Clamping device for parts with inclined holes

Abstract

The utility model discloses a clamping device for oblique hole parts, which includes: a first clamping piece, which includes a clamping part and a fixing part formed in one piece, the clamping part is used to be clamped in a three-jaw chuck, the fixing part is arranged at one end of the clamping part, and the end is provided with a clamping opening, the clamping opening is used to clamp one end of the part to be processed; a second clamping piece, which includes a plane end and an opening end corresponding to the plane end, the plane end is used to fit the end of another part to be processed, the opening end is provided with a groove, and the groove is used to be supported and fixed by the top of the lathe. The knurling integrity of the formed parts is ensured, and the processing efficiency and forming quality are improved by adjusting the knurling process.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a clamping device for oblique hole parts. Background Art

[0002] The outer circle knurling of conventional parts is directly processed according to the outer dimensions. However, the outer circle process of some special models of products requires knurling, and the knurling processing is directly processed according to the outer circle dimensions. When making holes, because there are two φ1 inclined holes on the end face, the machining center processes the φ1 hole, and its outlet is in the pattern of the outer circle of the part, and the φ1 drill bit breaks frequently. Removing the broken drill bit will affect the appearance of the part, seriously affecting the overall processing efficiency and the processing quality of the part.

[0003] To this end, the existing technology adjusts the process to first process the shape, external thread and inclined hole of the part and then perform knurling. However, this method requires a jacket to clamp the external thread for external knurling. The axial force generated by the longitudinal feed during knurling is relatively large, and the force of the jacket clamping the part cannot be too large, otherwise the external thread of the part will be damaged. And the length of the clamped part is only 7 mm. Therefore, when the clamping force is less than the axial resistance generated during external knurling, the workpiece will rotate, causing the rolled pattern to have cross-grain patterns, affecting the processing efficiency and processing quality.

[0004] There is currently no effective solution to the problems of low processing efficiency and low processing quality when processing inclined hole parts in the prior art. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a clamping device for inclined hole parts, which clamps the inclined hole parts on a lathe through the cooperation of a first clamping piece and a second clamping piece to ensure that the workpiece does not rotate during knurling, thereby solving the problems of low processing efficiency and low processing quality in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a clamping device for oblique hole parts, comprising: a first clamping piece, the first clamping piece comprises an integrally formed clamping part and a fixing part, the clamping part is used to be clamped in a three-jaw chuck, the fixing part is arranged at one end of the clamping part, and the end is provided with a clamping opening, the clamping opening is used to clamp one end of the part to be processed; a second clamping piece, the second clamping piece comprises a plane end and an open end corresponding to the plane end, the plane end is used to fit the end of another part to be processed, the open end is provided with a groove, the groove is used to be supported and fixed by the top of the lathe. Further optionally, the clamping opening is provided with an internal thread, and the internal thread is adapted to the external thread of the part to be processed.

[0007] Further optionally, the outer diameter of the second clamping member is smaller than the outer diameter of the part to be processed.

[0008] Further optionally, the outer diameter of the second clamp is 1 mm smaller than the outer diameter of the part to be processed.

[0009] Further optionally, the length of the clamping portion is 2-3 times the length of the fixing portion.

[0010] Further optionally, a gasket is provided at the planar end.

[0011] On the other hand, the utility model also provides a knurling method for inclined hole parts, which uses the above-mentioned clamping device for inclined hole parts to perform post-clamping knurling, including: pre-processing the initial part to obtain the part to be processed; loading the clamping part of the first clamping piece into the three-jaw chuck of the lathe, and clamping the first clamping piece with a three-jaw chuck wrench; fixing the threaded end of the part to be processed in the clamping opening of the fixing part; fitting the planar end of the second clamping piece to the end of the part to be processed, and using the lathe center to push into the groove of the open end to support the second clamping piece; using a lathe to perform external cylindrical knurling on the part to be processed until the knurling is completed, and removing the processed part.

[0012] Further optionally, the process of performing external cylindrical knurling on the part to be processed by a lathe until the knurling process is completed includes: removing burrs in the inclined hole of the part to be processed by a bench work process.

[0013] Further optionally, the removing of the processed parts includes: after shutting down the lathe, loosening the lathe top and removing the second clamping piece; and unscrewing the processed parts from the first clamping piece.

[0014] The above technical solution has the following beneficial effects: the first clamping member cooperates with the second clamping member to clamp the workpiece on the lathe, ensuring that the workpiece will not rotate when the lathe is running, thereby ensuring the knurling integrity of the formed part; by adjusting the knurling process, the processing efficiency and forming quality are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of an oblique hole part in the prior art;

[0017] Figure 2 It is a structural schematic diagram of a first clamping member provided in an embodiment of the utility model;

[0018] Figure 3 It is a structural schematic diagram of a second clamping member provided in an embodiment of the utility model;

[0019] Figure 4 It is a flow chart of a knurling method for an inclined hole part provided in an embodiment of the utility model.

