Material gripper for cold heading machines

Abstract

The present application relates to the technical field of tooling fixture, and particularly discloses a material clamping jaw for a cold header. The material clamping jaw for the cold header can clamp materials or workpieces with various diameters through the eccentric adjusting rod to adjust the rotation of the first clamping piece, so as to change the gap between the first clamping piece and the second clamping piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tooling fixtures, in particular to a material clamping jaw for a cold header. BACKGROUND

[0002] The cold header is a kind of stamping machine in mechanical manufacturing, which is used to form the raw material into the required shape without any change. During production, the cold header clamps the material (copper wire or iron wire, etc.) to the die position through the clamping jaw, and then performs stamping on the material to make the material into a specified shape. When producing different products, the thickness of the material such as copper wire or iron wire is different. In order to enable the clamping jaw to clamp different sizes of materials or workpieces, the application file with the patent number CN202122448393.0 discloses a kind of elastic element suitable for clamping different sizes of materials, which expands the adaptive range of the equipment. However, when clamping larger materials through the elastic element, the elastic element shrinks greatly and can clamp the workpiece more firmly. When clamping smaller materials, the elastic element shrinks less or even does not shrink, and at this time the material cannot be clamped stably.

[0003] Therefore, the prior art still needs to be improved and developed. SUMMARY

[0004] The present application discloses a kind of material clamping jaws for cold header, to improve the problem of small application range of clamping jaw for cold header.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The material clamping jaw for cold header comprises:

[0007] The clamping arm seat is formed with an installation cavity through the upper and lower parts;

[0008] The pull rod passes through the installation cavity from top to bottom, and is used for up and down movement in the installation cavity;

[0009] The first connecting plate and the second connecting plate, one end of the first connecting plate is rotatably connected with the lower end of the pull rod, and one end of the second connecting plate is rotatably connected with the lower end of the pull rod;

[0010] The connecting rod is inserted into the clamping arm seat;

[0011] The adjusting rod is inserted into the clamping arm seat;

[0012] The first clamping piece and the second clamping piece, one end of the first clamping piece is rotationally connected with the adjusting rod, the middle of the first clamping piece is rotationally connected with the other end of the first connecting plate, one end of the second clamping piece is rotationally connected with the connecting rod, the middle of the second clamping piece is rotationally connected with the other end of the second connecting plate, the bottom of the first clamping piece and the second clamping piece is spaced apart by a gap for clamping the workpiece, the pull rod is used for driving the telescopic first clamping piece and the telescopic second clamping piece to clamp the workpiece by up-down movement, the adjusting rod is an eccentric rod, and the adjusting rod is used for driving the first clamping piece to rotate and adjusting the size of the gap.

[0013] Preferably, the adjusting rod comprises a first part, a second part and a third part, the first part and the third part are coaxially arranged and are both rotationally connected with the clamping arm seat, the second part is arranged coaxially with the first part, the second part is rotationally connected with one end of the first clamping piece, and the first part is provided with an adjusting groove.

[0014] Preferably, the rod diameters of the first part, the second part and the third part decrease in turn.

[0015] Preferably, the clamping jaw further comprises a fastener mounted on the clamping arm seat, and the fastener is used for relatively fixing the adjusting rod and the clamping arm seat.

[0016] Preferably, the clamping jaw further comprises a first spring arranged in the mounting cavity, one end of the first spring is in abutment with the top of the mounting cavity, and the other end of the first spring is in abutment with the lower part of the pull rod.

[0017] Preferably, the first clamping piece comprises a first clamping arm and a first clamp, the first clamping arm is used for rotationally connecting with the second part and the first connecting plate, the first clamp is used for clamping the workpiece, and the first clamp is mounted on the lower part of the first clamping arm.

[0018] Preferably, the first clamping arm is provided with a first recess, and the first clamp is arranged in the first recess.

