Manual holding clamp

Abstract

The utility model relates to the technical field of forging equipment, in particular to a manual holding clamp. Comprising a first plier body and a second plier body, each of the first plier body and the second plier body comprises a clamping arm and a plier handle, a clamping head is arranged on the inner side of each clamping arm, a groove with a triangular cross section is formed in the inner side of each clamping head, a long hole is formed in the end, close to the corresponding plier handle, of the clamping arm on the first plier body, and the long hole is communicated with the groove. A rotating shaft is arranged at the end, close to the clamp handle, of the clamping arm on the second clamp body and located in the long hole, and a bolt capable of abutting against one side of the rotating shaft is arranged at the end, away from the clamping arm where the long hole is located, of the long hole. The side face forging clamp can clamp a columnar blank with a large length so as to forge the side face of the columnar blank.

Description

Technical Field

[0001] The utility model relates to the technical field of forging equipment, in particular to a manual clamp. Background Art

[0002] Manual clamps are used to clamp the workpiece during forging so that the workpiece can be in a desired posture. The structure of the manual clamps in the prior art is shown in the patent application number 201420749383.8, which is called a self-locking forging operating clamp, and includes two clamp rods and movable rivets. One end of the clamp rod is an operating handle and the other end is a clamping end. The two clamp rods are hingedly connected by movable rivets. This structure is competent when clamping the side of a shorter columnar blank so that the blank is in a nearly vertical state and forging in the axial direction of the blank. However, when the length of the columnar blank is large and only the side is forged, the clamps of this structure will be difficult to be competent. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a manual clamp for the above-mentioned technical deficiencies.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a manual clamp, including a first clamp body and a second clamp body, the first clamp body and the second clamp body both include a clamp arm and a clamp handle, a clamp head is arranged on the inner side of the clamp arm, and a groove with a triangular cross-section is arranged on the inner side of the clamp head, the clamp arm on the first clamp body is provided with a long hole at one end close to the clamp handle, and the clamp arm on the second clamp body is provided with a rotating shaft at one end close to the clamp handle, the rotating shaft is located in the long hole, and a bolt capable of supporting one side of the rotating shaft is arranged at the end of the long hole away from the clamp arm where the long hole is located.

[0005] To further optimize the technical solution, the cross section of the groove on the inner side of the clamping head is a right triangle.

[0006] To further optimize the technical solution, auxiliary rods are provided on both the first pliers body and the second pliers body, and the auxiliary rods are located on the outer side of one end of the pliers handle close to the clamping arm.

[0007] To further optimize the technical solution, both the first pliers body and the second pliers body are provided with a holding portion, and the holding portion is located on a side of the clamping arm close to the pliers handle.

[0008] To further optimize the technical solution, the holding portion on the first pliers body is provided with a support portion on a side away from the second pliers body, and the holding portion on the second pliers body is provided with a support portion on a side away from the first pliers body.

[0009] Compared with the prior art, the utility model has the following advantages: a clamping head is provided on the clamping arms of the first clamp body and the second clamp body, and a groove is provided on the inner side of the clamping head. The distance between the two grooves after clamping the workpiece can be pre-adjusted by turning the bolt, so that the front and rear ends of the groove can clamp the outer wall of the workpiece as much as possible, so that a columnar blank with a larger length can be clamped to forge its side. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The figure is a schematic diagram of the structure of a manual clamp.

[0011] Figure 2 It is a schematic structural diagram of the first clamp body.

[0012] Figure 3 It is a schematic structural diagram of the second clamp body.

[0013] Figure 4 It is a schematic diagram of the structure of a manual clamp provided with a support portion.

[0014] In the figure: 1. first clamp body; 11. clamping arm; 12. clamping head; 13. bolt; 14. long hole; 15. holding part; 16. clamp handle; 17. auxiliary rod; 18. supporting part; 2. second clamp body; 21. rotating shaft; 3. workpiece. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0016] Specific implementation method: Combination Figure 1-4As shown, a manual clamp comprises a first clamp body 1 and a second clamp body 2, wherein the first clamp body 1 and the second clamp body 2 both comprise a clamp arm 11 and a clamp handle 16, a clamp head 12 is arranged on the inner side of the clamp arm 11, a groove with a triangular cross section is arranged on the inner side of the clamp head 12, and the two grooves are symmetrical about the symmetry plane of the clamp, a long hole 14 is arranged on the end of the clamp arm 11 on the first clamp body 1 close to the clamp handle 16, a rotating shaft 21 is arranged on the end of the clamp arm 11 on the second clamp body 2 close to the clamp handle 16, the rotating shaft 21 is located in the long hole 14, the rotating shaft 21 can slide and rotate relative to the long hole 14, and a bolt 13 capable of supporting one side of the rotating shaft 21 is arranged on the end of the long hole 14 away from the clamp arm 11 where the long hole 14 is located. When in use, due to the presence of the grooves, the clamp can clamp workpieces that are approximately cylindrical and workpieces with approximately square cross-sections. The bolt 13 can be turned according to the size of the workpiece to pre-adjust the distance between the two grooves when clamping the workpiece, so that the front and rear ends of the grooves can clamp the outer wall of the workpiece as tightly as possible, and the workpiece is not easily skewed.

