Inside-to-outside side face punching mechanism for barrel workpiece
By designing a side punching mechanism for punching inward and outward, the principle of oblique force is used to change the punching direction, the problem of burrs in the workpiece in the prior art is solved, the surface quality is improved and production costs are reduced.
Patent Information
- Application Number
- CN202421696293.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In the prior art, when processing terminal workpieces of round tubes and round barrels, the punching method from the outside to the inside causes burrs to occur in the inner wall of the workpiece, affecting the surface quality and increasing the cost of later grinding.
A side punching mechanism for the barrel workpiece is designed from the inside out. Through the coordination of the clamp inlet, the side cutting punching and the de-material inlet, the principle of oblique component force is used to change the punching direction, thereby changing the burr position.
Effectively solve the problem of inner wall burrs, by changing the position of the burrs instead of simply eliminating the burrs, the surface quality of the workpiece is improved and production costs are reduced.
Smart Images
Figure CN222551873U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of stamping production of electrical terminals, in particular to a side punching mechanism for a barrel workpiece from inside to outside. Background Art
[0002] There is a need to process a terminal workpiece of a round tube or barrel, and the side of the workpiece needs to be punched. The common processing method is to punch the workpiece from the outside to the inside, which is convenient for the layout of external equipment and the size of the external equipment is not limited. However, this will bring some quality problems, because the punching movement is radially inward, and the final product is like Figure 1 As shown, the burrs produced by punching will accumulate on the inner wall of the workpiece, namely, the inner burrs 6, which greatly deteriorates the surface quality of the inner wall of the workpiece. If the workpiece is socketed with other parts, the inner burrs 6 will scratch other parts.
[0003] The solution to the burrs on the inner wall is generally post-grinding, but post-grinding simply adds a process and increases production costs. Utility Model Content
[0004] The problem to be solved by the utility model is to provide a side punching mechanism for a cylindrical workpiece from the inside to the outside. Instead of simply considering how to eliminate burrs, the utility model changes the punching direction and then changes the burr position, thereby cleverly solving the problems of the prior art. The utility model uses the principle of oblique force distribution as a whole to provide a compact punching mechanism.
[0005] In order to solve the above problems, the utility model provides a side punching mechanism for a barrel workpiece from the inside to the outside. In order to achieve the above purpose, the technical solution adopted by the utility model to solve its technical problems is:
[0006] A mechanism for punching holes from the inside to the outside of a cylindrical workpiece on the side, comprising: a clamping insert having a conical head; a side cutting punch in sliding contact with the conical head of the clamping insert, the side cutting punch having a cutter head extending radially outward; a stripping insert having a receiving pit for accommodating the conical head and the side cutting punch, the stripping insert also having a limiting through hole for the cutter head to pass through; the clamping insert having the reciprocating translational freedom along its own axis, and the side cutting punch having the reciprocating translational freedom along the radial direction.
[0007] The beneficial effect of adopting the above technical solution is: in view of the current situation that conventional punching equipment will punch burrs on the inner wall of the tubular workpiece, this technical solution designs a mechanism for punching from the inside to the outside, so that the burrs are converted from internal burrs to external burrs. It does not simply consider how to eliminate the burrs, but cleverly solves the existing technical problems by changing the position of the burrs.
[0008] The main technical means is to convert the axial force into the radial force of the driving cutter head through the oblique direction of the cone head. The oblique conical surface of the cone head can play a force component effect of changing the direction of force application.
[0009] The whole mechanism is also suitable for narrow spaces. The cutter head directly contacts and punches the workpiece. The stripping insert contacts and limits the workpiece, and the clamp insert can be regarded as a power part.
[0010] As a further improvement of the utility model, a lower die knife holder is coaxially arranged next to the stripper insert, and the stripper insert and the lower die knife holder are in contact with the workpiece together. The stripper insert has an insertion section that contacts the inner wall of the workpiece, and the lower die knife holder has a limiting cavity that contacts the outer wall of the workpiece.
[0011] The beneficial effect of adopting the above technical solution is that the lower die cutter seat can assist in achieving a better punching effect.
[0012] As a further improvement of the present invention, the stripping insert has the freedom of axial reciprocating translation relative to the lower die cutter seat, and the movement distance of the clamping insert in a single cycle is greater than the movement distance of the stripping insert in a single cycle.
