Four-station quick-change tool rest

Abstract

The utility model relates to the technical field of lathe tool rests, in particular to a four-station quick-change tool rest which comprises a tool rest body and a combined tool rest, a first straight hole and a second straight hole are formed in the middle of the tool rest body from top to bottom, the inner diameters of the first straight hole and the second straight hole are sequentially reduced, and two vertically-through positioning holes are evenly distributed in the position, corresponding to the outer side of the first straight hole, of the tool rest body along the circumference. A positioning notch with a U-shaped cross section and an inward opening is formed in the upper part of one positioning hole; outer clamping tables are arranged in the middle of the front side, the middle of the left side, the middle of the rear side and the middle of the right side of the tool rest body, a combined tool rest capable of installing a turning tool is clamped to each outer clamping table, and a locking mechanism capable of rapidly locking the position of each combined tool rest is arranged between each combined tool rest and the tool rest body. When the tool needs to be replaced due to abrasion, tool breakage or a technological process, the tool can be rapidly replaced, the working time of tool replacement is greatly saved, the working efficiency is effectively improved, and the influence on the machining cycle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe tool rests and is a four-station quick-change tool rest. Background Art

[0002] With the application of new technologies in the mechanism industry and the large-scale CNC manufacturing equipment, the status of manufacturing processing centers has gradually taken shape, and the use of CNC machine tools has played an important role in industrial cities across the country. However, ordinary lathes are more suitable for single-piece, small-batch production and repair workshops because of their high cost-effectiveness, wide range of processing objects, large adjustment range of spindle speed and feed rate, and the ability to process the inner and outer surfaces, end faces and inner and outer threads of workpieces. Therefore, many factories still use ordinary lathes.

[0003] The performance of the turret determines the quality of the products processed by ordinary lathes. The hand-cranked four-station tool holder used in it is widely used in turning processing. The turning tool is often adjusted by plugging gaskets to adjust the center height. The tool height has always been difficult to grasp. Clamping the tool will take a lot of time and have a great impact on the production cycle. In addition, the error of clamping the tool will also have a certain impact on the surface roughness and shape and position accuracy of the processed parts, which will in turn affect the overall processing accuracy and efficiency of the machine tool. Summary of the invention

[0004] The utility model provides a four-station quick-change tool holder, which overcomes the deficiencies of the prior art and can effectively solve the problem that tool installation and replacement of the prior four-station tool holder is time-consuming and labor-intensive, and has a great impact on the turning production cycle.

[0005] The technical solution of the utility model is achieved through the following measures: a four-station quick-change tool holder, comprising a tool holder body and a combined tool holder, a first straight hole and a second straight hole with inner diameters decreasing successively from top to bottom are provided in the middle of the tool holder body, two vertically penetrating positioning holes are evenly distributed along the circumference of the tool holder body corresponding to the outer position of the first straight hole, and a positioning notch with a U-shaped cross section and an inward opening is provided on the upper part of one of the positioning holes; external clamping tables are provided in the middle of the front side, the middle of the left side, the middle of the rear side and the middle of the right side of the tool holder body, a combined tool holder capable of mounting a turning tool is clamped on each external clamping table, and a locking mechanism capable of quickly locking the position of the combined tool holder is provided between each combined tool holder and the tool holder body.

[0006] The following are further optimizations and / or improvements to the above utility model technical solution:

[0007] The above-mentioned combined tool holder may include a turning tool fixing seat and a clamping bolt. The external clamping platform is a dovetail platform. The turning tool fixing seat corresponding to the position of the dovetail platform is provided with a dovetail groove matched with the dovetail platform, and the dovetail platform is clamped in the dovetail groove; the turning tool fixing seat on the side away from the tool holder body is provided with a turning tool installation groove opening outward in the middle part, and the turning tool fixing seat corresponding to the upper side position of the turning tool installation groove is provided with a number of clamping screw holes that pass through up and down at intervals, and each clamping screw hole is screwed with a clamping bolt that can quickly clamp the turning tool.

