Knife rest of turning and milling combined machine tool

Abstract

The utility model provides a turning and milling composite machine tool knife rest which comprises a movable knife rest body, a knife rest multi-axis motion platform and a knife rest rotation driving mechanism and further comprises a locking knife disc and a locking knife disc driving mechanism. The locking cutterhead driving mechanism is installed on the last stage of the multi-axis motion platform or the tool rest driving and rotating mechanism, the locking cutterhead is fixed to the driving end of the locking cutterhead driving mechanism, and the locking cutterhead driving mechanism is used for driving the locking cutterhead to move in the axial direction of the movable tool rest so as to be close to or away from the movable tool rest; a plurality of locking holes distributed at equal angles are formed in the back face or the front face of the movable knife rest, a plurality of locking shafts are correspondingly arranged on the locking knife disc, and the angle between every two adjacent locking holes is matched with the angle between every two adjacent knives on the movable knife rest. The fit clearance between the locking hole and the locking shaft is smaller than the assembly movement allowance of the movable knife rest rotating shaft, and the locking shaft is matched with the locking hole in an inserted mode. The turning and milling composite machine tool knife rest has the advantage of high stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe technical field, specifically speaking, relate to a kind of turning and milling combined machine tool tool rest. BACKGROUND

[0002] At present, the parts of mining, wind power, nuclear power, ship and other industries need to be turned inner and outer cylindrical surface, milled plane, drilled, tapped, ground inner taper hole, and the previous is completed by multiple equipment cooperation, and the parts need to be clamped, aligned and processed twice, with low processing precision, and the processing of such parts has been a problem in mechanical industry, and under the premise of ensuring the processing precision of parts, the full process of the parts with maximum rotary diameter of 1.6-3.2 meters is realized on one equipment.

[0003] With the update of technology, the specifications of products in nuclear power, large shield machine, offshore oil platform, ship, mine, metallurgy, military industry, port and wharf equipment and other industries are increasing.

[0004] In order to meet these needs, the current numerical control machine tool product develops a turning and milling integrated combined machine tool, and the volume also develops towards large size.

[0005] With the increase of volume, the assembly gap and error of parts are easily enlarged, among which, the tool rest structure is a movable part in turning and milling combined machine tool, which is usually designed as a disc form, and a plurality of different tools are installed in the circumferential direction, when the tool needs to be replaced, the set angle is rotated, so that the tool can be switched to the working position for processing.

[0006] The structure can stably operate on small machine tool with high precision, but when the equipment is enlarged, the action of tool rest rotation is enlarged due to assembly, design and other errors, and the slight vibration of tool rest caused by precision problem is also enlarged, and the precision error will affect the stability of processing after being enlarged from shaft center to outer peripheral surface.

[0007] In order to solve the problem, a new solution needs to be found. UTILITY MODEL CONTENT

[0008] The utility model aims at the deficiency of prior art, and provides a turning and milling combined machine tool tool rest which can ensure the stability of tool rest.

[0009] In order to achieve the above purpose, the utility model adopts the following technical scheme: a turning and milling combined machine tool tool rest, which comprises a movable tool rest, a tool rest multi-axis motion platform and a tool rest rotation driving mechanism, and further comprises a locking tool rest and a locking tool rest driving mechanism.

[0010] The movable tool rest is driven by the tool rest driving rotation mechanism and rotates along the shaft center of the movable tool rest to switch different tools.

[0011] The tool holder rotation driving mechanism is installed on the multi-axis motion platform of the tool holder, and is used for driving the tool on the tool holder to complete a moving action.

[0012] The locking tool disc driving mechanism is installed on the last stage of the multi-axis motion platform or the tool holder driving rotation mechanism, the locking tool disc is fixed on the driving end of the locking tool disc driving mechanism, and the locking tool disc driving mechanism is used for driving the locking tool disc to move along the axial direction of the movable tool holder to be close to or away from the movable tool holder.

[0013] The rear surface or the front surface of the movable tool holder is provided with a plurality of locking holes with equal angles, and a plurality of locking shafts are correspondingly arranged on the locking tool disc, and the angle between adjacent locking holes is matched with the angle between adjacent tools on the movable tool holder.