[0013] The beneficial effect of adopting the above technical solution is that the linear motion of the stripping insert is to allow the workpiece to be repeatedly fed and unloaded, leaving a path space for it. The linear motion of the clamping insert also requires the application of a punching force, so the action range is larger.
[0014] As a further improvement of the present invention, a plurality of cutter heads are arranged in mirror symmetry, or a plurality of cutter heads are arranged in a ring array around the axis of the conical head.
[0015] The beneficial effect of adopting the above technical solution is that the number of cutter heads is designed according to the number of punching holes required, and the cutter heads move synchronously as a whole.
[0016] As a further improvement of the present invention, the side cutting punch has a concave surface that is in surface contact with the conical head.
[0017] The beneficial effect of adopting the above technical solution is that the concave surface ensures the contact area of the fish cone head, ensures that the pressure here is relatively small, and facilitates the transmission of the component force.
[0018] As a further improvement of the utility model, the axis of the clamping plate is arranged vertically, and the center of mass of the side cutting punch is on the same horizontal plane as the cutter head.
[0019] The beneficial effect of adopting the above technical solution is: ensuring the stability of the cutter head when applying force.
[0020] As a further improvement of the present invention, the vertex angle of the conical head is not greater than 30°.
[0021] The beneficial effect of adopting the above technical solution is that when the vertex angle is small, the radial punching force of the cutter head can be larger.
[0022] As a further improvement of the present invention, the bottom surface of the accommodating pit is also provided with an avoidance pit for avoiding the conical head.
[0023] The beneficial effects of adopting the above technical solution are: the avoidance pit is to avoid damaging the end of the conical head, and the avoidance pit is also to ensure that the conical head has a sufficient axial movement range.
[0024] As a further improvement of the utility model, a channel is opened on the side wall of the limiting cavity of the lower die tool holder. When the limiting through hole is coaxial with the channel, the cutter head passes through the limiting through hole and the channel. One end of the channel is also connected to a blanking channel. When the cutter head punches the workpiece, waste wafers will be generated, and the blanking channel is used for blanking the waste wafers.
[0025] The beneficial effects of adopting the above technical solution are: waste material is avoided during punching, and the blanking channel provides a special blanking channel for the waste material, which is convenient for continuous punching on site.
[0026] As a further improvement of the utility model, the workpiece includes a tubular portion, the axial end of the tubular portion is vertically connected to a circular ring portion extending radially outward, the cutter head punches the tubular portion and punches out a through hole, and the circular ring portion contacts the top surface of the lower die tool holder.
[0027] The beneficial effect of adopting the above technical solution is that the workpiece can be placed on the lower die cutter seat each time, ensuring that a hole is punched out at the same axial length position of the workpiece each time. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] 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.
[0029] Figure 1 It is a schematic diagram of the effect of the prior art on the workpiece after processing;
[0030] Figure 2 It is a structural schematic diagram of an implementation mode of the utility model;
[0031] Figure 3 It is a structural schematic diagram of an implementation mode of the utility model;
[0032] Figure 4 It is a schematic diagram of the effect of processing a workpiece according to one embodiment of the utility model.
[0033] 1-lower die cutter seat; 11-channel; 12-blank channel; 13-limiting cavity; 2-workpiece; 21-circular ring portion; 22-tubular portion; 23-through hole; 24-waste disc; 3-side cutting punch; 31-conical cavity; 32-cutter head; 4-stripping insert; 41-avoidance pit; 42-insertion section; 43-accommodation pit; 44-limiting through hole; 5-ply plate insert; 51-conical head; 6-internal burr; 7-external burr. DETAILED DESCRIPTION
[0034] The following is a further detailed description of the present invention in conjunction with specific embodiments:
[0035] In order to achieve the purpose of the utility model, a side punching mechanism for a cylindrical workpiece from the inside to the outside comprises: a clamping insert 5, which itself has a conical head 51; a side cutting punch 3, which is in sliding contact with the conical head 51 of the clamping insert 5, and the side cutting punch 3 has a cutter head 32 extending radially outward; a stripping insert 4, which has a receiving pit 43 for accommodating the conical head 51 and the side cutting punch 3, and the stripping insert 4 also has a limiting through hole 44 for the cutter head 32 to pass through; the clamping insert 5 has the reciprocating translational freedom along its own axis, and the side cutting punch 3 has the reciprocating translational freedom along the radial direction.