[0008] The above-mentioned locking mechanism may include a dovetail locking pin and an eccentric pin shaft. Each dovetail platform is provided with a pin hole in the middle part, the inner end of which can be connected with the lower end of the first straight hole. Each pin hole is provided with a dovetail locking pin at the outer end of which can be clamped in the corresponding dovetail groove. Each dovetail locking pin is provided with a third straight hole running through it from top to bottom in the middle part. A fourth straight hole running through it from top to bottom is provided on the tool holder body corresponding to each third straight hole position. Each fourth straight hole is provided with an eccentric pin shaft, the upper end of which is located above the tool holder body. The middle part of the eccentric pin shaft is sleeved in the third straight hole, and can control the locking and unlocking between the outer end of the dovetail locking pin and the dovetail groove.

[0009] The above-mentioned eccentric pin shaft may include a first shaft section, a second shaft section and a third shaft section from top to bottom, the first shaft section and the third shaft section are coaxially arranged and are both inserted into the fourth straight hole, and a wrench portion and a limiting outer ring platform are provided on the outer side of the upper end of the first shaft section from top to bottom, and the second shaft section is an eccentric pin shaft section and is inserted into the third straight hole.

[0010] Auxiliary clamping tables with rectangular cross-sections can be provided at the four corners of the tool holder body, and both ends of all turning tool fixing seats close to the tool holder body can be provided with V-grooves adapted to the shape of the corresponding auxiliary clamping tables, and the inner side of the V-groove is slidably installed with the outer side of the auxiliary clamping table.

[0011] A height adjustment portion capable of adjusting the height position of the combined tool holder in the up and down directions may be provided in the middle portion of the upper side of the combined tool holder. The height adjustment portion may include an adjustment seat and a lifting adjustment rod. The lower side of the adjustment seat is fixedly mounted on the upper side of the middle portion of the combined tool holder. A support platform with its lower end located above the outer clamping platform is provided on the adjustment seat close to the side of the tool holder body. A screw hole that passes through the support platform from top to bottom is provided in the middle portion. A lifting adjustment rod with its lower end capable of abutting against the upper side of the outer clamping platform is screwed into the screw hole.

[0012] An upper cover adapted to the first straight hole is detachably mounted on the middle portion of the upper side of the tool holder body.

[0013] The utility model has a reasonable and compact structure and is easy to use. It adopts a dovetail groove and a dovetail platform to quickly clamp the combined tool holder and the tool holder body together, and drives the dovetail locking pin to move inside and outside the pin hole through the eccentric shaft to realize the locking and unlocking of the dovetail groove by the dovetail locking pin. When the tool needs to be changed due to wear, tool breakage or process flow, it can be quickly interchanged, which greatly saves the tool changing working time, effectively improves work efficiency and reduces the impact on the processing cycle; it can realize external tool setting, save a lot of tool setting and debugging time, and can also accurately adjust the height of the combined tool holder through the lifting and lowering adjustment rod to avoid the influence of the error of clamping the tool on the position accuracy and surface roughness of the processed parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the front view cross-sectional structure of embodiments 1-7 of the present utility model.

[0015] Attached Figure 2 For attachment Figure 1 Schematic diagram of the three-dimensional structure.

[0016] Attached Figure 3 For attachment Figure 1 Schematic diagram of the three-dimensional structure in which the combined tool holder is connected to the height adjustment part.

[0017] Attached Figure 4 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the tool holder body.

[0018] Attached Figure 5 For attachment Figure 1 Schematic diagram of the three-dimensional structure of the dovetail lock pin.

[0019] The codes in the accompanying drawings are: 1 is the tool holder body, 2 is the first straight hole, 3 is the second straight hole, 4 is the positioning hole, 5 is the positioning notch, 6 is the turning tool fixing seat, 7 is the clamping bolt, 8 is the dovetail platform, 9 is the dovetail groove, 10 is the turning tool mounting groove, 11 is the dovetail locking pin, 12 is the pin hole, 13 is the third straight hole, 14 is the fourth straight hole, 15 is the first shaft section, 16 is the second shaft section, 17 is the third shaft section, 18 is the wrench part, 19 is the limiting outer ring platform, 20 is the auxiliary clamping platform, 21 is the V-shaped groove, 22 is the adjustment seat, 23 is the lifting adjustment rod, 24 is the support platform, 25 is the upper cover, 26 is the turning tool, and 27 is the threaded fastener. DETAILED DESCRIPTION