[0014] The assembly clearance between the locking hole and the locking shaft is smaller than the assembly clearance of the movable tool holder rotation shaft, and the locking shaft and the locking hole are inserted and matched.

[0015] Preferably, the mouth of the locking hole is in an expanded shape.

[0016] Preferably, the end of the locking shaft is a tapered head.

[0017] Preferably, the inner hole of the locking hole is a circular hole, and the main body of the locking shaft is a cylinder.

[0018] Preferably, the locking tool disc driving mechanism comprises an electric screw rod mechanism installed on the last stage of the multi-axis motion platform or the tool holder driving rotation mechanism, and the electric screw rod mechanism comprises at least two straight guide rods, and the locking tool disc is fixed on the sliding block of the electric screw rod mechanism.

[0019] Preferably, the electric screw rod mechanism comprises four straight guide rods arranged in the same plane or in layers.

[0020] Preferably, the locking tool disc is arranged behind the movable tool holder, and the locking hole is located at the rear of the movable tool holder.

[0021] Preferably, the locking tool disc is arranged in front of the movable tool holder, the locking tool disc is installed on the sliding block of the electric screw rod through an upper cantilever, and the locking hole is located in front of the movable tool holder.

[0022] Preferably, the number of the locking hole and the locking shaft is equal to the number of the tool.

[0023] Preferably, the assembly clearance between the straight guide rod and the sliding block in the electric screw rod mechanism is the same as the clearance between the locking shaft and the locking hole.

[0024] Compared with the prior art, the utility model has substantial features and progress, specifically, the utility model has the following advantages:

[0025] After the overall volume of the turning-milling combined machine tool is enlarged, the shaking caused by the assembly gap becomes unacceptable with the increase of the diameter of the tool holder, which greatly affects the machining precision, and the precision of the rotating part is difficult to control after the size is enlarged, in order to simplify the problem, the utility model provides a locking tool disc, the locking tool piece only has the horizontal displacement ability in the axial direction, and has no activity allowance in other directions, after the tool is adjusted in place, the locking tool disc is used to lock the circumferential direction of the movable tool holder, the assembly gap of the locking shaft and the locking hole is smaller than the rotating assembly gap of the movable tool holder, so that the overall vibration of the movable tool holder can be reduced, even if it cannot be completely eliminated, it can also be controlled within the required precision range.

[0026] Moreover, since the activity direction of the assembly gap at the rotating shaft of the movable tool holder is not completely consistent with the activity direction of the locking tool disc itself, the activity allowance of the movable tool holder can be further reduced after locking, and the stability of the movable tool holder is controlled.

[0027] Compared with the assembly precision of the movable tool holder, the cost and technical difficulty of the modification scheme are greatly reduced, and can be popularized and applied to almost all existing large-size combined machine tools, and has excellent popularization and application value. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structure principle diagram of a turning-milling combined machine tool tool holder in the embodiment 1 of the utility model.

[0029] Figure 2 is a structure principle diagram of a turning-milling combined machine tool tool holder in the embodiment 2 of the utility model.

[0030] Figure 3 is a structure schematic view of the locking tool disc in the utility model.

[0031] Figure 4 is a schematic view of the locking tool disc driving mechanism in the utility model.

[0032] In the drawing: 1. Movable tool holder; 2. Tool holder multi-axis movement platform; 3. Tool holder rotating driving mechanism; 4. Locking tool disc; 5. Locking tool disc driving mechanism; 11. Locking hole; 41. Locking shaft; 42. Upper cantilever. PREFERRED EMBODIMENT

[0033] The technical scheme of the utility model will be further described in detail through specific embodiments.

[0034] As shown in Figure 1 , Figure 3 and Figure 4 , a turning-milling combined machine tool tool holder, comprising a movable tool holder 1, a tool holder multi-axis movement platform 2, a tool holder rotating driving mechanism 3, a locking tool disc 4 and a locking tool disc driving mechanism 5.

[0035] The movable tool holder 1 is driven by the tool holder driving rotation mechanism 3 to rotate along the axis of the movable tool holder 1 to switch different tools, and the tool holder rotation driving mechanism 3 is installed on the tool holder multi-axis movement platform 2 to drive the tools on the movable tool holder 1 to complete movement actions.

