] Also known is a device for assembling a tool outside the HSK63 machine (https: / / velaxom.ru / katalog / montazhnoe-prisposoblenie-dlya-sborki-instrumenta / hsk63-4300563-tschorn.html, manufacturer TschornGmbH, Germany (see Fig. 12)), comprising a base with a support column, rigidly mounted using a bolted connection on a workbench or desktop. A cylindrical body with a mounting hole for installing and fixing a conical mandrel is rotated to the support column, equipped with a locking system for fixing the mandrel, made in the form of a screw clamp.

[0009] The disadvantage of the known device, like the previous analogs, is the ability to rotate the housing with the mounting hole to the left or right only at an angle of 45° and manual tightening of the screw clamp to the required force.

[0010] This solution is selected as the closest analogue (prototype).

[0011] In analogs, the mounting hole of the housing is intended for the installation of only a certain type of conical collet chuck (cone-shaped mandrel), that is, in known devices there is no provision for the possibility of their use with cone-shaped mandrels of various types.

[0012] The objective of this utility model is to eliminate the shortcomings inherent in analogues.

[0013] The technical result consists in increasing the technological efficiency of the process of changing the tool in the mandrel outside the machine, namely, reducing the time and labor costs, due to the provision of quick fixation of the mandrel in the device and the ability to rotate the mandrel around its axis by 360°.

[0014] The solution to the stated technical problem and the achievement of the stated technical result in a device for installing a mandrel for changing a tool outside a machine tool, containing a base with a support post connected to a housing having a mounting hole with positioning support elements for the mandrel and a device for fixing the mandrel, is ensured by the fact that the connection of the support post and the housing is made detachable, while on the housing and the support post there are elements interacting with each other, ensuring the fixation of the housing on the support post when the housing is rotated by a given angle.

[0015] In particular cases of the implementation of the utility model, the stated problem is solved, and the technical result is achieved due to the following.

[0016] The interacting elements on the body and the support post are made in the form of protruding elements and corresponding mating holes.

[0017] The body has two protruding elements, and the support post has four corresponding holes.

[0018] Four mating holes are located in pairs symmetrically on the horizontal and vertical axes of the end of the support post.

[0019] The body is connected to the support post with the possibility of rotation and fixation relative to it at an angle in 90° increments.

[0020] The mandrel locking device is made in the form of a spring-loaded locking pin installed at an angle to the surface of the housing.

[0021] The mandrel locking device is equipped with a locking device.

[0022] The body is made of a protrusion installed in a hole formed in the support post.

[0023] The support post is equipped with a lock for fixing the housing protrusion in it.

[0024] The ability to detach the housing with the mounting hole from the support column, rotate it 360° in 90° increments and then attach it to the support column helps the operator conveniently and quickly tighten, loosen, assemble and replace the tool in the mandrel from both ends, as well as install the coolant supply tube and the pulley, unlike similar devices, where this is extremely inconvenient or impossible to do due to the ability to rotate the housing with the mounting hole only at an angle of 45°.

[0025] The use of a mandrel locking device in the form of a clamping spring pin ensures quick and reliable fixation of the mandrel in the housing, eliminating the risk of the tool being pulled in when the mandrel is not secured.

[0026] The forced locking device of the mandrel locking device prevents the inadvertent (accidental) retraction of the locking spring pin, which eliminates the possibility of the mandrel shifting when changing the tool, increasing the reliability of the device.

[0027] The design of the mandrel locking device, which contains a spring-loaded locking pin installed at an angle to the surface of the housing, ensures the simultaneous fixation of the mandrel in the radial, axial and angular directions, eliminating the risk of the mandrel falling out of the mounting hole when the housing is rotated.

[0028] The ability to detach the housing with the mounting hole from the support post allows the use of interchangeable housings with mounting holes of different sizes. This expands the device's functionality by allowing the use of various mandrels, particularly conical ones.

[0029] The presence of a protrusion on the body that is fixed from axial displacement in the support post increases the technological efficiency of the process, since the possibility of backlash in the structure is eliminated.

[0030] The proposed device reduces the time and labor costs for changing the tool in the mandrel due to the ability to rotate the housing relative to the support column by 360° in 90° increments, as well as due to the use of a spring-loaded locking pin instead of a manual screw clamp.