[0020] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0022] The present invention is further described below in conjunction with the embodiments and drawings:

[0023] Embodiment 1: As attached Figure 1-5 As shown, the four-station quick-change tool holder includes a tool holder body 1 and a combined tool holder. A first straight hole 2 and a second straight hole 3 with decreasing inner diameters are provided in the middle of the tool holder body 1 from top to bottom. Two vertically penetrating positioning holes 4 are evenly distributed along the circumference of the tool holder body 1 corresponding to the outer position of the first straight hole 2. A positioning notch 5 with a U-shaped cross-section and an inward opening is provided on the upper part of one of the positioning holes 4. External clamping tables are provided in the middle of the front side, the middle of the left side, the middle of the rear side and the middle of the right side of the tool holder body 1. A combined tool holder capable of mounting a turning tool 26 is clamped on each external clamping table. A locking mechanism capable of quickly locking the position of the combined tool holder is provided between each combined tool holder and the tool holder body 1.

[0024] During use, the device can be quickly clamped on the tool holder through the first straight hole 2 and the second straight hole 3, and then fixed on the tool holder through the positioning hole 4 and the positioning notch 5 in conjunction with the positioning pin. The above installation method is a well-known and common technology in the field of ordinary lathe tool holders in the prior art.

[0025] The device can be equipped with multiple combined tool holders according to actual needs, generally more than four. In the preparation stage of part processing, various types of turning tools 26 to be used in the part processing process can be taken out according to the process flow, and fixedly installed on the corresponding combined tool holders respectively. Then, according to the use order of each turning tool 26 in the process flow, the combined tool holders with the corresponding turning tools 26 fixedly installed are sequentially clamped on the external clamping table, and the relative position of the combined tool holder and the tool holder body 1 is locked by the corresponding locking mechanism. The four turning tools 26 installed on the tool holder body 1 can adjust the position of the combined tool holder by rotating the tool holder, and the method of rotating the four turning tools 26 is a known technology.

[0026] When the turning tool 26 needs to be replaced according to the process flow, the position of the turning tool that is no longer in use is confirmed, the corresponding locking mechanism is opened, the combined tool holder is removed from the corresponding external clamping table, the combined tool holder with the required turning tool 26 installed is clamped on the vacant external clamping table, and the combined tool holder is locked again by the locking mechanism, and the replacement of the turning tool 26 can be completed quickly. Compared with the detachable turning tool 26 replacement method in the prior art, the combined tool holder in the present device has a unified fixing method for the turning tool 26, which saves time and effort when changing tools, can realize tool alignment outside the machine, can effectively improve the turning processing efficiency, greatly save working time and shorten the processing production cycle. In addition, even if the original turning tool 26 needs to be installed on the tool holder body 1 again, it can still be quickly replaced without adjusting its relative position with the tool holder body 1.

[0027] According to the requirements, the two positioning holes 4 in this embodiment are both located on one of the diagonals of the tool holder body 1, so that the direction of the present device is the same as the installation direction of the general four-station tool holder in the prior art. The outer dimensions of the positioning holes 4 and the positioning notches 5 match the outer dimensions of the positioning pins used therein, and the outer dimensions of the first straight hole 2 and the second straight hole 3 are adapted to the outer dimensions of the external mounting portion of the tool holder in the prior art; the shape of the external clamping platform can be achieved by the T-shaped clamping platform in the prior art, and a T-slot adapted to the T-shaped clamping platform is correspondingly provided on the combined tool holder; the locking mechanism can be achieved by a latch-type clamp or a luggage buckle or a spring lock pin mechanism in the prior art.