[0020] Figure numerals: 100 - knurling; 200 - oblique hole; 300 - thread; 1 - clamping part; 2 - fixing part; 3 - clamping opening; 4 - groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Figure 1 It is a structural schematic diagram of the oblique hole parts in the prior art, such as Figure 1 As shown, after forming, the outer circle of the large end of the part needs to be knurled ( Figure 1 The middle 100 position) m0.5, the large end needs to be made into a 2-φ1 inclined hole 200, and the small end is processed with M10×1 thread 300 on the outside. The appearance requirements of the parts are extremely strict.

[0023] The outer circle knurling of conventional parts is directly processed according to the outer dimensions, but the outer circle process of the above-mentioned parts requires knurling, and the knurling processing is directly processed according to the outer circle dimensions. Since there are two φ1 inclined holes on the end face, if the two φ1 inclined holes are processed according to the conventional process, that is, the drill bit drills from the large end downward, and the outlet of the drilled inclined hole is in the pattern of the outer circle of the part, the φ1 drill bit often breaks. Removing the broken drill bit will seriously affect the overall appearance of the part, and greatly reduce the overall processing efficiency and processing quality when mass-producing parts.

[0024] In order to solve the problems of low processing efficiency and low processing quality in the prior art of processing oblique hole parts, the embodiment of the utility model provides a clamping device for oblique hole parts, such as Figure 2 , Figure 3As shown, the clamping device includes: a first clamping member, the first clamping member includes an integrally formed clamping portion 1 and a fixing portion 2, the clamping portion 1 is used to be clamped in a three-jaw chuck, the fixing portion 2 is arranged at one end of the clamping portion 1, and the end is provided with a clamping opening 3, the clamping opening 3 is used to clamp one end of the part to be processed; a second clamping member, the second clamping member includes a plane end and an open end corresponding to the plane end, the plane end is used to fit the end of another part to be processed, the open end is provided with a groove 4, and the groove 4 is used to be supported and fixed by the top of the lathe.

[0025] like Figure 2 As shown, the clamping device for the oblique hole part includes a first clamping member. The first clamping member is generally cylindrical, and includes an integrally formed clamping portion 1 and a fixing portion 2. The clamping portion 1 is cylindrical, and a fixing portion 2 extends from one end. The diameter of the fixing portion 2 is smaller than the diameter of the clamping portion 1. Specifically, the diameter of the clamping portion 1 is φ23, and the diameter of the fixing portion 2 is φ19. A clamping opening 3 is provided at the free end of the fixing portion 2, and the clamping opening 3 is adapted to the small end (threaded end) of the part to be processed, and the small end can be clamped in the clamping opening 3.

[0026] like Figure 3 As shown, the clamping device for the inclined hole part also includes a second clamping piece, which is cylindrical, has a flat surface at one end and a groove 4 at the other end. The flat surface end is used to fit the large end face of the part to be processed. During processing, the lathe tip can enter the groove 4 to fix the second clamping piece.

[0027] As an optional implementation, the clamping opening 3 is provided with an internal thread, which is adapted to the external thread of the part to be processed.

[0028] The inner wall of the clamping opening 3 is provided with an internal thread, which is matched with the external thread on the outer side of the small end of the part to be processed. The thread size of the part is M10×1 thread, and the inner thread size of the inner wall of the clamping opening 3 is M10×1 thread.

[0029] As an optional implementation, the outer diameter of the second clamping member is smaller than the outer diameter of the part to be processed.

[0030] The outer diameter of the second fixture is smaller than the outer diameter of the part to be processed.

[0031] As an optional implementation, the outer diameter of the second clamp is 1 mm smaller than the outer diameter of the part to be processed.

[0032] As an optional implementation, the length of the clamping portion 1 is 2-3 times the length of the fixing portion 2 .

[0033] As an optional implementation, a gasket is provided at the flat end.

[0034] A gasket is also provided at the flat end of the second clamping member to prevent the end of the part from being worn.

[0035] The knurling method in the prior art is specifically as follows:

[0036] 1. The outer diameter, knurling and external thread dimensions of parts processed in general turning process;

[0037] 2. The machining center process processes the 2-φ1 inclined hole.

[0038] In order to avoid the problems of low processing efficiency and damage to the part appearance caused by drill bit bending, the processing technology was adjusted as follows:

[0039] 1. The lathe process completes the shape of the parts, the external thread and other dimensions, and the φ1 inclined hole;

[0040] 2. External knurling is performed in the general turning process.