[0019] Preferably, the second clamping piece comprises a second clamping arm and a second clamp, the second clamping arm is used for rotationally connecting with the connecting rod and the second connecting plate, and the second clamp is mounted on the lower part of the second clamping arm.

[0020] Preferably, the second clamp is provided with an opening.

[0021] Preferably, the second clamping arm is provided with a second recess, and the second clamp is arranged in the second recess.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] This invention provides a material gripper for a cold heading machine. One end of a first clamping member is rotatably connected to an adjusting rod (an eccentric rod), and the middle of the first clamping member is rotatably connected to a first connecting plate. One end of a second clamping member is rotatably connected to the connecting rod, and the middle of the second clamping member is rotatably connected to the second connecting plate. Rotating the adjusting rod causes the first clamping member to rotate, thereby increasing or decreasing the relative distance between the first and second clamping members. This allows the material gripper for the cold heading machine to be adjustable, making it suitable for clamping workpieces of different sizes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a material gripper for a cold heading machine according to an embodiment of the present invention;

[0025] Figure 2 This is an exploded view of a material gripper for a cold heading machine according to an embodiment of the present invention;

[0026] Figure 3 This is an exploded view of a material gripper for a cold heading machine according to an embodiment of the present invention;

[0027] Figure 4 This is an exploded view of a material gripper for a cold heading machine according to an embodiment of the present invention;

[0028] Figure 5 A cross-sectional structural diagram of the connection between the pull rod and the clamping arm seat provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure of the first clamping member and the second clamping member according to an embodiment of the present invention;

[0030] Figure 7 for Figure 6 The main view;

[0031] Figure 8 This is a schematic diagram of the adjustment principle of the adjustment rod according to an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure of an adjusting rod provided in an embodiment of the present invention;

[0033] Figure 10 This is a front view of an adjusting rod provided in an embodiment of the present invention.

[0034] Explanation of main component symbols: 10-clamping arm seat, 11-mounting cavity, 12-pressure cover, 20-pull rod, 21-second spring, 22-nut, 30a-first connecting plate, 30b-second connecting plate, 40-connecting rod, 50-adjusting rod, 51-first part, 52-second part, 53-third part, 60-first clamping member, 61-first clamping arm, 611-first groove, 62-first clamp, 70-second clamping member, 71-second clamping arm, 711-second groove, 72-second clamp, 721-opening, 80-fastener, 90-first spring, C-clamping rocker arm, D-gap. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0038] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0039] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0040] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0041] Example

[0042] Cold heading machines are commonly used stamping machines in machinery manufacturing, used to shape raw materials into the required shape without altering them. During production, the cold heading machine clamps the material (such as copper wire or iron wire) into the mold position using grippers, and then stamps the material to shape it into the specified form.

[0043] For example, the cold heading machine disclosed in patent application CN202122448393.0 uses elastic elements on the grippers to clamp the workpiece. However, it should be noted that when the cold heading machine needs to process workpieces with large differences in the diameter of the raw materials, i.e., when the diameter of some raw materials is much larger than that of others, the elastic elements on the grippers should have a margin for expansion and contraction to accommodate the difference in diameter, so that the grippers can clamp the workpiece normally. When the difference in diameter is large, the elastic element has a longer length under that difference, which increases the thickness of the grippers, and may cause interference between the grippers and the clamping arm seat. In other words, the grippers disclosed in patent application CN202122448393.0 are only suitable for some application scenarios where the diameter variation is not large.

[0044] Therefore, this application provides a material gripper for a cold heading machine. The first clamping member 60 is rotated by an eccentric adjusting rod 50, thereby changing the gap between the first clamping member 60 and the second clamping member 70, so that the material gripper can clamp materials or workpieces with different rod diameters.