[0031] The utility model below is explained by a specific example of its implementation, which is not the only possible one, but clearly demonstrates the possibility of achieving the stated technical result.

[0032] The essence of the device for installing a tool holder for changing a tool outside the machine is shown in the drawings:

[0033] Fig. 1 - device, general view from above and side in projection;

[0034] Fig. 2 - device with the body rotated by 90°, general view from above and from the side in projection;

[0035] Fig. 3 - device, general side view;

[0036] Fig. 4 - device, general side view, longitudinal section;

[0037] Fig. 5 - device, general view from the rear, cross-section B-B (see Fig. 3);

[0038] Fig. 6 - device body with positioning support elements on the surface of the body, general view from above and from the side in projection;

[0039] Fig. 7 - device body with positioning support elements on its surface, top view;

[0040] Fig. 8 - device body, general view from above and from the side in projection;

[0041] Fig. 9 - device body, top view;

[0042] Fig. 10 - photograph of the device with the mandrel installed in it;

[0043] Fig. 11 - analogue;

[0044] Fig. 12 - closest analogue (prototype).

[0045] The following positions are marked on the drawings, showing the structural elements of the device:

[0046] 1 - base,

[0047] 2 - support stand,

[0048] 3 - base holes,

[0049] 4 - support post hole,

[0050] 5 - body,

[0051] 6 - housing projection (shaft),

[0052] 7 - positioning protruding elements of the body,

[0053] 8 - support post counter holes,

[0054] 9 - support post clamp,

[0055] 10 - annular groove on the housing shaft,

[0056] 11 - shaped hole of the retainer,

[0057] 12 - housing mounting hole,

[0058] 13 - bushing,

[0059] 14 - positioning support elements of the mounting hole,

[0060] 15 - mandrel fixing device,

[0061] 16 - spring-loaded locking pin,

[0062] 17 - Mandrel locking device lock.

[0063] A device for mounting a tool changer outside a machine tool comprises a base 1, preferably rectangular, with through-threaded or unthreaded holes 3, into which screws or other fasteners, such as studs, are installed, designed to rigidly attach the base 1 to a work table or bench. The base 1 may also be of other shapes, such as round, square, triangular, diamond-shaped, trapezoidal, polygonal, and other shapes.

[0064] Base 1 is rigidly connected to vertical support column 2. In the preferred embodiment, base 1 and support column 2 are a monolithic structure—a single component. The rigid, monolithic design of base 1 and support column 2 ensures stability during torque transmission when tightening the tool in the mandrel. In certain embodiments, base 1 and support column 2 may be designed as separate components joined by assembly operations.

[0065] A through horizontal opening 4 is formed in the upper central portion of support post 2. In the preferred embodiment, opening 4 is cylindrical (round cross-section). However, it can be made with a square, rectangular, triangular, diamond-shaped, oval, polygonal, or other cross-section.

[0066] The device is provided with a removable housing 5, provided with a projection 6, made, for example, in the form of a shaft (see Fig. 6-9). The diameter of the shaft 6 corresponds to the diameter of the horizontal opening 4 in the support post 2. The projection 6 of the housing 5 can be made rectangular, square, oval, polygonal, triangular or other cross-sectional shape corresponding to the shape of the opening 4 in the support post 2.

[0067] The body 5 with the projection 6 can be made in the form of a single part, or in the form of separate parts connected by assembly operations.

[0068] At least two positioning protruding elements 7 are symmetrically placed on the end side of the housing 5 on both sides of the projection (shaft) 6. At least four mating blind holes 8 are made on the end side of the support column 2, located symmetrically around the horizontal hole 4 for the shaft 6. The shaft 6 is installed in the hole 4 of the support column 2, while the housing 5 is positioned relative to the column 2 by installing the protruding elements 7 of the housing 5 in the holes 8 on the column 2. The placement of the positioning protruding elements 7 of the housing 5 in the corresponding holes 8 of the support column 2 eliminates the rotation of the housing 5 during the process of changing or installing the tool in the mandrel.

[0069] The presence of four mating holes 8, located in pairs on the horizontal and vertical axes of the end of support post 2, allows for rotation and installation of housing 5 relative to the support post at an angle of 90° and 180° to the left or right. In certain embodiments, it is possible to secure the removable housing 5 to post 2 at an angle of less than 90°.