[0036] The design is a conventional design, and different tool types are designed in the circumferential direction of the movable tool holder 1. According to the needs of the machining steps, different tools are switched for machining after the angle is set to rotate, which is one of the typical characteristics of a compound machine tool.

[0037] Due to the design form of the movable tool holder 1, there will be a certain amount of play when assembling due to machining, assembly, and other precision errors. When the machine tool size is small, this amount of play can be allowed, but when the machine tool size is large, the amount of play at the rotating shaft will be enlarged with the increase of the radius of the movable tool holder, which will significantly increase the amount of play of the end tool and directly affect the machining precision.

[0038] Although this problem can be solved by improving the size precision and assembly precision of the movable tool holder 1 itself, it is difficult and costly to optimize the size precision and assembly precision of such large parts, which will significantly increase the cost of equipment and is not conducive to cost control.

[0039] Therefore, the embodiment proposes:

[0040] The locking tool disc driving mechanism 5 is installed on the last stage of the multi-axis movement platform 2 or the tool holder driving rotation mechanism 3 as the basis for locking support.

[0041] In other embodiments, it can also be installed on other stages of the multi-axis movement platform 2. In theory, the more stable the structure of the basis for support is, the more stable the movable tool holder after locking is, but it also represents an increase in technical difficulty, which requires additional matching of other movement mechanisms that move synchronously with the multi-axis movement platform 2.

[0042] The locking tool disc 4 is fixed to the driving end of the locking tool disc driving mechanism 5, and the locking tool disc driving mechanism 5 is used to drive the locking tool disc 4 to move along the axis of the movable tool holder 1 to approach or move away from the movable tool holder 1.

[0043] A plurality of equiangular distribution locking holes 11 are arranged on the back or front of the movable tool holder 1, a plurality of locking shafts 41 are correspondingly arranged on the locking tool disc 4, the angle between adjacent locking holes 11 is adapted to the angle between adjacent tools on the movable tool holder 1, which is equal in this embodiment, the number of locking holes and locking shafts is also equal to the number of tools, and the locking tool disc 4 is arranged behind the movable tool holder 1, and the locking holes 11 are located behind the movable tool holder 1.

[0044] The matching gap between the locking hole 11 and the locking shaft 41 is smaller than the assembly activity allowance of the rotating shaft of the movable tool holder 1, and the locking shaft 41 is inserted into the locking hole 11, so as to reduce the rotating allowance of the movable tool holder 1.

[0045] Since the movable tool holder can be inclined in any direction under the influence of the activity allowance in the static state, the mouth of the locking hole is designed as a flared shape, and the end of the locking shaft is designed as a tapered head, so that the locking hole and the locking shaft can be quickly inserted together at the beginning of the locking matching, and the movable tool holder 1 is adaptively moved to the position and locked as the insertion action is deepened.

[0046] In order to facilitate processing and ensure accuracy, the inner hole of the locking hole 11 is a circular hole, and the main body of the locking shaft 41 is a cylinder.

[0047] Specifically, in the embodiment, the locking tool disc driving mechanism 5 includes a motorized lead screw mechanism installed on the last stage of the multi-axis motion platform or the tool holder driving rotating mechanism, and the motorized lead screw mechanism includes at least two straight guide rods, which are designed as four straight guide rods in the embodiment, and the four straight guide rods are arranged in the same plane or in layers. The locking tool disc 4 is fixed to the sliding block of the motorized lead screw mechanism.

[0048] Working principle:

[0049] When adjusting the tool, the locking tool disc 4 is driven by the locking tool disc driving mechanism 5 to move away from the movable tool holder 1, and the locking hole 11 and the locking shaft 41 are separated.

[0050] When the tool is adjusted to the position, the locking tool disc 4 is driven by the locking tool disc driving mechanism 5 to move close to the movable tool holder 1, the locking shaft 41 enters the locking hole 11, and the movable tool holder 1 is locked, so that the circumferential direction activity allowance of the movable tool holder 1 is greatly reduced.

