Economical cylinder type broaching precision cutter cylinder

Abstract

The invention discloses an economical cylinder type broaching precision cutter cylinder which comprises a cutter cylinder body, an end cover and a propeller. The cutter cylinder comprises a cutter strip-cooling unit, at least two positioning shafts, a guide strip and a cutter strip; the blade-cooling unit is at least composed of two blade mounting sleeves and a cooling sleeve which are coaxially arranged, and the two blade mounting sleeves and the cooling sleeve both penetrate through two positioning shafts to be fixedly mounted; a guide strip and a cutter strip are mounted on the inner wall of the cutter strip mounting sleeve; the end cover is installed at one end of the cutter cylinder, and the propeller is arranged at the other end of the cutter cylinder. The problem that one part of a traditional cutter cylinder is damaged and the whole cutter cylinder needs to be scrapped is solved, the structural modular design is adopted, all the parts can be detached and replaced, if the precision is reduced due to part abnormity, only the abnormal parts need to be directly replaced, and cost is saved; the cutter cylinder is easy to position and fix, the machining cost of the cooling sleeve is lower under the condition that the overall structural strength and precision are guaranteed, and a workpiece is efficiently and conveniently installed and positioned.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical equipment, and particularly relates to an economical barrel broaching precision tool holder. Background Art

[0002] In the existing barrel broaching precision tool holder, the tool bar mounting sleeve is fixedly connected to the outer tool holder as a whole and generally cannot be disassembled. If damaged, only the whole set can be scrapped, and the overall cost is very high. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides an economical barrel broaching precision tool holder, which is modularly designed, and all components on the tool holder can be replaced, saving costs and improving efficiency.

[0004] The present invention adopts the following technical solutions:

[0005] An economical barrel broaching precision tool holder includes a tool holder, an end cover and a thruster; the tool holder includes: a tool bar-cooling unit, at least two positioning shafts, a guide bar and a tool bar; the tool bar-cooling unit is at least composed of two tool bar mounting sleeves and a cooling sleeve coaxially arranged, and the above two components are fixedly installed through the two positioning shafts to ensure the installation accuracy; a plurality of guide bar grooves and a plurality of tool bar grooves are axially and uniformly formed on the inner wall of the tool bar mounting sleeve to respectively install the guide bar and the tool bar; the end cover is installed at one end of the tool holder, and the thruster is arranged at the other end to push the workpiece into the tool holder for processing.

[0006] Further, the thruster is provided with a boss and a stepped end face for workpiece positioning.

[0007] Further, screw holes are formed at both ends of the positioning shaft to install gasket screws for fixation to prevent the positioning shaft from moving and disengaging from one or several tool bar mounting sleeves and the cooling sleeve.

[0008] Further, the tool bar mounting sleeves and the cooling sleeve in the tool bar-cooling unit are alternately and tightly arranged, the end cover is connected to the tool bar mounting sleeve at the end of the tool bar-cooling unit, and the other end of the tool bar-cooling unit is also a tool bar mounting sleeve.

[0009] Further,

[0010] A plurality of through holes are radially formed on the outer circumferential surface of the tool bar mounting sleeve to fix the guide bar and the tool bar through screws, and the guide bar is used for positioning the workpiece.

[0011] Further, one end of the tool bar abuts against the end cover to prevent the tool bar from moving during broaching.

[0012] Further, pin holes are formed on the end face of the end cover and pins are installed to facilitate positioning and installation on the tool bar-cooling unit.

[0013] Furthermore, threaded holes are provided on the end face of the end cover, and set screws are installed. When disassembling the end cover, the end cover can be removed by screwing the set screw in the reverse direction.

[0014] Furthermore, a plurality of through grooves are evenly arranged radially on both end faces of the cooling sleeve, and an annular groove is arranged on the circumference and communicated with the through grooves; an outer shell is arranged outside the tool holder barrel, and after being filled with oil, it can jointly form an oil passage with the annular groove and the through grooves on the cooling sleeve, playing a role in flushing iron filings and cooling the tool bar.

[0015] Furthermore, a threaded through hole is axially opened on the cooling sleeve or the tool bar mounting sleeve located in the middle of the relative position in the tool bar-cooling unit, and long screws are screwed in from both ends of the tool bar-cooling unit and fixed on the threaded through hole to fix the tool bar mounting sleeve and the cooling sleeve.