[0070] In particular embodiments of the device, the positioning protruding elements 7 can be made on the support post 2, for example, around the horizontal opening 4, and the corresponding openings 8 on the end wall of the housing 5 around the projection 6.

[0071] The fixation of the projection (shaft) 6 of the removable housing 5 in the opening 4 of the support post 2 in order to prevent its axial displacement is carried out by means of a lock 9 located on the opposite (rear) side of the post 2. At the end of the shaft 6, an annular groove 10 is made, which enters into a shaped opening 11 of the locking element of the lock 9. When the lock 9 is turned, its locking element engages with the annular groove 10 of the shaft 6, thereby excluding the possibility of axial movement of the shaft 6 along the opening 4 of the support post 2 and, accordingly, axial movement of the housing 5 relative to the support post 2.

[0072] In particular embodiments of the device, other options for fastening the housing 5 to the support post 2 are possible, for example, by means of a locking connection, the mating parts of which are located on the end surfaces of the housing 5 and the support post 2. And also, for example, by means of several projections on the housing 5, installed in the mating holes on the support post 2, with the possibility of removing the housing 5, rotating it to the required angle and installing it in the mating holes of the post 2 and fixing it in this position.

[0073] A through mounting hole 12 is made in the housing 5. A replaceable sleeve 13 with a conical inner surface is installed in the hole 12, made of a wear-resistant material, for example, brass, or bronze, or hardened steel with a galvanic coating, ensuring precise centering of the mandrel and reducing wear of the housing 5. In particular embodiments of the device, the mounting hole 12 in the housing 5 can be made completely or partially with a conical surface without the use of the sleeve 13.

[0074] The use of brass as the material for the sleeve 13 prevents the formation of burrs, scratches and chipping of the mandrel cone when it is repeatedly installed in the declared device for tightening or disassembly / assembly.

[0075] Sleeve 13 has modifications, that is, the shape of sleeve 13 is selected for the installation of conical collet chucks (cone-shaped mandrels) of various types: SK (DIN 69871), BT (MAS 403), HSK-A (DIN 69893), HSK-C\HSK-E, HM4X100, Capto.

[0076] The device can be equipped with several housings 5 ​​with mounting holes 12 and bushings 13 for various types of conical mandrels.

[0077] The body 5 is provided with positioning support (stop) elements 14, designed for precise installation of the mandrel in the mounting hole 12, eliminating the rotation of the mandrel, as well as for absorbing radial loads that arise when tightening the mandrel tool.

[0078] In one embodiment, the positioning support (stop) elements 14 are made in the form of at least two rectangular elements protruding above the surface of the housing 5, symmetrically located along the edge of the mounting hole 12 (see Fig. 6, 7). Such an arrangement of the positioning support elements 14 is used, for example, for installing the conical BT (MAS 403) equipment. The positioning support elements 14 can also be made in any other shape, for example, in the form of protruding cylindrical elements, trapezoidal elements.

[0079] In another embodiment, the positioning support (stop) elements 14 are formed inside the mounting hole 12, or inside the sleeve 13 (see Fig. 8, 9). This arrangement of the positioning support elements 14 is used, for example, for installing conical HSK-A (DIN 69893) equipment.

[0080] The housing 5 is provided with at least one device 15 for fixing the mandrel installed in the mounting hole 12 of the housing 5, to prevent its displacement in the axial direction. The fixing device 15 is implemented in the form of a clamping (stopping) spring-loaded pin 16, installed at an angle to the surface of the housing 5. In the preferred embodiment, this angle is 26.5°. The orientation angle of the clamping (stopping) pin 16 can be in the range from 20° to 45°. The pin 16 can also be positioned horizontally, moving along the upper surface of the housing 5, that is, in the transverse direction relative to the mandrel. The end of pin 16, by the pressing force of the spring, rests against the radial groove (slot) on the mandrel, clamping it and not allowing the mandrel to move in the axial direction relative to the mounting hole 12. Manually moving pin 16 downwards allows the mandrel to be removed from the mounting hole 12 in the housing 5.

[0081] The locking device 15 is provided with a locking device 17 that prevents the possibility of accidentally moving the pin 16 downwards, that is, loosening the fixation of the mandrel in the mounting hole 12 during the process of changing the tool, made, for example, in the form of a mechanical safety pin.