[0028] The above four-station quick-change tool holder can be further optimized and / or improved according to actual needs:

[0029] Embodiment 2: As attached Figure 1-3 As shown, the combined tool holder includes a turning tool fixing seat 6 and a clamping bolt 7, the external clamping platform is a dovetail platform 8, and the turning tool fixing seat 6 corresponding to the position of the dovetail platform 8 is provided with a dovetail groove 9 adapted to the dovetail platform 8, and the dovetail platform 8 is clamped in the dovetail groove 9; the turning tool fixing seat 6 on the side away from the tool holder body 1 is provided with a turning tool installation groove 10 opening outward in the middle part, and the turning tool fixing seat 6 corresponding to the upper side position of the turning tool installation groove 10 is provided with a plurality of clamping screw holes that pass through the upper and lower parts at intervals, and each clamping screw hole is screwed with a clamping bolt 7 that can quickly clamp the turning tool 26.

[0030] The tool 26 is then moved to the position where it will be moved and the tool 26 can be moved to the position where it will be moved. According to the requirements, the clamping bolt 7 can be realized by a hexagonal head bolt with a washer, a square head bolt with a washer, a tool platform bolt or a tool holder fixing bolt in the prior art.

[0031] Embodiment 3: As attached Figure 1 , 2As shown in , 5, the locking mechanism includes a dovetail locking pin 11 and an eccentric pin shaft. A pin hole 12 is provided in the middle of each dovetail platform 8, the inner end of which can be connected to the lower end of the first straight hole 2. A dovetail locking pin 11 is provided in each pin hole 12, the outer end of which can be clamped in the corresponding dovetail groove 9. A third straight hole 13 is provided in the middle of each dovetail locking pin 11, which passes through from top to bottom. A fourth straight hole 14 is provided in the tool holder body 1 corresponding to the position of each third straight hole 13, and an eccentric pin shaft is provided in each fourth straight hole 14, the upper end of which is located above the tool holder body 1. The middle part of the eccentric pin shaft is sleeved in the third straight hole 13, and can control the locking and unlocking between the outer end of the dovetail locking pin 11 and the dovetail groove 9.

[0032] According to the requirements, the shape of the outer end of the dovetail locking pin 11 is the same as the outer shape of the dovetail platform 8, both are dovetail platforms 8, and are compatible with the dovetail groove 9. When the dovetail locking pin 11 is in the unlocked state, its outer end is flush with the corresponding outer side surface of the dovetail platform 8; the eccentric pin shaft can be either an optical axis or an eccentric screw, and the inner diameter of the third straight hole 13 is compatible with the outer dimensions of the eccentric pin shaft; the pin hole 12 is compatible with the shape of the dovetail locking pin 11, and in this example, the longitudinal cross-section shape of the pin hole 12 is a rectangle.

[0033] During use, when the turning tool fixing seat 6 is clamped on the outer side of the dovetail platform 8, it will also be clamped on the outer end of the dovetail locking pin 11. In this way, when the eccentric shaft is rotated, the eccentric shaft can drive the dovetail locking pin 11 to move inward and outward along the length direction of the pin hole 12; when the dovetail locking pin 11 moves inward (that is, moves in the direction of the first straight hole 2), the dovetail platform 8 at the outer end of the dovetail locking pin 11 can pull the turning tool fixing seat 6 toward the tool holder body 1, locking the relative position between the turning tool fixing seat 6 and the tool holder body 1; when the dovetail locking pin 11 moves outward, The dovetail platform 8 at the outer end of the dovetail locking pin 11 gradually relaxes its pull on the turning tool fixing seat 6, and finally puts the turning tool fixing seat 6 in a relaxed state, releasing the locking state between the turning tool fixing seat 6 and the tool holder body 1. At this time, the turning tool fixing seat 6 can be quickly pulled out from the tool holder body 1 for replacement. Therefore, when the tool is worn, broken, or the tool needs to be changed due to the process, the above steps can be followed to quickly change the tool, which greatly saves working time and improves work efficiency. For ordinary lathe processing, tool setting can be achieved outside the machine, saving a lot of tool setting and debugging time.

[0034] Embodiment 4: As attached Figure 1 As shown, the eccentric pin shaft includes a first shaft section 15, a second shaft section 16 and a third shaft section 17 from top to bottom. The first shaft section 15 and the third shaft section 17 are coaxially arranged and are both inserted into the fourth straight hole 14. The outer side of the upper end of the first shaft section 15 is provided with a wrench portion 18 and a limiting outer ring platform 19 from top to bottom. The second shaft section 16 is an eccentric pin shaft section and is inserted into the third straight hole 13.