[0045] Specifically, please refer to Figures 1-5The material gripper for a cold heading machine provided by the present invention includes a gripper arm seat 10, which forms a mounting cavity 11 through its upper and lower sections. A pull rod 20 passes through the mounting cavity 11 from top to bottom and can move up and down within the mounting cavity 11. The bottom of the pull rod 20 is located below the mounting cavity 11. A first connecting plate 30a and a second connecting plate 30b are provided at the bottom of the pull rod 20. One end of the first connecting plate 30a is rotatably connected to the bottom of the pull rod 20, and one end of the second connecting plate 30b is rotatably connected to the bottom of the pull rod 20. A first clamping member 60 and a second clamping member 70 are provided below the first connecting plate 30a and the second connecting plate 30b. The other end of the first connecting plate 30a is rotatably connected to the middle of the first clamping member 60, and the other end of the second connecting plate 30b is rotatably connected to the middle of the second clamping member 70. A connecting rod 40 and an adjusting rod 50 are inserted into the bottom of the clamping arm seat 10. One end of the first clamping member 60 is rotatably connected to the adjusting rod 50, and one end of the second clamping member 70 is rotatably connected to the connecting rod 40. The first clamping member 60 and the second clamping member 70 are arranged opposite to each other, with a gap between their bottoms. When the pull rod 20 moves up and down, it drives the first connecting plate 30a and the second connecting plate 30b to move, thereby causing the bottoms of the first clamping member 60 and the second clamping member 70 to move closer or further apart, thus achieving the clamping action. The adjusting rod 50 is an eccentric rod.

[0046] When the adjusting rod 50 rotates, the first clamping rod connected to the adjusting rod 50 will also rotate. At this time, the gap between the first clamping rod and the second clamping rod will increase or decrease. Thus, by adjusting the eccentric rod, the purpose of the gripper being able to clamp different workpieces is achieved.

[0047] See Figure 2 , Figure 3 and Figure 4 The connecting rod 40 is a round rod, and it is rotatably connected to the clamping arm seat 10 and the second clamping jaw. One end of the connecting rod 40 is provided with a protrusion to prevent the connecting rod 40 from slipping off.

[0048] 5. Adjusting rod 50 is an eccentric rod. The two ends connecting the eccentric rod and the clamp arm seat 10 should be coaxial.

[0049] This allows the eccentric rod to rotate normally. (Combined) Figure 9 and Figure 10 The eccentric rod includes a first part 51, a second part 52 and a third part 53. The first part 51 and the third part 53 are concentric round rods, and the second part 52 is a round rod but is not concentric with the first part 51 and the third part 53.

[0050] When the eccentric rod rotates, the second part 52 moves up and down relative to the rotation axis 0 of the first part 51 and the third part 53. At this time, one end of the first clamping member 60, which is rotatably connected to the second part 52, also moves up.

[0051] During the downward movement, since the middle of the first clamping member 60 is rotatably connected to the first connecting plate 30a, the position of the lower end (bottom end) of the first clamping member 60 also changes, that is, the size of the gap between the first clamping member 60 and the second clamping member 70 changes, and the material gripper can clamp objects with different rod diameters.

[0052] Furthermore, in conjunction with the appendix Figures 6-8 To understand, such as Figure 6 As shown, one end of the first clamping member 605 is inserted into the clamping arm seat 10 via an adjusting rod 50, thereby allowing the first clamping member 60 to rotate relative to the clamping arm seat 10. One end of the second clamping member 70 is inserted into the clamping arm seat 10 via a connecting rod 40, thereby allowing the second clamping member 70 to rotate relative to the clamping arm seat 10. Both the first clamping member 60 and the second clamping member 70 are "L"-shaped clamping members with an obtuse angle. The middle part of the first clamping member 60 is rotatably connected to the other end of the first connecting plate 30a, and the middle part of the second clamping member 70 is connected to the other end of the second connecting plate 30b.

[0053] The other end is rotatably connected. The pin 5 connecting the first connecting plate 30a and the first clamping member 60 is not shown in the figure, and similarly, the pin connecting the second connecting plate 30b and the second clamping member 70 is not shown.