[0017] Furthermore, the groove inside the clamping head 12 has a right triangle cross section, which enables a more secure clamping when clamping a workpiece with a cross section approximately in the shape of a square.

[0018] Furthermore, the first pliers body 1 and the second pliers body 2 are both provided with an auxiliary rod 17, and the auxiliary rod 17 is located outside one end of the pliers handle 16 close to the clamping arm 11. When in use, when moving the workpiece 3 back and forth on the anvil, the other two operators can hold the two auxiliary rods 17 respectively to push the clamp back and forth, so as to make it easier to move the workpiece 3.

[0019] Furthermore, the first pliers body 1 and the second pliers body 2 are both provided with a holding portion 15, which is located on the side of the clamping arm 11 near the clamp handle 16. When forging a long workpiece away from one end of the clamp (hereinafter referred to as the front end, the other end is referred to as the rear end), the rear end is located outside the anvil and far away from the anvil. Because it is very heavy, it is difficult to keep the workpiece approximately horizontal with the clamp. Therefore, during forging, a ring-shaped iron chain is generally hung under the crane (the two ends of the iron chain are connected to the hook of the crane, the iron chain hangs freely, and its original middle part is located at the lowest end). Then the clamping arm 11 passes through the lower end of the iron chain, and the holding portion 15 is hung on the lower end of the iron chain. The holding portion 15 is wide, which increases the strength. The crane is also operated by someone to keep the workpiece approximately horizontal when the workpiece moves forward and backward. The auxiliary rod 17 is set at the end of the holding portion 15 away from the clamping arm 11. Due to the existence of the auxiliary rod 17 and the clamping arm 11, the iron chain is not easy to fall off from the holding portion 15 when the clamp moves forward and backward.

[0020] Furthermore, a support portion 18 is provided on the side of the holding portion 15 on the first pliers body 1 away from the second pliers body 2, and a support portion 18 is provided on the side of the holding portion 15 on the second pliers body 2 away from the first pliers body 1. The support portion 18 is preferably semi-annular. When the workpiece is rotated to forge its side in another direction, the clamp needs to be rotated, and at this time the holding portion 15 is hung on the iron chain. If there is no support portion 18, the total thickness of the two holding portions 15 is greatly different from the width of the clamp at the holding portion 15. When rotating the clamp, although the auxiliary rod 17 is held by hand to rotate, it is still a bit difficult. When there is a support portion 18 (although the two sides of the two holding portions 15 may not be aligned at this time), rotating the clamp will be more labor-saving.

[0021] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A manual clamp, comprising a first clamp body (1) and a second clamp body (2), wherein the first clamp body (1) and the second clamp body (2) both comprise a clamp arm (11) and a clamp handle (16), characterized in that: A clamping head (12) is arranged on the inner side of the clamping arm (11), and a groove with a triangular cross-section is arranged on the inner side of the clamping head (12); a long hole (14) is arranged on the end of the clamping arm (11) on the first clamp body (1) close to the clamp handle (16); a rotating shaft (21) is arranged on the end of the clamping arm (11) on the second clamp body (2) close to the clamp handle (16); the rotating shaft (21) is located in the long hole (14); and a bolt (13) capable of supporting one side of the rotating shaft (21) is arranged on the end of the long hole (14) away from the clamping arm (11) where the long hole (14) is located.

2. A manual clamp according to claim 1, characterized in that: The cross section of the groove inside the clamping head (12) is in the form of a right triangle.

3. A manual clamp according to claim 1, characterized in that: An auxiliary rod (17) is provided on both the first pliers body (1) and the second pliers body (2); the auxiliary rod (17) is located on the outside of one end of the pliers handle (16) close to the clamping arm (11).

4. A manual clamp according to any one of claims 1 to 3, characterized in that: The first pliers body (1) and the second pliers body (2) are both provided with a holding portion (15), and the holding portion (15) is located on a side of the clamping arm (11) close to the pliers handle (16).

5. A manual clamp according to claim 4, characterized in that: The holding portion (15) on the first pliers body (1) is provided with a support portion (18) on a side away from the second pliers body (2), and the holding portion (15) on the second pliers body (2) is provided with a support portion (18) on a side away from the first pliers body (1).

Images