[0041] During the external knurling process in the general turning process, the M10×1 thread is clamped with a sleeve to perform external knurling. The axial force generated by the longitudinal feed during knurling is relatively large, and the force of the sleeve clamping the part cannot be too large, otherwise the M10×1 thread will be damaged by the excessive force. And the length of the clamped part is only 7 mm. Therefore, when the clamping force is less than the axial resistance generated during external knurling, the workpiece will rotate, causing the rolled pattern to have cross-grain patterns and other phenomena. To solve this problem, the embodiment of the utility model also provides a knurling method for an oblique hole part, which uses the above-mentioned clamping device for the oblique hole part to perform post-clamping knurling, including:

[0042] S1. Pre-processing the initial parts to obtain the parts to be processed;

[0043] The lathe process processes the shape of the part, processes the external thread on its small end, and completes two φ1 inclined holes to obtain the part to be processed.

[0044] S2, installing the clamping part of the first clamping piece into the three-jaw chuck of the lathe, and clamping the first clamping piece with a three-jaw chuck wrench;

[0045] Then, the general turning process is carried out, at this time, the clamping part of the first clamping piece is installed in the three-jaw chuck of the ordinary lathe, and the first clamping piece is clamped with a three-jaw chuck wrench.

[0046] S3, fixing the threaded end of the part to be processed in the clamping opening of the fixing part;

[0047] The small end (threaded end) of the part to be processed is clamped into the clamping opening of the first clamping member. Specifically, the small end of the part to be processed can be screwed into the clamping opening through threaded engagement.

[0048] S4, fit the flat end of the second clamping piece to the end of the workpiece to be processed, and use the lathe top to push it into the groove of the open end to support the second clamping piece;

[0049] The flat end of the second clamp is fitted to the end (large end face) of the part to be processed, and then the lathe center is used to support the groove at the open end, thereby fixing the part to be processed on the lathe.

[0050] S5. Use a lathe to perform external cylindrical knurling on the parts to be processed until the knurling process is completed, and then remove the processed parts.

[0051] Start the lathe to complete the knurling process on the outer circle of the part to obtain the finished part.

[0052] As an optional implementation, a lathe is used to perform external knurling on the part to be processed, and after the knurling is completed, the process includes: removing burrs in the inclined hole of the part to be processed by a benching process.

[0053] After the knurling process is completed, in order to ensure the smoothness of the inclined holes, the burrs in the two inclined holes of the part need to be removed through a bench process.

[0054] As an optional implementation, removing the processed parts includes: after shutting down the lathe, loosening the lathe center, and removing the second fixture; and unscrewing the processed parts from the first fixture.

[0055] After the knurling of the part is completed, turn off the lathe, loosen the lathe center, first remove the second clamping piece, and then rotate the part out of the first clamping piece in the opposite direction to obtain the completed part.

[0056] In batch processing, the efficiency of parts processing and forming can be improved.

[0057] The above technical solution has the following beneficial effects: the first clamping member cooperates with the second clamping member to clamp the workpiece on the lathe, ensuring that the workpiece will not rotate when the lathe is running, thereby ensuring the knurling integrity of the formed part; by adjusting the knurling process, the processing efficiency and forming quality are improved.

[0058] The specific implementation methods of the utility model above further explain in detail the purpose, technical solutions and beneficial effects of the utility model. It should be understood that the above content is only the specific implementation methods of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A clamping device for oblique hole parts, characterized in that: include: A first clamping piece, the first clamping piece includes an integrally formed clamping portion and a fixing portion, the clamping portion is used to be clamped in a three-jaw chuck, the fixing portion is provided at one end of the clamping portion, and a clamping opening is provided at the end thereof, the clamping opening is used to clamp one end of a part to be processed; The second clamping part includes a plane end and an open end corresponding to the plane end, the plane end is used to fit the end of another part to be processed, and the open end is provided with a groove, and the groove is used to be supported and fixed by the top of the lathe.

2. The clamping device for oblique hole parts according to claim 1 is characterized in that: The clamping opening is provided with an internal thread, which is matched with the external thread of the part to be processed.

3. The clamping device for oblique hole parts according to claim 1 is characterized in that: The outer diameter of the second clamping member is smaller than the outer diameter of the part to be processed.

4. The clamping device for oblique hole parts according to claim 3 is characterized in that: The outer diameter of the second clamp is 1 mm smaller than the outer diameter of the part to be processed.

5. The clamping device for oblique hole parts according to claim 1, characterized in that: The length of the clamping portion is 2-3 times the length of the fixing portion.

6. The clamping device for oblique hole parts according to claim 1, characterized in that: The flat end is provided with a gasket.

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