[0054] Reference Figure 7 and combined Figure 4 When the pull rod 20 is connected to the first connecting plate 30a and the second connecting plate 30b, when the pull rod 20 moves upward, the middle of the first clamping member 60 and the second clamping member 70 both move upward, and at this time the bottom of the first clamping member 60 and the second clamping member 70 opens.

[0055] When the pull rod 20 moves downward, the middle parts of the first clamping member 60 and the second clamping member 70 both move downward. At this time, the bottoms of the first clamping member 60 and the second clamping member 70 close (moving closer to each other).

[0056] The distance between the first clamping member 60 and the second clamping member 70 is the gap.

[0057] Reference Figure 7 The first part 51 has a protrusion at the end furthest from the second part 52. The protrusion abuts against the clamping arm seat 10, thereby allowing the adjusting rod 50 to be fixed relative to the clamping arm seat 10. First part 51

[0058] An adjustment groove is provided on the protrusion. The adjustment groove is used to connect the adjustment tool. The adjustment tool can drive the adjustment rod 50 to rotate, thereby changing the gap between the first clamping member 60 and the second clamping member 70.

[0059] The adjustment slot can be hex, Phillips, flathead, or other shapes. Of course, each type of slot has a corresponding adjustment tool, such as an hex wrench for an hex slot, a Phillips screwdriver for a Phillips slot, or a flathead screwdriver for a flathead screwdriver.

[0060] Combination Figure 8 When adjustment is required, insert the adjustment tool into the adjustment slot and rotate the adjustment tool to drive the adjustment rod 50 to rotate. At this time, the first clamping member 60 moves from the position indicated by the dotted line.

[0061] After the line position is changed, the size of the gap increases from A to B.

[0062] The illustration only shows the adjustment method. When production is required according to the actual working conditions, the user can determine the size of the gap according to the size of the item to be clamped, and then adjust the gap to a suitable size using the adjustment tool.

[0063] Furthermore, combining Figure 1 The clamp arm seat 10 is also provided with a fastener 80 at the first part 51 of the adjusting rod 50. The fastener 80 is used to stabilize the relative position of the clamp arm seat 10 and the adjusting rod 50.

[0064] The fastener 80 is preferably a bolt, which is threadedly connected to the clamp arm seat 10. The head of the bolt abuts against the protrusion of the adjusting rod 50, so that the adjusting rod 50 cannot rotate relative to the clamp arm seat 10 after adjustment.

[0065] Preferably, in one embodiment of the present invention, the diameters of the first part 51, the second part 52 and the third part 53 are typically set to decrease in that order, thereby making it easier to process the adjusting rod 50.

[0066] Typically, compressed gas is introduced into the mounting cavity 11. When it is necessary to clamp the workpiece, the compressed gas drives the pull rod 20 to move downward, thereby causing the bottoms of the first clamping member 60 and the second clamping member 70 to close (come closer to each other).

[0067] Preferably, in one embodiment of the present invention, a first spring 90 is provided inside the mounting cavity 11, and the first spring 90 is disposed on the outer wall of the pull rod 20. One end of the first spring 90 abuts against the top of the mounting cavity 11, and the other end of the first spring 90 abuts against the bottom of the pull rod 20. When the pull rod 20 is driven to move upward, the first spring 90 is in a compressed state. When the pulling force driving the pull rod 20 disappears, the first spring 90 drives the pull rod 20 downward by its own elasticity, thereby causing the first clamping member 60 and the second clamping member 70 to move closer to each other to clamp the item. By replacing the compressed gas with the first spring 90, it is no longer necessary to check for air leakage at the mounting cavity 11, simplifying the use process and making the return of the pull rod 20 more stable.