[0016] The beneficial effects compared with the prior art are as follows:

[0017] 1. The structure of the present invention is modularly designed, and all components on the tool holder barrel can be disassembled and replaced. If the components on the tool holder barrel are abnormal and cause a decrease in accuracy, the abnormal components can be directly replaced, without scrapping the entire set of equipment, saving costs.

[0018] 2. For this set of devices, the positioning and fixing of the tool holder barrel are simple. Under the condition of ensuring the overall structural strength and accuracy, the processing of the cooling sleeve is simpler, reducing the overall processing cost.

[0019] 3. The workpiece is first pre-positioned with the boss on the pusher, and then positioned with the outer circle formed by the stepped end face and the guiding strip of the pusher, and the installation and positioning are efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of the internal structure of an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of the installation of the upper end cover of an embodiment of the present invention;

[0023] Figure 4 is a cross-sectional view of the installation of the guiding strip and the tool bar of an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the cooling sleeve of an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the internal oil passage of an embodiment of the present invention;

[0026] Among them, 1 - tool bar mounting sleeve, 1.1 - threaded through hole; 2 - cooling sleeve, 2.1 - through groove, 2.2 - annular groove, 3 - end cover, 3.1 - pin, 3.2 - setscrew, 4 - positioning shaft, 5 - guide bar, 6 - tool bar, 7 - thruster, 7.1 - boss, 8 - workpiece. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] On the contrary, the present invention covers any substitutions, modifications, equivalent methods and solutions made within the spirit and scope of the present invention as defined by the claims. Further, in order to enable the public to better understand the present invention, in the following detailed description of the present invention, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these details.

[0029] According to a specific example of the present invention, an economical barrel broaching precision tool holder of the present invention may include a tool holder, an end cover 3 and a thruster 7; the tool holder includes: a tool bar - cooling unit, two positioning shafts 4, a guide bar 5 and a tool bar 6; the tool bar - cooling unit is at least composed of two tool bar mounting sleeves 1 and a cooling sleeve 2 arranged coaxially, and the above two components are fixedly installed through the two positioning shafts 4 to ensure the installation accuracy; the inner wall of the tool bar mounting sleeve 1 is axially and evenly provided with a plurality of guide bar grooves and a plurality of tool bar grooves to respectively install the guide bar 5 and the tool bar 6; the end cover 3 is installed at one end of the tool holder, and the thruster 7 is arranged at the other end to push the workpiece 8 into the tool holder for processing.

[0030] The thruster 7 is provided with a boss 7.1 and a stepped end face for positioning the workpiece 8.

[0031] In the tool bar - cooling unit, the tool bar mounting sleeves 1 and the cooling sleeve 2 are alternately and tightly arranged, the end cover 3 is connected to the tool bar mounting sleeve 1 at the end of the tool bar - cooling unit, and the other end of the tool bar - cooling unit is also a tool bar mounting sleeve 1.

[0032] The two end faces of the cooling sleeve 2 are radially and evenly provided with a plurality of through grooves 2.1, and an annular groove 2.2 is provided on the circumference and is communicated with the through grooves 2.1; a housing is provided outside the tool holder, and after passing oil, it can jointly form an oil circuit with the through grooves 2.1 and the annular groove 2.2 on the cooling sleeve to play a role in flushing iron chips and cooling the tool bar 6.

[0033] Embodiment:

[0034] Figure 1 Figure 2The seven tool bar mounting sleeves 1 and the six cooling sleeves 2 shown pass through the two positioning shafts 4 in sequence alternately. Two long screws pass through the tool bar mounting sleeves 1 at both ends respectively and are fixed on the threaded through holes 1.1 in the axial direction of the tool bar mounting sleeve 1 located at the middle position of the tool bar-cooling unit, so that each tool bar mounting sleeve 1 and the cooling sleeve 2 are completely pressed against each other; screw holes are axially opened at both ends of the positioning shaft 4 to install gasket screws for fixation to prevent the positioning shaft from moving up and down and disengaging from the tool bar mounting sleeve and the cooling sleeve, resulting in loss of positioning. The workpiece 8 is pre-positioned by the boss 7.1 of the pusher 7 and is positioned by the outer circle composed of the stepped end face of the pusher 7 and the five guiding bars 5, which is convenient for installation and positioning;

[0035] Figure 3 The shown end cover 3 is fixed on the tool bar mounting sleeve 1 at one end of the tool bar-cooling unit and is positioned by the pin 3.1. When disassembling the end cover 3, just use the jackscrew 3.2 to push the end cover 3 in the reverse direction.