[0035] By arranging in this way, when the center position of the tool deviates from the center of the part to be processed, fine adjustment can be performed by rotating the eccentric shaft. According to the requirements, the spanner portion 18 can be realized by a spanner slot or spanner platform with a drum-shaped, square or hexagonal cross section.

[0036] Embodiment 5: As attached Figure 2-4 As shown, auxiliary clamping tables 20 with rectangular cross-sections are provided at the four corners of the tool holder body 1, and both ends of all turning tool fixing seats 6 close to the tool holder body 1 are provided with V-grooves 21 that are adapted to the shape of the corresponding auxiliary clamping tables 20, and the inner side of the V-groove 21 is slidably installed with the outer side of the auxiliary clamping table 20.

[0037] By such arrangement, the V-shaped groove 21 and the auxiliary clamping table 20 can further limit the relative position between the turning tool fixing seat 6 and the tool holder body 1, and improve the installation accuracy between the turning tool fixing seat 6 and the tool holder body 1, so as to eliminate the influence of tool change on the zero position accuracy and surface roughness of the machining to be performed. In this embodiment, the two V-shaped grooves 21 on the same turning tool fixing seat 6 are symmetrical about the middle section of the turning tool fixing seat 6.

[0038] Embodiment 6: As attached Figure 1-3 As shown, each combined tool holder is provided with a height adjustment portion in the middle of the upper side which can adjust the height position of the combined tool holder in the up and down directions. The height adjustment portion includes an adjustment seat 22 and a lifting adjustment rod 23. The lower side of the adjustment seat 22 is fixedly installed with the upper side of the middle part of the combined tool holder. The adjustment seat 22 close to the side of the tool holder body 1 is provided with a support platform 24 whose lower end is located above the outer clamping platform. A screw hole that passes through the support platform 24 from top to bottom is provided in the middle part. A lifting adjustment rod 23 whose lower end can abut against the upper side of the outer clamping platform is screwed into the screw hole.

[0039] During use, the height position of the combined tool holder can be accurately adjusted by rotating the lifting and lowering adjustment rod 23. According to the requirements, a scale line can be set on the lifting and lowering adjustment rod 23 to make the adjustment more accurate. The lifting and lowering adjustment rod 23 can be realized by bolts, machine screws or set screws in the prior art; the fixed installation between the adjustment seat 22 and the combined tool holder can be realized by non-detachable installation methods such as welding in the prior art, or by detachable installation methods such as threaded fasteners 27.

[0040] Embodiment 7: As attached Figure 1-2 As shown, an upper cover 25 adapted to the first straight hole 2 is detachably mounted on the middle portion of the upper side of the tool holder body 1 .

[0041] This arrangement can effectively prevent dust, iron filings during turning, etc. from falling into the first straight hole 2 and affecting the normal operation of the dovetail lock pin 11. In this embodiment, the upper cover 25 can be fixedly mounted to the tool holder body 1 by means of a threaded fastener 27.

[0042] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A four-station quick-change tool holder, characterized in that It includes a tool holder body and a combined tool holder, a first straight hole and a second straight hole with inner diameters decreasing successively are arranged in the middle of the tool holder body from top to bottom, two vertically penetrating positioning holes are evenly distributed along the circumference of the tool holder body corresponding to the outer position of the first straight hole, and a positioning notch with a U-shaped cross-section and an inward opening is arranged on the upper part of one of the positioning holes; external clamping tables are arranged in the middle of the front side, the middle of the left side, the middle of the rear side and the middle of the right side of the tool holder body, a combined tool holder capable of mounting a turning tool is clamped on each external clamping table, and a locking mechanism capable of quickly locking the position of the combined tool holder is arranged between each combined tool holder and the tool holder body.