[0068] To facilitate the installation of the first spring 90, the clamp arm seat 10 also includes a pressure cap 12. The pressure cap 12 is used to seal the upper opening 721 of the mounting cavity 11. The pressure cap 12 is provided with a through hole, which is adapted to the rod diameter of the pull rod 20, so that the first spring 90 is sealed in the mounting cavity 11 by the pressure cap 12, while the pull rod 20 can move up and down smoothly.

[0069] It is important to note that Figure 8 The diagram illustrates the rotation of the first clamping member 60 around the first connecting plate 30a and the connecting hole of the first clamping member 60. This is only a schematic drawing to make it easier to draw the rotation of the first clamping member 60.

[0070] Of course, the connection between the first connecting block and the first clamping member 60 can also move up and down. In actual rotation, as the gap between the first clamping member 60 and the second clamping member 70 changes, the height of the first clamping member 60 and the second clamping member 70 relative to the ground also changes.

[0071] Reference Figure 2 and Figure 3 The first clamping member 60 includes a first clamping arm 61 and a first clamp 62. The middle part of the first clamping arm 61 is rotatably connected to the other end of the first connecting plate 30a. The first clamp 62 is installed on the lower part of the first clamping arm 61 and is used to clamp the workpiece. When the first clamp 62 clamps the workpiece, it deforms. At this time, it can be easily replaced by disassembling the first clamp 62 without disassembling the connecting part between the first clamping arm 61 and the first connecting plate 30a.

[0072] The second clamping member 70 includes a second clamping arm 71 and a second clamp 72. The middle part of the second clamping arm 71 is rotatably connected to the other end of the second connecting plate 30b. The second clamp 72 is installed on the lower part of the second clamping arm 71 and is used to clamp the workpiece. When the second clamp 72 clamps the workpiece, it deforms. At this time, it can be easily replaced by disassembling the second clamp 72 without disassembling the connecting part between the second clamping arm 71 and the second connecting plate 30b.

[0073] Since the first clamping arm 61 and the second clamping arm 71 are to perform the clamping work, the lower parts of the first clamping arm 61 and the second clamping arm 71 are offset and not aligned.

[0074] Furthermore, in one embodiment of the present invention, a first groove 611 is provided at the lower part of the first clamping arm 61, and a second groove 711 is provided at the lower part of the second clamping arm 71, in combination with... Figure 2 , Figure 3 and Figure 4 The first groove 611 and the second groove 711 are arranged opposite to each other, and the first clamp 62 is installed in the first groove 611 and the second clamp 72 is installed in the second groove 711. When the depths of the first groove 611 and the second groove 711 are appropriate, the clamping surface of the first clamp 62 is directly opposite the clamping surface of the second clamp 72, which allows for better clamping of the workpiece.

[0075] A waist hole can also be provided on the first clamping arm 61, which passes through one side of the first groove 611. The first clamp 62 is provided with a mounting hole, and the first clamp 62 is fixed to the first clamping arm 61 by bolts passing through the mounting hole and the waist hole. When it is necessary to adjust the extension length of the first clamp 62, simply loosen the bolt, move the first clamp 62 up or down so that the bolt moves to the appropriate position in the waist hole, and then tighten the bolt again to fix the first clamp 62 and the first clamping arm 61 again.

[0076] A slotted hole can also be provided on the second clamping arm 71, extending through one side of the second groove 711. The second clamp 72 has a mounting hole, and is fixed to the second clamping arm 71 by bolts passing through the mounting hole and the slotted hole. When it is necessary to adjust the extension length of the second clamp 72, simply loosen the bolts.

[0077] The bolt is moved up or down, and the second clamp 72 is moved to the appropriate position in the waist hole. Then the bolt is tightened again to fix the second clamp 72 and the second clamp arm 71.

[0078] Reference Figure 8 The second clamp 72 is also provided with an opening 721, which is directly opposite the first clamp 62. The opening 721 and the first clamp 62 cooperate to enable the clamp to hold the item securely.