[0051] As for the activity allowance of the movable tool holder in other directions, it is constrained by the original multi-axis motion platform.

[0052] After the locking is completed, the locking tool disc moves together with the multi-stage motion platform, and does not affect the work of the tool.

[0053] It can effectively prevent the movable tool holder 1 from shaking too much due to vibration during the process of machining the workpiece, and further ensure the machining precision.

[0054] Embodiment 2

[0055] As shown in Figure 2 The locking tool disc 4 is arranged in front of the movable tool holder 1, the locking tool disc 4 is installed on the sliding block of the motorized lead screw through the upper cantilever 42, and the locking hole 11 is located in front of the movable tool holder 1.

[0056] Preferably, the number of locking holes and locking shafts is equal to the number of tools.

[0057] Preferably, the assembly gap between the linear guide rod and the sliding block in the electric screw mechanism is the same as the gap between the locking shaft and the locking hole.

[0058] Embodiment 3

[0059] The locking shaft can also be designed as a cone with a small taper, which fills the hole of the locking hole by pressing into the locking hole, thereby locking it.

[0060] Finally, it should be noted that: the above has made a detailed description of the preferred embodiments of the patent, but the patent is not limited to the above embodiments, within the knowledge of those skilled in the art, various changes can also be made without departing from the purpose of the patent.

Claims

1. A turning-milling combined machine tool tool holder, comprising a movable tool holder, a tool holder multi-axis motion platform and a tool holder rotation driving mechanism, characterized in that: The locking tool disc and the locking tool disc driving mechanism are further included; The movable tool holder is driven to rotate along the axis of the movable tool holder by the tool holder driving rotation mechanism to switch different tools; The tool holder rotation driving mechanism is installed on the multi-axis motion platform of the tool holder to drive the tools on the movable tool holder to complete moving actions; The locking tool disc driving mechanism is installed on the last stage of the multi-axis motion platform or the tool holder driving rotation mechanism, the locking tool disc is fixed on the driving end of the locking tool disc driving mechanism, and the locking tool disc driving mechanism is used to drive the locking tool disc to move along the axis of the movable tool holder to be close to or away from the movable tool holder; The back or front of the movable tool holder is provided with a plurality of locking holes with equal angles, and a plurality of locking shafts are correspondingly provided on the locking tool disc, the angle between adjacent locking holes is adapted to the angle between adjacent tools on the movable tool holder. The fitting clearance between the locking hole and the locking shaft is smaller than the assembly play of the movable tool holder rotation shaft.

2. The turn-mill center of claim 1, wherein: The mouth of the locking hole is flared.

3. A turn-mill center according to claim 1 or 2, characterized in that: The end of the locking shaft is a tapered head.

4. A turn-mill center of claim 1 or 2, characterized in that: The inner hole of the locking hole is a circular hole, and the main body of the locking shaft is a cylinder.

5. A turn-mill-complex machine tool head according to claim 4, characterized in that: The locking tool disc driving mechanism includes an electric screw rod mechanism installed on the last stage of the multi-axis motion platform or the tool holder driving rotation mechanism, the electric screw rod mechanism includes at least two straight guide rods, and the locking tool disc is fixed on the sliding block of the electric screw rod mechanism.

6. A turn-mill-complex machine tool head according to claim 5, characterized in that: The electric screw rod mechanism includes four straight guide rods arranged in the same plane or in layers.

7. A turn-mill-complex machine tool head according to claim 6, characterized in that: The locking tool disc is arranged behind the movable tool holder, and the locking hole is located behind the movable tool holder.

8. A turn-mill-complex machine tool head according to claim 7, characterized in that: The locking tool disc is arranged in front of the movable tool holder, the locking tool disc is installed on the sliding block of the electric screw rod through an upper suspension arm, and the locking hole is located in front of the movable tool holder.

9. A turn-mill-complex machine tool head according to claim 8, characterized in that: The number of the locking hole and the locking shaft is equal to the number of the tools.

10. A turn-mill center according to claim 9, characterized in that: The assembly clearance between the straight guide rod and the sliding block in the electric screw rod mechanism is the same as the clearance between the locking shaft and the locking hole.

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