2. The four-station quick-change tool holder according to claim 1 is characterized in that The combined tool holder includes a turning tool fixing seat and a clamping bolt. The external clamping platform is a dovetail platform. The turning tool fixing seat corresponding to the position of the dovetail platform is provided with a dovetail groove matched with the dovetail platform, and the dovetail platform is clamped in the dovetail groove; the turning tool fixing seat on the side away from the tool holder body is provided with a turning tool installation groove opening outward in the middle part, and the turning tool fixing seat corresponding to the upper side position of the turning tool installation groove is provided with a number of clamping screw holes that pass through up and down at intervals, and each clamping screw hole is screwed with a clamping bolt that can quickly clamp the turning tool.

3. The four-station quick-change tool holder according to claim 2 is characterized in that The locking mechanism includes a dovetail locking pin and an eccentric pin shaft. Each dovetail platform is provided with a pin hole in the middle part, the inner end of which can be connected with the lower end of the first straight hole. Each pin hole is provided with a dovetail locking pin at the outer end of which can be clamped in the corresponding dovetail groove. Each dovetail locking pin is provided with a third straight hole that passes through from top to bottom in the middle part. A fourth straight hole that passes through from top to bottom is provided on the tool holder body corresponding to each third straight hole position. Each fourth straight hole is provided with an eccentric pin shaft, the upper end of which is located above the tool holder body. The middle part of the eccentric pin shaft is sleeved in the third straight hole, and can control the locking and unlocking between the outer end of the dovetail locking pin and the dovetail groove.

4. The four-station quick-change tool holder according to claim 3 is characterized in that The eccentric pin shaft includes a first shaft section, a second shaft section and a third shaft section from top to bottom. The first shaft section and the third shaft section are coaxially arranged and are both inserted into the fourth straight hole. A wrench portion and a limiting outer ring table are provided on the outer side of the upper end of the first shaft section from top to bottom. The second shaft section is an eccentric pin shaft section and is inserted into the third straight hole.

5. The four-station quick-change tool holder according to claim 2, 3 or 4, characterized in that Auxiliary clamping tables with rectangular cross-sections are provided at the four corners of the tool holder body. Both ends of all turning tool fixing seats close to the tool holder body are provided with V-grooves that match the shape of the corresponding auxiliary clamping tables. The inner side of the V-groove is slidably installed with the outer side of the auxiliary clamping table.

6. The four-station quick-change tool holder according to claim 1, 2, 3 or 4, characterized in that A height adjustment part capable of adjusting the height position of the combined tool holder in the up and down directions is provided in the middle part of the upper side of each combined tool holder, the height adjustment part includes an adjustment seat and a lifting adjustment rod, the lower side of the adjustment seat is fixedly mounted on the upper side of the middle part of the combined tool holder, a support platform with the lower end located above the outer clamping platform is provided on the adjustment seat close to the side of the tool holder body, a screw hole that passes through the support platform from top to bottom is provided in the middle part, and a lifting adjustment rod with the lower end that can abut against the upper side of the outer clamping platform is screwed into the screw hole.

7. The four-station quick-change tool holder according to claim 5, characterized in that A height adjustment part capable of adjusting the height position of the combined tool holder in the up and down directions is provided in the middle part of the upper side of each combined tool holder, the height adjustment part includes an adjustment seat and a lifting adjustment rod, the lower side of the adjustment seat is fixedly mounted on the upper side of the middle part of the combined tool holder, a support platform with the lower end located above the outer clamping platform is provided on the adjustment seat close to the side of the tool holder body, a screw hole that passes through the support platform from top to bottom is provided in the middle part, and a lifting adjustment rod with the lower end that can abut against the upper side of the outer clamping platform is screwed into the screw hole.

8. The four-station quick-change tool holder according to claim 1 or 2 or 3 or 4 or 7, characterized in that An upper cover adapted to the first straight hole is detachably mounted on the middle portion of the upper side of the tool holder body.

9. The four-station quick-change tool holder according to claim 5, characterized in that An upper cover adapted to the first straight hole is detachably mounted on the middle portion of the upper side of the tool holder body.

10. The four-station quick-change tool holder according to claim 6, characterized in that An upper cover adapted to the first straight hole is detachably mounted on the middle portion of the upper side of the tool holder body.

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