[0082] The fixing device 15 can be made in the form of a clamping screw or rotary stop.

[0083] The device for installing the tool holder for changing the tool outside the machine is made of metal without coating or with a coating, which increases the wear resistance and corrosion resistance of the device.

[0084] The device operates as follows.

[0085] The device is installed and secured with fasteners on a work table or workbench.

[0086] A conical mandrel, for example a conical collet chuck, is installed in the mounting hole 12 of the body 5, orienting it so that the recesses on the mandrel coincide with the positioning support elements 14 of the body 5.

[0087] Before installing the mandrel, manually pull down locking pin 16 of locking device 15. After installing the mandrel, release pin 16, which is forced upward by the spring and returns to its original position. This presses pin 16 against the mandrel in mounting bore 12 of housing 5. Locking device 17 is then moved to its operating position.

[0088] Perform the necessary manipulations to change or install a tool, including a cutting tool, into a conical mandrel.

[0089] When it is necessary to install, for example, a pulley into a mandrel, the lock 9 located on the rear side of the support column 2 is turned, releasing the shaft 6 from the locking fixation. The housing 5 is removed from the column 2, turned by an angle of 90° and installed back, introducing the protruding elements 7 of the housing 5 into the holes 8 of the column 2. The free end of the shaft 6 with a circular groove 10 is fixed on the rear side of the support column 2 with the locking element of the lock 9. When it is necessary, for example, to install a tube for the internal supply of a lubricating-cooling liquid, to install or replace replaceable plates, to adjust or set up various boring systems or measuring devices, the housing 5 is similarly removed from the column 2 and turned by 180° and installed back, fixing it in the support column 2.

[0090] After performing manipulations with the mandrel, the lock 17 is moved to the non-working position, the pressure pin 16 is pulled down, the mandrel is removed from the device and installed in the spindle of a metalworking machine, for example, a turning and milling machine.

[0091] If it is necessary to replace the housing 5, suitable for a conical mandrel of a different size, similar operations are performed to remove one housing 5 and install another housing 5 with a different shape of the sleeve 13 of the mounting hole 12.

[0092] The proposed utility model is implemented in the products of the PVNI (off-machine tool adjustment device), manufactured at the enterprise OOO Promstan, Moscow region, Nekrasovsky settlement.

[0093] The device for installing a tool holder for changing tools outside the machine has a simple and easy-to-use design, is characterized by increased reliability in operation, is technologically advanced in manufacture, and can be produced in the conditions of the domestic industry using well-known materials, technologies and well-known production equipment.

[0094] The terms and phrases used in this description: “contains”, “has”, “preferably”, “predominantly”, “in particular”, “may be”, “for example”, and their variations, should not be interpreted as excluding the presence of other materials, parts, structural elements, actions.

Claims

1. A device for installing a mandrel for changing a tool outside a machine tool, comprising a base with a support post and a housing connected to it, having a mounting hole and positioning support elements for placing the mandrel, as well as a device for fixing the mandrel, characterized in that the connection of the support post and the housing is made detachable with the possibility of rotating the housing relative to the support post, while on the housing and the support post there are elements interacting with each other, ensuring the fixation of the housing on the support post when the housing is rotated by a given angle.

2. The device according to paragraph 1, characterized in that the elements interacting with each other on the body and the support post are made in the form of protruding elements and corresponding mating holes.

3. The device according to paragraph 2, characterized in that two protruding elements are made on the body, and four corresponding openings are made on the support post.

4. The device according to paragraph 3, characterized in that four mating holes are located in pairs symmetrically on the horizontal and vertical axes of the end of the support post.

5. The device according to paragraph 1, characterized in that the body is connected to the support post with the possibility of rotation and fixation relative to it at an angle in 90° increments.

6. The device according to paragraph 1, characterized in that the mandrel fixing device is made in the form of a spring-loaded locking pin installed at an angle to the surface of the housing.

7. The device according to paragraph 1, characterized in that the mandrel fixing device is provided with a lock.

8. The device according to claim 1, characterized in that the housing is made with a protrusion located in an opening formed in the support post.

9. The device according to item 8, characterized in that the support post is made with a lock for fixing the housing projection in it.

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