[0036] Figure 4 The shown guiding bars 5 and the tool bars 6 are respectively installed in the guiding bar grooves and the tool bar grooves on the inner wall of the tool bar mounting sleeve 1. Through holes are radially opened on the circumferential surface of the tool bar mounting sleeve 1 and screws are screwed on them to fix the guiding bars 5 and the tool bars 6;

[0037] Figure 5 、 6 Shown are the through slots 2.1 and the ring slots 2.2 on the cooling sleeve. Each cooling sleeve is provided with a total of sixteen through slots 2.1, and eight through slots 2.1 are evenly distributed on each end face. An outer shell is provided outside the tool cylinder. After passing oil, it can jointly form an oil circuit with the through slots 2.1 and the ring slots 2.2 on the cooling sleeve, playing a role in flushing iron chips and cooling the tool bars 6.

[0038] Working principle: The workpiece 8 is arranged on the pusher 7 and pushed into the tool cylinder to perform broaching of the workpiece 8.

[0039] As mentioned above, it is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent replacements or changes, all belong to the protection scope of the present invention.

Claims

1. An economical barrel-type broaching precision cutter barrel, characterized in that: It comprises a knife barrel, an end cover (3) and a propeller (7); The knife barrel comprises: a knife bar-cooling unit, at least two positioning shafts (4), a guide bar (5) and a knife bar (6); The blade-cooling unit is composed of at least two blade mounting sleeves (1) and a cooling sleeve (2) which are coaxially arranged, and the two components are fixedly installed by passing through two positioning shafts (4) to ensure installation accuracy; The inner wall of the blade installation sleeve (1) is evenly provided with a plurality of guide strip grooves and a plurality of blade strip grooves in the axial direction, so as to respectively install the guide strip (5) and the blade strip (6); The end cover (3) is installed at one end of the knife barrel, and the pusher (7) is arranged at the other end to push the workpiece (8) into the knife barrel for processing.

2. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: The pusher (7) is provided with a boss and a step end surface for positioning the workpiece (8).

3. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: A screw hole is respectively formed at both ends of the positioning shaft (4) for fixing with a gasket screw to prevent the positioning shaft from moving and causing the blade mounting sleeve (1) and the cooling sleeve (2) to fall out.

4. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: The blade installation sleeve (1) and the cooling sleeve (2) in the blade-cooling unit are alternately and tightly arranged, the end cover (3) is connected to the blade installation sleeve (1) at the end of the blade-cooling unit, and the other end of the blade-cooling unit is also a blade installation sleeve (1).

5. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: A plurality of through holes are radially opened on the outer circumferential surface of the blade installation sleeve (1) so as to fix the guide strip (5) and the blade strip (6) by means of screws.

6. The economical barrel-type precision broaching tool barrel according to claim 1, characterized in that: One end of the blade strip (6) abuts against the end cover (3) to prevent the blade strip (6) from moving during the broaching process.

7. The economical barrel-type precision broaching tool barrel according to claim 1, characterized in that: The end surface of the end cover (3) is provided with a pin hole and is installed with a pin (3.1) so as to facilitate positioning and installation on the blade-cooling unit.

8. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: The end surface of the end cover (3) is provided with a top screw. When removing the end cover (3), the top cover (3) can be removed by using the top screw (3.2) to push the top end cover (3) in the opposite direction.

9. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: A plurality of through grooves (2.1) are evenly arranged radially on both end surfaces of the cooling jacket (2), and an annular groove (2.2) is arranged on the circumference and communicates with the through groove (2.1); A shell is arranged outside the knife barrel, which can form an oil circuit together with the annular groove (2.2) and the through groove (2.1) on the cooling sleeve after oil is passed through, so as to play the role of flushing iron chips and cooling the knife strip (6).

10. The economical barrel-type broaching precision tool barrel according to claim 1, characterized in that: A threaded through hole (1.1) is axially opened on the cooling sleeve (2) or the blade installation sleeve (1) located in the middle of the blade-cooling unit, and long screws are screwed into the two ends of the blade-cooling unit and fixed on the threaded through hole (1.1) to fix the blade installation sleeve (1) and the cooling sleeve (2).

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