[0036] The beneficial effect of adopting the above technical solution is: in view of the current situation that conventional punching equipment will punch out burrs on the inner wall of tubular workpieces, this technical solution designs a mechanism for punching from the inside to the outside, so that the burrs are converted from internal burrs to external burrs. It does not simply consider how to eliminate the burrs, but cleverly solves the existing technical problems by changing the position of the burrs. The main technical means is to convert the axial force into the radial force of the driving cutter head through the oblique direction of the conical head. The oblique conical surface of the conical head can play a force component effect that changes the direction of force application. The entire mechanism is also suitable for narrow spaces. The cutter head directly contacts the workpiece in and out during punching. The stripping insert is contacted and limited with the workpiece, and the splint insert can be regarded as a power part.
[0037] In other embodiments of the utility model, a lower die tool holder 1 is coaxially provided next to the stripper insert 4, and the stripper insert 4 and the lower die tool holder 1 are in contact with the workpiece 2 together. The stripper insert 4 has an insertion section 42 that contacts the inner wall of the workpiece 2, and the lower die tool holder 1 has a limiting cavity 13 that contacts the outer wall of the workpiece 2.
[0038] The beneficial effect of adopting the above technical solution is that the lower die cutter seat can assist in achieving a better punching effect.
[0039] In other embodiments of the present invention, the stripper insert 4 has the axial reciprocating translational freedom to move closer to or away from the lower die tool holder 1, and the movement distance of the clamping insert 5 in a single cycle is greater than the movement distance of the stripper insert 4 in a single cycle.
[0040] The beneficial effect of adopting the above technical solution is that the linear motion of the stripping insert is to allow the workpiece to be repeatedly fed and unloaded, leaving a path space for it. The linear motion of the clamping insert also requires the application of a punching force, so the action range is larger.
[0041] In other embodiments of the present invention, a plurality of cutter heads 32 are arranged in mirror symmetry, or a plurality of cutter heads 32 are arranged in a ring array around the axis of the conical head 51 .
[0042] The beneficial effect of adopting the above technical solution is that the number of cutter heads is designed according to the number of punching holes required, and the cutter heads move synchronously as a whole.
[0043] In other embodiments of the present invention, the side cutting punch 3 has a concave surface that is in surface contact with the conical head 51. Figure 3 As shown, the concave surfaces of all the side cutting punches 3 together form a tapered cavity 31 .
[0044] The beneficial effect of adopting the above technical solution is that the concave surface ensures the contact area of the fish cone head, ensures that the pressure here is relatively small, and facilitates the transmission of the component force.
[0045] In other embodiments of the present invention, the axis of the clamping punch 5 is arranged vertically, and the center of mass of the side cutting punch 3 and the cutter head 32 are on the same horizontal plane.
[0046] The beneficial effect of adopting the above technical solution is: ensuring the stability of the cutter head when applying force.
[0047] In other embodiments of the present invention, the vertex angle of the conical head 51 is not greater than 30°.
[0048] The beneficial effect of adopting the above technical solution is that when the vertex angle is small, the radial punching force of the cutter head can be larger.
[0049] In other embodiments of the present invention, the bottom surface of the accommodating pit 43 further comprises an avoidance pit 41 for avoiding the conical head 51 .
[0050] The beneficial effects of adopting the above technical solution are: the avoidance pit is to avoid damaging the end of the conical head, and the avoidance pit is also to ensure that the conical head has a sufficient axial movement range.
[0051] In other embodiments of the utility model, a channel 11 is opened on the side wall of the limiting cavity 13 of the lower die tool holder 1. When the limiting through hole 44 is coaxial with the channel 11, the cutter head 32 passes through the limiting through hole 44 and the channel 11. One end of the channel 11 is also connected to a blanking channel 12. When the cutter head 32 punches the workpiece 2, waste wafers 24 will be generated, and the blanking channel 12 is used for blanking the waste wafers 24.
[0052] The beneficial effects of adopting the above technical solution are: waste material is avoided during punching, and the blanking channel provides a special blanking channel for the waste material, which is convenient for continuous punching on site.
[0053] In other embodiments of the utility model, the workpiece 2 includes a tubular portion 22, the axial end of the tubular portion 22 is vertically connected to a circular ring portion 21 extending radially outward, the cutter head 32 punches the tubular portion 22 and punches out a through hole 23, and the circular ring portion 21 contacts the top surface of the lower die tool holder 1.