[0079] Preferably, in one embodiment of the present invention, the clamping arm seat 10 is provided with multiple holes, which reduces the mass of the clamping arm seat 10, thereby achieving the lightweighting of the material gripper.

[0080] 0 Furthermore, such as Figure 1 As shown, the lever 20 moves up and down via the opening and closing rocker arm A.

[0081] A second spring 22 is provided at the connection between the clamping rocker arm A and the pull rod 20. The second spring 22 is located on the outer wall of the pull rod 20, and one end of the second spring 22 abuts against the bottom of the nut 23, which is threadedly connected to the pull rod 20. The nut 23 is used to fix the position of the second spring 22. The second spring 22 provides a buffer when the pull rod 20 is driven by the clamping rocker arm A, thereby preventing the pull rod 20 from being damaged.

[0082] 5. It is understood that those skilled in the art can readily grasp the technology of the present invention.

[0083] Any equivalent substitutions or alterations to the scheme and its inventive concept shall fall within the scope of protection of this invention.

Claims

1. A material gripper for a cold heading machine, characterized in that, include: The clamping arm seat has a through-hole forming an installation cavity; A pull rod passes through the mounting cavity from top to bottom and is used to move up and down within the mounting cavity; A first connecting plate and a second connecting plate, one end of the first connecting plate being rotatably connected to the lower end of the pull rod, and one end of the second connecting plate being rotatably connected to the lower end of the pull rod; The connecting rod is inserted into the clamp arm seat; An adjusting rod is inserted into the clamp arm seat. The adjusting rod includes a first part, a second part, and a third part. The first part and the third part are coaxially arranged and rotatably connected to the clamp arm seat. The second part is not coaxially arranged with the first part and is rotatably connected to one end of the first clamping member. An adjusting groove is provided on the first part. The rod diameters of the first part, the second part, and the third part decrease in that order. A first clamping member and a second clamping member are provided. One end of the first clamping member is rotatably connected to the adjusting rod, and the middle of the first clamping member is rotatably connected to the other end of the first connecting plate. One end of the second clamping member is rotatably connected to the connecting rod, and the middle of the second clamping member is rotatably connected to the other end of the second connecting plate. The bottoms of the first clamping member and the second clamping member are spaced apart by a gap for clamping the workpiece. The pull rod is used to move up and down to drive the telescopic first clamping member and the telescopic second clamping member to clamp the workpiece. The adjusting rod is an eccentric rod, which is used to drive the first clamping member to rotate and thus adjust the size of the gap.

2. The material gripper for a cold heading machine according to claim 1, characterized in that, The gripper also includes a fastener mounted on the gripper arm seat, the fastener being used to fix the adjusting rod relative to the gripper arm seat.

3. The material gripper for a cold heading machine according to claim 1, characterized in that, The gripper also includes a first spring disposed within the mounting cavity, with one end of the first spring abutting against the top of the mounting cavity and the other end abutting against the lower part of the pull rod.

4. The material gripper for a cold heading machine according to claim 1, characterized in that, The first clamping member includes a first clamping arm and a first clamp. The first clamping arm is rotatably connected to the second part and the first connecting plate. The first clamp is used to clamp the workpiece. The first clamp is installed on the lower part of the first clamping arm.

5. The material gripper for a cold heading machine according to claim 4, characterized in that, The first clamping arm is provided with a first groove, and the first clamp is disposed in the first groove.

6. The material gripper for a cold heading machine according to claim 1, characterized in that, The second clamping member includes a second clamping arm and a second clamp. The second clamping arm is rotatably connected to the connecting rod and the second connecting plate, and the second clamp is installed on the lower part of the second clamping arm.

7. The material gripper for a cold heading machine according to claim 6, characterized in that, The second clamp has an opening.

8. The material gripper for a cold heading machine according to claim 7, characterized in that, The second clamping arm is provided with a second groove, and the second clamp is disposed in the second groove.

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