[0054] The beneficial effect of adopting the above technical solution is that the workpiece can be placed on the lower die cutter seat each time, ensuring that a hole is punched out at the same axial length position of the workpiece each time.
[0055] In actual operation, the clamping insert 5 and the stripping insert 4 move downward together, and the vertical movement stroke of the clamping insert 5 is greater than that of the stripping insert 4. When the side cutting punch 3 and the lower die cutter seat 1 press the workpiece 2, the clamping insert 5 continues to move downward, and through the conical head 51 of the clamping insert 5, the side cutting punch 3 starts to move horizontally to both sides, that is, radially outward, and then completes the action of punching and cutting the workpiece 2.
[0056] The final product is Figure 4 As shown, the burr finally produced is an external burr 7 located on the outer wall of the workpiece 2. Figure 1 and Figure 4 By comparison, the position of the burr is completely opposite.
[0057] In order to clearly show the structural principle, Figure 2 The lower die cutter 1, the workpiece 2, and the stripping insert 4 are in a state of being separated from each other. Figure 3 The lower die cutter 1, the workpiece 2, and the stripping insert 4 are in contact with each other. Figure 3 Also shown in FIG. 1 are several blanked wafer wastes 24 , which pass through the hole 11 and fall from the blanking channel 12 . Figures 1 to 4 It is also a cross-sectional view.
[0058] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A side punching mechanism for a cylindrical workpiece from the inside to the outside, characterized in that: include: The splint insert has a conical head; A side cutting punch is in sliding contact with the conical head of the clamping plate insert, and the side cutting punch has a cutting head extending radially outward; The stripping insert has a receiving pit for receiving the conical head and the side cutting punch, and the stripping insert also has a limiting through hole for the cutter head to pass through; The clamping punch has the freedom of reciprocating translation along its own axis, and the side cutting punch has the freedom of reciprocating translation along the radial direction.
2. The side punching mechanism for a cylindrical workpiece from inside to outside according to claim 1 is characterized in that: A lower die knife holder is coaxially arranged next to the stripper insert, and the stripper insert and the lower die knife holder are in contact with a workpiece together. The stripper insert has an insertion section that contacts the inner wall of the workpiece, and the lower die knife holder has a limiting cavity that contacts the outer wall of the workpiece.
3. The side punching mechanism for a cylindrical workpiece from inside to outside according to claim 2, characterized in that: The stripping insert has the freedom of axial reciprocating translation to approach or move away from the lower die cutter seat, and the movement distance of the clamping insert in a single cycle is greater than the movement distance of the stripping insert in a single cycle.
4. The side punching mechanism for a cylindrical workpiece from inside to outside according to claim 1, characterized in that: The plurality of cutter heads are arranged in a mirror-symmetrical manner, or the plurality of cutter heads are arranged in a ring array around the axis of the conical head.
5. The side punching mechanism for a cylindrical workpiece from inside to outside according to claim 1, characterized in that: The side cutting punch has a concave surface that is in surface contact with the conical head.
6. The mechanism for punching a cylindrical workpiece from inside to outside according to claim 1, characterized in that: The axis of the clamping plate insert is arranged vertically, and the center of mass of the side cutting punch is on the same horizontal plane as the cutter head.
7. The side punching mechanism for a cylindrical workpiece from inside to outside according to claim 1, characterized in that: The vertex angle of the conical head is not greater than 30°.
8. The mechanism for punching a cylindrical workpiece from inside to outside according to claim 1, characterized in that: The bottom surface of the accommodating pit is also provided with an avoidance pit for avoiding the conical head.
9. The mechanism for punching a cylindrical workpiece from inside to outside according to claim 2, characterized in that: A channel is opened on the side wall of the limiting cavity of the lower die tool holder. When the limiting through hole is coaxial with the channel, the tool head passes through the limiting through hole and the channel. One end of the channel is also connected to a blanking channel. When the tool head punches the workpiece, waste wafers will be generated, and the blanking channel is used for blanking the waste wafers.
10. The mechanism for punching a cylindrical workpiece from inside to outside according to claim 2, characterized in that: The workpiece comprises a tubular portion, the axial end of the tubular portion is integrally and vertically connected with a circular ring portion extending radially outward, the cutter head punches the tubular portion and punches out a through hole, and the circular ring portion contacts the top surface of the lower die seat.